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 22 317 318 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)); 402 403 fc_host->port_id = -1; 404 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 405 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 406 memset(fc_host->active_fc4s, 0, 407 sizeof(fc_host->active_fc4s)); 408 fc_host->speed = FC_PORTSPEED_UNKNOWN; 409 fc_host->fabric_name = -1; 410 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 411 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 412 413 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 414 415 INIT_LIST_HEAD(&fc_host->rports); 416 INIT_LIST_HEAD(&fc_host->rport_bindings); 417 INIT_LIST_HEAD(&fc_host->vports); 418 fc_host->next_rport_number = 0; 419 fc_host->next_target_id = 0; 420 fc_host->next_vport_number = 0; 421 fc_host->npiv_vports_inuse = 0; 422 423 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 424 "fc_wq_%d", shost->host_no); 425 fc_host->work_q = create_singlethread_workqueue( 426 fc_host->work_q_name); 427 if (!fc_host->work_q) 428 return -ENOMEM; 429 430 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 431 snprintf(fc_host->devloss_work_q_name, 432 sizeof(fc_host->devloss_work_q_name), 433 "fc_dl_%d", shost->host_no); 434 fc_host->devloss_work_q = create_singlethread_workqueue( 435 fc_host->devloss_work_q_name); 436 if (!fc_host->devloss_work_q) { 437 destroy_workqueue(fc_host->work_q); 438 fc_host->work_q = NULL; 439 return -ENOMEM; 440 } 441 442 fc_bsg_hostadd(shost, fc_host); 443 /* ignore any bsg add error - we just can't do sgio */ 444 445 return 0; 446 } 447 448 static int fc_host_remove(struct transport_container *tc, struct device *dev, 449 struct device *cdev) 450 { 451 struct Scsi_Host *shost = dev_to_shost(dev); 452 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 453 454 fc_bsg_remove(fc_host->rqst_q); 455 return 0; 456 } 457 458 static DECLARE_TRANSPORT_CLASS(fc_host_class, 459 "fc_host", 460 fc_host_setup, 461 fc_host_remove, 462 NULL); 463 464 /* 465 * Setup and Remove actions for remote ports are handled 466 * in the service functions below. 467 */ 468 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 469 "fc_remote_ports", 470 NULL, 471 NULL, 472 NULL); 473 474 /* 475 * Setup and Remove actions for virtual ports are handled 476 * in the service functions below. 477 */ 478 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 479 "fc_vports", 480 NULL, 481 NULL, 482 NULL); 483 484 /* 485 * Netlink Infrastructure 486 */ 487 488 static atomic_t fc_event_seq; 489 490 /** 491 * fc_get_event_number - Obtain the next sequential FC event number 492 * 493 * Notes: 494 * We could have inlined this, but it would have required fc_event_seq to 495 * be exposed. For now, live with the subroutine call. 496 * Atomic used to avoid lock/unlock... 497 */ 498 u32 499 fc_get_event_number(void) 500 { 501 return atomic_add_return(1, &fc_event_seq); 502 } 503 EXPORT_SYMBOL(fc_get_event_number); 504 505 506 /** 507 * fc_host_post_event - called to post an even on an fc_host. 508 * @shost: host the event occurred on 509 * @event_number: fc event number obtained from get_fc_event_number() 510 * @event_code: fc_host event being posted 511 * @event_data: 32bits of data for the event being posted 512 * 513 * Notes: 514 * This routine assumes no locks are held on entry. 515 */ 516 void 517 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 518 enum fc_host_event_code event_code, u32 event_data) 519 { 520 struct sk_buff *skb; 521 struct nlmsghdr *nlh; 522 struct fc_nl_event *event; 523 const char *name; 524 u32 len, skblen; 525 int err; 526 527 if (!scsi_nl_sock) { 528 err = -ENOENT; 529 goto send_fail; 530 } 531 532 len = FC_NL_MSGALIGN(sizeof(*event)); 533 skblen = NLMSG_SPACE(len); 534 535 skb = alloc_skb(skblen, GFP_KERNEL); 536 if (!skb) { 537 err = -ENOBUFS; 538 goto send_fail; 539 } 540 541 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, 542 skblen - sizeof(*nlh), 0); 543 if (!nlh) { 544 err = -ENOBUFS; 545 goto send_fail_skb; 546 } 547 event = NLMSG_DATA(nlh); 548 549 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 550 FC_NL_ASYNC_EVENT, len); 551 event->seconds = get_seconds(); 552 event->vendor_id = 0; 553 event->host_no = shost->host_no; 554 event->event_datalen = sizeof(u32); /* bytes */ 555 event->event_num = event_number; 556 event->event_code = event_code; 557 event->event_data = event_data; 558 559 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 560 GFP_KERNEL); 561 return; 562 563 send_fail_skb: 564 kfree_skb(skb); 565 send_fail: 566 name = get_fc_host_event_code_name(event_code); 567 printk(KERN_WARNING 568 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 569 __func__, shost->host_no, 570 (name) ? name : "<unknown>", event_data, err); 571 return; 572 } 573 EXPORT_SYMBOL(fc_host_post_event); 574 575 576 /** 577 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host 578 * @shost: host the event occurred on 579 * @event_number: fc event number obtained from get_fc_event_number() 580 * @data_len: amount, in bytes, of vendor unique data 581 * @data_buf: pointer to vendor unique data 582 * @vendor_id: Vendor id 583 * 584 * Notes: 585 * This routine assumes no locks are held on entry. 586 */ 587 void 588 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 589 u32 data_len, char * data_buf, u64 vendor_id) 590 { 591 struct sk_buff *skb; 592 struct nlmsghdr *nlh; 593 struct fc_nl_event *event; 594 u32 len, skblen; 595 int err; 596 597 if (!scsi_nl_sock) { 598 err = -ENOENT; 599 goto send_vendor_fail; 600 } 601 602 len = FC_NL_MSGALIGN(sizeof(*event) + data_len); 603 skblen = NLMSG_SPACE(len); 604 605 skb = alloc_skb(skblen, GFP_KERNEL); 606 if (!skb) { 607 err = -ENOBUFS; 608 goto send_vendor_fail; 609 } 610 611 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, 612 skblen - sizeof(*nlh), 0); 613 if (!nlh) { 614 err = -ENOBUFS; 615 goto send_vendor_fail_skb; 616 } 617 event = NLMSG_DATA(nlh); 618 619 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 620 FC_NL_ASYNC_EVENT, len); 621 event->seconds = get_seconds(); 622 event->vendor_id = vendor_id; 623 event->host_no = shost->host_no; 624 event->event_datalen = data_len; /* bytes */ 625 event->event_num = event_number; 626 event->event_code = FCH_EVT_VENDOR_UNIQUE; 627 memcpy(&event->event_data, data_buf, data_len); 628 629 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 630 GFP_KERNEL); 631 return; 632 633 send_vendor_fail_skb: 634 kfree_skb(skb); 635 send_vendor_fail: 636 printk(KERN_WARNING 637 "%s: Dropped Event : host %d vendor_unique - err %d\n", 638 __func__, shost->host_no, err); 639 return; 640 } 641 EXPORT_SYMBOL(fc_host_post_vendor_event); 642 643 644 645 static __init int fc_transport_init(void) 646 { 647 int error; 648 649 atomic_set(&fc_event_seq, 0); 650 651 error = transport_class_register(&fc_host_class); 652 if (error) 653 return error; 654 error = transport_class_register(&fc_vport_class); 655 if (error) 656 goto unreg_host_class; 657 error = transport_class_register(&fc_rport_class); 658 if (error) 659 goto unreg_vport_class; 660 error = transport_class_register(&fc_transport_class); 661 if (error) 662 goto unreg_rport_class; 663 return 0; 664 665 unreg_rport_class: 666 transport_class_unregister(&fc_rport_class); 667 unreg_vport_class: 668 transport_class_unregister(&fc_vport_class); 669 unreg_host_class: 670 transport_class_unregister(&fc_host_class); 671 return error; 672 } 673 674 static void __exit fc_transport_exit(void) 675 { 676 transport_class_unregister(&fc_transport_class); 677 transport_class_unregister(&fc_rport_class); 678 transport_class_unregister(&fc_host_class); 679 transport_class_unregister(&fc_vport_class); 680 } 681 682 /* 683 * FC Remote Port Attribute Management 684 */ 685 686 #define fc_rport_show_function(field, format_string, sz, cast) \ 687 static ssize_t \ 688 show_fc_rport_##field (struct device *dev, \ 689 struct device_attribute *attr, char *buf) \ 690 { \ 691 struct fc_rport *rport = transport_class_to_rport(dev); \ 692 struct Scsi_Host *shost = rport_to_shost(rport); \ 693 struct fc_internal *i = to_fc_internal(shost->transportt); \ 694 if ((i->f->get_rport_##field) && \ 695 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 696 (rport->port_state == FC_PORTSTATE_DELETED) || \ 697 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 698 i->f->get_rport_##field(rport); \ 699 return snprintf(buf, sz, format_string, cast rport->field); \ 700 } 701 702 #define fc_rport_store_function(field) \ 703 static ssize_t \ 704 store_fc_rport_##field(struct device *dev, \ 705 struct device_attribute *attr, \ 706 const char *buf, size_t count) \ 707 { \ 708 int val; \ 709 struct fc_rport *rport = transport_class_to_rport(dev); \ 710 struct Scsi_Host *shost = rport_to_shost(rport); \ 711 struct fc_internal *i = to_fc_internal(shost->transportt); \ 712 char *cp; \ 713 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 714 (rport->port_state == FC_PORTSTATE_DELETED) || \ 715 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 716 return -EBUSY; \ 717 val = simple_strtoul(buf, &cp, 0); \ 718 if (*cp && (*cp != '\n')) \ 719 return -EINVAL; \ 720 i->f->set_rport_##field(rport, val); \ 721 return count; \ 722 } 723 724 #define fc_rport_rd_attr(field, format_string, sz) \ 725 fc_rport_show_function(field, format_string, sz, ) \ 726 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 727 show_fc_rport_##field, NULL) 728 729 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 730 fc_rport_show_function(field, format_string, sz, (cast)) \ 731 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 732 show_fc_rport_##field, NULL) 733 734 #define fc_rport_rw_attr(field, format_string, sz) \ 735 fc_rport_show_function(field, format_string, sz, ) \ 736 fc_rport_store_function(field) \ 737 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 738 show_fc_rport_##field, \ 739 store_fc_rport_##field) 740 741 742 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 743 static ssize_t \ 744 show_fc_rport_##field (struct device *dev, \ 745 struct device_attribute *attr, char *buf) \ 746 { \ 747 struct fc_rport *rport = transport_class_to_rport(dev); \ 748 return snprintf(buf, sz, format_string, cast rport->field); \ 749 } 750 751 #define fc_private_rport_rd_attr(field, format_string, sz) \ 752 fc_private_rport_show_function(field, format_string, sz, ) \ 753 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 754 show_fc_rport_##field, NULL) 755 756 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 757 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 758 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 759 show_fc_rport_##field, NULL) 760 761 762 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 763 static ssize_t \ 764 show_fc_rport_##title (struct device *dev, \ 765 struct device_attribute *attr, char *buf) \ 766 { \ 767 struct fc_rport *rport = transport_class_to_rport(dev); \ 768 const char *name; \ 769 name = get_fc_##title##_name(rport->title); \ 770 if (!name) \ 771 return -EINVAL; \ 772 return snprintf(buf, maxlen, "%s\n", name); \ 773 } \ 774 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 775 show_fc_rport_##title, NULL) 776 777 778 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 779 i->private_rport_attrs[count] = device_attr_rport_##field; \ 780 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 781 i->private_rport_attrs[count].store = NULL; \ 782 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 783 if (i->f->show_rport_##field) \ 784 count++ 785 786 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 787 i->private_rport_attrs[count] = device_attr_rport_##field; \ 788 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 789 i->private_rport_attrs[count].store = NULL; \ 790 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 791 count++ 792 793 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 794 i->private_rport_attrs[count] = device_attr_rport_##field; \ 795 if (!i->f->set_rport_##field) { \ 796 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 797 i->private_rport_attrs[count].store = NULL; \ 798 } \ 799 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 800 if (i->f->show_rport_##field) \ 801 count++ 802 803 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 804 { \ 805 i->private_rport_attrs[count] = device_attr_rport_##field; \ 806 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 807 count++; \ 808 } 809 810 811 /* The FC Transport Remote Port Attributes: */ 812 813 /* Fixed Remote Port Attributes */ 814 815 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 816 817 static ssize_t 818 show_fc_rport_supported_classes (struct device *dev, 819 struct device_attribute *attr, char *buf) 820 { 821 struct fc_rport *rport = transport_class_to_rport(dev); 822 if (rport->supported_classes == FC_COS_UNSPECIFIED) 823 return snprintf(buf, 20, "unspecified\n"); 824 return get_fc_cos_names(rport->supported_classes, buf); 825 } 826 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 827 show_fc_rport_supported_classes, NULL); 828 829 /* Dynamic Remote Port Attributes */ 830 831 /* 832 * dev_loss_tmo attribute 833 */ 834 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 835 { 836 char *cp; 837 838 *val = simple_strtoul(buf, &cp, 0); 839 if ((*cp && (*cp != '\n')) || (*val < 0)) 840 return -EINVAL; 841 /* 842 * Check for overflow; dev_loss_tmo is u32 843 */ 844 if (*val > UINT_MAX) 845 return -EINVAL; 846 847 return 0; 848 } 849 850 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 851 unsigned long val) 852 { 853 struct Scsi_Host *shost = rport_to_shost(rport); 854 struct fc_internal *i = to_fc_internal(shost->transportt); 855 856 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 857 (rport->port_state == FC_PORTSTATE_DELETED) || 858 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 859 return -EBUSY; 860 /* 861 * Check for overflow; dev_loss_tmo is u32 862 */ 863 if (val > UINT_MAX) 864 return -EINVAL; 865 866 /* 867 * If fast_io_fail is off we have to cap 868 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 869 */ 870 if (rport->fast_io_fail_tmo == -1 && 871 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 872 return -EINVAL; 873 874 i->f->set_rport_dev_loss_tmo(rport, val); 875 return 0; 876 } 877 878 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) 879 static ssize_t 880 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 881 const char *buf, size_t count) 882 { 883 struct fc_rport *rport = transport_class_to_rport(dev); 884 unsigned long val; 885 int rc; 886 887 rc = fc_str_to_dev_loss(buf, &val); 888 if (rc) 889 return rc; 890 891 rc = fc_rport_set_dev_loss_tmo(rport, val); 892 if (rc) 893 return rc; 894 return count; 895 } 896 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 897 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 898 899 900 /* Private Remote Port Attributes */ 901 902 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 903 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 