scsi_transport_fc.c revision f78badb1ae07e7f8b835ab2ea0b456ed3fc4caf4
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 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 537 GFP_KERNEL); 538 if (err && (err != -ESRCH)) /* filter no recipient errors */ 539 /* nlmsg_multicast already kfree_skb'd */ 540 goto send_fail; 541 542 return; 543 544send_fail_skb: 545 kfree_skb(skb); 546send_fail: 547 name = get_fc_host_event_code_name(event_code); 548 printk(KERN_WARNING 549 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 550 __func__, shost->host_no, 551 (name) ? name : "<unknown>", event_data, err); 552 return; 553} 554EXPORT_SYMBOL(fc_host_post_event); 555 556 557/** 558 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host 559 * @shost: host the event occurred on 560 * @event_number: fc event number obtained from get_fc_event_number() 561 * @data_len: amount, in bytes, of vendor unique data 562 * @data_buf: pointer to vendor unique data 563 * @vendor_id: Vendor id 564 * 565 * Notes: 566 * This routine assumes no locks are held on entry. 567 */ 568void 569fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 570 u32 data_len, char * data_buf, u64 vendor_id) 571{ 572 struct sk_buff *skb; 573 struct nlmsghdr *nlh; 574 struct fc_nl_event *event; 575 u32 len, skblen; 576 int err; 577 578 if (!scsi_nl_sock) { 579 err = -ENOENT; 580 goto send_vendor_fail; 581 } 582 583 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 584 skblen = NLMSG_SPACE(len); 585 586 skb = alloc_skb(skblen, GFP_KERNEL); 587 if (!skb) { 588 err = -ENOBUFS; 589 goto send_vendor_fail; 590 } 591 592 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, 593 skblen - sizeof(*nlh), 0); 594 if (!nlh) { 595 err = -ENOBUFS; 596 goto send_vendor_fail_skb; 597 } 598 event = NLMSG_DATA(nlh); 599 600 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 601 FC_NL_ASYNC_EVENT, len); 602 event->seconds = get_seconds(); 603 event->vendor_id = vendor_id; 604 event->host_no = shost->host_no; 605 event->event_datalen = data_len; /* bytes */ 606 event->event_num = event_number; 607 event->event_code = FCH_EVT_VENDOR_UNIQUE; 608 memcpy(&event->event_data, data_buf, data_len); 609 610 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 611 GFP_KERNEL); 612 if (err && (err != -ESRCH)) /* filter no recipient errors */ 613 /* nlmsg_multicast already kfree_skb'd */ 614 goto send_vendor_fail; 615 616 return; 617 618send_vendor_fail_skb: 619 kfree_skb(skb); 620send_vendor_fail: 621 printk(KERN_WARNING 622 "%s: Dropped Event : host %d vendor_unique - err %d\n", 623 __func__, shost->host_no, err); 624 return; 625} 626EXPORT_SYMBOL(fc_host_post_vendor_event); 627 628 629 630static __init int fc_transport_init(void) 631{ 632 int error; 633 634 atomic_set(&fc_event_seq, 0); 635 636 error = transport_class_register(&fc_host_class); 637 if (error) 638 return error; 639 error = transport_class_register(&fc_vport_class); 640 if (error) 641 return error; 642 error = transport_class_register(&fc_rport_class); 643 if (error) 644 return error; 645 return transport_class_register(&fc_transport_class); 646} 647 648static void __exit fc_transport_exit(void) 649{ 650 transport_class_unregister(&fc_transport_class); 651 transport_class_unregister(&fc_rport_class); 652 transport_class_unregister(&fc_host_class); 653 transport_class_unregister(&fc_vport_class); 654} 655 656/* 657 * FC Remote Port Attribute Management 658 */ 659 660#define fc_rport_show_function(field, format_string, sz, cast) \ 661static ssize_t \ 662show_fc_rport_##field (struct device *dev, \ 663 struct device_attribute *attr, char *buf) \ 664{ \ 665 struct fc_rport *rport = transport_class_to_rport(dev); \ 666 struct Scsi_Host *shost = rport_to_shost(rport); \ 667 struct fc_internal *i = to_fc_internal(shost->transportt); \ 668 if ((i->f->get_rport_##field) && \ 669 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 670 (rport->port_state == FC_PORTSTATE_DELETED) || \ 671 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 672 i->f->get_rport_##field(rport); \ 673 return snprintf(buf, sz, format_string, cast rport->field); \ 674} 675 676#define fc_rport_store_function(field) \ 677static ssize_t \ 678store_fc_rport_##field(struct device *dev, \ 679 struct device_attribute *attr, \ 680 const char *buf, size_t count) \ 681{ \ 682 int val; \ 683 struct fc_rport *rport = transport_class_to_rport(dev); \ 684 struct Scsi_Host *shost = rport_to_shost(rport); \ 685 struct fc_internal *i = to_fc_internal(shost->transportt); \ 686 char *cp; \ 687 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 688 (rport->port_state == FC_PORTSTATE_DELETED) || \ 689 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 690 return -EBUSY; \ 691 val = simple_strtoul(buf, &cp, 0); \ 692 if (*cp && (*cp != '\n')) \ 693 return -EINVAL; \ 694 i->f->set_rport_##field(rport, val); \ 695 return count; \ 696} 697 698#define fc_rport_rd_attr(field, format_string, sz) \ 699 fc_rport_show_function(field, format_string, sz, ) \ 700static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 701 show_fc_rport_##field, NULL) 702 703#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 704 fc_rport_show_function(field, format_string, sz, (cast)) \ 705static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 706 show_fc_rport_##field, NULL) 707 708#define fc_rport_rw_attr(field, format_string, sz) \ 709 fc_rport_show_function(field, format_string, sz, ) \ 710 fc_rport_store_function(field) \ 711static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 712 show_fc_rport_##field, \ 713 store_fc_rport_##field) 714 715 716#define fc_private_rport_show_function(field, format_string, sz, cast) \ 717static ssize_t \ 718show_fc_rport_##field (struct device *dev, \ 719 struct device_attribute *attr, char *buf) \ 720{ \ 721 struct fc_rport *rport = transport_class_to_rport(dev); \ 722 return snprintf(buf, sz, format_string, cast rport->field); \ 723} 724 725#define fc_private_rport_rd_attr(field, format_string, sz) \ 726 fc_private_rport_show_function(field, format_string, sz, ) \ 727static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 728 show_fc_rport_##field, NULL) 729 730#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 731 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 732static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 733 show_fc_rport_##field, NULL) 734 735 736#define fc_private_rport_rd_enum_attr(title, maxlen) \ 737static ssize_t \ 738show_fc_rport_##title (struct device *dev, \ 739 struct device_attribute *attr, char *buf) \ 740{ \ 741 struct fc_rport *rport = transport_class_to_rport(dev); \ 742 const char *name; \ 743 name = get_fc_##title##_name(rport->title); \ 744 if (!name) \ 745 return -EINVAL; \ 746 return snprintf(buf, maxlen, "%s\n", name); \ 747} \ 748static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 749 show_fc_rport_##title, NULL) 750 751 752#define SETUP_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 if (i->f->show_rport_##field) \ 758 count++ 759 760#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 761 i->private_rport_attrs[count] = device_attr_rport_##field; \ 762 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 763 i->private_rport_attrs[count].store = NULL; \ 764 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 765 count++ 766 767#define SETUP_RPORT_ATTRIBUTE_RW(field) \ 768 i->private_rport_attrs[count] = device_attr_rport_##field; \ 769 if (!i->f->set_rport_##field) { \ 770 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 771 i->private_rport_attrs[count].store = NULL; \ 772 } \ 773 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 774 if (i->f->show_rport_##field) \ 775 count++ 776 777#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 778{ \ 779 i->private_rport_attrs[count] = device_attr_rport_##field; \ 780 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 781 count++; \ 782} 783 784 785/* The FC Transport Remote Port Attributes: */ 786 787/* Fixed Remote Port Attributes */ 788 789fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 790 791static ssize_t 792show_fc_rport_supported_classes (struct device *dev, 793 struct device_attribute *attr, char *buf) 794{ 795 struct fc_rport *rport = transport_class_to_rport(dev); 796 if (rport->supported_classes == FC_COS_UNSPECIFIED) 797 return snprintf(buf, 20, "unspecified\n"); 798 return get_fc_cos_names(rport->supported_classes, buf); 799} 800static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 801 show_fc_rport_supported_classes, NULL); 802 803/* Dynamic Remote Port Attributes */ 804 805/* 806 * dev_loss_tmo attribute 807 */ 808fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 809static ssize_t 810store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 811 const char *buf, size_t count) 812{ 813 int val; 814 struct fc_rport *rport = transport_class_to_rport(dev); 815 struct Scsi_Host *shost = rport_to_shost(rport); 816 struct fc_internal *i = to_fc_internal(shost->transportt); 817 char *cp; 818 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 819 (rport->port_state == FC_PORTSTATE_DELETED) || 820 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 821 return -EBUSY; 822 val = simple_strtoul(buf, &cp, 0); 823 if ((*cp && (*cp != '\n')) || 824 (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 825 return -EINVAL; 826 i->f->set_rport_dev_loss_tmo(rport, val); 827 return count; 828} 829static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 830 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 831 832 833/* Private Remote Port Attributes */ 834 835fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 836fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 837fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 838 839static ssize_t 840show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 841 char *buf) 842{ 843 struct fc_rport *rport = transport_class_to_rport(dev); 844 845 /* identify any roles that are port_id specific */ 846 if ((rport->port_id != -1) && 847 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 848 FC_WELLKNOWN_PORTID_MASK) { 849 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 850 case FC_FPORT_PORTID: 851 return snprintf(buf, 30, "Fabric Port\n"); 852 case FC_FABCTLR_PORTID: 853 return snprintf(buf, 30, "Fabric Controller\n"); 854 case FC_DIRSRVR_PORTID: 855 return snprintf(buf, 30, "Directory Server\n"); 856 case FC_TIMESRVR_PORTID: 857 return snprintf(buf, 30, "Time Server\n"); 858 case FC_MGMTSRVR_PORTID: 859 return snprintf(buf, 30, "Management Server\n"); 860 default: 861 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 862 } 863 } else { 864 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 865 return snprintf(buf, 20, "unknown\n"); 866 return get_fc_port_roles_names(rport->roles, buf); 867 } 868} 869static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 870 show_fc_rport_roles, NULL); 871 872fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 873fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 874 875/* 876 * fast_io_fail_tmo attribute 877 */ 878static ssize_t 879show_fc_rport_fast_io_fail_tmo (struct device *dev, 880 struct device_attribute *attr, char *buf) 881{ 882 struct fc_rport *rport = transport_class_to_rport(dev); 883 884 if (rport->fast_io_fail_tmo == -1) 885 return snprintf(buf, 5, "off\n"); 886 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 887} 888 889static ssize_t 890store_fc_rport_fast_io_fail_tmo(struct device *dev, 891 struct device_attribute *attr, const char *buf, 892 size_t count) 893{ 894 int val; 895 char *cp; 896 struct fc_rport *rport = transport_class_to_rport(dev); 897 898 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 899 (rport->port_state == FC_PORTSTATE_DELETED) || 900 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 901 return -EBUSY; 902 if (strncmp(buf, "off", 3) == 0) 903 rport->fast_io_fail_tmo = -1; 904 else { 905 val = simple_strtoul(buf, &cp, 0); 906 if ((*cp && (*cp != '\n')) || 907 (val < 0) || (val >= rport->dev_loss_tmo)) 908 return -EINVAL; 909 rport->fast_io_fail_tmo = val; 910 } 911 return count; 912} 913static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 914 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 915 916 917/* 918 * FC SCSI Target Attribute Management 919 */ 920 921/* 922 * Note: in the target show function we recognize when the remote 923 * port is in the heirarchy and do not allow the driver to get 924 * involved in sysfs functions. The driver only gets involved if 925 * it's the "old" style that doesn't use rports. 