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 <linux/netlink.h> 39 #include <net/netlink.h> 40 #include <scsi/scsi_netlink_fc.h> 41 #include <scsi/scsi_bsg_fc.h> 42 #include "scsi_priv.h" 43 #include "scsi_transport_fc_internal.h" 44 45 static int fc_queue_work(struct Scsi_Host *, struct work_struct *); 46 static void fc_vport_sched_delete(struct work_struct *work); 47 static int fc_vport_setup(struct Scsi_Host *shost, int channel, 48 struct device *pdev, struct fc_vport_identifiers *ids, 49 struct fc_vport **vport); 50 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); 51 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); 52 static void fc_bsg_remove(struct request_queue *); 53 static void fc_bsg_goose_queue(struct fc_rport *); 54 55 /* 56 * Module Parameters 57 */ 58 59 /* 60 * dev_loss_tmo: the default number of seconds that the FC transport 61 * should insulate the loss of a remote port. 62 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 63 */ 64 static unsigned int fc_dev_loss_tmo = 60; /* seconds */ 65 66 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); 67 MODULE_PARM_DESC(dev_loss_tmo, 68 "Maximum number of seconds that the FC transport should" 69 " insulate the loss of a remote port. Once this value is" 70 " exceeded, the scsi target is removed. Value should be" 71 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" 72 " fast_io_fail_tmo is not set."); 73 74 /* 75 * Redefine so that we can have same named attributes in the 76 * sdev/starget/host objects. 77 */ 78 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 79 struct device_attribute device_attr_##_prefix##_##_name = \ 80 __ATTR(_name,_mode,_show,_store) 81 82 #define fc_enum_name_search(title, table_type, table) \ 83 static const char *get_fc_##title##_name(enum table_type table_key) \ 84 { \ 85 int i; \ 86 char *name = NULL; \ 87 \ 88 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 89 if (table[i].value == table_key) { \ 90 name = table[i].name; \ 91 break; \ 92 } \ 93 } \ 94 return name; \ 95 } 96 97 #define fc_enum_name_match(title, table_type, table) \ 98 static int get_fc_##title##_match(const char *table_key, \ 99 enum table_type *value) \ 100 { \ 101 int i; \ 102 \ 103 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 104 if (strncmp(table_key, table[i].name, \ 105 table[i].matchlen) == 0) { \ 106 *value = table[i].value; \ 107 return 0; /* success */ \ 108 } \ 109 } \ 110 return 1; /* failure */ \ 111 } 112 113 114 /* Convert fc_port_type values to ascii string name */ 115 static struct { 116 enum fc_port_type value; 117 char *name; 118 } fc_port_type_names[] = { 119 { FC_PORTTYPE_UNKNOWN, "Unknown" }, 120 { FC_PORTTYPE_OTHER, "Other" }, 121 { FC_PORTTYPE_NOTPRESENT, "Not Present" }, 122 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, 123 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, 124 { FC_PORTTYPE_LPORT, "LPort (private loop)" }, 125 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, 126 { FC_PORTTYPE_NPIV, "NPIV VPORT" }, 127 }; 128 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) 129 #define FC_PORTTYPE_MAX_NAMELEN 50 130 131 /* Reuse fc_port_type enum function for vport_type */ 132 #define get_fc_vport_type_name get_fc_port_type_name 133 134 135 /* Convert fc_host_event_code values to ascii string name */ 136 static const struct { 137 enum fc_host_event_code value; 138 char *name; 139 } fc_host_event_code_names[] = { 140 { FCH_EVT_LIP, "lip" }, 141 { FCH_EVT_LINKUP, "link_up" }, 142 { FCH_EVT_LINKDOWN, "link_down" }, 143 { FCH_EVT_LIPRESET, "lip_reset" }, 144 { FCH_EVT_RSCN, "rscn" }, 145 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, 146 { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, 147 { FCH_EVT_PORT_ONLINE, "port_online" }, 148 { FCH_EVT_PORT_OFFLINE, "port_offline" }, 149 { FCH_EVT_PORT_FABRIC, "port_fabric" }, 150 { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, 151 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 152 }; 153 fc_enum_name_search(host_event_code, fc_host_event_code, 154 fc_host_event_code_names) 155 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 156 157 158 /* Convert fc_port_state values to ascii string name */ 159 static struct { 160 enum fc_port_state value; 161 char *name; 162 } fc_port_state_names[] = { 163 { FC_PORTSTATE_UNKNOWN, "Unknown" }, 164 { FC_PORTSTATE_NOTPRESENT, "Not Present" }, 165 { FC_PORTSTATE_ONLINE, "Online" }, 166 { FC_PORTSTATE_OFFLINE, "Offline" }, 167 { FC_PORTSTATE_BLOCKED, "Blocked" }, 168 { FC_PORTSTATE_BYPASSED, "Bypassed" }, 169 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, 170 { FC_PORTSTATE_LINKDOWN, "Linkdown" }, 171 { FC_PORTSTATE_ERROR, "Error" }, 172 { FC_PORTSTATE_LOOPBACK, "Loopback" }, 173 { FC_PORTSTATE_DELETED, "Deleted" }, 174 }; 175 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 176 #define FC_PORTSTATE_MAX_NAMELEN 20 177 178 179 /* Convert fc_vport_state values to ascii string name */ 180 static struct { 181 enum fc_vport_state value; 182 char *name; 183 } fc_vport_state_names[] = { 184 { FC_VPORT_UNKNOWN, "Unknown" }, 185 { FC_VPORT_ACTIVE, "Active" }, 186 { FC_VPORT_DISABLED, "Disabled" }, 187 { FC_VPORT_LINKDOWN, "Linkdown" }, 188 { FC_VPORT_INITIALIZING, "Initializing" }, 189 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 190 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 191 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 192 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 193 { FC_VPORT_FAILED, "VPort Failed" }, 194 }; 195 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 196 #define FC_VPORTSTATE_MAX_NAMELEN 24 197 198 /* Reuse fc_vport_state enum function for vport_last_state */ 199 #define get_fc_vport_last_state_name get_fc_vport_state_name 200 201 202 /* Convert fc_tgtid_binding_type values to ascii string name */ 203 static const struct { 204 enum fc_tgtid_binding_type value; 205 char *name; 206 int matchlen; 207 } fc_tgtid_binding_type_names[] = { 208 { FC_TGTID_BIND_NONE, "none", 4 }, 209 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 210 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 211 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 212 }; 213 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 214 fc_tgtid_binding_type_names) 215 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 216 fc_tgtid_binding_type_names) 217 #define FC_BINDTYPE_MAX_NAMELEN 30 218 219 220 #define fc_bitfield_name_search(title, table) \ 221 static ssize_t \ 222 get_fc_##title##_names(u32 table_key, char *buf) \ 223 { \ 224 char *prefix = ""; \ 225 ssize_t len = 0; \ 226 int i; \ 227 \ 228 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 229 if (table[i].value & table_key) { \ 230 len += sprintf(buf + len, "%s%s", \ 231 prefix, table[i].name); \ 232 prefix = ", "; \ 233 } \ 234 } \ 235 len += sprintf(buf + len, "\n"); \ 236 return len; \ 237 } 238 239 240 /* Convert FC_COS bit values to ascii string name */ 241 static const struct { 242 u32 value; 243 char *name; 244 } fc_cos_names[] = { 245 { FC_COS_CLASS1, "Class 1" }, 246 { FC_COS_CLASS2, "Class 2" }, 247 { FC_COS_CLASS3, "Class 3" }, 248 { FC_COS_CLASS4, "Class 4" }, 249 { FC_COS_CLASS6, "Class 6" }, 250 }; 251 fc_bitfield_name_search(cos, fc_cos_names) 252 253 254 /* Convert FC_PORTSPEED bit values to ascii string name */ 255 static const struct { 256 u32 value; 257 char *name; 258 } fc_port_speed_names[] = { 259 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 260 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 261 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 262 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 263 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 264 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 265 { FC_PORTSPEED_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(fc_host->work_q_name, 0, 0); 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 = 448 alloc_workqueue(fc_host->devloss_work_q_name, 0, 0); 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, skblen; 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 skblen = NLMSG_SPACE(len); 547 548 skb = alloc_skb(skblen, GFP_KERNEL); 549 if (!skb) { 550 err = -ENOBUFS; 551 goto send_fail; 552 } 553 554 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, 555 skblen - sizeof(*nlh), 0); 556 if (!nlh) { 557 err = -ENOBUFS; 558 goto send_fail_skb; 559 } 560 event = NLMSG_DATA(nlh); 561 562 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 563 FC_NL_ASYNC_EVENT, len); 564 event->seconds = get_seconds(); 565 event->vendor_id = 0; 566 event->host_no = shost->host_no; 567 event->event_datalen = sizeof(u32); /* bytes */ 568 event->event_num = event_number; 569 event->event_code = event_code; 570 event->event_data = event_data; 571 572 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 573 GFP_KERNEL); 574 return; 575 576 send_fail_skb: 577 kfree_skb(skb); 578 send_fail: 579 name = get_fc_host_event_code_name(event_code); 580 printk(KERN_WARNING 581 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 582 __func__, shost->host_no, 583 (name) ? name : "<unknown>", event_data, err); 584 return; 585 } 586 EXPORT_SYMBOL(fc_host_post_event); 587 588 589 /** 590 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host 591 * @shost: host the event occurred on 592 * @event_number: fc event number obtained from get_fc_event_number() 593 * @data_len: amount, in bytes, of vendor unique data 594 * @data_buf: pointer to vendor unique data 595 * @vendor_id: Vendor id 596 * 597 * Notes: 598 * This routine assumes no locks are held on entry. 599 */ 600 void 601 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 602 u32 data_len, char * data_buf, u64 vendor_id) 603 { 604 struct sk_buff *skb; 605 struct nlmsghdr *nlh; 606 struct fc_nl_event *event; 607 u32 len, skblen; 608 int err; 609 610 if (!scsi_nl_sock) { 611 err = -ENOENT; 612 goto send_vendor_fail; 613 } 614 615 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 616 skblen = NLMSG_SPACE(len); 617 618 skb = alloc_skb(skblen, GFP_KERNEL); 619 if (!skb) { 620 err = -ENOBUFS; 621 goto send_vendor_fail; 622 } 623 624 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, 625 skblen - sizeof(*nlh), 0); 626 if (!nlh) { 627 err = -ENOBUFS; 628 goto send_vendor_fail_skb; 629 } 630 event = NLMSG_DATA(nlh); 631 632 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 633 FC_NL_ASYNC_EVENT, len); 634 event->seconds = get_seconds(); 635 event->vendor_id = vendor_id; 636 event->host_no = shost->host_no; 637 event->event_datalen = data_len; /* bytes */ 638 event->event_num = event_number; 639 event->event_code = FCH_EVT_VENDOR_UNIQUE; 640 memcpy(&event->event_data, data_buf, data_len); 641 642 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 643 GFP_KERNEL); 644 return; 645 646 send_vendor_fail_skb: 647 kfree_skb(skb); 648 send_vendor_fail: 649 printk(KERN_WARNING 650 "%s: Dropped Event : host %d vendor_unique - err %d\n", 651 __func__, shost->host_no, err); 652 return; 653 } 654 EXPORT_SYMBOL(fc_host_post_vendor_event); 655 656 657 658 static __init int fc_transport_init(void) 659 { 660 int error; 661 662 atomic_set(&fc_event_seq, 0); 663 664 error = transport_class_register(&fc_host_class); 665 if (error) 666 return error; 667 error = transport_class_register(&fc_vport_class); 668 if (error) 669 goto unreg_host_class; 670 error = transport_class_register(&fc_rport_class); 671 if (error) 672 goto unreg_vport_class; 673 error = transport_class_register(&fc_transport_class); 674 if (error) 675 goto unreg_rport_class; 676 return 0; 677 678 unreg_rport_class: 679 transport_class_unregister(&fc_rport_class); 680 unreg_vport_class: 681 transport_class_unregister(&fc_vport_class); 682 unreg_host_class: 683 transport_class_unregister(&fc_host_class); 684 return error; 685 } 686 687 static void __exit fc_transport_exit(void) 688 { 689 transport_class_unregister(&fc_transport_class); 690 transport_class_unregister(&fc_rport_class); 691 transport_class_unregister(&fc_host_class); 692 transport_class_unregister(&fc_vport_class); 693 } 694 695 /* 696 * FC Remote Port Attribute Management 697 */ 698 699 #define fc_rport_show_function(field, format_string, sz, cast) \ 700 static ssize_t \ 701 show_fc_rport_##field (struct device *dev, \ 702 struct device_attribute *attr, char *buf) \ 703 { \ 704 struct fc_rport *rport = transport_class_to_rport(dev); \ 705 struct Scsi_Host *shost = rport_to_shost(rport); \ 706 struct fc_internal *i = to_fc_internal(shost->transportt); \ 707 if ((i->f->get_rport_##field) && \ 708 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 709 (rport->port_state == FC_PORTSTATE_DELETED) || \ 710 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 711 i->f->get_rport_##field(rport); \ 712 return snprintf(buf, sz, format_string, cast rport->field); \ 713 } 714 715 #define fc_rport_store_function(field) \ 716 static ssize_t \ 717 store_fc_rport_##field(struct device *dev, \ 718 struct device_attribute *attr, \ 719 const char *buf, size_t count) \ 720 { \ 721 int val; \ 722 struct fc_rport *rport = transport_class_to_rport(dev); \ 723 struct Scsi_Host *shost = rport_to_shost(rport); \ 724 struct fc_internal *i = to_fc_internal(shost->transportt); \ 725 char *cp; \ 726 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 727 (rport->port_state == FC_PORTSTATE_DELETED) || \ 728 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 729 return -EBUSY; \ 730 val = simple_strtoul(buf, &cp, 0); \ 731 if (*cp && (*cp != '\n')) \ 732 return -EINVAL; \ 733 i->f->set_rport_##field(rport, val); \ 734 return count; \ 735 } 736 737 #define fc_rport_rd_attr(field, format_string, sz) \ 738 fc_rport_show_function(field, format_string, sz, ) \ 739 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 740 show_fc_rport_##field, NULL) 741 742 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 743 fc_rport_show_function(field, format_string, sz, (cast)) \ 744 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 745 show_fc_rport_##field, NULL) 746 747 #define fc_rport_rw_attr(field, format_string, sz) \ 748 fc_rport_show_function(field, format_string, sz, ) \ 749 fc_rport_store_function(field) \ 750 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 751 show_fc_rport_##field, \ 752 store_fc_rport_##field) 753 754 755 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 756 static ssize_t \ 757 show_fc_rport_##field (struct device *dev, \ 758 struct device_attribute *attr, char *buf) \ 759 { \ 760 struct fc_rport *rport = transport_class_to_rport(dev); \ 761 return snprintf(buf, sz, format_string, cast rport->field); \ 762 } 763 764 #define fc_private_rport_rd_attr(field, format_string, sz) \ 765 fc_private_rport_show_function(field, format_string, sz, ) \ 766 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 767 show_fc_rport_##field, NULL) 768 769 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 770 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 771 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 772 show_fc_rport_##field, NULL) 773 774 775 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 776 static ssize_t \ 777 show_fc_rport_##title (struct device *dev, \ 778 struct device_attribute *attr, char *buf) \ 779 { \ 780 struct fc_rport *rport = transport_class_to_rport(dev); \ 781 const char *name; \ 782 name = get_fc_##title##_name(rport->title); \ 783 if (!name) \ 784 return -EINVAL; \ 785 return snprintf(buf, maxlen, "%s\n", name); \ 786 } \ 787 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 788 show_fc_rport_##title, NULL) 