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 #include "scsi_transport_fc_internal.h" 43 44 static int fc_queue_work(struct Scsi_Host *, struct work_struct *); 45 static void fc_vport_sched_delete(struct work_struct *work); 46 static int fc_vport_setup(struct Scsi_Host *shost, int channel, 47 struct device *pdev, struct fc_vport_identifiers *ids, 48 struct fc_vport **vport); 49 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); 50 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); 51 static void fc_bsg_remove(struct request_queue *); 52 static void fc_bsg_goose_queue(struct fc_rport *); 53 54 /* 55 * Module Parameters 56 */ 57 58 /* 59 * dev_loss_tmo: the default number of seconds that the FC transport 60 * should insulate the loss of a remote port. 61 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 62 */ 63 static unsigned int fc_dev_loss_tmo = 60; /* seconds */ 64 65 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); 66 MODULE_PARM_DESC(dev_loss_tmo, 67 "Maximum number of seconds that the FC transport should" 68 " insulate the loss of a remote port. Once this value is" 69 " exceeded, the scsi target is removed. Value should be" 70 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" 71 " fast_io_fail_tmo is not set."); 72 73 /* 74 * Redefine so that we can have same named attributes in the 75 * sdev/starget/host objects. 76 */ 77 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 78 struct device_attribute device_attr_##_prefix##_##_name = \ 79 __ATTR(_name,_mode,_show,_store) 80 81 #define fc_enum_name_search(title, table_type, table) \ 82 static const char *get_fc_##title##_name(enum table_type table_key) \ 83 { \ 84 int i; \ 85 char *name = NULL; \ 86 \ 87 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 88 if (table[i].value == table_key) { \ 89 name = table[i].name; \ 90 break; \ 91 } \ 92 } \ 93 return name; \ 94 } 95 96 #define fc_enum_name_match(title, table_type, table) \ 97 static int get_fc_##title##_match(const char *table_key, \ 98 enum table_type *value) \ 99 { \ 100 int i; \ 101 \ 102 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 103 if (strncmp(table_key, table[i].name, \ 104 table[i].matchlen) == 0) { \ 105 *value = table[i].value; \ 106 return 0; /* success */ \ 107 } \ 108 } \ 109 return 1; /* failure */ \ 110 } 111 112 113 /* Convert fc_port_type values to ascii string name */ 114 static struct { 115 enum fc_port_type value; 116 char *name; 117 } fc_port_type_names[] = { 118 { FC_PORTTYPE_UNKNOWN, "Unknown" }, 119 { FC_PORTTYPE_OTHER, "Other" }, 120 { FC_PORTTYPE_NOTPRESENT, "Not Present" }, 121 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, 122 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, 123 { FC_PORTTYPE_LPORT, "LPort (private loop)" }, 124 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, 125 { FC_PORTTYPE_NPIV, "NPIV VPORT" }, 126 }; 127 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) 128 #define FC_PORTTYPE_MAX_NAMELEN 50 129 130 /* Reuse fc_port_type enum function for vport_type */ 131 #define get_fc_vport_type_name get_fc_port_type_name 132 133 134 /* Convert fc_host_event_code values to ascii string name */ 135 static const struct { 136 enum fc_host_event_code value; 137 char *name; 138 } fc_host_event_code_names[] = { 139 { FCH_EVT_LIP, "lip" }, 140 { FCH_EVT_LINKUP, "link_up" }, 141 { FCH_EVT_LINKDOWN, "link_down" }, 142 { FCH_EVT_LIPRESET, "lip_reset" }, 143 { FCH_EVT_RSCN, "rscn" }, 144 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, 145 { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, 146 { FCH_EVT_PORT_ONLINE, "port_online" }, 147 { FCH_EVT_PORT_OFFLINE, "port_offline" }, 148 { FCH_EVT_PORT_FABRIC, "port_fabric" }, 149 { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, 150 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 151 }; 152 fc_enum_name_search(host_event_code, fc_host_event_code, 153 fc_host_event_code_names) 154 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 155 156 157 /* Convert fc_port_state values to ascii string name */ 158 static struct { 159 enum fc_port_state value; 160 char *name; 161 } fc_port_state_names[] = { 162 { FC_PORTSTATE_UNKNOWN, "Unknown" }, 163 { FC_PORTSTATE_NOTPRESENT, "Not Present" }, 164 { FC_PORTSTATE_ONLINE, "Online" }, 165 { FC_PORTSTATE_OFFLINE, "Offline" }, 166 { FC_PORTSTATE_BLOCKED, "Blocked" }, 167 { FC_PORTSTATE_BYPASSED, "Bypassed" }, 168 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, 169 { FC_PORTSTATE_LINKDOWN, "Linkdown" }, 170 { FC_PORTSTATE_ERROR, "Error" }, 171 { FC_PORTSTATE_LOOPBACK, "Loopback" }, 172 { FC_PORTSTATE_DELETED, "Deleted" }, 173 }; 174 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 175 #define FC_PORTSTATE_MAX_NAMELEN 20 176 177 178 /* Convert fc_vport_state values to ascii string name */ 179 static struct { 180 enum fc_vport_state value; 181 char *name; 182 } fc_vport_state_names[] = { 183 { FC_VPORT_UNKNOWN, "Unknown" }, 184 { FC_VPORT_ACTIVE, "Active" }, 185 { FC_VPORT_DISABLED, "Disabled" }, 186 { FC_VPORT_LINKDOWN, "Linkdown" }, 187 { FC_VPORT_INITIALIZING, "Initializing" }, 188 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 189 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 190 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 191 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 192 { FC_VPORT_FAILED, "VPort Failed" }, 193 }; 194 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 195 #define FC_VPORTSTATE_MAX_NAMELEN 24 196 197 /* Reuse fc_vport_state enum function for vport_last_state */ 198 #define get_fc_vport_last_state_name get_fc_vport_state_name 199 200 201 /* Convert fc_tgtid_binding_type values to ascii string name */ 202 static const struct { 203 enum fc_tgtid_binding_type value; 204 char *name; 205 int matchlen; 206 } fc_tgtid_binding_type_names[] = { 207 { FC_TGTID_BIND_NONE, "none", 4 }, 208 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 209 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 210 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 211 }; 212 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 213 fc_tgtid_binding_type_names) 214 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 215 fc_tgtid_binding_type_names) 216 #define FC_BINDTYPE_MAX_NAMELEN 30 217 218 219 #define fc_bitfield_name_search(title, table) \ 220 static ssize_t \ 221 get_fc_##title##_names(u32 table_key, char *buf) \ 222 { \ 223 char *prefix = ""; \ 224 ssize_t len = 0; \ 225 int i; \ 226 \ 227 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 228 if (table[i].value & table_key) { \ 229 len += sprintf(buf + len, "%s%s", \ 230 prefix, table[i].name); \ 231 prefix = ", "; \ 232 } \ 233 } \ 234 len += sprintf(buf + len, "\n"); \ 235 return len; \ 236 } 237 238 239 /* Convert FC_COS bit values to ascii string name */ 240 static const struct { 241 u32 value; 242 char *name; 243 } fc_cos_names[] = { 244 { FC_COS_CLASS1, "Class 1" }, 245 { FC_COS_CLASS2, "Class 2" }, 246 { FC_COS_CLASS3, "Class 3" }, 247 { FC_COS_CLASS4, "Class 4" }, 248 { FC_COS_CLASS6, "Class 6" }, 249 }; 250 fc_bitfield_name_search(cos, fc_cos_names) 251 252 253 /* Convert FC_PORTSPEED bit values to ascii string name */ 254 static const struct { 255 u32 value; 256 char *name; 257 } fc_port_speed_names[] = { 258 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 259 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 260 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 261 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 262 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 263 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 264 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 265 }; 266 fc_bitfield_name_search(port_speed, fc_port_speed_names) 267 268 269 static int 270 show_fc_fc4s (char *buf, u8 *fc4_list) 271 { 272 int i, len=0; 273 274 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 275 len += sprintf(buf + len , "0x%02x ", *fc4_list); 276 len += sprintf(buf + len, "\n"); 277 return len; 278 } 279 280 281 /* Convert FC_PORT_ROLE bit values to ascii string name */ 282 static const struct { 283 u32 value; 284 char *name; 285 } fc_port_role_names[] = { 286 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 287 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 288 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 289 }; 290 fc_bitfield_name_search(port_roles, fc_port_role_names) 291 292 /* 293 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 294 */ 295 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 296 #define FC_WELLKNOWN_ROLE_MASK 0x00000f 297 #define FC_FPORT_PORTID 0x00000e 298 #define FC_FABCTLR_PORTID 0x00000d 299 #define FC_DIRSRVR_PORTID 0x00000c 300 #define FC_TIMESRVR_PORTID 0x00000b 301 #define FC_MGMTSRVR_PORTID 0x00000a 302 303 304 static void fc_timeout_deleted_rport(struct work_struct *work); 305 static void fc_timeout_fail_rport_io(struct work_struct *work); 306 static void fc_scsi_scan_rport(struct work_struct *work); 307 308 /* 309 * Attribute counts pre object type... 310 * Increase these values if you add attributes 311 */ 312 #define FC_STARGET_NUM_ATTRS 3 313 #define FC_RPORT_NUM_ATTRS 10 314 #define FC_VPORT_NUM_ATTRS 9 315 #define FC_HOST_NUM_ATTRS 29 316 317 struct fc_internal { 318 struct scsi_transport_template t; 319 struct fc_function_template *f; 320 321 /* 322 * For attributes : each object has : 323 * An array of the actual attributes structures 324 * An array of null-terminated pointers to the attribute 325 * structures - used for mid-layer interaction. 326 * 327 * The attribute containers for the starget and host are are 328 * part of the midlayer. As the remote port is specific to the 329 * fc transport, we must provide the attribute container. 330 */ 331 struct device_attribute private_starget_attrs[ 332 FC_STARGET_NUM_ATTRS]; 333 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 334 335 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 336 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 337 338 struct transport_container rport_attr_cont; 339 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 340 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 341 342 struct transport_container vport_attr_cont; 343 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 344 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 345 }; 346 347 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 348 349 static int fc_target_setup(struct transport_container *tc, struct device *dev, 350 struct device *cdev) 351 { 352 struct scsi_target *starget = to_scsi_target(dev); 353 struct fc_rport *rport = starget_to_rport(starget); 354 355 /* 356 * if parent is remote port, use values from remote port. 357 * Otherwise, this host uses the fc_transport, but not the 358 * remote port interface. As such, initialize to known non-values. 359 */ 360 if (rport) { 361 fc_starget_node_name(starget) = rport->node_name; 362 fc_starget_port_name(starget) = rport->port_name; 363 fc_starget_port_id(starget) = rport->port_id; 364 } else { 365 fc_starget_node_name(starget) = -1; 366 fc_starget_port_name(starget) = -1; 367 fc_starget_port_id(starget) = -1; 368 } 369 370 return 0; 371 } 372 373 static DECLARE_TRANSPORT_CLASS(fc_transport_class, 374 "fc_transport", 375 fc_target_setup, 376 NULL, 377 NULL); 378 379 static int fc_host_setup(struct transport_container *tc, struct device *dev, 380 struct device *cdev) 381 { 382 struct Scsi_Host *shost = dev_to_shost(dev); 383 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 384 385 /* 386 * Set default values easily detected by the midlayer as 387 * failure cases. The scsi lldd is responsible for initializing 388 * all transport attributes to valid values per host. 389 */ 390 fc_host->node_name = -1; 391 fc_host->port_name = -1; 392 fc_host->permanent_port_name = -1; 393 fc_host->supported_classes = FC_COS_UNSPECIFIED; 394 memset(fc_host->supported_fc4s, 0, 395 sizeof(fc_host->supported_fc4s)); 396 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 397 fc_host->maxframe_size = -1; 398 fc_host->max_npiv_vports = 0; 399 memset(fc_host->serial_number, 0, 400 sizeof(fc_host->serial_number)); 401 memset(fc_host->manufacturer, 0, 402 sizeof(fc_host->manufacturer)); 403 memset(fc_host->model, 0, 404 sizeof(fc_host->model)); 405 memset(fc_host->model_description, 0, 406 sizeof(fc_host->model_description)); 407 memset(fc_host->hardware_version, 0, 408 sizeof(fc_host->hardware_version)); 409 memset(fc_host->driver_version, 0, 410 sizeof(fc_host->driver_version)); 411 memset(fc_host->firmware_version, 0, 412 sizeof(fc_host->firmware_version)); 413 memset(fc_host->optionrom_version, 0, 414 sizeof(fc_host->optionrom_version)); 415 416 fc_host->port_id = -1; 417 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 418 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 419 memset(fc_host->active_fc4s, 0, 420 sizeof(fc_host->active_fc4s)); 421 fc_host->speed = FC_PORTSPEED_UNKNOWN; 422 fc_host->fabric_name = -1; 423 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 424 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 425 426 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 427 428 INIT_LIST_HEAD(&fc_host->rports); 429 INIT_LIST_HEAD(&fc_host->rport_bindings); 430 INIT_LIST_HEAD(&fc_host->vports); 431 fc_host->next_rport_number = 0; 432 fc_host->next_target_id = 0; 433 fc_host->next_vport_number = 0; 434 fc_host->npiv_vports_inuse = 0; 435 436 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 437 "fc_wq_%d", shost->host_no); 438 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); 439 if (!fc_host->work_q) 440 return -ENOMEM; 441 442 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 443 snprintf(fc_host->devloss_work_q_name, 444 sizeof(fc_host->devloss_work_q_name), 445 "fc_dl_%d", shost->host_no); 446 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, 447 fc_host->devloss_work_q_name); 448 if (!fc_host->devloss_work_q) { 449 destroy_workqueue(fc_host->work_q); 450 fc_host->work_q = NULL; 451 return -ENOMEM; 452 } 453 454 fc_bsg_hostadd(shost, fc_host); 455 /* ignore any bsg add error - we just can't do sgio */ 456 457 return 0; 458 } 459 460 static int fc_host_remove(struct transport_container *tc, struct device *dev, 461 struct device *cdev) 462 { 463 struct Scsi_Host *shost = dev_to_shost(dev); 464 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 465 466 fc_bsg_remove(fc_host->rqst_q); 467 return 0; 468 } 469 470 static DECLARE_TRANSPORT_CLASS(fc_host_class, 471 "fc_host", 472 fc_host_setup, 473 fc_host_remove, 474 NULL); 475 476 /* 477 * Setup and Remove actions for remote ports are handled 478 * in the service functions below. 479 */ 480 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 481 "fc_remote_ports", 482 NULL, 483 NULL, 484 NULL); 485 486 /* 487 * Setup and Remove actions for virtual ports are handled 488 * in the service functions below. 489 */ 490 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 491 "fc_vports", 492 NULL, 493 NULL, 494 NULL); 495 496 /* 497 * Netlink Infrastructure 498 */ 499 500 static atomic_t fc_event_seq; 501 502 /** 503 * fc_get_event_number - Obtain the next sequential FC event number 504 * 505 * Notes: 506 * We could have inlined this, but it would have required fc_event_seq to 507 * be exposed. For now, live with the subroutine call. 508 * Atomic used to avoid lock/unlock... 509 */ 510 u32 511 fc_get_event_number(void) 512 { 513 return atomic_add_return(1, &fc_event_seq); 514 } 515 EXPORT_SYMBOL(fc_get_event_number); 516 517 518 /** 519 * fc_host_post_event - called to post an even on an fc_host. 520 * @shost: host the event occurred on 521 * @event_number: fc event number obtained from get_fc_event_number() 522 * @event_code: fc_host event being posted 523 * @event_data: 32bits of data for the event being posted 524 * 525 * Notes: 526 * This routine assumes no locks are held on entry. 