1a6d42e7dSPeter Dunlap /* 2a6d42e7dSPeter Dunlap * CDDL HEADER START 3a6d42e7dSPeter Dunlap * 4a6d42e7dSPeter Dunlap * The contents of this file are subject to the terms of the 5a6d42e7dSPeter Dunlap * Common Development and Distribution License (the "License"). 6a6d42e7dSPeter Dunlap * You may not use this file except in compliance with the License. 7a6d42e7dSPeter Dunlap * 8a6d42e7dSPeter Dunlap * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9a6d42e7dSPeter Dunlap * or http://www.opensolaris.org/os/licensing. 10a6d42e7dSPeter Dunlap * See the License for the specific language governing permissions 11a6d42e7dSPeter Dunlap * and limitations under the License. 12a6d42e7dSPeter Dunlap * 13a6d42e7dSPeter Dunlap * When distributing Covered Code, include this CDDL HEADER in each 14a6d42e7dSPeter Dunlap * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15a6d42e7dSPeter Dunlap * If applicable, add the following below this CDDL HEADER, with the 16a6d42e7dSPeter Dunlap * fields enclosed by brackets "[]" replaced with your own identifying 17a6d42e7dSPeter Dunlap * information: Portions Copyright [yyyy] [name of copyright owner] 18a6d42e7dSPeter Dunlap * 19a6d42e7dSPeter Dunlap * CDDL HEADER END 20a6d42e7dSPeter Dunlap */ 21a6d42e7dSPeter Dunlap /* 22d618d68dSPriya Krishnan * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. 23a6d42e7dSPeter Dunlap */ 24*6319b0c7SGarrett D'Amore /* 25*6319b0c7SGarrett D'Amore * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 26*6319b0c7SGarrett D'Amore */ 27a6d42e7dSPeter Dunlap 28a6d42e7dSPeter Dunlap #include <sys/cpuvar.h> 29a6d42e7dSPeter Dunlap #include <sys/types.h> 30a6d42e7dSPeter Dunlap #include <sys/conf.h> 31a6d42e7dSPeter Dunlap #include <sys/stat.h> 32a6d42e7dSPeter Dunlap #include <sys/file.h> 33a6d42e7dSPeter Dunlap #include <sys/ddi.h> 34a6d42e7dSPeter Dunlap #include <sys/sunddi.h> 35a6d42e7dSPeter Dunlap #include <sys/modctl.h> 36a6d42e7dSPeter Dunlap #include <sys/sysmacros.h> 37a6d42e7dSPeter Dunlap #include <sys/socket.h> 38a6d42e7dSPeter Dunlap #include <sys/strsubr.h> 39a6d42e7dSPeter Dunlap #include <sys/nvpair.h> 40a6d42e7dSPeter Dunlap 41a6d42e7dSPeter Dunlap #include <sys/stmf.h> 42a6d42e7dSPeter Dunlap #include <sys/stmf_ioctl.h> 43a6d42e7dSPeter Dunlap #include <sys/portif.h> 44a6d42e7dSPeter Dunlap #include <sys/idm/idm.h> 45a6d42e7dSPeter Dunlap #include <sys/idm/idm_conn_sm.h> 464558d122SViswanathan Kannappan 474558d122SViswanathan Kannappan #include "iscsit_isns.h" 484558d122SViswanathan Kannappan #include "iscsit.h" 49a6d42e7dSPeter Dunlap 50a6d42e7dSPeter Dunlap #define ISCSIT_VERSION BUILD_DATE "-1.18dev" 51a6d42e7dSPeter Dunlap #define ISCSIT_NAME_VERSION "COMSTAR ISCSIT v" ISCSIT_VERSION 52a6d42e7dSPeter Dunlap 53a6d42e7dSPeter Dunlap /* 54a6d42e7dSPeter Dunlap * DDI entry points. 55a6d42e7dSPeter Dunlap */ 56a6d42e7dSPeter Dunlap static int iscsit_drv_attach(dev_info_t *, ddi_attach_cmd_t); 57a6d42e7dSPeter Dunlap static int iscsit_drv_detach(dev_info_t *, ddi_detach_cmd_t); 58a6d42e7dSPeter Dunlap static int iscsit_drv_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **); 59a6d42e7dSPeter Dunlap static int iscsit_drv_open(dev_t *, int, int, cred_t *); 60a6d42e7dSPeter Dunlap static int iscsit_drv_close(dev_t, int, int, cred_t *); 61a6d42e7dSPeter Dunlap static boolean_t iscsit_drv_busy(void); 62a6d42e7dSPeter Dunlap static int iscsit_drv_ioctl(dev_t, int, intptr_t, int, cred_t *, int *); 63a6d42e7dSPeter Dunlap 64a6d42e7dSPeter Dunlap extern struct mod_ops mod_miscops; 65a6d42e7dSPeter Dunlap 66a6d42e7dSPeter Dunlap 67a6d42e7dSPeter Dunlap static struct cb_ops iscsit_cb_ops = { 68a6d42e7dSPeter Dunlap iscsit_drv_open, /* cb_open */ 69a6d42e7dSPeter Dunlap iscsit_drv_close, /* cb_close */ 70a6d42e7dSPeter Dunlap nodev, /* cb_strategy */ 71a6d42e7dSPeter Dunlap nodev, /* cb_print */ 72a6d42e7dSPeter Dunlap nodev, /* cb_dump */ 73a6d42e7dSPeter Dunlap nodev, /* cb_read */ 74a6d42e7dSPeter Dunlap nodev, /* cb_write */ 75a6d42e7dSPeter Dunlap iscsit_drv_ioctl, /* cb_ioctl */ 76a6d42e7dSPeter Dunlap nodev, /* cb_devmap */ 77a6d42e7dSPeter Dunlap nodev, /* cb_mmap */ 78a6d42e7dSPeter Dunlap nodev, /* cb_segmap */ 79a6d42e7dSPeter Dunlap nochpoll, /* cb_chpoll */ 80a6d42e7dSPeter Dunlap ddi_prop_op, /* cb_prop_op */ 81a6d42e7dSPeter Dunlap NULL, /* cb_streamtab */ 82a6d42e7dSPeter Dunlap D_MP, /* cb_flag */ 83a6d42e7dSPeter Dunlap CB_REV, /* cb_rev */ 84a6d42e7dSPeter Dunlap nodev, /* cb_aread */ 85a6d42e7dSPeter Dunlap nodev, /* cb_awrite */ 86a6d42e7dSPeter Dunlap }; 87a6d42e7dSPeter Dunlap 88a6d42e7dSPeter Dunlap static struct dev_ops iscsit_dev_ops = { 89a6d42e7dSPeter Dunlap DEVO_REV, /* devo_rev */ 90a6d42e7dSPeter Dunlap 0, /* devo_refcnt */ 91a6d42e7dSPeter Dunlap iscsit_drv_getinfo, /* devo_getinfo */ 92a6d42e7dSPeter Dunlap nulldev, /* devo_identify */ 93a6d42e7dSPeter Dunlap nulldev, /* devo_probe */ 94a6d42e7dSPeter Dunlap iscsit_drv_attach, /* devo_attach */ 95a6d42e7dSPeter Dunlap iscsit_drv_detach, /* devo_detach */ 96a6d42e7dSPeter Dunlap nodev, /* devo_reset */ 97a6d42e7dSPeter Dunlap &iscsit_cb_ops, /* devo_cb_ops */ 98a6d42e7dSPeter Dunlap NULL, /* devo_bus_ops */ 99a6d42e7dSPeter Dunlap NULL, /* devo_power */ 10063528ae4SJames Moore ddi_quiesce_not_needed, /* quiesce */ 101a6d42e7dSPeter Dunlap }; 102a6d42e7dSPeter Dunlap 103a6d42e7dSPeter Dunlap static struct modldrv modldrv = { 104a6d42e7dSPeter Dunlap &mod_driverops, 105a6d42e7dSPeter Dunlap "iSCSI Target", 106a6d42e7dSPeter Dunlap &iscsit_dev_ops, 107a6d42e7dSPeter Dunlap }; 108a6d42e7dSPeter Dunlap 109a6d42e7dSPeter Dunlap static struct modlinkage modlinkage = { 110a6d42e7dSPeter Dunlap MODREV_1, 111a6d42e7dSPeter Dunlap &modldrv, 112a6d42e7dSPeter Dunlap NULL, 113a6d42e7dSPeter Dunlap }; 114a6d42e7dSPeter Dunlap 115a6d42e7dSPeter Dunlap 116a6d42e7dSPeter Dunlap iscsit_global_t iscsit_global; 117a6d42e7dSPeter Dunlap 118a6d42e7dSPeter Dunlap kmem_cache_t *iscsit_status_pdu_cache; 119a6d42e7dSPeter Dunlap 120a6d42e7dSPeter Dunlap boolean_t iscsit_sm_logging = B_FALSE; 121a6d42e7dSPeter Dunlap 1223fc1e17eSPriya Krishnan kmutex_t login_sm_session_mutex; 1233fc1e17eSPriya Krishnan 124a6d42e7dSPeter Dunlap static idm_status_t iscsit_init(dev_info_t *dip); 125a6d42e7dSPeter Dunlap static idm_status_t iscsit_enable_svc(iscsit_hostinfo_t *hostinfo); 126a6d42e7dSPeter Dunlap static void iscsit_disable_svc(void); 127a6d42e7dSPeter Dunlap 128d618d68dSPriya Krishnan static int 129d618d68dSPriya Krishnan iscsit_check_cmdsn_and_queue(idm_pdu_t *rx_pdu); 130d618d68dSPriya Krishnan 131d618d68dSPriya Krishnan static void 132d618d68dSPriya Krishnan iscsit_add_pdu_to_queue(iscsit_sess_t *ist, idm_pdu_t *rx_pdu); 133d618d68dSPriya Krishnan 134d618d68dSPriya Krishnan static idm_pdu_t * 135d618d68dSPriya Krishnan iscsit_remove_pdu_from_queue(iscsit_sess_t *ist, uint32_t cmdsn); 136d618d68dSPriya Krishnan 137d618d68dSPriya Krishnan static void 138d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(iscsit_sess_t *ist); 139d618d68dSPriya Krishnan 140d618d68dSPriya Krishnan static void 141d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_session(iscsit_sess_t *ist); 142d618d68dSPriya Krishnan 143d618d68dSPriya Krishnan static void 144d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor(void *arg); 145d618d68dSPriya Krishnan 146d618d68dSPriya Krishnan static void 147d618d68dSPriya Krishnan iscsit_post_staged_pdu(idm_pdu_t *rx_pdu); 148d618d68dSPriya Krishnan 149d618d68dSPriya Krishnan static void 150d618d68dSPriya Krishnan iscsit_post_scsi_cmd(idm_conn_t *ic, idm_pdu_t *rx_pdu); 151d618d68dSPriya Krishnan 152a6d42e7dSPeter Dunlap static void 153a6d42e7dSPeter Dunlap iscsit_op_scsi_task_mgmt(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 154a6d42e7dSPeter Dunlap 155a6d42e7dSPeter Dunlap static void 156a6d42e7dSPeter Dunlap iscsit_pdu_op_noop(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 157a6d42e7dSPeter Dunlap 158a6d42e7dSPeter Dunlap static void 159a6d42e7dSPeter Dunlap iscsit_pdu_op_login_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 160a6d42e7dSPeter Dunlap 161a6d42e7dSPeter Dunlap void 162a6d42e7dSPeter Dunlap iscsit_pdu_op_text_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 163a6d42e7dSPeter Dunlap 164a6d42e7dSPeter Dunlap static void 165a6d42e7dSPeter Dunlap iscsit_pdu_op_logout_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 166a6d42e7dSPeter Dunlap 167a6d42e7dSPeter Dunlap int iscsit_cmd_window(); 168a6d42e7dSPeter Dunlap 169d618d68dSPriya Krishnan static int 170d618d68dSPriya Krishnan iscsit_sna_lt(uint32_t sn1, uint32_t sn2); 171d618d68dSPriya Krishnan 172a6d42e7dSPeter Dunlap void 173a6d42e7dSPeter Dunlap iscsit_set_cmdsn(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 174a6d42e7dSPeter Dunlap 175a6d42e7dSPeter Dunlap static void 176a6d42e7dSPeter Dunlap iscsit_deferred_dispatch(idm_pdu_t *rx_pdu); 177a6d42e7dSPeter Dunlap 178a6d42e7dSPeter Dunlap static void 179a6d42e7dSPeter Dunlap iscsit_deferred(void *rx_pdu_void); 180a6d42e7dSPeter Dunlap 181a6d42e7dSPeter Dunlap static idm_status_t 182a6d42e7dSPeter Dunlap iscsit_conn_accept(idm_conn_t *ic); 183a6d42e7dSPeter Dunlap 184a6d42e7dSPeter Dunlap static idm_status_t 185a6d42e7dSPeter Dunlap iscsit_ffp_enabled(idm_conn_t *ic); 186a6d42e7dSPeter Dunlap 187a6d42e7dSPeter Dunlap static idm_status_t 188a6d42e7dSPeter Dunlap iscsit_ffp_disabled(idm_conn_t *ic, idm_ffp_disable_t disable_class); 189a6d42e7dSPeter Dunlap 190a6d42e7dSPeter Dunlap static idm_status_t 191a6d42e7dSPeter Dunlap iscsit_conn_lost(idm_conn_t *ic); 192a6d42e7dSPeter Dunlap 193a6d42e7dSPeter Dunlap static idm_status_t 194a6d42e7dSPeter Dunlap iscsit_conn_destroy(idm_conn_t *ic); 195a6d42e7dSPeter Dunlap 196a6d42e7dSPeter Dunlap static stmf_data_buf_t * 197a6d42e7dSPeter Dunlap iscsit_dbuf_alloc(scsi_task_t *task, uint32_t size, uint32_t *pminsize, 198a6d42e7dSPeter Dunlap uint32_t flags); 199a6d42e7dSPeter Dunlap 200a6d42e7dSPeter Dunlap static void 201a6d42e7dSPeter Dunlap iscsit_dbuf_free(stmf_dbuf_store_t *ds, stmf_data_buf_t *dbuf); 202a6d42e7dSPeter Dunlap 203a6d42e7dSPeter Dunlap static void 204a6d42e7dSPeter Dunlap iscsit_buf_xfer_cb(idm_buf_t *idb, idm_status_t status); 205a6d42e7dSPeter Dunlap 206a6d42e7dSPeter Dunlap static void 207a6d42e7dSPeter Dunlap iscsit_send_good_status_done(idm_pdu_t *pdu, idm_status_t status); 208a6d42e7dSPeter Dunlap 209a6d42e7dSPeter Dunlap static void 210a6d42e7dSPeter Dunlap iscsit_send_status_done(idm_pdu_t *pdu, idm_status_t status); 211a6d42e7dSPeter Dunlap 212a6d42e7dSPeter Dunlap static stmf_status_t 213a6d42e7dSPeter Dunlap iscsit_idm_to_stmf(idm_status_t idmrc); 214a6d42e7dSPeter Dunlap 215a6d42e7dSPeter Dunlap static iscsit_task_t * 216a6d42e7dSPeter Dunlap iscsit_task_alloc(iscsit_conn_t *ict); 217a6d42e7dSPeter Dunlap 218a6d42e7dSPeter Dunlap static void 219a6d42e7dSPeter Dunlap iscsit_task_free(iscsit_task_t *itask); 220a6d42e7dSPeter Dunlap 221a6d42e7dSPeter Dunlap static iscsit_task_t * 222a6d42e7dSPeter Dunlap iscsit_tm_task_alloc(iscsit_conn_t *ict); 223a6d42e7dSPeter Dunlap 224a6d42e7dSPeter Dunlap static void 225a6d42e7dSPeter Dunlap iscsit_tm_task_free(iscsit_task_t *itask); 226a6d42e7dSPeter Dunlap 22772cf3143Speter dunlap static idm_status_t 22872cf3143Speter dunlap iscsit_task_start(iscsit_task_t *itask); 22972cf3143Speter dunlap 23072cf3143Speter dunlap static void 23172cf3143Speter dunlap iscsit_task_done(iscsit_task_t *itask); 23272cf3143Speter dunlap 233a6d42e7dSPeter Dunlap static int 234a6d42e7dSPeter Dunlap iscsit_status_pdu_constructor(void *pdu_void, void *arg, int flags); 235a6d42e7dSPeter Dunlap 236a6d42e7dSPeter Dunlap static void 237a6d42e7dSPeter Dunlap iscsit_pp_cb(struct stmf_port_provider *pp, int cmd, void *arg, uint32_t flags); 238a6d42e7dSPeter Dunlap 239a6d42e7dSPeter Dunlap static it_cfg_status_t 240a6d42e7dSPeter Dunlap iscsit_config_merge(it_config_t *cfg); 241a6d42e7dSPeter Dunlap 242a6d42e7dSPeter Dunlap static idm_status_t 243a6d42e7dSPeter Dunlap iscsit_login_fail(idm_conn_t *ic); 244a6d42e7dSPeter Dunlap 24572cf3143Speter dunlap static boolean_t iscsit_cmdsn_in_window(iscsit_conn_t *ict, uint32_t cmdsn); 24672cf3143Speter dunlap static void iscsit_send_direct_scsi_resp(iscsit_conn_t *ict, idm_pdu_t *rx_pdu, 24772cf3143Speter dunlap uint8_t response, uint8_t cmd_status); 24872cf3143Speter dunlap static void iscsit_send_task_mgmt_resp(idm_pdu_t *tm_resp_pdu, 24972cf3143Speter dunlap uint8_t tm_status); 25072cf3143Speter dunlap 251d618d68dSPriya Krishnan /* 252d618d68dSPriya Krishnan * MC/S: Out-of-order commands are staged on a session-wide wait 253d618d68dSPriya Krishnan * queue until a system-tunable threshold is reached. A separate 254d618d68dSPriya Krishnan * thread is used to scan the staging queue on all the session, 255d618d68dSPriya Krishnan * If a delayed PDU does not arrive within a timeout, the target 256d618d68dSPriya Krishnan * will advance to the staged PDU that is next in sequence, skipping 257d618d68dSPriya Krishnan * over the missing PDU(s) to go past a hole in the sequence. 258d618d68dSPriya Krishnan */ 259d618d68dSPriya Krishnan volatile int rxpdu_queue_threshold = ISCSIT_RXPDU_QUEUE_THRESHOLD; 260d618d68dSPriya Krishnan 261d618d68dSPriya Krishnan static kmutex_t iscsit_rxpdu_queue_monitor_mutex; 262d618d68dSPriya Krishnan kthread_t *iscsit_rxpdu_queue_monitor_thr_id; 263d618d68dSPriya Krishnan static kt_did_t iscsit_rxpdu_queue_monitor_thr_did; 264d618d68dSPriya Krishnan static boolean_t iscsit_rxpdu_queue_monitor_thr_running; 265d618d68dSPriya Krishnan static kcondvar_t iscsit_rxpdu_queue_monitor_cv; 266d618d68dSPriya Krishnan 267a6d42e7dSPeter Dunlap int 268a6d42e7dSPeter Dunlap _init(void) 269a6d42e7dSPeter Dunlap { 270a6d42e7dSPeter Dunlap int rc; 271a6d42e7dSPeter Dunlap 272a6d42e7dSPeter Dunlap rw_init(&iscsit_global.global_rwlock, NULL, RW_DRIVER, NULL); 2738c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_init(&iscsit_global.global_state_mutex, NULL, 2748c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States MUTEX_DRIVER, NULL); 275a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DETACHED; 276a6d42e7dSPeter Dunlap 277d618d68dSPriya Krishnan mutex_init(&iscsit_rxpdu_queue_monitor_mutex, NULL, 278d618d68dSPriya Krishnan MUTEX_DRIVER, NULL); 2793fc1e17eSPriya Krishnan mutex_init(&login_sm_session_mutex, NULL, MUTEX_DRIVER, NULL); 280d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_id = NULL; 281d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_running = B_FALSE; 282d618d68dSPriya Krishnan cv_init(&iscsit_rxpdu_queue_monitor_cv, NULL, CV_DEFAULT, NULL); 283d618d68dSPriya Krishnan 284a6d42e7dSPeter Dunlap if ((rc = mod_install(&modlinkage)) != 0) { 2858c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_destroy(&iscsit_global.global_state_mutex); 286a6d42e7dSPeter Dunlap rw_destroy(&iscsit_global.global_rwlock); 287a6d42e7dSPeter Dunlap return (rc); 288a6d42e7dSPeter Dunlap } 289a6d42e7dSPeter Dunlap 290a6d42e7dSPeter Dunlap return (rc); 291a6d42e7dSPeter Dunlap } 292a6d42e7dSPeter Dunlap 293a6d42e7dSPeter Dunlap int 294a6d42e7dSPeter Dunlap _info(struct modinfo *modinfop) 295a6d42e7dSPeter Dunlap { 296a6d42e7dSPeter Dunlap return (mod_info(&modlinkage, modinfop)); 297a6d42e7dSPeter Dunlap } 298a6d42e7dSPeter Dunlap 299a6d42e7dSPeter Dunlap int 300a6d42e7dSPeter Dunlap _fini(void) 301a6d42e7dSPeter Dunlap { 302a6d42e7dSPeter Dunlap int rc; 303a6d42e7dSPeter Dunlap 304a6d42e7dSPeter Dunlap rc = mod_remove(&modlinkage); 305a6d42e7dSPeter Dunlap 306a6d42e7dSPeter Dunlap if (rc == 0) { 307d618d68dSPriya Krishnan mutex_destroy(&iscsit_rxpdu_queue_monitor_mutex); 3083fc1e17eSPriya Krishnan mutex_destroy(&login_sm_session_mutex); 309d618d68dSPriya Krishnan cv_destroy(&iscsit_rxpdu_queue_monitor_cv); 3108c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_destroy(&iscsit_global.global_state_mutex); 311a6d42e7dSPeter Dunlap rw_destroy(&iscsit_global.global_rwlock); 312a6d42e7dSPeter Dunlap } 313a6d42e7dSPeter Dunlap 314a6d42e7dSPeter Dunlap return (rc); 315a6d42e7dSPeter Dunlap } 316a6d42e7dSPeter Dunlap 317a6d42e7dSPeter Dunlap /* 318a6d42e7dSPeter Dunlap * DDI entry points. 319a6d42e7dSPeter Dunlap */ 320a6d42e7dSPeter Dunlap 321a6d42e7dSPeter Dunlap /* ARGSUSED */ 322a6d42e7dSPeter Dunlap static int 323a6d42e7dSPeter Dunlap iscsit_drv_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, 324a6d42e7dSPeter Dunlap void **result) 325a6d42e7dSPeter Dunlap { 326a6d42e7dSPeter Dunlap ulong_t instance = getminor((dev_t)arg); 327a6d42e7dSPeter Dunlap 328a6d42e7dSPeter Dunlap switch (cmd) { 329a6d42e7dSPeter Dunlap case DDI_INFO_DEVT2DEVINFO: 330a6d42e7dSPeter Dunlap *result = iscsit_global.global_dip; 331a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 332a6d42e7dSPeter Dunlap 333a6d42e7dSPeter Dunlap case DDI_INFO_DEVT2INSTANCE: 334a6d42e7dSPeter Dunlap *result = (void *)instance; 335a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 336a6d42e7dSPeter Dunlap 337a6d42e7dSPeter Dunlap default: 338a6d42e7dSPeter Dunlap break; 339a6d42e7dSPeter Dunlap } 340a6d42e7dSPeter Dunlap 341a6d42e7dSPeter Dunlap return (DDI_FAILURE); 342a6d42e7dSPeter Dunlap } 343a6d42e7dSPeter Dunlap 344a6d42e7dSPeter Dunlap static int 345a6d42e7dSPeter Dunlap iscsit_drv_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 346a6d42e7dSPeter Dunlap { 347a6d42e7dSPeter Dunlap if (cmd != DDI_ATTACH) { 348a6d42e7dSPeter Dunlap return (DDI_FAILURE); 349a6d42e7dSPeter Dunlap } 350a6d42e7dSPeter Dunlap 351a6d42e7dSPeter Dunlap if (ddi_get_instance(dip) != 0) { 352a6d42e7dSPeter Dunlap /* we only allow instance 0 to attach */ 353a6d42e7dSPeter Dunlap return (DDI_FAILURE); 354a6d42e7dSPeter Dunlap } 355a6d42e7dSPeter Dunlap 356a6d42e7dSPeter Dunlap /* create the minor node */ 357a6d42e7dSPeter Dunlap if (ddi_create_minor_node(dip, ISCSIT_MODNAME, S_IFCHR, 0, 358a6d42e7dSPeter Dunlap DDI_PSEUDO, 0) != DDI_SUCCESS) { 359a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "iscsit_drv_attach: " 360a6d42e7dSPeter Dunlap "failed creating minor node"); 361a6d42e7dSPeter Dunlap return (DDI_FAILURE); 362a6d42e7dSPeter Dunlap } 363a6d42e7dSPeter Dunlap 364a6d42e7dSPeter Dunlap if (iscsit_init(dip) != IDM_STATUS_SUCCESS) { 365a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "iscsit_drv_attach: " 366a6d42e7dSPeter Dunlap "failed to initialize"); 367a6d42e7dSPeter Dunlap ddi_remove_minor_node(dip, NULL); 368a6d42e7dSPeter Dunlap return (DDI_FAILURE); 369a6d42e7dSPeter Dunlap } 370a6d42e7dSPeter Dunlap 371a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 372a6d42e7dSPeter Dunlap iscsit_global.global_dip = dip; 373a6d42e7dSPeter Dunlap 374a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 375a6d42e7dSPeter Dunlap } 376a6d42e7dSPeter Dunlap 377a6d42e7dSPeter Dunlap /*ARGSUSED*/ 378a6d42e7dSPeter Dunlap static int 379a6d42e7dSPeter Dunlap iscsit_drv_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 380a6d42e7dSPeter Dunlap { 381a6d42e7dSPeter Dunlap if (cmd != DDI_DETACH) 382a6d42e7dSPeter Dunlap return (DDI_FAILURE); 383a6d42e7dSPeter Dunlap 3848c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* 3858c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * drv_detach is called in a context that owns the 3868c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * device node for the /dev/pseudo device. If this thread blocks 3878c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * for any resource, other threads that need the /dev/pseudo device 3888c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * may end up in a deadlock with this thread.Hence, we use a 3898c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * separate lock just for the structures that drv_detach needs 3908c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * to access. 