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 /* 22*d618d68dSPriya Krishnan * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. 23a6d42e7dSPeter Dunlap */ 24a6d42e7dSPeter Dunlap 25a6d42e7dSPeter Dunlap #include <sys/cpuvar.h> 26a6d42e7dSPeter Dunlap #include <sys/types.h> 27a6d42e7dSPeter Dunlap #include <sys/conf.h> 28a6d42e7dSPeter Dunlap #include <sys/stat.h> 29a6d42e7dSPeter Dunlap #include <sys/file.h> 30a6d42e7dSPeter Dunlap #include <sys/ddi.h> 31a6d42e7dSPeter Dunlap #include <sys/sunddi.h> 32a6d42e7dSPeter Dunlap #include <sys/modctl.h> 33a6d42e7dSPeter Dunlap #include <sys/sysmacros.h> 34a6d42e7dSPeter Dunlap #include <sys/socket.h> 35a6d42e7dSPeter Dunlap #include <sys/strsubr.h> 36a6d42e7dSPeter Dunlap #include <sys/nvpair.h> 37a6d42e7dSPeter Dunlap 38a6d42e7dSPeter Dunlap #include <sys/stmf.h> 39a6d42e7dSPeter Dunlap #include <sys/stmf_ioctl.h> 40a6d42e7dSPeter Dunlap #include <sys/portif.h> 41a6d42e7dSPeter Dunlap #include <sys/idm/idm.h> 42a6d42e7dSPeter Dunlap #include <sys/idm/idm_conn_sm.h> 43a6d42e7dSPeter Dunlap #include <iscsit_isns.h> 44a6d42e7dSPeter Dunlap #include <iscsit.h> 45a6d42e7dSPeter Dunlap 46a6d42e7dSPeter Dunlap #define ISCSIT_VERSION BUILD_DATE "-1.18dev" 47a6d42e7dSPeter Dunlap #define ISCSIT_NAME_VERSION "COMSTAR ISCSIT v" ISCSIT_VERSION 48a6d42e7dSPeter Dunlap 49a6d42e7dSPeter Dunlap /* 50a6d42e7dSPeter Dunlap * DDI entry points. 51a6d42e7dSPeter Dunlap */ 52a6d42e7dSPeter Dunlap static int iscsit_drv_attach(dev_info_t *, ddi_attach_cmd_t); 53a6d42e7dSPeter Dunlap static int iscsit_drv_detach(dev_info_t *, ddi_detach_cmd_t); 54a6d42e7dSPeter Dunlap static int iscsit_drv_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **); 55a6d42e7dSPeter Dunlap static int iscsit_drv_open(dev_t *, int, int, cred_t *); 56a6d42e7dSPeter Dunlap static int iscsit_drv_close(dev_t, int, int, cred_t *); 57a6d42e7dSPeter Dunlap static boolean_t iscsit_drv_busy(void); 58a6d42e7dSPeter Dunlap static int iscsit_drv_ioctl(dev_t, int, intptr_t, int, cred_t *, int *); 59a6d42e7dSPeter Dunlap 60a6d42e7dSPeter Dunlap extern struct mod_ops mod_miscops; 61a6d42e7dSPeter Dunlap 62a6d42e7dSPeter Dunlap 63a6d42e7dSPeter Dunlap static struct cb_ops iscsit_cb_ops = { 64a6d42e7dSPeter Dunlap iscsit_drv_open, /* cb_open */ 65a6d42e7dSPeter Dunlap iscsit_drv_close, /* cb_close */ 66a6d42e7dSPeter Dunlap nodev, /* cb_strategy */ 67a6d42e7dSPeter Dunlap nodev, /* cb_print */ 68a6d42e7dSPeter Dunlap nodev, /* cb_dump */ 69a6d42e7dSPeter Dunlap nodev, /* cb_read */ 70a6d42e7dSPeter Dunlap nodev, /* cb_write */ 71a6d42e7dSPeter Dunlap iscsit_drv_ioctl, /* cb_ioctl */ 72a6d42e7dSPeter Dunlap nodev, /* cb_devmap */ 73a6d42e7dSPeter Dunlap nodev, /* cb_mmap */ 74a6d42e7dSPeter Dunlap nodev, /* cb_segmap */ 75a6d42e7dSPeter Dunlap nochpoll, /* cb_chpoll */ 76a6d42e7dSPeter Dunlap ddi_prop_op, /* cb_prop_op */ 77a6d42e7dSPeter Dunlap NULL, /* cb_streamtab */ 78a6d42e7dSPeter Dunlap D_MP, /* cb_flag */ 79a6d42e7dSPeter Dunlap CB_REV, /* cb_rev */ 80a6d42e7dSPeter Dunlap nodev, /* cb_aread */ 81a6d42e7dSPeter Dunlap nodev, /* cb_awrite */ 82a6d42e7dSPeter Dunlap }; 83a6d42e7dSPeter Dunlap 84a6d42e7dSPeter Dunlap static struct dev_ops iscsit_dev_ops = { 85a6d42e7dSPeter Dunlap DEVO_REV, /* devo_rev */ 86a6d42e7dSPeter Dunlap 0, /* devo_refcnt */ 87a6d42e7dSPeter Dunlap iscsit_drv_getinfo, /* devo_getinfo */ 88a6d42e7dSPeter Dunlap nulldev, /* devo_identify */ 89a6d42e7dSPeter Dunlap nulldev, /* devo_probe */ 90a6d42e7dSPeter Dunlap iscsit_drv_attach, /* devo_attach */ 91a6d42e7dSPeter Dunlap iscsit_drv_detach, /* devo_detach */ 92a6d42e7dSPeter Dunlap nodev, /* devo_reset */ 93a6d42e7dSPeter Dunlap &iscsit_cb_ops, /* devo_cb_ops */ 94a6d42e7dSPeter Dunlap NULL, /* devo_bus_ops */ 95a6d42e7dSPeter Dunlap NULL, /* devo_power */ 9663528ae4SJames Moore ddi_quiesce_not_needed, /* quiesce */ 97a6d42e7dSPeter Dunlap }; 98a6d42e7dSPeter Dunlap 99a6d42e7dSPeter Dunlap static struct modldrv modldrv = { 100a6d42e7dSPeter Dunlap &mod_driverops, 101a6d42e7dSPeter Dunlap "iSCSI Target", 102a6d42e7dSPeter Dunlap &iscsit_dev_ops, 103a6d42e7dSPeter Dunlap }; 104a6d42e7dSPeter Dunlap 105a6d42e7dSPeter Dunlap static struct modlinkage modlinkage = { 106a6d42e7dSPeter Dunlap MODREV_1, 107a6d42e7dSPeter Dunlap &modldrv, 108a6d42e7dSPeter Dunlap NULL, 109a6d42e7dSPeter Dunlap }; 110a6d42e7dSPeter Dunlap 111a6d42e7dSPeter Dunlap 112a6d42e7dSPeter Dunlap iscsit_global_t iscsit_global; 113a6d42e7dSPeter Dunlap 114a6d42e7dSPeter Dunlap kmem_cache_t *iscsit_status_pdu_cache; 115a6d42e7dSPeter Dunlap 116a6d42e7dSPeter Dunlap boolean_t iscsit_sm_logging = B_FALSE; 117a6d42e7dSPeter Dunlap 118a6d42e7dSPeter Dunlap static idm_status_t iscsit_init(dev_info_t *dip); 119a6d42e7dSPeter Dunlap static idm_status_t iscsit_enable_svc(iscsit_hostinfo_t *hostinfo); 120a6d42e7dSPeter Dunlap static void iscsit_disable_svc(void); 121a6d42e7dSPeter Dunlap 122*d618d68dSPriya Krishnan static int 123*d618d68dSPriya Krishnan iscsit_check_cmdsn_and_queue(idm_pdu_t *rx_pdu); 124*d618d68dSPriya Krishnan 125*d618d68dSPriya Krishnan static void 126*d618d68dSPriya Krishnan iscsit_add_pdu_to_queue(iscsit_sess_t *ist, idm_pdu_t *rx_pdu); 127*d618d68dSPriya Krishnan 128*d618d68dSPriya Krishnan static idm_pdu_t * 129*d618d68dSPriya Krishnan iscsit_remove_pdu_from_queue(iscsit_sess_t *ist, uint32_t cmdsn); 130*d618d68dSPriya Krishnan 131*d618d68dSPriya Krishnan static void 132*d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(iscsit_sess_t *ist); 133*d618d68dSPriya Krishnan 134*d618d68dSPriya Krishnan static void 135*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_session(iscsit_sess_t *ist); 136*d618d68dSPriya Krishnan 137*d618d68dSPriya Krishnan static void 138*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor(void *arg); 139*d618d68dSPriya Krishnan 140*d618d68dSPriya Krishnan static void 141*d618d68dSPriya Krishnan iscsit_post_staged_pdu(idm_pdu_t *rx_pdu); 142*d618d68dSPriya Krishnan 143*d618d68dSPriya Krishnan static void 144*d618d68dSPriya Krishnan iscsit_post_scsi_cmd(idm_conn_t *ic, idm_pdu_t *rx_pdu); 145*d618d68dSPriya Krishnan 146a6d42e7dSPeter Dunlap static void 147a6d42e7dSPeter Dunlap iscsit_op_scsi_task_mgmt(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 148a6d42e7dSPeter Dunlap 149a6d42e7dSPeter Dunlap static void 150a6d42e7dSPeter Dunlap iscsit_pdu_op_noop(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 151a6d42e7dSPeter Dunlap 152a6d42e7dSPeter Dunlap static void 153a6d42e7dSPeter Dunlap iscsit_pdu_op_login_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 154a6d42e7dSPeter Dunlap 155a6d42e7dSPeter Dunlap void 156a6d42e7dSPeter Dunlap iscsit_pdu_op_text_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 157a6d42e7dSPeter Dunlap 158a6d42e7dSPeter Dunlap static void 159a6d42e7dSPeter Dunlap iscsit_pdu_op_logout_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 160a6d42e7dSPeter Dunlap 161a6d42e7dSPeter Dunlap int iscsit_cmd_window(); 162a6d42e7dSPeter Dunlap 163*d618d68dSPriya Krishnan static int 164*d618d68dSPriya Krishnan iscsit_sna_lt(uint32_t sn1, uint32_t sn2); 165*d618d68dSPriya Krishnan 166a6d42e7dSPeter Dunlap void 167a6d42e7dSPeter Dunlap iscsit_set_cmdsn(iscsit_conn_t *ict, idm_pdu_t *rx_pdu); 168a6d42e7dSPeter Dunlap 169a6d42e7dSPeter Dunlap static void 170a6d42e7dSPeter Dunlap iscsit_deferred_dispatch(idm_pdu_t *rx_pdu); 171a6d42e7dSPeter Dunlap 172a6d42e7dSPeter Dunlap static void 173a6d42e7dSPeter Dunlap iscsit_deferred(void *rx_pdu_void); 174a6d42e7dSPeter Dunlap 175a6d42e7dSPeter Dunlap static idm_status_t 176a6d42e7dSPeter Dunlap iscsit_conn_accept(idm_conn_t *ic); 177a6d42e7dSPeter Dunlap 178a6d42e7dSPeter Dunlap static idm_status_t 179a6d42e7dSPeter Dunlap iscsit_ffp_enabled(idm_conn_t *ic); 180a6d42e7dSPeter Dunlap 181a6d42e7dSPeter Dunlap static idm_status_t 182a6d42e7dSPeter Dunlap iscsit_ffp_disabled(idm_conn_t *ic, idm_ffp_disable_t disable_class); 183a6d42e7dSPeter Dunlap 184a6d42e7dSPeter Dunlap static idm_status_t 185a6d42e7dSPeter Dunlap iscsit_conn_lost(idm_conn_t *ic); 186a6d42e7dSPeter Dunlap 187a6d42e7dSPeter Dunlap static idm_status_t 188a6d42e7dSPeter Dunlap iscsit_conn_destroy(idm_conn_t *ic); 189a6d42e7dSPeter Dunlap 190a6d42e7dSPeter Dunlap static stmf_data_buf_t * 191a6d42e7dSPeter Dunlap iscsit_dbuf_alloc(scsi_task_t *task, uint32_t size, uint32_t *pminsize, 192a6d42e7dSPeter Dunlap uint32_t flags); 193a6d42e7dSPeter Dunlap 194a6d42e7dSPeter Dunlap static void 195a6d42e7dSPeter Dunlap iscsit_dbuf_free(stmf_dbuf_store_t *ds, stmf_data_buf_t *dbuf); 196a6d42e7dSPeter Dunlap 197a6d42e7dSPeter Dunlap static void 198a6d42e7dSPeter Dunlap iscsit_buf_xfer_cb(idm_buf_t *idb, idm_status_t status); 199a6d42e7dSPeter Dunlap 200a6d42e7dSPeter Dunlap static void 201a6d42e7dSPeter Dunlap iscsit_send_good_status_done(idm_pdu_t *pdu, idm_status_t status); 202a6d42e7dSPeter Dunlap 203a6d42e7dSPeter Dunlap static void 204a6d42e7dSPeter Dunlap iscsit_send_status_done(idm_pdu_t *pdu, idm_status_t status); 205a6d42e7dSPeter Dunlap 206a6d42e7dSPeter Dunlap static stmf_status_t 207a6d42e7dSPeter Dunlap iscsit_idm_to_stmf(idm_status_t idmrc); 208a6d42e7dSPeter Dunlap 209a6d42e7dSPeter Dunlap static iscsit_task_t * 210a6d42e7dSPeter Dunlap iscsit_task_alloc(iscsit_conn_t *ict); 211a6d42e7dSPeter Dunlap 212a6d42e7dSPeter Dunlap static void 213a6d42e7dSPeter Dunlap iscsit_task_free(iscsit_task_t *itask); 214a6d42e7dSPeter Dunlap 215a6d42e7dSPeter Dunlap static iscsit_task_t * 216a6d42e7dSPeter Dunlap iscsit_tm_task_alloc(iscsit_conn_t *ict); 217a6d42e7dSPeter Dunlap 218a6d42e7dSPeter Dunlap static void 219a6d42e7dSPeter Dunlap iscsit_tm_task_free(iscsit_task_t *itask); 220a6d42e7dSPeter Dunlap 22172cf3143Speter dunlap static idm_status_t 22272cf3143Speter dunlap iscsit_task_start(iscsit_task_t *itask); 22372cf3143Speter dunlap 22472cf3143Speter dunlap static void 22572cf3143Speter dunlap iscsit_task_done(iscsit_task_t *itask); 22672cf3143Speter dunlap 227a6d42e7dSPeter Dunlap static int 228a6d42e7dSPeter Dunlap iscsit_status_pdu_constructor(void *pdu_void, void *arg, int flags); 229a6d42e7dSPeter Dunlap 230a6d42e7dSPeter Dunlap static void 231a6d42e7dSPeter Dunlap iscsit_pp_cb(struct stmf_port_provider *pp, int cmd, void *arg, uint32_t flags); 232a6d42e7dSPeter Dunlap 233a6d42e7dSPeter Dunlap static it_cfg_status_t 234a6d42e7dSPeter Dunlap iscsit_config_merge(it_config_t *cfg); 235a6d42e7dSPeter Dunlap 236a6d42e7dSPeter Dunlap static idm_status_t 237a6d42e7dSPeter Dunlap iscsit_login_fail(idm_conn_t *ic); 238a6d42e7dSPeter Dunlap 23972cf3143Speter dunlap static boolean_t iscsit_cmdsn_in_window(iscsit_conn_t *ict, uint32_t cmdsn); 24072cf3143Speter dunlap static void iscsit_send_direct_scsi_resp(iscsit_conn_t *ict, idm_pdu_t *rx_pdu, 24172cf3143Speter dunlap uint8_t response, uint8_t cmd_status); 24272cf3143Speter dunlap static void iscsit_send_task_mgmt_resp(idm_pdu_t *tm_resp_pdu, 24372cf3143Speter dunlap uint8_t tm_status); 24472cf3143Speter dunlap 245*d618d68dSPriya Krishnan /* 246*d618d68dSPriya Krishnan * MC/S: Out-of-order commands are staged on a session-wide wait 247*d618d68dSPriya Krishnan * queue until a system-tunable threshold is reached. A separate 248*d618d68dSPriya Krishnan * thread is used to scan the staging queue on all the session, 249*d618d68dSPriya Krishnan * If a delayed PDU does not arrive within a timeout, the target 250*d618d68dSPriya Krishnan * will advance to the staged PDU that is next in sequence, skipping 251*d618d68dSPriya Krishnan * over the missing PDU(s) to go past a hole in the sequence. 252*d618d68dSPriya Krishnan */ 253*d618d68dSPriya Krishnan volatile int rxpdu_queue_threshold = ISCSIT_RXPDU_QUEUE_THRESHOLD; 254*d618d68dSPriya Krishnan 255*d618d68dSPriya Krishnan static kmutex_t iscsit_rxpdu_queue_monitor_mutex; 256*d618d68dSPriya Krishnan kthread_t *iscsit_rxpdu_queue_monitor_thr_id; 257*d618d68dSPriya Krishnan static kt_did_t iscsit_rxpdu_queue_monitor_thr_did; 258*d618d68dSPriya Krishnan static boolean_t iscsit_rxpdu_queue_monitor_thr_running; 259*d618d68dSPriya Krishnan static kcondvar_t iscsit_rxpdu_queue_monitor_cv; 260*d618d68dSPriya Krishnan 261a6d42e7dSPeter Dunlap int 262a6d42e7dSPeter Dunlap _init(void) 263a6d42e7dSPeter Dunlap { 264a6d42e7dSPeter Dunlap int rc; 265a6d42e7dSPeter Dunlap 266a6d42e7dSPeter Dunlap rw_init(&iscsit_global.global_rwlock, NULL, RW_DRIVER, NULL); 2678c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_init(&iscsit_global.global_state_mutex, NULL, 2688c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States MUTEX_DRIVER, NULL); 269a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DETACHED; 270a6d42e7dSPeter Dunlap 271*d618d68dSPriya Krishnan mutex_init(&iscsit_rxpdu_queue_monitor_mutex, NULL, 272*d618d68dSPriya Krishnan MUTEX_DRIVER, NULL); 273*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_id = NULL; 274*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_running = B_FALSE; 275*d618d68dSPriya Krishnan cv_init(&iscsit_rxpdu_queue_monitor_cv, NULL, CV_DEFAULT, NULL); 276*d618d68dSPriya Krishnan 277a6d42e7dSPeter Dunlap if ((rc = mod_install(&modlinkage)) != 0) { 2788c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_destroy(&iscsit_global.global_state_mutex); 279a6d42e7dSPeter Dunlap rw_destroy(&iscsit_global.global_rwlock); 280a6d42e7dSPeter Dunlap return (rc); 281a6d42e7dSPeter Dunlap } 282a6d42e7dSPeter Dunlap 283a6d42e7dSPeter Dunlap return (rc); 284a6d42e7dSPeter Dunlap } 285a6d42e7dSPeter Dunlap 286a6d42e7dSPeter Dunlap int 287a6d42e7dSPeter Dunlap _info(struct modinfo *modinfop) 288a6d42e7dSPeter Dunlap { 289a6d42e7dSPeter Dunlap return (mod_info(&modlinkage, modinfop)); 290a6d42e7dSPeter Dunlap } 291a6d42e7dSPeter Dunlap 292a6d42e7dSPeter Dunlap int 293a6d42e7dSPeter Dunlap _fini(void) 294a6d42e7dSPeter Dunlap { 295a6d42e7dSPeter Dunlap int rc; 296a6d42e7dSPeter Dunlap 297a6d42e7dSPeter Dunlap rc = mod_remove(&modlinkage); 298a6d42e7dSPeter Dunlap 299a6d42e7dSPeter Dunlap if (rc == 0) { 300*d618d68dSPriya Krishnan mutex_destroy(&iscsit_rxpdu_queue_monitor_mutex); 301*d618d68dSPriya Krishnan cv_destroy(&iscsit_rxpdu_queue_monitor_cv); 3028c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_destroy(&iscsit_global.global_state_mutex); 303a6d42e7dSPeter Dunlap rw_destroy(&iscsit_global.global_rwlock); 304a6d42e7dSPeter Dunlap } 305a6d42e7dSPeter Dunlap 306a6d42e7dSPeter Dunlap return (rc); 307a6d42e7dSPeter Dunlap } 308a6d42e7dSPeter Dunlap 309a6d42e7dSPeter Dunlap /* 310a6d42e7dSPeter Dunlap * DDI entry points. 311a6d42e7dSPeter Dunlap */ 312a6d42e7dSPeter Dunlap 313a6d42e7dSPeter Dunlap /* ARGSUSED */ 314a6d42e7dSPeter Dunlap static int 315a6d42e7dSPeter Dunlap iscsit_drv_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, 316a6d42e7dSPeter Dunlap void **result) 317a6d42e7dSPeter Dunlap { 318a6d42e7dSPeter Dunlap ulong_t instance = getminor((dev_t)arg); 319a6d42e7dSPeter Dunlap 320a6d42e7dSPeter Dunlap switch (cmd) { 321a6d42e7dSPeter Dunlap case DDI_INFO_DEVT2DEVINFO: 322a6d42e7dSPeter Dunlap *result = iscsit_global.global_dip; 323a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 324a6d42e7dSPeter Dunlap 325a6d42e7dSPeter Dunlap case DDI_INFO_DEVT2INSTANCE: 326a6d42e7dSPeter Dunlap *result = (void *)instance; 327a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 328a6d42e7dSPeter Dunlap 329a6d42e7dSPeter Dunlap default: 330a6d42e7dSPeter Dunlap break; 331a6d42e7dSPeter Dunlap } 332a6d42e7dSPeter Dunlap 333a6d42e7dSPeter Dunlap return (DDI_FAILURE); 334a6d42e7dSPeter Dunlap } 335a6d42e7dSPeter Dunlap 336a6d42e7dSPeter Dunlap static int 337a6d42e7dSPeter Dunlap iscsit_drv_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 338a6d42e7dSPeter Dunlap { 339a6d42e7dSPeter Dunlap if (cmd != DDI_ATTACH) { 340a6d42e7dSPeter Dunlap return (DDI_FAILURE); 341a6d42e7dSPeter Dunlap } 342a6d42e7dSPeter Dunlap 343a6d42e7dSPeter Dunlap if (ddi_get_instance(dip) != 0) { 344a6d42e7dSPeter Dunlap /* we only allow instance 0 to attach */ 345a6d42e7dSPeter Dunlap return (DDI_FAILURE); 346a6d42e7dSPeter Dunlap } 347a6d42e7dSPeter Dunlap 348a6d42e7dSPeter Dunlap /* create the minor node */ 349a6d42e7dSPeter Dunlap if (ddi_create_minor_node(dip, ISCSIT_MODNAME, S_IFCHR, 0, 350a6d42e7dSPeter Dunlap DDI_PSEUDO, 0) != DDI_SUCCESS) { 351a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "iscsit_drv_attach: " 352a6d42e7dSPeter Dunlap "failed creating minor node"); 353a6d42e7dSPeter Dunlap return (DDI_FAILURE); 354a6d42e7dSPeter Dunlap } 355a6d42e7dSPeter Dunlap 356a6d42e7dSPeter Dunlap if (iscsit_init(dip) != IDM_STATUS_SUCCESS) { 357a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "iscsit_drv_attach: " 358a6d42e7dSPeter Dunlap "failed to initialize"); 359a6d42e7dSPeter Dunlap ddi_remove_minor_node(dip, NULL); 360a6d42e7dSPeter Dunlap return (DDI_FAILURE); 361a6d42e7dSPeter Dunlap } 362a6d42e7dSPeter Dunlap 363a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 364a6d42e7dSPeter Dunlap iscsit_global.global_dip = dip; 365a6d42e7dSPeter Dunlap 366a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 367a6d42e7dSPeter Dunlap } 368a6d42e7dSPeter Dunlap 369a6d42e7dSPeter Dunlap /*ARGSUSED*/ 370a6d42e7dSPeter Dunlap static int 371a6d42e7dSPeter Dunlap iscsit_drv_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 372a6d42e7dSPeter Dunlap { 373a6d42e7dSPeter Dunlap if (cmd != DDI_DETACH) 374a6d42e7dSPeter Dunlap return (DDI_FAILURE); 375a6d42e7dSPeter Dunlap 3768c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* 3778c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * drv_detach is called in a context that owns the 3788c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * device node for the /dev/pseudo device. If this thread blocks 3798c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * for any resource, other threads that need the /dev/pseudo device 3808c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * may end up in a deadlock with this thread.Hence, we use a 3818c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * separate lock just for the structures that drv_detach needs 3828c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * to access. 3838c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States */ 3848c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 385a6d42e7dSPeter Dunlap if (iscsit_drv_busy()) { 3868c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 387a6d42e7dSPeter Dunlap return (EBUSY); 388a6d42e7dSPeter Dunlap } 389a6d42e7dSPeter Dunlap 390a6d42e7dSPeter Dunlap iscsit_global.global_dip = NULL; 391a6d42e7dSPeter Dunlap ddi_remove_minor_node(dip, NULL); 392a6d42e7dSPeter Dunlap 393a6d42e7dSPeter Dunlap ldi_ident_release(iscsit_global.global_li); 394a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DETACHED; 395a6d42e7dSPeter Dunlap 3968c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 397a6d42e7dSPeter Dunlap 398a6d42e7dSPeter Dunlap return (DDI_SUCCESS); 399a6d42e7dSPeter Dunlap } 400a6d42e7dSPeter Dunlap 401a6d42e7dSPeter Dunlap /*ARGSUSED*/ 402a6d42e7dSPeter Dunlap static int 403a6d42e7dSPeter Dunlap iscsit_drv_open(dev_t *devp, int flag, int otyp, cred_t *credp) 404a6d42e7dSPeter Dunlap { 405a6d42e7dSPeter Dunlap return (0); 406a6d42e7dSPeter Dunlap } 407a6d42e7dSPeter Dunlap 408a6d42e7dSPeter Dunlap /* ARGSUSED */ 409a6d42e7dSPeter Dunlap static int 410a6d42e7dSPeter Dunlap iscsit_drv_close(dev_t dev, int flag, int otyp, cred_t *credp) 411a6d42e7dSPeter Dunlap { 412a6d42e7dSPeter Dunlap return (0); 413a6d42e7dSPeter Dunlap } 414a6d42e7dSPeter Dunlap 415a6d42e7dSPeter Dunlap static boolean_t 416a6d42e7dSPeter Dunlap iscsit_drv_busy(void) 417a6d42e7dSPeter Dunlap { 4188c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT(MUTEX_HELD(&iscsit_global.global_state_mutex)); 4198c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 420a6d42e7dSPeter Dunlap switch (iscsit_global.global_svc_state) { 421a6d42e7dSPeter Dunlap case ISE_DISABLED: 422a6d42e7dSPeter Dunlap case ISE_DETACHED: 423a6d42e7dSPeter Dunlap return (B_FALSE); 424a6d42e7dSPeter Dunlap default: 425a6d42e7dSPeter Dunlap return (B_TRUE); 426a6d42e7dSPeter Dunlap } 427a6d42e7dSPeter Dunlap /* NOTREACHED */ 428a6d42e7dSPeter Dunlap } 429a6d42e7dSPeter Dunlap 430a6d42e7dSPeter Dunlap /* ARGSUSED */ 431a6d42e7dSPeter Dunlap static int 432a6d42e7dSPeter Dunlap iscsit_drv_ioctl(dev_t drv, int cmd, intptr_t argp, int flag, cred_t *cred, 433a6d42e7dSPeter Dunlap int *retval) 434a6d42e7dSPeter Dunlap { 435a6d42e7dSPeter Dunlap iscsit_ioc_set_config_t setcfg; 436a6d42e7dSPeter Dunlap iscsit_ioc_set_config32_t setcfg32; 43707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States char *cfg_pnvlist = NULL; 43807a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States nvlist_t *cfg_nvlist = NULL; 43907a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States it_config_t *cfg = NULL; 440a6d42e7dSPeter Dunlap idm_status_t idmrc; 441a6d42e7dSPeter Dunlap int rc = 0; 442a6d42e7dSPeter Dunlap 443a6d42e7dSPeter Dunlap if (drv_priv(cred) != 0) { 444a6d42e7dSPeter Dunlap return (EPERM); 445a6d42e7dSPeter Dunlap } 446a6d42e7dSPeter Dunlap 4478c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 448a6d42e7dSPeter Dunlap 449a6d42e7dSPeter Dunlap /* 450a6d42e7dSPeter Dunlap * Validate ioctl requests against global service state 451a6d42e7dSPeter Dunlap */ 452a6d42e7dSPeter Dunlap switch (iscsit_global.global_svc_state) { 453a6d42e7dSPeter Dunlap case ISE_ENABLED: 454a6d42e7dSPeter Dunlap if (cmd == ISCSIT_IOC_DISABLE_SVC) { 455a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLING; 456a6d42e7dSPeter Dunlap } else if (cmd == ISCSIT_IOC_ENABLE_SVC) { 457a6d42e7dSPeter Dunlap /* Already enabled */ 4588c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 459a6d42e7dSPeter Dunlap return (0); 460a6d42e7dSPeter Dunlap } else { 461a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_BUSY; 462a6d42e7dSPeter Dunlap } 463a6d42e7dSPeter Dunlap break; 464a6d42e7dSPeter Dunlap case ISE_DISABLED: 465a6d42e7dSPeter Dunlap if (cmd == ISCSIT_IOC_ENABLE_SVC) { 466a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_ENABLING; 467a6d42e7dSPeter Dunlap } else if (cmd == ISCSIT_IOC_DISABLE_SVC) { 468a6d42e7dSPeter Dunlap /* Already disabled */ 4698c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 470a6d42e7dSPeter Dunlap return (0); 471a6d42e7dSPeter