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_32GBIT, "32 Gbit" }, 265 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 266 }; 267 fc_bitfield_name_search(port_speed, fc_port_speed_names) 268 269 270 static int 271 show_fc_fc4s (char *buf, u8 *fc4_list) 272 { 273 int i, len=0; 274 275 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 276 len += sprintf(buf + len , "0x%02x ", *fc4_list); 277 len += sprintf(buf + len, "\n"); 278 return len; 279 } 280 281 282 /* Convert FC_PORT_ROLE bit values to ascii string name */ 283 static const struct { 284 u32 value; 285 char *name; 286 } fc_port_role_names[] = { 287 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 288 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 289 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 290 }; 291 fc_bitfield_name_search(port_roles, fc_port_role_names) 292 293 /* 294 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 295 */ 296 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 297 #define FC_WELLKNOWN_ROLE_MASK 0x00000f 298 #define FC_FPORT_PORTID 0x00000e 299 #define FC_FABCTLR_PORTID 0x00000d 300 #define FC_DIRSRVR_PORTID 0x00000c 301 #define FC_TIMESRVR_PORTID 0x00000b 302 #define FC_MGMTSRVR_PORTID 0x00000a 303 304 305 static void fc_timeout_deleted_rport(struct work_struct *work); 306 static void fc_timeout_fail_rport_io(struct work_struct *work); 307 static void fc_scsi_scan_rport(struct work_struct *work); 308 309 /* 310 * Attribute counts pre object type... 311 * Increase these values if you add attributes 312 */ 313 #define FC_STARGET_NUM_ATTRS 3 314 #define FC_RPORT_NUM_ATTRS 10 315 #define FC_VPORT_NUM_ATTRS 9 316 #define FC_HOST_NUM_ATTRS 29 317 318 struct fc_internal { 319 struct scsi_transport_template t; 320 struct fc_function_template *f; 321 322 /* 323 * For attributes : each object has : 324 * An array of the actual attributes structures 325 * An array of null-terminated pointers to the attribute 326 * structures - used for mid-layer interaction. 327 * 328 * The attribute containers for the starget and host are are 329 * part of the midlayer. As the remote port is specific to the 330 * fc transport, we must provide the attribute container. 331 */ 332 struct device_attribute private_starget_attrs[ 333 FC_STARGET_NUM_ATTRS]; 334 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 335 336 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 337 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 338 339 struct transport_container rport_attr_cont; 340 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 341 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 342 343 struct transport_container vport_attr_cont; 344 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 345 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 346 }; 347 348 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 349 350 static int fc_target_setup(struct transport_container *tc, struct device *dev, 351 struct device *cdev) 352 { 353 struct scsi_target *starget = to_scsi_target(dev); 354 struct fc_rport *rport = starget_to_rport(starget); 355 356 /* 357 * if parent is remote port, use values from remote port. 358 * Otherwise, this host uses the fc_transport, but not the 359 * remote port interface. As such, initialize to known non-values. 360 */ 361 if (rport) { 362 fc_starget_node_name(starget) = rport->node_name; 363 fc_starget_port_name(starget) = rport->port_name; 364 fc_starget_port_id(starget) = rport->port_id; 365 } else { 366 fc_starget_node_name(starget) = -1; 367 fc_starget_port_name(starget) = -1; 368 fc_starget_port_id(starget) = -1; 369 } 370 371 return 0; 372 } 373 374 static DECLARE_TRANSPORT_CLASS(fc_transport_class, 375 "fc_transport", 376 fc_target_setup, 377 NULL, 378 NULL); 379 380 static int fc_host_setup(struct transport_container *tc, struct device *dev, 381 struct device *cdev) 382 { 383 struct Scsi_Host *shost = dev_to_shost(dev); 384 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 385 386 /* 387 * Set default values easily detected by the midlayer as 388 * failure cases. The scsi lldd is responsible for initializing 389 * all transport attributes to valid values per host. 390 */ 391 fc_host->node_name = -1; 392 fc_host->port_name = -1; 393 fc_host->permanent_port_name = -1; 394 fc_host->supported_classes = FC_COS_UNSPECIFIED; 395 memset(fc_host->supported_fc4s, 0, 396 sizeof(fc_host->supported_fc4s)); 397 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 398 fc_host->maxframe_size = -1; 399 fc_host->max_npiv_vports = 0; 400 memset(fc_host->serial_number, 0, 401 sizeof(fc_host->serial_number)); 402 memset(fc_host->manufacturer, 0, 403 sizeof(fc_host->manufacturer)); 404 memset(fc_host->model, 0, 405 sizeof(fc_host->model)); 406 memset(fc_host->model_description, 0, 407 sizeof(fc_host->model_description)); 408 memset(fc_host->hardware_version, 0, 409 sizeof(fc_host->hardware_version)); 410 memset(fc_host->driver_version, 0, 411 sizeof(fc_host->driver_version)); 412 memset(fc_host->firmware_version, 0, 413 sizeof(fc_host->firmware_version)); 414 memset(fc_host->optionrom_version, 0, 415 sizeof(fc_host->optionrom_version)); 416 417 fc_host->port_id = -1; 418 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 419 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 420 memset(fc_host->active_fc4s, 0, 421 sizeof(fc_host->active_fc4s)); 422 fc_host->speed = FC_PORTSPEED_UNKNOWN; 423 fc_host->fabric_name = -1; 424 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 425 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 426 427 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 428 429 INIT_LIST_HEAD(&fc_host->rports); 430 INIT_LIST_HEAD(&fc_host->rport_bindings); 431 INIT_LIST_HEAD(&fc_host->vports); 432 fc_host->next_rport_number = 0; 433 fc_host->next_target_id = 0; 434 fc_host->next_vport_number = 0; 435 fc_host->npiv_vports_inuse = 0; 436 437 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 438 "fc_wq_%d", shost->host_no); 439 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); 440 if (!fc_host->work_q) 441 return -ENOMEM; 442 443 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 444 snprintf(fc_host->devloss_work_q_name, 445 sizeof(fc_host->devloss_work_q_name), 446 "fc_dl_%d", shost->host_no); 447 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, 448 fc_host->devloss_work_q_name); 449 if (!fc_host->devloss_work_q) { 450 destroy_workqueue(fc_host->work_q); 451 fc_host->work_q = NULL; 452 return -ENOMEM; 453 } 454 455 fc_bsg_hostadd(shost, fc_host); 456 /* ignore any bsg add error - we just can't do sgio */ 457 458 return 0; 459 } 460 461 static int fc_host_remove(struct transport_container *tc, struct device *dev, 462 struct device *cdev) 463 { 464 struct Scsi_Host *shost = dev_to_shost(dev); 465 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 466 467 fc_bsg_remove(fc_host->rqst_q); 468 return 0; 469 } 470 471 static DECLARE_TRANSPORT_CLASS(fc_host_class, 472 "fc_host", 473 fc_host_setup, 474 fc_host_remove, 475 NULL); 476 477 /* 478 * Setup and Remove actions for remote ports are handled 479 * in the service functions below. 480 */ 481 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 482 "fc_remote_ports", 483 NULL, 484 NULL, 485 NULL); 486 487 /* 488 * Setup and Remove actions for virtual ports are handled 489 * in the service functions below. 490 */ 491 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 492 "fc_vports", 493 NULL, 494 NULL, 495 NULL); 496 497 /* 498 * Netlink Infrastructure 499 */ 500 501 static atomic_t fc_event_seq; 502 503 /** 504 * fc_get_event_number - Obtain the next sequential FC event number 505 * 506 * Notes: 507 * We could have inlined this, but it would have required fc_event_seq to 508 * be exposed. For now, live with the subroutine call. 509 * Atomic used to avoid lock/unlock... 510 */ 511 u32 512 fc_get_event_number(void) 513 { 514 return atomic_add_return(1, &fc_event_seq); 515 } 516 EXPORT_SYMBOL(fc_get_event_number); 517 518 519 /** 520 * fc_host_post_event - called to post an even on an fc_host. 521 * @shost: host the event occurred on 522 * @event_number: fc event number obtained from get_fc_event_number() 523 * @event_code: fc_host event being posted 524 * @event_data: 32bits of data for the event being posted 525 * 526 * Notes: 527 * This routine assumes no locks are held on entry. 528 */ 529 void 530 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 531 enum fc_host_event_code event_code, u32 event_data) 532 { 533 struct sk_buff *skb; 534 struct nlmsghdr *nlh; 535 struct fc_nl_event *event; 536 const char *name; 537 u32 len; 538 int err; 539 540 if (!scsi_nl_sock) { 541 err = -ENOENT; 542 goto send_fail; 543 } 544 545 len = FC_NL_MSGALIGN(sizeof(*event)); 546 547 skb = nlmsg_new(len, GFP_KERNEL); 548 if (!skb) { 549 err = -ENOBUFS; 550 goto send_fail; 551 } 552 553 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 554 if (!nlh) { 555 err = -ENOBUFS; 556 goto send_fail_skb; 557 } 558 event = nlmsg_data(nlh); 559 560 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 561 FC_NL_ASYNC_EVENT, len); 562 event->seconds = get_seconds(); 563 event->vendor_id = 0; 564 event->host_no = shost->host_no; 565 event->event_datalen = sizeof(u32); /* bytes */ 566 event->event_num = event_number; 567 event->event_code = event_code; 568 event->event_data = event_data; 569 570 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 571 GFP_KERNEL); 572 return; 573 574 send_fail_skb: 575 kfree_skb(skb); 576 send_fail: 577 name = get_fc_host_event_code_name(event_code); 578 printk(KERN_WARNING 579 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 580 __func__, shost->host_no, 581 (name) ? name : "<unknown>", event_data, err); 582 return; 583 } 584 EXPORT_SYMBOL(fc_host_post_event); 585 586 587 /** 588 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host 589 * @shost: host the event occurred on 590 * @event_number: fc event number obtained from get_fc_event_number() 591 * @data_len: amount, in bytes, of vendor unique data 592 * @data_buf: pointer to vendor unique data 593 * @vendor_id: Vendor id 594 * 595 * Notes: 596 * This routine assumes no locks are held on entry. 597 */ 598 void 599 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 600 u32 data_len, char * data_buf, u64 vendor_id) 601 { 602 struct sk_buff *skb; 603 struct nlmsghdr *nlh; 604 struct fc_nl_event *event; 605 u32 len; 606 int err; 607 608 if (!scsi_nl_sock) { 609 err = -ENOENT; 610 goto send_vendor_fail; 611 } 612 613 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 614 615 skb = nlmsg_new(len, GFP_KERNEL); 616 if (!skb) { 617 err = -ENOBUFS; 618 goto send_vendor_fail; 619 } 620 621 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 622 if (!nlh) { 623 err = -ENOBUFS; 624 goto send_vendor_fail_skb; 625 } 626 event = nlmsg_data(nlh); 627 628 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 629 FC_NL_ASYNC_EVENT, len); 630 event->seconds = get_seconds(); 631 event->vendor_id = vendor_id; 632 event->host_no = shost->host_no; 633 event->event_datalen = data_len; /* bytes */ 634 event->event_num = event_number; 635 event->event_code = FCH_EVT_VENDOR_UNIQUE; 636 memcpy(&event->event_data, data_buf, data_len); 637 638 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 639 GFP_KERNEL); 640 return; 641 642 send_vendor_fail_skb: 643 kfree_skb(skb); 644 send_vendor_fail: 645 printk(KERN_WARNING 646 "%s: Dropped Event : host %d vendor_unique - err %d\n", 647 __func__, shost->host_no, err); 648 return; 649 } 650 EXPORT_SYMBOL(fc_host_post_vendor_event); 651 652 653 654 static __init int fc_transport_init(void) 655 { 656 int error; 657 658 atomic_set(&fc_event_seq, 0); 659 660 error = transport_class_register(&fc_host_class); 661 if (error) 662 return error; 663 error = transport_class_register(&fc_vport_class); 664 if (error) 665 goto unreg_host_class; 666 error = transport_class_register(&fc_rport_class); 667 if (error) 668 goto unreg_vport_class; 669 error = transport_class_register(&fc_transport_class); 670 if (error) 671 goto unreg_rport_class; 672 return 0; 673 674 unreg_rport_class: 675 transport_class_unregister(&fc_rport_class); 676 unreg_vport_class: 677 transport_class_unregister(&fc_vport_class); 678 unreg_host_class: 679 transport_class_unregister(&fc_host_class); 680 return error; 681 } 682 683 static void __exit fc_transport_exit(void) 684 { 685 transport_class_unregister(&fc_transport_class); 686 transport_class_unregister(&fc_rport_class); 687 transport_class_unregister(&fc_host_class); 688 transport_class_unregister(&fc_vport_class); 689 } 690 691 /* 692 * FC Remote Port Attribute Management 693 */ 694 695 #define fc_rport_show_function(field, format_string, sz, cast) \ 696 static ssize_t \ 697 show_fc_rport_##field (struct device *dev, \ 698 struct device_attribute *attr, char *buf) \ 699 { \ 700 struct fc_rport *rport = transport_class_to_rport(dev); \ 701 struct Scsi_Host *shost = rport_to_shost(rport); \ 702 struct fc_internal *i = to_fc_internal(shost->transportt); \ 703 if ((i->f->get_rport_##field) && \ 704 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 705 (rport->port_state == FC_PORTSTATE_DELETED) || \ 706 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 707 i->f->get_rport_##field(rport); \ 708 return snprintf(buf, sz, format_string, cast rport->field); \ 709 } 710 711 #define fc_rport_store_function(field) \ 712 static ssize_t \ 713 store_fc_rport_##field(struct device *dev, \ 714 struct device_attribute *attr, \ 715 const char *buf, size_t count) \ 716 { \ 717 int val; \ 718 struct fc_rport *rport = transport_class_to_rport(dev); \ 719 struct Scsi_Host *shost = rport_to_shost(rport); \ 720 struct fc_internal *i = to_fc_internal(shost->transportt); \ 721 char *cp; \ 722 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 723 (rport->port_state == FC_PORTSTATE_DELETED) || \ 724 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 725 return -EBUSY; \ 726 val = simple_strtoul(buf, &cp, 0); \ 727 if (*cp && (*cp != '\n')) \ 728 return -EINVAL; \ 729 i->f->set_rport_##field(rport, val); \ 730 return count; \ 731 } 732 733 #define fc_rport_rd_attr(field, format_string, sz) \ 734 fc_rport_show_function(field, format_string, sz, ) \ 735 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 736 show_fc_rport_##field, NULL) 737 738 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 739 fc_rport_show_function(field, format_string, sz, (cast)) \ 740 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 741 show_fc_rport_##field, NULL) 742 743 #define fc_rport_rw_attr(field, format_string, sz) \ 744 fc_rport_show_function(field, format_string, sz, ) \ 745 fc_rport_store_function(field) \ 746 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 747 show_fc_rport_##field, \ 748 store_fc_rport_##field) 749 750 751 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 752 static ssize_t \ 753 show_fc_rport_##field (struct device *dev, \ 754 struct device_attribute *attr, char *buf) \ 755 { \ 756 struct fc_rport *rport = transport_class_to_rport(dev); \ 757 return snprintf(buf, sz, format_string, cast rport->field); \ 758 } 759 760 #define fc_private_rport_rd_attr(field, format_string, sz) \ 761 fc_private_rport_show_function(field, format_string, sz, ) \ 762 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 763 show_fc_rport_##field, NULL) 764 765 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 766 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 767 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 768 show_fc_rport_##field, NULL) 769 770 771 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 772 static