ctl_frontend_iscsi.c revision 272613
1230557Sjimharris/*- 2230557Sjimharris * Copyright (c) 2012 The FreeBSD Foundation 3230557Sjimharris * All rights reserved. 4230557Sjimharris * 5230557Sjimharris * This software was developed by Edward Tomasz Napierala under sponsorship 6230557Sjimharris * from the FreeBSD Foundation. 7230557Sjimharris * 8230557Sjimharris * Redistribution and use in source and binary forms, with or without 9230557Sjimharris * modification, are permitted provided that the following conditions 10230557Sjimharris * are met: 11230557Sjimharris * 1. Redistributions of source code must retain the above copyright 12230557Sjimharris * notice, this list of conditions and the following disclaimer. 13230557Sjimharris * 2. Redistributions in binary form must reproduce the above copyright 14230557Sjimharris * notice, this list of conditions and the following disclaimer in the 15230557Sjimharris * documentation and/or other materials provided with the distribution. 16230557Sjimharris * 17230557Sjimharris * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18230557Sjimharris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19230557Sjimharris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20230557Sjimharris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21230557Sjimharris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22230557Sjimharris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23230557Sjimharris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24230557Sjimharris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25230557Sjimharris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26230557Sjimharris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27230557Sjimharris * SUCH DAMAGE. 28230557Sjimharris * 29230557Sjimharris * $FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 272613 2014-10-06 12:20:46Z mav $ 30230557Sjimharris */ 31230557Sjimharris 32230557Sjimharris/* 33230557Sjimharris * CTL frontend for the iSCSI protocol. 34230557Sjimharris */ 35230557Sjimharris 36230557Sjimharris#include <sys/cdefs.h> 37230557Sjimharris__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 272613 2014-10-06 12:20:46Z mav $"); 38230557Sjimharris 39230557Sjimharris#include <sys/param.h> 40230557Sjimharris#include <sys/capsicum.h> 41230557Sjimharris#include <sys/condvar.h> 42230557Sjimharris#include <sys/file.h> 43230557Sjimharris#include <sys/kernel.h> 44230557Sjimharris#include <sys/kthread.h> 45230557Sjimharris#include <sys/lock.h> 46230557Sjimharris#include <sys/malloc.h> 47230557Sjimharris#include <sys/module.h> 48230557Sjimharris#include <sys/mutex.h> 49230557Sjimharris#include <sys/queue.h> 50230557Sjimharris#include <sys/sbuf.h> 51230557Sjimharris#include <sys/sysctl.h> 52230557Sjimharris#include <sys/systm.h> 53230557Sjimharris#include <sys/uio.h> 54230557Sjimharris#include <sys/unistd.h> 55230557Sjimharris#include <vm/uma.h> 56230557Sjimharris 57230557Sjimharris#include <cam/scsi/scsi_all.h> 58230557Sjimharris#include <cam/scsi/scsi_da.h> 59230557Sjimharris#include <cam/ctl/ctl_io.h> 60230557Sjimharris#include <cam/ctl/ctl.h> 61230557Sjimharris#include <cam/ctl/ctl_backend.h> 62230557Sjimharris#include <cam/ctl/ctl_error.h> 63230557Sjimharris#include <cam/ctl/ctl_frontend.h> 64230557Sjimharris#include <cam/ctl/ctl_frontend_internal.h> 65230557Sjimharris#include <cam/ctl/ctl_debug.h> 66230557Sjimharris#include <cam/ctl/ctl_ha.h> 67230557Sjimharris#include <cam/ctl/ctl_ioctl.h> 68230557Sjimharris#include <cam/ctl/ctl_private.h> 69230557Sjimharris 70230557Sjimharris#include <dev/iscsi/icl.h> 71230557Sjimharris#include <dev/iscsi/iscsi_proto.h> 72230557Sjimharris#include <cam/ctl/ctl_frontend_iscsi.h> 73230557Sjimharris 74230557Sjimharris#ifdef ICL_KERNEL_PROXY 75230557Sjimharris#include <sys/socketvar.h> 76230557Sjimharris#endif 77230557Sjimharris 78230557Sjimharris#ifdef ICL_KERNEL_PROXY 79230557SjimharrisFEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80230557Sjimharris#endif 81230557Sjimharris 82230557Sjimharrisstatic MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83230557Sjimharrisstatic uma_zone_t cfiscsi_data_wait_zone; 84230557Sjimharris 85230557SjimharrisSYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86230557Sjimharris "CAM Target Layer iSCSI Frontend"); 87230557Sjimharrisstatic int debug = 3; 88230557SjimharrisSYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89230557Sjimharris &debug, 1, "Enable debug messages"); 90230557Sjimharrisstatic int ping_timeout = 5; 91230557SjimharrisSYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92230557Sjimharris &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93230557Sjimharrisstatic int login_timeout = 60; 94230557SjimharrisSYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 95230557Sjimharris &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 96230557Sjimharrisstatic int maxcmdsn_delta = 256; 97230557SjimharrisSYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 98230557Sjimharris &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99230557Sjimharris "without confirmation"); 100230557Sjimharris 101230557Sjimharris#define CFISCSI_DEBUG(X, ...) \ 102230557Sjimharris do { \ 103230557Sjimharris if (debug > 1) { \ 104230557Sjimharris printf("%s: " X "\n", \ 105230557Sjimharris __func__, ## __VA_ARGS__); \ 106230557Sjimharris } \ 107230557Sjimharris } while (0) 108230557Sjimharris 109230557Sjimharris#define CFISCSI_WARN(X, ...) \ 110230557Sjimharris do { \ 111230557Sjimharris if (debug > 0) { \ 112230557Sjimharris printf("WARNING: %s: " X "\n", \ 113230557Sjimharris __func__, ## __VA_ARGS__); \ 114230557Sjimharris } \ 115230557Sjimharris } while (0) 116230557Sjimharris 117230557Sjimharris#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 118230557Sjimharris do { \ 119230557Sjimharris if (debug > 1) { \ 120230557Sjimharris printf("%s: %s (%s): " X "\n", \ 121230557Sjimharris __func__, S->cs_initiator_addr, \ 122230557Sjimharris S->cs_initiator_name, ## __VA_ARGS__); \ 123230557Sjimharris } \ 124230557Sjimharris } while (0) 125230557Sjimharris 126230557Sjimharris#define CFISCSI_SESSION_WARN(S, X, ...) \ 127230557Sjimharris do { \ 128230557Sjimharris if (debug > 0) { \ 129230557Sjimharris printf("WARNING: %s (%s): " X "\n", \ 130230557Sjimharris S->cs_initiator_addr, \ 131230557Sjimharris S->cs_initiator_name, ## __VA_ARGS__); \ 132230557Sjimharris } \ 133230557Sjimharris } while (0) 134230557Sjimharris 135230557Sjimharris#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 136230557Sjimharris#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 137230557Sjimharris#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 138230557Sjimharris 139230557Sjimharris#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 140230557Sjimharris#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 141230557Sjimharris#define PDU_EXPDATASN(X) (X)->ip_prv0 142230557Sjimharris#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 143230557Sjimharris#define PDU_R2TSN(X) (X)->ip_prv2 144230557Sjimharris 145230557Sjimharrisint cfiscsi_init(void); 146230557Sjimharrisstatic void cfiscsi_online(void *arg); 147230557Sjimharrisstatic void cfiscsi_offline(void *arg); 148230557Sjimharrisstatic int cfiscsi_info(void *arg, struct sbuf *sb); 149230557Sjimharrisstatic int cfiscsi_lun_enable(void *arg, 150230557Sjimharris struct ctl_id target_id, int lun_id); 151230557Sjimharrisstatic int cfiscsi_lun_disable(void *arg, 152230557Sjimharris struct ctl_id target_id, int lun_id); 153230557Sjimharrisstatic uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 154230557Sjimharrisstatic int cfiscsi_ioctl(struct cdev *dev, 155230557Sjimharris u_long cmd, caddr_t addr, int flag, struct thread *td); 156230557Sjimharrisstatic void cfiscsi_datamove(union ctl_io *io); 157230557Sjimharrisstatic void cfiscsi_datamove_in(union ctl_io *io); 158230557Sjimharrisstatic void cfiscsi_datamove_out(union ctl_io *io); 159230557Sjimharrisstatic void cfiscsi_done(union ctl_io *io); 160230557Sjimharrisstatic bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 161230557Sjimharrisstatic void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 162230557Sjimharrisstatic void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 163230557Sjimharrisstatic void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 164230557Sjimharrisstatic void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 165230557Sjimharrisstatic void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 166230557Sjimharrisstatic void cfiscsi_session_terminate(struct cfiscsi_session *cs); 167230557Sjimharrisstatic struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 168230557Sjimharris *softc, const char *name); 169230557Sjimharrisstatic struct cfiscsi_target *cfiscsi_target_find_or_create( 170230557Sjimharris struct cfiscsi_softc *softc, const char *name, const char *alias); 171230557Sjimharrisstatic void cfiscsi_target_release(struct cfiscsi_target *ct); 172230557Sjimharrisstatic void cfiscsi_session_delete(struct cfiscsi_session *cs); 173230557Sjimharris 174230557Sjimharrisstatic struct cfiscsi_softc cfiscsi_softc; 175230557Sjimharrisextern struct ctl_softc *control_softc; 176230557Sjimharris 177230557Sjimharrisstatic struct ctl_frontend cfiscsi_frontend = 178230557Sjimharris{ 179230557Sjimharris .name = "iscsi", 180230557Sjimharris .init = cfiscsi_init, 181230557Sjimharris .ioctl = cfiscsi_ioctl, 182230557Sjimharris}; 183230557SjimharrisCTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 184230557SjimharrisMODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 185230557Sjimharris 186230557Sjimharrisstatic struct icl_pdu * 187230557Sjimharriscfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 188230557Sjimharris{ 189230557Sjimharris 190230557Sjimharris return (icl_pdu_new_bhs(request->ip_conn, flags)); 191230557Sjimharris} 192230557Sjimharris 193230557Sjimharrisstatic bool 194230557Sjimharriscfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 195230557Sjimharris{ 196230557Sjimharris const struct iscsi_bhs_scsi_command *bhssc; 197230557Sjimharris struct cfiscsi_session *cs; 198230557Sjimharris uint32_t cmdsn, expstatsn; 199230557Sjimharris 200230557Sjimharris cs = PDU_SESSION(request); 201230557Sjimharris 202230557Sjimharris /* 203230557Sjimharris * Every incoming PDU - not just NOP-Out - resets the ping timer. 204230557Sjimharris * The purpose of the timeout is to reset the connection when it stalls; 205230557Sjimharris * we don't want this to happen when NOP-In or NOP-Out ends up delayed 206230557Sjimharris * in some queue. 207230557Sjimharris * 208230557Sjimharris * XXX: Locking? 209230557Sjimharris */ 210230557Sjimharris cs->cs_timeout = 0; 211230557Sjimharris 212230557Sjimharris /* 213230557Sjimharris * Data-Out PDUs don't contain CmdSN. 214230557Sjimharris */ 215230557Sjimharris if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 216230557Sjimharris ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 217230557Sjimharris return (false); 218230557Sjimharris 219230557Sjimharris /* 220230557Sjimharris * We're only using fields common for all the request 221230557Sjimharris * (initiator -> target) PDUs. 222230557Sjimharris */ 223230557Sjimharris bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 224230557Sjimharris cmdsn = ntohl(bhssc->bhssc_cmdsn); 225230557Sjimharris expstatsn = ntohl(bhssc->bhssc_expstatsn); 226230557Sjimharris 227230557Sjimharris CFISCSI_SESSION_LOCK(cs); 228230557Sjimharris#if 0 229230557Sjimharris if (expstatsn != cs->cs_statsn) { 230230557Sjimharris CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 231230557Sjimharris "while current StatSN is %d", expstatsn, 232230557Sjimharris cs->cs_statsn); 233230557Sjimharris } 234230557Sjimharris#endif 235230557Sjimharris 236230557Sjimharris /* 237230557Sjimharris * The target MUST silently ignore any non-immediate command outside 238230557Sjimharris * of this range. 