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. 23*3e2514dcSDan McDonald * 24*3e2514dcSDan McDonald * Copyright 2012 Nexenta Systems, Inc. All rights reserved. 256319b0c7SGarrett D'Amore */ 26a6d42e7dSPeter Dunlap 27a6d42e7dSPeter Dunlap #include <sys/cpuvar.h> 28a6d42e7dSPeter Dunlap #include <sys/types.h> 29a6d42e7dSPeter Dunlap #include <sys/conf.h> 30a6d42e7dSPeter Dunlap #include <sys/stat.h> 31a6d42e7dSPeter Dunlap #include <sys/file.h> 32a6d42e7dSPeter Dunlap #include <sys/ddi.h> 33a6d42e7dSPeter Dunlap #include <sys/sunddi.h> 34a6d42e7dSPeter Dunlap #include <sys/modctl.h> 35a6d42e7dSPeter Dunlap #include <sys/sysmacros.h> 36a6d42e7dSPeter Dunlap #include <sys/socket.h> 37a6d42e7dSPeter Dunlap #include <sys/strsubr.h> 38a6d42e7dSPeter Dunlap #include <sys/nvpair.h> 39a6d42e7dSPeter Dunlap 40a6d42e7dSPeter Dunlap #include <sys/stmf.h> 41a6d42e7dSPeter Dunlap #include <sys/stmf_ioctl.h> 42a6d42e7dSPeter Dunlap #include <sys/portif.h> 43a6d42e7dSPeter Dunlap #include <sys/idm/idm.h> 44a6d42e7dSPeter Dunlap #include <sys/idm/idm_conn_sm.h> 454558d122SViswanathan Kannappan 464558d122SViswanathan Kannappan #include "iscsit_isns.h" 474558d122SViswanathan Kannappan #include "iscsit.h" 48a6d42e7dSPeter Dunlap 49a6d42e7dSPeter Dunlap #define ISCSIT_VERSION BUILD_DATE "-1.18dev" 50a6d42e7dSPeter Dunlap #define ISCSIT_NAME_VERSION "COMSTAR ISCSIT v" ISCSIT_VERSION 51a6d42e7dSPeter Dunlap 52a6d42e7dSPeter Dunlap /* 53a6d42e7dSPeter Dunlap * DDI entry points. 54a6d42e7dSPeter Dunlap */ 55a6d42e7dSPeter Dunlap static int iscsit_drv_attach(dev_info_t *, ddi_attach_cmd_t); 56a6d42e7dSPeter Dunlap static int iscsit_drv_detach(dev_info_t *, ddi_detach_cmd_t); 57a6d42e7dSPeter Dunlap static int iscsit_drv_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **); 58a6d42e7dSPeter Dunlap static int iscsit_drv_open(dev_t *, int, int, cred_t *); 59a6d42e7dSPeter Dunlap static int iscsit_drv_close(dev_t, int, int, cred_t *); 60a6d42e7dSPeter Dunlap static boolean_t iscsit_drv_busy(void); 61a6d42e7dSPeter Dunlap static int iscsit_drv_ioctl(dev_t, int, intptr_t, int, cred_t *, int *); 62a6d42e7dSPeter Dunlap 63a6d42e7dSPeter Dunlap extern struct mod_ops mod_miscops; 64a6d42e7dSPeter Dunlap 65a6d42e7dSPeter Dunlap 66a6d42e7dSPeter Dunlap static struct cb_ops iscsit_cb_ops = { 67a6d42e7dSPeter Dunlap iscsit_drv_open, /* cb_open */ 68a6d42e7dSPeter Dunlap iscsit_drv_close, /* cb_close */ 69a6d42e7dSPeter Dunlap nodev, /* cb_strategy */ 70a6d42e7dSPeter Dunlap nodev, /* cb_print */ 71a6d42e7dSPeter Dunlap nodev, /* cb_dump */ 72a6d42e7dSPeter Dunlap nodev, /* cb_read */ 73a6d42e7dSPeter Dunlap nodev, /* cb_write */ 74a6d42e7dSPeter Dunlap iscsit_drv_ioctl, /* cb_ioctl */ 75a6d42e7dSPeter Dunlap nodev, /* cb_devmap */ 76a6d42e7dSPeter Dunlap nodev, /* cb_mmap */ 77a6d42e7dSPeter Dunlap nodev, /* cb_segmap */ 78a6d42e7dSPeter Dunlap nochpoll, /* cb_chpoll */ 79a6d42e7dSPeter Dunlap ddi_prop_op, /* cb_prop_op */ 80a6d42e7dSPeter Dunlap NULL, /* cb_streamtab */ 81a6d42e7dSPeter Dunlap D_MP, /* cb_flag */ 82a6d42e7dSPeter Dunlap CB_REV, /* cb_rev */ 83a6d42e7dSPeter Dunlap nodev, /* cb_aread */ 84a6d42e7dSPeter Dunlap nodev, /* cb_awrite */ 85a6d42e7dSPeter Dunlap }; 86a6d42e7dSPeter Dunlap 87a6d42e7dSPeter Dunlap static struct dev_ops iscsit_dev_ops = { 88a6d42e7dSPeter Dunlap DEVO_REV, /* devo_rev */ 89a6d42e7dSPeter Dunlap 0, /* devo_refcnt */ 90a6d42e7dSPeter Dunlap iscsit_drv_getinfo, /* devo_getinfo */ 91a6d42e7dSPeter Dunlap nulldev, /* devo_identify */ 92a6d42e7dSPeter Dunlap nulldev, /* devo_probe */ 93a6d42e7dSPeter Dunlap iscsit_drv_attach, /* devo_attach */ 94a6d42e7dSPeter Dunlap iscsit_drv_detach, /* devo_detach */ 95a6d42e7dSPeter Dunlap nodev, /* devo_reset */ 96a6d42e7dSPeter Dunlap &iscsit_cb_ops, /* devo_cb_ops */ 97a6d42e7dSPeter Dunlap NULL, /* devo_bus_ops */ 98a6d42e7dSPeter Dunlap NULL, /* devo_power */ 9963528ae4SJames Moore ddi_quiesce_not_needed, /* quiesce */ 100a6d42e7dSPeter Dunlap }; 101a6d42e7dSPeter Dunlap 102a6d42e7dSPeter Dunlap static struct modldrv modldrv = { 103a6d42e7dSPeter Dunlap &mod_driverops, 104a6d42e7dSPeter Dunlap "iSCSI Target", 105a6d42e7dSPeter Dunlap &iscsit_dev_ops, 106a6d42e7dSPeter Dunlap }; 107a6d42e7dSPeter Dunlap 108a6d42e7dSPeter Dunlap static struct modlinkage modlinkage = { 109a6d42e7dSPeter Dunlap MODREV_1, 110a6d42e7dSPeter Dunlap &modldrv, 111a6d42e7dSPeter Dunlap NULL, 112a6d42e7dSPeter Dunlap }; 113a6d42e7dSPeter Dunlap 114a6d42e7dSPeter Dunlap 115a6d42e7dSPeter Dunlap iscsit_global_t iscsit_global; 116a6d42e7dSPeter Dunlap 117a6d42e7dSPeter Dunlap kmem_cache_t *iscsit_status_pdu_cache; 118a6d42e7dSPeter Dunlap 119a6d42e7dSPeter Dunlap boolean_t iscsit_sm_logging = B_FALSE; 120a6d42e7dSPeter Dunlap 1213fc1e17eSPriya Krishnan kmutex_t login_sm_session_mutex; 1223fc1e17eSPriya Krishnan 123a6d42e7dSPeter Dunlap static idm_status_t iscsit_init(dev_info_t *dip); 124a6d42e7dSPeter Dunlap static idm_status_t iscsit_enable_svc(iscsit_hostinfo_t *hostinfo); 125a6d42e7dSPeter Dunlap static void iscsit_disable_svc(void); 126a6d42e7dSPeter Dunlap 127d618d68dSPriya Krishnan static int 128d618d68dSPriya Krishnan iscsit_check_cmdsn_and_queue(idm_pdu_t *rx_pdu); 129d618d68dSPriya Krishnan 130d618d68dSPriya Krishnan static void 131d618d68dSPriya Krishnan iscsit_add_pdu_to_queue(iscsit_sess_t *ist, idm_pdu_t *rx_pdu); 132d618d68dSPriya Krishnan 133d618d68dSPriya Krishnan static idm_pdu_t * 134d618d68dSPriya Krishnan iscsit_remove_pdu_from_queue(iscsit_sess_t *ist, uint32_t cmdsn); 135d618d68dSPriya Krishnan 136d618d68dSPriya Krishnan static void 137d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(iscsit_sess_t *ist); 138d618d68dSPriya Krishnan 139d618d68dSPriya Krishnan static void 140d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_session(iscsit_sess_t *ist); 141d618d68dSPriya Krishnan 142d618d68dSPriya Krishnan static void 143d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor(void *arg); 144d618d68dSPriya Krishnan 145d618d68dSPriya Krishnan static void 146d618d68dSPriya Krishnan iscsit_post_staged_pdu(idm_pdu_t *rx_pdu); 147d618d68dSPriya Krishnan 148d618d68dSPriya Krishnan static void 149d618d68dSPriya Krishnan iscsit_post_scsi_cmd(idm_conn_t *ic, idm_pdu_t *rx_pdu); 150d618d68dSPriya Krishnan 151a6d42e7dSPeter Dunlap static void 152a6d42e7dSPeter Dunlap iscsit_op_scsi_task_mgmt(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 153a6d42e7dSPeter Dunlap 154a6d42e7dSPeter Dunlap static void 155a6d42e7dSPeter Dunlap iscsit_pdu_op_noop(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 156a6d42e7dSPeter Dunlap 157a6d42e7dSPeter Dunlap static void 158a6d42e7dSPeter Dunlap iscsit_pdu_op_login_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 159a6d42e7dSPeter Dunlap 160a6d42e7dSPeter Dunlap void 161a6d42e7dSPeter Dunlap iscsit_pdu_op_text_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 162a6d42e7dSPeter Dunlap 163a6d42e7dSPeter Dunlap static void 164a6d42e7dSPeter Dunlap iscsit_pdu_op_logout_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 165a6d42e7dSPeter Dunlap 166a6d42e7dSPeter Dunlap int iscsit_cmd_window(); 167a6d42e7dSPeter Dunlap 168d618d68dSPriya Krishnan static int 169d618d68dSPriya Krishnan iscsit_sna_lt(uint32_t sn1, uint32_t sn2); 170d618d68dSPriya Krishnan 171a6d42e7dSPeter Dunlap void 172a6d42e7dSPeter Dunlap iscsit_set_cmdsn(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 173a6d42e7dSPeter Dunlap 174a6d42e7dSPeter Dunlap static void 175a6d42e7dSPeter Dunlap iscsit_deferred_dispatch(idm_pdu_t *rx_pdu); 176a6d42e7dSPeter Dunlap 177a6d42e7dSPeter Dunlap static void 178a6d42e7dSPeter Dunlap iscsit_deferred(void *rx_pdu_void); 179a6d42e7dSPeter Dunlap 180a6d42e7dSPeter Dunlap static idm_status_t 181a6d42e7dSPeter Dunlap iscsit_conn_accept(idm_conn_t *ic); 182a6d42e7dSPeter Dunlap 183a6d42e7dSPeter Dunlap static idm_status_t 184a6d42e7dSPeter Dunlap iscsit_ffp_enabled(idm_conn_t *ic); 185a6d42e7dSPeter Dunlap 186a6d42e7dSPeter Dunlap static idm_status_t 187a6d42e7dSPeter Dunlap iscsit_ffp_disabled(idm_conn_t *ic, idm_ffp_disable_t disable_class); 188a6d42e7dSPeter Dunlap 189a6d42e7dSPeter Dunlap static idm_status_t 190a6d42e7dSPeter Dunlap iscsit_conn_lost(idm_conn_t *ic); 191a6d42e7dSPeter Dunlap 192a6d42e7dSPeter Dunlap static idm_status_t 193a6d42e7dSPeter Dunlap iscsit_conn_destroy(idm_conn_t *ic); 194a6d42e7dSPeter Dunlap 195a6d42e7dSPeter Dunlap static stmf_data_buf_t * 196a6d42e7dSPeter Dunlap iscsit_dbuf_alloc(scsi_task_t *task, uint32_t size, uint32_t *pminsize, 197a6d42e7dSPeter Dunlap uint32_t flags); 198a6d42e7dSPeter Dunlap 199a6d42e7dSPeter Dunlap static void 200a6d42e7dSPeter Dunlap iscsit_dbuf_free(stmf_dbuf_store_t *ds, stmf_data_buf_t *dbuf); 201a6d42e7dSPeter Dunlap 202a6d42e7dSPeter Dunlap static void 203a6d42e7dSPeter Dunlap iscsit_buf_xfer_cb(idm_buf_t *idb, idm_status_t status); 204a6d42e7dSPeter Dunlap 205a6d42e7dSPeter Dunlap static void 206a6d42e7dSPeter Dunlap iscsit_send_good_status_done(idm_pdu_t *pdu, idm_status_t status); 207a6d42e7dSPeter Dunlap 208a6d42e7dSPeter Dunlap static void 209a6d42e7dSPeter Dunlap iscsit_send_status_done(idm_pdu_t *pdu, idm_status_t status); 210a6d42e7dSPeter Dunlap 211a6d42e7dSPeter Dunlap static stmf_status_t 212a6d42e7dSPeter Dunlap iscsit_idm_to_stmf(idm_status_t idmrc); 213a6d42e7dSPeter Dunlap 214a6d42e7dSPeter Dunlap static iscsit_task_t * 215a6d42e7dSPeter Dunlap iscsit_task_alloc(iscsit_conn_t *ict); 216a6d42e7dSPeter Dunlap 217a6d42e7dSPeter Dunlap static void 218a6d42e7dSPeter Dunlap iscsit_task_free(iscsit_task_t *itask); 219a6d42e7dSPeter Dunlap 220a6d42e7dSPeter Dunlap static iscsit_task_t * 221a6d42e7dSPeter Dunlap iscsit_tm_task_alloc(iscsit_conn_t *ict); 222a6d42e7dSPeter Dunlap 223a6d42e7dSPeter Dunlap static void 224a6d42e7dSPeter Dunlap iscsit_tm_task_free(iscsit_task_t *itask); 225a6d42e7dSPeter Dunlap 22672cf3143Speter dunlap static idm_status_t 22772cf3143Speter dunlap iscsit_task_start(iscsit_task_t *itask); 22872cf3143Speter dunlap 22972cf3143Speter dunlap static void 23072cf3143Speter dunlap iscsit_task_done(iscsit_task_t *itask); 23172cf3143Speter dunlap 232a6d42e7dSPeter Dunlap static int 233a6d42e7dSPeter Dunlap iscsit_status_pdu_constructor(void *pdu_void, void *arg, int flags); 234a6d42e7dSPeter Dunlap 235a6d42e7dSPeter Dunlap static void 236a6d42e7dSPeter Dunlap iscsit_pp_cb(struct stmf_port_provider *pp, int cmd, void *arg, uint32_t flags); 237a6d42e7dSPeter Dunlap 238a6d42e7dSPeter Dunlap static it_cfg_status_t 239a6d42e7dSPeter Dunlap iscsit_config_merge(it_config_t *cfg); 240a6d42e7dSPeter Dunlap 241a6d42e7dSPeter Dunlap static idm_status_t 242a6d42e7dSPeter Dunlap iscsit_login_fail(idm_conn_t *ic); 243a6d42e7dSPeter Dunlap 24472cf3143Speter dunlap static boolean_t iscsit_cmdsn_in_window(iscsit_conn_t *ict, uint32_t cmdsn); 24572cf3143Speter dunlap static void iscsit_send_direct_scsi_resp(iscsit_conn_t *ict, idm_pdu_t *rx_pdu, 24672cf3143Speter dunlap uint8_t response, uint8_t cmd_status); 24772cf3143Speter dunlap static void iscsit_send_task_mgmt_resp(idm_pdu_t *tm_resp_pdu, 24872cf3143Speter dunlap uint8_t tm_status); 24972cf3143Speter dunlap 250d618d68dSPriya Krishnan /* 251d618d68dSPriya Krishnan * MC/S: Out-of-order commands are staged on a session-wide wait 252d618d68dSPriya Krishnan * queue until a system-tunable threshold is reached. A separate 253d618d68dSPriya Krishnan * thread is used to scan the staging queue on all the session, 254d618d68dSPriya Krishnan * If a delayed PDU does not arrive within a timeout, the target 255d618d68dSPriya Krishnan * will advance to the staged PDU that is next in sequence, skipping 256d618d68dSPriya Krishnan * over the missing PDU(s) to go past a hole in the sequence. 257d618d68dSPriya Krishnan */ 258d618d68dSPriya Krishnan volatile int rxpdu_queue_threshold = ISCSIT_RXPDU_QUEUE_THRESHOLD; 259d618d68dSPriya Krishnan 260d618d68dSPriya Krishnan static kmutex_t iscsit_rxpdu_queue_monitor_mutex; 261d618d68dSPriya Krishnan kthread_t *iscsit_rxpdu_queue_monitor_thr_id; 262d618d68dSPriya Krishnan static kt_did_t iscsit_rxpdu_queue_monitor_thr_did; 263d618d68dSPriya Krishnan static boolean_t iscsit_rxpdu_queue_monitor_thr_running; 264d618d68dSPriya Krishnan static kcondvar_t iscsit_rxpdu_queue_monitor_cv; 265d618d68dSPriya Krishnan 266a6d42e7dSPeter Dunlap int 267a6d42e7dSPeter Dunlap _init(void) 268a6d42e7dSPeter Dunlap { 269a6d42e7dSPeter Dunlap int rc; 270a6d42e7dSPeter Dunlap 271a6d42e7dSPeter Dunlap rw_init(&iscsit_global.global_rwlock, NULL, RW_DRIVER, NULL); 2728c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_init(&iscsit_global.global_state_mutex, NULL, 2738c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States MUTEX_DRIVER, NULL); 274a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DETACHED; 275a6d42e7dSPeter Dunlap 276d618d68dSPriya Krishnan mutex_init(&iscsit_rxpdu_queue_monitor_mutex, NULL, 277d618d68dSPriya Krishnan MUTEX_DRIVER, NULL); 2783fc1e17eSPriya Krishnan mutex_init(&login_sm_session_mutex, NULL, MUTEX_DRIVER, NULL); 279d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_id = NULL; 280d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_running = B_FALSE; 281d618d68dSPriya Krishnan cv_init(&iscsit_rxpdu_queue_monitor_cv, NULL, CV_DEFAULT, NULL); 282d618d68dSPriya Krishnan 283a6d42e7dSPeter Dunlap if ((rc = mod_install(&modlinkage)) != 0) { 2848c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_destroy(&iscsit_global.global_state_mutex); 285a6d42e7dSPeter Dunlap rw_destroy(&iscsit_global.global_rwlock); 286a6d42e7dSPeter Dunlap return (rc); 287a6d42e7dSPeter Dunlap } 288a6d42e7dSPeter Dunlap 289a6d42e7dSPeter Dunlap return (rc); 290a6d42e7dSPeter Dunlap } 291a6d42e7dSPeter Dunlap 292a6d42e7dSPeter Dunlap int 293a6d42e7dSPeter Dunlap _info(struct modinfo *modinfop) 294a6d42e7dSPeter Dunlap { 295a6d42e7dSPeter Dunlap return (mod_info(&modlinkage, modinfop)); 296a6d42e7dSPeter Dunlap } 297a6d42e7dSPeter Dunlap 298a6d42e7dSPeter Dunlap int 299a6d42e7dSPeter Dunlap _fini(void) 300a6d42e7dSPeter Dunlap { 301a6d42e7dSPeter Dunlap int rc; 302a6d42e7dSPeter Dunlap 303a6d42e7dSPeter Dunlap rc = mod_remove(&modlinkage); 304a6d42e7dSPeter Dunlap 305a6d42e7dSPeter Dunlap if (rc == 0) { 306d618d68dSPriya Krishnan mutex_destroy(&iscsit_rxpdu_queue_monitor_mutex); 3073fc1e17eSPriya Krishnan mutex_destroy(&login_sm_session_mutex); 308d618d68dSPriya Krishnan cv_destroy(&iscsit_rxpdu_queue_monitor_cv); 3098c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_destroy(&iscsit_global.global_state_mutex); 310a6d42e7dSPeter Dunlap rw_destroy(&iscsit_global.global_rwlock); 311a6d42e7dSPeter Dunlap } 312a6d42e7dSPeter Dunlap 313a6d42e7dSPeter Dunlap return (rc); 314a6d42e7dSPeter Dunlap } 315a6d42e7dSPeter Dunlap 316a6d42e7dSPeter Dunlap /* 317a6d42e7dSPeter Dunlap * DDI entry points. 318a6d42e7dSPeter Dunlap */ 319a6d42e7dSPeter Dunlap 320a6d42e7dSPeter Dunlap /* ARGSUSED */ 321a6d42e7dSPeter Dunlap static int 322a6d42e7dSPeter Dunlap iscsit_drv_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, 323a6d42e7dSPeter Dunlap void **result) 324a6d42e7dSPeter Dunlap { 325a6d42e7dSPeter Dunlap ulong_t instance = getminor((dev_t)arg); 326a6d42e7dSPeter Dunlap 327a6d42e7dSPeter Dunlap switch (cmd) { 328a6d42e7dSPeter Dunlap case DDI_INFO_DEVT2DEVINFO: 329a6d42e7dSPeter Dunlap *result = iscsit_global.global_dip; 330a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 331a6d42e7dSPeter Dunlap 332a6d42e7dSPeter Dunlap case DDI_INFO_DEVT2INSTANCE: 333a6d42e7dSPeter Dunlap *result = (void *)instance; 334a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 335a6d42e7dSPeter Dunlap 336a6d42e7dSPeter Dunlap default: 337a6d42e7dSPeter Dunlap break; 338a6d42e7dSPeter Dunlap } 339a6d42e7dSPeter Dunlap 340a6d42e7dSPeter Dunlap return (DDI_FAILURE); 341a6d42e7dSPeter Dunlap } 342a6d42e7dSPeter Dunlap 343a6d42e7dSPeter Dunlap static int 344a6d42e7dSPeter Dunlap iscsit_drv_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 345a6d42e7dSPeter Dunlap { 346a6d42e7dSPeter Dunlap if (cmd != DDI_ATTACH) { 347a6d42e7dSPeter Dunlap return (DDI_FAILURE); 348a6d42e7dSPeter Dunlap } 349a6d42e7dSPeter Dunlap 350a6d42e7dSPeter Dunlap if (ddi_get_instance(dip) != 0) { 351a6d42e7dSPeter Dunlap /* we only allow instance 0 to attach */ 352a6d42e7dSPeter Dunlap return (DDI_FAILURE); 353a6d42e7dSPeter Dunlap } 354a6d42e7dSPeter Dunlap 355a6d42e7dSPeter Dunlap /* create the minor node */ 356a6d42e7dSPeter Dunlap if (ddi_create_minor_node(dip, ISCSIT_MODNAME, S_IFCHR, 0, 357a6d42e7dSPeter Dunlap DDI_PSEUDO, 0) != DDI_SUCCESS) { 358a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "iscsit_drv_attach: " 359a6d42e7dSPeter Dunlap "failed creating minor node"); 360a6d42e7dSPeter Dunlap return (DDI_FAILURE); 361a6d42e7dSPeter Dunlap } 362a6d42e7dSPeter Dunlap 363a6d42e7dSPeter Dunlap if (iscsit_init(dip) != IDM_STATUS_SUCCESS) { 364a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "iscsit_drv_attach: " 365a6d42e7dSPeter Dunlap "failed to initialize"); 366a6d42e7dSPeter Dunlap ddi_remove_minor_node(dip, NULL); 367a6d42e7dSPeter Dunlap return (DDI_FAILURE); 368a6d42e7dSPeter Dunlap } 369a6d42e7dSPeter Dunlap 370a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 371a6d42e7dSPeter Dunlap iscsit_global.global_dip = dip; 372a6d42e7dSPeter Dunlap 373a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 374a6d42e7dSPeter Dunlap } 375a6d42e7dSPeter Dunlap 376a6d42e7dSPeter Dunlap /*ARGSUSED*/ 377a6d42e7dSPeter Dunlap static int 378a6d42e7dSPeter Dunlap iscsit_drv_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 379a6d42e7dSPeter Dunlap { 380a6d42e7dSPeter Dunlap if (cmd != DDI_DETACH) 381a6d42e7dSPeter Dunlap return (DDI_FAILURE); 382a6d42e7dSPeter Dunlap 3838c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* 3848c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * drv_detach is called in a context that owns the 3858c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * device node for the /dev/pseudo device. If this thread blocks 3868c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * for any resource, other threads that need the /dev/pseudo device 3878c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * may end up in a deadlock with this thread.Hence, we use a 3888c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * separate lock just for the structures that drv_detach needs 3898c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * to access. 3908c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States */ 3918c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 392a6d42e7dSPeter Dunlap if (iscsit_drv_busy()) { 3938c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 394a6d42e7dSPeter Dunlap return (EBUSY); 395a6d42e7dSPeter Dunlap } 396a6d42e7dSPeter Dunlap 397a6d42e7dSPeter Dunlap iscsit_global.global_dip = NULL; 398a6d42e7dSPeter Dunlap ddi_remove_minor_node(dip, NULL); 399a6d42e7dSPeter Dunlap 400a6d42e7dSPeter Dunlap ldi_ident_release(iscsit_global.global_li); 401a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DETACHED; 402a6d42e7dSPeter Dunlap 4038c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 404a6d42e7dSPeter Dunlap 405a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 406a6d42e7dSPeter Dunlap } 407a6d42e7dSPeter Dunlap 408a6d42e7dSPeter Dunlap /*ARGSUSED*/ 409a6d42e7dSPeter Dunlap static int 410a6d42e7dSPeter Dunlap iscsit_drv_open(dev_t *devp, int flag, int otyp, cred_t *credp) 411a6d42e7dSPeter Dunlap { 412a6d42e7dSPeter Dunlap return (0); 413a6d42e7dSPeter Dunlap } 414a6d42e7dSPeter Dunlap 415a6d42e7dSPeter Dunlap /* ARGSUSED */ 416a6d42e7dSPeter Dunlap static int 417a6d42e7dSPeter Dunlap iscsit_drv_close(dev_t dev, int flag, int otyp, cred_t *credp) 418a6d42e7dSPeter Dunlap { 419a6d42e7dSPeter Dunlap return (0); 420a6d42e7dSPeter Dunlap } 421a6d42e7dSPeter Dunlap 422a6d42e7dSPeter Dunlap static boolean_t 423a6d42e7dSPeter Dunlap iscsit_drv_busy(void) 424a6d42e7dSPeter Dunlap { 4258c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT(MUTEX_HELD(&iscsit_global.global_state_mutex)); 4268c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 427a6d42e7dSPeter Dunlap switch (iscsit_global.global_svc_state) { 428a6d42e7dSPeter Dunlap case ISE_DISABLED: 429a6d42e7dSPeter Dunlap case ISE_DETACHED: 430a6d42e7dSPeter Dunlap return (B_FALSE); 431a6d42e7dSPeter Dunlap default: 432a6d42e7dSPeter Dunlap return (B_TRUE); 433a6d42e7dSPeter Dunlap } 434a6d42e7dSPeter Dunlap /* NOTREACHED */ 435a6d42e7dSPeter Dunlap } 436a6d42e7dSPeter Dunlap 437a6d42e7dSPeter Dunlap /* ARGSUSED */ 438a6d42e7dSPeter Dunlap static int 439a6d42e7dSPeter Dunlap iscsit_drv_ioctl(dev_t drv, int cmd, intptr_t argp, int flag, cred_t *cred, 440a6d42e7dSPeter Dunlap int *retval) 441a6d42e7dSPeter Dunlap { 442a6d42e7dSPeter Dunlap iscsit_ioc_set_config_t setcfg; 443a6d42e7dSPeter Dunlap iscsit_ioc_set_config32_t setcfg32; 44407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States char *cfg_pnvlist = NULL; 44507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States nvlist_t *cfg_nvlist = NULL; 44607a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States it_config_t *cfg = NULL; 447a6d42e7dSPeter Dunlap idm_status_t idmrc; 448a6d42e7dSPeter Dunlap int rc = 0; 449a6d42e7dSPeter Dunlap 450a6d42e7dSPeter Dunlap if (drv_priv(cred) != 0) { 451a6d42e7dSPeter Dunlap return (EPERM); 452a6d42e7dSPeter Dunlap } 453a6d42e7dSPeter Dunlap 4548c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 455a6d42e7dSPeter Dunlap 456a6d42e7dSPeter Dunlap /* 457a6d42e7dSPeter Dunlap * Validate ioctl requests against global service state 458a6d42e7dSPeter Dunlap */ 459a6d42e7dSPeter Dunlap switch (iscsit_global.global_svc_state) { 460a6d42e7dSPeter Dunlap case ISE_ENABLED: 461a6d42e7dSPeter Dunlap if (cmd == ISCSIT_IOC_DISABLE_SVC) { 462a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLING; 463a6d42e7dSPeter Dunlap } else if (cmd == ISCSIT_IOC_ENABLE_SVC) { 464a6d42e7dSPeter Dunlap /* Already enabled */ 4658c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 466a6d42e7dSPeter Dunlap return (0); 467a6d42e7dSPeter Dunlap } else { 468a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_BUSY; 469a6d42e7dSPeter Dunlap } 470a6d42e7dSPeter Dunlap break; 471a6d42e7dSPeter Dunlap case ISE_DISABLED: 472a6d42e7dSPeter Dunlap if (cmd == ISCSIT_IOC_ENABLE_SVC) { 473a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_ENABLING; 474a6d42e7dSPeter Dunlap } else if (cmd == ISCSIT_IOC_DISABLE_SVC) { 475a6d42e7dSPeter Dunlap /* Already disabled */ 