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/hex.h> 16 #include <linux/kernel.h> 17 #include <linux/bsg-lib.h> 18 #include <scsi/scsi_device.h> 19 #include <scsi/scsi_host.h> 20 #include <scsi/scsi_transport.h> 21 #include <scsi/scsi_transport_fc.h> 22 #include <scsi/scsi_cmnd.h> 23 #include <net/netlink.h> 24 #include <scsi/scsi_netlink_fc.h> 25 #include <scsi/scsi_bsg_fc.h> 26 #include <uapi/scsi/fc/fc_els.h> 27 #include "scsi_priv.h" 28 29 static int fc_queue_work(struct Scsi_Host *, struct work_struct *); 30 static void fc_vport_sched_delete(struct work_struct *work); 31 static int fc_vport_setup(struct Scsi_Host *shost, int channel, 32 struct device *pdev, struct fc_vport_identifiers *ids, 33 struct fc_vport **vport); 34 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); 35 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); 36 static void fc_bsg_remove(struct request_queue *); 37 static void fc_bsg_goose_queue(struct fc_rport *); 38 static void fc_li_stats_update(u16 event_type, 39 struct fc_fpin_stats *stats); 40 static void fc_delivery_stats_update(u32 reason_code, 41 struct fc_fpin_stats *stats); 42 static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats); 43 44 /* 45 * Module Parameters 46 */ 47 48 /* 49 * dev_loss_tmo: the default number of seconds that the FC transport 50 * should insulate the loss of a remote port. 51 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 52 */ 53 static unsigned int fc_dev_loss_tmo = 60; /* seconds */ 54 55 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); 56 MODULE_PARM_DESC(dev_loss_tmo, 57 "Maximum number of seconds that the FC transport should" 58 " insulate the loss of a remote port. Once this value is" 59 " exceeded, the scsi target is removed. Value should be" 60 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" 61 " fast_io_fail_tmo is not set."); 62 63 /* 64 * Redefine so that we can have same named attributes in the 65 * sdev/starget/host objects. 66 */ 67 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 68 struct device_attribute device_attr_##_prefix##_##_name = \ 69 __ATTR(_name,_mode,_show,_store) 70 71 #define fc_enum_name_search(title, table_type, table) \ 72 static const char *get_fc_##title##_name(enum table_type table_key) \ 73 { \ 74 int i; \ 75 char *name = NULL; \ 76 \ 77 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 78 if (table[i].value == table_key) { \ 79 name = table[i].name; \ 80 break; \ 81 } \ 82 } \ 83 return name; \ 84 } 85 86 #define fc_enum_name_match(title, table_type, table) \ 87 static int get_fc_##title##_match(const char *table_key, \ 88 enum table_type *value) \ 89 { \ 90 int i; \ 91 \ 92 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 93 if (strncmp(table_key, table[i].name, \ 94 table[i].matchlen) == 0) { \ 95 *value = table[i].value; \ 96 return 0; /* success */ \ 97 } \ 98 } \ 99 return 1; /* failure */ \ 100 } 101 102 103 /* Convert fc_port_type values to ascii string name */ 104 static struct { 105 enum fc_port_type value; 106 char *name; 107 } fc_port_type_names[] = { 108 { FC_PORTTYPE_UNKNOWN, "Unknown" }, 109 { FC_PORTTYPE_OTHER, "Other" }, 110 { FC_PORTTYPE_NOTPRESENT, "Not Present" }, 111 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, 112 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, 113 { FC_PORTTYPE_LPORT, "LPort (private loop)" }, 114 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, 115 { FC_PORTTYPE_NPIV, "NPIV VPORT" }, 116 }; 117 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) 118 #define FC_PORTTYPE_MAX_NAMELEN 50 119 120 /* Reuse fc_port_type enum function for vport_type */ 121 #define get_fc_vport_type_name get_fc_port_type_name 122 123 124 /* Convert fc_host_event_code values to ascii string name */ 125 static const struct { 126 enum fc_host_event_code value; 127 char *name; 128 } fc_host_event_code_names[] = { 129 { FCH_EVT_LIP, "lip" }, 130 { FCH_EVT_LINKUP, "link_up" }, 131 { FCH_EVT_LINKDOWN, "link_down" }, 132 { FCH_EVT_LIPRESET, "lip_reset" }, 133 { FCH_EVT_RSCN, "rscn" }, 134 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, 135 { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, 136 { FCH_EVT_PORT_ONLINE, "port_online" }, 137 { FCH_EVT_PORT_OFFLINE, "port_offline" }, 138 { FCH_EVT_PORT_FABRIC, "port_fabric" }, 139 { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, 140 { FCH_EVT_LINK_FPIN, "link_FPIN" }, 141 { FCH_EVT_LINK_FPIN_ACK, "link_FPIN_ACK" }, 142 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 143 }; 144 fc_enum_name_search(host_event_code, fc_host_event_code, 145 fc_host_event_code_names) 146 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 147 148 149 /* Convert fc_port_state values to ascii string name */ 150 static struct { 151 enum fc_port_state value; 152 char *name; 153 int matchlen; 154 } fc_port_state_names[] = { 155 { FC_PORTSTATE_UNKNOWN, "Unknown", 7}, 156 { FC_PORTSTATE_NOTPRESENT, "Not Present", 11 }, 157 { FC_PORTSTATE_ONLINE, "Online", 6 }, 158 { FC_PORTSTATE_OFFLINE, "Offline", 7 }, 159 { FC_PORTSTATE_BLOCKED, "Blocked", 7 }, 160 { FC_PORTSTATE_BYPASSED, "Bypassed", 8 }, 161 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics", 11 }, 162 { FC_PORTSTATE_LINKDOWN, "Linkdown", 8 }, 163 { FC_PORTSTATE_ERROR, "Error", 5 }, 164 { FC_PORTSTATE_LOOPBACK, "Loopback", 8 }, 165 { FC_PORTSTATE_DELETED, "Deleted", 7 }, 166 { FC_PORTSTATE_MARGINAL, "Marginal", 8 }, 167 }; 168 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 169 fc_enum_name_match(port_state, fc_port_state, fc_port_state_names) 170 #define FC_PORTSTATE_MAX_NAMELEN 20 171 172 173 /* Convert fc_vport_state values to ascii string name */ 174 static struct { 175 enum fc_vport_state value; 176 char *name; 177 } fc_vport_state_names[] = { 178 { FC_VPORT_UNKNOWN, "Unknown" }, 179 { FC_VPORT_ACTIVE, "Active" }, 180 { FC_VPORT_DISABLED, "Disabled" }, 181 { FC_VPORT_LINKDOWN, "Linkdown" }, 182 { FC_VPORT_INITIALIZING, "Initializing" }, 183 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 184 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 185 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 186 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 187 { FC_VPORT_FAILED, "VPort Failed" }, 188 }; 189 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 190 #define FC_VPORTSTATE_MAX_NAMELEN 24 191 192 /* Reuse fc_vport_state enum function for vport_last_state */ 193 #define get_fc_vport_last_state_name get_fc_vport_state_name 194 195 196 /* Convert fc_tgtid_binding_type values to ascii string name */ 197 static const struct { 198 enum fc_tgtid_binding_type value; 199 char *name; 200 int matchlen; 201 } fc_tgtid_binding_type_names[] = { 202 { FC_TGTID_BIND_NONE, "none", 4 }, 203 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 204 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 205 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 206 }; 207 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 208 fc_tgtid_binding_type_names) 209 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 210 fc_tgtid_binding_type_names) 211 #define FC_BINDTYPE_MAX_NAMELEN 30 212 213 214 #define fc_bitfield_name_search(title, table) \ 215 static ssize_t \ 216 get_fc_##title##_names(u32 table_key, char *buf) \ 217 { \ 218 char *prefix = ""; \ 219 ssize_t len = 0; \ 220 int i; \ 221 \ 222 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 223 if (table[i].value & table_key) { \ 224 len += sprintf(buf + len, "%s%s", \ 225 prefix, table[i].name); \ 226 prefix = ", "; \ 227 } \ 228 } \ 229 len += sprintf(buf + len, "\n"); \ 230 return len; \ 231 } 232 233 234 /* Convert FC_COS bit values to ascii string name */ 235 static const struct { 236 u32 value; 237 char *name; 238 } fc_cos_names[] = { 239 { FC_COS_CLASS1, "Class 1" }, 240 { FC_COS_CLASS2, "Class 2" }, 241 { FC_COS_CLASS3, "Class 3" }, 242 { FC_COS_CLASS4, "Class 4" }, 243 { FC_COS_CLASS6, "Class 6" }, 244 }; 245 fc_bitfield_name_search(cos, fc_cos_names) 246 247 248 /* Convert FC_PORTSPEED bit values to ascii string name */ 249 static const struct { 250 u32 value; 251 char *name; 252 } fc_port_speed_names[] = { 253 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 254 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 255 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 256 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 257 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 258 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 259 { FC_PORTSPEED_32GBIT, "32 Gbit" }, 260 { FC_PORTSPEED_20GBIT, "20 Gbit" }, 261 { FC_PORTSPEED_40GBIT, "40 Gbit" }, 262 { FC_PORTSPEED_50GBIT, "50 Gbit" }, 263 { FC_PORTSPEED_100GBIT, "100 Gbit" }, 264 { FC_PORTSPEED_25GBIT, "25 Gbit" }, 265 { FC_PORTSPEED_64GBIT, "64 Gbit" }, 266 { FC_PORTSPEED_128GBIT, "128 Gbit" }, 267 { FC_PORTSPEED_256GBIT, "256 Gbit" }, 268 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 269 }; 270 fc_bitfield_name_search(port_speed, fc_port_speed_names) 271 272 273 static int 274 show_fc_fc4s (char *buf, u8 *fc4_list) 275 { 276 int i, len=0; 277 278 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 279 len += sprintf(buf + len , "0x%02x ", *fc4_list); 280 len += sprintf(buf + len, "\n"); 281 return len; 282 } 283 284 285 /* Convert FC_PORT_ROLE bit values to ascii string name */ 286 static const struct { 287 u32 value; 288 char *name; 289 } fc_port_role_names[] = { 290 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 291 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 292 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 293 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" }, 294 { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" }, 295 { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" }, 296 { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" }, 297 }; 298 fc_bitfield_name_search(port_roles, fc_port_role_names) 299 300 /* 301 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 302 */ 303 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 304 #define FC_WELLKNOWN_ROLE_MASK 0x00000f 305 #define FC_FPORT_PORTID 0x00000e 306 #define FC_FABCTLR_PORTID 0x00000d 307 #define FC_DIRSRVR_PORTID 0x00000c 308 #define FC_TIMESRVR_PORTID 0x00000b 309 #define FC_MGMTSRVR_PORTID 0x00000a 310 311 312 static void fc_timeout_deleted_rport(struct work_struct *work); 313 static void fc_timeout_fail_rport_io(struct work_struct *work); 314 static void fc_scsi_scan_rport(struct work_struct *work); 315 316 /* 317 * Attribute counts pre object type... 318 * Increase these values if you add attributes 319 */ 320 #define FC_STARGET_NUM_ATTRS 3 321 #define FC_RPORT_NUM_ATTRS 10 322 #define FC_VPORT_NUM_ATTRS 9 323 #define FC_HOST_NUM_ATTRS 29 324 325 struct fc_internal { 326 struct scsi_transport_template t; 327 struct fc_function_template *f; 328 329 /* 330 * For attributes : each object has : 331 * An array of the actual attributes structures 332 * An array of null-terminated pointers to the attribute 333 * structures - used for mid-layer interaction. 334 * 335 * The attribute containers for the starget and host are are 336 * part of the midlayer. As the remote port is specific to the 337 * fc transport, we must provide the attribute container. 338 */ 339 struct device_attribute private_starget_attrs[ 340 FC_STARGET_NUM_ATTRS]; 341 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 342 343 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 344 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 345 346 struct transport_container rport_attr_cont; 347 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 348 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 349 350 struct transport_container vport_attr_cont; 351 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 352 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 353 }; 354 355 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 356 357 static int fc_target_setup(struct transport_container *tc, struct device *dev, 358 struct device *cdev) 359 { 360 struct scsi_target *starget = to_scsi_target(dev); 361 struct fc_rport *rport = starget_to_rport(starget); 362 363 /* 364 * if parent is remote port, use values from remote port. 365 * Otherwise, this host uses the fc_transport, but not the 366 * remote port interface. As such, initialize to known non-values. 367 */ 368 if (rport) { 369 fc_starget_node_name(starget) = rport->node_name; 370 fc_starget_port_name(starget) = rport->port_name; 371 fc_starget_port_id(starget) = rport->port_id; 372 } else { 373 fc_starget_node_name(starget) = -1; 374 fc_starget_port_name(starget) = -1; 375 fc_starget_port_id(starget) = -1; 376 } 377 378 return 0; 379 } 380 381 static DECLARE_TRANSPORT_CLASS(fc_transport_class, 382 "fc_transport", 383 fc_target_setup, 384 NULL, 385 NULL); 386 387 static int fc_host_setup(struct transport_container *tc, struct device *dev, 388 struct device *cdev) 389 { 390 struct Scsi_Host *shost = dev_to_shost(dev); 391 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 392 393 /* 394 * Set default values easily detected by the midlayer as 395 * failure cases. The scsi lldd is responsible for initializing 396 * all transport attributes to valid values per host. 397 */ 398 fc_host->node_name = -1; 399 fc_host->port_name = -1; 400 fc_host->permanent_port_name = -1; 401 fc_host->supported_classes = FC_COS_UNSPECIFIED; 402 memset(fc_host->supported_fc4s, 0, 403 sizeof(fc_host->supported_fc4s)); 404 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 405 fc_host->maxframe_size = -1; 406 fc_host->max_npiv_vports = 0; 407 memset(fc_host->serial_number, 0, 408 sizeof(fc_host->serial_number)); 409 memset(fc_host->manufacturer, 0, 410 sizeof(fc_host->manufacturer)); 411 memset(fc_host->model, 0, 412 sizeof(fc_host->model)); 413 memset(fc_host->model_description, 0, 414 sizeof(fc_host->model_description)); 415 memset(fc_host->hardware_version, 0, 416 sizeof(fc_host->hardware_version)); 417 memset(fc_host->driver_version, 0, 418 sizeof(fc_host->driver_version)); 419 memset(fc_host->firmware_version, 0, 420 sizeof(fc_host->firmware_version)); 421 memset(fc_host->optionrom_version, 0, 422 sizeof(fc_host->optionrom_version)); 423 424 fc_host->port_id = -1; 425 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 426 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 427 memset(fc_host->active_fc4s, 0, 428 sizeof(fc_host->active_fc4s)); 429 fc_host->speed = FC_PORTSPEED_UNKNOWN; 430 fc_host->fabric_name = -1; 431 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 432 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 433 memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats)); 434 435 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 436 437 INIT_LIST_HEAD(&fc_host->rports); 438 INIT_LIST_HEAD(&fc_host->rport_bindings); 439 INIT_LIST_HEAD(&fc_host->vports); 440 fc_host->next_rport_number = 0; 441 fc_host->next_target_id = 0; 442 fc_host->next_vport_number = 0; 443 fc_host->npiv_vports_inuse = 0; 444 445 fc_host->work_q = alloc_workqueue("fc_wq_%d", WQ_PERCPU, 0, 446 shost->host_no); 447 if (!fc_host->work_q) 448 return -ENOMEM; 449 450 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 451 452 fc_bsg_hostadd(shost, fc_host); 453 /* ignore any bsg add error - we just can't do sgio */ 454 455 return 0; 456 } 457 458 static int fc_host_remove(struct transport_container *tc, struct device *dev, 459 struct device *cdev) 460 { 461 struct Scsi_Host *shost = dev_to_shost(dev); 462 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 463 464 fc_bsg_remove(fc_host->rqst_q); 465 return 0; 466 } 467 468 static DECLARE_TRANSPORT_CLASS(fc_host_class, 469 "fc_host", 470 fc_host_setup, 471 fc_host_remove, 472 NULL); 473 474 /* 475 * Setup and Remove actions for remote ports are handled 476 * in the service functions below. 477 */ 478 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 479 "fc_remote_ports", 480 NULL, 481 NULL, 482 NULL); 483 484 /* 485 * Setup and Remove actions for virtual ports are handled 486 * in the service functions below. 487 */ 488 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 489 "fc_vports", 490 NULL, 491 NULL, 492 NULL); 493 494 /* 495 * Netlink Infrastructure 496 */ 497 498 static atomic_t fc_event_seq; 499 500 /** 501 * fc_get_event_number - Obtain the next sequential FC event number 502 * 503 * Notes: 504 * We could have inlined this, but it would have required fc_event_seq to 505 * be exposed. For now, live with the subroutine call. 506 * Atomic used to avoid lock/unlock... 