239230557Sjimharris */ 240230557Sjimharris if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 241230557Sjimharris CFISCSI_SESSION_UNLOCK(cs); 242230557Sjimharris CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 243230557Sjimharris "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 244230557Sjimharris return (true); 245230557Sjimharris } 246230557Sjimharris 247230557Sjimharris if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 248230557Sjimharris cs->cs_cmdsn++; 249230557Sjimharris 250230557Sjimharris CFISCSI_SESSION_UNLOCK(cs); 251230557Sjimharris 252230557Sjimharris return (false); 253230557Sjimharris} 254230557Sjimharris 255230557Sjimharrisstatic void 256230557Sjimharriscfiscsi_pdu_handle(struct icl_pdu *request) 257230557Sjimharris{ 258230557Sjimharris struct cfiscsi_session *cs; 259230557Sjimharris bool ignore; 260230557Sjimharris 261230557Sjimharris cs = PDU_SESSION(request); 262230557Sjimharris 263230557Sjimharris ignore = cfiscsi_pdu_update_cmdsn(request); 264230557Sjimharris if (ignore) { 265230557Sjimharris icl_pdu_free(request); 266230557Sjimharris return; 267230557Sjimharris } 268230557Sjimharris 269230557Sjimharris /* 270230557Sjimharris * Handle the PDU; this includes e.g. receiving the remaining 271230557Sjimharris * part of PDU and submitting the SCSI command to CTL 272230557Sjimharris * or queueing a reply. The handling routine is responsible 273230557Sjimharris * for freeing the PDU when it's no longer needed. 274230557Sjimharris */ 275230557Sjimharris switch (request->ip_bhs->bhs_opcode & 276230557Sjimharris ~ISCSI_BHS_OPCODE_IMMEDIATE) { 277230557Sjimharris case ISCSI_BHS_OPCODE_NOP_OUT: 278230557Sjimharris cfiscsi_pdu_handle_nop_out(request); 279230557Sjimharris break; 280230557Sjimharris case ISCSI_BHS_OPCODE_SCSI_COMMAND: 281230557Sjimharris cfiscsi_pdu_handle_scsi_command(request); 282230557Sjimharris break; 283230557Sjimharris case ISCSI_BHS_OPCODE_TASK_REQUEST: 284230557Sjimharris cfiscsi_pdu_handle_task_request(request); 285230557Sjimharris break; 286230557Sjimharris case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 287230557Sjimharris cfiscsi_pdu_handle_data_out(request); 288230557Sjimharris break; 289230557Sjimharris case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 290230557Sjimharris cfiscsi_pdu_handle_logout_request(request); 291230557Sjimharris break; 292230557Sjimharris default: 293230557Sjimharris CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 294230557Sjimharris "opcode 0x%x; dropping connection", 295230557Sjimharris request->ip_bhs->bhs_opcode); 296230557Sjimharris icl_pdu_free(request); 297230557Sjimharris cfiscsi_session_terminate(cs); 298230557Sjimharris } 299230557Sjimharris 300230557Sjimharris} 301230557Sjimharris 302230557Sjimharrisstatic void 303230557Sjimharriscfiscsi_receive_callback(struct icl_pdu *request) 304230557Sjimharris{ 305230557Sjimharris struct cfiscsi_session *cs; 306230557Sjimharris 307230557Sjimharris cs = PDU_SESSION(request); 308230557Sjimharris 309230557Sjimharris#ifdef ICL_KERNEL_PROXY 310230557Sjimharris if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 311230557Sjimharris if (cs->cs_login_pdu == NULL) 312230557Sjimharris cs->cs_login_pdu = request; 313230557Sjimharris else 314230557Sjimharris icl_pdu_free(request); 315230557Sjimharris cv_signal(&cs->cs_login_cv); 316230557Sjimharris return; 317230557Sjimharris } 318230557Sjimharris#endif 319230557Sjimharris 320230557Sjimharris cfiscsi_pdu_handle(request); 321230557Sjimharris} 322230557Sjimharris 323230557Sjimharrisstatic void 324230557Sjimharriscfiscsi_error_callback(struct icl_conn *ic) 325230557Sjimharris{ 326230557Sjimharris struct cfiscsi_session *cs; 327230557Sjimharris 328230557Sjimharris cs = CONN_SESSION(ic); 329230557Sjimharris 330230557Sjimharris CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 331230557Sjimharris cfiscsi_session_terminate(cs); 332230557Sjimharris} 333230557Sjimharris 334230557Sjimharrisstatic int 335230557Sjimharriscfiscsi_pdu_prepare(struct icl_pdu *response) 336230557Sjimharris{ 337230557Sjimharris struct cfiscsi_session *cs; 338230557Sjimharris struct iscsi_bhs_scsi_response *bhssr; 339230557Sjimharris bool advance_statsn = true; 340230557Sjimharris 341230557Sjimharris cs = PDU_SESSION(response); 342230557Sjimharris 343230557Sjimharris CFISCSI_SESSION_LOCK_ASSERT(cs); 344230557Sjimharris 345230557Sjimharris /* 346230557Sjimharris * We're only using fields common for all the response 347230557Sjimharris * (target -> initiator) PDUs. 348230557Sjimharris */ 349230557Sjimharris bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 350230557Sjimharris 351230557Sjimharris /* 352230557Sjimharris * 10.8.3: "The StatSN for this connection is not advanced 353230557Sjimharris * after this PDU is sent." 354230557Sjimharris */ 355230557Sjimharris if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 356230557Sjimharris advance_statsn = false; 357230557Sjimharris 358230557Sjimharris /* 359230557Sjimharris * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 360230557Sjimharris * StatSN for the connection is not advanced after this PDU is sent." 361230557Sjimharris */ 362230557Sjimharris if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 363230557Sjimharris bhssr->bhssr_initiator_task_tag == 0xffffffff) 364230557Sjimharris advance_statsn = false; 365230557Sjimharris 366230557Sjimharris /* 367230557Sjimharris * See the comment below - StatSN is not meaningful and must 368230557Sjimharris * not be advanced. 369230557Sjimharris */ 370230557Sjimharris if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 371230557Sjimharris advance_statsn = false; 372230557Sjimharris 373 /* 374 * 10.7.3: "The fields StatSN, Status, and Residual Count 375 * only have meaningful content if the S bit is set to 1." 376 */ 377 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 378 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 379 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 380 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 381 382 if (advance_statsn) 383 cs->cs_statsn++; 384 385 return (0); 386} 387 388static void 389cfiscsi_pdu_queue(struct icl_pdu *response) 390{ 391 struct cfiscsi_session *cs; 392 393 cs = PDU_SESSION(response); 394 395 CFISCSI_SESSION_LOCK(cs); 396 cfiscsi_pdu_prepare(response); 397 icl_pdu_queue(response); 398 CFISCSI_SESSION_UNLOCK(cs); 399} 400 401static uint32_t 402cfiscsi_decode_lun(uint64_t encoded) 403{ 404 uint8_t lun[8]; 405 uint32_t result; 406 407 /* 408 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 409 * but is in fact an evil, multidimensional structure defined 410 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 411 */ 412 memcpy(lun, &encoded, sizeof(lun)); 413 switch (lun[0] & 0xC0) { 414 case 0x00: 415 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 416 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 417 CFISCSI_WARN("malformed LUN " 418 "(peripheral device addressing method): 0x%jx", 419 (uintmax_t)encoded); 420 result = 0xffffffff; 421 break; 422 } 423 result = lun[1]; 424 break; 425 case 0x40: 426 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 427 lun[6] != 0 || lun[7] != 0) { 428 CFISCSI_WARN("malformed LUN " 429 "(flat address space addressing method): 0x%jx", 430 (uintmax_t)encoded); 431 result = 0xffffffff; 432 break; 433 } 434 result = ((lun[0] & 0x3f) << 8) + lun[1]; 435 break; 436 case 0xC0: 437 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 438 lun[6] != 0 || lun[7] != 0) { 439 CFISCSI_WARN("malformed LUN (extended flat " 440 "address space addressing method): 0x%jx", 441 (uintmax_t)encoded); 442 result = 0xffffffff; 443 break; 444 } 445 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 446 default: 447 CFISCSI_WARN("unsupported LUN format 0x%jx", 448 (uintmax_t)encoded); 449 result = 0xffffffff; 450 break; 451 } 452 453 return (result); 454} 455 456static void 457cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 458{ 459 struct cfiscsi_session *cs; 460 struct iscsi_bhs_nop_out *bhsno; 461 struct iscsi_bhs_nop_in *bhsni; 462 struct icl_pdu *response; 463 void *data = NULL; 464 size_t datasize; 465 int error; 466 467 cs = PDU_SESSION(request); 468 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 469 470 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 471 /* 472 * Nothing to do, iscsi_pdu_update_statsn() already 473 * zeroed the timeout. 474 */ 475 icl_pdu_free(request); 476 return; 477 } 478 479 datasize = icl_pdu_data_segment_length(request); 480 if (datasize > 0) { 481 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 482 if (data == NULL) { 483 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 484 "dropping connection"); 485 icl_pdu_free(request); 486 cfiscsi_session_terminate(cs); 487 return; 488 } 489 icl_pdu_get_data(request, 0, data, datasize); 490 } 491 492 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 493 if (response == NULL) { 494 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 495 "droppping connection"); 496 free(data, M_CFISCSI); 497 icl_pdu_free(request); 498 cfiscsi_session_terminate(cs); 499 return; 500 } 501 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 502 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 503 bhsni->bhsni_flags = 0x80; 504 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 505 bhsni->bhsni_target_transfer_tag = 0xffffffff; 506 if (datasize > 0) { 507 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 508 if (error != 0) { 509 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 510 "dropping connection"); 511 free(data, M_CFISCSI); 512 icl_pdu_free(request); 513 icl_pdu_free(response); 514 cfiscsi_session_terminate(cs); 515 return; 516 } 517 free(data, M_CFISCSI); 518 } 519 520 icl_pdu_free(request); 521 cfiscsi_pdu_queue(response); 522} 523 524static void 525cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 526{ 527 struct iscsi_bhs_scsi_command *bhssc; 528 struct cfiscsi_session *cs; 529 union ctl_io *io; 530 int error; 531 532 cs = PDU_SESSION(request); 533 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 534 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 535 // bhssc->bhssc_initiator_task_tag); 536 537 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 538 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 539 "ImmediateData=No; dropping connection"); 540 icl_pdu_free(request); 541 cfiscsi_session_terminate(cs); 542 return; 543 } 544 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 545 if (io == NULL) { 546 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 547 "dropping connection"); 548 icl_pdu_free(request); 549 cfiscsi_session_terminate(cs); 550 return; 551 } 552 ctl_zero_io(io); 553 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 554 io->io_hdr.io_type = CTL_IO_SCSI; 555 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 556 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 557 io->io_hdr.nexus.targ_target.id = 0; 558 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 559 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 560 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 561 case BHSSC_FLAGS_ATTR_UNTAGGED: 562 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 563 break; 564 case BHSSC_FLAGS_ATTR_SIMPLE: 565 io->scsiio.tag_type = CTL_TAG_SIMPLE; 566 break; 567 case BHSSC_FLAGS_ATTR_ORDERED: 568 io->scsiio.tag_type = CTL_TAG_ORDERED; 569 break; 570 case BHSSC_FLAGS_ATTR_HOQ: 571 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 572 break; 573 case BHSSC_FLAGS_ATTR_ACA: 574 io->scsiio.tag_type = CTL_TAG_ACA; 575 break; 576 default: 577 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 578 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 579 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 580 break; 581 } 582 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 583 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 584 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 585 error = ctl_queue(io); 586 if (error != CTL_RETVAL_COMPLETE) { 587 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 588 "dropping connection", error); 589 ctl_free_io(io); 590 refcount_release(&cs->cs_outstanding_ctl_pdus); 591 icl_pdu_free(request); 592 cfiscsi_session_terminate(cs); 593 } 594} 595 596static void 597cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 598{ 599 struct iscsi_bhs_task_management_request *bhstmr; 600 struct iscsi_bhs_task_management_response *bhstmr2; 601 struct icl_pdu *response; 602 struct cfiscsi_session *cs; 603 union ctl_io *io; 604 int error; 605 606 cs = PDU_SESSION(request); 607 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 608 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 609 if (io == NULL) { 610 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 611 "dropping connection"); 612 icl_pdu_free(request); 613 cfiscsi_session_terminate(cs); 614 return; 615 } 616 ctl_zero_io(io); 617 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 618 io->io_hdr.io_type = CTL_IO_TASK; 619 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 620 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 621 io->io_hdr.nexus.targ_target.id = 0; 622 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 623 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 624 625 switch (bhstmr->bhstmr_function & ~0x80) { 626 case BHSTMR_FUNCTION_ABORT_TASK: 627#if 0 628 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 629#endif 630 io->taskio.task_action = CTL_TASK_ABORT_TASK; 631 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 632 break; 633 case BHSTMR_FUNCTION_ABORT_TASK_SET: 634#if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 636#endif 637 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 638 break; 639 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 640#if 0 641 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 642#endif 643 io->taskio.task_action = CTL_TASK_LUN_RESET; 644 break; 645 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 646#if 0 647 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 648#endif 649 io->taskio.task_action = CTL_TASK_TARGET_RESET; 650 break; 651 default: 652 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 653 bhstmr->bhstmr_function & ~0x80); 654 ctl_free_io(io); 655 656 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 657 if (response == NULL) { 658 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 659 "dropping connection"); 660 icl_pdu_free(request); 661 cfiscsi_session_terminate(cs); 662 return; 663 } 664 bhstmr2 = (struct iscsi_bhs_task_management_response *) 665 response->ip_bhs; 666 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 667 bhstmr2->bhstmr_flags = 0x80; 668 bhstmr2->bhstmr_response = 669 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 670 bhstmr2->bhstmr_initiator_task_tag = 671 bhstmr->bhstmr_initiator_task_tag; 672 icl_pdu_free(request); 673 cfiscsi_pdu_queue(response); 674 return; 675 } 676 677 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 678 error = ctl_queue(io); 679 if (error != CTL_RETVAL_COMPLETE) { 680 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 681 "dropping connection", error); 682 ctl_free_io(io); 683 refcount_release(&cs->cs_outstanding_ctl_pdus); 684 icl_pdu_free(request); 685 cfiscsi_session_terminate(cs); 686 } 687} 688 689static bool 690cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 691{ 692 struct iscsi_bhs_data_out *bhsdo; 693 struct cfiscsi_session *cs; 694 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 695 size_t copy_len, len, off, buffer_offset; 696 int ctl_sg_count; 697 union ctl_io *io; 698 699 cs = PDU_SESSION(request); 700 701 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 702 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 703 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 704 ISCSI_BHS_OPCODE_SCSI_COMMAND, 705 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 706 707 /* 708 * We're only using fields common for Data-Out and SCSI Command PDUs. 709 */ 710 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 711 712 io = cdw->cdw_ctl_io; 713 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 714 ("CTL_FLAG_DATA_IN")); 715 716#if 0 717 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 718 request->ip_data_len, io->scsiio.kern_total_len); 719#endif 720 721 if (io->scsiio.kern_sg_entries > 0) { 722 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 723 ctl_sg_count = io->scsiio.kern_sg_entries; 724 } else { 725 ctl_sglist = &ctl_sg_entry; 726 ctl_sglist->addr = io->scsiio.kern_data_ptr; 727 ctl_sglist->len = io->scsiio.kern_data_len; 728 ctl_sg_count = 1; 729 } 730 731 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 732 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 733 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 734 else 735 buffer_offset = 0; 736 len = icl_pdu_data_segment_length(request); 737 738 /* 739 * Make sure the offset, as sent by the initiator, matches the offset 740 * we're supposed to be at in the scatter-gather list. 741 */ 742 if (buffer_offset > 743 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 744 buffer_offset + len <= 745 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 746 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 747 "expected %zd; dropping connection", buffer_offset, 748 (size_t)io->scsiio.kern_rel_offset + 749 (size_t)io->scsiio.ext_data_filled); 750 ctl_set_data_phase_error(&io->scsiio); 751 cfiscsi_session_terminate(cs); 752 return (true); 753 } 754 755 /* 756 * This is the offset within the PDU data segment, as opposed 757 * to buffer_offset, which is the offset within the task (SCSI 758 * command). 759 */ 760 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 761 buffer_offset; 762 763 /* 764 * Iterate over the scatter/gather segments, filling them with data 765 * from the PDU data segment. Note that this can get called multiple 766 * times for one SCSI command; the cdw structure holds state for the 767 * scatter/gather list. 768 */ 769 for (;;) { 770 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 771 ("cdw->cdw_sg_index >= ctl_sg_count")); 772 if (cdw->cdw_sg_len == 0) { 773 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 774 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 775 } 776 KASSERT(off <= len, ("len > off")); 777 copy_len = len - off; 778 if (copy_len > cdw->cdw_sg_len) 779 copy_len = cdw->cdw_sg_len; 780 781 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 782 cdw->cdw_sg_addr += copy_len; 783 cdw->cdw_sg_len -= copy_len; 784 off += copy_len; 785 io->scsiio.ext_data_filled += copy_len; 786 787 if (cdw->cdw_sg_len == 0) { 788 /* 789 * End of current segment. 790 */ 791 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 792 /* 793 * Last segment in scatter/gather list. 794 */ 795 break; 796 } 797 cdw->cdw_sg_index++; 798 } 799 800 if (off == len) { 801 /* 802 * End of PDU payload. 803 */ 804 break; 805 } 806 } 807 808 if (len > off) { 809 /* 810 * In case of unsolicited data, it's possible that the buffer 811 * provided by CTL is smaller than negotiated FirstBurstLength. 812 * Just ignore the superfluous data; will ask for them with R2T 813 * on next call to cfiscsi_datamove(). 814 * 815 * This obviously can only happen with SCSI Command PDU. 816 */ 817 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 818 ISCSI_BHS_OPCODE_SCSI_COMMAND) 819 return (true); 820 821 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 822 "expected %zd; dropping connection", 823 icl_pdu_data_segment_length(request), off); 824 ctl_set_data_phase_error(&io->scsiio); 825 cfiscsi_session_terminate(cs); 826 return (true); 827 } 828 829 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 830 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 831 CFISCSI_SESSION_WARN(cs, "got the final packet without " 832 "the F flag; flags = 0x%x; dropping connection", 833 bhsdo->bhsdo_flags); 834 ctl_set_data_phase_error(&io->scsiio); 835 cfiscsi_session_terminate(cs); 836 return (true); 837 } 838 839 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 840 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 841 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 842 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 843 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 844 "transmitted size was %zd bytes instead of %d; " 845 "dropping connection", 846 (size_t)io->scsiio.ext_data_filled, 847 cdw->cdw_r2t_end); 848 ctl_set_data_phase_error(&io->scsiio); 849 cfiscsi_session_terminate(cs); 850 return (true); 851 } else { 852 /* 853 * For SCSI Command PDU, this just means we need to 854 * solicit more data by sending R2T. 855 */ 856 return (false); 857 } 858 } 859 860 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 861#if 0 862 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 863 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 864#endif 865 866 return (true); 867 } 868 869 return (false); 870} 871 872static void 873cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 874{ 875 struct iscsi_bhs_data_out *bhsdo; 876 struct cfiscsi_session *cs; 877 struct cfiscsi_data_wait *cdw = NULL; 878 union ctl_io *io; 879 bool done; 880 881 cs = PDU_SESSION(request); 882 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 883 884 CFISCSI_SESSION_LOCK(cs); 885 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 886#if 0 887 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 888 "ttt 0x%x, itt 0x%x", 889 bhsdo->bhsdo_target_transfer_tag, 890 bhsdo->bhsdo_initiator_task_tag, 891 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 892#endif 893 if (bhsdo->bhsdo_target_transfer_tag == 894 cdw->cdw_target_transfer_tag) 895 break; 896 } 897 CFISCSI_SESSION_UNLOCK(cs); 898 if (cdw == NULL) { 899 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 900 "0x%x, not found; dropping connection", 901 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 902 icl_pdu_free(request); 903 cfiscsi_session_terminate(cs); 904 return; 905 } 906 907 io = cdw->cdw_ctl_io; 908 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 909 ("CTL_FLAG_DATA_IN")); 910 911 done = cfiscsi_handle_data_segment(request, cdw); 912 if (done) { 913 CFISCSI_SESSION_LOCK(cs); 914 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 915 CFISCSI_SESSION_UNLOCK(cs); 916 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 917 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 918 uma_zfree(cfiscsi_data_wait_zone, cdw); 919 if (done) 920 io->scsiio.be_move_done(io); 921 else 922 cfiscsi_datamove_out(io); 923 } 924 925 icl_pdu_free(request); 926} 927 928static void 929cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930{ 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983} 984 985static void 986cfiscsi_callout(void *context) 987{ 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001#ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010#endif 1011 1012 if (ping_timeout <= 0) { 1013 /* 1014 * Pings are disabled. Don't send NOP-In in this case; 1015 * user might have disabled pings to work around problems 1016 * with certain initiators that can't properly handle 1017 * NOP-In, such as iPXE. Reset the timeout, to avoid 1018 * triggering reconnection, should the user decide to 1019 * reenable them. 1020 */ 1021 cs->cs_timeout = 0; 1022 return; 1023 } 1024 1025 if (cs->cs_timeout >= ping_timeout) { 1026 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1027 "dropping connection", ping_timeout); 1028 cfiscsi_session_terminate(cs); 1029 return; 1030 } 1031 1032 /* 1033 * If the ping was reset less than one second ago - which means 1034 * that we've received some PDU during the last second - assume 1035 * the traffic flows correctly and don't bother sending a NOP-Out. 1036 * 1037 * (It's 2 - one for one second, and one for incrementing is_timeout 1038 * earlier in this routine.) 