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 <scsi/scsi_device.h> 34 #include <scsi/scsi_host.h> 35 #include <scsi/scsi_transport.h> 36 #include <scsi/scsi_transport_fc.h> 37 #include <scsi/scsi_cmnd.h> 38 #include <net/netlink.h> 39 #include <scsi/scsi_netlink_fc.h> 40 #include <scsi/scsi_bsg_fc.h> 41 #include "scsi_priv.h" 42 43 static int fc_queue_work(struct Scsi_Host *, struct work_struct *); 44 static void fc_vport_sched_delete(struct work_struct *work); 45 static int fc_vport_setup(struct Scsi_Host *shost, int channel, 46 struct device *pdev, struct fc_vport_identifiers *ids, 47 struct fc_vport **vport); 48 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); 49 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); 50 static void fc_bsg_remove(struct request_queue *); 51 static void fc_bsg_goose_queue(struct fc_rport *); 52 53 /* 54 * Module Parameters 55 */ 56 57 /* 58 * dev_loss_tmo: the default number of seconds that the FC transport 59 * should insulate the loss of a remote port. 60 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 61 */ 62 static unsigned int fc_dev_loss_tmo = 60; /* seconds */ 63 64 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); 65 MODULE_PARM_DESC(dev_loss_tmo, 66 "Maximum number of seconds that the FC transport should" 67 " insulate the loss of a remote port. Once this value is" 68 " exceeded, the scsi target is removed. Value should be" 69 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" 70 " fast_io_fail_tmo is not set."); 71 72 /* 73 * Redefine so that we can have same named attributes in the 74 * sdev/starget/host objects. 75 */ 76 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 77 struct device_attribute device_attr_##_prefix##_##_name = \ 78 __ATTR(_name,_mode,_show,_store) 79 80 #define fc_enum_name_search(title, table_type, table) \ 81 static const char *get_fc_##title##_name(enum table_type table_key) \ 82 { \ 83 int i; \ 84 char *name = NULL; \ 85 \ 86 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 87 if (table[i].value == table_key) { \ 88 name = table[i].name; \ 89 break; \ 90 } \ 91 } \ 92 return name; \ 93 } 94 95 #define fc_enum_name_match(title, table_type, table) \ 96 static int get_fc_##title##_match(const char *table_key, \ 97 enum table_type *value) \ 98 { \ 99 int i; \ 100 \ 101 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 102 if (strncmp(table_key, table[i].name, \ 103 table[i].matchlen) == 0) { \ 104 *value = table[i].value; \ 105 return 0; /* success */ \ 106 } \ 107 } \ 108 return 1; /* failure */ \ 109 } 110 111 112 /* Convert fc_port_type values to ascii string name */ 113 static struct { 114 enum fc_port_type value; 115 char *name; 116 } fc_port_type_names[] = { 117 { FC_PORTTYPE_UNKNOWN, "Unknown" }, 118 { FC_PORTTYPE_OTHER, "Other" }, 119 { FC_PORTTYPE_NOTPRESENT, "Not Present" }, 120 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, 121 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, 122 { FC_PORTTYPE_LPORT, "LPort (private loop)" }, 123 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, 124 { FC_PORTTYPE_NPIV, "NPIV VPORT" }, 125 }; 126 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) 127 #define FC_PORTTYPE_MAX_NAMELEN 50 128 129 /* Reuse fc_port_type enum function for vport_type */ 130 #define get_fc_vport_type_name get_fc_port_type_name 131 132 133 /* Convert fc_host_event_code values to ascii string name */ 134 static const struct { 135 enum fc_host_event_code value; 136 char *name; 137 } fc_host_event_code_names[] = { 138 { FCH_EVT_LIP, "lip" }, 139 { FCH_EVT_LINKUP, "link_up" }, 140 { FCH_EVT_LINKDOWN, "link_down" }, 141 { FCH_EVT_LIPRESET, "lip_reset" }, 142 { FCH_EVT_RSCN, "rscn" }, 143 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, 144 { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, 145 { FCH_EVT_PORT_ONLINE, "port_online" }, 146 { FCH_EVT_PORT_OFFLINE, "port_offline" }, 147 { FCH_EVT_PORT_FABRIC, "port_fabric" }, 148 { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, 149 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 150 }; 151 fc_enum_name_search(host_event_code, fc_host_event_code, 152 fc_host_event_code_names) 153 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 154 155 156 /* Convert fc_port_state values to ascii string name */ 157 static struct { 158 enum fc_port_state value; 159 char *name; 160 } fc_port_state_names[] = { 161 { FC_PORTSTATE_UNKNOWN, "Unknown" }, 162 { FC_PORTSTATE_NOTPRESENT, "Not Present" }, 163 { FC_PORTSTATE_ONLINE, "Online" }, 164 { FC_PORTSTATE_OFFLINE, "Offline" }, 165 { FC_PORTSTATE_BLOCKED, "Blocked" }, 166 { FC_PORTSTATE_BYPASSED, "Bypassed" }, 167 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, 168 { FC_PORTSTATE_LINKDOWN, "Linkdown" }, 169 { FC_PORTSTATE_ERROR, "Error" }, 170 { FC_PORTSTATE_LOOPBACK, "Loopback" }, 171 { FC_PORTSTATE_DELETED, "Deleted" }, 172 }; 173 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 174 #define FC_PORTSTATE_MAX_NAMELEN 20 175 176 177 /* Convert fc_vport_state values to ascii string name */ 178 static struct { 179 enum fc_vport_state value; 180 char *name; 181 } fc_vport_state_names[] = { 182 { FC_VPORT_UNKNOWN, "Unknown" }, 183 { FC_VPORT_ACTIVE, "Active" }, 184 { FC_VPORT_DISABLED, "Disabled" }, 185 { FC_VPORT_LINKDOWN, "Linkdown" }, 186 { FC_VPORT_INITIALIZING, "Initializing" }, 187 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 188 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 189 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 190 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 191 { FC_VPORT_FAILED, "VPort Failed" }, 192 }; 193 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 194 #define FC_VPORTSTATE_MAX_NAMELEN 24 195 196 /* Reuse fc_vport_state enum function for vport_last_state */ 197 #define get_fc_vport_last_state_name get_fc_vport_state_name 198 199 200 /* Convert fc_tgtid_binding_type values to ascii string name */ 201 static const struct { 202 enum fc_tgtid_binding_type value; 203 char *name; 204 int matchlen; 205 } fc_tgtid_binding_type_names[] = { 206 { FC_TGTID_BIND_NONE, "none", 4 }, 207 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 208 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 209 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 210 }; 211 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 212 fc_tgtid_binding_type_names) 213 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 214 fc_tgtid_binding_type_names) 215 #define FC_BINDTYPE_MAX_NAMELEN 30 216 217 218 #define fc_bitfield_name_search(title, table) \ 219 static ssize_t \ 220 get_fc_##title##_names(u32 table_key, char *buf) \ 221 { \ 222 char *prefix = ""; \ 223 ssize_t len = 0; \ 224 int i; \ 225 \ 226 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 227 if (table[i].value & table_key) { \ 228 len += sprintf(buf + len, "%s%s", \ 229 prefix, table[i].name); \ 230 prefix = ", "; \ 231 } \ 232 } \ 233 len += sprintf(buf + len, "\n"); \ 234 return len; \ 235 } 236 237 238 /* Convert FC_COS bit values to ascii string name */ 239 static const struct { 240 u32 value; 241 char *name; 242 } fc_cos_names[] = { 243 { FC_COS_CLASS1, "Class 1" }, 244 { FC_COS_CLASS2, "Class 2" }, 245 { FC_COS_CLASS3, "Class 3" }, 246 { FC_COS_CLASS4, "Class 4" }, 247 { FC_COS_CLASS6, "Class 6" }, 248 }; 249 fc_bitfield_name_search(cos, fc_cos_names) 250 251 252 /* Convert FC_PORTSPEED bit values to ascii string name */ 253 static const struct { 254 u32 value; 255 char *name; 256 } fc_port_speed_names[] = { 257 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 258 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 259 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 260 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 261 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 262 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 263 { FC_PORTSPEED_32GBIT, "32 Gbit" }, 264 { FC_PORTSPEED_20GBIT, "20 Gbit" }, 265 { FC_PORTSPEED_40GBIT, "40 Gbit" }, 266 { FC_PORTSPEED_50GBIT, "50 Gbit" }, 267 { FC_PORTSPEED_100GBIT, "100 Gbit" }, 268 { FC_PORTSPEED_25GBIT, "25 Gbit" }, 269 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 270 }; 271 fc_bitfield_name_search(port_speed, fc_port_speed_names) 272 273 274 static int 275 show_fc_fc4s (char *buf, u8 *fc4_list) 276 { 277 int i, len=0; 278 279 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 280 len += sprintf(buf + len , "0x%02x ", *fc4_list); 281 len += sprintf(buf + len, "\n"); 282 return len; 283 } 284 285 286 /* Convert FC_PORT_ROLE bit values to ascii string name */ 287 static const struct { 288 u32 value; 289 char *name; 290 } fc_port_role_names[] = { 291 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 292 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 293 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 294 }; 295 fc_bitfield_name_search(port_roles, fc_port_role_names) 296 297 /* 298 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 299 */ 300 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 301 #define FC_WELLKNOWN_ROLE_MASK 0x00000f 302 #define FC_FPORT_PORTID 0x00000e 303 #define FC_FABCTLR_PORTID 0x00000d 304 #define FC_DIRSRVR_PORTID 0x00000c 305 #define FC_TIMESRVR_PORTID 0x00000b 306 #define FC_MGMTSRVR_PORTID 0x00000a 307 308 309 static void fc_timeout_deleted_rport(struct work_struct *work); 310 static void fc_timeout_fail_rport_io(struct work_struct *work); 311 static void fc_scsi_scan_rport(struct work_struct *work); 312 313 /* 314 * Attribute counts pre object type... 315 * Increase these values if you add attributes 316 */ 317 #define FC_STARGET_NUM_ATTRS 3 318 #define FC_RPORT_NUM_ATTRS 10 319 #define FC_VPORT_NUM_ATTRS 9 320 #define FC_HOST_NUM_ATTRS 29 321 322 struct fc_internal { 323 struct scsi_transport_template t; 324 struct fc_function_template *f; 325 326 /* 327 * For attributes : each object has : 328 * An array of the actual attributes structures 329 * An array of null-terminated pointers to the attribute 330 * structures - used for mid-layer interaction. 331 * 332 * The attribute containers for the starget and host are are 333 * part of the midlayer. As the remote port is specific to the 334 * fc transport, we must provide the attribute container. 335 */ 336 struct device_attribute private_starget_attrs[ 337 FC_STARGET_NUM_ATTRS]; 338 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 339 340 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 341 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 342 343 struct transport_container rport_attr_cont; 344 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 345 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 346 347 struct transport_container vport_attr_cont; 348 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 349 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 350 }; 351 352 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 353 354 static int fc_target_setup(struct transport_container *tc, struct device *dev, 355 struct device *cdev) 356 { 357 struct scsi_target *starget = to_scsi_target(dev); 358 struct fc_rport *rport = starget_to_rport(starget); 359 360 /* 361 * if parent is remote port, use values from remote port. 362 * Otherwise, this host uses the fc_transport, but not the 363 * remote port interface. As such, initialize to known non-values. 364 */ 365 if (rport) { 366 fc_starget_node_name(starget) = rport->node_name; 367 fc_starget_port_name(starget) = rport->port_name; 368 fc_starget_port_id(starget) = rport->port_id; 369 } else { 370 fc_starget_node_name(starget) = -1; 371 fc_starget_port_name(starget) = -1; 372 fc_starget_port_id(starget) = -1; 373 } 374 375 return 0; 376 } 377 378 static DECLARE_TRANSPORT_CLASS(fc_transport_class, 379 "fc_transport", 380 fc_target_setup, 381 NULL, 382 NULL); 383 384 static int fc_host_setup(struct transport_container *tc, struct device *dev, 385 struct device *cdev) 386 { 387 struct Scsi_Host *shost = dev_to_shost(dev); 388 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 389 390 /* 391 * Set default values easily detected by the midlayer as 392 * failure cases. The scsi lldd is responsible for initializing 393 * all transport attributes to valid values per host. 394 */ 395 fc_host->node_name = -1; 396 fc_host->port_name = -1; 397 fc_host->permanent_port_name = -1; 398 fc_host->supported_classes = FC_COS_UNSPECIFIED; 399 memset(fc_host->supported_fc4s, 0, 400 sizeof(fc_host->supported_fc4s)); 401 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 402 fc_host->maxframe_size = -1; 403 fc_host->max_npiv_vports = 0; 404 memset(fc_host->serial_number, 0, 405 sizeof(fc_host->serial_number)); 406 memset(fc_host->manufacturer, 0, 407 sizeof(fc_host->manufacturer)); 408 memset(fc_host->model, 0, 409 sizeof(fc_host->model)); 410 memset(fc_host->model_description, 0, 411 sizeof(fc_host->model_description)); 412 memset(fc_host->hardware_version, 0, 413 sizeof(fc_host->hardware_version)); 414 memset(fc_host->driver_version, 0, 415 sizeof(fc_host->driver_version)); 416 memset(fc_host->firmware_version, 0, 417 sizeof(fc_host->firmware_version)); 418 memset(fc_host->optionrom_version, 0, 419 sizeof(fc_host->optionrom_version)); 420 421 fc_host->port_id = -1; 422 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 423 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 424 memset(fc_host->active_fc4s, 0, 425 sizeof(fc_host->active_fc4s)); 426 fc_host->speed = FC_PORTSPEED_UNKNOWN; 427 fc_host->fabric_name = -1; 428 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 429 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 430 431 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 432 433 INIT_LIST_HEAD(&fc_host->rports); 434 INIT_LIST_HEAD(&fc_host->rport_bindings); 435 INIT_LIST_HEAD(&fc_host->vports); 436 fc_host->next_rport_number = 0; 437 fc_host->next_target_id = 0; 438 fc_host->next_vport_number = 0; 439 fc_host->npiv_vports_inuse = 0; 440 441 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 442 "fc_wq_%d", shost->host_no); 443 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); 444 if (!fc_host->work_q) 445 return -ENOMEM; 446 447 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 448 snprintf(fc_host->devloss_work_q_name, 449 sizeof(fc_host->devloss_work_q_name), 450 "fc_dl_%d", shost->host_no); 451 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, 452 fc_host->devloss_work_q_name); 453 if (!fc_host->devloss_work_q) { 454 destroy_workqueue(fc_host->work_q); 455 fc_host->work_q = NULL; 456 return -ENOMEM; 457 } 458 459 fc_bsg_hostadd(shost, fc_host); 460 /* ignore any bsg add error - we just can't do sgio */ 461 462 return 0; 463 } 464 465 static int fc_host_remove(struct transport_container *tc, struct device *dev, 466 struct device *cdev) 467 { 468 struct Scsi_Host *shost = dev_to_shost(dev); 469 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 470 471 fc_bsg_remove(fc_host->rqst_q); 472 return 0; 473 } 474 475 static DECLARE_TRANSPORT_CLASS(fc_host_class, 476 "fc_host", 477 fc_host_setup, 478 fc_host_remove, 479 NULL); 480 481 /* 482 * Setup and Remove actions for remote ports are handled 483 * in the service functions below. 484 */ 485 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 486 "fc_remote_ports", 487 NULL, 488 NULL, 489 NULL); 490 491 /* 492 * Setup and Remove actions for virtual ports are handled 493 * in the service functions below. 494 */ 495 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 496 "fc_vports", 497 NULL, 498 NULL, 499 NULL); 500 501 /* 502 * Netlink Infrastructure 503 */ 504 505 static atomic_t fc_event_seq; 506 507 /** 508 * fc_get_event_number - Obtain the next sequential FC event number 509 * 510 * Notes: 511 * We could have inlined this, but it would have required fc_event_seq to 512 * be exposed. For now, live with the subroutine call. 513 * Atomic used to avoid lock/unlock... 514 */ 515 u32 516 fc_get_event_number(void) 517 { 518 return atomic_add_return(1, &fc_event_seq); 519 } 520 EXPORT_SYMBOL(fc_get_event_number); 521 522 523 /** 524 * fc_host_post_event - called to post an even on an fc_host. 525 * @shost: host the event occurred on 526 * @event_number: fc event number obtained from get_fc_event_number() 527 * @event_code: fc_host event being posted 528 * @event_data: 32bits of data for the event being posted 529 * 530 * Notes: 531 * This routine assumes no locks are held on entry. 