1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * FiberChannel transport specific attributes exported to sysfs. 4 * 5 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. 6 * Copyright (C) 2004-2007 James Smart, Emulex Corporation 7 * Rewrite for host, target, device, and remote port attributes, 8 * statistics, and service functions... 9 * Add vports, etc 10 */ 11#include <linux/module.h> 12#include <linux/init.h> 13#include <linux/slab.h> 14#include <linux/delay.h> 15#include <linux/kernel.h> 16#include <linux/bsg-lib.h> 17#include <scsi/scsi_device.h> 18#include <scsi/scsi_host.h> 19#include <scsi/scsi_transport.h> 20#include <scsi/scsi_transport_fc.h> 21#include <scsi/scsi_cmnd.h> 22#include <net/netlink.h> 23#include <scsi/scsi_netlink_fc.h> 24#include <scsi/scsi_bsg_fc.h> 25#include "scsi_priv.h" 26 27static int fc_queue_work(struct Scsi_Host *, struct work_struct *); 28static void fc_vport_sched_delete(struct work_struct *work); 29static int fc_vport_setup(struct Scsi_Host *shost, int channel, 30 struct device *pdev, struct fc_vport_identifiers *ids, 31 struct fc_vport **vport); 32static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); 33static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); 34static void fc_bsg_remove(struct request_queue *); 35static void fc_bsg_goose_queue(struct fc_rport *); 36 37/* 38 * Module Parameters 39 */ 40 41/* 42 * dev_loss_tmo: the default number of seconds that the FC transport 43 * should insulate the loss of a remote port. 44 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 45 */ 46static unsigned int fc_dev_loss_tmo = 60; /* seconds */ 47 48module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); 49MODULE_PARM_DESC(dev_loss_tmo, 50 "Maximum number of seconds that the FC transport should" 51 " insulate the loss of a remote port. Once this value is" 52 " exceeded, the scsi target is removed. Value should be" 53 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" 54 " fast_io_fail_tmo is not set."); 55 56/* 57 * Redefine so that we can have same named attributes in the 58 * sdev/starget/host objects. 59 */ 60#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 61struct device_attribute device_attr_##_prefix##_##_name = \ 62 __ATTR(_name,_mode,_show,_store) 63 64#define fc_enum_name_search(title, table_type, table) \ 65static const char *get_fc_##title##_name(enum table_type table_key) \ 66{ \ 67 int i; \ 68 char *name = NULL; \ 69 \ 70 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 71 if (table[i].value == table_key) { \ 72 name = table[i].name; \ 73 break; \ 74 } \ 75 } \ 76 return name; \ 77} 78 79#define fc_enum_name_match(title, table_type, table) \ 80static int get_fc_##title##_match(const char *table_key, \ 81 enum table_type *value) \ 82{ \ 83 int i; \ 84 \ 85 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 86 if (strncmp(table_key, table[i].name, \ 87 table[i].matchlen) == 0) { \ 88 *value = table[i].value; \ 89 return 0; /* success */ \ 90 } \ 91 } \ 92 return 1; /* failure */ \ 93} 94 95 96/* Convert fc_port_type values to ascii string name */ 97static struct { 98 enum fc_port_type value; 99 char *name; 100} fc_port_type_names[] = { 101 { FC_PORTTYPE_UNKNOWN, "Unknown" }, 102 { FC_PORTTYPE_OTHER, "Other" }, 103 { FC_PORTTYPE_NOTPRESENT, "Not Present" }, 104 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, 105 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, 106 { FC_PORTTYPE_LPORT, "LPort (private loop)" }, 107 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, 108 { FC_PORTTYPE_NPIV, "NPIV VPORT" }, 109}; 110fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) 111#define FC_PORTTYPE_MAX_NAMELEN 50 112 113/* Reuse fc_port_type enum function for vport_type */ 114#define get_fc_vport_type_name get_fc_port_type_name 115 116 117/* Convert fc_host_event_code values to ascii string name */ 118static const struct { 119 enum fc_host_event_code value; 120 char *name; 121} fc_host_event_code_names[] = { 122 { FCH_EVT_LIP, "lip" }, 123 { FCH_EVT_LINKUP, "link_up" }, 124 { FCH_EVT_LINKDOWN, "link_down" }, 125 { FCH_EVT_LIPRESET, "lip_reset" }, 126 { FCH_EVT_RSCN, "rscn" }, 127 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, 128 { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, 129 { FCH_EVT_PORT_ONLINE, "port_online" }, 130 { FCH_EVT_PORT_OFFLINE, "port_offline" }, 131 { FCH_EVT_PORT_FABRIC, "port_fabric" }, 132 { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, 133 { FCH_EVT_LINK_FPIN, "link_FPIN" }, 134 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 135}; 136fc_enum_name_search(host_event_code, fc_host_event_code, 137 fc_host_event_code_names) 138#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 139 140 141/* Convert fc_port_state values to ascii string name */ 142static struct { 143 enum fc_port_state value; 144 char *name; 145} fc_port_state_names[] = { 146 { FC_PORTSTATE_UNKNOWN, "Unknown" }, 147 { FC_PORTSTATE_NOTPRESENT, "Not Present" }, 148 { FC_PORTSTATE_ONLINE, "Online" }, 149 { FC_PORTSTATE_OFFLINE, "Offline" }, 150 { FC_PORTSTATE_BLOCKED, "Blocked" }, 151 { FC_PORTSTATE_BYPASSED, "Bypassed" }, 152 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, 153 { FC_PORTSTATE_LINKDOWN, "Linkdown" }, 154 { FC_PORTSTATE_ERROR, "Error" }, 155 { FC_PORTSTATE_LOOPBACK, "Loopback" }, 156 { FC_PORTSTATE_DELETED, "Deleted" }, 157}; 158fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 159#define FC_PORTSTATE_MAX_NAMELEN 20 160 161 162/* Convert fc_vport_state values to ascii string name */ 163static struct { 164 enum fc_vport_state value; 165 char *name; 166} fc_vport_state_names[] = { 167 { FC_VPORT_UNKNOWN, "Unknown" }, 168 { FC_VPORT_ACTIVE, "Active" }, 169 { FC_VPORT_DISABLED, "Disabled" }, 170 { FC_VPORT_LINKDOWN, "Linkdown" }, 171 { FC_VPORT_INITIALIZING, "Initializing" }, 172 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 173 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 174 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 175 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 176 { FC_VPORT_FAILED, "VPort Failed" }, 177}; 178fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 179#define FC_VPORTSTATE_MAX_NAMELEN 24 180 181/* Reuse fc_vport_state enum function for vport_last_state */ 182#define get_fc_vport_last_state_name get_fc_vport_state_name 183 184 185/* Convert fc_tgtid_binding_type values to ascii string name */ 186static const struct { 187 enum fc_tgtid_binding_type value; 188 char *name; 189 int matchlen; 190} fc_tgtid_binding_type_names[] = { 191 { FC_TGTID_BIND_NONE, "none", 4 }, 192 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 193 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 194 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 195}; 196fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 197 fc_tgtid_binding_type_names) 198fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 199 fc_tgtid_binding_type_names) 200#define FC_BINDTYPE_MAX_NAMELEN 30 201 202 203#define fc_bitfield_name_search(title, table) \ 204static ssize_t \ 205get_fc_##title##_names(u32 table_key, char *buf) \ 206{ \ 207 char *prefix = ""; \ 208 ssize_t len = 0; \ 209 int i; \ 210 \ 211 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 212 if (table[i].value & table_key) { \ 213 len += sprintf(buf + len, "%s%s", \ 214 prefix, table[i].name); \ 215 prefix = ", "; \ 216 } \ 217 } \ 218 len += sprintf(buf + len, "\n"); \ 219 return len; \ 220} 221 222 223/* Convert FC_COS bit values to ascii string name */ 224static const struct { 225 u32 value; 226 char *name; 227} fc_cos_names[] = { 228 { FC_COS_CLASS1, "Class 1" }, 229 { FC_COS_CLASS2, "Class 2" }, 230 { FC_COS_CLASS3, "Class 3" }, 231 { FC_COS_CLASS4, "Class 4" }, 232 { FC_COS_CLASS6, "Class 6" }, 233}; 234fc_bitfield_name_search(cos, fc_cos_names) 235 236 237/* Convert FC_PORTSPEED bit values to ascii string name */ 238static const struct { 239 u32 value; 240 char *name; 241} fc_port_speed_names[] = { 242 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 243 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 244 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 245 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 246 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 247 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 248 { FC_PORTSPEED_32GBIT, "32 Gbit" }, 249 { FC_PORTSPEED_20GBIT, "20 Gbit" }, 250 { FC_PORTSPEED_40GBIT, "40 Gbit" }, 251 { FC_PORTSPEED_50GBIT, "50 Gbit" }, 252 { FC_PORTSPEED_100GBIT, "100 Gbit" }, 253 { FC_PORTSPEED_25GBIT, "25 Gbit" }, 254 { FC_PORTSPEED_64GBIT, "64 Gbit" }, 255 { FC_PORTSPEED_128GBIT, "128 Gbit" }, 256 { FC_PORTSPEED_256GBIT, "256 Gbit" }, 257 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 258}; 259fc_bitfield_name_search(port_speed, fc_port_speed_names) 260 261 262static int 263show_fc_fc4s (char *buf, u8 *fc4_list) 264{ 265 int i, len=0; 266 267 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 268 len += sprintf(buf + len , "0x%02x ", *fc4_list); 269 len += sprintf(buf + len, "\n"); 270 return len; 271} 272 273 274/* Convert FC_PORT_ROLE bit values to ascii string name */ 275static const struct { 276 u32 value; 277 char *name; 278} fc_port_role_names[] = { 279 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 280 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 281 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 282 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" }, 283 { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" }, 284 { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" }, 285 { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" }, 286}; 287fc_bitfield_name_search(port_roles, fc_port_role_names) 288 289/* 290 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 291 */ 292#define FC_WELLKNOWN_PORTID_MASK 0xfffff0 293#define FC_WELLKNOWN_ROLE_MASK 0x00000f 294#define FC_FPORT_PORTID 0x00000e 295#define FC_FABCTLR_PORTID 0x00000d 296#define FC_DIRSRVR_PORTID 0x00000c 297#define FC_TIMESRVR_PORTID 0x00000b 298#define FC_MGMTSRVR_PORTID 0x00000a 299 300 301static void fc_timeout_deleted_rport(struct work_struct *work); 302static void fc_timeout_fail_rport_io(struct work_struct *work); 303static void fc_scsi_scan_rport(struct work_struct *work); 304 305/* 306 * Attribute counts pre object type... 307 * Increase these values if you add attributes 308 */ 309#define FC_STARGET_NUM_ATTRS 3 310#define FC_RPORT_NUM_ATTRS 10 311#define FC_VPORT_NUM_ATTRS 9 312#define FC_HOST_NUM_ATTRS 29 313 314struct fc_internal { 315 struct scsi_transport_template t; 316 struct fc_function_template *f; 317 318 /* 319 * For attributes : each object has : 320 * An array of the actual attributes structures 321 * An array of null-terminated pointers to the attribute 322 * structures - used for mid-layer interaction. 323 * 324 * The attribute containers for the starget and host are are 325 * part of the midlayer. As the remote port is specific to the 326 * fc transport, we must provide the attribute container. 327 */ 328 struct device_attribute private_starget_attrs[ 329 FC_STARGET_NUM_ATTRS]; 330 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 331 332 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 333 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 334 335 struct transport_container rport_attr_cont; 336 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 337 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 338 339 struct transport_container vport_attr_cont; 340 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 341 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 342}; 343 344#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 345 346static int fc_target_setup(struct transport_container *tc, struct device *dev, 347 struct device *cdev) 348{ 349 struct scsi_target *starget = to_scsi_target(dev); 350 struct fc_rport *rport = starget_to_rport(starget); 351 352 /* 353 * if parent is remote port, use values from remote port. 354 * Otherwise, this host uses the fc_transport, but not the 355 * remote port interface. As such, initialize to known non-values. 356 */ 357 if (rport) { 358 fc_starget_node_name(starget) = rport->node_name; 359 fc_starget_port_name(starget) = rport->port_name; 360 fc_starget_port_id(starget) = rport->port_id; 361 } else { 362 fc_starget_node_name(starget) = -1; 363 fc_starget_port_name(starget) = -1; 364 fc_starget_port_id(starget) = -1; 365 } 366 367 return 0; 368} 369 370static DECLARE_TRANSPORT_CLASS(fc_transport_class, 371 "fc_transport", 372 fc_target_setup, 373 NULL, 374 NULL); 375 376static int fc_host_setup(struct transport_container *tc, struct device *dev, 377 struct device *cdev) 378{ 379 struct Scsi_Host *shost = dev_to_shost(dev); 380 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 381 382 /* 383 * Set default values easily detected by the midlayer as 384 * failure cases. The scsi lldd is responsible for initializing 385 * all transport attributes to valid values per host. 386 */ 387 fc_host->node_name = -1; 388 fc_host->port_name = -1; 389 fc_host->permanent_port_name = -1; 390 fc_host->supported_classes = FC_COS_UNSPECIFIED; 391 memset(fc_host->supported_fc4s, 0, 392 sizeof(fc_host->supported_fc4s)); 393 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 394 fc_host->maxframe_size = -1; 395 fc_host->max_npiv_vports = 0; 396 memset(fc_host->serial_number, 0, 397 sizeof(fc_host->serial_number)); 398 memset(fc_host->manufacturer, 0, 399 sizeof(fc_host->manufacturer)); 400 memset(fc_host->model, 0, 401 sizeof(fc_host->model)); 402 memset(fc_host->model_description, 0, 403 sizeof(fc_host->model_description)); 404 memset(fc_host->hardware_version, 0, 405 sizeof(fc_host->hardware_version)); 406 memset(fc_host->driver_version, 0, 407 sizeof(fc_host->driver_version)); 408 memset(fc_host->firmware_version, 0, 409 sizeof(fc_host->firmware_version)); 410 memset(fc_host->optionrom_version, 0, 411 sizeof(fc_host->optionrom_version)); 412 413 fc_host->port_id = -1; 414 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 415 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 416 memset(fc_host->active_fc4s, 0, 417 sizeof(fc_host->active_fc4s)); 418 fc_host->speed = FC_PORTSPEED_UNKNOWN; 419 fc_host->fabric_name = -1; 420 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 421 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 422 423 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 424 425 INIT_LIST_HEAD(&fc_host->rports); 426 INIT_LIST_HEAD(&fc_host->rport_bindings); 427 INIT_LIST_HEAD(&fc_host->vports); 428 fc_host->next_rport_number = 0; 429 fc_host->next_target_id = 0; 430 fc_host->next_vport_number = 0; 431 fc_host->npiv_vports_inuse = 0; 432 433 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 434 "fc_wq_%d", shost->host_no); 435 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); 436 if (!fc_host->work_q) 437 return -ENOMEM; 438 439 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 440 snprintf(fc_host->devloss_work_q_name, 441 sizeof(fc_host->devloss_work_q_name), 442 "fc_dl_%d", shost->host_no); 443 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, 444 fc_host->devloss_work_q_name); 445 if (!fc_host->devloss_work_q) { 446 destroy_workqueue(fc_host->work_q); 447 fc_host->work_q = NULL; 448 return -ENOMEM; 449 } 450 451 fc_bsg_hostadd(shost, fc_host); 452 /* ignore any bsg add error - we just can't do sgio */ 453 454 return 0; 455} 456 457static int fc_host_remove(struct transport_container *tc, struct device *dev, 458 struct device *cdev) 459{ 460 struct Scsi_Host *shost = dev_to_shost(dev); 461 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 462 463 fc_bsg_remove(fc_host->rqst_q); 464 return 0; 465} 466 467static DECLARE_TRANSPORT_CLASS(fc_host_class, 468 "fc_host", 469 fc_host_setup, 470 fc_host_remove, 471 NULL); 472 473/* 474 * Setup and Remove actions for remote ports are handled 475 * in the service functions below. 