1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * FiberChannel transport specific attributes exported to sysfs. 4 * 5 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. 6 * Copyright (C) 2004-2007 James Smart, Emulex Corporation 7 * Rewrite for host, target, device, and remote port attributes, 8 * statistics, and service functions... 9 * Add vports, etc 10 */ 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/slab.h> 14 #include <linux/delay.h> 15 #include <linux/kernel.h> 16 #include <linux/bsg-lib.h> 17 #include <scsi/scsi_device.h> 18 #include <scsi/scsi_host.h> 19 #include <scsi/scsi_transport.h> 20 #include <scsi/scsi_transport_fc.h> 21 #include <scsi/scsi_cmnd.h> 22 #include <net/netlink.h> 23 #include <scsi/scsi_netlink_fc.h> 24 #include <scsi/scsi_bsg_fc.h> 25 #include <uapi/scsi/fc/fc_els.h> 26 #include "scsi_priv.h" 27 28 static int fc_queue_work(struct Scsi_Host *, struct work_struct *); 29 static void fc_vport_sched_delete(struct work_struct *work); 30 static int fc_vport_setup(struct Scsi_Host *shost, int channel, 31 struct device *pdev, struct fc_vport_identifiers *ids, 32 struct fc_vport **vport); 33 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); 34 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); 35 static void fc_bsg_remove(struct request_queue *); 36 static void fc_bsg_goose_queue(struct fc_rport *); 37 static void fc_li_stats_update(u16 event_type, 38 struct fc_fpin_stats *stats); 39 static void fc_delivery_stats_update(u32 reason_code, 40 struct fc_fpin_stats *stats); 41 static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats); 42 43 /* 44 * Module Parameters 45 */ 46 47 /* 48 * dev_loss_tmo: the default number of seconds that the FC transport 49 * should insulate the loss of a remote port. 50 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 51 */ 52 static unsigned int fc_dev_loss_tmo = 60; /* seconds */ 53 54 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); 55 MODULE_PARM_DESC(dev_loss_tmo, 56 "Maximum number of seconds that the FC transport should" 57 " insulate the loss of a remote port. Once this value is" 58 " exceeded, the scsi target is removed. Value should be" 59 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" 60 " fast_io_fail_tmo is not set."); 61 62 /* 63 * Redefine so that we can have same named attributes in the 64 * sdev/starget/host objects. 65 */ 66 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 67 struct device_attribute device_attr_##_prefix##_##_name = \ 68 __ATTR(_name,_mode,_show,_store) 69 70 #define fc_enum_name_search(title, table_type, table) \ 71 static const char *get_fc_##title##_name(enum table_type table_key) \ 72 { \ 73 int i; \ 74 char *name = NULL; \ 75 \ 76 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 77 if (table[i].value == table_key) { \ 78 name = table[i].name; \ 79 break; \ 80 } \ 81 } \ 82 return name; \ 83 } 84 85 #define fc_enum_name_match(title, table_type, table) \ 86 static int get_fc_##title##_match(const char *table_key, \ 87 enum table_type *value) \ 88 { \ 89 int i; \ 90 \ 91 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 92 if (strncmp(table_key, table[i].name, \ 93 table[i].matchlen) == 0) { \ 94 *value = table[i].value; \ 95 return 0; /* success */ \ 96 } \ 97 } \ 98 return 1; /* failure */ \ 99 } 100 101 102 /* Convert fc_port_type values to ascii string name */ 103 static struct { 104 enum fc_port_type value; 105 char *name; 106 } fc_port_type_names[] = { 107 { FC_PORTTYPE_UNKNOWN, "Unknown" }, 108 { FC_PORTTYPE_OTHER, "Other" }, 109 { FC_PORTTYPE_NOTPRESENT, "Not Present" }, 110 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, 111 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, 112 { FC_PORTTYPE_LPORT, "LPort (private loop)" }, 113 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, 114 { FC_PORTTYPE_NPIV, "NPIV VPORT" }, 115 }; 116 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) 117 #define FC_PORTTYPE_MAX_NAMELEN 50 118 119 /* Reuse fc_port_type enum function for vport_type */ 120 #define get_fc_vport_type_name get_fc_port_type_name 121 122 123 /* Convert fc_host_event_code values to ascii string name */ 124 static const struct { 125 enum fc_host_event_code value; 126 char *name; 127 } fc_host_event_code_names[] = { 128 { FCH_EVT_LIP, "lip" }, 129 { FCH_EVT_LINKUP, "link_up" }, 130 { FCH_EVT_LINKDOWN, "link_down" }, 131 { FCH_EVT_LIPRESET, "lip_reset" }, 132 { FCH_EVT_RSCN, "rscn" }, 133 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, 134 { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, 135 { FCH_EVT_PORT_ONLINE, "port_online" }, 136 { FCH_EVT_PORT_OFFLINE, "port_offline" }, 137 { FCH_EVT_PORT_FABRIC, "port_fabric" }, 138 { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, 139 { FCH_EVT_LINK_FPIN, "link_FPIN" }, 140 { FCH_EVT_LINK_FPIN_ACK, "link_FPIN_ACK" }, 141 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 142 }; 143 fc_enum_name_search(host_event_code, fc_host_event_code, 144 fc_host_event_code_names) 145 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 146 147 148 /* Convert fc_port_state values to ascii string name */ 149 static struct { 150 enum fc_port_state value; 151 char *name; 152 int matchlen; 153 } fc_port_state_names[] = { 154 { FC_PORTSTATE_UNKNOWN, "Unknown", 7}, 155 { FC_PORTSTATE_NOTPRESENT, "Not Present", 11 }, 156 { FC_PORTSTATE_ONLINE, "Online", 6 }, 157 { FC_PORTSTATE_OFFLINE, "Offline", 7 }, 158 { FC_PORTSTATE_BLOCKED, "Blocked", 7 }, 159 { FC_PORTSTATE_BYPASSED, "Bypassed", 8 }, 160 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics", 11 }, 161 { FC_PORTSTATE_LINKDOWN, "Linkdown", 8 }, 162 { FC_PORTSTATE_ERROR, "Error", 5 }, 163 { FC_PORTSTATE_LOOPBACK, "Loopback", 8 }, 164 { FC_PORTSTATE_DELETED, "Deleted", 7 }, 165 { FC_PORTSTATE_MARGINAL, "Marginal", 8 }, 166 }; 167 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 168 fc_enum_name_match(port_state, fc_port_state, fc_port_state_names) 169 #define FC_PORTSTATE_MAX_NAMELEN 20 170 171 172 /* Convert fc_vport_state values to ascii string name */ 173 static struct { 174 enum fc_vport_state value; 175 char *name; 176 } fc_vport_state_names[] = { 177 { FC_VPORT_UNKNOWN, "Unknown" }, 178 { FC_VPORT_ACTIVE, "Active" }, 179 { FC_VPORT_DISABLED, "Disabled" }, 180 { FC_VPORT_LINKDOWN, "Linkdown" }, 181 { FC_VPORT_INITIALIZING, "Initializing" }, 182 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 183 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 184 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 185 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 186 { FC_VPORT_FAILED, "VPort Failed" }, 187 }; 188 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 189 #define FC_VPORTSTATE_MAX_NAMELEN 24 190 191 /* Reuse fc_vport_state enum function for vport_last_state */ 192 #define get_fc_vport_last_state_name get_fc_vport_state_name 193 194 195 /* Convert fc_tgtid_binding_type values to ascii string name */ 196 static const struct { 197 enum fc_tgtid_binding_type value; 198 char *name; 199 int matchlen; 200 } fc_tgtid_binding_type_names[] = { 201 { FC_TGTID_BIND_NONE, "none", 4 }, 202 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 203 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 204 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 205 }; 206 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 207 fc_tgtid_binding_type_names) 208 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 209 fc_tgtid_binding_type_names) 210 #define FC_BINDTYPE_MAX_NAMELEN 30 211 212 213 #define fc_bitfield_name_search(title, table) \ 214 static ssize_t \ 215 get_fc_##title##_names(u32 table_key, char *buf) \ 216 { \ 217 char *prefix = ""; \ 218 ssize_t len = 0; \ 219 int i; \ 220 \ 221 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 222 if (table[i].value & table_key) { \ 223 len += sprintf(buf + len, "%s%s", \ 224 prefix, table[i].name); \ 225 prefix = ", "; \ 226 } \ 227 } \ 228 len += sprintf(buf + len, "\n"); \ 229 return len; \ 230 } 231 232 233 /* Convert FC_COS bit values to ascii string name */ 234 static const struct { 235 u32 value; 236 char *name; 237 } fc_cos_names[] = { 238 { FC_COS_CLASS1, "Class 1" }, 239 { FC_COS_CLASS2, "Class 2" }, 240 { FC_COS_CLASS3, "Class 3" }, 241 { FC_COS_CLASS4, "Class 4" }, 242 { FC_COS_CLASS6, "Class 6" }, 243 }; 244 fc_bitfield_name_search(cos, fc_cos_names) 245 246 247 /* Convert FC_PORTSPEED bit values to ascii string name */ 248 static const struct { 249 u32 value; 250 char *name; 251 } fc_port_speed_names[] = { 252 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 253 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 254 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 255 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 256 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 257 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 258 { FC_PORTSPEED_32GBIT, "32 Gbit" }, 259 { FC_PORTSPEED_20GBIT, "20 Gbit" }, 260 { FC_PORTSPEED_40GBIT, "40 Gbit" }, 261 { FC_PORTSPEED_50GBIT, "50 Gbit" }, 262 { FC_PORTSPEED_100GBIT, "100 Gbit" }, 263 { FC_PORTSPEED_25GBIT, "25 Gbit" }, 264 { FC_PORTSPEED_64GBIT, "64 Gbit" }, 265 { FC_PORTSPEED_128GBIT, "128 Gbit" }, 266 { FC_PORTSPEED_256GBIT, "256 Gbit" }, 267 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 268 }; 269 fc_bitfield_name_search(port_speed, fc_port_speed_names) 270 271 272 static int 273 show_fc_fc4s (char *buf, u8 *fc4_list) 274 { 275 int i, len=0; 276 277 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 278 len += sprintf(buf + len , "0x%02x ", *fc4_list); 279 len += sprintf(buf + len, "\n"); 280 return len; 281 } 282 283 284 /* Convert FC_PORT_ROLE bit values to ascii string name */ 285 static const struct { 286 u32 value; 287 char *name; 288 } fc_port_role_names[] = { 289 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 290 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 291 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 292 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" }, 293 { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" }, 294 { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" }, 295 { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" }, 296 }; 297 fc_bitfield_name_search(port_roles, fc_port_role_names) 298 299 /* 300 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 301 */ 302 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 303 #define FC_WELLKNOWN_ROLE_MASK 0x00000f 304 #define FC_FPORT_PORTID 0x00000e 305 #define FC_FABCTLR_PORTID 0x00000d 306 #define FC_DIRSRVR_PORTID 0x00000c 307 #define FC_TIMESRVR_PORTID 0x00000b 308 #define FC_MGMTSRVR_PORTID 0x00000a 309 310 311 static void fc_timeout_deleted_rport(struct work_struct *work); 312 static void fc_timeout_fail_rport_io(struct work_struct *work); 313 static void fc_scsi_scan_rport(struct work_struct *work); 314 315 /* 316 * Attribute counts pre object type... 317 * Increase these values if you add attributes 318 */ 319 #define FC_STARGET_NUM_ATTRS 3 320 #define FC_RPORT_NUM_ATTRS 10 321 #define FC_VPORT_NUM_ATTRS 9 322 #define FC_HOST_NUM_ATTRS 29 323 324 struct fc_internal { 325 struct scsi_transport_template t; 326 struct fc_function_template *f; 327 328 /* 329 * For attributes : each object has : 330 * An array of the actual attributes structures 331 * An array of null-terminated pointers to the attribute 332 * structures - used for mid-layer interaction. 333 * 334 * The attribute containers for the starget and host are are 335 * part of the midlayer. As the remote port is specific to the 336 * fc transport, we must provide the attribute container. 337 */ 338 struct device_attribute private_starget_attrs[ 339 FC_STARGET_NUM_ATTRS]; 340 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 341 342 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 343 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 344 345 struct transport_container rport_attr_cont; 346 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 347 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 348 349 struct transport_container vport_attr_cont; 350 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 351 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 352 }; 353 354 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 355 356 static int fc_target_setup(struct transport_container *tc, struct device *dev, 357 struct device *cdev) 358 { 359 struct scsi_target *starget = to_scsi_target(dev); 360 struct fc_rport *rport = starget_to_rport(starget); 361 362 /* 363 * if parent is remote port, use values from remote port. 364 * Otherwise, this host uses the fc_transport, but not the 365 * remote port interface. As such, initialize to known non-values. 366 */ 367 if (rport) { 368 fc_starget_node_name(starget) = rport->node_name; 369 fc_starget_port_name(starget) = rport->port_name; 370 fc_starget_port_id(starget) = rport->port_id; 371 } else { 372 fc_starget_node_name(starget) = -1; 373 fc_starget_port_name(starget) = -1; 374 fc_starget_port_id(starget) = -1; 375 } 376 377 return 0; 378 } 379 380 static DECLARE_TRANSPORT_CLASS(fc_transport_class, 381 "fc_transport", 382 fc_target_setup, 383 NULL, 384 NULL); 385 386 static int fc_host_setup(struct transport_container *tc, struct device *dev, 387 struct device *cdev) 388 { 389 struct Scsi_Host *shost = dev_to_shost(dev); 390 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 391 392 /* 393 * Set default values easily detected by the midlayer as 394 * failure cases. The scsi lldd is responsible for initializing 395 * all transport attributes to valid values per host. 396 */ 397 fc_host->node_name = -1; 398 fc_host->port_name = -1; 399 fc_host->permanent_port_name = -1; 400 fc_host->supported_classes = FC_COS_UNSPECIFIED; 401 memset(fc_host->supported_fc4s, 0, 402 sizeof(fc_host->supported_fc4s)); 403 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 404 fc_host->maxframe_size = -1; 405 fc_host->max_npiv_vports = 0; 406 memset(fc_host->serial_number, 0, 407 sizeof(fc_host->serial_number)); 408 memset(fc_host->manufacturer, 0, 409 sizeof(fc_host->manufacturer)); 410 memset(fc_host->model, 0, 411 sizeof(fc_host->model)); 412 memset(fc_host->model_description, 0, 413 sizeof(fc_host->model_description)); 414 memset(fc_host->hardware_version, 0, 415 sizeof(fc_host->hardware_version)); 416 memset(fc_host->driver_version, 0, 417 sizeof(fc_host->driver_version)); 418 memset(fc_host->firmware_version, 0, 419 sizeof(fc_host->firmware_version)); 420 memset(fc_host->optionrom_version, 0, 421 sizeof(fc_host->optionrom_version)); 422 423 fc_host->port_id = -1; 424 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 425 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 426 memset(fc_host->active_fc4s, 0, 427 sizeof(fc_host->active_fc4s)); 428 fc_host->speed = FC_PORTSPEED_UNKNOWN; 429 fc_host->fabric_name = -1; 430 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 431 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 432 memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats)); 433 434 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 435 436 INIT_LIST_HEAD(&fc_host->rports); 437 INIT_LIST_HEAD(&fc_host->rport_bindings); 438 INIT_LIST_HEAD(&fc_host->vports); 439 fc_host->next_rport_number = 0; 440 fc_host->next_target_id = 0; 441 fc_host->next_vport_number = 0; 442 fc_host->npiv_vports_inuse = 0; 443 444 fc_host->work_q = alloc_workqueue("fc_wq_%d", 0, 0, shost->host_no); 445 if (!fc_host->work_q) 446 return -ENOMEM; 447 448 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 449 450 fc_bsg_hostadd(shost, fc_host); 451 /* ignore any bsg add error - we just can't do sgio */ 452 453 return 0; 454 } 455 456 static int fc_host_remove(struct transport_container *tc, struct device *dev, 457 struct device *cdev) 458 { 459 struct Scsi_Host *shost = dev_to_shost(dev); 460 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 461 462 fc_bsg_remove(fc_host->rqst_q); 463 return 0; 464 } 465 466 static DECLARE_TRANSPORT_CLASS(fc_host_class, 467 "fc_host", 468 fc_host_setup, 469 fc_host_remove, 470 NULL); 471 472 /* 473 * Setup and Remove actions for remote ports are handled 474 * in the service functions below. 475 */ 476 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 477 "fc_remote_ports", 478 NULL, 479 NULL, 480 NULL); 481 482 /* 483 * Setup and Remove actions for virtual ports are handled 484 * in the service functions below. 485 */ 486 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 487 "fc_vports", 488 NULL, 489 NULL, 490 NULL); 491 492 /* 493 * Netlink Infrastructure 494 */ 495 496 static atomic_t fc_event_seq; 497 498 /** 499 * fc_get_event_number - Obtain the next sequential FC event number 500 * 501 * Notes: 502 * We could have inlined this, but it would have required fc_event_seq to 503 * be exposed. For now, live with the subroutine call. 504 * Atomic used to avoid lock/unlock... 505 */ 506 u32 507 fc_get_event_number(void) 508 { 509 return atomic_add_return(1, &fc_event_seq); 510 } 511 EXPORT_SYMBOL(fc_get_event_number); 512 513 /** 514 * fc_host_post_fc_event - routine to do the work of posting an event 515 * on an fc_host. 516 * @shost: host the event occurred on 517 * @event_number: fc event number obtained from get_fc_event_number() 518 * @event_code: fc_host event being posted 519 * @data_len: amount, in bytes, of event data 520 * @data_buf: pointer to event data 521 * @vendor_id: value for Vendor id 522 * 523 * Notes: 524 * This routine assumes no locks are held on entry. 