1 /* 2 * FiberChannel transport specific attributes exported to sysfs. 3 * 4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 * ======== 21 * 22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation 23 * Rewrite for host, target, device, and remote port attributes, 24 * statistics, and service functions... 25 * Add vports, etc 26 * 27 */ 28 #include <linux/module.h> 29 #include <linux/init.h> 30 #include <linux/slab.h> 31 #include <linux/delay.h> 32 #include <linux/kernel.h> 33 #include <linux/bsg-lib.h> 34 #include <scsi/scsi_device.h> 35 #include <scsi/scsi_host.h> 36 #include <scsi/scsi_transport.h> 37 #include <scsi/scsi_transport_fc.h> 38 #include <scsi/scsi_cmnd.h> 39 #include <net/netlink.h> 40 #include <scsi/scsi_netlink_fc.h> 41 #include <scsi/scsi_bsg_fc.h> 42 #include "scsi_priv.h" 43 44 static int fc_queue_work(struct Scsi_Host *, struct work_struct *); 45 static void fc_vport_sched_delete(struct work_struct *work); 46 static int fc_vport_setup(struct Scsi_Host *shost, int channel, 47 struct device *pdev, struct fc_vport_identifiers *ids, 48 struct fc_vport **vport); 49 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); 50 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); 51 static void fc_bsg_remove(struct request_queue *); 52 static void fc_bsg_goose_queue(struct fc_rport *); 53 54 /* 55 * Module Parameters 56 */ 57 58 /* 59 * dev_loss_tmo: the default number of seconds that the FC transport 60 * should insulate the loss of a remote port. 61 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 62 */ 63 static unsigned int fc_dev_loss_tmo = 60; /* seconds */ 64 65 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); 66 MODULE_PARM_DESC(dev_loss_tmo, 67 "Maximum number of seconds that the FC transport should" 68 " insulate the loss of a remote port. Once this value is" 69 " exceeded, the scsi target is removed. Value should be" 70 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" 71 " fast_io_fail_tmo is not set."); 72 73 /* 74 * Redefine so that we can have same named attributes in the 75 * sdev/starget/host objects. 76 */ 77 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 78 struct device_attribute device_attr_##_prefix##_##_name = \ 79 __ATTR(_name,_mode,_show,_store) 80 81 #define fc_enum_name_search(title, table_type, table) \ 82 static const char *get_fc_##title##_name(enum table_type table_key) \ 83 { \ 84 int i; \ 85 char *name = NULL; \ 86 \ 87 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 88 if (table[i].value == table_key) { \ 89 name = table[i].name; \ 90 break; \ 91 } \ 92 } \ 93 return name; \ 94 } 95 96 #define fc_enum_name_match(title, table_type, table) \ 97 static int get_fc_##title##_match(const char *table_key, \ 98 enum table_type *value) \ 99 { \ 100 int i; \ 101 \ 102 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 103 if (strncmp(table_key, table[i].name, \ 104 table[i].matchlen) == 0) { \ 105 *value = table[i].value; \ 106 return 0; /* success */ \ 107 } \ 108 } \ 109 return 1; /* failure */ \ 110 } 111 112 113 /* Convert fc_port_type values to ascii string name */ 114 static struct { 115 enum fc_port_type value; 116 char *name; 117 } fc_port_type_names[] = { 118 { FC_PORTTYPE_UNKNOWN, "Unknown" }, 119 { FC_PORTTYPE_OTHER, "Other" }, 120 { FC_PORTTYPE_NOTPRESENT, "Not Present" }, 121 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, 122 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, 123 { FC_PORTTYPE_LPORT, "LPort (private loop)" }, 124 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, 125 { FC_PORTTYPE_NPIV, "NPIV VPORT" }, 126 }; 127 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) 128 #define FC_PORTTYPE_MAX_NAMELEN 50 129 130 /* Reuse fc_port_type enum function for vport_type */ 131 #define get_fc_vport_type_name get_fc_port_type_name 132 133 134 /* Convert fc_host_event_code values to ascii string name */ 135 static const struct { 136 enum fc_host_event_code value; 137 char *name; 138 } fc_host_event_code_names[] = { 139 { FCH_EVT_LIP, "lip" }, 140 { FCH_EVT_LINKUP, "link_up" }, 141 { FCH_EVT_LINKDOWN, "link_down" }, 142 { FCH_EVT_LIPRESET, "lip_reset" }, 143 { FCH_EVT_RSCN, "rscn" }, 144 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, 145 { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, 146 { FCH_EVT_PORT_ONLINE, "port_online" }, 147 { FCH_EVT_PORT_OFFLINE, "port_offline" }, 148 { FCH_EVT_PORT_FABRIC, "port_fabric" }, 149 { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, 150 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 151 }; 152 fc_enum_name_search(host_event_code, fc_host_event_code, 153 fc_host_event_code_names) 154 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 155 156 157 /* Convert fc_port_state values to ascii string name */ 158 static struct { 159 enum fc_port_state value; 160 char *name; 161 } fc_port_state_names[] = { 162 { FC_PORTSTATE_UNKNOWN, "Unknown" }, 163 { FC_PORTSTATE_NOTPRESENT, "Not Present" }, 164 { FC_PORTSTATE_ONLINE, "Online" }, 165 { FC_PORTSTATE_OFFLINE, "Offline" }, 166 { FC_PORTSTATE_BLOCKED, "Blocked" }, 167 { FC_PORTSTATE_BYPASSED, "Bypassed" }, 168 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, 169 { FC_PORTSTATE_LINKDOWN, "Linkdown" }, 170 { FC_PORTSTATE_ERROR, "Error" }, 171 { FC_PORTSTATE_LOOPBACK, "Loopback" }, 172 { FC_PORTSTATE_DELETED, "Deleted" }, 173 }; 174 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 175 #define FC_PORTSTATE_MAX_NAMELEN 20 176 177 178 /* Convert fc_vport_state values to ascii string name */ 179 static struct { 180 enum fc_vport_state value; 181 char *name; 182 } fc_vport_state_names[] = { 183 { FC_VPORT_UNKNOWN, "Unknown" }, 184 { FC_VPORT_ACTIVE, "Active" }, 185 { FC_VPORT_DISABLED, "Disabled" }, 186 { FC_VPORT_LINKDOWN, "Linkdown" }, 187 { FC_VPORT_INITIALIZING, "Initializing" }, 188 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 189 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 190 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 191 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 192 { FC_VPORT_FAILED, "VPort Failed" }, 193 }; 194 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 195 #define FC_VPORTSTATE_MAX_NAMELEN 24 196 197 /* Reuse fc_vport_state enum function for vport_last_state */ 198 #define get_fc_vport_last_state_name get_fc_vport_state_name 199 200 201 /* Convert fc_tgtid_binding_type values to ascii string name */ 202 static const struct { 203 enum fc_tgtid_binding_type value; 204 char *name; 205 int matchlen; 206 } fc_tgtid_binding_type_names[] = { 207 { FC_TGTID_BIND_NONE, "none", 4 }, 208 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 209 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 210 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 211 }; 212 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 213 fc_tgtid_binding_type_names) 214 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 215 fc_tgtid_binding_type_names) 216 #define FC_BINDTYPE_MAX_NAMELEN 30 217 218 219 #define fc_bitfield_name_search(title, table) \ 220 static ssize_t \ 221 get_fc_##title##_names(u32 table_key, char *buf) \ 222 { \ 223 char *prefix = ""; \ 224 ssize_t len = 0; \ 225 int i; \ 226 \ 227 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 228 if (table[i].value & table_key) { \ 229 len += sprintf(buf + len, "%s%s", \ 230 prefix, table[i].name); \ 231 prefix = ", "; \ 232 } \ 233 } \ 234 len += sprintf(buf + len, "\n"); \ 235 return len; \ 236 } 237 238 239 /* Convert FC_COS bit values to ascii string name */ 240 static const struct { 241 u32 value; 242 char *name; 243 } fc_cos_names[] = { 244 { FC_COS_CLASS1, "Class 1" }, 245 { FC_COS_CLASS2, "Class 2" }, 246 { FC_COS_CLASS3, "Class 3" }, 247 { FC_COS_CLASS4, "Class 4" }, 248 { FC_COS_CLASS6, "Class 6" }, 249 }; 250 fc_bitfield_name_search(cos, fc_cos_names) 251 252 253 /* Convert FC_PORTSPEED bit values to ascii string name */ 254 static const struct { 255 u32 value; 256 char *name; 257 } fc_port_speed_names[] = { 258 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 259 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 260 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 261 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 262 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 263 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 264 { FC_PORTSPEED_32GBIT, "32 Gbit" }, 265 { FC_PORTSPEED_20GBIT, "20 Gbit" }, 266 { FC_PORTSPEED_40GBIT, "40 Gbit" }, 267 { FC_PORTSPEED_50GBIT, "50 Gbit" }, 268 { FC_PORTSPEED_100GBIT, "100 Gbit" }, 269 { FC_PORTSPEED_25GBIT, "25 Gbit" }, 270 { FC_PORTSPEED_64GBIT, "64 Gbit" }, 271 { FC_PORTSPEED_128GBIT, "128 Gbit" }, 272 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 273 }; 274 fc_bitfield_name_search(port_speed, fc_port_speed_names) 275 276 277 static int 278 show_fc_fc4s (char *buf, u8 *fc4_list) 279 { 280 int i, len=0; 281 282 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 283 len += sprintf(buf + len , "0x%02x ", *fc4_list); 284 len += sprintf(buf + len, "\n"); 285 return len; 286 } 287 288 289 /* Convert FC_PORT_ROLE bit values to ascii string name */ 290 static const struct { 291 u32 value; 292 char *name; 293 } fc_port_role_names[] = { 294 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 295 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 296 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 297 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" }, 298 }; 299 fc_bitfield_name_search(port_roles, fc_port_role_names) 300 301 /* 302 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 303 */ 304 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 305 #define FC_WELLKNOWN_ROLE_MASK 0x00000f 306 #define FC_FPORT_PORTID 0x00000e 307 #define FC_FABCTLR_PORTID 0x00000d 308 #define FC_DIRSRVR_PORTID 0x00000c 309 #define FC_TIMESRVR_PORTID 0x00000b 310 #define FC_MGMTSRVR_PORTID 0x00000a 311 312 313 static void fc_timeout_deleted_rport(struct work_struct *work); 314 static void fc_timeout_fail_rport_io(struct work_struct *work); 315 static void fc_scsi_scan_rport(struct work_struct *work); 316 317 /* 318 * Attribute counts pre object type... 319 * Increase these values if you add attributes 320 */ 321 #define FC_STARGET_NUM_ATTRS 3 322 #define FC_RPORT_NUM_ATTRS 10 323 #define FC_VPORT_NUM_ATTRS 9 324 #define FC_HOST_NUM_ATTRS 29 325 326 struct fc_internal { 327 struct scsi_transport_template t; 328 struct fc_function_template *f; 329 330 /* 331 * For attributes : each object has : 332 * An array of the actual attributes structures 333 * An array of null-terminated pointers to the attribute 334 * structures - used for mid-layer interaction. 335 * 336 * The attribute containers for the starget and host are are 337 * part of the midlayer. As the remote port is specific to the 338 * fc transport, we must provide the attribute container. 339 */ 340 struct device_attribute private_starget_attrs[ 341 FC_STARGET_NUM_ATTRS]; 342 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 343 344 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 345 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 346 347 struct transport_container rport_attr_cont; 348 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 349 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 350 351 struct transport_container vport_attr_cont; 352 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 353 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 354 }; 355 356 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 357 358 static int fc_target_setup(struct transport_container *tc, struct device *dev, 359 struct device *cdev) 360 { 361 struct scsi_target *starget = to_scsi_target(dev); 362 struct fc_rport *rport = starget_to_rport(starget); 363 364 /* 365 * if parent is remote port, use values from remote port. 366 * Otherwise, this host uses the fc_transport, but not the 367 * remote port interface. As such, initialize to known non-values. 368 */ 369 if (rport) { 370 fc_starget_node_name(starget) = rport->node_name; 371 fc_starget_port_name(starget) = rport->port_name; 372 fc_starget_port_id(starget) = rport->port_id; 373 } else { 374 fc_starget_node_name(starget) = -1; 375 fc_starget_port_name(starget) = -1; 376 fc_starget_port_id(starget) = -1; 377 } 378 379 return 0; 380 } 381 382 static DECLARE_TRANSPORT_CLASS(fc_transport_class, 383 "fc_transport", 384 fc_target_setup, 385 NULL, 386 NULL); 387 388 static int fc_host_setup(struct transport_container *tc, struct device *dev, 389 struct device *cdev) 390 { 391 struct Scsi_Host *shost = dev_to_shost(dev); 392 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 393 394 /* 395 * Set default values easily detected by the midlayer as 396 * failure cases. The scsi lldd is responsible for initializing 397 * all transport attributes to valid values per host. 398 */ 399 fc_host->node_name = -1; 400 fc_host->port_name = -1; 401 fc_host->permanent_port_name = -1; 402 fc_host->supported_classes = FC_COS_UNSPECIFIED; 403 memset(fc_host->supported_fc4s, 0, 404 sizeof(fc_host->supported_fc4s)); 405 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 406 fc_host->maxframe_size = -1; 407 fc_host->max_npiv_vports = 0; 408 memset(fc_host->serial_number, 0, 409 sizeof(fc_host->serial_number)); 410 memset(fc_host->manufacturer, 0, 411 sizeof(fc_host->manufacturer)); 412 memset(fc_host->model, 0, 413 sizeof(fc_host->model)); 414 memset(fc_host->model_description, 0, 415 sizeof(fc_host->model_description)); 416 memset(fc_host->hardware_version, 0, 417 sizeof(fc_host->hardware_version)); 418 memset(fc_host->driver_version, 0, 419 sizeof(fc_host->driver_version)); 420 memset(fc_host->firmware_version, 0, 421 sizeof(fc_host->firmware_version)); 422 memset(fc_host->optionrom_version, 0, 423 sizeof(fc_host->optionrom_version)); 424 425 fc_host->port_id = -1; 426 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 427 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 428 memset(fc_host->active_fc4s, 0, 429 sizeof(fc_host->active_fc4s)); 430 fc_host->speed = FC_PORTSPEED_UNKNOWN; 431 fc_host->fabric_name = -1; 432 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 433 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 434 435 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 436 437 INIT_LIST_HEAD(&fc_host->rports); 438 INIT_LIST_HEAD(&fc_host->rport_bindings); 439 INIT_LIST_HEAD(&fc_host->vports); 440 fc_host->next_rport_number = 0; 441 fc_host->next_target_id = 0; 442 fc_host->next_vport_number = 0; 443 fc_host->npiv_vports_inuse = 0; 444 445 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 446 "fc_wq_%d", shost->host_no); 447 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); 448 if (!fc_host->work_q) 449 return -ENOMEM; 450 451 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 452 snprintf(fc_host->devloss_work_q_name, 453 sizeof(fc_host->devloss_work_q_name), 454 "fc_dl_%d", shost->host_no); 455 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, 456 fc_host->devloss_work_q_name); 457 if (!fc_host->devloss_work_q) { 458 destroy_workqueue(fc_host->work_q); 459 fc_host->work_q = NULL; 460 return -ENOMEM; 461 } 462 463 fc_bsg_hostadd(shost, fc_host); 464 /* ignore any bsg add error - we just can't do sgio */ 465 466 return 0; 467 } 468 469 static int fc_host_remove(struct transport_container *tc, struct device *dev, 470 struct device *cdev) 471 { 472 struct Scsi_Host *shost = dev_to_shost(dev); 473 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 474 475 fc_bsg_remove(fc_host->rqst_q); 476 return 0; 477 } 478 479 static DECLARE_TRANSPORT_CLASS(fc_host_class, 480 "fc_host", 481 fc_host_setup, 482 fc_host_remove, 483 NULL); 484 485 /* 486 * Setup and Remove actions for remote ports are handled 487 * in the service functions below. 