ssize_t \ 773 show_fc_rport_##title (struct device *dev, \ 774 struct device_attribute *attr, char *buf) \ 775 { \ 776 struct fc_rport *rport = transport_class_to_rport(dev); \ 777 const char *name; \ 778 name = get_fc_##title##_name(rport->title); \ 779 if (!name) \ 780 return -EINVAL; \ 781 return snprintf(buf, maxlen, "%s\n", name); \ 782 } \ 783 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 784 show_fc_rport_##title, NULL) 785 786 787 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 788 i->private_rport_attrs[count] = device_attr_rport_##field; \ 789 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 790 i->private_rport_attrs[count].store = NULL; \ 791 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 792 if (i->f->show_rport_##field) \ 793 count++ 794 795 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 796 i->private_rport_attrs[count] = device_attr_rport_##field; \ 797 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 798 i->private_rport_attrs[count].store = NULL; \ 799 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 800 count++ 801 802 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 803 i->private_rport_attrs[count] = device_attr_rport_##field; \ 804 if (!i->f->set_rport_##field) { \ 805 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 806 i->private_rport_attrs[count].store = NULL; \ 807 } \ 808 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 809 if (i->f->show_rport_##field) \ 810 count++ 811 812 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 813 { \ 814 i->private_rport_attrs[count] = device_attr_rport_##field; \ 815 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 816 count++; \ 817 } 818 819 820 /* The FC Transport Remote Port Attributes: */ 821 822 /* Fixed Remote Port Attributes */ 823 824 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 825 826 static ssize_t 827 show_fc_rport_supported_classes (struct device *dev, 828 struct device_attribute *attr, char *buf) 829 { 830 struct fc_rport *rport = transport_class_to_rport(dev); 831 if (rport->supported_classes == FC_COS_UNSPECIFIED) 832 return snprintf(buf, 20, "unspecified\n"); 833 return get_fc_cos_names(rport->supported_classes, buf); 834 } 835 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 836 show_fc_rport_supported_classes, NULL); 837 838 /* Dynamic Remote Port Attributes */ 839 840 /* 841 * dev_loss_tmo attribute 842 */ 843 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 844 { 845 char *cp; 846 847 *val = simple_strtoul(buf, &cp, 0); 848 if ((*cp && (*cp != '\n')) || (*val < 0)) 849 return -EINVAL; 850 /* 851 * Check for overflow; dev_loss_tmo is u32 852 */ 853 if (*val > UINT_MAX) 854 return -EINVAL; 855 856 return 0; 857 } 858 859 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 860 unsigned long val) 861 { 862 struct Scsi_Host *shost = rport_to_shost(rport); 863 struct fc_internal *i = to_fc_internal(shost->transportt); 864 865 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 866 (rport->port_state == FC_PORTSTATE_DELETED) || 867 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 868 return -EBUSY; 869 /* 870 * Check for overflow; dev_loss_tmo is u32 871 */ 872 if (val > UINT_MAX) 873 return -EINVAL; 874 875 /* 876 * If fast_io_fail is off we have to cap 877 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 878 */ 879 if (rport->fast_io_fail_tmo == -1 && 880 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 881 return -EINVAL; 882 883 i->f->set_rport_dev_loss_tmo(rport, val); 884 return 0; 885 } 886 887 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 888 static ssize_t 889 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 890 const char *buf, size_t count) 891 { 892 struct fc_rport *rport = transport_class_to_rport(dev); 893 unsigned long val; 894 int rc; 895 896 rc = fc_str_to_dev_loss(buf, &val); 897 if (rc) 898 return rc; 899 900 rc = fc_rport_set_dev_loss_tmo(rport, val); 901 if (rc) 902 return rc; 903 return count; 904 } 905 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 906 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 907 908 909 /* Private Remote Port Attributes */ 910 911 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 912 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 913 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 914 915 static ssize_t 916 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 917 char *buf) 918 { 919 struct fc_rport *rport = transport_class_to_rport(dev); 920 921 /* identify any roles that are port_id specific */ 922 if ((rport->port_id != -1) && 923 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 924 FC_WELLKNOWN_PORTID_MASK) { 925 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 926 case FC_FPORT_PORTID: 927 return snprintf(buf, 30, "Fabric Port\n"); 928 case FC_FABCTLR_PORTID: 929 return snprintf(buf, 30, "Fabric Controller\n"); 930 case FC_DIRSRVR_PORTID: 931 return snprintf(buf, 30, "Directory Server\n"); 932 case FC_TIMESRVR_PORTID: 933 return snprintf(buf, 30, "Time Server\n"); 934 case FC_MGMTSRVR_PORTID: 935 return snprintf(buf, 30, "Management Server\n"); 936 default: 937 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 938 } 939 } else { 940 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 941 return snprintf(buf, 20, "unknown\n"); 942 return get_fc_port_roles_names(rport->roles, buf); 943 } 944 } 945 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 946 show_fc_rport_roles, NULL); 947 948 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 949 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 950 951 /* 952 * fast_io_fail_tmo attribute 953 */ 954 static ssize_t 955 show_fc_rport_fast_io_fail_tmo (struct device *dev, 956 struct device_attribute *attr, char *buf) 957 { 958 struct fc_rport *rport = transport_class_to_rport(dev); 959 960 if (rport->fast_io_fail_tmo == -1) 961 return snprintf(buf, 5, "off\n"); 962 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 963 } 964 965 static ssize_t 966 store_fc_rport_fast_io_fail_tmo(struct device *dev, 967 struct device_attribute *attr, const char *buf, 968 size_t count) 969 { 970 int val; 971 char *cp; 972 struct fc_rport *rport = transport_class_to_rport(dev); 973 974 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 975 (rport->port_state == FC_PORTSTATE_DELETED) || 976 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 977 return -EBUSY; 978 if (strncmp(buf, "off", 3) == 0) 979 rport->fast_io_fail_tmo = -1; 980 else { 981 val = simple_strtoul(buf, &cp, 0); 982 if ((*cp && (*cp != '\n')) || (val < 0)) 983 return -EINVAL; 984 /* 985 * Cap fast_io_fail by dev_loss_tmo or 986 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 987 */ 988 if ((val >= rport->dev_loss_tmo) || 989 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 990 return -EINVAL; 991 992 rport->fast_io_fail_tmo = val; 993 } 994 return count; 995 } 996 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 997 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 998 999 1000 /* 1001 * FC SCSI Target Attribute Management 1002 */ 1003 1004 /* 1005 * Note: in the target show function we recognize when the remote 1006 * port is in the hierarchy and do not allow the driver to get 1007 * involved in sysfs functions. The driver only gets involved if 1008 * it's the "old" style that doesn't use rports. 1009 */ 1010 #define fc_starget_show_function(field, format_string, sz, cast) \ 1011 static ssize_t \ 1012 show_fc_starget_##field (struct device *dev, \ 1013 struct device_attribute *attr, char *buf) \ 1014 { \ 1015 struct scsi_target *starget = transport_class_to_starget(dev); \ 1016 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1017 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1018 struct fc_rport *rport = starget_to_rport(starget); \ 1019 if (rport) \ 1020 fc_starget_##field(starget) = rport->field; \ 1021 else if (i->f->get_starget_##field) \ 1022 i->f->get_starget_##field(starget); \ 1023 return snprintf(buf, sz, format_string, \ 1024 cast fc_starget_##field(starget)); \ 1025 } 1026 1027 #define fc_starget_rd_attr(field, format_string, sz) \ 1028 fc_starget_show_function(field, format_string, sz, ) \ 1029 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1030 show_fc_starget_##field, NULL) 1031 1032 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1033 fc_starget_show_function(field, format_string, sz, (cast)) \ 1034 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1035 show_fc_starget_##field, NULL) 1036 1037 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1038 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1039 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1040 i->private_starget_attrs[count].store = NULL; \ 1041 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1042 if (i->f->show_starget_##field) \ 1043 count++ 1044 1045 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1046 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1047 if (!i->f->set_starget_##field) { \ 1048 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1049 i->private_starget_attrs[count].store = NULL; \ 1050 } \ 1051 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1052 if (i->f->show_starget_##field) \ 1053 count++ 1054 1055 /* The FC Transport SCSI Target Attributes: */ 1056 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1057 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1058 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1059 1060 1061 /* 1062 * FC Virtual Port Attribute Management 1063 */ 1064 1065 #define fc_vport_show_function(field, format_string, sz, cast) \ 1066 static ssize_t \ 1067 show_fc_vport_##field (struct device *dev, \ 1068 struct device_attribute *attr, char *buf) \ 1069 { \ 1070 struct fc_vport *vport = transport_class_to_vport(dev); \ 1071 struct Scsi_Host *shost = vport_to_shost(vport); \ 1072 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1073 if ((i->f->get_vport_##field) && \ 1074 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1075 i->f->get_vport_##field(vport); \ 1076 return snprintf(buf, sz, format_string, cast vport->field); \ 1077 } 1078 1079 #define fc_vport_store_function(field) \ 1080 static ssize_t \ 1081 store_fc_vport_##field(struct device *dev, \ 1082 struct device_attribute *attr, \ 1083 const char *buf, size_t count) \ 1084 { \ 1085 int val; \ 1086 struct fc_vport *vport = transport_class_to_vport(dev); \ 1087 struct Scsi_Host *shost = vport_to_shost(vport); \ 1088 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1089 char *cp; \ 1090 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1091 return -EBUSY; \ 1092 val = simple_strtoul(buf, &cp, 0); \ 1093 if (*cp && (*cp != '\n')) \ 1094 return -EINVAL; \ 1095 i->f->set_vport_##field(vport, val); \ 1096 return count; \ 1097 } 1098 1099 #define fc_vport_store_str_function(field, slen) \ 1100 static ssize_t \ 1101 store_fc_vport_##field(struct device *dev, \ 1102 struct device_attribute *attr, \ 1103 const char *buf, size_t count) \ 1104 { \ 1105 struct fc_vport *vport = transport_class_to_vport(dev); \ 1106 struct Scsi_Host *shost = vport_to_shost(vport); \ 1107 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1108 unsigned int cnt=count; \ 1109 \ 1110 /* count may include a LF at end of string */ \ 1111 if (buf[cnt-1] == '\n') \ 1112 cnt--; \ 1113 if (cnt > ((slen) - 1)) \ 1114 return -EINVAL; \ 1115 memcpy(vport->field, buf, cnt); \ 1116 i->f->set_vport_##field(vport); \ 1117 return count; \ 1118 } 1119 1120 #define fc_vport_rd_attr(field, format_string, sz) \ 1121 fc_vport_show_function(field, format_string, sz, ) \ 1122 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1123 show_fc_vport_##field, NULL) 1124 1125 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1126 fc_vport_show_function(field, format_string, sz, (cast)) \ 1127 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1128 show_fc_vport_##field, NULL) 1129 1130 #define fc_vport_rw_attr(field, format_string, sz) \ 1131 fc_vport_show_function(field, format_string, sz, ) \ 1132 fc_vport_store_function(field) \ 1133 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1134 show_fc_vport_##field, \ 1135 store_fc_vport_##field) 1136 1137 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1138 static ssize_t \ 1139 show_fc_vport_##field (struct device *dev, \ 1140 struct device_attribute *attr, char *buf) \ 1141 { \ 1142 struct fc_vport *vport = transport_class_to_vport(dev); \ 1143 return snprintf(buf, sz, format_string, cast vport->field); \ 1144 } 1145 1146 #define fc_private_vport_store_u32_function(field) \ 1147 static ssize_t \ 1148 store_fc_vport_##field(struct device *dev, \ 1149 struct device_attribute *attr, \ 1150 const char *buf, size_t count) \ 1151 { \ 1152 u32 val; \ 1153 struct fc_vport *vport = transport_class_to_vport(dev); \ 1154 char *cp; \ 1155 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1156 return -EBUSY; \ 1157 val = simple_strtoul(buf, &cp, 0); \ 1158 if (*cp && (*cp != '\n')) \ 1159 return -EINVAL; \ 1160 vport->field = val; \ 1161 return count; \ 1162 } 1163 1164 1165 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1166 fc_private_vport_show_function(field, format_string, sz, ) \ 1167 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1168 show_fc_vport_##field, NULL) 1169 1170 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1171 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1172 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1173 show_fc_vport_##field, NULL) 1174 1175 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1176 fc_private_vport_show_function(field, format_string, sz, ) \ 1177 fc_private_vport_store_u32_function(field) \ 1178 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1179 show_fc_vport_##field, \ 1180 store_fc_vport_##field) 1181 1182 1183 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1184 static ssize_t \ 1185 show_fc_vport_##title (struct device *dev, \ 1186 struct device_attribute *attr, \ 1187 char *buf) \ 1188 { \ 1189 struct fc_vport *vport = transport_class_to_vport(dev); \ 1190 const char *name; \ 1191 name = get_fc_##title##_name(vport->title); \ 1192 if (!name) \ 1193 return -EINVAL; \ 1194 return snprintf(buf, maxlen, "%s\n", name); \ 1195 } \ 1196 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1197 show_fc_vport_##title, NULL) 1198 1199 1200 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1201 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1202 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1203 i->private_vport_attrs[count].store = NULL; \ 1204 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1205 if (i->f->get_##field) \ 1206 count++ 1207 /* NOTE: Above MACRO differs: checks function not show bit */ 1208 1209 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1210 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1211 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1212 i->private_vport_attrs[count].store = NULL; \ 1213 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1214 count++ 1215 1216 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1217 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1218 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1219 if (i->f->field) \ 1220 count++ 1221 /* NOTE: Above MACRO differs: checks function */ 1222 1223 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1224 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1225 if (!i->f->set_vport_##field) { \ 1226 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1227 i->private_vport_attrs[count].store = NULL; \ 1228 } \ 1229 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1230 