4768c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 477a6d42e7dSPeter Dunlap return (0); 478a6d42e7dSPeter Dunlap } else { 479a6d42e7dSPeter Dunlap rc = EFAULT; 480a6d42e7dSPeter Dunlap } 481a6d42e7dSPeter Dunlap break; 4828c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_BUSY: 483a6d42e7dSPeter Dunlap case ISE_ENABLING: 484a6d42e7dSPeter Dunlap case ISE_DISABLING: 485a6d42e7dSPeter Dunlap rc = EAGAIN; 486a6d42e7dSPeter Dunlap break; 487a6d42e7dSPeter Dunlap case ISE_DETACHED: 488a6d42e7dSPeter Dunlap default: 489a6d42e7dSPeter Dunlap rc = EFAULT; 490a6d42e7dSPeter Dunlap break; 491a6d42e7dSPeter Dunlap } 492a6d42e7dSPeter Dunlap 4938c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 494a6d42e7dSPeter Dunlap if (rc != 0) 495a6d42e7dSPeter Dunlap return (rc); 496a6d42e7dSPeter Dunlap 497a6d42e7dSPeter Dunlap /* Handle ioctl request (enable/disable have already been handled) */ 498a6d42e7dSPeter Dunlap switch (cmd) { 499a6d42e7dSPeter Dunlap case ISCSIT_IOC_SET_CONFIG: 50007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* Any errors must set state back to ISE_ENABLED */ 501a6d42e7dSPeter Dunlap switch (ddi_model_convert_from(flag & FMODELS)) { 502a6d42e7dSPeter Dunlap case DDI_MODEL_ILP32: 503a6d42e7dSPeter Dunlap if (ddi_copyin((void *)argp, &setcfg32, 50407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States sizeof (iscsit_ioc_set_config32_t), flag) != 0) { 50507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EFAULT; 50607a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 50707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States } 508a6d42e7dSPeter Dunlap 509a6d42e7dSPeter Dunlap setcfg.set_cfg_pnvlist = 510a6d42e7dSPeter Dunlap (char *)((uintptr_t)setcfg32.set_cfg_pnvlist); 511a6d42e7dSPeter Dunlap setcfg.set_cfg_vers = setcfg32.set_cfg_vers; 512a6d42e7dSPeter Dunlap setcfg.set_cfg_pnvlist_len = 513a6d42e7dSPeter Dunlap setcfg32.set_cfg_pnvlist_len; 514a6d42e7dSPeter Dunlap break; 515a6d42e7dSPeter Dunlap case DDI_MODEL_NONE: 516a6d42e7dSPeter Dunlap if (ddi_copyin((void *)argp, &setcfg, 51707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States sizeof (iscsit_ioc_set_config_t), flag) != 0) { 51807a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EFAULT; 51907a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 52007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States } 521a6d42e7dSPeter Dunlap break; 522fcc214c3SCharles Ting default: 523fcc214c3SCharles Ting rc = EFAULT; 524fcc214c3SCharles Ting goto cleanup; 525a6d42e7dSPeter Dunlap } 526a6d42e7dSPeter Dunlap 527a6d42e7dSPeter Dunlap /* Check API version */ 528a6d42e7dSPeter Dunlap if (setcfg.set_cfg_vers != ISCSIT_API_VERS0) { 52907a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EINVAL; 53007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 531a6d42e7dSPeter Dunlap } 532a6d42e7dSPeter Dunlap 533a6d42e7dSPeter Dunlap /* Config is in packed nvlist format so unpack it */ 534a6d42e7dSPeter Dunlap cfg_pnvlist = kmem_alloc(setcfg.set_cfg_pnvlist_len, 535a6d42e7dSPeter Dunlap KM_SLEEP); 536a6d42e7dSPeter Dunlap ASSERT(cfg_pnvlist != NULL); 537a6d42e7dSPeter Dunlap 538a6d42e7dSPeter Dunlap if (ddi_copyin(setcfg.set_cfg_pnvlist, cfg_pnvlist, 539a6d42e7dSPeter Dunlap setcfg.set_cfg_pnvlist_len, flag) != 0) { 54007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EFAULT; 54107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 542a6d42e7dSPeter Dunlap } 543a6d42e7dSPeter Dunlap 54407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = nvlist_unpack(cfg_pnvlist, setcfg.set_cfg_pnvlist_len, 54507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States &cfg_nvlist, KM_SLEEP); 54607a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (rc != 0) { 54707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 548a6d42e7dSPeter Dunlap } 549a6d42e7dSPeter Dunlap 550a6d42e7dSPeter Dunlap /* Translate nvlist */ 55107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = it_nv_to_config(cfg_nvlist, &cfg); 55207a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (rc != 0) { 553a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "Configuration is invalid"); 55407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 555a6d42e7dSPeter Dunlap } 556a6d42e7dSPeter Dunlap 557a6d42e7dSPeter Dunlap /* Update config */ 55807a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = iscsit_config_merge(cfg); 55907a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* FALLTHROUGH */ 56007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States 56107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States cleanup: 56207a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (cfg) 56307a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States it_config_free_cmn(cfg); 56407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (cfg_pnvlist) 565a6d42e7dSPeter Dunlap kmem_free(cfg_pnvlist, setcfg.set_cfg_pnvlist_len); 56607a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (cfg_nvlist) 567a6d42e7dSPeter Dunlap nvlist_free(cfg_nvlist); 568a6d42e7dSPeter Dunlap 569a6d42e7dSPeter Dunlap /* 570a6d42e7dSPeter Dunlap * Now that the reconfig is complete set our state back to 571a6d42e7dSPeter Dunlap * enabled. 572a6d42e7dSPeter Dunlap */ 5738c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 574a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_ENABLED; 5758c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 576a6d42e7dSPeter Dunlap break; 577a6d42e7dSPeter Dunlap case ISCSIT_IOC_ENABLE_SVC: { 578a6d42e7dSPeter Dunlap iscsit_hostinfo_t hostinfo; 579a6d42e7dSPeter Dunlap 580a6d42e7dSPeter Dunlap if (ddi_copyin((void *)argp, &hostinfo.length, 581a6d42e7dSPeter Dunlap sizeof (hostinfo.length), flag) != 0) { 5828c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 583a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 5848c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 585a6d42e7dSPeter Dunlap return (EFAULT); 586a6d42e7dSPeter Dunlap } 587a6d42e7dSPeter Dunlap 588a6d42e7dSPeter Dunlap if (hostinfo.length > sizeof (hostinfo.fqhn)) 589a6d42e7dSPeter Dunlap hostinfo.length = sizeof (hostinfo.fqhn); 590a6d42e7dSPeter Dunlap 591a6d42e7dSPeter Dunlap if (ddi_copyin((void *)((caddr_t)argp + 592a6d42e7dSPeter Dunlap sizeof (hostinfo.length)), &hostinfo.fqhn, 593a6d42e7dSPeter Dunlap hostinfo.length, flag) != 0) { 5948c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 595a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 5968c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 597a6d42e7dSPeter Dunlap return (EFAULT); 598a6d42e7dSPeter Dunlap } 599a6d42e7dSPeter Dunlap 600a6d42e7dSPeter Dunlap idmrc = iscsit_enable_svc(&hostinfo); 6018c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 602a6d42e7dSPeter Dunlap if (idmrc == IDM_STATUS_SUCCESS) { 603a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_ENABLED; 604a6d42e7dSPeter Dunlap } else { 605a6d42e7dSPeter Dunlap rc = EIO; 606a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 607a6d42e7dSPeter Dunlap } 6088c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 609a6d42e7dSPeter Dunlap break; 610a6d42e7dSPeter Dunlap } 611a6d42e7dSPeter Dunlap case ISCSIT_IOC_DISABLE_SVC: 612a6d42e7dSPeter Dunlap iscsit_disable_svc(); 6138c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 614a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 6158c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 616a6d42e7dSPeter Dunlap break; 61707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States 618a6d42e7dSPeter Dunlap default: 619a6d42e7dSPeter Dunlap rc = EINVAL; 6208c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 62107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state = ISE_ENABLED; 6228c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 623a6d42e7dSPeter Dunlap } 624a6d42e7dSPeter Dunlap 625a6d42e7dSPeter Dunlap return (rc); 626a6d42e7dSPeter Dunlap } 627a6d42e7dSPeter Dunlap 628a6d42e7dSPeter Dunlap static idm_status_t 629a6d42e7dSPeter Dunlap iscsit_init(dev_info_t *dip) 630a6d42e7dSPeter Dunlap { 631a6d42e7dSPeter Dunlap int rc; 632a6d42e7dSPeter Dunlap 633a6d42e7dSPeter Dunlap rc = ldi_ident_from_dip(dip, &iscsit_global.global_li); 634a6d42e7dSPeter Dunlap ASSERT(rc == 0); /* Failure indicates invalid argument */ 635a6d42e7dSPeter Dunlap 636a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 637a6d42e7dSPeter Dunlap 638a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 639a6d42e7dSPeter Dunlap } 640a6d42e7dSPeter Dunlap 641a6d42e7dSPeter Dunlap /* 642a6d42e7dSPeter Dunlap * iscsit_enable_svc 643a6d42e7dSPeter Dunlap * 644a6d42e7dSPeter Dunlap * registers all the configured targets and target portals with STMF 645a6d42e7dSPeter Dunlap */ 646a6d42e7dSPeter Dunlap static idm_status_t 647a6d42e7dSPeter Dunlap iscsit_enable_svc(iscsit_hostinfo_t *hostinfo) 648a6d42e7dSPeter Dunlap { 649a6d42e7dSPeter Dunlap stmf_port_provider_t *pp; 650a6d42e7dSPeter Dunlap stmf_dbuf_store_t *dbuf_store; 651a6d42e7dSPeter Dunlap boolean_t did_iscsit_isns_init; 652a6d42e7dSPeter Dunlap idm_status_t retval = IDM_STATUS_SUCCESS; 653a6d42e7dSPeter Dunlap 654a6d42e7dSPeter Dunlap ASSERT(iscsit_global.global_svc_state == ISE_ENABLING); 655a6d42e7dSPeter Dunlap 656a6d42e7dSPeter Dunlap /* 657a6d42e7dSPeter Dunlap * Make sure that can tell if we have partially allocated 658a6d42e7dSPeter Dunlap * in case we need to exit and tear down anything allocated. 659a6d42e7dSPeter Dunlap */ 660a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = NULL; 661a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = NULL; 662a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = NULL; 663a6d42e7dSPeter Dunlap pp = NULL; 664a6d42e7dSPeter Dunlap iscsit_global.global_pp = NULL; 665a6d42e7dSPeter Dunlap iscsit_global.global_default_tpg = NULL; 666a6d42e7dSPeter Dunlap did_iscsit_isns_init = B_FALSE; 667a6d42e7dSPeter Dunlap iscsit_global.global_dispatch_taskq = NULL; 668a6d42e7dSPeter Dunlap 669a6d42e7dSPeter Dunlap /* Setup remaining fields in iscsit_global_t */ 670a6d42e7dSPeter Dunlap idm_refcnt_init(&iscsit_global.global_refcnt, 671a6d42e7dSPeter Dunlap &iscsit_global); 672a6d42e7dSPeter Dunlap 673a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_discovery_sessions, 674a6d42e7dSPeter Dunlap iscsit_sess_avl_compare, sizeof (iscsit_sess_t), 675a6d42e7dSPeter Dunlap offsetof(iscsit_sess_t, ist_tgt_ln)); 676a6d42e7dSPeter Dunlap 677a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_target_list, 678a6d42e7dSPeter Dunlap iscsit_tgt_avl_compare, sizeof (iscsit_tgt_t), 679a6d42e7dSPeter Dunlap offsetof(iscsit_tgt_t, target_global_ln)); 680a6d42e7dSPeter Dunlap 681a6d42e7dSPeter Dunlap list_create(&iscsit_global.global_deleted_target_list, 682a6d42e7dSPeter Dunlap sizeof (iscsit_tgt_t), 683a6d42e7dSPeter Dunlap offsetof(iscsit_tgt_t, target_global_deleted_ln)); 684a6d42e7dSPeter Dunlap 685a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_tpg_list, 686a6d42e7dSPeter Dunlap iscsit_tpg_avl_compare, sizeof (iscsit_tpg_t), 687a6d42e7dSPeter Dunlap offsetof(iscsit_tpg_t, tpg_global_ln)); 688a6d42e7dSPeter Dunlap 689a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_ini_list, 690a6d42e7dSPeter Dunlap iscsit_ini_avl_compare, sizeof (iscsit_ini_t), 691a6d42e7dSPeter Dunlap offsetof(iscsit_ini_t, ini_global_ln)); 692a6d42e7dSPeter Dunlap 693a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = vmem_create("iscsit_tsih_pool", 694a6d42e7dSPeter Dunlap (void *)1, ISCSI_MAX_TSIH, 1, NULL, NULL, NULL, 0, 695a6d42e7dSPeter Dunlap VM_SLEEP | VMC_IDENTIFIER); 696a6d42e7dSPeter Dunlap 697a6d42e7dSPeter Dunlap /* 698a6d42e7dSPeter Dunlap * Setup STMF dbuf store. Our buffers are bound to a specific 699a6d42e7dSPeter Dunlap * connection so we really can't let STMF cache buffers for us. 700a6d42e7dSPeter Dunlap * Consequently we'll just allocate one global buffer store. 701a6d42e7dSPeter Dunlap */ 702a6d42e7dSPeter Dunlap dbuf_store = stmf_alloc(STMF_STRUCT_DBUF_STORE, 0, 0); 703a6d42e7dSPeter Dunlap if (dbuf_store == NULL) { 704a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 705a6d42e7dSPeter Dunlap goto tear_down_and_return; 706a6d42e7dSPeter Dunlap } 707a6d42e7dSPeter Dunlap dbuf_store->ds_alloc_data_buf = iscsit_dbuf_alloc; 708a6d42e7dSPeter Dunlap dbuf_store->ds_free_data_buf = iscsit_dbuf_free; 709a6d42e7dSPeter Dunlap dbuf_store->ds_port_private = NULL; 710a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = dbuf_store; 711a6d42e7dSPeter Dunlap 712a6d42e7dSPeter Dunlap /* Status PDU cache */ 713a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = kmem_cache_create("iscsit_status_pdu_cache", 714a6d42e7dSPeter Dunlap sizeof (idm_pdu_t) + sizeof (iscsi_scsi_rsp_hdr_t), 8, 715a6d42e7dSPeter Dunlap &iscsit_status_pdu_constructor, 716a6d42e7dSPeter Dunlap NULL, NULL, NULL, NULL, KM_SLEEP); 717a6d42e7dSPeter Dunlap 718a6d42e7dSPeter Dunlap /* Default TPG and portal */ 719a6d42e7dSPeter Dunlap iscsit_global.global_default_tpg = iscsit_tpg_createdefault(); 720a6d42e7dSPeter Dunlap if (iscsit_global.global_default_tpg == NULL) { 721a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 722a6d42e7dSPeter Dunlap goto tear_down_and_return; 723a6d42e7dSPeter Dunlap } 724a6d42e7dSPeter Dunlap 725a6d42e7dSPeter Dunlap /* initialize isns client */ 726a6d42e7dSPeter Dunlap (void) iscsit_isns_init(hostinfo); 727a6d42e7dSPeter Dunlap did_iscsit_isns_init = B_TRUE; 728a6d42e7dSPeter Dunlap 729a6d42e7dSPeter Dunlap /* Register port provider */ 730a6d42e7dSPeter Dunlap pp = stmf_alloc(STMF_STRUCT_PORT_PROVIDER, 0, 0); 731a6d42e7dSPeter Dunlap if (pp == NULL) { 732a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 733a6d42e7dSPeter Dunlap goto tear_down_and_return; 734a6d42e7dSPeter Dunlap } 735a6d42e7dSPeter Dunlap 736a6d42e7dSPeter Dunlap pp->pp_portif_rev = PORTIF_REV_1; 737a6d42e7dSPeter Dunlap pp->pp_instance = 0; 738a6d42e7dSPeter Dunlap pp->pp_name = ISCSIT_MODNAME; 739a6d42e7dSPeter Dunlap pp->pp_cb = iscsit_pp_cb; 740a6d42e7dSPeter Dunlap 741a6d42e7dSPeter Dunlap iscsit_global.global_pp = pp; 742a6d42e7dSPeter Dunlap 743a6d42e7dSPeter Dunlap 744a6d42e7dSPeter Dunlap if (stmf_register_port_provider(pp) != STMF_SUCCESS) { 745a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 746a6d42e7dSPeter Dunlap goto tear_down_and_return; 747a6d42e7dSPeter Dunlap } 748a6d42e7dSPeter Dunlap 749a6d42e7dSPeter Dunlap iscsit_global.global_dispatch_taskq = taskq_create("iscsit_dispatch", 750a6d42e7dSPeter Dunlap 1, minclsyspri, 16, 16, TASKQ_PREPOPULATE); 751a6d42e7dSPeter Dunlap 752d618d68dSPriya Krishnan /* Scan staged PDUs, meaningful in MC/S situations */ 753d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_start(); 754d618d68dSPriya Krishnan 755a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 756a6d42e7dSPeter Dunlap 757a6d42e7dSPeter Dunlap tear_down_and_return: 758a6d42e7dSPeter Dunlap 759a6d42e7dSPeter Dunlap if (iscsit_global.global_dispatch_taskq) { 760a6d42e7dSPeter Dunlap taskq_destroy(iscsit_global.global_dispatch_taskq); 761a6d42e7dSPeter Dunlap iscsit_global.global_dispatch_taskq = NULL; 762a6d42e7dSPeter Dunlap } 763a6d42e7dSPeter Dunlap 764a6d42e7dSPeter Dunlap if (did_iscsit_isns_init) 765a6d42e7dSPeter Dunlap iscsit_isns_fini(); 766a6d42e7dSPeter Dunlap 767a6d42e7dSPeter Dunlap if (iscsit_global.global_default_tpg) { 768a6d42e7dSPeter Dunlap iscsit_tpg_destroydefault(iscsit_global.global_default_tpg); 769a6d42e7dSPeter Dunlap iscsit_global.global_default_tpg = NULL; 770a6d42e7dSPeter Dunlap } 771a6d42e7dSPeter Dunlap 772a6d42e7dSPeter Dunlap if (iscsit_global.global_pp) 773a6d42e7dSPeter Dunlap iscsit_global.global_pp = NULL; 774a6d42e7dSPeter Dunlap 775a6d42e7dSPeter Dunlap if (pp) 776a6d42e7dSPeter Dunlap stmf_free(pp); 777a6d42e7dSPeter Dunlap 778a6d42e7dSPeter Dunlap if (iscsit_status_pdu_cache) { 779a6d42e7dSPeter Dunlap kmem_cache_destroy(iscsit_status_pdu_cache); 780a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = NULL; 781a6d42e7dSPeter Dunlap } 782a6d42e7dSPeter Dunlap 783a6d42e7dSPeter Dunlap if (iscsit_global.global_dbuf_store) { 784a6d42e7dSPeter Dunlap stmf_free(iscsit_global.global_dbuf_store); 785a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = NULL; 786a6d42e7dSPeter Dunlap } 787a6d42e7dSPeter Dunlap 788a6d42e7dSPeter Dunlap if (iscsit_global.global_tsih_pool) { 789a6d42e7dSPeter Dunlap vmem_destroy(iscsit_global.global_tsih_pool); 790a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = NULL; 791a6d42e7dSPeter Dunlap } 792a6d42e7dSPeter Dunlap 793a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_ini_list); 794a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_tpg_list); 795a6d42e7dSPeter Dunlap list_destroy(&iscsit_global.global_deleted_target_list); 796a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_target_list); 797a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_discovery_sessions); 798a6d42e7dSPeter Dunlap 799a6d42e7dSPeter Dunlap idm_refcnt_destroy(&iscsit_global.global_refcnt); 800a6d42e7dSPeter Dunlap 801a6d42e7dSPeter Dunlap return (retval); 802a6d42e7dSPeter Dunlap } 803a6d42e7dSPeter Dunlap 804a6d42e7dSPeter Dunlap /* 805a6d42e7dSPeter Dunlap * iscsit_disable_svc 806a6d42e7dSPeter Dunlap * 807a6d42e7dSPeter Dunlap * clean up all existing connections and deregister targets from STMF 808a6d42e7dSPeter Dunlap */ 809a6d42e7dSPeter Dunlap static void 810a6d42e7dSPeter Dunlap iscsit_disable_svc(void) 811a6d42e7dSPeter Dunlap { 812a6d42e7dSPeter Dunlap iscsit_sess_t *sess; 813a6d42e7dSPeter Dunlap 814a6d42e7dSPeter Dunlap ASSERT(iscsit_global.global_svc_state == ISE_DISABLING); 815a6d42e7dSPeter Dunlap 816d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_stop(); 817d618d68dSPriya Krishnan 818a6d42e7dSPeter Dunlap /* tear down discovery sessions */ 819a6d42e7dSPeter Dunlap for (sess = avl_first(&iscsit_global.global_discovery_sessions); 820a6d42e7dSPeter Dunlap sess != NULL; 821a6d42e7dSPeter Dunlap sess = AVL_NEXT(&iscsit_global.global_discovery_sessions, sess)) 822a6d42e7dSPeter Dunlap iscsit_sess_close(sess); 823a6d42e7dSPeter Dunlap 824a6d42e7dSPeter Dunlap /* 825a6d42e7dSPeter Dunlap * Passing NULL to iscsit_config_merge tells it to go to an empty 826a6d42e7dSPeter Dunlap * config. 827a6d42e7dSPeter Dunlap */ 828a6d42e7dSPeter Dunlap (void) iscsit_config_merge(NULL); 829a6d42e7dSPeter Dunlap 830a6d42e7dSPeter Dunlap /* 831a6d42e7dSPeter Dunlap * Wait until there are no more global references 832a6d42e7dSPeter Dunlap */ 833a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&iscsit_global.global_refcnt); 834a6d42e7dSPeter Dunlap idm_refcnt_destroy(&iscsit_global.global_refcnt); 835a6d42e7dSPeter Dunlap 836a6d42e7dSPeter Dunlap /* 837a6d42e7dSPeter Dunlap * Default TPG must be destroyed after global_refcnt is 0. 838a6d42e7dSPeter Dunlap */ 839a6d42e7dSPeter Dunlap iscsit_tpg_destroydefault(iscsit_global.global_default_tpg); 840a6d42e7dSPeter Dunlap 841a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_discovery_sessions); 842a6d42e7dSPeter Dunlap list_destroy(&iscsit_global.global_deleted_target_list); 843a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_target_list); 844a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_tpg_list); 845a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_ini_list); 846a6d42e7dSPeter Dunlap 847a6d42e7dSPeter Dunlap taskq_destroy(iscsit_global.global_dispatch_taskq); 848a6d42e7dSPeter Dunlap 849a6d42e7dSPeter Dunlap iscsit_isns_fini(); 850a6d42e7dSPeter Dunlap 851a6d42e7dSPeter Dunlap stmf_free(iscsit_global.global_dbuf_store); 852a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = NULL; 853a6d42e7dSPeter Dunlap 854a6d42e7dSPeter Dunlap (void) stmf_deregister_port_provider(iscsit_global.global_pp); 855a6d42e7dSPeter Dunlap stmf_free(iscsit_global.global_pp); 856a6d42e7dSPeter Dunlap iscsit_global.global_pp = NULL; 857a6d42e7dSPeter Dunlap 858a6d42e7dSPeter Dunlap kmem_cache_destroy(iscsit_status_pdu_cache); 859a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = NULL; 860a6d42e7dSPeter Dunlap 861a6d42e7dSPeter Dunlap vmem_destroy(iscsit_global.global_tsih_pool); 862a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = NULL; 863a6d42e7dSPeter Dunlap } 864a6d42e7dSPeter Dunlap 865a6d42e7dSPeter Dunlap void 866a6d42e7dSPeter Dunlap iscsit_global_hold() 867a6d42e7dSPeter Dunlap { 8688c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* 8698c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * To take out a global hold, we must either own the global 8708c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * state mutex or we must be running inside of an ioctl that 8718c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * has set the global state to ISE_BUSY, ISE_DISABLING, or 8728c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * ISE_ENABLING. We don't track the "owner" for these flags, 8738c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * so just checking if they are set is enough for now. 8748c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States */ 8758c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT((iscsit_global.global_svc_state == ISE_ENABLING) || 8768c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States (iscsit_global.global_svc_state == ISE_DISABLING) || 8778c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States (iscsit_global.global_svc_state == ISE_BUSY) || 8788c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States MUTEX_HELD(&iscsit_global.global_state_mutex)); 8798c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 880a6d42e7dSPeter Dunlap idm_refcnt_hold(&iscsit_global.global_refcnt); 881a6d42e7dSPeter Dunlap } 882a6d42e7dSPeter Dunlap 883a6d42e7dSPeter Dunlap void 884a6d42e7dSPeter Dunlap iscsit_global_rele() 885a6d42e7dSPeter Dunlap { 886a6d42e7dSPeter Dunlap idm_refcnt_rele(&iscsit_global.global_refcnt); 887a6d42e7dSPeter Dunlap } 888a6d42e7dSPeter Dunlap 889a6d42e7dSPeter Dunlap void 890a6d42e7dSPeter Dunlap iscsit_global_wait_ref() 891a6d42e7dSPeter Dunlap { 892a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&iscsit_global.global_refcnt); 893a6d42e7dSPeter Dunlap } 894a6d42e7dSPeter Dunlap 895a6d42e7dSPeter Dunlap /* 896a6d42e7dSPeter Dunlap * IDM callbacks 897a6d42e7dSPeter Dunlap */ 898a6d42e7dSPeter Dunlap 899a6d42e7dSPeter Dunlap /*ARGSUSED*/ 900a6d42e7dSPeter Dunlap void 901a6d42e7dSPeter Dunlap iscsit_rx_pdu(idm_conn_t *ic, idm_pdu_t *rx_pdu) 902a6d42e7dSPeter Dunlap { 903a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 904a6d42e7dSPeter Dunlap switch (IDM_PDU_OPCODE(rx_pdu)) { 905a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_CMD: 906a6d42e7dSPeter Dunlap ASSERT(0); /* Shouldn't happen */ 907a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 908a6d42e7dSPeter Dunlap break; 909a6d42e7dSPeter Dunlap case ISCSI_OP_SNACK_CMD: 910a6d42e7dSPeter Dunlap /* 911a6d42e7dSPeter Dunlap * We'll need to handle this when we support ERL1/2. For 912a6d42e7dSPeter Dunlap * now we treat it as a protocol error. 