904 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 905 906 static ssize_t 907 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 908 char *buf) 909 { 910 struct fc_rport *rport = transport_class_to_rport(dev); 911 912 /* identify any roles that are port_id specific */ 913 if ((rport->port_id != -1) && 914 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 915 FC_WELLKNOWN_PORTID_MASK) { 916 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 917 case FC_FPORT_PORTID: 918 return snprintf(buf, 30, "Fabric Port\n"); 919 case FC_FABCTLR_PORTID: 920 return snprintf(buf, 30, "Fabric Controller\n"); 921 case FC_DIRSRVR_PORTID: 922 return snprintf(buf, 30, "Directory Server\n"); 923 case FC_TIMESRVR_PORTID: 924 return snprintf(buf, 30, "Time Server\n"); 925 case FC_MGMTSRVR_PORTID: 926 return snprintf(buf, 30, "Management Server\n"); 927 default: 928 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 929 } 930 } else { 931 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 932 return snprintf(buf, 20, "unknown\n"); 933 return get_fc_port_roles_names(rport->roles, buf); 934 } 935 } 936 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 937 show_fc_rport_roles, NULL); 938 939 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 940 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 941 942 /* 943 * fast_io_fail_tmo attribute 944 */ 945 static ssize_t 946 show_fc_rport_fast_io_fail_tmo (struct device *dev, 947 struct device_attribute *attr, char *buf) 948 { 949 struct fc_rport *rport = transport_class_to_rport(dev); 950 951 if (rport->fast_io_fail_tmo == -1) 952 return snprintf(buf, 5, "off\n"); 953 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 954 } 955 956 static ssize_t 957 store_fc_rport_fast_io_fail_tmo(struct device *dev, 958 struct device_attribute *attr, const char *buf, 959 size_t count) 960 { 961 int val; 962 char *cp; 963 struct fc_rport *rport = transport_class_to_rport(dev); 964 965 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 966 (rport->port_state == FC_PORTSTATE_DELETED) || 967 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 968 return -EBUSY; 969 if (strncmp(buf, "off", 3) == 0) 970 rport->fast_io_fail_tmo = -1; 971 else { 972 val = simple_strtoul(buf, &cp, 0); 973 if ((*cp && (*cp != '\n')) || (val < 0)) 974 return -EINVAL; 975 /* 976 * Cap fast_io_fail by dev_loss_tmo or 977 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 978 */ 979 if ((val >= rport->dev_loss_tmo) || 980 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 981 return -EINVAL; 982 983 rport->fast_io_fail_tmo = val; 984 } 985 return count; 986 } 987 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 988 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 989 990 991 /* 992 * FC SCSI Target Attribute Management 993 */ 994 995 /* 996 * Note: in the target show function we recognize when the remote 997 * port is in the hierarchy and do not allow the driver to get 998 * involved in sysfs functions. The driver only gets involved if 999 * it's the "old" style that doesn't use rports. 1000 */ 1001 #define fc_starget_show_function(field, format_string, sz, cast) \ 1002 static ssize_t \ 1003 show_fc_starget_##field (struct device *dev, \ 1004 struct device_attribute *attr, char *buf) \ 1005 { \ 1006 struct scsi_target *starget = transport_class_to_starget(dev); \ 1007 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1008 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1009 struct fc_rport *rport = starget_to_rport(starget); \ 1010 if (rport) \ 1011 fc_starget_##field(starget) = rport->field; \ 1012 else if (i->f->get_starget_##field) \ 1013 i->f->get_starget_##field(starget); \ 1014 return snprintf(buf, sz, format_string, \ 1015 cast fc_starget_##field(starget)); \ 1016 } 1017 1018 #define fc_starget_rd_attr(field, format_string, sz) \ 1019 fc_starget_show_function(field, format_string, sz, ) \ 1020 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1021 show_fc_starget_##field, NULL) 1022 1023 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1024 fc_starget_show_function(field, format_string, sz, (cast)) \ 1025 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1026 show_fc_starget_##field, NULL) 1027 1028 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1029 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1030 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1031 i->private_starget_attrs[count].store = NULL; \ 1032 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1033 if (i->f->show_starget_##field) \ 1034 count++ 1035 1036 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1037 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1038 if (!i->f->set_starget_##field) { \ 1039 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1040 i->private_starget_attrs[count].store = NULL; \ 1041 } \ 1042 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1043 if (i->f->show_starget_##field) \ 1044 count++ 1045 1046 /* The FC Transport SCSI Target Attributes: */ 1047 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1048 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1049 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1050 1051 1052 /* 1053 * FC Virtual Port Attribute Management 1054 */ 1055 1056 #define fc_vport_show_function(field, format_string, sz, cast) \ 1057 static ssize_t \ 1058 show_fc_vport_##field (struct device *dev, \ 1059 struct device_attribute *attr, char *buf) \ 1060 { \ 1061 struct fc_vport *vport = transport_class_to_vport(dev); \ 1062 struct Scsi_Host *shost = vport_to_shost(vport); \ 1063 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1064 if ((i->f->get_vport_##field) && \ 1065 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1066 i->f->get_vport_##field(vport); \ 1067 return snprintf(buf, sz, format_string, cast vport->field); \ 1068 } 1069 1070 #define fc_vport_store_function(field) \ 1071 static ssize_t \ 1072 store_fc_vport_##field(struct device *dev, \ 1073 struct device_attribute *attr, \ 1074 const char *buf, size_t count) \ 1075 { \ 1076 int val; \ 1077 struct fc_vport *vport = transport_class_to_vport(dev); \ 1078 struct Scsi_Host *shost = vport_to_shost(vport); \ 1079 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1080 char *cp; \ 1081 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1082 return -EBUSY; \ 1083 val = simple_strtoul(buf, &cp, 0); \ 1084 if (*cp && (*cp != '\n')) \ 1085 return -EINVAL; \ 1086 i->f->set_vport_##field(vport, val); \ 1087 return count; \ 1088 } 1089 1090 #define fc_vport_store_str_function(field, slen) \ 1091 static ssize_t \ 1092 store_fc_vport_##field(struct device *dev, \ 1093 struct device_attribute *attr, \ 1094 const char *buf, size_t count) \ 1095 { \ 1096 struct fc_vport *vport = transport_class_to_vport(dev); \ 1097 struct Scsi_Host *shost = vport_to_shost(vport); \ 1098 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1099 unsigned int cnt=count; \ 1100 \ 1101 /* count may include a LF at end of string */ \ 1102 if (buf[cnt-1] == '\n') \ 1103 cnt--; \ 1104 if (cnt > ((slen) - 1)) \ 1105 return -EINVAL; \ 1106 memcpy(vport->field, buf, cnt); \ 1107 i->f->set_vport_##field(vport); \ 1108 return count; \ 1109 } 1110 1111 #define fc_vport_rd_attr(field, format_string, sz) \ 1112 fc_vport_show_function(field, format_string, sz, ) \ 1113 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1114 show_fc_vport_##field, NULL) 1115 1116 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1117 fc_vport_show_function(field, format_string, sz, (cast)) \ 1118 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1119 show_fc_vport_##field, NULL) 1120 1121 #define fc_vport_rw_attr(field, format_string, sz) \ 1122 fc_vport_show_function(field, format_string, sz, ) \ 1123 fc_vport_store_function(field) \ 1124 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1125 show_fc_vport_##field, \ 1126 store_fc_vport_##field) 1127 1128 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1129 static ssize_t \ 1130 show_fc_vport_##field (struct device *dev, \ 1131 struct device_attribute *attr, char *buf) \ 1132 { \ 1133 struct fc_vport *vport = transport_class_to_vport(dev); \ 1134 return snprintf(buf, sz, format_string, cast vport->field); \ 1135 } 1136 1137 #define fc_private_vport_store_u32_function(field) \ 1138 static ssize_t \ 1139 store_fc_vport_##field(struct device *dev, \ 1140 struct device_attribute *attr, \ 1141 const char *buf, size_t count) \ 1142 { \ 1143 u32 val; \ 1144 struct fc_vport *vport = transport_class_to_vport(dev); \ 1145 char *cp; \ 1146 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1147 return -EBUSY; \ 1148 val = simple_strtoul(buf, &cp, 0); \ 1149 if (*cp && (*cp != '\n')) \ 1150 return -EINVAL; \ 1151 vport->field = val; \ 1152 return count; \ 1153 } 1154 1155 1156 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1157 fc_private_vport_show_function(field, format_string, sz, ) \ 1158 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1159 show_fc_vport_##field, NULL) 1160 1161 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1162 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1163 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1164 show_fc_vport_##field, NULL) 1165 1166 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1167 fc_private_vport_show_function(field, format_string, sz, ) \ 1168 fc_private_vport_store_u32_function(field) \ 1169 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1170 show_fc_vport_##field, \ 1171 store_fc_vport_##field) 1172 1173 1174 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1175 static ssize_t \ 1176 show_fc_vport_##title (struct device *dev, \ 1177 struct device_attribute *attr, \ 1178 char *buf) \ 1179 { \ 1180 struct fc_vport *vport = transport_class_to_vport(dev); \ 1181 const char *name; \ 1182 name = get_fc_##title##_name(vport->title); \ 1183 if (!name) \ 1184 return -EINVAL; \ 1185 return snprintf(buf, maxlen, "%s\n", name); \ 1186 } \ 1187 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1188 show_fc_vport_##title, NULL) 1189 1190 1191 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1192 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1193 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1194 i->private_vport_attrs[count].store = NULL; \ 1195 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1196 if (i->f->get_##field) \ 1197 count++ 1198 /* NOTE: Above MACRO differs: checks function not show bit */ 1199 1200 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1201 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1202 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1203 i->private_vport_attrs[count].store = NULL; \ 1204 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1205 count++ 1206 1207 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1208 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1209 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1210 if (i->f->field) \ 1211 count++ 1212 /* NOTE: Above MACRO differs: checks function */ 1213 1214 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1215 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1216 if (!i->f->set_vport_##field) { \ 1217 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1218 i->private_vport_attrs[count].store = NULL; \ 1219 } \ 1220 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1221 count++ 1222 /* NOTE: Above MACRO differs: does not check show bit */ 1223 1224 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1225 { \ 1226 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1227 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1228 count++; \ 1229 } 1230 1231 1232 /* The FC Transport Virtual Port Attributes: */ 1233 1234 /* Fixed Virtual Port Attributes */ 1235 1236 /* Dynamic Virtual Port Attributes */ 1237 1238 /* Private Virtual Port Attributes */ 1239 1240 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1241 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1242 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1243 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1244 1245 static ssize_t 1246 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1247 char *buf) 1248 { 1249 struct fc_vport *vport = transport_class_to_vport(dev); 1250 1251 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1252 return snprintf(buf, 20, "unknown\n"); 1253 return get_fc_port_roles_names(vport->roles, buf); 1254 } 1255 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1256 1257 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1258 1259 fc_private_vport_show_function(symbolic_name, "%s\n", 1260 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1261 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1262 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1263 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1264 1265 static ssize_t 1266 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1267 const char *buf, size_t count) 1268 { 1269 struct fc_vport *vport = transport_class_to_vport(dev); 1270 struct Scsi_Host *shost = vport_to_shost(vport); 1271 unsigned long flags; 1272 1273 spin_lock_irqsave(shost->host_lock, flags); 1274 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1275 spin_unlock_irqrestore(shost->host_lock, flags); 1276 return -EBUSY; 1277 } 1278 vport->flags |= FC_VPORT_DELETING; 1279 spin_unlock_irqrestore(shost->host_lock, flags); 1280 1281 fc_queue_work(shost, &vport->vport_delete_work); 1282 return count; 1283 } 1284 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1285 NULL, store_fc_vport_delete); 1286 1287 1288 /* 1289 * Enable/Disable vport 1290 * Write "1" to disable, write "0" to enable 1291 */ 1292 static ssize_t 1293 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1294 const char *buf, 1295 size_t count) 1296 { 1297 struct fc_vport *vport = transport_class_to_vport(dev); 1298 struct Scsi_Host *shost = vport_to_shost(vport); 1299 struct fc_internal *i = to_fc_internal(shost->transportt); 1300 int stat; 1301 1302 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1303 return -EBUSY; 1304 1305 if (*buf == '0') { 1306 if (vport->vport_state != FC_VPORT_DISABLED) 1307 return -EALREADY; 1308 } else if (*buf == '1') { 1309 if (vport->vport_state == FC_VPORT_DISABLED) 1310 return -EALREADY; 1311 } else 1312 return -EINVAL; 1313 1314 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1315 return stat ? stat : count; 1316 } 1317 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1318 NULL, store_fc_vport_disable); 1319 1320 1321 /* 1322 * Host Attribute Management 1323 */ 1324 1325 #define fc_host_show_function(field, format_string, sz, cast) \ 1326 static ssize_t \ 1327 show_fc_host_##field (struct device *dev, \ 1328 struct device_attribute *attr, char *buf) \ 1329 { \ 1330 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1331 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1332 if (i->f->get_host_##field) \ 1333 i->f->get_host_##field(shost); \ 1334 