1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 #ifndef _IDM_IMPL_H_ 26 #define _IDM_IMPL_H_ 27 28 #ifdef __cplusplus 29 extern "C" { 30 #endif 31 32 #include <sys/avl.h> 33 #include <sys/socket_impl.h> 34 35 /* 36 * IDM lock order: 37 * 38 * idm_taskid_table_lock, idm_task_t.idt_mutex 39 */ 40 41 #define CF_LOGIN_READY 0x00000001 42 #define CF_INITIAL_LOGIN 0x00000002 43 #define CF_ERROR 0x80000000 44 45 typedef enum { 46 CONN_TYPE_INI = 1, 47 CONN_TYPE_TGT 48 } idm_conn_type_t; 49 50 /* 51 * Watchdog interval in seconds 52 */ 53 #define IDM_WD_INTERVAL 5 54 55 /* 56 * Timeout period before a TRANSPORT_FAIL event is generated in seconds 57 * if the connection is idle. 58 */ 59 #define IDM_TRANSPORT_FAIL_IDLE_TIMEOUT 30 60 61 /* 62 * IDM reference count structure. Audit code is shamelessly adapted 63 * from CIFS server. 64 */ 65 66 #define REFCNT_AUDIT_STACK_DEPTH 16 67 #define REFCNT_AUDIT_BUF_MAX_REC 16 68 69 typedef struct { 70 uint32_t anr_refcnt; 71 int anr_depth; 72 pc_t anr_stack[REFCNT_AUDIT_STACK_DEPTH]; 73 } refcnt_audit_record_t; 74 75 typedef struct { 76 int anb_index; 77 int anb_max_index; 78 refcnt_audit_record_t anb_records[REFCNT_AUDIT_BUF_MAX_REC]; 79 } refcnt_audit_buf_t; 80 81 #define REFCNT_AUDIT(_rf_) { \ 82 refcnt_audit_record_t *anr; \ 83 \ 84 anr = (_rf_)->ir_audit_buf.anb_records; \ 85 anr += (_rf_)->ir_audit_buf.anb_index; \ 86 (_rf_)->ir_audit_buf.anb_index++; \ 87 (_rf_)->ir_audit_buf.anb_index &= \ 88 (_rf_)->ir_audit_buf.anb_max_index; \ 89 anr->anr_refcnt = (_rf_)->ir_refcnt; \ 90 anr->anr_depth = getpcstack(anr->anr_stack, \ 91 REFCNT_AUDIT_STACK_DEPTH); \ 92 } 93 94 struct idm_refcnt_s; 95 96 typedef void (idm_refcnt_cb_t)(void *ref_obj); 97 98 typedef enum { 99 REF_NOWAIT, 100 REF_WAIT_SYNC, 101 REF_WAIT_ASYNC 102 } idm_refcnt_wait_t; 103 104 typedef struct idm_refcnt_s { 105 int ir_refcnt; 106 void *ir_referenced_obj; 107 idm_refcnt_wait_t ir_waiting; 108 kmutex_t ir_mutex; 109 kcondvar_t ir_cv; 110 idm_refcnt_cb_t *ir_cb; 111 refcnt_audit_buf_t ir_audit_buf; 112 } idm_refcnt_t; 113 114 /* 115 * connection parameters - These parameters would be populated at 116 * connection create, or during key-value negotiation at login 117 */ 118 typedef struct idm_conn_params_s { 119 uint32_t max_dataseglen; 120 } idm_conn_param_t; 121 122 typedef struct idm_svc_s { 123 list_node_t is_list_node; 124 kmutex_t is_mutex; 125 kcondvar_t is_cv; 126 kmutex_t is_count_mutex; 127 kcondvar_t is_count_cv; 128 idm_refcnt_t is_refcnt; 129 int is_online; 130 /* transport-specific service components */ 131 void *is_so_svc; 132 void *is_iser_svc; 133 idm_svc_req_t is_svc_req; 134 } idm_svc_t; 135 136 typedef struct idm_conn_s { 137 list_node_t ic_list_node; 138 void *ic_handle; 139 idm_refcnt_t ic_refcnt; 140 idm_svc_t *ic_svc_binding; /* Target conn. only */ 141 idm_sockaddr_t ic_ini_dst_addr; 142 struct sockaddr_storage ic_laddr; /* conn local address */ 143 struct sockaddr_storage ic_raddr; /* conn remote address */ 144 idm_conn_state_t ic_state; 145 idm_conn_state_t ic_last_state; 146 sm_audit_buf_t ic_state_audit; 147 kmutex_t ic_state_mutex; 148 kcondvar_t ic_state_cv; 149 uint32_t ic_state_flags; 150 timeout_id_t ic_state_timeout; 151 struct idm_conn_s *ic_reinstate_conn; /* For conn reinst. */ 152 struct idm_conn_s *ic_logout_conn; /* For other conn logout */ 153 taskq_t *ic_state_taskq; 154 int ic_pdu_events; 155 boolean_t ic_login_info_valid; 156 boolean_t ic_rdma_extensions; 157 uint16_t ic_login_cid; 158 159 kmutex_t ic_mutex; 160 kcondvar_t ic_cv; 161 idm_status_t ic_conn_sm_status; 162 163 boolean_t ic_ffp; 164 uint32_t ic_internal_cid; 165 166 uint32_t ic_conn_flags; 167 idm_conn_type_t ic_conn_type; 168 idm_conn_ops_t ic_conn_ops; 169 idm_transport_ops_t *ic_transport_ops; 170 idm_transport_type_t ic_transport_type; 171 int ic_transport_hdrlen; 172 void *ic_transport_private; 173 idm_conn_param_t ic_conn_params; 174 /* 175 * Save client callback to interpose idm callback 176 */ 177 idm_pdu_cb_t *ic_client_callback; 178 clock_t ic_timestamp; 179 } idm_conn_t; 180 181 #define IDM_CONN_HEADER_DIGEST 0x00000001 182 #define IDM_CONN_DATA_DIGEST 0x00000002 183 #define IDM_CONN_USE_SCOREBOARD 0x00000004 184 185 #define IDM_CONN_ISINI(ICI_IC) ((ICI_IC)->ic_conn_type == CONN_TYPE_INI) 186 #define IDM_CONN_ISTGT(ICI_IC) ((ICI_IC)->ic_conn_type == CONN_TYPE_TGT) 187 188 /* 189 * An IDM target task can transfer data using multiple buffers. The task 190 * will maintain a list of buffers, and each buffer will contain the relative 191 * offset of the transfer and a pointer to the next buffer in the list. 192 * 193 * Note on client private data: 194 * idt_private is intended to be a pointer to some sort of client- 195 * specific state. 196 * 197 * idt_client_handle is a more generic client-private piece of data that can 198 * be used by the client for the express purpose of task lookup. The driving 199 * use case for this is for the client to store the initiator task tag for 200 * a given task so that it may be more easily retrieved for task management. 201 * 202 * The key take away here is that clients should never call 203 * idm_task_find_by_handle in the performance path. 204 * 205 * An initiator will require only one buffer per task, the offset will be 0. 