iscsi_globals.h revision 1.23.4.1
1 /* $NetBSD: iscsi_globals.h,v 1.23.4.1 2019/06/10 22:07:12 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2004,2005,2006,2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wasabi Systems, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #ifndef _ISCSI_GLOBALS_H 32 #define _ISCSI_GLOBALS_H 33 34 /*#include "opt_ddb.h" */ 35 #define DDB 1 36 37 /* Includes we need in all files */ 38 39 #include <sys/param.h> 40 #include <sys/proc.h> 41 #include <sys/conf.h> 42 #include <sys/errno.h> 43 #include <sys/malloc.h> 44 #include <sys/scsiio.h> 45 #include <sys/kernel.h> 46 #include <sys/kthread.h> 47 #include <sys/systm.h> 48 #include <sys/device.h> 49 50 #include <dev/scsipi/scsi_all.h> 51 #include <dev/scsipi/scsi_message.h> 52 #include <dev/scsipi/scsipi_all.h> 53 #include <dev/scsipi/scsiconf.h> 54 #include <dev/scsipi/scsipiconf.h> 55 56 #include "iscsi.h" 57 #include "iscsi_pdu.h" 58 #include "iscsi_ioctl.h" 59 60 /* ------------------------ Code selection constants ------------------------ */ 61 62 #define ISCSI_DEBUG 0 63 64 /* ------------------------- Global Constants ----------------------------- */ 65 66 /* Version information */ 67 68 #define INTERFACE_VERSION 2 69 #define VERSION_MAJOR 3 70 #define VERSION_MINOR 1 71 #define VERSION_STRING "NetBSD iSCSI Software Initiator 20110407" 72 73 /* 74 NOTE: CCBS_PER_SESSION must not exceed 256 due to the way the ITT 75 is constructed (it has the CCB index in its lower 8 bits). If it should ever 76 be necessary to increase the number beyond that (which isn't expected), 77 the corresponding ITT generation and extraction code must be rewritten. 78 */ 79 #define CCBS_PER_SESSION 32 /* ToDo: Reasonable number?? */ 80 /* 81 NOTE: CCBS_FOR_SCSPI limits the number of outstanding commands for 82 SCSI commands, leaving some CCBs for keepalive and logout attempts, 83 which are needed for each connection. 84 */ 85 #define CCBS_FOR_SCSIPI 16 /* ToDo: Reasonable number?? */ 86 /* 87 NOTE: PDUS_PER_CONNECTION is a number that could potentially impact 88 performance if set too low, as a single command may use up a lot of PDUs for 89 high values of First/MaxBurstLength and small values of 90 MaxRecvDataSegmentLength of the target. 91 */ 92 #define PDUS_PER_CONNECTION 64 /* ToDo: Reasonable number?? */ 93 94 /* max outstanding serial nums before we give up on the connection */ 95 #define SERNUM_BUFFER_LENGTH (CCBS_PER_SESSION / 2) /* ToDo: Reasonable?? */ 96 97 /* The RecvDataSegmentLength for Target->Initiator */ 98 #define DEFAULT_MaxRecvDataSegmentLength (64*1024) 99 100 /* Command timeout (reset on received PDU associated with the command's CCB) */ 101 #define COMMAND_TIMEOUT (60 * hz) /* ToDo: Reasonable? (60 seconds) */ 102 #define MAX_CCB_TIMEOUTS 3 /* Max number of tries to resend or SNACK */ 103 #define MAX_CCB_TRIES 9 /* Max number of total tries to recover */ 104 105 /* Connectionn timeout (reset on every valid received PDU) */ 106 #define CONNECTION_TIMEOUT (2 * hz) /* ToDo: Reasonable? (2 seconds) */ 107 #define CONNECTION_IDLE_TIMEOUT (30 * hz) /* Adjusted to Time2Retain/2 later */ 108 #define MAX_CONN_TIMEOUTS 4 /* Max number of tries to ping a target */ 109 110 /* Maximum attempts to recover connection */ 111 #define MAX_RECOVERY_ATTEMPTS 2 /* If two attempts don't work, something */ 112 /* probably is seriously broken */ 113 114 /* PDU flags */ 115 116 #define PDUF_BUSY 0x01 /* PDU is being sent, don't re-send */ 117 #define PDUF_INQUEUE 0x02 /* PDU is in send queue */ 118 #define PDUF_PRIORITY 0x04 /* Insert PDU at head of queue */ 119 #define PDUF_NOUPDATE 0x10 /* Do not update PDU header/digest (test mode) */ 120 121 /* CCB Flags */ 122 123 #define CCBF_COMPLETE 0x0001 /* received status */ 124 #define CCBF_RESENT 0x0002 /* ccb was resent */ 125 #define CCBF_SENDTARGET 0x0004 /* SendTargets text request, not negotiation */ 126 #define CCBF_GOT_RSP 0x0010 /* Got at least one response to this request */ 127 #define CCBF_REASSIGN 0x0020 /* Command can be reassigned */ 128 #define CCBF_OTHERCONN 0x0040 /* a logout for a different connection */ 129 #define CCBF_WAITQUEUE 0x0080 /* CCB is on waiting queue */ 130 131 /* --------------------------- Global Types ------------------------------- */ 132 133 /* Connection state */ 134 135 typedef enum { 136 /* first three correspond to CSG/NSG coding */ 137 ST_SEC_NEG = 0, /* security negotiation phase */ 138 ST_OP_NEG = 1, /* operational negotiation phase */ 139 ST_FULL_FEATURE = 3, /* full feature phase */ 140 /* rest is internal */ 141 ST_WINDING_DOWN = 4, /* connection termination initiated, logging out */ 142 ST_LOGOUT_SENT = 5, /* logout has been sent */ 143 ST_SETTLING = 6, /* waiting for things to settle down */ 144 ST_IDLE = 7 /* connection is idle (ready to delete) */ 145 } conn_state_t; 146 147 148 /* Logout state */ 149 150 typedef enum { 151 NOT_LOGGED_OUT, /* Not logged out */ 152 LOGOUT_SENT, /* Logout was sent */ 153 LOGOUT_SUCCESS, /* Logout succeeded */ 154 LOGOUT_FAILED /* Logout failed */ 155 } logout_state_t; 156 157 158 /* CCB Disposition */ 159 160 typedef enum { 161 CCBDISP_UNUSED, /* 0 = In free pool */ 162 CCBDISP_BUSY, /* This CCB is busy, don't allow rx ops */ 163 CCBDISP_NOWAIT, /* Not waiting for anything */ 164 CCBDISP_FREE, /* Free this CCB when done */ 165 CCBDISP_WAIT, /* Calling thread is waiting for completion */ 166 CCBDISP_SCSIPI, /* Call scsipi_done when operation completes */ 167 CCBDISP_DEFER /* Defer waiting until all PDUs have been queued */ 168 } ccb_disp_t; 169 170 171 /* PDU Disposition */ 172 173 typedef enum { 174 PDUDISP_UNUSED, /* 0 = In free pool */ 175 PDUDISP_FREE, /* Free this PDU when done */ 176 PDUDISP_WAIT /* Waiting for acknowledge */ 177 } pdu_disp_t; 178 179 /* Timeout state */ 180 181 typedef enum { 182 TOUT_NONE, /* Initial */ 183 TOUT_ARMED, /* callout is scheduled */ 184 TOUT_QUEUED, /* put into timeout queue */ 185 TOUT_BUSY /* cleanup thread working */ 186 } tout_state_t; 187 188 typedef struct connection_s connection_t; 189 typedef struct session_s session_t; 190 typedef struct ccb_s ccb_t; 191 typedef struct pdu_s pdu_t; 192 193 /* the serial number management structure (a circular buffer) */ 194 195 typedef struct { 196 uint32_t ExpSN; /* ExpxxSN (Data or Stat) sent to the target */ 197 uint32_t next_sn; /* next_sn (== ExpSN if no ack is pending) */ 198 int top; /* top of buffer (newest element) */ 199 int bottom; /* bottom of buffer (oldest element) */ 200 uint32_t sernum[SERNUM_BUFFER_LENGTH]; /* the serial numbers */ 201 bool ack[SERNUM_BUFFER_LENGTH]; /* acknowledged? */ 202 } sernum_buffer_t; 203 204 205 /* 206 The per-PDU data structure. 