926 */ 927#define fc_starget_show_function(field, format_string, sz, cast) \ 928static ssize_t \ 929show_fc_starget_##field (struct device *dev, \ 930 struct device_attribute *attr, char *buf) \ 931{ \ 932 struct scsi_target *starget = transport_class_to_starget(dev); \ 933 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 934 struct fc_internal *i = to_fc_internal(shost->transportt); \ 935 struct fc_rport *rport = starget_to_rport(starget); \ 936 if (rport) \ 937 fc_starget_##field(starget) = rport->field; \ 938 else if (i->f->get_starget_##field) \ 939 i->f->get_starget_##field(starget); \ 940 return snprintf(buf, sz, format_string, \ 941 cast fc_starget_##field(starget)); \ 942} 943 944#define fc_starget_rd_attr(field, format_string, sz) \ 945 fc_starget_show_function(field, format_string, sz, ) \ 946static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 947 show_fc_starget_##field, NULL) 948 949#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 950 fc_starget_show_function(field, format_string, sz, (cast)) \ 951static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 952 show_fc_starget_##field, NULL) 953 954#define SETUP_STARGET_ATTRIBUTE_RD(field) \ 955 i->private_starget_attrs[count] = device_attr_starget_##field; \ 956 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 957 i->private_starget_attrs[count].store = NULL; \ 958 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 959 if (i->f->show_starget_##field) \ 960 count++ 961 962#define SETUP_STARGET_ATTRIBUTE_RW(field) \ 963 i->private_starget_attrs[count] = device_attr_starget_##field; \ 964 if (!i->f->set_starget_##field) { \ 965 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 966 i->private_starget_attrs[count].store = NULL; \ 967 } \ 968 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 969 if (i->f->show_starget_##field) \ 970 count++ 971 972/* The FC Transport SCSI Target Attributes: */ 973fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 974fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 975fc_starget_rd_attr(port_id, "0x%06x\n", 20); 976 977 978/* 979 * FC Virtual Port Attribute Management 980 */ 981 982#define fc_vport_show_function(field, format_string, sz, cast) \ 983static ssize_t \ 984show_fc_vport_##field (struct device *dev, \ 985 struct device_attribute *attr, char *buf) \ 986{ \ 987 struct fc_vport *vport = transport_class_to_vport(dev); \ 988 struct Scsi_Host *shost = vport_to_shost(vport); \ 989 struct fc_internal *i = to_fc_internal(shost->transportt); \ 990 if ((i->f->get_vport_##field) && \ 991 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 992 i->f->get_vport_##field(vport); \ 993 return snprintf(buf, sz, format_string, cast vport->field); \ 994} 995 996#define fc_vport_store_function(field) \ 997static ssize_t \ 998store_fc_vport_##field(struct device *dev, \ 999 struct device_attribute *attr, \ 1000 const char *buf, size_t count) \ 1001{ \ 1002 int val; \ 1003 struct fc_vport *vport = transport_class_to_vport(dev); \ 1004 struct Scsi_Host *shost = vport_to_shost(vport); \ 1005 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1006 char *cp; \ 1007 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1008 return -EBUSY; \ 1009 val = simple_strtoul(buf, &cp, 0); \ 1010 if (*cp && (*cp != '\n')) \ 1011 return -EINVAL; \ 1012 i->f->set_vport_##field(vport, val); \ 1013 return count; \ 1014} 1015 1016#define fc_vport_store_str_function(field, slen) \ 1017static ssize_t \ 1018store_fc_vport_##field(struct device *dev, \ 1019 struct device_attribute *attr, \ 1020 const char *buf, size_t count) \ 1021{ \ 1022 struct fc_vport *vport = transport_class_to_vport(dev); \ 1023 struct Scsi_Host *shost = vport_to_shost(vport); \ 1024 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1025 unsigned int cnt=count; \ 1026 \ 1027 /* count may include a LF at end of string */ \ 1028 if (buf[cnt-1] == '\n') \ 1029 cnt--; \ 1030 if (cnt > ((slen) - 1)) \ 1031 return -EINVAL; \ 1032 memcpy(vport->field, buf, cnt); \ 1033 i->f->set_vport_##field(vport); \ 1034 return count; \ 1035} 1036 1037#define fc_vport_rd_attr(field, format_string, sz) \ 1038 fc_vport_show_function(field, format_string, sz, ) \ 1039static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1040 show_fc_vport_##field, NULL) 1041 1042#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1043 fc_vport_show_function(field, format_string, sz, (cast)) \ 1044static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1045 show_fc_vport_##field, NULL) 1046 1047#define fc_vport_rw_attr(field, format_string, sz) \ 1048 fc_vport_show_function(field, format_string, sz, ) \ 1049 fc_vport_store_function(field) \ 1050static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1051 show_fc_vport_##field, \ 1052 store_fc_vport_##field) 1053 1054#define fc_private_vport_show_function(field, format_string, sz, cast) \ 1055static ssize_t \ 1056show_fc_vport_##field (struct device *dev, \ 1057 struct device_attribute *attr, char *buf) \ 1058{ \ 1059 struct fc_vport *vport = transport_class_to_vport(dev); \ 1060 return snprintf(buf, sz, format_string, cast vport->field); \ 1061} 1062 1063#define fc_private_vport_store_u32_function(field) \ 1064static ssize_t \ 1065store_fc_vport_##field(struct device *dev, \ 1066 struct device_attribute *attr, \ 1067 const char *buf, size_t count) \ 1068{ \ 1069 u32 val; \ 1070 struct fc_vport *vport = transport_class_to_vport(dev); \ 1071 char *cp; \ 1072 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1073 return -EBUSY; \ 1074 val = simple_strtoul(buf, &cp, 0); \ 1075 if (*cp && (*cp != '\n')) \ 1076 return -EINVAL; \ 1077 vport->field = val; \ 1078 return count; \ 1079} 1080 1081 1082#define fc_private_vport_rd_attr(field, format_string, sz) \ 1083 fc_private_vport_show_function(field, format_string, sz, ) \ 1084static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1085 show_fc_vport_##field, NULL) 1086 1087#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1088 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1089static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1090 show_fc_vport_##field, NULL) 1091 1092#define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1093 fc_private_vport_show_function(field, format_string, sz, ) \ 1094 fc_private_vport_store_u32_function(field) \ 1095static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1096 show_fc_vport_##field, \ 1097 store_fc_vport_##field) 1098 1099 1100#define fc_private_vport_rd_enum_attr(title, maxlen) \ 1101static ssize_t \ 1102show_fc_vport_##title (struct device *dev, \ 1103 struct device_attribute *attr, \ 1104 char *buf) \ 1105{ \ 1106 struct fc_vport *vport = transport_class_to_vport(dev); \ 1107 const char *name; \ 1108 name = get_fc_##title##_name(vport->title); \ 1109 if (!name) \ 1110 return -EINVAL; \ 1111 return snprintf(buf, maxlen, "%s\n", name); \ 1112} \ 1113static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1114 show_fc_vport_##title, NULL) 1115 1116 1117#define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1118 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1119 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1120 i->private_vport_attrs[count].store = NULL; \ 1121 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1122 if (i->f->get_##field) \ 1123 count++ 1124 /* NOTE: Above MACRO differs: checks function not show bit */ 1125 1126#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1127 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1128 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1129 i->private_vport_attrs[count].store = NULL; \ 1130 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1131 count++ 1132 1133#define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1134 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1135 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1136 if (i->f->field) \ 1137 count++ 1138 /* NOTE: Above MACRO differs: checks function */ 1139 1140#define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1141 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1142 if (!i->f->set_vport_##field) { \ 1143 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1144 i->private_vport_attrs[count].store = NULL; \ 1145 } \ 1146 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1147 count++ 1148 /* NOTE: Above MACRO differs: does not check show bit */ 1149 1150#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1151{ \ 1152 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1153 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1154 count++; \ 1155} 1156 1157 1158/* The FC Transport Virtual Port Attributes: */ 1159 1160/* Fixed Virtual Port Attributes */ 1161 1162/* Dynamic Virtual Port Attributes */ 1163 1164/* Private Virtual Port Attributes */ 1165 1166fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1167fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1168fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1169fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1170 1171static ssize_t 1172show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1173 char *buf) 1174{ 1175 struct fc_vport *vport = transport_class_to_vport(dev); 1176 1177 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1178 return snprintf(buf, 20, "unknown\n"); 1179 return get_fc_port_roles_names(vport->roles, buf); 1180} 1181static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1182 1183fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1184 1185fc_private_vport_show_function(symbolic_name, "%s\n", 1186 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1187fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1188static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1189 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1190 1191static ssize_t 1192store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1193 const char *buf, size_t count) 1194{ 1195 struct fc_vport *vport = transport_class_to_vport(dev); 1196 struct Scsi_Host *shost = vport_to_shost(vport); 1197 1198 fc_queue_work(shost, &vport->vport_delete_work); 1199 return count; 1200} 1201static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1202 NULL, store_fc_vport_delete); 1203 1204 1205/* 1206 * Enable/Disable vport 1207 * Write "1" to disable, write "0" to enable 1208 */ 1209static ssize_t 1210store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1211 const char *buf, 1212 size_t count) 1213{ 1214 struct fc_vport *vport = transport_class_to_vport(dev); 1215 struct Scsi_Host *shost = vport_to_shost(vport); 1216 struct fc_internal *i = to_fc_internal(shost->transportt); 1217 int stat; 1218 1219 