476 */ 477static DECLARE_TRANSPORT_CLASS(fc_rport_class, 478 "fc_remote_ports", 479 NULL, 480 NULL, 481 NULL); 482 483/* 484 * Setup and Remove actions for virtual ports are handled 485 * in the service functions below. 486 */ 487static DECLARE_TRANSPORT_CLASS(fc_vport_class, 488 "fc_vports", 489 NULL, 490 NULL, 491 NULL); 492 493/* 494 * Netlink Infrastructure 495 */ 496 497static atomic_t fc_event_seq; 498 499/** 500 * fc_get_event_number - Obtain the next sequential FC event number 501 * 502 * Notes: 503 * We could have inlined this, but it would have required fc_event_seq to 504 * be exposed. For now, live with the subroutine call. 505 * Atomic used to avoid lock/unlock... 506 */ 507u32 508fc_get_event_number(void) 509{ 510 return atomic_add_return(1, &fc_event_seq); 511} 512EXPORT_SYMBOL(fc_get_event_number); 513 514/** 515 * fc_host_post_fc_event - routine to do the work of posting an event 516 * on an fc_host. 517 * @shost: host the event occurred on 518 * @event_number: fc event number obtained from get_fc_event_number() 519 * @event_code: fc_host event being posted 520 * @data_len: amount, in bytes, of event data 521 * @data_buf: pointer to event data 522 * @vendor_id: value for Vendor id 523 * 524 * Notes: 525 * This routine assumes no locks are held on entry. 526 */ 527void 528fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number, 529 enum fc_host_event_code event_code, 530 u32 data_len, char *data_buf, u64 vendor_id) 531{ 532 struct sk_buff *skb; 533 struct nlmsghdr *nlh; 534 struct fc_nl_event *event; 535 const char *name; 536 u32 len; 537 int err; 538 539 if (!data_buf || data_len < 4) 540 data_len = 0; 541 542 if (!scsi_nl_sock) { 543 err = -ENOENT; 544 goto send_fail; 545 } 546 547 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 548 549 skb = nlmsg_new(len, GFP_KERNEL); 550 if (!skb) { 551 err = -ENOBUFS; 552 goto send_fail; 553 } 554 555 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 556 if (!nlh) { 557 err = -ENOBUFS; 558 goto send_fail_skb; 559 } 560 event = nlmsg_data(nlh); 561 562 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 563 FC_NL_ASYNC_EVENT, len); 564 event->seconds = ktime_get_real_seconds(); 565 event->vendor_id = vendor_id; 566 event->host_no = shost->host_no; 567 event->event_datalen = data_len; /* bytes */ 568 event->event_num = event_number; 569 event->event_code = event_code; 570 if (data_len) 571 memcpy(&event->event_data, data_buf, data_len); 572 573 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 574 GFP_KERNEL); 575 return; 576 577send_fail_skb: 578 kfree_skb(skb); 579send_fail: 580 name = get_fc_host_event_code_name(event_code); 581 printk(KERN_WARNING 582 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 583 __func__, shost->host_no, 584 (name) ? name : "<unknown>", 585 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err); 586 return; 587} 588EXPORT_SYMBOL(fc_host_post_fc_event); 589 590/** 591 * fc_host_post_event - called to post an even on an fc_host. 592 * @shost: host the event occurred on 593 * @event_number: fc event number obtained from get_fc_event_number() 594 * @event_code: fc_host event being posted 595 * @event_data: 32bits of data for the event being posted 596 * 597 * Notes: 598 * This routine assumes no locks are held on entry. 599 */ 600void 601fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 602 enum fc_host_event_code event_code, u32 event_data) 603{ 604 fc_host_post_fc_event(shost, event_number, event_code, 605 (u32)sizeof(u32), (char *)&event_data, 0); 606} 607EXPORT_SYMBOL(fc_host_post_event); 608 609 610/** 611 * fc_host_post_vendor_event - called to post a vendor unique event 612 * on an fc_host 613 * @shost: host the event occurred on 614 * @event_number: fc event number obtained from get_fc_event_number() 615 * @data_len: amount, in bytes, of vendor unique data 616 * @data_buf: pointer to vendor unique data 617 * @vendor_id: Vendor id 618 * 619 * Notes: 620 * This routine assumes no locks are held on entry. 621 */ 622void 623fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 624 u32 data_len, char * data_buf, u64 vendor_id) 625{ 626 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE, 627 data_len, data_buf, vendor_id); 628} 629EXPORT_SYMBOL(fc_host_post_vendor_event); 630 631/** 632 * fc_host_rcv_fpin - routine to process a received FPIN. 633 * @shost: host the FPIN was received on 634 * @fpin_len: length of FPIN payload, in bytes 635 * @fpin_buf: pointer to FPIN payload 636 * 637 * Notes: 638 * This routine assumes no locks are held on entry. 639 */ 640void 641fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf) 642{ 643 fc_host_post_fc_event(shost, fc_get_event_number(), 644 FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0); 645} 646EXPORT_SYMBOL(fc_host_fpin_rcv); 647 648 649static __init int fc_transport_init(void) 650{ 651 int error; 652 653 atomic_set(&fc_event_seq, 0); 654 655 error = transport_class_register(&fc_host_class); 656 if (error) 657 return error; 658 error = transport_class_register(&fc_vport_class); 659 if (error) 660 goto unreg_host_class; 661 error = transport_class_register(&fc_rport_class); 662 if (error) 663 goto unreg_vport_class; 664 error = transport_class_register(&fc_transport_class); 665 if (error) 666 goto unreg_rport_class; 667 return 0; 668 669unreg_rport_class: 670 transport_class_unregister(&fc_rport_class); 671unreg_vport_class: 672 transport_class_unregister(&fc_vport_class); 673unreg_host_class: 674 transport_class_unregister(&fc_host_class); 675 return error; 676} 677 678static void __exit fc_transport_exit(void) 679{ 680 transport_class_unregister(&fc_transport_class); 681 transport_class_unregister(&fc_rport_class); 682 transport_class_unregister(&fc_host_class); 683 transport_class_unregister(&fc_vport_class); 684} 685 686/* 687 * FC Remote Port Attribute Management 688 */ 689 690#define fc_rport_show_function(field, format_string, sz, cast) \ 691static ssize_t \ 692show_fc_rport_##field (struct device *dev, \ 693 struct device_attribute *attr, char *buf) \ 694{ \ 695 struct fc_rport *rport = transport_class_to_rport(dev); \ 696 struct Scsi_Host *shost = rport_to_shost(rport); \ 697 struct fc_internal *i = to_fc_internal(shost->transportt); \ 698 if ((i->f->get_rport_##field) && \ 699 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 700 (rport->port_state == FC_PORTSTATE_DELETED) || \ 701 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 702 i->f->get_rport_##field(rport); \ 703 return snprintf(buf, sz, format_string, cast rport->field); \ 704} 705 706#define fc_rport_store_function(field) \ 707static ssize_t \ 708store_fc_rport_##field(struct device *dev, \ 709 struct device_attribute *attr, \ 710 const char *buf, size_t count) \ 711{ \ 712 int val; \ 713 struct fc_rport *rport = transport_class_to_rport(dev); \ 714 struct Scsi_Host *shost = rport_to_shost(rport); \ 715 struct fc_internal *i = to_fc_internal(shost->transportt); \ 716 char *cp; \ 717 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 718 (rport->port_state == FC_PORTSTATE_DELETED) || \ 719 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 720 return -EBUSY; \ 721 val = simple_strtoul(buf, &cp, 0); \ 722 if (*cp && (*cp != '\n')) \ 723 return -EINVAL; \ 724 i->f->set_rport_##field(rport, val); \ 725 return count; \ 726} 727 728#define fc_rport_rd_attr(field, format_string, sz) \ 729 fc_rport_show_function(field, format_string, sz, ) \ 730static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 731 show_fc_rport_##field, NULL) 732 733#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 734 fc_rport_show_function(field, format_string, sz, (cast)) \ 735static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 736 show_fc_rport_##field, NULL) 737 738#define fc_rport_rw_attr(field, format_string, sz) \ 739 fc_rport_show_function(field, format_string, sz, ) \ 740 fc_rport_store_function(field) \ 741static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 742 show_fc_rport_##field, \ 743 store_fc_rport_##field) 744 745 746#define fc_private_rport_show_function(field, format_string, sz, cast) \ 747static ssize_t \ 748show_fc_rport_##field (struct device *dev, \ 749 struct device_attribute *attr, char *buf) \ 750{ \ 751 struct fc_rport *rport = transport_class_to_rport(dev); \ 752 return snprintf(buf, sz, format_string, cast rport->field); \ 753} 754 755#define fc_private_rport_rd_attr(field, format_string, sz) \ 756 fc_private_rport_show_function(field, format_string, sz, ) \ 757static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 758 show_fc_rport_##field, NULL) 759 760#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 761 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 762static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 763 show_fc_rport_##field, NULL) 764 765 766#define fc_private_rport_rd_enum_attr(title, maxlen) \ 767static ssize_t \ 768show_fc_rport_##title (struct device *dev, \ 769 struct device_attribute *attr, char *buf) \ 770{ \ 771 struct fc_rport *rport = transport_class_to_rport(dev); \ 772 const char *name; \ 773 name = get_fc_##title##_name(rport->title); \ 774 if (!name) \ 775 return -EINVAL; \ 776 return snprintf(buf, maxlen, "%s\n", name); \ 777} \ 778static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 779 show_fc_rport_##title, NULL) 780 781 782#define SETUP_RPORT_ATTRIBUTE_RD(field) \ 783 i->private_rport_attrs[count] = device_attr_rport_##field; \ 784 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 785 i->private_rport_attrs[count].store = NULL; \ 786 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 787 if (i->f->show_rport_##field) \ 788 count++ 789 790#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 791 i->private_rport_attrs[count] = device_attr_rport_##field; \ 792 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 793 i->private_rport_attrs[count].store = NULL; \ 794 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 795 count++ 796 797#define SETUP_RPORT_ATTRIBUTE_RW(field) \ 798 i->private_rport_attrs[count] = device_attr_rport_##field; \ 799 if (!i->f->set_rport_##field) { \ 800 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 801 i->private_rport_attrs[count].store = NULL; \ 802 } \ 803 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 804 if (i->f->show_rport_##field) \ 805 count++ 806 807#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 808{ \ 809 i->private_rport_attrs[count] = device_attr_rport_##field; \ 810 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 811 count++; \ 812} 813 814 815/* The FC Transport Remote Port Attributes: */ 816 817/* Fixed Remote Port Attributes */ 818 819fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 820 821static ssize_t 822show_fc_rport_supported_classes (struct device *dev, 823 struct device_attribute *attr, char *buf) 824{ 825 struct fc_rport *rport = transport_class_to_rport(dev); 826 if (rport->supported_classes == FC_COS_UNSPECIFIED) 827 return snprintf(buf, 20, "unspecified\n"); 828 return get_fc_cos_names(rport->supported_classes, buf); 829} 830static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 831 show_fc_rport_supported_classes, NULL); 832 833/* Dynamic Remote Port Attributes */ 834 835/* 836 * dev_loss_tmo attribute 837 */ 838static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 839{ 840 char *cp; 841 842 *val = simple_strtoul(buf, &cp, 0); 843 if (*cp && (*cp != '\n')) 844 return -EINVAL; 845 /* 846 * Check for overflow; dev_loss_tmo is u32 847 */ 848 if (*val > UINT_MAX) 849 return -EINVAL; 850 851 return 0; 852} 853 854static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 855 unsigned long val) 856{ 857 struct Scsi_Host *shost = rport_to_shost(rport); 858 struct fc_internal *i = to_fc_internal(shost->transportt); 859 860 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 861 (rport->port_state == FC_PORTSTATE_DELETED) || 862 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 863 return -EBUSY; 864 /* 865 * Check for overflow; dev_loss_tmo is u32 866 */ 867 if (val > UINT_MAX) 868 return -EINVAL; 869 870 /* 871 * If fast_io_fail is off we have to cap 872 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 873 */ 874 if (rport->fast_io_fail_tmo == -1 && 875 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 876 return -EINVAL; 877 878 i->f->set_rport_dev_loss_tmo(rport, val); 879 return 0; 880} 881 882fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 883static ssize_t 884store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 885 const char *buf, size_t count) 886{ 887 struct fc_rport *rport = transport_class_to_rport(dev); 888 unsigned long val; 889 int rc; 890 891 rc = fc_str_to_dev_loss(buf, &val); 892 if (rc) 893 return rc; 894 895 rc = fc_rport_set_dev_loss_tmo(rport, val); 896 if (rc) 897 return rc; 898 return count; 899} 900static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 901 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 902 903 904/* Private Remote Port Attributes */ 905 906fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 907fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 908fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 909 910static ssize_t 911show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 912 char *buf) 913{ 914 struct fc_rport *rport = transport_class_to_rport(dev); 915 916 /* identify any roles that are port_id specific */ 917 if ((rport->port_id != -1) && 918 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 919 FC_WELLKNOWN_PORTID_MASK) { 920 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 921 case FC_FPORT_PORTID: 922 return snprintf(buf, 30, "Fabric Port\n"); 923 case FC_FABCTLR_PORTID: 924 return snprintf(buf, 30, "Fabric Controller\n"); 925 case FC_DIRSRVR_PORTID: 926 return snprintf(buf, 30, "Directory Server\n"); 927 case FC_TIMESRVR_PORTID: 928 return snprintf(buf, 30, "Time Server\n"); 929 case FC_MGMTSRVR_PORTID: 930 return snprintf(buf, 30, "Management Server\n"); 931 default: 932 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 933 } 934 } else { 935 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 936 return snprintf(buf, 20, "unknown\n"); 937 return get_fc_port_roles_names(rport->roles, buf); 938 } 939} 940static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 941 show_fc_rport_roles, NULL); 942 943fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 944fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 945 946/* 947 * fast_io_fail_tmo attribute 948 */ 949static ssize_t 950show_fc_rport_fast_io_fail_tmo (struct device *dev, 951 struct device_attribute *attr, char *buf) 952{ 953 struct fc_rport *rport = transport_class_to_rport(dev); 954 955 if (rport->fast_io_fail_tmo == -1) 956 return snprintf(buf, 5, "off\n"); 957 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 958} 959 960static ssize_t 961store_fc_rport_fast_io_fail_tmo(struct device *dev, 962 struct device_attribute *attr, const char *buf, 963 size_t count) 964{ 965 int val; 966 char *cp; 967 struct fc_rport *rport = transport_class_to_rport(dev); 968 969 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 970 (rport->port_state == FC_PORTSTATE_DELETED) || 971 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 972 return -EBUSY; 973 if (strncmp(buf, "off", 3) == 0) 974 rport->fast_io_fail_tmo = -1; 975 else { 976 val = simple_strtoul(buf, &cp, 0); 977 if ((*cp && (*cp != '\n')) || (val < 0)) 978 return -EINVAL; 979 /* 980 * Cap fast_io_fail by dev_loss_tmo or 981 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 982 */ 983 if ((val >= rport->dev_loss_tmo) || 984 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 985 return -EINVAL; 986 987 rport->fast_io_fail_tmo = val; 988 } 989 return count; 990} 991static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 992 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 993 994 995/* 996 * FC SCSI Target Attribute Management 997 */ 998 999/* 1000 * Note: in the target show function we recognize when the remote 1001 * port is in the hierarchy and do not allow the driver to get 1002 * involved in sysfs functions. The driver only gets involved if 1003 * it's the "old" style that doesn't use rports. 