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1335 } 1336 1337 #define fc_host_store_function(field) \ 1338 static ssize_t \ 1339 store_fc_host_##field(struct device *dev, \ 1340 struct device_attribute *attr, \ 1341 const char *buf, size_t count) \ 1342 { \ 1343 int val; \ 1344 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1345 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1346 char *cp; \ 1347 \ 1348 val = simple_strtoul(buf, &cp, 0); \ 1349 if (*cp && (*cp != '\n')) \ 1350 return -EINVAL; \ 1351 i->f->set_host_##field(shost, val); \ 1352 return count; \ 1353 } 1354 1355 #define fc_host_store_str_function(field, slen) \ 1356 static ssize_t \ 1357 store_fc_host_##field(struct device *dev, \ 1358 struct device_attribute *attr, \ 1359 const char *buf, size_t count) \ 1360 { \ 1361 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1362 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1363 unsigned int cnt=count; \ 1364 \ 1365 /* count may include a LF at end of string */ \ 1366 if (buf[cnt-1] == '\n') \ 1367 cnt--; \ 1368 if (cnt > ((slen) - 1)) \ 1369 return -EINVAL; \ 1370 memcpy(fc_host_##field(shost), buf, cnt); \ 1371 i->f->set_host_##field(shost); \ 1372 return count; \ 1373 } 1374 1375 #define fc_host_rd_attr(field, format_string, sz) \ 1376 fc_host_show_function(field, format_string, sz, ) \ 1377 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1378 show_fc_host_##field, NULL) 1379 1380 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1381 fc_host_show_function(field, format_string, sz, (cast)) \ 1382 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1383 show_fc_host_##field, NULL) 1384 1385 #define fc_host_rw_attr(field, format_string, sz) \ 1386 fc_host_show_function(field, format_string, sz, ) \ 1387 fc_host_store_function(field) \ 1388 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1389 show_fc_host_##field, \ 1390 store_fc_host_##field) 1391 1392 #define fc_host_rd_enum_attr(title, maxlen) \ 1393 static ssize_t \ 1394 show_fc_host_##title (struct device *dev, \ 1395 struct device_attribute *attr, char *buf) \ 1396 { \ 1397 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1398 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1399 const char *name; \ 1400 if (i->f->get_host_##title) \ 1401 i->f->get_host_##title(shost); \ 1402 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1403 if (!name) \ 1404 return -EINVAL; \ 1405 return snprintf(buf, maxlen, "%s\n", name); \ 1406 } \ 1407 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1408 1409 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1410 i->private_host_attrs[count] = device_attr_host_##field; \ 1411 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1412 i->private_host_attrs[count].store = NULL; \ 1413 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1414 if (i->f->show_host_##field) \ 1415 count++ 1416 1417 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1418 i->private_host_attrs[count] = device_attr_host_##field; \ 1419 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1420 i->private_host_attrs[count].store = NULL; \ 1421 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1422 count++ 1423 1424 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1425 i->private_host_attrs[count] = device_attr_host_##field; \ 1426 if (!i->f->set_host_##field) { \ 1427 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1428 i->private_host_attrs[count].store = NULL; \ 1429 } \ 1430 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1431 if (i->f->show_host_##field) \ 1432 count++ 1433 1434 1435 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1436 static ssize_t \ 1437 show_fc_host_##field (struct device *dev, \ 1438 struct device_attribute *attr, char *buf) \ 1439 { \ 1440 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1441 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1442 } 1443 1444 #define fc_private_host_rd_attr(field, format_string, sz) \ 1445 fc_private_host_show_function(field, format_string, sz, ) \ 1446 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1447 show_fc_host_##field, NULL) 1448 1449 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1450 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1451 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1452 show_fc_host_##field, NULL) 1453 1454 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1455 i->private_host_attrs[count] = device_attr_host_##field; \ 1456 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1457 i->private_host_attrs[count].store = NULL; \ 1458 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1459 count++ 1460 1461 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1462 { \ 1463 i->private_host_attrs[count] = device_attr_host_##field; \ 1464 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1465 count++; \ 1466 } 1467 1468 1469 /* Fixed Host Attributes */ 1470 1471 static ssize_t 1472 show_fc_host_supported_classes (struct device *dev, 1473 struct device_attribute *attr, char *buf) 1474 { 1475 struct Scsi_Host *shost = transport_class_to_shost(dev); 1476 1477 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1478 return snprintf(buf, 20, "unspecified\n"); 1479 1480 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1481 } 1482 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1483 show_fc_host_supported_classes, NULL); 1484 1485 static ssize_t 1486 show_fc_host_supported_fc4s (struct device *dev, 1487 struct device_attribute *attr, char *buf) 1488 { 1489 struct Scsi_Host *shost = transport_class_to_shost(dev); 1490 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1491 } 1492 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1493 show_fc_host_supported_fc4s, NULL); 1494 1495 static ssize_t 1496 show_fc_host_supported_speeds (struct device *dev, 1497 struct device_attribute *attr, char *buf) 1498 { 1499 struct Scsi_Host *shost = transport_class_to_shost(dev); 1500 1501 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1502 return snprintf(buf, 20, "unknown\n"); 1503 1504 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1505 } 1506 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1507 show_fc_host_supported_speeds, NULL); 1508 1509 1510 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1511 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1512 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1513 unsigned long long); 1514 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1515 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1516 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1517 1518 1519 /* Dynamic Host Attributes */ 1520 1521 static ssize_t 1522 show_fc_host_active_fc4s (struct device *dev, 1523 struct device_attribute *attr, char *buf) 1524 { 1525 struct Scsi_Host *shost = transport_class_to_shost(dev); 1526 struct fc_internal *i = to_fc_internal(shost->transportt); 1527 1528 if (i->f->get_host_active_fc4s) 1529 i->f->get_host_active_fc4s(shost); 1530 1531 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1532 } 1533 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1534 show_fc_host_active_fc4s, NULL); 1535 1536 static ssize_t 1537 show_fc_host_speed (struct device *dev, 1538 struct device_attribute *attr, char *buf) 1539 { 1540 struct Scsi_Host *shost = transport_class_to_shost(dev); 1541 struct fc_internal *i = to_fc_internal(shost->transportt); 1542 1543 if (i->f->get_host_speed) 1544 i->f->get_host_speed(shost); 1545 1546 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1547 return snprintf(buf, 20, "unknown\n"); 1548 1549 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1550 } 1551 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1552 show_fc_host_speed, NULL); 1553 1554 1555 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1556 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1557 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1558 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1559 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1560 1561 fc_private_host_show_function(system_hostname, "%s\n", 1562 FC_SYMBOLIC_NAME_SIZE + 1, ) 1563 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1564 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1565 show_fc_host_system_hostname, store_fc_host_system_hostname); 1566 1567 1568 /* Private Host Attributes */ 1569 1570 static ssize_t 1571 show_fc_private_host_tgtid_bind_type(struct device *dev, 1572 struct device_attribute *attr, char *buf) 1573 { 1574 struct Scsi_Host *shost = transport_class_to_shost(dev); 1575 const char *name; 1576 1577 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1578 if (!name) 1579 return -EINVAL; 1580 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1581 } 1582 1583 #define get_list_head_entry(pos, head, member) \ 1584 pos = list_entry((head)->next, typeof(*pos), member) 1585 1586 static ssize_t 1587 store_fc_private_host_tgtid_bind_type(struct device *dev, 1588 struct device_attribute *attr, const char *buf, size_t count) 1589 { 1590 struct Scsi_Host *shost = transport_class_to_shost(dev); 1591 struct fc_rport *rport; 1592 enum fc_tgtid_binding_type val; 1593 unsigned long flags; 1594 1595 if (get_fc_tgtid_bind_type_match(buf, &val)) 1596 return -EINVAL; 1597 1598 /* if changing bind type, purge all unused consistent bindings */ 1599 if (val != fc_host_tgtid_bind_type(shost)) { 1600 spin_lock_irqsave(shost->host_lock, flags); 1601 while (!list_empty(&fc_host_rport_bindings(shost))) { 1602 get_list_head_entry(rport, 1603 &fc_host_rport_bindings(shost), peers); 1604 list_del(&rport->peers); 1605 rport->port_state = FC_PORTSTATE_DELETED; 1606 fc_queue_work(shost, &rport->rport_delete_work); 1607 } 1608 spin_unlock_irqrestore(shost->host_lock, flags); 1609 } 1610 1611 fc_host_tgtid_bind_type(shost) = val; 1612 return count; 1613 } 1614 1615 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 1616 show_fc_private_host_tgtid_bind_type, 1617 store_fc_private_host_tgtid_bind_type); 1618 1619 static ssize_t 1620 store_fc_private_host_issue_lip(struct device *dev, 1621 struct device_attribute *attr, const char *buf, size_t count) 1622 { 1623 struct Scsi_Host *shost = transport_class_to_shost(dev); 1624 struct fc_internal *i = to_fc_internal(shost->transportt); 1625 int ret; 1626 1627 /* ignore any data value written to the attribute */ 1628 if (i->f->issue_fc_host_lip) { 1629 ret = i->f->issue_fc_host_lip(shost); 1630 return ret ? ret: count; 1631 } 1632 1633 return -ENOENT; 1634 } 1635 1636 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 1637 store_fc_private_host_issue_lip); 1638 1639 static ssize_t 1640 store_fc_private_host_dev_loss_tmo(struct device *dev, 1641 struct device_attribute *attr, 1642 const char *buf, size_t count) 1643 { 1644 struct Scsi_Host *shost = transport_class_to_shost(dev); 1645 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1646 struct fc_rport *rport; 1647 unsigned long val, flags; 1648 int rc; 1649 1650 rc = fc_str_to_dev_loss(buf, &val); 1651 if (rc) 1652 return rc; 1653 1654 fc_host_dev_loss_tmo(shost) = val; 1655 spin_lock_irqsave(shost->host_lock, flags); 1656 list_for_each_entry(rport, &fc_host->rports, peers) 1657 fc_rport_set_dev_loss_tmo(rport, val); 1658 spin_unlock_irqrestore(shost->host_lock, flags); 1659 return count; 1660 } 1661 1662 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 1663 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 1664 show_fc_host_dev_loss_tmo, 1665 store_fc_private_host_dev_loss_tmo); 1666 1667 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 1668 1669 /* 1670 * Host Statistics Management 1671 */ 1672 1673 /* Show a given an attribute in the statistics group */ 1674 static ssize_t 1675 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 1676 { 1677 struct Scsi_Host *shost = transport_class_to_shost(dev); 1678 struct fc_internal *i = to_fc_internal(shost->transportt); 1679 struct fc_host_statistics *stats; 1680 ssize_t ret = -ENOENT; 1681 1682 if (offset > sizeof(struct fc_host_statistics) || 1683 offset % sizeof(u64) != 0) 1684 WARN_ON(1); 1685 1686 if (i->f->get_fc_host_stats) { 1687 stats = (i->f->get_fc_host_stats)(shost); 1688 if (stats) 1689 ret = snprintf(buf, 20, "0x%llx\n", 1690 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 1691 } 1692 return ret; 1693 } 1694 1695 1696 /* generate a read-only statistics attribute */ 1697 #define fc_host_statistic(name) \ 1698 static ssize_t show_fcstat_##name(struct device *cd, \ 1699 struct device_attribute *attr, \ 1700 char *buf) \ 1701 { \ 1702 return fc_stat_show(cd, buf, \ 1703 offsetof(struct fc_host_statistics, name)); \ 1704 } \ 1705 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 1706 1707 fc_host_statistic(seconds_since_last_reset); 1708 fc_host_statistic(tx_frames); 1709 fc_host_statistic(tx_words); 1710 fc_host_statistic(rx_frames); 1711 fc_host_statistic(rx_words); 1712 fc_host_statistic(lip_count); 1713 fc_host_statistic(nos_count); 1714 fc_host_statistic(error_frames); 1715 fc_host_statistic(dumped_frames); 1716 fc_host_statistic(link_failure_count); 1717 fc_host_statistic(loss_of_sync_count); 1718 fc_host_statistic(loss_of_signal_count); 1719 fc_host_statistic(prim_seq_protocol_err_count); 1720 fc_host_statistic(invalid_tx_word_count); 1721 fc_host_statistic(invalid_crc_count); 1722 fc_host_statistic(fcp_input_requests); 1723 fc_host_statistic(fcp_output_requests); 1724 fc_host_statistic(fcp_control_requests); 1725 fc_host_statistic(fcp_input_megabytes); 1726 fc_host_statistic(fcp_output_megabytes); 1727 1728 static ssize_t 1729 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 1730 const char *buf, size_t count) 1731 { 1732 struct Scsi_Host *shost = transport_class_to_shost(dev); 1733 struct fc_internal *i = to_fc_internal(shost->transportt); 1734 1735 /* ignore any data value written to the attribute */ 1736 if (i->f->reset_fc_host_stats) { 1737 i->f->reset_fc_host_stats(shost); 1738 return count; 1739 } 1740 1741 return -ENOENT; 1742 } 1743 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 1744 fc_reset_statistics); 1745 1746 static struct attribute *fc_statistics_attrs[] = { 1747 &device_attr_host_seconds_since_last_reset.attr, 1748 &device_attr_host_tx_frames.attr, 1749 &device_attr_host_tx_words.attr, 1750 &device_attr_host_rx_frames.attr, 1751 &device_attr_host_rx_words.attr, 1752 &device_attr_host_lip_count.attr, 1753 &device_attr_host_nos_count.attr, 1754 &device_attr_host_error_frames.attr, 1755 &device_attr_host_dumped_frames.attr, 1756 &device_attr_host_link_failure_count.attr, 1757 &device_attr_host_loss_of_sync_count.attr, 1758 &device_attr_host_loss_of_signal_count.attr, 1759 &device_attr_host_prim_seq_protocol_err_count.attr, 1760 &device_attr_host_invalid_tx_word_count.attr, 1761 &device_attr_host_invalid_crc_count.attr, 1762 &device_attr_host_fcp_input_requests.attr, 1763 &device_attr_host_fcp_output_requests.attr, 1764 &device_attr_host_fcp_control_requests.attr, 1765 &device_attr_host_fcp_input_megabytes.attr, 1766 &device_attr_host_fcp_output_megabytes.attr, 