488 */ 489 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 490 "fc_remote_ports", 491 NULL, 492 NULL, 493 NULL); 494 495 /* 496 * Setup and Remove actions for virtual ports are handled 497 * in the service functions below. 498 */ 499 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 500 "fc_vports", 501 NULL, 502 NULL, 503 NULL); 504 505 /* 506 * Netlink Infrastructure 507 */ 508 509 static atomic_t fc_event_seq; 510 511 /** 512 * fc_get_event_number - Obtain the next sequential FC event number 513 * 514 * Notes: 515 * We could have inlined this, but it would have required fc_event_seq to 516 * be exposed. For now, live with the subroutine call. 517 * Atomic used to avoid lock/unlock... 518 */ 519 u32 520 fc_get_event_number(void) 521 { 522 return atomic_add_return(1, &fc_event_seq); 523 } 524 EXPORT_SYMBOL(fc_get_event_number); 525 526 527 /** 528 * fc_host_post_event - called to post an even on an fc_host. 529 * @shost: host the event occurred on 530 * @event_number: fc event number obtained from get_fc_event_number() 531 * @event_code: fc_host event being posted 532 * @event_data: 32bits of data for the event being posted 533 * 534 * Notes: 535 * This routine assumes no locks are held on entry. 536 */ 537 void 538 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 539 enum fc_host_event_code event_code, u32 event_data) 540 { 541 struct sk_buff *skb; 542 struct nlmsghdr *nlh; 543 struct fc_nl_event *event; 544 const char *name; 545 u32 len; 546 int err; 547 548 if (!scsi_nl_sock) { 549 err = -ENOENT; 550 goto send_fail; 551 } 552 553 len = FC_NL_MSGALIGN(sizeof(*event)); 554 555 skb = nlmsg_new(len, GFP_KERNEL); 556 if (!skb) { 557 err = -ENOBUFS; 558 goto send_fail; 559 } 560 561 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 562 if (!nlh) { 563 err = -ENOBUFS; 564 goto send_fail_skb; 565 } 566 event = nlmsg_data(nlh); 567 568 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 569 FC_NL_ASYNC_EVENT, len); 570 event->seconds = get_seconds(); 571 event->vendor_id = 0; 572 event->host_no = shost->host_no; 573 event->event_datalen = sizeof(u32); /* bytes */ 574 event->event_num = event_number; 575 event->event_code = event_code; 576 event->event_data = event_data; 577 578 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 579 GFP_KERNEL); 580 return; 581 582 send_fail_skb: 583 kfree_skb(skb); 584 send_fail: 585 name = get_fc_host_event_code_name(event_code); 586 printk(KERN_WARNING 587 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 588 __func__, shost->host_no, 589 (name) ? name : "<unknown>", event_data, err); 590 return; 591 } 592 EXPORT_SYMBOL(fc_host_post_event); 593 594 595 /** 596 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host 597 * @shost: host the event occurred on 598 * @event_number: fc event number obtained from get_fc_event_number() 599 * @data_len: amount, in bytes, of vendor unique data 600 * @data_buf: pointer to vendor unique data 601 * @vendor_id: Vendor id 602 * 603 * Notes: 604 * This routine assumes no locks are held on entry. 605 */ 606 void 607 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 608 u32 data_len, char * data_buf, u64 vendor_id) 609 { 610 struct sk_buff *skb; 611 struct nlmsghdr *nlh; 612 struct fc_nl_event *event; 613 u32 len; 614 int err; 615 616 if (!scsi_nl_sock) { 617 err = -ENOENT; 618 goto send_vendor_fail; 619 } 620 621 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 622 623 skb = nlmsg_new(len, GFP_KERNEL); 624 if (!skb) { 625 err = -ENOBUFS; 626 goto send_vendor_fail; 627 } 628 629 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 630 if (!nlh) { 631 err = -ENOBUFS; 632 goto send_vendor_fail_skb; 633 } 634 event = nlmsg_data(nlh); 635 636 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 637 FC_NL_ASYNC_EVENT, len); 638 event->seconds = get_seconds(); 639 event->vendor_id = vendor_id; 640 event->host_no = shost->host_no; 641 event->event_datalen = data_len; /* bytes */ 642 event->event_num = event_number; 643 event->event_code = FCH_EVT_VENDOR_UNIQUE; 644 memcpy(&event->event_data, data_buf, data_len); 645 646 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 647 GFP_KERNEL); 648 return; 649 650 send_vendor_fail_skb: 651 kfree_skb(skb); 652 send_vendor_fail: 653 printk(KERN_WARNING 654 "%s: Dropped Event : host %d vendor_unique - err %d\n", 655 __func__, shost->host_no, err); 656 return; 657 } 658 EXPORT_SYMBOL(fc_host_post_vendor_event); 659 660 661 662 static __init int fc_transport_init(void) 663 { 664 int error; 665 666 atomic_set(&fc_event_seq, 0); 667 668 error = transport_class_register(&fc_host_class); 669 if (error) 670 return error; 671 error = transport_class_register(&fc_vport_class); 672 if (error) 673 goto unreg_host_class; 674 error = transport_class_register(&fc_rport_class); 675 if (error) 676 goto unreg_vport_class; 677 error = transport_class_register(&fc_transport_class); 678 if (error) 679 goto unreg_rport_class; 680 return 0; 681 682 unreg_rport_class: 683 transport_class_unregister(&fc_rport_class); 684 unreg_vport_class: 685 transport_class_unregister(&fc_vport_class); 686 unreg_host_class: 687 transport_class_unregister(&fc_host_class); 688 return error; 689 } 690 691 static void __exit fc_transport_exit(void) 692 { 693 transport_class_unregister(&fc_transport_class); 694 transport_class_unregister(&fc_rport_class); 695 transport_class_unregister(&fc_host_class); 696 transport_class_unregister(&fc_vport_class); 697 } 698 699 /* 700 * FC Remote Port Attribute Management 701 */ 702 703 #define fc_rport_show_function(field, format_string, sz, cast) \ 704 static ssize_t \ 705 show_fc_rport_##field (struct device *dev, \ 706 struct device_attribute *attr, char *buf) \ 707 { \ 708 struct fc_rport *rport = transport_class_to_rport(dev); \ 709 struct Scsi_Host *shost = rport_to_shost(rport); \ 710 struct fc_internal *i = to_fc_internal(shost->transportt); \ 711 if ((i->f->get_rport_##field) && \ 712 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 713 (rport->port_state == FC_PORTSTATE_DELETED) || \ 714 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 715 i->f->get_rport_##field(rport); \ 716 return snprintf(buf, sz, format_string, cast rport->field); \ 717 } 718 719 #define fc_rport_store_function(field) \ 720 static ssize_t \ 721 store_fc_rport_##field(struct device *dev, \ 722 struct device_attribute *attr, \ 723 const char *buf, size_t count) \ 724 { \ 725 int val; \ 726 struct fc_rport *rport = transport_class_to_rport(dev); \ 727 struct Scsi_Host *shost = rport_to_shost(rport); \ 728 struct fc_internal *i = to_fc_internal(shost->transportt); \ 729 char *cp; \ 730 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 731 (rport->port_state == FC_PORTSTATE_DELETED) || \ 732 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 733 return -EBUSY; \ 734 val = simple_strtoul(buf, &cp, 0); \ 735 if (*cp && (*cp != '\n')) \ 736 return -EINVAL; \ 737 i->f->set_rport_##field(rport, val); \ 738 return count; \ 739 } 740 741 #define fc_rport_rd_attr(field, format_string, sz) \ 742 fc_rport_show_function(field, format_string, sz, ) \ 743 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 744 show_fc_rport_##field, NULL) 745 746 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 747 fc_rport_show_function(field, format_string, sz, (cast)) \ 748 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 749 show_fc_rport_##field, NULL) 750 751 #define fc_rport_rw_attr(field, format_string, sz) \ 752 fc_rport_show_function(field, format_string, sz, ) \ 753 fc_rport_store_function(field) \ 754 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 755 show_fc_rport_##field, \ 756 store_fc_rport_##field) 757 758 759 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 760 static ssize_t \ 761 show_fc_rport_##field (struct device *dev, \ 762 struct device_attribute *attr, char *buf) \ 763 { \ 764 struct fc_rport *rport = transport_class_to_rport(dev); \ 765 return snprintf(buf, sz, format_string, cast rport->field); \ 766 } 767 768 #define fc_private_rport_rd_attr(field, format_string, sz) \ 769 fc_private_rport_show_function(field, format_string, sz, ) \ 770 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 771 show_fc_rport_##field, NULL) 772 773 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 774 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 775 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 776 show_fc_rport_##field, NULL) 777 778 779 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 780 static ssize_t \ 781 show_fc_rport_##title (struct device *dev, \ 782 struct device_attribute *attr, char *buf) \ 783 { \ 784 struct fc_rport *rport = transport_class_to_rport(dev); \ 785 const char *name; \ 786 name = get_fc_##title##_name(rport->title); \ 787 if (!name) \ 788 return -EINVAL; \ 789 return snprintf(buf, maxlen, "%s\n", name); \ 790 } \ 791 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 792 show_fc_rport_##title, NULL) 793 794 795 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 796 i->private_rport_attrs[count] = device_attr_rport_##field; \ 797 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 798 i->private_rport_attrs[count].store = NULL; \ 799 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 800 if (i->f->show_rport_##field) \ 801 count++ 802 803 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 804 i->private_rport_attrs[count] = device_attr_rport_##field; \ 805 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 806 i->private_rport_attrs[count].store = NULL; \ 807 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 808 count++ 809 810 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 811 i->private_rport_attrs[count] = device_attr_rport_##field; \ 812 if (!i->f->set_rport_##field) { \ 813 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 814 i->private_rport_attrs[count].store = NULL; \ 815 } \ 816 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 817 if (i->f->show_rport_##field) \ 818 count++ 819 820 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 821 { \ 822 i->private_rport_attrs[count] = device_attr_rport_##field; \ 823 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 824 count++; \ 825 } 826 827 828 /* The FC Transport Remote Port Attributes: */ 829 830 /* Fixed Remote Port Attributes */ 831 832 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 833 834 static ssize_t 835 show_fc_rport_supported_classes (struct device *dev, 836 struct device_attribute *attr, char *buf) 837 { 838 struct fc_rport *rport = transport_class_to_rport(dev); 839 if (rport->supported_classes == FC_COS_UNSPECIFIED) 840 return snprintf(buf, 20, "unspecified\n"); 841 return get_fc_cos_names(rport->supported_classes, buf); 842 } 843 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 844 show_fc_rport_supported_classes, NULL); 845 846 /* Dynamic Remote Port Attributes */ 847 848 /* 849 * dev_loss_tmo attribute 850 */ 851 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 852 { 853 char *cp; 854 855 *val = simple_strtoul(buf, &cp, 0); 856 if (*cp && (*cp != '\n')) 857 return -EINVAL; 858 /* 859 * Check for overflow; dev_loss_tmo is u32 860 */ 861 if (*val > UINT_MAX) 862 return -EINVAL; 863 864 return 0; 865 } 866 867 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 868 unsigned long val) 869 { 870 struct Scsi_Host *shost = rport_to_shost(rport); 871 struct fc_internal *i = to_fc_internal(shost->transportt); 872 873 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 874 (rport->port_state == FC_PORTSTATE_DELETED) || 875 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 876 return -EBUSY; 877 /* 878 * Check for overflow; dev_loss_tmo is u32 879 */ 880 if (val > UINT_MAX) 881 return -EINVAL; 882 883 /* 884 * If fast_io_fail is off we have to cap 885 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 886 */ 887 if (rport->fast_io_fail_tmo == -1 && 888 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 889 return -EINVAL; 890 891 i->f->set_rport_dev_loss_tmo(rport, val); 892 return 0; 893 } 894 895 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 896 static ssize_t 897 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 898 const char *buf, size_t count) 899 { 900 struct fc_rport *rport = transport_class_to_rport(dev); 901 unsigned long val; 902 int rc; 903 904 rc = fc_str_to_dev_loss(buf, &val); 905 if (rc) 906 return rc; 907 908 rc = fc_rport_set_dev_loss_tmo(rport, val); 909 if (rc) 910 return rc; 911 return count; 912 } 913 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 914 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 915 916 917 /* Private Remote Port Attributes */ 918 919 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 920 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 921 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 922 923 static ssize_t 924 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 925 char *buf) 926 { 927 struct fc_rport *rport = transport_class_to_rport(dev); 928 929 /* identify any roles that are port_id specific */ 930 if ((rport->port_id != -1) && 931 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 932 FC_WELLKNOWN_PORTID_MASK) { 933 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 934 case FC_FPORT_PORTID: 935 return snprintf(buf, 30, "Fabric Port\n"); 936 case FC_FABCTLR_PORTID: 937 return snprintf(buf, 30, "Fabric Controller\n"); 938 case FC_DIRSRVR_PORTID: 939 return snprintf(buf, 30, "Directory Server\n"); 940 case FC_TIMESRVR_PORTID: 941 return snprintf(buf, 30, "Time Server\n"); 942 case FC_MGMTSRVR_PORTID: 943 return snprintf(buf, 30, "Management Server\n"); 944 default: 945 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 946 } 947 } else { 948 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 949 return snprintf(buf, 20, "unknown\n"); 950 return get_fc_port_roles_names(rport->roles, buf); 951 } 952 } 953 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 954 show_fc_rport_roles, NULL); 955 956 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 957 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 958 959 /* 960 * fast_io_fail_tmo attribute 961 */ 962 static ssize_t 963 show_fc_rport_fast_io_fail_tmo (struct device *dev, 964 struct device_attribute *attr, char *buf) 965 { 966 struct fc_rport *rport = transport_class_to_rport(dev); 967 968 if (rport->fast_io_fail_tmo == -1) 969 return snprintf(buf, 5, "off\n"); 970 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 971 } 972 973 static ssize_t 974 store_fc_rport_fast_io_fail_tmo(struct device *dev, 975 struct device_attribute *attr, const char *buf, 976 size_t count) 977 { 978 int val; 979 char *cp; 980 struct fc_rport *rport = transport_class_to_rport(dev); 981 982 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 983 (rport->port_state == FC_PORTSTATE_DELETED) || 984 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 985 return -EBUSY; 986 if (strncmp(buf, "off", 3) == 0) 987 rport->fast_io_fail_tmo = -1; 988 else { 989 val = simple_strtoul(buf, &cp, 0); 990 if ((*cp && (*cp != '\n')) || (val < 0)) 991 return -EINVAL; 992 /* 993 * Cap fast_io_fail by dev_loss_tmo or 994 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 995 */ 996 if ((val >= rport->dev_loss_tmo) || 997 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 998 return -EINVAL; 999 1000 rport->fast_io_fail_tmo = val; 1001 } 1002 return count; 1003 } 1004 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 1005 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 1006 1007 1008 /* 1009 * FC SCSI Target Attribute Management 1010 */ 1011 1012 /* 1013 * Note: in the target show function we recognize when the remote 1014 * port is in the hierarchy and do not allow the driver to get 1015 * involved in sysfs functions. The driver only gets involved if 1016 * it's the "old" style that doesn't use rports. 