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_NOT_NEGOTIATED, "Not Negotiated" }, 271 }; 272 fc_bitfield_name_search(port_speed, fc_port_speed_names) 273 274 275 static int 276 show_fc_fc4s (char *buf, u8 *fc4_list) 277 { 278 int i, len=0; 279 280 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 281 len += sprintf(buf + len , "0x%02x ", *fc4_list); 282 len += sprintf(buf + len, "\n"); 283 return len; 284 } 285 286 287 /* Convert FC_PORT_ROLE bit values to ascii string name */ 288 static const struct { 289 u32 value; 290 char *name; 291 } fc_port_role_names[] = { 292 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 293 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 294 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 295 }; 296 fc_bitfield_name_search(port_roles, fc_port_role_names) 297 298 /* 299 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 300 */ 301 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 302 #define FC_WELLKNOWN_ROLE_MASK 0x00000f 303 #define FC_FPORT_PORTID 0x00000e 304 #define FC_FABCTLR_PORTID 0x00000d 305 #define FC_DIRSRVR_PORTID 0x00000c 306 #define FC_TIMESRVR_PORTID 0x00000b 307 #define FC_MGMTSRVR_PORTID 0x00000a 308 309 310 static void fc_timeout_deleted_rport(struct work_struct *work); 311 static void fc_timeout_fail_rport_io(struct work_struct *work); 312 static void fc_scsi_scan_rport(struct work_struct *work); 313 314 /* 315 * Attribute counts pre object type... 316 * Increase these values if you add attributes 317 */ 318 #define FC_STARGET_NUM_ATTRS 3 319 #define FC_RPORT_NUM_ATTRS 10 320 #define FC_VPORT_NUM_ATTRS 9 321 #define FC_HOST_NUM_ATTRS 29 322 323 struct fc_internal { 324 struct scsi_transport_template t; 325 struct fc_function_template *f; 326 327 /* 328 * For attributes : each object has : 329 * An array of the actual attributes structures 330 * An array of null-terminated pointers to the attribute 331 * structures - used for mid-layer interaction. 332 * 333 * The attribute containers for the starget and host are are 334 * part of the midlayer. As the remote port is specific to the 335 * fc transport, we must provide the attribute container. 336 */ 337 struct device_attribute private_starget_attrs[ 338 FC_STARGET_NUM_ATTRS]; 339 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 340 341 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 342 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 343 344 struct transport_container rport_attr_cont; 345 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 346 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 347 348 struct transport_container vport_attr_cont; 349 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 350 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 351 }; 352 353 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 354 355 static int fc_target_setup(struct transport_container *tc, struct device *dev, 356 struct device *cdev) 357 { 358 struct scsi_target *starget = to_scsi_target(dev); 359 struct fc_rport *rport = starget_to_rport(starget); 360 361 /* 362 * if parent is remote port, use values from remote port. 363 * Otherwise, this host uses the fc_transport, but not the 364 * remote port interface. As such, initialize to known non-values. 365 */ 366 if (rport) { 367 fc_starget_node_name(starget) = rport->node_name; 368 fc_starget_port_name(starget) = rport->port_name; 369 fc_starget_port_id(starget) = rport->port_id; 370 } else { 371 fc_starget_node_name(starget) = -1; 372 fc_starget_port_name(starget) = -1; 373 fc_starget_port_id(starget) = -1; 374 } 375 376 return 0; 377 } 378 379 static DECLARE_TRANSPORT_CLASS(fc_transport_class, 380 "fc_transport", 381 fc_target_setup, 382 NULL, 383 NULL); 384 385 static int fc_host_setup(struct transport_container *tc, struct device *dev, 386 struct device *cdev) 387 { 388 struct Scsi_Host *shost = dev_to_shost(dev); 389 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 390 391 /* 392 * Set default values easily detected by the midlayer as 393 * failure cases. The scsi lldd is responsible for initializing 394 * all transport attributes to valid values per host. 395 */ 396 fc_host->node_name = -1; 397 fc_host->port_name = -1; 398 fc_host->permanent_port_name = -1; 399 fc_host->supported_classes = FC_COS_UNSPECIFIED; 400 memset(fc_host->supported_fc4s, 0, 401 sizeof(fc_host->supported_fc4s)); 402 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 403 fc_host->maxframe_size = -1; 404 fc_host->max_npiv_vports = 0; 405 memset(fc_host->serial_number, 0, 406 sizeof(fc_host->serial_number)); 407 memset(fc_host->manufacturer, 0, 408 sizeof(fc_host->manufacturer)); 409 memset(fc_host->model, 0, 410 sizeof(fc_host->model)); 411 memset(fc_host->model_description, 0, 412 sizeof(fc_host->model_description)); 413 memset(fc_host->hardware_version, 0, 414 sizeof(fc_host->hardware_version)); 415 memset(fc_host->driver_version, 0, 416 sizeof(fc_host->driver_version)); 417 memset(fc_host->firmware_version, 0, 418 sizeof(fc_host->firmware_version)); 419 memset(fc_host->optionrom_version, 0, 420 sizeof(fc_host->optionrom_version)); 421 422 fc_host->port_id = -1; 423 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 424 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 425 memset(fc_host->active_fc4s, 0, 426 sizeof(fc_host->active_fc4s)); 427 fc_host->speed = FC_PORTSPEED_UNKNOWN; 428 fc_host->fabric_name = -1; 429 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 430 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 431 432 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 433 434 INIT_LIST_HEAD(&fc_host->rports); 435 INIT_LIST_HEAD(&fc_host->rport_bindings); 436 INIT_LIST_HEAD(&fc_host->vports); 437 fc_host->next_rport_number = 0; 438 fc_host->next_target_id = 0; 439 fc_host->next_vport_number = 0; 440 fc_host->npiv_vports_inuse = 0; 441 442 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 443 "fc_wq_%d", shost->host_no); 444 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); 445 if (!fc_host->work_q) 446 return -ENOMEM; 447 448 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 449 snprintf(fc_host->devloss_work_q_name, 450 sizeof(fc_host->devloss_work_q_name), 451 "fc_dl_%d", shost->host_no); 452 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, 453 fc_host->devloss_work_q_name); 454 if (!fc_host->devloss_work_q) { 455 destroy_workqueue(fc_host->work_q); 456 fc_host->work_q = NULL; 457 return -ENOMEM; 458 } 459 460 fc_bsg_hostadd(shost, fc_host); 461 /* ignore any bsg add error - we just can't do sgio */ 462 463 return 0; 464 } 465 466 static int fc_host_remove(struct transport_container *tc, struct device *dev, 467 struct device *cdev) 468 { 469 struct Scsi_Host *shost = dev_to_shost(dev); 470 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 471 472 fc_bsg_remove(fc_host->rqst_q); 473 return 0; 474 } 475 476 static DECLARE_TRANSPORT_CLASS(fc_host_class, 477 "fc_host", 478 fc_host_setup, 479 fc_host_remove, 480 NULL); 481 482 /* 483 * Setup and Remove actions for remote ports are handled 484 * in the service functions below. 485 */ 486 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 487 "fc_remote_ports", 488 NULL, 489 NULL, 490 NULL); 491 492 /* 493 * Setup and Remove actions for virtual ports are handled 494 * in the service functions below. 495 */ 496 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 497 "fc_vports", 498 NULL, 499 NULL, 500 NULL); 501 502 /* 503 * Netlink Infrastructure 504 */ 505 506 static atomic_t fc_event_seq; 507 508 /** 509 * fc_get_event_number - Obtain the next sequential FC event number 510 * 511 * Notes: 512 * We could have inlined this, but it would have required fc_event_seq to 513 * be exposed. For now, live with the subroutine call. 514 * Atomic used to avoid lock/unlock... 515 */ 516 u32 517 fc_get_event_number(void) 518 { 519 return atomic_add_return(1, &fc_event_seq); 520 } 521 EXPORT_SYMBOL(fc_get_event_number); 522 523 524 /** 525 * fc_host_post_event - called to post an even on an fc_host. 526 * @shost: host the event occurred on 527 * @event_number: fc event number obtained from get_fc_event_number() 528 * @event_code: fc_host event being posted 529 * @event_data: 32bits of data for the event being posted 530 * 531 * Notes: 532 * This routine assumes no locks are held on entry. 533 */ 534 void 535 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 536 enum fc_host_event_code event_code, u32 event_data) 537 { 538 struct sk_buff *skb; 539 struct nlmsghdr *nlh; 540 struct fc_nl_event *event; 541 const char *name; 542 u32 len; 543 int err; 544 545 if (!scsi_nl_sock) { 546 err = -ENOENT; 547 goto send_fail; 548 } 549 550 len = FC_NL_MSGALIGN(sizeof(*event)); 551 552 skb = nlmsg_new(len, GFP_KERNEL); 553 if (!skb) { 554 err = -ENOBUFS; 555 goto send_fail; 556 } 557 558 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 559 if (!nlh) { 560 err = -ENOBUFS; 561 goto send_fail_skb; 562 } 563 event = nlmsg_data(nlh); 564 565 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 566 FC_NL_ASYNC_EVENT, len); 567 event->seconds = get_seconds(); 568 event->vendor_id = 0; 569 event->host_no = shost->host_no; 570 event->event_datalen = sizeof(u32); /* bytes */ 571 event->event_num = event_number; 572 event->event_code = event_code; 573 event->event_data = event_data; 574 575 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 576 GFP_KERNEL); 577 return; 578 579 send_fail_skb: 580 kfree_skb(skb); 581 send_fail: 582 name = get_fc_host_event_code_name(event_code); 583 printk(KERN_WARNING 584 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 585 __func__, shost->host_no, 586 (name) ? name : "<unknown>", event_data, err); 587 return; 588 } 589 EXPORT_SYMBOL(fc_host_post_event); 590 591 592 /** 593 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host 594 * @shost: host the event occurred on 595 * @event_number: fc event number obtained from get_fc_event_number() 596 * @data_len: amount, in bytes, of vendor unique data 597 * @data_buf: pointer to vendor unique data 598 * @vendor_id: Vendor id 599 * 600 * Notes: 601 * This routine assumes no locks are held on entry. 602 */ 603 void 604 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 605 u32 data_len, char * data_buf, u64 vendor_id) 606 { 607 struct sk_buff *skb; 608 struct nlmsghdr *nlh; 609 struct fc_nl_event *event; 610 u32 len; 611 int err; 612 613 if (!scsi_nl_sock) { 614 err = -ENOENT; 615 goto send_vendor_fail; 616 } 617 618 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 619 620 skb = nlmsg_new(len, GFP_KERNEL); 621 if (!skb) { 622 err = -ENOBUFS; 623 goto send_vendor_fail; 624 } 625 626 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 627 if (!nlh) { 628 err = -ENOBUFS; 629 goto send_vendor_fail_skb; 630 } 631 event = nlmsg_data(nlh); 632 633 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 634 FC_NL_ASYNC_EVENT, len); 635 event->seconds = get_seconds(); 636 event->vendor_id = vendor_id; 637 event->host_no = shost->host_no; 638 event->event_datalen = data_len; /* bytes */ 639 event->event_num = event_number; 640 event->event_code = FCH_EVT_VENDOR_UNIQUE; 641 memcpy(&event->event_data, data_buf, data_len); 642 643 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 644 GFP_KERNEL); 645 return; 646 647 send_vendor_fail_skb: 648 kfree_skb(skb); 649 send_vendor_fail: 650 printk(KERN_WARNING 651 "%s: Dropped Event : host %d vendor_unique - err %d\n", 652 __func__, shost->host_no, err); 653 return; 654 } 655 EXPORT_SYMBOL(fc_host_post_vendor_event); 656 657 658 659 static __init int fc_transport_init(void) 660 { 661 int error; 662 663 atomic_set(&fc_event_seq, 0); 664 665 error = transport_class_register(&fc_host_class); 666 if (error) 667 return error; 668 error = transport_class_register(&fc_vport_class); 669 if (error) 670 goto unreg_host_class; 671 error = transport_class_register(&fc_rport_class); 672 if (error) 673 goto unreg_vport_class; 674 error = transport_class_register(&fc_transport_class); 675 if (error) 676 goto unreg_rport_class; 677 return 0; 678 679 unreg_rport_class: 680 transport_class_unregister(&fc_rport_class); 681 unreg_vport_class: 682 transport_class_unregister(&fc_vport_class); 683 unreg_host_class: 684 transport_class_unregister(&fc_host_class); 685 return error; 686 } 687 688 static void __exit fc_transport_exit(void) 689 { 690 transport_class_unregister(&fc_transport_class); 691 transport_class_unregister(&fc_rport_class); 692 transport_class_unregister(&fc_host_class); 693 transport_class_unregister(&fc_vport_class); 694 } 695 696 /* 697 * FC Remote Port Attribute Management 698 */ 699 700 #define fc_rport_show_function(field, format_string, sz, cast) \ 701 static ssize_t \ 702 show_fc_rport_##field (struct device *dev, \ 703 struct device_attribute *attr, char *buf) \ 704 { \ 705 struct fc_rport *rport = transport_class_to_rport(dev); \ 706 struct Scsi_Host *shost = rport_to_shost(rport); \ 707 struct fc_internal *i = to_fc_internal(shost->transportt); \ 708 if ((i->f->get_rport_##field) && \ 709 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 710 (rport->port_state == FC_PORTSTATE_DELETED) || \ 711 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 712 i->f->get_rport_##field(rport); \ 713 return snprintf(buf, sz, format_string, cast rport->field); \ 714 } 715 716 #define fc_rport_store_function(field) \ 717 static ssize_t \ 718 store_fc_rport_##field(struct device *dev, \ 719 struct device_attribute *attr, \ 720 const char *buf, size_t count) \ 721 { \ 722 int val; \ 723 struct fc_rport *rport = transport_class_to_rport(dev); \ 724 struct Scsi_Host *shost = rport_to_shost(rport); \ 725 struct fc_internal *i = to_fc_internal(shost->transportt); \ 726 char *cp; \ 727 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 728 (rport->port_state == FC_PORTSTATE_DELETED) || \ 729 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 730 return -EBUSY; \ 731 val = simple_strtoul(buf, &cp, 0); \ 732 if (*cp && (*cp != '\n')) \ 733 return -EINVAL; \ 734 i->f->set_rport_##field(rport, val); \ 735 return count; \ 736 } 737 738 #define fc_rport_rd_attr(field, format_string, sz) \ 739 fc_rport_show_function(field, format_string, sz, ) \ 740 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 741 show_fc_rport_##field, NULL) 742 743 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 744 fc_rport_show_function(field, format_string, sz, (cast)) \ 745 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 746 show_fc_rport_##field, NULL) 747 748 #define fc_rport_rw_attr(field, format_string, sz) \ 749 fc_rport_show_function(field, format_string, sz, ) \ 750 fc_rport_store_function(field) \ 751 