3918c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States */ 3928c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 393a6d42e7dSPeter Dunlap if (iscsit_drv_busy()) { 3948c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 395a6d42e7dSPeter Dunlap return (EBUSY); 396a6d42e7dSPeter Dunlap } 397a6d42e7dSPeter Dunlap 398a6d42e7dSPeter Dunlap iscsit_global.global_dip = NULL; 399a6d42e7dSPeter Dunlap ddi_remove_minor_node(dip, NULL); 400a6d42e7dSPeter Dunlap 401a6d42e7dSPeter Dunlap ldi_ident_release(iscsit_global.global_li); 402a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DETACHED; 403a6d42e7dSPeter Dunlap 4048c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 405a6d42e7dSPeter Dunlap 406a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 407a6d42e7dSPeter Dunlap } 408a6d42e7dSPeter Dunlap 409a6d42e7dSPeter Dunlap /*ARGSUSED*/ 410a6d42e7dSPeter Dunlap static int 411a6d42e7dSPeter Dunlap iscsit_drv_open(dev_t *devp, int flag, int otyp, cred_t *credp) 412a6d42e7dSPeter Dunlap { 413a6d42e7dSPeter Dunlap return (0); 414a6d42e7dSPeter Dunlap } 415a6d42e7dSPeter Dunlap 416a6d42e7dSPeter Dunlap /* ARGSUSED */ 417a6d42e7dSPeter Dunlap static int 418a6d42e7dSPeter Dunlap iscsit_drv_close(dev_t dev, int flag, int otyp, cred_t *credp) 419a6d42e7dSPeter Dunlap { 420a6d42e7dSPeter Dunlap return (0); 421a6d42e7dSPeter Dunlap } 422a6d42e7dSPeter Dunlap 423a6d42e7dSPeter Dunlap static boolean_t 424a6d42e7dSPeter Dunlap iscsit_drv_busy(void) 425a6d42e7dSPeter Dunlap { 4268c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT(MUTEX_HELD(&iscsit_global.global_state_mutex)); 4278c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 428a6d42e7dSPeter Dunlap switch (iscsit_global.global_svc_state) { 429a6d42e7dSPeter Dunlap case ISE_DISABLED: 430a6d42e7dSPeter Dunlap case ISE_DETACHED: 431a6d42e7dSPeter Dunlap return (B_FALSE); 432a6d42e7dSPeter Dunlap default: 433a6d42e7dSPeter Dunlap return (B_TRUE); 434a6d42e7dSPeter Dunlap } 435a6d42e7dSPeter Dunlap /* NOTREACHED */ 436a6d42e7dSPeter Dunlap } 437a6d42e7dSPeter Dunlap 438a6d42e7dSPeter Dunlap /* ARGSUSED */ 439a6d42e7dSPeter Dunlap static int 440a6d42e7dSPeter Dunlap iscsit_drv_ioctl(dev_t drv, int cmd, intptr_t argp, int flag, cred_t *cred, 441a6d42e7dSPeter Dunlap int *retval) 442a6d42e7dSPeter Dunlap { 443a6d42e7dSPeter Dunlap iscsit_ioc_set_config_t setcfg; 444a6d42e7dSPeter Dunlap iscsit_ioc_set_config32_t setcfg32; 44507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States char *cfg_pnvlist = NULL; 44607a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States nvlist_t *cfg_nvlist = NULL; 44707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States it_config_t *cfg = NULL; 448a6d42e7dSPeter Dunlap idm_status_t idmrc; 449a6d42e7dSPeter Dunlap int rc = 0; 450a6d42e7dSPeter Dunlap 451a6d42e7dSPeter Dunlap if (drv_priv(cred) != 0) { 452a6d42e7dSPeter Dunlap return (EPERM); 453a6d42e7dSPeter Dunlap } 454a6d42e7dSPeter Dunlap 4558c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 456a6d42e7dSPeter Dunlap 457a6d42e7dSPeter Dunlap /* 458a6d42e7dSPeter Dunlap * Validate ioctl requests against global service state 459a6d42e7dSPeter Dunlap */ 460a6d42e7dSPeter Dunlap switch (iscsit_global.global_svc_state) { 461a6d42e7dSPeter Dunlap case ISE_ENABLED: 462a6d42e7dSPeter Dunlap if (cmd == ISCSIT_IOC_DISABLE_SVC) { 463a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLING; 464a6d42e7dSPeter Dunlap } else if (cmd == ISCSIT_IOC_ENABLE_SVC) { 465a6d42e7dSPeter Dunlap /* Already enabled */ 4668c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 467a6d42e7dSPeter Dunlap return (0); 468a6d42e7dSPeter Dunlap } else { 469a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_BUSY; 470a6d42e7dSPeter Dunlap } 471a6d42e7dSPeter Dunlap break; 472a6d42e7dSPeter Dunlap case ISE_DISABLED: 473a6d42e7dSPeter Dunlap if (cmd == ISCSIT_IOC_ENABLE_SVC) { 474a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_ENABLING; 475a6d42e7dSPeter Dunlap } else if (cmd == ISCSIT_IOC_DISABLE_SVC) { 476a6d42e7dSPeter Dunlap /* Already disabled */ 4778c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 478a6d42e7dSPeter Dunlap return (0); 479a6d42e7dSPeter Dunlap } else { 480a6d42e7dSPeter Dunlap rc = EFAULT; 481a6d42e7dSPeter Dunlap } 482a6d42e7dSPeter Dunlap break; 4838c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_BUSY: 484a6d42e7dSPeter Dunlap case ISE_ENABLING: 485a6d42e7dSPeter Dunlap case ISE_DISABLING: 486a6d42e7dSPeter Dunlap rc = EAGAIN; 487a6d42e7dSPeter Dunlap break; 488a6d42e7dSPeter Dunlap case ISE_DETACHED: 489a6d42e7dSPeter Dunlap default: 490a6d42e7dSPeter Dunlap rc = EFAULT; 491a6d42e7dSPeter Dunlap break; 492a6d42e7dSPeter Dunlap } 493a6d42e7dSPeter Dunlap 4948c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 495a6d42e7dSPeter Dunlap if (rc != 0) 496a6d42e7dSPeter Dunlap return (rc); 497a6d42e7dSPeter Dunlap 498a6d42e7dSPeter Dunlap /* Handle ioctl request (enable/disable have already been handled) */ 499a6d42e7dSPeter Dunlap switch (cmd) { 500a6d42e7dSPeter Dunlap case ISCSIT_IOC_SET_CONFIG: 50107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* Any errors must set state back to ISE_ENABLED */ 502a6d42e7dSPeter Dunlap switch (ddi_model_convert_from(flag & FMODELS)) { 503a6d42e7dSPeter Dunlap case DDI_MODEL_ILP32: 504a6d42e7dSPeter Dunlap if (ddi_copyin((void *)argp, &setcfg32, 50507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States sizeof (iscsit_ioc_set_config32_t), flag) != 0) { 50607a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EFAULT; 50707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 50807a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States } 509a6d42e7dSPeter Dunlap 510a6d42e7dSPeter Dunlap setcfg.set_cfg_pnvlist = 511a6d42e7dSPeter Dunlap (char *)((uintptr_t)setcfg32.set_cfg_pnvlist); 512a6d42e7dSPeter Dunlap setcfg.set_cfg_vers = setcfg32.set_cfg_vers; 513a6d42e7dSPeter Dunlap setcfg.set_cfg_pnvlist_len = 514a6d42e7dSPeter Dunlap setcfg32.set_cfg_pnvlist_len; 515a6d42e7dSPeter Dunlap break; 516a6d42e7dSPeter Dunlap case DDI_MODEL_NONE: 517a6d42e7dSPeter Dunlap if (ddi_copyin((void *)argp, &setcfg, 51807a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States sizeof (iscsit_ioc_set_config_t), flag) != 0) { 51907a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EFAULT; 52007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 52107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States } 522a6d42e7dSPeter Dunlap break; 523fcc214c3SCharles Ting default: 524fcc214c3SCharles Ting rc = EFAULT; 525fcc214c3SCharles Ting goto cleanup; 526a6d42e7dSPeter Dunlap } 527a6d42e7dSPeter Dunlap 528a6d42e7dSPeter Dunlap /* Check API version */ 529a6d42e7dSPeter Dunlap if (setcfg.set_cfg_vers != ISCSIT_API_VERS0) { 53007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EINVAL; 53107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 532a6d42e7dSPeter Dunlap } 533a6d42e7dSPeter Dunlap 534a6d42e7dSPeter Dunlap /* Config is in packed nvlist format so unpack it */ 535a6d42e7dSPeter Dunlap cfg_pnvlist = kmem_alloc(setcfg.set_cfg_pnvlist_len, 536a6d42e7dSPeter Dunlap KM_SLEEP); 537a6d42e7dSPeter Dunlap ASSERT(cfg_pnvlist != NULL); 538a6d42e7dSPeter Dunlap 539a6d42e7dSPeter Dunlap if (ddi_copyin(setcfg.set_cfg_pnvlist, cfg_pnvlist, 540a6d42e7dSPeter Dunlap setcfg.set_cfg_pnvlist_len, flag) != 0) { 54107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EFAULT; 54207a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 543a6d42e7dSPeter Dunlap } 544a6d42e7dSPeter Dunlap 54507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = nvlist_unpack(cfg_pnvlist, setcfg.set_cfg_pnvlist_len, 54607a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States &cfg_nvlist, KM_SLEEP); 54707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (rc != 0) { 54807a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 549a6d42e7dSPeter Dunlap } 550a6d42e7dSPeter Dunlap 551a6d42e7dSPeter Dunlap /* Translate nvlist */ 55207a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = it_nv_to_config(cfg_nvlist, &cfg); 55307a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (rc != 0) { 554a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "Configuration is invalid"); 55507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 556a6d42e7dSPeter Dunlap } 557a6d42e7dSPeter Dunlap 558a6d42e7dSPeter Dunlap /* Update config */ 55907a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = iscsit_config_merge(cfg); 56007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* FALLTHROUGH */ 56107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States 56207a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States cleanup: 56307a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (cfg) 56407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States it_config_free_cmn(cfg); 56507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (cfg_pnvlist) 566a6d42e7dSPeter Dunlap kmem_free(cfg_pnvlist, setcfg.set_cfg_pnvlist_len); 56707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (cfg_nvlist) 568a6d42e7dSPeter Dunlap nvlist_free(cfg_nvlist); 569a6d42e7dSPeter Dunlap 570a6d42e7dSPeter Dunlap /* 571a6d42e7dSPeter Dunlap * Now that the reconfig is complete set our state back to 572a6d42e7dSPeter Dunlap * enabled. 573a6d42e7dSPeter Dunlap */ 5748c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 575a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_ENABLED; 5768c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 577a6d42e7dSPeter Dunlap break; 578a6d42e7dSPeter Dunlap case ISCSIT_IOC_ENABLE_SVC: { 579a6d42e7dSPeter Dunlap iscsit_hostinfo_t hostinfo; 580a6d42e7dSPeter Dunlap 581a6d42e7dSPeter Dunlap if (ddi_copyin((void *)argp, &hostinfo.length, 582a6d42e7dSPeter Dunlap sizeof (hostinfo.length), flag) != 0) { 5838c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 584a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 5858c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 586a6d42e7dSPeter Dunlap return (EFAULT); 587a6d42e7dSPeter Dunlap } 588a6d42e7dSPeter Dunlap 589a6d42e7dSPeter Dunlap if (hostinfo.length > sizeof (hostinfo.fqhn)) 590a6d42e7dSPeter Dunlap hostinfo.length = sizeof (hostinfo.fqhn); 591a6d42e7dSPeter Dunlap 592a6d42e7dSPeter Dunlap if (ddi_copyin((void *)((caddr_t)argp + 593a6d42e7dSPeter Dunlap sizeof (hostinfo.length)), &hostinfo.fqhn, 594a6d42e7dSPeter Dunlap hostinfo.length, flag) != 0) { 5958c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 596a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 5978c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 598a6d42e7dSPeter Dunlap return (EFAULT); 599a6d42e7dSPeter Dunlap } 600a6d42e7dSPeter Dunlap 601a6d42e7dSPeter Dunlap idmrc = iscsit_enable_svc(&hostinfo); 6028c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 603a6d42e7dSPeter Dunlap if (idmrc == IDM_STATUS_SUCCESS) { 604a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_ENABLED; 605a6d42e7dSPeter Dunlap } else { 606a6d42e7dSPeter Dunlap rc = EIO; 607a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 608a6d42e7dSPeter Dunlap } 6098c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 610a6d42e7dSPeter Dunlap break; 611a6d42e7dSPeter Dunlap } 612a6d42e7dSPeter Dunlap case ISCSIT_IOC_DISABLE_SVC: 613a6d42e7dSPeter Dunlap iscsit_disable_svc(); 6148c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 615a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 6168c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 617a6d42e7dSPeter Dunlap break; 61807a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States 619a6d42e7dSPeter Dunlap default: 620a6d42e7dSPeter Dunlap rc = EINVAL; 6218c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 62207a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state = ISE_ENABLED; 6238c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 624a6d42e7dSPeter Dunlap } 625a6d42e7dSPeter Dunlap 626a6d42e7dSPeter Dunlap return (rc); 627a6d42e7dSPeter Dunlap } 628a6d42e7dSPeter Dunlap 629a6d42e7dSPeter Dunlap static idm_status_t 630a6d42e7dSPeter Dunlap iscsit_init(dev_info_t *dip) 631a6d42e7dSPeter Dunlap { 632a6d42e7dSPeter Dunlap int rc; 633a6d42e7dSPeter Dunlap 634a6d42e7dSPeter Dunlap rc = ldi_ident_from_dip(dip, &iscsit_global.global_li); 635a6d42e7dSPeter Dunlap ASSERT(rc == 0); /* Failure indicates invalid argument */ 636a6d42e7dSPeter Dunlap 637a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 638a6d42e7dSPeter Dunlap 639a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 640a6d42e7dSPeter Dunlap } 641a6d42e7dSPeter Dunlap 642a6d42e7dSPeter Dunlap /* 643a6d42e7dSPeter Dunlap * iscsit_enable_svc 644a6d42e7dSPeter Dunlap * 645a6d42e7dSPeter Dunlap * registers all the configured targets and target portals with STMF 646a6d42e7dSPeter Dunlap */ 647a6d42e7dSPeter Dunlap static idm_status_t 648a6d42e7dSPeter Dunlap iscsit_enable_svc(iscsit_hostinfo_t *hostinfo) 649a6d42e7dSPeter Dunlap { 650a6d42e7dSPeter Dunlap stmf_port_provider_t *pp; 651a6d42e7dSPeter Dunlap stmf_dbuf_store_t *dbuf_store; 652a6d42e7dSPeter Dunlap boolean_t did_iscsit_isns_init; 653a6d42e7dSPeter Dunlap idm_status_t retval = IDM_STATUS_SUCCESS; 654a6d42e7dSPeter Dunlap 655a6d42e7dSPeter Dunlap ASSERT(iscsit_global.global_svc_state == ISE_ENABLING); 656a6d42e7dSPeter Dunlap 657a6d42e7dSPeter Dunlap /* 658a6d42e7dSPeter Dunlap * Make sure that can tell if we have partially allocated 659a6d42e7dSPeter Dunlap * in case we need to exit and tear down anything allocated. 660a6d42e7dSPeter Dunlap */ 661a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = NULL; 662a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = NULL; 663a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = NULL; 664a6d42e7dSPeter Dunlap pp = NULL; 665a6d42e7dSPeter Dunlap iscsit_global.global_pp = NULL; 666a6d42e7dSPeter Dunlap iscsit_global.global_default_tpg = NULL; 667a6d42e7dSPeter Dunlap did_iscsit_isns_init = B_FALSE; 668a6d42e7dSPeter Dunlap iscsit_global.global_dispatch_taskq = NULL; 669a6d42e7dSPeter Dunlap 670a6d42e7dSPeter Dunlap /* Setup remaining fields in iscsit_global_t */ 671a6d42e7dSPeter Dunlap idm_refcnt_init(&iscsit_global.global_refcnt, 672a6d42e7dSPeter Dunlap &iscsit_global); 673a6d42e7dSPeter Dunlap 674a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_discovery_sessions, 675a6d42e7dSPeter Dunlap iscsit_sess_avl_compare, sizeof (iscsit_sess_t), 676a6d42e7dSPeter Dunlap offsetof(iscsit_sess_t, ist_tgt_ln)); 677a6d42e7dSPeter Dunlap 678a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_target_list, 679a6d42e7dSPeter Dunlap iscsit_tgt_avl_compare, sizeof (iscsit_tgt_t), 680a6d42e7dSPeter Dunlap offsetof(iscsit_tgt_t, target_global_ln)); 681a6d42e7dSPeter Dunlap 682a6d42e7dSPeter Dunlap list_create(&iscsit_global.global_deleted_target_list, 683a6d42e7dSPeter Dunlap sizeof (iscsit_tgt_t), 684a6d42e7dSPeter Dunlap offsetof(iscsit_tgt_t, target_global_deleted_ln)); 685a6d42e7dSPeter Dunlap 686a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_tpg_list, 687a6d42e7dSPeter Dunlap iscsit_tpg_avl_compare, sizeof (iscsit_tpg_t), 688a6d42e7dSPeter Dunlap offsetof(iscsit_tpg_t, tpg_global_ln)); 689a6d42e7dSPeter Dunlap 690a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_ini_list, 691a6d42e7dSPeter Dunlap iscsit_ini_avl_compare, sizeof (iscsit_ini_t), 692a6d42e7dSPeter Dunlap offsetof(iscsit_ini_t, ini_global_ln)); 693a6d42e7dSPeter Dunlap 694a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = vmem_create("iscsit_tsih_pool", 695a6d42e7dSPeter Dunlap (void *)1, ISCSI_MAX_TSIH, 1, NULL, NULL, NULL, 0, 696a6d42e7dSPeter Dunlap VM_SLEEP | VMC_IDENTIFIER); 697a6d42e7dSPeter Dunlap 698a6d42e7dSPeter Dunlap /* 699a6d42e7dSPeter Dunlap * Setup STMF dbuf store. Our buffers are bound to a specific 700a6d42e7dSPeter Dunlap * connection so we really can't let STMF cache buffers for us. 701a6d42e7dSPeter Dunlap * Consequently we'll just allocate one global buffer store. 702a6d42e7dSPeter Dunlap */ 703a6d42e7dSPeter Dunlap dbuf_store = stmf_alloc(STMF_STRUCT_DBUF_STORE, 0, 0); 704a6d42e7dSPeter Dunlap if (dbuf_store == NULL) { 705a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 706a6d42e7dSPeter Dunlap goto tear_down_and_return; 707a6d42e7dSPeter Dunlap } 708a6d42e7dSPeter Dunlap dbuf_store->ds_alloc_data_buf = iscsit_dbuf_alloc; 709a6d42e7dSPeter Dunlap dbuf_store->ds_free_data_buf = iscsit_dbuf_free; 710a6d42e7dSPeter Dunlap dbuf_store->ds_port_private = NULL; 711a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = dbuf_store; 712a6d42e7dSPeter Dunlap 713a6d42e7dSPeter Dunlap /* Status PDU cache */ 714a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = kmem_cache_create("iscsit_status_pdu_cache", 715a6d42e7dSPeter Dunlap sizeof (idm_pdu_t) + sizeof (iscsi_scsi_rsp_hdr_t), 8, 716a6d42e7dSPeter Dunlap &iscsit_status_pdu_constructor, 717a6d42e7dSPeter Dunlap NULL, NULL, NULL, NULL, KM_SLEEP); 718a6d42e7dSPeter Dunlap 719a6d42e7dSPeter Dunlap /* Default TPG and portal */ 720a6d42e7dSPeter Dunlap iscsit_global.global_default_tpg = iscsit_tpg_createdefault(); 721a6d42e7dSPeter Dunlap if (iscsit_global.global_default_tpg == NULL) { 722a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 723a6d42e7dSPeter Dunlap goto tear_down_and_return; 724a6d42e7dSPeter Dunlap } 725a6d42e7dSPeter Dunlap 726a6d42e7dSPeter Dunlap /* initialize isns client */ 727a6d42e7dSPeter Dunlap (void) iscsit_isns_init(hostinfo); 728a6d42e7dSPeter Dunlap did_iscsit_isns_init = B_TRUE; 729a6d42e7dSPeter Dunlap 730a6d42e7dSPeter Dunlap /* Register port provider */ 731a6d42e7dSPeter Dunlap pp = stmf_alloc(STMF_STRUCT_PORT_PROVIDER, 0, 0); 732a6d42e7dSPeter Dunlap if (pp == NULL) { 733a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 734a6d42e7dSPeter Dunlap goto tear_down_and_return; 735a6d42e7dSPeter Dunlap } 736a6d42e7dSPeter Dunlap 737a6d42e7dSPeter Dunlap pp->pp_portif_rev = PORTIF_REV_1; 738a6d42e7dSPeter Dunlap pp->pp_instance = 0; 739a6d42e7dSPeter Dunlap pp->pp_name = ISCSIT_MODNAME; 740a6d42e7dSPeter Dunlap pp->pp_cb = iscsit_pp_cb; 741a6d42e7dSPeter Dunlap 742a6d42e7dSPeter Dunlap iscsit_global.global_pp = pp; 743a6d42e7dSPeter Dunlap 744a6d42e7dSPeter Dunlap 745a6d42e7dSPeter Dunlap if (stmf_register_port_provider(pp) != STMF_SUCCESS) { 746a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 747a6d42e7dSPeter Dunlap goto tear_down_and_return; 748a6d42e7dSPeter Dunlap } 749a6d42e7dSPeter Dunlap 750a6d42e7dSPeter Dunlap iscsit_global.global_dispatch_taskq = taskq_create("iscsit_dispatch", 751a6d42e7dSPeter Dunlap 1, minclsyspri, 16, 16, TASKQ_PREPOPULATE); 752a6d42e7dSPeter Dunlap 753d618d68dSPriya Krishnan /* Scan staged PDUs, meaningful in MC/S situations */ 754d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_start(); 755d618d68dSPriya Krishnan 756a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 757a6d42e7dSPeter Dunlap 758a6d42e7dSPeter Dunlap tear_down_and_return: 759a6d42e7dSPeter Dunlap 760a6d42e7dSPeter Dunlap if (iscsit_global.global_dispatch_taskq) { 761a6d42e7dSPeter Dunlap taskq_destroy(iscsit_global.global_dispatch_taskq); 762a6d42e7dSPeter Dunlap iscsit_global.global_dispatch_taskq = NULL; 763a6d42e7dSPeter Dunlap } 764a6d42e7dSPeter Dunlap 765a6d42e7dSPeter Dunlap if (did_iscsit_isns_init) 766a6d42e7dSPeter Dunlap iscsit_isns_fini(); 767a6d42e7dSPeter Dunlap 768a6d42e7dSPeter Dunlap if (iscsit_global.global_default_tpg) { 769a6d42e7dSPeter Dunlap iscsit_tpg_destroydefault(iscsit_global.global_default_tpg); 770a6d42e7dSPeter Dunlap iscsit_global.global_default_tpg = NULL; 771a6d42e7dSPeter Dunlap } 772a6d42e7dSPeter Dunlap 773a6d42e7dSPeter Dunlap if (iscsit_global.global_pp) 774a6d42e7dSPeter Dunlap iscsit_global.global_pp = NULL; 775a6d42e7dSPeter Dunlap 776a6d42e7dSPeter Dunlap if (pp) 777a6d42e7dSPeter Dunlap stmf_free(pp); 778a6d42e7dSPeter Dunlap 779a6d42e7dSPeter Dunlap if (iscsit_status_pdu_cache) { 780a6d42e7dSPeter Dunlap kmem_cache_destroy(iscsit_status_pdu_cache); 781a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = NULL; 782a6d42e7dSPeter Dunlap } 783a6d42e7dSPeter Dunlap 784a6d42e7dSPeter Dunlap if (iscsit_global.global_dbuf_store) { 785a6d42e7dSPeter Dunlap stmf_free(iscsit_global.global_dbuf_store); 786a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = NULL; 787a6d42e7dSPeter Dunlap } 788a6d42e7dSPeter Dunlap 789a6d42e7dSPeter Dunlap if (iscsit_global.global_tsih_pool) { 790a6d42e7dSPeter Dunlap vmem_destroy(iscsit_global.global_tsih_pool); 791a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = NULL; 792a6d42e7dSPeter Dunlap } 793a6d42e7dSPeter Dunlap 794a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_ini_list); 795a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_tpg_list); 796a6d42e7dSPeter Dunlap list_destroy(&iscsit_global.global_deleted_target_list); 797a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_target_list); 798a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_discovery_sessions); 799a6d42e7dSPeter Dunlap 800a6d42e7dSPeter Dunlap idm_refcnt_destroy(&iscsit_global.global_refcnt); 801a6d42e7dSPeter Dunlap 802a6d42e7dSPeter Dunlap return (retval); 803a6d42e7dSPeter Dunlap } 804a6d42e7dSPeter Dunlap 805a6d42e7dSPeter Dunlap /* 806a6d42e7dSPeter Dunlap * iscsit_disable_svc 807a6d42e7dSPeter Dunlap * 808a6d42e7dSPeter Dunlap * clean up all existing connections and deregister targets from STMF 809a6d42e7dSPeter Dunlap */ 810a6d42e7dSPeter Dunlap static void 811a6d42e7dSPeter Dunlap iscsit_disable_svc(void) 812a6d42e7dSPeter Dunlap { 813a6d42e7dSPeter Dunlap iscsit_sess_t *sess; 814a6d42e7dSPeter Dunlap 815a6d42e7dSPeter Dunlap ASSERT(iscsit_global.global_svc_state == ISE_DISABLING); 816a6d42e7dSPeter Dunlap 817d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_stop(); 818d618d68dSPriya Krishnan 819a6d42e7dSPeter Dunlap /* tear down discovery sessions */ 820a6d42e7dSPeter Dunlap for (sess = avl_first(&iscsit_global.global_discovery_sessions); 821a6d42e7dSPeter Dunlap sess != NULL; 822a6d42e7dSPeter Dunlap sess = AVL_NEXT(&iscsit_global.global_discovery_sessions, sess)) 823a6d42e7dSPeter Dunlap iscsit_sess_close(sess); 824a6d42e7dSPeter Dunlap 825a6d42e7dSPeter Dunlap /* 826a6d42e7dSPeter Dunlap * Passing NULL to iscsit_config_merge tells it to go to an empty 827a6d42e7dSPeter Dunlap * config. 828a6d42e7dSPeter Dunlap */ 829a6d42e7dSPeter Dunlap (void) iscsit_config_merge(NULL); 830a6d42e7dSPeter Dunlap 831a6d42e7dSPeter Dunlap /* 832a6d42e7dSPeter Dunlap * Wait until there are no more global references 833a6d42e7dSPeter Dunlap */ 834a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&iscsit_global.global_refcnt); 835a6d42e7dSPeter Dunlap idm_refcnt_destroy(&iscsit_global.global_refcnt); 836a6d42e7dSPeter Dunlap 837a6d42e7dSPeter Dunlap /* 838a6d42e7dSPeter Dunlap * Default TPG must be destroyed after global_refcnt is 0. 839a6d42e7dSPeter Dunlap */ 840a6d42e7dSPeter Dunlap iscsit_tpg_destroydefault(iscsit_global.global_default_tpg); 841a6d42e7dSPeter Dunlap 842a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_discovery_sessions); 843a6d42e7dSPeter Dunlap list_destroy(&iscsit_global.global_deleted_target_list); 844a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_target_list); 845a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_tpg_list); 846a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_ini_list); 847a6d42e7dSPeter Dunlap 848a6d42e7dSPeter Dunlap taskq_destroy(iscsit_global.global_dispatch_taskq); 849a6d42e7dSPeter Dunlap 850a6d42e7dSPeter Dunlap iscsit_isns_fini(); 851a6d42e7dSPeter Dunlap 852a6d42e7dSPeter Dunlap stmf_free(iscsit_global.global_dbuf_store); 853a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = NULL; 854a6d42e7dSPeter Dunlap 855a6d42e7dSPeter Dunlap (void) stmf_deregister_port_provider(iscsit_global.global_pp); 856a6d42e7dSPeter Dunlap stmf_free(iscsit_global.global_pp); 857a6d42e7dSPeter Dunlap iscsit_global.global_pp = NULL; 858a6d42e7dSPeter Dunlap 859a6d42e7dSPeter Dunlap kmem_cache_destroy(iscsit_status_pdu_cache); 860a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = NULL; 861a6d42e7dSPeter Dunlap 862a6d42e7dSPeter Dunlap vmem_destroy(iscsit_global.global_tsih_pool); 863a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = NULL; 864a6d42e7dSPeter Dunlap } 865a6d42e7dSPeter Dunlap 866a6d42e7dSPeter Dunlap void 867a6d42e7dSPeter Dunlap iscsit_global_hold() 868a6d42e7dSPeter Dunlap { 8698c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* 8708c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * To take out a global hold, we must either own the global 8718c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * state mutex or we must be running inside of an ioctl that 8728c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * has set the global state to ISE_BUSY, ISE_DISABLING, or 8738c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * ISE_ENABLING. We don't track the "owner" for these flags, 8748c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * so just checking if they are set is enough for now. 8758c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States */ 8768c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT((iscsit_global.global_svc_state == ISE_ENABLING) || 8778c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States (iscsit_global.global_svc_state == ISE_DISABLING) || 8788c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States (iscsit_global.global_svc_state == ISE_BUSY) || 8798c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States MUTEX_HELD(&iscsit_global.global_state_mutex)); 8808c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 881a6d42e7dSPeter Dunlap idm_refcnt_hold(&iscsit_global.global_refcnt); 882a6d42e7dSPeter Dunlap } 883a6d42e7dSPeter Dunlap 884a6d42e7dSPeter Dunlap void 885a6d42e7dSPeter Dunlap iscsit_global_rele() 886a6d42e7dSPeter Dunlap { 887a6d42e7dSPeter Dunlap idm_refcnt_rele(&iscsit_global.global_refcnt); 888a6d42e7dSPeter Dunlap } 889a6d42e7dSPeter Dunlap 890a6d42e7dSPeter Dunlap void 891a6d42e7dSPeter Dunlap iscsit_global_wait_ref() 892a6d42e7dSPeter Dunlap { 893a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&iscsit_global.global_refcnt); 894a6d42e7dSPeter Dunlap } 895a6d42e7dSPeter Dunlap 896a6d42e7dSPeter Dunlap /* 897a6d42e7dSPeter Dunlap * IDM callbacks 898a6d42e7dSPeter Dunlap */ 899a6d42e7dSPeter Dunlap 900a6d42e7dSPeter Dunlap /*ARGSUSED*/ 901a6d42e7dSPeter Dunlap void 902a6d42e7dSPeter Dunlap iscsit_rx_pdu(idm_conn_t *ic, idm_pdu_t *rx_pdu) 903a6d42e7dSPeter Dunlap { 904a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 905a6d42e7dSPeter Dunlap switch (IDM_PDU_OPCODE(rx_pdu)) { 906a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_CMD: 907a6d42e7dSPeter Dunlap ASSERT(0); /* Shouldn't happen */ 908a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 909a6d42e7dSPeter Dunlap break; 910a6d42e7dSPeter Dunlap case ISCSI_OP_SNACK_CMD: 911a6d42e7dSPeter Dunlap /* 912a6d42e7dSPeter Dunlap * We'll need to handle this when we support ERL1/2. For 913a6d42e7dSPeter Dunlap * now we treat it as a protocol error. 