scsi_transport_fc.c revision ff491a7334acfd74e515c896632e37e401f52676
1/* 2 * FiberChannel transport specific attributes exported to sysfs. 3 * 4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 * ======== 21 * 22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation 23 * Rewrite for host, target, device, and remote port attributes, 24 * statistics, and service functions... 25 * Add vports, etc 26 * 27 */ 28#include <linux/module.h> 29#include <linux/init.h> 30#include <scsi/scsi_device.h> 31#include <scsi/scsi_host.h> 32#include <scsi/scsi_transport.h> 33#include <scsi/scsi_transport_fc.h> 34#include <scsi/scsi_cmnd.h> 35#include <linux/netlink.h> 36#include <net/netlink.h> 37#include <scsi/scsi_netlink_fc.h> 38#include "scsi_priv.h" 39#include "scsi_transport_fc_internal.h" 40 41static int fc_queue_work(struct Scsi_Host *, struct work_struct *); 42static void fc_vport_sched_delete(struct work_struct *work); 43static int fc_vport_setup(struct Scsi_Host *shost, int channel, 44 struct device *pdev, struct fc_vport_identifiers *ids, 45 struct fc_vport **vport); 46 47/* 48 * Redefine so that we can have same named attributes in the 49 * sdev/starget/host objects. 50 */ 51#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 52struct device_attribute device_attr_##_prefix##_##_name = \ 53 __ATTR(_name,_mode,_show,_store) 54 55#define fc_enum_name_search(title, table_type, table) \ 56static const char *get_fc_##title##_name(enum table_type table_key) \ 57{ \ 58 int i; \ 59 char *name = NULL; \ 60 \ 61 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 62 if (table[i].value == table_key) { \ 63 name = table[i].name; \ 64 break; \ 65 } \ 66 } \ 67 return name; \ 68} 69 70#define fc_enum_name_match(title, table_type, table) \ 71static int get_fc_##title##_match(const char *table_key, \ 72 enum table_type *value) \ 73{ \ 74 int i; \ 75 \ 76 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 77 if (strncmp(table_key, table[i].name, \ 78 table[i].matchlen) == 0) { \ 79 *value = table[i].value; \ 80 return 0; /* success */ \ 81 } \ 82 } \ 83 return 1; /* failure */ \ 84} 85 86 87/* Convert fc_port_type values to ascii string name */ 88static struct { 89 enum fc_port_type value; 90 char *name; 91} fc_port_type_names[] = { 92 { FC_PORTTYPE_UNKNOWN, "Unknown" }, 93 { FC_PORTTYPE_OTHER, "Other" }, 94 { FC_PORTTYPE_NOTPRESENT, "Not Present" }, 95 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, 96 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, 97 { FC_PORTTYPE_LPORT, "LPort (private loop)" }, 98 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" }, 99 { FC_PORTTYPE_NPIV, "NPIV VPORT" }, 100}; 101fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) 102#define FC_PORTTYPE_MAX_NAMELEN 50 103 104/* Reuse fc_port_type enum function for vport_type */ 105#define get_fc_vport_type_name get_fc_port_type_name 106 107 108/* Convert fc_host_event_code values to ascii string name */ 109static const struct { 110 enum fc_host_event_code value; 111 char *name; 112} fc_host_event_code_names[] = { 113 { FCH_EVT_LIP, "lip" }, 114 { FCH_EVT_LINKUP, "link_up" }, 115 { FCH_EVT_LINKDOWN, "link_down" }, 116 { FCH_EVT_LIPRESET, "lip_reset" }, 117 { FCH_EVT_RSCN, "rscn" }, 118 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, 119 { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, 120 { FCH_EVT_PORT_ONLINE, "port_online" }, 121 { FCH_EVT_PORT_OFFLINE, "port_offline" }, 122 { FCH_EVT_PORT_FABRIC, "port_fabric" }, 123 { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, 124 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 125}; 126fc_enum_name_search(host_event_code, fc_host_event_code, 127 fc_host_event_code_names) 128#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 129 130 131/* Convert fc_port_state values to ascii string name */ 132static struct { 133 enum fc_port_state value; 134 char *name; 135} fc_port_state_names[] = { 136 { FC_PORTSTATE_UNKNOWN, "Unknown" }, 137 { FC_PORTSTATE_NOTPRESENT, "Not Present" }, 138 { FC_PORTSTATE_ONLINE, "Online" }, 139 { FC_PORTSTATE_OFFLINE, "Offline" }, 140 { FC_PORTSTATE_BLOCKED, "Blocked" }, 141 { FC_PORTSTATE_BYPASSED, "Bypassed" }, 142 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, 143 { FC_PORTSTATE_LINKDOWN, "Linkdown" }, 144 { FC_PORTSTATE_ERROR, "Error" }, 145 { FC_PORTSTATE_LOOPBACK, "Loopback" }, 146 { FC_PORTSTATE_DELETED, "Deleted" }, 147}; 148fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 149#define FC_PORTSTATE_MAX_NAMELEN 20 150 151 152/* Convert fc_vport_state values to ascii string name */ 153static struct { 154 enum fc_vport_state value; 155 char *name; 156} fc_vport_state_names[] = { 157 { FC_VPORT_UNKNOWN, "Unknown" }, 158 { FC_VPORT_ACTIVE, "Active" }, 159 { FC_VPORT_DISABLED, "Disabled" }, 160 { FC_VPORT_LINKDOWN, "Linkdown" }, 161 { FC_VPORT_INITIALIZING, "Initializing" }, 162 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 163 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 164 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 165 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 166 { FC_VPORT_FAILED, "VPort Failed" }, 167}; 168fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 169#define FC_VPORTSTATE_MAX_NAMELEN 24 170 171/* Reuse fc_vport_state enum function for vport_last_state */ 172#define get_fc_vport_last_state_name get_fc_vport_state_name 173 174 175/* Convert fc_tgtid_binding_type values to ascii string name */ 176static const struct { 177 enum fc_tgtid_binding_type value; 178 char *name; 179 int matchlen; 180} fc_tgtid_binding_type_names[] = { 181 { FC_TGTID_BIND_NONE, "none", 4 }, 182 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 183 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 184 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 185}; 186fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 187 fc_tgtid_binding_type_names) 188fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 189 fc_tgtid_binding_type_names) 190#define FC_BINDTYPE_MAX_NAMELEN 30 191 192 193#define fc_bitfield_name_search(title, table) \ 194static ssize_t \ 195get_fc_##title##_names(u32 table_key, char *buf) \ 196{ \ 197 char *prefix = ""; \ 198 ssize_t len = 0; \ 199 int i; \ 200 \ 201 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 202 if (table[i].value & table_key) { \ 203 len += sprintf(buf + len, "%s%s", \ 204 prefix, table[i].name); \ 205 prefix = ", "; \ 206 } \ 207 } \ 208 len += sprintf(buf + len, "\n"); \ 209 return len; \ 210} 211 212 213/* Convert FC_COS bit values to ascii string name */ 214static const struct { 215 u32 value; 216 char *name; 217} fc_cos_names[] = { 218 { FC_COS_CLASS1, "Class 1" }, 219 { FC_COS_CLASS2, "Class 2" }, 220 { FC_COS_CLASS3, "Class 3" }, 221 { FC_COS_CLASS4, "Class 4" }, 222 { FC_COS_CLASS6, "Class 6" }, 223}; 224fc_bitfield_name_search(cos, fc_cos_names) 225 226 227/* Convert FC_PORTSPEED bit values to ascii string name */ 228static const struct { 229 u32 value; 230 char *name; 231} fc_port_speed_names[] = { 232 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 233 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 234 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 235 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 236 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 237 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 238 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 239}; 240fc_bitfield_name_search(port_speed, fc_port_speed_names) 241 242 243static int 244show_fc_fc4s (char *buf, u8 *fc4_list) 245{ 246 int i, len=0; 247 248 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 249 len += sprintf(buf + len , "0x%02x ", *fc4_list); 250 len += sprintf(buf + len, "\n"); 251 return len; 252} 253 254 255/* Convert FC_PORT_ROLE bit values to ascii string name */ 256static const struct { 257 u32 value; 258 char *name; 259} fc_port_role_names[] = { 260 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 261 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 262 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 263}; 264fc_bitfield_name_search(port_roles, fc_port_role_names) 265 266/* 267 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 268 */ 269#define FC_WELLKNOWN_PORTID_MASK 0xfffff0 270#define FC_WELLKNOWN_ROLE_MASK 0x00000f 271#define FC_FPORT_PORTID 0x00000e 272#define FC_FABCTLR_PORTID 0x00000d 273#define FC_DIRSRVR_PORTID 0x00000c 274#define FC_TIMESRVR_PORTID 0x00000b 275#define FC_MGMTSRVR_PORTID 0x00000a 276 277 278static void fc_timeout_deleted_rport(struct work_struct *work); 279static void fc_timeout_fail_rport_io(struct work_struct *work); 280static void fc_scsi_scan_rport(struct work_struct *work); 281 282/* 283 * Attribute counts pre object type... 284 * Increase these values if you add attributes 285 */ 286#define FC_STARGET_NUM_ATTRS 3 287#define FC_RPORT_NUM_ATTRS 10 288#define FC_VPORT_NUM_ATTRS 9 289#define FC_HOST_NUM_ATTRS 21 290 291struct fc_internal { 292 struct scsi_transport_template t; 293 struct fc_function_template *f; 294 295 /* 296 * For attributes : each object has : 297 * An array of the actual attributes structures 298 * An array of null-terminated pointers to the attribute 299 * structures - used for mid-layer interaction. 300 * 301 * The attribute containers for the starget and host are are 302 * part of the midlayer. As the remote port is specific to the 303 * fc transport, we must provide the attribute container. 304 */ 305 struct device_attribute private_starget_attrs[ 306 FC_STARGET_NUM_ATTRS]; 307 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 308 309 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 310 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 311 312 struct transport_container rport_attr_cont; 313 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 314 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 315 316 struct transport_container vport_attr_cont; 317 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 318 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 319}; 320 321#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 322 323static int fc_target_setup(struct transport_container *tc, struct device *dev, 324 struct device *cdev) 325{ 326 struct scsi_target *starget = to_scsi_target(dev); 327 struct fc_rport *rport = starget_to_rport(starget); 328 329 /* 330 * if parent is remote port, use values from remote port. 331 * Otherwise, this host uses the fc_transport, but not the 332 * remote port interface. As such, initialize to known non-values. 333 */ 334 if (rport) { 335 fc_starget_node_name(starget) = rport->node_name; 336 fc_starget_port_name(starget) = rport->port_name; 337 fc_starget_port_id(starget) = rport->port_id; 338 } else { 339 fc_starget_node_name(starget) = -1; 340 fc_starget_port_name(starget) = -1; 341 fc_starget_port_id(starget) = -1; 342 } 343 344 return 0; 345} 346 347static DECLARE_TRANSPORT_CLASS(fc_transport_class, 348 "fc_transport", 349 fc_target_setup, 350 NULL, 351 NULL); 352 353static int fc_host_setup(struct transport_container *tc, struct device *dev, 354 struct device *cdev) 355{ 356 struct Scsi_Host *shost = dev_to_shost(dev); 357 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 358 359 /* 360 * Set default values easily detected by the midlayer as 361 * failure cases. The scsi lldd is responsible for initializing 362 * all transport attributes to valid values per host. 363 */ 364 fc_host->node_name = -1; 365 fc_host->port_name = -1; 366 fc_host->permanent_port_name = -1; 367 fc_host->supported_classes = FC_COS_UNSPECIFIED; 368 memset(fc_host->supported_fc4s, 0, 369 sizeof(fc_host->supported_fc4s)); 370 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 371 fc_host->maxframe_size = -1; 372 fc_host->max_npiv_vports = 0; 373 memset(fc_host->serial_number, 0, 374 sizeof(fc_host->serial_number)); 375 376 fc_host->port_id = -1; 377 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 378 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 379 memset(fc_host->active_fc4s, 0, 380 sizeof(fc_host->active_fc4s)); 381 fc_host->speed = FC_PORTSPEED_UNKNOWN; 382 fc_host->fabric_name = -1; 383 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 384 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 385 386 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 387 388 INIT_LIST_HEAD(&fc_host->rports); 389 INIT_LIST_HEAD(&fc_host->rport_bindings); 390 INIT_LIST_HEAD(&fc_host->vports); 391 fc_host->next_rport_number = 0; 392 fc_host->next_target_id = 0; 393 fc_host->next_vport_number = 0; 394 fc_host->npiv_vports_inuse = 0; 395 396 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 397 "fc_wq_%d", shost->host_no); 398 fc_host->work_q = create_singlethread_workqueue( 399 fc_host->work_q_name); 400 if (!fc_host->work_q) 401 return -ENOMEM; 402 403 snprintf(fc_host->devloss_work_q_name, 404 sizeof(fc_host->devloss_work_q_name), 405 "fc_dl_%d", shost->host_no); 406 fc_host->devloss_work_q = create_singlethread_workqueue( 407 fc_host->devloss_work_q_name); 408 if (!fc_host->devloss_work_q) { 409 destroy_workqueue(fc_host->work_q); 410 fc_host->work_q = NULL; 411 return -ENOMEM; 412 } 413 414 return 0; 415} 416 417static DECLARE_TRANSPORT_CLASS(fc_host_class, 418 "fc_host", 419 fc_host_setup, 420 NULL, 421 NULL); 422 423/* 424 * Setup and Remove actions for remote ports are handled 425 * in the service functions below. 426 */ 427static DECLARE_TRANSPORT_CLASS(fc_rport_class, 428 "fc_remote_ports", 429 NULL, 430 NULL, 431 NULL); 432 433/* 434 * Setup and Remove actions for virtual ports are handled 435 * in the service functions below. 