iscsi_globals.h revision 1.14
1 /* $NetBSD: iscsi_globals.h,v 1.14 2016/05/29 13:51:16 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; 187 188 189 typedef struct connection_s connection_t; 190 typedef struct session_s session_t; 191 typedef struct ccb_s ccb_t; 192 typedef struct pdu_s pdu_t; 193 194 /* the serial number management structure (a circular buffer) */ 195 196 typedef struct { 197 uint32_t ExpSN; /* ExpxxSN (Data or Stat) sent to the target */ 198 uint32_t next_sn; /* next_sn (== ExpSN if no ack is pending) */ 199 int top; /* top of buffer (newest element) */ 200 int bottom; /* bottom of buffer (oldest element) */ 201 uint32_t sernum[SERNUM_BUFFER_LENGTH]; /* the serial numbers */ 202 bool ack[SERNUM_BUFFER_LENGTH]; /* acknowledged? */ 203 } sernum_buffer_t; 204 205 206 /* 207 The per-PDU data structure. 208 */ 209 210 struct pdu_s { 211 TAILQ_ENTRY(pdu_s) chain; /* freelist or wait list (or no list) */ 212 TAILQ_ENTRY(pdu_s) send_chain; 213 /* chaining PDUs waiting to be sent */ 214 pdu_disp_t disp; /* what to do with this pdu */ 215 uint32_t flags; /* various processing flags */ 216 pdu_header_t pdu; /* Buffer for PDU associated with cmd */ 217 void *temp_data; /* (free after use) */ 218 uint32_t temp_data_len; /* size of temp data */ 219 220 struct uio uio; /* UIO structure */ 221 struct iovec io_vec[4]; 222 /* Header + data + data-digest + padding */ 223 224 struct uio save_uio; 225 /* UIO structure save for retransmits */ 226 struct iovec save_iovec[4]; 227 /* Header + data + data-digest + padding */ 228 uint32_t data_digest; 229 /* holds data digest if enabled */ 230 ccb_t *owner; 231 /* the ccb this PDU belongs to (if any) */ 232 connection_t *connection; 233 /* the connection this PDU belongs to */ 234 }; 235 236 237 /* the PDU list type */ 238 239 TAILQ_HEAD(pdu_list_s, pdu_s); 240 typedef struct pdu_list_s pdu_list_t; 241 242 /* 243 The per-command data structure. Calling it ccb in correspondence 244 to other HA drivers. 245 */ 246 247 struct ccb_s { 248 TAILQ_ENTRY(ccb_s) chain; 249 /* either freelist or waiting list (or no list) */ 250 251 uint32_t status; /* Status gets entered here */ 252 ccb_disp_t disp; /* what to do with this ccb */ 253 254 struct callout timeout; /* To make sure it isn't lost */ 255 TAILQ_ENTRY(ccb_s) tchain; 256 int num_timeouts; 257 /* How often we've sent out SNACK without answer */ 258 int total_tries; 259 /* How often we've tried to recover */ 260 261 uint32_t ITT; 262 /* task tag: ITT counter + sess id + CCB index */ 263 sernum_buffer_t DataSN_buf; 264 /* Received Data Seq nums (read ops only) */ 265 266 void *par; 267 /* misc. parameter for this request */ 268 struct scsipi_xfer *xs; 269 /* the scsipi_xfer for this cmd */ 270 271 void *temp_data; 272 /* to hold state (mainly during negotiation) */ 273 void *text_data; 274 /* holds accumulated text for continued PDUs */ 275 uint32_t text_len; 276 /* length of text data so far */ 277 278 uint64_t lun; /* LUN */ 279 uint8_t *cmd; /* SCSI command block */ 280 uint16_t cmdlen; /* SCSI command block length */ 281 bool data_in; /* if this is a read request */ 282 uint8_t *data_ptr; /* data pointer for read/write */ 283 uint32_t data_len; /* total data length */ 284 uint32_t xfer_len; /* data transferred on read */ 285 uint32_t residual; /* residual data