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