436 */ 437static DECLARE_TRANSPORT_CLASS(fc_vport_class, 438 "fc_vports", 439 NULL, 440 NULL, 441 NULL); 442 443/* 444 * Module Parameters 445 */ 446 447/* 448 * dev_loss_tmo: the default number of seconds that the FC transport 449 * should insulate the loss of a remote port. 450 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 451 */ 452static unsigned int fc_dev_loss_tmo = 60; /* seconds */ 453 454module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); 455MODULE_PARM_DESC(dev_loss_tmo, 456 "Maximum number of seconds that the FC transport should" 457 " insulate the loss of a remote port. Once this value is" 458 " exceeded, the scsi target is removed. Value should be" 459 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); 460 461/* 462 * Netlink Infrastructure 463 */ 464 465static atomic_t fc_event_seq; 466 467/** 468 * fc_get_event_number - Obtain the next sequential FC event number 469 * 470 * Notes: 471 * We could have inlined this, but it would have required fc_event_seq to 472 * be exposed. For now, live with the subroutine call. 473 * Atomic used to avoid lock/unlock... 474 */ 475u32 476fc_get_event_number(void) 477{ 478 return atomic_add_return(1, &fc_event_seq); 479} 480EXPORT_SYMBOL(fc_get_event_number); 481 482 483/** 484 * fc_host_post_event - called to post an even on an fc_host. 485 * @shost: host the event occurred on 486 * @event_number: fc event number obtained from get_fc_event_number() 487 * @event_code: fc_host event being posted 488 * @event_data: 32bits of data for the event being posted 489 * 490 * Notes: 491 * This routine assumes no locks are held on entry. 492 */ 493void 494fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 495 enum fc_host_event_code event_code, u32 event_data) 496{ 497 struct sk_buff *skb; 498 struct nlmsghdr *nlh; 499 struct fc_nl_event *event; 500 const char *name; 501 u32 len, skblen; 502 int err; 503 504 if (!scsi_nl_sock) { 505 err = -ENOENT; 506 goto send_fail; 507 } 508 509 len = FC_NL_MSGALIGN(sizeof(*event)); 510 skblen = NLMSG_SPACE(len); 511 512 skb = alloc_skb(skblen, GFP_KERNEL); 513 if (!skb) { 514 err = -ENOBUFS; 515 goto send_fail; 516 } 517 518 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, 519 skblen - sizeof(*nlh), 0); 520 if (!nlh) { 521 err = -ENOBUFS; 522 goto send_fail_skb; 523 } 524 event = NLMSG_DATA(nlh); 525 526 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 527 FC_NL_ASYNC_EVENT, len); 528 event->seconds = get_seconds(); 529 event->vendor_id = 0; 530 event->host_no = shost->host_no; 531 event->event_datalen = sizeof(u32); /* bytes */ 532 event->event_num = event_number; 533 event->event_code = event_code; 534 event->event_data = event_data; 535 536 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 537 GFP_KERNEL); 538 return; 539 540send_fail_skb: 541 kfree_skb(skb); 542send_fail: 543 name = get_fc_host_event_code_name(event_code); 544 printk(KERN_WARNING 545 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 546 __func__, shost->host_no, 547 (name) ? name : "<unknown>", event_data, err); 548 return; 549} 550EXPORT_SYMBOL(fc_host_post_event); 551 552 553/** 554 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host 555 * @shost: host the event occurred on 556 * @event_number: fc event number obtained from get_fc_event_number() 557 * @data_len: amount, in bytes, of vendor unique data 558 * @data_buf: pointer to vendor unique data 559 * @vendor_id: Vendor id 560 * 561 * Notes: 562 * This routine assumes no locks are held on entry. 563 */ 564void 565fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 566 u32 data_len, char * data_buf, u64 vendor_id) 567{ 568 struct sk_buff *skb; 569 struct nlmsghdr *nlh; 570 struct fc_nl_event *event; 571 u32 len, skblen; 572 int err; 573 574 if (!scsi_nl_sock) { 575 err = -ENOENT; 576 goto send_vendor_fail; 577 } 578 579 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 580 skblen = NLMSG_SPACE(len); 581 582 skb = alloc_skb(skblen, GFP_KERNEL); 583 if (!skb) { 584 err = -ENOBUFS; 585 goto send_vendor_fail; 586 } 587 588 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, 589 skblen - sizeof(*nlh), 0); 590 if (!nlh) { 591 err = -ENOBUFS; 592 goto send_vendor_fail_skb; 593 } 594 event = NLMSG_DATA(nlh); 595 596 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 597 FC_NL_ASYNC_EVENT, len); 598 event->seconds = get_seconds(); 599 event->vendor_id = vendor_id; 600 event->host_no = shost->host_no; 601 event->event_datalen = data_len; /* bytes */ 602 event->event_num = event_number; 603 event->event_code = FCH_EVT_VENDOR_UNIQUE; 604 memcpy(&event->event_data, data_buf, data_len); 605 606 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 607 GFP_KERNEL); 608 return; 609 610send_vendor_fail_skb: 611 kfree_skb(skb); 612send_vendor_fail: 613 printk(KERN_WARNING 614 "%s: Dropped Event : host %d vendor_unique - err %d\n", 615 __func__, shost->host_no, err); 616 return; 617} 618EXPORT_SYMBOL(fc_host_post_vendor_event); 619 620 621 622static __init int fc_transport_init(void) 623{ 624 int error; 625 626 atomic_set(&fc_event_seq, 0); 627 628 error = transport_class_register(&fc_host_class); 629 if (error) 630 return error; 631 error = transport_class_register(&fc_vport_class); 632 if (error) 633 return error; 634 error = transport_class_register(&fc_rport_class); 635 if (error) 636 return error; 637 return transport_class_register(&fc_transport_class); 638} 639 640static void __exit fc_transport_exit(void) 641{ 642 transport_class_unregister(&fc_transport_class); 643 transport_class_unregister(&fc_rport_class); 644 transport_class_unregister(&fc_host_class); 645 transport_class_unregister(&fc_vport_class); 646} 647 648/* 649 * FC Remote Port Attribute Management 650 */ 651 652#define fc_rport_show_function(field, format_string, sz, cast) \ 653static ssize_t \ 654show_fc_rport_##field (struct device *dev, \ 655 struct device_attribute *attr, char *buf) \ 656{ \ 657 struct fc_rport *rport = transport_class_to_rport(dev); \ 658 struct Scsi_Host *shost = rport_to_shost(rport); \ 659 struct fc_internal *i = to_fc_internal(shost->transportt); \ 660 if ((i->f->get_rport_##field) && \ 661 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 662 (rport->port_state == FC_PORTSTATE_DELETED) || \ 663 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 664 i->f->get_rport_##field(rport); \ 665 return snprintf(buf, sz, format_string, cast rport->field); \ 666} 667 668#define fc_rport_store_function(field) \ 669static ssize_t \ 670store_fc_rport_##field(struct device *dev, \ 671 struct device_attribute *attr, \ 672 const char *buf, size_t count) \ 673{ \ 674 int val; \ 675 struct fc_rport *rport = transport_class_to_rport(dev); \ 676 struct Scsi_Host *shost = rport_to_shost(rport); \ 677 struct fc_internal *i = to_fc_internal(shost->transportt); \ 678 char *cp; \ 679 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 680 (rport->port_state == FC_PORTSTATE_DELETED) || \ 681 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 682 return -EBUSY; \ 683 val = simple_strtoul(buf, &cp, 0); \ 684 if (*cp && (*cp != '\n')) \ 685 return -EINVAL; \ 686 i->f->set_rport_##field(rport, val); \ 687 return count; \ 688} 689 690#define fc_rport_rd_attr(field, format_string, sz) \ 691 fc_rport_show_function(field, format_string, sz, ) \ 692static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 693 show_fc_rport_##field, NULL) 694 695#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 696 fc_rport_show_function(field, format_string, sz, (cast)) \ 697static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 698 show_fc_rport_##field, NULL) 699 700#define fc_rport_rw_attr(field, format_string, sz) \ 701 fc_rport_show_function(field, format_string, sz, ) \ 702 fc_rport_store_function(field) \ 703static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 704 show_fc_rport_##field, \ 705 store_fc_rport_##field) 706 707 708#define fc_private_rport_show_function(field, format_string, sz, cast) \ 709static ssize_t \ 710show_fc_rport_##field (struct device *dev, \ 711 struct device_attribute *attr, char *buf) \ 712{ \ 713 struct fc_rport *rport = transport_class_to_rport(dev); \ 714 return snprintf(buf, sz, format_string, cast rport->field); \ 715} 716 717#define fc_private_rport_rd_attr(field, format_string, sz) \ 718 fc_private_rport_show_function(field, format_string, sz, ) \ 719static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 720 show_fc_rport_##field, NULL) 721 722#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 723 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 724static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 725 show_fc_rport_##field, NULL) 726 727 728#define fc_private_rport_rd_enum_attr(title, maxlen) \ 729static ssize_t \ 730show_fc_rport_##title (struct device *dev, \ 731 struct device_attribute *attr, char *buf) \ 732{ \ 733 struct fc_rport *rport = transport_class_to_rport(dev); \ 734 const char *name; \ 735 name = get_fc_##title##_name(rport->title); \ 736 if (!name) \ 737 return -EINVAL; \ 738 return snprintf(buf, maxlen, "%s\n", name); \ 739} \ 740static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 741 show_fc_rport_##title, NULL) 742 743 744#define SETUP_RPORT_ATTRIBUTE_RD(field) \ 745 i->private_rport_attrs[count] = device_attr_rport_##field; \ 746 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 747 i->private_rport_attrs[count].store = NULL; \ 748 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 749 if (i->f->show_rport_##field) \ 750 count++ 751 752#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 753 i->private_rport_attrs[count] = device_attr_rport_##field; \ 754 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 755 i->private_rport_attrs[count].store = NULL; \ 756 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 757 count++ 758 759#define SETUP_RPORT_ATTRIBUTE_RW(field) \ 760 i->private_rport_attrs[count] = device_attr_rport_##field; \ 761 if (!i->f->set_rport_##field) { \ 762 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 763 i->private_rport_attrs[count].store = NULL; \ 764 } \ 765 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 766 if (i->f->show_rport_##field) \ 767 count++ 768 769#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 770{ \ 771 i->private_rport_attrs[count] = device_attr_rport_##field; \ 772 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 773 count++; \ 774} 775 776 777/* The FC Transport Remote Port Attributes: */ 778 779/* Fixed Remote Port Attributes */ 780 781fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 782 783static ssize_t 784show_fc_rport_supported_classes (struct device *dev, 785 struct device_attribute *attr, char *buf) 786{ 787 struct fc_rport *rport = transport_class_to_rport(dev); 788 if (rport->supported_classes == FC_COS_UNSPECIFIED) 789 return snprintf(buf, 20, "unspecified\n"); 790 return get_fc_cos_names(rport->supported_classes, buf); 791} 792static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 793 show_fc_rport_supported_classes, NULL); 794 795/* Dynamic Remote Port Attributes */ 796 797/* 798 * dev_loss_tmo attribute 799 */ 800fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 801static ssize_t 802store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 803 const char *buf, size_t count) 804{ 805 int val; 806 struct fc_rport *rport = transport_class_to_rport(dev); 807 struct Scsi_Host *shost = rport_to_shost(rport); 808 struct fc_internal *i = to_fc_internal(shost->transportt); 809 char *cp; 810 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 811 (rport->port_state == FC_PORTSTATE_DELETED) || 812 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 813 return -EBUSY; 814 val = simple_strtoul(buf, &cp, 0); 815 if ((*cp && (*cp != '\n')) || 816 (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 817 return -EINVAL; 818 i->f->set_rport_dev_loss_tmo(rport, val); 819 return count; 820} 821static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 822 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 823 824 825/* Private Remote Port Attributes */ 826 827fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 828fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 829fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 830 831static ssize_t 832show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 833 char *buf) 834{ 835 struct fc_rport *rport = transport_class_to_rport(dev); 836 837 /* identify any roles that are port_id specific */ 838 if ((rport->port_id != -1) && 839 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 840 FC_WELLKNOWN_PORTID_MASK) { 841 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 842 case FC_FPORT_PORTID: 843 return snprintf(buf, 30, "Fabric Port\n"); 844 case FC_FABCTLR_PORTID: 845 return snprintf(buf, 30, "Fabric Controller\n"); 846 case FC_DIRSRVR_PORTID: 847 return snprintf(buf, 30, "Directory Server\n"); 848 case FC_TIMESRVR_PORTID: 849 return snprintf(buf, 30, "Time Server\n"); 850 case FC_MGMTSRVR_PORTID: 851 return snprintf(buf, 30, "Management Server\n"); 852 default: 853 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 854 } 855 } else { 856 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 857 return snprintf(buf, 20, "unknown\n"); 858 return get_fc_port_roles_names(rport->roles, buf); 859 } 860} 861static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 862 show_fc_rport_roles, NULL); 863 864fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 865fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 866 867/* 868 * fast_io_fail_tmo attribute 869 */ 870static ssize_t 871show_fc_rport_fast_io_fail_tmo (struct device *dev, 872 struct device_attribute *attr, char *buf) 873{ 874 struct fc_rport *rport = transport_class_to_rport(dev); 875 876 if (rport->fast_io_fail_tmo == -1) 877 return snprintf(buf, 5, "off\n"); 878 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 879} 880 881static ssize_t 882store_fc_rport_fast_io_fail_tmo(struct device *dev, 883 struct device_attribute *attr, const char *buf, 884 size_t count) 885{ 886 int val; 887 char *cp; 888 struct fc_rport *rport = transport_class_to_rport(dev); 889 890 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 891 (rport->port_state == FC_PORTSTATE_DELETED) || 892 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 893 return -EBUSY; 894 if (strncmp(buf, "off", 3) == 0) 895 rport->fast_io_fail_tmo = -1; 896 else { 897 val = simple_strtoul(buf, &cp, 0); 898 if ((*cp && (*cp != '\n')) || 899 (val < 0) || (val >= rport->dev_loss_tmo)) 900 return -EINVAL; 901 rport->fast_io_fail_tmo = val; 902 } 903 return count; 904} 905static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 906 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 907 908 909/* 910 * FC SCSI Target Attribute Management 911 */ 912 913/* 914 * Note: in the target show function we recognize when the remote 915 * port is in the heirarchy and do not allow the driver to get 916 * involved in sysfs functions. The driver only gets involved if 917 * it's the "old" style that doesn't use rports. 