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1220 return -EBUSY; 1221 1222 if (*buf == '0') { 1223 if (vport->vport_state != FC_VPORT_DISABLED) 1224 return -EALREADY; 1225 } else if (*buf == '1') { 1226 if (vport->vport_state == FC_VPORT_DISABLED) 1227 return -EALREADY; 1228 } else 1229 return -EINVAL; 1230 1231 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1232 return stat ? stat : count; 1233} 1234static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1235 NULL, store_fc_vport_disable); 1236 1237 1238/* 1239 * Host Attribute Management 1240 */ 1241 1242#define fc_host_show_function(field, format_string, sz, cast) \ 1243static ssize_t \ 1244show_fc_host_##field (struct device *dev, \ 1245 struct device_attribute *attr, char *buf) \ 1246{ \ 1247 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1248 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1249 if (i->f->get_host_##field) \ 1250 i->f->get_host_##field(shost); \ 1251 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1252} 1253 1254#define fc_host_store_function(field) \ 1255static ssize_t \ 1256store_fc_host_##field(struct device *dev, \ 1257 struct device_attribute *attr, \ 1258 const char *buf, size_t count) \ 1259{ \ 1260 int val; \ 1261 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1262 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1263 char *cp; \ 1264 \ 1265 val = simple_strtoul(buf, &cp, 0); \ 1266 if (*cp && (*cp != '\n')) \ 1267 return -EINVAL; \ 1268 i->f->set_host_##field(shost, val); \ 1269 return count; \ 1270} 1271 1272#define fc_host_store_str_function(field, slen) \ 1273static ssize_t \ 1274store_fc_host_##field(struct device *dev, \ 1275 struct device_attribute *attr, \ 1276 const char *buf, size_t count) \ 1277{ \ 1278 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1279 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1280 unsigned int cnt=count; \ 1281 \ 1282 /* count may include a LF at end of string */ \ 1283 if (buf[cnt-1] == '\n') \ 1284 cnt--; \ 1285 if (cnt > ((slen) - 1)) \ 1286 return -EINVAL; \ 1287 memcpy(fc_host_##field(shost), buf, cnt); \ 1288 i->f->set_host_##field(shost); \ 1289 return count; \ 1290} 1291 1292#define fc_host_rd_attr(field, format_string, sz) \ 1293 fc_host_show_function(field, format_string, sz, ) \ 1294static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1295 show_fc_host_##field, NULL) 1296 1297#define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1298 fc_host_show_function(field, format_string, sz, (cast)) \ 1299static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1300 show_fc_host_##field, NULL) 1301 1302#define fc_host_rw_attr(field, format_string, sz) \ 1303 fc_host_show_function(field, format_string, sz, ) \ 1304 fc_host_store_function(field) \ 1305static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1306 show_fc_host_##field, \ 1307 store_fc_host_##field) 1308 1309#define fc_host_rd_enum_attr(title, maxlen) \ 1310static ssize_t \ 1311show_fc_host_##title (struct device *dev, \ 1312 struct device_attribute *attr, char *buf) \ 1313{ \ 1314 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1315 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1316 const char *name; \ 1317 if (i->f->get_host_##title) \ 1318 i->f->get_host_##title(shost); \ 1319 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1320 if (!name) \ 1321 return -EINVAL; \ 1322 return snprintf(buf, maxlen, "%s\n", name); \ 1323} \ 1324static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1325 1326#define SETUP_HOST_ATTRIBUTE_RD(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 if (i->f->show_host_##field) \ 1332 count++ 1333 1334#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1335 i->private_host_attrs[count] = device_attr_host_##field; \ 1336 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1337 i->private_host_attrs[count].store = NULL; \ 1338 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1339 count++ 1340 1341#define SETUP_HOST_ATTRIBUTE_RW(field) \ 1342 i->private_host_attrs[count] = device_attr_host_##field; \ 1343 if (!i->f->set_host_##field) { \ 1344 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1345 i->private_host_attrs[count].store = NULL; \ 1346 } \ 1347 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1348 if (i->f->show_host_##field) \ 1349 count++ 1350 1351 1352#define fc_private_host_show_function(field, format_string, sz, cast) \ 1353static ssize_t \ 1354show_fc_host_##field (struct device *dev, \ 1355 struct device_attribute *attr, char *buf) \ 1356{ \ 1357 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1358 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1359} 1360 1361#define fc_private_host_rd_attr(field, format_string, sz) \ 1362 fc_private_host_show_function(field, format_string, sz, ) \ 1363static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1364 show_fc_host_##field, NULL) 1365 1366#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1367 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1368static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1369 show_fc_host_##field, NULL) 1370 1371#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1372 i->private_host_attrs[count] = device_attr_host_##field; \ 1373 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1374 i->private_host_attrs[count].store = NULL; \ 1375 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1376 count++ 1377 1378#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1379{ \ 1380 i->private_host_attrs[count] = device_attr_host_##field; \ 1381 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1382 count++; \ 1383} 1384 1385 1386/* Fixed Host Attributes */ 1387 1388static ssize_t 1389show_fc_host_supported_classes (struct device *dev, 1390 struct device_attribute *attr, char *buf) 1391{ 1392 struct Scsi_Host *shost = transport_class_to_shost(dev); 1393 1394 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1395 return snprintf(buf, 20, "unspecified\n"); 1396 1397 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1398} 1399static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1400 show_fc_host_supported_classes, NULL); 1401 1402static ssize_t 1403show_fc_host_supported_fc4s (struct device *dev, 1404 struct device_attribute *attr, char *buf) 1405{ 1406 struct Scsi_Host *shost = transport_class_to_shost(dev); 1407 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1408} 1409static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1410 show_fc_host_supported_fc4s, NULL); 1411 1412static ssize_t 1413show_fc_host_supported_speeds (struct device *dev, 1414 struct device_attribute *attr, char *buf) 1415{ 1416 struct Scsi_Host *shost = transport_class_to_shost(dev); 1417 1418 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1419 return snprintf(buf, 20, "unknown\n"); 1420 1421 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1422} 1423static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1424 show_fc_host_supported_speeds, NULL); 1425 1426 1427fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1428fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1429fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1430 unsigned long long); 1431fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1432fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1433fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1434 1435 1436/* Dynamic Host Attributes */ 1437 1438static ssize_t 1439show_fc_host_active_fc4s (struct device *dev, 1440 struct device_attribute *attr, char *buf) 1441{ 1442 struct Scsi_Host *shost = transport_class_to_shost(dev); 1443 struct fc_internal *i = to_fc_internal(shost->transportt); 1444 1445 if (i->f->get_host_active_fc4s) 1446 i->f->get_host_active_fc4s(shost); 1447 1448 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1449} 1450static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1451 show_fc_host_active_fc4s, NULL); 1452 1453static ssize_t 1454show_fc_host_speed (struct device *dev, 1455 struct device_attribute *attr, char *buf) 1456{ 1457 struct Scsi_Host *shost = transport_class_to_shost(dev); 1458 struct fc_internal *i = to_fc_internal(shost->transportt); 1459 1460 if (i->f->get_host_speed) 1461 i->f->get_host_speed(shost); 1462 1463 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1464 return snprintf(buf, 20, "unknown\n"); 1465 1466 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1467} 1468static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1469 show_fc_host_speed, NULL); 1470 1471 1472fc_host_rd_attr(port_id, "0x%06x\n", 20); 1473fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1474fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1475fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1476fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1477 1478fc_private_host_show_function(system_hostname, "%s\n", 1479 FC_SYMBOLIC_NAME_SIZE + 1, ) 1480fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1481static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1482 show_fc_host_system_hostname, store_fc_host_system_hostname); 1483 1484 1485/* Private Host Attributes */ 1486 1487static ssize_t 1488show_fc_private_host_tgtid_bind_type(struct device *dev, 1489 struct device_attribute *attr, char *buf) 1490{ 1491 struct Scsi_Host *shost = transport_class_to_shost(dev); 1492 const char *name; 1493 1494 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1495 if (!name) 1496 return -EINVAL; 1497 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1498} 1499 1500#define get_list_head_entry(pos, head, member) \ 1501 pos = list_entry((head)->next, typeof(*pos), member) 1502 1503static ssize_t 1504store_fc_private_host_tgtid_bind_type(struct device *dev, 1505 struct device_attribute *attr, const char *buf, size_t count) 1506{ 1507 struct Scsi_Host *shost = transport_class_to_shost(dev); 1508 struct fc_rport *rport; 1509 enum fc_tgtid_binding_type val; 1510 unsigned long flags; 1511 1512 if (get_fc_tgtid_bind_type_match(buf, &val)) 1513 return -EINVAL; 1514 1515 /* if changing bind type, purge all unused consistent bindings */ 1516 if (val != fc_host_tgtid_bind_type(shost)) { 1517 spin_lock_irqsave(shost->host_lock, flags); 1518 while (!list_empty(&fc_host_rport_bindings(shost))) { 1519 get_list_head_entry(rport, 1520 &fc_host_rport_bindings(shost), peers); 1521 list_del(&rport->peers); 1522 rport->port_state = FC_PORTSTATE_DELETED; 1523 fc_queue_work(shost, &rport->rport_delete_work); 1524 } 1525 spin_unlock_irqrestore(shost->host_lock, flags); 1526 } 1527 1528 fc_host_tgtid_bind_type(shost) = val; 1529 return count; 1530} 1531 1532static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1533 show_fc_private_host_tgtid_bind_type, 1534 store_fc_private_host_tgtid_bind_type); 1535 1536static ssize_t 1537store_fc_private_host_issue_lip(struct device *dev, 1538 struct device_attribute *attr, const char *buf, size_t count) 1539{ 1540 struct Scsi_Host *shost = transport_class_to_shost(dev); 1541 struct fc_internal *i = to_fc_internal(shost->transportt); 1542 int ret; 1543 1544 /* ignore any data value written to the attribute */ 1545 if (i->f->issue_fc_host_lip) { 1546 ret = i->f->issue_fc_host_lip(shost); 1547 return ret ? ret: count; 1548 } 1549 1550 return -ENOENT; 1551} 1552 1553static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1554 store_fc_private_host_issue_lip); 1555 1556fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1557 1558 1559/* 1560 * Host Statistics Management 1561 */ 1562 1563/* Show a given an attribute in the statistics group */ 1564static ssize_t 