789 790 791 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 792 i->private_rport_attrs[count] = device_attr_rport_##field; \ 793 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 794 i->private_rport_attrs[count].store = NULL; \ 795 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 796 if (i->f->show_rport_##field) \ 797 count++ 798 799 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 800 i->private_rport_attrs[count] = device_attr_rport_##field; \ 801 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 802 i->private_rport_attrs[count].store = NULL; \ 803 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 804 count++ 805 806 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 807 i->private_rport_attrs[count] = device_attr_rport_##field; \ 808 if (!i->f->set_rport_##field) { \ 809 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 810 i->private_rport_attrs[count].store = NULL; \ 811 } \ 812 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 813 if (i->f->show_rport_##field) \ 814 count++ 815 816 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 817 { \ 818 i->private_rport_attrs[count] = device_attr_rport_##field; \ 819 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 820 count++; \ 821 } 822 823 824 /* The FC Transport Remote Port Attributes: */ 825 826 /* Fixed Remote Port Attributes */ 827 828 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 829 830 static ssize_t 831 show_fc_rport_supported_classes (struct device *dev, 832 struct device_attribute *attr, char *buf) 833 { 834 struct fc_rport *rport = transport_class_to_rport(dev); 835 if (rport->supported_classes == FC_COS_UNSPECIFIED) 836 return snprintf(buf, 20, "unspecified\n"); 837 return get_fc_cos_names(rport->supported_classes, buf); 838 } 839 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 840 show_fc_rport_supported_classes, NULL); 841 842 /* Dynamic Remote Port Attributes */ 843 844 /* 845 * dev_loss_tmo attribute 846 */ 847 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 848 { 849 char *cp; 850 851 *val = simple_strtoul(buf, &cp, 0); 852 if ((*cp && (*cp != '\n')) || (*val < 0)) 853 return -EINVAL; 854 /* 855 * Check for overflow; dev_loss_tmo is u32 856 */ 857 if (*val > UINT_MAX) 858 return -EINVAL; 859 860 return 0; 861 } 862 863 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 864 unsigned long val) 865 { 866 struct Scsi_Host *shost = rport_to_shost(rport); 867 struct fc_internal *i = to_fc_internal(shost->transportt); 868 869 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 870 (rport->port_state == FC_PORTSTATE_DELETED) || 871 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 872 return -EBUSY; 873 /* 874 * Check for overflow; dev_loss_tmo is u32 875 */ 876 if (val > UINT_MAX) 877 return -EINVAL; 878 879 /* 880 * If fast_io_fail is off we have to cap 881 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 882 */ 883 if (rport->fast_io_fail_tmo == -1 && 884 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 885 return -EINVAL; 886 887 i->f->set_rport_dev_loss_tmo(rport, val); 888 return 0; 889 } 890 891 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 892 static ssize_t 893 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 894 const char *buf, size_t count) 895 { 896 struct fc_rport *rport = transport_class_to_rport(dev); 897 unsigned long val; 898 int rc; 899 900 rc = fc_str_to_dev_loss(buf, &val); 901 if (rc) 902 return rc; 903 904 rc = fc_rport_set_dev_loss_tmo(rport, val); 905 if (rc) 906 return rc; 907 return count; 908 } 909 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 910 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 911 912 913 /* Private Remote Port Attributes */ 914 915 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 916 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 917 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 918 919 static ssize_t 920 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 921 char *buf) 922 { 923 struct fc_rport *rport = transport_class_to_rport(dev); 924 925 /* identify any roles that are port_id specific */ 926 if ((rport->port_id != -1) && 927 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 928 FC_WELLKNOWN_PORTID_MASK) { 929 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 930 case FC_FPORT_PORTID: 931 return snprintf(buf, 30, "Fabric Port\n"); 932 case FC_FABCTLR_PORTID: 933 return snprintf(buf, 30, "Fabric Controller\n"); 934 case FC_DIRSRVR_PORTID: 935 return snprintf(buf, 30, "Directory Server\n"); 936 case FC_TIMESRVR_PORTID: 937 return snprintf(buf, 30, "Time Server\n"); 938 case FC_MGMTSRVR_PORTID: 939 return snprintf(buf, 30, "Management Server\n"); 940 default: 941 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 942 } 943 } else { 944 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 945 return snprintf(buf, 20, "unknown\n"); 946 return get_fc_port_roles_names(rport->roles, buf); 947 } 948 } 949 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 950 show_fc_rport_roles, NULL); 951 952 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 953 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 954 955 /* 956 * fast_io_fail_tmo attribute 957 */ 958 static ssize_t 959 show_fc_rport_fast_io_fail_tmo (struct device *dev, 960 struct device_attribute *attr, char *buf) 961 { 962 struct fc_rport *rport = transport_class_to_rport(dev); 963 964 if (rport->fast_io_fail_tmo == -1) 965 return snprintf(buf, 5, "off\n"); 966 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 967 } 968 969 static ssize_t 970 store_fc_rport_fast_io_fail_tmo(struct device *dev, 971 struct device_attribute *attr, const char *buf, 972 size_t count) 973 { 974 int val; 975 char *cp; 976 struct fc_rport *rport = transport_class_to_rport(dev); 977 978 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 979 (rport->port_state == FC_PORTSTATE_DELETED) || 980 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 981 return -EBUSY; 982 if (strncmp(buf, "off", 3) == 0) 983 rport->fast_io_fail_tmo = -1; 984 else { 985 val = simple_strtoul(buf, &cp, 0); 986 if ((*cp && (*cp != '\n')) || (val < 0)) 987 return -EINVAL; 988 /* 989 * Cap fast_io_fail by dev_loss_tmo or 990 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 991 */ 992 if ((val >= rport->dev_loss_tmo) || 993 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 994 return -EINVAL; 995 996 rport->fast_io_fail_tmo = val; 997 } 998 return count; 999 } 1000 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 1001 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 1002 1003 1004 /* 1005 * FC SCSI Target Attribute Management 1006 */ 1007 1008 /* 1009 * Note: in the target show function we recognize when the remote 1010 * port is in the hierarchy and do not allow the driver to get 1011 * involved in sysfs functions. The driver only gets involved if 1012 * it's the "old" style that doesn't use rports. 1013 */ 1014 #define fc_starget_show_function(field, format_string, sz, cast) \ 1015 static ssize_t \ 1016 show_fc_starget_##field (struct device *dev, \ 1017 struct device_attribute *attr, char *buf) \ 1018 { \ 1019 struct scsi_target *starget = transport_class_to_starget(dev); \ 1020 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1021 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1022 struct fc_rport *rport = starget_to_rport(starget); \ 1023 if (rport) \ 1024 fc_starget_##field(starget) = rport->field; \ 1025 else if (i->f->get_starget_##field) \ 1026 i->f->get_starget_##field(starget); \ 1027 return snprintf(buf, sz, format_string, \ 1028 cast fc_starget_##field(starget)); \ 1029 } 1030 1031 #define fc_starget_rd_attr(field, format_string, sz) \ 1032 fc_starget_show_function(field, format_string, sz, ) \ 1033 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1034 show_fc_starget_##field, NULL) 1035 1036 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1037 fc_starget_show_function(field, format_string, sz, (cast)) \ 1038 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1039 show_fc_starget_##field, NULL) 1040 1041 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1042 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1043 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1044 i->private_starget_attrs[count].store = NULL; \ 1045 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1046 if (i->f->show_starget_##field) \ 1047 count++ 1048 1049 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1050 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1051 if (!i->f->set_starget_##field) { \ 1052 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1053 i->private_starget_attrs[count].store = NULL; \ 1054 } \ 1055 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1056 if (i->f->show_starget_##field) \ 1057 count++ 1058 1059 /* The FC Transport SCSI Target Attributes: */ 1060 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1061 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1062 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1063 1064 1065 /* 1066 * FC Virtual Port Attribute Management 1067 */ 1068 1069 #define fc_vport_show_function(field, format_string, sz, cast) \ 1070 static ssize_t \ 1071 show_fc_vport_##field (struct device *dev, \ 1072 struct device_attribute *attr, char *buf) \ 1073 { \ 1074 struct fc_vport *vport = transport_class_to_vport(dev); \ 1075 struct Scsi_Host *shost = vport_to_shost(vport); \ 1076 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1077 if ((i->f->get_vport_##field) && \ 1078 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1079 i->f->get_vport_##field(vport); \ 1080 return snprintf(buf, sz, format_string, cast vport->field); \ 1081 } 1082 1083 #define fc_vport_store_function(field) \ 1084 static ssize_t \ 1085 store_fc_vport_##field(struct device *dev, \ 1086 struct device_attribute *attr, \ 1087 const char *buf, size_t count) \ 1088 { \ 1089 int val; \ 1090 struct fc_vport *vport = transport_class_to_vport(dev); \ 1091 struct Scsi_Host *shost = vport_to_shost(vport); \ 1092 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1093 char *cp; \ 1094 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1095 return -EBUSY; \ 1096 val = simple_strtoul(buf, &cp, 0); \ 1097 if (*cp && (*cp != '\n')) \ 1098 return -EINVAL; \ 1099 i->f->set_vport_##field(vport, val); \ 1100 return count; \ 1101 } 1102 1103 #define fc_vport_store_str_function(field, slen) \ 1104 static ssize_t \ 1105 store_fc_vport_##field(struct device *dev, \ 1106 struct device_attribute *attr, \ 1107 const char *buf, size_t count) \ 1108 { \ 1109 struct fc_vport *vport = transport_class_to_vport(dev); \ 1110 struct Scsi_Host *shost = vport_to_shost(vport); \ 1111 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1112 unsigned int cnt=count; \ 1113 \ 1114 /* count may include a LF at end of string */ \ 1115 if (buf[cnt-1] == '\n') \ 1116 cnt--; \ 1117 if (cnt > ((slen) - 1)) \ 1118 return -EINVAL; \ 1119 memcpy(vport->field, buf, cnt); \ 1120 i->f->set_vport_##field(vport); \ 1121 return count; \ 1122 } 1123 1124 #define fc_vport_rd_attr(field, format_string, sz) \ 1125 fc_vport_show_function(field, format_string, sz, ) \ 1126 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1127 show_fc_vport_##field, NULL) 1128 1129 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1130 fc_vport_show_function(field, format_string, sz, (cast)) \ 1131 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1132 show_fc_vport_##field, NULL) 1133 1134 #define fc_vport_rw_attr(field, format_string, sz) \ 1135 fc_vport_show_function(field, format_string, sz, ) \ 1136 fc_vport_store_function(field) \ 1137 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1138 show_fc_vport_##field, \ 1139 store_fc_vport_##field) 1140 1141 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1142 static ssize_t \ 1143 show_fc_vport_##field (struct device *dev, \ 1144 struct device_attribute *attr, char *buf) \ 1145 { \ 1146 struct fc_vport *vport = transport_class_to_vport(dev); \ 1147 return snprintf(buf, sz, format_string, cast vport->field); \ 1148 } 1149 1150 #define fc_private_vport_store_u32_function(field) \ 1151 static ssize_t \ 1152 store_fc_vport_##field(struct device *dev, \ 1153 struct device_attribute *attr, \ 1154 const char *buf, size_t count) \ 1155 { \ 1156 u32 val; \ 1157 struct fc_vport *vport = transport_class_to_vport(dev); \ 1158 char *cp; \ 1159 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1160 return -EBUSY; \ 1161 val = simple_strtoul(buf, &cp, 0); \ 1162 if (*cp && (*cp != '\n')) \ 1163 return -EINVAL; \ 1164 vport->field = val; \ 1165 return count; \ 1166 } 1167 1168 1169 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1170 fc_private_vport_show_function(field, format_string, sz, ) \ 1171 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1172 show_fc_vport_##field, NULL) 1173 1174 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1175 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1176 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1177 show_fc_vport_##field, NULL) 1178 1179 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1180 fc_private_vport_show_function(field, format_string, sz, ) \ 1181 fc_private_vport_store_u32_function(field) \ 1182 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1183 show_fc_vport_##field, \ 1184 store_fc_vport_##field) 1185 1186 1187 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1188 static ssize_t \ 1189 show_fc_vport_##title (struct device *dev, \ 1190 struct device_attribute *attr, \ 1191 char *buf) \ 1192 { \ 1193 struct fc_vport *vport = transport_class_to_vport(dev); \ 1194 const char *name; \ 1195 name = get_fc_##title##_name(vport->title); \ 1196 if (!name) \ 1197 return -EINVAL; \ 1198 return snprintf(buf, maxlen, "%s\n", name); \ 1199 } \ 1200 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1201 show_fc_vport_##title, NULL) 1202 1203 1204 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1205 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1206 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1207 i->private_vport_attrs[count].store = NULL; \ 1208 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1209 if (i->f->get_##field) \ 1210 count++ 1211 /* NOTE: Above MACRO differs: checks function not show bit */ 1212 1213 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1214 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1215 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1216 i->private_vport_attrs[count].store = NULL; \ 1217 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1218 count++ 1219 1220 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1221 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1222 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1223 if (i->f->field) \ 1224 count++ 1225 /* NOTE: Above MACRO differs: checks function */ 1226 1227 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1228 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1229 if (!i->f->set_vport_##field) { \ 1230 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1231 i->private_vport_attrs[count].store = NULL; \ 1232 } \ 1233 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1234 count++ 1235 /* NOTE: Above MACRO differs: does not check show bit */ 1236 1237 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1238 { \ 1239 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1240 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1241 count++; \ 1242 } 1243 1244 1245 /* The FC Transport Virtual Port Attributes: */ 1246 1247 /* Fixed Virtual Port Attributes */ 1248 1249 /* Dynamic Virtual Port Attributes */ 1250 1251 /* Private Virtual Port Attributes */ 1252 1253 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1254 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1255 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1256 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1257 1258 static ssize_t 1259 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1260 char *buf) 1261 { 1262 struct fc_vport *vport = transport_class_to_vport(dev); 1263 1264 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1265 return snprintf(buf, 20, "unknown\n"); 1266 return get_fc_port_roles_names(vport->roles, buf); 1267 } 1268 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1269 1270 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1271 1272 fc_private_vport_show_function(symbolic_name, "%s\n", 1273 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1274 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1275 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1276 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1277 1278 static ssize_t 1279 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1280 const char *buf, size_t count) 1281 { 1282 struct fc_vport *vport = transport_class_to_vport(dev); 1283 struct Scsi_Host *shost = vport_to_shost(vport); 1284 unsigned long flags; 1285 1286 spin_lock_irqsave(shost->host_lock, flags); 1287 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1288 spin_unlock_irqrestore(shost->host_lock, flags); 1289 return -EBUSY; 1290 } 1291 vport->flags |= FC_VPORT_DELETING; 1292 spin_unlock_irqrestore(shost->host_lock, flags); 1293 1294 fc_queue_work(shost, &vport->vport_delete_work); 1295 return count; 1296 } 1297 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1298 NULL, store_fc_vport_delete); 1299 1300 1301 /* 1302 * Enable/Disable vport 1303 * Write "1" to disable, write "0" to enable 1304 */ 1305 static ssize_t 1306 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1307 const char *buf, 1308 size_t count) 1309 { 1310 struct fc_vport *vport = transport_class_to_vport(dev); 1311 struct Scsi_Host *shost = vport_to_shost(vport); 1312 struct fc_internal *i = to_fc_internal(shost->transportt); 1313 int stat; 1314 1315 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1316 return -EBUSY; 1317 1318 if (*buf == '0') { 1319 if (vport->vport_state != FC_VPORT_DISABLED) 1320 return -EALREADY; 1321 } else if (*buf == '1') { 1322 if (vport->vport_state == FC_VPORT_DISABLED) 1323 return -EALREADY; 1324 } else 1325 return -EINVAL; 1326 1327 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1328 return stat ? stat : count; 1329 } 1330 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1331 NULL, store_fc_vport_disable); 1332 1333 1334 /* 1335 * Host Attribute Management 1336 */ 1337 1338 #define fc_host_show_function(field, format_string, sz, cast) \ 1339 static ssize_t \ 1340 show_fc_host_##field (struct device *dev, \ 1341 struct device_attribute *attr, char *buf) \ 1342 { \ 1343 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1344 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1345 if (i->f->get_host_##field) \ 1346 i->f->get_host_##field(shost); \ 1347 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1348 } 1349 1350 #define fc_host_store_function(field) \ 1351 static ssize_t \ 1352 store_fc_host_##field(struct device *dev, \ 1353 struct device_attribute *attr, \ 1354 const char *buf, size_t count) \ 1355 { \ 1356 int val; \ 1357 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1358 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1359 char *cp; \ 1360 \ 1361 val = simple_strtoul(buf, &cp, 0); \ 1362 if (*cp && (*cp != '\n')) \ 1363 return -EINVAL; \ 1364 i->f->set_host_##field(shost, val); \ 1365 return count; \ 1366 } 1367 1368 #define fc_host_store_str_function(field, slen) \ 1369 static ssize_t \ 1370 store_fc_host_##field(struct device *dev, \ 1371 struct device_attribute *attr, \ 1372 const char *buf, size_t count) \ 1373 { \ 1374 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1375 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1376 unsigned int cnt=count; \ 1377 \ 1378 /* count may include a LF at end of string */ \ 1379 if (buf[cnt-1] == '\n') \ 1380 cnt--; \ 1381 if (cnt > ((slen) - 1)) \ 1382 return -EINVAL; \ 1383 memcpy(fc_host_##field(shost), buf, cnt); \ 1384 i->f->set_host_##field(shost); \ 1385 return count; \ 1386 } 1387 1388 #define fc_host_rd_attr(field, format_string, sz) \ 1389 fc_host_show_function(field, format_string, sz, ) \ 1390 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1391 show_fc_host_##field, NULL) 1392 1393 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1394 fc_host_show_function(field, format_string, sz, (cast)) \ 1395 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1396 show_fc_host_##field, NULL) 1397 1398 #define fc_host_rw_attr(field, format_string, sz) \ 1399 fc_host_show_function(field, format_string, sz, ) \ 1400 fc_host_store_function(field) \ 1401 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1402 show_fc_host_##field, \ 1403 store_fc_host_##field) 1404 1405 #define fc_host_rd_enum_attr(title, maxlen) \ 1406 static ssize_t \ 1407 show_fc_host_##title (struct device *dev, \ 1408 struct device_attribute *attr, char *buf) \ 1409 { \ 1410 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1411 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1412 const char *name; \ 1413 if (i->f->get_host_##title) \ 1414 i->f->get_host_##title(shost); \ 1415 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1416 if (!name) \ 1417 return -EINVAL; \ 1418 return snprintf(buf, maxlen, "%s\n", name); \ 1419 } \ 1420 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1421 1422 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1423 i->private_host_attrs[count] = device_attr_host_##field; \ 1424 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1425 i->private_host_attrs[count].store = NULL; \ 1426 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1427 if (i->f->show_host_##field) \ 1428 count++ 1429 1430 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1431 i->private_host_attrs[count] = device_attr_host_##field; \ 1432 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1433 i->private_host_attrs[count].store = NULL; \ 1434 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1435 count++ 1436 1437 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1438 i->private_host_attrs[count] = device_attr_host_##field; \ 1439 if (!i->f->set_host_##field) { \ 1440 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1441 i->private_host_attrs[count].store = NULL; \ 1442 } \ 1443 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1444 if (i->f->show_host_##field) \ 1445 count++ 1446 1447 1448 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1449 static ssize_t \ 1450 show_fc_host_##field (struct device *dev, \ 1451 struct device_attribute *attr, char *buf) \ 1452 { \ 1453 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1454 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1455 } 1456 1457 #define fc_private_host_rd_attr(field, format_string, sz) \ 1458 fc_private_host_show_function(field, format_string, sz, ) \ 1459 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1460 show_fc_host_##field, NULL) 1461 1462 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1463 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1464 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1465 show_fc_host_##field, NULL) 1466 1467 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1468 i->private_host_attrs[count] = device_attr_host_##field; \ 1469 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1470 i->private_host_attrs[count].store = NULL; \ 1471 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1472 count++ 1473 1474 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1475 { \ 1476 i->private_host_attrs[count] = device_attr_host_##field; \ 1477 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1478 count++; \ 1479 } 1480 1481 1482 /* Fixed Host Attributes */ 1483 1484 static ssize_t 1485 show_fc_host_supported_classes (struct device *dev, 1486 struct device_attribute *attr, char *buf) 1487 { 1488 struct Scsi_Host *shost = transport_class_to_shost(dev); 1489 1490 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1491 return snprintf(buf, 20, "unspecified\n"); 1492 1493 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1494 } 1495 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1496 show_fc_host_supported_classes, NULL); 1497 1498 static ssize_t 1499 show_fc_host_supported_fc4s (struct device *dev, 1500 struct device_attribute *attr, char *buf) 1501 { 1502 struct Scsi_Host *shost = transport_class_to_shost(dev); 1503 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1504 } 1505 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1506 show_fc_host_supported_fc4s, NULL); 1507 1508 static ssize_t 1509 show_fc_host_supported_speeds (struct device *dev, 1510 struct device_attribute *attr, char *buf) 1511 { 1512 struct Scsi_Host *shost = transport_class_to_shost(dev); 1513 1514 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1515 return snprintf(buf, 20, "unknown\n"); 1516 1517 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1518 } 1519 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1520 show_fc_host_supported_speeds, NULL); 1521 1522 1523 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1524 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1525 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1526 unsigned long long); 1527 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1528 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1529 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1530 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1531 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1532 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1533 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1534 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1535 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1536 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1537 1538 1539 /* Dynamic Host Attributes */ 1540 1541 static ssize_t 1542 show_fc_host_active_fc4s (struct device *dev, 1543 struct device_attribute *attr, char *buf) 1544 { 1545 struct Scsi_Host *shost = transport_class_to_shost(dev); 1546 struct fc_internal *i = to_fc_internal(shost->transportt); 1547 1548 if (i->f->get_host_active_fc4s) 1549 i->f->get_host_active_fc4s(shost); 1550 1551 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1552 } 1553 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1554 show_fc_host_active_fc4s, NULL); 1555 1556 static ssize_t 1557 show_fc_host_speed (struct device *dev, 1558 struct device_attribute *attr, char *buf) 1559 { 1560 struct Scsi_Host *shost = transport_class_to_shost(dev); 1561 struct fc_internal *i = to_fc_internal(shost->transportt); 1562 1563 if (i->f->get_host_speed) 1564 i->f->get_host_speed(shost); 1565 1566 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1567 return snprintf(buf, 20, "unknown\n"); 1568 1569 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1570 } 1571 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1572 show_fc_host_speed, NULL); 1573 1574 1575 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1576 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1577 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1578 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1579 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1580 1581 fc_private_host_show_function(system_hostname, "%s\n", 1582 FC_SYMBOLIC_NAME_SIZE + 1, ) 1583 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1584 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1585 show_fc_host_system_hostname, store_fc_host_system_hostname); 1586 1587 1588 /* Private Host Attributes */ 1589 1590 static ssize_t 1591 show_fc_private_host_tgtid_bind_type(struct device *dev, 1592 struct device_attribute *attr, char *buf) 1593 { 1594 struct Scsi_Host *shost = transport_class_to_shost(dev); 1595 const char *name; 1596 1597 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1598 if (!name) 1599 return -EINVAL; 1600 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1601 } 1602 1603 #define get_list_head_entry(pos, head, member) \ 1604 pos = list_entry((head)->next, typeof(*pos), member) 1605 1606 static ssize_t 1607 store_fc_private_host_tgtid_bind_type(struct device *dev, 1608 struct device_attribute *attr, const char *buf, size_t count) 1609 { 1610 struct Scsi_Host *shost = transport_class_to_shost(dev); 1611 struct fc_rport *rport; 1612 enum fc_tgtid_binding_type val; 1613 unsigned long flags; 1614 1615 if (get_fc_tgtid_bind_type_match(buf, &val)) 1616 return -EINVAL; 1617 1618 /* if changing bind type, purge all unused consistent bindings */ 1619 if (val != fc_host_tgtid_bind_type(shost)) { 1620 spin_lock_irqsave(shost->host_lock, flags); 1621 while (!list_empty(&fc_host_rport_bindings(shost))) { 1622 get_list_head_entry(rport, 1623 &fc_host_rport_bindings(shost), peers); 1624 list_del(&rport->peers); 1625 rport->port_state = FC_PORTSTATE_DELETED; 1626 fc_queue_work(shost, &rport->rport_delete_work); 1627 } 1628 spin_unlock_irqrestore(shost->host_lock, flags); 1629 } 1630 1631 fc_host_tgtid_bind_type(shost) = val; 1632 return count; 1633 } 1634 1635 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1636 show_fc_private_host_tgtid_bind_type, 1637 store_fc_private_host_tgtid_bind_type); 1638 1639 static ssize_t 1640 store_fc_private_host_issue_lip(struct device *dev, 1641 struct device_attribute *attr, const char *buf, size_t count) 1642 { 1643 struct Scsi_Host *shost = transport_class_to_shost(dev); 1644 struct fc_internal *i = to_fc_internal(shost->transportt); 1645 int ret; 1646 1647 /* ignore any data value written to the attribute */ 1648 if (i->f->issue_fc_host_lip) { 1649 ret = i->f->issue_fc_host_lip(shost); 1650 return ret ? ret: count; 1651 } 1652 1653 return -ENOENT; 1654 } 1655 1656 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1657 store_fc_private_host_issue_lip); 1658 1659 static ssize_t 1660 store_fc_private_host_dev_loss_tmo(struct device *dev, 1661 struct device_attribute *attr, 1662 const char *buf, size_t count) 1663 { 1664 struct Scsi_Host *shost = transport_class_to_shost(dev); 1665 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1666 struct fc_rport *rport; 1667 unsigned long val, flags; 1668 int rc; 1669 1670 rc = fc_str_to_dev_loss(buf, &val); 1671 if (rc) 1672 return rc; 1673 1674 fc_host_dev_loss_tmo(shost) = val; 1675 spin_lock_irqsave(shost->host_lock, flags); 1676 list_for_each_entry(rport, &fc_host->rports, peers) 1677 fc_rport_set_dev_loss_tmo(rport, val); 1678 spin_unlock_irqrestore(shost->host_lock, flags); 1679 return count; 1680 } 1681 1682 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 1683 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 1684 show_fc_host_dev_loss_tmo, 1685 store_fc_private_host_dev_loss_tmo); 1686 1687 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1688 1689 /* 1690 * Host Statistics Management 1691 */ 1692 1693 /* Show a given an attribute in the statistics group */ 1694 static ssize_t 1695 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1696 { 1697 struct Scsi_Host *shost = transport_class_to_shost(dev); 1698 struct fc_internal *i = to_fc_internal(shost->transportt); 1699 struct