Dunlap } else { 472a6d42e7dSPeter Dunlap rc = EFAULT; 473a6d42e7dSPeter Dunlap } 474a6d42e7dSPeter Dunlap break; 4758c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_BUSY: 476a6d42e7dSPeter Dunlap case ISE_ENABLING: 477a6d42e7dSPeter Dunlap case ISE_DISABLING: 478a6d42e7dSPeter Dunlap rc = EAGAIN; 479a6d42e7dSPeter Dunlap break; 480a6d42e7dSPeter Dunlap case ISE_DETACHED: 481a6d42e7dSPeter Dunlap default: 482a6d42e7dSPeter Dunlap rc = EFAULT; 483a6d42e7dSPeter Dunlap break; 484a6d42e7dSPeter Dunlap } 485a6d42e7dSPeter Dunlap 4868c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 487a6d42e7dSPeter Dunlap if (rc != 0) 488a6d42e7dSPeter Dunlap return (rc); 489a6d42e7dSPeter Dunlap 490a6d42e7dSPeter Dunlap /* Handle ioctl request (enable/disable have already been handled) */ 491a6d42e7dSPeter Dunlap switch (cmd) { 492a6d42e7dSPeter Dunlap case ISCSIT_IOC_SET_CONFIG: 49307a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* Any errors must set state back to ISE_ENABLED */ 494a6d42e7dSPeter Dunlap switch (ddi_model_convert_from(flag & FMODELS)) { 495a6d42e7dSPeter Dunlap case DDI_MODEL_ILP32: 496a6d42e7dSPeter Dunlap if (ddi_copyin((void *)argp, &setcfg32, 49707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States sizeof (iscsit_ioc_set_config32_t), flag) != 0) { 49807a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EFAULT; 49907a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 50007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States } 501a6d42e7dSPeter Dunlap 502a6d42e7dSPeter Dunlap setcfg.set_cfg_pnvlist = 503a6d42e7dSPeter Dunlap (char *)((uintptr_t)setcfg32.set_cfg_pnvlist); 504a6d42e7dSPeter Dunlap setcfg.set_cfg_vers = setcfg32.set_cfg_vers; 505a6d42e7dSPeter Dunlap setcfg.set_cfg_pnvlist_len = 506a6d42e7dSPeter Dunlap setcfg32.set_cfg_pnvlist_len; 507a6d42e7dSPeter Dunlap break; 508a6d42e7dSPeter Dunlap case DDI_MODEL_NONE: 509a6d42e7dSPeter Dunlap if (ddi_copyin((void *)argp, &setcfg, 51007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States sizeof (iscsit_ioc_set_config_t), flag) != 0) { 51107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EFAULT; 51207a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 51307a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States } 514a6d42e7dSPeter Dunlap break; 515fcc214c3SCharles Ting default: 516fcc214c3SCharles Ting rc = EFAULT; 517fcc214c3SCharles Ting goto cleanup; 518a6d42e7dSPeter Dunlap } 519a6d42e7dSPeter Dunlap 520a6d42e7dSPeter Dunlap /* Check API version */ 521a6d42e7dSPeter Dunlap if (setcfg.set_cfg_vers != ISCSIT_API_VERS0) { 52207a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EINVAL; 52307a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 524a6d42e7dSPeter Dunlap } 525a6d42e7dSPeter Dunlap 526a6d42e7dSPeter Dunlap /* Config is in packed nvlist format so unpack it */ 527a6d42e7dSPeter Dunlap cfg_pnvlist = kmem_alloc(setcfg.set_cfg_pnvlist_len, 528a6d42e7dSPeter Dunlap KM_SLEEP); 529a6d42e7dSPeter Dunlap ASSERT(cfg_pnvlist != NULL); 530a6d42e7dSPeter Dunlap 531a6d42e7dSPeter Dunlap if (ddi_copyin(setcfg.set_cfg_pnvlist, cfg_pnvlist, 532a6d42e7dSPeter Dunlap setcfg.set_cfg_pnvlist_len, flag) != 0) { 53307a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = EFAULT; 53407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 535a6d42e7dSPeter Dunlap } 536a6d42e7dSPeter Dunlap 53707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = nvlist_unpack(cfg_pnvlist, setcfg.set_cfg_pnvlist_len, 53807a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States &cfg_nvlist, KM_SLEEP); 53907a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (rc != 0) { 54007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 541a6d42e7dSPeter Dunlap } 542a6d42e7dSPeter Dunlap 543a6d42e7dSPeter Dunlap /* Translate nvlist */ 54407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = it_nv_to_config(cfg_nvlist, &cfg); 54507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (rc != 0) { 546a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "Configuration is invalid"); 54707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States goto cleanup; 548a6d42e7dSPeter Dunlap } 549a6d42e7dSPeter Dunlap 550a6d42e7dSPeter Dunlap /* Update config */ 55107a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States rc = iscsit_config_merge(cfg); 55207a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* FALLTHROUGH */ 55307a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States 55407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States cleanup: 55507a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (cfg) 55607a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States it_config_free_cmn(cfg); 55707a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (cfg_pnvlist) 558a6d42e7dSPeter Dunlap kmem_free(cfg_pnvlist, setcfg.set_cfg_pnvlist_len); 55907a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States if (cfg_nvlist) 560a6d42e7dSPeter Dunlap nvlist_free(cfg_nvlist); 561a6d42e7dSPeter Dunlap 562a6d42e7dSPeter Dunlap /* 563a6d42e7dSPeter Dunlap * Now that the reconfig is complete set our state back to 564a6d42e7dSPeter Dunlap * enabled. 565a6d42e7dSPeter Dunlap */ 5668c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 567a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_ENABLED; 5688c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 569a6d42e7dSPeter Dunlap break; 570a6d42e7dSPeter Dunlap case ISCSIT_IOC_ENABLE_SVC: { 571a6d42e7dSPeter Dunlap iscsit_hostinfo_t hostinfo; 572a6d42e7dSPeter Dunlap 573a6d42e7dSPeter Dunlap if (ddi_copyin((void *)argp, &hostinfo.length, 574a6d42e7dSPeter Dunlap sizeof (hostinfo.length), flag) != 0) { 5758c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 576a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 5778c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 578a6d42e7dSPeter Dunlap return (EFAULT); 579a6d42e7dSPeter Dunlap } 580a6d42e7dSPeter Dunlap 581a6d42e7dSPeter Dunlap if (hostinfo.length > sizeof (hostinfo.fqhn)) 582a6d42e7dSPeter Dunlap hostinfo.length = sizeof (hostinfo.fqhn); 583a6d42e7dSPeter Dunlap 584a6d42e7dSPeter Dunlap if (ddi_copyin((void *)((caddr_t)argp + 585a6d42e7dSPeter Dunlap sizeof (hostinfo.length)), &hostinfo.fqhn, 586a6d42e7dSPeter Dunlap hostinfo.length, flag) != 0) { 5878c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 588a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 5898c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 590a6d42e7dSPeter Dunlap return (EFAULT); 591a6d42e7dSPeter Dunlap } 592a6d42e7dSPeter Dunlap 593a6d42e7dSPeter Dunlap idmrc = iscsit_enable_svc(&hostinfo); 5948c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 595a6d42e7dSPeter Dunlap if (idmrc == IDM_STATUS_SUCCESS) { 596a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_ENABLED; 597a6d42e7dSPeter Dunlap } else { 598a6d42e7dSPeter Dunlap rc = EIO; 599a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 600a6d42e7dSPeter Dunlap } 6018c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 602a6d42e7dSPeter Dunlap break; 603a6d42e7dSPeter Dunlap } 604a6d42e7dSPeter Dunlap case ISCSIT_IOC_DISABLE_SVC: 605a6d42e7dSPeter Dunlap iscsit_disable_svc(); 6068c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 607a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 6088c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 609a6d42e7dSPeter Dunlap break; 61007a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States 611a6d42e7dSPeter Dunlap default: 612a6d42e7dSPeter Dunlap rc = EINVAL; 6138c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 61407a2bfd1SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state = ISE_ENABLED; 6158c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 616a6d42e7dSPeter Dunlap } 617a6d42e7dSPeter Dunlap 618a6d42e7dSPeter Dunlap return (rc); 619a6d42e7dSPeter Dunlap } 620a6d42e7dSPeter Dunlap 621a6d42e7dSPeter Dunlap static idm_status_t 622a6d42e7dSPeter Dunlap iscsit_init(dev_info_t *dip) 623a6d42e7dSPeter Dunlap { 624a6d42e7dSPeter Dunlap int rc; 625a6d42e7dSPeter Dunlap 626a6d42e7dSPeter Dunlap rc = ldi_ident_from_dip(dip, &iscsit_global.global_li); 627a6d42e7dSPeter Dunlap ASSERT(rc == 0); /* Failure indicates invalid argument */ 628a6d42e7dSPeter Dunlap 629a6d42e7dSPeter Dunlap iscsit_global.global_svc_state = ISE_DISABLED; 630a6d42e7dSPeter Dunlap 631a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 632a6d42e7dSPeter Dunlap } 633a6d42e7dSPeter Dunlap 634a6d42e7dSPeter Dunlap /* 635a6d42e7dSPeter Dunlap * iscsit_enable_svc 636a6d42e7dSPeter Dunlap * 637a6d42e7dSPeter Dunlap * registers all the configured targets and target portals with STMF 638a6d42e7dSPeter Dunlap */ 639a6d42e7dSPeter Dunlap static idm_status_t 640a6d42e7dSPeter Dunlap iscsit_enable_svc(iscsit_hostinfo_t *hostinfo) 641a6d42e7dSPeter Dunlap { 642a6d42e7dSPeter Dunlap stmf_port_provider_t *pp; 643a6d42e7dSPeter Dunlap stmf_dbuf_store_t *dbuf_store; 644a6d42e7dSPeter Dunlap boolean_t did_iscsit_isns_init; 645a6d42e7dSPeter Dunlap idm_status_t retval = IDM_STATUS_SUCCESS; 646a6d42e7dSPeter Dunlap 647a6d42e7dSPeter Dunlap ASSERT(iscsit_global.global_svc_state == ISE_ENABLING); 648a6d42e7dSPeter Dunlap 649a6d42e7dSPeter Dunlap /* 650a6d42e7dSPeter Dunlap * Make sure that can tell if we have partially allocated 651a6d42e7dSPeter Dunlap * in case we need to exit and tear down anything allocated. 652a6d42e7dSPeter Dunlap */ 653a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = NULL; 654a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = NULL; 655a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = NULL; 656a6d42e7dSPeter Dunlap pp = NULL; 657a6d42e7dSPeter Dunlap iscsit_global.global_pp = NULL; 658a6d42e7dSPeter Dunlap iscsit_global.global_default_tpg = NULL; 659a6d42e7dSPeter Dunlap did_iscsit_isns_init = B_FALSE; 660a6d42e7dSPeter Dunlap iscsit_global.global_dispatch_taskq = NULL; 661a6d42e7dSPeter Dunlap 662a6d42e7dSPeter Dunlap /* Setup remaining fields in iscsit_global_t */ 663a6d42e7dSPeter Dunlap idm_refcnt_init(&iscsit_global.global_refcnt, 664a6d42e7dSPeter Dunlap &iscsit_global); 665a6d42e7dSPeter Dunlap 666a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_discovery_sessions, 667a6d42e7dSPeter Dunlap iscsit_sess_avl_compare, sizeof (iscsit_sess_t), 668a6d42e7dSPeter Dunlap offsetof(iscsit_sess_t, ist_tgt_ln)); 669a6d42e7dSPeter Dunlap 670a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_target_list, 671a6d42e7dSPeter Dunlap iscsit_tgt_avl_compare, sizeof (iscsit_tgt_t), 672a6d42e7dSPeter Dunlap offsetof(iscsit_tgt_t, target_global_ln)); 673a6d42e7dSPeter Dunlap 674a6d42e7dSPeter Dunlap list_create(&iscsit_global.global_deleted_target_list, 675a6d42e7dSPeter Dunlap sizeof (iscsit_tgt_t), 676a6d42e7dSPeter Dunlap offsetof(iscsit_tgt_t, target_global_deleted_ln)); 677a6d42e7dSPeter Dunlap 678a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_tpg_list, 679a6d42e7dSPeter Dunlap iscsit_tpg_avl_compare, sizeof (iscsit_tpg_t), 680a6d42e7dSPeter Dunlap offsetof(iscsit_tpg_t, tpg_global_ln)); 681a6d42e7dSPeter Dunlap 682a6d42e7dSPeter Dunlap avl_create(&iscsit_global.global_ini_list, 683a6d42e7dSPeter Dunlap iscsit_ini_avl_compare, sizeof (iscsit_ini_t), 684a6d42e7dSPeter Dunlap offsetof(iscsit_ini_t, ini_global_ln)); 685a6d42e7dSPeter Dunlap 686a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = vmem_create("iscsit_tsih_pool", 687a6d42e7dSPeter Dunlap (void *)1, ISCSI_MAX_TSIH, 1, NULL, NULL, NULL, 0, 688a6d42e7dSPeter Dunlap VM_SLEEP | VMC_IDENTIFIER); 689a6d42e7dSPeter Dunlap 690a6d42e7dSPeter Dunlap /* 691a6d42e7dSPeter Dunlap * Setup STMF dbuf store. Our buffers are bound to a specific 692a6d42e7dSPeter Dunlap * connection so we really can't let STMF cache buffers for us. 693a6d42e7dSPeter Dunlap * Consequently we'll just allocate one global buffer store. 694a6d42e7dSPeter Dunlap */ 695a6d42e7dSPeter Dunlap dbuf_store = stmf_alloc(STMF_STRUCT_DBUF_STORE, 0, 0); 696a6d42e7dSPeter Dunlap if (dbuf_store == NULL) { 697a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 698a6d42e7dSPeter Dunlap goto tear_down_and_return; 699a6d42e7dSPeter Dunlap } 700a6d42e7dSPeter Dunlap dbuf_store->ds_alloc_data_buf = iscsit_dbuf_alloc; 701a6d42e7dSPeter Dunlap dbuf_store->ds_free_data_buf = iscsit_dbuf_free; 702a6d42e7dSPeter Dunlap dbuf_store->ds_port_private = NULL; 703a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = dbuf_store; 704a6d42e7dSPeter Dunlap 705a6d42e7dSPeter Dunlap /* Status PDU cache */ 706a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = kmem_cache_create("iscsit_status_pdu_cache", 707a6d42e7dSPeter Dunlap sizeof (idm_pdu_t) + sizeof (iscsi_scsi_rsp_hdr_t), 8, 708a6d42e7dSPeter Dunlap &iscsit_status_pdu_constructor, 709a6d42e7dSPeter Dunlap NULL, NULL, NULL, NULL, KM_SLEEP); 710a6d42e7dSPeter Dunlap 711a6d42e7dSPeter Dunlap /* Default TPG and portal */ 712a6d42e7dSPeter Dunlap iscsit_global.global_default_tpg = iscsit_tpg_createdefault(); 713a6d42e7dSPeter Dunlap if (iscsit_global.global_default_tpg == NULL) { 714a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 715a6d42e7dSPeter Dunlap goto tear_down_and_return; 716a6d42e7dSPeter Dunlap } 717a6d42e7dSPeter Dunlap 718a6d42e7dSPeter Dunlap /* initialize isns client */ 719a6d42e7dSPeter Dunlap (void) iscsit_isns_init(hostinfo); 720a6d42e7dSPeter Dunlap did_iscsit_isns_init = B_TRUE; 721a6d42e7dSPeter Dunlap 722a6d42e7dSPeter Dunlap /* Register port provider */ 723a6d42e7dSPeter Dunlap pp = stmf_alloc(STMF_STRUCT_PORT_PROVIDER, 0, 0); 724a6d42e7dSPeter Dunlap if (pp == NULL) { 725a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 726a6d42e7dSPeter Dunlap goto tear_down_and_return; 727a6d42e7dSPeter Dunlap } 728a6d42e7dSPeter Dunlap 729a6d42e7dSPeter Dunlap pp->pp_portif_rev = PORTIF_REV_1; 730a6d42e7dSPeter Dunlap pp->pp_instance = 0; 731a6d42e7dSPeter Dunlap pp->pp_name = ISCSIT_MODNAME; 732a6d42e7dSPeter Dunlap pp->pp_cb = iscsit_pp_cb; 733a6d42e7dSPeter Dunlap 734a6d42e7dSPeter Dunlap iscsit_global.global_pp = pp; 735a6d42e7dSPeter Dunlap 736a6d42e7dSPeter Dunlap 737a6d42e7dSPeter Dunlap if (stmf_register_port_provider(pp) != STMF_SUCCESS) { 738a6d42e7dSPeter Dunlap retval = IDM_STATUS_FAIL; 739a6d42e7dSPeter Dunlap goto tear_down_and_return; 740a6d42e7dSPeter Dunlap } 741a6d42e7dSPeter Dunlap 742a6d42e7dSPeter Dunlap iscsit_global.global_dispatch_taskq = taskq_create("iscsit_dispatch", 743a6d42e7dSPeter Dunlap 1, minclsyspri, 16, 16, TASKQ_PREPOPULATE); 744a6d42e7dSPeter Dunlap 745*d618d68dSPriya Krishnan /* Scan staged PDUs, meaningful in MC/S situations */ 746*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_start(); 747*d618d68dSPriya Krishnan 748a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 749a6d42e7dSPeter Dunlap 750a6d42e7dSPeter Dunlap tear_down_and_return: 751a6d42e7dSPeter Dunlap 752a6d42e7dSPeter Dunlap if (iscsit_global.global_dispatch_taskq) { 753a6d42e7dSPeter Dunlap taskq_destroy(iscsit_global.global_dispatch_taskq); 754a6d42e7dSPeter Dunlap iscsit_global.global_dispatch_taskq = NULL; 755a6d42e7dSPeter Dunlap } 756a6d42e7dSPeter Dunlap 757a6d42e7dSPeter Dunlap if (did_iscsit_isns_init) 758a6d42e7dSPeter Dunlap iscsit_isns_fini(); 759a6d42e7dSPeter Dunlap 760a6d42e7dSPeter Dunlap if (iscsit_global.global_default_tpg) { 761a6d42e7dSPeter Dunlap iscsit_tpg_destroydefault(iscsit_global.global_default_tpg); 762a6d42e7dSPeter Dunlap iscsit_global.global_default_tpg = NULL; 763a6d42e7dSPeter Dunlap } 764a6d42e7dSPeter Dunlap 765a6d42e7dSPeter Dunlap if (iscsit_global.global_pp) 766a6d42e7dSPeter Dunlap iscsit_global.global_pp = NULL; 767a6d42e7dSPeter Dunlap 768a6d42e7dSPeter Dunlap if (pp) 769a6d42e7dSPeter Dunlap stmf_free(pp); 770a6d42e7dSPeter Dunlap 771a6d42e7dSPeter Dunlap if (iscsit_status_pdu_cache) { 772a6d42e7dSPeter Dunlap kmem_cache_destroy(iscsit_status_pdu_cache); 773a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = NULL; 774a6d42e7dSPeter Dunlap } 775a6d42e7dSPeter Dunlap 776a6d42e7dSPeter Dunlap if (iscsit_global.global_dbuf_store) { 777a6d42e7dSPeter Dunlap stmf_free(iscsit_global.global_dbuf_store); 778a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = NULL; 779a6d42e7dSPeter Dunlap } 780a6d42e7dSPeter Dunlap 781a6d42e7dSPeter Dunlap if (iscsit_global.global_tsih_pool) { 782a6d42e7dSPeter Dunlap vmem_destroy(iscsit_global.global_tsih_pool); 783a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = NULL; 784a6d42e7dSPeter Dunlap } 785a6d42e7dSPeter Dunlap 786a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_ini_list); 787a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_tpg_list); 788a6d42e7dSPeter Dunlap list_destroy(&iscsit_global.global_deleted_target_list); 789a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_target_list); 790a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_discovery_sessions); 791a6d42e7dSPeter Dunlap 792a6d42e7dSPeter Dunlap idm_refcnt_destroy(&iscsit_global.global_refcnt); 793a6d42e7dSPeter Dunlap 794a6d42e7dSPeter Dunlap return (retval); 795a6d42e7dSPeter Dunlap } 796a6d42e7dSPeter Dunlap 797a6d42e7dSPeter Dunlap /* 798a6d42e7dSPeter Dunlap * iscsit_disable_svc 799a6d42e7dSPeter Dunlap * 800a6d42e7dSPeter Dunlap * clean up all existing connections and deregister targets from STMF 801a6d42e7dSPeter Dunlap */ 802a6d42e7dSPeter Dunlap static void 803a6d42e7dSPeter Dunlap iscsit_disable_svc(void) 804a6d42e7dSPeter Dunlap { 805a6d42e7dSPeter Dunlap iscsit_sess_t *sess; 806a6d42e7dSPeter Dunlap 807a6d42e7dSPeter Dunlap ASSERT(iscsit_global.global_svc_state == ISE_DISABLING); 808a6d42e7dSPeter Dunlap 809*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_stop(); 810*d618d68dSPriya Krishnan 811a6d42e7dSPeter Dunlap /* tear down discovery sessions */ 812a6d42e7dSPeter Dunlap for (sess = avl_first(&iscsit_global.global_discovery_sessions); 813a6d42e7dSPeter Dunlap sess != NULL; 814a6d42e7dSPeter Dunlap sess = AVL_NEXT(&iscsit_global.global_discovery_sessions, sess)) 815a6d42e7dSPeter Dunlap iscsit_sess_close(sess); 816a6d42e7dSPeter Dunlap 817a6d42e7dSPeter Dunlap /* 818a6d42e7dSPeter Dunlap * Passing NULL to iscsit_config_merge tells it to go to an empty 819a6d42e7dSPeter Dunlap * config. 820a6d42e7dSPeter Dunlap */ 821a6d42e7dSPeter Dunlap (void) iscsit_config_merge(NULL); 822a6d42e7dSPeter Dunlap 823a6d42e7dSPeter Dunlap /* 824a6d42e7dSPeter Dunlap * Wait until there are no more global references 825a6d42e7dSPeter Dunlap */ 826a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&iscsit_global.global_refcnt); 827a6d42e7dSPeter Dunlap idm_refcnt_destroy(&iscsit_global.global_refcnt); 828a6d42e7dSPeter Dunlap 829a6d42e7dSPeter Dunlap /* 830a6d42e7dSPeter Dunlap * Default TPG must be destroyed after global_refcnt is 0. 831a6d42e7dSPeter Dunlap */ 832a6d42e7dSPeter Dunlap iscsit_tpg_destroydefault(iscsit_global.global_default_tpg); 833a6d42e7dSPeter Dunlap 834a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_discovery_sessions); 835a6d42e7dSPeter Dunlap list_destroy(&iscsit_global.global_deleted_target_list); 836a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_target_list); 837a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_tpg_list); 838a6d42e7dSPeter Dunlap avl_destroy(&iscsit_global.global_ini_list); 839a6d42e7dSPeter Dunlap 840a6d42e7dSPeter Dunlap taskq_destroy(iscsit_global.global_dispatch_taskq); 841a6d42e7dSPeter Dunlap 842a6d42e7dSPeter Dunlap iscsit_isns_fini(); 843a6d42e7dSPeter Dunlap 844a6d42e7dSPeter Dunlap stmf_free(iscsit_global.global_dbuf_store); 845a6d42e7dSPeter Dunlap iscsit_global.global_dbuf_store = NULL; 846a6d42e7dSPeter Dunlap 847a6d42e7dSPeter Dunlap (void) stmf_deregister_port_provider(iscsit_global.global_pp); 848a6d42e7dSPeter Dunlap stmf_free(iscsit_global.global_pp); 849a6d42e7dSPeter Dunlap iscsit_global.global_pp = NULL; 850a6d42e7dSPeter Dunlap 851a6d42e7dSPeter Dunlap kmem_cache_destroy(iscsit_status_pdu_cache); 852a6d42e7dSPeter Dunlap iscsit_status_pdu_cache = NULL; 853a6d42e7dSPeter Dunlap 854a6d42e7dSPeter Dunlap vmem_destroy(iscsit_global.global_tsih_pool); 855a6d42e7dSPeter Dunlap iscsit_global.global_tsih_pool = NULL; 856a6d42e7dSPeter Dunlap } 857a6d42e7dSPeter Dunlap 858a6d42e7dSPeter Dunlap void 859a6d42e7dSPeter Dunlap iscsit_global_hold() 860a6d42e7dSPeter Dunlap { 8618c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* 8628c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * To take out a global hold, we must either own the global 8638c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * state mutex or we must be running inside of an ioctl that 8648c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * has set the global state to ISE_BUSY, ISE_DISABLING, or 8658c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * ISE_ENABLING. We don't track the "owner" for these flags, 8668c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * so just checking if they are set is enough for now. 8678c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States */ 8688c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT((iscsit_global.global_svc_state == ISE_ENABLING) || 8698c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States (iscsit_global.global_svc_state == ISE_DISABLING) || 8708c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States (iscsit_global.global_svc_state == ISE_BUSY) || 8718c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States MUTEX_HELD(&iscsit_global.global_state_mutex)); 8728c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 873a6d42e7dSPeter Dunlap idm_refcnt_hold(&iscsit_global.global_refcnt); 874a6d42e7dSPeter Dunlap } 875a6d42e7dSPeter Dunlap 876a6d42e7dSPeter Dunlap void 877a6d42e7dSPeter Dunlap iscsit_global_rele() 878a6d42e7dSPeter Dunlap { 879a6d42e7dSPeter Dunlap idm_refcnt_rele(&iscsit_global.global_refcnt); 880a6d42e7dSPeter Dunlap } 881a6d42e7dSPeter Dunlap 882a6d42e7dSPeter Dunlap void 883a6d42e7dSPeter Dunlap iscsit_global_wait_ref() 884a6d42e7dSPeter Dunlap { 885a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&iscsit_global.global_refcnt); 886a6d42e7dSPeter Dunlap } 887a6d42e7dSPeter Dunlap 888a6d42e7dSPeter Dunlap /* 889a6d42e7dSPeter Dunlap * IDM callbacks 890a6d42e7dSPeter Dunlap */ 891a6d42e7dSPeter Dunlap 892a6d42e7dSPeter Dunlap /*ARGSUSED*/ 893a6d42e7dSPeter Dunlap void 894a6d42e7dSPeter Dunlap iscsit_rx_pdu(idm_conn_t *ic, idm_pdu_t *rx_pdu) 895a6d42e7dSPeter Dunlap { 896a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 897a6d42e7dSPeter Dunlap switch (IDM_PDU_OPCODE(rx_pdu)) { 898a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_CMD: 899a6d42e7dSPeter Dunlap ASSERT(0); /* Shouldn't happen */ 900a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 901a6d42e7dSPeter Dunlap break; 902a6d42e7dSPeter Dunlap case ISCSI_OP_SNACK_CMD: 903a6d42e7dSPeter Dunlap /* 904a6d42e7dSPeter Dunlap * We'll need to handle this when we support ERL1/2. For 905a6d42e7dSPeter Dunlap * now we treat it as a protocol error. 