1565fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1566{ 1567 struct Scsi_Host *shost = transport_class_to_shost(dev); 1568 struct fc_internal *i = to_fc_internal(shost->transportt); 1569 struct fc_host_statistics *stats; 1570 ssize_t ret = -ENOENT; 1571 1572 if (offset > sizeof(struct fc_host_statistics) || 1573 offset % sizeof(u64) != 0) 1574 WARN_ON(1); 1575 1576 if (i->f->get_fc_host_stats) { 1577 stats = (i->f->get_fc_host_stats)(shost); 1578 if (stats) 1579 ret = snprintf(buf, 20, "0x%llx\n", 1580 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1581 } 1582 return ret; 1583} 1584 1585 1586/* generate a read-only statistics attribute */ 1587#define fc_host_statistic(name) \ 1588static ssize_t show_fcstat_##name(struct device *cd, \ 1589 struct device_attribute *attr, \ 1590 char *buf) \ 1591{ \ 1592 return fc_stat_show(cd, buf, \ 1593 offsetof(struct fc_host_statistics, name)); \ 1594} \ 1595static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1596 1597fc_host_statistic(seconds_since_last_reset); 1598fc_host_statistic(tx_frames); 1599fc_host_statistic(tx_words); 1600fc_host_statistic(rx_frames); 1601fc_host_statistic(rx_words); 1602fc_host_statistic(lip_count); 1603fc_host_statistic(nos_count); 1604fc_host_statistic(error_frames); 1605fc_host_statistic(dumped_frames); 1606fc_host_statistic(link_failure_count); 1607fc_host_statistic(loss_of_sync_count); 1608fc_host_statistic(loss_of_signal_count); 1609fc_host_statistic(prim_seq_protocol_err_count); 1610fc_host_statistic(invalid_tx_word_count); 1611fc_host_statistic(invalid_crc_count); 1612fc_host_statistic(fcp_input_requests); 1613fc_host_statistic(fcp_output_requests); 1614fc_host_statistic(fcp_control_requests); 1615fc_host_statistic(fcp_input_megabytes); 1616fc_host_statistic(fcp_output_megabytes); 1617 1618static ssize_t 1619fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1620 const char *buf, size_t count) 1621{ 1622 struct Scsi_Host *shost = transport_class_to_shost(dev); 1623 struct fc_internal *i = to_fc_internal(shost->transportt); 1624 1625 /* ignore any data value written to the attribute */ 1626 if (i->f->reset_fc_host_stats) { 1627 i->f->reset_fc_host_stats(shost); 1628 return count; 1629 } 1630 1631 return -ENOENT; 1632} 1633static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1634 fc_reset_statistics); 1635 1636static struct attribute *fc_statistics_attrs[] = { 1637 &device_attr_host_seconds_since_last_reset.attr, 1638 &device_attr_host_tx_frames.attr, 1639 &device_attr_host_tx_words.attr, 1640 &device_attr_host_rx_frames.attr, 1641 &device_attr_host_rx_words.attr, 1642 &device_attr_host_lip_count.attr, 1643 &device_attr_host_nos_count.attr, 1644 &device_attr_host_error_frames.attr, 1645 &device_attr_host_dumped_frames.attr, 1646 &device_attr_host_link_failure_count.attr, 1647 &device_attr_host_loss_of_sync_count.attr, 1648 &device_attr_host_loss_of_signal_count.attr, 1649 &device_attr_host_prim_seq_protocol_err_count.attr, 1650 &device_attr_host_invalid_tx_word_count.attr, 1651 &device_attr_host_invalid_crc_count.attr, 1652 &device_attr_host_fcp_input_requests.attr, 1653 &device_attr_host_fcp_output_requests.attr, 1654 &device_attr_host_fcp_control_requests.attr, 1655 &device_attr_host_fcp_input_megabytes.attr, 1656 &device_attr_host_fcp_output_megabytes.attr, 1657 &device_attr_host_reset_statistics.attr, 1658 NULL 1659}; 1660 1661static struct attribute_group fc_statistics_group = { 1662 .name = "statistics", 1663 .attrs = fc_statistics_attrs, 1664}; 1665 1666 1667/* Host Vport Attributes */ 1668 1669static int 1670fc_parse_wwn(const char *ns, u64 *nm) 1671{ 1672 unsigned int i, j; 1673 u8 wwn[8]; 1674 1675 memset(wwn, 0, sizeof(wwn)); 1676 1677 /* Validate and store the new name */ 1678 for (i=0, j=0; i < 16; i++) { 1679 if ((*ns >= 'a') && (*ns <= 'f')) 1680 j = ((j << 4) | ((*ns++ -'a') + 10)); 1681 else if ((*ns >= 'A') && (*ns <= 'F')) 1682 j = ((j << 4) | ((*ns++ -'A') + 10)); 1683 else if ((*ns >= '0') && (*ns <= '9')) 1684 j = ((j << 4) | (*ns++ -'0')); 1685 else 1686 return -EINVAL; 1687 if (i % 2) { 1688 wwn[i/2] = j & 0xff; 1689 j = 0; 1690 } 1691 } 1692 1693 *nm = wwn_to_u64(wwn); 1694 1695 return 0; 1696} 1697 1698 1699/* 1700 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1701 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1702 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1703 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1704 */ 1705static ssize_t 1706store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1707 const char *buf, size_t count) 1708{ 1709 struct Scsi_Host *shost = transport_class_to_shost(dev); 1710 struct fc_vport_identifiers vid; 1711 struct fc_vport *vport; 1712 unsigned int cnt=count; 1713 int stat; 1714 1715 memset(&vid, 0, sizeof(vid)); 1716 1717 /* count may include a LF at end of string */ 1718 if (buf[cnt-1] == '\n') 1719 cnt--; 1720 1721 /* validate we have enough characters for WWPN */ 1722 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1723 return -EINVAL; 1724 1725 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1726 if (stat) 1727 return stat; 1728 1729 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1730 if (stat) 1731 return stat; 1732 1733 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1734 vid.vport_type = FC_PORTTYPE_NPIV; 1735 /* vid.symbolic_name is already zero/NULL's */ 1736 vid.disable = false; /* always enabled */ 1737 1738 /* we only allow support on Channel 0 !!! */ 1739 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1740 return stat ? stat : count; 1741} 1742static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1743 store_fc_host_vport_create); 1744 1745 1746/* 1747 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1748 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1749 * The WWNs are specified as hex characters, and may *not* contain 1750 * any prefixes (e.g. 0x, x, etc) 1751 */ 1752static ssize_t 1753store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1754 const char *buf, size_t count) 1755{ 1756 struct Scsi_Host *shost = transport_class_to_shost(dev); 1757 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1758 struct fc_vport *vport; 1759 u64 wwpn, wwnn; 1760 unsigned long flags; 1761 unsigned int cnt=count; 1762 int stat, match; 1763 1764 /* count may include a LF at end of string */ 1765 if (buf[cnt-1] == '\n') 1766 cnt--; 1767 1768 /* validate we have enough characters for WWPN */ 1769 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1770 return -EINVAL; 1771 1772 stat = fc_parse_wwn(&buf[0], &wwpn); 1773 if (stat) 1774 return stat; 1775 1776 stat = fc_parse_wwn(&buf[17], &wwnn); 1777 if (stat) 1778 return stat; 1779 1780 spin_lock_irqsave(shost->host_lock, flags); 1781 match = 0; 1782 /* we only allow support on Channel 0 !!! */ 1783 list_for_each_entry(vport, &fc_host->vports, peers) { 1784 if ((vport->channel == 0) && 1785 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1786 match = 1; 1787 break; 1788 } 1789 } 1790 spin_unlock_irqrestore(shost->host_lock, flags); 1791 1792 if (!match) 1793 return -ENODEV; 1794 1795 stat = fc_vport_terminate(vport); 1796 return stat ? stat : count; 1797} 1798static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1799 store_fc_host_vport_delete); 1800 1801 1802static int fc_host_match(struct attribute_container *cont, 1803 struct device *dev) 1804{ 1805 struct Scsi_Host *shost; 1806 struct fc_internal *i; 1807 1808 if (!scsi_is_host_device(dev)) 1809 return 0; 1810 1811 shost = dev_to_shost(dev); 1812 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1813 != &fc_host_class.class) 1814 return 0; 1815 1816 i = to_fc_internal(shost->transportt); 1817 1818 return &i->t.host_attrs.ac == cont; 1819} 1820 1821static int fc_target_match(struct attribute_container *cont, 1822 struct device *dev) 1823{ 1824 struct Scsi_Host *shost; 1825 struct fc_internal *i; 1826 1827 if (!scsi_is_target_device(dev)) 1828 return 0; 1829 1830 shost = dev_to_shost(dev->parent); 1831 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1832 != &fc_host_class.class) 1833 return 0; 1834 1835 i = to_fc_internal(shost->transportt); 1836 1837 return &i->t.target_attrs.ac == cont; 1838} 1839 1840static void fc_rport_dev_release(struct device *dev) 1841{ 1842 struct fc_rport *rport = dev_to_rport(dev); 1843 put_device(dev->parent); 1844 kfree(rport); 1845} 1846 1847int scsi_is_fc_rport(const struct device *dev) 1848{ 1849 return dev->release == fc_rport_dev_release; 1850} 1851EXPORT_SYMBOL(scsi_is_fc_rport); 1852 1853static int fc_rport_match(struct attribute_container *cont, 1854 struct device *dev) 1855{ 1856 struct Scsi_Host *shost; 1857 struct fc_internal *i; 1858 1859 if (!scsi_is_fc_rport(dev)) 1860 return 0; 1861 1862 shost = dev_to_shost(dev->parent); 1863 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1864 != &fc_host_class.class) 1865 return 0; 1866 1867 i = to_fc_internal(shost->transportt); 1868 1869 return &i->rport_attr_cont.ac == cont; 1870} 1871 1872 1873static void fc_vport_dev_release(struct device *dev) 1874{ 1875 struct fc_vport *vport = dev_to_vport(dev); 1876 put_device(dev->parent); /* release kobj parent */ 1877 kfree(vport); 1878} 1879 1880int scsi_is_fc_vport(const struct device *dev) 1881{ 1882 return dev->release == fc_vport_dev_release; 1883} 1884EXPORT_SYMBOL(scsi_is_fc_vport); 1885 1886static int fc_vport_match(struct attribute_container *cont, 1887 struct device *dev) 1888{ 1889 struct fc_vport *vport; 1890 struct Scsi_Host *shost; 1891 struct fc_internal *i; 1892 1893 if (!scsi_is_fc_vport(dev)) 1894 return 0; 1895 vport = dev_to_vport(dev); 1896 1897 shost = vport_to_shost(vport); 1898 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1899 != &fc_host_class.class) 1900 return 0; 1901 1902 i = to_fc_internal(shost->transportt); 1903 return &i->vport_attr_cont.ac == cont; 1904} 1905 1906 1907/** 1908 * fc_timed_out - FC Transport I/O timeout intercept handler 1909 * @scmd: The SCSI command which timed out 1910 * 1911 * This routine protects against error handlers getting invoked while a 1912 * rport is in a blocked state, typically due to a temporarily loss of 1913 * connectivity. If the error handlers are allowed to proceed, requests 1914 * to abort i/o, reset the target, etc will likely fail as there is no way 1915 * to communicate with the device to perform the requested function. These 1916 * failures may result in the midlayer taking the device offline, requiring 1917 * manual intervention to restore operation. 1918 * 1919 * This routine, called whenever an i/o times out, validates the state of 1920 * the underlying rport. If the rport is blocked, it returns 1921 * EH_RESET_TIMER, which will continue to reschedule the timeout. 1922 * Eventually, either the device will return, or devloss_tmo will fire, 1923 * and when the timeout then fires, it will be handled normally. 1924 * If the rport is not blocked, normal error handling continues. 1925 * 1926 * Notes: 1927 * This routine assumes no locks are held on entry. 1928 */ 1929static enum blk_eh_timer_return 1930fc_timed_out(struct scsi_cmnd *scmd) 1931{ 1932 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 1933 1934 if (rport->port_state == FC_PORTSTATE_BLOCKED) 1935 return BLK_EH_RESET_TIMER; 1936 1937 return BLK_EH_NOT_HANDLED; 1938} 1939 1940/* 1941 * Called by fc_user_scan to locate an rport on the shost that 1942 * matches the channel and target id, and invoke scsi_scan_target() 1943 * on the rport. 