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 752 show_fc_rport_##field, \ 753 store_fc_rport_##field) 754 755 756 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 757 static ssize_t \ 758 show_fc_rport_##field (struct device *dev, \ 759 struct device_attribute *attr, char *buf) \ 760 { \ 761 struct fc_rport *rport = transport_class_to_rport(dev); \ 762 return snprintf(buf, sz, format_string, cast rport->field); \ 763 } 764 765 #define fc_private_rport_rd_attr(field, format_string, sz) \ 766 fc_private_rport_show_function(field, format_string, sz, ) \ 767 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 768 show_fc_rport_##field, NULL) 769 770 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 771 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 772 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 773 show_fc_rport_##field, NULL) 774 775 776 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 777 static ssize_t \ 778 show_fc_rport_##title (struct device *dev, \ 779 struct device_attribute *attr, char *buf) \ 780 { \ 781 struct fc_rport *rport = transport_class_to_rport(dev); \ 782 const char *name; \ 783 name = get_fc_##title##_name(rport->title); \ 784 if (!name) \ 785 return -EINVAL; \ 786 return snprintf(buf, maxlen, "%s\n", name); \ 787 } \ 788 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 789 show_fc_rport_##title, NULL) 790 791 792 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 793 i->private_rport_attrs[count] = device_attr_rport_##field; \ 794 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 795 i->private_rport_attrs[count].store = NULL; \ 796 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 797 if (i->f->show_rport_##field) \ 798 count++ 799 800 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 801 i->private_rport_attrs[count] = device_attr_rport_##field; \ 802 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 803 i->private_rport_attrs[count].store = NULL; \ 804 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 805 count++ 806 807 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 808 i->private_rport_attrs[count] = device_attr_rport_##field; \ 809 if (!i->f->set_rport_##field) { \ 810 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 811 i->private_rport_attrs[count].store = NULL; \ 812 } \ 813 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 814 if (i->f->show_rport_##field) \ 815 count++ 816 817 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 818 { \ 819 i->private_rport_attrs[count] = device_attr_rport_##field; \ 820 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 821 count++; \ 822 } 823 824 825 /* The FC Transport Remote Port Attributes: */ 826 827 /* Fixed Remote Port Attributes */ 828 829 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 830 831 static ssize_t 832 show_fc_rport_supported_classes (struct device *dev, 833 struct device_attribute *attr, char *buf) 834 { 835 struct fc_rport *rport = transport_class_to_rport(dev); 836 if (rport->supported_classes == FC_COS_UNSPECIFIED) 837 return snprintf(buf, 20, "unspecified\n"); 838 return get_fc_cos_names(rport->supported_classes, buf); 839 } 840 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 841 show_fc_rport_supported_classes, NULL); 842 843 /* Dynamic Remote Port Attributes */ 844 845 /* 846 * dev_loss_tmo attribute 847 */ 848 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 849 { 850 char *cp; 851 852 *val = simple_strtoul(buf, &cp, 0); 853 if ((*cp && (*cp != '\n')) || (*val < 0)) 854 return -EINVAL; 855 /* 856 * Check for overflow; dev_loss_tmo is u32 857 */ 858 if (*val > UINT_MAX) 859 return -EINVAL; 860 861 return 0; 862 } 863 864 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 865 unsigned long val) 866 { 867 struct Scsi_Host *shost = rport_to_shost(rport); 868 struct fc_internal *i = to_fc_internal(shost->transportt); 869 870 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 871 (rport->port_state == FC_PORTSTATE_DELETED) || 872 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 873 return -EBUSY; 874 /* 875 * Check for overflow; dev_loss_tmo is u32 876 */ 877 if (val > UINT_MAX) 878 return -EINVAL; 879 880 /* 881 * If fast_io_fail is off we have to cap 882 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 883 */ 884 if (rport->fast_io_fail_tmo == -1 && 885 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 886 return -EINVAL; 887 888 i->f->set_rport_dev_loss_tmo(rport, val); 889 return 0; 890 } 891 892 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 893 static ssize_t 894 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 895 const char *buf, size_t count) 896 { 897 struct fc_rport *rport = transport_class_to_rport(dev); 898 unsigned long val; 899 int rc; 900 901 rc = fc_str_to_dev_loss(buf, &val); 902 if (rc) 903 return rc; 904 905 rc = fc_rport_set_dev_loss_tmo(rport, val); 906 if (rc) 907 return rc; 908 return count; 909 } 910 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 911 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 912 913 914 /* Private Remote Port Attributes */ 915 916 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 917 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 918 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 919 920 static ssize_t 921 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 922 char *buf) 923 { 924 struct fc_rport *rport = transport_class_to_rport(dev); 925 926 /* identify any roles that are port_id specific */ 927 if ((rport->port_id != -1) && 928 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 929 FC_WELLKNOWN_PORTID_MASK) { 930 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 931 case FC_FPORT_PORTID: 932 return snprintf(buf, 30, "Fabric Port\n"); 933 case FC_FABCTLR_PORTID: 934 return snprintf(buf, 30, "Fabric Controller\n"); 935 case FC_DIRSRVR_PORTID: 936 return snprintf(buf, 30, "Directory Server\n"); 937 case FC_TIMESRVR_PORTID: 938 return snprintf(buf, 30, "Time Server\n"); 939 case FC_MGMTSRVR_PORTID: 940 return snprintf(buf, 30, "Management Server\n"); 941 default: 942 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 943 } 944 } else { 945 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 946 return snprintf(buf, 20, "unknown\n"); 947 return get_fc_port_roles_names(rport->roles, buf); 948 } 949 } 950 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 951 show_fc_rport_roles, NULL); 952 953 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 954 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 955 956 /* 957 * fast_io_fail_tmo attribute 958 */ 959 static ssize_t 960 show_fc_rport_fast_io_fail_tmo (struct device *dev, 961 struct device_attribute *attr, char *buf) 962 { 963 struct fc_rport *rport = transport_class_to_rport(dev); 964 965 if (rport->fast_io_fail_tmo == -1) 966 return snprintf(buf, 5, "off\n"); 967 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 968 } 969 970 static ssize_t 971 store_fc_rport_fast_io_fail_tmo(struct device *dev, 972 struct device_attribute *attr, const char *buf, 973 size_t count) 974 { 975 int val; 976 char *cp; 977 struct fc_rport *rport = transport_class_to_rport(dev); 978 979 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 980 (rport->port_state == FC_PORTSTATE_DELETED) || 981 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 982 return -EBUSY; 983 if (strncmp(buf, "off", 3) == 0) 984 rport->fast_io_fail_tmo = -1; 985 else { 986 val = simple_strtoul(buf, &cp, 0); 987 if ((*cp && (*cp != '\n')) || (val < 0)) 988 return -EINVAL; 989 /* 990 * Cap fast_io_fail by dev_loss_tmo or 991 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 992 */ 993 if ((val >= rport->dev_loss_tmo) || 994 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 995 return -EINVAL; 996 997 rport->fast_io_fail_tmo = val; 998 } 999 return count; 1000 } 1001 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 1002 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 1003 1004 1005 /* 1006 * FC SCSI Target Attribute Management 1007 */ 1008 1009 /* 1010 * Note: in the target show function we recognize when the remote 1011 * port is in the hierarchy and do not allow the driver to get 1012 * involved in sysfs functions. The driver only gets involved if 1013 * it's the "old" style that doesn't use rports. 1014 */ 1015 #define fc_starget_show_function(field, format_string, sz, cast) \ 1016 static ssize_t \ 1017 show_fc_starget_##field (struct device *dev, \ 1018 struct device_attribute *attr, char *buf) \ 1019 { \ 1020 struct scsi_target *starget = transport_class_to_starget(dev); \ 1021 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1022 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1023 struct fc_rport *rport = starget_to_rport(starget); \ 1024 if (rport) \ 1025 fc_starget_##field(starget) = rport->field; \ 1026 else if (i->f->get_starget_##field) \ 1027 i->f->get_starget_##field(starget); \ 1028 return snprintf(buf, sz, format_string, \ 1029 cast fc_starget_##field(starget)); \ 1030 } 1031 1032 #define fc_starget_rd_attr(field, format_string, sz) \ 1033 fc_starget_show_function(field, format_string, sz, ) \ 1034 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1035 show_fc_starget_##field, NULL) 1036 1037 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1038 fc_starget_show_function(field, format_string, sz, (cast)) \ 1039 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1040 show_fc_starget_##field, NULL) 1041 1042 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1043 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1044 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1045 i->private_starget_attrs[count].store = NULL; \ 1046 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1047 if (i->f->show_starget_##field) \ 1048 count++ 1049 1050 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1051 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1052 if (!i->f->set_starget_##field) { \ 1053 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1054 i->private_starget_attrs[count].store = NULL; \ 1055 } \ 1056 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1057 if (i->f->show_starget_##field) \ 1058 count++ 1059 1060 /* The FC Transport SCSI Target Attributes: */ 1061 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1062 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1063 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1064 1065 1066 /* 1067 * FC Virtual Port Attribute Management 1068 */ 1069 1070 #define fc_vport_show_function(field, format_string, sz, cast) \ 1071 static ssize_t \ 1072 show_fc_vport_##field (struct device *dev, \ 1073 struct device_attribute *attr, char *buf) \ 1074 { \ 1075 struct fc_vport *vport = transport_class_to_vport(dev); \ 1076 struct Scsi_Host *shost = vport_to_shost(vport); \ 1077 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1078 if ((i->f->get_vport_##field) && \ 1079 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1080 i->f->get_vport_##field(vport); \ 1081 return snprintf(buf, sz, format_string, cast vport->field); \ 1082 } 1083 1084 #define fc_vport_store_function(field) \ 1085 static ssize_t \ 1086 store_fc_vport_##field(struct device *dev, \ 1087 struct device_attribute *attr, \ 1088 const char *buf, size_t count) \ 1089 { \ 1090 int val; \ 1091 struct fc_vport *vport = transport_class_to_vport(dev); \ 1092 struct Scsi_Host *shost = vport_to_shost(vport); \ 1093 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1094 char *cp; \ 1095 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1096 return -EBUSY; \ 1097 val = simple_strtoul(buf, &cp, 0); \ 1098 if (*cp && (*cp != '\n')) \ 1099 return -EINVAL; \ 1100 i->f->set_vport_##field(vport, val); \ 1101 return count; \ 1102 } 1103 1104 #define fc_vport_store_str_function(field, slen) \ 1105 static ssize_t \ 1106 store_fc_vport_##field(struct device *dev, \ 1107 struct device_attribute *attr, \ 1108 const char *buf, size_t count) \ 1109 { \ 1110 struct fc_vport *vport = transport_class_to_vport(dev); \ 1111 struct Scsi_Host *shost = vport_to_shost(vport); \ 1112 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1113 unsigned int cnt=count; \ 1114 \ 1115 /* count may include a LF at end of string */ \ 1116 if (buf[cnt-1] == '\n') \ 1117 cnt--; \ 1118 if (cnt > ((slen) - 1)) \ 1119 return -EINVAL; \ 1120 memcpy(vport->field, buf, cnt); \ 1121 i->f->set_vport_##field(vport); \ 1122 return count; \ 1123 } 1124 1125 #define fc_vport_rd_attr(field, format_string, sz) \ 1126 fc_vport_show_function(field, format_string, sz, ) \ 1127 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1128 show_fc_vport_##field, NULL) 1129 1130 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1131 fc_vport_show_function(field, format_string, sz, (cast)) \ 1132 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1133 show_fc_vport_##field, NULL) 1134 1135 #define fc_vport_rw_attr(field, format_string, sz) \ 1136 fc_vport_show_function(field, format_string, sz, ) \ 1137 fc_vport_store_function(field) \ 1138 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1139 show_fc_vport_##field, \ 1140 store_fc_vport_##field) 1141 1142 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1143 static ssize_t \ 1144 show_fc_vport_##field (struct device *dev, \ 1145 struct device_attribute *attr, char *buf) \ 1146 { \ 1147 struct fc_vport *vport = transport_class_to_vport(dev); \ 1148 return snprintf(buf, sz, format_string, cast vport->field); \ 1149 } 1150 1151 #define fc_private_vport_store_u32_function(field) \ 1152 static ssize_t \ 1153 store_fc_vport_##field(struct device *dev, \ 1154 struct device_attribute *attr, \ 1155 const char *buf, size_t count) \ 1156 { \ 1157 u32 val; \ 1158 struct fc_vport *vport = transport_class_to_vport(dev); \ 1159 char *cp; \ 1160 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1161 return -EBUSY; \ 1162 val = simple_strtoul(buf, &cp, 0); \ 1163 if (*cp && (*cp != '\n')) \ 1164 return -EINVAL; \ 1165 vport->field = val; \ 1166 return count; \ 1167 } 1168 1169 1170 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1171 fc_private_vport_show_function(field, format_string, sz, ) \ 1172 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1173 show_fc_vport_##field, NULL) 1174 1175 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1176 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1177 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1178 show_fc_vport_##field, NULL) 1179 1180 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1181 fc_private_vport_show_function(field, format_string, sz, ) \ 1182 fc_private_vport_store_u32_function(field) \ 1183 