914a6d42e7dSPeter Dunlap */ 915a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 916a6d42e7dSPeter Dunlap idm_conn_event(ic, CE_TRANSPORT_FAIL, NULL); 917a6d42e7dSPeter Dunlap break; 918a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_TASK_MGT_MSG: 919d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 920d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 921d618d68dSPriya Krishnan iscsit_op_scsi_task_mgmt(ict, rx_pdu); 922d618d68dSPriya Krishnan } 923a6d42e7dSPeter Dunlap break; 924a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_OUT: 925a6d42e7dSPeter Dunlap case ISCSI_OP_LOGIN_CMD: 926a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_CMD: 927a6d42e7dSPeter Dunlap case ISCSI_OP_LOGOUT_CMD: 928a6d42e7dSPeter Dunlap /* 929a6d42e7dSPeter Dunlap * If/when we switch to userland processing these PDU's 930a6d42e7dSPeter Dunlap * will be handled by iscsitd. 931a6d42e7dSPeter Dunlap */ 932a6d42e7dSPeter Dunlap iscsit_deferred_dispatch(rx_pdu); 933a6d42e7dSPeter Dunlap break; 934a6d42e7dSPeter Dunlap default: 935a6d42e7dSPeter Dunlap /* Protocol error */ 936a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 937a6d42e7dSPeter Dunlap idm_conn_event(ic, CE_TRANSPORT_FAIL, NULL); 938a6d42e7dSPeter Dunlap break; 939a6d42e7dSPeter Dunlap } 940a6d42e7dSPeter Dunlap } 941a6d42e7dSPeter Dunlap 942a6d42e7dSPeter Dunlap /*ARGSUSED*/ 943a6d42e7dSPeter Dunlap void 944a6d42e7dSPeter Dunlap iscsit_rx_pdu_error(idm_conn_t *ic, idm_pdu_t *rx_pdu, idm_status_t status) 945a6d42e7dSPeter Dunlap { 946a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 947a6d42e7dSPeter Dunlap } 948a6d42e7dSPeter Dunlap 949a6d42e7dSPeter Dunlap void 950a6d42e7dSPeter Dunlap iscsit_task_aborted(idm_task_t *idt, idm_status_t status) 951a6d42e7dSPeter Dunlap { 952a6d42e7dSPeter Dunlap iscsit_task_t *itask = idt->idt_private; 953a6d42e7dSPeter Dunlap 954a6d42e7dSPeter Dunlap switch (status) { 955a6d42e7dSPeter Dunlap case IDM_STATUS_SUSPENDED: 956a6d42e7dSPeter Dunlap break; 957a6d42e7dSPeter Dunlap case IDM_STATUS_ABORTED: 958a6d42e7dSPeter Dunlap mutex_enter(&itask->it_mutex); 959a6d42e7dSPeter Dunlap itask->it_aborted = B_TRUE; 960bf604c64SPeter Dunlap /* 961bf604c64SPeter Dunlap * We rely on the fact that STMF tracks outstanding 962bf604c64SPeter Dunlap * buffer transfers and will free all of our buffers 963bf604c64SPeter Dunlap * before freeing the task so we don't need to 964bf604c64SPeter Dunlap * explicitly free the buffers from iscsit/idm 965bf604c64SPeter Dunlap */ 966a6d42e7dSPeter Dunlap if (itask->it_stmf_abort) { 967a6d42e7dSPeter Dunlap mutex_exit(&itask->it_mutex); 96872cf3143Speter dunlap /* 96972cf3143Speter dunlap * Task is no longer active 97072cf3143Speter dunlap */ 97172cf3143Speter dunlap iscsit_task_done(itask); 97272cf3143Speter dunlap 973a6d42e7dSPeter Dunlap /* 974bf604c64SPeter Dunlap * STMF has already asked for this task to be aborted 975bf604c64SPeter Dunlap * 976a6d42e7dSPeter Dunlap * STMF specification is wrong... says to return 977a6d42e7dSPeter Dunlap * STMF_ABORTED, the code actually looks for 978a6d42e7dSPeter Dunlap * STMF_ABORT_SUCCESS. 979a6d42e7dSPeter Dunlap */ 980a6d42e7dSPeter Dunlap stmf_task_lport_aborted(itask->it_stmf_task, 981a6d42e7dSPeter Dunlap STMF_ABORT_SUCCESS, STMF_IOF_LPORT_DONE); 982a6d42e7dSPeter Dunlap return; 983a6d42e7dSPeter Dunlap } else { 984a6d42e7dSPeter Dunlap mutex_exit(&itask->it_mutex); 985a6d42e7dSPeter Dunlap /* 986bf604c64SPeter Dunlap * Tell STMF to stop processing the task. 987a6d42e7dSPeter Dunlap */ 988a6d42e7dSPeter Dunlap stmf_abort(STMF_QUEUE_TASK_ABORT, itask->it_stmf_task, 989a6d42e7dSPeter Dunlap STMF_ABORTED, NULL); 990a6d42e7dSPeter Dunlap return; 991a6d42e7dSPeter Dunlap } 992a6d42e7dSPeter Dunlap /*NOTREACHED*/ 993a6d42e7dSPeter Dunlap default: 994a6d42e7dSPeter Dunlap ASSERT(0); 995a6d42e7dSPeter Dunlap } 996a6d42e7dSPeter Dunlap } 997a6d42e7dSPeter Dunlap 998a6d42e7dSPeter Dunlap /*ARGSUSED*/ 999a6d42e7dSPeter Dunlap idm_status_t 1000a6d42e7dSPeter Dunlap iscsit_client_notify(idm_conn_t *ic, idm_client_notify_t icn, 1001a6d42e7dSPeter Dunlap uintptr_t data) 1002a6d42e7dSPeter Dunlap { 1003a6d42e7dSPeter Dunlap idm_status_t rc = IDM_STATUS_SUCCESS; 1004a6d42e7dSPeter Dunlap 1005a6d42e7dSPeter Dunlap /* 1006a6d42e7dSPeter Dunlap * IDM client notifications will never occur at interrupt level 1007a6d42e7dSPeter Dunlap * since they are generated from the connection state machine which 1008a6d42e7dSPeter Dunlap * running on taskq threads. 1009a6d42e7dSPeter Dunlap * 1010a6d42e7dSPeter Dunlap */ 1011a6d42e7dSPeter Dunlap switch (icn) { 1012a6d42e7dSPeter Dunlap case CN_CONNECT_ACCEPT: 1013a6d42e7dSPeter Dunlap rc = iscsit_conn_accept(ic); /* No data */ 1014a6d42e7dSPeter Dunlap break; 1015a6d42e7dSPeter Dunlap case CN_FFP_ENABLED: 1016a6d42e7dSPeter Dunlap rc = iscsit_ffp_enabled(ic); /* No data */ 1017a6d42e7dSPeter Dunlap break; 1018a6d42e7dSPeter Dunlap case CN_FFP_DISABLED: 1019a6d42e7dSPeter Dunlap /* 1020a6d42e7dSPeter Dunlap * Data indicates whether this was the result of an 1021a6d42e7dSPeter Dunlap * explicit logout request. 1022a6d42e7dSPeter Dunlap */ 1023a6d42e7dSPeter Dunlap rc = iscsit_ffp_disabled(ic, (idm_ffp_disable_t)data); 1024a6d42e7dSPeter Dunlap break; 1025a6d42e7dSPeter Dunlap case CN_CONNECT_LOST: 1026a6d42e7dSPeter Dunlap rc = iscsit_conn_lost(ic); 1027a6d42e7dSPeter Dunlap break; 1028a6d42e7dSPeter Dunlap case CN_CONNECT_DESTROY: 1029a6d42e7dSPeter Dunlap rc = iscsit_conn_destroy(ic); 1030a6d42e7dSPeter Dunlap break; 1031a6d42e7dSPeter Dunlap case CN_LOGIN_FAIL: 1032a6d42e7dSPeter Dunlap /* 1033a6d42e7dSPeter Dunlap * Force the login state machine to completion 1034a6d42e7dSPeter Dunlap */ 1035a6d42e7dSPeter Dunlap rc = iscsit_login_fail(ic); 1036a6d42e7dSPeter Dunlap break; 1037a6d42e7dSPeter Dunlap default: 1038a6d42e7dSPeter Dunlap rc = IDM_STATUS_REJECT; 1039a6d42e7dSPeter Dunlap break; 1040a6d42e7dSPeter Dunlap } 1041a6d42e7dSPeter Dunlap 1042a6d42e7dSPeter Dunlap return (rc); 1043a6d42e7dSPeter Dunlap } 1044a6d42e7dSPeter Dunlap 104560220f10SPriya Krishnan /* 104660220f10SPriya Krishnan * iscsit_update_statsn is invoked for all the PDUs which have the StatSN 104760220f10SPriya Krishnan * field in the header. The StatSN is incremented if the IDM_PDU_ADVANCE_STATSN 104860220f10SPriya Krishnan * flag is set in the pdu flags field. The StatSN is connection-wide and is 104960220f10SPriya Krishnan * protected by the mutex ict_statsn_mutex. For Data-In PDUs, if the flag 105060220f10SPriya Krishnan * IDM_TASK_PHASECOLLAPSE_REQ is set, the status (phase-collapse) is also filled 105160220f10SPriya Krishnan */ 105260220f10SPriya Krishnan void 105360220f10SPriya Krishnan iscsit_update_statsn(idm_task_t *idm_task, idm_pdu_t *pdu) 105460220f10SPriya Krishnan { 105560220f10SPriya Krishnan iscsi_scsi_rsp_hdr_t *rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 105660220f10SPriya Krishnan iscsit_conn_t *ict = (iscsit_conn_t *)pdu->isp_ic->ic_handle; 105760220f10SPriya Krishnan iscsit_task_t *itask = NULL; 105860220f10SPriya Krishnan scsi_task_t *task = NULL; 105960220f10SPriya Krishnan 106060220f10SPriya Krishnan mutex_enter(&ict->ict_statsn_mutex); 106160220f10SPriya Krishnan rsp->statsn = htonl(ict->ict_statsn); 106260220f10SPriya Krishnan if (pdu->isp_flags & IDM_PDU_ADVANCE_STATSN) 106360220f10SPriya Krishnan ict->ict_statsn++; 106460220f10SPriya Krishnan mutex_exit(&ict->ict_statsn_mutex); 106560220f10SPriya Krishnan 106660220f10SPriya Krishnan /* 106760220f10SPriya Krishnan * The last SCSI Data PDU passed for a command may also contain the 106860220f10SPriya Krishnan * status if the status indicates termination with no expections, i.e. 106960220f10SPriya Krishnan * no sense data or response involved. If the command completes with 107060220f10SPriya Krishnan * an error, then the response and sense data will be sent in a 107160220f10SPriya Krishnan * separate iSCSI Response PDU. 107260220f10SPriya Krishnan */ 107360220f10SPriya Krishnan if ((idm_task) && (idm_task->idt_flags & IDM_TASK_PHASECOLLAPSE_REQ)) { 107460220f10SPriya Krishnan itask = idm_task->idt_private; 107560220f10SPriya Krishnan task = itask->it_stmf_task; 107660220f10SPriya Krishnan 107760220f10SPriya Krishnan rsp->cmd_status = task->task_scsi_status; 107860220f10SPriya Krishnan rsp->flags |= ISCSI_FLAG_DATA_STATUS; 107960220f10SPriya Krishnan if (task->task_status_ctrl & TASK_SCTRL_OVER) { 108060220f10SPriya Krishnan rsp->flags |= ISCSI_FLAG_CMD_OVERFLOW; 108160220f10SPriya Krishnan } else if (task->task_status_ctrl & TASK_SCTRL_UNDER) { 108260220f10SPriya Krishnan rsp->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 108360220f10SPriya Krishnan } 108460220f10SPriya Krishnan rsp->residual_count = htonl(task->task_resid); 1085a2383ac5SPriya Krishnan 1086a2383ac5SPriya Krishnan /* 1087a2383ac5SPriya Krishnan * Removing the task from the session task list 1088a2383ac5SPriya Krishnan * just before the status is sent in the last 1089a2383ac5SPriya Krishnan * Data PDU transfer 1090a2383ac5SPriya Krishnan */ 1091a2383ac5SPriya Krishnan iscsit_task_done(itask); 109260220f10SPriya Krishnan } 109360220f10SPriya Krishnan } 1094a6d42e7dSPeter Dunlap 1095a6d42e7dSPeter Dunlap void 1096a6d42e7dSPeter Dunlap iscsit_build_hdr(idm_task_t *idm_task, idm_pdu_t *pdu, uint8_t opcode) 1097a6d42e7dSPeter Dunlap { 1098a6d42e7dSPeter Dunlap iscsit_task_t *itask = idm_task->idt_private; 1099a6d42e7dSPeter Dunlap iscsi_data_rsp_hdr_t *dh = (iscsi_data_rsp_hdr_t *)pdu->isp_hdr; 1100a6d42e7dSPeter Dunlap 1101a6d42e7dSPeter Dunlap /* 1102d618d68dSPriya Krishnan * We acquired iscsit_sess_t.ist_sn_mutex in iscsit_xfer_scsi_data 1103a6d42e7dSPeter Dunlap */ 1104d618d68dSPriya Krishnan ASSERT(MUTEX_HELD(&itask->it_ict->ict_sess->ist_sn_mutex)); 1105a6d42e7dSPeter Dunlap /* 110674f49fd4SPriya Krishnan * On incoming data, the target transfer tag and Lun is only 110774f49fd4SPriya Krishnan * provided by the target if the A bit is set, Since the target 110874f49fd4SPriya Krishnan * does not currently support Error Recovery Level 1, the A 110974f49fd4SPriya Krishnan * bit is never set. 1110a6d42e7dSPeter Dunlap */ 1111a6d42e7dSPeter Dunlap dh->opcode = opcode; 1112a6d42e7dSPeter Dunlap dh->itt = itask->it_itt; 111374f49fd4SPriya Krishnan dh->ttt = ((opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_SCSI_DATA_RSP) ? 111474f49fd4SPriya Krishnan ISCSI_RSVD_TASK_TAG : itask->it_ttt; 111560220f10SPriya Krishnan 1116a6d42e7dSPeter Dunlap dh->expcmdsn = htonl(itask->it_ict->ict_sess->ist_expcmdsn); 1117a6d42e7dSPeter Dunlap dh->maxcmdsn = htonl(itask->it_ict->ict_sess->ist_maxcmdsn); 1118a6d42e7dSPeter Dunlap 1119a6d42e7dSPeter Dunlap /* 1120a6d42e7dSPeter Dunlap * IDM must set: 1121a6d42e7dSPeter Dunlap * 1122a6d42e7dSPeter Dunlap * data.flags and rtt.flags 1123a6d42e7dSPeter Dunlap * data.dlength 1124a6d42e7dSPeter Dunlap * data.datasn 1125a6d42e7dSPeter Dunlap * data.offset 112660220f10SPriya Krishnan * statsn, residual_count and cmd_status (for phase collapse) 1127a6d42e7dSPeter Dunlap * rtt.rttsn 1128a6d42e7dSPeter Dunlap * rtt.data_offset 1129a6d42e7dSPeter Dunlap * rtt.data_length 1130a6d42e7dSPeter Dunlap */ 1131a6d42e7dSPeter Dunlap } 1132a6d42e7dSPeter Dunlap 113372cf3143Speter dunlap void 113472cf3143Speter dunlap iscsit_keepalive(idm_conn_t *ic) 113572cf3143Speter dunlap { 113672cf3143Speter dunlap idm_pdu_t *nop_in_pdu; 113772cf3143Speter dunlap iscsi_nop_in_hdr_t *nop_in; 113872cf3143Speter dunlap iscsit_conn_t *ict = ic->ic_handle; 113972cf3143Speter dunlap 114072cf3143Speter dunlap /* 114172cf3143Speter dunlap * IDM noticed the connection has been idle for too long so it's 114272cf3143Speter dunlap * time to provoke some activity. Build and transmit an iSCSI 114372cf3143Speter dunlap * nop-in PDU -- when the initiator responds it will be counted 114472cf3143Speter dunlap * as "activity" and keep the connection alive. 114572cf3143Speter dunlap * 114672cf3143Speter dunlap * We don't actually care about the response here at the iscsit level 114772cf3143Speter dunlap * so we will just throw it away without looking at it when it arrives. 114872cf3143Speter dunlap */ 114972cf3143Speter dunlap nop_in_pdu = idm_pdu_alloc(sizeof (*nop_in), 0); 115072cf3143Speter dunlap idm_pdu_init(nop_in_pdu, ic, NULL, NULL); 115172cf3143Speter dunlap nop_in = (iscsi_nop_in_hdr_t *)nop_in_pdu->isp_hdr; 115272cf3143Speter dunlap bzero(nop_in, sizeof (*nop_in)); 115372cf3143Speter dunlap nop_in->opcode = ISCSI_OP_NOOP_IN; 115472cf3143Speter dunlap nop_in->flags = ISCSI_FLAG_FINAL; 115572cf3143Speter dunlap nop_in->itt = ISCSI_RSVD_TASK_TAG; 115660220f10SPriya Krishnan /* 115760220f10SPriya Krishnan * When the target sends a NOP-In as a Ping, the target transfer tag 115860220f10SPriya Krishnan * is set to a valid (not reserved) value and the initiator task tag 115960220f10SPriya Krishnan * is set to ISCSI_RSVD_TASK_TAG (0xffffffff). In this case the StatSN 116060220f10SPriya Krishnan * will always contain the next sequence number but the StatSN for the 116160220f10SPriya Krishnan * connection is not advanced after this PDU is sent. 116260220f10SPriya Krishnan */ 116360220f10SPriya Krishnan nop_in_pdu->isp_flags |= IDM_PDU_SET_STATSN; 116472cf3143Speter dunlap /* 116572cf3143Speter dunlap * This works because we don't currently allocate ttt's anywhere else 116672cf3143Speter dunlap * in iscsit so as long as we stay out of IDM's range we are safe. 116772cf3143Speter dunlap * If we need to allocate ttt's for other PDU's in the future this will 116872cf3143Speter dunlap * need to be improved. 116972cf3143Speter dunlap */ 117072cf3143Speter dunlap mutex_enter(&ict->ict_mutex); 117172cf3143Speter dunlap nop_in->ttt = ict->ict_keepalive_ttt; 117272cf3143Speter dunlap ict->ict_keepalive_ttt++; 117372cf3143Speter dunlap if (ict->ict_keepalive_ttt == ISCSI_RSVD_TASK_TAG) 117472cf3143Speter dunlap ict->ict_keepalive_ttt = IDM_TASKIDS_MAX; 117572cf3143Speter dunlap mutex_exit(&ict->ict_mutex); 117672cf3143Speter dunlap 117772cf3143Speter dunlap iscsit_pdu_tx(nop_in_pdu); 117872cf3143Speter dunlap } 117972cf3143Speter dunlap 1180a6d42e7dSPeter Dunlap static idm_status_t 1181a6d42e7dSPeter Dunlap iscsit_conn_accept(idm_conn_t *ic) 1182a6d42e7dSPeter Dunlap { 1183a6d42e7dSPeter Dunlap iscsit_conn_t *ict; 1184a6d42e7dSPeter Dunlap 118530e7468fSPeter Dunlap /* 118630e7468fSPeter Dunlap * We need to get a global hold here to ensure that the service 118730e7468fSPeter Dunlap * doesn't get shutdown prior to establishing a session. This 118830e7468fSPeter Dunlap * gets released in iscsit_conn_destroy(). 118930e7468fSPeter Dunlap */ 11908c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 1191e42a0851Speter dunlap if (iscsit_global.global_svc_state != ISE_ENABLED) { 11928c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 1193e42a0851Speter dunlap return (IDM_STATUS_FAIL); 1194e42a0851Speter dunlap } 119530e7468fSPeter Dunlap iscsit_global_hold(); 11968c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 119730e7468fSPeter Dunlap 1198a6d42e7dSPeter Dunlap /* 1199a6d42e7dSPeter Dunlap * Allocate an associated iscsit structure to represent this 1200a6d42e7dSPeter Dunlap * connection. We shouldn't really create a session until we 1201a6d42e7dSPeter Dunlap * get the first login PDU. 1202a6d42e7dSPeter Dunlap */ 1203a6d42e7dSPeter Dunlap ict = kmem_zalloc(sizeof (*ict), KM_SLEEP); 1204a6d42e7dSPeter Dunlap 1205a6d42e7dSPeter Dunlap ict->ict_ic = ic; 1206a6d42e7dSPeter Dunlap ict->ict_statsn = 1; 120772cf3143Speter dunlap ict->ict_keepalive_ttt = IDM_TASKIDS_MAX; /* Avoid IDM TT range */ 1208a6d42e7dSPeter Dunlap ic->ic_handle = ict; 1209a6d42e7dSPeter Dunlap mutex_init(&ict->ict_mutex, NULL, MUTEX_DRIVER, NULL); 121060220f10SPriya Krishnan mutex_init(&ict->ict_statsn_mutex, NULL, MUTEX_DRIVER, NULL); 1211a6d42e7dSPeter Dunlap idm_refcnt_init(&ict->ict_refcnt, ict); 1212a6d42e7dSPeter Dunlap 1213a6d42e7dSPeter Dunlap /* 1214a6d42e7dSPeter Dunlap * Initialize login state machine 1215a6d42e7dSPeter Dunlap */ 1216a6d42e7dSPeter Dunlap if (iscsit_login_sm_init(ict) != IDM_STATUS_SUCCESS) { 1217e42a0851Speter dunlap iscsit_global_rele(); 12184142b486SJames Moore /* 12194142b486SJames Moore * Cleanup the ict after idm notifies us about this failure 12204142b486SJames Moore */ 1221a6d42e7dSPeter Dunlap return (IDM_STATUS_FAIL); 1222a6d42e7dSPeter Dunlap } 1223a6d42e7dSPeter Dunlap 1224a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1225a6d42e7dSPeter Dunlap } 1226a6d42e7dSPeter Dunlap 1227a6d42e7dSPeter Dunlap idm_status_t 1228a6d42e7dSPeter Dunlap iscsit_conn_reinstate(iscsit_conn_t *reinstate_ict, iscsit_conn_t *new_ict) 1229a6d42e7dSPeter Dunlap { 1230a6d42e7dSPeter Dunlap idm_status_t result; 1231a6d42e7dSPeter Dunlap 1232a6d42e7dSPeter Dunlap /* 1233a6d42e7dSPeter Dunlap * Note in new connection state that this connection is 1234a6d42e7dSPeter Dunlap * reinstating an existing connection. 1235a6d42e7dSPeter Dunlap */ 1236a6d42e7dSPeter Dunlap new_ict->ict_reinstating = B_TRUE; 1237a6d42e7dSPeter Dunlap new_ict->ict_reinstate_conn = reinstate_ict; 1238a6d42e7dSPeter Dunlap new_ict->ict_statsn = reinstate_ict->ict_statsn; 1239a6d42e7dSPeter Dunlap 1240a6d42e7dSPeter Dunlap /* 1241a6d42e7dSPeter Dunlap * Now generate connection state machine event to existing connection 1242a6d42e7dSPeter Dunlap * so that it starts the cleanup process. 1243a6d42e7dSPeter Dunlap */ 1244a6d42e7dSPeter Dunlap result = idm_conn_reinstate_event(reinstate_ict->ict_ic, 1245a6d42e7dSPeter Dunlap new_ict->ict_ic); 1246a6d42e7dSPeter Dunlap 1247a6d42e7dSPeter Dunlap return (result); 1248a6d42e7dSPeter Dunlap } 1249a6d42e7dSPeter Dunlap 1250a6d42e7dSPeter Dunlap void 1251a6d42e7dSPeter Dunlap iscsit_conn_hold(iscsit_conn_t *ict) 1252a6d42e7dSPeter Dunlap { 1253a6d42e7dSPeter Dunlap idm_refcnt_hold(&ict->ict_refcnt); 1254a6d42e7dSPeter Dunlap } 1255a6d42e7dSPeter Dunlap 1256a6d42e7dSPeter Dunlap void 1257a6d42e7dSPeter Dunlap iscsit_conn_rele(iscsit_conn_t *ict) 1258a6d42e7dSPeter Dunlap { 1259a6d42e7dSPeter Dunlap idm_refcnt_rele(&ict->ict_refcnt); 1260a6d42e7dSPeter Dunlap } 1261a6d42e7dSPeter Dunlap 1262a6d42e7dSPeter Dunlap void 1263a6d42e7dSPeter Dunlap iscsit_conn_dispatch_hold(iscsit_conn_t *ict) 1264a6d42e7dSPeter Dunlap { 1265a6d42e7dSPeter Dunlap idm_refcnt_hold(&ict->ict_dispatch_refcnt); 1266a6d42e7dSPeter Dunlap } 1267a6d42e7dSPeter Dunlap 1268a6d42e7dSPeter Dunlap void 1269a6d42e7dSPeter Dunlap iscsit_conn_dispatch_rele(iscsit_conn_t *ict) 1270a6d42e7dSPeter Dunlap { 1271a6d42e7dSPeter Dunlap idm_refcnt_rele(&ict->ict_dispatch_refcnt); 1272a6d42e7dSPeter Dunlap } 1273a6d42e7dSPeter Dunlap 1274a6d42e7dSPeter Dunlap static idm_status_t 1275a6d42e7dSPeter Dunlap iscsit_login_fail(idm_conn_t *ic) 1276a6d42e7dSPeter Dunlap { 1277a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1278a6d42e7dSPeter Dunlap 1279a6d42e7dSPeter Dunlap /* Generate login state machine event */ 1280a6d42e7dSPeter Dunlap iscsit_login_sm_event(ict, ILE_LOGIN_CONN_ERROR, NULL); 1281a6d42e7dSPeter Dunlap 1282a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1283a6d42e7dSPeter Dunlap } 1284a6d42e7dSPeter Dunlap 1285a6d42e7dSPeter Dunlap static idm_status_t 1286a6d42e7dSPeter Dunlap iscsit_ffp_enabled(idm_conn_t *ic) 1287a6d42e7dSPeter Dunlap { 1288a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1289a6d42e7dSPeter Dunlap 1290a6d42e7dSPeter Dunlap /* Generate session state machine event */ 1291a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_LOGGED_IN, ict); 1292a6d42e7dSPeter Dunlap 1293a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1294a6d42e7dSPeter Dunlap } 1295a6d42e7dSPeter Dunlap 1296a6d42e7dSPeter Dunlap static idm_status_t 1297a6d42e7dSPeter Dunlap iscsit_ffp_disabled(idm_conn_t *ic, idm_ffp_disable_t disable_class) 1298a6d42e7dSPeter Dunlap { 1299a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1300a6d42e7dSPeter Dunlap 1301a6d42e7dSPeter Dunlap /* Generate session state machine event */ 1302a6d42e7dSPeter Dunlap switch (disable_class) { 1303a6d42e7dSPeter Dunlap case FD_CONN_FAIL: 1304a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_FFP_FAIL, ict); 1305a6d42e7dSPeter Dunlap break; 1306a6d42e7dSPeter Dunlap case FD_CONN_LOGOUT: 1307a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_FFP_DISABLE, ict); 1308a6d42e7dSPeter Dunlap break; 1309a6d42e7dSPeter Dunlap case FD_SESS_LOGOUT: 1310a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_SESSION_CLOSE, ict); 1311a6d42e7dSPeter Dunlap break; 1312a6d42e7dSPeter Dunlap default: 1313a6d42e7dSPeter Dunlap ASSERT(0); 1314a6d42e7dSPeter Dunlap } 1315a6d42e7dSPeter Dunlap 1316a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1317a6d42e7dSPeter Dunlap } 1318a6d42e7dSPeter Dunlap 1319a6d42e7dSPeter Dunlap static idm_status_t 1320a6d42e7dSPeter Dunlap iscsit_conn_lost(idm_conn_t *ic) 1321a6d42e7dSPeter Dunlap { 1322d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 1323d618d68dSPriya Krishnan iscsit_sess_t *ist = ict->ict_sess; 1324d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf; 1325d618d68dSPriya Krishnan idm_pdu_t *rx_pdu; 1326d618d68dSPriya Krishnan int i; 1327a6d42e7dSPeter Dunlap 1328a6d42e7dSPeter Dunlap mutex_enter(&ict->ict_mutex); 1329a6d42e7dSPeter Dunlap ict->ict_lost = B_TRUE; 1330a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 1331d618d68dSPriya Krishnan /* 1332d618d68dSPriya Krishnan * scrub the staging queue for all PDUs on this connection 1333d618d68dSPriya Krishnan */ 1334d618d68dSPriya Krishnan if (ist != NULL) { 1335d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 1336d618d68dSPriya Krishnan for (cbuf = ist->ist_rxpdu_queue, i = 0; 1337d618d68dSPriya Krishnan ((cbuf->cb_num_elems > 0) && (i < ISCSIT_RXPDU_QUEUE_LEN)); 1338d618d68dSPriya Krishnan i++) { 1339d618d68dSPriya Krishnan if (((rx_pdu = cbuf->cb_buffer[i]) != NULL) && 1340d618d68dSPriya Krishnan (rx_pdu->isp_ic == ic)) { 1341d618d68dSPriya Krishnan /* conn is lost, drop the pdu */ 1342d618d68dSPriya Krishnan DTRACE_PROBE3(scrubbing__staging__queue, 1343d618d68dSPriya Krishnan iscsit_sess_t *, ist, idm_conn_t *, ic, 1344d618d68dSPriya Krishnan idm_pdu_t *, rx_pdu); 1345d618d68dSPriya Krishnan idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 1346d618d68dSPriya Krishnan cbuf->cb_buffer[i] = NULL; 1347d618d68dSPriya Krishnan cbuf->cb_num_elems--; 1348d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); 1349d618d68dSPriya Krishnan } 1350d618d68dSPriya Krishnan } 1351d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 1352d618d68dSPriya Krishnan } 1353a6d42e7dSPeter Dunlap /* 1354a6d42e7dSPeter Dunlap * Make sure there aren't any PDU's transitioning from the receive 1355a6d42e7dSPeter Dunlap * handler to the dispatch taskq. 