size */ 286 287 void *sense_ptr; /* sense data pointer */ 288 int sense_len_req; /* requested sense data length */ 289 int sense_len_got; /* actual sense data length */ 290 291 pdu_t *pdu_waiting; /* PDU waiting to be ack'ed */ 292 uint32_t CmdSN; /* CmdSN associated with waiting PDU */ 293 294 int flags; 295 connection_t *connection; /* connection for CCB */ 296 session_t *session; /* session for CCB */ 297 }; 298 299 300 /* the CCB list type */ 301 302 TAILQ_HEAD(ccb_list_s, ccb_s); 303 typedef struct ccb_list_s ccb_list_t; 304 305 306 /* 307 Per connection data: the connection structure 308 */ 309 struct connection_s { 310 TAILQ_ENTRY(connection_s) connections; 311 312 kmutex_t lock; 313 kcondvar_t conn_cv; 314 kcondvar_t ccb_cv; 315 kcondvar_t idle_cv; 316 317 pdu_list_t pdu_pool; /* the free PDU pool */ 318 319 ccb_list_t ccbs_waiting; 320 /* CCBs waiting for completion */ 321 322 pdu_list_t pdus_to_send; 323 /* the PDUs waiting to be sent */ 324 325 sernum_buffer_t StatSN_buf; 326 /* to keep track of received StatSNs */ 327 328 uint32_t max_transfer; 329 /* min(MaxRecvDataSegmentLength, MaxBurstLength) */ 330 uint32_t max_firstimmed; 331 /* 0 if InitialR2T=Yes, else 332 min of (MaxRecvDataSegmentLength, FirstBurstLength) */ 333 uint32_t max_firstdata; 334 /* 0 if ImmediateData=No, else min of */ 335 /* (MaxRecvDataSegmentLength, FirstBurstLength) */ 336 337 uint32_t MaxRecvDataSegmentLength; 338 /* Target's value */ 339 uint32_t Our_MaxRecvDataSegmentLength; 340 /* Our own value */ 341 bool HeaderDigest; /* TRUE if doing CRC */ 342 bool DataDigest; /* TRUE if doing CRC */ 343 uint32_t Time2Wait; 344 /* Negotiated default or logout value */ 345 uint32_t Time2Retain; 346 /* Negotiated default or logout value */ 347 348 uint16_t id; 349 /* connection ID (unique within session) */ 350 351 conn_state_t state; /* State of connection */ 352 353 struct lwp *threadobj; 354 /* proc/thread pointer of socket owner */ 355 struct file *sock; /* the connection's socket */ 356 session_t *session; 357 /* back pointer to the owning session */ 358 359 struct lwp *rcvproc; /* receive thread */ 360 struct lwp *sendproc; /* send thread */ 361 362 uint32_t terminating; 363 /* if closing down: status */ 364 int recover; /* recovery count */ 365 /* (reset on first successful data transfer) */ 366 unsigned usecount; /* number of active CCBs */ 367 368 bool destroy; /* conn will be destroyed */ 369 bool in_session; 370 /* if it's linked into the session list */ 371 logout_state_t loggedout; 372 /* status of logout (for recovery) */ 373 struct callout timeout; 374 /* Timeout for checking if connection is dead */ 375 TAILQ_ENTRY(connection_s) tchain; 376 int num_timeouts; 377 /* How often we've sent out a NOP without answer */ 378 uint32_t idle_timeout_val; 379 /* Connection timeout value when idle */ 380 381 iscsi_login_parameters_t *login_par; 382 /* only valid during login */ 383 384 pdu_t pdu[PDUS_PER_CONNECTION]; /* PDUs */ 385 }; 386 387 /* the connection list type */ 388 389 TAILQ_HEAD(connection_list_s, connection_s); 390 typedef struct connection_list_s connection_list_t; 391 392 393 /* 394 Per session data: the session structure 395 */ 396 397 struct session_s { 398 /* Interface to child drivers. 399 NOTE: sc_adapter MUST be the first field in this structure so we can 400 easily get from adapter to session. 