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 1748 static ssize_t 1749 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1750 const char *buf, size_t count) 1751 { 1752 struct Scsi_Host *shost = transport_class_to_shost(dev); 1753 struct fc_internal *i = to_fc_internal(shost->transportt); 1754 1755 /* ignore any data value written to the attribute */ 1756 if (i->f->reset_fc_host_stats) { 1757 i->f->reset_fc_host_stats(shost); 1758 return count; 1759 } 1760 1761 return -ENOENT; 1762 } 1763 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1764 fc_reset_statistics); 1765 1766 static struct attribute *fc_statistics_attrs[] = { 1767 &device_attr_host_seconds_since_last_reset.attr, 1768 &device_attr_host_tx_frames.attr, 1769 &device_attr_host_tx_words.attr, 1770 &device_attr_host_rx_frames.attr, 1771 &device_attr_host_rx_words.attr, 1772 &device_attr_host_lip_count.attr, 1773 &device_attr_host_nos_count.attr, 1774 &device_attr_host_error_frames.attr, 1775 &device_attr_host_dumped_frames.attr, 1776 &device_attr_host_link_failure_count.attr, 1777 &device_attr_host_loss_of_sync_count.attr, 1778 &device_attr_host_loss_of_signal_count.attr, 1779 &device_attr_host_prim_seq_protocol_err_count.attr, 1780 &device_attr_host_invalid_tx_word_count.attr, 1781 &device_attr_host_invalid_crc_count.attr, 1782 &device_attr_host_fcp_input_requests.attr, 1783 &device_attr_host_fcp_output_requests.attr, 1784 &device_attr_host_fcp_control_requests.attr, 1785 &device_attr_host_fcp_input_megabytes.attr, 1786 &device_attr_host_fcp_output_megabytes.attr, 1787 &device_attr_host_reset_statistics.attr, 1788 NULL 1789 }; 1790 1791 static struct attribute_group fc_statistics_group = { 1792 .name = "statistics", 1793 .attrs = fc_statistics_attrs, 1794 }; 1795 1796 1797 /* Host Vport Attributes */ 1798 1799 static int 1800 fc_parse_wwn(const char *ns, u64 *nm) 1801 { 1802 unsigned int i, j; 1803 u8 wwn[8]; 1804 1805 memset(wwn, 0, sizeof(wwn)); 1806 1807 /* Validate and store the new name */ 1808 for (i=0, j=0; i < 16; i++) { 1809 int value; 1810 1811 value = hex_to_bin(*ns++); 1812 if (value >= 0) 1813 j = (j << 4) | value; 1814 else 1815 return -EINVAL; 1816 if (i % 2) { 1817 wwn[i/2] = j & 0xff; 1818 j = 0; 1819 } 1820 } 1821 1822 *nm = wwn_to_u64(wwn); 1823 1824 return 0; 1825 } 1826 1827 1828 /* 1829 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1830 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1831 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1832 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1833 */ 1834 static ssize_t 1835 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1836 const char *buf, size_t count) 1837 { 1838 struct Scsi_Host *shost = transport_class_to_shost(dev); 1839 struct fc_vport_identifiers vid; 1840 struct fc_vport *vport; 1841 unsigned int cnt=count; 1842 int stat; 1843 1844 memset(&vid, 0, sizeof(vid)); 1845 1846 /* count may include a LF at end of string */ 1847 if (buf[cnt-1] == '\n') 1848 cnt--; 1849 1850 /* validate we have enough characters for WWPN */ 1851 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1852 return -EINVAL; 1853 1854 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1855 if (stat) 1856 return stat; 1857 1858 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1859 if (stat) 1860 return stat; 1861 1862 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1863 vid.vport_type = FC_PORTTYPE_NPIV; 1864 /* vid.symbolic_name is already zero/NULL's */ 1865 vid.disable = false; /* always enabled */ 1866 1867 /* we only allow support on Channel 0 !!! */ 1868 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1869 return stat ? stat : count; 1870 } 1871 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1872 store_fc_host_vport_create); 1873 1874 1875 /* 1876 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1877 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1878 * The WWNs are specified as hex characters, and may *not* contain 1879 * any prefixes (e.g. 0x, x, etc) 1880 */ 1881 static ssize_t 1882 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1883 const char *buf, size_t count) 1884 { 1885 struct Scsi_Host *shost = transport_class_to_shost(dev); 1886 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1887 struct fc_vport *vport; 1888 u64 wwpn, wwnn; 1889 unsigned long flags; 1890 unsigned int cnt=count; 1891 int stat, match; 1892 1893 /* count may include a LF at end of string */ 1894 if (buf[cnt-1] == '\n') 1895 cnt--; 1896 1897 /* validate we have enough characters for WWPN */ 1898 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1899 return -EINVAL; 1900 1901 stat = fc_parse_wwn(&buf[0], &wwpn); 1902 if (stat) 1903 return stat; 1904 1905 stat = fc_parse_wwn(&buf[17], &wwnn); 1906 if (stat) 1907 return stat; 1908 1909 spin_lock_irqsave(shost->host_lock, flags); 1910 match = 0; 1911 /* we only allow support on Channel 0 !!! */ 1912 list_for_each_entry(vport, &fc_host->vports, peers) { 1913 if ((vport->channel == 0) && 1914 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1915 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1916 break; 1917 vport->flags |= FC_VPORT_DELETING; 1918 match = 1; 1919 break; 1920 } 1921 } 1922 spin_unlock_irqrestore(shost->host_lock, flags); 1923 1924 if (!match) 1925 return -ENODEV; 1926 1927 stat = fc_vport_terminate(vport); 1928 return stat ? stat : count; 1929 } 1930 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1931 store_fc_host_vport_delete); 1932 1933 1934 static int fc_host_match(struct attribute_container *cont, 1935 struct device *dev) 1936 { 1937 struct Scsi_Host *shost; 1938 struct fc_internal *i; 1939 1940 if (!scsi_is_host_device(dev)) 1941 return 0; 1942 1943 shost = dev_to_shost(dev); 1944 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1945 != &fc_host_class.class) 1946 return 0; 1947 1948 i = to_fc_internal(shost->transportt); 1949 1950 return &i->t.host_attrs.ac == cont; 1951 } 1952 1953 static int fc_target_match(struct attribute_container *cont, 1954 struct device *dev) 1955 { 1956 struct Scsi_Host *shost; 1957 struct fc_internal *i; 1958 1959 if (!scsi_is_target_device(dev)) 1960 return 0; 1961 1962 shost = dev_to_shost(dev->parent); 1963 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1964 != &fc_host_class.class) 1965 return 0; 1966 1967 i = to_fc_internal(shost->transportt); 1968 1969 return &i->t.target_attrs.ac == cont; 1970 } 1971 1972 static void fc_rport_dev_release(struct device *dev) 1973 { 1974 struct fc_rport *rport = dev_to_rport(dev); 1975 put_device(dev->parent); 1976 kfree(rport); 1977 } 1978 1979 int scsi_is_fc_rport(const struct device *dev) 1980 { 1981 return dev->release == fc_rport_dev_release; 1982 } 1983 EXPORT_SYMBOL(scsi_is_fc_rport); 1984 1985 static int fc_rport_match(struct attribute_container *cont, 1986 struct device *dev) 1987 { 1988 struct Scsi_Host *shost; 1989 struct fc_internal *i; 1990 1991 if (!scsi_is_fc_rport(dev)) 1992 return 0; 1993 1994 shost = dev_to_shost(dev->parent); 1995 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1996 != &fc_host_class.class) 1997 return 0; 1998 1999 i = to_fc_internal(shost->transportt); 2000 2001 return &i->rport_attr_cont.ac == cont; 2002 } 2003 2004 2005 static void fc_vport_dev_release(struct device *dev) 2006 { 2007 struct fc_vport *vport = dev_to_vport(dev); 2008 put_device(dev->parent); /* release kobj parent */ 2009 kfree(vport); 2010 } 2011 2012 int scsi_is_fc_vport(const struct device *dev) 2013 { 2014 return dev->release == fc_vport_dev_release; 2015 } 2016 EXPORT_SYMBOL(scsi_is_fc_vport); 2017 2018 static int fc_vport_match(struct attribute_container *cont, 2019 struct device *dev) 2020 { 2021 struct fc_vport *vport; 2022 struct Scsi_Host *shost; 2023 struct fc_internal *i; 2024 2025 if (!scsi_is_fc_vport(dev)) 2026 return 0; 2027 vport = dev_to_vport(dev); 2028 2029 shost = vport_to_shost(vport); 2030 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2031 != &fc_host_class.class) 2032 return 0; 2033 2034 i = to_fc_internal(shost->transportt); 2035 return &i->vport_attr_cont.ac == cont; 2036 } 2037 2038 2039 /** 2040 * fc_timed_out - FC Transport I/O timeout intercept handler 2041 * @scmd: The SCSI command which timed out 2042 * 2043 * This routine protects against error handlers getting invoked while a 2044 * rport is in a blocked state, typically due to a temporarily loss of 2045 * connectivity. If the error handlers are allowed to proceed, requests 2046 * to abort i/o, reset the target, etc will likely fail as there is no way 2047 * to communicate with the device to perform the requested function. These 2048 * failures may result in the midlayer taking the device offline, requiring 2049 * manual intervention to restore operation. 2050 * 2051 * This routine, called whenever an i/o times out, validates the state of 2052 * the underlying rport. If the rport is blocked, it returns 2053 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2054 * Eventually, either the device will return, or devloss_tmo will fire, 2055 * and when the timeout then fires, it will be handled normally. 2056 * If the rport is not blocked, normal error handling continues. 2057 * 2058 * Notes: 2059 * This routine assumes no locks are held on entry. 2060 */ 2061 static enum blk_eh_timer_return 2062 fc_timed_out(struct scsi_cmnd *scmd) 2063 { 2064 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2065 2066 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2067 return BLK_EH_RESET_TIMER; 2068 2069 return BLK_EH_NOT_HANDLED; 2070 } 2071 2072 /* 2073 * Called by fc_user_scan to locate an rport on the shost that 2074 * matches the channel and target id, and invoke scsi_scan_target() 2075 * on the rport. 