1356a6d42e7dSPeter Dunlap */ 1357a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&ict->ict_dispatch_refcnt); 1358a6d42e7dSPeter Dunlap 1359a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1360a6d42e7dSPeter Dunlap } 1361a6d42e7dSPeter Dunlap 1362a6d42e7dSPeter Dunlap static idm_status_t 1363a6d42e7dSPeter Dunlap iscsit_conn_destroy(idm_conn_t *ic) 1364a6d42e7dSPeter Dunlap { 1365a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1366a6d42e7dSPeter Dunlap 1367a6d42e7dSPeter Dunlap mutex_enter(&ict->ict_mutex); 1368a6d42e7dSPeter Dunlap ict->ict_destroyed = B_TRUE; 1369a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 1370a6d42e7dSPeter Dunlap 1371a6d42e7dSPeter Dunlap /* Generate session state machine event */ 1372a6d42e7dSPeter Dunlap if (ict->ict_sess != NULL) { 1373a6d42e7dSPeter Dunlap /* 1374a6d42e7dSPeter Dunlap * Session state machine will call iscsit_conn_destroy_done() 1375a6d42e7dSPeter Dunlap * when it has removed references to this connection. 1376a6d42e7dSPeter Dunlap */ 1377a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_FAIL, ict); 1378a6d42e7dSPeter Dunlap } 1379a6d42e7dSPeter Dunlap 1380a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&ict->ict_refcnt); 138147715e7fSPriya Krishnan /* 138247715e7fSPriya Krishnan * The session state machine does not need to post 138347715e7fSPriya Krishnan * events to IDM any longer, so it is safe to set 138447715e7fSPriya Krishnan * the idm connection reference to NULL 138547715e7fSPriya Krishnan */ 138647715e7fSPriya Krishnan ict->ict_ic = NULL; 1387a6d42e7dSPeter Dunlap 13884142b486SJames Moore /* Reap the login state machine */ 13894142b486SJames Moore iscsit_login_sm_fini(ict); 13904142b486SJames Moore 13914142b486SJames Moore /* Clean up any text command remnants */ 13924142b486SJames Moore iscsit_text_cmd_fini(ict); 13934142b486SJames Moore 1394a6d42e7dSPeter Dunlap mutex_destroy(&ict->ict_mutex); 1395a6d42e7dSPeter Dunlap idm_refcnt_destroy(&ict->ict_refcnt); 1396a6d42e7dSPeter Dunlap kmem_free(ict, sizeof (*ict)); 1397a6d42e7dSPeter Dunlap 139830e7468fSPeter Dunlap iscsit_global_rele(); 139930e7468fSPeter Dunlap 1400a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1401a6d42e7dSPeter Dunlap } 1402a6d42e7dSPeter Dunlap 140347715e7fSPriya Krishnan void 140447715e7fSPriya Krishnan iscsit_conn_logout(iscsit_conn_t *ict) 140547715e7fSPriya Krishnan { 140647715e7fSPriya Krishnan /* 140747715e7fSPriya Krishnan * If the iscsi connection is active, then 140847715e7fSPriya Krishnan * logout the IDM connection by sending a 140947715e7fSPriya Krishnan * CE_LOGOUT_SESSION_SUCCESS, else, no action 141047715e7fSPriya Krishnan * needs to be taken because the connection 141147715e7fSPriya Krishnan * is already in the teardown process. 141247715e7fSPriya Krishnan */ 141347715e7fSPriya Krishnan mutex_enter(&ict->ict_mutex); 141447715e7fSPriya Krishnan if (ict->ict_lost == B_FALSE && ict->ict_destroyed == B_FALSE) { 141547715e7fSPriya Krishnan idm_conn_event(ict->ict_ic, CE_LOGOUT_SESSION_SUCCESS, NULL); 141647715e7fSPriya Krishnan } 141747715e7fSPriya Krishnan mutex_exit(&ict->ict_mutex); 141847715e7fSPriya Krishnan } 141947715e7fSPriya Krishnan 1420a6d42e7dSPeter Dunlap /* 1421a6d42e7dSPeter Dunlap * STMF-related functions 1422a6d42e7dSPeter Dunlap * 1423a6d42e7dSPeter Dunlap * iSCSI to STMF mapping 1424a6d42e7dSPeter Dunlap * 1425a6d42e7dSPeter Dunlap * Session == ? 1426a6d42e7dSPeter Dunlap * Connection == bound to local port but not itself a local port 1427a6d42e7dSPeter Dunlap * Target 1428a6d42e7dSPeter Dunlap * Target portal (group?) == local port (really but we're not going to do this) 1429a6d42e7dSPeter Dunlap * iscsit needs to map connections to local ports (whatever we decide 1430a6d42e7dSPeter Dunlap * they are) 1431a6d42e7dSPeter Dunlap * Target == ? 1432a6d42e7dSPeter Dunlap */ 1433a6d42e7dSPeter Dunlap 1434a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1435a6d42e7dSPeter Dunlap static stmf_data_buf_t * 1436a6d42e7dSPeter Dunlap iscsit_dbuf_alloc(scsi_task_t *task, uint32_t size, uint32_t *pminsize, 1437a6d42e7dSPeter Dunlap uint32_t flags) 1438a6d42e7dSPeter Dunlap { 1439a6d42e7dSPeter Dunlap iscsit_task_t *itask = task->task_port_private; 1440a6d42e7dSPeter Dunlap idm_buf_t *idm_buffer; 1441a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf; 1442a6d42e7dSPeter Dunlap stmf_data_buf_t *result; 144326ec4a22SPriya Krishnan uint32_t bsize; 1444a6d42e7dSPeter Dunlap 1445a6d42e7dSPeter Dunlap /* 144601c0a610SPriya Krishnan * If the requested size is larger than MaxBurstLength and the 144701c0a610SPriya Krishnan * given pminsize is also larger than MaxBurstLength, then the 144801c0a610SPriya Krishnan * allocation fails (dbuf = NULL) and pminsize is modified to 144901c0a610SPriya Krishnan * be equal to MaxBurstLength. stmf/sbd then should re-invoke 145001c0a610SPriya Krishnan * this function with the corrected values for transfer. 1451a6d42e7dSPeter Dunlap */ 145226ec4a22SPriya Krishnan ASSERT(pminsize); 145301c0a610SPriya Krishnan if (size <= itask->it_ict->ict_op.op_max_burst_length) { 145401c0a610SPriya Krishnan bsize = size; 145501c0a610SPriya Krishnan } else if (*pminsize <= itask->it_ict->ict_op.op_max_burst_length) { 145601c0a610SPriya Krishnan bsize = itask->it_ict->ict_op.op_max_burst_length; 145701c0a610SPriya Krishnan } else { 1458a6d42e7dSPeter Dunlap *pminsize = itask->it_ict->ict_op.op_max_burst_length; 1459a6d42e7dSPeter Dunlap return (NULL); 1460a6d42e7dSPeter Dunlap } 1461a6d42e7dSPeter Dunlap 1462a6d42e7dSPeter Dunlap /* Alloc buffer */ 146326ec4a22SPriya Krishnan idm_buffer = idm_buf_alloc(itask->it_ict->ict_ic, NULL, bsize); 1464a6d42e7dSPeter Dunlap if (idm_buffer != NULL) { 1465a6d42e7dSPeter Dunlap result = stmf_alloc(STMF_STRUCT_DATA_BUF, 1466a6d42e7dSPeter Dunlap sizeof (iscsit_buf_t), 0); 1467a6d42e7dSPeter Dunlap if (result != NULL) { 1468a6d42e7dSPeter Dunlap /* Fill in stmf_data_buf_t */ 1469a6d42e7dSPeter Dunlap ibuf = result->db_port_private; 1470a6d42e7dSPeter Dunlap ibuf->ibuf_idm_buf = idm_buffer; 1471a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf = result; 1472a6d42e7dSPeter Dunlap ibuf->ibuf_is_immed = B_FALSE; 1473a6d42e7dSPeter Dunlap result->db_flags = DB_DONT_CACHE; 147426ec4a22SPriya Krishnan result->db_buf_size = bsize; 147526ec4a22SPriya Krishnan result->db_data_size = bsize; 1476a6d42e7dSPeter Dunlap result->db_sglist_length = 1; 1477a6d42e7dSPeter Dunlap result->db_sglist[0].seg_addr = idm_buffer->idb_buf; 1478a6d42e7dSPeter Dunlap result->db_sglist[0].seg_length = 1479a6d42e7dSPeter Dunlap idm_buffer->idb_buflen; 1480a6d42e7dSPeter Dunlap return (result); 1481a6d42e7dSPeter Dunlap } 1482a6d42e7dSPeter Dunlap 1483a6d42e7dSPeter Dunlap /* Couldn't get the stmf_data_buf_t so free the buffer */ 1484a6d42e7dSPeter Dunlap idm_buf_free(idm_buffer); 1485a6d42e7dSPeter Dunlap } 1486a6d42e7dSPeter Dunlap 1487a6d42e7dSPeter Dunlap return (NULL); 1488a6d42e7dSPeter Dunlap } 1489a6d42e7dSPeter Dunlap 1490a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1491a6d42e7dSPeter Dunlap static void 1492a6d42e7dSPeter Dunlap iscsit_dbuf_free(stmf_dbuf_store_t *ds, stmf_data_buf_t *dbuf) 1493a6d42e7dSPeter Dunlap { 1494a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf = dbuf->db_port_private; 1495a6d42e7dSPeter Dunlap 1496a6d42e7dSPeter Dunlap if (ibuf->ibuf_is_immed) { 1497a6d42e7dSPeter Dunlap /* 1498a6d42e7dSPeter Dunlap * The iscsit_buf_t structure itself will be freed with its 1499a6d42e7dSPeter Dunlap * associated task. Here we just need to free the PDU that 1500a6d42e7dSPeter Dunlap * held the immediate data. 1501a6d42e7dSPeter Dunlap */ 1502a6d42e7dSPeter Dunlap idm_pdu_complete(ibuf->ibuf_immed_data_pdu, IDM_STATUS_SUCCESS); 1503a6d42e7dSPeter Dunlap ibuf->ibuf_immed_data_pdu = 0; 1504a6d42e7dSPeter Dunlap } else { 1505a6d42e7dSPeter Dunlap idm_buf_free(ibuf->ibuf_idm_buf); 1506a6d42e7dSPeter Dunlap stmf_free(dbuf); 1507a6d42e7dSPeter Dunlap } 1508a6d42e7dSPeter Dunlap } 1509a6d42e7dSPeter Dunlap 1510a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1511a6d42e7dSPeter Dunlap stmf_status_t 1512a6d42e7dSPeter Dunlap iscsit_xfer_scsi_data(scsi_task_t *task, stmf_data_buf_t *dbuf, 1513a6d42e7dSPeter Dunlap uint32_t ioflags) 1514a6d42e7dSPeter Dunlap { 1515a6d42e7dSPeter Dunlap iscsit_task_t *iscsit_task = task->task_port_private; 151660220f10SPriya Krishnan iscsit_sess_t *ict_sess = iscsit_task->it_ict->ict_sess; 1517a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf = dbuf->db_port_private; 1518a6d42e7dSPeter Dunlap int idm_rc; 1519a6d42e7dSPeter Dunlap 1520bf604c64SPeter Dunlap /* 1521bf604c64SPeter Dunlap * If we are aborting then we can ignore this request 1522bf604c64SPeter Dunlap */ 1523bf604c64SPeter Dunlap if (iscsit_task->it_stmf_abort) { 1524bf604c64SPeter Dunlap return (STMF_SUCCESS); 1525bf604c64SPeter Dunlap } 1526bf604c64SPeter Dunlap 1527a6d42e7dSPeter Dunlap /* 1528a6d42e7dSPeter Dunlap * If it's not immediate data then start the transfer 1529a6d42e7dSPeter Dunlap */ 1530a6d42e7dSPeter Dunlap ASSERT(ibuf->ibuf_is_immed == B_FALSE); 1531a6d42e7dSPeter Dunlap if (dbuf->db_flags & DB_DIRECTION_TO_RPORT) { 153260220f10SPriya Krishnan /* 153360220f10SPriya Krishnan * The DB_SEND_STATUS_GOOD flag in the STMF data buffer allows 153460220f10SPriya Krishnan * the port provider to phase-collapse, i.e. send the status 153560220f10SPriya Krishnan * along with the final data PDU for the command. The port 153660220f10SPriya Krishnan * provider passes this request to the transport layer by 153760220f10SPriya Krishnan * setting a flag IDM_TASK_PHASECOLLAPSE_REQ in the task. 153860220f10SPriya Krishnan */ 153960220f10SPriya Krishnan if (dbuf->db_flags & DB_SEND_STATUS_GOOD) 154060220f10SPriya Krishnan iscsit_task->it_idm_task->idt_flags |= 154160220f10SPriya Krishnan IDM_TASK_PHASECOLLAPSE_REQ; 1542a6d42e7dSPeter Dunlap /* 1543a6d42e7dSPeter Dunlap * IDM will call iscsit_build_hdr so lock now to serialize 1544a6d42e7dSPeter Dunlap * access to the SN values. We need to lock here to enforce 1545a6d42e7dSPeter Dunlap * lock ordering 1546a6d42e7dSPeter Dunlap */ 1547d618d68dSPriya Krishnan mutex_enter(&ict_sess->ist_sn_mutex); 1548a6d42e7dSPeter Dunlap idm_rc = idm_buf_tx_to_ini(iscsit_task->it_idm_task, 1549a6d42e7dSPeter Dunlap ibuf->ibuf_idm_buf, dbuf->db_relative_offset, 1550a6d42e7dSPeter Dunlap dbuf->db_data_size, &iscsit_buf_xfer_cb, dbuf); 1551d618d68dSPriya Krishnan mutex_exit(&ict_sess->ist_sn_mutex); 1552a6d42e7dSPeter Dunlap 1553a6d42e7dSPeter Dunlap return (iscsit_idm_to_stmf(idm_rc)); 1554a6d42e7dSPeter Dunlap } else if (dbuf->db_flags & DB_DIRECTION_FROM_RPORT) { 1555a6d42e7dSPeter Dunlap /* Grab the SN lock (see comment above) */ 1556d618d68dSPriya Krishnan mutex_enter(&ict_sess->ist_sn_mutex); 1557a6d42e7dSPeter Dunlap idm_rc = idm_buf_rx_from_ini(iscsit_task->it_idm_task, 1558a6d42e7dSPeter Dunlap ibuf->ibuf_idm_buf, dbuf->db_relative_offset, 1559a6d42e7dSPeter Dunlap dbuf->db_data_size, &iscsit_buf_xfer_cb, dbuf); 1560d618d68dSPriya Krishnan mutex_exit(&ict_sess->ist_sn_mutex); 1561a6d42e7dSPeter Dunlap 1562a6d42e7dSPeter Dunlap return (iscsit_idm_to_stmf(idm_rc)); 1563a6d42e7dSPeter Dunlap } 1564a6d42e7dSPeter Dunlap 1565a6d42e7dSPeter Dunlap /* What are we supposed to do if there is no direction? */ 1566a6d42e7dSPeter Dunlap return (STMF_INVALID_ARG); 1567a6d42e7dSPeter Dunlap } 1568a6d42e7dSPeter Dunlap 1569a6d42e7dSPeter Dunlap static void 1570a6d42e7dSPeter Dunlap iscsit_buf_xfer_cb(idm_buf_t *idb, idm_status_t status) 1571a6d42e7dSPeter Dunlap { 1572a6d42e7dSPeter Dunlap iscsit_task_t *itask = idb->idb_task_binding->idt_private; 1573a6d42e7dSPeter Dunlap stmf_data_buf_t *dbuf = idb->idb_cb_arg; 1574a6d42e7dSPeter Dunlap 1575a6d42e7dSPeter Dunlap dbuf->db_xfer_status = iscsit_idm_to_stmf(status); 1576a6d42e7dSPeter Dunlap 1577bf604c64SPeter Dunlap /* 1578bf604c64SPeter Dunlap * If the task has been aborted then we don't need to call STMF 1579bf604c64SPeter Dunlap */ 1580bf604c64SPeter Dunlap if (itask->it_stmf_abort) { 1581bf604c64SPeter Dunlap return; 1582bf604c64SPeter Dunlap } 1583bf604c64SPeter Dunlap 1584a6d42e7dSPeter Dunlap /* 158560220f10SPriya Krishnan * For ISCSI over TCP (not iSER), the last SCSI Data PDU passed 158660220f10SPriya Krishnan * for a successful command contains the status as requested by 158760220f10SPriya Krishnan * by COMSTAR (via the DB_SEND_STATUS_GOOD flag). But the iSER 158860220f10SPriya Krishnan * transport does not support phase-collapse. So pretend we are 158960220f10SPriya Krishnan * COMSTAR and send the status in a separate PDU now. 1590a6d42e7dSPeter Dunlap */ 159160220f10SPriya Krishnan if (idb->idb_task_binding->idt_flags & IDM_TASK_PHASECOLLAPSE_SUCCESS) { 159260220f10SPriya Krishnan /* 1593a2383ac5SPriya Krishnan * Mark task complete and notify COMSTAR 1594a2383ac5SPriya Krishnan * that the status has been sent. 159560220f10SPriya Krishnan */ 159660220f10SPriya Krishnan itask->it_idm_task->idt_state = TASK_COMPLETE; 159760220f10SPriya Krishnan stmf_send_status_done(itask->it_stmf_task, 159860220f10SPriya Krishnan iscsit_idm_to_stmf(status), STMF_IOF_LPORT_DONE); 159960220f10SPriya Krishnan } else if ((dbuf->db_flags & DB_SEND_STATUS_GOOD) && 1600a6d42e7dSPeter Dunlap status == IDM_STATUS_SUCCESS) { 160160220f10SPriya Krishnan 1602a6d42e7dSPeter Dunlap /* 160370a38f02SPriya Krishnan * The iscsi target port provider - for iSER, emulates the 160470a38f02SPriya Krishnan * DB_SEND_STATUS_GOOD optimization if requested by STMF; 160570a38f02SPriya Krishnan * it sends the status in a separate PDU after the data 160670a38f02SPriya Krishnan * transfer. In this case the port provider should first 160770a38f02SPriya Krishnan * call stmf_data_xfer_done() to mark the transfer complete 160870a38f02SPriya Krishnan * and then send the status. Although STMF will free the 160970a38f02SPriya Krishnan * buffer at the time the task is freed, even if the transfer 161070a38f02SPriya Krishnan * is not marked complete, this behavior makes statistics 161170a38f02SPriya Krishnan * gathering and task state tracking more difficult than it 161270a38f02SPriya Krishnan * needs to be. 1613a6d42e7dSPeter Dunlap */ 161470a38f02SPriya Krishnan stmf_data_xfer_done(itask->it_stmf_task, dbuf, 0); 1615a6d42e7dSPeter Dunlap if (iscsit_send_scsi_status(itask->it_stmf_task, 0) 161663528ae4SJames Moore != STMF_SUCCESS) { 161770a38f02SPriya Krishnan stmf_send_status_done(itask->it_stmf_task, 161870a38f02SPriya Krishnan STMF_FAILURE, STMF_IOF_LPORT_DONE); 1619a6d42e7dSPeter Dunlap } 1620a6d42e7dSPeter Dunlap } else { 1621a6d42e7dSPeter Dunlap stmf_data_xfer_done(itask->it_stmf_task, dbuf, 0); 162270a38f02SPriya Krishnan /* don't touch dbuf after stmf_data_xfer_done */ 1623a6d42e7dSPeter Dunlap } 1624a6d42e7dSPeter Dunlap } 1625a6d42e7dSPeter Dunlap 1626bf604c64SPeter Dunlap 1627a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1628a6d42e7dSPeter Dunlap stmf_status_t 1629a6d42e7dSPeter Dunlap iscsit_send_scsi_status(scsi_task_t *task, uint32_t ioflags) 1630a6d42e7dSPeter Dunlap { 1631a6d42e7dSPeter Dunlap iscsit_task_t *itask = task->task_port_private; 1632a6d42e7dSPeter Dunlap iscsi_scsi_rsp_hdr_t *rsp; 1633a6d42e7dSPeter Dunlap idm_pdu_t *pdu; 1634a6d42e7dSPeter Dunlap int resp_datalen; 1635a6d42e7dSPeter Dunlap 1636a6d42e7dSPeter Dunlap /* 1637a6d42e7dSPeter Dunlap * If this task is aborted then we don't need to respond. 1638a6d42e7dSPeter Dunlap */ 1639a6d42e7dSPeter Dunlap if (itask->it_stmf_abort) { 1640a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1641a6d42e7dSPeter Dunlap } 1642a6d42e7dSPeter Dunlap 1643a6d42e7dSPeter Dunlap /* 1644a6d42e7dSPeter Dunlap * If this is a task management status, handle it elsewhere. 1645a6d42e7dSPeter Dunlap */ 1646a6d42e7dSPeter Dunlap if (task->task_mgmt_function != TM_NONE) { 1647a6d42e7dSPeter Dunlap /* 1648a6d42e7dSPeter Dunlap * Don't wait for the PDU completion to tell STMF 1649a6d42e7dSPeter Dunlap * the task is done -- it doesn't really matter and 1650a6d42e7dSPeter Dunlap * it makes life complicated if STMF later asks us to 1651a6d42e7dSPeter Dunlap * abort the request and we don't know whether the 1652a6d42e7dSPeter Dunlap * status has been sent or not. 1653a6d42e7dSPeter Dunlap */ 1654a6d42e7dSPeter Dunlap itask->it_tm_responded = B_TRUE; 1655a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(itask->it_tm_pdu, 1656a6d42e7dSPeter Dunlap (task->task_completion_status == STMF_SUCCESS) ? 1657a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_COMPLETE : SCSI_TCP_TM_RESP_FUNC_NOT_SUPP); 1658a6d42e7dSPeter Dunlap stmf_send_status_done(task, STMF_SUCCESS, 1659a6d42e7dSPeter Dunlap STMF_IOF_LPORT_DONE); 1660a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1661a6d42e7dSPeter Dunlap } 1662a6d42e7dSPeter Dunlap 166372cf3143Speter dunlap /* 166472cf3143Speter dunlap * Remove the task from the session task list 166572cf3143Speter dunlap */ 166672cf3143Speter dunlap iscsit_task_done(itask); 166772cf3143Speter dunlap 166872cf3143Speter dunlap /* 166972cf3143Speter dunlap * Send status 167072cf3143Speter dunlap */ 1671a6d42e7dSPeter Dunlap mutex_enter(&itask->it_idm_task->idt_mutex); 1672a6d42e7dSPeter Dunlap if ((itask->it_idm_task->idt_state == TASK_ACTIVE) && 1673a6d42e7dSPeter Dunlap (task->task_completion_status == STMF_SUCCESS) && 1674a6d42e7dSPeter Dunlap (task->task_sense_length == 0) && 1675a6d42e7dSPeter Dunlap (task->task_resid == 0)) { 1676a6d42e7dSPeter Dunlap itask->it_idm_task->idt_state = TASK_COMPLETE; 1677a6d42e7dSPeter Dunlap /* PDU callback releases task hold */ 1678a6d42e7dSPeter Dunlap idm_task_hold(itask->it_idm_task); 1679a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 1680a6d42e7dSPeter Dunlap /* 1681a6d42e7dSPeter Dunlap * Fast path. Cached status PDU's are already 1682a6d42e7dSPeter Dunlap * initialized. We just need to fill in 168360220f10SPriya Krishnan * connection and task information. StatSN is 168460220f10SPriya Krishnan * incremented by 1 for every status sent a 168560220f10SPriya Krishnan * connection. 1686a6d42e7dSPeter Dunlap */ 1687a6d42e7dSPeter Dunlap pdu = kmem_cache_alloc(iscsit_status_pdu_cache, KM_SLEEP); 1688a6d42e7dSPeter Dunlap pdu->isp_ic = itask->it_ict->ict_ic; 1689a6d42e7dSPeter Dunlap pdu->isp_private = itask; 169060220f10SPriya Krishnan pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 1691a6d42e7dSPeter Dunlap 1692a6d42e7dSPeter Dunlap rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 1693a6d42e7dSPeter Dunlap rsp->itt = itask->it_itt; 16941d7b78a3SPriya Krishnan /* 16951d7b78a3SPriya Krishnan * ExpDataSN is the number of R2T and Data-In (read) 16961d7b78a3SPriya Krishnan * PDUs the target has sent for the SCSI command. 16971d7b78a3SPriya Krishnan * 16981d7b78a3SPriya Krishnan * Since there is no support for bidirectional transfer 16991d7b78a3SPriya Krishnan * yet, either idt_exp_datasn or idt_exp_rttsn, but not 17001d7b78a3SPriya Krishnan * both is valid at any time 17011d7b78a3SPriya Krishnan */ 17021d7b78a3SPriya Krishnan rsp->expdatasn = (itask->it_idm_task->idt_exp_datasn != 0) ? 17031d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_datasn): 17041d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_rttsn); 1705a6d42e7dSPeter Dunlap rsp->cmd_status = task->task_scsi_status; 1706a6d42e7dSPeter Dunlap iscsit_pdu_tx(pdu); 1707a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1708a6d42e7dSPeter Dunlap } else { 1709a6d42e7dSPeter Dunlap if (itask->it_idm_task->idt_state != TASK_ACTIVE) { 1710a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 171163528ae4SJames Moore return (STMF_FAILURE); 1712a6d42e7dSPeter Dunlap } 1713a6d42e7dSPeter Dunlap itask->it_idm_task->idt_state = TASK_COMPLETE; 1714a6d42e7dSPeter Dunlap /* PDU callback releases task hold */ 1715a6d42e7dSPeter Dunlap idm_task_hold(itask->it_idm_task); 1716a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 1717a6d42e7dSPeter Dunlap 1718a6d42e7dSPeter Dunlap resp_datalen = (task->task_sense_length == 0) ? 0 : 1719a6d42e7dSPeter Dunlap (task->task_sense_length + sizeof (uint16_t)); 1720a6d42e7dSPeter Dunlap 1721a6d42e7dSPeter Dunlap pdu = idm_pdu_alloc(sizeof (iscsi_hdr_t), resp_datalen); 1722a6d42e7dSPeter Dunlap idm_pdu_init(pdu, itask->it_ict->ict_ic, itask, 1723a6d42e7dSPeter Dunlap iscsit_send_status_done); 172460220f10SPriya Krishnan pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 1725a6d42e7dSPeter Dunlap 1726a6d42e7dSPeter Dunlap rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 1727a6d42e7dSPeter Dunlap bzero(rsp, sizeof (*rsp)); 1728a6d42e7dSPeter Dunlap rsp->opcode = ISCSI_OP_SCSI_RSP; 1729a6d42e7dSPeter Dunlap 1730a6d42e7dSPeter Dunlap rsp->flags = ISCSI_FLAG_FINAL; 1731a6d42e7dSPeter Dunlap if (task->task_status_ctrl & TASK_SCTRL_OVER) { 1732a6d42e7dSPeter Dunlap rsp->flags |= ISCSI_FLAG_CMD_OVERFLOW; 1733a6d42e7dSPeter Dunlap } else if (task->task_status_ctrl & TASK_SCTRL_UNDER) { 1734a6d42e7dSPeter Dunlap rsp->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 1735a6d42e7dSPeter Dunlap } 1736a6d42e7dSPeter Dunlap 1737a6d42e7dSPeter Dunlap rsp->bi_residual_count = 0; 1738a6d42e7dSPeter Dunlap rsp->residual_count = htonl(task->task_resid); 1739a6d42e7dSPeter Dunlap rsp->itt = itask->it_itt; 1740a6d42e7dSPeter Dunlap rsp->response = ISCSI_STATUS_CMD_COMPLETED; 17411d7b78a3SPriya Krishnan rsp->expdatasn = (itask->it_idm_task->idt_exp_datasn != 0) ? 