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 scsi_timeout_action fc_eh_timed_out(struct scsi_cmnd *scmd) 2534 { 2535 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2536 2537 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2538 return SCSI_EH_RESET_TIMER; 2539 2540 return SCSI_EH_NOT_HANDLED; 2541 } 2542 EXPORT_SYMBOL(fc_eh_timed_out); 2543 2544 /* 2545 * Called by fc_user_scan to locate an rport on the shost that 2546 * matches the channel and target id, and invoke scsi_scan_target() 2547 * on the rport. 2548 */ 2549 static void 2550 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2551 { 2552 struct fc_rport *rport; 2553 unsigned long flags; 2554 2555 spin_lock_irqsave(shost->host_lock, flags); 2556 2557 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2558 if (rport->scsi_target_id == -1) 2559 continue; 2560 2561 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 2562 (rport->port_state != FC_PORTSTATE_MARGINAL)) 2563 continue; 2564 2565 if ((channel == rport->channel) && 2566 (id == rport->scsi_target_id)) { 2567 spin_unlock_irqrestore(shost->host_lock, flags); 2568 scsi_scan_target(&rport->dev, channel, id, lun, 2569 SCSI_SCAN_MANUAL); 2570 return; 2571 } 2572 } 2573 2574 spin_unlock_irqrestore(shost->host_lock, flags); 2575 } 2576 2577 /* 2578 * Called via sysfs scan routines. Necessary, as the FC transport 2579 * wants to place all target objects below the rport object. So this 2580 * routine must invoke the scsi_scan_target() routine with the rport 2581 * object as the parent. 2582 */ 2583 static int 2584 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2585 { 2586 uint chlo, chhi; 2587 uint tgtlo, tgthi; 2588 2589 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2590 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2591 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2592 return -EINVAL; 2593 2594 if (channel == SCAN_WILD_CARD) { 2595 chlo = 0; 2596 chhi = shost->max_channel + 1; 2597 } else { 2598 chlo = channel; 2599 chhi = channel + 1; 2600 } 2601 2602 if (id == SCAN_WILD_CARD) { 2603 tgtlo = 0; 2604 tgthi = shost->max_id; 2605 } else { 2606 tgtlo = id; 2607 tgthi = id + 1; 2608 } 2609 2610 for ( ; chlo < chhi; chlo++) 2611 for ( ; tgtlo < tgthi; tgtlo++) 2612 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2613 2614 return 0; 2615 } 2616 2617 struct scsi_transport_template * 2618 fc_attach_transport(struct fc_function_template *ft) 2619 { 2620 int count; 2621 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2622 GFP_KERNEL); 2623 2624 if (unlikely(!i)) 2625 return NULL; 2626 2627 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2628 i->t.target_attrs.ac.class = &fc_transport_class.class; 2629 i->t.target_attrs.ac.match = fc_target_match; 2630 i->t.target_size = sizeof(struct fc_starget_attrs); 2631 transport_container_register(&i->t.target_attrs); 2632 2633 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2634 i->t.host_attrs.ac.class = &fc_host_class.class; 2635 i->t.host_attrs.ac.match = fc_host_match; 2636 i->t.host_size = sizeof(struct fc_host_attrs); 2637 if (ft->get_fc_host_stats) 2638 i->t.host_attrs.statistics = &fc_statistics_group; 2639 transport_container_register(&i->t.host_attrs); 2640 2641 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2642 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2643 i->rport_attr_cont.ac.match = fc_rport_match; 2644 i->rport_attr_cont.statistics = &fc_rport_statistics_group; 2645 transport_container_register(&i->rport_attr_cont); 2646 2647 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2648 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2649 i->vport_attr_cont.ac.match = fc_vport_match; 2650 transport_container_register(&i->vport_attr_cont); 2651 2652 i->f = ft; 2653 2654 /* Transport uses the shost workq for scsi scanning */ 2655 i->t.create_work_queue = 1; 2656 2657 i->t.user_scan = fc_user_scan; 2658 2659 /* 2660 * Setup SCSI Target Attributes. 2661 */ 2662 count = 0; 2663 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2664 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2665 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2666 2667 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2668 2669 i->starget_attrs[count] = NULL; 2670 2671 2672 /* 2673 * Setup SCSI Host Attributes. 2674 */ 2675 count=0; 2676 SETUP_HOST_ATTRIBUTE_RD(node_name); 2677 SETUP_HOST_ATTRIBUTE_RD(port_name); 2678 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2679 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2680 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2681 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2682 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2683 if (ft->vport_create) { 2684 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2685 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2686 } 2687 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2688 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2689 SETUP_HOST_ATTRIBUTE_RD(model); 2690 SETUP_HOST_ATTRIBUTE_RD(model_description); 2691 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2692 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2693 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2694 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2695 2696 SETUP_HOST_ATTRIBUTE_RD(port_id); 2697 SETUP_HOST_ATTRIBUTE_RD(port_type); 2698 SETUP_HOST_ATTRIBUTE_RD(port_state); 2699 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2700 SETUP_HOST_ATTRIBUTE_RD(speed); 2701 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2702 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2703 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2704 2705 /* Transport-managed attributes */ 2706 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2707 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2708 if (ft->issue_fc_host_lip) 2709 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2710 if (ft->vport_create) 2711 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2712 if (ft->vport_delete) 2713 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2714 2715 BUG_ON(count > FC_HOST_NUM_ATTRS); 2716 2717 i->host_attrs[count] = NULL; 2718 2719 /* 2720 * Setup Remote Port Attributes. 2721 */ 2722 count=0; 2723 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2724 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2725 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2726 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2727 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2728 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2729 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2730 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(port_state); 2731 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2732 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2733 2734 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2735 2736 i->rport_attrs[count] = NULL; 2737 2738 /* 2739 * Setup Virtual Port Attributes. 