count++ 1231 /* NOTE: Above MACRO differs: does not check show bit */ 1232 1233 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1234 { \ 1235 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1236 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1237 count++; \ 1238 } 1239 1240 1241 /* The FC Transport Virtual Port Attributes: */ 1242 1243 /* Fixed Virtual Port Attributes */ 1244 1245 /* Dynamic Virtual Port Attributes */ 1246 1247 /* Private Virtual Port Attributes */ 1248 1249 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1250 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1251 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1252 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1253 1254 static ssize_t 1255 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1256 char *buf) 1257 { 1258 struct fc_vport *vport = transport_class_to_vport(dev); 1259 1260 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1261 return snprintf(buf, 20, "unknown\n"); 1262 return get_fc_port_roles_names(vport->roles, buf); 1263 } 1264 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1265 1266 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1267 1268 fc_private_vport_show_function(symbolic_name, "%s\n", 1269 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1270 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1271 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1272 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1273 1274 static ssize_t 1275 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1276 const char *buf, size_t count) 1277 { 1278 struct fc_vport *vport = transport_class_to_vport(dev); 1279 struct Scsi_Host *shost = vport_to_shost(vport); 1280 unsigned long flags; 1281 1282 spin_lock_irqsave(shost->host_lock, flags); 1283 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1284 spin_unlock_irqrestore(shost->host_lock, flags); 1285 return -EBUSY; 1286 } 1287 vport->flags |= FC_VPORT_DELETING; 1288 spin_unlock_irqrestore(shost->host_lock, flags); 1289 1290 fc_queue_work(shost, &vport->vport_delete_work); 1291 return count; 1292 } 1293 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1294 NULL, store_fc_vport_delete); 1295 1296 1297 /* 1298 * Enable/Disable vport 1299 * Write "1" to disable, write "0" to enable 1300 */ 1301 static ssize_t 1302 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1303 const char *buf, 1304 size_t count) 1305 { 1306 struct fc_vport *vport = transport_class_to_vport(dev); 1307 struct Scsi_Host *shost = vport_to_shost(vport); 1308 struct fc_internal *i = to_fc_internal(shost->transportt); 1309 int stat; 1310 1311 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1312 return -EBUSY; 1313 1314 if (*buf == '0') { 1315 if (vport->vport_state != FC_VPORT_DISABLED) 1316 return -EALREADY; 1317 } else if (*buf == '1') { 1318 if (vport->vport_state == FC_VPORT_DISABLED) 1319 return -EALREADY; 1320 } else 1321 return -EINVAL; 1322 1323 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1324 return stat ? stat : count; 1325 } 1326 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1327 NULL, store_fc_vport_disable); 1328 1329 1330 /* 1331 * Host Attribute Management 1332 */ 1333 1334 #define fc_host_show_function(field, format_string, sz, cast) \ 1335 static ssize_t \ 1336 show_fc_host_##field (struct device *dev, \ 1337 struct device_attribute *attr, char *buf) \ 1338 { \ 1339 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1340 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1341 if (i->f->get_host_##field) \ 1342 i->f->get_host_##field(shost); \ 1343 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1344 } 1345 1346 #define fc_host_store_function(field) \ 1347 static ssize_t \ 1348 store_fc_host_##field(struct device *dev, \ 1349 struct device_attribute *attr, \ 1350 const char *buf, size_t count) \ 1351 { \ 1352 int val; \ 1353 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1354 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1355 char *cp; \ 1356 \ 1357 val = simple_strtoul(buf, &cp, 0); \ 1358 if (*cp && (*cp != '\n')) \ 1359 return -EINVAL; \ 1360 i->f->set_host_##field(shost, val); \ 1361 return count; \ 1362 } 1363 1364 #define fc_host_store_str_function(field, slen) \ 1365 static ssize_t \ 1366 store_fc_host_##field(struct device *dev, \ 1367 struct device_attribute *attr, \ 1368 const char *buf, size_t count) \ 1369 { \ 1370 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1371 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1372 unsigned int cnt=count; \ 1373 \ 1374 /* count may include a LF at end of string */ \ 1375 if (buf[cnt-1] == '\n') \ 1376 cnt--; \ 1377 if (cnt > ((slen) - 1)) \ 1378 return -EINVAL; \ 1379 memcpy(fc_host_##field(shost), buf, cnt); \ 1380 i->f->set_host_##field(shost); \ 1381 return count; \ 1382 } 1383 1384 #define fc_host_rd_attr(field, format_string, sz) \ 1385 fc_host_show_function(field, format_string, sz, ) \ 1386 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1387 show_fc_host_##field, NULL) 1388 1389 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1390 fc_host_show_function(field, format_string, sz, (cast)) \ 1391 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1392 show_fc_host_##field, NULL) 1393 1394 #define fc_host_rw_attr(field, format_string, sz) \ 1395 fc_host_show_function(field, format_string, sz, ) \ 1396 fc_host_store_function(field) \ 1397 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1398 show_fc_host_##field, \ 1399 store_fc_host_##field) 1400 1401 #define fc_host_rd_enum_attr(title, maxlen) \ 1402 static ssize_t \ 1403 show_fc_host_##title (struct device *dev, \ 1404 struct device_attribute *attr, char *buf) \ 1405 { \ 1406 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1407 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1408 const char *name; \ 1409 if (i->f->get_host_##title) \ 1410 i->f->get_host_##title(shost); \ 1411 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1412 if (!name) \ 1413 return -EINVAL; \ 1414 return snprintf(buf, maxlen, "%s\n", name); \ 1415 } \ 1416 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1417 1418 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1419 i->private_host_attrs[count] = device_attr_host_##field; \ 1420 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1421 i->private_host_attrs[count].store = NULL; \ 1422 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1423 if (i->f->show_host_##field) \ 1424 count++ 1425 1426 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1427 i->private_host_attrs[count] = device_attr_host_##field; \ 1428 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1429 i->private_host_attrs[count].store = NULL; \ 1430 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1431 count++ 1432 1433 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1434 i->private_host_attrs[count] = device_attr_host_##field; \ 1435 if (!i->f->set_host_##field) { \ 1436 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1437 i->private_host_attrs[count].store = NULL; \ 1438 } \ 1439 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1440 if (i->f->show_host_##field) \ 1441 count++ 1442 1443 1444 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1445 static ssize_t \ 1446 show_fc_host_##field (struct device *dev, \ 1447 struct device_attribute *attr, char *buf) \ 1448 { \ 1449 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1450 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1451 } 1452 1453 #define fc_private_host_rd_attr(field, format_string, sz) \ 1454 fc_private_host_show_function(field, format_string, sz, ) \ 1455 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1456 show_fc_host_##field, NULL) 1457 1458 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1459 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1460 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1461 show_fc_host_##field, NULL) 1462 1463 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1464 i->private_host_attrs[count] = device_attr_host_##field; \ 1465 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1466 i->private_host_attrs[count].store = NULL; \ 1467 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1468 count++ 1469 1470 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1471 { \ 1472 i->private_host_attrs[count] = device_attr_host_##field; \ 1473 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1474 count++; \ 1475 } 1476 1477 1478 /* Fixed Host Attributes */ 1479 1480 static ssize_t 1481 show_fc_host_supported_classes (struct device *dev, 1482 struct device_attribute *attr, char *buf) 1483 { 1484 struct Scsi_Host *shost = transport_class_to_shost(dev); 1485 1486 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1487 return snprintf(buf, 20, "unspecified\n"); 1488 1489 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1490 } 1491 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1492 show_fc_host_supported_classes, NULL); 1493 1494 static ssize_t 1495 show_fc_host_supported_fc4s (struct device *dev, 1496 struct device_attribute *attr, char *buf) 1497 { 1498 struct Scsi_Host *shost = transport_class_to_shost(dev); 1499 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1500 } 1501 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1502 show_fc_host_supported_fc4s, NULL); 1503 1504 static ssize_t 1505 show_fc_host_supported_speeds (struct device *dev, 1506 struct device_attribute *attr, char *buf) 1507 { 1508 struct Scsi_Host *shost = transport_class_to_shost(dev); 1509 1510 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1511 return snprintf(buf, 20, "unknown\n"); 1512 1513 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1514 } 1515 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1516 show_fc_host_supported_speeds, NULL); 1517 1518 1519 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1520 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1521 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1522 unsigned long long); 1523 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1524 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1525 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1526 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1527 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1528 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1529 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1530 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1531 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1532 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1533 1534 1535 /* Dynamic Host Attributes */ 1536 1537 static ssize_t 1538 show_fc_host_active_fc4s (struct device *dev, 1539 struct device_attribute *attr, char *buf) 1540 { 1541 struct Scsi_Host *shost = transport_class_to_shost(dev); 1542 struct fc_internal *i = to_fc_internal(shost->transportt); 1543 1544 if (i->f->get_host_active_fc4s) 1545 i->f->get_host_active_fc4s(shost); 1546 1547 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1548 } 1549 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1550 show_fc_host_active_fc4s, NULL); 1551 1552 static ssize_t 1553 show_fc_host_speed (struct device *dev, 1554 struct device_attribute *attr, char *buf) 1555 { 1556 struct Scsi_Host *shost = transport_class_to_shost(dev); 1557 struct fc_internal *i = to_fc_internal(shost->transportt); 1558 1559 if (i->f->get_host_speed) 1560 i->f->get_host_speed(shost); 1561 1562 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1563 return snprintf(buf, 20, "unknown\n"); 1564 1565 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1566 } 1567 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1568 show_fc_host_speed, NULL); 1569 1570 1571 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1572 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1573 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1574 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1575 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1576 1577 fc_private_host_show_function(system_hostname, "%s\n", 1578 FC_SYMBOLIC_NAME_SIZE + 1, ) 1579 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1580 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1581 show_fc_host_system_hostname, store_fc_host_system_hostname); 1582 1583 1584 /* Private Host Attributes */ 1585 1586 static ssize_t 1587 show_fc_private_host_tgtid_bind_type(struct device *dev, 1588 struct device_attribute *attr, char *buf) 1589 { 1590 struct Scsi_Host *shost = transport_class_to_shost(dev); 1591 const char *name; 1592 1593 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1594 if (!name) 1595 return -EINVAL; 1596 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1597 } 1598 1599 #define get_list_head_entry(pos, head, member) \ 1600 pos = list_entry((head)->next, typeof(*pos), member) 1601 1602 static ssize_t 1603 store_fc_private_host_tgtid_bind_type(struct device *dev, 1604 struct device_attribute *attr, const char *buf, size_t count) 1605 { 1606 struct Scsi_Host *shost = transport_class_to_shost(dev); 1607 struct fc_rport *rport; 1608 enum fc_tgtid_binding_type val; 1609 unsigned long flags; 1610 1611 if (get_fc_tgtid_bind_type_match(buf, &val)) 1612 return -EINVAL; 1613 1614 /* if changing bind type, purge all unused consistent bindings */ 1615 if (val != fc_host_tgtid_bind_type(shost)) { 1616 spin_lock_irqsave(shost->host_lock, flags); 1617 while (!list_empty(&fc_host_rport_bindings(shost))) { 1618 get_list_head_entry(rport, 1619 &fc_host_rport_bindings(shost), peers); 1620 list_del(&rport->peers); 1621 rport->port_state = FC_PORTSTATE_DELETED; 1622 fc_queue_work(shost, &rport->rport_delete_work); 1623 } 1624 spin_unlock_irqrestore(shost->host_lock, flags); 1625 } 1626 1627 fc_host_tgtid_bind_type(shost) = val; 1628 return count; 1629 } 1630 1631 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1632 show_fc_private_host_tgtid_bind_type, 1633 store_fc_private_host_tgtid_bind_type); 1634 1635 static ssize_t 1636 store_fc_private_host_issue_lip(struct device *dev, 1637 struct device_attribute *attr, const char *buf, size_t count) 1638 { 1639 struct Scsi_Host *shost = transport_class_to_shost(dev); 1640 struct fc_internal *i = to_fc_internal(shost->transportt); 1641 int ret; 1642 1643 /* ignore any data value written to the attribute */ 1644 if (i->f->issue_fc_host_lip) { 1645 ret = i->f->issue_fc_host_lip(shost); 1646 return ret ? ret: count; 1647 } 1648 1649 return -ENOENT; 1650 } 1651 1652 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1653 store_fc_private_host_issue_lip); 1654 1655 static ssize_t 1656 store_fc_private_host_dev_loss_tmo(struct device *dev, 1657 struct device_attribute *attr, 1658 const char *buf, size_t count) 1659 { 1660 struct Scsi_Host *shost = transport_class_to_shost(dev); 1661 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1662 struct fc_rport *rport; 1663 unsigned long val, flags; 1664 int rc; 1665 1666 rc = fc_str_to_dev_loss(buf, &val); 1667 if (rc) 1668 return rc; 1669 1670 fc_host_dev_loss_tmo(shost) = val; 1671 spin_lock_irqsave(shost->host_lock, flags); 1672 list_for_each_entry(rport, &fc_host->rports, peers) 1673 fc_rport_set_dev_loss_tmo(rport, val); 1674 spin_unlock_irqrestore(shost->host_lock, flags); 1675 return count; 1676 } 1677 1678 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 1679 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 1680 show_fc_host_dev_loss_tmo, 1681 store_fc_private_host_dev_loss_tmo); 1682 1683 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1684 1685 /* 1686 * Host Statistics Management 