1017 */ 1018 #define fc_starget_show_function(field, format_string, sz, cast) \ 1019 static ssize_t \ 1020 show_fc_starget_##field (struct device *dev, \ 1021 struct device_attribute *attr, char *buf) \ 1022 { \ 1023 struct scsi_target *starget = transport_class_to_starget(dev); \ 1024 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1025 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1026 struct fc_rport *rport = starget_to_rport(starget); \ 1027 if (rport) \ 1028 fc_starget_##field(starget) = rport->field; \ 1029 else if (i->f->get_starget_##field) \ 1030 i->f->get_starget_##field(starget); \ 1031 return snprintf(buf, sz, format_string, \ 1032 cast fc_starget_##field(starget)); \ 1033 } 1034 1035 #define fc_starget_rd_attr(field, format_string, sz) \ 1036 fc_starget_show_function(field, format_string, sz, ) \ 1037 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1038 show_fc_starget_##field, NULL) 1039 1040 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1041 fc_starget_show_function(field, format_string, sz, (cast)) \ 1042 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1043 show_fc_starget_##field, NULL) 1044 1045 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1046 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1047 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1048 i->private_starget_attrs[count].store = NULL; \ 1049 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1050 if (i->f->show_starget_##field) \ 1051 count++ 1052 1053 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1054 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1055 if (!i->f->set_starget_##field) { \ 1056 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1057 i->private_starget_attrs[count].store = NULL; \ 1058 } \ 1059 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1060 if (i->f->show_starget_##field) \ 1061 count++ 1062 1063 /* The FC Transport SCSI Target Attributes: */ 1064 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1065 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1066 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1067 1068 1069 /* 1070 * FC Virtual Port Attribute Management 1071 */ 1072 1073 #define fc_vport_show_function(field, format_string, sz, cast) \ 1074 static ssize_t \ 1075 show_fc_vport_##field (struct device *dev, \ 1076 struct device_attribute *attr, char *buf) \ 1077 { \ 1078 struct fc_vport *vport = transport_class_to_vport(dev); \ 1079 struct Scsi_Host *shost = vport_to_shost(vport); \ 1080 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1081 if ((i->f->get_vport_##field) && \ 1082 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1083 i->f->get_vport_##field(vport); \ 1084 return snprintf(buf, sz, format_string, cast vport->field); \ 1085 } 1086 1087 #define fc_vport_store_function(field) \ 1088 static ssize_t \ 1089 store_fc_vport_##field(struct device *dev, \ 1090 struct device_attribute *attr, \ 1091 const char *buf, size_t count) \ 1092 { \ 1093 int val; \ 1094 struct fc_vport *vport = transport_class_to_vport(dev); \ 1095 struct Scsi_Host *shost = vport_to_shost(vport); \ 1096 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1097 char *cp; \ 1098 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1099 return -EBUSY; \ 1100 val = simple_strtoul(buf, &cp, 0); \ 1101 if (*cp && (*cp != '\n')) \ 1102 return -EINVAL; \ 1103 i->f->set_vport_##field(vport, val); \ 1104 return count; \ 1105 } 1106 1107 #define fc_vport_store_str_function(field, slen) \ 1108 static ssize_t \ 1109 store_fc_vport_##field(struct device *dev, \ 1110 struct device_attribute *attr, \ 1111 const char *buf, size_t count) \ 1112 { \ 1113 struct fc_vport *vport = transport_class_to_vport(dev); \ 1114 struct Scsi_Host *shost = vport_to_shost(vport); \ 1115 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1116 unsigned int cnt=count; \ 1117 \ 1118 /* count may include a LF at end of string */ \ 1119 if (buf[cnt-1] == '\n') \ 1120 cnt--; \ 1121 if (cnt > ((slen) - 1)) \ 1122 return -EINVAL; \ 1123 memcpy(vport->field, buf, cnt); \ 1124 i->f->set_vport_##field(vport); \ 1125 return count; \ 1126 } 1127 1128 #define fc_vport_rd_attr(field, format_string, sz) \ 1129 fc_vport_show_function(field, format_string, sz, ) \ 1130 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1131 show_fc_vport_##field, NULL) 1132 1133 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1134 fc_vport_show_function(field, format_string, sz, (cast)) \ 1135 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1136 show_fc_vport_##field, NULL) 1137 1138 #define fc_vport_rw_attr(field, format_string, sz) \ 1139 fc_vport_show_function(field, format_string, sz, ) \ 1140 fc_vport_store_function(field) \ 1141 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1142 show_fc_vport_##field, \ 1143 store_fc_vport_##field) 1144 1145 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1146 static ssize_t \ 1147 show_fc_vport_##field (struct device *dev, \ 1148 struct device_attribute *attr, char *buf) \ 1149 { \ 1150 struct fc_vport *vport = transport_class_to_vport(dev); \ 1151 return snprintf(buf, sz, format_string, cast vport->field); \ 1152 } 1153 1154 #define fc_private_vport_store_u32_function(field) \ 1155 static ssize_t \ 1156 store_fc_vport_##field(struct device *dev, \ 1157 struct device_attribute *attr, \ 1158 const char *buf, size_t count) \ 1159 { \ 1160 u32 val; \ 1161 struct fc_vport *vport = transport_class_to_vport(dev); \ 1162 char *cp; \ 1163 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1164 return -EBUSY; \ 1165 val = simple_strtoul(buf, &cp, 0); \ 1166 if (*cp && (*cp != '\n')) \ 1167 return -EINVAL; \ 1168 vport->field = val; \ 1169 return count; \ 1170 } 1171 1172 1173 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1174 fc_private_vport_show_function(field, format_string, sz, ) \ 1175 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1176 show_fc_vport_##field, NULL) 1177 1178 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1179 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1180 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1181 show_fc_vport_##field, NULL) 1182 1183 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1184 fc_private_vport_show_function(field, format_string, sz, ) \ 1185 fc_private_vport_store_u32_function(field) \ 1186 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1187 show_fc_vport_##field, \ 1188 store_fc_vport_##field) 1189 1190 1191 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1192 static ssize_t \ 1193 show_fc_vport_##title (struct device *dev, \ 1194 struct device_attribute *attr, \ 1195 char *buf) \ 1196 { \ 1197 struct fc_vport *vport = transport_class_to_vport(dev); \ 1198 const char *name; \ 1199 name = get_fc_##title##_name(vport->title); \ 1200 if (!name) \ 1201 return -EINVAL; \ 1202 return snprintf(buf, maxlen, "%s\n", name); \ 1203 } \ 1204 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1205 show_fc_vport_##title, NULL) 1206 1207 1208 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1209 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1210 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1211 i->private_vport_attrs[count].store = NULL; \ 1212 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1213 if (i->f->get_##field) \ 1214 count++ 1215 /* NOTE: Above MACRO differs: checks function not show bit */ 1216 1217 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1218 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1219 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1220 i->private_vport_attrs[count].store = NULL; \ 1221 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1222 count++ 1223 1224 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1225 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1226 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1227 if (i->f->field) \ 1228 count++ 1229 /* NOTE: Above MACRO differs: checks function */ 1230 1231 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1232 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1233 if (!i->f->set_vport_##field) { \ 1234 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1235 i->private_vport_attrs[count].store = NULL; \ 1236 } \ 1237 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1238 count++ 1239 /* NOTE: Above MACRO differs: does not check show bit */ 1240 1241 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1242 { \ 1243 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1244 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1245 count++; \ 1246 } 1247 1248 1249 /* The FC Transport Virtual Port Attributes: */ 1250 1251 /* Fixed Virtual Port Attributes */ 1252 1253 /* Dynamic Virtual Port Attributes */ 1254 1255 /* Private Virtual Port Attributes */ 1256 1257 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1258 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1259 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1260 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1261 1262 static ssize_t 1263 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1264 char *buf) 1265 { 1266 struct fc_vport *vport = transport_class_to_vport(dev); 1267 1268 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1269 return snprintf(buf, 20, "unknown\n"); 1270 return get_fc_port_roles_names(vport->roles, buf); 1271 } 1272 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1273 1274 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1275 1276 fc_private_vport_show_function(symbolic_name, "%s\n", 1277 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1278 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1279 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1280 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1281 1282 static ssize_t 1283 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1284 const char *buf, size_t count) 1285 { 1286 struct fc_vport *vport = transport_class_to_vport(dev); 1287 struct Scsi_Host *shost = vport_to_shost(vport); 1288 unsigned long flags; 1289 1290 spin_lock_irqsave(shost->host_lock, flags); 1291 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) { 1292 spin_unlock_irqrestore(shost->host_lock, flags); 1293 return -EBUSY; 1294 } 1295 vport->flags |= FC_VPORT_DELETING; 1296 spin_unlock_irqrestore(shost->host_lock, flags); 1297 1298 fc_queue_work(shost, &vport->vport_delete_work); 1299 return count; 1300 } 1301 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1302 NULL, store_fc_vport_delete); 1303 1304 1305 /* 1306 * Enable/Disable vport 1307 * Write "1" to disable, write "0" to enable 1308 */ 1309 static ssize_t 1310 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1311 const char *buf, 1312 size_t count) 1313 { 1314 struct fc_vport *vport = transport_class_to_vport(dev); 1315 struct Scsi_Host *shost = vport_to_shost(vport); 1316 struct fc_internal *i = to_fc_internal(shost->transportt); 1317 int stat; 1318 1319 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1320 return -EBUSY; 1321 1322 if (*buf == '0') { 1323 if (vport->vport_state != FC_VPORT_DISABLED) 1324 return -EALREADY; 1325 } else if (*buf == '1') { 1326 if (vport->vport_state == FC_VPORT_DISABLED) 1327 return -EALREADY; 1328 } else 1329 return -EINVAL; 1330 1331 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1332 return stat ? stat : count; 1333 } 1334 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1335 NULL, store_fc_vport_disable); 1336 1337 1338 /* 1339 * Host Attribute Management 1340 */ 1341 1342 #define fc_host_show_function(field, format_string, sz, cast) \ 1343 static ssize_t \ 1344 show_fc_host_##field (struct device *dev, \ 1345 struct device_attribute *attr, char *buf) \ 1346 { \ 1347 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1348 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1349 if (i->f->get_host_##field) \ 1350 i->f->get_host_##field(shost); \ 1351 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1352 } 1353 1354 #define fc_host_store_function(field) \ 1355 static ssize_t \ 1356 store_fc_host_##field(struct device *dev, \ 1357 struct device_attribute *attr, \ 1358 const char *buf, size_t count) \ 1359 { \ 1360 int val; \ 1361 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1362 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1363 char *cp; \ 1364 \ 1365 val = simple_strtoul(buf, &cp, 0); \ 1366 if (*cp && (*cp != '\n')) \ 1367 return -EINVAL; \ 1368 i->f->set_host_##field(shost, val); \ 1369 return count; \ 1370 } 1371 1372 #define fc_host_store_str_function(field, slen) \ 1373 static ssize_t \ 1374 store_fc_host_##field(struct device *dev, \ 1375 struct device_attribute *attr, \ 1376 const char *buf, size_t count) \ 1377 { \ 1378 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1379 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1380 unsigned int cnt=count; \ 1381 \ 1382 /* count may include a LF at end of string */ \ 1383 if (buf[cnt-1] == '\n') \ 1384 cnt--; \ 1385 if (cnt > ((slen) - 1)) \ 1386 return -EINVAL; \ 1387 memcpy(fc_host_##field(shost), buf, cnt); \ 1388 i->f->set_host_##field(shost); \ 1389 return count; \ 1390 } 1391 1392 #define fc_host_rd_attr(field, format_string, sz) \ 1393 fc_host_show_function(field, format_string, sz, ) \ 1394 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1395 show_fc_host_##field, NULL) 1396 1397 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1398 fc_host_show_function(field, format_string, sz, (cast)) \ 1399 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1400 show_fc_host_##field, NULL) 1401 1402 #define fc_host_rw_attr(field, format_string, sz) \ 1403 fc_host_show_function(field, format_string, sz, ) \ 1404 fc_host_store_function(field) \ 1405 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1406 show_fc_host_##field, \ 1407 store_fc_host_##field) 1408 1409 #define fc_host_rd_enum_attr(title, maxlen) \ 1410 static ssize_t \ 1411 show_fc_host_##title (struct device *dev, \ 1412 struct device_attribute *attr, char *buf) \ 1413 { \ 1414 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1415 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1416 const char *name; \ 1417 if (i->f->get_host_##title) \ 1418 i->f->get_host_##title(shost); \ 1419 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1420 if (!name) \ 1421 return -EINVAL; \ 1422 return snprintf(buf, maxlen, "%s\n", name); \ 1423 } \ 1424 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1425 1426 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1427 i->private_host_attrs[count] = device_attr_host_##field; \ 1428 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1429 i->private_host_attrs[count].store = NULL; \ 1430 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1431 if (i->f->show_host_##field) \ 1432 count++ 1433 1434 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1435 i->private_host_attrs[count] = device_attr_host_##field; \ 1436 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1437 i->private_host_attrs[count].store = NULL; \ 1438 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1439 count++ 1440 1441 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1442 i->private_host_attrs[count] = device_attr_host_##field; \ 1443 if (!i->f->set_host_##field) { \ 1444 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1445 i->private_host_attrs[count].store = NULL; \ 1446 } \ 1447 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1448 if (i->f->show_host_##field) \ 1449 count++ 1450 1451 1452 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1453 static ssize_t \ 1454 show_fc_host_##field (struct device *dev, \ 1455 struct device_attribute *attr, char *buf) \ 1456 { \ 1457 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1458 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1459 } 1460 1461 #define fc_private_host_rd_attr(field, format_string, sz) \ 1462 fc_private_host_show_function(field, format_string, sz, ) \ 1463 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1464 show_fc_host_##field, NULL) 1465 1466 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1467 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1468 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1469 show_fc_host_##field, NULL) 1470 1471 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1472 i->private_host_attrs[count] = device_attr_host_##field; \ 1473 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1474 i->private_host_attrs[count].store = NULL; \ 1475 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1476 count++ 1477 1478 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1479 { \ 1480 i->private_host_attrs[count] = device_attr_host_##field; \ 1481 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1482 count++; \ 1483 } 1484 1485 1486 /* Fixed Host Attributes */ 1487 1488 static ssize_t 1489 show_fc_host_supported_classes (struct device *dev, 1490 struct device_attribute *attr, char *buf) 1491 { 1492 struct Scsi_Host *shost = transport_class_to_shost(dev); 1493 1494 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1495 return snprintf(buf, 20, "unspecified\n"); 1496 1497 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1498 } 1499 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1500 show_fc_host_supported_classes, NULL); 1501 1502 static ssize_t 1503 show_fc_host_supported_fc4s (struct device *dev, 1504 struct device_attribute *attr, char *buf) 1505 { 1506 struct Scsi_Host *shost = transport_class_to_shost(dev); 1507 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1508 } 1509 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1510 show_fc_host_supported_fc4s, NULL); 1511 1512 static ssize_t 1513 show_fc_host_supported_speeds (struct device *dev, 1514 struct device_attribute *attr, char *buf) 1515 { 1516 struct Scsi_Host *shost = transport_class_to_shost(dev); 1517 1518 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1519 return snprintf(buf, 20, "unknown\n"); 1520 1521 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1522 } 1523 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1524 show_fc_host_supported_speeds, NULL); 1525 1526 1527 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1528 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1529 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1530 unsigned long long); 1531 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1532 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1533 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1534 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1535 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1536 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1537 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1538 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1539 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1540 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1541 1542 1543 /* Dynamic Host Attributes */ 1544 1545 static ssize_t 1546 show_fc_host_active_fc4s (struct device *dev, 1547 struct device_attribute *attr, char *buf) 1548 { 1549 struct Scsi_Host *shost = transport_class_to_shost(dev); 1550 struct fc_internal *i = to_fc_internal(shost->transportt); 1551 1552 if (i->f->get_host_active_fc4s) 1553 i->f->get_host_active_fc4s(shost); 1554 1555 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1556 } 1557 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1558 show_fc_host_active_fc4s, NULL); 1559 1560 static ssize_t 1561 show_fc_host_speed (struct device *dev, 1562 struct device_attribute *attr, char *buf) 1563 { 1564 struct Scsi_Host *shost = transport_class_to_shost(dev); 1565 struct fc_internal *i = to_fc_internal(shost->transportt); 1566 1567 if (i->f->get_host_speed) 1568 i->f->get_host_speed(shost); 1569 1570 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1571 return snprintf(buf, 20, "unknown\n"); 1572 1573 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1574 } 1575 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1576 show_fc_host_speed, NULL); 1577 1578 1579 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1580 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1581 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1582 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1583 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1584 1585 fc_private_host_show_function(system_hostname, "%s\n", 1586 FC_SYMBOLIC_NAME_SIZE + 1, ) 1587 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1588 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1589 show_fc_host_system_hostname, store_fc_host_system_hostname); 1590 1591 1592 /* Private Host Attributes */ 1593 1594 static ssize_t 1595 show_fc_private_host_tgtid_bind_type(struct device *dev, 1596 struct device_attribute *attr, char *buf) 1597 { 1598 struct Scsi_Host *shost = transport_class_to_shost(dev); 1599 const char *name; 1600 1601 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1602 if (!name) 1603 return -EINVAL; 1604 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1605 } 1606 1607 #define get_list_head_entry(pos, head, member) \ 1608 pos = list_entry((head)->next, typeof(*pos), member) 1609 1610 static ssize_t 1611 store_fc_private_host_tgtid_bind_type(struct device *dev, 1612 struct device_attribute *attr, const char *buf, size_t count) 1613 { 1614 struct Scsi_Host *shost = transport_class_to_shost(dev); 1615 struct fc_rport *rport; 1616 enum fc_tgtid_binding_type val; 1617 unsigned long flags; 1618 1619 if (get_fc_tgtid_bind_type_match(buf, &val)) 1620 return -EINVAL; 1621 1622 /* if changing bind type, purge all unused consistent bindings */ 1623 if (val != fc_host_tgtid_bind_type(shost)) { 1624 spin_lock_irqsave(shost->host_lock, flags); 1625 while (!list_empty(&fc_host_rport_bindings(shost))) { 1626 get_list_head_entry(rport, 1627 &fc_host_rport_bindings(shost), peers); 1628 list_del(&rport->peers); 1629 rport->port_state = FC_PORTSTATE_DELETED; 1630 fc_queue_work(shost, &rport->rport_delete_work); 1631 } 1632 spin_unlock_irqrestore(shost->host_lock, flags); 1633 } 1634 1635 fc_host_tgtid_bind_type(shost) = val; 1636 return count; 1637 } 1638 1639 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1640 show_fc_private_host_tgtid_bind_type, 1641 store_fc_private_host_tgtid_bind_type); 1642 1643 static ssize_t 1644 store_fc_private_host_issue_lip(struct device *dev, 1645 struct device_attribute *attr, const char *buf, size_t count) 1646 { 1647 struct Scsi_Host *shost = transport_class_to_shost(dev); 1648 struct fc_internal *i = to_fc_internal(shost->transportt); 1649 int ret; 1650 1651 /* ignore any data value written to the attribute */ 1652 if (i->f->issue_fc_host_lip) { 1653 ret = i->f->issue_fc_host_lip(shost); 1654 return ret ? ret: count; 1655 } 1656 1657 return -ENOENT; 1658 } 1659 1660 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1661 store_fc_private_host_issue_lip); 1662 1663 static ssize_t 1664 store_fc_private_host_dev_loss_tmo(struct device *dev, 1665 struct device_attribute *attr, 1666 const char *buf, size_t count) 1667 { 1668 struct Scsi_Host *shost = transport_class_to_shost(dev); 1669 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1670 struct fc_rport *rport; 1671 unsigned long val, flags; 1672 int rc; 1673 1674 rc = fc_str_to_dev_loss(buf, &val); 1675 if (rc) 1676 return rc; 1677 1678 fc_host_dev_loss_tmo(shost) = val; 1679 spin_lock_irqsave(shost->host_lock, flags); 1680 list_for_each_entry(rport, &fc_host->rports, peers) 1681 fc_rport_set_dev_loss_tmo(rport, val); 1682 spin_unlock_irqrestore(shost->host_lock, flags); 1683 return count; 1684 } 1685 1686 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 1687 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 1688 show_fc_host_dev_loss_tmo, 1689 store_fc_private_host_dev_loss_tmo); 1690 1691 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1692 1693 /* 1694 * Host Statistics Management 1695 */ 1696 1697 /* Show a given attribute in the statistics group */ 1698 static ssize_t 1699 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1700 { 1701 struct Scsi_Host *shost = transport_class_to_shost(dev); 1702 struct fc_internal *i = to_fc_internal(shost->transportt); 1703 struct fc_host_statistics *stats; 1704 ssize_t ret = -ENOENT; 1705 1706 if (offset > sizeof(struct fc_host_statistics) || 1707 offset % sizeof(u64) != 0) 1708 WARN_ON(1); 1709 1710 if (i->f->get_fc_host_stats) { 1711 stats = (i->f->get_fc_host_stats)(shost); 1712 if (stats) 1713 ret = snprintf(buf, 20, "0x%llx\n", 1714 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1715 } 1716 return ret; 1717 } 1718 1719 1720 /* generate a read-only statistics attribute */ 1721 #define fc_host_statistic(name) \ 1722 static ssize_t show_fcstat_##name(struct device *cd, \ 1723 struct device_attribute *attr, \ 1724 char *buf) \ 1725 { \ 1726 return fc_stat_show(cd, buf, \ 1727 offsetof(struct fc_host_statistics, name)); \ 1728 } \ 1729 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1730 1731 fc_host_statistic(seconds_since_last_reset); 1732 fc_host_statistic(tx_frames); 1733 fc_host_statistic(tx_words); 1734 fc_host_statistic(rx_frames); 1735 fc_host_statistic(rx_words); 1736 fc_host_statistic(lip_count); 1737 fc_host_statistic(nos_count); 1738 fc_host_statistic(error_frames); 1739 fc_host_statistic(dumped_frames); 1740 fc_host_statistic(link_failure_count); 1741 fc_host_statistic(loss_of_sync_count); 1742 fc_host_statistic(loss_of_signal_count); 1743 fc_host_statistic(prim_seq_protocol_err_count); 1744 fc_host_statistic(invalid_tx_word_count); 1745 fc_host_statistic(invalid_crc_count); 1746 fc_host_statistic(fcp_input_requests); 1747 fc_host_statistic(fcp_output_requests); 1748 fc_host_statistic(fcp_control_requests); 1749 fc_host_statistic(fcp_input_megabytes); 1750 fc_host_statistic(fcp_output_megabytes); 1751 fc_host_statistic(fcp_packet_alloc_failures); 1752 fc_host_statistic(fcp_packet_aborts); 1753 fc_host_statistic(fcp_frame_alloc_failures); 1754 fc_host_statistic(fc_no_free_exch); 1755 fc_host_statistic(fc_no_free_exch_xid); 1756 fc_host_statistic(fc_xid_not_found); 1757 fc_host_statistic(fc_xid_busy); 1758 fc_host_statistic(fc_seq_not_found); 1759 fc_host_statistic(fc_non_bls_resp); 1760 1761 static ssize_t 1762 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1763 const char *buf, size_t count) 1764 { 1765 struct Scsi_Host *shost = transport_class_to_shost(dev); 1766 struct fc_internal *i = to_fc_internal(shost->transportt); 1767 1768 /* ignore any data value written to the attribute */ 1769 if (i->f->reset_fc_host_stats) { 1770 i->f->reset_fc_host_stats(shost); 1771 return count; 1772 } 1773 1774 return -ENOENT; 1775 } 1776 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1777 fc_reset_statistics); 1778 1779 static struct attribute *fc_statistics_attrs[] = { 1780 &device_attr_host_seconds_since_last_reset.attr, 1781 &device_attr_host_tx_frames.attr, 1782 &device_attr_host_tx_words.attr, 1783 &device_attr_host_rx_frames.attr, 1784 &device_attr_host_rx_words.attr, 1785 &device_attr_host_lip_count.attr, 1786 &device_attr_host_nos_count.attr, 1787 &device_attr_host_error_frames.attr, 1788 &device_attr_host_dumped_frames.attr, 1789 &device_attr_host_link_failure_count.attr, 1790 &device_attr_host_loss_of_sync_count.attr, 1791 &device_attr_host_loss_of_signal_count.attr, 1792 &device_attr_host_prim_seq_protocol_err_count.attr, 1793 &device_attr_host_invalid_tx_word_count.attr, 1794 &device_attr_host_invalid_crc_count.attr, 1795 &device_attr_host_fcp_input_requests.attr, 1796 &device_attr_host_fcp_output_requests.attr, 1797 &device_attr_host_fcp_control_requests.attr, 1798 &device_attr_host_fcp_input_megabytes.attr, 1799 &device_attr_host_fcp_output_megabytes.attr, 1800 &device_attr_host_fcp_packet_alloc_failures.attr, 1801 &device_attr_host_fcp_packet_aborts.attr, 1802 &device_attr_host_fcp_frame_alloc_failures.attr, 1803 &device_attr_host_fc_no_free_exch.attr, 1804 &device_attr_host_fc_no_free_exch_xid.attr, 1805 &device_attr_host_fc_xid_not_found.attr, 1806 &device_attr_host_fc_xid_busy.attr, 1807 &device_attr_host_fc_seq_not_found.attr, 1808 &device_attr_host_fc_non_bls_resp.attr, 1809 &device_attr_host_reset_statistics.attr, 1810 NULL 1811 }; 1812 1813 static struct attribute_group fc_statistics_group = { 1814 .name = "statistics", 1815 .attrs = fc_statistics_attrs, 1816 }; 1817 1818 1819 /* Host Vport Attributes */ 1820 1821 static int 1822 fc_parse_wwn(const char *ns, u64 *nm) 1823 { 1824 unsigned int i, j; 1825 u8 wwn[8]; 1826 1827 memset(wwn, 0, sizeof(wwn)); 1828 1829 /* Validate and store the new name */ 1830 for (i=0, j=0; i < 16; i++) { 1831 int value; 1832 1833 value = hex_to_bin(*ns++); 1834 if (value >= 0) 1835 j = (j << 4) | value; 1836 else 1837 return -EINVAL; 1838 if (i % 2) { 1839 wwn[i/2] = j & 0xff; 1840 j = 0; 1841 } 1842 } 1843 1844 *nm = wwn_to_u64(wwn); 1845 1846 return 0; 1847 } 1848 1849 1850 /* 1851 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1852 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1853 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1854 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1855 */ 1856 static ssize_t 1857 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1858 const char *buf, size_t count) 1859 { 1860 struct Scsi_Host *shost = transport_class_to_shost(dev); 1861 struct fc_vport_identifiers vid; 1862 struct fc_vport *vport; 1863 unsigned int cnt=count; 1864 int stat; 1865 1866 memset(&vid, 0, sizeof(vid)); 1867 1868 /* count may include a LF at end of string */ 1869 if (buf[cnt-1] == '\n') 1870 cnt--; 1871 1872 /* validate we have enough characters for WWPN */ 1873 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1874 return -EINVAL; 1875 1876 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1877 if (stat) 1878 return stat; 1879 1880 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1881 if (stat) 1882 return stat; 1883 1884 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1885 vid.vport_type = FC_PORTTYPE_NPIV; 1886 /* vid.symbolic_name is already zero/NULL's */ 1887 vid.disable = false; /* always enabled */ 1888 1889 /* we only allow support on Channel 0 !!! */ 1890 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1891 return stat ? stat : count; 1892 } 1893 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1894 store_fc_host_vport_create); 1895 1896 1897 /* 1898 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1899 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1900 * The WWNs are specified as hex characters, and may *not* contain 1901 * any prefixes (e.g. 0x, x, etc) 1902 */ 1903 static ssize_t 1904 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1905 const char *buf, size_t count) 1906 { 1907 struct Scsi_Host *shost = transport_class_to_shost(dev); 1908 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1909 struct fc_vport *vport; 1910 u64 wwpn, wwnn; 1911 unsigned long flags; 1912 unsigned int cnt=count; 1913 int stat, match; 1914 1915 /* count may include a LF at end of string */ 1916 if (buf[cnt-1] == '\n') 1917 cnt--; 1918 1919 /* validate we have enough characters