527 */ 528 void 529 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 530 enum fc_host_event_code event_code, u32 event_data) 531 { 532 struct sk_buff *skb; 533 struct nlmsghdr *nlh; 534 struct fc_nl_event *event; 535 const char *name; 536 u32 len; 537 int err; 538 539 if (!scsi_nl_sock) { 540 err = -ENOENT; 541 goto send_fail; 542 } 543 544 len = FC_NL_MSGALIGN(sizeof(*event)); 545 546 skb = nlmsg_new(len, GFP_KERNEL); 547 if (!skb) { 548 err = -ENOBUFS; 549 goto send_fail; 550 } 551 552 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 553 if (!nlh) { 554 err = -ENOBUFS; 555 goto send_fail_skb; 556 } 557 event = nlmsg_data(nlh); 558 559 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 560 FC_NL_ASYNC_EVENT, len); 561 event->seconds = get_seconds(); 562 event->vendor_id = 0; 563 event->host_no = shost->host_no; 564 event->event_datalen = sizeof(u32); /* bytes */ 565 event->event_num = event_number; 566 event->event_code = event_code; 567 event->event_data = event_data; 568 569 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 570 GFP_KERNEL); 571 return; 572 573 send_fail_skb: 574 kfree_skb(skb); 575 send_fail: 576 name = get_fc_host_event_code_name(event_code); 577 printk(KERN_WARNING 578 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 579 __func__, shost->host_no, 580 (name) ? name : "<unknown>", event_data, err); 581 return; 582 } 583 EXPORT_SYMBOL(fc_host_post_event); 584 585 586 /** 587 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host 588 * @shost: host the event occurred on 589 * @event_number: fc event number obtained from get_fc_event_number() 590 * @data_len: amount, in bytes, of vendor unique data 591 * @data_buf: pointer to vendor unique data 592 * @vendor_id: Vendor id 593 * 594 * Notes: 595 * This routine assumes no locks are held on entry. 596 */ 597 void 598 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 599 u32 data_len, char * data_buf, u64 vendor_id) 600 { 601 struct sk_buff *skb; 602 struct nlmsghdr *nlh; 603 struct fc_nl_event *event; 604 u32 len; 605 int err; 606 607 if (!scsi_nl_sock) { 608 err = -ENOENT; 609 goto send_vendor_fail; 610 } 611 612 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 613 614 skb = nlmsg_new(len, GFP_KERNEL); 615 if (!skb) { 616 err = -ENOBUFS; 617 goto send_vendor_fail; 618 } 619 620 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 621 if (!nlh) { 622 err = -ENOBUFS; 623 goto send_vendor_fail_skb; 624 } 625 event = nlmsg_data(nlh); 626 627 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 628 FC_NL_ASYNC_EVENT, len); 629 event->seconds = get_seconds(); 630 event->vendor_id = vendor_id; 631 event->host_no = shost->host_no; 632 event->event_datalen = data_len; /* bytes */ 633 event->event_num = event_number; 634 event->event_code = FCH_EVT_VENDOR_UNIQUE; 635 memcpy(&event->event_data, data_buf, data_len); 636 637 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 638 GFP_KERNEL); 639 return; 640 641 send_vendor_fail_skb: 642 kfree_skb(skb); 643 send_vendor_fail: 644 printk(KERN_WARNING 645 "%s: Dropped Event : host %d vendor_unique - err %d\n", 646 __func__, shost->host_no, err); 647 return; 648 } 649 EXPORT_SYMBOL(fc_host_post_vendor_event); 650 651 652 653 static __init int fc_transport_init(void) 654 { 655 int error; 656 657 atomic_set(&fc_event_seq, 0); 658 659 error = transport_class_register(&fc_host_class); 660 if (error) 661 return error; 662 error = transport_class_register(&fc_vport_class); 663 if (error) 664 goto unreg_host_class; 665 error = transport_class_register(&fc_rport_class); 666 if (error) 667 goto unreg_vport_class; 668 error = transport_class_register(&fc_transport_class); 669 if (error) 670 goto unreg_rport_class; 671 return 0; 672 673 unreg_rport_class: 674 transport_class_unregister(&fc_rport_class); 675 unreg_vport_class: 676 transport_class_unregister(&fc_vport_class); 677 unreg_host_class: 678 transport_class_unregister(&fc_host_class); 679 return error; 680 } 681 682 static void __exit fc_transport_exit(void) 683 { 684 transport_class_unregister(&fc_transport_class); 685 transport_class_unregister(&fc_rport_class); 686 transport_class_unregister(&fc_host_class); 687 transport_class_unregister(&fc_vport_class); 688 } 689 690 /* 691 * FC Remote Port Attribute Management 692 */ 693 694 #define fc_rport_show_function(field, format_string, sz, cast) \ 695 static ssize_t \ 696 show_fc_rport_##field (struct device *dev, \ 697 struct device_attribute *attr, char *buf) \ 698 { \ 699 struct fc_rport *rport = transport_class_to_rport(dev); \ 700 struct Scsi_Host *shost = rport_to_shost(rport); \ 701 struct fc_internal *i = to_fc_internal(shost->transportt); \ 702 if ((i->f->get_rport_##field) && \ 703 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 704 (rport->port_state == FC_PORTSTATE_DELETED) || \ 705 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 706 i->f->get_rport_##field(rport); \ 707 return snprintf(buf, sz, format_string, cast rport->field); \ 708 } 709 710 #define fc_rport_store_function(field) \ 711 static ssize_t \ 712 store_fc_rport_##field(struct device *dev, \ 713 struct device_attribute *attr, \ 714 const char *buf, size_t count) \ 715 { \ 716 int val; \ 717 struct fc_rport *rport = transport_class_to_rport(dev); \ 718 struct Scsi_Host *shost = rport_to_shost(rport); \ 719 struct fc_internal *i = to_fc_internal(shost->transportt); \ 720 char *cp; \ 721 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 722 (rport->port_state == FC_PORTSTATE_DELETED) || \ 723 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 724 return -EBUSY; \ 725 val = simple_strtoul(buf, &cp, 0); \ 726 if (*cp && (*cp != '\n')) \ 727 return -EINVAL; \ 728 i->f->set_rport_##field(rport, val); \ 729 return count; \ 730 } 731 732 #define fc_rport_rd_attr(field, format_string, sz) \ 733 fc_rport_show_function(field, format_string, sz, ) \ 734 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 735 show_fc_rport_##field, NULL) 736 737 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 738 fc_rport_show_function(field, format_string, sz, (cast)) \ 739 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 740 show_fc_rport_##field, NULL) 741 742 #define fc_rport_rw_attr(field, format_string, sz) \ 743 fc_rport_show_function(field, format_string, sz, ) \ 744 fc_rport_store_function(field) \ 745 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 746 show_fc_rport_##field, \ 747 store_fc_rport_##field) 748 749 750 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 751 static ssize_t \ 752 show_fc_rport_##field (struct device *dev, \ 753 struct device_attribute *attr, char *buf) \ 754 { \ 755 struct fc_rport *rport = transport_class_to_rport(dev); \ 756 return snprintf(buf, sz, format_string, cast rport->field); \ 757 } 758 759 #define fc_private_rport_rd_attr(field, format_string, sz) \ 760 fc_private_rport_show_function(field, format_string, sz, ) \ 761 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 762 show_fc_rport_##field, NULL) 763 764 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 765 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 766 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 767 show_fc_rport_##field, NULL) 768 769 770 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 771 static ssize_t \ 772 show_fc_rport_##title (struct device *dev, \ 773 struct device_attribute *attr, char *buf) \ 774 { \ 775 struct fc_rport *rport = transport_class_to_rport(dev); \ 776 const char *name; \ 777 name = get_fc_##title##_name(rport->title); \ 778 if (!name) \ 779 return -EINVAL; \ 780 return snprintf(buf, maxlen, "%s\n", name); \ 781 } \ 782 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 783 show_fc_rport_##title, NULL) 784 785 786 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 787 i->private_rport_attrs[count] = device_attr_rport_##field; \ 788 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 789 i->private_rport_attrs[count].store = NULL; \ 790 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 791 if (i->f->show_rport_##field) \ 792 count++ 793 794 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 795 i->private_rport_attrs[count] = device_attr_rport_##field; \ 796 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 797 i->private_rport_attrs[count].store = NULL; \ 798 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 799 count++ 800 801 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 802 i->private_rport_attrs[count] = device_attr_rport_##field; \ 803 if (!i->f->set_rport_##field) { \ 804 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 805 i->private_rport_attrs[count].store = NULL; \ 806 } \ 807 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 808 if (i->f->show_rport_##field) \ 809 count++ 810 811 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 812 { \ 813 i->private_rport_attrs[count] = device_attr_rport_##field; \ 814 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 815 count++; \ 816 } 817 818 819 /* The FC Transport Remote Port Attributes: */ 820 821 /* Fixed Remote Port Attributes */ 822 823 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 824 825 static ssize_t 826 show_fc_rport_supported_classes (struct device *dev, 827 struct device_attribute *attr, char *buf) 828 { 829 struct fc_rport *rport = transport_class_to_rport(dev); 830 if (rport->supported_classes == FC_COS_UNSPECIFIED) 831 return snprintf(buf, 20, "unspecified\n"); 832 return get_fc_cos_names(rport->supported_classes, buf); 833 } 834 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 835 show_fc_rport_supported_classes, NULL); 836 837 /* Dynamic Remote Port Attributes */ 838 839 /* 840 * dev_loss_tmo attribute 841 */ 842 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 843 { 844 char *cp; 845 846 *val = simple_strtoul(buf, &cp, 0); 847 if ((*cp && (*cp != '\n')) || (*val < 0)) 848 return -EINVAL; 849 /* 850 * Check for overflow; dev_loss_tmo is u32 851 */ 852 if (*val > UINT_MAX) 853 return -EINVAL; 854 855 return 0; 856 } 857 858 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 859 unsigned long val) 860 { 861 struct Scsi_Host *shost = rport_to_shost(rport); 862 struct fc_internal *i = to_fc_internal(shost->transportt); 863 864 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 865 (rport->port_state == FC_PORTSTATE_DELETED) || 866 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 867 return -EBUSY; 868 /* 869 * Check for overflow; dev_loss_tmo is u32 870 */ 871 if (val > UINT_MAX) 872 return -EINVAL; 873 874 /* 875 * If fast_io_fail is off we have to cap 876 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 877 */ 878 if (rport->fast_io_fail_tmo == -1 && 879 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 880 return -EINVAL; 881 882 i->f->set_rport_dev_loss_tmo(rport, val); 883 return 0; 884 } 885 886 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 887 static ssize_t 888 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 889 const char *buf, size_t count) 890 { 891 struct fc_rport *rport = transport_class_to_rport(dev); 892 unsigned long val; 893 int rc; 894 895 rc = fc_str_to_dev_loss(buf, &val); 896 if (rc) 897 return rc; 898 899 rc = fc_rport_set_dev_loss_tmo(rport, val); 900 if (rc) 901 return rc; 902 return count; 903 } 904 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 905 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 906 907 908 /* Private Remote Port Attributes */ 909 910 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 911 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 912 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 913 914 static ssize_t 915 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 916 char *buf) 917 { 918 struct fc_rport *rport = transport_class_to_rport(dev); 919 920 /* identify any roles that are port_id specific */ 921 if ((rport->port_id != -1) && 922 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 923 FC_WELLKNOWN_PORTID_MASK) { 924 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 925 case FC_FPORT_PORTID: 926 return snprintf(buf, 30, "Fabric Port\n"); 927 case FC_FABCTLR_PORTID: 928 return snprintf(buf, 30, "Fabric Controller\n"); 929 case FC_DIRSRVR_PORTID: 930 return snprintf(buf, 30, "Directory Server\n"); 931 case FC_TIMESRVR_PORTID: 932 return snprintf(buf, 30, "Time Server\n"); 933 case FC_MGMTSRVR_PORTID: 934 return snprintf(buf, 30, "Management Server\n"); 935 default: 936 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 937 } 938 } else { 939 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 940 return snprintf(buf, 20, "unknown\n"); 941 return get_fc_port_roles_names(rport->roles, buf); 942 } 943 } 944 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 945 show_fc_rport_roles, NULL); 946 947 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 948 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 949 950 /* 951 * fast_io_fail_tmo attribute 952 */ 953 static ssize_t 954 show_fc_rport_fast_io_fail_tmo (struct device *dev, 955 struct device_attribute *attr, char *buf) 956 { 957 struct fc_rport *rport = transport_class_to_rport(dev); 958 959 if (rport->fast_io_fail_tmo == -1) 960 return snprintf(buf, 5, "off\n"); 961 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 962 } 963 964 static ssize_t 965 store_fc_rport_fast_io_fail_tmo(struct device *dev, 966 struct device_attribute *attr, const char *buf, 967 size_t count) 968 { 969 int val; 970 char *cp; 971 struct fc_rport *rport = transport_class_to_rport(dev); 972 973 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 974 (rport->port_state == FC_PORTSTATE_DELETED) || 975 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 976 return -EBUSY; 977 if (strncmp(buf, "off", 3) == 0) 978 rport->fast_io_fail_tmo = -1; 979 else { 980 val = simple_strtoul(buf, &cp, 0); 981 if ((*cp && (*cp != '\n')) || (val < 0)) 982 return -EINVAL; 983 /* 984 * Cap fast_io_fail by dev_loss_tmo or 985 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 986 */ 987 if ((val >= rport->dev_loss_tmo) || 988 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 989 return -EINVAL; 990 991 rport->fast_io_fail_tmo = val; 992 } 993 return count; 994 } 995 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 996 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 997 998 999 /* 1000 * FC SCSI Target Attribute Management 1001 */ 1002 1003 /* 1004 * Note: in the target show function we recognize when the remote 1005 * port is in the hierarchy and do not allow the driver to get 1006 * involved in sysfs functions. The driver only gets involved if 1007 * it's the "old" style that doesn't use rports. 1008 */ 1009 #define fc_starget_show_function(field, format_string, sz, cast) \ 1010 static ssize_t \ 1011 show_fc_starget_##field (struct device *dev, \ 1012 struct device_attribute *attr, char *buf) \ 1013 { \ 1014 struct scsi_target *starget = transport_class_to_starget(dev); \ 1015 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1016 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1017 struct fc_rport *rport = starget_to_rport(starget); \ 1018 if (rport) \ 1019 fc_starget_##field(starget) = rport->field; \ 1020 else if (i->f->get_starget_##field) \ 1021 i->f->get_starget_##field(starget); \ 1022 return snprintf(buf, sz, format_string, \ 1023 cast fc_starget_##field(starget)); \ 1024 } 1025 1026 #define fc_starget_rd_attr(field, format_string, sz) \ 1027 fc_starget_show_function(field, format_string, sz, ) \ 1028 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1029 show_fc_starget_##field, NULL) 1030 1031 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1032 fc_starget_show_function(field, format_string, sz, (cast)) \ 1033 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1034 show_fc_starget_##field, NULL) 1035 1036 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1037 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1038 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1039 i->private_starget_attrs[count].store = NULL; \ 1040 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1041 if (i->f->show_starget_##field) \ 1042 count++ 1043 1044 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1045 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1046 if (!i->f->set_starget_##field) { \ 1047 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1048 i->private_starget_attrs[count].store = NULL; \ 1049 } \ 1050 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1051 if (i->f->show_starget_##field) \ 1052 count++ 1053 1054 /* The FC Transport SCSI Target Attributes: */ 1055 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1056 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1057 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1058 1059 1060 /* 1061 * FC Virtual Port Attribute Management 1062 */ 1063 1064 #define fc_vport_show_function(field, format_string, sz, cast) \ 1065 static ssize_t \ 1066 show_fc_vport_##field (struct device *dev, \ 1067 struct device_attribute *attr, char *buf) \ 1068 { \ 1069 struct fc_vport *vport = transport_class_to_vport(dev); \ 1070 struct Scsi_Host *shost = vport_to_shost(vport); \ 1071 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1072 if ((i->f->get_vport_##field) && \ 1073 