1687 */ 1688 1689 /* Show a given an attribute in the statistics group */ 1690 static ssize_t 1691 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1692 { 1693 struct Scsi_Host *shost = transport_class_to_shost(dev); 1694 struct fc_internal *i = to_fc_internal(shost->transportt); 1695 struct fc_host_statistics *stats; 1696 ssize_t ret = -ENOENT; 1697 1698 if (offset > sizeof(struct fc_host_statistics) || 1699 offset % sizeof(u64) != 0) 1700 WARN_ON(1); 1701 1702 if (i->f->get_fc_host_stats) { 1703 stats = (i->f->get_fc_host_stats)(shost); 1704 if (stats) 1705 ret = snprintf(buf, 20, "0x%llx\n", 1706 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1707 } 1708 return ret; 1709 } 1710 1711 1712 /* generate a read-only statistics attribute */ 1713 #define fc_host_statistic(name) \ 1714 static ssize_t show_fcstat_##name(struct device *cd, \ 1715 struct device_attribute *attr, \ 1716 char *buf) \ 1717 { \ 1718 return fc_stat_show(cd, buf, \ 1719 offsetof(struct fc_host_statistics, name)); \ 1720 } \ 1721 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1722 1723 fc_host_statistic(seconds_since_last_reset); 1724 fc_host_statistic(tx_frames); 1725 fc_host_statistic(tx_words); 1726 fc_host_statistic(rx_frames); 1727 fc_host_statistic(rx_words); 1728 fc_host_statistic(lip_count); 1729 fc_host_statistic(nos_count); 1730 fc_host_statistic(error_frames); 1731 fc_host_statistic(dumped_frames); 1732 fc_host_statistic(link_failure_count); 1733 fc_host_statistic(loss_of_sync_count); 1734 fc_host_statistic(loss_of_signal_count); 1735 fc_host_statistic(prim_seq_protocol_err_count); 1736 fc_host_statistic(invalid_tx_word_count); 1737 fc_host_statistic(invalid_crc_count); 1738 fc_host_statistic(fcp_input_requests); 1739 fc_host_statistic(fcp_output_requests); 1740 fc_host_statistic(fcp_control_requests); 1741 fc_host_statistic(fcp_input_megabytes); 1742 fc_host_statistic(fcp_output_megabytes); 1743 fc_host_statistic(fcp_packet_alloc_failures); 1744 fc_host_statistic(fcp_packet_aborts); 1745 fc_host_statistic(fcp_frame_alloc_failures); 1746 fc_host_statistic(fc_no_free_exch); 1747 fc_host_statistic(fc_no_free_exch_xid); 1748 fc_host_statistic(fc_xid_not_found); 1749 fc_host_statistic(fc_xid_busy); 1750 fc_host_statistic(fc_seq_not_found); 1751 fc_host_statistic(fc_non_bls_resp); 1752 1753 static ssize_t 1754 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1755 const char *buf, size_t count) 1756 { 1757 struct Scsi_Host *shost = transport_class_to_shost(dev); 1758 struct fc_internal *i = to_fc_internal(shost->transportt); 1759 1760 /* ignore any data value written to the attribute */ 1761 if (i->f->reset_fc_host_stats) { 1762 i->f->reset_fc_host_stats(shost); 1763 return count; 1764 } 1765 1766 return -ENOENT; 1767 } 1768 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1769 fc_reset_statistics); 1770 1771 static struct attribute *fc_statistics_attrs[] = { 1772 &device_attr_host_seconds_since_last_reset.attr, 1773 &device_attr_host_tx_frames.attr, 1774 &device_attr_host_tx_words.attr, 1775 &device_attr_host_rx_frames.attr, 1776 &device_attr_host_rx_words.attr, 1777 &device_attr_host_lip_count.attr, 1778 &device_attr_host_nos_count.attr, 1779 &device_attr_host_error_frames.attr, 1780 &device_attr_host_dumped_frames.attr, 1781 &device_attr_host_link_failure_count.attr, 1782 &device_attr_host_loss_of_sync_count.attr, 1783 &device_attr_host_loss_of_signal_count.attr, 1784 &device_attr_host_prim_seq_protocol_err_count.attr, 1785 &device_attr_host_invalid_tx_word_count.attr, 1786 &device_attr_host_invalid_crc_count.attr, 1787 &device_attr_host_fcp_input_requests.attr, 1788 &device_attr_host_fcp_output_requests.attr, 1789 &device_attr_host_fcp_control_requests.attr, 1790 &device_attr_host_fcp_input_megabytes.attr, 1791 &device_attr_host_fcp_output_megabytes.attr, 1792 &device_attr_host_fcp_packet_alloc_failures.attr, 1793 &device_attr_host_fcp_packet_aborts.attr, 1794 &device_attr_host_fcp_frame_alloc_failures.attr, 1795 &device_attr_host_fc_no_free_exch.attr, 1796 &device_attr_host_fc_no_free_exch_xid.attr, 1797 &device_attr_host_fc_xid_not_found.attr, 1798 &device_attr_host_fc_xid_busy.attr, 1799 &device_attr_host_fc_seq_not_found.attr, 1800 &device_attr_host_fc_non_bls_resp.attr, 1801 &device_attr_host_reset_statistics.attr, 1802 NULL 1803 }; 1804 1805 static struct attribute_group fc_statistics_group = { 1806 .name = "statistics", 1807 .attrs = fc_statistics_attrs, 1808 }; 1809 1810 1811 /* Host Vport Attributes */ 1812 1813 static int 1814 fc_parse_wwn(const char *ns, u64 *nm) 1815 { 1816 unsigned int i, j; 1817 u8 wwn[8]; 1818 1819 memset(wwn, 0, sizeof(wwn)); 1820 1821 /* Validate and store the new name */ 1822 for (i=0, j=0; i < 16; i++) { 1823 int value; 1824 1825 value = hex_to_bin(*ns++); 1826 if (value >= 0) 1827 j = (j << 4) | value; 1828 else 1829 return -EINVAL; 1830 if (i % 2) { 1831 wwn[i/2] = j & 0xff; 1832 j = 0; 1833 } 1834 } 1835 1836 *nm = wwn_to_u64(wwn); 1837 1838 return 0; 1839 } 1840 1841 1842 /* 1843 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1844 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1845 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1846 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1847 */ 1848 static ssize_t 1849 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1850 const char *buf, size_t count) 1851 { 1852 struct Scsi_Host *shost = transport_class_to_shost(dev); 1853 struct fc_vport_identifiers vid; 1854 struct fc_vport *vport; 1855 unsigned int cnt=count; 1856 int stat; 1857 1858 memset(&vid, 0, sizeof(vid)); 1859 1860 /* count may include a LF at end of string */ 1861 if (buf[cnt-1] == '\n') 1862 cnt--; 1863 1864 /* validate we have enough characters for WWPN */ 1865 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1866 return -EINVAL; 1867 1868 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1869 if (stat) 1870 return stat; 1871 1872 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1873 if (stat) 1874 return stat; 1875 1876 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1877 vid.vport_type = FC_PORTTYPE_NPIV; 1878 /* vid.symbolic_name is already zero/NULL's */ 1879 vid.disable = false; /* always enabled */ 1880 1881 /* we only allow support on Channel 0 !!! */ 1882 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1883 return stat ? stat : count; 1884 } 1885 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1886 store_fc_host_vport_create); 1887 1888 1889 /* 1890 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1891 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1892 * The WWNs are specified as hex characters, and may *not* contain 1893 * any prefixes (e.g. 0x, x, etc) 1894 */ 1895 static ssize_t 1896 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1897 const char *buf, size_t count) 1898 { 1899 struct Scsi_Host *shost = transport_class_to_shost(dev); 1900 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1901 struct fc_vport *vport; 1902 u64 wwpn, wwnn; 1903 unsigned long flags; 1904 unsigned int cnt=count; 1905 int stat, match; 1906 1907 /* count may include a LF at end of string */ 1908 if (buf[cnt-1] == '\n') 1909 cnt--; 1910 1911 /* validate we have enough characters for WWPN */ 1912 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1913 return -EINVAL; 1914 1915 stat = fc_parse_wwn(&buf[0], &wwpn); 1916 if (stat) 1917 return stat; 1918 1919 stat = fc_parse_wwn(&buf[17], &wwnn); 1920 if (stat) 1921 return stat; 1922 1923 spin_lock_irqsave(shost->host_lock, flags); 1924 match = 0; 1925 /* we only allow support on Channel 0 !!! */ 1926 list_for_each_entry(vport, &fc_host->vports, peers) { 1927 if ((vport->channel == 0) && 1928 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1929 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1930 break; 1931 vport->flags |= FC_VPORT_DELETING; 1932 match = 1; 1933 break; 1934 } 1935 } 1936 spin_unlock_irqrestore(shost->host_lock, flags); 1937 1938 if (!match) 1939 return -ENODEV; 1940 1941 stat = fc_vport_terminate(vport); 1942 return stat ? stat : count; 1943 } 1944 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1945 store_fc_host_vport_delete); 1946 1947 1948 static int fc_host_match(struct attribute_container *cont, 1949 struct device *dev) 1950 { 1951 struct Scsi_Host *shost; 1952 struct fc_internal *i; 1953 1954 if (!scsi_is_host_device(dev)) 1955 return 0; 1956 1957 shost = dev_to_shost(dev); 1958 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1959 != &fc_host_class.class) 1960 return 0; 1961 1962 i = to_fc_internal(shost->transportt); 1963 1964 return &i->t.host_attrs.ac == cont; 1965 } 1966 1967 static int fc_target_match(struct attribute_container *cont, 1968 struct device *dev) 1969 { 1970 struct Scsi_Host *shost; 1971 struct fc_internal *i; 1972 1973 if (!scsi_is_target_device(dev)) 1974 return 0; 1975 1976 shost = dev_to_shost(dev->parent); 1977 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1978 != &fc_host_class.class) 1979 return 0; 1980 1981 i = to_fc_internal(shost->transportt); 1982 1983 return &i->t.target_attrs.ac == cont; 1984 } 1985 1986 static void fc_rport_dev_release(struct device *dev) 1987 { 1988 struct fc_rport *rport = dev_to_rport(dev); 1989 put_device(dev->parent); 1990 kfree(rport); 1991 } 1992 1993 int scsi_is_fc_rport(const struct device *dev) 1994 { 1995 return dev->release == fc_rport_dev_release; 1996 } 1997 EXPORT_SYMBOL(scsi_is_fc_rport); 1998 1999 static int fc_rport_match(struct attribute_container *cont, 2000 struct device *dev) 2001 { 2002 struct Scsi_Host *shost; 2003 struct fc_internal *i; 2004 2005 if (!scsi_is_fc_rport(dev)) 2006 return 0; 2007 2008 shost = dev_to_shost(dev->parent); 2009 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2010 != &fc_host_class.class) 2011 return 0; 2012 2013 i = to_fc_internal(shost->transportt); 2014 2015 return &i->rport_attr_cont.ac == cont; 2016 } 2017 2018 2019 static void fc_vport_dev_release(struct device *dev) 2020 { 2021 struct fc_vport *vport = dev_to_vport(dev); 2022 put_device(dev->parent); /* release kobj parent */ 2023 kfree(vport); 2024 } 2025 2026 int scsi_is_fc_vport(const struct device *dev) 2027 { 2028 return dev->release == fc_vport_dev_release; 2029 } 2030 EXPORT_SYMBOL(scsi_is_fc_vport); 2031 2032 static int fc_vport_match(struct attribute_container *cont, 2033 struct device *dev) 2034 { 2035 struct fc_vport *vport; 2036 struct Scsi_Host *shost; 2037 struct fc_internal *i; 2038 2039 if (!scsi_is_fc_vport(dev)) 2040 return 0; 2041 vport = dev_to_vport(dev); 2042 2043 shost = vport_to_shost(vport); 2044 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2045 != &fc_host_class.class) 2046 return 0; 2047 2048 i = to_fc_internal(shost->transportt); 2049 return &i->vport_attr_cont.ac == cont; 2050 } 2051 2052 2053 /** 2054 * fc_timed_out - FC Transport I/O timeout intercept handler 2055 * @scmd: The SCSI command which timed out 2056 * 2057 * This routine protects against error handlers getting invoked while a 2058 * rport is in a blocked state, typically due to a temporarily loss of 2059 * connectivity. If the error handlers are allowed to proceed, requests 2060 * to abort i/o, reset the target, etc will likely fail as there is no way 2061 * to communicate with the device to perform the requested function. These 2062 * failures may result in the midlayer taking the device offline, requiring 2063 * manual intervention to restore operation. 2064 * 2065 * This routine, called whenever an i/o times out, validates the state of 2066 * the underlying rport. If the rport is blocked, it returns 2067 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2068 * Eventually, either the device will return, or devloss_tmo will fire, 2069 * and when the timeout then fires, it will be handled normally. 2070 * If the rport is not blocked, normal error handling continues. 2071 * 2072 * Notes: 2073 * This routine assumes no locks are held on entry. 2074 */ 2075 static enum blk_eh_timer_return 2076 fc_timed_out(struct scsi_cmnd *scmd) 2077 { 2078 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2079 2080 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2081 return BLK_EH_RESET_TIMER; 2082 2083 return BLK_EH_NOT_HANDLED; 2084 } 2085 2086 /* 2087 * Called by fc_user_scan to locate an rport on the shost that 2088 * matches the channel and target id, and invoke scsi_scan_target() 2089 * on the rport. 2090 */ 2091 static void 2092 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2093 { 2094 struct fc_rport *rport; 2095 unsigned long flags; 2096 2097 spin_lock_irqsave(shost->host_lock, flags); 2098 2099 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2100 if (rport->scsi_target_id == -1) 2101 continue; 2102 2103 if (rport->port_state != FC_PORTSTATE_ONLINE) 2104 continue; 2105 2106 if ((channel == rport->channel) && 2107 (id == rport->scsi_target_id)) { 2108 spin_unlock_irqrestore(shost->host_lock, flags); 2109 scsi_scan_target(&rport->dev, channel, id, lun, 1); 2110 return; 2111 } 2112 } 2113 2114 spin_unlock_irqrestore(shost->host_lock, flags); 2115 } 2116 2117 /* 2118 * Called via sysfs scan routines. Necessary, as the FC transport 2119 * wants to place all target objects below the rport object. So this 2120 * routine must invoke the scsi_scan_target() routine with the rport 2121 * object as the parent. 2122 */ 2123 static int 2124 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2125 { 2126 uint chlo, chhi; 2127 uint tgtlo, tgthi; 2128 2129 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2130 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2131 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2132 return -EINVAL; 2133 2134 if (channel == SCAN_WILD_CARD) { 2135 chlo = 0; 2136 chhi = shost->max_channel + 1; 2137 } else { 2138 chlo = channel; 2139 chhi = channel + 1; 2140 } 2141 2142 if (id == SCAN_WILD_CARD) { 2143 tgtlo = 0; 2144 tgthi = shost->max_id; 2145 } else { 2146 tgtlo = id; 2147 tgthi = id + 1; 2148 } 2149 2150 for ( ; chlo < chhi; chlo++) 2151 for ( ; tgtlo < tgthi; tgtlo++) 2152 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2153 2154 return 0; 2155 } 2156 2157 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, 2158 int result) 2159 { 2160 struct fc_internal *i = to_fc_internal(shost->transportt); 2161 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); 2162 } 2163 2164 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) 2165 { 2166 struct fc_internal *i = to_fc_internal(shost->transportt); 2167 return i->f->it_nexus_response(shost, nexus, result); 2168 } 2169 2170 struct scsi_transport_template * 2171 fc_attach_transport(struct fc_function_template *ft) 2172 { 2173 int count; 2174 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2175 GFP_KERNEL); 2176 2177 if (unlikely(!i)) 2178 return NULL; 2179 2180 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2181 i->t.target_attrs.ac.class = &fc_transport_class.class; 2182 i->t.target_attrs.ac.match = fc_target_match; 2183 i->t.target_size = sizeof(struct fc_starget_attrs); 2184 transport_container_register(&i->t.target_attrs); 2185 2186 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2187 i->t.host_attrs.ac.class = &fc_host_class.class; 2188 i->t.host_attrs.ac.match = fc_host_match; 2189 i->t.host_size = sizeof(struct fc_host_attrs); 2190 if (ft->get_fc_host_stats) 2191 i->t.host_attrs.statistics = &fc_statistics_group; 2192 transport_container_register(&i->t.host_attrs); 2193 2194 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2195 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2196 i->rport_attr_cont.ac.match = fc_rport_match; 2197 transport_container_register(&i->rport_attr_cont); 2198 2199 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2200 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2201 i->vport_attr_cont.ac.match = fc_vport_match; 2202 transport_container_register(&i->vport_attr_cont); 2203 2204 i->f = ft; 2205 2206 /* Transport uses the shost workq for scsi scanning */ 2207 i->t.create_work_queue = 1; 2208 2209 i->t.eh_timed_out = fc_timed_out; 2210 2211 i->t.user_scan = fc_user_scan; 2212 2213 /* target-mode drivers' functions */ 2214 i->t.tsk_mgmt_response = fc_tsk_mgmt_response; 2215 i->t.it_nexus_response = fc_it_nexus_response; 2216 2217 /* 2218 * Setup SCSI Target Attributes. 