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