iscsi_globals.h revision 1.17
1 /* $NetBSD: iscsi_globals.h,v 1.17 2016/06/05 04:48:17 mlelstv 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/scsipi_all.h> 52 #include <dev/scsipi/scsiconf.h> 53 #include <dev/scsipi/scsipiconf.h> 54 55 #include "iscsi.h" 56 #include "iscsi_pdu.h" 57 #include "iscsi_ioctl.h" 58 59 /* ------------------------ Code selection constants ------------------------ */ 60 61 #define ISCSI_DEBUG 0 62 63 /* ------------------------- Global Constants ----------------------------- */ 64 65 /* Version information */ 66 67 #define INTERFACE_VERSION 2 68 #define VERSION_MAJOR 3 69 #define VERSION_MINOR 1 70 #define VERSION_STRING "NetBSD iSCSI Software Initiator 20110407" 71 72 /* 73 Various checks are made that the expected cmd Serial Number is less than 74 the actual command serial number. The extremely paranoid amongst us 75 believe that a malicious iSCSI server could set this artificially low 76 and effectively DoS a naive initiator. For this (possibly ludicrous) 77 reason, I have added the two definitions below (agc, 2011/04/09). The 78 throttling definition enables a check that the CmdSN is less than the 79 ExpCmdSN in iscsi_send.c, and is enabled by default. The second definition 80 effectively says "don't bother testing these values", and is used right 81 now only in iscsi_send.c. 82 */ 83 #define ISCSI_THROTTLING_ENABLED 1 84 #define ISCSI_SERVER_TRUSTED 1 85 86 /* 87 NOTE: CCBS_PER_SESSION must not exceed 256 due to the way the ITT 88 is constructed (it has the CCB index in its lower 8 bits). If it should ever 89 be necessary to increase the number beyond that (which isn't expected), 90 the corresponding ITT generation and extraction code must be rewritten. 91 */ 92 #define CCBS_PER_SESSION 64 /* ToDo: Reasonable number?? */ 93 /* 94 NOTE: PDUS_PER_CONNECTION is a number that could potentially impact 95 performance if set too low, as a single command may use up a lot of PDUs for 96 high values of First/MaxBurstLength and small values of 97 MaxRecvDataSegmentLength of the target. 98 */ 99 #define PDUS_PER_CONNECTION 128 /* ToDo: Reasonable number?? */ 100 101 /* max outstanding serial nums before we give up on the connection */ 102 #define SERNUM_BUFFER_LENGTH (CCBS_PER_SESSION / 2) /* ToDo: Reasonable?? */ 103 104 /* The RecvDataSegmentLength for Target->Initiator */ 105 #define DEFAULT_MaxRecvDataSegmentLength (64*1024) 106 107 /* Command timeout (reset on received PDU associated with the command's CCB) */ 108 #define COMMAND_TIMEOUT (7 * hz) /* ToDo: Reasonable? (7 seconds) */ 109 #define MAX_CCB_TIMEOUTS 3 /* Max number of tries to resend or SNACK */ 110 #define MAX_CCB_TRIES 9 /* Max number of total tries to recover */ 111 112 /* Connectionn timeout (reset on every valid received PDU) */ 113 #define CONNECTION_TIMEOUT (2 * hz) /* ToDo: Reasonable? (2 seconds) */ 114 #define CONNECTION_IDLE_TIMEOUT (30 * hz) /* Adjusted to Time2Retain/2 later */ 115 #define MAX_CONN_TIMEOUTS 4 /* Max number of tries to ping a target */ 116 117 /* Maximum attempts to recover connection */ 118 #define MAX_RECOVERY_ATTEMPTS 2 /* If two attempts don't work, something */ 119 /* probably is seriously broken */ 120 121 /* PDU flags */ 122 123 #define PDUF_BUSY 0x01 /* PDU