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1074 i->f->get_vport_##field(vport); \ 1075 return snprintf(buf, sz, format_string, cast vport->field); \ 1076 } 1077 1078 #define fc_vport_store_function(field) \ 1079 static ssize_t \ 1080 store_fc_vport_##field(struct device *dev, \ 1081 struct device_attribute *attr, \ 1082 const char *buf, size_t count) \ 1083 { \ 1084 int val; \ 1085 struct fc_vport *vport = transport_class_to_vport(dev); \ 1086 struct Scsi_Host *shost = vport_to_shost(vport); \ 1087 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1088 char *cp; \ 1089 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1090 return -EBUSY; \ 1091 val = simple_strtoul(buf, &cp, 0); \ 1092 if (*cp && (*cp != '\n')) \ 1093 return -EINVAL; \ 1094 i->f->set_vport_##field(vport, val); \ 1095 return count; \ 1096 } 1097 1098 #define fc_vport_store_str_function(field, slen) \ 1099 static ssize_t \ 1100 store_fc_vport_##field(struct device *dev, \ 1101 struct device_attribute *attr, \ 1102 const char *buf, size_t count) \ 1103 { \ 1104 struct fc_vport *vport = transport_class_to_vport(dev); \ 1105 struct Scsi_Host *shost = vport_to_shost(vport); \ 1106 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1107 unsigned int cnt=count; \ 1108 \ 1109 /* count may include a LF at end of string */ \ 1110 if (buf[cnt-1] == '\n') \ 1111 cnt--; \ 1112 if (cnt > ((slen) - 1)) \ 1113 return -EINVAL; \ 1114 memcpy(vport->field, buf, cnt); \ 1115 i->f->set_vport_##field(vport); \ 1116 return count; \ 1117 } 1118 1119 #define fc_vport_rd_attr(field, format_string, sz) \ 1120 fc_vport_show_function(field, format_string, sz, ) \ 1121 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1122 show_fc_vport_##field, NULL) 1123 1124 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1125 fc_vport_show_function(field, format_string, sz, (cast)) \ 1126 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1127 show_fc_vport_##field, NULL) 1128 1129 #define fc_vport_rw_attr(field, format_string, sz) \ 1130 fc_vport_show_function(field, format_string, sz, ) \ 1131 fc_vport_store_function(field) \ 1132 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1133 show_fc_vport_##field, \ 1134 store_fc_vport_##field) 1135 1136 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1137 static ssize_t \ 1138 show_fc_vport_##field (struct device *dev, \ 1139 struct device_attribute *attr, char *buf) \ 1140 { \ 1141 struct fc_vport *vport = transport_class_to_vport(dev); \ 1142 return snprintf(buf, sz, format_string, cast vport->field); \ 1143 } 1144 1145 #define fc_private_vport_store_u32_function(field) \ 1146 static ssize_t \ 1147 store_fc_vport_##field(struct device *dev, \ 1148 struct device_attribute *attr, \ 1149 const char *buf, size_t count) \ 1150 { \ 1151 u32 val; \ 1152 struct fc_vport *vport = transport_class_to_vport(dev); \ 1153 char *cp; \ 1154 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1155 return -EBUSY; \ 1156 val = simple_strtoul(buf, &cp, 0); \ 1157 if (*cp && (*cp != '\n')) \ 1158 return -EINVAL; \ 1159 vport->field = val; \ 1160 return count; \ 1161 } 1162 1163 1164 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1165 fc_private_vport_show_function(field, format_string, sz, ) \ 1166 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1167 show_fc_vport_##field, NULL) 1168 1169 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1170 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1171 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1172 show_fc_vport_##field, NULL) 1173 1174 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1175 fc_private_vport_show_function(field, format_string, sz, ) \ 1176 fc_private_vport_store_u32_function(field) \ 1177 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1178 show_fc_vport_##field, \ 1179 store_fc_vport_##field) 1180 1181 1182 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1183 static ssize_t \ 1184 show_fc_vport_##title (struct device *dev, \ 1185 struct device_attribute *attr, \ 1186 char *buf) \ 1187 { \ 1188 struct fc_vport *vport = transport_class_to_vport(dev); \ 1189 const char *name; \ 1190 name = get_fc_##title##_name(vport->title); \ 1191 if (!name) \ 1192 return -EINVAL; \ 1193 return snprintf(buf, maxlen, "%s\n", name); \ 1194 } \ 1195 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1196 show_fc_vport_##title, NULL) 1197 1198 1199 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1200 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1201 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1202 i->private_vport_attrs[count].store = NULL; \ 1203 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1204 if (i->f->get_##field) \ 1205 count++ 1206 /* NOTE: Above MACRO differs: checks function not show bit */ 1207 1208 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1209 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1210 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1211 i->private_vport_attrs[count].store = NULL; \ 1212 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1213 count++ 1214 1215 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1216 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1217 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1218 if (i->f->field) \ 1219 count++ 1220 /* NOTE: Above MACRO differs: checks function */ 1221 1222 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1223 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1224 if (!i->f->set_vport_##field) { \ 1225 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1226 i->private_vport_attrs[count].store = NULL; \ 1227 } \ 1228 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1229 count++ 1230 /* NOTE: Above MACRO differs: does not check show bit */ 1231 1232 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1233 { \ 1234 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1235 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1236 count++; \ 1237 } 1238 1239 1240 /* The FC Transport Virtual Port Attributes: */ 1241 1242 /* Fixed Virtual Port Attributes */ 1243 1244 /* Dynamic Virtual Port Attributes */ 1245 1246 /* Private Virtual Port Attributes */ 1247 1248 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1249 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1250 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1251 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1252 1253 static ssize_t 1254 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1255 char *buf) 1256 { 1257 struct fc_vport *vport = transport_class_to_vport(dev); 1258 1259 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1260 return snprintf(buf, 20, "unknown\n"); 1261 return get_fc_port_roles_names(vport->roles, buf); 1262 } 1263 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1264 1265 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1266 1267 fc_private_vport_show_function(symbolic_name, "%s\n", 1268 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1269 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1270 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1271 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1272 1273 static ssize_t 1274 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1275 const char *buf, size_t count) 1276 { 1277 struct fc_vport *vport = transport_class_to_vport(dev); 1278 struct Scsi_Host *shost = vport_to_shost(vport); 1279 unsigned long flags; 1280 1281 spin_lock_irqsave(shost->host_lock, flags); 1282 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1283 spin_unlock_irqrestore(shost->host_lock, flags); 1284 return -EBUSY; 1285 } 1286 vport->flags |= FC_VPORT_DELETING; 1287 spin_unlock_irqrestore(shost->host_lock, flags); 1288 1289 fc_queue_work(shost, &vport->vport_delete_work); 1290 return count; 1291 } 1292 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1293 NULL, store_fc_vport_delete); 1294 1295 1296 /* 1297 * Enable/Disable vport 1298 * Write "1" to disable, write "0" to enable 1299 */ 1300 static ssize_t 1301 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1302 const char *buf, 1303 size_t count) 1304 { 1305 struct fc_vport *vport = transport_class_to_vport(dev); 1306 struct Scsi_Host *shost = vport_to_shost(vport); 1307 struct fc_internal *i = to_fc_internal(shost->transportt); 1308 int stat; 1309 1310 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1311 return -EBUSY; 1312 1313 if (*buf == '0') { 1314 if (vport->vport_state != FC_VPORT_DISABLED) 1315 return -EALREADY; 1316 } else if (*buf == '1') { 1317 if (vport->vport_state == FC_VPORT_DISABLED) 1318 return -EALREADY; 1319 } else 1320 return -EINVAL; 1321 1322 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1323 return stat ? stat : count; 1324 } 1325 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1326 NULL, store_fc_vport_disable); 1327 1328 1329 /* 1330 * Host Attribute Management 1331 */ 1332 1333 #define fc_host_show_function(field, format_string, sz, cast) \ 1334 static ssize_t \ 1335 show_fc_host_##field (struct device *dev, \ 1336 struct device_attribute *attr, char *buf) \ 1337 { \ 1338 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1339 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1340 if (i->f->get_host_##field) \ 1341 i->f->get_host_##field(shost); \ 1342 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1343 } 1344 1345 #define fc_host_store_function(field) \ 1346 static ssize_t \ 1347 store_fc_host_##field(struct device *dev, \ 1348 struct device_attribute *attr, \ 1349 const char *buf, size_t count) \ 1350 { \ 1351 int val; \ 1352 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1353 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1354 char *cp; \ 1355 \ 1356 val = simple_strtoul(buf, &cp, 0); \ 1357 if (*cp && (*cp != '\n')) \ 1358 return -EINVAL; \ 1359 i->f->set_host_##field(shost, val); \ 1360 return count; \ 1361 } 1362 1363 #define fc_host_store_str_function(field, slen) \ 1364 static ssize_t \ 1365 store_fc_host_##field(struct device *dev, \ 1366 struct device_attribute *attr, \ 1367 const char *buf, size_t count) \ 1368 { \ 1369 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1370 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1371 unsigned int cnt=count; \ 1372 \ 1373 /* count may include a LF at end of string */ \ 1374 if (buf[cnt-1] == '\n') \ 1375 cnt--; \ 1376 if (cnt > ((slen) - 1)) \ 1377 return -EINVAL; \ 1378 memcpy(fc_host_##field(shost), buf, cnt); \ 1379 i->f->set_host_##field(shost); \ 1380 return count; \ 1381 } 1382 1383 #define fc_host_rd_attr(field, format_string, sz) \ 1384 fc_host_show_function(field, format_string, sz, ) \ 1385 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1386 show_fc_host_##field, NULL) 1387 1388 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1389 fc_host_show_function(field, format_string, sz, (cast)) \ 1390 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1391 show_fc_host_##field, NULL) 1392 1393 #define fc_host_rw_attr(field, format_string, sz) \ 1394 fc_host_show_function(field, format_string, sz, ) \ 1395 fc_host_store_function(field) \ 1396 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1397 show_fc_host_##field, \ 1398 store_fc_host_##field) 1399 1400 #define fc_host_rd_enum_attr(title, maxlen) \ 1401 static ssize_t \ 1402 show_fc_host_##title (struct device *dev, \ 1403 struct device_attribute *attr, char *buf) \ 1404 { \ 1405 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1406 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1407 const char *name; \ 1408 if (i->f->get_host_##title) \ 1409 i->f->get_host_##title(shost); \ 1410 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1411 if (!name) \ 1412 return -EINVAL; \ 1413 return snprintf(buf, maxlen, "%s\n", name); \ 1414 } \ 1415 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1416 1417 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1418 i->private_host_attrs[count] = device_attr_host_##field; \ 1419 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1420 i->private_host_attrs[count].store = NULL; \ 1421 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1422 if (i->f->show_host_##field) \ 1423 count++ 1424 1425 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1426 i->private_host_attrs[count] = device_attr_host_##field; \ 1427 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1428 i->private_host_attrs[count].store = NULL; \ 1429 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1430 count++ 1431 1432 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1433 i->private_host_attrs[count] = device_attr_host_##field; \ 1434 if (!i->f->set_host_##field) { \ 1435 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1436 i->private_host_attrs[count].store = NULL; \ 1437 } \ 1438 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1439 if (i->f->show_host_##field) \ 1440 count++ 1441 1442 1443 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1444 static ssize_t \ 1445 show_fc_host_##field (struct device *dev, \ 1446 struct device_attribute *attr, char *buf) \ 1447 { \ 1448 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1449 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1450 } 1451 1452 #define fc_private_host_rd_attr(field, format_string, sz) \ 1453 fc_private_host_show_function(field, format_string, sz, ) \ 1454 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1455 show_fc_host_##field, NULL) 1456 1457 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1458 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1459 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1460 show_fc_host_##field, NULL) 1461 1462 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1463 i->private_host_attrs[count] = device_attr_host_##field; \ 1464 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1465 i->private_host_attrs[count].store = NULL; \ 1466 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1467 count++ 1468 1469 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1470 { \ 1471 i->private_host_attrs[count] = device_attr_host_##field; \ 1472 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1473 count++; \ 1474 } 1475 1476 1477 /* Fixed Host Attributes */ 1478 1479 static ssize_t 1480 show_fc_host_supported_classes (struct device *dev, 1481 struct device_attribute *attr, char *buf) 1482 { 1483 struct Scsi_Host *shost = transport_class_to_shost(dev); 1484 1485 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1486 return snprintf(buf, 20, "unspecified\n"); 1487 1488 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1489 } 1490 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1491 show_fc_host_supported_classes, NULL); 1492 1493 static ssize_t 1494 show_fc_host_supported_fc4s (struct device *dev, 1495 struct device_attribute *attr, char *buf) 1496 { 1497 struct Scsi_Host *shost = transport_class_to_shost(dev); 1498 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1499 } 1500 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1501 show_fc_host_supported_fc4s, NULL); 1502 1503 static ssize_t 1504 show_fc_host_supported_speeds (struct device *dev, 1505 struct device_attribute *attr, char *buf) 1506 { 1507 struct Scsi_Host *shost = transport_class_to_shost(dev); 1508 1509 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1510 return snprintf(buf, 20, "unknown\n"); 1511 1512 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1513 } 1514 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1515 show_fc_host_supported_speeds, NULL); 1516 1517 1518 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1519 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1520 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1521 unsigned long long); 1522 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1523 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1524 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1525 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1526 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1527 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1528 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1529 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1530 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1531 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1532 1533 1534 /* Dynamic Host Attributes */ 1535 1536 static ssize_t 1537 show_fc_host_active_fc4s (struct device *dev, 1538 struct device_attribute *attr, char *buf) 1539 { 1540 struct Scsi_Host *shost = transport_class_to_shost(dev); 1541 struct fc_internal *i = to_fc_internal(shost->transportt); 