525 */ 526 void 527 fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number, 528 enum fc_host_event_code event_code, 529 u32 data_len, char *data_buf, u64 vendor_id) 530 { 531 struct sk_buff *skb; 532 struct nlmsghdr *nlh; 533 struct fc_nl_event *event; 534 const char *name; 535 size_t len, padding; 536 int err; 537 538 if (!data_buf || data_len < 4) 539 data_len = 0; 540 541 if (!scsi_nl_sock) { 542 err = -ENOENT; 543 goto send_fail; 544 } 545 546 len = FC_NL_MSGALIGN(sizeof(*event) - sizeof(event->event_data) + data_len); 547 548 skb = nlmsg_new(len, GFP_KERNEL); 549 if (!skb) { 550 err = -ENOBUFS; 551 goto send_fail; 552 } 553 554 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 555 if (!nlh) { 556 err = -ENOBUFS; 557 goto send_fail_skb; 558 } 559 event = nlmsg_data(nlh); 560 561 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 562 FC_NL_ASYNC_EVENT, len); 563 event->seconds = ktime_get_real_seconds(); 564 event->vendor_id = vendor_id; 565 event->host_no = shost->host_no; 566 event->event_datalen = data_len; /* bytes */ 567 event->event_num = event_number; 568 event->event_code = event_code; 569 if (data_len) 570 memcpy(event->event_data_flex, data_buf, data_len); 571 padding = len - offsetof(typeof(*event), event_data_flex) - data_len; 572 memset(event->event_data_flex + data_len, 0, padding); 573 574 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 575 GFP_KERNEL); 576 return; 577 578 send_fail_skb: 579 kfree_skb(skb); 580 send_fail: 581 name = get_fc_host_event_code_name(event_code); 582 printk(KERN_WARNING 583 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 584 __func__, shost->host_no, 585 (name) ? name : "<unknown>", 586 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err); 587 return; 588 } 589 EXPORT_SYMBOL(fc_host_post_fc_event); 590 591 /** 592 * fc_host_post_event - called to post an even on an fc_host. 593 * @shost: host the event occurred on 594 * @event_number: fc event number obtained from get_fc_event_number() 595 * @event_code: fc_host event being posted 596 * @event_data: 32bits of data for the event being posted 597 * 598 * Notes: 599 * This routine assumes no locks are held on entry. 600 */ 601 void 602 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 603 enum fc_host_event_code event_code, u32 event_data) 604 { 605 fc_host_post_fc_event(shost, event_number, event_code, 606 (u32)sizeof(u32), (char *)&event_data, 0); 607 } 608 EXPORT_SYMBOL(fc_host_post_event); 609 610 611 /** 612 * fc_host_post_vendor_event - called to post a vendor unique event 613 * on an fc_host 614 * @shost: host the event occurred on 615 * @event_number: fc event number obtained from get_fc_event_number() 616 * @data_len: amount, in bytes, of vendor unique data 617 * @data_buf: pointer to vendor unique data 618 * @vendor_id: Vendor id 619 * 620 * Notes: 621 * This routine assumes no locks are held on entry. 622 */ 623 void 624 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 625 u32 data_len, char * data_buf, u64 vendor_id) 626 { 627 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE, 628 data_len, data_buf, vendor_id); 629 } 630 EXPORT_SYMBOL(fc_host_post_vendor_event); 631 632 /** 633 * fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn 634 * @shost: host the fc_rport is associated with 635 * @wwpn: wwpn of the fc_rport device 636 * 637 * Notes: 638 * This routine assumes no locks are held on entry. 639 */ 640 struct fc_rport * 641 fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn) 642 { 643 struct fc_rport *rport; 644 unsigned long flags; 645 646 spin_lock_irqsave(shost->host_lock, flags); 647 648 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 649 if (rport->port_state != FC_PORTSTATE_ONLINE) 650 continue; 651 652 if (rport->port_name == wwpn) { 653 spin_unlock_irqrestore(shost->host_lock, flags); 654 return rport; 655 } 656 } 657 658 spin_unlock_irqrestore(shost->host_lock, flags); 659 return NULL; 660 } 661 EXPORT_SYMBOL(fc_find_rport_by_wwpn); 662 663 static void 664 fc_li_stats_update(u16 event_type, 665 struct fc_fpin_stats *stats) 666 { 667 stats->li++; 668 switch (event_type) { 669 case FPIN_LI_UNKNOWN: 670 stats->li_failure_unknown++; 671 break; 672 case FPIN_LI_LINK_FAILURE: 673 stats->li_link_failure_count++; 674 break; 675 case FPIN_LI_LOSS_OF_SYNC: 676 stats->li_loss_of_sync_count++; 677 break; 678 case FPIN_LI_LOSS_OF_SIG: 679 stats->li_loss_of_signals_count++; 680 break; 681 case FPIN_LI_PRIM_SEQ_ERR: 682 stats->li_prim_seq_err_count++; 683 break; 684 case FPIN_LI_INVALID_TX_WD: 685 stats->li_invalid_tx_word_count++; 686 break; 687 case FPIN_LI_INVALID_CRC: 688 stats->li_invalid_crc_count++; 689 break; 690 case FPIN_LI_DEVICE_SPEC: 691 stats->li_device_specific++; 692 break; 693 } 694 } 695 696 static void 697 fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats) 698 { 699 stats->dn++; 700 switch (reason_code) { 701 case FPIN_DELI_UNKNOWN: 702 stats->dn_unknown++; 703 break; 704 case FPIN_DELI_TIMEOUT: 705 stats->dn_timeout++; 706 break; 707 case FPIN_DELI_UNABLE_TO_ROUTE: 708 stats->dn_unable_to_route++; 709 break; 710 case FPIN_DELI_DEVICE_SPEC: 711 stats->dn_device_specific++; 712 break; 713 } 714 } 715 716 static void 717 fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats) 718 { 719 stats->cn++; 720 switch (event_type) { 721 case FPIN_CONGN_CLEAR: 722 stats->cn_clear++; 723 break; 724 case FPIN_CONGN_LOST_CREDIT: 725 stats->cn_lost_credit++; 726 break; 727 case FPIN_CONGN_CREDIT_STALL: 728 stats->cn_credit_stall++; 729 break; 730 case FPIN_CONGN_OVERSUBSCRIPTION: 731 stats->cn_oversubscription++; 732 break; 733 case FPIN_CONGN_DEVICE_SPEC: 734 stats->cn_device_specific++; 735 } 736 } 737 738 /* 739 * fc_fpin_li_stats_update - routine to update Link Integrity 740 * event statistics. 741 * @shost: host the FPIN was received on 742 * @tlv: pointer to link integrity descriptor 743 * 744 */ 745 static void 746 fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv) 747 { 748 u8 i; 749 struct fc_rport *rport = NULL; 750 struct fc_rport *attach_rport = NULL; 751 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 752 struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv; 753 u16 event_type = be16_to_cpu(li_desc->event_type); 754 u64 wwpn; 755 756 rport = fc_find_rport_by_wwpn(shost, 757 be64_to_cpu(li_desc->attached_wwpn)); 758 if (rport && 759 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 760 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 761 attach_rport = rport; 762 fc_li_stats_update(event_type, &attach_rport->fpin_stats); 763 } 764 765 if (be32_to_cpu(li_desc->pname_count) > 0) { 766 for (i = 0; 767 i < be32_to_cpu(li_desc->pname_count); 768 i++) { 769 wwpn = be64_to_cpu(li_desc->pname_list[i]); 770 rport = fc_find_rport_by_wwpn(shost, wwpn); 771 if (rport && 772 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 773 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 774 if (rport == attach_rport) 775 continue; 776 fc_li_stats_update(event_type, 777 &rport->fpin_stats); 778 } 779 } 780 } 781 782 if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn)) 783 fc_li_stats_update(event_type, &fc_host->fpin_stats); 784 } 785 786 /* 787 * fc_fpin_delivery_stats_update - routine to update Delivery Notification 788 * event statistics. 789 * @shost: host the FPIN was received on 790 * @tlv: pointer to delivery descriptor 791 * 792 */ 793 static void 794 fc_fpin_delivery_stats_update(struct Scsi_Host *shost, 795 struct fc_tlv_desc *tlv) 796 { 797 struct fc_rport *rport = NULL; 798 struct fc_rport *attach_rport = NULL; 799 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 800 struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv; 801 u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code); 802 803 rport = fc_find_rport_by_wwpn(shost, 804 be64_to_cpu(dn_desc->attached_wwpn)); 805 if (rport && 806 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 807 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 808 attach_rport = rport; 809 fc_delivery_stats_update(reason_code, 810 &attach_rport->fpin_stats); 811 } 812 813 if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn)) 814 fc_delivery_stats_update(reason_code, &fc_host->fpin_stats); 815 } 816 817 /* 818 * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion 819 * event statistics. 820 * @shost: host the FPIN was received on 821 * @tlv: pointer to peer congestion descriptor 822 * 823 */ 824 static void 825 fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost, 826 struct fc_tlv_desc *tlv) 827 { 828 u8 i; 829 struct fc_rport *rport = NULL; 830 struct fc_rport *attach_rport = NULL; 831 struct fc_fn_peer_congn_desc *pc_desc = 832 (struct fc_fn_peer_congn_desc *)tlv; 833 u16 event_type = be16_to_cpu(pc_desc->event_type); 834 u64 wwpn; 835 836 rport = fc_find_rport_by_wwpn(shost, 837 be64_to_cpu(pc_desc->attached_wwpn)); 838 if (rport && 839 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 840 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 841 attach_rport = rport; 842 fc_cn_stats_update(event_type, &attach_rport->fpin_stats); 843 } 844 845 if (be32_to_cpu(pc_desc->pname_count) > 0) { 846 for (i = 0; 847 i < be32_to_cpu(pc_desc->pname_count); 848 i++) { 849 wwpn = be64_to_cpu(pc_desc->pname_list[i]); 850 rport = fc_find_rport_by_wwpn(shost, wwpn); 851 if (rport && 852 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 853 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 854 if (rport == attach_rport) 855 continue; 856 fc_cn_stats_update(event_type, 857 &rport->fpin_stats); 858 } 859 } 860 } 861 } 862 863 /* 864 * fc_fpin_congn_stats_update - routine to update Congestion 865 * event statistics. 866 * @shost: host the FPIN was received on 867 * @tlv: pointer to congestion descriptor 868 * 869 */ 870 static void 871 fc_fpin_congn_stats_update(struct Scsi_Host *shost, 872 struct fc_tlv_desc *tlv) 873 { 874 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 875 struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv; 876 877 fc_cn_stats_update(be16_to_cpu(congn->event_type), 878 &fc_host->fpin_stats); 879 } 880 881 /** 882 * fc_host_fpin_rcv - routine to process a received FPIN. 883 * @shost: host the FPIN was received on 884 * @fpin_len: length of FPIN payload, in bytes 885 * @fpin_buf: pointer to FPIN payload 886 * @event_acknowledge: 1, if LLDD handles this event. 887 * Notes: 888 * This routine assumes no locks are held on entry. 889 */ 890 void 891 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf, 892 u8 event_acknowledge) 893 { 894 struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf; 895 struct fc_tlv_desc *tlv; 896 u32 bytes_remain; 897 u32 dtag; 898 enum fc_host_event_code event_code = 899 event_acknowledge ? FCH_EVT_LINK_FPIN_ACK : FCH_EVT_LINK_FPIN; 900 901 /* Update Statistics */ 902 tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0]; 903 bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc); 904 bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len)); 905 906 while (bytes_remain >= FC_TLV_DESC_HDR_SZ && 907 bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) { 908 dtag = be32_to_cpu(tlv->desc_tag); 909 switch (dtag) { 910 case ELS_DTAG_LNK_INTEGRITY: 911 fc_fpin_li_stats_update(shost, tlv); 912 break; 913 case ELS_DTAG_DELIVERY: 914 fc_fpin_delivery_stats_update(shost, tlv); 915 break; 916 case ELS_DTAG_PEER_CONGEST: 917 fc_fpin_peer_congn_stats_update(shost, tlv); 918 break; 919 case ELS_DTAG_CONGESTION: 920 fc_fpin_congn_stats_update(shost, tlv); 921 } 922 923 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv); 924 tlv = fc_tlv_next_desc(tlv); 925 } 926 927 fc_host_post_fc_event(shost, fc_get_event_number(), 928 event_code, fpin_len, fpin_buf, 0); 929 } 930 EXPORT_SYMBOL(fc_host_fpin_rcv); 931 932 933 static __init int fc_transport_init(void) 934 { 935 int error; 936 937 atomic_set(&fc_event_seq, 0); 938 939 error = transport_class_register(&fc_host_class); 940 if (error) 941 return error; 942 error = transport_class_register(&fc_vport_class); 943 if (error) 944 goto unreg_host_class; 945 error = transport_class_register(&fc_rport_class); 946 if (error) 947 goto unreg_vport_class; 948 error = transport_class_register(&fc_transport_class); 949 if (error) 950 goto unreg_rport_class; 951 return 0; 952 953 unreg_rport_class: 954 transport_class_unregister(&fc_rport_class); 955 unreg_vport_class: 956 transport_class_unregister(&fc_vport_class); 957 unreg_host_class: 958 transport_class_unregister(&fc_host_class); 959 return error; 960 } 961 962 static void __exit fc_transport_exit(void) 963 { 964 transport_class_unregister(&fc_transport_class); 965 transport_class_unregister(&fc_rport_class); 966 transport_class_unregister(&fc_host_class); 967 transport_class_unregister(&fc_vport_class); 968 } 969 970 /* 971 * FC Remote Port Attribute Management 972 */ 973 974 #define fc_rport_show_function(field, format_string, sz, cast) \ 975 static ssize_t \ 976 show_fc_rport_##field (struct device *dev, \ 977 struct device_attribute *attr, char *buf) \ 978 { \ 979 struct fc_rport *rport = transport_class_to_rport(dev); \ 980 struct Scsi_Host *shost = rport_to_shost(rport); \ 981 struct fc_internal *i = to_fc_internal(shost->transportt); \ 982 if ((i->f->get_rport_##field) && \ 983 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 984 (rport->port_state == FC_PORTSTATE_DELETED) || \ 985 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 986 i->f->get_rport_##field(rport); \ 987 return snprintf(buf, sz, format_string, cast rport->field); \ 988 } 989 990 #define fc_rport_store_function(field) \ 991 static ssize_t \ 992 store_fc_rport_##field(struct device *dev, \ 993 struct device_attribute *attr, \ 994 const char *buf, size_t count) \ 995 { \ 996 int val; \ 997 struct fc_rport *rport = transport_class_to_rport(dev); \ 998 struct Scsi_Host *shost = rport_to_shost(rport); \ 999 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1000 char *cp; \ 1001 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 1002 (rport->port_state == FC_PORTSTATE_DELETED) || \ 1003 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 1004 return -EBUSY; \ 1005 val = simple_strtoul(buf, &cp, 0); \ 1006 if (*cp && (*cp != '\n')) \ 1007 return -EINVAL; \ 1008 i->f->set_rport_##field(rport, val); \ 1009 return count; \ 1010 } 1011 1012 #define fc_rport_rd_attr(field, format_string, sz) \ 1013 fc_rport_show_function(field, format_string, sz, ) \ 1014 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1015 show_fc_rport_##field, NULL) 1016 1017 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 1018 fc_rport_show_function(field, format_string, sz, (cast)) \ 1019 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1020 show_fc_rport_##field, NULL) 1021 1022 #define fc_rport_rw_attr(field, format_string, sz) \ 1023 fc_rport_show_function(field, format_string, sz, ) \ 1024 fc_rport_store_function(field) \ 1025 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 1026 show_fc_rport_##field, \ 1027 store_fc_rport_##field) 1028 1029 1030 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 1031 static ssize_t \ 1032 show_fc_rport_##field (struct device *dev, \ 1033 struct device_attribute *attr, char *buf) \ 1034 { \ 1035 struct fc_rport *rport = transport_class_to_rport(dev); \ 1036 return snprintf(buf, sz, format_string, cast rport->field); \ 1037 } 1038 1039 #define fc_private_rport_rd_attr(field, format_string, sz) \ 1040 fc_private_rport_show_function(field, format_string, sz, ) \ 1041 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1042 show_fc_rport_##field, NULL) 1043 1044 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 1045 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 1046 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1047 show_fc_rport_##field, NULL) 1048 1049 1050 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 1051 static ssize_t \ 1052 show_fc_rport_##title (struct device *dev, \ 1053 struct device_attribute *attr, char *buf) \ 1054 { \ 1055 struct fc_rport *rport = transport_class_to_rport(dev); \ 1056 const char *name; \ 1057 name = get_fc_##title##_name(rport->title); \ 1058 if (!name) \ 1059 return -EINVAL; \ 1060 return snprintf(buf, maxlen, "%s\n", name); \ 1061 } \ 1062 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 1063 show_fc_rport_##title, NULL) 1064 1065 1066 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 1067 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1068 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 1069 i->private_rport_attrs[count].store = NULL; \ 1070 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1071 if (i->f->show_rport_##field) \ 1072 count++ 1073 1074 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 1075 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1076 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 1077 i->private_rport_attrs[count].store = NULL; \ 1078 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1079 count++ 1080 1081 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 1082 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1083 if (!i->f->set_rport_##field) { \ 1084 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 1085 i->private_rport_attrs[count].store = NULL; \ 1086 } \ 1087 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1088 if (i->f->show_rport_##field) \ 1089 count++ 1090 1091 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 1092 { \ 1093 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1094 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1095 count++; \ 1096 } 1097 1098 1099 /* The FC Transport Remote Port Attributes: */ 1100 1101 /* Fixed Remote Port Attributes */ 1102 1103 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 1104 1105 static ssize_t 1106 show_fc_rport_supported_classes (struct device *dev, 1107 struct device_attribute *attr, char *buf) 1108 { 1109 struct fc_rport *rport = transport_class_to_rport(dev); 1110 if (rport->supported_classes == FC_COS_UNSPECIFIED) 1111 return snprintf(buf, 20, "unspecified\n"); 1112 return get_fc_cos_names(rport->supported_classes, buf); 1113 } 1114 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 1115 show_fc_rport_supported_classes, NULL); 1116 1117 /* Dynamic Remote Port Attributes */ 1118 1119 /* 1120 * dev_loss_tmo attribute 1121 */ 1122 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 1123 { 1124 char *cp; 1125 1126 *val = simple_strtoul(buf, &cp, 