2219 */ 2220 count = 0; 2221 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2222 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2223 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2224 2225 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2226 2227 i->starget_attrs[count] = NULL; 2228 2229 2230 /* 2231 * Setup SCSI Host Attributes. 2232 */ 2233 count=0; 2234 SETUP_HOST_ATTRIBUTE_RD(node_name); 2235 SETUP_HOST_ATTRIBUTE_RD(port_name); 2236 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2237 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2238 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2239 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2240 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2241 if (ft->vport_create) { 2242 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2243 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2244 } 2245 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2246 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2247 SETUP_HOST_ATTRIBUTE_RD(model); 2248 SETUP_HOST_ATTRIBUTE_RD(model_description); 2249 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2250 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2251 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2252 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2253 2254 SETUP_HOST_ATTRIBUTE_RD(port_id); 2255 SETUP_HOST_ATTRIBUTE_RD(port_type); 2256 SETUP_HOST_ATTRIBUTE_RD(port_state); 2257 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2258 SETUP_HOST_ATTRIBUTE_RD(speed); 2259 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2260 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2261 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2262 2263 /* Transport-managed attributes */ 2264 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2265 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2266 if (ft->issue_fc_host_lip) 2267 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2268 if (ft->vport_create) 2269 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2270 if (ft->vport_delete) 2271 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2272 2273 BUG_ON(count > FC_HOST_NUM_ATTRS); 2274 2275 i->host_attrs[count] = NULL; 2276 2277 /* 2278 * Setup Remote Port Attributes. 2279 */ 2280 count=0; 2281 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2282 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2283 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2284 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2285 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2286 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2287 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2288 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2289 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2290 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2291 2292 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2293 2294 i->rport_attrs[count] = NULL; 2295 2296 /* 2297 * Setup Virtual Port Attributes. 2298 */ 2299 count=0; 2300 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2301 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2302 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2303 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2304 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2305 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2306 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2307 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2308 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2309 2310 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2311 2312 i->vport_attrs[count] = NULL; 2313 2314 return &i->t; 2315 } 2316 EXPORT_SYMBOL(fc_attach_transport); 2317 2318 void fc_release_transport(struct scsi_transport_template *t) 2319 { 2320 struct fc_internal *i = to_fc_internal(t); 2321 2322 transport_container_unregister(&i->t.target_attrs); 2323 transport_container_unregister(&i->t.host_attrs); 2324 transport_container_unregister(&i->rport_attr_cont); 2325 transport_container_unregister(&i->vport_attr_cont); 2326 2327 kfree(i); 2328 } 2329 EXPORT_SYMBOL(fc_release_transport); 2330 2331 /** 2332 * fc_queue_work - Queue work to the fc_host workqueue. 2333 * @shost: Pointer to Scsi_Host bound to fc_host. 2334 * @work: Work to queue for execution. 2335 * 2336 * Return value: 2337 * 1 - work queued for execution 2338 * 0 - work is already queued 2339 * -EINVAL - work queue doesn't exist 2340 */ 2341 static int 2342 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2343 { 2344 if (unlikely(!fc_host_work_q(shost))) { 2345 printk(KERN_ERR 2346 "ERROR: FC host '%s' attempted to queue work, " 2347 "when no workqueue created.\n", shost->hostt->name); 2348 dump_stack(); 2349 2350 return -EINVAL; 2351 } 2352 2353 return queue_work(fc_host_work_q(shost), work); 2354 } 2355 2356 /** 2357 * fc_flush_work - Flush a fc_host's workqueue. 2358 * @shost: Pointer to Scsi_Host bound to fc_host. 2359 */ 2360 static void 2361 fc_flush_work(struct Scsi_Host *shost) 2362 { 2363 if (!fc_host_work_q(shost)) { 2364 printk(KERN_ERR 2365 "ERROR: FC host '%s' attempted to flush work, " 2366 "when no workqueue created.\n", shost->hostt->name); 2367 dump_stack(); 2368 return; 2369 } 2370 2371 flush_workqueue(fc_host_work_q(shost)); 2372 } 2373 2374 /** 2375 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2376 * @shost: Pointer to Scsi_Host bound to fc_host. 2377 * @work: Work to queue for execution. 2378 * @delay: jiffies to delay the work queuing 2379 * 2380 * Return value: 2381 * 1 on success / 0 already queued / < 0 for error 2382 */ 2383 static int 2384 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2385 unsigned long delay) 2386 { 2387 if (unlikely(!fc_host_devloss_work_q(shost))) { 2388 printk(KERN_ERR 2389 "ERROR: FC host '%s' attempted to queue work, " 2390 "when no workqueue created.\n", shost->hostt->name); 2391 dump_stack(); 2392 2393 return -EINVAL; 2394 } 2395 2396 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2397 } 2398 2399 /** 2400 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2401 * @shost: Pointer to Scsi_Host bound to fc_host. 2402 */ 2403 static void 2404 fc_flush_devloss(struct Scsi_Host *shost) 2405 { 2406 if (!fc_host_devloss_work_q(shost)) { 2407 printk(KERN_ERR 2408 "ERROR: FC host '%s' attempted to flush work, " 2409 "when no workqueue created.\n", shost->hostt->name); 2410 dump_stack(); 2411 return; 2412 } 2413 2414 flush_workqueue(fc_host_devloss_work_q(shost)); 2415 } 2416 2417 2418 /** 2419 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2420 * @shost: Which &Scsi_Host 2421 * 2422 * This routine is expected to be called immediately preceding the 2423 * a driver's call to scsi_remove_host(). 2424 * 2425 * WARNING: A driver utilizing the fc_transport, which fails to call 2426 * this routine prior to scsi_remove_host(), will leave dangling 2427 * objects in /sys/class/fc_remote_ports. Access to any of these 2428 * objects can result in a system crash !!! 2429 * 2430 * Notes: 2431 * This routine assumes no locks are held on entry. 2432 */ 2433 void 2434 fc_remove_host(struct Scsi_Host *shost) 2435 { 2436 struct fc_vport *vport = NULL, *next_vport = NULL; 2437 struct fc_rport *rport = NULL, *next_rport = NULL; 2438 struct workqueue_struct *work_q; 2439 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2440 unsigned long flags; 2441 2442 spin_lock_irqsave(shost->host_lock, flags); 2443 2444 /* Remove any vports */ 2445 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) 2446 fc_queue_work(shost, &vport->vport_delete_work); 2447 2448 /* Remove any remote ports */ 2449 list_for_each_entry_safe(rport, next_rport, 2450 &fc_host->rports, peers) { 2451 list_del(&rport->peers); 2452 rport->port_state = FC_PORTSTATE_DELETED; 2453 fc_queue_work(shost, &rport->rport_delete_work); 2454 } 2455 2456 list_for_each_entry_safe(rport, next_rport, 2457 &fc_host->rport_bindings, peers) { 2458 list_del(&rport->peers); 2459 rport->port_state = FC_PORTSTATE_DELETED; 2460 fc_queue_work(shost, &rport->rport_delete_work); 2461 } 2462 2463 spin_unlock_irqrestore(shost->host_lock, flags); 2464 2465 /* flush all scan work items */ 2466 scsi_flush_work(shost); 2467 2468 /* flush all stgt delete, and rport delete work items, then kill it */ 2469 if (fc_host->work_q) { 2470 work_q = fc_host->work_q; 2471 fc_host->work_q = NULL; 2472 destroy_workqueue(work_q); 2473 } 2474 2475 /* flush all devloss work items, then kill it */ 2476 if (fc_host->devloss_work_q) { 2477 work_q = fc_host->devloss_work_q; 2478 fc_host->devloss_work_q = NULL; 2479 destroy_workqueue(work_q); 2480 } 2481 } 2482 EXPORT_SYMBOL(fc_remove_host); 2483 2484 static void fc_terminate_rport_io(struct fc_rport *rport) 2485 { 2486 struct Scsi_Host *shost = rport_to_shost(rport); 2487 struct fc_internal *i = to_fc_internal(shost->transportt); 2488 2489 /* Involve the LLDD if possible to terminate all io on the rport. */ 2490 if (i->f->terminate_rport_io) 2491 i->f->terminate_rport_io(rport); 2492 2493 /* 2494 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2495 */ 2496 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2497 } 2498 2499 /** 2500 * fc_starget_delete - called to delete the scsi descendants of an rport 2501 * @work: remote port to be operated on. 2502 * 2503 * Deletes target and all sdevs. 2504 */ 2505 static void 2506 fc_starget_delete(struct work_struct *work) 2507 { 2508 struct fc_rport *rport = 2509 container_of(work, struct fc_rport, stgt_delete_work); 2510 2511 fc_terminate_rport_io(rport); 2512 scsi_remove_target(&rport->dev); 2513 } 2514 2515 2516 /** 2517 * fc_rport_final_delete - finish rport termination and delete it. 2518 * @work: remote port to be deleted. 2519 */ 2520 static void 2521 fc_rport_final_delete(struct work_struct *work) 2522 { 2523 struct fc_rport *rport = 2524 container_of(work, struct fc_rport, rport_delete_work); 2525 struct device *dev = &rport->dev; 2526 struct Scsi_Host *shost = rport_to_shost(rport); 2527 struct fc_internal *i = to_fc_internal(shost->transportt); 2528 unsigned long flags; 2529 int do_callback = 0; 2530 2531 fc_terminate_rport_io(rport); 2532 2533 /* 2534 * if a scan is pending, flush the SCSI Host work_q so that 2535 * that we can reclaim the rport scan work element. 2536 */ 2537 if (rport->flags & FC_RPORT_SCAN_PENDING) 2538 scsi_flush_work(shost); 2539 2540 /* 2541 * Cancel any outstanding timers. These should really exist 2542 * only when rmmod'ing the LLDD and we're asking for 2543 * immediate termination of the rports 2544 */ 2545 spin_lock_irqsave(shost->host_lock, flags); 2546 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2547 spin_unlock_irqrestore(shost->host_lock, flags); 2548 if (!cancel_delayed_work(&rport->fail_io_work)) 2549 fc_flush_devloss(shost); 2550 if (!cancel_delayed_work(&rport->dev_loss_work)) 2551 fc_flush_devloss(shost); 2552 cancel_work_sync(&rport->scan_work); 2553 spin_lock_irqsave(shost->host_lock, flags); 2554 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2555 } 2556 spin_unlock_irqrestore(shost->host_lock, flags); 2557 2558 /* Delete SCSI target and sdevs */ 2559 if (rport->scsi_target_id != -1) 2560 fc_starget_delete(&rport->stgt_delete_work); 2561 2562 /* 2563 * Notify the driver that the rport is now dead. The LLDD will 2564 * also guarantee that any communication to the rport is terminated 2565 * 2566 * Avoid this call if we already called it when we preserved the 2567 * rport for the binding. 2568 */ 2569 spin_lock_irqsave(shost->host_lock, flags); 2570 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2571 (i->f->dev_loss_tmo_callbk)) { 2572 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2573 do_callback = 1; 2574 } 2575 spin_unlock_irqrestore(shost->host_lock, flags); 2576 2577 if (do_callback) 2578 i->f->dev_loss_tmo_callbk(rport); 2579 2580 fc_bsg_remove(rport->rqst_q); 2581 2582 transport_remove_device(dev); 2583 device_del(dev); 2584 transport_destroy_device(dev); 2585 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2586 put_device(dev); /* for self-reference */ 2587 } 2588 2589 2590 /** 2591 * fc_rport_create - allocates and creates a remote FC port. 2592 * @shost: scsi host the remote port is connected to. 2593 * @channel: Channel on shost port connected to. 2594 * @ids: The world wide names, fc address, and FC4 port 2595 * roles for the remote port. 2596 * 2597 * Allocates and creates the remoter port structure, including the 2598 * class and sysfs creation. 2599 * 2600 * Notes: 2601 * This routine assumes no locks are held on entry. 2602 */ 2603 static struct fc_rport * 2604 fc_rport_create(struct Scsi_Host *shost, int channel, 2605 struct fc_rport_identifiers *ids) 2606 { 2607 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2608 struct fc_internal *fci = to_fc_internal(shost->transportt); 2609 struct fc_rport *rport; 2610 struct device *dev; 2611 unsigned long flags; 2612 int error; 2613 size_t size; 2614 2615 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2616 rport = kzalloc(size, GFP_KERNEL); 2617 if (unlikely(!rport)) { 2618 printk(KERN_ERR "%s: allocation failure\n", __func__); 2619 return NULL; 2620 } 2621 2622 rport->maxframe_size = -1; 2623 rport->supported_classes = FC_COS_UNSPECIFIED; 2624 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2625 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2626 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2627 rport->port_id = ids->port_id; 2628 rport->roles = ids->roles; 2629 rport->port_state = FC_PORTSTATE_ONLINE; 2630 if (fci->f->dd_fcrport_size) 2631 rport->dd_data = &rport[1]; 2632 rport->channel = channel; 2633 rport->fast_io_fail_tmo = -1; 2634 2635 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2636 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2637 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2638 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2639 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2640 2641 spin_lock_irqsave(shost->host_lock, flags); 2642 2643 rport->number = fc_host->next_rport_number++; 2644 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) 2645 rport->scsi_target_id = fc_host->next_target_id++; 2646 else 2647 rport->scsi_target_id = -1; 2648 list_add_tail(&rport->peers, &fc_host->rports); 2649 get_device(&shost->shost_gendev); /* for fc_host->rport list */ 2650 2651 spin_unlock_irqrestore(shost->host_lock, flags); 2652 2653 dev = &rport->dev; 2654 device_initialize(dev); /* takes self reference */ 2655 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2656 dev->release = fc_rport_dev_release; 2657 dev_set_name(dev, "rport-%d:%d-%d", 2658 shost->host_no, channel, rport->number); 2659 transport_setup_device(dev); 2660 2661 error = device_add(dev); 2662 if (error) { 2663 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2664 goto delete_rport; 2665 } 2666 transport_add_device(dev); 2667 transport_configure_device(dev); 2668 2669 fc_bsg_rportadd(shost, rport); 2670 /* ignore any bsg add error - we just can't do sgio */ 2671 2672 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2673 /* initiate a scan of the target */ 2674 rport->flags |= FC_RPORT_SCAN_PENDING; 2675 scsi_queue_work(shost, &rport->scan_work); 2676 } 2677 2678 return rport; 2679 2680 delete_rport: 2681 transport_destroy_device(dev); 2682 spin_lock_irqsave(shost->host_lock, flags); 2683 list_del(&rport->peers); 2684 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2685 spin_unlock_irqrestore(shost->host_lock, flags); 2686 put_device(dev->parent); 2687 kfree(rport); 2688 return NULL; 2689 } 2690 2691 /** 2692 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2693 * @shost: scsi host the remote port is connected to. 2694 * @channel: Channel on shost port connected to. 2695 * @ids: The world wide names, fc address, and FC4 port 2696 * roles for the remote port. 2697 * 2698 * The LLDD calls this routine to notify the transport of the existence 2699 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2700 * of the port, it's FC address (port_id), and the FC4 roles that are 2701 * active for the port. 2702 * 2703 * For ports that are FCP targets (aka scsi targets), the FC transport 2704 * maintains consistent target id bindings on behalf of the LLDD. 2705 * A consistent target id binding is an assignment of a target id to 2706 * a remote port identifier, which persists while the scsi host is 2707 * attached. The remote port can disappear, then later reappear, and 2708 * it's target id assignment remains the same. This allows for shifts 2709 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2710 * changes to the scsi subsystem which is based on scsi host number and 2711 * target id values. Bindings are only valid during the attachment of 2712 * the scsi host. If the host detaches, then later re-attaches, target 2713 * id bindings may change. 