1542 1543 if (i->f->get_host_active_fc4s) 1544 i->f->get_host_active_fc4s(shost); 1545 1546 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1547 } 1548 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1549 show_fc_host_active_fc4s, NULL); 1550 1551 static ssize_t 1552 show_fc_host_speed (struct device *dev, 1553 struct device_attribute *attr, char *buf) 1554 { 1555 struct Scsi_Host *shost = transport_class_to_shost(dev); 1556 struct fc_internal *i = to_fc_internal(shost->transportt); 1557 1558 if (i->f->get_host_speed) 1559 i->f->get_host_speed(shost); 1560 1561 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1562 return snprintf(buf, 20, "unknown\n"); 1563 1564 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1565 } 1566 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1567 show_fc_host_speed, NULL); 1568 1569 1570 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1571 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1572 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1573 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1574 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1575 1576 fc_private_host_show_function(system_hostname, "%s\n", 1577 FC_SYMBOLIC_NAME_SIZE + 1, ) 1578 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1579 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1580 show_fc_host_system_hostname, store_fc_host_system_hostname); 1581 1582 1583 /* Private Host Attributes */ 1584 1585 static ssize_t 1586 show_fc_private_host_tgtid_bind_type(struct device *dev, 1587 struct device_attribute *attr, char *buf) 1588 { 1589 struct Scsi_Host *shost = transport_class_to_shost(dev); 1590 const char *name; 1591 1592 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1593 if (!name) 1594 return -EINVAL; 1595 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1596 } 1597 1598 #define get_list_head_entry(pos, head, member) \ 1599 pos = list_entry((head)->next, typeof(*pos), member) 1600 1601 static ssize_t 1602 store_fc_private_host_tgtid_bind_type(struct device *dev, 1603 struct device_attribute *attr, const char *buf, size_t count) 1604 { 1605 struct Scsi_Host *shost = transport_class_to_shost(dev); 1606 struct fc_rport *rport; 1607 enum fc_tgtid_binding_type val; 1608 unsigned long flags; 1609 1610 if (get_fc_tgtid_bind_type_match(buf, &val)) 1611 return -EINVAL; 1612 1613 /* if changing bind type, purge all unused consistent bindings */ 1614 if (val != fc_host_tgtid_bind_type(shost)) { 1615 spin_lock_irqsave(shost->host_lock, flags); 1616 while (!list_empty(&fc_host_rport_bindings(shost))) { 1617 get_list_head_entry(rport, 1618 &fc_host_rport_bindings(shost), peers); 1619 list_del(&rport->peers); 1620 rport->port_state = FC_PORTSTATE_DELETED; 1621 fc_queue_work(shost, &rport->rport_delete_work); 1622 } 1623 spin_unlock_irqrestore(shost->host_lock, flags); 1624 } 1625 1626 fc_host_tgtid_bind_type(shost) = val; 1627 return count; 1628 } 1629 1630 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1631 show_fc_private_host_tgtid_bind_type, 1632 store_fc_private_host_tgtid_bind_type); 1633 1634 static ssize_t 1635 store_fc_private_host_issue_lip(struct device *dev, 1636 struct device_attribute *attr, const char *buf, size_t count) 1637 { 1638 struct Scsi_Host *shost = transport_class_to_shost(dev); 1639 struct fc_internal *i = to_fc_internal(shost->transportt); 1640 int ret; 1641 1642 /* ignore any data value written to the attribute */ 1643 if (i->f->issue_fc_host_lip) { 1644 ret = i->f->issue_fc_host_lip(shost); 1645 return ret ? ret: count; 1646 } 1647 1648 return -ENOENT; 1649 } 1650 1651 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1652 store_fc_private_host_issue_lip); 1653 1654 static ssize_t 1655 store_fc_private_host_dev_loss_tmo(struct device *dev, 1656 struct device_attribute *attr, 1657 const char *buf, size_t count) 1658 { 1659 struct Scsi_Host *shost = transport_class_to_shost(dev); 1660 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1661 struct fc_rport *rport; 1662 unsigned long val, flags; 1663 int rc; 1664 1665 rc = fc_str_to_dev_loss(buf, &val); 1666 if (rc) 1667 return rc; 1668 1669 fc_host_dev_loss_tmo(shost) = val; 1670 spin_lock_irqsave(shost->host_lock, flags); 1671 list_for_each_entry(rport, &fc_host->rports, peers) 1672 fc_rport_set_dev_loss_tmo(rport, val); 1673 spin_unlock_irqrestore(shost->host_lock, flags); 1674 return count; 1675 } 1676 1677 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 1678 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 1679 show_fc_host_dev_loss_tmo, 1680 store_fc_private_host_dev_loss_tmo); 1681 1682 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1683 1684 /* 1685 * Host Statistics Management 1686 */ 1687 1688 /* Show a given an attribute in the statistics group */ 1689 static ssize_t 1690 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1691 { 1692 struct Scsi_Host *shost = transport_class_to_shost(dev); 1693 struct fc_internal *i = to_fc_internal(shost->transportt); 1694 struct fc_host_statistics *stats; 1695 ssize_t ret = -ENOENT; 1696 1697 if (offset > sizeof(struct fc_host_statistics) || 1698 offset % sizeof(u64) != 0) 1699 WARN_ON(1); 1700 1701 if (i->f->get_fc_host_stats) { 1702 stats = (i->f->get_fc_host_stats)(shost); 1703 if (stats) 1704 ret = snprintf(buf, 20, "0x%llx\n", 1705 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1706 } 1707 return ret; 1708 } 1709 1710 1711 /* generate a read-only statistics attribute */ 1712 #define fc_host_statistic(name) \ 1713 static ssize_t show_fcstat_##name(struct device *cd, \ 1714 struct device_attribute *attr, \ 1715 char *buf) \ 1716 { \ 1717 return fc_stat_show(cd, buf, \ 1718 offsetof(struct fc_host_statistics, name)); \ 1719 } \ 1720 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1721 1722 fc_host_statistic(seconds_since_last_reset); 1723 fc_host_statistic(tx_frames); 1724 fc_host_statistic(tx_words); 1725 fc_host_statistic(rx_frames); 1726 fc_host_statistic(rx_words); 1727 fc_host_statistic(lip_count); 1728 fc_host_statistic(nos_count); 1729 fc_host_statistic(error_frames); 1730 fc_host_statistic(dumped_frames); 1731 fc_host_statistic(link_failure_count); 1732 fc_host_statistic(loss_of_sync_count); 1733 fc_host_statistic(loss_of_signal_count); 1734 fc_host_statistic(prim_seq_protocol_err_count); 1735 fc_host_statistic(invalid_tx_word_count); 1736 fc_host_statistic(invalid_crc_count); 1737 fc_host_statistic(fcp_input_requests); 1738 fc_host_statistic(fcp_output_requests); 1739 fc_host_statistic(fcp_control_requests); 1740 fc_host_statistic(fcp_input_megabytes); 1741 fc_host_statistic(fcp_output_megabytes); 1742 fc_host_statistic(fcp_packet_alloc_failures); 1743 fc_host_statistic(fcp_packet_aborts); 1744 fc_host_statistic(fcp_frame_alloc_failures); 1745 fc_host_statistic(fc_no_free_exch); 1746 fc_host_statistic(fc_no_free_exch_xid); 1747 fc_host_statistic(fc_xid_not_found); 1748 fc_host_statistic(fc_xid_busy); 1749 fc_host_statistic(fc_seq_not_found); 1750 fc_host_statistic(fc_non_bls_resp); 1751 1752 static ssize_t 1753 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1754 const char *buf, size_t count) 1755 { 1756 struct Scsi_Host *shost = transport_class_to_shost(dev); 1757 struct fc_internal *i = to_fc_internal(shost->transportt); 1758 1759 /* ignore any data value written to the attribute */ 1760 if (i->f->reset_fc_host_stats) { 1761 i->f->reset_fc_host_stats(shost); 1762 return count; 1763 } 1764 1765 return -ENOENT; 1766 } 1767 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1768 fc_reset_statistics); 1769 1770 static struct attribute *fc_statistics_attrs[] = { 1771 &device_attr_host_seconds_since_last_reset.attr, 1772 &device_attr_host_tx_frames.attr, 1773 &device_attr_host_tx_words.attr, 1774 &device_attr_host_rx_frames.attr, 1775 &device_attr_host_rx_words.attr, 1776 &device_attr_host_lip_count.attr, 1777 &device_attr_host_nos_count.attr, 1778 &device_attr_host_error_frames.attr, 1779 &device_attr_host_dumped_frames.attr, 1780 &device_attr_host_link_failure_count.attr, 1781 &device_attr_host_loss_of_sync_count.attr, 1782 &device_attr_host_loss_of_signal_count.attr, 1783 &device_attr_host_prim_seq_protocol_err_count.attr, 1784 &device_attr_host_invalid_tx_word_count.attr, 1785 &device_attr_host_invalid_crc_count.attr, 1786 &device_attr_host_fcp_input_requests.attr, 1787 &device_attr_host_fcp_output_requests.attr, 1788 &device_attr_host_fcp_control_requests.attr, 1789 &device_attr_host_fcp_input_megabytes.attr, 1790 &device_attr_host_fcp_output_megabytes.attr, 1791 &device_attr_host_fcp_packet_alloc_failures.attr, 1792 &device_attr_host_fcp_packet_aborts.attr, 1793 &device_attr_host_fcp_frame_alloc_failures.attr, 1794 &device_attr_host_fc_no_free_exch.attr, 1795 &device_attr_host_fc_no_free_exch_xid.attr, 1796 &device_attr_host_fc_xid_not_found.attr, 1797 &device_attr_host_fc_xid_busy.attr, 1798 &device_attr_host_fc_seq_not_found.attr, 1799 &device_attr_host_fc_non_bls_resp.attr, 1800 &device_attr_host_reset_statistics.attr, 1801 NULL 1802 }; 1803 1804 static struct attribute_group fc_statistics_group = { 1805 .name = "statistics", 1806 .attrs = fc_statistics_attrs, 1807 }; 1808 1809 1810 /* Host Vport Attributes */ 1811 1812 static int 1813 fc_parse_wwn(const char *ns, u64 *nm) 1814 { 1815 unsigned int i, j; 1816 u8 wwn[8]; 1817 1818 memset(wwn, 0, sizeof(wwn)); 1819 1820 /* Validate and store the new name */ 1821 for (i=0, j=0; i < 16; i++) { 1822 int value; 1823 1824 value = hex_to_bin(*ns++); 1825 if (value >= 0) 1826 j = (j << 4) | value; 1827 else 1828 return -EINVAL; 1829 if (i % 2) { 1830 wwn[i/2] = j & 0xff; 1831 j = 0; 1832 } 1833 } 1834 1835 *nm = wwn_to_u64(wwn); 1836 1837 return 0; 1838 } 1839 1840 1841 /* 1842 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1843 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1844 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1845 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1846 */ 1847 static ssize_t 1848 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1849 const char *buf, size_t count) 1850 { 1851 struct Scsi_Host *shost = transport_class_to_shost(dev); 1852 struct fc_vport_identifiers vid; 1853 struct fc_vport *vport; 1854 unsigned int cnt=count; 1855 int stat; 1856 1857 memset(&vid, 0, sizeof(vid)); 1858 1859 /* count may include a LF at end of string */ 1860 if (buf[cnt-1] == '\n') 1861 cnt--; 1862 1863 /* validate we have enough characters for WWPN */ 1864 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1865 return -EINVAL; 1866 1867 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1868 if (stat) 1869 return stat; 1870 1871 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1872 if (stat) 1873 return stat; 1874 1875 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1876 vid.vport_type = FC_PORTTYPE_NPIV; 1877 /* vid.symbolic_name is already zero/NULL's */ 1878 vid.disable = false; /* always enabled */ 1879 1880 /* we only allow support on Channel 0 !!! */ 1881 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1882 return stat ? stat : count; 1883 } 1884 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1885 store_fc_host_vport_create); 1886 1887 1888 /* 1889 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1890 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1891 * The WWNs are specified as hex characters, and may *not* contain 1892 * any prefixes (e.g. 0x, x, etc) 1893 */ 1894 static ssize_t 1895 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1896 const char *buf, size_t count) 1897 { 1898 struct Scsi_Host *shost = transport_class_to_shost(dev); 1899 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1900 struct fc_vport *vport; 1901 u64 wwpn, wwnn; 1902 unsigned long flags; 1903 unsigned int cnt=count; 1904 int stat, match; 1905 1906 /* count may include a LF at end of string */ 1907 if (buf[cnt-1] == '\n') 1908 cnt--; 1909 1910 /* validate we have enough characters for WWPN */ 1911 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1912 return -EINVAL; 1913 1914 stat = fc_parse_wwn(&buf[0], &wwpn); 1915 if (stat) 1916 return stat; 1917 1918 stat = fc_parse_wwn(&buf[17], &wwnn); 1919 if (stat) 1920 return stat; 1921 1922 spin_lock_irqsave(shost->host_lock, flags); 1923 match = 0; 1924 /* we only allow support on Channel 0 !!! */ 1925 list_for_each_entry(vport, &fc_host->vports, peers) { 1926 if ((vport->channel == 0) && 1927 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1928 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1929 break; 1930 vport->flags |= FC_VPORT_DELETING; 1931 match = 1; 1932 break; 1933 } 1934 } 1935 spin_unlock_irqrestore(shost->host_lock, flags); 1936 1937 if (!match) 1938 return -ENODEV; 1939 1940 stat = fc_vport_terminate(vport); 1941 return stat ? stat : count; 1942 } 1943 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1944 store_fc_host_vport_delete); 1945 1946 1947 static int fc_host_match(struct attribute_container *cont, 1948 struct device *dev) 1949 { 1950 struct Scsi_Host *shost; 1951 struct fc_internal *i; 1952 1953 if (!scsi_is_host_device(dev)) 1954 return 0; 1955 1956 shost = dev_to_shost(dev); 1957 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1958 != &fc_host_class.class) 1959 return 0; 1960 1961 i = to_fc_internal(shost->transportt); 1962 1963 return &i->t.host_attrs.ac == cont; 1964 } 1965 1966 static int fc_target_match(struct attribute_container *cont, 1967 struct device *dev) 1968 { 1969 struct Scsi_Host *shost; 1970 struct fc_internal *i; 1971 1972 if (!scsi_is_target_device(dev)) 1973 return 0; 1974 1975 shost = dev_to_shost(dev->parent); 1976 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1977 != &fc_host_class.class) 1978 return 0; 1979 1980 i = to_fc_internal(shost->transportt); 1981 1982 return &i->t.target_attrs.ac == cont; 1983 } 1984 1985 static void fc_rport_dev_release(struct device *dev) 1986 { 1987 struct fc_rport *rport = dev_to_rport(dev); 1988 put_device(dev->parent); 1989 kfree(rport); 1990 } 1991 1992 int scsi_is_fc_rport(const struct device *dev) 1993 { 1994 return dev->release == fc_rport_dev_release; 1995 } 1996 EXPORT_SYMBOL(scsi_is_fc_rport); 1997 1998 static int fc_rport_match(struct attribute_container *cont, 1999 struct device *dev) 2000 { 2001 struct Scsi_Host *shost; 2002 struct fc_internal *i; 2003 2004 if (!scsi_is_fc_rport(dev)) 2005 return 0; 2006 2007 shost = dev_to_shost(dev->parent); 2008 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2009 != &fc_host_class.class) 2010 return 0; 2011 2012 i = to_fc_internal(shost->transportt); 2013 2014 return &i->rport_attr_cont.ac == cont; 2015 } 2016 2017 2018 static void fc_vport_dev_release(struct device *dev) 2019 { 2020 struct fc_vport *vport = dev_to_vport(dev); 2021 put_device(dev->parent); /* release kobj parent */ 2022 kfree(vport); 2023 } 2024 2025 int scsi_is_fc_vport(const struct device *dev) 2026 { 2027 return dev->release == fc_vport_dev_release; 2028 } 2029 EXPORT_SYMBOL(scsi_is_fc_vport); 2030 2031 static int fc_vport_match(struct attribute_container *cont, 2032 struct device *dev) 2033 { 2034 struct fc_vport *vport; 2035 struct Scsi_Host *shost; 2036 struct fc_internal *i; 2037 2038 if (!scsi_is_fc_vport(dev)) 2039 return 0; 2040 vport = dev_to_vport(dev); 2041 2042 shost = vport_to_shost(vport); 2043 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2044 != &fc_host_class.class) 2045 return 0; 2046 2047 i = to_fc_internal(shost->transportt); 2048 return &i->vport_attr_cont.ac == cont; 2049 } 2050 2051 2052 /** 2053 * fc_timed_out - FC Transport I/O timeout intercept handler 2054 * @scmd: The SCSI command which timed out 2055 * 2056 * This routine protects against error handlers getting invoked while a 2057 * rport is in a blocked state, typically due to a temporarily loss of 2058 * connectivity. If the error handlers are allowed to proceed, requests 2059 * to abort i/o, reset the target, etc will likely fail as there is no way 2060 * to communicate with the device to perform the requested function. These 2061 * failures may result in the midlayer taking the device offline, requiring 2062 * manual intervention to restore operation. 2063 * 2064 * This routine, called whenever an i/o times out, validates the state of 2065 * the underlying rport. If the rport is blocked, it returns 2066 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2067 * Eventually, either the device will return, or devloss_tmo will fire, 2068 * and when the timeout then fires, it will be handled normally. 2069 * If the rport is not blocked, normal error handling continues. 