507 */ 508 u32 509 fc_get_event_number(void) 510 { 511 return atomic_add_return(1, &fc_event_seq); 512 } 513 EXPORT_SYMBOL(fc_get_event_number); 514 515 /** 516 * fc_host_post_fc_event - routine to do the work of posting an event 517 * on an fc_host. 518 * @shost: host the event occurred on 519 * @event_number: fc event number obtained from get_fc_event_number() 520 * @event_code: fc_host event being posted 521 * @data_len: amount, in bytes, of event data 522 * @data_buf: pointer to event data 523 * @vendor_id: value for Vendor id 524 * 525 * Notes: 526 * This routine assumes no locks are held on entry. 527 */ 528 void 529 fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number, 530 enum fc_host_event_code event_code, 531 u32 data_len, char *data_buf, u64 vendor_id) 532 { 533 struct sk_buff *skb; 534 struct nlmsghdr *nlh; 535 struct fc_nl_event *event; 536 const char *name; 537 size_t len, padding; 538 int err; 539 540 if (!data_buf || data_len < 4) 541 data_len = 0; 542 543 if (!scsi_nl_sock) { 544 err = -ENOENT; 545 goto send_fail; 546 } 547 548 len = FC_NL_MSGALIGN(sizeof(*event) - sizeof(event->event_data) + data_len); 549 550 skb = nlmsg_new(len, GFP_KERNEL); 551 if (!skb) { 552 err = -ENOBUFS; 553 goto send_fail; 554 } 555 556 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 557 if (!nlh) { 558 err = -ENOBUFS; 559 goto send_fail_skb; 560 } 561 event = nlmsg_data(nlh); 562 563 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 564 FC_NL_ASYNC_EVENT, len); 565 event->seconds = ktime_get_real_seconds(); 566 event->vendor_id = vendor_id; 567 event->host_no = shost->host_no; 568 event->event_datalen = data_len; /* bytes */ 569 event->event_num = event_number; 570 event->event_code = event_code; 571 if (data_len) 572 memcpy(event->event_data_flex, data_buf, data_len); 573 padding = len - offsetof(typeof(*event), event_data_flex) - data_len; 574 memset(event->event_data_flex + data_len, 0, padding); 575 576 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 577 GFP_KERNEL); 578 return; 579 580 send_fail_skb: 581 kfree_skb(skb); 582 send_fail: 583 name = get_fc_host_event_code_name(event_code); 584 printk(KERN_WARNING 585 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 586 __func__, shost->host_no, 587 (name) ? name : "<unknown>", 588 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err); 589 return; 590 } 591 EXPORT_SYMBOL(fc_host_post_fc_event); 592 593 /** 594 * fc_host_post_event - called to post an even on an fc_host. 595 * @shost: host the event occurred on 596 * @event_number: fc event number obtained from get_fc_event_number() 597 * @event_code: fc_host event being posted 598 * @event_data: 32bits of data for the event being posted 599 * 600 * Notes: 601 * This routine assumes no locks are held on entry. 602 */ 603 void 604 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 605 enum fc_host_event_code event_code, u32 event_data) 606 { 607 fc_host_post_fc_event(shost, event_number, event_code, 608 (u32)sizeof(u32), (char *)&event_data, 0); 609 } 610 EXPORT_SYMBOL(fc_host_post_event); 611 612 613 /** 614 * fc_host_post_vendor_event - called to post a vendor unique event 615 * on an fc_host 616 * @shost: host the event occurred on 617 * @event_number: fc event number obtained from get_fc_event_number() 618 * @data_len: amount, in bytes, of vendor unique data 619 * @data_buf: pointer to vendor unique data 620 * @vendor_id: Vendor id 621 * 622 * Notes: 623 * This routine assumes no locks are held on entry. 624 */ 625 void 626 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 627 u32 data_len, char * data_buf, u64 vendor_id) 628 { 629 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE, 630 data_len, data_buf, vendor_id); 631 } 632 EXPORT_SYMBOL(fc_host_post_vendor_event); 633 634 /** 635 * fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn 636 * @shost: host the fc_rport is associated with 637 * @wwpn: wwpn of the fc_rport device 638 * 639 * Notes: 640 * This routine assumes no locks are held on entry. 641 */ 642 struct fc_rport * 643 fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn) 644 { 645 struct fc_rport *rport; 646 unsigned long flags; 647 648 spin_lock_irqsave(shost->host_lock, flags); 649 650 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 651 if (rport->port_state != FC_PORTSTATE_ONLINE) 652 continue; 653 654 if (rport->port_name == wwpn) { 655 spin_unlock_irqrestore(shost->host_lock, flags); 656 return rport; 657 } 658 } 659 660 spin_unlock_irqrestore(shost->host_lock, flags); 661 return NULL; 662 } 663 EXPORT_SYMBOL(fc_find_rport_by_wwpn); 664 665 static void 666 fc_li_stats_update(u16 event_type, 667 struct fc_fpin_stats *stats) 668 { 669 stats->li++; 670 switch (event_type) { 671 case FPIN_LI_UNKNOWN: 672 stats->li_failure_unknown++; 673 break; 674 case FPIN_LI_LINK_FAILURE: 675 stats->li_link_failure_count++; 676 break; 677 case FPIN_LI_LOSS_OF_SYNC: 678 stats->li_loss_of_sync_count++; 679 break; 680 case FPIN_LI_LOSS_OF_SIG: 681 stats->li_loss_of_signals_count++; 682 break; 683 case FPIN_LI_PRIM_SEQ_ERR: 684 stats->li_prim_seq_err_count++; 685 break; 686 case FPIN_LI_INVALID_TX_WD: 687 stats->li_invalid_tx_word_count++; 688 break; 689 case FPIN_LI_INVALID_CRC: 690 stats->li_invalid_crc_count++; 691 break; 692 case FPIN_LI_DEVICE_SPEC: 693 stats->li_device_specific++; 694 break; 695 } 696 } 697 698 static void 699 fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats) 700 { 701 stats->dn++; 702 switch (reason_code) { 703 case FPIN_DELI_UNKNOWN: 704 stats->dn_unknown++; 705 break; 706 case FPIN_DELI_TIMEOUT: 707 stats->dn_timeout++; 708 break; 709 case FPIN_DELI_UNABLE_TO_ROUTE: 710 stats->dn_unable_to_route++; 711 break; 712 case FPIN_DELI_DEVICE_SPEC: 713 stats->dn_device_specific++; 714 break; 715 } 716 } 717 718 static void 719 fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats) 720 { 721 stats->cn++; 722 switch (event_type) { 723 case FPIN_CONGN_CLEAR: 724 stats->cn_clear++; 725 break; 726 case FPIN_CONGN_LOST_CREDIT: 727 stats->cn_lost_credit++; 728 break; 729 case FPIN_CONGN_CREDIT_STALL: 730 stats->cn_credit_stall++; 731 break; 732 case FPIN_CONGN_OVERSUBSCRIPTION: 733 stats->cn_oversubscription++; 734 break; 735 case FPIN_CONGN_DEVICE_SPEC: 736 stats->cn_device_specific++; 737 } 738 } 739 740 static void 741 fc_fpin_pname_stats_update(struct Scsi_Host *shost, 742 struct fc_rport *attach_rport, u16 event_type, 743 u32 desc_len, u32 fixed_len, u32 pname_count, 744 __be64 *pname_list, 745 void (*stats_update)(u16 event_type, 746 struct fc_fpin_stats *stats)) 747 { 748 u32 i; 749 struct fc_rport *rport; 750 u64 wwpn; 751 752 if (desc_len < fixed_len) 753 pname_count = 0; 754 else 755 pname_count = min(pname_count, (desc_len - fixed_len) / 756 sizeof(pname_list[0])); 757 758 for (i = 0; i < pname_count; i++) { 759 wwpn = be64_to_cpu(pname_list[i]); 760 rport = fc_find_rport_by_wwpn(shost, wwpn); 761 if (rport && 762 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 763 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 764 if (rport == attach_rport) 765 continue; 766 stats_update(event_type, &rport->fpin_stats); 767 } 768 } 769 } 770 771 /* 772 * fc_fpin_li_stats_update - routine to update Link Integrity 773 * event statistics. 774 * @shost: host the FPIN was received on 775 * @tlv: pointer to link integrity descriptor 776 * 777 */ 778 static void 779 fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv) 780 { 781 struct fc_rport *rport = NULL; 782 struct fc_rport *attach_rport = NULL; 783 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 784 struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv; 785 u16 event_type = be16_to_cpu(li_desc->event_type); 786 787 rport = fc_find_rport_by_wwpn(shost, 788 be64_to_cpu(li_desc->attached_wwpn)); 789 if (rport && 790 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 791 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 792 attach_rport = rport; 793 fc_li_stats_update(event_type, &attach_rport->fpin_stats); 794 } 795 796 fc_fpin_pname_stats_update(shost, attach_rport, event_type, 797 be32_to_cpu(li_desc->desc_len), 798 FC_TLV_DESC_LENGTH_FROM_SZ(*li_desc), 799 be32_to_cpu(li_desc->pname_count), 800 li_desc->pname_list, fc_li_stats_update); 801 802 if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn)) 803 fc_li_stats_update(event_type, &fc_host->fpin_stats); 804 } 805 806 /* 807 * fc_fpin_delivery_stats_update - routine to update Delivery Notification 808 * event statistics. 809 * @shost: host the FPIN was received on 810 * @tlv: pointer to delivery descriptor 811 * 812 */ 813 static void 814 fc_fpin_delivery_stats_update(struct Scsi_Host *shost, 815 struct fc_tlv_desc *tlv) 816 { 817 struct fc_rport *rport = NULL; 818 struct fc_rport *attach_rport = NULL; 819 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 820 struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv; 821 u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code); 822 823 rport = fc_find_rport_by_wwpn(shost, 824 be64_to_cpu(dn_desc->attached_wwpn)); 825 if (rport && 826 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 827 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 828 attach_rport = rport; 829 fc_delivery_stats_update(reason_code, 830 &attach_rport->fpin_stats); 831 } 832 833 if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn)) 834 fc_delivery_stats_update(reason_code, &fc_host->fpin_stats); 835 } 836 837 /* 838 * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion 839 * event statistics. 840 * @shost: host the FPIN was received on 841 * @tlv: pointer to peer congestion descriptor 842 * 843 */ 844 static void 845 fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost, 846 struct fc_tlv_desc *tlv) 847 { 848 struct fc_rport *rport = NULL; 849 struct fc_rport *attach_rport = NULL; 850 struct fc_fn_peer_congn_desc *pc_desc = 851 (struct fc_fn_peer_congn_desc *)tlv; 852 u16 event_type = be16_to_cpu(pc_desc->event_type); 853 854 rport = fc_find_rport_by_wwpn(shost, 855 be64_to_cpu(pc_desc->attached_wwpn)); 856 if (rport && 857 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 858 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 859 attach_rport = rport; 860 fc_cn_stats_update(event_type, &attach_rport->fpin_stats); 861 } 862 863 fc_fpin_pname_stats_update(shost, attach_rport, event_type, 864 be32_to_cpu(pc_desc->desc_len), 865 FC_TLV_DESC_LENGTH_FROM_SZ(*pc_desc), 866 be32_to_cpu(pc_desc->pname_count), 867 pc_desc->pname_list, fc_cn_stats_update); 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 if (port_state != rport->port_state) 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 if (port_state != rport->port_state) 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_encryption(name) \ 1338 static ssize_t fc_rport_encinfo_##name(struct device *cd, \ 1339 struct device_attribute *attr, \ 1340 char *buf) \ 1341 { \ 1342 struct fc_rport *rport = transport_class_to_rport(cd); \ 1343 struct Scsi_Host *shost = rport_to_shost(rport); \ 1344 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1345 struct fc_encryption_info *info; \ 1346 ssize_t ret = -ENOENT; \ 1347 u32 data; \ 1348 \ 1349 if (i->f->get_fc_rport_enc_info) { \ 1350 info = (i->f->get_fc_rport_enc_info)(rport); \ 1351 if (info) { \ 1352 data = info->name; \ 1353 if (!strcmp(#name, "status")) { \ 1354 ret = scnprintf(buf, \ 1355 FC_RPORT_ENCRYPTION_STATUS_MAX_LEN, \ 1356 "%s\n", \ 1357 data ? "Encrypted" : "Unencrypted"); \ 1358 } \ 1359 } \ 1360 } \ 1361 return ret; \ 1362 } \ 1363 static FC_DEVICE_ATTR(rport, encryption_##name, 0444, fc_rport_encinfo_##name, NULL) \ 1364 1365 fc_rport_encryption(status); 1366 1367 static struct attribute *fc_rport_encryption_attrs[] = { 1368 &device_attr_rport_encryption_status.attr, 1369 NULL 1370 }; 1371 1372 static struct attribute_group fc_rport_encryption_group = { 1373 .name = "encryption", 1374 .attrs = fc_rport_encryption_attrs, 1375 }; 1376 1377 #define fc_rport_fpin_statistic(name) \ 1378 static ssize_t fc_rport_fpinstat_##name(struct device *cd, \ 1379 struct device_attribute *attr, \ 1380 char *buf) \ 1381 { \ 1382 struct fc_rport *rport = transport_class_to_rport(cd); \ 1383 \ 1384 return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \ 1385 } \ 1386 static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL) 1387 1388 fc_rport_fpin_statistic(dn); 1389 fc_rport_fpin_statistic(dn_unknown); 1390 fc_rport_fpin_statistic(dn_timeout); 1391 fc_rport_fpin_statistic(dn_unable_to_route); 1392 fc_rport_fpin_statistic(dn_device_specific); 1393 fc_rport_fpin_statistic(cn); 1394 fc_rport_fpin_statistic(cn_clear); 1395 fc_rport_fpin_statistic(cn_lost_credit); 1396 fc_rport_fpin_statistic(cn_credit_stall); 1397 fc_rport_fpin_statistic(cn_oversubscription); 1398 fc_rport_fpin_statistic(cn_device_specific); 1399 fc_rport_fpin_statistic(li); 1400 fc_rport_fpin_statistic(li_failure_unknown); 1401 fc_rport_fpin_statistic(li_link_failure_count); 1402 fc_rport_fpin_statistic(li_loss_of_sync_count); 1403 fc_rport_fpin_statistic(li_loss_of_signals_count); 1404 fc_rport_fpin_statistic(li_prim_seq_err_count); 1405 fc_rport_fpin_statistic(li_invalid_tx_word_count); 1406 fc_rport_fpin_statistic(li_invalid_crc_count); 1407 fc_rport_fpin_statistic(li_device_specific); 1408 1409 static struct attribute *fc_rport_statistics_attrs[] = { 1410 &device_attr_rport_fpin_dn.attr, 1411 &device_attr_rport_fpin_dn_unknown.attr, 1412 &device_attr_rport_fpin_dn_timeout.attr, 1413 &device_attr_rport_fpin_dn_unable_to_route.attr, 1414 &device_attr_rport_fpin_dn_device_specific.attr, 1415 &device_attr_rport_fpin_li.attr, 1416 &device_attr_rport_fpin_li_failure_unknown.attr, 1417 &device_attr_rport_fpin_li_link_failure_count.attr, 1418 &device_attr_rport_fpin_li_loss_of_sync_count.attr, 1419 &device_attr_rport_fpin_li_loss_of_signals_count.attr, 1420 &device_attr_rport_fpin_li_prim_seq_err_count.attr, 1421 &device_attr_rport_fpin_li_invalid_tx_word_count.attr, 1422 &device_attr_rport_fpin_li_invalid_crc_count.attr, 1423 &device_attr_rport_fpin_li_device_specific.attr, 1424 &device_attr_rport_fpin_cn.attr, 1425 &device_attr_rport_fpin_cn_clear.attr, 1426 &device_attr_rport_fpin_cn_lost_credit.attr, 1427 &device_attr_rport_fpin_cn_credit_stall.attr, 1428 &device_attr_rport_fpin_cn_oversubscription.attr, 1429 &device_attr_rport_fpin_cn_device_specific.attr, 1430 NULL 1431 }; 1432 1433 static struct attribute_group fc_rport_statistics_group = { 1434 .name = "statistics", 1435 .attrs = fc_rport_statistics_attrs, 1436 }; 1437 1438 1439 /* 1440 * FC SCSI Target Attribute Management 1441 */ 1442 1443 /* 1444 * Note: in the target show function we recognize when the remote 1445 * port is in the hierarchy and do not allow the driver to get 1446 * involved in sysfs functions. The driver only gets involved if 1447 * it's the "old" style that doesn't use rports. 