1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * FiberChannel transport specific attributes exported to sysfs. 4 * 5 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. 6 * Copyright (C) 2004-2007 James Smart, Emulex Corporation 7 * Rewrite for host, target, device, and remote port attributes, 8 * statistics, and service functions... 9 * Add vports, etc 10 */ 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/slab.h> 14 #include <linux/delay.h> 15 #include <linux/kernel.h> 16 #include <linux/bsg-lib.h> 17 #include <scsi/scsi_device.h> 18 #include <scsi/scsi_host.h> 19 #include <scsi/scsi_transport.h> 20 #include <scsi/scsi_transport_fc.h> 21 #include <scsi/scsi_cmnd.h> 22 #include <net/netlink.h> 23 #include <scsi/scsi_netlink_fc.h> 24 #include <scsi/scsi_bsg_fc.h> 25 #include <uapi/scsi/fc/fc_els.h> 26 #include "scsi_priv.h" 27 28 static int fc_queue_work(struct Scsi_Host *, struct work_struct *); 29 static void fc_vport_sched_delete(struct work_struct *work); 30 static int fc_vport_setup(struct Scsi_Host *shost, int channel, 31 struct device *pdev, struct fc_vport_identifiers *ids, 32 struct fc_vport **vport); 33 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); 34 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); 35 static void fc_bsg_remove(struct request_queue *); 36 static void fc_bsg_goose_queue(struct fc_rport *); 37 static void fc_li_stats_update(u16 event_type, 38 struct fc_fpin_stats *stats); 39 static void fc_delivery_stats_update(u32 reason_code, 40 struct fc_fpin_stats *stats); 41 static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats); 42 43 /* 44 * Module Parameters 45 */ 46 47 /* 48 * dev_loss_tmo: the default number of seconds that the FC transport 49 * should insulate the loss of a remote port. 50 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 51 */ 52 static unsigned int fc_dev_loss_tmo = 60; /* seconds */ 53 54 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); 55 MODULE_PARM_DESC(dev_loss_tmo, 56 "Maximum number of seconds that the FC transport should" 57 " insulate the loss of a remote port. Once this value is" 58 " exceeded, the scsi target is removed. Value should be" 59 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" 60 " fast_io_fail_tmo is not set."); 61 62 /* 63 * Redefine so that we can have same named attributes in the 64 * sdev/starget/host objects. 65 */ 66 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 67 struct device_attribute device_attr_##_prefix##_##_name = \ 68 __ATTR(_name,_mode,_show,_store) 69 70 #define fc_enum_name_search(title, table_type, table) \ 71 static const char *get_fc_##title##_name(enum table_type table_key) \ 72 { \ 73 int i; \ 74 char *name = NULL; \ 75 \ 76 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 77 if (table[i].value == table_key) { \ 78 name = table[i].name; \ 79 break; \ 80 } \ 81 } \ 82 return name; \ 83 } 84 85 #define fc_enum_name_match(title, table_type, table) \ 86 static int get_fc_##title##_match(const char *table_key, \ 87 enum table_type *value) \ 88 { \ 89 int i; \ 90 \ 91 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 92 if (strncmp(table_key, table[i].name, \ 93 table[i].matchlen) == 0) { \ 94 *value = table[i].value; \ 95 return 0; /* success */ \ 96 } \ 97 } \ 98 return 1; /* failure */ \ 99 } 100 101 102 /* Convert fc_port_type values to ascii string name */ 103 static struct { 104 enum fc_port_type value; 105 char *name; 106 } fc_port_type_names[] = { 107 { FC_PORTTYPE_UNKNOWN, "Unknown" }, 108 { FC_PORTTYPE_OTHER, "Other" }, 109 { FC_PORTTYPE_NOTPRESENT, "Not Present" }, 110 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, 111 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, 112 { FC_PORTTYPE_LPORT, "LPort (private loop)" }, 113 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, 114 { FC_PORTTYPE_NPIV, "NPIV VPORT" }, 115 }; 116 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) 117 #define FC_PORTTYPE_MAX_NAMELEN 50 118 119 /* Reuse fc_port_type enum function for vport_type */ 120 #define get_fc_vport_type_name get_fc_port_type_name 121 122 123 /* Convert fc_host_event_code values to ascii string name */ 124 static const struct { 125 enum fc_host_event_code value; 126 char *name; 127 } fc_host_event_code_names[] = { 128 { FCH_EVT_LIP, "lip" }, 129 { FCH_EVT_LINKUP, "link_up" }, 130 { FCH_EVT_LINKDOWN, "link_down" }, 131 { FCH_EVT_LIPRESET, "lip_reset" }, 132 { FCH_EVT_RSCN, "rscn" }, 133 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, 134 { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, 135 { FCH_EVT_PORT_ONLINE, "port_online" }, 136 { FCH_EVT_PORT_OFFLINE, "port_offline" }, 137 { FCH_EVT_PORT_FABRIC, "port_fabric" }, 138 { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, 139 { FCH_EVT_LINK_FPIN, "link_FPIN" }, 140 { FCH_EVT_LINK_FPIN_ACK, "link_FPIN_ACK" }, 141 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, 142 }; 143 fc_enum_name_search(host_event_code, fc_host_event_code, 144 fc_host_event_code_names) 145 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 146 147 148 /* Convert fc_port_state values to ascii string name */ 149 static struct { 150 enum fc_port_state value; 151 char *name; 152 int matchlen; 153 } fc_port_state_names[] = { 154 { FC_PORTSTATE_UNKNOWN, "Unknown", 7}, 155 { FC_PORTSTATE_NOTPRESENT, "Not Present", 11 }, 156 { FC_PORTSTATE_ONLINE, "Online", 6 }, 157 { FC_PORTSTATE_OFFLINE, "Offline", 7 }, 158 { FC_PORTSTATE_BLOCKED, "Blocked", 7 }, 159 { FC_PORTSTATE_BYPASSED, "Bypassed", 8 }, 160 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics", 11 }, 161 { FC_PORTSTATE_LINKDOWN, "Linkdown", 8 }, 162 { FC_PORTSTATE_ERROR, "Error", 5 }, 163 { FC_PORTSTATE_LOOPBACK, "Loopback", 8 }, 164 { FC_PORTSTATE_DELETED, "Deleted", 7 }, 165 { FC_PORTSTATE_MARGINAL, "Marginal", 8 }, 166 }; 167 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) 168 fc_enum_name_match(port_state, fc_port_state, fc_port_state_names) 169 #define FC_PORTSTATE_MAX_NAMELEN 20 170 171 172 /* Convert fc_vport_state values to ascii string name */ 173 static struct { 174 enum fc_vport_state value; 175 char *name; 176 } fc_vport_state_names[] = { 177 { FC_VPORT_UNKNOWN, "Unknown" }, 178 { FC_VPORT_ACTIVE, "Active" }, 179 { FC_VPORT_DISABLED, "Disabled" }, 180 { FC_VPORT_LINKDOWN, "Linkdown" }, 181 { FC_VPORT_INITIALIZING, "Initializing" }, 182 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, 183 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, 184 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, 185 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, 186 { FC_VPORT_FAILED, "VPort Failed" }, 187 }; 188 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) 189 #define FC_VPORTSTATE_MAX_NAMELEN 24 190 191 /* Reuse fc_vport_state enum function for vport_last_state */ 192 #define get_fc_vport_last_state_name get_fc_vport_state_name 193 194 195 /* Convert fc_tgtid_binding_type values to ascii string name */ 196 static const struct { 197 enum fc_tgtid_binding_type value; 198 char *name; 199 int matchlen; 200 } fc_tgtid_binding_type_names[] = { 201 { FC_TGTID_BIND_NONE, "none", 4 }, 202 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, 203 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, 204 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, 205 }; 206 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, 207 fc_tgtid_binding_type_names) 208 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, 209 fc_tgtid_binding_type_names) 210 #define FC_BINDTYPE_MAX_NAMELEN 30 211 212 213 #define fc_bitfield_name_search(title, table) \ 214 static ssize_t \ 215 get_fc_##title##_names(u32 table_key, char *buf) \ 216 { \ 217 char *prefix = ""; \ 218 ssize_t len = 0; \ 219 int i; \ 220 \ 221 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 222 if (table[i].value & table_key) { \ 223 len += sprintf(buf + len, "%s%s", \ 224 prefix, table[i].name); \ 225 prefix = ", "; \ 226 } \ 227 } \ 228 len += sprintf(buf + len, "\n"); \ 229 return len; \ 230 } 231 232 233 /* Convert FC_COS bit values to ascii string name */ 234 static const struct { 235 u32 value; 236 char *name; 237 } fc_cos_names[] = { 238 { FC_COS_CLASS1, "Class 1" }, 239 { FC_COS_CLASS2, "Class 2" }, 240 { FC_COS_CLASS3, "Class 3" }, 241 { FC_COS_CLASS4, "Class 4" }, 242 { FC_COS_CLASS6, "Class 6" }, 243 }; 244 fc_bitfield_name_search(cos, fc_cos_names) 245 246 247 /* Convert FC_PORTSPEED bit values to ascii string name */ 248 static const struct { 249 u32 value; 250 char *name; 251 } fc_port_speed_names[] = { 252 { FC_PORTSPEED_1GBIT, "1 Gbit" }, 253 { FC_PORTSPEED_2GBIT, "2 Gbit" }, 254 { FC_PORTSPEED_4GBIT, "4 Gbit" }, 255 { FC_PORTSPEED_10GBIT, "10 Gbit" }, 256 { FC_PORTSPEED_8GBIT, "8 Gbit" }, 257 { FC_PORTSPEED_16GBIT, "16 Gbit" }, 258 { FC_PORTSPEED_32GBIT, "32 Gbit" }, 259 { FC_PORTSPEED_20GBIT, "20 Gbit" }, 260 { FC_PORTSPEED_40GBIT, "40 Gbit" }, 261 { FC_PORTSPEED_50GBIT, "50 Gbit" }, 262 { FC_PORTSPEED_100GBIT, "100 Gbit" }, 263 { FC_PORTSPEED_25GBIT, "25 Gbit" }, 264 { FC_PORTSPEED_64GBIT, "64 Gbit" }, 265 { FC_PORTSPEED_128GBIT, "128 Gbit" }, 266 { FC_PORTSPEED_256GBIT, "256 Gbit" }, 267 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, 268 }; fc_bitfield_name_search(port_speed,fc_port_speed_names)269 fc_bitfield_name_search(port_speed, fc_port_speed_names) 270 271 272 static int 273 show_fc_fc4s (char *buf, u8 *fc4_list) 274 { 275 int i, len=0; 276 277 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) 278 len += sprintf(buf + len , "0x%02x ", *fc4_list); 279 len += sprintf(buf + len, "\n"); 280 return len; 281 } 282 283 284 /* Convert FC_PORT_ROLE bit values to ascii string name */ 285 static const struct { 286 u32 value; 287 char *name; 288 } fc_port_role_names[] = { 289 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, 290 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, 291 { FC_PORT_ROLE_IP_PORT, "IP Port" }, 292 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" }, 293 { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" }, 294 { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" }, 295 { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" }, 296 }; 297 fc_bitfield_name_search(port_roles, fc_port_role_names) 298 299 /* 300 * Define roles that are specific to port_id. Values are relative to ROLE_MASK. 301 */ 302 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 303 #define FC_WELLKNOWN_ROLE_MASK 0x00000f 304 #define FC_FPORT_PORTID 0x00000e 305 #define FC_FABCTLR_PORTID 0x00000d 306 #define FC_DIRSRVR_PORTID 0x00000c 307 #define FC_TIMESRVR_PORTID 0x00000b 308 #define FC_MGMTSRVR_PORTID 0x00000a 309 310 311 static void fc_timeout_deleted_rport(struct work_struct *work); 312 static void fc_timeout_fail_rport_io(struct work_struct *work); 313 static void fc_scsi_scan_rport(struct work_struct *work); 314 315 /* 316 * Attribute counts pre object type... 317 * Increase these values if you add attributes 318 */ 319 #define FC_STARGET_NUM_ATTRS 3 320 #define FC_RPORT_NUM_ATTRS 10 321 #define FC_VPORT_NUM_ATTRS 9 322 #define FC_HOST_NUM_ATTRS 29 323 324 struct fc_internal { 325 struct scsi_transport_template t; 326 struct fc_function_template *f; 327 328 /* 329 * For attributes : each object has : 330 * An array of the actual attributes structures 331 * An array of null-terminated pointers to the attribute 332 * structures - used for mid-layer interaction. 