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_LINK_FPIN, "link_FPIN" }, 151 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 152 }; 153 fc_enum_name_search(host_event_code, fc_host_event_code, 154 fc_host_event_code_names) 155 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 156 157 158 /* Convert fc_port_state values to ascii string name */ 159 static struct { 160 enum fc_port_state value; 161 char *name; 162 } fc_port_state_names[] = { 163 { FC_PORTSTATE_UNKNOWN, "Unknown" }, 164 { FC_PORTSTATE_NOTPRESENT, "Not Present" }, 165 { FC_PORTSTATE_ONLINE, "Online" }, 166 { FC_PORTSTATE_OFFLINE, "Offline" }, 167 { FC_PORTSTATE_BLOCKED, "Blocked" }, 168 { FC_PORTSTATE_BYPASSED, "Bypassed" }, 169 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, 170 { FC_PORTSTATE_LINKDOWN, "Linkdown" }, 171 { FC_PORTSTATE_ERROR, "Error" }, 172 { FC_PORTSTATE_LOOPBACK, "Loopback" }, 173 { FC_PORTSTATE_DELETED, "Deleted" }, 174 }; 175 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 176 #define FC_PORTSTATE_MAX_NAMELEN 20 177 178 179 /* Convert fc_vport_state values to ascii string name */ 180 static struct { 181 enum fc_vport_state value; 182 char *name; 183 } fc_vport_state_names[] = { 184 { FC_VPORT_UNKNOWN, "Unknown" }, 185 { FC_VPORT_ACTIVE, "Active" }, 186 { FC_VPORT_DISABLED, "Disabled" }, 187 { FC_VPORT_LINKDOWN, "Linkdown" }, 188 { FC_VPORT_INITIALIZING, "Initializing" }, 189 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 190 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 191 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 192 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 193 { FC_VPORT_FAILED, "VPort Failed" }, 194 }; 195 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 196 #define FC_VPORTSTATE_MAX_NAMELEN 24 197 198 /* Reuse fc_vport_state enum function for vport_last_state */ 199 #define get_fc_vport_last_state_name get_fc_vport_state_name 200 201 202 /* Convert fc_tgtid_binding_type values to ascii string name */ 203 static const struct { 204 enum fc_tgtid_binding_type value; 205 char *name; 206 int matchlen; 207 } fc_tgtid_binding_type_names[] = { 208 { FC_TGTID_BIND_NONE, "none", 4 }, 209 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 210 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 211 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 212 }; 213 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 214 fc_tgtid_binding_type_names) 215 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 216 fc_tgtid_binding_type_names) 217 #define FC_BINDTYPE_MAX_NAMELEN 30 218 219 220 #define fc_bitfield_name_search(title, table) \ 221 static ssize_t \ 222 get_fc_##title##_names(u32 table_key, char *buf) \ 223 { \ 224 char *prefix = ""; \ 225 ssize_t len = 0; \ 226 int i; \ 227 \ 228 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 229 if (table[i].value & table_key) { \ 230 len += sprintf(buf + len, "%s%s", \ 231 prefix, table[i].name); \ 232 prefix = ", "; \ 233 } \ 234 } \ 235 len += sprintf(buf + len, "\n"); \ 236 return len; \ 237 } 238 239 240 /* Convert FC_COS bit values to ascii string name */ 241 static const struct { 242 u32 value; 243 char *name; 244 } fc_cos_names[] = { 245 { FC_COS_CLASS1, "Class 1" }, 246 { FC_COS_CLASS2, "Class 2" }, 247 { FC_COS_CLASS3, "Class 3" }, 248 { FC_COS_CLASS4, "Class 4" }, 249 { FC_COS_CLASS6, "Class 6" }, 250 }; 251 fc_bitfield_name_search(cos, fc_cos_names) 252 253 254 /* Convert FC_PORTSPEED bit values to ascii string name */ 255 static const struct { 256 u32 value; 257 char *name; 258 } fc_port_speed_names[] = { 259 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 260 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 261 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 262 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 263 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 264 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 265 { FC_PORTSPEED_32GBIT, "32 Gbit" }, 266 { FC_PORTSPEED_20GBIT, "20 Gbit" }, 267 { FC_PORTSPEED_40GBIT, "40 Gbit" }, 268 { FC_PORTSPEED_50GBIT, "50 Gbit" }, 269 { FC_PORTSPEED_100GBIT, "100 Gbit" }, 270 { FC_PORTSPEED_25GBIT, "25 Gbit" }, 271 { FC_PORTSPEED_64GBIT, "64 Gbit" }, 272 { FC_PORTSPEED_128GBIT, "128 Gbit" }, 273 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 274 }; 275 fc_bitfield_name_search(port_speed, fc_port_speed_names) 276 277 278 static int 279 show_fc_fc4s (char *buf, u8 *fc4_list) 280 { 281 int i, len=0; 282 283 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 284 len += sprintf(buf + len , "0x%02x ", *fc4_list); 285 len += sprintf(buf + len, "\n"); 286 return len; 287 } 288 289 290 /* Convert FC_PORT_ROLE bit values to ascii string name */ 291 static const struct { 292 u32 value; 293 char *name; 294 } fc_port_role_names[] = { 295 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 296 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 297 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 298 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" }, 299 { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" }, 300 { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" }, 301 { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" }, 302 }; 303 fc_bitfield_name_search(port_roles, fc_port_role_names) 304 305 /* 306 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 307 */ 308 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 309 #define FC_WELLKNOWN_ROLE_MASK 0x00000f 310 #define FC_FPORT_PORTID 0x00000e 311 #define FC_FABCTLR_PORTID 0x00000d 312 #define FC_DIRSRVR_PORTID 0x00000c 313 #define FC_TIMESRVR_PORTID 0x00000b 314 #define FC_MGMTSRVR_PORTID 0x00000a 315 316 317 static void fc_timeout_deleted_rport(struct work_struct *work); 318 static void fc_timeout_fail_rport_io(struct work_struct *work); 319 static void fc_scsi_scan_rport(struct work_struct *work); 320 321 /* 322 * Attribute counts pre object type... 323 * Increase these values if you add attributes 324 */ 325 #define FC_STARGET_NUM_ATTRS 3 326 #define FC_RPORT_NUM_ATTRS 10 327 #define FC_VPORT_NUM_ATTRS 9 328 #define FC_HOST_NUM_ATTRS 29 329 330 struct fc_internal { 331 struct scsi_transport_template t; 332 struct fc_function_template *f; 333 334 /* 335 * For attributes : each object has : 336 * An array of the actual attributes structures 337 * An array of null-terminated pointers to the attribute 338 * structures - used for mid-layer interaction. 339 * 340 * The attribute containers for the starget and host are are 341 * part of the midlayer. As the remote port is specific to the 342 * fc transport, we must provide the attribute container. 343 */ 344 struct device_attribute private_starget_attrs[ 345 FC_STARGET_NUM_ATTRS]; 346 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 347 348 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 349 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 350 351 struct transport_container rport_attr_cont; 352 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 353 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 354 355 struct transport_container vport_attr_cont; 356 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 357 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 358 }; 359 360 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 361 362 static int fc_target_setup(struct transport_container *tc, struct device *dev, 363 struct device *cdev) 364 { 365 struct scsi_target *starget = to_scsi_target(dev); 366 struct fc_rport *rport = starget_to_rport(starget); 367 368 /* 369 * if parent is remote port, use values from remote port. 370 * Otherwise, this host uses the fc_transport, but not the 371 * remote port interface. As such, initialize to known non-values. 372 */ 373 if (rport) { 374 fc_starget_node_name(starget) = rport->node_name; 375 fc_starget_port_name(starget) = rport->port_name; 376 fc_starget_port_id(starget) = rport->port_id; 377 } else { 378 fc_starget_node_name(starget) = -1; 379 fc_starget_port_name(starget) = -1; 380 fc_starget_port_id(starget) = -1; 381 } 382 383 return 0; 384 } 385 386 static DECLARE_TRANSPORT_CLASS(fc_transport_class, 387 "fc_transport", 388 fc_target_setup, 389 NULL, 390 NULL); 391 392 static int fc_host_setup(struct transport_container *tc, struct device *dev, 393 struct device *cdev) 394 { 395 struct Scsi_Host *shost = dev_to_shost(dev); 396 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 397 398 /* 399 * Set default values easily detected by the midlayer as 400 * failure cases. The scsi lldd is responsible for initializing 401 * all transport attributes to valid values per host. 402 */ 403 fc_host->node_name = -1; 404 fc_host->port_name = -1; 405 fc_host->permanent_port_name = -1; 406 fc_host->supported_classes = FC_COS_UNSPECIFIED; 407 memset(fc_host->supported_fc4s, 0, 408 sizeof(fc_host->supported_fc4s)); 409 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 410 fc_host->maxframe_size = -1; 411 fc_host->max_npiv_vports = 0; 412 memset(fc_host->serial_number, 0, 413 sizeof(fc_host->serial_number)); 414 memset(fc_host->manufacturer, 0, 415 sizeof(fc_host->manufacturer)); 416 memset(fc_host->model, 0, 417 sizeof(fc_host->model)); 418 memset(fc_host->model_description, 0, 419 sizeof(fc_host->model_description)); 420 memset(fc_host->hardware_version, 0, 421 sizeof(fc_host->hardware_version)); 422 memset(fc_host->driver_version, 0, 423 sizeof(fc_host->driver_version)); 424 memset(fc_host->firmware_version, 0, 425 sizeof(fc_host->firmware_version)); 426 memset(fc_host->optionrom_version, 0, 427 sizeof(fc_host->optionrom_version)); 428 429 fc_host->port_id = -1; 430 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 431 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 432 memset(fc_host->active_fc4s, 0, 433 sizeof(fc_host->active_fc4s)); 434 fc_host->speed = FC_PORTSPEED_UNKNOWN; 435 fc_host->fabric_name = -1; 436 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 437 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 438 439 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 440 441 INIT_LIST_HEAD(&fc_host->rports); 442 INIT_LIST_HEAD(&fc_host->rport_bindings); 443 INIT_LIST_HEAD(&fc_host->vports); 444 fc_host->next_rport_number = 0; 445 fc_host->next_target_id = 0; 446 fc_host->next_vport_number = 0; 447 fc_host->npiv_vports_inuse = 0; 448 449 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 450 "fc_wq_%d", shost->host_no); 451 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); 452 if (!fc_host->work_q) 453 return -ENOMEM; 454 455 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 456 snprintf(fc_host->devloss_work_q_name, 457 sizeof(fc_host->devloss_work_q_name), 458 "fc_dl_%d", shost->host_no); 459 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, 460 fc_host->devloss_work_q_name); 461 if (!fc_host->devloss_work_q) { 462 destroy_workqueue(fc_host->work_q); 463 fc_host->work_q = NULL; 464 return -ENOMEM; 465 } 466 467 fc_bsg_hostadd(shost, fc_host); 468 /* ignore any bsg add error - we just can't do sgio */ 469 470 return 0; 471 } 472 473 static int fc_host_remove(struct transport_container *tc, struct device *dev, 474 struct device *cdev) 475 { 476 struct Scsi_Host *shost = dev_to_shost(dev); 477 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 478 479 fc_bsg_remove(fc_host->rqst_q); 480 return 0; 481 } 482 483 static DECLARE_TRANSPORT_CLASS(fc_host_class, 484 "fc_host", 485 fc_host_setup, 486 fc_host_remove, 487 NULL); 488 489 /* 490 * Setup and Remove actions for remote ports are handled 491 * in the service functions below. 492 */ 493 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 494 "fc_remote_ports", 495 NULL, 496 NULL, 497 NULL); 498 499 /* 500 * Setup and Remove actions for virtual ports are handled 501 * in the service functions below. 502 */ 503 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 504 "fc_vports", 505 NULL, 506 NULL, 507 NULL); 508 509 /* 510 * Netlink Infrastructure 511 */ 512 513 static atomic_t fc_event_seq; 514 515 /** 516 * fc_get_event_number - Obtain the next sequential FC event number 517 * 518 * Notes: 519 * We could have inlined this, but it would have required fc_event_seq to 520 * be exposed. For now, live with the subroutine call. 521 * Atomic used to avoid lock/unlock... 522 */ 523 u32 524 fc_get_event_number(void) 525 { 526 return atomic_add_return(1, &fc_event_seq); 527 } 528 EXPORT_SYMBOL(fc_get_event_number); 529 530 /** 531 * fc_host_post_fc_event - routine to do the work of posting an event 532 * on an fc_host. 533 * @shost: host the event occurred on 534 * @event_number: fc event number obtained from get_fc_event_number() 535 * @event_code: fc_host event being posted 536 * @data_len: amount, in bytes, of event data 537 * @data_buf: pointer to event data 538 * @vendor_id: value for Vendor id 539 * 540 * Notes: 541 * This routine assumes no locks are held on entry. 542 */ 543 void 544 fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number, 545 enum fc_host_event_code event_code, 546 u32 data_len, char *data_buf, u64 vendor_id) 547 { 548 struct sk_buff *skb; 549 struct nlmsghdr *nlh; 550 struct fc_nl_event *event; 551 const char *name; 552 u32 len; 553 int err; 554 555 if (!data_buf || data_len < 4) 556 data_len = 0; 557 558 if (!scsi_nl_sock) { 559 err = -ENOENT; 560 goto send_fail; 561 } 562 563 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 564 565 skb = nlmsg_new(len, GFP_KERNEL); 566 if (!skb) { 567 err = -ENOBUFS; 568 goto send_fail; 569 } 570 571 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 572 if (!nlh) { 573 err = -ENOBUFS; 574 goto send_fail_skb; 575 } 576 event = nlmsg_data(nlh); 577 578 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 579 FC_NL_ASYNC_EVENT, len); 580 event->seconds = ktime_get_real_seconds(); 581 event->vendor_id = vendor_id; 582 event->host_no = shost->host_no; 583 event->event_datalen = data_len; /* bytes */ 584 event->event_num = event_number; 585 event->event_code = event_code; 586 if (data_len) 587 memcpy(&event->event_data, data_buf, data_len); 588 589 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 590 GFP_KERNEL); 591 return; 592 593 send_fail_skb: 594 kfree_skb(skb); 595 send_fail: 596 name = get_fc_host_event_code_name(event_code); 597 printk(KERN_WARNING 598 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 599 __func__, shost->host_no, 600 (name) ? name : "<unknown>", 601 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err); 602 return; 603 } 604 EXPORT_SYMBOL(fc_host_post_fc_event); 605 606 /** 607 * fc_host_post_event - called to post an even on an fc_host. 608 * @shost: host the event occurred on 609 * @event_number: fc event number obtained from get_fc_event_number() 610 * @event_code: fc_host event being posted 611 * @event_data: 32bits of data for the event being posted 612 * 613 * Notes: 614 * This routine assumes no locks are held on entry. 