1004 */ 1005#define fc_starget_show_function(field, format_string, sz, cast) \ 1006static ssize_t \ 1007show_fc_starget_##field (struct device *dev, \ 1008 struct device_attribute *attr, char *buf) \ 1009{ \ 1010 struct scsi_target *starget = transport_class_to_starget(dev); \ 1011 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1012 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1013 struct fc_rport *rport = starget_to_rport(starget); \ 1014 if (rport) \ 1015 fc_starget_##field(starget) = rport->field; \ 1016 else if (i->f->get_starget_##field) \ 1017 i->f->get_starget_##field(starget); \ 1018 return snprintf(buf, sz, format_string, \ 1019 cast fc_starget_##field(starget)); \ 1020} 1021 1022#define fc_starget_rd_attr(field, format_string, sz) \ 1023 fc_starget_show_function(field, format_string, sz, ) \ 1024static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1025 show_fc_starget_##field, NULL) 1026 1027#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1028 fc_starget_show_function(field, format_string, sz, (cast)) \ 1029static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1030 show_fc_starget_##field, NULL) 1031 1032#define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1033 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1034 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1035 i->private_starget_attrs[count].store = NULL; \ 1036 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1037 if (i->f->show_starget_##field) \ 1038 count++ 1039 1040#define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1041 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1042 if (!i->f->set_starget_##field) { \ 1043 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1044 i->private_starget_attrs[count].store = NULL; \ 1045 } \ 1046 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1047 if (i->f->show_starget_##field) \ 1048 count++ 1049 1050/* The FC Transport SCSI Target Attributes: */ 1051fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1052fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1053fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1054 1055 1056/* 1057 * FC Virtual Port Attribute Management 1058 */ 1059 1060#define fc_vport_show_function(field, format_string, sz, cast) \ 1061static ssize_t \ 1062show_fc_vport_##field (struct device *dev, \ 1063 struct device_attribute *attr, char *buf) \ 1064{ \ 1065 struct fc_vport *vport = transport_class_to_vport(dev); \ 1066 struct Scsi_Host *shost = vport_to_shost(vport); \ 1067 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1068 if ((i->f->get_vport_##field) && \ 1069 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1070 i->f->get_vport_##field(vport); \ 1071 return snprintf(buf, sz, format_string, cast vport->field); \ 1072} 1073 1074#define fc_vport_store_function(field) \ 1075static ssize_t \ 1076store_fc_vport_##field(struct device *dev, \ 1077 struct device_attribute *attr, \ 1078 const char *buf, size_t count) \ 1079{ \ 1080 int val; \ 1081 struct fc_vport *vport = transport_class_to_vport(dev); \ 1082 struct Scsi_Host *shost = vport_to_shost(vport); \ 1083 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1084 char *cp; \ 1085 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1086 return -EBUSY; \ 1087 val = simple_strtoul(buf, &cp, 0); \ 1088 if (*cp && (*cp != '\n')) \ 1089 return -EINVAL; \ 1090 i->f->set_vport_##field(vport, val); \ 1091 return count; \ 1092} 1093 1094#define fc_vport_store_str_function(field, slen) \ 1095static ssize_t \ 1096store_fc_vport_##field(struct device *dev, \ 1097 struct device_attribute *attr, \ 1098 const char *buf, size_t count) \ 1099{ \ 1100 struct fc_vport *vport = transport_class_to_vport(dev); \ 1101 struct Scsi_Host *shost = vport_to_shost(vport); \ 1102 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1103 unsigned int cnt=count; \ 1104 \ 1105 /* count may include a LF at end of string */ \ 1106 if (buf[cnt-1] == '\n') \ 1107 cnt--; \ 1108 if (cnt > ((slen) - 1)) \ 1109 return -EINVAL; \ 1110 memcpy(vport->field, buf, cnt); \ 1111 i->f->set_vport_##field(vport); \ 1112 return count; \ 1113} 1114 1115#define fc_vport_rd_attr(field, format_string, sz) \ 1116 fc_vport_show_function(field, format_string, sz, ) \ 1117static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1118 show_fc_vport_##field, NULL) 1119 1120#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1121 fc_vport_show_function(field, format_string, sz, (cast)) \ 1122static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1123 show_fc_vport_##field, NULL) 1124 1125#define fc_vport_rw_attr(field, format_string, sz) \ 1126 fc_vport_show_function(field, format_string, sz, ) \ 1127 fc_vport_store_function(field) \ 1128static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1129 show_fc_vport_##field, \ 1130 store_fc_vport_##field) 1131 1132#define fc_private_vport_show_function(field, format_string, sz, cast) \ 1133static ssize_t \ 1134show_fc_vport_##field (struct device *dev, \ 1135 struct device_attribute *attr, char *buf) \ 1136{ \ 1137 struct fc_vport *vport = transport_class_to_vport(dev); \ 1138 return snprintf(buf, sz, format_string, cast vport->field); \ 1139} 1140 1141#define fc_private_vport_store_u32_function(field) \ 1142static ssize_t \ 1143store_fc_vport_##field(struct device *dev, \ 1144 struct device_attribute *attr, \ 1145 const char *buf, size_t count) \ 1146{ \ 1147 u32 val; \ 1148 struct fc_vport *vport = transport_class_to_vport(dev); \ 1149 char *cp; \ 1150 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1151 return -EBUSY; \ 1152 val = simple_strtoul(buf, &cp, 0); \ 1153 if (*cp && (*cp != '\n')) \ 1154 return -EINVAL; \ 1155 vport->field = val; \ 1156 return count; \ 1157} 1158 1159 1160#define fc_private_vport_rd_attr(field, format_string, sz) \ 1161 fc_private_vport_show_function(field, format_string, sz, ) \ 1162static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1163 show_fc_vport_##field, NULL) 1164 1165#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1166 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1167static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1168 show_fc_vport_##field, NULL) 1169 1170#define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1171 fc_private_vport_show_function(field, format_string, sz, ) \ 1172 fc_private_vport_store_u32_function(field) \ 1173static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1174 show_fc_vport_##field, \ 1175 store_fc_vport_##field) 1176 1177 1178#define fc_private_vport_rd_enum_attr(title, maxlen) \ 1179static ssize_t \ 1180show_fc_vport_##title (struct device *dev, \ 1181 struct device_attribute *attr, \ 1182 char *buf) \ 1183{ \ 1184 struct fc_vport *vport = transport_class_to_vport(dev); \ 1185 const char *name; \ 1186 name = get_fc_##title##_name(vport->title); \ 1187 if (!name) \ 1188 return -EINVAL; \ 1189 return snprintf(buf, maxlen, "%s\n", name); \ 1190} \ 1191static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1192 show_fc_vport_##title, NULL) 1193 1194 1195#define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1196 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1197 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1198 i->private_vport_attrs[count].store = NULL; \ 1199 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1200 if (i->f->get_##field) \ 1201 count++ 1202 /* NOTE: Above MACRO differs: checks function not show bit */ 1203 1204#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1205 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1206 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1207 i->private_vport_attrs[count].store = NULL; \ 1208 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1209 count++ 1210 1211#define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1212 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1213 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1214 if (i->f->field) \ 1215 count++ 1216 /* NOTE: Above MACRO differs: checks function */ 1217 1218#define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1219 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1220 if (!i->f->set_vport_##field) { \ 1221 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1222 i->private_vport_attrs[count].store = NULL; \ 1223 } \ 1224 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1225 count++ 1226 /* NOTE: Above MACRO differs: does not check show bit */ 1227 1228#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1229{ \ 1230 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1231 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1232 count++; \ 1233} 1234 1235 1236/* The FC Transport Virtual Port Attributes: */ 1237 1238/* Fixed Virtual Port Attributes */ 1239 1240/* Dynamic Virtual Port Attributes */ 1241 1242/* Private Virtual Port Attributes */ 1243 1244fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1245fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1246fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1247fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1248 1249static ssize_t 1250show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1251 char *buf) 1252{ 1253 struct fc_vport *vport = transport_class_to_vport(dev); 1254 1255 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1256 return snprintf(buf, 20, "unknown\n"); 1257 return get_fc_port_roles_names(vport->roles, buf); 1258} 1259static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1260 1261fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1262 1263fc_private_vport_show_function(symbolic_name, "%s\n", 1264 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1265fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1266static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1267 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1268 1269static ssize_t 1270store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1271 const char *buf, size_t count) 1272{ 1273 struct fc_vport *vport = transport_class_to_vport(dev); 1274 struct Scsi_Host *shost = vport_to_shost(vport); 1275 unsigned long flags; 1276 1277 spin_lock_irqsave(shost->host_lock, flags); 1278 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) { 1279 spin_unlock_irqrestore(shost->host_lock, flags); 1280 return -EBUSY; 1281 } 1282 vport->flags |= FC_VPORT_DELETING; 1283 spin_unlock_irqrestore(shost->host_lock, flags); 1284 1285 fc_queue_work(shost, &vport->vport_delete_work); 1286 return count; 1287} 1288static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1289 NULL, store_fc_vport_delete); 1290 1291 1292/* 1293 * Enable/Disable vport 1294 * Write "1" to disable, write "0" to enable 1295 */ 1296static ssize_t 1297store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1298 const char *buf, 1299 size_t count) 1300{ 1301 struct fc_vport *vport = transport_class_to_vport(dev); 1302 struct Scsi_Host *shost = vport_to_shost(vport); 1303 struct fc_internal *i = to_fc_internal(shost->transportt); 1304 int stat; 1305 1306 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1307 return -EBUSY; 1308 1309 if (*buf == '0') { 1310 if (vport->vport_state != FC_VPORT_DISABLED) 1311 return -EALREADY; 1312 } else if (*buf == '1') { 1313 if (vport->vport_state == FC_VPORT_DISABLED) 1314 return -EALREADY; 1315 } else 1316 return -EINVAL; 1317 1318 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1319 return stat ? stat : count; 1320} 1321static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1322 NULL, store_fc_vport_disable); 1323 1324 1325/* 1326 * Host Attribute Management 1327 */ 1328 1329#define fc_host_show_function(field, format_string, sz, cast) \ 1330static ssize_t \ 1331show_fc_host_##field (struct device *dev, \ 1332 struct device_attribute *attr, char *buf) \ 1333{ \ 1334 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1335 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1336 if (i->f->get_host_##field) \ 1337 i->f->get_host_##field(shost); \ 1338 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1339} 1340 1341#define fc_host_store_function(field) \ 1342static ssize_t \ 1343store_fc_host_##field(struct device *dev, \ 1344 struct device_attribute *attr, \ 1345 const char *buf, size_t count) \ 1346{ \ 1347 int val; \ 1348 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1349 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1350 char *cp; \ 1351 \ 1352 val = simple_strtoul(buf, &cp, 0); \ 1353 if (*cp && (*cp != '\n')) \ 1354 return -EINVAL; \ 1355 i->f->set_host_##field(shost, val); \ 1356 return count; \ 1357} 1358 1359#define fc_host_store_str_function(field, slen) \ 1360static ssize_t \ 1361store_fc_host_##field(struct device *dev, \ 1362 struct device_attribute *attr, \ 1363 const char *buf, size_t count) \ 1364{ \ 1365 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1366 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1367 unsigned int cnt=count; \ 1368 \ 1369 /* count may include a LF at end of string */ \ 1370 if (buf[cnt-1] == '\n') \ 1371 cnt--; \ 1372 if (cnt > ((slen) - 1)) \ 1373 return -EINVAL; \ 1374 memcpy(fc_host_##field(shost), buf, cnt); \ 1375 i->f->set_host_##field(shost); \ 1376 return count; \ 1377} 1378 1379#define fc_host_rd_attr(field, format_string, sz) \ 1380 fc_host_show_function(field, format_string, sz, ) \ 1381static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1382 show_fc_host_##field, NULL) 1383 1384#define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1385 fc_host_show_function(field, format_string, sz, (cast)) \ 1386static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1387 show_fc_host_##field, NULL) 1388 1389#define fc_host_rw_attr(field, format_string, sz) \ 1390 fc_host_show_function(field, format_string, sz, ) \ 1391 fc_host_store_function(field) \ 1392static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1393 show_fc_host_##field, \ 1394 store_fc_host_##field) 1395 1396#define fc_host_rd_enum_attr(title, maxlen) \ 1397static ssize_t \ 1398show_fc_host_##title (struct device *dev, \ 1399 struct device_attribute *attr, char *buf) \ 1400{ \ 1401 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1402 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1403 const char *name; \ 1404 if (i->f->get_host_##title) \ 1405 i->f->get_host_##title(shost); \ 1406 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1407 if (!name) \ 1408 return -EINVAL; \ 1409 return snprintf(buf, maxlen, "%s\n", name); \ 1410} \ 1411static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1412 1413#define SETUP_HOST_ATTRIBUTE_RD(field) \ 1414 i->private_host_attrs[count] = device_attr_host_##field; \ 1415 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1416 i->private_host_attrs[count].store = NULL; \ 1417 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1418 if (i->f->show_host_##field) \ 1419 count++ 1420 1421#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1422 i->private_host_attrs[count] = device_attr_host_##field; \ 1423 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1424 i->private_host_attrs[count].store = NULL; \ 1425 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1426 count++ 1427 1428#define SETUP_HOST_ATTRIBUTE_RW(field) \ 1429 i->private_host_attrs[count] = device_attr_host_##field; \ 1430 if (!i->f->set_host_##field) { \ 1431 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1432 i->private_host_attrs[count].store = NULL; \ 1433 } \ 1434 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1435 if (i->f->show_host_##field) \ 1436 count++ 1437 1438 1439#define fc_private_host_show_function(field, format_string, sz, cast) \ 1440static ssize_t \ 1441show_fc_host_##field (struct device *dev, \ 1442 struct device_attribute *attr, char *buf) \ 1443{ \ 1444 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1445 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1446} 1447 1448#define fc_private_host_rd_attr(field, format_string, sz) \ 1449 fc_private_host_show_function(field, format_string, sz, ) \ 1450static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1451 show_fc_host_##field, NULL) 1452 1453#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1454 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1455static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1456 show_fc_host_##field, NULL) 1457 1458#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1459 i->private_host_attrs[count] = device_attr_host_##field; \ 1460 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1461 i->private_host_attrs[count].store = NULL; \ 1462 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1463 count++ 1464 1465#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1466{ \ 1467 i->private_host_attrs[count] = device_attr_host_##field; \ 1468 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1469 count++; \ 1470} 1471 1472 1473/* Fixed Host Attributes */ 1474 1475static ssize_t 1476show_fc_host_supported_classes (struct device *dev, 1477 struct device_attribute *attr, char *buf) 1478{ 1479 struct Scsi_Host *shost = transport_class_to_shost(dev); 1480 1481 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1482 return snprintf(buf, 20, "unspecified\n"); 1483 1484 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1485} 1486static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1487 show_fc_host_supported_classes, NULL); 1488 1489static ssize_t 1490show_fc_host_supported_fc4s (struct device *dev, 1491 struct device_attribute *attr, char *buf) 1492{ 1493 struct Scsi_Host *shost = transport_class_to_shost(dev); 1494 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1495} 1496static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1497 show_fc_host_supported_fc4s, NULL); 1498 1499static ssize_t 1500show_fc_host_supported_speeds (struct device *dev, 1501 struct device_attribute *attr, char *buf) 1502{ 1503 struct Scsi_Host *shost = transport_class_to_shost(dev); 1504 1505 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1506 return snprintf(buf, 20, "unknown\n"); 1507 1508 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1509} 1510static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1511 show_fc_host_supported_speeds, NULL); 1512 1513 1514fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1515fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1516fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1517 unsigned long long); 1518fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1519fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1520fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1521fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1522fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1523fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1524fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1525fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1526fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1527fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1528 1529 1530/* Dynamic Host Attributes */ 1531 1532static ssize_t 1533show_fc_host_active_fc4s (struct device *dev, 1534 struct device_attribute *attr, char *buf) 1535{ 1536 struct Scsi_Host *shost = transport_class_to_shost(dev); 1537 struct fc_internal *i = to_fc_internal(shost->transportt); 1538 1539 if (i->f->get_host_active_fc4s) 1540 i->f->get_host_active_fc4s(shost); 1541 1542 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1543} 1544static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1545 show_fc_host_active_fc4s, NULL); 1546 1547static ssize_t 1548show_fc_host_speed (struct device *dev, 1549 struct device_attribute *attr, char *buf) 1550{ 1551 struct Scsi_Host *shost = transport_class_to_shost(dev); 1552 struct fc_internal *i = to_fc_internal(shost->transportt); 1553 1554 if (i->f->get_host_speed) 1555 i->f->get_host_speed(shost); 1556 1557 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1558 return snprintf(buf, 20, "unknown\n"); 1559 1560 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1561} 1562static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1563 show_fc_host_speed, NULL); 1564 1565 1566fc_host_rd_attr(port_id, "0x%06x\n", 20); 1567fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1568fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1569fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1570fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1571 1572fc_private_host_show_function(system_hostname, "%s\n", 1573 FC_SYMBOLIC_NAME_SIZE + 1, ) 1574fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1575static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1576 show_fc_host_system_hostname, store_fc_host_system_hostname); 1577 1578 1579/* Private Host Attributes */ 1580 1581static ssize_t 1582show_fc_private_host_tgtid_bind_type(struct device *dev, 1583 struct device_attribute *attr, char *buf) 1584{ 1585 struct Scsi_Host *shost = transport_class_to_shost(dev); 1586 const char *name; 1587 1588 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1589 if (!name) 1590 return -EINVAL; 1591 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1592} 1593 1594#define get_list_head_entry(pos, head, member) \ 1595 pos = list_entry((head)->next, typeof(*pos), member) 1596 1597static ssize_t 1598store_fc_private_host_tgtid_bind_type(struct device *dev, 1599 struct device_attribute *attr, const char *buf, size_t count) 1600{ 1601 struct Scsi_Host *shost = transport_class_to_shost(dev); 1602 struct fc_rport *rport; 1603 enum fc_tgtid_binding_type val; 1604 unsigned long flags; 1605 1606 if (get_fc_tgtid_bind_type_match(buf, &val)) 1607 return -EINVAL; 1608 1609 /* if changing bind type, purge all unused consistent bindings */ 1610 if (val != fc_host_tgtid_bind_type(shost)) { 1611 spin_lock_irqsave(shost->host_lock, flags); 1612 while (!list_empty(&fc_host_rport_bindings(shost))) { 1613 get_list_head_entry(rport, 1614 &fc_host_rport_bindings(shost), peers); 1615 list_del(&rport->peers); 1616 rport->port_state = FC_PORTSTATE_DELETED; 1617 fc_queue_work(shost, &rport->rport_delete_work); 1618 } 1619 spin_unlock_irqrestore(shost->host_lock, flags); 1620 } 1621 1622 fc_host_tgtid_bind_type(shost) = val; 1623 return count; 1624} 1625 1626static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1627 show_fc_private_host_tgtid_bind_type, 1628 store_fc_private_host_tgtid_bind_type); 1629 1630static ssize_t 1631store_fc_private_host_issue_lip(struct device *dev, 1632 struct device_attribute *attr, const char *buf, size_t count) 1633{ 1634 struct Scsi_Host *shost = transport_class_to_shost(dev); 1635 struct fc_internal *i = to_fc_internal(shost->transportt); 1636 int ret; 1637 1638 /* ignore any data value written to the attribute */ 1639 if (i->f->issue_fc_host_lip) { 1640 ret = i->f->issue_fc_host_lip(shost); 1641 return ret ? ret: count; 1642 } 1643 1644 return -ENOENT; 1645} 1646 1647static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1648 store_fc_private_host_issue_lip); 1649 1650static ssize_t 1651store_fc_private_host_dev_loss_tmo(struct device *dev, 1652 struct device_attribute *attr, 1653 const char *buf, size_t count) 1654{ 1655 struct Scsi_Host *shost = transport_class_to_shost(dev); 1656 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1657 struct fc_rport *rport; 1658 unsigned long val, flags; 1659 int rc; 1660 1661 rc = fc_str_to_dev_loss(buf, &val); 1662 if (rc) 1663 return rc; 1664 1665 fc_host_dev_loss_tmo(shost) = val; 1666 spin_lock_irqsave(shost->host_lock, flags); 1667 list_for_each_entry(rport, &fc_host->rports, peers) 1668 fc_rport_set_dev_loss_tmo(rport, val); 1669 spin_unlock_irqrestore(shost->host_lock, flags); 1670 return count; 1671} 1672 1673fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 1674static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 1675 show_fc_host_dev_loss_tmo, 1676 store_fc_private_host_dev_loss_tmo); 1677 1678fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1679 1680/* 1681 * Host Statistics Management 1682 */ 1683 1684/* Show a given attribute in the statistics group */ 1685static ssize_t 1686fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1687{ 1688 struct Scsi_Host *shost = transport_class_to_shost(dev); 1689 struct fc_internal *i = to_fc_internal(shost->transportt); 1690 struct fc_host_statistics *stats; 1691 ssize_t ret = -ENOENT; 1692 1693 if (offset > sizeof(struct fc_host_statistics) || 1694 offset % sizeof(u64) != 0) 1695 WARN_ON(1); 1696 1697 if (i->f->get_fc_host_stats) { 1698 stats = (i->f->get_fc_host_stats)(shost); 1699 if (stats) 1700 ret = snprintf(buf, 20, "0x%llx\n", 1701 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1702 } 1703 return ret; 1704} 1705 1706 1707/* generate a read-only statistics attribute */ 1708#define fc_host_statistic(name) \ 1709static ssize_t show_fcstat_##name(struct device *cd, \ 1710 struct device_attribute *attr, \ 1711 char *buf) \ 1712{ \ 1713 return fc_stat_show(cd, buf, \ 1714 offsetof(struct fc_host_statistics, name)); \ 1715} \ 1716static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1717 1718fc_host_statistic(seconds_since_last_reset); 1719fc_host_statistic(tx_frames); 1720fc_host_statistic(tx_words); 1721fc_host_statistic(rx_frames); 1722fc_host_statistic(rx_words); 1723fc_host_statistic(lip_count); 1724fc_host_statistic(nos_count); 1725fc_host_statistic(error_frames); 1726fc_host_statistic(dumped_frames); 1727fc_host_statistic(link_failure_count); 1728fc_host_statistic(loss_of_sync_count); 1729fc_host_statistic(loss_of_signal_count); 1730fc_host_statistic(prim_seq_protocol_err_count); 1731fc_host_statistic(invalid_tx_word_count); 1732fc_host_statistic(invalid_crc_count); 1733fc_host_statistic(fcp_input_requests); 1734fc_host_statistic(fcp_output_requests); 1735fc_host_statistic(fcp_control_requests); 1736fc_host_statistic(fcp_input_megabytes); 1737fc_host_statistic(fcp_output_megabytes); 1738fc_host_statistic(fcp_packet_alloc_failures); 1739fc_host_statistic(fcp_packet_aborts); 1740fc_host_statistic(fcp_frame_alloc_failures); 1741fc_host_statistic(fc_no_free_exch); 1742fc_host_statistic(fc_no_free_exch_xid); 1743fc_host_statistic(fc_xid_not_found); 1744fc_host_statistic(fc_xid_busy); 1745fc_host_statistic(fc_seq_not_found); 1746fc_host_statistic(fc_non_bls_resp); 1747 1748static ssize_t 1749fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1750 const char *buf, size_t count) 1751{ 1752 struct Scsi_Host *shost = transport_class_to_shost(dev); 1753 struct fc_internal *i = to_fc_internal(shost->transportt); 1754 1755 /* ignore any data value written to the attribute */ 1756 if (i->f->reset_fc_host_stats) { 1757 i->f->reset_fc_host_stats(shost); 1758 return count; 1759 } 1760 1761 return -ENOENT; 1762} 1763static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1764 fc_reset_statistics); 1765 1766static struct attribute *fc_statistics_attrs[] = { 1767 &device_attr_host_seconds_since_last_reset.attr, 1768 &device_attr_host_tx_frames.attr, 1769 &device_attr_host_tx_words.attr, 1770 &device_attr_host_rx_frames.attr, 1771 &device_attr_host_rx_words.attr, 1772 &device_attr_host_lip_count.attr, 1773 &device_attr_host_nos_count.attr, 1774 &device_attr_host_error_frames.attr, 1775 &device_attr_host_dumped_frames.attr, 1776 &device_attr_host_link_failure_count.attr, 1777 &device_attr_host_loss_of_sync_count.attr, 1778 &device_attr_host_loss_of_signal_count.attr, 1779 &device_attr_host_prim_seq_protocol_err_count.attr, 1780 &device_attr_host_invalid_tx_word_count.attr, 1781 &device_attr_host_invalid_crc_count.attr, 1782 &device_attr_host_fcp_input_requests.attr, 1783 &device_attr_host_fcp_output_requests.attr, 1784 &device_attr_host_fcp_control_requests.attr, 1785 &device_attr_host_fcp_input_megabytes.attr, 1786 &device_attr_host_fcp_output_megabytes.attr, 1787 &device_attr_host_fcp_packet_alloc_failures.attr, 1788 &device_attr_host_fcp_packet_aborts.attr, 1789 &device_attr_host_fcp_frame_alloc_failures.attr, 1790 &device_attr_host_fc_no_free_exch.attr, 1791 &device_attr_host_fc_no_free_exch_xid.attr, 1792 &device_attr_host_fc_xid_not_found.attr, 1793 &device_attr_host_fc_xid_busy.attr, 1794 &device_attr_host_fc_seq_not_found.attr, 1795 &device_attr_host_fc_non_bls_resp.attr, 1796 &device_attr_host_reset_statistics.attr, 1797 NULL 1798}; 1799 1800static struct attribute_group fc_statistics_group = { 1801 .name = "statistics", 1802 .attrs = fc_statistics_attrs, 1803}; 1804 1805 1806/* Host Vport Attributes */ 1807 1808static int 1809fc_parse_wwn(const char *ns, u64 *nm) 1810{ 1811 unsigned int i, j; 1812 u8 wwn[8]; 1813 1814 memset(wwn, 0, sizeof(wwn)); 1815 1816 /* Validate and store the new name */ 1817 for (i=0, j=0; i < 16; i++) { 1818 int value; 1819 1820 value = hex_to_bin(*ns++); 1821 if (value >= 0) 1822 j = (j << 4) | value; 1823 else 1824 return -EINVAL; 1825 if (i % 2) { 1826 wwn[i/2] = j & 0xff; 1827 j = 0; 1828 } 1829 } 1830 1831 *nm = wwn_to_u64(wwn); 1832 1833 return 0; 1834} 1835 1836 1837/* 1838 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1839 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1840 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1841 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1842 */ 1843static ssize_t 1844store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1845 const char *buf, size_t count) 1846{ 1847 struct Scsi_Host *shost = transport_class_to_shost(dev); 1848 struct fc_vport_identifiers vid; 1849 struct fc_vport *vport; 1850 unsigned int cnt=count; 1851 int stat; 1852 1853 memset(&vid, 0, sizeof(vid)); 1854 1855 /* count may include a LF at end of string */ 1856 if (buf[cnt-1] == '\n') 1857 cnt--; 1858 1859 /* validate we have enough characters for WWPN */ 1860 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1861 return -EINVAL; 1862 1863 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1864 if (stat) 1865 return stat; 1866 1867 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1868 if (stat) 1869 return stat; 1870 1871 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1872 vid.vport_type = FC_PORTTYPE_NPIV; 1873 /* vid.symbolic_name is already zero/NULL's */ 1874 vid.disable = false; /* always enabled */ 1875 1876 /* we only allow support on Channel 0 !!! */ 1877 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1878 return stat ? stat : count; 1879} 1880static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1881 store_fc_host_vport_create); 1882 1883 1884/* 1885 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1886 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1887 * The WWNs are specified as hex characters, and may *not* contain 1888 * any prefixes (e.g. 0x, x, etc) 1889 */ 1890static ssize_t 1891store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1892 const char *buf, size_t count) 1893{ 1894 struct Scsi_Host *shost = transport_class_to_shost(dev); 1895 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1896 struct fc_vport *vport; 1897 u64 wwpn, wwnn; 1898 unsigned long flags; 1899 unsigned int cnt=count; 1900 int stat, match; 1901 1902 /* count may include a LF at end of string */ 1903 if (buf[cnt-1] == '\n') 1904 cnt--; 1905 1906 /* validate we have enough characters for WWPN */ 1907 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1908 return -EINVAL; 1909 1910 stat = fc_parse_wwn(&buf[0], &wwpn); 1911 if (stat) 1912 return stat; 1913 1914 stat = fc_parse_wwn(&buf[17], &wwnn); 1915 if (stat) 1916 return stat; 1917 1918 spin_lock_irqsave(shost->host_lock, flags); 1919 match = 0; 1920 /* we only allow support on Channel 0 !!! */ 1921 list_for_each_entry(vport, &fc_host->vports, peers) { 1922 if ((vport->channel == 0) && 1923 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1924 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1925 break; 1926 vport->flags |= FC_VPORT_DELETING; 1927 match = 1; 1928 break; 1929 } 1930 } 1931 spin_unlock_irqrestore(shost->host_lock, flags); 1932 1933 if (!match) 1934 return -ENODEV; 1935 1936 stat = fc_vport_terminate(vport); 1937 return stat ? stat : count; 1938} 1939static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1940 store_fc_host_vport_delete); 1941 1942 1943static int fc_host_match(struct attribute_container *cont, 1944 struct device *dev) 1945{ 1946 struct Scsi_Host *shost; 1947 struct fc_internal *i; 1948 1949 if (!scsi_is_host_device(dev)) 1950 return 0; 1951 1952 shost = dev_to_shost(dev); 1953 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1954 != &fc_host_class.class) 1955 return 0; 1956 1957 i = to_fc_internal(shost->transportt); 1958 1959 return &i->t.host_attrs.ac == cont; 1960} 1961 1962static int fc_target_match(struct attribute_container *cont, 1963 struct device *dev) 1964{ 1965 struct Scsi_Host *shost; 1966 struct fc_internal *i; 1967 1968 if (!scsi_is_target_device(dev)) 1969 return 0; 1970 1971 shost = dev_to_shost(dev->parent); 1972 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1973 != &fc_host_class.class) 1974 return 0; 1975 1976 i = to_fc_internal(shost->transportt); 1977 1978 return &i->t.target_attrs.ac == cont; 1979} 1980 1981static void fc_rport_dev_release(struct device *dev) 1982{ 1983 struct fc_rport *rport = dev_to_rport(dev); 1984 put_device(dev->parent); 1985 kfree(rport); 1986} 1987 1988int scsi_is_fc_rport(const struct device *dev) 1989{ 1990 return dev->release == fc_rport_dev_release; 1991} 1992EXPORT_SYMBOL(scsi_is_fc_rport); 1993 1994static int fc_rport_match(struct attribute_container *cont, 1995 struct device *dev) 1996{ 1997 struct Scsi_Host *shost; 1998 struct fc_internal *i; 1999 2000 if (!scsi_is_fc_rport(dev)) 2001 return 0; 2002 2003 shost = dev_to_shost(dev->parent); 2004 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2005 != &fc_host_class.class) 2006 return 0; 2007 2008 i = to_fc_internal(shost->transportt); 2009 2010 return &i->rport_attr_cont.ac == cont; 2011} 2012 2013 2014static void fc_vport_dev_release(struct device *dev) 2015{ 2016 struct fc_vport *vport = dev_to_vport(dev); 2017 put_device(dev->parent); /* release kobj parent */ 2018 kfree(vport); 2019} 2020 2021static int scsi_is_fc_vport(const struct device *dev) 2022{ 2023 return dev->release == fc_vport_dev_release; 2024} 2025 2026static int fc_vport_match(struct attribute_container *cont, 2027 struct device *dev) 2028{ 2029 struct fc_vport *vport; 2030 struct Scsi_Host *shost; 2031 struct fc_internal *i; 2032 2033 if (!scsi_is_fc_vport(dev)) 2034 return 0; 2035 vport = dev_to_vport(dev); 2036 2037 shost = vport_to_shost(vport); 2038 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2039 != &fc_host_class.class) 2040 return 0; 2041 2042 i = to_fc_internal(shost->transportt); 2043 return &i->vport_attr_cont.ac == cont; 2044} 2045 2046 2047/** 2048 * fc_eh_timed_out - FC Transport I/O timeout intercept handler 2049 * @scmd: The SCSI command which timed out 2050 * 2051 * This routine protects against error handlers getting invoked while a 2052 * rport is in a blocked state, typically due to a temporarily loss of 2053 * connectivity. If the error handlers are allowed to proceed, requests 2054 * to abort i/o, reset the target, etc will likely fail as there is no way 2055 * to communicate with the device to perform the requested function. These 2056 * failures may result in the midlayer taking the device offline, requiring 2057 * manual intervention to restore operation. 2058 * 2059 * This routine, called whenever an i/o times out, validates the state of 2060 * the underlying rport. If the rport is blocked, it returns 2061 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2062 * Eventually, either the device will return, or devloss_tmo will fire, 2063 * and when the timeout then fires, it will be handled normally. 2064 * If the rport is not blocked, normal error handling continues. 2065 * 2066 * Notes: 2067 * This routine assumes no locks are held on entry. 2068 */ 2069enum blk_eh_timer_return 2070fc_eh_timed_out(struct scsi_cmnd *scmd) 2071{ 2072 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2073 2074 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2075 return BLK_EH_RESET_TIMER; 2076 2077 return BLK_EH_DONE; 2078} 2079EXPORT_SYMBOL(fc_eh_timed_out); 2080 2081/* 2082 * Called by fc_user_scan to locate an rport on the shost that 2083 * matches the channel and target id, and invoke scsi_scan_target() 2084 * on the rport. 2085 */ 2086static void 2087fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2088{ 2089 struct fc_rport *rport; 2090 unsigned long flags; 2091 2092 spin_lock_irqsave(shost->host_lock, flags); 2093 2094 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2095 if (rport->scsi_target_id == -1) 2096 continue; 2097 2098 if (rport->port_state != FC_PORTSTATE_ONLINE) 2099 continue; 2100 2101 if ((channel == rport->channel) && 2102 (id == rport->scsi_target_id)) { 2103 spin_unlock_irqrestore(shost->host_lock, flags); 2104 scsi_scan_target(&rport->dev, channel, id, lun, 2105 SCSI_SCAN_MANUAL); 2106 return; 2107 } 2108 } 2109 2110 spin_unlock_irqrestore(shost->host_lock, flags); 2111} 2112 2113/* 2114 * Called via sysfs scan routines. Necessary, as the FC transport 2115 * wants to place all target objects below the rport object. So this 2116 * routine must invoke the scsi_scan_target() routine with the rport 2117 * object as the parent. 2118 */ 2119static int 2120fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2121{ 2122 uint chlo, chhi; 2123 uint tgtlo, tgthi; 2124 2125 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2126 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2127 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2128 return -EINVAL; 2129 2130 if (channel == SCAN_WILD_CARD) { 2131 chlo = 0; 2132 chhi = shost->max_channel + 1; 2133 } else { 2134 chlo = channel; 2135 chhi = channel + 1; 2136 } 2137 2138 if (id == SCAN_WILD_CARD) { 2139 tgtlo = 0; 2140 tgthi = shost->max_id; 2141 } else { 2142 tgtlo = id; 2143 tgthi = id + 1; 2144 } 2145 2146 for ( ; chlo < chhi; chlo++) 2147 for ( ; tgtlo < tgthi; tgtlo++) 2148 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2149 2150 return 0; 2151} 2152 2153struct scsi_transport_template * 2154fc_attach_transport(struct fc_function_template *ft) 2155{ 2156 int count; 2157 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2158 GFP_KERNEL); 2159 2160 if (unlikely(!i)) 2161 return NULL; 2162 2163 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2164 i->t.target_attrs.ac.class = &fc_transport_class.class; 2165 i->t.target_attrs.ac.match = fc_target_match; 2166 i->t.target_size = sizeof(struct fc_starget_attrs); 2167 transport_container_register(&i->t.target_attrs); 2168 2169 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2170 i->t.host_attrs.ac.class = &fc_host_class.class; 2171 i->t.host_attrs.ac.match = fc_host_match; 2172 i->t.host_size = sizeof(struct fc_host_attrs); 2173 if (ft->get_fc_host_stats) 2174 i->t.host_attrs.statistics = &fc_statistics_group; 2175 transport_container_register(&i->t.host_attrs); 2176 2177 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2178 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2179 i->rport_attr_cont.ac.match = fc_rport_match; 2180 transport_container_register(&i->rport_attr_cont); 2181 2182 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2183 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2184 i->vport_attr_cont.ac.match = fc_vport_match; 2185 transport_container_register(&i->vport_attr_cont); 2186 2187 i->f = ft; 2188 2189 /* Transport uses the shost workq for scsi scanning */ 2190 i->t.create_work_queue = 1; 2191 2192 i->t.user_scan = fc_user_scan; 2193 2194 /* 2195 * Setup SCSI Target Attributes. 2196 */ 2197 count = 0; 2198 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2199 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2200 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2201 2202 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2203 2204 i->starget_attrs[count] = NULL; 2205 2206 2207 /* 2208 * Setup SCSI Host Attributes. 2209 */ 2210 count=0; 2211 SETUP_HOST_ATTRIBUTE_RD(node_name); 2212 SETUP_HOST_ATTRIBUTE_RD(port_name); 2213 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2214 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2215 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2216 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2217 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2218 if (ft->vport_create) { 2219 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2220 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2221 } 2222 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2223 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2224 SETUP_HOST_ATTRIBUTE_RD(model); 2225 SETUP_HOST_ATTRIBUTE_RD(model_description); 2226 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2227 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2228 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2229 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2230 2231 SETUP_HOST_ATTRIBUTE_RD(port_id); 2232 SETUP_HOST_ATTRIBUTE_RD(port_type); 2233 SETUP_HOST_ATTRIBUTE_RD(port_state); 2234 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2235 SETUP_HOST_ATTRIBUTE_RD(speed); 2236 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2237 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2238 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2239 2240 /* Transport-managed attributes */ 2241 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2242 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2243 if (ft->issue_fc_host_lip) 2244 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2245 if (ft->vport_create) 2246 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2247 if (ft->vport_delete) 2248 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2249 2250 BUG_ON(count > FC_HOST_NUM_ATTRS); 2251 2252 i->host_attrs[count] = NULL; 2253 2254 /* 2255 * Setup Remote Port Attributes. 2256 */ 2257 count=0; 2258 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2259 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2260 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2261 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2262 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2263 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2264 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2265 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2266 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2267 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2268 2269 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2270 2271 i->rport_attrs[count] = NULL; 2272 2273 /* 2274 * Setup Virtual Port Attributes. 2275 */ 2276 count=0; 2277 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2278 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2279 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2280 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2281 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2282 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2283 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2284 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2285 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2286 2287 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2288 2289 i->vport_attrs[count] = NULL; 2290 2291 return &i->t; 2292} 2293EXPORT_SYMBOL(fc_attach_transport); 2294 2295void fc_release_transport(struct scsi_transport_template *t) 2296{ 2297 struct fc_internal *i = to_fc_internal(t); 2298 2299 transport_container_unregister(&i->t.target_attrs); 2300 transport_container_unregister(&i->t.host_attrs); 2301 transport_container_unregister(&i->rport_attr_cont); 2302 transport_container_unregister(&i->vport_attr_cont); 2303 2304 kfree(i); 2305} 2306EXPORT_SYMBOL(fc_release_transport); 2307 2308/** 2309 * fc_queue_work - Queue work to the fc_host workqueue. 2310 * @shost: Pointer to Scsi_Host bound to fc_host. 2311 * @work: Work to queue for execution. 2312 * 2313 * Return value: 2314 * 1 - work queued for execution 2315 * 0 - work is already queued 2316 * -EINVAL - work queue doesn't exist 2317 */ 2318static int 2319fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2320{ 2321 if (unlikely(!fc_host_work_q(shost))) { 2322 printk(KERN_ERR 2323 "ERROR: FC host '%s' attempted to queue work, " 2324 "when no workqueue created.\n", shost->hostt->name); 2325 dump_stack(); 2326 2327 return -EINVAL; 2328 } 2329 2330 return queue_work(fc_host_work_q(shost), work); 2331} 2332 2333/** 2334 * fc_flush_work - Flush a fc_host's workqueue. 2335 * @shost: Pointer to Scsi_Host bound to fc_host. 2336 */ 2337static void 2338fc_flush_work(struct Scsi_Host *shost) 2339{ 2340 if (!fc_host_work_q(shost)) { 2341 printk(KERN_ERR 2342 "ERROR: FC host '%s' attempted to flush work, " 2343 "when no workqueue created.\n", shost->hostt->name); 2344 dump_stack(); 2345 return; 2346 } 2347 2348 flush_workqueue(fc_host_work_q(shost)); 2349} 2350 2351/** 2352 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2353 * @shost: Pointer to Scsi_Host bound to fc_host. 2354 * @work: Work to queue for execution. 2355 * @delay: jiffies to delay the work queuing 2356 * 2357 * Return value: 2358 * 1 on success / 0 already queued / < 0 for error 2359 */ 2360static int 2361fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2362 unsigned long delay) 2363{ 2364 if (unlikely(!fc_host_devloss_work_q(shost))) { 2365 printk(KERN_ERR 2366 "ERROR: FC host '%s' attempted to queue work, " 2367 "when no workqueue created.\n", shost->hostt->name); 2368 dump_stack(); 2369 2370 return -EINVAL; 2371 } 2372 2373 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2374} 2375 2376/** 2377 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2378 * @shost: Pointer to Scsi_Host bound to fc_host. 2379 */ 2380static void 2381fc_flush_devloss(struct Scsi_Host *shost) 2382{ 2383 if (!fc_host_devloss_work_q(shost)) { 2384 printk(KERN_ERR 2385 "ERROR: FC host '%s' attempted to flush work, " 2386 "when no workqueue created.\n", shost->hostt->name); 2387 dump_stack(); 2388 return; 2389 } 2390 2391 flush_workqueue(fc_host_devloss_work_q(shost)); 2392} 2393 2394 2395/** 2396 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2397 * @shost: Which &Scsi_Host 2398 * 2399 * This routine is expected to be called immediately preceding the 2400 * a driver's call to scsi_remove_host(). 2401 * 2402 * WARNING: A driver utilizing the fc_transport, which fails to call 2403 * this routine prior to scsi_remove_host(), will leave dangling 2404 * objects in /sys/class/fc_remote_ports. Access to any of these 2405 * objects can result in a system crash !!! 