is being sent, don't re-send */ 124 #define PDUF_INQUEUE 0x02 /* PDU is in send queue */ 125 #define PDUF_PRIORITY 0x04 /* Insert PDU at head of queue */ 126 #define PDUF_NOUPDATE 0x10 /* Do not update PDU header/digest (test mode) */ 127 128 /* CCB Flags */ 129 130 #define CCBF_COMPLETE 0x0001 /* received status */ 131 #define CCBF_RESENT 0x0002 /* ccb was resent */ 132 #define CCBF_SENDTARGET 0x0004 /* SendTargets text request, not negotiation */ 133 #define CCBF_WAITING 0x0008 /* CCB is waiting for MaxCmdSN, wake it up */ 134 #define CCBF_GOT_RSP 0x0010 /* Got at least one response to this request */ 135 #define CCBF_REASSIGN 0x0020 /* Command can be reassigned */ 136 #define CCBF_OTHERCONN 0x0040 /* a logout for a different connection */ 137 #define CCBF_WAITQUEUE 0x0080 /* CCB is on waiting queue */ 138 #define CCBF_THROTTLING 0x0100 /* CCB is on throttling queue */ 139 140 /* --------------------------- Global Types ------------------------------- */ 141 142 /* Connection state */ 143 144 typedef enum { 145 /* first three correspond to CSG/NSG coding */ 146 ST_SEC_NEG = 0, /* security negotiation phase */ 147 ST_OP_NEG = 1, /* operational negotiation phase */ 148 ST_FULL_FEATURE = 3, /* full feature phase */ 149 /* rest is internal */ 150 ST_WINDING_DOWN = 4, /* connection termination initiated, logging out */ 151 ST_LOGOUT_SENT = 5, /* logout has been sent */ 152 ST_SETTLING = 6, /* waiting for things to settle down */ 153 ST_IDLE = 7 /* connection is idle (ready to delete) */ 154 } conn_state_t; 155 156 157 /* Logout state */ 158 159 typedef enum { 160 NOT_LOGGED_OUT, /* Not logged out */ 161 LOGOUT_SENT, /* Logout was sent */ 162 LOGOUT_SUCCESS, /* Logout succeeded */ 163 LOGOUT_FAILED /* Logout failed */ 164 } logout_state_t; 165 166 167 /* CCB Disposition */ 168 169 typedef enum { 170 CCBDISP_UNUSED, /* 0 = In free pool */ 171 CCBDISP_BUSY, /* This CCB is busy, don't allow rx ops */ 172 CCBDISP_NOWAIT, /* Not waiting for anything */ 173 CCBDISP_FREE, /* Free this CCB when done */ 174 CCBDISP_WAIT, /* Calling thread is waiting for completion */ 175 CCBDISP_SCSIPI, /* Call scsipi_done when operation completes */ 176 CCBDISP_DEFER /* Defer waiting until all PDUs have been queued */ 177 } ccb_disp_t; 178 179 180 /* PDU Disposition */ 181 182 typedef enum { 183 PDUDISP_UNUSED, /* 0 = In free pool */ 184 PDUDISP_FREE, /* Free this PDU when done */ 185 PDUDISP_WAIT /* Waiting for acknowledge */ 186 } pdu_disp_t; 187 188 /* Timeout state */ 189 190 typedef enum { 191 TOUT_NONE, /* Initial */ 192 TOUT_ARMED, /* callout is scheduled */ 193 TOUT_QUEUED, /* put into timeout queue */ 194 TOUT_BUSY /* cleanup thread working */ 195 } tout_state_t; 196 197 typedef struct connection_s connection_t; 198 typedef struct session_s session_t; 199 typedef struct ccb_s ccb_t; 200 typedef struct pdu_s pdu_t; 201 202 /* the serial number management structure (a circular buffer) */ 203 204 typedef struct { 205 uint32_t ExpSN; /* ExpxxSN (Data or Stat) sent to the target */ 206 uint32_t next_sn; /* next_sn (== ExpSN if no ack is pending) */ 207 int top; /* top of buffer (newest element) */ 208 int bottom; /* bottom of buffer (oldest element) */ 209 uint32_t sernum[SERNUM_BUFFER_LENGTH]; /* the serial numbers */ 210 bool ack[SERNUM_BUFFER_LENGTH]; /* acknowledged? */ 211 } sernum_buffer_t; 212 213 214 /* 215 The per-PDU data structure. 