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