for WWPN */ 1920 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1921 return -EINVAL; 1922 1923 stat = fc_parse_wwn(&buf[0], &wwpn); 1924 if (stat) 1925 return stat; 1926 1927 stat = fc_parse_wwn(&buf[17], &wwnn); 1928 if (stat) 1929 return stat; 1930 1931 spin_lock_irqsave(shost->host_lock, flags); 1932 match = 0; 1933 /* we only allow support on Channel 0 !!! */ 1934 list_for_each_entry(vport, &fc_host->vports, peers) { 1935 if ((vport->channel == 0) && 1936 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1937 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1938 break; 1939 vport->flags |= FC_VPORT_DELETING; 1940 match = 1; 1941 break; 1942 } 1943 } 1944 spin_unlock_irqrestore(shost->host_lock, flags); 1945 1946 if (!match) 1947 return -ENODEV; 1948 1949 stat = fc_vport_terminate(vport); 1950 return stat ? stat : count; 1951 } 1952 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1953 store_fc_host_vport_delete); 1954 1955 1956 static int fc_host_match(struct attribute_container *cont, 1957 struct device *dev) 1958 { 1959 struct Scsi_Host *shost; 1960 struct fc_internal *i; 1961 1962 if (!scsi_is_host_device(dev)) 1963 return 0; 1964 1965 shost = dev_to_shost(dev); 1966 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1967 != &fc_host_class.class) 1968 return 0; 1969 1970 i = to_fc_internal(shost->transportt); 1971 1972 return &i->t.host_attrs.ac == cont; 1973 } 1974 1975 static int fc_target_match(struct attribute_container *cont, 1976 struct device *dev) 1977 { 1978 struct Scsi_Host *shost; 1979 struct fc_internal *i; 1980 1981 if (!scsi_is_target_device(dev)) 1982 return 0; 1983 1984 shost = dev_to_shost(dev->parent); 1985 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1986 != &fc_host_class.class) 1987 return 0; 1988 1989 i = to_fc_internal(shost->transportt); 1990 1991 return &i->t.target_attrs.ac == cont; 1992 } 1993 1994 static void fc_rport_dev_release(struct device *dev) 1995 { 1996 struct fc_rport *rport = dev_to_rport(dev); 1997 put_device(dev->parent); 1998 kfree(rport); 1999 } 2000 2001 int scsi_is_fc_rport(const struct device *dev) 2002 { 2003 return dev->release == fc_rport_dev_release; 2004 } 2005 EXPORT_SYMBOL(scsi_is_fc_rport); 2006 2007 static int fc_rport_match(struct attribute_container *cont, 2008 struct device *dev) 2009 { 2010 struct Scsi_Host *shost; 2011 struct fc_internal *i; 2012 2013 if (!scsi_is_fc_rport(dev)) 2014 return 0; 2015 2016 shost = dev_to_shost(dev->parent); 2017 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2018 != &fc_host_class.class) 2019 return 0; 2020 2021 i = to_fc_internal(shost->transportt); 2022 2023 return &i->rport_attr_cont.ac == cont; 2024 } 2025 2026 2027 static void fc_vport_dev_release(struct device *dev) 2028 { 2029 struct fc_vport *vport = dev_to_vport(dev); 2030 put_device(dev->parent); /* release kobj parent */ 2031 kfree(vport); 2032 } 2033 2034 static int scsi_is_fc_vport(const struct device *dev) 2035 { 2036 return dev->release == fc_vport_dev_release; 2037 } 2038 2039 static int fc_vport_match(struct attribute_container *cont, 2040 struct device *dev) 2041 { 2042 struct fc_vport *vport; 2043 struct Scsi_Host *shost; 2044 struct fc_internal *i; 2045 2046 if (!scsi_is_fc_vport(dev)) 2047 return 0; 2048 vport = dev_to_vport(dev); 2049 2050 shost = vport_to_shost(vport); 2051 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2052 != &fc_host_class.class) 2053 return 0; 2054 2055 i = to_fc_internal(shost->transportt); 2056 return &i->vport_attr_cont.ac == cont; 2057 } 2058 2059 2060 /** 2061 * fc_eh_timed_out - FC Transport I/O timeout intercept handler 2062 * @scmd: The SCSI command which timed out 2063 * 2064 * This routine protects against error handlers getting invoked while a 2065 * rport is in a blocked state, typically due to a temporarily loss of 2066 * connectivity. If the error handlers are allowed to proceed, requests 2067 * to abort i/o, reset the target, etc will likely fail as there is no way 2068 * to communicate with the device to perform the requested function. These 2069 * failures may result in the midlayer taking the device offline, requiring 2070 * manual intervention to restore operation. 2071 * 2072 * This routine, called whenever an i/o times out, validates the state of 2073 * the underlying rport. If the rport is blocked, it returns 2074 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2075 * Eventually, either the device will return, or devloss_tmo will fire, 2076 * and when the timeout then fires, it will be handled normally. 2077 * If the rport is not blocked, normal error handling continues. 2078 * 2079 * Notes: 2080 * This routine assumes no locks are held on entry. 2081 */ 2082 enum blk_eh_timer_return 2083 fc_eh_timed_out(struct scsi_cmnd *scmd) 2084 { 2085 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2086 2087 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2088 return BLK_EH_RESET_TIMER; 2089 2090 return BLK_EH_DONE; 2091 } 2092 EXPORT_SYMBOL(fc_eh_timed_out); 2093 2094 /* 2095 * Called by fc_user_scan to locate an rport on the shost that 2096 * matches the channel and target id, and invoke scsi_scan_target() 2097 * on the rport. 2098 */ 2099 static void 2100 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2101 { 2102 struct fc_rport *rport; 2103 unsigned long flags; 2104 2105 spin_lock_irqsave(shost->host_lock, flags); 2106 2107 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2108 if (rport->scsi_target_id == -1) 2109 continue; 2110 2111 if (rport->port_state != FC_PORTSTATE_ONLINE) 2112 continue; 2113 2114 if ((channel == rport->channel) && 2115 (id == rport->scsi_target_id)) { 2116 spin_unlock_irqrestore(shost->host_lock, flags); 2117 scsi_scan_target(&rport->dev, channel, id, lun, 2118 SCSI_SCAN_MANUAL); 2119 return; 2120 } 2121 } 2122 2123 spin_unlock_irqrestore(shost->host_lock, flags); 2124 } 2125 2126 /* 2127 * Called via sysfs scan routines. Necessary, as the FC transport 2128 * wants to place all target objects below the rport object. So this 2129 * routine must invoke the scsi_scan_target() routine with the rport 2130 * object as the parent. 2131 */ 2132 static int 2133 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2134 { 2135 uint chlo, chhi; 2136 uint tgtlo, tgthi; 2137 2138 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2139 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2140 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2141 return -EINVAL; 2142 2143 if (channel == SCAN_WILD_CARD) { 2144 chlo = 0; 2145 chhi = shost->max_channel + 1; 2146 } else { 2147 chlo = channel; 2148 chhi = channel + 1; 2149 } 2150 2151 if (id == SCAN_WILD_CARD) { 2152 tgtlo = 0; 2153 tgthi = shost->max_id; 2154 } else { 2155 tgtlo = id; 2156 tgthi = id + 1; 2157 } 2158 2159 for ( ; chlo < chhi; chlo++) 2160 for ( ; tgtlo < tgthi; tgtlo++) 2161 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2162 2163 return 0; 2164 } 2165 2166 struct scsi_transport_template * 2167 fc_attach_transport(struct fc_function_template *ft) 2168 { 2169 int count; 2170 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2171 GFP_KERNEL); 2172 2173 if (unlikely(!i)) 2174 return NULL; 2175 2176 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2177 i->t.target_attrs.ac.class = &fc_transport_class.class; 2178 i->t.target_attrs.ac.match = fc_target_match; 2179 i->t.target_size = sizeof(struct fc_starget_attrs); 2180 transport_container_register(&i->t.target_attrs); 2181 2182 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2183 i->t.host_attrs.ac.class = &fc_host_class.class; 2184 i->t.host_attrs.ac.match = fc_host_match; 2185 i->t.host_size = sizeof(struct fc_host_attrs); 2186 if (ft->get_fc_host_stats) 2187 i->t.host_attrs.statistics = &fc_statistics_group; 2188 transport_container_register(&i->t.host_attrs); 2189 2190 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2191 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2192 i->rport_attr_cont.ac.match = fc_rport_match; 2193 transport_container_register(&i->rport_attr_cont); 2194 2195 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2196 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2197 i->vport_attr_cont.ac.match = fc_vport_match; 2198 transport_container_register(&i->vport_attr_cont); 2199 2200 i->f = ft; 2201 2202 /* Transport uses the shost workq for scsi scanning */ 2203 i->t.create_work_queue = 1; 2204 2205 i->t.user_scan = fc_user_scan; 2206 2207 /* 2208 * Setup SCSI Target Attributes. 2209 */ 2210 count = 0; 2211 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2212 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2213 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2214 2215 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2216 2217 i->starget_attrs[count] = NULL; 2218 2219 2220 /* 2221 * Setup SCSI Host Attributes. 2222 */ 2223 count=0; 2224 SETUP_HOST_ATTRIBUTE_RD(node_name); 2225 SETUP_HOST_ATTRIBUTE_RD(port_name); 2226 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2227 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2228 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2229 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2230 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2231 if (ft->vport_create) { 2232 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2233 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2234 } 2235 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2236 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2237 SETUP_HOST_ATTRIBUTE_RD(model); 2238 SETUP_HOST_ATTRIBUTE_RD(model_description); 2239 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2240 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2241 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2242 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2243 2244 SETUP_HOST_ATTRIBUTE_RD(port_id); 2245 SETUP_HOST_ATTRIBUTE_RD(port_type); 2246 SETUP_HOST_ATTRIBUTE_RD(port_state); 2247 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2248 SETUP_HOST_ATTRIBUTE_RD(speed); 2249 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2250 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2251 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2252 2253 /* Transport-managed attributes */ 2254 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2255 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2256 if (ft->issue_fc_host_lip) 2257 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2258 if (ft->vport_create) 2259 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2260 if (ft->vport_delete) 2261 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2262 2263 BUG_ON(count > FC_HOST_NUM_ATTRS); 2264 2265 i->host_attrs[count] = NULL; 2266 2267 /* 2268 * Setup Remote Port Attributes. 2269 */ 2270 count=0; 2271 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2272 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2273 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2274 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2275 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2276 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2277 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2278 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2279 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2280 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2281 2282 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2283 2284 i->rport_attrs[count] = NULL; 2285 2286 /* 2287 * Setup Virtual Port Attributes. 2288 */ 2289 count=0; 2290 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2291 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2292 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2293 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2294 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2295 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2296 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2297 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2298 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2299 2300 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2301 2302 i->vport_attrs[count] = NULL; 2303 2304 return &i->t; 2305 } 2306 EXPORT_SYMBOL(fc_attach_transport); 2307 2308 void fc_release_transport(struct scsi_transport_template *t) 2309 { 2310 struct fc_internal *i = to_fc_internal(t); 2311 2312 transport_container_unregister(&i->t.target_attrs); 2313 transport_container_unregister(&i->t.host_attrs); 2314 transport_container_unregister(&i->rport_attr_cont); 2315 transport_container_unregister(&i->vport_attr_cont); 2316 2317 kfree(i); 2318 } 2319 EXPORT_SYMBOL(fc_release_transport); 2320 2321 /** 2322 * fc_queue_work - Queue work to the fc_host workqueue. 2323 * @shost: Pointer to Scsi_Host bound to fc_host. 2324 * @work: Work to queue for execution. 2325 * 2326 * Return value: 2327 * 1 - work queued for execution 2328 * 0 - work is already queued 2329 * -EINVAL - work queue doesn't exist 2330 */ 2331 static int 2332 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2333 { 2334 if (unlikely(!fc_host_work_q(shost))) { 2335 printk(KERN_ERR 2336 "ERROR: FC host '%s' attempted to queue work, " 2337 "when no workqueue created.\n", shost->hostt->name); 2338 dump_stack(); 2339 2340 return -EINVAL; 2341 } 2342 2343 return queue_work(fc_host_work_q(shost), work); 2344 } 2345 2346 /** 2347 * fc_flush_work - Flush a fc_host's workqueue. 2348 * @shost: Pointer to Scsi_Host bound to fc_host. 2349 */ 2350 static void 2351 fc_flush_work(struct Scsi_Host *shost) 2352 { 2353 if (!fc_host_work_q(shost)) { 2354 printk(KERN_ERR 2355 "ERROR: FC host '%s' attempted to flush work, " 2356 "when no workqueue created.\n", shost->hostt->name); 2357 dump_stack(); 2358 return; 2359 } 2360 2361 flush_workqueue(fc_host_work_q(shost)); 2362 } 2363 2364 /** 2365 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2366 * @shost: Pointer to Scsi_Host bound to fc_host. 2367 * @work: Work to queue for execution. 2368 * @delay: jiffies to delay the work queuing 2369 * 2370 * Return value: 2371 * 1 on success / 0 already queued / < 0 for error 2372 */ 2373 static int 2374 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2375 unsigned long delay) 2376 { 2377 if (unlikely(!fc_host_devloss_work_q(shost))) { 2378 printk(KERN_ERR 2379 "ERROR: FC host '%s' attempted to queue work, " 2380 "when no workqueue created.\n", shost->hostt->name); 2381 dump_stack(); 2382 2383 return -EINVAL; 2384 } 2385 2386 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2387 } 2388 2389 /** 2390 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2391 * @shost: Pointer to Scsi_Host bound to fc_host. 2392 */ 2393 static void 2394 fc_flush_devloss(struct Scsi_Host *shost) 2395 { 2396 if (!fc_host_devloss_work_q(shost)) { 2397 printk(KERN_ERR 2398 "ERROR: FC host '%s' attempted to flush work, " 2399 "when no workqueue created.\n", shost->hostt->name); 2400 dump_stack(); 2401 return; 2402 } 2403 2404 flush_workqueue(fc_host_devloss_work_q(shost)); 2405 } 2406 2407 2408 /** 2409 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2410 * @shost: Which &Scsi_Host 2411 * 2412 * This routine is expected to be called immediately preceding the 2413 * a driver's call to scsi_remove_host(). 2414 * 2415 * WARNING: A driver utilizing the fc_transport, which fails to call 2416 * this routine prior to scsi_remove_host(), will leave dangling 2417 * objects in /sys/class/fc_remote_ports. Access to any of these 2418 * objects can result in a system crash !!! 2419 * 2420 * Notes: 2421 * This routine assumes no locks are held on entry. 