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 /* 741 * fc_fpin_li_stats_update - routine to update Link Integrity 742 * event statistics. 743 * @shost: host the FPIN was received on 744 * @tlv: pointer to link integrity descriptor 745 * 746 */ 747 static void 748 fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv) 749 { 750 u8 i; 751 struct fc_rport *rport = NULL; 752 struct fc_rport *attach_rport = NULL; 753 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 754 struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv; 755 u16 event_type = be16_to_cpu(li_desc->event_type); 756 u64 wwpn; 757 758 rport = fc_find_rport_by_wwpn(shost, 759 be64_to_cpu(li_desc->attached_wwpn)); 760 if (rport && 761 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 762 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 763 attach_rport = rport; 764 fc_li_stats_update(event_type, &attach_rport->fpin_stats); 765 } 766 767 if (be32_to_cpu(li_desc->pname_count) > 0) { 768 for (i = 0; 769 i < be32_to_cpu(li_desc->pname_count); 770 i++) { 771 wwpn = be64_to_cpu(li_desc->pname_list[i]); 772 rport = fc_find_rport_by_wwpn(shost, wwpn); 773 if (rport && 774 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 775 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 776 if (rport == attach_rport) 777 continue; 778 fc_li_stats_update(event_type, 779 &rport->fpin_stats); 780 } 781 } 782 } 783 784 if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn)) 785 fc_li_stats_update(event_type, &fc_host->fpin_stats); 786 } 787 788 /* 789 * fc_fpin_delivery_stats_update - routine to update Delivery Notification 790 * event statistics. 791 * @shost: host the FPIN was received on 792 * @tlv: pointer to delivery descriptor 793 * 794 */ 795 static void 796 fc_fpin_delivery_stats_update(struct Scsi_Host *shost, 797 struct fc_tlv_desc *tlv) 798 { 799 struct fc_rport *rport = NULL; 800 struct fc_rport *attach_rport = NULL; 801 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 802 struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv; 803 u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code); 804 805 rport = fc_find_rport_by_wwpn(shost, 806 be64_to_cpu(dn_desc->attached_wwpn)); 807 if (rport && 808 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 809 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 810 attach_rport = rport; 811 fc_delivery_stats_update(reason_code, 812 &attach_rport->fpin_stats); 813 } 814 815 if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn)) 816 fc_delivery_stats_update(reason_code, &fc_host->fpin_stats); 817 } 818 819 /* 820 * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion 821 * event statistics. 822 * @shost: host the FPIN was received on 823 * @tlv: pointer to peer congestion descriptor 824 * 825 */ 826 static void 827 fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost, 828 struct fc_tlv_desc *tlv) 829 { 830 u8 i; 831 struct fc_rport *rport = NULL; 832 struct fc_rport *attach_rport = NULL; 833 struct fc_fn_peer_congn_desc *pc_desc = 834 (struct fc_fn_peer_congn_desc *)tlv; 835 u16 event_type = be16_to_cpu(pc_desc->event_type); 836 u64 wwpn; 837 838 rport = fc_find_rport_by_wwpn(shost, 839 be64_to_cpu(pc_desc->attached_wwpn)); 840 if (rport && 841 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 842 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 843 attach_rport = rport; 844 fc_cn_stats_update(event_type, &attach_rport->fpin_stats); 845 } 846 847 if (be32_to_cpu(pc_desc->pname_count) > 0) { 848 for (i = 0; 849 i < be32_to_cpu(pc_desc->pname_count); 850 i++) { 851 wwpn = be64_to_cpu(pc_desc->pname_list[i]); 852 rport = fc_find_rport_by_wwpn(shost, wwpn); 853 if (rport && 854 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 855 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 856 if (rport == attach_rport) 857 continue; 858 fc_cn_stats_update(event_type, 859 &rport->fpin_stats); 860 } 861 } 862 } 863 } 864 865 /* 866 * fc_fpin_congn_stats_update - routine to update Congestion 867 * event statistics. 868 * @shost: host the FPIN was received on 869 * @tlv: pointer to congestion descriptor 870 * 871 */ 872 static void 873 fc_fpin_congn_stats_update(struct Scsi_Host *shost, 874 struct fc_tlv_desc *tlv) 875 { 876 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 877 struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv; 878 879 fc_cn_stats_update(be16_to_cpu(congn->event_type), 880 &fc_host->fpin_stats); 881 } 882 883 /** 884 * fc_host_fpin_rcv - routine to process a received FPIN. 885 * @shost: host the FPIN was received on 886 * @fpin_len: length of FPIN payload, in bytes 887 * @fpin_buf: pointer to FPIN payload 888 * @event_acknowledge: 1, if LLDD handles this event. 889 * Notes: 890 * This routine assumes no locks are held on entry. 891 */ 892 void 893 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf, 894 u8 event_acknowledge) 895 { 896 struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf; 897 struct fc_tlv_desc *tlv; 898 u32 bytes_remain; 899 u32 dtag; 900 enum fc_host_event_code event_code = 901 event_acknowledge ? FCH_EVT_LINK_FPIN_ACK : FCH_EVT_LINK_FPIN; 902 903 /* Update Statistics */ 904 tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0]; 905 bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc); 906 bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len)); 907 908 while (bytes_remain >= FC_TLV_DESC_HDR_SZ && 909 bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) { 910 dtag = be32_to_cpu(tlv->desc_tag); 911 switch (dtag) { 912 case ELS_DTAG_LNK_INTEGRITY: 913 fc_fpin_li_stats_update(shost, tlv); 914 break; 915 case ELS_DTAG_DELIVERY: 916 fc_fpin_delivery_stats_update(shost, tlv); 917 break; 918 case ELS_DTAG_PEER_CONGEST: 919 fc_fpin_peer_congn_stats_update(shost, tlv); 920 break; 921 case ELS_DTAG_CONGESTION: 922 fc_fpin_congn_stats_update(shost, tlv); 923 } 924 925 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv); 926 tlv = fc_tlv_next_desc(tlv); 927 } 928 929 fc_host_post_fc_event(shost, fc_get_event_number(), 930 event_code, fpin_len, fpin_buf, 0); 931 } 932 EXPORT_SYMBOL(fc_host_fpin_rcv); 933 934 935 static __init int fc_transport_init(void) 936 { 937 int error; 938 939 atomic_set(&fc_event_seq, 0); 940 941 error = transport_class_register(&fc_host_class); 942 if (error) 943 return error; 944 error = transport_class_register(&fc_vport_class); 945 if (error) 946 goto unreg_host_class; 947 error = transport_class_register(&fc_rport_class); 948 if (error) 949 goto unreg_vport_class; 950 error = transport_class_register(&fc_transport_class); 951 if (error) 952 goto unreg_rport_class; 953 return 0; 954 955 unreg_rport_class: 956 transport_class_unregister(&fc_rport_class); 957 unreg_vport_class: 958 transport_class_unregister(&fc_vport_class); 959 unreg_host_class: 960 transport_class_unregister(&fc_host_class); 961 return error; 962 } 963 964 static void __exit fc_transport_exit(void) 965 { 966 transport_class_unregister(&fc_transport_class); 967 transport_class_unregister(&fc_rport_class); 968 transport_class_unregister(&fc_host_class); 969 transport_class_unregister(&fc_vport_class); 970 } 971 972 /* 973 * FC Remote Port Attribute Management 974 */ 975 976 #define fc_rport_show_function(field, format_string, sz, cast) \ 977 static ssize_t \ 978 show_fc_rport_##field (struct device *dev, \ 979 struct device_attribute *attr, char *buf) \ 980 { \ 981 struct fc_rport *rport = transport_class_to_rport(dev); \ 982 struct Scsi_Host *shost = rport_to_shost(rport); \ 983 struct fc_internal *i = to_fc_internal(shost->transportt); \ 984 if ((i->f->get_rport_##field) && \ 985 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 986 (rport->port_state == FC_PORTSTATE_DELETED) || \ 987 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 988 i->f->get_rport_##field(rport); \ 989 return snprintf(buf, sz, format_string, cast rport->field); \ 990 } 991 992 #define fc_rport_store_function(field) \ 993 static ssize_t \ 994 store_fc_rport_##field(struct device *dev, \ 995 struct device_attribute *attr, \ 996 const char *buf, size_t count) \ 997 { \ 998 int val; \ 999 struct fc_rport *rport = transport_class_to_rport(dev); \ 1000 struct Scsi_Host *shost = rport_to_shost(rport); \ 1001 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1002 char *cp; \ 1003 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 1004 (rport->port_state == FC_PORTSTATE_DELETED) || \ 1005 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 1006 return -EBUSY; \ 1007 val = simple_strtoul(buf, &cp, 0); \ 1008 if (*cp && (*cp != '\n')) \ 1009 return -EINVAL; \ 1010 i->f->set_rport_##field(rport, val); \ 1011 return count; \ 1012 } 1013 1014 #define fc_rport_rd_attr(field, format_string, sz) \ 1015 fc_rport_show_function(field, format_string, sz, ) \ 1016 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1017 show_fc_rport_##field, NULL) 1018 1019 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 1020 fc_rport_show_function(field, format_string, sz, (cast)) \ 1021 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1022 show_fc_rport_##field, NULL) 1023 1024 #define fc_rport_rw_attr(field, format_string, sz) \ 1025 fc_rport_show_function(field, format_string, sz, ) \ 1026 fc_rport_store_function(field) \ 1027 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 1028 show_fc_rport_##field, \ 1029 store_fc_rport_##field) 1030 1031 1032 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 1033 static ssize_t \ 1034 show_fc_rport_##field (struct device *dev, \ 1035 struct device_attribute *attr, char *buf) \ 1036 { \ 1037 struct fc_rport *rport = transport_class_to_rport(dev); \ 1038 return snprintf(buf, sz, format_string, cast rport->field); \ 1039 } 1040 1041 #define fc_private_rport_rd_attr(field, format_string, sz) \ 1042 fc_private_rport_show_function(field, format_string, sz, ) \ 1043 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1044 show_fc_rport_##field, NULL) 1045 1046 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 1047 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 1048 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1049 show_fc_rport_##field, NULL) 1050 1051 1052 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 1053 static ssize_t \ 1054 show_fc_rport_##title (struct device *dev, \ 1055 struct device_attribute *attr, char *buf) \ 1056 { \ 1057 struct fc_rport *rport = transport_class_to_rport(dev); \ 1058 const char *name; \ 1059 name = get_fc_##title##_name(rport->title); \ 1060 if (!name) \ 1061 return -EINVAL; \ 1062 return snprintf(buf, maxlen, "%s\n", name); \ 1063 } \ 1064 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 1065 show_fc_rport_##title, NULL) 1066 1067 1068 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 1069 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1070 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 1071 i->private_rport_attrs[count].store = NULL; \ 1072 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1073 if (i->f->show_rport_##field) \ 1074 count++ 1075 1076 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 1077 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1078 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 1079 i->private_rport_attrs[count].store = NULL; \ 1080 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1081 count++ 1082 1083 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 1084 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1085 if (!i->f->set_rport_##field) { \ 1086 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 1087 i->private_rport_attrs[count].store = NULL; \ 1088 } \ 1089 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1090 if (i->f->show_rport_##field) \ 1091 count++ 1092 1093 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 1094 { \ 1095 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1096 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1097 count++; \ 1098 } 1099 1100 1101 /* The FC Transport Remote Port Attributes: */ 1102 1103 /* Fixed Remote Port Attributes */ 1104 1105 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 1106 1107 static ssize_t 1108 show_fc_rport_supported_classes (struct device *dev, 1109 struct device_attribute *attr, char *buf) 1110 { 1111 struct fc_rport *rport = transport_class_to_rport(dev); 1112 if (rport->supported_classes == FC_COS_UNSPECIFIED) 1113 return snprintf(buf, 20, "unspecified\n"); 1114 return get_fc_cos_names(rport->supported_classes, buf); 1115 } 1116 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 1117 show_fc_rport_supported_classes, NULL); 1118 1119 /* Dynamic Remote Port Attributes */ 1120 1121 /* 1122 * dev_loss_tmo attribute 1123 */ 1124 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 1125 { 1126 char *cp; 1127 1128 *val = simple_strtoul(buf, &cp, 0); 1129 if (*cp && (*cp != '\n')) 1130 return -EINVAL; 1131 /* 1132 * Check for overflow; dev_loss_tmo is u32 1133 */ 1134 if (*val > UINT_MAX) 1135 return -EINVAL; 1136 1137 return 0; 1138 } 1139 1140 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 1141 unsigned long val) 1142 { 1143 struct Scsi_Host *shost = rport_to_shost(rport); 1144 struct fc_internal *i = to_fc_internal(shost->transportt); 1145 1146 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 1147 (rport->port_state == FC_PORTSTATE_DELETED) || 1148 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 1149 return -EBUSY; 1150 /* 1151 * Check for overflow; dev_loss_tmo is u32 1152 */ 1153 if (val > UINT_MAX) 1154 return -EINVAL; 1155 1156 /* 1157 * If fast_io_fail is off we have to cap 1158 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 1159 */ 1160 if (rport->fast_io_fail_tmo == -1 && 1161 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 1162 return -EINVAL; 1163 1164 i->f->set_rport_dev_loss_tmo(rport, val); 1165 return 0; 1166 } 1167 1168 fc_rport_show_function(dev_loss_tmo, "%u\n", 20, ) 1169 static ssize_t 1170 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 1171 const char *buf, size_t count) 1172 { 1173 struct fc_rport *rport = transport_class_to_rport(dev); 1174 unsigned long val; 1175 int rc; 1176 1177 rc = fc_str_to_dev_loss(buf, &val); 1178 if (rc) 1179 return rc; 1180 1181 rc = fc_rport_set_dev_loss_tmo(rport, val); 1182 if (rc) 1183 return rc; 1184 return count; 1185 } 1186 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 1187 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 1188 1189 1190 /* Private Remote Port Attributes */ 1191 1192 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1193 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1194 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 1195 1196 static ssize_t 1197 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 1198 char *buf) 1199 { 1200 struct fc_rport *rport = transport_class_to_rport(dev); 1201 1202 /* identify any roles that are port_id specific */ 1203 if ((rport->port_id != -1) && 1204 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 1205 FC_WELLKNOWN_PORTID_MASK) { 1206 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 1207 case FC_FPORT_PORTID: 1208 return snprintf(buf, 30, "Fabric Port\n"); 1209 case FC_FABCTLR_PORTID: 1210 return snprintf(buf, 30, "Fabric Controller\n"); 1211 case FC_DIRSRVR_PORTID: 