913a6d42e7dSPeter Dunlap */ 914a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 915a6d42e7dSPeter Dunlap idm_conn_event(ic, CE_TRANSPORT_FAIL, NULL); 916a6d42e7dSPeter Dunlap break; 917a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_TASK_MGT_MSG: 918d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 919d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 920d618d68dSPriya Krishnan iscsit_op_scsi_task_mgmt(ict, rx_pdu); 921d618d68dSPriya Krishnan } 922a6d42e7dSPeter Dunlap break; 923a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_OUT: 924a6d42e7dSPeter Dunlap case ISCSI_OP_LOGIN_CMD: 925a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_CMD: 926a6d42e7dSPeter Dunlap case ISCSI_OP_LOGOUT_CMD: 927a6d42e7dSPeter Dunlap /* 928a6d42e7dSPeter Dunlap * If/when we switch to userland processing these PDU's 929a6d42e7dSPeter Dunlap * will be handled by iscsitd. 930a6d42e7dSPeter Dunlap */ 931a6d42e7dSPeter Dunlap iscsit_deferred_dispatch(rx_pdu); 932a6d42e7dSPeter Dunlap break; 933a6d42e7dSPeter Dunlap default: 934a6d42e7dSPeter Dunlap /* Protocol error */ 935a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 936a6d42e7dSPeter Dunlap idm_conn_event(ic, CE_TRANSPORT_FAIL, NULL); 937a6d42e7dSPeter Dunlap break; 938a6d42e7dSPeter Dunlap } 939a6d42e7dSPeter Dunlap } 940a6d42e7dSPeter Dunlap 941a6d42e7dSPeter Dunlap /*ARGSUSED*/ 942a6d42e7dSPeter Dunlap void 943a6d42e7dSPeter Dunlap iscsit_rx_pdu_error(idm_conn_t *ic, idm_pdu_t *rx_pdu, idm_status_t status) 944a6d42e7dSPeter Dunlap { 945a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 946a6d42e7dSPeter Dunlap } 947a6d42e7dSPeter Dunlap 948a6d42e7dSPeter Dunlap void 949a6d42e7dSPeter Dunlap iscsit_task_aborted(idm_task_t *idt, idm_status_t status) 950a6d42e7dSPeter Dunlap { 951a6d42e7dSPeter Dunlap iscsit_task_t *itask = idt->idt_private; 952a6d42e7dSPeter Dunlap 953a6d42e7dSPeter Dunlap switch (status) { 954a6d42e7dSPeter Dunlap case IDM_STATUS_SUSPENDED: 955a6d42e7dSPeter Dunlap break; 956a6d42e7dSPeter Dunlap case IDM_STATUS_ABORTED: 957a6d42e7dSPeter Dunlap mutex_enter(&itask->it_mutex); 958a6d42e7dSPeter Dunlap itask->it_aborted = B_TRUE; 959bf604c64SPeter Dunlap /* 960bf604c64SPeter Dunlap * We rely on the fact that STMF tracks outstanding 961bf604c64SPeter Dunlap * buffer transfers and will free all of our buffers 962bf604c64SPeter Dunlap * before freeing the task so we don't need to 963bf604c64SPeter Dunlap * explicitly free the buffers from iscsit/idm 964bf604c64SPeter Dunlap */ 965a6d42e7dSPeter Dunlap if (itask->it_stmf_abort) { 966a6d42e7dSPeter Dunlap mutex_exit(&itask->it_mutex); 96772cf3143Speter dunlap /* 96872cf3143Speter dunlap * Task is no longer active 96972cf3143Speter dunlap */ 97072cf3143Speter dunlap iscsit_task_done(itask); 97172cf3143Speter dunlap 972a6d42e7dSPeter Dunlap /* 973bf604c64SPeter Dunlap * STMF has already asked for this task to be aborted 974bf604c64SPeter Dunlap * 975a6d42e7dSPeter Dunlap * STMF specification is wrong... says to return 976a6d42e7dSPeter Dunlap * STMF_ABORTED, the code actually looks for 977a6d42e7dSPeter Dunlap * STMF_ABORT_SUCCESS. 978a6d42e7dSPeter Dunlap */ 979a6d42e7dSPeter Dunlap stmf_task_lport_aborted(itask->it_stmf_task, 980a6d42e7dSPeter Dunlap STMF_ABORT_SUCCESS, STMF_IOF_LPORT_DONE); 981a6d42e7dSPeter Dunlap return; 982a6d42e7dSPeter Dunlap } else { 983a6d42e7dSPeter Dunlap mutex_exit(&itask->it_mutex); 984a6d42e7dSPeter Dunlap /* 985bf604c64SPeter Dunlap * Tell STMF to stop processing the task. 986a6d42e7dSPeter Dunlap */ 987a6d42e7dSPeter Dunlap stmf_abort(STMF_QUEUE_TASK_ABORT, itask->it_stmf_task, 988a6d42e7dSPeter Dunlap STMF_ABORTED, NULL); 989a6d42e7dSPeter Dunlap return; 990a6d42e7dSPeter Dunlap } 991a6d42e7dSPeter Dunlap /*NOTREACHED*/ 992a6d42e7dSPeter Dunlap default: 993a6d42e7dSPeter Dunlap ASSERT(0); 994a6d42e7dSPeter Dunlap } 995a6d42e7dSPeter Dunlap } 996a6d42e7dSPeter Dunlap 997a6d42e7dSPeter Dunlap /*ARGSUSED*/ 998a6d42e7dSPeter Dunlap idm_status_t 999a6d42e7dSPeter Dunlap iscsit_client_notify(idm_conn_t *ic, idm_client_notify_t icn, 1000a6d42e7dSPeter Dunlap uintptr_t data) 1001a6d42e7dSPeter Dunlap { 1002a6d42e7dSPeter Dunlap idm_status_t rc = IDM_STATUS_SUCCESS; 1003a6d42e7dSPeter Dunlap 1004a6d42e7dSPeter Dunlap /* 1005a6d42e7dSPeter Dunlap * IDM client notifications will never occur at interrupt level 1006a6d42e7dSPeter Dunlap * since they are generated from the connection state machine which 1007a6d42e7dSPeter Dunlap * running on taskq threads. 1008a6d42e7dSPeter Dunlap * 1009a6d42e7dSPeter Dunlap */ 1010a6d42e7dSPeter Dunlap switch (icn) { 1011a6d42e7dSPeter Dunlap case CN_CONNECT_ACCEPT: 1012a6d42e7dSPeter Dunlap rc = iscsit_conn_accept(ic); /* No data */ 1013a6d42e7dSPeter Dunlap break; 1014a6d42e7dSPeter Dunlap case CN_FFP_ENABLED: 1015a6d42e7dSPeter Dunlap rc = iscsit_ffp_enabled(ic); /* No data */ 1016a6d42e7dSPeter Dunlap break; 1017a6d42e7dSPeter Dunlap case CN_FFP_DISABLED: 1018a6d42e7dSPeter Dunlap /* 1019a6d42e7dSPeter Dunlap * Data indicates whether this was the result of an 1020a6d42e7dSPeter Dunlap * explicit logout request. 1021a6d42e7dSPeter Dunlap */ 1022a6d42e7dSPeter Dunlap rc = iscsit_ffp_disabled(ic, (idm_ffp_disable_t)data); 1023a6d42e7dSPeter Dunlap break; 1024a6d42e7dSPeter Dunlap case CN_CONNECT_LOST: 1025a6d42e7dSPeter Dunlap rc = iscsit_conn_lost(ic); 1026a6d42e7dSPeter Dunlap break; 1027a6d42e7dSPeter Dunlap case CN_CONNECT_DESTROY: 1028a6d42e7dSPeter Dunlap rc = iscsit_conn_destroy(ic); 1029a6d42e7dSPeter Dunlap break; 1030a6d42e7dSPeter Dunlap case CN_LOGIN_FAIL: 1031a6d42e7dSPeter Dunlap /* 1032a6d42e7dSPeter Dunlap * Force the login state machine to completion 1033a6d42e7dSPeter Dunlap */ 1034a6d42e7dSPeter Dunlap rc = iscsit_login_fail(ic); 1035a6d42e7dSPeter Dunlap break; 1036a6d42e7dSPeter Dunlap default: 1037a6d42e7dSPeter Dunlap rc = IDM_STATUS_REJECT; 1038a6d42e7dSPeter Dunlap break; 1039a6d42e7dSPeter Dunlap } 1040a6d42e7dSPeter Dunlap 1041a6d42e7dSPeter Dunlap return (rc); 1042a6d42e7dSPeter Dunlap } 1043a6d42e7dSPeter Dunlap 104460220f10SPriya Krishnan /* 104560220f10SPriya Krishnan * iscsit_update_statsn is invoked for all the PDUs which have the StatSN 104660220f10SPriya Krishnan * field in the header. The StatSN is incremented if the IDM_PDU_ADVANCE_STATSN 104760220f10SPriya Krishnan * flag is set in the pdu flags field. The StatSN is connection-wide and is 104860220f10SPriya Krishnan * protected by the mutex ict_statsn_mutex. For Data-In PDUs, if the flag 104960220f10SPriya Krishnan * IDM_TASK_PHASECOLLAPSE_REQ is set, the status (phase-collapse) is also filled 105060220f10SPriya Krishnan */ 105160220f10SPriya Krishnan void 105260220f10SPriya Krishnan iscsit_update_statsn(idm_task_t *idm_task, idm_pdu_t *pdu) 105360220f10SPriya Krishnan { 105460220f10SPriya Krishnan iscsi_scsi_rsp_hdr_t *rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 105560220f10SPriya Krishnan iscsit_conn_t *ict = (iscsit_conn_t *)pdu->isp_ic->ic_handle; 105660220f10SPriya Krishnan iscsit_task_t *itask = NULL; 105760220f10SPriya Krishnan scsi_task_t *task = NULL; 105860220f10SPriya Krishnan 105960220f10SPriya Krishnan mutex_enter(&ict->ict_statsn_mutex); 106060220f10SPriya Krishnan rsp->statsn = htonl(ict->ict_statsn); 106160220f10SPriya Krishnan if (pdu->isp_flags & IDM_PDU_ADVANCE_STATSN) 106260220f10SPriya Krishnan ict->ict_statsn++; 106360220f10SPriya Krishnan mutex_exit(&ict->ict_statsn_mutex); 106460220f10SPriya Krishnan 106560220f10SPriya Krishnan /* 106660220f10SPriya Krishnan * The last SCSI Data PDU passed for a command may also contain the 106760220f10SPriya Krishnan * status if the status indicates termination with no expections, i.e. 106860220f10SPriya Krishnan * no sense data or response involved. If the command completes with 106960220f10SPriya Krishnan * an error, then the response and sense data will be sent in a 107060220f10SPriya Krishnan * separate iSCSI Response PDU. 107160220f10SPriya Krishnan */ 107260220f10SPriya Krishnan if ((idm_task) && (idm_task->idt_flags & IDM_TASK_PHASECOLLAPSE_REQ)) { 107360220f10SPriya Krishnan itask = idm_task->idt_private; 107460220f10SPriya Krishnan task = itask->it_stmf_task; 107560220f10SPriya Krishnan 107660220f10SPriya Krishnan rsp->cmd_status = task->task_scsi_status; 107760220f10SPriya Krishnan rsp->flags |= ISCSI_FLAG_DATA_STATUS; 107860220f10SPriya Krishnan if (task->task_status_ctrl & TASK_SCTRL_OVER) { 107960220f10SPriya Krishnan rsp->flags |= ISCSI_FLAG_CMD_OVERFLOW; 108060220f10SPriya Krishnan } else if (task->task_status_ctrl & TASK_SCTRL_UNDER) { 108160220f10SPriya Krishnan rsp->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 108260220f10SPriya Krishnan } 108360220f10SPriya Krishnan rsp->residual_count = htonl(task->task_resid); 1084a2383ac5SPriya Krishnan 1085a2383ac5SPriya Krishnan /* 1086a2383ac5SPriya Krishnan * Removing the task from the session task list 1087a2383ac5SPriya Krishnan * just before the status is sent in the last 1088a2383ac5SPriya Krishnan * Data PDU transfer 1089a2383ac5SPriya Krishnan */ 1090a2383ac5SPriya Krishnan iscsit_task_done(itask); 109160220f10SPriya Krishnan } 109260220f10SPriya Krishnan } 1093a6d42e7dSPeter Dunlap 1094a6d42e7dSPeter Dunlap void 1095a6d42e7dSPeter Dunlap iscsit_build_hdr(idm_task_t *idm_task, idm_pdu_t *pdu, uint8_t opcode) 1096a6d42e7dSPeter Dunlap { 1097a6d42e7dSPeter Dunlap iscsit_task_t *itask = idm_task->idt_private; 1098a6d42e7dSPeter Dunlap iscsi_data_rsp_hdr_t *dh = (iscsi_data_rsp_hdr_t *)pdu->isp_hdr; 1099a6d42e7dSPeter Dunlap 1100a6d42e7dSPeter Dunlap /* 1101d618d68dSPriya Krishnan * We acquired iscsit_sess_t.ist_sn_mutex in iscsit_xfer_scsi_data 1102a6d42e7dSPeter Dunlap */ 1103d618d68dSPriya Krishnan ASSERT(MUTEX_HELD(&itask->it_ict->ict_sess->ist_sn_mutex)); 1104a6d42e7dSPeter Dunlap /* 110574f49fd4SPriya Krishnan * On incoming data, the target transfer tag and Lun is only 110674f49fd4SPriya Krishnan * provided by the target if the A bit is set, Since the target 110774f49fd4SPriya Krishnan * does not currently support Error Recovery Level 1, the A 110874f49fd4SPriya Krishnan * bit is never set. 1109a6d42e7dSPeter Dunlap */ 1110a6d42e7dSPeter Dunlap dh->opcode = opcode; 1111a6d42e7dSPeter Dunlap dh->itt = itask->it_itt; 111274f49fd4SPriya Krishnan dh->ttt = ((opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_SCSI_DATA_RSP) ? 111374f49fd4SPriya Krishnan ISCSI_RSVD_TASK_TAG : itask->it_ttt; 111460220f10SPriya Krishnan 1115a6d42e7dSPeter Dunlap dh->expcmdsn = htonl(itask->it_ict->ict_sess->ist_expcmdsn); 1116a6d42e7dSPeter Dunlap dh->maxcmdsn = htonl(itask->it_ict->ict_sess->ist_maxcmdsn); 1117a6d42e7dSPeter Dunlap 1118a6d42e7dSPeter Dunlap /* 1119a6d42e7dSPeter Dunlap * IDM must set: 1120a6d42e7dSPeter Dunlap * 1121a6d42e7dSPeter Dunlap * data.flags and rtt.flags 1122a6d42e7dSPeter Dunlap * data.dlength 1123a6d42e7dSPeter Dunlap * data.datasn 1124a6d42e7dSPeter Dunlap * data.offset 112560220f10SPriya Krishnan * statsn, residual_count and cmd_status (for phase collapse) 1126a6d42e7dSPeter Dunlap * rtt.rttsn 1127a6d42e7dSPeter Dunlap * rtt.data_offset 1128a6d42e7dSPeter Dunlap * rtt.data_length 1129a6d42e7dSPeter Dunlap */ 1130a6d42e7dSPeter Dunlap } 1131a6d42e7dSPeter Dunlap 113272cf3143Speter dunlap void 113372cf3143Speter dunlap iscsit_keepalive(idm_conn_t *ic) 113472cf3143Speter dunlap { 113572cf3143Speter dunlap idm_pdu_t *nop_in_pdu; 113672cf3143Speter dunlap iscsi_nop_in_hdr_t *nop_in; 113772cf3143Speter dunlap iscsit_conn_t *ict = ic->ic_handle; 113872cf3143Speter dunlap 113972cf3143Speter dunlap /* 114072cf3143Speter dunlap * IDM noticed the connection has been idle for too long so it's 114172cf3143Speter dunlap * time to provoke some activity. Build and transmit an iSCSI 114272cf3143Speter dunlap * nop-in PDU -- when the initiator responds it will be counted 114372cf3143Speter dunlap * as "activity" and keep the connection alive. 114472cf3143Speter dunlap * 114572cf3143Speter dunlap * We don't actually care about the response here at the iscsit level 114672cf3143Speter dunlap * so we will just throw it away without looking at it when it arrives. 114772cf3143Speter dunlap */ 114872cf3143Speter dunlap nop_in_pdu = idm_pdu_alloc(sizeof (*nop_in), 0); 114972cf3143Speter dunlap idm_pdu_init(nop_in_pdu, ic, NULL, NULL); 115072cf3143Speter dunlap nop_in = (iscsi_nop_in_hdr_t *)nop_in_pdu->isp_hdr; 115172cf3143Speter dunlap bzero(nop_in, sizeof (*nop_in)); 115272cf3143Speter dunlap nop_in->opcode = ISCSI_OP_NOOP_IN; 115372cf3143Speter dunlap nop_in->flags = ISCSI_FLAG_FINAL; 115472cf3143Speter dunlap nop_in->itt = ISCSI_RSVD_TASK_TAG; 115560220f10SPriya Krishnan /* 115660220f10SPriya Krishnan * When the target sends a NOP-In as a Ping, the target transfer tag 115760220f10SPriya Krishnan * is set to a valid (not reserved) value and the initiator task tag 115860220f10SPriya Krishnan * is set to ISCSI_RSVD_TASK_TAG (0xffffffff). In this case the StatSN 115960220f10SPriya Krishnan * will always contain the next sequence number but the StatSN for the 116060220f10SPriya Krishnan * connection is not advanced after this PDU is sent. 116160220f10SPriya Krishnan */ 116260220f10SPriya Krishnan nop_in_pdu->isp_flags |= IDM_PDU_SET_STATSN; 116372cf3143Speter dunlap /* 116472cf3143Speter dunlap * This works because we don't currently allocate ttt's anywhere else 116572cf3143Speter dunlap * in iscsit so as long as we stay out of IDM's range we are safe. 116672cf3143Speter dunlap * If we need to allocate ttt's for other PDU's in the future this will 116772cf3143Speter dunlap * need to be improved. 116872cf3143Speter dunlap */ 116972cf3143Speter dunlap mutex_enter(&ict->ict_mutex); 117072cf3143Speter dunlap nop_in->ttt = ict->ict_keepalive_ttt; 117172cf3143Speter dunlap ict->ict_keepalive_ttt++; 117272cf3143Speter dunlap if (ict->ict_keepalive_ttt == ISCSI_RSVD_TASK_TAG) 117372cf3143Speter dunlap ict->ict_keepalive_ttt = IDM_TASKIDS_MAX; 117472cf3143Speter dunlap mutex_exit(&ict->ict_mutex); 117572cf3143Speter dunlap 117672cf3143Speter dunlap iscsit_pdu_tx(nop_in_pdu); 117772cf3143Speter dunlap } 117872cf3143Speter dunlap 1179a6d42e7dSPeter Dunlap static idm_status_t 1180a6d42e7dSPeter Dunlap iscsit_conn_accept(idm_conn_t *ic) 1181a6d42e7dSPeter Dunlap { 1182a6d42e7dSPeter Dunlap iscsit_conn_t *ict; 1183a6d42e7dSPeter Dunlap 118430e7468fSPeter Dunlap /* 118530e7468fSPeter Dunlap * We need to get a global hold here to ensure that the service 118630e7468fSPeter Dunlap * doesn't get shutdown prior to establishing a session. This 118730e7468fSPeter Dunlap * gets released in iscsit_conn_destroy(). 118830e7468fSPeter Dunlap */ 11898c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 1190e42a0851Speter dunlap if (iscsit_global.global_svc_state != ISE_ENABLED) { 11918c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 1192e42a0851Speter dunlap return (IDM_STATUS_FAIL); 1193e42a0851Speter dunlap } 119430e7468fSPeter Dunlap iscsit_global_hold(); 11958c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 119630e7468fSPeter Dunlap 1197a6d42e7dSPeter Dunlap /* 1198a6d42e7dSPeter Dunlap * Allocate an associated iscsit structure to represent this 1199a6d42e7dSPeter Dunlap * connection. We shouldn't really create a session until we 1200a6d42e7dSPeter Dunlap * get the first login PDU. 1201a6d42e7dSPeter Dunlap */ 1202a6d42e7dSPeter Dunlap ict = kmem_zalloc(sizeof (*ict), KM_SLEEP); 1203a6d42e7dSPeter Dunlap 1204a6d42e7dSPeter Dunlap ict->ict_ic = ic; 1205a6d42e7dSPeter Dunlap ict->ict_statsn = 1; 120672cf3143Speter dunlap ict->ict_keepalive_ttt = IDM_TASKIDS_MAX; /* Avoid IDM TT range */ 1207a6d42e7dSPeter Dunlap ic->ic_handle = ict; 1208a6d42e7dSPeter Dunlap mutex_init(&ict->ict_mutex, NULL, MUTEX_DRIVER, NULL); 120960220f10SPriya Krishnan mutex_init(&ict->ict_statsn_mutex, NULL, MUTEX_DRIVER, NULL); 1210a6d42e7dSPeter Dunlap idm_refcnt_init(&ict->ict_refcnt, ict); 1211a6d42e7dSPeter Dunlap 1212a6d42e7dSPeter Dunlap /* 1213a6d42e7dSPeter Dunlap * Initialize login state machine 1214a6d42e7dSPeter Dunlap */ 1215a6d42e7dSPeter Dunlap if (iscsit_login_sm_init(ict) != IDM_STATUS_SUCCESS) { 1216e42a0851Speter dunlap iscsit_global_rele(); 12174142b486SJames Moore /* 12184142b486SJames Moore * Cleanup the ict after idm notifies us about this failure 12194142b486SJames Moore */ 1220a6d42e7dSPeter Dunlap return (IDM_STATUS_FAIL); 1221a6d42e7dSPeter Dunlap } 1222a6d42e7dSPeter Dunlap 1223a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1224a6d42e7dSPeter Dunlap } 1225a6d42e7dSPeter Dunlap 1226a6d42e7dSPeter Dunlap idm_status_t 1227a6d42e7dSPeter Dunlap iscsit_conn_reinstate(iscsit_conn_t *reinstate_ict, iscsit_conn_t *new_ict) 1228a6d42e7dSPeter Dunlap { 1229a6d42e7dSPeter Dunlap idm_status_t result; 1230a6d42e7dSPeter Dunlap 1231a6d42e7dSPeter Dunlap /* 1232a6d42e7dSPeter Dunlap * Note in new connection state that this connection is 1233a6d42e7dSPeter Dunlap * reinstating an existing connection. 1234a6d42e7dSPeter Dunlap */ 1235a6d42e7dSPeter Dunlap new_ict->ict_reinstating = B_TRUE; 1236a6d42e7dSPeter Dunlap new_ict->ict_reinstate_conn = reinstate_ict; 1237a6d42e7dSPeter Dunlap new_ict->ict_statsn = reinstate_ict->ict_statsn; 1238a6d42e7dSPeter Dunlap 1239a6d42e7dSPeter Dunlap /* 1240a6d42e7dSPeter Dunlap * Now generate connection state machine event to existing connection 1241a6d42e7dSPeter Dunlap * so that it starts the cleanup process. 1242a6d42e7dSPeter Dunlap */ 1243a6d42e7dSPeter Dunlap result = idm_conn_reinstate_event(reinstate_ict->ict_ic, 1244a6d42e7dSPeter Dunlap new_ict->ict_ic); 1245a6d42e7dSPeter Dunlap 1246a6d42e7dSPeter Dunlap return (result); 1247a6d42e7dSPeter Dunlap } 1248a6d42e7dSPeter Dunlap 1249a6d42e7dSPeter Dunlap void 1250a6d42e7dSPeter Dunlap iscsit_conn_hold(iscsit_conn_t *ict) 1251a6d42e7dSPeter Dunlap { 1252a6d42e7dSPeter Dunlap idm_refcnt_hold(&ict->ict_refcnt); 1253a6d42e7dSPeter Dunlap } 1254a6d42e7dSPeter Dunlap 1255a6d42e7dSPeter Dunlap void 1256a6d42e7dSPeter Dunlap iscsit_conn_rele(iscsit_conn_t *ict) 1257a6d42e7dSPeter Dunlap { 1258a6d42e7dSPeter Dunlap idm_refcnt_rele(&ict->ict_refcnt); 1259a6d42e7dSPeter Dunlap } 1260a6d42e7dSPeter Dunlap 1261a6d42e7dSPeter Dunlap void 1262a6d42e7dSPeter Dunlap iscsit_conn_dispatch_hold(iscsit_conn_t *ict) 1263a6d42e7dSPeter Dunlap { 1264a6d42e7dSPeter Dunlap idm_refcnt_hold(&ict->ict_dispatch_refcnt); 1265a6d42e7dSPeter Dunlap } 1266a6d42e7dSPeter Dunlap 1267a6d42e7dSPeter Dunlap void 1268a6d42e7dSPeter Dunlap iscsit_conn_dispatch_rele(iscsit_conn_t *ict) 1269a6d42e7dSPeter Dunlap { 1270a6d42e7dSPeter Dunlap idm_refcnt_rele(&ict->ict_dispatch_refcnt); 1271a6d42e7dSPeter Dunlap } 1272a6d42e7dSPeter Dunlap 1273a6d42e7dSPeter Dunlap static idm_status_t 1274a6d42e7dSPeter Dunlap iscsit_login_fail(idm_conn_t *ic) 1275a6d42e7dSPeter Dunlap { 1276a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1277a6d42e7dSPeter Dunlap 1278a6d42e7dSPeter Dunlap /* Generate login state machine event */ 1279a6d42e7dSPeter Dunlap iscsit_login_sm_event(ict, ILE_LOGIN_CONN_ERROR, NULL); 1280a6d42e7dSPeter Dunlap 1281a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1282a6d42e7dSPeter Dunlap } 1283a6d42e7dSPeter Dunlap 1284a6d42e7dSPeter Dunlap static idm_status_t 1285a6d42e7dSPeter Dunlap iscsit_ffp_enabled(idm_conn_t *ic) 1286a6d42e7dSPeter Dunlap { 1287a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1288a6d42e7dSPeter Dunlap 1289a6d42e7dSPeter Dunlap /* Generate session state machine event */ 1290a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_LOGGED_IN, ict); 1291a6d42e7dSPeter Dunlap 1292a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1293a6d42e7dSPeter Dunlap } 1294a6d42e7dSPeter Dunlap 1295a6d42e7dSPeter Dunlap static idm_status_t 1296a6d42e7dSPeter Dunlap iscsit_ffp_disabled(idm_conn_t *ic, idm_ffp_disable_t disable_class) 1297a6d42e7dSPeter Dunlap { 1298a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1299a6d42e7dSPeter Dunlap 1300a6d42e7dSPeter Dunlap /* Generate session state machine event */ 1301a6d42e7dSPeter Dunlap switch (disable_class) { 1302a6d42e7dSPeter Dunlap case FD_CONN_FAIL: 1303a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_FFP_FAIL, ict); 1304a6d42e7dSPeter Dunlap break; 1305a6d42e7dSPeter Dunlap case FD_CONN_LOGOUT: 1306a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_FFP_DISABLE, ict); 1307a6d42e7dSPeter Dunlap break; 1308a6d42e7dSPeter Dunlap case FD_SESS_LOGOUT: 1309a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_SESSION_CLOSE, ict); 1310a6d42e7dSPeter Dunlap break; 1311a6d42e7dSPeter Dunlap default: 1312a6d42e7dSPeter Dunlap ASSERT(0); 1313a6d42e7dSPeter Dunlap } 1314a6d42e7dSPeter Dunlap 1315a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1316a6d42e7dSPeter Dunlap } 1317a6d42e7dSPeter Dunlap 1318a6d42e7dSPeter Dunlap static idm_status_t 1319a6d42e7dSPeter Dunlap iscsit_conn_lost(idm_conn_t *ic) 1320a6d42e7dSPeter Dunlap { 1321d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 1322d618d68dSPriya Krishnan iscsit_sess_t *ist = ict->ict_sess; 1323d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf; 1324d618d68dSPriya Krishnan idm_pdu_t *rx_pdu; 1325d618d68dSPriya Krishnan int i; 1326a6d42e7dSPeter Dunlap 1327a6d42e7dSPeter Dunlap mutex_enter(&ict->ict_mutex); 1328a6d42e7dSPeter Dunlap ict->ict_lost = B_TRUE; 1329a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 1330d618d68dSPriya Krishnan /* 1331d618d68dSPriya Krishnan * scrub the staging queue for all PDUs on this connection 1332d618d68dSPriya Krishnan */ 1333d618d68dSPriya Krishnan if (ist != NULL) { 1334d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 1335d618d68dSPriya Krishnan for (cbuf = ist->ist_rxpdu_queue, i = 0; 1336d618d68dSPriya Krishnan ((cbuf->cb_num_elems > 0) && (i < ISCSIT_RXPDU_QUEUE_LEN)); 1337d618d68dSPriya Krishnan i++) { 1338d618d68dSPriya Krishnan if (((rx_pdu = cbuf->cb_buffer[i]) != NULL) && 1339d618d68dSPriya Krishnan (rx_pdu->isp_ic == ic)) { 1340d618d68dSPriya Krishnan /* conn is lost, drop the pdu */ 1341d618d68dSPriya Krishnan DTRACE_PROBE3(scrubbing__staging__queue, 1342d618d68dSPriya Krishnan iscsit_sess_t *, ist, idm_conn_t *, ic, 1343d618d68dSPriya Krishnan idm_pdu_t *, rx_pdu); 1344d618d68dSPriya Krishnan idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 1345d618d68dSPriya Krishnan cbuf->cb_buffer[i] = NULL; 1346d618d68dSPriya Krishnan cbuf->cb_num_elems--; 1347d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); 1348d618d68dSPriya Krishnan } 1349d618d68dSPriya Krishnan } 1350d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 1351d618d68dSPriya Krishnan } 1352a6d42e7dSPeter Dunlap /* 1353a6d42e7dSPeter Dunlap * Make sure there aren't any PDU's transitioning from the receive 1354a6d42e7dSPeter Dunlap * handler to the dispatch taskq. 