1448 */ 1449 #define fc_starget_show_function(field, format_string, sz, cast) \ 1450 static ssize_t \ 1451 show_fc_starget_##field (struct device *dev, \ 1452 struct device_attribute *attr, char *buf) \ 1453 { \ 1454 struct scsi_target *starget = transport_class_to_starget(dev); \ 1455 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1456 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1457 struct fc_rport *rport = starget_to_rport(starget); \ 1458 if (rport) \ 1459 fc_starget_##field(starget) = rport->field; \ 1460 else if (i->f->get_starget_##field) \ 1461 i->f->get_starget_##field(starget); \ 1462 return snprintf(buf, sz, format_string, \ 1463 cast fc_starget_##field(starget)); \ 1464 } 1465 1466 #define fc_starget_rd_attr(field, format_string, sz) \ 1467 fc_starget_show_function(field, format_string, sz, ) \ 1468 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1469 show_fc_starget_##field, NULL) 1470 1471 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1472 fc_starget_show_function(field, format_string, sz, (cast)) \ 1473 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1474 show_fc_starget_##field, NULL) 1475 1476 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1477 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1478 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1479 i->private_starget_attrs[count].store = NULL; \ 1480 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1481 if (i->f->show_starget_##field) \ 1482 count++ 1483 1484 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1485 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1486 if (!i->f->set_starget_##field) { \ 1487 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1488 i->private_starget_attrs[count].store = NULL; \ 1489 } \ 1490 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1491 if (i->f->show_starget_##field) \ 1492 count++ 1493 1494 /* The FC Transport SCSI Target Attributes: */ 1495 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1496 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1497 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1498 1499 1500 /* 1501 * FC Virtual Port Attribute Management 1502 */ 1503 1504 #define fc_vport_show_function(field, format_string, sz, cast) \ 1505 static ssize_t \ 1506 show_fc_vport_##field (struct device *dev, \ 1507 struct device_attribute *attr, char *buf) \ 1508 { \ 1509 struct fc_vport *vport = transport_class_to_vport(dev); \ 1510 struct Scsi_Host *shost = vport_to_shost(vport); \ 1511 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1512 if ((i->f->get_vport_##field) && \ 1513 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1514 i->f->get_vport_##field(vport); \ 1515 return snprintf(buf, sz, format_string, cast vport->field); \ 1516 } 1517 1518 #define fc_vport_store_function(field) \ 1519 static ssize_t \ 1520 store_fc_vport_##field(struct device *dev, \ 1521 struct device_attribute *attr, \ 1522 const char *buf, size_t count) \ 1523 { \ 1524 int val; \ 1525 struct fc_vport *vport = transport_class_to_vport(dev); \ 1526 struct Scsi_Host *shost = vport_to_shost(vport); \ 1527 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1528 char *cp; \ 1529 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1530 return -EBUSY; \ 1531 val = simple_strtoul(buf, &cp, 0); \ 1532 if (*cp && (*cp != '\n')) \ 1533 return -EINVAL; \ 1534 i->f->set_vport_##field(vport, val); \ 1535 return count; \ 1536 } 1537 1538 #define fc_vport_store_str_function(field, slen) \ 1539 static ssize_t \ 1540 store_fc_vport_##field(struct device *dev, \ 1541 struct device_attribute *attr, \ 1542 const char *buf, size_t count) \ 1543 { \ 1544 struct fc_vport *vport = transport_class_to_vport(dev); \ 1545 struct Scsi_Host *shost = vport_to_shost(vport); \ 1546 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1547 unsigned int cnt=count; \ 1548 \ 1549 /* count may include a LF at end of string */ \ 1550 if (buf[cnt-1] == '\n') \ 1551 cnt--; \ 1552 if (cnt > ((slen) - 1)) \ 1553 return -EINVAL; \ 1554 memcpy(vport->field, buf, cnt); \ 1555 i->f->set_vport_##field(vport); \ 1556 return count; \ 1557 } 1558 1559 #define fc_vport_rd_attr(field, format_string, sz) \ 1560 fc_vport_show_function(field, format_string, sz, ) \ 1561 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1562 show_fc_vport_##field, NULL) 1563 1564 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1565 fc_vport_show_function(field, format_string, sz, (cast)) \ 1566 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1567 show_fc_vport_##field, NULL) 1568 1569 #define fc_vport_rw_attr(field, format_string, sz) \ 1570 fc_vport_show_function(field, format_string, sz, ) \ 1571 fc_vport_store_function(field) \ 1572 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1573 show_fc_vport_##field, \ 1574 store_fc_vport_##field) 1575 1576 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1577 static ssize_t \ 1578 show_fc_vport_##field (struct device *dev, \ 1579 struct device_attribute *attr, char *buf) \ 1580 { \ 1581 struct fc_vport *vport = transport_class_to_vport(dev); \ 1582 return snprintf(buf, sz, format_string, cast vport->field); \ 1583 } 1584 1585 #define fc_private_vport_store_u32_function(field) \ 1586 static ssize_t \ 1587 store_fc_vport_##field(struct device *dev, \ 1588 struct device_attribute *attr, \ 1589 const char *buf, size_t count) \ 1590 { \ 1591 u32 val; \ 1592 struct fc_vport *vport = transport_class_to_vport(dev); \ 1593 char *cp; \ 1594 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1595 return -EBUSY; \ 1596 val = simple_strtoul(buf, &cp, 0); \ 1597 if (*cp && (*cp != '\n')) \ 1598 return -EINVAL; \ 1599 vport->field = val; \ 1600 return count; \ 1601 } 1602 1603 1604 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1605 fc_private_vport_show_function(field, format_string, sz, ) \ 1606 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1607 show_fc_vport_##field, NULL) 1608 1609 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1610 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1611 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1612 show_fc_vport_##field, NULL) 1613 1614 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1615 fc_private_vport_show_function(field, format_string, sz, ) \ 1616 fc_private_vport_store_u32_function(field) \ 1617 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1618 show_fc_vport_##field, \ 1619 store_fc_vport_##field) 1620 1621 1622 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1623 static ssize_t \ 1624 show_fc_vport_##title (struct device *dev, \ 1625 struct device_attribute *attr, \ 1626 char *buf) \ 1627 { \ 1628 struct fc_vport *vport = transport_class_to_vport(dev); \ 1629 const char *name; \ 1630 name = get_fc_##title##_name(vport->title); \ 1631 if (!name) \ 1632 return -EINVAL; \ 1633 return snprintf(buf, maxlen, "%s\n", name); \ 1634 } \ 1635 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1636 show_fc_vport_##title, NULL) 1637 1638 1639 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1640 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1641 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1642 i->private_vport_attrs[count].store = NULL; \ 1643 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1644 if (i->f->get_##field) \ 1645 count++ 1646 /* NOTE: Above MACRO differs: checks function not show bit */ 1647 1648 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1649 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1650 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1651 i->private_vport_attrs[count].store = NULL; \ 1652 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1653 count++ 1654 1655 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1656 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1657 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1658 if (i->f->field) \ 1659 count++ 1660 /* NOTE: Above MACRO differs: checks function */ 1661 1662 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1663 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1664 if (!i->f->set_vport_##field) { \ 1665 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1666 i->private_vport_attrs[count].store = NULL; \ 1667 } \ 1668 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1669 count++ 1670 /* NOTE: Above MACRO differs: does not check show bit */ 1671 1672 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1673 { \ 1674 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1675 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1676 count++; \ 1677 } 1678 1679 1680 /* The FC Transport Virtual Port Attributes: */ 1681 1682 /* Fixed Virtual Port Attributes */ 1683 1684 /* Dynamic Virtual Port Attributes */ 1685 1686 /* Private Virtual Port Attributes */ 1687 1688 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1689 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1690 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1691 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1692 1693 static ssize_t 1694 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1695 char *buf) 1696 { 1697 struct fc_vport *vport = transport_class_to_vport(dev); 1698 1699 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1700 return snprintf(buf, 20, "unknown\n"); 1701 return get_fc_port_roles_names(vport->roles, buf); 1702 } 1703 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1704 1705 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1706 1707 fc_private_vport_show_function(symbolic_name, "%s\n", 1708 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1709 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1710 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1711 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1712 1713 static ssize_t 1714 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1715 const char *buf, size_t count) 1716 { 1717 struct fc_vport *vport = transport_class_to_vport(dev); 1718 struct Scsi_Host *shost = vport_to_shost(vport); 1719 unsigned long flags; 1720 1721 spin_lock_irqsave(shost->host_lock, flags); 1722 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1723 spin_unlock_irqrestore(shost->host_lock, flags); 1724 return -EBUSY; 1725 } 1726 vport->flags |= FC_VPORT_DELETING; 1727 spin_unlock_irqrestore(shost->host_lock, flags); 1728 1729 fc_queue_work(shost, &vport->vport_delete_work); 1730 return count; 1731 } 1732 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1733 NULL, store_fc_vport_delete); 1734 1735 1736 /* 1737 * Enable/Disable vport 1738 * Write "1" to disable, write "0" to enable 1739 */ 1740 static ssize_t 1741 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1742 const char *buf, 1743 size_t count) 1744 { 1745 struct fc_vport *vport = transport_class_to_vport(dev); 1746 struct Scsi_Host *shost = vport_to_shost(vport); 1747 struct fc_internal *i = to_fc_internal(shost->transportt); 1748 int stat; 1749 1750 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1751 return -EBUSY; 1752 1753 if (*buf == '0') { 1754 if (vport->vport_state != FC_VPORT_DISABLED) 1755 return -EALREADY; 1756 } else if (*buf == '1') { 1757 if (vport->vport_state == FC_VPORT_DISABLED) 1758 return -EALREADY; 1759 } else 1760 return -EINVAL; 1761 1762 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1763 return stat ? stat : count; 1764 } 1765 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1766 NULL, store_fc_vport_disable); 1767 1768 1769 /* 1770 * Host Attribute Management 1771 */ 1772 1773 #define fc_host_show_function(field, format_string, sz, cast) \ 1774 static ssize_t \ 1775 show_fc_host_##field (struct device *dev, \ 1776 struct device_attribute *attr, char *buf) \ 1777 { \ 1778 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1779 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1780 if (i->f->get_host_##field) \ 1781 i->f->get_host_##field(shost); \ 1782 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1783 } 1784 1785 #define fc_host_store_function(field) \ 1786 static ssize_t \ 1787 store_fc_host_##field(struct device *dev, \ 1788 struct device_attribute *attr, \ 1789 const char *buf, size_t count) \ 1790 { \ 1791 int val; \ 1792 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1793 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1794 char *cp; \ 1795 \ 1796 val = simple_strtoul(buf, &cp, 0); \ 1797 if (*cp && (*cp != '\n')) \ 1798 return -EINVAL; \ 1799 i->f->set_host_##field(shost, val); \ 1800 return count; \ 1801 } 1802 1803 #define fc_host_store_str_function(field, slen) \ 1804 static ssize_t \ 1805 store_fc_host_##field(struct device *dev, \ 1806 struct device_attribute *attr, \ 1807 const char *buf, size_t count) \ 1808 { \ 1809 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1810 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1811 unsigned int cnt=count; \ 1812 \ 1813 /* count may include a LF at end of string */ \ 1814 if (buf[cnt-1] == '\n') \ 1815 cnt--; \ 1816 if (cnt > ((slen) - 1)) \ 1817 return -EINVAL; \ 1818 memcpy(fc_host_##field(shost), buf, cnt); \ 1819 i->f->set_host_##field(shost); \ 1820 return count; \ 1821 } 1822 1823 #define fc_host_rd_attr(field, format_string, sz) \ 1824 fc_host_show_function(field, format_string, sz, ) \ 1825 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1826 show_fc_host_##field, NULL) 1827 1828 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1829 fc_host_show_function(field, format_string, sz, (cast)) \ 1830 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1831 show_fc_host_##field, NULL) 1832 1833 #define fc_host_rw_attr(field, format_string, sz) \ 1834 fc_host_show_function(field, format_string, sz, ) \ 1835 fc_host_store_function(field) \ 1836 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1837 show_fc_host_##field, \ 1838 store_fc_host_##field) 1839 1840 #define fc_host_rd_enum_attr(title, maxlen) \ 1841 static ssize_t \ 1842 show_fc_host_##title (struct device *dev, \ 1843 struct device_attribute *attr, char *buf) \ 1844 { \ 1845 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1846 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1847 const char *name; \ 1848 if (i->f->get_host_##title) \ 1849 i->f->get_host_##title(shost); \ 1850 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1851 if (!name) \ 1852 return -EINVAL; \ 1853 return snprintf(buf, maxlen, "%s\n", name); \ 1854 } \ 1855 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1856 1857 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1858 i->private_host_attrs[count] = device_attr_host_##field; \ 1859 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1860 i->private_host_attrs[count].store = NULL; \ 1861 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1862 if (i->f->show_host_##field) \ 1863 count++ 1864 1865 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1866 i->private_host_attrs[count] = device_attr_host_##field; \ 1867 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1868 i->private_host_attrs[count].store = NULL; \ 1869 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1870 count++ 1871 1872 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1873 i->private_host_attrs[count] = device_attr_host_##field; \ 1874 if (!i->f->set_host_##field) { \ 1875 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1876 i->private_host_attrs[count].store = NULL; \ 1877 } \ 1878 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1879 if (i->f->show_host_##field) \ 1880 count++ 1881 1882 1883 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1884 static ssize_t \ 1885 show_fc_host_##field (struct device *dev, \ 1886 struct device_attribute *attr, char *buf) \ 1887 { \ 1888 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1889 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1890 } 1891 1892 #define fc_private_host_rd_attr(field, format_string, sz) \ 1893 fc_private_host_show_function(field, format_string, sz, ) \ 1894 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1895 show_fc_host_##field, NULL) 1896 1897 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1898 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1899 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1900 show_fc_host_##field, NULL) 1901 1902 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1903 i->private_host_attrs[count] = device_attr_host_##field; \ 1904 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1905 i->private_host_attrs[count].store = NULL; \ 1906 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1907 count++ 1908 1909 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1910 { \ 1911 i->private_host_attrs[count] = device_attr_host_##field; \ 1912 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1913 count++; \ 1914 } 1915 1916 1917 /* Fixed Host Attributes */ 1918 1919 static ssize_t 1920 show_fc_host_supported_classes (struct device *dev, 1921 struct device_attribute *attr, char *buf) 1922 { 1923 struct Scsi_Host *shost = transport_class_to_shost(dev); 1924 1925 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1926 return snprintf(buf, 20, "unspecified\n"); 1927 1928 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1929 } 1930 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1931 show_fc_host_supported_classes, NULL); 1932 1933 static ssize_t 1934 show_fc_host_supported_fc4s (struct device *dev, 1935 struct device_attribute *attr, char *buf) 1936 { 1937 struct Scsi_Host *shost = transport_class_to_shost(dev); 1938 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1939 } 1940 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1941 show_fc_host_supported_fc4s, NULL); 1942 1943 static ssize_t 1944 show_fc_host_supported_speeds (struct device *dev, 1945 struct device_attribute *attr, char *buf) 1946 { 1947 struct Scsi_Host *shost = transport_class_to_shost(dev); 1948 1949 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1950 return snprintf(buf, 20, "unknown\n"); 1951 1952 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1953 } 1954 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1955 show_fc_host_supported_speeds, NULL); 1956 1957 1958 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1959 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1960 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1961 unsigned long long); 1962 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1963 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1964 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1965 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1966 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1967 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1968 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1969 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1970 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1971 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1972 1973 1974 /* Dynamic Host Attributes */ 1975 1976 static ssize_t 1977 show_fc_host_active_fc4s (struct device *dev, 1978 struct device_attribute *attr, char *buf) 1979 { 1980 struct Scsi_Host *shost = transport_class_to_shost(dev); 1981 struct fc_internal *i = to_fc_internal(shost->transportt); 1982 1983 if (i->f->get_host_active_fc4s) 1984 i->f->get_host_active_fc4s(shost); 1985 1986 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1987 } 1988 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1989 show_fc_host_active_fc4s, NULL); 1990 1991 static ssize_t 1992 show_fc_host_speed (struct device *dev, 1993 struct device_attribute *attr, char *buf) 1994 { 1995 struct Scsi_Host *shost = transport_class_to_shost(dev); 1996 struct fc_internal *i = to_fc_internal(shost->transportt); 1997 1998 if (i->f->get_host_speed) 1999 i->f->get_host_speed(shost); 2000 2001 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 2002 return snprintf(buf, 20, "unknown\n"); 2003 2004 return get_fc_port_speed_names(fc_host_speed(shost), buf); 2005 } 2006 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 2007 show_fc_host_speed, NULL); 2008 2009 2010 fc_host_rd_attr(port_id, "0x%06x\n", 20); 2011 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 2012 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 2013 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 2014 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 2015 2016 fc_private_host_show_function(system_hostname, "%s\n", 2017 FC_SYMBOLIC_NAME_SIZE + 1, ) 2018 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 2019 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 2020 show_fc_host_system_hostname, store_fc_host_system_hostname); 2021 2022 2023 /* Private Host Attributes */ 2024 2025 static ssize_t 2026 show_fc_private_host_tgtid_bind_type(struct device *dev, 2027 struct device_attribute *attr, char *buf) 2028 { 2029 struct Scsi_Host *shost = transport_class_to_shost(dev); 2030 const char *name; 2031 2032 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 2033 if (!name) 2034 return -EINVAL; 2035 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 2036 } 2037 2038 #define get_list_head_entry(pos, head, member) \ 2039 pos = list_entry((head)->next, typeof(*pos), member) 2040 2041 static ssize_t 2042 store_fc_private_host_tgtid_bind_type(struct device *dev, 2043 struct device_attribute *attr, const char *buf, size_t count) 2044 { 2045 struct Scsi_Host *shost = transport_class_to_shost(dev); 2046 struct fc_rport *rport; 2047 enum fc_tgtid_binding_type val; 2048 unsigned long flags; 2049 2050 if (get_fc_tgtid_bind_type_match(buf, &val)) 2051 return -EINVAL; 2052 2053 /* if changing bind type, purge all unused consistent bindings */ 2054 if (val != fc_host_tgtid_bind_type(shost)) { 2055 spin_lock_irqsave(shost->host_lock, flags); 2056 while (!list_empty(&fc_host_rport_bindings(shost))) { 2057 get_list_head_entry(rport, 2058 &fc_host_rport_bindings(shost), peers); 2059 list_del(&rport->peers); 2060 rport->port_state = FC_PORTSTATE_DELETED; 2061 fc_queue_work(shost, &rport->rport_delete_work); 2062 } 2063 spin_unlock_irqrestore(shost->host_lock, flags); 2064 } 2065 2066 fc_host_tgtid_bind_type(shost) = val; 2067 return count; 2068 } 2069 2070 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 2071 show_fc_private_host_tgtid_bind_type, 2072 store_fc_private_host_tgtid_bind_type); 2073 2074 static ssize_t 2075 store_fc_private_host_issue_lip(struct device *dev, 2076 struct device_attribute *attr, const char *buf, size_t count) 2077 { 2078 struct Scsi_Host *shost = transport_class_to_shost(dev); 2079 struct fc_internal *i = to_fc_internal(shost->transportt); 2080 int ret; 2081 2082 /* ignore any data value written to the attribute */ 2083 if (i->f->issue_fc_host_lip) { 2084 ret = i->f->issue_fc_host_lip(shost); 2085 return ret ? ret: count; 2086 } 2087 2088 return -ENOENT; 2089 } 2090 2091 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 2092 store_fc_private_host_issue_lip); 2093 2094 static ssize_t 2095 store_fc_private_host_dev_loss_tmo(struct device *dev, 2096 struct device_attribute *attr, 2097 const char *buf, size_t count) 2098 { 2099 struct Scsi_Host *shost = transport_class_to_shost(dev); 2100 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2101 struct fc_rport *rport; 2102 unsigned long val, flags; 2103 int rc; 2104 2105 rc = fc_str_to_dev_loss(buf, &val); 2106 if (rc) 2107 return rc; 2108 2109 fc_host_dev_loss_tmo(shost) = val; 2110 spin_lock_irqsave(shost->host_lock, flags); 2111 list_for_each_entry(rport, &fc_host->rports, peers) 2112 fc_rport_set_dev_loss_tmo(rport, val); 2113 spin_unlock_irqrestore(shost->host_lock, flags); 2114 return count; 2115 } 2116 2117 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 2118 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 2119 show_fc_host_dev_loss_tmo, 2120 store_fc_private_host_dev_loss_tmo); 2121 2122 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 2123 2124 /* 2125 * Host Statistics Management 2126 */ 2127 2128 /* Show a given attribute in the statistics group */ 2129 static ssize_t 2130 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 2131 { 2132 struct Scsi_Host *shost = transport_class_to_shost(dev); 2133 struct fc_internal *i = to_fc_internal(shost->transportt); 2134 struct fc_host_statistics *stats; 2135 ssize_t ret = -ENOENT; 2136 2137 if (offset > sizeof(struct fc_host_statistics) || 2138 offset % sizeof(u64) != 0) 2139 WARN_ON(1); 2140 2141 if (i->f->get_fc_host_stats) { 2142 stats = (i->f->get_fc_host_stats)(shost); 2143 if (stats) 2144 ret = snprintf(buf, 20, "0x%llx\n", 2145 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 2146 } 2147 return ret; 2148 } 2149 2150 2151 /* generate a read-only statistics attribute */ 2152 #define fc_host_statistic(name) \ 2153 static ssize_t show_fcstat_##name(struct device *cd, \ 2154 struct device_attribute *attr, \ 2155 char *buf) \ 2156 { \ 2157 return fc_stat_show(cd, buf, \ 2158 offsetof(struct fc_host_statistics, name)); \ 2159 } \ 2160 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 2161 2162 fc_host_statistic(seconds_since_last_reset); 2163 fc_host_statistic(tx_frames); 2164 fc_host_statistic(tx_words); 2165 fc_host_statistic(rx_frames); 2166 fc_host_statistic(rx_words); 2167 fc_host_statistic(lip_count); 2168 fc_host_statistic(nos_count); 2169 fc_host_statistic(error_frames); 2170 fc_host_statistic(dumped_frames); 2171 fc_host_statistic(link_failure_count); 2172 fc_host_statistic(loss_of_sync_count); 2173 fc_host_statistic(loss_of_signal_count); 2174 fc_host_statistic(prim_seq_protocol_err_count); 2175 fc_host_statistic(invalid_tx_word_count); 2176 fc_host_statistic(invalid_crc_count); 2177 fc_host_statistic(fcp_input_requests); 2178 fc_host_statistic(fcp_output_requests); 2179 fc_host_statistic(fcp_control_requests); 2180 fc_host_statistic(fcp_input_megabytes); 2181 fc_host_statistic(fcp_output_megabytes); 2182 fc_host_statistic(fcp_packet_alloc_failures); 2183 fc_host_statistic(fcp_packet_aborts); 2184 fc_host_statistic(fcp_frame_alloc_failures); 2185 fc_host_statistic(fc_no_free_exch); 2186 fc_host_statistic(fc_no_free_exch_xid); 2187 fc_host_statistic(fc_xid_not_found); 2188 fc_host_statistic(fc_xid_busy); 2189 fc_host_statistic(fc_seq_not_found); 2190 fc_host_statistic(fc_non_bls_resp); 2191 fc_host_statistic(cn_sig_warn); 2192 fc_host_statistic(cn_sig_alarm); 2193 2194 2195 #define fc_host_fpin_statistic(name) \ 2196 static ssize_t fc_host_fpinstat_##name(struct device *cd, \ 2197 struct device_attribute *attr, \ 2198 char *buf) \ 2199 { \ 2200 struct Scsi_Host *shost = transport_class_to_shost(cd); \ 2201 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \ 2202 \ 2203 return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \ 2204 } \ 2205 static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL) 2206 2207 fc_host_fpin_statistic(dn); 2208 fc_host_fpin_statistic(dn_unknown); 2209 fc_host_fpin_statistic(dn_timeout); 2210 fc_host_fpin_statistic(dn_unable_to_route); 2211 fc_host_fpin_statistic(dn_device_specific); 2212 fc_host_fpin_statistic(cn); 2213 fc_host_fpin_statistic(cn_clear); 2214 fc_host_fpin_statistic(cn_lost_credit); 2215 fc_host_fpin_statistic(cn_credit_stall); 2216 fc_host_fpin_statistic(cn_oversubscription); 2217 fc_host_fpin_statistic(cn_device_specific); 2218 fc_host_fpin_statistic(li); 2219 fc_host_fpin_statistic(li_failure_unknown); 2220 fc_host_fpin_statistic(li_link_failure_count); 2221 fc_host_fpin_statistic(li_loss_of_sync_count); 2222 fc_host_fpin_statistic(li_loss_of_signals_count); 2223 fc_host_fpin_statistic(li_prim_seq_err_count); 2224 fc_host_fpin_statistic(li_invalid_tx_word_count); 2225 fc_host_fpin_statistic(li_invalid_crc_count); 2226 fc_host_fpin_statistic(li_device_specific); 2227 2228 static ssize_t 2229 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 2230 const char *buf, size_t count) 2231 { 2232 struct Scsi_Host *shost = transport_class_to_shost(dev); 2233 struct fc_internal *i = to_fc_internal(shost->transportt); 2234 2235 /* ignore any data value written to the attribute */ 2236 if (i->f->reset_fc_host_stats) { 2237 i->f->reset_fc_host_stats(shost); 2238 return count; 2239 } 2240 2241 return -ENOENT; 2242 } 2243 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 2244 fc_reset_statistics); 2245 2246 static struct attribute *fc_statistics_attrs[] = { 2247 &device_attr_host_seconds_since_last_reset.attr, 2248 &device_attr_host_tx_frames.attr, 2249 &device_attr_host_tx_words.attr, 2250 &device_attr_host_rx_frames.attr, 2251 &device_attr_host_rx_words.attr, 2252 &device_attr_host_lip_count.attr, 2253 &device_attr_host_nos_count.attr, 2254 &device_attr_host_error_frames.attr, 2255 &device_attr_host_dumped_frames.attr, 2256 &device_attr_host_link_failure_count.attr, 2257 &device_attr_host_loss_of_sync_count.attr, 2258 &device_attr_host_loss_of_signal_count.attr, 2259 &device_attr_host_prim_seq_protocol_err_count.attr, 2260 &device_attr_host_invalid_tx_word_count.attr, 2261 &device_attr_host_invalid_crc_count.attr, 2262 &device_attr_host_fcp_input_requests.attr, 2263 &device_attr_host_fcp_output_requests.attr, 2264 &device_attr_host_fcp_control_requests.attr, 2265 &device_attr_host_fcp_input_megabytes.attr, 2266 &device_attr_host_fcp_output_megabytes.attr, 2267 &device_attr_host_fcp_packet_alloc_failures.attr, 2268 &device_attr_host_fcp_packet_aborts.attr, 2269 &device_attr_host_fcp_frame_alloc_failures.attr, 2270 &device_attr_host_fc_no_free_exch.attr, 2271 &device_attr_host_fc_no_free_exch_xid.attr, 2272 &device_attr_host_fc_xid_not_found.attr, 2273 &device_attr_host_fc_xid_busy.attr, 2274 &device_attr_host_fc_seq_not_found.attr, 2275 &device_attr_host_fc_non_bls_resp.attr, 2276 &device_attr_host_cn_sig_warn.attr, 2277 &device_attr_host_cn_sig_alarm.attr, 2278 &device_attr_host_reset_statistics.attr, 2279 &device_attr_host_fpin_dn.attr, 2280 &device_attr_host_fpin_dn_unknown.attr, 2281 &device_attr_host_fpin_dn_timeout.attr, 2282 &device_attr_host_fpin_dn_unable_to_route.attr, 2283 &device_attr_host_fpin_dn_device_specific.attr, 2284 &device_attr_host_fpin_li.attr, 2285 &device_attr_host_fpin_li_failure_unknown.attr, 2286 &device_attr_host_fpin_li_link_failure_count.attr, 2287 &device_attr_host_fpin_li_loss_of_sync_count.attr, 2288 &device_attr_host_fpin_li_loss_of_signals_count.attr, 2289 &device_attr_host_fpin_li_prim_seq_err_count.attr, 2290 &device_attr_host_fpin_li_invalid_tx_word_count.attr, 2291 &device_attr_host_fpin_li_invalid_crc_count.attr, 2292 &device_attr_host_fpin_li_device_specific.attr, 2293 &device_attr_host_fpin_cn.attr, 2294 &device_attr_host_fpin_cn_clear.attr, 2295 &device_attr_host_fpin_cn_lost_credit.attr, 2296 &device_attr_host_fpin_cn_credit_stall.attr, 2297 &device_attr_host_fpin_cn_oversubscription.attr, 2298 &device_attr_host_fpin_cn_device_specific.attr, 2299 NULL 2300 }; 2301 2302 static struct attribute_group fc_statistics_group = { 2303 .name = "statistics", 2304 .attrs = fc_statistics_attrs, 2305 }; 2306 2307 2308 /* Host Vport Attributes */ 2309 2310 static int 2311 fc_parse_wwn(const char *ns, u64 *nm) 2312 { 2313 unsigned int i, j; 2314 u8 wwn[8]; 2315 2316 memset(wwn, 0, sizeof(wwn)); 2317 2318 /* Validate and store the new name */ 2319 for (i=0, j=0; i < 16; i++) { 2320 int value; 2321 2322 value = hex_to_bin(*ns++); 2323 if (value >= 0) 2324 j = (j << 4) | value; 2325 else 2326 return -EINVAL; 2327 if (i % 2) { 2328 wwn[i/2] = j & 0xff; 2329 j = 0; 2330 } 2331 } 2332 2333 *nm = wwn_to_u64(wwn); 2334 2335 return 0; 2336 } 2337 2338 2339 /* 2340 * "Short-cut" sysfs variable to create a new vport on a FC Host. 2341 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 2342 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 2343 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 2344 */ 2345 static ssize_t 2346 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 2347 const char *buf, size_t count) 2348 { 2349 struct Scsi_Host *shost = transport_class_to_shost(dev); 2350 struct fc_vport_identifiers vid; 2351 struct fc_vport *vport; 2352 unsigned int cnt=count; 2353 int stat; 2354 2355 memset(&vid, 0, sizeof(vid)); 2356 2357 /* count may include a LF at end of string */ 2358 if (buf[cnt-1] == '\n') 2359 cnt--; 2360 2361 /* validate we have enough characters for WWPN */ 2362 if ((cnt != (16+1+16)) || (buf[16] != ':')) 2363 return -EINVAL; 2364 2365 stat = fc_parse_wwn(&buf[0], &vid.port_name); 2366 if (stat) 2367 return stat; 2368 2369 stat = fc_parse_wwn(&buf[17], &vid.node_name); 2370 if (stat) 2371 return stat; 2372 2373 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 2374 vid.vport_type = FC_PORTTYPE_NPIV; 2375 /* vid.symbolic_name is already zero/NULL's */ 2376 vid.disable = false; /* always enabled */ 2377 2378 /* we only allow support on Channel 0 !!! */ 2379 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 2380 return stat ? stat : count; 2381 } 2382 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 2383 store_fc_host_vport_create); 2384 2385 2386 /* 2387 * "Short-cut" sysfs variable to delete a vport on a FC Host. 2388 * Vport is identified by a string containing "<WWPN>:<WWNN>". 