906a6d42e7dSPeter Dunlap */ 907a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 908a6d42e7dSPeter Dunlap idm_conn_event(ic, CE_TRANSPORT_FAIL, NULL); 909a6d42e7dSPeter Dunlap break; 910a6d42e7dSPeter Dunlap case ISCSI_OP_SCSI_TASK_MGT_MSG: 911*d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 912*d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 913*d618d68dSPriya Krishnan iscsit_op_scsi_task_mgmt(ict, rx_pdu); 914*d618d68dSPriya Krishnan } 915a6d42e7dSPeter Dunlap break; 916a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_OUT: 917a6d42e7dSPeter Dunlap case ISCSI_OP_LOGIN_CMD: 918a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_CMD: 919a6d42e7dSPeter Dunlap case ISCSI_OP_LOGOUT_CMD: 920a6d42e7dSPeter Dunlap /* 921a6d42e7dSPeter Dunlap * If/when we switch to userland processing these PDU's 922a6d42e7dSPeter Dunlap * will be handled by iscsitd. 923a6d42e7dSPeter Dunlap */ 924a6d42e7dSPeter Dunlap iscsit_deferred_dispatch(rx_pdu); 925a6d42e7dSPeter Dunlap break; 926a6d42e7dSPeter Dunlap default: 927a6d42e7dSPeter Dunlap /* Protocol error */ 928a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 929a6d42e7dSPeter Dunlap idm_conn_event(ic, CE_TRANSPORT_FAIL, NULL); 930a6d42e7dSPeter Dunlap break; 931a6d42e7dSPeter Dunlap } 932a6d42e7dSPeter Dunlap } 933a6d42e7dSPeter Dunlap 934a6d42e7dSPeter Dunlap /*ARGSUSED*/ 935a6d42e7dSPeter Dunlap void 936a6d42e7dSPeter Dunlap iscsit_rx_pdu_error(idm_conn_t *ic, idm_pdu_t *rx_pdu, idm_status_t status) 937a6d42e7dSPeter Dunlap { 938a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 939a6d42e7dSPeter Dunlap } 940a6d42e7dSPeter Dunlap 941a6d42e7dSPeter Dunlap void 942a6d42e7dSPeter Dunlap iscsit_task_aborted(idm_task_t *idt, idm_status_t status) 943a6d42e7dSPeter Dunlap { 944a6d42e7dSPeter Dunlap iscsit_task_t *itask = idt->idt_private; 945a6d42e7dSPeter Dunlap 946a6d42e7dSPeter Dunlap switch (status) { 947a6d42e7dSPeter Dunlap case IDM_STATUS_SUSPENDED: 948a6d42e7dSPeter Dunlap break; 949a6d42e7dSPeter Dunlap case IDM_STATUS_ABORTED: 950a6d42e7dSPeter Dunlap mutex_enter(&itask->it_mutex); 951a6d42e7dSPeter Dunlap itask->it_aborted = B_TRUE; 952bf604c64SPeter Dunlap /* 953bf604c64SPeter Dunlap * We rely on the fact that STMF tracks outstanding 954bf604c64SPeter Dunlap * buffer transfers and will free all of our buffers 955bf604c64SPeter Dunlap * before freeing the task so we don't need to 956bf604c64SPeter Dunlap * explicitly free the buffers from iscsit/idm 957bf604c64SPeter Dunlap */ 958a6d42e7dSPeter Dunlap if (itask->it_stmf_abort) { 959a6d42e7dSPeter Dunlap mutex_exit(&itask->it_mutex); 96072cf3143Speter dunlap /* 96172cf3143Speter dunlap * Task is no longer active 96272cf3143Speter dunlap */ 96372cf3143Speter dunlap iscsit_task_done(itask); 96472cf3143Speter dunlap 965a6d42e7dSPeter Dunlap /* 966bf604c64SPeter Dunlap * STMF has already asked for this task to be aborted 967bf604c64SPeter Dunlap * 968a6d42e7dSPeter Dunlap * STMF specification is wrong... says to return 969a6d42e7dSPeter Dunlap * STMF_ABORTED, the code actually looks for 970a6d42e7dSPeter Dunlap * STMF_ABORT_SUCCESS. 971a6d42e7dSPeter Dunlap */ 972a6d42e7dSPeter Dunlap stmf_task_lport_aborted(itask->it_stmf_task, 973a6d42e7dSPeter Dunlap STMF_ABORT_SUCCESS, STMF_IOF_LPORT_DONE); 974a6d42e7dSPeter Dunlap return; 975a6d42e7dSPeter Dunlap } else { 976a6d42e7dSPeter Dunlap mutex_exit(&itask->it_mutex); 977a6d42e7dSPeter Dunlap /* 978bf604c64SPeter Dunlap * Tell STMF to stop processing the task. 979a6d42e7dSPeter Dunlap */ 980a6d42e7dSPeter Dunlap stmf_abort(STMF_QUEUE_TASK_ABORT, itask->it_stmf_task, 981a6d42e7dSPeter Dunlap STMF_ABORTED, NULL); 982a6d42e7dSPeter Dunlap return; 983a6d42e7dSPeter Dunlap } 984a6d42e7dSPeter Dunlap /*NOTREACHED*/ 985a6d42e7dSPeter Dunlap default: 986a6d42e7dSPeter Dunlap ASSERT(0); 987a6d42e7dSPeter Dunlap } 988a6d42e7dSPeter Dunlap } 989a6d42e7dSPeter Dunlap 990a6d42e7dSPeter Dunlap /*ARGSUSED*/ 991a6d42e7dSPeter Dunlap idm_status_t 992a6d42e7dSPeter Dunlap iscsit_client_notify(idm_conn_t *ic, idm_client_notify_t icn, 993a6d42e7dSPeter Dunlap uintptr_t data) 994a6d42e7dSPeter Dunlap { 995a6d42e7dSPeter Dunlap idm_status_t rc = IDM_STATUS_SUCCESS; 996a6d42e7dSPeter Dunlap 997a6d42e7dSPeter Dunlap /* 998a6d42e7dSPeter Dunlap * IDM client notifications will never occur at interrupt level 999a6d42e7dSPeter Dunlap * since they are generated from the connection state machine which 1000a6d42e7dSPeter Dunlap * running on taskq threads. 1001a6d42e7dSPeter Dunlap * 1002a6d42e7dSPeter Dunlap */ 1003a6d42e7dSPeter Dunlap switch (icn) { 1004a6d42e7dSPeter Dunlap case CN_CONNECT_ACCEPT: 1005a6d42e7dSPeter Dunlap rc = iscsit_conn_accept(ic); /* No data */ 1006a6d42e7dSPeter Dunlap break; 1007a6d42e7dSPeter Dunlap case CN_FFP_ENABLED: 1008a6d42e7dSPeter Dunlap rc = iscsit_ffp_enabled(ic); /* No data */ 1009a6d42e7dSPeter Dunlap break; 1010a6d42e7dSPeter Dunlap case CN_FFP_DISABLED: 1011a6d42e7dSPeter Dunlap /* 1012a6d42e7dSPeter Dunlap * Data indicates whether this was the result of an 1013a6d42e7dSPeter Dunlap * explicit logout request. 1014a6d42e7dSPeter Dunlap */ 1015a6d42e7dSPeter Dunlap rc = iscsit_ffp_disabled(ic, (idm_ffp_disable_t)data); 1016a6d42e7dSPeter Dunlap break; 1017a6d42e7dSPeter Dunlap case CN_CONNECT_LOST: 1018a6d42e7dSPeter Dunlap rc = iscsit_conn_lost(ic); 1019a6d42e7dSPeter Dunlap break; 1020a6d42e7dSPeter Dunlap case CN_CONNECT_DESTROY: 1021a6d42e7dSPeter Dunlap rc = iscsit_conn_destroy(ic); 1022a6d42e7dSPeter Dunlap break; 1023a6d42e7dSPeter Dunlap case CN_LOGIN_FAIL: 1024a6d42e7dSPeter Dunlap /* 1025a6d42e7dSPeter Dunlap * Force the login state machine to completion 1026a6d42e7dSPeter Dunlap */ 1027a6d42e7dSPeter Dunlap rc = iscsit_login_fail(ic); 1028a6d42e7dSPeter Dunlap break; 1029a6d42e7dSPeter Dunlap default: 1030a6d42e7dSPeter Dunlap rc = IDM_STATUS_REJECT; 1031a6d42e7dSPeter Dunlap break; 1032a6d42e7dSPeter Dunlap } 1033a6d42e7dSPeter Dunlap 1034a6d42e7dSPeter Dunlap return (rc); 1035a6d42e7dSPeter Dunlap } 1036a6d42e7dSPeter Dunlap 103760220f10SPriya Krishnan /* 103860220f10SPriya Krishnan * iscsit_update_statsn is invoked for all the PDUs which have the StatSN 103960220f10SPriya Krishnan * field in the header. The StatSN is incremented if the IDM_PDU_ADVANCE_STATSN 104060220f10SPriya Krishnan * flag is set in the pdu flags field. The StatSN is connection-wide and is 104160220f10SPriya Krishnan * protected by the mutex ict_statsn_mutex. For Data-In PDUs, if the flag 104260220f10SPriya Krishnan * IDM_TASK_PHASECOLLAPSE_REQ is set, the status (phase-collapse) is also filled 104360220f10SPriya Krishnan */ 104460220f10SPriya Krishnan void 104560220f10SPriya Krishnan iscsit_update_statsn(idm_task_t *idm_task, idm_pdu_t *pdu) 104660220f10SPriya Krishnan { 104760220f10SPriya Krishnan iscsi_scsi_rsp_hdr_t *rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 104860220f10SPriya Krishnan iscsit_conn_t *ict = (iscsit_conn_t *)pdu->isp_ic->ic_handle; 104960220f10SPriya Krishnan iscsit_task_t *itask = NULL; 105060220f10SPriya Krishnan scsi_task_t *task = NULL; 105160220f10SPriya Krishnan 105260220f10SPriya Krishnan mutex_enter(&ict->ict_statsn_mutex); 105360220f10SPriya Krishnan rsp->statsn = htonl(ict->ict_statsn); 105460220f10SPriya Krishnan if (pdu->isp_flags & IDM_PDU_ADVANCE_STATSN) 105560220f10SPriya Krishnan ict->ict_statsn++; 105660220f10SPriya Krishnan mutex_exit(&ict->ict_statsn_mutex); 105760220f10SPriya Krishnan 105860220f10SPriya Krishnan /* 105960220f10SPriya Krishnan * The last SCSI Data PDU passed for a command may also contain the 106060220f10SPriya Krishnan * status if the status indicates termination with no expections, i.e. 106160220f10SPriya Krishnan * no sense data or response involved. If the command completes with 106260220f10SPriya Krishnan * an error, then the response and sense data will be sent in a 106360220f10SPriya Krishnan * separate iSCSI Response PDU. 106460220f10SPriya Krishnan */ 106560220f10SPriya Krishnan if ((idm_task) && (idm_task->idt_flags & IDM_TASK_PHASECOLLAPSE_REQ)) { 106660220f10SPriya Krishnan itask = idm_task->idt_private; 106760220f10SPriya Krishnan task = itask->it_stmf_task; 106860220f10SPriya Krishnan 106960220f10SPriya Krishnan rsp->cmd_status = task->task_scsi_status; 107060220f10SPriya Krishnan rsp->flags |= ISCSI_FLAG_DATA_STATUS; 107160220f10SPriya Krishnan if (task->task_status_ctrl & TASK_SCTRL_OVER) { 107260220f10SPriya Krishnan rsp->flags |= ISCSI_FLAG_CMD_OVERFLOW; 107360220f10SPriya Krishnan } else if (task->task_status_ctrl & TASK_SCTRL_UNDER) { 107460220f10SPriya Krishnan rsp->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 107560220f10SPriya Krishnan } 107660220f10SPriya Krishnan rsp->residual_count = htonl(task->task_resid); 1077a2383ac5SPriya Krishnan 1078a2383ac5SPriya Krishnan /* 1079a2383ac5SPriya Krishnan * Removing the task from the session task list 1080a2383ac5SPriya Krishnan * just before the status is sent in the last 1081a2383ac5SPriya Krishnan * Data PDU transfer 1082a2383ac5SPriya Krishnan */ 1083a2383ac5SPriya Krishnan iscsit_task_done(itask); 108460220f10SPriya Krishnan } 108560220f10SPriya Krishnan } 1086a6d42e7dSPeter Dunlap 1087a6d42e7dSPeter Dunlap void 1088a6d42e7dSPeter Dunlap iscsit_build_hdr(idm_task_t *idm_task, idm_pdu_t *pdu, uint8_t opcode) 1089a6d42e7dSPeter Dunlap { 1090a6d42e7dSPeter Dunlap iscsit_task_t *itask = idm_task->idt_private; 1091a6d42e7dSPeter Dunlap iscsi_data_rsp_hdr_t *dh = (iscsi_data_rsp_hdr_t *)pdu->isp_hdr; 1092a6d42e7dSPeter Dunlap 1093a6d42e7dSPeter Dunlap /* 1094*d618d68dSPriya Krishnan * We acquired iscsit_sess_t.ist_sn_mutex in iscsit_xfer_scsi_data 1095a6d42e7dSPeter Dunlap */ 1096*d618d68dSPriya Krishnan ASSERT(MUTEX_HELD(&itask->it_ict->ict_sess->ist_sn_mutex)); 1097a6d42e7dSPeter Dunlap /* 1098a6d42e7dSPeter Dunlap * Lun is only required if the opcode == ISCSI_OP_SCSI_DATA_RSP 1099a6d42e7dSPeter Dunlap * and the 'A' bit is to be set 1100a6d42e7dSPeter Dunlap */ 1101a6d42e7dSPeter Dunlap dh->opcode = opcode; 1102a6d42e7dSPeter Dunlap dh->itt = itask->it_itt; 1103a6d42e7dSPeter Dunlap dh->ttt = itask->it_ttt; 110460220f10SPriya Krishnan 1105a6d42e7dSPeter Dunlap dh->expcmdsn = htonl(itask->it_ict->ict_sess->ist_expcmdsn); 1106a6d42e7dSPeter Dunlap dh->maxcmdsn = htonl(itask->it_ict->ict_sess->ist_maxcmdsn); 1107a6d42e7dSPeter Dunlap 1108a6d42e7dSPeter Dunlap /* 1109a6d42e7dSPeter Dunlap * IDM must set: 1110a6d42e7dSPeter Dunlap * 1111a6d42e7dSPeter Dunlap * data.flags and rtt.flags 1112a6d42e7dSPeter Dunlap * data.dlength 1113a6d42e7dSPeter Dunlap * data.datasn 1114a6d42e7dSPeter Dunlap * data.offset 111560220f10SPriya Krishnan * statsn, residual_count and cmd_status (for phase collapse) 1116a6d42e7dSPeter Dunlap * rtt.rttsn 1117a6d42e7dSPeter Dunlap * rtt.data_offset 1118a6d42e7dSPeter Dunlap * rtt.data_length 1119a6d42e7dSPeter Dunlap */ 1120a6d42e7dSPeter Dunlap } 1121a6d42e7dSPeter Dunlap 112272cf3143Speter dunlap void 112372cf3143Speter dunlap iscsit_keepalive(idm_conn_t *ic) 112472cf3143Speter dunlap { 112572cf3143Speter dunlap idm_pdu_t *nop_in_pdu; 112672cf3143Speter dunlap iscsi_nop_in_hdr_t *nop_in; 112772cf3143Speter dunlap iscsit_conn_t *ict = ic->ic_handle; 112872cf3143Speter dunlap 112972cf3143Speter dunlap /* 113072cf3143Speter dunlap * IDM noticed the connection has been idle for too long so it's 113172cf3143Speter dunlap * time to provoke some activity. Build and transmit an iSCSI 113272cf3143Speter dunlap * nop-in PDU -- when the initiator responds it will be counted 113372cf3143Speter dunlap * as "activity" and keep the connection alive. 113472cf3143Speter dunlap * 113572cf3143Speter dunlap * We don't actually care about the response here at the iscsit level 113672cf3143Speter dunlap * so we will just throw it away without looking at it when it arrives. 113772cf3143Speter dunlap */ 113872cf3143Speter dunlap nop_in_pdu = idm_pdu_alloc(sizeof (*nop_in), 0); 113972cf3143Speter dunlap idm_pdu_init(nop_in_pdu, ic, NULL, NULL); 114072cf3143Speter dunlap nop_in = (iscsi_nop_in_hdr_t *)nop_in_pdu->isp_hdr; 114172cf3143Speter dunlap bzero(nop_in, sizeof (*nop_in)); 114272cf3143Speter dunlap nop_in->opcode = ISCSI_OP_NOOP_IN; 114372cf3143Speter dunlap nop_in->flags = ISCSI_FLAG_FINAL; 114472cf3143Speter dunlap nop_in->itt = ISCSI_RSVD_TASK_TAG; 114560220f10SPriya Krishnan /* 114660220f10SPriya Krishnan * When the target sends a NOP-In as a Ping, the target transfer tag 114760220f10SPriya Krishnan * is set to a valid (not reserved) value and the initiator task tag 114860220f10SPriya Krishnan * is set to ISCSI_RSVD_TASK_TAG (0xffffffff). In this case the StatSN 114960220f10SPriya Krishnan * will always contain the next sequence number but the StatSN for the 115060220f10SPriya Krishnan * connection is not advanced after this PDU is sent. 115160220f10SPriya Krishnan */ 115260220f10SPriya Krishnan nop_in_pdu->isp_flags |= IDM_PDU_SET_STATSN; 115372cf3143Speter dunlap /* 115472cf3143Speter dunlap * This works because we don't currently allocate ttt's anywhere else 115572cf3143Speter dunlap * in iscsit so as long as we stay out of IDM's range we are safe. 115672cf3143Speter dunlap * If we need to allocate ttt's for other PDU's in the future this will 115772cf3143Speter dunlap * need to be improved. 115872cf3143Speter dunlap */ 115972cf3143Speter dunlap mutex_enter(&ict->ict_mutex); 116072cf3143Speter dunlap nop_in->ttt = ict->ict_keepalive_ttt; 116172cf3143Speter dunlap ict->ict_keepalive_ttt++; 116272cf3143Speter dunlap if (ict->ict_keepalive_ttt == ISCSI_RSVD_TASK_TAG) 116372cf3143Speter dunlap ict->ict_keepalive_ttt = IDM_TASKIDS_MAX; 116472cf3143Speter dunlap mutex_exit(&ict->ict_mutex); 116572cf3143Speter dunlap 116672cf3143Speter dunlap iscsit_pdu_tx(nop_in_pdu); 116772cf3143Speter dunlap } 116872cf3143Speter dunlap 1169a6d42e7dSPeter Dunlap static idm_status_t 1170a6d42e7dSPeter Dunlap iscsit_conn_accept(idm_conn_t *ic) 1171a6d42e7dSPeter Dunlap { 1172a6d42e7dSPeter Dunlap iscsit_conn_t *ict; 1173a6d42e7dSPeter Dunlap 117430e7468fSPeter Dunlap /* 117530e7468fSPeter Dunlap * We need to get a global hold here to ensure that the service 117630e7468fSPeter Dunlap * doesn't get shutdown prior to establishing a session. This 117730e7468fSPeter Dunlap * gets released in iscsit_conn_destroy(). 117830e7468fSPeter Dunlap */ 11798c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 1180e42a0851Speter dunlap if (iscsit_global.global_svc_state != ISE_ENABLED) { 11818c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 1182e42a0851Speter dunlap return (IDM_STATUS_FAIL); 1183e42a0851Speter dunlap } 118430e7468fSPeter Dunlap iscsit_global_hold(); 11858c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 118630e7468fSPeter Dunlap 1187a6d42e7dSPeter Dunlap /* 1188a6d42e7dSPeter Dunlap * Allocate an associated iscsit structure to represent this 1189a6d42e7dSPeter Dunlap * connection. We shouldn't really create a session until we 1190a6d42e7dSPeter Dunlap * get the first login PDU. 1191a6d42e7dSPeter Dunlap */ 1192a6d42e7dSPeter Dunlap ict = kmem_zalloc(sizeof (*ict), KM_SLEEP); 1193a6d42e7dSPeter Dunlap 1194a6d42e7dSPeter Dunlap ict->ict_ic = ic; 1195a6d42e7dSPeter Dunlap ict->ict_statsn = 1; 119672cf3143Speter dunlap ict->ict_keepalive_ttt = IDM_TASKIDS_MAX; /* Avoid IDM TT range */ 1197a6d42e7dSPeter Dunlap ic->ic_handle = ict; 1198a6d42e7dSPeter Dunlap mutex_init(&ict->ict_mutex, NULL, MUTEX_DRIVER, NULL); 119960220f10SPriya Krishnan mutex_init(&ict->ict_statsn_mutex, NULL, MUTEX_DRIVER, NULL); 1200a6d42e7dSPeter Dunlap idm_refcnt_init(&ict->ict_refcnt, ict); 1201a6d42e7dSPeter Dunlap 1202a6d42e7dSPeter Dunlap /* 1203a6d42e7dSPeter Dunlap * Initialize login state machine 1204a6d42e7dSPeter Dunlap */ 1205a6d42e7dSPeter Dunlap if (iscsit_login_sm_init(ict) != IDM_STATUS_SUCCESS) { 1206e42a0851Speter dunlap iscsit_global_rele(); 12074142b486SJames Moore /* 12084142b486SJames Moore * Cleanup the ict after idm notifies us about this failure 12094142b486SJames Moore */ 1210a6d42e7dSPeter Dunlap return (IDM_STATUS_FAIL); 1211a6d42e7dSPeter Dunlap } 1212a6d42e7dSPeter Dunlap 1213a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1214a6d42e7dSPeter Dunlap } 1215a6d42e7dSPeter Dunlap 1216a6d42e7dSPeter Dunlap idm_status_t 1217a6d42e7dSPeter Dunlap iscsit_conn_reinstate(iscsit_conn_t *reinstate_ict, iscsit_conn_t *new_ict) 1218a6d42e7dSPeter Dunlap { 1219a6d42e7dSPeter Dunlap idm_status_t result; 1220a6d42e7dSPeter Dunlap 1221a6d42e7dSPeter Dunlap /* 1222a6d42e7dSPeter Dunlap * Note in new connection state that this connection is 1223a6d42e7dSPeter Dunlap * reinstating an existing connection. 1224a6d42e7dSPeter Dunlap */ 1225a6d42e7dSPeter Dunlap new_ict->ict_reinstating = B_TRUE; 1226a6d42e7dSPeter Dunlap new_ict->ict_reinstate_conn = reinstate_ict; 1227a6d42e7dSPeter Dunlap new_ict->ict_statsn = reinstate_ict->ict_statsn; 1228a6d42e7dSPeter Dunlap 1229a6d42e7dSPeter Dunlap /* 1230a6d42e7dSPeter Dunlap * Now generate connection state machine event to existing connection 1231a6d42e7dSPeter Dunlap * so that it starts the cleanup process. 1232a6d42e7dSPeter Dunlap */ 1233a6d42e7dSPeter Dunlap result = idm_conn_reinstate_event(reinstate_ict->ict_ic, 1234a6d42e7dSPeter Dunlap new_ict->ict_ic); 1235a6d42e7dSPeter Dunlap 1236a6d42e7dSPeter Dunlap return (result); 1237a6d42e7dSPeter Dunlap } 1238a6d42e7dSPeter Dunlap 1239a6d42e7dSPeter Dunlap void 1240a6d42e7dSPeter Dunlap iscsit_conn_hold(iscsit_conn_t *ict) 1241a6d42e7dSPeter Dunlap { 1242a6d42e7dSPeter Dunlap idm_refcnt_hold(&ict->ict_refcnt); 1243a6d42e7dSPeter Dunlap } 1244a6d42e7dSPeter Dunlap 1245a6d42e7dSPeter Dunlap void 1246a6d42e7dSPeter Dunlap iscsit_conn_rele(iscsit_conn_t *ict) 1247a6d42e7dSPeter Dunlap { 1248a6d42e7dSPeter Dunlap idm_refcnt_rele(&ict->ict_refcnt); 1249a6d42e7dSPeter Dunlap } 1250a6d42e7dSPeter Dunlap 1251a6d42e7dSPeter Dunlap void 1252a6d42e7dSPeter Dunlap iscsit_conn_dispatch_hold(iscsit_conn_t *ict) 1253a6d42e7dSPeter Dunlap { 1254a6d42e7dSPeter Dunlap idm_refcnt_hold(&ict->ict_dispatch_refcnt); 1255a6d42e7dSPeter Dunlap } 1256a6d42e7dSPeter Dunlap 1257a6d42e7dSPeter Dunlap void 1258a6d42e7dSPeter Dunlap iscsit_conn_dispatch_rele(iscsit_conn_t *ict) 1259a6d42e7dSPeter Dunlap { 1260a6d42e7dSPeter Dunlap idm_refcnt_rele(&ict->ict_dispatch_refcnt); 1261a6d42e7dSPeter Dunlap } 1262a6d42e7dSPeter Dunlap 1263a6d42e7dSPeter Dunlap static idm_status_t 1264a6d42e7dSPeter Dunlap iscsit_login_fail(idm_conn_t *ic) 1265a6d42e7dSPeter Dunlap { 1266a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1267a6d42e7dSPeter Dunlap 1268a6d42e7dSPeter Dunlap /* Generate login state machine event */ 1269a6d42e7dSPeter Dunlap iscsit_login_sm_event(ict, ILE_LOGIN_CONN_ERROR, NULL); 1270a6d42e7dSPeter Dunlap 1271a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1272a6d42e7dSPeter Dunlap } 1273a6d42e7dSPeter Dunlap 1274a6d42e7dSPeter Dunlap static idm_status_t 1275a6d42e7dSPeter Dunlap iscsit_ffp_enabled(idm_conn_t *ic) 1276a6d42e7dSPeter Dunlap { 1277a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1278a6d42e7dSPeter Dunlap 1279a6d42e7dSPeter Dunlap /* Generate session state machine event */ 1280a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_LOGGED_IN, ict); 1281a6d42e7dSPeter Dunlap 1282a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1283a6d42e7dSPeter Dunlap } 1284a6d42e7dSPeter Dunlap 1285a6d42e7dSPeter Dunlap static idm_status_t 1286a6d42e7dSPeter Dunlap iscsit_ffp_disabled(idm_conn_t *ic, idm_ffp_disable_t disable_class) 1287a6d42e7dSPeter Dunlap { 1288a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1289a6d42e7dSPeter Dunlap 1290a6d42e7dSPeter Dunlap /* Generate session state machine event */ 1291a6d42e7dSPeter Dunlap switch (disable_class) { 1292a6d42e7dSPeter Dunlap case FD_CONN_FAIL: 1293a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_FFP_FAIL, ict); 1294a6d42e7dSPeter Dunlap break; 1295a6d42e7dSPeter Dunlap case FD_CONN_LOGOUT: 1296a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_FFP_DISABLE, ict); 1297a6d42e7dSPeter Dunlap break; 1298a6d42e7dSPeter Dunlap case FD_SESS_LOGOUT: 1299a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_SESSION_CLOSE, ict); 1300a6d42e7dSPeter Dunlap break; 1301a6d42e7dSPeter Dunlap default: 1302a6d42e7dSPeter Dunlap ASSERT(0); 1303a6d42e7dSPeter Dunlap } 1304a6d42e7dSPeter Dunlap 1305a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1306a6d42e7dSPeter Dunlap } 1307a6d42e7dSPeter Dunlap 1308a6d42e7dSPeter Dunlap static idm_status_t 1309a6d42e7dSPeter Dunlap iscsit_conn_lost(idm_conn_t *ic) 1310a6d42e7dSPeter Dunlap { 1311*d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 1312*d618d68dSPriya Krishnan iscsit_sess_t *ist = ict->ict_sess; 1313*d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf; 1314*d618d68dSPriya Krishnan idm_pdu_t *rx_pdu; 1315*d618d68dSPriya Krishnan int i; 1316a6d42e7dSPeter Dunlap 1317a6d42e7dSPeter Dunlap mutex_enter(&ict->ict_mutex); 1318a6d42e7dSPeter Dunlap ict->ict_lost = B_TRUE; 1319a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 1320*d618d68dSPriya Krishnan /* 1321*d618d68dSPriya Krishnan * scrub the staging queue for all PDUs on this connection 1322*d618d68dSPriya Krishnan */ 1323*d618d68dSPriya Krishnan if (ist != NULL) { 1324*d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 1325*d618d68dSPriya Krishnan for (cbuf = ist->ist_rxpdu_queue, i = 0; 1326*d618d68dSPriya Krishnan ((cbuf->cb_num_elems > 0) && (i < ISCSIT_RXPDU_QUEUE_LEN)); 1327*d618d68dSPriya Krishnan i++) { 1328*d618d68dSPriya Krishnan if (((rx_pdu = cbuf->cb_buffer[i]) != NULL) && 1329*d618d68dSPriya Krishnan (rx_pdu->isp_ic == ic)) { 1330*d618d68dSPriya Krishnan /* conn is lost, drop the pdu */ 1331*d618d68dSPriya Krishnan DTRACE_PROBE3(scrubbing__staging__queue, 1332*d618d68dSPriya Krishnan iscsit_sess_t *, ist, idm_conn_t *, ic, 1333*d618d68dSPriya Krishnan idm_pdu_t *, rx_pdu); 1334*d618d68dSPriya Krishnan idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 1335*d618d68dSPriya Krishnan cbuf->cb_buffer[i] = NULL; 1336*d618d68dSPriya Krishnan cbuf->cb_num_elems--; 1337*d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); 1338*d618d68dSPriya Krishnan } 1339*d618d68dSPriya Krishnan } 1340*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 1341*d618d68dSPriya Krishnan } 1342a6d42e7dSPeter Dunlap /* 1343a6d42e7dSPeter Dunlap * Make sure there aren't any PDU's transitioning from the receive 1344a6d42e7dSPeter Dunlap * handler to the dispatch taskq. 