615 */ 616 void 617 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 618 enum fc_host_event_code event_code, u32 event_data) 619 { 620 fc_host_post_fc_event(shost, event_number, event_code, 621 (u32)sizeof(u32), (char *)&event_data, 0); 622 } 623 EXPORT_SYMBOL(fc_host_post_event); 624 625 626 /** 627 * fc_host_post_vendor_event - called to post a vendor unique event 628 * on an fc_host 629 * @shost: host the event occurred on 630 * @event_number: fc event number obtained from get_fc_event_number() 631 * @data_len: amount, in bytes, of vendor unique data 632 * @data_buf: pointer to vendor unique data 633 * @vendor_id: Vendor id 634 * 635 * Notes: 636 * This routine assumes no locks are held on entry. 637 */ 638 void 639 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 640 u32 data_len, char * data_buf, u64 vendor_id) 641 { 642 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE, 643 data_len, data_buf, vendor_id); 644 } 645 EXPORT_SYMBOL(fc_host_post_vendor_event); 646 647 /** 648 * fc_host_rcv_fpin - routine to process a received FPIN. 649 * @shost: host the FPIN was received on 650 * @fpin_len: length of FPIN payload, in bytes 651 * @fpin_buf: pointer to FPIN payload 652 * 653 * Notes: 654 * This routine assumes no locks are held on entry. 655 */ 656 void 657 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf) 658 { 659 fc_host_post_fc_event(shost, fc_get_event_number(), 660 FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0); 661 } 662 EXPORT_SYMBOL(fc_host_fpin_rcv); 663 664 665 static __init int fc_transport_init(void) 666 { 667 int error; 668 669 atomic_set(&fc_event_seq, 0); 670 671 error = transport_class_register(&fc_host_class); 672 if (error) 673 return error; 674 error = transport_class_register(&fc_vport_class); 675 if (error) 676 goto unreg_host_class; 677 error = transport_class_register(&fc_rport_class); 678 if (error) 679 goto unreg_vport_class; 680 error = transport_class_register(&fc_transport_class); 681 if (error) 682 goto unreg_rport_class; 683 return 0; 684 685 unreg_rport_class: 686 transport_class_unregister(&fc_rport_class); 687 unreg_vport_class: 688 transport_class_unregister(&fc_vport_class); 689 unreg_host_class: 690 transport_class_unregister(&fc_host_class); 691 return error; 692 } 693 694 static void __exit fc_transport_exit(void) 695 { 696 transport_class_unregister(&fc_transport_class); 697 transport_class_unregister(&fc_rport_class); 698 transport_class_unregister(&fc_host_class); 699 transport_class_unregister(&fc_vport_class); 700 } 701 702 /* 703 * FC Remote Port Attribute Management 704 */ 705 706 #define fc_rport_show_function(field, format_string, sz, cast) \ 707 static ssize_t \ 708 show_fc_rport_##field (struct device *dev, \ 709 struct device_attribute *attr, char *buf) \ 710 { \ 711 struct fc_rport *rport = transport_class_to_rport(dev); \ 712 struct Scsi_Host *shost = rport_to_shost(rport); \ 713 struct fc_internal *i = to_fc_internal(shost->transportt); \ 714 if ((i->f->get_rport_##field) && \ 715 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 716 (rport->port_state == FC_PORTSTATE_DELETED) || \ 717 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 718 i->f->get_rport_##field(rport); \ 719 return snprintf(buf, sz, format_string, cast rport->field); \ 720 } 721 722 #define fc_rport_store_function(field) \ 723 static ssize_t \ 724 store_fc_rport_##field(struct device *dev, \ 725 struct device_attribute *attr, \ 726 const char *buf, size_t count) \ 727 { \ 728 int val; \ 729 struct fc_rport *rport = transport_class_to_rport(dev); \ 730 struct Scsi_Host *shost = rport_to_shost(rport); \ 731 struct fc_internal *i = to_fc_internal(shost->transportt); \ 732 char *cp; \ 733 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 734 (rport->port_state == FC_PORTSTATE_DELETED) || \ 735 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 736 return -EBUSY; \ 737 val = simple_strtoul(buf, &cp, 0); \ 738 if (*cp && (*cp != '\n')) \ 739 return -EINVAL; \ 740 i->f->set_rport_##field(rport, val); \ 741 return count; \ 742 } 743 744 #define fc_rport_rd_attr(field, format_string, sz) \ 745 fc_rport_show_function(field, format_string, sz, ) \ 746 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 747 show_fc_rport_##field, NULL) 748 749 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 750 fc_rport_show_function(field, format_string, sz, (cast)) \ 751 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 752 show_fc_rport_##field, NULL) 753 754 #define fc_rport_rw_attr(field, format_string, sz) \ 755 fc_rport_show_function(field, format_string, sz, ) \ 756 fc_rport_store_function(field) \ 757 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 758 show_fc_rport_##field, \ 759 store_fc_rport_##field) 760 761 762 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 763 static ssize_t \ 764 show_fc_rport_##field (struct device *dev, \ 765 struct device_attribute *attr, char *buf) \ 766 { \ 767 struct fc_rport *rport = transport_class_to_rport(dev); \ 768 return snprintf(buf, sz, format_string, cast rport->field); \ 769 } 770 771 #define fc_private_rport_rd_attr(field, format_string, sz) \ 772 fc_private_rport_show_function(field, format_string, sz, ) \ 773 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 774 show_fc_rport_##field, NULL) 775 776 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 777 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 778 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 779 show_fc_rport_##field, NULL) 780 781 782 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 783 static ssize_t \ 784 show_fc_rport_##title (struct device *dev, \ 785 struct device_attribute *attr, char *buf) \ 786 { \ 787 struct fc_rport *rport = transport_class_to_rport(dev); \ 788 const char *name; \ 789 name = get_fc_##title##_name(rport->title); \ 790 if (!name) \ 791 return -EINVAL; \ 792 return snprintf(buf, maxlen, "%s\n", name); \ 793 } \ 794 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 795 show_fc_rport_##title, NULL) 796 797 798 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 799 i->private_rport_attrs[count] = device_attr_rport_##field; \ 800 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 801 i->private_rport_attrs[count].store = NULL; \ 802 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 803 if (i->f->show_rport_##field) \ 804 count++ 805 806 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 807 i->private_rport_attrs[count] = device_attr_rport_##field; \ 808 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 809 i->private_rport_attrs[count].store = NULL; \ 810 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 811 count++ 812 813 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 814 i->private_rport_attrs[count] = device_attr_rport_##field; \ 815 if (!i->f->set_rport_##field) { \ 816 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 817 i->private_rport_attrs[count].store = NULL; \ 818 } \ 819 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 820 if (i->f->show_rport_##field) \ 821 count++ 822 823 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 824 { \ 825 i->private_rport_attrs[count] = device_attr_rport_##field; \ 826 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 827 count++; \ 828 } 829 830 831 /* The FC Transport Remote Port Attributes: */ 832 833 /* Fixed Remote Port Attributes */ 834 835 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 836 837 static ssize_t 838 show_fc_rport_supported_classes (struct device *dev, 839 struct device_attribute *attr, char *buf) 840 { 841 struct fc_rport *rport = transport_class_to_rport(dev); 842 if (rport->supported_classes == FC_COS_UNSPECIFIED) 843 return snprintf(buf, 20, "unspecified\n"); 844 return get_fc_cos_names(rport->supported_classes, buf); 845 } 846 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 847 show_fc_rport_supported_classes, NULL); 848 849 /* Dynamic Remote Port Attributes */ 850 851 /* 852 * dev_loss_tmo attribute 853 */ 854 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 855 { 856 char *cp; 857 858 *val = simple_strtoul(buf, &cp, 0); 859 if (*cp && (*cp != '\n')) 860 return -EINVAL; 861 /* 862 * Check for overflow; dev_loss_tmo is u32 863 */ 864 if (*val > UINT_MAX) 865 return -EINVAL; 866 867 return 0; 868 } 869 870 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 871 unsigned long val) 872 { 873 struct Scsi_Host *shost = rport_to_shost(rport); 874 struct fc_internal *i = to_fc_internal(shost->transportt); 875 876 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 877 (rport->port_state == FC_PORTSTATE_DELETED) || 878 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 879 return -EBUSY; 880 /* 881 * Check for overflow; dev_loss_tmo is u32 882 */ 883 if (val > UINT_MAX) 884 return -EINVAL; 885 886 /* 887 * If fast_io_fail is off we have to cap 888 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 889 */ 890 if (rport->fast_io_fail_tmo == -1 && 891 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 892 return -EINVAL; 893 894 i->f->set_rport_dev_loss_tmo(rport, val); 895 return 0; 896 } 897 898 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 899 static ssize_t 900 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 901 const char *buf, size_t count) 902 { 903 struct fc_rport *rport = transport_class_to_rport(dev); 904 unsigned long val; 905 int rc; 906 907 rc = fc_str_to_dev_loss(buf, &val); 908 if (rc) 909 return rc; 910 911 rc = fc_rport_set_dev_loss_tmo(rport, val); 912 if (rc) 913 return rc; 914 return count; 915 } 916 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 917 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 918 919 920 /* Private Remote Port Attributes */ 921 922 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 923 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 924 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 925 926 static ssize_t 927 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 928 char *buf) 929 { 930 struct fc_rport *rport = transport_class_to_rport(dev); 931 932 /* identify any roles that are port_id specific */ 933 if ((rport->port_id != -1) && 934 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 935 FC_WELLKNOWN_PORTID_MASK) { 936 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 937 case FC_FPORT_PORTID: 938 return snprintf(buf, 30, "Fabric Port\n"); 939 case FC_FABCTLR_PORTID: 940 return snprintf(buf, 30, "Fabric Controller\n"); 941 case FC_DIRSRVR_PORTID: 942 return snprintf(buf, 30, "Directory Server\n"); 943 case FC_TIMESRVR_PORTID: 944 return snprintf(buf, 30, "Time Server\n"); 945 case FC_MGMTSRVR_PORTID: 946 return snprintf(buf, 30, "Management Server\n"); 947 default: 948 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 949 } 950 } else { 951 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 952 return snprintf(buf, 20, "unknown\n"); 953 return get_fc_port_roles_names(rport->roles, buf); 954 } 955 } 956 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 957 show_fc_rport_roles, NULL); 958 959 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 960 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 961 962 /* 963 * fast_io_fail_tmo attribute 964 */ 965 static ssize_t 966 show_fc_rport_fast_io_fail_tmo (struct device *dev, 967 struct device_attribute *attr, char *buf) 968 { 969 struct fc_rport *rport = transport_class_to_rport(dev); 970 971 if (rport->fast_io_fail_tmo == -1) 972 return snprintf(buf, 5, "off\n"); 973 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 974 } 975 976 static ssize_t 977 store_fc_rport_fast_io_fail_tmo(struct device *dev, 978 struct device_attribute *attr, const char *buf, 979 size_t count) 980 { 981 int val; 982 char *cp; 983 struct fc_rport *rport = transport_class_to_rport(dev); 984 985 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 986 (rport->port_state == FC_PORTSTATE_DELETED) || 987 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 988 return -EBUSY; 989 if (strncmp(buf, "off", 3) == 0) 990 rport->fast_io_fail_tmo = -1; 991 else { 992 val = simple_strtoul(buf, &cp, 0); 993 if ((*cp && (*cp != '\n')) || (val < 0)) 994 return -EINVAL; 995 /* 996 * Cap fast_io_fail by dev_loss_tmo or 997 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 998 */ 999 if ((val >= rport->dev_loss_tmo) || 1000 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 1001 return -EINVAL; 1002 1003 rport->fast_io_fail_tmo = val; 1004 } 1005 return count; 1006 } 1007 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 1008 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 1009 1010 1011 /* 1012 * FC SCSI Target Attribute Management 1013 */ 1014 1015 /* 1016 * Note: in the target show function we recognize when the remote 1017 * port is in the hierarchy and do not allow the driver to get 1018 * involved in sysfs functions. The driver only gets involved if 1019 * it's the "old" style that doesn't use rports. 1020 */ 1021 #define fc_starget_show_function(field, format_string, sz, cast) \ 1022 static ssize_t \ 1023 show_fc_starget_##field (struct device *dev, \ 1024 struct device_attribute *attr, char *buf) \ 1025 { \ 1026 struct scsi_target *starget = transport_class_to_starget(dev); \ 1027 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1028 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1029 struct fc_rport *rport = starget_to_rport(starget); \ 1030 if (rport) \ 1031 fc_starget_##field(starget) = rport->field; \ 1032 else if (i->f->get_starget_##field) \ 1033 i->f->get_starget_##field(starget); \ 1034 return snprintf(buf, sz, format_string, \ 1035 cast fc_starget_##field(starget)); \ 1036 } 1037 1038 #define fc_starget_rd_attr(field, format_string, sz) \ 1039 fc_starget_show_function(field, format_string, sz, ) \ 1040 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1041 show_fc_starget_##field, NULL) 1042 1043 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1044 fc_starget_show_function(field, format_string, sz, (cast)) \ 1045 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1046 show_fc_starget_##field, NULL) 1047 1048 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1049 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1050 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1051 i->private_starget_attrs[count].store = NULL; \ 1052 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1053 if (i->f->show_starget_##field) \ 1054 count++ 1055 1056 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1057 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1058 if (!i->f->set_starget_##field) { \ 1059 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1060 i->private_starget_attrs[count].store = NULL; \ 1061 } \ 1062 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1063 if (i->f->show_starget_##field) \ 1064 count++ 1065 1066 /* The FC Transport SCSI Target Attributes: */ 1067 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1068 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1069 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1070 1071 1072 /* 1073 * FC Virtual Port Attribute Management 1074 */ 1075 1076 #define fc_vport_show_function(field, format_string, sz, cast) \ 1077 static ssize_t \ 1078 show_fc_vport_##field (struct device *dev, \ 1079 struct device_attribute *attr, char *buf) \ 1080 { \ 1081 struct fc_vport *vport = transport_class_to_vport(dev); \ 1082 struct Scsi_Host *shost = vport_to_shost(vport); \ 1083 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1084 if ((i->f->get_vport_##field) && \ 1085 