2406 * 2407 * Notes: 2408 * This routine assumes no locks are held on entry. 2409 */ 2410void 2411fc_remove_host(struct Scsi_Host *shost) 2412{ 2413 struct fc_vport *vport = NULL, *next_vport = NULL; 2414 struct fc_rport *rport = NULL, *next_rport = NULL; 2415 struct workqueue_struct *work_q; 2416 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2417 unsigned long flags; 2418 2419 spin_lock_irqsave(shost->host_lock, flags); 2420 2421 /* Remove any vports */ 2422 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2423 vport->flags |= FC_VPORT_DELETING; 2424 fc_queue_work(shost, &vport->vport_delete_work); 2425 } 2426 2427 /* Remove any remote ports */ 2428 list_for_each_entry_safe(rport, next_rport, 2429 &fc_host->rports, peers) { 2430 list_del(&rport->peers); 2431 rport->port_state = FC_PORTSTATE_DELETED; 2432 fc_queue_work(shost, &rport->rport_delete_work); 2433 } 2434 2435 list_for_each_entry_safe(rport, next_rport, 2436 &fc_host->rport_bindings, peers) { 2437 list_del(&rport->peers); 2438 rport->port_state = FC_PORTSTATE_DELETED; 2439 fc_queue_work(shost, &rport->rport_delete_work); 2440 } 2441 2442 spin_unlock_irqrestore(shost->host_lock, flags); 2443 2444 /* flush all scan work items */ 2445 scsi_flush_work(shost); 2446 2447 /* flush all stgt delete, and rport delete work items, then kill it */ 2448 if (fc_host->work_q) { 2449 work_q = fc_host->work_q; 2450 fc_host->work_q = NULL; 2451 destroy_workqueue(work_q); 2452 } 2453 2454 /* flush all devloss work items, then kill it */ 2455 if (fc_host->devloss_work_q) { 2456 work_q = fc_host->devloss_work_q; 2457 fc_host->devloss_work_q = NULL; 2458 destroy_workqueue(work_q); 2459 } 2460} 2461EXPORT_SYMBOL(fc_remove_host); 2462 2463static void fc_terminate_rport_io(struct fc_rport *rport) 2464{ 2465 struct Scsi_Host *shost = rport_to_shost(rport); 2466 struct fc_internal *i = to_fc_internal(shost->transportt); 2467 2468 /* Involve the LLDD if possible to terminate all io on the rport. */ 2469 if (i->f->terminate_rport_io) 2470 i->f->terminate_rport_io(rport); 2471 2472 /* 2473 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2474 */ 2475 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2476} 2477 2478/** 2479 * fc_starget_delete - called to delete the scsi descendants of an rport 2480 * @work: remote port to be operated on. 2481 * 2482 * Deletes target and all sdevs. 2483 */ 2484static void 2485fc_starget_delete(struct work_struct *work) 2486{ 2487 struct fc_rport *rport = 2488 container_of(work, struct fc_rport, stgt_delete_work); 2489 2490 fc_terminate_rport_io(rport); 2491 scsi_remove_target(&rport->dev); 2492} 2493 2494 2495/** 2496 * fc_rport_final_delete - finish rport termination and delete it. 2497 * @work: remote port to be deleted. 2498 */ 2499static void 2500fc_rport_final_delete(struct work_struct *work) 2501{ 2502 struct fc_rport *rport = 2503 container_of(work, struct fc_rport, rport_delete_work); 2504 struct device *dev = &rport->dev; 2505 struct Scsi_Host *shost = rport_to_shost(rport); 2506 struct fc_internal *i = to_fc_internal(shost->transportt); 2507 unsigned long flags; 2508 int do_callback = 0; 2509 2510 fc_terminate_rport_io(rport); 2511 2512 /* 2513 * if a scan is pending, flush the SCSI Host work_q so that 2514 * that we can reclaim the rport scan work element. 2515 */ 2516 if (rport->flags & FC_RPORT_SCAN_PENDING) 2517 scsi_flush_work(shost); 2518 2519 /* 2520 * Cancel any outstanding timers. These should really exist 2521 * only when rmmod'ing the LLDD and we're asking for 2522 * immediate termination of the rports 2523 */ 2524 spin_lock_irqsave(shost->host_lock, flags); 2525 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2526 spin_unlock_irqrestore(shost->host_lock, flags); 2527 if (!cancel_delayed_work(&rport->fail_io_work)) 2528 fc_flush_devloss(shost); 2529 if (!cancel_delayed_work(&rport->dev_loss_work)) 2530 fc_flush_devloss(shost); 2531 cancel_work_sync(&rport->scan_work); 2532 spin_lock_irqsave(shost->host_lock, flags); 2533 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2534 } 2535 spin_unlock_irqrestore(shost->host_lock, flags); 2536 2537 /* Delete SCSI target and sdevs */ 2538 if (rport->scsi_target_id != -1) 2539 fc_starget_delete(&rport->stgt_delete_work); 2540 2541 /* 2542 * Notify the driver that the rport is now dead. The LLDD will 2543 * also guarantee that any communication to the rport is terminated 2544 * 2545 * Avoid this call if we already called it when we preserved the 2546 * rport for the binding. 2547 */ 2548 spin_lock_irqsave(shost->host_lock, flags); 2549 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2550 (i->f->dev_loss_tmo_callbk)) { 2551 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2552 do_callback = 1; 2553 } 2554 spin_unlock_irqrestore(shost->host_lock, flags); 2555 2556 if (do_callback) 2557 i->f->dev_loss_tmo_callbk(rport); 2558 2559 fc_bsg_remove(rport->rqst_q); 2560 2561 transport_remove_device(dev); 2562 device_del(dev); 2563 transport_destroy_device(dev); 2564 scsi_host_put(shost); /* for fc_host->rport list */ 2565 put_device(dev); /* for self-reference */ 2566} 2567 2568 2569/** 2570 * fc_remote_port_create - allocates and creates a remote FC port. 2571 * @shost: scsi host the remote port is connected to. 2572 * @channel: Channel on shost port connected to. 2573 * @ids: The world wide names, fc address, and FC4 port 2574 * roles for the remote port. 2575 * 2576 * Allocates and creates the remoter port structure, including the 2577 * class and sysfs creation. 2578 * 2579 * Notes: 2580 * This routine assumes no locks are held on entry. 2581 */ 2582static struct fc_rport * 2583fc_remote_port_create(struct Scsi_Host *shost, int channel, 2584 struct fc_rport_identifiers *ids) 2585{ 2586 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2587 struct fc_internal *fci = to_fc_internal(shost->transportt); 2588 struct fc_rport *rport; 2589 struct device *dev; 2590 unsigned long flags; 2591 int error; 2592 size_t size; 2593 2594 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2595 rport = kzalloc(size, GFP_KERNEL); 2596 if (unlikely(!rport)) { 2597 printk(KERN_ERR "%s: allocation failure\n", __func__); 2598 return NULL; 2599 } 2600 2601 rport->maxframe_size = -1; 2602 rport->supported_classes = FC_COS_UNSPECIFIED; 2603 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2604 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2605 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2606 rport->port_id = ids->port_id; 2607 rport->roles = ids->roles; 2608 rport->port_state = FC_PORTSTATE_ONLINE; 2609 if (fci->f->dd_fcrport_size) 2610 rport->dd_data = &rport[1]; 2611 rport->channel = channel; 2612 rport->fast_io_fail_tmo = -1; 2613 2614 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2615 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2616 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2617 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2618 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2619 2620 spin_lock_irqsave(shost->host_lock, flags); 2621 2622 rport->number = fc_host->next_rport_number++; 2623 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) || 2624 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) 2625 rport->scsi_target_id = fc_host->next_target_id++; 2626 else 2627 rport->scsi_target_id = -1; 2628 list_add_tail(&rport->peers, &fc_host->rports); 2629 scsi_host_get(shost); /* for fc_host->rport list */ 2630 2631 spin_unlock_irqrestore(shost->host_lock, flags); 2632 2633 dev = &rport->dev; 2634 device_initialize(dev); /* takes self reference */ 2635 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2636 dev->release = fc_rport_dev_release; 2637 dev_set_name(dev, "rport-%d:%d-%d", 2638 shost->host_no, channel, rport->number); 2639 transport_setup_device(dev); 2640 2641 error = device_add(dev); 2642 if (error) { 2643 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2644 goto delete_rport; 2645 } 2646 transport_add_device(dev); 2647 transport_configure_device(dev); 2648 2649 fc_bsg_rportadd(shost, rport); 2650 /* ignore any bsg add error - we just can't do sgio */ 2651 2652 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2653 /* initiate a scan of the target */ 2654 rport->flags |= FC_RPORT_SCAN_PENDING; 2655 scsi_queue_work(shost, &rport->scan_work); 2656 } 2657 2658 return rport; 2659 2660delete_rport: 2661 transport_destroy_device(dev); 2662 spin_lock_irqsave(shost->host_lock, flags); 2663 list_del(&rport->peers); 2664 scsi_host_put(shost); /* for fc_host->rport list */ 2665 spin_unlock_irqrestore(shost->host_lock, flags); 2666 put_device(dev->parent); 2667 kfree(rport); 2668 return NULL; 2669} 2670 2671/** 2672 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2673 * @shost: scsi host the remote port is connected to. 2674 * @channel: Channel on shost port connected to. 2675 * @ids: The world wide names, fc address, and FC4 port 2676 * roles for the remote port. 2677 * 2678 * The LLDD calls this routine to notify the transport of the existence 2679 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2680 * of the port, it's FC address (port_id), and the FC4 roles that are 2681 * active for the port. 2682 * 2683 * For ports that are FCP targets (aka scsi targets), the FC transport 2684 * maintains consistent target id bindings on behalf of the LLDD. 2685 * A consistent target id binding is an assignment of a target id to 2686 * a remote port identifier, which persists while the scsi host is 2687 * attached. The remote port can disappear, then later reappear, and 2688 * it's target id assignment remains the same. This allows for shifts 2689 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2690 * changes to the scsi subsystem which is based on scsi host number and 2691 * target id values. Bindings are only valid during the attachment of 2692 * the scsi host. If the host detaches, then later re-attaches, target 2693 * id bindings may change. 2694 * 2695 * This routine is responsible for returning a remote port structure. 2696 * The routine will search the list of remote ports it maintains 2697 * internally on behalf of consistent target id mappings. If found, the 2698 * remote port structure will be reused. Otherwise, a new remote port 2699 * structure will be allocated. 2700 * 2701 * Whenever a remote port is allocated, a new fc_remote_port class 2702 * device is created. 2703 * 2704 * Should not be called from interrupt context. 2705 * 2706 * Notes: 2707 * This routine assumes no locks are held on entry. 2708 */ 2709struct fc_rport * 2710fc_remote_port_add(struct Scsi_Host *shost, int channel, 2711 struct fc_rport_identifiers *ids) 2712{ 2713 struct fc_internal *fci = to_fc_internal(shost->transportt); 2714 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2715 struct fc_rport *rport; 2716 unsigned long flags; 2717 int match = 0; 2718 2719 /* ensure any stgt delete functions are done */ 2720 fc_flush_work(shost); 2721 2722 /* 2723 * Search the list of "active" rports, for an rport that has been 2724 * deleted, but we've held off the real delete while the target 2725 * is in a "blocked" state. 2726 */ 2727 spin_lock_irqsave(shost->host_lock, flags); 2728 2729 list_for_each_entry(rport, &fc_host->rports, peers) { 2730 2731 if ((rport->port_state == FC_PORTSTATE_BLOCKED || 2732 rport->port_state == FC_PORTSTATE_NOTPRESENT) && 2733 (rport->channel == channel)) { 2734 2735 switch (fc_host->tgtid_bind_type) { 2736 case FC_TGTID_BIND_BY_WWPN: 2737 case FC_TGTID_BIND_NONE: 2738 if (rport->port_name == ids->port_name) 2739 match = 1; 2740 break; 2741 case FC_TGTID_BIND_BY_WWNN: 2742 if (rport->node_name == ids->node_name) 2743 match = 1; 2744 break; 2745 case FC_TGTID_BIND_BY_ID: 2746 if (rport->port_id == ids->port_id) 2747 match = 1; 2748 break; 2749 } 2750 2751 if (match) { 2752 2753 memcpy(&rport->node_name, &ids->node_name, 2754 sizeof(rport->node_name)); 2755 memcpy(&rport->port_name, &ids->port_name, 2756 sizeof(rport->port_name)); 2757 rport->port_id = ids->port_id; 2758 2759 rport->port_state = FC_PORTSTATE_ONLINE; 2760 rport->roles = ids->roles; 2761 2762 spin_unlock_irqrestore(shost->host_lock, flags); 2763 2764 if (fci->f->dd_fcrport_size) 2765 memset(rport->dd_data, 0, 2766 fci->f->dd_fcrport_size); 2767 2768 /* 2769 * If we were not a target, cancel the 2770 * io terminate and rport timers, and 2771 * we're done. 2772 * 2773 * If we were a target, but our new role 2774 * doesn't indicate a target, leave the 2775 * timers running expecting the role to 2776 * change as the target fully logs in. If 2777 * it doesn't, the target will be torn down. 2778 * 2779 * If we were a target, and our role shows 2780 * we're still a target, cancel the timers 2781 * and kick off a scan. 2782 */ 2783 2784 /* was a target, not in roles */ 2785 if ((rport->scsi_target_id != -1) && 2786 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2787 return rport; 2788 2789 /* 2790 * Stop the fail io and dev_loss timers. 2791 * If they flush, the port_state will 2792 * be checked and will NOOP the function. 2793 */ 2794 if (!cancel_delayed_work(&rport->fail_io_work)) 2795 fc_flush_devloss(shost); 2796 if (!cancel_delayed_work(&rport->dev_loss_work)) 2797 fc_flush_devloss(shost); 2798 2799 spin_lock_irqsave(shost->host_lock, flags); 2800 2801 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2802 FC_RPORT_DEVLOSS_PENDING | 2803 FC_RPORT_DEVLOSS_CALLBK_DONE); 2804 2805 spin_unlock_irqrestore(shost->host_lock, flags); 2806 2807 /* if target, initiate a scan */ 2808 if (rport->scsi_target_id != -1) { 2809 scsi_target_unblock(&rport->dev, 2810 SDEV_RUNNING); 2811 spin_lock_irqsave(shost->host_lock, 2812 flags); 2813 rport->flags |= FC_RPORT_SCAN_PENDING; 2814 scsi_queue_work(shost, 2815 &rport->scan_work); 2816 spin_unlock_irqrestore(shost->host_lock, 2817 flags); 2818 } 2819 2820 fc_bsg_goose_queue(rport); 2821 2822 return rport; 2823 } 2824 } 2825 } 2826 2827 /* 2828 * Search the bindings array 2829 * Note: if never a FCP target, you won't be on this list 2830 */ 2831 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2832 2833 /* search for a matching consistent binding */ 2834 2835 list_for_each_entry(rport, &fc_host->rport_bindings, 2836 peers) { 2837 if (rport->channel != channel) 2838 continue; 2839 2840 switch (fc_host->tgtid_bind_type) { 2841 case FC_TGTID_BIND_BY_WWPN: 2842 if (rport->port_name == ids->port_name) 2843 match = 1; 2844 break; 2845 case FC_TGTID_BIND_BY_WWNN: 2846 if (rport->node_name == ids->node_name) 2847 match = 1; 2848 break; 2849 case FC_TGTID_BIND_BY_ID: 2850 if (rport->port_id == ids->port_id) 2851 match = 1; 2852 break; 2853 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2854 break; 2855 } 2856 2857 if (match) { 2858 list_move_tail(&rport->peers, &fc_host->rports); 2859 break; 2860 } 2861 } 2862 2863 if (match) { 2864 memcpy(&rport->node_name, &ids->node_name, 2865 sizeof(rport->node_name)); 2866 memcpy(&rport->port_name, &ids->port_name, 2867 sizeof(rport->port_name)); 2868 rport->port_id = ids->port_id; 2869 rport->port_state = FC_PORTSTATE_ONLINE; 2870 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2871 2872 if (fci->f->dd_fcrport_size) 2873 memset(rport->dd_data, 0, 2874 fci->f->dd_fcrport_size); 2875 spin_unlock_irqrestore(shost->host_lock, flags); 2876 2877 fc_remote_port_rolechg(rport, ids->roles); 2878 return rport; 2879 } 2880 } 2881 2882 spin_unlock_irqrestore(shost->host_lock, flags); 2883 2884 /* No consistent binding found - create new remote port entry */ 2885 rport = fc_remote_port_create(shost, channel, ids); 2886 2887 return rport; 2888} 2889EXPORT_SYMBOL(fc_remote_port_add); 2890 2891 2892/** 2893 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2894 * @rport: The remote port that no longer exists 2895 * 2896 * The LLDD calls this routine to notify the transport that a remote 2897 * port is no longer part of the topology. Note: Although a port 2898 * may no longer be part of the topology, it may persist in the remote 2899 * ports displayed by the fc_host. We do this under 2 conditions: 2900 * 2901 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2902 * This allows the port to temporarily disappear, then reappear without 2903 * disrupting the SCSI device tree attached to it. During the "blocked" 2904 * period the port will still exist. 