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