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1086 i->f->get_vport_##field(vport); \ 1087 return snprintf(buf, sz, format_string, cast vport->field); \ 1088 } 1089 1090 #define fc_vport_store_function(field) \ 1091 static ssize_t \ 1092 store_fc_vport_##field(struct device *dev, \ 1093 struct device_attribute *attr, \ 1094 const char *buf, size_t count) \ 1095 { \ 1096 int val; \ 1097 struct fc_vport *vport = transport_class_to_vport(dev); \ 1098 struct Scsi_Host *shost = vport_to_shost(vport); \ 1099 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1100 char *cp; \ 1101 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1102 return -EBUSY; \ 1103 val = simple_strtoul(buf, &cp, 0); \ 1104 if (*cp && (*cp != '\n')) \ 1105 return -EINVAL; \ 1106 i->f->set_vport_##field(vport, val); \ 1107 return count; \ 1108 } 1109 1110 #define fc_vport_store_str_function(field, slen) \ 1111 static ssize_t \ 1112 store_fc_vport_##field(struct device *dev, \ 1113 struct device_attribute *attr, \ 1114 const char *buf, size_t count) \ 1115 { \ 1116 struct fc_vport *vport = transport_class_to_vport(dev); \ 1117 struct Scsi_Host *shost = vport_to_shost(vport); \ 1118 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1119 unsigned int cnt=count; \ 1120 \ 1121 /* count may include a LF at end of string */ \ 1122 if (buf[cnt-1] == '\n') \ 1123 cnt--; \ 1124 if (cnt > ((slen) - 1)) \ 1125 return -EINVAL; \ 1126 memcpy(vport->field, buf, cnt); \ 1127 i->f->set_vport_##field(vport); \ 1128 return count; \ 1129 } 1130 1131 #define fc_vport_rd_attr(field, format_string, sz) \ 1132 fc_vport_show_function(field, format_string, sz, ) \ 1133 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1134 show_fc_vport_##field, NULL) 1135 1136 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1137 fc_vport_show_function(field, format_string, sz, (cast)) \ 1138 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1139 show_fc_vport_##field, NULL) 1140 1141 #define fc_vport_rw_attr(field, format_string, sz) \ 1142 fc_vport_show_function(field, format_string, sz, ) \ 1143 fc_vport_store_function(field) \ 1144 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1145 show_fc_vport_##field, \ 1146 store_fc_vport_##field) 1147 1148 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1149 static ssize_t \ 1150 show_fc_vport_##field (struct device *dev, \ 1151 struct device_attribute *attr, char *buf) \ 1152 { \ 1153 struct fc_vport *vport = transport_class_to_vport(dev); \ 1154 return snprintf(buf, sz, format_string, cast vport->field); \ 1155 } 1156 1157 #define fc_private_vport_store_u32_function(field) \ 1158 static ssize_t \ 1159 store_fc_vport_##field(struct device *dev, \ 1160 struct device_attribute *attr, \ 1161 const char *buf, size_t count) \ 1162 { \ 1163 u32 val; \ 1164 struct fc_vport *vport = transport_class_to_vport(dev); \ 1165 char *cp; \ 1166 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1167 return -EBUSY; \ 1168 val = simple_strtoul(buf, &cp, 0); \ 1169 if (*cp && (*cp != '\n')) \ 1170 return -EINVAL; \ 1171 vport->field = val; \ 1172 return count; \ 1173 } 1174 1175 1176 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1177 fc_private_vport_show_function(field, format_string, sz, ) \ 1178 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1179 show_fc_vport_##field, NULL) 1180 1181 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1182 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1183 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1184 show_fc_vport_##field, NULL) 1185 1186 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1187 fc_private_vport_show_function(field, format_string, sz, ) \ 1188 fc_private_vport_store_u32_function(field) \ 1189 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1190 show_fc_vport_##field, \ 1191 store_fc_vport_##field) 1192 1193 1194 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1195 static ssize_t \ 1196 show_fc_vport_##title (struct device *dev, \ 1197 struct device_attribute *attr, \ 1198 char *buf) \ 1199 { \ 1200 struct fc_vport *vport = transport_class_to_vport(dev); \ 1201 const char *name; \ 1202 name = get_fc_##title##_name(vport->title); \ 1203 if (!name) \ 1204 return -EINVAL; \ 1205 return snprintf(buf, maxlen, "%s\n", name); \ 1206 } \ 1207 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1208 show_fc_vport_##title, NULL) 1209 1210 1211 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1212 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1213 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1214 i->private_vport_attrs[count].store = NULL; \ 1215 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1216 if (i->f->get_##field) \ 1217 count++ 1218 /* NOTE: Above MACRO differs: checks function not show bit */ 1219 1220 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1221 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1222 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1223 i->private_vport_attrs[count].store = NULL; \ 1224 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1225 count++ 1226 1227 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1228 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1229 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1230 if (i->f->field) \ 1231 count++ 1232 /* NOTE: Above MACRO differs: checks function */ 1233 1234 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1235 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1236 if (!i->f->set_vport_##field) { \ 1237 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1238 i->private_vport_attrs[count].store = NULL; \ 1239 } \ 1240 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1241 count++ 1242 /* NOTE: Above MACRO differs: does not check show bit */ 1243 1244 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1245 { \ 1246 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1247 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1248 count++; \ 1249 } 1250 1251 1252 /* The FC Transport Virtual Port Attributes: */ 1253 1254 /* Fixed Virtual Port Attributes */ 1255 1256 /* Dynamic Virtual Port Attributes */ 1257 1258 /* Private Virtual Port Attributes */ 1259 1260 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1261 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1262 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1263 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1264 1265 static ssize_t 1266 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1267 char *buf) 1268 { 1269 struct fc_vport *vport = transport_class_to_vport(dev); 1270 1271 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1272 return snprintf(buf, 20, "unknown\n"); 1273 return get_fc_port_roles_names(vport->roles, buf); 1274 } 1275 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1276 1277 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1278 1279 fc_private_vport_show_function(symbolic_name, "%s\n", 1280 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1281 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1282 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1283 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1284 1285 static ssize_t 1286 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1287 const char *buf, size_t count) 1288 { 1289 struct fc_vport *vport = transport_class_to_vport(dev); 1290 struct Scsi_Host *shost = vport_to_shost(vport); 1291 unsigned long flags; 1292 1293 spin_lock_irqsave(shost->host_lock, flags); 1294 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) { 1295 spin_unlock_irqrestore(shost->host_lock, flags); 1296 return -EBUSY; 1297 } 1298 vport->flags |= FC_VPORT_DELETING; 1299 spin_unlock_irqrestore(shost->host_lock, flags); 1300 1301 fc_queue_work(shost, &vport->vport_delete_work); 1302 return count; 1303 } 1304 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1305 NULL, store_fc_vport_delete); 1306 1307 1308 /* 1309 * Enable/Disable vport 1310 * Write "1" to disable, write "0" to enable 1311 */ 1312 static ssize_t 1313 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1314 const char *buf, 1315 size_t count) 1316 { 1317 struct fc_vport *vport = transport_class_to_vport(dev); 1318 struct Scsi_Host *shost = vport_to_shost(vport); 1319 struct fc_internal *i = to_fc_internal(shost->transportt); 1320 int stat; 1321 1322 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1323 return -EBUSY; 1324 1325 if (*buf == '0') { 1326 if (vport->vport_state != FC_VPORT_DISABLED) 1327 return -EALREADY; 1328 } else if (*buf == '1') { 1329 if (vport->vport_state == FC_VPORT_DISABLED) 1330 return -EALREADY; 1331 } else 1332 return -EINVAL; 1333 1334 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1335 return stat ? stat : count; 1336 } 1337 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1338 NULL, store_fc_vport_disable); 1339 1340 1341 /* 1342 * Host Attribute Management 1343 */ 1344 1345 #define fc_host_show_function(field, format_string, sz, cast) \ 1346 static ssize_t \ 1347 show_fc_host_##field (struct device *dev, \ 1348 struct device_attribute *attr, char *buf) \ 1349 { \ 1350 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1351 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1352 if (i->f->get_host_##field) \ 1353 i->f->get_host_##field(shost); \ 1354 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1355 } 1356 1357 #define fc_host_store_function(field) \ 1358 static ssize_t \ 1359 store_fc_host_##field(struct device *dev, \ 1360 struct device_attribute *attr, \ 1361 const char *buf, size_t count) \ 1362 { \ 1363 int val; \ 1364 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1365 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1366 char *cp; \ 1367 \ 1368 val = simple_strtoul(buf, &cp, 0); \ 1369 if (*cp && (*cp != '\n')) \ 1370 return -EINVAL; \ 1371 i->f->set_host_##field(shost, val); \ 1372 return count; \ 1373 } 1374 1375 #define fc_host_store_str_function(field, slen) \ 1376 static ssize_t \ 1377 store_fc_host_##field(struct device *dev, \ 1378 struct device_attribute *attr, \ 1379 const char *buf, size_t count) \ 1380 { \ 1381 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1382 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1383 unsigned int cnt=count; \ 1384 \ 1385 /* count may include a LF at end of string */ \ 1386 if (buf[cnt-1] == '\n') \ 1387 cnt--; \ 1388 if (cnt > ((slen) - 1)) \ 1389 return -EINVAL; \ 1390 memcpy(fc_host_##field(shost), buf, cnt); \ 1391 i->f->set_host_##field(shost); \ 1392 return count; \ 1393 } 1394 1395 #define fc_host_rd_attr(field, format_string, sz) \ 1396 fc_host_show_function(field, format_string, sz, ) \ 1397 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1398 show_fc_host_##field, NULL) 1399 1400 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1401 fc_host_show_function(field, format_string, sz, (cast)) \ 1402 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1403 show_fc_host_##field, NULL) 1404 1405 #define fc_host_rw_attr(field, format_string, sz) \ 1406 fc_host_show_function(field, format_string, sz, ) \ 1407 fc_host_store_function(field) \ 1408 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1409 show_fc_host_##field, \ 1410 store_fc_host_##field) 1411 1412 #define fc_host_rd_enum_attr(title, maxlen) \ 1413 static ssize_t \ 1414 show_fc_host_##title (struct device *dev, \ 1415 struct device_attribute *attr, char *buf) \ 1416 { \ 1417 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1418 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1419 const char *name; \ 1420 if (i->f->get_host_##title) \ 1421 i->f->get_host_##title(shost); \ 1422 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1423 if (!name) \ 1424 return -EINVAL; \ 1425 return snprintf(buf, maxlen, "%s\n", name); \ 1426 } \ 1427 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1428 1429 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1430 i->private_host_attrs[count] = device_attr_host_##field; \ 1431 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1432 i->private_host_attrs[count].store = NULL; \ 1433 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1434 if (i->f->show_host_##field) \ 1435 count++ 1436 1437 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1438 i->private_host_attrs[count] = device_attr_host_##field; \ 1439 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1440 i->private_host_attrs[count].store = NULL; \ 1441 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1442 count++ 1443 1444 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1445 i->private_host_attrs[count] = device_attr_host_##field; \ 1446 if (!i->f->set_host_##field) { \ 1447 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1448 i->private_host_attrs[count].store = NULL; \ 1449 } \ 1450 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1451 if (i->f->show_host_##field) \ 1452 count++ 1453 1454 1455 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1456 static ssize_t \ 1457 show_fc_host_##field (struct device *dev, \ 1458 struct device_attribute *attr, char *buf) \ 1459 { \ 1460 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1461 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1462 } 1463 1464 #define fc_private_host_rd_attr(field, format_string, sz) \ 1465 fc_private_host_show_function(field, format_string, sz, ) \ 1466 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1467 show_fc_host_##field, NULL) 1468 1469 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1470 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1471 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1472 show_fc_host_##field, NULL) 1473 1474 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1475 i->private_host_attrs[count] = device_attr_host_##field; \ 1476 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1477 i->private_host_attrs[count].store = NULL; \ 1478 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1479 count++ 1480 1481 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1482 { \ 1483 i->private_host_attrs[count] = device_attr_host_##field; \ 1484 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1485 count++; \ 1486 } 1487 1488 1489 /* Fixed Host Attributes */ 1490 1491 static ssize_t 1492 show_fc_host_supported_classes (struct device *dev, 1493 struct device_attribute *attr, char *buf) 1494 { 1495 struct Scsi_Host *shost = transport_class_to_shost(dev); 1496 1497 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1498 return snprintf(buf, 20, "unspecified\n"); 1499 1500 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1501 } 1502 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1503 show_fc_host_supported_classes, NULL); 1504 1505 static ssize_t 1506 show_fc_host_supported_fc4s (struct device *dev, 1507 struct device_attribute *attr, char *buf) 1508 { 1509 struct Scsi_Host *shost = transport_class_to_shost(dev); 1510 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1511 } 1512 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1513 show_fc_host_supported_fc4s, NULL); 1514 1515 static ssize_t 1516 show_fc_host_supported_speeds (struct device *dev, 1517 struct device_attribute *attr, char *buf) 1518 { 1519 struct Scsi_Host *shost = transport_class_to_shost(dev); 