333 * 334 * The attribute containers for the starget and host are are 335 * part of the midlayer. As the remote port is specific to the 336 * fc transport, we must provide the attribute container. 337 */ 338 struct device_attribute private_starget_attrs[ 339 FC_STARGET_NUM_ATTRS]; 340 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; 341 342 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; 343 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; 344 345 struct transport_container rport_attr_cont; 346 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; 347 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; 348 349 struct transport_container vport_attr_cont; 350 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; 351 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; 352 }; 353 354 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) 355 fc_target_setup(struct transport_container * tc,struct device * dev,struct device * cdev)356 static int fc_target_setup(struct transport_container *tc, struct device *dev, 357 struct device *cdev) 358 { 359 struct scsi_target *starget = to_scsi_target(dev); 360 struct fc_rport *rport = starget_to_rport(starget); 361 362 /* 363 * if parent is remote port, use values from remote port. 364 * Otherwise, this host uses the fc_transport, but not the 365 * remote port interface. As such, initialize to known non-values. 366 */ 367 if (rport) { 368 fc_starget_node_name(starget) = rport->node_name; 369 fc_starget_port_name(starget) = rport->port_name; 370 fc_starget_port_id(starget) = rport->port_id; 371 } else { 372 fc_starget_node_name(starget) = -1; 373 fc_starget_port_name(starget) = -1; 374 fc_starget_port_id(starget) = -1; 375 } 376 377 return 0; 378 } 379 380 static DECLARE_TRANSPORT_CLASS(fc_transport_class, 381 "fc_transport", 382 fc_target_setup, 383 NULL, 384 NULL); 385 fc_host_setup(struct transport_container * tc,struct device * dev,struct device * cdev)386 static int fc_host_setup(struct transport_container *tc, struct device *dev, 387 struct device *cdev) 388 { 389 struct Scsi_Host *shost = dev_to_shost(dev); 390 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 391 392 /* 393 * Set default values easily detected by the midlayer as 394 * failure cases. The scsi lldd is responsible for initializing 395 * all transport attributes to valid values per host. 396 */ 397 fc_host->node_name = -1; 398 fc_host->port_name = -1; 399 fc_host->permanent_port_name = -1; 400 fc_host->supported_classes = FC_COS_UNSPECIFIED; 401 memset(fc_host->supported_fc4s, 0, 402 sizeof(fc_host->supported_fc4s)); 403 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; 404 fc_host->maxframe_size = -1; 405 fc_host->max_npiv_vports = 0; 406 memset(fc_host->serial_number, 0, 407 sizeof(fc_host->serial_number)); 408 memset(fc_host->manufacturer, 0, 409 sizeof(fc_host->manufacturer)); 410 memset(fc_host->model, 0, 411 sizeof(fc_host->model)); 412 memset(fc_host->model_description, 0, 413 sizeof(fc_host->model_description)); 414 memset(fc_host->hardware_version, 0, 415 sizeof(fc_host->hardware_version)); 416 memset(fc_host->driver_version, 0, 417 sizeof(fc_host->driver_version)); 418 memset(fc_host->firmware_version, 0, 419 sizeof(fc_host->firmware_version)); 420 memset(fc_host->optionrom_version, 0, 421 sizeof(fc_host->optionrom_version)); 422 423 fc_host->port_id = -1; 424 fc_host->port_type = FC_PORTTYPE_UNKNOWN; 425 fc_host->port_state = FC_PORTSTATE_UNKNOWN; 426 memset(fc_host->active_fc4s, 0, 427 sizeof(fc_host->active_fc4s)); 428 fc_host->speed = FC_PORTSPEED_UNKNOWN; 429 fc_host->fabric_name = -1; 430 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); 431 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); 432 memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats)); 433 434 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; 435 436 INIT_LIST_HEAD(&fc_host->rports); 437 INIT_LIST_HEAD(&fc_host->rport_bindings); 438 INIT_LIST_HEAD(&fc_host->vports); 439 fc_host->next_rport_number = 0; 440 fc_host->next_target_id = 0; 441 fc_host->next_vport_number = 0; 442 fc_host->npiv_vports_inuse = 0; 443 444 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), 445 "fc_wq_%d", shost->host_no); 446 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); 447 if (!fc_host->work_q) 448 return -ENOMEM; 449 450 fc_host->dev_loss_tmo = fc_dev_loss_tmo; 451 snprintf(fc_host->devloss_work_q_name, 452 sizeof(fc_host->devloss_work_q_name), 453 "fc_dl_%d", shost->host_no); 454 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, 455 fc_host->devloss_work_q_name); 456 if (!fc_host->devloss_work_q) { 457 destroy_workqueue(fc_host->work_q); 458 fc_host->work_q = NULL; 459 return -ENOMEM; 460 } 461 462 fc_bsg_hostadd(shost, fc_host); 463 /* ignore any bsg add error - we just can't do sgio */ 464 465 return 0; 466 } 467 fc_host_remove(struct transport_container * tc,struct device * dev,struct device * cdev)468 static int fc_host_remove(struct transport_container *tc, struct device *dev, 469 struct device *cdev) 470 { 471 struct Scsi_Host *shost = dev_to_shost(dev); 472 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 473 474 fc_bsg_remove(fc_host->rqst_q); 475 return 0; 476 } 477 478 static DECLARE_TRANSPORT_CLASS(fc_host_class, 479 "fc_host", 480 fc_host_setup, 481 fc_host_remove, 482 NULL); 483 484 /* 485 * Setup and Remove actions for remote ports are handled 486 * in the service functions below. 487 */ 488 static DECLARE_TRANSPORT_CLASS(fc_rport_class, 489 "fc_remote_ports", 490 NULL, 491 NULL, 492 NULL); 493 494 /* 495 * Setup and Remove actions for virtual ports are handled 496 * in the service functions below. 497 */ 498 static DECLARE_TRANSPORT_CLASS(fc_vport_class, 499 "fc_vports", 500 NULL, 501 NULL, 502 NULL); 503 504 /* 505 * Netlink Infrastructure 506 */ 507 508 static atomic_t fc_event_seq; 509 510 /** 511 * fc_get_event_number - Obtain the next sequential FC event number 512 * 513 * Notes: 514 * We could have inlined this, but it would have required fc_event_seq to 515 * be exposed. For now, live with the subroutine call. 516 * Atomic used to avoid lock/unlock... 517 */ 518 u32 fc_get_event_number(void)519 fc_get_event_number(void) 520 { 521 return atomic_add_return(1, &fc_event_seq); 522 } 523 EXPORT_SYMBOL(fc_get_event_number); 524 525 /** 526 * fc_host_post_fc_event - routine to do the work of posting an event 527 * on an fc_host. 528 * @shost: host the event occurred on 529 * @event_number: fc event number obtained from get_fc_event_number() 530 * @event_code: fc_host event being posted 531 * @data_len: amount, in bytes, of event data 532 * @data_buf: pointer to event data 533 * @vendor_id: value for Vendor id 534 * 535 * Notes: 536 * This routine assumes no locks are held on entry. 537 */ 538 void fc_host_post_fc_event(struct Scsi_Host * shost,u32 event_number,enum fc_host_event_code event_code,u32 data_len,char * data_buf,u64 vendor_id)539 fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number, 540 enum fc_host_event_code event_code, 541 u32 data_len, char *data_buf, u64 vendor_id) 542 { 543 struct sk_buff *skb; 544 struct nlmsghdr *nlh; 545 struct fc_nl_event *event; 546 const char *name; 547 size_t len, padding; 548 int err; 549 550 if (!data_buf || data_len < 4) 551 data_len = 0; 552 553 if (!scsi_nl_sock) { 554 err = -ENOENT; 555 goto send_fail; 556 } 557 558 len = FC_NL_MSGALIGN(sizeof(*event) - sizeof(event->event_data) + data_len); 559 560 skb = nlmsg_new(len, GFP_KERNEL); 561 if (!skb) { 562 err = -ENOBUFS; 563 goto send_fail; 564 } 565 566 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0); 567 if (!nlh) { 568 err = -ENOBUFS; 569 goto send_fail_skb; 570 } 571 event = nlmsg_data(nlh); 572 573 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, 574 FC_NL_ASYNC_EVENT, len); 575 event->seconds = ktime_get_real_seconds(); 576 event->vendor_id = vendor_id; 577 event->host_no = shost->host_no; 578 event->event_datalen = data_len; /* bytes */ 579 event->event_num = event_number; 580 event->event_code = event_code; 581 if (data_len) 582 memcpy(event->event_data_flex, data_buf, data_len); 583 padding = len - offsetof(typeof(*event), event_data_flex) - data_len; 584 memset(event->event_data_flex + data_len, 0, padding); 585 586 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, 587 GFP_KERNEL); 588 return; 589 590 send_fail_skb: 591 kfree_skb(skb); 592 send_fail: 593 name = get_fc_host_event_code_name(event_code); 594 printk(KERN_WARNING 595 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", 596 __func__, shost->host_no, 597 (name) ? name : "<unknown>", 598 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err); 599 return; 600 } 601 EXPORT_SYMBOL(fc_host_post_fc_event); 602 603 /** 604 * fc_host_post_event - called to post an even on an fc_host. 605 * @shost: host the event occurred on 606 * @event_number: fc event number obtained from get_fc_event_number() 607 * @event_code: fc_host event being posted 608 * @event_data: 32bits of data for the event being posted 609 * 610 * Notes: 611 * This routine assumes no locks are held on entry. 612 */ 613 void fc_host_post_event(struct Scsi_Host * shost,u32 event_number,enum fc_host_event_code event_code,u32 event_data)614 fc_host_post_event(struct Scsi_Host *shost, u32 event_number, 615 enum fc_host_event_code event_code, u32 event_data) 616 { 617 fc_host_post_fc_event(shost, event_number, event_code, 618 (u32)sizeof(u32), (char *)&event_data, 0); 619 } 620 EXPORT_SYMBOL(fc_host_post_event); 621 622 623 /** 624 * fc_host_post_vendor_event - called to post a vendor unique event 625 * on an fc_host 626 * @shost: host the event occurred on 627 * @event_number: fc event number obtained from get_fc_event_number() 628 * @data_len: amount, in bytes, of vendor unique data 629 * @data_buf: pointer to vendor unique data 630 * @vendor_id: Vendor id 631 * 632 * Notes: 633 * This routine assumes no locks are held on entry. 634 */ 635 void fc_host_post_vendor_event(struct Scsi_Host * shost,u32 event_number,u32 data_len,char * data_buf,u64 vendor_id)636 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, 637 u32 data_len, char * data_buf, u64 vendor_id) 638 { 639 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE, 640 data_len, data_buf, vendor_id); 641 } 642 EXPORT_SYMBOL(fc_host_post_vendor_event); 643 644 /** 645 * fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn 646 * @shost: host the fc_rport is associated with 647 * @wwpn: wwpn of the fc_rport device 648 * 649 * Notes: 650 * This routine assumes no locks are held on entry. 