17421d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_datasn): 17431d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_rttsn); 1744a6d42e7dSPeter Dunlap rsp->cmd_status = task->task_scsi_status; 1745a6d42e7dSPeter Dunlap if (task->task_sense_length != 0) { 1746a6d42e7dSPeter Dunlap /* 1747a6d42e7dSPeter Dunlap * Add a byte to provide the sense length in 1748a6d42e7dSPeter Dunlap * the response 1749a6d42e7dSPeter Dunlap */ 1750a6d42e7dSPeter Dunlap *(uint16_t *)((void *)pdu->isp_data) = 1751a6d42e7dSPeter Dunlap htons(task->task_sense_length); 1752a6d42e7dSPeter Dunlap bcopy(task->task_sense_data, 1753a6d42e7dSPeter Dunlap (uint8_t *)pdu->isp_data + 1754a6d42e7dSPeter Dunlap sizeof (uint16_t), 1755a6d42e7dSPeter Dunlap task->task_sense_length); 1756a6d42e7dSPeter Dunlap hton24(rsp->dlength, resp_datalen); 1757a6d42e7dSPeter Dunlap } 1758a6d42e7dSPeter Dunlap 175930e7468fSPeter Dunlap DTRACE_PROBE5(iscsi__scsi__response, 176030e7468fSPeter Dunlap iscsit_conn_t *, itask->it_ict, 176130e7468fSPeter Dunlap uint8_t, rsp->response, 176230e7468fSPeter Dunlap uint8_t, rsp->cmd_status, 176330e7468fSPeter Dunlap idm_pdu_t *, pdu, 176430e7468fSPeter Dunlap scsi_task_t *, task); 176530e7468fSPeter Dunlap 1766a6d42e7dSPeter Dunlap iscsit_pdu_tx(pdu); 1767a6d42e7dSPeter Dunlap 1768a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1769a6d42e7dSPeter Dunlap } 1770a6d42e7dSPeter Dunlap } 1771a6d42e7dSPeter Dunlap 1772a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1773a6d42e7dSPeter Dunlap static void 1774a6d42e7dSPeter Dunlap iscsit_send_good_status_done(idm_pdu_t *pdu, idm_status_t status) 1775a6d42e7dSPeter Dunlap { 1776bf604c64SPeter Dunlap iscsit_task_t *itask; 1777bf604c64SPeter Dunlap boolean_t aborted; 1778a6d42e7dSPeter Dunlap 1779a6d42e7dSPeter Dunlap itask = pdu->isp_private; 1780bf604c64SPeter Dunlap aborted = itask->it_stmf_abort; 1781bf604c64SPeter Dunlap 1782bf604c64SPeter Dunlap /* 1783bf604c64SPeter Dunlap * After releasing the hold the task may be freed at any time so 1784bf604c64SPeter Dunlap * don't touch it. 1785bf604c64SPeter Dunlap */ 1786a6d42e7dSPeter Dunlap idm_task_rele(itask->it_idm_task); 1787bf604c64SPeter Dunlap if (!aborted) { 1788bf604c64SPeter Dunlap stmf_send_status_done(itask->it_stmf_task, 1789bf604c64SPeter Dunlap iscsit_idm_to_stmf(pdu->isp_status), STMF_IOF_LPORT_DONE); 1790bf604c64SPeter Dunlap } 1791a6d42e7dSPeter Dunlap kmem_cache_free(iscsit_status_pdu_cache, pdu); 1792a6d42e7dSPeter Dunlap } 1793a6d42e7dSPeter Dunlap 1794a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1795a6d42e7dSPeter Dunlap static void 1796a6d42e7dSPeter Dunlap iscsit_send_status_done(idm_pdu_t *pdu, idm_status_t status) 1797a6d42e7dSPeter Dunlap { 1798a6d42e7dSPeter Dunlap iscsit_task_t *itask; 1799bf604c64SPeter Dunlap boolean_t aborted; 1800a6d42e7dSPeter Dunlap 1801a6d42e7dSPeter Dunlap itask = pdu->isp_private; 1802bf604c64SPeter Dunlap aborted = itask->it_stmf_abort; 1803bf604c64SPeter Dunlap 1804bf604c64SPeter Dunlap /* 1805bf604c64SPeter Dunlap * After releasing the hold the task may be freed at any time so 1806bf604c64SPeter Dunlap * don't touch it. 1807bf604c64SPeter Dunlap */ 1808a6d42e7dSPeter Dunlap idm_task_rele(itask->it_idm_task); 1809bf604c64SPeter Dunlap if (!aborted) { 1810bf604c64SPeter Dunlap stmf_send_status_done(itask->it_stmf_task, 1811bf604c64SPeter Dunlap iscsit_idm_to_stmf(pdu->isp_status), STMF_IOF_LPORT_DONE); 1812bf604c64SPeter Dunlap } 1813a6d42e7dSPeter Dunlap idm_pdu_free(pdu); 1814a6d42e7dSPeter Dunlap } 1815a6d42e7dSPeter Dunlap 1816a6d42e7dSPeter Dunlap 1817a6d42e7dSPeter Dunlap void 1818a6d42e7dSPeter Dunlap iscsit_lport_task_free(scsi_task_t *task) 1819a6d42e7dSPeter Dunlap { 1820a6d42e7dSPeter Dunlap iscsit_task_t *itask = task->task_port_private; 1821a6d42e7dSPeter Dunlap 1822a6d42e7dSPeter Dunlap /* We only call idm_task_start for regular tasks, not task management */ 1823a6d42e7dSPeter Dunlap if (task->task_mgmt_function == TM_NONE) { 1824a6d42e7dSPeter Dunlap idm_task_done(itask->it_idm_task); 1825a6d42e7dSPeter Dunlap iscsit_task_free(itask); 1826a6d42e7dSPeter Dunlap return; 1827a6d42e7dSPeter Dunlap } else { 1828a6d42e7dSPeter Dunlap iscsit_tm_task_free(itask); 1829a6d42e7dSPeter Dunlap } 1830a6d42e7dSPeter Dunlap } 1831a6d42e7dSPeter Dunlap 1832a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1833a6d42e7dSPeter Dunlap stmf_status_t 1834a6d42e7dSPeter Dunlap iscsit_abort(stmf_local_port_t *lport, int abort_cmd, void *arg, uint32_t flags) 1835a6d42e7dSPeter Dunlap { 1836a6d42e7dSPeter Dunlap scsi_task_t *st = (scsi_task_t *)arg; 1837a6d42e7dSPeter Dunlap iscsit_task_t *iscsit_task; 1838a6d42e7dSPeter Dunlap idm_task_t *idt; 1839a6d42e7dSPeter Dunlap 1840a6d42e7dSPeter Dunlap /* 1841a6d42e7dSPeter Dunlap * If this is a task management request then there's really not much to 1842a6d42e7dSPeter Dunlap * do. 1843a6d42e7dSPeter Dunlap */ 1844a6d42e7dSPeter Dunlap if (st->task_mgmt_function != TM_NONE) { 1845a6d42e7dSPeter Dunlap return (STMF_ABORT_SUCCESS); 1846a6d42e7dSPeter Dunlap } 1847a6d42e7dSPeter Dunlap 1848a6d42e7dSPeter Dunlap /* 1849a6d42e7dSPeter Dunlap * Regular task, start cleaning up 1850a6d42e7dSPeter Dunlap */ 1851a6d42e7dSPeter Dunlap iscsit_task = st->task_port_private; 1852a6d42e7dSPeter Dunlap idt = iscsit_task->it_idm_task; 1853a6d42e7dSPeter Dunlap mutex_enter(&iscsit_task->it_mutex); 1854a6d42e7dSPeter Dunlap iscsit_task->it_stmf_abort = B_TRUE; 1855a6d42e7dSPeter Dunlap if (iscsit_task->it_aborted) { 1856a6d42e7dSPeter Dunlap mutex_exit(&iscsit_task->it_mutex); 185772cf3143Speter dunlap /* 185872cf3143Speter dunlap * Task is no longer active 185972cf3143Speter dunlap */ 186072cf3143Speter dunlap iscsit_task_done(iscsit_task); 186172cf3143Speter dunlap 1862a6d42e7dSPeter Dunlap /* 1863a6d42e7dSPeter Dunlap * STMF specification is wrong... says to return 1864a6d42e7dSPeter Dunlap * STMF_ABORTED, the code actually looks for 1865a6d42e7dSPeter Dunlap * STMF_ABORT_SUCCESS. 1866a6d42e7dSPeter Dunlap */ 1867a6d42e7dSPeter Dunlap return (STMF_ABORT_SUCCESS); 1868a6d42e7dSPeter Dunlap } else { 1869a6d42e7dSPeter Dunlap mutex_exit(&iscsit_task->it_mutex); 1870a6d42e7dSPeter Dunlap /* 1871a6d42e7dSPeter Dunlap * Call IDM to abort the task. Due to a variety of 1872a6d42e7dSPeter Dunlap * circumstances the task may already be in the process of 1873a6d42e7dSPeter Dunlap * aborting. 1874a6d42e7dSPeter Dunlap * We'll let IDM worry about rationalizing all that except 1875a6d42e7dSPeter Dunlap * for one particular instance. If the state of the task 1876a6d42e7dSPeter Dunlap * is TASK_COMPLETE, we need to indicate to the framework 1877a6d42e7dSPeter Dunlap * that we are in fact done. This typically happens with 1878a6d42e7dSPeter Dunlap * framework-initiated task management type requests 1879a6d42e7dSPeter Dunlap * (e.g. abort task). 1880a6d42e7dSPeter Dunlap */ 1881a6d42e7dSPeter Dunlap if (idt->idt_state == TASK_COMPLETE) { 1882a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&idt->idt_refcnt); 1883a6d42e7dSPeter Dunlap return (STMF_ABORT_SUCCESS); 1884a6d42e7dSPeter Dunlap } else { 1885a6d42e7dSPeter Dunlap idm_task_abort(idt->idt_ic, idt, AT_TASK_MGMT_ABORT); 1886a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1887a6d42e7dSPeter Dunlap } 1888a6d42e7dSPeter Dunlap } 1889a6d42e7dSPeter Dunlap 1890a6d42e7dSPeter Dunlap /*NOTREACHED*/ 1891a6d42e7dSPeter Dunlap } 1892a6d42e7dSPeter Dunlap 1893a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1894a6d42e7dSPeter Dunlap void 1895a6d42e7dSPeter Dunlap iscsit_ctl(stmf_local_port_t *lport, int cmd, void *arg) 1896a6d42e7dSPeter Dunlap { 1897a6d42e7dSPeter Dunlap iscsit_tgt_t *iscsit_tgt; 1898a6d42e7dSPeter Dunlap 1899a6d42e7dSPeter Dunlap ASSERT((cmd == STMF_CMD_LPORT_ONLINE) || 1900a6d42e7dSPeter Dunlap (cmd == STMF_ACK_LPORT_ONLINE_COMPLETE) || 1901a6d42e7dSPeter Dunlap (cmd == STMF_CMD_LPORT_OFFLINE) || 1902a6d42e7dSPeter Dunlap (cmd == STMF_ACK_LPORT_OFFLINE_COMPLETE)); 1903a6d42e7dSPeter Dunlap 1904a6d42e7dSPeter Dunlap iscsit_tgt = (iscsit_tgt_t *)lport->lport_port_private; 1905a6d42e7dSPeter Dunlap 1906a6d42e7dSPeter Dunlap switch (cmd) { 1907a6d42e7dSPeter Dunlap case STMF_CMD_LPORT_ONLINE: 1908a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_ONLINE_REQ); 1909a6d42e7dSPeter Dunlap break; 1910a6d42e7dSPeter Dunlap case STMF_CMD_LPORT_OFFLINE: 1911a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_OFFLINE_REQ); 1912a6d42e7dSPeter Dunlap break; 1913a6d42e7dSPeter Dunlap case STMF_ACK_LPORT_ONLINE_COMPLETE: 1914a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_ONLINE_COMPLETE_ACK); 1915a6d42e7dSPeter Dunlap break; 1916a6d42e7dSPeter Dunlap case STMF_ACK_LPORT_OFFLINE_COMPLETE: 1917a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_OFFLINE_COMPLETE_ACK); 1918a6d42e7dSPeter Dunlap break; 1919a6d42e7dSPeter Dunlap 1920a6d42e7dSPeter Dunlap default: 1921a6d42e7dSPeter Dunlap break; 1922a6d42e7dSPeter Dunlap } 1923a6d42e7dSPeter Dunlap } 1924a6d42e7dSPeter Dunlap 1925a6d42e7dSPeter Dunlap static stmf_status_t 1926a6d42e7dSPeter Dunlap iscsit_idm_to_stmf(idm_status_t idmrc) 1927a6d42e7dSPeter Dunlap { 1928a6d42e7dSPeter Dunlap switch (idmrc) { 1929a6d42e7dSPeter Dunlap case IDM_STATUS_SUCCESS: 1930a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1931a6d42e7dSPeter Dunlap default: 1932a6d42e7dSPeter Dunlap return (STMF_FAILURE); 1933a6d42e7dSPeter Dunlap } 1934a6d42e7dSPeter Dunlap /*NOTREACHED*/ 1935a6d42e7dSPeter Dunlap } 1936a6d42e7dSPeter Dunlap 1937d618d68dSPriya Krishnan void 1938d618d68dSPriya Krishnan iscsit_op_scsi_cmd(idm_conn_t *ic, idm_pdu_t *rx_pdu) 1939d618d68dSPriya Krishnan { 1940d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 1941d618d68dSPriya Krishnan 1942d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 1943d618d68dSPriya Krishnan iscsit_post_scsi_cmd(ic, rx_pdu); 1944d618d68dSPriya Krishnan } 1945d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(ict->ict_sess); 1946d618d68dSPriya Krishnan } 1947a6d42e7dSPeter Dunlap 1948a6d42e7dSPeter Dunlap /* 1949a6d42e7dSPeter Dunlap * ISCSI protocol 1950a6d42e7dSPeter Dunlap */ 1951a6d42e7dSPeter Dunlap 1952a6d42e7dSPeter Dunlap void 1953d618d68dSPriya Krishnan iscsit_post_scsi_cmd(idm_conn_t *ic, idm_pdu_t *rx_pdu) 1954a6d42e7dSPeter Dunlap { 1955a6d42e7dSPeter Dunlap iscsit_conn_t *ict; 1956a6d42e7dSPeter Dunlap iscsit_task_t *itask; 1957a6d42e7dSPeter Dunlap scsi_task_t *task; 1958a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf; 1959a6d42e7dSPeter Dunlap iscsi_scsi_cmd_hdr_t *iscsi_scsi = 1960a6d42e7dSPeter Dunlap (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 1961a6d42e7dSPeter Dunlap iscsi_addl_hdr_t *ahs_hdr; 1962a6d42e7dSPeter Dunlap uint16_t addl_cdb_len = 0; 1963a6d42e7dSPeter Dunlap 1964a6d42e7dSPeter Dunlap ict = ic->ic_handle; 1965a6d42e7dSPeter Dunlap 1966a6d42e7dSPeter Dunlap itask = iscsit_task_alloc(ict); 1967a6d42e7dSPeter Dunlap if (itask == NULL) { 196872cf3143Speter dunlap /* Finish processing request */ 196972cf3143Speter dunlap iscsit_set_cmdsn(ict, rx_pdu); 197072cf3143Speter dunlap 1971a6d42e7dSPeter Dunlap iscsit_send_direct_scsi_resp(ict, rx_pdu, 1972a6d42e7dSPeter Dunlap ISCSI_STATUS_CMD_COMPLETED, STATUS_BUSY); 1973a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 1974a6d42e7dSPeter Dunlap return; 1975a6d42e7dSPeter Dunlap } 1976a6d42e7dSPeter Dunlap 1977a6d42e7dSPeter Dunlap /* 1978a6d42e7dSPeter Dunlap * Note CmdSN and ITT in task. IDM will have already validated this 1979a6d42e7dSPeter Dunlap * request against the connection state so we don't need to check 1980a6d42e7dSPeter Dunlap * that (the connection may have changed state in the meantime but 1981a6d42e7dSPeter Dunlap * we will catch that when we try to send a response) 1982a6d42e7dSPeter Dunlap */ 1983a6d42e7dSPeter Dunlap itask->it_cmdsn = ntohl(iscsi_scsi->cmdsn); 1984a6d42e7dSPeter Dunlap itask->it_itt = iscsi_scsi->itt; 1985a6d42e7dSPeter Dunlap 1986a6d42e7dSPeter Dunlap /* 1987a6d42e7dSPeter Dunlap * Check for extended CDB AHS 1988a6d42e7dSPeter Dunlap */ 1989a6d42e7dSPeter Dunlap if (iscsi_scsi->hlength > 0) { 1990a6d42e7dSPeter Dunlap ahs_hdr = (iscsi_addl_hdr_t *)iscsi_scsi; 1991a6d42e7dSPeter Dunlap addl_cdb_len = ((ahs_hdr->ahs_hlen_hi << 8) | 1992a6d42e7dSPeter Dunlap ahs_hdr->ahs_hlen_lo) - 1; /* Adjust for reserved byte */ 1993a6d42e7dSPeter Dunlap if (((addl_cdb_len + 4) / sizeof (uint32_t)) > 1994a6d42e7dSPeter Dunlap iscsi_scsi->hlength) { 1995a6d42e7dSPeter Dunlap /* Mangled header info, drop it */ 1996a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 1997a6d42e7dSPeter Dunlap return; 1998a6d42e7dSPeter Dunlap } 1999a6d42e7dSPeter Dunlap } 2000a6d42e7dSPeter Dunlap 2001a6d42e7dSPeter Dunlap ict = rx_pdu->isp_ic->ic_handle; /* IDM client private */ 2002a6d42e7dSPeter Dunlap 200372cf3143Speter dunlap /* 200472cf3143Speter dunlap * Add task to session list. This function will also check to 200572cf3143Speter dunlap * ensure that the task does not already exist. 200672cf3143Speter dunlap */ 200772cf3143Speter dunlap if (iscsit_task_start(itask) != IDM_STATUS_SUCCESS) { 200872cf3143Speter dunlap /* 200972cf3143Speter dunlap * Task exists, free all resources and reject. Don't 201072cf3143Speter dunlap * update expcmdsn in this case because RFC 3720 says 201172cf3143Speter dunlap * "The CmdSN of the rejected command PDU (if it is a 201272cf3143Speter dunlap * non-immediate command) MUST NOT be considered received 201372cf3143Speter dunlap * by the target (i.e., a command sequence gap must be 201472cf3143Speter dunlap * assumed for the CmdSN), even though the CmdSN of the 201572cf3143Speter dunlap * rejected command PDU may be reliably ascertained. Upon 201672cf3143Speter dunlap * receiving the Reject, the initiator MUST plug the CmdSN 201772cf3143Speter dunlap * gap in order to continue to use the session. The gap 201872cf3143Speter dunlap * may be plugged either by transmitting a command PDU 201972cf3143Speter dunlap * with the same CmdSN, or by aborting the task (see section 202072cf3143Speter dunlap * 6.9 on how an abort may plug a CmdSN gap)." (Section 6.3) 202172cf3143Speter dunlap */ 202272cf3143Speter dunlap iscsit_task_free(itask); 202372cf3143Speter dunlap iscsit_send_reject(ict, rx_pdu, ISCSI_REJECT_TASK_IN_PROGRESS); 202472cf3143Speter dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 202572cf3143Speter dunlap return; 202672cf3143Speter dunlap } 202772cf3143Speter dunlap 202872cf3143Speter dunlap /* Update sequence numbers */ 202972cf3143Speter dunlap iscsit_set_cmdsn(ict, rx_pdu); 203072cf3143Speter dunlap 203172cf3143Speter dunlap /* 203272cf3143Speter dunlap * Allocate STMF task 203372cf3143Speter dunlap */ 2034a6d42e7dSPeter Dunlap itask->it_stmf_task = stmf_task_alloc( 2035a6d42e7dSPeter Dunlap itask->it_ict->ict_sess->ist_lport, 2036a6d42e7dSPeter Dunlap itask->it_ict->ict_sess->ist_stmf_sess, iscsi_scsi->lun, 2037a6d42e7dSPeter Dunlap 16 + addl_cdb_len, 0); 2038a6d42e7dSPeter Dunlap if (itask->it_stmf_task == NULL) { 2039a6d42e7dSPeter Dunlap /* 2040a6d42e7dSPeter Dunlap * Either stmf really couldn't get memory for a task or, 2041a6d42e7dSPeter Dunlap * more likely, the LU is currently in reset. Either way 2042a6d42e7dSPeter Dunlap * we have no choice but to fail the request. 2043a6d42e7dSPeter Dunlap */ 204472cf3143Speter dunlap iscsit_task_done(itask); 2045a6d42e7dSPeter Dunlap iscsit_task_free(itask); 2046a6d42e7dSPeter Dunlap iscsit_send_direct_scsi_resp(ict, rx_pdu, 2047a6d42e7dSPeter Dunlap ISCSI_STATUS_CMD_COMPLETED, STATUS_BUSY); 204872cf3143Speter dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2049a6d42e7dSPeter Dunlap return; 2050a6d42e7dSPeter Dunlap } 2051a6d42e7dSPeter Dunlap 2052a6d42e7dSPeter Dunlap task = itask->it_stmf_task; 2053a6d42e7dSPeter Dunlap task->task_port_private = itask; 2054a6d42e7dSPeter Dunlap 2055a6d42e7dSPeter Dunlap bcopy(iscsi_scsi->lun, task->task_lun_no, sizeof (task->task_lun_no)); 2056a6d42e7dSPeter Dunlap 2057a6d42e7dSPeter Dunlap /* 2058a6d42e7dSPeter Dunlap * iSCSI and Comstar use the same values. Should we rely on this 2059a6d42e7dSPeter Dunlap * or translate them bit-wise? 2060a6d42e7dSPeter Dunlap */ 2061a6d42e7dSPeter Dunlap 2062a6d42e7dSPeter Dunlap task->task_flags = 2063a6d42e7dSPeter Dunlap (((iscsi_scsi->flags & ISCSI_FLAG_CMD_READ) ? TF_READ_DATA : 0) | 2064a6d42e7dSPeter Dunlap ((iscsi_scsi->flags & ISCSI_FLAG_CMD_WRITE) ? TF_WRITE_DATA : 0) | 2065a6d42e7dSPeter Dunlap ((rx_pdu->isp_datalen == 0) ? 0 : TF_INITIAL_BURST)); 2066a6d42e7dSPeter Dunlap 2067a6d42e7dSPeter Dunlap switch (iscsi_scsi->flags & ISCSI_FLAG_CMD_ATTR_MASK) { 2068a6d42e7dSPeter Dunlap case ISCSI_ATTR_UNTAGGED: 2069a6d42e7dSPeter Dunlap break; 2070a6d42e7dSPeter Dunlap case ISCSI_ATTR_SIMPLE: 2071a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_SIMPLE_QUEUE; 2072a6d42e7dSPeter Dunlap break; 2073a6d42e7dSPeter Dunlap case ISCSI_ATTR_ORDERED: 2074a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_ORDERED_QUEUE; 2075a6d42e7dSPeter Dunlap break; 2076a6d42e7dSPeter Dunlap case ISCSI_ATTR_HEAD_OF_QUEUE: 2077a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_HEAD_OF_QUEUE; 2078a6d42e7dSPeter Dunlap break; 2079a6d42e7dSPeter Dunlap case ISCSI_ATTR_ACA: 2080a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_ACA; 2081a6d42e7dSPeter Dunlap break; 2082a6d42e7dSPeter Dunlap default: 2083a6d42e7dSPeter Dunlap /* Protocol error but just take it, treat as untagged */ 2084a6d42e7dSPeter Dunlap break; 2085a6d42e7dSPeter Dunlap } 2086a6d42e7dSPeter Dunlap 2087a6d42e7dSPeter Dunlap 2088a6d42e7dSPeter Dunlap task->task_additional_flags = 0; 2089a6d42e7dSPeter Dunlap task->task_priority = 0; 2090a6d42e7dSPeter Dunlap task->task_mgmt_function = TM_NONE; 2091a6d42e7dSPeter Dunlap 2092a6d42e7dSPeter Dunlap /* 2093a6d42e7dSPeter Dunlap * This "task_max_nbufs" doesn't map well to BIDI. We probably need 2094a6d42e7dSPeter Dunlap * parameter for each direction. "MaxOutstandingR2T" may very well 2095a6d42e7dSPeter Dunlap * be set to one which could prevent us from doing simultaneous 2096a6d42e7dSPeter Dunlap * transfers in each direction. 2097a6d42e7dSPeter Dunlap */ 2098a6d42e7dSPeter Dunlap task->task_max_nbufs = (iscsi_scsi->flags & ISCSI_FLAG_CMD_WRITE) ? 2099a6d42e7dSPeter Dunlap ict->ict_op.op_max_outstanding_r2t : STMF_BUFS_MAX; 2100a6d42e7dSPeter Dunlap task->task_cmd_seq_no = ntohl(iscsi_scsi->itt); 2101a6d42e7dSPeter Dunlap task->task_expected_xfer_length = ntohl(iscsi_scsi->data_length); 2102a6d42e7dSPeter Dunlap 2103a6d42e7dSPeter Dunlap /* Copy CDB */ 2104a6d42e7dSPeter Dunlap bcopy(iscsi_scsi->scb, task->task_cdb, 16); 2105a6d42e7dSPeter Dunlap if (addl_cdb_len > 0) { 2106a6d42e7dSPeter Dunlap bcopy(ahs_hdr->ahs_extscb, task->task_cdb + 16, addl_cdb_len); 2107a6d42e7dSPeter Dunlap } 2108a6d42e7dSPeter Dunlap 2109a668b114SPriya Krishnan DTRACE_ISCSI_3(scsi__command, idm_conn_t *, ic, 2110a668b114SPriya Krishnan iscsi_scsi_cmd_hdr_t *, (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr, 2111a668b114SPriya Krishnan scsi_task_t *, task); 2112a668b114SPriya Krishnan 2113a6d42e7dSPeter Dunlap /* 2114a6d42e7dSPeter Dunlap * Copy the transport header into the task handle from the PDU 2115a6d42e7dSPeter Dunlap * handle. The transport header describes this task's remote tagged 2116a6d42e7dSPeter Dunlap * buffer. 2117a6d42e7dSPeter Dunlap */ 2118a6d42e7dSPeter Dunlap if (rx_pdu->isp_transport_hdrlen != 0) { 2119a6d42e7dSPeter Dunlap bcopy(rx_pdu->isp_transport_hdr, 2120a6d42e7dSPeter Dunlap itask->it_idm_task->idt_transport_hdr, 2121a6d42e7dSPeter Dunlap rx_pdu->isp_transport_hdrlen); 2122a6d42e7dSPeter Dunlap } 2123a6d42e7dSPeter Dunlap 2124a6d42e7dSPeter Dunlap /* 2125a6d42e7dSPeter Dunlap * Tell IDM about our new active task 2126a6d42e7dSPeter Dunlap */ 2127a6d42e7dSPeter Dunlap idm_task_start(itask->it_idm_task, (uintptr_t)itask->it_itt); 2128a6d42e7dSPeter Dunlap 2129a6d42e7dSPeter Dunlap /* 2130a6d42e7dSPeter Dunlap * If we have any immediate data then setup the immediate buffer 2131a6d42e7dSPeter Dunlap * context that comes with the task 2132a6d42e7dSPeter Dunlap */ 2133a6d42e7dSPeter Dunlap if (rx_pdu->isp_datalen) { 2134a6d42e7dSPeter Dunlap ibuf = itask->it_immed_data; 2135a6d42e7dSPeter Dunlap ibuf->ibuf_immed_data_pdu = rx_pdu; 2136a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_data_size = rx_pdu->isp_datalen; 2137a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_buf_size = rx_pdu->isp_datalen; 2138a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_relative_offset = 0; 2139a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_sglist[0].seg_length = 2140a6d42e7dSPeter Dunlap rx_pdu->isp_datalen; 2141a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_sglist[0].seg_addr = rx_pdu->isp_data; 2142a6d42e7dSPeter Dunlap 2143a668b114SPriya Krishnan DTRACE_ISCSI_8(xfer__start, idm_conn_t *, ic, 2144a668b114SPriya Krishnan uintptr_t, ibuf->ibuf_stmf_buf->db_sglist[0].seg_addr, 2145a668b114SPriya Krishnan uint32_t, ibuf->ibuf_stmf_buf->db_relative_offset, 2146a668b114SPriya Krishnan uint64_t, 0, uint32_t, 0, uint32_t, 0, /* no raddr */ 2147a668b114SPriya Krishnan uint32_t, rx_pdu->isp_datalen, int, XFER_BUF_TX_TO_INI); 2148a668b114SPriya Krishnan 21493badd853SPriya Krishnan /* 21503badd853SPriya Krishnan * For immediate data transfer, there is no callback from 21513badd853SPriya Krishnan * stmf to indicate that the initial burst of data is 21523badd853SPriya Krishnan * transferred successfully. In some cases, the task can 21533badd853SPriya Krishnan * get freed before execution returns from stmf_post_task. 21543badd853SPriya Krishnan * Although this xfer-start/done probe accurately tracks 21553badd853SPriya Krishnan * the size of the transfer, it does only provide a best 21563badd853SPriya Krishnan * effort on the timing of the transfer. 