401 */ 402 struct scsipi_adapter sc_adapter; 403 struct scsipi_channel sc_channel; 404 405 device_t child_dev; 406 /* the child we're associated with - (NULL if not mapped) */ 407 408 /* local stuff */ 409 TAILQ_ENTRY(session_s) sessions; /* the list of sessions */ 410 411 kmutex_t lock; 412 kcondvar_t sess_cv; 413 kcondvar_t ccb_cv; 414 415 ccb_list_t ccb_pool; /* The free CCB pool */ 416 ccb_list_t ccbs_throttled; 417 /* CCBs waiting for MaxCmdSN to increase */ 418 419 uint16_t id; /* session ID (unique within driver) */ 420 uint16_t TSIH; /* Target assigned session ID */ 421 422 uint32_t CmdSN; /* Current CmdSN */ 423 uint32_t ExpCmdSN; /* Current max ExpCmdSN received */ 424 uint32_t MaxCmdSN; /* Current MaxCmdSN */ 425 426 /* negotiated values */ 427 uint32_t ErrorRecoveryLevel; 428 uint32_t FirstBurstLength; 429 uint32_t MaxBurstLength; 430 bool ImmediateData; 431 bool InitialR2T; 432 uint32_t MaxOutstandingR2T; 433 uint32_t MaxConnections; 434 uint32_t DefaultTime2Wait; 435 uint32_t DefaultTime2Retain; 436 437 iscsi_login_session_type_t login_type; /* session type */ 438 439 /* for send_targets requests */ 440 uint8_t *target_list; 441 uint32_t target_list_len; 442 443 uint32_t conn_id; /* connection ID counter */ 444 445 uint32_t terminating; /* if closing down: status */ 446 447 uint32_t active_connections; 448 /* currently active connections */ 449 uint32_t total_connections; 450 /* connections associated with this session (active or winding down) */ 451 connection_list_t conn_list; /* the list of connections */ 452 connection_t *mru_connection; 453 /* the most recently used connection */ 454 455 uint8_t itt_id; /* counter for use in ITT */ 456 457 ccb_t ccb[CCBS_PER_SESSION]; /* CCBs */ 458 459 char tgtname[ISCSI_STRING_LENGTH + 1]; 460 /* iSCSI target name */ 461 }; 462 463 /* the session list type */ 464 465 TAILQ_HEAD(session_list_s, session_s); 466 typedef struct session_list_s session_list_t; 467 468 469 /* 470 Event notification structures 471 */ 472 473 typedef struct event_s { 474 TAILQ_ENTRY(event_s) link; /* next event in queue */ 475 iscsi_event_t event_kind; /* which event */ 476 uint32_t session_id; /* affected session ID */ 477 uint32_t connection_id; /* affected connection ID */ 478 uint32_t reason; /* event reason */ 479 } event_t; 480 481 /* the event list entry type */ 482 483 TAILQ_HEAD(event_list_s, event_s); 484 typedef struct event_list_s event_list_t; 485 486 487 typedef struct event_handler_s { 488 TAILQ_ENTRY(event_handler_s) link; /* next handler */ 489 uint32_t id; /* unique ID */ 490 event_list_t events; /* list of events pending */ 491 iscsi_wait_event_parameters_t *waiter; /* waiting parameter */ 492 /* following to detect dead handlers */ 493 event_t *first_in_list; 494 } event_handler_t; 495 496 /* the event list entry type */ 497 498 TAILQ_HEAD(event_handler_list_s, event_handler_s); 499 typedef struct event_handler_list_s event_handler_list_t; 500 501 /* /dev/iscsi0 state */ 502 struct iscsifd { 503 TAILQ_ENTRY(iscsifd) link; 504 device_t dev; 505 int unit; 506 }; 507 508 /* ------------------------- Global Variables ----------------------------- */ 509 510 /* In iscsi_main.c */ 511 512 extern struct cfattach iscsi_ca; /* the device attach structure */ 513 514 extern