0); 1127 if (*cp && (*cp != '\n')) 1128 return -EINVAL; 1129 /* 1130 * Check for overflow; dev_loss_tmo is u32 1131 */ 1132 if (*val > UINT_MAX) 1133 return -EINVAL; 1134 1135 return 0; 1136 } 1137 1138 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 1139 unsigned long val) 1140 { 1141 struct Scsi_Host *shost = rport_to_shost(rport); 1142 struct fc_internal *i = to_fc_internal(shost->transportt); 1143 1144 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 1145 (rport->port_state == FC_PORTSTATE_DELETED) || 1146 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 1147 return -EBUSY; 1148 /* 1149 * Check for overflow; dev_loss_tmo is u32 1150 */ 1151 if (val > UINT_MAX) 1152 return -EINVAL; 1153 1154 /* 1155 * If fast_io_fail is off we have to cap 1156 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 1157 */ 1158 if (rport->fast_io_fail_tmo == -1 && 1159 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 1160 return -EINVAL; 1161 1162 i->f->set_rport_dev_loss_tmo(rport, val); 1163 return 0; 1164 } 1165 1166 fc_rport_show_function(dev_loss_tmo, "%u\n", 20, ) 1167 static ssize_t 1168 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 1169 const char *buf, size_t count) 1170 { 1171 struct fc_rport *rport = transport_class_to_rport(dev); 1172 unsigned long val; 1173 int rc; 1174 1175 rc = fc_str_to_dev_loss(buf, &val); 1176 if (rc) 1177 return rc; 1178 1179 rc = fc_rport_set_dev_loss_tmo(rport, val); 1180 if (rc) 1181 return rc; 1182 return count; 1183 } 1184 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 1185 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 1186 1187 1188 /* Private Remote Port Attributes */ 1189 1190 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1191 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1192 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 1193 1194 static ssize_t 1195 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 1196 char *buf) 1197 { 1198 struct fc_rport *rport = transport_class_to_rport(dev); 1199 1200 /* identify any roles that are port_id specific */ 1201 if ((rport->port_id != -1) && 1202 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 1203 FC_WELLKNOWN_PORTID_MASK) { 1204 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 1205 case FC_FPORT_PORTID: 1206 return snprintf(buf, 30, "Fabric Port\n"); 1207 case FC_FABCTLR_PORTID: 1208 return snprintf(buf, 30, "Fabric Controller\n"); 1209 case FC_DIRSRVR_PORTID: 1210 return snprintf(buf, 30, "Directory Server\n"); 1211 case FC_TIMESRVR_PORTID: 1212 return snprintf(buf, 30, "Time Server\n"); 1213 case FC_MGMTSRVR_PORTID: 1214 return snprintf(buf, 30, "Management Server\n"); 1215 default: 1216 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 1217 } 1218 } else { 1219 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 1220 return snprintf(buf, 20, "unknown\n"); 1221 return get_fc_port_roles_names(rport->roles, buf); 1222 } 1223 } 1224 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 1225 show_fc_rport_roles, NULL); 1226 1227 static ssize_t fc_rport_set_marginal_state(struct device *dev, 1228 struct device_attribute *attr, 1229 const char *buf, size_t count) 1230 { 1231 struct fc_rport *rport = transport_class_to_rport(dev); 1232 enum fc_port_state port_state; 1233 int ret = 0; 1234 1235 ret = get_fc_port_state_match(buf, &port_state); 1236 if (ret) 1237 return -EINVAL; 1238 if (port_state == FC_PORTSTATE_MARGINAL) { 1239 /* 1240 * Change the state to Marginal only if the 1241 * current rport state is Online 1242 * Allow only Online->Marginal 1243 */ 1244 if (rport->port_state == FC_PORTSTATE_ONLINE) 1245 rport->port_state = port_state; 1246 else if (port_state != rport->port_state) 1247 return -EINVAL; 1248 } else if (port_state == FC_PORTSTATE_ONLINE) { 1249 /* 1250 * Change the state to Online only if the 1251 * current rport state is Marginal 1252 * Allow only Marginal->Online 1253 */ 1254 if (rport->port_state == FC_PORTSTATE_MARGINAL) 1255 rport->port_state = port_state; 1256 else if (port_state != rport->port_state) 1257 return -EINVAL; 1258 } else 1259 return -EINVAL; 1260 return count; 1261 } 1262 1263 static ssize_t 1264 show_fc_rport_port_state(struct device *dev, 1265 struct device_attribute *attr, char *buf) 1266 { 1267 const char *name; 1268 struct fc_rport *rport = transport_class_to_rport(dev); 1269 1270 name = get_fc_port_state_name(rport->port_state); 1271 if (!name) 1272 return -EINVAL; 1273 1274 return snprintf(buf, 20, "%s\n", name); 1275 } 1276 1277 static FC_DEVICE_ATTR(rport, port_state, 0444 | 0200, 1278 show_fc_rport_port_state, fc_rport_set_marginal_state); 1279 1280 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 1281 1282 /* 1283 * fast_io_fail_tmo attribute 1284 */ 1285 static ssize_t 1286 show_fc_rport_fast_io_fail_tmo (struct device *dev, 1287 struct device_attribute *attr, char *buf) 1288 { 1289 struct fc_rport *rport = transport_class_to_rport(dev); 1290 1291 if (rport->fast_io_fail_tmo == -1) 1292 return snprintf(buf, 5, "off\n"); 1293 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 1294 } 1295 1296 static ssize_t 1297 store_fc_rport_fast_io_fail_tmo(struct device *dev, 1298 struct device_attribute *attr, const char *buf, 1299 size_t count) 1300 { 1301 int val; 1302 char *cp; 1303 struct fc_rport *rport = transport_class_to_rport(dev); 1304 1305 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 1306 (rport->port_state == FC_PORTSTATE_DELETED) || 1307 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 1308 return -EBUSY; 1309 if (strncmp(buf, "off", 3) == 0) 1310 rport->fast_io_fail_tmo = -1; 1311 else { 1312 val = simple_strtoul(buf, &cp, 0); 1313 if ((*cp && (*cp != '\n')) || (val < 0)) 1314 return -EINVAL; 1315 /* 1316 * Cap fast_io_fail by dev_loss_tmo or 1317 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 1318 */ 1319 if ((val >= rport->dev_loss_tmo) || 1320 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 1321 return -EINVAL; 1322 1323 rport->fast_io_fail_tmo = val; 1324 } 1325 return count; 1326 } 1327 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 1328 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 1329 1330 #define fc_rport_fpin_statistic(name) \ 1331 static ssize_t fc_rport_fpinstat_##name(struct device *cd, \ 1332 struct device_attribute *attr, \ 1333 char *buf) \ 1334 { \ 1335 struct fc_rport *rport = transport_class_to_rport(cd); \ 1336 \ 1337 return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \ 1338 } \ 1339 static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL) 1340 1341 fc_rport_fpin_statistic(dn); 1342 fc_rport_fpin_statistic(dn_unknown); 1343 fc_rport_fpin_statistic(dn_timeout); 1344 fc_rport_fpin_statistic(dn_unable_to_route); 1345 fc_rport_fpin_statistic(dn_device_specific); 1346 fc_rport_fpin_statistic(cn); 1347 fc_rport_fpin_statistic(cn_clear); 1348 fc_rport_fpin_statistic(cn_lost_credit); 1349 fc_rport_fpin_statistic(cn_credit_stall); 1350 fc_rport_fpin_statistic(cn_oversubscription); 1351 fc_rport_fpin_statistic(cn_device_specific); 1352 fc_rport_fpin_statistic(li); 1353 fc_rport_fpin_statistic(li_failure_unknown); 1354 fc_rport_fpin_statistic(li_link_failure_count); 1355 fc_rport_fpin_statistic(li_loss_of_sync_count); 1356 fc_rport_fpin_statistic(li_loss_of_signals_count); 1357 fc_rport_fpin_statistic(li_prim_seq_err_count); 1358 fc_rport_fpin_statistic(li_invalid_tx_word_count); 1359 fc_rport_fpin_statistic(li_invalid_crc_count); 1360 fc_rport_fpin_statistic(li_device_specific); 1361 1362 static struct attribute *fc_rport_statistics_attrs[] = { 1363 &device_attr_rport_fpin_dn.attr, 1364 &device_attr_rport_fpin_dn_unknown.attr, 1365 &device_attr_rport_fpin_dn_timeout.attr, 1366 &device_attr_rport_fpin_dn_unable_to_route.attr, 1367 &device_attr_rport_fpin_dn_device_specific.attr, 1368 &device_attr_rport_fpin_li.attr, 1369 &device_attr_rport_fpin_li_failure_unknown.attr, 1370 &device_attr_rport_fpin_li_link_failure_count.attr, 1371 &device_attr_rport_fpin_li_loss_of_sync_count.attr, 1372 &device_attr_rport_fpin_li_loss_of_signals_count.attr, 1373 &device_attr_rport_fpin_li_prim_seq_err_count.attr, 1374 &device_attr_rport_fpin_li_invalid_tx_word_count.attr, 1375 &device_attr_rport_fpin_li_invalid_crc_count.attr, 1376 &device_attr_rport_fpin_li_device_specific.attr, 1377 &device_attr_rport_fpin_cn.attr, 1378 &device_attr_rport_fpin_cn_clear.attr, 1379 &device_attr_rport_fpin_cn_lost_credit.attr, 1380 &device_attr_rport_fpin_cn_credit_stall.attr, 1381 &device_attr_rport_fpin_cn_oversubscription.attr, 1382 &device_attr_rport_fpin_cn_device_specific.attr, 1383 NULL 1384 }; 1385 1386 static struct attribute_group fc_rport_statistics_group = { 1387 .name = "statistics", 1388 .attrs = fc_rport_statistics_attrs, 1389 }; 1390 1391 1392 /* 1393 * FC SCSI Target Attribute Management 1394 */ 1395 1396 /* 1397 * Note: in the target show function we recognize when the remote 1398 * port is in the hierarchy and do not allow the driver to get 1399 * involved in sysfs functions. The driver only gets involved if 1400 * it's the "old" style that doesn't use rports. 1401 */ 1402 #define fc_starget_show_function(field, format_string, sz, cast) \ 1403 static ssize_t \ 1404 show_fc_starget_##field (struct device *dev, \ 1405 struct device_attribute *attr, char *buf) \ 1406 { \ 1407 struct scsi_target *starget = transport_class_to_starget(dev); \ 1408 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1409 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1410 struct fc_rport *rport = starget_to_rport(starget); \ 1411 if (rport) \ 1412 fc_starget_##field(starget) = rport->field; \ 1413 else if (i->f->get_starget_##field) \ 1414 i->f->get_starget_##field(starget); \ 1415 return snprintf(buf, sz, format_string, \ 1416 cast fc_starget_##field(starget)); \ 1417 } 1418 1419 #define fc_starget_rd_attr(field, format_string, sz) \ 1420 fc_starget_show_function(field, format_string, sz, ) \ 1421 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1422 show_fc_starget_##field, NULL) 1423 1424 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1425 fc_starget_show_function(field, format_string, sz, (cast)) \ 1426 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1427 show_fc_starget_##field, NULL) 1428 1429 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1430 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1431 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1432 i->private_starget_attrs[count].store = NULL; \ 1433 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1434 if (i->f->show_starget_##field) \ 1435 count++ 1436 1437 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1438 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1439 if (!i->f->set_starget_##field) { \ 1440 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1441 i->private_starget_attrs[count].store = NULL; \ 1442 } \ 1443 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1444 if (i->f->show_starget_##field) \ 1445 count++ 1446 1447 /* The FC Transport SCSI Target Attributes: */ 1448 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1449 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1450 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1451 1452 1453 /* 1454 * FC Virtual Port Attribute Management 1455 */ 1456 1457 #define fc_vport_show_function(field, format_string, sz, cast) \ 1458 static ssize_t \ 1459 show_fc_vport_##field (struct device *dev, \ 1460 struct device_attribute *attr, char *buf) \ 1461 { \ 1462 struct fc_vport *vport = transport_class_to_vport(dev); \ 1463 struct Scsi_Host *shost = vport_to_shost(vport); \ 1464 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1465 if ((i->f->get_vport_##field) && \ 1466 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1467 i->f->get_vport_##field(vport); \ 1468 return snprintf(buf, sz, format_string, cast vport->field); \ 1469 } 1470 1471 #define fc_vport_store_function(field) \ 1472 static ssize_t \ 1473 store_fc_vport_##field(struct device *dev, \ 1474 struct device_attribute *attr, \ 1475 const char *buf, size_t count) \ 1476 { \ 1477 int val; \ 1478 struct fc_vport *vport = transport_class_to_vport(dev); \ 1479 struct Scsi_Host *shost = vport_to_shost(vport); \ 1480 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1481 char *cp; \ 1482 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1483 return -EBUSY; \ 1484 val = simple_strtoul(buf, &cp, 0); \ 1485 if (*cp && (*cp != '\n')) \ 1486 return -EINVAL; \ 1487 i->f->set_vport_##field(vport, val); \ 1488 return count; \ 1489 } 1490 1491 #define fc_vport_store_str_function(field, slen) \ 1492 static ssize_t \ 1493 store_fc_vport_##field(struct device *dev, \ 1494 struct device_attribute *attr, \ 1495 const char *buf, size_t count) \ 1496 { \ 1497 struct fc_vport *vport = transport_class_to_vport(dev); \ 1498 struct Scsi_Host *shost = vport_to_shost(vport); \ 1499 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1500 unsigned int cnt=count; \ 1501 \ 1502 /* count may include a LF at end of string */ \ 1503 if (buf[cnt-1] == '\n') \ 1504 cnt--; \ 1505 if (cnt > ((slen) - 1)) \ 1506 return -EINVAL; \ 1507 memcpy(vport->field, buf, cnt); \ 1508 i->f->set_vport_##field(vport); \ 1509 return count; \ 1510 } 1511 1512 #define fc_vport_rd_attr(field, format_string, sz) \ 1513 fc_vport_show_function(field, format_string, sz, ) \ 1514 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1515 show_fc_vport_##field, NULL) 1516 1517 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1518 fc_vport_show_function(field, format_string, sz, (cast)) \ 1519 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1520 show_fc_vport_##field, NULL) 1521 1522 #define fc_vport_rw_attr(field, format_string, sz) \ 1523 fc_vport_show_function(field, format_string, sz, ) \ 1524 fc_vport_store_function(field) \ 1525 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1526 show_fc_vport_##field, \ 1527 store_fc_vport_##field) 1528 1529 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1530 static ssize_t \ 1531 show_fc_vport_##field (struct device *dev, \ 1532 struct device_attribute *attr, char *buf) \ 1533 { \ 1534 struct fc_vport *vport = transport_class_to_vport(dev); \ 1535 return snprintf(buf, sz, format_string, cast vport->field); \ 1536 } 1537 1538 #define fc_private_vport_store_u32_function(field) \ 1539 static ssize_t \ 1540 store_fc_vport_##field(struct device *dev, \ 1541 struct device_attribute *attr, \ 1542 const char *buf, size_t count) \ 1543 { \ 1544 u32 val; \ 1545 struct fc_vport *vport = transport_class_to_vport(dev); \ 1546 char *cp; \ 1547 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1548 return -EBUSY; \ 1549 val = simple_strtoul(buf, &cp, 0); \ 1550 if (*cp && (*cp != '\n')) \ 1551 return -EINVAL; \ 1552 vport->field = val; \ 1553 return count; \ 1554 } 1555 1556 1557 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1558 fc_private_vport_show_function(field, format_string, sz, ) \ 1559 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1560 show_fc_vport_##field, NULL) 1561 1562 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1563 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1564 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1565 show_fc_vport_##field, NULL) 1566 1567 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1568 fc_private_vport_show_function(field, format_string, sz, ) \ 1569 fc_private_vport_store_u32_function(field) \ 1570 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1571 show_fc_vport_##field, \ 1572 store_fc_vport_##field) 1573 1574 1575 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1576 static ssize_t \ 1577 show_fc_vport_##title (struct device *dev, \ 1578 struct device_attribute *attr, \ 1579 char *buf) \ 1580 { \ 1581 struct fc_vport *vport = transport_class_to_vport(dev); \ 1582 const char *name; \ 1583 name = get_fc_##title##_name(vport->title); \ 1584 if (!name) \ 1585 return -EINVAL; \ 1586 return snprintf(buf, maxlen, "%s\n", name); \ 1587 } \ 1588 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1589 show_fc_vport_##title, NULL) 1590 1591 1592 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1593 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1594 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1595 i->private_vport_attrs[count].store = NULL; \ 1596 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1597 if (i->f->get_##field) \ 1598 count++ 1599 /* NOTE: Above MACRO differs: checks function not show bit */ 1600 1601 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1602 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1603 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1604 i->private_vport_attrs[count].store = NULL; \ 1605 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1606 count++ 1607 1608 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1609 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1610 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1611 if (i->f->field) \ 1612 count++ 1613 /* NOTE: Above MACRO differs: checks function */ 1614 1615 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1616 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1617 if (!i->f->set_vport_##field) { \ 1618 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1619 i->private_vport_attrs[count].store = NULL; \ 1620 } \ 1621 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1622 count++ 1623 /* NOTE: Above MACRO differs: does not check show bit */ 1624 1625 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1626 { \ 1627 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1628 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1629 count++; \ 1630 } 1631 1632 1633 /* The FC Transport Virtual Port Attributes: */ 1634 1635 /* Fixed Virtual Port Attributes */ 1636 1637 /* Dynamic Virtual Port Attributes */ 1638 1639 /* Private Virtual Port Attributes */ 1640 1641 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1642 