1944 */ 1945static void 1946fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) 1947{ 1948 struct fc_rport *rport; 1949 unsigned long flags; 1950 1951 spin_lock_irqsave(shost->host_lock, flags); 1952 1953 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 1954 if (rport->scsi_target_id == -1) 1955 continue; 1956 1957 if (rport->port_state != FC_PORTSTATE_ONLINE) 1958 continue; 1959 1960 if ((channel == rport->channel) && 1961 (id == rport->scsi_target_id)) { 1962 spin_unlock_irqrestore(shost->host_lock, flags); 1963 scsi_scan_target(&rport->dev, channel, id, lun, 1); 1964 return; 1965 } 1966 } 1967 1968 spin_unlock_irqrestore(shost->host_lock, flags); 1969} 1970 1971/* 1972 * Called via sysfs scan routines. Necessary, as the FC transport 1973 * wants to place all target objects below the rport object. So this 1974 * routine must invoke the scsi_scan_target() routine with the rport 1975 * object as the parent. 1976 */ 1977static int 1978fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) 1979{ 1980 uint chlo, chhi; 1981 uint tgtlo, tgthi; 1982 1983 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 1984 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 1985 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 1986 return -EINVAL; 1987 1988 if (channel == SCAN_WILD_CARD) { 1989 chlo = 0; 1990 chhi = shost->max_channel + 1; 1991 } else { 1992 chlo = channel; 1993 chhi = channel + 1; 1994 } 1995 1996 if (id == SCAN_WILD_CARD) { 1997 tgtlo = 0; 1998 tgthi = shost->max_id; 1999 } else { 2000 tgtlo = id; 2001 tgthi = id + 1; 2002 } 2003 2004 for ( ; chlo < chhi; chlo++) 2005 for ( ; tgtlo < tgthi; tgtlo++) 2006 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2007 2008 return 0; 2009} 2010 2011static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, 2012 int result) 2013{ 2014 struct fc_internal *i = to_fc_internal(shost->transportt); 2015 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); 2016} 2017 2018static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) 2019{ 2020 struct fc_internal *i = to_fc_internal(shost->transportt); 2021 return i->f->it_nexus_response(shost, nexus, result); 2022} 2023 2024struct scsi_transport_template * 2025fc_attach_transport(struct fc_function_template *ft) 2026{ 2027 int count; 2028 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2029 GFP_KERNEL); 2030 2031 if (unlikely(!i)) 2032 return NULL; 2033 2034 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2035 i->t.target_attrs.ac.class = &fc_transport_class.class; 2036 i->t.target_attrs.ac.match = fc_target_match; 2037 i->t.target_size = sizeof(struct fc_starget_attrs); 2038 transport_container_register(&i->t.target_attrs); 2039 2040 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2041 i->t.host_attrs.ac.class = &fc_host_class.class; 2042 i->t.host_attrs.ac.match = fc_host_match; 2043 i->t.host_size = sizeof(struct fc_host_attrs); 2044 if (ft->get_fc_host_stats) 2045 i->t.host_attrs.statistics = &fc_statistics_group; 2046 transport_container_register(&i->t.host_attrs); 2047 2048 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2049 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2050 i->rport_attr_cont.ac.match = fc_rport_match; 2051 transport_container_register(&i->rport_attr_cont); 2052 2053 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2054 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2055 i->vport_attr_cont.ac.match = fc_vport_match; 2056 transport_container_register(&i->vport_attr_cont); 2057 2058 i->f = ft; 2059 2060 /* Transport uses the shost workq for scsi scanning */ 2061 i->t.create_work_queue = 1; 2062 2063 i->t.eh_timed_out = fc_timed_out; 2064 2065 i->t.user_scan = fc_user_scan; 2066 2067 /* target-mode drivers' functions */ 2068 i->t.tsk_mgmt_response = fc_tsk_mgmt_response; 2069 i->t.it_nexus_response = fc_it_nexus_response; 2070 2071 /* 2072 * Setup SCSI Target Attributes. 2073 */ 2074 count = 0; 2075 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2076 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2077 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2078 2079 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2080 2081 i->starget_attrs[count] = NULL; 2082 2083 2084 /* 2085 * Setup SCSI Host Attributes. 2086 */ 2087 count=0; 2088 SETUP_HOST_ATTRIBUTE_RD(node_name); 2089 SETUP_HOST_ATTRIBUTE_RD(port_name); 2090 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2091 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2092 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2093 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2094 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2095 if (ft->vport_create) { 2096 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2097 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2098 } 2099 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2100 2101 SETUP_HOST_ATTRIBUTE_RD(port_id); 2102 SETUP_HOST_ATTRIBUTE_RD(port_type); 2103 SETUP_HOST_ATTRIBUTE_RD(port_state); 2104 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2105 SETUP_HOST_ATTRIBUTE_RD(speed); 2106 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2107 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2108 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2109 2110 /* Transport-managed attributes */ 2111 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2112 if (ft->issue_fc_host_lip) 2113 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2114 if (ft->vport_create) 2115 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2116 if (ft->vport_delete) 2117 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2118 2119 BUG_ON(count > FC_HOST_NUM_ATTRS); 2120 2121 i->host_attrs[count] = NULL; 2122 2123 /* 2124 * Setup Remote Port Attributes. 2125 */ 2126 count=0; 2127 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2128 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2129 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2130 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2131 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2132 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2133 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2134 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2135 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2136 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2137 2138 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2139 2140 i->rport_attrs[count] = NULL; 2141 2142 /* 2143 * Setup Virtual Port Attributes. 2144 */ 2145 count=0; 2146 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2147 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2148 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2149 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2150 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2151 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2152 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2153 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2154 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2155 2156 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2157 2158 i->vport_attrs[count] = NULL; 2159 2160 return &i->t; 2161} 2162EXPORT_SYMBOL(fc_attach_transport); 2163 2164void fc_release_transport(struct scsi_transport_template *t) 2165{ 2166 struct fc_internal *i = to_fc_internal(t); 2167 2168 transport_container_unregister(&i->t.target_attrs); 2169 transport_container_unregister(&i->t.host_attrs); 2170 transport_container_unregister(&i->rport_attr_cont); 2171 transport_container_unregister(&i->vport_attr_cont); 2172 2173 kfree(i); 2174} 2175EXPORT_SYMBOL(fc_release_transport); 2176 2177/** 2178 * fc_queue_work - Queue work to the fc_host workqueue. 2179 * @shost: Pointer to Scsi_Host bound to fc_host. 2180 * @work: Work to queue for execution. 2181 * 2182 * Return value: 2183 * 1 - work queued for execution 2184 * 0 - work is already queued 2185 * -EINVAL - work queue doesn't exist 2186 */ 2187static int 2188fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2189{ 2190 if (unlikely(!fc_host_work_q(shost))) { 2191 printk(KERN_ERR 2192 "ERROR: FC host '%s' attempted to queue work, " 2193 "when no workqueue created.\n", shost->hostt->name); 2194 dump_stack(); 2195 2196 return -EINVAL; 2197 } 2198 2199 return queue_work(fc_host_work_q(shost), work); 2200} 2201 2202/** 2203 * fc_flush_work - Flush a fc_host's workqueue. 2204 * @shost: Pointer to Scsi_Host bound to fc_host. 2205 */ 2206static void 2207fc_flush_work(struct Scsi_Host *shost) 2208{ 2209 if (!fc_host_work_q(shost)) { 2210 printk(KERN_ERR 2211 "ERROR: FC host '%s' attempted to flush work, " 2212 "when no workqueue created.\n", shost->hostt->name); 2213 dump_stack(); 2214 return; 2215 } 2216 2217 flush_workqueue(fc_host_work_q(shost)); 2218} 2219 2220/** 2221 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2222 * @shost: Pointer to Scsi_Host bound to fc_host. 2223 * @work: Work to queue for execution. 2224 * @delay: jiffies to delay the work queuing 2225 * 2226 * Return value: 2227 * 1 on success / 0 already queued / < 0 for error 2228 */ 2229static int 2230fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2231 unsigned long delay) 2232{ 2233 if (unlikely(!fc_host_devloss_work_q(shost))) { 2234 printk(KERN_ERR 2235 "ERROR: FC host '%s' attempted to queue work, " 2236 "when no workqueue created.\n", shost->hostt->name); 2237 dump_stack(); 2238 2239 return -EINVAL; 2240 } 2241 2242 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2243} 2244 2245/** 2246 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2247 * @shost: Pointer to Scsi_Host bound to fc_host. 2248 */ 2249static void 2250fc_flush_devloss(struct Scsi_Host *shost) 2251{ 2252 if (!fc_host_devloss_work_q(shost)) { 2253 printk(KERN_ERR 2254 "ERROR: FC host '%s' attempted to flush work, " 2255 "when no workqueue created.\n", shost->hostt->name); 2256 dump_stack(); 2257 return; 2258 } 2259 2260 flush_workqueue(fc_host_devloss_work_q(shost)); 2261} 2262 2263 2264/** 2265 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2266 * @shost: Which &Scsi_Host 2267 * 2268 * This routine is expected to be called immediately preceeding the 2269 * a driver's call to scsi_remove_host(). 2270 * 2271 * WARNING: A driver utilizing the fc_transport, which fails to call 2272 * this routine prior to scsi_remove_host(), will leave dangling 2273 * objects in /sys/class/fc_remote_ports. Access to any of these 2274 * objects can result in a system crash !!! 2275 * 2276 * Notes: 2277 * This routine assumes no locks are held on entry. 2278 */ 2279void 2280fc_remove_host(struct Scsi_Host *shost) 2281{ 2282 struct fc_vport *vport = NULL, *next_vport = NULL; 2283 struct fc_rport *rport = NULL, *next_rport = NULL; 2284 struct workqueue_struct *work_q; 2285 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2286 unsigned long flags; 2287 2288 spin_lock_irqsave(shost->host_lock, flags); 2289 2290 /* Remove any vports */ 2291 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) 2292 fc_queue_work(shost, &vport->vport_delete_work); 2293 2294 /* Remove any remote ports */ 2295 list_for_each_entry_safe(rport, next_rport, 2296 &fc_host->rports, peers) { 2297 list_del(&rport->peers); 2298 rport->port_state = FC_PORTSTATE_DELETED; 2299 fc_queue_work(shost, &rport->rport_delete_work); 2300 } 2301 2302 list_for_each_entry_safe(rport, next_rport, 2303 &fc_host->rport_bindings, peers) { 2304 list_del(&rport->peers); 2305 rport->port_state = FC_PORTSTATE_DELETED; 2306 fc_queue_work(shost, &rport->rport_delete_work); 2307 } 2308 2309 spin_unlock_irqrestore(shost->host_lock, flags); 2310 2311 /* flush all scan work items */ 2312 scsi_flush_work(shost); 2313 2314 /* flush all stgt delete, and rport delete work items, then kill it */ 2315 if (fc_host->work_q) { 2316 work_q = fc_host->work_q; 2317 fc_host->work_q = NULL; 2318 destroy_workqueue(work_q); 2319 } 2320 2321 /* flush all devloss work items, then kill it */ 2322 if (fc_host->devloss_work_q) { 2323 work_q = fc_host->devloss_work_q; 2324 fc_host->devloss_work_q = NULL; 2325 destroy_workqueue(work_q); 2326 } 2327} 2328EXPORT_SYMBOL(fc_remove_host); 2329 2330static void fc_terminate_rport_io(struct fc_rport *rport) 2331{ 2332 struct Scsi_Host *shost = rport_to_shost(rport); 2333 struct fc_internal *i = to_fc_internal(shost->transportt); 2334 2335 /* Involve the LLDD if possible to terminate all io on the rport. */ 2336 if (i->f->terminate_rport_io) 2337 i->f->terminate_rport_io(rport); 2338 2339 /* 2340 * must unblock to flush queued IO. The caller will have set 2341 * the port_state or flags, so that fc_remote_port_chkready will 2342 * fail IO. 2343 */ 2344 scsi_target_unblock(&rport->dev); 2345} 2346 2347/** 2348 * fc_starget_delete - called to delete the scsi decendents of an rport 2349 * @work: remote port to be operated on. 2350 * 2351 * Deletes target and all sdevs. 