2389 * The WWNs are specified as hex characters, and may *not* contain 2390 * any prefixes (e.g. 0x, x, etc) 2391 */ 2392 static ssize_t 2393 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 2394 const char *buf, size_t count) 2395 { 2396 struct Scsi_Host *shost = transport_class_to_shost(dev); 2397 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2398 struct fc_vport *vport; 2399 u64 wwpn, wwnn; 2400 unsigned long flags; 2401 unsigned int cnt=count; 2402 int stat, match; 2403 2404 /* count may include a LF at end of string */ 2405 if (buf[cnt-1] == '\n') 2406 cnt--; 2407 2408 /* validate we have enough characters for WWPN */ 2409 if ((cnt != (16+1+16)) || (buf[16] != ':')) 2410 return -EINVAL; 2411 2412 stat = fc_parse_wwn(&buf[0], &wwpn); 2413 if (stat) 2414 return stat; 2415 2416 stat = fc_parse_wwn(&buf[17], &wwnn); 2417 if (stat) 2418 return stat; 2419 2420 spin_lock_irqsave(shost->host_lock, flags); 2421 match = 0; 2422 /* we only allow support on Channel 0 !!! */ 2423 list_for_each_entry(vport, &fc_host->vports, peers) { 2424 if ((vport->channel == 0) && 2425 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 2426 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 2427 break; 2428 vport->flags |= FC_VPORT_DELETING; 2429 match = 1; 2430 break; 2431 } 2432 } 2433 spin_unlock_irqrestore(shost->host_lock, flags); 2434 2435 if (!match) 2436 return -ENODEV; 2437 2438 stat = fc_vport_terminate(vport); 2439 return stat ? stat : count; 2440 } 2441 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 2442 store_fc_host_vport_delete); 2443 2444 2445 static int fc_host_match(struct attribute_container *cont, 2446 struct device *dev) 2447 { 2448 struct Scsi_Host *shost; 2449 struct fc_internal *i; 2450 2451 if (!scsi_is_host_device(dev)) 2452 return 0; 2453 2454 shost = dev_to_shost(dev); 2455 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2456 != &fc_host_class.class) 2457 return 0; 2458 2459 i = to_fc_internal(shost->transportt); 2460 2461 return &i->t.host_attrs.ac == cont; 2462 } 2463 2464 static int fc_target_match(struct attribute_container *cont, 2465 struct device *dev) 2466 { 2467 struct Scsi_Host *shost; 2468 struct fc_internal *i; 2469 2470 if (!scsi_is_target_device(dev)) 2471 return 0; 2472 2473 shost = dev_to_shost(dev->parent); 2474 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2475 != &fc_host_class.class) 2476 return 0; 2477 2478 i = to_fc_internal(shost->transportt); 2479 2480 return &i->t.target_attrs.ac == cont; 2481 } 2482 2483 static void fc_rport_dev_release(struct device *dev) 2484 { 2485 struct fc_rport *rport = dev_to_rport(dev); 2486 put_device(dev->parent); 2487 kfree(rport); 2488 } 2489 2490 int scsi_is_fc_rport(const struct device *dev) 2491 { 2492 return dev->release == fc_rport_dev_release; 2493 } 2494 EXPORT_SYMBOL(scsi_is_fc_rport); 2495 2496 static int fc_rport_match(struct attribute_container *cont, 2497 struct device *dev) 2498 { 2499 struct Scsi_Host *shost; 2500 struct fc_internal *i; 2501 2502 if (!scsi_is_fc_rport(dev)) 2503 return 0; 2504 2505 shost = dev_to_shost(dev->parent); 2506 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2507 != &fc_host_class.class) 2508 return 0; 2509 2510 i = to_fc_internal(shost->transportt); 2511 2512 return &i->rport_attr_cont.ac == cont; 2513 } 2514 2515 2516 static void fc_vport_dev_release(struct device *dev) 2517 { 2518 struct fc_vport *vport = dev_to_vport(dev); 2519 put_device(dev->parent); /* release kobj parent */ 2520 kfree(vport); 2521 } 2522 2523 static int scsi_is_fc_vport(const struct device *dev) 2524 { 2525 return dev->release == fc_vport_dev_release; 2526 } 2527 2528 static int fc_vport_match(struct attribute_container *cont, 2529 struct device *dev) 2530 { 2531 struct fc_vport *vport; 2532 struct Scsi_Host *shost; 2533 struct fc_internal *i; 2534 2535 if (!scsi_is_fc_vport(dev)) 2536 return 0; 2537 vport = dev_to_vport(dev); 2538 2539 shost = vport_to_shost(vport); 2540 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2541 != &fc_host_class.class) 2542 return 0; 2543 2544 i = to_fc_internal(shost->transportt); 2545 return &i->vport_attr_cont.ac == cont; 2546 } 2547 2548 2549 /** 2550 * fc_eh_timed_out - FC Transport I/O timeout intercept handler 2551 * @scmd: The SCSI command which timed out 2552 * 2553 * This routine protects against error handlers getting invoked while a 2554 * rport is in a blocked state, typically due to a temporarily loss of 2555 * connectivity. If the error handlers are allowed to proceed, requests 2556 * to abort i/o, reset the target, etc will likely fail as there is no way 2557 * to communicate with the device to perform the requested function. These 2558 * failures may result in the midlayer taking the device offline, requiring 2559 * manual intervention to restore operation. 2560 * 2561 * This routine, called whenever an i/o times out, validates the state of 2562 * the underlying rport. If the rport is blocked, it returns 2563 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2564 * Eventually, either the device will return, or devloss_tmo will fire, 2565 * and when the timeout then fires, it will be handled normally. 2566 * If the rport is not blocked, normal error handling continues. 2567 * 2568 * Notes: 2569 * This routine assumes no locks are held on entry. 2570 */ 2571 enum scsi_timeout_action fc_eh_timed_out(struct scsi_cmnd *scmd) 2572 { 2573 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2574 2575 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2576 return SCSI_EH_RESET_TIMER; 2577 2578 return SCSI_EH_NOT_HANDLED; 2579 } 2580 EXPORT_SYMBOL(fc_eh_timed_out); 2581 2582 /* 2583 * Called by fc_user_scan to locate an rport on the shost that 2584 * matches the channel and target id, and invoke scsi_scan_target() 2585 * on the rport. 2586 */ 2587 static void 2588 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2589 { 2590 struct fc_rport *rport; 2591 unsigned long flags; 2592 2593 spin_lock_irqsave(shost->host_lock, flags); 2594 2595 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2596 if (rport->scsi_target_id == -1) 2597 continue; 2598 2599 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 2600 (rport->port_state != FC_PORTSTATE_MARGINAL)) 2601 continue; 2602 2603 if ((channel == rport->channel) && 2604 (id == rport->scsi_target_id)) { 2605 spin_unlock_irqrestore(shost->host_lock, flags); 2606 scsi_scan_target(&rport->dev, channel, id, lun, 2607 SCSI_SCAN_MANUAL); 2608 return; 2609 } 2610 } 2611 2612 spin_unlock_irqrestore(shost->host_lock, flags); 2613 } 2614 2615 /* 2616 * Called via sysfs scan routines. Necessary, as the FC transport 2617 * wants to place all target objects below the rport object. So this 2618 * routine must invoke the scsi_scan_target() routine with the rport 2619 * object as the parent. 2620 */ 2621 static int 2622 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2623 { 2624 uint chlo, chhi; 2625 uint tgtlo, tgthi; 2626 2627 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2628 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2629 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2630 return -EINVAL; 2631 2632 if (channel == SCAN_WILD_CARD) { 2633 chlo = 0; 2634 chhi = shost->max_channel + 1; 2635 } else { 2636 chlo = channel; 2637 chhi = channel + 1; 2638 } 2639 2640 if (id == SCAN_WILD_CARD) { 2641 tgtlo = 0; 2642 tgthi = shost->max_id; 2643 } else { 2644 tgtlo = id; 2645 tgthi = id + 1; 2646 } 2647 2648 for ( ; chlo < chhi; chlo++) 2649 for ( ; tgtlo < tgthi; tgtlo++) 2650 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2651 2652 return 0; 2653 } 2654 2655 struct scsi_transport_template * 2656 fc_attach_transport(struct fc_function_template *ft) 2657 { 2658 int count; 2659 struct fc_internal *i = kzalloc_obj(struct fc_internal); 2660 2661 if (unlikely(!i)) 2662 return NULL; 2663 2664 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2665 i->t.target_attrs.ac.class = &fc_transport_class.class; 2666 i->t.target_attrs.ac.match = fc_target_match; 2667 i->t.target_size = sizeof(struct fc_starget_attrs); 2668 transport_container_register(&i->t.target_attrs); 2669 2670 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2671 i->t.host_attrs.ac.class = &fc_host_class.class; 2672 i->t.host_attrs.ac.match = fc_host_match; 2673 i->t.host_size = sizeof(struct fc_host_attrs); 2674 if (ft->get_fc_host_stats) 2675 i->t.host_attrs.statistics = &fc_statistics_group; 2676 transport_container_register(&i->t.host_attrs); 2677 2678 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2679 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2680 i->rport_attr_cont.ac.match = fc_rport_match; 2681 if (ft->get_fc_rport_enc_info) 2682 i->rport_attr_cont.encryption = &fc_rport_encryption_group; 2683 i->rport_attr_cont.statistics = &fc_rport_statistics_group; 2684 transport_container_register(&i->rport_attr_cont); 2685 2686 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2687 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2688 i->vport_attr_cont.ac.match = fc_vport_match; 2689 transport_container_register(&i->vport_attr_cont); 2690 2691 i->f = ft; 2692 2693 /* Transport uses the shost workq for scsi scanning */ 2694 i->t.create_work_queue = 1; 2695 2696 i->t.user_scan = fc_user_scan; 2697 2698 /* 2699 * Setup SCSI Target Attributes. 2700 */ 2701 count = 0; 2702 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2703 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2704 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2705 2706 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2707 2708 i->starget_attrs[count] = NULL; 2709 2710 2711 /* 2712 * Setup SCSI Host Attributes. 2713 */ 2714 count=0; 2715 SETUP_HOST_ATTRIBUTE_RD(node_name); 2716 SETUP_HOST_ATTRIBUTE_RD(port_name); 2717 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2718 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2719 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2720 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2721 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2722 if (ft->vport_create) { 2723 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2724 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2725 } 2726 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2727 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2728 SETUP_HOST_ATTRIBUTE_RD(model); 2729 SETUP_HOST_ATTRIBUTE_RD(model_description); 2730 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2731 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2732 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2733 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2734 2735 SETUP_HOST_ATTRIBUTE_RD(port_id); 2736 SETUP_HOST_ATTRIBUTE_RD(port_type); 2737 SETUP_HOST_ATTRIBUTE_RD(port_state); 2738 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2739 SETUP_HOST_ATTRIBUTE_RD(speed); 2740 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2741 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2742 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2743 2744 /* Transport-managed attributes */ 2745 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2746 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2747 if (ft->issue_fc_host_lip) 2748 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2749 if (ft->vport_create) 2750 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2751 if (ft->vport_delete) 2752 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2753 2754 BUG_ON(count > FC_HOST_NUM_ATTRS); 2755 2756 i->host_attrs[count] = NULL; 2757 2758 /* 2759 * Setup Remote Port Attributes. 2760 */ 2761 count=0; 2762 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2763 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2764 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2765 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2766 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2767 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2768 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2769 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(port_state); 2770 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2771 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2772 2773 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2774 2775 i->rport_attrs[count] = NULL; 2776 2777 /* 2778 * Setup Virtual Port Attributes. 2779 */ 2780 count=0; 2781 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2782 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2783 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2784 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2785 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2786 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2787 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2788 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2789 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2790 2791 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2792 2793 i->vport_attrs[count] = NULL; 2794 2795 return &i->t; 2796 } 2797 EXPORT_SYMBOL(fc_attach_transport); 2798 2799 void fc_release_transport(struct scsi_transport_template *t) 2800 { 2801 struct fc_internal *i = to_fc_internal(t); 2802 2803 transport_container_unregister(&i->t.target_attrs); 2804 transport_container_unregister(&i->t.host_attrs); 2805 transport_container_unregister(&i->rport_attr_cont); 2806 transport_container_unregister(&i->vport_attr_cont); 2807 2808 kfree(i); 2809 } 2810 EXPORT_SYMBOL(fc_release_transport); 2811 2812 /** 2813 * fc_queue_work - Queue work to the fc_host workqueue. 2814 * @shost: Pointer to Scsi_Host bound to fc_host. 2815 * @work: Work to queue for execution. 2816 * 2817 * Return value: 2818 * 1 - work queued for execution 2819 * 0 - work is already queued 2820 * -EINVAL - work queue doesn't exist 2821 */ 2822 static int 2823 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2824 { 2825 if (unlikely(!fc_host_work_q(shost))) { 2826 printk(KERN_ERR 2827 "ERROR: FC host '%s' attempted to queue work, " 2828 "when no workqueue created.\n", shost->hostt->name); 2829 dump_stack(); 2830 2831 return -EINVAL; 2832 } 2833 2834 return queue_work(fc_host_work_q(shost), work); 2835 } 2836 2837 /** 2838 * fc_flush_work - Flush a fc_host's workqueue. 2839 * @shost: Pointer to Scsi_Host bound to fc_host. 2840 */ 2841 static void 2842 fc_flush_work(struct Scsi_Host *shost) 2843 { 2844 if (!fc_host_work_q(shost)) { 2845 printk(KERN_ERR 2846 "ERROR: FC host '%s' attempted to flush work, " 2847 "when no workqueue created.\n", shost->hostt->name); 2848 dump_stack(); 2849 return; 2850 } 2851 2852 flush_workqueue(fc_host_work_q(shost)); 2853 } 2854 2855 /** 2856 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2857 * @shost: Pointer to Scsi_Host bound to fc_host. 2858 * @rport: rport associated with the devloss work 2859 * @work: Work to queue for execution. 2860 * @delay: jiffies to delay the work queuing 2861 * 2862 * Return value: 2863 * 1 on success / 0 already queued / < 0 for error 2864 */ 2865 static int 2866 fc_queue_devloss_work(struct Scsi_Host *shost, struct fc_rport *rport, 2867 struct delayed_work *work, unsigned long delay) 2868 { 2869 if (unlikely(!rport->devloss_work_q)) { 2870 printk(KERN_ERR 2871 "ERROR: FC host '%s' attempted to queue work, " 2872 "when no workqueue created.\n", shost->hostt->name); 2873 dump_stack(); 2874 2875 return -EINVAL; 2876 } 2877 2878 return queue_delayed_work(rport->devloss_work_q, work, delay); 2879 } 2880 2881 /** 2882 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2883 * @shost: Pointer to Scsi_Host bound to fc_host. 2884 * @rport: rport associated with the devloss work 2885 */ 2886 static void 2887 fc_flush_devloss(struct Scsi_Host *shost, struct fc_rport *rport) 2888 { 2889 if (unlikely(!rport->devloss_work_q)) { 2890 printk(KERN_ERR 2891 "ERROR: FC host '%s' attempted to flush work, " 2892 "when no workqueue created.\n", shost->hostt->name); 2893 dump_stack(); 2894 return; 2895 } 2896 2897 flush_workqueue(rport->devloss_work_q); 2898 } 2899 2900 2901 /** 2902 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2903 * @shost: Which &Scsi_Host 2904 * 2905 * This routine is expected to be called immediately preceding the 2906 * a driver's call to scsi_remove_host(). 2907 * 2908 * WARNING: A driver utilizing the fc_transport, which fails to call 2909 * this routine prior to scsi_remove_host(), will leave dangling 2910 * objects in /sys/class/fc_remote_ports. Access to any of these 2911 * objects can result in a system crash !!! 2912 * 2913 * Notes: 2914 * This routine assumes no locks are held on entry. 