2422 */ 2423 void 2424 fc_remove_host(struct Scsi_Host *shost) 2425 { 2426 struct fc_vport *vport = NULL, *next_vport = NULL; 2427 struct fc_rport *rport = NULL, *next_rport = NULL; 2428 struct workqueue_struct *work_q; 2429 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2430 unsigned long flags; 2431 2432 spin_lock_irqsave(shost->host_lock, flags); 2433 2434 /* Remove any vports */ 2435 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2436 vport->flags |= FC_VPORT_DELETING; 2437 fc_queue_work(shost, &vport->vport_delete_work); 2438 } 2439 2440 /* Remove any remote ports */ 2441 list_for_each_entry_safe(rport, next_rport, 2442 &fc_host->rports, peers) { 2443 list_del(&rport->peers); 2444 rport->port_state = FC_PORTSTATE_DELETED; 2445 fc_queue_work(shost, &rport->rport_delete_work); 2446 } 2447 2448 list_for_each_entry_safe(rport, next_rport, 2449 &fc_host->rport_bindings, peers) { 2450 list_del(&rport->peers); 2451 rport->port_state = FC_PORTSTATE_DELETED; 2452 fc_queue_work(shost, &rport->rport_delete_work); 2453 } 2454 2455 spin_unlock_irqrestore(shost->host_lock, flags); 2456 2457 /* flush all scan work items */ 2458 scsi_flush_work(shost); 2459 2460 /* flush all stgt delete, and rport delete work items, then kill it */ 2461 if (fc_host->work_q) { 2462 work_q = fc_host->work_q; 2463 fc_host->work_q = NULL; 2464 destroy_workqueue(work_q); 2465 } 2466 2467 /* flush all devloss work items, then kill it */ 2468 if (fc_host->devloss_work_q) { 2469 work_q = fc_host->devloss_work_q; 2470 fc_host->devloss_work_q = NULL; 2471 destroy_workqueue(work_q); 2472 } 2473 } 2474 EXPORT_SYMBOL(fc_remove_host); 2475 2476 static void fc_terminate_rport_io(struct fc_rport *rport) 2477 { 2478 struct Scsi_Host *shost = rport_to_shost(rport); 2479 struct fc_internal *i = to_fc_internal(shost->transportt); 2480 2481 /* Involve the LLDD if possible to terminate all io on the rport. */ 2482 if (i->f->terminate_rport_io) 2483 i->f->terminate_rport_io(rport); 2484 2485 /* 2486 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2487 */ 2488 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2489 } 2490 2491 /** 2492 * fc_starget_delete - called to delete the scsi descendants of an rport 2493 * @work: remote port to be operated on. 2494 * 2495 * Deletes target and all sdevs. 2496 */ 2497 static void 2498 fc_starget_delete(struct work_struct *work) 2499 { 2500 struct fc_rport *rport = 2501 container_of(work, struct fc_rport, stgt_delete_work); 2502 2503 fc_terminate_rport_io(rport); 2504 scsi_remove_target(&rport->dev); 2505 } 2506 2507 2508 /** 2509 * fc_rport_final_delete - finish rport termination and delete it. 2510 * @work: remote port to be deleted. 2511 */ 2512 static void 2513 fc_rport_final_delete(struct work_struct *work) 2514 { 2515 struct fc_rport *rport = 2516 container_of(work, struct fc_rport, rport_delete_work); 2517 struct device *dev = &rport->dev; 2518 struct Scsi_Host *shost = rport_to_shost(rport); 2519 struct fc_internal *i = to_fc_internal(shost->transportt); 2520 unsigned long flags; 2521 int do_callback = 0; 2522 2523 fc_terminate_rport_io(rport); 2524 2525 /* 2526 * if a scan is pending, flush the SCSI Host work_q so that 2527 * that we can reclaim the rport scan work element. 2528 */ 2529 if (rport->flags & FC_RPORT_SCAN_PENDING) 2530 scsi_flush_work(shost); 2531 2532 /* 2533 * Cancel any outstanding timers. These should really exist 2534 * only when rmmod'ing the LLDD and we're asking for 2535 * immediate termination of the rports 2536 */ 2537 spin_lock_irqsave(shost->host_lock, flags); 2538 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2539 spin_unlock_irqrestore(shost->host_lock, flags); 2540 if (!cancel_delayed_work(&rport->fail_io_work)) 2541 fc_flush_devloss(shost); 2542 if (!cancel_delayed_work(&rport->dev_loss_work)) 2543 fc_flush_devloss(shost); 2544 cancel_work_sync(&rport->scan_work); 2545 spin_lock_irqsave(shost->host_lock, flags); 2546 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2547 } 2548 spin_unlock_irqrestore(shost->host_lock, flags); 2549 2550 /* Delete SCSI target and sdevs */ 2551 if (rport->scsi_target_id != -1) 2552 fc_starget_delete(&rport->stgt_delete_work); 2553 2554 /* 2555 * Notify the driver that the rport is now dead. The LLDD will 2556 * also guarantee that any communication to the rport is terminated 2557 * 2558 * Avoid this call if we already called it when we preserved the 2559 * rport for the binding. 2560 */ 2561 spin_lock_irqsave(shost->host_lock, flags); 2562 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2563 (i->f->dev_loss_tmo_callbk)) { 2564 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2565 do_callback = 1; 2566 } 2567 spin_unlock_irqrestore(shost->host_lock, flags); 2568 2569 if (do_callback) 2570 i->f->dev_loss_tmo_callbk(rport); 2571 2572 fc_bsg_remove(rport->rqst_q); 2573 2574 transport_remove_device(dev); 2575 device_del(dev); 2576 transport_destroy_device(dev); 2577 scsi_host_put(shost); /* for fc_host->rport list */ 2578 put_device(dev); /* for self-reference */ 2579 } 2580 2581 2582 /** 2583 * fc_remote_port_create - allocates and creates a remote FC port. 2584 * @shost: scsi host the remote port is connected to. 2585 * @channel: Channel on shost port connected to. 2586 * @ids: The world wide names, fc address, and FC4 port 2587 * roles for the remote port. 2588 * 2589 * Allocates and creates the remoter port structure, including the 2590 * class and sysfs creation. 2591 * 2592 * Notes: 2593 * This routine assumes no locks are held on entry. 2594 */ 2595 static struct fc_rport * 2596 fc_remote_port_create(struct Scsi_Host *shost, int channel, 2597 struct fc_rport_identifiers *ids) 2598 { 2599 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2600 struct fc_internal *fci = to_fc_internal(shost->transportt); 2601 struct fc_rport *rport; 2602 struct device *dev; 2603 unsigned long flags; 2604 int error; 2605 size_t size; 2606 2607 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2608 rport = kzalloc(size, GFP_KERNEL); 2609 if (unlikely(!rport)) { 2610 printk(KERN_ERR "%s: allocation failure\n", __func__); 2611 return NULL; 2612 } 2613 2614 rport->maxframe_size = -1; 2615 rport->supported_classes = FC_COS_UNSPECIFIED; 2616 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2617 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2618 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2619 rport->port_id = ids->port_id; 2620 rport->roles = ids->roles; 2621 rport->port_state = FC_PORTSTATE_ONLINE; 2622 if (fci->f->dd_fcrport_size) 2623 rport->dd_data = &rport[1]; 2624 rport->channel = channel; 2625 rport->fast_io_fail_tmo = -1; 2626 2627 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2628 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2629 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2630 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2631 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2632 2633 spin_lock_irqsave(shost->host_lock, flags); 2634 2635 rport->number = fc_host->next_rport_number++; 2636 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) || 2637 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) 2638 rport->scsi_target_id = fc_host->next_target_id++; 2639 else 2640 rport->scsi_target_id = -1; 2641 list_add_tail(&rport->peers, &fc_host->rports); 2642 scsi_host_get(shost); /* for fc_host->rport list */ 2643 2644 spin_unlock_irqrestore(shost->host_lock, flags); 2645 2646 dev = &rport->dev; 2647 device_initialize(dev); /* takes self reference */ 2648 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2649 dev->release = fc_rport_dev_release; 2650 dev_set_name(dev, "rport-%d:%d-%d", 2651 shost->host_no, channel, rport->number); 2652 transport_setup_device(dev); 2653 2654 error = device_add(dev); 2655 if (error) { 2656 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2657 goto delete_rport; 2658 } 2659 transport_add_device(dev); 2660 transport_configure_device(dev); 2661 2662 fc_bsg_rportadd(shost, rport); 2663 /* ignore any bsg add error - we just can't do sgio */ 2664 2665 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2666 /* initiate a scan of the target */ 2667 rport->flags |= FC_RPORT_SCAN_PENDING; 2668 scsi_queue_work(shost, &rport->scan_work); 2669 } 2670 2671 return rport; 2672 2673 delete_rport: 2674 transport_destroy_device(dev); 2675 spin_lock_irqsave(shost->host_lock, flags); 2676 list_del(&rport->peers); 2677 scsi_host_put(shost); /* for fc_host->rport list */ 2678 spin_unlock_irqrestore(shost->host_lock, flags); 2679 put_device(dev->parent); 2680 kfree(rport); 2681 return NULL; 2682 } 2683 2684 /** 2685 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2686 * @shost: scsi host the remote port is connected to. 2687 * @channel: Channel on shost port connected to. 2688 * @ids: The world wide names, fc address, and FC4 port 2689 * roles for the remote port. 2690 * 2691 * The LLDD calls this routine to notify the transport of the existence 2692 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2693 * of the port, it's FC address (port_id), and the FC4 roles that are 2694 * active for the port. 2695 * 2696 * For ports that are FCP targets (aka scsi targets), the FC transport 2697 * maintains consistent target id bindings on behalf of the LLDD. 2698 * A consistent target id binding is an assignment of a target id to 2699 * a remote port identifier, which persists while the scsi host is 2700 * attached. The remote port can disappear, then later reappear, and 2701 * it's target id assignment remains the same. This allows for shifts 2702 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2703 * changes to the scsi subsystem which is based on scsi host number and 2704 * target id values. Bindings are only valid during the attachment of 2705 * the scsi host. If the host detaches, then later re-attaches, target 2706 * id bindings may change. 2707 * 2708 * This routine is responsible for returning a remote port structure. 2709 * The routine will search the list of remote ports it maintains 2710 * internally on behalf of consistent target id mappings. If found, the 2711 * remote port structure will be reused. Otherwise, a new remote port 2712 * structure will be allocated. 2713 * 2714 * Whenever a remote port is allocated, a new fc_remote_port class 2715 * device is created. 2716 * 2717 * Should not be called from interrupt context. 2718 * 2719 * Notes: 2720 * This routine assumes no locks are held on entry. 2721 */ 2722 struct fc_rport * 2723 fc_remote_port_add(struct Scsi_Host *shost, int channel, 2724 struct fc_rport_identifiers *ids) 2725 { 2726 struct fc_internal *fci = to_fc_internal(shost->transportt); 2727 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2728 struct fc_rport *rport; 2729 unsigned long flags; 2730 int match = 0; 2731 2732 /* ensure any stgt delete functions are done */ 2733 fc_flush_work(shost); 2734 2735 /* 2736 * Search the list of "active" rports, for an rport that has been 2737 * deleted, but we've held off the real delete while the target 2738 * is in a "blocked" state. 2739 */ 2740 spin_lock_irqsave(shost->host_lock, flags); 2741 2742 list_for_each_entry(rport, &fc_host->rports, peers) { 2743 2744 if ((rport->port_state == FC_PORTSTATE_BLOCKED || 2745 rport->port_state == FC_PORTSTATE_NOTPRESENT) && 2746 (rport->channel == channel)) { 2747 2748 switch (fc_host->tgtid_bind_type) { 2749 case FC_TGTID_BIND_BY_WWPN: 2750 case FC_TGTID_BIND_NONE: 2751 if (rport->port_name == ids->port_name) 2752 match = 1; 2753 break; 2754 case FC_TGTID_BIND_BY_WWNN: 2755 if (rport->node_name == ids->node_name) 2756 match = 1; 2757 break; 2758 case FC_TGTID_BIND_BY_ID: 2759 if (rport->port_id == ids->port_id) 2760 match = 1; 2761 break; 2762 } 2763 2764 if (match) { 2765 2766 memcpy(&rport->node_name, &ids->node_name, 2767 sizeof(rport->node_name)); 2768 memcpy(&rport->port_name, &ids->port_name, 2769 sizeof(rport->port_name)); 2770 rport->port_id = ids->port_id; 2771 2772 rport->port_state = FC_PORTSTATE_ONLINE; 2773 rport->roles = ids->roles; 2774 2775 spin_unlock_irqrestore(shost->host_lock, flags); 2776 2777 if (fci->f->dd_fcrport_size) 2778 memset(rport->dd_data, 0, 2779 fci->f->dd_fcrport_size); 2780 2781 /* 2782 * If we were not a target, cancel the 2783 * io terminate and rport timers, and 2784 * we're done. 2785 * 2786 * If we were a target, but our new role 2787 * doesn't indicate a target, leave the 2788 * timers running expecting the role to 2789 * change as the target fully logs in. If 2790 * it doesn't, the target will be torn down. 2791 * 2792 * If we were a target, and our role shows 2793 * we're still a target, cancel the timers 2794 * and kick off a scan. 2795 */ 2796 2797 /* was a target, not in roles */ 2798 if ((rport->scsi_target_id != -1) && 2799 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2800 return rport; 2801 2802 /* 2803 * Stop the fail io and dev_loss timers. 2804 * If they flush, the port_state will 2805 * be checked and will NOOP the function. 2806 */ 2807 if (!cancel_delayed_work(&rport->fail_io_work)) 2808 fc_flush_devloss(shost); 2809 if (!cancel_delayed_work(&rport->dev_loss_work)) 2810 fc_flush_devloss(shost); 2811 2812 spin_lock_irqsave(shost->host_lock, flags); 2813 2814 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2815 FC_RPORT_DEVLOSS_PENDING | 2816 FC_RPORT_DEVLOSS_CALLBK_DONE); 2817 2818 spin_unlock_irqrestore(shost->host_lock, flags); 2819 2820 /* if target, initiate a scan */ 2821 if (rport->scsi_target_id != -1) { 2822 scsi_target_unblock(&rport->dev, 2823 SDEV_RUNNING); 2824 spin_lock_irqsave(shost->host_lock, 2825 flags); 2826 rport->flags |= FC_RPORT_SCAN_PENDING; 2827 scsi_queue_work(shost, 2828 &rport->scan_work); 2829 spin_unlock_irqrestore(shost->host_lock, 2830 flags); 2831 } 2832 2833 fc_bsg_goose_queue(rport); 2834 2835 return rport; 2836 } 2837 } 2838 } 2839 2840 /* 2841 * Search the bindings array 2842 * Note: if never a FCP target, you won't be on this list 2843 */ 2844 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2845 2846 /* search for a matching consistent binding */ 2847 2848 list_for_each_entry(rport, &fc_host->rport_bindings, 2849 peers) { 2850 if (rport->channel != channel) 2851 continue; 2852 2853 switch (fc_host->tgtid_bind_type) { 2854 case FC_TGTID_BIND_BY_WWPN: 2855 if (rport->port_name == ids->port_name) 2856 match = 1; 2857 break; 2858 case FC_TGTID_BIND_BY_WWNN: 2859 if (rport->node_name == ids->node_name) 2860 match = 1; 2861 break; 2862 case FC_TGTID_BIND_BY_ID: 2863 if (rport->port_id == ids->port_id) 2864 match = 1; 2865 break; 2866 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2867 break; 2868 } 2869 2870 if (match) { 2871 list_move_tail(&rport->peers, &fc_host->rports); 2872 break; 2873 } 2874 } 2875 2876 if (match) { 2877 memcpy(&rport->node_name, &ids->node_name, 2878 sizeof(rport->node_name)); 2879 memcpy(&rport->port_name, &ids->port_name, 2880 sizeof(rport->port_name)); 2881 rport->port_id = ids->port_id; 2882 rport->port_state = FC_PORTSTATE_ONLINE; 2883 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2884 2885 if (fci->f->dd_fcrport_size) 2886 memset(rport->dd_data, 0, 2887 fci->f->dd_fcrport_size); 2888 spin_unlock_irqrestore(shost->host_lock, flags); 2889 2890 fc_remote_port_rolechg(rport, ids->roles); 2891 return rport; 2892 } 2893 } 2894 2895 spin_unlock_irqrestore(shost->host_lock, flags); 2896 2897 /* No consistent binding found - create new remote port entry */ 2898 rport = fc_remote_port_create(shost, channel, ids); 2899 2900 return rport; 2901 } 2902 EXPORT_SYMBOL(fc_remote_port_add); 2903 2904 2905 /** 2906 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2907 * @rport: The remote port that no longer exists 2908 * 2909 * The LLDD calls this routine to notify the transport that a remote 2910 * port is no longer part of the topology. Note: Although a port 2911 * may no longer be part of the topology, it may persist in the remote 2912 * ports displayed by the fc_host. We do this under 2 conditions: 2913 * 2914 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2915 * This allows the port to temporarily disappear, then reappear without 2916 * disrupting the SCSI device tree attached to it. During the "blocked" 2917 * period the port will still exist. 