651 */ 652 struct fc_rport * fc_find_rport_by_wwpn(struct Scsi_Host * shost,u64 wwpn)653 fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn) 654 { 655 struct fc_rport *rport; 656 unsigned long flags; 657 658 spin_lock_irqsave(shost->host_lock, flags); 659 660 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 661 if (rport->port_state != FC_PORTSTATE_ONLINE) 662 continue; 663 664 if (rport->port_name == wwpn) { 665 spin_unlock_irqrestore(shost->host_lock, flags); 666 return rport; 667 } 668 } 669 670 spin_unlock_irqrestore(shost->host_lock, flags); 671 return NULL; 672 } 673 EXPORT_SYMBOL(fc_find_rport_by_wwpn); 674 675 static void fc_li_stats_update(u16 event_type,struct fc_fpin_stats * stats)676 fc_li_stats_update(u16 event_type, 677 struct fc_fpin_stats *stats) 678 { 679 stats->li++; 680 switch (event_type) { 681 case FPIN_LI_UNKNOWN: 682 stats->li_failure_unknown++; 683 break; 684 case FPIN_LI_LINK_FAILURE: 685 stats->li_link_failure_count++; 686 break; 687 case FPIN_LI_LOSS_OF_SYNC: 688 stats->li_loss_of_sync_count++; 689 break; 690 case FPIN_LI_LOSS_OF_SIG: 691 stats->li_loss_of_signals_count++; 692 break; 693 case FPIN_LI_PRIM_SEQ_ERR: 694 stats->li_prim_seq_err_count++; 695 break; 696 case FPIN_LI_INVALID_TX_WD: 697 stats->li_invalid_tx_word_count++; 698 break; 699 case FPIN_LI_INVALID_CRC: 700 stats->li_invalid_crc_count++; 701 break; 702 case FPIN_LI_DEVICE_SPEC: 703 stats->li_device_specific++; 704 break; 705 } 706 } 707 708 static void fc_delivery_stats_update(u32 reason_code,struct fc_fpin_stats * stats)709 fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats) 710 { 711 stats->dn++; 712 switch (reason_code) { 713 case FPIN_DELI_UNKNOWN: 714 stats->dn_unknown++; 715 break; 716 case FPIN_DELI_TIMEOUT: 717 stats->dn_timeout++; 718 break; 719 case FPIN_DELI_UNABLE_TO_ROUTE: 720 stats->dn_unable_to_route++; 721 break; 722 case FPIN_DELI_DEVICE_SPEC: 723 stats->dn_device_specific++; 724 break; 725 } 726 } 727 728 static void fc_cn_stats_update(u16 event_type,struct fc_fpin_stats * stats)729 fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats) 730 { 731 stats->cn++; 732 switch (event_type) { 733 case FPIN_CONGN_CLEAR: 734 stats->cn_clear++; 735 break; 736 case FPIN_CONGN_LOST_CREDIT: 737 stats->cn_lost_credit++; 738 break; 739 case FPIN_CONGN_CREDIT_STALL: 740 stats->cn_credit_stall++; 741 break; 742 case FPIN_CONGN_OVERSUBSCRIPTION: 743 stats->cn_oversubscription++; 744 break; 745 case FPIN_CONGN_DEVICE_SPEC: 746 stats->cn_device_specific++; 747 } 748 } 749 750 /* 751 * fc_fpin_li_stats_update - routine to update Link Integrity 752 * event statistics. 753 * @shost: host the FPIN was received on 754 * @tlv: pointer to link integrity descriptor 755 * 756 */ 757 static void fc_fpin_li_stats_update(struct Scsi_Host * shost,struct fc_tlv_desc * tlv)758 fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv) 759 { 760 u8 i; 761 struct fc_rport *rport = NULL; 762 struct fc_rport *attach_rport = NULL; 763 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 764 struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv; 765 u16 event_type = be16_to_cpu(li_desc->event_type); 766 u64 wwpn; 767 768 rport = fc_find_rport_by_wwpn(shost, 769 be64_to_cpu(li_desc->attached_wwpn)); 770 if (rport && 771 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 772 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 773 attach_rport = rport; 774 fc_li_stats_update(event_type, &attach_rport->fpin_stats); 775 } 776 777 if (be32_to_cpu(li_desc->pname_count) > 0) { 778 for (i = 0; 779 i < be32_to_cpu(li_desc->pname_count); 780 i++) { 781 wwpn = be64_to_cpu(li_desc->pname_list[i]); 782 rport = fc_find_rport_by_wwpn(shost, wwpn); 783 if (rport && 784 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 785 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 786 if (rport == attach_rport) 787 continue; 788 fc_li_stats_update(event_type, 789 &rport->fpin_stats); 790 } 791 } 792 } 793 794 if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn)) 795 fc_li_stats_update(event_type, &fc_host->fpin_stats); 796 } 797 798 /* 799 * fc_fpin_delivery_stats_update - routine to update Delivery Notification 800 * event statistics. 801 * @shost: host the FPIN was received on 802 * @tlv: pointer to delivery descriptor 803 * 804 */ 805 static void fc_fpin_delivery_stats_update(struct Scsi_Host * shost,struct fc_tlv_desc * tlv)806 fc_fpin_delivery_stats_update(struct Scsi_Host *shost, 807 struct fc_tlv_desc *tlv) 808 { 809 struct fc_rport *rport = NULL; 810 struct fc_rport *attach_rport = NULL; 811 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 812 struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv; 813 u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code); 814 815 rport = fc_find_rport_by_wwpn(shost, 816 be64_to_cpu(dn_desc->attached_wwpn)); 817 if (rport && 818 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 819 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 820 attach_rport = rport; 821 fc_delivery_stats_update(reason_code, 822 &attach_rport->fpin_stats); 823 } 824 825 if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn)) 826 fc_delivery_stats_update(reason_code, &fc_host->fpin_stats); 827 } 828 829 /* 830 * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion 831 * event statistics. 832 * @shost: host the FPIN was received on 833 * @tlv: pointer to peer congestion descriptor 834 * 835 */ 836 static void fc_fpin_peer_congn_stats_update(struct Scsi_Host * shost,struct fc_tlv_desc * tlv)837 fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost, 838 struct fc_tlv_desc *tlv) 839 { 840 u8 i; 841 struct fc_rport *rport = NULL; 842 struct fc_rport *attach_rport = NULL; 843 struct fc_fn_peer_congn_desc *pc_desc = 844 (struct fc_fn_peer_congn_desc *)tlv; 845 u16 event_type = be16_to_cpu(pc_desc->event_type); 846 u64 wwpn; 847 848 rport = fc_find_rport_by_wwpn(shost, 849 be64_to_cpu(pc_desc->attached_wwpn)); 850 if (rport && 851 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 852 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 853 attach_rport = rport; 854 fc_cn_stats_update(event_type, &attach_rport->fpin_stats); 855 } 856 857 if (be32_to_cpu(pc_desc->pname_count) > 0) { 858 for (i = 0; 859 i < be32_to_cpu(pc_desc->pname_count); 860 i++) { 861 wwpn = be64_to_cpu(pc_desc->pname_list[i]); 862 rport = fc_find_rport_by_wwpn(shost, wwpn); 863 if (rport && 864 (rport->roles & FC_PORT_ROLE_FCP_TARGET || 865 rport->roles & FC_PORT_ROLE_NVME_TARGET)) { 866 if (rport == attach_rport) 867 continue; 868 fc_cn_stats_update(event_type, 869 &rport->fpin_stats); 870 } 871 } 872 } 873 } 874 875 /* 876 * fc_fpin_congn_stats_update - routine to update Congestion 877 * event statistics. 878 * @shost: host the FPIN was received on 879 * @tlv: pointer to congestion descriptor 880 * 881 */ 882 static void fc_fpin_congn_stats_update(struct Scsi_Host * shost,struct fc_tlv_desc * tlv)883 fc_fpin_congn_stats_update(struct Scsi_Host *shost, 884 struct fc_tlv_desc *tlv) 885 { 886 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 887 struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv; 888 889 fc_cn_stats_update(be16_to_cpu(congn->event_type), 890 &fc_host->fpin_stats); 891 } 892 893 /** 894 * fc_host_fpin_rcv - routine to process a received FPIN. 895 * @shost: host the FPIN was received on 896 * @fpin_len: length of FPIN payload, in bytes 897 * @fpin_buf: pointer to FPIN payload 898 * @event_acknowledge: 1, if LLDD handles this event. 899 * Notes: 900 * This routine assumes no locks are held on entry. 901 */ 902 void fc_host_fpin_rcv(struct Scsi_Host * shost,u32 fpin_len,char * fpin_buf,u8 event_acknowledge)903 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf, 904 u8 event_acknowledge) 905 { 906 struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf; 907 struct fc_tlv_desc *tlv; 908 u32 bytes_remain; 909 u32 dtag; 910 enum fc_host_event_code event_code = 911 event_acknowledge ? FCH_EVT_LINK_FPIN_ACK : FCH_EVT_LINK_FPIN; 912 913 /* Update Statistics */ 914 tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0]; 915 bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc); 916 bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len)); 917 918 while (bytes_remain >= FC_TLV_DESC_HDR_SZ && 919 bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) { 920 dtag = be32_to_cpu(tlv->desc_tag); 921 switch (dtag) { 922 case ELS_DTAG_LNK_INTEGRITY: 923 fc_fpin_li_stats_update(shost, tlv); 924 break; 925 case ELS_DTAG_DELIVERY: 926 fc_fpin_delivery_stats_update(shost, tlv); 927 break; 928 case ELS_DTAG_PEER_CONGEST: 929 fc_fpin_peer_congn_stats_update(shost, tlv); 930 break; 931 case ELS_DTAG_CONGESTION: 932 fc_fpin_congn_stats_update(shost, tlv); 933 } 934 935 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv); 936 tlv = fc_tlv_next_desc(tlv); 937 } 938 939 fc_host_post_fc_event(shost, fc_get_event_number(), 940 event_code, fpin_len, fpin_buf, 0); 941 } 942 EXPORT_SYMBOL(fc_host_fpin_rcv); 943 944 fc_transport_init(void)945 static __init int fc_transport_init(void) 946 { 947 int error; 948 949 atomic_set(&fc_event_seq, 0); 950 951 error = transport_class_register(&fc_host_class); 952 if (error) 953 return error; 954 error = transport_class_register(&fc_vport_class); 955 if (error) 956 goto unreg_host_class; 957 error = transport_class_register(&fc_rport_class); 958 if (error) 959 goto unreg_vport_class; 960 error = transport_class_register(&fc_transport_class); 961 if (error) 962 goto unreg_rport_class; 963 return 0; 964 965 unreg_rport_class: 966 transport_class_unregister(&fc_rport_class); 967 unreg_vport_class: 968 transport_class_unregister(&fc_vport_class); 969 unreg_host_class: 970 transport_class_unregister(&fc_host_class); 971 return error; 972 } 973 fc_transport_exit(void)974 static void __exit fc_transport_exit(void) 975 { 976 transport_class_unregister(&fc_transport_class); 977 transport_class_unregister(&fc_rport_class); 978 transport_class_unregister(&fc_host_class); 979 transport_class_unregister(&fc_vport_class); 980 } 981 982 /* 983 * FC Remote Port Attribute Management 984 */ 985 986 #define fc_rport_show_function(field, format_string, sz, cast) \ 987 static ssize_t \ 988 show_fc_rport_##field (struct device *dev, \ 989 struct device_attribute *attr, char *buf) \ 990 { \ 991 struct fc_rport *rport = transport_class_to_rport(dev); \ 992 struct Scsi_Host *shost = rport_to_shost(rport); \ 993 struct fc_internal *i = to_fc_internal(shost->transportt); \ 994 if ((i->f->get_rport_##field) && \ 995 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 996 (rport->port_state == FC_PORTSTATE_DELETED) || \ 997 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ 998 i->f->get_rport_##field(rport); \ 999 return snprintf(buf, sz, format_string, cast rport->field); \ 1000 } 1001 1002 #define fc_rport_store_function(field) \ 1003 static ssize_t \ 1004 store_fc_rport_##field(struct device *dev, \ 1005 struct device_attribute *attr, \ 1006 const char *buf, size_t count) \ 1007 { \ 1008 int val; \ 1009 struct fc_rport *rport = transport_class_to_rport(dev); \ 1010 struct Scsi_Host *shost = rport_to_shost(rport); \ 1011 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1012 char *cp; \ 1013 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ 1014 (rport->port_state == FC_PORTSTATE_DELETED) || \ 1015 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ 1016 return -EBUSY; \ 1017 val = simple_strtoul(buf, &cp, 0); \ 1018 if (*cp && (*cp != '\n')) \ 1019 return -EINVAL; \ 1020 i->f->set_rport_##field(rport, val); \ 1021 return count; \ 1022 } 1023 1024 #define fc_rport_rd_attr(field, format_string, sz) \ 1025 fc_rport_show_function(field, format_string, sz, ) \ 1026 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1027 show_fc_rport_##field, NULL) 1028 1029 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ 1030 fc_rport_show_function(field, format_string, sz, (cast)) \ 