1355a6d42e7dSPeter Dunlap */ 1356a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&ict->ict_dispatch_refcnt); 1357a6d42e7dSPeter Dunlap 1358a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1359a6d42e7dSPeter Dunlap } 1360a6d42e7dSPeter Dunlap 1361a6d42e7dSPeter Dunlap static idm_status_t 1362a6d42e7dSPeter Dunlap iscsit_conn_destroy(idm_conn_t *ic) 1363a6d42e7dSPeter Dunlap { 1364a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1365a6d42e7dSPeter Dunlap 1366a6d42e7dSPeter Dunlap mutex_enter(&ict->ict_mutex); 1367a6d42e7dSPeter Dunlap ict->ict_destroyed = B_TRUE; 1368a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 1369a6d42e7dSPeter Dunlap 1370a6d42e7dSPeter Dunlap /* Generate session state machine event */ 1371a6d42e7dSPeter Dunlap if (ict->ict_sess != NULL) { 1372a6d42e7dSPeter Dunlap /* 1373a6d42e7dSPeter Dunlap * Session state machine will call iscsit_conn_destroy_done() 1374a6d42e7dSPeter Dunlap * when it has removed references to this connection. 1375a6d42e7dSPeter Dunlap */ 1376a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_FAIL, ict); 1377a6d42e7dSPeter Dunlap } 1378a6d42e7dSPeter Dunlap 1379a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&ict->ict_refcnt); 138047715e7fSPriya Krishnan /* 138147715e7fSPriya Krishnan * The session state machine does not need to post 138247715e7fSPriya Krishnan * events to IDM any longer, so it is safe to set 138347715e7fSPriya Krishnan * the idm connection reference to NULL 138447715e7fSPriya Krishnan */ 138547715e7fSPriya Krishnan ict->ict_ic = NULL; 1386a6d42e7dSPeter Dunlap 13874142b486SJames Moore /* Reap the login state machine */ 13884142b486SJames Moore iscsit_login_sm_fini(ict); 13894142b486SJames Moore 13904142b486SJames Moore /* Clean up any text command remnants */ 13914142b486SJames Moore iscsit_text_cmd_fini(ict); 13924142b486SJames Moore 1393a6d42e7dSPeter Dunlap mutex_destroy(&ict->ict_mutex); 1394a6d42e7dSPeter Dunlap idm_refcnt_destroy(&ict->ict_refcnt); 1395a6d42e7dSPeter Dunlap kmem_free(ict, sizeof (*ict)); 1396a6d42e7dSPeter Dunlap 139730e7468fSPeter Dunlap iscsit_global_rele(); 139830e7468fSPeter Dunlap 1399a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1400a6d42e7dSPeter Dunlap } 1401a6d42e7dSPeter Dunlap 140247715e7fSPriya Krishnan void 140347715e7fSPriya Krishnan iscsit_conn_logout(iscsit_conn_t *ict) 140447715e7fSPriya Krishnan { 140547715e7fSPriya Krishnan /* 140647715e7fSPriya Krishnan * If the iscsi connection is active, then 140747715e7fSPriya Krishnan * logout the IDM connection by sending a 140847715e7fSPriya Krishnan * CE_LOGOUT_SESSION_SUCCESS, else, no action 140947715e7fSPriya Krishnan * needs to be taken because the connection 141047715e7fSPriya Krishnan * is already in the teardown process. 141147715e7fSPriya Krishnan */ 141247715e7fSPriya Krishnan mutex_enter(&ict->ict_mutex); 141347715e7fSPriya Krishnan if (ict->ict_lost == B_FALSE && ict->ict_destroyed == B_FALSE) { 141447715e7fSPriya Krishnan idm_conn_event(ict->ict_ic, CE_LOGOUT_SESSION_SUCCESS, NULL); 141547715e7fSPriya Krishnan } 141647715e7fSPriya Krishnan mutex_exit(&ict->ict_mutex); 141747715e7fSPriya Krishnan } 141847715e7fSPriya Krishnan 1419a6d42e7dSPeter Dunlap /* 1420a6d42e7dSPeter Dunlap * STMF-related functions 1421a6d42e7dSPeter Dunlap * 1422a6d42e7dSPeter Dunlap * iSCSI to STMF mapping 1423a6d42e7dSPeter Dunlap * 1424a6d42e7dSPeter Dunlap * Session == ? 1425a6d42e7dSPeter Dunlap * Connection == bound to local port but not itself a local port 1426a6d42e7dSPeter Dunlap * Target 1427a6d42e7dSPeter Dunlap * Target portal (group?) == local port (really but we're not going to do this) 1428a6d42e7dSPeter Dunlap * iscsit needs to map connections to local ports (whatever we decide 1429a6d42e7dSPeter Dunlap * they are) 1430a6d42e7dSPeter Dunlap * Target == ? 1431a6d42e7dSPeter Dunlap */ 1432a6d42e7dSPeter Dunlap 1433a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1434a6d42e7dSPeter Dunlap static stmf_data_buf_t * 1435a6d42e7dSPeter Dunlap iscsit_dbuf_alloc(scsi_task_t *task, uint32_t size, uint32_t *pminsize, 1436a6d42e7dSPeter Dunlap uint32_t flags) 1437a6d42e7dSPeter Dunlap { 1438a6d42e7dSPeter Dunlap iscsit_task_t *itask = task->task_port_private; 1439a6d42e7dSPeter Dunlap idm_buf_t *idm_buffer; 1440a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf; 1441a6d42e7dSPeter Dunlap stmf_data_buf_t *result; 144226ec4a22SPriya Krishnan uint32_t bsize; 1443a6d42e7dSPeter Dunlap 1444a6d42e7dSPeter Dunlap /* 144501c0a610SPriya Krishnan * If the requested size is larger than MaxBurstLength and the 144601c0a610SPriya Krishnan * given pminsize is also larger than MaxBurstLength, then the 144701c0a610SPriya Krishnan * allocation fails (dbuf = NULL) and pminsize is modified to 144801c0a610SPriya Krishnan * be equal to MaxBurstLength. stmf/sbd then should re-invoke 144901c0a610SPriya Krishnan * this function with the corrected values for transfer. 1450a6d42e7dSPeter Dunlap */ 145126ec4a22SPriya Krishnan ASSERT(pminsize); 145201c0a610SPriya Krishnan if (size <= itask->it_ict->ict_op.op_max_burst_length) { 145301c0a610SPriya Krishnan bsize = size; 145401c0a610SPriya Krishnan } else if (*pminsize <= itask->it_ict->ict_op.op_max_burst_length) { 145501c0a610SPriya Krishnan bsize = itask->it_ict->ict_op.op_max_burst_length; 145601c0a610SPriya Krishnan } else { 1457a6d42e7dSPeter Dunlap *pminsize = itask->it_ict->ict_op.op_max_burst_length; 1458a6d42e7dSPeter Dunlap return (NULL); 1459a6d42e7dSPeter Dunlap } 1460a6d42e7dSPeter Dunlap 1461a6d42e7dSPeter Dunlap /* Alloc buffer */ 146226ec4a22SPriya Krishnan idm_buffer = idm_buf_alloc(itask->it_ict->ict_ic, NULL, bsize); 1463a6d42e7dSPeter Dunlap if (idm_buffer != NULL) { 1464a6d42e7dSPeter Dunlap result = stmf_alloc(STMF_STRUCT_DATA_BUF, 1465a6d42e7dSPeter Dunlap sizeof (iscsit_buf_t), 0); 1466a6d42e7dSPeter Dunlap if (result != NULL) { 1467a6d42e7dSPeter Dunlap /* Fill in stmf_data_buf_t */ 1468a6d42e7dSPeter Dunlap ibuf = result->db_port_private; 1469a6d42e7dSPeter Dunlap ibuf->ibuf_idm_buf = idm_buffer; 1470a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf = result; 1471a6d42e7dSPeter Dunlap ibuf->ibuf_is_immed = B_FALSE; 1472a6d42e7dSPeter Dunlap result->db_flags = DB_DONT_CACHE; 147326ec4a22SPriya Krishnan result->db_buf_size = bsize; 147426ec4a22SPriya Krishnan result->db_data_size = bsize; 1475a6d42e7dSPeter Dunlap result->db_sglist_length = 1; 1476a6d42e7dSPeter Dunlap result->db_sglist[0].seg_addr = idm_buffer->idb_buf; 1477a6d42e7dSPeter Dunlap result->db_sglist[0].seg_length = 1478a6d42e7dSPeter Dunlap idm_buffer->idb_buflen; 1479a6d42e7dSPeter Dunlap return (result); 1480a6d42e7dSPeter Dunlap } 1481a6d42e7dSPeter Dunlap 1482a6d42e7dSPeter Dunlap /* Couldn't get the stmf_data_buf_t so free the buffer */ 1483a6d42e7dSPeter Dunlap idm_buf_free(idm_buffer); 1484a6d42e7dSPeter Dunlap } 1485a6d42e7dSPeter Dunlap 1486a6d42e7dSPeter Dunlap return (NULL); 1487a6d42e7dSPeter Dunlap } 1488a6d42e7dSPeter Dunlap 1489a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1490a6d42e7dSPeter Dunlap static void 1491a6d42e7dSPeter Dunlap iscsit_dbuf_free(stmf_dbuf_store_t *ds, stmf_data_buf_t *dbuf) 1492a6d42e7dSPeter Dunlap { 1493a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf = dbuf->db_port_private; 1494a6d42e7dSPeter Dunlap 1495a6d42e7dSPeter Dunlap if (ibuf->ibuf_is_immed) { 1496a6d42e7dSPeter Dunlap /* 1497a6d42e7dSPeter Dunlap * The iscsit_buf_t structure itself will be freed with its 1498a6d42e7dSPeter Dunlap * associated task. Here we just need to free the PDU that 1499a6d42e7dSPeter Dunlap * held the immediate data. 1500a6d42e7dSPeter Dunlap */ 1501a6d42e7dSPeter Dunlap idm_pdu_complete(ibuf->ibuf_immed_data_pdu, IDM_STATUS_SUCCESS); 1502a6d42e7dSPeter Dunlap ibuf->ibuf_immed_data_pdu = 0; 1503a6d42e7dSPeter Dunlap } else { 1504a6d42e7dSPeter Dunlap idm_buf_free(ibuf->ibuf_idm_buf); 1505a6d42e7dSPeter Dunlap stmf_free(dbuf); 1506a6d42e7dSPeter Dunlap } 1507a6d42e7dSPeter Dunlap } 1508a6d42e7dSPeter Dunlap 1509a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1510a6d42e7dSPeter Dunlap stmf_status_t 1511a6d42e7dSPeter Dunlap iscsit_xfer_scsi_data(scsi_task_t *task, stmf_data_buf_t *dbuf, 1512a6d42e7dSPeter Dunlap uint32_t ioflags) 1513a6d42e7dSPeter Dunlap { 1514a6d42e7dSPeter Dunlap iscsit_task_t *iscsit_task = task->task_port_private; 151560220f10SPriya Krishnan iscsit_sess_t *ict_sess = iscsit_task->it_ict->ict_sess; 1516a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf = dbuf->db_port_private; 1517a6d42e7dSPeter Dunlap int idm_rc; 1518a6d42e7dSPeter Dunlap 1519bf604c64SPeter Dunlap /* 1520bf604c64SPeter Dunlap * If we are aborting then we can ignore this request 1521bf604c64SPeter Dunlap */ 1522bf604c64SPeter Dunlap if (iscsit_task->it_stmf_abort) { 1523bf604c64SPeter Dunlap return (STMF_SUCCESS); 1524bf604c64SPeter Dunlap } 1525bf604c64SPeter Dunlap 1526a6d42e7dSPeter Dunlap /* 1527a6d42e7dSPeter Dunlap * If it's not immediate data then start the transfer 1528a6d42e7dSPeter Dunlap */ 1529a6d42e7dSPeter Dunlap ASSERT(ibuf->ibuf_is_immed == B_FALSE); 1530a6d42e7dSPeter Dunlap if (dbuf->db_flags & DB_DIRECTION_TO_RPORT) { 153160220f10SPriya Krishnan /* 153260220f10SPriya Krishnan * The DB_SEND_STATUS_GOOD flag in the STMF data buffer allows 153360220f10SPriya Krishnan * the port provider to phase-collapse, i.e. send the status 153460220f10SPriya Krishnan * along with the final data PDU for the command. The port 153560220f10SPriya Krishnan * provider passes this request to the transport layer by 153660220f10SPriya Krishnan * setting a flag IDM_TASK_PHASECOLLAPSE_REQ in the task. 153760220f10SPriya Krishnan */ 153860220f10SPriya Krishnan if (dbuf->db_flags & DB_SEND_STATUS_GOOD) 153960220f10SPriya Krishnan iscsit_task->it_idm_task->idt_flags |= 154060220f10SPriya Krishnan IDM_TASK_PHASECOLLAPSE_REQ; 1541a6d42e7dSPeter Dunlap /* 1542a6d42e7dSPeter Dunlap * IDM will call iscsit_build_hdr so lock now to serialize 1543a6d42e7dSPeter Dunlap * access to the SN values. We need to lock here to enforce 1544a6d42e7dSPeter Dunlap * lock ordering 1545a6d42e7dSPeter Dunlap */ 1546d618d68dSPriya Krishnan mutex_enter(&ict_sess->ist_sn_mutex); 1547a6d42e7dSPeter Dunlap idm_rc = idm_buf_tx_to_ini(iscsit_task->it_idm_task, 1548a6d42e7dSPeter Dunlap ibuf->ibuf_idm_buf, dbuf->db_relative_offset, 1549a6d42e7dSPeter Dunlap dbuf->db_data_size, &iscsit_buf_xfer_cb, dbuf); 1550d618d68dSPriya Krishnan mutex_exit(&ict_sess->ist_sn_mutex); 1551a6d42e7dSPeter Dunlap 1552a6d42e7dSPeter Dunlap return (iscsit_idm_to_stmf(idm_rc)); 1553a6d42e7dSPeter Dunlap } else if (dbuf->db_flags & DB_DIRECTION_FROM_RPORT) { 1554a6d42e7dSPeter Dunlap /* Grab the SN lock (see comment above) */ 1555d618d68dSPriya Krishnan mutex_enter(&ict_sess->ist_sn_mutex); 1556a6d42e7dSPeter Dunlap idm_rc = idm_buf_rx_from_ini(iscsit_task->it_idm_task, 1557a6d42e7dSPeter Dunlap ibuf->ibuf_idm_buf, dbuf->db_relative_offset, 1558a6d42e7dSPeter Dunlap dbuf->db_data_size, &iscsit_buf_xfer_cb, dbuf); 1559d618d68dSPriya Krishnan mutex_exit(&ict_sess->ist_sn_mutex); 1560a6d42e7dSPeter Dunlap 1561a6d42e7dSPeter Dunlap return (iscsit_idm_to_stmf(idm_rc)); 1562a6d42e7dSPeter Dunlap } 1563a6d42e7dSPeter Dunlap 1564a6d42e7dSPeter Dunlap /* What are we supposed to do if there is no direction? */ 1565a6d42e7dSPeter Dunlap return (STMF_INVALID_ARG); 1566a6d42e7dSPeter Dunlap } 1567a6d42e7dSPeter Dunlap 1568a6d42e7dSPeter Dunlap static void 1569a6d42e7dSPeter Dunlap iscsit_buf_xfer_cb(idm_buf_t *idb, idm_status_t status) 1570a6d42e7dSPeter Dunlap { 1571a6d42e7dSPeter Dunlap iscsit_task_t *itask = idb->idb_task_binding->idt_private; 1572a6d42e7dSPeter Dunlap stmf_data_buf_t *dbuf = idb->idb_cb_arg; 1573a6d42e7dSPeter Dunlap 1574a6d42e7dSPeter Dunlap dbuf->db_xfer_status = iscsit_idm_to_stmf(status); 1575a6d42e7dSPeter Dunlap 1576bf604c64SPeter Dunlap /* 1577bf604c64SPeter Dunlap * If the task has been aborted then we don't need to call STMF 1578bf604c64SPeter Dunlap */ 1579bf604c64SPeter Dunlap if (itask->it_stmf_abort) { 1580bf604c64SPeter Dunlap return; 1581bf604c64SPeter Dunlap } 1582bf604c64SPeter Dunlap 1583a6d42e7dSPeter Dunlap /* 158460220f10SPriya Krishnan * For ISCSI over TCP (not iSER), the last SCSI Data PDU passed 158560220f10SPriya Krishnan * for a successful command contains the status as requested by 158660220f10SPriya Krishnan * by COMSTAR (via the DB_SEND_STATUS_GOOD flag). But the iSER 158760220f10SPriya Krishnan * transport does not support phase-collapse. So pretend we are 158860220f10SPriya Krishnan * COMSTAR and send the status in a separate PDU now. 1589a6d42e7dSPeter Dunlap */ 159060220f10SPriya Krishnan if (idb->idb_task_binding->idt_flags & IDM_TASK_PHASECOLLAPSE_SUCCESS) { 159160220f10SPriya Krishnan /* 1592a2383ac5SPriya Krishnan * Mark task complete and notify COMSTAR 1593a2383ac5SPriya Krishnan * that the status has been sent. 159460220f10SPriya Krishnan */ 159560220f10SPriya Krishnan itask->it_idm_task->idt_state = TASK_COMPLETE; 159660220f10SPriya Krishnan stmf_send_status_done(itask->it_stmf_task, 159760220f10SPriya Krishnan iscsit_idm_to_stmf(status), STMF_IOF_LPORT_DONE); 159860220f10SPriya Krishnan } else if ((dbuf->db_flags & DB_SEND_STATUS_GOOD) && 1599a6d42e7dSPeter Dunlap status == IDM_STATUS_SUCCESS) { 160060220f10SPriya Krishnan 1601a6d42e7dSPeter Dunlap /* 160270a38f02SPriya Krishnan * The iscsi target port provider - for iSER, emulates the 160370a38f02SPriya Krishnan * DB_SEND_STATUS_GOOD optimization if requested by STMF; 160470a38f02SPriya Krishnan * it sends the status in a separate PDU after the data 160570a38f02SPriya Krishnan * transfer. In this case the port provider should first 160670a38f02SPriya Krishnan * call stmf_data_xfer_done() to mark the transfer complete 160770a38f02SPriya Krishnan * and then send the status. Although STMF will free the 160870a38f02SPriya Krishnan * buffer at the time the task is freed, even if the transfer 160970a38f02SPriya Krishnan * is not marked complete, this behavior makes statistics 161070a38f02SPriya Krishnan * gathering and task state tracking more difficult than it 161170a38f02SPriya Krishnan * needs to be. 1612a6d42e7dSPeter Dunlap */ 161370a38f02SPriya Krishnan stmf_data_xfer_done(itask->it_stmf_task, dbuf, 0); 1614a6d42e7dSPeter Dunlap if (iscsit_send_scsi_status(itask->it_stmf_task, 0) 161563528ae4SJames Moore != STMF_SUCCESS) { 161670a38f02SPriya Krishnan stmf_send_status_done(itask->it_stmf_task, 161770a38f02SPriya Krishnan STMF_FAILURE, STMF_IOF_LPORT_DONE); 1618a6d42e7dSPeter Dunlap } 1619a6d42e7dSPeter Dunlap } else { 1620a6d42e7dSPeter Dunlap stmf_data_xfer_done(itask->it_stmf_task, dbuf, 0); 162170a38f02SPriya Krishnan /* don't touch dbuf after stmf_data_xfer_done */ 1622a6d42e7dSPeter Dunlap } 1623a6d42e7dSPeter Dunlap } 1624a6d42e7dSPeter Dunlap 1625bf604c64SPeter Dunlap 1626a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1627a6d42e7dSPeter Dunlap stmf_status_t 1628a6d42e7dSPeter Dunlap iscsit_send_scsi_status(scsi_task_t *task, uint32_t ioflags) 1629a6d42e7dSPeter Dunlap { 1630a6d42e7dSPeter Dunlap iscsit_task_t *itask = task->task_port_private; 1631a6d42e7dSPeter Dunlap iscsi_scsi_rsp_hdr_t *rsp; 1632a6d42e7dSPeter Dunlap idm_pdu_t *pdu; 1633a6d42e7dSPeter Dunlap int resp_datalen; 1634a6d42e7dSPeter Dunlap 1635a6d42e7dSPeter Dunlap /* 1636a6d42e7dSPeter Dunlap * If this task is aborted then we don't need to respond. 1637a6d42e7dSPeter Dunlap */ 1638a6d42e7dSPeter Dunlap if (itask->it_stmf_abort) { 1639a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1640a6d42e7dSPeter Dunlap } 1641a6d42e7dSPeter Dunlap 1642a6d42e7dSPeter Dunlap /* 1643a6d42e7dSPeter Dunlap * If this is a task management status, handle it elsewhere. 1644a6d42e7dSPeter Dunlap */ 1645a6d42e7dSPeter Dunlap if (task->task_mgmt_function != TM_NONE) { 1646a6d42e7dSPeter Dunlap /* 1647a6d42e7dSPeter Dunlap * Don't wait for the PDU completion to tell STMF 1648a6d42e7dSPeter Dunlap * the task is done -- it doesn't really matter and 1649a6d42e7dSPeter Dunlap * it makes life complicated if STMF later asks us to 1650a6d42e7dSPeter Dunlap * abort the request and we don't know whether the 1651a6d42e7dSPeter Dunlap * status has been sent or not. 1652a6d42e7dSPeter Dunlap */ 1653a6d42e7dSPeter Dunlap itask->it_tm_responded = B_TRUE; 1654a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(itask->it_tm_pdu, 1655a6d42e7dSPeter Dunlap (task->task_completion_status == STMF_SUCCESS) ? 1656a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_COMPLETE : SCSI_TCP_TM_RESP_FUNC_NOT_SUPP); 1657a6d42e7dSPeter Dunlap stmf_send_status_done(task, STMF_SUCCESS, 1658a6d42e7dSPeter Dunlap STMF_IOF_LPORT_DONE); 1659a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1660a6d42e7dSPeter Dunlap } 1661a6d42e7dSPeter Dunlap 166272cf3143Speter dunlap /* 166372cf3143Speter dunlap * Remove the task from the session task list 166472cf3143Speter dunlap */ 166572cf3143Speter dunlap iscsit_task_done(itask); 166672cf3143Speter dunlap 166772cf3143Speter dunlap /* 166872cf3143Speter dunlap * Send status 166972cf3143Speter dunlap */ 1670a6d42e7dSPeter Dunlap mutex_enter(&itask->it_idm_task->idt_mutex); 1671a6d42e7dSPeter Dunlap if ((itask->it_idm_task->idt_state == TASK_ACTIVE) && 1672a6d42e7dSPeter Dunlap (task->task_completion_status == STMF_SUCCESS) && 1673a6d42e7dSPeter Dunlap (task->task_sense_length == 0) && 1674a6d42e7dSPeter Dunlap (task->task_resid == 0)) { 1675a6d42e7dSPeter Dunlap itask->it_idm_task->idt_state = TASK_COMPLETE; 1676a6d42e7dSPeter Dunlap /* PDU callback releases task hold */ 1677a6d42e7dSPeter Dunlap idm_task_hold(itask->it_idm_task); 1678a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 1679a6d42e7dSPeter Dunlap /* 1680a6d42e7dSPeter Dunlap * Fast path. Cached status PDU's are already 1681a6d42e7dSPeter Dunlap * initialized. We just need to fill in 168260220f10SPriya Krishnan * connection and task information. StatSN is 168360220f10SPriya Krishnan * incremented by 1 for every status sent a 168460220f10SPriya Krishnan * connection. 1685a6d42e7dSPeter Dunlap */ 1686a6d42e7dSPeter Dunlap pdu = kmem_cache_alloc(iscsit_status_pdu_cache, KM_SLEEP); 1687a6d42e7dSPeter Dunlap pdu->isp_ic = itask->it_ict->ict_ic; 1688a6d42e7dSPeter Dunlap pdu->isp_private = itask; 168960220f10SPriya Krishnan pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 1690a6d42e7dSPeter Dunlap 1691a6d42e7dSPeter Dunlap rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 1692a6d42e7dSPeter Dunlap rsp->itt = itask->it_itt; 16931d7b78a3SPriya Krishnan /* 16941d7b78a3SPriya Krishnan * ExpDataSN is the number of R2T and Data-In (read) 16951d7b78a3SPriya Krishnan * PDUs the target has sent for the SCSI command. 16961d7b78a3SPriya Krishnan * 16971d7b78a3SPriya Krishnan * Since there is no support for bidirectional transfer 16981d7b78a3SPriya Krishnan * yet, either idt_exp_datasn or idt_exp_rttsn, but not 16991d7b78a3SPriya Krishnan * both is valid at any time 17001d7b78a3SPriya Krishnan */ 17011d7b78a3SPriya Krishnan rsp->expdatasn = (itask->it_idm_task->idt_exp_datasn != 0) ? 17021d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_datasn): 17031d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_rttsn); 1704a6d42e7dSPeter Dunlap rsp->cmd_status = task->task_scsi_status; 1705a6d42e7dSPeter Dunlap iscsit_pdu_tx(pdu); 1706a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1707a6d42e7dSPeter Dunlap } else { 1708a6d42e7dSPeter Dunlap if (itask->it_idm_task->idt_state != TASK_ACTIVE) { 1709a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 171063528ae4SJames Moore return (STMF_FAILURE); 1711a6d42e7dSPeter Dunlap } 1712a6d42e7dSPeter Dunlap itask->it_idm_task->idt_state = TASK_COMPLETE; 1713a6d42e7dSPeter Dunlap /* PDU callback releases task hold */ 1714a6d42e7dSPeter Dunlap idm_task_hold(itask->it_idm_task); 1715a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 1716a6d42e7dSPeter Dunlap 1717a6d42e7dSPeter Dunlap resp_datalen = (task->task_sense_length == 0) ? 0 : 1718a6d42e7dSPeter Dunlap (task->task_sense_length + sizeof (uint16_t)); 1719a6d42e7dSPeter Dunlap 1720a6d42e7dSPeter Dunlap pdu = idm_pdu_alloc(sizeof (iscsi_hdr_t), resp_datalen); 1721a6d42e7dSPeter Dunlap idm_pdu_init(pdu, itask->it_ict->ict_ic, itask, 1722a6d42e7dSPeter Dunlap iscsit_send_status_done); 172360220f10SPriya Krishnan pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 1724a6d42e7dSPeter Dunlap 1725a6d42e7dSPeter Dunlap rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 1726a6d42e7dSPeter Dunlap bzero(rsp, sizeof (*rsp)); 1727a6d42e7dSPeter Dunlap rsp->opcode = ISCSI_OP_SCSI_RSP; 1728a6d42e7dSPeter Dunlap 1729a6d42e7dSPeter Dunlap rsp->flags = ISCSI_FLAG_FINAL; 1730a6d42e7dSPeter Dunlap if (task->task_status_ctrl & TASK_SCTRL_OVER) { 1731a6d42e7dSPeter Dunlap rsp->flags |= ISCSI_FLAG_CMD_OVERFLOW; 1732a6d42e7dSPeter Dunlap } else if (task->task_status_ctrl & TASK_SCTRL_UNDER) { 1733a6d42e7dSPeter Dunlap rsp->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 1734a6d42e7dSPeter Dunlap } 1735a6d42e7dSPeter Dunlap 1736a6d42e7dSPeter Dunlap rsp->bi_residual_count = 0; 1737a6d42e7dSPeter Dunlap rsp->residual_count = htonl(task->task_resid); 1738a6d42e7dSPeter Dunlap rsp->itt = itask->it_itt; 1739a6d42e7dSPeter Dunlap rsp->response = ISCSI_STATUS_CMD_COMPLETED; 17401d7b78a3SPriya Krishnan rsp->expdatasn = (itask->it_idm_task->idt_exp_datasn != 0) ? 