2740 */ 2741 count=0; 2742 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2743 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2744 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2745 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2746 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2747 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2748 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2749 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2750 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2751 2752 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2753 2754 i->vport_attrs[count] = NULL; 2755 2756 return &i->t; 2757 } 2758 EXPORT_SYMBOL(fc_attach_transport); 2759 2760 void fc_release_transport(struct scsi_transport_template *t) 2761 { 2762 struct fc_internal *i = to_fc_internal(t); 2763 2764 transport_container_unregister(&i->t.target_attrs); 2765 transport_container_unregister(&i->t.host_attrs); 2766 transport_container_unregister(&i->rport_attr_cont); 2767 transport_container_unregister(&i->vport_attr_cont); 2768 2769 kfree(i); 2770 } 2771 EXPORT_SYMBOL(fc_release_transport); 2772 2773 /** 2774 * fc_queue_work - Queue work to the fc_host workqueue. 2775 * @shost: Pointer to Scsi_Host bound to fc_host. 2776 * @work: Work to queue for execution. 2777 * 2778 * Return value: 2779 * 1 - work queued for execution 2780 * 0 - work is already queued 2781 * -EINVAL - work queue doesn't exist 2782 */ 2783 static int 2784 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2785 { 2786 if (unlikely(!fc_host_work_q(shost))) { 2787 printk(KERN_ERR 2788 "ERROR: FC host '%s' attempted to queue work, " 2789 "when no workqueue created.\n", shost->hostt->name); 2790 dump_stack(); 2791 2792 return -EINVAL; 2793 } 2794 2795 return queue_work(fc_host_work_q(shost), work); 2796 } 2797 2798 /** 2799 * fc_flush_work - Flush a fc_host's workqueue. 2800 * @shost: Pointer to Scsi_Host bound to fc_host. 2801 */ 2802 static void 2803 fc_flush_work(struct Scsi_Host *shost) 2804 { 2805 if (!fc_host_work_q(shost)) { 2806 printk(KERN_ERR 2807 "ERROR: FC host '%s' attempted to flush work, " 2808 "when no workqueue created.\n", shost->hostt->name); 2809 dump_stack(); 2810 return; 2811 } 2812 2813 flush_workqueue(fc_host_work_q(shost)); 2814 } 2815 2816 /** 2817 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2818 * @shost: Pointer to Scsi_Host bound to fc_host. 2819 * @work: Work to queue for execution. 2820 * @delay: jiffies to delay the work queuing 2821 * 2822 * Return value: 2823 * 1 on success / 0 already queued / < 0 for error 2824 */ 2825 static int 2826 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2827 unsigned long delay) 2828 { 2829 if (unlikely(!fc_host_devloss_work_q(shost))) { 2830 printk(KERN_ERR 2831 "ERROR: FC host '%s' attempted to queue work, " 2832 "when no workqueue created.\n", shost->hostt->name); 2833 dump_stack(); 2834 2835 return -EINVAL; 2836 } 2837 2838 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2839 } 2840 2841 /** 2842 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2843 * @shost: Pointer to Scsi_Host bound to fc_host. 2844 */ 2845 static void 2846 fc_flush_devloss(struct Scsi_Host *shost) 2847 { 2848 if (!fc_host_devloss_work_q(shost)) { 2849 printk(KERN_ERR 2850 "ERROR: FC host '%s' attempted to flush work, " 2851 "when no workqueue created.\n", shost->hostt->name); 2852 dump_stack(); 2853 return; 2854 } 2855 2856 flush_workqueue(fc_host_devloss_work_q(shost)); 2857 } 2858 2859 2860 /** 2861 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2862 * @shost: Which &Scsi_Host 2863 * 2864 * This routine is expected to be called immediately preceding the 2865 * a driver's call to scsi_remove_host(). 2866 * 2867 * WARNING: A driver utilizing the fc_transport, which fails to call 2868 * this routine prior to scsi_remove_host(), will leave dangling 2869 * objects in /sys/class/fc_remote_ports. Access to any of these 2870 * objects can result in a system crash !!! 2871 * 2872 * Notes: 2873 * This routine assumes no locks are held on entry. 2874 */ 2875 void 2876 fc_remove_host(struct Scsi_Host *shost) 2877 { 2878 struct fc_vport *vport = NULL, *next_vport = NULL; 2879 struct fc_rport *rport = NULL, *next_rport = NULL; 2880 struct workqueue_struct *work_q; 2881 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2882 unsigned long flags; 2883 2884 spin_lock_irqsave(shost->host_lock, flags); 2885 2886 /* Remove any vports */ 2887 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2888 vport->flags |= FC_VPORT_DELETING; 2889 fc_queue_work(shost, &vport->vport_delete_work); 2890 } 2891 2892 /* Remove any remote ports */ 2893 list_for_each_entry_safe(rport, next_rport, 2894 &fc_host->rports, peers) { 2895 list_del(&rport->peers); 2896 rport->port_state = FC_PORTSTATE_DELETED; 2897 fc_queue_work(shost, &rport->rport_delete_work); 2898 } 2899 2900 list_for_each_entry_safe(rport, next_rport, 2901 &fc_host->rport_bindings, peers) { 2902 list_del(&rport->peers); 2903 rport->port_state = FC_PORTSTATE_DELETED; 2904 fc_queue_work(shost, &rport->rport_delete_work); 2905 } 2906 2907 spin_unlock_irqrestore(shost->host_lock, flags); 2908 2909 /* flush all scan work items */ 2910 scsi_flush_work(shost); 2911 2912 /* flush all stgt delete, and rport delete work items, then kill it */ 2913 if (fc_host->work_q) { 2914 work_q = fc_host->work_q; 2915 fc_host->work_q = NULL; 2916 destroy_workqueue(work_q); 2917 } 2918 2919 /* flush all devloss work items, then kill it */ 2920 if (fc_host->devloss_work_q) { 2921 work_q = fc_host->devloss_work_q; 2922 fc_host->devloss_work_q = NULL; 2923 destroy_workqueue(work_q); 2924 } 2925 } 2926 EXPORT_SYMBOL(fc_remove_host); 2927 2928 static void fc_terminate_rport_io(struct fc_rport *rport) 2929 { 2930 struct Scsi_Host *shost = rport_to_shost(rport); 2931 struct fc_internal *i = to_fc_internal(shost->transportt); 2932 2933 /* Involve the LLDD if possible to terminate all io on the rport. */ 2934 if (i->f->terminate_rport_io) 2935 i->f->terminate_rport_io(rport); 2936 2937 /* 2938 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2939 */ 2940 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2941 } 2942 2943 /** 2944 * fc_starget_delete - called to delete the scsi descendants of an rport 2945 * @work: remote port to be operated on. 2946 * 2947 * Deletes target and all sdevs. 2948 */ 2949 static void 2950 fc_starget_delete(struct work_struct *work) 2951 { 2952 struct fc_rport *rport = 2953 container_of(work, struct fc_rport, stgt_delete_work); 2954 2955 fc_terminate_rport_io(rport); 2956 scsi_remove_target(&rport->dev); 2957 } 2958 2959 2960 /** 2961 * fc_rport_final_delete - finish rport termination and delete it. 2962 * @work: remote port to be deleted. 2963 */ 2964 static void 2965 fc_rport_final_delete(struct work_struct *work) 2966 { 2967 struct fc_rport *rport = 2968 container_of(work, struct fc_rport, rport_delete_work); 2969 struct device *dev = &rport->dev; 2970 struct Scsi_Host *shost = rport_to_shost(rport); 2971 struct fc_internal *i = to_fc_internal(shost->transportt); 2972 unsigned long flags; 2973 int do_callback = 0; 2974 2975 fc_terminate_rport_io(rport); 2976 2977 /* 2978 * if a scan is pending, flush the SCSI Host work_q so that 2979 * that we can reclaim the rport scan work element. 