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1643 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1644 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1645 1646 static ssize_t 1647 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1648 char *buf) 1649 { 1650 struct fc_vport *vport = transport_class_to_vport(dev); 1651 1652 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1653 return snprintf(buf, 20, "unknown\n"); 1654 return get_fc_port_roles_names(vport->roles, buf); 1655 } 1656 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1657 1658 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1659 1660 fc_private_vport_show_function(symbolic_name, "%s\n", 1661 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1662 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1663 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1664 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1665 1666 static ssize_t 1667 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1668 const char *buf, size_t count) 1669 { 1670 struct fc_vport *vport = transport_class_to_vport(dev); 1671 struct Scsi_Host *shost = vport_to_shost(vport); 1672 unsigned long flags; 1673 1674 spin_lock_irqsave(shost->host_lock, flags); 1675 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1676 spin_unlock_irqrestore(shost->host_lock, flags); 1677 return -EBUSY; 1678 } 1679 vport->flags |= FC_VPORT_DELETING; 1680 spin_unlock_irqrestore(shost->host_lock, flags); 1681 1682 fc_queue_work(shost, &vport->vport_delete_work); 1683 return count; 1684 } 1685 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1686 NULL, store_fc_vport_delete); 1687 1688 1689 /* 1690 * Enable/Disable vport 1691 * Write "1" to disable, write "0" to enable 1692 */ 1693 static ssize_t 1694 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1695 const char *buf, 1696 size_t count) 1697 { 1698 struct fc_vport *vport = transport_class_to_vport(dev); 1699 struct Scsi_Host *shost = vport_to_shost(vport); 1700 struct fc_internal *i = to_fc_internal(shost->transportt); 1701 int stat; 1702 1703 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1704 return -EBUSY; 1705 1706 if (*buf == '0') { 1707 if (vport->vport_state != FC_VPORT_DISABLED) 1708 return -EALREADY; 1709 } else if (*buf == '1') { 1710 if (vport->vport_state == FC_VPORT_DISABLED) 1711 return -EALREADY; 1712 } else 1713 return -EINVAL; 1714 1715 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1716 return stat ? stat : count; 1717 } 1718 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1719 NULL, store_fc_vport_disable); 1720 1721 1722 /* 1723 * Host Attribute Management 1724 */ 1725 1726 #define fc_host_show_function(field, format_string, sz, cast) \ 1727 static ssize_t \ 1728 show_fc_host_##field (struct device *dev, \ 1729 struct device_attribute *attr, char *buf) \ 1730 { \ 1731 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1732 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1733 if (i->f->get_host_##field) \ 1734 i->f->get_host_##field(shost); \ 1735 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1736 } 1737 1738 #define fc_host_store_function(field) \ 1739 static ssize_t \ 1740 store_fc_host_##field(struct device *dev, \ 1741 struct device_attribute *attr, \ 1742 const char *buf, size_t count) \ 1743 { \ 1744 int val; \ 1745 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1746 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1747 char *cp; \ 1748 \ 1749 val = simple_strtoul(buf, &cp, 0); \ 1750 if (*cp && (*cp != '\n')) \ 1751 return -EINVAL; \ 1752 i->f->set_host_##field(shost, val); \ 1753 return count; \ 1754 } 1755 1756 #define fc_host_store_str_function(field, slen) \ 1757 static ssize_t \ 1758 store_fc_host_##field(struct device *dev, \ 1759 struct device_attribute *attr, \ 1760 const char *buf, size_t count) \ 1761 { \ 1762 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1763 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1764 unsigned int cnt=count; \ 1765 \ 1766 /* count may include a LF at end of string */ \ 1767 if (buf[cnt-1] == '\n') \ 1768 cnt--; \ 1769 if (cnt > ((slen) - 1)) \ 1770 return -EINVAL; \ 1771 memcpy(fc_host_##field(shost), buf, cnt); \ 1772 i->f->set_host_##field(shost); \ 1773 return count; \ 1774 } 1775 1776 #define fc_host_rd_attr(field, format_string, sz) \ 1777 fc_host_show_function(field, format_string, sz, ) \ 1778 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1779 show_fc_host_##field, NULL) 1780 1781 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1782 fc_host_show_function(field, format_string, sz, (cast)) \ 1783 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1784 show_fc_host_##field, NULL) 1785 1786 #define fc_host_rw_attr(field, format_string, sz) \ 1787 fc_host_show_function(field, format_string, sz, ) \ 1788 fc_host_store_function(field) \ 1789 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1790 show_fc_host_##field, \ 1791 store_fc_host_##field) 1792 1793 #define fc_host_rd_enum_attr(title, maxlen) \ 1794 static ssize_t \ 1795 show_fc_host_##title (struct device *dev, \ 1796 struct device_attribute *attr, char *buf) \ 1797 { \ 1798 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1799 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1800 const char *name; \ 1801 if (i->f->get_host_##title) \ 1802 i->f->get_host_##title(shost); \ 1803 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1804 if (!name) \ 1805 return -EINVAL; \ 1806 return snprintf(buf, maxlen, "%s\n", name); \ 1807 } \ 1808 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1809 1810 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1811 i->private_host_attrs[count] = device_attr_host_##field; \ 1812 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1813 i->private_host_attrs[count].store = NULL; \ 1814 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1815 if (i->f->show_host_##field) \ 1816 count++ 1817 1818 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1819 i->private_host_attrs[count] = device_attr_host_##field; \ 1820 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1821 i->private_host_attrs[count].store = NULL; \ 1822 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1823 count++ 1824 1825 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1826 i->private_host_attrs[count] = device_attr_host_##field; \ 1827 if (!i->f->set_host_##field) { \ 1828 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1829 i->private_host_attrs[count].store = NULL; \ 1830 } \ 1831 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1832 if (i->f->show_host_##field) \ 1833 count++ 1834 1835 1836 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1837 static ssize_t \ 1838 show_fc_host_##field (struct device *dev, \ 1839 struct device_attribute *attr, char *buf) \ 1840 { \ 1841 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1842 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1843 } 1844 1845 #define fc_private_host_rd_attr(field, format_string, sz) \ 1846 fc_private_host_show_function(field, format_string, sz, ) \ 1847 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1848 show_fc_host_##field, NULL) 1849 1850 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1851 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1852 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1853 show_fc_host_##field, NULL) 1854 1855 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1856 i->private_host_attrs[count] = device_attr_host_##field; \ 1857 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1858 i->private_host_attrs[count].store = NULL; \ 1859 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1860 count++ 1861 1862 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1863 { \ 1864 i->private_host_attrs[count] = device_attr_host_##field; \ 1865 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1866 count++; \ 1867 } 1868 1869 1870 /* Fixed Host Attributes */ 1871 1872 static ssize_t 1873 show_fc_host_supported_classes (struct device *dev, 1874 struct device_attribute *attr, char *buf) 1875 { 1876 struct Scsi_Host *shost = transport_class_to_shost(dev); 1877 1878 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1879 return snprintf(buf, 20, "unspecified\n"); 1880 1881 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1882 } 1883 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1884 show_fc_host_supported_classes, NULL); 1885 1886 static ssize_t 1887 show_fc_host_supported_fc4s (struct device *dev, 1888 struct device_attribute *attr, char *buf) 1889 { 1890 struct Scsi_Host *shost = transport_class_to_shost(dev); 1891 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1892 } 1893 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1894 show_fc_host_supported_fc4s, NULL); 1895 1896 static ssize_t 1897 show_fc_host_supported_speeds (struct device *dev, 1898 struct device_attribute *attr, char *buf) 1899 { 1900 struct Scsi_Host *shost = transport_class_to_shost(dev); 1901 1902 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1903 return snprintf(buf, 20, "unknown\n"); 1904 1905 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1906 } 1907 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1908 show_fc_host_supported_speeds, NULL); 1909 1910 1911 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1912 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1913 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1914 unsigned long long); 1915 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1916 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1917 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1918 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1919 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1920 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1921 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1922 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1923 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1924 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1925 1926 1927 /* Dynamic Host Attributes */ 1928 1929 static ssize_t 1930 show_fc_host_active_fc4s (struct device *dev, 1931 struct device_attribute *attr, char *buf) 1932 { 1933 struct Scsi_Host *shost = transport_class_to_shost(dev); 1934 struct fc_internal *i = to_fc_internal(shost->transportt); 1935 1936 if (i->f->get_host_active_fc4s) 1937 i->f->get_host_active_fc4s(shost); 1938 1939 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1940 } 1941 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1942 show_fc_host_active_fc4s, NULL); 1943 1944 static ssize_t 1945 show_fc_host_speed (struct device *dev, 1946 struct device_attribute *attr, char *buf) 1947 { 1948 struct Scsi_Host *shost = transport_class_to_shost(dev); 1949 struct fc_internal *i = to_fc_internal(shost->transportt); 1950 1951 if (i->f->get_host_speed) 1952 i->f->get_host_speed(shost); 1953 1954 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1955 return snprintf(buf, 20, "unknown\n"); 1956 1957 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1958 } 1959 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1960 show_fc_host_speed, NULL); 1961 1962 1963 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1964 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1965 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1966 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1967 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1968 1969 fc_private_host_show_function(system_hostname, "%s\n", 1970 FC_SYMBOLIC_NAME_SIZE + 1, ) 1971 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1972 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1973 show_fc_host_system_hostname, store_fc_host_system_hostname); 1974 1975 1976 /* Private Host Attributes */ 1977 1978 static ssize_t 1979 show_fc_private_host_tgtid_bind_type(struct device *dev, 1980 struct device_attribute *attr, char *buf) 1981 { 1982 struct Scsi_Host *shost = transport_class_to_shost(dev); 1983 const char *name; 1984 1985 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1986 if (!name) 1987 return -EINVAL; 1988 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 1989 } 1990 1991 #define get_list_head_entry(pos, head, member) \ 1992 pos = list_entry((head)->next, typeof(*pos), member) 1993 1994 static ssize_t 1995 store_fc_private_host_tgtid_bind_type(struct device *dev, 1996 struct device_attribute *attr, const char *buf, size_t count) 1997 { 1998 struct Scsi_Host *shost = transport_class_to_shost(dev); 1999 struct fc_rport *rport; 2000 enum fc_tgtid_binding_type val; 2001 unsigned long flags; 2002 2003 if (get_fc_tgtid_bind_type_match(buf, &val)) 2004 return -EINVAL; 2005 2006 /* if changing bind type, purge all unused consistent bindings */ 2007 if (val != fc_host_tgtid_bind_type(shost)) { 2008 spin_lock_irqsave(shost->host_lock, flags); 2009 while (!list_empty(&fc_host_rport_bindings(shost))) { 2010 get_list_head_entry(rport, 2011 &fc_host_rport_bindings(shost), peers); 2012 list_del(&rport->peers); 2013 rport->port_state = FC_PORTSTATE_DELETED; 2014 fc_queue_work(shost, &rport->rport_delete_work); 2015 } 2016 spin_unlock_irqrestore(shost->host_lock, flags); 2017 } 2018 2019 fc_host_tgtid_bind_type(shost) = val; 2020 return count; 2021 } 2022 2023 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 2024 show_fc_private_host_tgtid_bind_type, 2025 store_fc_private_host_tgtid_bind_type); 2026 2027 static ssize_t 2028 store_fc_private_host_issue_lip(struct device *dev, 2029 struct device_attribute *attr, const char *buf, size_t count) 2030 { 2031 struct Scsi_Host *shost = transport_class_to_shost(dev); 2032 struct fc_internal *i = to_fc_internal(shost->transportt); 2033 int ret; 2034 2035 /* ignore any data value written to the attribute */ 2036 if (i->f->issue_fc_host_lip) { 2037 ret = i->f->issue_fc_host_lip(shost); 2038 return ret ? ret: count; 2039 } 2040 2041 return -ENOENT; 2042 } 2043 2044 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 2045 store_fc_private_host_issue_lip); 2046 2047 static ssize_t 2048 store_fc_private_host_dev_loss_tmo(struct device *dev, 2049 struct device_attribute *attr, 2050 const char *buf, size_t count) 2051 { 2052 struct Scsi_Host *shost = transport_class_to_shost(dev); 2053 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2054 struct fc_rport *rport; 2055 unsigned long val, flags; 2056 int rc; 2057 2058 rc = fc_str_to_dev_loss(buf, &val); 2059 if (rc) 2060 return rc; 2061 2062 fc_host_dev_loss_tmo(shost) = val; 2063 spin_lock_irqsave(shost->host_lock, flags); 2064 list_for_each_entry(rport, &fc_host->rports, peers) 2065 fc_rport_set_dev_loss_tmo(rport, val); 2066 spin_unlock_irqrestore(shost->host_lock, flags); 2067 return count; 2068 } 2069 2070 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 2071 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 2072 show_fc_host_dev_loss_tmo, 2073 store_fc_private_host_dev_loss_tmo); 2074 2075 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 2076 2077 /* 2078 * Host Statistics Management 2079 */ 2080 2081 /* Show a given attribute in the statistics group */ 2082 static ssize_t 2083 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 2084 { 2085 struct Scsi_Host *shost = transport_class_to_shost(dev); 2086 struct fc_internal *i = to_fc_internal(shost->transportt); 2087 struct fc_host_statistics *stats; 2088 ssize_t ret = -ENOENT; 2089 2090 if (offset > sizeof(struct fc_host_statistics) || 2091 offset % sizeof(u64) != 0) 2092 WARN_ON(1); 2093 2094 if (i->f->get_fc_host_stats) { 2095 stats = (i->f->get_fc_host_stats)(shost); 2096 if (stats) 2097 ret = snprintf(buf, 20, "0x%llx\n", 2098 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 2099 } 2100 return ret; 2101 } 2102 2103 2104 /* generate a read-only statistics attribute */ 2105 #define fc_host_statistic(name) \ 2106 static ssize_t show_fcstat_##name(struct device *cd, \ 2107 struct device_attribute *attr, \ 2108 char *buf) \ 2109 { \ 2110 return fc_stat_show(cd, buf, \ 2111 offsetof(struct fc_host_statistics, name)); \ 2112 } \ 2113 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 2114 2115 fc_host_statistic(seconds_since_last_reset); 2116 fc_host_statistic(tx_frames); 2117 fc_host_statistic(tx_words); 2118 fc_host_statistic(rx_frames); 2119 fc_host_statistic(rx_words); 2120 fc_host_statistic(lip_count); 2121 fc_host_statistic(nos_count); 2122 fc_host_statistic(error_frames); 2123 fc_host_statistic(dumped_frames); 2124 fc_host_statistic(link_failure_count); 2125 fc_host_statistic(loss_of_sync_count); 2126 fc_host_statistic(loss_of_signal_count); 2127 fc_host_statistic(prim_seq_protocol_err_count); 2128 fc_host_statistic(invalid_tx_word_count); 2129 fc_host_statistic(invalid_crc_count); 2130 fc_host_statistic(fcp_input_requests); 2131 fc_host_statistic(fcp_output_requests); 2132 fc_host_statistic(fcp_control_requests); 2133 fc_host_statistic(fcp_input_megabytes); 2134 fc_host_statistic(fcp_output_megabytes); 2135 fc_host_statistic(fcp_packet_alloc_failures); 2136 fc_host_statistic(fcp_packet_aborts); 2137 fc_host_statistic(fcp_frame_alloc_failures); 2138 fc_host_statistic(fc_no_free_exch); 2139 fc_host_statistic(fc_no_free_exch_xid); 2140 fc_host_statistic(fc_xid_not_found); 2141 fc_host_statistic(fc_xid_busy); 2142 fc_host_statistic(fc_seq_not_found); 2143 fc_host_statistic(fc_non_bls_resp); 2144 fc_host_statistic(cn_sig_warn); 2145 fc_host_statistic(cn_sig_alarm); 2146 2147 2148 #define fc_host_fpin_statistic(name) \ 2149 static ssize_t fc_host_fpinstat_##name(struct device *cd, \ 2150 struct device_attribute *attr, \ 2151 char *buf) \ 2152 { \ 2153 struct Scsi_Host *shost = transport_class_to_shost(cd); \ 2154 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \ 2155 \ 2156 return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \ 2157 } \ 2158 static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL) 2159 2160 fc_host_fpin_statistic(dn); 2161 fc_host_fpin_statistic(dn_unknown); 