1767 &device_attr_host_reset_statistics.attr, 1768 NULL 1769 }; 1770 1771 static struct attribute_group fc_statistics_group = { 1772 .name = "statistics", 1773 .attrs = fc_statistics_attrs, 1774 }; 1775 1776 1777 /* Host Vport Attributes */ 1778 1779 static int 1780 fc_parse_wwn(const char *ns, u64 *nm) 1781 { 1782 unsigned int i, j; 1783 u8 wwn[8]; 1784 1785 memset(wwn, 0, sizeof(wwn)); 1786 1787 /* Validate and store the new name */ 1788 for (i=0, j=0; i < 16; i++) { 1789 int value; 1790 1791 value = hex_to_bin(*ns++); 1792 if (value >= 0) 1793 j = (j << 4) | value; 1794 else 1795 return -EINVAL; 1796 if (i % 2) { 1797 wwn[i/2] = j & 0xff; 1798 j = 0; 1799 } 1800 } 1801 1802 *nm = wwn_to_u64(wwn); 1803 1804 return 0; 1805 } 1806 1807 1808 /* 1809 * "Short-cut" sysfs variable to create a new vport on a FC Host. 1810 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 1811 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 1812 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 1813 */ 1814 static ssize_t 1815 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 1816 const char *buf, size_t count) 1817 { 1818 struct Scsi_Host *shost = transport_class_to_shost(dev); 1819 struct fc_vport_identifiers vid; 1820 struct fc_vport *vport; 1821 unsigned int cnt=count; 1822 int stat; 1823 1824 memset(&vid, 0, sizeof(vid)); 1825 1826 /* count may include a LF at end of string */ 1827 if (buf[cnt-1] == '\n') 1828 cnt--; 1829 1830 /* validate we have enough characters for WWPN */ 1831 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1832 return -EINVAL; 1833 1834 stat = fc_parse_wwn(&buf[0], &vid.port_name); 1835 if (stat) 1836 return stat; 1837 1838 stat = fc_parse_wwn(&buf[17], &vid.node_name); 1839 if (stat) 1840 return stat; 1841 1842 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 1843 vid.vport_type = FC_PORTTYPE_NPIV; 1844 /* vid.symbolic_name is already zero/NULL's */ 1845 vid.disable = false; /* always enabled */ 1846 1847 /* we only allow support on Channel 0 !!! */ 1848 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 1849 return stat ? stat : count; 1850 } 1851 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 1852 store_fc_host_vport_create); 1853 1854 1855 /* 1856 * "Short-cut" sysfs variable to delete a vport on a FC Host. 1857 * Vport is identified by a string containing "<WWPN>:<WWNN>". 1858 * The WWNs are specified as hex characters, and may *not* contain 1859 * any prefixes (e.g. 0x, x, etc) 1860 */ 1861 static ssize_t 1862 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 1863 const char *buf, size_t count) 1864 { 1865 struct Scsi_Host *shost = transport_class_to_shost(dev); 1866 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 1867 struct fc_vport *vport; 1868 u64 wwpn, wwnn; 1869 unsigned long flags; 1870 unsigned int cnt=count; 1871 int stat, match; 1872 1873 /* count may include a LF at end of string */ 1874 if (buf[cnt-1] == '\n') 1875 cnt--; 1876 1877 /* validate we have enough characters for WWPN */ 1878 if ((cnt != (16+1+16)) || (buf[16] != ':')) 1879 return -EINVAL; 1880 1881 stat = fc_parse_wwn(&buf[0], &wwpn); 1882 if (stat) 1883 return stat; 1884 1885 stat = fc_parse_wwn(&buf[17], &wwnn); 1886 if (stat) 1887 return stat; 1888 1889 spin_lock_irqsave(shost->host_lock, flags); 1890 match = 0; 1891 /* we only allow support on Channel 0 !!! */ 1892 list_for_each_entry(vport, &fc_host->vports, peers) { 1893 if ((vport->channel == 0) && 1894 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 1895 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1896 break; 1897 vport->flags |= FC_VPORT_DELETING; 1898 match = 1; 1899 break; 1900 } 1901 } 1902 spin_unlock_irqrestore(shost->host_lock, flags); 1903 1904 if (!match) 1905 return -ENODEV; 1906 1907 stat = fc_vport_terminate(vport); 1908 return stat ? stat : count; 1909 } 1910 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 1911 store_fc_host_vport_delete); 1912 1913 1914 static int fc_host_match(struct attribute_container *cont, 1915 struct device *dev) 1916 { 1917 struct Scsi_Host *shost; 1918 struct fc_internal *i; 1919 1920 if (!scsi_is_host_device(dev)) 1921 return 0; 1922 1923 shost = dev_to_shost(dev); 1924 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1925 != &fc_host_class.class) 1926 return 0; 1927 1928 i = to_fc_internal(shost->transportt); 1929 1930 return &i->t.host_attrs.ac == cont; 1931 } 1932 1933 static int fc_target_match(struct attribute_container *cont, 1934 struct device *dev) 1935 { 1936 struct Scsi_Host *shost; 1937 struct fc_internal *i; 1938 1939 if (!scsi_is_target_device(dev)) 1940 return 0; 1941 1942 shost = dev_to_shost(dev->parent); 1943 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1944 != &fc_host_class.class) 1945 return 0; 1946 1947 i = to_fc_internal(shost->transportt); 1948 1949 return &i->t.target_attrs.ac == cont; 1950 } 1951 1952 static void fc_rport_dev_release(struct device *dev) 1953 { 1954 struct fc_rport *rport = dev_to_rport(dev); 1955 put_device(dev->parent); 1956 kfree(rport); 1957 } 1958 1959 int scsi_is_fc_rport(const struct device *dev) 1960 { 1961 return dev->release == fc_rport_dev_release; 1962 } 1963 EXPORT_SYMBOL(scsi_is_fc_rport); 1964 1965 static int fc_rport_match(struct attribute_container *cont, 1966 struct device *dev) 1967 { 1968 struct Scsi_Host *shost; 1969 struct fc_internal *i; 1970 1971 if (!scsi_is_fc_rport(dev)) 1972 return 0; 1973 1974 shost = dev_to_shost(dev->parent); 1975 if (!shost->transportt || shost->transportt->host_attrs.ac.class 1976 != &fc_host_class.class) 1977 return 0; 1978 1979 i = to_fc_internal(shost->transportt); 1980 1981 return &i->rport_attr_cont.ac == cont; 1982 } 1983 1984 1985 static void fc_vport_dev_release(struct device *dev) 1986 { 1987 struct fc_vport *vport = dev_to_vport(dev); 1988 put_device(dev->parent); /* release kobj parent */ 1989 kfree(vport); 1990 } 1991 1992 int scsi_is_fc_vport(const struct device *dev) 1993 { 1994 return dev->release == fc_vport_dev_release; 1995 } 1996 EXPORT_SYMBOL(scsi_is_fc_vport); 1997 1998 static int fc_vport_match(struct attribute_container *cont, 1999 struct device *dev) 2000 { 2001 struct fc_vport *vport; 2002 struct Scsi_Host *shost; 2003 struct fc_internal *i; 2004 2005 if (!scsi_is_fc_vport(dev)) 2006 return 0; 2007 vport = dev_to_vport(dev); 2008 2009 shost = vport_to_shost(vport); 2010 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2011 != &fc_host_class.class) 2012 return 0; 2013 2014 i = to_fc_internal(shost->transportt); 2015 return &i->vport_attr_cont.ac == cont; 2016 } 2017 2018 2019 /** 2020 * fc_timed_out - FC Transport I/O timeout intercept handler 2021 * @scmd: The SCSI command which timed out 2022 * 2023 * This routine protects against error handlers getting invoked while a 2024 * rport is in a blocked state, typically due to a temporarily loss of 2025 * connectivity. If the error handlers are allowed to proceed, requests 2026 * to abort i/o, reset the target, etc will likely fail as there is no way 2027 * to communicate with the device to perform the requested function. These 2028 * failures may result in the midlayer taking the device offline, requiring 2029 * manual intervention to restore operation. 2030 * 2031 * This routine, called whenever an i/o times out, validates the state of 2032 * the underlying rport. If the rport is blocked, it returns 2033 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2034 * Eventually, either the device will return, or devloss_tmo will fire, 2035 * and when the timeout then fires, it will be handled normally. 2036 * If the rport is not blocked, normal error handling continues. 2037 * 2038 * Notes: 2039 * This routine assumes no locks are held on entry. 2040 */ 2041 static enum blk_eh_timer_return 2042 fc_timed_out(struct scsi_cmnd *scmd) 2043 { 2044 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2045 2046 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2047 return BLK_EH_RESET_TIMER; 2048 2049 return BLK_EH_NOT_HANDLED; 2050 } 2051 2052 /* 2053 * Called by fc_user_scan to locate an rport on the shost that 2054 * matches the channel and target id, and invoke scsi_scan_target() 2055 * on the rport. 2056 */ 2057 static void 2058 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2059 { 2060 struct fc_rport *rport; 2061 unsigned long flags; 2062 2063 spin_lock_irqsave(shost->host_lock, flags); 2064 2065 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2066 if (rport->scsi_target_id == -1) 2067 continue; 2068 2069 if (rport->port_state != FC_PORTSTATE_ONLINE) 2070 continue; 2071 2072 if ((channel == rport->channel) && 2073 (id == rport->scsi_target_id)) { 2074 spin_unlock_irqrestore(shost->host_lock, flags); 2075 scsi_scan_target(&rport->dev, channel, id, lun, 1); 2076 return; 2077 } 2078 } 2079 2080 spin_unlock_irqrestore(shost->host_lock, flags); 2081 } 2082 2083 /* 2084 * Called via sysfs scan routines. Necessary, as the FC transport 2085 * wants to place all target objects below the rport object. So this 2086 * routine must invoke the scsi_scan_target() routine with the rport 2087 * object as the parent. 2088 */ 2089 static int 2090 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) 2091 { 2092 uint chlo, chhi; 2093 uint tgtlo, tgthi; 2094 2095 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2096 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2097 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2098 return -EINVAL; 2099 2100 if (channel == SCAN_WILD_CARD) { 2101 chlo = 0; 2102 chhi = shost->max_channel + 1; 2103 } else { 2104 chlo = channel; 2105 chhi = channel + 1; 2106 } 2107 2108 if (id == SCAN_WILD_CARD) { 2109 tgtlo = 0; 2110 tgthi = shost->max_id; 2111 } else { 2112 tgtlo = id; 2113 tgthi = id + 1; 2114 } 2115 2116 for ( ; chlo < chhi; chlo++) 2117 for ( ; tgtlo < tgthi; tgtlo++) 2118 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2119 2120 return 0; 2121 } 2122 2123 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, 2124 int result) 2125 { 2126 struct fc_internal *i = to_fc_internal(shost->transportt); 2127 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); 2128 } 2129 2130 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) 2131 { 2132 struct fc_internal *i = to_fc_internal(shost->transportt); 2133 return i->f->it_nexus_response(shost, nexus, result); 2134 } 2135 2136 struct scsi_transport_template * 2137 fc_attach_transport(struct fc_function_template *ft) 2138 { 2139 int count; 2140 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2141 GFP_KERNEL); 2142 2143 if (unlikely(!i)) 2144 return NULL; 2145 2146 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2147 i->t.target_attrs.ac.class = &fc_transport_class.class; 2148 i->t.target_attrs.ac.match = fc_target_match; 2149 i->t.target_size = sizeof(struct fc_starget_attrs); 2150 transport_container_register(&i->t.target_attrs); 2151 2152 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2153 i->t.host_attrs.ac.class = &fc_host_class.class; 2154 i->t.host_attrs.ac.match = fc_host_match; 2155 i->t.host_size = sizeof(struct fc_host_attrs); 2156 if (ft->get_fc_host_stats) 2157 i->t.host_attrs.statistics = &fc_statistics_group; 2158 transport_container_register(&i->t.host_attrs); 2159 2160 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2161 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2162 i->rport_attr_cont.ac.match = fc_rport_match; 2163 transport_container_register(&i->rport_attr_cont); 2164 2165 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2166 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2167 i->vport_attr_cont.ac.match = fc_vport_match; 2168 transport_container_register(&i->vport_attr_cont); 2169 2170 i->f = ft; 2171 2172 /* Transport uses the shost workq for scsi scanning */ 2173 i->t.create_work_queue = 1; 2174 2175 i->t.eh_timed_out = fc_timed_out; 2176 2177 i->t.user_scan = fc_user_scan; 2178 2179 /* target-mode drivers' functions */ 2180 i->t.tsk_mgmt_response = fc_tsk_mgmt_response; 2181 i->t.it_nexus_response = fc_it_nexus_response; 2182 2183 /* 2184 * Setup SCSI Target Attributes. 2185 */ 2186 count = 0; 2187 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2188 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2189 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2190 2191 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2192 2193 i->starget_attrs[count] = NULL; 2194 2195 2196 /* 2197 * Setup SCSI Host Attributes. 2198 */ 2199 count=0; 2200 SETUP_HOST_ATTRIBUTE_RD(node_name); 2201 SETUP_HOST_ATTRIBUTE_RD(port_name); 2202 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2203 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2204 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2205 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2206 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2207 if (ft->vport_create) { 2208 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2209 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2210 } 2211 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2212 2213 SETUP_HOST_ATTRIBUTE_RD(port_id); 2214 SETUP_HOST_ATTRIBUTE_RD(port_type); 2215 SETUP_HOST_ATTRIBUTE_RD(port_state); 2216 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2217 SETUP_HOST_ATTRIBUTE_RD(speed); 2218 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2219 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2220 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2221 2222 /* Transport-managed attributes */ 2223 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2224 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2225 if (ft->issue_fc_host_lip) 2226 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2227 if (ft->vport_create) 2228 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2229 if (ft->vport_delete) 2230 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2231 2232 BUG_ON(count > FC_HOST_NUM_ATTRS); 2233 2234 i->host_attrs[count] = NULL; 2235 2236 /* 2237 * Setup Remote Port Attributes. 2238 */ 2239 count=0; 2240 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2241 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2242 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2243 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2244 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2245 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2246 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2247 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); 2248 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2249 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2250 2251 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2252 2253 i->rport_attrs[count] = NULL; 2254 2255 /* 2256 * Setup Virtual Port Attributes. 