918 */ 919#define fc_starget_show_function(field, format_string, sz, cast) \ 920static ssize_t \ 921show_fc_starget_##field (struct device *dev, \ 922 struct device_attribute *attr, char *buf) \ 923{ \ 924 struct scsi_target *starget = transport_class_to_starget(dev); \ 925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 926 struct fc_internal *i = to_fc_internal(shost->transportt); \ 927 struct fc_rport *rport = starget_to_rport(starget); \ 928 if (rport) \ 929 fc_starget_##field(starget) = rport->field; \ 930 else if (i->f->get_starget_##field) \ 931 i->f->get_starget_##field(starget); \ 932 return snprintf(buf, sz, format_string, \ 933 cast fc_starget_##field(starget)); \ 934} 935 936#define fc_starget_rd_attr(field, format_string, sz) \ 937 fc_starget_show_function(field, format_string, sz, ) \ 938static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 939 show_fc_starget_##field, NULL) 940 941#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 942 fc_starget_show_function(field, format_string, sz, (cast)) \ 943static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 944 show_fc_starget_##field, NULL) 945 946#define SETUP_STARGET_ATTRIBUTE_RD(field) \ 947 i->private_starget_attrs[count] = device_attr_starget_##field; \ 948 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 949 i->private_starget_attrs[count].store = NULL; \ 950 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 951 if (i->f->show_starget_##field) \ 952 count++ 953 954#define SETUP_STARGET_ATTRIBUTE_RW(field) \ 955 i->private_starget_attrs[count] = device_attr_starget_##field; \ 956 if (!i->f->set_starget_##field) { \ 957 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 958 i->private_starget_attrs[count].store = NULL; \ 959 } \ 960 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 961 if (i->f->show_starget_##field) \ 962 count++ 963 964/* The FC Transport SCSI Target Attributes: */ 965fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 966fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 967fc_starget_rd_attr(port_id, "0x%06x\n", 20); 968 969 970/* 971 * FC Virtual Port Attribute Management 972 */ 973 974#define fc_vport_show_function(field, format_string, sz, cast) \ 975static ssize_t \ 976show_fc_vport_##field (struct device *dev, \ 977 struct device_attribute *attr, char *buf) \ 978{ \ 979 struct fc_vport *vport = transport_class_to_vport(dev); \ 980 struct Scsi_Host *shost = vport_to_shost(vport); \ 981 struct fc_internal *i = to_fc_internal(shost->transportt); \ 982 if ((i->f->get_vport_##field) && \ 983 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 984 i->f->get_vport_##field(vport); \ 985 return snprintf(buf, sz, format_string, cast vport->field); \ 986} 987 988#define fc_vport_store_function(field) \ 989static ssize_t \ 990store_fc_vport_##field(struct device *dev, \ 991 struct device_attribute *attr, \ 992 const char *buf, size_t count) \ 993{ \ 994 int val; \ 995 struct fc_vport *vport = transport_class_to_vport(dev); \ 996 struct Scsi_Host *shost = vport_to_shost(vport); \ 997 struct fc_internal *i = to_fc_internal(shost->transportt); \ 998 char *cp; \ 999 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1000 return -EBUSY; \ 1001 val = simple_strtoul(buf, &cp, 0); \ 1002 if (*cp && (*cp != '\n')) \ 1003 return -EINVAL; \ 1004 i->f->set_vport_##field(vport, val); \ 1005 return count; \ 1006} 1007 1008#define fc_vport_store_str_function(field, slen) \ 1009static ssize_t \ 1010store_fc_vport_##field(struct device *dev, \ 1011 struct device_attribute *attr, \ 1012 const char *buf, size_t count) \ 1013{ \ 1014 struct fc_vport *vport = transport_class_to_vport(dev); \ 1015 struct Scsi_Host *shost = vport_to_shost(vport); \ 1016 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1017 unsigned int cnt=count; \ 1018 \ 1019 /* count may include a LF at end of string */ \ 1020 if (buf[cnt-1] == '\n') \ 1021 cnt--; \ 1022 if (cnt > ((slen) - 1)) \ 1023 return -EINVAL; \ 1024 memcpy(vport->field, buf, cnt); \ 1025 i->f->set_vport_##field(vport); \ 1026 return count; \ 1027} 1028 1029#define fc_vport_rd_attr(field, format_string, sz) \ 1030 fc_vport_show_function(field, format_string, sz, ) \ 1031static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1032 show_fc_vport_##field, NULL) 1033 1034#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1035 fc_vport_show_function(field, format_string, sz, (cast)) \ 1036static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1037 show_fc_vport_##field, NULL) 1038 1039#define fc_vport_rw_attr(field, format_string, sz) \ 1040 fc_vport_show_function(field, format_string, sz, ) \ 1041 fc_vport_store_function(field) \ 1042static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1043 show_fc_vport_##field, \ 1044 store_fc_vport_##field) 1045 1046#define fc_private_vport_show_function(field, format_string, sz, cast) \ 1047static ssize_t \ 1048show_fc_vport_##field (struct device *dev, \ 1049 struct device_attribute *attr, char *buf) \ 1050{ \ 1051 struct fc_vport *vport = transport_class_to_vport(dev); \ 1052 return snprintf(buf, sz, format_string, cast vport->field); \ 1053} 1054 1055#define fc_private_vport_store_u32_function(field) \ 1056static ssize_t \ 1057store_fc_vport_##field(struct device *dev, \ 1058 struct device_attribute *attr, \ 1059 const char *buf, size_t count) \ 1060{ \ 1061 u32 val; \ 1062 struct fc_vport *vport = transport_class_to_vport(dev); \ 1063 char *cp; \ 1064 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1065 return -EBUSY; \ 1066 val = simple_strtoul(buf, &cp, 0); \ 1067 if (*cp && (*cp != '\n')) \ 1068 return -EINVAL; \ 1069 vport->field = val; \ 1070 return count; \ 1071} 1072 1073 1074#define fc_private_vport_rd_attr(field, format_string, sz) \ 1075 fc_private_vport_show_function(field, format_string, sz, ) \ 1076static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1077 show_fc_vport_##field, NULL) 1078 1079#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1080 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1081static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1082 show_fc_vport_##field, NULL) 1083 1084#define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1085 fc_private_vport_show_function(field, format_string, sz, ) \ 1086 fc_private_vport_store_u32_function(field) \ 1087static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1088 show_fc_vport_##field, \ 1089 store_fc_vport_##field) 1090 1091 1092#define fc_private_vport_rd_enum_attr(title, maxlen) \ 1093static ssize_t \ 1094show_fc_vport_##title (struct device *dev, \ 1095 struct device_attribute *attr, \ 1096 char *buf) \ 1097{ \ 1098 struct fc_vport *vport = transport_class_to_vport(dev); \ 1099 const char *name; \ 1100 name = get_fc_##title##_name(vport->title); \ 1101 if (!name) \ 1102 return -EINVAL; \ 1103 return snprintf(buf, maxlen, "%s\n", name); \ 1104} \ 1105static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1106 show_fc_vport_##title, NULL) 1107 1108 1109#define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1110 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1111 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1112 i->private_vport_attrs[count].store = NULL; \ 1113 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1114 if (i->f->get_##field) \ 1115 count++ 1116 /* NOTE: Above MACRO differs: checks function not show bit */ 1117 1118#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1119 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1120 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1121 i->private_vport_attrs[count].store = NULL; \ 1122 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1123 count++ 1124 1125#define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1126 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1127 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1128 if (i->f->field) \ 1129 count++ 1130 /* NOTE: Above MACRO differs: checks function */ 1131 1132#define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1133 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1134 if (!i->f->set_vport_##field) { \ 1135 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1136 i->private_vport_attrs[count].store = NULL; \ 1137 } \ 1138 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1139 count++ 1140 /* NOTE: Above MACRO differs: does not check show bit */ 1141 1142#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1143{ \ 1144 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1145 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1146 count++; \ 1147} 1148 1149 1150/* The FC Transport Virtual Port Attributes: */ 1151 1152/* Fixed Virtual Port Attributes */ 1153 1154/* Dynamic Virtual Port Attributes */ 1155 1156/* Private Virtual Port Attributes */ 1157 1158fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1159fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1160fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1161fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1162 1163static ssize_t 1164show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1165 char *buf) 1166{ 1167 struct fc_vport *vport = transport_class_to_vport(dev); 1168 1169 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1170 return snprintf(buf, 20, "unknown\n"); 1171 return get_fc_port_roles_names(vport->roles, buf); 1172} 1173static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1174 1175fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1176 1177fc_private_vport_show_function(symbolic_name, "%s\n", 1178 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1179fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1180static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1181 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1182 1183static ssize_t 1184store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1185 const char *buf, size_t count) 1186{ 1187 struct fc_vport *vport = transport_class_to_vport(dev); 1188 struct Scsi_Host *shost = vport_to_shost(vport); 1189 1190 fc_queue_work(shost, &vport->vport_delete_work); 1191 return count; 1192} 1193static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1194 NULL, store_fc_vport_delete); 1195 1196 1197/* 1198 * Enable/Disable vport 1199 * Write "1" to disable, write "0" to enable 1200 */ 1201static ssize_t 1202store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1203 const char *buf, 1204 size_t count) 1205{ 1206 struct fc_vport *vport = transport_class_to_vport(dev); 1207 struct Scsi_Host *shost = vport_to_shost(vport); 1208 struct fc_internal *i = to_fc_internal(shost->transportt); 1209 int stat; 1210 1211 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1212 return -EBUSY; 1213 1214 if (*buf == '0') { 1215 if (vport->vport_state != FC_VPORT_DISABLED) 1216 return -EALREADY; 1217 } else if (*buf == '1') { 1218 if (vport->vport_state == FC_VPORT_DISABLED) 1219 return -EALREADY; 1220 } else 1221 return -EINVAL; 1222 1223 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1224 return stat ? stat : count; 1225} 1226static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1227 NULL, store_fc_vport_disable); 1228 1229 1230/* 1231 * Host Attribute Management 1232 */ 1233 1234#define fc_host_show_function(field, format_string, sz, cast) \ 1235static ssize_t \ 1236show_fc_host_##field (struct device *dev, \ 1237 struct device_attribute *attr, char *buf) \ 1238{ \ 1239 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1240 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1241 if (i->f->get_host_##field) \ 1242 i->f->get_host_##field(shost); \ 1243 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1244} 1245 1246#define fc_host_store_function(field) \ 1247static ssize_t \ 1248store_fc_host_##field(struct device *dev, \ 1249 struct device_attribute *attr, \ 1250 const char *buf, size_t count) \ 1251{ \ 1252 int val; \ 1253 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1254 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1255 char *cp; \ 1256 \ 1257 val = simple_strtoul(buf, &cp, 0); \ 1258 if (*cp && (*cp != '\n')) \ 1259 return -EINVAL; \ 1260 i->f->set_host_##field(shost, val); \ 1261 return count; \ 1262} 1263 1264#define fc_host_store_str_function(field, slen) \ 1265static ssize_t \ 1266store_fc_host_##field(struct device *dev, \ 1267 struct device_attribute *attr, \ 1268 const char *buf, size_t count) \ 1269{ \ 1270 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1271 