fc_host_statistics *stats; 1700 ssize_t ret = -ENOENT; 1701 1702 if (offset > sizeof(struct fc_host_statistics) || 1703 offset % sizeof(u64) != 0) 1704 WARN_ON(1); 1705 1706 if (i->f->get_fc_host_stats) { 1707 stats = (i->f->get_fc_host_stats)(shost); 1708 if (stats) 1709 ret = snprintf(buf, 20, "0x%llx\n", 1710 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1711 } 1712 return ret; 1713 } 1714 1715 1716 /* generate a read-only statistics attribute */ 1717 #define fc_host_statistic(name) \ 1718 static ssize_t show_fcstat_##name(struct device *cd, \ 1719 struct device_attribute *attr, \ 1720 char *buf) \ 1721 { \ 1722 return fc_stat_show(cd, buf, \ 1723 offsetof(struct fc_host_statistics, name)); \ 1724 } \ 1725 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1726 1727 fc_host_statistic(seconds_since_last_reset); 1728 fc_host_statistic(tx_frames); 1729 fc_host_statistic(tx_words); 1730 fc_host_statistic(rx_frames); 1731 fc_host_statistic(rx_words); 1732 fc_host_statistic(lip_count); 1733 fc_host_statistic(nos_count); 1734 fc_host_statistic(error_frames); 1735 fc_host_statistic(dumped_frames); 1736 fc_host_statistic(link_failure_count); 1737 fc_host_statistic(loss_of_sync_count); 1738 fc_host_statistic(loss_of_signal_count); 1739 fc_host_statistic(prim_seq_protocol_err_count); 1740 fc_host_statistic(invalid_tx_word_count); 1741 fc_host_statistic(invalid_crc_count); 1742 fc_host_statistic(fcp_input_requests); 1743 fc_host_statistic(fcp_output_requests); 1744 fc_host_statistic(fcp_control_requests); 1745 fc_host_statistic(fcp_input_megabytes); 1746 fc_host_statistic(fcp_output_megabytes); 1747 fc_host_statistic(fcp_packet_alloc_failures); 1748 fc_host_statistic(fcp_packet_aborts); 1749 fc_host_statistic(fcp_frame_alloc_failures); 1750 fc_host_statistic(fc_no_free_exch); 1751 fc_host_statistic(fc_no_free_exch_xid); 1752 fc_host_statistic(fc_xid_not_found); 1753 fc_host_statistic(fc_xid_busy); 1754 fc_host_statistic(fc_seq_not_found); 1755 fc_host_statistic(fc_non_bls_resp); 1756 1757 static ssize_t 1758 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1759 const char *buf, size_t count) 1760 { 1761 struct Scsi_Host *shost = transport_class_to_shost(dev); 1762 struct fc_internal *i = to_fc_internal(shost->transportt); 1763 1764 /* ignore any data value written to the attribute */ 1765 if (i->f->reset_fc_host_stats) { 1766 i->f->reset_fc_host_stats(shost); 1767 return count; 1768 } 1769 1770 return -ENOENT; 1771 } 1772 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1773 fc_reset_statistics); 1774 1775 static struct attribute *fc_statistics_attrs[] = { 1776 &device_attr_host_seconds_since_last_reset.attr, 1777 &device_attr_host_tx_frames.attr, 1778 &device_attr_host_tx_words.attr, 1779 &device_attr_host_rx_frames.attr, 1780 &device_attr_host_rx_words.attr, 1781 &device_attr_host_lip_count.attr, 1782 &device_attr_host_nos_count.attr, 1783 &device_attr_host_error_frames.attr, 1784 &device_attr_host_dumped_frames.attr, 1785 &device_attr_host_link_failure_count.attr, 1786 &device_attr_host_loss_of_sync_count.attr, 1787 &device_attr_host_loss_of_signal_count.attr, 1788 &device_attr_host_prim_seq_protocol_err_count.attr, 1789 &device_attr_host_invalid_tx_word_count.attr, 1790 &device_attr_host_invalid_crc_count.attr, 1791 &device_attr_host_fcp_input_requests.attr, 1792 &device_attr_host_fcp_output_requests.attr, 1793 &device_attr_host_fcp_control_requests.attr, 1794 &device_attr_host_fcp_input_megabytes.attr, 1795 &device_attr_host_fcp_output_megabytes.attr, 1796 &device_attr_host_fcp_packet_alloc_failures.attr, 1797 &device_attr_host_fcp_packet_aborts.attr, 1798 &device_attr_host_fcp_frame_alloc_failures.attr, 1799 &device_attr_host_fc_no_free_exch.attr, 1800 &device_attr_host_fc_no_free_exch_xid.attr, 1801 &device_attr_host_fc_xid_not_found.attr, 1802 &device_attr_host_fc_xid_busy.attr, 1803 &device_attr_host_fc_seq_not_found.attr, 1804 &device_attr_host_fc_non_bls_resp.attr, 1805 &device_attr_host_reset_statistics.attr, 1806 NULL 1807 }; 1808 1809 static struct attribute_group fc_statistics_group = { 1810 .name = "statistics", 1811 .attrs = fc_statistics_attrs, 1812 }; 1813 1814 1815 /* Host Vport Attributes */ 1816 1817 static int 1818 fc_parse_wwn(const char *ns, u64 *nm) 1819 { 1820 unsigned int i, j; 1821 u8 wwn[8]; 1822 1823 memset(wwn, 0, sizeof(wwn)); 1824 1825 /* Validate and store the new name */ 1826 for (i=0, j=0; i < 16; i++) { 1827 int value; 1828 1829 value = hex_to_bin(*ns++); 1830 if (value >= 0) 1831 j = (j << 4) | value; 1832 else 1833 return -EINVAL; 1834 if (i % 2) { 1835 wwn[i/2] = j & 0xff; 1836 j = 0; 1837 } 1838 } 1839 1840 *nm = wwn_to_u64(wwn); 1841 1842 return 0; 1843 } 1844 1845 1846 /* 1847 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1848 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1849 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1850 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1851 */ 1852 static ssize_t 1853 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1854 const char *buf, size_t count) 1855 { 1856 struct Scsi_Host *shost = transport_class_to_shost(dev); 1857 struct fc_vport_identifiers vid; 1858 struct fc_vport *vport; 1859 unsigned int cnt=count; 1860 int stat; 1861 1862 memset(&vid, 0, sizeof(vid)); 1863 1864 /* count may include a LF at end of string */ 1865 if (buf[cnt-1] == '\n') 1866 cnt--; 1867 1868 /* validate we have enough characters for WWPN */ 1869 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1870 return -EINVAL; 1871 1872 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1873 if (stat) 1874 return stat; 1875 1876 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1877 if (stat) 1878 return stat; 1879 1880 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1881 vid.vport_type = FC_PORTTYPE_NPIV; 1882 /* vid.symbolic_name is already zero/NULL's */ 1883 vid.disable = false; /* always enabled */ 1884 1885 /* we only allow support on Channel 0 !!! */ 1886 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1887 return stat ? stat : count; 1888 } 1889 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1890 store_fc_host_vport_create); 1891 1892 1893 /* 1894 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1895 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1896 * The WWNs are specified as hex characters, and may *not* contain 1897 * any prefixes (e.g. 0x, x, etc) 1898 */ 1899 static ssize_t 1900 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1901 const char *buf, size_t count) 1902 { 1903 struct Scsi_Host *shost = transport_class_to_shost(dev); 1904 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1905 struct fc_vport *vport; 1906 u64 wwpn, wwnn; 1907 unsigned long flags; 1908 unsigned int cnt=count; 1909 int stat, match; 1910 1911 /* count may include a LF at end of string */ 1912 if (buf[cnt-1] == '\n') 1913 cnt--; 1914 1915 /* validate we have enough characters for WWPN */ 1916 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1917 return -EINVAL; 1918 1919 stat = fc_parse_wwn(&buf[0], &wwpn); 1920 if (stat) 1921 return stat; 1922 1923 stat = fc_parse_wwn(&buf[17], &wwnn); 1924 if (stat) 1925 return stat; 1926 1927 spin_lock_irqsave(shost->host_lock, flags); 1928 match = 0; 1929 /* we only allow support on Channel 0 !!! */ 1930 list_for_each_entry(vport, &fc_host->vports, peers) { 1931 if ((vport->channel == 0) && 1932 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1933 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1934 break; 1935 vport->flags |= FC_VPORT_DELETING; 1936 match = 1; 1937 break; 1938 } 1939 } 1940 spin_unlock_irqrestore(shost->host_lock, flags); 1941 1942 if (!match) 1943 return -ENODEV; 1944 1945 stat = fc_vport_terminate(vport); 1946 return stat ? stat : count; 1947 } 1948 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1949 store_fc_host_vport_delete); 1950 1951 1952 static int fc_host_match(struct attribute_container *cont, 1953 struct device *dev) 1954 { 1955 struct Scsi_Host *shost; 1956 struct fc_internal *i; 1957 1958 if (!scsi_is_host_device(dev)) 1959 return 0; 1960 1961 shost = dev_to_shost(dev); 1962 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1963 != &fc_host_class.class) 1964 return 0; 1965 1966 i = to_fc_internal(shost->transportt); 1967 1968 return &i->t.host_attrs.ac == cont; 1969 } 1970 1971 static int fc_target_match(struct attribute_container *cont, 1972 struct device *dev) 1973 { 1974 struct Scsi_Host *shost; 1975 struct fc_internal *i; 1976 1977 if (!scsi_is_target_device(dev)) 1978 return 0; 1979 1980 shost = dev_to_shost(dev->parent); 1981 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1982 != &fc_host_class.class) 1983 return 0; 1984 1985 i = to_fc_internal(shost->transportt); 1986 1987 return &i->t.target_attrs.ac == cont; 1988 } 1989 1990 static void fc_rport_dev_release(struct device *dev) 1991 { 1992 struct fc_rport *rport = dev_to_rport(dev); 1993 put_device(dev->parent); 1994 kfree(rport); 1995 } 1996 1997 int scsi_is_fc_rport(const struct device *dev) 1998 { 1999 return dev->release == fc_rport_dev_release; 2000 } 2001 EXPORT_SYMBOL(scsi_is_fc_rport); 2002 2003 static int fc_rport_match(struct attribute_container *cont, 2004 struct device *dev) 2005 { 2006 struct Scsi_Host *shost; 2007 struct fc_internal *i; 2008 2009 if (!scsi_is_fc_rport(dev)) 2010 return 0; 2011 2012 shost = dev_to_shost(dev->parent); 2013 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2014 != &fc_host_class.class) 2015 return 0; 2016 2017 i = to_fc_internal(shost->transportt); 2018 2019 return &i->rport_attr_cont.ac == cont; 2020 } 2021 2022 2023 static void fc_vport_dev_release(struct device *dev) 2024 { 2025 struct fc_vport *vport = dev_to_vport(dev); 2026 put_device(dev->parent); /* release kobj parent */ 2027 kfree(vport); 2028 } 2029 2030 int scsi_is_fc_vport(const struct device *dev) 2031 { 2032 return dev->release == fc_vport_dev_release; 2033 } 2034 EXPORT_SYMBOL(scsi_is_fc_vport); 2035 2036 static int fc_vport_match(struct attribute_container *cont, 2037 struct device *dev) 2038 { 2039 struct fc_vport *vport; 2040 struct Scsi_Host *shost; 2041 struct fc_internal *i; 2042 2043 if (!scsi_is_fc_vport(dev)) 2044 return 0; 2045 vport = dev_to_vport(dev); 2046 2047 shost = vport_to_shost(vport); 2048 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2049 != &fc_host_class.class) 2050 return 0; 2051 2052 i = to_fc_internal(shost->transportt); 2053 return &i->vport_attr_cont.ac == cont; 2054 } 2055 2056 2057 /** 2058 * fc_timed_out - FC Transport I/O timeout intercept handler 2059 * @scmd: The SCSI command which timed out 2060 * 2061 * This routine protects against error handlers getting invoked while a 2062 * rport is in a blocked state, typically due to a temporarily loss of 2063 * connectivity. If the error handlers are allowed to proceed, requests 2064 * to abort i/o, reset the target, etc will likely fail as there is no way 2065 * to communicate with the device to perform the requested function. These 2066 * failures may result in the midlayer taking the device offline, requiring 2067 * manual intervention to restore operation. 2068 * 2069 * This routine, called whenever an i/o times out, validates the state of 2070 * the underlying rport. If the rport is blocked, it returns 2071 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2072 * Eventually, either the device will return, or devloss_tmo will fire, 2073 * and when the timeout then fires, it will be handled normally. 2074 * If the rport is not blocked, normal error handling continues. 2075 * 2076 * Notes: 2077 * This routine assumes no locks are held on entry. 2078 */ 2079 static enum blk_eh_timer_return 2080 fc_timed_out(struct scsi_cmnd *scmd) 2081 { 2082 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2083 2084 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2085 return BLK_EH_RESET_TIMER; 2086 2087 return BLK_EH_NOT_HANDLED; 2088 } 2089 2090 /* 2091 * Called by fc_user_scan to locate an rport on the shost that 2092 * matches the channel and target id, and invoke scsi_scan_target() 2093 * on the rport. 2094 */ 2095 static void 2096 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2097 { 2098 struct fc_rport *rport; 2099 unsigned long flags; 2100 2101 spin_lock_irqsave(shost->host_lock, flags); 2102 2103 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2104 if (rport->scsi_target_id == -1) 2105 continue; 2106 2107 if (rport->port_state != FC_PORTSTATE_ONLINE) 2108 continue; 2109 2110 if ((channel == rport->channel) && 2111 (id == rport->scsi_target_id)) { 2112 spin_unlock_irqrestore(shost->host_lock, flags); 2113 scsi_scan_target(&rport->dev, channel, id, lun, 1); 2114 return; 2115 } 2116 } 2117 2118 spin_unlock_irqrestore(shost->host_lock, flags); 2119 } 2120 2121 /* 2122 * Called via sysfs scan routines. Necessary, as the FC transport 2123 * wants to place all target objects below the rport object. So this 2124 * routine must invoke the scsi_scan_target() routine with the rport 2125 * object as the parent. 2126 */ 2127 static int 2128 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2129 { 2130 uint chlo, chhi; 2131 uint tgtlo, tgthi; 2132 2133 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2134 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2135 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2136 return -EINVAL; 2137 2138 if (channel == SCAN_WILD_CARD) { 2139 chlo = 0; 2140 chhi = shost->max_channel + 1; 2141 } else { 2142 chlo = channel; 2143 chhi = channel + 1; 2144 } 2145 2146 if (id == SCAN_WILD_CARD) { 2147 tgtlo = 0; 2148 tgthi = shost->max_id; 2149 } else { 2150 tgtlo = id; 2151 tgthi = id + 1; 2152 } 2153 2154 for ( ; chlo < chhi; chlo++) 2155 for ( ; tgtlo < tgthi; tgtlo++) 2156 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2157 2158 return 0; 2159 } 2160 2161 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, 2162 int result) 2163 { 2164 struct fc_internal *i = to_fc_internal(shost->transportt); 2165 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); 2166 } 2167 2168 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) 2169 { 2170 struct fc_internal *i = to_fc_internal(shost->transportt); 2171 return i->f->it_nexus_response(shost, nexus, result); 2172 } 2173 2174 struct scsi_transport_template * 2175 fc_attach_transport(struct fc_function_template *ft) 2176 { 2177 int count; 2178 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2179 GFP_KERNEL); 2180 2181 if (unlikely(!i)) 2182 return NULL; 2183 2184 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2185 i->t.target_attrs.ac.class = &fc_transport_class.class; 2186 i->t.target_attrs.ac.match = fc_target_match; 2187 i->t.target_size = sizeof(struct fc_starget_attrs); 2188 transport_container_register(&i->t.target_attrs); 2189 2190 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2191 i->t.host_attrs.ac.class = &fc_host_class.class; 2192 i->t.host_attrs.ac.match = fc_host_match; 2193 i->t.host_size = sizeof(struct fc_host_attrs); 2194 if (ft->get_fc_host_stats) 2195 i->t.host_attrs.statistics = &fc_statistics_group; 2196 transport_container_register(&i->t.host_attrs); 2197 2198 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2199 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2200 i->rport_attr_cont.ac.match = fc_rport_match; 2201 transport_container_register(&i->rport_attr_cont); 2202 2203 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2204 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2205 i->vport_attr_cont.ac.match = fc_vport_match; 2206 transport_container_register(&i->vport_attr_cont); 2207 2208 i->f = ft; 2209 2210 /* Transport uses the shost workq for scsi scanning */ 2211 i->t.create_work_queue = 1; 2212 2213 i->t.eh_timed_out = fc_timed_out; 2214 2215 i->t.user_scan = fc_user_scan; 2216 2217 /* target-mode drivers' functions */ 2218 i->t.tsk_mgmt_response = fc_tsk_mgmt_response; 2219 i->t.it_nexus_response = fc_it_nexus_response; 2220 2221 /* 2222 * Setup SCSI Target Attributes. 