2980 */ 2981 if (rport->flags & FC_RPORT_SCAN_PENDING) 2982 scsi_flush_work(shost); 2983 2984 /* 2985 * Cancel any outstanding timers. These should really exist 2986 * only when rmmod'ing the LLDD and we're asking for 2987 * immediate termination of the rports 2988 */ 2989 spin_lock_irqsave(shost->host_lock, flags); 2990 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2991 spin_unlock_irqrestore(shost->host_lock, flags); 2992 if (!cancel_delayed_work(&rport->fail_io_work)) 2993 fc_flush_devloss(shost); 2994 if (!cancel_delayed_work(&rport->dev_loss_work)) 2995 fc_flush_devloss(shost); 2996 cancel_work_sync(&rport->scan_work); 2997 spin_lock_irqsave(shost->host_lock, flags); 2998 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 2999 } 3000 spin_unlock_irqrestore(shost->host_lock, flags); 3001 3002 /* Delete SCSI target and sdevs */ 3003 if (rport->scsi_target_id != -1) 3004 fc_starget_delete(&rport->stgt_delete_work); 3005 3006 /* 3007 * Notify the driver that the rport is now dead. The LLDD will 3008 * also guarantee that any communication to the rport is terminated 3009 * 3010 * Avoid this call if we already called it when we preserved the 3011 * rport for the binding. 3012 */ 3013 spin_lock_irqsave(shost->host_lock, flags); 3014 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 3015 (i->f->dev_loss_tmo_callbk)) { 3016 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3017 do_callback = 1; 3018 } 3019 spin_unlock_irqrestore(shost->host_lock, flags); 3020 3021 if (do_callback) 3022 i->f->dev_loss_tmo_callbk(rport); 3023 3024 fc_bsg_remove(rport->rqst_q); 3025 3026 transport_remove_device(dev); 3027 device_del(dev); 3028 transport_destroy_device(dev); 3029 scsi_host_put(shost); /* for fc_host->rport list */ 3030 put_device(dev); /* for self-reference */ 3031 } 3032 3033 3034 /** 3035 * fc_remote_port_create - allocates and creates a remote FC port. 3036 * @shost: scsi host the remote port is connected to. 3037 * @channel: Channel on shost port connected to. 3038 * @ids: The world wide names, fc address, and FC4 port 3039 * roles for the remote port. 3040 * 3041 * Allocates and creates the remoter port structure, including the 3042 * class and sysfs creation. 3043 * 3044 * Notes: 3045 * This routine assumes no locks are held on entry. 3046 */ 3047 static struct fc_rport * 3048 fc_remote_port_create(struct Scsi_Host *shost, int channel, 3049 struct fc_rport_identifiers *ids) 3050 { 3051 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3052 struct fc_internal *fci = to_fc_internal(shost->transportt); 3053 struct fc_rport *rport; 3054 struct device *dev; 3055 unsigned long flags; 3056 int error; 3057 size_t size; 3058 3059 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 3060 rport = kzalloc(size, GFP_KERNEL); 3061 if (unlikely(!rport)) { 3062 printk(KERN_ERR "%s: allocation failure\n", __func__); 3063 return NULL; 3064 } 3065 3066 rport->maxframe_size = -1; 3067 rport->supported_classes = FC_COS_UNSPECIFIED; 3068 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 3069 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 3070 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 3071 rport->port_id = ids->port_id; 3072 rport->roles = ids->roles; 3073 rport->port_state = FC_PORTSTATE_ONLINE; 3074 if (fci->f->dd_fcrport_size) 3075 rport->dd_data = &rport[1]; 3076 rport->channel = channel; 3077 rport->fast_io_fail_tmo = -1; 3078 3079 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 3080 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 3081 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 3082 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 3083 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 3084 3085 spin_lock_irqsave(shost->host_lock, flags); 3086 3087 rport->number = fc_host->next_rport_number++; 3088 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) || 3089 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) 3090 rport->scsi_target_id = fc_host->next_target_id++; 3091 else 3092 rport->scsi_target_id = -1; 3093 list_add_tail(&rport->peers, &fc_host->rports); 3094 scsi_host_get(shost); /* for fc_host->rport list */ 3095 3096 spin_unlock_irqrestore(shost->host_lock, flags); 3097 3098 dev = &rport->dev; 3099 device_initialize(dev); /* takes self reference */ 3100 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 3101 dev->release = fc_rport_dev_release; 3102 dev_set_name(dev, "rport-%d:%d-%d", 3103 shost->host_no, channel, rport->number); 3104 transport_setup_device(dev); 3105 3106 error = device_add(dev); 3107 if (error) { 3108 printk(KERN_ERR "FC Remote Port device_add failed\n"); 3109 goto delete_rport; 3110 } 3111 transport_add_device(dev); 3112 transport_configure_device(dev); 3113 3114 fc_bsg_rportadd(shost, rport); 3115 /* ignore any bsg add error - we just can't do sgio */ 3116 3117 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 3118 /* initiate a scan of the target */ 3119 rport->flags |= FC_RPORT_SCAN_PENDING; 3120 scsi_queue_work(shost, &rport->scan_work); 3121 } 3122 3123 return rport; 3124 3125 delete_rport: 3126 transport_destroy_device(dev); 3127 spin_lock_irqsave(shost->host_lock, flags); 3128 list_del(&rport->peers); 3129 scsi_host_put(shost); /* for fc_host->rport list */ 3130 spin_unlock_irqrestore(shost->host_lock, flags); 3131 put_device(dev->parent); 3132 kfree(rport); 3133 return NULL; 3134 } 3135 3136 /** 3137 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 3138 * @shost: scsi host the remote port is connected to. 3139 * @channel: Channel on shost port connected to. 3140 * @ids: The world wide names, fc address, and FC4 port 3141 * roles for the remote port. 3142 * 3143 * The LLDD calls this routine to notify the transport of the existence 3144 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 3145 * of the port, it's FC address (port_id), and the FC4 roles that are 3146 * active for the port. 3147 * 3148 * For ports that are FCP targets (aka scsi targets), the FC transport 3149 * maintains consistent target id bindings on behalf of the LLDD. 3150 * A consistent target id binding is an assignment of a target id to 3151 * a remote port identifier, which persists while the scsi host is 3152 * attached. The remote port can disappear, then later reappear, and 3153 * it's target id assignment remains the same. This allows for shifts 3154 * in FC addressing (if binding by wwpn or wwnn) with no apparent 3155 * changes to the scsi subsystem which is based on scsi host number and 3156 * target id values. Bindings are only valid during the attachment of 3157 * the scsi host. If the host detaches, then later re-attaches, target 3158 * id bindings may change. 3159 * 3160 * This routine is responsible for returning a remote port structure. 3161 * The routine will search the list of remote ports it maintains 3162 * internally on behalf of consistent target id mappings. If found, the 3163 * remote port structure will be reused. Otherwise, a new remote port 3164 * structure will be allocated. 3165 * 3166 * Whenever a remote port is allocated, a new fc_remote_port class 3167 * device is created. 3168 * 3169 * Should not be called from interrupt context. 3170 * 3171 * Notes: 3172 * This routine assumes no locks are held on entry. 3173 */ 3174 struct fc_rport * 3175 fc_remote_port_add(struct Scsi_Host *shost, int channel, 3176 struct fc_rport_identifiers *ids) 3177 { 3178 struct fc_internal *fci = to_fc_internal(shost->transportt); 3179 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3180 struct fc_rport *rport; 3181 unsigned long flags; 3182 int match = 0; 3183 3184 /* ensure any stgt delete functions are done */ 3185 fc_flush_work(shost); 3186 3187 /* 3188 * Search the list of "active" rports, for an rport that has been 3189 * deleted, but we've held off the real delete while the target 3190 * is in a "blocked" state. 