1039 */ 1040 if (cs->cs_timeout < 2) 1041 return; 1042 1043 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1044 if (cp == NULL) { 1045 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1046 return; 1047 } 1048 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1049 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1050 bhsni->bhsni_flags = 0x80; 1051 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1052 1053 cfiscsi_pdu_queue(cp); 1054} 1055 1056static void 1057cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1058{ 1059 struct cfiscsi_data_wait *cdw; 1060 union ctl_io *io; 1061 int error, last; 1062 1063 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1064 if (io == NULL) { 1065 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1066 return; 1067 } 1068 ctl_zero_io(io); 1069 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1070 io->io_hdr.io_type = CTL_IO_TASK; 1071 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1072 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1073 io->io_hdr.nexus.targ_target.id = 0; 1074 io->io_hdr.nexus.targ_lun = 0; 1075 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1076 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1077 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1078 error = ctl_queue(io); 1079 if (error != CTL_RETVAL_COMPLETE) { 1080 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1081 refcount_release(&cs->cs_outstanding_ctl_pdus); 1082 ctl_free_io(io); 1083 } 1084 1085 CFISCSI_SESSION_LOCK(cs); 1086 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1087 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1088 CFISCSI_SESSION_UNLOCK(cs); 1089 /* 1090 * Set nonzero port status; this prevents backends from 1091 * assuming that the data transfer actually succeeded 1092 * and writing uninitialized data to disk. 1093 */ 1094 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1095 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1096 uma_zfree(cfiscsi_data_wait_zone, cdw); 1097 CFISCSI_SESSION_LOCK(cs); 1098 } 1099 CFISCSI_SESSION_UNLOCK(cs); 1100 1101 /* 1102 * Wait for CTL to terminate all the tasks. 1103 */ 1104 for (;;) { 1105 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1106 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1107 if (last != 0) 1108 break; 1109 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1110 "%d remaining", cs->cs_outstanding_ctl_pdus); 1111 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1112 0, "cfiscsi_terminate", hz / 100); 1113 } 1114} 1115 1116static void 1117cfiscsi_maintenance_thread(void *arg) 1118{ 1119 struct cfiscsi_session *cs; 1120 1121 cs = arg; 1122 1123 for (;;) { 1124 CFISCSI_SESSION_LOCK(cs); 1125 if (cs->cs_terminating == false) 1126 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1127 CFISCSI_SESSION_UNLOCK(cs); 1128 1129 if (cs->cs_terminating) { 1130 1131 /* 1132 * We used to wait up to 30 seconds to deliver queued 1133 * PDUs to the initiator. We also tried hard to deliver 1134 * SCSI Responses for the aborted PDUs. We don't do 1135 * that anymore. We might need to revisit that. 1136 */ 1137 callout_drain(&cs->cs_callout); 1138 icl_conn_shutdown(cs->cs_conn); 1139 icl_conn_close(cs->cs_conn); 1140 1141 /* 1142 * At this point ICL receive thread is no longer 1143 * running; no new tasks can be queued. 1144 */ 1145 cfiscsi_session_terminate_tasks(cs); 1146 cfiscsi_session_delete(cs); 1147 kthread_exit(); 1148 return; 1149 } 1150 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1151 } 1152} 1153 1154static void 1155cfiscsi_session_terminate(struct cfiscsi_session *cs) 1156{ 1157 1158 if (cs->cs_terminating) 1159 return; 1160 cs->cs_terminating = true; 1161 cv_signal(&cs->cs_maintenance_cv); 1162#ifdef ICL_KERNEL_PROXY 1163 cv_signal(&cs->cs_login_cv); 1164#endif 1165} 1166 1167static int 1168cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1169{ 1170 struct cfiscsi_target *ct; 1171 char *name; 1172 int i; 1173 1174 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1175 1176 ct = cs->cs_target; 1177 name = strdup(cs->cs_initiator_id, M_CTL); 1178 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1179 if (i < 0) { 1180 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1181 i); 1182 cs->cs_ctl_initid = -1; 1183 return (1); 1184 } 1185 cs->cs_ctl_initid = i; 1186#if 0 1187 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1188#endif 1189 1190 return (0); 1191} 1192 1193static void 1194cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1195{ 1196 int error; 1197 1198 if (cs->cs_ctl_initid == -1) 1199 return; 1200 1201 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1202 if (error != 0) { 1203 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1204 error); 1205 } 1206 cs->cs_ctl_initid = -1; 1207} 1208 1209static struct cfiscsi_session * 1210cfiscsi_session_new(struct cfiscsi_softc *softc) 1211{ 1212 struct cfiscsi_session *cs; 1213 int error; 1214 1215 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1216 if (cs == NULL) { 1217 CFISCSI_WARN("malloc failed"); 1218 return (NULL); 1219 } 1220 cs->cs_ctl_initid = -1; 1221 1222 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1223 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1224 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1225 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1226#ifdef ICL_KERNEL_PROXY 1227 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1228#endif 1229 1230 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1231 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1232 cs->cs_conn->ic_error = cfiscsi_error_callback; 1233 cs->cs_conn->ic_prv0 = cs; 1234 1235 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1236 if (error != 0) { 1237 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1238 free(cs, M_CFISCSI); 1239 return (NULL); 1240 } 1241 1242 mtx_lock(&softc->lock); 1243 cs->cs_id = softc->last_session_id + 1; 1244 softc->last_session_id++; 1245 mtx_unlock(&softc->lock); 1246 1247 mtx_lock(&softc->lock); 1248 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1249 mtx_unlock(&softc->lock); 1250 1251 /* 1252 * Start pinging the initiator. 1253 */ 1254 callout_init(&cs->cs_callout, 1); 1255 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1256 1257 return (cs); 1258} 1259 1260static void 1261cfiscsi_session_delete(struct cfiscsi_session *cs) 1262{ 1263 struct cfiscsi_softc *softc; 1264 1265 softc = &cfiscsi_softc; 1266 1267 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1268 ("destroying session with outstanding CTL pdus")); 1269 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1270 ("destroying session with non-empty queue")); 1271 1272 cfiscsi_session_unregister_initiator(cs); 1273 if (cs->cs_target != NULL) 1274 cfiscsi_target_release(cs->cs_target); 1275 icl_conn_close(cs->cs_conn); 1276 icl_conn_free(cs->cs_conn); 1277 1278 mtx_lock(&softc->lock); 1279 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1280 mtx_unlock(&softc->lock); 1281 1282 free(cs, M_CFISCSI); 1283} 1284 1285int 1286cfiscsi_init(void) 1287{ 1288 struct cfiscsi_softc *softc; 1289 int retval; 1290 1291 softc = &cfiscsi_softc; 1292 retval = 0; 1293 bzero(softc, sizeof(*softc)); 1294 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1295 1296#ifdef ICL_KERNEL_PROXY 1297 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1298#endif 1299 TAILQ_INIT(&softc->sessions); 1300 TAILQ_INIT(&softc->targets); 1301 1302 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1303 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1304 UMA_ALIGN_PTR, 0); 1305 1306 return (0); 1307} 1308 1309#ifdef ICL_KERNEL_PROXY 1310static void 1311cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1312{ 1313 struct cfiscsi_session *cs; 1314 1315 cs = cfiscsi_session_new(&cfiscsi_softc); 1316 if (cs == NULL) { 1317 CFISCSI_WARN("failed to create session"); 1318 return; 1319 } 1320 1321 icl_conn_handoff_sock(cs->cs_conn, so); 1322 cs->cs_initiator_sa = sa; 1323 cs->cs_portal_id = portal_id; 1324 cs->cs_waiting_for_ctld = true; 1325 cv_signal(&cfiscsi_softc.accept_cv); 1326} 1327#endif 1328 1329static void 1330cfiscsi_online(void *arg) 1331{ 1332 struct cfiscsi_softc *softc; 1333 struct cfiscsi_target *ct; 1334 int online; 1335 1336 ct = (struct cfiscsi_target *)arg; 1337 softc = ct->ct_softc; 1338 1339 mtx_lock(&softc->lock); 1340 if (ct->ct_online) { 1341 mtx_unlock(&softc->lock); 1342 return; 1343 } 1344 ct->ct_online = 1; 1345 online = softc->online++; 1346 mtx_unlock(&softc->lock); 1347 if (online > 0) 1348 return; 1349 1350#ifdef ICL_KERNEL_PROXY 1351 if (softc->listener != NULL) 1352 icl_listen_free(softc->listener); 1353 softc->listener = icl_listen_new(cfiscsi_accept); 1354#endif 1355} 1356 1357static void 1358cfiscsi_offline(void *arg) 1359{ 1360 struct cfiscsi_softc *softc; 1361 struct cfiscsi_target *ct; 1362 struct cfiscsi_session *cs; 1363 int online; 1364 1365 ct = (struct cfiscsi_target *)arg; 1366 softc = ct->ct_softc; 1367 1368 mtx_lock(&softc->lock); 1369 if (!ct->ct_online) { 1370 mtx_unlock(&softc->lock); 1371 return; 1372 } 1373 ct->ct_online = 0; 1374 online = --softc->online; 1375 1376 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1377 if (cs->cs_target == ct) 1378 cfiscsi_session_terminate(cs); 1379 } 1380 mtx_unlock(&softc->lock); 1381 if (online > 0) 1382 return; 1383 1384#ifdef ICL_KERNEL_PROXY 1385 icl_listen_free(softc->listener); 1386 softc->listener = NULL; 1387#endif 1388} 1389 1390static int 1391cfiscsi_info(void *arg, struct sbuf *sb) 1392{ 1393 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1394 int retval; 1395 1396 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1397 ct->ct_state); 1398 return (retval); 1399} 1400 1401static void 1402cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1403{ 1404 struct cfiscsi_softc *softc; 1405 struct cfiscsi_session *cs, *cs2; 1406 struct cfiscsi_target *ct; 1407 struct ctl_iscsi_handoff_params *cihp; 1408 int error; 1409 1410 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1411 softc = &cfiscsi_softc; 1412 1413 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1414 cihp->initiator_name, cihp->initiator_addr, 1415 cihp->target_name); 1416 1417 ct = cfiscsi_target_find(softc, cihp->target_name); 1418 if (ct == NULL) { 1419 ci->status = CTL_ISCSI_ERROR; 1420 snprintf(ci->error_str, sizeof(ci->error_str), 1421 "%s: target not found", __func__); 1422 return; 1423 } 1424 1425 if (ct->ct_online == 0) { 1426 ci->status = CTL_ISCSI_ERROR; 1427 snprintf(ci->error_str, sizeof(ci->error_str), 1428 "%s: port offline", __func__); 1429 cfiscsi_target_release(ct); 1430 return; 1431 } 1432 1433#ifdef ICL_KERNEL_PROXY 1434 if (cihp->socket > 0 && cihp->connection_id > 0) { 1435 snprintf(ci->error_str, sizeof(ci->error_str), 1436 "both socket and connection_id set"); 1437 ci->status = CTL_ISCSI_ERROR; 1438 cfiscsi_target_release(ct); 1439 return; 1440 } 1441 if (cihp->socket == 0) { 1442 mtx_lock(&cfiscsi_softc.lock); 1443 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1444 if (cs->cs_id == cihp->socket) 1445 break; 1446 } 1447 if (cs == NULL) { 1448 mtx_unlock(&cfiscsi_softc.lock); 1449 snprintf(ci->error_str, sizeof(ci->error_str), 1450 "connection not found"); 1451 ci->status = CTL_ISCSI_ERROR; 1452 cfiscsi_target_release(ct); 1453 return; 1454 } 1455 mtx_unlock(&cfiscsi_softc.lock); 1456 } else { 1457#endif 1458 cs = cfiscsi_session_new(softc); 1459 if (cs == NULL) { 1460 ci->status = CTL_ISCSI_ERROR; 1461 snprintf(ci->error_str, sizeof(ci->error_str), 1462 "%s: cfiscsi_session_new failed", __func__); 1463 cfiscsi_target_release(ct); 1464 return; 1465 } 1466#ifdef ICL_KERNEL_PROXY 1467 } 1468#endif 1469 cs->cs_target = ct; 1470 1471 /* 1472 * First PDU of Full Feature phase has the same CmdSN as the last 1473 * PDU from the Login Phase received from the initiator. Thus, 1474 * the -1 below. 