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1184 show_fc_vport_##field, \ 1185 store_fc_vport_##field) 1186 1187 1188 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1189 static ssize_t \ 1190 show_fc_vport_##title (struct device *dev, \ 1191 struct device_attribute *attr, \ 1192 char *buf) \ 1193 { \ 1194 struct fc_vport *vport = transport_class_to_vport(dev); \ 1195 const char *name; \ 1196 name = get_fc_##title##_name(vport->title); \ 1197 if (!name) \ 1198 return -EINVAL; \ 1199 return snprintf(buf, maxlen, "%s\n", name); \ 1200 } \ 1201 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1202 show_fc_vport_##title, NULL) 1203 1204 1205 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1206 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1207 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1208 i->private_vport_attrs[count].store = NULL; \ 1209 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1210 if (i->f->get_##field) \ 1211 count++ 1212 /* NOTE: Above MACRO differs: checks function not show bit */ 1213 1214 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1215 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1216 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1217 i->private_vport_attrs[count].store = NULL; \ 1218 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1219 count++ 1220 1221 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1222 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1223 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1224 if (i->f->field) \ 1225 count++ 1226 /* NOTE: Above MACRO differs: checks function */ 1227 1228 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1229 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1230 if (!i->f->set_vport_##field) { \ 1231 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1232 i->private_vport_attrs[count].store = NULL; \ 1233 } \ 1234 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1235 count++ 1236 /* NOTE: Above MACRO differs: does not check show bit */ 1237 1238 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1239 { \ 1240 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1241 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1242 count++; \ 1243 } 1244 1245 1246 /* The FC Transport Virtual Port Attributes: */ 1247 1248 /* Fixed Virtual Port Attributes */ 1249 1250 /* Dynamic Virtual Port Attributes */ 1251 1252 /* Private Virtual Port Attributes */ 1253 1254 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1255 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1256 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1257 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1258 1259 static ssize_t 1260 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1261 char *buf) 1262 { 1263 struct fc_vport *vport = transport_class_to_vport(dev); 1264 1265 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1266 return snprintf(buf, 20, "unknown\n"); 1267 return get_fc_port_roles_names(vport->roles, buf); 1268 } 1269 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1270 1271 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1272 1273 fc_private_vport_show_function(symbolic_name, "%s\n", 1274 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1275 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1276 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1277 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1278 1279 static ssize_t 1280 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1281 const char *buf, size_t count) 1282 { 1283 struct fc_vport *vport = transport_class_to_vport(dev); 1284 struct Scsi_Host *shost = vport_to_shost(vport); 1285 unsigned long flags; 1286 1287 spin_lock_irqsave(shost->host_lock, flags); 1288 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1289 spin_unlock_irqrestore(shost->host_lock, flags); 1290 return -EBUSY; 1291 } 1292 vport->flags |= FC_VPORT_DELETING; 1293 spin_unlock_irqrestore(shost->host_lock, flags); 1294 1295 fc_queue_work(shost, &vport->vport_delete_work); 1296 return count; 1297 } 1298 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1299 NULL, store_fc_vport_delete); 1300 1301 1302 /* 1303 * Enable/Disable vport 1304 * Write "1" to disable, write "0" to enable 1305 */ 1306 static ssize_t 1307 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1308 const char *buf, 1309 size_t count) 1310 { 1311 struct fc_vport *vport = transport_class_to_vport(dev); 1312 struct Scsi_Host *shost = vport_to_shost(vport); 1313 struct fc_internal *i = to_fc_internal(shost->transportt); 1314 int stat; 1315 1316 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1317 return -EBUSY; 1318 1319 if (*buf == '0') { 1320 if (vport->vport_state != FC_VPORT_DISABLED) 1321 return -EALREADY; 1322 } else if (*buf == '1') { 1323 if (vport->vport_state == FC_VPORT_DISABLED) 1324 return -EALREADY; 1325 } else 1326 return -EINVAL; 1327 1328 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1329 return stat ? stat : count; 1330 } 1331 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1332 NULL, store_fc_vport_disable); 1333 1334 1335 /* 1336 * Host Attribute Management 1337 */ 1338 1339 #define fc_host_show_function(field, format_string, sz, cast) \ 1340 static ssize_t \ 1341 show_fc_host_##field (struct device *dev, \ 1342 struct device_attribute *attr, char *buf) \ 1343 { \ 1344 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1345 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1346 if (i->f->get_host_##field) \ 1347 i->f->get_host_##field(shost); \ 1348 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1349 } 1350 1351 #define fc_host_store_function(field) \ 1352 static ssize_t \ 1353 store_fc_host_##field(struct device *dev, \ 1354 struct device_attribute *attr, \ 1355 const char *buf, size_t count) \ 1356 { \ 1357 int val; \ 1358 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1359 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1360 char *cp; \ 1361 \ 1362 val = simple_strtoul(buf, &cp, 0); \ 1363 if (*cp && (*cp != '\n')) \ 1364 return -EINVAL; \ 1365 i->f->set_host_##field(shost, val); \ 1366 return count; \ 1367 } 1368 1369 #define fc_host_store_str_function(field, slen) \ 1370 static ssize_t \ 1371 store_fc_host_##field(struct device *dev, \ 1372 struct device_attribute *attr, \ 1373 const char *buf, size_t count) \ 1374 { \ 1375 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1376 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1377 unsigned int cnt=count; \ 1378 \ 1379 /* count may include a LF at end of string */ \ 1380 if (buf[cnt-1] == '\n') \ 1381 cnt--; \ 1382 if (cnt > ((slen) - 1)) \ 1383 return -EINVAL; \ 1384 memcpy(fc_host_##field(shost), buf, cnt); \ 1385 i->f->set_host_##field(shost); \ 1386 return count; \ 1387 } 1388 1389 #define fc_host_rd_attr(field, format_string, sz) \ 1390 fc_host_show_function(field, format_string, sz, ) \ 1391 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1392 show_fc_host_##field, NULL) 1393 1394 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1395 fc_host_show_function(field, format_string, sz, (cast)) \ 1396 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1397 show_fc_host_##field, NULL) 1398 1399 #define fc_host_rw_attr(field, format_string, sz) \ 1400 fc_host_show_function(field, format_string, sz, ) \ 1401 fc_host_store_function(field) \ 1402 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1403 show_fc_host_##field, \ 1404 store_fc_host_##field) 1405 1406 #define fc_host_rd_enum_attr(title, maxlen) \ 1407 static ssize_t \ 1408 show_fc_host_##title (struct device *dev, \ 1409 struct device_attribute *attr, char *buf) \ 1410 { \ 1411 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1412 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1413 const char *name; \ 1414 if (i->f->get_host_##title) \ 1415 i->f->get_host_##title(shost); \ 1416 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1417 if (!name) \ 1418 return -EINVAL; \ 1419 return snprintf(buf, maxlen, "%s\n", name); \ 1420 } \ 1421 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1422 1423 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1424 i->private_host_attrs[count] = device_attr_host_##field; \ 1425 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1426 i->private_host_attrs[count].store = NULL; \ 1427 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1428 if (i->f->show_host_##field) \ 1429 count++ 1430 1431 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1432 i->private_host_attrs[count] = device_attr_host_##field; \ 1433 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1434 i->private_host_attrs[count].store = NULL; \ 1435 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1436 count++ 1437 1438 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1439 i->private_host_attrs[count] = device_attr_host_##field; \ 1440 if (!i->f->set_host_##field) { \ 1441 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1442 i->private_host_attrs[count].store = NULL; \ 1443 } \ 1444 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1445 if (i->f->show_host_##field) \ 1446 count++ 1447 1448 1449 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1450 static ssize_t \ 1451 show_fc_host_##field (struct device *dev, \ 1452 struct device_attribute *attr, char *buf) \ 1453 { \ 1454 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1455 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1456 } 1457 1458 #define fc_private_host_rd_attr(field, format_string, sz) \ 1459 fc_private_host_show_function(field, format_string, sz, ) \ 1460 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1461 show_fc_host_##field, NULL) 1462 1463 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1464 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1465 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1466 show_fc_host_##field, NULL) 1467 1468 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1469 i->private_host_attrs[count] = device_attr_host_##field; \ 1470 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1471 i->private_host_attrs[count].store = NULL; \ 1472 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1473 count++ 1474 1475 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1476 { \ 1477 i->private_host_attrs[count] = device_attr_host_##field; \ 1478 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1479 count++; \ 1480 } 1481 1482 1483 /* Fixed Host Attributes */ 1484 1485 static ssize_t 1486 show_fc_host_supported_classes (struct device *dev, 1487 struct device_attribute *attr, char *buf) 1488 { 1489 struct Scsi_Host *shost = transport_class_to_shost(dev); 1490 1491 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1492 return snprintf(buf, 20, "unspecified\n"); 1493 1494 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1495 } 1496 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1497 show_fc_host_supported_classes, NULL); 1498 1499 static ssize_t 1500 show_fc_host_supported_fc4s (struct device *dev, 1501 struct device_attribute *attr, char *buf) 1502 { 1503 struct Scsi_Host *shost = transport_class_to_shost(dev); 1504 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1505 } 1506 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1507 show_fc_host_supported_fc4s, NULL); 1508 1509 static ssize_t 1510 show_fc_host_supported_speeds (struct device *dev, 1511 struct device_attribute *attr, char *buf) 1512 { 1513 struct Scsi_Host *shost = transport_class_to_shost(dev); 1514 1515 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1516 return snprintf(buf, 20, "unknown\n"); 1517 1518 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1519 } 1520 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1521 show_fc_host_supported_speeds, NULL); 1522 1523 1524 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1525 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1526 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1527 unsigned long long); 1528 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1529 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1530 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1531 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1532 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1533 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1534 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1535 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1536 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1537 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1538 1539 1540 /* Dynamic Host Attributes */ 1541 1542 static ssize_t 1543 show_fc_host_active_fc4s (struct device *dev, 1544 struct device_attribute *attr, char *buf) 1545 { 1546 struct Scsi_Host *shost = transport_class_to_shost(dev); 1547 struct fc_internal *i = to_fc_internal(shost->transportt); 1548 1549 if (i->f->get_host_active_fc4s) 1550 i->f->get_host_active_fc4s(shost); 1551 1552 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1553 } 1554 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1555 show_fc_host_active_fc4s, NULL); 1556 1557 static ssize_t 1558 show_fc_host_speed (struct device *dev, 1559 struct device_attribute *attr, char *buf) 1560 { 1561 struct Scsi_Host *shost = transport_class_to_shost(dev); 1562 struct fc_internal *i = to_fc_internal(shost->transportt); 1563 1564 if (i->f->get_host_speed) 1565 i->f->get_host_speed(shost); 1566 1567 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1568 return snprintf(buf, 20, "unknown\n"); 1569 1570 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1571 } 1572 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1573 show_fc_host_speed, NULL); 1574 1575 1576 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1577 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1578 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1579 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1580 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1581 1582 fc_private_host_show_function(system_hostname, "%s\n", 1583 FC_SYMBOLIC_NAME_SIZE + 1, ) 1584 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1585 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1586 show_fc_host_system_hostname, store_fc_host_system_hostname); 1587 1588 1589 /* Private Host Attributes */ 1590 1591 static ssize_t 1592 show_fc_private_host_tgtid_bind_type(struct device *dev, 1593 struct device_attribute *attr, char *buf) 1594 { 1595 struct Scsi_Host *shost = transport_class_to_shost(dev); 1596 const char *name; 1597 1598 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1599 if (!name) 1600 return -EINVAL; 