3191 */ 3192 spin_lock_irqsave(shost->host_lock, flags); 3193 3194 list_for_each_entry(rport, &fc_host->rports, peers) { 3195 3196 if ((rport->port_state == FC_PORTSTATE_BLOCKED || 3197 rport->port_state == FC_PORTSTATE_NOTPRESENT) && 3198 (rport->channel == channel)) { 3199 3200 switch (fc_host->tgtid_bind_type) { 3201 case FC_TGTID_BIND_BY_WWPN: 3202 case FC_TGTID_BIND_NONE: 3203 if (rport->port_name == ids->port_name) 3204 match = 1; 3205 break; 3206 case FC_TGTID_BIND_BY_WWNN: 3207 if (rport->node_name == ids->node_name) 3208 match = 1; 3209 break; 3210 case FC_TGTID_BIND_BY_ID: 3211 if (rport->port_id == ids->port_id) 3212 match = 1; 3213 break; 3214 } 3215 3216 if (match) { 3217 3218 memcpy(&rport->node_name, &ids->node_name, 3219 sizeof(rport->node_name)); 3220 memcpy(&rport->port_name, &ids->port_name, 3221 sizeof(rport->port_name)); 3222 rport->port_id = ids->port_id; 3223 3224 rport->port_state = FC_PORTSTATE_ONLINE; 3225 rport->roles = ids->roles; 3226 3227 spin_unlock_irqrestore(shost->host_lock, flags); 3228 3229 if (fci->f->dd_fcrport_size) 3230 memset(rport->dd_data, 0, 3231 fci->f->dd_fcrport_size); 3232 3233 /* 3234 * If we were not a target, cancel the 3235 * io terminate and rport timers, and 3236 * we're done. 3237 * 3238 * If we were a target, but our new role 3239 * doesn't indicate a target, leave the 3240 * timers running expecting the role to 3241 * change as the target fully logs in. If 3242 * it doesn't, the target will be torn down. 3243 * 3244 * If we were a target, and our role shows 3245 * we're still a target, cancel the timers 3246 * and kick off a scan. 3247 */ 3248 3249 /* was a target, not in roles */ 3250 if ((rport->scsi_target_id != -1) && 3251 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 3252 return rport; 3253 3254 /* 3255 * Stop the fail io and dev_loss timers. 3256 * If they flush, the port_state will 3257 * be checked and will NOOP the function. 3258 */ 3259 if (!cancel_delayed_work(&rport->fail_io_work)) 3260 fc_flush_devloss(shost); 3261 if (!cancel_delayed_work(&rport->dev_loss_work)) 3262 fc_flush_devloss(shost); 3263 3264 spin_lock_irqsave(shost->host_lock, flags); 3265 3266 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3267 FC_RPORT_DEVLOSS_PENDING | 3268 FC_RPORT_DEVLOSS_CALLBK_DONE); 3269 3270 spin_unlock_irqrestore(shost->host_lock, flags); 3271 3272 /* if target, initiate a scan */ 3273 if (rport->scsi_target_id != -1) { 3274 scsi_target_unblock(&rport->dev, 3275 SDEV_RUNNING); 3276 spin_lock_irqsave(shost->host_lock, 3277 flags); 3278 rport->flags |= FC_RPORT_SCAN_PENDING; 3279 scsi_queue_work(shost, 3280 &rport->scan_work); 3281 spin_unlock_irqrestore(shost->host_lock, 3282 flags); 3283 } 3284 3285 fc_bsg_goose_queue(rport); 3286 3287 return rport; 3288 } 3289 } 3290 } 3291 3292 /* 3293 * Search the bindings array 3294 * Note: if never a FCP target, you won't be on this list 3295 */ 3296 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 3297 3298 /* search for a matching consistent binding */ 3299 3300 list_for_each_entry(rport, &fc_host->rport_bindings, 3301 peers) { 3302 if (rport->channel != channel) 3303 continue; 3304 3305 switch (fc_host->tgtid_bind_type) { 3306 case FC_TGTID_BIND_BY_WWPN: 3307 if (rport->port_name == ids->port_name) 3308 match = 1; 3309 break; 3310 case FC_TGTID_BIND_BY_WWNN: 3311 if (rport->node_name == ids->node_name) 3312 match = 1; 3313 break; 3314 case FC_TGTID_BIND_BY_ID: 3315 if (rport->port_id == ids->port_id) 3316 match = 1; 3317 break; 3318 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3319 break; 3320 } 3321 3322 if (match) { 3323 list_move_tail(&rport->peers, &fc_host->rports); 3324 break; 3325 } 3326 } 3327 3328 if (match) { 3329 memcpy(&rport->node_name, &ids->node_name, 3330 sizeof(rport->node_name)); 3331 memcpy(&rport->port_name, &ids->port_name, 3332 sizeof(rport->port_name)); 3333 rport->port_id = ids->port_id; 3334 rport->port_state = FC_PORTSTATE_ONLINE; 3335 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3336 3337 if (fci->f->dd_fcrport_size) 3338 memset(rport->dd_data, 0, 3339 fci->f->dd_fcrport_size); 3340 spin_unlock_irqrestore(shost->host_lock, flags); 3341 3342 fc_remote_port_rolechg(rport, ids->roles); 3343 return rport; 3344 } 3345 } 3346 3347 spin_unlock_irqrestore(shost->host_lock, flags); 3348 3349 /* No consistent binding found - create new remote port entry */ 3350 rport = fc_remote_port_create(shost, channel, ids); 3351 3352 return rport; 3353 } 3354 EXPORT_SYMBOL(fc_remote_port_add); 3355 3356 3357 /** 3358 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 3359 * @rport: The remote port that no longer exists 3360 * 3361 * The LLDD calls this routine to notify the transport that a remote 3362 * port is no longer part of the topology. Note: Although a port 3363 * may no longer be part of the topology, it may persist in the remote 3364 * ports displayed by the fc_host. We do this under 2 conditions: 3365 * 3366 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 3367 * This allows the port to temporarily disappear, then reappear without 3368 * disrupting the SCSI device tree attached to it. During the "blocked" 3369 * period the port will still exist. 3370 * 3371 * 2) If the port was a scsi target and disappears for longer than we 3372 * expect, we'll delete the port and the tear down the SCSI device tree 3373 * attached to it. However, we want to semi-persist the target id assigned 3374 * to that port if it eventually does exist. The port structure will 3375 * remain (although with minimal information) so that the target id 3376 * bindings also remain. 3377 * 3378 * If the remote port is not an FCP Target, it will be fully torn down 3379 * and deallocated, including the fc_remote_port class device. 3380 * 3381 * If the remote port is an FCP Target, the port will be placed in a 3382 * temporary blocked state. From the LLDD's perspective, the rport no 3383 * longer exists. From the SCSI midlayer's perspective, the SCSI target 3384 * exists, but all sdevs on it are blocked from further I/O. The following 3385 * is then expected. 3386 * 3387 * If the remote port does not return (signaled by a LLDD call to 3388 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 3389 * scsi target is removed - killing all outstanding i/o and removing the 3390 * scsi devices attached to it. The port structure will be marked Not 3391 * Present and be partially cleared, leaving only enough information to 3392 * recognize the remote port relative to the scsi target id binding if 3393 * it later appears. The port will remain as long as there is a valid 3394 * binding (e.g. until the user changes the binding type or unloads the 3395 * scsi host with the binding). 3396 * 3397 * If the remote port returns within the dev_loss_tmo value (and matches 3398 * according to the target id binding type), the port structure will be 3399 * reused. If it is no longer a SCSI target, the target will be torn 3400 * down. If it continues to be a SCSI target, then the target will be 3401 * unblocked (allowing i/o to be resumed), and a scan will be activated 3402 * to ensure that all luns are detected. 3403 * 3404 * Called from normal process context only - cannot be called from interrupt. 3405 * 3406 * Notes: 3407 * This routine assumes no locks are held on entry. 