2076 */ 2077 static void 2078 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2079 { 2080 struct fc_rport *rport; 2081 unsigned long flags; 2082 2083 spin_lock_irqsave(shost->host_lock, flags); 2084 2085 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2086 if (rport->scsi_target_id == -1) 2087 continue; 2088 2089 if (rport->port_state != FC_PORTSTATE_ONLINE) 2090 continue; 2091 2092 if ((channel == rport->channel) && 2093 (id == rport->scsi_target_id)) { 2094 spin_unlock_irqrestore(shost->host_lock, flags); 2095 scsi_scan_target(&rport->dev, channel, id, lun, 1); 2096 return; 2097 } 2098 } 2099 2100 spin_unlock_irqrestore(shost->host_lock, flags); 2101 } 2102 2103 /* 2104 * Called via sysfs scan routines. Necessary, as the FC transport 2105 * wants to place all target objects below the rport object. So this 2106 * routine must invoke the scsi_scan_target() routine with the rport 2107 * object as the parent. 2108 */ 2109 static int 2110 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2111 { 2112 uint chlo, chhi; 2113 uint tgtlo, tgthi; 2114 2115 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2116 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2117 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2118 return -EINVAL; 2119 2120 if (channel == SCAN_WILD_CARD) { 2121 chlo = 0; 2122 chhi = shost->max_channel + 1; 2123 } else { 2124 chlo = channel; 2125 chhi = channel + 1; 2126 } 2127 2128 if (id == SCAN_WILD_CARD) { 2129 tgtlo = 0; 2130 tgthi = shost->max_id; 2131 } else { 2132 tgtlo = id; 2133 tgthi = id + 1; 2134 } 2135 2136 for ( ; chlo < chhi; chlo++) 2137 for ( ; tgtlo < tgthi; tgtlo++) 2138 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2139 2140 return 0; 2141 } 2142 2143 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, 2144 int result) 2145 { 2146 struct fc_internal *i = to_fc_internal(shost->transportt); 2147 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); 2148 } 2149 2150 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) 2151 { 2152 struct fc_internal *i = to_fc_internal(shost->transportt); 2153 return i->f->it_nexus_response(shost, nexus, result); 2154 } 2155 2156 struct scsi_transport_template * 2157 fc_attach_transport(struct fc_function_template *ft) 2158 { 2159 int count; 2160 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2161 GFP_KERNEL); 2162 2163 if (unlikely(!i)) 2164 return NULL; 2165 2166 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2167 i->t.target_attrs.ac.class = &fc_transport_class.class; 2168 i->t.target_attrs.ac.match = fc_target_match; 2169 i->t.target_size = sizeof(struct fc_starget_attrs); 2170 transport_container_register(&i->t.target_attrs); 2171 2172 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2173 i->t.host_attrs.ac.class = &fc_host_class.class; 2174 i->t.host_attrs.ac.match = fc_host_match; 2175 i->t.host_size = sizeof(struct fc_host_attrs); 2176 if (ft->get_fc_host_stats) 2177 i->t.host_attrs.statistics = &fc_statistics_group; 2178 transport_container_register(&i->t.host_attrs); 2179 2180 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2181 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2182 i->rport_attr_cont.ac.match = fc_rport_match; 2183 transport_container_register(&i->rport_attr_cont); 2184 2185 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2186 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2187 i->vport_attr_cont.ac.match = fc_vport_match; 2188 transport_container_register(&i->vport_attr_cont); 2189 2190 i->f = ft; 2191 2192 /* Transport uses the shost workq for scsi scanning */ 2193 i->t.create_work_queue = 1; 2194 2195 i->t.eh_timed_out = fc_timed_out; 2196 2197 i->t.user_scan = fc_user_scan; 2198 2199 /* target-mode drivers' functions */ 2200 i->t.tsk_mgmt_response = fc_tsk_mgmt_response; 2201 i->t.it_nexus_response = fc_it_nexus_response; 2202 2203 /* 2204 * Setup SCSI Target Attributes. 2205 */ 2206 count = 0; 2207 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2208 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2209 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2210 2211 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2212 2213 i->starget_attrs[count] = NULL; 2214 2215 2216 /* 2217 * Setup SCSI Host Attributes. 2218 */ 2219 count=0; 2220 SETUP_HOST_ATTRIBUTE_RD(node_name); 2221 SETUP_HOST_ATTRIBUTE_RD(port_name); 2222 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2223 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2224 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2225 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2226 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2227 if (ft->vport_create) { 2228 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2229 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2230 } 2231 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2232 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2233 SETUP_HOST_ATTRIBUTE_RD(model); 2234 SETUP_HOST_ATTRIBUTE_RD(model_description); 2235 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2236 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2237 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2238 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2239 2240 SETUP_HOST_ATTRIBUTE_RD(port_id); 2241 SETUP_HOST_ATTRIBUTE_RD(port_type); 2242 SETUP_HOST_ATTRIBUTE_RD(port_state); 2243 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2244 SETUP_HOST_ATTRIBUTE_RD(speed); 2245 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2246 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2247 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2248 2249 /* Transport-managed attributes */ 2250 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2251 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2252 if (ft->issue_fc_host_lip) 2253 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2254 if (ft->vport_create) 2255 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2256 if (ft->vport_delete) 2257 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2258 2259 BUG_ON(count > FC_HOST_NUM_ATTRS); 2260 2261 i->host_attrs[count] = NULL; 2262 2263 /* 2264 * Setup Remote Port Attributes. 2265 */ 2266 count=0; 2267 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2268 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2269 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2270 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2271 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2272 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2273 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2274 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2275 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2276 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2277 2278 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2279 2280 i->rport_attrs[count] = NULL; 2281 2282 /* 2283 * Setup Virtual Port Attributes. 2284 */ 2285 count=0; 2286 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2287 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2288 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2289 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2290 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2291 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2292 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2293 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2294 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2295 2296 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2297 2298 i->vport_attrs[count] = NULL; 2299 2300 return &i->t; 2301 } 2302 EXPORT_SYMBOL(fc_attach_transport); 2303 2304 void fc_release_transport(struct scsi_transport_template *t) 2305 { 2306 struct fc_internal *i = to_fc_internal(t); 2307 2308 transport_container_unregister(&i->t.target_attrs); 2309 transport_container_unregister(&i->t.host_attrs); 2310 transport_container_unregister(&i->rport_attr_cont); 2311 transport_container_unregister(&i->vport_attr_cont); 2312 2313 kfree(i); 2314 } 2315 EXPORT_SYMBOL(fc_release_transport); 2316 2317 /** 2318 * fc_queue_work - Queue work to the fc_host workqueue. 2319 * @shost: Pointer to Scsi_Host bound to fc_host. 2320 * @work: Work to queue for execution. 2321 * 2322 * Return value: 2323 * 1 - work queued for execution 2324 * 0 - work is already queued 2325 * -EINVAL - work queue doesn't exist 2326 */ 2327 static int 2328 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2329 { 2330 if (unlikely(!fc_host_work_q(shost))) { 2331 printk(KERN_ERR 2332 "ERROR: FC host '%s' attempted to queue work, " 2333 "when no workqueue created.\n", shost->hostt->name); 2334 dump_stack(); 2335 2336 return -EINVAL; 2337 } 2338 2339 return queue_work(fc_host_work_q(shost), work); 2340 } 2341 2342 /** 2343 * fc_flush_work - Flush a fc_host's workqueue. 2344 * @shost: Pointer to Scsi_Host bound to fc_host. 2345 */ 2346 static void 2347 fc_flush_work(struct Scsi_Host *shost) 2348 { 2349 if (!fc_host_work_q(shost)) { 2350 printk(KERN_ERR 2351 "ERROR: FC host '%s' attempted to flush work, " 2352 "when no workqueue created.\n", shost->hostt->name); 2353 dump_stack(); 2354 return; 2355 } 2356 2357 flush_workqueue(fc_host_work_q(shost)); 2358 } 2359 2360 /** 2361 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2362 * @shost: Pointer to Scsi_Host bound to fc_host. 2363 * @work: Work to queue for execution. 