1212 return snprintf(buf, 30, "Directory Server\n"); 1213 case FC_TIMESRVR_PORTID: 1214 return snprintf(buf, 30, "Time Server\n"); 1215 case FC_MGMTSRVR_PORTID: 1216 return snprintf(buf, 30, "Management Server\n"); 1217 default: 1218 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 1219 } 1220 } else { 1221 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 1222 return snprintf(buf, 20, "unknown\n"); 1223 return get_fc_port_roles_names(rport->roles, buf); 1224 } 1225 } 1226 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 1227 show_fc_rport_roles, NULL); 1228 1229 static ssize_t fc_rport_set_marginal_state(struct device *dev, 1230 struct device_attribute *attr, 1231 const char *buf, size_t count) 1232 { 1233 struct fc_rport *rport = transport_class_to_rport(dev); 1234 enum fc_port_state port_state; 1235 int ret = 0; 1236 1237 ret = get_fc_port_state_match(buf, &port_state); 1238 if (ret) 1239 return -EINVAL; 1240 if (port_state == FC_PORTSTATE_MARGINAL) { 1241 /* 1242 * Change the state to Marginal only if the 1243 * current rport state is Online 1244 * Allow only Online->Marginal 1245 */ 1246 if (rport->port_state == FC_PORTSTATE_ONLINE) 1247 rport->port_state = port_state; 1248 else if (port_state != rport->port_state) 1249 return -EINVAL; 1250 } else if (port_state == FC_PORTSTATE_ONLINE) { 1251 /* 1252 * Change the state to Online only if the 1253 * current rport state is Marginal 1254 * Allow only Marginal->Online 1255 */ 1256 if (rport->port_state == FC_PORTSTATE_MARGINAL) 1257 rport->port_state = port_state; 1258 else if (port_state != rport->port_state) 1259 return -EINVAL; 1260 } else 1261 return -EINVAL; 1262 return count; 1263 } 1264 1265 static ssize_t 1266 show_fc_rport_port_state(struct device *dev, 1267 struct device_attribute *attr, char *buf) 1268 { 1269 const char *name; 1270 struct fc_rport *rport = transport_class_to_rport(dev); 1271 1272 name = get_fc_port_state_name(rport->port_state); 1273 if (!name) 1274 return -EINVAL; 1275 1276 return snprintf(buf, 20, "%s\n", name); 1277 } 1278 1279 static FC_DEVICE_ATTR(rport, port_state, 0444 | 0200, 1280 show_fc_rport_port_state, fc_rport_set_marginal_state); 1281 1282 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 1283 1284 /* 1285 * fast_io_fail_tmo attribute 1286 */ 1287 static ssize_t 1288 show_fc_rport_fast_io_fail_tmo (struct device *dev, 1289 struct device_attribute *attr, char *buf) 1290 { 1291 struct fc_rport *rport = transport_class_to_rport(dev); 1292 1293 if (rport->fast_io_fail_tmo == -1) 1294 return snprintf(buf, 5, "off\n"); 1295 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 1296 } 1297 1298 static ssize_t 1299 store_fc_rport_fast_io_fail_tmo(struct device *dev, 1300 struct device_attribute *attr, const char *buf, 1301 size_t count) 1302 { 1303 int val; 1304 char *cp; 1305 struct fc_rport *rport = transport_class_to_rport(dev); 1306 1307 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 1308 (rport->port_state == FC_PORTSTATE_DELETED) || 1309 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 1310 return -EBUSY; 1311 if (strncmp(buf, "off", 3) == 0) 1312 rport->fast_io_fail_tmo = -1; 1313 else { 1314 val = simple_strtoul(buf, &cp, 0); 1315 if ((*cp && (*cp != '\n')) || (val < 0)) 1316 return -EINVAL; 1317 /* 1318 * Cap fast_io_fail by dev_loss_tmo or 1319 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 1320 */ 1321 if ((val >= rport->dev_loss_tmo) || 1322 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 1323 return -EINVAL; 1324 1325 rport->fast_io_fail_tmo = val; 1326 } 1327 return count; 1328 } 1329 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 1330 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 1331 1332 #define fc_rport_encryption(name) \ 1333 static ssize_t fc_rport_encinfo_##name(struct device *cd, \ 1334 struct device_attribute *attr, \ 1335 char *buf) \ 1336 { \ 1337 struct fc_rport *rport = transport_class_to_rport(cd); \ 1338 struct Scsi_Host *shost = rport_to_shost(rport); \ 1339 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1340 struct fc_encryption_info *info; \ 1341 ssize_t ret = -ENOENT; \ 1342 u32 data; \ 1343 \ 1344 if (i->f->get_fc_rport_enc_info) { \ 1345 info = (i->f->get_fc_rport_enc_info)(rport); \ 1346 if (info) { \ 1347 data = info->name; \ 1348 if (!strcmp(#name, "status")) { \ 1349 ret = scnprintf(buf, \ 1350 FC_RPORT_ENCRYPTION_STATUS_MAX_LEN, \ 1351 "%s\n", \ 1352 data ? "Encrypted" : "Unencrypted"); \ 1353 } \ 1354 } \ 1355 } \ 1356 return ret; \ 1357 } \ 1358 static FC_DEVICE_ATTR(rport, encryption_##name, 0444, fc_rport_encinfo_##name, NULL) \ 1359 1360 fc_rport_encryption(status); 1361 1362 static struct attribute *fc_rport_encryption_attrs[] = { 1363 &device_attr_rport_encryption_status.attr, 1364 NULL 1365 }; 1366 1367 static struct attribute_group fc_rport_encryption_group = { 1368 .name = "encryption", 1369 .attrs = fc_rport_encryption_attrs, 1370 }; 1371 1372 #define fc_rport_fpin_statistic(name) \ 1373 static ssize_t fc_rport_fpinstat_##name(struct device *cd, \ 1374 struct device_attribute *attr, \ 1375 char *buf) \ 1376 { \ 1377 struct fc_rport *rport = transport_class_to_rport(cd); \ 1378 \ 1379 return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \ 1380 } \ 1381 static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL) 1382 1383 fc_rport_fpin_statistic(dn); 1384 fc_rport_fpin_statistic(dn_unknown); 1385 fc_rport_fpin_statistic(dn_timeout); 1386 fc_rport_fpin_statistic(dn_unable_to_route); 1387 fc_rport_fpin_statistic(dn_device_specific); 1388 fc_rport_fpin_statistic(cn); 1389 fc_rport_fpin_statistic(cn_clear); 1390 fc_rport_fpin_statistic(cn_lost_credit); 1391 fc_rport_fpin_statistic(cn_credit_stall); 1392 fc_rport_fpin_statistic(cn_oversubscription); 1393 fc_rport_fpin_statistic(cn_device_specific); 1394 fc_rport_fpin_statistic(li); 1395 fc_rport_fpin_statistic(li_failure_unknown); 1396 fc_rport_fpin_statistic(li_link_failure_count); 1397 fc_rport_fpin_statistic(li_loss_of_sync_count); 1398 fc_rport_fpin_statistic(li_loss_of_signals_count); 1399 fc_rport_fpin_statistic(li_prim_seq_err_count); 1400 fc_rport_fpin_statistic(li_invalid_tx_word_count); 1401 fc_rport_fpin_statistic(li_invalid_crc_count); 1402 fc_rport_fpin_statistic(li_device_specific); 1403 1404 static struct attribute *fc_rport_statistics_attrs[] = { 1405 &device_attr_rport_fpin_dn.attr, 1406 &device_attr_rport_fpin_dn_unknown.attr, 1407 &device_attr_rport_fpin_dn_timeout.attr, 1408 &device_attr_rport_fpin_dn_unable_to_route.attr, 1409 &device_attr_rport_fpin_dn_device_specific.attr, 1410 &device_attr_rport_fpin_li.attr, 1411 &device_attr_rport_fpin_li_failure_unknown.attr, 1412 &device_attr_rport_fpin_li_link_failure_count.attr, 1413 &device_attr_rport_fpin_li_loss_of_sync_count.attr, 1414 &device_attr_rport_fpin_li_loss_of_signals_count.attr, 1415 &device_attr_rport_fpin_li_prim_seq_err_count.attr, 1416 &device_attr_rport_fpin_li_invalid_tx_word_count.attr, 1417 &device_attr_rport_fpin_li_invalid_crc_count.attr, 1418 &device_attr_rport_fpin_li_device_specific.attr, 1419 &device_attr_rport_fpin_cn.attr, 1420 &device_attr_rport_fpin_cn_clear.attr, 1421 &device_attr_rport_fpin_cn_lost_credit.attr, 1422 &device_attr_rport_fpin_cn_credit_stall.attr, 1423 &device_attr_rport_fpin_cn_oversubscription.attr, 1424 &device_attr_rport_fpin_cn_device_specific.attr, 1425 NULL 1426 }; 1427 1428 static struct attribute_group fc_rport_statistics_group = { 1429 .name = "statistics", 1430 .attrs = fc_rport_statistics_attrs, 1431 }; 1432 1433 1434 /* 1435 * FC SCSI Target Attribute Management 1436 */ 1437 1438 /* 1439 * Note: in the target show function we recognize when the remote 1440 * port is in the hierarchy and do not allow the driver to get 1441 * involved in sysfs functions. The driver only gets involved if 1442 * it's the "old" style that doesn't use rports. 1443 */ 1444 #define fc_starget_show_function(field, format_string, sz, cast) \ 1445 static ssize_t \ 1446 show_fc_starget_##field (struct device *dev, \ 1447 struct device_attribute *attr, char *buf) \ 1448 { \ 1449 struct scsi_target *starget = transport_class_to_starget(dev); \ 1450 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1451 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1452 struct fc_rport *rport = starget_to_rport(starget); \ 1453 if (rport) \ 1454 fc_starget_##field(starget) = rport->field; \ 1455 else if (i->f->get_starget_##field) \ 1456 i->f->get_starget_##field(starget); \ 1457 return snprintf(buf, sz, format_string, \ 1458 cast fc_starget_##field(starget)); \ 1459 } 1460 1461 #define fc_starget_rd_attr(field, format_string, sz) \ 1462 fc_starget_show_function(field, format_string, sz, ) \ 1463 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1464 show_fc_starget_##field, NULL) 1465 1466 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1467 fc_starget_show_function(field, format_string, sz, (cast)) \ 1468 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1469 show_fc_starget_##field, NULL) 1470 1471 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1472 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1473 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1474 i->private_starget_attrs[count].store = NULL; \ 1475 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1476 if (i->f->show_starget_##field) \ 1477 count++ 1478 1479 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1480 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1481 if (!i->f->set_starget_##field) { \ 1482 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1483 i->private_starget_attrs[count].store = NULL; \ 1484 } \ 1485 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1486 if (i->f->show_starget_##field) \ 1487 count++ 1488 1489 /* The FC Transport SCSI Target Attributes: */ 1490 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1491 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1492 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1493 1494 1495 /* 1496 * FC Virtual Port Attribute Management 1497 */ 1498 1499 #define fc_vport_show_function(field, format_string, sz, cast) \ 1500 static ssize_t \ 1501 show_fc_vport_##field (struct device *dev, \ 1502 struct device_attribute *attr, char *buf) \ 1503 { \ 1504 struct fc_vport *vport = transport_class_to_vport(dev); \ 1505 struct Scsi_Host *shost = vport_to_shost(vport); \ 1506 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1507 if ((i->f->get_vport_##field) && \ 1508 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1509 i->f->get_vport_##field(vport); \ 1510 return snprintf(buf, sz, format_string, cast vport->field); \ 1511 } 1512 1513 #define fc_vport_store_function(field) \ 1514 static ssize_t \ 1515 store_fc_vport_##field(struct device *dev, \ 1516 struct device_attribute *attr, \ 1517 const char *buf, size_t count) \ 1518 { \ 1519 int val; \ 1520 struct fc_vport *vport = transport_class_to_vport(dev); \ 1521 struct Scsi_Host *shost = vport_to_shost(vport); \ 1522 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1523 char *cp; \ 1524 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1525 return -EBUSY; \ 1526 val = simple_strtoul(buf, &cp, 0); \ 1527 if (*cp && (*cp != '\n')) \ 1528 return -EINVAL; \ 1529 i->f->set_vport_##field(vport, val); \ 1530 return count; \ 1531 } 1532 1533 #define fc_vport_store_str_function(field, slen) \ 1534 static ssize_t \ 1535 store_fc_vport_##field(struct device *dev, \ 1536 struct device_attribute *attr, \ 1537 const char *buf, size_t count) \ 1538 { \ 1539 struct fc_vport *vport = transport_class_to_vport(dev); \ 1540 struct Scsi_Host *shost = vport_to_shost(vport); \ 1541 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1542 unsigned int cnt=count; \ 1543 \ 1544 /* count may include a LF at end of string */ \ 1545 if (buf[cnt-1] == '\n') \ 1546 cnt--; \ 1547 if (cnt > ((slen) - 1)) \ 1548 return -EINVAL; \ 1549 memcpy(vport->field, buf, cnt); \ 1550 i->f->set_vport_##field(vport); \ 1551 return count; \ 1552 } 1553 1554 #define fc_vport_rd_attr(field, format_string, sz) \ 1555 fc_vport_show_function(field, format_string, sz, ) \ 1556 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1557 show_fc_vport_##field, NULL) 1558 1559 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1560 fc_vport_show_function(field, format_string, sz, (cast)) \ 1561 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1562 show_fc_vport_##field, NULL) 1563 1564 #define fc_vport_rw_attr(field, format_string, sz) \ 1565 fc_vport_show_function(field, format_string, sz, ) \ 1566 fc_vport_store_function(field) \ 1567 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1568 show_fc_vport_##field, \ 1569 store_fc_vport_##field) 1570 1571 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1572 static ssize_t \ 1573 show_fc_vport_##field (struct device *dev, \ 1574 struct device_attribute *attr, char *buf) \ 1575 { \ 1576 struct fc_vport *vport = transport_class_to_vport(dev); \ 1577 return snprintf(buf, sz, format_string, cast vport->field); \ 1578 } 1579 1580 #define fc_private_vport_store_u32_function(field) \ 1581 static ssize_t \ 1582 store_fc_vport_##field(struct device *dev, \ 1583 struct device_attribute *attr, \ 1584 const char *buf, size_t count) \ 1585 { \ 1586 u32 val; \ 1587 struct fc_vport *vport = transport_class_to_vport(dev); \ 1588 char *cp; \ 1589 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1590 return -EBUSY; \ 1591 val = simple_strtoul(buf, &cp, 0); \ 1592 if (*cp && (*cp != '\n')) \ 1593 return -EINVAL; \ 1594 vport->field = val; \ 1595 return count; \ 1596 } 1597 1598 1599 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1600 fc_private_vport_show_function(field, format_string, sz, ) \ 1601 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1602 show_fc_vport_##field, NULL) 1603 1604 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1605 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1606 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1607 show_fc_vport_##field, NULL) 1608 1609 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1610 fc_private_vport_show_function(field, format_string, sz, ) \ 1611 fc_private_vport_store_u32_function(field) \ 1612 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1613 show_fc_vport_##field, \ 1614 store_fc_vport_##field) 1615 1616 1617 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1618 static ssize_t \ 1619 show_fc_vport_##title (struct device *dev, \ 1620 struct device_attribute *attr, \ 1621 char *buf) \ 1622 { \ 1623 struct fc_vport *vport = transport_class_to_vport(dev); \ 1624 const char *name; \ 1625 name = get_fc_##title##_name(vport->title); \ 1626 if (!name) \ 1627 return -EINVAL; \ 1628 return snprintf(buf, maxlen, "%s\n", name); \ 1629 } \ 1630 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1631 show_fc_vport_##title, NULL) 1632 1633 1634 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1635 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1636 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1637 i->private_vport_attrs[count].store = NULL; \ 1638 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1639 if (i->f->get_##field) \ 1640 count++ 1641 /* NOTE: Above MACRO differs: checks function not