207 */ 208 209 struct pdu_s { 210 TAILQ_ENTRY(pdu_s) pdu_chain; /* freelist or wait list (or no list) */ 211 TAILQ_ENTRY(pdu_s) pdu_send_chain; 212 /* chaining PDUs waiting to be sent */ 213 pdu_disp_t pdu_disp; /* what to do with this pdu */ 214 uint32_t pdu_flags; /* various processing flags */ 215 pdu_header_t pdu_hdr; /* Buffer for PDU associated with cmd */ 216 void *pdu_temp_data; /* (free after use) */ 217 uint32_t pdu_temp_data_len; /* size of temp data */ 218 219 struct uio pdu_uio; /* UIO structure */ 220 struct iovec pdu_io_vec[4]; 221 /* Header + data + data-digest + padding */ 222 223 struct uio pdu_save_uio; 224 /* UIO structure save for retransmits */ 225 struct iovec pdu_save_iovec[4]; 226 /* Header + data + data-digest + padding */ 227 uint32_t pdu_data_digest; 228 /* holds data digest if enabled */ 229 ccb_t *pdu_owner; 230 /* the ccb this PDU belongs to (if any) */ 231 connection_t *pdu_connection; 232 /* the connection this PDU belongs to */ 233 }; 234 235 236 /* the PDU list type */ 237 238 TAILQ_HEAD(pdu_list_s, pdu_s); 239 typedef struct pdu_list_s pdu_list_t; 240 241 /* 242 The per-command data structure. Calling it ccb in correspondence 243 to other HA drivers. 244 */ 245 246 struct ccb_s { 247 TAILQ_ENTRY(ccb_s) ccb_chain; 248 /* either freelist or waiting list (or no list) */ 249 250 uint32_t ccb_status; /* Status gets entered here */ 251 ccb_disp_t ccb_disp; /* what to do with this ccb */ 252 253 struct callout ccb_timeout; /* To make sure it isn't lost */ 254 TAILQ_ENTRY(ccb_s) ccb_tchain; 255 tout_state_t ccb_timedout; 256 int ccb_num_timeouts; 257 /* How often we've sent out SNACK without answer */ 258 int ccb_total_tries; 259 /* How often we've tried to recover */ 260 261 uint32_t ccb_ITT; 262 /* task tag: ITT counter + sess id + CCB index */ 263 sernum_buffer_t ccb_DataSN_buf; 264 /* Received Data Seq nums (read ops only) */ 265 266 void *ccb_par; 267 /* misc. parameter for this request */ 268 struct scsipi_xfer *ccb_xs; 269 /* the scsipi_xfer for this cmd */ 270 271 void *ccb_temp_data; 272 /* to hold state (mainly during negotiation) */ 273 void *ccb_text_data; 274 /* holds accumulated text for continued PDUs */ 275 uint32_t ccb_text_len; 276 /* length of text data so far */ 277 278 uint64_t ccb_lun; /* LUN */ 279 uint32_t ccb_tag; /* Command tag */ 280 uint8_t *ccb_cmd; /* SCSI command block */ 281 uint16_t ccb_cmdlen; /* SCSI command block length */ 282 bool ccb_data_in; /* if this is a read request */ 283 uint8_t *ccb_data_ptr; /* data pointer for read/write */ 284 uint32_t ccb_data_len; /* total data length */ 285 uint32_t ccb_xfer_len; /* data transferred on read */ 286 uint32_t ccb_residual; /* residual data size */ 287 288 void *ccb_sense_ptr; /* sense data pointer */ 289 int ccb_sense_len_req; /* requested sense data length */ 290 int ccb_sense_len_got; /* actual sense data length */ 291 292 pdu_t *ccb_pdu_waiting; /* PDU waiting to be ack'ed */ 293 volatile uint32_t ccb_CmdSN; /* CmdSN associated with waiting PDU */ 294 295 int ccb_flags; 296 connection_t *ccb_connection; /* connection for CCB */ 297 session_t *ccb_session; /* session for CCB */ 298 }; 299 300 301 /* the CCB list type */ 302 303 TAILQ_HEAD(ccb_list_s, ccb_s); 304 typedef struct ccb_list_s ccb_list_t; 305 306 307 /* 308 Per connection data: the connection structure 