1345a6d42e7dSPeter Dunlap */ 1346a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&ict->ict_dispatch_refcnt); 1347a6d42e7dSPeter Dunlap 1348a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1349a6d42e7dSPeter Dunlap } 1350a6d42e7dSPeter Dunlap 1351a6d42e7dSPeter Dunlap static idm_status_t 1352a6d42e7dSPeter Dunlap iscsit_conn_destroy(idm_conn_t *ic) 1353a6d42e7dSPeter Dunlap { 1354a6d42e7dSPeter Dunlap iscsit_conn_t *ict = ic->ic_handle; 1355a6d42e7dSPeter Dunlap 1356a6d42e7dSPeter Dunlap mutex_enter(&ict->ict_mutex); 1357a6d42e7dSPeter Dunlap ict->ict_destroyed = B_TRUE; 1358a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 1359a6d42e7dSPeter Dunlap 1360a6d42e7dSPeter Dunlap /* Generate session state machine event */ 1361a6d42e7dSPeter Dunlap if (ict->ict_sess != NULL) { 1362a6d42e7dSPeter Dunlap /* 1363a6d42e7dSPeter Dunlap * Session state machine will call iscsit_conn_destroy_done() 1364a6d42e7dSPeter Dunlap * when it has removed references to this connection. 1365a6d42e7dSPeter Dunlap */ 1366a6d42e7dSPeter Dunlap iscsit_sess_sm_event(ict->ict_sess, SE_CONN_FAIL, ict); 1367a6d42e7dSPeter Dunlap } 1368a6d42e7dSPeter Dunlap 1369a6d42e7dSPeter Dunlap ict->ict_ic = NULL; 1370a6d42e7dSPeter Dunlap 1371a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&ict->ict_refcnt); 1372a6d42e7dSPeter Dunlap 13734142b486SJames Moore /* Reap the login state machine */ 13744142b486SJames Moore iscsit_login_sm_fini(ict); 13754142b486SJames Moore 13764142b486SJames Moore /* Clean up any text command remnants */ 13774142b486SJames Moore iscsit_text_cmd_fini(ict); 13784142b486SJames Moore 1379a6d42e7dSPeter Dunlap mutex_destroy(&ict->ict_mutex); 1380a6d42e7dSPeter Dunlap idm_refcnt_destroy(&ict->ict_refcnt); 1381a6d42e7dSPeter Dunlap kmem_free(ict, sizeof (*ict)); 1382a6d42e7dSPeter Dunlap 138330e7468fSPeter Dunlap iscsit_global_rele(); 138430e7468fSPeter Dunlap 1385a6d42e7dSPeter Dunlap return (IDM_STATUS_SUCCESS); 1386a6d42e7dSPeter Dunlap } 1387a6d42e7dSPeter Dunlap 1388a6d42e7dSPeter Dunlap /* 1389a6d42e7dSPeter Dunlap * STMF-related functions 1390a6d42e7dSPeter Dunlap * 1391a6d42e7dSPeter Dunlap * iSCSI to STMF mapping 1392a6d42e7dSPeter Dunlap * 1393a6d42e7dSPeter Dunlap * Session == ? 1394a6d42e7dSPeter Dunlap * Connection == bound to local port but not itself a local port 1395a6d42e7dSPeter Dunlap * Target 1396a6d42e7dSPeter Dunlap * Target portal (group?) == local port (really but we're not going to do this) 1397a6d42e7dSPeter Dunlap * iscsit needs to map connections to local ports (whatever we decide 1398a6d42e7dSPeter Dunlap * they are) 1399a6d42e7dSPeter Dunlap * Target == ? 1400a6d42e7dSPeter Dunlap */ 1401a6d42e7dSPeter Dunlap 1402a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1403a6d42e7dSPeter Dunlap static stmf_data_buf_t * 1404a6d42e7dSPeter Dunlap iscsit_dbuf_alloc(scsi_task_t *task, uint32_t size, uint32_t *pminsize, 1405a6d42e7dSPeter Dunlap uint32_t flags) 1406a6d42e7dSPeter Dunlap { 1407a6d42e7dSPeter Dunlap iscsit_task_t *itask = task->task_port_private; 1408a6d42e7dSPeter Dunlap idm_buf_t *idm_buffer; 1409a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf; 1410a6d42e7dSPeter Dunlap stmf_data_buf_t *result; 141126ec4a22SPriya Krishnan uint32_t bsize; 1412a6d42e7dSPeter Dunlap 1413a6d42e7dSPeter Dunlap /* 141401c0a610SPriya Krishnan * If the requested size is larger than MaxBurstLength and the 141501c0a610SPriya Krishnan * given pminsize is also larger than MaxBurstLength, then the 141601c0a610SPriya Krishnan * allocation fails (dbuf = NULL) and pminsize is modified to 141701c0a610SPriya Krishnan * be equal to MaxBurstLength. stmf/sbd then should re-invoke 141801c0a610SPriya Krishnan * this function with the corrected values for transfer. 1419a6d42e7dSPeter Dunlap */ 142026ec4a22SPriya Krishnan ASSERT(pminsize); 142101c0a610SPriya Krishnan if (size <= itask->it_ict->ict_op.op_max_burst_length) { 142201c0a610SPriya Krishnan bsize = size; 142301c0a610SPriya Krishnan } else if (*pminsize <= itask->it_ict->ict_op.op_max_burst_length) { 142401c0a610SPriya Krishnan bsize = itask->it_ict->ict_op.op_max_burst_length; 142501c0a610SPriya Krishnan } else { 1426a6d42e7dSPeter Dunlap *pminsize = itask->it_ict->ict_op.op_max_burst_length; 1427a6d42e7dSPeter Dunlap return (NULL); 1428a6d42e7dSPeter Dunlap } 1429a6d42e7dSPeter Dunlap 1430a6d42e7dSPeter Dunlap /* Alloc buffer */ 143126ec4a22SPriya Krishnan idm_buffer = idm_buf_alloc(itask->it_ict->ict_ic, NULL, bsize); 1432a6d42e7dSPeter Dunlap if (idm_buffer != NULL) { 1433a6d42e7dSPeter Dunlap result = stmf_alloc(STMF_STRUCT_DATA_BUF, 1434a6d42e7dSPeter Dunlap sizeof (iscsit_buf_t), 0); 1435a6d42e7dSPeter Dunlap if (result != NULL) { 1436a6d42e7dSPeter Dunlap /* Fill in stmf_data_buf_t */ 1437a6d42e7dSPeter Dunlap ibuf = result->db_port_private; 1438a6d42e7dSPeter Dunlap ibuf->ibuf_idm_buf = idm_buffer; 1439a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf = result; 1440a6d42e7dSPeter Dunlap ibuf->ibuf_is_immed = B_FALSE; 1441a6d42e7dSPeter Dunlap result->db_flags = DB_DONT_CACHE; 144226ec4a22SPriya Krishnan result->db_buf_size = bsize; 144326ec4a22SPriya Krishnan result->db_data_size = bsize; 1444a6d42e7dSPeter Dunlap result->db_sglist_length = 1; 1445a6d42e7dSPeter Dunlap result->db_sglist[0].seg_addr = idm_buffer->idb_buf; 1446a6d42e7dSPeter Dunlap result->db_sglist[0].seg_length = 1447a6d42e7dSPeter Dunlap idm_buffer->idb_buflen; 1448a6d42e7dSPeter Dunlap return (result); 1449a6d42e7dSPeter Dunlap } 1450a6d42e7dSPeter Dunlap 1451a6d42e7dSPeter Dunlap /* Couldn't get the stmf_data_buf_t so free the buffer */ 1452a6d42e7dSPeter Dunlap idm_buf_free(idm_buffer); 1453a6d42e7dSPeter Dunlap } 1454a6d42e7dSPeter Dunlap 1455a6d42e7dSPeter Dunlap return (NULL); 1456a6d42e7dSPeter Dunlap } 1457a6d42e7dSPeter Dunlap 1458a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1459a6d42e7dSPeter Dunlap static void 1460a6d42e7dSPeter Dunlap iscsit_dbuf_free(stmf_dbuf_store_t *ds, stmf_data_buf_t *dbuf) 1461a6d42e7dSPeter Dunlap { 1462a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf = dbuf->db_port_private; 1463a6d42e7dSPeter Dunlap 1464a6d42e7dSPeter Dunlap if (ibuf->ibuf_is_immed) { 1465a6d42e7dSPeter Dunlap /* 1466a6d42e7dSPeter Dunlap * The iscsit_buf_t structure itself will be freed with its 1467a6d42e7dSPeter Dunlap * associated task. Here we just need to free the PDU that 1468a6d42e7dSPeter Dunlap * held the immediate data. 1469a6d42e7dSPeter Dunlap */ 1470a6d42e7dSPeter Dunlap idm_pdu_complete(ibuf->ibuf_immed_data_pdu, IDM_STATUS_SUCCESS); 1471a6d42e7dSPeter Dunlap ibuf->ibuf_immed_data_pdu = 0; 1472a6d42e7dSPeter Dunlap } else { 1473a6d42e7dSPeter Dunlap idm_buf_free(ibuf->ibuf_idm_buf); 1474a6d42e7dSPeter Dunlap stmf_free(dbuf); 1475a6d42e7dSPeter Dunlap } 1476a6d42e7dSPeter Dunlap } 1477a6d42e7dSPeter Dunlap 1478a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1479a6d42e7dSPeter Dunlap stmf_status_t 1480a6d42e7dSPeter Dunlap iscsit_xfer_scsi_data(scsi_task_t *task, stmf_data_buf_t *dbuf, 1481a6d42e7dSPeter Dunlap uint32_t ioflags) 1482a6d42e7dSPeter Dunlap { 1483a6d42e7dSPeter Dunlap iscsit_task_t *iscsit_task = task->task_port_private; 148460220f10SPriya Krishnan iscsit_sess_t *ict_sess = iscsit_task->it_ict->ict_sess; 1485a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf = dbuf->db_port_private; 1486a6d42e7dSPeter Dunlap int idm_rc; 1487a6d42e7dSPeter Dunlap 1488bf604c64SPeter Dunlap /* 1489bf604c64SPeter Dunlap * If we are aborting then we can ignore this request 1490bf604c64SPeter Dunlap */ 1491bf604c64SPeter Dunlap if (iscsit_task->it_stmf_abort) { 1492bf604c64SPeter Dunlap return (STMF_SUCCESS); 1493bf604c64SPeter Dunlap } 1494bf604c64SPeter Dunlap 1495a6d42e7dSPeter Dunlap /* 1496a6d42e7dSPeter Dunlap * If it's not immediate data then start the transfer 1497a6d42e7dSPeter Dunlap */ 1498a6d42e7dSPeter Dunlap ASSERT(ibuf->ibuf_is_immed == B_FALSE); 1499a6d42e7dSPeter Dunlap if (dbuf->db_flags & DB_DIRECTION_TO_RPORT) { 150060220f10SPriya Krishnan /* 150160220f10SPriya Krishnan * The DB_SEND_STATUS_GOOD flag in the STMF data buffer allows 150260220f10SPriya Krishnan * the port provider to phase-collapse, i.e. send the status 150360220f10SPriya Krishnan * along with the final data PDU for the command. The port 150460220f10SPriya Krishnan * provider passes this request to the transport layer by 150560220f10SPriya Krishnan * setting a flag IDM_TASK_PHASECOLLAPSE_REQ in the task. 150660220f10SPriya Krishnan */ 150760220f10SPriya Krishnan if (dbuf->db_flags & DB_SEND_STATUS_GOOD) 150860220f10SPriya Krishnan iscsit_task->it_idm_task->idt_flags |= 150960220f10SPriya Krishnan IDM_TASK_PHASECOLLAPSE_REQ; 1510a6d42e7dSPeter Dunlap /* 1511a6d42e7dSPeter Dunlap * IDM will call iscsit_build_hdr so lock now to serialize 1512a6d42e7dSPeter Dunlap * access to the SN values. We need to lock here to enforce 1513a6d42e7dSPeter Dunlap * lock ordering 1514a6d42e7dSPeter Dunlap */ 1515*d618d68dSPriya Krishnan mutex_enter(&ict_sess->ist_sn_mutex); 1516a6d42e7dSPeter Dunlap idm_rc = idm_buf_tx_to_ini(iscsit_task->it_idm_task, 1517a6d42e7dSPeter Dunlap ibuf->ibuf_idm_buf, dbuf->db_relative_offset, 1518a6d42e7dSPeter Dunlap dbuf->db_data_size, &iscsit_buf_xfer_cb, dbuf); 1519*d618d68dSPriya Krishnan mutex_exit(&ict_sess->ist_sn_mutex); 1520a6d42e7dSPeter Dunlap 1521a6d42e7dSPeter Dunlap return (iscsit_idm_to_stmf(idm_rc)); 1522a6d42e7dSPeter Dunlap } else if (dbuf->db_flags & DB_DIRECTION_FROM_RPORT) { 1523a6d42e7dSPeter Dunlap /* Grab the SN lock (see comment above) */ 1524*d618d68dSPriya Krishnan mutex_enter(&ict_sess->ist_sn_mutex); 1525a6d42e7dSPeter Dunlap idm_rc = idm_buf_rx_from_ini(iscsit_task->it_idm_task, 1526a6d42e7dSPeter Dunlap ibuf->ibuf_idm_buf, dbuf->db_relative_offset, 1527a6d42e7dSPeter Dunlap dbuf->db_data_size, &iscsit_buf_xfer_cb, dbuf); 1528*d618d68dSPriya Krishnan mutex_exit(&ict_sess->ist_sn_mutex); 1529a6d42e7dSPeter Dunlap 1530a6d42e7dSPeter Dunlap return (iscsit_idm_to_stmf(idm_rc)); 1531a6d42e7dSPeter Dunlap } 1532a6d42e7dSPeter Dunlap 1533a6d42e7dSPeter Dunlap /* What are we supposed to do if there is no direction? */ 1534a6d42e7dSPeter Dunlap return (STMF_INVALID_ARG); 1535a6d42e7dSPeter Dunlap } 1536a6d42e7dSPeter Dunlap 1537a6d42e7dSPeter Dunlap static void 1538a6d42e7dSPeter Dunlap iscsit_buf_xfer_cb(idm_buf_t *idb, idm_status_t status) 1539a6d42e7dSPeter Dunlap { 1540a6d42e7dSPeter Dunlap iscsit_task_t *itask = idb->idb_task_binding->idt_private; 1541a6d42e7dSPeter Dunlap stmf_data_buf_t *dbuf = idb->idb_cb_arg; 1542a6d42e7dSPeter Dunlap 1543a6d42e7dSPeter Dunlap dbuf->db_xfer_status = iscsit_idm_to_stmf(status); 1544a6d42e7dSPeter Dunlap 1545bf604c64SPeter Dunlap /* 1546bf604c64SPeter Dunlap * If the task has been aborted then we don't need to call STMF 1547bf604c64SPeter Dunlap */ 1548bf604c64SPeter Dunlap if (itask->it_stmf_abort) { 1549bf604c64SPeter Dunlap return; 1550bf604c64SPeter Dunlap } 1551bf604c64SPeter Dunlap 1552a6d42e7dSPeter Dunlap /* 155360220f10SPriya Krishnan * For ISCSI over TCP (not iSER), the last SCSI Data PDU passed 155460220f10SPriya Krishnan * for a successful command contains the status as requested by 155560220f10SPriya Krishnan * by COMSTAR (via the DB_SEND_STATUS_GOOD flag). But the iSER 155660220f10SPriya Krishnan * transport does not support phase-collapse. So pretend we are 155760220f10SPriya Krishnan * COMSTAR and send the status in a separate PDU now. 1558a6d42e7dSPeter Dunlap */ 155960220f10SPriya Krishnan if (idb->idb_task_binding->idt_flags & IDM_TASK_PHASECOLLAPSE_SUCCESS) { 156060220f10SPriya Krishnan /* 1561a2383ac5SPriya Krishnan * Mark task complete and notify COMSTAR 1562a2383ac5SPriya Krishnan * that the status has been sent. 156360220f10SPriya Krishnan */ 156460220f10SPriya Krishnan itask->it_idm_task->idt_state = TASK_COMPLETE; 156560220f10SPriya Krishnan stmf_send_status_done(itask->it_stmf_task, 156660220f10SPriya Krishnan iscsit_idm_to_stmf(status), STMF_IOF_LPORT_DONE); 156760220f10SPriya Krishnan } else if ((dbuf->db_flags & DB_SEND_STATUS_GOOD) && 1568a6d42e7dSPeter Dunlap status == IDM_STATUS_SUCCESS) { 156960220f10SPriya Krishnan 1570a6d42e7dSPeter Dunlap /* 157170a38f02SPriya Krishnan * The iscsi target port provider - for iSER, emulates the 157270a38f02SPriya Krishnan * DB_SEND_STATUS_GOOD optimization if requested by STMF; 157370a38f02SPriya Krishnan * it sends the status in a separate PDU after the data 157470a38f02SPriya Krishnan * transfer. In this case the port provider should first 157570a38f02SPriya Krishnan * call stmf_data_xfer_done() to mark the transfer complete 157670a38f02SPriya Krishnan * and then send the status. Although STMF will free the 157770a38f02SPriya Krishnan * buffer at the time the task is freed, even if the transfer 157870a38f02SPriya Krishnan * is not marked complete, this behavior makes statistics 157970a38f02SPriya Krishnan * gathering and task state tracking more difficult than it 158070a38f02SPriya Krishnan * needs to be. 1581a6d42e7dSPeter Dunlap */ 158270a38f02SPriya Krishnan stmf_data_xfer_done(itask->it_stmf_task, dbuf, 0); 1583a6d42e7dSPeter Dunlap if (iscsit_send_scsi_status(itask->it_stmf_task, 0) 158463528ae4SJames Moore != STMF_SUCCESS) { 158570a38f02SPriya Krishnan stmf_send_status_done(itask->it_stmf_task, 158670a38f02SPriya Krishnan STMF_FAILURE, STMF_IOF_LPORT_DONE); 1587a6d42e7dSPeter Dunlap } 1588a6d42e7dSPeter Dunlap } else { 1589a6d42e7dSPeter Dunlap stmf_data_xfer_done(itask->it_stmf_task, dbuf, 0); 159070a38f02SPriya Krishnan /* don't touch dbuf after stmf_data_xfer_done */ 1591a6d42e7dSPeter Dunlap } 1592a6d42e7dSPeter Dunlap } 1593a6d42e7dSPeter Dunlap 1594bf604c64SPeter Dunlap 1595a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1596a6d42e7dSPeter Dunlap stmf_status_t 1597a6d42e7dSPeter Dunlap iscsit_send_scsi_status(scsi_task_t *task, uint32_t ioflags) 1598a6d42e7dSPeter Dunlap { 1599a6d42e7dSPeter Dunlap iscsit_task_t *itask = task->task_port_private; 1600a6d42e7dSPeter Dunlap iscsi_scsi_rsp_hdr_t *rsp; 1601a6d42e7dSPeter Dunlap idm_pdu_t *pdu; 1602a6d42e7dSPeter Dunlap int resp_datalen; 1603a6d42e7dSPeter Dunlap 1604a6d42e7dSPeter Dunlap /* 1605a6d42e7dSPeter Dunlap * If this task is aborted then we don't need to respond. 1606a6d42e7dSPeter Dunlap */ 1607a6d42e7dSPeter Dunlap if (itask->it_stmf_abort) { 1608a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1609a6d42e7dSPeter Dunlap } 1610a6d42e7dSPeter Dunlap 1611a6d42e7dSPeter Dunlap /* 1612a6d42e7dSPeter Dunlap * If this is a task management status, handle it elsewhere. 1613a6d42e7dSPeter Dunlap */ 1614a6d42e7dSPeter Dunlap if (task->task_mgmt_function != TM_NONE) { 1615a6d42e7dSPeter Dunlap /* 1616a6d42e7dSPeter Dunlap * Don't wait for the PDU completion to tell STMF 1617a6d42e7dSPeter Dunlap * the task is done -- it doesn't really matter and 1618a6d42e7dSPeter Dunlap * it makes life complicated if STMF later asks us to 1619a6d42e7dSPeter Dunlap * abort the request and we don't know whether the 1620a6d42e7dSPeter Dunlap * status has been sent or not. 1621a6d42e7dSPeter Dunlap */ 1622a6d42e7dSPeter Dunlap itask->it_tm_responded = B_TRUE; 1623a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(itask->it_tm_pdu, 1624a6d42e7dSPeter Dunlap (task->task_completion_status == STMF_SUCCESS) ? 1625a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_COMPLETE : SCSI_TCP_TM_RESP_FUNC_NOT_SUPP); 1626a6d42e7dSPeter Dunlap stmf_send_status_done(task, STMF_SUCCESS, 1627a6d42e7dSPeter Dunlap STMF_IOF_LPORT_DONE); 1628a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1629a6d42e7dSPeter Dunlap } 1630a6d42e7dSPeter Dunlap 163172cf3143Speter dunlap /* 163272cf3143Speter dunlap * Remove the task from the session task list 163372cf3143Speter dunlap */ 163472cf3143Speter dunlap iscsit_task_done(itask); 163572cf3143Speter dunlap 163672cf3143Speter dunlap /* 163772cf3143Speter dunlap * Send status 163872cf3143Speter dunlap */ 1639a6d42e7dSPeter Dunlap mutex_enter(&itask->it_idm_task->idt_mutex); 1640a6d42e7dSPeter Dunlap if ((itask->it_idm_task->idt_state == TASK_ACTIVE) && 1641a6d42e7dSPeter Dunlap (task->task_completion_status == STMF_SUCCESS) && 1642a6d42e7dSPeter Dunlap (task->task_sense_length == 0) && 1643a6d42e7dSPeter Dunlap (task->task_resid == 0)) { 1644a6d42e7dSPeter Dunlap itask->it_idm_task->idt_state = TASK_COMPLETE; 1645a6d42e7dSPeter Dunlap /* PDU callback releases task hold */ 1646a6d42e7dSPeter Dunlap idm_task_hold(itask->it_idm_task); 1647a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 1648a6d42e7dSPeter Dunlap /* 1649a6d42e7dSPeter Dunlap * Fast path. Cached status PDU's are already 1650a6d42e7dSPeter Dunlap * initialized. We just need to fill in 165160220f10SPriya Krishnan * connection and task information. StatSN is 165260220f10SPriya Krishnan * incremented by 1 for every status sent a 165360220f10SPriya Krishnan * connection. 1654a6d42e7dSPeter Dunlap */ 1655a6d42e7dSPeter Dunlap pdu = kmem_cache_alloc(iscsit_status_pdu_cache, KM_SLEEP); 1656a6d42e7dSPeter Dunlap pdu->isp_ic = itask->it_ict->ict_ic; 1657a6d42e7dSPeter Dunlap pdu->isp_private = itask; 165860220f10SPriya Krishnan pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 1659a6d42e7dSPeter Dunlap 1660a6d42e7dSPeter Dunlap rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 1661a6d42e7dSPeter Dunlap rsp->itt = itask->it_itt; 16621d7b78a3SPriya Krishnan /* 16631d7b78a3SPriya Krishnan * ExpDataSN is the number of R2T and Data-In (read) 16641d7b78a3SPriya Krishnan * PDUs the target has sent for the SCSI command. 16651d7b78a3SPriya Krishnan * 16661d7b78a3SPriya Krishnan * Since there is no support for bidirectional transfer 16671d7b78a3SPriya Krishnan * yet, either idt_exp_datasn or idt_exp_rttsn, but not 16681d7b78a3SPriya Krishnan * both is valid at any time 16691d7b78a3SPriya Krishnan */ 16701d7b78a3SPriya Krishnan rsp->expdatasn = (itask->it_idm_task->idt_exp_datasn != 0) ? 16711d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_datasn): 16721d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_rttsn); 1673a6d42e7dSPeter Dunlap rsp->cmd_status = task->task_scsi_status; 1674a6d42e7dSPeter Dunlap iscsit_pdu_tx(pdu); 1675a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1676a6d42e7dSPeter Dunlap } else { 1677a6d42e7dSPeter Dunlap if (itask->it_idm_task->idt_state != TASK_ACTIVE) { 1678a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 167963528ae4SJames Moore return (STMF_FAILURE); 1680a6d42e7dSPeter Dunlap } 1681a6d42e7dSPeter Dunlap itask->it_idm_task->idt_state = TASK_COMPLETE; 1682a6d42e7dSPeter Dunlap /* PDU callback releases task hold */ 1683a6d42e7dSPeter Dunlap idm_task_hold(itask->it_idm_task); 1684a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 1685a6d42e7dSPeter Dunlap 1686a6d42e7dSPeter Dunlap resp_datalen = (task->task_sense_length == 0) ? 0 : 1687a6d42e7dSPeter Dunlap (task->task_sense_length + sizeof (uint16_t)); 1688a6d42e7dSPeter Dunlap 1689a6d42e7dSPeter Dunlap pdu = idm_pdu_alloc(sizeof (iscsi_hdr_t), resp_datalen); 1690a6d42e7dSPeter Dunlap idm_pdu_init(pdu, itask->it_ict->ict_ic, itask, 1691a6d42e7dSPeter Dunlap iscsit_send_status_done); 169260220f10SPriya Krishnan pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 1693a6d42e7dSPeter Dunlap 1694a6d42e7dSPeter Dunlap rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 1695a6d42e7dSPeter Dunlap bzero(rsp, sizeof (*rsp)); 1696a6d42e7dSPeter Dunlap rsp->opcode = ISCSI_OP_SCSI_RSP; 1697a6d42e7dSPeter Dunlap 1698a6d42e7dSPeter Dunlap rsp->flags = ISCSI_FLAG_FINAL; 1699a6d42e7dSPeter Dunlap if (task->task_status_ctrl & TASK_SCTRL_OVER) { 1700a6d42e7dSPeter Dunlap rsp->flags |= ISCSI_FLAG_CMD_OVERFLOW; 1701a6d42e7dSPeter Dunlap } else if (task->task_status_ctrl & TASK_SCTRL_UNDER) { 1702a6d42e7dSPeter Dunlap rsp->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 1703a6d42e7dSPeter Dunlap } 1704a6d42e7dSPeter Dunlap 1705a6d42e7dSPeter Dunlap rsp->bi_residual_count = 0; 1706a6d42e7dSPeter Dunlap rsp->residual_count = htonl(task->task_resid); 1707a6d42e7dSPeter Dunlap rsp->itt = itask->it_itt; 1708a6d42e7dSPeter Dunlap rsp->response = ISCSI_STATUS_CMD_COMPLETED; 17091d7b78a3SPriya Krishnan rsp->expdatasn = (itask->it_idm_task->idt_exp_datasn != 0) ? 