show bit */ 1642 1643 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1644 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1645 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1646 i->private_vport_attrs[count].store = NULL; \ 1647 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1648 count++ 1649 1650 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1651 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1652 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1653 if (i->f->field) \ 1654 count++ 1655 /* NOTE: Above MACRO differs: checks function */ 1656 1657 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1658 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1659 if (!i->f->set_vport_##field) { \ 1660 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1661 i->private_vport_attrs[count].store = NULL; \ 1662 } \ 1663 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1664 count++ 1665 /* NOTE: Above MACRO differs: does not check show bit */ 1666 1667 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1668 { \ 1669 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1670 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1671 count++; \ 1672 } 1673 1674 1675 /* The FC Transport Virtual Port Attributes: */ 1676 1677 /* Fixed Virtual Port Attributes */ 1678 1679 /* Dynamic Virtual Port Attributes */ 1680 1681 /* Private Virtual Port Attributes */ 1682 1683 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1684 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1685 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1686 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1687 1688 static ssize_t 1689 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1690 char *buf) 1691 { 1692 struct fc_vport *vport = transport_class_to_vport(dev); 1693 1694 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1695 return snprintf(buf, 20, "unknown\n"); 1696 return get_fc_port_roles_names(vport->roles, buf); 1697 } 1698 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1699 1700 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1701 1702 fc_private_vport_show_function(symbolic_name, "%s\n", 1703 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1704 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1705 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1706 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1707 1708 static ssize_t 1709 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1710 const char *buf, size_t count) 1711 { 1712 struct fc_vport *vport = transport_class_to_vport(dev); 1713 struct Scsi_Host *shost = vport_to_shost(vport); 1714 unsigned long flags; 1715 1716 spin_lock_irqsave(shost->host_lock, flags); 1717 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1718 spin_unlock_irqrestore(shost->host_lock, flags); 1719 return -EBUSY; 1720 } 1721 vport->flags |= FC_VPORT_DELETING; 1722 spin_unlock_irqrestore(shost->host_lock, flags); 1723 1724 fc_queue_work(shost, &vport->vport_delete_work); 1725 return count; 1726 } 1727 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1728 NULL, store_fc_vport_delete); 1729 1730 1731 /* 1732 * Enable/Disable vport 1733 * Write "1" to disable, write "0" to enable 1734 */ 1735 static ssize_t 1736 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1737 const char *buf, 1738 size_t count) 1739 { 1740 struct fc_vport *vport = transport_class_to_vport(dev); 1741 struct Scsi_Host *shost = vport_to_shost(vport); 1742 struct fc_internal *i = to_fc_internal(shost->transportt); 1743 int stat; 1744 1745 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1746 return -EBUSY; 1747 1748 if (*buf == '0') { 1749 if (vport->vport_state != FC_VPORT_DISABLED) 1750 return -EALREADY; 1751 } else if (*buf == '1') { 1752 if (vport->vport_state == FC_VPORT_DISABLED) 1753 return -EALREADY; 1754 } else 1755 return -EINVAL; 1756 1757 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1758 return stat ? stat : count; 1759 } 1760 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1761 NULL, store_fc_vport_disable); 1762 1763 1764 /* 1765 * Host Attribute Management 1766 */ 1767 1768 #define fc_host_show_function(field, format_string, sz, cast) \ 1769 static ssize_t \ 1770 show_fc_host_##field (struct device *dev, \ 1771 struct device_attribute *attr, char *buf) \ 1772 { \ 1773 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1774 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1775 if (i->f->get_host_##field) \ 1776 i->f->get_host_##field(shost); \ 1777 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1778 } 1779 1780 #define fc_host_store_function(field) \ 1781 static ssize_t \ 1782 store_fc_host_##field(struct device *dev, \ 1783 struct device_attribute *attr, \ 1784 const char *buf, size_t count) \ 1785 { \ 1786 int val; \ 1787 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1788 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1789 char *cp; \ 1790 \ 1791 val = simple_strtoul(buf, &cp, 0); \ 1792 if (*cp && (*cp != '\n')) \ 1793 return -EINVAL; \ 1794 i->f->set_host_##field(shost, val); \ 1795 return count; \ 1796 } 1797 1798 #define fc_host_store_str_function(field, slen) \ 1799 static ssize_t \ 1800 store_fc_host_##field(struct device *dev, \ 1801 struct device_attribute *attr, \ 1802 const char *buf, size_t count) \ 1803 { \ 1804 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1805 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1806 unsigned int cnt=count; \ 1807 \ 1808 /* count may include a LF at end of string */ \ 1809 if (buf[cnt-1] == '\n') \ 1810 cnt--; \ 1811 if (cnt > ((slen) - 1)) \ 1812 return -EINVAL; \ 1813 memcpy(fc_host_##field(shost), buf, cnt); \ 1814 i->f->set_host_##field(shost); \ 1815 return count; \ 1816 } 1817 1818 #define fc_host_rd_attr(field, format_string, sz) \ 1819 fc_host_show_function(field, format_string, sz, ) \ 1820 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1821 show_fc_host_##field, NULL) 1822 1823 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1824 fc_host_show_function(field, format_string, sz, (cast)) \ 1825 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1826 show_fc_host_##field, NULL) 1827 1828 #define fc_host_rw_attr(field, format_string, sz) \ 1829 fc_host_show_function(field, format_string, sz, ) \ 1830 fc_host_store_function(field) \ 1831 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1832 show_fc_host_##field, \ 1833 store_fc_host_##field) 1834 1835 #define fc_host_rd_enum_attr(title, maxlen) \ 1836 static ssize_t \ 1837 show_fc_host_##title (struct device *dev, \ 1838 struct device_attribute *attr, char *buf) \ 1839 { \ 1840 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1841 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1842 const char *name; \ 1843 if (i->f->get_host_##title) \ 1844 i->f->get_host_##title(shost); \ 1845 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1846 if (!name) \ 1847 return -EINVAL; \ 1848 return snprintf(buf, maxlen, "%s\n", name); \ 1849 } \ 1850 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1851 1852 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1853 i->private_host_attrs[count] = device_attr_host_##field; \ 1854 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1855 i->private_host_attrs[count].store = NULL; \ 1856 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1857 if (i->f->show_host_##field) \ 1858 count++ 1859 1860 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1861 i->private_host_attrs[count] = device_attr_host_##field; \ 1862 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1863 i->private_host_attrs[count].store = NULL; \ 1864 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1865 count++ 1866 1867 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1868 i->private_host_attrs[count] = device_attr_host_##field; \ 1869 if (!i->f->set_host_##field) { \ 1870 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1871 i->private_host_attrs[count].store = NULL; \ 1872 } \ 1873 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1874 if (i->f->show_host_##field) \ 1875 count++ 1876 1877 1878 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1879 static ssize_t \ 1880 show_fc_host_##field (struct device *dev, \ 1881 struct device_attribute *attr, char *buf) \ 1882 { \ 1883 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1884 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1885 } 1886 1887 #define fc_private_host_rd_attr(field, format_string, sz) \ 1888 fc_private_host_show_function(field, format_string, sz, ) \ 1889 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1890 show_fc_host_##field, NULL) 1891 1892 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1893 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1894 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1895 show_fc_host_##field, NULL) 1896 1897 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1898 i->private_host_attrs[count] = device_attr_host_##field; \ 1899 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1900 i->private_host_attrs[count].store = NULL; \ 1901 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1902 count++ 1903 1904 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1905 { \ 1906 i->private_host_attrs[count] = device_attr_host_##field; \ 1907 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1908 count++; \ 1909 } 1910 1911 1912 /* Fixed Host Attributes */ 1913 1914 static ssize_t 1915 show_fc_host_supported_classes (struct device *dev, 1916 struct device_attribute *attr, char *buf) 1917 { 1918 struct Scsi_Host *shost = transport_class_to_shost(dev); 1919 1920 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1921 return snprintf(buf, 20, "unspecified\n"); 1922 1923 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1924 } 1925 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1926 show_fc_host_supported_classes, NULL); 1927 1928 static ssize_t 1929 show_fc_host_supported_fc4s (struct device *dev, 1930 struct device_attribute *attr, char *buf) 1931 { 1932 struct Scsi_Host *shost = transport_class_to_shost(dev); 1933 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1934 } 1935 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1936 show_fc_host_supported_fc4s, NULL); 1937 1938 static ssize_t 1939 show_fc_host_supported_speeds (struct device *dev, 1940 struct device_attribute *attr, char *buf) 1941 { 1942 struct Scsi_Host *shost = transport_class_to_shost(dev); 1943 1944 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1945 return snprintf(buf, 20, "unknown\n"); 1946 1947 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1948 } 1949 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1950 show_fc_host_supported_speeds, NULL); 1951 1952 1953 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1954 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1955 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1956 unsigned long long); 1957 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1958 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1959 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1960 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1961 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1962 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1963 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1964 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1965 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1966 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1967 1968 1969 /* Dynamic Host Attributes */ 1970 1971 static ssize_t 1972 show_fc_host_active_fc4s (struct device *dev, 1973 struct device_attribute *attr, char *buf) 1974 { 1975 struct Scsi_Host *shost = transport_class_to_shost(dev); 1976 struct fc_internal *i = to_fc_internal(shost->transportt); 1977 1978 if (i->f->get_host_active_fc4s) 1979 i->f->get_host_active_fc4s(shost); 1980 1981 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1982 } 1983 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1984 show_fc_host_active_fc4s, NULL); 1985 1986 static ssize_t 1987 show_fc_host_speed (struct device *dev, 1988 struct device_attribute *attr, char *buf) 1989 { 1990 struct Scsi_Host *shost = transport_class_to_shost(dev); 1991 struct fc_internal *i = to_fc_internal(shost->transportt); 1992 1993 if (i->f->get_host_speed) 1994 i->f->get_host_speed(shost); 1995 1996 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1997 return snprintf(buf, 20, "unknown\n"); 1998 1999 return get_fc_port_speed_names(fc_host_speed(shost), buf); 2000 } 2001 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 2002 show_fc_host_speed, NULL); 2003 2004 2005 fc_host_rd_attr(port_id, "0x%06x\n", 20); 2006 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 2007 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 2008 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 2009 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 2010 2011 fc_private_host_show_function(system_hostname, "%s\n", 2012 FC_SYMBOLIC_NAME_SIZE + 1, ) 2013 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 2014 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 2015 show_fc_host_system_hostname, store_fc_host_system_hostname); 2016 2017 2018 /* Private Host Attributes */ 2019 2020 static ssize_t 2021 show_fc_private_host_tgtid_bind_type(struct device *dev, 2022 struct device_attribute *attr, char *buf) 2023 { 2024 struct Scsi_Host *shost = transport_class_to_shost(dev); 2025 const char *name; 2026 2027 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 2028 if (!name) 2029 return -EINVAL; 2030 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 2031 } 2032 2033 #define get_list_head_entry(pos, head, member) \ 2034 pos = list_entry((head)->next, typeof(*pos), member) 2035 2036 static ssize_t 2037 store_fc_private_host_tgtid_bind_type(struct device *dev, 2038 struct device_attribute *attr, const char *buf, size_t count) 2039 { 2040 struct Scsi_Host *shost = transport_class_to_shost(dev); 2041 struct fc_rport *rport; 2042 enum fc_tgtid_binding_type val; 2043 unsigned long flags; 2044 2045 if (get_fc_tgtid_bind_type_match(buf, &val)) 2046 return -EINVAL; 2047 2048 /* if changing bind type, purge all unused consistent bindings */ 2049 if (val != fc_host_tgtid_bind_type(shost)) { 2050 spin_lock_irqsave(shost->host_lock, flags); 2051 while (!list_empty(&fc_host_rport_bindings(shost))) { 2052 get_list_head_entry(rport, 2053 &fc_host_rport_bindings(shost), peers); 2054 list_del(&rport->peers); 2055 rport->port_state = FC_PORTSTATE_DELETED; 2056 fc_queue_work(shost, &rport->rport_delete_work); 2057 } 2058 spin_unlock_irqrestore(shost->host_lock, flags); 2059 } 2060 2061 fc_host_tgtid_bind_type(shost) = val; 2062 return count; 2063 } 2064 2065 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 2066 show_fc_private_host_tgtid_bind_type, 2067 store_fc_private_host_tgtid_bind_type); 2068 2069 static ssize_t 2070 store_fc_private_host_issue_lip(struct device *dev, 2071 struct device_attribute *attr, const char *buf, size_t count) 2072 { 2073 struct Scsi_Host *shost = transport_class_to_shost(dev); 2074 struct fc_internal *i = to_fc_internal(shost->transportt); 2075 int ret; 2076 2077 /* ignore any data value written to the attribute */ 2078 if (i->f->issue_fc_host_lip) { 2079 ret = i->f->issue_fc_host_lip(shost); 2080 return ret ? ret: count; 2081 } 2082 2083 return -ENOENT; 2084 } 2085 2086 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 2087 store_fc_private_host_issue_lip); 2088 2089 static ssize_t 2090 store_fc_private_host_dev_loss_tmo(struct device *dev, 2091 struct device_attribute *attr, 2092 const char *buf, size_t count) 2093 { 2094 struct Scsi_Host *shost = transport_class_to_shost(dev); 2095 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2096 struct fc_rport *rport; 2097 unsigned long val, flags; 2098 int rc; 2099 2100 rc = fc_str_to_dev_loss(buf, &val); 2101 if (rc) 2102 return rc; 2103 2104 fc_host_dev_loss_tmo(shost) = val; 2105 spin_lock_irqsave(shost->host_lock, flags); 2106 list_for_each_entry(rport, &fc_host->rports, peers) 2107 fc_rport_set_dev_loss_tmo(rport, val); 2108 spin_unlock_irqrestore(shost->host_lock, flags); 2109 return count; 2110 } 2111 2112 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 2113 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 2114 show_fc_host_dev_loss_tmo, 2115 store_fc_private_host_dev_loss_tmo); 2116 2117 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 2118 2119 /* 2120 * Host Statistics Management 2121 */ 2122 2123 /* Show a given attribute in the statistics group */ 2124 static ssize_t 2125 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 2126 { 2127 struct Scsi_Host *shost = transport_class_to_shost(dev); 2128 struct fc_internal *i = to_fc_internal(shost->transportt); 2129 struct fc_host_statistics *stats; 2130 ssize_t ret = -ENOENT; 2131 2132 if (offset > sizeof(struct fc_host_statistics) || 2133 offset % sizeof(u64) != 0) 2134 WARN_ON(1); 2135 2136 if (i->f->get_fc_host_stats) { 2137 stats = (i->f->get_fc_host_stats)(shost); 2138 if (stats) 2139 ret = snprintf(buf, 20, "0x%llx\n", 2140 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 2141 } 2142 return ret; 2143 } 2144 2145 2146 /* generate a read-only statistics attribute */ 2147 #define fc_host_statistic(name) \ 2148 static ssize_t show_fcstat_##name(struct device *cd, \ 2149 struct device_attribute *attr, \ 2150 char *buf) \ 2151 { \ 2152 return fc_stat_show(cd, buf, \ 2153 offsetof(struct fc_host_statistics, name)); \ 2154 } \ 2155 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 2156 2157 fc_host_statistic(seconds_since_last_reset); 2158 fc_host_statistic(tx_frames); 2159 fc_host_statistic(tx_words); 2160 fc_host_statistic(rx_frames); 2161 fc_host_statistic(rx_words); 2162 fc_host_statistic(lip_count); 2163 fc_host_statistic(nos_count); 2164 fc_host_statistic(error_frames); 2165 fc_host_statistic(dumped_frames); 2166 fc_host_statistic(link_failure_count); 2167 fc_host_statistic(loss_of_sync_count); 2168 fc_host_statistic(loss_of_signal_count); 2169 fc_host_statistic(prim_seq_protocol_err_count); 2170 fc_host_statistic(invalid_tx_word_count); 2171 fc_host_statistic(invalid_crc_count); 2172 fc_host_statistic(fcp_input_requests); 2173 fc_host_statistic(fcp_output_requests); 2174 fc_host_statistic(fcp_control_requests); 2175 fc_host_statistic(fcp_input_megabytes); 2176 fc_host_statistic(fcp_output_megabytes); 2177 fc_host_statistic(fcp_packet_alloc_failures); 2178 fc_host_statistic(fcp_packet_aborts); 2179 fc_host_statistic(fcp_frame_alloc_failures); 2180 fc_host_statistic(fc_no_free_exch); 2181 fc_host_statistic(fc_no_free_exch_xid); 2182 fc_host_statistic(fc_xid_not_found); 2183 fc_host_statistic(fc_xid_busy); 2184 fc_host_statistic(fc_seq_not_found); 2185 fc_host_statistic(fc_non_bls_resp); 2186 fc_host_statistic(cn_sig_warn); 2187 fc_host_statistic(cn_sig_alarm); 2188 2189 2190 #define fc_host_fpin_statistic(name) \ 2191 static ssize_t fc_host_fpinstat_##name(struct device *cd, \ 2192 struct device_attribute *attr, \ 2193 char *buf) \ 2194 { \ 2195 struct Scsi_Host *shost = transport_class_to_shost(cd); \ 2196 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \ 2197 \ 2198 return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \ 2199 } \ 2200 static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL) 2201 2202 fc_host_fpin_statistic(dn); 2203 fc_host_fpin_statistic(dn_unknown); 2204 fc_host_fpin_statistic(dn_timeout); 2205 fc_host_fpin_statistic(dn_unable_to_route); 2206 fc_host_fpin_statistic(dn_device_specific); 2207 fc_host_fpin_statistic(cn); 2208 fc_host_fpin_statistic(cn_clear); 2209 fc_host_fpin_statistic(cn_lost_credit); 2210 fc_host_fpin_statistic(cn_credit_stall); 2211 fc_host_fpin_statistic(cn_oversubscription); 2212 fc_host_fpin_statistic(cn_device_specific); 2213 fc_host_fpin_statistic(li); 2214 fc_host_fpin_statistic(li_failure_unknown); 2215 fc_host_fpin_statistic(li_link_failure_count); 2216 fc_host_fpin_statistic(li_loss_of_sync_count); 2217 fc_host_fpin_statistic(li_loss_of_signals_count); 2218 fc_host_fpin_statistic(li_prim_seq_err_count); 2219 fc_host_fpin_statistic(li_invalid_tx_word_count); 2220 fc_host_fpin_statistic(li_invalid_crc_count); 2221 fc_host_fpin_statistic(li_device_specific); 2222 2223 static ssize_t 2224 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 2225 const char *buf, size_t count) 2226 { 2227 struct Scsi_Host *shost = transport_class_to_shost(dev); 2228 struct fc_internal *i = to_fc_internal(shost->transportt); 2229 2230 /* ignore any data value written to the attribute */ 2231 if (i->f->reset_fc_host_stats) { 2232 i->f->reset_fc_host_stats(shost); 2233 return count; 2234 } 2235 2236 return -ENOENT; 2237 } 2238 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 2239 fc_reset_statistics); 2240 2241 static struct attribute *fc_statistics_attrs[] = { 2242 &device_attr_host_seconds_since_last_reset.attr, 2243 &device_attr_host_tx_frames.attr, 2244 &device_attr_host_tx_words.attr, 2245 &device_attr_host_rx_frames.attr, 2246 &device_attr_host_rx_words.attr, 2247 &device_attr_host_lip_count.attr, 2248 &device_attr_host_nos_count.attr, 2249 &device_attr_host_error_frames.attr, 2250 &device_attr_host_dumped_frames.attr, 2251 &device_attr_host_link_failure_count.attr, 2252 &device_attr_host_loss_of_sync_count.attr, 2253 &device_attr_host_loss_of_signal_count.attr, 2254 &device_attr_host_prim_seq_protocol_err_count.attr, 2255 &device_attr_host_invalid_tx_word_count.attr, 2256 &device_attr_host_invalid_crc_count.attr, 2257 &device_attr_host_fcp_input_requests.attr, 2258 &device_attr_host_fcp_output_requests.attr, 2259 &device_attr_host_fcp_control_requests.attr, 2260 &device_attr_host_fcp_input_megabytes.attr, 2261 &device_attr_host_fcp_output_megabytes.attr, 2262 &device_attr_host_fcp_packet_alloc_failures.attr, 2263 &device_attr_host_fcp_packet_aborts.attr, 2264 &device_attr_host_fcp_frame_alloc_failures.attr, 2265 &device_attr_host_fc_no_free_exch.attr, 2266 &device_attr_host_fc_no_free_exch_xid.attr, 2267 &device_attr_host_fc_xid_not_found.attr, 2268 &device_attr_host_fc_xid_busy.attr, 2269 &device_attr_host_fc_seq_not_found.attr, 2270 &device_attr_host_fc_non_bls_resp.attr, 2271 &device_attr_host_cn_sig_warn.attr, 2272 &device_attr_host_cn_sig_alarm.attr, 2273 &device_attr_host_reset_statistics.attr, 2274 &device_attr_host_fpin_dn.attr, 2275 &device_attr_host_fpin_dn_unknown.attr, 2276 &device_attr_host_fpin_dn_timeout.attr, 2277 &device_attr_host_fpin_dn_unable_to_route.attr, 2278 &device_attr_host_fpin_dn_device_specific.attr, 2279 &device_attr_host_fpin_li.attr, 2280 &device_attr_host_fpin_li_failure_unknown.attr, 2281 &device_attr_host_fpin_li_link_failure_count.attr, 2282 &device_attr_host_fpin_li_loss_of_sync_count.attr, 2283 &device_attr_host_fpin_li_loss_of_signals_count.attr, 2284 &device_attr_host_fpin_li_prim_seq_err_count.attr, 2285 &device_attr_host_fpin_li_invalid_tx_word_count.attr, 2286 &device_attr_host_fpin_li_invalid_crc_count.attr, 2287 &device_attr_host_fpin_li_device_specific.attr, 2288 &device_attr_host_fpin_cn.attr, 2289 &device_attr_host_fpin_cn_clear.attr, 2290 &device_attr_host_fpin_cn_lost_credit.attr, 2291 &device_attr_host_fpin_cn_credit_stall.attr, 2292 &device_attr_host_fpin_cn_oversubscription.attr, 2293 &device_attr_host_fpin_cn_device_specific.attr, 2294 NULL 2295 }; 2296 2297 static struct attribute_group fc_statistics_group = { 2298 .name = "statistics", 2299 .attrs = fc_statistics_attrs, 2300 }; 2301 2302 2303 /* Host Vport Attributes */ 2304 2305 static int 2306 fc_parse_wwn(const char *ns, u64 *nm) 2307 { 2308 unsigned int i, j; 2309 u8 wwn[8]; 2310 2311 memset(wwn, 0, sizeof(wwn)); 2312 2313 /* Validate and store the new name */ 2314 for (i=0, j=0; i < 16; i++) { 2315 int value; 2316 2317 value = hex_to_bin(*ns++); 2318 if (value >= 0) 2319 j = (j << 4) | value; 2320 else 2321 return -EINVAL; 2322 if (i % 2) { 2323 wwn[i/2] = j & 0xff; 2324 j = 0; 2325 } 2326 } 2327 2328 *nm = wwn_to_u64(wwn); 2329 2330 return 0; 2331 } 2332 2333 2334 /* 2335 * "Short-cut" sysfs variable to create a new vport on a FC Host. 2336 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 2337 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 2338 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 2339 */ 2340 static ssize_t 2341 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 2342 const char *buf, size_t count) 2343 { 2344 struct Scsi_Host *shost = transport_class_to_shost(dev); 2345 struct fc_vport_identifiers vid; 2346 struct fc_vport *vport; 2347 unsigned int cnt=count; 2348 int stat; 2349 2350 memset(&vid, 0, sizeof(vid)); 2351 2352 /* count may include a LF at end of string */ 2353 if (buf[cnt-1] == '\n') 2354 cnt--; 2355 2356 /* validate we have enough characters for WWPN */ 2357 if ((cnt != (16+1+16)) || (buf[16] != ':')) 2358 return -EINVAL; 2359 2360 stat = fc_parse_wwn(&buf[0], &vid.port_name); 2361 if (stat) 2362 return stat; 2363 2364 stat = fc_parse_wwn(&buf[17], &vid.node_name); 2365 if (stat) 2366 return stat; 2367 2368 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 2369 vid.vport_type = FC_PORTTYPE_NPIV; 2370 /* vid.symbolic_name is already zero/NULL's */ 2371 vid.disable = false; /* always enabled */ 2372 2373 /* we only allow support on Channel 0 !!! */ 2374 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 2375 return stat ? stat : count; 2376 } 2377 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 2378 store_fc_host_vport_create); 2379 2380 2381 /* 2382 * "Short-cut" sysfs variable to delete a vport on a FC Host. 2383 * Vport is identified by a string containing "<WWPN>:<WWNN>". 2384 * The WWNs are specified as hex characters, and may *not* contain 2385 * any prefixes (e.g. 0x, x, etc) 2386 */ 2387 static ssize_t 2388 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 2389 const char *buf, size_t count) 2390 { 2391 struct Scsi_Host *shost = transport_class_to_shost(dev); 2392 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2393 struct fc_vport *vport; 2394 u64 wwpn, wwnn; 2395 unsigned long flags; 2396 unsigned int cnt=count; 2397 int stat, match; 2398 2399 /* count may include a LF at end of string */ 2400 if (buf[cnt-1] == '\n') 2401 cnt--; 2402 2403 /* validate we have enough characters for WWPN */ 2404 if ((cnt != (16+1+16)) || (buf[16] != ':')) 2405 return -EINVAL; 2406 2407 stat = fc_parse_wwn(&buf[0], &wwpn); 2408 if (stat) 2409 return stat; 2410 2411 stat = fc_parse_wwn(&buf[17], &wwnn); 2412 if (stat) 2413 return stat; 2414 2415 spin_lock_irqsave(shost->host_lock, flags); 2416 match = 0; 2417 /* we only allow support on Channel 0 !!! */ 2418 list_for_each_entry(vport, &fc_host->vports, peers) { 2419 if ((vport->channel == 0) && 2420 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 2421 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 2422 break; 2423 vport->flags |= FC_VPORT_DELETING; 2424 match = 1; 2425 break; 2426 } 2427 } 2428 spin_unlock_irqrestore(shost->host_lock, flags); 2429 2430 if (!match) 2431 return -ENODEV; 2432 2433 stat = fc_vport_terminate(vport); 2434 return stat ? stat : count; 2435 } 2436 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 2437 store_fc_host_vport_delete); 2438 2439 2440 static int fc_host_match(struct attribute_container *cont, 2441 struct device *dev) 2442 { 2443 struct Scsi_Host *shost; 2444 struct fc_internal *i; 2445 2446 if (!scsi_is_host_device(dev)) 2447 return 0; 2448 2449 shost = dev_to_shost(dev); 2450 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2451 != &fc_host_class.class) 2452 return 0; 2453 2454 i = to_fc_internal(shost->transportt); 2455 2456 return &i->t.host_attrs.ac == cont; 2457 } 2458 2459 static int fc_target_match(struct attribute_container *cont, 2460 struct device *dev) 2461 { 2462 struct Scsi_Host *shost; 2463 struct fc_internal *i; 2464 2465 if (!scsi_is_target_device(dev)) 2466 return 0; 2467 2468 shost = dev_to_shost(dev->parent); 2469 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2470 != &fc_host_class.class) 2471 return 0; 2472 2473 i = to_fc_internal(shost->transportt); 2474 2475 return &i->t.target_attrs.ac == cont; 2476 } 2477 2478 static void fc_rport_dev_release(struct device *dev) 2479 { 2480 struct fc_rport *rport = dev_to_rport(dev); 2481 put_device(dev->parent); 2482 kfree(rport); 2483 } 2484 2485 int scsi_is_fc_rport(const struct device *dev) 2486 { 2487 return dev->release == fc_rport_dev_release; 2488 } 2489 EXPORT_SYMBOL(scsi_is_fc_rport); 2490 2491 static int fc_rport_match(struct attribute_container *cont, 2492 struct device *dev) 2493 { 2494 struct Scsi_Host *shost; 2495 struct fc_internal *i; 2496 2497 if (!scsi_is_fc_rport(dev)) 2498 return 0; 2499 2500 shost = dev_to_shost(dev->parent); 2501 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2502 != &fc_host_class.class) 2503 return 0; 2504 2505 i = to_fc_internal(shost->transportt); 2506 2507 return &i->rport_attr_cont.ac == cont; 2508 } 2509 2510 2511 static void fc_vport_dev_release(struct device *dev) 2512 { 2513 struct fc_vport *vport = dev_to_vport(dev); 2514 put_device(dev->parent); /* release kobj parent */ 2515 kfree(vport); 2516 } 2517 2518 static int scsi_is_fc_vport(const struct device *dev) 2519 { 2520 return dev->release == fc_vport_dev_release; 2521 } 2522 2523 static int fc_vport_match(struct attribute_container *cont, 2524 struct device *dev) 2525 { 2526 struct fc_vport *vport; 2527 struct Scsi_Host *shost; 2528 struct fc_internal *i; 2529 2530 if (!scsi_is_fc_vport(dev)) 2531 return 0; 2532 vport = dev_to_vport(dev); 2533 2534 shost = vport_to_shost(vport); 2535 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2536 != &fc_host_class.class) 2537 return 0; 2538 2539 i = to_fc_internal(shost->transportt); 2540 return &i->vport_attr_cont.ac == cont; 2541 } 2542 2543 2544 /** 2545 * fc_eh_timed_out - FC Transport I/O timeout intercept handler 2546 * @scmd: The SCSI command which timed out 2547 * 2548 * This routine protects against error handlers getting invoked while a 2549 * rport is in a blocked state, typically due to a temporarily loss of 2550 * connectivity. If the error handlers are allowed to proceed, requests 2551 * to abort i/o, reset the target, etc will likely fail as there is no way 2552 * to communicate with the device to perform the requested function. These 2553 * failures may result in the midlayer taking the device offline, requiring 2554 * manual intervention to restore operation. 