309 */ 310 struct connection_s { 311 TAILQ_ENTRY(connection_s) c_connections; 312 313 kmutex_t c_lock; 314 kcondvar_t c_conn_cv; 315 kcondvar_t c_pdu_cv; 316 kcondvar_t c_ccb_cv; 317 kcondvar_t c_idle_cv; 318 319 pdu_list_t c_pdu_pool; /* the free PDU pool */ 320 321 ccb_list_t c_ccbs_waiting; 322 /* CCBs waiting for completion */ 323 324 pdu_list_t c_pdus_to_send; 325 /* the PDUs waiting to be sent */ 326 327 sernum_buffer_t c_StatSN_buf; 328 /* to keep track of received StatSNs */ 329 330 uint32_t c_max_transfer; 331 /* min(MaxRecvDataSegmentLength, MaxBurstLength) */ 332 uint32_t c_max_firstimmed; 333 /* 0 if InitialR2T=Yes, else 334 min of (MaxRecvDataSegmentLength, FirstBurstLength) */ 335 uint32_t c_max_firstdata; 336 /* 0 if ImmediateData=No, else min of */ 337 /* (MaxRecvDataSegmentLength, FirstBurstLength) */ 338 339 uint32_t c_MaxRecvDataSegmentLength; 340 /* Target's value */ 341 uint32_t c_Our_MaxRecvDataSegmentLength; 342 /* Our own value */ 343 bool c_HeaderDigest; /* TRUE if doing CRC */ 344 bool c_DataDigest; /* TRUE if doing CRC */ 345 uint32_t c_Time2Wait; 346 /* Negotiated default or logout value */ 347 uint32_t c_Time2Retain; 348 /* Negotiated default or logout value */ 349 350 uint16_t c_id; 351 /* connection ID (unique within session) */ 352 353 conn_state_t c_state; /* State of connection */ 354 355 struct lwp *c_threadobj; 356 /* proc/thread pointer of socket owner */ 357 struct file *c_sock; /* the connection's socket */ 358 session_t *c_session; 359 /* back pointer to the owning session */ 360 361 struct lwp *c_rcvproc; /* receive thread */ 362 struct lwp *c_sendproc; /* send thread */ 363 364 uint32_t c_terminating; 365 /* if closing down: status */ 366 int c_recover; /* recovery count */ 367 /* (reset on first successful data transfer) */ 368 volatile unsigned c_usecount; /* number of active CCBs */ 369 volatile unsigned c_pducount; /* number of active PDUs */ 370 371 bool c_destroy; /* conn will be destroyed */ 372 bool c_in_session; 373 /* if it's linked into the session list */ 374 logout_state_t c_loggedout; 375 /* status of logout (for recovery) */ 376 struct callout c_timeout; 377 /* Timeout for checking if connection is dead */ 378 TAILQ_ENTRY(connection_s) c_tchain; 379 tout_state_t c_timedout; 380 int c_num_timeouts; 381 /* How often we've sent out a NOP without answer */ 382 uint32_t c_idle_timeout_val; 383 /* Connection timeout value when idle */ 384 385 iscsi_login_parameters_t *c_login_par; 386 /* only valid during login */ 387 388 pdu_t c_pdu[PDUS_PER_CONNECTION]; /* PDUs */ 389 }; 390 391 /* the connection list type */ 392 393 TAILQ_HEAD(connection_list_s, connection_s); 394 typedef struct connection_list_s connection_list_t; 395 396 397 /* 398 Per session data: the session structure 399 */ 400 401 struct session_s { 402 /* Interface to child drivers. 403 NOTE: sc_adapter MUST be the first field in this structure so we can 404 easily get from adapter to session. 