532 */ 533 void 534 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 535 enum fc_host_event_code event_code, u32 event_data) 536 { 537 struct sk_buff *skb; 538 struct nlmsghdr *nlh; 539 struct fc_nl_event *event; 540 const char *name; 541 u32 len; 542 int err; 543 544 if (!scsi_nl_sock) { 545 err = -ENOENT; 546 goto send_fail; 547 } 548 549 len = FC_NL_MSGALIGN(sizeof(*event)); 550 551 skb = nlmsg_new(len, GFP_KERNEL); 552 if (!skb) { 553 err = -ENOBUFS; 554 goto send_fail; 555 } 556 557 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 558 if (!nlh) { 559 err = -ENOBUFS; 560 goto send_fail_skb; 561 } 562 event = nlmsg_data(nlh); 563 564 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 565 FC_NL_ASYNC_EVENT, len); 566 event->seconds = get_seconds(); 567 event->vendor_id = 0; 568 event->host_no = shost->host_no; 569 event->event_datalen = sizeof(u32); /* bytes */ 570 event->event_num = event_number; 571 event->event_code = event_code; 572 event->event_data = event_data; 573 574 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 575 GFP_KERNEL); 576 return; 577 578 send_fail_skb: 579 kfree_skb(skb); 580 send_fail: 581 name = get_fc_host_event_code_name(event_code); 582 printk(KERN_WARNING 583 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 584 __func__, shost->host_no, 585 (name) ? name : "<unknown>", event_data, err); 586 return; 587 } 588 EXPORT_SYMBOL(fc_host_post_event); 589 590 591 /** 592 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host 593 * @shost: host the event occurred on 594 * @event_number: fc event number obtained from get_fc_event_number() 595 * @data_len: amount, in bytes, of vendor unique data 596 * @data_buf: pointer to vendor unique data 597 * @vendor_id: Vendor id 598 * 599 * Notes: 600 * This routine assumes no locks are held on entry. 601 */ 602 void 603 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 604 u32 data_len, char * data_buf, u64 vendor_id) 605 { 606 struct sk_buff *skb; 607 struct nlmsghdr *nlh; 608 struct fc_nl_event *event; 609 u32 len; 610 int err; 611 612 if (!scsi_nl_sock) { 613 err = -ENOENT; 614 goto send_vendor_fail; 615 } 616 617 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 618 619 skb = nlmsg_new(len, GFP_KERNEL); 620 if (!skb) { 621 err = -ENOBUFS; 622 goto send_vendor_fail; 623 } 624 625 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 626 if (!nlh) { 627 err = -ENOBUFS; 628 goto send_vendor_fail_skb; 629 } 630 event = nlmsg_data(nlh); 631 632 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 633 FC_NL_ASYNC_EVENT, len); 634 event->seconds = get_seconds(); 635 event->vendor_id = vendor_id; 636 event->host_no = shost->host_no; 637 event->event_datalen = data_len; /* bytes */ 638 event->event_num = event_number; 639 event->event_code = FCH_EVT_VENDOR_UNIQUE; 640 memcpy(&event->event_data, data_buf, data_len); 641 642 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 643 GFP_KERNEL); 644 return; 645 646 send_vendor_fail_skb: 647 kfree_skb(skb); 648 send_vendor_fail: 649 printk(KERN_WARNING 650 "%s: Dropped Event : host %d vendor_unique - err %d\n", 651 __func__, shost->host_no, err); 652 return; 653 } 654 EXPORT_SYMBOL(fc_host_post_vendor_event); 655 656 657 658 static __init int fc_transport_init(void) 659 { 660 int error; 661 662 atomic_set(&fc_event_seq, 0); 663 664 error = transport_class_register(&fc_host_class); 665 if (error) 666 return error; 667 error = transport_class_register(&fc_vport_class); 668 if (error) 669 goto unreg_host_class; 670 error = transport_class_register(&fc_rport_class); 671 if (error) 672 goto unreg_vport_class; 673 error = transport_class_register(&fc_transport_class); 674 if (error) 675 goto unreg_rport_class; 676 return 0; 677 678 unreg_rport_class: 679 transport_class_unregister(&fc_rport_class); 680 unreg_vport_class: 681 transport_class_unregister(&fc_vport_class); 682 unreg_host_class: 683 transport_class_unregister(&fc_host_class); 684 return error; 685 } 686 687 static void __exit fc_transport_exit(void) 688 { 689 transport_class_unregister(&fc_transport_class); 690 transport_class_unregister(&fc_rport_class); 691 transport_class_unregister(&fc_host_class); 692 transport_class_unregister(&fc_vport_class); 693 } 694 695 /* 696 * FC Remote Port Attribute Management 697 */ 698 699 #define fc_rport_show_function(field, format_string, sz, cast) \ 700 static ssize_t \ 701 show_fc_rport_##field (struct device *dev, \ 702 struct device_attribute *attr, char *buf) \ 703 { \ 704 struct fc_rport *rport = transport_class_to_rport(dev); \ 705 struct Scsi_Host *shost = rport_to_shost(rport); \ 706 struct fc_internal *i = to_fc_internal(shost->transportt); \ 707 if ((i->f->get_rport_##field) && \ 708 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 709 (rport->port_state == FC_PORTSTATE_DELETED) || \ 710 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 711 i->f->get_rport_##field(rport); \ 712 return snprintf(buf, sz, format_string, cast rport->field); \ 713 } 714 715 #define fc_rport_store_function(field) \ 716 static ssize_t \ 717 store_fc_rport_##field(struct device *dev, \ 718 struct device_attribute *attr, \ 719 const char *buf, size_t count) \ 720 { \ 721 int val; \ 722 struct fc_rport *rport = transport_class_to_rport(dev); \ 723 struct Scsi_Host *shost = rport_to_shost(rport); \ 724 struct fc_internal *i = to_fc_internal(shost->transportt); \ 725 char *cp; \ 726 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 727 (rport->port_state == FC_PORTSTATE_DELETED) || \ 728 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 729 return -EBUSY; \ 730 val = simple_strtoul(buf, &cp, 0); \ 731 if (*cp && (*cp != '\n')) \ 732 return -EINVAL; \ 733 i->f->set_rport_##field(rport, val); \ 734 return count; \ 735 } 736 737 #define fc_rport_rd_attr(field, format_string, sz) \ 738 fc_rport_show_function(field, format_string, sz, ) \ 739 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 740 show_fc_rport_##field, NULL) 741 742 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 743 fc_rport_show_function(field, format_string, sz, (cast)) \ 744 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 745 show_fc_rport_##field, NULL) 746 747 #define fc_rport_rw_attr(field, format_string, sz) \ 748 fc_rport_show_function(field, format_string, sz, ) \ 749 fc_rport_store_function(field) \ 750 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 751 show_fc_rport_##field, \ 752 store_fc_rport_##field) 753 754 755 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 756 static ssize_t \ 757 show_fc_rport_##field (struct device *dev, \ 758 struct device_attribute *attr, char *buf) \ 759 { \ 760 struct fc_rport *rport = transport_class_to_rport(dev); \ 761 return snprintf(buf, sz, format_string, cast rport->field); \ 762 } 763 764 #define fc_private_rport_rd_attr(field, format_string, sz) \ 765 fc_private_rport_show_function(field, format_string, sz, ) \ 766 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 767 show_fc_rport_##field, NULL) 768 769 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 770 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 771 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 772 show_fc_rport_##field, NULL) 773 774 775 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 776 static ssize_t \ 777 show_fc_rport_##title (struct device *dev, \ 778 struct device_attribute *attr, char *buf) \ 779 { \ 780 struct fc_rport *rport = transport_class_to_rport(dev); \ 781 const char *name; \ 782 name = get_fc_##title##_name(rport->title); \ 783 if (!name) \ 784 return -EINVAL; \ 785 return snprintf(buf, maxlen, "%s\n", name); \ 786 } \ 787 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 788 show_fc_rport_##title, NULL) 789 790 791 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 792 i->private_rport_attrs[count] = device_attr_rport_##field; \ 793 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 794 i->private_rport_attrs[count].store = NULL; \ 795 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 796 if (i->f->show_rport_##field) \ 797 count++ 798 799 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 800 i->private_rport_attrs[count] = device_attr_rport_##field; \ 801 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 802 i->private_rport_attrs[count].store = NULL; \ 803 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 804 count++ 805 806 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 807 i->private_rport_attrs[count] = device_attr_rport_##field; \ 808 if (!i->f->set_rport_##field) { \ 809 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 810 i->private_rport_attrs[count].store = NULL; \ 811 } \ 812 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 813 if (i->f->show_rport_##field) \ 814 count++ 815 816 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 817 { \ 818 i->private_rport_attrs[count] = device_attr_rport_##field; \ 819 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 820 count++; \ 821 } 822 823 824 /* The FC Transport Remote Port Attributes: */ 825 826 /* Fixed Remote Port Attributes */ 827 828 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 829 830 static ssize_t 831 show_fc_rport_supported_classes (struct device *dev, 832 struct device_attribute *attr, char *buf) 833 { 834 struct fc_rport *rport = transport_class_to_rport(dev); 835 if (rport->supported_classes == FC_COS_UNSPECIFIED) 836 return snprintf(buf, 20, "unspecified\n"); 837 return get_fc_cos_names(rport->supported_classes, buf); 838 } 839 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 840 show_fc_rport_supported_classes, NULL); 841 842 /* Dynamic Remote Port Attributes */ 843 844 /* 845 * dev_loss_tmo attribute 846 */ 847 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 848 { 849 char *cp; 850 851 *val = simple_strtoul(buf, &cp, 0); 852 if ((*cp && (*cp != '\n')) || (*val < 0)) 853 return -EINVAL; 854 /* 855 * Check for overflow; dev_loss_tmo is u32 856 */ 857 if (*val > UINT_MAX) 858 return -EINVAL; 859 860 return 0; 861 } 862 863 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 864 unsigned long val) 865 { 866 struct Scsi_Host *shost = rport_to_shost(rport); 867 struct fc_internal *i = to_fc_internal(shost->transportt); 868 869 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 870 (rport->port_state == FC_PORTSTATE_DELETED) || 871 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 872 return -EBUSY; 873 /* 874 * Check for overflow; dev_loss_tmo is u32 875 */ 876 if (val > UINT_MAX) 877 return -EINVAL; 878 879 /* 880 * If fast_io_fail is off we have to cap 881 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 882 */ 883 if (rport->fast_io_fail_tmo == -1 && 884 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 885 return -EINVAL; 886 887 i->f->set_rport_dev_loss_tmo(rport, val); 888 return 0; 889 } 890 891 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 892 static ssize_t 893 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 894 const char *buf, size_t count) 895 { 896 struct fc_rport *rport = transport_class_to_rport(dev); 897 unsigned long val; 898 int rc; 899 900 rc = fc_str_to_dev_loss(buf, &val); 901 if (rc) 902 return rc; 903 904 rc = fc_rport_set_dev_loss_tmo(rport, val); 905 if (rc) 906 return rc; 907 return count; 908 } 909 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 910 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 911 912 913 /* Private Remote Port Attributes */ 914 915 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 916 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 917 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 918 919 static ssize_t 920 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 921 char *buf) 922 { 923 struct fc_rport *rport = transport_class_to_rport(dev); 924 925 /* identify any roles that are port_id specific */ 926 if ((rport->port_id != -1) && 927 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 928 FC_WELLKNOWN_PORTID_MASK) { 929 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 930 case FC_FPORT_PORTID: 931 return snprintf(buf, 30, "Fabric Port\n"); 932 case FC_FABCTLR_PORTID: 933 return snprintf(buf, 30, "Fabric Controller\n"); 934 case FC_DIRSRVR_PORTID: 935 return snprintf(buf, 30, "Directory Server\n"); 936 case FC_TIMESRVR_PORTID: 937 return snprintf(buf, 30, "Time Server\n"); 938 case FC_MGMTSRVR_PORTID: 939 return snprintf(buf, 30, "Management Server\n"); 940 default: 941 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 942 } 943 } else { 944 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 945 return snprintf(buf, 20, "unknown\n"); 946 return get_fc_port_roles_names(rport->roles, buf); 947 } 948 } 949 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 950 show_fc_rport_roles, NULL); 951 952 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 953 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 954 955 /* 956 * fast_io_fail_tmo attribute 957 */ 958 static ssize_t 959 show_fc_rport_fast_io_fail_tmo (struct device *dev, 960 struct device_attribute *attr, char *buf) 961 { 962 struct fc_rport *rport = transport_class_to_rport(dev); 963 964 if (rport->fast_io_fail_tmo == -1) 965 return snprintf(buf, 5, "off\n"); 966 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 967 } 968 969 static ssize_t 970 store_fc_rport_fast_io_fail_tmo(struct device *dev, 971 struct device_attribute *attr, const char *buf, 972 size_t count) 973 { 974 int val; 975 char *cp; 976 struct fc_rport *rport = transport_class_to_rport(dev); 977 978 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 979 (rport->port_state == FC_PORTSTATE_DELETED) || 980 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 981 return -EBUSY; 982 if (strncmp(buf, "off", 3) == 0) 983 rport->fast_io_fail_tmo = -1; 984 else { 985 val = simple_strtoul(buf, &cp, 0); 986 if ((*cp && (*cp != '\n')) || (val < 0)) 987 return -EINVAL; 988 /* 989 * Cap fast_io_fail by dev_loss_tmo or 990 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 991 */ 992 if ((val >= rport->dev_loss_tmo) || 993 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 994 return -EINVAL; 995 996 rport->fast_io_fail_tmo = val; 997 } 998 return count; 999 } 1000 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 1001 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 1002 1003 1004 /* 1005 * FC SCSI Target Attribute Management 1006 */ 1007 1008 /* 1009 * Note: in the target show function we recognize when the remote 1010 * port is in the hierarchy and do not allow the driver to get 1011 * involved in sysfs functions. The driver only gets involved if 1012 * it's the "old" style that doesn't use rports. 