2915 */ 2916 void 2917 fc_remove_host(struct Scsi_Host *shost) 2918 { 2919 struct fc_vport *vport = NULL, *next_vport = NULL; 2920 struct fc_rport *rport = NULL, *next_rport = NULL; 2921 struct workqueue_struct *work_q; 2922 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2923 unsigned long flags; 2924 2925 spin_lock_irqsave(shost->host_lock, flags); 2926 2927 /* Remove any vports */ 2928 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2929 vport->flags |= FC_VPORT_DELETING; 2930 fc_queue_work(shost, &vport->vport_delete_work); 2931 } 2932 2933 /* Remove any remote ports */ 2934 list_for_each_entry_safe(rport, next_rport, 2935 &fc_host->rports, peers) { 2936 list_del(&rport->peers); 2937 rport->port_state = FC_PORTSTATE_DELETED; 2938 fc_queue_work(shost, &rport->rport_delete_work); 2939 } 2940 2941 list_for_each_entry_safe(rport, next_rport, 2942 &fc_host->rport_bindings, peers) { 2943 list_del(&rport->peers); 2944 rport->port_state = FC_PORTSTATE_DELETED; 2945 fc_queue_work(shost, &rport->rport_delete_work); 2946 } 2947 2948 spin_unlock_irqrestore(shost->host_lock, flags); 2949 2950 /* flush all scan work items */ 2951 scsi_flush_work(shost); 2952 2953 /* flush all stgt delete, and rport delete work items, then kill it */ 2954 if (fc_host->work_q) { 2955 work_q = fc_host->work_q; 2956 fc_host->work_q = NULL; 2957 destroy_workqueue(work_q); 2958 } 2959 } 2960 EXPORT_SYMBOL(fc_remove_host); 2961 2962 static void fc_terminate_rport_io(struct fc_rport *rport) 2963 { 2964 struct Scsi_Host *shost = rport_to_shost(rport); 2965 struct fc_internal *i = to_fc_internal(shost->transportt); 2966 2967 /* Involve the LLDD if possible to terminate all io on the rport. */ 2968 if (i->f->terminate_rport_io) 2969 i->f->terminate_rport_io(rport); 2970 2971 /* 2972 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2973 */ 2974 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2975 } 2976 2977 /** 2978 * fc_starget_delete - called to delete the scsi descendants of an rport 2979 * @work: remote port to be operated on. 2980 * 2981 * Deletes target and all sdevs. 2982 */ 2983 static void 2984 fc_starget_delete(struct work_struct *work) 2985 { 2986 struct fc_rport *rport = 2987 container_of(work, struct fc_rport, stgt_delete_work); 2988 2989 fc_terminate_rport_io(rport); 2990 scsi_remove_target(&rport->dev); 2991 } 2992 2993 2994 /** 2995 * fc_rport_final_delete - finish rport termination and delete it. 2996 * @work: remote port to be deleted. 2997 */ 2998 static void 2999 fc_rport_final_delete(struct work_struct *work) 3000 { 3001 struct fc_rport *rport = 3002 container_of(work, struct fc_rport, rport_delete_work); 3003 struct device *dev = &rport->dev; 3004 struct Scsi_Host *shost = rport_to_shost(rport); 3005 struct fc_internal *i = to_fc_internal(shost->transportt); 3006 struct workqueue_struct *work_q; 3007 unsigned long flags; 3008 int do_callback = 0; 3009 3010 fc_terminate_rport_io(rport); 3011 3012 /* 3013 * if a scan is pending, flush the SCSI Host work_q so that 3014 * that we can reclaim the rport scan work element. 3015 */ 3016 if (rport->flags & FC_RPORT_SCAN_PENDING) 3017 scsi_flush_work(shost); 3018 3019 /* 3020 * Cancel any outstanding timers. These should really exist 3021 * only when rmmod'ing the LLDD and we're asking for 3022 * immediate termination of the rports 3023 */ 3024 spin_lock_irqsave(shost->host_lock, flags); 3025 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 3026 spin_unlock_irqrestore(shost->host_lock, flags); 3027 if (!cancel_delayed_work(&rport->fail_io_work)) 3028 fc_flush_devloss(shost, rport); 3029 if (!cancel_delayed_work(&rport->dev_loss_work)) 3030 fc_flush_devloss(shost, rport); 3031 cancel_work_sync(&rport->scan_work); 3032 spin_lock_irqsave(shost->host_lock, flags); 3033 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3034 } 3035 spin_unlock_irqrestore(shost->host_lock, flags); 3036 3037 /* Delete SCSI target and sdevs */ 3038 if (rport->scsi_target_id != -1) 3039 fc_starget_delete(&rport->stgt_delete_work); 3040 3041 /* 3042 * Notify the driver that the rport is now dead. The LLDD will 3043 * also guarantee that any communication to the rport is terminated 3044 * 3045 * Avoid this call if we already called it when we preserved the 3046 * rport for the binding. 3047 */ 3048 spin_lock_irqsave(shost->host_lock, flags); 3049 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 3050 (i->f->dev_loss_tmo_callbk)) { 3051 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3052 do_callback = 1; 3053 } 3054 spin_unlock_irqrestore(shost->host_lock, flags); 3055 3056 if (do_callback) 3057 i->f->dev_loss_tmo_callbk(rport); 3058 3059 fc_bsg_remove(rport->rqst_q); 3060 3061 if (rport->devloss_work_q) { 3062 work_q = rport->devloss_work_q; 3063 rport->devloss_work_q = NULL; 3064 destroy_workqueue(work_q); 3065 } 3066 3067 transport_remove_device(dev); 3068 device_del(dev); 3069 transport_destroy_device(dev); 3070 scsi_host_put(shost); /* for fc_host->rport list */ 3071 put_device(dev); /* for self-reference */ 3072 } 3073 3074 3075 /** 3076 * fc_remote_port_create - allocates and creates a remote FC port. 3077 * @shost: scsi host the remote port is connected to. 3078 * @channel: Channel on shost port connected to. 3079 * @ids: The world wide names, fc address, and FC4 port 3080 * roles for the remote port. 3081 * 3082 * Allocates and creates the remoter port structure, including the 3083 * class and sysfs creation. 3084 * 3085 * Notes: 3086 * This routine assumes no locks are held on entry. 3087 */ 3088 static struct fc_rport * 3089 fc_remote_port_create(struct Scsi_Host *shost, int channel, 3090 struct fc_rport_identifiers *ids) 3091 { 3092 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3093 struct fc_internal *fci = to_fc_internal(shost->transportt); 3094 struct fc_rport *rport; 3095 struct device *dev; 3096 unsigned long flags; 3097 int error; 3098 size_t size; 3099 3100 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 3101 rport = kzalloc(size, GFP_KERNEL); 3102 if (unlikely(!rport)) { 3103 printk(KERN_ERR "%s: allocation failure\n", __func__); 3104 return NULL; 3105 } 3106 3107 rport->maxframe_size = -1; 3108 rport->supported_classes = FC_COS_UNSPECIFIED; 3109 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 3110 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 3111 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 3112 rport->port_id = ids->port_id; 3113 rport->roles = ids->roles; 3114 rport->port_state = FC_PORTSTATE_ONLINE; 3115 if (fci->f->dd_fcrport_size) 3116 rport->dd_data = &rport[1]; 3117 rport->channel = channel; 3118 rport->fast_io_fail_tmo = -1; 3119 3120 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 3121 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 3122 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 3123 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 3124 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 3125 3126 spin_lock_irqsave(shost->host_lock, flags); 3127 3128 rport->number = fc_host->next_rport_number++; 3129 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) || 3130 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) 3131 rport->scsi_target_id = fc_host->next_target_id++; 3132 else 3133 rport->scsi_target_id = -1; 3134 list_add_tail(&rport->peers, &fc_host->rports); 3135 scsi_host_get(shost); /* for fc_host->rport list */ 3136 3137 spin_unlock_irqrestore(shost->host_lock, flags); 3138 3139 rport->devloss_work_q = alloc_workqueue("fc_dl_%d_%d", WQ_PERCPU, 0, 3140 shost->host_no, rport->number); 3141 if (!rport->devloss_work_q) { 3142 printk(KERN_ERR "FC Remote Port alloc_workqueue failed\n"); 3143 /* 3144 * Note that we have not yet called device_initialize() / get_device() 3145 * Cannot reclaim incremented rport->number because we released host_lock 3146 */ 3147 spin_lock_irqsave(shost->host_lock, flags); 3148 list_del(&rport->peers); 3149 scsi_host_put(shost); /* for fc_host->rport list */ 3150 spin_unlock_irqrestore(shost->host_lock, flags); 3151 kfree(rport); 3152 return NULL; 3153 } 3154 3155 dev = &rport->dev; 3156 device_initialize(dev); /* takes self reference */ 3157 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 3158 dev->release = fc_rport_dev_release; 3159 dev_set_name(dev, "rport-%d:%d-%d", 3160 shost->host_no, channel, rport->number); 3161 transport_setup_device(dev); 3162 3163 error = device_add(dev); 3164 if (error) { 3165 printk(KERN_ERR "FC Remote Port device_add failed\n"); 3166 goto delete_rport; 3167 } 3168 transport_add_device(dev); 3169 transport_configure_device(dev); 3170 3171 fc_bsg_rportadd(shost, rport); 3172 /* ignore any bsg add error - we just can't do sgio */ 3173 3174 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 3175 /* initiate a scan of the target */ 3176 rport->flags |= FC_RPORT_SCAN_PENDING; 3177 scsi_queue_work(shost, &rport->scan_work); 3178 } 3179 3180 return rport; 3181 3182 delete_rport: 3183 transport_destroy_device(dev); 3184 spin_lock_irqsave(shost->host_lock, flags); 3185 list_del(&rport->peers); 3186 scsi_host_put(shost); /* for fc_host->rport list */ 3187 spin_unlock_irqrestore(shost->host_lock, flags); 3188 put_device(dev->parent); 3189 kfree(rport); 3190 return NULL; 3191 } 3192 3193 /** 3194 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 3195 * @shost: scsi host the remote port is connected to. 3196 * @channel: Channel on shost port connected to. 3197 * @ids: The world wide names, fc address, and FC4 port 3198 * roles for the remote port. 3199 * 3200 * The LLDD calls this routine to notify the transport of the existence 3201 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 3202 * of the port, it's FC address (port_id), and the FC4 roles that are 3203 * active for the port. 3204 * 3205 * For ports that are FCP targets (aka scsi targets), the FC transport 3206 * maintains consistent target id bindings on behalf of the LLDD. 3207 * A consistent target id binding is an assignment of a target id to 3208 * a remote port identifier, which persists while the scsi host is 3209 * attached. The remote port can disappear, then later reappear, and 3210 * it's target id assignment remains the same. This allows for shifts 3211 * in FC addressing (if binding by wwpn or wwnn) with no apparent 3212 * changes to the scsi subsystem which is based on scsi host number and 3213 * target id values. Bindings are only valid during the attachment of 3214 * the scsi host. If the host detaches, then later re-attaches, target 3215 * id bindings may change. 3216 * 3217 * This routine is responsible for returning a remote port structure. 3218 * The routine will search the list of remote ports it maintains 3219 * internally on behalf of consistent target id mappings. If found, the 3220 * remote port structure will be reused. Otherwise, a new remote port 3221 * structure will be allocated. 3222 * 3223 * Whenever a remote port is allocated, a new fc_remote_port class 3224 * device is created. 3225 * 3226 * Should not be called from interrupt context. 3227 * 3228 * Notes: 3229 * This routine assumes no locks are held on entry. 3230 */ 3231 struct fc_rport * 3232 fc_remote_port_add(struct Scsi_Host *shost, int channel, 3233 struct fc_rport_identifiers *ids) 3234 { 3235 struct fc_internal *fci = to_fc_internal(shost->transportt); 3236 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3237 struct fc_rport *rport; 3238 unsigned long flags; 3239 int match = 0; 3240 3241 /* ensure any stgt delete functions are done */ 3242 fc_flush_work(shost); 3243 3244 /* 3245 * Search the list of "active" rports, for an rport that has been 3246 * deleted, but we've held off the real delete while the target 3247 * is in a "blocked" state. 3248 */ 3249 spin_lock_irqsave(shost->host_lock, flags); 3250 3251 list_for_each_entry(rport, &fc_host->rports, peers) { 3252 3253 if ((rport->port_state == FC_PORTSTATE_BLOCKED || 3254 rport->port_state == FC_PORTSTATE_NOTPRESENT) && 3255 (rport->channel == channel)) { 3256 3257 switch (fc_host->tgtid_bind_type) { 3258 case FC_TGTID_BIND_BY_WWPN: 3259 case FC_TGTID_BIND_NONE: 3260 if (rport->port_name == ids->port_name) 3261 match = 1; 3262 break; 3263 case FC_TGTID_BIND_BY_WWNN: 3264 if (rport->node_name == ids->node_name) 3265 match = 1; 3266 break; 3267 case FC_TGTID_BIND_BY_ID: 3268 if (rport->port_id == ids->port_id) 3269 match = 1; 3270 break; 3271 } 3272 3273 if (match) { 3274 3275 memcpy(&rport->node_name, &ids->node_name, 3276 sizeof(rport->node_name)); 3277 memcpy(&rport->port_name, &ids->port_name, 3278 sizeof(rport->port_name)); 3279 rport->port_id = ids->port_id; 3280 3281 rport->port_state = FC_PORTSTATE_ONLINE; 3282 rport->roles = ids->roles; 3283 3284 spin_unlock_irqrestore(shost->host_lock, flags); 3285 3286 if (fci->f->dd_fcrport_size) 3287 memset(rport->dd_data, 0, 3288 fci->f->dd_fcrport_size); 3289 3290 /* 3291 * If we were not a target, cancel the 3292 * io terminate and rport timers, and 3293 * we're done. 3294 * 3295 * If we were a target, but our new role 3296 * doesn't indicate a target, leave the 3297 * timers running expecting the role to 3298 * change as the target fully logs in. If 3299 * it doesn't, the target will be torn down. 3300 * 3301 * If we were a target, and our role shows 3302 * we're still a target, cancel the timers 3303 * and kick off a scan. 3304 */ 3305 3306 /* was a target, not in roles */ 3307 if ((rport->scsi_target_id != -1) && 3308 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 3309 return rport; 3310 3311 /* 3312 * Stop the fail io and dev_loss timers. 3313 * If they flush, the port_state will 3314 * be checked and will NOOP the function. 3315 */ 3316 if (!cancel_delayed_work(&rport->fail_io_work)) 3317 fc_flush_devloss(shost, rport); 3318 if (!cancel_delayed_work(&rport->dev_loss_work)) 3319 fc_flush_devloss(shost, rport); 3320 3321 spin_lock_irqsave(shost->host_lock, flags); 3322 3323 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3324 FC_RPORT_DEVLOSS_PENDING | 3325 FC_RPORT_DEVLOSS_CALLBK_DONE); 3326 3327 spin_unlock_irqrestore(shost->host_lock, flags); 3328 3329 /* if target, initiate a scan */ 3330 if (rport->scsi_target_id != -1) { 3331 scsi_target_unblock(&rport->dev, 3332 SDEV_RUNNING); 3333 spin_lock_irqsave(shost->host_lock, 3334 flags); 3335 rport->flags |= FC_RPORT_SCAN_PENDING; 3336 scsi_queue_work(shost, 3337 &rport->scan_work); 3338 spin_unlock_irqrestore(shost->host_lock, 3339 flags); 3340 } 3341 3342 fc_bsg_goose_queue(rport); 3343 3344 return rport; 3345 } 3346 } 3347 } 3348 3349 /* 3350 * Search the bindings array 3351 * Note: if never a FCP target, you won't be on this list 3352 */ 3353 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 3354 3355 /* search for a matching consistent binding */ 3356 3357 list_for_each_entry(rport, &fc_host->rport_bindings, 3358 peers) { 3359 if (rport->channel != channel) 3360 continue; 3361 3362 switch (fc_host->tgtid_bind_type) { 3363 case FC_TGTID_BIND_BY_WWPN: 3364 if (rport->port_name == ids->port_name) 3365 match = 1; 3366 break; 3367 case FC_TGTID_BIND_BY_WWNN: 3368 if (rport->node_name == ids->node_name) 3369 match = 1; 3370 break; 3371 case FC_TGTID_BIND_BY_ID: 3372 if (rport->port_id == ids->port_id) 3373 match = 1; 3374 break; 3375 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3376 break; 3377 } 3378 3379 if (match) { 3380 list_move_tail(&rport->peers, &fc_host->rports); 3381 break; 3382 } 3383 } 3384 3385 if (match) { 3386 memcpy(&rport->node_name, &ids->node_name, 3387 sizeof(rport->node_name)); 3388 memcpy(&rport->port_name, &ids->port_name, 3389 sizeof(rport->port_name)); 3390 rport->port_id = ids->port_id; 3391 rport->port_state = FC_PORTSTATE_ONLINE; 3392 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3393 3394 if (fci->f->dd_fcrport_size) 3395 memset(rport->dd_data, 0, 3396 fci->f->dd_fcrport_size); 3397 spin_unlock_irqrestore(shost->host_lock, flags); 3398 3399 fc_remote_port_rolechg(rport, ids->roles); 3400 return rport; 3401 } 3402 } 3403 3404 spin_unlock_irqrestore(shost->host_lock, flags); 3405 3406 /* No consistent binding found - create new remote port entry */ 3407 rport = fc_remote_port_create(shost, channel, ids); 3408 3409 return rport; 3410 } 3411 EXPORT_SYMBOL(fc_remote_port_add); 3412 3413 3414 /** 3415 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 3416 * @rport: The remote port that no longer exists 3417 * 3418 * The LLDD calls this routine to notify the transport that a remote 3419 * port is no longer part of the topology. Note: Although a port 3420 * may no longer be part of the topology, it may persist in the remote 3421 * ports displayed by the fc_host. We do this under 2 conditions: 3422 * 3423 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 3424 * This allows the port to temporarily disappear, then reappear without 3425 * disrupting the SCSI device tree attached to it. During the "blocked" 3426 * period the port will still exist. 