405 */ 406 struct scsipi_adapter s_sc_adapter; 407 struct scsipi_channel s_sc_channel; 408 409 device_t s_child_dev; 410 /* the child we're associated with - (NULL if not mapped) */ 411 412 int s_refcount; /* session in use by scsipi */ 413 414 /* local stuff */ 415 TAILQ_ENTRY(session_s) s_sessions; /* the list of sessions */ 416 417 kmutex_t s_lock; 418 kcondvar_t s_sess_cv; 419 kcondvar_t s_ccb_cv; 420 421 ccb_list_t s_ccb_pool; /* The free CCB pool */ 422 423 int s_send_window; 424 425 uint16_t s_id; /* session ID (unique within driver) */ 426 uint16_t s_TSIH; /* Target assigned session ID */ 427 428 uint32_t s_CmdSN; /* Current CmdSN */ 429 uint32_t s_ExpCmdSN; /* Current max ExpCmdSN received */ 430 uint32_t s_MaxCmdSN; /* Current MaxCmdSN */ 431 432 /* negotiated values */ 433 uint32_t s_ErrorRecoveryLevel; 434 uint32_t s_FirstBurstLength; 435 uint32_t s_MaxBurstLength; 436 bool s_ImmediateData; 437 bool s_InitialR2T; 438 uint32_t s_MaxOutstandingR2T; 439 uint32_t s_MaxConnections; 440 uint32_t s_DefaultTime2Wait; 441 uint32_t s_DefaultTime2Retain; 442 443 iscsi_login_session_type_t s_login_type; /* session type */ 444 445 /* for send_targets requests */ 446 uint8_t *s_target_list; 447 uint32_t s_target_list_len; 448 449 uint32_t s_conn_id; /* connection ID counter */ 450 451 uint32_t s_terminating; /* if closing down: status */ 452 453 uint32_t s_active_connections; 454 /* currently active connections */ 455 uint32_t s_total_connections; 456 /* connections associated with this session (active or winding down) */ 457 connection_list_t s_conn_list; /* the list of connections */ 458 connection_t *s_mru_connection; 459 /* the most recently used connection */ 460 461 ccb_t s_ccb[CCBS_PER_SESSION]; /* CCBs */ 462 463 char s_tgtname[ISCSI_STRING_LENGTH + 1]; 464 /* iSCSI target name */ 465 }; 466 467 /* the session list type */ 468 469 TAILQ_HEAD(session_list_s, session_s); 470 typedef struct session_list_s session_list_t; 471 472 473 /* 474 Event notification structures 475 */ 476 477 typedef struct event_s { 478 TAILQ_ENTRY(event_s) ev_link; /* next event in queue */ 479 iscsi_event_t ev_event_kind; /* which event */ 480 uint32_t ev_session_id; /* affected session ID */ 481 uint32_t ev_connection_id;/* affected connection ID */ 482 uint32_t ev_reason; /* event reason */ 483 } event_t; 484 485 /* the event list entry type */ 486 487 TAILQ_HEAD(event_list_s, event_s); 488 typedef struct event_list_s event_list_t; 489 490 491 typedef struct event_handler_s { 492 TAILQ_ENTRY(event_handler_s) evh_link; /* next handler */ 493 uint32_t evh_id; /* unique ID */ 494 event_list_t evh_events; /* list of events pending */ 495 iscsi_wait_event_parameters_t *evh_waiter; /* waiting parameter */ 496 /* following to detect dead handlers */ 497 event_t *evh_first_in_list; 498 } event_handler_t; 499 500 /* the event list entry type */ 501 502 TAILQ_HEAD(event_handler_list_s, event_handler_s); 503 typedef struct event_handler_list_s event_handler_list_t; 504 505 /* /dev/iscsi0 state */ 506 struct iscsifd { 507 TAILQ_ENTRY(iscsifd) fd_link; 508 device_t fd_dev; 509 int fd_unit; 510 }; 511 512 /* ------------------------- Global Variables ----------------------------- */ 513 514 /* In iscsi_main.c */ 515 516 extern struct cfattach iscsi_ca; /* the device attach structure */ 517 518 extern session_list_t iscsi_sessions; /* the list of sessions */ 519 extern bool iscsi_detaching; /* signal to cleanup thread it should exit */ 520 extern uint32_t iscsi_num_send_threads; /* the number of active send threads */ 521 522 extern uint8_t iscsi_InitiatorName[ISCSI_STRING_LENGTH]; 523 extern uint8_t iscsi_InitiatorAlias[ISCSI_STRING_LENGTH]; 524 extern login_isid_t