1013 */ 1014 #define fc_starget_show_function(field, format_string, sz, cast) \ 1015 static ssize_t \ 1016 show_fc_starget_##field (struct device *dev, \ 1017 struct device_attribute *attr, char *buf) \ 1018 { \ 1019 struct scsi_target *starget = transport_class_to_starget(dev); \ 1020 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1021 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1022 struct fc_rport *rport = starget_to_rport(starget); \ 1023 if (rport) \ 1024 fc_starget_##field(starget) = rport->field; \ 1025 else if (i->f->get_starget_##field) \ 1026 i->f->get_starget_##field(starget); \ 1027 return snprintf(buf, sz, format_string, \ 1028 cast fc_starget_##field(starget)); \ 1029 } 1030 1031 #define fc_starget_rd_attr(field, format_string, sz) \ 1032 fc_starget_show_function(field, format_string, sz, ) \ 1033 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1034 show_fc_starget_##field, NULL) 1035 1036 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1037 fc_starget_show_function(field, format_string, sz, (cast)) \ 1038 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1039 show_fc_starget_##field, NULL) 1040 1041 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1042 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1043 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1044 i->private_starget_attrs[count].store = NULL; \ 1045 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1046 if (i->f->show_starget_##field) \ 1047 count++ 1048 1049 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1050 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1051 if (!i->f->set_starget_##field) { \ 1052 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1053 i->private_starget_attrs[count].store = NULL; \ 1054 } \ 1055 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1056 if (i->f->show_starget_##field) \ 1057 count++ 1058 1059 /* The FC Transport SCSI Target Attributes: */ 1060 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1061 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1062 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1063 1064 1065 /* 1066 * FC Virtual Port Attribute Management 1067 */ 1068 1069 #define fc_vport_show_function(field, format_string, sz, cast) \ 1070 static ssize_t \ 1071 show_fc_vport_##field (struct device *dev, \ 1072 struct device_attribute *attr, char *buf) \ 1073 { \ 1074 struct fc_vport *vport = transport_class_to_vport(dev); \ 1075 struct Scsi_Host *shost = vport_to_shost(vport); \ 1076 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1077 if ((i->f->get_vport_##field) && \ 1078 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1079 i->f->get_vport_##field(vport); \ 1080 return snprintf(buf, sz, format_string, cast vport->field); \ 1081 } 1082 1083 #define fc_vport_store_function(field) \ 1084 static ssize_t \ 1085 store_fc_vport_##field(struct device *dev, \ 1086 struct device_attribute *attr, \ 1087 const char *buf, size_t count) \ 1088 { \ 1089 int val; \ 1090 struct fc_vport *vport = transport_class_to_vport(dev); \ 1091 struct Scsi_Host *shost = vport_to_shost(vport); \ 1092 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1093 char *cp; \ 1094 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1095 return -EBUSY; \ 1096 val = simple_strtoul(buf, &cp, 0); \ 1097 if (*cp && (*cp != '\n')) \ 1098 return -EINVAL; \ 1099 i->f->set_vport_##field(vport, val); \ 1100 return count; \ 1101 } 1102 1103 #define fc_vport_store_str_function(field, slen) \ 1104 static ssize_t \ 1105 store_fc_vport_##field(struct device *dev, \ 1106 struct device_attribute *attr, \ 1107 const char *buf, size_t count) \ 1108 { \ 1109 struct fc_vport *vport = transport_class_to_vport(dev); \ 1110 struct Scsi_Host *shost = vport_to_shost(vport); \ 1111 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1112 unsigned int cnt=count; \ 1113 \ 1114 /* count may include a LF at end of string */ \ 1115 if (buf[cnt-1] == '\n') \ 1116 cnt--; \ 1117 if (cnt > ((slen) - 1)) \ 1118 return -EINVAL; \ 1119 memcpy(vport->field, buf, cnt); \ 1120 i->f->set_vport_##field(vport); \ 1121 return count; \ 1122 } 1123 1124 #define fc_vport_rd_attr(field, format_string, sz) \ 1125 fc_vport_show_function(field, format_string, sz, ) \ 1126 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1127 show_fc_vport_##field, NULL) 1128 1129 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1130 fc_vport_show_function(field, format_string, sz, (cast)) \ 1131 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1132 show_fc_vport_##field, NULL) 1133 1134 #define fc_vport_rw_attr(field, format_string, sz) \ 1135 fc_vport_show_function(field, format_string, sz, ) \ 1136 fc_vport_store_function(field) \ 1137 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1138 show_fc_vport_##field, \ 1139 store_fc_vport_##field) 1140 1141 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1142 static ssize_t \ 1143 show_fc_vport_##field (struct device *dev, \ 1144 struct device_attribute *attr, char *buf) \ 1145 { \ 1146 struct fc_vport *vport = transport_class_to_vport(dev); \ 1147 return snprintf(buf, sz, format_string, cast vport->field); \ 1148 } 1149 1150 #define fc_private_vport_store_u32_function(field) \ 1151 static ssize_t \ 1152 store_fc_vport_##field(struct device *dev, \ 1153 struct device_attribute *attr, \ 1154 const char *buf, size_t count) \ 1155 { \ 1156 u32 val; \ 1157 struct fc_vport *vport = transport_class_to_vport(dev); \ 1158 char *cp; \ 1159 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1160 return -EBUSY; \ 1161 val = simple_strtoul(buf, &cp, 0); \ 1162 if (*cp && (*cp != '\n')) \ 1163 return -EINVAL; \ 1164 vport->field = val; \ 1165 return count; \ 1166 } 1167 1168 1169 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1170 fc_private_vport_show_function(field, format_string, sz, ) \ 1171 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1172 show_fc_vport_##field, NULL) 1173 1174 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1175 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1176 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1177 show_fc_vport_##field, NULL) 1178 1179 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1180 fc_private_vport_show_function(field, format_string, sz, ) \ 1181 fc_private_vport_store_u32_function(field) \ 1182 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1183 show_fc_vport_##field, \ 1184 store_fc_vport_##field) 1185 1186 1187 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1188 static ssize_t \ 1189 show_fc_vport_##title (struct device *dev, \ 1190 struct device_attribute *attr, \ 1191 char *buf) \ 1192 { \ 1193 struct fc_vport *vport = transport_class_to_vport(dev); \ 1194 const char *name; \ 1195 name = get_fc_##title##_name(vport->title); \ 1196 if (!name) \ 1197 return -EINVAL; \ 1198 return snprintf(buf, maxlen, "%s\n", name); \ 1199 } \ 1200 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1201 show_fc_vport_##title, NULL) 1202 1203 1204 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1205 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1206 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1207 i->private_vport_attrs[count].store = NULL; \ 1208 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1209 if (i->f->get_##field) \ 1210 count++ 1211 /* NOTE: Above MACRO differs: checks function not show bit */ 1212 1213 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1214 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1215 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1216 i->private_vport_attrs[count].store = NULL; \ 1217 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1218 count++ 1219 1220 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1221 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1222 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1223 if (i->f->field) \ 1224 count++ 1225 /* NOTE: Above MACRO differs: checks function */ 1226 1227 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1228 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1229 if (!i->f->set_vport_##field) { \ 1230 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1231 i->private_vport_attrs[count].store = NULL; \ 1232 } \ 1233 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1234 count++ 1235 /* NOTE: Above MACRO differs: does not check show bit */ 1236 1237 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1238 { \ 1239 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1240 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1241 count++; \ 1242 } 1243 1244 1245 /* The FC Transport Virtual Port Attributes: */ 1246 1247 /* Fixed Virtual Port Attributes */ 1248 1249 /* Dynamic Virtual Port Attributes */ 1250 1251 /* Private Virtual Port Attributes */ 1252 1253 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1254 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1255 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1256 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1257 1258 static ssize_t 1259 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1260 char *buf) 1261 { 1262 struct fc_vport *vport = transport_class_to_vport(dev); 1263 1264 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1265 return snprintf(buf, 20, "unknown\n"); 1266 return get_fc_port_roles_names(vport->roles, buf); 1267 } 1268 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1269 1270 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1271 1272 fc_private_vport_show_function(symbolic_name, "%s\n", 1273 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1274 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1275 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1276 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1277 1278 static ssize_t 1279 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1280 const char *buf, size_t count) 1281 { 1282 struct fc_vport *vport = transport_class_to_vport(dev); 1283 struct Scsi_Host *shost = vport_to_shost(vport); 1284 unsigned long flags; 1285 1286 spin_lock_irqsave(shost->host_lock, flags); 1287 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1288 spin_unlock_irqrestore(shost->host_lock, flags); 1289 return -EBUSY; 1290 } 1291 vport->flags |= FC_VPORT_DELETING; 1292 spin_unlock_irqrestore(shost->host_lock, flags); 1293 1294 fc_queue_work(shost, &vport->vport_delete_work); 1295 return count; 1296 } 1297 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1298 NULL, store_fc_vport_delete); 1299 1300 1301 /* 1302 * Enable/Disable vport 1303 * Write "1" to disable, write "0" to enable 1304 */ 1305 static ssize_t 1306 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1307 const char *buf, 1308 size_t count) 1309 { 1310 struct fc_vport *vport = transport_class_to_vport(dev); 1311 struct Scsi_Host *shost = vport_to_shost(vport); 1312 struct fc_internal *i = to_fc_internal(shost->transportt); 1313 int stat; 1314 1315 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1316 return -EBUSY; 1317 1318 if (*buf == '0') { 1319 if (vport->vport_state != FC_VPORT_DISABLED) 1320 return -EALREADY; 1321 } else if (*buf == '1') { 1322 if (vport->vport_state == FC_VPORT_DISABLED) 1323 return -EALREADY; 1324 } else 1325 return -EINVAL; 1326 1327 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1328 return stat ? stat : count; 1329 } 1330 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1331 NULL, store_fc_vport_disable); 1332 1333 1334 /* 1335 * Host Attribute Management 1336 */ 1337 1338 #define fc_host_show_function(field, format_string, sz, cast) \ 1339 static ssize_t \ 1340 show_fc_host_##field (struct device *dev, \ 1341 struct device_attribute *attr, char *buf) \ 1342 { \ 1343 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1344 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1345 if (i->f->get_host_##field) \ 1346 i->f->get_host_##field(shost); \ 1347 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1348 } 1349 1350 #define fc_host_store_function(field) \ 1351 static ssize_t \ 1352 store_fc_host_##field(struct device *dev, \ 1353 struct device_attribute *attr, \ 1354 const char *buf, size_t count) \ 1355 { \ 1356 int val; \ 1357 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1358 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1359 char *cp; \ 1360 \ 1361 val = simple_strtoul(buf, &cp, 0); \ 1362 if (*cp && (*cp != '\n')) \ 1363 return -EINVAL; \ 1364 i->f->set_host_##field(shost, val); \ 1365 return count; \ 1366 } 1367 1368 #define fc_host_store_str_function(field, slen) \ 1369 static ssize_t \ 1370 store_fc_host_##field(struct device *dev, \ 1371 struct device_attribute *attr, \ 1372 const char *buf, size_t count) \ 1373 { \ 1374 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1375 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1376 unsigned int cnt=count; \ 1377 \ 1378 /* count may include a LF at end of string */ \ 1379 if (buf[cnt-1] == '\n') \ 1380 cnt--; \ 1381 if (cnt > ((slen) - 1)) \ 1382 return -EINVAL; \ 1383 memcpy(fc_host_##field(shost), buf, cnt); \ 1384 i->f->set_host_##field(shost); \ 1385 return count; \ 1386 } 1387 1388 #define fc_host_rd_attr(field, format_string, sz) \ 1389 fc_host_show_function(field, format_string, sz, ) \ 1390 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1391 show_fc_host_##field, NULL) 1392 1393 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1394 fc_host_show_function(field, format_string, sz, (cast)) \ 1395 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1396 show_fc_host_##field, NULL) 1397 1398 #define fc_host_rw_attr(field, format_string, sz) \ 1399 fc_host_show_function(field, format_string, sz, ) \ 1400 fc_host_store_function(field) \ 1401 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1402 show_fc_host_##field, \ 1403 store_fc_host_##field) 1404 1405 #define fc_host_rd_enum_attr(title, maxlen) \ 1406 static ssize_t \ 1407 show_fc_host_##title (struct device *dev, \ 1408 struct device_attribute *attr, char *buf) \ 1409 { \ 1410 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1411 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1412 const char *name; \ 1413 if (i->f->get_host_##title) \ 1414 i->f->get_host_##title(shost); \ 1415 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1416 if (!name) \ 1417 return -EINVAL; \ 1418 return snprintf(buf, maxlen, "%s\n", name); \ 1419 } \ 1420 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1421 1422 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1423 i->private_host_attrs[count] = device_attr_host_##field; \ 1424 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1425 i->private_host_attrs[count].store = NULL; \ 1426 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1427 if (i->f->show_host_##field) \ 1428 count++ 1429 1430 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1431 i->private_host_attrs[count] = device_attr_host_##field; \ 1432 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1433 i->private_host_attrs[count].store = NULL; \ 1434 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1435 count++ 1436 1437 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1438 i->private_host_attrs[count] = device_attr_host_##field; \ 1439 if (!i->f->set_host_##field) { \ 1440 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1441 i->private_host_attrs[count].store = NULL; \ 1442 } \ 1443 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1444 if (i->f->show_host_##field) \ 1445 count++ 1446 1447 1448 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1449 static ssize_t \ 1450 show_fc_host_##field (struct device *dev, \ 1451 struct device_attribute *attr, char *buf) \ 1452 { \ 1453 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1454 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1455 } 1456 1457 #define fc_private_host_rd_attr(field, format_string, sz) \ 1458 fc_private_host_show_function(field, format_string, sz, ) \ 1459 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1460 show_fc_host_##field, NULL) 1461 1462 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1463 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1464 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1465 show_fc_host_##field, NULL) 1466 1467 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1468 i->private_host_attrs[count] = device_attr_host_##field; \ 1469 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1470 i->private_host_attrs[count].store = NULL; \ 1471 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1472 count++ 1473 1474 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1475 { \ 1476 i->private_host_attrs[count] = device_attr_host_##field; \ 1477 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1478 count++; \ 1479 } 1480 1481 1482 /* Fixed Host Attributes */ 1483 1484 static ssize_t 1485 show_fc_host_supported_classes (struct device *dev, 1486 struct device_attribute *attr, char *buf) 1487 { 1488 struct Scsi_Host *shost = transport_class_to_shost(dev); 1489 1490 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1491 return snprintf(buf, 20, "unspecified\n"); 1492 1493 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1494 } 1495 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1496 show_fc_host_supported_classes, NULL); 1497 1498 static ssize_t 1499 show_fc_host_supported_fc4s (struct device *dev, 1500 struct device_attribute *attr, char *buf) 1501 { 1502 struct Scsi_Host *shost = transport_class_to_shost(dev); 1503 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1504 } 1505 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1506 show_fc_host_supported_fc4s, NULL); 1507 1508 static ssize_t 1509 show_fc_host_supported_speeds (struct device *dev, 1510 struct device_attribute *attr, char *buf) 1511 { 1512 struct Scsi_Host *shost = transport_class_to_shost(dev); 1513 1514 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1515 return snprintf(buf, 20, "unknown\n"); 1516 1517 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1518 } 1519 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1520 show_fc_host_supported_speeds, NULL); 1521 1522 1523 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1524 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1525 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1526 unsigned long long); 1527 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1528 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1529 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1530 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1531 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1532 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1533 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1534 