1601 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1602 } 1603 1604 #define get_list_head_entry(pos, head, member) \ 1605 pos = list_entry((head)->next, typeof(*pos), member) 1606 1607 static ssize_t 1608 store_fc_private_host_tgtid_bind_type(struct device *dev, 1609 struct device_attribute *attr, const char *buf, size_t count) 1610 { 1611 struct Scsi_Host *shost = transport_class_to_shost(dev); 1612 struct fc_rport *rport; 1613 enum fc_tgtid_binding_type val; 1614 unsigned long flags; 1615 1616 if (get_fc_tgtid_bind_type_match(buf, &val)) 1617 return -EINVAL; 1618 1619 /* if changing bind type, purge all unused consistent bindings */ 1620 if (val != fc_host_tgtid_bind_type(shost)) { 1621 spin_lock_irqsave(shost->host_lock, flags); 1622 while (!list_empty(&fc_host_rport_bindings(shost))) { 1623 get_list_head_entry(rport, 1624 &fc_host_rport_bindings(shost), peers); 1625 list_del(&rport->peers); 1626 rport->port_state = FC_PORTSTATE_DELETED; 1627 fc_queue_work(shost, &rport->rport_delete_work); 1628 } 1629 spin_unlock_irqrestore(shost->host_lock, flags); 1630 } 1631 1632 fc_host_tgtid_bind_type(shost) = val; 1633 return count; 1634 } 1635 1636 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1637 show_fc_private_host_tgtid_bind_type, 1638 store_fc_private_host_tgtid_bind_type); 1639 1640 static ssize_t 1641 store_fc_private_host_issue_lip(struct device *dev, 1642 struct device_attribute *attr, const char *buf, size_t count) 1643 { 1644 struct Scsi_Host *shost = transport_class_to_shost(dev); 1645 struct fc_internal *i = to_fc_internal(shost->transportt); 1646 int ret; 1647 1648 /* ignore any data value written to the attribute */ 1649 if (i->f->issue_fc_host_lip) { 1650 ret = i->f->issue_fc_host_lip(shost); 1651 return ret ? ret: count; 1652 } 1653 1654 return -ENOENT; 1655 } 1656 1657 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1658 store_fc_private_host_issue_lip); 1659 1660 static ssize_t 1661 store_fc_private_host_dev_loss_tmo(struct device *dev, 1662 struct device_attribute *attr, 1663 const char *buf, size_t count) 1664 { 1665 struct Scsi_Host *shost = transport_class_to_shost(dev); 1666 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1667 struct fc_rport *rport; 1668 unsigned long val, flags; 1669 int rc; 1670 1671 rc = fc_str_to_dev_loss(buf, &val); 1672 if (rc) 1673 return rc; 1674 1675 fc_host_dev_loss_tmo(shost) = val; 1676 spin_lock_irqsave(shost->host_lock, flags); 1677 list_for_each_entry(rport, &fc_host->rports, peers) 1678 fc_rport_set_dev_loss_tmo(rport, val); 1679 spin_unlock_irqrestore(shost->host_lock, flags); 1680 return count; 1681 } 1682 1683 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 1684 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 1685 show_fc_host_dev_loss_tmo, 1686 store_fc_private_host_dev_loss_tmo); 1687 1688 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1689 1690 /* 1691 * Host Statistics Management 1692 */ 1693 1694 /* Show a given an attribute in the statistics group */ 1695 static ssize_t 1696 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1697 { 1698 struct Scsi_Host *shost = transport_class_to_shost(dev); 1699 struct fc_internal *i = to_fc_internal(shost->transportt); 1700 struct fc_host_statistics *stats; 1701 ssize_t ret = -ENOENT; 1702 1703 if (offset > sizeof(struct fc_host_statistics) || 1704 offset % sizeof(u64) != 0) 1705 WARN_ON(1); 1706 1707 if (i->f->get_fc_host_stats) { 1708 stats = (i->f->get_fc_host_stats)(shost); 1709 if (stats) 1710 ret = snprintf(buf, 20, "0x%llx\n", 1711 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1712 } 1713 return ret; 1714 } 1715 1716 1717 /* generate a read-only statistics attribute */ 1718 #define fc_host_statistic(name) \ 1719 static ssize_t show_fcstat_##name(struct device *cd, \ 1720 struct device_attribute *attr, \ 1721 char *buf) \ 1722 { \ 1723 return fc_stat_show(cd, buf, \ 1724 offsetof(struct fc_host_statistics, name)); \ 1725 } \ 1726 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1727 1728 fc_host_statistic(seconds_since_last_reset); 1729 fc_host_statistic(tx_frames); 1730 fc_host_statistic(tx_words); 1731 fc_host_statistic(rx_frames); 1732 fc_host_statistic(rx_words); 1733 fc_host_statistic(lip_count); 1734 fc_host_statistic(nos_count); 1735 fc_host_statistic(error_frames); 1736 fc_host_statistic(dumped_frames); 1737 fc_host_statistic(link_failure_count); 1738 fc_host_statistic(loss_of_sync_count); 1739 fc_host_statistic(loss_of_signal_count); 1740 fc_host_statistic(prim_seq_protocol_err_count); 1741 fc_host_statistic(invalid_tx_word_count); 1742 fc_host_statistic(invalid_crc_count); 1743 fc_host_statistic(fcp_input_requests); 1744 fc_host_statistic(fcp_output_requests); 1745 fc_host_statistic(fcp_control_requests); 1746 fc_host_statistic(fcp_input_megabytes); 1747 fc_host_statistic(fcp_output_megabytes); 1748 fc_host_statistic(fcp_packet_alloc_failures); 1749 fc_host_statistic(fcp_packet_aborts); 1750 fc_host_statistic(fcp_frame_alloc_failures); 1751 fc_host_statistic(fc_no_free_exch); 1752 fc_host_statistic(fc_no_free_exch_xid); 1753 fc_host_statistic(fc_xid_not_found); 1754 fc_host_statistic(fc_xid_busy); 1755 fc_host_statistic(fc_seq_not_found); 1756 fc_host_statistic(fc_non_bls_resp); 1757 1758 static ssize_t 1759 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1760 const char *buf, size_t count) 1761 { 1762 struct Scsi_Host *shost = transport_class_to_shost(dev); 1763 struct fc_internal *i = to_fc_internal(shost->transportt); 1764 1765 /* ignore any data value written to the attribute */ 1766 if (i->f->reset_fc_host_stats) { 1767 i->f->reset_fc_host_stats(shost); 1768 return count; 1769 } 1770 1771 return -ENOENT; 1772 } 1773 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1774 fc_reset_statistics); 1775 1776 static struct attribute *fc_statistics_attrs[] = { 1777 &device_attr_host_seconds_since_last_reset.attr, 1778 &device_attr_host_tx_frames.attr, 1779 &device_attr_host_tx_words.attr, 1780 &device_attr_host_rx_frames.attr, 1781 &device_attr_host_rx_words.attr, 1782 &device_attr_host_lip_count.attr, 1783 &device_attr_host_nos_count.attr, 1784 &device_attr_host_error_frames.attr, 1785 &device_attr_host_dumped_frames.attr, 1786 &device_attr_host_link_failure_count.attr, 1787 &device_attr_host_loss_of_sync_count.attr, 1788 &device_attr_host_loss_of_signal_count.attr, 1789 &device_attr_host_prim_seq_protocol_err_count.attr, 1790 &device_attr_host_invalid_tx_word_count.attr, 1791 &device_attr_host_invalid_crc_count.attr, 1792 &device_attr_host_fcp_input_requests.attr, 1793 &device_attr_host_fcp_output_requests.attr, 1794 &device_attr_host_fcp_control_requests.attr, 1795 &device_attr_host_fcp_input_megabytes.attr, 1796 &device_attr_host_fcp_output_megabytes.attr, 1797 &device_attr_host_fcp_packet_alloc_failures.attr, 1798 &device_attr_host_fcp_packet_aborts.attr, 1799 &device_attr_host_fcp_frame_alloc_failures.attr, 1800 &device_attr_host_fc_no_free_exch.attr, 1801 &device_attr_host_fc_no_free_exch_xid.attr, 1802 &device_attr_host_fc_xid_not_found.attr, 1803 &device_attr_host_fc_xid_busy.attr, 1804 &device_attr_host_fc_seq_not_found.attr, 1805 &device_attr_host_fc_non_bls_resp.attr, 1806 &device_attr_host_reset_statistics.attr, 1807 NULL 1808 }; 1809 1810 static struct attribute_group fc_statistics_group = { 1811 .name = "statistics", 1812 .attrs = fc_statistics_attrs, 1813 }; 1814 1815 1816 /* Host Vport Attributes */ 1817 1818 static int 1819 fc_parse_wwn(const char *ns, u64 *nm) 1820 { 1821 unsigned int i, j; 1822 u8 wwn[8]; 1823 1824 memset(wwn, 0, sizeof(wwn)); 1825 1826 /* Validate and store the new name */ 1827 for (i=0, j=0; i < 16; i++) { 1828 int value; 1829 1830 value = hex_to_bin(*ns++); 1831 if (value >= 0) 1832 j = (j << 4) | value; 1833 else 1834 return -EINVAL; 1835 if (i % 2) { 1836 wwn[i/2] = j & 0xff; 1837 j = 0; 1838 } 1839 } 1840 1841 *nm = wwn_to_u64(wwn); 1842 1843 return 0; 1844 } 1845 1846 1847 /* 1848 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1849 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1850 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1851 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1852 */ 1853 static ssize_t 1854 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1855 const char *buf, size_t count) 1856 { 1857 struct Scsi_Host *shost = transport_class_to_shost(dev); 1858 struct fc_vport_identifiers vid; 1859 struct fc_vport *vport; 1860 unsigned int cnt=count; 1861 int stat; 1862 1863 memset(&vid, 0, sizeof(vid)); 1864 1865 /* count may include a LF at end of string */ 1866 if (buf[cnt-1] == '\n') 1867 cnt--; 1868 1869 /* validate we have enough characters for WWPN */ 1870 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1871 return -EINVAL; 1872 1873 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1874 if (stat) 1875 return stat; 1876 1877 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1878 if (stat) 1879 return stat; 1880 1881 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1882 vid.vport_type = FC_PORTTYPE_NPIV; 1883 /* vid.symbolic_name is already zero/NULL's */ 1884 vid.disable = false; /* always enabled */ 1885 1886 /* we only allow support on Channel 0 !!! */ 1887 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1888 return stat ? stat : count; 1889 } 1890 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1891 store_fc_host_vport_create); 1892 1893 1894 /* 1895 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1896 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1897 * The WWNs are specified as hex characters, and may *not* contain 1898 * any prefixes (e.g. 0x, x, etc) 1899 */ 1900 static ssize_t 1901 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1902 const char *buf, size_t count) 1903 { 1904 struct Scsi_Host *shost = transport_class_to_shost(dev); 1905 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1906 struct fc_vport *vport; 1907 u64 wwpn, wwnn; 1908 unsigned long flags; 1909 unsigned int cnt=count; 1910 int stat, match; 1911 1912 /* count may include a LF at end of string */ 1913 if (buf[cnt-1] == '\n') 1914 cnt--; 1915 1916 /* validate we have enough characters for WWPN */ 1917 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1918 return -EINVAL; 1919 1920 stat = fc_parse_wwn(&buf[0], &wwpn); 1921 if (stat) 1922 return stat; 1923 1924 stat = fc_parse_wwn(&buf[17], &wwnn); 1925 if (stat) 1926 return stat; 1927 1928 spin_lock_irqsave(shost->host_lock, flags); 1929 match = 0; 1930 /* we only allow support on Channel 0 !!! */ 1931 list_for_each_entry(vport, &fc_host->vports, peers) { 1932 if ((vport->channel == 0) && 1933 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1934 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1935 break; 1936 vport->flags |= FC_VPORT_DELETING; 1937 match = 1; 1938 break; 1939 } 1940 } 1941 spin_unlock_irqrestore(shost->host_lock, flags); 1942 1943 if (!match) 1944 return -ENODEV; 1945 1946 stat = fc_vport_terminate(vport); 1947 return stat ? stat : count; 1948 } 1949 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1950 store_fc_host_vport_delete); 1951 1952 1953 static int fc_host_match(struct attribute_container *cont, 1954 struct device *dev) 1955 { 1956 struct Scsi_Host *shost; 1957 struct fc_internal *i; 1958 1959 if (!scsi_is_host_device(dev)) 1960 return 0; 1961 1962 shost = dev_to_shost(dev); 1963 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1964 != &fc_host_class.class) 1965 return 0; 1966 1967 i = to_fc_internal(shost->transportt); 1968 1969 return &i->t.host_attrs.ac == cont; 1970 } 1971 1972 static int fc_target_match(struct attribute_container *cont, 1973 struct device *dev) 1974 { 1975 struct Scsi_Host *shost; 1976 struct fc_internal *i; 1977 1978 if (!scsi_is_target_device(dev)) 1979 return 0; 1980 1981 shost = dev_to_shost(dev->parent); 1982 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1983 != &fc_host_class.class) 1984 return 0; 1985 1986 i = to_fc_internal(shost->transportt); 1987 1988 return &i->t.target_attrs.ac == cont; 1989 } 1990 1991 static void fc_rport_dev_release(struct device *dev) 1992 { 1993 struct fc_rport *rport = dev_to_rport(dev); 1994 put_device(dev->parent); 1995 kfree(rport); 1996 } 1997 1998 int scsi_is_fc_rport(const struct device *dev) 1999 { 2000 return dev->release == fc_rport_dev_release; 2001 } 2002 EXPORT_SYMBOL(scsi_is_fc_rport); 2003 2004 static int fc_rport_match(struct attribute_container *cont, 2005 struct device *dev) 2006 { 2007 struct Scsi_Host *shost; 2008 struct fc_internal *i; 2009 2010 if (!scsi_is_fc_rport(dev)) 2011 return 0; 2012 2013 shost = dev_to_shost(dev->parent); 2014 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2015 != &fc_host_class.class) 2016 return 0; 2017 2018 i = to_fc_internal(shost->transportt); 2019 2020 return &i->rport_attr_cont.ac == cont; 2021 } 2022 2023 2024 static void fc_vport_dev_release(struct device *dev) 2025 { 2026 struct fc_vport *vport = dev_to_vport(dev); 2027 put_device(dev->parent); /* release kobj parent */ 2028 kfree(vport); 2029 } 2030 2031 static int scsi_is_fc_vport(const struct device *dev) 2032 { 2033 return dev->release == fc_vport_dev_release; 2034 } 2035 2036 static int fc_vport_match(struct attribute_container *cont, 2037 struct device *dev) 2038 { 2039 struct fc_vport *vport; 2040 struct Scsi_Host *shost; 2041 struct fc_internal *i; 2042 2043 if (!scsi_is_fc_vport(dev)) 2044 return 0; 2045 vport = dev_to_vport(dev); 2046 2047 shost = vport_to_shost(vport); 2048 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2049 != &fc_host_class.class) 2050 return 0; 2051 2052 i = to_fc_internal(shost->transportt); 2053 return &i->vport_attr_cont.ac == cont; 2054 } 2055 2056 2057 /** 2058 * fc_timed_out - FC Transport I/O timeout intercept handler 2059 * @scmd: The SCSI command which timed out 2060 * 2061 * This routine protects against error handlers getting invoked while a 2062 * rport is in a blocked state, typically due to a temporarily loss of 2063 * connectivity. If the error handlers are allowed to proceed, requests 2064 * to abort i/o, reset the target, etc will likely fail as there is no way 2065 * to communicate with the device to perform the requested function. These 2066 * failures may result in the midlayer taking the device offline, requiring 2067 * manual intervention to restore operation. 2068 * 2069 * This routine, called whenever an i/o times out, validates the state of 2070 * the underlying rport. If the rport is blocked, it returns 2071 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2072 * Eventually, either the device will return, or devloss_tmo will fire, 2073 * and when the timeout then fires, it will be handled normally. 