2223 */ 2224 count = 0; 2225 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2226 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2227 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2228 2229 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2230 2231 i->starget_attrs[count] = NULL; 2232 2233 2234 /* 2235 * Setup SCSI Host Attributes. 2236 */ 2237 count=0; 2238 SETUP_HOST_ATTRIBUTE_RD(node_name); 2239 SETUP_HOST_ATTRIBUTE_RD(port_name); 2240 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2241 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2242 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2243 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2244 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2245 if (ft->vport_create) { 2246 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2247 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2248 } 2249 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2250 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2251 SETUP_HOST_ATTRIBUTE_RD(model); 2252 SETUP_HOST_ATTRIBUTE_RD(model_description); 2253 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2254 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2255 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2256 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2257 2258 SETUP_HOST_ATTRIBUTE_RD(port_id); 2259 SETUP_HOST_ATTRIBUTE_RD(port_type); 2260 SETUP_HOST_ATTRIBUTE_RD(port_state); 2261 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2262 SETUP_HOST_ATTRIBUTE_RD(speed); 2263 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2264 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2265 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2266 2267 /* Transport-managed attributes */ 2268 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2269 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2270 if (ft->issue_fc_host_lip) 2271 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2272 if (ft->vport_create) 2273 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2274 if (ft->vport_delete) 2275 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2276 2277 BUG_ON(count > FC_HOST_NUM_ATTRS); 2278 2279 i->host_attrs[count] = NULL; 2280 2281 /* 2282 * Setup Remote Port Attributes. 2283 */ 2284 count=0; 2285 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2286 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2287 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2288 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2289 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2290 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2291 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2292 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2293 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2294 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2295 2296 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2297 2298 i->rport_attrs[count] = NULL; 2299 2300 /* 2301 * Setup Virtual Port Attributes. 2302 */ 2303 count=0; 2304 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2305 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2306 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2307 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2308 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2309 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2310 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2311 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2312 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2313 2314 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2315 2316 i->vport_attrs[count] = NULL; 2317 2318 return &i->t; 2319 } 2320 EXPORT_SYMBOL(fc_attach_transport); 2321 2322 void fc_release_transport(struct scsi_transport_template *t) 2323 { 2324 struct fc_internal *i = to_fc_internal(t); 2325 2326 transport_container_unregister(&i->t.target_attrs); 2327 transport_container_unregister(&i->t.host_attrs); 2328 transport_container_unregister(&i->rport_attr_cont); 2329 transport_container_unregister(&i->vport_attr_cont); 2330 2331 kfree(i); 2332 } 2333 EXPORT_SYMBOL(fc_release_transport); 2334 2335 /** 2336 * fc_queue_work - Queue work to the fc_host workqueue. 2337 * @shost: Pointer to Scsi_Host bound to fc_host. 2338 * @work: Work to queue for execution. 2339 * 2340 * Return value: 2341 * 1 - work queued for execution 2342 * 0 - work is already queued 2343 * -EINVAL - work queue doesn't exist 2344 */ 2345 static int 2346 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2347 { 2348 if (unlikely(!fc_host_work_q(shost))) { 2349 printk(KERN_ERR 2350 "ERROR: FC host '%s' attempted to queue work, " 2351 "when no workqueue created.\n", shost->hostt->name); 2352 dump_stack(); 2353 2354 return -EINVAL; 2355 } 2356 2357 return queue_work(fc_host_work_q(shost), work); 2358 } 2359 2360 /** 2361 * fc_flush_work - Flush a fc_host's workqueue. 2362 * @shost: Pointer to Scsi_Host bound to fc_host. 2363 */ 2364 static void 2365 fc_flush_work(struct Scsi_Host *shost) 2366 { 2367 if (!fc_host_work_q(shost)) { 2368 printk(KERN_ERR 2369 "ERROR: FC host '%s' attempted to flush work, " 2370 "when no workqueue created.\n", shost->hostt->name); 2371 dump_stack(); 2372 return; 2373 } 2374 2375 flush_workqueue(fc_host_work_q(shost)); 2376 } 2377 2378 /** 2379 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2380 * @shost: Pointer to Scsi_Host bound to fc_host. 2381 * @work: Work to queue for execution. 2382 * @delay: jiffies to delay the work queuing 2383 * 2384 * Return value: 2385 * 1 on success / 0 already queued / < 0 for error 2386 */ 2387 static int 2388 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2389 unsigned long delay) 2390 { 2391 if (unlikely(!fc_host_devloss_work_q(shost))) { 2392 printk(KERN_ERR 2393 "ERROR: FC host '%s' attempted to queue work, " 2394 "when no workqueue created.\n", shost->hostt->name); 2395 dump_stack(); 2396 2397 return -EINVAL; 2398 } 2399 2400 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2401 } 2402 2403 /** 2404 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2405 * @shost: Pointer to Scsi_Host bound to fc_host. 2406 */ 2407 static void 2408 fc_flush_devloss(struct Scsi_Host *shost) 2409 { 2410 if (!fc_host_devloss_work_q(shost)) { 2411 printk(KERN_ERR 2412 "ERROR: FC host '%s' attempted to flush work, " 2413 "when no workqueue created.\n", shost->hostt->name); 2414 dump_stack(); 2415 return; 2416 } 2417 2418 flush_workqueue(fc_host_devloss_work_q(shost)); 2419 } 2420 2421 2422 /** 2423 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2424 * @shost: Which &Scsi_Host 2425 * 2426 * This routine is expected to be called immediately preceding the 2427 * a driver's call to scsi_remove_host(). 2428 * 2429 * WARNING: A driver utilizing the fc_transport, which fails to call 2430 * this routine prior to scsi_remove_host(), will leave dangling 2431 * objects in /sys/class/fc_remote_ports. Access to any of these 2432 * objects can result in a system crash !!! 2433 * 2434 * Notes: 2435 * This routine assumes no locks are held on entry. 2436 */ 2437 void 2438 fc_remove_host(struct Scsi_Host *shost) 2439 { 2440 struct fc_vport *vport = NULL, *next_vport = NULL; 2441 struct fc_rport *rport = NULL, *next_rport = NULL; 2442 struct workqueue_struct *work_q; 2443 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2444 unsigned long flags; 2445 2446 spin_lock_irqsave(shost->host_lock, flags); 2447 2448 /* Remove any vports */ 2449 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) 2450 fc_queue_work(shost, &vport->vport_delete_work); 2451 2452 /* Remove any remote ports */ 2453 list_for_each_entry_safe(rport, next_rport, 2454 &fc_host->rports, peers) { 2455 list_del(&rport->peers); 2456 rport->port_state = FC_PORTSTATE_DELETED; 2457 fc_queue_work(shost, &rport->rport_delete_work); 2458 } 2459 2460 list_for_each_entry_safe(rport, next_rport, 2461 &fc_host->rport_bindings, peers) { 2462 list_del(&rport->peers); 2463 rport->port_state = FC_PORTSTATE_DELETED; 2464 fc_queue_work(shost, &rport->rport_delete_work); 2465 } 2466 2467 spin_unlock_irqrestore(shost->host_lock, flags); 2468 2469 /* flush all scan work items */ 2470 scsi_flush_work(shost); 2471 2472 /* flush all stgt delete, and rport delete work items, then kill it */ 2473 if (fc_host->work_q) { 2474 work_q = fc_host->work_q; 2475 fc_host->work_q = NULL; 2476 destroy_workqueue(work_q); 2477 } 2478 2479 /* flush all devloss work items, then kill it */ 2480 if (fc_host->devloss_work_q) { 2481 work_q = fc_host->devloss_work_q; 2482 fc_host->devloss_work_q = NULL; 2483 destroy_workqueue(work_q); 2484 } 2485 } 2486 EXPORT_SYMBOL(fc_remove_host); 2487 2488 static void fc_terminate_rport_io(struct fc_rport *rport) 2489 { 2490 struct Scsi_Host *shost = rport_to_shost(rport); 2491 struct fc_internal *i = to_fc_internal(shost->transportt); 2492 2493 /* Involve the LLDD if possible to terminate all io on the rport. */ 2494 if (i->f->terminate_rport_io) 2495 i->f->terminate_rport_io(rport); 2496 2497 /* 2498 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2499 */ 2500 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2501 } 2502 2503 /** 2504 * fc_starget_delete - called to delete the scsi descendants of an rport 2505 * @work: remote port to be operated on. 2506 * 2507 * Deletes target and all sdevs. 2508 */ 2509 static void 2510 fc_starget_delete(struct work_struct *work) 2511 { 2512 struct fc_rport *rport = 2513 container_of(work, struct fc_rport, stgt_delete_work); 2514 2515 fc_terminate_rport_io(rport); 2516 scsi_remove_target(&rport->dev); 2517 } 2518 2519 2520 /** 2521 * fc_rport_final_delete - finish rport termination and delete it. 2522 * @work: remote port to be deleted. 2523 */ 2524 static void 2525 fc_rport_final_delete(struct work_struct *work) 2526 { 2527 struct fc_rport *rport = 2528 container_of(work, struct fc_rport, rport_delete_work); 2529 struct device *dev = &rport->dev; 2530 struct Scsi_Host *shost = rport_to_shost(rport); 2531 struct fc_internal *i = to_fc_internal(shost->transportt); 2532 unsigned long flags; 2533 int do_callback = 0; 2534 2535 fc_terminate_rport_io(rport); 2536 2537 /* 2538 * if a scan is pending, flush the SCSI Host work_q so that 2539 * that we can reclaim the rport scan work element. 2540 */ 2541 if (rport->flags & FC_RPORT_SCAN_PENDING) 2542 scsi_flush_work(shost); 2543 2544 /* 2545 * Cancel any outstanding timers. These should really exist 2546 * only when rmmod'ing the LLDD and we're asking for 2547 * immediate termination of the rports 2548 */ 2549 spin_lock_irqsave(shost->host_lock, flags); 2550 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2551 spin_unlock_irqrestore(shost->host_lock, flags); 2552 if (!cancel_delayed_work(&rport->fail_io_work)) 2553 fc_flush_devloss(shost); 2554 if (!cancel_delayed_work(&rport->dev_loss_work)) 2555 fc_flush_devloss(shost); 2556 spin_lock_irqsave(shost->host_lock, flags); 2557 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2558 } 2559 spin_unlock_irqrestore(shost->host_lock, flags); 2560 2561 /* Delete SCSI target and sdevs */ 2562 if (rport->scsi_target_id != -1) 2563 fc_starget_delete(&rport->stgt_delete_work); 2564 2565 /* 2566 * Notify the driver that the rport is now dead. The LLDD will 2567 * also guarantee that any communication to the rport is terminated 2568 * 2569 * Avoid this call if we already called it when we preserved the 2570 * rport for the binding. 2571 */ 2572 spin_lock_irqsave(shost->host_lock, flags); 2573 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2574 (i->f->dev_loss_tmo_callbk)) { 2575 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2576 do_callback = 1; 2577 } 2578 spin_unlock_irqrestore(shost->host_lock, flags); 2579 2580 if (do_callback) 2581 i->f->dev_loss_tmo_callbk(rport); 2582 2583 fc_bsg_remove(rport->rqst_q); 2584 2585 transport_remove_device(dev); 2586 device_del(dev); 2587 transport_destroy_device(dev); 2588 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2589 put_device(dev); /* for self-reference */ 2590 } 2591 2592 2593 /** 2594 * fc_rport_create - allocates and creates a remote FC port. 2595 * @shost: scsi host the remote port is connected to. 2596 * @channel: Channel on shost port connected to. 2597 * @ids: The world wide names, fc address, and FC4 port 2598 * roles for the remote port. 2599 * 2600 * Allocates and creates the remoter port structure, including the 2601 * class and sysfs creation. 2602 * 2603 * Notes: 2604 * This routine assumes no locks are held on entry. 2605 */ 2606 static struct fc_rport * 2607 fc_rport_create(struct Scsi_Host *shost, int channel, 2608 struct fc_rport_identifiers *ids) 2609 { 2610 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2611 struct fc_internal *fci = to_fc_internal(shost->transportt); 2612 struct fc_rport *rport; 2613 struct device *dev; 2614 unsigned long flags; 2615 int error; 2616 size_t size; 2617 2618 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2619 rport = kzalloc(size, GFP_KERNEL); 2620 if (unlikely(!rport)) { 2621 printk(KERN_ERR "%s: allocation failure\n", __func__); 2622 return NULL; 2623 } 2624 2625 rport->maxframe_size = -1; 2626 rport->supported_classes = FC_COS_UNSPECIFIED; 2627 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2628 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2629 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2630 rport->port_id = ids->port_id; 2631 rport->roles = ids->roles; 2632 rport->port_state = FC_PORTSTATE_ONLINE; 2633 if (fci->f->dd_fcrport_size) 2634 rport->dd_data = &rport[1]; 2635 rport->channel = channel; 2636 rport->fast_io_fail_tmo = -1; 2637 2638 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2639 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2640 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2641 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2642 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2643 2644 spin_lock_irqsave(shost->host_lock, flags); 2645 2646 rport->number = fc_host->next_rport_number++; 2647 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) 2648 rport->scsi_target_id = fc_host->next_target_id++; 2649 else 2650 rport->scsi_target_id = -1; 2651 list_add_tail(&rport->peers, &fc_host->rports); 2652 get_device(&shost->shost_gendev); /* for fc_host->rport list */ 2653 2654 spin_unlock_irqrestore(shost->host_lock, flags); 2655 2656 dev = &rport->dev; 2657 device_initialize(dev); /* takes self reference */ 2658 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2659 dev->release = fc_rport_dev_release; 2660 dev_set_name(dev, "rport-%d:%d-%d", 2661 shost->host_no, channel, rport->number); 2662 transport_setup_device(dev); 2663 2664 error = device_add(dev); 2665 if (error) { 2666 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2667 goto delete_rport; 2668 } 2669 transport_add_device(dev); 2670 transport_configure_device(dev); 2671 2672 fc_bsg_rportadd(shost, rport); 2673 /* ignore any bsg add error - we just can't do sgio */ 2674 2675 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2676 /* initiate a scan of the target */ 2677 rport->flags |= FC_RPORT_SCAN_PENDING; 2678 scsi_queue_work(shost, &rport->scan_work); 2679 } 2680 2681 return rport; 2682 2683 delete_rport: 2684 transport_destroy_device(dev); 2685 spin_lock_irqsave(shost->host_lock, flags); 2686 list_del(&rport->peers); 2687 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2688 spin_unlock_irqrestore(shost->host_lock, flags); 2689 put_device(dev->parent); 2690 kfree(rport); 2691 return NULL; 2692 } 2693 2694 /** 2695 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2696 * @shost: scsi host the remote port is connected to. 2697 * @channel: Channel on shost port connected to. 2698 * @ids: The world wide names, fc address, and FC4 port 2699 * roles for the remote port. 2700 * 2701 * The LLDD calls this routine to notify the transport of the existence 2702 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2703 * of the port, it's FC address (port_id), and the FC4 roles that are 2704 * active for the port. 2705 * 2706 * For ports that are FCP targets (aka scsi targets), the FC transport 2707 * maintains consistent target id bindings on behalf of the LLDD. 2708 * A consistent target id binding is an assignment of a target id to 2709 * a remote port identifier, which persists while the scsi host is 2710 * attached. The remote port can disappear, then later reappear, and 2711 * it's target id assignment remains the same. This allows for shifts 2712 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2713 * changes to the scsi subsystem which is based on scsi host number and 2714 * target id values. Bindings are only valid during the attachment of 2715 * the scsi host. If the host detaches, then later re-attaches, target 2716 * id bindings may change. 