2162 fc_host_fpin_statistic(dn_timeout); 2163 fc_host_fpin_statistic(dn_unable_to_route); 2164 fc_host_fpin_statistic(dn_device_specific); 2165 fc_host_fpin_statistic(cn); 2166 fc_host_fpin_statistic(cn_clear); 2167 fc_host_fpin_statistic(cn_lost_credit); 2168 fc_host_fpin_statistic(cn_credit_stall); 2169 fc_host_fpin_statistic(cn_oversubscription); 2170 fc_host_fpin_statistic(cn_device_specific); 2171 fc_host_fpin_statistic(li); 2172 fc_host_fpin_statistic(li_failure_unknown); 2173 fc_host_fpin_statistic(li_link_failure_count); 2174 fc_host_fpin_statistic(li_loss_of_sync_count); 2175 fc_host_fpin_statistic(li_loss_of_signals_count); 2176 fc_host_fpin_statistic(li_prim_seq_err_count); 2177 fc_host_fpin_statistic(li_invalid_tx_word_count); 2178 fc_host_fpin_statistic(li_invalid_crc_count); 2179 fc_host_fpin_statistic(li_device_specific); 2180 2181 static ssize_t 2182 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 2183 const char *buf, size_t count) 2184 { 2185 struct Scsi_Host *shost = transport_class_to_shost(dev); 2186 struct fc_internal *i = to_fc_internal(shost->transportt); 2187 2188 /* ignore any data value written to the attribute */ 2189 if (i->f->reset_fc_host_stats) { 2190 i->f->reset_fc_host_stats(shost); 2191 return count; 2192 } 2193 2194 return -ENOENT; 2195 } 2196 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 2197 fc_reset_statistics); 2198 2199 static struct attribute *fc_statistics_attrs[] = { 2200 &device_attr_host_seconds_since_last_reset.attr, 2201 &device_attr_host_tx_frames.attr, 2202 &device_attr_host_tx_words.attr, 2203 &device_attr_host_rx_frames.attr, 2204 &device_attr_host_rx_words.attr, 2205 &device_attr_host_lip_count.attr, 2206 &device_attr_host_nos_count.attr, 2207 &device_attr_host_error_frames.attr, 2208 &device_attr_host_dumped_frames.attr, 2209 &device_attr_host_link_failure_count.attr, 2210 &device_attr_host_loss_of_sync_count.attr, 2211 &device_attr_host_loss_of_signal_count.attr, 2212 &device_attr_host_prim_seq_protocol_err_count.attr, 2213 &device_attr_host_invalid_tx_word_count.attr, 2214 &device_attr_host_invalid_crc_count.attr, 2215 &device_attr_host_fcp_input_requests.attr, 2216 &device_attr_host_fcp_output_requests.attr, 2217 &device_attr_host_fcp_control_requests.attr, 2218 &device_attr_host_fcp_input_megabytes.attr, 2219 &device_attr_host_fcp_output_megabytes.attr, 2220 &device_attr_host_fcp_packet_alloc_failures.attr, 2221 &device_attr_host_fcp_packet_aborts.attr, 2222 &device_attr_host_fcp_frame_alloc_failures.attr, 2223 &device_attr_host_fc_no_free_exch.attr, 2224 &device_attr_host_fc_no_free_exch_xid.attr, 2225 &device_attr_host_fc_xid_not_found.attr, 2226 &device_attr_host_fc_xid_busy.attr, 2227 &device_attr_host_fc_seq_not_found.attr, 2228 &device_attr_host_fc_non_bls_resp.attr, 2229 &device_attr_host_cn_sig_warn.attr, 2230 &device_attr_host_cn_sig_alarm.attr, 2231 &device_attr_host_reset_statistics.attr, 2232 &device_attr_host_fpin_dn.attr, 2233 &device_attr_host_fpin_dn_unknown.attr, 2234 &device_attr_host_fpin_dn_timeout.attr, 2235 &device_attr_host_fpin_dn_unable_to_route.attr, 2236 &device_attr_host_fpin_dn_device_specific.attr, 2237 &device_attr_host_fpin_li.attr, 2238 &device_attr_host_fpin_li_failure_unknown.attr, 2239 &device_attr_host_fpin_li_link_failure_count.attr, 2240 &device_attr_host_fpin_li_loss_of_sync_count.attr, 2241 &device_attr_host_fpin_li_loss_of_signals_count.attr, 2242 &device_attr_host_fpin_li_prim_seq_err_count.attr, 2243 &device_attr_host_fpin_li_invalid_tx_word_count.attr, 2244 &device_attr_host_fpin_li_invalid_crc_count.attr, 2245 &device_attr_host_fpin_li_device_specific.attr, 2246 &device_attr_host_fpin_cn.attr, 2247 &device_attr_host_fpin_cn_clear.attr, 2248 &device_attr_host_fpin_cn_lost_credit.attr, 2249 &device_attr_host_fpin_cn_credit_stall.attr, 2250 &device_attr_host_fpin_cn_oversubscription.attr, 2251 &device_attr_host_fpin_cn_device_specific.attr, 2252 NULL 2253 }; 2254 2255 static struct attribute_group fc_statistics_group = { 2256 .name = "statistics", 2257 .attrs = fc_statistics_attrs, 2258 }; 2259 2260 2261 /* Host Vport Attributes */ 2262 2263 static int 2264 fc_parse_wwn(const char *ns, u64 *nm) 2265 { 2266 unsigned int i, j; 2267 u8 wwn[8]; 2268 2269 memset(wwn, 0, sizeof(wwn)); 2270 2271 /* Validate and store the new name */ 2272 for (i=0, j=0; i < 16; i++) { 2273 int value; 2274 2275 value = hex_to_bin(*ns++); 2276 if (value >= 0) 2277 j = (j << 4) | value; 2278 else 2279 return -EINVAL; 2280 if (i % 2) { 2281 wwn[i/2] = j & 0xff; 2282 j = 0; 2283 } 2284 } 2285 2286 *nm = wwn_to_u64(wwn); 2287 2288 return 0; 2289 } 2290 2291 2292 /* 2293 * "Short-cut" sysfs variable to create a new vport on a FC Host. 2294 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 2295 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 2296 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 2297 */ 2298 static ssize_t 2299 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 2300 const char *buf, size_t count) 2301 { 2302 struct Scsi_Host *shost = transport_class_to_shost(dev); 2303 struct fc_vport_identifiers vid; 2304 struct fc_vport *vport; 2305 unsigned int cnt=count; 2306 int stat; 2307 2308 memset(&vid, 0, sizeof(vid)); 2309 2310 /* count may include a LF at end of string */ 2311 if (buf[cnt-1] == '\n') 2312 cnt--; 2313 2314 /* validate we have enough characters for WWPN */ 2315 if ((cnt != (16+1+16)) || (buf[16] != ':')) 2316 return -EINVAL; 2317 2318 stat = fc_parse_wwn(&buf[0], &vid.port_name); 2319 if (stat) 2320 return stat; 2321 2322 stat = fc_parse_wwn(&buf[17], &vid.node_name); 2323 if (stat) 2324 return stat; 2325 2326 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 2327 vid.vport_type = FC_PORTTYPE_NPIV; 2328 /* vid.symbolic_name is already zero/NULL's */ 2329 vid.disable = false; /* always enabled */ 2330 2331 /* we only allow support on Channel 0 !!! */ 2332 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 2333 return stat ? stat : count; 2334 } 2335 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 2336 store_fc_host_vport_create); 2337 2338 2339 /* 2340 * "Short-cut" sysfs variable to delete a vport on a FC Host. 2341 * Vport is identified by a string containing "<WWPN>:<WWNN>". 2342 * The WWNs are specified as hex characters, and may *not* contain 2343 * any prefixes (e.g. 0x, x, etc) 2344 */ 2345 static ssize_t 2346 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 2347 const char *buf, size_t count) 2348 { 2349 struct Scsi_Host *shost = transport_class_to_shost(dev); 2350 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2351 struct fc_vport *vport; 2352 u64 wwpn, wwnn; 2353 unsigned long flags; 2354 unsigned int cnt=count; 2355 int stat, match; 2356 2357 /* count may include a LF at end of string */ 2358 if (buf[cnt-1] == '\n') 2359 cnt--; 2360 2361 /* validate we have enough characters for WWPN */ 2362 if ((cnt != (16+1+16)) || (buf[16] != ':')) 2363 return -EINVAL; 2364 2365 stat = fc_parse_wwn(&buf[0], &wwpn); 2366 if (stat) 2367 return stat; 2368 2369 stat = fc_parse_wwn(&buf[17], &wwnn); 2370 if (stat) 2371 return stat; 2372 2373 spin_lock_irqsave(shost->host_lock, flags); 2374 match = 0; 2375 /* we only allow support on Channel 0 !!! */ 2376 list_for_each_entry(vport, &fc_host->vports, peers) { 2377 if ((vport->channel == 0) && 2378 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 2379 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 2380 break; 2381 vport->flags |= FC_VPORT_DELETING; 2382 match = 1; 2383 break; 2384 } 2385 } 2386 spin_unlock_irqrestore(shost->host_lock, flags); 2387 2388 if (!match) 2389 return -ENODEV; 2390 2391 stat = fc_vport_terminate(vport); 2392 return stat ? stat : count; 2393 } 2394 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 2395 store_fc_host_vport_delete); 2396 2397 2398 static int fc_host_match(struct attribute_container *cont, 2399 struct device *dev) 2400 { 2401 struct Scsi_Host *shost; 2402 struct fc_internal *i; 2403 2404 if (!scsi_is_host_device(dev)) 2405 return 0; 2406 2407 shost = dev_to_shost(dev); 2408 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2409 != &fc_host_class.class) 2410 return 0; 2411 2412 i = to_fc_internal(shost->transportt); 2413 2414 return &i->t.host_attrs.ac == cont; 2415 } 2416 2417 static int fc_target_match(struct attribute_container *cont, 2418 struct device *dev) 2419 { 2420 struct Scsi_Host *shost; 2421 struct fc_internal *i; 2422 2423 if (!scsi_is_target_device(dev)) 2424 return 0; 2425 2426 shost = dev_to_shost(dev->parent); 2427 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2428 != &fc_host_class.class) 2429 return 0; 2430 2431 i = to_fc_internal(shost->transportt); 2432 2433 return &i->t.target_attrs.ac == cont; 2434 } 2435 2436 static void fc_rport_dev_release(struct device *dev) 2437 { 2438 struct fc_rport *rport = dev_to_rport(dev); 2439 put_device(dev->parent); 2440 kfree(rport); 2441 } 2442 2443 int scsi_is_fc_rport(const struct device *dev) 2444 { 2445 return dev->release == fc_rport_dev_release; 2446 } 2447 EXPORT_SYMBOL(scsi_is_fc_rport); 2448 2449 static int fc_rport_match(struct attribute_container *cont, 2450 struct device *dev) 2451 { 2452 struct Scsi_Host *shost; 2453 struct fc_internal *i; 2454 2455 if (!scsi_is_fc_rport(dev)) 2456 return 0; 2457 2458 shost = dev_to_shost(dev->parent); 2459 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2460 != &fc_host_class.class) 2461 return 0; 2462 2463 i = to_fc_internal(shost->transportt); 2464 2465 return &i->rport_attr_cont.ac == cont; 2466 } 2467 2468 2469 static void fc_vport_dev_release(struct device *dev) 2470 { 2471 struct fc_vport *vport = dev_to_vport(dev); 2472 put_device(dev->parent); /* release kobj parent */ 2473 kfree(vport); 2474 } 2475 2476 static int scsi_is_fc_vport(const struct device *dev) 2477 { 2478 return dev->release == fc_vport_dev_release; 2479 } 2480 2481 static int fc_vport_match(struct attribute_container *cont, 2482 struct device *dev) 2483 { 2484 struct fc_vport *vport; 2485 struct Scsi_Host *shost; 2486 struct fc_internal *i; 2487 2488 if (!scsi_is_fc_vport(dev)) 2489 return 0; 2490 vport = dev_to_vport(dev); 2491 2492 shost = vport_to_shost(vport); 2493 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2494 != &fc_host_class.class) 2495 return 0; 2496 2497 i = to_fc_internal(shost->transportt); 2498 return &i->vport_attr_cont.ac == cont; 2499 } 2500 2501 2502 /** 2503 * fc_eh_timed_out - FC Transport I/O timeout intercept handler 2504 * @scmd: The SCSI command which timed out 2505 * 2506 * This routine protects against error handlers getting invoked while a 2507 * rport is in a blocked state, typically due to a temporarily loss of 2508 * connectivity. If the error handlers are allowed to proceed, requests 2509 * to abort i/o, reset the target, etc will likely fail as there is no way 2510 * to communicate with the device to perform the requested function. These 2511 * failures may result in the midlayer taking the device offline, requiring 2512 * manual intervention to restore operation. 2513 * 2514 * This routine, called whenever an i/o times out, validates the state of 2515 * the underlying rport. If the rport is blocked, it returns 2516 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2517 * Eventually, either the device will return, or devloss_tmo will fire, 2518 * and when the timeout then fires, it will be handled normally. 2519 * If the rport is not blocked, normal error handling continues. 2520 * 2521 * Notes: 2522 * This routine assumes no locks are held on entry. 2523 */ 2524 enum scsi_timeout_action fc_eh_timed_out(struct scsi_cmnd *scmd) 2525 { 2526 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2527 2528 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2529 return SCSI_EH_RESET_TIMER; 2530 2531 return SCSI_EH_NOT_HANDLED; 2532 } 2533 EXPORT_SYMBOL(fc_eh_timed_out); 2534 2535 /* 2536 * Called by fc_user_scan to locate an rport on the shost that 2537 * matches the channel and target id, and invoke scsi_scan_target() 2538 * on the rport. 2539 */ 2540 static void 2541 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2542 { 2543 struct fc_rport *rport; 2544 unsigned long flags; 2545 2546 spin_lock_irqsave(shost->host_lock, flags); 2547 2548 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2549 if (rport->scsi_target_id == -1) 2550 continue; 2551 2552 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 2553 (rport->port_state != FC_PORTSTATE_MARGINAL)) 2554 continue; 2555 2556 if ((channel == rport->channel) && 2557 (id == rport->scsi_target_id)) { 2558 spin_unlock_irqrestore(shost->host_lock, flags); 2559 scsi_scan_target(&rport->dev, channel, id, lun, 2560 SCSI_SCAN_MANUAL); 2561 return; 2562 } 2563 } 2564 2565 spin_unlock_irqrestore(shost->host_lock, flags); 2566 } 2567 2568 /* 2569 * Called via sysfs scan routines. Necessary, as the FC transport 2570 * wants to place all target objects below the rport object. So this 2571 * routine must invoke the scsi_scan_target() routine with the rport 2572 * object as the parent. 2573 */ 2574 static int 2575 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2576 { 2577 uint chlo, chhi; 2578 uint tgtlo, tgthi; 2579 2580 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2581 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2582 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2583 return -EINVAL; 2584 2585 if (channel == SCAN_WILD_CARD) { 2586 chlo = 0; 2587 chhi = shost->max_channel + 1; 2588 } else { 2589 chlo = channel; 2590 chhi = channel + 1; 2591 } 2592 2593 if (id == SCAN_WILD_CARD) { 2594 tgtlo = 0; 2595 tgthi = shost->max_id; 2596 } else { 2597 tgtlo = id; 2598 tgthi = id + 1; 2599 } 2600 2601 for ( ; chlo < chhi; chlo++) 2602 for ( ; tgtlo < tgthi; tgtlo++) 2603 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2604 2605 return 0; 2606 } 2607 2608 struct scsi_transport_template * 2609 fc_attach_transport(struct fc_function_template *ft) 2610 { 2611 int count; 2612 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2613 GFP_KERNEL); 2614 2615 if (unlikely(!i)) 2616 return NULL; 2617 2618 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2619 i->t.target_attrs.ac.class = &fc_transport_class.class; 2620 i->t.target_attrs.ac.match = fc_target_match; 2621 i->t.target_size = sizeof(struct fc_starget_attrs); 2622 transport_container_register(&i->t.target_attrs); 2623 2624 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2625 i->t.host_attrs.ac.class = &fc_host_class.class; 2626 i->t.host_attrs.ac.match = fc_host_match; 2627 i->t.host_size = sizeof(struct fc_host_attrs); 2628 if (ft->get_fc_host_stats) 2629 i->t.host_attrs.statistics = &fc_statistics_group; 2630 transport_container_register(&i->t.host_attrs); 2631 2632 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2633 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2634 i->rport_attr_cont.ac.match = fc_rport_match; 2635 i->rport_attr_cont.statistics = &fc_rport_statistics_group; 2636 transport_container_register(&i->rport_attr_cont); 2637 2638 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2639 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2640 i->vport_attr_cont.ac.match = fc_vport_match; 2641 transport_container_register(&i->vport_attr_cont); 2642 2643 i->f = ft; 2644 2645 /* Transport uses the shost workq for scsi scanning */ 2646 i->t.create_work_queue = 1; 2647 2648 i->t.user_scan = fc_user_scan; 2649 2650 /* 2651 * Setup SCSI Target Attributes. 2652 */ 2653 count = 0; 2654 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2655 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2656 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2657 2658 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2659 2660 i->starget_attrs[count] = NULL; 2661 2662 2663 /* 2664 * Setup SCSI Host Attributes. 2665 */ 2666 count=0; 2667 SETUP_HOST_ATTRIBUTE_RD(node_name); 2668 SETUP_HOST_ATTRIBUTE_RD(port_name); 2669 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2670 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2671 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2672 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2673 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2674 if (ft->vport_create) { 2675 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2676 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2677 } 2678 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2679 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2680 SETUP_HOST_ATTRIBUTE_RD(model); 2681 SETUP_HOST_ATTRIBUTE_RD(model_description); 2682 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2683 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2684 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2685 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2686 2687 SETUP_HOST_ATTRIBUTE_RD(port_id); 2688 SETUP_HOST_ATTRIBUTE_RD(port_type); 2689 SETUP_HOST_ATTRIBUTE_RD(port_state); 2690 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2691 SETUP_HOST_ATTRIBUTE_RD(speed); 2692 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2693 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2694 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2695 2696 /* Transport-managed attributes */ 2697 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2698 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2699 if (ft->issue_fc_host_lip) 2700 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2701 if (ft->vport_create) 2702 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2703 if (ft->vport_delete) 2704 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2705 2706 BUG_ON(count > FC_HOST_NUM_ATTRS); 2707 2708 i->host_attrs[count] = NULL; 2709 2710 /* 2711 * Setup Remote Port Attributes. 