2074 * If the rport is not blocked, normal error handling continues. 2075 * 2076 * Notes: 2077 * This routine assumes no locks are held on entry. 2078 */ 2079 static enum blk_eh_timer_return 2080 fc_timed_out(struct scsi_cmnd *scmd) 2081 { 2082 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2083 2084 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2085 return BLK_EH_RESET_TIMER; 2086 2087 return BLK_EH_NOT_HANDLED; 2088 } 2089 2090 /* 2091 * Called by fc_user_scan to locate an rport on the shost that 2092 * matches the channel and target id, and invoke scsi_scan_target() 2093 * on the rport. 2094 */ 2095 static void 2096 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2097 { 2098 struct fc_rport *rport; 2099 unsigned long flags; 2100 2101 spin_lock_irqsave(shost->host_lock, flags); 2102 2103 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2104 if (rport->scsi_target_id == -1) 2105 continue; 2106 2107 if (rport->port_state != FC_PORTSTATE_ONLINE) 2108 continue; 2109 2110 if ((channel == rport->channel) && 2111 (id == rport->scsi_target_id)) { 2112 spin_unlock_irqrestore(shost->host_lock, flags); 2113 scsi_scan_target(&rport->dev, channel, id, lun, 2114 SCSI_SCAN_MANUAL); 2115 return; 2116 } 2117 } 2118 2119 spin_unlock_irqrestore(shost->host_lock, flags); 2120 } 2121 2122 /* 2123 * Called via sysfs scan routines. Necessary, as the FC transport 2124 * wants to place all target objects below the rport object. So this 2125 * routine must invoke the scsi_scan_target() routine with the rport 2126 * object as the parent. 2127 */ 2128 static int 2129 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2130 { 2131 uint chlo, chhi; 2132 uint tgtlo, tgthi; 2133 2134 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2135 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2136 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2137 return -EINVAL; 2138 2139 if (channel == SCAN_WILD_CARD) { 2140 chlo = 0; 2141 chhi = shost->max_channel + 1; 2142 } else { 2143 chlo = channel; 2144 chhi = channel + 1; 2145 } 2146 2147 if (id == SCAN_WILD_CARD) { 2148 tgtlo = 0; 2149 tgthi = shost->max_id; 2150 } else { 2151 tgtlo = id; 2152 tgthi = id + 1; 2153 } 2154 2155 for ( ; chlo < chhi; chlo++) 2156 for ( ; tgtlo < tgthi; tgtlo++) 2157 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2158 2159 return 0; 2160 } 2161 2162 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, 2163 int result) 2164 { 2165 struct fc_internal *i = to_fc_internal(shost->transportt); 2166 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); 2167 } 2168 2169 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) 2170 { 2171 struct fc_internal *i = to_fc_internal(shost->transportt); 2172 return i->f->it_nexus_response(shost, nexus, result); 2173 } 2174 2175 struct scsi_transport_template * 2176 fc_attach_transport(struct fc_function_template *ft) 2177 { 2178 int count; 2179 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2180 GFP_KERNEL); 2181 2182 if (unlikely(!i)) 2183 return NULL; 2184 2185 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2186 i->t.target_attrs.ac.class = &fc_transport_class.class; 2187 i->t.target_attrs.ac.match = fc_target_match; 2188 i->t.target_size = sizeof(struct fc_starget_attrs); 2189 transport_container_register(&i->t.target_attrs); 2190 2191 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2192 i->t.host_attrs.ac.class = &fc_host_class.class; 2193 i->t.host_attrs.ac.match = fc_host_match; 2194 i->t.host_size = sizeof(struct fc_host_attrs); 2195 if (ft->get_fc_host_stats) 2196 i->t.host_attrs.statistics = &fc_statistics_group; 2197 transport_container_register(&i->t.host_attrs); 2198 2199 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2200 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2201 i->rport_attr_cont.ac.match = fc_rport_match; 2202 transport_container_register(&i->rport_attr_cont); 2203 2204 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2205 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2206 i->vport_attr_cont.ac.match = fc_vport_match; 2207 transport_container_register(&i->vport_attr_cont); 2208 2209 i->f = ft; 2210 2211 /* Transport uses the shost workq for scsi scanning */ 2212 i->t.create_work_queue = 1; 2213 2214 i->t.eh_timed_out = fc_timed_out; 2215 2216 i->t.user_scan = fc_user_scan; 2217 2218 /* target-mode drivers' functions */ 2219 i->t.tsk_mgmt_response = fc_tsk_mgmt_response; 2220 i->t.it_nexus_response = fc_it_nexus_response; 2221 2222 /* 2223 * Setup SCSI Target Attributes. 2224 */ 2225 count = 0; 2226 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2227 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2228 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2229 2230 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2231 2232 i->starget_attrs[count] = NULL; 2233 2234 2235 /* 2236 * Setup SCSI Host Attributes. 2237 */ 2238 count=0; 2239 SETUP_HOST_ATTRIBUTE_RD(node_name); 2240 SETUP_HOST_ATTRIBUTE_RD(port_name); 2241 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2242 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2243 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2244 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2245 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2246 if (ft->vport_create) { 2247 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2248 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2249 } 2250 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2251 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2252 SETUP_HOST_ATTRIBUTE_RD(model); 2253 SETUP_HOST_ATTRIBUTE_RD(model_description); 2254 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2255 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2256 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2257 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2258 2259 SETUP_HOST_ATTRIBUTE_RD(port_id); 2260 SETUP_HOST_ATTRIBUTE_RD(port_type); 2261 SETUP_HOST_ATTRIBUTE_RD(port_state); 2262 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2263 SETUP_HOST_ATTRIBUTE_RD(speed); 2264 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2265 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2266 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2267 2268 /* Transport-managed attributes */ 2269 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2270 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2271 if (ft->issue_fc_host_lip) 2272 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2273 if (ft->vport_create) 2274 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2275 if (ft->vport_delete) 2276 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2277 2278 BUG_ON(count > FC_HOST_NUM_ATTRS); 2279 2280 i->host_attrs[count] = NULL; 2281 2282 /* 2283 * Setup Remote Port Attributes. 2284 */ 2285 count=0; 2286 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2287 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2288 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2289 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2290 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2291 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2292 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2293 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2294 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2295 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2296 2297 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2298 2299 i->rport_attrs[count] = NULL; 2300 2301 /* 2302 * Setup Virtual Port Attributes. 2303 */ 2304 count=0; 2305 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2306 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2307 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2308 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2309 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2310 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2311 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2312 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2313 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2314 2315 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2316 2317 i->vport_attrs[count] = NULL; 2318 2319 return &i->t; 2320 } 2321 EXPORT_SYMBOL(fc_attach_transport); 2322 2323 void fc_release_transport(struct scsi_transport_template *t) 2324 { 2325 struct fc_internal *i = to_fc_internal(t); 2326 2327 transport_container_unregister(&i->t.target_attrs); 2328 transport_container_unregister(&i->t.host_attrs); 2329 transport_container_unregister(&i->rport_attr_cont); 2330 transport_container_unregister(&i->vport_attr_cont); 2331 2332 kfree(i); 2333 } 2334 EXPORT_SYMBOL(fc_release_transport); 2335 2336 /** 2337 * fc_queue_work - Queue work to the fc_host workqueue. 2338 * @shost: Pointer to Scsi_Host bound to fc_host. 2339 * @work: Work to queue for execution. 2340 * 2341 * Return value: 2342 * 1 - work queued for execution 2343 * 0 - work is already queued 2344 * -EINVAL - work queue doesn't exist 2345 */ 2346 static int 2347 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2348 { 2349 if (unlikely(!fc_host_work_q(shost))) { 2350 printk(KERN_ERR 2351 "ERROR: FC host '%s' attempted to queue work, " 2352 "when no workqueue created.\n", shost->hostt->name); 2353 dump_stack(); 2354 2355 return -EINVAL; 2356 } 2357 2358 return queue_work(fc_host_work_q(shost), work); 2359 } 2360 2361 /** 2362 * fc_flush_work - Flush a fc_host's workqueue. 2363 * @shost: Pointer to Scsi_Host bound to fc_host. 2364 */ 2365 static void 2366 fc_flush_work(struct Scsi_Host *shost) 2367 { 2368 if (!fc_host_work_q(shost)) { 2369 printk(KERN_ERR 2370 "ERROR: FC host '%s' attempted to flush work, " 2371 "when no workqueue created.\n", shost->hostt->name); 2372 dump_stack(); 2373 return; 2374 } 2375 2376 flush_workqueue(fc_host_work_q(shost)); 2377 } 2378 2379 /** 2380 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2381 * @shost: Pointer to Scsi_Host bound to fc_host. 2382 * @work: Work to queue for execution. 2383 * @delay: jiffies to delay the work queuing 2384 * 2385 * Return value: 2386 * 1 on success / 0 already queued / < 0 for error 2387 */ 2388 static int 2389 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2390 unsigned long delay) 2391 { 2392 if (unlikely(!fc_host_devloss_work_q(shost))) { 2393 printk(KERN_ERR 2394 "ERROR: FC host '%s' attempted to queue work, " 2395 "when no workqueue created.\n", shost->hostt->name); 2396 dump_stack(); 2397 2398 return -EINVAL; 2399 } 2400 2401 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2402 } 2403 2404 /** 2405 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2406 * @shost: Pointer to Scsi_Host bound to fc_host. 2407 */ 2408 static void 2409 fc_flush_devloss(struct Scsi_Host *shost) 2410 { 2411 if (!fc_host_devloss_work_q(shost)) { 2412 printk(KERN_ERR 2413 "ERROR: FC host '%s' attempted to flush work, " 2414 "when no workqueue created.\n", shost->hostt->name); 2415 dump_stack(); 2416 return; 2417 } 2418 2419 flush_workqueue(fc_host_devloss_work_q(shost)); 2420 } 2421 2422 2423 /** 2424 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2425 * @shost: Which &Scsi_Host 2426 * 2427 * This routine is expected to be called immediately preceding the 2428 * a driver's call to scsi_remove_host(). 2429 * 2430 * WARNING: A driver utilizing the fc_transport, which fails to call 2431 * this routine prior to scsi_remove_host(), will leave dangling 2432 * objects in /sys/class/fc_remote_ports. Access to any of these 2433 * objects can result in a system crash !!! 2434 * 2435 * Notes: 2436 * This routine assumes no locks are held on entry. 2437 */ 2438 void 2439 fc_remove_host(struct Scsi_Host *shost) 2440 { 2441 struct fc_vport *vport = NULL, *next_vport = NULL; 2442 struct fc_rport *rport = NULL, *next_rport = NULL; 2443 struct workqueue_struct *work_q; 2444 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2445 unsigned long flags; 2446 2447 spin_lock_irqsave(shost->host_lock, flags); 2448 2449 /* Remove any vports */ 2450 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) 2451 fc_queue_work(shost, &vport->vport_delete_work); 2452 2453 /* Remove any remote ports */ 2454 list_for_each_entry_safe(rport, next_rport, 2455 &fc_host->rports, peers) { 2456 list_del(&rport->peers); 2457 rport->port_state = FC_PORTSTATE_DELETED; 2458 fc_queue_work(shost, &rport->rport_delete_work); 2459 } 2460 2461 list_for_each_entry_safe(rport, next_rport, 2462 &fc_host->rport_bindings, peers) { 2463 list_del(&rport->peers); 2464 rport->port_state = FC_PORTSTATE_DELETED; 2465 fc_queue_work(shost, &rport->rport_delete_work); 2466 } 2467 2468 spin_unlock_irqrestore(shost->host_lock, flags); 2469 2470 /* flush all scan work items */ 2471 scsi_flush_work(shost); 2472 2473 /* flush all stgt delete, and rport delete work items, then kill it */ 2474 if (fc_host->work_q) { 2475 work_q = fc_host->work_q; 2476 fc_host->work_q = NULL; 2477 destroy_workqueue(work_q); 2478 } 2479 2480 /* flush all devloss work items, then kill it */ 2481 if (fc_host->devloss_work_q) { 2482 work_q = fc_host->devloss_work_q; 2483 fc_host->devloss_work_q = NULL; 2484 destroy_workqueue(work_q); 2485 } 2486 } 2487 EXPORT_SYMBOL(fc_remove_host); 2488 2489 static void fc_terminate_rport_io(struct fc_rport *rport) 2490 { 2491 struct Scsi_Host *shost = rport_to_shost(rport); 2492 struct fc_internal *i = to_fc_internal(shost->transportt); 2493 2494 /* Involve the LLDD if possible to terminate all io on the rport. */ 2495 if (i->f->terminate_rport_io) 2496 i->f->terminate_rport_io(rport); 2497 2498 /* 2499 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2500 */ 2501 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2502 } 2503 2504 /** 2505 * fc_starget_delete - called to delete the scsi descendants of an rport 2506 * @work: remote port to be operated on. 2507 * 2508 * Deletes target and all sdevs. 2509 */ 2510 static void 2511 fc_starget_delete(struct work_struct *work) 2512 { 2513 struct fc_rport *rport = 2514 container_of(work, struct fc_rport, stgt_delete_work); 2515 2516 fc_terminate_rport_io(rport); 2517 scsi_remove_target(&rport->dev); 2518 } 2519 2520 2521 /** 2522 * fc_rport_final_delete - finish rport termination and delete it. 2523 * @work: remote port to be deleted. 2524 */ 2525 static void 2526 fc_rport_final_delete(struct work_struct *work) 2527 { 2528 struct fc_rport *rport = 2529 container_of(work, struct fc_rport, rport_delete_work); 2530 struct device *dev = &rport->dev; 2531 struct Scsi_Host *shost = rport_to_shost(rport); 2532 struct fc_internal *i = to_fc_internal(shost->transportt); 2533 unsigned long flags; 2534 int do_callback = 0; 2535 2536 fc_terminate_rport_io(rport); 2537 2538 /* 2539 * if a scan is pending, flush the SCSI Host work_q so that 2540 * that we can reclaim the rport scan work element. 