2555 * 2556 * This routine, called whenever an i/o times out, validates the state of 2557 * the underlying rport. If the rport is blocked, it returns 2558 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2559 * Eventually, either the device will return, or devloss_tmo will fire, 2560 * and when the timeout then fires, it will be handled normally. 2561 * If the rport is not blocked, normal error handling continues. 2562 * 2563 * Notes: 2564 * This routine assumes no locks are held on entry. 2565 */ 2566 enum scsi_timeout_action fc_eh_timed_out(struct scsi_cmnd *scmd) 2567 { 2568 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2569 2570 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2571 return SCSI_EH_RESET_TIMER; 2572 2573 return SCSI_EH_NOT_HANDLED; 2574 } 2575 EXPORT_SYMBOL(fc_eh_timed_out); 2576 2577 /* 2578 * Called by fc_user_scan to locate an rport on the shost that 2579 * matches the channel and target id, and invoke scsi_scan_target() 2580 * on the rport. 2581 */ 2582 static void 2583 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2584 { 2585 struct fc_rport *rport; 2586 unsigned long flags; 2587 2588 spin_lock_irqsave(shost->host_lock, flags); 2589 2590 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2591 if (rport->scsi_target_id == -1) 2592 continue; 2593 2594 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 2595 (rport->port_state != FC_PORTSTATE_MARGINAL)) 2596 continue; 2597 2598 if ((channel == rport->channel) && 2599 (id == rport->scsi_target_id)) { 2600 spin_unlock_irqrestore(shost->host_lock, flags); 2601 scsi_scan_target(&rport->dev, channel, id, lun, 2602 SCSI_SCAN_MANUAL); 2603 return; 2604 } 2605 } 2606 2607 spin_unlock_irqrestore(shost->host_lock, flags); 2608 } 2609 2610 /* 2611 * Called via sysfs scan routines. Necessary, as the FC transport 2612 * wants to place all target objects below the rport object. So this 2613 * routine must invoke the scsi_scan_target() routine with the rport 2614 * object as the parent. 2615 */ 2616 static int 2617 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2618 { 2619 uint chlo, chhi; 2620 uint tgtlo, tgthi; 2621 2622 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2623 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2624 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2625 return -EINVAL; 2626 2627 if (channel == SCAN_WILD_CARD) { 2628 chlo = 0; 2629 chhi = shost->max_channel + 1; 2630 } else { 2631 chlo = channel; 2632 chhi = channel + 1; 2633 } 2634 2635 if (id == SCAN_WILD_CARD) { 2636 tgtlo = 0; 2637 tgthi = shost->max_id; 2638 } else { 2639 tgtlo = id; 2640 tgthi = id + 1; 2641 } 2642 2643 for ( ; chlo < chhi; chlo++) 2644 for ( ; tgtlo < tgthi; tgtlo++) 2645 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2646 2647 return 0; 2648 } 2649 2650 struct scsi_transport_template * 2651 fc_attach_transport(struct fc_function_template *ft) 2652 { 2653 int count; 2654 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2655 GFP_KERNEL); 2656 2657 if (unlikely(!i)) 2658 return NULL; 2659 2660 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2661 i->t.target_attrs.ac.class = &fc_transport_class.class; 2662 i->t.target_attrs.ac.match = fc_target_match; 2663 i->t.target_size = sizeof(struct fc_starget_attrs); 2664 transport_container_register(&i->t.target_attrs); 2665 2666 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2667 i->t.host_attrs.ac.class = &fc_host_class.class; 2668 i->t.host_attrs.ac.match = fc_host_match; 2669 i->t.host_size = sizeof(struct fc_host_attrs); 2670 if (ft->get_fc_host_stats) 2671 i->t.host_attrs.statistics = &fc_statistics_group; 2672 transport_container_register(&i->t.host_attrs); 2673 2674 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2675 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2676 i->rport_attr_cont.ac.match = fc_rport_match; 2677 if (ft->get_fc_rport_enc_info) 2678 i->rport_attr_cont.encryption = &fc_rport_encryption_group; 2679 i->rport_attr_cont.statistics = &fc_rport_statistics_group; 2680 transport_container_register(&i->rport_attr_cont); 2681 2682 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2683 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2684 i->vport_attr_cont.ac.match = fc_vport_match; 2685 transport_container_register(&i->vport_attr_cont); 2686 2687 i->f = ft; 2688 2689 /* Transport uses the shost workq for scsi scanning */ 2690 i->t.create_work_queue = 1; 2691 2692 i->t.user_scan = fc_user_scan; 2693 2694 /* 2695 * Setup SCSI Target Attributes. 2696 */ 2697 count = 0; 2698 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2699 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2700 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2701 2702 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2703 2704 i->starget_attrs[count] = NULL; 2705 2706 2707 /* 2708 * Setup SCSI Host Attributes. 2709 */ 2710 count=0; 2711 SETUP_HOST_ATTRIBUTE_RD(node_name); 2712 SETUP_HOST_ATTRIBUTE_RD(port_name); 2713 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2714 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2715 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2716 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2717 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2718 if (ft->vport_create) { 2719 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2720 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2721 } 2722 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2723 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2724 SETUP_HOST_ATTRIBUTE_RD(model); 2725 SETUP_HOST_ATTRIBUTE_RD(model_description); 2726 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2727 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2728 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2729 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2730 2731 SETUP_HOST_ATTRIBUTE_RD(port_id); 2732 SETUP_HOST_ATTRIBUTE_RD(port_type); 2733 SETUP_HOST_ATTRIBUTE_RD(port_state); 2734 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2735 SETUP_HOST_ATTRIBUTE_RD(speed); 2736 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2737 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2738 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2739 2740 /* Transport-managed attributes */ 2741 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2742 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2743 if (ft->issue_fc_host_lip) 2744 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2745 if (ft->vport_create) 2746 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2747 if (ft->vport_delete) 2748 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2749 2750 BUG_ON(count > FC_HOST_NUM_ATTRS); 2751 2752 i->host_attrs[count] = NULL; 2753 2754 /* 2755 * Setup Remote Port Attributes. 2756 */ 2757 count=0; 2758 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2759 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2760 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2761 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2762 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2763 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2764 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2765 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(port_state); 2766 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2767 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2768 2769 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2770 2771 i->rport_attrs[count] = NULL; 2772 2773 /* 2774 * Setup Virtual Port Attributes. 2775 */ 2776 count=0; 2777 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2778 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2779 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2780 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2781 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2782 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2783 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2784 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2785 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2786 2787 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2788 2789 i->vport_attrs[count] = NULL; 2790 2791 return &i->t; 2792 } 2793 EXPORT_SYMBOL(fc_attach_transport); 2794 2795 void fc_release_transport(struct scsi_transport_template *t) 2796 { 2797 struct fc_internal *i = to_fc_internal(t); 2798 2799 transport_container_unregister(&i->t.target_attrs); 2800 transport_container_unregister(&i->t.host_attrs); 2801 transport_container_unregister(&i->rport_attr_cont); 2802 transport_container_unregister(&i->vport_attr_cont); 2803 2804 kfree(i); 2805 } 2806 EXPORT_SYMBOL(fc_release_transport); 2807 2808 /** 2809 * fc_queue_work - Queue work to the fc_host workqueue. 2810 * @shost: Pointer to Scsi_Host bound to fc_host. 2811 * @work: Work to queue for execution. 2812 * 2813 * Return value: 2814 * 1 - work queued for execution 2815 * 0 - work is already queued 2816 * -EINVAL - work queue doesn't exist 2817 */ 2818 static int 2819 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2820 { 2821 if (unlikely(!fc_host_work_q(shost))) { 2822 printk(KERN_ERR 2823 "ERROR: FC host '%s' attempted to queue work, " 2824 "when no workqueue created.\n", shost->hostt->name); 2825 dump_stack(); 2826 2827 return -EINVAL; 2828 } 2829 2830 return queue_work(fc_host_work_q(shost), work); 2831 } 2832 2833 /** 2834 * fc_flush_work - Flush a fc_host's workqueue. 2835 * @shost: Pointer to Scsi_Host bound to fc_host. 2836 */ 2837 static void 2838 fc_flush_work(struct Scsi_Host *shost) 2839 { 2840 if (!fc_host_work_q(shost)) { 2841 printk(KERN_ERR 2842 "ERROR: FC host '%s' attempted to flush work, " 2843 "when no workqueue created.\n", shost->hostt->name); 2844 dump_stack(); 2845 return; 2846 } 2847 2848 flush_workqueue(fc_host_work_q(shost)); 2849 } 2850 2851 /** 2852 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2853 * @shost: Pointer to Scsi_Host bound to fc_host. 2854 * @rport: rport associated with the devloss work 2855 * @work: Work to queue for execution. 2856 * @delay: jiffies to delay the work queuing 2857 * 2858 * Return value: 2859 * 1 on success / 0 already queued / < 0 for error 2860 */ 2861 static int 2862 fc_queue_devloss_work(struct Scsi_Host *shost, struct fc_rport *rport, 2863 struct delayed_work *work, unsigned long delay) 2864 { 2865 if (unlikely(!rport->devloss_work_q)) { 2866 printk(KERN_ERR 2867 "ERROR: FC host '%s' attempted to queue work, " 2868 "when no workqueue created.\n", shost->hostt->name); 2869 dump_stack(); 2870 2871 return -EINVAL; 2872 } 2873 2874 return queue_delayed_work(rport->devloss_work_q, work, delay); 2875 } 2876 2877 /** 2878 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2879 * @shost: Pointer to Scsi_Host bound to fc_host. 2880 * @rport: rport associated with the devloss work 2881 */ 2882 static void 2883 fc_flush_devloss(struct Scsi_Host *shost, struct fc_rport *rport) 2884 { 2885 if (unlikely(!rport->devloss_work_q)) { 2886 printk(KERN_ERR 2887 "ERROR: FC host '%s' attempted to flush work, " 2888 "when no workqueue created.\n", shost->hostt->name); 2889 dump_stack(); 2890 return; 2891 } 2892 2893 flush_workqueue(rport->devloss_work_q); 2894 } 2895 2896 2897 /** 2898 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2899 * @shost: Which &Scsi_Host 2900 * 2901 * This routine is expected to be called immediately preceding the 2902 * a driver's call to scsi_remove_host(). 2903 * 2904 * WARNING: A driver utilizing the fc_transport, which fails to call 2905 * this routine prior to scsi_remove_host(), will leave dangling 2906 * objects in /sys/class/fc_remote_ports. Access to any of these 2907 * objects can result in a system crash !!! 2908 * 2909 * Notes: 2910 * This routine assumes no locks are held on entry. 2911 */ 2912 void 2913 fc_remove_host(struct Scsi_Host *shost) 2914 { 2915 struct fc_vport *vport = NULL, *next_vport = NULL; 2916 struct fc_rport *rport = NULL, *next_rport = NULL; 2917 struct workqueue_struct *work_q; 2918 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2919 unsigned long flags; 2920 2921 spin_lock_irqsave(shost->host_lock, flags); 2922 2923 /* Remove any vports */ 2924 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2925 vport->flags |= FC_VPORT_DELETING; 2926 fc_queue_work(shost, &vport->vport_delete_work); 2927 } 2928 2929 /* Remove any remote ports */ 2930 list_for_each_entry_safe(rport, next_rport, 2931 &fc_host->rports, peers) { 2932 list_del(&rport->peers); 2933 rport->port_state = FC_PORTSTATE_DELETED; 2934 fc_queue_work(shost, &rport->rport_delete_work); 2935 } 2936 2937 list_for_each_entry_safe(rport, next_rport, 2938 &fc_host->rport_bindings, peers) { 2939 list_del(&rport->peers); 2940 rport->port_state = FC_PORTSTATE_DELETED; 2941 fc_queue_work(shost, &rport->rport_delete_work); 2942 } 2943 2944 spin_unlock_irqrestore(shost->host_lock, flags); 2945 2946 /* flush all scan work items */ 2947 scsi_flush_work(shost); 2948 2949 /* flush all stgt delete, and rport delete work items, then kill it */ 2950 if (fc_host->work_q) { 2951 work_q = fc_host->work_q; 2952 fc_host->work_q = NULL; 2953 destroy_workqueue(work_q); 2954 } 2955 } 2956 EXPORT_SYMBOL(fc_remove_host); 2957 2958 static void fc_terminate_rport_io(struct fc_rport *rport) 2959 { 2960 struct Scsi_Host *shost = rport_to_shost(rport); 2961 struct fc_internal *i = to_fc_internal(shost->transportt); 2962 2963 /* Involve the LLDD if possible to terminate all io on the rport. */ 2964 if (i->f->terminate_rport_io) 2965 i->f->terminate_rport_io(rport); 2966 2967 /* 2968 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2969 */ 2970 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2971 } 2972 2973 /** 2974 * fc_starget_delete - called to delete the scsi descendants of an rport 2975 * @work: remote port to be operated on. 2976 * 2977 * Deletes target and all sdevs. 2978 */ 2979 static void 2980 fc_starget_delete(struct work_struct *work) 2981 { 2982 struct fc_rport *rport = 2983 container_of(work, struct fc_rport, stgt_delete_work); 2984 2985 fc_terminate_rport_io(rport); 2986 scsi_remove_target(&rport->dev); 2987 } 2988 2989 2990 /** 2991 * fc_rport_final_delete - finish rport termination and delete it. 2992 * @work: remote port to be deleted. 2993 */ 2994 static void 2995 fc_rport_final_delete(struct work_struct *work) 2996 { 2997 struct fc_rport *rport = 2998 container_of(work, struct fc_rport, rport_delete_work); 2999 struct device *dev = &rport->dev; 3000 struct Scsi_Host *shost = rport_to_shost(rport); 3001 struct fc_internal *i = to_fc_internal(shost->transportt); 3002 struct workqueue_struct *work_q; 3003 unsigned long flags; 3004 int do_callback = 0; 3005 3006 fc_terminate_rport_io(rport); 3007 3008 /* 3009 * if a scan is pending, flush the SCSI Host work_q so that 3010 * that we can reclaim the rport scan work element. 