2712 */ 2713 count=0; 2714 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2715 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2716 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2717 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2718 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2719 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2720 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2721 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(port_state); 2722 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2723 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2724 2725 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2726 2727 i->rport_attrs[count] = NULL; 2728 2729 /* 2730 * Setup Virtual Port Attributes. 2731 */ 2732 count=0; 2733 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2734 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2735 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2736 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2737 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2738 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2739 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2740 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2741 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2742 2743 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2744 2745 i->vport_attrs[count] = NULL; 2746 2747 return &i->t; 2748 } 2749 EXPORT_SYMBOL(fc_attach_transport); 2750 2751 void fc_release_transport(struct scsi_transport_template *t) 2752 { 2753 struct fc_internal *i = to_fc_internal(t); 2754 2755 transport_container_unregister(&i->t.target_attrs); 2756 transport_container_unregister(&i->t.host_attrs); 2757 transport_container_unregister(&i->rport_attr_cont); 2758 transport_container_unregister(&i->vport_attr_cont); 2759 2760 kfree(i); 2761 } 2762 EXPORT_SYMBOL(fc_release_transport); 2763 2764 /** 2765 * fc_queue_work - Queue work to the fc_host workqueue. 2766 * @shost: Pointer to Scsi_Host bound to fc_host. 2767 * @work: Work to queue for execution. 2768 * 2769 * Return value: 2770 * 1 - work queued for execution 2771 * 0 - work is already queued 2772 * -EINVAL - work queue doesn't exist 2773 */ 2774 static int 2775 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2776 { 2777 if (unlikely(!fc_host_work_q(shost))) { 2778 printk(KERN_ERR 2779 "ERROR: FC host '%s' attempted to queue work, " 2780 "when no workqueue created.\n", shost->hostt->name); 2781 dump_stack(); 2782 2783 return -EINVAL; 2784 } 2785 2786 return queue_work(fc_host_work_q(shost), work); 2787 } 2788 2789 /** 2790 * fc_flush_work - Flush a fc_host's workqueue. 2791 * @shost: Pointer to Scsi_Host bound to fc_host. 2792 */ 2793 static void 2794 fc_flush_work(struct Scsi_Host *shost) 2795 { 2796 if (!fc_host_work_q(shost)) { 2797 printk(KERN_ERR 2798 "ERROR: FC host '%s' attempted to flush work, " 2799 "when no workqueue created.\n", shost->hostt->name); 2800 dump_stack(); 2801 return; 2802 } 2803 2804 flush_workqueue(fc_host_work_q(shost)); 2805 } 2806 2807 /** 2808 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2809 * @shost: Pointer to Scsi_Host bound to fc_host. 2810 * @rport: rport associated with the devloss work 2811 * @work: Work to queue for execution. 2812 * @delay: jiffies to delay the work queuing 2813 * 2814 * Return value: 2815 * 1 on success / 0 already queued / < 0 for error 2816 */ 2817 static int 2818 fc_queue_devloss_work(struct Scsi_Host *shost, struct fc_rport *rport, 2819 struct delayed_work *work, unsigned long delay) 2820 { 2821 if (unlikely(!rport->devloss_work_q)) { 2822 printk(KERN_ERR 2823 "ERROR: FC host '%s' attempted to queue work, " 2824 "when no workqueue created.\n", shost->hostt->name); 2825 dump_stack(); 2826 2827 return -EINVAL; 2828 } 2829 2830 return queue_delayed_work(rport->devloss_work_q, work, delay); 2831 } 2832 2833 /** 2834 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2835 * @shost: Pointer to Scsi_Host bound to fc_host. 2836 * @rport: rport associated with the devloss work 2837 */ 2838 static void 2839 fc_flush_devloss(struct Scsi_Host *shost, struct fc_rport *rport) 2840 { 2841 if (unlikely(!rport->devloss_work_q)) { 2842 printk(KERN_ERR 2843 "ERROR: FC host '%s' attempted to flush work, " 2844 "when no workqueue created.\n", shost->hostt->name); 2845 dump_stack(); 2846 return; 2847 } 2848 2849 flush_workqueue(rport->devloss_work_q); 2850 } 2851 2852 2853 /** 2854 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2855 * @shost: Which &Scsi_Host 2856 * 2857 * This routine is expected to be called immediately preceding the 2858 * a driver's call to scsi_remove_host(). 2859 * 2860 * WARNING: A driver utilizing the fc_transport, which fails to call 2861 * this routine prior to scsi_remove_host(), will leave dangling 2862 * objects in /sys/class/fc_remote_ports. Access to any of these 2863 * objects can result in a system crash !!! 2864 * 2865 * Notes: 2866 * This routine assumes no locks are held on entry. 2867 */ 2868 void 2869 fc_remove_host(struct Scsi_Host *shost) 2870 { 2871 struct fc_vport *vport = NULL, *next_vport = NULL; 2872 struct fc_rport *rport = NULL, *next_rport = NULL; 2873 struct workqueue_struct *work_q; 2874 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2875 unsigned long flags; 2876 2877 spin_lock_irqsave(shost->host_lock, flags); 2878 2879 /* Remove any vports */ 2880 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2881 vport->flags |= FC_VPORT_DELETING; 2882 fc_queue_work(shost, &vport->vport_delete_work); 2883 } 2884 2885 /* Remove any remote ports */ 2886 list_for_each_entry_safe(rport, next_rport, 2887 &fc_host->rports, peers) { 2888 list_del(&rport->peers); 2889 rport->port_state = FC_PORTSTATE_DELETED; 2890 fc_queue_work(shost, &rport->rport_delete_work); 2891 } 2892 2893 list_for_each_entry_safe(rport, next_rport, 2894 &fc_host->rport_bindings, peers) { 2895 list_del(&rport->peers); 2896 rport->port_state = FC_PORTSTATE_DELETED; 2897 fc_queue_work(shost, &rport->rport_delete_work); 2898 } 2899 2900 spin_unlock_irqrestore(shost->host_lock, flags); 2901 2902 /* flush all scan work items */ 2903 scsi_flush_work(shost); 2904 2905 /* flush all stgt delete, and rport delete work items, then kill it */ 2906 if (fc_host->work_q) { 2907 work_q = fc_host->work_q; 2908 fc_host->work_q = NULL; 2909 destroy_workqueue(work_q); 2910 } 2911 } 2912 EXPORT_SYMBOL(fc_remove_host); 2913 2914 static void fc_terminate_rport_io(struct fc_rport *rport) 2915 { 2916 struct Scsi_Host *shost = rport_to_shost(rport); 2917 struct fc_internal *i = to_fc_internal(shost->transportt); 2918 2919 /* Involve the LLDD if possible to terminate all io on the rport. */ 2920 if (i->f->terminate_rport_io) 2921 i->f->terminate_rport_io(rport); 2922 2923 /* 2924 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2925 */ 2926 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2927 } 2928 2929 /** 2930 * fc_starget_delete - called to delete the scsi descendants of an rport 2931 * @work: remote port to be operated on. 2932 * 2933 * Deletes target and all sdevs. 2934 */ 2935 static void 2936 fc_starget_delete(struct work_struct *work) 2937 { 2938 struct fc_rport *rport = 2939 container_of(work, struct fc_rport, stgt_delete_work); 2940 2941 fc_terminate_rport_io(rport); 2942 scsi_remove_target(&rport->dev); 2943 } 2944 2945 2946 /** 2947 * fc_rport_final_delete - finish rport termination and delete it. 2948 * @work: remote port to be deleted. 2949 */ 2950 static void 2951 fc_rport_final_delete(struct work_struct *work) 2952 { 2953 struct fc_rport *rport = 2954 container_of(work, struct fc_rport, rport_delete_work); 2955 struct device *dev = &rport->dev; 2956 struct Scsi_Host *shost = rport_to_shost(rport); 2957 struct fc_internal *i = to_fc_internal(shost->transportt); 2958 struct workqueue_struct *work_q; 2959 unsigned long flags; 2960 int do_callback = 0; 2961 2962 fc_terminate_rport_io(rport); 2963 2964 /* 2965 * if a scan is pending, flush the SCSI Host work_q so that 2966 * that we can reclaim the rport scan work element. 2967 */ 2968 if (rport->flags & FC_RPORT_SCAN_PENDING) 2969 scsi_flush_work(shost); 2970 2971 /* 2972 * Cancel any outstanding timers. These should really exist 2973 * only when rmmod'ing the LLDD and we're asking for 2974 * immediate termination of the rports 2975 */ 2976 spin_lock_irqsave(shost->host_lock, flags); 2977 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2978 spin_unlock_irqrestore(shost->host_lock, flags); 2979 if (!cancel_delayed_work(&rport->fail_io_work)) 2980 fc_flush_devloss(shost, rport); 2981 if (!cancel_delayed_work(&rport->dev_loss_work)) 2982 fc_flush_devloss(shost, rport); 2983 cancel_work_sync(&rport->scan_work); 2984 spin_lock_irqsave(shost->host_lock, flags); 2985 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2986 } 2987 spin_unlock_irqrestore(shost->host_lock, flags); 2988 2989 /* Delete SCSI target and sdevs */ 2990 if (rport->scsi_target_id != -1) 2991 fc_starget_delete(&rport->stgt_delete_work); 2992 2993 /* 2994 * Notify the driver that the rport is now dead. The LLDD will 2995 * also guarantee that any communication to the rport is terminated 2996 * 2997 * Avoid this call if we already called it when we preserved the 2998 * rport for the binding. 2999 */ 3000 spin_lock_irqsave(shost->host_lock, flags); 3001 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 3002 (i->f->dev_loss_tmo_callbk)) { 3003 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3004 do_callback = 1; 3005 } 3006 spin_unlock_irqrestore(shost->host_lock, flags); 3007 3008 if (do_callback) 3009 i->f->dev_loss_tmo_callbk(rport); 3010 3011 fc_bsg_remove(rport->rqst_q); 3012 3013 if (rport->devloss_work_q) { 3014 work_q = rport->devloss_work_q; 3015 rport->devloss_work_q = NULL; 3016 destroy_workqueue(work_q); 3017 } 3018 3019 transport_remove_device(dev); 3020 device_del(dev); 3021 transport_destroy_device(dev); 3022 scsi_host_put(shost); /* for fc_host->rport list */ 3023 put_device(dev); /* for self-reference */ 3024 } 3025 3026 3027 /** 3028 * fc_remote_port_create - allocates and creates a remote FC port. 3029 * @shost: scsi host the remote port is connected to. 3030 * @channel: Channel on shost port connected to. 3031 * @ids: The world wide names, fc address, and FC4 port 3032 * roles for the remote port. 3033 * 3034 * Allocates and creates the remoter port structure, including the 3035 * class and sysfs creation. 3036 * 3037 * Notes: 3038 * This routine assumes no locks are held on entry. 3039 */ 3040 static struct fc_rport * 3041 fc_remote_port_create(struct Scsi_Host *shost, int channel, 3042 struct fc_rport_identifiers *ids) 3043 { 3044 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3045 struct fc_internal *fci = to_fc_internal(shost->transportt); 3046 struct fc_rport *rport; 3047 struct device *dev; 3048 unsigned long flags; 3049 int error; 3050 size_t size; 3051 3052 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 3053 rport = kzalloc(size, GFP_KERNEL); 3054 if (unlikely(!rport)) { 3055 printk(KERN_ERR "%s: allocation failure\n", __func__); 3056 return NULL; 3057 } 3058 3059 rport->maxframe_size = -1; 3060 rport->supported_classes = FC_COS_UNSPECIFIED; 3061 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 3062 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 3063 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 3064 rport->port_id = ids->port_id; 3065 rport->roles = ids->roles; 3066 rport->port_state = FC_PORTSTATE_ONLINE; 3067 if (fci->f->dd_fcrport_size) 3068 rport->dd_data = &rport[1]; 3069 rport->channel = channel; 3070 rport->fast_io_fail_tmo = -1; 3071 3072 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 3073 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 3074 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 3075 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 3076 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 3077 3078 spin_lock_irqsave(shost->host_lock, flags); 3079 3080 rport->number = fc_host->next_rport_number++; 3081 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) || 3082 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) 3083 rport->scsi_target_id = fc_host->next_target_id++; 3084 else 3085 rport->scsi_target_id = -1; 3086 list_add_tail(&rport->peers, &fc_host->rports); 3087 scsi_host_get(shost); /* for fc_host->rport list */ 3088 3089 spin_unlock_irqrestore(shost->host_lock, flags); 3090 3091 rport->devloss_work_q = alloc_workqueue("fc_dl_%d_%d", 0, 0, 3092 shost->host_no, rport->number); 3093 if (!rport->devloss_work_q) { 3094 printk(KERN_ERR "FC Remote Port alloc_workqueue failed\n"); 3095 /* 3096 * Note that we have not yet called device_initialize() / get_device() 3097 * Cannot reclaim incremented rport->number because we released host_lock 3098 */ 3099 spin_lock_irqsave(shost->host_lock, flags); 3100 list_del(&rport->peers); 3101 scsi_host_put(shost); /* for fc_host->rport list */ 3102 spin_unlock_irqrestore(shost->host_lock, flags); 3103 kfree(rport); 3104 return NULL; 3105 } 3106 3107 dev = &rport->dev; 3108 device_initialize(dev); /* takes self reference */ 3109 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 3110 dev->release = fc_rport_dev_release; 3111 dev_set_name(dev, "rport-%d:%d-%d", 3112 shost->host_no, channel, rport->number); 3113 transport_setup_device(dev); 3114 3115 error = device_add(dev); 3116 if (error) { 3117 printk(KERN_ERR "FC Remote Port device_add failed\n"); 3118 goto delete_rport; 3119 } 3120 transport_add_device(dev); 3121 transport_configure_device(dev); 3122 3123 fc_bsg_rportadd(shost, rport); 3124 /* ignore any bsg add error - we just can't do sgio */ 3125 3126 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 3127 /* initiate a scan of the target */ 3128 rport->flags |= FC_RPORT_SCAN_PENDING; 3129 scsi_queue_work(shost, &rport->scan_work); 3130 } 3131 3132 return rport; 3133 3134 delete_rport: 3135 transport_destroy_device(dev); 3136 spin_lock_irqsave(shost->host_lock, flags); 3137 list_del(&rport->peers); 3138 scsi_host_put(shost); /* for fc_host->rport list */ 3139 spin_unlock_irqrestore(shost->host_lock, flags); 3140 put_device(dev->parent); 3141 kfree(rport); 3142 return NULL; 3143 } 3144 3145 /** 3146 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 3147 * @shost: scsi host the remote port is connected to. 3148 * @channel: Channel on shost port connected to. 3149 * @ids: The world wide names, fc address, and FC4 port 3150 * roles for the remote port. 3151 * 3152 * The LLDD calls this routine to notify the transport of the existence 3153 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 3154 * of the port, it's FC address (port_id), and the FC4 roles that are 3155 * active for the port. 3156 * 3157 * For ports that are FCP targets (aka scsi targets), the FC transport 3158 * maintains consistent target id bindings on behalf of the LLDD. 3159 * A consistent target id binding is an assignment of a target id to 3160 * a remote port identifier, which persists while the scsi host is 3161 * attached. The remote port can disappear, then later reappear, and 3162 * it's target id assignment remains the same. This allows for shifts 3163 * in FC addressing (if binding by wwpn or wwnn) with no apparent 3164 * changes to the scsi subsystem which is based on scsi host number and 3165 * target id values. Bindings are only valid during the attachment of 3166 * the scsi host. If the host detaches, then later re-attaches, target 3167 * id bindings may change. 3168 * 3169 * This routine is responsible for returning a remote port structure. 3170 * The routine will search the list of remote ports it maintains 3171 * internally on behalf of consistent target id mappings. If found, the 3172 * remote port structure will be reused. Otherwise, a new remote port 3173 * structure will be allocated. 3174 * 3175 * Whenever a remote port is allocated, a new fc_remote_port class 3176 * device is created. 3177 * 3178 * Should not be called from interrupt context. 3179 * 3180 * Notes: 3181 * This routine assumes no locks are held on entry. 3182 */ 3183 struct fc_rport * 3184 fc_remote_port_add(struct Scsi_Host *shost, int channel, 3185 struct fc_rport_identifiers *ids) 3186 { 3187 struct fc_internal *fci = to_fc_internal(shost->transportt); 3188 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3189 struct fc_rport *rport; 3190 unsigned long flags; 3191 int match = 0; 3192 3193 /* ensure any stgt delete functions are done */ 3194 fc_flush_work(shost); 3195 3196 /* 3197 * Search the list of "active" rports, for an rport that has been 3198 * deleted, but we've held off the real delete while the target 3199 * is in a "blocked" state. 3200 */ 3201 spin_lock_irqsave(shost->host_lock, flags); 3202 3203 list_for_each_entry(rport, &fc_host->rports, peers) { 3204 3205 if ((rport->port_state == FC_PORTSTATE_BLOCKED || 3206 rport->port_state == FC_PORTSTATE_NOTPRESENT) && 3207 (rport->channel == channel)) { 3208 3209 switch (fc_host->tgtid_bind_type) { 3210 case FC_TGTID_BIND_BY_WWPN: 3211 case FC_TGTID_BIND_NONE: 3212 if (rport->port_name == ids->port_name) 3213 match = 1; 3214 break; 3215 case FC_TGTID_BIND_BY_WWNN: 3216 if (rport->node_name == ids->node_name) 3217 match = 1; 3218 break; 3219 case FC_TGTID_BIND_BY_ID: 3220 if (rport->port_id == ids->port_id) 3221 match = 1; 3222 break; 3223 } 3224 3225 if (match) { 3226 3227 memcpy(&rport->node_name, &ids->node_name, 3228 sizeof(rport->node_name)); 3229 memcpy(&rport->port_name, &ids->port_name, 3230 sizeof(rport->port_name)); 3231 rport->port_id = ids->port_id; 3232 3233 rport->port_state = FC_PORTSTATE_ONLINE; 3234 rport->roles = ids->roles; 3235 3236 spin_unlock_irqrestore(shost->host_lock, flags); 3237 3238 if (fci->f->dd_fcrport_size) 3239 memset(rport->dd_data, 0, 3240 fci->f->dd_fcrport_size); 3241 3242 /* 3243 * If we were not a target, cancel the 3244 * io terminate and rport timers, and 3245 * we're done. 3246 * 3247 * If we were a target, but our new role 3248 * doesn't indicate a target, leave the 3249 * timers running expecting the role to 3250 * change as the target fully logs in. If 3251 * it doesn't, the target will be torn down. 3252 * 3253 * If we were a target, and our role shows 3254 * we're still a target, cancel the timers 3255 * and kick off a scan. 3256 */ 3257 3258 /* was a target, not in roles */ 3259 if ((rport->scsi_target_id != -1) && 3260 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 3261 return rport; 3262 3263 /* 3264 * Stop the fail io and dev_loss timers. 