2905 * 2906 * 2) If the port was a scsi target and disappears for longer than we 2907 * expect, we'll delete the port and the tear down the SCSI device tree 2908 * attached to it. However, we want to semi-persist the target id assigned 2909 * to that port if it eventually does exist. The port structure will 2910 * remain (although with minimal information) so that the target id 2911 * bindings also remain. 2912 * 2913 * If the remote port is not an FCP Target, it will be fully torn down 2914 * and deallocated, including the fc_remote_port class device. 2915 * 2916 * If the remote port is an FCP Target, the port will be placed in a 2917 * temporary blocked state. From the LLDD's perspective, the rport no 2918 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2919 * exists, but all sdevs on it are blocked from further I/O. The following 2920 * is then expected. 2921 * 2922 * If the remote port does not return (signaled by a LLDD call to 2923 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2924 * scsi target is removed - killing all outstanding i/o and removing the 2925 * scsi devices attached to it. The port structure will be marked Not 2926 * Present and be partially cleared, leaving only enough information to 2927 * recognize the remote port relative to the scsi target id binding if 2928 * it later appears. The port will remain as long as there is a valid 2929 * binding (e.g. until the user changes the binding type or unloads the 2930 * scsi host with the binding). 2931 * 2932 * If the remote port returns within the dev_loss_tmo value (and matches 2933 * according to the target id binding type), the port structure will be 2934 * reused. If it is no longer a SCSI target, the target will be torn 2935 * down. If it continues to be a SCSI target, then the target will be 2936 * unblocked (allowing i/o to be resumed), and a scan will be activated 2937 * to ensure that all luns are detected. 2938 * 2939 * Called from normal process context only - cannot be called from interrupt. 2940 * 2941 * Notes: 2942 * This routine assumes no locks are held on entry. 2943 */ 2944void 2945fc_remote_port_delete(struct fc_rport *rport) 2946{ 2947 struct Scsi_Host *shost = rport_to_shost(rport); 2948 unsigned long timeout = rport->dev_loss_tmo; 2949 unsigned long flags; 2950 2951 /* 2952 * No need to flush the fc_host work_q's, as all adds are synchronous. 2953 * 2954 * We do need to reclaim the rport scan work element, so eventually 2955 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2956 * there's still a scan pending. 2957 */ 2958 2959 spin_lock_irqsave(shost->host_lock, flags); 2960 2961 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2962 spin_unlock_irqrestore(shost->host_lock, flags); 2963 return; 2964 } 2965 2966 /* 2967 * In the past, we if this was not an FCP-Target, we would 2968 * unconditionally just jump to deleting the rport. 2969 * However, rports can be used as node containers by the LLDD, 2970 * and its not appropriate to just terminate the rport at the 2971 * first sign of a loss in connectivity. The LLDD may want to 2972 * send ELS traffic to re-validate the login. If the rport is 2973 * immediately deleted, it makes it inappropriate for a node 2974 * container. 2975 * So... we now unconditionally wait dev_loss_tmo before 2976 * destroying an rport. 2977 */ 2978 2979 rport->port_state = FC_PORTSTATE_BLOCKED; 2980 2981 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 2982 2983 spin_unlock_irqrestore(shost->host_lock, flags); 2984 2985 scsi_target_block(&rport->dev); 2986 2987 /* see if we need to kill io faster than waiting for device loss */ 2988 if ((rport->fast_io_fail_tmo != -1) && 2989 (rport->fast_io_fail_tmo < timeout)) 2990 fc_queue_devloss_work(shost, &rport->fail_io_work, 2991 rport->fast_io_fail_tmo * HZ); 2992 2993 /* cap the length the devices can be blocked until they are deleted */ 2994 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 2995} 2996EXPORT_SYMBOL(fc_remote_port_delete); 2997 2998/** 2999 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3000 * @rport: The remote port that changed. 3001 * @roles: New roles for this port. 3002 * 3003 * Description: The LLDD calls this routine to notify the transport that the 3004 * roles on a remote port may have changed. The largest effect of this is 3005 * if a port now becomes a FCP Target, it must be allocated a 3006 * scsi target id. If the port is no longer a FCP target, any 3007 * scsi target id value assigned to it will persist in case the 3008 * role changes back to include FCP Target. No changes in the scsi 3009 * midlayer will be invoked if the role changes (in the expectation 3010 * that the role will be resumed. If it doesn't normal error processing 3011 * will take place). 3012 * 3013 * Should not be called from interrupt context. 3014 * 3015 * Notes: 3016 * This routine assumes no locks are held on entry. 3017 */ 3018void 3019fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3020{ 3021 struct Scsi_Host *shost = rport_to_shost(rport); 3022 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3023 unsigned long flags; 3024 int create = 0; 3025 3026 spin_lock_irqsave(shost->host_lock, flags); 3027 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3028 if (rport->scsi_target_id == -1) { 3029 rport->scsi_target_id = fc_host->next_target_id++; 3030 create = 1; 3031 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3032 create = 1; 3033 } 3034 3035 rport->roles = roles; 3036 3037 spin_unlock_irqrestore(shost->host_lock, flags); 3038 3039 if (create) { 3040 /* 3041 * There may have been a delete timer running on the 3042 * port. Ensure that it is cancelled as we now know 3043 * the port is an FCP Target. 3044 * Note: we know the rport exists and is in an online 3045 * state as the LLDD would not have had an rport 3046 * reference to pass us. 3047 * 3048 * Take no action on the del_timer failure as the state 3049 * machine state change will validate the 3050 * transaction. 3051 */ 3052 if (!cancel_delayed_work(&rport->fail_io_work)) 3053 fc_flush_devloss(shost); 3054 if (!cancel_delayed_work(&rport->dev_loss_work)) 3055 fc_flush_devloss(shost); 3056 3057 spin_lock_irqsave(shost->host_lock, flags); 3058 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3059 FC_RPORT_DEVLOSS_PENDING | 3060 FC_RPORT_DEVLOSS_CALLBK_DONE); 3061 spin_unlock_irqrestore(shost->host_lock, flags); 3062 3063 /* ensure any stgt delete functions are done */ 3064 fc_flush_work(shost); 3065 3066 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3067 /* initiate a scan of the target */ 3068 spin_lock_irqsave(shost->host_lock, flags); 3069 rport->flags |= FC_RPORT_SCAN_PENDING; 3070 scsi_queue_work(shost, &rport->scan_work); 3071 spin_unlock_irqrestore(shost->host_lock, flags); 3072 } 3073} 3074EXPORT_SYMBOL(fc_remote_port_rolechg); 3075 3076/** 3077 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3078 * @work: rport target that failed to reappear in the allotted time. 3079 * 3080 * Description: An attempt to delete a remote port blocks, and if it fails 3081 * to return in the allotted time this gets called. 3082 */ 3083static void 3084fc_timeout_deleted_rport(struct work_struct *work) 3085{ 3086 struct fc_rport *rport = 3087 container_of(work, struct fc_rport, dev_loss_work.work); 3088 struct Scsi_Host *shost = rport_to_shost(rport); 3089 struct fc_internal *i = to_fc_internal(shost->transportt); 3090 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3091 unsigned long flags; 3092 int do_callback = 0; 3093 3094 spin_lock_irqsave(shost->host_lock, flags); 3095 3096 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3097 3098 /* 3099 * If the port is ONLINE, then it came back. If it was a SCSI 3100 * target, validate it still is. If not, tear down the 3101 * scsi_target on it. 3102 */ 3103 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3104 (rport->scsi_target_id != -1) && 3105 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3106 dev_printk(KERN_ERR, &rport->dev, 3107 "blocked FC remote port time out: no longer" 3108 " a FCP target, removing starget\n"); 3109 spin_unlock_irqrestore(shost->host_lock, flags); 3110 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3111 fc_queue_work(shost, &rport->stgt_delete_work); 3112 return; 3113 } 3114 3115 /* NOOP state - we're flushing workq's */ 3116 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3117 spin_unlock_irqrestore(shost->host_lock, flags); 3118 dev_printk(KERN_ERR, &rport->dev, 3119 "blocked FC remote port time out: leaving" 3120 " rport%s alone\n", 3121 (rport->scsi_target_id != -1) ? " and starget" : ""); 3122 return; 3123 } 3124 3125 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3126 (rport->scsi_target_id == -1)) { 3127 list_del(&rport->peers); 3128 rport->port_state = FC_PORTSTATE_DELETED; 3129 dev_printk(KERN_ERR, &rport->dev, 3130 "blocked FC remote port time out: removing" 3131 " rport%s\n", 3132 (rport->scsi_target_id != -1) ? " and starget" : ""); 3133 fc_queue_work(shost, &rport->rport_delete_work); 3134 spin_unlock_irqrestore(shost->host_lock, flags); 3135 return; 3136 } 3137 3138 dev_printk(KERN_ERR, &rport->dev, 3139 "blocked FC remote port time out: removing target and " 3140 "saving binding\n"); 3141 3142 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3143 3144 /* 3145 * Note: We do not remove or clear the hostdata area. This allows 3146 * host-specific target data to persist along with the 3147 * scsi_target_id. It's up to the host to manage it's hostdata area. 3148 */ 3149 3150 /* 3151 * Reinitialize port attributes that may change if the port comes back. 3152 */ 3153 rport->maxframe_size = -1; 3154 rport->supported_classes = FC_COS_UNSPECIFIED; 3155 rport->roles = FC_PORT_ROLE_UNKNOWN; 3156 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3157 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3158 3159 /* 3160 * Pre-emptively kill I/O rather than waiting for the work queue 3161 * item to teardown the starget. (FCOE libFC folks prefer this 3162 * and to have the rport_port_id still set when it's done). 3163 */ 3164 spin_unlock_irqrestore(shost->host_lock, flags); 3165 fc_terminate_rport_io(rport); 3166 3167 spin_lock_irqsave(shost->host_lock, flags); 3168 3169 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3170 3171 /* remove the identifiers that aren't used in the consisting binding */ 3172 switch (fc_host->tgtid_bind_type) { 3173 case FC_TGTID_BIND_BY_WWPN: 3174 rport->node_name = -1; 3175 rport->port_id = -1; 3176 break; 3177 case FC_TGTID_BIND_BY_WWNN: 3178 rport->port_name = -1; 3179 rport->port_id = -1; 3180 break; 3181 case FC_TGTID_BIND_BY_ID: 3182 rport->node_name = -1; 3183 rport->port_name = -1; 3184 break; 3185 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3186 break; 3187 } 3188 3189 /* 3190 * As this only occurs if the remote port (scsi target) 3191 * went away and didn't come back - we'll remove 3192 * all attached scsi devices. 3193 */ 3194 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3195 fc_queue_work(shost, &rport->stgt_delete_work); 3196 3197 do_callback = 1; 3198 } 3199 3200 spin_unlock_irqrestore(shost->host_lock, flags); 3201 3202 /* 3203 * Notify the driver that the rport is now dead. The LLDD will 3204 * also guarantee that any communication to the rport is terminated 3205 * 3206 * Note: we set the CALLBK_DONE flag above to correspond 3207 */ 3208 if (do_callback && i->f->dev_loss_tmo_callbk) 3209 i->f->dev_loss_tmo_callbk(rport); 3210} 3211 3212 3213/** 3214 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3215 * @work: rport to terminate io on. 3216 * 3217 * Notes: Only requests the failure of the io, not that all are flushed 3218 * prior to returning. 3219 */ 3220static void 3221fc_timeout_fail_rport_io(struct work_struct *work) 3222{ 3223 struct fc_rport *rport = 3224 container_of(work, struct fc_rport, fail_io_work.work); 3225 3226 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3227 return; 3228 3229 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3230 fc_terminate_rport_io(rport); 3231} 3232 3233/** 3234 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3235 * @work: remote port to be scanned. 3236 */ 3237static void 3238fc_scsi_scan_rport(struct work_struct *work) 3239{ 3240 struct fc_rport *rport = 3241 container_of(work, struct fc_rport, scan_work); 3242 struct Scsi_Host *shost = rport_to_shost(rport); 3243 struct fc_internal *i = to_fc_internal(shost->transportt); 3244 unsigned long flags; 3245 3246 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3247 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3248 !(i->f->disable_target_scan)) { 3249 scsi_scan_target(&rport->dev, rport->channel, 3250 rport->scsi_target_id, SCAN_WILD_CARD, 3251 SCSI_SCAN_RESCAN); 3252 } 3253 3254 spin_lock_irqsave(shost->host_lock, flags); 3255 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3256 spin_unlock_irqrestore(shost->host_lock, flags); 3257} 3258 3259/** 3260 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport. 3261 * @rport: Remote port that scsi_eh is trying to recover. 3262 * 3263 * This routine can be called from a FC LLD scsi_eh callback. It 3264 * blocks the scsi_eh thread until the fc_rport leaves the 3265 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3266 * necessary to avoid the scsi_eh failing recovery actions for blocked 3267 * rports which would lead to offlined SCSI devices. 3268 * 3269 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3270 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3271 * passed back to scsi_eh. 3272 */ 3273int fc_block_rport(struct fc_rport *rport) 3274{ 3275 struct Scsi_Host *shost = rport_to_shost(rport); 3276 unsigned long flags; 3277 3278 spin_lock_irqsave(shost->host_lock, flags); 3279 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3280 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3281 spin_unlock_irqrestore(shost->host_lock, flags); 3282 msleep(1000); 3283 spin_lock_irqsave(shost->host_lock, flags); 3284 } 3285 spin_unlock_irqrestore(shost->host_lock, flags); 3286 3287 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3288 return FAST_IO_FAIL; 3289 3290 return 0; 3291} 3292EXPORT_SYMBOL(fc_block_rport); 3293 3294/** 3295 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3296 * @cmnd: SCSI command that scsi_eh is trying to recover 3297 * 3298 * This routine can be called from a FC LLD scsi_eh callback. It 3299 * blocks the scsi_eh thread until the fc_rport leaves the 3300 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3301 * necessary to avoid the scsi_eh failing recovery actions for blocked 3302 * rports which would lead to offlined SCSI devices. 3303 * 3304 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3305 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3306 * passed back to scsi_eh. 3307 */ 3308int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3309{ 3310 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3311 3312 if (WARN_ON_ONCE(!rport)) 3313 return FAST_IO_FAIL; 3314 3315 return fc_block_rport(rport); 3316} 3317EXPORT_SYMBOL(fc_block_scsi_eh); 3318 3319/** 3320 * fc_vport_setup - allocates and creates a FC virtual port. 3321 * @shost: scsi host the virtual port is connected to. 3322 * @channel: Channel on shost port connected to. 3323 * @pdev: parent device for vport 3324 * @ids: The world wide names, FC4 port roles, etc for 3325 * the virtual port. 3326 * @ret_vport: The pointer to the created vport. 