1475 */ 1476 cs->cs_portal_group_tag = cihp->portal_group_tag; 1477 cs->cs_cmdsn = cihp->cmdsn; 1478 cs->cs_statsn = cihp->statsn; 1479 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1480 cs->cs_max_burst_length = cihp->max_burst_length; 1481 cs->cs_immediate_data = !!cihp->immediate_data; 1482 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1483 cs->cs_conn->ic_header_crc32c = true; 1484 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1485 cs->cs_conn->ic_data_crc32c = true; 1486 1487 strlcpy(cs->cs_initiator_name, 1488 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1489 strlcpy(cs->cs_initiator_addr, 1490 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1491 strlcpy(cs->cs_initiator_alias, 1492 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1493 memcpy(cs->cs_initiator_isid, 1494 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1495 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1496 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1497 cihp->initiator_isid[0], cihp->initiator_isid[1], 1498 cihp->initiator_isid[2], cihp->initiator_isid[3], 1499 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1500 1501 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1502restart: 1503 if (!cs->cs_terminating) { 1504 mtx_lock(&softc->lock); 1505 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1506 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1507 cs->cs_target == cs2->cs_target && 1508 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1509 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1510 cfiscsi_session_terminate(cs2); 1511 mtx_unlock(&softc->lock); 1512 pause("cfiscsi_reinstate", 1); 1513 goto restart; 1514 } 1515 } 1516 mtx_unlock(&softc->lock); 1517 } 1518 1519 /* 1520 * Register initiator with CTL. 1521 */ 1522 cfiscsi_session_register_initiator(cs); 1523 1524#ifdef ICL_KERNEL_PROXY 1525 if (cihp->socket > 0) { 1526#endif 1527 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1528 if (error != 0) { 1529 cfiscsi_session_terminate(cs); 1530 refcount_release(&cs->cs_outstanding_ctl_pdus); 1531 ci->status = CTL_ISCSI_ERROR; 1532 snprintf(ci->error_str, sizeof(ci->error_str), 1533 "%s: icl_conn_handoff failed with error %d", 1534 __func__, error); 1535 return; 1536 } 1537#ifdef ICL_KERNEL_PROXY 1538 } 1539#endif 1540 1541#ifdef ICL_KERNEL_PROXY 1542 cs->cs_login_phase = false; 1543 1544 /* 1545 * First PDU of the Full Feature phase has likely already arrived. 1546 * We have to pick it up and execute properly. 1547 */ 1548 if (cs->cs_login_pdu != NULL) { 1549 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1550 cfiscsi_pdu_handle(cs->cs_login_pdu); 1551 cs->cs_login_pdu = NULL; 1552 } 1553#endif 1554 1555 refcount_release(&cs->cs_outstanding_ctl_pdus); 1556 ci->status = CTL_ISCSI_OK; 1557} 1558 1559static void 1560cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1561{ 1562 struct ctl_iscsi_list_params *cilp; 1563 struct cfiscsi_session *cs; 1564 struct cfiscsi_softc *softc; 1565 struct sbuf *sb; 1566 int error; 1567 1568 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1569 softc = &cfiscsi_softc; 1570 1571 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1572 if (sb == NULL) { 1573 ci->status = CTL_ISCSI_ERROR; 1574 snprintf(ci->error_str, sizeof(ci->error_str), 1575 "Unable to allocate %d bytes for iSCSI session list", 1576 cilp->alloc_len); 1577 return; 1578 } 1579 1580 sbuf_printf(sb, "<ctlislist>\n"); 1581 mtx_lock(&softc->lock); 1582 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1583#ifdef ICL_KERNEL_PROXY 1584 if (cs->cs_target == NULL) 1585 continue; 1586#endif 1587 error = sbuf_printf(sb, "<connection id=\"%d\">" 1588 "<initiator>%s</initiator>" 1589 "<initiator_addr>%s</initiator_addr>" 1590 "<initiator_alias>%s</initiator_alias>" 1591 "<target>%s</target>" 1592 "<target_alias>%s</target_alias>" 1593 "<header_digest>%s</header_digest>" 1594 "<data_digest>%s</data_digest>" 1595 "<max_data_segment_length>%zd</max_data_segment_length>" 1596 "<immediate_data>%d</immediate_data>" 1597 "<iser>%d</iser>" 1598 "</connection>\n", 1599 cs->cs_id, 1600 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1601 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1602 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1603 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1604 cs->cs_max_data_segment_length, 1605 cs->cs_immediate_data, 1606 cs->cs_conn->ic_iser); 1607 if (error != 0) 1608 break; 1609 } 1610 mtx_unlock(&softc->lock); 1611 error = sbuf_printf(sb, "</ctlislist>\n"); 1612 if (error != 0) { 1613 sbuf_delete(sb); 1614 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1615 snprintf(ci->error_str, sizeof(ci->error_str), 1616 "Out of space, %d bytes is too small", cilp->alloc_len); 1617 return; 1618 } 1619 sbuf_finish(sb); 1620 1621 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1622 cilp->fill_len = sbuf_len(sb) + 1; 1623 ci->status = CTL_ISCSI_OK; 1624 sbuf_delete(sb); 1625} 1626 1627static void 1628cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1629{ 1630 struct icl_pdu *response; 1631 struct iscsi_bhs_asynchronous_message *bhsam; 1632 struct ctl_iscsi_terminate_params *citp; 1633 struct cfiscsi_session *cs; 1634 struct cfiscsi_softc *softc; 1635 int found = 0; 1636 1637 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1638 softc = &cfiscsi_softc; 1639 1640 mtx_lock(&softc->lock); 1641 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1642 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1643 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1644 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1645 continue; 1646 1647 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1648 if (response == NULL) { 1649 /* 1650 * Oh well. Just terminate the connection. 1651 */ 1652 } else { 1653 bhsam = (struct iscsi_bhs_asynchronous_message *) 1654 response->ip_bhs; 1655 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1656 bhsam->bhsam_flags = 0x80; 1657 bhsam->bhsam_0xffffffff = 0xffffffff; 1658 bhsam->bhsam_async_event = 1659 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1660 cfiscsi_pdu_queue(response); 1661 } 1662 cfiscsi_session_terminate(cs); 1663 found++; 1664 } 1665 mtx_unlock(&softc->lock); 1666 1667 if (found == 0) { 1668 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1669 snprintf(ci->error_str, sizeof(ci->error_str), 1670 "No matching connections found"); 1671 return; 1672 } 1673 1674 ci->status = CTL_ISCSI_OK; 1675} 1676 1677static void 1678cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1679{ 1680 struct icl_pdu *response; 1681 struct iscsi_bhs_asynchronous_message *bhsam; 1682 struct ctl_iscsi_logout_params *cilp; 1683 struct cfiscsi_session *cs; 1684 struct cfiscsi_softc *softc; 1685 int found = 0; 1686 1687 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1688 softc = &cfiscsi_softc; 1689 1690 mtx_lock(&softc->lock); 1691 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1692 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1693 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1694 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1695 continue; 1696 1697 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1698 if (response == NULL) { 1699 ci->status = CTL_ISCSI_ERROR; 1700 snprintf(ci->error_str, sizeof(ci->error_str), 1701 "Unable to allocate memory"); 1702 mtx_unlock(&softc->lock); 1703 return; 1704 } 1705 bhsam = 1706 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1707 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1708 bhsam->bhsam_flags = 0x80; 1709 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1710 bhsam->bhsam_parameter3 = htons(10); 1711 cfiscsi_pdu_queue(response); 1712 found++; 1713 } 1714 mtx_unlock(&softc->lock); 1715 1716 if (found == 0) { 1717 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1718 snprintf(ci->error_str, sizeof(ci->error_str), 1719 "No matching connections found"); 1720 return; 1721 } 1722 1723 ci->status = CTL_ISCSI_OK; 1724} 1725 1726#ifdef ICL_KERNEL_PROXY 1727static void 1728cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1729{ 1730 struct ctl_iscsi_listen_params *cilp; 1731 struct sockaddr *sa; 1732 int error; 1733 1734 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1735 1736 if (cfiscsi_softc.listener == NULL) { 1737 CFISCSI_DEBUG("no listener"); 1738 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1739 ci->status = CTL_ISCSI_ERROR; 1740 return; 1741 } 1742 1743 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1744 if (error != 0) { 1745 CFISCSI_DEBUG("getsockaddr, error %d", error); 1746 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1747 ci->status = CTL_ISCSI_ERROR; 1748 return; 1749 } 1750 1751 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1752 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1753 if (error != 0) { 1754 free(sa, M_SONAME); 1755 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1756 snprintf(ci->error_str, sizeof(ci->error_str), 1757 "icl_listen_add failed, error %d", error); 1758 ci->status = CTL_ISCSI_ERROR; 1759 return; 1760 } 1761 1762 ci->status = CTL_ISCSI_OK; 1763} 1764 1765static void 1766cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1767{ 1768 struct ctl_iscsi_accept_params *ciap; 1769 struct cfiscsi_session *cs; 1770 int error; 1771 1772 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1773 1774 mtx_lock(&cfiscsi_softc.lock); 1775 for (;;) { 1776 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1777 if (cs->cs_waiting_for_ctld) 1778 break; 1779 } 1780 if (cs != NULL) 1781 break; 1782 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1783 if (error != 0) { 1784 mtx_unlock(&cfiscsi_softc.lock); 1785 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1786 ci->status = CTL_ISCSI_ERROR; 1787 return; 1788 } 1789 } 1790 mtx_unlock(&cfiscsi_softc.lock); 1791 1792 cs->cs_waiting_for_ctld = false; 1793 cs->cs_login_phase = true; 1794 1795 ciap->connection_id = cs->cs_id; 1796 ciap->portal_id = cs->cs_portal_id; 1797 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1798 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1799 cs->cs_initiator_sa->sa_len); 1800 if (error != 0) { 1801 snprintf(ci->error_str, sizeof(ci->error_str), 1802 "copyout failed with error %d", error); 1803 ci->status = CTL_ISCSI_ERROR; 1804 return; 1805 } 1806 1807 ci->status = CTL_ISCSI_OK; 1808} 1809 1810static void 1811cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1812{ 1813 struct ctl_iscsi_send_params *cisp; 1814 struct cfiscsi_session *cs; 1815 struct icl_pdu *ip; 1816 size_t datalen; 1817 void *data; 1818 int error; 1819 1820 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1821 1822 mtx_lock(&cfiscsi_softc.lock); 1823 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1824 if (cs->cs_id == cisp->connection_id) 1825 break; 1826 } 1827 if (cs == NULL) { 1828 mtx_unlock(&cfiscsi_softc.lock); 1829 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1830 ci->status = CTL_ISCSI_ERROR; 1831 return; 1832 } 1833 mtx_unlock(&cfiscsi_softc.lock); 1834 1835#if 0 1836 if (cs->cs_login_phase == false) 1837 return (EBUSY); 1838#endif 1839 1840 if (cs->cs_terminating) { 1841 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1842 ci->status = CTL_ISCSI_ERROR; 1843 return; 1844 } 1845 1846 datalen = cisp->data_segment_len; 1847 /* 1848 * XXX 1849 */ 1850 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1851 if (datalen > 65535) { 1852 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1853 ci->status = CTL_ISCSI_ERROR; 1854 return; 1855 } 1856 if (datalen > 0) { 1857 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1858 error = copyin(cisp->data_segment, data, datalen); 1859 if (error != 0) { 1860 free(data, M_CFISCSI); 1861 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1862 ci->status = CTL_ISCSI_ERROR; 1863 return; 1864 } 1865 } 1866 1867 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1868 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1869 if (datalen > 0) { 1870 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1871 free(data, M_CFISCSI); 1872 } 1873 CFISCSI_SESSION_LOCK(cs); 1874 icl_pdu_queue(ip); 1875 CFISCSI_SESSION_UNLOCK(cs); 1876 ci->status = CTL_ISCSI_OK; 1877} 1878 1879static void 1880cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1881{ 1882 struct ctl_iscsi_receive_params *cirp; 1883 struct cfiscsi_session *cs; 1884 struct icl_pdu *ip; 1885 void *data; 1886 int error; 1887 1888 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1889 1890 mtx_lock(&cfiscsi_softc.lock); 1891 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1892 if (cs->cs_id == cirp->connection_id) 1893 break; 1894 } 1895 if (cs == NULL) { 1896 mtx_unlock(&cfiscsi_softc.lock); 1897 snprintf(ci->error_str, sizeof(ci->error_str), 1898 "connection not found"); 1899 ci->status = CTL_ISCSI_ERROR; 1900 return; 1901 } 1902 mtx_unlock(&cfiscsi_softc.lock); 1903 1904#if 0 1905 if (is->is_login_phase == false) 1906 return (EBUSY); 1907#endif 1908 1909 CFISCSI_SESSION_LOCK(cs); 1910 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1911 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1912 if (error != 0) { 1913 CFISCSI_SESSION_UNLOCK(cs); 1914 snprintf(ci->error_str, sizeof(ci->error_str), 1915 "interrupted by signal"); 1916 ci->status = CTL_ISCSI_ERROR; 1917 return; 1918 } 1919 } 1920 1921 if (cs->cs_terminating) { 1922 CFISCSI_SESSION_UNLOCK(cs); 1923 snprintf(ci->error_str, sizeof(ci->error_str), 1924 "connection terminating"); 1925 ci->status = CTL_ISCSI_ERROR; 1926 return; 1927 } 1928 ip = cs->cs_login_pdu; 1929 cs->cs_login_pdu = NULL; 1930 CFISCSI_SESSION_UNLOCK(cs); 1931 1932 if (ip->ip_data_len > cirp->data_segment_len) { 1933 icl_pdu_free(ip); 1934 snprintf(ci->error_str, sizeof(ci->error_str), 1935 "data segment too big"); 1936 ci->status = CTL_ISCSI_ERROR; 1937 return; 1938 } 1939 1940 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1941 if (ip->ip_data_len > 0) { 1942 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1943 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1944 copyout(data, cirp->data_segment, ip->ip_data_len); 1945 free(data, M_CFISCSI); 1946 } 1947 1948 icl_pdu_free(ip); 1949 ci->status = CTL_ISCSI_OK; 1950} 1951 1952#endif /* !ICL_KERNEL_PROXY */ 1953 1954static void 1955cfiscsi_ioctl_port_create(struct ctl_req *req) 1956{ 1957 struct cfiscsi_target *ct; 1958 struct ctl_port *port; 1959 const char *target, *alias, *tag; 1960 struct scsi_vpd_id_descriptor *desc; 1961 ctl_options_t opts; 1962 int retval, len, idlen; 1963 1964 ctl_init_opts(&opts, req->num_args, req->kern_args); 1965 target = ctl_get_opt(&opts, "cfiscsi_target"); 1966 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1967 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1968 if (target == NULL || tag == NULL) { 1969 req->status = CTL_LUN_ERROR; 1970 snprintf(req->error_str, sizeof(req->error_str), 1971 "Missing required argument"); 1972 ctl_free_opts(&opts); 1973 return; 1974 } 1975 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1976 if (ct == NULL) { 1977 req->status = CTL_LUN_ERROR; 1978 snprintf(req->error_str, sizeof(req->error_str), 1979 "failed to create target \"%s\"", target); 1980 ctl_free_opts(&opts); 1981 return; 1982 } 1983 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1984 req->status = CTL_LUN_ERROR; 1985 snprintf(req->error_str, sizeof(req->error_str), 1986 "target \"%s\" already exist", target); 1987 cfiscsi_target_release(ct); 1988 ctl_free_opts(&opts); 1989 return; 1990 } 1991 port = &ct->ct_port; 1992 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1993 goto done; 1994 1995 port->frontend = &cfiscsi_frontend; 1996 port->port_type = CTL_PORT_ISCSI; 1997 /* XXX KDM what should the real number be here? */ 1998 port->num_requested_ctl_io = 4096; 1999 port->port_name = "iscsi"; 2000 port->virtual_port = strtoul(tag, NULL, 0); 2001 port->port_online = cfiscsi_online; 2002 port->port_offline = cfiscsi_offline; 2003 port->port_info = cfiscsi_info; 2004 port->onoff_arg = ct; 2005 port->lun_enable = cfiscsi_lun_enable; 2006 port->lun_disable = cfiscsi_lun_disable; 2007 port->lun_map = cfiscsi_lun_map; 2008 port->targ_lun_arg = ct; 2009 port->fe_datamove = cfiscsi_datamove; 2010 port->fe_done = cfiscsi_done; 2011 2012 /* XXX KDM what should we report here? */ 2013 /* XXX These should probably be fetched from CTL. */ 2014 port->max_targets = 1; 2015 port->max_target_id = 15; 2016 2017 port->options = opts; 2018 STAILQ_INIT(&opts); 2019 2020 /* Generate Port ID. */ 2021 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2022 idlen = roundup2(idlen, 4); 2023 len = sizeof(struct scsi_vpd_device_id) + idlen; 2024 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2025 M_CTL, M_WAITOK | M_ZERO); 2026 port->port_devid->len = len; 2027 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2028 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2029 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2030 SVPD_ID_TYPE_SCSI_NAME; 2031 desc->length = idlen; 2032 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2033 target, port->virtual_port); 2034 2035 /* Generate Target ID. */ 2036 idlen = strlen(target) + 1; 2037 idlen = roundup2(idlen, 4); 2038 len = sizeof(struct scsi_vpd_device_id) + idlen; 2039 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2040 M_CTL, M_WAITOK | M_ZERO); 2041 port->target_devid->len = len; 2042 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2043 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2044 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2045 SVPD_ID_TYPE_SCSI_NAME; 2046 desc->length = idlen; 2047 strlcpy(desc->identifier, target, idlen); 2048 2049 retval = ctl_port_register(port, /*master_SC*/ 1); 2050 if (retval != 0) { 2051 ctl_free_opts(&port->options); 2052 cfiscsi_target_release(ct); 2053 free(port->port_devid, M_CFISCSI); 2054 free(port->target_devid, M_CFISCSI); 2055 req->status = CTL_LUN_ERROR; 2056 snprintf(req->error_str, sizeof(req->error_str), 2057 "ctl_frontend_register() failed with error %d", retval); 2058 return; 2059 } 2060done: 2061 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2062 req->status = CTL_LUN_OK; 2063 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2064 sizeof(port->targ_port)); //XXX 2065} 2066 2067static void 2068cfiscsi_ioctl_port_remove(struct ctl_req *req) 2069{ 2070 struct cfiscsi_target *ct; 2071 const char *target; 2072 ctl_options_t opts; 2073 2074 ctl_init_opts(&opts, req->num_args, req->kern_args); 2075 target = ctl_get_opt(&opts, "cfiscsi_target"); 2076 if (target == NULL) { 2077 ctl_free_opts(&opts); 2078 req->status = CTL_LUN_ERROR; 2079 snprintf(req->error_str, sizeof(req->error_str), 2080 "Missing required argument"); 2081 return; 2082 } 2083 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2084 if (ct == NULL) { 2085 ctl_free_opts(&opts); 2086 req->status = CTL_LUN_ERROR; 2087 snprintf(req->error_str, sizeof(req->error_str), 2088 "can't find target \"%s\"", target); 2089 return; 2090 } 2091 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2092 ctl_free_opts(&opts); 2093 req->status = CTL_LUN_ERROR; 2094 snprintf(req->error_str, sizeof(req->error_str), 2095 "target \"%s\" is already dying", target); 2096 return; 2097 } 2098 ctl_free_opts(&opts); 2099 2100 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2101 ctl_port_offline(&ct->ct_port); 2102 cfiscsi_target_release(ct); 2103 cfiscsi_target_release(ct); 2104} 2105 2106static int 2107cfiscsi_ioctl(struct cdev *dev, 2108 u_long cmd, caddr_t addr, int flag, struct thread *td) 2109{ 2110 struct ctl_iscsi *ci; 2111 struct ctl_req *req; 2112 2113 if (cmd == CTL_PORT_REQ) { 2114 req = (struct ctl_req *)addr; 2115 switch (req->reqtype) { 2116 case CTL_REQ_CREATE: 2117 cfiscsi_ioctl_port_create(req); 2118 break; 2119 case CTL_REQ_REMOVE: 2120 cfiscsi_ioctl_port_remove(req); 2121 break; 2122 default: 2123 req->status = CTL_LUN_ERROR; 2124 snprintf(req->error_str, sizeof(req->error_str), 2125 "Unsupported request type %d", req->reqtype); 2126 } 2127 return (0); 2128 } 2129 2130 if (cmd != CTL_ISCSI) 2131 return (ENOTTY); 2132 2133 ci = (struct ctl_iscsi *)addr; 2134 switch (ci->type) { 2135 case CTL_ISCSI_HANDOFF: 2136 cfiscsi_ioctl_handoff(ci); 2137 break; 2138 case CTL_ISCSI_LIST: 2139 cfiscsi_ioctl_list(ci); 2140 break; 2141 case CTL_ISCSI_TERMINATE: 2142 cfiscsi_ioctl_terminate(ci); 2143 break; 2144 case CTL_ISCSI_LOGOUT: 2145 cfiscsi_ioctl_logout(ci); 2146 break; 2147#ifdef ICL_KERNEL_PROXY 2148 case CTL_ISCSI_LISTEN: 2149 cfiscsi_ioctl_listen(ci); 2150 break; 2151 case CTL_ISCSI_ACCEPT: 2152 cfiscsi_ioctl_accept(ci); 2153 break; 2154 case CTL_ISCSI_SEND: 2155 cfiscsi_ioctl_send(ci); 2156 break; 2157 case CTL_ISCSI_RECEIVE: 2158 cfiscsi_ioctl_receive(ci); 2159 break; 2160#else 2161 case CTL_ISCSI_LISTEN: 2162 case CTL_ISCSI_ACCEPT: 2163 case CTL_ISCSI_SEND: 2164 case CTL_ISCSI_RECEIVE: 2165 ci->status = CTL_ISCSI_ERROR; 2166 snprintf(ci->error_str, sizeof(ci->error_str), 2167 "%s: CTL compiled without ICL_KERNEL_PROXY", 2168 __func__); 2169 break; 2170#endif /* !ICL_KERNEL_PROXY */ 2171 default: 2172 ci->status = CTL_ISCSI_ERROR; 2173 snprintf(ci->error_str, sizeof(ci->error_str), 2174 "%s: invalid iSCSI request type %d", __func__, ci->type); 2175 break; 2176 } 2177 2178 return (0); 2179} 2180 2181static void 2182cfiscsi_target_hold(struct cfiscsi_target *ct) 2183{ 2184 2185 refcount_acquire(&ct->ct_refcount); 2186} 2187 2188static void 2189cfiscsi_target_release(struct cfiscsi_target *ct) 2190{ 2191 struct cfiscsi_softc *softc; 2192 2193 softc = ct->ct_softc; 2194 mtx_lock(&softc->lock); 2195 if (refcount_release(&ct->ct_refcount)) { 2196 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2197 mtx_unlock(&softc->lock); 2198 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2199 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2200 if (ctl_port_deregister(&ct->ct_port) != 0) 2201 printf("%s: ctl_port_deregister() failed\n", 2202 __func__); 2203 } 2204 free(ct, M_CFISCSI); 2205 2206 return; 2207 } 2208 mtx_unlock(&softc->lock); 2209} 2210 2211static struct cfiscsi_target * 2212cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2213{ 2214 struct cfiscsi_target *ct; 2215 2216 mtx_lock(&softc->lock); 2217 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2218 if (strcmp(name, ct->ct_name) != 0 || 2219 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2220 continue; 2221 cfiscsi_target_hold(ct); 2222 mtx_unlock(&softc->lock); 2223 return (ct); 2224 } 2225 mtx_unlock(&softc->lock); 2226 2227 return (NULL); 2228} 2229 2230static struct cfiscsi_target * 2231cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2232 const char *alias) 2233{ 2234 struct cfiscsi_target *ct, *newct; 2235 int i; 2236 2237 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2238 return (NULL); 2239 2240 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2241 2242 mtx_lock(&softc->lock); 2243 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2244 if (strcmp(name, ct->ct_name) != 0 || 2245 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2246 continue; 2247 cfiscsi_target_hold(ct); 2248 mtx_unlock(&softc->lock); 2249 free(newct, M_CFISCSI); 2250 return (ct); 2251 } 2252 2253 for (i = 0; i < CTL_MAX_LUNS; i++) 2254 newct->ct_luns[i] = UINT32_MAX; 2255 2256 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2257 if (alias != NULL) 2258 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2259 refcount_init(&newct->ct_refcount, 1); 2260 newct->ct_softc = softc; 2261 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2262 mtx_unlock(&softc->lock); 2263 2264 return (newct); 2265} 2266 2267/* 2268 * Takes LUN from the target space and returns LUN from the CTL space. 2269 */ 2270static uint32_t 2271cfiscsi_lun_map(void *arg, uint32_t lun) 2272{ 2273 struct cfiscsi_target *ct = arg; 2274 2275 if (lun >= CTL_MAX_LUNS) { 2276 CFISCSI_DEBUG("requested lun number %d is higher " 2277 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2278 return (UINT32_MAX); 2279 } 2280 return (ct->ct_luns[lun]); 2281} 2282 2283static int 2284cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2285 unsigned long lun_id, unsigned long ctl_lun_id) 2286{ 2287 2288 if (lun_id >= CTL_MAX_LUNS) { 2289 CFISCSI_WARN("requested lun number %ld is higher " 2290 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2291 return (-1); 2292 } 2293 2294 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2295 /* 2296 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2297 * when the LUN is created, and a second time just before 2298 * the port is brought online; don't emit warnings 2299 * for that case. 2300 */ 2301 if (ct->ct_luns[lun_id] == ctl_lun_id) 2302 return (0); 2303 CFISCSI_WARN("lun %ld already allocated", lun_id); 2304 return (-1); 2305 } 2306 2307#if 0 2308 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2309 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2310#endif 2311 2312 ct->ct_luns[lun_id] = ctl_lun_id; 2313 2314 return (0); 2315} 2316 2317static int 2318cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2319{ 2320 struct cfiscsi_softc *softc; 2321 struct cfiscsi_target *ct; 2322 const char *target = NULL; 2323 const char *lun = NULL; 2324 unsigned long tmp; 2325 2326 ct = (struct cfiscsi_target *)arg; 2327 softc = ct->ct_softc; 2328 2329 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2330 "cfiscsi_target"); 2331 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2332 "cfiscsi_lun"); 2333 2334 if (target == NULL && lun == NULL) 2335 return (0); 2336 2337 if (target == NULL || lun == NULL) { 2338 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2339 "cfiscsi_lun, or the other way around; ignoring"); 2340 return (0); 2341 } 2342 2343 if (strcmp(target, ct->ct_name) != 0) 2344 return (0); 2345 2346 tmp = strtoul(lun, NULL, 10); 2347 cfiscsi_target_set_lun(ct, tmp, lun_id); 2348 return (0); 2349} 2350 2351static int 2352cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2353{ 2354 struct cfiscsi_softc *softc; 2355 struct cfiscsi_target *ct; 2356 int i; 2357 2358 ct = (struct cfiscsi_target *)arg; 2359 softc = ct->ct_softc; 2360 2361 mtx_lock(&softc->lock); 2362 for (i = 0; i < CTL_MAX_LUNS; i++) { 2363 if (ct->ct_luns[i] != lun_id) 2364 continue; 2365 ct->ct_luns[i] = UINT32_MAX; 2366 break; 2367 } 2368 mtx_unlock(&softc->lock); 2369 return (0); 2370} 2371 2372static void 2373cfiscsi_datamove_in(union ctl_io *io) 2374{ 2375 struct cfiscsi_session *cs; 2376 struct icl_pdu *request, *response; 2377 const struct iscsi_bhs_scsi_command *bhssc; 2378 struct iscsi_bhs_data_in *bhsdi; 2379 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2380 size_t len, expected_len, sg_len, buffer_offset; 2381 const char *sg_addr; 2382 int ctl_sg_count, error, i; 2383 2384 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2385 cs = PDU_SESSION(request); 2386 2387 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2388 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2389 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2390 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2391 2392 if (io->scsiio.kern_sg_entries > 0) { 2393 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2394 ctl_sg_count = io->scsiio.kern_sg_entries; 2395 } else { 2396 ctl_sglist = &ctl_sg_entry; 2397 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2398 ctl_sglist->len = io->scsiio.kern_data_len; 2399 ctl_sg_count = 1; 2400 } 2401 2402 /* 2403 * This is the total amount of data to be transferred within the current 2404 * SCSI command. We need to record it so that we can properly report 2405 * underflow/underflow. 2406 */ 2407 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2408 2409 /* 2410 * This is the offset within the current SCSI command; for the first 2411 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2412 * it will be the sum of lengths of previous ones. 2413 */ 2414 buffer_offset = io->scsiio.kern_rel_offset; 2415 2416 /* 2417 * This is the transfer length expected by the initiator. In theory, 2418 * it could be different from the correct amount of data from the SCSI 2419 * point of view, even if that doesn't make any sense. 2420 */ 2421 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2422#if 0 2423 if (expected_len != io->scsiio.kern_total_len) { 2424 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2425 "actual length %zd", expected_len, 2426 (size_t)io->scsiio.kern_total_len); 2427 } 2428#endif 2429 2430 if (buffer_offset >= expected_len) { 2431#if 0 2432 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2433 "already sent the expected len", buffer_offset); 2434#endif 2435 io->scsiio.be_move_done(io); 2436 return; 2437 } 2438 2439 i = 0; 2440 sg_addr = NULL; 2441 sg_len = 0; 2442 response = NULL; 2443 bhsdi = NULL; 2444 for (;;) { 2445 if (response == NULL) { 2446 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2447 if (response == NULL) { 2448 CFISCSI_SESSION_WARN(cs, "failed to " 2449 "allocate memory; dropping connection"); 2450 ctl_set_busy(&io->scsiio); 2451 io->scsiio.be_move_done(io); 2452 cfiscsi_session_terminate(cs); 2453 return; 2454 } 2455 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2456 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2457 bhsdi->bhsdi_initiator_task_tag = 2458 bhssc->bhssc_initiator_task_tag; 2459 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2460 PDU_EXPDATASN(request)++; 2461 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2462 } 2463 2464 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2465 if (sg_len == 0) { 2466 sg_addr = ctl_sglist[i].addr; 2467 sg_len = ctl_sglist[i].len; 2468 KASSERT(sg_len > 0, ("sg_len <= 0")); 2469 } 2470 2471 len = sg_len; 2472 2473 /* 2474 * Truncate to maximum data segment length. 2475 */ 2476 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2477 ("ip_data_len %zd >= max_data_segment_length %zd", 2478 response->ip_data_len, cs->cs_max_data_segment_length)); 2479 if (response->ip_data_len + len > 2480 cs->cs_max_data_segment_length) { 2481 len = cs->cs_max_data_segment_length - 2482 response->ip_data_len; 2483 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2484 len, sg_len)); 2485 } 2486 2487 /* 2488 * Truncate to expected data transfer length. 2489 */ 2490 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2491 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2492 buffer_offset, response->ip_data_len, expected_len)); 2493 if (buffer_offset + response->ip_data_len + len > expected_len) { 2494 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2495 "to expected data transfer length %zd", 2496 buffer_offset + response->ip_data_len + len, expected_len); 2497 len = expected_len - (buffer_offset + response->ip_data_len); 2498 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2499 len, sg_len)); 2500 } 2501 2502 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2503 if (error != 0) { 2504 CFISCSI_SESSION_WARN(cs, "failed to " 2505 "allocate memory; dropping connection"); 2506 icl_pdu_free(response); 2507 ctl_set_busy(&io->scsiio); 2508 io->scsiio.be_move_done(io); 2509 cfiscsi_session_terminate(cs); 2510 return; 2511 } 2512 sg_addr += len; 2513 sg_len -= len; 2514 2515 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2516 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2517 buffer_offset, response->ip_data_len, expected_len)); 2518 if (buffer_offset + response->ip_data_len == expected_len) { 2519 /* 2520 * Already have the amount of data the initiator wanted. 2521 */ 2522 break; 2523 } 2524 2525 if (sg_len == 0) { 2526 /* 2527 * End of scatter-gather segment; 2528 * proceed to the next one... 2529 */ 2530 if (i == ctl_sg_count - 1) { 2531 /* 2532 * ... unless this was the last one. 2533 */ 2534 break; 2535 } 2536 i++; 2537 } 2538 2539 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2540 /* 2541 * Can't stuff more data into the current PDU; 2542 * queue it. Note that's not enough to check 2543 * for kern_data_resid == 0 instead; there 2544 * may be several Data-In PDUs for the final 2545 * call to cfiscsi_datamove(), and we want 2546 * to set the F flag only on the last of them. 2547 */ 2548 buffer_offset += response->ip_data_len; 2549 if (buffer_offset == io->scsiio.kern_total_len || 2550 buffer_offset == expected_len) 2551 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2552 cfiscsi_pdu_queue(response); 2553 response = NULL; 2554 bhsdi = NULL; 2555 } 2556 } 2557 if (response != NULL) { 2558 buffer_offset += response->ip_data_len; 2559 if (buffer_offset == io->scsiio.kern_total_len || 2560 buffer_offset == expected_len) 2561 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2562 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2563 cfiscsi_pdu_queue(response); 2564 } 2565 2566 io->scsiio.be_move_done(io); 2567} 2568 2569static void 2570cfiscsi_datamove_out(union ctl_io *io) 2571{ 2572 struct cfiscsi_session *cs; 2573 struct icl_pdu *request, *response; 2574 const struct iscsi_bhs_scsi_command *bhssc; 2575 struct iscsi_bhs_r2t *bhsr2t; 2576 struct cfiscsi_data_wait *cdw; 2577 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2578 uint32_t expected_len, r2t_off, r2t_len; 2579 uint32_t target_transfer_tag; 2580 bool done; 2581 2582 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2583 cs = PDU_SESSION(request); 2584 2585 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2586 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2587 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2588 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2589 2590 /* 2591 * We need to record it so that we can properly report 2592 * underflow/underflow. 