17101d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_datasn): 17111d7b78a3SPriya Krishnan htonl(itask->it_idm_task->idt_exp_rttsn); 1712a6d42e7dSPeter Dunlap rsp->cmd_status = task->task_scsi_status; 1713a6d42e7dSPeter Dunlap if (task->task_sense_length != 0) { 1714a6d42e7dSPeter Dunlap /* 1715a6d42e7dSPeter Dunlap * Add a byte to provide the sense length in 1716a6d42e7dSPeter Dunlap * the response 1717a6d42e7dSPeter Dunlap */ 1718a6d42e7dSPeter Dunlap *(uint16_t *)((void *)pdu->isp_data) = 1719a6d42e7dSPeter Dunlap htons(task->task_sense_length); 1720a6d42e7dSPeter Dunlap bcopy(task->task_sense_data, 1721a6d42e7dSPeter Dunlap (uint8_t *)pdu->isp_data + 1722a6d42e7dSPeter Dunlap sizeof (uint16_t), 1723a6d42e7dSPeter Dunlap task->task_sense_length); 1724a6d42e7dSPeter Dunlap hton24(rsp->dlength, resp_datalen); 1725a6d42e7dSPeter Dunlap } 1726a6d42e7dSPeter Dunlap 172730e7468fSPeter Dunlap DTRACE_PROBE5(iscsi__scsi__response, 172830e7468fSPeter Dunlap iscsit_conn_t *, itask->it_ict, 172930e7468fSPeter Dunlap uint8_t, rsp->response, 173030e7468fSPeter Dunlap uint8_t, rsp->cmd_status, 173130e7468fSPeter Dunlap idm_pdu_t *, pdu, 173230e7468fSPeter Dunlap scsi_task_t *, task); 173330e7468fSPeter Dunlap 1734a6d42e7dSPeter Dunlap iscsit_pdu_tx(pdu); 1735a6d42e7dSPeter Dunlap 1736a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1737a6d42e7dSPeter Dunlap } 1738a6d42e7dSPeter Dunlap } 1739a6d42e7dSPeter Dunlap 1740a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1741a6d42e7dSPeter Dunlap static void 1742a6d42e7dSPeter Dunlap iscsit_send_good_status_done(idm_pdu_t *pdu, idm_status_t status) 1743a6d42e7dSPeter Dunlap { 1744bf604c64SPeter Dunlap iscsit_task_t *itask; 1745bf604c64SPeter Dunlap boolean_t aborted; 1746a6d42e7dSPeter Dunlap 1747a6d42e7dSPeter Dunlap itask = pdu->isp_private; 1748bf604c64SPeter Dunlap aborted = itask->it_stmf_abort; 1749bf604c64SPeter Dunlap 1750bf604c64SPeter Dunlap /* 1751bf604c64SPeter Dunlap * After releasing the hold the task may be freed at any time so 1752bf604c64SPeter Dunlap * don't touch it. 1753bf604c64SPeter Dunlap */ 1754a6d42e7dSPeter Dunlap idm_task_rele(itask->it_idm_task); 1755bf604c64SPeter Dunlap if (!aborted) { 1756bf604c64SPeter Dunlap stmf_send_status_done(itask->it_stmf_task, 1757bf604c64SPeter Dunlap iscsit_idm_to_stmf(pdu->isp_status), STMF_IOF_LPORT_DONE); 1758bf604c64SPeter Dunlap } 1759a6d42e7dSPeter Dunlap kmem_cache_free(iscsit_status_pdu_cache, pdu); 1760a6d42e7dSPeter Dunlap } 1761a6d42e7dSPeter Dunlap 1762a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1763a6d42e7dSPeter Dunlap static void 1764a6d42e7dSPeter Dunlap iscsit_send_status_done(idm_pdu_t *pdu, idm_status_t status) 1765a6d42e7dSPeter Dunlap { 1766a6d42e7dSPeter Dunlap iscsit_task_t *itask; 1767bf604c64SPeter Dunlap boolean_t aborted; 1768a6d42e7dSPeter Dunlap 1769a6d42e7dSPeter Dunlap itask = pdu->isp_private; 1770bf604c64SPeter Dunlap aborted = itask->it_stmf_abort; 1771bf604c64SPeter Dunlap 1772bf604c64SPeter Dunlap /* 1773bf604c64SPeter Dunlap * After releasing the hold the task may be freed at any time so 1774bf604c64SPeter Dunlap * don't touch it. 1775bf604c64SPeter Dunlap */ 1776a6d42e7dSPeter Dunlap idm_task_rele(itask->it_idm_task); 1777bf604c64SPeter Dunlap if (!aborted) { 1778bf604c64SPeter Dunlap stmf_send_status_done(itask->it_stmf_task, 1779bf604c64SPeter Dunlap iscsit_idm_to_stmf(pdu->isp_status), STMF_IOF_LPORT_DONE); 1780bf604c64SPeter Dunlap } 1781a6d42e7dSPeter Dunlap idm_pdu_free(pdu); 1782a6d42e7dSPeter Dunlap } 1783a6d42e7dSPeter Dunlap 1784a6d42e7dSPeter Dunlap 1785a6d42e7dSPeter Dunlap void 1786a6d42e7dSPeter Dunlap iscsit_lport_task_free(scsi_task_t *task) 1787a6d42e7dSPeter Dunlap { 1788a6d42e7dSPeter Dunlap iscsit_task_t *itask = task->task_port_private; 1789a6d42e7dSPeter Dunlap 1790a6d42e7dSPeter Dunlap /* We only call idm_task_start for regular tasks, not task management */ 1791a6d42e7dSPeter Dunlap if (task->task_mgmt_function == TM_NONE) { 1792a6d42e7dSPeter Dunlap idm_task_done(itask->it_idm_task); 1793a6d42e7dSPeter Dunlap iscsit_task_free(itask); 1794a6d42e7dSPeter Dunlap return; 1795a6d42e7dSPeter Dunlap } else { 1796a6d42e7dSPeter Dunlap iscsit_tm_task_free(itask); 1797a6d42e7dSPeter Dunlap } 1798a6d42e7dSPeter Dunlap } 1799a6d42e7dSPeter Dunlap 1800a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1801a6d42e7dSPeter Dunlap stmf_status_t 1802a6d42e7dSPeter Dunlap iscsit_abort(stmf_local_port_t *lport, int abort_cmd, void *arg, uint32_t flags) 1803a6d42e7dSPeter Dunlap { 1804a6d42e7dSPeter Dunlap scsi_task_t *st = (scsi_task_t *)arg; 1805a6d42e7dSPeter Dunlap iscsit_task_t *iscsit_task; 1806a6d42e7dSPeter Dunlap idm_task_t *idt; 1807a6d42e7dSPeter Dunlap 1808a6d42e7dSPeter Dunlap /* 1809a6d42e7dSPeter Dunlap * If this is a task management request then there's really not much to 1810a6d42e7dSPeter Dunlap * do. 1811a6d42e7dSPeter Dunlap */ 1812a6d42e7dSPeter Dunlap if (st->task_mgmt_function != TM_NONE) { 1813a6d42e7dSPeter Dunlap return (STMF_ABORT_SUCCESS); 1814a6d42e7dSPeter Dunlap } 1815a6d42e7dSPeter Dunlap 1816a6d42e7dSPeter Dunlap /* 1817a6d42e7dSPeter Dunlap * Regular task, start cleaning up 1818a6d42e7dSPeter Dunlap */ 1819a6d42e7dSPeter Dunlap iscsit_task = st->task_port_private; 1820a6d42e7dSPeter Dunlap idt = iscsit_task->it_idm_task; 1821a6d42e7dSPeter Dunlap mutex_enter(&iscsit_task->it_mutex); 1822a6d42e7dSPeter Dunlap iscsit_task->it_stmf_abort = B_TRUE; 1823a6d42e7dSPeter Dunlap if (iscsit_task->it_aborted) { 1824a6d42e7dSPeter Dunlap mutex_exit(&iscsit_task->it_mutex); 182572cf3143Speter dunlap /* 182672cf3143Speter dunlap * Task is no longer active 182772cf3143Speter dunlap */ 182872cf3143Speter dunlap iscsit_task_done(iscsit_task); 182972cf3143Speter dunlap 1830a6d42e7dSPeter Dunlap /* 1831a6d42e7dSPeter Dunlap * STMF specification is wrong... says to return 1832a6d42e7dSPeter Dunlap * STMF_ABORTED, the code actually looks for 1833a6d42e7dSPeter Dunlap * STMF_ABORT_SUCCESS. 1834a6d42e7dSPeter Dunlap */ 1835a6d42e7dSPeter Dunlap return (STMF_ABORT_SUCCESS); 1836a6d42e7dSPeter Dunlap } else { 1837a6d42e7dSPeter Dunlap mutex_exit(&iscsit_task->it_mutex); 1838a6d42e7dSPeter Dunlap /* 1839a6d42e7dSPeter Dunlap * Call IDM to abort the task. Due to a variety of 1840a6d42e7dSPeter Dunlap * circumstances the task may already be in the process of 1841a6d42e7dSPeter Dunlap * aborting. 1842a6d42e7dSPeter Dunlap * We'll let IDM worry about rationalizing all that except 1843a6d42e7dSPeter Dunlap * for one particular instance. If the state of the task 1844a6d42e7dSPeter Dunlap * is TASK_COMPLETE, we need to indicate to the framework 1845a6d42e7dSPeter Dunlap * that we are in fact done. This typically happens with 1846a6d42e7dSPeter Dunlap * framework-initiated task management type requests 1847a6d42e7dSPeter Dunlap * (e.g. abort task). 1848a6d42e7dSPeter Dunlap */ 1849a6d42e7dSPeter Dunlap if (idt->idt_state == TASK_COMPLETE) { 1850a6d42e7dSPeter Dunlap idm_refcnt_wait_ref(&idt->idt_refcnt); 1851a6d42e7dSPeter Dunlap return (STMF_ABORT_SUCCESS); 1852a6d42e7dSPeter Dunlap } else { 1853a6d42e7dSPeter Dunlap idm_task_abort(idt->idt_ic, idt, AT_TASK_MGMT_ABORT); 1854a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1855a6d42e7dSPeter Dunlap } 1856a6d42e7dSPeter Dunlap } 1857a6d42e7dSPeter Dunlap 1858a6d42e7dSPeter Dunlap /*NOTREACHED*/ 1859a6d42e7dSPeter Dunlap } 1860a6d42e7dSPeter Dunlap 1861a6d42e7dSPeter Dunlap /*ARGSUSED*/ 1862a6d42e7dSPeter Dunlap void 1863a6d42e7dSPeter Dunlap iscsit_ctl(stmf_local_port_t *lport, int cmd, void *arg) 1864a6d42e7dSPeter Dunlap { 1865a6d42e7dSPeter Dunlap iscsit_tgt_t *iscsit_tgt; 1866a6d42e7dSPeter Dunlap 1867a6d42e7dSPeter Dunlap ASSERT((cmd == STMF_CMD_LPORT_ONLINE) || 1868a6d42e7dSPeter Dunlap (cmd == STMF_ACK_LPORT_ONLINE_COMPLETE) || 1869a6d42e7dSPeter Dunlap (cmd == STMF_CMD_LPORT_OFFLINE) || 1870a6d42e7dSPeter Dunlap (cmd == STMF_ACK_LPORT_OFFLINE_COMPLETE)); 1871a6d42e7dSPeter Dunlap 1872a6d42e7dSPeter Dunlap iscsit_tgt = (iscsit_tgt_t *)lport->lport_port_private; 1873a6d42e7dSPeter Dunlap 1874a6d42e7dSPeter Dunlap switch (cmd) { 1875a6d42e7dSPeter Dunlap case STMF_CMD_LPORT_ONLINE: 1876a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_ONLINE_REQ); 1877a6d42e7dSPeter Dunlap break; 1878a6d42e7dSPeter Dunlap case STMF_CMD_LPORT_OFFLINE: 1879a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_OFFLINE_REQ); 1880a6d42e7dSPeter Dunlap break; 1881a6d42e7dSPeter Dunlap case STMF_ACK_LPORT_ONLINE_COMPLETE: 1882a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_ONLINE_COMPLETE_ACK); 1883a6d42e7dSPeter Dunlap break; 1884a6d42e7dSPeter Dunlap case STMF_ACK_LPORT_OFFLINE_COMPLETE: 1885a6d42e7dSPeter Dunlap iscsit_tgt_sm_event(iscsit_tgt, TE_STMF_OFFLINE_COMPLETE_ACK); 1886a6d42e7dSPeter Dunlap break; 1887a6d42e7dSPeter Dunlap 1888a6d42e7dSPeter Dunlap default: 1889a6d42e7dSPeter Dunlap break; 1890a6d42e7dSPeter Dunlap } 1891a6d42e7dSPeter Dunlap } 1892a6d42e7dSPeter Dunlap 1893a6d42e7dSPeter Dunlap static stmf_status_t 1894a6d42e7dSPeter Dunlap iscsit_idm_to_stmf(idm_status_t idmrc) 1895a6d42e7dSPeter Dunlap { 1896a6d42e7dSPeter Dunlap switch (idmrc) { 1897a6d42e7dSPeter Dunlap case IDM_STATUS_SUCCESS: 1898a6d42e7dSPeter Dunlap return (STMF_SUCCESS); 1899a6d42e7dSPeter Dunlap default: 1900a6d42e7dSPeter Dunlap return (STMF_FAILURE); 1901a6d42e7dSPeter Dunlap } 1902a6d42e7dSPeter Dunlap /*NOTREACHED*/ 1903a6d42e7dSPeter Dunlap } 1904a6d42e7dSPeter Dunlap 1905*d618d68dSPriya Krishnan void 1906*d618d68dSPriya Krishnan iscsit_op_scsi_cmd(idm_conn_t *ic, idm_pdu_t *rx_pdu) 1907*d618d68dSPriya Krishnan { 1908*d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 1909*d618d68dSPriya Krishnan 1910*d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 1911*d618d68dSPriya Krishnan iscsit_post_scsi_cmd(ic, rx_pdu); 1912*d618d68dSPriya Krishnan } 1913*d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(ict->ict_sess); 1914*d618d68dSPriya Krishnan } 1915a6d42e7dSPeter Dunlap 1916a6d42e7dSPeter Dunlap /* 1917a6d42e7dSPeter Dunlap * ISCSI protocol 1918a6d42e7dSPeter Dunlap */ 1919a6d42e7dSPeter Dunlap 1920a6d42e7dSPeter Dunlap void 1921*d618d68dSPriya Krishnan iscsit_post_scsi_cmd(idm_conn_t *ic, idm_pdu_t *rx_pdu) 1922a6d42e7dSPeter Dunlap { 1923a6d42e7dSPeter Dunlap iscsit_conn_t *ict; 1924a6d42e7dSPeter Dunlap iscsit_task_t *itask; 1925a6d42e7dSPeter Dunlap scsi_task_t *task; 1926a6d42e7dSPeter Dunlap iscsit_buf_t *ibuf; 1927a6d42e7dSPeter Dunlap iscsi_scsi_cmd_hdr_t *iscsi_scsi = 1928a6d42e7dSPeter Dunlap (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 1929a6d42e7dSPeter Dunlap iscsi_addl_hdr_t *ahs_hdr; 1930a6d42e7dSPeter Dunlap uint16_t addl_cdb_len = 0; 1931a6d42e7dSPeter Dunlap 1932a6d42e7dSPeter Dunlap ict = ic->ic_handle; 1933a6d42e7dSPeter Dunlap 1934a6d42e7dSPeter Dunlap itask = iscsit_task_alloc(ict); 1935a6d42e7dSPeter Dunlap if (itask == NULL) { 193672cf3143Speter dunlap /* Finish processing request */ 193772cf3143Speter dunlap iscsit_set_cmdsn(ict, rx_pdu); 193872cf3143Speter dunlap 1939a6d42e7dSPeter Dunlap iscsit_send_direct_scsi_resp(ict, rx_pdu, 1940a6d42e7dSPeter Dunlap ISCSI_STATUS_CMD_COMPLETED, STATUS_BUSY); 1941a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 1942a6d42e7dSPeter Dunlap return; 1943a6d42e7dSPeter Dunlap } 1944a6d42e7dSPeter Dunlap 1945a6d42e7dSPeter Dunlap /* 1946a6d42e7dSPeter Dunlap * Note CmdSN and ITT in task. IDM will have already validated this 1947a6d42e7dSPeter Dunlap * request against the connection state so we don't need to check 1948a6d42e7dSPeter Dunlap * that (the connection may have changed state in the meantime but 1949a6d42e7dSPeter Dunlap * we will catch that when we try to send a response) 1950a6d42e7dSPeter Dunlap */ 1951a6d42e7dSPeter Dunlap itask->it_cmdsn = ntohl(iscsi_scsi->cmdsn); 1952a6d42e7dSPeter Dunlap itask->it_itt = iscsi_scsi->itt; 1953a6d42e7dSPeter Dunlap 1954a6d42e7dSPeter Dunlap /* 1955a6d42e7dSPeter Dunlap * Check for extended CDB AHS 1956a6d42e7dSPeter Dunlap */ 1957a6d42e7dSPeter Dunlap if (iscsi_scsi->hlength > 0) { 1958a6d42e7dSPeter Dunlap ahs_hdr = (iscsi_addl_hdr_t *)iscsi_scsi; 1959a6d42e7dSPeter Dunlap addl_cdb_len = ((ahs_hdr->ahs_hlen_hi << 8) | 1960a6d42e7dSPeter Dunlap ahs_hdr->ahs_hlen_lo) - 1; /* Adjust for reserved byte */ 1961a6d42e7dSPeter Dunlap if (((addl_cdb_len + 4) / sizeof (uint32_t)) > 1962a6d42e7dSPeter Dunlap iscsi_scsi->hlength) { 1963a6d42e7dSPeter Dunlap /* Mangled header info, drop it */ 1964a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 1965a6d42e7dSPeter Dunlap return; 1966a6d42e7dSPeter Dunlap } 1967a6d42e7dSPeter Dunlap } 1968a6d42e7dSPeter Dunlap 1969a6d42e7dSPeter Dunlap ict = rx_pdu->isp_ic->ic_handle; /* IDM client private */ 1970a6d42e7dSPeter Dunlap 197172cf3143Speter dunlap /* 197272cf3143Speter dunlap * Add task to session list. This function will also check to 197372cf3143Speter dunlap * ensure that the task does not already exist. 197472cf3143Speter dunlap */ 197572cf3143Speter dunlap if (iscsit_task_start(itask) != IDM_STATUS_SUCCESS) { 197672cf3143Speter dunlap /* 197772cf3143Speter dunlap * Task exists, free all resources and reject. Don't 197872cf3143Speter dunlap * update expcmdsn in this case because RFC 3720 says 197972cf3143Speter dunlap * "The CmdSN of the rejected command PDU (if it is a 198072cf3143Speter dunlap * non-immediate command) MUST NOT be considered received 198172cf3143Speter dunlap * by the target (i.e., a command sequence gap must be 198272cf3143Speter dunlap * assumed for the CmdSN), even though the CmdSN of the 198372cf3143Speter dunlap * rejected command PDU may be reliably ascertained. Upon 198472cf3143Speter dunlap * receiving the Reject, the initiator MUST plug the CmdSN 198572cf3143Speter dunlap * gap in order to continue to use the session. The gap 198672cf3143Speter dunlap * may be plugged either by transmitting a command PDU 198772cf3143Speter dunlap * with the same CmdSN, or by aborting the task (see section 198872cf3143Speter dunlap * 6.9 on how an abort may plug a CmdSN gap)." (Section 6.3) 198972cf3143Speter dunlap */ 199072cf3143Speter dunlap iscsit_task_free(itask); 199172cf3143Speter dunlap iscsit_send_reject(ict, rx_pdu, ISCSI_REJECT_TASK_IN_PROGRESS); 199272cf3143Speter dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 199372cf3143Speter dunlap return; 199472cf3143Speter dunlap } 199572cf3143Speter dunlap 199672cf3143Speter dunlap /* Update sequence numbers */ 199772cf3143Speter dunlap iscsit_set_cmdsn(ict, rx_pdu); 199872cf3143Speter dunlap 199972cf3143Speter dunlap /* 200072cf3143Speter dunlap * Allocate STMF task 200172cf3143Speter dunlap */ 2002a6d42e7dSPeter Dunlap itask->it_stmf_task = stmf_task_alloc( 2003a6d42e7dSPeter Dunlap itask->it_ict->ict_sess->ist_lport, 2004a6d42e7dSPeter Dunlap itask->it_ict->ict_sess->ist_stmf_sess, iscsi_scsi->lun, 2005a6d42e7dSPeter Dunlap 16 + addl_cdb_len, 0); 2006a6d42e7dSPeter Dunlap if (itask->it_stmf_task == NULL) { 2007a6d42e7dSPeter Dunlap /* 2008a6d42e7dSPeter Dunlap * Either stmf really couldn't get memory for a task or, 2009a6d42e7dSPeter Dunlap * more likely, the LU is currently in reset. Either way 2010a6d42e7dSPeter Dunlap * we have no choice but to fail the request. 2011a6d42e7dSPeter Dunlap */ 201272cf3143Speter dunlap iscsit_task_done(itask); 2013a6d42e7dSPeter Dunlap iscsit_task_free(itask); 2014a6d42e7dSPeter Dunlap iscsit_send_direct_scsi_resp(ict, rx_pdu, 2015a6d42e7dSPeter Dunlap ISCSI_STATUS_CMD_COMPLETED, STATUS_BUSY); 201672cf3143Speter dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2017a6d42e7dSPeter Dunlap return; 2018a6d42e7dSPeter Dunlap } 2019a6d42e7dSPeter Dunlap 2020a6d42e7dSPeter Dunlap task = itask->it_stmf_task; 2021a6d42e7dSPeter Dunlap task->task_port_private = itask; 2022a6d42e7dSPeter Dunlap 2023a6d42e7dSPeter Dunlap bcopy(iscsi_scsi->lun, task->task_lun_no, sizeof (task->task_lun_no)); 2024a6d42e7dSPeter Dunlap 2025a6d42e7dSPeter Dunlap /* 2026a6d42e7dSPeter Dunlap * iSCSI and Comstar use the same values. Should we rely on this 2027a6d42e7dSPeter Dunlap * or translate them bit-wise? 2028a6d42e7dSPeter Dunlap */ 2029a6d42e7dSPeter Dunlap 2030a6d42e7dSPeter Dunlap task->task_flags = 2031a6d42e7dSPeter Dunlap (((iscsi_scsi->flags & ISCSI_FLAG_CMD_READ) ? TF_READ_DATA : 0) | 2032a6d42e7dSPeter Dunlap ((iscsi_scsi->flags & ISCSI_FLAG_CMD_WRITE) ? TF_WRITE_DATA : 0) | 2033a6d42e7dSPeter Dunlap ((rx_pdu->isp_datalen == 0) ? 0 : TF_INITIAL_BURST)); 2034a6d42e7dSPeter Dunlap 2035a6d42e7dSPeter Dunlap switch (iscsi_scsi->flags & ISCSI_FLAG_CMD_ATTR_MASK) { 2036a6d42e7dSPeter Dunlap case ISCSI_ATTR_UNTAGGED: 2037a6d42e7dSPeter Dunlap break; 2038a6d42e7dSPeter Dunlap case ISCSI_ATTR_SIMPLE: 2039a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_SIMPLE_QUEUE; 2040a6d42e7dSPeter Dunlap break; 2041a6d42e7dSPeter Dunlap case ISCSI_ATTR_ORDERED: 2042a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_ORDERED_QUEUE; 2043a6d42e7dSPeter Dunlap break; 2044a6d42e7dSPeter Dunlap case ISCSI_ATTR_HEAD_OF_QUEUE: 2045a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_HEAD_OF_QUEUE; 2046a6d42e7dSPeter Dunlap break; 2047a6d42e7dSPeter Dunlap case ISCSI_ATTR_ACA: 2048a6d42e7dSPeter Dunlap task->task_additional_flags |= TF_ATTR_ACA; 2049a6d42e7dSPeter Dunlap break; 2050a6d42e7dSPeter Dunlap default: 2051a6d42e7dSPeter Dunlap /* Protocol error but just take it, treat as untagged */ 2052a6d42e7dSPeter Dunlap break; 2053a6d42e7dSPeter Dunlap } 2054a6d42e7dSPeter Dunlap 2055a6d42e7dSPeter Dunlap 2056a6d42e7dSPeter Dunlap task->task_additional_flags = 0; 2057a6d42e7dSPeter Dunlap task->task_priority = 0; 2058a6d42e7dSPeter Dunlap task->task_mgmt_function = TM_NONE; 2059a6d42e7dSPeter Dunlap 2060a6d42e7dSPeter Dunlap /* 2061a6d42e7dSPeter Dunlap * This "task_max_nbufs" doesn't map well to BIDI. We probably need 2062a6d42e7dSPeter Dunlap * parameter for each direction. "MaxOutstandingR2T" may very well 2063a6d42e7dSPeter Dunlap * be set to one which could prevent us from doing simultaneous 2064a6d42e7dSPeter Dunlap * transfers in each direction. 2065a6d42e7dSPeter Dunlap */ 2066a6d42e7dSPeter Dunlap task->task_max_nbufs = (iscsi_scsi->flags & ISCSI_FLAG_CMD_WRITE) ? 2067a6d42e7dSPeter Dunlap ict->ict_op.op_max_outstanding_r2t : STMF_BUFS_MAX; 2068a6d42e7dSPeter Dunlap task->task_cmd_seq_no = ntohl(iscsi_scsi->itt); 2069a6d42e7dSPeter Dunlap task->task_expected_xfer_length = ntohl(iscsi_scsi->data_length); 2070a6d42e7dSPeter Dunlap 2071a6d42e7dSPeter Dunlap /* Copy CDB */ 2072a6d42e7dSPeter Dunlap bcopy(iscsi_scsi->scb, task->task_cdb, 16); 2073a6d42e7dSPeter Dunlap if (addl_cdb_len > 0) { 2074a6d42e7dSPeter Dunlap bcopy(ahs_hdr->ahs_extscb, task->task_cdb + 16, addl_cdb_len); 2075a6d42e7dSPeter Dunlap } 2076a6d42e7dSPeter Dunlap 2077a668b114SPriya Krishnan DTRACE_ISCSI_3(scsi__command, idm_conn_t *, ic, 2078a668b114SPriya Krishnan iscsi_scsi_cmd_hdr_t *, (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr, 2079a668b114SPriya Krishnan scsi_task_t *, task); 2080a668b114SPriya Krishnan 2081a6d42e7dSPeter Dunlap /* 2082a6d42e7dSPeter Dunlap * Copy the transport header into the task handle from the PDU 2083a6d42e7dSPeter Dunlap * handle. The transport header describes this task's remote tagged 2084a6d42e7dSPeter Dunlap * buffer. 2085a6d42e7dSPeter Dunlap */ 2086a6d42e7dSPeter Dunlap if (rx_pdu->isp_transport_hdrlen != 0) { 2087a6d42e7dSPeter Dunlap bcopy(rx_pdu->isp_transport_hdr, 2088a6d42e7dSPeter Dunlap itask->it_idm_task->idt_transport_hdr, 2089a6d42e7dSPeter Dunlap rx_pdu->isp_transport_hdrlen); 2090a6d42e7dSPeter Dunlap } 2091a6d42e7dSPeter Dunlap 2092a6d42e7dSPeter Dunlap /* 2093a6d42e7dSPeter Dunlap * Tell IDM about our new active task 2094a6d42e7dSPeter Dunlap */ 2095a6d42e7dSPeter Dunlap idm_task_start(itask->it_idm_task, (uintptr_t)itask->it_itt); 2096a6d42e7dSPeter Dunlap 2097a6d42e7dSPeter Dunlap /* 2098a6d42e7dSPeter Dunlap * If we have any immediate data then setup the immediate buffer 2099a6d42e7dSPeter Dunlap * context that comes with the task 2100a6d42e7dSPeter Dunlap */ 2101a6d42e7dSPeter Dunlap if (rx_pdu->isp_datalen) { 2102a6d42e7dSPeter Dunlap ibuf = itask->it_immed_data; 2103a6d42e7dSPeter Dunlap ibuf->ibuf_immed_data_pdu = rx_pdu; 2104a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_data_size = rx_pdu->isp_datalen; 2105a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_buf_size = rx_pdu->isp_datalen; 2106a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_relative_offset = 0; 2107a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_sglist[0].seg_length = 2108a6d42e7dSPeter Dunlap rx_pdu->isp_datalen; 2109a6d42e7dSPeter Dunlap ibuf->ibuf_stmf_buf->db_sglist[0].seg_addr = rx_pdu->isp_data; 2110a6d42e7dSPeter Dunlap 2111a668b114SPriya Krishnan DTRACE_ISCSI_8(xfer__start, idm_conn_t *, ic, 2112a668b114SPriya Krishnan uintptr_t, ibuf->ibuf_stmf_buf->db_sglist[0].seg_addr, 2113a668b114SPriya Krishnan uint32_t, ibuf->ibuf_stmf_buf->db_relative_offset, 2114a668b114SPriya Krishnan uint64_t, 0, uint32_t, 0, uint32_t, 0, /* no raddr */ 2115a668b114SPriya Krishnan uint32_t, rx_pdu->isp_datalen, int, XFER_BUF_TX_TO_INI); 2116a668b114SPriya Krishnan 21173badd853SPriya Krishnan /* 21183badd853SPriya Krishnan * For immediate data transfer, there is no callback from 21193badd853SPriya Krishnan * stmf to indicate that the initial burst of data is 21203badd853SPriya Krishnan * transferred successfully. In some cases, the task can 21213badd853SPriya Krishnan * get freed before execution returns from stmf_post_task. 21223badd853SPriya Krishnan * Although this xfer-start/done probe accurately tracks 21233badd853SPriya Krishnan * the size of the transfer, it does only provide a best 21243badd853SPriya Krishnan * effort on the timing of the transfer. 21253badd853SPriya Krishnan */ 2126a668b114SPriya Krishnan DTRACE_ISCSI_8(xfer__done, idm_conn_t *, ic, 2127a668b114SPriya Krishnan uintptr_t, ibuf->ibuf_stmf_buf->db_sglist[0].seg_addr, 2128a668b114SPriya Krishnan uint32_t, ibuf->ibuf_stmf_buf->db_relative_offset, 2129a668b114SPriya Krishnan uint64_t, 0, uint32_t, 0, uint32_t, 0, /* no raddr */ 2130a668b114SPriya Krishnan uint32_t, rx_pdu->isp_datalen, int, XFER_BUF_TX_TO_INI); 21313badd853SPriya Krishnan stmf_post_task(task, ibuf->ibuf_stmf_buf); 2132a6d42e7dSPeter Dunlap } else { 21333badd853SPriya Krishnan 2134a6d42e7dSPeter Dunlap stmf_post_task(task, NULL); 2135a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2136a6d42e7dSPeter Dunlap } 2137a6d42e7dSPeter Dunlap } 2138a6d42e7dSPeter Dunlap 2139a6d42e7dSPeter Dunlap /*ARGSUSED*/ 2140a6d42e7dSPeter Dunlap void 2141a6d42e7dSPeter Dunlap iscsit_deferred_dispatch(idm_pdu_t *rx_pdu) 2142a6d42e7dSPeter Dunlap { 2143a6d42e7dSPeter Dunlap iscsit_conn_t *ict = rx_pdu->isp_ic->ic_handle; 2144a6d42e7dSPeter Dunlap 2145a6d42e7dSPeter Dunlap /* 2146a6d42e7dSPeter Dunlap * If the connection has been lost then ignore new PDU's 2147a6d42e7dSPeter Dunlap */ 2148a6d42e7dSPeter Dunlap mutex_enter(&ict->ict_mutex); 2149a6d42e7dSPeter Dunlap if (ict->ict_lost) { 2150a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 2151a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 2152a6d42e7dSPeter Dunlap return; 2153a6d42e7dSPeter Dunlap } 2154a6d42e7dSPeter Dunlap 2155a6d42e7dSPeter Dunlap /* 2156a6d42e7dSPeter Dunlap * Grab a hold on the connection to prevent it from going away 2157a6d42e7dSPeter Dunlap * between now and when the taskq function is called. 