2717 * 2718 * This routine is responsible for returning a remote port structure. 2719 * The routine will search the list of remote ports it maintains 2720 * internally on behalf of consistent target id mappings. If found, the 2721 * remote port structure will be reused. Otherwise, a new remote port 2722 * structure will be allocated. 2723 * 2724 * Whenever a remote port is allocated, a new fc_remote_port class 2725 * device is created. 2726 * 2727 * Should not be called from interrupt context. 2728 * 2729 * Notes: 2730 * This routine assumes no locks are held on entry. 2731 */ 2732 struct fc_rport * 2733 fc_remote_port_add(struct Scsi_Host *shost, int channel, 2734 struct fc_rport_identifiers *ids) 2735 { 2736 struct fc_internal *fci = to_fc_internal(shost->transportt); 2737 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2738 struct fc_rport *rport; 2739 unsigned long flags; 2740 int match = 0; 2741 2742 /* ensure any stgt delete functions are done */ 2743 fc_flush_work(shost); 2744 2745 /* 2746 * Search the list of "active" rports, for an rport that has been 2747 * deleted, but we've held off the real delete while the target 2748 * is in a "blocked" state. 2749 */ 2750 spin_lock_irqsave(shost->host_lock, flags); 2751 2752 list_for_each_entry(rport, &fc_host->rports, peers) { 2753 2754 if ((rport->port_state == FC_PORTSTATE_BLOCKED) && 2755 (rport->channel == channel)) { 2756 2757 switch (fc_host->tgtid_bind_type) { 2758 case FC_TGTID_BIND_BY_WWPN: 2759 case FC_TGTID_BIND_NONE: 2760 if (rport->port_name == ids->port_name) 2761 match = 1; 2762 break; 2763 case FC_TGTID_BIND_BY_WWNN: 2764 if (rport->node_name == ids->node_name) 2765 match = 1; 2766 break; 2767 case FC_TGTID_BIND_BY_ID: 2768 if (rport->port_id == ids->port_id) 2769 match = 1; 2770 break; 2771 } 2772 2773 if (match) { 2774 2775 memcpy(&rport->node_name, &ids->node_name, 2776 sizeof(rport->node_name)); 2777 memcpy(&rport->port_name, &ids->port_name, 2778 sizeof(rport->port_name)); 2779 rport->port_id = ids->port_id; 2780 2781 rport->port_state = FC_PORTSTATE_ONLINE; 2782 rport->roles = ids->roles; 2783 2784 spin_unlock_irqrestore(shost->host_lock, flags); 2785 2786 if (fci->f->dd_fcrport_size) 2787 memset(rport->dd_data, 0, 2788 fci->f->dd_fcrport_size); 2789 2790 /* 2791 * If we were not a target, cancel the 2792 * io terminate and rport timers, and 2793 * we're done. 2794 * 2795 * If we were a target, but our new role 2796 * doesn't indicate a target, leave the 2797 * timers running expecting the role to 2798 * change as the target fully logs in. If 2799 * it doesn't, the target will be torn down. 2800 * 2801 * If we were a target, and our role shows 2802 * we're still a target, cancel the timers 2803 * and kick off a scan. 2804 */ 2805 2806 /* was a target, not in roles */ 2807 if ((rport->scsi_target_id != -1) && 2808 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2809 return rport; 2810 2811 /* 2812 * Stop the fail io and dev_loss timers. 2813 * If they flush, the port_state will 2814 * be checked and will NOOP the function. 2815 */ 2816 if (!cancel_delayed_work(&rport->fail_io_work)) 2817 fc_flush_devloss(shost); 2818 if (!cancel_delayed_work(&rport->dev_loss_work)) 2819 fc_flush_devloss(shost); 2820 2821 spin_lock_irqsave(shost->host_lock, flags); 2822 2823 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2824 FC_RPORT_DEVLOSS_PENDING | 2825 FC_RPORT_DEVLOSS_CALLBK_DONE); 2826 2827 spin_unlock_irqrestore(shost->host_lock, flags); 2828 2829 /* if target, initiate a scan */ 2830 if (rport->scsi_target_id != -1) { 2831 scsi_target_unblock(&rport->dev, 2832 SDEV_RUNNING); 2833 spin_lock_irqsave(shost->host_lock, 2834 flags); 2835 rport->flags |= FC_RPORT_SCAN_PENDING; 2836 scsi_queue_work(shost, 2837 &rport->scan_work); 2838 spin_unlock_irqrestore(shost->host_lock, 2839 flags); 2840 } 2841 2842 fc_bsg_goose_queue(rport); 2843 2844 return rport; 2845 } 2846 } 2847 } 2848 2849 /* 2850 * Search the bindings array 2851 * Note: if never a FCP target, you won't be on this list 2852 */ 2853 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2854 2855 /* search for a matching consistent binding */ 2856 2857 list_for_each_entry(rport, &fc_host->rport_bindings, 2858 peers) { 2859 if (rport->channel != channel) 2860 continue; 2861 2862 switch (fc_host->tgtid_bind_type) { 2863 case FC_TGTID_BIND_BY_WWPN: 2864 if (rport->port_name == ids->port_name) 2865 match = 1; 2866 break; 2867 case FC_TGTID_BIND_BY_WWNN: 2868 if (rport->node_name == ids->node_name) 2869 match = 1; 2870 break; 2871 case FC_TGTID_BIND_BY_ID: 2872 if (rport->port_id == ids->port_id) 2873 match = 1; 2874 break; 2875 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2876 break; 2877 } 2878 2879 if (match) { 2880 list_move_tail(&rport->peers, &fc_host->rports); 2881 break; 2882 } 2883 } 2884 2885 if (match) { 2886 memcpy(&rport->node_name, &ids->node_name, 2887 sizeof(rport->node_name)); 2888 memcpy(&rport->port_name, &ids->port_name, 2889 sizeof(rport->port_name)); 2890 rport->port_id = ids->port_id; 2891 rport->roles = ids->roles; 2892 rport->port_state = FC_PORTSTATE_ONLINE; 2893 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2894 2895 if (fci->f->dd_fcrport_size) 2896 memset(rport->dd_data, 0, 2897 fci->f->dd_fcrport_size); 2898 spin_unlock_irqrestore(shost->host_lock, flags); 2899 2900 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) { 2901 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 2902 2903 /* initiate a scan of the target */ 2904 spin_lock_irqsave(shost->host_lock, flags); 2905 rport->flags |= FC_RPORT_SCAN_PENDING; 2906 scsi_queue_work(shost, &rport->scan_work); 2907 spin_unlock_irqrestore(shost->host_lock, flags); 2908 } 2909 return rport; 2910 } 2911 } 2912 2913 spin_unlock_irqrestore(shost->host_lock, flags); 2914 2915 /* No consistent binding found - create new remote port entry */ 2916 rport = fc_rport_create(shost, channel, ids); 2917 2918 return rport; 2919 } 2920 EXPORT_SYMBOL(fc_remote_port_add); 2921 2922 2923 /** 2924 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2925 * @rport: The remote port that no longer exists 2926 * 2927 * The LLDD calls this routine to notify the transport that a remote 2928 * port is no longer part of the topology. Note: Although a port 2929 * may no longer be part of the topology, it may persist in the remote 2930 * ports displayed by the fc_host. We do this under 2 conditions: 2931 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2932 * This allows the port to temporarily disappear, then reappear without 2933 * disrupting the SCSI device tree attached to it. During the "blocked" 2934 * period the port will still exist. 2935 * 2) If the port was a scsi target and disappears for longer than we 2936 * expect, we'll delete the port and the tear down the SCSI device tree 2937 * attached to it. However, we want to semi-persist the target id assigned 2938 * to that port if it eventually does exist. The port structure will 2939 * remain (although with minimal information) so that the target id 2940 * bindings remails. 2941 * 2942 * If the remote port is not an FCP Target, it will be fully torn down 2943 * and deallocated, including the fc_remote_port class device. 2944 * 2945 * If the remote port is an FCP Target, the port will be placed in a 2946 * temporary blocked state. From the LLDD's perspective, the rport no 2947 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2948 * exists, but all sdevs on it are blocked from further I/O. The following 2949 * is then expected. 2950 * 2951 * If the remote port does not return (signaled by a LLDD call to 2952 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2953 * scsi target is removed - killing all outstanding i/o and removing the 2954 * scsi devices attached ot it. The port structure will be marked Not 2955 * Present and be partially cleared, leaving only enough information to 2956 * recognize the remote port relative to the scsi target id binding if 2957 * it later appears. The port will remain as long as there is a valid 2958 * binding (e.g. until the user changes the binding type or unloads the 2959 * scsi host with the binding). 2960 * 2961 * If the remote port returns within the dev_loss_tmo value (and matches 2962 * according to the target id binding type), the port structure will be 2963 * reused. If it is no longer a SCSI target, the target will be torn 2964 * down. If it continues to be a SCSI target, then the target will be 2965 * unblocked (allowing i/o to be resumed), and a scan will be activated 2966 * to ensure that all luns are detected. 2967 * 2968 * Called from normal process context only - cannot be called from interrupt. 2969 * 2970 * Notes: 2971 * This routine assumes no locks are held on entry. 2972 */ 2973 void 2974 fc_remote_port_delete(struct fc_rport *rport) 2975 { 2976 struct Scsi_Host *shost = rport_to_shost(rport); 2977 unsigned long timeout = rport->dev_loss_tmo; 2978 unsigned long flags; 2979 2980 /* 2981 * No need to flush the fc_host work_q's, as all adds are synchronous. 2982 * 2983 * We do need to reclaim the rport scan work element, so eventually 2984 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2985 * there's still a scan pending. 2986 */ 2987 2988 spin_lock_irqsave(shost->host_lock, flags); 2989 2990 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2991 spin_unlock_irqrestore(shost->host_lock, flags); 2992 return; 2993 } 2994 2995 /* 2996 * In the past, we if this was not an FCP-Target, we would 2997 * unconditionally just jump to deleting the rport. 2998 * However, rports can be used as node containers by the LLDD, 2999 * and its not appropriate to just terminate the rport at the 3000 * first sign of a loss in connectivity. The LLDD may want to 3001 * send ELS traffic to re-validate the login. If the rport is 3002 * immediately deleted, it makes it inappropriate for a node 3003 * container. 3004 * So... we now unconditionally wait dev_loss_tmo before 3005 * destroying an rport. 3006 */ 3007 3008 rport->port_state = FC_PORTSTATE_BLOCKED; 3009 3010 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3011 3012 spin_unlock_irqrestore(shost->host_lock, flags); 3013 3014 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && 3015 shost->active_mode & MODE_TARGET) 3016 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); 3017 3018 scsi_target_block(&rport->dev); 3019 3020 /* see if we need to kill io faster than waiting for device loss */ 3021 if ((rport->fast_io_fail_tmo != -1) && 3022 (rport->fast_io_fail_tmo < timeout)) 3023 fc_queue_devloss_work(shost, &rport->fail_io_work, 3024 rport->fast_io_fail_tmo * HZ); 3025 3026 /* cap the length the devices can be blocked until they are deleted */ 3027 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3028 } 3029 EXPORT_SYMBOL(fc_remote_port_delete); 3030 3031 /** 3032 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3033 * @rport: The remote port that changed. 3034 * @roles: New roles for this port. 3035 * 3036 * Description: The LLDD calls this routine to notify the transport that the 3037 * roles on a remote port may have changed. The largest effect of this is 3038 * if a port now becomes a FCP Target, it must be allocated a 3039 * scsi target id. If the port is no longer a FCP target, any 3040 * scsi target id value assigned to it will persist in case the 3041 * role changes back to include FCP Target. No changes in the scsi 3042 * midlayer will be invoked if the role changes (in the expectation 3043 * that the role will be resumed. If it doesn't normal error processing 3044 * will take place). 3045 * 3046 * Should not be called from interrupt context. 3047 * 3048 * Notes: 3049 * This routine assumes no locks are held on entry. 3050 */ 3051 void 3052 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3053 { 3054 struct Scsi_Host *shost = rport_to_shost(rport); 3055 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3056 unsigned long flags; 3057 int create = 0; 3058 int ret; 3059 3060 spin_lock_irqsave(shost->host_lock, flags); 3061 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3062 if (rport->scsi_target_id == -1) { 3063 rport->scsi_target_id = fc_host->next_target_id++; 3064 create = 1; 3065 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3066 create = 1; 3067 } else if (shost->active_mode & MODE_TARGET) { 3068 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, 3069 (char *)&rport->node_name); 3070 if (ret) 3071 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", 3072 ret); 3073 } 3074 3075 rport->roles = roles; 3076 3077 spin_unlock_irqrestore(shost->host_lock, flags); 3078 3079 if (create) { 3080 /* 3081 * There may have been a delete timer running on the 3082 * port. Ensure that it is cancelled as we now know 3083 * the port is an FCP Target. 3084 * Note: we know the rport is exists and in an online 3085 * state as the LLDD would not have had an rport 3086 * reference to pass us. 3087 * 3088 * Take no action on the del_timer failure as the state 3089 * machine state change will validate the 3090 * transaction. 3091 */ 3092 if (!cancel_delayed_work(&rport->fail_io_work)) 3093 fc_flush_devloss(shost); 3094 if (!cancel_delayed_work(&rport->dev_loss_work)) 3095 fc_flush_devloss(shost); 3096 3097 spin_lock_irqsave(shost->host_lock, flags); 3098 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3099 FC_RPORT_DEVLOSS_PENDING | 3100 FC_RPORT_DEVLOSS_CALLBK_DONE); 3101 spin_unlock_irqrestore(shost->host_lock, flags); 3102 3103 /* ensure any stgt delete functions are done */ 3104 fc_flush_work(shost); 3105 3106 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3107 /* initiate a scan of the target */ 3108 spin_lock_irqsave(shost->host_lock, flags); 3109 rport->flags |= FC_RPORT_SCAN_PENDING; 3110 scsi_queue_work(shost, &rport->scan_work); 3111 spin_unlock_irqrestore(shost->host_lock, flags); 3112 } 3113 } 3114 EXPORT_SYMBOL(fc_remote_port_rolechg); 3115 3116 /** 3117 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3118 * @work: rport target that failed to reappear in the allotted time. 3119 * 3120 * Description: An attempt to delete a remote port blocks, and if it fails 3121 * to return in the allotted time this gets called. 