17411d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_datasn): 17421d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_rttsn); 1743a6d42e7dSPeter Dunlap rsp->cmd_status = task->task_scsi_status; 1744a6d42e7dSPeter Dunlap if (task->task_sense_length != 0) { 1745a6d42e7dSPeter Dunlap /* 1746a6d42e7dSPeter Dunlap * Add a byte to provide the sense length in 1747a6d42e7dSPeter Dunlap * the response 1748a6d42e7dSPeter Dunlap */ 1749a6d42e7dSPeter Dunlap *(uint16_t *)((void *)pdu->isp_data) = 1750a6d42e7dSPeter Dunlap htons(task->task_sense_length); 1751a6d42e7dSPeter Dunlap bcopy(task->task_sense_data, 1752a6d42e7dSPeter Dunlap (uint8_t *)pdu->isp_data + 1753a6d42e7dSPeter Dunlap sizeof (uint16_t), 1754a6d42e7dSPeter Dunlap task->task_sense_length); 1755a6d42e7dSPeter Dunlap hton24(rsp->dlength, resp_datalen); 1756a6d42e7dSPeter Dunlap } 1757a6d42e7dSPeter Dunlap 175830e7468fSPeter Dunlap DTRACE_PROBE5(iscsi__scsi__response, 175930e7468fSPeter Dunlap iscsit_conn_t *, itask->it_ict, 176030e7468fSPeter Dunlap uint8_t, rsp->response, 176130e7468fSPeter Dunlap uint8_t, rsp->cmd_status, 176230e7468fSPeter Dunlap idm_pdu_t *, pdu, 176330e7468fSPeter Dunlap scsi_task_t *, task); 176430e7468fSPeter Dunlap 1765a6d42e7dSPeter Dunlap iscsit_pdu_tx(pdu); 1766a6d42e7dSPeter Dunlap 1767a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1768a6d42e7dSPeter Dunlap } 1769a6d42e7dSPeter Dunlap } 1770a6d42e7dSPeter Dunlap 1771a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1772a6d42e7dSPeter Dunlap static void 1773a6d42e7dSPeter Dunlap iscsit_send_good_status_done(idm_pdu_t *pdu, idm_status_t status) 1774a6d42e7dSPeter Dunlap { 1775bf604c64SPeter Dunlap iscsit_task_t *itask; 1776bf604c64SPeter Dunlap boolean_t aborted; 1777a6d42e7dSPeter Dunlap 1778a6d42e7dSPeter Dunlap itask = pdu->isp_private; 1779bf604c64SPeter Dunlap aborted = itask->it_stmf_abort; 1780bf604c64SPeter Dunlap 1781bf604c64SPeter Dunlap /* 1782bf604c64SPeter Dunlap * After releasing the hold the task may be freed at any time so 1783bf604c64SPeter Dunlap * don't touch it. 1784bf604c64SPeter Dunlap */ 1785a6d42e7dSPeter Dunlap idm_task_rele(itask->it_idm_task); 1786bf604c64SPeter Dunlap if (!aborted) { 1787bf604c64SPeter Dunlap stmf_send_status_done(itask->it_stmf_task, 1788bf604c64SPeter Dunlap iscsit_idm_to_stmf(pdu->isp_status), STMF_IOF_LPORT_DONE); 1789bf604c64SPeter Dunlap } 1790a6d42e7dSPeter Dunlap kmem_cache_free(iscsit_status_pdu_cache, pdu); 1791a6d42e7dSPeter Dunlap } 1792a6d42e7dSPeter Dunlap 1793a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1794a6d42e7dSPeter Dunlap static void 1795a6d42e7dSPeter Dunlap iscsit_send_status_done(idm_pdu_t *pdu, idm_status_t status) 1796a6d42e7dSPeter Dunlap { 1797a6d42e7dSPeter Dunlap iscsit_task_t *itask; 1798bf604c64SPeter Dunlap boolean_t aborted; 1799a6d42e7dSPeter Dunlap 1800a6d42e7dSPeter Dunlap itask = pdu->isp_private; 1801bf604c64SPeter Dunlap aborted = itask->it_stmf_abort; 1802bf604c64SPeter Dunlap 1803bf604c64SPeter Dunlap /* 1804bf604c64SPeter Dunlap * After releasing the hold the task may be freed at any time so 1805bf604c64SPeter Dunlap * don't touch it. 1806bf604c64SPeter Dunlap */ 1807a6d42e7dSPeter Dunlap idm_task_rele(itask->it_idm_task); 1808bf604c64SPeter Dunlap if (!aborted) { 1809bf604c64SPeter Dunlap stmf_send_status_done(itask->it_stmf_task, 1810bf604c64SPeter Dunlap iscsit_idm_to_stmf(pdu->isp_status), STMF_IOF_LPORT_DONE); 1811bf604c64SPeter Dunlap } 1812a6d42e7dSPeter Dunlap idm_pdu_free(pdu); 1813a6d42e7dSPeter Dunlap } 1814a6d42e7dSPeter Dunlap 1815a6d42e7dSPeter Dunlap 1816a6d42e7dSPeter Dunlap void 1817a6d42e7dSPeter Dunlap iscsit_lport_task_free(scsi_task_t *task) 1818a6d42e7dSPeter Dunlap { 1819a6d42e7dSPeter Dunlap iscsit_task_t *itask = task->task_port_private; 1820a6d42e7dSPeter Dunlap 1821a6d42e7dSPeter Dunlap /* We only call idm_task_start for regular tasks, not task management */ 1822a6d42e7dSPeter Dunlap if (task->task_mgmt_function == TM_NONE) { 1823a6d42e7dSPeter Dunlap idm_task_done(itask->it_idm_task); 1824a6d42e7dSPeter Dunlap iscsit_task_free(itask); 1825a6d42e7dSPeter Dunlap return; 1826a6d42e7dSPeter Dunlap } else { 1827a6d42e7dSPeter Dunlap iscsit_tm_task_free(itask); 1828a6d42e7dSPeter Dunlap } 1829a6d42e7dSPeter Dunlap } 1830a6d42e7dSPeter Dunlap 1831a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1832a6d42e7dSPeter Dunlap stmf_status_t 1833a6d42e7dSPeter Dunlap iscsit_abort(stmf_local_port_t *lport, int abort_cmd, void *arg, uint32_t flags) 1834a6d42e7dSPeter Dunlap { 1835a6d42e7dSPeter Dunlap scsi_task_t *st = (scsi_task_t *)arg; 1836a6d42e7dSPeter Dunlap iscsit_task_t *iscsit_task; 1837a6d42e7dSPeter Dunlap idm_task_t *idt; 1838a6d42e7dSPeter Dunlap 1839a6d42e7dSPeter Dunlap /* 1840a6d42e7dSPeter Dunlap * If this is a task management request then there's really not much to 1841a6d42e7dSPeter Dunlap * do. 1842a6d42e7dSPeter Dunlap */ 1843a6d42e7dSPeter Dunlap if (st->task_mgmt_function != TM_NONE) { 1844a6d42e7dSPeter Dunlap return (STMF_ABORT_SUCCESS); 1845a6d42e7dSPeter Dunlap } 1846a6d42e7dSPeter Dunlap 1847a6d42e7dSPeter Dunlap /* 1848a6d42e7dSPeter Dunlap * Regular task, start cleaning up 1849a6d42e7dSPeter Dunlap */ 1850a6d42e7dSPeter Dunlap iscsit_task = st->task_port_private; 1851a6d42e7dSPeter Dunlap idt = iscsit_task->it_idm_task; 1852a6d42e7dSPeter Dunlap mutex_enter(&iscsit_task->it_mutex); 1853a6d42e7dSPeter Dunlap iscsit_task->it_stmf_abort = B_TRUE; 1854a6d42e7dSPeter Dunlap if (iscsit_task->it_aborted) { 1855a6d42e7dSPeter Dunlap mutex_exit(&iscsit_task->it_mutex); 185672cf3143Speter dunlap /* 185772cf3143Speter dunlap * Task is no longer active 185872cf3143Speter dunlap */ 185972cf3143Speter dunlap iscsit_task_done(iscsit_task); 186072cf3143Speter dunlap 1861a6d42e7dSPeter Dunlap /* 1862a6d42e7dSPeter Dunlap * STMF specification is wrong... says to return 1863a6d42e7dSPeter Dunlap * STMF_ABORTED, the code actually looks for 1864a6d42e7dSPeter Dunlap * STMF_ABORT_SUCCESS. 1865a6d42e7dSPeter Dunlap */ 1866a6d42e7dSPeter Dunlap return (STMF_ABORT_SUCCESS); 1867a6d42e7dSPeter Dunlap } else { 1868a6d42e7dSPeter Dunlap mutex_exit(&iscsit_task->it_mutex); 1869a6d42e7dSPeter Dunlap /* 1870a6d42e7dSPeter Dunlap * Call IDM to abort the task. Due to a variety of 1871a6d42e7dSPeter Dunlap * circumstances the task may already be in the process of 1872a6d42e7dSPeter Dunlap * aborting. 1873a6d42e7dSPeter Dunlap * We'll let IDM worry about rationalizing all that except 1874a6d42e7dSPeter Dunlap * for one particular instance. If the state of the task 1875a6d42e7dSPeter Dunlap * is TASK_COMPLETE, we need to indicate to the framework 1876a6d42e7dSPeter Dunlap * that we are in fact done. This typically happens with 1877a6d42e7dSPeter Dunlap * framework-initiated task management type requests 1878a6d42e7dSPeter Dunlap * (e.g. abort task). 1879a6d42e7dSPeter Dunlap */ 1880a6d42e7dSPeter Dunlap if (idt->idt_state == TASK_COMPLETE) { 1881a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&idt->idt_refcnt); 1882a6d42e7dSPeter Dunlap return (STMF_ABORT_SUCCESS); 1883a6d42e7dSPeter Dunlap } else { 1884a6d42e7dSPeter Dunlap idm_task_abort(idt->idt_ic, idt, AT_TASK_MGMT_ABORT); 1885a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1886a6d42e7dSPeter Dunlap } 1887a6d42e7dSPeter Dunlap } 1888a6d42e7dSPeter Dunlap 1889a6d42e7dSPeter Dunlap /*NOTREACHED*/ 1890a6d42e7dSPeter Dunlap } 1891a6d42e7dSPeter Dunlap 1892a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1893a6d42e7dSPeter Dunlap void 1894a6d42e7dSPeter Dunlap iscsit_ctl(stmf_local_port_t *lport, int cmd, void *arg) 1895a6d42e7dSPeter Dunlap { 1896a6d42e7dSPeter Dunlap iscsit_tgt_t *iscsit_tgt; 1897a6d42e7dSPeter Dunlap 1898a6d42e7dSPeter Dunlap ASSERT((cmd == STMF_CMD_LPORT_ONLINE) || 1899a6d42e7dSPeter Dunlap (cmd == STMF_ACK_LPORT_ONLINE_COMPLETE) || 1900a6d42e7dSPeter Dunlap (cmd == STMF_CMD_LPORT_OFFLINE) || 1901a6d42e7dSPeter Dunlap (cmd == STMF_ACK_LPORT_OFFLINE_COMPLETE)); 1902a6d42e7dSPeter Dunlap 1903a6d42e7dSPeter Dunlap iscsit_tgt = (iscsit_tgt_t *)lport->lport_port_private; 1904a6d42e7dSPeter Dunlap 1905a6d42e7dSPeter Dunlap switch (cmd) { 1906a6d42e7dSPeter Dunlap case STMF_CMD_LPORT_ONLINE: 1907a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_ONLINE_REQ); 1908a6d42e7dSPeter Dunlap break; 1909a6d42e7dSPeter Dunlap case STMF_CMD_LPORT_OFFLINE: 1910a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_OFFLINE_REQ); 1911a6d42e7dSPeter Dunlap break; 1912a6d42e7dSPeter Dunlap case STMF_ACK_LPORT_ONLINE_COMPLETE: 1913a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_ONLINE_COMPLETE_ACK); 1914a6d42e7dSPeter Dunlap break; 1915a6d42e7dSPeter Dunlap case STMF_ACK_LPORT_OFFLINE_COMPLETE: 1916a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_OFFLINE_COMPLETE_ACK); 1917a6d42e7dSPeter Dunlap break; 1918a6d42e7dSPeter Dunlap 1919a6d42e7dSPeter Dunlap default: 1920a6d42e7dSPeter Dunlap break; 1921a6d42e7dSPeter Dunlap } 1922a6d42e7dSPeter Dunlap } 1923a6d42e7dSPeter Dunlap 1924a6d42e7dSPeter Dunlap static stmf_status_t 1925a6d42e7dSPeter Dunlap iscsit_idm_to_stmf(idm_status_t idmrc) 1926a6d42e7dSPeter Dunlap { 1927a6d42e7dSPeter Dunlap switch (idmrc) { 1928a6d42e7dSPeter Dunlap case IDM_STATUS_SUCCESS: 1929a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1930a6d42e7dSPeter Dunlap default: 1931a6d42e7dSPeter Dunlap return (STMF_FAILURE); 1932a6d42e7dSPeter Dunlap } 1933a6d42e7dSPeter Dunlap /*NOTREACHED*/ 1934a6d42e7dSPeter Dunlap } 1935a6d42e7dSPeter Dunlap 1936d618d68dSPriya Krishnan void 1937d618d68dSPriya Krishnan iscsit_op_scsi_cmd(idm_conn_t *ic, idm_pdu_t *rx_pdu) 1938d618d68dSPriya Krishnan { 1939d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 1940d618d68dSPriya Krishnan 1941d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 1942d618d68dSPriya Krishnan iscsit_post_scsi_cmd(ic, rx_pdu); 1943d618d68dSPriya Krishnan } 1944d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(ict->ict_sess); 1945d618d68dSPriya Krishnan } 1946a6d42e7dSPeter Dunlap 1947a6d42e7dSPeter Dunlap /* 1948a6d42e7dSPeter Dunlap * ISCSI protocol 1949a6d42e7dSPeter Dunlap */ 1950a6d42e7dSPeter Dunlap 1951a6d42e7dSPeter Dunlap void 1952d618d68dSPriya Krishnan iscsit_post_scsi_cmd(idm_conn_t *ic, idm_pdu_t *rx_pdu) 1953a6d42e7dSPeter Dunlap { 1954a6d42e7dSPeter Dunlap iscsit_conn_t *ict; 1955a6d42e7dSPeter Dunlap iscsit_task_t *itask; 1956a6d42e7dSPeter Dunlap scsi_task_t *task; 1957a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf; 1958a6d42e7dSPeter Dunlap iscsi_scsi_cmd_hdr_t *iscsi_scsi = 1959a6d42e7dSPeter Dunlap (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 1960a6d42e7dSPeter Dunlap iscsi_addl_hdr_t *ahs_hdr; 1961a6d42e7dSPeter Dunlap uint16_t addl_cdb_len = 0; 1962a6d42e7dSPeter Dunlap 1963a6d42e7dSPeter Dunlap ict = ic->ic_handle; 1964a6d42e7dSPeter Dunlap 1965a6d42e7dSPeter Dunlap itask = iscsit_task_alloc(ict); 1966a6d42e7dSPeter Dunlap if (itask == NULL) { 196772cf3143Speter dunlap /* Finish processing request */ 196872cf3143Speter dunlap iscsit_set_cmdsn(ict, rx_pdu); 196972cf3143Speter dunlap 1970a6d42e7dSPeter Dunlap iscsit_send_direct_scsi_resp(ict, rx_pdu, 1971a6d42e7dSPeter Dunlap ISCSI_STATUS_CMD_COMPLETED, STATUS_BUSY); 1972a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 1973a6d42e7dSPeter Dunlap return; 1974a6d42e7dSPeter Dunlap } 1975a6d42e7dSPeter Dunlap 1976a6d42e7dSPeter Dunlap /* 1977a6d42e7dSPeter Dunlap * Note CmdSN and ITT in task. IDM will have already validated this 1978a6d42e7dSPeter Dunlap * request against the connection state so we don't need to check 1979a6d42e7dSPeter Dunlap * that (the connection may have changed state in the meantime but 1980a6d42e7dSPeter Dunlap * we will catch that when we try to send a response) 1981a6d42e7dSPeter Dunlap */ 1982a6d42e7dSPeter Dunlap itask->it_cmdsn = ntohl(iscsi_scsi->cmdsn); 1983a6d42e7dSPeter Dunlap itask->it_itt = iscsi_scsi->itt; 1984a6d42e7dSPeter Dunlap 1985a6d42e7dSPeter Dunlap /* 1986a6d42e7dSPeter Dunlap * Check for extended CDB AHS 1987a6d42e7dSPeter Dunlap */ 1988a6d42e7dSPeter Dunlap if (iscsi_scsi->hlength > 0) { 1989a6d42e7dSPeter Dunlap ahs_hdr = (iscsi_addl_hdr_t *)iscsi_scsi; 1990a6d42e7dSPeter Dunlap addl_cdb_len = ((ahs_hdr->ahs_hlen_hi << 8) | 1991a6d42e7dSPeter Dunlap ahs_hdr->ahs_hlen_lo) - 1; /* Adjust for reserved byte */ 1992a6d42e7dSPeter Dunlap if (((addl_cdb_len + 4) / sizeof (uint32_t)) > 1993a6d42e7dSPeter Dunlap iscsi_scsi->hlength) { 1994a6d42e7dSPeter Dunlap /* Mangled header info, drop it */ 1995a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 1996a6d42e7dSPeter Dunlap return; 1997a6d42e7dSPeter Dunlap } 1998a6d42e7dSPeter Dunlap } 1999a6d42e7dSPeter Dunlap 2000a6d42e7dSPeter Dunlap ict = rx_pdu->isp_ic->ic_handle; /* IDM client private */ 2001a6d42e7dSPeter Dunlap 200272cf3143Speter dunlap /* 200372cf3143Speter dunlap * Add task to session list. This function will also check to 200472cf3143Speter dunlap * ensure that the task does not already exist. 200572cf3143Speter dunlap */ 200672cf3143Speter dunlap if (iscsit_task_start(itask) != IDM_STATUS_SUCCESS) { 200772cf3143Speter dunlap /* 200872cf3143Speter dunlap * Task exists, free all resources and reject. Don't 200972cf3143Speter dunlap * update expcmdsn in this case because RFC 3720 says 201072cf3143Speter dunlap * "The CmdSN of the rejected command PDU (if it is a 201172cf3143Speter dunlap * non-immediate command) MUST NOT be considered received 201272cf3143Speter dunlap * by the target (i.e., a command sequence gap must be 201372cf3143Speter dunlap * assumed for the CmdSN), even though the CmdSN of the 201472cf3143Speter dunlap * rejected command PDU may be reliably ascertained. Upon 201572cf3143Speter dunlap * receiving the Reject, the initiator MUST plug the CmdSN 201672cf3143Speter dunlap * gap in order to continue to use the session. The gap 201772cf3143Speter dunlap * may be plugged either by transmitting a command PDU 201872cf3143Speter dunlap * with the same CmdSN, or by aborting the task (see section 201972cf3143Speter dunlap * 6.9 on how an abort may plug a CmdSN gap)." (Section 6.3) 202072cf3143Speter dunlap */ 202172cf3143Speter dunlap iscsit_task_free(itask); 202272cf3143Speter dunlap iscsit_send_reject(ict, rx_pdu, ISCSI_REJECT_TASK_IN_PROGRESS); 202372cf3143Speter dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 202472cf3143Speter dunlap return; 202572cf3143Speter dunlap } 202672cf3143Speter dunlap 202772cf3143Speter dunlap /* Update sequence numbers */ 202872cf3143Speter dunlap iscsit_set_cmdsn(ict, rx_pdu); 202972cf3143Speter dunlap 203072cf3143Speter dunlap /* 203172cf3143Speter dunlap * Allocate STMF task 203272cf3143Speter dunlap */ 2033a6d42e7dSPeter Dunlap itask->it_stmf_task = stmf_task_alloc( 2034a6d42e7dSPeter Dunlap itask->it_ict->ict_sess->ist_lport, 2035a6d42e7dSPeter Dunlap itask->it_ict->ict_sess->ist_stmf_sess, iscsi_scsi->lun, 2036a6d42e7dSPeter Dunlap 16 + addl_cdb_len, 0); 2037a6d42e7dSPeter Dunlap if (itask->it_stmf_task == NULL) { 2038a6d42e7dSPeter Dunlap /* 2039a6d42e7dSPeter Dunlap * Either stmf really couldn't get memory for a task or, 2040a6d42e7dSPeter Dunlap * more likely, the LU is currently in reset. Either way 2041a6d42e7dSPeter Dunlap * we have no choice but to fail the request. 2042a6d42e7dSPeter Dunlap */ 204372cf3143Speter dunlap iscsit_task_done(itask); 2044a6d42e7dSPeter Dunlap iscsit_task_free(itask); 2045a6d42e7dSPeter Dunlap iscsit_send_direct_scsi_resp(ict, rx_pdu, 2046a6d42e7dSPeter Dunlap ISCSI_STATUS_CMD_COMPLETED, STATUS_BUSY); 204772cf3143Speter dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2048a6d42e7dSPeter Dunlap return; 2049a6d42e7dSPeter Dunlap } 2050a6d42e7dSPeter Dunlap 2051a6d42e7dSPeter Dunlap task = itask->it_stmf_task; 2052a6d42e7dSPeter Dunlap task->task_port_private = itask; 2053a6d42e7dSPeter Dunlap 2054a6d42e7dSPeter Dunlap bcopy(iscsi_scsi->lun, task->task_lun_no, sizeof (task->task_lun_no)); 2055a6d42e7dSPeter Dunlap 2056a6d42e7dSPeter Dunlap /* 2057a6d42e7dSPeter Dunlap * iSCSI and Comstar use the same values. Should we rely on this 2058a6d42e7dSPeter Dunlap * or translate them bit-wise? 2059a6d42e7dSPeter Dunlap */ 2060a6d42e7dSPeter Dunlap 2061a6d42e7dSPeter Dunlap task->task_flags = 2062a6d42e7dSPeter Dunlap (((iscsi_scsi->flags & ISCSI_FLAG_CMD_READ) ? TF_READ_DATA : 0) | 2063a6d42e7dSPeter Dunlap ((iscsi_scsi->flags & ISCSI_FLAG_CMD_WRITE) ? TF_WRITE_DATA : 0) | 2064a6d42e7dSPeter Dunlap ((rx_pdu->isp_datalen == 0) ? 0 : TF_INITIAL_BURST)); 2065a6d42e7dSPeter Dunlap 2066a6d42e7dSPeter Dunlap switch (iscsi_scsi->flags & ISCSI_FLAG_CMD_ATTR_MASK) { 2067a6d42e7dSPeter Dunlap case ISCSI_ATTR_UNTAGGED: 2068a6d42e7dSPeter Dunlap break; 2069a6d42e7dSPeter Dunlap case ISCSI_ATTR_SIMPLE: 2070a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_SIMPLE_QUEUE; 2071a6d42e7dSPeter Dunlap break; 2072a6d42e7dSPeter Dunlap case ISCSI_ATTR_ORDERED: 2073a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_ORDERED_QUEUE; 2074a6d42e7dSPeter Dunlap break; 2075a6d42e7dSPeter Dunlap case ISCSI_ATTR_HEAD_OF_QUEUE: 2076a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_HEAD_OF_QUEUE; 2077a6d42e7dSPeter Dunlap break; 2078a6d42e7dSPeter Dunlap case ISCSI_ATTR_ACA: 2079a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_ACA; 2080a6d42e7dSPeter Dunlap break; 2081a6d42e7dSPeter Dunlap default: 2082a6d42e7dSPeter Dunlap /* Protocol error but just take it, treat as untagged */ 2083a6d42e7dSPeter Dunlap break; 2084a6d42e7dSPeter Dunlap } 2085a6d42e7dSPeter Dunlap 2086a6d42e7dSPeter Dunlap 2087a6d42e7dSPeter Dunlap task->task_additional_flags = 0; 2088a6d42e7dSPeter Dunlap task->task_priority = 0; 2089a6d42e7dSPeter Dunlap task->task_mgmt_function = TM_NONE; 2090a6d42e7dSPeter Dunlap 2091a6d42e7dSPeter Dunlap /* 2092a6d42e7dSPeter Dunlap * This "task_max_nbufs" doesn't map well to BIDI. We probably need 2093a6d42e7dSPeter Dunlap * parameter for each direction. "MaxOutstandingR2T" may very well 2094a6d42e7dSPeter Dunlap * be set to one which could prevent us from doing simultaneous 2095a6d42e7dSPeter Dunlap * transfers in each direction. 2096a6d42e7dSPeter Dunlap */ 2097a6d42e7dSPeter Dunlap task->task_max_nbufs = (iscsi_scsi->flags & ISCSI_FLAG_CMD_WRITE) ? 2098a6d42e7dSPeter Dunlap ict->ict_op.op_max_outstanding_r2t : STMF_BUFS_MAX; 2099a6d42e7dSPeter Dunlap task->task_cmd_seq_no = ntohl(iscsi_scsi->itt); 2100a6d42e7dSPeter Dunlap task->task_expected_xfer_length = ntohl(iscsi_scsi->data_length); 2101a6d42e7dSPeter Dunlap 2102a6d42e7dSPeter Dunlap /* Copy CDB */ 2103a6d42e7dSPeter Dunlap bcopy(iscsi_scsi->scb, task->task_cdb, 16); 2104a6d42e7dSPeter Dunlap if (addl_cdb_len > 0) { 2105a6d42e7dSPeter Dunlap bcopy(ahs_hdr->ahs_extscb, task->task_cdb + 16, addl_cdb_len); 2106a6d42e7dSPeter Dunlap } 2107a6d42e7dSPeter Dunlap 2108a668b114SPriya Krishnan DTRACE_ISCSI_3(scsi__command, idm_conn_t *, ic, 2109a668b114SPriya Krishnan iscsi_scsi_cmd_hdr_t *, (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr, 2110a668b114SPriya Krishnan scsi_task_t *, task); 2111a668b114SPriya Krishnan 2112a6d42e7dSPeter Dunlap /* 2113a6d42e7dSPeter Dunlap * Copy the transport header into the task handle from the PDU 2114a6d42e7dSPeter Dunlap * handle. The transport header describes this task's remote tagged 2115a6d42e7dSPeter Dunlap * buffer. 2116a6d42e7dSPeter Dunlap */ 2117a6d42e7dSPeter Dunlap if (rx_pdu->isp_transport_hdrlen != 0) { 2118a6d42e7dSPeter Dunlap bcopy(rx_pdu->isp_transport_hdr, 2119a6d42e7dSPeter Dunlap itask->it_idm_task->idt_transport_hdr, 2120a6d42e7dSPeter Dunlap rx_pdu->isp_transport_hdrlen); 2121a6d42e7dSPeter Dunlap } 2122a6d42e7dSPeter Dunlap 2123a6d42e7dSPeter Dunlap /* 2124a6d42e7dSPeter Dunlap * Tell IDM about our new active task 2125a6d42e7dSPeter Dunlap */ 2126a6d42e7dSPeter Dunlap idm_task_start(itask->it_idm_task, (uintptr_t)itask->it_itt); 2127a6d42e7dSPeter Dunlap 2128a6d42e7dSPeter Dunlap /* 2129a6d42e7dSPeter Dunlap * If we have any immediate data then setup the immediate buffer 2130a6d42e7dSPeter Dunlap * context that comes with the task 2131a6d42e7dSPeter Dunlap */ 2132a6d42e7dSPeter Dunlap if (rx_pdu->isp_datalen) { 2133a6d42e7dSPeter Dunlap ibuf = itask->it_immed_data; 2134a6d42e7dSPeter Dunlap ibuf->ibuf_immed_data_pdu = rx_pdu; 2135a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_data_size = rx_pdu->isp_datalen; 2136a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_buf_size = rx_pdu->isp_datalen; 2137a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_relative_offset = 0; 2138a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_sglist[0].seg_length = 2139a6d42e7dSPeter Dunlap rx_pdu->isp_datalen; 2140a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_sglist[0].seg_addr = rx_pdu->isp_data; 2141a6d42e7dSPeter Dunlap 2142a668b114SPriya Krishnan DTRACE_ISCSI_8(xfer__start, idm_conn_t *, ic, 2143a668b114SPriya Krishnan uintptr_t, ibuf->ibuf_stmf_buf->db_sglist[0].seg_addr, 2144a668b114SPriya Krishnan uint32_t, ibuf->ibuf_stmf_buf->db_relative_offset, 2145a668b114SPriya Krishnan uint64_t, 0, uint32_t, 0, uint32_t, 0, /* no raddr */ 2146a668b114SPriya Krishnan uint32_t, rx_pdu->isp_datalen, int, XFER_BUF_TX_TO_INI); 2147a668b114SPriya Krishnan 21483badd853SPriya Krishnan /* 21493badd853SPriya Krishnan * For immediate data transfer, there is no callback from 21503badd853SPriya Krishnan * stmf to indicate that the initial burst of data is 21513badd853SPriya Krishnan * transferred successfully. In some cases, the task can 21523badd853SPriya Krishnan * get freed before execution returns from stmf_post_task. 21533badd853SPriya Krishnan * Although this xfer-start/done probe accurately tracks 21543badd853SPriya Krishnan * the size of the transfer, it does only provide a best 21553badd853SPriya Krishnan * effort on the timing of the transfer. 21563badd853SPriya Krishnan */ 2157a668b114SPriya Krishnan DTRACE_ISCSI_8(xfer__done, idm_conn_t *, ic, 2158a668b114SPriya Krishnan uintptr_t, ibuf->ibuf_stmf_buf->db_sglist[0].seg_addr, 2159a668b114SPriya Krishnan uint32_t, ibuf->ibuf_stmf_buf->db_relative_offset, 2160a668b114SPriya Krishnan uint64_t, 0, uint32_t, 0, uint32_t, 0, /* no raddr */ 2161a668b114SPriya Krishnan uint32_t, rx_pdu->isp_datalen, int, XFER_BUF_TX_TO_INI); 21623badd853SPriya Krishnan stmf_post_task(task, ibuf->ibuf_stmf_buf); 2163a6d42e7dSPeter Dunlap } else { 21643badd853SPriya Krishnan 2165a6d42e7dSPeter Dunlap stmf_post_task(task, NULL); 2166a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2167a6d42e7dSPeter Dunlap } 2168a6d42e7dSPeter Dunlap } 2169a6d42e7dSPeter Dunlap 2170a6d42e7dSPeter Dunlap void 2171a6d42e7dSPeter Dunlap iscsit_deferred_dispatch(idm_pdu_t *rx_pdu) 2172a6d42e7dSPeter Dunlap { 2173a6d42e7dSPeter Dunlap iscsit_conn_t *ict = rx_pdu->isp_ic->ic_handle; 2174a6d42e7dSPeter Dunlap 2175a6d42e7dSPeter Dunlap /* 2176a6d42e7dSPeter Dunlap * If the connection has been lost then ignore new PDU's 2177a6d42e7dSPeter Dunlap */ 2178a6d42e7dSPeter Dunlap mutex_enter(&ict->ict_mutex); 2179a6d42e7dSPeter Dunlap if (ict->ict_lost) { 2180a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 2181a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 2182a6d42e7dSPeter Dunlap return; 2183a6d42e7dSPeter Dunlap } 2184a6d42e7dSPeter Dunlap 2185a6d42e7dSPeter Dunlap /* 2186a6d42e7dSPeter Dunlap * Grab a hold on the connection to prevent it from going away 2187a6d42e7dSPeter Dunlap * between now and when the taskq function is called. 