3265 * If they flush, the port_state will 3266 * be checked and will NOOP the function. 3267 */ 3268 if (!cancel_delayed_work(&rport->fail_io_work)) 3269 fc_flush_devloss(shost, rport); 3270 if (!cancel_delayed_work(&rport->dev_loss_work)) 3271 fc_flush_devloss(shost, rport); 3272 3273 spin_lock_irqsave(shost->host_lock, flags); 3274 3275 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3276 FC_RPORT_DEVLOSS_PENDING | 3277 FC_RPORT_DEVLOSS_CALLBK_DONE); 3278 3279 spin_unlock_irqrestore(shost->host_lock, flags); 3280 3281 /* if target, initiate a scan */ 3282 if (rport->scsi_target_id != -1) { 3283 scsi_target_unblock(&rport->dev, 3284 SDEV_RUNNING); 3285 spin_lock_irqsave(shost->host_lock, 3286 flags); 3287 rport->flags |= FC_RPORT_SCAN_PENDING; 3288 scsi_queue_work(shost, 3289 &rport->scan_work); 3290 spin_unlock_irqrestore(shost->host_lock, 3291 flags); 3292 } 3293 3294 fc_bsg_goose_queue(rport); 3295 3296 return rport; 3297 } 3298 } 3299 } 3300 3301 /* 3302 * Search the bindings array 3303 * Note: if never a FCP target, you won't be on this list 3304 */ 3305 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 3306 3307 /* search for a matching consistent binding */ 3308 3309 list_for_each_entry(rport, &fc_host->rport_bindings, 3310 peers) { 3311 if (rport->channel != channel) 3312 continue; 3313 3314 switch (fc_host->tgtid_bind_type) { 3315 case FC_TGTID_BIND_BY_WWPN: 3316 if (rport->port_name == ids->port_name) 3317 match = 1; 3318 break; 3319 case FC_TGTID_BIND_BY_WWNN: 3320 if (rport->node_name == ids->node_name) 3321 match = 1; 3322 break; 3323 case FC_TGTID_BIND_BY_ID: 3324 if (rport->port_id == ids->port_id) 3325 match = 1; 3326 break; 3327 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3328 break; 3329 } 3330 3331 if (match) { 3332 list_move_tail(&rport->peers, &fc_host->rports); 3333 break; 3334 } 3335 } 3336 3337 if (match) { 3338 memcpy(&rport->node_name, &ids->node_name, 3339 sizeof(rport->node_name)); 3340 memcpy(&rport->port_name, &ids->port_name, 3341 sizeof(rport->port_name)); 3342 rport->port_id = ids->port_id; 3343 rport->port_state = FC_PORTSTATE_ONLINE; 3344 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3345 3346 if (fci->f->dd_fcrport_size) 3347 memset(rport->dd_data, 0, 3348 fci->f->dd_fcrport_size); 3349 spin_unlock_irqrestore(shost->host_lock, flags); 3350 3351 fc_remote_port_rolechg(rport, ids->roles); 3352 return rport; 3353 } 3354 } 3355 3356 spin_unlock_irqrestore(shost->host_lock, flags); 3357 3358 /* No consistent binding found - create new remote port entry */ 3359 rport = fc_remote_port_create(shost, channel, ids); 3360 3361 return rport; 3362 } 3363 EXPORT_SYMBOL(fc_remote_port_add); 3364 3365 3366 /** 3367 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 3368 * @rport: The remote port that no longer exists 3369 * 3370 * The LLDD calls this routine to notify the transport that a remote 3371 * port is no longer part of the topology. Note: Although a port 3372 * may no longer be part of the topology, it may persist in the remote 3373 * ports displayed by the fc_host. We do this under 2 conditions: 3374 * 3375 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 3376 * This allows the port to temporarily disappear, then reappear without 3377 * disrupting the SCSI device tree attached to it. During the "blocked" 3378 * period the port will still exist. 3379 * 3380 * 2) If the port was a scsi target and disappears for longer than we 3381 * expect, we'll delete the port and the tear down the SCSI device tree 3382 * attached to it. However, we want to semi-persist the target id assigned 3383 * to that port if it eventually does exist. The port structure will 3384 * remain (although with minimal information) so that the target id 3385 * bindings also remain. 3386 * 3387 * If the remote port is not an FCP Target, it will be fully torn down 3388 * and deallocated, including the fc_remote_port class device. 3389 * 3390 * If the remote port is an FCP Target, the port will be placed in a 3391 * temporary blocked state. From the LLDD's perspective, the rport no 3392 * longer exists. From the SCSI midlayer's perspective, the SCSI target 3393 * exists, but all sdevs on it are blocked from further I/O. The following 3394 * is then expected. 3395 * 3396 * If the remote port does not return (signaled by a LLDD call to 3397 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 3398 * scsi target is removed - killing all outstanding i/o and removing the 3399 * scsi devices attached to it. The port structure will be marked Not 3400 * Present and be partially cleared, leaving only enough information to 3401 * recognize the remote port relative to the scsi target id binding if 3402 * it later appears. The port will remain as long as there is a valid 3403 * binding (e.g. until the user changes the binding type or unloads the 3404 * scsi host with the binding). 3405 * 3406 * If the remote port returns within the dev_loss_tmo value (and matches 3407 * according to the target id binding type), the port structure will be 3408 * reused. If it is no longer a SCSI target, the target will be torn 3409 * down. If it continues to be a SCSI target, then the target will be 3410 * unblocked (allowing i/o to be resumed), and a scan will be activated 3411 * to ensure that all luns are detected. 3412 * 3413 * Called from normal process context only - cannot be called from interrupt. 3414 * 3415 * Notes: 3416 * This routine assumes no locks are held on entry. 3417 */ 3418 void 3419 fc_remote_port_delete(struct fc_rport *rport) 3420 { 3421 struct Scsi_Host *shost = rport_to_shost(rport); 3422 unsigned long timeout = rport->dev_loss_tmo; 3423 unsigned long flags; 3424 3425 /* 3426 * No need to flush the fc_host work_q's, as all adds are synchronous. 3427 * 3428 * We do need to reclaim the rport scan work element, so eventually 3429 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 3430 * there's still a scan pending. 3431 */ 3432 3433 spin_lock_irqsave(shost->host_lock, flags); 3434 3435 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3436 (rport->port_state != FC_PORTSTATE_MARGINAL)) { 3437 spin_unlock_irqrestore(shost->host_lock, flags); 3438 return; 3439 } 3440 3441 /* 3442 * In the past, we if this was not an FCP-Target, we would 3443 * unconditionally just jump to deleting the rport. 3444 * However, rports can be used as node containers by the LLDD, 3445 * and its not appropriate to just terminate the rport at the 3446 * first sign of a loss in connectivity. The LLDD may want to 3447 * send ELS traffic to re-validate the login. If the rport is 3448 * immediately deleted, it makes it inappropriate for a node 3449 * container. 3450 * So... we now unconditionally wait dev_loss_tmo before 3451 * destroying an rport. 3452 */ 3453 3454 rport->port_state = FC_PORTSTATE_BLOCKED; 3455 3456 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3457 3458 spin_unlock_irqrestore(shost->host_lock, flags); 3459 3460 scsi_block_targets(shost, &rport->dev); 3461 3462 /* see if we need to kill io faster than waiting for device loss */ 3463 if ((rport->fast_io_fail_tmo != -1) && 3464 (rport->fast_io_fail_tmo < timeout)) 3465 fc_queue_devloss_work(shost, rport, &rport->fail_io_work, 3466 rport->fast_io_fail_tmo * HZ); 3467 3468 /* cap the length the devices can be blocked until they are deleted */ 3469 fc_queue_devloss_work(shost, rport, &rport->dev_loss_work, 3470 timeout * HZ); 3471 } 3472 EXPORT_SYMBOL(fc_remote_port_delete); 3473 3474 /** 3475 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3476 * @rport: The remote port that changed. 3477 * @roles: New roles for this port. 3478 * 3479 * Description: The LLDD calls this routine to notify the transport that the 3480 * roles on a remote port may have changed. The largest effect of this is 3481 * if a port now becomes a FCP Target, it must be allocated a 3482 * scsi target id. If the port is no longer a FCP target, any 3483 * scsi target id value assigned to it will persist in case the 3484 * role changes back to include FCP Target. No changes in the scsi 3485 * midlayer will be invoked if the role changes (in the expectation 3486 * that the role will be resumed. If it doesn't normal error processing 3487 * will take place). 3488 * 3489 * Should not be called from interrupt context. 3490 * 3491 * Notes: 3492 * This routine assumes no locks are held on entry. 3493 */ 3494 void 3495 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3496 { 3497 struct Scsi_Host *shost = rport_to_shost(rport); 3498 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3499 unsigned long flags; 3500 int create = 0; 3501 3502 spin_lock_irqsave(shost->host_lock, flags); 3503 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3504 if (rport->scsi_target_id == -1) { 3505 rport->scsi_target_id = fc_host->next_target_id++; 3506 create = 1; 3507 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3508 create = 1; 3509 } 3510 3511 rport->roles = roles; 3512 3513 spin_unlock_irqrestore(shost->host_lock, flags); 3514 3515 if (create) { 3516 /* 3517 * There may have been a delete timer running on the 3518 * port. Ensure that it is cancelled as we now know 3519 * the port is an FCP Target. 3520 * Note: we know the rport exists and is in an online 3521 * state as the LLDD would not have had an rport 3522 * reference to pass us. 3523 * 3524 * Take no action on the timer_delete() failure as the state 3525 * machine state change will validate the 3526 * transaction. 3527 */ 3528 if (!cancel_delayed_work(&rport->fail_io_work)) 3529 fc_flush_devloss(shost, rport); 3530 if (!cancel_delayed_work(&rport->dev_loss_work)) 3531 fc_flush_devloss(shost, rport); 3532 3533 spin_lock_irqsave(shost->host_lock, flags); 3534 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3535 FC_RPORT_DEVLOSS_PENDING | 3536 FC_RPORT_DEVLOSS_CALLBK_DONE); 3537 spin_unlock_irqrestore(shost->host_lock, flags); 3538 3539 /* ensure any stgt delete functions are done */ 3540 fc_flush_work(shost); 3541 3542 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3543 /* initiate a scan of the target */ 3544 spin_lock_irqsave(shost->host_lock, flags); 3545 rport->flags |= FC_RPORT_SCAN_PENDING; 3546 scsi_queue_work(shost, &rport->scan_work); 3547 spin_unlock_irqrestore(shost->host_lock, flags); 3548 } 3549 } 3550 EXPORT_SYMBOL(fc_remote_port_rolechg); 3551 3552 /** 3553 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3554 * @work: rport target that failed to reappear in the allotted time. 3555 * 3556 * Description: An attempt to delete a remote port blocks, and if it fails 3557 * to return in the allotted time this gets called. 3558 */ 3559 static void 3560 fc_timeout_deleted_rport(struct work_struct *work) 3561 { 3562 struct fc_rport *rport = 3563 container_of(work, struct fc_rport, dev_loss_work.work); 3564 struct Scsi_Host *shost = rport_to_shost(rport); 3565 struct fc_internal *i = to_fc_internal(shost->transportt); 3566 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3567 unsigned long flags; 3568 int do_callback = 0; 3569 3570 spin_lock_irqsave(shost->host_lock, flags); 3571 3572 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3573 3574 /* 3575 * If the port is ONLINE, then it came back. If it was a SCSI 3576 * target, validate it still is. If not, tear down the 3577 * scsi_target on it. 3578 */ 3579 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3580 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3581 (rport->scsi_target_id != -1) && 3582 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3583 dev_printk(KERN_ERR, &rport->dev, 3584 "blocked FC remote port time out: no longer" 3585 " a FCP target, removing starget\n"); 3586 spin_unlock_irqrestore(shost->host_lock, flags); 3587 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3588 fc_queue_work(shost, &rport->stgt_delete_work); 3589 return; 3590 } 3591 3592 /* NOOP state - we're flushing workq's */ 3593 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3594 spin_unlock_irqrestore(shost->host_lock, flags); 3595 dev_printk(KERN_ERR, &rport->dev, 3596 "blocked FC remote port time out: leaving" 3597 " rport%s alone\n", 3598 (rport->scsi_target_id != -1) ? " and starget" : ""); 3599 return; 3600 } 3601 3602 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3603 (rport->scsi_target_id == -1)) { 3604 list_del(&rport->peers); 3605 rport->port_state = FC_PORTSTATE_DELETED; 3606 dev_printk(KERN_ERR, &rport->dev, 3607 "blocked FC remote port time out: removing" 3608 " rport%s\n", 3609 (rport->scsi_target_id != -1) ? " and starget" : ""); 3610 fc_queue_work(shost, &rport->rport_delete_work); 3611 spin_unlock_irqrestore(shost->host_lock, flags); 3612 return; 3613 } 3614 3615 dev_printk(KERN_ERR, &rport->dev, 3616 "blocked FC remote port time out: removing target and " 3617 "saving binding\n"); 3618 3619 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3620 3621 /* 3622 * Note: We do not remove or clear the hostdata area. This allows 3623 * host-specific target data to persist along with the 3624 * scsi_target_id. It's up to the host to manage it's hostdata area. 3625 */ 3626 3627 /* 3628 * Reinitialize port attributes that may change if the port comes back. 3629 */ 3630 rport->maxframe_size = -1; 3631 rport->supported_classes = FC_COS_UNSPECIFIED; 3632 rport->roles = FC_PORT_ROLE_UNKNOWN; 3633 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3634 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3635 3636 /* 3637 * Pre-emptively kill I/O rather than waiting for the work queue 3638 * item to teardown the starget. (FCOE libFC folks prefer this 3639 * and to have the rport_port_id still set when it's done). 3640 */ 3641 spin_unlock_irqrestore(shost->host_lock, flags); 3642 fc_terminate_rport_io(rport); 3643 3644 spin_lock_irqsave(shost->host_lock, flags); 3645 3646 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3647 3648 /* remove the identifiers that aren't used in the consisting binding */ 3649 switch (fc_host->tgtid_bind_type) { 3650 case FC_TGTID_BIND_BY_WWPN: 3651 rport->node_name = -1; 3652 rport->port_id = -1; 3653 break; 3654 case FC_TGTID_BIND_BY_WWNN: 3655 rport->port_name = -1; 3656 rport->port_id = -1; 3657 break; 3658 case FC_TGTID_BIND_BY_ID: 3659 rport->node_name = -1; 3660 rport->port_name = -1; 3661 break; 3662 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3663 break; 3664 } 3665 3666 /* 3667 * As this only occurs if the remote port (scsi target) 3668 * went away and didn't come back - we'll remove 3669 * all attached scsi devices. 3670 */ 3671 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3672 fc_queue_work(shost, &rport->stgt_delete_work); 3673 3674 do_callback = 1; 3675 } 3676 3677 spin_unlock_irqrestore(shost->host_lock, flags); 3678 3679 /* 3680 * Notify the driver that the rport is now dead. The LLDD will 3681 * also guarantee that any communication to the rport is terminated 3682 * 3683 * Note: we set the CALLBK_DONE flag above to correspond 3684 */ 3685 if (do_callback && i->f->dev_loss_tmo_callbk) 3686 i->f->dev_loss_tmo_callbk(rport); 3687 } 3688 3689 3690 /** 3691 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3692 * @work: rport to terminate io on. 3693 * 3694 * Notes: Only requests the failure of the io, not that all are flushed 3695 * prior to returning. 3696 */ 3697 static void 3698 fc_timeout_fail_rport_io(struct work_struct *work) 3699 { 3700 struct fc_rport *rport = 3701 container_of(work, struct fc_rport, fail_io_work.work); 3702 3703 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3704 return; 3705 3706 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3707 fc_terminate_rport_io(rport); 3708 } 3709 3710 /** 3711 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3712 * @work: remote port to be scanned. 3713 */ 3714 static void 3715 fc_scsi_scan_rport(struct work_struct *work) 3716 { 3717 struct fc_rport *rport = 3718 container_of(work, struct fc_rport, scan_work); 3719 struct Scsi_Host *shost = rport_to_shost(rport); 3720 struct fc_internal *i = to_fc_internal(shost->transportt); 3721 unsigned long flags; 3722 3723 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3724 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3725 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3726 !(i->f->disable_target_scan)) { 3727 scsi_scan_target(&rport->dev, rport->channel, 3728 rport->scsi_target_id, SCAN_WILD_CARD, 3729 SCSI_SCAN_RESCAN); 3730 } 3731 3732 spin_lock_irqsave(shost->host_lock, flags); 3733 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3734 spin_unlock_irqrestore(shost->host_lock, flags); 3735 } 3736 3737 /** 3738 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport. 3739 * @rport: Remote port that scsi_eh is trying to recover. 3740 * 3741 * This routine can be called from a FC LLD scsi_eh callback. It 3742 * blocks the scsi_eh thread until the fc_rport leaves the 3743 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3744 * necessary to avoid the scsi_eh failing recovery actions for blocked 3745 * rports which would lead to offlined SCSI devices. 