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