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1272 unsigned int cnt=count; \ 1273 \ 1274 /* count may include a LF at end of string */ \ 1275 if (buf[cnt-1] == '\n') \ 1276 cnt--; \ 1277 if (cnt > ((slen) - 1)) \ 1278 return -EINVAL; \ 1279 memcpy(fc_host_##field(shost), buf, cnt); \ 1280 i->f->set_host_##field(shost); \ 1281 return count; \ 1282} 1283 1284#define fc_host_rd_attr(field, format_string, sz) \ 1285 fc_host_show_function(field, format_string, sz, ) \ 1286static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1287 show_fc_host_##field, NULL) 1288 1289#define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1290 fc_host_show_function(field, format_string, sz, (cast)) \ 1291static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1292 show_fc_host_##field, NULL) 1293 1294#define fc_host_rw_attr(field, format_string, sz) \ 1295 fc_host_show_function(field, format_string, sz, ) \ 1296 fc_host_store_function(field) \ 1297static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1298 show_fc_host_##field, \ 1299 store_fc_host_##field) 1300 1301#define fc_host_rd_enum_attr(title, maxlen) \ 1302static ssize_t \ 1303show_fc_host_##title (struct device *dev, \ 1304 struct device_attribute *attr, char *buf) \ 1305{ \ 1306 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1307 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1308 const char *name; \ 1309 if (i->f->get_host_##title) \ 1310 i->f->get_host_##title(shost); \ 1311 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1312 if (!name) \ 1313 return -EINVAL; \ 1314 return snprintf(buf, maxlen, "%s\n", name); \ 1315} \ 1316static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1317 1318#define SETUP_HOST_ATTRIBUTE_RD(field) \ 1319 i->private_host_attrs[count] = device_attr_host_##field; \ 1320 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1321 i->private_host_attrs[count].store = NULL; \ 1322 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1323 if (i->f->show_host_##field) \ 1324 count++ 1325 1326#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1327 i->private_host_attrs[count] = device_attr_host_##field; \ 1328 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1329 i->private_host_attrs[count].store = NULL; \ 1330 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1331 count++ 1332 1333#define SETUP_HOST_ATTRIBUTE_RW(field) \ 1334 i->private_host_attrs[count] = device_attr_host_##field; \ 1335 if (!i->f->set_host_##field) { \ 1336 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1337 i->private_host_attrs[count].store = NULL; \ 1338 } \ 1339 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1340 if (i->f->show_host_##field) \ 1341 count++ 1342 1343 1344#define fc_private_host_show_function(field, format_string, sz, cast) \ 1345static ssize_t \ 1346show_fc_host_##field (struct device *dev, \ 1347 struct device_attribute *attr, char *buf) \ 1348{ \ 1349 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1350 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1351} 1352 1353#define fc_private_host_rd_attr(field, format_string, sz) \ 1354 fc_private_host_show_function(field, format_string, sz, ) \ 1355static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1356 show_fc_host_##field, NULL) 1357 1358#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1359 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1360static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1361 show_fc_host_##field, NULL) 1362 1363#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1364 i->private_host_attrs[count] = device_attr_host_##field; \ 1365 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1366 i->private_host_attrs[count].store = NULL; \ 1367 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1368 count++ 1369 1370#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1371{ \ 1372 i->private_host_attrs[count] = device_attr_host_##field; \ 1373 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1374 count++; \ 1375} 1376 1377 1378/* Fixed Host Attributes */ 1379 1380static ssize_t 1381show_fc_host_supported_classes (struct device *dev, 1382 struct device_attribute *attr, char *buf) 1383{ 1384 struct Scsi_Host *shost = transport_class_to_shost(dev); 1385 1386 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1387 return snprintf(buf, 20, "unspecified\n"); 1388 1389 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1390} 1391static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1392 show_fc_host_supported_classes, NULL); 1393 1394static ssize_t 1395show_fc_host_supported_fc4s (struct device *dev, 1396 struct device_attribute *attr, char *buf) 1397{ 1398 struct Scsi_Host *shost = transport_class_to_shost(dev); 1399 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1400} 1401static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1402 show_fc_host_supported_fc4s, NULL); 1403 1404static ssize_t 1405show_fc_host_supported_speeds (struct device *dev, 1406 struct device_attribute *attr, char *buf) 1407{ 1408 struct Scsi_Host *shost = transport_class_to_shost(dev); 1409 1410 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1411 return snprintf(buf, 20, "unknown\n"); 1412 1413 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1414} 1415static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1416 show_fc_host_supported_speeds, NULL); 1417 1418 1419fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1420fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1421fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1422 unsigned long long); 1423fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1424fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1425fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1426 1427 1428/* Dynamic Host Attributes */ 1429 1430static ssize_t 1431show_fc_host_active_fc4s (struct device *dev, 1432 struct device_attribute *attr, char *buf) 1433{ 1434 struct Scsi_Host *shost = transport_class_to_shost(dev); 1435 struct fc_internal *i = to_fc_internal(shost->transportt); 1436 1437 if (i->f->get_host_active_fc4s) 1438 i->f->get_host_active_fc4s(shost); 1439 1440 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1441} 1442static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1443 show_fc_host_active_fc4s, NULL); 1444 1445static ssize_t 1446show_fc_host_speed (struct device *dev, 1447 struct device_attribute *attr, char *buf) 1448{ 1449 struct Scsi_Host *shost = transport_class_to_shost(dev); 1450 struct fc_internal *i = to_fc_internal(shost->transportt); 1451 1452 if (i->f->get_host_speed) 1453 i->f->get_host_speed(shost); 1454 1455 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1456 return snprintf(buf, 20, "unknown\n"); 1457 1458 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1459} 1460static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1461 show_fc_host_speed, NULL); 1462 1463 1464fc_host_rd_attr(port_id, "0x%06x\n", 20); 1465fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1466fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1467fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1468fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1469 1470fc_private_host_show_function(system_hostname, "%s\n", 1471 FC_SYMBOLIC_NAME_SIZE + 1, ) 1472fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1473static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1474 show_fc_host_system_hostname, store_fc_host_system_hostname); 1475 1476 1477/* Private Host Attributes */ 1478 1479static ssize_t 1480show_fc_private_host_tgtid_bind_type(struct device *dev, 1481 struct device_attribute *attr, char *buf) 1482{ 1483 struct Scsi_Host *shost = transport_class_to_shost(dev); 1484 const char *name; 1485 1486 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1487 if (!name) 1488 return -EINVAL; 1489 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1490} 1491 1492#define get_list_head_entry(pos, head, member) \ 1493 pos = list_entry((head)->next, typeof(*pos), member) 1494 1495static ssize_t 1496store_fc_private_host_tgtid_bind_type(struct device *dev, 1497 struct device_attribute *attr, const char *buf, size_t count) 1498{ 1499 struct Scsi_Host *shost = transport_class_to_shost(dev); 1500 struct fc_rport *rport; 1501 enum fc_tgtid_binding_type val; 1502 unsigned long flags; 1503 1504 if (get_fc_tgtid_bind_type_match(buf, &val)) 1505 return -EINVAL; 1506 1507 /* if changing bind type, purge all unused consistent bindings */ 1508 if (val != fc_host_tgtid_bind_type(shost)) { 1509 spin_lock_irqsave(shost->host_lock, flags); 1510 while (!list_empty(&fc_host_rport_bindings(shost))) { 1511 get_list_head_entry(rport, 1512 &fc_host_rport_bindings(shost), peers); 1513 list_del(&rport->peers); 1514 rport->port_state = FC_PORTSTATE_DELETED; 1515 fc_queue_work(shost, &rport->rport_delete_work); 1516 } 1517 spin_unlock_irqrestore(shost->host_lock, flags); 1518 } 1519 1520 fc_host_tgtid_bind_type(shost) = val; 1521 return count; 1522} 1523 1524static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1525 show_fc_private_host_tgtid_bind_type, 1526 store_fc_private_host_tgtid_bind_type); 1527 1528static ssize_t 1529store_fc_private_host_issue_lip(struct device *dev, 1530 struct device_attribute *attr, const char *buf, size_t count) 1531{ 1532 struct Scsi_Host *shost = transport_class_to_shost(dev); 1533 struct fc_internal *i = to_fc_internal(shost->transportt); 1534 int ret; 1535 1536 /* ignore any data value written to the attribute */ 1537 if (i->f->issue_fc_host_lip) { 1538 ret = i->f->issue_fc_host_lip(shost); 1539 return ret ? ret: count; 1540 } 1541 1542 return -ENOENT; 1543} 1544 1545static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1546 store_fc_private_host_issue_lip); 1547 1548fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1549 1550 1551/* 1552 * Host Statistics Management 1553 */ 1554 1555/* Show a given an attribute in the statistics group */ 1556static ssize_t 1557fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1558{ 1559 struct Scsi_Host *shost = transport_class_to_shost(dev); 1560 struct fc_internal *i = to_fc_internal(shost->transportt); 1561 struct fc_host_statistics *stats; 1562 ssize_t ret = -ENOENT; 1563 1564 if (offset > sizeof(struct fc_host_statistics) || 1565 offset % sizeof(u64) != 0) 1566 WARN_ON(1); 1567 1568 if (i->f->get_fc_host_stats) { 1569 stats = (i->f->get_fc_host_stats)(shost); 1570 if (stats) 1571 ret = snprintf(buf, 20, "0x%llx\n", 1572 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1573 } 1574 return ret; 1575} 1576 1577 1578/* generate a read-only statistics attribute */ 1579#define fc_host_statistic(name) \ 1580static ssize_t show_fcstat_##name(struct device *cd, \ 1581 struct device_attribute *attr, \ 1582 char *buf) \ 1583{ \ 1584 return fc_stat_show(cd, buf, \ 1585 offsetof(struct fc_host_statistics, name)); \ 1586} \ 1587static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1588 1589fc_host_statistic(seconds_since_last_reset); 1590fc_host_statistic(tx_frames); 1591fc_host_statistic(tx_words); 1592fc_host_statistic(rx_frames); 1593fc_host_statistic(rx_words); 1594fc_host_statistic(lip_count); 1595fc_host_statistic(nos_count); 1596fc_host_statistic(error_frames); 1597fc_host_statistic(dumped_frames); 1598fc_host_statistic(link_failure_count); 1599fc_host_statistic(loss_of_sync_count); 1600fc_host_statistic(loss_of_signal_count); 1601fc_host_statistic(prim_seq_protocol_err_count); 1602fc_host_statistic(invalid_tx_word_count); 1603fc_host_statistic(invalid_crc_count); 1604fc_host_statistic(fcp_input_requests); 1605fc_host_statistic(fcp_output_requests); 1606fc_host_statistic(fcp_control_requests); 1607fc_host_statistic(fcp_input_megabytes); 1608fc_host_statistic(fcp_output_megabytes); 1609 1610static ssize_t 1611fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1612 const char *buf, size_t count) 1613{ 1614 struct Scsi_Host *shost = transport_class_to_shost(dev); 1615 struct fc_internal *i = to_fc_internal(shost->transportt); 1616 1617 /* ignore any data value written to the attribute */ 1618 if (i->f->reset_fc_host_stats) { 1619 i->f->reset_fc_host_stats(shost); 1620 return count; 1621 } 1622 1623 return -ENOENT; 1624} 1625static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1626 fc_reset_statistics); 1627 1628static struct attribute *fc_statistics_attrs[] = { 1629 &device_attr_host_seconds_since_last_reset.attr, 1630 &device_attr_host_tx_frames.attr, 1631 &device_attr_host_tx_words.attr, 1632 &device_attr_host_rx_frames.attr, 1633 &device_attr_host_rx_words.attr, 1634 &device_attr_host_lip_count.attr, 1635 &device_attr_host_nos_count.attr, 1636 &device_attr_host_error_frames.attr, 1637 &device_attr_host_dumped_frames.attr, 1638 &device_attr_host_link_failure_count.attr, 1639 &device_attr_host_loss_of_sync_count.attr, 1640 &device_attr_host_loss_of_signal_count.attr, 1641 &device_attr_host_prim_seq_protocol_err_count.attr, 1642 &device_attr_host_invalid_tx_word_count.attr, 1643 &device_attr_host_invalid_crc_count.attr, 1644 &device_attr_host_fcp_input_requests.attr, 1645 &device_attr_host_fcp_output_requests.attr, 1646 &device_attr_host_fcp_control_requests.attr, 1647 &device_attr_host_fcp_input_megabytes.attr, 1648 &device_attr_host_fcp_output_megabytes.attr, 1649 &device_attr_host_reset_statistics.attr, 1650 NULL 1651}; 1652 1653static struct attribute_group fc_statistics_group = { 1654 .name = "statistics", 1655 .attrs = fc_statistics_attrs, 1656}; 1657 1658 1659/* Host Vport Attributes */ 1660 1661static int 1662fc_parse_wwn(const char *ns, u64 *nm) 1663{ 1664 unsigned int i, j; 1665 u8 wwn[8]; 1666 1667 memset(wwn, 0, sizeof(wwn)); 1668 1669 /* Validate and store the new name */ 1670 for (i=0, j=0; i < 16; i++) { 