2070 * 2071 * Notes: 2072 * This routine assumes no locks are held on entry. 2073 */ 2074 static enum blk_eh_timer_return 2075 fc_timed_out(struct scsi_cmnd *scmd) 2076 { 2077 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2078 2079 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2080 return BLK_EH_RESET_TIMER; 2081 2082 return BLK_EH_NOT_HANDLED; 2083 } 2084 2085 /* 2086 * Called by fc_user_scan to locate an rport on the shost that 2087 * matches the channel and target id, and invoke scsi_scan_target() 2088 * on the rport. 2089 */ 2090 static void 2091 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2092 { 2093 struct fc_rport *rport; 2094 unsigned long flags; 2095 2096 spin_lock_irqsave(shost->host_lock, flags); 2097 2098 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2099 if (rport->scsi_target_id == -1) 2100 continue; 2101 2102 if (rport->port_state != FC_PORTSTATE_ONLINE) 2103 continue; 2104 2105 if ((channel == rport->channel) && 2106 (id == rport->scsi_target_id)) { 2107 spin_unlock_irqrestore(shost->host_lock, flags); 2108 scsi_scan_target(&rport->dev, channel, id, lun, 1); 2109 return; 2110 } 2111 } 2112 2113 spin_unlock_irqrestore(shost->host_lock, flags); 2114 } 2115 2116 /* 2117 * Called via sysfs scan routines. Necessary, as the FC transport 2118 * wants to place all target objects below the rport object. So this 2119 * routine must invoke the scsi_scan_target() routine with the rport 2120 * object as the parent. 2121 */ 2122 static int 2123 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2124 { 2125 uint chlo, chhi; 2126 uint tgtlo, tgthi; 2127 2128 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2129 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2130 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2131 return -EINVAL; 2132 2133 if (channel == SCAN_WILD_CARD) { 2134 chlo = 0; 2135 chhi = shost->max_channel + 1; 2136 } else { 2137 chlo = channel; 2138 chhi = channel + 1; 2139 } 2140 2141 if (id == SCAN_WILD_CARD) { 2142 tgtlo = 0; 2143 tgthi = shost->max_id; 2144 } else { 2145 tgtlo = id; 2146 tgthi = id + 1; 2147 } 2148 2149 for ( ; chlo < chhi; chlo++) 2150 for ( ; tgtlo < tgthi; tgtlo++) 2151 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2152 2153 return 0; 2154 } 2155 2156 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, 2157 int result) 2158 { 2159 struct fc_internal *i = to_fc_internal(shost->transportt); 2160 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); 2161 } 2162 2163 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) 2164 { 2165 struct fc_internal *i = to_fc_internal(shost->transportt); 2166 return i->f->it_nexus_response(shost, nexus, result); 2167 } 2168 2169 struct scsi_transport_template * 2170 fc_attach_transport(struct fc_function_template *ft) 2171 { 2172 int count; 2173 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2174 GFP_KERNEL); 2175 2176 if (unlikely(!i)) 2177 return NULL; 2178 2179 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2180 i->t.target_attrs.ac.class = &fc_transport_class.class; 2181 i->t.target_attrs.ac.match = fc_target_match; 2182 i->t.target_size = sizeof(struct fc_starget_attrs); 2183 transport_container_register(&i->t.target_attrs); 2184 2185 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2186 i->t.host_attrs.ac.class = &fc_host_class.class; 2187 i->t.host_attrs.ac.match = fc_host_match; 2188 i->t.host_size = sizeof(struct fc_host_attrs); 2189 if (ft->get_fc_host_stats) 2190 i->t.host_attrs.statistics = &fc_statistics_group; 2191 transport_container_register(&i->t.host_attrs); 2192 2193 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2194 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2195 i->rport_attr_cont.ac.match = fc_rport_match; 2196 transport_container_register(&i->rport_attr_cont); 2197 2198 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2199 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2200 i->vport_attr_cont.ac.match = fc_vport_match; 2201 transport_container_register(&i->vport_attr_cont); 2202 2203 i->f = ft; 2204 2205 /* Transport uses the shost workq for scsi scanning */ 2206 i->t.create_work_queue = 1; 2207 2208 i->t.eh_timed_out = fc_timed_out; 2209 2210 i->t.user_scan = fc_user_scan; 2211 2212 /* target-mode drivers' functions */ 2213 i->t.tsk_mgmt_response = fc_tsk_mgmt_response; 2214 i->t.it_nexus_response = fc_it_nexus_response; 2215 2216 /* 2217 * Setup SCSI Target Attributes. 2218 */ 2219 count = 0; 2220 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2221 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2222 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2223 2224 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2225 2226 i->starget_attrs[count] = NULL; 2227 2228 2229 /* 2230 * Setup SCSI Host Attributes. 2231 */ 2232 count=0; 2233 SETUP_HOST_ATTRIBUTE_RD(node_name); 2234 SETUP_HOST_ATTRIBUTE_RD(port_name); 2235 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2236 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2237 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2238 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2239 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2240 if (ft->vport_create) { 2241 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2242 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2243 } 2244 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2245 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2246 SETUP_HOST_ATTRIBUTE_RD(model); 2247 SETUP_HOST_ATTRIBUTE_RD(model_description); 2248 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2249 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2250 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2251 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2252 2253 SETUP_HOST_ATTRIBUTE_RD(port_id); 2254 SETUP_HOST_ATTRIBUTE_RD(port_type); 2255 SETUP_HOST_ATTRIBUTE_RD(port_state); 2256 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2257 SETUP_HOST_ATTRIBUTE_RD(speed); 2258 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2259 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2260 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2261 2262 /* Transport-managed attributes */ 2263 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2264 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2265 if (ft->issue_fc_host_lip) 2266 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2267 if (ft->vport_create) 2268 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2269 if (ft->vport_delete) 2270 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2271 2272 BUG_ON(count > FC_HOST_NUM_ATTRS); 2273 2274 i->host_attrs[count] = NULL; 2275 2276 /* 2277 * Setup Remote Port Attributes. 2278 */ 2279 count=0; 2280 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2281 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2282 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2283 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2284 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2285 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2286 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2287 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2288 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2289 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2290 2291 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2292 2293 i->rport_attrs[count] = NULL; 2294 2295 /* 2296 * Setup Virtual Port Attributes. 2297 */ 2298 count=0; 2299 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2300 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2301 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2302 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2303 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2304 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2305 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2306 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2307 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2308 2309 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2310 2311 i->vport_attrs[count] = NULL; 2312 2313 return &i->t; 2314 } 2315 EXPORT_SYMBOL(fc_attach_transport); 2316 2317 void fc_release_transport(struct scsi_transport_template *t) 2318 { 2319 struct fc_internal *i = to_fc_internal(t); 2320 2321 transport_container_unregister(&i->t.target_attrs); 2322 transport_container_unregister(&i->t.host_attrs); 2323 transport_container_unregister(&i->rport_attr_cont); 2324 transport_container_unregister(&i->vport_attr_cont); 2325 2326 kfree(i); 2327 } 2328 EXPORT_SYMBOL(fc_release_transport); 2329 2330 /** 2331 * fc_queue_work - Queue work to the fc_host workqueue. 2332 * @shost: Pointer to Scsi_Host bound to fc_host. 2333 * @work: Work to queue for execution. 2334 * 2335 * Return value: 2336 * 1 - work queued for execution 2337 * 0 - work is already queued 2338 * -EINVAL - work queue doesn't exist 2339 */ 2340 static int 2341 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2342 { 2343 if (unlikely(!fc_host_work_q(shost))) { 2344 printk(KERN_ERR 2345 "ERROR: FC host '%s' attempted to queue work, " 2346 "when no workqueue created.\n", shost->hostt->name); 2347 dump_stack(); 2348 2349 return -EINVAL; 2350 } 2351 2352 return queue_work(fc_host_work_q(shost), work); 2353 } 2354 2355 /** 2356 * fc_flush_work - Flush a fc_host's workqueue. 2357 * @shost: Pointer to Scsi_Host bound to fc_host. 2358 */ 2359 static void 2360 fc_flush_work(struct Scsi_Host *shost) 2361 { 2362 if (!fc_host_work_q(shost)) { 2363 printk(KERN_ERR 2364 "ERROR: FC host '%s' attempted to flush work, " 2365 "when no workqueue created.\n", shost->hostt->name); 2366 dump_stack(); 2367 return; 2368 } 2369 2370 flush_workqueue(fc_host_work_q(shost)); 2371 } 2372 2373 /** 2374 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2375 * @shost: Pointer to Scsi_Host bound to fc_host. 2376 * @work: Work to queue for execution. 2377 * @delay: jiffies to delay the work queuing 2378 * 2379 * Return value: 2380 * 1 on success / 0 already queued / < 0 for error 2381 */ 2382 static int 2383 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2384 unsigned long delay) 2385 { 2386 if (unlikely(!fc_host_devloss_work_q(shost))) { 2387 printk(KERN_ERR 2388 "ERROR: FC host '%s' attempted to queue work, " 2389 "when no workqueue created.\n", shost->hostt->name); 2390 dump_stack(); 2391 2392 return -EINVAL; 2393 } 2394 2395 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2396 } 2397 2398 /** 2399 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2400 * @shost: Pointer to Scsi_Host bound to fc_host. 2401 */ 2402 static void 2403 fc_flush_devloss(struct Scsi_Host *shost) 2404 { 2405 if (!fc_host_devloss_work_q(shost)) { 2406 printk(KERN_ERR 2407 "ERROR: FC host '%s' attempted to flush work, " 2408 "when no workqueue created.\n", shost->hostt->name); 2409 dump_stack(); 2410 return; 2411 } 2412 2413 flush_workqueue(fc_host_devloss_work_q(shost)); 2414 } 2415 2416 2417 /** 2418 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2419 * @shost: Which &Scsi_Host 2420 * 2421 * This routine is expected to be called immediately preceding the 2422 * a driver's call to scsi_remove_host(). 2423 * 2424 * WARNING: A driver utilizing the fc_transport, which fails to call 2425 * this routine prior to scsi_remove_host(), will leave dangling 2426 * objects in /sys/class/fc_remote_ports. Access to any of these 2427 * objects can result in a system crash !!! 2428 * 2429 * Notes: 2430 * This routine assumes no locks are held on entry. 2431 */ 2432 void 2433 fc_remove_host(struct Scsi_Host *shost) 2434 { 2435 struct fc_vport *vport = NULL, *next_vport = NULL; 2436 struct fc_rport *rport = NULL, *next_rport = NULL; 2437 struct workqueue_struct *work_q; 2438 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2439 unsigned long flags; 2440 2441 spin_lock_irqsave(shost->host_lock, flags); 2442 2443 /* Remove any vports */ 2444 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) 2445 fc_queue_work(shost, &vport->vport_delete_work); 2446 2447 /* Remove any remote ports */ 2448 list_for_each_entry_safe(rport, next_rport, 2449 &fc_host->rports, peers) { 2450 list_del(&rport->peers); 2451 rport->port_state = FC_PORTSTATE_DELETED; 2452 fc_queue_work(shost, &rport->rport_delete_work); 2453 } 2454 2455 list_for_each_entry_safe(rport, next_rport, 2456 &fc_host->rport_bindings, peers) { 2457 list_del(&rport->peers); 2458 rport->port_state = FC_PORTSTATE_DELETED; 2459 fc_queue_work(shost, &rport->rport_delete_work); 2460 } 2461 2462 spin_unlock_irqrestore(shost->host_lock, flags); 2463 2464 /* flush all scan work items */ 2465 scsi_flush_work(shost); 2466 2467 /* flush all stgt delete, and rport delete work items, then kill it */ 2468 if (fc_host->work_q) { 2469 work_q = fc_host->work_q; 2470 fc_host->work_q = NULL; 2471 destroy_workqueue(work_q); 2472 } 2473 2474 /* flush all devloss work items, then kill it */ 2475 if (fc_host->devloss_work_q) { 2476 work_q = fc_host->devloss_work_q; 2477 fc_host->devloss_work_q = NULL; 2478 destroy_workqueue(work_q); 2479 } 2480 } 2481 EXPORT_SYMBOL(fc_remove_host); 2482 2483 static void fc_terminate_rport_io(struct fc_rport *rport) 2484 { 2485 struct Scsi_Host *shost = rport_to_shost(rport); 2486 struct fc_internal *i = to_fc_internal(shost->transportt); 2487 2488 /* Involve the LLDD if possible to terminate all io on the rport. */ 2489 if (i->f->terminate_rport_io) 2490 i->f->terminate_rport_io(rport); 2491 2492 /* 2493 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2494 */ 2495 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2496 } 2497 2498 /** 2499 * fc_starget_delete - called to delete the scsi descendants of an rport 2500 * @work: remote port to be operated on. 2501 * 2502 * Deletes target and all sdevs. 2503 */ 2504 static void 2505 fc_starget_delete(struct work_struct *work) 2506 { 2507 struct fc_rport *rport = 2508 container_of(work, struct fc_rport, stgt_delete_work); 2509 2510 fc_terminate_rport_io(rport); 2511 scsi_remove_target(&rport->dev); 2512 } 2513 2514 2515 /** 2516 * fc_rport_final_delete - finish rport termination and delete it. 2517 * @work: remote port to be deleted. 2518 */ 2519 static void 2520 fc_rport_final_delete(struct work_struct *work) 2521 { 2522 struct fc_rport *rport = 2523 container_of(work, struct fc_rport, rport_delete_work); 2524 struct device *dev = &rport->dev; 2525 struct Scsi_Host *shost = rport_to_shost(rport); 2526 struct fc_internal *i = to_fc_internal(shost->transportt); 2527 unsigned long flags; 2528 int do_callback = 0; 2529 2530 fc_terminate_rport_io(rport); 2531 2532 /* 2533 * if a scan is pending, flush the SCSI Host work_q so that 2534 * that we can reclaim the rport scan work element. 2535 */ 2536 if (rport->flags & FC_RPORT_SCAN_PENDING) 2537 scsi_flush_work(shost); 2538 2539 /* 2540 * Cancel any outstanding timers. These should really exist 2541 * only when rmmod'ing the LLDD and we're asking for 2542 * immediate termination of the rports 2543 */ 2544 spin_lock_irqsave(shost->host_lock, flags); 2545 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2546 spin_unlock_irqrestore(shost->host_lock, flags); 2547 if (!cancel_delayed_work(&rport->fail_io_work)) 2548 fc_flush_devloss(shost); 2549 if (!cancel_delayed_work(&rport->dev_loss_work)) 2550 fc_flush_devloss(shost); 2551 spin_lock_irqsave(shost->host_lock, flags); 2552 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2553 } 2554 spin_unlock_irqrestore(shost->host_lock, flags); 2555 2556 /* Delete SCSI target and sdevs */ 2557 if (rport->scsi_target_id != -1) 2558 fc_starget_delete(&rport->stgt_delete_work); 2559 2560 /* 2561 * Notify the driver that the rport is now dead. The LLDD will 2562 * also guarantee that any communication to the rport is terminated 2563 * 2564 * Avoid this call if we already called it when we preserved the 2565 * rport for the binding. 2566 */ 2567 spin_lock_irqsave(shost->host_lock, flags); 2568 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2569 (i->f->dev_loss_tmo_callbk)) { 2570 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2571 do_callback = 1; 2572 } 2573 spin_unlock_irqrestore(shost->host_lock, flags); 2574 2575 if (do_callback) 2576 i->f->dev_loss_tmo_callbk(rport); 2577 2578 fc_bsg_remove(rport->rqst_q); 2579 2580 transport_remove_device(dev); 2581 device_del(dev); 2582 transport_destroy_device(dev); 2583 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2584 put_device(dev); /* for self-reference */ 2585 } 2586 2587 2588 /** 2589 * fc_rport_create - allocates and creates a remote FC port. 2590 * @shost: scsi host the remote port is connected to. 2591 * @channel: Channel on shost port connected to. 2592 * @ids: The world wide names, fc address, and FC4 port 2593 * roles for the remote port. 2594 * 2595 * Allocates and creates the remoter port structure, including the 2596 * class and sysfs creation. 