2257 */ 2258 count=0; 2259 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2260 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2261 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2262 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2263 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2264 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2265 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2266 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2267 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2268 2269 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2270 2271 i->vport_attrs[count] = NULL; 2272 2273 return &i->t; 2274 } 2275 EXPORT_SYMBOL(fc_attach_transport); 2276 2277 void fc_release_transport(struct scsi_transport_template *t) 2278 { 2279 struct fc_internal *i = to_fc_internal(t); 2280 2281 transport_container_unregister(&i->t.target_attrs); 2282 transport_container_unregister(&i->t.host_attrs); 2283 transport_container_unregister(&i->rport_attr_cont); 2284 transport_container_unregister(&i->vport_attr_cont); 2285 2286 kfree(i); 2287 } 2288 EXPORT_SYMBOL(fc_release_transport); 2289 2290 /** 2291 * fc_queue_work - Queue work to the fc_host workqueue. 2292 * @shost: Pointer to Scsi_Host bound to fc_host. 2293 * @work: Work to queue for execution. 2294 * 2295 * Return value: 2296 * 1 - work queued for execution 2297 * 0 - work is already queued 2298 * -EINVAL - work queue doesn't exist 2299 */ 2300 static int 2301 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2302 { 2303 if (unlikely(!fc_host_work_q(shost))) { 2304 printk(KERN_ERR 2305 "ERROR: FC host '%s' attempted to queue work, " 2306 "when no workqueue created.\n", shost->hostt->name); 2307 dump_stack(); 2308 2309 return -EINVAL; 2310 } 2311 2312 return queue_work(fc_host_work_q(shost), work); 2313 } 2314 2315 /** 2316 * fc_flush_work - Flush a fc_host's workqueue. 2317 * @shost: Pointer to Scsi_Host bound to fc_host. 2318 */ 2319 static void 2320 fc_flush_work(struct Scsi_Host *shost) 2321 { 2322 if (!fc_host_work_q(shost)) { 2323 printk(KERN_ERR 2324 "ERROR: FC host '%s' attempted to flush work, " 2325 "when no workqueue created.\n", shost->hostt->name); 2326 dump_stack(); 2327 return; 2328 } 2329 2330 flush_workqueue(fc_host_work_q(shost)); 2331 } 2332 2333 /** 2334 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2335 * @shost: Pointer to Scsi_Host bound to fc_host. 2336 * @work: Work to queue for execution. 2337 * @delay: jiffies to delay the work queuing 2338 * 2339 * Return value: 2340 * 1 on success / 0 already queued / < 0 for error 2341 */ 2342 static int 2343 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2344 unsigned long delay) 2345 { 2346 if (unlikely(!fc_host_devloss_work_q(shost))) { 2347 printk(KERN_ERR 2348 "ERROR: FC host '%s' attempted to queue work, " 2349 "when no workqueue created.\n", shost->hostt->name); 2350 dump_stack(); 2351 2352 return -EINVAL; 2353 } 2354 2355 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2356 } 2357 2358 /** 2359 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2360 * @shost: Pointer to Scsi_Host bound to fc_host. 2361 */ 2362 static void 2363 fc_flush_devloss(struct Scsi_Host *shost) 2364 { 2365 if (!fc_host_devloss_work_q(shost)) { 2366 printk(KERN_ERR 2367 "ERROR: FC host '%s' attempted to flush work, " 2368 "when no workqueue created.\n", shost->hostt->name); 2369 dump_stack(); 2370 return; 2371 } 2372 2373 flush_workqueue(fc_host_devloss_work_q(shost)); 2374 } 2375 2376 2377 /** 2378 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2379 * @shost: Which &Scsi_Host 2380 * 2381 * This routine is expected to be called immediately preceding the 2382 * a driver's call to scsi_remove_host(). 2383 * 2384 * WARNING: A driver utilizing the fc_transport, which fails to call 2385 * this routine prior to scsi_remove_host(), will leave dangling 2386 * objects in /sys/class/fc_remote_ports. Access to any of these 2387 * objects can result in a system crash !!! 2388 * 2389 * Notes: 2390 * This routine assumes no locks are held on entry. 2391 */ 2392 void 2393 fc_remove_host(struct Scsi_Host *shost) 2394 { 2395 struct fc_vport *vport = NULL, *next_vport = NULL; 2396 struct fc_rport *rport = NULL, *next_rport = NULL; 2397 struct workqueue_struct *work_q; 2398 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2399 unsigned long flags; 2400 2401 spin_lock_irqsave(shost->host_lock, flags); 2402 2403 /* Remove any vports */ 2404 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) 2405 fc_queue_work(shost, &vport->vport_delete_work); 2406 2407 /* Remove any remote ports */ 2408 list_for_each_entry_safe(rport, next_rport, 2409 &fc_host->rports, peers) { 2410 list_del(&rport->peers); 2411 rport->port_state = FC_PORTSTATE_DELETED; 2412 fc_queue_work(shost, &rport->rport_delete_work); 2413 } 2414 2415 list_for_each_entry_safe(rport, next_rport, 2416 &fc_host->rport_bindings, peers) { 2417 list_del(&rport->peers); 2418 rport->port_state = FC_PORTSTATE_DELETED; 2419 fc_queue_work(shost, &rport->rport_delete_work); 2420 } 2421 2422 spin_unlock_irqrestore(shost->host_lock, flags); 2423 2424 /* flush all scan work items */ 2425 scsi_flush_work(shost); 2426 2427 /* flush all stgt delete, and rport delete work items, then kill it */ 2428 if (fc_host->work_q) { 2429 work_q = fc_host->work_q; 2430 fc_host->work_q = NULL; 2431 destroy_workqueue(work_q); 2432 } 2433 2434 /* flush all devloss work items, then kill it */ 2435 if (fc_host->devloss_work_q) { 2436 work_q = fc_host->devloss_work_q; 2437 fc_host->devloss_work_q = NULL; 2438 destroy_workqueue(work_q); 2439 } 2440 } 2441 EXPORT_SYMBOL(fc_remove_host); 2442 2443 static void fc_terminate_rport_io(struct fc_rport *rport) 2444 { 2445 struct Scsi_Host *shost = rport_to_shost(rport); 2446 struct fc_internal *i = to_fc_internal(shost->transportt); 2447 2448 /* Involve the LLDD if possible to terminate all io on the rport. */ 2449 if (i->f->terminate_rport_io) 2450 i->f->terminate_rport_io(rport); 2451 2452 /* 2453 * must unblock to flush queued IO. The caller will have set 2454 * the port_state or flags, so that fc_remote_port_chkready will 2455 * fail IO. 2456 */ 2457 scsi_target_unblock(&rport->dev); 2458 } 2459 2460 /** 2461 * fc_starget_delete - called to delete the scsi descendants of an rport 2462 * @work: remote port to be operated on. 2463 * 2464 * Deletes target and all sdevs. 2465 */ 2466 static void 2467 fc_starget_delete(struct work_struct *work) 2468 { 2469 struct fc_rport *rport = 2470 container_of(work, struct fc_rport, stgt_delete_work); 2471 2472 fc_terminate_rport_io(rport); 2473 scsi_remove_target(&rport->dev); 2474 } 2475 2476 2477 /** 2478 * fc_rport_final_delete - finish rport termination and delete it. 2479 * @work: remote port to be deleted. 2480 */ 2481 static void 2482 fc_rport_final_delete(struct work_struct *work) 2483 { 2484 struct fc_rport *rport = 2485 container_of(work, struct fc_rport, rport_delete_work); 2486 struct device *dev = &rport->dev; 2487 struct Scsi_Host *shost = rport_to_shost(rport); 2488 struct fc_internal *i = to_fc_internal(shost->transportt); 2489 unsigned long flags; 2490 int do_callback = 0; 2491 2492 /* 2493 * if a scan is pending, flush the SCSI Host work_q so that 2494 * that we can reclaim the rport scan work element. 2495 */ 2496 if (rport->flags & FC_RPORT_SCAN_PENDING) 2497 scsi_flush_work(shost); 2498 2499 fc_terminate_rport_io(rport); 2500 2501 /* 2502 * Cancel any outstanding timers. These should really exist 2503 * only when rmmod'ing the LLDD and we're asking for 2504 * immediate termination of the rports 2505 */ 2506 spin_lock_irqsave(shost->host_lock, flags); 2507 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2508 spin_unlock_irqrestore(shost->host_lock, flags); 2509 if (!cancel_delayed_work(&rport->fail_io_work)) 2510 fc_flush_devloss(shost); 2511 if (!cancel_delayed_work(&rport->dev_loss_work)) 2512 fc_flush_devloss(shost); 2513 spin_lock_irqsave(shost->host_lock, flags); 2514 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2515 } 2516 spin_unlock_irqrestore(shost->host_lock, flags); 2517 2518 /* Delete SCSI target and sdevs */ 2519 if (rport->scsi_target_id != -1) 2520 fc_starget_delete(&rport->stgt_delete_work); 2521 2522 /* 2523 * Notify the driver that the rport is now dead. The LLDD will 2524 * also guarantee that any communication to the rport is terminated 2525 * 2526 * Avoid this call if we already called it when we preserved the 2527 * rport for the binding. 2528 */ 2529 spin_lock_irqsave(shost->host_lock, flags); 2530 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 2531 (i->f->dev_loss_tmo_callbk)) { 2532 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 2533 do_callback = 1; 2534 } 2535 spin_unlock_irqrestore(shost->host_lock, flags); 2536 2537 if (do_callback) 2538 i->f->dev_loss_tmo_callbk(rport); 2539 2540 fc_bsg_remove(rport->rqst_q); 2541 2542 transport_remove_device(dev); 2543 device_del(dev); 2544 transport_destroy_device(dev); 2545 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2546 put_device(dev); /* for self-reference */ 2547 } 2548 2549 2550 /** 2551 * fc_rport_create - allocates and creates a remote FC port. 2552 * @shost: scsi host the remote port is connected to. 2553 * @channel: Channel on shost port connected to. 2554 * @ids: The world wide names, fc address, and FC4 port 2555 * roles for the remote port. 2556 * 2557 * Allocates and creates the remoter port structure, including the 2558 * class and sysfs creation. 2559 * 2560 * Notes: 2561 * This routine assumes no locks are held on entry. 2562 */ 2563 static struct fc_rport * 2564 fc_rport_create(struct Scsi_Host *shost, int channel, 2565 struct fc_rport_identifiers *ids) 2566 { 2567 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2568 struct fc_internal *fci = to_fc_internal(shost->transportt); 2569 struct fc_rport *rport; 2570 struct device *dev; 2571 unsigned long flags; 2572 int error; 2573 size_t size; 2574 2575 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 2576 rport = kzalloc(size, GFP_KERNEL); 2577 if (unlikely(!rport)) { 2578 printk(KERN_ERR "%s: allocation failure\n", __func__); 2579 return NULL; 2580 } 2581 2582 rport->maxframe_size = -1; 2583 rport->supported_classes = FC_COS_UNSPECIFIED; 2584 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 2585 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 2586 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 2587 rport->port_id = ids->port_id; 2588 rport->roles = ids->roles; 2589 rport->port_state = FC_PORTSTATE_ONLINE; 2590 if (fci->f->dd_fcrport_size) 2591 rport->dd_data = &rport[1]; 2592 rport->channel = channel; 2593 rport->fast_io_fail_tmo = -1; 2594 2595 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 2596 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 2597 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 2598 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 2599 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 2600 2601 spin_lock_irqsave(shost->host_lock, flags); 2602 2603 rport->number = fc_host->next_rport_number++; 2604 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) 2605 rport->scsi_target_id = fc_host->next_target_id++; 2606 else 2607 rport->scsi_target_id = -1; 2608 list_add_tail(&rport->peers, &fc_host->rports); 2609 get_device(&shost->shost_gendev); /* for fc_host->rport list */ 2610 2611 spin_unlock_irqrestore(shost->host_lock, flags); 2612 2613 dev = &rport->dev; 2614 device_initialize(dev); /* takes self reference */ 2615 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 2616 dev->release = fc_rport_dev_release; 2617 dev_set_name(dev, "rport-%d:%d-%d", 2618 shost->host_no, channel, rport->number); 2619 transport_setup_device(dev); 2620 2621 error = device_add(dev); 2622 if (error) { 2623 printk(KERN_ERR "FC Remote Port device_add failed\n"); 2624 goto delete_rport; 2625 } 2626 transport_add_device(dev); 2627 transport_configure_device(dev); 2628 2629 fc_bsg_rportadd(shost, rport); 2630 /* ignore any bsg add error - we just can't do sgio */ 2631 2632 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2633 /* initiate a scan of the target */ 2634 rport->flags |= FC_RPORT_SCAN_PENDING; 2635 scsi_queue_work(shost, &rport->scan_work); 2636 } 2637 2638 return rport; 2639 2640 delete_rport: 2641 transport_destroy_device(dev); 2642 spin_lock_irqsave(shost->host_lock, flags); 2643 list_del(&rport->peers); 2644 put_device(&shost->shost_gendev); /* for fc_host->rport list */ 2645 spin_unlock_irqrestore(shost->host_lock, flags); 2646 put_device(dev->parent); 2647 kfree(rport); 2648 return NULL; 2649 } 2650 2651 /** 2652 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 2653 * @shost: scsi host the remote port is connected to. 2654 * @channel: Channel on shost port connected to. 2655 * @ids: The world wide names, fc address, and FC4 port 2656 * roles for the remote port. 2657 * 2658 * The LLDD calls this routine to notify the transport of the existence 2659 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 2660 * of the port, it's FC address (port_id), and the FC4 roles that are 2661 * active for the port. 2662 * 2663 * For ports that are FCP targets (aka scsi targets), the FC transport 2664 * maintains consistent target id bindings on behalf of the LLDD. 2665 * A consistent target id binding is an assignment of a target id to 2666 * a remote port identifier, which persists while the scsi host is 2667 * attached. The remote port can disappear, then later reappear, and 2668 * it's target id assignment remains the same. This allows for shifts 2669 * in FC addressing (if binding by wwpn or wwnn) with no apparent 2670 * changes to the scsi subsystem which is based on scsi host number and 2671 * target id values. Bindings are only valid during the attachment of 2672 * the scsi host. If the host detaches, then later re-attaches, target 2673 * id bindings may change. 2674 * 2675 * This routine is responsible for returning a remote port structure. 2676 * The routine will search the list of remote ports it maintains 2677 * internally on behalf of consistent target id mappings. If found, the 2678 * remote port structure will be reused. Otherwise, a new remote port 2679 * structure will be allocated. 2680 * 2681 * Whenever a remote port is allocated, a new fc_remote_port class 2682 * device is created. 2683 * 2684 * Should not be called from interrupt context. 2685 * 2686 * Notes: 2687 * This routine assumes no locks are held on entry. 2688 */ 2689 struct fc_rport * 2690 fc_remote_port_add(struct Scsi_Host *shost, int channel, 2691 struct fc_rport_identifiers *ids) 2692 { 2693 struct fc_internal *fci = to_fc_internal(shost->transportt); 2694 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2695 struct fc_rport *rport; 2696 unsigned long flags; 2697 int match = 0; 2698 2699 /* ensure any stgt delete functions are done */ 2700 fc_flush_work(shost); 2701 2702 /* 2703 * Search the list of "active" rports, for an rport that has been 2704 * deleted, but we've held off the real delete while the target 2705 * is in a "blocked" state. 