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