2158a6d42e7dSPeter Dunlap */ 2159a6d42e7dSPeter Dunlap iscsit_conn_dispatch_hold(ict); 2160a6d42e7dSPeter Dunlap mutex_exit(&ict->ict_mutex); 2161a6d42e7dSPeter Dunlap 2162a6d42e7dSPeter Dunlap if (taskq_dispatch(iscsit_global.global_dispatch_taskq, 2163a6d42e7dSPeter Dunlap iscsit_deferred, rx_pdu, DDI_NOSLEEP) == NULL) { 2164a6d42e7dSPeter Dunlap /* 2165a6d42e7dSPeter Dunlap * In the unlikely scenario that we couldn't get the resources 2166a6d42e7dSPeter Dunlap * to dispatch the PDU then just drop it. 2167a6d42e7dSPeter Dunlap */ 2168a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 2169a6d42e7dSPeter Dunlap idm_conn_event(ict->ict_ic, CE_TRANSPORT_FAIL, NULL); 2170a6d42e7dSPeter Dunlap iscsit_conn_dispatch_rele(ict); 2171a6d42e7dSPeter Dunlap } 2172a6d42e7dSPeter Dunlap } 2173a6d42e7dSPeter Dunlap 2174a6d42e7dSPeter Dunlap static void 2175a6d42e7dSPeter Dunlap iscsit_deferred(void *rx_pdu_void) 2176a6d42e7dSPeter Dunlap { 2177*d618d68dSPriya Krishnan idm_pdu_t *rx_pdu = rx_pdu_void; 2178*d618d68dSPriya Krishnan idm_conn_t *ic = rx_pdu->isp_ic; 2179*d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 2180a6d42e7dSPeter Dunlap 2181*d618d68dSPriya Krishnan /* 2182*d618d68dSPriya Krishnan * NOP and Task Management Commands can be marked for immediate 2183*d618d68dSPriya Krishnan * delivery. Commands marked as 'Immediate' are to be considered 2184*d618d68dSPriya Krishnan * for execution as soon as they arrive on the target. So these 2185*d618d68dSPriya Krishnan * should not be checked for sequence order and put in a queue. 2186*d618d68dSPriya Krishnan * The CmdSN is not advanced for Immediate Commands. 2187*d618d68dSPriya Krishnan */ 2188a6d42e7dSPeter Dunlap switch (IDM_PDU_OPCODE(rx_pdu)) { 2189a6d42e7dSPeter Dunlap case ISCSI_OP_NOOP_OUT: 2190*d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 2191*d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 2192*d618d68dSPriya Krishnan iscsit_pdu_op_noop(ict, rx_pdu); 2193*d618d68dSPriya Krishnan } 2194a6d42e7dSPeter Dunlap break; 2195a6d42e7dSPeter Dunlap case ISCSI_OP_LOGIN_CMD: 2196a6d42e7dSPeter Dunlap iscsit_pdu_op_login_cmd(ict, rx_pdu); 2197*d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); 2198*d618d68dSPriya Krishnan return; 2199a6d42e7dSPeter Dunlap case ISCSI_OP_TEXT_CMD: 2200*d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 2201*d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 2202*d618d68dSPriya Krishnan iscsit_pdu_op_text_cmd(ict, rx_pdu); 2203*d618d68dSPriya Krishnan } 2204a6d42e7dSPeter Dunlap break; 2205a6d42e7dSPeter Dunlap case ISCSI_OP_LOGOUT_CMD: 2206*d618d68dSPriya Krishnan if (iscsit_check_cmdsn_and_queue(rx_pdu)) { 2207*d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 2208*d618d68dSPriya Krishnan iscsit_pdu_op_logout_cmd(ict, rx_pdu); 2209*d618d68dSPriya Krishnan } 2210a6d42e7dSPeter Dunlap break; 2211a6d42e7dSPeter Dunlap default: 2212a6d42e7dSPeter Dunlap /* Protocol error. IDM should have caught this */ 2213a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 2214a6d42e7dSPeter Dunlap ASSERT(0); 2215a6d42e7dSPeter Dunlap break; 2216a6d42e7dSPeter Dunlap } 2217*d618d68dSPriya Krishnan /* 2218*d618d68dSPriya Krishnan * Check if there are other PDUs in the session staging queue 2219*d618d68dSPriya Krishnan * waiting to be posted to SCSI layer. 2220*d618d68dSPriya Krishnan */ 2221*d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(ict->ict_sess); 2222a6d42e7dSPeter Dunlap 2223a6d42e7dSPeter Dunlap iscsit_conn_dispatch_rele(ict); 2224a6d42e7dSPeter Dunlap } 2225a6d42e7dSPeter Dunlap 2226a6d42e7dSPeter Dunlap static void 2227a6d42e7dSPeter Dunlap iscsit_send_direct_scsi_resp(iscsit_conn_t *ict, idm_pdu_t *rx_pdu, 2228a6d42e7dSPeter Dunlap uint8_t response, uint8_t cmd_status) 2229a6d42e7dSPeter Dunlap { 2230a6d42e7dSPeter Dunlap idm_pdu_t *rsp_pdu; 2231a6d42e7dSPeter Dunlap idm_conn_t *ic; 2232a6d42e7dSPeter Dunlap iscsi_scsi_rsp_hdr_t *resp; 223330e7468fSPeter Dunlap iscsi_scsi_cmd_hdr_t *req = 223430e7468fSPeter Dunlap (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 2235a6d42e7dSPeter Dunlap 2236a6d42e7dSPeter Dunlap ic = ict->ict_ic; 2237a6d42e7dSPeter Dunlap 2238a6d42e7dSPeter Dunlap rsp_pdu = idm_pdu_alloc(sizeof (iscsi_scsi_rsp_hdr_t), 0); 2239a6d42e7dSPeter Dunlap idm_pdu_init(rsp_pdu, ic, NULL, NULL); 224060220f10SPriya Krishnan /* 224160220f10SPriya Krishnan * StatSN is incremented by 1 for every response sent on 224260220f10SPriya Krishnan * a connection except for responses sent as a result of 224360220f10SPriya Krishnan * a retry or SNACK 224460220f10SPriya Krishnan */ 224560220f10SPriya Krishnan rsp_pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 224660220f10SPriya Krishnan 2247a6d42e7dSPeter Dunlap resp = (iscsi_scsi_rsp_hdr_t *)rsp_pdu->isp_hdr; 2248a6d42e7dSPeter Dunlap 2249a6d42e7dSPeter Dunlap resp->opcode = ISCSI_OP_SCSI_RSP; 2250a6d42e7dSPeter Dunlap resp->flags = ISCSI_FLAG_FINAL; 2251a6d42e7dSPeter Dunlap resp->response = response; 2252a6d42e7dSPeter Dunlap resp->cmd_status = cmd_status; 225330e7468fSPeter Dunlap resp->itt = req->itt; 225430e7468fSPeter Dunlap if ((response == ISCSI_STATUS_CMD_COMPLETED) && 225530e7468fSPeter Dunlap (req->data_length != 0) && 225630e7468fSPeter Dunlap ((req->flags & ISCSI_FLAG_CMD_READ) || 225730e7468fSPeter Dunlap (req->flags & ISCSI_FLAG_CMD_WRITE))) { 225830e7468fSPeter Dunlap resp->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 225930e7468fSPeter Dunlap resp->residual_count = req->data_length; 226030e7468fSPeter Dunlap } 226130e7468fSPeter Dunlap 226230e7468fSPeter Dunlap DTRACE_PROBE4(iscsi__scsi__direct__response, 226330e7468fSPeter Dunlap iscsit_conn_t *, ict, 226430e7468fSPeter Dunlap uint8_t, resp->response, 226530e7468fSPeter Dunlap uint8_t, resp->cmd_status, 226630e7468fSPeter Dunlap idm_pdu_t *, rsp_pdu); 2267a6d42e7dSPeter Dunlap 2268a6d42e7dSPeter Dunlap iscsit_pdu_tx(rsp_pdu); 2269a6d42e7dSPeter Dunlap } 2270a6d42e7dSPeter Dunlap 2271a6d42e7dSPeter Dunlap void 2272a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(idm_pdu_t *tm_resp_pdu, uint8_t tm_status) 2273a6d42e7dSPeter Dunlap { 2274a6d42e7dSPeter Dunlap iscsi_scsi_task_mgt_rsp_hdr_t *tm_resp; 2275a6d42e7dSPeter Dunlap 227660220f10SPriya Krishnan /* 227760220f10SPriya Krishnan * The target must take note of the last-sent StatSN. 227860220f10SPriya Krishnan * The StatSN is to be incremented after sending a 227960220f10SPriya Krishnan * task management response. Digest recovery can only 228060220f10SPriya Krishnan * work if StatSN is incremented. 228160220f10SPriya Krishnan */ 228260220f10SPriya Krishnan tm_resp_pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 2283a6d42e7dSPeter Dunlap tm_resp = (iscsi_scsi_task_mgt_rsp_hdr_t *)tm_resp_pdu->isp_hdr; 2284a6d42e7dSPeter Dunlap tm_resp->response = tm_status; 228530e7468fSPeter Dunlap 228630e7468fSPeter Dunlap DTRACE_PROBE3(iscsi__scsi__tm__response, 228730e7468fSPeter Dunlap iscsit_conn_t *, tm_resp_pdu->isp_ic->ic_handle, 228830e7468fSPeter Dunlap uint8_t, tm_resp->response, 228930e7468fSPeter Dunlap idm_pdu_t *, tm_resp_pdu); 2290a6d42e7dSPeter Dunlap iscsit_pdu_tx(tm_resp_pdu); 2291a6d42e7dSPeter Dunlap } 2292a6d42e7dSPeter Dunlap 2293a6d42e7dSPeter Dunlap void 2294a6d42e7dSPeter Dunlap iscsit_op_scsi_task_mgmt(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2295a6d42e7dSPeter Dunlap { 2296a6d42e7dSPeter Dunlap idm_pdu_t *tm_resp_pdu; 2297a6d42e7dSPeter Dunlap iscsit_task_t *itask; 2298a6d42e7dSPeter Dunlap iscsit_task_t *tm_itask; 2299a6d42e7dSPeter Dunlap scsi_task_t *task; 2300a6d42e7dSPeter Dunlap iscsi_scsi_task_mgt_hdr_t *iscsi_tm = 2301a6d42e7dSPeter Dunlap (iscsi_scsi_task_mgt_hdr_t *)rx_pdu->isp_hdr; 2302a6d42e7dSPeter Dunlap iscsi_scsi_task_mgt_rsp_hdr_t *iscsi_tm_rsp = 2303a6d42e7dSPeter Dunlap (iscsi_scsi_task_mgt_rsp_hdr_t *)rx_pdu->isp_hdr; 2304a6d42e7dSPeter Dunlap uint32_t rtt, cmdsn, refcmdsn; 2305a6d42e7dSPeter Dunlap uint8_t tm_func; 2306a6d42e7dSPeter Dunlap 2307a6d42e7dSPeter Dunlap /* 2308a6d42e7dSPeter Dunlap * Setup response PDU (response field will get filled in later) 2309a6d42e7dSPeter Dunlap */ 2310a6d42e7dSPeter Dunlap tm_resp_pdu = idm_pdu_alloc(sizeof (iscsi_scsi_task_mgt_rsp_hdr_t), 0); 2311a6d42e7dSPeter Dunlap if (tm_resp_pdu == NULL) { 2312a6d42e7dSPeter Dunlap /* Can't respond, just drop it */ 2313a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2314a6d42e7dSPeter Dunlap return; 2315a6d42e7dSPeter Dunlap } 2316a6d42e7dSPeter Dunlap idm_pdu_init(tm_resp_pdu, ict->ict_ic, NULL, NULL); 2317a6d42e7dSPeter Dunlap iscsi_tm_rsp = (iscsi_scsi_task_mgt_rsp_hdr_t *)tm_resp_pdu->isp_hdr; 2318a6d42e7dSPeter Dunlap bzero(iscsi_tm_rsp, sizeof (iscsi_scsi_task_mgt_rsp_hdr_t)); 2319a6d42e7dSPeter Dunlap iscsi_tm_rsp->opcode = ISCSI_OP_SCSI_TASK_MGT_RSP; 2320a6d42e7dSPeter Dunlap iscsi_tm_rsp->flags = ISCSI_FLAG_FINAL; 2321a6d42e7dSPeter Dunlap iscsi_tm_rsp->itt = rx_pdu->isp_hdr->itt; 2322a6d42e7dSPeter Dunlap 2323a6d42e7dSPeter Dunlap /* 2324a6d42e7dSPeter Dunlap * Figure out what we're being asked to do. 2325a6d42e7dSPeter Dunlap */ 232630e7468fSPeter Dunlap DTRACE_PROBE4(iscsi__scsi__tm__request, 232730e7468fSPeter Dunlap iscsit_conn_t *, ict, 232830e7468fSPeter Dunlap uint8_t, (iscsi_tm->function & ISCSI_FLAG_TASK_MGMT_FUNCTION_MASK), 232930e7468fSPeter Dunlap uint32_t, iscsi_tm->rtt, 233030e7468fSPeter Dunlap idm_pdu_t *, rx_pdu); 2331a6d42e7dSPeter Dunlap switch (iscsi_tm->function & ISCSI_FLAG_TASK_MGMT_FUNCTION_MASK) { 2332a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_ABORT_TASK: 2333a6d42e7dSPeter Dunlap /* 2334a6d42e7dSPeter Dunlap * STMF doesn't currently support the "abort task" task 2335a6d42e7dSPeter Dunlap * management command although it does support aborting 2336a6d42e7dSPeter Dunlap * an individual task. We'll get STMF to abort the task 2337a6d42e7dSPeter Dunlap * for us but handle the details of the task management 2338a6d42e7dSPeter Dunlap * command ourselves. 2339a6d42e7dSPeter Dunlap * 2340a6d42e7dSPeter Dunlap * Find the task associated with the referenced task tag. 2341a6d42e7dSPeter Dunlap */ 2342a6d42e7dSPeter Dunlap rtt = iscsi_tm->rtt; 2343a6d42e7dSPeter Dunlap itask = (iscsit_task_t *)idm_task_find_by_handle(ict->ict_ic, 2344a6d42e7dSPeter Dunlap (uintptr_t)rtt); 2345a6d42e7dSPeter Dunlap 2346a6d42e7dSPeter Dunlap if (itask == NULL) { 2347a6d42e7dSPeter Dunlap cmdsn = ntohl(iscsi_tm->cmdsn); 2348a6d42e7dSPeter Dunlap refcmdsn = ntohl(iscsi_tm->refcmdsn); 2349a6d42e7dSPeter Dunlap 2350a6d42e7dSPeter Dunlap /* 2351*d618d68dSPriya Krishnan * Task was not found. But the SCSI command could be 2352*d618d68dSPriya Krishnan * on the rxpdu wait queue. If RefCmdSN is within 2353*d618d68dSPriya Krishnan * the CmdSN window and less than CmdSN of the TM 2354*d618d68dSPriya Krishnan * function, return "Function Complete". Otherwise, 2355*d618d68dSPriya Krishnan * return "Task Does Not Exist". 2356a6d42e7dSPeter Dunlap */ 2357a6d42e7dSPeter Dunlap 2358a6d42e7dSPeter Dunlap if (iscsit_cmdsn_in_window(ict, refcmdsn) && 2359*d618d68dSPriya Krishnan iscsit_sna_lt(refcmdsn, cmdsn)) { 2360*d618d68dSPriya Krishnan mutex_enter(&ict->ict_sess->ist_sn_mutex); 2361*d618d68dSPriya Krishnan (void) iscsit_remove_pdu_from_queue( 2362*d618d68dSPriya Krishnan ict->ict_sess, refcmdsn); 2363*d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); 2364*d618d68dSPriya Krishnan mutex_exit(&ict->ict_sess->ist_sn_mutex); 2365a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2366a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_COMPLETE); 2367a6d42e7dSPeter Dunlap } else { 2368a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2369a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_NO_TASK); 2370a6d42e7dSPeter Dunlap } 2371a6d42e7dSPeter Dunlap } else { 2372a6d42e7dSPeter Dunlap 2373a6d42e7dSPeter Dunlap /* 2374a6d42e7dSPeter Dunlap * Tell STMF to abort the task. This will do no harm 2375a6d42e7dSPeter Dunlap * if the task is already complete. 2376a6d42e7dSPeter Dunlap */ 2377a6d42e7dSPeter Dunlap stmf_abort(STMF_QUEUE_TASK_ABORT, itask->it_stmf_task, 2378a6d42e7dSPeter Dunlap STMF_ABORTED, NULL); 2379a6d42e7dSPeter Dunlap 2380a6d42e7dSPeter Dunlap /* 2381a6d42e7dSPeter Dunlap * Make sure the task hasn't already completed 2382a6d42e7dSPeter Dunlap */ 2383a6d42e7dSPeter Dunlap mutex_enter(&itask->it_idm_task->idt_mutex); 2384a6d42e7dSPeter Dunlap if ((itask->it_idm_task->idt_state == TASK_COMPLETE) || 2385a6d42e7dSPeter Dunlap (itask->it_idm_task->idt_state == TASK_IDLE)) { 2386a6d42e7dSPeter Dunlap /* 2387a6d42e7dSPeter Dunlap * Task is complete, return "Task Does Not 2388a6d42e7dSPeter Dunlap * Exist" 2389a6d42e7dSPeter Dunlap */ 2390a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 2391a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2392a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_NO_TASK); 2393a6d42e7dSPeter Dunlap } else { 2394a6d42e7dSPeter Dunlap /* 2395a6d42e7dSPeter Dunlap * STMF is now aborting the task, return 2396a6d42e7dSPeter Dunlap * "Function Complete" 2397a6d42e7dSPeter Dunlap */ 2398a6d42e7dSPeter Dunlap mutex_exit(&itask->it_idm_task->idt_mutex); 2399a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2400a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_COMPLETE); 2401a6d42e7dSPeter Dunlap } 2402a6d42e7dSPeter Dunlap idm_task_rele(itask->it_idm_task); 2403a6d42e7dSPeter Dunlap } 2404a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2405a6d42e7dSPeter Dunlap return; 2406a6d42e7dSPeter Dunlap 2407a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_ABORT_TASK_SET: 2408a6d42e7dSPeter Dunlap tm_func = TM_ABORT_TASK_SET; 2409a6d42e7dSPeter Dunlap break; 2410a6d42e7dSPeter Dunlap 2411a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_CLEAR_ACA: 2412a6d42e7dSPeter Dunlap tm_func = TM_CLEAR_ACA; 2413a6d42e7dSPeter Dunlap break; 2414a6d42e7dSPeter Dunlap 2415a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_CLEAR_TASK_SET: 2416a6d42e7dSPeter Dunlap tm_func = TM_CLEAR_TASK_SET; 2417a6d42e7dSPeter Dunlap break; 2418a6d42e7dSPeter Dunlap 2419a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: 2420a6d42e7dSPeter Dunlap tm_func = TM_LUN_RESET; 2421a6d42e7dSPeter Dunlap break; 2422a6d42e7dSPeter Dunlap 2423a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_TARGET_WARM_RESET: 2424a6d42e7dSPeter Dunlap tm_func = TM_TARGET_WARM_RESET; 2425a6d42e7dSPeter Dunlap break; 2426a6d42e7dSPeter Dunlap 2427a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_TARGET_COLD_RESET: 2428a6d42e7dSPeter Dunlap tm_func = TM_TARGET_COLD_RESET; 2429a6d42e7dSPeter Dunlap break; 2430a6d42e7dSPeter Dunlap 2431a6d42e7dSPeter Dunlap case ISCSI_TM_FUNC_TASK_REASSIGN: 2432a6d42e7dSPeter Dunlap /* 2433a6d42e7dSPeter Dunlap * We do not currently support allegiance reassignment. When 2434a6d42e7dSPeter Dunlap * we start supporting ERL1+, we will need to. 2435a6d42e7dSPeter Dunlap */ 2436a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2437a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_NO_ALLG_REASSN); 2438a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2439a6d42e7dSPeter Dunlap return; 2440a6d42e7dSPeter Dunlap 2441a6d42e7dSPeter Dunlap default: 2442a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2443a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_REJECTED); 2444a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2445a6d42e7dSPeter Dunlap return; 2446a6d42e7dSPeter Dunlap } 2447a6d42e7dSPeter Dunlap 2448a6d42e7dSPeter Dunlap tm_itask = iscsit_tm_task_alloc(ict); 2449a6d42e7dSPeter Dunlap if (tm_itask == NULL) { 2450a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2451a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_REJECTED); 2452a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2453a6d42e7dSPeter Dunlap return; 2454a6d42e7dSPeter Dunlap } 2455a6d42e7dSPeter Dunlap 2456a6d42e7dSPeter Dunlap 2457a6d42e7dSPeter Dunlap task = stmf_task_alloc(ict->ict_sess->ist_lport, 2458a6d42e7dSPeter Dunlap ict->ict_sess->ist_stmf_sess, iscsi_tm->lun, 2459a6d42e7dSPeter Dunlap 0, STMF_TASK_EXT_NONE); 2460a6d42e7dSPeter Dunlap if (task == NULL) { 2461a6d42e7dSPeter Dunlap /* 2462a6d42e7dSPeter Dunlap * If this happens, either the LU is in reset, couldn't 2463a6d42e7dSPeter Dunlap * get memory, or some other condition in which we simply 2464a6d42e7dSPeter Dunlap * can't complete this request. It would be nice to return 2465a6d42e7dSPeter Dunlap * an error code like "busy" but the closest we have is 2466a6d42e7dSPeter Dunlap * "rejected". 2467a6d42e7dSPeter Dunlap */ 2468a6d42e7dSPeter Dunlap iscsit_send_task_mgmt_resp(tm_resp_pdu, 2469a6d42e7dSPeter Dunlap SCSI_TCP_TM_RESP_REJECTED); 2470a6d42e7dSPeter Dunlap iscsit_tm_task_free(tm_itask); 2471a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2472a6d42e7dSPeter Dunlap return; 2473a6d42e7dSPeter Dunlap } 2474a6d42e7dSPeter Dunlap 2475a6d42e7dSPeter Dunlap tm_itask->it_tm_pdu = tm_resp_pdu; 2476a6d42e7dSPeter Dunlap tm_itask->it_stmf_task = task; 2477a6d42e7dSPeter Dunlap task->task_port_private = tm_itask; 2478a6d42e7dSPeter Dunlap task->task_mgmt_function = tm_func; 2479a6d42e7dSPeter Dunlap task->task_additional_flags = TASK_AF_NO_EXPECTED_XFER_LENGTH; 2480a6d42e7dSPeter Dunlap task->task_priority = 0; 2481a6d42e7dSPeter Dunlap task->task_max_nbufs = STMF_BUFS_MAX; 2482a6d42e7dSPeter Dunlap task->task_cmd_seq_no = iscsi_tm->itt; 2483a6d42e7dSPeter Dunlap task->task_expected_xfer_length = 0; 2484a6d42e7dSPeter Dunlap 2485a6d42e7dSPeter Dunlap stmf_post_task(task, NULL); 2486a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2487a6d42e7dSPeter Dunlap } 2488a6d42e7dSPeter Dunlap 2489a6d42e7dSPeter Dunlap static void 2490a6d42e7dSPeter Dunlap iscsit_pdu_op_noop(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2491a6d42e7dSPeter Dunlap { 2492a6d42e7dSPeter Dunlap iscsi_nop_out_hdr_t *out = (iscsi_nop_out_hdr_t *)rx_pdu->isp_hdr; 2493a6d42e7dSPeter Dunlap iscsi_nop_in_hdr_t *in; 2494a6d42e7dSPeter Dunlap int resp_datalen; 2495a6d42e7dSPeter Dunlap idm_pdu_t *resp; 2496a6d42e7dSPeter Dunlap 2497a6d42e7dSPeter Dunlap /* Ignore the response from initiator */ 249872cf3143Speter dunlap if ((out->itt == ISCSI_RSVD_TASK_TAG) || 249972cf3143Speter dunlap (out->ttt != ISCSI_RSVD_TASK_TAG)) { 250072cf3143Speter dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2501a6d42e7dSPeter Dunlap return; 250272cf3143Speter dunlap } 2503a6d42e7dSPeter Dunlap 2504a6d42e7dSPeter Dunlap /* Allocate a PDU to respond */ 2505a6d42e7dSPeter Dunlap resp_datalen = ntoh24(out->dlength); 2506a6d42e7dSPeter Dunlap resp = idm_pdu_alloc(sizeof (iscsi_hdr_t), resp_datalen); 2507a6d42e7dSPeter Dunlap idm_pdu_init(resp, ict->ict_ic, NULL, NULL); 2508a6d42e7dSPeter Dunlap if (resp_datalen > 0) { 2509a6d42e7dSPeter Dunlap bcopy(rx_pdu->isp_data, resp->isp_data, resp_datalen); 2510a6d42e7dSPeter Dunlap } 2511a6d42e7dSPeter Dunlap 251260220f10SPriya Krishnan /* 251360220f10SPriya Krishnan * When sending a NOP-In as a response to a NOP-Out from the initiator, 251460220f10SPriya Krishnan * the target must respond with the same initiator task tag that was 251560220f10SPriya Krishnan * provided in the NOP-Out request, the target transfer tag must be 251660220f10SPriya Krishnan * ISCSI_RSVD_TASK_TAG (0xffffffff) and StatSN will contain the next 251760220f10SPriya Krishnan * status sequence number. The StatSN for the connection is advanced 251860220f10SPriya Krishnan * after this PDU is sent. 251960220f10SPriya Krishnan */ 2520a6d42e7dSPeter Dunlap in = (iscsi_nop_in_hdr_t *)resp->isp_hdr; 2521a6d42e7dSPeter Dunlap bzero(in, sizeof (*in)); 2522a6d42e7dSPeter Dunlap in->opcode = ISCSI_OP_NOOP_IN; 2523a6d42e7dSPeter Dunlap in->flags = ISCSI_FLAG_FINAL; 2524a6d42e7dSPeter Dunlap bcopy(out->lun, in->lun, 8); 2525a6d42e7dSPeter Dunlap in->itt = out->itt; 2526a6d42e7dSPeter Dunlap in->ttt = ISCSI_RSVD_TASK_TAG; 2527a6d42e7dSPeter Dunlap hton24(in->dlength, resp_datalen); 252860220f10SPriya Krishnan resp->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 2529a6d42e7dSPeter Dunlap /* Any other field in resp to be set? */ 2530a6d42e7dSPeter Dunlap iscsit_pdu_tx(resp); 2531a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2532a6d42e7dSPeter Dunlap } 2533a6d42e7dSPeter Dunlap 2534a6d42e7dSPeter Dunlap static void 2535a6d42e7dSPeter Dunlap iscsit_pdu_op_login_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2536a6d42e7dSPeter Dunlap { 2537a6d42e7dSPeter Dunlap 2538a6d42e7dSPeter Dunlap /* 2539a6d42e7dSPeter Dunlap * Submit PDU to login state machine. State machine will free the 2540a6d42e7dSPeter Dunlap * PDU. 2541a6d42e7dSPeter Dunlap */ 2542a6d42e7dSPeter Dunlap iscsit_login_sm_event(ict, ILE_LOGIN_RCV, rx_pdu); 2543a6d42e7dSPeter Dunlap } 2544a6d42e7dSPeter Dunlap 2545a6d42e7dSPeter Dunlap void 2546a6d42e7dSPeter Dunlap iscsit_pdu_op_logout_cmd(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2547a6d42e7dSPeter Dunlap { 2548a6d42e7dSPeter Dunlap iscsi_logout_hdr_t *logout_req = 2549a6d42e7dSPeter Dunlap (iscsi_logout_hdr_t *)rx_pdu->isp_hdr; 2550a6d42e7dSPeter Dunlap iscsi_logout_rsp_hdr_t *logout_rsp; 2551a6d42e7dSPeter Dunlap idm_pdu_t *resp; 2552a6d42e7dSPeter Dunlap 2553a6d42e7dSPeter Dunlap /* Allocate a PDU to respond */ 2554a6d42e7dSPeter Dunlap resp = idm_pdu_alloc(sizeof (iscsi_hdr_t), 0); 2555a6d42e7dSPeter Dunlap idm_pdu_init(resp, ict->ict_ic, NULL, NULL); 255660220f10SPriya Krishnan /* 255760220f10SPriya Krishnan * The StatSN is to be sent to the initiator, 255860220f10SPriya Krishnan * it is not required to increment the number 255960220f10SPriya Krishnan * as the connection is terminating. 