2714 * 2715 * This routine is responsible for returning a remote port structure. 2716 * The routine will search the list of remote ports it maintains 2717 * internally on behalf of consistent target id mappings. If found, the 2718 * remote port structure will be reused. Otherwise, a new remote port 2719 * structure will be allocated. 2720 * 2721 * Whenever a remote port is allocated, a new fc_remote_port class 2722 * device is created. 2723 * 2724 * Should not be called from interrupt context. 2725 * 2726 * Notes: 2727 * This routine assumes no locks are held on entry. 2728 */ 2729 struct fc_rport * 2730 fc_remote_port_add(struct Scsi_Host *shost, int channel, 2731 struct fc_rport_identifiers *ids) 2732 { 2733 struct fc_internal *fci = to_fc_internal(shost->transportt); 2734 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2735 struct fc_rport *rport; 2736 unsigned long flags; 2737 int match = 0; 2738 2739 /* ensure any stgt delete functions are done */ 2740 fc_flush_work(shost); 2741 2742 /* 2743 * Search the list of "active" rports, for an rport that has been 2744 * deleted, but we've held off the real delete while the target 2745 * is in a "blocked" state. 2746 */ 2747 spin_lock_irqsave(shost->host_lock, flags); 2748 2749 list_for_each_entry(rport, &fc_host->rports, peers) { 2750 2751 if ((rport->port_state == FC_PORTSTATE_BLOCKED) && 2752 (rport->channel == channel)) { 2753 2754 switch (fc_host->tgtid_bind_type) { 2755 case FC_TGTID_BIND_BY_WWPN: 2756 case FC_TGTID_BIND_NONE: 2757 if (rport->port_name == ids->port_name) 2758 match = 1; 2759 break; 2760 case FC_TGTID_BIND_BY_WWNN: 2761 if (rport->node_name == ids->node_name) 2762 match = 1; 2763 break; 2764 case FC_TGTID_BIND_BY_ID: 2765 if (rport->port_id == ids->port_id) 2766 match = 1; 2767 break; 2768 } 2769 2770 if (match) { 2771 2772 memcpy(&rport->node_name, &ids->node_name, 2773 sizeof(rport->node_name)); 2774 memcpy(&rport->port_name, &ids->port_name, 2775 sizeof(rport->port_name)); 2776 rport->port_id = ids->port_id; 2777 2778 rport->port_state = FC_PORTSTATE_ONLINE; 2779 rport->roles = ids->roles; 2780 2781 spin_unlock_irqrestore(shost->host_lock, flags); 2782 2783 if (fci->f->dd_fcrport_size) 2784 memset(rport->dd_data, 0, 2785 fci->f->dd_fcrport_size); 2786 2787 /* 2788 * If we were not a target, cancel the 2789 * io terminate and rport timers, and 2790 * we're done. 2791 * 2792 * If we were a target, but our new role 2793 * doesn't indicate a target, leave the 2794 * timers running expecting the role to 2795 * change as the target fully logs in. If 2796 * it doesn't, the target will be torn down. 2797 * 2798 * If we were a target, and our role shows 2799 * we're still a target, cancel the timers 2800 * and kick off a scan. 2801 */ 2802 2803 /* was a target, not in roles */ 2804 if ((rport->scsi_target_id != -1) && 2805 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2806 return rport; 2807 2808 /* 2809 * Stop the fail io and dev_loss timers. 2810 * If they flush, the port_state will 2811 * be checked and will NOOP the function. 2812 */ 2813 if (!cancel_delayed_work(&rport->fail_io_work)) 2814 fc_flush_devloss(shost); 2815 if (!cancel_delayed_work(&rport->dev_loss_work)) 2816 fc_flush_devloss(shost); 2817 2818 spin_lock_irqsave(shost->host_lock, flags); 2819 2820 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2821 FC_RPORT_DEVLOSS_PENDING | 2822 FC_RPORT_DEVLOSS_CALLBK_DONE); 2823 2824 spin_unlock_irqrestore(shost->host_lock, flags); 2825 2826 /* if target, initiate a scan */ 2827 if (rport->scsi_target_id != -1) { 2828 scsi_target_unblock(&rport->dev, 2829 SDEV_RUNNING); 2830 spin_lock_irqsave(shost->host_lock, 2831 flags); 2832 rport->flags |= FC_RPORT_SCAN_PENDING; 2833 scsi_queue_work(shost, 2834 &rport->scan_work); 2835 spin_unlock_irqrestore(shost->host_lock, 2836 flags); 2837 } 2838 2839 fc_bsg_goose_queue(rport); 2840 2841 return rport; 2842 } 2843 } 2844 } 2845 2846 /* 2847 * Search the bindings array 2848 * Note: if never a FCP target, you won't be on this list 2849 */ 2850 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2851 2852 /* search for a matching consistent binding */ 2853 2854 list_for_each_entry(rport, &fc_host->rport_bindings, 2855 peers) { 2856 if (rport->channel != channel) 2857 continue; 2858 2859 switch (fc_host->tgtid_bind_type) { 2860 case FC_TGTID_BIND_BY_WWPN: 2861 if (rport->port_name == ids->port_name) 2862 match = 1; 2863 break; 2864 case FC_TGTID_BIND_BY_WWNN: 2865 if (rport->node_name == ids->node_name) 2866 match = 1; 2867 break; 2868 case FC_TGTID_BIND_BY_ID: 2869 if (rport->port_id == ids->port_id) 2870 match = 1; 2871 break; 2872 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2873 break; 2874 } 2875 2876 if (match) { 2877 list_move_tail(&rport->peers, &fc_host->rports); 2878 break; 2879 } 2880 } 2881 2882 if (match) { 2883 memcpy(&rport->node_name, &ids->node_name, 2884 sizeof(rport->node_name)); 2885 memcpy(&rport->port_name, &ids->port_name, 2886 sizeof(rport->port_name)); 2887 rport->port_id = ids->port_id; 2888 rport->roles = ids->roles; 2889 rport->port_state = FC_PORTSTATE_ONLINE; 2890 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2891 2892 if (fci->f->dd_fcrport_size) 2893 memset(rport->dd_data, 0, 2894 fci->f->dd_fcrport_size); 2895 spin_unlock_irqrestore(shost->host_lock, flags); 2896 2897 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) { 2898 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 2899 2900 /* initiate a scan of the target */ 2901 spin_lock_irqsave(shost->host_lock, flags); 2902 rport->flags |= FC_RPORT_SCAN_PENDING; 2903 scsi_queue_work(shost, &rport->scan_work); 2904 spin_unlock_irqrestore(shost->host_lock, flags); 2905 } 2906 return rport; 2907 } 2908 } 2909 2910 spin_unlock_irqrestore(shost->host_lock, flags); 2911 2912 /* No consistent binding found - create new remote port entry */ 2913 rport = fc_rport_create(shost, channel, ids); 2914 2915 return rport; 2916 } 2917 EXPORT_SYMBOL(fc_remote_port_add); 2918 2919 2920 /** 2921 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2922 * @rport: The remote port that no longer exists 2923 * 2924 * The LLDD calls this routine to notify the transport that a remote 2925 * port is no longer part of the topology. Note: Although a port 2926 * may no longer be part of the topology, it may persist in the remote 2927 * ports displayed by the fc_host. We do this under 2 conditions: 2928 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2929 * This allows the port to temporarily disappear, then reappear without 2930 * disrupting the SCSI device tree attached to it. During the "blocked" 2931 * period the port will still exist. 2932 * 2) If the port was a scsi target and disappears for longer than we 2933 * expect, we'll delete the port and the tear down the SCSI device tree 2934 * attached to it. However, we want to semi-persist the target id assigned 2935 * to that port if it eventually does exist. The port structure will 2936 * remain (although with minimal information) so that the target id 2937 * bindings remails. 2938 * 2939 * If the remote port is not an FCP Target, it will be fully torn down 2940 * and deallocated, including the fc_remote_port class device. 2941 * 2942 * If the remote port is an FCP Target, the port will be placed in a 2943 * temporary blocked state. From the LLDD's perspective, the rport no 2944 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2945 * exists, but all sdevs on it are blocked from further I/O. The following 2946 * is then expected. 2947 * 2948 * If the remote port does not return (signaled by a LLDD call to 2949 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2950 * scsi target is removed - killing all outstanding i/o and removing the 2951 * scsi devices attached ot it. The port structure will be marked Not 2952 * Present and be partially cleared, leaving only enough information to 2953 * recognize the remote port relative to the scsi target id binding if 2954 * it later appears. The port will remain as long as there is a valid 2955 * binding (e.g. until the user changes the binding type or unloads the 2956 * scsi host with the binding). 2957 * 2958 * If the remote port returns within the dev_loss_tmo value (and matches 2959 * according to the target id binding type), the port structure will be 2960 * reused. If it is no longer a SCSI target, the target will be torn 2961 * down. If it continues to be a SCSI target, then the target will be 2962 * unblocked (allowing i/o to be resumed), and a scan will be activated 2963 * to ensure that all luns are detected. 2964 * 2965 * Called from normal process context only - cannot be called from interrupt. 2966 * 2967 * Notes: 2968 * This routine assumes no locks are held on entry. 2969 */ 2970 void 2971 fc_remote_port_delete(struct fc_rport *rport) 2972 { 2973 struct Scsi_Host *shost = rport_to_shost(rport); 2974 unsigned long timeout = rport->dev_loss_tmo; 2975 unsigned long flags; 2976 2977 /* 2978 * No need to flush the fc_host work_q's, as all adds are synchronous. 2979 * 2980 * We do need to reclaim the rport scan work element, so eventually 2981 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2982 * there's still a scan pending. 2983 */ 2984 2985 spin_lock_irqsave(shost->host_lock, flags); 2986 2987 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2988 spin_unlock_irqrestore(shost->host_lock, flags); 2989 return; 2990 } 2991 2992 /* 2993 * In the past, we if this was not an FCP-Target, we would 2994 * unconditionally just jump to deleting the rport. 2995 * However, rports can be used as node containers by the LLDD, 2996 * and its not appropriate to just terminate the rport at the 2997 * first sign of a loss in connectivity. The LLDD may want to 2998 * send ELS traffic to re-validate the login. If the rport is 2999 * immediately deleted, it makes it inappropriate for a node 3000 * container. 3001 * So... we now unconditionally wait dev_loss_tmo before 3002 * destroying an rport. 3003 */ 3004 3005 rport->port_state = FC_PORTSTATE_BLOCKED; 3006 3007 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3008 3009 spin_unlock_irqrestore(shost->host_lock, flags); 3010 3011 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && 3012 shost->active_mode & MODE_TARGET) 3013 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); 3014 3015 scsi_target_block(&rport->dev); 3016 3017 /* see if we need to kill io faster than waiting for device loss */ 3018 if ((rport->fast_io_fail_tmo != -1) && 3019 (rport->fast_io_fail_tmo < timeout)) 3020 fc_queue_devloss_work(shost, &rport->fail_io_work, 3021 rport->fast_io_fail_tmo * HZ); 3022 3023 /* cap the length the devices can be blocked until they are deleted */ 3024 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3025 } 3026 EXPORT_SYMBOL(fc_remote_port_delete); 3027 3028 /** 3029 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3030 * @rport: The remote port that changed. 3031 * @roles: New roles for this port. 3032 * 3033 * Description: The LLDD calls this routine to notify the transport that the 3034 * roles on a remote port may have changed. The largest effect of this is 3035 * if a port now becomes a FCP Target, it must be allocated a 3036 * scsi target id. If the port is no longer a FCP target, any 3037 * scsi target id value assigned to it will persist in case the 3038 * role changes back to include FCP Target. No changes in the scsi 3039 * midlayer will be invoked if the role changes (in the expectation 3040 * that the role will be resumed. If it doesn't normal error processing 3041 * will take place). 3042 * 3043 * Should not be called from interrupt context. 3044 * 3045 * Notes: 3046 * This routine assumes no locks are held on entry. 3047 */ 3048 void 3049 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3050 { 3051 struct Scsi_Host *shost = rport_to_shost(rport); 3052 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3053 unsigned long flags; 3054 int create = 0; 3055 int ret; 3056 3057 spin_lock_irqsave(shost->host_lock, flags); 3058 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3059 if (rport->scsi_target_id == -1) { 3060 rport->scsi_target_id = fc_host->next_target_id++; 3061 create = 1; 3062 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3063 create = 1; 3064 } else if (shost->active_mode & MODE_TARGET) { 3065 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, 3066 (char *)&rport->node_name); 3067 if (ret) 3068 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", 3069 ret); 3070 } 3071 3072 rport->roles = roles; 3073 3074 spin_unlock_irqrestore(shost->host_lock, flags); 3075 3076 if (create) { 3077 /* 3078 * There may have been a delete timer running on the 3079 * port. Ensure that it is cancelled as we now know 3080 * the port is an FCP Target. 3081 * Note: we know the rport is exists and in an online 3082 * state as the LLDD would not have had an rport 3083 * reference to pass us. 3084 * 3085 * Take no action on the del_timer failure as the state 3086 * machine state change will validate the 3087 * transaction. 3088 */ 3089 if (!cancel_delayed_work(&rport->fail_io_work)) 3090 fc_flush_devloss(shost); 3091 if (!cancel_delayed_work(&rport->dev_loss_work)) 3092 fc_flush_devloss(shost); 3093 3094 spin_lock_irqsave(shost->host_lock, flags); 3095 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3096 FC_RPORT_DEVLOSS_PENDING | 3097 FC_RPORT_DEVLOSS_CALLBK_DONE); 3098 spin_unlock_irqrestore(shost->host_lock, flags); 3099 3100 /* ensure any stgt delete functions are done */ 3101 fc_flush_work(shost); 3102 3103 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3104 /* initiate a scan of the target */ 3105 spin_lock_irqsave(shost->host_lock, flags); 3106 rport->flags |= FC_RPORT_SCAN_PENDING; 3107 scsi_queue_work(shost, &rport->scan_work); 3108 spin_unlock_irqrestore(shost->host_lock, flags); 3109 } 3110 } 3111 EXPORT_SYMBOL(fc_remote_port_rolechg); 3112 3113 /** 3114 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3115 * @work: rport target that failed to reappear in the allotted time. 3116 * 3117 * Description: An attempt to delete a remote port blocks, and if it fails 3118 * to return in the allotted time this gets called. 