2593 */ 2594 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2595 2596 /* 2597 * Report write underflow as error since CTL and backends don't 2598 * really support it, and SCSI does not tell how to do it right. 2599 */ 2600 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2601 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2602 expected_len) { 2603 io->scsiio.io_hdr.port_status = 43; 2604 io->scsiio.be_move_done(io); 2605 return; 2606 } 2607 2608 target_transfer_tag = 2609 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2610 2611#if 0 2612 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2613 "task tag 0x%x, target transfer tag 0x%x", 2614 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2615#endif 2616 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2617 if (cdw == NULL) { 2618 CFISCSI_SESSION_WARN(cs, "failed to " 2619 "allocate memory; dropping connection"); 2620 ctl_set_busy(&io->scsiio); 2621 io->scsiio.be_move_done(io); 2622 cfiscsi_session_terminate(cs); 2623 return; 2624 } 2625 cdw->cdw_ctl_io = io; 2626 cdw->cdw_target_transfer_tag = target_transfer_tag; 2627 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2628 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2629 2630 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2631 if (io->scsiio.kern_sg_entries > 0) { 2632 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2633 } else { 2634 ctl_sglist = &ctl_sg_entry; 2635 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2636 ctl_sglist->len = io->scsiio.kern_data_len; 2637 } 2638 cdw->cdw_sg_index = 0; 2639 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2640 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2641 r2t_off = io->scsiio.ext_data_filled; 2642 while (r2t_off > 0) { 2643 if (r2t_off >= cdw->cdw_sg_len) { 2644 r2t_off -= cdw->cdw_sg_len; 2645 cdw->cdw_sg_index++; 2646 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2647 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2648 continue; 2649 } 2650 cdw->cdw_sg_addr += r2t_off; 2651 cdw->cdw_sg_len -= r2t_off; 2652 r2t_off = 0; 2653 } 2654 2655 if (cs->cs_immediate_data && 2656 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2657 icl_pdu_data_segment_length(request)) { 2658 done = cfiscsi_handle_data_segment(request, cdw); 2659 if (done) { 2660 uma_zfree(cfiscsi_data_wait_zone, cdw); 2661 io->scsiio.be_move_done(io); 2662 return; 2663 } 2664 } 2665 2666 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2667 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2668 cs->cs_max_burst_length); 2669 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2670 2671 CFISCSI_SESSION_LOCK(cs); 2672 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2673 CFISCSI_SESSION_UNLOCK(cs); 2674 2675 /* 2676 * XXX: We should limit the number of outstanding R2T PDUs 2677 * per task to MaxOutstandingR2T. 2678 */ 2679 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2680 if (response == NULL) { 2681 CFISCSI_SESSION_WARN(cs, "failed to " 2682 "allocate memory; dropping connection"); 2683 ctl_set_busy(&io->scsiio); 2684 io->scsiio.be_move_done(io); 2685 cfiscsi_session_terminate(cs); 2686 return; 2687 } 2688 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2689 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2690 bhsr2t->bhsr2t_flags = 0x80; 2691 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2692 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2693 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2694 /* 2695 * XXX: Here we assume that cfiscsi_datamove() won't ever 2696 * be running concurrently on several CPUs for a given 2697 * command. 2698 */ 2699 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2700 PDU_R2TSN(request)++; 2701 /* 2702 * This is the offset within the current SCSI command; 2703 * i.e. for the first call of datamove(), it will be 0, 2704 * and for subsequent ones it will be the sum of lengths 2705 * of previous ones. 2706 * 2707 * The ext_data_filled is to account for unsolicited 2708 * (immediate) data that might have already arrived. 2709 */ 2710 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2711 /* 2712 * This is the total length (sum of S/G lengths) this call 2713 * to cfiscsi_datamove() is supposed to handle, limited by 2714 * MaxBurstLength. 2715 */ 2716 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2717 cfiscsi_pdu_queue(response); 2718} 2719 2720static void 2721cfiscsi_datamove(union ctl_io *io) 2722{ 2723 2724 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2725 cfiscsi_datamove_in(io); 2726 else { 2727 /* We hadn't received anything during this datamove yet. */ 2728 io->scsiio.ext_data_filled = 0; 2729 cfiscsi_datamove_out(io); 2730 } 2731} 2732 2733static void 2734cfiscsi_scsi_command_done(union ctl_io *io) 2735{ 2736 struct icl_pdu *request, *response; 2737 struct iscsi_bhs_scsi_command *bhssc; 2738 struct iscsi_bhs_scsi_response *bhssr; 2739#ifdef DIAGNOSTIC 2740 struct cfiscsi_data_wait *cdw; 2741#endif 2742 struct cfiscsi_session *cs; 2743 uint16_t sense_length; 2744 2745 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2746 cs = PDU_SESSION(request); 2747 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2748 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2749 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2750 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2751 2752 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2753 // bhssc->bhssc_initiator_task_tag); 2754 2755#ifdef DIAGNOSTIC 2756 CFISCSI_SESSION_LOCK(cs); 2757 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2758 KASSERT(bhssc->bhssc_initiator_task_tag != 2759 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2760 CFISCSI_SESSION_UNLOCK(cs); 2761#endif 2762 2763 /* 2764 * Do not return status for aborted commands. 2765 * There are exceptions, but none supported by CTL yet. 2766 */ 2767 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2768 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2769 ctl_free_io(io); 2770 icl_pdu_free(request); 2771 return; 2772 } 2773 2774 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2775 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2776 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2777 bhssr->bhssr_flags = 0x80; 2778 /* 2779 * XXX: We don't deal with bidirectional under/overflows; 2780 * does anything actually support those? 2781 */ 2782 if (PDU_TOTAL_TRANSFER_LEN(request) < 2783 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2784 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2785 bhssr->bhssr_residual_count = 2786 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2787 PDU_TOTAL_TRANSFER_LEN(request)); 2788 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2789 // ntohl(bhssr->bhssr_residual_count)); 2790 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2791 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2792 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2793 bhssr->bhssr_residual_count = 2794 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2795 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2796 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2797 // ntohl(bhssr->bhssr_residual_count)); 2798 } 2799 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2800 bhssr->bhssr_status = io->scsiio.scsi_status; 2801 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2802 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2803 2804 if (io->scsiio.sense_len > 0) { 2805#if 0 2806 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2807 io->scsiio.sense_len); 2808#endif 2809 sense_length = htons(io->scsiio.sense_len); 2810 icl_pdu_append_data(response, 2811 &sense_length, sizeof(sense_length), M_WAITOK); 2812 icl_pdu_append_data(response, 2813 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2814 } 2815 2816 ctl_free_io(io); 2817 icl_pdu_free(request); 2818 cfiscsi_pdu_queue(response); 2819} 2820 2821static void 2822cfiscsi_task_management_done(union ctl_io *io) 2823{ 2824 struct icl_pdu *request, *response; 2825 struct iscsi_bhs_task_management_request *bhstmr; 2826 struct iscsi_bhs_task_management_response *bhstmr2; 2827 struct cfiscsi_data_wait *cdw, *tmpcdw; 2828 struct cfiscsi_session *cs; 2829 2830 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2831 cs = PDU_SESSION(request); 2832 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2833 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2834 ISCSI_BHS_OPCODE_TASK_REQUEST, 2835 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2836 2837#if 0 2838 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2839 bhstmr->bhstmr_initiator_task_tag, 2840 bhstmr->bhstmr_referenced_task_tag); 2841#endif 2842 2843 if ((bhstmr->bhstmr_function & ~0x80) == 2844 BHSTMR_FUNCTION_ABORT_TASK) { 2845 /* 2846 * Make sure we no longer wait for Data-Out for this command. 2847 */ 2848 CFISCSI_SESSION_LOCK(cs); 2849 TAILQ_FOREACH_SAFE(cdw, 2850 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2851 if (bhstmr->bhstmr_referenced_task_tag != 2852 cdw->cdw_initiator_task_tag) 2853 continue; 2854 2855#if 0 2856 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2857 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2858#endif 2859 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2860 cdw, cdw_next); 2861 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2862 uma_zfree(cfiscsi_data_wait_zone, cdw); 2863 } 2864 CFISCSI_SESSION_UNLOCK(cs); 2865 } 2866 2867 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2868 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2869 response->ip_bhs; 2870 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2871 bhstmr2->bhstmr_flags = 0x80; 2872 if (io->io_hdr.status == CTL_SUCCESS) { 2873 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2874 } else { 2875 /* 2876 * XXX: How to figure out what exactly went wrong? iSCSI spec 2877 * expects us to provide detailed error, e.g. "Task does 2878 * not exist" or "LUN does not exist". 2879 */ 2880 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2881 bhstmr2->bhstmr_response = 2882 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2883 } 2884 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2885 2886 ctl_free_io(io); 2887 icl_pdu_free(request); 2888 cfiscsi_pdu_queue(response); 2889} 2890 2891static void 2892cfiscsi_done(union ctl_io *io) 2893{ 2894 struct icl_pdu *request; 2895 struct cfiscsi_session *cs; 2896 2897 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2898 ("invalid CTL status %#x", io->io_hdr.status)); 2899 2900 if (io->io_hdr.io_type == CTL_IO_TASK && 2901 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2902 /* 2903 * Implicit task termination has just completed; nothing to do. 2904 */ 2905 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2906 cs->cs_tasks_aborted = true; 2907 refcount_release(&cs->cs_outstanding_ctl_pdus); 2908 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2909 ctl_free_io(io); 2910 return; 2911 } 2912 2913 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2914 cs = PDU_SESSION(request); 2915 refcount_release(&cs->cs_outstanding_ctl_pdus); 2916 2917 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2918 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2919 cfiscsi_scsi_command_done(io); 2920 break; 2921 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2922 cfiscsi_task_management_done(io); 2923 break; 2924 default: 2925 panic("cfiscsi_done called with wrong opcode 0x%x", 2926 request->ip_bhs->bhs_opcode); 2927 } 2928} 2929