2364 * @delay: jiffies to delay the work queuing 2365 * 2366 * Return value: 2367 * 1 on success / 0 already queued / < 0 for error 2368 */ 2369 static int 2370 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2371 unsigned long delay) 2372 { 2373 if (unlikely(!fc_host_devloss_work_q(shost))) { 2374 printk(KERN_ERR 2375 "ERROR: FC host '%s' attempted to queue work, " 2376 "when no workqueue created.\n", shost->hostt->name); 2377 dump_stack(); 2378 2379 return -EINVAL; 2380 } 2381 2382 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2383 } 2384 2385 /** 2386 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2387 * @shost: Pointer to Scsi_Host bound to fc_host. 2388 */ 2389 static void 2390 fc_flush_devloss(struct Scsi_Host *shost) 2391 { 2392 if (!fc_host_devloss_work_q(shost)) { 2393 printk(KERN_ERR 2394 "ERROR: FC host '%s' attempted to flush work, " 2395 "when no workqueue created.\n", shost->hostt->name); 2396 dump_stack(); 2397 return; 2398 } 2399 2400 flush_workqueue(fc_host_devloss_work_q(shost)); 2401 } 2402 2403 2404 /** 2405 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2406 * @shost: Which &Scsi_Host 2407 * 2408 * This routine is expected to be called immediately preceding the 2409 * a driver's call to scsi_remove_host(). 2410 * 2411 * WARNING: A driver utilizing the fc_transport, which fails to call 2412 * this routine prior to scsi_remove_host(), will leave dangling 2413 * objects in /sys/class/fc_remote_ports. Access to any of these 2414 * objects can result in a system crash !!! 2415 * 2416 * Notes: 2417 * This routine assumes no locks are held on entry. 2418 */ 2419 void 2420 fc_remove_host(struct Scsi_Host *shost) 2421 { 2422 struct fc_vport *vport = NULL, *next_vport = NULL; 2423 struct fc_rport *rport = NULL, *next_rport = NULL; 2424 struct workqueue_struct *work_q; 2425 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2426 unsigned long flags; 2427 2428 spin_lock_irqsave(shost->host_lock, flags); 2429 2430 /* Remove any vports */ 2431 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) 2432 fc_queue_work(shost, &vport->vport_delete_work); 2433 2434 /* Remove any remote ports */ 2435 list_for_each_entry_safe(rport, next_rport, 2436 &fc_host->rports, peers) { 2437 list_del(&rport->peers); 2438 rport->port_state = FC_PORTSTATE_DELETED; 2439 fc_queue_work(shost, &rport->rport_delete_work); 2440 } 2441 2442 list_for_each_entry_safe(rport, next_rport, 2443 &fc_host->rport_bindings, peers) { 2444 list_del(&rport->peers); 2445 rport->port_state = FC_PORTSTATE_DELETED; 2446 fc_queue_work(shost, &rport->rport_delete_work); 2447 } 2448 2449 spin_unlock_irqrestore(shost->host_lock, flags); 2450 2451 /* flush all scan work items */ 2452 scsi_flush_work(shost); 2453 2454 /* flush all stgt delete, and rport delete work items, then kill it */ 2455 if (fc_host->work_q) { 2456 work_q = fc_host->work_q; 2457 fc_host->work_q = NULL; 2458 destroy_workqueue(work_q); 2459 } 2460 2461 /* flush all devloss work items, then kill it */ 2462 if (fc_host->devloss_work_q) { 2463 work_q = fc_host->devloss_work_q; 2464 fc_host->devloss_work_q = NULL; 2465 destroy_workqueue(work_q); 2466 } 2467 } 2468 EXPORT_SYMBOL(fc_remove_host); 2469 2470 static void fc_terminate_rport_io(struct fc_rport *rport) 2471 { 2472 struct Scsi_Host *shost = rport_to_shost(rport); 2473 struct fc_internal *i = to_fc_internal(shost->transportt); 2474 2475 /* Involve the LLDD if possible to terminate all io on the rport. */ 2476 if (i->f->terminate_rport_io) 2477 i->f->terminate_rport_io(rport); 2478 2479 /* 2480 * must unblock to flush queued IO. The caller will have set 2481 * the port_state or flags, so that fc_remote_port_chkready will 2482 * fail IO. 2483 */ 2484 scsi_target_unblock(&rport->dev); 2485 } 2486 2487 /** 2488 * fc_starget_delete - called to delete the scsi descendants of an rport 2489 * @work: remote port to be operated on. 2490 * 2491 * Deletes target and all sdevs. 2492 */ 2493 static void 2494 fc_starget_delete(struct work_struct *work) 2495 { 2496 struct fc_rport *rport = 2497 container_of(work, struct fc_rport, stgt_delete_work); 2498 2499 fc_terminate_rport_io(rport); 2500 scsi_remove_target(&rport->dev); 2501 } 2502 2503 2504 /** 2505 * fc_rport_final_delete - finish rport termination and delete it. 2506 * @work: remote port to be deleted. 2507 */ 2508 static void 2509 fc_rport_final_delete(struct work_struct *work) 2510 { 2511 struct fc_rport *rport = 2512 container_of(work, struct fc_rport, rport_delete_work); 2513 struct device *dev = &rport->dev; 2514 struct Scsi_Host *shost = rport_to_shost(rport); 2515 struct fc_internal *i = to_fc_internal(shost->transportt); 2516 unsigned long flags; 2517 int do_callback = 0; 2518 2519 fc_terminate_rport_io(rport); 2520 2521 /* 2522 * if a scan is pending, flush the SCSI Host work_q so that 2523 * that we can reclaim the rport scan work element. 2524 */ 2525 if (rport->flags & FC_RPORT_SCAN_PENDING) 2526 scsi_flush_work(shost); 2527 2528 /* 2529 * Cancel any outstanding timers. These should really exist 2530 * only when rmmod'ing the LLDD and we're asking for 2531 * immediate termination of the rports 2532 */ 2533 spin_lock_irqsave(shost->host_lock, flags); 2534 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2535 spin_unlock_irqrestore(shost->host_lock, flags); 2536 if (!cancel_delayed_work(&rport->fail_io_work)) 2537 fc_flush_devloss(shost); 2538 if (!cancel_delayed_work(&rport->dev_loss_work)) 2539 fc_flush_devloss(shost); 2540 spin_lock_irqsave(shost->host_lock, flags); 2541 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2542 } 2543 spin_unlock_irqrestore(shost->host_lock, flags); 2544 2545 /* Delete SCSI target and sdevs */ 2546 if (rport->scsi_target_id != -1) 2547 fc_starget_delete(&rport->stgt_delete_work); 2548 2549 /* 2550 * Notify the driver that the rport is now dead. The LLDD will 2551 * also guarantee that any communication to the rport is terminated 2552 * 2553 * Avoid this call if we already called it when we preserved the 2554 * rport for the binding. 2555 */ 2556 spin_lock_irqsave(shost->host_lock, flags); 2557 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2558 (i->f->dev_loss_tmo_callbk)) { 2559 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2560 do_callback = 1; 2561 } 2562 spin_unlock_irqrestore(shost->host_lock, flags); 2563 2564 if (do_callback) 2565 i->f->dev_loss_tmo_callbk(rport); 2566 2567 fc_bsg_remove(rport->rqst_q); 2568 2569 transport_remove_device(dev); 2570 device_del(dev); 2571 transport_destroy_device(dev); 2572 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2573 put_device(dev); /* for self-reference */ 2574 } 2575 2576 2577 /** 2578 * fc_rport_create - allocates and creates a remote FC port. 2579 * @shost: scsi host the remote port is connected to. 2580 * @channel: Channel on shost port connected to. 2581 * @ids: The world wide names, fc address, and FC4 port 2582 * roles for the remote port. 2583 * 2584 * Allocates and creates the remoter port structure, including the 2585 * class and sysfs creation. 2586 * 2587 * Notes: 2588 * This routine assumes no locks are held on entry. 2589 */ 2590 static struct fc_rport * 2591 fc_rport_create(struct Scsi_Host *shost, int channel, 2592 struct fc_rport_identifiers *ids) 2593 { 2594 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2595 struct fc_internal *fci = to_fc_internal(shost->transportt); 2596 struct fc_rport *rport; 2597 struct device *dev; 2598 unsigned long flags; 2599 int error; 2600 size_t size; 2601 2602 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2603 rport = kzalloc(size, GFP_KERNEL); 2604 if (unlikely(!rport)) { 2605 printk(KERN_ERR "%s: allocation failure\n", __func__); 2606 return NULL; 2607 } 2608 2609 rport->maxframe_size = -1; 2610 rport->supported_classes = FC_COS_UNSPECIFIED; 2611 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2612 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2613 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2614 rport->port_id = ids->port_id; 2615 rport->roles = ids->roles; 2616 rport->port_state = FC_PORTSTATE_ONLINE; 2617 if (fci->f->dd_fcrport_size) 2618 rport->dd_data = &rport[1]; 2619 rport->channel = channel; 2620 rport->fast_io_fail_tmo = -1; 2621 2622 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2623 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2624 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2625 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2626 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2627 2628 spin_lock_irqsave(shost->host_lock, flags); 2629 2630 rport->number = fc_host->next_rport_number++; 2631 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) 2632 rport->scsi_target_id = fc_host->next_target_id++; 2633 else 2634 rport->scsi_target_id = -1; 2635 list_add_tail(&rport->peers, &fc_host->rports); 2636 get_device(&shost->shost_gendev); /* for fc_host->rport list */ 2637 2638 spin_unlock_irqrestore(shost->host_lock, flags); 2639 2640 dev = &rport->dev; 2641 device_initialize(dev); /* takes self reference */ 2642 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2643 dev->release = fc_rport_dev_release; 2644 dev_set_name(dev, "rport-%d:%d-%d", 2645 shost->host_no, channel, rport->number); 2646 transport_setup_device(dev); 2647 2648 error = device_add(dev); 2649 if (error) { 2650 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2651 goto delete_rport; 2652 } 2653 transport_add_device(dev); 2654 transport_configure_device(dev); 2655 2656 fc_bsg_rportadd(shost, rport); 2657 /* ignore any bsg add error - we just can't