2188a6d42e7dSPeter Dunlap */ 2189a6d42e7dSPeter Dunlap iscsit_conn_dispatch_hold(ict); 2190a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 2191a6d42e7dSPeter Dunlap 21926319b0c7SGarrett D'Amore taskq_dispatch_ent(iscsit_global.global_dispatch_taskq, 21936319b0c7SGarrett D'Amore iscsit_deferred, rx_pdu, 0, &rx_pdu->isp_tqent); 2194a6d42e7dSPeter Dunlap } 2195a6d42e7dSPeter Dunlap 2196a6d42e7dSPeter Dunlap static void 2197a6d42e7dSPeter Dunlap iscsit_deferred(void *rx_pdu_void) 2198a6d42e7dSPeter Dunlap { 2199d618d68dSPriya Krishnan idm_pdu_t *rx_pdu = rx_pdu_void; 2200d618d68dSPriya Krishnan idm_conn_t *ic = rx_pdu->isp_ic; 2201d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 2202a6d42e7dSPeter Dunlap 2203d618d68dSPriya Krishnan /* 2204d618d68dSPriya Krishnan * NOP and Task Management Commands can be marked for immediate 2205d618d68dSPriya Krishnan * delivery. Commands marked as 'Immediate' are to be considered 2206d618d68dSPriya Krishnan * for execution as soon as they arrive on the target. So these 2207d618d68dSPriya Krishnan * should not be checked for sequence order and put in a queue. 2208d618d68dSPriya Krishnan * The CmdSN is not advanced for Immediate Commands. 2209d618d68dSPriya Krishnan */ 2210a6d42e7dSPeter Dunlap switch (IDM_PDU_OPCODE(rx_pdu)) { 2211a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_OUT: 2212d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 2213d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 2214d618d68dSPriya Krishnan iscsit_pdu_op_noop(ict, rx_pdu); 2215d618d68dSPriya Krishnan } 2216a6d42e7dSPeter Dunlap break; 2217a6d42e7dSPeter Dunlap case ISCSI_OP_LOGIN_CMD: 2218a6d42e7dSPeter Dunlap iscsit_pdu_op_login_cmd(ict, rx_pdu); 2219d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); 2220d618d68dSPriya Krishnan return; 2221a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_CMD: 2222d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 2223d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 2224d618d68dSPriya Krishnan iscsit_pdu_op_text_cmd(ict, rx_pdu); 2225d618d68dSPriya Krishnan } 2226a6d42e7dSPeter Dunlap break; 2227a6d42e7dSPeter Dunlap case ISCSI_OP_LOGOUT_CMD: 2228d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 2229d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 2230d618d68dSPriya Krishnan iscsit_pdu_op_logout_cmd(ict, rx_pdu); 2231d618d68dSPriya Krishnan } 2232a6d42e7dSPeter Dunlap break; 2233a6d42e7dSPeter Dunlap default: 2234a6d42e7dSPeter Dunlap /* Protocol error. IDM should have caught this */ 2235a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 2236a6d42e7dSPeter Dunlap ASSERT(0); 2237a6d42e7dSPeter Dunlap break; 2238a6d42e7dSPeter Dunlap } 2239d618d68dSPriya Krishnan /* 2240d618d68dSPriya Krishnan * Check if there are other PDUs in the session staging queue 2241d618d68dSPriya Krishnan * waiting to be posted to SCSI layer. 2242d618d68dSPriya Krishnan */ 2243d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(ict->ict_sess); 2244a6d42e7dSPeter Dunlap 2245a6d42e7dSPeter Dunlap iscsit_conn_dispatch_rele(ict); 2246a6d42e7dSPeter Dunlap } 2247a6d42e7dSPeter Dunlap 2248a6d42e7dSPeter Dunlap static void 2249a6d42e7dSPeter Dunlap iscsit_send_direct_scsi_resp(iscsit_conn_t *ict, idm_pdu_t *rx_pdu, 2250a6d42e7dSPeter Dunlap uint8_t response, uint8_t cmd_status) 2251a6d42e7dSPeter Dunlap { 2252a6d42e7dSPeter Dunlap idm_pdu_t *rsp_pdu; 2253a6d42e7dSPeter Dunlap idm_conn_t *ic; 2254a6d42e7dSPeter Dunlap iscsi_scsi_rsp_hdr_t *resp; 225530e7468fSPeter Dunlap iscsi_scsi_cmd_hdr_t *req = 225630e7468fSPeter Dunlap (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 2257a6d42e7dSPeter Dunlap 2258a6d42e7dSPeter Dunlap ic = ict->ict_ic; 2259a6d42e7dSPeter Dunlap 2260a6d42e7dSPeter Dunlap rsp_pdu = idm_pdu_alloc(sizeof (iscsi_scsi_rsp_hdr_t), 0); 2261a6d42e7dSPeter Dunlap idm_pdu_init(rsp_pdu, ic, NULL, NULL); 226260220f10SPriya Krishnan /* 226360220f10SPriya Krishnan * StatSN is incremented by 1 for every response sent on 226460220f10SPriya Krishnan * a connection except for responses sent as a result of 226560220f10SPriya Krishnan * a retry or SNACK 226660220f10SPriya Krishnan */ 226760220f10SPriya Krishnan rsp_pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 226860220f10SPriya Krishnan 2269a6d42e7dSPeter Dunlap resp = (iscsi_scsi_rsp_hdr_t *)rsp_pdu->isp_hdr; 2270a6d42e7dSPeter Dunlap 2271a6d42e7dSPeter Dunlap resp->opcode = ISCSI_OP_SCSI_RSP; 2272a6d42e7dSPeter Dunlap resp->flags = ISCSI_FLAG_FINAL; 2273a6d42e7dSPeter Dunlap resp->response = response; 2274a6d42e7dSPeter Dunlap resp->cmd_status = cmd_status; 227530e7468fSPeter Dunlap resp->itt = req->itt; 227630e7468fSPeter Dunlap if ((response == ISCSI_STATUS_CMD_COMPLETED) && 227730e7468fSPeter Dunlap (req->data_length != 0) && 227830e7468fSPeter Dunlap ((req->flags & ISCSI_FLAG_CMD_READ) || 227930e7468fSPeter Dunlap (req->flags & ISCSI_FLAG_CMD_WRITE))) { 228030e7468fSPeter Dunlap resp->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 228130e7468fSPeter Dunlap resp->residual_count = req->data_length; 228230e7468fSPeter Dunlap } 228330e7468fSPeter Dunlap 228430e7468fSPeter Dunlap DTRACE_PROBE4(iscsi__scsi__direct__response, 228530e7468fSPeter Dunlap iscsit_conn_t *, ict, 228630e7468fSPeter Dunlap uint8_t, resp->response, 228730e7468fSPeter Dunlap uint8_t, resp->cmd_status, 228830e7468fSPeter Dunlap idm_pdu_t *, rsp_pdu); 2289a6d42e7dSPeter Dunlap 2290a6d42e7dSPeter Dunlap iscsit_pdu_tx(rsp_pdu); 2291a6d42e7dSPeter Dunlap } 2292a6d42e7dSPeter Dunlap 2293a6d42e7dSPeter Dunlap void 2294a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(idm_pdu_t *tm_resp_pdu, uint8_t tm_status) 2295a6d42e7dSPeter Dunlap { 2296a6d42e7dSPeter Dunlap iscsi_scsi_task_mgt_rsp_hdr_t *tm_resp; 2297a6d42e7dSPeter Dunlap 229860220f10SPriya Krishnan /* 229960220f10SPriya Krishnan * The target must take note of the last-sent StatSN. 230060220f10SPriya Krishnan * The StatSN is to be incremented after sending a 230160220f10SPriya Krishnan * task management response. Digest recovery can only 230260220f10SPriya Krishnan * work if StatSN is incremented. 230360220f10SPriya Krishnan */ 230460220f10SPriya Krishnan tm_resp_pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 2305a6d42e7dSPeter Dunlap tm_resp = (iscsi_scsi_task_mgt_rsp_hdr_t *)tm_resp_pdu->isp_hdr; 2306a6d42e7dSPeter Dunlap tm_resp->response = tm_status; 230730e7468fSPeter Dunlap 230830e7468fSPeter Dunlap DTRACE_PROBE3(iscsi__scsi__tm__response, 230930e7468fSPeter Dunlap iscsit_conn_t *, tm_resp_pdu->isp_ic->ic_handle, 231030e7468fSPeter Dunlap uint8_t, tm_resp->response, 231130e7468fSPeter Dunlap idm_pdu_t *, tm_resp_pdu); 2312a6d42e7dSPeter Dunlap iscsit_pdu_tx(tm_resp_pdu); 2313a6d42e7dSPeter Dunlap } 2314a6d42e7dSPeter Dunlap 2315a6d42e7dSPeter Dunlap void 2316a6d42e7dSPeter Dunlap iscsit_op_scsi_task_mgmt(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2317a6d42e7dSPeter Dunlap { 2318a6d42e7dSPeter Dunlap idm_pdu_t *tm_resp_pdu; 2319a6d42e7dSPeter Dunlap iscsit_task_t *itask; 2320a6d42e7dSPeter Dunlap iscsit_task_t *tm_itask; 2321a6d42e7dSPeter Dunlap scsi_task_t *task; 2322a6d42e7dSPeter Dunlap iscsi_scsi_task_mgt_hdr_t *iscsi_tm = 2323a6d42e7dSPeter Dunlap (iscsi_scsi_task_mgt_hdr_t *)rx_pdu->isp_hdr; 2324a6d42e7dSPeter Dunlap iscsi_scsi_task_mgt_rsp_hdr_t *iscsi_tm_rsp = 2325a6d42e7dSPeter Dunlap (iscsi_scsi_task_mgt_rsp_hdr_t *)rx_pdu->isp_hdr; 2326a6d42e7dSPeter Dunlap uint32_t rtt, cmdsn, refcmdsn; 2327a6d42e7dSPeter Dunlap uint8_t tm_func; 2328a6d42e7dSPeter Dunlap 2329a6d42e7dSPeter Dunlap /* 2330a6d42e7dSPeter Dunlap * Setup response PDU (response field will get filled in later) 2331a6d42e7dSPeter Dunlap */ 2332a6d42e7dSPeter Dunlap tm_resp_pdu = idm_pdu_alloc(sizeof (iscsi_scsi_task_mgt_rsp_hdr_t), 0); 2333a6d42e7dSPeter Dunlap if (tm_resp_pdu == NULL) { 2334a6d42e7dSPeter Dunlap /* Can't respond, just drop it */ 2335a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2336a6d42e7dSPeter Dunlap return; 2337a6d42e7dSPeter Dunlap } 2338a6d42e7dSPeter Dunlap idm_pdu_init(tm_resp_pdu, ict->ict_ic, NULL, NULL); 2339a6d42e7dSPeter Dunlap iscsi_tm_rsp = (iscsi_scsi_task_mgt_rsp_hdr_t *)tm_resp_pdu->isp_hdr; 2340a6d42e7dSPeter Dunlap bzero(iscsi_tm_rsp, sizeof (iscsi_scsi_task_mgt_rsp_hdr_t)); 2341a6d42e7dSPeter Dunlap iscsi_tm_rsp->opcode = ISCSI_OP_SCSI_TASK_MGT_RSP; 2342a6d42e7dSPeter Dunlap iscsi_tm_rsp->flags = ISCSI_FLAG_FINAL; 2343a6d42e7dSPeter Dunlap iscsi_tm_rsp->itt = rx_pdu->isp_hdr->itt; 2344a6d42e7dSPeter Dunlap 2345a6d42e7dSPeter Dunlap /* 2346a6d42e7dSPeter Dunlap * Figure out what we're being asked to do. 2347a6d42e7dSPeter Dunlap */ 234830e7468fSPeter Dunlap DTRACE_PROBE4(iscsi__scsi__tm__request, 234930e7468fSPeter Dunlap iscsit_conn_t *, ict, 235030e7468fSPeter Dunlap uint8_t, (iscsi_tm->function & ISCSI_FLAG_TASK_MGMT_FUNCTION_MASK), 235130e7468fSPeter Dunlap uint32_t, iscsi_tm->rtt, 235230e7468fSPeter Dunlap idm_pdu_t *, rx_pdu); 2353a6d42e7dSPeter Dunlap switch (iscsi_tm->function & ISCSI_FLAG_TASK_MGMT_FUNCTION_MASK) { 2354a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_ABORT_TASK: 2355a6d42e7dSPeter Dunlap /* 2356a6d42e7dSPeter Dunlap * STMF doesn't currently support the "abort task" task 2357a6d42e7dSPeter Dunlap * management command although it does support aborting 2358a6d42e7dSPeter Dunlap * an individual task. We'll get STMF to abort the task 2359a6d42e7dSPeter Dunlap * for us but handle the details of the task management 2360a6d42e7dSPeter Dunlap * command ourselves. 2361a6d42e7dSPeter Dunlap * 2362a6d42e7dSPeter Dunlap * Find the task associated with the referenced task tag. 2363a6d42e7dSPeter Dunlap */ 2364a6d42e7dSPeter Dunlap rtt = iscsi_tm->rtt; 2365a6d42e7dSPeter Dunlap itask = (iscsit_task_t *)idm_task_find_by_handle(ict->ict_ic, 2366a6d42e7dSPeter Dunlap (uintptr_t)rtt); 2367a6d42e7dSPeter Dunlap 2368a6d42e7dSPeter Dunlap if (itask == NULL) { 2369a6d42e7dSPeter Dunlap cmdsn = ntohl(iscsi_tm->cmdsn); 2370a6d42e7dSPeter Dunlap refcmdsn = ntohl(iscsi_tm->refcmdsn); 2371a6d42e7dSPeter Dunlap 2372a6d42e7dSPeter Dunlap /* 2373d618d68dSPriya Krishnan * Task was not found. But the SCSI command could be 2374d618d68dSPriya Krishnan * on the rxpdu wait queue. If RefCmdSN is within 2375d618d68dSPriya Krishnan * the CmdSN window and less than CmdSN of the TM 2376d618d68dSPriya Krishnan * function, return "Function Complete". Otherwise, 2377d618d68dSPriya Krishnan * return "Task Does Not Exist". 2378a6d42e7dSPeter Dunlap */ 2379a6d42e7dSPeter Dunlap 2380a6d42e7dSPeter Dunlap if (iscsit_cmdsn_in_window(ict, refcmdsn) && 2381d618d68dSPriya Krishnan iscsit_sna_lt(refcmdsn, cmdsn)) { 2382d618d68dSPriya Krishnan mutex_enter(&ict->ict_sess->ist_sn_mutex); 2383d618d68dSPriya Krishnan (void) iscsit_remove_pdu_from_queue( 2384d618d68dSPriya Krishnan ict->ict_sess, refcmdsn); 2385d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); 2386d618d68dSPriya Krishnan mutex_exit(&ict->ict_sess->ist_sn_mutex); 2387a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2388a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_COMPLETE); 2389a6d42e7dSPeter Dunlap } else { 2390a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2391a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_NO_TASK); 2392a6d42e7dSPeter Dunlap } 2393a6d42e7dSPeter Dunlap } else { 2394a6d42e7dSPeter Dunlap 2395a6d42e7dSPeter Dunlap /* 2396a6d42e7dSPeter Dunlap * Tell STMF to abort the task. This will do no harm 2397a6d42e7dSPeter Dunlap * if the task is already complete. 2398a6d42e7dSPeter Dunlap */ 2399a6d42e7dSPeter Dunlap stmf_abort(STMF_QUEUE_TASK_ABORT, itask->it_stmf_task, 2400a6d42e7dSPeter Dunlap STMF_ABORTED, NULL); 2401a6d42e7dSPeter Dunlap 2402a6d42e7dSPeter Dunlap /* 2403a6d42e7dSPeter Dunlap * Make sure the task hasn't already completed 2404a6d42e7dSPeter Dunlap */ 2405a6d42e7dSPeter Dunlap mutex_enter(&itask->it_idm_task->idt_mutex); 2406a6d42e7dSPeter Dunlap if ((itask->it_idm_task->idt_state == TASK_COMPLETE) || 2407a6d42e7dSPeter Dunlap (itask->it_idm_task->idt_state == TASK_IDLE)) { 2408a6d42e7dSPeter Dunlap /* 2409a6d42e7dSPeter Dunlap * Task is complete, return "Task Does Not 2410a6d42e7dSPeter Dunlap * Exist" 2411a6d42e7dSPeter Dunlap */ 2412a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 2413a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2414a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_NO_TASK); 2415a6d42e7dSPeter Dunlap } else { 2416a6d42e7dSPeter Dunlap /* 2417a6d42e7dSPeter Dunlap * STMF is now aborting the task, return 2418a6d42e7dSPeter Dunlap * "Function Complete" 2419a6d42e7dSPeter Dunlap */ 2420a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 2421a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2422a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_COMPLETE); 2423a6d42e7dSPeter Dunlap } 2424a6d42e7dSPeter Dunlap idm_task_rele(itask->it_idm_task); 2425a6d42e7dSPeter Dunlap } 2426a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2427a6d42e7dSPeter Dunlap return; 2428a6d42e7dSPeter Dunlap 2429a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_ABORT_TASK_SET: 2430a6d42e7dSPeter Dunlap tm_func = TM_ABORT_TASK_SET; 2431a6d42e7dSPeter Dunlap break; 2432a6d42e7dSPeter Dunlap 2433a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_CLEAR_ACA: 2434a6d42e7dSPeter Dunlap tm_func = TM_CLEAR_ACA; 2435a6d42e7dSPeter Dunlap break; 2436a6d42e7dSPeter Dunlap 2437a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_CLEAR_TASK_SET: 2438a6d42e7dSPeter Dunlap tm_func = TM_CLEAR_TASK_SET; 2439a6d42e7dSPeter Dunlap break; 2440a6d42e7dSPeter Dunlap 2441a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: 2442a6d42e7dSPeter Dunlap tm_func = TM_LUN_RESET; 2443a6d42e7dSPeter Dunlap break; 2444a6d42e7dSPeter Dunlap 2445a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_TARGET_WARM_RESET: 2446a6d42e7dSPeter Dunlap tm_func = TM_TARGET_WARM_RESET; 2447a6d42e7dSPeter Dunlap break; 2448a6d42e7dSPeter Dunlap 2449a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_TARGET_COLD_RESET: 2450a6d42e7dSPeter Dunlap tm_func = TM_TARGET_COLD_RESET; 2451a6d42e7dSPeter Dunlap break; 2452a6d42e7dSPeter Dunlap 2453a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_TASK_REASSIGN: 2454a6d42e7dSPeter Dunlap /* 2455a6d42e7dSPeter Dunlap * We do not currently support allegiance reassignment. When 2456a6d42e7dSPeter Dunlap * we start supporting ERL1+, we will need to. 2457a6d42e7dSPeter Dunlap */ 2458a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2459a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_NO_ALLG_REASSN); 2460a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2461a6d42e7dSPeter Dunlap return; 2462a6d42e7dSPeter Dunlap 2463a6d42e7dSPeter Dunlap default: 2464a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2465a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_REJECTED); 2466a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2467a6d42e7dSPeter Dunlap return; 2468a6d42e7dSPeter Dunlap } 2469a6d42e7dSPeter Dunlap 2470a6d42e7dSPeter Dunlap tm_itask = iscsit_tm_task_alloc(ict); 2471a6d42e7dSPeter Dunlap if (tm_itask == NULL) { 2472a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2473a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_REJECTED); 2474a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2475a6d42e7dSPeter Dunlap return; 2476a6d42e7dSPeter Dunlap } 2477a6d42e7dSPeter Dunlap 2478a6d42e7dSPeter Dunlap 2479a6d42e7dSPeter Dunlap task = stmf_task_alloc(ict->ict_sess->ist_lport, 2480a6d42e7dSPeter Dunlap ict->ict_sess->ist_stmf_sess, iscsi_tm->lun, 2481a6d42e7dSPeter Dunlap 0, STMF_TASK_EXT_NONE); 2482a6d42e7dSPeter Dunlap if (task == NULL) { 2483a6d42e7dSPeter Dunlap /* 2484a6d42e7dSPeter Dunlap * If this happens, either the LU is in reset, couldn't 2485a6d42e7dSPeter Dunlap * get memory, or some other condition in which we simply 2486a6d42e7dSPeter Dunlap * can't complete this request. It would be nice to return 2487a6d42e7dSPeter Dunlap * an error code like "busy" but the closest we have is 2488a6d42e7dSPeter Dunlap * "rejected". 2489a6d42e7dSPeter Dunlap */ 2490a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2491a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_REJECTED); 2492a6d42e7dSPeter Dunlap iscsit_tm_task_free(tm_itask); 2493a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2494a6d42e7dSPeter Dunlap return; 2495a6d42e7dSPeter Dunlap } 2496a6d42e7dSPeter Dunlap 2497a6d42e7dSPeter Dunlap tm_itask->it_tm_pdu = tm_resp_pdu; 2498a6d42e7dSPeter Dunlap tm_itask->it_stmf_task = task; 2499a6d42e7dSPeter Dunlap task->task_port_private = tm_itask; 2500a6d42e7dSPeter Dunlap task->task_mgmt_function = tm_func; 2501a6d42e7dSPeter Dunlap task->task_additional_flags = TASK_AF_NO_EXPECTED_XFER_LENGTH; 2502a6d42e7dSPeter Dunlap task->task_priority = 0; 2503a6d42e7dSPeter Dunlap task->task_max_nbufs = STMF_BUFS_MAX; 2504a6d42e7dSPeter Dunlap task->task_cmd_seq_no = iscsi_tm->itt; 2505a6d42e7dSPeter Dunlap task->task_expected_xfer_length = 0; 2506a6d42e7dSPeter Dunlap 2507a6d42e7dSPeter Dunlap stmf_post_task(task, NULL); 2508a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2509a6d42e7dSPeter Dunlap } 2510a6d42e7dSPeter Dunlap 2511a6d42e7dSPeter Dunlap static void 2512a6d42e7dSPeter Dunlap iscsit_pdu_op_noop(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2513a6d42e7dSPeter Dunlap { 2514a6d42e7dSPeter Dunlap iscsi_nop_out_hdr_t *out = (iscsi_nop_out_hdr_t *)rx_pdu->isp_hdr; 2515a6d42e7dSPeter Dunlap iscsi_nop_in_hdr_t *in; 2516a6d42e7dSPeter Dunlap int resp_datalen; 2517a6d42e7dSPeter Dunlap idm_pdu_t *resp; 2518a6d42e7dSPeter Dunlap 2519a6d42e7dSPeter Dunlap /* Ignore the response from initiator */ 252072cf3143Speter dunlap if ((out->itt == ISCSI_RSVD_TASK_TAG) || 252172cf3143Speter dunlap (out->ttt != ISCSI_RSVD_TASK_TAG)) { 252272cf3143Speter dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2523a6d42e7dSPeter Dunlap return; 252472cf3143Speter dunlap } 2525a6d42e7dSPeter Dunlap 2526a6d42e7dSPeter Dunlap /* Allocate a PDU to respond */ 2527a6d42e7dSPeter Dunlap resp_datalen = ntoh24(out->dlength); 2528a6d42e7dSPeter Dunlap resp = idm_pdu_alloc(sizeof (iscsi_hdr_t), resp_datalen); 2529a6d42e7dSPeter Dunlap idm_pdu_init(resp, ict->ict_ic, NULL, NULL); 2530a6d42e7dSPeter Dunlap if (resp_datalen > 0) { 2531a6d42e7dSPeter Dunlap bcopy(rx_pdu->isp_data, resp->isp_data, resp_datalen); 2532a6d42e7dSPeter Dunlap } 2533a6d42e7dSPeter Dunlap 253460220f10SPriya Krishnan /* 253560220f10SPriya Krishnan * When sending a NOP-In as a response to a NOP-Out from the initiator, 253660220f10SPriya Krishnan * the target must respond with the same initiator task tag that was 253760220f10SPriya Krishnan * provided in the NOP-Out request, the target transfer tag must be 253860220f10SPriya Krishnan * ISCSI_RSVD_TASK_TAG (0xffffffff) and StatSN will contain the next 253960220f10SPriya Krishnan * status sequence number. The StatSN for the connection is advanced 254060220f10SPriya Krishnan * after this PDU is sent. 254160220f10SPriya Krishnan */ 2542a6d42e7dSPeter Dunlap in = (iscsi_nop_in_hdr_t *)resp->isp_hdr; 2543a6d42e7dSPeter Dunlap bzero(in, sizeof (*in)); 2544a6d42e7dSPeter Dunlap in->opcode = ISCSI_OP_NOOP_IN; 2545a6d42e7dSPeter Dunlap in->flags = ISCSI_FLAG_FINAL; 2546a6d42e7dSPeter Dunlap bcopy(out->lun, in->lun, 8); 2547a6d42e7dSPeter Dunlap in->itt = out->itt; 2548a6d42e7dSPeter Dunlap in->ttt = ISCSI_RSVD_TASK_TAG; 2549a6d42e7dSPeter Dunlap hton24(in->dlength, resp_datalen); 255060220f10SPriya Krishnan resp->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 2551a6d42e7dSPeter Dunlap /* Any other field in resp to be set? */ 2552a6d42e7dSPeter Dunlap iscsit_pdu_tx(resp); 2553a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2554a6d42e7dSPeter Dunlap } 2555a6d42e7dSPeter Dunlap 2556a6d42e7dSPeter Dunlap static void 2557a6d42e7dSPeter Dunlap iscsit_pdu_op_login_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2558a6d42e7dSPeter Dunlap { 2559a6d42e7dSPeter Dunlap 2560a6d42e7dSPeter Dunlap /* 2561a6d42e7dSPeter Dunlap * Submit PDU to login state machine. State machine will free the 2562a6d42e7dSPeter Dunlap * PDU. 2563a6d42e7dSPeter Dunlap */ 2564a6d42e7dSPeter Dunlap iscsit_login_sm_event(ict, ILE_LOGIN_RCV, rx_pdu); 2565a6d42e7dSPeter Dunlap } 2566a6d42e7dSPeter Dunlap 2567a6d42e7dSPeter Dunlap void 2568a6d42e7dSPeter Dunlap iscsit_pdu_op_logout_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2569a6d42e7dSPeter Dunlap { 2570a6d42e7dSPeter Dunlap iscsi_logout_hdr_t *logout_req = 2571a6d42e7dSPeter Dunlap (iscsi_logout_hdr_t *)rx_pdu->isp_hdr; 2572a6d42e7dSPeter Dunlap iscsi_logout_rsp_hdr_t *logout_rsp; 2573a6d42e7dSPeter Dunlap idm_pdu_t *resp; 2574a6d42e7dSPeter Dunlap 2575a6d42e7dSPeter Dunlap /* Allocate a PDU to respond */ 2576a6d42e7dSPeter Dunlap resp = idm_pdu_alloc(sizeof (iscsi_hdr_t), 0); 2577a6d42e7dSPeter Dunlap idm_pdu_init(resp, ict->ict_ic, NULL, NULL); 257860220f10SPriya Krishnan /* 257960220f10SPriya Krishnan * The StatSN is to be sent to the initiator, 258060220f10SPriya Krishnan * it is not required to increment the number 258160220f10SPriya Krishnan * as the connection is terminating. 