3011 */ 3012 if (rport->flags & FC_RPORT_SCAN_PENDING) 3013 scsi_flush_work(shost); 3014 3015 /* 3016 * Cancel any outstanding timers. These should really exist 3017 * only when rmmod'ing the LLDD and we're asking for 3018 * immediate termination of the rports 3019 */ 3020 spin_lock_irqsave(shost->host_lock, flags); 3021 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 3022 spin_unlock_irqrestore(shost->host_lock, flags); 3023 if (!cancel_delayed_work(&rport->fail_io_work)) 3024 fc_flush_devloss(shost, rport); 3025 if (!cancel_delayed_work(&rport->dev_loss_work)) 3026 fc_flush_devloss(shost, rport); 3027 cancel_work_sync(&rport->scan_work); 3028 spin_lock_irqsave(shost->host_lock, flags); 3029 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3030 } 3031 spin_unlock_irqrestore(shost->host_lock, flags); 3032 3033 /* Delete SCSI target and sdevs */ 3034 if (rport->scsi_target_id != -1) 3035 fc_starget_delete(&rport->stgt_delete_work); 3036 3037 /* 3038 * Notify the driver that the rport is now dead. The LLDD will 3039 * also guarantee that any communication to the rport is terminated 3040 * 3041 * Avoid this call if we already called it when we preserved the 3042 * rport for the binding. 3043 */ 3044 spin_lock_irqsave(shost->host_lock, flags); 3045 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 3046 (i->f->dev_loss_tmo_callbk)) { 3047 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3048 do_callback = 1; 3049 } 3050 spin_unlock_irqrestore(shost->host_lock, flags); 3051 3052 if (do_callback) 3053 i->f->dev_loss_tmo_callbk(rport); 3054 3055 fc_bsg_remove(rport->rqst_q); 3056 3057 if (rport->devloss_work_q) { 3058 work_q = rport->devloss_work_q; 3059 rport->devloss_work_q = NULL; 3060 destroy_workqueue(work_q); 3061 } 3062 3063 transport_remove_device(dev); 3064 device_del(dev); 3065 transport_destroy_device(dev); 3066 scsi_host_put(shost); /* for fc_host->rport list */ 3067 put_device(dev); /* for self-reference */ 3068 } 3069 3070 3071 /** 3072 * fc_remote_port_create - allocates and creates a remote FC port. 3073 * @shost: scsi host the remote port is connected to. 3074 * @channel: Channel on shost port connected to. 3075 * @ids: The world wide names, fc address, and FC4 port 3076 * roles for the remote port. 3077 * 3078 * Allocates and creates the remoter port structure, including the 3079 * class and sysfs creation. 3080 * 3081 * Notes: 3082 * This routine assumes no locks are held on entry. 3083 */ 3084 static struct fc_rport * 3085 fc_remote_port_create(struct Scsi_Host *shost, int channel, 3086 struct fc_rport_identifiers *ids) 3087 { 3088 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3089 struct fc_internal *fci = to_fc_internal(shost->transportt); 3090 struct fc_rport *rport; 3091 struct device *dev; 3092 unsigned long flags; 3093 int error; 3094 size_t size; 3095 3096 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 3097 rport = kzalloc(size, GFP_KERNEL); 3098 if (unlikely(!rport)) { 3099 printk(KERN_ERR "%s: allocation failure\n", __func__); 3100 return NULL; 3101 } 3102 3103 rport->maxframe_size = -1; 3104 rport->supported_classes = FC_COS_UNSPECIFIED; 3105 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 3106 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 3107 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 3108 rport->port_id = ids->port_id; 3109 rport->roles = ids->roles; 3110 rport->port_state = FC_PORTSTATE_ONLINE; 3111 if (fci->f->dd_fcrport_size) 3112 rport->dd_data = &rport[1]; 3113 rport->channel = channel; 3114 rport->fast_io_fail_tmo = -1; 3115 3116 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 3117 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 3118 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 3119 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 3120 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 3121 3122 spin_lock_irqsave(shost->host_lock, flags); 3123 3124 rport->number = fc_host->next_rport_number++; 3125 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) || 3126 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) 3127 rport->scsi_target_id = fc_host->next_target_id++; 3128 else 3129 rport->scsi_target_id = -1; 3130 list_add_tail(&rport->peers, &fc_host->rports); 3131 scsi_host_get(shost); /* for fc_host->rport list */ 3132 3133 spin_unlock_irqrestore(shost->host_lock, flags); 3134 3135 rport->devloss_work_q = alloc_workqueue("fc_dl_%d_%d", WQ_PERCPU, 0, 3136 shost->host_no, rport->number); 3137 if (!rport->devloss_work_q) { 3138 printk(KERN_ERR "FC Remote Port alloc_workqueue failed\n"); 3139 /* 3140 * Note that we have not yet called device_initialize() / get_device() 3141 * Cannot reclaim incremented rport->number because we released host_lock 3142 */ 3143 spin_lock_irqsave(shost->host_lock, flags); 3144 list_del(&rport->peers); 3145 scsi_host_put(shost); /* for fc_host->rport list */ 3146 spin_unlock_irqrestore(shost->host_lock, flags); 3147 kfree(rport); 3148 return NULL; 3149 } 3150 3151 dev = &rport->dev; 3152 device_initialize(dev); /* takes self reference */ 3153 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 3154 dev->release = fc_rport_dev_release; 3155 dev_set_name(dev, "rport-%d:%d-%d", 3156 shost->host_no, channel, rport->number); 3157 transport_setup_device(dev); 3158 3159 error = device_add(dev); 3160 if (error) { 3161 printk(KERN_ERR "FC Remote Port device_add failed\n"); 3162 goto delete_rport; 3163 } 3164 transport_add_device(dev); 3165 transport_configure_device(dev); 3166 3167 fc_bsg_rportadd(shost, rport); 3168 /* ignore any bsg add error - we just can't do sgio */ 3169 3170 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 3171 /* initiate a scan of the target */ 3172 rport->flags |= FC_RPORT_SCAN_PENDING; 3173 scsi_queue_work(shost, &rport->scan_work); 3174 } 3175 3176 return rport; 3177 3178 delete_rport: 3179 transport_destroy_device(dev); 3180 spin_lock_irqsave(shost->host_lock, flags); 3181 list_del(&rport->peers); 3182 scsi_host_put(shost); /* for fc_host->rport list */ 3183 spin_unlock_irqrestore(shost->host_lock, flags); 3184 put_device(dev->parent); 3185 kfree(rport); 3186 return NULL; 3187 } 3188 3189 /** 3190 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 3191 * @shost: scsi host the remote port is connected to. 3192 * @channel: Channel on shost port connected to. 3193 * @ids: The world wide names, fc address, and FC4 port 3194 * roles for the remote port. 3195 * 3196 * The LLDD calls this routine to notify the transport of the existence 3197 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 3198 * of the port, it's FC address (port_id), and the FC4 roles that are 3199 * active for the port. 3200 * 3201 * For ports that are FCP targets (aka scsi targets), the FC transport 3202 * maintains consistent target id bindings on behalf of the LLDD. 3203 * A consistent target id binding is an assignment of a target id to 3204 * a remote port identifier, which persists while the scsi host is 3205 * attached. The remote port can disappear, then later reappear, and 3206 * it's target id assignment remains the same. This allows for shifts 3207 * in FC addressing (if binding by wwpn or wwnn) with no apparent 3208 * changes to the scsi subsystem which is based on scsi host number and 3209 * target id values. Bindings are only valid during the attachment of 3210 * the scsi host. If the host detaches, then later re-attaches, target 3211 * id bindings may change. 3212 * 3213 * This routine is responsible for returning a remote port structure. 3214 * The routine will search the list of remote ports it maintains 3215 * internally on behalf of consistent target id mappings. If found, the 3216 * remote port structure will be reused. Otherwise, a new remote port 3217 * structure will be allocated. 3218 * 3219 * Whenever a remote port is allocated, a new fc_remote_port class 3220 * device is created. 3221 * 3222 * Should not be called from interrupt context. 3223 * 3224 * Notes: 3225 * This routine assumes no locks are held on entry. 3226 */ 3227 struct fc_rport * 3228 fc_remote_port_add(struct Scsi_Host *shost, int channel, 3229 struct fc_rport_identifiers *ids) 3230 { 3231 struct fc_internal *fci = to_fc_internal(shost->transportt); 3232 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3233 struct fc_rport *rport; 3234 unsigned long flags; 3235 int match = 0; 3236 3237 /* ensure any stgt delete functions are done */ 3238 fc_flush_work(shost); 3239 3240 /* 3241 * Search the list of "active" rports, for an rport that has been 3242 * deleted, but we've held off the real delete while the target 3243 * is in a "blocked" state. 3244 */ 3245 spin_lock_irqsave(shost->host_lock, flags); 3246 3247 list_for_each_entry(rport, &fc_host->rports, peers) { 3248 3249 if ((rport->port_state == FC_PORTSTATE_BLOCKED || 3250 rport->port_state == FC_PORTSTATE_NOTPRESENT) && 3251 (rport->channel == channel)) { 3252 3253 switch (fc_host->tgtid_bind_type) { 3254 case FC_TGTID_BIND_BY_WWPN: 3255 case FC_TGTID_BIND_NONE: 3256 if (rport->port_name == ids->port_name) 3257 match = 1; 3258 break; 3259 case FC_TGTID_BIND_BY_WWNN: 3260 if (rport->node_name == ids->node_name) 3261 match = 1; 3262 break; 3263 case FC_TGTID_BIND_BY_ID: 3264 if (rport->port_id == ids->port_id) 3265 match = 1; 3266 break; 3267 } 3268 3269 if (match) { 3270 3271 memcpy(&rport->node_name, &ids->node_name, 3272 sizeof(rport->node_name)); 3273 memcpy(&rport->port_name, &ids->port_name, 3274 sizeof(rport->port_name)); 3275 rport->port_id = ids->port_id; 3276 3277 rport->port_state = FC_PORTSTATE_ONLINE; 3278 rport->roles = ids->roles; 3279 3280 spin_unlock_irqrestore(shost->host_lock, flags); 3281 3282 if (fci->f->dd_fcrport_size) 3283 memset(rport->dd_data, 0, 3284 fci->f->dd_fcrport_size); 3285 3286 /* 3287 * If we were not a target, cancel the 3288 * io terminate and rport timers, and 3289 * we're done. 3290 * 3291 * If we were a target, but our new role 3292 * doesn't indicate a target, leave the 3293 * timers running expecting the role to 3294 * change as the target fully logs in. If 3295 * it doesn't, the target will be torn down. 3296 * 3297 * If we were a target, and our role shows 3298 * we're still a target, cancel the timers 3299 * and kick off a scan. 3300 */ 3301 3302 /* was a target, not in roles */ 3303 if ((rport->scsi_target_id != -1) && 3304 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 3305 return rport; 3306 3307 /* 3308 * Stop the fail io and dev_loss timers. 3309 * If they flush, the port_state will 3310 * be checked and will NOOP the function. 3311 */ 3312 if (!cancel_delayed_work(&rport->fail_io_work)) 3313 fc_flush_devloss(shost, rport); 3314 if (!cancel_delayed_work(&rport->dev_loss_work)) 3315 fc_flush_devloss(shost, rport); 3316 3317 spin_lock_irqsave(shost->host_lock, flags); 3318 3319 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3320 FC_RPORT_DEVLOSS_PENDING | 3321 FC_RPORT_DEVLOSS_CALLBK_DONE); 3322 3323 spin_unlock_irqrestore(shost->host_lock, flags); 3324 3325 /* if target, initiate a scan */ 3326 if (rport->scsi_target_id != -1) { 3327 scsi_target_unblock(&rport->dev, 3328 SDEV_RUNNING); 3329 spin_lock_irqsave(shost->host_lock, 3330 flags); 3331 rport->flags |= FC_RPORT_SCAN_PENDING; 3332 scsi_queue_work(shost, 3333 &rport->scan_work); 3334 spin_unlock_irqrestore(shost->host_lock, 3335 flags); 3336 } 3337 3338 fc_bsg_goose_queue(rport); 3339 3340 return rport; 3341 } 3342 } 3343 } 3344 3345 /* 3346 * Search the bindings array 3347 * Note: if never a FCP target, you won't be on this list 3348 */ 3349 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 3350 3351 /* search for a matching consistent binding */ 3352 3353 list_for_each_entry(rport, &fc_host->rport_bindings, 3354 peers) { 3355 if (rport->channel != channel) 3356 continue; 3357 3358 switch (fc_host->tgtid_bind_type) { 3359 case FC_TGTID_BIND_BY_WWPN: 3360 if (rport->port_name == ids->port_name) 3361 match = 1; 3362 break; 3363 case FC_TGTID_BIND_BY_WWNN: 3364 if (rport->node_name == ids->node_name) 3365 match = 1; 3366 break; 3367 case FC_TGTID_BIND_BY_ID: 3368 if (rport->port_id == ids->port_id) 3369 match = 1; 3370 break; 3371 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3372 break; 3373 } 3374 3375 if (match) { 3376 list_move_tail(&rport->peers, &fc_host->rports); 3377 break; 3378 } 3379 } 3380 3381 if (match) { 3382 memcpy(&rport->node_name, &ids->node_name, 3383 sizeof(rport->node_name)); 3384 memcpy(&rport->port_name, &ids->port_name, 3385 sizeof(rport->port_name)); 3386 rport->port_id = ids->port_id; 3387 rport->port_state = FC_PORTSTATE_ONLINE; 3388 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3389 3390 if (fci->f->dd_fcrport_size) 3391 memset(rport->dd_data, 0, 3392 fci->f->dd_fcrport_size); 3393 spin_unlock_irqrestore(shost->host_lock, flags); 3394 3395 fc_remote_port_rolechg(rport, ids->roles); 3396 return rport; 3397 } 3398 } 3399 3400 spin_unlock_irqrestore(shost->host_lock, flags); 3401 3402 /* No consistent binding found - create new remote port entry */ 3403 rport = fc_remote_port_create(shost, channel, ids); 3404 3405 return rport; 3406 } 3407 EXPORT_SYMBOL(fc_remote_port_add); 3408 3409 3410 /** 3411 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 3412 * @rport: The remote port that no longer exists 3413 * 3414 * The LLDD calls this routine to notify the transport that a remote 3415 * port is no longer part of the topology. Note: Although a port 3416 * may no longer be part of the topology, it may persist in the remote 3417 * ports displayed by the fc_host. We do this under 2 conditions: 3418 * 3419 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 3420 * This allows the port to temporarily disappear, then reappear without 3421 * disrupting the SCSI device tree attached to it. During the "blocked" 3422 * period the port will still exist. 3423 * 3424 * 2) If the port was a scsi target and disappears for longer than we 3425 * expect, we'll delete the port and the tear down the SCSI device tree 3426 * attached to it. However, we want to semi-persist the target id assigned 3427 * to that port if it eventually does exist. The port structure will 3428 * remain (although with minimal information) so that the target id 3429 * bindings also remain. 3430 * 3431 * If the remote port is not an FCP Target, it will be fully torn down 3432 * and deallocated, including the fc_remote_port class device. 3433 * 3434 * If the remote port is an FCP Target, the port will be placed in a 3435 * temporary blocked state. From the LLDD's perspective, the rport no 3436 * longer exists. From the SCSI midlayer's perspective, the SCSI target 3437 * exists, but all sdevs on it are blocked from further I/O. The following 3438 * is then expected. 3439 * 3440 * If the remote port does not return (signaled by a LLDD call to 3441 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 3442 * scsi target is removed - killing all outstanding i/o and removing the 3443 * scsi devices attached to it. The port structure will be marked Not 3444 * Present and be partially cleared, leaving only enough information to 3445 * recognize the remote port relative to the scsi target id binding if 3446 * it later appears. The port will remain as long as there is a valid 3447 * binding (e.g. until the user changes the binding type or unloads the 3448 * scsi host with the binding). 