21573badd853SPriya Krishnan */ 2158a668b114SPriya Krishnan DTRACE_ISCSI_8(xfer__done, idm_conn_t *, ic, 2159a668b114SPriya Krishnan uintptr_t, ibuf->ibuf_stmf_buf->db_sglist[0].seg_addr, 2160a668b114SPriya Krishnan uint32_t, ibuf->ibuf_stmf_buf->db_relative_offset, 2161a668b114SPriya Krishnan uint64_t, 0, uint32_t, 0, uint32_t, 0, /* no raddr */ 2162a668b114SPriya Krishnan uint32_t, rx_pdu->isp_datalen, int, XFER_BUF_TX_TO_INI); 21633badd853SPriya Krishnan stmf_post_task(task, ibuf->ibuf_stmf_buf); 2164a6d42e7dSPeter Dunlap } else { 21653badd853SPriya Krishnan 2166a6d42e7dSPeter Dunlap stmf_post_task(task, NULL); 2167a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2168a6d42e7dSPeter Dunlap } 2169a6d42e7dSPeter Dunlap } 2170a6d42e7dSPeter Dunlap 2171a6d42e7dSPeter Dunlap void 2172a6d42e7dSPeter Dunlap iscsit_deferred_dispatch(idm_pdu_t *rx_pdu) 2173a6d42e7dSPeter Dunlap { 2174a6d42e7dSPeter Dunlap iscsit_conn_t *ict = rx_pdu->isp_ic->ic_handle; 2175a6d42e7dSPeter Dunlap 2176a6d42e7dSPeter Dunlap /* 2177a6d42e7dSPeter Dunlap * If the connection has been lost then ignore new PDU's 2178a6d42e7dSPeter Dunlap */ 2179a6d42e7dSPeter Dunlap mutex_enter(&ict->ict_mutex); 2180a6d42e7dSPeter Dunlap if (ict->ict_lost) { 2181a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 2182a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 2183a6d42e7dSPeter Dunlap return; 2184a6d42e7dSPeter Dunlap } 2185a6d42e7dSPeter Dunlap 2186a6d42e7dSPeter Dunlap /* 2187a6d42e7dSPeter Dunlap * Grab a hold on the connection to prevent it from going away 2188a6d42e7dSPeter Dunlap * between now and when the taskq function is called. 2189a6d42e7dSPeter Dunlap */ 2190a6d42e7dSPeter Dunlap iscsit_conn_dispatch_hold(ict); 2191a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 2192a6d42e7dSPeter Dunlap 2193*6319b0c7SGarrett D'Amore taskq_dispatch_ent(iscsit_global.global_dispatch_taskq, 2194*6319b0c7SGarrett D'Amore iscsit_deferred, rx_pdu, 0, &rx_pdu->isp_tqent); 2195a6d42e7dSPeter Dunlap } 2196a6d42e7dSPeter Dunlap 2197a6d42e7dSPeter Dunlap static void 2198a6d42e7dSPeter Dunlap iscsit_deferred(void *rx_pdu_void) 2199a6d42e7dSPeter Dunlap { 2200d618d68dSPriya Krishnan idm_pdu_t *rx_pdu = rx_pdu_void; 2201d618d68dSPriya Krishnan idm_conn_t *ic = rx_pdu->isp_ic; 2202d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 2203a6d42e7dSPeter Dunlap 2204d618d68dSPriya Krishnan /* 2205d618d68dSPriya Krishnan * NOP and Task Management Commands can be marked for immediate 2206d618d68dSPriya Krishnan * delivery. Commands marked as 'Immediate' are to be considered 2207d618d68dSPriya Krishnan * for execution as soon as they arrive on the target. So these 2208d618d68dSPriya Krishnan * should not be checked for sequence order and put in a queue. 2209d618d68dSPriya Krishnan * The CmdSN is not advanced for Immediate Commands. 2210d618d68dSPriya Krishnan */ 2211a6d42e7dSPeter Dunlap switch (IDM_PDU_OPCODE(rx_pdu)) { 2212a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_OUT: 2213d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 2214d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 2215d618d68dSPriya Krishnan iscsit_pdu_op_noop(ict, rx_pdu); 2216d618d68dSPriya Krishnan } 2217a6d42e7dSPeter Dunlap break; 2218a6d42e7dSPeter Dunlap case ISCSI_OP_LOGIN_CMD: 2219a6d42e7dSPeter Dunlap iscsit_pdu_op_login_cmd(ict, rx_pdu); 2220d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); 2221d618d68dSPriya Krishnan return; 2222a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_CMD: 2223d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 2224d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 2225d618d68dSPriya Krishnan iscsit_pdu_op_text_cmd(ict, rx_pdu); 2226d618d68dSPriya Krishnan } 2227a6d42e7dSPeter Dunlap break; 2228a6d42e7dSPeter Dunlap case ISCSI_OP_LOGOUT_CMD: 2229d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 2230d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 2231d618d68dSPriya Krishnan iscsit_pdu_op_logout_cmd(ict, rx_pdu); 2232d618d68dSPriya Krishnan } 2233a6d42e7dSPeter Dunlap break; 2234a6d42e7dSPeter Dunlap default: 2235a6d42e7dSPeter Dunlap /* Protocol error. IDM should have caught this */ 2236a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 2237a6d42e7dSPeter Dunlap ASSERT(0); 2238a6d42e7dSPeter Dunlap break; 2239a6d42e7dSPeter Dunlap } 2240d618d68dSPriya Krishnan /* 2241d618d68dSPriya Krishnan * Check if there are other PDUs in the session staging queue 2242d618d68dSPriya Krishnan * waiting to be posted to SCSI layer. 2243d618d68dSPriya Krishnan */ 2244d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(ict->ict_sess); 2245a6d42e7dSPeter Dunlap 2246a6d42e7dSPeter Dunlap iscsit_conn_dispatch_rele(ict); 2247a6d42e7dSPeter Dunlap } 2248a6d42e7dSPeter Dunlap 2249a6d42e7dSPeter Dunlap static void 2250a6d42e7dSPeter Dunlap iscsit_send_direct_scsi_resp(iscsit_conn_t *ict, idm_pdu_t *rx_pdu, 2251a6d42e7dSPeter Dunlap uint8_t response, uint8_t cmd_status) 2252a6d42e7dSPeter Dunlap { 2253a6d42e7dSPeter Dunlap idm_pdu_t *rsp_pdu; 2254a6d42e7dSPeter Dunlap idm_conn_t *ic; 2255a6d42e7dSPeter Dunlap iscsi_scsi_rsp_hdr_t *resp; 225630e7468fSPeter Dunlap iscsi_scsi_cmd_hdr_t *req = 225730e7468fSPeter Dunlap (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 2258a6d42e7dSPeter Dunlap 2259a6d42e7dSPeter Dunlap ic = ict->ict_ic; 2260a6d42e7dSPeter Dunlap 2261a6d42e7dSPeter Dunlap rsp_pdu = idm_pdu_alloc(sizeof (iscsi_scsi_rsp_hdr_t), 0); 2262a6d42e7dSPeter Dunlap idm_pdu_init(rsp_pdu, ic, NULL, NULL); 226360220f10SPriya Krishnan /* 226460220f10SPriya Krishnan * StatSN is incremented by 1 for every response sent on 226560220f10SPriya Krishnan * a connection except for responses sent as a result of 226660220f10SPriya Krishnan * a retry or SNACK 226760220f10SPriya Krishnan */ 226860220f10SPriya Krishnan rsp_pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 226960220f10SPriya Krishnan 2270a6d42e7dSPeter Dunlap resp = (iscsi_scsi_rsp_hdr_t *)rsp_pdu->isp_hdr; 2271a6d42e7dSPeter Dunlap 2272a6d42e7dSPeter Dunlap resp->opcode = ISCSI_OP_SCSI_RSP; 2273a6d42e7dSPeter Dunlap resp->flags = ISCSI_FLAG_FINAL; 2274a6d42e7dSPeter Dunlap resp->response = response; 2275a6d42e7dSPeter Dunlap resp->cmd_status = cmd_status; 227630e7468fSPeter Dunlap resp->itt = req->itt; 227730e7468fSPeter Dunlap if ((response == ISCSI_STATUS_CMD_COMPLETED) && 227830e7468fSPeter Dunlap (req->data_length != 0) && 227930e7468fSPeter Dunlap ((req->flags & ISCSI_FLAG_CMD_READ) || 228030e7468fSPeter Dunlap (req->flags & ISCSI_FLAG_CMD_WRITE))) { 228130e7468fSPeter Dunlap resp->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 228230e7468fSPeter Dunlap resp->residual_count = req->data_length; 228330e7468fSPeter Dunlap } 228430e7468fSPeter Dunlap 228530e7468fSPeter Dunlap DTRACE_PROBE4(iscsi__scsi__direct__response, 228630e7468fSPeter Dunlap iscsit_conn_t *, ict, 228730e7468fSPeter Dunlap uint8_t, resp->response, 228830e7468fSPeter Dunlap uint8_t, resp->cmd_status, 228930e7468fSPeter Dunlap idm_pdu_t *, rsp_pdu); 2290a6d42e7dSPeter Dunlap 2291a6d42e7dSPeter Dunlap iscsit_pdu_tx(rsp_pdu); 2292a6d42e7dSPeter Dunlap } 2293a6d42e7dSPeter Dunlap 2294a6d42e7dSPeter Dunlap void 2295a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(idm_pdu_t *tm_resp_pdu, uint8_t tm_status) 2296a6d42e7dSPeter Dunlap { 2297a6d42e7dSPeter Dunlap iscsi_scsi_task_mgt_rsp_hdr_t *tm_resp; 2298a6d42e7dSPeter Dunlap 229960220f10SPriya Krishnan /* 230060220f10SPriya Krishnan * The target must take note of the last-sent StatSN. 230160220f10SPriya Krishnan * The StatSN is to be incremented after sending a 230260220f10SPriya Krishnan * task management response. Digest recovery can only 230360220f10SPriya Krishnan * work if StatSN is incremented. 230460220f10SPriya Krishnan */ 230560220f10SPriya Krishnan tm_resp_pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 2306a6d42e7dSPeter Dunlap tm_resp = (iscsi_scsi_task_mgt_rsp_hdr_t *)tm_resp_pdu->isp_hdr; 2307a6d42e7dSPeter Dunlap tm_resp->response = tm_status; 230830e7468fSPeter Dunlap 230930e7468fSPeter Dunlap DTRACE_PROBE3(iscsi__scsi__tm__response, 231030e7468fSPeter Dunlap iscsit_conn_t *, tm_resp_pdu->isp_ic->ic_handle, 231130e7468fSPeter Dunlap uint8_t, tm_resp->response, 231230e7468fSPeter Dunlap idm_pdu_t *, tm_resp_pdu); 2313a6d42e7dSPeter Dunlap iscsit_pdu_tx(tm_resp_pdu); 2314a6d42e7dSPeter Dunlap } 2315a6d42e7dSPeter Dunlap 2316a6d42e7dSPeter Dunlap void 2317a6d42e7dSPeter Dunlap iscsit_op_scsi_task_mgmt(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2318a6d42e7dSPeter Dunlap { 2319a6d42e7dSPeter Dunlap idm_pdu_t *tm_resp_pdu; 2320a6d42e7dSPeter Dunlap iscsit_task_t *itask; 2321a6d42e7dSPeter Dunlap iscsit_task_t *tm_itask; 2322a6d42e7dSPeter Dunlap scsi_task_t *task; 2323a6d42e7dSPeter Dunlap iscsi_scsi_task_mgt_hdr_t *iscsi_tm = 2324a6d42e7dSPeter Dunlap (iscsi_scsi_task_mgt_hdr_t *)rx_pdu->isp_hdr; 2325a6d42e7dSPeter Dunlap iscsi_scsi_task_mgt_rsp_hdr_t *iscsi_tm_rsp = 2326a6d42e7dSPeter Dunlap (iscsi_scsi_task_mgt_rsp_hdr_t *)rx_pdu->isp_hdr; 2327a6d42e7dSPeter Dunlap uint32_t rtt, cmdsn, refcmdsn; 2328a6d42e7dSPeter Dunlap uint8_t tm_func; 2329a6d42e7dSPeter Dunlap 2330a6d42e7dSPeter Dunlap /* 2331a6d42e7dSPeter Dunlap * Setup response PDU (response field will get filled in later) 2332a6d42e7dSPeter Dunlap */ 2333a6d42e7dSPeter Dunlap tm_resp_pdu = idm_pdu_alloc(sizeof (iscsi_scsi_task_mgt_rsp_hdr_t), 0); 2334a6d42e7dSPeter Dunlap if (tm_resp_pdu == NULL) { 2335a6d42e7dSPeter Dunlap /* Can't respond, just drop it */ 2336a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2337a6d42e7dSPeter Dunlap return; 2338a6d42e7dSPeter Dunlap } 2339a6d42e7dSPeter Dunlap idm_pdu_init(tm_resp_pdu, ict->ict_ic, NULL, NULL); 2340a6d42e7dSPeter Dunlap iscsi_tm_rsp = (iscsi_scsi_task_mgt_rsp_hdr_t *)tm_resp_pdu->isp_hdr; 2341a6d42e7dSPeter Dunlap bzero(iscsi_tm_rsp, sizeof (iscsi_scsi_task_mgt_rsp_hdr_t)); 2342a6d42e7dSPeter Dunlap iscsi_tm_rsp->opcode = ISCSI_OP_SCSI_TASK_MGT_RSP; 2343a6d42e7dSPeter Dunlap iscsi_tm_rsp->flags = ISCSI_FLAG_FINAL; 2344a6d42e7dSPeter Dunlap iscsi_tm_rsp->itt = rx_pdu->isp_hdr->itt; 2345a6d42e7dSPeter Dunlap 2346a6d42e7dSPeter Dunlap /* 2347a6d42e7dSPeter Dunlap * Figure out what we're being asked to do. 2348a6d42e7dSPeter Dunlap */ 234930e7468fSPeter Dunlap DTRACE_PROBE4(iscsi__scsi__tm__request, 235030e7468fSPeter Dunlap iscsit_conn_t *, ict, 235130e7468fSPeter Dunlap uint8_t, (iscsi_tm->function & ISCSI_FLAG_TASK_MGMT_FUNCTION_MASK), 235230e7468fSPeter Dunlap uint32_t, iscsi_tm->rtt, 235330e7468fSPeter Dunlap idm_pdu_t *, rx_pdu); 2354a6d42e7dSPeter Dunlap switch (iscsi_tm->function & ISCSI_FLAG_TASK_MGMT_FUNCTION_MASK) { 2355a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_ABORT_TASK: 2356a6d42e7dSPeter Dunlap /* 2357a6d42e7dSPeter Dunlap * STMF doesn't currently support the "abort task" task 2358a6d42e7dSPeter Dunlap * management command although it does support aborting 2359a6d42e7dSPeter Dunlap * an individual task. We'll get STMF to abort the task 2360a6d42e7dSPeter Dunlap * for us but handle the details of the task management 2361a6d42e7dSPeter Dunlap * command ourselves. 2362a6d42e7dSPeter Dunlap * 2363a6d42e7dSPeter Dunlap * Find the task associated with the referenced task tag. 2364a6d42e7dSPeter Dunlap */ 2365a6d42e7dSPeter Dunlap rtt = iscsi_tm->rtt; 2366a6d42e7dSPeter Dunlap itask = (iscsit_task_t *)idm_task_find_by_handle(ict->ict_ic, 2367a6d42e7dSPeter Dunlap (uintptr_t)rtt); 2368a6d42e7dSPeter Dunlap 2369a6d42e7dSPeter Dunlap if (itask == NULL) { 2370a6d42e7dSPeter Dunlap cmdsn = ntohl(iscsi_tm->cmdsn); 2371a6d42e7dSPeter Dunlap refcmdsn = ntohl(iscsi_tm->refcmdsn); 2372a6d42e7dSPeter Dunlap 2373a6d42e7dSPeter Dunlap /* 2374d618d68dSPriya Krishnan * Task was not found. But the SCSI command could be 2375d618d68dSPriya Krishnan * on the rxpdu wait queue. If RefCmdSN is within 2376d618d68dSPriya Krishnan * the CmdSN window and less than CmdSN of the TM 2377d618d68dSPriya Krishnan * function, return "Function Complete". Otherwise, 2378d618d68dSPriya Krishnan * return "Task Does Not Exist". 2379a6d42e7dSPeter Dunlap */ 2380a6d42e7dSPeter Dunlap 2381a6d42e7dSPeter Dunlap if (iscsit_cmdsn_in_window(ict, refcmdsn) && 2382d618d68dSPriya Krishnan iscsit_sna_lt(refcmdsn, cmdsn)) { 2383d618d68dSPriya Krishnan mutex_enter(&ict->ict_sess->ist_sn_mutex); 2384d618d68dSPriya Krishnan (void) iscsit_remove_pdu_from_queue( 2385d618d68dSPriya Krishnan ict->ict_sess, refcmdsn); 2386d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); 2387d618d68dSPriya Krishnan mutex_exit(&ict->ict_sess->ist_sn_mutex); 2388a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2389a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_COMPLETE); 2390a6d42e7dSPeter Dunlap } else { 2391a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2392a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_NO_TASK); 2393a6d42e7dSPeter Dunlap } 2394a6d42e7dSPeter Dunlap } else { 2395a6d42e7dSPeter Dunlap 2396a6d42e7dSPeter Dunlap /* 2397a6d42e7dSPeter Dunlap * Tell STMF to abort the task. This will do no harm 2398a6d42e7dSPeter Dunlap * if the task is already complete. 2399a6d42e7dSPeter Dunlap */ 2400a6d42e7dSPeter Dunlap stmf_abort(STMF_QUEUE_TASK_ABORT, itask->it_stmf_task, 2401a6d42e7dSPeter Dunlap STMF_ABORTED, NULL); 2402a6d42e7dSPeter Dunlap 2403a6d42e7dSPeter Dunlap /* 2404a6d42e7dSPeter Dunlap * Make sure the task hasn't already completed 2405a6d42e7dSPeter Dunlap */ 2406a6d42e7dSPeter Dunlap mutex_enter(&itask->it_idm_task->idt_mutex); 2407a6d42e7dSPeter Dunlap if ((itask->it_idm_task->idt_state == TASK_COMPLETE) || 2408a6d42e7dSPeter Dunlap (itask->it_idm_task->idt_state == TASK_IDLE)) { 2409a6d42e7dSPeter Dunlap /* 2410a6d42e7dSPeter Dunlap * Task is complete, return "Task Does Not 2411a6d42e7dSPeter Dunlap * Exist" 2412a6d42e7dSPeter Dunlap */ 2413a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 2414a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2415a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_NO_TASK); 2416a6d42e7dSPeter Dunlap } else { 2417a6d42e7dSPeter Dunlap /* 2418a6d42e7dSPeter Dunlap * STMF is now aborting the task, return 2419a6d42e7dSPeter Dunlap * "Function Complete" 2420a6d42e7dSPeter Dunlap */ 2421a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 2422a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2423a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_COMPLETE); 2424a6d42e7dSPeter Dunlap } 2425a6d42e7dSPeter Dunlap idm_task_rele(itask->it_idm_task); 2426a6d42e7dSPeter Dunlap } 2427a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2428a6d42e7dSPeter Dunlap return; 2429a6d42e7dSPeter Dunlap 2430a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_ABORT_TASK_SET: 2431a6d42e7dSPeter Dunlap tm_func = TM_ABORT_TASK_SET; 2432a6d42e7dSPeter Dunlap break; 2433a6d42e7dSPeter Dunlap 2434a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_CLEAR_ACA: 2435a6d42e7dSPeter Dunlap tm_func = TM_CLEAR_ACA; 2436a6d42e7dSPeter Dunlap break; 2437a6d42e7dSPeter Dunlap 2438a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_CLEAR_TASK_SET: 2439a6d42e7dSPeter Dunlap tm_func = TM_CLEAR_TASK_SET; 2440a6d42e7dSPeter Dunlap break; 2441a6d42e7dSPeter Dunlap 2442a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: 2443a6d42e7dSPeter Dunlap tm_func = TM_LUN_RESET; 2444a6d42e7dSPeter Dunlap break; 2445a6d42e7dSPeter Dunlap 2446a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_TARGET_WARM_RESET: 2447a6d42e7dSPeter Dunlap tm_func = TM_TARGET_WARM_RESET; 2448a6d42e7dSPeter Dunlap break; 2449a6d42e7dSPeter Dunlap 2450a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_TARGET_COLD_RESET: 2451a6d42e7dSPeter Dunlap tm_func = TM_TARGET_COLD_RESET; 2452a6d42e7dSPeter Dunlap break; 2453a6d42e7dSPeter Dunlap 2454a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_TASK_REASSIGN: 2455a6d42e7dSPeter Dunlap /* 2456a6d42e7dSPeter Dunlap * We do not currently support allegiance reassignment. When 2457a6d42e7dSPeter Dunlap * we start supporting ERL1+, we will need to. 2458a6d42e7dSPeter Dunlap */ 2459a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2460a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_NO_ALLG_REASSN); 2461a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2462a6d42e7dSPeter Dunlap return; 2463a6d42e7dSPeter Dunlap 2464a6d42e7dSPeter Dunlap default: 2465a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2466a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_REJECTED); 2467a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2468a6d42e7dSPeter Dunlap return; 2469a6d42e7dSPeter Dunlap } 2470a6d42e7dSPeter Dunlap 2471a6d42e7dSPeter Dunlap tm_itask = iscsit_tm_task_alloc(ict); 2472a6d42e7dSPeter Dunlap if (tm_itask == NULL) { 2473a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2474a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_REJECTED); 2475a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2476a6d42e7dSPeter Dunlap return; 2477a6d42e7dSPeter Dunlap } 2478a6d42e7dSPeter Dunlap 2479a6d42e7dSPeter Dunlap 2480a6d42e7dSPeter Dunlap task = stmf_task_alloc(ict->ict_sess->ist_lport, 2481a6d42e7dSPeter Dunlap ict->ict_sess->ist_stmf_sess, iscsi_tm->lun, 2482a6d42e7dSPeter Dunlap 0, STMF_TASK_EXT_NONE); 2483a6d42e7dSPeter Dunlap if (task == NULL) { 2484a6d42e7dSPeter Dunlap /* 2485a6d42e7dSPeter Dunlap * If this happens, either the LU is in reset, couldn't 2486a6d42e7dSPeter Dunlap * get memory, or some other condition in which we simply 2487a6d42e7dSPeter Dunlap * can't complete this request. It would be nice to return 2488a6d42e7dSPeter Dunlap * an error code like "busy" but the closest we have is 2489a6d42e7dSPeter Dunlap * "rejected". 2490a6d42e7dSPeter Dunlap */ 2491a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2492a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_REJECTED); 2493a6d42e7dSPeter Dunlap iscsit_tm_task_free(tm_itask); 2494a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2495a6d42e7dSPeter Dunlap return; 2496a6d42e7dSPeter Dunlap } 2497a6d42e7dSPeter Dunlap 2498a6d42e7dSPeter Dunlap tm_itask->it_tm_pdu = tm_resp_pdu; 2499a6d42e7dSPeter Dunlap tm_itask->it_stmf_task = task; 2500a6d42e7dSPeter Dunlap task->task_port_private = tm_itask; 2501a6d42e7dSPeter Dunlap task->task_mgmt_function = tm_func; 2502a6d42e7dSPeter Dunlap task->task_additional_flags = TASK_AF_NO_EXPECTED_XFER_LENGTH; 2503a6d42e7dSPeter Dunlap task->task_priority = 0; 2504a6d42e7dSPeter Dunlap task->task_max_nbufs = STMF_BUFS_MAX; 2505a6d42e7dSPeter Dunlap task->task_cmd_seq_no = iscsi_tm->itt; 2506a6d42e7dSPeter Dunlap task->task_expected_xfer_length = 0; 2507a6d42e7dSPeter Dunlap 2508a6d42e7dSPeter Dunlap stmf_post_task(task, NULL); 2509a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2510a6d42e7dSPeter Dunlap } 2511a6d42e7dSPeter Dunlap 2512a6d42e7dSPeter Dunlap static void 2513a6d42e7dSPeter Dunlap iscsit_pdu_op_noop(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2514a6d42e7dSPeter Dunlap { 2515a6d42e7dSPeter Dunlap iscsi_nop_out_hdr_t *out = (iscsi_nop_out_hdr_t *)rx_pdu->isp_hdr; 2516a6d42e7dSPeter Dunlap iscsi_nop_in_hdr_t *in; 2517a6d42e7dSPeter Dunlap int resp_datalen; 2518a6d42e7dSPeter Dunlap idm_pdu_t *resp; 2519a6d42e7dSPeter Dunlap 2520a6d42e7dSPeter Dunlap /* Ignore the response from initiator */ 252172cf3143Speter dunlap if ((out->itt == ISCSI_RSVD_TASK_TAG) || 252272cf3143Speter dunlap (out->ttt != ISCSI_RSVD_TASK_TAG)) { 252372cf3143Speter dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2524a6d42e7dSPeter Dunlap return; 252572cf3143Speter dunlap } 2526a6d42e7dSPeter Dunlap 2527a6d42e7dSPeter Dunlap /* Allocate a PDU to respond */ 2528a6d42e7dSPeter Dunlap resp_datalen = ntoh24(out->dlength); 2529a6d42e7dSPeter Dunlap resp = idm_pdu_alloc(sizeof (iscsi_hdr_t), resp_datalen); 2530a6d42e7dSPeter Dunlap idm_pdu_init(resp, ict->ict_ic, NULL, NULL); 2531a6d42e7dSPeter Dunlap if (resp_datalen > 0) { 2532a6d42e7dSPeter Dunlap bcopy(rx_pdu->isp_data, resp->isp_data, resp_datalen); 2533a6d42e7dSPeter Dunlap } 2534a6d42e7dSPeter Dunlap 253560220f10SPriya Krishnan /* 253660220f10SPriya Krishnan * When sending a NOP-In as a response to a NOP-Out from the initiator, 253760220f10SPriya Krishnan * the target must respond with the same initiator task tag that was 253860220f10SPriya Krishnan * provided in the NOP-Out request, the target transfer tag must be 253960220f10SPriya Krishnan * ISCSI_RSVD_TASK_TAG (0xffffffff) and StatSN will contain the next 254060220f10SPriya Krishnan * status sequence number. The StatSN for the connection is advanced 254160220f10SPriya Krishnan * after this PDU is sent. 254260220f10SPriya Krishnan */ 2543a6d42e7dSPeter Dunlap in = (iscsi_nop_in_hdr_t *)resp->isp_hdr; 2544a6d42e7dSPeter Dunlap bzero(in, sizeof (*in)); 2545a6d42e7dSPeter Dunlap in->opcode = ISCSI_OP_NOOP_IN; 2546a6d42e7dSPeter Dunlap in->flags = ISCSI_FLAG_FINAL; 2547a6d42e7dSPeter Dunlap bcopy(out->lun, in->lun, 8); 2548a6d42e7dSPeter Dunlap in->itt = out->itt; 2549a6d42e7dSPeter Dunlap in->ttt = ISCSI_RSVD_TASK_TAG; 2550a6d42e7dSPeter Dunlap hton24(in->dlength, resp_datalen); 255160220f10SPriya Krishnan resp->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 2552a6d42e7dSPeter Dunlap /* Any other field in resp to be set? */ 2553a6d42e7dSPeter Dunlap iscsit_pdu_tx(resp); 2554a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2555a6d42e7dSPeter Dunlap } 2556a6d42e7dSPeter Dunlap 2557a6d42e7dSPeter Dunlap static void 2558a6d42e7dSPeter Dunlap iscsit_pdu_op_login_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2559a6d42e7dSPeter Dunlap { 2560a6d42e7dSPeter Dunlap 2561a6d42e7dSPeter Dunlap /* 2562a6d42e7dSPeter Dunlap * Submit PDU to login state machine. State machine will free the 2563a6d42e7dSPeter Dunlap * PDU. 2564a6d42e7dSPeter Dunlap */ 2565a6d42e7dSPeter Dunlap iscsit_login_sm_event(ict, ILE_LOGIN_RCV, rx_pdu); 2566a6d42e7dSPeter Dunlap } 2567a6d42e7dSPeter Dunlap 2568a6d42e7dSPeter Dunlap void 2569a6d42e7dSPeter Dunlap iscsit_pdu_op_logout_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2570a6d42e7dSPeter Dunlap { 2571a6d42e7dSPeter Dunlap iscsi_logout_hdr_t *logout_req = 2572a6d42e7dSPeter Dunlap (iscsi_logout_hdr_t *)rx_pdu->isp_hdr; 2573a6d42e7dSPeter Dunlap iscsi_logout_rsp_hdr_t *logout_rsp; 2574a6d42e7dSPeter Dunlap idm_pdu_t *resp; 2575a6d42e7dSPeter Dunlap 2576a6d42e7dSPeter Dunlap /* Allocate a PDU to respond */ 2577a6d42e7dSPeter Dunlap resp = idm_pdu_alloc(sizeof (iscsi_hdr_t), 0); 2578a6d42e7dSPeter Dunlap idm_pdu_init(resp, ict->ict_ic, NULL, NULL); 257960220f10SPriya Krishnan /* 258060220f10SPriya Krishnan * The StatSN is to be sent to the initiator, 258160220f10SPriya Krishnan * it is not required to increment the number 258260220f10SPriya Krishnan * as the connection is terminating. 