1031 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1032 show_fc_rport_##field, NULL) 1033 1034 #define fc_rport_rw_attr(field, format_string, sz) \ 1035 fc_rport_show_function(field, format_string, sz, ) \ 1036 fc_rport_store_function(field) \ 1037 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ 1038 show_fc_rport_##field, \ 1039 store_fc_rport_##field) 1040 1041 1042 #define fc_private_rport_show_function(field, format_string, sz, cast) \ 1043 static ssize_t \ 1044 show_fc_rport_##field (struct device *dev, \ 1045 struct device_attribute *attr, char *buf) \ 1046 { \ 1047 struct fc_rport *rport = transport_class_to_rport(dev); \ 1048 return snprintf(buf, sz, format_string, cast rport->field); \ 1049 } 1050 1051 #define fc_private_rport_rd_attr(field, format_string, sz) \ 1052 fc_private_rport_show_function(field, format_string, sz, ) \ 1053 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1054 show_fc_rport_##field, NULL) 1055 1056 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ 1057 fc_private_rport_show_function(field, format_string, sz, (cast)) \ 1058 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ 1059 show_fc_rport_##field, NULL) 1060 1061 1062 #define fc_private_rport_rd_enum_attr(title, maxlen) \ 1063 static ssize_t \ 1064 show_fc_rport_##title (struct device *dev, \ 1065 struct device_attribute *attr, char *buf) \ 1066 { \ 1067 struct fc_rport *rport = transport_class_to_rport(dev); \ 1068 const char *name; \ 1069 name = get_fc_##title##_name(rport->title); \ 1070 if (!name) \ 1071 return -EINVAL; \ 1072 return snprintf(buf, maxlen, "%s\n", name); \ 1073 } \ 1074 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ 1075 show_fc_rport_##title, NULL) 1076 1077 1078 #define SETUP_RPORT_ATTRIBUTE_RD(field) \ 1079 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1080 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 1081 i->private_rport_attrs[count].store = NULL; \ 1082 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1083 if (i->f->show_rport_##field) \ 1084 count++ 1085 1086 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ 1087 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1088 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 1089 i->private_rport_attrs[count].store = NULL; \ 1090 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1091 count++ 1092 1093 #define SETUP_RPORT_ATTRIBUTE_RW(field) \ 1094 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1095 if (!i->f->set_rport_##field) { \ 1096 i->private_rport_attrs[count].attr.mode = S_IRUGO; \ 1097 i->private_rport_attrs[count].store = NULL; \ 1098 } \ 1099 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1100 if (i->f->show_rport_##field) \ 1101 count++ 1102 1103 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ 1104 { \ 1105 i->private_rport_attrs[count] = device_attr_rport_##field; \ 1106 i->rport_attrs[count] = &i->private_rport_attrs[count]; \ 1107 count++; \ 1108 } 1109 1110 1111 /* The FC Transport Remote Port Attributes: */ 1112 1113 /* Fixed Remote Port Attributes */ 1114 1115 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); 1116 1117 static ssize_t show_fc_rport_supported_classes(struct device * dev,struct device_attribute * attr,char * buf)1118 show_fc_rport_supported_classes (struct device *dev, 1119 struct device_attribute *attr, char *buf) 1120 { 1121 struct fc_rport *rport = transport_class_to_rport(dev); 1122 if (rport->supported_classes == FC_COS_UNSPECIFIED) 1123 return snprintf(buf, 20, "unspecified\n"); 1124 return get_fc_cos_names(rport->supported_classes, buf); 1125 } 1126 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, 1127 show_fc_rport_supported_classes, NULL); 1128 1129 /* Dynamic Remote Port Attributes */ 1130 1131 /* 1132 * dev_loss_tmo attribute 1133 */ fc_str_to_dev_loss(const char * buf,unsigned long * val)1134 static int fc_str_to_dev_loss(const char *buf, unsigned long *val) 1135 { 1136 char *cp; 1137 1138 *val = simple_strtoul(buf, &cp, 0); 1139 if (*cp && (*cp != '\n')) 1140 return -EINVAL; 1141 /* 1142 * Check for overflow; dev_loss_tmo is u32 1143 */ 1144 if (*val > UINT_MAX) 1145 return -EINVAL; 1146 1147 return 0; 1148 } 1149 fc_rport_set_dev_loss_tmo(struct fc_rport * rport,unsigned long val)1150 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, 1151 unsigned long val) 1152 { 1153 struct Scsi_Host *shost = rport_to_shost(rport); 1154 struct fc_internal *i = to_fc_internal(shost->transportt); 1155 1156 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 1157 (rport->port_state == FC_PORTSTATE_DELETED) || 1158 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 1159 return -EBUSY; 1160 /* 1161 * Check for overflow; dev_loss_tmo is u32 1162 */ 1163 if (val > UINT_MAX) 1164 return -EINVAL; 1165 1166 /* 1167 * If fast_io_fail is off we have to cap 1168 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT 1169 */ 1170 if (rport->fast_io_fail_tmo == -1 && 1171 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) 1172 return -EINVAL; 1173 1174 i->f->set_rport_dev_loss_tmo(rport, val); 1175 return 0; 1176 } 1177 1178 fc_rport_show_function(dev_loss_tmo, "%u\n", 20, ) 1179 static ssize_t store_fc_rport_dev_loss_tmo(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1180 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, 1181 const char *buf, size_t count) 1182 { 1183 struct fc_rport *rport = transport_class_to_rport(dev); 1184 unsigned long val; 1185 int rc; 1186 1187 rc = fc_str_to_dev_loss(buf, &val); 1188 if (rc) 1189 return rc; 1190 1191 rc = fc_rport_set_dev_loss_tmo(rport, val); 1192 if (rc) 1193 return rc; 1194 return count; 1195 } 1196 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, 1197 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); 1198 1199 1200 /* Private Remote Port Attributes */ 1201 1202 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1203 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1204 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); 1205 1206 static ssize_t show_fc_rport_roles(struct device * dev,struct device_attribute * attr,char * buf)1207 show_fc_rport_roles (struct device *dev, struct device_attribute *attr, 1208 char *buf) 1209 { 1210 struct fc_rport *rport = transport_class_to_rport(dev); 1211 1212 /* identify any roles that are port_id specific */ 1213 if ((rport->port_id != -1) && 1214 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == 1215 FC_WELLKNOWN_PORTID_MASK) { 1216 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { 1217 case FC_FPORT_PORTID: 1218 return snprintf(buf, 30, "Fabric Port\n"); 1219 case FC_FABCTLR_PORTID: 1220 return snprintf(buf, 30, "Fabric Controller\n"); 1221 case FC_DIRSRVR_PORTID: 1222 return snprintf(buf, 30, "Directory Server\n"); 1223 case FC_TIMESRVR_PORTID: 1224 return snprintf(buf, 30, "Time Server\n"); 1225 case FC_MGMTSRVR_PORTID: 1226 return snprintf(buf, 30, "Management Server\n"); 1227 default: 1228 return snprintf(buf, 30, "Unknown Fabric Entity\n"); 1229 } 1230 } else { 1231 if (rport->roles == FC_PORT_ROLE_UNKNOWN) 1232 return snprintf(buf, 20, "unknown\n"); 1233 return get_fc_port_roles_names(rport->roles, buf); 1234 } 1235 } 1236 static FC_DEVICE_ATTR(rport, roles, S_IRUGO, 1237 show_fc_rport_roles, NULL); 1238 fc_rport_set_marginal_state(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1239 static ssize_t fc_rport_set_marginal_state(struct device *dev, 1240 struct device_attribute *attr, 1241 const char *buf, size_t count) 1242 { 1243 struct fc_rport *rport = transport_class_to_rport(dev); 1244 enum fc_port_state port_state; 1245 int ret = 0; 1246 1247 ret = get_fc_port_state_match(buf, &port_state); 1248 if (ret) 1249 return -EINVAL; 1250 if (port_state == FC_PORTSTATE_MARGINAL) { 1251 /* 1252 * Change the state to Marginal only if the 1253 * current rport state is Online 1254 * Allow only Online->Marginal 1255 */ 1256 if (rport->port_state == FC_PORTSTATE_ONLINE) 1257 rport->port_state = port_state; 1258 else if (port_state != rport->port_state) 1259 return -EINVAL; 1260 } else if (port_state == FC_PORTSTATE_ONLINE) { 1261 /* 1262 * Change the state to Online only if the 1263 * current rport state is Marginal 1264 * Allow only Marginal->Online 1265 */ 1266 if (rport->port_state == FC_PORTSTATE_MARGINAL) 1267 rport->port_state = port_state; 1268 else if (port_state != rport->port_state) 1269 return -EINVAL; 1270 } else 1271 return -EINVAL; 1272 return count; 1273 } 1274 1275 static ssize_t show_fc_rport_port_state(struct device * dev,struct device_attribute * attr,char * buf)1276 show_fc_rport_port_state(struct device *dev, 1277 struct device_attribute *attr, char *buf) 1278 { 1279 const char *name; 1280 struct fc_rport *rport = transport_class_to_rport(dev); 1281 1282 name = get_fc_port_state_name(rport->port_state); 1283 if (!name) 1284 return -EINVAL; 1285 1286 return snprintf(buf, 20, "%s\n", name); 1287 } 1288 1289 static FC_DEVICE_ATTR(rport, port_state, 0444 | 0200, 1290 show_fc_rport_port_state, fc_rport_set_marginal_state); 1291 1292 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); 1293 1294 /* 1295 * fast_io_fail_tmo attribute 1296 */ 1297 static ssize_t show_fc_rport_fast_io_fail_tmo(struct device * dev,struct device_attribute * attr,char * buf)1298 show_fc_rport_fast_io_fail_tmo (struct device *dev, 1299 struct device_attribute *attr, char *buf) 1300 { 1301 struct fc_rport *rport = transport_class_to_rport(dev); 1302 1303 if (rport->fast_io_fail_tmo == -1) 1304 return snprintf(buf, 5, "off\n"); 1305 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); 1306 } 1307 1308 static ssize_t store_fc_rport_fast_io_fail_tmo(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1309 store_fc_rport_fast_io_fail_tmo(struct device *dev, 1310 struct device_attribute *attr, const char *buf, 1311 size_t count) 1312 { 1313 int val; 1314 char *cp; 1315 struct fc_rport *rport = transport_class_to_rport(dev); 1316 1317 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || 1318 (rport->port_state == FC_PORTSTATE_DELETED) || 1319 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) 1320 return -EBUSY; 1321 if (strncmp(buf, "off", 3) == 0) 1322 rport->fast_io_fail_tmo = -1; 1323 else { 1324 val = simple_strtoul(buf, &cp, 0); 1325 if ((*cp && (*cp != '\n')) || (val < 0)) 1326 return -EINVAL; 1327 /* 1328 * Cap fast_io_fail by dev_loss_tmo or 1329 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. 