1520 1521 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1522 return snprintf(buf, 20, "unknown\n"); 1523 1524 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1525 } 1526 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1527 show_fc_host_supported_speeds, NULL); 1528 1529 1530 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1531 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1532 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1533 unsigned long long); 1534 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1535 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1536 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1537 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1538 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1539 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1540 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1541 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1542 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1543 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1544 1545 1546 /* Dynamic Host Attributes */ 1547 1548 static ssize_t 1549 show_fc_host_active_fc4s (struct device *dev, 1550 struct device_attribute *attr, char *buf) 1551 { 1552 struct Scsi_Host *shost = transport_class_to_shost(dev); 1553 struct fc_internal *i = to_fc_internal(shost->transportt); 1554 1555 if (i->f->get_host_active_fc4s) 1556 i->f->get_host_active_fc4s(shost); 1557 1558 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1559 } 1560 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1561 show_fc_host_active_fc4s, NULL); 1562 1563 static ssize_t 1564 show_fc_host_speed (struct device *dev, 1565 struct device_attribute *attr, char *buf) 1566 { 1567 struct Scsi_Host *shost = transport_class_to_shost(dev); 1568 struct fc_internal *i = to_fc_internal(shost->transportt); 1569 1570 if (i->f->get_host_speed) 1571 i->f->get_host_speed(shost); 1572 1573 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1574 return snprintf(buf, 20, "unknown\n"); 1575 1576 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1577 } 1578 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1579 show_fc_host_speed, NULL); 1580 1581 1582 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1583 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1584 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1585 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1586 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1587 1588 fc_private_host_show_function(system_hostname, "%s\n", 1589 FC_SYMBOLIC_NAME_SIZE + 1, ) 1590 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1591 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1592 show_fc_host_system_hostname, store_fc_host_system_hostname); 1593 1594 1595 /* Private Host Attributes */ 1596 1597 static ssize_t 1598 show_fc_private_host_tgtid_bind_type(struct device *dev, 1599 struct device_attribute *attr, char *buf) 1600 { 1601 struct Scsi_Host *shost = transport_class_to_shost(dev); 1602 const char *name; 1603 1604 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1605 if (!name) 1606 return -EINVAL; 1607 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1608 } 1609 1610 #define get_list_head_entry(pos, head, member) \ 1611 pos = list_entry((head)->next, typeof(*pos), member) 1612 1613 static ssize_t 1614 store_fc_private_host_tgtid_bind_type(struct device *dev, 1615 struct device_attribute *attr, const char *buf, size_t count) 1616 { 1617 struct Scsi_Host *shost = transport_class_to_shost(dev); 1618 struct fc_rport *rport; 1619 enum fc_tgtid_binding_type val; 1620 unsigned long flags; 1621 1622 if (get_fc_tgtid_bind_type_match(buf, &val)) 1623 return -EINVAL; 1624 1625 /* if changing bind type, purge all unused consistent bindings */ 1626 if (val != fc_host_tgtid_bind_type(shost)) { 1627 spin_lock_irqsave(shost->host_lock, flags); 1628 while (!list_empty(&fc_host_rport_bindings(shost))) { 1629 get_list_head_entry(rport, 1630 &fc_host_rport_bindings(shost), peers); 1631 list_del(&rport->peers); 1632 rport->port_state = FC_PORTSTATE_DELETED; 1633 fc_queue_work(shost, &rport->rport_delete_work); 1634 } 1635 spin_unlock_irqrestore(shost->host_lock, flags); 1636 } 1637 1638 fc_host_tgtid_bind_type(shost) = val; 1639 return count; 1640 } 1641 1642 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1643 show_fc_private_host_tgtid_bind_type, 1644 store_fc_private_host_tgtid_bind_type); 1645 1646 static ssize_t 1647 store_fc_private_host_issue_lip(struct device *dev, 1648 struct device_attribute *attr, const char *buf, size_t count) 1649 { 1650 struct Scsi_Host *shost = transport_class_to_shost(dev); 1651 struct fc_internal *i = to_fc_internal(shost->transportt); 1652 int ret; 1653 1654 /* ignore any data value written to the attribute */ 1655 if (i->f->issue_fc_host_lip) { 1656 ret = i->f->issue_fc_host_lip(shost); 1657 return ret ? ret: count; 1658 } 1659 1660 return -ENOENT; 1661 } 1662 1663 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1664 store_fc_private_host_issue_lip); 1665 1666 static ssize_t 1667 store_fc_private_host_dev_loss_tmo(struct device *dev, 1668 struct device_attribute *attr, 1669 const char *buf, size_t count) 1670 { 1671 struct Scsi_Host *shost = transport_class_to_shost(dev); 1672 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1673 struct fc_rport *rport; 1674 unsigned long val, flags; 1675 int rc; 1676 1677 rc = fc_str_to_dev_loss(buf, &val); 1678 if (rc) 1679 return rc; 1680 1681 fc_host_dev_loss_tmo(shost) = val; 1682 spin_lock_irqsave(shost->host_lock, flags); 1683 list_for_each_entry(rport, &fc_host->rports, peers) 1684 fc_rport_set_dev_loss_tmo(rport, val); 1685 spin_unlock_irqrestore(shost->host_lock, flags); 1686 return count; 1687 } 1688 1689 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 1690 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 1691 show_fc_host_dev_loss_tmo, 1692 store_fc_private_host_dev_loss_tmo); 1693 1694 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1695 1696 /* 1697 * Host Statistics Management 1698 */ 1699 1700 /* Show a given attribute in the statistics group */ 1701 static ssize_t 1702 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1703 { 1704 struct Scsi_Host *shost = transport_class_to_shost(dev); 1705 struct fc_internal *i = to_fc_internal(shost->transportt); 1706 struct fc_host_statistics *stats; 1707 ssize_t ret = -ENOENT; 1708 1709 if (offset > sizeof(struct fc_host_statistics) || 1710 offset % sizeof(u64) != 0) 1711 WARN_ON(1); 1712 1713 if (i->f->get_fc_host_stats) { 1714 stats = (i->f->get_fc_host_stats)(shost); 1715 if (stats) 1716 ret = snprintf(buf, 20, "0x%llx\n", 1717 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1718 } 1719 return ret; 1720 } 1721 1722 1723 /* generate a read-only statistics attribute */ 1724 #define fc_host_statistic(name) \ 1725 static ssize_t show_fcstat_##name(struct device *cd, \ 1726 struct device_attribute *attr, \ 1727 char *buf) \ 1728 { \ 1729 return fc_stat_show(cd, buf, \ 1730 offsetof(struct fc_host_statistics, name)); \ 1731 } \ 1732 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1733 1734 fc_host_statistic(seconds_since_last_reset); 1735 fc_host_statistic(tx_frames); 1736 fc_host_statistic(tx_words); 1737 fc_host_statistic(rx_frames); 1738 fc_host_statistic(rx_words); 1739 fc_host_statistic(lip_count); 1740 fc_host_statistic(nos_count); 1741 fc_host_statistic(error_frames); 1742 fc_host_statistic(dumped_frames); 1743 fc_host_statistic(link_failure_count); 1744 fc_host_statistic(loss_of_sync_count); 1745 fc_host_statistic(loss_of_signal_count); 1746 fc_host_statistic(prim_seq_protocol_err_count); 1747 fc_host_statistic(invalid_tx_word_count); 1748 fc_host_statistic(invalid_crc_count); 1749 fc_host_statistic(fcp_input_requests); 1750 fc_host_statistic(fcp_output_requests); 1751 fc_host_statistic(fcp_control_requests); 1752 fc_host_statistic(fcp_input_megabytes); 1753 fc_host_statistic(fcp_output_megabytes); 1754 fc_host_statistic(fcp_packet_alloc_failures); 1755 fc_host_statistic(fcp_packet_aborts); 1756 fc_host_statistic(fcp_frame_alloc_failures); 1757 fc_host_statistic(fc_no_free_exch); 1758 fc_host_statistic(fc_no_free_exch_xid); 1759 fc_host_statistic(fc_xid_not_found); 1760 fc_host_statistic(fc_xid_busy); 1761 fc_host_statistic(fc_seq_not_found); 1762 fc_host_statistic(fc_non_bls_resp); 1763 1764 static ssize_t 1765 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1766 const char *buf, size_t count) 1767 { 1768 struct Scsi_Host *shost = transport_class_to_shost(dev); 1769 struct fc_internal *i = to_fc_internal(shost->transportt); 1770 1771 /* ignore any data value written to the attribute */ 1772 if (i->f->reset_fc_host_stats) { 1773 i->f->reset_fc_host_stats(shost); 1774 return count; 1775 } 1776 1777 return -ENOENT; 1778 } 1779 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1780 fc_reset_statistics); 1781 1782 static struct attribute *fc_statistics_attrs[] = { 1783 &device_attr_host_seconds_since_last_reset.attr, 1784 &device_attr_host_tx_frames.attr, 1785 &device_attr_host_tx_words.attr, 1786 &device_attr_host_rx_frames.attr, 1787 &device_attr_host_rx_words.attr, 1788 &device_attr_host_lip_count.attr, 1789 &device_attr_host_nos_count.attr, 1790 &device_attr_host_error_frames.attr, 1791 &device_attr_host_dumped_frames.attr, 1792 &device_attr_host_link_failure_count.attr, 1793 &device_attr_host_loss_of_sync_count.attr, 1794 &device_attr_host_loss_of_signal_count.attr, 1795 &device_attr_host_prim_seq_protocol_err_count.attr, 1796 &device_attr_host_invalid_tx_word_count.attr, 1797 &device_attr_host_invalid_crc_count.attr, 1798 &device_attr_host_fcp_input_requests.attr, 1799 &device_attr_host_fcp_output_requests.attr, 1800 &device_attr_host_fcp_control_requests.attr, 1801 &device_attr_host_fcp_input_megabytes.attr, 1802 &device_attr_host_fcp_output_megabytes.attr, 1803 &device_attr_host_fcp_packet_alloc_failures.attr, 1804 &device_attr_host_fcp_packet_aborts.attr, 1805 &device_attr_host_fcp_frame_alloc_failures.attr, 1806 &device_attr_host_fc_no_free_exch.attr, 1807 &device_attr_host_fc_no_free_exch_xid.attr, 1808 &device_attr_host_fc_xid_not_found.attr, 1809 &device_attr_host_fc_xid_busy.attr, 1810 &device_attr_host_fc_seq_not_found.attr, 1811 &device_attr_host_fc_non_bls_resp.attr, 1812 &device_attr_host_reset_statistics.attr, 1813 NULL 1814 }; 1815 1816 static struct attribute_group fc_statistics_group = { 1817 .name = "statistics", 1818 .attrs = fc_statistics_attrs, 1819 }; 1820 1821 1822 /* Host Vport Attributes */ 1823 1824 static int 1825 fc_parse_wwn(const char *ns, u64 *nm) 1826 { 1827 unsigned int i, j; 1828 u8 wwn[8]; 1829 1830 memset(wwn, 0, sizeof(wwn)); 1831 1832 /* Validate and store the new name */ 1833 for (i=0, j=0; i < 16; i++) { 1834 int value; 1835 1836 value = hex_to_bin(*ns++); 1837 if (value >= 0) 1838 j = (j << 4) | value; 1839 else 1840 return -EINVAL; 1841 if (i % 2) { 1842 wwn[i/2] = j & 0xff; 1843 j = 0; 1844 } 1845 } 1846 1847 *nm = wwn_to_u64(wwn); 1848 1849 return 0; 1850 } 1851 1852 1853 /* 1854 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1855 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1856 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1857 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1858 */ 1859 static ssize_t 1860 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1861 const char *buf, size_t count) 1862 { 1863 struct Scsi_Host *shost = transport_class_to_shost(dev); 1864 struct fc_vport_identifiers vid; 1865 struct fc_vport *vport; 1866 unsigned int cnt=count; 1867 int stat; 1868 1869 memset(&vid, 0, sizeof(vid)); 1870 1871 /* count may include a LF at end of string */ 1872 if (buf[cnt-1] == '\n') 1873 cnt--; 1874 1875 /* validate we have enough characters for WWPN */ 1876 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1877 return -EINVAL; 1878 1879 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1880 if (stat) 1881 return stat; 1882 1883 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1884 if (stat) 1885 return stat; 1886 1887 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1888 vid.vport_type = FC_PORTTYPE_NPIV; 1889 /* vid.symbolic_name is already zero/NULL's */ 1890 vid.disable = false; /* always enabled */ 1891 1892 /* we only allow support on Channel 0 !!! */ 1893 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1894 return stat ? stat : count; 1895 } 1896 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1897 store_fc_host_vport_create); 1898 1899 1900 /* 1901 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1902 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1903 * The WWNs are specified as hex characters, and may *not* contain 1904 * any prefixes (e.g. 0x, x, etc) 1905 */ 1906 static ssize_t 1907 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1908 const char *buf, size_t count) 1909 { 1910 struct Scsi_Host *shost = transport_class_to_shost(dev); 1911 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1912 struct fc_vport *vport; 1913 u64 wwpn, wwnn; 1914 unsigned long flags; 1915 unsigned int cnt=count; 1916 int stat, match; 1917 1918 /* count may include a LF at end of string */ 1919 if (buf[cnt-1] == '\n') 1920 cnt--; 1921 1922 /* validate we have enough characters for WWPN */ 1923 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1924 return -EINVAL; 1925 1926 stat = fc_parse_wwn(&buf[0], &wwpn); 1927 if (stat) 1928 return stat; 1929 1930 stat = fc_parse_wwn(&buf[17], &wwnn); 1931 if (stat) 1932 return stat; 1933 1934 spin_lock_irqsave(shost->host_lock, flags); 1935 match = 0; 1936 /* we only allow support on Channel 0 !!! */ 1937 list_for_each_entry(vport, &fc_host->vports, peers) { 1938 if ((vport->channel == 0) && 1939 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1940 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1941 break; 1942 vport->flags |= FC_VPORT_DELETING; 1943 match = 1; 1944 break; 1945 } 1946 } 1947 spin_unlock_irqrestore(shost->host_lock, flags); 1948 1949 if (!match) 1950 return -ENODEV; 1951 1952 stat = fc_vport_terminate(vport); 1953 return stat ? stat : count; 1954 } 1955 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1956 store_fc_host_vport_delete); 1957 1958 1959 static int fc_host_match(struct attribute_container *cont, 1960 struct device *dev) 1961 { 1962 struct Scsi_Host *shost; 1963 struct fc_internal *i; 1964 1965 if (!scsi_is_host_device(dev)) 1966 return 0; 1967 1968 shost = dev_to_shost(dev); 1969 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1970 != &fc_host_class.class) 1971 return 0; 1972 1973 i = to_fc_internal(shost->transportt); 1974 1975 return &i->t.host_attrs.ac == cont; 1976 } 1977 1978 static int fc_target_match(struct attribute_container *cont, 1979 struct device *dev) 1980 { 1981 struct Scsi_Host *shost; 1982 struct fc_internal *i; 1983 1984 if (!scsi_is_target_device(dev)) 1985 return 0; 1986 1987 shost = dev_to_shost(dev->parent); 1988 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1989 != &fc_host_class.class) 1990 return 0; 1991 1992 i = to_fc_internal(shost->transportt); 1993 1994 return &i->t.target_attrs.ac == cont; 1995 } 1996 1997 static void