do sgio */ 2658 2659 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2660 /* initiate a scan of the target */ 2661 rport->flags |= FC_RPORT_SCAN_PENDING; 2662 scsi_queue_work(shost, &rport->scan_work); 2663 } 2664 2665 return rport; 2666 2667 delete_rport: 2668 transport_destroy_device(dev); 2669 spin_lock_irqsave(shost->host_lock, flags); 2670 list_del(&rport->peers); 2671 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2672 spin_unlock_irqrestore(shost->host_lock, flags); 2673 put_device(dev->parent); 2674 kfree(rport); 2675 return NULL; 2676 } 2677 2678 /** 2679 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2680 * @shost: scsi host the remote port is connected to. 2681 * @channel: Channel on shost port connected to. 2682 * @ids: The world wide names, fc address, and FC4 port 2683 * roles for the remote port. 2684 * 2685 * The LLDD calls this routine to notify the transport of the existence 2686 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2687 * of the port, it's FC address (port_id), and the FC4 roles that are 2688 * active for the port. 2689 * 2690 * For ports that are FCP targets (aka scsi targets), the FC transport 2691 * maintains consistent target id bindings on behalf of the LLDD. 2692 * A consistent target id binding is an assignment of a target id to 2693 * a remote port identifier, which persists while the scsi host is 2694 * attached. The remote port can disappear, then later reappear, and 2695 * it's target id assignment remains the same. This allows for shifts 2696 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2697 * changes to the scsi subsystem which is based on scsi host number and 2698 * target id values. Bindings are only valid during the attachment of 2699 * the scsi host. If the host detaches, then later re-attaches, target 2700 * id bindings may change. 2701 * 2702 * This routine is responsible for returning a remote port structure. 2703 * The routine will search the list of remote ports it maintains 2704 * internally on behalf of consistent target id mappings. If found, the 2705 * remote port structure will be reused. Otherwise, a new remote port 2706 * structure will be allocated. 2707 * 2708 * Whenever a remote port is allocated, a new fc_remote_port class 2709 * device is created. 2710 * 2711 * Should not be called from interrupt context. 2712 * 2713 * Notes: 2714 * This routine assumes no locks are held on entry. 2715 */ 2716 struct fc_rport * 2717 fc_remote_port_add(struct Scsi_Host *shost, int channel, 2718 struct fc_rport_identifiers *ids) 2719 { 2720 struct fc_internal *fci = to_fc_internal(shost->transportt); 2721 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2722 struct fc_rport *rport; 2723 unsigned long flags; 2724 int match = 0; 2725 2726 /* ensure any stgt delete functions are done */ 2727 fc_flush_work(shost); 2728 2729 /* 2730 * Search the list of "active" rports, for an rport that has been 2731 * deleted, but we've held off the real delete while the target 2732 * is in a "blocked" state. 2733 */ 2734 spin_lock_irqsave(shost->host_lock, flags); 2735 2736 list_for_each_entry(rport, &fc_host->rports, peers) { 2737 2738 if ((rport->port_state == FC_PORTSTATE_BLOCKED) && 2739 (rport->channel == channel)) { 2740 2741 switch (fc_host->tgtid_bind_type) { 2742 case FC_TGTID_BIND_BY_WWPN: 2743 case FC_TGTID_BIND_NONE: 2744 if (rport->port_name == ids->port_name) 2745 match = 1; 2746 break; 2747 case FC_TGTID_BIND_BY_WWNN: 2748 if (rport->node_name == ids->node_name) 2749 match = 1; 2750 break; 2751 case FC_TGTID_BIND_BY_ID: 2752 if (rport->port_id == ids->port_id) 2753 match = 1; 2754 break; 2755 } 2756 2757 if (match) { 2758 2759 memcpy(&rport->node_name, &ids->node_name, 2760 sizeof(rport->node_name)); 2761 memcpy(&rport->port_name, &ids->port_name, 2762 sizeof(rport->port_name)); 2763 rport->port_id = ids->port_id; 2764 2765 rport->port_state = FC_PORTSTATE_ONLINE; 2766 rport->roles = ids->roles; 2767 2768 spin_unlock_irqrestore(shost->host_lock, flags); 2769 2770 if (fci->f->dd_fcrport_size) 2771 memset(rport->dd_data, 0, 2772 fci->f->dd_fcrport_size); 2773 2774 /* 2775 * If we were not a target, cancel the 2776 * io terminate and rport timers, and 2777 * we're done. 2778 * 2779 * If we were a target, but our new role 2780 * doesn't indicate a target, leave the 2781 * timers running expecting the role to 2782 * change as the target fully logs in. If 2783 * it doesn't, the target will be torn down. 2784 * 2785 * If we were a target, and our role shows 2786 * we're still a target, cancel the timers 2787 * and kick off a scan. 2788 */ 2789 2790 /* was a target, not in roles */ 2791 if ((rport->scsi_target_id != -1) && 2792 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2793 return rport; 2794 2795 /* 2796 * Stop the fail io and dev_loss timers. 2797 * If they flush, the port_state will 2798 * be checked and will NOOP the function. 2799 */ 2800 if (!cancel_delayed_work(&rport->fail_io_work)) 2801 fc_flush_devloss(shost); 2802 if (!cancel_delayed_work(&rport->dev_loss_work)) 2803 fc_flush_devloss(shost); 2804 2805 spin_lock_irqsave(shost->host_lock, flags); 2806 2807 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2808 FC_RPORT_DEVLOSS_PENDING | 2809 FC_RPORT_DEVLOSS_CALLBK_DONE); 2810 2811 /* if target, initiate a scan */ 2812 if (rport->scsi_target_id != -1) { 2813 rport->flags |= FC_RPORT_SCAN_PENDING; 2814 scsi_queue_work(shost, 2815 &rport->scan_work); 2816 spin_unlock_irqrestore(shost->host_lock, 2817 flags); 2818 scsi_target_unblock(&rport->dev); 2819 } else 2820 spin_unlock_irqrestore(shost->host_lock, 2821 flags); 2822 2823 fc_bsg_goose_queue(rport); 2824 2825 return rport; 2826 } 2827 } 2828 } 2829 2830 /* 2831 * Search the bindings array 2832 * Note: if never a FCP target, you won't be on this list 2833 */ 2834 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2835 2836 /* search for a matching consistent binding */ 2837 2838 list_for_each_entry(rport, &fc_host->rport_bindings, 2839 peers) { 2840 if (rport->channel != channel) 2841 continue; 2842 2843 switch (fc_host->tgtid_bind_type) { 2844 case FC_TGTID_BIND_BY_WWPN: 2845 if (rport->port_name == ids->port_name) 2846 match = 1; 2847 break; 2848 case FC_TGTID_BIND_BY_WWNN: 2849 if (rport->node_name == ids->node_name) 2850 match = 1; 2851 break; 2852 case FC_TGTID_BIND_BY_ID: 2853 if (rport->port_id == ids->port_id) 2854 match = 1; 2855 break; 2856 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2857 break; 2858 } 2859 2860 if (match) { 2861 list_move_tail(&rport->peers, &fc_host->rports); 2862 break; 2863 } 2864 } 2865 2866 if (match) { 2867 memcpy(&rport->node_name, &ids->node_name, 2868 sizeof(rport->node_name)); 2869 memcpy(&rport->port_name, &ids->port_name, 2870 sizeof(rport->port_name)); 2871 rport->port_id = ids->port_id; 2872 rport->roles = ids->roles; 2873 rport->port_state = FC_PORTSTATE_ONLINE; 2874 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2875 2876 if (fci->f->dd_fcrport_size) 2877 memset(rport->dd_data, 0, 2878 fci->f->dd_fcrport_size); 2879 2880 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2881 /* initiate a scan of the target */ 2882 rport->flags |= FC_RPORT_SCAN_PENDING; 2883 scsi_queue_work(shost, &rport->scan_work); 2884 spin_unlock_irqrestore(shost->host_lock, flags); 2885 scsi_target_unblock(&rport->dev); 2886 } else 2887 spin_unlock_irqrestore(shost->host_lock, flags); 2888 2889 return rport; 2890 } 2891 } 2892 2893 spin_unlock_irqrestore(shost->host_lock, flags); 2894 2895 /* No consistent binding found - create new remote port entry */ 2896 rport = fc_rport_create(shost, channel, ids); 2897 2898 return rport; 2899 } 2900 EXPORT_SYMBOL(fc_remote_port_add); 2901 2902 2903 /** 2904 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2905 * @rport: The remote port that no longer exists 2906 * 2907 * The LLDD calls this routine to notify the transport that a remote 2908 * port is no longer part of the topology. Note: Although a port 2909 * may no longer be part of the topology, it may persist in the remote 2910 * ports displayed by the fc_host. We do this under 2 conditions: 2911 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2912 * This allows the port to temporarily disappear, then reappear without 2913 * disrupting the SCSI device tree attached to it. During the "blocked" 2914 * period the port will still exist. 2915 * 2) If the port was a scsi target and disappears for longer than we 2916 * expect, we'll delete the port and the tear down the SCSI device tree 2917 * attached to it. However, we want to semi-persist the target id assigned 2918 * to that port if it eventually does exist. The port structure will 2919 * remain (although with minimal information) so that the target id 2920 * bindings remails. 2921 * 2922 * If the remote port is not an FCP Target, it will be fully torn down 2923 * and deallocated, including the fc_remote_port class device. 2924 * 2925 * If the remote port is an FCP Target, the port will be placed in a 2926 * temporary blocked state. From the LLDD's perspective, the rport no 2927 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2928 * exists, but all sdevs on it are blocked from further I/O. The following 2929 * is then expected. 2930 * 2931 * If the remote port does not return (signaled by a LLDD call to 2932 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2933 * scsi target is removed - killing all outstanding i/o and removing the 2934 * scsi devices attached ot it. The port structure will be marked Not 2935 * Present and be partially cleared, leaving only enough information to 2936 * recognize the remote port relative to the scsi target id binding if 2937 * it later appears. The port will remain as long as there is a valid 2938 * binding (e.g. until the user changes the binding type or unloads the 2939 * scsi host with the binding). 