1671 if ((*ns >= 'a') && (*ns <= 'f')) 1672 j = ((j << 4) | ((*ns++ -'a') + 10)); 1673 else if ((*ns >= 'A') && (*ns <= 'F')) 1674 j = ((j << 4) | ((*ns++ -'A') + 10)); 1675 else if ((*ns >= '0') && (*ns <= '9')) 1676 j = ((j << 4) | (*ns++ -'0')); 1677 else 1678 return -EINVAL; 1679 if (i % 2) { 1680 wwn[i/2] = j & 0xff; 1681 j = 0; 1682 } 1683 } 1684 1685 *nm = wwn_to_u64(wwn); 1686 1687 return 0; 1688} 1689 1690 1691/* 1692 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1693 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1694 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1695 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1696 */ 1697static ssize_t 1698store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1699 const char *buf, size_t count) 1700{ 1701 struct Scsi_Host *shost = transport_class_to_shost(dev); 1702 struct fc_vport_identifiers vid; 1703 struct fc_vport *vport; 1704 unsigned int cnt=count; 1705 int stat; 1706 1707 memset(&vid, 0, sizeof(vid)); 1708 1709 /* count may include a LF at end of string */ 1710 if (buf[cnt-1] == '\n') 1711 cnt--; 1712 1713 /* validate we have enough characters for WWPN */ 1714 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1715 return -EINVAL; 1716 1717 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1718 if (stat) 1719 return stat; 1720 1721 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1722 if (stat) 1723 return stat; 1724 1725 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1726 vid.vport_type = FC_PORTTYPE_NPIV; 1727 /* vid.symbolic_name is already zero/NULL's */ 1728 vid.disable = false; /* always enabled */ 1729 1730 /* we only allow support on Channel 0 !!! */ 1731 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1732 return stat ? stat : count; 1733} 1734static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1735 store_fc_host_vport_create); 1736 1737 1738/* 1739 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1740 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1741 * The WWNs are specified as hex characters, and may *not* contain 1742 * any prefixes (e.g. 0x, x, etc) 1743 */ 1744static ssize_t 1745store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1746 const char *buf, size_t count) 1747{ 1748 struct Scsi_Host *shost = transport_class_to_shost(dev); 1749 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1750 struct fc_vport *vport; 1751 u64 wwpn, wwnn; 1752 unsigned long flags; 1753 unsigned int cnt=count; 1754 int stat, match; 1755 1756 /* count may include a LF at end of string */ 1757 if (buf[cnt-1] == '\n') 1758 cnt--; 1759 1760 /* validate we have enough characters for WWPN */ 1761 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1762 return -EINVAL; 1763 1764 stat = fc_parse_wwn(&buf[0], &wwpn); 1765 if (stat) 1766 return stat; 1767 1768 stat = fc_parse_wwn(&buf[17], &wwnn); 1769 if (stat) 1770 return stat; 1771 1772 spin_lock_irqsave(shost->host_lock, flags); 1773 match = 0; 1774 /* we only allow support on Channel 0 !!! */ 1775 list_for_each_entry(vport, &fc_host->vports, peers) { 1776 if ((vport->channel == 0) && 1777 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1778 match = 1; 1779 break; 1780 } 1781 } 1782 spin_unlock_irqrestore(shost->host_lock, flags); 1783 1784 if (!match) 1785 return -ENODEV; 1786 1787 stat = fc_vport_terminate(vport); 1788 return stat ? stat : count; 1789} 1790static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1791 store_fc_host_vport_delete); 1792 1793 1794static int fc_host_match(struct attribute_container *cont, 1795 struct device *dev) 1796{ 1797 struct Scsi_Host *shost; 1798 struct fc_internal *i; 1799 1800 if (!scsi_is_host_device(dev)) 1801 return 0; 1802 1803 shost = dev_to_shost(dev); 1804 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1805 != &fc_host_class.class) 1806 return 0; 1807 1808 i = to_fc_internal(shost->transportt); 1809 1810 return &i->t.host_attrs.ac == cont; 1811} 1812 1813static int fc_target_match(struct attribute_container *cont, 1814 struct device *dev) 1815{ 1816 struct Scsi_Host *shost; 1817 struct fc_internal *i; 1818 1819 if (!scsi_is_target_device(dev)) 1820 return 0; 1821 1822 shost = dev_to_shost(dev->parent); 1823 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1824 != &fc_host_class.class) 1825 return 0; 1826 1827 i = to_fc_internal(shost->transportt); 1828 1829 return &i->t.target_attrs.ac == cont; 1830} 1831 1832static void fc_rport_dev_release(struct device *dev) 1833{ 1834 struct fc_rport *rport = dev_to_rport(dev); 1835 put_device(dev->parent); 1836 kfree(rport); 1837} 1838 1839int scsi_is_fc_rport(const struct device *dev) 1840{ 1841 return dev->release == fc_rport_dev_release; 1842} 1843EXPORT_SYMBOL(scsi_is_fc_rport); 1844 1845static int fc_rport_match(struct attribute_container *cont, 1846 struct device *dev) 1847{ 1848 struct Scsi_Host *shost; 1849 struct fc_internal *i; 1850 1851 if (!scsi_is_fc_rport(dev)) 1852 return 0; 1853 1854 shost = dev_to_shost(dev->parent); 1855 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1856 != &fc_host_class.class) 1857 return 0; 1858 1859 i = to_fc_internal(shost->transportt); 1860 1861 return &i->rport_attr_cont.ac == cont; 1862} 1863 1864 1865static void fc_vport_dev_release(struct device *dev) 1866{ 1867 struct fc_vport *vport = dev_to_vport(dev); 1868 put_device(dev->parent); /* release kobj parent */ 1869 kfree(vport); 1870} 1871 1872int scsi_is_fc_vport(const struct device *dev) 1873{ 1874 return dev->release == fc_vport_dev_release; 1875} 1876EXPORT_SYMBOL(scsi_is_fc_vport); 1877 1878static int fc_vport_match(struct attribute_container *cont, 1879 struct device *dev) 1880{ 1881 struct fc_vport *vport; 1882 struct Scsi_Host *shost; 1883 struct fc_internal *i; 1884 1885 if (!scsi_is_fc_vport(dev)) 1886 return 0; 1887 vport = dev_to_vport(dev); 1888 1889 shost = vport_to_shost(vport); 1890 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1891 != &fc_host_class.class) 1892 return 0; 1893 1894 i = to_fc_internal(shost->transportt); 1895 return &i->vport_attr_cont.ac == cont; 1896} 1897 1898 1899/** 1900 * fc_timed_out - FC Transport I/O timeout intercept handler 1901 * @scmd: The SCSI command which timed out 1902 * 1903 * This routine protects against error handlers getting invoked while a 1904 * rport is in a blocked state, typically due to a temporarily loss of 1905 * connectivity. If the error handlers are allowed to proceed, requests 1906 * to abort i/o, reset the target, etc will likely fail as there is no way 1907 * to communicate with the device to perform the requested function. These 1908 * failures may result in the midlayer taking the device offline, requiring 1909 * manual intervention to restore operation. 1910 * 1911 * This routine, called whenever an i/o times out, validates the state of 1912 * the underlying rport. If the rport is blocked, it returns 1913 * EH_RESET_TIMER, which will continue to reschedule the timeout. 1914 * Eventually, either the device will return, or devloss_tmo will fire, 1915 * and when the timeout then fires, it will be handled normally. 1916 * If the rport is not blocked, normal error handling continues. 1917 * 1918 * Notes: 1919 * This routine assumes no locks are held on entry. 1920 */ 1921static enum blk_eh_timer_return 1922fc_timed_out(struct scsi_cmnd *scmd) 1923{ 1924 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 1925 1926 if (rport->port_state == FC_PORTSTATE_BLOCKED) 1927 return BLK_EH_RESET_TIMER; 1928 1929 return BLK_EH_NOT_HANDLED; 1930} 1931 1932/* 1933 * Called by fc_user_scan to locate an rport on the shost that 1934 * matches the channel and target id, and invoke scsi_scan_target() 1935 * on the rport. 1936 */ 1937static void 1938fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) 1939{ 1940 struct fc_rport *rport; 1941 unsigned long flags; 1942 1943 spin_lock_irqsave(shost->host_lock, flags); 1944 1945 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 1946 if (rport->scsi_target_id == -1) 1947 continue; 1948 1949 if (rport->port_state != FC_PORTSTATE_ONLINE) 1950 continue; 1951 1952 if ((channel == rport->channel) && 1953 (id == rport->scsi_target_id)) { 1954 spin_unlock_irqrestore(shost->host_lock, flags); 1955 scsi_scan_target(&rport->dev, channel, id, lun, 1); 1956 return; 1957 } 1958 } 1959 1960 spin_unlock_irqrestore(shost->host_lock, flags); 1961} 1962 1963/* 1964 * Called via sysfs scan routines. Necessary, as the FC transport 1965 * wants to place all target objects below the rport object. So this 1966 * routine must invoke the scsi_scan_target() routine with the rport 1967 * object as the parent. 1968 */ 1969static int 1970fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) 1971{ 1972 uint chlo, chhi; 1973 uint tgtlo, tgthi; 1974 1975 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 1976 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 1977 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 1978 return -EINVAL; 1979 1980 if (channel == SCAN_WILD_CARD) { 1981 chlo = 0; 1982 chhi = shost->max_channel + 1; 1983 } else { 1984 chlo = channel; 1985 chhi = channel + 1; 1986 } 1987 1988 if (id == SCAN_WILD_CARD) { 1989 tgtlo = 0; 1990 tgthi = shost->max_id; 1991 } else { 1992 tgtlo = id; 1993 tgthi = id + 1; 1994 } 1995 1996 for ( ; chlo < chhi; chlo++) 1997 for ( ; tgtlo < tgthi; tgtlo++) 1998 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 1999 2000 return 0; 2001} 2002 2003static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, 2004 int result) 2005{ 2006 struct fc_internal *i = to_fc_internal(shost->transportt); 2007 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); 2008} 2009 2010static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) 2011{ 2012 struct fc_internal *i = to_fc_internal(shost->transportt); 2013 return i->f->it_nexus_response(shost, nexus, result); 2014} 2015 2016struct scsi_transport_template * 2017fc_attach_transport(struct fc_function_template *ft) 2018{ 2019 int count; 2020 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2021 GFP_KERNEL); 2022 2023 if (unlikely(!i)) 2024 return NULL; 2025 2026 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2027 i->t.target_attrs.ac.class = &fc_transport_class.class; 2028 i->t.target_attrs.ac.match = fc_target_match; 2029 i->t.target_size = sizeof(struct fc_starget_attrs); 2030 transport_container_register(&i->t.target_attrs); 2031 2032 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2033 i->t.host_attrs.ac.class = &fc_host_class.class; 2034 i->t.host_attrs.ac.match = fc_host_match; 2035 i->t.host_size = sizeof(struct fc_host_attrs); 2036 if (ft->get_fc_host_stats) 2037 i->t.host_attrs.statistics = &fc_statistics_group; 2038 transport_container_register(&i->t.host_attrs); 2039 2040 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2041 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2042 i->rport_attr_cont.ac.match = fc_rport_match; 2043 transport_container_register(&i->rport_attr_cont); 2044 2045 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2046 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2047 i->vport_attr_cont.ac.match = fc_vport_match; 2048 transport_container_register(&i->vport_attr_cont); 2049 2050 i->f = ft; 2051 2052 /* Transport uses the shost workq for scsi scanning */ 2053 i->t.create_work_queue = 1; 2054 2055 i->t.eh_timed_out = fc_timed_out; 2056 2057 i->t.user_scan = fc_user_scan; 2058 2059 /* target-mode drivers' functions */ 2060 i->t.tsk_mgmt_response = fc_tsk_mgmt_response; 2061 i->t.it_nexus_response = fc_it_nexus_response; 2062 2063 /* 2064 * Setup SCSI Target Attributes. 2065 */ 2066 count = 0; 2067 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2068 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2069 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2070 2071 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2072 2073 i->starget_attrs[count] = NULL; 2074 2075 2076 /* 2077 * Setup SCSI Host Attributes. 2078 */ 2079 count=0; 2080 SETUP_HOST_ATTRIBUTE_RD(node_name); 2081 SETUP_HOST_ATTRIBUTE_RD(port_name); 2082 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2083 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2084 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2085 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2086 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2087 if (ft->vport_create) { 2088 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2089 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2090 } 2091 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2092 2093 SETUP_HOST_ATTRIBUTE_RD(port_id); 2094 SETUP_HOST_ATTRIBUTE_RD(port_type); 2095 SETUP_HOST_ATTRIBUTE_RD(port_state); 2096 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2097 SETUP_HOST_ATTRIBUTE_RD(speed); 2098 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2099 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2100 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2101 2102 /* Transport-managed attributes */ 2103 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2104 if (ft->issue_fc_host_lip) 2105 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2106 if (ft->vport_create) 2107 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2108 if (ft->vport_delete) 2109 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2110 2111 BUG_ON(count > FC_HOST_NUM_ATTRS); 2112 2113 i->host_attrs[count] = NULL; 2114 2115 /* 2116 * Setup Remote Port Attributes. 