3746 * 3747 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3748 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3749 * passed back to scsi_eh. 3750 */ 3751 int fc_block_rport(struct fc_rport *rport) 3752 { 3753 struct Scsi_Host *shost = rport_to_shost(rport); 3754 unsigned long flags; 3755 3756 spin_lock_irqsave(shost->host_lock, flags); 3757 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3758 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3759 spin_unlock_irqrestore(shost->host_lock, flags); 3760 msleep(1000); 3761 spin_lock_irqsave(shost->host_lock, flags); 3762 } 3763 spin_unlock_irqrestore(shost->host_lock, flags); 3764 3765 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3766 return FAST_IO_FAIL; 3767 3768 return 0; 3769 } 3770 EXPORT_SYMBOL(fc_block_rport); 3771 3772 /** 3773 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3774 * @cmnd: SCSI command that scsi_eh is trying to recover 3775 * 3776 * This routine can be called from a FC LLD scsi_eh callback. It 3777 * blocks the scsi_eh thread until the fc_rport leaves the 3778 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3779 * necessary to avoid the scsi_eh failing recovery actions for blocked 3780 * rports which would lead to offlined SCSI devices. 3781 * 3782 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3783 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3784 * passed back to scsi_eh. 3785 */ 3786 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3787 { 3788 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3789 3790 if (WARN_ON_ONCE(!rport)) 3791 return FAST_IO_FAIL; 3792 3793 return fc_block_rport(rport); 3794 } 3795 EXPORT_SYMBOL(fc_block_scsi_eh); 3796 3797 /* 3798 * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not 3799 * @scmd: The SCSI command to be checked 3800 * 3801 * This checks the rport state to decide if a cmd is 3802 * retryable. 3803 * 3804 * Returns: true if the rport state is not in marginal state. 3805 */ 3806 bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd) 3807 { 3808 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 3809 3810 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3811 (scsi_cmd_to_rq(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT)) { 3812 set_host_byte(scmd, DID_TRANSPORT_MARGINAL); 3813 return false; 3814 } 3815 return true; 3816 } 3817 EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd); 3818 3819 /** 3820 * fc_vport_setup - allocates and creates a FC virtual port. 3821 * @shost: scsi host the virtual port is connected to. 3822 * @channel: Channel on shost port connected to. 3823 * @pdev: parent device for vport 3824 * @ids: The world wide names, FC4 port roles, etc for 3825 * the virtual port. 3826 * @ret_vport: The pointer to the created vport. 3827 * 3828 * Allocates and creates the vport structure, calls the parent host 3829 * to instantiate the vport, this completes w/ class and sysfs creation. 3830 * 3831 * Notes: 3832 * This routine assumes no locks are held on entry. 3833 */ 3834 static int 3835 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3836 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3837 { 3838 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3839 struct fc_internal *fci = to_fc_internal(shost->transportt); 3840 struct fc_vport *vport; 3841 struct device *dev; 3842 unsigned long flags; 3843 size_t size; 3844 int error; 3845 3846 *ret_vport = NULL; 3847 3848 if ( ! fci->f->vport_create) 3849 return -ENOENT; 3850 3851 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3852 vport = kzalloc(size, GFP_KERNEL); 3853 if (unlikely(!vport)) { 3854 printk(KERN_ERR "%s: allocation failure\n", __func__); 3855 return -ENOMEM; 3856 } 3857 3858 vport->vport_state = FC_VPORT_UNKNOWN; 3859 vport->vport_last_state = FC_VPORT_UNKNOWN; 3860 vport->node_name = ids->node_name; 3861 vport->port_name = ids->port_name; 3862 vport->roles = ids->roles; 3863 vport->vport_type = ids->vport_type; 3864 if (fci->f->dd_fcvport_size) 3865 vport->dd_data = &vport[1]; 3866 vport->shost = shost; 3867 vport->channel = channel; 3868 vport->flags = FC_VPORT_CREATING; 3869 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3870 3871 spin_lock_irqsave(shost->host_lock, flags); 3872 3873 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3874 spin_unlock_irqrestore(shost->host_lock, flags); 3875 kfree(vport); 3876 return -ENOSPC; 3877 } 3878 fc_host->npiv_vports_inuse++; 3879 vport->number = fc_host->next_vport_number++; 3880 list_add_tail(&vport->peers, &fc_host->vports); 3881 scsi_host_get(shost); /* for fc_host->vport list */ 3882 3883 spin_unlock_irqrestore(shost->host_lock, flags); 3884 3885 dev = &vport->dev; 3886 device_initialize(dev); /* takes self reference */ 3887 dev->parent = get_device(pdev); /* takes parent reference */ 3888 dev->release = fc_vport_dev_release; 3889 dev_set_name(dev, "vport-%d:%d-%d", 3890 shost->host_no, channel, vport->number); 3891 transport_setup_device(dev); 3892 3893 error = device_add(dev); 3894 if (error) { 3895 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3896 goto delete_vport; 3897 } 3898 transport_add_device(dev); 3899 transport_configure_device(dev); 3900 3901 error = fci->f->vport_create(vport, ids->disable); 3902 if (error) { 3903 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3904 goto delete_vport_all; 3905 } 3906 3907 /* 3908 * if the parent isn't the physical adapter's Scsi_Host, ensure 3909 * the Scsi_Host at least contains a symlink to the vport. 3910 */ 3911 if (pdev != &shost->shost_gendev) { 3912 error = sysfs_create_link(&shost->shost_gendev.kobj, 3913 &dev->kobj, dev_name(dev)); 3914 if (error) 3915 printk(KERN_ERR 3916 "%s: Cannot create vport symlinks for " 3917 "%s, err=%d\n", 3918 __func__, dev_name(dev), error); 3919 } 3920 spin_lock_irqsave(shost->host_lock, flags); 3921 vport->flags &= ~FC_VPORT_CREATING; 3922 spin_unlock_irqrestore(shost->host_lock, flags); 3923 3924 dev_printk(KERN_NOTICE, pdev, 3925 "%s created via shost%d channel %d\n", dev_name(dev), 3926 shost->host_no, channel); 3927 3928 *ret_vport = vport; 3929 3930 return 0; 3931 3932 delete_vport_all: 3933 transport_remove_device(dev); 3934 device_del(dev); 3935 delete_vport: 3936 transport_destroy_device(dev); 3937 spin_lock_irqsave(shost->host_lock, flags); 3938 list_del(&vport->peers); 3939 scsi_host_put(shost); /* for fc_host->vport list */ 3940 fc_host->npiv_vports_inuse--; 3941 spin_unlock_irqrestore(shost->host_lock, flags); 3942 put_device(dev->parent); 3943 kfree(vport); 3944 3945 return error; 3946 } 3947 3948 /** 3949 * fc_vport_create - Admin App or LLDD requests creation of a vport 3950 * @shost: scsi host the virtual port is connected to. 3951 * @channel: channel on shost port connected to. 3952 * @ids: The world wide names, FC4 port roles, etc for 3953 * the virtual port. 3954 * 3955 * Notes: 3956 * This routine assumes no locks are held on entry. 3957 */ 3958 struct fc_vport * 3959 fc_vport_create(struct Scsi_Host *shost, int channel, 3960 struct fc_vport_identifiers *ids) 3961 { 3962 int stat; 3963 struct fc_vport *vport; 3964 3965 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3966 ids, &vport); 3967 return stat ? NULL : vport; 3968 } 3969 EXPORT_SYMBOL(fc_vport_create); 3970 3971 /** 3972 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3973 * @vport: fc_vport to be terminated 3974 * 3975 * Calls the LLDD vport_delete() function, then deallocates and removes 3976 * the vport from the shost and object tree. 3977 * 3978 * Notes: 3979 * This routine assumes no locks are held on entry. 3980 */ 3981 int 3982 fc_vport_terminate(struct fc_vport *vport) 3983 { 3984 struct Scsi_Host *shost = vport_to_shost(vport); 3985 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3986 struct fc_internal *i = to_fc_internal(shost->transportt); 3987 struct device *dev = &vport->dev; 3988 unsigned long flags; 3989 int stat; 3990 3991 if (i->f->vport_delete) 3992 stat = i->f->vport_delete(vport); 3993 else 3994 stat = -ENOENT; 3995 3996 spin_lock_irqsave(shost->host_lock, flags); 3997 vport->flags &= ~FC_VPORT_DELETING; 3998 if (!stat) { 3999 vport->flags |= FC_VPORT_DELETED; 4000 list_del(&vport->peers); 4001 fc_host->npiv_vports_inuse--; 4002 scsi_host_put(shost); /* for fc_host->vport list */ 4003 } 4004 spin_unlock_irqrestore(shost->host_lock, flags); 4005 4006 if (stat) 4007 return stat; 4008 4009 if (dev->parent != &shost->shost_gendev) 4010 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 4011 transport_remove_device(dev); 4012 device_del(dev); 4013 transport_destroy_device(dev); 4014 4015 /* 4016 * Removing our self-reference should mean our 4017 * release function gets called, which will drop the remaining 4018 * parent reference and free the data structure. 4019 */ 4020 put_device(dev); /* for self-reference */ 4021 4022 return 0; /* SUCCESS */ 4023 } 4024 EXPORT_SYMBOL(fc_vport_terminate); 4025 4026 /** 4027 * fc_vport_sched_delete - workq-based delete request for a vport 4028 * @work: vport to be deleted. 4029 */ 4030 static void 4031 fc_vport_sched_delete(struct work_struct *work) 4032 { 4033 struct fc_vport *vport = 4034 container_of(work, struct fc_vport, vport_delete_work); 4035 int stat; 4036 4037 stat = fc_vport_terminate(vport); 4038 if (stat) 4039 dev_printk(KERN_ERR, vport->dev.parent, 4040 "%s: %s could not be deleted created via " 4041 "shost%d channel %d - error %d\n", __func__, 4042 dev_name(&vport->dev), vport->shost->host_no, 4043 vport->channel, stat); 4044 } 4045 4046 4047 /* 4048 * BSG support 4049 */ 4050 4051 /** 4052 * fc_bsg_job_timeout - handler for when a bsg request timesout 4053 * @req: request that timed out 4054 */ 4055 static enum blk_eh_timer_return 4056 fc_bsg_job_timeout(struct request *req) 4057 { 4058 struct bsg_job *job = blk_mq_rq_to_pdu(req); 4059 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4060 struct fc_rport *rport = fc_bsg_to_rport(job); 4061 struct fc_internal *i = to_fc_internal(shost->transportt); 4062 int err = 0, inflight = 0; 4063 4064 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) 4065 return BLK_EH_RESET_TIMER; 4066 4067 inflight = bsg_job_get(job); 4068 4069 if (inflight && i->f->bsg_timeout) { 4070 /* call LLDD to abort the i/o as it has timed out */ 4071 err = i->f->bsg_timeout(job); 4072 if (err == -EAGAIN) { 4073 bsg_job_put(job); 4074 return BLK_EH_RESET_TIMER; 4075 } else if (err) 4076 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 4077 "abort failed with status %d\n", err); 4078 } 4079 4080 /* the blk_end_sync_io() doesn't check the error */ 4081 if (inflight) 4082 blk_mq_end_request(req, BLK_STS_IOERR); 4083 return BLK_EH_DONE; 4084 } 4085 4086 /** 4087 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 4088 * @shost: scsi host rport attached to 4089 * @job: bsg job to be processed 4090 */ 4091 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4092 { 4093 struct fc_internal *i = to_fc_internal(shost->transportt); 4094 struct fc_bsg_request *bsg_request = job->request; 4095 struct fc_bsg_reply *bsg_reply = job->reply; 4096 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4097 int ret; 4098 4099 /* check if we really have all the request data needed */ 4100 if (job->request_len < cmdlen) { 4101 ret = -ENOMSG; 4102 goto fail_host_msg; 4103 } 4104 4105 /* Validate the host command */ 4106 switch (bsg_request->msgcode) { 4107 case FC_BSG_HST_ADD_RPORT: 4108 cmdlen += sizeof(struct fc_bsg_host_add_rport); 4109 break; 4110 4111 case FC_BSG_HST_DEL_RPORT: 4112 cmdlen += sizeof(struct fc_bsg_host_del_rport); 4113 break; 4114 4115 case FC_BSG_HST_ELS_NOLOGIN: 4116 cmdlen += sizeof(struct fc_bsg_host_els); 4117 /* there better be a xmt and rcv payloads */ 4118 if ((!job->request_payload.payload_len) || 4119 (!job->reply_payload.payload_len)) { 4120 ret = -EINVAL; 4121 goto fail_host_msg; 4122 } 4123 break; 4124 4125 case FC_BSG_HST_CT: 4126 cmdlen += sizeof(struct fc_bsg_host_ct); 4127 /* there better be xmt and rcv payloads */ 4128 if ((!job->request_payload.payload_len) || 4129 (!job->reply_payload.payload_len)) { 4130 ret = -EINVAL; 4131 goto fail_host_msg; 4132 } 4133 break; 4134 4135 case FC_BSG_HST_VENDOR: 4136 cmdlen += sizeof(struct fc_bsg_host_vendor); 4137 if ((shost->hostt->vendor_id == 0L) || 4138 (bsg_request->rqst_data.h_vendor.vendor_id != 4139 shost->hostt->vendor_id)) { 4140 ret = -ESRCH; 4141 goto fail_host_msg; 4142 } 4143 break; 4144 4145 default: 4146 ret = -EBADR; 4147 goto fail_host_msg; 4148 } 4149 4150 ret = i->f->bsg_request(job); 4151 if (!ret) 4152 return 0; 4153 4154 fail_host_msg: 4155 /* return the errno failure code as the only status */ 4156 BUG_ON(job->reply_len < sizeof(uint32_t)); 4157 bsg_reply->reply_payload_rcv_len = 0; 4158 bsg_reply->result = ret; 4159 job->reply_len = sizeof(uint32_t); 4160 bsg_job_done(job, bsg_reply->result, 4161 bsg_reply->reply_payload_rcv_len); 4162 return 0; 4163 } 4164 4165 4166 /* 4167 * fc_bsg_goose_queue - restart rport queue in case it was stopped 4168 * @rport: rport to be restarted 4169 */ 4170 static void 4171 fc_bsg_goose_queue(struct fc_rport *rport) 4172 { 4173 struct request_queue *q = rport->rqst_q; 4174 4175 if (q) 4176 blk_mq_run_hw_queues(q, true); 4177 } 4178 4179 /** 4180 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 4181 * @shost: scsi host rport attached to 4182 * @job: bsg job to be processed 4183 */ 4184 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4185 { 4186 struct fc_internal *i = to_fc_internal(shost->transportt); 4187 struct fc_bsg_request *bsg_request = job->request; 4188 struct fc_bsg_reply *bsg_reply = job->reply; 4189 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4190 int ret; 4191 4192 /* check if we really have all the request data needed */ 4193 if (job->request_len < cmdlen) { 4194 ret = -ENOMSG; 4195 goto fail_rport_msg; 4196 } 4197 4198 /* Validate the rport command */ 4199 switch (bsg_request->msgcode) { 4200 case FC_BSG_RPT_ELS: 4201 cmdlen += sizeof(struct fc_bsg_rport_els); 4202 goto check_bidi; 4203 4204 case FC_BSG_RPT_CT: 4205 cmdlen += sizeof(struct fc_bsg_rport_ct); 4206 check_bidi: 4207 /* there better be xmt and rcv payloads */ 4208 if ((!job->request_payload.payload_len) || 4209 (!job->reply_payload.payload_len)) { 4210 ret = -EINVAL; 4211 goto fail_rport_msg; 4212 } 4213 break; 4214 default: 4215 ret = -EBADR; 4216 goto fail_rport_msg; 4217 } 4218 4219 ret = i->f->bsg_request(job); 4220 if (!ret) 4221 return 0; 4222 4223 fail_rport_msg: 4224 /* return the errno failure code as the only status */ 4225 BUG_ON(job->reply_len < sizeof(uint32_t)); 4226 bsg_reply->reply_payload_rcv_len = 0; 4227 bsg_reply->result = ret; 4228 job->reply_len = sizeof(uint32_t); 4229 bsg_job_done(job, bsg_reply->result, 4230 bsg_reply->reply_payload_rcv_len); 4231 return 0; 4232 } 4233 4234 static int fc_bsg_dispatch(struct bsg_job *job) 4235 { 4236 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4237 4238 if (scsi_is_fc_rport(job->dev)) 4239 return fc_bsg_rport_dispatch(shost, job); 4240 else 4241 return fc_bsg_host_dispatch(shost, job); 4242 } 4243 4244 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport) 4245 { 4246 if (rport->port_state == FC_PORTSTATE_BLOCKED && 4247 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 4248 return BLK_STS_RESOURCE; 4249 4250 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 4251 (rport->port_state != FC_PORTSTATE_MARGINAL)) 4252 return BLK_STS_IOERR; 4253 4254 return BLK_STS_OK; 4255 } 4256 4257 4258 static int fc_bsg_dispatch_prep(struct bsg_job *job) 4259 { 4260 struct fc_rport *rport = fc_bsg_to_rport(job); 4261 blk_status_t ret; 4262 4263 ret = fc_bsg_rport_prep(rport); 4264 switch (ret) { 4265 case BLK_STS_OK: 4266 break; 4267 case BLK_STS_RESOURCE: 4268 return -EAGAIN; 4269 default: 4270 return -EIO; 4271 } 4272 4273 return fc_bsg_dispatch(job); 4274 } 4275 4276 /** 4277 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4278 * @shost: shost for fc_host 4279 * @fc_host: fc_host adding the structures to 4280 */ 4281 static int 4282 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4283 { 4284 struct device *dev = &shost->shost_gendev; 4285 struct fc_internal *i = to_fc_internal(shost->transportt); 4286 struct queue_limits lim; 4287 struct request_queue *q; 4288 char bsg_name[20]; 4289 4290 fc_host->rqst_q = NULL; 4291 4292 if (!i->f->bsg_request) 4293 return -ENOTSUPP; 4294 4295 snprintf(bsg_name, sizeof(bsg_name), 4296 "fc_host%d", shost->host_no); 4297 scsi_init_limits(shost, &lim); 4298 lim.max_segments = min_not_zero(lim.max_segments, i->f->max_bsg_segments); 4299 q = bsg_setup_queue(dev, bsg_name, &lim, fc_bsg_dispatch, 4300 fc_bsg_job_timeout, i->f->dd_bsg_size); 4301 if (IS_ERR(q)) { 4302 dev_err(dev, 4303 "fc_host%d: bsg interface failed to initialize - setup queue\n", 4304 shost->host_no); 4305 return PTR_ERR(q); 4306 } 4307 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4308 fc_host->rqst_q = q; 4309 return 0; 4310 } 4311 4312 /** 4313 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4314 * @shost: shost that rport is attached to 4315 * @rport: rport that the bsg hooks are being attached to 4316 */ 4317 static int 4318 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4319 { 4320 struct device *dev = &rport->dev; 4321 struct fc_internal *i = to_fc_internal(shost->transportt); 4322 struct queue_limits lim; 4323 struct request_queue *q; 4324 4325 rport->rqst_q = NULL; 4326 4327 if (!i->f->bsg_request) 4328 return -ENOTSUPP; 4329 4330 scsi_init_limits(shost, &lim); 4331 lim.max_segments = min_not_zero(lim.max_segments, i->f->max_bsg_segments); 4332 q = bsg_setup_queue(dev, dev_name(dev), &lim, fc_bsg_dispatch_prep, 4333 fc_bsg_job_timeout, i->f->dd_bsg_size); 4334 if (IS_ERR(q)) { 4335 dev_err(dev, "failed to setup bsg queue\n"); 4336 return PTR_ERR(q); 4337 } 4338 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4339 rport->rqst_q = q; 4340 return 0; 4341 } 4342 4343 4344 /** 4345 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4346 * @q: the request_queue that is to be torn down. 4347 * 4348 * Notes: 4349 * Before unregistering the queue empty any requests that are blocked 4350 * 4351 * 4352 */ 4353 static void 4354 fc_bsg_remove(struct request_queue *q) 4355 { 4356 bsg_remove_queue(q); 4357 } 4358 4359 4360 /* Original Author: Martin Hicks */ 4361 MODULE_AUTHOR("James Smart"); 4362 MODULE_DESCRIPTION("FC Transport Attributes"); 4363 MODULE_LICENSE("GPL"); 4364 4365 module_init(fc_transport_init); 4366 module_exit(fc_transport_exit); 4367