258260220f10SPriya Krishnan */ 258360220f10SPriya Krishnan resp->isp_flags |= IDM_PDU_SET_STATSN; 2584a6d42e7dSPeter Dunlap /* 2585a6d42e7dSPeter Dunlap * Logout results in the immediate termination of all tasks except 2586a6d42e7dSPeter Dunlap * if the logout reason is ISCSI_LOGOUT_REASON_RECOVERY. The 2587a6d42e7dSPeter Dunlap * connection state machine will drive this task cleanup automatically 2588a6d42e7dSPeter Dunlap * so we don't need to handle that here. 2589a6d42e7dSPeter Dunlap */ 2590a6d42e7dSPeter Dunlap logout_rsp = (iscsi_logout_rsp_hdr_t *)resp->isp_hdr; 2591a6d42e7dSPeter Dunlap bzero(logout_rsp, sizeof (*logout_rsp)); 2592a6d42e7dSPeter Dunlap logout_rsp->opcode = ISCSI_OP_LOGOUT_RSP; 2593a6d42e7dSPeter Dunlap logout_rsp->flags = ISCSI_FLAG_FINAL; 2594a6d42e7dSPeter Dunlap logout_rsp->itt = logout_req->itt; 2595a6d42e7dSPeter Dunlap if ((logout_req->flags & ISCSI_FLAG_LOGOUT_REASON_MASK) > 2596a6d42e7dSPeter Dunlap ISCSI_LOGOUT_REASON_RECOVERY) { 2597a6d42e7dSPeter Dunlap logout_rsp->response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; 2598a6d42e7dSPeter Dunlap } else { 2599a6d42e7dSPeter Dunlap logout_rsp->response = ISCSI_LOGOUT_SUCCESS; 2600a6d42e7dSPeter Dunlap } 2601a6d42e7dSPeter Dunlap 2602a6d42e7dSPeter Dunlap iscsit_pdu_tx(resp); 2603a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2604a6d42e7dSPeter Dunlap } 2605a6d42e7dSPeter Dunlap 2606a6d42e7dSPeter Dunlap /* 2607a6d42e7dSPeter Dunlap * Calculate the number of outstanding commands we can process 2608a6d42e7dSPeter Dunlap */ 2609a6d42e7dSPeter Dunlap int 2610a6d42e7dSPeter Dunlap iscsit_cmd_window() 2611a6d42e7dSPeter Dunlap { 2612d618d68dSPriya Krishnan /* 2613d618d68dSPriya Krishnan * Instead of using a pre-defined constant for the command window, 2614d618d68dSPriya Krishnan * it should be made confiurable and dynamic. With MC/S, sequence 2615d618d68dSPriya Krishnan * numbers will be used up at a much faster rate than with SC/S. 2616d618d68dSPriya Krishnan */ 2617d618d68dSPriya Krishnan return (ISCSIT_MAX_WINDOW); 2618a6d42e7dSPeter Dunlap } 2619a6d42e7dSPeter Dunlap 2620a6d42e7dSPeter Dunlap /* 2621a6d42e7dSPeter Dunlap * Set local registers based on incoming PDU 2622a6d42e7dSPeter Dunlap */ 2623a6d42e7dSPeter Dunlap void 2624a6d42e7dSPeter Dunlap iscsit_set_cmdsn(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2625a6d42e7dSPeter Dunlap { 2626a6d42e7dSPeter Dunlap iscsit_sess_t *ist; 2627a6d42e7dSPeter Dunlap iscsi_scsi_cmd_hdr_t *req; 2628a6d42e7dSPeter Dunlap 2629a6d42e7dSPeter Dunlap ist = ict->ict_sess; 2630a6d42e7dSPeter Dunlap 2631a6d42e7dSPeter Dunlap req = (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 2632d618d68dSPriya Krishnan if (req->opcode & ISCSI_OP_IMMEDIATE) { 2633d618d68dSPriya Krishnan /* no cmdsn increment for immediate PDUs */ 2634d618d68dSPriya Krishnan return; 2635d618d68dSPriya Krishnan } 2636a6d42e7dSPeter Dunlap 2637d618d68dSPriya Krishnan /* Ensure that the ExpCmdSN advances in an orderly manner */ 2638d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 2639a6d42e7dSPeter Dunlap ist->ist_expcmdsn = ntohl(req->cmdsn) + 1; 2640a6d42e7dSPeter Dunlap ist->ist_maxcmdsn = ntohl(req->cmdsn) + iscsit_cmd_window(); 2641d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 2642a6d42e7dSPeter Dunlap } 2643a6d42e7dSPeter Dunlap 2644a6d42e7dSPeter Dunlap /* 2645a6d42e7dSPeter Dunlap * Wrapper funtion, calls iscsi_calc_rspsn and idm_pdu_tx 2646a6d42e7dSPeter Dunlap */ 2647a6d42e7dSPeter Dunlap void 2648a6d42e7dSPeter Dunlap iscsit_pdu_tx(idm_pdu_t *pdu) 2649a6d42e7dSPeter Dunlap { 2650a6d42e7dSPeter Dunlap iscsit_conn_t *ict = pdu->isp_ic->ic_handle; 265160220f10SPriya Krishnan iscsi_scsi_rsp_hdr_t *rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 265260220f10SPriya Krishnan iscsit_sess_t *ist = ict->ict_sess; 2653a6d42e7dSPeter Dunlap 2654a6d42e7dSPeter Dunlap /* 265560220f10SPriya Krishnan * The command sequence numbers are session-wide and must stay 265660220f10SPriya Krishnan * consistent across the transfer, so protect the cmdsn with a 2657d618d68dSPriya Krishnan * mutex lock on the session. The status sequence number will 265860220f10SPriya Krishnan * be updated just before the transport layer transmits the PDU. 2659a6d42e7dSPeter Dunlap */ 266060220f10SPriya Krishnan 2661d618d68dSPriya Krishnan mutex_enter(&ict->ict_sess->ist_sn_mutex); 266260220f10SPriya Krishnan /* Set ExpCmdSN and MaxCmdSN */ 266360220f10SPriya Krishnan rsp->maxcmdsn = htonl(ist->ist_maxcmdsn); 266460220f10SPriya Krishnan rsp->expcmdsn = htonl(ist->ist_expcmdsn); 2665a6d42e7dSPeter Dunlap idm_pdu_tx(pdu); 2666d618d68dSPriya Krishnan mutex_exit(&ict->ict_sess->ist_sn_mutex); 2667a6d42e7dSPeter Dunlap } 2668a6d42e7dSPeter Dunlap 2669a6d42e7dSPeter Dunlap /* 2670a6d42e7dSPeter Dunlap * Internal functions 2671a6d42e7dSPeter Dunlap */ 2672a6d42e7dSPeter Dunlap 2673a6d42e7dSPeter Dunlap void 2674a6d42e7dSPeter Dunlap iscsit_send_async_event(iscsit_conn_t *ict, uint8_t event) 2675a6d42e7dSPeter Dunlap { 2676a6d42e7dSPeter Dunlap idm_pdu_t *abt; 2677a6d42e7dSPeter Dunlap iscsi_async_evt_hdr_t *async_abt; 2678a6d42e7dSPeter Dunlap 2679a6d42e7dSPeter Dunlap /* 2680a6d42e7dSPeter Dunlap * Get a PDU to build the abort request. 2681a6d42e7dSPeter Dunlap */ 2682a6d42e7dSPeter Dunlap abt = idm_pdu_alloc(sizeof (iscsi_hdr_t), 0); 2683a6d42e7dSPeter Dunlap if (abt == NULL) { 2684a6d42e7dSPeter Dunlap idm_conn_event(ict->ict_ic, CE_TRANSPORT_FAIL, NULL); 2685a6d42e7dSPeter Dunlap return; 2686a6d42e7dSPeter Dunlap } 2687a6d42e7dSPeter Dunlap 268860220f10SPriya Krishnan /* 268960220f10SPriya Krishnan * A asynchronous message is sent by the target to request a logout. 269060220f10SPriya Krishnan * The StatSN for the connection is advanced after the PDU is sent 269160220f10SPriya Krishnan * to allow for initiator and target state synchronization. 269260220f10SPriya Krishnan */ 269372cf3143Speter dunlap idm_pdu_init(abt, ict->ict_ic, NULL, NULL); 2694a6d42e7dSPeter Dunlap abt->isp_datalen = 0; 269560220f10SPriya Krishnan abt->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 2696a6d42e7dSPeter Dunlap 2697a6d42e7dSPeter Dunlap async_abt = (iscsi_async_evt_hdr_t *)abt->isp_hdr; 2698a6d42e7dSPeter Dunlap bzero(async_abt, sizeof (*async_abt)); 2699a6d42e7dSPeter Dunlap async_abt->opcode = ISCSI_OP_ASYNC_EVENT; 2700a6d42e7dSPeter Dunlap async_abt->async_event = event; 2701a6d42e7dSPeter Dunlap async_abt->flags = ISCSI_FLAG_FINAL; 2702a6d42e7dSPeter Dunlap async_abt->rsvd4[0] = 0xff; 2703a6d42e7dSPeter Dunlap async_abt->rsvd4[1] = 0xff; 2704a6d42e7dSPeter Dunlap async_abt->rsvd4[2] = 0xff; 2705a6d42e7dSPeter Dunlap async_abt->rsvd4[3] = 0xff; 2706a6d42e7dSPeter Dunlap 2707a6d42e7dSPeter Dunlap switch (event) { 2708a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_REQUEST_LOGOUT: 2709a6d42e7dSPeter Dunlap async_abt->param3 = htons(IDM_LOGOUT_SECONDS); 2710a6d42e7dSPeter Dunlap break; 2711a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_SCSI_EVENT: 2712a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_DROPPING_CONNECTION: 2713a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_DROPPING_ALL_CONNECTIONS: 2714a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_PARAM_NEGOTIATION: 2715a6d42e7dSPeter Dunlap default: 2716a6d42e7dSPeter Dunlap ASSERT(0); 2717a6d42e7dSPeter Dunlap } 2718a6d42e7dSPeter Dunlap 2719a6d42e7dSPeter Dunlap iscsit_pdu_tx(abt); 2720a6d42e7dSPeter Dunlap } 2721a6d42e7dSPeter Dunlap 272272cf3143Speter dunlap void 272372cf3143Speter dunlap iscsit_send_reject(iscsit_conn_t *ict, idm_pdu_t *rejected_pdu, uint8_t reason) 272472cf3143Speter dunlap { 272572cf3143Speter dunlap idm_pdu_t *reject_pdu; 272672cf3143Speter dunlap iscsi_reject_rsp_hdr_t *reject; 272772cf3143Speter dunlap 272872cf3143Speter dunlap /* 272972cf3143Speter dunlap * Get a PDU to build the abort request. 273072cf3143Speter dunlap */ 273172cf3143Speter dunlap reject_pdu = idm_pdu_alloc(sizeof (iscsi_hdr_t), 273272cf3143Speter dunlap rejected_pdu->isp_hdrlen); 273372cf3143Speter dunlap if (reject_pdu == NULL) { 273472cf3143Speter dunlap idm_conn_event(ict->ict_ic, CE_TRANSPORT_FAIL, NULL); 273572cf3143Speter dunlap return; 273672cf3143Speter dunlap } 273772cf3143Speter dunlap idm_pdu_init(reject_pdu, ict->ict_ic, NULL, NULL); 273860220f10SPriya Krishnan /* StatSN is advanced after a Reject PDU */ 273960220f10SPriya Krishnan reject_pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 274072cf3143Speter dunlap reject_pdu->isp_datalen = rejected_pdu->isp_hdrlen; 274172cf3143Speter dunlap bcopy(rejected_pdu->isp_hdr, reject_pdu->isp_data, 274272cf3143Speter dunlap rejected_pdu->isp_hdrlen); 274372cf3143Speter dunlap 274472cf3143Speter dunlap reject = (iscsi_reject_rsp_hdr_t *)reject_pdu->isp_hdr; 274572cf3143Speter dunlap bzero(reject, sizeof (*reject)); 274672cf3143Speter dunlap reject->opcode = ISCSI_OP_REJECT_MSG; 274772cf3143Speter dunlap reject->reason = reason; 274872cf3143Speter dunlap reject->flags = ISCSI_FLAG_FINAL; 274972cf3143Speter dunlap hton24(reject->dlength, rejected_pdu->isp_hdrlen); 275072cf3143Speter dunlap reject->must_be_ff[0] = 0xff; 275172cf3143Speter dunlap reject->must_be_ff[1] = 0xff; 275272cf3143Speter dunlap reject->must_be_ff[2] = 0xff; 275372cf3143Speter dunlap reject->must_be_ff[3] = 0xff; 275472cf3143Speter dunlap 275572cf3143Speter dunlap iscsit_pdu_tx(reject_pdu); 275672cf3143Speter dunlap } 275772cf3143Speter dunlap 2758a6d42e7dSPeter Dunlap 2759a6d42e7dSPeter Dunlap static iscsit_task_t * 2760a6d42e7dSPeter Dunlap iscsit_task_alloc(iscsit_conn_t *ict) 2761a6d42e7dSPeter Dunlap { 2762a6d42e7dSPeter Dunlap iscsit_task_t *itask; 2763a6d42e7dSPeter Dunlap iscsit_buf_t *immed_ibuf; 2764a6d42e7dSPeter Dunlap 2765a6d42e7dSPeter Dunlap /* 2766a6d42e7dSPeter Dunlap * Possible items to pre-alloc if we cache iscsit_task_t's: 2767a6d42e7dSPeter Dunlap * 2768a6d42e7dSPeter Dunlap * Status PDU w/ sense buffer 2769a6d42e7dSPeter Dunlap * stmf_data_buf_t for immediate data 2770a6d42e7dSPeter Dunlap */ 2771a6d42e7dSPeter Dunlap itask = kmem_alloc(sizeof (iscsit_task_t) + sizeof (iscsit_buf_t) + 2772a6d42e7dSPeter Dunlap sizeof (stmf_data_buf_t), KM_NOSLEEP); 2773a6d42e7dSPeter Dunlap if (itask != NULL) { 2774a6d42e7dSPeter Dunlap mutex_init(&itask->it_mutex, NULL, MUTEX_DRIVER, NULL); 2775a6d42e7dSPeter Dunlap itask->it_aborted = itask->it_stmf_abort = 2776a6d42e7dSPeter Dunlap itask->it_tm_task = 0; 2777a6d42e7dSPeter Dunlap 2778a6d42e7dSPeter Dunlap immed_ibuf = (iscsit_buf_t *)(itask + 1); 2779a6d42e7dSPeter Dunlap bzero(immed_ibuf, sizeof (*immed_ibuf)); 2780a6d42e7dSPeter Dunlap immed_ibuf->ibuf_is_immed = B_TRUE; 2781a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf = (stmf_data_buf_t *)(immed_ibuf + 1); 2782a6d42e7dSPeter Dunlap 2783a6d42e7dSPeter Dunlap bzero(immed_ibuf->ibuf_stmf_buf, sizeof (stmf_data_buf_t)); 2784a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf->db_port_private = immed_ibuf; 2785a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf->db_sglist_length = 1; 2786a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf->db_flags = DB_DIRECTION_FROM_RPORT | 2787a6d42e7dSPeter Dunlap DB_DONT_CACHE; 2788a6d42e7dSPeter Dunlap itask->it_immed_data = immed_ibuf; 2789a6d42e7dSPeter Dunlap itask->it_idm_task = idm_task_alloc(ict->ict_ic); 2790a6d42e7dSPeter Dunlap if (itask->it_idm_task != NULL) { 2791a6d42e7dSPeter Dunlap itask->it_idm_task->idt_private = itask; 2792a6d42e7dSPeter Dunlap itask->it_ict = ict; 2793a6d42e7dSPeter Dunlap itask->it_ttt = itask->it_idm_task->idt_tt; 2794a6d42e7dSPeter Dunlap return (itask); 2795a6d42e7dSPeter Dunlap } else { 2796a6d42e7dSPeter Dunlap kmem_free(itask, sizeof (iscsit_task_t) + 2797a6d42e7dSPeter Dunlap sizeof (iscsit_buf_t) + sizeof (stmf_data_buf_t)); 2798a6d42e7dSPeter Dunlap } 2799a6d42e7dSPeter Dunlap } 2800a6d42e7dSPeter Dunlap 2801a6d42e7dSPeter Dunlap return (NULL); 2802a6d42e7dSPeter Dunlap } 2803a6d42e7dSPeter Dunlap 2804a6d42e7dSPeter Dunlap static void 2805a6d42e7dSPeter Dunlap iscsit_task_free(iscsit_task_t *itask) 2806a6d42e7dSPeter Dunlap { 2807a6d42e7dSPeter Dunlap idm_task_free(itask->it_idm_task); 2808a6d42e7dSPeter Dunlap mutex_destroy(&itask->it_mutex); 2809a6d42e7dSPeter Dunlap kmem_free(itask, sizeof (iscsit_task_t) + 2810a6d42e7dSPeter Dunlap sizeof (iscsit_buf_t) + sizeof (stmf_data_buf_t)); 2811a6d42e7dSPeter Dunlap } 2812a6d42e7dSPeter Dunlap 2813a6d42e7dSPeter Dunlap static iscsit_task_t * 2814a6d42e7dSPeter Dunlap iscsit_tm_task_alloc(iscsit_conn_t *ict) 2815a6d42e7dSPeter Dunlap { 2816a6d42e7dSPeter Dunlap iscsit_task_t *itask; 2817a6d42e7dSPeter Dunlap 2818a6d42e7dSPeter Dunlap itask = kmem_zalloc(sizeof (iscsit_task_t), KM_NOSLEEP); 2819a6d42e7dSPeter Dunlap if (itask != NULL) { 2820a6d42e7dSPeter Dunlap idm_conn_hold(ict->ict_ic); 2821a6d42e7dSPeter Dunlap mutex_init(&itask->it_mutex, NULL, MUTEX_DRIVER, NULL); 2822a6d42e7dSPeter Dunlap itask->it_aborted = itask->it_stmf_abort = 2823a6d42e7dSPeter Dunlap itask->it_tm_responded = 0; 2824a6d42e7dSPeter Dunlap itask->it_tm_pdu = NULL; 2825a6d42e7dSPeter Dunlap itask->it_tm_task = 1; 2826a6d42e7dSPeter Dunlap itask->it_ict = ict; 2827a6d42e7dSPeter Dunlap } 2828a6d42e7dSPeter Dunlap 2829a6d42e7dSPeter Dunlap return (itask); 2830a6d42e7dSPeter Dunlap } 2831a6d42e7dSPeter Dunlap 2832a6d42e7dSPeter Dunlap static void 2833a6d42e7dSPeter Dunlap iscsit_tm_task_free(iscsit_task_t *itask) 2834a6d42e7dSPeter Dunlap { 2835a6d42e7dSPeter Dunlap /* 2836a6d42e7dSPeter Dunlap * If we responded then the call to idm_pdu_complete will free the 2837a6d42e7dSPeter Dunlap * PDU. Otherwise we got aborted before the TM function could 2838a6d42e7dSPeter Dunlap * complete and we need to free the PDU explicitly. 2839a6d42e7dSPeter Dunlap */ 2840a6d42e7dSPeter Dunlap if (itask->it_tm_pdu != NULL && !itask->it_tm_responded) 2841a6d42e7dSPeter Dunlap idm_pdu_free(itask->it_tm_pdu); 2842a6d42e7dSPeter Dunlap idm_conn_rele(itask->it_ict->ict_ic); 2843a6d42e7dSPeter Dunlap mutex_destroy(&itask->it_mutex); 2844a6d42e7dSPeter Dunlap kmem_free(itask, sizeof (iscsit_task_t)); 2845a6d42e7dSPeter Dunlap } 2846a6d42e7dSPeter Dunlap 284772cf3143Speter dunlap static idm_status_t 284872cf3143Speter dunlap iscsit_task_start(iscsit_task_t *itask) 284972cf3143Speter dunlap { 285072cf3143Speter dunlap iscsit_sess_t *ist = itask->it_ict->ict_sess; 285172cf3143Speter dunlap avl_index_t where; 285272cf3143Speter dunlap 285372cf3143Speter dunlap /* 285472cf3143Speter dunlap * Sanity check the ITT and ensure that this task does not already 285572cf3143Speter dunlap * exist. If not then add the task to the session task list. 285672cf3143Speter dunlap */ 285772cf3143Speter dunlap mutex_enter(&ist->ist_mutex); 285872cf3143Speter dunlap mutex_enter(&itask->it_mutex); 285972cf3143Speter dunlap itask->it_active = 1; 286072cf3143Speter dunlap if (avl_find(&ist->ist_task_list, itask, &where) == NULL) { 286172cf3143Speter dunlap /* New task, add to AVL */ 286272cf3143Speter dunlap avl_insert(&ist->ist_task_list, itask, where); 286372cf3143Speter dunlap mutex_exit(&itask->it_mutex); 286472cf3143Speter dunlap mutex_exit(&ist->ist_mutex); 286572cf3143Speter dunlap return (IDM_STATUS_SUCCESS); 286672cf3143Speter dunlap } 286772cf3143Speter dunlap mutex_exit(&itask->it_mutex); 286872cf3143Speter dunlap mutex_exit(&ist->ist_mutex); 286972cf3143Speter dunlap 287072cf3143Speter dunlap return (IDM_STATUS_REJECT); 287172cf3143Speter dunlap } 287272cf3143Speter dunlap 287372cf3143Speter dunlap static void 287472cf3143Speter dunlap iscsit_task_done(iscsit_task_t *itask) 287572cf3143Speter dunlap { 287672cf3143Speter dunlap iscsit_sess_t *ist = itask->it_ict->ict_sess; 287772cf3143Speter dunlap 287872cf3143Speter dunlap mutex_enter(&ist->ist_mutex); 287972cf3143Speter dunlap mutex_enter(&itask->it_mutex); 288072cf3143Speter dunlap if (itask->it_active) { 288172cf3143Speter dunlap avl_remove(&ist->ist_task_list, itask); 288272cf3143Speter dunlap itask->it_active = 0; 288372cf3143Speter dunlap } 288472cf3143Speter dunlap mutex_exit(&itask->it_mutex); 288572cf3143Speter dunlap mutex_exit(&ist->ist_mutex); 288672cf3143Speter dunlap } 288772cf3143Speter dunlap 2888a6d42e7dSPeter Dunlap /* 2889a6d42e7dSPeter Dunlap * iscsit status PDU cache 2890a6d42e7dSPeter Dunlap */ 2891a6d42e7dSPeter Dunlap 2892a6d42e7dSPeter Dunlap /*ARGSUSED*/ 2893a6d42e7dSPeter Dunlap static int 2894a6d42e7dSPeter Dunlap iscsit_status_pdu_constructor(void *pdu_void, void *arg, int flags) 2895a6d42e7dSPeter Dunlap { 2896a6d42e7dSPeter Dunlap idm_pdu_t *pdu = pdu_void; 2897a6d42e7dSPeter Dunlap iscsi_scsi_rsp_hdr_t *rsp; 2898a6d42e7dSPeter Dunlap 2899a6d42e7dSPeter Dunlap bzero(pdu, sizeof (idm_pdu_t)); 2900a6d42e7dSPeter Dunlap pdu->isp_callback = iscsit_send_good_status_done; 2901a6d42e7dSPeter Dunlap pdu->isp_magic = IDM_PDU_MAGIC; 2902a6d42e7dSPeter Dunlap pdu->isp_hdr = (iscsi_hdr_t *)(pdu + 1); /* Ptr arithmetic */ 2903a6d42e7dSPeter Dunlap pdu->isp_hdrlen = sizeof (iscsi_hdr_t); 2904a6d42e7dSPeter Dunlap 2905a6d42e7dSPeter Dunlap /* Setup status response */ 2906a6d42e7dSPeter Dunlap rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 2907a6d42e7dSPeter Dunlap bzero(rsp, sizeof (*rsp)); 2908a6d42e7dSPeter Dunlap rsp->opcode = ISCSI_OP_SCSI_RSP; 2909a6d42e7dSPeter Dunlap rsp->flags = ISCSI_FLAG_FINAL; 2910a6d42e7dSPeter Dunlap rsp->response = ISCSI_STATUS_CMD_COMPLETED; 2911a6d42e7dSPeter Dunlap 2912a6d42e7dSPeter Dunlap return (0); 2913a6d42e7dSPeter Dunlap } 2914a6d42e7dSPeter Dunlap 2915a6d42e7dSPeter Dunlap /* 2916a6d42e7dSPeter Dunlap * iscsit private data handler 2917a6d42e7dSPeter Dunlap */ 2918a6d42e7dSPeter Dunlap 2919a6d42e7dSPeter Dunlap /*ARGSUSED*/ 2920a6d42e7dSPeter Dunlap static void 2921a6d42e7dSPeter Dunlap iscsit_pp_cb(struct stmf_port_provider *pp, int cmd, void *arg, uint32_t flags) 2922a6d42e7dSPeter Dunlap { 2923a6d42e7dSPeter Dunlap it_config_t *cfg; 2924a6d42e7dSPeter Dunlap nvlist_t *nvl; 29258c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_service_enabled_t old_state; 2926a6d42e7dSPeter Dunlap 2927a6d42e7dSPeter Dunlap if ((cmd != STMF_PROVIDER_DATA_UPDATED) || (arg == NULL)) { 2928a6d42e7dSPeter Dunlap return; 2929a6d42e7dSPeter Dunlap } 2930a6d42e7dSPeter Dunlap 2931a6d42e7dSPeter Dunlap nvl = (nvlist_t *)arg; 2932a6d42e7dSPeter Dunlap 2933a6d42e7dSPeter Dunlap /* Translate nvlist */ 2934a6d42e7dSPeter Dunlap if (it_nv_to_config(nvl, &cfg) != 0) { 2935a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "Configuration is invalid"); 2936a6d42e7dSPeter Dunlap return; 2937a6d42e7dSPeter Dunlap } 2938a6d42e7dSPeter Dunlap 29398c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* Check that no iSCSI ioctl is currently running */ 29408c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 29418c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States old_state = iscsit_global.global_svc_state; 29428c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States switch (iscsit_global.global_svc_state) { 29438c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_ENABLED: 29448c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_DISABLED: 29458c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state = ISE_BUSY; 29468c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States break; 29478c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_ENABLING: 29488c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* 29498c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * It is OK for the iscsit_pp_cb to be called from inside of 29508c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * an iSCSI ioctl only if we are currently executing inside 29518c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * of stmf_register_port_provider. 29528c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States */ 29538c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT((flags & STMF_PCB_PREG_COMPLETE) != 0); 29548c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States break; 29558c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States default: 29568c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States cmn_err(CE_WARN, "iscsit_pp_cb called when global_svc_state" 29578c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States " is not ENABLED(0x%x) -- ignoring", 29588c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state); 29598c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 29608c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States it_config_free_cmn(cfg); 29618c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States return; 29628c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States } 29638c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 29648c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 2965a6d42e7dSPeter Dunlap /* Update config */ 2966a6d42e7dSPeter Dunlap (void) iscsit_config_merge(cfg); 2967a6d42e7dSPeter Dunlap 2968a6d42e7dSPeter Dunlap it_config_free_cmn(cfg); 29698c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 29708c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* Restore old iSCSI driver global state */ 29718c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 29728c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT(iscsit_global.global_svc_state == ISE_BUSY || 29738c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state == ISE_ENABLING); 29748c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state = old_state; 29758c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 2976a6d42e7dSPeter Dunlap } 2977a6d42e7dSPeter Dunlap 2978a6d42e7dSPeter Dunlap 2979a6d42e7dSPeter Dunlap static it_cfg_status_t 2980a6d42e7dSPeter Dunlap iscsit_config_merge(it_config_t *in_cfg) 2981a6d42e7dSPeter Dunlap { 2982a6d42e7dSPeter Dunlap it_cfg_status_t status; 2983a6d42e7dSPeter Dunlap it_config_t *cfg; 2984a6d42e7dSPeter Dunlap it_config_t tmp_cfg; 2985a6d42e7dSPeter Dunlap list_t tpg_del_list; 2986a6d42e7dSPeter Dunlap 2987a6d42e7dSPeter Dunlap if (in_cfg) { 2988a6d42e7dSPeter Dunlap cfg = in_cfg; 2989a6d42e7dSPeter Dunlap } else { 2990a6d42e7dSPeter Dunlap /* Make empty config */ 2991a6d42e7dSPeter Dunlap bzero(&tmp_cfg, sizeof (tmp_cfg)); 2992a6d42e7dSPeter Dunlap cfg = &tmp_cfg; 2993a6d42e7dSPeter Dunlap } 2994a6d42e7dSPeter Dunlap 2995a6d42e7dSPeter Dunlap list_create(&tpg_del_list, sizeof (iscsit_tpg_t), 2996a6d42e7dSPeter Dunlap offsetof(iscsit_tpg_t, tpg_delete_ln)); 2997a6d42e7dSPeter Dunlap 2998a6d42e7dSPeter Dunlap /* 2999a6d42e7dSPeter Dunlap * Update targets, initiator contexts, target portal groups, 3000a6d42e7dSPeter Dunlap * and iSNS client 3001a6d42e7dSPeter Dunlap */ 3002a6d42e7dSPeter Dunlap ISCSIT_GLOBAL_LOCK(RW_WRITER); 3003a6d42e7dSPeter Dunlap if (((status = iscsit_config_merge_tpg(cfg, &tpg_del_list)) 3004a6d42e7dSPeter Dunlap != 0) || 3005a6d42e7dSPeter Dunlap ((status = iscsit_config_merge_tgt(cfg)) != 0) || 3006a6d42e7dSPeter Dunlap ((status = iscsit_config_merge_ini(cfg)) != 0) || 3007a6d42e7dSPeter Dunlap ((status = isnst_config_merge(cfg)) != 0)) { 3008a6d42e7dSPeter Dunlap ISCSIT_GLOBAL_UNLOCK(); 3009a6d42e7dSPeter Dunlap return (status); 3010a6d42e7dSPeter Dunlap } 3011a6d42e7dSPeter Dunlap 3012a6d42e7dSPeter Dunlap /* Update other global config parameters */ 3013a6d42e7dSPeter Dunlap if (iscsit_global.global_props) { 3014a6d42e7dSPeter Dunlap nvlist_free(iscsit_global.global_props); 3015a6d42e7dSPeter Dunlap iscsit_global.global_props = NULL; 3016a6d42e7dSPeter Dunlap } 3017a6d42e7dSPeter Dunlap if (in_cfg) { 3018a6d42e7dSPeter Dunlap (void) nvlist_dup(cfg->config_global_properties, 3019a6d42e7dSPeter Dunlap &iscsit_global.global_props, KM_SLEEP); 3020a6d42e7dSPeter Dunlap } 3021a6d42e7dSPeter Dunlap ISCSIT_GLOBAL_UNLOCK(); 3022a6d42e7dSPeter Dunlap 3023a6d42e7dSPeter Dunlap iscsit_config_destroy_tpgs(&tpg_del_list); 3024a6d42e7dSPeter Dunlap 3025a6d42e7dSPeter Dunlap list_destroy(&tpg_del_list); 3026a6d42e7dSPeter Dunlap 3027a6d42e7dSPeter Dunlap return (ITCFG_SUCCESS); 3028a6d42e7dSPeter Dunlap } 3029a6d42e7dSPeter Dunlap 3030a6d42e7dSPeter Dunlap /* 3031a6d42e7dSPeter Dunlap * iscsit_sna_lt[e] 3032a6d42e7dSPeter Dunlap * 3033a6d42e7dSPeter Dunlap * Compare serial numbers using serial number arithmetic as defined in 3034a6d42e7dSPeter Dunlap * RFC 1982. 