3408 */ 3409 void 3410 fc_remote_port_delete(struct fc_rport *rport) 3411 { 3412 struct Scsi_Host *shost = rport_to_shost(rport); 3413 unsigned long timeout = rport->dev_loss_tmo; 3414 unsigned long flags; 3415 3416 /* 3417 * No need to flush the fc_host work_q's, as all adds are synchronous. 3418 * 3419 * We do need to reclaim the rport scan work element, so eventually 3420 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 3421 * there's still a scan pending. 3422 */ 3423 3424 spin_lock_irqsave(shost->host_lock, flags); 3425 3426 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3427 (rport->port_state != FC_PORTSTATE_MARGINAL)) { 3428 spin_unlock_irqrestore(shost->host_lock, flags); 3429 return; 3430 } 3431 3432 /* 3433 * In the past, we if this was not an FCP-Target, we would 3434 * unconditionally just jump to deleting the rport. 3435 * However, rports can be used as node containers by the LLDD, 3436 * and its not appropriate to just terminate the rport at the 3437 * first sign of a loss in connectivity. The LLDD may want to 3438 * send ELS traffic to re-validate the login. If the rport is 3439 * immediately deleted, it makes it inappropriate for a node 3440 * container. 3441 * So... we now unconditionally wait dev_loss_tmo before 3442 * destroying an rport. 3443 */ 3444 3445 rport->port_state = FC_PORTSTATE_BLOCKED; 3446 3447 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3448 3449 spin_unlock_irqrestore(shost->host_lock, flags); 3450 3451 scsi_target_block(&rport->dev); 3452 3453 /* see if we need to kill io faster than waiting for device loss */ 3454 if ((rport->fast_io_fail_tmo != -1) && 3455 (rport->fast_io_fail_tmo < timeout)) 3456 fc_queue_devloss_work(shost, &rport->fail_io_work, 3457 rport->fast_io_fail_tmo * HZ); 3458 3459 /* cap the length the devices can be blocked until they are deleted */ 3460 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3461 } 3462 EXPORT_SYMBOL(fc_remote_port_delete); 3463 3464 /** 3465 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3466 * @rport: The remote port that changed. 3467 * @roles: New roles for this port. 3468 * 3469 * Description: The LLDD calls this routine to notify the transport that the 3470 * roles on a remote port may have changed. The largest effect of this is 3471 * if a port now becomes a FCP Target, it must be allocated a 3472 * scsi target id. If the port is no longer a FCP target, any 3473 * scsi target id value assigned to it will persist in case the 3474 * role changes back to include FCP Target. No changes in the scsi 3475 * midlayer will be invoked if the role changes (in the expectation 3476 * that the role will be resumed. If it doesn't normal error processing 3477 * will take place). 3478 * 3479 * Should not be called from interrupt context. 3480 * 3481 * Notes: 3482 * This routine assumes no locks are held on entry. 3483 */ 3484 void 3485 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3486 { 3487 struct Scsi_Host *shost = rport_to_shost(rport); 3488 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3489 unsigned long flags; 3490 int create = 0; 3491 3492 spin_lock_irqsave(shost->host_lock, flags); 3493 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3494 if (rport->scsi_target_id == -1) { 3495 rport->scsi_target_id = fc_host->next_target_id++; 3496 create = 1; 3497 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3498 create = 1; 3499 } 3500 3501 rport->roles = roles; 3502 3503 spin_unlock_irqrestore(shost->host_lock, flags); 3504 3505 if (create) { 3506 /* 3507 * There may have been a delete timer running on the 3508 * port. Ensure that it is cancelled as we now know 3509 * the port is an FCP Target. 3510 * Note: we know the rport exists and is in an online 3511 * state as the LLDD would not have had an rport 3512 * reference to pass us. 3513 * 3514 * Take no action on the del_timer failure as the state 3515 * machine state change will validate the 3516 * transaction. 3517 */ 3518 if (!cancel_delayed_work(&rport->fail_io_work)) 3519 fc_flush_devloss(shost); 3520 if (!cancel_delayed_work(&rport->dev_loss_work)) 3521 fc_flush_devloss(shost); 3522 3523 spin_lock_irqsave(shost->host_lock, flags); 3524 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3525 FC_RPORT_DEVLOSS_PENDING | 3526 FC_RPORT_DEVLOSS_CALLBK_DONE); 3527 spin_unlock_irqrestore(shost->host_lock, flags); 3528 3529 /* ensure any stgt delete functions are done */ 3530 fc_flush_work(shost); 3531 3532 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3533 /* initiate a scan of the target */ 3534 spin_lock_irqsave(shost->host_lock, flags); 3535 rport->flags |= FC_RPORT_SCAN_PENDING; 3536 scsi_queue_work(shost, &rport->scan_work); 3537 spin_unlock_irqrestore(shost->host_lock, flags); 3538 } 3539 } 3540 EXPORT_SYMBOL(fc_remote_port_rolechg); 3541 3542 /** 3543 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3544 * @work: rport target that failed to reappear in the allotted time. 3545 * 3546 * Description: An attempt to delete a remote port blocks, and if it fails 3547 * to return in the allotted time this gets called. 3548 */ 3549 static void 3550 fc_timeout_deleted_rport(struct work_struct *work) 3551 { 3552 struct fc_rport *rport = 3553 container_of(work, struct fc_rport, dev_loss_work.work); 3554 struct Scsi_Host *shost = rport_to_shost(rport); 3555 struct fc_internal *i = to_fc_internal(shost->transportt); 3556 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3557 unsigned long flags; 3558 int do_callback = 0; 3559 3560 spin_lock_irqsave(shost->host_lock, flags); 3561 3562 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3563 3564 /* 3565 * If the port is ONLINE, then it came back. If it was a SCSI 3566 * target, validate it still is. If not, tear down the 3567 * scsi_target on it. 3568 */ 3569 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3570 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3571 (rport->scsi_target_id != -1) && 3572 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3573 dev_printk(KERN_ERR, &rport->dev, 3574 "blocked FC remote port time out: no longer" 3575 " a FCP target, removing starget\n"); 3576 spin_unlock_irqrestore(shost->host_lock, flags); 3577 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3578 fc_queue_work(shost, &rport->stgt_delete_work); 3579 return; 3580 } 3581 3582 /* NOOP state - we're flushing workq's */ 3583 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3584 spin_unlock_irqrestore(shost->host_lock, flags); 3585 dev_printk(KERN_ERR, &rport->dev, 3586 "blocked FC remote port time out: leaving" 3587 " rport%s alone\n", 3588 (rport->scsi_target_id != -1) ? " and starget" : ""); 3589 return; 3590 } 3591 3592 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3593 (rport->scsi_target_id == -1)) { 3594 list_del(&rport->peers); 3595 rport->port_state = FC_PORTSTATE_DELETED; 3596 dev_printk(KERN_ERR, &rport->dev, 3597 "blocked FC remote port time out: removing" 3598 " rport%s\n", 3599 (rport->scsi_target_id != -1) ? " and starget" : ""); 3600 fc_queue_work(shost, &rport->rport_delete_work); 3601 spin_unlock_irqrestore(shost->host_lock, flags); 3602 return; 3603 } 3604 3605 dev_printk(KERN_ERR, &rport->dev, 3606 "blocked FC remote port time out: removing target and " 3607 "saving binding\n"); 3608 3609 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3610 3611 /* 3612 * Note: We do not remove or clear the hostdata area. This allows 3613 * host-specific target data to persist along with the 3614 * scsi_target_id. It's up to the host to manage it's hostdata area. 3615 */ 3616 3617 /* 3618 * Reinitialize port attributes that may change if the port comes back. 3619 */ 3620 rport->maxframe_size = -1; 3621 rport->supported_classes = FC_COS_UNSPECIFIED; 3622 rport->roles = FC_PORT_ROLE_UNKNOWN; 3623 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3624 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3625 3626 /* 3627 * Pre-emptively kill I/O rather than waiting for the work queue 3628 * item to teardown the starget. (FCOE libFC folks prefer this 3629 * and to have the rport_port_id still set when it's done). 