fc_rport_dev_release(struct device *dev) 1998 { 1999 struct fc_rport *rport = dev_to_rport(dev); 2000 put_device(dev->parent); 2001 kfree(rport); 2002 } 2003 2004 int scsi_is_fc_rport(const struct device *dev) 2005 { 2006 return dev->release == fc_rport_dev_release; 2007 } 2008 EXPORT_SYMBOL(scsi_is_fc_rport); 2009 2010 static int fc_rport_match(struct attribute_container *cont, 2011 struct device *dev) 2012 { 2013 struct Scsi_Host *shost; 2014 struct fc_internal *i; 2015 2016 if (!scsi_is_fc_rport(dev)) 2017 return 0; 2018 2019 shost = dev_to_shost(dev->parent); 2020 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2021 != &fc_host_class.class) 2022 return 0; 2023 2024 i = to_fc_internal(shost->transportt); 2025 2026 return &i->rport_attr_cont.ac == cont; 2027 } 2028 2029 2030 static void fc_vport_dev_release(struct device *dev) 2031 { 2032 struct fc_vport *vport = dev_to_vport(dev); 2033 put_device(dev->parent); /* release kobj parent */ 2034 kfree(vport); 2035 } 2036 2037 static int scsi_is_fc_vport(const struct device *dev) 2038 { 2039 return dev->release == fc_vport_dev_release; 2040 } 2041 2042 static int fc_vport_match(struct attribute_container *cont, 2043 struct device *dev) 2044 { 2045 struct fc_vport *vport; 2046 struct Scsi_Host *shost; 2047 struct fc_internal *i; 2048 2049 if (!scsi_is_fc_vport(dev)) 2050 return 0; 2051 vport = dev_to_vport(dev); 2052 2053 shost = vport_to_shost(vport); 2054 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2055 != &fc_host_class.class) 2056 return 0; 2057 2058 i = to_fc_internal(shost->transportt); 2059 return &i->vport_attr_cont.ac == cont; 2060 } 2061 2062 2063 /** 2064 * fc_eh_timed_out - FC Transport I/O timeout intercept handler 2065 * @scmd: The SCSI command which timed out 2066 * 2067 * This routine protects against error handlers getting invoked while a 2068 * rport is in a blocked state, typically due to a temporarily loss of 2069 * connectivity. If the error handlers are allowed to proceed, requests 2070 * to abort i/o, reset the target, etc will likely fail as there is no way 2071 * to communicate with the device to perform the requested function. These 2072 * failures may result in the midlayer taking the device offline, requiring 2073 * manual intervention to restore operation. 2074 * 2075 * This routine, called whenever an i/o times out, validates the state of 2076 * the underlying rport. If the rport is blocked, it returns 2077 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2078 * Eventually, either the device will return, or devloss_tmo will fire, 2079 * and when the timeout then fires, it will be handled normally. 2080 * If the rport is not blocked, normal error handling continues. 2081 * 2082 * Notes: 2083 * This routine assumes no locks are held on entry. 2084 */ 2085 enum blk_eh_timer_return 2086 fc_eh_timed_out(struct scsi_cmnd *scmd) 2087 { 2088 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2089 2090 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2091 return BLK_EH_RESET_TIMER; 2092 2093 return BLK_EH_DONE; 2094 } 2095 EXPORT_SYMBOL(fc_eh_timed_out); 2096 2097 /* 2098 * Called by fc_user_scan to locate an rport on the shost that 2099 * matches the channel and target id, and invoke scsi_scan_target() 2100 * on the rport. 2101 */ 2102 static void 2103 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2104 { 2105 struct fc_rport *rport; 2106 unsigned long flags; 2107 2108 spin_lock_irqsave(shost->host_lock, flags); 2109 2110 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2111 if (rport->scsi_target_id == -1) 2112 continue; 2113 2114 if (rport->port_state != FC_PORTSTATE_ONLINE) 2115 continue; 2116 2117 if ((channel == rport->channel) && 2118 (id == rport->scsi_target_id)) { 2119 spin_unlock_irqrestore(shost->host_lock, flags); 2120 scsi_scan_target(&rport->dev, channel, id, lun, 2121 SCSI_SCAN_MANUAL); 2122 return; 2123 } 2124 } 2125 2126 spin_unlock_irqrestore(shost->host_lock, flags); 2127 } 2128 2129 /* 2130 * Called via sysfs scan routines. Necessary, as the FC transport 2131 * wants to place all target objects below the rport object. So this 2132 * routine must invoke the scsi_scan_target() routine with the rport 2133 * object as the parent. 2134 */ 2135 static int 2136 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2137 { 2138 uint chlo, chhi; 2139 uint tgtlo, tgthi; 2140 2141 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2142 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2143 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2144 return -EINVAL; 2145 2146 if (channel == SCAN_WILD_CARD) { 2147 chlo = 0; 2148 chhi = shost->max_channel + 1; 2149 } else { 2150 chlo = channel; 2151 chhi = channel + 1; 2152 } 2153 2154 if (id == SCAN_WILD_CARD) { 2155 tgtlo = 0; 2156 tgthi = shost->max_id; 2157 } else { 2158 tgtlo = id; 2159 tgthi = id + 1; 2160 } 2161 2162 for ( ; chlo < chhi; chlo++) 2163 for ( ; tgtlo < tgthi; tgtlo++) 2164 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2165 2166 return 0; 2167 } 2168 2169 struct scsi_transport_template * 2170 fc_attach_transport(struct fc_function_template *ft) 2171 { 2172 int count; 2173 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2174 GFP_KERNEL); 2175 2176 if (unlikely(!i)) 2177 return NULL; 2178 2179 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2180 i->t.target_attrs.ac.class = &fc_transport_class.class; 2181 i->t.target_attrs.ac.match = fc_target_match; 2182 i->t.target_size = sizeof(struct fc_starget_attrs); 2183 transport_container_register(&i->t.target_attrs); 2184 2185 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2186 i->t.host_attrs.ac.class = &fc_host_class.class; 2187 i->t.host_attrs.ac.match = fc_host_match; 2188 i->t.host_size = sizeof(struct fc_host_attrs); 2189 if (ft->get_fc_host_stats) 2190 i->t.host_attrs.statistics = &fc_statistics_group; 2191 transport_container_register(&i->t.host_attrs); 2192 2193 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2194 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2195 i->rport_attr_cont.ac.match = fc_rport_match; 2196 transport_container_register(&i->rport_attr_cont); 2197 2198 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2199 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2200 i->vport_attr_cont.ac.match = fc_vport_match; 2201 transport_container_register(&i->vport_attr_cont); 2202 2203 i->f = ft; 2204 2205 /* Transport uses the shost workq for scsi scanning */ 2206 i->t.create_work_queue = 1; 2207 2208 i->t.user_scan = fc_user_scan; 2209 2210 /* 2211 * Setup SCSI Target Attributes. 2212 */ 2213 count = 0; 2214 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2215 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2216 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2217 2218 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2219 2220 i->starget_attrs[count] = NULL; 2221 2222 2223 /* 2224 * Setup SCSI Host Attributes. 2225 */ 2226 count=0; 2227 SETUP_HOST_ATTRIBUTE_RD(node_name); 2228 SETUP_HOST_ATTRIBUTE_RD(port_name); 2229 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2230 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2231 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2232 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2233 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2234 if (ft->vport_create) { 2235 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2236 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2237 } 2238 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2239 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2240 SETUP_HOST_ATTRIBUTE_RD(model); 2241 SETUP_HOST_ATTRIBUTE_RD(model_description); 2242 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2243 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2244 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2245 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2246 2247 SETUP_HOST_ATTRIBUTE_RD(port_id); 2248 SETUP_HOST_ATTRIBUTE_RD(port_type); 2249 SETUP_HOST_ATTRIBUTE_RD(port_state); 2250 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2251 SETUP_HOST_ATTRIBUTE_RD(speed); 2252 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2253 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2254 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2255 2256 /* Transport-managed attributes */ 2257 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2258 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2259 if (ft->issue_fc_host_lip) 2260 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2261 if (ft->vport_create) 2262 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2263 if (ft->vport_delete) 2264 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2265 2266 BUG_ON(count > FC_HOST_NUM_ATTRS); 2267 2268 i->host_attrs[count] = NULL; 2269 2270 /* 2271 * Setup Remote Port Attributes. 2272 */ 2273 count=0; 2274 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2275 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2276 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2277 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2278 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2279 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2280 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2281 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2282 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2283 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2284 2285 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2286 2287 i->rport_attrs[count] = NULL; 2288 2289 /* 2290 * Setup Virtual Port Attributes. 2291 */ 2292 count=0; 2293 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2294 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2295 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2296 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2297 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2298 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2299 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2300 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2301 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2302 2303 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2304 2305 i->vport_attrs[count] = NULL; 2306 2307 return &i->t; 2308 } 2309 EXPORT_SYMBOL(fc_attach_transport); 2310 2311 void fc_release_transport(struct scsi_transport_template *t) 2312 { 2313 struct fc_internal *i = to_fc_internal(t); 2314 2315 transport_container_unregister(&i->t.target_attrs); 2316 transport_container_unregister(&i->t.host_attrs); 2317 transport_container_unregister(&i->rport_attr_cont); 2318 transport_container_unregister(&i->vport_attr_cont); 2319 2320 kfree(i); 2321 } 2322 EXPORT_SYMBOL(fc_release_transport); 2323 2324 /** 2325 * fc_queue_work - Queue work to the fc_host workqueue. 2326 * @shost: Pointer to Scsi_Host bound to fc_host. 2327 * @work: Work to queue for execution. 2328 * 2329 * Return value: 2330 * 1 - work queued for execution 2331 * 0 - work is already queued 2332 * -EINVAL - work queue doesn't exist 2333 */ 2334 static int 2335 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2336 { 2337 if (unlikely(!fc_host_work_q(shost))) { 2338 printk(KERN_ERR 2339 "ERROR: FC host '%s' attempted to queue work, " 2340 "when no workqueue created.\n", shost->hostt->name); 2341 dump_stack(); 2342 2343 return -EINVAL; 2344 } 2345 2346 return queue_work(fc_host_work_q(shost), work); 2347 } 2348 2349 /** 2350 * fc_flush_work - Flush a fc_host's workqueue. 2351 * @shost: Pointer to Scsi_Host bound to fc_host. 2352 */ 2353 static void 2354 fc_flush_work(struct Scsi_Host *shost) 2355 { 2356 if (!fc_host_work_q(shost)) { 2357 printk(KERN_ERR 2358 "ERROR: FC host '%s' attempted to flush work, " 2359 "when no workqueue created.\n", shost->hostt->name); 2360 dump_stack(); 2361 return; 2362 } 2363 2364 flush_workqueue(fc_host_work_q(shost)); 2365 } 2366 2367 /** 2368 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2369 * @shost: Pointer to Scsi_Host bound to fc_host. 2370 * @work: Work to queue for execution. 2371 * @delay: jiffies to delay the work queuing 2372 * 2373 * Return value: 2374 * 1 on success / 0 already queued / < 0 for error 2375 */ 2376 static int 2377 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2378 unsigned long delay) 2379 { 2380 if (unlikely(!fc_host_devloss_work_q(shost))) { 2381 printk(KERN_ERR 2382 "ERROR: FC host '%s' attempted to queue work, " 2383 "when no workqueue created.\n", shost->hostt->name); 2384 dump_stack(); 2385 2386 return -EINVAL; 2387 } 2388 2389 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2390 } 2391 2392 /** 2393 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2394 * @shost: Pointer to Scsi_Host bound to fc_host. 2395 */ 2396 static void 2397 fc_flush_devloss(struct Scsi_Host *shost) 2398 { 2399 if (!fc_host_devloss_work_q(shost)) { 2400 printk(KERN_ERR 2401 "ERROR: FC host '%s' attempted to flush work, " 2402 "when no workqueue created.\n", shost->hostt->name); 2403 dump_stack(); 2404 return; 2405 } 2406 2407 flush_workqueue(fc_host_devloss_work_q(shost)); 2408 } 2409 2410 2411 /** 2412 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2413 * @shost: Which &Scsi_Host 2414 * 2415 * This routine is expected to be called immediately preceding the 2416 * a driver's call to scsi_remove_host(). 2417 * 2418 * WARNING: A driver utilizing the fc_transport, which fails to call 2419 * this routine prior to scsi_remove_host(), will leave dangling 2420 * objects in /sys/class/fc_remote_ports. Access to any of these 2421 * objects can result in a system crash !!! 2422 * 2423 * Notes: 2424 * This routine assumes no locks are held on entry. 2425 */ 2426 void 2427 fc_remove_host(struct Scsi_Host *shost) 2428 { 2429 struct fc_vport *vport = NULL, *next_vport = NULL; 2430 struct fc_rport *rport = NULL, *next_rport = NULL; 2431 struct workqueue_struct *work_q; 2432 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2433 unsigned long flags; 2434 2435 spin_lock_irqsave(shost->host_lock, flags); 2436 2437 /* Remove any vports */ 2438 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2439 vport->flags |= FC_VPORT_DELETING; 2440 fc_queue_work(shost, &vport->vport_delete_work); 2441 } 2442 2443 /* Remove any remote ports */ 2444 list_for_each_entry_safe(rport, next_rport, 2445 &fc_host->rports, peers) { 2446 list_del(&rport->peers); 2447 rport->port_state = FC_PORTSTATE_DELETED; 2448 fc_queue_work(shost, &rport->rport_delete_work); 2449 } 2450 2451 list_for_each_entry_safe(rport, next_rport, 2452 &fc_host->rport_bindings, peers) { 2453 list_del(&rport->peers); 2454 rport->port_state = FC_PORTSTATE_DELETED; 2455 fc_queue_work(shost, &rport->rport_delete_work); 2456 } 2457 2458 spin_unlock_irqrestore(shost->host_lock, flags); 2459 2460 /* flush all scan work items */ 2461 scsi_flush_work(shost); 2462 2463 /* flush all stgt delete, and rport delete work items, then kill it */ 2464 if (fc_host->work_q) { 2465 work_q = fc_host->work_q; 2466 fc_host->work_q = NULL; 2467 destroy_workqueue(work_q); 2468 } 2469 2470 /* flush all devloss work items, then kill it */ 2471 if (fc_host->devloss_work_q) { 2472 work_q = fc_host->devloss_work_q; 2473 fc_host->devloss_work_q = NULL; 2474 destroy_workqueue(work_q); 2475 } 2476 } 2477 EXPORT_SYMBOL(fc_remove_host); 2478 2479 static void fc_terminate_rport_io(struct fc_rport *rport) 2480 { 2481 struct Scsi_Host *shost = rport_to_shost(rport); 2482 struct fc_internal *i = to_fc_internal(shost->transportt); 2483 2484 /* Involve the LLDD if possible to terminate all io on the rport. */ 2485 if (i->f->terminate_rport_io) 2486 i->f->terminate_rport_io(rport); 2487 2488 /* 2489 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2490 */ 2491 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2492 } 2493 2494 /** 2495 * fc_starget_delete - called to delete the scsi descendants of an rport 2496 * @work: remote port to be operated on. 2497 * 2498 * Deletes target and all sdevs. 