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1535 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1536 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1537 1538 1539 /* Dynamic Host Attributes */ 1540 1541 static ssize_t 1542 show_fc_host_active_fc4s (struct device *dev, 1543 struct device_attribute *attr, char *buf) 1544 { 1545 struct Scsi_Host *shost = transport_class_to_shost(dev); 1546 struct fc_internal *i = to_fc_internal(shost->transportt); 1547 1548 if (i->f->get_host_active_fc4s) 1549 i->f->get_host_active_fc4s(shost); 1550 1551 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1552 } 1553 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1554 show_fc_host_active_fc4s, NULL); 1555 1556 static ssize_t 1557 show_fc_host_speed (struct device *dev, 1558 struct device_attribute *attr, char *buf) 1559 { 1560 struct Scsi_Host *shost = transport_class_to_shost(dev); 1561 struct fc_internal *i = to_fc_internal(shost->transportt); 1562 1563 if (i->f->get_host_speed) 1564 i->f->get_host_speed(shost); 1565 1566 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1567 return snprintf(buf, 20, "unknown\n"); 1568 1569 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1570 } 1571 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1572 show_fc_host_speed, NULL); 1573 1574 1575 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1576 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1577 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1578 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1579 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1580 1581 fc_private_host_show_function(system_hostname, "%s\n", 1582 FC_SYMBOLIC_NAME_SIZE + 1, ) 1583 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1584 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1585 show_fc_host_system_hostname, store_fc_host_system_hostname); 1586 1587 1588 /* Private Host Attributes */ 1589 1590 static ssize_t 1591 show_fc_private_host_tgtid_bind_type(struct device *dev, 1592 struct device_attribute *attr, char *buf) 1593 { 1594 struct Scsi_Host *shost = transport_class_to_shost(dev); 1595 const char *name; 1596 1597 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1598 if (!name) 1599 return -EINVAL; 1600 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1601 } 1602 1603 #define get_list_head_entry(pos, head, member) \ 1604 pos = list_entry((head)->next, typeof(*pos), member) 1605 1606 static ssize_t 1607 store_fc_private_host_tgtid_bind_type(struct device *dev, 1608 struct device_attribute *attr, const char *buf, size_t count) 1609 { 1610 struct Scsi_Host *shost = transport_class_to_shost(dev); 1611 struct fc_rport *rport; 1612 enum fc_tgtid_binding_type val; 1613 unsigned long flags; 1614 1615 if (get_fc_tgtid_bind_type_match(buf, &val)) 1616 return -EINVAL; 1617 1618 /* if changing bind type, purge all unused consistent bindings */ 1619 if (val != fc_host_tgtid_bind_type(shost)) { 1620 spin_lock_irqsave(shost->host_lock, flags); 1621 while (!list_empty(&fc_host_rport_bindings(shost))) { 1622 get_list_head_entry(rport, 1623 &fc_host_rport_bindings(shost), peers); 1624 list_del(&rport->peers); 1625 rport->port_state = FC_PORTSTATE_DELETED; 1626 fc_queue_work(shost, &rport->rport_delete_work); 1627 } 1628 spin_unlock_irqrestore(shost->host_lock, flags); 1629 } 1630 1631 fc_host_tgtid_bind_type(shost) = val; 1632 return count; 1633 } 1634 1635 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1636 show_fc_private_host_tgtid_bind_type, 1637 store_fc_private_host_tgtid_bind_type); 1638 1639 static ssize_t 1640 store_fc_private_host_issue_lip(struct device *dev, 1641 struct device_attribute *attr, const char *buf, size_t count) 1642 { 1643 struct Scsi_Host *shost = transport_class_to_shost(dev); 1644 struct fc_internal *i = to_fc_internal(shost->transportt); 1645 int ret; 1646 1647 /* ignore any data value written to the attribute */ 1648 if (i->f->issue_fc_host_lip) { 1649 ret = i->f->issue_fc_host_lip(shost); 1650 return ret ? ret: count; 1651 } 1652 1653 return -ENOENT; 1654 } 1655 1656 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1657 store_fc_private_host_issue_lip); 1658 1659 static ssize_t 1660 store_fc_private_host_dev_loss_tmo(struct device *dev, 1661 struct device_attribute *attr, 1662 const char *buf, size_t count) 1663 { 1664 struct Scsi_Host *shost = transport_class_to_shost(dev); 1665 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1666 struct fc_rport *rport; 1667 unsigned long val, flags; 1668 int rc; 1669 1670 rc = fc_str_to_dev_loss(buf, &val); 1671 if (rc) 1672 return rc; 1673 1674 fc_host_dev_loss_tmo(shost) = val; 1675 spin_lock_irqsave(shost->host_lock, flags); 1676 list_for_each_entry(rport, &fc_host->rports, peers) 1677 fc_rport_set_dev_loss_tmo(rport, val); 1678 spin_unlock_irqrestore(shost->host_lock, flags); 1679 return count; 1680 } 1681 1682 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 1683 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 1684 show_fc_host_dev_loss_tmo, 1685 store_fc_private_host_dev_loss_tmo); 1686 1687 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1688 1689 /* 1690 * Host Statistics Management 1691 */ 1692 1693 /* Show a given an attribute in the statistics group */ 1694 static ssize_t 1695 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1696 { 1697 struct Scsi_Host *shost = transport_class_to_shost(dev); 1698 struct fc_internal *i = to_fc_internal(shost->transportt); 1699 struct fc_host_statistics *stats; 1700 ssize_t ret = -ENOENT; 1701 1702 if (offset > sizeof(struct fc_host_statistics) || 1703 offset % sizeof(u64) != 0) 1704 WARN_ON(1); 1705 1706 if (i->f->get_fc_host_stats) { 1707 stats = (i->f->get_fc_host_stats)(shost); 1708 if (stats) 1709 ret = snprintf(buf, 20, "0x%llx\n", 1710 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1711 } 1712 return ret; 1713 } 1714 1715 1716 /* generate a read-only statistics attribute */ 1717 #define fc_host_statistic(name) \ 1718 static ssize_t show_fcstat_##name(struct device *cd, \ 1719 struct device_attribute *attr, \ 1720 char *buf) \ 1721 { \ 1722 return fc_stat_show(cd, buf, \ 1723 offsetof(struct fc_host_statistics, name)); \ 1724 } \ 1725 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1726 1727 fc_host_statistic(seconds_since_last_reset); 1728 fc_host_statistic(tx_frames); 1729 fc_host_statistic(tx_words); 1730 fc_host_statistic(rx_frames); 1731 fc_host_statistic(rx_words); 1732 fc_host_statistic(lip_count); 1733 fc_host_statistic(nos_count); 1734 fc_host_statistic(error_frames); 1735 fc_host_statistic(dumped_frames); 1736 fc_host_statistic(link_failure_count); 1737 fc_host_statistic(loss_of_sync_count); 1738 fc_host_statistic(loss_of_signal_count); 1739 fc_host_statistic(prim_seq_protocol_err_count); 1740 fc_host_statistic(invalid_tx_word_count); 1741 fc_host_statistic(invalid_crc_count); 1742 fc_host_statistic(fcp_input_requests); 1743 fc_host_statistic(fcp_output_requests); 1744 fc_host_statistic(fcp_control_requests); 1745 fc_host_statistic(fcp_input_megabytes); 1746 fc_host_statistic(fcp_output_megabytes); 1747 fc_host_statistic(fcp_packet_alloc_failures); 1748 fc_host_statistic(fcp_packet_aborts); 1749 fc_host_statistic(fcp_frame_alloc_failures); 1750 fc_host_statistic(fc_no_free_exch); 1751 fc_host_statistic(fc_no_free_exch_xid); 1752 fc_host_statistic(fc_xid_not_found); 1753 fc_host_statistic(fc_xid_busy); 1754 fc_host_statistic(fc_seq_not_found); 1755 fc_host_statistic(fc_non_bls_resp); 1756 1757 static ssize_t 1758 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1759 const char *buf, size_t count) 1760 { 1761 struct Scsi_Host *shost = transport_class_to_shost(dev); 1762 struct fc_internal *i = to_fc_internal(shost->transportt); 1763 1764 /* ignore any data value written to the attribute */ 1765 if (i->f->reset_fc_host_stats) { 1766 i->f->reset_fc_host_stats(shost); 1767 return count; 1768 } 1769 1770 return -ENOENT; 1771 } 1772 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1773 fc_reset_statistics); 1774 1775 static struct attribute *fc_statistics_attrs[] = { 1776 &device_attr_host_seconds_since_last_reset.attr, 1777 &device_attr_host_tx_frames.attr, 1778 &device_attr_host_tx_words.attr, 1779 &device_attr_host_rx_frames.attr, 1780 &device_attr_host_rx_words.attr, 1781 &device_attr_host_lip_count.attr, 1782 &device_attr_host_nos_count.attr, 1783 &device_attr_host_error_frames.attr, 1784 &device_attr_host_dumped_frames.attr, 1785 &device_attr_host_link_failure_count.attr, 1786 &device_attr_host_loss_of_sync_count.attr, 1787 &device_attr_host_loss_of_signal_count.attr, 1788 &device_attr_host_prim_seq_protocol_err_count.attr, 1789 &device_attr_host_invalid_tx_word_count.attr, 1790 &device_attr_host_invalid_crc_count.attr, 1791 &device_attr_host_fcp_input_requests.attr, 1792 &device_attr_host_fcp_output_requests.attr, 1793 &device_attr_host_fcp_control_requests.attr, 1794 &device_attr_host_fcp_input_megabytes.attr, 1795 &device_attr_host_fcp_output_megabytes.attr, 1796 &device_attr_host_fcp_packet_alloc_failures.attr, 1797 &device_attr_host_fcp_packet_aborts.attr, 1798 &device_attr_host_fcp_frame_alloc_failures.attr, 1799 &device_attr_host_fc_no_free_exch.attr, 1800 &device_attr_host_fc_no_free_exch_xid.attr, 1801 &device_attr_host_fc_xid_not_found.attr, 1802 &device_attr_host_fc_xid_busy.attr, 1803 &device_attr_host_fc_seq_not_found.attr, 1804 &device_attr_host_fc_non_bls_resp.attr, 1805 &device_attr_host_reset_statistics.attr, 1806 NULL 1807 }; 1808 1809 static struct attribute_group fc_statistics_group = { 1810 .name = "statistics", 1811 .attrs = fc_statistics_attrs, 1812 }; 1813 1814 1815 /* Host Vport Attributes */ 1816 1817 static int 1818 fc_parse_wwn(const char *ns, u64 *nm) 1819 { 1820 unsigned int i, j; 1821 u8 wwn[8]; 1822 1823 memset(wwn, 0, sizeof(wwn)); 1824 1825 /* Validate and store the new name */ 1826 for (i=0, j=0; i < 16; i++) { 1827 int value; 1828 1829 value = hex_to_bin(*ns++); 1830 if (value >= 0) 1831 j = (j << 4) | value; 1832 else 1833 return -EINVAL; 1834 if (i % 2) { 1835 wwn[i/2] = j & 0xff; 1836 j = 0; 1837 } 1838 } 1839 1840 *nm = wwn_to_u64(wwn); 1841 1842 return 0; 1843 } 1844 1845 1846 /* 1847 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1848 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1849 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1850 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1851 */ 1852 static ssize_t 1853 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1854 const char *buf, size_t count) 1855 { 1856 struct Scsi_Host *shost = transport_class_to_shost(dev); 1857 struct fc_vport_identifiers vid; 1858 struct fc_vport *vport; 1859 unsigned int cnt=count; 1860 int stat; 1861 1862 memset(&vid, 0, sizeof(vid)); 1863 1864 /* count may include a LF at end of string */ 1865 if (buf[cnt-1] == '\n') 1866 cnt--; 1867 1868 /* validate we have enough characters for WWPN */ 1869 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1870 return -EINVAL; 1871 1872 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1873 if (stat) 1874 return stat; 1875 1876 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1877 if (stat) 1878 return stat; 1879 1880 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1881 vid.vport_type = FC_PORTTYPE_NPIV; 1882 /* vid.symbolic_name is already zero/NULL's */ 1883 vid.disable = false; /* always enabled */ 1884 1885 /* we only allow support on Channel 0 !!! */ 1886 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1887 return stat ? stat : count; 1888 } 1889 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1890 store_fc_host_vport_create); 1891 1892 1893 /* 1894 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1895 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1896 * The WWNs are specified as hex characters, and may *not* contain 1897 * any prefixes (e.g. 0x, x, etc) 1898 */ 1899 static ssize_t 1900 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1901 const char *buf, size_t count) 1902 { 1903 struct Scsi_Host *shost = transport_class_to_shost(dev); 1904 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1905 struct fc_vport *vport; 1906 u64 wwpn, wwnn; 1907 unsigned long flags; 1908 unsigned int cnt=count; 1909 int stat, match; 1910 1911 /* count may include a LF at end of string */ 1912 if (buf[cnt-1] == '\n') 1913 cnt--; 1914 1915 /* validate we have enough characters for WWPN */ 1916 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1917 return -EINVAL; 1918 1919 stat = fc_parse_wwn(&buf[0], &wwpn); 1920 if (stat) 1921 return stat; 1922 1923 stat = fc_parse_wwn(&buf[17], &wwnn); 1924 if (stat) 1925 return stat; 1926 1927 spin_lock_irqsave(shost->host_lock, flags); 1928 match = 0; 1929 /* we only allow support on Channel 0 !!! */ 1930 list_for_each_entry(vport, &fc_host->vports, peers) { 1931 if ((vport->channel == 0) && 1932 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1933 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1934 break; 1935 vport->flags |= FC_VPORT_DELETING; 1936 match = 1; 1937 break; 1938 } 1939 } 1940 spin_unlock_irqrestore(shost->host_lock, flags); 1941 1942 if (!match) 1943 return -ENODEV; 1944 1945 stat = fc_vport_terminate(vport); 1946 return stat ? stat : count; 1947 } 1948 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1949 store_fc_host_vport_delete); 1950 1951 1952 static int fc_host_match(struct attribute_container *cont, 1953 struct device *dev) 1954 { 1955 struct Scsi_Host *shost; 1956 struct fc_internal *i; 1957 1958 if (!scsi_is_host_device(dev)) 1959 return 0; 1960 1961 shost = dev_to_shost(dev); 1962 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1963 != &fc_host_class.class) 1964 return 0; 1965 1966 i = to_fc_internal(shost->transportt); 1967 1968 return &i->t.host_attrs.ac == cont; 1969 } 1970 1971 static int fc_target_match(struct attribute_container *cont, 1972 struct device *dev) 1973 { 1974 struct Scsi_Host *shost; 1975 struct fc_internal *i; 1976 1977 if (!scsi_is_target_device(dev)) 1978 return 0; 1979 1980 shost = dev_to_shost(dev->parent); 1981 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1982 != &fc_host_class.class) 1983 return 0; 1984 1985 i = to_fc_internal(shost->transportt); 1986 1987 return &i->t.target_attrs.ac == cont; 1988 } 1989 1990 static void fc_rport_dev_release(struct device *dev) 1991 { 1992 struct fc_rport *rport = dev_to_rport(dev); 1993 put_device(dev->parent); 1994 kfree(rport); 1995 } 1996 1997 int scsi_is_fc_rport(const struct device *dev) 1998 { 1999 return dev->release == fc_rport_dev_release; 2000 } 2001 EXPORT_SYMBOL(scsi_is_fc_rport); 2002 2003 static int fc_rport_match(struct attribute_container *cont, 2004 struct device *dev) 2005 { 2006 struct Scsi_Host *shost; 2007 struct fc_internal *i; 2008 2009 if (!scsi_is_fc_rport(dev)) 2010 return 0; 2011 2012 shost = dev_to_shost(dev->parent); 2013 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2014 != &fc_host_class.class) 2015 return 0; 2016 2017 i = to_fc_internal(shost->transportt); 2018 2019 return &i->rport_attr_cont.ac == cont; 2020 } 2021 2022 2023 static void fc_vport_dev_release(struct device *dev) 2024 { 2025 struct fc_vport *vport = dev_to_vport(dev); 2026 put_device(dev->parent); /* release kobj parent */ 2027 kfree(vport); 2028 } 2029 2030 static int scsi_is_fc_vport(const struct device *dev) 2031 { 2032 return dev->release == fc_vport_dev_release; 2033 } 2034 2035 static int fc_vport_match(struct attribute_container *cont, 2036 struct device *dev) 2037 { 2038 struct fc_vport *vport; 2039 struct Scsi_Host *shost; 2040 struct fc_internal *i; 2041 2042 if (!scsi_is_fc_vport(dev)) 2043 return 0; 2044 vport = dev_to_vport(dev); 2045 2046 shost = vport_to_shost(vport); 2047 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2048 != &fc_host_class.class) 2049 return 0; 2050 2051 i = to_fc_internal(shost->transportt); 2052 return &i->vport_attr_cont.ac == cont; 2053 } 2054 2055 2056 /** 2057 * fc_timed_out - FC Transport I/O timeout intercept handler 2058 * @scmd: The SCSI command which timed out 2059 * 2060 * This routine protects against error handlers getting invoked while a 2061 * rport is in a blocked state, typically due to a temporarily loss of 2062 * connectivity. If the error handlers are allowed to proceed, requests 2063 * to abort i/o, reset the target, etc will likely fail as there is no way 2064 * to communicate with the device to perform the requested function. These 2065 * failures may result in the midlayer taking the device offline, requiring 2066 * manual intervention to restore operation. 