1330 */ 1331 if ((val >= rport->dev_loss_tmo) || 1332 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) 1333 return -EINVAL; 1334 1335 rport->fast_io_fail_tmo = val; 1336 } 1337 return count; 1338 } 1339 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, 1340 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); 1341 1342 #define fc_rport_fpin_statistic(name) \ 1343 static ssize_t fc_rport_fpinstat_##name(struct device *cd, \ 1344 struct device_attribute *attr, \ 1345 char *buf) \ 1346 { \ 1347 struct fc_rport *rport = transport_class_to_rport(cd); \ 1348 \ 1349 return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \ 1350 } \ 1351 static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL) 1352 1353 fc_rport_fpin_statistic(dn); 1354 fc_rport_fpin_statistic(dn_unknown); 1355 fc_rport_fpin_statistic(dn_timeout); 1356 fc_rport_fpin_statistic(dn_unable_to_route); 1357 fc_rport_fpin_statistic(dn_device_specific); 1358 fc_rport_fpin_statistic(cn); 1359 fc_rport_fpin_statistic(cn_clear); 1360 fc_rport_fpin_statistic(cn_lost_credit); 1361 fc_rport_fpin_statistic(cn_credit_stall); 1362 fc_rport_fpin_statistic(cn_oversubscription); 1363 fc_rport_fpin_statistic(cn_device_specific); 1364 fc_rport_fpin_statistic(li); 1365 fc_rport_fpin_statistic(li_failure_unknown); 1366 fc_rport_fpin_statistic(li_link_failure_count); 1367 fc_rport_fpin_statistic(li_loss_of_sync_count); 1368 fc_rport_fpin_statistic(li_loss_of_signals_count); 1369 fc_rport_fpin_statistic(li_prim_seq_err_count); 1370 fc_rport_fpin_statistic(li_invalid_tx_word_count); 1371 fc_rport_fpin_statistic(li_invalid_crc_count); 1372 fc_rport_fpin_statistic(li_device_specific); 1373 1374 static struct attribute *fc_rport_statistics_attrs[] = { 1375 &device_attr_rport_fpin_dn.attr, 1376 &device_attr_rport_fpin_dn_unknown.attr, 1377 &device_attr_rport_fpin_dn_timeout.attr, 1378 &device_attr_rport_fpin_dn_unable_to_route.attr, 1379 &device_attr_rport_fpin_dn_device_specific.attr, 1380 &device_attr_rport_fpin_li.attr, 1381 &device_attr_rport_fpin_li_failure_unknown.attr, 1382 &device_attr_rport_fpin_li_link_failure_count.attr, 1383 &device_attr_rport_fpin_li_loss_of_sync_count.attr, 1384 &device_attr_rport_fpin_li_loss_of_signals_count.attr, 1385 &device_attr_rport_fpin_li_prim_seq_err_count.attr, 1386 &device_attr_rport_fpin_li_invalid_tx_word_count.attr, 1387 &device_attr_rport_fpin_li_invalid_crc_count.attr, 1388 &device_attr_rport_fpin_li_device_specific.attr, 1389 &device_attr_rport_fpin_cn.attr, 1390 &device_attr_rport_fpin_cn_clear.attr, 1391 &device_attr_rport_fpin_cn_lost_credit.attr, 1392 &device_attr_rport_fpin_cn_credit_stall.attr, 1393 &device_attr_rport_fpin_cn_oversubscription.attr, 1394 &device_attr_rport_fpin_cn_device_specific.attr, 1395 NULL 1396 }; 1397 1398 static struct attribute_group fc_rport_statistics_group = { 1399 .name = "statistics", 1400 .attrs = fc_rport_statistics_attrs, 1401 }; 1402 1403 1404 /* 1405 * FC SCSI Target Attribute Management 1406 */ 1407 1408 /* 1409 * Note: in the target show function we recognize when the remote 1410 * port is in the hierarchy and do not allow the driver to get 1411 * involved in sysfs functions. The driver only gets involved if 1412 * it's the "old" style that doesn't use rports. 1413 */ 1414 #define fc_starget_show_function(field, format_string, sz, cast) \ 1415 static ssize_t \ 1416 show_fc_starget_##field (struct device *dev, \ 1417 struct device_attribute *attr, char *buf) \ 1418 { \ 1419 struct scsi_target *starget = transport_class_to_starget(dev); \ 1420 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ 1421 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1422 struct fc_rport *rport = starget_to_rport(starget); \ 1423 if (rport) \ 1424 fc_starget_##field(starget) = rport->field; \ 1425 else if (i->f->get_starget_##field) \ 1426 i->f->get_starget_##field(starget); \ 1427 return snprintf(buf, sz, format_string, \ 1428 cast fc_starget_##field(starget)); \ 1429 } 1430 1431 #define fc_starget_rd_attr(field, format_string, sz) \ 1432 fc_starget_show_function(field, format_string, sz, ) \ 1433 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1434 show_fc_starget_##field, NULL) 1435 1436 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ 1437 fc_starget_show_function(field, format_string, sz, (cast)) \ 1438 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ 1439 show_fc_starget_##field, NULL) 1440 1441 #define SETUP_STARGET_ATTRIBUTE_RD(field) \ 1442 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1443 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1444 i->private_starget_attrs[count].store = NULL; \ 1445 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1446 if (i->f->show_starget_##field) \ 1447 count++ 1448 1449 #define SETUP_STARGET_ATTRIBUTE_RW(field) \ 1450 i->private_starget_attrs[count] = device_attr_starget_##field; \ 1451 if (!i->f->set_starget_##field) { \ 1452 i->private_starget_attrs[count].attr.mode = S_IRUGO; \ 1453 i->private_starget_attrs[count].store = NULL; \ 1454 } \ 1455 i->starget_attrs[count] = &i->private_starget_attrs[count]; \ 1456 if (i->f->show_starget_##field) \ 1457 count++ 1458 1459 /* The FC Transport SCSI Target Attributes: */ 1460 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1461 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1462 fc_starget_rd_attr(port_id, "0x%06x\n", 20); 1463 1464 1465 /* 1466 * FC Virtual Port Attribute Management 1467 */ 1468 1469 #define fc_vport_show_function(field, format_string, sz, cast) \ 1470 static ssize_t \ 1471 show_fc_vport_##field (struct device *dev, \ 1472 struct device_attribute *attr, char *buf) \ 1473 { \ 1474 struct fc_vport *vport = transport_class_to_vport(dev); \ 1475 struct Scsi_Host *shost = vport_to_shost(vport); \ 1476 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1477 if ((i->f->get_vport_##field) && \ 1478 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ 1479 i->f->get_vport_##field(vport); \ 1480 return snprintf(buf, sz, format_string, cast vport->field); \ 1481 } 1482 1483 #define fc_vport_store_function(field) \ 1484 static ssize_t \ 1485 store_fc_vport_##field(struct device *dev, \ 1486 struct device_attribute *attr, \ 1487 const char *buf, size_t count) \ 1488 { \ 1489 int val; \ 1490 struct fc_vport *vport = transport_class_to_vport(dev); \ 1491 struct Scsi_Host *shost = vport_to_shost(vport); \ 1492 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1493 char *cp; \ 1494 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1495 return -EBUSY; \ 1496 val = simple_strtoul(buf, &cp, 0); \ 1497 if (*cp && (*cp != '\n')) \ 1498 return -EINVAL; \ 1499 i->f->set_vport_##field(vport, val); \ 1500 return count; \ 1501 } 1502 1503 #define fc_vport_store_str_function(field, slen) \ 1504 static ssize_t \ 1505 store_fc_vport_##field(struct device *dev, \ 1506 struct device_attribute *attr, \ 1507 const char *buf, size_t count) \ 1508 { \ 1509 struct fc_vport *vport = transport_class_to_vport(dev); \ 1510 struct Scsi_Host *shost = vport_to_shost(vport); \ 1511 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1512 unsigned int cnt=count; \ 1513 \ 1514 /* count may include a LF at end of string */ \ 1515 if (buf[cnt-1] == '\n') \ 1516 cnt--; \ 1517 if (cnt > ((slen) - 1)) \ 1518 return -EINVAL; \ 1519 memcpy(vport->field, buf, cnt); \ 1520 i->f->set_vport_##field(vport); \ 1521 return count; \ 1522 } 1523 1524 #define fc_vport_rd_attr(field, format_string, sz) \ 1525 fc_vport_show_function(field, format_string, sz, ) \ 1526 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1527 show_fc_vport_##field, NULL) 1528 1529 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ 1530 fc_vport_show_function(field, format_string, sz, (cast)) \ 1531 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1532 show_fc_vport_##field, NULL) 1533 1534 #define fc_vport_rw_attr(field, format_string, sz) \ 1535 fc_vport_show_function(field, format_string, sz, ) \ 1536 fc_vport_store_function(field) \ 1537 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1538 show_fc_vport_##field, \ 1539 store_fc_vport_##field) 1540 1541 #define fc_private_vport_show_function(field, format_string, sz, cast) \ 1542 static ssize_t \ 1543 show_fc_vport_##field (struct device *dev, \ 1544 struct device_attribute *attr, char *buf) \ 1545 { \ 1546 struct fc_vport *vport = transport_class_to_vport(dev); \ 1547 return snprintf(buf, sz, format_string, cast vport->field); \ 1548 } 1549 1550 #define fc_private_vport_store_u32_function(field) \ 1551 static ssize_t \ 1552 store_fc_vport_##field(struct device *dev, \ 1553 struct device_attribute *attr, \ 1554 const char *buf, size_t count) \ 1555 { \ 1556 u32 val; \ 1557 struct fc_vport *vport = transport_class_to_vport(dev); \ 1558 char *cp; \ 1559 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ 1560 return -EBUSY; \ 1561 val = simple_strtoul(buf, &cp, 0); \ 1562 if (*cp && (*cp != '\n')) \ 1563 return -EINVAL; \ 1564 vport->field = val; \ 1565 return count; \ 1566 } 1567 1568 1569 #define fc_private_vport_rd_attr(field, format_string, sz) \ 1570 fc_private_vport_show_function(field, format_string, sz, ) \ 1571 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1572 show_fc_vport_##field, NULL) 1573 1574 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ 1575 fc_private_vport_show_function(field, format_string, sz, (cast)) \ 1576 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ 1577 show_fc_vport_##field, NULL) 1578 1579 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ 1580 fc_private_vport_show_function(field, format_string, sz, ) \ 1581 fc_private_vport_store_u32_function(field) \ 1582 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ 1583 show_fc_vport_##field, \ 1584 store_fc_vport_##field) 1585 1586 1587 #define fc_private_vport_rd_enum_attr(title, maxlen) \ 1588 static ssize_t \ 1589 show_fc_vport_##title (struct device *dev, \ 1590 struct device_attribute *attr, \ 1591 char *buf) \ 1592 { \ 1593 struct fc_vport *vport = transport_class_to_vport(dev); \ 1594 const char *name; \ 1595 name = get_fc_##title##_name(vport->title); \ 1596 if (!name) \ 1597 return -EINVAL; \ 1598 return snprintf(buf, maxlen, "%s\n", name); \ 1599 } \ 1600 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ 1601 show_fc_vport_##title, NULL) 1602 1603 1604 #define SETUP_VPORT_ATTRIBUTE_RD(field) \ 1605 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1606 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1607 i->private_vport_attrs[count].store = NULL; \ 1608 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1609 if (i->f->get_##field) \ 1610 count++ 1611 /* NOTE: Above MACRO differs: checks function not show bit */ 1612 1613 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ 1614 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1615 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1616 i->private_vport_attrs[count].store = NULL; \ 1617 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1618 count++ 1619 1620 #define SETUP_VPORT_ATTRIBUTE_WR(field) \ 1621 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1622 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1623 if (i->f->field) \ 1624 count++ 1625 /* NOTE: Above MACRO differs: checks function */ 1626 1627 #define SETUP_VPORT_ATTRIBUTE_RW(field) \ 1628 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1629 if (!i->f->set_vport_##field) { \ 1630 i->private_vport_attrs[count].attr.mode = S_IRUGO; \ 1631 i->private_vport_attrs[count].store = NULL; \ 1632 } \ 1633 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1634 count++ 1635 /* NOTE: Above MACRO differs: does not check show bit */ 1636 1637 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ 1638 { \ 1639 i->private_vport_attrs[count] = device_attr_vport_##field; \ 1640 i->vport_attrs[count] = &i->private_vport_attrs[count]; \ 1641 count++; \ 1642 } 1643 1644 1645 /* The FC Transport Virtual Port Attributes: */ 1646 1647 /* Fixed Virtual Port Attributes */ 1648 1649 /* Dynamic Virtual Port Attributes */ 1650 1651 /* Private Virtual Port Attributes */ 1652 1653 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); 