2499 */ 2500 static void 2501 fc_starget_delete(struct work_struct *work) 2502 { 2503 struct fc_rport *rport = 2504 container_of(work, struct fc_rport, stgt_delete_work); 2505 2506 fc_terminate_rport_io(rport); 2507 scsi_remove_target(&rport->dev); 2508 } 2509 2510 2511 /** 2512 * fc_rport_final_delete - finish rport termination and delete it. 2513 * @work: remote port to be deleted. 2514 */ 2515 static void 2516 fc_rport_final_delete(struct work_struct *work) 2517 { 2518 struct fc_rport *rport = 2519 container_of(work, struct fc_rport, rport_delete_work); 2520 struct device *dev = &rport->dev; 2521 struct Scsi_Host *shost = rport_to_shost(rport); 2522 struct fc_internal *i = to_fc_internal(shost->transportt); 2523 unsigned long flags; 2524 int do_callback = 0; 2525 2526 fc_terminate_rport_io(rport); 2527 2528 /* 2529 * if a scan is pending, flush the SCSI Host work_q so that 2530 * that we can reclaim the rport scan work element. 2531 */ 2532 if (rport->flags & FC_RPORT_SCAN_PENDING) 2533 scsi_flush_work(shost); 2534 2535 /* 2536 * Cancel any outstanding timers. These should really exist 2537 * only when rmmod'ing the LLDD and we're asking for 2538 * immediate termination of the rports 2539 */ 2540 spin_lock_irqsave(shost->host_lock, flags); 2541 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2542 spin_unlock_irqrestore(shost->host_lock, flags); 2543 if (!cancel_delayed_work(&rport->fail_io_work)) 2544 fc_flush_devloss(shost); 2545 if (!cancel_delayed_work(&rport->dev_loss_work)) 2546 fc_flush_devloss(shost); 2547 cancel_work_sync(&rport->scan_work); 2548 spin_lock_irqsave(shost->host_lock, flags); 2549 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2550 } 2551 spin_unlock_irqrestore(shost->host_lock, flags); 2552 2553 /* Delete SCSI target and sdevs */ 2554 if (rport->scsi_target_id != -1) 2555 fc_starget_delete(&rport->stgt_delete_work); 2556 2557 /* 2558 * Notify the driver that the rport is now dead. The LLDD will 2559 * also guarantee that any communication to the rport is terminated 2560 * 2561 * Avoid this call if we already called it when we preserved the 2562 * rport for the binding. 2563 */ 2564 spin_lock_irqsave(shost->host_lock, flags); 2565 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2566 (i->f->dev_loss_tmo_callbk)) { 2567 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2568 do_callback = 1; 2569 } 2570 spin_unlock_irqrestore(shost->host_lock, flags); 2571 2572 if (do_callback) 2573 i->f->dev_loss_tmo_callbk(rport); 2574 2575 fc_bsg_remove(rport->rqst_q); 2576 2577 transport_remove_device(dev); 2578 device_del(dev); 2579 transport_destroy_device(dev); 2580 scsi_host_put(shost); /* for fc_host->rport list */ 2581 put_device(dev); /* for self-reference */ 2582 } 2583 2584 2585 /** 2586 * fc_remote_port_create - allocates and creates a remote FC port. 2587 * @shost: scsi host the remote port is connected to. 2588 * @channel: Channel on shost port connected to. 2589 * @ids: The world wide names, fc address, and FC4 port 2590 * roles for the remote port. 2591 * 2592 * Allocates and creates the remoter port structure, including the 2593 * class and sysfs creation. 2594 * 2595 * Notes: 2596 * This routine assumes no locks are held on entry. 2597 */ 2598 static struct fc_rport * 2599 fc_remote_port_create(struct Scsi_Host *shost, int channel, 2600 struct fc_rport_identifiers *ids) 2601 { 2602 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2603 struct fc_internal *fci = to_fc_internal(shost->transportt); 2604 struct fc_rport *rport; 2605 struct device *dev; 2606 unsigned long flags; 2607 int error; 2608 size_t size; 2609 2610 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2611 rport = kzalloc(size, GFP_KERNEL); 2612 if (unlikely(!rport)) { 2613 printk(KERN_ERR "%s: allocation failure\n", __func__); 2614 return NULL; 2615 } 2616 2617 rport->maxframe_size = -1; 2618 rport->supported_classes = FC_COS_UNSPECIFIED; 2619 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2620 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2621 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2622 rport->port_id = ids->port_id; 2623 rport->roles = ids->roles; 2624 rport->port_state = FC_PORTSTATE_ONLINE; 2625 if (fci->f->dd_fcrport_size) 2626 rport->dd_data = &rport[1]; 2627 rport->channel = channel; 2628 rport->fast_io_fail_tmo = -1; 2629 2630 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2631 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2632 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2633 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2634 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2635 2636 spin_lock_irqsave(shost->host_lock, flags); 2637 2638 rport->number = fc_host->next_rport_number++; 2639 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) || 2640 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) 2641 rport->scsi_target_id = fc_host->next_target_id++; 2642 else 2643 rport->scsi_target_id = -1; 2644 list_add_tail(&rport->peers, &fc_host->rports); 2645 scsi_host_get(shost); /* for fc_host->rport list */ 2646 2647 spin_unlock_irqrestore(shost->host_lock, flags); 2648 2649 dev = &rport->dev; 2650 device_initialize(dev); /* takes self reference */ 2651 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2652 dev->release = fc_rport_dev_release; 2653 dev_set_name(dev, "rport-%d:%d-%d", 2654 shost->host_no, channel, rport->number); 2655 transport_setup_device(dev); 2656 2657 error = device_add(dev); 2658 if (error) { 2659 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2660 goto delete_rport; 2661 } 2662 transport_add_device(dev); 2663 transport_configure_device(dev); 2664 2665 fc_bsg_rportadd(shost, rport); 2666 /* ignore any bsg add error - we just can't do sgio */ 2667 2668 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2669 /* initiate a scan of the target */ 2670 rport->flags |= FC_RPORT_SCAN_PENDING; 2671 scsi_queue_work(shost, &rport->scan_work); 2672 } 2673 2674 return rport; 2675 2676 delete_rport: 2677 transport_destroy_device(dev); 2678 spin_lock_irqsave(shost->host_lock, flags); 2679 list_del(&rport->peers); 2680 scsi_host_put(shost); /* for fc_host->rport list */ 2681 spin_unlock_irqrestore(shost->host_lock, flags); 2682 put_device(dev->parent); 2683 kfree(rport); 2684 return NULL; 2685 } 2686 2687 /** 2688 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2689 * @shost: scsi host the remote port is connected to. 2690 * @channel: Channel on shost port connected to. 2691 * @ids: The world wide names, fc address, and FC4 port 2692 * roles for the remote port. 2693 * 2694 * The LLDD calls this routine to notify the transport of the existence 2695 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2696 * of the port, it's FC address (port_id), and the FC4 roles that are 2697 * active for the port. 2698 * 2699 * For ports that are FCP targets (aka scsi targets), the FC transport 2700 * maintains consistent target id bindings on behalf of the LLDD. 2701 * A consistent target id binding is an assignment of a target id to 2702 * a remote port identifier, which persists while the scsi host is 2703 * attached. The remote port can disappear, then later reappear, and 2704 * it's target id assignment remains the same. This allows for shifts 2705 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2706 * changes to the scsi subsystem which is based on scsi host number and 2707 * target id values. Bindings are only valid during the attachment of 2708 * the scsi host. If the host detaches, then later re-attaches, target 2709 * id bindings may change. 2710 * 2711 * This routine is responsible for returning a remote port structure. 2712 * The routine will search the list of remote ports it maintains 2713 * internally on behalf of consistent target id mappings. If found, the 2714 * remote port structure will be reused. Otherwise, a new remote port 2715 * structure will be allocated. 2716 * 2717 * Whenever a remote port is allocated, a new fc_remote_port class 2718 * device is created. 2719 * 2720 * Should not be called from interrupt context. 2721 * 2722 * Notes: 2723 * This routine assumes no locks are held on entry. 2724 */ 2725 struct fc_rport * 2726 fc_remote_port_add(struct Scsi_Host *shost, int channel, 2727 struct fc_rport_identifiers *ids) 2728 { 2729 struct fc_internal *fci = to_fc_internal(shost->transportt); 2730 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2731 struct fc_rport *rport; 2732 unsigned long flags; 2733 int match = 0; 2734 2735 /* ensure any stgt delete functions are done */ 2736 fc_flush_work(shost); 2737 2738 /* 2739 * Search the list of "active" rports, for an rport that has been 2740 * deleted, but we've held off the real delete while the target 2741 * is in a "blocked" state. 2742 */ 2743 spin_lock_irqsave(shost->host_lock, flags); 2744 2745 list_for_each_entry(rport, &fc_host->rports, peers) { 2746 2747 if ((rport->port_state == FC_PORTSTATE_BLOCKED || 2748 rport->port_state == FC_PORTSTATE_NOTPRESENT) && 2749 (rport->channel == channel)) { 2750 2751 switch (fc_host->tgtid_bind_type) { 2752 case FC_TGTID_BIND_BY_WWPN: 2753 case FC_TGTID_BIND_NONE: 2754 if (rport->port_name == ids->port_name) 2755 match = 1; 2756 break; 2757 case FC_TGTID_BIND_BY_WWNN: 2758 if (rport->node_name == ids->node_name) 2759 match = 1; 2760 break; 2761 case FC_TGTID_BIND_BY_ID: 2762 if (rport->port_id == ids->port_id) 2763 match = 1; 2764 break; 2765 } 2766 2767 if (match) { 2768 2769 memcpy(&rport->node_name, &ids->node_name, 2770 sizeof(rport->node_name)); 2771 memcpy(&rport->port_name, &ids->port_name, 2772 sizeof(rport->port_name)); 2773 rport->port_id = ids->port_id; 2774 2775 rport->port_state = FC_PORTSTATE_ONLINE; 2776 rport->roles = ids->roles; 2777 2778 spin_unlock_irqrestore(shost->host_lock, flags); 2779 2780 if (fci->f->dd_fcrport_size) 2781 memset(rport->dd_data, 0, 2782 fci->f->dd_fcrport_size); 2783 2784 /* 2785 * If we were not a target, cancel the 2786 * io terminate and rport timers, and 2787 * we're done. 2788 * 2789 * If we were a target, but our new role 2790 * doesn't indicate a target, leave the 2791 * timers running expecting the role to 2792 * change as the target fully logs in. If 2793 * it doesn't, the target will be torn down. 2794 * 2795 * If we were a target, and our role shows 2796 * we're still a target, cancel the timers 2797 * and kick off a scan. 2798 */ 2799 2800 /* was a target, not in roles */ 2801 if ((rport->scsi_target_id != -1) && 2802 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2803 return rport; 2804 2805 /* 2806 * Stop the fail io and dev_loss timers. 2807 * If they flush, the port_state will 2808 * be checked and will NOOP the function. 2809 */ 2810 if (!cancel_delayed_work(&rport->fail_io_work)) 2811 fc_flush_devloss(shost); 2812 if (!cancel_delayed_work(&rport->dev_loss_work)) 2813 fc_flush_devloss(shost); 2814 2815 spin_lock_irqsave(shost->host_lock, flags); 2816 2817 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2818 FC_RPORT_DEVLOSS_PENDING | 2819 FC_RPORT_DEVLOSS_CALLBK_DONE); 2820 2821 spin_unlock_irqrestore(shost->host_lock, flags); 2822 2823 /* if target, initiate a scan */ 2824 if (rport->scsi_target_id != -1) { 2825 scsi_target_unblock(&rport->dev, 2826 SDEV_RUNNING); 2827 spin_lock_irqsave(shost->host_lock, 2828 flags); 2829 rport->flags |= FC_RPORT_SCAN_PENDING; 2830 scsi_queue_work(shost, 2831 &rport->scan_work); 2832 spin_unlock_irqrestore(shost->host_lock, 2833 flags); 2834 } 2835 2836 fc_bsg_goose_queue(rport); 2837 2838 return rport; 2839 } 2840 } 2841 } 2842 2843 /* 2844 * Search the bindings array 2845 * Note: if never a FCP target, you won't be on this list 2846 */ 2847 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2848 2849 /* search for a matching consistent binding */ 2850 2851 list_for_each_entry(rport, &fc_host->rport_bindings, 2852 peers) { 2853 if (rport->channel != channel) 2854 continue; 2855 2856 switch (fc_host->tgtid_bind_type) { 2857 case FC_TGTID_BIND_BY_WWPN: 2858 if (rport->port_name == ids->port_name) 2859 match = 1; 2860 break; 2861 case FC_TGTID_BIND_BY_WWNN: 2862 if (rport->node_name == ids->node_name) 2863 match = 1; 2864 break; 2865 case FC_TGTID_BIND_BY_ID: 2866 if (rport->port_id == ids->port_id) 2867 match = 1; 2868 break; 2869 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2870 break; 2871 } 2872 2873 if (match) { 2874 list_move_tail(&rport->peers, &fc_host->rports); 2875 break; 2876 } 2877 } 2878 2879 if (match) { 2880 memcpy(&rport->node_name, &ids->node_name, 2881 sizeof(rport->node_name)); 2882 memcpy(&rport->port_name, &ids->port_name, 2883 sizeof(rport->port_name)); 2884 rport->port_id = ids->port_id; 2885 rport->port_state = FC_PORTSTATE_ONLINE; 2886 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2887 2888 if (fci->f->dd_fcrport_size) 2889 memset(rport->dd_data, 0, 2890 fci->f->dd_fcrport_size); 2891 spin_unlock_irqrestore(shost->host_lock, flags); 2892 2893 fc_remote_port_rolechg(rport, ids->roles); 2894 return rport; 2895 } 2896 } 2897 2898 spin_unlock_irqrestore(shost->host_lock, flags); 2899 2900 /* No consistent binding found - create new remote port entry */ 2901 rport = fc_remote_port_create(shost, channel, ids); 2902 2903 return rport; 2904 } 2905 EXPORT_SYMBOL(fc_remote_port_add); 2906 2907 2908 /** 2909 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2910 * @rport: The remote port that no longer exists 2911 * 2912 * The LLDD calls this routine to notify the transport that a remote 2913 * port is no longer part of the topology. Note: Although a port 2914 * may no longer be part of the topology, it may persist in the remote 2915 * ports displayed by the fc_host. We do this under 2 conditions: 2916 * 2917 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2918 * This allows the port to temporarily disappear, then reappear without 2919 * disrupting the SCSI device tree attached to it. During the "blocked" 2920 * period the port will still exist. 2921 * 2922 * 2) If the port was a scsi target and disappears for longer than we 2923 * expect, we'll delete the port and the tear down the SCSI device tree 2924 * attached to it. However, we want to semi-persist the target id assigned 2925 * to that port if it eventually does exist. The port structure will 2926 * remain (although with minimal information) so that the target id 2927 * bindings also remain. 