2706 */ 2707 spin_lock_irqsave(shost->host_lock, flags); 2708 2709 list_for_each_entry(rport, &fc_host->rports, peers) { 2710 2711 if ((rport->port_state == FC_PORTSTATE_BLOCKED) && 2712 (rport->channel == channel)) { 2713 2714 switch (fc_host->tgtid_bind_type) { 2715 case FC_TGTID_BIND_BY_WWPN: 2716 case FC_TGTID_BIND_NONE: 2717 if (rport->port_name == ids->port_name) 2718 match = 1; 2719 break; 2720 case FC_TGTID_BIND_BY_WWNN: 2721 if (rport->node_name == ids->node_name) 2722 match = 1; 2723 break; 2724 case FC_TGTID_BIND_BY_ID: 2725 if (rport->port_id == ids->port_id) 2726 match = 1; 2727 break; 2728 } 2729 2730 if (match) { 2731 2732 memcpy(&rport->node_name, &ids->node_name, 2733 sizeof(rport->node_name)); 2734 memcpy(&rport->port_name, &ids->port_name, 2735 sizeof(rport->port_name)); 2736 rport->port_id = ids->port_id; 2737 2738 rport->port_state = FC_PORTSTATE_ONLINE; 2739 rport->roles = ids->roles; 2740 2741 spin_unlock_irqrestore(shost->host_lock, flags); 2742 2743 if (fci->f->dd_fcrport_size) 2744 memset(rport->dd_data, 0, 2745 fci->f->dd_fcrport_size); 2746 2747 /* 2748 * If we were not a target, cancel the 2749 * io terminate and rport timers, and 2750 * we're done. 2751 * 2752 * If we were a target, but our new role 2753 * doesn't indicate a target, leave the 2754 * timers running expecting the role to 2755 * change as the target fully logs in. If 2756 * it doesn't, the target will be torn down. 2757 * 2758 * If we were a target, and our role shows 2759 * we're still a target, cancel the timers 2760 * and kick off a scan. 2761 */ 2762 2763 /* was a target, not in roles */ 2764 if ((rport->scsi_target_id != -1) && 2765 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 2766 return rport; 2767 2768 /* 2769 * Stop the fail io and dev_loss timers. 2770 * If they flush, the port_state will 2771 * be checked and will NOOP the function. 2772 */ 2773 if (!cancel_delayed_work(&rport->fail_io_work)) 2774 fc_flush_devloss(shost); 2775 if (!cancel_delayed_work(&rport->dev_loss_work)) 2776 fc_flush_devloss(shost); 2777 2778 spin_lock_irqsave(shost->host_lock, flags); 2779 2780 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 2781 FC_RPORT_DEVLOSS_PENDING | 2782 FC_RPORT_DEVLOSS_CALLBK_DONE); 2783 2784 /* if target, initiate a scan */ 2785 if (rport->scsi_target_id != -1) { 2786 rport->flags |= FC_RPORT_SCAN_PENDING; 2787 scsi_queue_work(shost, 2788 &rport->scan_work); 2789 spin_unlock_irqrestore(shost->host_lock, 2790 flags); 2791 scsi_target_unblock(&rport->dev); 2792 } else 2793 spin_unlock_irqrestore(shost->host_lock, 2794 flags); 2795 2796 fc_bsg_goose_queue(rport); 2797 2798 return rport; 2799 } 2800 } 2801 } 2802 2803 /* 2804 * Search the bindings array 2805 * Note: if never a FCP target, you won't be on this list 2806 */ 2807 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 2808 2809 /* search for a matching consistent binding */ 2810 2811 list_for_each_entry(rport, &fc_host->rport_bindings, 2812 peers) { 2813 if (rport->channel != channel) 2814 continue; 2815 2816 switch (fc_host->tgtid_bind_type) { 2817 case FC_TGTID_BIND_BY_WWPN: 2818 if (rport->port_name == ids->port_name) 2819 match = 1; 2820 break; 2821 case FC_TGTID_BIND_BY_WWNN: 2822 if (rport->node_name == ids->node_name) 2823 match = 1; 2824 break; 2825 case FC_TGTID_BIND_BY_ID: 2826 if (rport->port_id == ids->port_id) 2827 match = 1; 2828 break; 2829 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 2830 break; 2831 } 2832 2833 if (match) { 2834 list_move_tail(&rport->peers, &fc_host->rports); 2835 break; 2836 } 2837 } 2838 2839 if (match) { 2840 memcpy(&rport->node_name, &ids->node_name, 2841 sizeof(rport->node_name)); 2842 memcpy(&rport->port_name, &ids->port_name, 2843 sizeof(rport->port_name)); 2844 rport->port_id = ids->port_id; 2845 rport->roles = ids->roles; 2846 rport->port_state = FC_PORTSTATE_ONLINE; 2847 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 2848 2849 if (fci->f->dd_fcrport_size) 2850 memset(rport->dd_data, 0, 2851 fci->f->dd_fcrport_size); 2852 2853 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 2854 /* initiate a scan of the target */ 2855 rport->flags |= FC_RPORT_SCAN_PENDING; 2856 scsi_queue_work(shost, &rport->scan_work); 2857 spin_unlock_irqrestore(shost->host_lock, flags); 2858 scsi_target_unblock(&rport->dev); 2859 } else 2860 spin_unlock_irqrestore(shost->host_lock, flags); 2861 2862 return rport; 2863 } 2864 } 2865 2866 spin_unlock_irqrestore(shost->host_lock, flags); 2867 2868 /* No consistent binding found - create new remote port entry */ 2869 rport = fc_rport_create(shost, channel, ids); 2870 2871 return rport; 2872 } 2873 EXPORT_SYMBOL(fc_remote_port_add); 2874 2875 2876 /** 2877 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 2878 * @rport: The remote port that no longer exists 2879 * 2880 * The LLDD calls this routine to notify the transport that a remote 2881 * port is no longer part of the topology. Note: Although a port 2882 * may no longer be part of the topology, it may persist in the remote 2883 * ports displayed by the fc_host. We do this under 2 conditions: 2884 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 2885 * This allows the port to temporarily disappear, then reappear without 2886 * disrupting the SCSI device tree attached to it. During the "blocked" 2887 * period the port will still exist. 2888 * 2) If the port was a scsi target and disappears for longer than we 2889 * expect, we'll delete the port and the tear down the SCSI device tree 2890 * attached to it. However, we want to semi-persist the target id assigned 2891 * to that port if it eventually does exist. The port structure will 2892 * remain (although with minimal information) so that the target id 2893 * bindings remails. 2894 * 2895 * If the remote port is not an FCP Target, it will be fully torn down 2896 * and deallocated, including the fc_remote_port class device. 2897 * 2898 * If the remote port is an FCP Target, the port will be placed in a 2899 * temporary blocked state. From the LLDD's perspective, the rport no 2900 * longer exists. From the SCSI midlayer's perspective, the SCSI target 2901 * exists, but all sdevs on it are blocked from further I/O. The following 2902 * is then expected. 2903 * 2904 * If the remote port does not return (signaled by a LLDD call to 2905 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 2906 * scsi target is removed - killing all outstanding i/o and removing the 2907 * scsi devices attached ot it. The port structure will be marked Not 2908 * Present and be partially cleared, leaving only enough information to 2909 * recognize the remote port relative to the scsi target id binding if 2910 * it later appears. The port will remain as long as there is a valid 2911 * binding (e.g. until the user changes the binding type or unloads the 2912 * scsi host with the binding). 2913 * 2914 * If the remote port returns within the dev_loss_tmo value (and matches 2915 * according to the target id binding type), the port structure will be 2916 * reused. If it is no longer a SCSI target, the target will be torn 2917 * down. If it continues to be a SCSI target, then the target will be 2918 * unblocked (allowing i/o to be resumed), and a scan will be activated 2919 * to ensure that all luns are detected. 2920 * 2921 * Called from normal process context only - cannot be called from interrupt. 2922 * 2923 * Notes: 2924 * This routine assumes no locks are held on entry. 2925 */ 2926 void 2927 fc_remote_port_delete(struct fc_rport *rport) 2928 { 2929 struct Scsi_Host *shost = rport_to_shost(rport); 2930 unsigned long timeout = rport->dev_loss_tmo; 2931 unsigned long flags; 2932 2933 /* 2934 * No need to flush the fc_host work_q's, as all adds are synchronous. 2935 * 2936 * We do need to reclaim the rport scan work element, so eventually 2937 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 2938 * there's still a scan pending. 2939 */ 2940 2941 spin_lock_irqsave(shost->host_lock, flags); 2942 2943 if (rport->port_state != FC_PORTSTATE_ONLINE) { 2944 spin_unlock_irqrestore(shost->host_lock, flags); 2945 return; 2946 } 2947 2948 /* 2949 * In the past, we if this was not an FCP-Target, we would 2950 * unconditionally just jump to deleting the rport. 2951 * However, rports can be used as node containers by the LLDD, 2952 * and its not appropriate to just terminate the rport at the 2953 * first sign of a loss in connectivity. The LLDD may want to 2954 * send ELS traffic to re-validate the login. If the rport is 2955 * immediately deleted, it makes it inappropriate for a node 2956 * container. 2957 * So... we now unconditionally wait dev_loss_tmo before 2958 * destroying an rport. 2959 */ 2960 2961 rport->port_state = FC_PORTSTATE_BLOCKED; 2962 2963 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 2964 2965 spin_unlock_irqrestore(shost->host_lock, flags); 2966 2967 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && 2968 shost->active_mode & MODE_TARGET) 2969 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); 2970 2971 scsi_target_block(&rport->dev); 2972 2973 /* see if we need to kill io faster than waiting for device loss */ 2974 if ((rport->fast_io_fail_tmo != -1) && 2975 (rport->fast_io_fail_tmo < timeout)) 2976 fc_queue_devloss_work(shost, &rport->fail_io_work, 2977 rport->fast_io_fail_tmo * HZ); 2978 2979 /* cap the length the devices can be blocked until they are deleted */ 2980 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 2981 } 2982 EXPORT_SYMBOL(fc_remote_port_delete); 2983 2984 /** 2985 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 2986 * @rport: The remote port that changed. 2987 * @roles: New roles for this port. 2988 * 2989 * Description: The LLDD calls this routine to notify the transport that the 2990 * roles on a remote port may have changed. The largest effect of this is 2991 * if a port now becomes a FCP Target, it must be allocated a 2992 * scsi target id. If the port is no longer a FCP target, any 2993 * scsi target id value assigned to it will persist in case the 2994 * role changes back to include FCP Target. No changes in the scsi 2995 * midlayer will be invoked if the role changes (in the expectation 2996 * that the role will be resumed. If it doesn't normal error processing 2997 * will take place). 2998 * 2999 * Should not be called from interrupt context. 3000 * 3001 * Notes: 3002 * This routine assumes no locks are held on entry. 3003 */ 3004 void 3005 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3006 { 3007 struct Scsi_Host *shost = rport_to_shost(rport); 3008 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3009 unsigned long flags; 3010 int create = 0; 3011 int ret; 3012 3013 spin_lock_irqsave(shost->host_lock, flags); 3014 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3015 if (rport->scsi_target_id == -1) { 3016 rport->scsi_target_id = fc_host->next_target_id++; 3017 create = 1; 3018 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3019 create = 1; 3020 } else if (shost->active_mode & MODE_TARGET) { 3021 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, 3022 (char *)&rport->node_name); 3023 if (ret) 3024 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", 3025 ret); 3026 } 3027 3028 rport->roles = roles; 3029 3030 spin_unlock_irqrestore(shost->host_lock, flags); 3031 3032 if (create) { 3033 /* 3034 * There may have been a delete timer running on the 3035 * port. Ensure that it is cancelled as we now know 3036 * the port is an FCP Target. 3037 * Note: we know the rport is exists and in an online 3038 * state as the LLDD would not have had an rport 3039 * reference to pass us. 3040 * 3041 * Take no action on the del_timer failure as the state 3042 * machine state change will validate the 3043 * transaction. 3044 */ 3045 if (!cancel_delayed_work(&rport->fail_io_work)) 3046 fc_flush_devloss(shost); 3047 if (!cancel_delayed_work(&rport->dev_loss_work)) 3048 fc_flush_devloss(shost); 3049 3050 spin_lock_irqsave(shost->host_lock, flags); 3051 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3052 FC_RPORT_DEVLOSS_PENDING); 3053 spin_unlock_irqrestore(shost->host_lock, flags); 3054 3055 /* ensure any stgt delete functions are done */ 3056 fc_flush_work(shost); 3057 3058 /* initiate a scan of the target */ 3059 spin_lock_irqsave(shost->host_lock, flags); 3060 rport->flags |= FC_RPORT_SCAN_PENDING; 3061 scsi_queue_work(shost, &rport->scan_work); 3062 spin_unlock_irqrestore(shost->host_lock, flags); 3063 scsi_target_unblock(&rport->dev); 3064 } 3065 } 3066 EXPORT_SYMBOL(fc_remote_port_rolechg); 3067 3068 /** 3069 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3070 * @work: rport target that failed to reappear in the allotted time. 3071 * 3072 * Description: An attempt to delete a remote port blocks, and if it fails 3073 * to return in the allotted time this gets called. 3074 */ 3075 static void 3076 fc_timeout_deleted_rport(struct work_struct *work) 3077 { 3078 struct fc_rport *rport = 3079 container_of(work, struct fc_rport, dev_loss_work.work); 3080 struct Scsi_Host *shost = rport_to_shost(rport); 3081 struct fc_internal *i = to_fc_internal(shost->transportt); 3082 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3083 unsigned long flags; 3084 int do_callback = 0; 3085 3086 spin_lock_irqsave(shost->host_lock, flags); 3087 3088 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3089 3090 /* 3091 * If the port is ONLINE, then it came back. If it was a SCSI 3092 * target, validate it still is. If not, tear down the 3093 * scsi_target on it. 3094 */ 3095 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3096 (rport->scsi_target_id != -1) && 3097 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3098 dev_printk(KERN_ERR, &rport->dev, 3099 "blocked FC remote port time out: no longer" 3100 " a FCP target, removing starget\n"); 3101 spin_unlock_irqrestore(shost->host_lock, flags); 3102 scsi_target_unblock(&rport->dev); 3103 fc_queue_work(shost, &rport->stgt_delete_work); 3104 return; 3105 } 3106 3107 /* NOOP state - we're flushing workq's */ 3108 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3109 spin_unlock_irqrestore(shost->host_lock, flags); 3110 dev_printk(KERN_ERR, &rport->dev, 3111 "blocked FC remote port time out: leaving" 3112 " rport%s alone\n", 3113 (rport->scsi_target_id != -1) ? " and starget" : ""); 3114 return; 3115 } 3116 3117 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3118 (rport->scsi_target_id == -1)) { 3119 list_del(&rport->peers); 3120 rport->port_state = FC_PORTSTATE_DELETED; 3121 dev_printk(KERN_ERR, &rport->dev, 3122 "blocked FC remote port time out: removing" 3123 " rport%s\n", 3124 (rport->scsi_target_id != -1) ? " and starget" : ""); 3125 fc_queue_work(shost, &rport->rport_delete_work); 3126 spin_unlock_irqrestore(shost->host_lock, flags); 3127 return; 3128 } 3129 3130 dev_printk(KERN_ERR, &rport->dev, 3131 "blocked FC remote port time out: removing target and " 3132 "saving binding\n"); 3133 3134 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3135 3136 /* 3137 * Note: We do not remove or clear the hostdata area. This allows 3138 * host-specific target data to persist along with the 3139 * scsi_target_id. It's up to the host to manage it's hostdata area. 3140 */ 3141 3142 /* 3143 * Reinitialize port attributes that may change if the port comes back. 3144 */ 3145 rport->maxframe_size = -1; 3146 rport->supported_classes = FC_COS_UNSPECIFIED; 3147 rport->roles = FC_PORT_ROLE_UNKNOWN; 3148 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3149 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3150 3151 /* 3152 * Pre-emptively kill I/O rather than waiting for the work queue 3153 * item to teardown the starget. (FCOE libFC folks prefer this 3154 * and to have the rport_port_id still set when it's done). 