216 */ 217 218 struct pdu_s { 219 TAILQ_ENTRY(pdu_s) chain; /* freelist or wait list (or no list) */ 220 TAILQ_ENTRY(pdu_s) send_chain; 221 /* chaining PDUs waiting to be sent */ 222 pdu_disp_t disp; /* what to do with this pdu */ 223 uint32_t flags; /* various processing flags */ 224 pdu_header_t pdu; /* Buffer for PDU associated with cmd */ 225 void *temp_data; /* (free after use) */ 226 uint32_t temp_data_len; /* size of temp data */ 227 228 struct uio uio; /* UIO structure */ 229 struct iovec io_vec[4]; 230 /* Header + data + data-digest + padding */ 231 232 struct uio save_uio; 233 /* UIO structure save for retransmits */ 234 struct iovec save_iovec[4]; 235 /* Header + data + data-digest + padding */ 236 uint32_t data_digest; 237 /* holds data digest if enabled */ 238 ccb_t *owner; 239 /* the ccb this PDU belongs to (if any) */ 240 connection_t *connection; 241 /* the connection this PDU belongs to */ 242 }; 243 244 245 /* the PDU list type */ 246 247 TAILQ_HEAD(pdu_list_s, pdu_s); 248 typedef struct pdu_list_s pdu_list_t; 249 250 /* 251 The per-command data structure. Calling it ccb in correspondence 252 to other HA drivers. 253 */ 254 255 struct ccb_s { 256 TAILQ_ENTRY(ccb_s) chain; 257 /* either freelist or waiting list (or no list) */ 258 259 uint32_t status; /* Status gets entered here */ 260 ccb_disp_t disp; /* what to do with this ccb */ 261 262 struct callout timeout; /* To make sure it isn't lost */ 263 TAILQ_ENTRY(ccb_s) tchain; 264 tout_state_t timedout; 265 int num_timeouts; 266 /* How often we've sent out SNACK without answer */ 267 int total_tries; 268 /* How often we've tried to recover */ 269 270 uint32_t ITT; 271 /* task tag: ITT counter + sess id + CCB index */ 272 sernum_buffer_t DataSN_buf; 273 /* Received Data Seq nums (read ops only) */ 274 275 void *par; 276 /* misc. parameter for this request */ 277 struct scsipi_xfer *xs; 278 /* the scsipi_xfer for this cmd */ 279 280 void *temp_data; 281 /* to hold state (mainly during negotiation) */ 282 void *text_data; 283 /* holds accumulated text for continued PDUs */ 284 uint32_t text_len; 285 /* length of text data so far */ 286 287 uint64_t lun; /* LUN */ 288 uint8_t *cmd; /* SCSI command block */ 289 uint16_t cmdlen; /* SCSI command block length */ 290 bool data_in; /* if this is a read request */ 291 uint8_t *data_ptr; /* data pointer for read/write */ 292 uint32_t data_len; /* total data length */ 293 uint32_t xfer_len; /* data transferred on read */ 294 uint32_t residual; /* residual data size */ 295 296 void *sense_ptr; /* sense data pointer */ 297 int sense_len_req; /* requested sense data length */ 298 int sense_len_got; /* actual sense data length */ 299 300 pdu_t *pdu_waiting; /* PDU waiting to be ack'ed */ 301 volatile uint32_t CmdSN; /* CmdSN associated with waiting PDU */ 302 303 int flags; 304 connection_t *connection; /* connection for CCB */ 305 session_t *session; /* session for CCB */ 306 }; 307 308 309 /* the CCB list type */ 310 311 TAILQ_HEAD(ccb_list_s, ccb_s); 312 typedef struct ccb_list_s ccb_list_t; 313 314 315 /* 316 Per connection data: the connection