session_list_t iscsi_sessions; /* the list of sessions */ 515 extern bool iscsi_detaching; /* signal to cleanup thread it should exit */ 516 extern uint32_t iscsi_num_send_threads; /* the number of active send threads */ 517 518 extern uint8_t iscsi_InitiatorName[ISCSI_STRING_LENGTH]; 519 extern uint8_t iscsi_InitiatorAlias[ISCSI_STRING_LENGTH]; 520 extern login_isid_t iscsi_InitiatorISID; 521 522 /* Debugging stuff */ 523 524 #ifndef DDB 525 #define Debugger() panic("should call debugger here (iscsi.c)") 526 #endif /* ! DDB */ 527 528 #ifdef ISCSI_DEBUG 529 530 extern int iscsi_debug_level; /* How much debug info to display */ 531 532 #define DEBOUT(x) printf x 533 #define DEB(lev,x) { if (iscsi_debug_level >= lev) printf x ;} 534 #define DEBC(conn,lev,x) { if (iscsi_debug_level >= lev) { printf("S%dC%d: ", \ 535 conn ? conn->session->id : -1, \ 536 conn ? conn->id : -1); printf x ;}} 537 void iscsi_hexdump(void *buf, int len); 538 539 #define STATIC static 540 541 #else 542 543 #define DEBOUT(x) 544 #define DEB(lev,x) 545 #define DEBC(conn,lev,x) 546 #define iscsi_hexdump(a,b) 547 548 #define STATIC static 549 550 #endif 551 552 /* Critical section macros */ 553 554 /* misc stuff */ 555 #define min(a, b) ((a) < (b)) ? (a) : (b) 556 #define max(a, b) ((a) < (b)) ? (b) : (a) 557 558 559 /* 560 Convert unsigned int to 3-byte value (for DataSegmentLength field in PDU) 561 */ 562 563 static __inline void 564 hton3(uint32_t val, uint8_t *bytes) 565 { 566 bytes[0] = (uint8_t) (val >> 16); 567 bytes[1] = (uint8_t) (val >> 8); 568 bytes[2] = (uint8_t) val; 569 } 570 571 /* 572 Convert 3-byte value to unsigned int (for DataSegmentLength field in PDU) 573 */ 574 575 static __inline uint32_t 576 ntoh3(uint8_t *bytes) 577 { 578 return (bytes[0] << 16) | (bytes[1] << 8) | bytes[2]; 579 } 580 581 582 /* 583 * Convert uint64 to network byte order (for LUN field in PDU) 584 */ 585 static __inline uint64_t 586 htonq(uint64_t x) 587 { 588 #if BYTE_ORDER == LITTLE_ENDIAN 589 uint8_t *s = (uint8_t *) & x; 590 return (uint64_t) ((uint64_t) s[0] << 56 | (uint64_t) s[1] << 48 | 591 (uint64_t) s[2] << 40 | (uint64_t) s[3] << 32 | 592 (uint64_t) s[4] << 24 | (uint64_t) s[5] << 16 | 593 (uint64_t) s[6] << 8 | (uint64_t) s[7]); 594 #else 595 return x; 596 #endif 597 } 598 599 #define ntohq(x) htonq(x) 600 601 /* 602 * Serial number buffer empty? 603 */ 604 605 static __inline bool 606 sn_empty(sernum_buffer_t *buf) 607 { 608 return buf->top == buf->bottom; 609 } 610 611 612 /* 613 * Serial number compare 614 */ 615 616 static __inline bool 617 sn_a_lt_b(uint32_t a, uint32_t b) 618 { 619 return (a < b && !((b - a) & 0x80000000)) || 620 (a > b && ((a - b) & 0x80000000)); 621 } 622 623 static __inline bool 624 sn_a_le_b(uint32_t a, uint32_t b) 625 { 626 return (a <= b && !((b - a) & 0x80000000)) || 627 (a >= b && ((a - b) & 0x80000000)); 628 } 629 630 /* in iscsi_ioctl.c */ 631 632 void iscsi_init_cleanup(void); 633 void iscsi_destroy_cleanup(void); 634 void iscsi_notify_cleanup(void); 635 636 637 /* Parameter for logout is reason code in logout PDU, -1 for don't send logout */ 638 #define NO_LOGOUT -1 639 #define LOGOUT_SESSION 0 640 #define LOGOUT_CONNECTION 1 641 #define RECOVER_CONNECTION 2 642 643 void add_event(iscsi_event_t, uint32_t, uint32_t, uint32_t); 644 645 void