2067 * 2068 * This routine, called whenever an i/o times out, validates the state of 2069 * the underlying rport. If the rport is blocked, it returns 2070 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2071 * Eventually, either the device will return, or devloss_tmo will fire, 2072 * and when the timeout then fires, it will be handled normally. 2073 * If the rport is not blocked, normal error handling continues. 2074 * 2075 * Notes: 2076 * This routine assumes no locks are held on entry. 2077 */ 2078 static enum blk_eh_timer_return 2079 fc_timed_out(struct scsi_cmnd *scmd) 2080 { 2081 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2082 2083 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2084 return BLK_EH_RESET_TIMER; 2085 2086 return BLK_EH_NOT_HANDLED; 2087 } 2088 2089 /* 2090 * Called by fc_user_scan to locate an rport on the shost that 2091 * matches the channel and target id, and invoke scsi_scan_target() 2092 * on the rport. 2093 */ 2094 static void 2095 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2096 { 2097 struct fc_rport *rport; 2098 unsigned long flags; 2099 2100 spin_lock_irqsave(shost->host_lock, flags); 2101 2102 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2103 if (rport->scsi_target_id == -1) 2104 continue; 2105 2106 if (rport->port_state != FC_PORTSTATE_ONLINE) 2107 continue; 2108 2109 if ((channel == rport->channel) && 2110 (id == rport->scsi_target_id)) { 2111 spin_unlock_irqrestore(shost->host_lock, flags); 2112 scsi_scan_target(&rport->dev, channel, id, lun, 2113 SCSI_SCAN_MANUAL); 2114 return; 2115 } 2116 } 2117 2118 spin_unlock_irqrestore(shost->host_lock, flags); 2119 } 2120 2121 /* 2122 * Called via sysfs scan routines. Necessary, as the FC transport 2123 * wants to place all target objects below the rport object. So this 2124 * routine must invoke the scsi_scan_target() routine with the rport 2125 * object as the parent. 2126 */ 2127 static int 2128 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2129 { 2130 uint chlo, chhi; 2131 uint tgtlo, tgthi; 2132 2133 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2134 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2135 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2136 return -EINVAL; 2137 2138 if (channel == SCAN_WILD_CARD) { 2139 chlo = 0; 2140 chhi = shost->max_channel + 1; 2141 } else { 2142 chlo = channel; 2143 chhi = channel + 1; 2144 } 2145 2146 if (id == SCAN_WILD_CARD) { 2147 tgtlo = 0; 2148 tgthi = shost->max_id; 2149 } else { 2150 tgtlo = id; 2151 tgthi = id + 1; 2152 } 2153 2154 for ( ; chlo < chhi; chlo++) 2155 for ( ; tgtlo < tgthi; tgtlo++) 2156 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2157 2158 return 0; 2159 } 2160 2161 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, 2162 int result) 2163 { 2164 struct fc_internal *i = to_fc_internal(shost->transportt); 2165 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); 2166 } 2167 2168 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) 2169 { 2170 struct fc_internal *i = to_fc_internal(shost->transportt); 2171 return i->f->it_nexus_response(shost, nexus, result); 2172 } 2173 2174 struct scsi_transport_template * 2175 fc_attach_transport(struct fc_function_template *ft) 2176 { 2177 int count; 2178 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2179 GFP_KERNEL); 2180 2181 if (unlikely(!i)) 2182 return NULL; 2183 2184 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2185 i->t.target_attrs.ac.class = &fc_transport_class.class; 2186 i->t.target_attrs.ac.match = fc_target_match; 2187 i->t.target_size = sizeof(struct fc_starget_attrs); 2188 transport_container_register(&i->t.target_attrs); 2189 2190 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2191 i->t.host_attrs.ac.class = &fc_host_class.class; 2192 i->t.host_attrs.ac.match = fc_host_match; 2193 i->t.host_size = sizeof(struct fc_host_attrs); 2194 if (ft->get_fc_host_stats) 2195 i->t.host_attrs.statistics = &fc_statistics_group; 2196 transport_container_register(&i->t.host_attrs); 2197 2198 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2199 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2200 i->rport_attr_cont.ac.match = fc_rport_match; 2201 transport_container_register(&i->rport_attr_cont); 2202 2203 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2204 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2205 i->vport_attr_cont.ac.match = fc_vport_match; 2206 transport_container_register(&i->vport_attr_cont); 2207 2208 i->f = ft; 2209 2210 /* Transport uses the shost workq for scsi scanning */ 2211 i->t.create_work_queue = 1; 2212 2213 i->t.eh_timed_out = fc_timed_out; 2214 2215 i->t.user_scan = fc_user_scan; 2216 2217 /* target-mode drivers' functions */ 2218 i->t.tsk_mgmt_response = fc_tsk_mgmt_response; 2219 i->t.it_nexus_response = fc_it_nexus_response; 2220 2221 /* 2222 * Setup SCSI Target Attributes. 2223 */ 2224 count = 0; 2225 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2226 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2227 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2228 2229 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2230 2231 i->starget_attrs[count] = NULL; 2232 2233 2234 /* 2235 * Setup SCSI Host Attributes. 2236 */ 2237 count=0; 2238 SETUP_HOST_ATTRIBUTE_RD(node_name); 2239 SETUP_HOST_ATTRIBUTE_RD(port_name); 2240 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2241 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2242 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2243 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2244 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2245 if (ft->vport_create) { 2246 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2247 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2248 } 2249 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2250 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2251 SETUP_HOST_ATTRIBUTE_RD(model); 2252 SETUP_HOST_ATTRIBUTE_RD(model_description); 2253 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2254 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2255 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2256 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2257 2258 SETUP_HOST_ATTRIBUTE_RD(port_id); 2259 SETUP_HOST_ATTRIBUTE_RD(port_type); 2260 SETUP_HOST_ATTRIBUTE_RD(port_state); 2261 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2262 SETUP_HOST_ATTRIBUTE_RD(speed); 2263 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2264 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2265 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2266 2267 /* Transport-managed attributes */ 2268 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2269 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2270 if (ft->issue_fc_host_lip) 2271 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2272 if (ft->vport_create) 2273 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2274 if (ft->vport_delete) 2275 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2276 2277 BUG_ON(count > FC_HOST_NUM_ATTRS); 2278 2279 i->host_attrs[count] = NULL; 2280 2281 /* 2282 * Setup Remote Port Attributes. 2283 */ 2284 count=0; 2285 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2286 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2287 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2288 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2289 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2290 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2291 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2292 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2293 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2294 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2295 2296 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2297 2298 i->rport_attrs[count] = NULL; 2299 2300 /* 2301 * Setup Virtual Port Attributes. 2302 */ 2303 count=0; 2304 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2305 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2306 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2307 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2308 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2309 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2310 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2311 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2312 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2313 2314 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2315 2316 i->vport_attrs[count] = NULL; 2317 2318 return &i->t; 2319 } 2320 EXPORT_SYMBOL(fc_attach_transport); 2321 2322 void fc_release_transport(struct scsi_transport_template *t) 2323 { 2324 struct fc_internal *i = to_fc_internal(t); 2325 2326 transport_container_unregister(&i->t.target_attrs); 2327 transport_container_unregister(&i->t.host_attrs); 2328 transport_container_unregister(&i->rport_attr_cont); 2329 transport_container_unregister(&i->vport_attr_cont); 2330 2331 kfree(i); 2332 } 2333 EXPORT_SYMBOL(fc_release_transport); 2334 2335 /** 2336 * fc_queue_work - Queue work to the fc_host workqueue. 2337 * @shost: Pointer to Scsi_Host bound to fc_host. 2338 * @work: Work to queue for execution. 2339 * 2340 * Return value: 2341 * 1 - work queued for execution 2342 * 0 - work is already queued 2343 * -EINVAL - work queue doesn't exist 2344 */ 2345 static int 2346 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2347 { 2348 if (unlikely(!fc_host_work_q(shost))) { 2349 printk(KERN_ERR 2350 "ERROR: FC host '%s' attempted to queue work, " 2351 "when no workqueue created.\n", shost->hostt->name); 2352 dump_stack(); 2353 2354 return -EINVAL; 2355 } 2356 2357 return queue_work(fc_host_work_q(shost), work); 2358 } 2359 2360 /** 2361 * fc_flush_work - Flush a fc_host's workqueue. 2362 * @shost: Pointer to Scsi_Host bound to fc_host. 2363 */ 2364 static void 2365 fc_flush_work(struct Scsi_Host *shost) 2366 { 2367 if (!fc_host_work_q(shost)) { 2368 printk(KERN_ERR 2369 "ERROR: FC host '%s' attempted to flush work, " 2370 "when no workqueue created.\n", shost->hostt->name); 2371 dump_stack(); 2372 return; 2373 } 2374 2375 flush_workqueue(fc_host_work_q(shost)); 2376 } 2377 2378 /** 2379 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2380 * @shost: Pointer to Scsi_Host bound to fc_host. 2381 * @work: Work to queue for execution. 2382 * @delay: jiffies to delay the work queuing 2383 * 2384 * Return value: 2385 * 1 on success / 0 already queued / < 0 for error 2386 */ 2387 static int 2388 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2389 unsigned long delay) 2390 { 2391 if (unlikely(!fc_host_devloss_work_q(shost))) { 2392 printk(KERN_ERR 2393 "ERROR: FC host '%s' attempted to queue work, " 2394 "when no workqueue created.\n", shost->hostt->name); 2395 dump_stack(); 2396 2397 return -EINVAL; 2398 } 2399 2400 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2401 } 2402 2403 /** 2404 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2405 * @shost: Pointer to Scsi_Host bound to fc_host. 2406 */ 2407 static void 2408 fc_flush_devloss(struct Scsi_Host *shost) 2409 { 2410 if (!fc_host_devloss_work_q(shost)) { 2411 printk(KERN_ERR 2412 "ERROR: FC host '%s' attempted to flush work, " 2413 "when no workqueue created.\n", shost->hostt->name); 2414 dump_stack(); 2415 return; 2416 } 2417 2418 flush_workqueue(fc_host_devloss_work_q(shost)); 2419 } 2420 2421 2422 /** 2423 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2424 * @shost: Which &Scsi_Host 2425 * 2426 * This routine is expected to be called immediately preceding the 2427 * a driver's call to scsi_remove_host(). 2428 * 2429 * WARNING: A driver utilizing the fc_transport, which fails to call 2430 * this routine prior to scsi_remove_host(), will leave dangling 2431 * objects in /sys/class/fc_remote_ports. Access to any of these 2432 * objects can result in a system crash !!! 2433 * 2434 * Notes: 2435 * This routine assumes no locks are held on entry. 2436 */ 2437 void 2438 fc_remove_host(struct Scsi_Host *shost) 2439 { 2440 struct fc_vport *vport = NULL, *next_vport = NULL; 2441 struct fc_rport *rport = NULL, *next_rport = NULL; 2442 struct workqueue_struct *work_q; 2443 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2444 unsigned long flags; 2445 2446 spin_lock_irqsave(shost->host_lock, flags); 2447 2448 /* Remove any vports */ 2449 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) 2450 fc_queue_work(shost, &vport->vport_delete_work); 2451 2452 /* Remove any remote ports */ 2453 list_for_each_entry_safe(rport, next_rport, 2454 &fc_host->rports, peers) { 2455 list_del(&rport->peers); 2456 rport->port_state = FC_PORTSTATE_DELETED; 2457 fc_queue_work(shost, &rport->rport_delete_work); 2458 } 2459 2460 list_for_each_entry_safe(rport, next_rport, 2461 &fc_host->rport_bindings, peers) { 2462 list_del(&rport->peers); 2463 rport->port_state = FC_PORTSTATE_DELETED; 2464 fc_queue_work(shost, &rport->rport_delete_work); 2465 } 2466 2467 spin_unlock_irqrestore(shost->host_lock, flags); 2468 2469 /* flush all scan work items */ 2470 scsi_flush_work(shost); 2471 2472 /* flush all stgt delete, and rport delete work items, then kill it */ 2473 if (fc_host->work_q) { 2474 work_q = fc_host->work_q; 2475 fc_host->work_q = NULL; 2476 destroy_workqueue(work_q); 2477 } 2478 2479 /* flush all devloss work items, then kill it */ 2480 if (fc_host->devloss_work_q) { 2481 work_q = fc_host->devloss_work_q; 2482 fc_host->devloss_work_q = NULL; 2483 destroy_workqueue(work_q); 2484 } 2485 } 2486 EXPORT_SYMBOL(fc_remove_host); 2487 2488 static void fc_terminate_rport_io(struct fc_rport *rport) 2489 { 2490 struct Scsi_Host *shost = rport_to_shost(rport); 2491 struct fc_internal *i = to_fc_internal(shost->transportt); 2492 2493 /* Involve the LLDD if possible to terminate all io on the rport. */ 2494 if (i->f->terminate_rport_io) 2495 i->f->terminate_rport_io(rport); 2496 2497 /* 2498 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2499 */ 2500 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2501 } 2502 2503 /** 2504 * fc_starget_delete - called to delete the scsi descendants of an rport 2505 * @work: remote port to be operated on. 2506 * 2507 * Deletes target and all sdevs. 2508 */ 2509 static void 2510 fc_starget_delete(struct work_struct *work) 2511 { 2512 struct fc_rport *rport = 2513 container_of(work, struct fc_rport, stgt_delete_work); 2514 2515 fc_terminate_rport_io(rport); 2516 scsi_remove_target(&rport->dev); 2517 } 2518 2519 2520 /** 2521 * fc_rport_final_delete - finish rport termination and delete it. 2522 * @work: remote port to be deleted. 2523 */ 2524 static void 2525 fc_rport_final_delete(struct work_struct *work) 2526 { 2527 struct fc_rport *rport = 2528 container_of(work, struct fc_rport, rport_delete_work); 2529 struct device *dev = &rport->dev; 2530 struct Scsi_Host *shost = rport_to_shost(rport); 2531 struct fc_internal *i = to_fc_internal(shost->transportt); 2532 unsigned long flags; 2533 int do_callback = 0; 2534 2535 fc_terminate_rport_io(rport); 2536 2537 /* 2538 * if a scan is pending, flush the SCSI Host work_q so that 2539 * that we can reclaim the rport scan work element. 2540 */ 2541 if (rport->flags & FC_RPORT_SCAN_PENDING) 2542 scsi_flush_work(shost); 2543 2544 /* 2545 * Cancel any outstanding timers. These should really exist 2546 * only when rmmod'ing the LLDD and we're asking for 2547 * immediate termination of the rports 2548 */ 2549 spin_lock_irqsave(shost->host_lock, flags); 2550 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2551 spin_unlock_irqrestore(shost->host_lock, flags); 2552 if (!cancel_delayed_work(&rport->fail_io_work)) 2553 fc_flush_devloss(shost); 2554 if (!cancel_delayed_work(&rport->dev_loss_work)) 2555 fc_flush_devloss(shost); 2556 cancel_work_sync(&rport->scan_work); 2557 spin_lock_irqsave(shost->host_lock, flags); 2558 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2559 } 2560 spin_unlock_irqrestore(shost->host_lock, flags); 2561 2562 /* Delete SCSI target and sdevs */ 2563 if (rport->scsi_target_id != -1) 2564 fc_starget_delete(&rport->stgt_delete_work); 2565 2566 /* 2567 * Notify the driver that the rport is now dead. The LLDD will 2568 * also guarantee that any communication to the rport is terminated 2569 * 2570 * Avoid this call if we already called it when we preserved the 2571 * rport for the binding. 