2352 */ 2353static void 2354fc_starget_delete(struct work_struct *work) 2355{ 2356 struct fc_rport *rport = 2357 container_of(work, struct fc_rport, stgt_delete_work); 2358 2359 fc_terminate_rport_io(rport); 2360 scsi_remove_target(&rport->dev); 2361} 2362 2363 2364/** 2365 * fc_rport_final_delete - finish rport termination and delete it. 2366 * @work: remote port to be deleted. 2367 */ 2368static void 2369fc_rport_final_delete(struct work_struct *work) 2370{ 2371 struct fc_rport *rport = 2372 container_of(work, struct fc_rport, rport_delete_work); 2373 struct device *dev = &rport->dev; 2374 struct Scsi_Host *shost = rport_to_shost(rport); 2375 struct fc_internal *i = to_fc_internal(shost->transportt); 2376 unsigned long flags; 2377 2378 /* 2379 * if a scan is pending, flush the SCSI Host work_q so that 2380 * that we can reclaim the rport scan work element. 2381 */ 2382 if (rport->flags & FC_RPORT_SCAN_PENDING) 2383 scsi_flush_work(shost); 2384 2385 fc_terminate_rport_io(rport); 2386 /* 2387 * Cancel any outstanding timers. These should really exist 2388 * only when rmmod'ing the LLDD and we're asking for 2389 * immediate termination of the rports 2390 */ 2391 spin_lock_irqsave(shost->host_lock, flags); 2392 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2393 spin_unlock_irqrestore(shost->host_lock, flags); 2394 if (!cancel_delayed_work(&rport->fail_io_work)) 2395 fc_flush_devloss(shost); 2396 if (!cancel_delayed_work(&rport->dev_loss_work)) 2397 fc_flush_devloss(shost); 2398 spin_lock_irqsave(shost->host_lock, flags); 2399 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2400 } 2401 spin_unlock_irqrestore(shost->host_lock, flags); 2402 2403 /* Delete SCSI target and sdevs */ 2404 if (rport->scsi_target_id != -1) 2405 fc_starget_delete(&rport->stgt_delete_work); 2406 2407 /* 2408 * Notify the driver that the rport is now dead. The LLDD will 2409 * also guarantee that any communication to the rport is terminated 2410 */ 2411 if (i->f->dev_loss_tmo_callbk) 2412 i->f->dev_loss_tmo_callbk(rport); 2413 2414 transport_remove_device(dev); 2415 device_del(dev); 2416 transport_destroy_device(dev); 2417 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2418 put_device(dev); /* for self-reference */ 2419} 2420 2421 2422/** 2423 * fc_rport_create - allocates and creates a remote FC port. 2424 * @shost: scsi host the remote port is connected to. 2425 * @channel: Channel on shost port connected to. 2426 * @ids: The world wide names, fc address, and FC4 port 2427 * roles for the remote port. 2428 * 2429 * Allocates and creates the remoter port structure, including the 2430 * class and sysfs creation. 2431 * 2432 * Notes: 2433 * This routine assumes no locks are held on entry. 2434 */ 2435static struct fc_rport * 2436fc_rport_create(struct Scsi_Host *shost, int channel, 2437 struct fc_rport_identifiers *ids) 2438{ 2439 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2440 struct fc_internal *fci = to_fc_internal(shost->transportt); 2441 struct fc_rport *rport; 2442 struct device *dev; 2443 unsigned long flags; 2444 int error; 2445 size_t size; 2446 2447 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2448 rport = kzalloc(size, GFP_KERNEL); 2449 if (unlikely(!rport)) { 2450 printk(KERN_ERR "%s: allocation failure\n", __func__); 2451 return NULL; 2452 } 2453 2454 rport->maxframe_size = -1; 2455 rport->supported_classes = FC_COS_UNSPECIFIED; 2456 rport->dev_loss_tmo = fc_dev_loss_tmo; 2457 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2458 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2459 rport->port_id = ids->port_id; 2460 rport->roles = ids->roles; 2461 rport->port_state = FC_PORTSTATE_ONLINE; 2462 if (fci->f->dd_fcrport_size) 2463 rport->dd_data = &rport[1]; 2464 rport->channel = channel; 2465 rport->fast_io_fail_tmo = -1; 2466 2467 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2468 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2469 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2470 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2471 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2472 2473 spin_lock_irqsave(shost->host_lock, flags); 2474 2475 rport->number = fc_host->next_rport_number++; 2476 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) 2477 rport->scsi_target_id = fc_host->next_target_id++; 2478 else 2479 rport->scsi_target_id = -1; 2480 list_add_tail(&rport->peers, &fc_host->rports); 2481 get_device(&shost->shost_gendev); /* for fc_host->rport list */ 2482 2483 spin_unlock_irqrestore(shost->host_lock, flags); 2484 2485 dev = &rport->dev; 2486 device_initialize(dev); /* takes self reference */ 2487 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2488 dev->release = fc_rport_dev_release; 2489 sprintf(dev->bus_id, "rport-%d:%d-%d", 2490 shost->host_no, channel, rport->number); 2491 transport_setup_device(dev); 2492 2493 error = device_add(dev); 2494 if (error) { 2495 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2496 goto delete_rport; 2497 } 2498 transport_add_device(dev); 2499 transport_configure_device(dev); 2500 2501 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2502 /* initiate a scan of the target */ 2503 rport->flags |= FC_RPORT_SCAN_PENDING; 2504 scsi_queue_work(shost, &rport->scan_work); 2505 } 2506 2507 return rport; 2508 2509delete_rport: 2510 transport_destroy_device(dev); 2511 spin_lock_irqsave(shost->host_lock, flags); 2512 list_del(&rport->peers); 2513 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2514 spin_unlock_irqrestore(shost->host_lock, flags); 2515 put_device(dev->parent); 2516 kfree(rport); 2517 return NULL; 2518} 2519 2520/** 2521 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2522 * @shost: scsi host the remote port is connected to. 2523 * @channel: Channel on shost port connected to. 2524 * @ids: The world wide names, fc address, and FC4 port 2525 * roles for the remote port. 2526 * 2527 * The LLDD calls this routine to notify the transport of the existence 2528 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2529 * of the port, it's FC address (port_id), and the FC4 roles that are 2530 * active for the port. 2531 * 2532 * For ports that are FCP targets (aka scsi targets), the FC transport 2533 * maintains consistent target id bindings on behalf of the LLDD. 2534 * A consistent target id binding is an assignment of a target id to 2535 * a remote port identifier, which persists while the scsi host is 2536 * attached. The remote port can disappear, then later reappear, and 2537 * it's target id assignment remains the same. This allows for shifts 2538 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2539 * changes to the scsi subsystem which is based on scsi host number and 2540 * target id values. Bindings are only valid during the attachment of 2541 * the scsi host. If the host detaches, then later re-attaches, target 2542 * id bindings may change. 2543 * 2544 * This routine is responsible for returning a remote port structure. 2545 * The routine will search the list of remote ports it maintains 2546 * internally on behalf of consistent target id mappings. If found, the 2547 * remote port structure will be reused. Otherwise, a new remote port 2548 * structure will be allocated. 2549 * 2550 * Whenever a remote port is allocated, a new fc_remote_port class 2551 * device is created. 2552 * 2553 * Should not be called from interrupt context. 2554 * 2555 * Notes: 2556 * This routine assumes no locks are held on entry. 2557 */ 2558struct fc_rport * 2559fc_remote_port_add(struct Scsi_Host *shost, int channel, 2560 struct fc_rport_identifiers *ids) 2561{ 2562 struct fc_internal *fci = to_fc_internal(shost->transportt); 2563 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2564 struct fc_rport *rport; 2565 unsigned long flags; 2566 int match = 0; 2567 2568 /* ensure any stgt delete functions are done */ 2569 fc_flush_work(shost); 2570 2571 /* 2572 * Search the list of "active" rports, for an rport that has been 2573 * deleted, but we've held off the real delete while the target 2574 * is in a "blocked" state. 2575 */ 2576 spin_lock_irqsave(shost->host_lock, flags); 2577 2578 list_for_each_entry(rport, &fc_host->rports, peers) { 2579 2580 if ((rport->port_state == FC_PORTSTATE_BLOCKED) && 2581 (rport->channel == channel)) { 2582 2583 switch (fc_host->tgtid_bind_type) { 2584 case FC_TGTID_BIND_BY_WWPN: 2585 case FC_TGTID_BIND_NONE: 2586 if (rport->port_name == ids->port_name) 2587 match = 1; 2588 break; 2589 case FC_TGTID_BIND_BY_WWNN: 2590 if (rport->node_name == ids->node_name) 2591 match = 1; 2592 break; 2593 case FC_TGTID_BIND_BY_ID: 2594 if (rport->port_id == ids->port_id) 2595 match = 1; 2596 break; 2597 } 2598 2599 if (match) { 2600 2601 memcpy(&rport->node_name, &ids->node_name, 2602 sizeof(rport->node_name)); 2603 memcpy(&rport->port_name, &ids->port_name, 2604 sizeof(rport->port_name)); 2605 rport->port_id = ids->port_id; 2606 2607 rport->port_state = FC_PORTSTATE_ONLINE; 2608 rport->roles = ids->roles; 2609 2610 spin_unlock_irqrestore(shost->host_lock, flags); 2611 2612 if (fci->f->dd_fcrport_size) 2613 memset(rport->dd_data, 0, 2614 fci->f->dd_fcrport_size); 2615 2616 /* 2617 * If we were not a target, cancel the 2618 * io terminate and rport timers, and 2619 * we're done. 2620 * 2621 * If we were a target, but our new role 2622 * doesn't indicate a target, leave the 2623 * timers running expecting the role to 2624 * change as the target fully logs in. If 2625 * it doesn't, the target will be torn down. 2626 * 2627 * If we were a target, and our role shows 2628 * we're still a target, cancel the timers 2629 * and kick off a scan. 2630 */ 2631 2632 /* was a target, not in roles */ 2633 if ((rport->scsi_target_id != -1) && 2634 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2635 return rport; 2636 2637 /* 2638 * Stop the fail io and dev_loss timers. 2639 * If they flush, the port_state will 2640 * be checked and will NOOP the function. 