258360220f10SPriya Krishnan */ 258460220f10SPriya Krishnan resp->isp_flags |= IDM_PDU_SET_STATSN; 2585a6d42e7dSPeter Dunlap /* 2586a6d42e7dSPeter Dunlap * Logout results in the immediate termination of all tasks except 2587a6d42e7dSPeter Dunlap * if the logout reason is ISCSI_LOGOUT_REASON_RECOVERY. The 2588a6d42e7dSPeter Dunlap * connection state machine will drive this task cleanup automatically 2589a6d42e7dSPeter Dunlap * so we don't need to handle that here. 2590a6d42e7dSPeter Dunlap */ 2591a6d42e7dSPeter Dunlap logout_rsp = (iscsi_logout_rsp_hdr_t *)resp->isp_hdr; 2592a6d42e7dSPeter Dunlap bzero(logout_rsp, sizeof (*logout_rsp)); 2593a6d42e7dSPeter Dunlap logout_rsp->opcode = ISCSI_OP_LOGOUT_RSP; 2594a6d42e7dSPeter Dunlap logout_rsp->flags = ISCSI_FLAG_FINAL; 2595a6d42e7dSPeter Dunlap logout_rsp->itt = logout_req->itt; 2596a6d42e7dSPeter Dunlap if ((logout_req->flags & ISCSI_FLAG_LOGOUT_REASON_MASK) > 2597a6d42e7dSPeter Dunlap ISCSI_LOGOUT_REASON_RECOVERY) { 2598a6d42e7dSPeter Dunlap logout_rsp->response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; 2599a6d42e7dSPeter Dunlap } else { 2600a6d42e7dSPeter Dunlap logout_rsp->response = ISCSI_LOGOUT_SUCCESS; 2601a6d42e7dSPeter Dunlap } 2602a6d42e7dSPeter Dunlap 2603a6d42e7dSPeter Dunlap iscsit_pdu_tx(resp); 2604a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2605a6d42e7dSPeter Dunlap } 2606a6d42e7dSPeter Dunlap 2607a6d42e7dSPeter Dunlap /* 2608a6d42e7dSPeter Dunlap * Calculate the number of outstanding commands we can process 2609a6d42e7dSPeter Dunlap */ 2610a6d42e7dSPeter Dunlap int 2611a6d42e7dSPeter Dunlap iscsit_cmd_window() 2612a6d42e7dSPeter Dunlap { 2613d618d68dSPriya Krishnan /* 2614d618d68dSPriya Krishnan * Instead of using a pre-defined constant for the command window, 2615d618d68dSPriya Krishnan * it should be made confiurable and dynamic. With MC/S, sequence 2616d618d68dSPriya Krishnan * numbers will be used up at a much faster rate than with SC/S. 2617d618d68dSPriya Krishnan */ 2618d618d68dSPriya Krishnan return (ISCSIT_MAX_WINDOW); 2619a6d42e7dSPeter Dunlap } 2620a6d42e7dSPeter Dunlap 2621a6d42e7dSPeter Dunlap /* 2622a6d42e7dSPeter Dunlap * Set local registers based on incoming PDU 2623a6d42e7dSPeter Dunlap */ 2624a6d42e7dSPeter Dunlap void 2625a6d42e7dSPeter Dunlap iscsit_set_cmdsn(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2626a6d42e7dSPeter Dunlap { 2627a6d42e7dSPeter Dunlap iscsit_sess_t *ist; 2628a6d42e7dSPeter Dunlap iscsi_scsi_cmd_hdr_t *req; 2629a6d42e7dSPeter Dunlap 2630a6d42e7dSPeter Dunlap ist = ict->ict_sess; 2631a6d42e7dSPeter Dunlap 2632a6d42e7dSPeter Dunlap req = (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 2633d618d68dSPriya Krishnan if (req->opcode & ISCSI_OP_IMMEDIATE) { 2634d618d68dSPriya Krishnan /* no cmdsn increment for immediate PDUs */ 2635d618d68dSPriya Krishnan return; 2636d618d68dSPriya Krishnan } 2637a6d42e7dSPeter Dunlap 2638d618d68dSPriya Krishnan /* Ensure that the ExpCmdSN advances in an orderly manner */ 2639d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 2640a6d42e7dSPeter Dunlap ist->ist_expcmdsn = ntohl(req->cmdsn) + 1; 2641a6d42e7dSPeter Dunlap ist->ist_maxcmdsn = ntohl(req->cmdsn) + iscsit_cmd_window(); 2642d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 2643a6d42e7dSPeter Dunlap } 2644a6d42e7dSPeter Dunlap 2645a6d42e7dSPeter Dunlap /* 2646a6d42e7dSPeter Dunlap * Wrapper funtion, calls iscsi_calc_rspsn and idm_pdu_tx 2647a6d42e7dSPeter Dunlap */ 2648a6d42e7dSPeter Dunlap void 2649a6d42e7dSPeter Dunlap iscsit_pdu_tx(idm_pdu_t *pdu) 2650a6d42e7dSPeter Dunlap { 2651a6d42e7dSPeter Dunlap iscsit_conn_t *ict = pdu->isp_ic->ic_handle; 265260220f10SPriya Krishnan iscsi_scsi_rsp_hdr_t *rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 265360220f10SPriya Krishnan iscsit_sess_t *ist = ict->ict_sess; 2654a6d42e7dSPeter Dunlap 2655a6d42e7dSPeter Dunlap /* 265660220f10SPriya Krishnan * The command sequence numbers are session-wide and must stay 265760220f10SPriya Krishnan * consistent across the transfer, so protect the cmdsn with a 2658d618d68dSPriya Krishnan * mutex lock on the session. The status sequence number will 265960220f10SPriya Krishnan * be updated just before the transport layer transmits the PDU. 2660a6d42e7dSPeter Dunlap */ 266160220f10SPriya Krishnan 2662d618d68dSPriya Krishnan mutex_enter(&ict->ict_sess->ist_sn_mutex); 266360220f10SPriya Krishnan /* Set ExpCmdSN and MaxCmdSN */ 266460220f10SPriya Krishnan rsp->maxcmdsn = htonl(ist->ist_maxcmdsn); 266560220f10SPriya Krishnan rsp->expcmdsn = htonl(ist->ist_expcmdsn); 2666a6d42e7dSPeter Dunlap idm_pdu_tx(pdu); 2667d618d68dSPriya Krishnan mutex_exit(&ict->ict_sess->ist_sn_mutex); 2668a6d42e7dSPeter Dunlap } 2669a6d42e7dSPeter Dunlap 2670a6d42e7dSPeter Dunlap /* 2671a6d42e7dSPeter Dunlap * Internal functions 2672a6d42e7dSPeter Dunlap */ 2673a6d42e7dSPeter Dunlap 2674a6d42e7dSPeter Dunlap void 2675a6d42e7dSPeter Dunlap iscsit_send_async_event(iscsit_conn_t *ict, uint8_t event) 2676a6d42e7dSPeter Dunlap { 2677a6d42e7dSPeter Dunlap idm_pdu_t *abt; 2678a6d42e7dSPeter Dunlap iscsi_async_evt_hdr_t *async_abt; 2679a6d42e7dSPeter Dunlap 2680a6d42e7dSPeter Dunlap /* 2681a6d42e7dSPeter Dunlap * Get a PDU to build the abort request. 2682a6d42e7dSPeter Dunlap */ 2683a6d42e7dSPeter Dunlap abt = idm_pdu_alloc(sizeof (iscsi_hdr_t), 0); 2684a6d42e7dSPeter Dunlap if (abt == NULL) { 2685a6d42e7dSPeter Dunlap idm_conn_event(ict->ict_ic, CE_TRANSPORT_FAIL, NULL); 2686a6d42e7dSPeter Dunlap return; 2687a6d42e7dSPeter Dunlap } 2688a6d42e7dSPeter Dunlap 268960220f10SPriya Krishnan /* 269060220f10SPriya Krishnan * A asynchronous message is sent by the target to request a logout. 269160220f10SPriya Krishnan * The StatSN for the connection is advanced after the PDU is sent 269260220f10SPriya Krishnan * to allow for initiator and target state synchronization. 269360220f10SPriya Krishnan */ 269472cf3143Speter dunlap idm_pdu_init(abt, ict->ict_ic, NULL, NULL); 2695a6d42e7dSPeter Dunlap abt->isp_datalen = 0; 269660220f10SPriya Krishnan abt->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 2697a6d42e7dSPeter Dunlap 2698a6d42e7dSPeter Dunlap async_abt = (iscsi_async_evt_hdr_t *)abt->isp_hdr; 2699a6d42e7dSPeter Dunlap bzero(async_abt, sizeof (*async_abt)); 2700a6d42e7dSPeter Dunlap async_abt->opcode = ISCSI_OP_ASYNC_EVENT; 2701a6d42e7dSPeter Dunlap async_abt->async_event = event; 2702a6d42e7dSPeter Dunlap async_abt->flags = ISCSI_FLAG_FINAL; 2703a6d42e7dSPeter Dunlap async_abt->rsvd4[0] = 0xff; 2704a6d42e7dSPeter Dunlap async_abt->rsvd4[1] = 0xff; 2705a6d42e7dSPeter Dunlap async_abt->rsvd4[2] = 0xff; 2706a6d42e7dSPeter Dunlap async_abt->rsvd4[3] = 0xff; 2707a6d42e7dSPeter Dunlap 2708a6d42e7dSPeter Dunlap switch (event) { 2709a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_REQUEST_LOGOUT: 2710a6d42e7dSPeter Dunlap async_abt->param3 = htons(IDM_LOGOUT_SECONDS); 2711a6d42e7dSPeter Dunlap break; 2712a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_SCSI_EVENT: 2713a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_DROPPING_CONNECTION: 2714a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_DROPPING_ALL_CONNECTIONS: 2715a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_PARAM_NEGOTIATION: 2716a6d42e7dSPeter Dunlap default: 2717a6d42e7dSPeter Dunlap ASSERT(0); 2718a6d42e7dSPeter Dunlap } 2719a6d42e7dSPeter Dunlap 2720a6d42e7dSPeter Dunlap iscsit_pdu_tx(abt); 2721a6d42e7dSPeter Dunlap } 2722a6d42e7dSPeter Dunlap 272372cf3143Speter dunlap void 272472cf3143Speter dunlap iscsit_send_reject(iscsit_conn_t *ict, idm_pdu_t *rejected_pdu, uint8_t reason) 272572cf3143Speter dunlap { 272672cf3143Speter dunlap idm_pdu_t *reject_pdu; 272772cf3143Speter dunlap iscsi_reject_rsp_hdr_t *reject; 272872cf3143Speter dunlap 272972cf3143Speter dunlap /* 273072cf3143Speter dunlap * Get a PDU to build the abort request. 273172cf3143Speter dunlap */ 273272cf3143Speter dunlap reject_pdu = idm_pdu_alloc(sizeof (iscsi_hdr_t), 273372cf3143Speter dunlap rejected_pdu->isp_hdrlen); 273472cf3143Speter dunlap if (reject_pdu == NULL) { 273572cf3143Speter dunlap idm_conn_event(ict->ict_ic, CE_TRANSPORT_FAIL, NULL); 273672cf3143Speter dunlap return; 273772cf3143Speter dunlap } 273872cf3143Speter dunlap idm_pdu_init(reject_pdu, ict->ict_ic, NULL, NULL); 273960220f10SPriya Krishnan /* StatSN is advanced after a Reject PDU */ 274060220f10SPriya Krishnan reject_pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 274172cf3143Speter dunlap reject_pdu->isp_datalen = rejected_pdu->isp_hdrlen; 274272cf3143Speter dunlap bcopy(rejected_pdu->isp_hdr, reject_pdu->isp_data, 274372cf3143Speter dunlap rejected_pdu->isp_hdrlen); 274472cf3143Speter dunlap 274572cf3143Speter dunlap reject = (iscsi_reject_rsp_hdr_t *)reject_pdu->isp_hdr; 274672cf3143Speter dunlap bzero(reject, sizeof (*reject)); 274772cf3143Speter dunlap reject->opcode = ISCSI_OP_REJECT_MSG; 274872cf3143Speter dunlap reject->reason = reason; 274972cf3143Speter dunlap reject->flags = ISCSI_FLAG_FINAL; 275072cf3143Speter dunlap hton24(reject->dlength, rejected_pdu->isp_hdrlen); 275172cf3143Speter dunlap reject->must_be_ff[0] = 0xff; 275272cf3143Speter dunlap reject->must_be_ff[1] = 0xff; 275372cf3143Speter dunlap reject->must_be_ff[2] = 0xff; 275472cf3143Speter dunlap reject->must_be_ff[3] = 0xff; 275572cf3143Speter dunlap 275672cf3143Speter dunlap iscsit_pdu_tx(reject_pdu); 275772cf3143Speter dunlap } 275872cf3143Speter dunlap 2759a6d42e7dSPeter Dunlap 2760a6d42e7dSPeter Dunlap static iscsit_task_t * 2761a6d42e7dSPeter Dunlap iscsit_task_alloc(iscsit_conn_t *ict) 2762a6d42e7dSPeter Dunlap { 2763a6d42e7dSPeter Dunlap iscsit_task_t *itask; 2764a6d42e7dSPeter Dunlap iscsit_buf_t *immed_ibuf; 2765a6d42e7dSPeter Dunlap 2766a6d42e7dSPeter Dunlap /* 2767a6d42e7dSPeter Dunlap * Possible items to pre-alloc if we cache iscsit_task_t's: 2768a6d42e7dSPeter Dunlap * 2769a6d42e7dSPeter Dunlap * Status PDU w/ sense buffer 2770a6d42e7dSPeter Dunlap * stmf_data_buf_t for immediate data 2771a6d42e7dSPeter Dunlap */ 2772a6d42e7dSPeter Dunlap itask = kmem_alloc(sizeof (iscsit_task_t) + sizeof (iscsit_buf_t) + 2773a6d42e7dSPeter Dunlap sizeof (stmf_data_buf_t), KM_NOSLEEP); 2774a6d42e7dSPeter Dunlap if (itask != NULL) { 2775a6d42e7dSPeter Dunlap mutex_init(&itask->it_mutex, NULL, MUTEX_DRIVER, NULL); 2776a6d42e7dSPeter Dunlap itask->it_aborted = itask->it_stmf_abort = 2777a6d42e7dSPeter Dunlap itask->it_tm_task = 0; 2778a6d42e7dSPeter Dunlap 2779a6d42e7dSPeter Dunlap immed_ibuf = (iscsit_buf_t *)(itask + 1); 2780a6d42e7dSPeter Dunlap bzero(immed_ibuf, sizeof (*immed_ibuf)); 2781a6d42e7dSPeter Dunlap immed_ibuf->ibuf_is_immed = B_TRUE; 2782a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf = (stmf_data_buf_t *)(immed_ibuf + 1); 2783a6d42e7dSPeter Dunlap 2784a6d42e7dSPeter Dunlap bzero(immed_ibuf->ibuf_stmf_buf, sizeof (stmf_data_buf_t)); 2785a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf->db_port_private = immed_ibuf; 2786a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf->db_sglist_length = 1; 2787a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf->db_flags = DB_DIRECTION_FROM_RPORT | 2788a6d42e7dSPeter Dunlap DB_DONT_CACHE; 2789a6d42e7dSPeter Dunlap itask->it_immed_data = immed_ibuf; 2790a6d42e7dSPeter Dunlap itask->it_idm_task = idm_task_alloc(ict->ict_ic); 2791a6d42e7dSPeter Dunlap if (itask->it_idm_task != NULL) { 2792a6d42e7dSPeter Dunlap itask->it_idm_task->idt_private = itask; 2793a6d42e7dSPeter Dunlap itask->it_ict = ict; 2794a6d42e7dSPeter Dunlap itask->it_ttt = itask->it_idm_task->idt_tt; 2795a6d42e7dSPeter Dunlap return (itask); 2796a6d42e7dSPeter Dunlap } else { 2797a6d42e7dSPeter Dunlap kmem_free(itask, sizeof (iscsit_task_t) + 2798a6d42e7dSPeter Dunlap sizeof (iscsit_buf_t) + sizeof (stmf_data_buf_t)); 2799a6d42e7dSPeter Dunlap } 2800a6d42e7dSPeter Dunlap } 2801a6d42e7dSPeter Dunlap 2802a6d42e7dSPeter Dunlap return (NULL); 2803a6d42e7dSPeter Dunlap } 2804a6d42e7dSPeter Dunlap 2805a6d42e7dSPeter Dunlap static void 2806a6d42e7dSPeter Dunlap iscsit_task_free(iscsit_task_t *itask) 2807a6d42e7dSPeter Dunlap { 2808a6d42e7dSPeter Dunlap idm_task_free(itask->it_idm_task); 2809a6d42e7dSPeter Dunlap mutex_destroy(&itask->it_mutex); 2810a6d42e7dSPeter Dunlap kmem_free(itask, sizeof (iscsit_task_t) + 2811a6d42e7dSPeter Dunlap sizeof (iscsit_buf_t) + sizeof (stmf_data_buf_t)); 2812a6d42e7dSPeter Dunlap } 2813a6d42e7dSPeter Dunlap 2814a6d42e7dSPeter Dunlap static iscsit_task_t * 2815a6d42e7dSPeter Dunlap iscsit_tm_task_alloc(iscsit_conn_t *ict) 2816a6d42e7dSPeter Dunlap { 2817a6d42e7dSPeter Dunlap iscsit_task_t *itask; 2818a6d42e7dSPeter Dunlap 2819a6d42e7dSPeter Dunlap itask = kmem_zalloc(sizeof (iscsit_task_t), KM_NOSLEEP); 2820a6d42e7dSPeter Dunlap if (itask != NULL) { 2821a6d42e7dSPeter Dunlap idm_conn_hold(ict->ict_ic); 2822a6d42e7dSPeter Dunlap mutex_init(&itask->it_mutex, NULL, MUTEX_DRIVER, NULL); 2823a6d42e7dSPeter Dunlap itask->it_aborted = itask->it_stmf_abort = 2824a6d42e7dSPeter Dunlap itask->it_tm_responded = 0; 2825a6d42e7dSPeter Dunlap itask->it_tm_pdu = NULL; 2826a6d42e7dSPeter Dunlap itask->it_tm_task = 1; 2827a6d42e7dSPeter Dunlap itask->it_ict = ict; 2828a6d42e7dSPeter Dunlap } 2829a6d42e7dSPeter Dunlap 2830a6d42e7dSPeter Dunlap return (itask); 2831a6d42e7dSPeter Dunlap } 2832a6d42e7dSPeter Dunlap 2833a6d42e7dSPeter Dunlap static void 2834a6d42e7dSPeter Dunlap iscsit_tm_task_free(iscsit_task_t *itask) 2835a6d42e7dSPeter Dunlap { 2836a6d42e7dSPeter Dunlap /* 2837a6d42e7dSPeter Dunlap * If we responded then the call to idm_pdu_complete will free the 2838a6d42e7dSPeter Dunlap * PDU. Otherwise we got aborted before the TM function could 2839a6d42e7dSPeter Dunlap * complete and we need to free the PDU explicitly. 2840a6d42e7dSPeter Dunlap */ 2841a6d42e7dSPeter Dunlap if (itask->it_tm_pdu != NULL && !itask->it_tm_responded) 2842a6d42e7dSPeter Dunlap idm_pdu_free(itask->it_tm_pdu); 2843a6d42e7dSPeter Dunlap idm_conn_rele(itask->it_ict->ict_ic); 2844a6d42e7dSPeter Dunlap mutex_destroy(&itask->it_mutex); 2845a6d42e7dSPeter Dunlap kmem_free(itask, sizeof (iscsit_task_t)); 2846a6d42e7dSPeter Dunlap } 2847a6d42e7dSPeter Dunlap 284872cf3143Speter dunlap static idm_status_t 284972cf3143Speter dunlap iscsit_task_start(iscsit_task_t *itask) 285072cf3143Speter dunlap { 285172cf3143Speter dunlap iscsit_sess_t *ist = itask->it_ict->ict_sess; 285272cf3143Speter dunlap avl_index_t where; 285372cf3143Speter dunlap 285472cf3143Speter dunlap /* 285572cf3143Speter dunlap * Sanity check the ITT and ensure that this task does not already 285672cf3143Speter dunlap * exist. If not then add the task to the session task list. 285772cf3143Speter dunlap */ 285872cf3143Speter dunlap mutex_enter(&ist->ist_mutex); 285972cf3143Speter dunlap mutex_enter(&itask->it_mutex); 286072cf3143Speter dunlap itask->it_active = 1; 286172cf3143Speter dunlap if (avl_find(&ist->ist_task_list, itask, &where) == NULL) { 286272cf3143Speter dunlap /* New task, add to AVL */ 286372cf3143Speter dunlap avl_insert(&ist->ist_task_list, itask, where); 286472cf3143Speter dunlap mutex_exit(&itask->it_mutex); 286572cf3143Speter dunlap mutex_exit(&ist->ist_mutex); 286672cf3143Speter dunlap return (IDM_STATUS_SUCCESS); 286772cf3143Speter dunlap } 286872cf3143Speter dunlap mutex_exit(&itask->it_mutex); 286972cf3143Speter dunlap mutex_exit(&ist->ist_mutex); 287072cf3143Speter dunlap 287172cf3143Speter dunlap return (IDM_STATUS_REJECT); 287272cf3143Speter dunlap } 287372cf3143Speter dunlap 287472cf3143Speter dunlap static void 287572cf3143Speter dunlap iscsit_task_done(iscsit_task_t *itask) 287672cf3143Speter dunlap { 287772cf3143Speter dunlap iscsit_sess_t *ist = itask->it_ict->ict_sess; 287872cf3143Speter dunlap 287972cf3143Speter dunlap mutex_enter(&ist->ist_mutex); 288072cf3143Speter dunlap mutex_enter(&itask->it_mutex); 288172cf3143Speter dunlap if (itask->it_active) { 288272cf3143Speter dunlap avl_remove(&ist->ist_task_list, itask); 288372cf3143Speter dunlap itask->it_active = 0; 288472cf3143Speter dunlap } 288572cf3143Speter dunlap mutex_exit(&itask->it_mutex); 288672cf3143Speter dunlap mutex_exit(&ist->ist_mutex); 288772cf3143Speter dunlap } 288872cf3143Speter dunlap 2889a6d42e7dSPeter Dunlap /* 2890a6d42e7dSPeter Dunlap * iscsit status PDU cache 2891a6d42e7dSPeter Dunlap */ 2892a6d42e7dSPeter Dunlap 2893a6d42e7dSPeter Dunlap /*ARGSUSED*/ 2894a6d42e7dSPeter Dunlap static int 2895a6d42e7dSPeter Dunlap iscsit_status_pdu_constructor(void *pdu_void, void *arg, int flags) 2896a6d42e7dSPeter Dunlap { 2897a6d42e7dSPeter Dunlap idm_pdu_t *pdu = pdu_void; 2898a6d42e7dSPeter Dunlap iscsi_scsi_rsp_hdr_t *rsp; 2899a6d42e7dSPeter Dunlap 2900a6d42e7dSPeter Dunlap bzero(pdu, sizeof (idm_pdu_t)); 2901a6d42e7dSPeter Dunlap pdu->isp_callback = iscsit_send_good_status_done; 2902a6d42e7dSPeter Dunlap pdu->isp_magic = IDM_PDU_MAGIC; 2903a6d42e7dSPeter Dunlap pdu->isp_hdr = (iscsi_hdr_t *)(pdu + 1); /* Ptr arithmetic */ 2904a6d42e7dSPeter Dunlap pdu->isp_hdrlen = sizeof (iscsi_hdr_t); 2905a6d42e7dSPeter Dunlap 2906a6d42e7dSPeter Dunlap /* Setup status response */ 2907a6d42e7dSPeter Dunlap rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 2908a6d42e7dSPeter Dunlap bzero(rsp, sizeof (*rsp)); 2909a6d42e7dSPeter Dunlap rsp->opcode = ISCSI_OP_SCSI_RSP; 2910a6d42e7dSPeter Dunlap rsp->flags = ISCSI_FLAG_FINAL; 2911a6d42e7dSPeter Dunlap rsp->response = ISCSI_STATUS_CMD_COMPLETED; 2912a6d42e7dSPeter Dunlap 2913a6d42e7dSPeter Dunlap return (0); 2914a6d42e7dSPeter Dunlap } 2915a6d42e7dSPeter Dunlap 2916a6d42e7dSPeter Dunlap /* 2917a6d42e7dSPeter Dunlap * iscsit private data handler 2918a6d42e7dSPeter Dunlap */ 2919a6d42e7dSPeter Dunlap 2920a6d42e7dSPeter Dunlap /*ARGSUSED*/ 2921a6d42e7dSPeter Dunlap static void 2922a6d42e7dSPeter Dunlap iscsit_pp_cb(struct stmf_port_provider *pp, int cmd, void *arg, uint32_t flags) 2923a6d42e7dSPeter Dunlap { 2924a6d42e7dSPeter Dunlap it_config_t *cfg; 2925a6d42e7dSPeter Dunlap nvlist_t *nvl; 29268c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_service_enabled_t old_state; 2927a6d42e7dSPeter Dunlap 2928a6d42e7dSPeter Dunlap if ((cmd != STMF_PROVIDER_DATA_UPDATED) || (arg == NULL)) { 2929a6d42e7dSPeter Dunlap return; 2930a6d42e7dSPeter Dunlap } 2931a6d42e7dSPeter Dunlap 2932a6d42e7dSPeter Dunlap nvl = (nvlist_t *)arg; 2933a6d42e7dSPeter Dunlap 2934a6d42e7dSPeter Dunlap /* Translate nvlist */ 2935a6d42e7dSPeter Dunlap if (it_nv_to_config(nvl, &cfg) != 0) { 2936a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "Configuration is invalid"); 2937a6d42e7dSPeter Dunlap return; 2938a6d42e7dSPeter Dunlap } 2939a6d42e7dSPeter Dunlap 29408c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* Check that no iSCSI ioctl is currently running */ 29418c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 29428c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States old_state = iscsit_global.global_svc_state; 29438c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States switch (iscsit_global.global_svc_state) { 29448c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_ENABLED: 29458c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_DISABLED: 29468c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state = ISE_BUSY; 29478c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States break; 29488c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_ENABLING: 29498c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* 29508c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * It is OK for the iscsit_pp_cb to be called from inside of 29518c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * an iSCSI ioctl only if we are currently executing inside 29528c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * of stmf_register_port_provider. 29538c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States */ 29548c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT((flags & STMF_PCB_PREG_COMPLETE) != 0); 29558c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States break; 29568c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States default: 29578c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States cmn_err(CE_WARN, "iscsit_pp_cb called when global_svc_state" 29588c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States " is not ENABLED(0x%x) -- ignoring", 29598c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state); 29608c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 29618c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States it_config_free_cmn(cfg); 29628c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States return; 29638c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States } 29648c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 29658c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 2966a6d42e7dSPeter Dunlap /* Update config */ 2967a6d42e7dSPeter Dunlap (void) iscsit_config_merge(cfg); 2968a6d42e7dSPeter Dunlap 2969a6d42e7dSPeter Dunlap it_config_free_cmn(cfg); 29708c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 29718c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* Restore old iSCSI driver global state */ 29728c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 29738c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT(iscsit_global.global_svc_state == ISE_BUSY || 29748c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state == ISE_ENABLING); 29758c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state = old_state; 29768c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 2977a6d42e7dSPeter Dunlap } 2978a6d42e7dSPeter Dunlap 2979a6d42e7dSPeter Dunlap 2980a6d42e7dSPeter Dunlap static it_cfg_status_t 2981a6d42e7dSPeter Dunlap iscsit_config_merge(it_config_t *in_cfg) 2982a6d42e7dSPeter Dunlap { 2983a6d42e7dSPeter Dunlap it_cfg_status_t status; 2984a6d42e7dSPeter Dunlap it_config_t *cfg; 2985a6d42e7dSPeter Dunlap it_config_t tmp_cfg; 2986a6d42e7dSPeter Dunlap list_t tpg_del_list; 2987a6d42e7dSPeter Dunlap 2988a6d42e7dSPeter Dunlap if (in_cfg) { 2989a6d42e7dSPeter Dunlap cfg = in_cfg; 2990a6d42e7dSPeter Dunlap } else { 2991a6d42e7dSPeter Dunlap /* Make empty config */ 2992a6d42e7dSPeter Dunlap bzero(&tmp_cfg, sizeof (tmp_cfg)); 2993a6d42e7dSPeter Dunlap cfg = &tmp_cfg; 2994a6d42e7dSPeter Dunlap } 2995a6d42e7dSPeter Dunlap 2996a6d42e7dSPeter Dunlap list_create(&tpg_del_list, sizeof (iscsit_tpg_t), 2997a6d42e7dSPeter Dunlap offsetof(iscsit_tpg_t, tpg_delete_ln)); 2998a6d42e7dSPeter Dunlap 2999a6d42e7dSPeter Dunlap /* 3000a6d42e7dSPeter Dunlap * Update targets, initiator contexts, target portal groups, 3001a6d42e7dSPeter Dunlap * and iSNS client 3002a6d42e7dSPeter Dunlap */ 3003a6d42e7dSPeter Dunlap ISCSIT_GLOBAL_LOCK(RW_WRITER); 3004a6d42e7dSPeter Dunlap if (((status = iscsit_config_merge_tpg(cfg, &tpg_del_list)) 3005a6d42e7dSPeter Dunlap != 0) || 3006a6d42e7dSPeter Dunlap ((status = iscsit_config_merge_tgt(cfg)) != 0) || 3007a6d42e7dSPeter Dunlap ((status = iscsit_config_merge_ini(cfg)) != 0) || 3008a6d42e7dSPeter Dunlap ((status = isnst_config_merge(cfg)) != 0)) { 3009a6d42e7dSPeter Dunlap ISCSIT_GLOBAL_UNLOCK(); 3010a6d42e7dSPeter Dunlap return (status); 3011a6d42e7dSPeter Dunlap } 3012a6d42e7dSPeter Dunlap 3013a6d42e7dSPeter Dunlap /* Update other global config parameters */ 3014a6d42e7dSPeter Dunlap if (iscsit_global.global_props) { 3015a6d42e7dSPeter Dunlap nvlist_free(iscsit_global.global_props); 3016a6d42e7dSPeter Dunlap iscsit_global.global_props = NULL; 3017a6d42e7dSPeter Dunlap } 3018a6d42e7dSPeter Dunlap if (in_cfg) { 3019a6d42e7dSPeter Dunlap (void) nvlist_dup(cfg->config_global_properties, 3020a6d42e7dSPeter Dunlap &iscsit_global.global_props, KM_SLEEP); 3021a6d42e7dSPeter Dunlap } 3022a6d42e7dSPeter Dunlap ISCSIT_GLOBAL_UNLOCK(); 3023a6d42e7dSPeter Dunlap 3024a6d42e7dSPeter Dunlap iscsit_config_destroy_tpgs(&tpg_del_list); 3025a6d42e7dSPeter Dunlap 3026a6d42e7dSPeter Dunlap list_destroy(&tpg_del_list); 3027a6d42e7dSPeter Dunlap 3028a6d42e7dSPeter Dunlap return (ITCFG_SUCCESS); 3029a6d42e7dSPeter Dunlap } 3030a6d42e7dSPeter Dunlap 3031a6d42e7dSPeter Dunlap /* 3032a6d42e7dSPeter Dunlap * iscsit_sna_lt[e] 3033a6d42e7dSPeter Dunlap * 3034a6d42e7dSPeter Dunlap * Compare serial numbers using serial number arithmetic as defined in 3035a6d42e7dSPeter Dunlap * RFC 1982. 