structure 317 */ 318 struct connection_s { 319 TAILQ_ENTRY(connection_s) connections; 320 321 kmutex_t lock; 322 kcondvar_t conn_cv; 323 kcondvar_t ccb_cv; 324 kcondvar_t idle_cv; 325 326 pdu_list_t pdu_pool; /* the free PDU pool */ 327 328 ccb_list_t ccbs_waiting; 329 /* CCBs waiting for completion */ 330 331 pdu_list_t pdus_to_send; 332 /* the PDUs waiting to be sent */ 333 334 sernum_buffer_t StatSN_buf; 335 /* to keep track of received StatSNs */ 336 337 uint32_t max_transfer; 338 /* min(MaxRecvDataSegmentLength, MaxBurstLength) */ 339 uint32_t max_firstimmed; 340 /* 0 if InitialR2T=Yes, else 341 min of (MaxRecvDataSegmentLength, FirstBurstLength) */ 342 uint32_t max_firstdata; 343 /* 0 if ImmediateData=No, else min of */ 344 /* (MaxRecvDataSegmentLength, FirstBurstLength) */ 345 346 uint32_t MaxRecvDataSegmentLength; 347 /* Target's value */ 348 uint32_t Our_MaxRecvDataSegmentLength; 349 /* Our own value */ 350 bool HeaderDigest; /* TRUE if doing CRC */ 351 bool DataDigest; /* TRUE if doing CRC */ 352 uint32_t Time2Wait; 353 /* Negotiated default or logout value */ 354 uint32_t Time2Retain; 355 /* Negotiated default or logout value */ 356 357 uint16_t id; 358 /* connection ID (unique within session) */ 359 360 conn_state_t state; /* State of connection */ 361 362 struct lwp *threadobj; 363 /* proc/thread pointer of socket owner */ 364 struct file *sock; /* the connection's socket */ 365 session_t *session; 366 /* back pointer to the owning session */ 367 368 struct lwp *rcvproc; /* receive thread */ 369 struct lwp *sendproc; /* send thread */ 370 371 uint32_t terminating; 372 /* if closing down: status */ 373 int recover; /* recovery count */ 374 /* (reset on first successful data transfer) */ 375 volatile unsigned usecount; /* number of active CCBs */ 376 377 bool destroy; /* conn will be destroyed */ 378 bool in_session; 379 /* if it's linked into the session list */ 380 logout_state_t loggedout; 381 /* status of logout (for recovery) */ 382 struct callout timeout; 383 /* Timeout for checking if connection is dead */ 384 TAILQ_ENTRY(connection_s) tchain; 385 tout_state_t timedout; 386 int num_timeouts; 387 /* How often we've sent out a NOP without answer */ 388 uint32_t idle_timeout_val; 389 /* Connection timeout value when idle */ 390 391 iscsi_login_parameters_t *login_par; 392 /* only valid during login */ 393 394 pdu_t pdu[PDUS_PER_CONNECTION]; /* PDUs */ 395 }; 396 397 /* the connection list type */ 398 399 TAILQ_HEAD(connection_list_s, connection_s); 400 typedef struct connection_list_s connection_list_t; 401 402 403 /* 404 Per session data: the session structure 405 */ 406 407 struct session_s { 408 /* Interface to child drivers. 409 NOTE: sc_adapter MUST be the first field in this structure so we can 410 easily get from adapter to session. 