2928 * 2929 * If the remote port is not an FCP Target, it will be fully torn down 2930 * and deallocated, including the fc_remote_port class device. 2931 * 2932 * If the remote port is an FCP Target, the port will be placed in a 2933 * temporary blocked state. From the LLDD's perspective, the rport no 2934 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2935 * exists, but all sdevs on it are blocked from further I/O. The following 2936 * is then expected. 2937 * 2938 * If the remote port does not return (signaled by a LLDD call to 2939 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2940 * scsi target is removed - killing all outstanding i/o and removing the 2941 * scsi devices attached to it. The port structure will be marked Not 2942 * Present and be partially cleared, leaving only enough information to 2943 * recognize the remote port relative to the scsi target id binding if 2944 * it later appears. The port will remain as long as there is a valid 2945 * binding (e.g. until the user changes the binding type or unloads the 2946 * scsi host with the binding). 2947 * 2948 * If the remote port returns within the dev_loss_tmo value (and matches 2949 * according to the target id binding type), the port structure will be 2950 * reused. If it is no longer a SCSI target, the target will be torn 2951 * down. If it continues to be a SCSI target, then the target will be 2952 * unblocked (allowing i/o to be resumed), and a scan will be activated 2953 * to ensure that all luns are detected. 2954 * 2955 * Called from normal process context only - cannot be called from interrupt. 2956 * 2957 * Notes: 2958 * This routine assumes no locks are held on entry. 2959 */ 2960 void 2961 fc_remote_port_delete(struct fc_rport *rport) 2962 { 2963 struct Scsi_Host *shost = rport_to_shost(rport); 2964 unsigned long timeout = rport->dev_loss_tmo; 2965 unsigned long flags; 2966 2967 /* 2968 * No need to flush the fc_host work_q's, as all adds are synchronous. 2969 * 2970 * We do need to reclaim the rport scan work element, so eventually 2971 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2972 * there's still a scan pending. 2973 */ 2974 2975 spin_lock_irqsave(shost->host_lock, flags); 2976 2977 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2978 spin_unlock_irqrestore(shost->host_lock, flags); 2979 return; 2980 } 2981 2982 /* 2983 * In the past, we if this was not an FCP-Target, we would 2984 * unconditionally just jump to deleting the rport. 2985 * However, rports can be used as node containers by the LLDD, 2986 * and its not appropriate to just terminate the rport at the 2987 * first sign of a loss in connectivity. The LLDD may want to 2988 * send ELS traffic to re-validate the login. If the rport is 2989 * immediately deleted, it makes it inappropriate for a node 2990 * container. 2991 * So... we now unconditionally wait dev_loss_tmo before 2992 * destroying an rport. 2993 */ 2994 2995 rport->port_state = FC_PORTSTATE_BLOCKED; 2996 2997 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 2998 2999 spin_unlock_irqrestore(shost->host_lock, flags); 3000 3001 scsi_target_block(&rport->dev); 3002 3003 /* see if we need to kill io faster than waiting for device loss */ 3004 if ((rport->fast_io_fail_tmo != -1) && 3005 (rport->fast_io_fail_tmo < timeout)) 3006 fc_queue_devloss_work(shost, &rport->fail_io_work, 3007 rport->fast_io_fail_tmo * HZ); 3008 3009 /* cap the length the devices can be blocked until they are deleted */ 3010 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3011 } 3012 EXPORT_SYMBOL(fc_remote_port_delete); 3013 3014 /** 3015 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3016 * @rport: The remote port that changed. 3017 * @roles: New roles for this port. 3018 * 3019 * Description: The LLDD calls this routine to notify the transport that the 3020 * roles on a remote port may have changed. The largest effect of this is 3021 * if a port now becomes a FCP Target, it must be allocated a 3022 * scsi target id. If the port is no longer a FCP target, any 3023 * scsi target id value assigned to it will persist in case the 3024 * role changes back to include FCP Target. No changes in the scsi 3025 * midlayer will be invoked if the role changes (in the expectation 3026 * that the role will be resumed. If it doesn't normal error processing 3027 * will take place). 3028 * 3029 * Should not be called from interrupt context. 3030 * 3031 * Notes: 3032 * This routine assumes no locks are held on entry. 3033 */ 3034 void 3035 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3036 { 3037 struct Scsi_Host *shost = rport_to_shost(rport); 3038 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3039 unsigned long flags; 3040 int create = 0; 3041 3042 spin_lock_irqsave(shost->host_lock, flags); 3043 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3044 if (rport->scsi_target_id == -1) { 3045 rport->scsi_target_id = fc_host->next_target_id++; 3046 create = 1; 3047 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3048 create = 1; 3049 } 3050 3051 rport->roles = roles; 3052 3053 spin_unlock_irqrestore(shost->host_lock, flags); 3054 3055 if (create) { 3056 /* 3057 * There may have been a delete timer running on the 3058 * port. Ensure that it is cancelled as we now know 3059 * the port is an FCP Target. 3060 * Note: we know the rport exists and is in an online 3061 * state as the LLDD would not have had an rport 3062 * reference to pass us. 3063 * 3064 * Take no action on the del_timer failure as the state 3065 * machine state change will validate the 3066 * transaction. 3067 */ 3068 if (!cancel_delayed_work(&rport->fail_io_work)) 3069 fc_flush_devloss(shost); 3070 if (!cancel_delayed_work(&rport->dev_loss_work)) 3071 fc_flush_devloss(shost); 3072 3073 spin_lock_irqsave(shost->host_lock, flags); 3074 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3075 FC_RPORT_DEVLOSS_PENDING | 3076 FC_RPORT_DEVLOSS_CALLBK_DONE); 3077 spin_unlock_irqrestore(shost->host_lock, flags); 3078 3079 /* ensure any stgt delete functions are done */ 3080 fc_flush_work(shost); 3081 3082 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3083 /* initiate a scan of the target */ 3084 spin_lock_irqsave(shost->host_lock, flags); 3085 rport->flags |= FC_RPORT_SCAN_PENDING; 3086 scsi_queue_work(shost, &rport->scan_work); 3087 spin_unlock_irqrestore(shost->host_lock, flags); 3088 } 3089 } 3090 EXPORT_SYMBOL(fc_remote_port_rolechg); 3091 3092 /** 3093 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3094 * @work: rport target that failed to reappear in the allotted time. 3095 * 3096 * Description: An attempt to delete a remote port blocks, and if it fails 3097 * to return in the allotted time this gets called. 3098 */ 3099 static void 3100 fc_timeout_deleted_rport(struct work_struct *work) 3101 { 3102 struct fc_rport *rport = 3103 container_of(work, struct fc_rport, dev_loss_work.work); 3104 struct Scsi_Host *shost = rport_to_shost(rport); 3105 struct fc_internal *i = to_fc_internal(shost->transportt); 3106 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3107 unsigned long flags; 3108 int do_callback = 0; 3109 3110 spin_lock_irqsave(shost->host_lock, flags); 3111 3112 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3113 3114 /* 3115 * If the port is ONLINE, then it came back. If it was a SCSI 3116 * target, validate it still is. If not, tear down the 3117 * scsi_target on it. 3118 */ 3119 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3120 (rport->scsi_target_id != -1) && 3121 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3122 dev_printk(KERN_ERR, &rport->dev, 3123 "blocked FC remote port time out: no longer" 3124 " a FCP target, removing starget\n"); 3125 spin_unlock_irqrestore(shost->host_lock, flags); 3126 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3127 fc_queue_work(shost, &rport->stgt_delete_work); 3128 return; 3129 } 3130 3131 /* NOOP state - we're flushing workq's */ 3132 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3133 spin_unlock_irqrestore(shost->host_lock, flags); 3134 dev_printk(KERN_ERR, &rport->dev, 3135 "blocked FC remote port time out: leaving" 3136 " rport%s alone\n", 3137 (rport->scsi_target_id != -1) ? " and starget" : ""); 3138 return; 3139 } 3140 3141 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3142 (rport->scsi_target_id == -1)) { 3143 list_del(&rport->peers); 3144 rport->port_state = FC_PORTSTATE_DELETED; 3145 dev_printk(KERN_ERR, &rport->dev, 3146 "blocked FC remote port time out: removing" 3147 " rport%s\n", 3148 (rport->scsi_target_id != -1) ? " and starget" : ""); 3149 fc_queue_work(shost, &rport->rport_delete_work); 3150 spin_unlock_irqrestore(shost->host_lock, flags); 3151 return; 3152 } 3153 3154 dev_printk(KERN_ERR, &rport->dev, 3155 "blocked FC remote port time out: removing target and " 3156 "saving binding\n"); 3157 3158 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3159 3160 /* 3161 * Note: We do not remove or clear the hostdata area. This allows 3162 * host-specific target data to persist along with the 3163 * scsi_target_id. It's up to the host to manage it's hostdata area. 3164 */ 3165 3166 /* 3167 * Reinitialize port attributes that may change if the port comes back. 3168 */ 3169 rport->maxframe_size = -1; 3170 rport->supported_classes = FC_COS_UNSPECIFIED; 3171 rport->roles = FC_PORT_ROLE_UNKNOWN; 3172 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3173 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3174 3175 /* 3176 * Pre-emptively kill I/O rather than waiting for the work queue 3177 * item to teardown the starget. (FCOE libFC folks prefer this 3178 * and to have the rport_port_id still set when it's done). 3179 */ 3180 spin_unlock_irqrestore(shost->host_lock, flags); 3181 fc_terminate_rport_io(rport); 3182 3183 spin_lock_irqsave(shost->host_lock, flags); 3184 3185 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3186 3187 /* remove the identifiers that aren't used in the consisting binding */ 3188 switch (fc_host->tgtid_bind_type) { 3189 case FC_TGTID_BIND_BY_WWPN: 3190 rport->node_name = -1; 3191 rport->port_id = -1; 3192 break; 3193 case FC_TGTID_BIND_BY_WWNN: 3194 rport->port_name = -1; 3195 rport->port_id = -1; 3196 break; 3197 case FC_TGTID_BIND_BY_ID: 3198 rport->node_name = -1; 3199 rport->port_name = -1; 3200 break; 3201 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3202 break; 3203 } 3204 3205 /* 3206 * As this only occurs if the remote port (scsi target) 3207 * went away and didn't come back - we'll remove 3208 * all attached scsi devices. 3209 */ 3210 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3211 fc_queue_work(shost, &rport->stgt_delete_work); 3212 3213 do_callback = 1; 3214 } 3215 3216 spin_unlock_irqrestore(shost->host_lock, flags); 3217 3218 /* 3219 * Notify the driver that the rport is now dead. The LLDD will 3220 * also guarantee that any communication to the rport is terminated 3221 * 3222 * Note: we set the CALLBK_DONE flag above to correspond 3223 */ 3224 if (do_callback && i->f->dev_loss_tmo_callbk) 3225 i->f->dev_loss_tmo_callbk(rport); 3226 } 3227 3228 3229 /** 3230 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3231 * @work: rport to terminate io on. 3232 * 3233 * Notes: Only requests the failure of the io, not that all are flushed 3234 * prior to returning. 3235 */ 3236 static void 3237 fc_timeout_fail_rport_io(struct work_struct *work) 3238 { 3239 struct fc_rport *rport = 3240 container_of(work, struct fc_rport, fail_io_work.work); 3241 3242 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3243 return; 3244 3245 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3246 fc_terminate_rport_io(rport); 3247 } 3248 3249 /** 3250 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3251 * @work: remote port to be scanned. 3252 */ 3253 static void 3254 fc_scsi_scan_rport(struct work_struct *work) 3255 { 3256 struct fc_rport *rport = 3257 container_of(work, struct fc_rport, scan_work); 3258 struct Scsi_Host *shost = rport_to_shost(rport); 3259 struct fc_internal *i = to_fc_internal(shost->transportt); 3260 unsigned long flags; 3261 3262 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3263 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3264 !(i->f->disable_target_scan)) { 3265 scsi_scan_target(&rport->dev, rport->channel, 3266 rport->scsi_target_id, SCAN_WILD_CARD, 3267 SCSI_SCAN_RESCAN); 3268 } 3269 3270 spin_lock_irqsave(shost->host_lock, flags); 3271 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3272 spin_unlock_irqrestore(shost->host_lock, flags); 3273 } 3274 3275 /** 3276 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport. 3277 * @rport: Remote port that scsi_eh is trying to recover. 3278 * 3279 * This routine can be called from a FC LLD scsi_eh callback. It 3280 * blocks the scsi_eh thread until the fc_rport leaves the 3281 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3282 * necessary to avoid the scsi_eh failing recovery actions for blocked 3283 * rports which would lead to offlined SCSI devices. 3284 * 3285 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3286 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3287 * passed back to scsi_eh. 3288 */ 3289 int fc_block_rport(struct fc_rport *rport) 3290 { 3291 struct Scsi_Host *shost = rport_to_shost(rport); 3292 unsigned long flags; 3293 3294 spin_lock_irqsave(shost->host_lock, flags); 3295 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3296 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3297 spin_unlock_irqrestore(shost->host_lock, flags); 3298 msleep(1000); 3299 spin_lock_irqsave(shost->host_lock, flags); 3300 } 3301 spin_unlock_irqrestore(shost->host_lock, flags); 3302 3303 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3304 return FAST_IO_FAIL; 3305 3306 return 0; 3307 } 3308 EXPORT_SYMBOL(fc_block_rport); 3309 3310 /** 3311 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3312 * @cmnd: SCSI command that scsi_eh is trying to recover 3313 * 3314 * This routine can be called from a FC LLD scsi_eh callback. It 3315 * blocks the scsi_eh thread until the fc_rport leaves the 3316 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3317 * necessary to avoid the scsi_eh failing recovery actions for blocked 3318 * rports which would lead to offlined SCSI devices. 3319 * 3320 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3321 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3322 * passed back to scsi_eh. 3323 */ 3324 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3325 { 3326 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3327 3328 if (WARN_ON_ONCE(!rport)) 3329 return FAST_IO_FAIL; 3330 3331 return fc_block_rport(rport); 3332 } 3333 EXPORT_SYMBOL(fc_block_scsi_eh); 3334 3335 /** 3336 * fc_vport_setup - allocates and creates a FC virtual port. 3337 * @shost: scsi host the virtual port is connected to. 3338 * @channel: Channel on shost port connected to. 3339 * @pdev: parent device for vport 3340 * @ids: The world wide names, FC4 port roles, etc for 3341 * the virtual port. 3342 * @ret_vport: The pointer to the created vport. 3343 * 3344 * Allocates and creates the vport structure, calls the parent host 3345 * to instantiate the vport, this completes w/ class and sysfs creation. 3346 * 3347 * Notes: 3348 * This routine assumes no locks are held on entry. 