2940 * 2941 * If the remote port returns within the dev_loss_tmo value (and matches 2942 * according to the target id binding type), the port structure will be 2943 * reused. If it is no longer a SCSI target, the target will be torn 2944 * down. If it continues to be a SCSI target, then the target will be 2945 * unblocked (allowing i/o to be resumed), and a scan will be activated 2946 * to ensure that all luns are detected. 2947 * 2948 * Called from normal process context only - cannot be called from interrupt. 2949 * 2950 * Notes: 2951 * This routine assumes no locks are held on entry. 2952 */ 2953 void 2954 fc_remote_port_delete(struct fc_rport *rport) 2955 { 2956 struct Scsi_Host *shost = rport_to_shost(rport); 2957 unsigned long timeout = rport->dev_loss_tmo; 2958 unsigned long flags; 2959 2960 /* 2961 * No need to flush the fc_host work_q's, as all adds are synchronous. 2962 * 2963 * We do need to reclaim the rport scan work element, so eventually 2964 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2965 * there's still a scan pending. 2966 */ 2967 2968 spin_lock_irqsave(shost->host_lock, flags); 2969 2970 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2971 spin_unlock_irqrestore(shost->host_lock, flags); 2972 return; 2973 } 2974 2975 /* 2976 * In the past, we if this was not an FCP-Target, we would 2977 * unconditionally just jump to deleting the rport. 2978 * However, rports can be used as node containers by the LLDD, 2979 * and its not appropriate to just terminate the rport at the 2980 * first sign of a loss in connectivity. The LLDD may want to 2981 * send ELS traffic to re-validate the login. If the rport is 2982 * immediately deleted, it makes it inappropriate for a node 2983 * container. 2984 * So... we now unconditionally wait dev_loss_tmo before 2985 * destroying an rport. 2986 */ 2987 2988 rport->port_state = FC_PORTSTATE_BLOCKED; 2989 2990 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 2991 2992 spin_unlock_irqrestore(shost->host_lock, flags); 2993 2994 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && 2995 shost->active_mode & MODE_TARGET) 2996 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); 2997 2998 scsi_target_block(&rport->dev); 2999 3000 /* see if we need to kill io faster than waiting for device loss */ 3001 if ((rport->fast_io_fail_tmo != -1) && 3002 (rport->fast_io_fail_tmo < timeout)) 3003 fc_queue_devloss_work(shost, &rport->fail_io_work, 3004 rport->fast_io_fail_tmo * HZ); 3005 3006 /* cap the length the devices can be blocked until they are deleted */ 3007 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3008 } 3009 EXPORT_SYMBOL(fc_remote_port_delete); 3010 3011 /** 3012 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3013 * @rport: The remote port that changed. 3014 * @roles: New roles for this port. 3015 * 3016 * Description: The LLDD calls this routine to notify the transport that the 3017 * roles on a remote port may have changed. The largest effect of this is 3018 * if a port now becomes a FCP Target, it must be allocated a 3019 * scsi target id. If the port is no longer a FCP target, any 3020 * scsi target id value assigned to it will persist in case the 3021 * role changes back to include FCP Target. No changes in the scsi 3022 * midlayer will be invoked if the role changes (in the expectation 3023 * that the role will be resumed. If it doesn't normal error processing 3024 * will take place). 3025 * 3026 * Should not be called from interrupt context. 3027 * 3028 * Notes: 3029 * This routine assumes no locks are held on entry. 3030 */ 3031 void 3032 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3033 { 3034 struct Scsi_Host *shost = rport_to_shost(rport); 3035 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3036 unsigned long flags; 3037 int create = 0; 3038 int ret; 3039 3040 spin_lock_irqsave(shost->host_lock, flags); 3041 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3042 if (rport->scsi_target_id == -1) { 3043 rport->scsi_target_id = fc_host->next_target_id++; 3044 create = 1; 3045 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3046 create = 1; 3047 } else if (shost->active_mode & MODE_TARGET) { 3048 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, 3049 (char *)&rport->node_name); 3050 if (ret) 3051 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", 3052 ret); 3053 } 3054 3055 rport->roles = roles; 3056 3057 spin_unlock_irqrestore(shost->host_lock, flags); 3058 3059 if (create) { 3060 /* 3061 * There may have been a delete timer running on the 3062 * port. Ensure that it is cancelled as we now know 3063 * the port is an FCP Target. 3064 * Note: we know the rport is exists and in an online 3065 * state as the LLDD would not have had an rport 3066 * reference to pass us. 3067 * 3068 * Take no action on the del_timer failure as the state 3069 * machine state change will validate the 3070 * transaction. 3071 */ 3072 if (!cancel_delayed_work(&rport->fail_io_work)) 3073 fc_flush_devloss(shost); 3074 if (!cancel_delayed_work(&rport->dev_loss_work)) 3075 fc_flush_devloss(shost); 3076 3077 spin_lock_irqsave(shost->host_lock, flags); 3078 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3079 FC_RPORT_DEVLOSS_PENDING | 3080 FC_RPORT_DEVLOSS_CALLBK_DONE); 3081 spin_unlock_irqrestore(shost->host_lock, flags); 3082 3083 /* ensure any stgt delete functions are done */ 3084 fc_flush_work(shost); 3085 3086 /* initiate a scan of the target */ 3087 spin_lock_irqsave(shost->host_lock, flags); 3088 rport->flags |= FC_RPORT_SCAN_PENDING; 3089 scsi_queue_work(shost, &rport->scan_work); 3090 spin_unlock_irqrestore(shost->host_lock, flags); 3091 scsi_target_unblock(&rport->dev); 3092 } 3093 } 3094 EXPORT_SYMBOL(fc_remote_port_rolechg); 3095 3096 /** 3097 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3098 * @work: rport target that failed to reappear in the allotted time. 3099 * 3100 * Description: An attempt to delete a remote port blocks, and if it fails 3101 * to return in the allotted time this gets called. 3102 */ 3103 static void 3104 fc_timeout_deleted_rport(struct work_struct *work) 3105 { 3106 struct fc_rport *rport = 3107 container_of(work, struct fc_rport, dev_loss_work.work); 3108 struct Scsi_Host *shost = rport_to_shost(rport); 3109 struct fc_internal *i = to_fc_internal(shost->transportt); 3110 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3111 unsigned long flags; 3112 int do_callback = 0; 3113 3114 spin_lock_irqsave(shost->host_lock, flags); 3115 3116 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3117 3118 /* 3119 * If the port is ONLINE, then it came back. If it was a SCSI 3120 * target, validate it still is. If not, tear down the 3121 * scsi_target on it. 3122 */ 3123 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3124 (rport->scsi_target_id != -1) && 3125 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3126 dev_printk(KERN_ERR, &rport->dev, 3127 "blocked FC remote port time out: no longer" 3128 " a FCP target, removing starget\n"); 3129 spin_unlock_irqrestore(shost->host_lock, flags); 3130 scsi_target_unblock(&rport->dev); 3131 fc_queue_work(shost, &rport->stgt_delete_work); 3132 return; 3133 } 3134 3135 /* NOOP state - we're flushing workq's */ 3136 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3137 spin_unlock_irqrestore(shost->host_lock, flags); 3138 dev_printk(KERN_ERR, &rport->dev, 3139 "blocked FC remote port time out: leaving" 3140 " rport%s alone\n", 3141 (rport->scsi_target_id != -1) ? " and starget" : ""); 3142 return; 3143 } 3144 3145 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3146 (rport->scsi_target_id == -1)) { 3147 list_del(&rport->peers); 3148 rport->port_state = FC_PORTSTATE_DELETED; 3149 dev_printk(KERN_ERR, &rport->dev, 3150 "blocked FC remote port time out: removing" 3151 " rport%s\n", 3152 (rport->scsi_target_id != -1) ? " and starget" : ""); 3153 fc_queue_work(shost, &rport->rport_delete_work); 3154 spin_unlock_irqrestore(shost->host_lock, flags); 3155 return; 3156 } 3157 3158 dev_printk(KERN_ERR, &rport->dev, 3159 "blocked FC remote port time out: removing target and " 3160 "saving binding\n"); 3161 3162 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3163 3164 /* 3165 * Note: We do not remove or clear the hostdata area. This allows 3166 * host-specific target data to persist along with the 3167 * scsi_target_id. It's up to the host to manage it's hostdata area. 3168 */ 3169 3170 /* 3171 * Reinitialize port attributes that may change if the port comes back. 3172 */ 3173 rport->maxframe_size = -1; 3174 rport->supported_classes = FC_COS_UNSPECIFIED; 3175 rport->roles = FC_PORT_ROLE_UNKNOWN; 3176 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3177 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3178 3179 /* 3180 * Pre-emptively kill I/O rather than waiting for the work queue 3181 * item to teardown the starget. (FCOE libFC folks prefer this 3182 * and to have the rport_port_id still set when it's done). 