2641 */ 2642 if (!cancel_delayed_work(&rport->fail_io_work)) 2643 fc_flush_devloss(shost); 2644 if (!cancel_delayed_work(&rport->dev_loss_work)) 2645 fc_flush_devloss(shost); 2646 2647 spin_lock_irqsave(shost->host_lock, flags); 2648 2649 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2650 FC_RPORT_DEVLOSS_PENDING); 2651 2652 /* if target, initiate a scan */ 2653 if (rport->scsi_target_id != -1) { 2654 rport->flags |= FC_RPORT_SCAN_PENDING; 2655 scsi_queue_work(shost, 2656 &rport->scan_work); 2657 spin_unlock_irqrestore(shost->host_lock, 2658 flags); 2659 scsi_target_unblock(&rport->dev); 2660 } else 2661 spin_unlock_irqrestore(shost->host_lock, 2662 flags); 2663 2664 return rport; 2665 } 2666 } 2667 } 2668 2669 /* 2670 * Search the bindings array 2671 * Note: if never a FCP target, you won't be on this list 2672 */ 2673 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2674 2675 /* search for a matching consistent binding */ 2676 2677 list_for_each_entry(rport, &fc_host->rport_bindings, 2678 peers) { 2679 if (rport->channel != channel) 2680 continue; 2681 2682 switch (fc_host->tgtid_bind_type) { 2683 case FC_TGTID_BIND_BY_WWPN: 2684 if (rport->port_name == ids->port_name) 2685 match = 1; 2686 break; 2687 case FC_TGTID_BIND_BY_WWNN: 2688 if (rport->node_name == ids->node_name) 2689 match = 1; 2690 break; 2691 case FC_TGTID_BIND_BY_ID: 2692 if (rport->port_id == ids->port_id) 2693 match = 1; 2694 break; 2695 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2696 break; 2697 } 2698 2699 if (match) { 2700 list_move_tail(&rport->peers, &fc_host->rports); 2701 break; 2702 } 2703 } 2704 2705 if (match) { 2706 memcpy(&rport->node_name, &ids->node_name, 2707 sizeof(rport->node_name)); 2708 memcpy(&rport->port_name, &ids->port_name, 2709 sizeof(rport->port_name)); 2710 rport->port_id = ids->port_id; 2711 rport->roles = ids->roles; 2712 rport->port_state = FC_PORTSTATE_ONLINE; 2713 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2714 2715 if (fci->f->dd_fcrport_size) 2716 memset(rport->dd_data, 0, 2717 fci->f->dd_fcrport_size); 2718 2719 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2720 /* initiate a scan of the target */ 2721 rport->flags |= FC_RPORT_SCAN_PENDING; 2722 scsi_queue_work(shost, &rport->scan_work); 2723 spin_unlock_irqrestore(shost->host_lock, flags); 2724 scsi_target_unblock(&rport->dev); 2725 } else 2726 spin_unlock_irqrestore(shost->host_lock, flags); 2727 2728 return rport; 2729 } 2730 } 2731 2732 spin_unlock_irqrestore(shost->host_lock, flags); 2733 2734 /* No consistent binding found - create new remote port entry */ 2735 rport = fc_rport_create(shost, channel, ids); 2736 2737 return rport; 2738} 2739EXPORT_SYMBOL(fc_remote_port_add); 2740 2741 2742/** 2743 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2744 * @rport: The remote port that no longer exists 2745 * 2746 * The LLDD calls this routine to notify the transport that a remote 2747 * port is no longer part of the topology. Note: Although a port 2748 * may no longer be part of the topology, it may persist in the remote 2749 * ports displayed by the fc_host. We do this under 2 conditions: 2750 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2751 * This allows the port to temporarily disappear, then reappear without 2752 * disrupting the SCSI device tree attached to it. During the "blocked" 2753 * period the port will still exist. 2754 * 2) If the port was a scsi target and disappears for longer than we 2755 * expect, we'll delete the port and the tear down the SCSI device tree 2756 * attached to it. However, we want to semi-persist the target id assigned 2757 * to that port if it eventually does exist. The port structure will 2758 * remain (although with minimal information) so that the target id 2759 * bindings remails. 2760 * 2761 * If the remote port is not an FCP Target, it will be fully torn down 2762 * and deallocated, including the fc_remote_port class device. 2763 * 2764 * If the remote port is an FCP Target, the port will be placed in a 2765 * temporary blocked state. From the LLDD's perspective, the rport no 2766 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2767 * exists, but all sdevs on it are blocked from further I/O. The following 2768 * is then expected. 2769 * 2770 * If the remote port does not return (signaled by a LLDD call to 2771 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2772 * scsi target is removed - killing all outstanding i/o and removing the 2773 * scsi devices attached ot it. The port structure will be marked Not 2774 * Present and be partially cleared, leaving only enough information to 2775 * recognize the remote port relative to the scsi target id binding if 2776 * it later appears. The port will remain as long as there is a valid 2777 * binding (e.g. until the user changes the binding type or unloads the 2778 * scsi host with the binding). 2779 * 2780 * If the remote port returns within the dev_loss_tmo value (and matches 2781 * according to the target id binding type), the port structure will be 2782 * reused. If it is no longer a SCSI target, the target will be torn 2783 * down. If it continues to be a SCSI target, then the target will be 2784 * unblocked (allowing i/o to be resumed), and a scan will be activated 2785 * to ensure that all luns are detected. 2786 * 2787 * Called from normal process context only - cannot be called from interrupt. 2788 * 2789 * Notes: 2790 * This routine assumes no locks are held on entry. 2791 */ 2792void 2793fc_remote_port_delete(struct fc_rport *rport) 2794{ 2795 struct Scsi_Host *shost = rport_to_shost(rport); 2796 int timeout = rport->dev_loss_tmo; 2797 unsigned long flags; 2798 2799 /* 2800 * No need to flush the fc_host work_q's, as all adds are synchronous. 2801 * 2802 * We do need to reclaim the rport scan work element, so eventually 2803 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2804 * there's still a scan pending. 2805 */ 2806 2807 spin_lock_irqsave(shost->host_lock, flags); 2808 2809 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2810 spin_unlock_irqrestore(shost->host_lock, flags); 2811 return; 2812 } 2813 2814 /* 2815 * In the past, we if this was not an FCP-Target, we would 2816 * unconditionally just jump to deleting the rport. 2817 * However, rports can be used as node containers by the LLDD, 2818 * and its not appropriate to just terminate the rport at the 2819 * first sign of a loss in connectivity. The LLDD may want to 2820 * send ELS traffic to re-validate the login. If the rport is 2821 * immediately deleted, it makes it inappropriate for a node 2822 * container. 2823 * So... we now unconditionally wait dev_loss_tmo before 2824 * destroying an rport. 2825 */ 2826 2827 rport->port_state = FC_PORTSTATE_BLOCKED; 2828 2829 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 2830 2831 spin_unlock_irqrestore(shost->host_lock, flags); 2832 2833 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && 2834 shost->active_mode & MODE_TARGET) 2835 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); 2836 2837 scsi_target_block(&rport->dev); 2838 2839 /* see if we need to kill io faster than waiting for device loss */ 2840 if ((rport->fast_io_fail_tmo != -1) && 2841 (rport->fast_io_fail_tmo < timeout)) 2842 fc_queue_devloss_work(shost, &rport->fail_io_work, 2843 rport->fast_io_fail_tmo * HZ); 2844 2845 /* cap the length the devices can be blocked until they are deleted */ 2846 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 2847} 2848EXPORT_SYMBOL(fc_remote_port_delete); 2849 2850/** 2851 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 2852 * @rport: The remote port that changed. 2853 * @roles: New roles for this port. 2854 * 2855 * Description: The LLDD calls this routine to notify the transport that the 2856 * roles on a remote port may have changed. The largest effect of this is 2857 * if a port now becomes a FCP Target, it must be allocated a 2858 * scsi target id. If the port is no longer a FCP target, any 2859 * scsi target id value assigned to it will persist in case the 2860 * role changes back to include FCP Target. No changes in the scsi 2861 * midlayer will be invoked if the role changes (in the expectation 2862 * that the role will be resumed. If it doesn't normal error processing 2863 * will take place). 2864 * 2865 * Should not be called from interrupt context. 2866 * 2867 * Notes: 2868 * This routine assumes no locks are held on entry. 2869 */ 2870void 2871fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 2872{ 2873 struct Scsi_Host *shost = rport_to_shost(rport); 2874 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2875 unsigned long flags; 2876 int create = 0; 2877 int ret; 2878 2879 spin_lock_irqsave(shost->host_lock, flags); 2880 if (roles & FC_PORT_ROLE_FCP_TARGET) { 2881 if (rport->scsi_target_id == -1) { 2882 rport->scsi_target_id = fc_host->next_target_id++; 2883 create = 1; 2884 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 2885 create = 1; 2886 } else if (shost->active_mode & MODE_TARGET) { 2887 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, 2888 (char *)&rport->node_name); 2889 if (ret) 2890 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", 2891 ret); 2892 } 2893 2894 rport->roles = roles; 2895 2896 spin_unlock_irqrestore(shost->host_lock, flags); 2897 2898 if (create) { 2899 /* 2900 * There may have been a delete timer running on the 2901 * port. Ensure that it is cancelled as we now know 2902 * the port is an FCP Target. 2903 * Note: we know the rport is exists and in an online 2904 * state as the LLDD would not have had an rport 2905 * reference to pass us. 2906 * 2907 * Take no action on the del_timer failure as the state 2908 * machine state change will validate the 2909 * transaction. 2910 */ 2911 if (!cancel_delayed_work(&rport->fail_io_work)) 2912 fc_flush_devloss(shost); 2913 if (!cancel_delayed_work(&rport->dev_loss_work)) 2914 fc_flush_devloss(shost); 2915 2916 spin_lock_irqsave(shost->host_lock, flags); 2917 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2918 FC_RPORT_DEVLOSS_PENDING); 2919 spin_unlock_irqrestore(shost->host_lock, flags); 2920 2921 /* ensure any stgt delete functions are done */ 2922 fc_flush_work(shost); 2923 2924 /* initiate a scan of the target */ 2925 spin_lock_irqsave(shost->host_lock, flags); 2926 rport->flags |= FC_RPORT_SCAN_PENDING; 2927 scsi_queue_work(shost, &rport->scan_work); 2928 spin_unlock_irqrestore(shost->host_lock, flags); 2929 scsi_target_unblock(&rport->dev); 2930 } 2931} 2932EXPORT_SYMBOL(fc_remote_port_rolechg); 2933 2934/** 2935 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 2936 * @work: rport target that failed to reappear in the allotted time. 2937 * 2938 * Description: An attempt to delete a remote port blocks, and if it fails 2939 * to return in the allotted time this gets called. 