3119 */ 3120 static void 3121 fc_timeout_deleted_rport(struct work_struct *work) 3122 { 3123 struct fc_rport *rport = 3124 container_of(work, struct fc_rport, dev_loss_work.work); 3125 struct Scsi_Host *shost = rport_to_shost(rport); 3126 struct fc_internal *i = to_fc_internal(shost->transportt); 3127 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3128 unsigned long flags; 3129 int do_callback = 0; 3130 3131 spin_lock_irqsave(shost->host_lock, flags); 3132 3133 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3134 3135 /* 3136 * If the port is ONLINE, then it came back. If it was a SCSI 3137 * target, validate it still is. If not, tear down the 3138 * scsi_target on it. 3139 */ 3140 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3141 (rport->scsi_target_id != -1) && 3142 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3143 dev_printk(KERN_ERR, &rport->dev, 3144 "blocked FC remote port time out: no longer" 3145 " a FCP target, removing starget\n"); 3146 spin_unlock_irqrestore(shost->host_lock, flags); 3147 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3148 fc_queue_work(shost, &rport->stgt_delete_work); 3149 return; 3150 } 3151 3152 /* NOOP state - we're flushing workq's */ 3153 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3154 spin_unlock_irqrestore(shost->host_lock, flags); 3155 dev_printk(KERN_ERR, &rport->dev, 3156 "blocked FC remote port time out: leaving" 3157 " rport%s alone\n", 3158 (rport->scsi_target_id != -1) ? " and starget" : ""); 3159 return; 3160 } 3161 3162 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3163 (rport->scsi_target_id == -1)) { 3164 list_del(&rport->peers); 3165 rport->port_state = FC_PORTSTATE_DELETED; 3166 dev_printk(KERN_ERR, &rport->dev, 3167 "blocked FC remote port time out: removing" 3168 " rport%s\n", 3169 (rport->scsi_target_id != -1) ? " and starget" : ""); 3170 fc_queue_work(shost, &rport->rport_delete_work); 3171 spin_unlock_irqrestore(shost->host_lock, flags); 3172 return; 3173 } 3174 3175 dev_printk(KERN_ERR, &rport->dev, 3176 "blocked FC remote port time out: removing target and " 3177 "saving binding\n"); 3178 3179 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3180 3181 /* 3182 * Note: We do not remove or clear the hostdata area. This allows 3183 * host-specific target data to persist along with the 3184 * scsi_target_id. It's up to the host to manage it's hostdata area. 3185 */ 3186 3187 /* 3188 * Reinitialize port attributes that may change if the port comes back. 3189 */ 3190 rport->maxframe_size = -1; 3191 rport->supported_classes = FC_COS_UNSPECIFIED; 3192 rport->roles = FC_PORT_ROLE_UNKNOWN; 3193 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3194 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3195 3196 /* 3197 * Pre-emptively kill I/O rather than waiting for the work queue 3198 * item to teardown the starget. (FCOE libFC folks prefer this 3199 * and to have the rport_port_id still set when it's done). 3200 */ 3201 spin_unlock_irqrestore(shost->host_lock, flags); 3202 fc_terminate_rport_io(rport); 3203 3204 spin_lock_irqsave(shost->host_lock, flags); 3205 3206 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3207 3208 /* remove the identifiers that aren't used in the consisting binding */ 3209 switch (fc_host->tgtid_bind_type) { 3210 case FC_TGTID_BIND_BY_WWPN: 3211 rport->node_name = -1; 3212 rport->port_id = -1; 3213 break; 3214 case FC_TGTID_BIND_BY_WWNN: 3215 rport->port_name = -1; 3216 rport->port_id = -1; 3217 break; 3218 case FC_TGTID_BIND_BY_ID: 3219 rport->node_name = -1; 3220 rport->port_name = -1; 3221 break; 3222 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3223 break; 3224 } 3225 3226 /* 3227 * As this only occurs if the remote port (scsi target) 3228 * went away and didn't come back - we'll remove 3229 * all attached scsi devices. 3230 */ 3231 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3232 fc_queue_work(shost, &rport->stgt_delete_work); 3233 3234 do_callback = 1; 3235 } 3236 3237 spin_unlock_irqrestore(shost->host_lock, flags); 3238 3239 /* 3240 * Notify the driver that the rport is now dead. The LLDD will 3241 * also guarantee that any communication to the rport is terminated 3242 * 3243 * Note: we set the CALLBK_DONE flag above to correspond 3244 */ 3245 if (do_callback && i->f->dev_loss_tmo_callbk) 3246 i->f->dev_loss_tmo_callbk(rport); 3247 } 3248 3249 3250 /** 3251 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3252 * @work: rport to terminate io on. 3253 * 3254 * Notes: Only requests the failure of the io, not that all are flushed 3255 * prior to returning. 3256 */ 3257 static void 3258 fc_timeout_fail_rport_io(struct work_struct *work) 3259 { 3260 struct fc_rport *rport = 3261 container_of(work, struct fc_rport, fail_io_work.work); 3262 3263 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3264 return; 3265 3266 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3267 fc_terminate_rport_io(rport); 3268 } 3269 3270 /** 3271 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3272 * @work: remote port to be scanned. 3273 */ 3274 static void 3275 fc_scsi_scan_rport(struct work_struct *work) 3276 { 3277 struct fc_rport *rport = 3278 container_of(work, struct fc_rport, scan_work); 3279 struct Scsi_Host *shost = rport_to_shost(rport); 3280 struct fc_internal *i = to_fc_internal(shost->transportt); 3281 unsigned long flags; 3282 3283 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3284 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3285 !(i->f->disable_target_scan)) { 3286 scsi_scan_target(&rport->dev, rport->channel, 3287 rport->scsi_target_id, SCAN_WILD_CARD, 1); 3288 } 3289 3290 spin_lock_irqsave(shost->host_lock, flags); 3291 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3292 spin_unlock_irqrestore(shost->host_lock, flags); 3293 } 3294 3295 /** 3296 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3297 * @cmnd: SCSI command that scsi_eh is trying to recover 3298 * 3299 * This routine can be called from a FC LLD scsi_eh callback. It 3300 * blocks the scsi_eh thread until the fc_rport leaves the 3301 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3302 * necessary to avoid the scsi_eh failing recovery actions for blocked 3303 * rports which would lead to offlined SCSI devices. 3304 * 3305 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3306 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3307 * passed back to scsi_eh. 3308 */ 3309 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3310 { 3311 struct Scsi_Host *shost = cmnd->device->host; 3312 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3313 unsigned long flags; 3314 3315 spin_lock_irqsave(shost->host_lock, flags); 3316 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3317 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3318 spin_unlock_irqrestore(shost->host_lock, flags); 3319 msleep(1000); 3320 spin_lock_irqsave(shost->host_lock, flags); 3321 } 3322 spin_unlock_irqrestore(shost->host_lock, flags); 3323 3324 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3325 return FAST_IO_FAIL; 3326 3327 return 0; 3328 } 3329 EXPORT_SYMBOL(fc_block_scsi_eh); 3330 3331 /** 3332 * fc_vport_setup - allocates and creates a FC virtual port. 3333 * @shost: scsi host the virtual port is connected to. 3334 * @channel: Channel on shost port connected to. 3335 * @pdev: parent device for vport 3336 * @ids: The world wide names, FC4 port roles, etc for 3337 * the virtual port. 3338 * @ret_vport: The pointer to the created vport. 3339 * 3340 * Allocates and creates the vport structure, calls the parent host 3341 * to instantiate the vport, the completes w/ class and sysfs creation. 3342 * 3343 * Notes: 3344 * This routine assumes no locks are held on entry. 3345 */ 3346 static int 3347 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3348 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3349 { 3350 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3351 struct fc_internal *fci = to_fc_internal(shost->transportt); 3352 struct fc_vport *vport; 3353 struct device *dev; 3354 unsigned long flags; 3355 size_t size; 3356 int error; 3357 3358 *ret_vport = NULL; 3359 3360 if ( ! fci->f->vport_create) 3361 return -ENOENT; 3362 3363 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3364 vport = kzalloc(size, GFP_KERNEL); 3365 if (unlikely(!vport)) { 3366 printk(KERN_ERR "%s: allocation failure\n", __func__); 3367 return -ENOMEM; 3368 } 3369 3370 vport->vport_state = FC_VPORT_UNKNOWN; 3371 vport->vport_last_state = FC_VPORT_UNKNOWN; 3372 vport->node_name = ids->node_name; 3373 vport->port_name = ids->port_name; 3374 vport->roles = ids->roles; 3375 vport->vport_type = ids->vport_type; 3376 if (fci->f->dd_fcvport_size) 3377 vport->dd_data = &vport[1]; 3378 vport->shost = shost; 3379 vport->channel = channel; 3380 vport->flags = FC_VPORT_CREATING; 3381 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3382 3383 spin_lock_irqsave(shost->host_lock, flags); 3384 3385 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3386 spin_unlock_irqrestore(shost->host_lock, flags); 3387 kfree(vport); 3388 return -ENOSPC; 3389 } 3390 fc_host->npiv_vports_inuse++; 3391 vport->number = fc_host->next_vport_number++; 3392 list_add_tail(&vport->peers, &fc_host->vports); 3393 get_device(&shost->shost_gendev); /* for fc_host->vport list */ 3394 3395 spin_unlock_irqrestore(shost->host_lock, flags); 3396 3397 dev = &vport->dev; 3398 device_initialize(dev); /* takes self reference */ 3399 dev->parent = get_device(pdev); /* takes parent reference */ 3400 dev->release = fc_vport_dev_release; 3401 dev_set_name(dev, "vport-%d:%d-%d", 3402 shost->host_no, channel, vport->number); 3403 transport_setup_device(dev); 3404 3405 error = device_add(dev); 3406 if (error) { 3407 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3408 goto delete_vport; 3409 } 3410 transport_add_device(dev); 3411 transport_configure_device(dev); 3412 3413 error = fci->f->vport_create(vport, ids->disable); 3414 if (error) { 3415 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3416 goto delete_vport_all; 3417 } 3418 3419 /* 3420 * if the parent isn't the physical adapter's Scsi_Host, ensure 3421 * the Scsi_Host at least contains ia symlink to the vport. 3422 */ 3423 if (pdev != &shost->shost_gendev) { 3424 error = sysfs_create_link(&shost->shost_gendev.kobj, 3425 &dev->kobj, dev_name(dev)); 3426 if (error) 3427 printk(KERN_ERR 3428 "%s: Cannot create vport symlinks for " 3429 "%s, err=%d\n", 3430 __func__, dev_name(dev), error); 3431 } 3432 spin_lock_irqsave(shost->host_lock, flags); 3433 vport->flags &= ~FC_VPORT_CREATING; 3434 spin_unlock_irqrestore(shost->host_lock, flags); 3435 3436 dev_printk(KERN_NOTICE, pdev, 3437 "%s created via shost%d channel %d\n", dev_name(dev), 3438 shost->host_no, channel); 3439 3440 *ret_vport = vport; 3441 3442 return 0; 3443 3444 delete_vport_all: 3445 transport_remove_device(dev); 3446 device_del(dev); 3447 delete_vport: 3448 transport_destroy_device(dev); 3449 spin_lock_irqsave(shost->host_lock, flags); 3450 list_del(&vport->peers); 3451 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3452 fc_host->npiv_vports_inuse--; 3453 spin_unlock_irqrestore(shost->host_lock, flags); 3454 put_device(dev->parent); 3455 kfree(vport); 3456 3457 return error; 3458 } 3459 3460 /** 3461 * fc_vport_create - Admin App or LLDD requests creation of a vport 3462 * @shost: scsi host the virtual port is connected to. 3463 * @channel: channel on shost port connected to. 3464 * @ids: The world wide names, FC4 port roles, etc for 3465 * the virtual port. 3466 * 3467 * Notes: 3468 * This routine assumes no locks are held on entry. 3469 */ 3470 struct fc_vport * 3471 fc_vport_create(struct Scsi_Host *shost, int channel, 3472 struct fc_vport_identifiers *ids) 3473 { 3474 int stat; 3475 struct fc_vport *vport; 3476 3477 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3478 ids, &vport); 3479 return stat ? NULL : vport; 3480 } 3481 EXPORT_SYMBOL(fc_vport_create); 3482 3483 /** 3484 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3485 * @vport: fc_vport to be terminated 3486 * 3487 * Calls the LLDD vport_delete() function, then deallocates and removes 3488 * the vport from the shost and object tree. 3489 * 3490 * Notes: 3491 * This routine assumes no locks are held on entry. 3492 */ 3493 int 3494 fc_vport_terminate(struct fc_vport *vport) 3495 { 3496 struct Scsi_Host *shost = vport_to_shost(vport); 3497 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3498 struct fc_internal *i = to_fc_internal(shost->transportt); 3499 struct device *dev = &vport->dev; 3500 unsigned long flags; 3501 int stat; 3502 3503 if (i->f->vport_delete) 3504 stat = i->f->vport_delete(vport); 3505 else 3506 stat = -ENOENT; 3507 3508 spin_lock_irqsave(shost->host_lock, flags); 3509 vport->flags &= ~FC_VPORT_DELETING; 3510 if (!stat) { 3511 vport->flags |= FC_VPORT_DELETED; 3512 list_del(&vport->peers); 3513 fc_host->npiv_vports_inuse--; 3514 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3515 } 3516 spin_unlock_irqrestore(shost->host_lock, flags); 3517 3518 if (stat) 3519 return stat; 3520 3521 if (dev->parent != &shost->shost_gendev) 3522 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3523 transport_remove_device(dev); 3524 device_del(dev); 3525 transport_destroy_device(dev); 3526 3527 /* 3528 * Removing our self-reference should mean our 3529 * release function gets called, which will drop the remaining 3530 * parent reference and free the data structure. 3531 */ 3532 put_device(dev); /* for self-reference */ 3533 3534 return 0; /* SUCCESS */ 3535 } 3536 EXPORT_SYMBOL(fc_vport_terminate); 3537 3538 /** 3539 * fc_vport_sched_delete - workq-based delete request for a vport 3540 * @work: vport to be deleted. 