2117 */ 2118 count=0; 2119 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2120 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2121 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2122 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2123 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2124 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2125 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2126 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2127 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2128 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2129 2130 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2131 2132 i->rport_attrs[count] = NULL; 2133 2134 /* 2135 * Setup Virtual Port Attributes. 2136 */ 2137 count=0; 2138 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2139 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2140 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2141 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2142 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2143 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2144 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2145 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2146 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2147 2148 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2149 2150 i->vport_attrs[count] = NULL; 2151 2152 return &i->t; 2153} 2154EXPORT_SYMBOL(fc_attach_transport); 2155 2156void fc_release_transport(struct scsi_transport_template *t) 2157{ 2158 struct fc_internal *i = to_fc_internal(t); 2159 2160 transport_container_unregister(&i->t.target_attrs); 2161 transport_container_unregister(&i->t.host_attrs); 2162 transport_container_unregister(&i->rport_attr_cont); 2163 transport_container_unregister(&i->vport_attr_cont); 2164 2165 kfree(i); 2166} 2167EXPORT_SYMBOL(fc_release_transport); 2168 2169/** 2170 * fc_queue_work - Queue work to the fc_host workqueue. 2171 * @shost: Pointer to Scsi_Host bound to fc_host. 2172 * @work: Work to queue for execution. 2173 * 2174 * Return value: 2175 * 1 - work queued for execution 2176 * 0 - work is already queued 2177 * -EINVAL - work queue doesn't exist 2178 */ 2179static int 2180fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2181{ 2182 if (unlikely(!fc_host_work_q(shost))) { 2183 printk(KERN_ERR 2184 "ERROR: FC host '%s' attempted to queue work, " 2185 "when no workqueue created.\n", shost->hostt->name); 2186 dump_stack(); 2187 2188 return -EINVAL; 2189 } 2190 2191 return queue_work(fc_host_work_q(shost), work); 2192} 2193 2194/** 2195 * fc_flush_work - Flush a fc_host's workqueue. 2196 * @shost: Pointer to Scsi_Host bound to fc_host. 2197 */ 2198static void 2199fc_flush_work(struct Scsi_Host *shost) 2200{ 2201 if (!fc_host_work_q(shost)) { 2202 printk(KERN_ERR 2203 "ERROR: FC host '%s' attempted to flush work, " 2204 "when no workqueue created.\n", shost->hostt->name); 2205 dump_stack(); 2206 return; 2207 } 2208 2209 flush_workqueue(fc_host_work_q(shost)); 2210} 2211 2212/** 2213 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2214 * @shost: Pointer to Scsi_Host bound to fc_host. 2215 * @work: Work to queue for execution. 2216 * @delay: jiffies to delay the work queuing 2217 * 2218 * Return value: 2219 * 1 on success / 0 already queued / < 0 for error 2220 */ 2221static int 2222fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2223 unsigned long delay) 2224{ 2225 if (unlikely(!fc_host_devloss_work_q(shost))) { 2226 printk(KERN_ERR 2227 "ERROR: FC host '%s' attempted to queue work, " 2228 "when no workqueue created.\n", shost->hostt->name); 2229 dump_stack(); 2230 2231 return -EINVAL; 2232 } 2233 2234 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2235} 2236 2237/** 2238 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2239 * @shost: Pointer to Scsi_Host bound to fc_host. 2240 */ 2241static void 2242fc_flush_devloss(struct Scsi_Host *shost) 2243{ 2244 if (!fc_host_devloss_work_q(shost)) { 2245 printk(KERN_ERR 2246 "ERROR: FC host '%s' attempted to flush work, " 2247 "when no workqueue created.\n", shost->hostt->name); 2248 dump_stack(); 2249 return; 2250 } 2251 2252 flush_workqueue(fc_host_devloss_work_q(shost)); 2253} 2254 2255 2256/** 2257 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2258 * @shost: Which &Scsi_Host 2259 * 2260 * This routine is expected to be called immediately preceeding the 2261 * a driver's call to scsi_remove_host(). 2262 * 2263 * WARNING: A driver utilizing the fc_transport, which fails to call 2264 * this routine prior to scsi_remove_host(), will leave dangling 2265 * objects in /sys/class/fc_remote_ports. Access to any of these 2266 * objects can result in a system crash !!! 2267 * 2268 * Notes: 2269 * This routine assumes no locks are held on entry. 2270 */ 2271void 2272fc_remove_host(struct Scsi_Host *shost) 2273{ 2274 struct fc_vport *vport = NULL, *next_vport = NULL; 2275 struct fc_rport *rport = NULL, *next_rport = NULL; 2276 struct workqueue_struct *work_q; 2277 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2278 unsigned long flags; 2279 2280 spin_lock_irqsave(shost->host_lock, flags); 2281 2282 /* Remove any vports */ 2283 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) 2284 fc_queue_work(shost, &vport->vport_delete_work); 2285 2286 /* Remove any remote ports */ 2287 list_for_each_entry_safe(rport, next_rport, 2288 &fc_host->rports, peers) { 2289 list_del(&rport->peers); 2290 rport->port_state = FC_PORTSTATE_DELETED; 2291 fc_queue_work(shost, &rport->rport_delete_work); 2292 } 2293 2294 list_for_each_entry_safe(rport, next_rport, 2295 &fc_host->rport_bindings, peers) { 2296 list_del(&rport->peers); 2297 rport->port_state = FC_PORTSTATE_DELETED; 2298 fc_queue_work(shost, &rport->rport_delete_work); 2299 } 2300 2301 spin_unlock_irqrestore(shost->host_lock, flags); 2302 2303 /* flush all scan work items */ 2304 scsi_flush_work(shost); 2305 2306 /* flush all stgt delete, and rport delete work items, then kill it */ 2307 if (fc_host->work_q) { 2308 work_q = fc_host->work_q; 2309 fc_host->work_q = NULL; 2310 destroy_workqueue(work_q); 2311 } 2312 2313 /* flush all devloss work items, then kill it */ 2314 if (fc_host->devloss_work_q) { 2315 work_q = fc_host->devloss_work_q; 2316 fc_host->devloss_work_q = NULL; 2317 destroy_workqueue(work_q); 2318 } 2319} 2320EXPORT_SYMBOL(fc_remove_host); 2321 2322static void fc_terminate_rport_io(struct fc_rport *rport) 2323{ 2324 struct Scsi_Host *shost = rport_to_shost(rport); 2325 struct fc_internal *i = to_fc_internal(shost->transportt); 2326 2327 /* Involve the LLDD if possible to terminate all io on the rport. */ 2328 if (i->f->terminate_rport_io) 2329 i->f->terminate_rport_io(rport); 2330 2331 /* 2332 * must unblock to flush queued IO. The caller will have set 2333 * the port_state or flags, so that fc_remote_port_chkready will 2334 * fail IO. 2335 */ 2336 scsi_target_unblock(&rport->dev); 2337} 2338 2339/** 2340 * fc_starget_delete - called to delete the scsi decendents of an rport 2341 * @work: remote port to be operated on. 2342 * 2343 * Deletes target and all sdevs. 2344 */ 2345static void 2346fc_starget_delete(struct work_struct *work) 2347{ 2348 struct fc_rport *rport = 2349 container_of(work, struct fc_rport, stgt_delete_work); 2350 2351 fc_terminate_rport_io(rport); 2352 scsi_remove_target(&rport->dev); 2353} 2354 2355 2356/** 2357 * fc_rport_final_delete - finish rport termination and delete it. 2358 * @work: remote port to be deleted. 2359 */ 2360static void 2361fc_rport_final_delete(struct work_struct *work) 2362{ 2363 struct fc_rport *rport = 2364 container_of(work, struct fc_rport, rport_delete_work); 2365 struct device *dev = &rport->dev; 2366 struct Scsi_Host *shost = rport_to_shost(rport); 2367 struct fc_internal *i = to_fc_internal(shost->transportt); 2368 unsigned long flags; 2369 2370 /* 2371 * if a scan is pending, flush the SCSI Host work_q so that 2372 * that we can reclaim the rport scan work element. 2373 */ 2374 if (rport->flags & FC_RPORT_SCAN_PENDING) 2375 scsi_flush_work(shost); 2376 2377 fc_terminate_rport_io(rport); 2378 /* 2379 * Cancel any outstanding timers. These should really exist 2380 * only when rmmod'ing the LLDD and we're asking for 2381 * immediate termination of the rports 2382 */ 2383 spin_lock_irqsave(shost->host_lock, flags); 2384 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2385 spin_unlock_irqrestore(shost->host_lock, flags); 2386 if (!cancel_delayed_work(&rport->fail_io_work)) 2387 fc_flush_devloss(shost); 2388 if (!cancel_delayed_work(&rport->dev_loss_work)) 2389 fc_flush_devloss(shost); 2390 spin_lock_irqsave(shost->host_lock, flags); 2391 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2392 } 2393 spin_unlock_irqrestore(shost->host_lock, flags); 2394 2395 /* Delete SCSI target and sdevs */ 2396 if (rport->scsi_target_id != -1) 2397 fc_starget_delete(&rport->stgt_delete_work); 2398 2399 /* 2400 * Notify the driver that the rport is now dead. The LLDD will 2401 * also guarantee that any communication to the rport is terminated 2402 * 2403 * Avoid this call if we already called it when we preserved the 2404 * rport for the binding. 2405 */ 2406 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2407 (i->f->dev_loss_tmo_callbk)) 2408 i->f->dev_loss_tmo_callbk(rport); 2409 2410 transport_remove_device(dev); 2411 device_del(dev); 2412 transport_destroy_device(dev); 2413 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2414 put_device(dev); /* for self-reference */ 2415} 2416 2417 2418/** 2419 * fc_rport_create - allocates and creates a remote FC port. 2420 * @shost: scsi host the remote port is connected to. 2421 * @channel: Channel on shost port connected to. 2422 * @ids: The world wide names, fc address, and FC4 port 2423 * roles for the remote port. 2424 * 2425 * Allocates and creates the remoter port structure, including the 2426 * class and sysfs creation. 2427 * 2428 * Notes: 2429 * This routine assumes no locks are held on entry. 2430 */ 2431static struct fc_rport * 2432fc_rport_create(struct Scsi_Host *shost, int channel, 2433 struct fc_rport_identifiers *ids) 2434{ 2435 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2436 struct fc_internal *fci = to_fc_internal(shost->transportt); 2437 struct fc_rport *rport; 2438 struct device *dev; 2439 unsigned long flags; 2440 int error; 2441 size_t size; 2442 2443 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2444 rport = kzalloc(size, GFP_KERNEL); 2445 if (unlikely(!rport)) { 2446 printk(KERN_ERR "%s: allocation failure\n", __func__); 2447 return NULL; 2448 } 2449 2450 rport->maxframe_size = -1; 2451 rport->supported_classes = FC_COS_UNSPECIFIED; 2452 rport->dev_loss_tmo = fc_dev_loss_tmo; 2453 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2454 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2455 rport->port_id = ids->port_id; 2456 rport->roles = ids->roles; 2457 rport->port_state = FC_PORTSTATE_ONLINE; 2458 if (fci->f->dd_fcrport_size) 2459 rport->dd_data = &rport[1]; 2460 rport->channel = channel; 2461 rport->fast_io_fail_tmo = -1; 2462 2463 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2464 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2465 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2466 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2467 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2468 2469 spin_lock_irqsave(shost->host_lock, flags); 2470 2471 rport->number = fc_host->next_rport_number++; 2472 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) 2473 rport->scsi_target_id = fc_host->next_target_id++; 2474 else 2475 rport->scsi_target_id = -1; 2476 list_add_tail(&rport->peers, &fc_host->rports); 2477 get_device(&shost->shost_gendev); /* for fc_host->rport list */ 2478 2479 spin_unlock_irqrestore(shost->host_lock, flags); 2480 2481 dev = &rport->dev; 2482 device_initialize(dev); /* takes self reference */ 2483 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2484 dev->release = fc_rport_dev_release; 2485 dev_set_name(dev, "rport-%d:%d-%d", 2486 shost->host_no, channel, rport->number); 2487 transport_setup_device(dev); 2488 2489 error = device_add(dev); 2490 if (error) { 2491 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2492 goto delete_rport; 2493 } 2494 transport_add_device(dev); 2495 transport_configure_device(dev); 2496 2497 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2498 /* initiate a scan of the target */ 2499 rport->flags |= FC_RPORT_SCAN_PENDING; 2500 scsi_queue_work(shost, &rport->scan_work); 2501 } 2502 2503 return rport; 2504 2505delete_rport: 2506 transport_destroy_device(dev); 2507 spin_lock_irqsave(shost->host_lock, flags); 2508 list_del(&rport->peers); 2509 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2510 spin_unlock_irqrestore(shost->host_lock, flags); 2511 put_device(dev->parent); 2512 kfree(rport); 2513 return NULL; 2514} 2515 2516/** 2517 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2518 * @shost: scsi host the remote port is connected to. 2519 * @channel: Channel on shost port connected to. 2520 * @ids: The world wide names, fc address, and FC4 port 2521 * roles for the remote port. 2522 * 2523 * The LLDD calls this routine to notify the transport of the existence 2524 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2525 * of the port, it's FC address (port_id), and the FC4 roles that are 2526 * active for the port. 2527 * 2528 * For ports that are FCP targets (aka scsi targets), the FC transport 2529 * maintains consistent target id bindings on behalf of the LLDD. 2530 * A consistent target id binding is an assignment of a target id to 2531 * a remote port identifier, which persists while the scsi host is 2532 * attached. The remote port can disappear, then later reappear, and 2533 * it's target id assignment remains the same. This allows for shifts 2534 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2535 * changes to the scsi subsystem which is based on scsi host number and 2536 * target id values. Bindings are only valid during the attachment of 2537 * the scsi host. If the host detaches, then later re-attaches, target 2538 * id bindings may change. 