411 */ 412 struct scsipi_adapter sc_adapter; 413 struct scsipi_channel sc_channel; 414 415 device_t child_dev; 416 /* the child we're associated with - (NULL if not mapped) */ 417 418 /* local stuff */ 419 TAILQ_ENTRY(session_s) sessions; /* the list of sessions */ 420 421 kmutex_t lock; 422 kcondvar_t sess_cv; 423 kcondvar_t ccb_cv; 424 425 ccb_list_t ccb_pool; /* The free CCB pool */ 426 ccb_list_t ccbs_throttled; 427 /* CCBs waiting for MaxCmdSN to increase */ 428 429 uint16_t id; /* session ID (unique within driver) */ 430 uint16_t TSIH; /* Target assigned session ID */ 431 432 uint32_t CmdSN; /* Current CmdSN */ 433 uint32_t ExpCmdSN; /* Current max ExpCmdSN received */ 434 uint32_t MaxCmdSN; /* Current MaxCmdSN */ 435 436 /* negotiated values */ 437 uint32_t ErrorRecoveryLevel; 438 uint32_t FirstBurstLength; 439 uint32_t MaxBurstLength; 440 bool ImmediateData; 441 bool InitialR2T; 442 uint32_t MaxOutstandingR2T; 443 uint32_t MaxConnections; 444 uint32_t DefaultTime2Wait; 445 uint32_t DefaultTime2Retain; 446 447 iscsi_login_session_type_t login_type; /* session type */ 448 449 /* for send_targets requests */ 450 uint8_t *target_list; 451 uint32_t target_list_len; 452 453 uint32_t conn_id; /* connection ID counter */ 454 455 uint32_t terminating; /* if closing down: status */ 456 457 uint32_t active_connections; 458 /* currently active connections */ 459 uint32_t total_connections; 460 /* connections associated with this session (active or winding down) */ 461 connection_list_t conn_list; /* the list of connections */ 462 connection_t *mru_connection; 463 /* the most recently used connection */ 464 465 uint8_t itt_id; /* counter for use in ITT */ 466 467 ccb_t ccb[CCBS_PER_SESSION]; /* CCBs */ 468 469 char tgtname[ISCSI_STRING_LENGTH + 1]; 470 /* iSCSI target name */ 471 }; 472 473 /* the session list type */ 474 475 TAILQ_HEAD(session_list_s, session_s); 476 typedef struct session_list_s session_list_t; 477 478 479 /* 480 Event notification structures 481 */ 482 483 typedef struct event_s { 484 TAILQ_ENTRY(event_s) link; /* next event in queue */ 485 iscsi_event_t event_kind; /* which event */ 486 uint32_t session_id; /* affected session ID */ 487 uint32_t connection_id; /* affected connection ID */ 488 uint32_t reason; /* event reason */ 489 } event_t; 490 491 /* the event list entry type */ 492 493 TAILQ_HEAD(event_list_s, event_s); 494 typedef struct event_list_s event_list_t; 495 496 497 typedef struct event_handler_s { 498 TAILQ_ENTRY(event_handler_s) link; /* next handler */ 499 uint32_t id; /* unique ID */ 500 event_list_t events; /* list of events pending */ 501 iscsi_wait_event_parameters_t *waiter; /* waiting parameter */ 502 /* following to detect dead handlers */ 503 event_t *first_in_list; 504 } event_handler_t; 505 506 /* the event list entry type */ 507 508 TAILQ_HEAD(event_handler_list_s, event_handler_s); 509 typedef struct event_handler_list_s event_handler_list_t; 510 511 /* /dev/iscsi0 state */ 512 struct iscsifd { 513 TAILQ_ENTRY(iscsifd) link; 514 device_t dev; 515 int unit; 516 }; 517 518 /* ------------------------- Global Variables ----------------------------- */ 519 520 /* In iscsi_main.c */ 521 522 extern struct cfattach iscsi_ca; /* the device attach structure */ 523 524 extern session_list_t iscsi_sessions; /* the list of sessions */ 525 extern bool iscsi_detaching; /* signal to cleanup thread it should exit */ 526 extern uint32_t iscsi_num_send_threads; /* the number of active send threads */ 527 528 extern uint8_t iscsi_InitiatorName[ISCSI_STRING_LENGTH]; 529 extern uint8_t iscsi_InitiatorAlias[ISCSI_STRING_LENGTH]; 530 extern login_isid_t iscsi_InitiatorISID; 531 532 /* Debugging