3427 * 3428 * 2) If the port was a scsi target and disappears for longer than we 3429 * expect, we'll delete the port and the tear down the SCSI device tree 3430 * attached to it. However, we want to semi-persist the target id assigned 3431 * to that port if it eventually does exist. The port structure will 3432 * remain (although with minimal information) so that the target id 3433 * bindings also remain. 3434 * 3435 * If the remote port is not an FCP Target, it will be fully torn down 3436 * and deallocated, including the fc_remote_port class device. 3437 * 3438 * If the remote port is an FCP Target, the port will be placed in a 3439 * temporary blocked state. From the LLDD's perspective, the rport no 3440 * longer exists. From the SCSI midlayer's perspective, the SCSI target 3441 * exists, but all sdevs on it are blocked from further I/O. The following 3442 * is then expected. 3443 * 3444 * If the remote port does not return (signaled by a LLDD call to 3445 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 3446 * scsi target is removed - killing all outstanding i/o and removing the 3447 * scsi devices attached to it. The port structure will be marked Not 3448 * Present and be partially cleared, leaving only enough information to 3449 * recognize the remote port relative to the scsi target id binding if 3450 * it later appears. The port will remain as long as there is a valid 3451 * binding (e.g. until the user changes the binding type or unloads the 3452 * scsi host with the binding). 3453 * 3454 * If the remote port returns within the dev_loss_tmo value (and matches 3455 * according to the target id binding type), the port structure will be 3456 * reused. If it is no longer a SCSI target, the target will be torn 3457 * down. If it continues to be a SCSI target, then the target will be 3458 * unblocked (allowing i/o to be resumed), and a scan will be activated 3459 * to ensure that all luns are detected. 3460 * 3461 * Called from normal process context only - cannot be called from interrupt. 3462 * 3463 * Notes: 3464 * This routine assumes no locks are held on entry. 3465 */ 3466 void 3467 fc_remote_port_delete(struct fc_rport *rport) 3468 { 3469 struct Scsi_Host *shost = rport_to_shost(rport); 3470 unsigned long timeout = rport->dev_loss_tmo; 3471 unsigned long flags; 3472 3473 /* 3474 * No need to flush the fc_host work_q's, as all adds are synchronous. 3475 * 3476 * We do need to reclaim the rport scan work element, so eventually 3477 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 3478 * there's still a scan pending. 3479 */ 3480 3481 spin_lock_irqsave(shost->host_lock, flags); 3482 3483 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3484 (rport->port_state != FC_PORTSTATE_MARGINAL)) { 3485 spin_unlock_irqrestore(shost->host_lock, flags); 3486 return; 3487 } 3488 3489 /* 3490 * In the past, we if this was not an FCP-Target, we would 3491 * unconditionally just jump to deleting the rport. 3492 * However, rports can be used as node containers by the LLDD, 3493 * and its not appropriate to just terminate the rport at the 3494 * first sign of a loss in connectivity. The LLDD may want to 3495 * send ELS traffic to re-validate the login. If the rport is 3496 * immediately deleted, it makes it inappropriate for a node 3497 * container. 3498 * So... we now unconditionally wait dev_loss_tmo before 3499 * destroying an rport. 3500 */ 3501 3502 rport->port_state = FC_PORTSTATE_BLOCKED; 3503 3504 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3505 3506 spin_unlock_irqrestore(shost->host_lock, flags); 3507 3508 scsi_block_targets(shost, &rport->dev); 3509 3510 /* see if we need to kill io faster than waiting for device loss */ 3511 if ((rport->fast_io_fail_tmo != -1) && 3512 (rport->fast_io_fail_tmo < timeout)) 3513 fc_queue_devloss_work(shost, rport, &rport->fail_io_work, 3514 rport->fast_io_fail_tmo * HZ); 3515 3516 /* cap the length the devices can be blocked until they are deleted */ 3517 fc_queue_devloss_work(shost, rport, &rport->dev_loss_work, 3518 timeout * HZ); 3519 } 3520 EXPORT_SYMBOL(fc_remote_port_delete); 3521 3522 /** 3523 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3524 * @rport: The remote port that changed. 3525 * @roles: New roles for this port. 3526 * 3527 * Description: The LLDD calls this routine to notify the transport that the 3528 * roles on a remote port may have changed. The largest effect of this is 3529 * if a port now becomes a FCP Target, it must be allocated a 3530 * scsi target id. If the port is no longer a FCP target, any 3531 * scsi target id value assigned to it will persist in case the 3532 * role changes back to include FCP Target. No changes in the scsi 3533 * midlayer will be invoked if the role changes (in the expectation 3534 * that the role will be resumed. If it doesn't normal error processing 3535 * will take place). 3536 * 3537 * Should not be called from interrupt context. 3538 * 3539 * Notes: 3540 * This routine assumes no locks are held on entry. 3541 */ 3542 void 3543 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3544 { 3545 struct Scsi_Host *shost = rport_to_shost(rport); 3546 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3547 unsigned long flags; 3548 int create = 0; 3549 3550 spin_lock_irqsave(shost->host_lock, flags); 3551 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3552 if (rport->scsi_target_id == -1) { 3553 rport->scsi_target_id = fc_host->next_target_id++; 3554 create = 1; 3555 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3556 create = 1; 3557 } 3558 3559 rport->roles = roles; 3560 3561 spin_unlock_irqrestore(shost->host_lock, flags); 3562 3563 if (create) { 3564 /* 3565 * There may have been a delete timer running on the 3566 * port. Ensure that it is cancelled as we now know 3567 * the port is an FCP Target. 3568 * Note: we know the rport exists and is in an online 3569 * state as the LLDD would not have had an rport 3570 * reference to pass us. 3571 * 3572 * Take no action on the timer_delete() failure as the state 3573 * machine state change will validate the 3574 * transaction. 3575 */ 3576 if (!cancel_delayed_work(&rport->fail_io_work)) 3577 fc_flush_devloss(shost, rport); 3578 if (!cancel_delayed_work(&rport->dev_loss_work)) 3579 fc_flush_devloss(shost, rport); 3580 3581 spin_lock_irqsave(shost->host_lock, flags); 3582 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3583 FC_RPORT_DEVLOSS_PENDING | 3584 FC_RPORT_DEVLOSS_CALLBK_DONE); 3585 spin_unlock_irqrestore(shost->host_lock, flags); 3586 3587 /* ensure any stgt delete functions are done */ 3588 fc_flush_work(shost); 3589 3590 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3591 /* initiate a scan of the target */ 3592 spin_lock_irqsave(shost->host_lock, flags); 3593 rport->flags |= FC_RPORT_SCAN_PENDING; 3594 scsi_queue_work(shost, &rport->scan_work); 3595 spin_unlock_irqrestore(shost->host_lock, flags); 3596 } 3597 } 3598 EXPORT_SYMBOL(fc_remote_port_rolechg); 3599 3600 /** 3601 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3602 * @work: rport target that failed to reappear in the allotted time. 3603 * 3604 * Description: An attempt to delete a remote port blocks, and if it fails 3605 * to return in the allotted time this gets called. 3606 */ 3607 static void 3608 fc_timeout_deleted_rport(struct work_struct *work) 3609 { 3610 struct fc_rport *rport = 3611 container_of(work, struct fc_rport, dev_loss_work.work); 3612 struct Scsi_Host *shost = rport_to_shost(rport); 3613 struct fc_internal *i = to_fc_internal(shost->transportt); 3614 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3615 unsigned long flags; 3616 int do_callback = 0; 3617 3618 spin_lock_irqsave(shost->host_lock, flags); 3619 3620 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3621 3622 /* 3623 * If the port is ONLINE, then it came back. If it was a SCSI 3624 * target, validate it still is. If not, tear down the 3625 * scsi_target on it. 3626 */ 3627 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3628 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3629 (rport->scsi_target_id != -1) && 3630 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3631 dev_printk(KERN_ERR, &rport->dev, 3632 "blocked FC remote port time out: no longer" 3633 " a FCP target, removing starget\n"); 3634 spin_unlock_irqrestore(shost->host_lock, flags); 3635 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3636 fc_queue_work(shost, &rport->stgt_delete_work); 3637 return; 3638 } 3639 3640 /* NOOP state - we're flushing workq's */ 3641 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3642 spin_unlock_irqrestore(shost->host_lock, flags); 3643 dev_printk(KERN_ERR, &rport->dev, 3644 "blocked FC remote port time out: leaving" 3645 " rport%s alone\n", 3646 (rport->scsi_target_id != -1) ? " and starget" : ""); 3647 return; 3648 } 3649 3650 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3651 (rport->scsi_target_id == -1)) { 3652 list_del(&rport->peers); 3653 rport->port_state = FC_PORTSTATE_DELETED; 3654 dev_printk(KERN_ERR, &rport->dev, 3655 "blocked FC remote port time out: removing" 3656 " rport%s\n", 3657 (rport->scsi_target_id != -1) ? " and starget" : ""); 3658 fc_queue_work(shost, &rport->rport_delete_work); 3659 spin_unlock_irqrestore(shost->host_lock, flags); 3660 return; 3661 } 3662 3663 dev_printk(KERN_ERR, &rport->dev, 3664 "blocked FC remote port time out: removing target and " 3665 "saving binding\n"); 3666 3667 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3668 3669 /* 3670 * Note: We do not remove or clear the hostdata area. This allows 3671 * host-specific target data to persist along with the 3672 * scsi_target_id. It's up to the host to manage it's hostdata area. 3673 */ 3674 3675 /* 3676 * Reinitialize port attributes that may change if the port comes back. 3677 */ 3678 rport->maxframe_size = -1; 3679 rport->supported_classes = FC_COS_UNSPECIFIED; 3680 rport->roles = FC_PORT_ROLE_UNKNOWN; 3681 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3682 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3683 3684 /* 3685 * Pre-emptively kill I/O rather than waiting for the work queue 3686 * item to teardown the starget. (FCOE libFC folks prefer this 3687 * and to have the rport_port_id still set when it's done). 3688 */ 3689 spin_unlock_irqrestore(shost->host_lock, flags); 3690 fc_terminate_rport_io(rport); 3691 3692 spin_lock_irqsave(shost->host_lock, flags); 3693 3694 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3695 3696 /* remove the identifiers that aren't used in the consisting binding */ 3697 switch (fc_host->tgtid_bind_type) { 3698 case FC_TGTID_BIND_BY_WWPN: 3699 rport->node_name = -1; 3700 rport->port_id = -1; 3701 break; 3702 case FC_TGTID_BIND_BY_WWNN: 3703 rport->port_name = -1; 3704 rport->port_id = -1; 3705 break; 3706 case FC_TGTID_BIND_BY_ID: 3707 rport->node_name = -1; 3708 rport->port_name = -1; 3709 break; 3710 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3711 break; 3712 } 3713 3714 /* 3715 * As this only occurs if the remote port (scsi target) 3716 * went away and didn't come back - we'll remove 3717 * all attached scsi devices. 3718 */ 3719 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3720 fc_queue_work(shost, &rport->stgt_delete_work); 3721 3722 do_callback = 1; 3723 } 3724 3725 spin_unlock_irqrestore(shost->host_lock, flags); 3726 3727 /* 3728 * Notify the driver that the rport is now dead. The LLDD will 3729 * also guarantee that any communication to the rport is terminated 3730 * 3731 * Note: we set the CALLBK_DONE flag above to correspond 3732 */ 3733 if (do_callback && i->f->dev_loss_tmo_callbk) 3734 i->f->dev_loss_tmo_callbk(rport); 3735 } 3736 3737 3738 /** 3739 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3740 * @work: rport to terminate io on. 3741 * 3742 * Notes: Only requests the failure of the io, not that all are flushed 3743 * prior to returning. 3744 */ 3745 static void 3746 fc_timeout_fail_rport_io(struct work_struct *work) 3747 { 3748 struct fc_rport *rport = 3749 container_of(work, struct fc_rport, fail_io_work.work); 3750 3751 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3752 return; 3753 3754 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3755 fc_terminate_rport_io(rport); 3756 } 3757 3758 /** 3759 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3760 * @work: remote port to be scanned. 3761 */ 3762 static void 3763 fc_scsi_scan_rport(struct work_struct *work) 3764 { 3765 struct fc_rport *rport = 3766 container_of(work, struct fc_rport, scan_work); 3767 struct Scsi_Host *shost = rport_to_shost(rport); 3768 struct fc_internal *i = to_fc_internal(shost->transportt); 3769 unsigned long flags; 3770 3771 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3772 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3773 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3774 !(i->f->disable_target_scan)) { 3775 scsi_scan_target(&rport->dev, rport->channel, 3776 rport->scsi_target_id, SCAN_WILD_CARD, 3777 SCSI_SCAN_RESCAN); 3778 } 3779 3780 spin_lock_irqsave(shost->host_lock, flags); 3781 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3782 spin_unlock_irqrestore(shost->host_lock, flags); 3783 } 3784 3785 /** 3786 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport. 3787 * @rport: Remote port that scsi_eh is trying to recover. 3788 * 3789 * This routine can be called from a FC LLD scsi_eh callback. It 3790 * blocks the scsi_eh thread until the fc_rport leaves the 3791 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3792 * necessary to avoid the scsi_eh failing recovery actions for blocked 3793 * rports which would lead to offlined SCSI devices. 3794 * 3795 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3796 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3797 * passed back to scsi_eh. 3798 */ 3799 int fc_block_rport(struct fc_rport *rport) 3800 { 3801 struct Scsi_Host *shost = rport_to_shost(rport); 3802 unsigned long flags; 3803 3804 spin_lock_irqsave(shost->host_lock, flags); 3805 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3806 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3807 spin_unlock_irqrestore(shost->host_lock, flags); 3808 msleep(1000); 3809 spin_lock_irqsave(shost->host_lock, flags); 3810 } 3811 spin_unlock_irqrestore(shost->host_lock, flags); 3812 3813 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3814 return FAST_IO_FAIL; 3815 3816 return 0; 3817 } 3818 EXPORT_SYMBOL(fc_block_rport); 3819 3820 /** 3821 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3822 * @cmnd: SCSI command that scsi_eh is trying to recover 3823 * 3824 * This routine can be called from a FC LLD scsi_eh callback. It 3825 * blocks the scsi_eh thread until the fc_rport leaves the 3826 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3827 * necessary to avoid the scsi_eh failing recovery actions for blocked 3828 * rports which would lead to offlined SCSI devices. 3829 * 3830 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3831 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3832 * passed back to scsi_eh. 3833 */ 3834 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3835 { 3836 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3837 3838 if (WARN_ON_ONCE(!rport)) 3839 return FAST_IO_FAIL; 3840 3841 return fc_block_rport(rport); 3842 } 3843 EXPORT_SYMBOL(fc_block_scsi_eh); 3844 3845 /* 3846 * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not 3847 * @scmd: The SCSI command to be checked 3848 * 3849 * This checks the rport state to decide if a cmd is 3850 * retryable. 3851 * 3852 * Returns: true if the rport state is not in marginal state. 