2541 */ 2542 if (rport->flags & FC_RPORT_SCAN_PENDING) 2543 scsi_flush_work(shost); 2544 2545 /* 2546 * Cancel any outstanding timers. These should really exist 2547 * only when rmmod'ing the LLDD and we're asking for 2548 * immediate termination of the rports 2549 */ 2550 spin_lock_irqsave(shost->host_lock, flags); 2551 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2552 spin_unlock_irqrestore(shost->host_lock, flags); 2553 if (!cancel_delayed_work(&rport->fail_io_work)) 2554 fc_flush_devloss(shost); 2555 if (!cancel_delayed_work(&rport->dev_loss_work)) 2556 fc_flush_devloss(shost); 2557 cancel_work_sync(&rport->scan_work); 2558 spin_lock_irqsave(shost->host_lock, flags); 2559 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2560 } 2561 spin_unlock_irqrestore(shost->host_lock, flags); 2562 2563 /* Delete SCSI target and sdevs */ 2564 if (rport->scsi_target_id != -1) 2565 fc_starget_delete(&rport->stgt_delete_work); 2566 2567 /* 2568 * Notify the driver that the rport is now dead. The LLDD will 2569 * also guarantee that any communication to the rport is terminated 2570 * 2571 * Avoid this call if we already called it when we preserved the 2572 * rport for the binding. 2573 */ 2574 spin_lock_irqsave(shost->host_lock, flags); 2575 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2576 (i->f->dev_loss_tmo_callbk)) { 2577 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2578 do_callback = 1; 2579 } 2580 spin_unlock_irqrestore(shost->host_lock, flags); 2581 2582 if (do_callback) 2583 i->f->dev_loss_tmo_callbk(rport); 2584 2585 fc_bsg_remove(rport->rqst_q); 2586 2587 transport_remove_device(dev); 2588 device_del(dev); 2589 transport_destroy_device(dev); 2590 scsi_host_put(shost); /* for fc_host->rport list */ 2591 put_device(dev); /* for self-reference */ 2592 } 2593 2594 2595 /** 2596 * fc_remote_port_create - allocates and creates a remote FC port. 2597 * @shost: scsi host the remote port is connected to. 2598 * @channel: Channel on shost port connected to. 2599 * @ids: The world wide names, fc address, and FC4 port 2600 * roles for the remote port. 2601 * 2602 * Allocates and creates the remoter port structure, including the 2603 * class and sysfs creation. 2604 * 2605 * Notes: 2606 * This routine assumes no locks are held on entry. 2607 */ 2608 static struct fc_rport * 2609 fc_remote_port_create(struct Scsi_Host *shost, int channel, 2610 struct fc_rport_identifiers *ids) 2611 { 2612 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2613 struct fc_internal *fci = to_fc_internal(shost->transportt); 2614 struct fc_rport *rport; 2615 struct device *dev; 2616 unsigned long flags; 2617 int error; 2618 size_t size; 2619 2620 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2621 rport = kzalloc(size, GFP_KERNEL); 2622 if (unlikely(!rport)) { 2623 printk(KERN_ERR "%s: allocation failure\n", __func__); 2624 return NULL; 2625 } 2626 2627 rport->maxframe_size = -1; 2628 rport->supported_classes = FC_COS_UNSPECIFIED; 2629 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2630 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2631 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2632 rport->port_id = ids->port_id; 2633 rport->roles = ids->roles; 2634 rport->port_state = FC_PORTSTATE_ONLINE; 2635 if (fci->f->dd_fcrport_size) 2636 rport->dd_data = &rport[1]; 2637 rport->channel = channel; 2638 rport->fast_io_fail_tmo = -1; 2639 2640 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2641 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2642 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2643 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2644 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2645 2646 spin_lock_irqsave(shost->host_lock, flags); 2647 2648 rport->number = fc_host->next_rport_number++; 2649 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) 2650 rport->scsi_target_id = fc_host->next_target_id++; 2651 else 2652 rport->scsi_target_id = -1; 2653 list_add_tail(&rport->peers, &fc_host->rports); 2654 scsi_host_get(shost); /* for fc_host->rport list */ 2655 2656 spin_unlock_irqrestore(shost->host_lock, flags); 2657 2658 dev = &rport->dev; 2659 device_initialize(dev); /* takes self reference */ 2660 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2661 dev->release = fc_rport_dev_release; 2662 dev_set_name(dev, "rport-%d:%d-%d", 2663 shost->host_no, channel, rport->number); 2664 transport_setup_device(dev); 2665 2666 error = device_add(dev); 2667 if (error) { 2668 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2669 goto delete_rport; 2670 } 2671 transport_add_device(dev); 2672 transport_configure_device(dev); 2673 2674 fc_bsg_rportadd(shost, rport); 2675 /* ignore any bsg add error - we just can't do sgio */ 2676 2677 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2678 /* initiate a scan of the target */ 2679 rport->flags |= FC_RPORT_SCAN_PENDING; 2680 scsi_queue_work(shost, &rport->scan_work); 2681 } 2682 2683 return rport; 2684 2685 delete_rport: 2686 transport_destroy_device(dev); 2687 spin_lock_irqsave(shost->host_lock, flags); 2688 list_del(&rport->peers); 2689 scsi_host_put(shost); /* for fc_host->rport list */ 2690 spin_unlock_irqrestore(shost->host_lock, flags); 2691 put_device(dev->parent); 2692 kfree(rport); 2693 return NULL; 2694 } 2695 2696 /** 2697 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2698 * @shost: scsi host the remote port is connected to. 2699 * @channel: Channel on shost port connected to. 2700 * @ids: The world wide names, fc address, and FC4 port 2701 * roles for the remote port. 2702 * 2703 * The LLDD calls this routine to notify the transport of the existence 2704 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2705 * of the port, it's FC address (port_id), and the FC4 roles that are 2706 * active for the port. 2707 * 2708 * For ports that are FCP targets (aka scsi targets), the FC transport 2709 * maintains consistent target id bindings on behalf of the LLDD. 2710 * A consistent target id binding is an assignment of a target id to 2711 * a remote port identifier, which persists while the scsi host is 2712 * attached. The remote port can disappear, then later reappear, and 2713 * it's target id assignment remains the same. This allows for shifts 2714 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2715 * changes to the scsi subsystem which is based on scsi host number and 2716 * target id values. Bindings are only valid during the attachment of 2717 * the scsi host. If the host detaches, then later re-attaches, target 2718 * id bindings may change. 2719 * 2720 * This routine is responsible for returning a remote port structure. 2721 * The routine will search the list of remote ports it maintains 2722 * internally on behalf of consistent target id mappings. If found, the 2723 * remote port structure will be reused. Otherwise, a new remote port 2724 * structure will be allocated. 2725 * 2726 * Whenever a remote port is allocated, a new fc_remote_port class 2727 * device is created. 2728 * 2729 * Should not be called from interrupt context. 2730 * 2731 * Notes: 2732 * This routine assumes no locks are held on entry. 2733 */ 2734 struct fc_rport * 2735 fc_remote_port_add(struct Scsi_Host *shost, int channel, 2736 struct fc_rport_identifiers *ids) 2737 { 2738 struct fc_internal *fci = to_fc_internal(shost->transportt); 2739 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2740 struct fc_rport *rport; 2741 unsigned long flags; 2742 int match = 0; 2743 2744 /* ensure any stgt delete functions are done */ 2745 fc_flush_work(shost); 2746 2747 /* 2748 * Search the list of "active" rports, for an rport that has been 2749 * deleted, but we've held off the real delete while the target 2750 * is in a "blocked" state. 2751 */ 2752 spin_lock_irqsave(shost->host_lock, flags); 2753 2754 list_for_each_entry(rport, &fc_host->rports, peers) { 2755 2756 if ((rport->port_state == FC_PORTSTATE_BLOCKED) && 2757 (rport->channel == channel)) { 2758 2759 switch (fc_host->tgtid_bind_type) { 2760 case FC_TGTID_BIND_BY_WWPN: 2761 case FC_TGTID_BIND_NONE: 2762 if (rport->port_name == ids->port_name) 2763 match = 1; 2764 break; 2765 case FC_TGTID_BIND_BY_WWNN: 2766 if (rport->node_name == ids->node_name) 2767 match = 1; 2768 break; 2769 case FC_TGTID_BIND_BY_ID: 2770 if (rport->port_id == ids->port_id) 2771 match = 1; 2772 break; 2773 } 2774 2775 if (match) { 2776 2777 memcpy(&rport->node_name, &ids->node_name, 2778 sizeof(rport->node_name)); 2779 memcpy(&rport->port_name, &ids->port_name, 2780 sizeof(rport->port_name)); 2781 rport->port_id = ids->port_id; 2782 2783 rport->port_state = FC_PORTSTATE_ONLINE; 2784 rport->roles = ids->roles; 2785 2786 spin_unlock_irqrestore(shost->host_lock, flags); 2787 2788 if (fci->f->dd_fcrport_size) 2789 memset(rport->dd_data, 0, 2790 fci->f->dd_fcrport_size); 2791 2792 /* 2793 * If we were not a target, cancel the 2794 * io terminate and rport timers, and 2795 * we're done. 2796 * 2797 * If we were a target, but our new role 2798 * doesn't indicate a target, leave the 2799 * timers running expecting the role to 2800 * change as the target fully logs in. If 2801 * it doesn't, the target will be torn down. 2802 * 2803 * If we were a target, and our role shows 2804 * we're still a target, cancel the timers 2805 * and kick off a scan. 2806 */ 2807 2808 /* was a target, not in roles */ 2809 if ((rport->scsi_target_id != -1) && 2810 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2811 return rport; 2812 2813 /* 2814 * Stop the fail io and dev_loss timers. 2815 * If they flush, the port_state will 2816 * be checked and will NOOP the function. 2817 */ 2818 if (!cancel_delayed_work(&rport->fail_io_work)) 2819 fc_flush_devloss(shost); 2820 if (!cancel_delayed_work(&rport->dev_loss_work)) 2821 fc_flush_devloss(shost); 2822 2823 spin_lock_irqsave(shost->host_lock, flags); 2824 2825 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2826 FC_RPORT_DEVLOSS_PENDING | 2827 FC_RPORT_DEVLOSS_CALLBK_DONE); 2828 2829 spin_unlock_irqrestore(shost->host_lock, flags); 2830 2831 /* if target, initiate a scan */ 2832 if (rport->scsi_target_id != -1) { 2833 scsi_target_unblock(&rport->dev, 2834 SDEV_RUNNING); 2835 spin_lock_irqsave(shost->host_lock, 2836 flags); 2837 rport->flags |= FC_RPORT_SCAN_PENDING; 2838 scsi_queue_work(shost, 2839 &rport->scan_work); 2840 spin_unlock_irqrestore(shost->host_lock, 2841 flags); 2842 } 2843 2844 fc_bsg_goose_queue(rport); 2845 2846 return rport; 2847 } 2848 } 2849 } 2850 2851 /* 2852 * Search the bindings array 2853 * Note: if never a FCP target, you won't be on this list 2854 */ 2855 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2856 2857 /* search for a matching consistent binding */ 2858 2859 list_for_each_entry(rport, &fc_host->rport_bindings, 2860 peers) { 2861 if (rport->channel != channel) 2862 continue; 2863 2864 switch (fc_host->tgtid_bind_type) { 2865 case FC_TGTID_BIND_BY_WWPN: 2866 if (rport->port_name == ids->port_name) 2867 match = 1; 2868 break; 2869 case FC_TGTID_BIND_BY_WWNN: 2870 if (rport->node_name == ids->node_name) 2871 match = 1; 2872 break; 2873 case FC_TGTID_BIND_BY_ID: 2874 if (rport->port_id == ids->port_id) 2875 match = 1; 2876 break; 2877 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2878 break; 2879 } 2880 2881 if (match) { 2882 list_move_tail(&rport->peers, &fc_host->rports); 2883 break; 2884 } 2885 } 2886 2887 if (match) { 2888 memcpy(&rport->node_name, &ids->node_name, 2889 sizeof(rport->node_name)); 2890 memcpy(&rport->port_name, &ids->port_name, 2891 sizeof(rport->port_name)); 2892 rport->port_id = ids->port_id; 2893 rport->roles = ids->roles; 2894 rport->port_state = FC_PORTSTATE_ONLINE; 2895 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2896 2897 if (fci->f->dd_fcrport_size) 2898 memset(rport->dd_data, 0, 2899 fci->f->dd_fcrport_size); 2900 spin_unlock_irqrestore(shost->host_lock, flags); 2901 2902 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) { 2903 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 2904 2905 /* initiate a scan of the target */ 2906 spin_lock_irqsave(shost->host_lock, flags); 2907 rport->flags |= FC_RPORT_SCAN_PENDING; 2908 scsi_queue_work(shost, &rport->scan_work); 2909 spin_unlock_irqrestore(shost->host_lock, flags); 2910 } 2911 return rport; 2912 } 2913 } 2914 2915 spin_unlock_irqrestore(shost->host_lock, flags); 2916 2917 /* No consistent binding found - create new remote port entry */ 2918 rport = fc_remote_port_create(shost, channel, ids); 2919 2920 return rport; 2921 } 2922 EXPORT_SYMBOL(fc_remote_port_add); 2923 2924 2925 /** 2926 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2927 * @rport: The remote port that no longer exists 2928 * 2929 * The LLDD calls this routine to notify the transport that a remote 2930 * port is no longer part of the topology. Note: Although a port 2931 * may no longer be part of the topology, it may persist in the remote 2932 * ports displayed by the fc_host. We do this under 2 conditions: 2933 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2934 * This allows the port to temporarily disappear, then reappear without 2935 * disrupting the SCSI device tree attached to it. During the "blocked" 2936 * period the port will still exist. 2937 * 2) If the port was a scsi target and disappears for longer than we 2938 * expect, we'll delete the port and the tear down the SCSI device tree 2939 * attached to it. However, we want to semi-persist the target id assigned 2940 * to that port if it eventually does exist. The port structure will 2941 * remain (although with minimal information) so that the target id 2942 * bindings remails. 2943 * 2944 * If the remote port is not an FCP Target, it will be fully torn down 2945 * and deallocated, including the fc_remote_port class device. 2946 * 2947 * If the remote port is an FCP Target, the port will be placed in a 2948 * temporary blocked state. From the LLDD's perspective, the rport no 2949 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2950 * exists, but all sdevs on it are blocked from further I/O. The following 2951 * is then expected. 