iscsi_InitiatorISID; 525 526 /* Debugging stuff */ 527 528 #ifndef DDB 529 #define Debugger() panic("should call debugger here (iscsi.c)") 530 #endif /* ! DDB */ 531 532 #ifdef ISCSI_DEBUG 533 534 extern int iscsi_debug_level; /* How much debug info to display */ 535 extern bool iscsi_hex_bignums; /* Whether to encode parameters in hex or base64 */ 536 537 #define DEBOUT(x) printf x 538 #define DEB(lev,x) { if (iscsi_debug_level >= lev) printf x ;} 539 #define DEBC(conn,lev,x) { if (iscsi_debug_level >= lev) { printf("S%dC%d: ", \ 540 conn ? conn->c_session->s_id : -1, \ 541 conn ? conn->c_id : -1); printf x ;}} 542 543 #define STATIC static 544 545 #else 546 547 #define DEBOUT(x) 548 #define DEB(lev,x) 549 #define DEBC(conn,lev,x) 550 551 #define STATIC static 552 553 #endif 554 555 /* Critical section macros */ 556 557 /* misc stuff */ 558 #define min(a, b) ((a) < (b)) ? (a) : (b) 559 #define max(a, b) ((a) < (b)) ? (b) : (a) 560 561 562 /* 563 Convert unsigned int to 3-byte value (for DataSegmentLength field in PDU) 564 */ 565 566 static __inline void 567 hton3(uint32_t val, uint8_t *bytes) 568 { 569 bytes[0] = (uint8_t) (val >> 16); 570 bytes[1] = (uint8_t) (val >> 8); 571 bytes[2] = (uint8_t) val; 572 } 573 574 /* 575 Convert 3-byte value to unsigned int (for DataSegmentLength field in PDU) 576 */ 577 578 static __inline uint32_t 579 ntoh3(uint8_t *bytes) 580 { 581 return (bytes[0] << 16) | (bytes[1] << 8) | bytes[2]; 582 } 583 584 585 /* 586 * Convert uint64 to network byte order (for LUN field in PDU) 587 */ 588 static __inline uint64_t 589 htonq(uint64_t x) 590 { 591 #if BYTE_ORDER == LITTLE_ENDIAN 592 uint8_t *s = (uint8_t *) & x; 593 return (uint64_t) ((uint64_t) s[0] << 56 | (uint64_t) s[1] << 48 | 594 (uint64_t) s[2] << 40 | (uint64_t) s[3] << 32 | 595 (uint64_t) s[4] << 24 | (uint64_t) s[5] << 16 | 596 (uint64_t) s[6] << 8 | (uint64_t) s[7]); 597 #else 598 return x; 599 #endif 600 } 601 602 #define ntohq(x) htonq(x) 603 604 /* 605 * Serial number buffer empty? 606 */ 607 608 static __inline bool 609 sn_empty(sernum_buffer_t *buf) 610 { 611 return buf->top == buf->bottom; 612 } 613 614 615 /* 616 * Serial number compare 617 */ 618 619 static __inline bool 620 sn_a_lt_b(uint32_t a, uint32_t b) 621 { 622 return (a < b && !((b - a) & 0x80000000)) || 623 (a > b && ((a - b) & 0x80000000)); 624 } 625 626 static __inline bool 627 sn_a_le_b(uint32_t a, uint32_t b) 628 { 629 return (a <= b && !((b - a) & 0x80000000)) || 630 (a >= b && ((a - b) & 0x80000000)); 631 } 632 633 /* in iscsi_ioctl.c */ 634 635 void iscsi_init_cleanup(void); 636 int iscsi_destroy_cleanup(void); 637 void iscsi_notify_cleanup(void); 638 639 640 /* Parameter for logout is reason code in logout PDU, -1 for don't send logout */ 641 #define NO_LOGOUT -1 642 #define LOGOUT_SESSION 0 643 #define LOGOUT_CONNECTION 1 644 #define RECOVER_CONNECTION 2 645 646 void add_event(iscsi_event_t, uint32_t, uint32_t, uint32_t); 647 648 void kill_connection(connection_t *, uint32_t, int, bool); 649 void kill_session(session_t *, uint32_t, int, bool); 650 int kill_all_sessions(void); 651 void handle_connection_error(connection_t *, uint32_t, int); 652 void add_connection_cleanup(connection_t *); 653 654 #ifndef ISCSI_MINIMAL 655 uint32_t map_databuf(struct proc *, void **, uint32_t); 656 void unmap_databuf(struct proc *, void *, uint32_t); 657 #endif 658 int iscsiioctl(struct file *, u_long, void *); 659 660 session_t *find_session(uint32_t); 661 connection_t *find_connection(session_t *, uint32_t); 662 int ref_session(session_t *); 663 void unref_session(session_t *); 664 665 /* in iscsi_main.c */ 666 667 /*void iscsiattach(void *); */ 668 int iscsidetach(device_t, int); 669 670 void iscsi_done(ccb_t *); 671 int map_session(session_t *, device_t); 672 int unmap_session(session_t *); 673 674 /* in iscsi_send.c */ 675 676 void iscsi_send_thread(void *); 677 678 connection_t *assign_connection(session_t *session, bool waitok); 679 void resend_pdu(ccb_t *); 680 int send_login(connection_t *); 681 int send_logout(connection_t *, connection_t *, int, bool); 682 int send_data_out(connection_t *, pdu_t *, ccb_t *, ccb_disp_t, bool); 683 void send_run_xfer(session_t *, struct scsipi_xfer *); 684 int send_send_targets(session_t *, uint8_t *); 685 int send_task_management(connection_t *, ccb_t *, struct scsipi_xfer *, int); 686 687 void negotiate_login(connection_t *, pdu_t *, ccb_t *); 688 void acknowledge_text(connection_t *, pdu_t *, ccb_t *); 689 void start_text_negotiation(connection_t *); 690 void negotiate_text(connection_t *, pdu_t *, ccb_t *); 691 int send_nop_out(connection_t *, pdu_t *); 692 void snack_missing(connection_t *, ccb_t *, uint8_t, uint32_t, uint32_t); 693 void send_snack(connection_t *, pdu_t *, ccb_t *, uint8_t); 694 int send_send_targets(session_t *, uint8_t *); 695 696 void send_command(ccb_t *, ccb_disp_t, bool, bool); 697 #ifndef ISCSI_MINIMAL 698 int send_io_command(session_t *, uint64_t, scsireq_t *, bool, uint32_t); 699 #endif 700 701 void connection_timeout_co(void *); 702 void ccb_timeout_co(void *); 703 704 void connection_timeout(connection_t *); 705 void connection_timeout_start(connection_t *, int); 706 void connection_timeout_stop(connection_t *); 707 void ccb_timeout(ccb_t *); 708 void ccb_timeout_start(ccb_t *, int); 709 void ccb_timeout_stop(ccb_t *); 710 711 /* in iscsi_rcv.c */ 712 713 void iscsi_rcv_thread(void *); 714 715 /* in iscsi_utils.c */ 716 717 uint32_t gen_digest(const void *, size_t); 718 uint32_t gen_digest_2(const void *, size_t, const void *, size_t); 719 720 void create_ccbs(session_t *); 721 void destroy_ccbs(session_t *); 722 ccb_t *get_ccb(connection_t *, bool); 723 void free_ccb(ccb_t *); 724 void suspend_ccb(ccb_t *, bool); 725 void wake_ccb(ccb_t *, uint32_t); 726 727 void create_pdus(connection_t *); 728 pdu_t *get_pdu(connection_t *, bool); 729 void free_pdu(pdu_t *); 730 731 void init_sernum(sernum_buffer_t *); 732 int add_sernum(sernum_buffer_t *, uint32_t); 733 uint32_t ack_sernum(sernum_buffer_t *, uint32_t); 734 735 uint32_t get_sernum(session_t *, pdu_t *); 736 int sernum_in_window(session_t *); 737 int window_size(session_t *, int); 738 739 /* in iscsi_text.c */ 740 741 int assemble_login_parameters(connection_t *, ccb_t *, pdu_t *); 742 int assemble_security_parameters(connection_t *, ccb_t *, pdu_t *, pdu_t *); 743 int assemble_negotiation_parameters(connection_t *, ccb_t *, pdu_t *, pdu_t *); 744 int init_text_parameters(connection_t *, ccb_t *); 745 int assemble_send_targets(pdu_t *, uint8_t *); 746 void set_negotiated_parameters(ccb_t *); 747 748 #endif /* !_ISCSI_GLOBALS_H */ 749
Indexes created Mon Oct 20 00:09:40 GMT 2025