3853 */ 3854 bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd) 3855 { 3856 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 3857 3858 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3859 (scsi_cmd_to_rq(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT)) { 3860 set_host_byte(scmd, DID_TRANSPORT_MARGINAL); 3861 return false; 3862 } 3863 return true; 3864 } 3865 EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd); 3866 3867 /** 3868 * fc_vport_setup - allocates and creates a FC virtual port. 3869 * @shost: scsi host the virtual port is connected to. 3870 * @channel: Channel on shost port connected to. 3871 * @pdev: parent device for vport 3872 * @ids: The world wide names, FC4 port roles, etc for 3873 * the virtual port. 3874 * @ret_vport: The pointer to the created vport. 3875 * 3876 * Allocates and creates the vport structure, calls the parent host 3877 * to instantiate the vport, this completes w/ class and sysfs creation. 3878 * 3879 * Notes: 3880 * This routine assumes no locks are held on entry. 3881 */ 3882 static int 3883 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3884 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3885 { 3886 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3887 struct fc_internal *fci = to_fc_internal(shost->transportt); 3888 struct fc_vport *vport; 3889 struct device *dev; 3890 unsigned long flags; 3891 size_t size; 3892 int error; 3893 3894 *ret_vport = NULL; 3895 3896 if ( ! fci->f->vport_create) 3897 return -ENOENT; 3898 3899 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3900 vport = kzalloc(size, GFP_KERNEL); 3901 if (unlikely(!vport)) { 3902 printk(KERN_ERR "%s: allocation failure\n", __func__); 3903 return -ENOMEM; 3904 } 3905 3906 vport->vport_state = FC_VPORT_UNKNOWN; 3907 vport->vport_last_state = FC_VPORT_UNKNOWN; 3908 vport->node_name = ids->node_name; 3909 vport->port_name = ids->port_name; 3910 vport->roles = ids->roles; 3911 vport->vport_type = ids->vport_type; 3912 if (fci->f->dd_fcvport_size) 3913 vport->dd_data = &vport[1]; 3914 vport->shost = shost; 3915 vport->channel = channel; 3916 vport->flags = FC_VPORT_CREATING; 3917 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3918 3919 spin_lock_irqsave(shost->host_lock, flags); 3920 3921 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3922 spin_unlock_irqrestore(shost->host_lock, flags); 3923 kfree(vport); 3924 return -ENOSPC; 3925 } 3926 fc_host->npiv_vports_inuse++; 3927 vport->number = fc_host->next_vport_number++; 3928 list_add_tail(&vport->peers, &fc_host->vports); 3929 scsi_host_get(shost); /* for fc_host->vport list */ 3930 3931 spin_unlock_irqrestore(shost->host_lock, flags); 3932 3933 dev = &vport->dev; 3934 device_initialize(dev); /* takes self reference */ 3935 dev->parent = get_device(pdev); /* takes parent reference */ 3936 dev->release = fc_vport_dev_release; 3937 dev_set_name(dev, "vport-%d:%d-%d", 3938 shost->host_no, channel, vport->number); 3939 transport_setup_device(dev); 3940 3941 error = device_add(dev); 3942 if (error) { 3943 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3944 goto delete_vport; 3945 } 3946 transport_add_device(dev); 3947 transport_configure_device(dev); 3948 3949 error = fci->f->vport_create(vport, ids->disable); 3950 if (error) { 3951 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3952 goto delete_vport_all; 3953 } 3954 3955 /* 3956 * if the parent isn't the physical adapter's Scsi_Host, ensure 3957 * the Scsi_Host at least contains a symlink to the vport. 3958 */ 3959 if (pdev != &shost->shost_gendev) { 3960 error = sysfs_create_link(&shost->shost_gendev.kobj, 3961 &dev->kobj, dev_name(dev)); 3962 if (error) 3963 printk(KERN_ERR 3964 "%s: Cannot create vport symlinks for " 3965 "%s, err=%d\n", 3966 __func__, dev_name(dev), error); 3967 } 3968 spin_lock_irqsave(shost->host_lock, flags); 3969 vport->flags &= ~FC_VPORT_CREATING; 3970 spin_unlock_irqrestore(shost->host_lock, flags); 3971 3972 dev_printk(KERN_NOTICE, pdev, 3973 "%s created via shost%d channel %d\n", dev_name(dev), 3974 shost->host_no, channel); 3975 3976 *ret_vport = vport; 3977 3978 return 0; 3979 3980 delete_vport_all: 3981 transport_remove_device(dev); 3982 device_del(dev); 3983 delete_vport: 3984 transport_destroy_device(dev); 3985 spin_lock_irqsave(shost->host_lock, flags); 3986 list_del(&vport->peers); 3987 scsi_host_put(shost); /* for fc_host->vport list */ 3988 fc_host->npiv_vports_inuse--; 3989 spin_unlock_irqrestore(shost->host_lock, flags); 3990 put_device(dev->parent); 3991 kfree(vport); 3992 3993 return error; 3994 } 3995 3996 /** 3997 * fc_vport_create - Admin App or LLDD requests creation of a vport 3998 * @shost: scsi host the virtual port is connected to. 3999 * @channel: channel on shost port connected to. 4000 * @ids: The world wide names, FC4 port roles, etc for 4001 * the virtual port. 4002 * 4003 * Notes: 4004 * This routine assumes no locks are held on entry. 4005 */ 4006 struct fc_vport * 4007 fc_vport_create(struct Scsi_Host *shost, int channel, 4008 struct fc_vport_identifiers *ids) 4009 { 4010 int stat; 4011 struct fc_vport *vport; 4012 4013 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 4014 ids, &vport); 4015 return stat ? NULL : vport; 4016 } 4017 EXPORT_SYMBOL(fc_vport_create); 4018 4019 /** 4020 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 4021 * @vport: fc_vport to be terminated 4022 * 4023 * Calls the LLDD vport_delete() function, then deallocates and removes 4024 * the vport from the shost and object tree. 4025 * 4026 * Notes: 4027 * This routine assumes no locks are held on entry. 4028 */ 4029 int 4030 fc_vport_terminate(struct fc_vport *vport) 4031 { 4032 struct Scsi_Host *shost = vport_to_shost(vport); 4033 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 4034 struct fc_internal *i = to_fc_internal(shost->transportt); 4035 struct device *dev = &vport->dev; 4036 unsigned long flags; 4037 int stat; 4038 4039 if (i->f->vport_delete) 4040 stat = i->f->vport_delete(vport); 4041 else 4042 stat = -ENOENT; 4043 4044 spin_lock_irqsave(shost->host_lock, flags); 4045 vport->flags &= ~FC_VPORT_DELETING; 4046 if (!stat) { 4047 vport->flags |= FC_VPORT_DELETED; 4048 list_del(&vport->peers); 4049 fc_host->npiv_vports_inuse--; 4050 scsi_host_put(shost); /* for fc_host->vport list */ 4051 } 4052 spin_unlock_irqrestore(shost->host_lock, flags); 4053 4054 if (stat) 4055 return stat; 4056 4057 if (dev->parent != &shost->shost_gendev) 4058 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 4059 transport_remove_device(dev); 4060 device_del(dev); 4061 transport_destroy_device(dev); 4062 4063 /* 4064 * Removing our self-reference should mean our 4065 * release function gets called, which will drop the remaining 4066 * parent reference and free the data structure. 4067 */ 4068 put_device(dev); /* for self-reference */ 4069 4070 return 0; /* SUCCESS */ 4071 } 4072 EXPORT_SYMBOL(fc_vport_terminate); 4073 4074 /** 4075 * fc_vport_sched_delete - workq-based delete request for a vport 4076 * @work: vport to be deleted. 4077 */ 4078 static void 4079 fc_vport_sched_delete(struct work_struct *work) 4080 { 4081 struct fc_vport *vport = 4082 container_of(work, struct fc_vport, vport_delete_work); 4083 int stat; 4084 4085 stat = fc_vport_terminate(vport); 4086 if (stat) 4087 dev_printk(KERN_ERR, vport->dev.parent, 4088 "%s: %s could not be deleted created via " 4089 "shost%d channel %d - error %d\n", __func__, 4090 dev_name(&vport->dev), vport->shost->host_no, 4091 vport->channel, stat); 4092 } 4093 4094 4095 /* 4096 * BSG support 4097 */ 4098 4099 /** 4100 * fc_bsg_job_timeout - handler for when a bsg request timesout 4101 * @req: request that timed out 4102 */ 4103 static enum blk_eh_timer_return 4104 fc_bsg_job_timeout(struct request *req) 4105 { 4106 struct bsg_job *job = blk_mq_rq_to_pdu(req); 4107 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4108 struct fc_rport *rport = fc_bsg_to_rport(job); 4109 struct fc_internal *i = to_fc_internal(shost->transportt); 4110 int err = 0, inflight = 0; 4111 4112 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) 4113 return BLK_EH_RESET_TIMER; 4114 4115 inflight = bsg_job_get(job); 4116 4117 if (inflight && i->f->bsg_timeout) { 4118 /* call LLDD to abort the i/o as it has timed out */ 4119 err = i->f->bsg_timeout(job); 4120 if (err == -EAGAIN) { 4121 bsg_job_put(job); 4122 return BLK_EH_RESET_TIMER; 4123 } else if (err) 4124 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 4125 "abort failed with status %d\n", err); 4126 } 4127 4128 /* the blk_end_sync_io() doesn't check the error */ 4129 if (inflight) 4130 blk_mq_end_request(req, BLK_STS_IOERR); 4131 return BLK_EH_DONE; 4132 } 4133 4134 /** 4135 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 4136 * @shost: scsi host rport attached to 4137 * @job: bsg job to be processed 4138 */ 4139 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4140 { 4141 struct fc_internal *i = to_fc_internal(shost->transportt); 4142 struct fc_bsg_request *bsg_request = job->request; 4143 struct fc_bsg_reply *bsg_reply = job->reply; 4144 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4145 int ret; 4146 4147 /* check if we really have all the request data needed */ 4148 if (job->request_len < cmdlen) { 4149 ret = -ENOMSG; 4150 goto fail_host_msg; 4151 } 4152 4153 /* Validate the host command */ 4154 switch (bsg_request->msgcode) { 4155 case FC_BSG_HST_ADD_RPORT: 4156 cmdlen += sizeof(struct fc_bsg_host_add_rport); 4157 break; 4158 4159 case FC_BSG_HST_DEL_RPORT: 4160 cmdlen += sizeof(struct fc_bsg_host_del_rport); 4161 break; 4162 4163 case FC_BSG_HST_ELS_NOLOGIN: 4164 cmdlen += sizeof(struct fc_bsg_host_els); 4165 /* there better be a xmt and rcv payloads */ 4166 if ((!job->request_payload.payload_len) || 4167 (!job->reply_payload.payload_len)) { 4168 ret = -EINVAL; 4169 goto fail_host_msg; 4170 } 4171 break; 4172 4173 case FC_BSG_HST_CT: 4174 cmdlen += sizeof(struct fc_bsg_host_ct); 4175 /* there better be xmt and rcv payloads */ 4176 if ((!job->request_payload.payload_len) || 4177 (!job->reply_payload.payload_len)) { 4178 ret = -EINVAL; 4179 goto fail_host_msg; 4180 } 4181 break; 4182 4183 case FC_BSG_HST_VENDOR: 4184 cmdlen += sizeof(struct fc_bsg_host_vendor); 4185 if ((shost->hostt->vendor_id == 0L) || 4186 (bsg_request->rqst_data.h_vendor.vendor_id != 4187 shost->hostt->vendor_id)) { 4188 ret = -ESRCH; 4189 goto fail_host_msg; 4190 } 4191 break; 4192 4193 default: 4194 ret = -EBADR; 4195 goto fail_host_msg; 4196 } 4197 4198 ret = i->f->bsg_request(job); 4199 if (!ret) 4200 return 0; 4201 4202 fail_host_msg: 4203 /* return the errno failure code as the only status */ 4204 BUG_ON(job->reply_len < sizeof(uint32_t)); 4205 bsg_reply->reply_payload_rcv_len = 0; 4206 bsg_reply->result = ret; 4207 job->reply_len = sizeof(uint32_t); 4208 bsg_job_done(job, bsg_reply->result, 4209 bsg_reply->reply_payload_rcv_len); 4210 return 0; 4211 } 4212 4213 4214 /* 4215 * fc_bsg_goose_queue - restart rport queue in case it was stopped 4216 * @rport: rport to be restarted 4217 */ 4218 static void 4219 fc_bsg_goose_queue(struct fc_rport *rport) 4220 { 4221 struct request_queue *q = rport->rqst_q; 4222 4223 if (q) 4224 blk_mq_run_hw_queues(q, true); 4225 } 4226 4227 /** 4228 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 4229 * @shost: scsi host rport attached to 4230 * @job: bsg job to be processed 4231 */ 4232 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4233 { 4234 struct fc_internal *i = to_fc_internal(shost->transportt); 4235 struct fc_bsg_request *bsg_request = job->request; 4236 struct fc_bsg_reply *bsg_reply = job->reply; 4237 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4238 int ret; 4239 4240 /* check if we really have all the request data needed */ 4241 if (job->request_len < cmdlen) { 4242 ret = -ENOMSG; 4243 goto fail_rport_msg; 4244 } 4245 4246 /* Validate the rport command */ 4247 switch (bsg_request->msgcode) { 4248 case FC_BSG_RPT_ELS: 4249 cmdlen += sizeof(struct fc_bsg_rport_els); 4250 goto check_bidi; 4251 4252 case FC_BSG_RPT_CT: 4253 cmdlen += sizeof(struct fc_bsg_rport_ct); 4254 check_bidi: 4255 /* there better be xmt and rcv payloads */ 4256 if ((!job->request_payload.payload_len) || 4257 (!job->reply_payload.payload_len)) { 4258 ret = -EINVAL; 4259 goto fail_rport_msg; 4260 } 4261 break; 4262 default: 4263 ret = -EBADR; 4264 goto fail_rport_msg; 4265 } 4266 4267 ret = i->f->bsg_request(job); 4268 if (!ret) 4269 return 0; 4270 4271 fail_rport_msg: 4272 /* return the errno failure code as the only status */ 4273 BUG_ON(job->reply_len < sizeof(uint32_t)); 4274 bsg_reply->reply_payload_rcv_len = 0; 4275 bsg_reply->result = ret; 4276 job->reply_len = sizeof(uint32_t); 4277 bsg_job_done(job, bsg_reply->result, 4278 bsg_reply->reply_payload_rcv_len); 4279 return 0; 4280 } 4281 4282 static int fc_bsg_dispatch(struct bsg_job *job) 4283 { 4284 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4285 4286 if (scsi_is_fc_rport(job->dev)) 4287 return fc_bsg_rport_dispatch(shost, job); 4288 else 4289 return fc_bsg_host_dispatch(shost, job); 4290 } 4291 4292 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport) 4293 { 4294 if (rport->port_state == FC_PORTSTATE_BLOCKED && 4295 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 4296 return BLK_STS_RESOURCE; 4297 4298 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 4299 (rport->port_state != FC_PORTSTATE_MARGINAL)) 4300 return BLK_STS_IOERR; 4301 4302 return BLK_STS_OK; 4303 } 4304 4305 4306 static int fc_bsg_dispatch_prep(struct bsg_job *job) 4307 { 4308 struct fc_rport *rport = fc_bsg_to_rport(job); 4309 blk_status_t ret; 4310 4311 ret = fc_bsg_rport_prep(rport); 4312 switch (ret) { 4313 case BLK_STS_OK: 4314 break; 4315 case BLK_STS_RESOURCE: 4316 return -EAGAIN; 4317 default: 4318 return -EIO; 4319 } 4320 4321 return fc_bsg_dispatch(job); 4322 } 4323 4324 /** 4325 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4326 * @shost: shost for fc_host 4327 * @fc_host: fc_host adding the structures to 4328 */ 4329 static int 4330 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4331 { 4332 struct device *dev = &shost->shost_gendev; 4333 struct fc_internal *i = to_fc_internal(shost->transportt); 4334 struct queue_limits lim; 4335 struct request_queue *q; 4336 char bsg_name[20]; 4337 4338 fc_host->rqst_q = NULL; 4339 4340 if (!i->f->bsg_request) 4341 return -ENOTSUPP; 4342 4343 snprintf(bsg_name, sizeof(bsg_name), 4344 "fc_host%d", shost->host_no); 4345 scsi_init_limits(shost, &lim); 4346 lim.max_segments = min_not_zero(lim.max_segments, i->f->max_bsg_segments); 4347 q = bsg_setup_queue(dev, bsg_name, &lim, fc_bsg_dispatch, 4348 fc_bsg_job_timeout, i->f->dd_bsg_size); 4349 if (IS_ERR(q)) { 4350 dev_err(dev, 4351 "fc_host%d: bsg interface failed to initialize - setup queue\n", 4352 shost->host_no); 4353 return PTR_ERR(q); 4354 } 4355 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4356 fc_host->rqst_q = q; 4357 return 0; 4358 } 4359 4360 /** 4361 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4362 * @shost: shost that rport is attached to 4363 * @rport: rport that the bsg hooks are being attached to 4364 */ 4365 static int 4366 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4367 { 4368 struct device *dev = &rport->dev; 4369 struct fc_internal *i = to_fc_internal(shost->transportt); 4370 struct queue_limits lim; 4371 struct request_queue *q; 4372 4373 rport->rqst_q = NULL; 4374 4375 if (!i->f->bsg_request) 4376 return -ENOTSUPP; 4377 4378 scsi_init_limits(shost, &lim); 4379 lim.max_segments = min_not_zero(lim.max_segments, i->f->max_bsg_segments); 4380 q = bsg_setup_queue(dev, dev_name(dev), &lim, fc_bsg_dispatch_prep, 4381 fc_bsg_job_timeout, i->f->dd_bsg_size); 4382 if (IS_ERR(q)) { 4383 dev_err(dev, "failed to setup bsg queue\n"); 4384 return PTR_ERR(q); 4385 } 4386 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4387 rport->rqst_q = q; 4388 return 0; 4389 } 4390 4391 4392 /** 4393 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4394 * @q: the request_queue that is to be torn down. 4395 * 4396 * Notes: 4397 * Before unregistering the queue empty any requests that are blocked 4398 * 4399 * 4400 */ 4401 static void 4402 fc_bsg_remove(struct request_queue *q) 4403 { 4404 bsg_remove_queue(q); 4405 } 4406 4407 4408 /* Original Author: Martin Hicks */ 4409 MODULE_AUTHOR("James Smart"); 4410 MODULE_DESCRIPTION("FC Transport Attributes"); 4411 MODULE_LICENSE("GPL"); 4412 4413 module_init(fc_transport_init); 4414 module_exit(fc_transport_exit); 4415