206 */ 207 208 typedef struct idm_task_s { 209 idm_conn_t *idt_ic; /* Associated connection */ 210 /* connection type is in idt_ic->ic_conn_type */ 211 kmutex_t idt_mutex; 212 void *idt_private; /* Client private data */ 213 uintptr_t idt_client_handle; /* Client private */ 214 uint32_t idt_tt; /* Task tag */ 215 uint32_t idt_r2t_ttt; /* R2T Target Task tag */ 216 idm_task_state_t idt_state; 217 idm_refcnt_t idt_refcnt; 218 219 /* 220 * Statistics 221 */ 222 int idt_tx_to_ini_start; 223 int idt_tx_to_ini_done; 224 int idt_rx_from_ini_start; 225 int idt_rx_from_ini_done; 226 int idt_tx_bytes; /* IDM_CONN_USE_SCOREBOARD */ 227 int idt_rx_bytes; /* IDM_CONN_USE_SCOREBOARD */ 228 229 uint32_t idt_exp_datasn; /* expected datasn */ 230 uint32_t idt_exp_rttsn; /* expected rttsn */ 231 list_t idt_inbufv; /* chunks of IN buffers */ 232 list_t idt_outbufv; /* chunks of OUT buffers */ 233 234 /* 235 * Transport header, which describes this tasks remote tagged buffer 236 */ 237 int idt_transport_hdrlen; 238 void *idt_transport_hdr; 239 } idm_task_t; 240 241 int idm_task_constructor(void *task_void, void *arg, int flags); 242 void idm_task_destructor(void *task_void, void *arg); 243 244 #define IDM_TASKIDS_MAX 16384 245 #define IDM_BUF_MAGIC 0x49425546 /* "IBUF" */ 246 247 /* Protect with task mutex */ 248 typedef struct idm_buf_s { 249 uint32_t idb_magic; /* "IBUF" */ 250 251 /* 252 * Note: idm_tx_link *must* be the second element in the list for 253 * proper TX PDU ordering. 254 */ 255 list_node_t idm_tx_link; /* link in a list of TX objects */ 256 257 list_node_t idb_buflink; /* link in a multi-buffer data xfer */ 258 idm_conn_t *idb_ic; /* Associated connection */ 259 void *idb_buf; /* data */ 260 uint64_t idb_buflen; /* length of buffer */ 261 size_t idb_bufoffset; /* offset in a multi-buffer xfer */ 262 boolean_t idb_bufalloc; /* true if alloc'd in idm_buf_alloc */ 263 /* 264 * DataPDUInOrder=Yes, so to track that the PDUs in a sequence are sent 265 * in continuously increasing address order, check that offsets for a 266 * single buffer xfer are in order. 267 */ 268 uint32_t idb_exp_offset; 269 size_t idb_xfer_len; /* Current requested xfer len */ 270 void *idb_buf_private; /* transport-specific buf handle */ 271 void *idb_reg_private; /* transport-specific reg handle */ 272 void *idb_bufptr; /* transport-specific bcopy pointer */ 273 boolean_t idb_bufbcopy; /* true if bcopy required */ 274 275 idm_buf_cb_t *idb_buf_cb; /* Data Completion Notify, tgt only */ 276 void *idb_cb_arg; /* Client private data */ 277 idm_task_t *idb_task_binding; 278 timespec_t idb_xfer_start; 279 timespec_t idb_xfer_done; 280 boolean_t idb_in_transport; 281 boolean_t idb_tx_thread; /* Sockets only */ 282 iscsi_hdr_t idb_data_hdr_tmpl; /* Sockets only */ 283 idm_status_t idb_status; 284 } idm_buf_t; 285 286 typedef enum { 287 BP_CHECK_QUICK, 288 BP_CHECK_THOROUGH, 289 BP_CHECK_ASSERT 290 } idm_bufpat_check_type_t; 291 292 #define BUFPAT_MATCH(bc_bufpat, bc_idb) \ 293 ((bufpat->bufpat_idb == bc_idb) && \ 294 (bufpat->bufpat_bufmagic == IDM_BUF_MAGIC)) 295 