2952 * 2953 * If the remote port does not return (signaled by a LLDD call to 2954 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2955 * scsi target is removed - killing all outstanding i/o and removing the 2956 * scsi devices attached ot it. The port structure will be marked Not 2957 * Present and be partially cleared, leaving only enough information to 2958 * recognize the remote port relative to the scsi target id binding if 2959 * it later appears. The port will remain as long as there is a valid 2960 * binding (e.g. until the user changes the binding type or unloads the 2961 * scsi host with the binding). 2962 * 2963 * If the remote port returns within the dev_loss_tmo value (and matches 2964 * according to the target id binding type), the port structure will be 2965 * reused. If it is no longer a SCSI target, the target will be torn 2966 * down. If it continues to be a SCSI target, then the target will be 2967 * unblocked (allowing i/o to be resumed), and a scan will be activated 2968 * to ensure that all luns are detected. 2969 * 2970 * Called from normal process context only - cannot be called from interrupt. 2971 * 2972 * Notes: 2973 * This routine assumes no locks are held on entry. 2974 */ 2975 void 2976 fc_remote_port_delete(struct fc_rport *rport) 2977 { 2978 struct Scsi_Host *shost = rport_to_shost(rport); 2979 unsigned long timeout = rport->dev_loss_tmo; 2980 unsigned long flags; 2981 2982 /* 2983 * No need to flush the fc_host work_q's, as all adds are synchronous. 2984 * 2985 * We do need to reclaim the rport scan work element, so eventually 2986 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2987 * there's still a scan pending. 2988 */ 2989 2990 spin_lock_irqsave(shost->host_lock, flags); 2991 2992 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2993 spin_unlock_irqrestore(shost->host_lock, flags); 2994 return; 2995 } 2996 2997 /* 2998 * In the past, we if this was not an FCP-Target, we would 2999 * unconditionally just jump to deleting the rport. 3000 * However, rports can be used as node containers by the LLDD, 3001 * and its not appropriate to just terminate the rport at the 3002 * first sign of a loss in connectivity. The LLDD may want to 3003 * send ELS traffic to re-validate the login. If the rport is 3004 * immediately deleted, it makes it inappropriate for a node 3005 * container. 3006 * So... we now unconditionally wait dev_loss_tmo before 3007 * destroying an rport. 3008 */ 3009 3010 rport->port_state = FC_PORTSTATE_BLOCKED; 3011 3012 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3013 3014 spin_unlock_irqrestore(shost->host_lock, flags); 3015 3016 scsi_target_block(&rport->dev); 3017 3018 /* see if we need to kill io faster than waiting for device loss */ 3019 if ((rport->fast_io_fail_tmo != -1) && 3020 (rport->fast_io_fail_tmo < timeout)) 3021 fc_queue_devloss_work(shost, &rport->fail_io_work, 3022 rport->fast_io_fail_tmo * HZ); 3023 3024 /* cap the length the devices can be blocked until they are deleted */ 3025 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3026 } 3027 EXPORT_SYMBOL(fc_remote_port_delete); 3028 3029 /** 3030 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3031 * @rport: The remote port that changed. 3032 * @roles: New roles for this port. 3033 * 3034 * Description: The LLDD calls this routine to notify the transport that the 3035 * roles on a remote port may have changed. The largest effect of this is 3036 * if a port now becomes a FCP Target, it must be allocated a 3037 * scsi target id. If the port is no longer a FCP target, any 3038 * scsi target id value assigned to it will persist in case the 3039 * role changes back to include FCP Target. No changes in the scsi 3040 * midlayer will be invoked if the role changes (in the expectation 3041 * that the role will be resumed. If it doesn't normal error processing 3042 * will take place). 3043 * 3044 * Should not be called from interrupt context. 3045 * 3046 * Notes: 3047 * This routine assumes no locks are held on entry. 3048 */ 3049 void 3050 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3051 { 3052 struct Scsi_Host *shost = rport_to_shost(rport); 3053 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3054 unsigned long flags; 3055 int create = 0; 3056 3057 spin_lock_irqsave(shost->host_lock, flags); 3058 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3059 if (rport->scsi_target_id == -1) { 3060 rport->scsi_target_id = fc_host->next_target_id++; 3061 create = 1; 3062 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3063 create = 1; 3064 } 3065 3066 rport->roles = roles; 3067 3068 spin_unlock_irqrestore(shost->host_lock, flags); 3069 3070 if (create) { 3071 /* 3072 * There may have been a delete timer running on the 3073 * port. Ensure that it is cancelled as we now know 3074 * the port is an FCP Target. 3075 * Note: we know the rport is exists and in an online 3076 * state as the LLDD would not have had an rport 3077 * reference to pass us. 3078 * 3079 * Take no action on the del_timer failure as the state 3080 * machine state change will validate the 3081 * transaction. 3082 */ 3083 if (!cancel_delayed_work(&rport->fail_io_work)) 3084 fc_flush_devloss(shost); 3085 if (!cancel_delayed_work(&rport->dev_loss_work)) 3086 fc_flush_devloss(shost); 3087 3088 spin_lock_irqsave(shost->host_lock, flags); 3089 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3090 FC_RPORT_DEVLOSS_PENDING | 3091 FC_RPORT_DEVLOSS_CALLBK_DONE); 3092 spin_unlock_irqrestore(shost->host_lock, flags); 3093 3094 /* ensure any stgt delete functions are done */ 3095 fc_flush_work(shost); 3096 3097 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3098 /* initiate a scan of the target */ 3099 spin_lock_irqsave(shost->host_lock, flags); 3100 rport->flags |= FC_RPORT_SCAN_PENDING; 3101 scsi_queue_work(shost, &rport->scan_work); 3102 spin_unlock_irqrestore(shost->host_lock, flags); 3103 } 3104 } 3105 EXPORT_SYMBOL(fc_remote_port_rolechg); 3106 3107 /** 3108 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3109 * @work: rport target that failed to reappear in the allotted time. 3110 * 3111 * Description: An attempt to delete a remote port blocks, and if it fails 3112 * to return in the allotted time this gets called. 3113 */ 3114 static void 3115 fc_timeout_deleted_rport(struct work_struct *work) 3116 { 3117 struct fc_rport *rport = 3118 container_of(work, struct fc_rport, dev_loss_work.work); 3119 struct Scsi_Host *shost = rport_to_shost(rport); 3120 struct fc_internal *i = to_fc_internal(shost->transportt); 3121 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3122 unsigned long flags; 3123 int do_callback = 0; 3124 3125 spin_lock_irqsave(shost->host_lock, flags); 3126 3127 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3128 3129 /* 3130 * If the port is ONLINE, then it came back. If it was a SCSI 3131 * target, validate it still is. If not, tear down the 3132 * scsi_target on it. 3133 */ 3134 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3135 (rport->scsi_target_id != -1) && 3136 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3137 dev_printk(KERN_ERR, &rport->dev, 3138 "blocked FC remote port time out: no longer" 3139 " a FCP target, removing starget\n"); 3140 spin_unlock_irqrestore(shost->host_lock, flags); 3141 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3142 fc_queue_work(shost, &rport->stgt_delete_work); 3143 return; 3144 } 3145 3146 /* NOOP state - we're flushing workq's */ 3147 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3148 spin_unlock_irqrestore(shost->host_lock, flags); 3149 dev_printk(KERN_ERR, &rport->dev, 3150 "blocked FC remote port time out: leaving" 3151 " rport%s alone\n", 3152 (rport->scsi_target_id != -1) ? " and starget" : ""); 3153 return; 3154 } 3155 3156 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3157 (rport->scsi_target_id == -1)) { 3158 list_del(&rport->peers); 3159 rport->port_state = FC_PORTSTATE_DELETED; 3160 dev_printk(KERN_ERR, &rport->dev, 3161 "blocked FC remote port time out: removing" 3162 " rport%s\n", 3163 (rport->scsi_target_id != -1) ? " and starget" : ""); 3164 fc_queue_work(shost, &rport->rport_delete_work); 3165 spin_unlock_irqrestore(shost->host_lock, flags); 3166 return; 3167 } 3168 3169 dev_printk(KERN_ERR, &rport->dev, 3170 "blocked FC remote port time out: removing target and " 3171 "saving binding\n"); 3172 3173 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3174 3175 /* 3176 * Note: We do not remove or clear the hostdata area. This allows 3177 * host-specific target data to persist along with the 3178 * scsi_target_id. It's up to the host to manage it's hostdata area. 3179 */ 3180 3181 /* 3182 * Reinitialize port attributes that may change if the port comes back. 3183 */ 3184 rport->maxframe_size = -1; 3185 rport->supported_classes = FC_COS_UNSPECIFIED; 3186 rport->roles = FC_PORT_ROLE_UNKNOWN; 3187 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3188 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3189 3190 /* 3191 * Pre-emptively kill I/O rather than waiting for the work queue 3192 * item to teardown the starget. (FCOE libFC folks prefer this 3193 * and to have the rport_port_id still set when it's done). 3194 */ 3195 spin_unlock_irqrestore(shost->host_lock, flags); 3196 fc_terminate_rport_io(rport); 3197 3198 spin_lock_irqsave(shost->host_lock, flags); 3199 3200 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3201 3202 /* remove the identifiers that aren't used in the consisting binding */ 3203 switch (fc_host->tgtid_bind_type) { 3204 case FC_TGTID_BIND_BY_WWPN: 3205 rport->node_name = -1; 3206 rport->port_id = -1; 3207 break; 3208 case FC_TGTID_BIND_BY_WWNN: 3209 rport->port_name = -1; 3210 rport->port_id = -1; 3211 break; 3212 case FC_TGTID_BIND_BY_ID: 3213 rport->node_name = -1; 3214 rport->port_name = -1; 3215 break; 3216 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3217 break; 3218 } 3219 3220 /* 3221 * As this only occurs if the remote port (scsi target) 3222 * went away and didn't come back - we'll remove 3223 * all attached scsi devices. 3224 */ 3225 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3226 fc_queue_work(shost, &rport->stgt_delete_work); 3227 3228 do_callback = 1; 3229 } 3230 3231 spin_unlock_irqrestore(shost->host_lock, flags); 3232 3233 /* 3234 * Notify the driver that the rport is now dead. The LLDD will 3235 * also guarantee that any communication to the rport is terminated 3236 * 3237 * Note: we set the CALLBK_DONE flag above to correspond 3238 */ 3239 if (do_callback && i->f->dev_loss_tmo_callbk) 3240 i->f->dev_loss_tmo_callbk(rport); 3241 } 3242 3243 3244 /** 3245 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3246 * @work: rport to terminate io on. 3247 * 3248 * Notes: Only requests the failure of the io, not that all are flushed 3249 * prior to returning. 3250 */ 3251 static void 3252 fc_timeout_fail_rport_io(struct work_struct *work) 3253 { 3254 struct fc_rport *rport = 3255 container_of(work, struct fc_rport, fail_io_work.work); 3256 3257 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3258 return; 3259 3260 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3261 fc_terminate_rport_io(rport); 3262 } 3263 3264 /** 3265 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3266 * @work: remote port to be scanned. 3267 */ 3268 static void 3269 fc_scsi_scan_rport(struct work_struct *work) 3270 { 3271 struct fc_rport *rport = 3272 container_of(work, struct fc_rport, scan_work); 3273 struct Scsi_Host *shost = rport_to_shost(rport); 3274 struct fc_internal *i = to_fc_internal(shost->transportt); 3275 unsigned long flags; 3276 3277 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3278 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3279 !(i->f->disable_target_scan)) { 3280 scsi_scan_target(&rport->dev, rport->channel, 3281 rport->scsi_target_id, SCAN_WILD_CARD, 3282 SCSI_SCAN_RESCAN); 3283 } 3284 3285 spin_lock_irqsave(shost->host_lock, flags); 3286 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3287 spin_unlock_irqrestore(shost->host_lock, flags); 3288 } 3289 3290 /** 3291 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3292 * @cmnd: SCSI command that scsi_eh is trying to recover 3293 * 3294 * This routine can be called from a FC LLD scsi_eh callback. It 3295 * blocks the scsi_eh thread until the fc_rport leaves the 3296 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3297 * necessary to avoid the scsi_eh failing recovery actions for blocked 3298 * rports which would lead to offlined SCSI devices. 3299 * 3300 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3301 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3302 * passed back to scsi_eh. 3303 */ 3304 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3305 { 3306 struct Scsi_Host *shost = cmnd->device->host; 3307 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3308 unsigned long flags; 3309 3310 spin_lock_irqsave(shost->host_lock, flags); 3311 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3312 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3313 spin_unlock_irqrestore(shost->host_lock, flags); 3314 msleep(1000); 3315 spin_lock_irqsave(shost->host_lock, flags); 3316 } 3317 spin_unlock_irqrestore(shost->host_lock, flags); 3318 3319 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3320 return FAST_IO_FAIL; 3321 3322 return 0; 3323 } 3324 EXPORT_SYMBOL(fc_block_scsi_eh); 3325 3326 /** 3327 * fc_vport_setup - allocates and creates a FC virtual port. 3328 * @shost: scsi host the virtual port is connected to. 3329 * @channel: Channel on shost port connected to. 3330 * @pdev: parent device for vport 3331 * @ids: The world wide names, FC4 port roles, etc for 3332 * the virtual port. 3333 * @ret_vport: The pointer to the created vport. 3334 * 3335 * Allocates and creates the vport structure, calls the parent host 3336 * to instantiate the vport, the completes w/ class and sysfs creation. 3337 * 3338 * Notes: 3339 * This routine assumes no locks are held on entry. 