2539 * 2540 * This routine is responsible for returning a remote port structure. 2541 * The routine will search the list of remote ports it maintains 2542 * internally on behalf of consistent target id mappings. If found, the 2543 * remote port structure will be reused. Otherwise, a new remote port 2544 * structure will be allocated. 2545 * 2546 * Whenever a remote port is allocated, a new fc_remote_port class 2547 * device is created. 2548 * 2549 * Should not be called from interrupt context. 2550 * 2551 * Notes: 2552 * This routine assumes no locks are held on entry. 2553 */ 2554struct fc_rport * 2555fc_remote_port_add(struct Scsi_Host *shost, int channel, 2556 struct fc_rport_identifiers *ids) 2557{ 2558 struct fc_internal *fci = to_fc_internal(shost->transportt); 2559 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2560 struct fc_rport *rport; 2561 unsigned long flags; 2562 int match = 0; 2563 2564 /* ensure any stgt delete functions are done */ 2565 fc_flush_work(shost); 2566 2567 /* 2568 * Search the list of "active" rports, for an rport that has been 2569 * deleted, but we've held off the real delete while the target 2570 * is in a "blocked" state. 2571 */ 2572 spin_lock_irqsave(shost->host_lock, flags); 2573 2574 list_for_each_entry(rport, &fc_host->rports, peers) { 2575 2576 if ((rport->port_state == FC_PORTSTATE_BLOCKED) && 2577 (rport->channel == channel)) { 2578 2579 switch (fc_host->tgtid_bind_type) { 2580 case FC_TGTID_BIND_BY_WWPN: 2581 case FC_TGTID_BIND_NONE: 2582 if (rport->port_name == ids->port_name) 2583 match = 1; 2584 break; 2585 case FC_TGTID_BIND_BY_WWNN: 2586 if (rport->node_name == ids->node_name) 2587 match = 1; 2588 break; 2589 case FC_TGTID_BIND_BY_ID: 2590 if (rport->port_id == ids->port_id) 2591 match = 1; 2592 break; 2593 } 2594 2595 if (match) { 2596 2597 memcpy(&rport->node_name, &ids->node_name, 2598 sizeof(rport->node_name)); 2599 memcpy(&rport->port_name, &ids->port_name, 2600 sizeof(rport->port_name)); 2601 rport->port_id = ids->port_id; 2602 2603 rport->port_state = FC_PORTSTATE_ONLINE; 2604 rport->roles = ids->roles; 2605 2606 spin_unlock_irqrestore(shost->host_lock, flags); 2607 2608 if (fci->f->dd_fcrport_size) 2609 memset(rport->dd_data, 0, 2610 fci->f->dd_fcrport_size); 2611 2612 /* 2613 * If we were not a target, cancel the 2614 * io terminate and rport timers, and 2615 * we're done. 2616 * 2617 * If we were a target, but our new role 2618 * doesn't indicate a target, leave the 2619 * timers running expecting the role to 2620 * change as the target fully logs in. If 2621 * it doesn't, the target will be torn down. 2622 * 2623 * If we were a target, and our role shows 2624 * we're still a target, cancel the timers 2625 * and kick off a scan. 2626 */ 2627 2628 /* was a target, not in roles */ 2629 if ((rport->scsi_target_id != -1) && 2630 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2631 return rport; 2632 2633 /* 2634 * Stop the fail io and dev_loss timers. 2635 * If they flush, the port_state will 2636 * be checked and will NOOP the function. 2637 */ 2638 if (!cancel_delayed_work(&rport->fail_io_work)) 2639 fc_flush_devloss(shost); 2640 if (!cancel_delayed_work(&rport->dev_loss_work)) 2641 fc_flush_devloss(shost); 2642 2643 spin_lock_irqsave(shost->host_lock, flags); 2644 2645 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2646 FC_RPORT_DEVLOSS_PENDING | 2647 FC_RPORT_DEVLOSS_CALLBK_DONE); 2648 2649 /* if target, initiate a scan */ 2650 if (rport->scsi_target_id != -1) { 2651 rport->flags |= FC_RPORT_SCAN_PENDING; 2652 scsi_queue_work(shost, 2653 &rport->scan_work); 2654 spin_unlock_irqrestore(shost->host_lock, 2655 flags); 2656 scsi_target_unblock(&rport->dev); 2657 } else 2658 spin_unlock_irqrestore(shost->host_lock, 2659 flags); 2660 2661 return rport; 2662 } 2663 } 2664 } 2665 2666 /* 2667 * Search the bindings array 2668 * Note: if never a FCP target, you won't be on this list 2669 */ 2670 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2671 2672 /* search for a matching consistent binding */ 2673 2674 list_for_each_entry(rport, &fc_host->rport_bindings, 2675 peers) { 2676 if (rport->channel != channel) 2677 continue; 2678 2679 switch (fc_host->tgtid_bind_type) { 2680 case FC_TGTID_BIND_BY_WWPN: 2681 if (rport->port_name == ids->port_name) 2682 match = 1; 2683 break; 2684 case FC_TGTID_BIND_BY_WWNN: 2685 if (rport->node_name == ids->node_name) 2686 match = 1; 2687 break; 2688 case FC_TGTID_BIND_BY_ID: 2689 if (rport->port_id == ids->port_id) 2690 match = 1; 2691 break; 2692 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2693 break; 2694 } 2695 2696 if (match) { 2697 list_move_tail(&rport->peers, &fc_host->rports); 2698 break; 2699 } 2700 } 2701 2702 if (match) { 2703 memcpy(&rport->node_name, &ids->node_name, 2704 sizeof(rport->node_name)); 2705 memcpy(&rport->port_name, &ids->port_name, 2706 sizeof(rport->port_name)); 2707 rport->port_id = ids->port_id; 2708 rport->roles = ids->roles; 2709 rport->port_state = FC_PORTSTATE_ONLINE; 2710 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2711 2712 if (fci->f->dd_fcrport_size) 2713 memset(rport->dd_data, 0, 2714 fci->f->dd_fcrport_size); 2715 2716 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2717 /* initiate a scan of the target */ 2718 rport->flags |= FC_RPORT_SCAN_PENDING; 2719 scsi_queue_work(shost, &rport->scan_work); 2720 spin_unlock_irqrestore(shost->host_lock, flags); 2721 scsi_target_unblock(&rport->dev); 2722 } else 2723 spin_unlock_irqrestore(shost->host_lock, flags); 2724 2725 return rport; 2726 } 2727 } 2728 2729 spin_unlock_irqrestore(shost->host_lock, flags); 2730 2731 /* No consistent binding found - create new remote port entry */ 2732 rport = fc_rport_create(shost, channel, ids); 2733 2734 return rport; 2735} 2736EXPORT_SYMBOL(fc_remote_port_add); 2737 2738 2739/** 2740 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2741 * @rport: The remote port that no longer exists 2742 * 2743 * The LLDD calls this routine to notify the transport that a remote 2744 * port is no longer part of the topology. Note: Although a port 2745 * may no longer be part of the topology, it may persist in the remote 2746 * ports displayed by the fc_host. We do this under 2 conditions: 2747 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2748 * This allows the port to temporarily disappear, then reappear without 2749 * disrupting the SCSI device tree attached to it. During the "blocked" 2750 * period the port will still exist. 2751 * 2) If the port was a scsi target and disappears for longer than we 2752 * expect, we'll delete the port and the tear down the SCSI device tree 2753 * attached to it. However, we want to semi-persist the target id assigned 2754 * to that port if it eventually does exist. The port structure will 2755 * remain (although with minimal information) so that the target id 2756 * bindings remails. 2757 * 2758 * If the remote port is not an FCP Target, it will be fully torn down 2759 * and deallocated, including the fc_remote_port class device. 2760 * 2761 * If the remote port is an FCP Target, the port will be placed in a 2762 * temporary blocked state. From the LLDD's perspective, the rport no 2763 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2764 * exists, but all sdevs on it are blocked from further I/O. The following 2765 * is then expected. 2766 * 2767 * If the remote port does not return (signaled by a LLDD call to 2768 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2769 * scsi target is removed - killing all outstanding i/o and removing the 2770 * scsi devices attached ot it. The port structure will be marked Not 2771 * Present and be partially cleared, leaving only enough information to 2772 * recognize the remote port relative to the scsi target id binding if 2773 * it later appears. The port will remain as long as there is a valid 2774 * binding (e.g. until the user changes the binding type or unloads the 2775 * scsi host with the binding). 2776 * 2777 * If the remote port returns within the dev_loss_tmo value (and matches 2778 * according to the target id binding type), the port structure will be 2779 * reused. If it is no longer a SCSI target, the target will be torn 2780 * down. If it continues to be a SCSI target, then the target will be 2781 * unblocked (allowing i/o to be resumed), and a scan will be activated 2782 * to ensure that all luns are detected. 2783 * 2784 * Called from normal process context only - cannot be called from interrupt. 2785 * 2786 * Notes: 2787 * This routine assumes no locks are held on entry. 2788 */ 2789void 2790fc_remote_port_delete(struct fc_rport *rport) 2791{ 2792 struct Scsi_Host *shost = rport_to_shost(rport); 2793 int timeout = rport->dev_loss_tmo; 2794 unsigned long flags; 2795 2796 /* 2797 * No need to flush the fc_host work_q's, as all adds are synchronous. 2798 * 2799 * We do need to reclaim the rport scan work element, so eventually 2800 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2801 * there's still a scan pending. 2802 */ 2803 2804 spin_lock_irqsave(shost->host_lock, flags); 2805 2806 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2807 spin_unlock_irqrestore(shost->host_lock, flags); 2808 return; 2809 } 2810 2811 /* 2812 * In the past, we if this was not an FCP-Target, we would 2813 * unconditionally just jump to deleting the rport. 2814 * However, rports can be used as node containers by the LLDD, 2815 * and its not appropriate to just terminate the rport at the 2816 * first sign of a loss in connectivity. The LLDD may want to 2817 * send ELS traffic to re-validate the login. If the rport is 2818 * immediately deleted, it makes it inappropriate for a node 2819 * container. 2820 * So... we now unconditionally wait dev_loss_tmo before 2821 * destroying an rport. 2822 */ 2823 2824 rport->port_state = FC_PORTSTATE_BLOCKED; 2825 2826 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 2827 2828 spin_unlock_irqrestore(shost->host_lock, flags); 2829 2830 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && 2831 shost->active_mode & MODE_TARGET) 2832 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); 2833 2834 scsi_target_block(&rport->dev); 2835 2836 /* see if we need to kill io faster than waiting for device loss */ 2837 if ((rport->fast_io_fail_tmo != -1) && 2838 (rport->fast_io_fail_tmo < timeout)) 2839 fc_queue_devloss_work(shost, &rport->fail_io_work, 2840 rport->fast_io_fail_tmo * HZ); 2841 2842 /* cap the length the devices can be blocked until they are deleted */ 2843 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 2844} 2845EXPORT_SYMBOL(fc_remote_port_delete); 2846 2847/** 2848 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 2849 * @rport: The remote port that changed. 2850 * @roles: New roles for this port. 2851 * 2852 * Description: The LLDD calls this routine to notify the transport that the 2853 * roles on a remote port may have changed. The largest effect of this is 2854 * if a port now becomes a FCP Target, it must be allocated a 2855 * scsi target id. If the port is no longer a FCP target, any 2856 * scsi target id value assigned to it will persist in case the 2857 * role changes back to include FCP Target. No changes in the scsi 2858 * midlayer will be invoked if the role changes (in the expectation 2859 * that the role will be resumed. If it doesn't normal error processing 2860 * will take place). 2861 * 2862 * Should not be called from interrupt context. 2863 * 2864 * Notes: 2865 * This routine assumes no locks are held on entry. 2866 */ 2867void 2868fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 2869{ 2870 struct Scsi_Host *shost = rport_to_shost(rport); 2871 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2872 unsigned long flags; 2873 int create = 0; 2874 int ret; 2875 2876 spin_lock_irqsave(shost->host_lock, flags); 2877 if (roles & FC_PORT_ROLE_FCP_TARGET) { 2878 if (rport->scsi_target_id == -1) { 2879 rport->scsi_target_id = fc_host->next_target_id++; 2880 create = 1; 2881 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 2882 create = 1; 2883 } else if (shost->active_mode & MODE_TARGET) { 2884 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, 2885 (char *)&rport->node_name); 2886 if (ret) 2887 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", 2888 ret); 2889 } 2890 2891 rport->roles = roles; 2892 2893 spin_unlock_irqrestore(shost->host_lock, flags); 2894 2895 if (create) { 2896 /* 2897 * There may have been a delete timer running on the 2898 * port. Ensure that it is cancelled as we now know 2899 * the port is an FCP Target. 2900 * Note: we know the rport is exists and in an online 2901 * state as the LLDD would not have had an rport 2902 * reference to pass us. 2903 * 2904 * Take no action on the del_timer failure as the state 2905 * machine state change will validate the 2906 * transaction. 2907 */ 2908 if (!cancel_delayed_work(&rport->fail_io_work)) 2909 fc_flush_devloss(shost); 2910 if (!cancel_delayed_work(&rport->dev_loss_work)) 2911 fc_flush_devloss(shost); 2912 2913 spin_lock_irqsave(shost->host_lock, flags); 2914 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2915 FC_RPORT_DEVLOSS_PENDING); 2916 spin_unlock_irqrestore(shost->host_lock, flags); 2917 2918 /* ensure any stgt delete functions are done */ 2919 fc_flush_work(shost); 2920 2921 /* initiate a scan of the target */ 2922 spin_lock_irqsave(shost->host_lock, flags); 2923 rport->flags |= FC_RPORT_SCAN_PENDING; 2924 scsi_queue_work(shost, &rport->scan_work); 2925 spin_unlock_irqrestore(shost->host_lock, flags); 2926 scsi_target_unblock(&rport->dev); 2927 } 2928} 2929EXPORT_SYMBOL(fc_remote_port_rolechg); 2930 2931/** 2932 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 2933 * @work: rport target that failed to reappear in the allotted time. 2934 * 2935 * Description: An attempt to delete a remote port blocks, and if it fails 2936 * to return in the allotted time this gets called. 