296 typedef struct idm_bufpat_s { 297 void *bufpat_idb; 298 uint32_t bufpat_bufmagic; 299 uint32_t bufpat_offset; 300 } idm_bufpat_t; 301 302 #define PDU_MAX_IOVLEN 12 303 #define IDM_PDU_MAGIC 0x49504455 /* "IPDU" */ 304 305 typedef struct idm_pdu_s { 306 uint32_t isp_magic; /* "IPDU" */ 307 308 /* 309 * Internal - Order is vital. idm_tx_link *must* be the second 310 * element in this structure for proper TX PDU ordering. 311 */ 312 list_node_t idm_tx_link; 313 314 list_node_t isp_client_lnd; 315 316 idm_conn_t *isp_ic; /* Must be set */ 317 iscsi_hdr_t *isp_hdr; 318 uint_t isp_hdrlen; 319 uint8_t *isp_data; 320 uint_t isp_datalen; 321 322 /* Transport header */ 323 void *isp_transport_hdr; 324 uint32_t isp_transport_hdrlen; 325 void *isp_transport_private; 326 327 /* 328 * isp_data is used for sending SCSI status, NOP, text, scsi and 329 * non-scsi data. Data is received using isp_iov and isp_iovlen 330 * to support data over multiple buffers. 331 */ 332 void *isp_private; 333 idm_pdu_cb_t *isp_callback; 334 idm_status_t isp_status; 335 336 /* 337 * The following four elements are only used in 338 * idm_sorecv_scsidata() currently. 339 */ 340 struct iovec isp_iov[PDU_MAX_IOVLEN]; 341 int isp_iovlen; 342 idm_buf_t *isp_sorx_buf; 343 344 /* Implementation data for idm_pdu_alloc and sorx PDU cache */ 345 uint32_t isp_flags; 346 uint_t isp_hdrbuflen; 347 uint_t isp_databuflen; 348 } idm_pdu_t; 349 350 /* 351 * This "generic" object is used when removing an item from the ic_tx_list 352 * in order to determine whether it's an idm_pdu_t or an idm_buf_t 353 */ 354 355 typedef struct { 356 uint32_t idm_tx_obj_magic; 357 /* 358 * idm_tx_link *must* be the second element in this structure. 359 */ 360 list_node_t idm_tx_link; 361 } idm_tx_obj_t; 362 363 364 #define IDM_PDU_OPCODE(PDU) \ 365 ((PDU)->isp_hdr->opcode & ISCSI_OPCODE_MASK) 366 367 #define IDM_PDU_ALLOC 0x00000001 368 #define IDM_PDU_ADDL_HDR 0x00000002 369 #define IDM_PDU_ADDL_DATA 0x00000004 370 #define IDM_PDU_LOGIN_TX 0x00000008 371 372 #define OSD_EXT_CDB_AHSLEN (200 - 15) 373 #define BIDI_AHS_LENGTH 5 374 #define IDM_SORX_CACHE_AHSLEN \ 375 (((OSD_EXT_CDB_AHSLEN + 3) + \ 376 (BIDI_AHS_LENGTH + 3)) / sizeof (uint32_t)) 377 #define IDM_SORX_CACHE_HDRLEN (sizeof (iscsi_hdr_t) + IDM_SORX_CACHE_AHSLEN) 378 379 /* 380 * ID pool 381 */ 382 383 #define IDM_IDPOOL_MAGIC 0x4944504C /* IDPL */ 384 #define IDM_IDPOOL_MIN_SIZE 64 /* Number of IDs to begin with */ 385 #define IDM_IDPOOL_MAX_SIZE 64 * 1024 386 387 typedef struct idm_idpool { 388 uint32_t id_magic; 389 kmutex_t id_mutex; 390 uint8_t *id_pool; 391 uint32_t id_size; 392 uint8_t id_bit; 393 uint8_t id_bit_idx; 394 uint32_t id_idx; 395 uint32_t id_idx_msk; 396 uint32_t id_free_counter; 397 uint32_t id_max_free_counter; 398 } idm_idpool_t; 399 400 /* 401 * Global IDM state structure 402 */ 403 typedef struct { 404 kmutex_t idm_global_mutex; 405 taskq_t *idm_global_taskq; 406 kthread_t *idm_wd_thread; 407 kt_did_t idm_wd_thread_did; 408 boolean_t idm_wd_thread_running; 409 kcondvar_t idm_wd_cv; 410 list_t idm_tgt_svc_list; 411 kcondvar_t idm_tgt_svc_cv; 412 list_t idm_tgt_conn_list; 413 int idm_tgt_conn_count; 414 list_t idm_ini_conn_list; 415 kmem_cache_t *idm_buf_cache; 416 kmem_cache_t *idm_task_cache; 417 krwlock_t idm_taskid_table_lock; 418 idm_task_t **idm_taskid_table; 419 uint32_t idm_taskid_next; 420 uint32_t idm_taskid_max; 421 idm_idpool_t idm_conn_id_pool; 422 kmem_cache_t *idm_sotx_pdu_cache; 423 kmem_cache_t *idm_sorx_pdu_cache; 424 } idm_global_t; 425 426 idm_global_t idm; /* Global state */ 427 428 int 429 idm_idpool_create(idm_idpool_t *pool); 430 431 void 432 idm_idpool_destroy(idm_idpool_t *pool); 433 434 int 435 idm_idpool_alloc(idm_idpool_t *pool, uint16_t *id); 436 437 void 438 idm_idpool_free(idm_idpool_t *pool, uint16_t id); 439 440 void 441 idm_pdu_rx(idm_conn_t *ic, idm_pdu_t *pdu); 442 443 void 444 idm_pdu_tx_forward(idm_conn_t *ic, idm_pdu_t *pdu); 445 446 boolean_t 447 idm_pdu_rx_forward_ffp(idm_conn_t *ic, idm_pdu_t *pdu); 448 449 void 450 idm_pdu_rx_forward(idm_conn_t *ic, idm_pdu_t *pdu); 451 452 void 453 idm_pdu_tx_protocol_error(idm_conn_t *ic, idm_pdu_t *pdu); 454 455 void 456 idm_pdu_rx_protocol_error(idm_conn_t *ic, idm_pdu_t *pdu); 457 458 void idm_parse_login_rsp(idm_conn_t *ic, idm_pdu_t *logout_req_pdu, 459 boolean_t rx); 460 461 void idm_parse_logout_req(idm_conn_t *ic, idm_pdu_t *logout_req_pdu, 462 boolean_t rx); 463 464 void idm_parse_logout_rsp(idm_conn_t *ic, idm_pdu_t *login_rsp_pdu, 465 boolean_t rx); 466 467 idm_status_t idm_svc_conn_create(idm_svc_t *is, idm_transport_type_t type, 468 idm_conn_t **ic_result); 469 470 void idm_svc_conn_destroy(idm_conn_t *ic); 471 472 idm_status_t idm_ini_conn_finish(idm_conn_t *ic); 473 474 idm_status_t idm_tgt_conn_finish(idm_conn_t *ic); 475 476 idm_conn_t *idm_conn_create_common(idm_conn_type_t conn_type, 477 idm_transport_type_t tt, idm_conn_ops_t *conn_ops); 478 479 void idm_conn_destroy_common(idm_conn_t *ic); 480 481 void idm_conn_close(idm_conn_t *ic); 482 483 uint32_t idm_cid_alloc(void); 484 485 void idm_cid_free(uint32_t cid); 486 487 uint32_t idm_crc32c(void *address, unsigned long length); 488 489 uint32_t idm_crc32c_continued(void *address, unsigned long length, 490 uint32_t crc); 491 492 void idm_listbuf_insert(list_t *lst, idm_buf_t *buf); 493 494 int idm_task_compare(const void *v1, const void *v2); 495 496 idm_conn_t *idm_lookup_conn(uint8_t *isid, uint16_t tsih, uint16_t cid); 497 498 #ifdef __cplusplus 499 } 500 #endif 501 502 #endif /* _IDM_IMPL_H_ */ 503