3036a6d42e7dSPeter Dunlap * 3037ab003da8SJim Dunham * NOTE: This code is duplicated in the isns server. It ought to be common. 3038a6d42e7dSPeter Dunlap */ 3039a6d42e7dSPeter Dunlap 3040a6d42e7dSPeter Dunlap static int 3041a6d42e7dSPeter Dunlap iscsit_sna_lt(uint32_t sn1, uint32_t sn2) 3042a6d42e7dSPeter Dunlap { 3043a6d42e7dSPeter Dunlap return ((sn1 != sn2) && 3044a6d42e7dSPeter Dunlap (((sn1 < sn2) && ((sn2 - sn1) < ISCSIT_SNA32_CHECK)) || 3045a6d42e7dSPeter Dunlap ((sn1 > sn2) && ((sn1 - sn2) > ISCSIT_SNA32_CHECK)))); 3046a6d42e7dSPeter Dunlap } 3047a6d42e7dSPeter Dunlap 3048a6d42e7dSPeter Dunlap static int 3049a6d42e7dSPeter Dunlap iscsit_sna_lte(uint32_t sn1, uint32_t sn2) 3050a6d42e7dSPeter Dunlap { 3051a6d42e7dSPeter Dunlap return ((sn1 == sn2) || 3052a6d42e7dSPeter Dunlap (((sn1 < sn2) && ((sn2 - sn1) < ISCSIT_SNA32_CHECK)) || 3053a6d42e7dSPeter Dunlap ((sn1 > sn2) && ((sn1 - sn2) > ISCSIT_SNA32_CHECK)))); 3054a6d42e7dSPeter Dunlap } 3055a6d42e7dSPeter Dunlap 3056a6d42e7dSPeter Dunlap 3057a6d42e7dSPeter Dunlap static boolean_t 3058a6d42e7dSPeter Dunlap iscsit_cmdsn_in_window(iscsit_conn_t *ict, uint32_t cmdsn) 3059a6d42e7dSPeter Dunlap { 3060a6d42e7dSPeter Dunlap iscsit_sess_t *ist = ict->ict_sess; 3061a6d42e7dSPeter Dunlap int rval = B_TRUE; 3062a6d42e7dSPeter Dunlap 3063a6d42e7dSPeter Dunlap ist = ict->ict_sess; 3064a6d42e7dSPeter Dunlap 3065d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3066a6d42e7dSPeter Dunlap 3067a6d42e7dSPeter Dunlap /* 3068a6d42e7dSPeter Dunlap * If cmdsn is less than ist_expcmdsn - iscsit_cmd_window() or 3069a6d42e7dSPeter Dunlap * greater than ist_expcmdsn, it's not in the window. 3070a6d42e7dSPeter Dunlap */ 3071a6d42e7dSPeter Dunlap 3072a6d42e7dSPeter Dunlap if (iscsit_sna_lt(cmdsn, (ist->ist_expcmdsn - iscsit_cmd_window())) || 3073a6d42e7dSPeter Dunlap !iscsit_sna_lte(cmdsn, ist->ist_expcmdsn)) { 3074a6d42e7dSPeter Dunlap rval = B_FALSE; 3075a6d42e7dSPeter Dunlap } 3076a6d42e7dSPeter Dunlap 3077d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3078a6d42e7dSPeter Dunlap 3079a6d42e7dSPeter Dunlap return (rval); 3080a6d42e7dSPeter Dunlap } 3081d618d68dSPriya Krishnan 3082d618d68dSPriya Krishnan /* 3083d618d68dSPriya Krishnan * iscsit_check_cmdsn_and_queue 3084d618d68dSPriya Krishnan * 3085d618d68dSPriya Krishnan * Independent of the order in which the iSCSI target receives non-immediate 3086d618d68dSPriya Krishnan * command PDU across the entire session and any multiple connections within 3087d618d68dSPriya Krishnan * the session, the target must deliver the commands to the SCSI layer in 3088d618d68dSPriya Krishnan * CmdSN order. So out-of-order non-immediate commands are queued up on a 3089d618d68dSPriya Krishnan * session-wide wait queue. Duplicate commands are ignored. 3090d618d68dSPriya Krishnan * 3091d618d68dSPriya Krishnan */ 3092d618d68dSPriya Krishnan static int 3093d618d68dSPriya Krishnan iscsit_check_cmdsn_and_queue(idm_pdu_t *rx_pdu) 3094d618d68dSPriya Krishnan { 3095d618d68dSPriya Krishnan idm_conn_t *ic = rx_pdu->isp_ic; 3096d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 3097d618d68dSPriya Krishnan iscsit_sess_t *ist = ict->ict_sess; 3098d618d68dSPriya Krishnan iscsi_scsi_cmd_hdr_t *hdr = (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 3099d618d68dSPriya Krishnan 3100d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3101d618d68dSPriya Krishnan if (hdr->opcode & ISCSI_OP_IMMEDIATE) { 3102d618d68dSPriya Krishnan /* do not queue, handle it immediately */ 3103d618d68dSPriya Krishnan DTRACE_PROBE2(immediate__cmd, iscsit_sess_t *, ist, 3104d618d68dSPriya Krishnan idm_pdu_t *, rx_pdu); 3105d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3106d618d68dSPriya Krishnan return (ISCSIT_CMDSN_EQ_EXPCMDSN); 3107d618d68dSPriya Krishnan } 3108d618d68dSPriya Krishnan if (iscsit_sna_lt(ist->ist_expcmdsn, ntohl(hdr->cmdsn))) { 3109d618d68dSPriya Krishnan /* 3110d618d68dSPriya Krishnan * Out-of-order commands (cmdSN higher than ExpCmdSN) 3111d618d68dSPriya Krishnan * are staged on a fixed-size circular buffer until 3112d618d68dSPriya Krishnan * the missing command is delivered to the SCSI layer. 3113d618d68dSPriya Krishnan * Irrespective of the order of insertion into the 3114d618d68dSPriya Krishnan * staging queue, the commands are processed out of the 3115d618d68dSPriya Krishnan * queue in cmdSN order only. 3116d618d68dSPriya Krishnan */ 3117d618d68dSPriya Krishnan rx_pdu->isp_queue_time = ddi_get_time(); 3118d618d68dSPriya Krishnan iscsit_add_pdu_to_queue(ist, rx_pdu); 3119d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3120d618d68dSPriya Krishnan return (ISCSIT_CMDSN_GT_EXPCMDSN); 3121d618d68dSPriya Krishnan } else if (iscsit_sna_lt(ntohl(hdr->cmdsn), ist->ist_expcmdsn)) { 3122d618d68dSPriya Krishnan DTRACE_PROBE3(cmdsn__lt__expcmdsn, iscsit_sess_t *, ist, 3123d618d68dSPriya Krishnan iscsit_conn_t *, ict, idm_pdu_t *, rx_pdu); 3124d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3125d618d68dSPriya Krishnan return (ISCSIT_CMDSN_LT_EXPCMDSN); 3126d618d68dSPriya Krishnan } else { 3127d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3128d618d68dSPriya Krishnan return (ISCSIT_CMDSN_EQ_EXPCMDSN); 3129d618d68dSPriya Krishnan } 3130d618d68dSPriya Krishnan } 3131d618d68dSPriya Krishnan 3132d618d68dSPriya Krishnan /* 3133d618d68dSPriya Krishnan * iscsit_add_pdu_to_queue() adds PDUs into the array indexed by 3134d618d68dSPriya Krishnan * their cmdsn value. The length of the array is kept above the 3135d618d68dSPriya Krishnan * maximum window size. The window keeps the cmdsn within a range 3136d618d68dSPriya Krishnan * such that there are no collisons. e.g. the assumption is that 3137d618d68dSPriya Krishnan * the windowing checks make it impossible to receive PDUs that 3138d618d68dSPriya Krishnan * index into the same location in the array. 3139d618d68dSPriya Krishnan */ 3140d618d68dSPriya Krishnan static void 3141d618d68dSPriya Krishnan iscsit_add_pdu_to_queue(iscsit_sess_t *ist, idm_pdu_t *rx_pdu) 3142d618d68dSPriya Krishnan { 3143d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3144d618d68dSPriya Krishnan iscsit_conn_t *ict = rx_pdu->isp_ic->ic_handle; 3145d618d68dSPriya Krishnan uint32_t cmdsn = 3146d618d68dSPriya Krishnan ((iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr)->cmdsn; 3147d618d68dSPriya Krishnan uint32_t index; 3148d618d68dSPriya Krishnan 3149d618d68dSPriya Krishnan ASSERT(MUTEX_HELD(&ist->ist_sn_mutex)); 3150d618d68dSPriya Krishnan /* 3151d618d68dSPriya Krishnan * If the connection is being torn down, then 3152d618d68dSPriya Krishnan * don't add the PDU to the staging queue 3153d618d68dSPriya Krishnan */ 3154d618d68dSPriya Krishnan mutex_enter(&ict->ict_mutex); 3155d618d68dSPriya Krishnan if (ict->ict_lost) { 3156d618d68dSPriya Krishnan mutex_exit(&ict->ict_mutex); 3157d618d68dSPriya Krishnan idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 3158d618d68dSPriya Krishnan return; 3159d618d68dSPriya Krishnan } 3160d618d68dSPriya Krishnan iscsit_conn_dispatch_hold(ict); 3161d618d68dSPriya Krishnan mutex_exit(&ict->ict_mutex); 3162d618d68dSPriya Krishnan 3163d618d68dSPriya Krishnan index = ntohl(cmdsn) % ISCSIT_RXPDU_QUEUE_LEN; 3164d618d68dSPriya Krishnan ASSERT(cbuf->cb_buffer[index] == NULL); 3165d618d68dSPriya Krishnan cbuf->cb_buffer[index] = rx_pdu; 3166d618d68dSPriya Krishnan cbuf->cb_num_elems++; 3167d618d68dSPriya Krishnan } 3168d618d68dSPriya Krishnan 3169d618d68dSPriya Krishnan static idm_pdu_t * 3170d618d68dSPriya Krishnan iscsit_remove_pdu_from_queue(iscsit_sess_t *ist, uint32_t cmdsn) 3171d618d68dSPriya Krishnan { 3172d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3173d618d68dSPriya Krishnan idm_pdu_t *pdu = NULL; 3174d618d68dSPriya Krishnan uint32_t index; 3175d618d68dSPriya Krishnan 3176d618d68dSPriya Krishnan ASSERT(MUTEX_HELD(&ist->ist_sn_mutex)); 3177d618d68dSPriya Krishnan index = cmdsn % ISCSIT_RXPDU_QUEUE_LEN; 3178d618d68dSPriya Krishnan if ((pdu = cbuf->cb_buffer[index]) != NULL) { 3179d618d68dSPriya Krishnan ASSERT(cmdsn == 3180d618d68dSPriya Krishnan ntohl(((iscsi_scsi_cmd_hdr_t *)pdu->isp_hdr)->cmdsn)); 3181d618d68dSPriya Krishnan cbuf->cb_buffer[index] = NULL; 3182d618d68dSPriya Krishnan cbuf->cb_num_elems--; 3183d618d68dSPriya Krishnan return (pdu); 3184d618d68dSPriya Krishnan } 3185d618d68dSPriya Krishnan return (NULL); 3186d618d68dSPriya Krishnan } 3187d618d68dSPriya Krishnan 3188d618d68dSPriya Krishnan /* 3189d618d68dSPriya Krishnan * iscsit_process_pdu_in_queue() finds the next pdu in sequence 3190d618d68dSPriya Krishnan * and posts it to the SCSI layer 3191d618d68dSPriya Krishnan */ 3192d618d68dSPriya Krishnan static void 3193d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(iscsit_sess_t *ist) 3194d618d68dSPriya Krishnan { 3195d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3196d618d68dSPriya Krishnan idm_pdu_t *pdu = NULL; 3197d618d68dSPriya Krishnan uint32_t expcmdsn; 3198d618d68dSPriya Krishnan 3199d618d68dSPriya Krishnan for (;;) { 3200d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3201d618d68dSPriya Krishnan if (cbuf->cb_num_elems == 0) { 3202d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3203d618d68dSPriya Krishnan break; 3204d618d68dSPriya Krishnan } 3205d618d68dSPriya Krishnan expcmdsn = ist->ist_expcmdsn; 3206d618d68dSPriya Krishnan if ((pdu = iscsit_remove_pdu_from_queue(ist, expcmdsn)) 3207d618d68dSPriya Krishnan == NULL) { 3208d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3209d618d68dSPriya Krishnan break; 3210d618d68dSPriya Krishnan } 3211d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3212d618d68dSPriya Krishnan iscsit_post_staged_pdu(pdu); 3213d618d68dSPriya Krishnan } 3214d618d68dSPriya Krishnan } 3215d618d68dSPriya Krishnan 3216d618d68dSPriya Krishnan static void 3217d618d68dSPriya Krishnan iscsit_post_staged_pdu(idm_pdu_t *rx_pdu) 3218d618d68dSPriya Krishnan { 3219d618d68dSPriya Krishnan iscsit_conn_t *ict = rx_pdu->isp_ic->ic_handle; 3220d618d68dSPriya Krishnan 3221d618d68dSPriya Krishnan /* Post the PDU to the SCSI layer */ 3222d618d68dSPriya Krishnan switch (IDM_PDU_OPCODE(rx_pdu)) { 3223d618d68dSPriya Krishnan case ISCSI_OP_NOOP_OUT: 3224d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3225d618d68dSPriya Krishnan iscsit_pdu_op_noop(ict, rx_pdu); 3226d618d68dSPriya Krishnan break; 3227d618d68dSPriya Krishnan case ISCSI_OP_TEXT_CMD: 3228d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3229d618d68dSPriya Krishnan iscsit_pdu_op_text_cmd(ict, rx_pdu); 3230d618d68dSPriya Krishnan break; 3231d618d68dSPriya Krishnan case ISCSI_OP_SCSI_TASK_MGT_MSG: 3232d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3233d618d68dSPriya Krishnan iscsit_op_scsi_task_mgmt(ict, rx_pdu); 3234d618d68dSPriya Krishnan break; 3235d618d68dSPriya Krishnan case ISCSI_OP_SCSI_CMD: 3236d618d68dSPriya Krishnan /* cmdSN will be incremented after creating itask */ 3237d618d68dSPriya Krishnan iscsit_post_scsi_cmd(rx_pdu->isp_ic, rx_pdu); 3238d618d68dSPriya Krishnan break; 3239d618d68dSPriya Krishnan case ISCSI_OP_LOGOUT_CMD: 3240d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3241d618d68dSPriya Krishnan iscsit_pdu_op_logout_cmd(ict, rx_pdu); 3242d618d68dSPriya Krishnan break; 3243d618d68dSPriya Krishnan default: 3244d618d68dSPriya Krishnan /* No other PDUs should be placed on the queue */ 3245d618d68dSPriya Krishnan ASSERT(0); 3246d618d68dSPriya Krishnan } 3247d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); /* release hold on the conn */ 3248d618d68dSPriya Krishnan } 3249d618d68dSPriya Krishnan 3250d618d68dSPriya Krishnan /* ARGSUSED */ 3251d618d68dSPriya Krishnan void 3252d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_start(void) 3253d618d68dSPriya Krishnan { 3254d618d68dSPriya Krishnan mutex_enter(&iscsit_rxpdu_queue_monitor_mutex); 3255d618d68dSPriya Krishnan if (iscsit_rxpdu_queue_monitor_thr_running) { 3256d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3257d618d68dSPriya Krishnan return; 3258d618d68dSPriya Krishnan } 3259d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_id = 3260d618d68dSPriya Krishnan thread_create(NULL, 0, iscsit_rxpdu_queue_monitor, NULL, 3261d618d68dSPriya Krishnan 0, &p0, TS_RUN, minclsyspri); 3262d618d68dSPriya Krishnan while (!iscsit_rxpdu_queue_monitor_thr_running) { 3263d618d68dSPriya Krishnan cv_wait(&iscsit_rxpdu_queue_monitor_cv, 3264d618d68dSPriya Krishnan &iscsit_rxpdu_queue_monitor_mutex); 3265d618d68dSPriya Krishnan } 3266d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3267d618d68dSPriya Krishnan 3268d618d68dSPriya Krishnan } 3269d618d68dSPriya Krishnan 3270d618d68dSPriya Krishnan /* ARGSUSED */ 3271d618d68dSPriya Krishnan void 3272d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_stop(void) 3273d618d68dSPriya Krishnan { 3274d618d68dSPriya Krishnan mutex_enter(&iscsit_rxpdu_queue_monitor_mutex); 3275d618d68dSPriya Krishnan if (iscsit_rxpdu_queue_monitor_thr_running) { 3276d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_running = B_FALSE; 3277d618d68dSPriya Krishnan cv_signal(&iscsit_rxpdu_queue_monitor_cv); 3278d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3279d618d68dSPriya Krishnan 3280d618d68dSPriya Krishnan thread_join(iscsit_rxpdu_queue_monitor_thr_did); 3281d618d68dSPriya Krishnan return; 3282d618d68dSPriya Krishnan } 3283d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3284d618d68dSPriya Krishnan } 3285d618d68dSPriya Krishnan 3286d618d68dSPriya Krishnan /* 3287d618d68dSPriya Krishnan * A separate thread is used to scan the staging queue on all the 3288d618d68dSPriya Krishnan * sessions, If a delayed PDU does not arrive within a timeout, the 3289d618d68dSPriya Krishnan * target will advance to the staged PDU that is next in sequence 3290d618d68dSPriya Krishnan * and exceeded the threshold wait time. It is up to the initiator 3291d618d68dSPriya Krishnan * to note that the target has not acknowledged a particular cmdsn 3292d618d68dSPriya Krishnan * and take appropriate action. 3293d618d68dSPriya Krishnan */ 3294d618d68dSPriya Krishnan /* ARGSUSED */ 3295d618d68dSPriya Krishnan static void 3296d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor(void *arg) 3297d618d68dSPriya Krishnan { 3298d618d68dSPriya Krishnan iscsit_tgt_t *tgt; 3299d618d68dSPriya Krishnan iscsit_sess_t *ist; 3300d618d68dSPriya Krishnan 3301d618d68dSPriya Krishnan mutex_enter(&iscsit_rxpdu_queue_monitor_mutex); 3302d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_did = curthread->t_did; 3303d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_running = B_TRUE; 3304d618d68dSPriya Krishnan cv_signal(&iscsit_rxpdu_queue_monitor_cv); 3305d618d68dSPriya Krishnan 3306d618d68dSPriya Krishnan while (iscsit_rxpdu_queue_monitor_thr_running) { 3307d618d68dSPriya Krishnan ISCSIT_GLOBAL_LOCK(RW_READER); 3308d618d68dSPriya Krishnan for (tgt = avl_first(&iscsit_global.global_target_list); 3309d618d68dSPriya Krishnan tgt != NULL; 3310d618d68dSPriya Krishnan tgt = AVL_NEXT(&iscsit_global.global_target_list, tgt)) { 3311d618d68dSPriya Krishnan mutex_enter(&tgt->target_mutex); 3312d618d68dSPriya Krishnan for (ist = avl_first(&tgt->target_sess_list); 3313d618d68dSPriya Krishnan ist != NULL; 3314d618d68dSPriya Krishnan ist = AVL_NEXT(&tgt->target_sess_list, ist)) { 3315d618d68dSPriya Krishnan 3316d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_session(ist); 3317d618d68dSPriya Krishnan } 3318d618d68dSPriya Krishnan mutex_exit(&tgt->target_mutex); 3319d618d68dSPriya Krishnan } 3320d618d68dSPriya Krishnan ISCSIT_GLOBAL_UNLOCK(); 3321d618d68dSPriya Krishnan if (iscsit_rxpdu_queue_monitor_thr_running == B_FALSE) { 3322d618d68dSPriya Krishnan break; 3323d618d68dSPriya Krishnan } 3324d618d68dSPriya Krishnan (void) cv_reltimedwait(&iscsit_rxpdu_queue_monitor_cv, 3325d618d68dSPriya Krishnan &iscsit_rxpdu_queue_monitor_mutex, 3326d618d68dSPriya Krishnan ISCSIT_RXPDU_QUEUE_MONITOR_INTERVAL * drv_usectohz(1000000), 3327d618d68dSPriya Krishnan TR_CLOCK_TICK); 3328d618d68dSPriya Krishnan } 3329d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3330d618d68dSPriya Krishnan thread_exit(); 3331d618d68dSPriya Krishnan } 3332d618d68dSPriya Krishnan 3333d618d68dSPriya Krishnan static void 3334d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_session(iscsit_sess_t *ist) 3335d618d68dSPriya Krishnan { 3336d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3337d618d68dSPriya Krishnan idm_pdu_t *next_pdu = NULL; 3338d618d68dSPriya Krishnan uint32_t index, next_cmdsn, i; 3339d618d68dSPriya Krishnan 3340d618d68dSPriya Krishnan /* 3341d618d68dSPriya Krishnan * Assume that all PDUs in the staging queue have a cmdsn >= expcmdsn. 3342d618d68dSPriya Krishnan * Starting with the expcmdsn, iterate over the staged PDUs to find 3343d618d68dSPriya Krishnan * the next PDU with a wait time greater than the threshold. If found 3344d618d68dSPriya Krishnan * advance the staged PDU to the SCSI layer, skipping over the missing 3345d618d68dSPriya Krishnan * PDU(s) to get past the hole in the command sequence. It is up to 3346d618d68dSPriya Krishnan * the initiator to note that the target has not acknowledged a cmdsn 3347d618d68dSPriya Krishnan * and take appropriate action. 3348d618d68dSPriya Krishnan * 3349d618d68dSPriya Krishnan * Since the PDU(s) arrive in any random order, it is possible that 3350d618d68dSPriya Krishnan * that the actual wait time for a particular PDU is much longer than 3351d618d68dSPriya Krishnan * the defined threshold. e.g. Consider a case where commands are sent 3352d618d68dSPriya Krishnan * over 4 different connections, and cmdsn = 1004 arrives first, then 3353d618d68dSPriya Krishnan * 1003, and 1002 and 1001 are lost due to a connection failure. 3354d618d68dSPriya Krishnan * So now 1003 is waiting for 1002 to be delivered, and although the 3355d618d68dSPriya Krishnan * wait time of 1004 > wait time of 1003, only 1003 will be considered 3356d618d68dSPriya Krishnan * by the monitor thread. 1004 will be automatically processed by 3357d618d68dSPriya Krishnan * iscsit_process_pdu_in_queue() once the scan is complete and the 3358d618d68dSPriya Krishnan * expcmdsn becomes current. 3359d618d68dSPriya Krishnan */ 3360d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3361d618d68dSPriya Krishnan cbuf = ist->ist_rxpdu_queue; 3362d618d68dSPriya Krishnan if (cbuf->cb_num_elems == 0) { 3363d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3364d618d68dSPriya Krishnan return; 3365d618d68dSPriya Krishnan } 3366d618d68dSPriya Krishnan for (next_pdu = NULL, i = 0; ; i++) { 3367d618d68dSPriya Krishnan next_cmdsn = ist->ist_expcmdsn + i; /* start at expcmdsn */ 3368d618d68dSPriya Krishnan index = next_cmdsn % ISCSIT_RXPDU_QUEUE_LEN; 3369d618d68dSPriya Krishnan if ((next_pdu = cbuf->cb_buffer[index]) != NULL) { 3370d618d68dSPriya Krishnan /* 3371d618d68dSPriya Krishnan * If the PDU wait time has not exceeded threshold 3372d618d68dSPriya Krishnan * stop scanning the staging queue until the timer 3373d618d68dSPriya Krishnan * fires again 3374d618d68dSPriya Krishnan */ 3375d618d68dSPriya Krishnan if ((ddi_get_time() - next_pdu->isp_queue_time) 3376d618d68dSPriya Krishnan < rxpdu_queue_threshold) { 3377d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3378d618d68dSPriya Krishnan return; 3379d618d68dSPriya Krishnan } 3380d618d68dSPriya Krishnan /* 3381d618d68dSPriya Krishnan * Remove the next PDU from the queue and post it 3382d618d68dSPriya Krishnan * to the SCSI layer, skipping over the missing 3383d618d68dSPriya Krishnan * PDU. Stop scanning the staging queue until 3384d618d68dSPriya Krishnan * the monitor timer fires again 3385d618d68dSPriya Krishnan */ 3386d618d68dSPriya Krishnan (void) iscsit_remove_pdu_from_queue(ist, next_cmdsn); 3387d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3388d618d68dSPriya Krishnan DTRACE_PROBE3(advanced__to__blocked__cmdsn, 3389d618d68dSPriya Krishnan iscsit_sess_t *, ist, idm_pdu_t *, next_pdu, 3390d618d68dSPriya Krishnan uint32_t, next_cmdsn); 3391d618d68dSPriya Krishnan iscsit_post_staged_pdu(next_pdu); 3392d618d68dSPriya Krishnan /* Deliver any subsequent PDUs immediately */ 3393d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(ist); 3394d618d68dSPriya Krishnan return; 3395d618d68dSPriya Krishnan } 3396d618d68dSPriya Krishnan /* 3397d618d68dSPriya Krishnan * Skipping over i PDUs, e.g. a case where commands 1001 and 3398d618d68dSPriya Krishnan * 1002 are lost in the network, skip over both and post 1003 3399d618d68dSPriya Krishnan * expcmdsn then becomes 1004 at the end of the scan. 3400d618d68dSPriya Krishnan */ 3401d618d68dSPriya Krishnan DTRACE_PROBE2(skipping__over__cmdsn, iscsit_sess_t *, ist, 3402d618d68dSPriya Krishnan uint32_t, next_cmdsn); 3403d618d68dSPriya Krishnan } 3404d618d68dSPriya Krishnan /* 3405d618d68dSPriya Krishnan * following the assumption, staged cmdsn >= expcmdsn, this statement 3406d618d68dSPriya Krishnan * is never reached. 3407d618d68dSPriya Krishnan */ 3408d618d68dSPriya Krishnan } 3409