1654 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); 1655 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1656 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1657 1658 static ssize_t show_fc_vport_roles(struct device * dev,struct device_attribute * attr,char * buf)1659 show_fc_vport_roles (struct device *dev, struct device_attribute *attr, 1660 char *buf) 1661 { 1662 struct fc_vport *vport = transport_class_to_vport(dev); 1663 1664 if (vport->roles == FC_PORT_ROLE_UNKNOWN) 1665 return snprintf(buf, 20, "unknown\n"); 1666 return get_fc_port_roles_names(vport->roles, buf); 1667 } 1668 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); 1669 1670 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); 1671 1672 fc_private_vport_show_function(symbolic_name, "%s\n", 1673 FC_VPORT_SYMBOLIC_NAMELEN + 1, ) 1674 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) 1675 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, 1676 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); 1677 1678 static ssize_t store_fc_vport_delete(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1679 store_fc_vport_delete(struct device *dev, struct device_attribute *attr, 1680 const char *buf, size_t count) 1681 { 1682 struct fc_vport *vport = transport_class_to_vport(dev); 1683 struct Scsi_Host *shost = vport_to_shost(vport); 1684 unsigned long flags; 1685 1686 spin_lock_irqsave(shost->host_lock, flags); 1687 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 1688 spin_unlock_irqrestore(shost->host_lock, flags); 1689 return -EBUSY; 1690 } 1691 vport->flags |= FC_VPORT_DELETING; 1692 spin_unlock_irqrestore(shost->host_lock, flags); 1693 1694 fc_queue_work(shost, &vport->vport_delete_work); 1695 return count; 1696 } 1697 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, 1698 NULL, store_fc_vport_delete); 1699 1700 1701 /* 1702 * Enable/Disable vport 1703 * Write "1" to disable, write "0" to enable 1704 */ 1705 static ssize_t store_fc_vport_disable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1706 store_fc_vport_disable(struct device *dev, struct device_attribute *attr, 1707 const char *buf, 1708 size_t count) 1709 { 1710 struct fc_vport *vport = transport_class_to_vport(dev); 1711 struct Scsi_Host *shost = vport_to_shost(vport); 1712 struct fc_internal *i = to_fc_internal(shost->transportt); 1713 int stat; 1714 1715 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 1716 return -EBUSY; 1717 1718 if (*buf == '0') { 1719 if (vport->vport_state != FC_VPORT_DISABLED) 1720 return -EALREADY; 1721 } else if (*buf == '1') { 1722 if (vport->vport_state == FC_VPORT_DISABLED) 1723 return -EALREADY; 1724 } else 1725 return -EINVAL; 1726 1727 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); 1728 return stat ? stat : count; 1729 } 1730 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, 1731 NULL, store_fc_vport_disable); 1732 1733 1734 /* 1735 * Host Attribute Management 1736 */ 1737 1738 #define fc_host_show_function(field, format_string, sz, cast) \ 1739 static ssize_t \ 1740 show_fc_host_##field (struct device *dev, \ 1741 struct device_attribute *attr, char *buf) \ 1742 { \ 1743 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1744 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1745 if (i->f->get_host_##field) \ 1746 i->f->get_host_##field(shost); \ 1747 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1748 } 1749 1750 #define fc_host_store_function(field) \ 1751 static ssize_t \ 1752 store_fc_host_##field(struct device *dev, \ 1753 struct device_attribute *attr, \ 1754 const char *buf, size_t count) \ 1755 { \ 1756 int val; \ 1757 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1758 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1759 char *cp; \ 1760 \ 1761 val = simple_strtoul(buf, &cp, 0); \ 1762 if (*cp && (*cp != '\n')) \ 1763 return -EINVAL; \ 1764 i->f->set_host_##field(shost, val); \ 1765 return count; \ 1766 } 1767 1768 #define fc_host_store_str_function(field, slen) \ 1769 static ssize_t \ 1770 store_fc_host_##field(struct device *dev, \ 1771 struct device_attribute *attr, \ 1772 const char *buf, size_t count) \ 1773 { \ 1774 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1775 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1776 unsigned int cnt=count; \ 1777 \ 1778 /* count may include a LF at end of string */ \ 1779 if (buf[cnt-1] == '\n') \ 1780 cnt--; \ 1781 if (cnt > ((slen) - 1)) \ 1782 return -EINVAL; \ 1783 memcpy(fc_host_##field(shost), buf, cnt); \ 1784 i->f->set_host_##field(shost); \ 1785 return count; \ 1786 } 1787 1788 #define fc_host_rd_attr(field, format_string, sz) \ 1789 fc_host_show_function(field, format_string, sz, ) \ 1790 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1791 show_fc_host_##field, NULL) 1792 1793 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ 1794 fc_host_show_function(field, format_string, sz, (cast)) \ 1795 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1796 show_fc_host_##field, NULL) 1797 1798 #define fc_host_rw_attr(field, format_string, sz) \ 1799 fc_host_show_function(field, format_string, sz, ) \ 1800 fc_host_store_function(field) \ 1801 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ 1802 show_fc_host_##field, \ 1803 store_fc_host_##field) 1804 1805 #define fc_host_rd_enum_attr(title, maxlen) \ 1806 static ssize_t \ 1807 show_fc_host_##title (struct device *dev, \ 1808 struct device_attribute *attr, char *buf) \ 1809 { \ 1810 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1811 struct fc_internal *i = to_fc_internal(shost->transportt); \ 1812 const char *name; \ 1813 if (i->f->get_host_##title) \ 1814 i->f->get_host_##title(shost); \ 1815 name = get_fc_##title##_name(fc_host_##title(shost)); \ 1816 if (!name) \ 1817 return -EINVAL; \ 1818 return snprintf(buf, maxlen, "%s\n", name); \ 1819 } \ 1820 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) 1821 1822 #define SETUP_HOST_ATTRIBUTE_RD(field) \ 1823 i->private_host_attrs[count] = device_attr_host_##field; \ 1824 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1825 i->private_host_attrs[count].store = NULL; \ 1826 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1827 if (i->f->show_host_##field) \ 1828 count++ 1829 1830 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ 1831 i->private_host_attrs[count] = device_attr_host_##field; \ 1832 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1833 i->private_host_attrs[count].store = NULL; \ 1834 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1835 count++ 1836 1837 #define SETUP_HOST_ATTRIBUTE_RW(field) \ 1838 i->private_host_attrs[count] = device_attr_host_##field; \ 1839 if (!i->f->set_host_##field) { \ 1840 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1841 i->private_host_attrs[count].store = NULL; \ 1842 } \ 1843 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1844 if (i->f->show_host_##field) \ 1845 count++ 1846 1847 1848 #define fc_private_host_show_function(field, format_string, sz, cast) \ 1849 static ssize_t \ 1850 show_fc_host_##field (struct device *dev, \ 1851 struct device_attribute *attr, char *buf) \ 1852 { \ 1853 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 1854 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ 1855 } 1856 1857 #define fc_private_host_rd_attr(field, format_string, sz) \ 1858 fc_private_host_show_function(field, format_string, sz, ) \ 1859 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1860 show_fc_host_##field, NULL) 1861 1862 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ 1863 fc_private_host_show_function(field, format_string, sz, (cast)) \ 1864 static FC_DEVICE_ATTR(host, field, S_IRUGO, \ 1865 show_fc_host_##field, NULL) 1866 1867 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ 1868 i->private_host_attrs[count] = device_attr_host_##field; \ 1869 i->private_host_attrs[count].attr.mode = S_IRUGO; \ 1870 i->private_host_attrs[count].store = NULL; \ 1871 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1872 count++ 1873 1874 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ 1875 { \ 1876 i->private_host_attrs[count] = device_attr_host_##field; \ 1877 i->host_attrs[count] = &i->private_host_attrs[count]; \ 1878 count++; \ 1879 } 1880 1881 1882 /* Fixed Host Attributes */ 1883 1884 static ssize_t show_fc_host_supported_classes(struct device * dev,struct device_attribute * attr,char * buf)1885 show_fc_host_supported_classes (struct device *dev, 1886 struct device_attribute *attr, char *buf) 1887 { 1888 struct Scsi_Host *shost = transport_class_to_shost(dev); 1889 1890 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) 1891 return snprintf(buf, 20, "unspecified\n"); 1892 1893 return get_fc_cos_names(fc_host_supported_classes(shost), buf); 1894 } 1895 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, 1896 show_fc_host_supported_classes, NULL); 1897 1898 static ssize_t show_fc_host_supported_fc4s(struct device * dev,struct device_attribute * attr,char * buf)1899 show_fc_host_supported_fc4s (struct device *dev, 1900 struct device_attribute *attr, char *buf) 1901 { 1902 struct Scsi_Host *shost = transport_class_to_shost(dev); 1903 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); 1904 } 1905 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, 1906 show_fc_host_supported_fc4s, NULL); 1907 1908 static ssize_t show_fc_host_supported_speeds(struct device * dev,struct device_attribute * attr,char * buf)1909 show_fc_host_supported_speeds (struct device *dev, 1910 struct device_attribute *attr, char *buf) 1911 { 1912 struct Scsi_Host *shost = transport_class_to_shost(dev); 1913 1914 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) 1915 return snprintf(buf, 20, "unknown\n"); 1916 1917 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); 1918 } 1919 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, 1920 show_fc_host_supported_speeds, NULL); 1921 1922 1923 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); 1924 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); 1925 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, 1926 unsigned long long); 1927 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); 1928 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); 1929 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); 1930 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); 1931 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1932 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1933 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1934 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1935 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1936 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); 1937 1938 1939 /* Dynamic Host Attributes */ 1940 1941 static ssize_t show_fc_host_active_fc4s(struct device * dev,struct device_attribute * attr,char * buf)1942 show_fc_host_active_fc4s (struct device *dev, 1943 struct device_attribute *attr, char *buf) 1944 { 1945 struct Scsi_Host *shost = transport_class_to_shost(dev); 1946 struct fc_internal *i = to_fc_internal(shost->transportt); 1947 1948 if (i->f->get_host_active_fc4s) 1949 i->f->get_host_active_fc4s(shost); 1950 1951 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); 1952 } 1953 