3155 */ 3156 spin_unlock_irqrestore(shost->host_lock, flags); 3157 fc_terminate_rport_io(rport); 3158 3159 spin_lock_irqsave(shost->host_lock, flags); 3160 3161 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3162 3163 /* remove the identifiers that aren't used in the consisting binding */ 3164 switch (fc_host->tgtid_bind_type) { 3165 case FC_TGTID_BIND_BY_WWPN: 3166 rport->node_name = -1; 3167 rport->port_id = -1; 3168 break; 3169 case FC_TGTID_BIND_BY_WWNN: 3170 rport->port_name = -1; 3171 rport->port_id = -1; 3172 break; 3173 case FC_TGTID_BIND_BY_ID: 3174 rport->node_name = -1; 3175 rport->port_name = -1; 3176 break; 3177 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3178 break; 3179 } 3180 3181 /* 3182 * As this only occurs if the remote port (scsi target) 3183 * went away and didn't come back - we'll remove 3184 * all attached scsi devices. 3185 */ 3186 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3187 fc_queue_work(shost, &rport->stgt_delete_work); 3188 3189 do_callback = 1; 3190 } 3191 3192 spin_unlock_irqrestore(shost->host_lock, flags); 3193 3194 /* 3195 * Notify the driver that the rport is now dead. The LLDD will 3196 * also guarantee that any communication to the rport is terminated 3197 * 3198 * Note: we set the CALLBK_DONE flag above to correspond 3199 */ 3200 if (do_callback && i->f->dev_loss_tmo_callbk) 3201 i->f->dev_loss_tmo_callbk(rport); 3202 } 3203 3204 3205 /** 3206 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3207 * @work: rport to terminate io on. 3208 * 3209 * Notes: Only requests the failure of the io, not that all are flushed 3210 * prior to returning. 3211 */ 3212 static void 3213 fc_timeout_fail_rport_io(struct work_struct *work) 3214 { 3215 struct fc_rport *rport = 3216 container_of(work, struct fc_rport, fail_io_work.work); 3217 3218 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3219 return; 3220 3221 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3222 fc_terminate_rport_io(rport); 3223 } 3224 3225 /** 3226 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3227 * @work: remote port to be scanned. 3228 */ 3229 static void 3230 fc_scsi_scan_rport(struct work_struct *work) 3231 { 3232 struct fc_rport *rport = 3233 container_of(work, struct fc_rport, scan_work); 3234 struct Scsi_Host *shost = rport_to_shost(rport); 3235 struct fc_internal *i = to_fc_internal(shost->transportt); 3236 unsigned long flags; 3237 3238 if ((rport->port_state == FC_PORTSTATE_ONLINE) && 3239 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3240 !(i->f->disable_target_scan)) { 3241 scsi_scan_target(&rport->dev, rport->channel, 3242 rport->scsi_target_id, SCAN_WILD_CARD, 1); 3243 } 3244 3245 spin_lock_irqsave(shost->host_lock, flags); 3246 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3247 spin_unlock_irqrestore(shost->host_lock, flags); 3248 } 3249 3250 /** 3251 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3252 * @cmnd: SCSI command that scsi_eh is trying to recover 3253 * 3254 * This routine can be called from a FC LLD scsi_eh callback. It 3255 * blocks the scsi_eh thread until the fc_rport leaves the 3256 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3257 * necessary to avoid the scsi_eh failing recovery actions for blocked 3258 * rports which would lead to offlined SCSI devices. 3259 * 3260 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3261 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3262 * passed back to scsi_eh. 3263 */ 3264 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3265 { 3266 struct Scsi_Host *shost = cmnd->device->host; 3267 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3268 unsigned long flags; 3269 3270 spin_lock_irqsave(shost->host_lock, flags); 3271 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3272 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3273 spin_unlock_irqrestore(shost->host_lock, flags); 3274 msleep(1000); 3275 spin_lock_irqsave(shost->host_lock, flags); 3276 } 3277 spin_unlock_irqrestore(shost->host_lock, flags); 3278 3279 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3280 return FAST_IO_FAIL; 3281 3282 return 0; 3283 } 3284 EXPORT_SYMBOL(fc_block_scsi_eh); 3285 3286 /** 3287 * fc_vport_setup - allocates and creates a FC virtual port. 3288 * @shost: scsi host the virtual port is connected to. 3289 * @channel: Channel on shost port connected to. 3290 * @pdev: parent device for vport 3291 * @ids: The world wide names, FC4 port roles, etc for 3292 * the virtual port. 3293 * @ret_vport: The pointer to the created vport. 3294 * 3295 * Allocates and creates the vport structure, calls the parent host 3296 * to instantiate the vport, the completes w/ class and sysfs creation. 3297 * 3298 * Notes: 3299 * This routine assumes no locks are held on entry. 3300 */ 3301 static int 3302 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3303 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3304 { 3305 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3306 struct fc_internal *fci = to_fc_internal(shost->transportt); 3307 struct fc_vport *vport; 3308 struct device *dev; 3309 unsigned long flags; 3310 size_t size; 3311 int error; 3312 3313 *ret_vport = NULL; 3314 3315 if ( ! fci->f->vport_create) 3316 return -ENOENT; 3317 3318 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3319 vport = kzalloc(size, GFP_KERNEL); 3320 if (unlikely(!vport)) { 3321 printk(KERN_ERR "%s: allocation failure\n", __func__); 3322 return -ENOMEM; 3323 } 3324 3325 vport->vport_state = FC_VPORT_UNKNOWN; 3326 vport->vport_last_state = FC_VPORT_UNKNOWN; 3327 vport->node_name = ids->node_name; 3328 vport->port_name = ids->port_name; 3329 vport->roles = ids->roles; 3330 vport->vport_type = ids->vport_type; 3331 if (fci->f->dd_fcvport_size) 3332 vport->dd_data = &vport[1]; 3333 vport->shost = shost; 3334 vport->channel = channel; 3335 vport->flags = FC_VPORT_CREATING; 3336 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3337 3338 spin_lock_irqsave(shost->host_lock, flags); 3339 3340 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3341 spin_unlock_irqrestore(shost->host_lock, flags); 3342 kfree(vport); 3343 return -ENOSPC; 3344 } 3345 fc_host->npiv_vports_inuse++; 3346 vport->number = fc_host->next_vport_number++; 3347 list_add_tail(&vport->peers, &fc_host->vports); 3348 get_device(&shost->shost_gendev); /* for fc_host->vport list */ 3349 3350 spin_unlock_irqrestore(shost->host_lock, flags); 3351 3352 dev = &vport->dev; 3353 device_initialize(dev); /* takes self reference */ 3354 dev->parent = get_device(pdev); /* takes parent reference */ 3355 dev->release = fc_vport_dev_release; 3356 dev_set_name(dev, "vport-%d:%d-%d", 3357 shost->host_no, channel, vport->number); 3358 transport_setup_device(dev); 3359 3360 error = device_add(dev); 3361 if (error) { 3362 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3363 goto delete_vport; 3364 } 3365 transport_add_device(dev); 3366 transport_configure_device(dev); 3367 3368 error = fci->f->vport_create(vport, ids->disable); 3369 if (error) { 3370 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3371 goto delete_vport_all; 3372 } 3373 3374 /* 3375 * if the parent isn't the physical adapter's Scsi_Host, ensure 3376 * the Scsi_Host at least contains ia symlink to the vport. 3377 */ 3378 if (pdev != &shost->shost_gendev) { 3379 error = sysfs_create_link(&shost->shost_gendev.kobj, 3380 &dev->kobj, dev_name(dev)); 3381 if (error) 3382 printk(KERN_ERR 3383 "%s: Cannot create vport symlinks for " 3384 "%s, err=%d\n", 3385 __func__, dev_name(dev), error); 3386 } 3387 spin_lock_irqsave(shost->host_lock, flags); 3388 vport->flags &= ~FC_VPORT_CREATING; 3389 spin_unlock_irqrestore(shost->host_lock, flags); 3390 3391 dev_printk(KERN_NOTICE, pdev, 3392 "%s created via shost%d channel %d\n", dev_name(dev), 3393 shost->host_no, channel); 3394 3395 *ret_vport = vport; 3396 3397 return 0; 3398 3399 delete_vport_all: 3400 transport_remove_device(dev); 3401 device_del(dev); 3402 delete_vport: 3403 transport_destroy_device(dev); 3404 spin_lock_irqsave(shost->host_lock, flags); 3405 list_del(&vport->peers); 3406 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3407 fc_host->npiv_vports_inuse--; 3408 spin_unlock_irqrestore(shost->host_lock, flags); 3409 put_device(dev->parent); 3410 kfree(vport); 3411 3412 return error; 3413 } 3414 3415 /** 3416 * fc_vport_create - Admin App or LLDD requests creation of a vport 3417 * @shost: scsi host the virtual port is connected to. 3418 * @channel: channel on shost port connected to. 3419 * @ids: The world wide names, FC4 port roles, etc for 3420 * the virtual port. 3421 * 3422 * Notes: 3423 * This routine assumes no locks are held on entry. 3424 */ 3425 struct fc_vport * 3426 fc_vport_create(struct Scsi_Host *shost, int channel, 3427 struct fc_vport_identifiers *ids) 3428 { 3429 int stat; 3430 struct fc_vport *vport; 3431 3432 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3433 ids, &vport); 3434 return stat ? NULL : vport; 3435 } 3436 EXPORT_SYMBOL(fc_vport_create); 3437 3438 /** 3439 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3440 * @vport: fc_vport to be terminated 3441 * 3442 * Calls the LLDD vport_delete() function, then deallocates and removes 3443 * the vport from the shost and object tree. 3444 * 3445 * Notes: 3446 * This routine assumes no locks are held on entry. 3447 */ 3448 int 3449 fc_vport_terminate(struct fc_vport *vport) 3450 { 3451 struct Scsi_Host *shost = vport_to_shost(vport); 3452 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3453 struct fc_internal *i = to_fc_internal(shost->transportt); 3454 struct device *dev = &vport->dev; 3455 unsigned long flags; 3456 int stat; 3457 3458 if (i->f->vport_delete) 3459 stat = i->f->vport_delete(vport); 3460 else 3461 stat = -ENOENT; 3462 3463 spin_lock_irqsave(shost->host_lock, flags); 3464 vport->flags &= ~FC_VPORT_DELETING; 3465 if (!stat) { 3466 vport->flags |= FC_VPORT_DELETED; 3467 list_del(&vport->peers); 3468 fc_host->npiv_vports_inuse--; 3469 put_device(&shost->shost_gendev); /* for fc_host->vport list */ 3470 } 3471 spin_unlock_irqrestore(shost->host_lock, flags); 3472 3473 if (stat) 3474 return stat; 3475 3476 if (dev->parent != &shost->shost_gendev) 3477 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 3478 transport_remove_device(dev); 3479 device_del(dev); 3480 transport_destroy_device(dev); 3481 3482 /* 3483 * Removing our self-reference should mean our 3484 * release function gets called, which will drop the remaining 3485 * parent reference and free the data structure. 3486 */ 3487 put_device(dev); /* for self-reference */ 3488 3489 return 0; /* SUCCESS */ 3490 } 3491 EXPORT_SYMBOL(fc_vport_terminate); 3492 3493 /** 3494 * fc_vport_sched_delete - workq-based delete request for a vport 3495 * @work: vport to be deleted. 3496 */ 3497 static void 3498 fc_vport_sched_delete(struct work_struct *work) 3499 { 3500 struct fc_vport *vport = 3501 container_of(work, struct fc_vport, vport_delete_work); 3502 int stat; 3503 3504 stat = fc_vport_terminate(vport); 3505 if (stat) 3506 dev_printk(KERN_ERR, vport->dev.parent, 3507 "%s: %s could not be deleted created via " 3508 "shost%d channel %d - error %d\n", __func__, 3509 dev_name(&vport->dev), vport->shost->host_no, 3510 vport->channel, stat); 3511 } 3512 3513 3514 /* 3515 * BSG support 3516 */ 3517 3518 3519 /** 3520 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job 3521 * @job: fc_bsg_job that is to be torn down 3522 */ 3523 static void 3524 fc_destroy_bsgjob(struct fc_bsg_job *job) 3525 { 3526 unsigned long flags; 3527 3528 spin_lock_irqsave(&job->job_lock, flags); 3529 if (job->ref_cnt) { 3530 spin_unlock_irqrestore(&job->job_lock, flags); 3531 return; 3532 } 3533 spin_unlock_irqrestore(&job->job_lock, flags); 3534 3535 put_device(job->dev); /* release reference for the request */ 3536 3537 kfree(job->request_payload.sg_list); 3538 kfree(job->reply_payload.sg_list); 3539 kfree(job); 3540 } 3541 3542 /** 3543 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has 3544 * completed 3545 * @job: fc_bsg_job that is complete 3546 */ 3547 static void 3548 fc_bsg_jobdone(struct fc_bsg_job *job) 3549 { 3550 struct request *req = job->req; 3551 struct request *rsp = req->next_rq; 3552 int err; 3553 3554 err = job->req->errors = job->reply->result; 3555 3556 if (err < 0) 3557 /* we're only returning the result field in the reply */ 3558 job->req->sense_len = sizeof(uint32_t); 3559 else 3560 job->req->sense_len = job->reply_len; 3561 3562 /* we assume all request payload was transferred, residual == 0 */ 3563 req->resid_len = 0; 3564 3565 if (rsp) { 3566 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); 3567 3568 /* set reply (bidi) residual */ 3569 rsp->resid_len -= min(job->reply->reply_payload_rcv_len, 3570 rsp->resid_len); 3571 } 3572 blk_complete_request(req); 3573 } 3574 3575 /** 3576 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests 3577 * @rq: BSG request that holds the job to be destroyed 3578 */ 3579 static void fc_bsg_softirq_done(struct request *rq) 3580 { 3581 struct fc_bsg_job *job = rq->special; 3582 unsigned long flags; 3583 3584 spin_lock_irqsave(&job->job_lock, flags); 3585 job->state_flags |= FC_RQST_STATE_DONE; 3586 job->ref_cnt--; 3587 spin_unlock_irqrestore(&job->job_lock, flags); 3588 3589 blk_end_request_all(rq, rq->errors); 3590 fc_destroy_bsgjob(job); 3591 } 3592 3593 /** 3594 * fc_bsg_job_timeout - handler for when a bsg request timesout 3595 * @req: request that timed out 3596 */ 3597 static enum blk_eh_timer_return 3598 fc_bsg_job_timeout(struct request *req) 3599 { 3600 struct fc_bsg_job *job = (void *) req->special; 3601 struct Scsi_Host *shost = job->shost; 3602 struct fc_internal *i = to_fc_internal(shost->transportt); 3603 unsigned long flags; 3604 int err = 0, done = 0; 3605 3606 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) 3607 return BLK_EH_RESET_TIMER; 3608 3609 spin_lock_irqsave(&job->job_lock, flags); 3610 if (job->state_flags & FC_RQST_STATE_DONE) 3611 done = 1; 3612 else 3613 job->ref_cnt++; 3614 spin_unlock_irqrestore(&job->job_lock, flags); 3615 3616 if (!done && i->f->bsg_timeout) { 3617 /* call LLDD to abort the i/o as it has timed out */ 3618 err = i->f->bsg_timeout(job); 3619 if (err == -EAGAIN) { 3620 job->ref_cnt--; 3621 return BLK_EH_RESET_TIMER; 3622 } else if (err) 3623 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 3624 "abort failed with status %d\n", err); 3625 } 3626 3627 /* the blk_end_sync_io() doesn't check the error */ 3628 if (done) 3629 return BLK_EH_NOT_HANDLED; 3630 else 3631 return BLK_EH_HANDLED; 3632 } 3633 3634 static int 3635 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) 3636 { 3637 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); 3638 3639 BUG_ON(!req->nr_phys_segments); 3640 3641 buf->sg_list = kzalloc(sz, GFP_KERNEL); 3642 if (!buf->sg_list) 3643 return -ENOMEM; 3644 sg_init_table(buf->sg_list, req->nr_phys_segments); 3645 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); 3646 buf->payload_len = blk_rq_bytes(req); 3647 return 0; 3648 } 3649 3650 3651 /** 3652 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the 3653 * bsg request 3654 * @shost: SCSI Host corresponding to the bsg object 3655 * @rport: (optional) FC Remote Port corresponding to the bsg object 3656 * @req: BSG request that needs a job structure 3657 */ 3658 static int 3659 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, 3660 struct request *req) 3661 { 3662 struct fc_internal *i = to_fc_internal(shost->transportt); 3663 struct request *rsp = req->next_rq; 3664 struct fc_bsg_job *job; 3665 int ret; 3666 3667 BUG_ON(req->special); 3668 3669 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, 3670 GFP_KERNEL); 3671 if (!job) 3672 return -ENOMEM; 3673 3674 /* 3675 * Note: this is a bit silly. 