stuff */ 533 534 #ifndef DDB 535 #define Debugger() panic("should call debugger here (iscsi.c)") 536 #endif /* ! DDB */ 537 538 #ifdef ISCSI_DEBUG 539 540 extern int iscsi_debug_level; /* How much debug info to display */ 541 542 #define DEBOUT(x) printf x 543 #define DEB(lev,x) { if (iscsi_debug_level >= lev) printf x ;} 544 #define DEBC(conn,lev,x) { if (iscsi_debug_level >= lev) { printf("S%dC%d: ", \ 545 conn ? conn->session->id : -1, \ 546 conn ? conn->id : -1); printf x ;}} 547 void iscsi_hexdump(void *buf, int len); 548 549 #define STATIC static 550 551 #else 552 553 #define DEBOUT(x) 554 #define DEB(lev,x) 555 #define DEBC(conn,lev,x) 556 #define iscsi_hexdump(a,b) 557 558 #define STATIC static 559 560 #endif 561 562 /* Critical section macros */ 563 564 /* misc stuff */ 565 #define min(a, b) ((a) < (b)) ? (a) : (b) 566 #define max(a, b) ((a) < (b)) ? (b) : (a) 567 568 569 /* 570 Convert unsigned int to 3-byte value (for DataSegmentLength field in PDU) 571 */ 572 573 static __inline void 574 hton3(uint32_t val, uint8_t *bytes) 575 { 576 bytes[0] = (uint8_t) (val >> 16); 577 bytes[1] = (uint8_t) (val >> 8); 578 bytes[2] = (uint8_t) val; 579 } 580 581 /* 582 Convert 3-byte value to unsigned int (for DataSegmentLength field in PDU) 583 */ 584 585 static __inline uint32_t 586 ntoh3(uint8_t *bytes) 587 { 588 return (bytes[0] << 16) | (bytes[1] << 8) | bytes[2]; 589 } 590 591 592 /* 593 * Convert uint64 to network byte order (for LUN field in PDU) 594 */ 595 static __inline uint64_t 596 htonq(uint64_t x) 597 { 598 #if BYTE_ORDER == LITTLE_ENDIAN 599 uint8_t *s = (uint8_t *) & x; 600 return (uint64_t) ((uint64_t) s[0] << 56 | (uint64_t) s[1] << 48 | 601 (uint64_t) s[2] << 40 | (uint64_t) s[3] << 32 | 602 (uint64_t) s[4] << 24 | (uint64_t) s[5] << 16 | 603 (uint64_t) s[6] << 8 | (uint64_t) s[7]); 604 #else 605 return x; 606 #endif 607 } 608 609 #define ntohq(x) htonq(x) 610 611 /* 612 * Serial number buffer empty? 613 */ 614 615 static __inline bool 616 sn_empty(sernum_buffer_t *buf) 617 { 618 return buf->top == buf->bottom; 619 } 620 621 622 /* 623 * Serial number compare 624 */ 625 626 static __inline bool 627 sn_a_lt_b(uint32_t a, uint32_t b) 628 { 629 return (a < b && !((b - a) & 0x80000000)) || 630 (a > b && ((a - b) & 0x80000000)); 631 } 632 633 static __inline bool 634 sn_a_le_b(uint32_t a, uint32_t b) 635 { 636 return (a <= b && !((b - a) & 0x80000000)) || 637 (a >= b && ((a - b) & 0x80000000)); 638 } 639 640 /* in iscsi_ioctl.c */ 641 642 void iscsi_init_cleanup(void); 643 void iscsi_destroy_cleanup(void); 644 void iscsi_notify_cleanup(void); 645 646 647 /* Parameter for logout is reason code in logout PDU, -1 for don't send logout */ 648 #define NO_LOGOUT -1 649 #define LOGOUT_SESSION 0 650 #define LOGOUT_CONNECTION 1 651 #define RECOVER_CONNECTION 2 652 653 void add_event(iscsi_event_t, uint32_t, uint32_t, uint32_t); 654 655 void kill_connection(connection_t *, uint32_t, int, bool); 656 void kill_session(session_t *, uint32_t, int, bool); 657 void kill_all_sessions(void); 658 void handle_connection_error(connection_t *, uint32_t, int); 659 void add_connection_cleanup(connection_t *); 660 661 #ifndef ISCSI_MINIMAL 662 uint32_t map_databuf(struct proc *, void **, uint32_t); 