3122 */ 3123 static void 3124 fc_timeout_deleted_rport(struct work_struct *work) 3125 { 3126 struct fc_rport *rport = 3127 container_of(work, struct fc_rport, dev_loss_work.work); 3128 struct Scsi_Host *shost = rport_to_shost(rport); 3129 struct fc_internal *i = to_fc_internal(shost->transportt); 3130 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3131 unsigned long flags; 3132 int do_callback = 0; 3133 3134 spin_lock_irqsave(shost->host_lock, flags); 3135 3136 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3137 3138 /* 3139 * If the port is ONLINE, then it came back. If it was a SCSI 3140 * target, validate it still is. If not, tear down the 3141 * scsi_target on it. 3142 */ 3143 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3144 (rport->scsi_target_id != -1) && 3145 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3146 dev_printk(KERN_ERR, &rport->dev, 3147 "blocked FC remote port time out: no longer" 3148 " a FCP target, removing starget\n"); 3149 spin_unlock_irqrestore(shost->host_lock, flags); 3150 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3151 fc_queue_work(shost, &rport->stgt_delete_work); 3152 return; 3153 } 3154 3155 /* NOOP state - we're flushing workq's */ 3156 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3157 spin_unlock_irqrestore(shost->host_lock, flags); 3158 dev_printk(KERN_ERR, &rport->dev, 3159 "blocked FC remote port time out: leaving" 3160 " rport%s alone\n", 3161 (rport->scsi_target_id != -1) ? " and starget" : ""); 3162 return; 3163 } 3164 3165 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3166 (rport->scsi_target_id == -1)) { 3167 list_del(&rport->peers); 3168 rport->port_state = FC_PORTSTATE_DELETED; 3169 dev_printk(KERN_ERR, &rport->dev, 3170 "blocked FC remote port time out: removing" 3171 " rport%s\n", 3172 (rport->scsi_target_id != -1) ? " and starget" : ""); 3173 fc_queue_work(shost, &rport->rport_delete_work); 3174 spin_unlock_irqrestore(shost->host_lock, flags); 3175 return; 3176 } 3177 3178 dev_printk(KERN_ERR, &rport->dev, 3179 "blocked FC remote port time out: removing target and " 3180 "saving binding\n"); 3181 3182 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3183 3184 /* 3185 * Note: We do not remove or clear the hostdata area. This allows 3186 * host-specific target data to persist along with the 3187 * scsi_target_id. It's up to the host to manage it's hostdata area. 3188 */ 3189 3190 /* 3191 * Reinitialize port attributes that may change if the port comes back. 3192 */ 3193 rport->maxframe_size = -1; 3194 rport->supported_classes = FC_COS_UNSPECIFIED; 3195 rport->roles = FC_PORT_ROLE_UNKNOWN; 3196 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3197 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3198 3199 /* 3200 * Pre-emptively kill I/O rather than waiting for the work queue 3201 * item to teardown the starget. (FCOE libFC folks prefer this 3202 * and to have the rport_port_id still set when it's done). 3203 */ 3204 spin_unlock_irqrestore(shost->host_lock, flags); 3205 fc_terminate_rport_io(rport); 3206 3207 spin_lock_irqsave(shost->host_lock, flags); 3208 3209 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3210 3211 /* remove the identifiers that aren't used in the consisting binding */ 3212 switch (fc_host->tgtid_bind_type) { 3213 case FC_TGTID_BIND_BY_WWPN: 3214 rport->node_name = -1; 3215 rport->port_id = -1; 3216 break; 3217 case FC_TGTID_BIND_BY_WWNN: 3218 rport->port_name = -1; 3219 rport->port_id = -1; 3220 break; 3221 case FC_TGTID_BIND_BY_ID: 3222 rport->node_name = -1; 3223 rport->port_name = -1; 3224 break; 3225 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3226 break; 3227 } 3228 3229 /* 3230 * As this only occurs if the remote port (scsi target) 3231 * went away and didn't come back - we'll remove 3232 * all attached scsi devices. 3233 */ 3234 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3235 fc_queue_work(shost, &rport->stgt_delete_work); 3236 3237 do_callback = 1; 3238 } 3239 3240 spin_unlock_irqrestore(shost->host_lock, flags); 3241 3242 /* 3243 * Notify the driver that the rport is now dead. The LLDD will 3244 * also guarantee that any communication to the rport is terminated 3245 * 3246 * Note: we set the CALLBK_DONE flag above to correspond 3247 */ 3248 if (do_callback && i->f->dev_loss_tmo_callbk) 3249 i->f->dev_loss_tmo_callbk(rport); 3250 } 3251 3252 3253 /** 3254 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3255 * @work: rport to terminate io on. 3256 * 3257 * Notes: Only requests the failure of the io, not that all are flushed 3258 * prior to returning. 3259 */ 3260 static void 3261 fc_timeout_fail_rport_io(struct work_struct *work) 3262 { 3263 struct fc_rport *rport = 3264 container_of(work, struct fc_rport, fail_io_work.work); 3265 3266 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3267 return; 3268 3269 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3270 fc_terminate_rport_io(rport); 3271 } 3272 3273 /** 3274 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3275 * @work: remote port to be scanned. 3276 */ 3277 static void 3278 fc_scsi_scan_rport(struct work_struct *work) 3279 { 3280 struct fc_rport *rport = 3281 container_of(work, struct fc_rport, scan_work); 3282 struct Scsi_Host *shost = rport_to_shost(rport); 3283 struct fc_internal *i = to_fc_internal(shost->transportt); 3284 unsigned long flags; 3285 3286 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3287 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3288 !(i->f->disable_target_scan)) { 3289 scsi_scan_target(&rport->dev, rport->channel, 3290 rport->scsi_target_id, SCAN_WILD_CARD, 1); 3291 } 3292 3293 spin_lock_irqsave(shost->host_lock, flags); 3294 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3295 spin_unlock_irqrestore(shost->host_lock, flags); 3296 } 3297 3298 /** 3299 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3300 * @cmnd: SCSI command that scsi_eh is trying to recover 3301 * 3302 * This routine can be called from a FC LLD scsi_eh callback. It 3303 * blocks the scsi_eh thread until the fc_rport leaves the 3304 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3305 * necessary to avoid the scsi_eh failing recovery actions for blocked 3306 * rports which would lead to offlined SCSI devices. 3307 * 3308 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3309 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3310 * passed back to scsi_eh. 3311 */ 3312 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3313 { 3314 struct Scsi_Host *shost = cmnd->device->host; 3315 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3316 unsigned long flags; 3317 3318 spin_lock_irqsave(shost->host_lock, flags); 3319 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3320 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3321 spin_unlock_irqrestore(shost->host_lock, flags); 3322 msleep(1000); 3323 spin_lock_irqsave(shost->host_lock, flags); 3324 } 3325 spin_unlock_irqrestore(shost->host_lock, flags); 3326 3327 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3328 return FAST_IO_FAIL; 3329 3330 return 0; 3331 } 3332 EXPORT_SYMBOL(fc_block_scsi_eh); 3333 3334 /** 3335 * fc_vport_setup - allocates and creates a FC virtual port. 3336 * @shost: scsi host the virtual port is connected to. 3337 * @channel: Channel on shost port connected to. 3338 * @pdev: parent device for vport 3339 * @ids: The world wide names, FC4 port roles, etc for 3340 * the virtual port. 3341 * @ret_vport: The pointer to the created vport. 3342 * 3343 * Allocates and creates the vport structure, calls the parent host 3344 * to instantiate the vport, the completes w/ class and sysfs creation. 3345 * 3346 * Notes: 3347 * This routine assumes no locks are held on entry. 3348 */ 3349 static int 3350 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3351 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3352 { 3353 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3354 struct fc_internal *fci = to_fc_internal(shost->transportt); 3355 struct fc_vport *vport; 3356 struct device *dev; 3357 unsigned long flags; 3358 size_t size; 3359 int error; 3360 3361 *ret_vport = NULL; 3362 3363 if ( ! fci->f->vport_create) 3364 return -ENOENT; 3365 3366 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3367 vport = kzalloc(size, GFP_KERNEL); 3368 if (unlikely(!vport)) { 3369 printk(KERN_ERR "%s: allocation failure\n", __func__); 3370 return -ENOMEM; 3371 } 3372 3373 vport->vport_state = FC_VPORT_UNKNOWN; 3374 vport->vport_last_state = FC_VPORT_UNKNOWN; 3375 vport->node_name = ids->node_name; 3376 vport->port_name = ids->port_name; 3377 vport->roles = ids->roles; 3378 vport->vport_type = ids->vport_type; 3379 if (fci->f->dd_fcvport_size) 3380 vport->dd_data = &vport[1]; 3381 vport->shost = shost; 3382 vport->channel = channel; 3383 vport->flags = FC_VPORT_CREATING; 3384 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3385 3386 spin_lock_irqsave(shost->host_lock, flags); 3387 3388 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3389 spin_unlock_irqrestore(shost->host_lock, flags); 3390 kfree(vport); 3391 return -ENOSPC; 3392 } 3393 fc_host->npiv_vports_inuse++; 3394 vport->number = fc_host->next_vport_number++; 3395 list_add_tail(&vport->peers, &fc_host->vports); 3396 get_device(&shost->shost_gendev); /* for fc_host->vport list */ 3397 3398 spin_unlock_irqrestore(shost->host_lock, flags); 3399 3400 dev = &vport->dev; 3401 device_initialize(dev); /* takes self reference */ 3402 dev->parent = get_device(pdev); /* takes parent reference */ 3403 dev->release = fc_vport_dev_release; 3404 dev_set_name(dev, "vport-%d:%d-%d", 3405 shost->host_no, channel, vport->number); 3406 transport_setup_device(dev); 3407 3408 error = device_add(dev); 3409 if (error) { 3410 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3411 goto delete_vport; 3412 } 3413 transport_add_device(dev); 3414 transport_configure_device(dev); 3415 3416 error = fci->f->vport_create(vport, ids->disable); 3417 if (error) { 3418 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3419 goto delete_vport_all; 3420 } 3421 3422 /* 3423 * if the parent isn't the physical adapter's Scsi_Host, ensure 3424 * the Scsi_Host at least contains ia symlink to the vport. 3425 */ 3426 if (pdev != &shost->shost_gendev) { 3427 error = sysfs_create_link(&shost->shost_gendev.kobj, 3428 &dev->kobj, dev_name(dev)); 3429 if (error) 3430 printk(KERN_ERR 3431 "%s: Cannot create vport symlinks for " 3432 "%s, err=%d\n", 3433 __func__, dev_name(dev), error); 3434 } 3435 spin_lock_irqsave(shost->host_lock, flags); 3436 vport->flags &= ~FC_VPORT_CREATING; 3437 spin_unlock_irqrestore(shost->host_lock, flags); 3438 3439 dev_printk(KERN_NOTICE, pdev, 3440 "%s created via shost%d channel %d\n", dev_name(dev), 3441 shost->host_no, channel); 3442 3443 *ret_vport = vport; 3444 3445 return 0; 3446 3447 delete_vport_all: 3448 transport_remove_device(dev); 3449 device_del(dev); 3450 delete_vport: 3451 transport_destroy_device(dev); 3452 spin_lock_irqsave(shost->host_lock, flags); 3453 list_del(&vport->peers); 3454 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3455 fc_host->npiv_vports_inuse--; 3456 spin_unlock_irqrestore(shost->host_lock, flags); 3457 put_device(dev->parent); 3458 kfree(vport); 3459 3460 return error; 3461 } 3462 3463 /** 3464 * fc_vport_create - Admin App or LLDD requests creation of a vport 3465 * @shost: scsi host the virtual port is connected to. 3466 * @channel: channel on shost port connected to. 3467 * @ids: The world wide names, FC4 port roles, etc for 3468 * the virtual port. 3469 * 3470 * Notes: 3471 * This routine assumes no locks are held on entry. 3472 */ 3473 struct fc_vport * 3474 fc_vport_create(struct Scsi_Host *shost, int channel, 3475 struct fc_vport_identifiers *ids) 3476 { 3477 int stat; 3478 struct fc_vport *vport; 3479 3480 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3481 ids, &vport); 3482 return stat ? NULL : vport; 3483 } 3484 EXPORT_SYMBOL(fc_vport_create); 3485 3486 /** 3487 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3488 * @vport: fc_vport to be terminated 3489 * 3490 * Calls the LLDD vport_delete() function, then deallocates and removes 3491 * the vport from the shost and object tree. 3492 * 3493 * Notes: 3494 * This routine assumes no locks are held on entry. 3495 */ 3496 int 3497 fc_vport_terminate(struct fc_vport *vport) 3498 { 3499 struct Scsi_Host *shost = vport_to_shost(vport); 3500 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3501 struct fc_internal *i = to_fc_internal(shost->transportt); 3502 struct device *dev = &vport->dev; 3503 unsigned long flags; 3504 int stat; 3505 3506 if (i->f->vport_delete) 3507 stat = i->f->vport_delete(vport); 3508 else 3509 stat = -ENOENT; 3510 3511 spin_lock_irqsave(shost->host_lock, flags); 3512 vport->flags &= ~FC_VPORT_DELETING; 3513 if (!stat) { 3514 vport->flags |= FC_VPORT_DELETED; 3515 list_del(&vport->peers); 3516 fc_host->npiv_vports_inuse--; 3517 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3518 } 3519 spin_unlock_irqrestore(shost->host_lock, flags); 3520 3521 if (stat) 3522 return stat; 3523 3524 if (dev->parent != &shost->shost_gendev) 3525 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3526 transport_remove_device(dev); 3527 device_del(dev); 3528 transport_destroy_device(dev); 3529 3530 /* 3531 * Removing our self-reference should mean our 3532 * release function gets called, which will drop the remaining 3533 * parent reference and free the data structure. 3534 */ 3535 put_device(dev); /* for self-reference */ 3536 3537 return 0; /* SUCCESS */ 3538 } 3539 EXPORT_SYMBOL(fc_vport_terminate); 3540 3541 /** 3542 * fc_vport_sched_delete - workq-based delete request for a vport 3543 * @work: vport to be deleted. 