2918 * 2919 * 2) If the port was a scsi target and disappears for longer than we 2920 * expect, we'll delete the port and the tear down the SCSI device tree 2921 * attached to it. However, we want to semi-persist the target id assigned 2922 * to that port if it eventually does exist. The port structure will 2923 * remain (although with minimal information) so that the target id 2924 * bindings also remain. 2925 * 2926 * If the remote port is not an FCP Target, it will be fully torn down 2927 * and deallocated, including the fc_remote_port class device. 2928 * 2929 * If the remote port is an FCP Target, the port will be placed in a 2930 * temporary blocked state. From the LLDD's perspective, the rport no 2931 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2932 * exists, but all sdevs on it are blocked from further I/O. The following 2933 * is then expected. 2934 * 2935 * If the remote port does not return (signaled by a LLDD call to 2936 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2937 * scsi target is removed - killing all outstanding i/o and removing the 2938 * scsi devices attached to it. The port structure will be marked Not 2939 * Present and be partially cleared, leaving only enough information to 2940 * recognize the remote port relative to the scsi target id binding if 2941 * it later appears. The port will remain as long as there is a valid 2942 * binding (e.g. until the user changes the binding type or unloads the 2943 * scsi host with the binding). 2944 * 2945 * If the remote port returns within the dev_loss_tmo value (and matches 2946 * according to the target id binding type), the port structure will be 2947 * reused. If it is no longer a SCSI target, the target will be torn 2948 * down. If it continues to be a SCSI target, then the target will be 2949 * unblocked (allowing i/o to be resumed), and a scan will be activated 2950 * to ensure that all luns are detected. 2951 * 2952 * Called from normal process context only - cannot be called from interrupt. 2953 * 2954 * Notes: 2955 * This routine assumes no locks are held on entry. 2956 */ 2957 void 2958 fc_remote_port_delete(struct fc_rport *rport) 2959 { 2960 struct Scsi_Host *shost = rport_to_shost(rport); 2961 unsigned long timeout = rport->dev_loss_tmo; 2962 unsigned long flags; 2963 2964 /* 2965 * No need to flush the fc_host work_q's, as all adds are synchronous. 2966 * 2967 * We do need to reclaim the rport scan work element, so eventually 2968 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2969 * there's still a scan pending. 2970 */ 2971 2972 spin_lock_irqsave(shost->host_lock, flags); 2973 2974 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2975 spin_unlock_irqrestore(shost->host_lock, flags); 2976 return; 2977 } 2978 2979 /* 2980 * In the past, we if this was not an FCP-Target, we would 2981 * unconditionally just jump to deleting the rport. 2982 * However, rports can be used as node containers by the LLDD, 2983 * and its not appropriate to just terminate the rport at the 2984 * first sign of a loss in connectivity. The LLDD may want to 2985 * send ELS traffic to re-validate the login. If the rport is 2986 * immediately deleted, it makes it inappropriate for a node 2987 * container. 2988 * So... we now unconditionally wait dev_loss_tmo before 2989 * destroying an rport. 2990 */ 2991 2992 rport->port_state = FC_PORTSTATE_BLOCKED; 2993 2994 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 2995 2996 spin_unlock_irqrestore(shost->host_lock, flags); 2997 2998 scsi_target_block(&rport->dev); 2999 3000 /* see if we need to kill io faster than waiting for device loss */ 3001 if ((rport->fast_io_fail_tmo != -1) && 3002 (rport->fast_io_fail_tmo < timeout)) 3003 fc_queue_devloss_work(shost, &rport->fail_io_work, 3004 rport->fast_io_fail_tmo * HZ); 3005 3006 /* cap the length the devices can be blocked until they are deleted */ 3007 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3008 } 3009 EXPORT_SYMBOL(fc_remote_port_delete); 3010 3011 /** 3012 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3013 * @rport: The remote port that changed. 3014 * @roles: New roles for this port. 3015 * 3016 * Description: The LLDD calls this routine to notify the transport that the 3017 * roles on a remote port may have changed. The largest effect of this is 3018 * if a port now becomes a FCP Target, it must be allocated a 3019 * scsi target id. If the port is no longer a FCP target, any 3020 * scsi target id value assigned to it will persist in case the 3021 * role changes back to include FCP Target. No changes in the scsi 3022 * midlayer will be invoked if the role changes (in the expectation 3023 * that the role will be resumed. If it doesn't normal error processing 3024 * will take place). 3025 * 3026 * Should not be called from interrupt context. 3027 * 3028 * Notes: 3029 * This routine assumes no locks are held on entry. 3030 */ 3031 void 3032 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3033 { 3034 struct Scsi_Host *shost = rport_to_shost(rport); 3035 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3036 unsigned long flags; 3037 int create = 0; 3038 3039 spin_lock_irqsave(shost->host_lock, flags); 3040 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3041 if (rport->scsi_target_id == -1) { 3042 rport->scsi_target_id = fc_host->next_target_id++; 3043 create = 1; 3044 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3045 create = 1; 3046 } 3047 3048 rport->roles = roles; 3049 3050 spin_unlock_irqrestore(shost->host_lock, flags); 3051 3052 if (create) { 3053 /* 3054 * There may have been a delete timer running on the 3055 * port. Ensure that it is cancelled as we now know 3056 * the port is an FCP Target. 3057 * Note: we know the rport exists and is in an online 3058 * state as the LLDD would not have had an rport 3059 * reference to pass us. 3060 * 3061 * Take no action on the del_timer failure as the state 3062 * machine state change will validate the 3063 * transaction. 3064 */ 3065 if (!cancel_delayed_work(&rport->fail_io_work)) 3066 fc_flush_devloss(shost); 3067 if (!cancel_delayed_work(&rport->dev_loss_work)) 3068 fc_flush_devloss(shost); 3069 3070 spin_lock_irqsave(shost->host_lock, flags); 3071 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3072 FC_RPORT_DEVLOSS_PENDING | 3073 FC_RPORT_DEVLOSS_CALLBK_DONE); 3074 spin_unlock_irqrestore(shost->host_lock, flags); 3075 3076 /* ensure any stgt delete functions are done */ 3077 fc_flush_work(shost); 3078 3079 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3080 /* initiate a scan of the target */ 3081 spin_lock_irqsave(shost->host_lock, flags); 3082 rport->flags |= FC_RPORT_SCAN_PENDING; 3083 scsi_queue_work(shost, &rport->scan_work); 3084 spin_unlock_irqrestore(shost->host_lock, flags); 3085 } 3086 } 3087 EXPORT_SYMBOL(fc_remote_port_rolechg); 3088 3089 /** 3090 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3091 * @work: rport target that failed to reappear in the allotted time. 3092 * 3093 * Description: An attempt to delete a remote port blocks, and if it fails 3094 * to return in the allotted time this gets called. 3095 */ 3096 static void 3097 fc_timeout_deleted_rport(struct work_struct *work) 3098 { 3099 struct fc_rport *rport = 3100 container_of(work, struct fc_rport, dev_loss_work.work); 3101 struct Scsi_Host *shost = rport_to_shost(rport); 3102 struct fc_internal *i = to_fc_internal(shost->transportt); 3103 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3104 unsigned long flags; 3105 int do_callback = 0; 3106 3107 spin_lock_irqsave(shost->host_lock, flags); 3108 3109 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3110 3111 /* 3112 * If the port is ONLINE, then it came back. If it was a SCSI 3113 * target, validate it still is. If not, tear down the 3114 * scsi_target on it. 3115 */ 3116 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3117 (rport->scsi_target_id != -1) && 3118 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3119 dev_printk(KERN_ERR, &rport->dev, 3120 "blocked FC remote port time out: no longer" 3121 " a FCP target, removing starget\n"); 3122 spin_unlock_irqrestore(shost->host_lock, flags); 3123 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3124 fc_queue_work(shost, &rport->stgt_delete_work); 3125 return; 3126 } 3127 3128 /* NOOP state - we're flushing workq's */ 3129 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3130 spin_unlock_irqrestore(shost->host_lock, flags); 3131 dev_printk(KERN_ERR, &rport->dev, 3132 "blocked FC remote port time out: leaving" 3133 " rport%s alone\n", 3134 (rport->scsi_target_id != -1) ? " and starget" : ""); 3135 return; 3136 } 3137 3138 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3139 (rport->scsi_target_id == -1)) { 3140 list_del(&rport->peers); 3141 rport->port_state = FC_PORTSTATE_DELETED; 3142 dev_printk(KERN_ERR, &rport->dev, 3143 "blocked FC remote port time out: removing" 3144 " rport%s\n", 3145 (rport->scsi_target_id != -1) ? " and starget" : ""); 3146 fc_queue_work(shost, &rport->rport_delete_work); 3147 spin_unlock_irqrestore(shost->host_lock, flags); 3148 return; 3149 } 3150 3151 dev_printk(KERN_ERR, &rport->dev, 3152 "blocked FC remote port time out: removing target and " 3153 "saving binding\n"); 3154 3155 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3156 3157 /* 3158 * Note: We do not remove or clear the hostdata area. This allows 3159 * host-specific target data to persist along with the 3160 * scsi_target_id. It's up to the host to manage it's hostdata area. 3161 */ 3162 3163 /* 3164 * Reinitialize port attributes that may change if the port comes back. 3165 */ 3166 rport->maxframe_size = -1; 3167 rport->supported_classes = FC_COS_UNSPECIFIED; 3168 rport->roles = FC_PORT_ROLE_UNKNOWN; 3169 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3170 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3171 3172 /* 3173 * Pre-emptively kill I/O rather than waiting for the work queue 3174 * item to teardown the starget. (FCOE libFC folks prefer this 3175 * and to have the rport_port_id still set when it's done). 3176 */ 3177 spin_unlock_irqrestore(shost->host_lock, flags); 3178 fc_terminate_rport_io(rport); 3179 3180 spin_lock_irqsave(shost->host_lock, flags); 3181 3182 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3183 3184 /* remove the identifiers that aren't used in the consisting binding */ 3185 switch (fc_host->tgtid_bind_type) { 3186 case FC_TGTID_BIND_BY_WWPN: 3187 rport->node_name = -1; 3188 rport->port_id = -1; 3189 break; 3190 case FC_TGTID_BIND_BY_WWNN: 3191 rport->port_name = -1; 3192 rport->port_id = -1; 3193 break; 3194 case FC_TGTID_BIND_BY_ID: 3195 rport->node_name = -1; 3196 rport->port_name = -1; 3197 break; 3198 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3199 break; 3200 } 3201 3202 /* 3203 * As this only occurs if the remote port (scsi target) 3204 * went away and didn't come back - we'll remove 3205 * all attached scsi devices. 3206 */ 3207 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3208 fc_queue_work(shost, &rport->stgt_delete_work); 3209 3210 do_callback = 1; 3211 } 3212 3213 spin_unlock_irqrestore(shost->host_lock, flags); 3214 3215 /* 3216 * Notify the driver that the rport is now dead. The LLDD will 3217 * also guarantee that any communication to the rport is terminated 3218 * 3219 * Note: we set the CALLBK_DONE flag above to correspond 3220 */ 3221 if (do_callback && i->f->dev_loss_tmo_callbk) 3222 i->f->dev_loss_tmo_callbk(rport); 3223 } 3224 3225 3226 /** 3227 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3228 * @work: rport to terminate io on. 3229 * 3230 * Notes: Only requests the failure of the io, not that all are flushed 3231 * prior to returning. 3232 */ 3233 static void 3234 fc_timeout_fail_rport_io(struct work_struct *work) 3235 { 3236 struct fc_rport *rport = 3237 container_of(work, struct fc_rport, fail_io_work.work); 3238 3239 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3240 return; 3241 3242 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3243 fc_terminate_rport_io(rport); 3244 } 3245 3246 /** 3247 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3248 * @work: remote port to be scanned. 3249 */ 3250 static void 3251 fc_scsi_scan_rport(struct work_struct *work) 3252 { 3253 struct fc_rport *rport = 3254 container_of(work, struct fc_rport, scan_work); 3255 struct Scsi_Host *shost = rport_to_shost(rport); 3256 struct fc_internal *i = to_fc_internal(shost->transportt); 3257 unsigned long flags; 3258 3259 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3260 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3261 !(i->f->disable_target_scan)) { 3262 scsi_scan_target(&rport->dev, rport->channel, 3263 rport->scsi_target_id, SCAN_WILD_CARD, 3264 SCSI_SCAN_RESCAN); 3265 } 3266 3267 spin_lock_irqsave(shost->host_lock, flags); 3268 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3269 spin_unlock_irqrestore(shost->host_lock, flags); 3270 } 3271 3272 /** 3273 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport. 3274 * @rport: Remote port that scsi_eh is trying to recover. 3275 * 3276 * This routine can be called from a FC LLD scsi_eh callback. It 3277 * blocks the scsi_eh thread until the fc_rport leaves the 3278 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3279 * necessary to avoid the scsi_eh failing recovery actions for blocked 3280 * rports which would lead to offlined SCSI devices. 3281 * 3282 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3283 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3284 * passed back to scsi_eh. 3285 */ 3286 int fc_block_rport(struct fc_rport *rport) 3287 { 3288 struct Scsi_Host *shost = rport_to_shost(rport); 3289 unsigned long flags; 3290 3291 spin_lock_irqsave(shost->host_lock, flags); 3292 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3293 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3294 spin_unlock_irqrestore(shost->host_lock, flags); 3295 msleep(1000); 3296 spin_lock_irqsave(shost->host_lock, flags); 3297 } 3298 spin_unlock_irqrestore(shost->host_lock, flags); 3299 3300 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3301 return FAST_IO_FAIL; 3302 3303 return 0; 3304 } 3305 EXPORT_SYMBOL(fc_block_rport); 3306 3307 /** 3308 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3309 * @cmnd: SCSI command that scsi_eh is trying to recover 3310 * 3311 * This routine can be called from a FC LLD scsi_eh callback. It 3312 * blocks the scsi_eh thread until the fc_rport leaves the 3313 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3314 * necessary to avoid the scsi_eh failing recovery actions for blocked 3315 * rports which would lead to offlined SCSI devices. 3316 * 3317 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3318 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3319 * passed back to scsi_eh. 3320 */ 3321 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3322 { 3323 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3324 3325 if (WARN_ON_ONCE(!rport)) 3326 return FAST_IO_FAIL; 3327 3328 return fc_block_rport(rport); 3329 } 3330 EXPORT_SYMBOL(fc_block_scsi_eh); 3331 3332 /** 3333 * fc_vport_setup - allocates and creates a FC virtual port. 3334 * @shost: scsi host the virtual port is connected to. 3335 * @channel: Channel on shost port connected to. 3336 * @pdev: parent device for vport 3337 * @ids: The world wide names, FC4 port roles, etc for 3338 * the virtual port. 3339 * @ret_vport: The pointer to the created vport. 