2572 */ 2573 spin_lock_irqsave(shost->host_lock, flags); 2574 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2575 (i->f->dev_loss_tmo_callbk)) { 2576 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2577 do_callback = 1; 2578 } 2579 spin_unlock_irqrestore(shost->host_lock, flags); 2580 2581 if (do_callback) 2582 i->f->dev_loss_tmo_callbk(rport); 2583 2584 fc_bsg_remove(rport->rqst_q); 2585 2586 transport_remove_device(dev); 2587 device_del(dev); 2588 transport_destroy_device(dev); 2589 scsi_host_put(shost); /* for fc_host->rport list */ 2590 put_device(dev); /* for self-reference */ 2591 } 2592 2593 2594 /** 2595 * fc_rport_create - allocates and creates a remote FC port. 2596 * @shost: scsi host the remote port is connected to. 2597 * @channel: Channel on shost port connected to. 2598 * @ids: The world wide names, fc address, and FC4 port 2599 * roles for the remote port. 2600 * 2601 * Allocates and creates the remoter port structure, including the 2602 * class and sysfs creation. 2603 * 2604 * Notes: 2605 * This routine assumes no locks are held on entry. 2606 */ 2607 static struct fc_rport * 2608 fc_rport_create(struct Scsi_Host *shost, int channel, 2609 struct fc_rport_identifiers *ids) 2610 { 2611 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2612 struct fc_internal *fci = to_fc_internal(shost->transportt); 2613 struct fc_rport *rport; 2614 struct device *dev; 2615 unsigned long flags; 2616 int error; 2617 size_t size; 2618 2619 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2620 rport = kzalloc(size, GFP_KERNEL); 2621 if (unlikely(!rport)) { 2622 printk(KERN_ERR "%s: allocation failure\n", __func__); 2623 return NULL; 2624 } 2625 2626 rport->maxframe_size = -1; 2627 rport->supported_classes = FC_COS_UNSPECIFIED; 2628 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2629 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2630 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2631 rport->port_id = ids->port_id; 2632 rport->roles = ids->roles; 2633 rport->port_state = FC_PORTSTATE_ONLINE; 2634 if (fci->f->dd_fcrport_size) 2635 rport->dd_data = &rport[1]; 2636 rport->channel = channel; 2637 rport->fast_io_fail_tmo = -1; 2638 2639 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2640 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2641 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2642 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2643 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2644 2645 spin_lock_irqsave(shost->host_lock, flags); 2646 2647 rport->number = fc_host->next_rport_number++; 2648 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) 2649 rport->scsi_target_id = fc_host->next_target_id++; 2650 else 2651 rport->scsi_target_id = -1; 2652 list_add_tail(&rport->peers, &fc_host->rports); 2653 scsi_host_get(shost); /* for fc_host->rport list */ 2654 2655 spin_unlock_irqrestore(shost->host_lock, flags); 2656 2657 dev = &rport->dev; 2658 device_initialize(dev); /* takes self reference */ 2659 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2660 dev->release = fc_rport_dev_release; 2661 dev_set_name(dev, "rport-%d:%d-%d", 2662 shost->host_no, channel, rport->number); 2663 transport_setup_device(dev); 2664 2665 error = device_add(dev); 2666 if (error) { 2667 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2668 goto delete_rport; 2669 } 2670 transport_add_device(dev); 2671 transport_configure_device(dev); 2672 2673 fc_bsg_rportadd(shost, rport); 2674 /* ignore any bsg add error - we just can't do sgio */ 2675 2676 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2677 /* initiate a scan of the target */ 2678 rport->flags |= FC_RPORT_SCAN_PENDING; 2679 scsi_queue_work(shost, &rport->scan_work); 2680 } 2681 2682 return rport; 2683 2684 delete_rport: 2685 transport_destroy_device(dev); 2686 spin_lock_irqsave(shost->host_lock, flags); 2687 list_del(&rport->peers); 2688 scsi_host_put(shost); /* for fc_host->rport list */ 2689 spin_unlock_irqrestore(shost->host_lock, flags); 2690 put_device(dev->parent); 2691 kfree(rport); 2692 return NULL; 2693 } 2694 2695 /** 2696 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2697 * @shost: scsi host the remote port is connected to. 2698 * @channel: Channel on shost port connected to. 2699 * @ids: The world wide names, fc address, and FC4 port 2700 * roles for the remote port. 2701 * 2702 * The LLDD calls this routine to notify the transport of the existence 2703 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2704 * of the port, it's FC address (port_id), and the FC4 roles that are 2705 * active for the port. 2706 * 2707 * For ports that are FCP targets (aka scsi targets), the FC transport 2708 * maintains consistent target id bindings on behalf of the LLDD. 2709 * A consistent target id binding is an assignment of a target id to 2710 * a remote port identifier, which persists while the scsi host is 2711 * attached. The remote port can disappear, then later reappear, and 2712 * it's target id assignment remains the same. This allows for shifts 2713 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2714 * changes to the scsi subsystem which is based on scsi host number and 2715 * target id values. Bindings are only valid during the attachment of 2716 * the scsi host. If the host detaches, then later re-attaches, target 2717 * id bindings may change. 2718 * 2719 * This routine is responsible for returning a remote port structure. 2720 * The routine will search the list of remote ports it maintains 2721 * internally on behalf of consistent target id mappings. If found, the 2722 * remote port structure will be reused. Otherwise, a new remote port 2723 * structure will be allocated. 2724 * 2725 * Whenever a remote port is allocated, a new fc_remote_port class 2726 * device is created. 2727 * 2728 * Should not be called from interrupt context. 2729 * 2730 * Notes: 2731 * This routine assumes no locks are held on entry. 2732 */ 2733 struct fc_rport * 2734 fc_remote_port_add(struct Scsi_Host *shost, int channel, 2735 struct fc_rport_identifiers *ids) 2736 { 2737 struct fc_internal *fci = to_fc_internal(shost->transportt); 2738 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2739 struct fc_rport *rport; 2740 unsigned long flags; 2741 int match = 0; 2742 2743 /* ensure any stgt delete functions are done */ 2744 fc_flush_work(shost); 2745 2746 /* 2747 * Search the list of "active" rports, for an rport that has been 2748 * deleted, but we've held off the real delete while the target 2749 * is in a "blocked" state. 2750 */ 2751 spin_lock_irqsave(shost->host_lock, flags); 2752 2753 list_for_each_entry(rport, &fc_host->rports, peers) { 2754 2755 if ((rport->port_state == FC_PORTSTATE_BLOCKED) && 2756 (rport->channel == channel)) { 2757 2758 switch (fc_host->tgtid_bind_type) { 2759 case FC_TGTID_BIND_BY_WWPN: 2760 case FC_TGTID_BIND_NONE: 2761 if (rport->port_name == ids->port_name) 2762 match = 1; 2763 break; 2764 case FC_TGTID_BIND_BY_WWNN: 2765 if (rport->node_name == ids->node_name) 2766 match = 1; 2767 break; 2768 case FC_TGTID_BIND_BY_ID: 2769 if (rport->port_id == ids->port_id) 2770 match = 1; 2771 break; 2772 } 2773 2774 if (match) { 2775 2776 memcpy(&rport->node_name, &ids->node_name, 2777 sizeof(rport->node_name)); 2778 memcpy(&rport->port_name, &ids->port_name, 2779 sizeof(rport->port_name)); 2780 rport->port_id = ids->port_id; 2781 2782 rport->port_state = FC_PORTSTATE_ONLINE; 2783 rport->roles = ids->roles; 2784 2785 spin_unlock_irqrestore(shost->host_lock, flags); 2786 2787 if (fci->f->dd_fcrport_size) 2788 memset(rport->dd_data, 0, 2789 fci->f->dd_fcrport_size); 2790 2791 /* 2792 * If we were not a target, cancel the 2793 * io terminate and rport timers, and 2794 * we're done. 2795 * 2796 * If we were a target, but our new role 2797 * doesn't indicate a target, leave the 2798 * timers running expecting the role to 2799 * change as the target fully logs in. If 2800 * it doesn't, the target will be torn down. 2801 * 2802 * If we were a target, and our role shows 2803 * we're still a target, cancel the timers 2804 * and kick off a scan. 2805 */ 2806 2807 /* was a target, not in roles */ 2808 if ((rport->scsi_target_id != -1) && 2809 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2810 return rport; 2811 2812 /* 2813 * Stop the fail io and dev_loss timers. 2814 * If they flush, the port_state will 2815 * be checked and will NOOP the function. 2816 */ 2817 if (!cancel_delayed_work(&rport->fail_io_work)) 2818 fc_flush_devloss(shost); 2819 if (!cancel_delayed_work(&rport->dev_loss_work)) 2820 fc_flush_devloss(shost); 2821 2822 spin_lock_irqsave(shost->host_lock, flags); 2823 2824 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2825 FC_RPORT_DEVLOSS_PENDING | 2826 FC_RPORT_DEVLOSS_CALLBK_DONE); 2827 2828 spin_unlock_irqrestore(shost->host_lock, flags); 2829 2830 /* if target, initiate a scan */ 2831 if (rport->scsi_target_id != -1) { 2832 scsi_target_unblock(&rport->dev, 2833 SDEV_RUNNING); 2834 spin_lock_irqsave(shost->host_lock, 2835 flags); 2836 rport->flags |= FC_RPORT_SCAN_PENDING; 2837 scsi_queue_work(shost, 2838 &rport->scan_work); 2839 spin_unlock_irqrestore(shost->host_lock, 2840 flags); 2841 } 2842 2843 fc_bsg_goose_queue(rport); 2844 2845 return rport; 2846 } 2847 } 2848 } 2849 2850 /* 2851 * Search the bindings array 2852 * Note: if never a FCP target, you won't be on this list 2853 */ 2854 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2855 2856 /* search for a matching consistent binding */ 2857 2858 list_for_each_entry(rport, &fc_host->rport_bindings, 2859 peers) { 2860 if (rport->channel != channel) 2861 continue; 2862 2863 switch (fc_host->tgtid_bind_type) { 2864 case FC_TGTID_BIND_BY_WWPN: 2865 if (rport->port_name == ids->port_name) 2866 match = 1; 2867 break; 2868 case FC_TGTID_BIND_BY_WWNN: 2869 if (rport->node_name == ids->node_name) 2870 match = 1; 2871 break; 2872 case FC_TGTID_BIND_BY_ID: 2873 if (rport->port_id == ids->port_id) 2874 match = 1; 2875 break; 2876 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2877 break; 2878 } 2879 2880 if (match) { 2881 list_move_tail(&rport->peers, &fc_host->rports); 2882 break; 2883 } 2884 } 2885 2886 if (match) { 2887 memcpy(&rport->node_name, &ids->node_name, 2888 sizeof(rport->node_name)); 2889 memcpy(&rport->port_name, &ids->port_name, 2890 sizeof(rport->port_name)); 2891 rport->port_id = ids->port_id; 2892 rport->roles = ids->roles; 2893 rport->port_state = FC_PORTSTATE_ONLINE; 2894 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2895 2896 if (fci->f->dd_fcrport_size) 2897 memset(rport->dd_data, 0, 2898 fci->f->dd_fcrport_size); 2899 spin_unlock_irqrestore(shost->host_lock, flags); 2900 2901 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) { 2902 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 2903 2904 /* initiate a scan of the target */ 2905 spin_lock_irqsave(shost->host_lock, flags); 2906 rport->flags |= FC_RPORT_SCAN_PENDING; 2907 scsi_queue_work(shost, &rport->scan_work); 2908 spin_unlock_irqrestore(shost->host_lock, flags); 2909 } 2910 return rport; 2911 } 2912 } 2913 2914 spin_unlock_irqrestore(shost->host_lock, flags); 2915 2916 /* No consistent binding found - create new remote port entry */ 2917 rport = fc_rport_create(shost, channel, ids); 2918 2919 return rport; 2920 } 2921 EXPORT_SYMBOL(fc_remote_port_add); 2922 2923 2924 /** 2925 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2926 * @rport: The remote port that no longer exists 2927 * 2928 * The LLDD calls this routine to notify the transport that a remote 2929 * port is no longer part of the topology. Note: Although a port 2930 * may no longer be part of the topology, it may persist in the remote 2931 * ports displayed by the fc_host. We do this under 2 conditions: 2932 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2933 * This allows the port to temporarily disappear, then reappear without 2934 * disrupting the SCSI device tree attached to it. During the "blocked" 2935 * period the port will still exist. 2936 * 2) If the port was a scsi target and disappears for longer than we 2937 * expect, we'll delete the port and the tear down the SCSI device tree 2938 * attached to it. However, we want to semi-persist the target id assigned 2939 * to that port if it eventually does exist. The port structure will 2940 * remain (although with minimal information) so that the target id 2941 * bindings remails. 2942 * 2943 * If the remote port is not an FCP Target, it will be fully torn down 2944 * and deallocated, including the fc_remote_port class device. 2945 * 2946 * If the remote port is an FCP Target, the port will be placed in a 2947 * temporary blocked state. From the LLDD's perspective, the rport no 2948 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2949 * exists, but all sdevs on it are blocked from further I/O. The following 2950 * is then expected. 2951 * 2952 * If the remote port does not return (signaled by a LLDD call to 2953 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2954 * scsi target is removed - killing all outstanding i/o and removing the 2955 * scsi devices attached ot it. The port structure will be marked Not 2956 * Present and be partially cleared, leaving only enough information to 2957 * recognize the remote port relative to the scsi target id binding if 2958 * it later appears. The port will remain as long as there is a valid 2959 * binding (e.g. until the user changes the binding type or unloads the 2960 * scsi host with the binding). 2961 * 2962 * If the remote port returns within the dev_loss_tmo value (and matches 2963 * according to the target id binding type), the port structure will be 2964 * reused. If it is no longer a SCSI target, the target will be torn 2965 * down. If it continues to be a SCSI target, then the target will be 2966 * unblocked (allowing i/o to be resumed), and a scan will be activated 2967 * to ensure that all luns are detected. 2968 * 2969 * Called from normal process context only - cannot be called from interrupt. 2970 * 2971 * Notes: 2972 * This routine assumes no locks are held on entry. 2973 */ 2974 void 2975 fc_remote_port_delete(struct fc_rport *rport) 2976 { 2977 struct Scsi_Host *shost = rport_to_shost(rport); 2978 unsigned long timeout = rport->dev_loss_tmo; 2979 unsigned long flags; 2980 2981 /* 2982 * No need to flush the fc_host work_q's, as all adds are synchronous. 2983 * 2984 * We do need to reclaim the rport scan work element, so eventually 2985 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2986 * there's still a scan pending. 2987 */ 2988 2989 spin_lock_irqsave(shost->host_lock, flags); 2990 2991 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2992 spin_unlock_irqrestore(shost->host_lock, flags); 2993 return; 2994 } 2995 2996 /* 2997 * In the past, we if this was not an FCP-Target, we would 2998 * unconditionally just jump to deleting the rport. 2999 * However, rports can be used as node containers by the LLDD, 3000 * and its not appropriate to just terminate the rport at the 3001 * first sign of a loss in connectivity. The LLDD may want to 3002 * send ELS traffic to re-validate the login. If the rport is 3003 * immediately deleted, it makes it inappropriate for a node 3004 * container. 3005 * So... we now unconditionally wait dev_loss_tmo before 3006 * destroying an rport. 3007 */ 3008 3009 rport->port_state = FC_PORTSTATE_BLOCKED; 3010 3011 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3012 3013 spin_unlock_irqrestore(shost->host_lock, flags); 3014 3015 scsi_target_block(&rport->dev); 3016 3017 /* see if we need to kill io faster than waiting for device loss */ 3018 if ((rport->fast_io_fail_tmo != -1) && 3019 (rport->fast_io_fail_tmo < timeout)) 3020 fc_queue_devloss_work(shost, &rport->fail_io_work, 3021 rport->fast_io_fail_tmo * HZ); 3022 3023 /* cap the length the devices can be blocked until they are deleted */ 3024 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3025 } 3026 EXPORT_SYMBOL(fc_remote_port_delete); 3027 3028 /** 3029 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3030 * @rport: The remote port that changed. 3031 * @roles: New roles for this port. 3032 * 3033 * Description: The LLDD calls this routine to notify the transport that the 3034 * roles on a remote port may have changed. The largest effect of this is 3035 * if a port now becomes a FCP Target, it must be allocated a 3036 * scsi target id. If the port is no longer a FCP target, any 3037 * scsi target id value assigned to it will persist in case the 3038 * role changes back to include FCP Target. No changes in the scsi 3039 * midlayer will be invoked if the role changes (in the expectation 3040 * that the role will be resumed. If it doesn't normal error processing 3041 * will take place). 