3183 */ 3184 spin_unlock_irqrestore(shost->host_lock, flags); 3185 fc_terminate_rport_io(rport); 3186 3187 spin_lock_irqsave(shost->host_lock, flags); 3188 3189 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3190 3191 /* remove the identifiers that aren't used in the consisting binding */ 3192 switch (fc_host->tgtid_bind_type) { 3193 case FC_TGTID_BIND_BY_WWPN: 3194 rport->node_name = -1; 3195 rport->port_id = -1; 3196 break; 3197 case FC_TGTID_BIND_BY_WWNN: 3198 rport->port_name = -1; 3199 rport->port_id = -1; 3200 break; 3201 case FC_TGTID_BIND_BY_ID: 3202 rport->node_name = -1; 3203 rport->port_name = -1; 3204 break; 3205 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3206 break; 3207 } 3208 3209 /* 3210 * As this only occurs if the remote port (scsi target) 3211 * went away and didn't come back - we'll remove 3212 * all attached scsi devices. 3213 */ 3214 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3215 fc_queue_work(shost, &rport->stgt_delete_work); 3216 3217 do_callback = 1; 3218 } 3219 3220 spin_unlock_irqrestore(shost->host_lock, flags); 3221 3222 /* 3223 * Notify the driver that the rport is now dead. The LLDD will 3224 * also guarantee that any communication to the rport is terminated 3225 * 3226 * Note: we set the CALLBK_DONE flag above to correspond 3227 */ 3228 if (do_callback && i->f->dev_loss_tmo_callbk) 3229 i->f->dev_loss_tmo_callbk(rport); 3230 } 3231 3232 3233 /** 3234 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3235 * @work: rport to terminate io on. 3236 * 3237 * Notes: Only requests the failure of the io, not that all are flushed 3238 * prior to returning. 3239 */ 3240 static void 3241 fc_timeout_fail_rport_io(struct work_struct *work) 3242 { 3243 struct fc_rport *rport = 3244 container_of(work, struct fc_rport, fail_io_work.work); 3245 3246 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3247 return; 3248 3249 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3250 fc_terminate_rport_io(rport); 3251 } 3252 3253 /** 3254 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3255 * @work: remote port to be scanned. 3256 */ 3257 static void 3258 fc_scsi_scan_rport(struct work_struct *work) 3259 { 3260 struct fc_rport *rport = 3261 container_of(work, struct fc_rport, scan_work); 3262 struct Scsi_Host *shost = rport_to_shost(rport); 3263 struct fc_internal *i = to_fc_internal(shost->transportt); 3264 unsigned long flags; 3265 3266 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3267 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3268 !(i->f->disable_target_scan)) { 3269 scsi_scan_target(&rport->dev, rport->channel, 3270 rport->scsi_target_id, SCAN_WILD_CARD, 1); 3271 } 3272 3273 spin_lock_irqsave(shost->host_lock, flags); 3274 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3275 spin_unlock_irqrestore(shost->host_lock, flags); 3276 } 3277 3278 /** 3279 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3280 * @cmnd: SCSI command that scsi_eh is trying to recover 3281 * 3282 * This routine can be called from a FC LLD scsi_eh callback. It 3283 * blocks the scsi_eh thread until the fc_rport leaves the 3284 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3285 * necessary to avoid the scsi_eh failing recovery actions for blocked 3286 * rports which would lead to offlined SCSI devices. 3287 * 3288 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3289 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3290 * passed back to scsi_eh. 3291 */ 3292 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3293 { 3294 struct Scsi_Host *shost = cmnd->device->host; 3295 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3296 unsigned long flags; 3297 3298 spin_lock_irqsave(shost->host_lock, flags); 3299 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3300 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3301 spin_unlock_irqrestore(shost->host_lock, flags); 3302 msleep(1000); 3303 spin_lock_irqsave(shost->host_lock, flags); 3304 } 3305 spin_unlock_irqrestore(shost->host_lock, flags); 3306 3307 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3308 return FAST_IO_FAIL; 3309 3310 return 0; 3311 } 3312 EXPORT_SYMBOL(fc_block_scsi_eh); 3313 3314 /** 3315 * fc_vport_setup - allocates and creates a FC virtual port. 3316 * @shost: scsi host the virtual port is connected to. 3317 * @channel: Channel on shost port connected to. 3318 * @pdev: parent device for vport 3319 * @ids: The world wide names, FC4 port roles, etc for 3320 * the virtual port. 3321 * @ret_vport: The pointer to the created vport. 3322 * 3323 * Allocates and creates the vport structure, calls the parent host 3324 * to instantiate the vport, the completes w/ class and sysfs creation. 3325 * 3326 * Notes: 3327 * This routine assumes no locks are held on entry. 3328 */ 3329 static int 3330 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3331 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3332 { 3333 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3334 struct fc_internal *fci = to_fc_internal(shost->transportt); 3335 struct fc_vport *vport; 3336 struct device *dev; 3337 unsigned long flags; 3338 size_t size; 3339 int error; 3340 3341 *ret_vport = NULL; 3342 3343 if ( ! fci->f->vport_create) 3344 return -ENOENT; 3345 3346 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3347 vport = kzalloc(size, GFP_KERNEL); 3348 if (unlikely(!vport)) { 3349 printk(KERN_ERR "%s: allocation failure\n", __func__); 3350 return -ENOMEM; 3351 } 3352 3353 vport->vport_state = FC_VPORT_UNKNOWN; 3354 vport->vport_last_state = FC_VPORT_UNKNOWN; 3355 vport->node_name = ids->node_name; 3356 vport->port_name = ids->port_name; 3357 vport->roles = ids->roles; 3358 vport->vport_type = ids->vport_type; 3359 if (fci->f->dd_fcvport_size) 3360 vport->dd_data = &vport[1]; 3361 vport->shost = shost; 3362 vport->channel = channel; 3363 vport->flags = FC_VPORT_CREATING; 3364 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3365 3366 spin_lock_irqsave(shost->host_lock, flags); 3367 3368 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3369 spin_unlock_irqrestore(shost->host_lock, flags); 3370 kfree(vport); 3371 return -ENOSPC; 3372 } 3373 fc_host->npiv_vports_inuse++; 3374 vport->number = fc_host->next_vport_number++; 3375 list_add_tail(&vport->peers, &fc_host->vports); 3376 get_device(&shost->shost_gendev); /* for fc_host->vport list */ 3377 3378 spin_unlock_irqrestore(shost->host_lock, flags); 3379 3380 dev = &vport->dev; 3381 device_initialize(dev); /* takes self reference */ 3382 dev->parent = get_device(pdev); /* takes parent reference */ 3383 dev->release = fc_vport_dev_release; 3384 dev_set_name(dev, "vport-%d:%d-%d", 3385 shost->host_no, channel, vport->number); 3386 transport_setup_device(dev); 3387 3388 error = device_add(dev); 3389 if (error) { 3390 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3391 goto delete_vport; 3392 } 3393 transport_add_device(dev); 3394 transport_configure_device(dev); 3395 3396 error = fci->f->vport_create(vport, ids->disable); 3397 if (error) { 3398 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3399 goto delete_vport_all; 3400 } 3401 3402 /* 3403 * if the parent isn't the physical adapter's Scsi_Host, ensure 3404 * the Scsi_Host at least contains ia symlink to the vport. 3405 */ 3406 if (pdev != &shost->shost_gendev) { 3407 error = sysfs_create_link(&shost->shost_gendev.kobj, 3408 &dev->kobj, dev_name(dev)); 3409 if (error) 3410 printk(KERN_ERR 3411 "%s: Cannot create vport symlinks for " 3412 "%s, err=%d\n", 3413 __func__, dev_name(dev), error); 3414 } 3415 spin_lock_irqsave(shost->host_lock, flags); 3416 vport->flags &= ~FC_VPORT_CREATING; 3417 spin_unlock_irqrestore(shost->host_lock, flags); 3418 3419 dev_printk(KERN_NOTICE, pdev, 3420 "%s created via shost%d channel %d\n", dev_name(dev), 3421 shost->host_no, channel); 3422 3423 *ret_vport = vport; 3424 3425 return 0; 3426 3427 delete_vport_all: 3428 transport_remove_device(dev); 3429 device_del(dev); 3430 delete_vport: 3431 transport_destroy_device(dev); 3432 spin_lock_irqsave(shost->host_lock, flags); 3433 list_del(&vport->peers); 3434 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3435 fc_host->npiv_vports_inuse--; 3436 spin_unlock_irqrestore(shost->host_lock, flags); 3437 put_device(dev->parent); 3438 kfree(vport); 3439 3440 return error; 3441 } 3442 3443 /** 3444 * fc_vport_create - Admin App or LLDD requests creation of a vport 3445 * @shost: scsi host the virtual port is connected to. 3446 * @channel: channel on shost port connected to. 3447 * @ids: The world wide names, FC4 port roles, etc for 3448 * the virtual port. 3449 * 3450 * Notes: 3451 * This routine assumes no locks are held on entry. 3452 */ 3453 struct fc_vport * 3454 fc_vport_create(struct Scsi_Host *shost, int channel, 3455 struct fc_vport_identifiers *ids) 3456 { 3457 int stat; 3458 struct fc_vport *vport; 3459 3460 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3461 ids, &vport); 3462 return stat ? NULL : vport; 3463 } 3464 EXPORT_SYMBOL(fc_vport_create); 3465 3466 /** 3467 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3468 * @vport: fc_vport to be terminated 3469 * 3470 * Calls the LLDD vport_delete() function, then deallocates and removes 3471 * the vport from the shost and object tree. 3472 * 3473 * Notes: 3474 * This routine assumes no locks are held on entry. 