2597 * 2598 * Notes: 2599 * This routine assumes no locks are held on entry. 2600 */ 2601 static struct fc_rport * 2602 fc_rport_create(struct Scsi_Host *shost, int channel, 2603 struct fc_rport_identifiers *ids) 2604 { 2605 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2606 struct fc_internal *fci = to_fc_internal(shost->transportt); 2607 struct fc_rport *rport; 2608 struct device *dev; 2609 unsigned long flags; 2610 int error; 2611 size_t size; 2612 2613 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2614 rport = kzalloc(size, GFP_KERNEL); 2615 if (unlikely(!rport)) { 2616 printk(KERN_ERR "%s: allocation failure\n", __func__); 2617 return NULL; 2618 } 2619 2620 rport->maxframe_size = -1; 2621 rport->supported_classes = FC_COS_UNSPECIFIED; 2622 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2623 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2624 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2625 rport->port_id = ids->port_id; 2626 rport->roles = ids->roles; 2627 rport->port_state = FC_PORTSTATE_ONLINE; 2628 if (fci->f->dd_fcrport_size) 2629 rport->dd_data = &rport[1]; 2630 rport->channel = channel; 2631 rport->fast_io_fail_tmo = -1; 2632 2633 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2634 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2635 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2636 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2637 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2638 2639 spin_lock_irqsave(shost->host_lock, flags); 2640 2641 rport->number = fc_host->next_rport_number++; 2642 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) 2643 rport->scsi_target_id = fc_host->next_target_id++; 2644 else 2645 rport->scsi_target_id = -1; 2646 list_add_tail(&rport->peers, &fc_host->rports); 2647 get_device(&shost->shost_gendev); /* for fc_host->rport list */ 2648 2649 spin_unlock_irqrestore(shost->host_lock, flags); 2650 2651 dev = &rport->dev; 2652 device_initialize(dev); /* takes self reference */ 2653 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2654 dev->release = fc_rport_dev_release; 2655 dev_set_name(dev, "rport-%d:%d-%d", 2656 shost->host_no, channel, rport->number); 2657 transport_setup_device(dev); 2658 2659 error = device_add(dev); 2660 if (error) { 2661 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2662 goto delete_rport; 2663 } 2664 transport_add_device(dev); 2665 transport_configure_device(dev); 2666 2667 fc_bsg_rportadd(shost, rport); 2668 /* ignore any bsg add error - we just can't do sgio */ 2669 2670 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2671 /* initiate a scan of the target */ 2672 rport->flags |= FC_RPORT_SCAN_PENDING; 2673 scsi_queue_work(shost, &rport->scan_work); 2674 } 2675 2676 return rport; 2677 2678 delete_rport: 2679 transport_destroy_device(dev); 2680 spin_lock_irqsave(shost->host_lock, flags); 2681 list_del(&rport->peers); 2682 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2683 spin_unlock_irqrestore(shost->host_lock, flags); 2684 put_device(dev->parent); 2685 kfree(rport); 2686 return NULL; 2687 } 2688 2689 /** 2690 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2691 * @shost: scsi host the remote port is connected to. 2692 * @channel: Channel on shost port connected to. 2693 * @ids: The world wide names, fc address, and FC4 port 2694 * roles for the remote port. 2695 * 2696 * The LLDD calls this routine to notify the transport of the existence 2697 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2698 * of the port, it's FC address (port_id), and the FC4 roles that are 2699 * active for the port. 2700 * 2701 * For ports that are FCP targets (aka scsi targets), the FC transport 2702 * maintains consistent target id bindings on behalf of the LLDD. 2703 * A consistent target id binding is an assignment of a target id to 2704 * a remote port identifier, which persists while the scsi host is 2705 * attached. The remote port can disappear, then later reappear, and 2706 * it's target id assignment remains the same. This allows for shifts 2707 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2708 * changes to the scsi subsystem which is based on scsi host number and 2709 * target id values. Bindings are only valid during the attachment of 2710 * the scsi host. If the host detaches, then later re-attaches, target 2711 * id bindings may change. 2712 * 2713 * This routine is responsible for returning a remote port structure. 2714 * The routine will search the list of remote ports it maintains 2715 * internally on behalf of consistent target id mappings. If found, the 2716 * remote port structure will be reused. Otherwise, a new remote port 2717 * structure will be allocated. 2718 * 2719 * Whenever a remote port is allocated, a new fc_remote_port class 2720 * device is created. 2721 * 2722 * Should not be called from interrupt context. 2723 * 2724 * Notes: 2725 * This routine assumes no locks are held on entry. 2726 */ 2727 struct fc_rport * 2728 fc_remote_port_add(struct Scsi_Host *shost, int channel, 2729 struct fc_rport_identifiers *ids) 2730 { 2731 struct fc_internal *fci = to_fc_internal(shost->transportt); 2732 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2733 struct fc_rport *rport; 2734 unsigned long flags; 2735 int match = 0; 2736 2737 /* ensure any stgt delete functions are done */ 2738 fc_flush_work(shost); 2739 2740 /* 2741 * Search the list of "active" rports, for an rport that has been 2742 * deleted, but we've held off the real delete while the target 2743 * is in a "blocked" state. 2744 */ 2745 spin_lock_irqsave(shost->host_lock, flags); 2746 2747 list_for_each_entry(rport, &fc_host->rports, peers) { 2748 2749 if ((rport->port_state == FC_PORTSTATE_BLOCKED) && 2750 (rport->channel == channel)) { 2751 2752 switch (fc_host->tgtid_bind_type) { 2753 case FC_TGTID_BIND_BY_WWPN: 2754 case FC_TGTID_BIND_NONE: 2755 if (rport->port_name == ids->port_name) 2756 match = 1; 2757 break; 2758 case FC_TGTID_BIND_BY_WWNN: 2759 if (rport->node_name == ids->node_name) 2760 match = 1; 2761 break; 2762 case FC_TGTID_BIND_BY_ID: 2763 if (rport->port_id == ids->port_id) 2764 match = 1; 2765 break; 2766 } 2767 2768 if (match) { 2769 2770 memcpy(&rport->node_name, &ids->node_name, 2771 sizeof(rport->node_name)); 2772 memcpy(&rport->port_name, &ids->port_name, 2773 sizeof(rport->port_name)); 2774 rport->port_id = ids->port_id; 2775 2776 rport->port_state = FC_PORTSTATE_ONLINE; 2777 rport->roles = ids->roles; 2778 2779 spin_unlock_irqrestore(shost->host_lock, flags); 2780 2781 if (fci->f->dd_fcrport_size) 2782 memset(rport->dd_data, 0, 2783 fci->f->dd_fcrport_size); 2784 2785 /* 2786 * If we were not a target, cancel the 2787 * io terminate and rport timers, and 2788 * we're done. 2789 * 2790 * If we were a target, but our new role 2791 * doesn't indicate a target, leave the 2792 * timers running expecting the role to 2793 * change as the target fully logs in. If 2794 * it doesn't, the target will be torn down. 2795 * 2796 * If we were a target, and our role shows 2797 * we're still a target, cancel the timers 2798 * and kick off a scan. 2799 */ 2800 2801 /* was a target, not in roles */ 2802 if ((rport->scsi_target_id != -1) && 2803 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2804 return rport; 2805 2806 /* 2807 * Stop the fail io and dev_loss timers. 2808 * If they flush, the port_state will 2809 * be checked and will NOOP the function. 2810 */ 2811 if (!cancel_delayed_work(&rport->fail_io_work)) 2812 fc_flush_devloss(shost); 2813 if (!cancel_delayed_work(&rport->dev_loss_work)) 2814 fc_flush_devloss(shost); 2815 2816 spin_lock_irqsave(shost->host_lock, flags); 2817 2818 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2819 FC_RPORT_DEVLOSS_PENDING | 2820 FC_RPORT_DEVLOSS_CALLBK_DONE); 2821 2822 spin_unlock_irqrestore(shost->host_lock, flags); 2823 2824 /* if target, initiate a scan */ 2825 if (rport->scsi_target_id != -1) { 2826 scsi_target_unblock(&rport->dev, 2827 SDEV_RUNNING); 2828 spin_lock_irqsave(shost->host_lock, 2829 flags); 2830 rport->flags |= FC_RPORT_SCAN_PENDING; 2831 scsi_queue_work(shost, 2832 &rport->scan_work); 2833 spin_unlock_irqrestore(shost->host_lock, 2834 flags); 2835 } 2836 2837 fc_bsg_goose_queue(rport); 2838 2839 return rport; 2840 } 2841 } 2842 } 2843 2844 /* 2845 * Search the bindings array 2846 * Note: if never a FCP target, you won't be on this list 2847 */ 2848 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2849 2850 /* search for a matching consistent binding */ 2851 2852 list_for_each_entry(rport, &fc_host->rport_bindings, 2853 peers) { 2854 if (rport->channel != channel) 2855 continue; 2856 2857 switch (fc_host->tgtid_bind_type) { 2858 case FC_TGTID_BIND_BY_WWPN: 2859 if (rport->port_name == ids->port_name) 2860 match = 1; 2861 break; 2862 case FC_TGTID_BIND_BY_WWNN: 2863 if (rport->node_name == ids->node_name) 2864 match = 1; 2865 break; 2866 case FC_TGTID_BIND_BY_ID: 2867 if (rport->port_id == ids->port_id) 2868 match = 1; 2869 break; 2870 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2871 break; 2872 } 2873 2874 if (match) { 2875 list_move_tail(&rport->peers, &fc_host->rports); 2876 break; 2877 } 2878 } 2879 2880 if (match) { 2881 memcpy(&rport->node_name, &ids->node_name, 2882 sizeof(rport->node_name)); 2883 memcpy(&rport->port_name, &ids->port_name, 2884 sizeof(rport->port_name)); 2885 rport->port_id = ids->port_id; 2886 rport->roles = ids->roles; 2887 rport->port_state = FC_PORTSTATE_ONLINE; 2888 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2889 2890 if (fci->f->dd_fcrport_size) 2891 memset(rport->dd_data, 0, 2892 fci->f->dd_fcrport_size); 2893 spin_unlock_irqrestore(shost->host_lock, flags); 2894 2895 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) { 2896 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 2897 2898 /* initiate a scan of the target */ 2899 spin_lock_irqsave(shost->host_lock, flags); 2900 rport->flags |= FC_RPORT_SCAN_PENDING; 2901 scsi_queue_work(shost, &rport->scan_work); 2902 spin_unlock_irqrestore(shost->host_lock, flags); 2903 } 2904 return rport; 2905 } 2906 } 2907 2908 spin_unlock_irqrestore(shost->host_lock, flags); 2909 2910 /* No consistent binding found - create new remote port entry */ 2911 rport = fc_rport_create(shost, channel, ids); 2912 2913 return rport; 2914 } 2915 EXPORT_SYMBOL(fc_remote_port_add); 2916 2917 2918 /** 2919 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2920 * @rport: The remote port that no longer exists 2921 * 2922 * The LLDD calls this routine to notify the transport that a remote 2923 * port is no longer part of the topology. Note: Although a port 2924 * may no longer be part of the topology, it may persist in the remote 2925 * ports displayed by the fc_host. We do this under 2 conditions: 2926 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2927 * This allows the port to temporarily disappear, then reappear without 2928 * disrupting the SCSI device tree attached to it. During the "blocked" 2929 * period the port will still exist. 2930 * 2) If the port was a scsi target and disappears for longer than we 2931 * expect, we'll delete the port and the tear down the SCSI device tree 2932 * attached to it. However, we want to semi-persist the target id assigned 2933 * to that port if it eventually does exist. The port structure will 2934 * remain (although with minimal information) so that the target id 2935 * bindings remails. 2936 * 2937 * If the remote port is not an FCP Target, it will be fully torn down 2938 * and deallocated, including the fc_remote_port class device. 2939 * 2940 * If the remote port is an FCP Target, the port will be placed in a 2941 * temporary blocked state. From the LLDD's perspective, the rport no 2942 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2943 * exists, but all sdevs on it are blocked from further I/O. The following 2944 * is then expected. 2945 * 2946 * If the remote port does not return (signaled by a LLDD call to 2947 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2948 * scsi target is removed - killing all outstanding i/o and removing the 2949 * scsi devices attached ot it. The port structure will be marked Not 2950 * Present and be partially cleared, leaving only enough information to 2951 * recognize the remote port relative to the scsi target id binding if 2952 * it later appears. The port will remain as long as there is a valid 2953 * binding (e.g. until the user changes the binding type or unloads the 2954 * scsi host with the binding). 2955 * 2956 * If the remote port returns within the dev_loss_tmo value (and matches 2957 * according to the target id binding type), the port structure will be 2958 * reused. If it is no longer a SCSI target, the target will be torn 2959 * down. If it continues to be a SCSI target, then the target will be 2960 * unblocked (allowing i/o to be resumed), and a scan will be activated 2961 * to ensure that all luns are detected. 2962 * 2963 * Called from normal process context only - cannot be called from interrupt. 2964 * 2965 * Notes: 2966 * This routine assumes no locks are held on entry. 2967 */ 2968 void 2969 fc_remote_port_delete(struct fc_rport *rport) 2970 { 2971 struct Scsi_Host *shost = rport_to_shost(rport); 2972 unsigned long timeout = rport->dev_loss_tmo; 2973 unsigned long flags; 2974 2975 /* 2976 * No need to flush the fc_host work_q's, as all adds are synchronous. 2977 * 2978 * We do need to reclaim the rport scan work element, so eventually 2979 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2980 * there's still a scan pending. 2981 */ 2982 2983 spin_lock_irqsave(shost->host_lock, flags); 2984 2985 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2986 spin_unlock_irqrestore(shost->host_lock, flags); 2987 return; 2988 } 2989 2990 /* 2991 * In the past, we if this was not an FCP-Target, we would 2992 * unconditionally just jump to deleting the rport. 2993 * However, rports can be used as node containers by the LLDD, 2994 * and its not appropriate to just terminate the rport at the 2995 * first sign of a loss in connectivity. The LLDD may want to 2996 * send ELS traffic to re-validate the login. If the rport is 2997 * immediately deleted, it makes it inappropriate for a node 2998 * container. 2999 * So... we now unconditionally wait dev_loss_tmo before 3000 * destroying an rport. 3001 */ 3002 3003 rport->port_state = FC_PORTSTATE_BLOCKED; 3004 3005 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3006 3007 spin_unlock_irqrestore(shost->host_lock, flags); 3008 3009 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && 3010 shost->active_mode & MODE_TARGET) 3011 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); 3012 3013 scsi_target_block(&rport->dev); 3014 3015 /* see if we need to kill io faster than waiting for device loss */ 3016 if ((rport->fast_io_fail_tmo != -1) && 3017 (rport->fast_io_fail_tmo < timeout)) 3018 fc_queue_devloss_work(shost, &rport->fail_io_work, 3019 rport->fast_io_fail_tmo * HZ); 3020 3021 /* cap the length the devices can be blocked until they are deleted */ 3022 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3023 } 3024 EXPORT_SYMBOL(fc_remote_port_delete); 3025 3026 /** 3027 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3028 * @rport: The remote port that changed. 3029 * @roles: New roles for this port. 3030 * 3031 * Description: The LLDD calls this routine to notify the transport that the 3032 * roles on a remote port may have changed. The largest effect of this is 3033 * if a port now becomes a FCP Target, it must be allocated a 3034 * scsi target id. If the port is no longer a FCP target, any 3035 * scsi target id value assigned to it will persist in case the 3036 * role changes back to include FCP Target. No changes in the scsi 3037 * midlayer will be invoked if the role changes (in the expectation 3038 * that the role will be resumed. If it doesn't normal error processing 3039 * will take place). 3040 * 3041 * Should not be called from interrupt context. 3042 * 3043 * Notes: 3044 * This routine assumes no locks are held on entry. 