3042 * 3043 * Should not be called from interrupt context. 3044 * 3045 * Notes: 3046 * This routine assumes no locks are held on entry. 3047 */ 3048 void 3049 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3050 { 3051 struct Scsi_Host *shost = rport_to_shost(rport); 3052 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3053 unsigned long flags; 3054 int create = 0; 3055 3056 spin_lock_irqsave(shost->host_lock, flags); 3057 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3058 if (rport->scsi_target_id == -1) { 3059 rport->scsi_target_id = fc_host->next_target_id++; 3060 create = 1; 3061 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3062 create = 1; 3063 } 3064 3065 rport->roles = roles; 3066 3067 spin_unlock_irqrestore(shost->host_lock, flags); 3068 3069 if (create) { 3070 /* 3071 * There may have been a delete timer running on the 3072 * port. Ensure that it is cancelled as we now know 3073 * the port is an FCP Target. 3074 * Note: we know the rport is exists and in an online 3075 * state as the LLDD would not have had an rport 3076 * reference to pass us. 3077 * 3078 * Take no action on the del_timer failure as the state 3079 * machine state change will validate the 3080 * transaction. 3081 */ 3082 if (!cancel_delayed_work(&rport->fail_io_work)) 3083 fc_flush_devloss(shost); 3084 if (!cancel_delayed_work(&rport->dev_loss_work)) 3085 fc_flush_devloss(shost); 3086 3087 spin_lock_irqsave(shost->host_lock, flags); 3088 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3089 FC_RPORT_DEVLOSS_PENDING | 3090 FC_RPORT_DEVLOSS_CALLBK_DONE); 3091 spin_unlock_irqrestore(shost->host_lock, flags); 3092 3093 /* ensure any stgt delete functions are done */ 3094 fc_flush_work(shost); 3095 3096 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3097 /* initiate a scan of the target */ 3098 spin_lock_irqsave(shost->host_lock, flags); 3099 rport->flags |= FC_RPORT_SCAN_PENDING; 3100 scsi_queue_work(shost, &rport->scan_work); 3101 spin_unlock_irqrestore(shost->host_lock, flags); 3102 } 3103 } 3104 EXPORT_SYMBOL(fc_remote_port_rolechg); 3105 3106 /** 3107 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3108 * @work: rport target that failed to reappear in the allotted time. 3109 * 3110 * Description: An attempt to delete a remote port blocks, and if it fails 3111 * to return in the allotted time this gets called. 3112 */ 3113 static void 3114 fc_timeout_deleted_rport(struct work_struct *work) 3115 { 3116 struct fc_rport *rport = 3117 container_of(work, struct fc_rport, dev_loss_work.work); 3118 struct Scsi_Host *shost = rport_to_shost(rport); 3119 struct fc_internal *i = to_fc_internal(shost->transportt); 3120 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3121 unsigned long flags; 3122 int do_callback = 0; 3123 3124 spin_lock_irqsave(shost->host_lock, flags); 3125 3126 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3127 3128 /* 3129 * If the port is ONLINE, then it came back. If it was a SCSI 3130 * target, validate it still is. If not, tear down the 3131 * scsi_target on it. 3132 */ 3133 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3134 (rport->scsi_target_id != -1) && 3135 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3136 dev_printk(KERN_ERR, &rport->dev, 3137 "blocked FC remote port time out: no longer" 3138 " a FCP target, removing starget\n"); 3139 spin_unlock_irqrestore(shost->host_lock, flags); 3140 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3141 fc_queue_work(shost, &rport->stgt_delete_work); 3142 return; 3143 } 3144 3145 /* NOOP state - we're flushing workq's */ 3146 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3147 spin_unlock_irqrestore(shost->host_lock, flags); 3148 dev_printk(KERN_ERR, &rport->dev, 3149 "blocked FC remote port time out: leaving" 3150 " rport%s alone\n", 3151 (rport->scsi_target_id != -1) ? " and starget" : ""); 3152 return; 3153 } 3154 3155 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3156 (rport->scsi_target_id == -1)) { 3157 list_del(&rport->peers); 3158 rport->port_state = FC_PORTSTATE_DELETED; 3159 dev_printk(KERN_ERR, &rport->dev, 3160 "blocked FC remote port time out: removing" 3161 " rport%s\n", 3162 (rport->scsi_target_id != -1) ? " and starget" : ""); 3163 fc_queue_work(shost, &rport->rport_delete_work); 3164 spin_unlock_irqrestore(shost->host_lock, flags); 3165 return; 3166 } 3167 3168 dev_printk(KERN_ERR, &rport->dev, 3169 "blocked FC remote port time out: removing target and " 3170 "saving binding\n"); 3171 3172 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3173 3174 /* 3175 * Note: We do not remove or clear the hostdata area. This allows 3176 * host-specific target data to persist along with the 3177 * scsi_target_id. It's up to the host to manage it's hostdata area. 3178 */ 3179 3180 /* 3181 * Reinitialize port attributes that may change if the port comes back. 3182 */ 3183 rport->maxframe_size = -1; 3184 rport->supported_classes = FC_COS_UNSPECIFIED; 3185 rport->roles = FC_PORT_ROLE_UNKNOWN; 3186 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3187 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3188 3189 /* 3190 * Pre-emptively kill I/O rather than waiting for the work queue 3191 * item to teardown the starget. (FCOE libFC folks prefer this 3192 * and to have the rport_port_id still set when it's done). 3193 */ 3194 spin_unlock_irqrestore(shost->host_lock, flags); 3195 fc_terminate_rport_io(rport); 3196 3197 spin_lock_irqsave(shost->host_lock, flags); 3198 3199 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3200 3201 /* remove the identifiers that aren't used in the consisting binding */ 3202 switch (fc_host->tgtid_bind_type) { 3203 case FC_TGTID_BIND_BY_WWPN: 3204 rport->node_name = -1; 3205 rport->port_id = -1; 3206 break; 3207 case FC_TGTID_BIND_BY_WWNN: 3208 rport->port_name = -1; 3209 rport->port_id = -1; 3210 break; 3211 case FC_TGTID_BIND_BY_ID: 3212 rport->node_name = -1; 3213 rport->port_name = -1; 3214 break; 3215 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3216 break; 3217 } 3218 3219 /* 3220 * As this only occurs if the remote port (scsi target) 3221 * went away and didn't come back - we'll remove 3222 * all attached scsi devices. 3223 */ 3224 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3225 fc_queue_work(shost, &rport->stgt_delete_work); 3226 3227 do_callback = 1; 3228 } 3229 3230 spin_unlock_irqrestore(shost->host_lock, flags); 3231 3232 /* 3233 * Notify the driver that the rport is now dead. The LLDD will 3234 * also guarantee that any communication to the rport is terminated 3235 * 3236 * Note: we set the CALLBK_DONE flag above to correspond 3237 */ 3238 if (do_callback && i->f->dev_loss_tmo_callbk) 3239 i->f->dev_loss_tmo_callbk(rport); 3240 } 3241 3242 3243 /** 3244 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3245 * @work: rport to terminate io on. 3246 * 3247 * Notes: Only requests the failure of the io, not that all are flushed 3248 * prior to returning. 3249 */ 3250 static void 3251 fc_timeout_fail_rport_io(struct work_struct *work) 3252 { 3253 struct fc_rport *rport = 3254 container_of(work, struct fc_rport, fail_io_work.work); 3255 3256 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3257 return; 3258 3259 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3260 fc_terminate_rport_io(rport); 3261 } 3262 3263 /** 3264 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3265 * @work: remote port to be scanned. 3266 */ 3267 static void 3268 fc_scsi_scan_rport(struct work_struct *work) 3269 { 3270 struct fc_rport *rport = 3271 container_of(work, struct fc_rport, scan_work); 3272 struct Scsi_Host *shost = rport_to_shost(rport); 3273 struct fc_internal *i = to_fc_internal(shost->transportt); 3274 unsigned long flags; 3275 3276 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3277 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3278 !(i->f->disable_target_scan)) { 3279 scsi_scan_target(&rport->dev, rport->channel, 3280 rport->scsi_target_id, SCAN_WILD_CARD, 3281 SCSI_SCAN_RESCAN); 3282 } 3283 3284 spin_lock_irqsave(shost->host_lock, flags); 3285 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3286 spin_unlock_irqrestore(shost->host_lock, flags); 3287 } 3288 3289 /** 3290 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3291 * @cmnd: SCSI command that scsi_eh is trying to recover 3292 * 3293 * This routine can be called from a FC LLD scsi_eh callback. It 3294 * blocks the scsi_eh thread until the fc_rport leaves the 3295 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3296 * necessary to avoid the scsi_eh failing recovery actions for blocked 3297 * rports which would lead to offlined SCSI devices. 3298 * 3299 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3300 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3301 * passed back to scsi_eh. 3302 */ 3303 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3304 { 3305 struct Scsi_Host *shost = cmnd->device->host; 3306 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3307 unsigned long flags; 3308 3309 spin_lock_irqsave(shost->host_lock, flags); 3310 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3311 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3312 spin_unlock_irqrestore(shost->host_lock, flags); 3313 msleep(1000); 3314 spin_lock_irqsave(shost->host_lock, flags); 3315 } 3316 spin_unlock_irqrestore(shost->host_lock, flags); 3317 3318 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3319 return FAST_IO_FAIL; 3320 3321 return 0; 3322 } 3323 EXPORT_SYMBOL(fc_block_scsi_eh); 3324 3325 /** 3326 * fc_vport_setup - allocates and creates a FC virtual port. 3327 * @shost: scsi host the virtual port is connected to. 3328 * @channel: Channel on shost port connected to. 3329 * @pdev: parent device for vport 3330 * @ids: The world wide names, FC4 port roles, etc for 3331 * the virtual port. 3332 * @ret_vport: The pointer to the created vport. 3333 * 3334 * Allocates and creates the vport structure, calls the parent host 3335 * to instantiate the vport, the completes w/ class and sysfs creation. 3336 * 3337 * Notes: 3338 * This routine assumes no locks are held on entry. 3339 */ 3340 static int 3341 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3342 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3343 { 3344 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3345 struct fc_internal *fci = to_fc_internal(shost->transportt); 3346 struct fc_vport *vport; 3347 struct device *dev; 3348 unsigned long flags; 3349 size_t size; 3350 int error; 3351 3352 *ret_vport = NULL; 3353 3354 if ( ! fci->f->vport_create) 3355 return -ENOENT; 3356 3357 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3358 vport = kzalloc(size, GFP_KERNEL); 3359 if (unlikely(!vport)) { 3360 printk(KERN_ERR "%s: allocation failure\n", __func__); 3361 return -ENOMEM; 3362 } 3363 3364 vport->vport_state = FC_VPORT_UNKNOWN; 3365 vport->vport_last_state = FC_VPORT_UNKNOWN; 3366 vport->node_name = ids->node_name; 3367 vport->port_name = ids->port_name; 3368 vport->roles = ids->roles; 3369 vport->vport_type = ids->vport_type; 3370 if (fci->f->dd_fcvport_size) 3371 vport->dd_data = &vport[1]; 3372 vport->shost = shost; 3373 vport->channel = channel; 3374 vport->flags = FC_VPORT_CREATING; 3375 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3376 3377 spin_lock_irqsave(shost->host_lock, flags); 3378 3379 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3380 spin_unlock_irqrestore(shost->host_lock, flags); 3381 kfree(vport); 3382 return -ENOSPC; 3383 } 3384 fc_host->npiv_vports_inuse++; 3385 vport->number = fc_host->next_vport_number++; 3386 list_add_tail(&vport->peers, &fc_host->vports); 3387 scsi_host_get(shost); /* for fc_host->vport list */ 3388 3389 spin_unlock_irqrestore(shost->host_lock, flags); 3390 3391 dev = &vport->dev; 3392 device_initialize(dev); /* takes self reference */ 3393 dev->parent = get_device(pdev); /* takes parent reference */ 3394 dev->release = fc_vport_dev_release; 3395 dev_set_name(dev, "vport-%d:%d-%d", 3396 shost->host_no, channel, vport->number); 3397 transport_setup_device(dev); 3398 3399 error = device_add(dev); 3400 if (error) { 3401 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3402 goto delete_vport; 3403 } 3404 transport_add_device(dev); 3405 transport_configure_device(dev); 3406 3407 error = fci->f->vport_create(vport, ids->disable); 3408 if (error) { 3409 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3410 goto delete_vport_all; 3411 } 3412 3413 /* 3414 * if the parent isn't the physical adapter's Scsi_Host, ensure 3415 * the Scsi_Host at least contains ia symlink to the vport. 3416 */ 3417 if (pdev != &shost->shost_gendev) { 3418 error = sysfs_create_link(&shost->shost_gendev.kobj, 3419 &dev->kobj, dev_name(dev)); 3420 if (error) 3421 printk(KERN_ERR 3422 "%s: Cannot create vport symlinks for " 3423 "%s, err=%d\n", 3424 __func__, dev_name(dev), error); 3425 } 3426 spin_lock_irqsave(shost->host_lock, flags); 3427 vport->flags &= ~FC_VPORT_CREATING; 3428 spin_unlock_irqrestore(shost->host_lock, flags); 3429 3430 dev_printk(KERN_NOTICE, pdev, 3431 "%s created via shost%d channel %d\n", dev_name(dev), 3432 shost->host_no, channel); 3433 3434 *ret_vport = vport; 3435 3436 return 0; 3437 3438 delete_vport_all: 3439 transport_remove_device(dev); 3440 device_del(dev); 3441 delete_vport: 3442 transport_destroy_device(dev); 3443 spin_lock_irqsave(shost->host_lock, flags); 3444 list_del(&vport->peers); 3445 scsi_host_put(shost); /* for fc_host->vport list */ 3446 fc_host->npiv_vports_inuse--; 3447 spin_unlock_irqrestore(shost->host_lock, flags); 3448 put_device(dev->parent); 3449 kfree(vport); 3450 3451 return error; 3452 } 3453 3454 /** 3455 * fc_vport_create - Admin App or LLDD requests creation of a vport 3456 * @shost: scsi host the virtual port is connected to. 3457 * @channel: channel on shost port connected to. 3458 * @ids: The world wide names, FC4 port roles, etc for 3459 * the virtual port. 3460 * 3461 * Notes: 3462 * This routine assumes no locks are held on entry. 3463 */ 3464 struct fc_vport * 3465 fc_vport_create(struct Scsi_Host *shost, int channel, 3466 struct fc_vport_identifiers *ids) 3467 { 3468 int stat; 3469 struct fc_vport *vport; 3470 3471 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3472 ids, &vport); 3473 return stat ? NULL : vport; 3474 } 3475 EXPORT_SYMBOL(fc_vport_create); 3476 3477 /** 3478 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3479 * @vport: fc_vport to be terminated 3480 * 3481 * Calls the LLDD vport_delete() function, then deallocates and removes 3482 * the vport from the shost and object tree. 3483 * 3484 * Notes: 3485 * This routine assumes no locks are held on entry. 3486 */ 3487 int 3488 fc_vport_terminate(struct fc_vport *vport) 3489 { 3490 struct Scsi_Host *shost = vport_to_shost(vport); 3491 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3492 struct fc_internal *i = to_fc_internal(shost->transportt); 3493 struct device *dev = &vport->dev; 3494 unsigned long flags; 3495 int stat; 3496 3497 if (i->f->vport_delete) 3498 stat = i->f->vport_delete(vport); 3499 else 3500 stat = -ENOENT; 3501 3502 spin_lock_irqsave(shost->host_lock, flags); 3503 vport->flags &= ~FC_VPORT_DELETING; 3504 if (!stat) { 3505 vport->flags |= FC_VPORT_DELETED; 3506 list_del(&vport->peers); 3507 fc_host->npiv_vports_inuse--; 3508 scsi_host_put(shost); /* for fc_host->vport list */ 3509 } 3510 spin_unlock_irqrestore(shost->host_lock, flags); 3511 3512 if (stat) 3513 return stat; 3514 3515 if (dev->parent != &shost->shost_gendev) 3516 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3517 transport_remove_device(dev); 3518 device_del(dev); 3519 transport_destroy_device(dev); 3520 3521 /* 3522 * Removing our self-reference should mean our 3523 * release function gets called, which will drop the remaining 3524 * parent reference and free the data structure. 3525 */ 3526 put_device(dev); /* for self-reference */ 3527 3528 return 0; /* SUCCESS */ 3529 } 3530 EXPORT_SYMBOL(fc_vport_terminate); 3531 3532 /** 3533 * fc_vport_sched_delete - workq-based delete request for a vport 3534 * @work: vport to be deleted. 