2940 */ 2941static void 2942fc_timeout_deleted_rport(struct work_struct *work) 2943{ 2944 struct fc_rport *rport = 2945 container_of(work, struct fc_rport, dev_loss_work.work); 2946 struct Scsi_Host *shost = rport_to_shost(rport); 2947 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2948 unsigned long flags; 2949 2950 spin_lock_irqsave(shost->host_lock, flags); 2951 2952 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2953 2954 /* 2955 * If the port is ONLINE, then it came back. If it was a SCSI 2956 * target, validate it still is. If not, tear down the 2957 * scsi_target on it. 2958 */ 2959 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 2960 (rport->scsi_target_id != -1) && 2961 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 2962 dev_printk(KERN_ERR, &rport->dev, 2963 "blocked FC remote port time out: no longer" 2964 " a FCP target, removing starget\n"); 2965 spin_unlock_irqrestore(shost->host_lock, flags); 2966 scsi_target_unblock(&rport->dev); 2967 fc_queue_work(shost, &rport->stgt_delete_work); 2968 return; 2969 } 2970 2971 /* NOOP state - we're flushing workq's */ 2972 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 2973 spin_unlock_irqrestore(shost->host_lock, flags); 2974 dev_printk(KERN_ERR, &rport->dev, 2975 "blocked FC remote port time out: leaving" 2976 " rport%s alone\n", 2977 (rport->scsi_target_id != -1) ? " and starget" : ""); 2978 return; 2979 } 2980 2981 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 2982 (rport->scsi_target_id == -1)) { 2983 list_del(&rport->peers); 2984 rport->port_state = FC_PORTSTATE_DELETED; 2985 dev_printk(KERN_ERR, &rport->dev, 2986 "blocked FC remote port time out: removing" 2987 " rport%s\n", 2988 (rport->scsi_target_id != -1) ? " and starget" : ""); 2989 fc_queue_work(shost, &rport->rport_delete_work); 2990 spin_unlock_irqrestore(shost->host_lock, flags); 2991 return; 2992 } 2993 2994 dev_printk(KERN_ERR, &rport->dev, 2995 "blocked FC remote port time out: removing target and " 2996 "saving binding\n"); 2997 2998 list_move_tail(&rport->peers, &fc_host->rport_bindings); 2999 3000 /* 3001 * Note: We do not remove or clear the hostdata area. This allows 3002 * host-specific target data to persist along with the 3003 * scsi_target_id. It's up to the host to manage it's hostdata area. 3004 */ 3005 3006 /* 3007 * Reinitialize port attributes that may change if the port comes back. 3008 */ 3009 rport->maxframe_size = -1; 3010 rport->supported_classes = FC_COS_UNSPECIFIED; 3011 rport->roles = FC_PORT_ROLE_UNKNOWN; 3012 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3013 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3014 3015 /* 3016 * Pre-emptively kill I/O rather than waiting for the work queue 3017 * item to teardown the starget. (FCOE libFC folks prefer this 3018 * and to have the rport_port_id still set when it's done). 3019 */ 3020 spin_unlock_irqrestore(shost->host_lock, flags); 3021 fc_terminate_rport_io(rport); 3022 3023 BUG_ON(rport->port_state != FC_PORTSTATE_NOTPRESENT); 3024 3025 /* remove the identifiers that aren't used in the consisting binding */ 3026 switch (fc_host->tgtid_bind_type) { 3027 case FC_TGTID_BIND_BY_WWPN: 3028 rport->node_name = -1; 3029 rport->port_id = -1; 3030 break; 3031 case FC_TGTID_BIND_BY_WWNN: 3032 rport->port_name = -1; 3033 rport->port_id = -1; 3034 break; 3035 case FC_TGTID_BIND_BY_ID: 3036 rport->node_name = -1; 3037 rport->port_name = -1; 3038 break; 3039 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3040 break; 3041 } 3042 3043 /* 3044 * As this only occurs if the remote port (scsi target) 3045 * went away and didn't come back - we'll remove 3046 * all attached scsi devices. 3047 */ 3048 fc_queue_work(shost, &rport->stgt_delete_work); 3049} 3050 3051/** 3052 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3053 * @work: rport to terminate io on. 3054 * 3055 * Notes: Only requests the failure of the io, not that all are flushed 3056 * prior to returning. 3057 */ 3058static void 3059fc_timeout_fail_rport_io(struct work_struct *work) 3060{ 3061 struct fc_rport *rport = 3062 container_of(work, struct fc_rport, fail_io_work.work); 3063 3064 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3065 return; 3066 3067 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3068 fc_terminate_rport_io(rport); 3069} 3070 3071/** 3072 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3073 * @work: remote port to be scanned. 3074 */ 3075static void 3076fc_scsi_scan_rport(struct work_struct *work) 3077{ 3078 struct fc_rport *rport = 3079 container_of(work, struct fc_rport, scan_work); 3080 struct Scsi_Host *shost = rport_to_shost(rport); 3081 struct fc_internal *i = to_fc_internal(shost->transportt); 3082 unsigned long flags; 3083 3084 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3085 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3086 !(i->f->disable_target_scan)) { 3087 scsi_scan_target(&rport->dev, rport->channel, 3088 rport->scsi_target_id, SCAN_WILD_CARD, 1); 3089 } 3090 3091 spin_lock_irqsave(shost->host_lock, flags); 3092 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3093 spin_unlock_irqrestore(shost->host_lock, flags); 3094} 3095 3096 3097/** 3098 * fc_vport_setup - allocates and creates a FC virtual port. 3099 * @shost: scsi host the virtual port is connected to. 3100 * @channel: Channel on shost port connected to. 3101 * @pdev: parent device for vport 3102 * @ids: The world wide names, FC4 port roles, etc for 3103 * the virtual port. 3104 * @ret_vport: The pointer to the created vport. 3105 * 3106 * Allocates and creates the vport structure, calls the parent host 3107 * to instantiate the vport, the completes w/ class and sysfs creation. 3108 * 3109 * Notes: 3110 * This routine assumes no locks are held on entry. 3111 */ 3112static int 3113fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3114 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3115{ 3116 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3117 struct fc_internal *fci = to_fc_internal(shost->transportt); 3118 struct fc_vport *vport; 3119 struct device *dev; 3120 unsigned long flags; 3121 size_t size; 3122 int error; 3123 3124 *ret_vport = NULL; 3125 3126 if ( ! fci->f->vport_create) 3127 return -ENOENT; 3128 3129 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3130 vport = kzalloc(size, GFP_KERNEL); 3131 if (unlikely(!vport)) { 3132 printk(KERN_ERR "%s: allocation failure\n", __func__); 3133 return -ENOMEM; 3134 } 3135 3136 vport->vport_state = FC_VPORT_UNKNOWN; 3137 vport->vport_last_state = FC_VPORT_UNKNOWN; 3138 vport->node_name = ids->node_name; 3139 vport->port_name = ids->port_name; 3140 vport->roles = ids->roles; 3141 vport->vport_type = ids->vport_type; 3142 if (fci->f->dd_fcvport_size) 3143 vport->dd_data = &vport[1]; 3144 vport->shost = shost; 3145 vport->channel = channel; 3146 vport->flags = FC_VPORT_CREATING; 3147 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3148 3149 spin_lock_irqsave(shost->host_lock, flags); 3150 3151 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3152 spin_unlock_irqrestore(shost->host_lock, flags); 3153 kfree(vport); 3154 return -ENOSPC; 3155 } 3156 fc_host->npiv_vports_inuse++; 3157 vport->number = fc_host->next_vport_number++; 3158 list_add_tail(&vport->peers, &fc_host->vports); 3159 get_device(&shost->shost_gendev); /* for fc_host->vport list */ 3160 3161 spin_unlock_irqrestore(shost->host_lock, flags); 3162 3163 dev = &vport->dev; 3164 device_initialize(dev); /* takes self reference */ 3165 dev->parent = get_device(pdev); /* takes parent reference */ 3166 dev->release = fc_vport_dev_release; 3167 sprintf(dev->bus_id, "vport-%d:%d-%d", 3168 shost->host_no, channel, vport->number); 3169 transport_setup_device(dev); 3170 3171 error = device_add(dev); 3172 if (error) { 3173 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3174 goto delete_vport; 3175 } 3176 transport_add_device(dev); 3177 transport_configure_device(dev); 3178 3179 error = fci->f->vport_create(vport, ids->disable); 3180 if (error) { 3181 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3182 goto delete_vport_all; 3183 } 3184 3185 /* 3186 * if the parent isn't the physical adapter's Scsi_Host, ensure 3187 * the Scsi_Host at least contains ia symlink to the vport. 3188 */ 3189 if (pdev != &shost->shost_gendev) { 3190 error = sysfs_create_link(&shost->shost_gendev.kobj, 3191 &dev->kobj, dev->bus_id); 3192 if (error) 3193 printk(KERN_ERR 3194 "%s: Cannot create vport symlinks for " 3195 "%s, err=%d\n", 3196 __func__, dev->bus_id, error); 3197 } 3198 spin_lock_irqsave(shost->host_lock, flags); 3199 vport->flags &= ~FC_VPORT_CREATING; 3200 spin_unlock_irqrestore(shost->host_lock, flags); 3201 3202 dev_printk(KERN_NOTICE, pdev, 3203 "%s created via shost%d channel %d\n", dev->bus_id, 3204 shost->host_no, channel); 3205 3206 *ret_vport = vport; 3207 3208 return 0; 3209 3210delete_vport_all: 3211 transport_remove_device(dev); 3212 device_del(dev); 3213delete_vport: 3214 transport_destroy_device(dev); 3215 spin_lock_irqsave(shost->host_lock, flags); 3216 list_del(&vport->peers); 3217 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3218 fc_host->npiv_vports_inuse--; 3219 spin_unlock_irqrestore(shost->host_lock, flags); 3220 put_device(dev->parent); 3221 kfree(vport); 3222 3223 return error; 3224} 3225 3226/** 3227 * fc_vport_create - Admin App or LLDD requests creation of a vport 3228 * @shost: scsi host the virtual port is connected to. 3229 * @channel: channel on shost port connected to. 3230 * @ids: The world wide names, FC4 port roles, etc for 3231 * the virtual port. 3232 * 3233 * Notes: 3234 * This routine assumes no locks are held on entry. 3235 */ 3236struct fc_vport * 3237fc_vport_create(struct Scsi_Host *shost, int channel, 3238 struct fc_vport_identifiers *ids) 3239{ 3240 int stat; 3241 struct fc_vport *vport; 3242 3243 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3244 ids, &vport); 3245 return stat ? NULL : vport; 3246} 3247EXPORT_SYMBOL(fc_vport_create); 3248 3249/** 3250 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3251 * @vport: fc_vport to be terminated 3252 * 3253 * Calls the LLDD vport_delete() function, then deallocates and removes 3254 * the vport from the shost and object tree. 3255 * 3256 * Notes: 3257 * This routine assumes no locks are held on entry. 3258 */ 3259int 3260fc_vport_terminate(struct fc_vport *vport) 3261{ 3262 struct Scsi_Host *shost = vport_to_shost(vport); 3263 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3264 struct fc_internal *i = to_fc_internal(shost->transportt); 3265 struct device *dev = &vport->dev; 3266 unsigned long flags; 3267 int stat; 3268 3269 spin_lock_irqsave(shost->host_lock, flags); 3270 if (vport->flags & FC_VPORT_CREATING) { 3271 spin_unlock_irqrestore(shost->host_lock, flags); 3272 return -EBUSY; 3273 } 3274 if (vport->flags & (FC_VPORT_DEL)) { 3275 spin_unlock_irqrestore(shost->host_lock, flags); 3276 return -EALREADY; 3277 } 3278 vport->flags |= FC_VPORT_DELETING; 3279 spin_unlock_irqrestore(shost->host_lock, flags); 3280 3281 if (i->f->vport_delete) 3282 stat = i->f->vport_delete(vport); 3283 else 3284 stat = -ENOENT; 3285 3286 spin_lock_irqsave(shost->host_lock, flags); 3287 vport->flags &= ~FC_VPORT_DELETING; 3288 if (!stat) { 3289 vport->flags |= FC_VPORT_DELETED; 3290 list_del(&vport->peers); 3291 fc_host->npiv_vports_inuse--; 3292 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3293 } 3294 spin_unlock_irqrestore(shost->host_lock, flags); 3295 3296 if (stat) 3297 return stat; 3298 3299 if (dev->parent != &shost->shost_gendev) 3300 sysfs_remove_link(&shost->shost_gendev.kobj, dev->bus_id); 3301 transport_remove_device(dev); 3302 device_del(dev); 3303 transport_destroy_device(dev); 3304 3305 /* 3306 * Removing our self-reference should mean our 3307 * release function gets called, which will drop the remaining 3308 * parent reference and free the data structure. 3309 */ 3310 put_device(dev); /* for self-reference */ 3311 3312 return 0; /* SUCCESS */ 3313} 3314EXPORT_SYMBOL(fc_vport_terminate); 3315 3316/** 3317 * fc_vport_sched_delete - workq-based delete request for a vport 3318 * @work: vport to be deleted. 3319 */ 3320static void 3321fc_vport_sched_delete(struct work_struct *work) 3322{ 3323 struct fc_vport *vport = 3324 container_of(work, struct fc_vport, vport_delete_work); 3325 int stat; 3326 3327 stat = fc_vport_terminate(vport); 3328 if (stat) 3329 dev_printk(KERN_ERR, vport->dev.parent, 3330 "%s: %s could not be deleted created via " 3331 "shost%d channel %d - error %d\n", __func__, 3332 vport->dev.bus_id, vport->shost->host_no, 3333 vport->channel, stat); 3334} 3335 3336 3337/* Original Author: Martin Hicks */ 3338MODULE_AUTHOR("James Smart"); 3339MODULE_DESCRIPTION("FC Transport Attributes"); 3340MODULE_LICENSE("GPL"); 3341 3342module_init(fc_transport_init); 3343module_exit(fc_transport_exit); 3344