3045 */ 3046 void 3047 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3048 { 3049 struct Scsi_Host *shost = rport_to_shost(rport); 3050 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3051 unsigned long flags; 3052 int create = 0; 3053 int ret; 3054 3055 spin_lock_irqsave(shost->host_lock, flags); 3056 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3057 if (rport->scsi_target_id == -1) { 3058 rport->scsi_target_id = fc_host->next_target_id++; 3059 create = 1; 3060 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3061 create = 1; 3062 } else if (shost->active_mode & MODE_TARGET) { 3063 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, 3064 (char *)&rport->node_name); 3065 if (ret) 3066 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", 3067 ret); 3068 } 3069 3070 rport->roles = roles; 3071 3072 spin_unlock_irqrestore(shost->host_lock, flags); 3073 3074 if (create) { 3075 /* 3076 * There may have been a delete timer running on the 3077 * port. Ensure that it is cancelled as we now know 3078 * the port is an FCP Target. 3079 * Note: we know the rport is exists and in an online 3080 * state as the LLDD would not have had an rport 3081 * reference to pass us. 3082 * 3083 * Take no action on the del_timer failure as the state 3084 * machine state change will validate the 3085 * transaction. 3086 */ 3087 if (!cancel_delayed_work(&rport->fail_io_work)) 3088 fc_flush_devloss(shost); 3089 if (!cancel_delayed_work(&rport->dev_loss_work)) 3090 fc_flush_devloss(shost); 3091 3092 spin_lock_irqsave(shost->host_lock, flags); 3093 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3094 FC_RPORT_DEVLOSS_PENDING | 3095 FC_RPORT_DEVLOSS_CALLBK_DONE); 3096 spin_unlock_irqrestore(shost->host_lock, flags); 3097 3098 /* ensure any stgt delete functions are done */ 3099 fc_flush_work(shost); 3100 3101 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3102 /* initiate a scan of the target */ 3103 spin_lock_irqsave(shost->host_lock, flags); 3104 rport->flags |= FC_RPORT_SCAN_PENDING; 3105 scsi_queue_work(shost, &rport->scan_work); 3106 spin_unlock_irqrestore(shost->host_lock, flags); 3107 } 3108 } 3109 EXPORT_SYMBOL(fc_remote_port_rolechg); 3110 3111 /** 3112 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3113 * @work: rport target that failed to reappear in the allotted time. 3114 * 3115 * Description: An attempt to delete a remote port blocks, and if it fails 3116 * to return in the allotted time this gets called. 3117 */ 3118 static void 3119 fc_timeout_deleted_rport(struct work_struct *work) 3120 { 3121 struct fc_rport *rport = 3122 container_of(work, struct fc_rport, dev_loss_work.work); 3123 struct Scsi_Host *shost = rport_to_shost(rport); 3124 struct fc_internal *i = to_fc_internal(shost->transportt); 3125 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3126 unsigned long flags; 3127 int do_callback = 0; 3128 3129 spin_lock_irqsave(shost->host_lock, flags); 3130 3131 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3132 3133 /* 3134 * If the port is ONLINE, then it came back. If it was a SCSI 3135 * target, validate it still is. If not, tear down the 3136 * scsi_target on it. 3137 */ 3138 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3139 (rport->scsi_target_id != -1) && 3140 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3141 dev_printk(KERN_ERR, &rport->dev, 3142 "blocked FC remote port time out: no longer" 3143 " a FCP target, removing starget\n"); 3144 spin_unlock_irqrestore(shost->host_lock, flags); 3145 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3146 fc_queue_work(shost, &rport->stgt_delete_work); 3147 return; 3148 } 3149 3150 /* NOOP state - we're flushing workq's */ 3151 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3152 spin_unlock_irqrestore(shost->host_lock, flags); 3153 dev_printk(KERN_ERR, &rport->dev, 3154 "blocked FC remote port time out: leaving" 3155 " rport%s alone\n", 3156 (rport->scsi_target_id != -1) ? " and starget" : ""); 3157 return; 3158 } 3159 3160 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3161 (rport->scsi_target_id == -1)) { 3162 list_del(&rport->peers); 3163 rport->port_state = FC_PORTSTATE_DELETED; 3164 dev_printk(KERN_ERR, &rport->dev, 3165 "blocked FC remote port time out: removing" 3166 " rport%s\n", 3167 (rport->scsi_target_id != -1) ? " and starget" : ""); 3168 fc_queue_work(shost, &rport->rport_delete_work); 3169 spin_unlock_irqrestore(shost->host_lock, flags); 3170 return; 3171 } 3172 3173 dev_printk(KERN_ERR, &rport->dev, 3174 "blocked FC remote port time out: removing target and " 3175 "saving binding\n"); 3176 3177 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3178 3179 /* 3180 * Note: We do not remove or clear the hostdata area. This allows 3181 * host-specific target data to persist along with the 3182 * scsi_target_id. It's up to the host to manage it's hostdata area. 3183 */ 3184 3185 /* 3186 * Reinitialize port attributes that may change if the port comes back. 3187 */ 3188 rport->maxframe_size = -1; 3189 rport->supported_classes = FC_COS_UNSPECIFIED; 3190 rport->roles = FC_PORT_ROLE_UNKNOWN; 3191 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3192 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3193 3194 /* 3195 * Pre-emptively kill I/O rather than waiting for the work queue 3196 * item to teardown the starget. (FCOE libFC folks prefer this 3197 * and to have the rport_port_id still set when it's done). 3198 */ 3199 spin_unlock_irqrestore(shost->host_lock, flags); 3200 fc_terminate_rport_io(rport); 3201 3202 spin_lock_irqsave(shost->host_lock, flags); 3203 3204 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3205 3206 /* remove the identifiers that aren't used in the consisting binding */ 3207 switch (fc_host->tgtid_bind_type) { 3208 case FC_TGTID_BIND_BY_WWPN: 3209 rport->node_name = -1; 3210 rport->port_id = -1; 3211 break; 3212 case FC_TGTID_BIND_BY_WWNN: 3213 rport->port_name = -1; 3214 rport->port_id = -1; 3215 break; 3216 case FC_TGTID_BIND_BY_ID: 3217 rport->node_name = -1; 3218 rport->port_name = -1; 3219 break; 3220 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3221 break; 3222 } 3223 3224 /* 3225 * As this only occurs if the remote port (scsi target) 3226 * went away and didn't come back - we'll remove 3227 * all attached scsi devices. 3228 */ 3229 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3230 fc_queue_work(shost, &rport->stgt_delete_work); 3231 3232 do_callback = 1; 3233 } 3234 3235 spin_unlock_irqrestore(shost->host_lock, flags); 3236 3237 /* 3238 * Notify the driver that the rport is now dead. The LLDD will 3239 * also guarantee that any communication to the rport is terminated 3240 * 3241 * Note: we set the CALLBK_DONE flag above to correspond 3242 */ 3243 if (do_callback && i->f->dev_loss_tmo_callbk) 3244 i->f->dev_loss_tmo_callbk(rport); 3245 } 3246 3247 3248 /** 3249 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3250 * @work: rport to terminate io on. 3251 * 3252 * Notes: Only requests the failure of the io, not that all are flushed 3253 * prior to returning. 3254 */ 3255 static void 3256 fc_timeout_fail_rport_io(struct work_struct *work) 3257 { 3258 struct fc_rport *rport = 3259 container_of(work, struct fc_rport, fail_io_work.work); 3260 3261 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3262 return; 3263 3264 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3265 fc_terminate_rport_io(rport); 3266 } 3267 3268 /** 3269 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3270 * @work: remote port to be scanned. 3271 */ 3272 static void 3273 fc_scsi_scan_rport(struct work_struct *work) 3274 { 3275 struct fc_rport *rport = 3276 container_of(work, struct fc_rport, scan_work); 3277 struct Scsi_Host *shost = rport_to_shost(rport); 3278 struct fc_internal *i = to_fc_internal(shost->transportt); 3279 unsigned long flags; 3280 3281 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3282 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3283 !(i->f->disable_target_scan)) { 3284 scsi_scan_target(&rport->dev, rport->channel, 3285 rport->scsi_target_id, SCAN_WILD_CARD, 1); 3286 } 3287 3288 spin_lock_irqsave(shost->host_lock, flags); 3289 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3290 spin_unlock_irqrestore(shost->host_lock, flags); 3291 } 3292 3293 /** 3294 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3295 * @cmnd: SCSI command that scsi_eh is trying to recover 3296 * 3297 * This routine can be called from a FC LLD scsi_eh callback. It 3298 * blocks the scsi_eh thread until the fc_rport leaves the 3299 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3300 * necessary to avoid the scsi_eh failing recovery actions for blocked 3301 * rports which would lead to offlined SCSI devices. 3302 * 3303 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3304 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3305 * passed back to scsi_eh. 3306 */ 3307 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3308 { 3309 struct Scsi_Host *shost = cmnd->device->host; 3310 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3311 unsigned long flags; 3312 3313 spin_lock_irqsave(shost->host_lock, flags); 3314 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3315 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3316 spin_unlock_irqrestore(shost->host_lock, flags); 3317 msleep(1000); 3318 spin_lock_irqsave(shost->host_lock, flags); 3319 } 3320 spin_unlock_irqrestore(shost->host_lock, flags); 3321 3322 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3323 return FAST_IO_FAIL; 3324 3325 return 0; 3326 } 3327 EXPORT_SYMBOL(fc_block_scsi_eh); 3328 3329 /** 3330 * fc_vport_setup - allocates and creates a FC virtual port. 3331 * @shost: scsi host the virtual port is connected to. 3332 * @channel: Channel on shost port connected to. 3333 * @pdev: parent device for vport 3334 * @ids: The world wide names, FC4 port roles, etc for 3335 * the virtual port. 3336 * @ret_vport: The pointer to the created vport. 3337 * 3338 * Allocates and creates the vport structure, calls the parent host 3339 * to instantiate the vport, the completes w/ class and sysfs creation. 3340 * 3341 * Notes: 3342 * This routine assumes no locks are held on entry. 3343 */ 3344 static int 3345 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3346 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3347 { 3348 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3349 struct fc_internal *fci = to_fc_internal(shost->transportt); 3350 struct fc_vport *vport; 3351 struct device *dev; 3352 unsigned long flags; 3353 size_t size; 3354 int error; 3355 3356 *ret_vport = NULL; 3357 3358 if ( ! fci->f->vport_create) 3359 return -ENOENT; 3360 3361 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3362 vport = kzalloc(size, GFP_KERNEL); 3363 if (unlikely(!vport)) { 3364 printk(KERN_ERR "%s: allocation failure\n", __func__); 3365 return -ENOMEM; 3366 } 3367 3368 vport->vport_state = FC_VPORT_UNKNOWN; 3369 vport->vport_last_state = FC_VPORT_UNKNOWN; 3370 vport->node_name = ids->node_name; 3371 vport->port_name = ids->port_name; 3372 vport->roles = ids->roles; 3373 vport->vport_type = ids->vport_type; 3374 if (fci->f->dd_fcvport_size) 3375 vport->dd_data = &vport[1]; 3376 vport->shost = shost; 3377 vport->channel = channel; 3378 vport->flags = FC_VPORT_CREATING; 3379 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3380 3381 spin_lock_irqsave(shost->host_lock, flags); 3382 3383 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3384 spin_unlock_irqrestore(shost->host_lock, flags); 3385 kfree(vport); 3386 return -ENOSPC; 3387 } 3388 fc_host->npiv_vports_inuse++; 3389 vport->number = fc_host->next_vport_number++; 3390 list_add_tail(&vport->peers, &fc_host->vports); 3391 get_device(&shost->shost_gendev); /* for fc_host->vport list */ 3392 3393 spin_unlock_irqrestore(shost->host_lock, flags); 3394 3395 dev = &vport->dev; 3396 device_initialize(dev); /* takes self reference */ 3397 dev->parent = get_device(pdev); /* takes parent reference */ 3398 dev->release = fc_vport_dev_release; 3399 dev_set_name(dev, "vport-%d:%d-%d", 3400 shost->host_no, channel, vport->number); 3401 transport_setup_device(dev); 3402 3403 error = device_add(dev); 3404 if (error) { 3405 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3406 goto delete_vport; 3407 } 3408 transport_add_device(dev); 3409 transport_configure_device(dev); 3410 3411 error = fci->f->vport_create(vport, ids->disable); 3412 if (error) { 3413 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3414 goto delete_vport_all; 3415 } 3416 3417 /* 3418 * if the parent isn't the physical adapter's Scsi_Host, ensure 3419 * the Scsi_Host at least contains ia symlink to the vport. 3420 */ 3421 if (pdev != &shost->shost_gendev) { 3422 error = sysfs_create_link(&shost->shost_gendev.kobj, 3423 &dev->kobj, dev_name(dev)); 3424 if (error) 3425 printk(KERN_ERR 3426 "%s: Cannot create vport symlinks for " 3427 "%s, err=%d\n", 3428 __func__, dev_name(dev), error); 3429 } 3430 spin_lock_irqsave(shost->host_lock, flags); 3431 vport->flags &= ~FC_VPORT_CREATING; 3432 spin_unlock_irqrestore(shost->host_lock, flags); 3433 3434 dev_printk(KERN_NOTICE, pdev, 3435 "%s created via shost%d channel %d\n", dev_name(dev), 3436 shost->host_no, channel); 3437 3438 *ret_vport = vport; 3439 3440 return 0; 3441 3442 delete_vport_all: 3443 transport_remove_device(dev); 3444 device_del(dev); 3445 delete_vport: 3446 transport_destroy_device(dev); 3447 spin_lock_irqsave(shost->host_lock, flags); 3448 list_del(&vport->peers); 3449 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3450 fc_host->npiv_vports_inuse--; 3451 spin_unlock_irqrestore(shost->host_lock, flags); 3452 put_device(dev->parent); 3453 kfree(vport); 3454 3455 return error; 3456 } 3457 3458 /** 3459 * fc_vport_create - Admin App or LLDD requests creation of a vport 3460 * @shost: scsi host the virtual port is connected to. 3461 * @channel: channel on shost port connected to. 3462 * @ids: The world wide names, FC4 port roles, etc for 3463 * the virtual port. 3464 * 3465 * Notes: 3466 * This routine assumes no locks are held on entry. 3467 */ 3468 struct fc_vport * 3469 fc_vport_create(struct Scsi_Host *shost, int channel, 3470 struct fc_vport_identifiers *ids) 3471 { 3472 int stat; 3473 struct fc_vport *vport; 3474 3475 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3476 ids, &vport); 3477 return stat ? NULL : vport; 3478 } 3479 EXPORT_SYMBOL(fc_vport_create); 3480 3481 /** 3482 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3483 * @vport: fc_vport to be terminated 3484 * 3485 * Calls the LLDD vport_delete() function, then deallocates and removes 3486 * the vport from the shost and object tree. 3487 * 3488 * Notes: 3489 * This routine assumes no locks are held on entry. 3490 */ 3491 int 3492 fc_vport_terminate(struct fc_vport *vport) 3493 { 3494 struct Scsi_Host *shost = vport_to_shost(vport); 3495 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3496 struct fc_internal *i = to_fc_internal(shost->transportt); 3497 struct device *dev = &vport->dev; 3498 unsigned long flags; 3499 int stat; 3500 3501 if (i->f->vport_delete) 3502 stat = i->f->vport_delete(vport); 3503 else 3504 stat = -ENOENT; 3505 3506 spin_lock_irqsave(shost->host_lock, flags); 3507 vport->flags &= ~FC_VPORT_DELETING; 3508 if (!stat) { 3509 vport->flags |= FC_VPORT_DELETED; 3510 list_del(&vport->peers); 3511 fc_host->npiv_vports_inuse--; 3512 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3513 } 3514 spin_unlock_irqrestore(shost->host_lock, flags); 3515 3516 if (stat) 3517 return stat; 3518 3519 if (dev->parent != &shost->shost_gendev) 3520 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3521 transport_remove_device(dev); 3522 device_del(dev); 3523 transport_destroy_device(dev); 3524 3525 /* 3526 * Removing our self-reference should mean our 3527 * release function gets called, which will drop the remaining 3528 * parent reference and free the data structure. 3529 */ 3530 put_device(dev); /* for self-reference */ 3531 3532 return 0; /* SUCCESS */ 3533 } 3534 EXPORT_SYMBOL(fc_vport_terminate); 3535 3536 /** 3537 * fc_vport_sched_delete - workq-based delete request for a vport 3538 * @work: vport to be deleted. 