256060220f10SPriya Krishnan */ 256160220f10SPriya Krishnan resp->isp_flags |= IDM_PDU_SET_STATSN; 2562a6d42e7dSPeter Dunlap /* 2563a6d42e7dSPeter Dunlap * Logout results in the immediate termination of all tasks except 2564a6d42e7dSPeter Dunlap * if the logout reason is ISCSI_LOGOUT_REASON_RECOVERY. The 2565a6d42e7dSPeter Dunlap * connection state machine will drive this task cleanup automatically 2566a6d42e7dSPeter Dunlap * so we don't need to handle that here. 2567a6d42e7dSPeter Dunlap */ 2568a6d42e7dSPeter Dunlap logout_rsp = (iscsi_logout_rsp_hdr_t *)resp->isp_hdr; 2569a6d42e7dSPeter Dunlap bzero(logout_rsp, sizeof (*logout_rsp)); 2570a6d42e7dSPeter Dunlap logout_rsp->opcode = ISCSI_OP_LOGOUT_RSP; 2571a6d42e7dSPeter Dunlap logout_rsp->flags = ISCSI_FLAG_FINAL; 2572a6d42e7dSPeter Dunlap logout_rsp->itt = logout_req->itt; 2573a6d42e7dSPeter Dunlap if ((logout_req->flags & ISCSI_FLAG_LOGOUT_REASON_MASK) > 2574a6d42e7dSPeter Dunlap ISCSI_LOGOUT_REASON_RECOVERY) { 2575a6d42e7dSPeter Dunlap logout_rsp->response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; 2576a6d42e7dSPeter Dunlap } else { 2577a6d42e7dSPeter Dunlap logout_rsp->response = ISCSI_LOGOUT_SUCCESS; 2578a6d42e7dSPeter Dunlap } 2579a6d42e7dSPeter Dunlap 2580a6d42e7dSPeter Dunlap iscsit_pdu_tx(resp); 2581a6d42e7dSPeter Dunlap idm_pdu_complete(rx_pdu, IDM_STATUS_SUCCESS); 2582a6d42e7dSPeter Dunlap } 2583a6d42e7dSPeter Dunlap 2584a6d42e7dSPeter Dunlap /* 2585a6d42e7dSPeter Dunlap * Calculate the number of outstanding commands we can process 2586a6d42e7dSPeter Dunlap */ 2587a6d42e7dSPeter Dunlap int 2588a6d42e7dSPeter Dunlap iscsit_cmd_window() 2589a6d42e7dSPeter Dunlap { 2590*d618d68dSPriya Krishnan /* 2591*d618d68dSPriya Krishnan * Instead of using a pre-defined constant for the command window, 2592*d618d68dSPriya Krishnan * it should be made confiurable and dynamic. With MC/S, sequence 2593*d618d68dSPriya Krishnan * numbers will be used up at a much faster rate than with SC/S. 2594*d618d68dSPriya Krishnan */ 2595*d618d68dSPriya Krishnan return (ISCSIT_MAX_WINDOW); 2596a6d42e7dSPeter Dunlap } 2597a6d42e7dSPeter Dunlap 2598a6d42e7dSPeter Dunlap /* 2599a6d42e7dSPeter Dunlap * Set local registers based on incoming PDU 2600a6d42e7dSPeter Dunlap */ 2601a6d42e7dSPeter Dunlap void 2602a6d42e7dSPeter Dunlap iscsit_set_cmdsn(iscsit_conn_t *ict, idm_pdu_t *rx_pdu) 2603a6d42e7dSPeter Dunlap { 2604a6d42e7dSPeter Dunlap iscsit_sess_t *ist; 2605a6d42e7dSPeter Dunlap iscsi_scsi_cmd_hdr_t *req; 2606a6d42e7dSPeter Dunlap 2607a6d42e7dSPeter Dunlap ist = ict->ict_sess; 2608a6d42e7dSPeter Dunlap 2609a6d42e7dSPeter Dunlap req = (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 2610*d618d68dSPriya Krishnan if (req->opcode & ISCSI_OP_IMMEDIATE) { 2611*d618d68dSPriya Krishnan /* no cmdsn increment for immediate PDUs */ 2612*d618d68dSPriya Krishnan return; 2613*d618d68dSPriya Krishnan } 2614a6d42e7dSPeter Dunlap 2615*d618d68dSPriya Krishnan /* Ensure that the ExpCmdSN advances in an orderly manner */ 2616*d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 2617a6d42e7dSPeter Dunlap ist->ist_expcmdsn = ntohl(req->cmdsn) + 1; 2618a6d42e7dSPeter Dunlap ist->ist_maxcmdsn = ntohl(req->cmdsn) + iscsit_cmd_window(); 2619*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 2620a6d42e7dSPeter Dunlap } 2621a6d42e7dSPeter Dunlap 2622a6d42e7dSPeter Dunlap /* 2623a6d42e7dSPeter Dunlap * Wrapper funtion, calls iscsi_calc_rspsn and idm_pdu_tx 2624a6d42e7dSPeter Dunlap */ 2625a6d42e7dSPeter Dunlap void 2626a6d42e7dSPeter Dunlap iscsit_pdu_tx(idm_pdu_t *pdu) 2627a6d42e7dSPeter Dunlap { 2628a6d42e7dSPeter Dunlap iscsit_conn_t *ict = pdu->isp_ic->ic_handle; 262960220f10SPriya Krishnan iscsi_scsi_rsp_hdr_t *rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 263060220f10SPriya Krishnan iscsit_sess_t *ist = ict->ict_sess; 2631a6d42e7dSPeter Dunlap 2632a6d42e7dSPeter Dunlap /* 263360220f10SPriya Krishnan * The command sequence numbers are session-wide and must stay 263460220f10SPriya Krishnan * consistent across the transfer, so protect the cmdsn with a 2635*d618d68dSPriya Krishnan * mutex lock on the session. The status sequence number will 263660220f10SPriya Krishnan * be updated just before the transport layer transmits the PDU. 2637a6d42e7dSPeter Dunlap */ 263860220f10SPriya Krishnan 2639*d618d68dSPriya Krishnan mutex_enter(&ict->ict_sess->ist_sn_mutex); 264060220f10SPriya Krishnan /* Set ExpCmdSN and MaxCmdSN */ 264160220f10SPriya Krishnan rsp->maxcmdsn = htonl(ist->ist_maxcmdsn); 264260220f10SPriya Krishnan rsp->expcmdsn = htonl(ist->ist_expcmdsn); 2643a6d42e7dSPeter Dunlap idm_pdu_tx(pdu); 2644*d618d68dSPriya Krishnan mutex_exit(&ict->ict_sess->ist_sn_mutex); 2645a6d42e7dSPeter Dunlap } 2646a6d42e7dSPeter Dunlap 2647a6d42e7dSPeter Dunlap /* 2648a6d42e7dSPeter Dunlap * Internal functions 2649a6d42e7dSPeter Dunlap */ 2650a6d42e7dSPeter Dunlap 2651a6d42e7dSPeter Dunlap void 2652a6d42e7dSPeter Dunlap iscsit_send_async_event(iscsit_conn_t *ict, uint8_t event) 2653a6d42e7dSPeter Dunlap { 2654a6d42e7dSPeter Dunlap idm_pdu_t *abt; 2655a6d42e7dSPeter Dunlap iscsi_async_evt_hdr_t *async_abt; 2656a6d42e7dSPeter Dunlap 2657a6d42e7dSPeter Dunlap /* 2658a6d42e7dSPeter Dunlap * Get a PDU to build the abort request. 2659a6d42e7dSPeter Dunlap */ 2660a6d42e7dSPeter Dunlap abt = idm_pdu_alloc(sizeof (iscsi_hdr_t), 0); 2661a6d42e7dSPeter Dunlap if (abt == NULL) { 2662a6d42e7dSPeter Dunlap idm_conn_event(ict->ict_ic, CE_TRANSPORT_FAIL, NULL); 2663a6d42e7dSPeter Dunlap return; 2664a6d42e7dSPeter Dunlap } 2665a6d42e7dSPeter Dunlap 266660220f10SPriya Krishnan /* 266760220f10SPriya Krishnan * A asynchronous message is sent by the target to request a logout. 266860220f10SPriya Krishnan * The StatSN for the connection is advanced after the PDU is sent 266960220f10SPriya Krishnan * to allow for initiator and target state synchronization. 267060220f10SPriya Krishnan */ 267172cf3143Speter dunlap idm_pdu_init(abt, ict->ict_ic, NULL, NULL); 2672a6d42e7dSPeter Dunlap abt->isp_datalen = 0; 267360220f10SPriya Krishnan abt->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 2674a6d42e7dSPeter Dunlap 2675a6d42e7dSPeter Dunlap async_abt = (iscsi_async_evt_hdr_t *)abt->isp_hdr; 2676a6d42e7dSPeter Dunlap bzero(async_abt, sizeof (*async_abt)); 2677a6d42e7dSPeter Dunlap async_abt->opcode = ISCSI_OP_ASYNC_EVENT; 2678a6d42e7dSPeter Dunlap async_abt->async_event = event; 2679a6d42e7dSPeter Dunlap async_abt->flags = ISCSI_FLAG_FINAL; 2680a6d42e7dSPeter Dunlap async_abt->rsvd4[0] = 0xff; 2681a6d42e7dSPeter Dunlap async_abt->rsvd4[1] = 0xff; 2682a6d42e7dSPeter Dunlap async_abt->rsvd4[2] = 0xff; 2683a6d42e7dSPeter Dunlap async_abt->rsvd4[3] = 0xff; 2684a6d42e7dSPeter Dunlap 2685a6d42e7dSPeter Dunlap switch (event) { 2686a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_REQUEST_LOGOUT: 2687a6d42e7dSPeter Dunlap async_abt->param3 = htons(IDM_LOGOUT_SECONDS); 2688a6d42e7dSPeter Dunlap break; 2689a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_SCSI_EVENT: 2690a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_DROPPING_CONNECTION: 2691a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_DROPPING_ALL_CONNECTIONS: 2692a6d42e7dSPeter Dunlap case ISCSI_ASYNC_EVENT_PARAM_NEGOTIATION: 2693a6d42e7dSPeter Dunlap default: 2694a6d42e7dSPeter Dunlap ASSERT(0); 2695a6d42e7dSPeter Dunlap } 2696a6d42e7dSPeter Dunlap 2697a6d42e7dSPeter Dunlap iscsit_pdu_tx(abt); 2698a6d42e7dSPeter Dunlap } 2699a6d42e7dSPeter Dunlap 270072cf3143Speter dunlap void 270172cf3143Speter dunlap iscsit_send_reject(iscsit_conn_t *ict, idm_pdu_t *rejected_pdu, uint8_t reason) 270272cf3143Speter dunlap { 270372cf3143Speter dunlap idm_pdu_t *reject_pdu; 270472cf3143Speter dunlap iscsi_reject_rsp_hdr_t *reject; 270572cf3143Speter dunlap 270672cf3143Speter dunlap /* 270772cf3143Speter dunlap * Get a PDU to build the abort request. 270872cf3143Speter dunlap */ 270972cf3143Speter dunlap reject_pdu = idm_pdu_alloc(sizeof (iscsi_hdr_t), 271072cf3143Speter dunlap rejected_pdu->isp_hdrlen); 271172cf3143Speter dunlap if (reject_pdu == NULL) { 271272cf3143Speter dunlap idm_conn_event(ict->ict_ic, CE_TRANSPORT_FAIL, NULL); 271372cf3143Speter dunlap return; 271472cf3143Speter dunlap } 271572cf3143Speter dunlap idm_pdu_init(reject_pdu, ict->ict_ic, NULL, NULL); 271660220f10SPriya Krishnan /* StatSN is advanced after a Reject PDU */ 271760220f10SPriya Krishnan reject_pdu->isp_flags |= IDM_PDU_SET_STATSN | IDM_PDU_ADVANCE_STATSN; 271872cf3143Speter dunlap reject_pdu->isp_datalen = rejected_pdu->isp_hdrlen; 271972cf3143Speter dunlap bcopy(rejected_pdu->isp_hdr, reject_pdu->isp_data, 272072cf3143Speter dunlap rejected_pdu->isp_hdrlen); 272172cf3143Speter dunlap 272272cf3143Speter dunlap reject = (iscsi_reject_rsp_hdr_t *)reject_pdu->isp_hdr; 272372cf3143Speter dunlap bzero(reject, sizeof (*reject)); 272472cf3143Speter dunlap reject->opcode = ISCSI_OP_REJECT_MSG; 272572cf3143Speter dunlap reject->reason = reason; 272672cf3143Speter dunlap reject->flags = ISCSI_FLAG_FINAL; 272772cf3143Speter dunlap hton24(reject->dlength, rejected_pdu->isp_hdrlen); 272872cf3143Speter dunlap reject->must_be_ff[0] = 0xff; 272972cf3143Speter dunlap reject->must_be_ff[1] = 0xff; 273072cf3143Speter dunlap reject->must_be_ff[2] = 0xff; 273172cf3143Speter dunlap reject->must_be_ff[3] = 0xff; 273272cf3143Speter dunlap 273372cf3143Speter dunlap iscsit_pdu_tx(reject_pdu); 273472cf3143Speter dunlap } 273572cf3143Speter dunlap 2736a6d42e7dSPeter Dunlap 2737a6d42e7dSPeter Dunlap static iscsit_task_t * 2738a6d42e7dSPeter Dunlap iscsit_task_alloc(iscsit_conn_t *ict) 2739a6d42e7dSPeter Dunlap { 2740a6d42e7dSPeter Dunlap iscsit_task_t *itask; 2741a6d42e7dSPeter Dunlap iscsit_buf_t *immed_ibuf; 2742a6d42e7dSPeter Dunlap 2743a6d42e7dSPeter Dunlap /* 2744a6d42e7dSPeter Dunlap * Possible items to pre-alloc if we cache iscsit_task_t's: 2745a6d42e7dSPeter Dunlap * 2746a6d42e7dSPeter Dunlap * Status PDU w/ sense buffer 2747a6d42e7dSPeter Dunlap * stmf_data_buf_t for immediate data 2748a6d42e7dSPeter Dunlap */ 2749a6d42e7dSPeter Dunlap itask = kmem_alloc(sizeof (iscsit_task_t) + sizeof (iscsit_buf_t) + 2750a6d42e7dSPeter Dunlap sizeof (stmf_data_buf_t), KM_NOSLEEP); 2751a6d42e7dSPeter Dunlap if (itask != NULL) { 2752a6d42e7dSPeter Dunlap mutex_init(&itask->it_mutex, NULL, MUTEX_DRIVER, NULL); 2753a6d42e7dSPeter Dunlap itask->it_aborted = itask->it_stmf_abort = 2754a6d42e7dSPeter Dunlap itask->it_tm_task = 0; 2755a6d42e7dSPeter Dunlap 2756a6d42e7dSPeter Dunlap immed_ibuf = (iscsit_buf_t *)(itask + 1); 2757a6d42e7dSPeter Dunlap bzero(immed_ibuf, sizeof (*immed_ibuf)); 2758a6d42e7dSPeter Dunlap immed_ibuf->ibuf_is_immed = B_TRUE; 2759a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf = (stmf_data_buf_t *)(immed_ibuf + 1); 2760a6d42e7dSPeter Dunlap 2761a6d42e7dSPeter Dunlap bzero(immed_ibuf->ibuf_stmf_buf, sizeof (stmf_data_buf_t)); 2762a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf->db_port_private = immed_ibuf; 2763a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf->db_sglist_length = 1; 2764a6d42e7dSPeter Dunlap immed_ibuf->ibuf_stmf_buf->db_flags = DB_DIRECTION_FROM_RPORT | 2765a6d42e7dSPeter Dunlap DB_DONT_CACHE; 2766a6d42e7dSPeter Dunlap itask->it_immed_data = immed_ibuf; 2767a6d42e7dSPeter Dunlap itask->it_idm_task = idm_task_alloc(ict->ict_ic); 2768a6d42e7dSPeter Dunlap if (itask->it_idm_task != NULL) { 2769a6d42e7dSPeter Dunlap itask->it_idm_task->idt_private = itask; 2770a6d42e7dSPeter Dunlap itask->it_ict = ict; 2771a6d42e7dSPeter Dunlap itask->it_ttt = itask->it_idm_task->idt_tt; 2772a6d42e7dSPeter Dunlap return (itask); 2773a6d42e7dSPeter Dunlap } else { 2774a6d42e7dSPeter Dunlap kmem_free(itask, sizeof (iscsit_task_t) + 2775a6d42e7dSPeter Dunlap sizeof (iscsit_buf_t) + sizeof (stmf_data_buf_t)); 2776a6d42e7dSPeter Dunlap } 2777a6d42e7dSPeter Dunlap } 2778a6d42e7dSPeter Dunlap 2779a6d42e7dSPeter Dunlap return (NULL); 2780a6d42e7dSPeter Dunlap } 2781a6d42e7dSPeter Dunlap 2782a6d42e7dSPeter Dunlap static void 2783a6d42e7dSPeter Dunlap iscsit_task_free(iscsit_task_t *itask) 2784a6d42e7dSPeter Dunlap { 2785a6d42e7dSPeter Dunlap idm_task_free(itask->it_idm_task); 2786a6d42e7dSPeter Dunlap mutex_destroy(&itask->it_mutex); 2787a6d42e7dSPeter Dunlap kmem_free(itask, sizeof (iscsit_task_t) + 2788a6d42e7dSPeter Dunlap sizeof (iscsit_buf_t) + sizeof (stmf_data_buf_t)); 2789a6d42e7dSPeter Dunlap } 2790a6d42e7dSPeter Dunlap 2791a6d42e7dSPeter Dunlap static iscsit_task_t * 2792a6d42e7dSPeter Dunlap iscsit_tm_task_alloc(iscsit_conn_t *ict) 2793a6d42e7dSPeter Dunlap { 2794a6d42e7dSPeter Dunlap iscsit_task_t *itask; 2795a6d42e7dSPeter Dunlap 2796a6d42e7dSPeter Dunlap itask = kmem_zalloc(sizeof (iscsit_task_t), KM_NOSLEEP); 2797a6d42e7dSPeter Dunlap if (itask != NULL) { 2798a6d42e7dSPeter Dunlap idm_conn_hold(ict->ict_ic); 2799a6d42e7dSPeter Dunlap mutex_init(&itask->it_mutex, NULL, MUTEX_DRIVER, NULL); 2800a6d42e7dSPeter Dunlap itask->it_aborted = itask->it_stmf_abort = 2801a6d42e7dSPeter Dunlap itask->it_tm_responded = 0; 2802a6d42e7dSPeter Dunlap itask->it_tm_pdu = NULL; 2803a6d42e7dSPeter Dunlap itask->it_tm_task = 1; 2804a6d42e7dSPeter Dunlap itask->it_ict = ict; 2805a6d42e7dSPeter Dunlap } 2806a6d42e7dSPeter Dunlap 2807a6d42e7dSPeter Dunlap return (itask); 2808a6d42e7dSPeter Dunlap } 2809a6d42e7dSPeter Dunlap 2810a6d42e7dSPeter Dunlap static void 2811a6d42e7dSPeter Dunlap iscsit_tm_task_free(iscsit_task_t *itask) 2812a6d42e7dSPeter Dunlap { 2813a6d42e7dSPeter Dunlap /* 2814a6d42e7dSPeter Dunlap * If we responded then the call to idm_pdu_complete will free the 2815a6d42e7dSPeter Dunlap * PDU. Otherwise we got aborted before the TM function could 2816a6d42e7dSPeter Dunlap * complete and we need to free the PDU explicitly. 2817a6d42e7dSPeter Dunlap */ 2818a6d42e7dSPeter Dunlap if (itask->it_tm_pdu != NULL && !itask->it_tm_responded) 2819a6d42e7dSPeter Dunlap idm_pdu_free(itask->it_tm_pdu); 2820a6d42e7dSPeter Dunlap idm_conn_rele(itask->it_ict->ict_ic); 2821a6d42e7dSPeter Dunlap mutex_destroy(&itask->it_mutex); 2822a6d42e7dSPeter Dunlap kmem_free(itask, sizeof (iscsit_task_t)); 2823a6d42e7dSPeter Dunlap } 2824a6d42e7dSPeter Dunlap 282572cf3143Speter dunlap static idm_status_t 282672cf3143Speter dunlap iscsit_task_start(iscsit_task_t *itask) 282772cf3143Speter dunlap { 282872cf3143Speter dunlap iscsit_sess_t *ist = itask->it_ict->ict_sess; 282972cf3143Speter dunlap avl_index_t where; 283072cf3143Speter dunlap 283172cf3143Speter dunlap /* 283272cf3143Speter dunlap * Sanity check the ITT and ensure that this task does not already 283372cf3143Speter dunlap * exist. If not then add the task to the session task list. 283472cf3143Speter dunlap */ 283572cf3143Speter dunlap mutex_enter(&ist->ist_mutex); 283672cf3143Speter dunlap mutex_enter(&itask->it_mutex); 283772cf3143Speter dunlap itask->it_active = 1; 283872cf3143Speter dunlap if (avl_find(&ist->ist_task_list, itask, &where) == NULL) { 283972cf3143Speter dunlap /* New task, add to AVL */ 284072cf3143Speter dunlap avl_insert(&ist->ist_task_list, itask, where); 284172cf3143Speter dunlap mutex_exit(&itask->it_mutex); 284272cf3143Speter dunlap mutex_exit(&ist->ist_mutex); 284372cf3143Speter dunlap return (IDM_STATUS_SUCCESS); 284472cf3143Speter dunlap } 284572cf3143Speter dunlap mutex_exit(&itask->it_mutex); 284672cf3143Speter dunlap mutex_exit(&ist->ist_mutex); 284772cf3143Speter dunlap 284872cf3143Speter dunlap return (IDM_STATUS_REJECT); 284972cf3143Speter dunlap } 285072cf3143Speter dunlap 285172cf3143Speter dunlap static void 285272cf3143Speter dunlap iscsit_task_done(iscsit_task_t *itask) 285372cf3143Speter dunlap { 285472cf3143Speter dunlap iscsit_sess_t *ist = itask->it_ict->ict_sess; 285572cf3143Speter dunlap 285672cf3143Speter dunlap mutex_enter(&ist->ist_mutex); 285772cf3143Speter dunlap mutex_enter(&itask->it_mutex); 285872cf3143Speter dunlap if (itask->it_active) { 285972cf3143Speter dunlap avl_remove(&ist->ist_task_list, itask); 286072cf3143Speter dunlap itask->it_active = 0; 286172cf3143Speter dunlap } 286272cf3143Speter dunlap mutex_exit(&itask->it_mutex); 286372cf3143Speter dunlap mutex_exit(&ist->ist_mutex); 286472cf3143Speter dunlap } 286572cf3143Speter dunlap 2866a6d42e7dSPeter Dunlap /* 2867a6d42e7dSPeter Dunlap * iscsit status PDU cache 2868a6d42e7dSPeter Dunlap */ 2869a6d42e7dSPeter Dunlap 2870a6d42e7dSPeter Dunlap /*ARGSUSED*/ 2871a6d42e7dSPeter Dunlap static int 2872a6d42e7dSPeter Dunlap iscsit_status_pdu_constructor(void *pdu_void, void *arg, int flags) 2873a6d42e7dSPeter Dunlap { 2874a6d42e7dSPeter Dunlap idm_pdu_t *pdu = pdu_void; 2875a6d42e7dSPeter Dunlap iscsi_scsi_rsp_hdr_t *rsp; 2876a6d42e7dSPeter Dunlap 2877a6d42e7dSPeter Dunlap bzero(pdu, sizeof (idm_pdu_t)); 2878a6d42e7dSPeter Dunlap pdu->isp_callback = iscsit_send_good_status_done; 2879a6d42e7dSPeter Dunlap pdu->isp_magic = IDM_PDU_MAGIC; 2880a6d42e7dSPeter Dunlap pdu->isp_hdr = (iscsi_hdr_t *)(pdu + 1); /* Ptr arithmetic */ 2881a6d42e7dSPeter Dunlap pdu->isp_hdrlen = sizeof (iscsi_hdr_t); 2882a6d42e7dSPeter Dunlap 2883a6d42e7dSPeter Dunlap /* Setup status response */ 2884a6d42e7dSPeter Dunlap rsp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 2885a6d42e7dSPeter Dunlap bzero(rsp, sizeof (*rsp)); 2886a6d42e7dSPeter Dunlap rsp->opcode = ISCSI_OP_SCSI_RSP; 2887a6d42e7dSPeter Dunlap rsp->flags = ISCSI_FLAG_FINAL; 2888a6d42e7dSPeter Dunlap rsp->response = ISCSI_STATUS_CMD_COMPLETED; 2889a6d42e7dSPeter Dunlap 2890a6d42e7dSPeter Dunlap return (0); 2891a6d42e7dSPeter Dunlap } 2892a6d42e7dSPeter Dunlap 2893a6d42e7dSPeter Dunlap /* 2894a6d42e7dSPeter Dunlap * iscsit private data handler 2895a6d42e7dSPeter Dunlap */ 2896a6d42e7dSPeter Dunlap 2897a6d42e7dSPeter Dunlap /*ARGSUSED*/ 2898a6d42e7dSPeter Dunlap static void 2899a6d42e7dSPeter Dunlap iscsit_pp_cb(struct stmf_port_provider *pp, int cmd, void *arg, uint32_t flags) 2900a6d42e7dSPeter Dunlap { 2901a6d42e7dSPeter Dunlap it_config_t *cfg; 2902a6d42e7dSPeter Dunlap nvlist_t *nvl; 29038c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_service_enabled_t old_state; 2904a6d42e7dSPeter Dunlap 2905a6d42e7dSPeter Dunlap if ((cmd != STMF_PROVIDER_DATA_UPDATED) || (arg == NULL)) { 2906a6d42e7dSPeter Dunlap return; 2907a6d42e7dSPeter Dunlap } 2908a6d42e7dSPeter Dunlap 2909a6d42e7dSPeter Dunlap nvl = (nvlist_t *)arg; 2910a6d42e7dSPeter Dunlap 2911a6d42e7dSPeter Dunlap /* Translate nvlist */ 2912a6d42e7dSPeter Dunlap if (it_nv_to_config(nvl, &cfg) != 0) { 2913a6d42e7dSPeter Dunlap cmn_err(CE_WARN, "Configuration is invalid"); 2914a6d42e7dSPeter Dunlap return; 2915a6d42e7dSPeter Dunlap } 2916a6d42e7dSPeter Dunlap 29178c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* Check that no iSCSI ioctl is currently running */ 29188c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 29198c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States old_state = iscsit_global.global_svc_state; 29208c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States switch (iscsit_global.global_svc_state) { 29218c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_ENABLED: 29228c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_DISABLED: 29238c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state = ISE_BUSY; 29248c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States break; 29258c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States case ISE_ENABLING: 29268c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* 29278c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * It is OK for the iscsit_pp_cb to be called from inside of 29288c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * an iSCSI ioctl only if we are currently executing inside 29298c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States * of stmf_register_port_provider. 29308c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States */ 29318c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT((flags & STMF_PCB_PREG_COMPLETE) != 0); 29328c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States break; 29338c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States default: 29348c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States cmn_err(CE_WARN, "iscsit_pp_cb called when global_svc_state" 29358c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States " is not ENABLED(0x%x) -- ignoring", 29368c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state); 29378c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 29388c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States it_config_free_cmn(cfg); 29398c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States return; 29408c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States } 29418c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 29428c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 2943a6d42e7dSPeter Dunlap /* Update config */ 2944a6d42e7dSPeter Dunlap (void) iscsit_config_merge(cfg); 2945a6d42e7dSPeter Dunlap 2946a6d42e7dSPeter Dunlap it_config_free_cmn(cfg); 29478c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States 29488c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States /* Restore old iSCSI driver global state */ 29498c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_enter(&iscsit_global.global_state_mutex); 29508c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States ASSERT(iscsit_global.global_svc_state == ISE_BUSY || 29518c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state == ISE_ENABLING); 29528c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States iscsit_global.global_svc_state = old_state; 29538c629652SPeter Cudhea - Sun Microsystems - Burlington, MA United States mutex_exit(&iscsit_global.global_state_mutex); 2954a6d42e7dSPeter Dunlap } 2955a6d42e7dSPeter Dunlap 2956a6d42e7dSPeter Dunlap 2957a6d42e7dSPeter Dunlap static it_cfg_status_t 2958a6d42e7dSPeter Dunlap iscsit_config_merge(it_config_t *in_cfg) 2959a6d42e7dSPeter Dunlap { 2960a6d42e7dSPeter Dunlap it_cfg_status_t status; 2961a6d42e7dSPeter Dunlap it_config_t *cfg; 2962a6d42e7dSPeter Dunlap it_config_t tmp_cfg; 2963a6d42e7dSPeter Dunlap list_t tpg_del_list; 2964a6d42e7dSPeter Dunlap 2965a6d42e7dSPeter Dunlap if (in_cfg) { 2966a6d42e7dSPeter Dunlap cfg = in_cfg; 2967a6d42e7dSPeter Dunlap } else { 2968a6d42e7dSPeter Dunlap /* Make empty config */ 2969a6d42e7dSPeter Dunlap bzero(&tmp_cfg, sizeof (tmp_cfg)); 2970a6d42e7dSPeter Dunlap cfg = &tmp_cfg; 2971a6d42e7dSPeter Dunlap } 2972a6d42e7dSPeter Dunlap 2973a6d42e7dSPeter Dunlap list_create(&tpg_del_list, sizeof (iscsit_tpg_t), 2974a6d42e7dSPeter Dunlap offsetof(iscsit_tpg_t, tpg_delete_ln)); 2975a6d42e7dSPeter Dunlap 2976a6d42e7dSPeter Dunlap /* 2977a6d42e7dSPeter Dunlap * Update targets, initiator contexts, target portal groups, 2978a6d42e7dSPeter Dunlap * and iSNS client 2979a6d42e7dSPeter Dunlap */ 2980a6d42e7dSPeter Dunlap ISCSIT_GLOBAL_LOCK(RW_WRITER); 2981a6d42e7dSPeter Dunlap if (((status = iscsit_config_merge_tpg(cfg, &tpg_del_list)) 2982a6d42e7dSPeter Dunlap != 0) || 2983a6d42e7dSPeter Dunlap ((status = iscsit_config_merge_tgt(cfg)) != 0) || 2984a6d42e7dSPeter Dunlap ((status = iscsit_config_merge_ini(cfg)) != 0) || 2985a6d42e7dSPeter Dunlap ((status = isnst_config_merge(cfg)) != 0)) { 2986a6d42e7dSPeter Dunlap ISCSIT_GLOBAL_UNLOCK(); 2987a6d42e7dSPeter Dunlap return (status); 2988a6d42e7dSPeter Dunlap } 2989a6d42e7dSPeter Dunlap 2990a6d42e7dSPeter Dunlap /* Update other global config parameters */ 2991a6d42e7dSPeter Dunlap if (iscsit_global.global_props) { 2992a6d42e7dSPeter Dunlap nvlist_free(iscsit_global.global_props); 2993a6d42e7dSPeter Dunlap iscsit_global.global_props = NULL; 2994a6d42e7dSPeter Dunlap } 2995a6d42e7dSPeter Dunlap if (in_cfg) { 2996a6d42e7dSPeter Dunlap (void) nvlist_dup(cfg->config_global_properties, 2997a6d42e7dSPeter Dunlap &iscsit_global.global_props, KM_SLEEP); 2998a6d42e7dSPeter Dunlap } 2999a6d42e7dSPeter Dunlap ISCSIT_GLOBAL_UNLOCK(); 3000a6d42e7dSPeter Dunlap 3001a6d42e7dSPeter Dunlap iscsit_config_destroy_tpgs(&tpg_del_list); 3002a6d42e7dSPeter Dunlap 3003a6d42e7dSPeter Dunlap list_destroy(&tpg_del_list); 3004a6d42e7dSPeter Dunlap 3005a6d42e7dSPeter Dunlap return (ITCFG_SUCCESS); 3006a6d42e7dSPeter Dunlap } 3007a6d42e7dSPeter Dunlap 3008a6d42e7dSPeter Dunlap /* 3009a6d42e7dSPeter Dunlap * iscsit_sna_lt[e] 3010a6d42e7dSPeter Dunlap * 3011a6d42e7dSPeter Dunlap * Compare serial numbers using serial number arithmetic as defined in 3012a6d42e7dSPeter Dunlap * RFC 1982. 