2937 */ 2938static void 2939fc_timeout_deleted_rport(struct work_struct *work) 2940{ 2941 struct fc_rport *rport = 2942 container_of(work, struct fc_rport, dev_loss_work.work); 2943 struct Scsi_Host *shost = rport_to_shost(rport); 2944 struct fc_internal *i = to_fc_internal(shost->transportt); 2945 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2946 unsigned long flags; 2947 2948 spin_lock_irqsave(shost->host_lock, flags); 2949 2950 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2951 2952 /* 2953 * If the port is ONLINE, then it came back. If it was a SCSI 2954 * target, validate it still is. If not, tear down the 2955 * scsi_target on it. 2956 */ 2957 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 2958 (rport->scsi_target_id != -1) && 2959 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 2960 dev_printk(KERN_ERR, &rport->dev, 2961 "blocked FC remote port time out: no longer" 2962 " a FCP target, removing starget\n"); 2963 spin_unlock_irqrestore(shost->host_lock, flags); 2964 scsi_target_unblock(&rport->dev); 2965 fc_queue_work(shost, &rport->stgt_delete_work); 2966 return; 2967 } 2968 2969 /* NOOP state - we're flushing workq's */ 2970 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 2971 spin_unlock_irqrestore(shost->host_lock, flags); 2972 dev_printk(KERN_ERR, &rport->dev, 2973 "blocked FC remote port time out: leaving" 2974 " rport%s alone\n", 2975 (rport->scsi_target_id != -1) ? " and starget" : ""); 2976 return; 2977 } 2978 2979 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 2980 (rport->scsi_target_id == -1)) { 2981 list_del(&rport->peers); 2982 rport->port_state = FC_PORTSTATE_DELETED; 2983 dev_printk(KERN_ERR, &rport->dev, 2984 "blocked FC remote port time out: removing" 2985 " rport%s\n", 2986 (rport->scsi_target_id != -1) ? " and starget" : ""); 2987 fc_queue_work(shost, &rport->rport_delete_work); 2988 spin_unlock_irqrestore(shost->host_lock, flags); 2989 return; 2990 } 2991 2992 dev_printk(KERN_ERR, &rport->dev, 2993 "blocked FC remote port time out: removing target and " 2994 "saving binding\n"); 2995 2996 list_move_tail(&rport->peers, &fc_host->rport_bindings); 2997 2998 /* 2999 * Note: We do not remove or clear the hostdata area. This allows 3000 * host-specific target data to persist along with the 3001 * scsi_target_id. It's up to the host to manage it's hostdata area. 3002 */ 3003 3004 /* 3005 * Reinitialize port attributes that may change if the port comes back. 3006 */ 3007 rport->maxframe_size = -1; 3008 rport->supported_classes = FC_COS_UNSPECIFIED; 3009 rport->roles = FC_PORT_ROLE_UNKNOWN; 3010 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3011 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3012 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3013 3014 /* 3015 * Pre-emptively kill I/O rather than waiting for the work queue 3016 * item to teardown the starget. (FCOE libFC folks prefer this 3017 * and to have the rport_port_id still set when it's done). 3018 */ 3019 spin_unlock_irqrestore(shost->host_lock, flags); 3020 fc_terminate_rport_io(rport); 3021 3022 BUG_ON(rport->port_state != FC_PORTSTATE_NOTPRESENT); 3023 3024 /* remove the identifiers that aren't used in the consisting binding */ 3025 switch (fc_host->tgtid_bind_type) { 3026 case FC_TGTID_BIND_BY_WWPN: 3027 rport->node_name = -1; 3028 rport->port_id = -1; 3029 break; 3030 case FC_TGTID_BIND_BY_WWNN: 3031 rport->port_name = -1; 3032 rport->port_id = -1; 3033 break; 3034 case FC_TGTID_BIND_BY_ID: 3035 rport->node_name = -1; 3036 rport->port_name = -1; 3037 break; 3038 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3039 break; 3040 } 3041 3042 /* 3043 * As this only occurs if the remote port (scsi target) 3044 * went away and didn't come back - we'll remove 3045 * all attached scsi devices. 3046 */ 3047 fc_queue_work(shost, &rport->stgt_delete_work); 3048 3049 /* 3050 * Notify the driver that the rport is now dead. The LLDD will 3051 * also guarantee that any communication to the rport is terminated 3052 * 3053 * Note: we set the CALLBK_DONE flag above to correspond 3054 */ 3055 if (i->f->dev_loss_tmo_callbk) 3056 i->f->dev_loss_tmo_callbk(rport); 3057} 3058 3059 3060/** 3061 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3062 * @work: rport to terminate io on. 3063 * 3064 * Notes: Only requests the failure of the io, not that all are flushed 3065 * prior to returning. 3066 */ 3067static void 3068fc_timeout_fail_rport_io(struct work_struct *work) 3069{ 3070 struct fc_rport *rport = 3071 container_of(work, struct fc_rport, fail_io_work.work); 3072 3073 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3074 return; 3075 3076 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3077 fc_terminate_rport_io(rport); 3078} 3079 3080/** 3081 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3082 * @work: remote port to be scanned. 3083 */ 3084static void 3085fc_scsi_scan_rport(struct work_struct *work) 3086{ 3087 struct fc_rport *rport = 3088 container_of(work, struct fc_rport, scan_work); 3089 struct Scsi_Host *shost = rport_to_shost(rport); 3090 struct fc_internal *i = to_fc_internal(shost->transportt); 3091 unsigned long flags; 3092 3093 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3094 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3095 !(i->f->disable_target_scan)) { 3096 scsi_scan_target(&rport->dev, rport->channel, 3097 rport->scsi_target_id, SCAN_WILD_CARD, 1); 3098 } 3099 3100 spin_lock_irqsave(shost->host_lock, flags); 3101 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3102 spin_unlock_irqrestore(shost->host_lock, flags); 3103} 3104 3105 3106/** 3107 * fc_vport_setup - allocates and creates a FC virtual port. 3108 * @shost: scsi host the virtual port is connected to. 3109 * @channel: Channel on shost port connected to. 3110 * @pdev: parent device for vport 3111 * @ids: The world wide names, FC4 port roles, etc for 3112 * the virtual port. 3113 * @ret_vport: The pointer to the created vport. 3114 * 3115 * Allocates and creates the vport structure, calls the parent host 3116 * to instantiate the vport, the completes w/ class and sysfs creation. 3117 * 3118 * Notes: 3119 * This routine assumes no locks are held on entry. 3120 */ 3121static int 3122fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3123 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3124{ 3125 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3126 struct fc_internal *fci = to_fc_internal(shost->transportt); 3127 struct fc_vport *vport; 3128 struct device *dev; 3129 unsigned long flags; 3130 size_t size; 3131 int error; 3132 3133 *ret_vport = NULL; 3134 3135 if ( ! fci->f->vport_create) 3136 return -ENOENT; 3137 3138 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3139 vport = kzalloc(size, GFP_KERNEL); 3140 if (unlikely(!vport)) { 3141 printk(KERN_ERR "%s: allocation failure\n", __func__); 3142 return -ENOMEM; 3143 } 3144 3145 vport->vport_state = FC_VPORT_UNKNOWN; 3146 vport->vport_last_state = FC_VPORT_UNKNOWN; 3147 vport->node_name = ids->node_name; 3148 vport->port_name = ids->port_name; 3149 vport->roles = ids->roles; 3150 vport->vport_type = ids->vport_type; 3151 if (fci->f->dd_fcvport_size) 3152 vport->dd_data = &vport[1]; 3153 vport->shost = shost; 3154 vport->channel = channel; 3155 vport->flags = FC_VPORT_CREATING; 3156 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3157 3158 spin_lock_irqsave(shost->host_lock, flags); 3159 3160 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3161 spin_unlock_irqrestore(shost->host_lock, flags); 3162 kfree(vport); 3163 return -ENOSPC; 3164 } 3165 fc_host->npiv_vports_inuse++; 3166 vport->number = fc_host->next_vport_number++; 3167 list_add_tail(&vport->peers, &fc_host->vports); 3168 get_device(&shost->shost_gendev); /* for fc_host->vport list */ 3169 3170 spin_unlock_irqrestore(shost->host_lock, flags); 3171 3172 dev = &vport->dev; 3173 device_initialize(dev); /* takes self reference */ 3174 dev->parent = get_device(pdev); /* takes parent reference */ 3175 dev->release = fc_vport_dev_release; 3176 dev_set_name(dev, "vport-%d:%d-%d", 3177 shost->host_no, channel, vport->number); 3178 transport_setup_device(dev); 3179 3180 error = device_add(dev); 3181 if (error) { 3182 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3183 goto delete_vport; 3184 } 3185 transport_add_device(dev); 3186 transport_configure_device(dev); 3187 3188 error = fci->f->vport_create(vport, ids->disable); 3189 if (error) { 3190 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3191 goto delete_vport_all; 3192 } 3193 3194 /* 3195 * if the parent isn't the physical adapter's Scsi_Host, ensure 3196 * the Scsi_Host at least contains ia symlink to the vport. 3197 */ 3198 if (pdev != &shost->shost_gendev) { 3199 error = sysfs_create_link(&shost->shost_gendev.kobj, 3200 &dev->kobj, dev_name(dev)); 3201 if (error) 3202 printk(KERN_ERR 3203 "%s: Cannot create vport symlinks for " 3204 "%s, err=%d\n", 3205 __func__, dev_name(dev), error); 3206 } 3207 spin_lock_irqsave(shost->host_lock, flags); 3208 vport->flags &= ~FC_VPORT_CREATING; 3209 spin_unlock_irqrestore(shost->host_lock, flags); 3210 3211 dev_printk(KERN_NOTICE, pdev, 3212 "%s created via shost%d channel %d\n", dev_name(dev), 3213 shost->host_no, channel); 3214 3215 *ret_vport = vport; 3216 3217 return 0; 3218 3219delete_vport_all: 3220 transport_remove_device(dev); 3221 device_del(dev); 3222delete_vport: 3223 transport_destroy_device(dev); 3224 spin_lock_irqsave(shost->host_lock, flags); 3225 list_del(&vport->peers); 3226 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3227 fc_host->npiv_vports_inuse--; 3228 spin_unlock_irqrestore(shost->host_lock, flags); 3229 put_device(dev->parent); 3230 kfree(vport); 3231 3232 return error; 3233} 3234 3235/** 3236 * fc_vport_create - Admin App or LLDD requests creation of a vport 3237 * @shost: scsi host the virtual port is connected to. 3238 * @channel: channel on shost port connected to. 3239 * @ids: The world wide names, FC4 port roles, etc for 3240 * the virtual port. 3241 * 3242 * Notes: 3243 * This routine assumes no locks are held on entry. 3244 */ 3245struct fc_vport * 3246fc_vport_create(struct Scsi_Host *shost, int channel, 3247 struct fc_vport_identifiers *ids) 3248{ 3249 int stat; 3250 struct fc_vport *vport; 3251 3252 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3253 ids, &vport); 3254 return stat ? NULL : vport; 3255} 3256EXPORT_SYMBOL(fc_vport_create); 3257 3258/** 3259 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3260 * @vport: fc_vport to be terminated 3261 * 3262 * Calls the LLDD vport_delete() function, then deallocates and removes 3263 * the vport from the shost and object tree. 3264 * 3265 * Notes: 3266 * This routine assumes no locks are held on entry. 3267 */ 3268int 3269fc_vport_terminate(struct fc_vport *vport) 3270{ 3271 struct Scsi_Host *shost = vport_to_shost(vport); 3272 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3273 struct fc_internal *i = to_fc_internal(shost->transportt); 3274 struct device *dev = &vport->dev; 3275 unsigned long flags; 3276 int stat; 3277 3278 spin_lock_irqsave(shost->host_lock, flags); 3279 if (vport->flags & FC_VPORT_CREATING) { 3280 spin_unlock_irqrestore(shost->host_lock, flags); 3281 return -EBUSY; 3282 } 3283 if (vport->flags & (FC_VPORT_DEL)) { 3284 spin_unlock_irqrestore(shost->host_lock, flags); 3285 return -EALREADY; 3286 } 3287 vport->flags |= FC_VPORT_DELETING; 3288 spin_unlock_irqrestore(shost->host_lock, flags); 3289 3290 if (i->f->vport_delete) 3291 stat = i->f->vport_delete(vport); 3292 else 3293 stat = -ENOENT; 3294 3295 spin_lock_irqsave(shost->host_lock, flags); 3296 vport->flags &= ~FC_VPORT_DELETING; 3297 if (!stat) { 3298 vport->flags |= FC_VPORT_DELETED; 3299 list_del(&vport->peers); 3300 fc_host->npiv_vports_inuse--; 3301 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3302 } 3303 spin_unlock_irqrestore(shost->host_lock, flags); 3304 3305 if (stat) 3306 return stat; 3307 3308 if (dev->parent != &shost->shost_gendev) 3309 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3310 transport_remove_device(dev); 3311 device_del(dev); 3312 transport_destroy_device(dev); 3313 3314 /* 3315 * Removing our self-reference should mean our 3316 * release function gets called, which will drop the remaining 3317 * parent reference and free the data structure. 3318 */ 3319 put_device(dev); /* for self-reference */ 3320 3321 return 0; /* SUCCESS */ 3322} 3323EXPORT_SYMBOL(fc_vport_terminate); 3324 3325/** 3326 * fc_vport_sched_delete - workq-based delete request for a vport 3327 * @work: vport to be deleted. 3328 */ 3329static void 3330fc_vport_sched_delete(struct work_struct *work) 3331{ 3332 struct fc_vport *vport = 3333 container_of(work, struct fc_vport, vport_delete_work); 3334 int stat; 3335 3336 stat = fc_vport_terminate(vport); 3337 if (stat) 3338 dev_printk(KERN_ERR, vport->dev.parent, 3339 "%s: %s could not be deleted created via " 3340 "shost%d channel %d - error %d\n", __func__, 3341 dev_name(&vport->dev), vport->shost->host_no, 3342 vport->channel, stat); 3343} 3344 3345 3346/* Original Author: Martin Hicks */ 3347MODULE_AUTHOR("James Smart"); 3348MODULE_DESCRIPTION("FC Transport Attributes"); 3349MODULE_LICENSE("GPL"); 3350 3351module_init(fc_transport_init); 3352module_exit(fc_transport_exit); 3353