3544 */ 3545 static void 3546 fc_vport_sched_delete(struct work_struct *work) 3547 { 3548 struct fc_vport *vport = 3549 container_of(work, struct fc_vport, vport_delete_work); 3550 int stat; 3551 3552 stat = fc_vport_terminate(vport); 3553 if (stat) 3554 dev_printk(KERN_ERR, vport->dev.parent, 3555 "%s: %s could not be deleted created via " 3556 "shost%d channel %d - error %d\n", __func__, 3557 dev_name(&vport->dev), vport->shost->host_no, 3558 vport->channel, stat); 3559 } 3560 3561 3562 /* 3563 * BSG support 3564 */ 3565 3566 3567 /** 3568 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job 3569 * @job: fc_bsg_job that is to be torn down 3570 */ 3571 static void 3572 fc_destroy_bsgjob(struct fc_bsg_job *job) 3573 { 3574 unsigned long flags; 3575 3576 spin_lock_irqsave(&job->job_lock, flags); 3577 if (job->ref_cnt) { 3578 spin_unlock_irqrestore(&job->job_lock, flags); 3579 return; 3580 } 3581 spin_unlock_irqrestore(&job->job_lock, flags); 3582 3583 put_device(job->dev); /* release reference for the request */ 3584 3585 kfree(job->request_payload.sg_list); 3586 kfree(job->reply_payload.sg_list); 3587 kfree(job); 3588 } 3589 3590 /** 3591 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has 3592 * completed 3593 * @job: fc_bsg_job that is complete 3594 */ 3595 static void 3596 fc_bsg_jobdone(struct fc_bsg_job *job) 3597 { 3598 struct request *req = job->req; 3599 struct request *rsp = req->next_rq; 3600 int err; 3601 3602 err = job->req->errors = job->reply->result; 3603 3604 if (err < 0) 3605 /* we're only returning the result field in the reply */ 3606 job->req->sense_len = sizeof(uint32_t); 3607 else 3608 job->req->sense_len = job->reply_len; 3609 3610 /* we assume all request payload was transferred, residual == 0 */ 3611 req->resid_len = 0; 3612 3613 if (rsp) { 3614 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); 3615 3616 /* set reply (bidi) residual */ 3617 rsp->resid_len -= min(job->reply->reply_payload_rcv_len, 3618 rsp->resid_len); 3619 } 3620 blk_complete_request(req); 3621 } 3622 3623 /** 3624 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests 3625 * @rq: BSG request that holds the job to be destroyed 3626 */ 3627 static void fc_bsg_softirq_done(struct request *rq) 3628 { 3629 struct fc_bsg_job *job = rq->special; 3630 unsigned long flags; 3631 3632 spin_lock_irqsave(&job->job_lock, flags); 3633 job->state_flags |= FC_RQST_STATE_DONE; 3634 job->ref_cnt--; 3635 spin_unlock_irqrestore(&job->job_lock, flags); 3636 3637 blk_end_request_all(rq, rq->errors); 3638 fc_destroy_bsgjob(job); 3639 } 3640 3641 /** 3642 * fc_bsg_job_timeout - handler for when a bsg request timesout 3643 * @req: request that timed out 3644 */ 3645 static enum blk_eh_timer_return 3646 fc_bsg_job_timeout(struct request *req) 3647 { 3648 struct fc_bsg_job *job = (void *) req->special; 3649 struct Scsi_Host *shost = job->shost; 3650 struct fc_internal *i = to_fc_internal(shost->transportt); 3651 unsigned long flags; 3652 int err = 0, done = 0; 3653 3654 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) 3655 return BLK_EH_RESET_TIMER; 3656 3657 spin_lock_irqsave(&job->job_lock, flags); 3658 if (job->state_flags & FC_RQST_STATE_DONE) 3659 done = 1; 3660 else 3661 job->ref_cnt++; 3662 spin_unlock_irqrestore(&job->job_lock, flags); 3663 3664 if (!done && i->f->bsg_timeout) { 3665 /* call LLDD to abort the i/o as it has timed out */ 3666 err = i->f->bsg_timeout(job); 3667 if (err == -EAGAIN) { 3668 job->ref_cnt--; 3669 return BLK_EH_RESET_TIMER; 3670 } else if (err) 3671 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3672 "abort failed with status %d\n", err); 3673 } 3674 3675 /* the blk_end_sync_io() doesn't check the error */ 3676 if (done) 3677 return BLK_EH_NOT_HANDLED; 3678 else 3679 return BLK_EH_HANDLED; 3680 } 3681 3682 static int 3683 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) 3684 { 3685 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); 3686 3687 BUG_ON(!req->nr_phys_segments); 3688 3689 buf->sg_list = kzalloc(sz, GFP_KERNEL); 3690 if (!buf->sg_list) 3691 return -ENOMEM; 3692 sg_init_table(buf->sg_list, req->nr_phys_segments); 3693 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); 3694 buf->payload_len = blk_rq_bytes(req); 3695 return 0; 3696 } 3697 3698 3699 /** 3700 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the 3701 * bsg request 3702 * @shost: SCSI Host corresponding to the bsg object 3703 * @rport: (optional) FC Remote Port corresponding to the bsg object 3704 * @req: BSG request that needs a job structure 3705 */ 3706 static int 3707 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, 3708 struct request *req) 3709 { 3710 struct fc_internal *i = to_fc_internal(shost->transportt); 3711 struct request *rsp = req->next_rq; 3712 struct fc_bsg_job *job; 3713 int ret; 3714 3715 BUG_ON(req->special); 3716 3717 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, 3718 GFP_KERNEL); 3719 if (!job) 3720 return -ENOMEM; 3721 3722 /* 3723 * Note: this is a bit silly. 3724 * The request gets formatted as a SGIO v4 ioctl request, which 3725 * then gets reformatted as a blk request, which then gets 3726 * reformatted as a fc bsg request. And on completion, we have 3727 * to wrap return results such that SGIO v4 thinks it was a scsi 3728 * status. I hope this was all worth it. 3729 */ 3730 3731 req->special = job; 3732 job->shost = shost; 3733 job->rport = rport; 3734 job->req = req; 3735 if (i->f->dd_bsg_size) 3736 job->dd_data = (void *)&job[1]; 3737 spin_lock_init(&job->job_lock); 3738 job->request = (struct fc_bsg_request *)req->cmd; 3739 job->request_len = req->cmd_len; 3740 job->reply = req->sense; 3741 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer 3742 * allocated */ 3743 if (req->bio) { 3744 ret = fc_bsg_map_buffer(&job->request_payload, req); 3745 if (ret) 3746 goto failjob_rls_job; 3747 } 3748 if (rsp && rsp->bio) { 3749 ret = fc_bsg_map_buffer(&job->reply_payload, rsp); 3750 if (ret) 3751 goto failjob_rls_rqst_payload; 3752 } 3753 job->job_done = fc_bsg_jobdone; 3754 if (rport) 3755 job->dev = &rport->dev; 3756 else 3757 job->dev = &shost->shost_gendev; 3758 get_device(job->dev); /* take a reference for the request */ 3759 3760 job->ref_cnt = 1; 3761 3762 return 0; 3763 3764 3765 failjob_rls_rqst_payload: 3766 kfree(job->request_payload.sg_list); 3767 failjob_rls_job: 3768 kfree(job); 3769 return -ENOMEM; 3770 } 3771 3772 3773 enum fc_dispatch_result { 3774 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ 3775 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ 3776 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ 3777 }; 3778 3779 3780 /** 3781 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3782 * @q: fc host request queue 3783 * @shost: scsi host rport attached to 3784 * @job: bsg job to be processed 3785 */ 3786 static enum fc_dispatch_result 3787 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3788 struct fc_bsg_job *job) 3789 { 3790 struct fc_internal *i = to_fc_internal(shost->transportt); 3791 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3792 int ret; 3793 3794 /* Validate the host command */ 3795 switch (job->request->msgcode) { 3796 case FC_BSG_HST_ADD_RPORT: 3797 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3798 break; 3799 3800 case FC_BSG_HST_DEL_RPORT: 3801 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3802 break; 3803 3804 case FC_BSG_HST_ELS_NOLOGIN: 3805 cmdlen += sizeof(struct fc_bsg_host_els); 3806 /* there better be a xmt and rcv payloads */ 3807 if ((!job->request_payload.payload_len) || 3808 (!job->reply_payload.payload_len)) { 3809 ret = -EINVAL; 3810 goto fail_host_msg; 3811 } 3812 break; 3813 3814 case FC_BSG_HST_CT: 3815 cmdlen += sizeof(struct fc_bsg_host_ct); 3816 /* there better be xmt and rcv payloads */ 3817 if ((!job->request_payload.payload_len) || 3818 (!job->reply_payload.payload_len)) { 3819 ret = -EINVAL; 3820 goto fail_host_msg; 3821 } 3822 break; 3823 3824 case FC_BSG_HST_VENDOR: 3825 cmdlen += sizeof(struct fc_bsg_host_vendor); 3826 if ((shost->hostt->vendor_id == 0L) || 3827 (job->request->rqst_data.h_vendor.vendor_id != 3828 shost->hostt->vendor_id)) { 3829 ret = -ESRCH; 3830 goto fail_host_msg; 3831 } 3832 break; 3833 3834 default: 3835 ret = -EBADR; 3836 goto fail_host_msg; 3837 } 3838 3839 /* check if we really have all the request data needed */ 3840 if (job->request_len < cmdlen) { 3841 ret = -ENOMSG; 3842 goto fail_host_msg; 3843 } 3844 3845 ret = i->f->bsg_request(job); 3846 if (!ret) 3847 return FC_DISPATCH_UNLOCKED; 3848 3849 fail_host_msg: 3850 /* return the errno failure code as the only status */ 3851 BUG_ON(job->reply_len < sizeof(uint32_t)); 3852 job->reply->reply_payload_rcv_len = 0; 3853 job->reply->result = ret; 3854 job->reply_len = sizeof(uint32_t); 3855 fc_bsg_jobdone(job); 3856 return FC_DISPATCH_UNLOCKED; 3857 } 3858 3859 3860 /* 3861 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3862 * @rport: rport to be restarted 3863 */ 3864 static void 3865 fc_bsg_goose_queue(struct fc_rport *rport) 3866 { 3867 if (!rport->rqst_q) 3868 return; 3869 3870 /* 3871 * This get/put dance makes no sense 3872 */ 3873 get_device(&rport->dev); 3874 blk_run_queue_async(rport->rqst_q); 3875 put_device(&rport->dev); 3876 } 3877 3878 /** 3879 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3880 * @q: rport request queue 3881 * @shost: scsi host rport attached to 3882 * @rport: rport request destined to 3883 * @job: bsg job to be processed 3884 */ 3885 static enum fc_dispatch_result 3886 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3887 struct fc_rport *rport, struct fc_bsg_job *job) 3888 { 3889 struct fc_internal *i = to_fc_internal(shost->transportt); 3890 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3891 int ret; 3892 3893 /* Validate the rport command */ 3894 switch (job->request->msgcode) { 3895 case FC_BSG_RPT_ELS: 3896 cmdlen += sizeof(struct fc_bsg_rport_els); 3897 goto check_bidi; 3898 3899 case FC_BSG_RPT_CT: 3900 cmdlen += sizeof(struct fc_bsg_rport_ct); 3901 check_bidi: 3902 /* there better be xmt and rcv payloads */ 3903 if ((!job->request_payload.payload_len) || 3904 (!job->reply_payload.payload_len)) { 3905 ret = -EINVAL; 3906 goto fail_rport_msg; 3907 } 3908 break; 3909 default: 3910 ret = -EBADR; 3911 goto fail_rport_msg; 3912 } 3913 3914 /* check if we really have all the request data needed */ 3915 if (job->request_len < cmdlen) { 3916 ret = -ENOMSG; 3917 goto fail_rport_msg; 3918 } 3919 3920 ret = i->f->bsg_request(job); 3921 if (!ret) 3922 return FC_DISPATCH_UNLOCKED; 3923 3924 fail_rport_msg: 3925 /* return the errno failure code as the only status */ 3926 BUG_ON(job->reply_len < sizeof(uint32_t)); 3927 job->reply->reply_payload_rcv_len = 0; 3928 job->reply->result = ret; 3929 job->reply_len = sizeof(uint32_t); 3930 fc_bsg_jobdone(job); 3931 return FC_DISPATCH_UNLOCKED; 3932 } 3933 3934 3935 /** 3936 * fc_bsg_request_handler - generic handler for bsg requests 3937 * @q: request queue to manage 3938 * @shost: Scsi_Host related to the bsg object 3939 * @rport: FC remote port related to the bsg object (optional) 3940 * @dev: device structure for bsg object 3941 */ 3942 static void 3943 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, 3944 struct fc_rport *rport, struct device *dev) 3945 { 3946 struct request *req; 3947 struct fc_bsg_job *job; 3948 enum fc_dispatch_result ret; 3949 3950 if (!get_device(dev)) 3951 return; 3952 3953 while (1) { 3954 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && 3955 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3956 break; 3957 3958 req = blk_fetch_request(q); 3959 if (!req) 3960 break; 3961 3962 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { 3963 req->errors = -ENXIO; 3964 spin_unlock_irq(q->queue_lock); 3965 blk_end_request_all(req, -ENXIO); 3966 spin_lock_irq(q->queue_lock); 3967 continue; 3968 } 3969 3970 spin_unlock_irq(q->queue_lock); 3971 3972 ret = fc_req_to_bsgjob(shost, rport, req); 3973 if (ret) { 3974 req->errors = ret; 3975 blk_end_request_all(req, ret); 3976 spin_lock_irq(q->queue_lock); 3977 continue; 3978 } 3979 3980 job = req->special; 3981 3982 /* check if we have the msgcode value at least */ 3983 if (job->request_len < sizeof(uint32_t)) { 3984 BUG_ON(job->reply_len < sizeof(uint32_t)); 3985 job->reply->reply_payload_rcv_len = 0; 3986 job->reply->result = -ENOMSG; 3987 job->reply_len = sizeof(uint32_t); 3988 fc_bsg_jobdone(job); 3989 spin_lock_irq(q->queue_lock); 3990 continue; 3991 } 3992 3993 /* the dispatch routines will unlock the queue_lock */ 3994 if (rport) 3995 ret = fc_bsg_rport_dispatch(q, shost, rport, job); 3996 else 3997 ret = fc_bsg_host_dispatch(q, shost, job); 3998 3999 /* did dispatcher hit state that can't process any more */ 4000 if (ret == FC_DISPATCH_BREAK) 4001 break; 4002 4003 /* did dispatcher had released the lock */ 4004 if (ret == FC_DISPATCH_UNLOCKED) 4005 spin_lock_irq(q->queue_lock); 4006 } 4007 4008 spin_unlock_irq(q->queue_lock); 4009 put_device(dev); 4010 spin_lock_irq(q->queue_lock); 4011 } 4012 4013 4014 /** 4015 * fc_bsg_host_handler - handler for bsg requests for a fc host 4016 * @q: fc host request queue 4017 */ 4018 static void 4019 fc_bsg_host_handler(struct request_queue *q) 4020 { 4021 struct Scsi_Host *shost = q->queuedata; 4022 4023 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); 4024 } 4025 4026 4027 /** 4028 * fc_bsg_rport_handler - handler for bsg requests for a fc rport 4029 * @q: rport request queue 4030 */ 4031 static void 4032 fc_bsg_rport_handler(struct request_queue *q) 4033 { 4034 struct fc_rport *rport = q->queuedata; 4035 struct Scsi_Host *shost = rport_to_shost(rport); 4036 4037 fc_bsg_request_handler(q, shost, rport, &rport->dev); 4038 } 4039 4040 4041 /** 4042 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4043 * @shost: shost for fc_host 4044 * @fc_host: fc_host adding the structures to 4045 */ 4046 static int 4047 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4048 { 4049 struct device *dev = &shost->shost_gendev; 4050 struct fc_internal *i = to_fc_internal(shost->transportt); 4051 struct request_queue *q; 4052 int err; 4053 char bsg_name[20]; 4054 4055 fc_host->rqst_q = NULL; 4056 4057 if (!i->f->bsg_request) 4058 return -ENOTSUPP; 4059 4060 snprintf(bsg_name, sizeof(bsg_name), 4061 "fc_host%d", shost->host_no); 4062 4063 q = __scsi_alloc_queue(shost, fc_bsg_host_handler); 4064 if (!q) { 4065 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4066 "initialize - no request queue\n", 4067 shost->host_no); 4068 return -ENOMEM; 4069 } 4070 4071 q->queuedata = shost; 4072 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4073 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4074 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4075 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4076 4077 err = bsg_register_queue(q, dev, bsg_name, NULL); 4078 if (err) { 4079 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4080 "initialize - register queue\n", 4081 shost->host_no); 4082 blk_cleanup_queue(q); 4083 return err; 4084 } 4085 4086 fc_host->rqst_q = q; 4087 return 0; 4088 } 4089 4090 4091 /** 4092 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4093 * @shost: shost that rport is attached to 4094 * @rport: rport that the bsg hooks are being attached to 4095 */ 4096 static int 4097 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4098 { 4099 struct device *dev = &rport->dev; 4100 struct fc_internal *i = to_fc_internal(shost->transportt); 4101 struct request_queue *q; 4102 int err; 4103 4104 rport->rqst_q = NULL; 4105 4106 if (!i->f->bsg_request) 4107 return -ENOTSUPP; 4108 4109 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); 4110 if (!q) { 4111 printk(KERN_ERR "%s: bsg interface failed to " 4112 "initialize - no request queue\n", 4113 dev->kobj.name); 4114 return -ENOMEM; 4115 } 4116 4117 q->queuedata = rport; 4118 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4119 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4120 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4121 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4122 4123 err = bsg_register_queue(q, dev, NULL, NULL); 4124 if (err) { 4125 printk(KERN_ERR "%s: bsg interface failed to " 4126 "initialize - register queue\n", 4127 dev->kobj.name); 4128 blk_cleanup_queue(q); 4129 return err; 4130 } 4131 4132 rport->rqst_q = q; 4133 return 0; 4134 } 4135 4136 4137 /** 4138 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4139 * @q: the request_queue that is to be torn down. 4140 * 4141 * Notes: 4142 * Before unregistering the queue empty any requests that are blocked 4143 * 4144 * 4145 */ 4146 static void 4147 fc_bsg_remove(struct request_queue *q) 4148 { 4149 if (q) { 4150 bsg_unregister_queue(q); 4151 blk_cleanup_queue(q); 4152 } 4153 } 4154 4155 4156 /* Original Author: Martin Hicks */ 4157 MODULE_AUTHOR("James Smart"); 4158 MODULE_DESCRIPTION("FC Transport Attributes"); 4159 MODULE_LICENSE("GPL"); 4160 4161 module_init(fc_transport_init); 4162 module_exit(fc_transport_exit); 4163