3449 * 3450 * If the remote port returns within the dev_loss_tmo value (and matches 3451 * according to the target id binding type), the port structure will be 3452 * reused. If it is no longer a SCSI target, the target will be torn 3453 * down. If it continues to be a SCSI target, then the target will be 3454 * unblocked (allowing i/o to be resumed), and a scan will be activated 3455 * to ensure that all luns are detected. 3456 * 3457 * Called from normal process context only - cannot be called from interrupt. 3458 * 3459 * Notes: 3460 * This routine assumes no locks are held on entry. 3461 */ 3462 void 3463 fc_remote_port_delete(struct fc_rport *rport) 3464 { 3465 struct Scsi_Host *shost = rport_to_shost(rport); 3466 unsigned long timeout = rport->dev_loss_tmo; 3467 unsigned long flags; 3468 3469 /* 3470 * No need to flush the fc_host work_q's, as all adds are synchronous. 3471 * 3472 * We do need to reclaim the rport scan work element, so eventually 3473 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 3474 * there's still a scan pending. 3475 */ 3476 3477 spin_lock_irqsave(shost->host_lock, flags); 3478 3479 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3480 (rport->port_state != FC_PORTSTATE_MARGINAL)) { 3481 spin_unlock_irqrestore(shost->host_lock, flags); 3482 return; 3483 } 3484 3485 /* 3486 * In the past, we if this was not an FCP-Target, we would 3487 * unconditionally just jump to deleting the rport. 3488 * However, rports can be used as node containers by the LLDD, 3489 * and its not appropriate to just terminate the rport at the 3490 * first sign of a loss in connectivity. The LLDD may want to 3491 * send ELS traffic to re-validate the login. If the rport is 3492 * immediately deleted, it makes it inappropriate for a node 3493 * container. 3494 * So... we now unconditionally wait dev_loss_tmo before 3495 * destroying an rport. 3496 */ 3497 3498 rport->port_state = FC_PORTSTATE_BLOCKED; 3499 3500 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3501 3502 spin_unlock_irqrestore(shost->host_lock, flags); 3503 3504 scsi_block_targets(shost, &rport->dev); 3505 3506 /* see if we need to kill io faster than waiting for device loss */ 3507 if ((rport->fast_io_fail_tmo != -1) && 3508 (rport->fast_io_fail_tmo < timeout)) 3509 fc_queue_devloss_work(shost, rport, &rport->fail_io_work, 3510 rport->fast_io_fail_tmo * HZ); 3511 3512 /* cap the length the devices can be blocked until they are deleted */ 3513 fc_queue_devloss_work(shost, rport, &rport->dev_loss_work, 3514 timeout * HZ); 3515 } 3516 EXPORT_SYMBOL(fc_remote_port_delete); 3517 3518 /** 3519 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3520 * @rport: The remote port that changed. 3521 * @roles: New roles for this port. 3522 * 3523 * Description: The LLDD calls this routine to notify the transport that the 3524 * roles on a remote port may have changed. The largest effect of this is 3525 * if a port now becomes a FCP Target, it must be allocated a 3526 * scsi target id. If the port is no longer a FCP target, any 3527 * scsi target id value assigned to it will persist in case the 3528 * role changes back to include FCP Target. No changes in the scsi 3529 * midlayer will be invoked if the role changes (in the expectation 3530 * that the role will be resumed. If it doesn't normal error processing 3531 * will take place). 3532 * 3533 * Should not be called from interrupt context. 3534 * 3535 * Notes: 3536 * This routine assumes no locks are held on entry. 3537 */ 3538 void 3539 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3540 { 3541 struct Scsi_Host *shost = rport_to_shost(rport); 3542 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3543 unsigned long flags; 3544 int create = 0; 3545 3546 spin_lock_irqsave(shost->host_lock, flags); 3547 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3548 if (rport->scsi_target_id == -1) { 3549 rport->scsi_target_id = fc_host->next_target_id++; 3550 create = 1; 3551 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3552 create = 1; 3553 } 3554 3555 rport->roles = roles; 3556 3557 spin_unlock_irqrestore(shost->host_lock, flags); 3558 3559 if (create) { 3560 /* 3561 * There may have been a delete timer running on the 3562 * port. Ensure that it is cancelled as we now know 3563 * the port is an FCP Target. 3564 * Note: we know the rport exists and is in an online 3565 * state as the LLDD would not have had an rport 3566 * reference to pass us. 3567 * 3568 * Take no action on the timer_delete() failure as the state 3569 * machine state change will validate the 3570 * transaction. 3571 */ 3572 if (!cancel_delayed_work(&rport->fail_io_work)) 3573 fc_flush_devloss(shost, rport); 3574 if (!cancel_delayed_work(&rport->dev_loss_work)) 3575 fc_flush_devloss(shost, rport); 3576 3577 spin_lock_irqsave(shost->host_lock, flags); 3578 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3579 FC_RPORT_DEVLOSS_PENDING | 3580 FC_RPORT_DEVLOSS_CALLBK_DONE); 3581 spin_unlock_irqrestore(shost->host_lock, flags); 3582 3583 /* ensure any stgt delete functions are done */ 3584 fc_flush_work(shost); 3585 3586 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3587 /* initiate a scan of the target */ 3588 spin_lock_irqsave(shost->host_lock, flags); 3589 rport->flags |= FC_RPORT_SCAN_PENDING; 3590 scsi_queue_work(shost, &rport->scan_work); 3591 spin_unlock_irqrestore(shost->host_lock, flags); 3592 } 3593 } 3594 EXPORT_SYMBOL(fc_remote_port_rolechg); 3595 3596 /** 3597 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3598 * @work: rport target that failed to reappear in the allotted time. 3599 * 3600 * Description: An attempt to delete a remote port blocks, and if it fails 3601 * to return in the allotted time this gets called. 3602 */ 3603 static void 3604 fc_timeout_deleted_rport(struct work_struct *work) 3605 { 3606 struct fc_rport *rport = 3607 container_of(work, struct fc_rport, dev_loss_work.work); 3608 struct Scsi_Host *shost = rport_to_shost(rport); 3609 struct fc_internal *i = to_fc_internal(shost->transportt); 3610 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3611 unsigned long flags; 3612 int do_callback = 0; 3613 3614 spin_lock_irqsave(shost->host_lock, flags); 3615 3616 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3617 3618 /* 3619 * If the port is ONLINE, then it came back. If it was a SCSI 3620 * target, validate it still is. If not, tear down the 3621 * scsi_target on it. 3622 */ 3623 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3624 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3625 (rport->scsi_target_id != -1) && 3626 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3627 dev_printk(KERN_ERR, &rport->dev, 3628 "blocked FC remote port time out: no longer" 3629 " a FCP target, removing starget\n"); 3630 spin_unlock_irqrestore(shost->host_lock, flags); 3631 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3632 fc_queue_work(shost, &rport->stgt_delete_work); 3633 return; 3634 } 3635 3636 /* NOOP state - we're flushing workq's */ 3637 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3638 spin_unlock_irqrestore(shost->host_lock, flags); 3639 dev_printk(KERN_ERR, &rport->dev, 3640 "blocked FC remote port time out: leaving" 3641 " rport%s alone\n", 3642 (rport->scsi_target_id != -1) ? " and starget" : ""); 3643 return; 3644 } 3645 3646 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3647 (rport->scsi_target_id == -1)) { 3648 list_del(&rport->peers); 3649 rport->port_state = FC_PORTSTATE_DELETED; 3650 dev_printk(KERN_ERR, &rport->dev, 3651 "blocked FC remote port time out: removing" 3652 " rport%s\n", 3653 (rport->scsi_target_id != -1) ? " and starget" : ""); 3654 fc_queue_work(shost, &rport->rport_delete_work); 3655 spin_unlock_irqrestore(shost->host_lock, flags); 3656 return; 3657 } 3658 3659 dev_printk(KERN_ERR, &rport->dev, 3660 "blocked FC remote port time out: removing target and " 3661 "saving binding\n"); 3662 3663 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3664 3665 /* 3666 * Note: We do not remove or clear the hostdata area. This allows 3667 * host-specific target data to persist along with the 3668 * scsi_target_id. It's up to the host to manage it's hostdata area. 3669 */ 3670 3671 /* 3672 * Reinitialize port attributes that may change if the port comes back. 3673 */ 3674 rport->maxframe_size = -1; 3675 rport->supported_classes = FC_COS_UNSPECIFIED; 3676 rport->roles = FC_PORT_ROLE_UNKNOWN; 3677 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3678 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3679 3680 /* 3681 * Pre-emptively kill I/O rather than waiting for the work queue 3682 * item to teardown the starget. (FCOE libFC folks prefer this 3683 * and to have the rport_port_id still set when it's done). 3684 */ 3685 spin_unlock_irqrestore(shost->host_lock, flags); 3686 fc_terminate_rport_io(rport); 3687 3688 spin_lock_irqsave(shost->host_lock, flags); 3689 3690 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3691 3692 /* remove the identifiers that aren't used in the consisting binding */ 3693 switch (fc_host->tgtid_bind_type) { 3694 case FC_TGTID_BIND_BY_WWPN: 3695 rport->node_name = -1; 3696 rport->port_id = -1; 3697 break; 3698 case FC_TGTID_BIND_BY_WWNN: 3699 rport->port_name = -1; 3700 rport->port_id = -1; 3701 break; 3702 case FC_TGTID_BIND_BY_ID: 3703 rport->node_name = -1; 3704 rport->port_name = -1; 3705 break; 3706 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3707 break; 3708 } 3709 3710 /* 3711 * As this only occurs if the remote port (scsi target) 3712 * went away and didn't come back - we'll remove 3713 * all attached scsi devices. 3714 */ 3715 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3716 fc_queue_work(shost, &rport->stgt_delete_work); 3717 3718 do_callback = 1; 3719 } 3720 3721 spin_unlock_irqrestore(shost->host_lock, flags); 3722 3723 /* 3724 * Notify the driver that the rport is now dead. The LLDD will 3725 * also guarantee that any communication to the rport is terminated 3726 * 3727 * Note: we set the CALLBK_DONE flag above to correspond 3728 */ 3729 if (do_callback && i->f->dev_loss_tmo_callbk) 3730 i->f->dev_loss_tmo_callbk(rport); 3731 } 3732 3733 3734 /** 3735 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3736 * @work: rport to terminate io on. 3737 * 3738 * Notes: Only requests the failure of the io, not that all are flushed 3739 * prior to returning. 3740 */ 3741 static void 3742 fc_timeout_fail_rport_io(struct work_struct *work) 3743 { 3744 struct fc_rport *rport = 3745 container_of(work, struct fc_rport, fail_io_work.work); 3746 3747 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3748 return; 3749 3750 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3751 fc_terminate_rport_io(rport); 3752 } 3753 3754 /** 3755 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3756 * @work: remote port to be scanned. 3757 */ 3758 static void 3759 fc_scsi_scan_rport(struct work_struct *work) 3760 { 3761 struct fc_rport *rport = 3762 container_of(work, struct fc_rport, scan_work); 3763 struct Scsi_Host *shost = rport_to_shost(rport); 3764 struct fc_internal *i = to_fc_internal(shost->transportt); 3765 unsigned long flags; 3766 3767 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3768 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3769 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3770 !(i->f->disable_target_scan)) { 3771 scsi_scan_target(&rport->dev, rport->channel, 3772 rport->scsi_target_id, SCAN_WILD_CARD, 3773 SCSI_SCAN_RESCAN); 3774 } 3775 3776 spin_lock_irqsave(shost->host_lock, flags); 3777 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3778 spin_unlock_irqrestore(shost->host_lock, flags); 3779 } 3780 3781 /** 3782 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport. 3783 * @rport: Remote port that scsi_eh is trying to recover. 3784 * 3785 * This routine can be called from a FC LLD scsi_eh callback. It 3786 * blocks the scsi_eh thread until the fc_rport leaves the 3787 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3788 * necessary to avoid the scsi_eh failing recovery actions for blocked 3789 * rports which would lead to offlined SCSI devices. 3790 * 3791 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3792 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3793 * passed back to scsi_eh. 3794 */ 3795 int fc_block_rport(struct fc_rport *rport) 3796 { 3797 struct Scsi_Host *shost = rport_to_shost(rport); 3798 unsigned long flags; 3799 3800 spin_lock_irqsave(shost->host_lock, flags); 3801 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3802 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3803 spin_unlock_irqrestore(shost->host_lock, flags); 3804 msleep(1000); 3805 spin_lock_irqsave(shost->host_lock, flags); 3806 } 3807 spin_unlock_irqrestore(shost->host_lock, flags); 3808 3809 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3810 return FAST_IO_FAIL; 3811 3812 return 0; 3813 } 3814 EXPORT_SYMBOL(fc_block_rport); 3815 3816 /** 3817 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3818 * @cmnd: SCSI command that scsi_eh is trying to recover 3819 * 3820 * This routine can be called from a FC LLD scsi_eh callback. It 3821 * blocks the scsi_eh thread until the fc_rport leaves the 3822 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3823 * necessary to avoid the scsi_eh failing recovery actions for blocked 3824 * rports which would lead to offlined SCSI devices. 3825 * 3826 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3827 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3828 * passed back to scsi_eh. 3829 */ 3830 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3831 { 3832 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3833 3834 if (WARN_ON_ONCE(!rport)) 3835 return FAST_IO_FAIL; 3836 3837 return fc_block_rport(rport); 3838 } 3839 EXPORT_SYMBOL(fc_block_scsi_eh); 3840 3841 /* 3842 * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not 3843 * @scmd: The SCSI command to be checked 3844 * 3845 * This checks the rport state to decide if a cmd is 3846 * retryable. 3847 * 3848 * Returns: true if the rport state is not in marginal state. 3849 */ 3850 bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd) 3851 { 3852 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 3853 3854 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3855 (scsi_cmd_to_rq(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT)) { 3856 set_host_byte(scmd, DID_TRANSPORT_MARGINAL); 3857 return false; 3858 } 3859 return true; 3860 } 3861 EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd); 3862 3863 /** 3864 * fc_vport_setup - allocates and creates a FC virtual port. 3865 * @shost: scsi host the virtual port is connected to. 3866 * @channel: Channel on shost port connected to. 3867 * @pdev: parent device for vport 3868 * @ids: The world wide names, FC4 port roles, etc for 3869 * the virtual port. 3870 * @ret_vport: The pointer to the created vport. 3871 * 3872 * Allocates and creates the vport structure, calls the parent host 3873 * to instantiate the vport, this completes w/ class and sysfs creation. 3874 * 3875 * Notes: 3876 * This routine assumes no locks are held on entry. 