3327 * 3328 * Allocates and creates the vport structure, calls the parent host 3329 * to instantiate the vport, this completes w/ class and sysfs creation. 3330 * 3331 * Notes: 3332 * This routine assumes no locks are held on entry. 3333 */ 3334static int 3335fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3336 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3337{ 3338 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3339 struct fc_internal *fci = to_fc_internal(shost->transportt); 3340 struct fc_vport *vport; 3341 struct device *dev; 3342 unsigned long flags; 3343 size_t size; 3344 int error; 3345 3346 *ret_vport = NULL; 3347 3348 if ( ! fci->f->vport_create) 3349 return -ENOENT; 3350 3351 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3352 vport = kzalloc(size, GFP_KERNEL); 3353 if (unlikely(!vport)) { 3354 printk(KERN_ERR "%s: allocation failure\n", __func__); 3355 return -ENOMEM; 3356 } 3357 3358 vport->vport_state = FC_VPORT_UNKNOWN; 3359 vport->vport_last_state = FC_VPORT_UNKNOWN; 3360 vport->node_name = ids->node_name; 3361 vport->port_name = ids->port_name; 3362 vport->roles = ids->roles; 3363 vport->vport_type = ids->vport_type; 3364 if (fci->f->dd_fcvport_size) 3365 vport->dd_data = &vport[1]; 3366 vport->shost = shost; 3367 vport->channel = channel; 3368 vport->flags = FC_VPORT_CREATING; 3369 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3370 3371 spin_lock_irqsave(shost->host_lock, flags); 3372 3373 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3374 spin_unlock_irqrestore(shost->host_lock, flags); 3375 kfree(vport); 3376 return -ENOSPC; 3377 } 3378 fc_host->npiv_vports_inuse++; 3379 vport->number = fc_host->next_vport_number++; 3380 list_add_tail(&vport->peers, &fc_host->vports); 3381 scsi_host_get(shost); /* for fc_host->vport list */ 3382 3383 spin_unlock_irqrestore(shost->host_lock, flags); 3384 3385 dev = &vport->dev; 3386 device_initialize(dev); /* takes self reference */ 3387 dev->parent = get_device(pdev); /* takes parent reference */ 3388 dev->release = fc_vport_dev_release; 3389 dev_set_name(dev, "vport-%d:%d-%d", 3390 shost->host_no, channel, vport->number); 3391 transport_setup_device(dev); 3392 3393 error = device_add(dev); 3394 if (error) { 3395 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3396 goto delete_vport; 3397 } 3398 transport_add_device(dev); 3399 transport_configure_device(dev); 3400 3401 error = fci->f->vport_create(vport, ids->disable); 3402 if (error) { 3403 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3404 goto delete_vport_all; 3405 } 3406 3407 /* 3408 * if the parent isn't the physical adapter's Scsi_Host, ensure 3409 * the Scsi_Host at least contains a symlink to the vport. 3410 */ 3411 if (pdev != &shost->shost_gendev) { 3412 error = sysfs_create_link(&shost->shost_gendev.kobj, 3413 &dev->kobj, dev_name(dev)); 3414 if (error) 3415 printk(KERN_ERR 3416 "%s: Cannot create vport symlinks for " 3417 "%s, err=%d\n", 3418 __func__, dev_name(dev), error); 3419 } 3420 spin_lock_irqsave(shost->host_lock, flags); 3421 vport->flags &= ~FC_VPORT_CREATING; 3422 spin_unlock_irqrestore(shost->host_lock, flags); 3423 3424 dev_printk(KERN_NOTICE, pdev, 3425 "%s created via shost%d channel %d\n", dev_name(dev), 3426 shost->host_no, channel); 3427 3428 *ret_vport = vport; 3429 3430 return 0; 3431 3432delete_vport_all: 3433 transport_remove_device(dev); 3434 device_del(dev); 3435delete_vport: 3436 transport_destroy_device(dev); 3437 spin_lock_irqsave(shost->host_lock, flags); 3438 list_del(&vport->peers); 3439 scsi_host_put(shost); /* for fc_host->vport list */ 3440 fc_host->npiv_vports_inuse--; 3441 spin_unlock_irqrestore(shost->host_lock, flags); 3442 put_device(dev->parent); 3443 kfree(vport); 3444 3445 return error; 3446} 3447 3448/** 3449 * fc_vport_create - Admin App or LLDD requests creation of a vport 3450 * @shost: scsi host the virtual port is connected to. 3451 * @channel: channel on shost port connected to. 3452 * @ids: The world wide names, FC4 port roles, etc for 3453 * the virtual port. 3454 * 3455 * Notes: 3456 * This routine assumes no locks are held on entry. 3457 */ 3458struct fc_vport * 3459fc_vport_create(struct Scsi_Host *shost, int channel, 3460 struct fc_vport_identifiers *ids) 3461{ 3462 int stat; 3463 struct fc_vport *vport; 3464 3465 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3466 ids, &vport); 3467 return stat ? NULL : vport; 3468} 3469EXPORT_SYMBOL(fc_vport_create); 3470 3471/** 3472 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3473 * @vport: fc_vport to be terminated 3474 * 3475 * Calls the LLDD vport_delete() function, then deallocates and removes 3476 * the vport from the shost and object tree. 3477 * 3478 * Notes: 3479 * This routine assumes no locks are held on entry. 3480 */ 3481int 3482fc_vport_terminate(struct fc_vport *vport) 3483{ 3484 struct Scsi_Host *shost = vport_to_shost(vport); 3485 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3486 struct fc_internal *i = to_fc_internal(shost->transportt); 3487 struct device *dev = &vport->dev; 3488 unsigned long flags; 3489 int stat; 3490 3491 if (i->f->vport_delete) 3492 stat = i->f->vport_delete(vport); 3493 else 3494 stat = -ENOENT; 3495 3496 spin_lock_irqsave(shost->host_lock, flags); 3497 vport->flags &= ~FC_VPORT_DELETING; 3498 if (!stat) { 3499 vport->flags |= FC_VPORT_DELETED; 3500 list_del(&vport->peers); 3501 fc_host->npiv_vports_inuse--; 3502 scsi_host_put(shost); /* for fc_host->vport list */ 3503 } 3504 spin_unlock_irqrestore(shost->host_lock, flags); 3505 3506 if (stat) 3507 return stat; 3508 3509 if (dev->parent != &shost->shost_gendev) 3510 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3511 transport_remove_device(dev); 3512 device_del(dev); 3513 transport_destroy_device(dev); 3514 3515 /* 3516 * Removing our self-reference should mean our 3517 * release function gets called, which will drop the remaining 3518 * parent reference and free the data structure. 3519 */ 3520 put_device(dev); /* for self-reference */ 3521 3522 return 0; /* SUCCESS */ 3523} 3524EXPORT_SYMBOL(fc_vport_terminate); 3525 3526/** 3527 * fc_vport_sched_delete - workq-based delete request for a vport 3528 * @work: vport to be deleted. 3529 */ 3530static void 3531fc_vport_sched_delete(struct work_struct *work) 3532{ 3533 struct fc_vport *vport = 3534 container_of(work, struct fc_vport, vport_delete_work); 3535 int stat; 3536 3537 stat = fc_vport_terminate(vport); 3538 if (stat) 3539 dev_printk(KERN_ERR, vport->dev.parent, 3540 "%s: %s could not be deleted created via " 3541 "shost%d channel %d - error %d\n", __func__, 3542 dev_name(&vport->dev), vport->shost->host_no, 3543 vport->channel, stat); 3544} 3545 3546 3547/* 3548 * BSG support 3549 */ 3550 3551/** 3552 * fc_bsg_job_timeout - handler for when a bsg request timesout 3553 * @req: request that timed out 3554 */ 3555static enum blk_eh_timer_return 3556fc_bsg_job_timeout(struct request *req) 3557{ 3558 struct bsg_job *job = blk_mq_rq_to_pdu(req); 3559 struct Scsi_Host *shost = fc_bsg_to_shost(job); 3560 struct fc_rport *rport = fc_bsg_to_rport(job); 3561 struct fc_internal *i = to_fc_internal(shost->transportt); 3562 int err = 0, inflight = 0; 3563 3564 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) 3565 return BLK_EH_RESET_TIMER; 3566 3567 inflight = bsg_job_get(job); 3568 3569 if (inflight && i->f->bsg_timeout) { 3570 /* call LLDD to abort the i/o as it has timed out */ 3571 err = i->f->bsg_timeout(job); 3572 if (err == -EAGAIN) { 3573 bsg_job_put(job); 3574 return BLK_EH_RESET_TIMER; 3575 } else if (err) 3576 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3577 "abort failed with status %d\n", err); 3578 } 3579 3580 /* the blk_end_sync_io() doesn't check the error */ 3581 if (inflight) 3582 blk_mq_end_request(req, BLK_STS_IOERR); 3583 return BLK_EH_DONE; 3584} 3585 3586/** 3587 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3588 * @shost: scsi host rport attached to 3589 * @job: bsg job to be processed 3590 */ 3591static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 3592{ 3593 struct fc_internal *i = to_fc_internal(shost->transportt); 3594 struct fc_bsg_request *bsg_request = job->request; 3595 struct fc_bsg_reply *bsg_reply = job->reply; 3596 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3597 int ret; 3598 3599 /* check if we really have all the request data needed */ 3600 if (job->request_len < cmdlen) { 3601 ret = -ENOMSG; 3602 goto fail_host_msg; 3603 } 3604 3605 /* Validate the host command */ 3606 switch (bsg_request->msgcode) { 3607 case FC_BSG_HST_ADD_RPORT: 3608 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3609 break; 3610 3611 case FC_BSG_HST_DEL_RPORT: 3612 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3613 break; 3614 3615 case FC_BSG_HST_ELS_NOLOGIN: 3616 cmdlen += sizeof(struct fc_bsg_host_els); 3617 /* there better be a xmt and rcv payloads */ 3618 if ((!job->request_payload.payload_len) || 3619 (!job->reply_payload.payload_len)) { 3620 ret = -EINVAL; 3621 goto fail_host_msg; 3622 } 3623 break; 3624 3625 case FC_BSG_HST_CT: 3626 cmdlen += sizeof(struct fc_bsg_host_ct); 3627 /* there better be xmt and rcv payloads */ 3628 if ((!job->request_payload.payload_len) || 3629 (!job->reply_payload.payload_len)) { 3630 ret = -EINVAL; 3631 goto fail_host_msg; 3632 } 3633 break; 3634 3635 case FC_BSG_HST_VENDOR: 3636 cmdlen += sizeof(struct fc_bsg_host_vendor); 3637 if ((shost->hostt->vendor_id == 0L) || 3638 (bsg_request->rqst_data.h_vendor.vendor_id != 3639 shost->hostt->vendor_id)) { 3640 ret = -ESRCH; 3641 goto fail_host_msg; 3642 } 3643 break; 3644 3645 default: 3646 ret = -EBADR; 3647 goto fail_host_msg; 3648 } 3649 3650 ret = i->f->bsg_request(job); 3651 if (!ret) 3652 return 0; 3653 3654fail_host_msg: 3655 /* return the errno failure code as the only status */ 3656 BUG_ON(job->reply_len < sizeof(uint32_t)); 3657 bsg_reply->reply_payload_rcv_len = 0; 3658 bsg_reply->result = ret; 3659 job->reply_len = sizeof(uint32_t); 3660 bsg_job_done(job, bsg_reply->result, 3661 bsg_reply->reply_payload_rcv_len); 3662 return 0; 3663} 3664 3665 3666/* 3667 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3668 * @rport: rport to be restarted 3669 */ 3670static void 3671fc_bsg_goose_queue(struct fc_rport *rport) 3672{ 3673 struct request_queue *q = rport->rqst_q; 3674 3675 if (q) 3676 blk_mq_run_hw_queues(q, true); 3677} 3678 3679/** 3680 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3681 * @shost: scsi host rport attached to 3682 * @job: bsg job to be processed 3683 */ 3684static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 3685{ 3686 struct fc_internal *i = to_fc_internal(shost->transportt); 3687 struct fc_bsg_request *bsg_request = job->request; 3688 struct fc_bsg_reply *bsg_reply = job->reply; 3689 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3690 int ret; 3691 3692 /* check if we really have all the request data needed */ 3693 if (job->request_len < cmdlen) { 3694 ret = -ENOMSG; 3695 goto fail_rport_msg; 3696 } 3697 3698 /* Validate the rport command */ 3699 switch (bsg_request->msgcode) { 3700 case FC_BSG_RPT_ELS: 3701 cmdlen += sizeof(struct fc_bsg_rport_els); 3702 goto check_bidi; 3703 3704 case FC_BSG_RPT_CT: 3705 cmdlen += sizeof(struct fc_bsg_rport_ct); 3706check_bidi: 3707 /* there better be xmt and rcv payloads */ 3708 if ((!job->request_payload.payload_len) || 3709 (!job->reply_payload.payload_len)) { 3710 ret = -EINVAL; 3711 goto fail_rport_msg; 3712 } 3713 break; 3714 default: 3715 ret = -EBADR; 3716 goto fail_rport_msg; 3717 } 3718 3719 ret = i->f->bsg_request(job); 3720 if (!ret) 3721 return 0; 3722 3723fail_rport_msg: 3724 /* return the errno failure code as the only status */ 3725 BUG_ON(job->reply_len < sizeof(uint32_t)); 3726 bsg_reply->reply_payload_rcv_len = 0; 3727 bsg_reply->result = ret; 3728 job->reply_len = sizeof(uint32_t); 3729 bsg_job_done(job, bsg_reply->result, 3730 bsg_reply->reply_payload_rcv_len); 3731 return 0; 3732} 3733 3734static int fc_bsg_dispatch(struct bsg_job *job) 3735{ 3736 struct Scsi_Host *shost = fc_bsg_to_shost(job); 3737 3738 if (scsi_is_fc_rport(job->dev)) 3739 return fc_bsg_rport_dispatch(shost, job); 3740 else 3741 return fc_bsg_host_dispatch(shost, job); 3742} 3743 3744static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport) 3745{ 3746 if (rport->port_state == FC_PORTSTATE_BLOCKED && 3747 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3748 return BLK_STS_RESOURCE; 3749 3750 if (rport->port_state != FC_PORTSTATE_ONLINE) 3751 return BLK_STS_IOERR; 3752 3753 return BLK_STS_OK; 3754} 3755 3756 3757static int fc_bsg_dispatch_prep(struct bsg_job *job) 3758{ 3759 struct fc_rport *rport = fc_bsg_to_rport(job); 3760 blk_status_t ret; 3761 3762 ret = fc_bsg_rport_prep(rport); 3763 switch (ret) { 3764 case BLK_STS_OK: 3765 break; 3766 case BLK_STS_RESOURCE: 3767 return -EAGAIN; 3768 default: 3769 return -EIO; 3770 } 3771 3772 return fc_bsg_dispatch(job); 3773} 3774 3775/** 3776 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 3777 * @shost: shost for fc_host 3778 * @fc_host: fc_host adding the structures to 3779 */ 3780static int 3781fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 3782{ 3783 struct device *dev = &shost->shost_gendev; 3784 struct fc_internal *i = to_fc_internal(shost->transportt); 3785 struct request_queue *q; 3786 char bsg_name[20]; 3787 3788 fc_host->rqst_q = NULL; 3789 3790 if (!i->f->bsg_request) 3791 return -ENOTSUPP; 3792 3793 snprintf(bsg_name, sizeof(bsg_name), 3794 "fc_host%d", shost->host_no); 3795 3796 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout, 3797 i->f->dd_bsg_size); 3798 if (IS_ERR(q)) { 3799 dev_err(dev, 3800 "fc_host%d: bsg interface failed to initialize - setup queue\n", 3801 shost->host_no); 3802 return PTR_ERR(q); 3803 } 3804 __scsi_init_queue(shost, q); 3805 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 3806 fc_host->rqst_q = q; 3807 return 0; 3808} 3809 3810/** 3811 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 3812 * @shost: shost that rport is attached to 3813 * @rport: rport that the bsg hooks are being attached to 3814 */ 3815static int 3816fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 3817{ 3818 struct device *dev = &rport->dev; 3819 struct fc_internal *i = to_fc_internal(shost->transportt); 3820 struct request_queue *q; 3821 3822 rport->rqst_q = NULL; 3823 3824 if (!i->f->bsg_request) 3825 return -ENOTSUPP; 3826 3827 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep, 3828 fc_bsg_job_timeout, i->f->dd_bsg_size); 3829 if (IS_ERR(q)) { 3830 dev_err(dev, "failed to setup bsg queue\n"); 3831 return PTR_ERR(q); 3832 } 3833 __scsi_init_queue(shost, q); 3834 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 3835 rport->rqst_q = q; 3836 return 0; 3837} 3838 3839 3840/** 3841 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 3842 * @q: the request_queue that is to be torn down. 3843 * 3844 * Notes: 3845 * Before unregistering the queue empty any requests that are blocked 3846 * 3847 * 3848 */ 3849static void 3850fc_bsg_remove(struct request_queue *q) 3851{ 3852 bsg_remove_queue(q); 3853} 3854 3855 3856/* Original Author: Martin Hicks */ 3857MODULE_AUTHOR("James Smart"); 3858MODULE_DESCRIPTION("FC Transport Attributes"); 3859MODULE_LICENSE("GPL"); 3860 3861module_init(fc_transport_init); 3862module_exit(fc_transport_exit); 3863