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