3630 */ 3631 spin_unlock_irqrestore(shost->host_lock, flags); 3632 fc_terminate_rport_io(rport); 3633 3634 spin_lock_irqsave(shost->host_lock, flags); 3635 3636 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3637 3638 /* remove the identifiers that aren't used in the consisting binding */ 3639 switch (fc_host->tgtid_bind_type) { 3640 case FC_TGTID_BIND_BY_WWPN: 3641 rport->node_name = -1; 3642 rport->port_id = -1; 3643 break; 3644 case FC_TGTID_BIND_BY_WWNN: 3645 rport->port_name = -1; 3646 rport->port_id = -1; 3647 break; 3648 case FC_TGTID_BIND_BY_ID: 3649 rport->node_name = -1; 3650 rport->port_name = -1; 3651 break; 3652 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3653 break; 3654 } 3655 3656 /* 3657 * As this only occurs if the remote port (scsi target) 3658 * went away and didn't come back - we'll remove 3659 * all attached scsi devices. 3660 */ 3661 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3662 fc_queue_work(shost, &rport->stgt_delete_work); 3663 3664 do_callback = 1; 3665 } 3666 3667 spin_unlock_irqrestore(shost->host_lock, flags); 3668 3669 /* 3670 * Notify the driver that the rport is now dead. The LLDD will 3671 * also guarantee that any communication to the rport is terminated 3672 * 3673 * Note: we set the CALLBK_DONE flag above to correspond 3674 */ 3675 if (do_callback && i->f->dev_loss_tmo_callbk) 3676 i->f->dev_loss_tmo_callbk(rport); 3677 } 3678 3679 3680 /** 3681 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3682 * @work: rport to terminate io on. 3683 * 3684 * Notes: Only requests the failure of the io, not that all are flushed 3685 * prior to returning. 3686 */ 3687 static void 3688 fc_timeout_fail_rport_io(struct work_struct *work) 3689 { 3690 struct fc_rport *rport = 3691 container_of(work, struct fc_rport, fail_io_work.work); 3692 3693 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3694 return; 3695 3696 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3697 fc_terminate_rport_io(rport); 3698 } 3699 3700 /** 3701 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3702 * @work: remote port to be scanned. 3703 */ 3704 static void 3705 fc_scsi_scan_rport(struct work_struct *work) 3706 { 3707 struct fc_rport *rport = 3708 container_of(work, struct fc_rport, scan_work); 3709 struct Scsi_Host *shost = rport_to_shost(rport); 3710 struct fc_internal *i = to_fc_internal(shost->transportt); 3711 unsigned long flags; 3712 3713 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3714 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3715 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3716 !(i->f->disable_target_scan)) { 3717 scsi_scan_target(&rport->dev, rport->channel, 3718 rport->scsi_target_id, SCAN_WILD_CARD, 3719 SCSI_SCAN_RESCAN); 3720 } 3721 3722 spin_lock_irqsave(shost->host_lock, flags); 3723 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3724 spin_unlock_irqrestore(shost->host_lock, flags); 3725 } 3726 3727 /** 3728 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport. 3729 * @rport: Remote port that scsi_eh is trying to recover. 3730 * 3731 * This routine can be called from a FC LLD scsi_eh callback. It 3732 * blocks the scsi_eh thread until the fc_rport leaves the 3733 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3734 * necessary to avoid the scsi_eh failing recovery actions for blocked 3735 * rports which would lead to offlined SCSI devices. 3736 * 3737 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3738 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3739 * passed back to scsi_eh. 3740 */ 3741 int fc_block_rport(struct fc_rport *rport) 3742 { 3743 struct Scsi_Host *shost = rport_to_shost(rport); 3744 unsigned long flags; 3745 3746 spin_lock_irqsave(shost->host_lock, flags); 3747 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3748 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3749 spin_unlock_irqrestore(shost->host_lock, flags); 3750 msleep(1000); 3751 spin_lock_irqsave(shost->host_lock, flags); 3752 } 3753 spin_unlock_irqrestore(shost->host_lock, flags); 3754 3755 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3756 return FAST_IO_FAIL; 3757 3758 return 0; 3759 } 3760 EXPORT_SYMBOL(fc_block_rport); 3761 3762 /** 3763 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3764 * @cmnd: SCSI command that scsi_eh is trying to recover 3765 * 3766 * This routine can be called from a FC LLD scsi_eh callback. It 3767 * blocks the scsi_eh thread until the fc_rport leaves the 3768 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3769 * necessary to avoid the scsi_eh failing recovery actions for blocked 3770 * rports which would lead to offlined SCSI devices. 3771 * 3772 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3773 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3774 * passed back to scsi_eh. 3775 */ 3776 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3777 { 3778 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3779 3780 if (WARN_ON_ONCE(!rport)) 3781 return FAST_IO_FAIL; 3782 3783 return fc_block_rport(rport); 3784 } 3785 EXPORT_SYMBOL(fc_block_scsi_eh); 3786 3787 /* 3788 * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not 3789 * @scmd: The SCSI command to be checked 3790 * 3791 * This checks the rport state to decide if a cmd is 3792 * retryable. 3793 * 3794 * Returns: true if the rport state is not in marginal state. 3795 */ 3796 bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd) 3797 { 3798 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 3799 3800 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3801 (scsi_cmd_to_rq(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT)) { 3802 set_host_byte(scmd, DID_TRANSPORT_MARGINAL); 3803 return false; 3804 } 3805 return true; 3806 } 3807 EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd); 3808 3809 /** 3810 * fc_vport_setup - allocates and creates a FC virtual port. 3811 * @shost: scsi host the virtual port is connected to. 3812 * @channel: Channel on shost port connected to. 3813 * @pdev: parent device for vport 3814 * @ids: The world wide names, FC4 port roles, etc for 3815 * the virtual port. 3816 * @ret_vport: The pointer to the created vport. 3817 * 3818 * Allocates and creates the vport structure, calls the parent host 3819 * to instantiate the vport, this completes w/ class and sysfs creation. 3820 * 3821 * Notes: 3822 * This routine assumes no locks are held on entry. 