3475 */ 3476 int 3477 fc_vport_terminate(struct fc_vport *vport) 3478 { 3479 struct Scsi_Host *shost = vport_to_shost(vport); 3480 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3481 struct fc_internal *i = to_fc_internal(shost->transportt); 3482 struct device *dev = &vport->dev; 3483 unsigned long flags; 3484 int stat; 3485 3486 if (i->f->vport_delete) 3487 stat = i->f->vport_delete(vport); 3488 else 3489 stat = -ENOENT; 3490 3491 spin_lock_irqsave(shost->host_lock, flags); 3492 vport->flags &= ~FC_VPORT_DELETING; 3493 if (!stat) { 3494 vport->flags |= FC_VPORT_DELETED; 3495 list_del(&vport->peers); 3496 fc_host->npiv_vports_inuse--; 3497 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3498 } 3499 spin_unlock_irqrestore(shost->host_lock, flags); 3500 3501 if (stat) 3502 return stat; 3503 3504 if (dev->parent != &shost->shost_gendev) 3505 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3506 transport_remove_device(dev); 3507 device_del(dev); 3508 transport_destroy_device(dev); 3509 3510 /* 3511 * Removing our self-reference should mean our 3512 * release function gets called, which will drop the remaining 3513 * parent reference and free the data structure. 3514 */ 3515 put_device(dev); /* for self-reference */ 3516 3517 return 0; /* SUCCESS */ 3518 } 3519 EXPORT_SYMBOL(fc_vport_terminate); 3520 3521 /** 3522 * fc_vport_sched_delete - workq-based delete request for a vport 3523 * @work: vport to be deleted. 3524 */ 3525 static void 3526 fc_vport_sched_delete(struct work_struct *work) 3527 { 3528 struct fc_vport *vport = 3529 container_of(work, struct fc_vport, vport_delete_work); 3530 int stat; 3531 3532 stat = fc_vport_terminate(vport); 3533 if (stat) 3534 dev_printk(KERN_ERR, vport->dev.parent, 3535 "%s: %s could not be deleted created via " 3536 "shost%d channel %d - error %d\n", __func__, 3537 dev_name(&vport->dev), vport->shost->host_no, 3538 vport->channel, stat); 3539 } 3540 3541 3542 /* 3543 * BSG support 3544 */ 3545 3546 3547 /** 3548 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job 3549 * @job: fc_bsg_job that is to be torn down 3550 */ 3551 static void 3552 fc_destroy_bsgjob(struct fc_bsg_job *job) 3553 { 3554 unsigned long flags; 3555 3556 spin_lock_irqsave(&job->job_lock, flags); 3557 if (job->ref_cnt) { 3558 spin_unlock_irqrestore(&job->job_lock, flags); 3559 return; 3560 } 3561 spin_unlock_irqrestore(&job->job_lock, flags); 3562 3563 put_device(job->dev); /* release reference for the request */ 3564 3565 kfree(job->request_payload.sg_list); 3566 kfree(job->reply_payload.sg_list); 3567 kfree(job); 3568 } 3569 3570 /** 3571 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has 3572 * completed 3573 * @job: fc_bsg_job that is complete 3574 */ 3575 static void 3576 fc_bsg_jobdone(struct fc_bsg_job *job) 3577 { 3578 struct request *req = job->req; 3579 struct request *rsp = req->next_rq; 3580 int err; 3581 3582 err = job->req->errors = job->reply->result; 3583 3584 if (err < 0) 3585 /* we're only returning the result field in the reply */ 3586 job->req->sense_len = sizeof(uint32_t); 3587 else 3588 job->req->sense_len = job->reply_len; 3589 3590 /* we assume all request payload was transferred, residual == 0 */ 3591 req->resid_len = 0; 3592 3593 if (rsp) { 3594 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); 3595 3596 /* set reply (bidi) residual */ 3597 rsp->resid_len -= min(job->reply->reply_payload_rcv_len, 3598 rsp->resid_len); 3599 } 3600 blk_complete_request(req); 3601 } 3602 3603 /** 3604 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests 3605 * @rq: BSG request that holds the job to be destroyed 3606 */ 3607 static void fc_bsg_softirq_done(struct request *rq) 3608 { 3609 struct fc_bsg_job *job = rq->special; 3610 unsigned long flags; 3611 3612 spin_lock_irqsave(&job->job_lock, flags); 3613 job->state_flags |= FC_RQST_STATE_DONE; 3614 job->ref_cnt--; 3615 spin_unlock_irqrestore(&job->job_lock, flags); 3616 3617 blk_end_request_all(rq, rq->errors); 3618 fc_destroy_bsgjob(job); 3619 } 3620 3621 /** 3622 * fc_bsg_job_timeout - handler for when a bsg request timesout 3623 * @req: request that timed out 3624 */ 3625 static enum blk_eh_timer_return 3626 fc_bsg_job_timeout(struct request *req) 3627 { 3628 struct fc_bsg_job *job = (void *) req->special; 3629 struct Scsi_Host *shost = job->shost; 3630 struct fc_internal *i = to_fc_internal(shost->transportt); 3631 unsigned long flags; 3632 int err = 0, done = 0; 3633 3634 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) 3635 return BLK_EH_RESET_TIMER; 3636 3637 spin_lock_irqsave(&job->job_lock, flags); 3638 if (job->state_flags & FC_RQST_STATE_DONE) 3639 done = 1; 3640 else 3641 job->ref_cnt++; 3642 spin_unlock_irqrestore(&job->job_lock, flags); 3643 3644 if (!done && i->f->bsg_timeout) { 3645 /* call LLDD to abort the i/o as it has timed out */ 3646 err = i->f->bsg_timeout(job); 3647 if (err == -EAGAIN) { 3648 job->ref_cnt--; 3649 return BLK_EH_RESET_TIMER; 3650 } else if (err) 3651 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3652 "abort failed with status %d\n", err); 3653 } 3654 3655 /* the blk_end_sync_io() doesn't check the error */ 3656 if (done) 3657 return BLK_EH_NOT_HANDLED; 3658 else 3659 return BLK_EH_HANDLED; 3660 } 3661 3662 static int 3663 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) 3664 { 3665 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); 3666 3667 BUG_ON(!req->nr_phys_segments); 3668 3669 buf->sg_list = kzalloc(sz, GFP_KERNEL); 3670 if (!buf->sg_list) 3671 return -ENOMEM; 3672 sg_init_table(buf->sg_list, req->nr_phys_segments); 3673 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); 3674 buf->payload_len = blk_rq_bytes(req); 3675 return 0; 3676 } 3677 3678 3679 /** 3680 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the 3681 * bsg request 3682 * @shost: SCSI Host corresponding to the bsg object 3683 * @rport: (optional) FC Remote Port corresponding to the bsg object 3684 * @req: BSG request that needs a job structure 3685 */ 3686 static int 3687 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, 3688 struct request *req) 3689 { 3690 struct fc_internal *i = to_fc_internal(shost->transportt); 3691 struct request *rsp = req->next_rq; 3692 struct fc_bsg_job *job; 3693 int ret; 3694 3695 BUG_ON(req->special); 3696 3697 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, 3698 GFP_KERNEL); 3699 if (!job) 3700 return -ENOMEM; 3701 3702 /* 3703 * Note: this is a bit silly. 3704 * The request gets formatted as a SGIO v4 ioctl request, which 3705 * then gets reformatted as a blk request, which then gets 3706 * reformatted as a fc bsg request. And on completion, we have 3707 * to wrap return results such that SGIO v4 thinks it was a scsi 3708 * status. I hope this was all worth it. 3709 */ 3710 3711 req->special = job; 3712 job->shost = shost; 3713 job->rport = rport; 3714 job->req = req; 3715 if (i->f->dd_bsg_size) 3716 job->dd_data = (void *)&job[1]; 3717 spin_lock_init(&job->job_lock); 3718 job->request = (struct fc_bsg_request *)req->cmd; 3719 job->request_len = req->cmd_len; 3720 job->reply = req->sense; 3721 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer 3722 * allocated */ 3723 if (req->bio) { 3724 ret = fc_bsg_map_buffer(&job->request_payload, req); 3725 if (ret) 3726 goto failjob_rls_job; 3727 } 3728 if (rsp && rsp->bio) { 3729 ret = fc_bsg_map_buffer(&job->reply_payload, rsp); 3730 if (ret) 3731 goto failjob_rls_rqst_payload; 3732 } 3733 job->job_done = fc_bsg_jobdone; 3734 if (rport) 3735 job->dev = &rport->dev; 3736 else 3737 job->dev = &shost->shost_gendev; 3738 get_device(job->dev); /* take a reference for the request */ 3739 3740 job->ref_cnt = 1; 3741 3742 return 0; 3743 3744 3745 failjob_rls_rqst_payload: 3746 kfree(job->request_payload.sg_list); 3747 failjob_rls_job: 3748 kfree(job); 3749 return -ENOMEM; 3750 } 3751 3752 3753 enum fc_dispatch_result { 3754 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ 3755 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ 3756 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ 3757 }; 3758 3759 3760 /** 3761 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3762 * @q: fc host request queue 3763 * @shost: scsi host rport attached to 3764 * @job: bsg job to be processed 3765 */ 3766 static enum fc_dispatch_result 3767 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3768 struct fc_bsg_job *job) 3769 { 3770 struct fc_internal *i = to_fc_internal(shost->transportt); 3771 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3772 int ret; 3773 3774 /* Validate the host command */ 3775 switch (job->request->msgcode) { 3776 case FC_BSG_HST_ADD_RPORT: 3777 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3778 break; 3779 3780 case FC_BSG_HST_DEL_RPORT: 3781 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3782 break; 3783 3784 case FC_BSG_HST_ELS_NOLOGIN: 3785 cmdlen += sizeof(struct fc_bsg_host_els); 3786 /* there better be a xmt and rcv payloads */ 3787 if ((!job->request_payload.payload_len) || 3788 (!job->reply_payload.payload_len)) { 3789 ret = -EINVAL; 3790 goto fail_host_msg; 3791 } 3792 break; 3793 3794 case FC_BSG_HST_CT: 3795 cmdlen += sizeof(struct fc_bsg_host_ct); 3796 /* there better be xmt and rcv payloads */ 3797 if ((!job->request_payload.payload_len) || 3798 (!job->reply_payload.payload_len)) { 3799 ret = -EINVAL; 3800 goto fail_host_msg; 3801 } 3802 break; 3803 3804 case FC_BSG_HST_VENDOR: 3805 cmdlen += sizeof(struct fc_bsg_host_vendor); 3806 if ((shost->hostt->vendor_id == 0L) || 3807 (job->request->rqst_data.h_vendor.vendor_id != 3808 shost->hostt->vendor_id)) { 3809 ret = -ESRCH; 3810 goto fail_host_msg; 3811 } 3812 break; 3813 3814 default: 3815 ret = -EBADR; 3816 goto fail_host_msg; 3817 } 3818 3819 /* check if we really have all the request data needed */ 3820 if (job->request_len < cmdlen) { 3821 ret = -ENOMSG; 3822 goto fail_host_msg; 3823 } 3824 3825 ret = i->f->bsg_request(job); 3826 if (!ret) 3827 return FC_DISPATCH_UNLOCKED; 3828 3829 fail_host_msg: 3830 /* return the errno failure code as the only status */ 3831 BUG_ON(job->reply_len < sizeof(uint32_t)); 3832 job->reply->reply_payload_rcv_len = 0; 3833 job->reply->result = ret; 3834 job->reply_len = sizeof(uint32_t); 3835 fc_bsg_jobdone(job); 3836 return FC_DISPATCH_UNLOCKED; 3837 } 3838 3839 3840 /* 3841 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3842 * @rport: rport to be restarted 3843 */ 3844 static void 3845 fc_bsg_goose_queue(struct fc_rport *rport) 3846 { 3847 if (!rport->rqst_q) 3848 return; 3849 3850 /* 3851 * This get/put dance makes no sense 3852 */ 3853 get_device(&rport->dev); 3854 blk_run_queue_async(rport->rqst_q); 3855 put_device(&rport->dev); 3856 } 3857 3858 /** 3859 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3860 * @q: rport request queue 3861 * @shost: scsi host rport attached to 3862 * @rport: rport request destined to 3863 * @job: bsg job to be processed 3864 */ 3865 static enum fc_dispatch_result 3866 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3867 struct fc_rport *rport, struct fc_bsg_job *job) 3868 { 3869 struct fc_internal *i = to_fc_internal(shost->transportt); 3870 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3871 int ret; 3872 3873 /* Validate the rport command */ 3874 switch (job->request->msgcode) { 3875 case FC_BSG_RPT_ELS: 3876 cmdlen += sizeof(struct fc_bsg_rport_els); 3877 goto check_bidi; 3878 3879 case FC_BSG_RPT_CT: 3880 cmdlen += sizeof(struct fc_bsg_rport_ct); 3881 check_bidi: 3882 /* there better be xmt and rcv payloads */ 3883 if ((!job->request_payload.payload_len) || 3884 (!job->reply_payload.payload_len)) { 3885 ret = -EINVAL; 3886 goto fail_rport_msg; 3887 } 3888 break; 3889 default: 3890 ret = -EBADR; 3891 goto fail_rport_msg; 3892 } 3893 3894 /* check if we really have all the request data needed */ 3895 if (job->request_len < cmdlen) { 3896 ret = -ENOMSG; 3897 goto fail_rport_msg; 3898 } 3899 3900 ret = i->f->bsg_request(job); 3901 if (!ret) 3902 return FC_DISPATCH_UNLOCKED; 3903 3904 fail_rport_msg: 3905 /* return the errno failure code as the only status */ 3906 BUG_ON(job->reply_len < sizeof(uint32_t)); 3907 job->reply->reply_payload_rcv_len = 0; 3908 job->reply->result = ret; 3909 job->reply_len = sizeof(uint32_t); 3910 fc_bsg_jobdone(job); 3911 return FC_DISPATCH_UNLOCKED; 3912 } 3913 3914 3915 /** 3916 * fc_bsg_request_handler - generic handler for bsg requests 3917 * @q: request queue to manage 3918 * @shost: Scsi_Host related to the bsg object 3919 * @rport: FC remote port related to the bsg object (optional) 3920 * @dev: device structure for bsg object 3921 */ 3922 static void 3923 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, 3924 struct fc_rport *rport, struct device *dev) 3925 { 3926 struct request *req; 3927 struct fc_bsg_job *job; 3928 enum fc_dispatch_result ret; 3929 3930 if (!get_device(dev)) 3931 return; 3932 3933 while (1) { 3934 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && 3935 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3936 break; 3937 3938 req = blk_fetch_request(q); 3939 if (!req) 3940 break; 3941 3942 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { 3943 req->errors = -ENXIO; 3944 spin_unlock_irq(q->queue_lock); 3945 blk_end_request_all(req, -ENXIO); 3946 spin_lock_irq(q->queue_lock); 3947 continue; 3948 } 3949 3950 spin_unlock_irq(q->queue_lock); 3951 3952 ret = fc_req_to_bsgjob(shost, rport, req); 3953 if (ret) { 3954 req->errors = ret; 3955 blk_end_request_all(req, ret); 3956 spin_lock_irq(q->queue_lock); 3957 continue; 3958 } 3959 3960 job = req->special; 3961 3962 /* check if we have the msgcode value at least */ 3963 if (job->request_len < sizeof(uint32_t)) { 3964 BUG_ON(job->reply_len < sizeof(uint32_t)); 3965 job->reply->reply_payload_rcv_len = 0; 3966 job->reply->result = -ENOMSG; 3967 job->reply_len = sizeof(uint32_t); 3968 fc_bsg_jobdone(job); 3969 spin_lock_irq(q->queue_lock); 3970 continue; 3971 } 3972 3973 /* the dispatch routines will unlock the queue_lock */ 3974 if (rport) 3975 ret = fc_bsg_rport_dispatch(q, shost, rport, job); 3976 else 3977 ret = fc_bsg_host_dispatch(q, shost, job); 3978 3979 /* did dispatcher hit state that can't process any more */ 3980 if (ret == FC_DISPATCH_BREAK) 3981 break; 3982 3983 /* did dispatcher had released the lock */ 3984 if (ret == FC_DISPATCH_UNLOCKED) 3985 spin_lock_irq(q->queue_lock); 3986 } 3987 3988 spin_unlock_irq(q->queue_lock); 3989 put_device(dev); 3990 spin_lock_irq(q->queue_lock); 3991 } 3992 3993 3994 /** 3995 * fc_bsg_host_handler - handler for bsg requests for a fc host 3996 * @q: fc host request queue 3997 */ 3998 static void 3999 fc_bsg_host_handler(struct request_queue *q) 4000 { 4001 struct Scsi_Host *shost = q->queuedata; 4002 4003 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); 4004 } 4005 4006 4007 /** 4008 * fc_bsg_rport_handler - handler for bsg requests for a fc rport 4009 * @q: rport request queue 4010 */ 4011 static void 4012 fc_bsg_rport_handler(struct request_queue *q) 4013 { 4014 struct fc_rport *rport = q->queuedata; 4015 struct Scsi_Host *shost = rport_to_shost(rport); 4016 4017 fc_bsg_request_handler(q, shost, rport, &rport->dev); 4018 } 4019 4020 4021 /** 4022 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4023 * @shost: shost for fc_host 4024 * @fc_host: fc_host adding the structures to 4025 */ 4026 static int 4027 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4028 { 4029 struct device *dev = &shost->shost_gendev; 4030 struct fc_internal *i = to_fc_internal(shost->transportt); 4031 struct request_queue *q; 4032 int err; 4033 char bsg_name[20]; 4034 4035 fc_host->rqst_q = NULL; 4036 4037 if (!i->f->bsg_request) 4038 return -ENOTSUPP; 4039 4040 snprintf(bsg_name, sizeof(bsg_name), 4041 "fc_host%d", shost->host_no); 4042 4043 q = __scsi_alloc_queue(shost, fc_bsg_host_handler); 4044 if (!q) { 4045 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4046 "initialize - no request queue\n", 4047 shost->host_no); 4048 return -ENOMEM; 4049 } 4050 4051 q->queuedata = shost; 4052 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4053 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4054 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4055 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4056 4057 err = bsg_register_queue(q, dev, bsg_name, NULL); 4058 if (err) { 4059 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4060 "initialize - register queue\n", 4061 shost->host_no); 4062 blk_cleanup_queue(q); 4063 return err; 4064 } 4065 4066 fc_host->rqst_q = q; 4067 return 0; 4068 } 4069 4070 4071 /** 4072 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4073 * @shost: shost that rport is attached to 4074 * @rport: rport that the bsg hooks are being attached to 4075 */ 4076 static int 4077 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4078 { 4079 struct device *dev = &rport->dev; 4080 struct fc_internal *i = to_fc_internal(shost->transportt); 4081 struct request_queue *q; 4082 int err; 4083 4084 rport->rqst_q = NULL; 4085 4086 if (!i->f->bsg_request) 4087 return -ENOTSUPP; 4088 4089 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); 4090 if (!q) { 4091 printk(KERN_ERR "%s: bsg interface failed to " 4092 "initialize - no request queue\n", 4093 dev->kobj.name); 4094 return -ENOMEM; 4095 } 4096 4097 q->queuedata = rport; 4098 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4099 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4100 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4101 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4102 4103 err = bsg_register_queue(q, dev, NULL, NULL); 4104 if (err) { 4105 printk(KERN_ERR "%s: bsg interface failed to " 4106 "initialize - register queue\n", 4107 dev->kobj.name); 4108 blk_cleanup_queue(q); 4109 return err; 4110 } 4111 4112 rport->rqst_q = q; 4113 return 0; 4114 } 4115 4116 4117 /** 4118 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4119 * @q: the request_queue that is to be torn down. 4120 * 4121 * Notes: 4122 * Before unregistering the queue empty any requests that are blocked 4123 * 4124 * 4125 */ 4126 static void 4127 fc_bsg_remove(struct request_queue *q) 4128 { 4129 struct request *req; /* block request */ 4130 int counts; /* totals for request_list count and starved */ 4131 4132 if (q) { 4133 /* Stop taking in new requests */ 4134 spin_lock_irq(q->queue_lock); 4135 blk_stop_queue(q); 4136 4137 /* drain all requests in the queue */ 4138 while (1) { 4139 /* need the lock to fetch a request 4140 * this may fetch the same reqeust as the previous pass 4141 */ 4142 req = blk_fetch_request(q); 4143 /* save requests in use and starved */ 4144 counts = q->rq.count[0] + q->rq.count[1] + 4145 q->rq.starved[0] + q->rq.starved[1]; 4146 spin_unlock_irq(q->queue_lock); 4147 /* any requests still outstanding? */ 4148 if (counts == 0) 4149 break; 4150 4151 /* This may be the same req as the previous iteration, 4152 * always send the blk_end_request_all after a prefetch. 4153 * It is not okay to not end the request because the 4154 * prefetch started the request. 4155 */ 4156 if (req) { 4157 /* return -ENXIO to indicate that this queue is 4158 * going away 4159 */ 4160 req->errors = -ENXIO; 4161 blk_end_request_all(req, -ENXIO); 4162 } 4163 4164 msleep(200); /* allow bsg to possibly finish */ 4165 spin_lock_irq(q->queue_lock); 4166 } 4167 4168 bsg_unregister_queue(q); 4169 blk_cleanup_queue(q); 4170 } 4171 } 4172 4173 4174 /* Original Author: Martin Hicks */ 4175 MODULE_AUTHOR("James Smart"); 4176 MODULE_DESCRIPTION("FC Transport Attributes"); 4177 MODULE_LICENSE("GPL"); 4178 4179 module_init(fc_transport_init); 4180 module_exit(fc_transport_exit); 4181