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, 1954 show_fc_host_active_fc4s, NULL); 1955 1956 static ssize_t show_fc_host_speed(struct device * dev,struct device_attribute * attr,char * buf)1957 show_fc_host_speed (struct device *dev, 1958 struct device_attribute *attr, char *buf) 1959 { 1960 struct Scsi_Host *shost = transport_class_to_shost(dev); 1961 struct fc_internal *i = to_fc_internal(shost->transportt); 1962 1963 if (i->f->get_host_speed) 1964 i->f->get_host_speed(shost); 1965 1966 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) 1967 return snprintf(buf, 20, "unknown\n"); 1968 1969 return get_fc_port_speed_names(fc_host_speed(shost), buf); 1970 } 1971 static FC_DEVICE_ATTR(host, speed, S_IRUGO, 1972 show_fc_host_speed, NULL); 1973 1974 1975 fc_host_rd_attr(port_id, "0x%06x\n", 20); 1976 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); 1977 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); 1978 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); 1979 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); 1980 1981 fc_private_host_show_function(system_hostname, "%s\n", 1982 FC_SYMBOLIC_NAME_SIZE + 1, ) 1983 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) 1984 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, 1985 show_fc_host_system_hostname, store_fc_host_system_hostname); 1986 1987 1988 /* Private Host Attributes */ 1989 1990 static ssize_t show_fc_private_host_tgtid_bind_type(struct device * dev,struct device_attribute * attr,char * buf)1991 show_fc_private_host_tgtid_bind_type(struct device *dev, 1992 struct device_attribute *attr, char *buf) 1993 { 1994 struct Scsi_Host *shost = transport_class_to_shost(dev); 1995 const char *name; 1996 1997 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); 1998 if (!name) 1999 return -EINVAL; 2000 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); 2001 } 2002 2003 #define get_list_head_entry(pos, head, member) \ 2004 pos = list_entry((head)->next, typeof(*pos), member) 2005 2006 static ssize_t store_fc_private_host_tgtid_bind_type(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2007 store_fc_private_host_tgtid_bind_type(struct device *dev, 2008 struct device_attribute *attr, const char *buf, size_t count) 2009 { 2010 struct Scsi_Host *shost = transport_class_to_shost(dev); 2011 struct fc_rport *rport; 2012 enum fc_tgtid_binding_type val; 2013 unsigned long flags; 2014 2015 if (get_fc_tgtid_bind_type_match(buf, &val)) 2016 return -EINVAL; 2017 2018 /* if changing bind type, purge all unused consistent bindings */ 2019 if (val != fc_host_tgtid_bind_type(shost)) { 2020 spin_lock_irqsave(shost->host_lock, flags); 2021 while (!list_empty(&fc_host_rport_bindings(shost))) { 2022 get_list_head_entry(rport, 2023 &fc_host_rport_bindings(shost), peers); 2024 list_del(&rport->peers); 2025 rport->port_state = FC_PORTSTATE_DELETED; 2026 fc_queue_work(shost, &rport->rport_delete_work); 2027 } 2028 spin_unlock_irqrestore(shost->host_lock, flags); 2029 } 2030 2031 fc_host_tgtid_bind_type(shost) = val; 2032 return count; 2033 } 2034 2035 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, 2036 show_fc_private_host_tgtid_bind_type, 2037 store_fc_private_host_tgtid_bind_type); 2038 2039 static ssize_t store_fc_private_host_issue_lip(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2040 store_fc_private_host_issue_lip(struct device *dev, 2041 struct device_attribute *attr, const char *buf, size_t count) 2042 { 2043 struct Scsi_Host *shost = transport_class_to_shost(dev); 2044 struct fc_internal *i = to_fc_internal(shost->transportt); 2045 int ret; 2046 2047 /* ignore any data value written to the attribute */ 2048 if (i->f->issue_fc_host_lip) { 2049 ret = i->f->issue_fc_host_lip(shost); 2050 return ret ? ret: count; 2051 } 2052 2053 return -ENOENT; 2054 } 2055 2056 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, 2057 store_fc_private_host_issue_lip); 2058 2059 static ssize_t store_fc_private_host_dev_loss_tmo(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2060 store_fc_private_host_dev_loss_tmo(struct device *dev, 2061 struct device_attribute *attr, 2062 const char *buf, size_t count) 2063 { 2064 struct Scsi_Host *shost = transport_class_to_shost(dev); 2065 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2066 struct fc_rport *rport; 2067 unsigned long val, flags; 2068 int rc; 2069 2070 rc = fc_str_to_dev_loss(buf, &val); 2071 if (rc) 2072 return rc; 2073 2074 fc_host_dev_loss_tmo(shost) = val; 2075 spin_lock_irqsave(shost->host_lock, flags); 2076 list_for_each_entry(rport, &fc_host->rports, peers) 2077 fc_rport_set_dev_loss_tmo(rport, val); 2078 spin_unlock_irqrestore(shost->host_lock, flags); 2079 return count; 2080 } 2081 2082 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); 2083 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, 2084 show_fc_host_dev_loss_tmo, 2085 store_fc_private_host_dev_loss_tmo); 2086 2087 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); 2088 2089 /* 2090 * Host Statistics Management 2091 */ 2092 2093 /* Show a given attribute in the statistics group */ 2094 static ssize_t fc_stat_show(const struct device * dev,char * buf,unsigned long offset)2095 fc_stat_show(const struct device *dev, char *buf, unsigned long offset) 2096 { 2097 struct Scsi_Host *shost = transport_class_to_shost(dev); 2098 struct fc_internal *i = to_fc_internal(shost->transportt); 2099 struct fc_host_statistics *stats; 2100 ssize_t ret = -ENOENT; 2101 2102 if (offset > sizeof(struct fc_host_statistics) || 2103 offset % sizeof(u64) != 0) 2104 WARN_ON(1); 2105 2106 if (i->f->get_fc_host_stats) { 2107 stats = (i->f->get_fc_host_stats)(shost); 2108 if (stats) 2109 ret = snprintf(buf, 20, "0x%llx\n", 2110 (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); 2111 } 2112 return ret; 2113 } 2114 2115 2116 /* generate a read-only statistics attribute */ 2117 #define fc_host_statistic(name) \ 2118 static ssize_t show_fcstat_##name(struct device *cd, \ 2119 struct device_attribute *attr, \ 2120 char *buf) \ 2121 { \ 2122 return fc_stat_show(cd, buf, \ 2123 offsetof(struct fc_host_statistics, name)); \ 2124 } \ 2125 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) 2126 2127 fc_host_statistic(seconds_since_last_reset); 2128 fc_host_statistic(tx_frames); 2129 fc_host_statistic(tx_words); 2130 fc_host_statistic(rx_frames); 2131 fc_host_statistic(rx_words); 2132 fc_host_statistic(lip_count); 2133 fc_host_statistic(nos_count); 2134 fc_host_statistic(error_frames); 2135 fc_host_statistic(dumped_frames); 2136 fc_host_statistic(link_failure_count); 2137 fc_host_statistic(loss_of_sync_count); 2138 fc_host_statistic(loss_of_signal_count); 2139 fc_host_statistic(prim_seq_protocol_err_count); 2140 fc_host_statistic(invalid_tx_word_count); 2141 fc_host_statistic(invalid_crc_count); 2142 fc_host_statistic(fcp_input_requests); 2143 fc_host_statistic(fcp_output_requests); 2144 fc_host_statistic(fcp_control_requests); 2145 fc_host_statistic(fcp_input_megabytes); 2146 fc_host_statistic(fcp_output_megabytes); 2147 fc_host_statistic(fcp_packet_alloc_failures); 2148 fc_host_statistic(fcp_packet_aborts); 2149 fc_host_statistic(fcp_frame_alloc_failures); 2150 fc_host_statistic(fc_no_free_exch); 2151 fc_host_statistic(fc_no_free_exch_xid); 2152 fc_host_statistic(fc_xid_not_found); 2153 fc_host_statistic(fc_xid_busy); 2154 fc_host_statistic(fc_seq_not_found); 2155 fc_host_statistic(fc_non_bls_resp); 2156 fc_host_statistic(cn_sig_warn); 2157 fc_host_statistic(cn_sig_alarm); 2158 2159 2160 #define fc_host_fpin_statistic(name) \ 2161 static ssize_t fc_host_fpinstat_##name(struct device *cd, \ 2162 struct device_attribute *attr, \ 2163 char *buf) \ 2164 { \ 2165 struct Scsi_Host *shost = transport_class_to_shost(cd); \ 2166 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \ 2167 \ 2168 return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \ 2169 } \ 2170 static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL) 2171 2172 fc_host_fpin_statistic(dn); 2173 fc_host_fpin_statistic(dn_unknown); 2174 fc_host_fpin_statistic(dn_timeout); 2175 fc_host_fpin_statistic(dn_unable_to_route); 2176 fc_host_fpin_statistic(dn_device_specific); 2177 fc_host_fpin_statistic(cn); 2178 fc_host_fpin_statistic(cn_clear); 2179 fc_host_fpin_statistic(cn_lost_credit); 2180 fc_host_fpin_statistic(cn_credit_stall); 2181 fc_host_fpin_statistic(cn_oversubscription); 2182 fc_host_fpin_statistic(cn_device_specific); 2183 fc_host_fpin_statistic(li); 2184 fc_host_fpin_statistic(li_failure_unknown); 2185 fc_host_fpin_statistic(li_link_failure_count); 2186 fc_host_fpin_statistic(li_loss_of_sync_count); 2187 fc_host_fpin_statistic(li_loss_of_signals_count); 2188 fc_host_fpin_statistic(li_prim_seq_err_count); 2189 fc_host_fpin_statistic(li_invalid_tx_word_count); 2190 fc_host_fpin_statistic(li_invalid_crc_count); 2191 fc_host_fpin_statistic(li_device_specific); 2192 2193 static ssize_t fc_reset_statistics(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2194 fc_reset_statistics(struct device *dev, struct device_attribute *attr, 2195 const char *buf, size_t count) 2196 { 2197 struct Scsi_Host *shost = transport_class_to_shost(dev); 2198 struct fc_internal *i = to_fc_internal(shost->transportt); 2199 2200 /* ignore any data value written to the attribute */ 2201 if (i->f->reset_fc_host_stats) { 2202 i->f->reset_fc_host_stats(shost); 2203 return count; 2204 } 2205 2206 return -ENOENT; 2207 } 2208 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, 2209 fc_reset_statistics); 2210 2211 static struct attribute *fc_statistics_attrs[] = { 2212 &device_attr_host_seconds_since_last_reset.attr, 2213 &device_attr_host_tx_frames.attr, 2214 &device_attr_host_tx_words.attr, 2215 &device_attr_host_rx_frames.attr, 2216 &device_attr_host_rx_words.attr, 2217 &device_attr_host_lip_count.attr, 2218 &device_attr_host_nos_count.attr, 2219 &device_attr_host_error_frames.attr, 2220 &device_attr_host_dumped_frames.attr, 2221 &device_attr_host_link_failure_count.attr, 2222 &device_attr_host_loss_of_sync_count.attr, 2223 &device_attr_host_loss_of_signal_count.attr, 2224 &device_attr_host_prim_seq_protocol_err_count.attr, 2225 &device_attr_host_invalid_tx_word_count.attr, 2226 &device_attr_host_invalid_crc_count.attr, 2227 &device_attr_host_fcp_input_requests.attr, 2228 &device_attr_host_fcp_output_requests.attr, 2229 &device_attr_host_fcp_control_requests.attr, 2230 &device_attr_host_fcp_input_megabytes.attr, 2231 &device_attr_host_fcp_output_megabytes.attr, 2232 &device_attr_host_fcp_packet_alloc_failures.attr, 2233 &device_attr_host_fcp_packet_aborts.attr, 2234 &device_attr_host_fcp_frame_alloc_failures.attr, 2235 &device_attr_host_fc_no_free_exch.attr, 2236 &device_attr_host_fc_no_free_exch_xid.attr, 2237 &device_attr_host_fc_xid_not_found.attr, 2238 &device_attr_host_fc_xid_busy.attr, 2239 &device_attr_host_fc_seq_not_found.attr, 2240 &device_attr_host_fc_non_bls_resp.attr, 2241 &device_attr_host_cn_sig_warn.attr, 2242 &device_attr_host_cn_sig_alarm.attr, 2243 &device_attr_host_reset_statistics.attr, 2244 &device_attr_host_fpin_dn.attr, 2245 &device_attr_host_fpin_dn_unknown.attr, 2246 &device_attr_host_fpin_dn_timeout.attr, 2247 &device_attr_host_fpin_dn_unable_to_route.attr, 2248 &device_attr_host_fpin_dn_device_specific.attr, 