3823 */ 3824 static int 3825 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3826 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3827 { 3828 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3829 struct fc_internal *fci = to_fc_internal(shost->transportt); 3830 struct fc_vport *vport; 3831 struct device *dev; 3832 unsigned long flags; 3833 size_t size; 3834 int error; 3835 3836 *ret_vport = NULL; 3837 3838 if ( ! fci->f->vport_create) 3839 return -ENOENT; 3840 3841 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3842 vport = kzalloc(size, GFP_KERNEL); 3843 if (unlikely(!vport)) { 3844 printk(KERN_ERR "%s: allocation failure\n", __func__); 3845 return -ENOMEM; 3846 } 3847 3848 vport->vport_state = FC_VPORT_UNKNOWN; 3849 vport->vport_last_state = FC_VPORT_UNKNOWN; 3850 vport->node_name = ids->node_name; 3851 vport->port_name = ids->port_name; 3852 vport->roles = ids->roles; 3853 vport->vport_type = ids->vport_type; 3854 if (fci->f->dd_fcvport_size) 3855 vport->dd_data = &vport[1]; 3856 vport->shost = shost; 3857 vport->channel = channel; 3858 vport->flags = FC_VPORT_CREATING; 3859 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3860 3861 spin_lock_irqsave(shost->host_lock, flags); 3862 3863 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3864 spin_unlock_irqrestore(shost->host_lock, flags); 3865 kfree(vport); 3866 return -ENOSPC; 3867 } 3868 fc_host->npiv_vports_inuse++; 3869 vport->number = fc_host->next_vport_number++; 3870 list_add_tail(&vport->peers, &fc_host->vports); 3871 scsi_host_get(shost); /* for fc_host->vport list */ 3872 3873 spin_unlock_irqrestore(shost->host_lock, flags); 3874 3875 dev = &vport->dev; 3876 device_initialize(dev); /* takes self reference */ 3877 dev->parent = get_device(pdev); /* takes parent reference */ 3878 dev->release = fc_vport_dev_release; 3879 dev_set_name(dev, "vport-%d:%d-%d", 3880 shost->host_no, channel, vport->number); 3881 transport_setup_device(dev); 3882 3883 error = device_add(dev); 3884 if (error) { 3885 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3886 goto delete_vport; 3887 } 3888 transport_add_device(dev); 3889 transport_configure_device(dev); 3890 3891 error = fci->f->vport_create(vport, ids->disable); 3892 if (error) { 3893 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3894 goto delete_vport_all; 3895 } 3896 3897 /* 3898 * if the parent isn't the physical adapter's Scsi_Host, ensure 3899 * the Scsi_Host at least contains a symlink to the vport. 3900 */ 3901 if (pdev != &shost->shost_gendev) { 3902 error = sysfs_create_link(&shost->shost_gendev.kobj, 3903 &dev->kobj, dev_name(dev)); 3904 if (error) 3905 printk(KERN_ERR 3906 "%s: Cannot create vport symlinks for " 3907 "%s, err=%d\n", 3908 __func__, dev_name(dev), error); 3909 } 3910 spin_lock_irqsave(shost->host_lock, flags); 3911 vport->flags &= ~FC_VPORT_CREATING; 3912 spin_unlock_irqrestore(shost->host_lock, flags); 3913 3914 dev_printk(KERN_NOTICE, pdev, 3915 "%s created via shost%d channel %d\n", dev_name(dev), 3916 shost->host_no, channel); 3917 3918 *ret_vport = vport; 3919 3920 return 0; 3921 3922 delete_vport_all: 3923 transport_remove_device(dev); 3924 device_del(dev); 3925 delete_vport: 3926 transport_destroy_device(dev); 3927 spin_lock_irqsave(shost->host_lock, flags); 3928 list_del(&vport->peers); 3929 scsi_host_put(shost); /* for fc_host->vport list */ 3930 fc_host->npiv_vports_inuse--; 3931 spin_unlock_irqrestore(shost->host_lock, flags); 3932 put_device(dev->parent); 3933 kfree(vport); 3934 3935 return error; 3936 } 3937 3938 /** 3939 * fc_vport_create - Admin App or LLDD requests creation of a vport 3940 * @shost: scsi host the virtual port is connected to. 3941 * @channel: channel on shost port connected to. 3942 * @ids: The world wide names, FC4 port roles, etc for 3943 * the virtual port. 3944 * 3945 * Notes: 3946 * This routine assumes no locks are held on entry. 3947 */ 3948 struct fc_vport * 3949 fc_vport_create(struct Scsi_Host *shost, int channel, 3950 struct fc_vport_identifiers *ids) 3951 { 3952 int stat; 3953 struct fc_vport *vport; 3954 3955 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3956 ids, &vport); 3957 return stat ? NULL : vport; 3958 } 3959 EXPORT_SYMBOL(fc_vport_create); 3960 3961 /** 3962 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3963 * @vport: fc_vport to be terminated 3964 * 3965 * Calls the LLDD vport_delete() function, then deallocates and removes 3966 * the vport from the shost and object tree. 3967 * 3968 * Notes: 3969 * This routine assumes no locks are held on entry. 3970 */ 3971 int 3972 fc_vport_terminate(struct fc_vport *vport) 3973 { 3974 struct Scsi_Host *shost = vport_to_shost(vport); 3975 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3976 struct fc_internal *i = to_fc_internal(shost->transportt); 3977 struct device *dev = &vport->dev; 3978 unsigned long flags; 3979 int stat; 3980 3981 if (i->f->vport_delete) 3982 stat = i->f->vport_delete(vport); 3983 else 3984 stat = -ENOENT; 3985 3986 spin_lock_irqsave(shost->host_lock, flags); 3987 vport->flags &= ~FC_VPORT_DELETING; 3988 if (!stat) { 3989 vport->flags |= FC_VPORT_DELETED; 3990 list_del(&vport->peers); 3991 fc_host->npiv_vports_inuse--; 3992 scsi_host_put(shost); /* for fc_host->vport list */ 3993 } 3994 spin_unlock_irqrestore(shost->host_lock, flags); 3995 3996 if (stat) 3997 return stat; 3998 3999 if (dev->parent != &shost->shost_gendev) 4000 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 4001 transport_remove_device(dev); 4002 device_del(dev); 4003 transport_destroy_device(dev); 4004 4005 /* 4006 * Removing our self-reference should mean our 4007 * release function gets called, which will drop the remaining 4008 * parent reference and free the data structure. 4009 */ 4010 put_device(dev); /* for self-reference */ 4011 4012 return 0; /* SUCCESS */ 4013 } 4014 EXPORT_SYMBOL(fc_vport_terminate); 4015 4016 /** 4017 * fc_vport_sched_delete - workq-based delete request for a vport 4018 * @work: vport to be deleted. 4019 */ 4020 static void 4021 fc_vport_sched_delete(struct work_struct *work) 4022 { 4023 struct fc_vport *vport = 4024 container_of(work, struct fc_vport, vport_delete_work); 4025 int stat; 4026 4027 stat = fc_vport_terminate(vport); 4028 if (stat) 4029 dev_printk(KERN_ERR, vport->dev.parent, 4030 "%s: %s could not be deleted created via " 4031 "shost%d channel %d - error %d\n", __func__, 4032 dev_name(&vport->dev), vport->shost->host_no, 4033 vport->channel, stat); 4034 } 4035 4036 4037 /* 4038 * BSG support 4039 */ 4040 4041 /** 4042 * fc_bsg_job_timeout - handler for when a bsg request timesout 4043 * @req: request that timed out 4044 */ 4045 static enum blk_eh_timer_return 4046 fc_bsg_job_timeout(struct request *req) 4047 { 4048 struct bsg_job *job = blk_mq_rq_to_pdu(req); 4049 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4050 struct fc_rport *rport = fc_bsg_to_rport(job); 4051 struct fc_internal *i = to_fc_internal(shost->transportt); 4052 int err = 0, inflight = 0; 4053 4054 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) 4055 return BLK_EH_RESET_TIMER; 4056 4057 inflight = bsg_job_get(job); 4058 4059 if (inflight && i->f->bsg_timeout) { 4060 /* call LLDD to abort the i/o as it has timed out */ 4061 err = i->f->bsg_timeout(job); 4062 if (err == -EAGAIN) { 4063 bsg_job_put(job); 4064 return BLK_EH_RESET_TIMER; 4065 } else if (err) 4066 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 4067 "abort failed with status %d\n", err); 4068 } 4069 4070 /* the blk_end_sync_io() doesn't check the error */ 4071 if (inflight) 4072 blk_mq_end_request(req, BLK_STS_IOERR); 4073 return BLK_EH_DONE; 4074 } 4075 4076 /** 4077 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 4078 * @shost: scsi host rport attached to 4079 * @job: bsg job to be processed 4080 */ 4081 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4082 { 4083 struct fc_internal *i = to_fc_internal(shost->transportt); 4084 struct fc_bsg_request *bsg_request = job->request; 4085 struct fc_bsg_reply *bsg_reply = job->reply; 4086 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4087 int ret; 4088 4089 /* check if we really have all the request data needed */ 4090 if (job->request_len < cmdlen) { 4091 ret = -ENOMSG; 4092 goto fail_host_msg; 4093 } 4094 4095 /* Validate the host command */ 4096 switch (bsg_request->msgcode) { 4097 case FC_BSG_HST_ADD_RPORT: 4098 cmdlen += sizeof(struct fc_bsg_host_add_rport); 4099 break; 4100 4101 case FC_BSG_HST_DEL_RPORT: 4102 cmdlen += sizeof(struct fc_bsg_host_del_rport); 4103 break; 4104 4105 case FC_BSG_HST_ELS_NOLOGIN: 4106 cmdlen += sizeof(struct fc_bsg_host_els); 4107 /* there better be a xmt and rcv payloads */ 4108 if ((!job->request_payload.payload_len) || 4109 (!job->reply_payload.payload_len)) { 4110 ret = -EINVAL; 4111 goto fail_host_msg; 4112 } 4113 break; 4114 4115 case FC_BSG_HST_CT: 4116 cmdlen += sizeof(struct fc_bsg_host_ct); 4117 /* there better be xmt and rcv payloads */ 4118 if ((!job->request_payload.payload_len) || 4119 (!job->reply_payload.payload_len)) { 4120 ret = -EINVAL; 4121 goto fail_host_msg; 4122 } 4123 break; 4124 4125 case FC_BSG_HST_VENDOR: 4126 cmdlen += sizeof(struct fc_bsg_host_vendor); 4127 if ((shost->hostt->vendor_id == 0L) || 4128 (bsg_request->rqst_data.h_vendor.vendor_id != 4129 shost->hostt->vendor_id)) { 4130 ret = -ESRCH; 4131 goto fail_host_msg; 4132 } 4133 break; 4134 4135 default: 4136 ret = -EBADR; 4137 goto fail_host_msg; 4138 } 4139 4140 ret = i->f->bsg_request(job); 4141 if (!ret) 4142 return 0; 4143 4144 fail_host_msg: 4145 /* return the errno failure code as the only status */ 4146 BUG_ON(job->reply_len < sizeof(uint32_t)); 4147 bsg_reply->reply_payload_rcv_len = 0; 4148 bsg_reply->result = ret; 4149 job->reply_len = sizeof(uint32_t); 4150 bsg_job_done(job, bsg_reply->result, 4151 bsg_reply->reply_payload_rcv_len); 4152 return 0; 4153 } 4154 4155 4156 /* 4157 * fc_bsg_goose_queue - restart rport queue in case it was stopped 4158 * @rport: rport to be restarted 4159 */ 4160 static void 4161 fc_bsg_goose_queue(struct fc_rport *rport) 4162 { 4163 struct request_queue *q = rport->rqst_q; 4164 4165 if (q) 4166 blk_mq_run_hw_queues(q, true); 4167 } 4168 4169 /** 4170 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 4171 * @shost: scsi host rport attached to 4172 * @job: bsg job to be processed 4173 */ 4174 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4175 { 4176 struct fc_internal *i = to_fc_internal(shost->transportt); 4177 struct fc_bsg_request *bsg_request = job->request; 4178 struct fc_bsg_reply *bsg_reply = job->reply; 4179 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4180 int ret; 4181 4182 /* check if we really have all the request data needed */ 4183 if (job->request_len < cmdlen) { 4184 ret = -ENOMSG; 4185 goto fail_rport_msg; 4186 } 4187 4188 /* Validate the rport command */ 4189 switch (bsg_request->msgcode) { 4190 case FC_BSG_RPT_ELS: 4191 cmdlen += sizeof(struct fc_bsg_rport_els); 4192 goto check_bidi; 4193 4194 case FC_BSG_RPT_CT: 4195 cmdlen += sizeof(struct fc_bsg_rport_ct); 4196 check_bidi: 4197 /* there better be xmt and rcv payloads */ 4198 if ((!job->request_payload.payload_len) || 4199 (!job->reply_payload.payload_len)) { 4200 ret = -EINVAL; 4201 goto fail_rport_msg; 4202 } 4203 break; 4204 default: 4205 ret = -EBADR; 4206 goto fail_rport_msg; 4207 } 4208 4209 ret = i->f->bsg_request(job); 4210 if (!ret) 4211 return 0; 4212 4213 fail_rport_msg: 4214 /* return the errno failure code as the only status */ 4215 BUG_ON(job->reply_len < sizeof(uint32_t)); 4216 bsg_reply->reply_payload_rcv_len = 0; 4217 bsg_reply->result = ret; 4218 job->reply_len = sizeof(uint32_t); 4219 bsg_job_done(job, bsg_reply->result, 4220 bsg_reply->reply_payload_rcv_len); 4221 return 0; 4222 } 4223 4224 static int fc_bsg_dispatch(struct bsg_job *job) 4225 { 4226 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4227 4228 if (scsi_is_fc_rport(job->dev)) 4229 return fc_bsg_rport_dispatch(shost, job); 4230 else 4231 return fc_bsg_host_dispatch(shost, job); 4232 } 4233 4234 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport) 4235 { 4236 if (rport->port_state == FC_PORTSTATE_BLOCKED && 4237 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 4238 return BLK_STS_RESOURCE; 4239 4240 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 4241 (rport->port_state != FC_PORTSTATE_MARGINAL)) 4242 return BLK_STS_IOERR; 4243 4244 return BLK_STS_OK; 4245 } 4246 4247 4248 static int fc_bsg_dispatch_prep(struct bsg_job *job) 4249 { 4250 struct fc_rport *rport = fc_bsg_to_rport(job); 4251 blk_status_t ret; 4252 4253 ret = fc_bsg_rport_prep(rport); 4254 switch (ret) { 4255 case BLK_STS_OK: 4256 break; 4257 case BLK_STS_RESOURCE: 4258 return -EAGAIN; 4259 default: 4260 return -EIO; 4261 } 4262 4263 return fc_bsg_dispatch(job); 4264 } 4265 4266 /** 4267 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4268 * @shost: shost for fc_host 4269 * @fc_host: fc_host adding the structures to 4270 */ 4271 static int 4272 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4273 { 4274 struct device *dev = &shost->shost_gendev; 4275 struct fc_internal *i = to_fc_internal(shost->transportt); 4276 struct request_queue *q; 4277 char bsg_name[20]; 4278 4279 fc_host->rqst_q = NULL; 4280 4281 if (!i->f->bsg_request) 4282 return -ENOTSUPP; 4283 4284 snprintf(bsg_name, sizeof(bsg_name), 4285 "fc_host%d", shost->host_no); 4286 4287 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout, 4288 i->f->dd_bsg_size); 4289 if (IS_ERR(q)) { 4290 dev_err(dev, 4291 "fc_host%d: bsg interface failed to initialize - setup queue\n", 4292 shost->host_no); 4293 return PTR_ERR(q); 4294 } 4295 __scsi_init_queue(shost, q); 4296 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4297 fc_host->rqst_q = q; 4298 return 0; 4299 } 4300 4301 /** 4302 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4303 * @shost: shost that rport is attached to 4304 * @rport: rport that the bsg hooks are being attached to 4305 */ 4306 static int 4307 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4308 { 4309 struct device *dev = &rport->dev; 4310 struct fc_internal *i = to_fc_internal(shost->transportt); 4311 struct request_queue *q; 4312 4313 rport->rqst_q = NULL; 4314 4315 if (!i->f->bsg_request) 4316 return -ENOTSUPP; 4317 4318 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep, 4319 fc_bsg_job_timeout, i->f->dd_bsg_size); 4320 if (IS_ERR(q)) { 4321 dev_err(dev, "failed to setup bsg queue\n"); 4322 return PTR_ERR(q); 4323 } 4324 __scsi_init_queue(shost, q); 4325 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4326 rport->rqst_q = q; 4327 return 0; 4328 } 4329 4330 4331 /** 4332 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4333 * @q: the request_queue that is to be torn down. 4334 * 4335 * Notes: 4336 * Before unregistering the queue empty any requests that are blocked 4337 * 4338 * 4339 */ 4340 static void 4341 fc_bsg_remove(struct request_queue *q) 4342 { 4343 bsg_remove_queue(q); 4344 } 4345 4346 4347 /* Original Author: Martin Hicks */ 4348 MODULE_AUTHOR("James Smart"); 4349 MODULE_DESCRIPTION("FC Transport Attributes"); 4350 MODULE_LICENSE("GPL"); 4351 4352 module_init(fc_transport_init); 4353 module_exit(fc_transport_exit); 4354