3877 */ 3878 static int 3879 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3880 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3881 { 3882 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3883 struct fc_internal *fci = to_fc_internal(shost->transportt); 3884 struct fc_vport *vport; 3885 struct device *dev; 3886 unsigned long flags; 3887 size_t size; 3888 int error; 3889 3890 *ret_vport = NULL; 3891 3892 if ( ! fci->f->vport_create) 3893 return -ENOENT; 3894 3895 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3896 vport = kzalloc(size, GFP_KERNEL); 3897 if (unlikely(!vport)) { 3898 printk(KERN_ERR "%s: allocation failure\n", __func__); 3899 return -ENOMEM; 3900 } 3901 3902 vport->vport_state = FC_VPORT_UNKNOWN; 3903 vport->vport_last_state = FC_VPORT_UNKNOWN; 3904 vport->node_name = ids->node_name; 3905 vport->port_name = ids->port_name; 3906 vport->roles = ids->roles; 3907 vport->vport_type = ids->vport_type; 3908 if (fci->f->dd_fcvport_size) 3909 vport->dd_data = &vport[1]; 3910 vport->shost = shost; 3911 vport->channel = channel; 3912 vport->flags = FC_VPORT_CREATING; 3913 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3914 3915 spin_lock_irqsave(shost->host_lock, flags); 3916 3917 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3918 spin_unlock_irqrestore(shost->host_lock, flags); 3919 kfree(vport); 3920 return -ENOSPC; 3921 } 3922 fc_host->npiv_vports_inuse++; 3923 vport->number = fc_host->next_vport_number++; 3924 list_add_tail(&vport->peers, &fc_host->vports); 3925 scsi_host_get(shost); /* for fc_host->vport list */ 3926 3927 spin_unlock_irqrestore(shost->host_lock, flags); 3928 3929 dev = &vport->dev; 3930 device_initialize(dev); /* takes self reference */ 3931 dev->parent = get_device(pdev); /* takes parent reference */ 3932 dev->release = fc_vport_dev_release; 3933 dev_set_name(dev, "vport-%d:%d-%d", 3934 shost->host_no, channel, vport->number); 3935 transport_setup_device(dev); 3936 3937 error = device_add(dev); 3938 if (error) { 3939 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3940 goto delete_vport; 3941 } 3942 transport_add_device(dev); 3943 transport_configure_device(dev); 3944 3945 error = fci->f->vport_create(vport, ids->disable); 3946 if (error) { 3947 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3948 goto delete_vport_all; 3949 } 3950 3951 /* 3952 * if the parent isn't the physical adapter's Scsi_Host, ensure 3953 * the Scsi_Host at least contains a symlink to the vport. 3954 */ 3955 if (pdev != &shost->shost_gendev) { 3956 error = sysfs_create_link(&shost->shost_gendev.kobj, 3957 &dev->kobj, dev_name(dev)); 3958 if (error) 3959 printk(KERN_ERR 3960 "%s: Cannot create vport symlinks for " 3961 "%s, err=%d\n", 3962 __func__, dev_name(dev), error); 3963 } 3964 spin_lock_irqsave(shost->host_lock, flags); 3965 vport->flags &= ~FC_VPORT_CREATING; 3966 spin_unlock_irqrestore(shost->host_lock, flags); 3967 3968 dev_printk(KERN_NOTICE, pdev, 3969 "%s created via shost%d channel %d\n", dev_name(dev), 3970 shost->host_no, channel); 3971 3972 *ret_vport = vport; 3973 3974 return 0; 3975 3976 delete_vport_all: 3977 transport_remove_device(dev); 3978 device_del(dev); 3979 delete_vport: 3980 transport_destroy_device(dev); 3981 spin_lock_irqsave(shost->host_lock, flags); 3982 list_del(&vport->peers); 3983 scsi_host_put(shost); /* for fc_host->vport list */ 3984 fc_host->npiv_vports_inuse--; 3985 spin_unlock_irqrestore(shost->host_lock, flags); 3986 put_device(dev->parent); 3987 kfree(vport); 3988 3989 return error; 3990 } 3991 3992 /** 3993 * fc_vport_create - Admin App or LLDD requests creation of a vport 3994 * @shost: scsi host the virtual port is connected to. 3995 * @channel: channel on shost port connected to. 3996 * @ids: The world wide names, FC4 port roles, etc for 3997 * the virtual port. 3998 * 3999 * Notes: 4000 * This routine assumes no locks are held on entry. 4001 */ 4002 struct fc_vport * 4003 fc_vport_create(struct Scsi_Host *shost, int channel, 4004 struct fc_vport_identifiers *ids) 4005 { 4006 int stat; 4007 struct fc_vport *vport; 4008 4009 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 4010 ids, &vport); 4011 return stat ? NULL : vport; 4012 } 4013 EXPORT_SYMBOL(fc_vport_create); 4014 4015 /** 4016 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 4017 * @vport: fc_vport to be terminated 4018 * 4019 * Calls the LLDD vport_delete() function, then deallocates and removes 4020 * the vport from the shost and object tree. 4021 * 4022 * Notes: 4023 * This routine assumes no locks are held on entry. 4024 */ 4025 int 4026 fc_vport_terminate(struct fc_vport *vport) 4027 { 4028 struct Scsi_Host *shost = vport_to_shost(vport); 4029 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 4030 struct fc_internal *i = to_fc_internal(shost->transportt); 4031 struct device *dev = &vport->dev; 4032 unsigned long flags; 4033 int stat; 4034 4035 if (i->f->vport_delete) 4036 stat = i->f->vport_delete(vport); 4037 else 4038 stat = -ENOENT; 4039 4040 spin_lock_irqsave(shost->host_lock, flags); 4041 vport->flags &= ~FC_VPORT_DELETING; 4042 if (!stat) { 4043 vport->flags |= FC_VPORT_DELETED; 4044 list_del(&vport->peers); 4045 fc_host->npiv_vports_inuse--; 4046 scsi_host_put(shost); /* for fc_host->vport list */ 4047 } 4048 spin_unlock_irqrestore(shost->host_lock, flags); 4049 4050 if (stat) 4051 return stat; 4052 4053 if (dev->parent != &shost->shost_gendev) 4054 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 4055 transport_remove_device(dev); 4056 device_del(dev); 4057 transport_destroy_device(dev); 4058 4059 /* 4060 * Removing our self-reference should mean our 4061 * release function gets called, which will drop the remaining 4062 * parent reference and free the data structure. 4063 */ 4064 put_device(dev); /* for self-reference */ 4065 4066 return 0; /* SUCCESS */ 4067 } 4068 EXPORT_SYMBOL(fc_vport_terminate); 4069 4070 /** 4071 * fc_vport_sched_delete - workq-based delete request for a vport 4072 * @work: vport to be deleted. 4073 */ 4074 static void 4075 fc_vport_sched_delete(struct work_struct *work) 4076 { 4077 struct fc_vport *vport = 4078 container_of(work, struct fc_vport, vport_delete_work); 4079 int stat; 4080 4081 stat = fc_vport_terminate(vport); 4082 if (stat) 4083 dev_printk(KERN_ERR, vport->dev.parent, 4084 "%s: %s could not be deleted created via " 4085 "shost%d channel %d - error %d\n", __func__, 4086 dev_name(&vport->dev), vport->shost->host_no, 4087 vport->channel, stat); 4088 } 4089 4090 4091 /* 4092 * BSG support 4093 */ 4094 4095 /** 4096 * fc_bsg_job_timeout - handler for when a bsg request timesout 4097 * @req: request that timed out 4098 */ 4099 static enum blk_eh_timer_return 4100 fc_bsg_job_timeout(struct request *req) 4101 { 4102 struct bsg_job *job = blk_mq_rq_to_pdu(req); 4103 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4104 struct fc_rport *rport = fc_bsg_to_rport(job); 4105 struct fc_internal *i = to_fc_internal(shost->transportt); 4106 int err = 0, inflight = 0; 4107 4108 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) 4109 return BLK_EH_RESET_TIMER; 4110 4111 inflight = bsg_job_get(job); 4112 4113 if (inflight && i->f->bsg_timeout) { 4114 /* call LLDD to abort the i/o as it has timed out */ 4115 err = i->f->bsg_timeout(job); 4116 if (err == -EAGAIN) { 4117 bsg_job_put(job); 4118 return BLK_EH_RESET_TIMER; 4119 } else if (err) 4120 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 4121 "abort failed with status %d\n", err); 4122 } 4123 4124 /* the blk_end_sync_io() doesn't check the error */ 4125 if (inflight) 4126 blk_mq_end_request(req, BLK_STS_IOERR); 4127 return BLK_EH_DONE; 4128 } 4129 4130 /** 4131 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 4132 * @shost: scsi host rport attached to 4133 * @job: bsg job to be processed 4134 */ 4135 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4136 { 4137 struct fc_internal *i = to_fc_internal(shost->transportt); 4138 struct fc_bsg_request *bsg_request = job->request; 4139 struct fc_bsg_reply *bsg_reply = job->reply; 4140 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4141 int ret; 4142 4143 /* check if we really have all the request data needed */ 4144 if (job->request_len < cmdlen) { 4145 ret = -ENOMSG; 4146 goto fail_host_msg; 4147 } 4148 4149 /* Validate the host command */ 4150 switch (bsg_request->msgcode) { 4151 case FC_BSG_HST_ADD_RPORT: 4152 cmdlen += sizeof(struct fc_bsg_host_add_rport); 4153 break; 4154 4155 case FC_BSG_HST_DEL_RPORT: 4156 cmdlen += sizeof(struct fc_bsg_host_del_rport); 4157 break; 4158 4159 case FC_BSG_HST_ELS_NOLOGIN: 4160 cmdlen += sizeof(struct fc_bsg_host_els); 4161 /* there better be a xmt and rcv payloads */ 4162 if ((!job->request_payload.payload_len) || 4163 (!job->reply_payload.payload_len)) { 4164 ret = -EINVAL; 4165 goto fail_host_msg; 4166 } 4167 break; 4168 4169 case FC_BSG_HST_CT: 4170 cmdlen += sizeof(struct fc_bsg_host_ct); 4171 /* there better be xmt and rcv payloads */ 4172 if ((!job->request_payload.payload_len) || 4173 (!job->reply_payload.payload_len)) { 4174 ret = -EINVAL; 4175 goto fail_host_msg; 4176 } 4177 break; 4178 4179 case FC_BSG_HST_VENDOR: 4180 cmdlen += sizeof(struct fc_bsg_host_vendor); 4181 if ((shost->hostt->vendor_id == 0L) || 4182 (bsg_request->rqst_data.h_vendor.vendor_id != 4183 shost->hostt->vendor_id)) { 4184 ret = -ESRCH; 4185 goto fail_host_msg; 4186 } 4187 break; 4188 4189 default: 4190 ret = -EBADR; 4191 goto fail_host_msg; 4192 } 4193 4194 ret = i->f->bsg_request(job); 4195 if (!ret) 4196 return 0; 4197 4198 fail_host_msg: 4199 /* return the errno failure code as the only status */ 4200 BUG_ON(job->reply_len < sizeof(uint32_t)); 4201 bsg_reply->reply_payload_rcv_len = 0; 4202 bsg_reply->result = ret; 4203 job->reply_len = sizeof(uint32_t); 4204 bsg_job_done(job, bsg_reply->result, 4205 bsg_reply->reply_payload_rcv_len); 4206 return 0; 4207 } 4208 4209 4210 /* 4211 * fc_bsg_goose_queue - restart rport queue in case it was stopped 4212 * @rport: rport to be restarted 4213 */ 4214 static void 4215 fc_bsg_goose_queue(struct fc_rport *rport) 4216 { 4217 struct request_queue *q = rport->rqst_q; 4218 4219 if (q) 4220 blk_mq_run_hw_queues(q, true); 4221 } 4222 4223 /** 4224 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 4225 * @shost: scsi host rport attached to 4226 * @job: bsg job to be processed 4227 */ 4228 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4229 { 4230 struct fc_internal *i = to_fc_internal(shost->transportt); 4231 struct fc_bsg_request *bsg_request = job->request; 4232 struct fc_bsg_reply *bsg_reply = job->reply; 4233 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4234 int ret; 4235 4236 /* check if we really have all the request data needed */ 4237 if (job->request_len < cmdlen) { 4238 ret = -ENOMSG; 4239 goto fail_rport_msg; 4240 } 4241 4242 /* Validate the rport command */ 4243 switch (bsg_request->msgcode) { 4244 case FC_BSG_RPT_ELS: 4245 cmdlen += sizeof(struct fc_bsg_rport_els); 4246 goto check_bidi; 4247 4248 case FC_BSG_RPT_CT: 4249 cmdlen += sizeof(struct fc_bsg_rport_ct); 4250 check_bidi: 4251 /* there better be xmt and rcv payloads */ 4252 if ((!job->request_payload.payload_len) || 4253 (!job->reply_payload.payload_len)) { 4254 ret = -EINVAL; 4255 goto fail_rport_msg; 4256 } 4257 break; 4258 default: 4259 ret = -EBADR; 4260 goto fail_rport_msg; 4261 } 4262 4263 ret = i->f->bsg_request(job); 4264 if (!ret) 4265 return 0; 4266 4267 fail_rport_msg: 4268 /* return the errno failure code as the only status */ 4269 BUG_ON(job->reply_len < sizeof(uint32_t)); 4270 bsg_reply->reply_payload_rcv_len = 0; 4271 bsg_reply->result = ret; 4272 job->reply_len = sizeof(uint32_t); 4273 bsg_job_done(job, bsg_reply->result, 4274 bsg_reply->reply_payload_rcv_len); 4275 return 0; 4276 } 4277 4278 static int fc_bsg_dispatch(struct bsg_job *job) 4279 { 4280 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4281 4282 if (scsi_is_fc_rport(job->dev)) 4283 return fc_bsg_rport_dispatch(shost, job); 4284 else 4285 return fc_bsg_host_dispatch(shost, job); 4286 } 4287 4288 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport) 4289 { 4290 if (rport->port_state == FC_PORTSTATE_BLOCKED && 4291 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 4292 return BLK_STS_RESOURCE; 4293 4294 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 4295 (rport->port_state != FC_PORTSTATE_MARGINAL)) 4296 return BLK_STS_IOERR; 4297 4298 return BLK_STS_OK; 4299 } 4300 4301 4302 static int fc_bsg_dispatch_prep(struct bsg_job *job) 4303 { 4304 struct fc_rport *rport = fc_bsg_to_rport(job); 4305 blk_status_t ret; 4306 4307 ret = fc_bsg_rport_prep(rport); 4308 switch (ret) { 4309 case BLK_STS_OK: 4310 break; 4311 case BLK_STS_RESOURCE: 4312 return -EAGAIN; 4313 default: 4314 return -EIO; 4315 } 4316 4317 return fc_bsg_dispatch(job); 4318 } 4319 4320 /** 4321 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4322 * @shost: shost for fc_host 4323 * @fc_host: fc_host adding the structures to 4324 */ 4325 static int 4326 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4327 { 4328 struct device *dev = &shost->shost_gendev; 4329 struct fc_internal *i = to_fc_internal(shost->transportt); 4330 struct queue_limits lim; 4331 struct request_queue *q; 4332 char bsg_name[20]; 4333 4334 fc_host->rqst_q = NULL; 4335 4336 if (!i->f->bsg_request) 4337 return -ENOTSUPP; 4338 4339 snprintf(bsg_name, sizeof(bsg_name), 4340 "fc_host%d", shost->host_no); 4341 scsi_init_limits(shost, &lim); 4342 lim.max_segments = min_not_zero(lim.max_segments, i->f->max_bsg_segments); 4343 q = bsg_setup_queue(dev, bsg_name, &lim, fc_bsg_dispatch, 4344 fc_bsg_job_timeout, i->f->dd_bsg_size); 4345 if (IS_ERR(q)) { 4346 dev_err(dev, 4347 "fc_host%d: bsg interface failed to initialize - setup queue\n", 4348 shost->host_no); 4349 return PTR_ERR(q); 4350 } 4351 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4352 fc_host->rqst_q = q; 4353 return 0; 4354 } 4355 4356 /** 4357 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4358 * @shost: shost that rport is attached to 4359 * @rport: rport that the bsg hooks are being attached to 4360 */ 4361 static int 4362 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4363 { 4364 struct device *dev = &rport->dev; 4365 struct fc_internal *i = to_fc_internal(shost->transportt); 4366 struct queue_limits lim; 4367 struct request_queue *q; 4368 4369 rport->rqst_q = NULL; 4370 4371 if (!i->f->bsg_request) 4372 return -ENOTSUPP; 4373 4374 scsi_init_limits(shost, &lim); 4375 lim.max_segments = min_not_zero(lim.max_segments, i->f->max_bsg_segments); 4376 q = bsg_setup_queue(dev, dev_name(dev), &lim, fc_bsg_dispatch_prep, 4377 fc_bsg_job_timeout, i->f->dd_bsg_size); 4378 if (IS_ERR(q)) { 4379 dev_err(dev, "failed to setup bsg queue\n"); 4380 return PTR_ERR(q); 4381 } 4382 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4383 rport->rqst_q = q; 4384 return 0; 4385 } 4386 4387 4388 /** 4389 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4390 * @q: the request_queue that is to be torn down. 4391 * 4392 * Notes: 4393 * Before unregistering the queue empty any requests that are blocked 4394 * 4395 * 4396 */ 4397 static void 4398 fc_bsg_remove(struct request_queue *q) 4399 { 4400 bsg_remove_queue(q); 4401 } 4402 4403 4404 /* Original Author: Martin Hicks */ 4405 MODULE_AUTHOR("James Smart"); 4406 MODULE_DESCRIPTION("FC Transport Attributes"); 4407 MODULE_LICENSE("GPL"); 4408 4409 module_init(fc_transport_init); 4410 module_exit(fc_transport_exit); 4411