3676 * The request gets formatted as a SGIO v4 ioctl request, which 3677 * then gets reformatted as a blk request, which then gets 3678 * reformatted as a fc bsg request. And on completion, we have 3679 * to wrap return results such that SGIO v4 thinks it was a scsi 3680 * status. I hope this was all worth it. 3681 */ 3682 3683 req->special = job; 3684 job->shost = shost; 3685 job->rport = rport; 3686 job->req = req; 3687 if (i->f->dd_bsg_size) 3688 job->dd_data = (void *)&job[1]; 3689 spin_lock_init(&job->job_lock); 3690 job->request = (struct fc_bsg_request *)req->cmd; 3691 job->request_len = req->cmd_len; 3692 job->reply = req->sense; 3693 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer 3694 * allocated */ 3695 if (req->bio) { 3696 ret = fc_bsg_map_buffer(&job->request_payload, req); 3697 if (ret) 3698 goto failjob_rls_job; 3699 } 3700 if (rsp && rsp->bio) { 3701 ret = fc_bsg_map_buffer(&job->reply_payload, rsp); 3702 if (ret) 3703 goto failjob_rls_rqst_payload; 3704 } 3705 job->job_done = fc_bsg_jobdone; 3706 if (rport) 3707 job->dev = &rport->dev; 3708 else 3709 job->dev = &shost->shost_gendev; 3710 get_device(job->dev); /* take a reference for the request */ 3711 3712 job->ref_cnt = 1; 3713 3714 return 0; 3715 3716 3717 failjob_rls_rqst_payload: 3718 kfree(job->request_payload.sg_list); 3719 failjob_rls_job: 3720 kfree(job); 3721 return -ENOMEM; 3722 } 3723 3724 3725 enum fc_dispatch_result { 3726 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ 3727 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ 3728 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ 3729 }; 3730 3731 3732 /** 3733 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 3734 * @q: fc host request queue 3735 * @shost: scsi host rport attached to 3736 * @job: bsg job to be processed 3737 */ 3738 static enum fc_dispatch_result 3739 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3740 struct fc_bsg_job *job) 3741 { 3742 struct fc_internal *i = to_fc_internal(shost->transportt); 3743 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3744 int ret; 3745 3746 /* Validate the host command */ 3747 switch (job->request->msgcode) { 3748 case FC_BSG_HST_ADD_RPORT: 3749 cmdlen += sizeof(struct fc_bsg_host_add_rport); 3750 break; 3751 3752 case FC_BSG_HST_DEL_RPORT: 3753 cmdlen += sizeof(struct fc_bsg_host_del_rport); 3754 break; 3755 3756 case FC_BSG_HST_ELS_NOLOGIN: 3757 cmdlen += sizeof(struct fc_bsg_host_els); 3758 /* there better be a xmt and rcv payloads */ 3759 if ((!job->request_payload.payload_len) || 3760 (!job->reply_payload.payload_len)) { 3761 ret = -EINVAL; 3762 goto fail_host_msg; 3763 } 3764 break; 3765 3766 case FC_BSG_HST_CT: 3767 cmdlen += sizeof(struct fc_bsg_host_ct); 3768 /* there better be xmt and rcv payloads */ 3769 if ((!job->request_payload.payload_len) || 3770 (!job->reply_payload.payload_len)) { 3771 ret = -EINVAL; 3772 goto fail_host_msg; 3773 } 3774 break; 3775 3776 case FC_BSG_HST_VENDOR: 3777 cmdlen += sizeof(struct fc_bsg_host_vendor); 3778 if ((shost->hostt->vendor_id == 0L) || 3779 (job->request->rqst_data.h_vendor.vendor_id != 3780 shost->hostt->vendor_id)) { 3781 ret = -ESRCH; 3782 goto fail_host_msg; 3783 } 3784 break; 3785 3786 default: 3787 ret = -EBADR; 3788 goto fail_host_msg; 3789 } 3790 3791 /* check if we really have all the request data needed */ 3792 if (job->request_len < cmdlen) { 3793 ret = -ENOMSG; 3794 goto fail_host_msg; 3795 } 3796 3797 ret = i->f->bsg_request(job); 3798 if (!ret) 3799 return FC_DISPATCH_UNLOCKED; 3800 3801 fail_host_msg: 3802 /* return the errno failure code as the only status */ 3803 BUG_ON(job->reply_len < sizeof(uint32_t)); 3804 job->reply->reply_payload_rcv_len = 0; 3805 job->reply->result = ret; 3806 job->reply_len = sizeof(uint32_t); 3807 fc_bsg_jobdone(job); 3808 return FC_DISPATCH_UNLOCKED; 3809 } 3810 3811 3812 /* 3813 * fc_bsg_goose_queue - restart rport queue in case it was stopped 3814 * @rport: rport to be restarted 3815 */ 3816 static void 3817 fc_bsg_goose_queue(struct fc_rport *rport) 3818 { 3819 int flagset; 3820 unsigned long flags; 3821 3822 if (!rport->rqst_q) 3823 return; 3824 3825 get_device(&rport->dev); 3826 3827 spin_lock_irqsave(rport->rqst_q->queue_lock, flags); 3828 flagset = test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags) && 3829 !test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags); 3830 if (flagset) 3831 queue_flag_set(QUEUE_FLAG_REENTER, rport->rqst_q); 3832 __blk_run_queue(rport->rqst_q, false); 3833 if (flagset) 3834 queue_flag_clear(QUEUE_FLAG_REENTER, rport->rqst_q); 3835 spin_unlock_irqrestore(rport->rqst_q->queue_lock, flags); 3836 3837 put_device(&rport->dev); 3838 } 3839 3840 3841 /** 3842 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 3843 * @q: rport request queue 3844 * @shost: scsi host rport attached to 3845 * @rport: rport request destined to 3846 * @job: bsg job to be processed 3847 */ 3848 static enum fc_dispatch_result 3849 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, 3850 struct fc_rport *rport, struct fc_bsg_job *job) 3851 { 3852 struct fc_internal *i = to_fc_internal(shost->transportt); 3853 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 3854 int ret; 3855 3856 /* Validate the rport command */ 3857 switch (job->request->msgcode) { 3858 case FC_BSG_RPT_ELS: 3859 cmdlen += sizeof(struct fc_bsg_rport_els); 3860 goto check_bidi; 3861 3862 case FC_BSG_RPT_CT: 3863 cmdlen += sizeof(struct fc_bsg_rport_ct); 3864 check_bidi: 3865 /* there better be xmt and rcv payloads */ 3866 if ((!job->request_payload.payload_len) || 3867 (!job->reply_payload.payload_len)) { 3868 ret = -EINVAL; 3869 goto fail_rport_msg; 3870 } 3871 break; 3872 default: 3873 ret = -EBADR; 3874 goto fail_rport_msg; 3875 } 3876 3877 /* check if we really have all the request data needed */ 3878 if (job->request_len < cmdlen) { 3879 ret = -ENOMSG; 3880 goto fail_rport_msg; 3881 } 3882 3883 ret = i->f->bsg_request(job); 3884 if (!ret) 3885 return FC_DISPATCH_UNLOCKED; 3886 3887 fail_rport_msg: 3888 /* return the errno failure code as the only status */ 3889 BUG_ON(job->reply_len < sizeof(uint32_t)); 3890 job->reply->reply_payload_rcv_len = 0; 3891 job->reply->result = ret; 3892 job->reply_len = sizeof(uint32_t); 3893 fc_bsg_jobdone(job); 3894 return FC_DISPATCH_UNLOCKED; 3895 } 3896 3897 3898 /** 3899 * fc_bsg_request_handler - generic handler for bsg requests 3900 * @q: request queue to manage 3901 * @shost: Scsi_Host related to the bsg object 3902 * @rport: FC remote port related to the bsg object (optional) 3903 * @dev: device structure for bsg object 3904 */ 3905 static void 3906 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, 3907 struct fc_rport *rport, struct device *dev) 3908 { 3909 struct request *req; 3910 struct fc_bsg_job *job; 3911 enum fc_dispatch_result ret; 3912 3913 if (!get_device(dev)) 3914 return; 3915 3916 while (1) { 3917 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && 3918 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 3919 break; 3920 3921 req = blk_fetch_request(q); 3922 if (!req) 3923 break; 3924 3925 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { 3926 req->errors = -ENXIO; 3927 spin_unlock_irq(q->queue_lock); 3928 blk_end_request_all(req, -ENXIO); 3929 spin_lock_irq(q->queue_lock); 3930 continue; 3931 } 3932 3933 spin_unlock_irq(q->queue_lock); 3934 3935 ret = fc_req_to_bsgjob(shost, rport, req); 3936 if (ret) { 3937 req->errors = ret; 3938 blk_end_request_all(req, ret); 3939 spin_lock_irq(q->queue_lock); 3940 continue; 3941 } 3942 3943 job = req->special; 3944 3945 /* check if we have the msgcode value at least */ 3946 if (job->request_len < sizeof(uint32_t)) { 3947 BUG_ON(job->reply_len < sizeof(uint32_t)); 3948 job->reply->reply_payload_rcv_len = 0; 3949 job->reply->result = -ENOMSG; 3950 job->reply_len = sizeof(uint32_t); 3951 fc_bsg_jobdone(job); 3952 spin_lock_irq(q->queue_lock); 3953 continue; 3954 } 3955 3956 /* the dispatch routines will unlock the queue_lock */ 3957 if (rport) 3958 ret = fc_bsg_rport_dispatch(q, shost, rport, job); 3959 else 3960 ret = fc_bsg_host_dispatch(q, shost, job); 3961 3962 /* did dispatcher hit state that can't process any more */ 3963 if (ret == FC_DISPATCH_BREAK) 3964 break; 3965 3966 /* did dispatcher had released the lock */ 3967 if (ret == FC_DISPATCH_UNLOCKED) 3968 spin_lock_irq(q->queue_lock); 3969 } 3970 3971 spin_unlock_irq(q->queue_lock); 3972 put_device(dev); 3973 spin_lock_irq(q->queue_lock); 3974 } 3975 3976 3977 /** 3978 * fc_bsg_host_handler - handler for bsg requests for a fc host 3979 * @q: fc host request queue 3980 */ 3981 static void 3982 fc_bsg_host_handler(struct request_queue *q) 3983 { 3984 struct Scsi_Host *shost = q->queuedata; 3985 3986 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); 3987 } 3988 3989 3990 /** 3991 * fc_bsg_rport_handler - handler for bsg requests for a fc rport 3992 * @q: rport request queue 3993 */ 3994 static void 3995 fc_bsg_rport_handler(struct request_queue *q) 3996 { 3997 struct fc_rport *rport = q->queuedata; 3998 struct Scsi_Host *shost = rport_to_shost(rport); 3999 4000 fc_bsg_request_handler(q, shost, rport, &rport->dev); 4001 } 4002 4003 4004 /** 4005 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4006 * @shost: shost for fc_host 4007 * @fc_host: fc_host adding the structures to 4008 */ 4009 static int 4010 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4011 { 4012 struct device *dev = &shost->shost_gendev; 4013 struct fc_internal *i = to_fc_internal(shost->transportt); 4014 struct request_queue *q; 4015 int err; 4016 char bsg_name[20]; 4017 4018 fc_host->rqst_q = NULL; 4019 4020 if (!i->f->bsg_request) 4021 return -ENOTSUPP; 4022 4023 snprintf(bsg_name, sizeof(bsg_name), 4024 "fc_host%d", shost->host_no); 4025 4026 q = __scsi_alloc_queue(shost, fc_bsg_host_handler); 4027 if (!q) { 4028 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4029 "initialize - no request queue\n", 4030 shost->host_no); 4031 return -ENOMEM; 4032 } 4033 4034 q->queuedata = shost; 4035 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4036 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4037 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4038 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4039 4040 err = bsg_register_queue(q, dev, bsg_name, NULL); 4041 if (err) { 4042 printk(KERN_ERR "fc_host%d: bsg interface failed to " 4043 "initialize - register queue\n", 4044 shost->host_no); 4045 blk_cleanup_queue(q); 4046 return err; 4047 } 4048 4049 fc_host->rqst_q = q; 4050 return 0; 4051 } 4052 4053 4054 /** 4055 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4056 * @shost: shost that rport is attached to 4057 * @rport: rport that the bsg hooks are being attached to 4058 */ 4059 static int 4060 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4061 { 4062 struct device *dev = &rport->dev; 4063 struct fc_internal *i = to_fc_internal(shost->transportt); 4064 struct request_queue *q; 4065 int err; 4066 4067 rport->rqst_q = NULL; 4068 4069 if (!i->f->bsg_request) 4070 return -ENOTSUPP; 4071 4072 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); 4073 if (!q) { 4074 printk(KERN_ERR "%s: bsg interface failed to " 4075 "initialize - no request queue\n", 4076 dev->kobj.name); 4077 return -ENOMEM; 4078 } 4079 4080 q->queuedata = rport; 4081 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); 4082 blk_queue_softirq_done(q, fc_bsg_softirq_done); 4083 blk_queue_rq_timed_out(q, fc_bsg_job_timeout); 4084 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4085 4086 err = bsg_register_queue(q, dev, NULL, NULL); 4087 if (err) { 4088 printk(KERN_ERR "%s: bsg interface failed to " 4089 "initialize - register queue\n", 4090 dev->kobj.name); 4091 blk_cleanup_queue(q); 4092 return err; 4093 } 4094 4095 rport->rqst_q = q; 4096 return 0; 4097 } 4098 4099 4100 /** 4101 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4102 * @q: the request_queue that is to be torn down. 4103 * 4104 * Notes: 4105 * Before unregistering the queue empty any requests that are blocked 4106 * 4107 * 4108 */ 4109 static void 4110 fc_bsg_remove(struct request_queue *q) 4111 { 4112 struct request *req; /* block request */ 4113 int counts; /* totals for request_list count and starved */ 4114 4115 if (q) { 4116 /* Stop taking in new requests */ 4117 spin_lock_irq(q->queue_lock); 4118 blk_stop_queue(q); 4119 4120 /* drain all requests in the queue */ 4121 while (1) { 4122 /* need the lock to fetch a request 4123 * this may fetch the same reqeust as the previous pass 4124 */ 4125 req = blk_fetch_request(q); 4126 /* save requests in use and starved */ 4127 counts = q->rq.count[0] + q->rq.count[1] + 4128 q->rq.starved[0] + q->rq.starved[1]; 4129 spin_unlock_irq(q->queue_lock); 4130 /* any requests still outstanding? */ 4131 if (counts == 0) 4132 break; 4133 4134 /* This may be the same req as the previous iteration, 4135 * always send the blk_end_request_all after a prefetch. 4136 * It is not okay to not end the request because the 4137 * prefetch started the request. 4138 */ 4139 if (req) { 4140 /* return -ENXIO to indicate that this queue is 4141 * going away 4142 */ 4143 req->errors = -ENXIO; 4144 blk_end_request_all(req, -ENXIO); 4145 } 4146 4147 msleep(200); /* allow bsg to possibly finish */ 4148 spin_lock_irq(q->queue_lock); 4149 } 4150 4151 bsg_unregister_queue(q); 4152 blk_cleanup_queue(q); 4153 } 4154 } 4155 4156 4157 /* Original Author: Martin Hicks */ 4158 MODULE_AUTHOR("James Smart"); 4159 MODULE_DESCRIPTION("FC Transport Attributes"); 4160 MODULE_LICENSE("GPL"); 4161 4162 module_init(fc_transport_init); 4163 module_exit(fc_transport_exit); 4164