3013a6d42e7dSPeter Dunlap * 3014ab003da8SJim Dunham * NOTE: This code is duplicated in the isns server. It ought to be common. 3015a6d42e7dSPeter Dunlap */ 3016a6d42e7dSPeter Dunlap 3017a6d42e7dSPeter Dunlap static int 3018a6d42e7dSPeter Dunlap iscsit_sna_lt(uint32_t sn1, uint32_t sn2) 3019a6d42e7dSPeter Dunlap { 3020a6d42e7dSPeter Dunlap return ((sn1 != sn2) && 3021a6d42e7dSPeter Dunlap (((sn1 < sn2) && ((sn2 - sn1) < ISCSIT_SNA32_CHECK)) || 3022a6d42e7dSPeter Dunlap ((sn1 > sn2) && ((sn1 - sn2) > ISCSIT_SNA32_CHECK)))); 3023a6d42e7dSPeter Dunlap } 3024a6d42e7dSPeter Dunlap 3025a6d42e7dSPeter Dunlap static int 3026a6d42e7dSPeter Dunlap iscsit_sna_lte(uint32_t sn1, uint32_t sn2) 3027a6d42e7dSPeter Dunlap { 3028a6d42e7dSPeter Dunlap return ((sn1 == sn2) || 3029a6d42e7dSPeter Dunlap (((sn1 < sn2) && ((sn2 - sn1) < ISCSIT_SNA32_CHECK)) || 3030a6d42e7dSPeter Dunlap ((sn1 > sn2) && ((sn1 - sn2) > ISCSIT_SNA32_CHECK)))); 3031a6d42e7dSPeter Dunlap } 3032a6d42e7dSPeter Dunlap 3033a6d42e7dSPeter Dunlap 3034a6d42e7dSPeter Dunlap static boolean_t 3035a6d42e7dSPeter Dunlap iscsit_cmdsn_in_window(iscsit_conn_t *ict, uint32_t cmdsn) 3036a6d42e7dSPeter Dunlap { 3037a6d42e7dSPeter Dunlap iscsit_sess_t *ist = ict->ict_sess; 3038a6d42e7dSPeter Dunlap int rval = B_TRUE; 3039a6d42e7dSPeter Dunlap 3040a6d42e7dSPeter Dunlap ist = ict->ict_sess; 3041a6d42e7dSPeter Dunlap 3042*d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3043a6d42e7dSPeter Dunlap 3044a6d42e7dSPeter Dunlap /* 3045a6d42e7dSPeter Dunlap * If cmdsn is less than ist_expcmdsn - iscsit_cmd_window() or 3046a6d42e7dSPeter Dunlap * greater than ist_expcmdsn, it's not in the window. 3047a6d42e7dSPeter Dunlap */ 3048a6d42e7dSPeter Dunlap 3049a6d42e7dSPeter Dunlap if (iscsit_sna_lt(cmdsn, (ist->ist_expcmdsn - iscsit_cmd_window())) || 3050a6d42e7dSPeter Dunlap !iscsit_sna_lte(cmdsn, ist->ist_expcmdsn)) { 3051a6d42e7dSPeter Dunlap rval = B_FALSE; 3052a6d42e7dSPeter Dunlap } 3053a6d42e7dSPeter Dunlap 3054*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3055a6d42e7dSPeter Dunlap 3056a6d42e7dSPeter Dunlap return (rval); 3057a6d42e7dSPeter Dunlap } 3058*d618d68dSPriya Krishnan 3059*d618d68dSPriya Krishnan /* 3060*d618d68dSPriya Krishnan * iscsit_check_cmdsn_and_queue 3061*d618d68dSPriya Krishnan * 3062*d618d68dSPriya Krishnan * Independent of the order in which the iSCSI target receives non-immediate 3063*d618d68dSPriya Krishnan * command PDU across the entire session and any multiple connections within 3064*d618d68dSPriya Krishnan * the session, the target must deliver the commands to the SCSI layer in 3065*d618d68dSPriya Krishnan * CmdSN order. So out-of-order non-immediate commands are queued up on a 3066*d618d68dSPriya Krishnan * session-wide wait queue. Duplicate commands are ignored. 3067*d618d68dSPriya Krishnan * 3068*d618d68dSPriya Krishnan */ 3069*d618d68dSPriya Krishnan static int 3070*d618d68dSPriya Krishnan iscsit_check_cmdsn_and_queue(idm_pdu_t *rx_pdu) 3071*d618d68dSPriya Krishnan { 3072*d618d68dSPriya Krishnan idm_conn_t *ic = rx_pdu->isp_ic; 3073*d618d68dSPriya Krishnan iscsit_conn_t *ict = ic->ic_handle; 3074*d618d68dSPriya Krishnan iscsit_sess_t *ist = ict->ict_sess; 3075*d618d68dSPriya Krishnan iscsi_scsi_cmd_hdr_t *hdr = (iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr; 3076*d618d68dSPriya Krishnan 3077*d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3078*d618d68dSPriya Krishnan if (hdr->opcode & ISCSI_OP_IMMEDIATE) { 3079*d618d68dSPriya Krishnan /* do not queue, handle it immediately */ 3080*d618d68dSPriya Krishnan DTRACE_PROBE2(immediate__cmd, iscsit_sess_t *, ist, 3081*d618d68dSPriya Krishnan idm_pdu_t *, rx_pdu); 3082*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3083*d618d68dSPriya Krishnan return (ISCSIT_CMDSN_EQ_EXPCMDSN); 3084*d618d68dSPriya Krishnan } 3085*d618d68dSPriya Krishnan if (iscsit_sna_lt(ist->ist_expcmdsn, ntohl(hdr->cmdsn))) { 3086*d618d68dSPriya Krishnan /* 3087*d618d68dSPriya Krishnan * Out-of-order commands (cmdSN higher than ExpCmdSN) 3088*d618d68dSPriya Krishnan * are staged on a fixed-size circular buffer until 3089*d618d68dSPriya Krishnan * the missing command is delivered to the SCSI layer. 3090*d618d68dSPriya Krishnan * Irrespective of the order of insertion into the 3091*d618d68dSPriya Krishnan * staging queue, the commands are processed out of the 3092*d618d68dSPriya Krishnan * queue in cmdSN order only. 3093*d618d68dSPriya Krishnan */ 3094*d618d68dSPriya Krishnan rx_pdu->isp_queue_time = ddi_get_time(); 3095*d618d68dSPriya Krishnan iscsit_add_pdu_to_queue(ist, rx_pdu); 3096*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3097*d618d68dSPriya Krishnan return (ISCSIT_CMDSN_GT_EXPCMDSN); 3098*d618d68dSPriya Krishnan } else if (iscsit_sna_lt(ntohl(hdr->cmdsn), ist->ist_expcmdsn)) { 3099*d618d68dSPriya Krishnan DTRACE_PROBE3(cmdsn__lt__expcmdsn, iscsit_sess_t *, ist, 3100*d618d68dSPriya Krishnan iscsit_conn_t *, ict, idm_pdu_t *, rx_pdu); 3101*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3102*d618d68dSPriya Krishnan return (ISCSIT_CMDSN_LT_EXPCMDSN); 3103*d618d68dSPriya Krishnan } else { 3104*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3105*d618d68dSPriya Krishnan return (ISCSIT_CMDSN_EQ_EXPCMDSN); 3106*d618d68dSPriya Krishnan } 3107*d618d68dSPriya Krishnan } 3108*d618d68dSPriya Krishnan 3109*d618d68dSPriya Krishnan /* 3110*d618d68dSPriya Krishnan * iscsit_add_pdu_to_queue() adds PDUs into the array indexed by 3111*d618d68dSPriya Krishnan * their cmdsn value. The length of the array is kept above the 3112*d618d68dSPriya Krishnan * maximum window size. The window keeps the cmdsn within a range 3113*d618d68dSPriya Krishnan * such that there are no collisons. e.g. the assumption is that 3114*d618d68dSPriya Krishnan * the windowing checks make it impossible to receive PDUs that 3115*d618d68dSPriya Krishnan * index into the same location in the array. 3116*d618d68dSPriya Krishnan */ 3117*d618d68dSPriya Krishnan static void 3118*d618d68dSPriya Krishnan iscsit_add_pdu_to_queue(iscsit_sess_t *ist, idm_pdu_t *rx_pdu) 3119*d618d68dSPriya Krishnan { 3120*d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3121*d618d68dSPriya Krishnan iscsit_conn_t *ict = rx_pdu->isp_ic->ic_handle; 3122*d618d68dSPriya Krishnan uint32_t cmdsn = 3123*d618d68dSPriya Krishnan ((iscsi_scsi_cmd_hdr_t *)rx_pdu->isp_hdr)->cmdsn; 3124*d618d68dSPriya Krishnan uint32_t index; 3125*d618d68dSPriya Krishnan 3126*d618d68dSPriya Krishnan ASSERT(MUTEX_HELD(&ist->ist_sn_mutex)); 3127*d618d68dSPriya Krishnan /* 3128*d618d68dSPriya Krishnan * If the connection is being torn down, then 3129*d618d68dSPriya Krishnan * don't add the PDU to the staging queue 3130*d618d68dSPriya Krishnan */ 3131*d618d68dSPriya Krishnan mutex_enter(&ict->ict_mutex); 3132*d618d68dSPriya Krishnan if (ict->ict_lost) { 3133*d618d68dSPriya Krishnan mutex_exit(&ict->ict_mutex); 3134*d618d68dSPriya Krishnan idm_pdu_complete(rx_pdu, IDM_STATUS_FAIL); 3135*d618d68dSPriya Krishnan return; 3136*d618d68dSPriya Krishnan } 3137*d618d68dSPriya Krishnan iscsit_conn_dispatch_hold(ict); 3138*d618d68dSPriya Krishnan mutex_exit(&ict->ict_mutex); 3139*d618d68dSPriya Krishnan 3140*d618d68dSPriya Krishnan index = ntohl(cmdsn) % ISCSIT_RXPDU_QUEUE_LEN; 3141*d618d68dSPriya Krishnan ASSERT(cbuf->cb_buffer[index] == NULL); 3142*d618d68dSPriya Krishnan cbuf->cb_buffer[index] = rx_pdu; 3143*d618d68dSPriya Krishnan cbuf->cb_num_elems++; 3144*d618d68dSPriya Krishnan } 3145*d618d68dSPriya Krishnan 3146*d618d68dSPriya Krishnan static idm_pdu_t * 3147*d618d68dSPriya Krishnan iscsit_remove_pdu_from_queue(iscsit_sess_t *ist, uint32_t cmdsn) 3148*d618d68dSPriya Krishnan { 3149*d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3150*d618d68dSPriya Krishnan idm_pdu_t *pdu = NULL; 3151*d618d68dSPriya Krishnan uint32_t index; 3152*d618d68dSPriya Krishnan 3153*d618d68dSPriya Krishnan ASSERT(MUTEX_HELD(&ist->ist_sn_mutex)); 3154*d618d68dSPriya Krishnan index = cmdsn % ISCSIT_RXPDU_QUEUE_LEN; 3155*d618d68dSPriya Krishnan if ((pdu = cbuf->cb_buffer[index]) != NULL) { 3156*d618d68dSPriya Krishnan ASSERT(cmdsn == 3157*d618d68dSPriya Krishnan ntohl(((iscsi_scsi_cmd_hdr_t *)pdu->isp_hdr)->cmdsn)); 3158*d618d68dSPriya Krishnan cbuf->cb_buffer[index] = NULL; 3159*d618d68dSPriya Krishnan cbuf->cb_num_elems--; 3160*d618d68dSPriya Krishnan return (pdu); 3161*d618d68dSPriya Krishnan } 3162*d618d68dSPriya Krishnan return (NULL); 3163*d618d68dSPriya Krishnan } 3164*d618d68dSPriya Krishnan 3165*d618d68dSPriya Krishnan /* 3166*d618d68dSPriya Krishnan * iscsit_process_pdu_in_queue() finds the next pdu in sequence 3167*d618d68dSPriya Krishnan * and posts it to the SCSI layer 3168*d618d68dSPriya Krishnan */ 3169*d618d68dSPriya Krishnan static void 3170*d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(iscsit_sess_t *ist) 3171*d618d68dSPriya Krishnan { 3172*d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3173*d618d68dSPriya Krishnan idm_pdu_t *pdu = NULL; 3174*d618d68dSPriya Krishnan uint32_t expcmdsn; 3175*d618d68dSPriya Krishnan 3176*d618d68dSPriya Krishnan for (;;) { 3177*d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3178*d618d68dSPriya Krishnan if (cbuf->cb_num_elems == 0) { 3179*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3180*d618d68dSPriya Krishnan break; 3181*d618d68dSPriya Krishnan } 3182*d618d68dSPriya Krishnan expcmdsn = ist->ist_expcmdsn; 3183*d618d68dSPriya Krishnan if ((pdu = iscsit_remove_pdu_from_queue(ist, expcmdsn)) 3184*d618d68dSPriya Krishnan == NULL) { 3185*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3186*d618d68dSPriya Krishnan break; 3187*d618d68dSPriya Krishnan } 3188*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3189*d618d68dSPriya Krishnan iscsit_post_staged_pdu(pdu); 3190*d618d68dSPriya Krishnan } 3191*d618d68dSPriya Krishnan } 3192*d618d68dSPriya Krishnan 3193*d618d68dSPriya Krishnan static void 3194*d618d68dSPriya Krishnan iscsit_post_staged_pdu(idm_pdu_t *rx_pdu) 3195*d618d68dSPriya Krishnan { 3196*d618d68dSPriya Krishnan iscsit_conn_t *ict = rx_pdu->isp_ic->ic_handle; 3197*d618d68dSPriya Krishnan 3198*d618d68dSPriya Krishnan /* Post the PDU to the SCSI layer */ 3199*d618d68dSPriya Krishnan switch (IDM_PDU_OPCODE(rx_pdu)) { 3200*d618d68dSPriya Krishnan case ISCSI_OP_NOOP_OUT: 3201*d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3202*d618d68dSPriya Krishnan iscsit_pdu_op_noop(ict, rx_pdu); 3203*d618d68dSPriya Krishnan break; 3204*d618d68dSPriya Krishnan case ISCSI_OP_TEXT_CMD: 3205*d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3206*d618d68dSPriya Krishnan iscsit_pdu_op_text_cmd(ict, rx_pdu); 3207*d618d68dSPriya Krishnan break; 3208*d618d68dSPriya Krishnan case ISCSI_OP_SCSI_TASK_MGT_MSG: 3209*d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3210*d618d68dSPriya Krishnan iscsit_op_scsi_task_mgmt(ict, rx_pdu); 3211*d618d68dSPriya Krishnan break; 3212*d618d68dSPriya Krishnan case ISCSI_OP_SCSI_CMD: 3213*d618d68dSPriya Krishnan /* cmdSN will be incremented after creating itask */ 3214*d618d68dSPriya Krishnan iscsit_post_scsi_cmd(rx_pdu->isp_ic, rx_pdu); 3215*d618d68dSPriya Krishnan break; 3216*d618d68dSPriya Krishnan case ISCSI_OP_LOGOUT_CMD: 3217*d618d68dSPriya Krishnan iscsit_set_cmdsn(ict, rx_pdu); 3218*d618d68dSPriya Krishnan iscsit_pdu_op_logout_cmd(ict, rx_pdu); 3219*d618d68dSPriya Krishnan break; 3220*d618d68dSPriya Krishnan default: 3221*d618d68dSPriya Krishnan /* No other PDUs should be placed on the queue */ 3222*d618d68dSPriya Krishnan ASSERT(0); 3223*d618d68dSPriya Krishnan } 3224*d618d68dSPriya Krishnan iscsit_conn_dispatch_rele(ict); /* release hold on the conn */ 3225*d618d68dSPriya Krishnan } 3226*d618d68dSPriya Krishnan 3227*d618d68dSPriya Krishnan /* ARGSUSED */ 3228*d618d68dSPriya Krishnan void 3229*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_start(void) 3230*d618d68dSPriya Krishnan { 3231*d618d68dSPriya Krishnan mutex_enter(&iscsit_rxpdu_queue_monitor_mutex); 3232*d618d68dSPriya Krishnan if (iscsit_rxpdu_queue_monitor_thr_running) { 3233*d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3234*d618d68dSPriya Krishnan return; 3235*d618d68dSPriya Krishnan } 3236*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_id = 3237*d618d68dSPriya Krishnan thread_create(NULL, 0, iscsit_rxpdu_queue_monitor, NULL, 3238*d618d68dSPriya Krishnan 0, &p0, TS_RUN, minclsyspri); 3239*d618d68dSPriya Krishnan while (!iscsit_rxpdu_queue_monitor_thr_running) { 3240*d618d68dSPriya Krishnan cv_wait(&iscsit_rxpdu_queue_monitor_cv, 3241*d618d68dSPriya Krishnan &iscsit_rxpdu_queue_monitor_mutex); 3242*d618d68dSPriya Krishnan } 3243*d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3244*d618d68dSPriya Krishnan 3245*d618d68dSPriya Krishnan } 3246*d618d68dSPriya Krishnan 3247*d618d68dSPriya Krishnan /* ARGSUSED */ 3248*d618d68dSPriya Krishnan void 3249*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_stop(void) 3250*d618d68dSPriya Krishnan { 3251*d618d68dSPriya Krishnan mutex_enter(&iscsit_rxpdu_queue_monitor_mutex); 3252*d618d68dSPriya Krishnan if (iscsit_rxpdu_queue_monitor_thr_running) { 3253*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_running = B_FALSE; 3254*d618d68dSPriya Krishnan cv_signal(&iscsit_rxpdu_queue_monitor_cv); 3255*d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3256*d618d68dSPriya Krishnan 3257*d618d68dSPriya Krishnan thread_join(iscsit_rxpdu_queue_monitor_thr_did); 3258*d618d68dSPriya Krishnan return; 3259*d618d68dSPriya Krishnan } 3260*d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3261*d618d68dSPriya Krishnan } 3262*d618d68dSPriya Krishnan 3263*d618d68dSPriya Krishnan /* 3264*d618d68dSPriya Krishnan * A separate thread is used to scan the staging queue on all the 3265*d618d68dSPriya Krishnan * sessions, If a delayed PDU does not arrive within a timeout, the 3266*d618d68dSPriya Krishnan * target will advance to the staged PDU that is next in sequence 3267*d618d68dSPriya Krishnan * and exceeded the threshold wait time. It is up to the initiator 3268*d618d68dSPriya Krishnan * to note that the target has not acknowledged a particular cmdsn 3269*d618d68dSPriya Krishnan * and take appropriate action. 3270*d618d68dSPriya Krishnan */ 3271*d618d68dSPriya Krishnan /* ARGSUSED */ 3272*d618d68dSPriya Krishnan static void 3273*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor(void *arg) 3274*d618d68dSPriya Krishnan { 3275*d618d68dSPriya Krishnan iscsit_tgt_t *tgt; 3276*d618d68dSPriya Krishnan iscsit_sess_t *ist; 3277*d618d68dSPriya Krishnan 3278*d618d68dSPriya Krishnan mutex_enter(&iscsit_rxpdu_queue_monitor_mutex); 3279*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_did = curthread->t_did; 3280*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_thr_running = B_TRUE; 3281*d618d68dSPriya Krishnan cv_signal(&iscsit_rxpdu_queue_monitor_cv); 3282*d618d68dSPriya Krishnan 3283*d618d68dSPriya Krishnan while (iscsit_rxpdu_queue_monitor_thr_running) { 3284*d618d68dSPriya Krishnan ISCSIT_GLOBAL_LOCK(RW_READER); 3285*d618d68dSPriya Krishnan for (tgt = avl_first(&iscsit_global.global_target_list); 3286*d618d68dSPriya Krishnan tgt != NULL; 3287*d618d68dSPriya Krishnan tgt = AVL_NEXT(&iscsit_global.global_target_list, tgt)) { 3288*d618d68dSPriya Krishnan mutex_enter(&tgt->target_mutex); 3289*d618d68dSPriya Krishnan for (ist = avl_first(&tgt->target_sess_list); 3290*d618d68dSPriya Krishnan ist != NULL; 3291*d618d68dSPriya Krishnan ist = AVL_NEXT(&tgt->target_sess_list, ist)) { 3292*d618d68dSPriya Krishnan 3293*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_session(ist); 3294*d618d68dSPriya Krishnan } 3295*d618d68dSPriya Krishnan mutex_exit(&tgt->target_mutex); 3296*d618d68dSPriya Krishnan } 3297*d618d68dSPriya Krishnan ISCSIT_GLOBAL_UNLOCK(); 3298*d618d68dSPriya Krishnan if (iscsit_rxpdu_queue_monitor_thr_running == B_FALSE) { 3299*d618d68dSPriya Krishnan break; 3300*d618d68dSPriya Krishnan } 3301*d618d68dSPriya Krishnan (void) cv_reltimedwait(&iscsit_rxpdu_queue_monitor_cv, 3302*d618d68dSPriya Krishnan &iscsit_rxpdu_queue_monitor_mutex, 3303*d618d68dSPriya Krishnan ISCSIT_RXPDU_QUEUE_MONITOR_INTERVAL * drv_usectohz(1000000), 3304*d618d68dSPriya Krishnan TR_CLOCK_TICK); 3305*d618d68dSPriya Krishnan } 3306*d618d68dSPriya Krishnan mutex_exit(&iscsit_rxpdu_queue_monitor_mutex); 3307*d618d68dSPriya Krishnan thread_exit(); 3308*d618d68dSPriya Krishnan } 3309*d618d68dSPriya Krishnan 3310*d618d68dSPriya Krishnan static void 3311*d618d68dSPriya Krishnan iscsit_rxpdu_queue_monitor_session(iscsit_sess_t *ist) 3312*d618d68dSPriya Krishnan { 3313*d618d68dSPriya Krishnan iscsit_cbuf_t *cbuf = ist->ist_rxpdu_queue; 3314*d618d68dSPriya Krishnan idm_pdu_t *next_pdu = NULL; 3315*d618d68dSPriya Krishnan uint32_t index, next_cmdsn, i; 3316*d618d68dSPriya Krishnan 3317*d618d68dSPriya Krishnan /* 3318*d618d68dSPriya Krishnan * Assume that all PDUs in the staging queue have a cmdsn >= expcmdsn. 3319*d618d68dSPriya Krishnan * Starting with the expcmdsn, iterate over the staged PDUs to find 3320*d618d68dSPriya Krishnan * the next PDU with a wait time greater than the threshold. If found 3321*d618d68dSPriya Krishnan * advance the staged PDU to the SCSI layer, skipping over the missing 3322*d618d68dSPriya Krishnan * PDU(s) to get past the hole in the command sequence. It is up to 3323*d618d68dSPriya Krishnan * the initiator to note that the target has not acknowledged a cmdsn 3324*d618d68dSPriya Krishnan * and take appropriate action. 3325*d618d68dSPriya Krishnan * 3326*d618d68dSPriya Krishnan * Since the PDU(s) arrive in any random order, it is possible that 3327*d618d68dSPriya Krishnan * that the actual wait time for a particular PDU is much longer than 3328*d618d68dSPriya Krishnan * the defined threshold. e.g. Consider a case where commands are sent 3329*d618d68dSPriya Krishnan * over 4 different connections, and cmdsn = 1004 arrives first, then 3330*d618d68dSPriya Krishnan * 1003, and 1002 and 1001 are lost due to a connection failure. 3331*d618d68dSPriya Krishnan * So now 1003 is waiting for 1002 to be delivered, and although the 3332*d618d68dSPriya Krishnan * wait time of 1004 > wait time of 1003, only 1003 will be considered 3333*d618d68dSPriya Krishnan * by the monitor thread. 1004 will be automatically processed by 3334*d618d68dSPriya Krishnan * iscsit_process_pdu_in_queue() once the scan is complete and the 3335*d618d68dSPriya Krishnan * expcmdsn becomes current. 3336*d618d68dSPriya Krishnan */ 3337*d618d68dSPriya Krishnan mutex_enter(&ist->ist_sn_mutex); 3338*d618d68dSPriya Krishnan cbuf = ist->ist_rxpdu_queue; 3339*d618d68dSPriya Krishnan if (cbuf->cb_num_elems == 0) { 3340*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3341*d618d68dSPriya Krishnan return; 3342*d618d68dSPriya Krishnan } 3343*d618d68dSPriya Krishnan for (next_pdu = NULL, i = 0; ; i++) { 3344*d618d68dSPriya Krishnan next_cmdsn = ist->ist_expcmdsn + i; /* start at expcmdsn */ 3345*d618d68dSPriya Krishnan index = next_cmdsn % ISCSIT_RXPDU_QUEUE_LEN; 3346*d618d68dSPriya Krishnan if ((next_pdu = cbuf->cb_buffer[index]) != NULL) { 3347*d618d68dSPriya Krishnan /* 3348*d618d68dSPriya Krishnan * If the PDU wait time has not exceeded threshold 3349*d618d68dSPriya Krishnan * stop scanning the staging queue until the timer 3350*d618d68dSPriya Krishnan * fires again 3351*d618d68dSPriya Krishnan */ 3352*d618d68dSPriya Krishnan if ((ddi_get_time() - next_pdu->isp_queue_time) 3353*d618d68dSPriya Krishnan < rxpdu_queue_threshold) { 3354*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3355*d618d68dSPriya Krishnan return; 3356*d618d68dSPriya Krishnan } 3357*d618d68dSPriya Krishnan /* 3358*d618d68dSPriya Krishnan * Remove the next PDU from the queue and post it 3359*d618d68dSPriya Krishnan * to the SCSI layer, skipping over the missing 3360*d618d68dSPriya Krishnan * PDU. Stop scanning the staging queue until 3361*d618d68dSPriya Krishnan * the monitor timer fires again 3362*d618d68dSPriya Krishnan */ 3363*d618d68dSPriya Krishnan (void) iscsit_remove_pdu_from_queue(ist, next_cmdsn); 3364*d618d68dSPriya Krishnan mutex_exit(&ist->ist_sn_mutex); 3365*d618d68dSPriya Krishnan DTRACE_PROBE3(advanced__to__blocked__cmdsn, 3366*d618d68dSPriya Krishnan iscsit_sess_t *, ist, idm_pdu_t *, next_pdu, 3367*d618d68dSPriya Krishnan uint32_t, next_cmdsn); 3368*d618d68dSPriya Krishnan iscsit_post_staged_pdu(next_pdu); 3369*d618d68dSPriya Krishnan /* Deliver any subsequent PDUs immediately */ 3370*d618d68dSPriya Krishnan iscsit_process_pdu_in_queue(ist); 3371*d618d68dSPriya Krishnan return; 3372*d618d68dSPriya Krishnan } 3373*d618d68dSPriya Krishnan /* 3374*d618d68dSPriya Krishnan * Skipping over i PDUs, e.g. a case where commands 1001 and 3375*d618d68dSPriya Krishnan * 1002 are lost in the network, skip over both and post 1003 3376*d618d68dSPriya Krishnan * expcmdsn then becomes 1004 at the end of the scan. 3377*d618d68dSPriya Krishnan */ 3378*d618d68dSPriya Krishnan DTRACE_PROBE2(skipping__over__cmdsn, iscsit_sess_t *, ist, 3379*d618d68dSPriya Krishnan uint32_t, next_cmdsn); 3380*d618d68dSPriya Krishnan } 3381*d618d68dSPriya Krishnan /* 3382*d618d68dSPriya Krishnan * following the assumption, staged cmdsn >= expcmdsn, this statement 3383*d618d68dSPriya Krishnan * is never reached. 3384*d618d68dSPriya Krishnan */ 3385*d618d68dSPriya Krishnan } 3386