3535 */ 3536 static void 3537 fc_vport_sched_delete(struct work_struct *work) 3538 { 3539 struct fc_vport *vport = 3540 container_of(work, struct fc_vport, vport_delete_work); 3541 int stat; 3542 3543 stat = fc_vport_terminate(vport); 3544 if (stat) 3545 dev_printk(KERN_ERR, vport->dev.parent, 3546 "%s: %s could not be deleted created via " 3547 "shost%d channel %d - error %d\n", __func__, 3548 dev_name(&vport->dev), vport->shost->host_no, 3549 vport->channel, stat); 3550 } 3551 3552 3553 /* 3554 * BSG support 3555 */ 3556 3557 3558 /** 3559 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job 3560 * @job: fc_bsg_job that is to be torn down 3561 */ 3562 static void 3563 fc_destroy_bsgjob(struct fc_bsg_job *job) 3564 { 3565 unsigned long flags; 3566 3567 spin_lock_irqsave(&job->job_lock, flags); 3568 if (job->ref_cnt) { 3569 spin_unlock_irqrestore(&job->job_lock, flags); 3570 return; 3571 } 3572 spin_unlock_irqrestore(&job->job_lock, flags); 3573 3574 put_device(job->dev); /* release reference for the request */ 3575 3576 kfree(job->request_payload.sg_list); 3577 kfree(job->reply_payload.sg_list); 3578 kfree(job); 3579 } 3580 3581 /** 3582 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has 3583 * completed 3584 * @job: fc_bsg_job that is complete 3585 */ 3586 static void 3587 fc_bsg_jobdone(struct fc_bsg_job *job) 3588 { 3589 struct request *req = job->req; 3590 struct request *rsp = req->next_rq; 3591 int err; 3592 3593 err = job->req->errors = job->reply->result; 3594 3595 if (err < 0) 3596 /* we're only returning the result field in the reply */ 3597 job->req->sense_len = sizeof(uint32_t); 3598 else 3599 job->req->sense_len = job->reply_len; 3600 3601 /* we assume all request payload was transferred, residual == 0 */ 3602 req->resid_len = 0; 3603 3604 if (rsp) { 3605 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); 3606 3607 /* set reply (bidi) residual */ 3608 rsp->resid_len -= min(job->reply->reply_payload_rcv_len, 3609 rsp->resid_len); 3610 } 3611 blk_complete_request(req); 3612 } 3613 3614 /** 3615 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests 3616 * @rq: BSG request that holds the job to be destroyed 3617 */ 3618 static void fc_bsg_softirq_done(struct request *rq) 3619 { 3620 struct fc_bsg_job *job = rq->special; 3621 unsigned long flags; 3622 3623 spin_lock_irqsave(&job->job_lock, flags); 3624 job->state_flags |= FC_RQST_STATE_DONE; 3625 job->ref_cnt--; 3626 spin_unlock_irqrestore(&job->job_lock, flags); 3627 3628 blk_end_request_all(rq, rq->errors); 3629 fc_destroy_bsgjob(job); 3630 } 3631 3632 /** 3633 * fc_bsg_job_timeout - handler for when a bsg request timesout 3634 * @req: request that timed out 3635 */ 3636 static enum blk_eh_timer_return 3637 fc_bsg_job_timeout(struct request *req) 3638 { 3639 struct fc_bsg_job *job = (void *) req->special; 3640 struct Scsi_Host *shost = job->shost; 3641 struct fc_internal *i = to_fc_internal(shost->transportt); 3642 unsigned long flags; 3643 int err = 0, done = 0; 3644 3645 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) 3646 return BLK_EH_RESET_TIMER; 3647 3648 spin_lock_irqsave(&job->job_lock, flags); 3649 if (job->state_flags & FC_RQST_STATE_DONE) 3650 done = 1; 3651 else 3652 job->ref_cnt++; 3653 spin_unlock_irqrestore(&job->job_lock, flags); 3654 3655 if (!done && i->f->bsg_timeout) { 3656 /* call LLDD to abort the i/o as it has timed out */ 3657 err = i->f->bsg_timeout(job); 3658 if (err == -EAGAIN) { 3659 job->ref_cnt--; 3660 return BLK_EH_RESET_TIMER; 3661 } else if (err) 3662 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3663 "abort failed with status %d\n", err); 3664 } 3665 3666 /* the blk_end_sync_io() doesn't check the error */ 3667 if (done) 3668 return BLK_EH_NOT_HANDLED; 3669 else 3670 return BLK_EH_HANDLED; 3671 } 3672 3673 static int 3674 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) 3675 { 3676 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); 3677 3678 BUG_ON(!req->nr_phys_segments); 3679 3680 buf->sg_list = kzalloc(sz, GFP_KERNEL); 3681 if (!buf->sg_list) 3682 return -ENOMEM; 3683 sg_init_table(buf->sg_list, req->nr_phys_segments); 3684 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); 3685 buf->payload_len = blk_rq_bytes(req); 3686 return 0; 3687 } 3688 3689 3690 /** 3691 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the 3692 * bsg request 3693 * @shost: SCSI Host corresponding to the bsg object 3694 * @rport: (optional) FC Remote Port corresponding to the bsg object 3695 * @req: BSG request that needs a job structure 3696 */ 3697 static int 3698 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, 3699 struct request *req) 3700 { 3701 struct fc_internal *i = to_fc_internal(shost->transportt); 3702 struct request *rsp = req->next_rq; 3703 struct fc_bsg_job *job; 3704 int ret; 3705 3706 BUG_ON(req->special); 3707 3708 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, 3709 GFP_KERNEL); 3710 if (!job) 3711 return -ENOMEM; 3712 3713 /* 3714 * Note: this is a bit silly. 3715 * The request gets formatted as a SGIO v4 ioctl request, which 3716 * then gets reformatted as a blk request, which then gets 3717 * reformatted as a fc bsg request. And on completion, we have 3718 * to wrap return results such that SGIO v4 thinks it was a scsi 3719 * status. I hope this was all worth it. 3720 */ 3721 3722 req->special = job; 3723 job->shost = shost; 3724 job->rport = rport; 3725 job->req = req; 3726 if (i->f->dd_bsg_size) 3727 job->dd_data = (void *)&job[1]; 3728 spin_lock_init(&job->job_lock); 3729 job->request = (struct fc_bsg_request *)req->cmd; 3730 job->request_len = req->cmd_len; 3731 job->reply = req->sense; 3732 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer 3733 * allocated */ 3734 if (req->bio) { 3735 ret = fc_bsg_map_buffer(&job->request_payload, req); 3736 if (ret) 3737 goto failjob_rls_job; 3738 } 3739 if (rsp && rsp->bio) { 3740 ret = fc_bsg_map_buffer(&job->reply_payload, rsp); 3741 if (ret) 3742 goto failjob_rls_rqst_payload; 3743 } 3744 job->job_done = fc_bsg_jobdone; 3745 if (rport) 3746 job->dev = &rport->dev; 3747 else 3748 job->dev = &shost->shost_gendev; 3749 get_device(job->dev); /* take a reference for the request */ 3750 3751 job->ref_cnt = 1; 3752 3753 return 0; 3754 3755 3756 failjob_rls_rqst_payload: 3757 kfree(job->request_payload.sg_list); 3758 failjob_rls_job: 3759 kfree(job); 3760 return -ENOMEM; 3761 } 3762 3763 3764 enum fc_dispatch_result { 3765 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ 3766 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ 3767 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ 3768 }; 3769 3770 3771 /** 3772 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3773 * @q: fc host request queue 3774 * @shost: scsi host rport attached to 3775 * @job: bsg job to be processed 3776 */ 3777 static enum fc_dispatch_result 3778 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3779 struct fc_bsg_job *job) 3780 { 3781 struct fc_internal *i = to_fc_internal(shost->transportt); 3782 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3783 int ret; 3784 3785 /* Validate the host command */ 3786 switch (job->request->msgcode) { 3787 case FC_BSG_HST_ADD_RPORT: 3788 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3789 break; 3790 3791 case FC_BSG_HST_DEL_RPORT: 3792 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3793 break; 3794 3795 case FC_BSG_HST_ELS_NOLOGIN: 3796 cmdlen += sizeof(struct fc_bsg_host_els); 3797 /* there better be a xmt and rcv payloads */ 3798 if ((!job->request_payload.payload_len) || 3799 (!job->reply_payload.payload_len)) { 3800 ret = -EINVAL; 3801 goto fail_host_msg; 3802 } 3803 break; 3804 3805 case FC_BSG_HST_CT: 3806 cmdlen += sizeof(struct fc_bsg_host_ct); 3807 /* there better be xmt and rcv payloads */ 3808 if ((!job->request_payload.payload_len) || 3809 (!job->reply_payload.payload_len)) { 3810 ret = -EINVAL; 3811 goto fail_host_msg; 3812 } 3813 break; 3814 3815 case FC_BSG_HST_VENDOR: 3816 cmdlen += sizeof(struct fc_bsg_host_vendor); 3817 if ((shost->hostt->vendor_id == 0L) || 3818 (job->request->rqst_data.h_vendor.vendor_id != 3819 shost->hostt->vendor_id)) { 3820 ret = -ESRCH; 3821 goto fail_host_msg; 3822 } 3823 break; 3824 3825 default: 3826 ret = -EBADR; 3827 goto fail_host_msg; 3828 } 3829 3830 /* check if we really have all the request data needed */ 3831 if (job->request_len < cmdlen) { 3832 ret = -ENOMSG; 3833 goto fail_host_msg; 3834 } 3835 3836 ret = i->f->bsg_request(job); 3837 if (!ret) 3838 return FC_DISPATCH_UNLOCKED; 3839 3840 fail_host_msg: 3841 /* return the errno failure code as the only status */ 3842 BUG_ON(job->reply_len < sizeof(uint32_t)); 3843 job->reply->reply_payload_rcv_len = 0; 3844 job->reply->result = ret; 3845 job->reply_len = sizeof(uint32_t); 3846 fc_bsg_jobdone(job); 3847 return FC_DISPATCH_UNLOCKED; 3848 } 3849 3850 3851 /* 3852 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3853 * @rport: rport to be restarted 3854 */ 3855 static void 3856 fc_bsg_goose_queue(struct fc_rport *rport) 3857 { 3858 if (!rport->rqst_q) 3859 return; 3860 3861 /* 3862 * This get/put dance makes no sense 3863 */ 3864 get_device(&rport->dev); 3865 blk_run_queue_async(rport->rqst_q); 3866 put_device(&rport->dev); 3867 } 3868 3869 /** 3870 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3871 * @q: rport request queue 3872 * @shost: scsi host rport attached to 3873 * @rport: rport request destined to 3874 * @job: bsg job to be processed 3875 */ 3876 static enum fc_dispatch_result 3877 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3878 struct fc_rport *rport, struct fc_bsg_job *job) 3879 { 3880 struct fc_internal *i = to_fc_internal(shost->transportt); 3881 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3882 int ret; 3883 3884 /* Validate the rport command */ 3885 switch (job->request->msgcode) { 3886 case FC_BSG_RPT_ELS: 3887 cmdlen += sizeof(struct fc_bsg_rport_els); 3888 goto check_bidi; 3889 3890 case FC_BSG_RPT_CT: 3891 cmdlen += sizeof(struct fc_bsg_rport_ct); 3892 check_bidi: 3893 /* there better be xmt and rcv payloads */ 3894 if ((!job->request_payload.payload_len) || 3895 (!job->reply_payload.payload_len)) { 3896 ret = -EINVAL; 3897 goto fail_rport_msg; 3898 } 3899 break; 3900 default: 3901 ret = -EBADR; 3902 goto fail_rport_msg; 3903 } 3904 3905 /* check if we really have all the request data needed */ 3906 if (job->request_len < cmdlen) { 3907 ret = -ENOMSG; 3908 goto fail_rport_msg; 3909 } 3910 3911 ret = i->f->bsg_request(job); 3912 if (!ret) 3913 return FC_DISPATCH_UNLOCKED; 3914 3915 fail_rport_msg: 3916 /* return the errno failure code as the only status */ 3917 BUG_ON(job->reply_len < sizeof(uint32_t)); 3918 job->reply->reply_payload_rcv_len = 0; 3919 job->reply->result = ret; 3920 job->reply_len = sizeof(uint32_t); 3921 fc_bsg_jobdone(job); 3922 return FC_DISPATCH_UNLOCKED; 3923 } 3924 3925 3926 /** 3927 * fc_bsg_request_handler - generic handler for bsg requests 3928 * @q: request queue to manage 3929 * @shost: Scsi_Host related to the bsg object 3930 * @rport: FC remote port related to the bsg object (optional) 3931 * @dev: device structure for bsg object 3932 */ 3933 static void 3934 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, 3935 struct fc_rport *rport, struct device *dev) 3936 { 3937 struct request *req; 3938 struct fc_bsg_job *job; 3939 enum fc_dispatch_result ret; 3940 3941 if (!get_device(dev)) 3942 return; 3943 3944 while (1) { 3945 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && 3946 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3947 break; 3948 3949 req = blk_fetch_request(q); 3950 if (!req) 3951 break; 3952 3953 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { 3954 req->errors = -ENXIO; 3955 spin_unlock_irq(q->queue_lock); 3956 blk_end_request_all(req, -ENXIO); 3957 spin_lock_irq(q->queue_lock); 3958 continue; 3959 } 3960 3961 spin_unlock_irq(q->queue_lock); 3962 3963 ret = fc_req_to_bsgjob(shost, rport, req); 3964 if (ret) { 3965 req->errors = ret; 3966 blk_end_request_all(req, ret); 3967 spin_lock_irq(q->queue_lock); 3968 continue; 3969 } 3970 3971 job = req->special; 3972 3973 /* check if we have the msgcode value at least */ 3974 if (job->request_len < sizeof(uint32_t)) { 3975 BUG_ON(job->reply_len < sizeof(uint32_t)); 3976 job->reply->reply_payload_rcv_len = 0; 3977 job->reply->result = -ENOMSG; 3978 job->reply_len = sizeof(uint32_t); 3979 fc_bsg_jobdone(job); 3980 spin_lock_irq(q->queue_lock); 3981 continue; 3982 } 3983 3984 /* the dispatch routines will unlock the queue_lock */ 3985 if (rport) 3986 ret = fc_bsg_rport_dispatch(q, shost, rport, job); 3987 else 3988 ret = fc_bsg_host_dispatch(q, shost, job); 3989 3990 /* did dispatcher hit state that can't process any more */ 3991 if (ret == FC_DISPATCH_BREAK) 3992 break; 3993 3994 /* did dispatcher had released the lock */ 3995 if (ret == FC_DISPATCH_UNLOCKED) 3996 spin_lock_irq(q->queue_lock); 3997 } 3998 3999 spin_unlock_irq(q->queue_lock); 4000 put_device(dev); 4001 spin_lock_irq(q->queue_lock); 4002 } 4003 4004 4005 /** 4006 * fc_bsg_host_handler - handler for bsg requests for a fc host 4007 * @q: fc host request queue 4008 */ 4009 static void 4010 fc_bsg_host_handler(struct request_queue *q) 4011 { 4012 struct Scsi_Host *shost = q->queuedata; 4013 4014 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); 4015 } 4016 4017 4018 /** 4019 * fc_bsg_rport_handler - handler for bsg requests for a fc rport 4020 * @q: rport request queue 4021 */ 4022 static void 4023 fc_bsg_rport_handler(struct request_queue *q) 4024 { 4025 struct fc_rport *rport = q->queuedata; 4026 struct Scsi_Host *shost = rport_to_shost(rport); 4027 4028 fc_bsg_request_handler(q, shost, rport, &rport->dev); 4029 } 4030 4031 4032 /** 4033 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4034 * @shost: shost for fc_host 4035 * @fc_host: fc_host adding the structures to 4036 */ 4037 static int 4038 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4039 { 4040 struct device *dev = &shost->shost_gendev; 4041 struct fc_internal *i = to_fc_internal(shost->transportt); 4042 struct request_queue *q; 4043 int err; 4044 char bsg_name[20]; 4045 4046 fc_host->rqst_q = NULL; 4047 4048 if (!i->f->bsg_request) 4049 return -ENOTSUPP; 4050 4051 snprintf(bsg_name, sizeof(bsg_name), 4052 "fc_host%d", shost->host_no); 4053 4054 q = __scsi_alloc_queue(shost, fc_bsg_host_handler); 4055 if (!q) { 4056 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4057 "initialize - no request queue\n", 4058 shost->host_no); 4059 return -ENOMEM; 4060 } 4061 4062 q->queuedata = shost; 4063 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4064 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4065 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4066 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4067 4068 err = bsg_register_queue(q, dev, bsg_name, NULL); 4069 if (err) { 4070 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4071 "initialize - register queue\n", 4072 shost->host_no); 4073 blk_cleanup_queue(q); 4074 return err; 4075 } 4076 4077 fc_host->rqst_q = q; 4078 return 0; 4079 } 4080 4081 4082 /** 4083 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4084 * @shost: shost that rport is attached to 4085 * @rport: rport that the bsg hooks are being attached to 4086 */ 4087 static int 4088 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4089 { 4090 struct device *dev = &rport->dev; 4091 struct fc_internal *i = to_fc_internal(shost->transportt); 4092 struct request_queue *q; 4093 int err; 4094 4095 rport->rqst_q = NULL; 4096 4097 if (!i->f->bsg_request) 4098 return -ENOTSUPP; 4099 4100 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); 4101 if (!q) { 4102 printk(KERN_ERR "%s: bsg interface failed to " 4103 "initialize - no request queue\n", 4104 dev->kobj.name); 4105 return -ENOMEM; 4106 } 4107 4108 q->queuedata = rport; 4109 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4110 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4111 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4112 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4113 4114 err = bsg_register_queue(q, dev, NULL, NULL); 4115 if (err) { 4116 printk(KERN_ERR "%s: bsg interface failed to " 4117 "initialize - register queue\n", 4118 dev->kobj.name); 4119 blk_cleanup_queue(q); 4120 return err; 4121 } 4122 4123 rport->rqst_q = q; 4124 return 0; 4125 } 4126 4127 4128 /** 4129 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4130 * @q: the request_queue that is to be torn down. 4131 * 4132 * Notes: 4133 * Before unregistering the queue empty any requests that are blocked 4134 * 4135 * 4136 */ 4137 static void 4138 fc_bsg_remove(struct request_queue *q) 4139 { 4140 if (q) { 4141 bsg_unregister_queue(q); 4142 blk_cleanup_queue(q); 4143 } 4144 } 4145 4146 4147 /* Original Author: Martin Hicks */ 4148 MODULE_AUTHOR("James Smart"); 4149 MODULE_DESCRIPTION("FC Transport Attributes"); 4150 MODULE_LICENSE("GPL"); 4151 4152 module_init(fc_transport_init); 4153 module_exit(fc_transport_exit); 4154