3541 */ 3542 static void 3543 fc_vport_sched_delete(struct work_struct *work) 3544 { 3545 struct fc_vport *vport = 3546 container_of(work, struct fc_vport, vport_delete_work); 3547 int stat; 3548 3549 stat = fc_vport_terminate(vport); 3550 if (stat) 3551 dev_printk(KERN_ERR, vport->dev.parent, 3552 "%s: %s could not be deleted created via " 3553 "shost%d channel %d - error %d\n", __func__, 3554 dev_name(&vport->dev), vport->shost->host_no, 3555 vport->channel, stat); 3556 } 3557 3558 3559 /* 3560 * BSG support 3561 */ 3562 3563 3564 /** 3565 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job 3566 * @job: fc_bsg_job that is to be torn down 3567 */ 3568 static void 3569 fc_destroy_bsgjob(struct fc_bsg_job *job) 3570 { 3571 unsigned long flags; 3572 3573 spin_lock_irqsave(&job->job_lock, flags); 3574 if (job->ref_cnt) { 3575 spin_unlock_irqrestore(&job->job_lock, flags); 3576 return; 3577 } 3578 spin_unlock_irqrestore(&job->job_lock, flags); 3579 3580 put_device(job->dev); /* release reference for the request */ 3581 3582 kfree(job->request_payload.sg_list); 3583 kfree(job->reply_payload.sg_list); 3584 kfree(job); 3585 } 3586 3587 /** 3588 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has 3589 * completed 3590 * @job: fc_bsg_job that is complete 3591 */ 3592 static void 3593 fc_bsg_jobdone(struct fc_bsg_job *job) 3594 { 3595 struct request *req = job->req; 3596 struct request *rsp = req->next_rq; 3597 int err; 3598 3599 err = job->req->errors = job->reply->result; 3600 3601 if (err < 0) 3602 /* we're only returning the result field in the reply */ 3603 job->req->sense_len = sizeof(uint32_t); 3604 else 3605 job->req->sense_len = job->reply_len; 3606 3607 /* we assume all request payload was transferred, residual == 0 */ 3608 req->resid_len = 0; 3609 3610 if (rsp) { 3611 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); 3612 3613 /* set reply (bidi) residual */ 3614 rsp->resid_len -= min(job->reply->reply_payload_rcv_len, 3615 rsp->resid_len); 3616 } 3617 blk_complete_request(req); 3618 } 3619 3620 /** 3621 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests 3622 * @rq: BSG request that holds the job to be destroyed 3623 */ 3624 static void fc_bsg_softirq_done(struct request *rq) 3625 { 3626 struct fc_bsg_job *job = rq->special; 3627 unsigned long flags; 3628 3629 spin_lock_irqsave(&job->job_lock, flags); 3630 job->state_flags |= FC_RQST_STATE_DONE; 3631 job->ref_cnt--; 3632 spin_unlock_irqrestore(&job->job_lock, flags); 3633 3634 blk_end_request_all(rq, rq->errors); 3635 fc_destroy_bsgjob(job); 3636 } 3637 3638 /** 3639 * fc_bsg_job_timeout - handler for when a bsg request timesout 3640 * @req: request that timed out 3641 */ 3642 static enum blk_eh_timer_return 3643 fc_bsg_job_timeout(struct request *req) 3644 { 3645 struct fc_bsg_job *job = (void *) req->special; 3646 struct Scsi_Host *shost = job->shost; 3647 struct fc_internal *i = to_fc_internal(shost->transportt); 3648 unsigned long flags; 3649 int err = 0, done = 0; 3650 3651 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) 3652 return BLK_EH_RESET_TIMER; 3653 3654 spin_lock_irqsave(&job->job_lock, flags); 3655 if (job->state_flags & FC_RQST_STATE_DONE) 3656 done = 1; 3657 else 3658 job->ref_cnt++; 3659 spin_unlock_irqrestore(&job->job_lock, flags); 3660 3661 if (!done && i->f->bsg_timeout) { 3662 /* call LLDD to abort the i/o as it has timed out */ 3663 err = i->f->bsg_timeout(job); 3664 if (err == -EAGAIN) { 3665 job->ref_cnt--; 3666 return BLK_EH_RESET_TIMER; 3667 } else if (err) 3668 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3669 "abort failed with status %d\n", err); 3670 } 3671 3672 /* the blk_end_sync_io() doesn't check the error */ 3673 if (done) 3674 return BLK_EH_NOT_HANDLED; 3675 else 3676 return BLK_EH_HANDLED; 3677 } 3678 3679 static int 3680 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) 3681 { 3682 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); 3683 3684 BUG_ON(!req->nr_phys_segments); 3685 3686 buf->sg_list = kzalloc(sz, GFP_KERNEL); 3687 if (!buf->sg_list) 3688 return -ENOMEM; 3689 sg_init_table(buf->sg_list, req->nr_phys_segments); 3690 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); 3691 buf->payload_len = blk_rq_bytes(req); 3692 return 0; 3693 } 3694 3695 3696 /** 3697 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the 3698 * bsg request 3699 * @shost: SCSI Host corresponding to the bsg object 3700 * @rport: (optional) FC Remote Port corresponding to the bsg object 3701 * @req: BSG request that needs a job structure 3702 */ 3703 static int 3704 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, 3705 struct request *req) 3706 { 3707 struct fc_internal *i = to_fc_internal(shost->transportt); 3708 struct request *rsp = req->next_rq; 3709 struct fc_bsg_job *job; 3710 int ret; 3711 3712 BUG_ON(req->special); 3713 3714 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, 3715 GFP_KERNEL); 3716 if (!job) 3717 return -ENOMEM; 3718 3719 /* 3720 * Note: this is a bit silly. 3721 * The request gets formatted as a SGIO v4 ioctl request, which 3722 * then gets reformatted as a blk request, which then gets 3723 * reformatted as a fc bsg request. And on completion, we have 3724 * to wrap return results such that SGIO v4 thinks it was a scsi 3725 * status. I hope this was all worth it. 3726 */ 3727 3728 req->special = job; 3729 job->shost = shost; 3730 job->rport = rport; 3731 job->req = req; 3732 if (i->f->dd_bsg_size) 3733 job->dd_data = (void *)&job[1]; 3734 spin_lock_init(&job->job_lock); 3735 job->request = (struct fc_bsg_request *)req->cmd; 3736 job->request_len = req->cmd_len; 3737 job->reply = req->sense; 3738 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer 3739 * allocated */ 3740 if (req->bio) { 3741 ret = fc_bsg_map_buffer(&job->request_payload, req); 3742 if (ret) 3743 goto failjob_rls_job; 3744 } 3745 if (rsp && rsp->bio) { 3746 ret = fc_bsg_map_buffer(&job->reply_payload, rsp); 3747 if (ret) 3748 goto failjob_rls_rqst_payload; 3749 } 3750 job->job_done = fc_bsg_jobdone; 3751 if (rport) 3752 job->dev = &rport->dev; 3753 else 3754 job->dev = &shost->shost_gendev; 3755 get_device(job->dev); /* take a reference for the request */ 3756 3757 job->ref_cnt = 1; 3758 3759 return 0; 3760 3761 3762 failjob_rls_rqst_payload: 3763 kfree(job->request_payload.sg_list); 3764 failjob_rls_job: 3765 kfree(job); 3766 return -ENOMEM; 3767 } 3768 3769 3770 enum fc_dispatch_result { 3771 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ 3772 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ 3773 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ 3774 }; 3775 3776 3777 /** 3778 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3779 * @q: fc host request queue 3780 * @shost: scsi host rport attached to 3781 * @job: bsg job to be processed 3782 */ 3783 static enum fc_dispatch_result 3784 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3785 struct fc_bsg_job *job) 3786 { 3787 struct fc_internal *i = to_fc_internal(shost->transportt); 3788 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3789 int ret; 3790 3791 /* Validate the host command */ 3792 switch (job->request->msgcode) { 3793 case FC_BSG_HST_ADD_RPORT: 3794 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3795 break; 3796 3797 case FC_BSG_HST_DEL_RPORT: 3798 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3799 break; 3800 3801 case FC_BSG_HST_ELS_NOLOGIN: 3802 cmdlen += sizeof(struct fc_bsg_host_els); 3803 /* there better be a xmt and rcv payloads */ 3804 if ((!job->request_payload.payload_len) || 3805 (!job->reply_payload.payload_len)) { 3806 ret = -EINVAL; 3807 goto fail_host_msg; 3808 } 3809 break; 3810 3811 case FC_BSG_HST_CT: 3812 cmdlen += sizeof(struct fc_bsg_host_ct); 3813 /* there better be xmt and rcv payloads */ 3814 if ((!job->request_payload.payload_len) || 3815 (!job->reply_payload.payload_len)) { 3816 ret = -EINVAL; 3817 goto fail_host_msg; 3818 } 3819 break; 3820 3821 case FC_BSG_HST_VENDOR: 3822 cmdlen += sizeof(struct fc_bsg_host_vendor); 3823 if ((shost->hostt->vendor_id == 0L) || 3824 (job->request->rqst_data.h_vendor.vendor_id != 3825 shost->hostt->vendor_id)) { 3826 ret = -ESRCH; 3827 goto fail_host_msg; 3828 } 3829 break; 3830 3831 default: 3832 ret = -EBADR; 3833 goto fail_host_msg; 3834 } 3835 3836 /* check if we really have all the request data needed */ 3837 if (job->request_len < cmdlen) { 3838 ret = -ENOMSG; 3839 goto fail_host_msg; 3840 } 3841 3842 ret = i->f->bsg_request(job); 3843 if (!ret) 3844 return FC_DISPATCH_UNLOCKED; 3845 3846 fail_host_msg: 3847 /* return the errno failure code as the only status */ 3848 BUG_ON(job->reply_len < sizeof(uint32_t)); 3849 job->reply->reply_payload_rcv_len = 0; 3850 job->reply->result = ret; 3851 job->reply_len = sizeof(uint32_t); 3852 fc_bsg_jobdone(job); 3853 return FC_DISPATCH_UNLOCKED; 3854 } 3855 3856 3857 /* 3858 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3859 * @rport: rport to be restarted 3860 */ 3861 static void 3862 fc_bsg_goose_queue(struct fc_rport *rport) 3863 { 3864 if (!rport->rqst_q) 3865 return; 3866 3867 /* 3868 * This get/put dance makes no sense 3869 */ 3870 get_device(&rport->dev); 3871 blk_run_queue_async(rport->rqst_q); 3872 put_device(&rport->dev); 3873 } 3874 3875 /** 3876 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3877 * @q: rport request queue 3878 * @shost: scsi host rport attached to 3879 * @rport: rport request destined to 3880 * @job: bsg job to be processed 3881 */ 3882 static enum fc_dispatch_result 3883 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3884 struct fc_rport *rport, struct fc_bsg_job *job) 3885 { 3886 struct fc_internal *i = to_fc_internal(shost->transportt); 3887 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3888 int ret; 3889 3890 /* Validate the rport command */ 3891 switch (job->request->msgcode) { 3892 case FC_BSG_RPT_ELS: 3893 cmdlen += sizeof(struct fc_bsg_rport_els); 3894 goto check_bidi; 3895 3896 case FC_BSG_RPT_CT: 3897 cmdlen += sizeof(struct fc_bsg_rport_ct); 3898 check_bidi: 3899 /* there better be xmt and rcv payloads */ 3900 if ((!job->request_payload.payload_len) || 3901 (!job->reply_payload.payload_len)) { 3902 ret = -EINVAL; 3903 goto fail_rport_msg; 3904 } 3905 break; 3906 default: 3907 ret = -EBADR; 3908 goto fail_rport_msg; 3909 } 3910 3911 /* check if we really have all the request data needed */ 3912 if (job->request_len < cmdlen) { 3913 ret = -ENOMSG; 3914 goto fail_rport_msg; 3915 } 3916 3917 ret = i->f->bsg_request(job); 3918 if (!ret) 3919 return FC_DISPATCH_UNLOCKED; 3920 3921 fail_rport_msg: 3922 /* return the errno failure code as the only status */ 3923 BUG_ON(job->reply_len < sizeof(uint32_t)); 3924 job->reply->reply_payload_rcv_len = 0; 3925 job->reply->result = ret; 3926 job->reply_len = sizeof(uint32_t); 3927 fc_bsg_jobdone(job); 3928 return FC_DISPATCH_UNLOCKED; 3929 } 3930 3931 3932 /** 3933 * fc_bsg_request_handler - generic handler for bsg requests 3934 * @q: request queue to manage 3935 * @shost: Scsi_Host related to the bsg object 3936 * @rport: FC remote port related to the bsg object (optional) 3937 * @dev: device structure for bsg object 3938 */ 3939 static void 3940 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, 3941 struct fc_rport *rport, struct device *dev) 3942 { 3943 struct request *req; 3944 struct fc_bsg_job *job; 3945 enum fc_dispatch_result ret; 3946 3947 if (!get_device(dev)) 3948 return; 3949 3950 while (1) { 3951 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && 3952 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3953 break; 3954 3955 req = blk_fetch_request(q); 3956 if (!req) 3957 break; 3958 3959 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { 3960 req->errors = -ENXIO; 3961 spin_unlock_irq(q->queue_lock); 3962 blk_end_request_all(req, -ENXIO); 3963 spin_lock_irq(q->queue_lock); 3964 continue; 3965 } 3966 3967 spin_unlock_irq(q->queue_lock); 3968 3969 ret = fc_req_to_bsgjob(shost, rport, req); 3970 if (ret) { 3971 req->errors = ret; 3972 blk_end_request_all(req, ret); 3973 spin_lock_irq(q->queue_lock); 3974 continue; 3975 } 3976 3977 job = req->special; 3978 3979 /* check if we have the msgcode value at least */ 3980 if (job->request_len < sizeof(uint32_t)) { 3981 BUG_ON(job->reply_len < sizeof(uint32_t)); 3982 job->reply->reply_payload_rcv_len = 0; 3983 job->reply->result = -ENOMSG; 3984 job->reply_len = sizeof(uint32_t); 3985 fc_bsg_jobdone(job); 3986 spin_lock_irq(q->queue_lock); 3987 continue; 3988 } 3989 3990 /* the dispatch routines will unlock the queue_lock */ 3991 if (rport) 3992 ret = fc_bsg_rport_dispatch(q, shost, rport, job); 3993 else 3994 ret = fc_bsg_host_dispatch(q, shost, job); 3995 3996 /* did dispatcher hit state that can't process any more */ 3997 if (ret == FC_DISPATCH_BREAK) 3998 break; 3999 4000 /* did dispatcher had released the lock */ 4001 if (ret == FC_DISPATCH_UNLOCKED) 4002 spin_lock_irq(q->queue_lock); 4003 } 4004 4005 spin_unlock_irq(q->queue_lock); 4006 put_device(dev); 4007 spin_lock_irq(q->queue_lock); 4008 } 4009 4010 4011 /** 4012 * fc_bsg_host_handler - handler for bsg requests for a fc host 4013 * @q: fc host request queue 4014 */ 4015 static void 4016 fc_bsg_host_handler(struct request_queue *q) 4017 { 4018 struct Scsi_Host *shost = q->queuedata; 4019 4020 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); 4021 } 4022 4023 4024 /** 4025 * fc_bsg_rport_handler - handler for bsg requests for a fc rport 4026 * @q: rport request queue 4027 */ 4028 static void 4029 fc_bsg_rport_handler(struct request_queue *q) 4030 { 4031 struct fc_rport *rport = q->queuedata; 4032 struct Scsi_Host *shost = rport_to_shost(rport); 4033 4034 fc_bsg_request_handler(q, shost, rport, &rport->dev); 4035 } 4036 4037 4038 /** 4039 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4040 * @shost: shost for fc_host 4041 * @fc_host: fc_host adding the structures to 4042 */ 4043 static int 4044 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4045 { 4046 struct device *dev = &shost->shost_gendev; 4047 struct fc_internal *i = to_fc_internal(shost->transportt); 4048 struct request_queue *q; 4049 int err; 4050 char bsg_name[20]; 4051 4052 fc_host->rqst_q = NULL; 4053 4054 if (!i->f->bsg_request) 4055 return -ENOTSUPP; 4056 4057 snprintf(bsg_name, sizeof(bsg_name), 4058 "fc_host%d", shost->host_no); 4059 4060 q = __scsi_alloc_queue(shost, fc_bsg_host_handler); 4061 if (!q) { 4062 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4063 "initialize - no request queue\n", 4064 shost->host_no); 4065 return -ENOMEM; 4066 } 4067 4068 q->queuedata = shost; 4069 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4070 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4071 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4072 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4073 4074 err = bsg_register_queue(q, dev, bsg_name, NULL); 4075 if (err) { 4076 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4077 "initialize - register queue\n", 4078 shost->host_no); 4079 blk_cleanup_queue(q); 4080 return err; 4081 } 4082 4083 fc_host->rqst_q = q; 4084 return 0; 4085 } 4086 4087 4088 /** 4089 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4090 * @shost: shost that rport is attached to 4091 * @rport: rport that the bsg hooks are being attached to 4092 */ 4093 static int 4094 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4095 { 4096 struct device *dev = &rport->dev; 4097 struct fc_internal *i = to_fc_internal(shost->transportt); 4098 struct request_queue *q; 4099 int err; 4100 4101 rport->rqst_q = NULL; 4102 4103 if (!i->f->bsg_request) 4104 return -ENOTSUPP; 4105 4106 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); 4107 if (!q) { 4108 printk(KERN_ERR "%s: bsg interface failed to " 4109 "initialize - no request queue\n", 4110 dev->kobj.name); 4111 return -ENOMEM; 4112 } 4113 4114 q->queuedata = rport; 4115 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4116 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4117 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4118 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4119 4120 err = bsg_register_queue(q, dev, NULL, NULL); 4121 if (err) { 4122 printk(KERN_ERR "%s: bsg interface failed to " 4123 "initialize - register queue\n", 4124 dev->kobj.name); 4125 blk_cleanup_queue(q); 4126 return err; 4127 } 4128 4129 rport->rqst_q = q; 4130 return 0; 4131 } 4132 4133 4134 /** 4135 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4136 * @q: the request_queue that is to be torn down. 4137 * 4138 * Notes: 4139 * Before unregistering the queue empty any requests that are blocked 4140 * 4141 * 4142 */ 4143 static void 4144 fc_bsg_remove(struct request_queue *q) 4145 { 4146 if (q) { 4147 bsg_unregister_queue(q); 4148 blk_cleanup_queue(q); 4149 } 4150 } 4151 4152 4153 /* Original Author: Martin Hicks */ 4154 MODULE_AUTHOR("James Smart"); 4155 MODULE_DESCRIPTION("FC Transport Attributes"); 4156 MODULE_LICENSE("GPL"); 4157 4158 module_init(fc_transport_init); 4159 module_exit(fc_transport_exit); 4160