3340 * 3341 * Allocates and creates the vport structure, calls the parent host 3342 * to instantiate the vport, this completes w/ class and sysfs creation. 3343 * 3344 * Notes: 3345 * This routine assumes no locks are held on entry. 3346 */ 3347 static int 3348 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3349 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3350 { 3351 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3352 struct fc_internal *fci = to_fc_internal(shost->transportt); 3353 struct fc_vport *vport; 3354 struct device *dev; 3355 unsigned long flags; 3356 size_t size; 3357 int error; 3358 3359 *ret_vport = NULL; 3360 3361 if ( ! fci->f->vport_create) 3362 return -ENOENT; 3363 3364 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3365 vport = kzalloc(size, GFP_KERNEL); 3366 if (unlikely(!vport)) { 3367 printk(KERN_ERR "%s: allocation failure\n", __func__); 3368 return -ENOMEM; 3369 } 3370 3371 vport->vport_state = FC_VPORT_UNKNOWN; 3372 vport->vport_last_state = FC_VPORT_UNKNOWN; 3373 vport->node_name = ids->node_name; 3374 vport->port_name = ids->port_name; 3375 vport->roles = ids->roles; 3376 vport->vport_type = ids->vport_type; 3377 if (fci->f->dd_fcvport_size) 3378 vport->dd_data = &vport[1]; 3379 vport->shost = shost; 3380 vport->channel = channel; 3381 vport->flags = FC_VPORT_CREATING; 3382 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3383 3384 spin_lock_irqsave(shost->host_lock, flags); 3385 3386 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3387 spin_unlock_irqrestore(shost->host_lock, flags); 3388 kfree(vport); 3389 return -ENOSPC; 3390 } 3391 fc_host->npiv_vports_inuse++; 3392 vport->number = fc_host->next_vport_number++; 3393 list_add_tail(&vport->peers, &fc_host->vports); 3394 scsi_host_get(shost); /* for fc_host->vport list */ 3395 3396 spin_unlock_irqrestore(shost->host_lock, flags); 3397 3398 dev = &vport->dev; 3399 device_initialize(dev); /* takes self reference */ 3400 dev->parent = get_device(pdev); /* takes parent reference */ 3401 dev->release = fc_vport_dev_release; 3402 dev_set_name(dev, "vport-%d:%d-%d", 3403 shost->host_no, channel, vport->number); 3404 transport_setup_device(dev); 3405 3406 error = device_add(dev); 3407 if (error) { 3408 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3409 goto delete_vport; 3410 } 3411 transport_add_device(dev); 3412 transport_configure_device(dev); 3413 3414 error = fci->f->vport_create(vport, ids->disable); 3415 if (error) { 3416 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3417 goto delete_vport_all; 3418 } 3419 3420 /* 3421 * if the parent isn't the physical adapter's Scsi_Host, ensure 3422 * the Scsi_Host at least contains a symlink to the vport. 3423 */ 3424 if (pdev != &shost->shost_gendev) { 3425 error = sysfs_create_link(&shost->shost_gendev.kobj, 3426 &dev->kobj, dev_name(dev)); 3427 if (error) 3428 printk(KERN_ERR 3429 "%s: Cannot create vport symlinks for " 3430 "%s, err=%d\n", 3431 __func__, dev_name(dev), error); 3432 } 3433 spin_lock_irqsave(shost->host_lock, flags); 3434 vport->flags &= ~FC_VPORT_CREATING; 3435 spin_unlock_irqrestore(shost->host_lock, flags); 3436 3437 dev_printk(KERN_NOTICE, pdev, 3438 "%s created via shost%d channel %d\n", dev_name(dev), 3439 shost->host_no, channel); 3440 3441 *ret_vport = vport; 3442 3443 return 0; 3444 3445 delete_vport_all: 3446 transport_remove_device(dev); 3447 device_del(dev); 3448 delete_vport: 3449 transport_destroy_device(dev); 3450 spin_lock_irqsave(shost->host_lock, flags); 3451 list_del(&vport->peers); 3452 scsi_host_put(shost); /* for fc_host->vport list */ 3453 fc_host->npiv_vports_inuse--; 3454 spin_unlock_irqrestore(shost->host_lock, flags); 3455 put_device(dev->parent); 3456 kfree(vport); 3457 3458 return error; 3459 } 3460 3461 /** 3462 * fc_vport_create - Admin App or LLDD requests creation of a vport 3463 * @shost: scsi host the virtual port is connected to. 3464 * @channel: channel on shost port connected to. 3465 * @ids: The world wide names, FC4 port roles, etc for 3466 * the virtual port. 3467 * 3468 * Notes: 3469 * This routine assumes no locks are held on entry. 3470 */ 3471 struct fc_vport * 3472 fc_vport_create(struct Scsi_Host *shost, int channel, 3473 struct fc_vport_identifiers *ids) 3474 { 3475 int stat; 3476 struct fc_vport *vport; 3477 3478 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3479 ids, &vport); 3480 return stat ? NULL : vport; 3481 } 3482 EXPORT_SYMBOL(fc_vport_create); 3483 3484 /** 3485 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3486 * @vport: fc_vport to be terminated 3487 * 3488 * Calls the LLDD vport_delete() function, then deallocates and removes 3489 * the vport from the shost and object tree. 3490 * 3491 * Notes: 3492 * This routine assumes no locks are held on entry. 3493 */ 3494 int 3495 fc_vport_terminate(struct fc_vport *vport) 3496 { 3497 struct Scsi_Host *shost = vport_to_shost(vport); 3498 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3499 struct fc_internal *i = to_fc_internal(shost->transportt); 3500 struct device *dev = &vport->dev; 3501 unsigned long flags; 3502 int stat; 3503 3504 if (i->f->vport_delete) 3505 stat = i->f->vport_delete(vport); 3506 else 3507 stat = -ENOENT; 3508 3509 spin_lock_irqsave(shost->host_lock, flags); 3510 vport->flags &= ~FC_VPORT_DELETING; 3511 if (!stat) { 3512 vport->flags |= FC_VPORT_DELETED; 3513 list_del(&vport->peers); 3514 fc_host->npiv_vports_inuse--; 3515 scsi_host_put(shost); /* for fc_host->vport list */ 3516 } 3517 spin_unlock_irqrestore(shost->host_lock, flags); 3518 3519 if (stat) 3520 return stat; 3521 3522 if (dev->parent != &shost->shost_gendev) 3523 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3524 transport_remove_device(dev); 3525 device_del(dev); 3526 transport_destroy_device(dev); 3527 3528 /* 3529 * Removing our self-reference should mean our 3530 * release function gets called, which will drop the remaining 3531 * parent reference and free the data structure. 3532 */ 3533 put_device(dev); /* for self-reference */ 3534 3535 return 0; /* SUCCESS */ 3536 } 3537 EXPORT_SYMBOL(fc_vport_terminate); 3538 3539 /** 3540 * fc_vport_sched_delete - workq-based delete request for a vport 3541 * @work: vport to be deleted. 3542 */ 3543 static void 3544 fc_vport_sched_delete(struct work_struct *work) 3545 { 3546 struct fc_vport *vport = 3547 container_of(work, struct fc_vport, vport_delete_work); 3548 int stat; 3549 3550 stat = fc_vport_terminate(vport); 3551 if (stat) 3552 dev_printk(KERN_ERR, vport->dev.parent, 3553 "%s: %s could not be deleted created via " 3554 "shost%d channel %d - error %d\n", __func__, 3555 dev_name(&vport->dev), vport->shost->host_no, 3556 vport->channel, stat); 3557 } 3558 3559 3560 /* 3561 * BSG support 3562 */ 3563 3564 /** 3565 * fc_bsg_job_timeout - handler for when a bsg request timesout 3566 * @req: request that timed out 3567 */ 3568 static enum blk_eh_timer_return 3569 fc_bsg_job_timeout(struct request *req) 3570 { 3571 struct bsg_job *job = blk_mq_rq_to_pdu(req); 3572 struct Scsi_Host *shost = fc_bsg_to_shost(job); 3573 struct fc_rport *rport = fc_bsg_to_rport(job); 3574 struct fc_internal *i = to_fc_internal(shost->transportt); 3575 int err = 0, inflight = 0; 3576 3577 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) 3578 return BLK_EH_RESET_TIMER; 3579 3580 inflight = bsg_job_get(job); 3581 3582 if (inflight && i->f->bsg_timeout) { 3583 /* call LLDD to abort the i/o as it has timed out */ 3584 err = i->f->bsg_timeout(job); 3585 if (err == -EAGAIN) { 3586 bsg_job_put(job); 3587 return BLK_EH_RESET_TIMER; 3588 } else if (err) 3589 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3590 "abort failed with status %d\n", err); 3591 } 3592 3593 /* the blk_end_sync_io() doesn't check the error */ 3594 if (inflight) 3595 __blk_complete_request(req); 3596 return BLK_EH_DONE; 3597 } 3598 3599 /** 3600 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3601 * @shost: scsi host rport attached to 3602 * @job: bsg job to be processed 3603 */ 3604 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 3605 { 3606 struct fc_internal *i = to_fc_internal(shost->transportt); 3607 struct fc_bsg_request *bsg_request = job->request; 3608 struct fc_bsg_reply *bsg_reply = job->reply; 3609 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3610 int ret; 3611 3612 /* check if we really have all the request data needed */ 3613 if (job->request_len < cmdlen) { 3614 ret = -ENOMSG; 3615 goto fail_host_msg; 3616 } 3617 3618 /* Validate the host command */ 3619 switch (bsg_request->msgcode) { 3620 case FC_BSG_HST_ADD_RPORT: 3621 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3622 break; 3623 3624 case FC_BSG_HST_DEL_RPORT: 3625 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3626 break; 3627 3628 case FC_BSG_HST_ELS_NOLOGIN: 3629 cmdlen += sizeof(struct fc_bsg_host_els); 3630 /* there better be a xmt and rcv payloads */ 3631 if ((!job->request_payload.payload_len) || 3632 (!job->reply_payload.payload_len)) { 3633 ret = -EINVAL; 3634 goto fail_host_msg; 3635 } 3636 break; 3637 3638 case FC_BSG_HST_CT: 3639 cmdlen += sizeof(struct fc_bsg_host_ct); 3640 /* there better be xmt and rcv payloads */ 3641 if ((!job->request_payload.payload_len) || 3642 (!job->reply_payload.payload_len)) { 3643 ret = -EINVAL; 3644 goto fail_host_msg; 3645 } 3646 break; 3647 3648 case FC_BSG_HST_VENDOR: 3649 cmdlen += sizeof(struct fc_bsg_host_vendor); 3650 if ((shost->hostt->vendor_id == 0L) || 3651 (bsg_request->rqst_data.h_vendor.vendor_id != 3652 shost->hostt->vendor_id)) { 3653 ret = -ESRCH; 3654 goto fail_host_msg; 3655 } 3656 break; 3657 3658 default: 3659 ret = -EBADR; 3660 goto fail_host_msg; 3661 } 3662 3663 ret = i->f->bsg_request(job); 3664 if (!ret) 3665 return 0; 3666 3667 fail_host_msg: 3668 /* return the errno failure code as the only status */ 3669 BUG_ON(job->reply_len < sizeof(uint32_t)); 3670 bsg_reply->reply_payload_rcv_len = 0; 3671 bsg_reply->result = ret; 3672 job->reply_len = sizeof(uint32_t); 3673 bsg_job_done(job, bsg_reply->result, 3674 bsg_reply->reply_payload_rcv_len); 3675 return 0; 3676 } 3677 3678 3679 /* 3680 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3681 * @rport: rport to be restarted 3682 */ 3683 static void 3684 fc_bsg_goose_queue(struct fc_rport *rport) 3685 { 3686 struct request_queue *q = rport->rqst_q; 3687 unsigned long flags; 3688 3689 if (!q) 3690 return; 3691 3692 spin_lock_irqsave(q->queue_lock, flags); 3693 blk_run_queue_async(q); 3694 spin_unlock_irqrestore(q->queue_lock, flags); 3695 } 3696 3697 /** 3698 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3699 * @shost: scsi host rport attached to 3700 * @job: bsg job to be processed 3701 */ 3702 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 3703 { 3704 struct fc_internal *i = to_fc_internal(shost->transportt); 3705 struct fc_bsg_request *bsg_request = job->request; 3706 struct fc_bsg_reply *bsg_reply = job->reply; 3707 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3708 int ret; 3709 3710 /* check if we really have all the request data needed */ 3711 if (job->request_len < cmdlen) { 3712 ret = -ENOMSG; 3713 goto fail_rport_msg; 3714 } 3715 3716 /* Validate the rport command */ 3717 switch (bsg_request->msgcode) { 3718 case FC_BSG_RPT_ELS: 3719 cmdlen += sizeof(struct fc_bsg_rport_els); 3720 goto check_bidi; 3721 3722 case FC_BSG_RPT_CT: 3723 cmdlen += sizeof(struct fc_bsg_rport_ct); 3724 check_bidi: 3725 /* there better be xmt and rcv payloads */ 3726 if ((!job->request_payload.payload_len) || 3727 (!job->reply_payload.payload_len)) { 3728 ret = -EINVAL; 3729 goto fail_rport_msg; 3730 } 3731 break; 3732 default: 3733 ret = -EBADR; 3734 goto fail_rport_msg; 3735 } 3736 3737 ret = i->f->bsg_request(job); 3738 if (!ret) 3739 return 0; 3740 3741 fail_rport_msg: 3742 /* return the errno failure code as the only status */ 3743 BUG_ON(job->reply_len < sizeof(uint32_t)); 3744 bsg_reply->reply_payload_rcv_len = 0; 3745 bsg_reply->result = ret; 3746 job->reply_len = sizeof(uint32_t); 3747 bsg_job_done(job, bsg_reply->result, 3748 bsg_reply->reply_payload_rcv_len); 3749 return 0; 3750 } 3751 3752 static int fc_bsg_dispatch(struct bsg_job *job) 3753 { 3754 struct Scsi_Host *shost = fc_bsg_to_shost(job); 3755 3756 if (scsi_is_fc_rport(job->dev)) 3757 return fc_bsg_rport_dispatch(shost, job); 3758 else 3759 return fc_bsg_host_dispatch(shost, job); 3760 } 3761 3762 /** 3763 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 3764 * @shost: shost for fc_host 3765 * @fc_host: fc_host adding the structures to 3766 */ 3767 static int 3768 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 3769 { 3770 struct device *dev = &shost->shost_gendev; 3771 struct fc_internal *i = to_fc_internal(shost->transportt); 3772 struct request_queue *q; 3773 char bsg_name[20]; 3774 3775 fc_host->rqst_q = NULL; 3776 3777 if (!i->f->bsg_request) 3778 return -ENOTSUPP; 3779 3780 snprintf(bsg_name, sizeof(bsg_name), 3781 "fc_host%d", shost->host_no); 3782 3783 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, i->f->dd_bsg_size); 3784 if (IS_ERR(q)) { 3785 dev_err(dev, 3786 "fc_host%d: bsg interface failed to initialize - setup queue\n", 3787 shost->host_no); 3788 return PTR_ERR(q); 3789 } 3790 __scsi_init_queue(shost, q); 3791 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 3792 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 3793 fc_host->rqst_q = q; 3794 return 0; 3795 } 3796 3797 static int fc_bsg_rport_prep(struct request_queue *q, struct request *req) 3798 { 3799 struct fc_rport *rport = dev_to_rport(q->queuedata); 3800 3801 if (rport->port_state == FC_PORTSTATE_BLOCKED && 3802 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3803 return BLKPREP_DEFER; 3804 3805 if (rport->port_state != FC_PORTSTATE_ONLINE) 3806 return BLKPREP_KILL; 3807 3808 return BLKPREP_OK; 3809 } 3810 3811 /** 3812 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 3813 * @shost: shost that rport is attached to 3814 * @rport: rport that the bsg hooks are being attached to 3815 */ 3816 static int 3817 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 3818 { 3819 struct device *dev = &rport->dev; 3820 struct fc_internal *i = to_fc_internal(shost->transportt); 3821 struct request_queue *q; 3822 3823 rport->rqst_q = NULL; 3824 3825 if (!i->f->bsg_request) 3826 return -ENOTSUPP; 3827 3828 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch, 3829 i->f->dd_bsg_size); 3830 if (IS_ERR(q)) { 3831 dev_err(dev, "failed to setup bsg queue\n"); 3832 return PTR_ERR(q); 3833 } 3834 __scsi_init_queue(shost, q); 3835 blk_queue_prep_rq(q, fc_bsg_rport_prep); 3836 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 3837 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 3838 rport->rqst_q = q; 3839 return 0; 3840 } 3841 3842 3843 /** 3844 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 3845 * @q: the request_queue that is to be torn down. 3846 * 3847 * Notes: 3848 * Before unregistering the queue empty any requests that are blocked 3849 * 3850 * 3851 */ 3852 static void 3853 fc_bsg_remove(struct request_queue *q) 3854 { 3855 if (q) { 3856 bsg_unregister_queue(q); 3857 blk_cleanup_queue(q); 3858 } 3859 } 3860 3861 3862 /* Original Author: Martin Hicks */ 3863 MODULE_AUTHOR("James Smart"); 3864 MODULE_DESCRIPTION("FC Transport Attributes"); 3865 MODULE_LICENSE("GPL"); 3866 3867 module_init(fc_transport_init); 3868 module_exit(fc_transport_exit); 3869