3035a6d42e7dSPeter Dunlap * 3036ab003da8SJim Dunham * NOTE: This code is duplicated in the isns server. It ought to be common. 3037a6d42e7dSPeter Dunlap */ 3038a6d42e7dSPeter Dunlap 3039a6d42e7dSPeter Dunlap static int 3040a6d42e7dSPeter Dunlap iscsit_sna_lt(uint32_t sn1, uint32_t sn2) 3041a6d42e7dSPeter Dunlap { 3042a6d42e7dSPeter Dunlap return ((sn1 != sn2) && 3043a6d42e7dSPeter Dunlap (((sn1 < sn2) && ((sn2 - sn1) < ISCSIT_SNA32_CHECK)) || 3044a6d42e7dSPeter Dunlap ((sn1 > sn2) && ((sn1 - sn2) > ISCSIT_SNA32_CHECK)))); 3045a6d42e7dSPeter Dunlap } 3046a6d42e7dSPeter Dunlap 3047a6d42e7dSPeter Dunlap static int 3048a6d42e7dSPeter Dunlap iscsit_sna_lte(uint32_t sn1, uint32_t sn2) 3049a6d42e7dSPeter Dunlap { 3050a6d42e7dSPeter Dunlap return ((sn1 == sn2) || 3051a6d42e7dSPeter Dunlap (((sn1 < sn2) && ((sn2 - sn1) < ISCSIT_SNA32_CHECK)) || 3052a6d42e7dSPeter Dunlap ((sn1 > sn2) && ((sn1 - sn2) > ISCSIT_SNA32_CHECK)))); 3053a6d42e7dSPeter Dunlap } 3054a6d42e7dSPeter Dunlap 3055a6d42e7dSPeter Dunlap 3056a6d42e7dSPeter Dunlap static boolean_t 3057a6d42e7dSPeter Dunlap iscsit_cmdsn_in_window(iscsit_conn_t *ict, uint32_t cmdsn) 3058a6d42e7dSPeter Dunlap { 3059a6d42e7dSPeter Dunlap iscsit_sess_t *ist = ict->ict_sess; 3060a6d42e7dSPeter Dunlap int rval = B_TRUE; 3061a6d42e7dSPeter Dunlap 3062a6d42e7dSPeter Dunlap ist = ict->ict_sess; 3063a6d42e7dSPeter Dunlap 3064d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3065a6d42e7dSPeter Dunlap 3066a6d42e7dSPeter Dunlap /* 3067a6d42e7dSPeter Dunlap * If cmdsn is less than ist_expcmdsn - iscsit_cmd_window() or 3068a6d42e7dSPeter Dunlap * greater than ist_expcmdsn, it's not in the window. 3069a6d42e7dSPeter Dunlap */ 3070a6d42e7dSPeter Dunlap 3071a6d42e7dSPeter Dunlap if (iscsit_sna_lt(cmdsn, (ist->ist_expcmdsn - iscsit_cmd_window())) || 3072a6d42e7dSPeter Dunlap !iscsit_sna_lte(cmdsn, ist->ist_expcmdsn)) { 3073a6d42e7dSPeter Dunlap rval = B_FALSE; 3074a6d42e7dSPeter Dunlap } 3075a6d42e7dSPeter Dunlap 3076d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3077a6d42e7dSPeter Dunlap 3078a6d42e7dSPeter Dunlap return (rval); 3079a6d42e7dSPeter Dunlap } 3080d618d68dSPriya Krishnan 3081d618d68dSPriya Krishnan /* 3082d618d68dSPriya Krishnan * iscsit_check_cmdsn_and_queue 3083d618d68dSPriya Krishnan * 3084d618d68dSPriya Krishnan * Independent of the order in which the iSCSI target receives non-immediate 3085d618d68dSPriya Krishnan * command PDU across the entire session and any multiple connections within 3086d618d68dSPriya Krishnan * the session, the target must deliver the commands to the SCSI layer in 3087d618d68dSPriya Krishnan * CmdSN order. So out-of-order non-immediate commands are queued up on a 3088d618d68dSPriya Krishnan * session-wide wait queue. Duplicate commands are ignored. 3089d618d68dSPriya Krishnan * 3090d618d68dSPriya Krishnan */ 3091d618d68dSPriya Krishnan static int 3092d618d68dSPriya Krishnan iscsit_check_cmdsn_and_queue(idm_pdu_t *rx_pdu) 3093d618d68dSPriya Krishnan { 3094d618d68dSPriya Krishnan idm_conn_t *ic = rx_pdu->isp_ic; 3095d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 3096d618d68dSPriya Krishnan iscsit_sess_t *ist = ict->ict_sess; 3097d618d68dSPriya Krishnan iscsi_scsi_cmd_hdr_t *hdr = (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 3098d618d68dSPriya Krishnan 3099d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3100d618d68dSPriya Krishnan if (hdr->opcode & ISCSI_OP_IMMEDIATE) { 3101d618d68dSPriya Krishnan /* do not queue, handle it immediately */ 3102d618d68dSPriya Krishnan DTRACE_PROBE2(immediate__cmd, iscsit_sess_t *, ist, 3103d618d68dSPriya Krishnan idm_pdu_t *, rx_pdu); 3104d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3105d618d68dSPriya Krishnan return (ISCSIT_CMDSN_EQ_EXPCMDSN); 3106d618d68dSPriya Krishnan } 3107d618d68dSPriya Krishnan if (iscsit_sna_lt(ist->ist_expcmdsn, ntohl(hdr->cmdsn))) { 3108d618d68dSPriya Krishnan /* 3109d618d68dSPriya Krishnan * Out-of-order commands (cmdSN higher than ExpCmdSN) 3110d618d68dSPriya Krishnan * are staged on a fixed-size circular buffer until 3111d618d68dSPriya Krishnan * the missing command is delivered to the SCSI layer. 3112d618d68dSPriya Krishnan * Irrespective of the order of insertion into the 3113d618d68dSPriya Krishnan * staging queue, the commands are processed out of the 3114d618d68dSPriya Krishnan * queue in cmdSN order only. 3115d618d68dSPriya Krishnan */ 3116d618d68dSPriya Krishnan rx_pdu->isp_queue_time = ddi_get_time(); 3117d618d68dSPriya Krishnan iscsit_add_pdu_to_queue(ist, rx_pdu); 3118d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3119d618d68dSPriya Krishnan return (ISCSIT_CMDSN_GT_EXPCMDSN); 3120d618d68dSPriya Krishnan } else if (iscsit_sna_lt(ntohl(hdr->cmdsn), ist->ist_expcmdsn)) { 3121d618d68dSPriya Krishnan DTRACE_PROBE3(cmdsn__lt__expcmdsn, iscsit_sess_t *, ist, 3122d618d68dSPriya Krishnan iscsit_conn_t *, ict, idm_pdu_t *, rx_pdu); 3123d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3124d618d68dSPriya Krishnan return (ISCSIT_CMDSN_LT_EXPCMDSN); 3125d618d68dSPriya Krishnan } else { 3126d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3127d618d68dSPriya Krishnan return (ISCSIT_CMDSN_EQ_EXPCMDSN); 3128d618d68dSPriya Krishnan } 3129d618d68dSPriya Krishnan } 3130d618d68dSPriya Krishnan 3131d618d68dSPriya Krishnan /* 3132d618d68dSPriya Krishnan * iscsit_add_pdu_to_queue() adds PDUs into the array indexed by 3133d618d68dSPriya Krishnan * their cmdsn value. The length of the array is kept above the 3134d618d68dSPriya Krishnan * maximum window size. The window keeps the cmdsn within a range 3135d618d68dSPriya Krishnan * such that there are no collisons. e.g. the assumption is that 3136d618d68dSPriya Krishnan * the windowing checks make it impossible to receive PDUs that 3137d618d68dSPriya Krishnan * index into the same location in the array. 3138d618d68dSPriya Krishnan */ 3139d618d68dSPriya Krishnan static void 3140d618d68dSPriya Krishnan iscsit_add_pdu_to_queue(iscsit_sess_t *ist, idm_pdu_t *rx_pdu) 3141d618d68dSPriya Krishnan { 3142d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3143d618d68dSPriya Krishnan iscsit_conn_t *ict = rx_pdu->isp_ic->ic_handle; 3144d618d68dSPriya Krishnan uint32_t cmdsn = 3145d618d68dSPriya Krishnan ((iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr)->cmdsn; 3146d618d68dSPriya Krishnan uint32_t index; 3147d618d68dSPriya Krishnan 3148d618d68dSPriya Krishnan ASSERT(MUTEX_HELD(&ist->ist_sn_mutex)); 3149d618d68dSPriya Krishnan /* 3150d618d68dSPriya Krishnan * If the connection is being torn down, then 3151d618d68dSPriya Krishnan * don't add the PDU to the staging queue 3152d618d68dSPriya Krishnan */ 3153d618d68dSPriya Krishnan mutex_enter(&ict->ict_mutex); 3154d618d68dSPriya Krishnan if (ict->ict_lost) { 3155d618d68dSPriya Krishnan mutex_exit(&ict->ict_mutex); 3156d618d68dSPriya Krishnan idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 3157d618d68dSPriya Krishnan return; 3158d618d68dSPriya Krishnan } 3159d618d68dSPriya Krishnan iscsit_conn_dispatch_hold(ict); 3160d618d68dSPriya Krishnan mutex_exit(&ict->ict_mutex); 3161d618d68dSPriya Krishnan 3162d618d68dSPriya Krishnan index = ntohl(cmdsn) % ISCSIT_RXPDU_QUEUE_LEN; 3163*3e2514dcSDan McDonald /* 3164*3e2514dcSDan McDonald * In the normal case, assuming that the Initiator is not 3165*3e2514dcSDan McDonald * buggy and that we don't have packet duplication occuring, 3166*3e2514dcSDan McDonald * the entry in the array will be NULL. However, we may have 3167*3e2514dcSDan McDonald * received a duplicate PDU with cmdsn > expsn , and in that 3168*3e2514dcSDan McDonald * case we just ignore this PDU -- the previously received one 3169*3e2514dcSDan McDonald * remains queued for processing. We need to be careful not 3170*3e2514dcSDan McDonald * to leak this one however. 3171*3e2514dcSDan McDonald */ 3172*3e2514dcSDan McDonald if (cbuf->cb_buffer[index] != NULL) { 3173*3e2514dcSDan McDonald idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 3174*3e2514dcSDan McDonald } else { 3175*3e2514dcSDan McDonald cbuf->cb_buffer[index] = rx_pdu; 3176*3e2514dcSDan McDonald cbuf->cb_num_elems++; 3177*3e2514dcSDan McDonald } 3178d618d68dSPriya Krishnan } 3179d618d68dSPriya Krishnan 3180d618d68dSPriya Krishnan static idm_pdu_t * 3181d618d68dSPriya Krishnan iscsit_remove_pdu_from_queue(iscsit_sess_t *ist, uint32_t cmdsn) 3182d618d68dSPriya Krishnan { 3183d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3184d618d68dSPriya Krishnan idm_pdu_t *pdu = NULL; 3185d618d68dSPriya Krishnan uint32_t index; 3186d618d68dSPriya Krishnan 3187d618d68dSPriya Krishnan ASSERT(MUTEX_HELD(&ist->ist_sn_mutex)); 3188d618d68dSPriya Krishnan index = cmdsn % ISCSIT_RXPDU_QUEUE_LEN; 3189d618d68dSPriya Krishnan if ((pdu = cbuf->cb_buffer[index]) != NULL) { 3190d618d68dSPriya Krishnan ASSERT(cmdsn == 3191d618d68dSPriya Krishnan ntohl(((iscsi_scsi_cmd_hdr_t *)pdu->isp_hdr)->cmdsn)); 3192d618d68dSPriya Krishnan cbuf->cb_buffer[index] = NULL; 3193d618d68dSPriya Krishnan cbuf->cb_num_elems--; 3194d618d68dSPriya Krishnan return (pdu); 3195d618d68dSPriya Krishnan } 3196d618d68dSPriya Krishnan return (NULL); 3197d618d68dSPriya Krishnan } 3198d618d68dSPriya Krishnan 3199d618d68dSPriya Krishnan /* 3200d618d68dSPriya Krishnan * iscsit_process_pdu_in_queue() finds the next pdu in sequence 3201d618d68dSPriya Krishnan * and posts it to the SCSI layer 3202d618d68dSPriya Krishnan */ 3203d618d68dSPriya Krishnan static void 3204d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(iscsit_sess_t *ist) 3205d618d68dSPriya Krishnan { 3206d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3207d618d68dSPriya Krishnan idm_pdu_t *pdu = NULL; 3208d618d68dSPriya Krishnan uint32_t expcmdsn; 3209d618d68dSPriya Krishnan 3210d618d68dSPriya Krishnan for (;;) { 3211d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3212d618d68dSPriya Krishnan if (cbuf->cb_num_elems == 0) { 3213d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3214d618d68dSPriya Krishnan break; 3215d618d68dSPriya Krishnan } 3216d618d68dSPriya Krishnan expcmdsn = ist->ist_expcmdsn; 3217d618d68dSPriya Krishnan if ((pdu = iscsit_remove_pdu_from_queue(ist, expcmdsn)) 3218d618d68dSPriya Krishnan == NULL) { 3219d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3220d618d68dSPriya Krishnan break; 3221d618d68dSPriya Krishnan } 3222d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3223d618d68dSPriya Krishnan iscsit_post_staged_pdu(pdu); 3224d618d68dSPriya Krishnan } 3225d618d68dSPriya Krishnan } 3226d618d68dSPriya Krishnan 3227d618d68dSPriya Krishnan static void 3228d618d68dSPriya Krishnan iscsit_post_staged_pdu(idm_pdu_t *rx_pdu) 3229d618d68dSPriya Krishnan { 3230d618d68dSPriya Krishnan iscsit_conn_t *ict = rx_pdu->isp_ic->ic_handle; 3231d618d68dSPriya Krishnan 3232d618d68dSPriya Krishnan /* Post the PDU to the SCSI layer */ 3233d618d68dSPriya Krishnan switch (IDM_PDU_OPCODE(rx_pdu)) { 3234d618d68dSPriya Krishnan case ISCSI_OP_NOOP_OUT: 3235d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3236d618d68dSPriya Krishnan iscsit_pdu_op_noop(ict, rx_pdu); 3237d618d68dSPriya Krishnan break; 3238d618d68dSPriya Krishnan case ISCSI_OP_TEXT_CMD: 3239d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3240d618d68dSPriya Krishnan iscsit_pdu_op_text_cmd(ict, rx_pdu); 3241d618d68dSPriya Krishnan break; 3242d618d68dSPriya Krishnan case ISCSI_OP_SCSI_TASK_MGT_MSG: 3243d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3244d618d68dSPriya Krishnan iscsit_op_scsi_task_mgmt(ict, rx_pdu); 3245d618d68dSPriya Krishnan break; 3246d618d68dSPriya Krishnan case ISCSI_OP_SCSI_CMD: 3247d618d68dSPriya Krishnan /* cmdSN will be incremented after creating itask */ 3248d618d68dSPriya Krishnan iscsit_post_scsi_cmd(rx_pdu->isp_ic, rx_pdu); 3249d618d68dSPriya Krishnan break; 3250d618d68dSPriya Krishnan case ISCSI_OP_LOGOUT_CMD: 3251d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3252d618d68dSPriya Krishnan iscsit_pdu_op_logout_cmd(ict, rx_pdu); 3253d618d68dSPriya Krishnan break; 3254d618d68dSPriya Krishnan default: 3255d618d68dSPriya Krishnan /* No other PDUs should be placed on the queue */ 3256d618d68dSPriya Krishnan ASSERT(0); 3257d618d68dSPriya Krishnan } 3258d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); /* release hold on the conn */ 3259d618d68dSPriya Krishnan } 3260d618d68dSPriya Krishnan 3261d618d68dSPriya Krishnan /* ARGSUSED */ 3262d618d68dSPriya Krishnan void 3263d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_start(void) 3264d618d68dSPriya Krishnan { 3265d618d68dSPriya Krishnan mutex_enter(&iscsit_rxpdu_queue_monitor_mutex); 3266d618d68dSPriya Krishnan if (iscsit_rxpdu_queue_monitor_thr_running) { 3267d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3268d618d68dSPriya Krishnan return; 3269d618d68dSPriya Krishnan } 3270d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_id = 3271d618d68dSPriya Krishnan thread_create(NULL, 0, iscsit_rxpdu_queue_monitor, NULL, 3272d618d68dSPriya Krishnan 0, &p0, TS_RUN, minclsyspri); 3273d618d68dSPriya Krishnan while (!iscsit_rxpdu_queue_monitor_thr_running) { 3274d618d68dSPriya Krishnan cv_wait(&iscsit_rxpdu_queue_monitor_cv, 3275d618d68dSPriya Krishnan &iscsit_rxpdu_queue_monitor_mutex); 3276d618d68dSPriya Krishnan } 3277d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3278d618d68dSPriya Krishnan 3279d618d68dSPriya Krishnan } 3280d618d68dSPriya Krishnan 3281d618d68dSPriya Krishnan /* ARGSUSED */ 3282d618d68dSPriya Krishnan void 3283d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_stop(void) 3284d618d68dSPriya Krishnan { 3285d618d68dSPriya Krishnan mutex_enter(&iscsit_rxpdu_queue_monitor_mutex); 3286d618d68dSPriya Krishnan if (iscsit_rxpdu_queue_monitor_thr_running) { 3287d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_running = B_FALSE; 3288d618d68dSPriya Krishnan cv_signal(&iscsit_rxpdu_queue_monitor_cv); 3289d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3290d618d68dSPriya Krishnan 3291d618d68dSPriya Krishnan thread_join(iscsit_rxpdu_queue_monitor_thr_did); 3292d618d68dSPriya Krishnan return; 3293d618d68dSPriya Krishnan } 3294d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3295d618d68dSPriya Krishnan } 3296d618d68dSPriya Krishnan 3297d618d68dSPriya Krishnan /* 3298d618d68dSPriya Krishnan * A separate thread is used to scan the staging queue on all the 3299d618d68dSPriya Krishnan * sessions, If a delayed PDU does not arrive within a timeout, the 3300d618d68dSPriya Krishnan * target will advance to the staged PDU that is next in sequence 3301d618d68dSPriya Krishnan * and exceeded the threshold wait time. It is up to the initiator 3302d618d68dSPriya Krishnan * to note that the target has not acknowledged a particular cmdsn 3303d618d68dSPriya Krishnan * and take appropriate action. 3304d618d68dSPriya Krishnan */ 3305d618d68dSPriya Krishnan /* ARGSUSED */ 3306d618d68dSPriya Krishnan static void 3307d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor(void *arg) 3308d618d68dSPriya Krishnan { 3309d618d68dSPriya Krishnan iscsit_tgt_t *tgt; 3310d618d68dSPriya Krishnan iscsit_sess_t *ist; 3311d618d68dSPriya Krishnan 3312d618d68dSPriya Krishnan mutex_enter(&iscsit_rxpdu_queue_monitor_mutex); 3313d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_did = curthread->t_did; 3314d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_running = B_TRUE; 3315d618d68dSPriya Krishnan cv_signal(&iscsit_rxpdu_queue_monitor_cv); 3316d618d68dSPriya Krishnan 3317d618d68dSPriya Krishnan while (iscsit_rxpdu_queue_monitor_thr_running) { 3318d618d68dSPriya Krishnan ISCSIT_GLOBAL_LOCK(RW_READER); 3319d618d68dSPriya Krishnan for (tgt = avl_first(&iscsit_global.global_target_list); 3320d618d68dSPriya Krishnan tgt != NULL; 3321d618d68dSPriya Krishnan tgt = AVL_NEXT(&iscsit_global.global_target_list, tgt)) { 3322d618d68dSPriya Krishnan mutex_enter(&tgt->target_mutex); 3323d618d68dSPriya Krishnan for (ist = avl_first(&tgt->target_sess_list); 3324d618d68dSPriya Krishnan ist != NULL; 3325d618d68dSPriya Krishnan ist = AVL_NEXT(&tgt->target_sess_list, ist)) { 3326d618d68dSPriya Krishnan 3327d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_session(ist); 3328d618d68dSPriya Krishnan } 3329d618d68dSPriya Krishnan mutex_exit(&tgt->target_mutex); 3330d618d68dSPriya Krishnan } 3331d618d68dSPriya Krishnan ISCSIT_GLOBAL_UNLOCK(); 3332d618d68dSPriya Krishnan if (iscsit_rxpdu_queue_monitor_thr_running == B_FALSE) { 3333d618d68dSPriya Krishnan break; 3334d618d68dSPriya Krishnan } 3335d618d68dSPriya Krishnan (void) cv_reltimedwait(&iscsit_rxpdu_queue_monitor_cv, 3336d618d68dSPriya Krishnan &iscsit_rxpdu_queue_monitor_mutex, 3337d618d68dSPriya Krishnan ISCSIT_RXPDU_QUEUE_MONITOR_INTERVAL * drv_usectohz(1000000), 3338d618d68dSPriya Krishnan TR_CLOCK_TICK); 3339d618d68dSPriya Krishnan } 3340d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3341d618d68dSPriya Krishnan thread_exit(); 3342d618d68dSPriya Krishnan } 3343d618d68dSPriya Krishnan 3344d618d68dSPriya Krishnan static void 3345d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_session(iscsit_sess_t *ist) 3346d618d68dSPriya Krishnan { 3347d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3348d618d68dSPriya Krishnan idm_pdu_t *next_pdu = NULL; 3349d618d68dSPriya Krishnan uint32_t index, next_cmdsn, i; 3350d618d68dSPriya Krishnan 3351d618d68dSPriya Krishnan /* 3352d618d68dSPriya Krishnan * Assume that all PDUs in the staging queue have a cmdsn >= expcmdsn. 3353d618d68dSPriya Krishnan * Starting with the expcmdsn, iterate over the staged PDUs to find 3354d618d68dSPriya Krishnan * the next PDU with a wait time greater than the threshold. If found 3355d618d68dSPriya Krishnan * advance the staged PDU to the SCSI layer, skipping over the missing 3356d618d68dSPriya Krishnan * PDU(s) to get past the hole in the command sequence. It is up to 3357d618d68dSPriya Krishnan * the initiator to note that the target has not acknowledged a cmdsn 3358d618d68dSPriya Krishnan * and take appropriate action. 3359d618d68dSPriya Krishnan * 3360d618d68dSPriya Krishnan * Since the PDU(s) arrive in any random order, it is possible that 3361d618d68dSPriya Krishnan * that the actual wait time for a particular PDU is much longer than 3362d618d68dSPriya Krishnan * the defined threshold. e.g. Consider a case where commands are sent 3363d618d68dSPriya Krishnan * over 4 different connections, and cmdsn = 1004 arrives first, then 3364d618d68dSPriya Krishnan * 1003, and 1002 and 1001 are lost due to a connection failure. 3365d618d68dSPriya Krishnan * So now 1003 is waiting for 1002 to be delivered, and although the 3366d618d68dSPriya Krishnan * wait time of 1004 > wait time of 1003, only 1003 will be considered 3367d618d68dSPriya Krishnan * by the monitor thread. 1004 will be automatically processed by 3368d618d68dSPriya Krishnan * iscsit_process_pdu_in_queue() once the scan is complete and the 3369d618d68dSPriya Krishnan * expcmdsn becomes current. 3370d618d68dSPriya Krishnan */ 3371d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3372d618d68dSPriya Krishnan cbuf = ist->ist_rxpdu_queue; 3373d618d68dSPriya Krishnan if (cbuf->cb_num_elems == 0) { 3374d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3375d618d68dSPriya Krishnan return; 3376d618d68dSPriya Krishnan } 3377d618d68dSPriya Krishnan for (next_pdu = NULL, i = 0; ; i++) { 3378d618d68dSPriya Krishnan next_cmdsn = ist->ist_expcmdsn + i; /* start at expcmdsn */ 3379d618d68dSPriya Krishnan index = next_cmdsn % ISCSIT_RXPDU_QUEUE_LEN; 3380d618d68dSPriya Krishnan if ((next_pdu = cbuf->cb_buffer[index]) != NULL) { 3381d618d68dSPriya Krishnan /* 3382d618d68dSPriya Krishnan * If the PDU wait time has not exceeded threshold 3383d618d68dSPriya Krishnan * stop scanning the staging queue until the timer 3384d618d68dSPriya Krishnan * fires again 3385d618d68dSPriya Krishnan */ 3386d618d68dSPriya Krishnan if ((ddi_get_time() - next_pdu->isp_queue_time) 3387d618d68dSPriya Krishnan < rxpdu_queue_threshold) { 3388d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3389d618d68dSPriya Krishnan return; 3390d618d68dSPriya Krishnan } 3391d618d68dSPriya Krishnan /* 3392d618d68dSPriya Krishnan * Remove the next PDU from the queue and post it 3393d618d68dSPriya Krishnan * to the SCSI layer, skipping over the missing 3394d618d68dSPriya Krishnan * PDU. Stop scanning the staging queue until 3395d618d68dSPriya Krishnan * the monitor timer fires again 3396d618d68dSPriya Krishnan */ 3397d618d68dSPriya Krishnan (void) iscsit_remove_pdu_from_queue(ist, next_cmdsn); 3398d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3399d618d68dSPriya Krishnan DTRACE_PROBE3(advanced__to__blocked__cmdsn, 3400d618d68dSPriya Krishnan iscsit_sess_t *, ist, idm_pdu_t *, next_pdu, 3401d618d68dSPriya Krishnan uint32_t, next_cmdsn); 3402d618d68dSPriya Krishnan iscsit_post_staged_pdu(next_pdu); 3403d618d68dSPriya Krishnan /* Deliver any subsequent PDUs immediately */ 3404d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(ist); 3405d618d68dSPriya Krishnan return; 3406d618d68dSPriya Krishnan } 3407d618d68dSPriya Krishnan /* 3408d618d68dSPriya Krishnan * Skipping over i PDUs, e.g. a case where commands 1001 and 3409d618d68dSPriya Krishnan * 1002 are lost in the network, skip over both and post 1003 3410d618d68dSPriya Krishnan * expcmdsn then becomes 1004 at the end of the scan. 3411d618d68dSPriya Krishnan */ 3412d618d68dSPriya Krishnan DTRACE_PROBE2(skipping__over__cmdsn, iscsit_sess_t *, ist, 3413d618d68dSPriya Krishnan uint32_t, next_cmdsn); 3414d618d68dSPriya Krishnan } 3415d618d68dSPriya Krishnan /* 3416d618d68dSPriya Krishnan * following the assumption, staged cmdsn >= expcmdsn, this statement 3417d618d68dSPriya Krishnan * is never reached. 3418d618d68dSPriya Krishnan */ 3419d618d68dSPriya Krishnan } 3420