3539 */ 3540 static void 3541 fc_vport_sched_delete(struct work_struct *work) 3542 { 3543 struct fc_vport *vport = 3544 container_of(work, struct fc_vport, vport_delete_work); 3545 int stat; 3546 3547 stat = fc_vport_terminate(vport); 3548 if (stat) 3549 dev_printk(KERN_ERR, vport->dev.parent, 3550 "%s: %s could not be deleted created via " 3551 "shost%d channel %d - error %d\n", __func__, 3552 dev_name(&vport->dev), vport->shost->host_no, 3553 vport->channel, stat); 3554 } 3555 3556 3557 /* 3558 * BSG support 3559 */ 3560 3561 3562 /** 3563 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job 3564 * @job: fc_bsg_job that is to be torn down 3565 */ 3566 static void 3567 fc_destroy_bsgjob(struct fc_bsg_job *job) 3568 { 3569 unsigned long flags; 3570 3571 spin_lock_irqsave(&job->job_lock, flags); 3572 if (job->ref_cnt) { 3573 spin_unlock_irqrestore(&job->job_lock, flags); 3574 return; 3575 } 3576 spin_unlock_irqrestore(&job->job_lock, flags); 3577 3578 put_device(job->dev); /* release reference for the request */ 3579 3580 kfree(job->request_payload.sg_list); 3581 kfree(job->reply_payload.sg_list); 3582 kfree(job); 3583 } 3584 3585 /** 3586 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has 3587 * completed 3588 * @job: fc_bsg_job that is complete 3589 */ 3590 static void 3591 fc_bsg_jobdone(struct fc_bsg_job *job) 3592 { 3593 struct request *req = job->req; 3594 struct request *rsp = req->next_rq; 3595 int err; 3596 3597 err = job->req->errors = job->reply->result; 3598 3599 if (err < 0) 3600 /* we're only returning the result field in the reply */ 3601 job->req->sense_len = sizeof(uint32_t); 3602 else 3603 job->req->sense_len = job->reply_len; 3604 3605 /* we assume all request payload was transferred, residual == 0 */ 3606 req->resid_len = 0; 3607 3608 if (rsp) { 3609 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); 3610 3611 /* set reply (bidi) residual */ 3612 rsp->resid_len -= min(job->reply->reply_payload_rcv_len, 3613 rsp->resid_len); 3614 } 3615 blk_complete_request(req); 3616 } 3617 3618 /** 3619 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests 3620 * @rq: BSG request that holds the job to be destroyed 3621 */ 3622 static void fc_bsg_softirq_done(struct request *rq) 3623 { 3624 struct fc_bsg_job *job = rq->special; 3625 unsigned long flags; 3626 3627 spin_lock_irqsave(&job->job_lock, flags); 3628 job->state_flags |= FC_RQST_STATE_DONE; 3629 job->ref_cnt--; 3630 spin_unlock_irqrestore(&job->job_lock, flags); 3631 3632 blk_end_request_all(rq, rq->errors); 3633 fc_destroy_bsgjob(job); 3634 } 3635 3636 /** 3637 * fc_bsg_job_timeout - handler for when a bsg request timesout 3638 * @req: request that timed out 3639 */ 3640 static enum blk_eh_timer_return 3641 fc_bsg_job_timeout(struct request *req) 3642 { 3643 struct fc_bsg_job *job = (void *) req->special; 3644 struct Scsi_Host *shost = job->shost; 3645 struct fc_internal *i = to_fc_internal(shost->transportt); 3646 unsigned long flags; 3647 int err = 0, done = 0; 3648 3649 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) 3650 return BLK_EH_RESET_TIMER; 3651 3652 spin_lock_irqsave(&job->job_lock, flags); 3653 if (job->state_flags & FC_RQST_STATE_DONE) 3654 done = 1; 3655 else 3656 job->ref_cnt++; 3657 spin_unlock_irqrestore(&job->job_lock, flags); 3658 3659 if (!done && i->f->bsg_timeout) { 3660 /* call LLDD to abort the i/o as it has timed out */ 3661 err = i->f->bsg_timeout(job); 3662 if (err == -EAGAIN) { 3663 job->ref_cnt--; 3664 return BLK_EH_RESET_TIMER; 3665 } else if (err) 3666 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3667 "abort failed with status %d\n", err); 3668 } 3669 3670 /* the blk_end_sync_io() doesn't check the error */ 3671 if (done) 3672 return BLK_EH_NOT_HANDLED; 3673 else 3674 return BLK_EH_HANDLED; 3675 } 3676 3677 static int 3678 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) 3679 { 3680 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); 3681 3682 BUG_ON(!req->nr_phys_segments); 3683 3684 buf->sg_list = kzalloc(sz, GFP_KERNEL); 3685 if (!buf->sg_list) 3686 return -ENOMEM; 3687 sg_init_table(buf->sg_list, req->nr_phys_segments); 3688 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); 3689 buf->payload_len = blk_rq_bytes(req); 3690 return 0; 3691 } 3692 3693 3694 /** 3695 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the 3696 * bsg request 3697 * @shost: SCSI Host corresponding to the bsg object 3698 * @rport: (optional) FC Remote Port corresponding to the bsg object 3699 * @req: BSG request that needs a job structure 3700 */ 3701 static int 3702 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, 3703 struct request *req) 3704 { 3705 struct fc_internal *i = to_fc_internal(shost->transportt); 3706 struct request *rsp = req->next_rq; 3707 struct fc_bsg_job *job; 3708 int ret; 3709 3710 BUG_ON(req->special); 3711 3712 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, 3713 GFP_KERNEL); 3714 if (!job) 3715 return -ENOMEM; 3716 3717 /* 3718 * Note: this is a bit silly. 3719 * The request gets formatted as a SGIO v4 ioctl request, which 3720 * then gets reformatted as a blk request, which then gets 3721 * reformatted as a fc bsg request. And on completion, we have 3722 * to wrap return results such that SGIO v4 thinks it was a scsi 3723 * status. I hope this was all worth it. 3724 */ 3725 3726 req->special = job; 3727 job->shost = shost; 3728 job->rport = rport; 3729 job->req = req; 3730 if (i->f->dd_bsg_size) 3731 job->dd_data = (void *)&job[1]; 3732 spin_lock_init(&job->job_lock); 3733 job->request = (struct fc_bsg_request *)req->cmd; 3734 job->request_len = req->cmd_len; 3735 job->reply = req->sense; 3736 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer 3737 * allocated */ 3738 if (req->bio) { 3739 ret = fc_bsg_map_buffer(&job->request_payload, req); 3740 if (ret) 3741 goto failjob_rls_job; 3742 } 3743 if (rsp && rsp->bio) { 3744 ret = fc_bsg_map_buffer(&job->reply_payload, rsp); 3745 if (ret) 3746 goto failjob_rls_rqst_payload; 3747 } 3748 job->job_done = fc_bsg_jobdone; 3749 if (rport) 3750 job->dev = &rport->dev; 3751 else 3752 job->dev = &shost->shost_gendev; 3753 get_device(job->dev); /* take a reference for the request */ 3754 3755 job->ref_cnt = 1; 3756 3757 return 0; 3758 3759 3760 failjob_rls_rqst_payload: 3761 kfree(job->request_payload.sg_list); 3762 failjob_rls_job: 3763 kfree(job); 3764 return -ENOMEM; 3765 } 3766 3767 3768 enum fc_dispatch_result { 3769 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ 3770 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ 3771 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ 3772 }; 3773 3774 3775 /** 3776 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3777 * @q: fc host request queue 3778 * @shost: scsi host rport attached to 3779 * @job: bsg job to be processed 3780 */ 3781 static enum fc_dispatch_result 3782 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3783 struct fc_bsg_job *job) 3784 { 3785 struct fc_internal *i = to_fc_internal(shost->transportt); 3786 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3787 int ret; 3788 3789 /* Validate the host command */ 3790 switch (job->request->msgcode) { 3791 case FC_BSG_HST_ADD_RPORT: 3792 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3793 break; 3794 3795 case FC_BSG_HST_DEL_RPORT: 3796 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3797 break; 3798 3799 case FC_BSG_HST_ELS_NOLOGIN: 3800 cmdlen += sizeof(struct fc_bsg_host_els); 3801 /* there better be a xmt and rcv payloads */ 3802 if ((!job->request_payload.payload_len) || 3803 (!job->reply_payload.payload_len)) { 3804 ret = -EINVAL; 3805 goto fail_host_msg; 3806 } 3807 break; 3808 3809 case FC_BSG_HST_CT: 3810 cmdlen += sizeof(struct fc_bsg_host_ct); 3811 /* there better be xmt and rcv payloads */ 3812 if ((!job->request_payload.payload_len) || 3813 (!job->reply_payload.payload_len)) { 3814 ret = -EINVAL; 3815 goto fail_host_msg; 3816 } 3817 break; 3818 3819 case FC_BSG_HST_VENDOR: 3820 cmdlen += sizeof(struct fc_bsg_host_vendor); 3821 if ((shost->hostt->vendor_id == 0L) || 3822 (job->request->rqst_data.h_vendor.vendor_id != 3823 shost->hostt->vendor_id)) { 3824 ret = -ESRCH; 3825 goto fail_host_msg; 3826 } 3827 break; 3828 3829 default: 3830 ret = -EBADR; 3831 goto fail_host_msg; 3832 } 3833 3834 /* check if we really have all the request data needed */ 3835 if (job->request_len < cmdlen) { 3836 ret = -ENOMSG; 3837 goto fail_host_msg; 3838 } 3839 3840 ret = i->f->bsg_request(job); 3841 if (!ret) 3842 return FC_DISPATCH_UNLOCKED; 3843 3844 fail_host_msg: 3845 /* return the errno failure code as the only status */ 3846 BUG_ON(job->reply_len < sizeof(uint32_t)); 3847 job->reply->reply_payload_rcv_len = 0; 3848 job->reply->result = ret; 3849 job->reply_len = sizeof(uint32_t); 3850 fc_bsg_jobdone(job); 3851 return FC_DISPATCH_UNLOCKED; 3852 } 3853 3854 3855 /* 3856 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3857 * @rport: rport to be restarted 3858 */ 3859 static void 3860 fc_bsg_goose_queue(struct fc_rport *rport) 3861 { 3862 if (!rport->rqst_q) 3863 return; 3864 3865 /* 3866 * This get/put dance makes no sense 3867 */ 3868 get_device(&rport->dev); 3869 blk_run_queue_async(rport->rqst_q); 3870 put_device(&rport->dev); 3871 } 3872 3873 /** 3874 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3875 * @q: rport request queue 3876 * @shost: scsi host rport attached to 3877 * @rport: rport request destined to 3878 * @job: bsg job to be processed 3879 */ 3880 static enum fc_dispatch_result 3881 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3882 struct fc_rport *rport, struct fc_bsg_job *job) 3883 { 3884 struct fc_internal *i = to_fc_internal(shost->transportt); 3885 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3886 int ret; 3887 3888 /* Validate the rport command */ 3889 switch (job->request->msgcode) { 3890 case FC_BSG_RPT_ELS: 3891 cmdlen += sizeof(struct fc_bsg_rport_els); 3892 goto check_bidi; 3893 3894 case FC_BSG_RPT_CT: 3895 cmdlen += sizeof(struct fc_bsg_rport_ct); 3896 check_bidi: 3897 /* there better be xmt and rcv payloads */ 3898 if ((!job->request_payload.payload_len) || 3899 (!job->reply_payload.payload_len)) { 3900 ret = -EINVAL; 3901 goto fail_rport_msg; 3902 } 3903 break; 3904 default: 3905 ret = -EBADR; 3906 goto fail_rport_msg; 3907 } 3908 3909 /* check if we really have all the request data needed */ 3910 if (job->request_len < cmdlen) { 3911 ret = -ENOMSG; 3912 goto fail_rport_msg; 3913 } 3914 3915 ret = i->f->bsg_request(job); 3916 if (!ret) 3917 return FC_DISPATCH_UNLOCKED; 3918 3919 fail_rport_msg: 3920 /* return the errno failure code as the only status */ 3921 BUG_ON(job->reply_len < sizeof(uint32_t)); 3922 job->reply->reply_payload_rcv_len = 0; 3923 job->reply->result = ret; 3924 job->reply_len = sizeof(uint32_t); 3925 fc_bsg_jobdone(job); 3926 return FC_DISPATCH_UNLOCKED; 3927 } 3928 3929 3930 /** 3931 * fc_bsg_request_handler - generic handler for bsg requests 3932 * @q: request queue to manage 3933 * @shost: Scsi_Host related to the bsg object 3934 * @rport: FC remote port related to the bsg object (optional) 3935 * @dev: device structure for bsg object 3936 */ 3937 static void 3938 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, 3939 struct fc_rport *rport, struct device *dev) 3940 { 3941 struct request *req; 3942 struct fc_bsg_job *job; 3943 enum fc_dispatch_result ret; 3944 3945 if (!get_device(dev)) 3946 return; 3947 3948 while (1) { 3949 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && 3950 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3951 break; 3952 3953 req = blk_fetch_request(q); 3954 if (!req) 3955 break; 3956 3957 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { 3958 req->errors = -ENXIO; 3959 spin_unlock_irq(q->queue_lock); 3960 blk_end_request_all(req, -ENXIO); 3961 spin_lock_irq(q->queue_lock); 3962 continue; 3963 } 3964 3965 spin_unlock_irq(q->queue_lock); 3966 3967 ret = fc_req_to_bsgjob(shost, rport, req); 3968 if (ret) { 3969 req->errors = ret; 3970 blk_end_request_all(req, ret); 3971 spin_lock_irq(q->queue_lock); 3972 continue; 3973 } 3974 3975 job = req->special; 3976 3977 /* check if we have the msgcode value at least */ 3978 if (job->request_len < sizeof(uint32_t)) { 3979 BUG_ON(job->reply_len < sizeof(uint32_t)); 3980 job->reply->reply_payload_rcv_len = 0; 3981 job->reply->result = -ENOMSG; 3982 job->reply_len = sizeof(uint32_t); 3983 fc_bsg_jobdone(job); 3984 spin_lock_irq(q->queue_lock); 3985 continue; 3986 } 3987 3988 /* the dispatch routines will unlock the queue_lock */ 3989 if (rport) 3990 ret = fc_bsg_rport_dispatch(q, shost, rport, job); 3991 else 3992 ret = fc_bsg_host_dispatch(q, shost, job); 3993 3994 /* did dispatcher hit state that can't process any more */ 3995 if (ret == FC_DISPATCH_BREAK) 3996 break; 3997 3998 /* did dispatcher had released the lock */ 3999 if (ret == FC_DISPATCH_UNLOCKED) 4000 spin_lock_irq(q->queue_lock); 4001 } 4002 4003 spin_unlock_irq(q->queue_lock); 4004 put_device(dev); 4005 spin_lock_irq(q->queue_lock); 4006 } 4007 4008 4009 /** 4010 * fc_bsg_host_handler - handler for bsg requests for a fc host 4011 * @q: fc host request queue 4012 */ 4013 static void 4014 fc_bsg_host_handler(struct request_queue *q) 4015 { 4016 struct Scsi_Host *shost = q->queuedata; 4017 4018 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); 4019 } 4020 4021 4022 /** 4023 * fc_bsg_rport_handler - handler for bsg requests for a fc rport 4024 * @q: rport request queue 4025 */ 4026 static void 4027 fc_bsg_rport_handler(struct request_queue *q) 4028 { 4029 struct fc_rport *rport = q->queuedata; 4030 struct Scsi_Host *shost = rport_to_shost(rport); 4031 4032 fc_bsg_request_handler(q, shost, rport, &rport->dev); 4033 } 4034 4035 4036 /** 4037 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4038 * @shost: shost for fc_host 4039 * @fc_host: fc_host adding the structures to 4040 */ 4041 static int 4042 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4043 { 4044 struct device *dev = &shost->shost_gendev; 4045 struct fc_internal *i = to_fc_internal(shost->transportt); 4046 struct request_queue *q; 4047 int err; 4048 char bsg_name[20]; 4049 4050 fc_host->rqst_q = NULL; 4051 4052 if (!i->f->bsg_request) 4053 return -ENOTSUPP; 4054 4055 snprintf(bsg_name, sizeof(bsg_name), 4056 "fc_host%d", shost->host_no); 4057 4058 q = __scsi_alloc_queue(shost, fc_bsg_host_handler); 4059 if (!q) { 4060 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4061 "initialize - no request queue\n", 4062 shost->host_no); 4063 return -ENOMEM; 4064 } 4065 4066 q->queuedata = shost; 4067 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4068 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4069 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4070 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4071 4072 err = bsg_register_queue(q, dev, bsg_name, NULL); 4073 if (err) { 4074 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4075 "initialize - register queue\n", 4076 shost->host_no); 4077 blk_cleanup_queue(q); 4078 return err; 4079 } 4080 4081 fc_host->rqst_q = q; 4082 return 0; 4083 } 4084 4085 4086 /** 4087 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4088 * @shost: shost that rport is attached to 4089 * @rport: rport that the bsg hooks are being attached to 4090 */ 4091 static int 4092 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4093 { 4094 struct device *dev = &rport->dev; 4095 struct fc_internal *i = to_fc_internal(shost->transportt); 4096 struct request_queue *q; 4097 int err; 4098 4099 rport->rqst_q = NULL; 4100 4101 if (!i->f->bsg_request) 4102 return -ENOTSUPP; 4103 4104 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); 4105 if (!q) { 4106 printk(KERN_ERR "%s: bsg interface failed to " 4107 "initialize - no request queue\n", 4108 dev->kobj.name); 4109 return -ENOMEM; 4110 } 4111 4112 q->queuedata = rport; 4113 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4114 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4115 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4116 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4117 4118 err = bsg_register_queue(q, dev, NULL, NULL); 4119 if (err) { 4120 printk(KERN_ERR "%s: bsg interface failed to " 4121 "initialize - register queue\n", 4122 dev->kobj.name); 4123 blk_cleanup_queue(q); 4124 return err; 4125 } 4126 4127 rport->rqst_q = q; 4128 return 0; 4129 } 4130 4131 4132 /** 4133 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4134 * @q: the request_queue that is to be torn down. 4135 * 4136 * Notes: 4137 * Before unregistering the queue empty any requests that are blocked 4138 * 4139 * 4140 */ 4141 static void 4142 fc_bsg_remove(struct request_queue *q) 4143 { 4144 if (q) { 4145 bsg_unregister_queue(q); 4146 blk_cleanup_queue(q); 4147 } 4148 } 4149 4150 4151 /* Original Author: Martin Hicks */ 4152 MODULE_AUTHOR("James Smart"); 4153 MODULE_DESCRIPTION("FC Transport Attributes"); 4154 MODULE_LICENSE("GPL"); 4155 4156 module_init(fc_transport_init); 4157 module_exit(fc_transport_exit); 4158