kill_connection(connection_t *, uint32_t, int, bool); 646 void kill_session(session_t *, uint32_t, int, bool); 647 void kill_all_sessions(void); 648 void handle_connection_error(connection_t *, uint32_t, int); 649 void add_connection_cleanup(connection_t *); 650 651 #ifndef ISCSI_MINIMAL 652 uint32_t map_databuf(struct proc *, void **, uint32_t); 653 void unmap_databuf(struct proc *, void *, uint32_t); 654 #endif 655 int iscsiioctl(struct file *, u_long, void *); 656 657 session_t *find_session(uint32_t); 658 connection_t *find_connection(session_t *, uint32_t); 659 660 661 /* in iscsi_main.c */ 662 663 /*void iscsiattach(void *); */ 664 int iscsidetach(device_t, int); 665 666 void iscsi_done(ccb_t *); 667 int map_session(session_t *, device_t); 668 int unmap_session(session_t *); 669 670 /* in iscsi_send.c */ 671 672 void iscsi_send_thread(void *); 673 674 connection_t *assign_connection(session_t *session, bool waitok); 675 void resend_pdu(ccb_t *); 676 int send_login(connection_t *); 677 int send_logout(connection_t *, connection_t *, int, bool); 678 int send_data_out(connection_t *, pdu_t *, ccb_t *, ccb_disp_t, bool); 679 void send_run_xfer(session_t *, struct scsipi_xfer *); 680 int send_send_targets(session_t *, uint8_t *); 681 int send_task_management(connection_t *, ccb_t *, struct scsipi_xfer *, int); 682 683 void negotiate_login(connection_t *, pdu_t *, ccb_t *); 684 void acknowledge_text(connection_t *, pdu_t *, ccb_t *); 685 void start_text_negotiation(connection_t *); 686 void negotiate_text(connection_t *, pdu_t *, ccb_t *); 687 int send_nop_out(connection_t *, pdu_t *); 688 void snack_missing(connection_t *, ccb_t *, uint8_t, uint32_t, uint32_t); 689 void send_snack(connection_t *, pdu_t *, ccb_t *, uint8_t); 690 int send_send_targets(session_t *, uint8_t *); 691 692 void send_command(ccb_t *, ccb_disp_t, bool, bool); 693 #ifndef ISCSI_MINIMAL 694 int send_io_command(session_t *, uint64_t, scsireq_t *, bool, uint32_t); 695 #endif 696 697 void connection_timeout_co(void *); 698 void ccb_timeout_co(void *); 699 700 void connection_timeout(connection_t *); 701 void ccb_timeout(ccb_t *); 702 703 /* in iscsi_rcv.c */ 704 705 void iscsi_rcv_thread(void *); 706 707 /* in iscsi_utils.c */ 708 709 uint32_t gen_digest(void *, int); 710 uint32_t gen_digest_2(void *, int, void *, int); 711 712 void create_ccbs(session_t *); 713 ccb_t *get_ccb(connection_t *, bool); 714 void free_ccb(ccb_t *); 715 void suspend_ccb(ccb_t *, bool); 716 void throttle_ccb(ccb_t *, bool); 717 void wake_ccb(ccb_t *, uint32_t); 718 719 void create_pdus(connection_t *); 720 pdu_t *get_pdu(connection_t *, bool); 721 void free_pdu(pdu_t *); 722 723 void init_sernum(sernum_buffer_t *); 724 int add_sernum(sernum_buffer_t *, uint32_t); 725 uint32_t ack_sernum(sernum_buffer_t *, uint32_t); 726 727 /* in iscsi_text.c */ 728 729 int assemble_login_parameters(connection_t *, ccb_t *, pdu_t *); 730 int assemble_security_parameters(connection_t *, ccb_t *, pdu_t *, pdu_t *); 731 int assemble_negotiation_parameters(connection_t *, ccb_t *, pdu_t *, pdu_t *); 732 int init_text_parameters(connection_t *, ccb_t *); 733 int assemble_send_targets(pdu_t *, uint8_t *); 734 void set_negotiated_parameters(ccb_t *); 735 736 #endif /* !_ISCSI_GLOBALS_H */ 737
Indexes created Sun Sep 28 07:09:56 GMT 2025