663 void unmap_databuf(struct proc *, void *, uint32_t); 664 #endif 665 int iscsiioctl(struct file *, u_long, void *); 666 667 session_t *find_session(uint32_t); 668 connection_t *find_connection(session_t *, uint32_t); 669 670 671 /* in iscsi_main.c */ 672 673 /*void iscsiattach(void *); */ 674 int iscsidetach(device_t, int); 675 676 void iscsi_done(ccb_t *); 677 int map_session(session_t *, device_t); 678 int unmap_session(session_t *); 679 680 /* in iscsi_send.c */ 681 682 void iscsi_send_thread(void *); 683 684 connection_t *assign_connection(session_t *session, bool waitok); 685 void resend_pdu(ccb_t *); 686 int send_login(connection_t *); 687 int send_logout(connection_t *, connection_t *, int, bool); 688 int send_data_out(connection_t *, pdu_t *, ccb_t *, ccb_disp_t, bool); 689 void send_run_xfer(session_t *, struct scsipi_xfer *); 690 int send_send_targets(session_t *, uint8_t *); 691 int send_task_management(connection_t *, ccb_t *, struct scsipi_xfer *, int); 692 693 void negotiate_login(connection_t *, pdu_t *, ccb_t *); 694 void acknowledge_text(connection_t *, pdu_t *, ccb_t *); 695 void start_text_negotiation(connection_t *); 696 void negotiate_text(connection_t *, pdu_t *, ccb_t *); 697 int send_nop_out(connection_t *, pdu_t *); 698 void snack_missing(connection_t *, ccb_t *, uint8_t, uint32_t, uint32_t); 699 void send_snack(connection_t *, pdu_t *, ccb_t *, uint8_t); 700 int send_send_targets(session_t *, uint8_t *); 701 702 void send_command(ccb_t *, ccb_disp_t, bool, bool); 703 #ifndef ISCSI_MINIMAL 704 int send_io_command(session_t *, uint64_t, scsireq_t *, bool, uint32_t); 705 #endif 706 707 void connection_timeout_co(void *); 708 void ccb_timeout_co(void *); 709 710 void connection_timeout(connection_t *); 711 void connection_timeout_start(connection_t *, int); 712 void connection_timeout_stop(connection_t *); 713 void ccb_timeout(ccb_t *); 714 void ccb_timeout_start(ccb_t *, int); 715 void ccb_timeout_stop(ccb_t *); 716 717 /* in iscsi_rcv.c */ 718 719 void iscsi_rcv_thread(void *); 720 721 /* in iscsi_utils.c */ 722 723 uint32_t gen_digest(void *, int); 724 uint32_t gen_digest_2(void *, int, void *, int); 725 726 void create_ccbs(session_t *); 727 ccb_t *get_ccb(connection_t *, bool); 728 void free_ccb(ccb_t *); 729 void suspend_ccb(ccb_t *, bool); 730 void throttle_ccb(ccb_t *, bool); 731 void wake_ccb(ccb_t *, uint32_t); 732 733 void create_pdus(connection_t *); 734 pdu_t *get_pdu(connection_t *, bool); 735 void free_pdu(pdu_t *); 736 737 void init_sernum(sernum_buffer_t *); 738 int add_sernum(sernum_buffer_t *, uint32_t); 739 uint32_t ack_sernum(sernum_buffer_t *, uint32_t); 740 741 uint32_t get_sernum(session_t *, bool); 742 int sernum_in_window(session_t *); 743 744 /* in iscsi_text.c */ 745 746 int assemble_login_parameters(connection_t *, ccb_t *, pdu_t *); 747 int assemble_security_parameters(connection_t *, ccb_t *, pdu_t *, pdu_t *); 748 int assemble_negotiation_parameters(connection_t *, ccb_t *, pdu_t *, pdu_t *); 749 int init_text_parameters(connection_t *, ccb_t *); 750 int assemble_send_targets(pdu_t *, uint8_t *); 751 void set_negotiated_parameters(ccb_t *); 752 753 #endif /* !_ISCSI_GLOBALS_H */ 754
Indexes created Mon Sep 29 21:09:56 GMT 2025