3349 */ 3350 static int 3351 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3352 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3353 { 3354 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3355 struct fc_internal *fci = to_fc_internal(shost->transportt); 3356 struct fc_vport *vport; 3357 struct device *dev; 3358 unsigned long flags; 3359 size_t size; 3360 int error; 3361 3362 *ret_vport = NULL; 3363 3364 if ( ! fci->f->vport_create) 3365 return -ENOENT; 3366 3367 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3368 vport = kzalloc(size, GFP_KERNEL); 3369 if (unlikely(!vport)) { 3370 printk(KERN_ERR "%s: allocation failure\n", __func__); 3371 return -ENOMEM; 3372 } 3373 3374 vport->vport_state = FC_VPORT_UNKNOWN; 3375 vport->vport_last_state = FC_VPORT_UNKNOWN; 3376 vport->node_name = ids->node_name; 3377 vport->port_name = ids->port_name; 3378 vport->roles = ids->roles; 3379 vport->vport_type = ids->vport_type; 3380 if (fci->f->dd_fcvport_size) 3381 vport->dd_data = &vport[1]; 3382 vport->shost = shost; 3383 vport->channel = channel; 3384 vport->flags = FC_VPORT_CREATING; 3385 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3386 3387 spin_lock_irqsave(shost->host_lock, flags); 3388 3389 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3390 spin_unlock_irqrestore(shost->host_lock, flags); 3391 kfree(vport); 3392 return -ENOSPC; 3393 } 3394 fc_host->npiv_vports_inuse++; 3395 vport->number = fc_host->next_vport_number++; 3396 list_add_tail(&vport->peers, &fc_host->vports); 3397 scsi_host_get(shost); /* for fc_host->vport list */ 3398 3399 spin_unlock_irqrestore(shost->host_lock, flags); 3400 3401 dev = &vport->dev; 3402 device_initialize(dev); /* takes self reference */ 3403 dev->parent = get_device(pdev); /* takes parent reference */ 3404 dev->release = fc_vport_dev_release; 3405 dev_set_name(dev, "vport-%d:%d-%d", 3406 shost->host_no, channel, vport->number); 3407 transport_setup_device(dev); 3408 3409 error = device_add(dev); 3410 if (error) { 3411 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3412 goto delete_vport; 3413 } 3414 transport_add_device(dev); 3415 transport_configure_device(dev); 3416 3417 error = fci->f->vport_create(vport, ids->disable); 3418 if (error) { 3419 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3420 goto delete_vport_all; 3421 } 3422 3423 /* 3424 * if the parent isn't the physical adapter's Scsi_Host, ensure 3425 * the Scsi_Host at least contains a symlink to the vport. 3426 */ 3427 if (pdev != &shost->shost_gendev) { 3428 error = sysfs_create_link(&shost->shost_gendev.kobj, 3429 &dev->kobj, dev_name(dev)); 3430 if (error) 3431 printk(KERN_ERR 3432 "%s: Cannot create vport symlinks for " 3433 "%s, err=%d\n", 3434 __func__, dev_name(dev), error); 3435 } 3436 spin_lock_irqsave(shost->host_lock, flags); 3437 vport->flags &= ~FC_VPORT_CREATING; 3438 spin_unlock_irqrestore(shost->host_lock, flags); 3439 3440 dev_printk(KERN_NOTICE, pdev, 3441 "%s created via shost%d channel %d\n", dev_name(dev), 3442 shost->host_no, channel); 3443 3444 *ret_vport = vport; 3445 3446 return 0; 3447 3448 delete_vport_all: 3449 transport_remove_device(dev); 3450 device_del(dev); 3451 delete_vport: 3452 transport_destroy_device(dev); 3453 spin_lock_irqsave(shost->host_lock, flags); 3454 list_del(&vport->peers); 3455 scsi_host_put(shost); /* for fc_host->vport list */ 3456 fc_host->npiv_vports_inuse--; 3457 spin_unlock_irqrestore(shost->host_lock, flags); 3458 put_device(dev->parent); 3459 kfree(vport); 3460 3461 return error; 3462 } 3463 3464 /** 3465 * fc_vport_create - Admin App or LLDD requests creation of a vport 3466 * @shost: scsi host the virtual port is connected to. 3467 * @channel: channel on shost port connected to. 3468 * @ids: The world wide names, FC4 port roles, etc for 3469 * the virtual port. 3470 * 3471 * Notes: 3472 * This routine assumes no locks are held on entry. 3473 */ 3474 struct fc_vport * 3475 fc_vport_create(struct Scsi_Host *shost, int channel, 3476 struct fc_vport_identifiers *ids) 3477 { 3478 int stat; 3479 struct fc_vport *vport; 3480 3481 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3482 ids, &vport); 3483 return stat ? NULL : vport; 3484 } 3485 EXPORT_SYMBOL(fc_vport_create); 3486 3487 /** 3488 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3489 * @vport: fc_vport to be terminated 3490 * 3491 * Calls the LLDD vport_delete() function, then deallocates and removes 3492 * the vport from the shost and object tree. 3493 * 3494 * Notes: 3495 * This routine assumes no locks are held on entry. 3496 */ 3497 int 3498 fc_vport_terminate(struct fc_vport *vport) 3499 { 3500 struct Scsi_Host *shost = vport_to_shost(vport); 3501 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3502 struct fc_internal *i = to_fc_internal(shost->transportt); 3503 struct device *dev = &vport->dev; 3504 unsigned long flags; 3505 int stat; 3506 3507 if (i->f->vport_delete) 3508 stat = i->f->vport_delete(vport); 3509 else 3510 stat = -ENOENT; 3511 3512 spin_lock_irqsave(shost->host_lock, flags); 3513 vport->flags &= ~FC_VPORT_DELETING; 3514 if (!stat) { 3515 vport->flags |= FC_VPORT_DELETED; 3516 list_del(&vport->peers); 3517 fc_host->npiv_vports_inuse--; 3518 scsi_host_put(shost); /* for fc_host->vport list */ 3519 } 3520 spin_unlock_irqrestore(shost->host_lock, flags); 3521 3522 if (stat) 3523 return stat; 3524 3525 if (dev->parent != &shost->shost_gendev) 3526 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3527 transport_remove_device(dev); 3528 device_del(dev); 3529 transport_destroy_device(dev); 3530 3531 /* 3532 * Removing our self-reference should mean our 3533 * release function gets called, which will drop the remaining 3534 * parent reference and free the data structure. 3535 */ 3536 put_device(dev); /* for self-reference */ 3537 3538 return 0; /* SUCCESS */ 3539 } 3540 EXPORT_SYMBOL(fc_vport_terminate); 3541 3542 /** 3543 * fc_vport_sched_delete - workq-based delete request for a vport 3544 * @work: vport to be deleted. 3545 */ 3546 static void 3547 fc_vport_sched_delete(struct work_struct *work) 3548 { 3549 struct fc_vport *vport = 3550 container_of(work, struct fc_vport, vport_delete_work); 3551 int stat; 3552 3553 stat = fc_vport_terminate(vport); 3554 if (stat) 3555 dev_printk(KERN_ERR, vport->dev.parent, 3556 "%s: %s could not be deleted created via " 3557 "shost%d channel %d - error %d\n", __func__, 3558 dev_name(&vport->dev), vport->shost->host_no, 3559 vport->channel, stat); 3560 } 3561 3562 3563 /* 3564 * BSG support 3565 */ 3566 3567 /** 3568 * fc_bsg_job_timeout - handler for when a bsg request timesout 3569 * @req: request that timed out 3570 */ 3571 static enum blk_eh_timer_return 3572 fc_bsg_job_timeout(struct request *req) 3573 { 3574 struct bsg_job *job = blk_mq_rq_to_pdu(req); 3575 struct Scsi_Host *shost = fc_bsg_to_shost(job); 3576 struct fc_rport *rport = fc_bsg_to_rport(job); 3577 struct fc_internal *i = to_fc_internal(shost->transportt); 3578 int err = 0, inflight = 0; 3579 3580 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) 3581 return BLK_EH_RESET_TIMER; 3582 3583 inflight = bsg_job_get(job); 3584 3585 if (inflight && i->f->bsg_timeout) { 3586 /* call LLDD to abort the i/o as it has timed out */ 3587 err = i->f->bsg_timeout(job); 3588 if (err == -EAGAIN) { 3589 bsg_job_put(job); 3590 return BLK_EH_RESET_TIMER; 3591 } else if (err) 3592 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3593 "abort failed with status %d\n", err); 3594 } 3595 3596 /* the blk_end_sync_io() doesn't check the error */ 3597 if (inflight) 3598 blk_mq_end_request(req, BLK_STS_IOERR); 3599 return BLK_EH_DONE; 3600 } 3601 3602 /** 3603 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3604 * @shost: scsi host rport attached to 3605 * @job: bsg job to be processed 3606 */ 3607 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 3608 { 3609 struct fc_internal *i = to_fc_internal(shost->transportt); 3610 struct fc_bsg_request *bsg_request = job->request; 3611 struct fc_bsg_reply *bsg_reply = job->reply; 3612 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3613 int ret; 3614 3615 /* check if we really have all the request data needed */ 3616 if (job->request_len < cmdlen) { 3617 ret = -ENOMSG; 3618 goto fail_host_msg; 3619 } 3620 3621 /* Validate the host command */ 3622 switch (bsg_request->msgcode) { 3623 case FC_BSG_HST_ADD_RPORT: 3624 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3625 break; 3626 3627 case FC_BSG_HST_DEL_RPORT: 3628 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3629 break; 3630 3631 case FC_BSG_HST_ELS_NOLOGIN: 3632 cmdlen += sizeof(struct fc_bsg_host_els); 3633 /* there better be a xmt and rcv payloads */ 3634 if ((!job->request_payload.payload_len) || 3635 (!job->reply_payload.payload_len)) { 3636 ret = -EINVAL; 3637 goto fail_host_msg; 3638 } 3639 break; 3640 3641 case FC_BSG_HST_CT: 3642 cmdlen += sizeof(struct fc_bsg_host_ct); 3643 /* there better be xmt and rcv payloads */ 3644 if ((!job->request_payload.payload_len) || 3645 (!job->reply_payload.payload_len)) { 3646 ret = -EINVAL; 3647 goto fail_host_msg; 3648 } 3649 break; 3650 3651 case FC_BSG_HST_VENDOR: 3652 cmdlen += sizeof(struct fc_bsg_host_vendor); 3653 if ((shost->hostt->vendor_id == 0L) || 3654 (bsg_request->rqst_data.h_vendor.vendor_id != 3655 shost->hostt->vendor_id)) { 3656 ret = -ESRCH; 3657 goto fail_host_msg; 3658 } 3659 break; 3660 3661 default: 3662 ret = -EBADR; 3663 goto fail_host_msg; 3664 } 3665 3666 ret = i->f->bsg_request(job); 3667 if (!ret) 3668 return 0; 3669 3670 fail_host_msg: 3671 /* return the errno failure code as the only status */ 3672 BUG_ON(job->reply_len < sizeof(uint32_t)); 3673 bsg_reply->reply_payload_rcv_len = 0; 3674 bsg_reply->result = ret; 3675 job->reply_len = sizeof(uint32_t); 3676 bsg_job_done(job, bsg_reply->result, 3677 bsg_reply->reply_payload_rcv_len); 3678 return 0; 3679 } 3680 3681 3682 /* 3683 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3684 * @rport: rport to be restarted 3685 */ 3686 static void 3687 fc_bsg_goose_queue(struct fc_rport *rport) 3688 { 3689 struct request_queue *q = rport->rqst_q; 3690 3691 if (q) 3692 blk_mq_run_hw_queues(q, true); 3693 } 3694 3695 /** 3696 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3697 * @shost: scsi host rport attached to 3698 * @job: bsg job to be processed 3699 */ 3700 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 3701 { 3702 struct fc_internal *i = to_fc_internal(shost->transportt); 3703 struct fc_bsg_request *bsg_request = job->request; 3704 struct fc_bsg_reply *bsg_reply = job->reply; 3705 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3706 int ret; 3707 3708 /* check if we really have all the request data needed */ 3709 if (job->request_len < cmdlen) { 3710 ret = -ENOMSG; 3711 goto fail_rport_msg; 3712 } 3713 3714 /* Validate the rport command */ 3715 switch (bsg_request->msgcode) { 3716 case FC_BSG_RPT_ELS: 3717 cmdlen += sizeof(struct fc_bsg_rport_els); 3718 goto check_bidi; 3719 3720 case FC_BSG_RPT_CT: 3721 cmdlen += sizeof(struct fc_bsg_rport_ct); 3722 check_bidi: 3723 /* there better be xmt and rcv payloads */ 3724 if ((!job->request_payload.payload_len) || 3725 (!job->reply_payload.payload_len)) { 3726 ret = -EINVAL; 3727 goto fail_rport_msg; 3728 } 3729 break; 3730 default: 3731 ret = -EBADR; 3732 goto fail_rport_msg; 3733 } 3734 3735 ret = i->f->bsg_request(job); 3736 if (!ret) 3737 return 0; 3738 3739 fail_rport_msg: 3740 /* return the errno failure code as the only status */ 3741 BUG_ON(job->reply_len < sizeof(uint32_t)); 3742 bsg_reply->reply_payload_rcv_len = 0; 3743 bsg_reply->result = ret; 3744 job->reply_len = sizeof(uint32_t); 3745 bsg_job_done(job, bsg_reply->result, 3746 bsg_reply->reply_payload_rcv_len); 3747 return 0; 3748 } 3749 3750 static int fc_bsg_dispatch(struct bsg_job *job) 3751 { 3752 struct Scsi_Host *shost = fc_bsg_to_shost(job); 3753 3754 if (scsi_is_fc_rport(job->dev)) 3755 return fc_bsg_rport_dispatch(shost, job); 3756 else 3757 return fc_bsg_host_dispatch(shost, job); 3758 } 3759 3760 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport) 3761 { 3762 if (rport->port_state == FC_PORTSTATE_BLOCKED && 3763 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3764 return BLK_STS_RESOURCE; 3765 3766 if (rport->port_state != FC_PORTSTATE_ONLINE) 3767 return BLK_STS_IOERR; 3768 3769 return BLK_STS_OK; 3770 } 3771 3772 3773 static int fc_bsg_dispatch_prep(struct bsg_job *job) 3774 { 3775 struct fc_rport *rport = fc_bsg_to_rport(job); 3776 blk_status_t ret; 3777 3778 ret = fc_bsg_rport_prep(rport); 3779 switch (ret) { 3780 case BLK_STS_OK: 3781 break; 3782 case BLK_STS_RESOURCE: 3783 return -EAGAIN; 3784 default: 3785 return -EIO; 3786 } 3787 3788 return fc_bsg_dispatch(job); 3789 } 3790 3791 /** 3792 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 3793 * @shost: shost for fc_host 3794 * @fc_host: fc_host adding the structures to 3795 */ 3796 static int 3797 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 3798 { 3799 struct device *dev = &shost->shost_gendev; 3800 struct fc_internal *i = to_fc_internal(shost->transportt); 3801 struct request_queue *q; 3802 char bsg_name[20]; 3803 3804 fc_host->rqst_q = NULL; 3805 3806 if (!i->f->bsg_request) 3807 return -ENOTSUPP; 3808 3809 snprintf(bsg_name, sizeof(bsg_name), 3810 "fc_host%d", shost->host_no); 3811 3812 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout, 3813 i->f->dd_bsg_size); 3814 if (IS_ERR(q)) { 3815 dev_err(dev, 3816 "fc_host%d: bsg interface failed to initialize - setup queue\n", 3817 shost->host_no); 3818 return PTR_ERR(q); 3819 } 3820 __scsi_init_queue(shost, q); 3821 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 3822 fc_host->rqst_q = q; 3823 return 0; 3824 } 3825 3826 /** 3827 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 3828 * @shost: shost that rport is attached to 3829 * @rport: rport that the bsg hooks are being attached to 3830 */ 3831 static int 3832 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 3833 { 3834 struct device *dev = &rport->dev; 3835 struct fc_internal *i = to_fc_internal(shost->transportt); 3836 struct request_queue *q; 3837 3838 rport->rqst_q = NULL; 3839 3840 if (!i->f->bsg_request) 3841 return -ENOTSUPP; 3842 3843 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep, 3844 fc_bsg_job_timeout, i->f->dd_bsg_size); 3845 if (IS_ERR(q)) { 3846 dev_err(dev, "failed to setup bsg queue\n"); 3847 return PTR_ERR(q); 3848 } 3849 __scsi_init_queue(shost, q); 3850 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 3851 rport->rqst_q = q; 3852 return 0; 3853 } 3854 3855 3856 /** 3857 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 3858 * @q: the request_queue that is to be torn down. 3859 * 3860 * Notes: 3861 * Before unregistering the queue empty any requests that are blocked 3862 * 3863 * 3864 */ 3865 static void 3866 fc_bsg_remove(struct request_queue *q) 3867 { 3868 bsg_remove_queue(q); 3869 } 3870 3871 3872 /* Original Author: Martin Hicks */ 3873 MODULE_AUTHOR("James Smart"); 3874 MODULE_DESCRIPTION("FC Transport Attributes"); 3875 MODULE_LICENSE("GPL"); 3876 3877 module_init(fc_transport_init); 3878 module_exit(fc_transport_exit); 3879