3340 */ 3341 static int 3342 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3343 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3344 { 3345 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3346 struct fc_internal *fci = to_fc_internal(shost->transportt); 3347 struct fc_vport *vport; 3348 struct device *dev; 3349 unsigned long flags; 3350 size_t size; 3351 int error; 3352 3353 *ret_vport = NULL; 3354 3355 if ( ! fci->f->vport_create) 3356 return -ENOENT; 3357 3358 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3359 vport = kzalloc(size, GFP_KERNEL); 3360 if (unlikely(!vport)) { 3361 printk(KERN_ERR "%s: allocation failure\n", __func__); 3362 return -ENOMEM; 3363 } 3364 3365 vport->vport_state = FC_VPORT_UNKNOWN; 3366 vport->vport_last_state = FC_VPORT_UNKNOWN; 3367 vport->node_name = ids->node_name; 3368 vport->port_name = ids->port_name; 3369 vport->roles = ids->roles; 3370 vport->vport_type = ids->vport_type; 3371 if (fci->f->dd_fcvport_size) 3372 vport->dd_data = &vport[1]; 3373 vport->shost = shost; 3374 vport->channel = channel; 3375 vport->flags = FC_VPORT_CREATING; 3376 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3377 3378 spin_lock_irqsave(shost->host_lock, flags); 3379 3380 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3381 spin_unlock_irqrestore(shost->host_lock, flags); 3382 kfree(vport); 3383 return -ENOSPC; 3384 } 3385 fc_host->npiv_vports_inuse++; 3386 vport->number = fc_host->next_vport_number++; 3387 list_add_tail(&vport->peers, &fc_host->vports); 3388 scsi_host_get(shost); /* for fc_host->vport list */ 3389 3390 spin_unlock_irqrestore(shost->host_lock, flags); 3391 3392 dev = &vport->dev; 3393 device_initialize(dev); /* takes self reference */ 3394 dev->parent = get_device(pdev); /* takes parent reference */ 3395 dev->release = fc_vport_dev_release; 3396 dev_set_name(dev, "vport-%d:%d-%d", 3397 shost->host_no, channel, vport->number); 3398 transport_setup_device(dev); 3399 3400 error = device_add(dev); 3401 if (error) { 3402 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3403 goto delete_vport; 3404 } 3405 transport_add_device(dev); 3406 transport_configure_device(dev); 3407 3408 error = fci->f->vport_create(vport, ids->disable); 3409 if (error) { 3410 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3411 goto delete_vport_all; 3412 } 3413 3414 /* 3415 * if the parent isn't the physical adapter's Scsi_Host, ensure 3416 * the Scsi_Host at least contains ia symlink to the vport. 3417 */ 3418 if (pdev != &shost->shost_gendev) { 3419 error = sysfs_create_link(&shost->shost_gendev.kobj, 3420 &dev->kobj, dev_name(dev)); 3421 if (error) 3422 printk(KERN_ERR 3423 "%s: Cannot create vport symlinks for " 3424 "%s, err=%d\n", 3425 __func__, dev_name(dev), error); 3426 } 3427 spin_lock_irqsave(shost->host_lock, flags); 3428 vport->flags &= ~FC_VPORT_CREATING; 3429 spin_unlock_irqrestore(shost->host_lock, flags); 3430 3431 dev_printk(KERN_NOTICE, pdev, 3432 "%s created via shost%d channel %d\n", dev_name(dev), 3433 shost->host_no, channel); 3434 3435 *ret_vport = vport; 3436 3437 return 0; 3438 3439 delete_vport_all: 3440 transport_remove_device(dev); 3441 device_del(dev); 3442 delete_vport: 3443 transport_destroy_device(dev); 3444 spin_lock_irqsave(shost->host_lock, flags); 3445 list_del(&vport->peers); 3446 scsi_host_put(shost); /* for fc_host->vport list */ 3447 fc_host->npiv_vports_inuse--; 3448 spin_unlock_irqrestore(shost->host_lock, flags); 3449 put_device(dev->parent); 3450 kfree(vport); 3451 3452 return error; 3453 } 3454 3455 /** 3456 * fc_vport_create - Admin App or LLDD requests creation of a vport 3457 * @shost: scsi host the virtual port is connected to. 3458 * @channel: channel on shost port connected to. 3459 * @ids: The world wide names, FC4 port roles, etc for 3460 * the virtual port. 3461 * 3462 * Notes: 3463 * This routine assumes no locks are held on entry. 3464 */ 3465 struct fc_vport * 3466 fc_vport_create(struct Scsi_Host *shost, int channel, 3467 struct fc_vport_identifiers *ids) 3468 { 3469 int stat; 3470 struct fc_vport *vport; 3471 3472 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3473 ids, &vport); 3474 return stat ? NULL : vport; 3475 } 3476 EXPORT_SYMBOL(fc_vport_create); 3477 3478 /** 3479 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3480 * @vport: fc_vport to be terminated 3481 * 3482 * Calls the LLDD vport_delete() function, then deallocates and removes 3483 * the vport from the shost and object tree. 3484 * 3485 * Notes: 3486 * This routine assumes no locks are held on entry. 3487 */ 3488 int 3489 fc_vport_terminate(struct fc_vport *vport) 3490 { 3491 struct Scsi_Host *shost = vport_to_shost(vport); 3492 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3493 struct fc_internal *i = to_fc_internal(shost->transportt); 3494 struct device *dev = &vport->dev; 3495 unsigned long flags; 3496 int stat; 3497 3498 if (i->f->vport_delete) 3499 stat = i->f->vport_delete(vport); 3500 else 3501 stat = -ENOENT; 3502 3503 spin_lock_irqsave(shost->host_lock, flags); 3504 vport->flags &= ~FC_VPORT_DELETING; 3505 if (!stat) { 3506 vport->flags |= FC_VPORT_DELETED; 3507 list_del(&vport->peers); 3508 fc_host->npiv_vports_inuse--; 3509 scsi_host_put(shost); /* for fc_host->vport list */ 3510 } 3511 spin_unlock_irqrestore(shost->host_lock, flags); 3512 3513 if (stat) 3514 return stat; 3515 3516 if (dev->parent != &shost->shost_gendev) 3517 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3518 transport_remove_device(dev); 3519 device_del(dev); 3520 transport_destroy_device(dev); 3521 3522 /* 3523 * Removing our self-reference should mean our 3524 * release function gets called, which will drop the remaining 3525 * parent reference and free the data structure. 3526 */ 3527 put_device(dev); /* for self-reference */ 3528 3529 return 0; /* SUCCESS */ 3530 } 3531 EXPORT_SYMBOL(fc_vport_terminate); 3532 3533 /** 3534 * fc_vport_sched_delete - workq-based delete request for a vport 3535 * @work: vport to be deleted. 3536 */ 3537 static void 3538 fc_vport_sched_delete(struct work_struct *work) 3539 { 3540 struct fc_vport *vport = 3541 container_of(work, struct fc_vport, vport_delete_work); 3542 int stat; 3543 3544 stat = fc_vport_terminate(vport); 3545 if (stat) 3546 dev_printk(KERN_ERR, vport->dev.parent, 3547 "%s: %s could not be deleted created via " 3548 "shost%d channel %d - error %d\n", __func__, 3549 dev_name(&vport->dev), vport->shost->host_no, 3550 vport->channel, stat); 3551 } 3552 3553 3554 /* 3555 * BSG support 3556 */ 3557 3558 /** 3559 * fc_bsg_job_timeout - handler for when a bsg request timesout 3560 * @req: request that timed out 3561 */ 3562 static enum blk_eh_timer_return 3563 fc_bsg_job_timeout(struct request *req) 3564 { 3565 struct bsg_job *job = (void *) req->special; 3566 struct Scsi_Host *shost = fc_bsg_to_shost(job); 3567 struct fc_rport *rport = fc_bsg_to_rport(job); 3568 struct fc_internal *i = to_fc_internal(shost->transportt); 3569 int err = 0, inflight = 0; 3570 3571 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) 3572 return BLK_EH_RESET_TIMER; 3573 3574 inflight = bsg_job_get(job); 3575 3576 if (inflight && i->f->bsg_timeout) { 3577 /* call LLDD to abort the i/o as it has timed out */ 3578 err = i->f->bsg_timeout(job); 3579 if (err == -EAGAIN) { 3580 bsg_job_put(job); 3581 return BLK_EH_RESET_TIMER; 3582 } else if (err) 3583 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3584 "abort failed with status %d\n", err); 3585 } 3586 3587 /* the blk_end_sync_io() doesn't check the error */ 3588 if (!inflight) 3589 return BLK_EH_NOT_HANDLED; 3590 else 3591 return BLK_EH_HANDLED; 3592 } 3593 3594 /** 3595 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3596 * @shost: scsi host rport attached to 3597 * @job: bsg job to be processed 3598 */ 3599 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 3600 { 3601 struct fc_internal *i = to_fc_internal(shost->transportt); 3602 struct fc_bsg_request *bsg_request = job->request; 3603 struct fc_bsg_reply *bsg_reply = job->reply; 3604 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3605 int ret; 3606 3607 /* check if we really have all the request data needed */ 3608 if (job->request_len < cmdlen) { 3609 ret = -ENOMSG; 3610 goto fail_host_msg; 3611 } 3612 3613 /* Validate the host command */ 3614 switch (bsg_request->msgcode) { 3615 case FC_BSG_HST_ADD_RPORT: 3616 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3617 break; 3618 3619 case FC_BSG_HST_DEL_RPORT: 3620 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3621 break; 3622 3623 case FC_BSG_HST_ELS_NOLOGIN: 3624 cmdlen += sizeof(struct fc_bsg_host_els); 3625 /* there better be a xmt and rcv payloads */ 3626 if ((!job->request_payload.payload_len) || 3627 (!job->reply_payload.payload_len)) { 3628 ret = -EINVAL; 3629 goto fail_host_msg; 3630 } 3631 break; 3632 3633 case FC_BSG_HST_CT: 3634 cmdlen += sizeof(struct fc_bsg_host_ct); 3635 /* there better be xmt and rcv payloads */ 3636 if ((!job->request_payload.payload_len) || 3637 (!job->reply_payload.payload_len)) { 3638 ret = -EINVAL; 3639 goto fail_host_msg; 3640 } 3641 break; 3642 3643 case FC_BSG_HST_VENDOR: 3644 cmdlen += sizeof(struct fc_bsg_host_vendor); 3645 if ((shost->hostt->vendor_id == 0L) || 3646 (bsg_request->rqst_data.h_vendor.vendor_id != 3647 shost->hostt->vendor_id)) { 3648 ret = -ESRCH; 3649 goto fail_host_msg; 3650 } 3651 break; 3652 3653 default: 3654 ret = -EBADR; 3655 goto fail_host_msg; 3656 } 3657 3658 ret = i->f->bsg_request(job); 3659 if (!ret) 3660 return 0; 3661 3662 fail_host_msg: 3663 /* return the errno failure code as the only status */ 3664 BUG_ON(job->reply_len < sizeof(uint32_t)); 3665 bsg_reply->reply_payload_rcv_len = 0; 3666 bsg_reply->result = ret; 3667 job->reply_len = sizeof(uint32_t); 3668 bsg_job_done(job, bsg_reply->result, 3669 bsg_reply->reply_payload_rcv_len); 3670 return 0; 3671 } 3672 3673 3674 /* 3675 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3676 * @rport: rport to be restarted 3677 */ 3678 static void 3679 fc_bsg_goose_queue(struct fc_rport *rport) 3680 { 3681 struct request_queue *q = rport->rqst_q; 3682 unsigned long flags; 3683 3684 if (!q) 3685 return; 3686 3687 spin_lock_irqsave(q->queue_lock, flags); 3688 blk_run_queue_async(q); 3689 spin_unlock_irqrestore(q->queue_lock, flags); 3690 } 3691 3692 /** 3693 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3694 * @shost: scsi host rport attached to 3695 * @job: bsg job to be processed 3696 */ 3697 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 3698 { 3699 struct fc_internal *i = to_fc_internal(shost->transportt); 3700 struct fc_bsg_request *bsg_request = job->request; 3701 struct fc_bsg_reply *bsg_reply = job->reply; 3702 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3703 int ret; 3704 3705 /* check if we really have all the request data needed */ 3706 if (job->request_len < cmdlen) { 3707 ret = -ENOMSG; 3708 goto fail_rport_msg; 3709 } 3710 3711 /* Validate the rport command */ 3712 switch (bsg_request->msgcode) { 3713 case FC_BSG_RPT_ELS: 3714 cmdlen += sizeof(struct fc_bsg_rport_els); 3715 goto check_bidi; 3716 3717 case FC_BSG_RPT_CT: 3718 cmdlen += sizeof(struct fc_bsg_rport_ct); 3719 check_bidi: 3720 /* there better be xmt and rcv payloads */ 3721 if ((!job->request_payload.payload_len) || 3722 (!job->reply_payload.payload_len)) { 3723 ret = -EINVAL; 3724 goto fail_rport_msg; 3725 } 3726 break; 3727 default: 3728 ret = -EBADR; 3729 goto fail_rport_msg; 3730 } 3731 3732 ret = i->f->bsg_request(job); 3733 if (!ret) 3734 return 0; 3735 3736 fail_rport_msg: 3737 /* return the errno failure code as the only status */ 3738 BUG_ON(job->reply_len < sizeof(uint32_t)); 3739 bsg_reply->reply_payload_rcv_len = 0; 3740 bsg_reply->result = ret; 3741 job->reply_len = sizeof(uint32_t); 3742 bsg_job_done(job, bsg_reply->result, 3743 bsg_reply->reply_payload_rcv_len); 3744 return 0; 3745 } 3746 3747 static int fc_bsg_dispatch(struct bsg_job *job) 3748 { 3749 struct Scsi_Host *shost = fc_bsg_to_shost(job); 3750 3751 if (scsi_is_fc_rport(job->dev)) 3752 return fc_bsg_rport_dispatch(shost, job); 3753 else 3754 return fc_bsg_host_dispatch(shost, job); 3755 } 3756 3757 /** 3758 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 3759 * @shost: shost for fc_host 3760 * @fc_host: fc_host adding the structures to 3761 */ 3762 static int 3763 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 3764 { 3765 struct device *dev = &shost->shost_gendev; 3766 struct fc_internal *i = to_fc_internal(shost->transportt); 3767 struct request_queue *q; 3768 int err; 3769 char bsg_name[20]; 3770 3771 fc_host->rqst_q = NULL; 3772 3773 if (!i->f->bsg_request) 3774 return -ENOTSUPP; 3775 3776 snprintf(bsg_name, sizeof(bsg_name), 3777 "fc_host%d", shost->host_no); 3778 3779 q = __scsi_alloc_queue(shost, bsg_request_fn); 3780 if (!q) { 3781 dev_err(dev, 3782 "fc_host%d: bsg interface failed to initialize - no request queue\n", 3783 shost->host_no); 3784 return -ENOMEM; 3785 } 3786 3787 err = bsg_setup_queue(dev, q, bsg_name, fc_bsg_dispatch, 3788 i->f->dd_bsg_size); 3789 if (err) { 3790 dev_err(dev, 3791 "fc_host%d: bsg interface failed to initialize - setup queue\n", 3792 shost->host_no); 3793 blk_cleanup_queue(q); 3794 return err; 3795 } 3796 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 3797 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 3798 fc_host->rqst_q = q; 3799 return 0; 3800 } 3801 3802 static int fc_bsg_rport_prep(struct request_queue *q, struct request *req) 3803 { 3804 struct fc_rport *rport = dev_to_rport(q->queuedata); 3805 3806 if (rport->port_state == FC_PORTSTATE_BLOCKED && 3807 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3808 return BLKPREP_DEFER; 3809 3810 if (rport->port_state != FC_PORTSTATE_ONLINE) 3811 return BLKPREP_KILL; 3812 3813 return BLKPREP_OK; 3814 } 3815 3816 /** 3817 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 3818 * @shost: shost that rport is attached to 3819 * @rport: rport that the bsg hooks are being attached to 3820 */ 3821 static int 3822 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 3823 { 3824 struct device *dev = &rport->dev; 3825 struct fc_internal *i = to_fc_internal(shost->transportt); 3826 struct request_queue *q; 3827 int err; 3828 3829 rport->rqst_q = NULL; 3830 3831 if (!i->f->bsg_request) 3832 return -ENOTSUPP; 3833 3834 q = __scsi_alloc_queue(shost, bsg_request_fn); 3835 if (!q) { 3836 dev_err(dev, "bsg interface failed to initialize - no request queue\n"); 3837 return -ENOMEM; 3838 } 3839 3840 err = bsg_setup_queue(dev, q, NULL, fc_bsg_dispatch, i->f->dd_bsg_size); 3841 if (err) { 3842 dev_err(dev, "failed to setup bsg queue\n"); 3843 blk_cleanup_queue(q); 3844 return err; 3845 } 3846 3847 blk_queue_prep_rq(q, fc_bsg_rport_prep); 3848 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 3849 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 3850 rport->rqst_q = q; 3851 return 0; 3852 } 3853 3854 3855 /** 3856 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 3857 * @q: the request_queue that is to be torn down. 3858 * 3859 * Notes: 3860 * Before unregistering the queue empty any requests that are blocked 3861 * 3862 * 3863 */ 3864 static void 3865 fc_bsg_remove(struct request_queue *q) 3866 { 3867 if (q) { 3868 bsg_unregister_queue(q); 3869 blk_cleanup_queue(q); 3870 } 3871 } 3872 3873 3874 /* Original Author: Martin Hicks */ 3875 MODULE_AUTHOR("James Smart"); 3876 MODULE_DESCRIPTION("FC Transport Attributes"); 3877 MODULE_LICENSE("GPL"); 3878 3879 module_init(fc_transport_init); 3880 module_exit(fc_transport_exit); 3881