2249 &device_attr_host_fpin_li.attr, 2250 &device_attr_host_fpin_li_failure_unknown.attr, 2251 &device_attr_host_fpin_li_link_failure_count.attr, 2252 &device_attr_host_fpin_li_loss_of_sync_count.attr, 2253 &device_attr_host_fpin_li_loss_of_signals_count.attr, 2254 &device_attr_host_fpin_li_prim_seq_err_count.attr, 2255 &device_attr_host_fpin_li_invalid_tx_word_count.attr, 2256 &device_attr_host_fpin_li_invalid_crc_count.attr, 2257 &device_attr_host_fpin_li_device_specific.attr, 2258 &device_attr_host_fpin_cn.attr, 2259 &device_attr_host_fpin_cn_clear.attr, 2260 &device_attr_host_fpin_cn_lost_credit.attr, 2261 &device_attr_host_fpin_cn_credit_stall.attr, 2262 &device_attr_host_fpin_cn_oversubscription.attr, 2263 &device_attr_host_fpin_cn_device_specific.attr, 2264 NULL 2265 }; 2266 2267 static struct attribute_group fc_statistics_group = { 2268 .name = "statistics", 2269 .attrs = fc_statistics_attrs, 2270 }; 2271 2272 2273 /* Host Vport Attributes */ 2274 2275 static int fc_parse_wwn(const char * ns,u64 * nm)2276 fc_parse_wwn(const char *ns, u64 *nm) 2277 { 2278 unsigned int i, j; 2279 u8 wwn[8]; 2280 2281 memset(wwn, 0, sizeof(wwn)); 2282 2283 /* Validate and store the new name */ 2284 for (i=0, j=0; i < 16; i++) { 2285 int value; 2286 2287 value = hex_to_bin(*ns++); 2288 if (value >= 0) 2289 j = (j << 4) | value; 2290 else 2291 return -EINVAL; 2292 if (i % 2) { 2293 wwn[i/2] = j & 0xff; 2294 j = 0; 2295 } 2296 } 2297 2298 *nm = wwn_to_u64(wwn); 2299 2300 return 0; 2301 } 2302 2303 2304 /* 2305 * "Short-cut" sysfs variable to create a new vport on a FC Host. 2306 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes 2307 * will default to a NPIV-based FCP_Initiator; The WWNs are specified 2308 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) 2309 */ 2310 static ssize_t store_fc_host_vport_create(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2311 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, 2312 const char *buf, size_t count) 2313 { 2314 struct Scsi_Host *shost = transport_class_to_shost(dev); 2315 struct fc_vport_identifiers vid; 2316 struct fc_vport *vport; 2317 unsigned int cnt=count; 2318 int stat; 2319 2320 memset(&vid, 0, sizeof(vid)); 2321 2322 /* count may include a LF at end of string */ 2323 if (buf[cnt-1] == '\n') 2324 cnt--; 2325 2326 /* validate we have enough characters for WWPN */ 2327 if ((cnt != (16+1+16)) || (buf[16] != ':')) 2328 return -EINVAL; 2329 2330 stat = fc_parse_wwn(&buf[0], &vid.port_name); 2331 if (stat) 2332 return stat; 2333 2334 stat = fc_parse_wwn(&buf[17], &vid.node_name); 2335 if (stat) 2336 return stat; 2337 2338 vid.roles = FC_PORT_ROLE_FCP_INITIATOR; 2339 vid.vport_type = FC_PORTTYPE_NPIV; 2340 /* vid.symbolic_name is already zero/NULL's */ 2341 vid.disable = false; /* always enabled */ 2342 2343 /* we only allow support on Channel 0 !!! */ 2344 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); 2345 return stat ? stat : count; 2346 } 2347 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, 2348 store_fc_host_vport_create); 2349 2350 2351 /* 2352 * "Short-cut" sysfs variable to delete a vport on a FC Host. 2353 * Vport is identified by a string containing "<WWPN>:<WWNN>". 2354 * The WWNs are specified as hex characters, and may *not* contain 2355 * any prefixes (e.g. 0x, x, etc) 2356 */ 2357 static ssize_t store_fc_host_vport_delete(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2358 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, 2359 const char *buf, size_t count) 2360 { 2361 struct Scsi_Host *shost = transport_class_to_shost(dev); 2362 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2363 struct fc_vport *vport; 2364 u64 wwpn, wwnn; 2365 unsigned long flags; 2366 unsigned int cnt=count; 2367 int stat, match; 2368 2369 /* count may include a LF at end of string */ 2370 if (buf[cnt-1] == '\n') 2371 cnt--; 2372 2373 /* validate we have enough characters for WWPN */ 2374 if ((cnt != (16+1+16)) || (buf[16] != ':')) 2375 return -EINVAL; 2376 2377 stat = fc_parse_wwn(&buf[0], &wwpn); 2378 if (stat) 2379 return stat; 2380 2381 stat = fc_parse_wwn(&buf[17], &wwnn); 2382 if (stat) 2383 return stat; 2384 2385 spin_lock_irqsave(shost->host_lock, flags); 2386 match = 0; 2387 /* we only allow support on Channel 0 !!! */ 2388 list_for_each_entry(vport, &fc_host->vports, peers) { 2389 if ((vport->channel == 0) && 2390 (vport->port_name == wwpn) && (vport->node_name == wwnn)) { 2391 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) 2392 break; 2393 vport->flags |= FC_VPORT_DELETING; 2394 match = 1; 2395 break; 2396 } 2397 } 2398 spin_unlock_irqrestore(shost->host_lock, flags); 2399 2400 if (!match) 2401 return -ENODEV; 2402 2403 stat = fc_vport_terminate(vport); 2404 return stat ? stat : count; 2405 } 2406 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, 2407 store_fc_host_vport_delete); 2408 2409 fc_host_match(struct attribute_container * cont,struct device * dev)2410 static int fc_host_match(struct attribute_container *cont, 2411 struct device *dev) 2412 { 2413 struct Scsi_Host *shost; 2414 struct fc_internal *i; 2415 2416 if (!scsi_is_host_device(dev)) 2417 return 0; 2418 2419 shost = dev_to_shost(dev); 2420 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2421 != &fc_host_class.class) 2422 return 0; 2423 2424 i = to_fc_internal(shost->transportt); 2425 2426 return &i->t.host_attrs.ac == cont; 2427 } 2428 fc_target_match(struct attribute_container * cont,struct device * dev)2429 static int fc_target_match(struct attribute_container *cont, 2430 struct device *dev) 2431 { 2432 struct Scsi_Host *shost; 2433 struct fc_internal *i; 2434 2435 if (!scsi_is_target_device(dev)) 2436 return 0; 2437 2438 shost = dev_to_shost(dev->parent); 2439 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2440 != &fc_host_class.class) 2441 return 0; 2442 2443 i = to_fc_internal(shost->transportt); 2444 2445 return &i->t.target_attrs.ac == cont; 2446 } 2447 fc_rport_dev_release(struct device * dev)2448 static void fc_rport_dev_release(struct device *dev) 2449 { 2450 struct fc_rport *rport = dev_to_rport(dev); 2451 put_device(dev->parent); 2452 kfree(rport); 2453 } 2454 scsi_is_fc_rport(const struct device * dev)2455 int scsi_is_fc_rport(const struct device *dev) 2456 { 2457 return dev->release == fc_rport_dev_release; 2458 } 2459 EXPORT_SYMBOL(scsi_is_fc_rport); 2460 fc_rport_match(struct attribute_container * cont,struct device * dev)2461 static int fc_rport_match(struct attribute_container *cont, 2462 struct device *dev) 2463 { 2464 struct Scsi_Host *shost; 2465 struct fc_internal *i; 2466 2467 if (!scsi_is_fc_rport(dev)) 2468 return 0; 2469 2470 shost = dev_to_shost(dev->parent); 2471 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2472 != &fc_host_class.class) 2473 return 0; 2474 2475 i = to_fc_internal(shost->transportt); 2476 2477 return &i->rport_attr_cont.ac == cont; 2478 } 2479 2480 fc_vport_dev_release(struct device * dev)2481 static void fc_vport_dev_release(struct device *dev) 2482 { 2483 struct fc_vport *vport = dev_to_vport(dev); 2484 put_device(dev->parent); /* release kobj parent */ 2485 kfree(vport); 2486 } 2487 scsi_is_fc_vport(const struct device * dev)2488 static int scsi_is_fc_vport(const struct device *dev) 2489 { 2490 return dev->release == fc_vport_dev_release; 2491 } 2492 fc_vport_match(struct attribute_container * cont,struct device * dev)2493 static int fc_vport_match(struct attribute_container *cont, 2494 struct device *dev) 2495 { 2496 struct fc_vport *vport; 2497 struct Scsi_Host *shost; 2498 struct fc_internal *i; 2499 2500 if (!scsi_is_fc_vport(dev)) 2501 return 0; 2502 vport = dev_to_vport(dev); 2503 2504 shost = vport_to_shost(vport); 2505 if (!shost->transportt || shost->transportt->host_attrs.ac.class 2506 != &fc_host_class.class) 2507 return 0; 2508 2509 i = to_fc_internal(shost->transportt); 2510 return &i->vport_attr_cont.ac == cont; 2511 } 2512 2513 2514 /** 2515 * fc_eh_timed_out - FC Transport I/O timeout intercept handler 2516 * @scmd: The SCSI command which timed out 2517 * 2518 * This routine protects against error handlers getting invoked while a 2519 * rport is in a blocked state, typically due to a temporarily loss of 2520 * connectivity. If the error handlers are allowed to proceed, requests 2521 * to abort i/o, reset the target, etc will likely fail as there is no way 2522 * to communicate with the device to perform the requested function. These 2523 * failures may result in the midlayer taking the device offline, requiring 2524 * manual intervention to restore operation. 2525 * 2526 * This routine, called whenever an i/o times out, validates the state of 2527 * the underlying rport. If the rport is blocked, it returns 2528 * EH_RESET_TIMER, which will continue to reschedule the timeout. 2529 * Eventually, either the device will return, or devloss_tmo will fire, 2530 * and when the timeout then fires, it will be handled normally. 2531 * If the rport is not blocked, normal error handling continues. 2532 * 2533 * Notes: 2534 * This routine assumes no locks are held on entry. 2535 */ fc_eh_timed_out(struct scsi_cmnd * scmd)2536 enum scsi_timeout_action fc_eh_timed_out(struct scsi_cmnd *scmd) 2537 { 2538 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 2539 2540 if (rport->port_state == FC_PORTSTATE_BLOCKED) 2541 return SCSI_EH_RESET_TIMER; 2542 2543 return SCSI_EH_NOT_HANDLED; 2544 } 2545 EXPORT_SYMBOL(fc_eh_timed_out); 2546 2547 /* 2548 * Called by fc_user_scan to locate an rport on the shost that 2549 * matches the channel and target id, and invoke scsi_scan_target() 2550 * on the rport. 2551 */ 2552 static void fc_user_scan_tgt(struct Scsi_Host * shost,uint channel,uint id,u64 lun)2553 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2554 { 2555 struct fc_rport *rport; 2556 unsigned long flags; 2557 2558 spin_lock_irqsave(shost->host_lock, flags); 2559 2560 list_for_each_entry(rport, &fc_host_rports(shost), peers) { 2561 if (rport->scsi_target_id == -1) 2562 continue; 2563 2564 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 2565 (rport->port_state != FC_PORTSTATE_MARGINAL)) 2566 continue; 2567 2568 if ((channel == rport->channel) && 2569 (id == rport->scsi_target_id)) { 2570 spin_unlock_irqrestore(shost->host_lock, flags); 2571 scsi_scan_target(&rport->dev, channel, id, lun, 2572 SCSI_SCAN_MANUAL); 2573 return; 2574 } 2575 } 2576 2577 spin_unlock_irqrestore(shost->host_lock, flags); 2578 } 2579 2580 /* 2581 * Called via sysfs scan routines. Necessary, as the FC transport 2582 * wants to place all target objects below the rport object. So this 2583 * routine must invoke the scsi_scan_target() routine with the rport 2584 * object as the parent. 2585 */ 2586 static int fc_user_scan(struct Scsi_Host * shost,uint channel,uint id,u64 lun)2587 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) 2588 { 2589 uint chlo, chhi; 2590 uint tgtlo, tgthi; 2591 2592 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || 2593 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || 2594 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) 2595 return -EINVAL; 2596 2597 if (channel == SCAN_WILD_CARD) { 2598 chlo = 0; 2599 chhi = shost->max_channel + 1; 2600 } else { 2601 chlo = channel; 2602 chhi = channel + 1; 2603 } 2604 2605 if (id == SCAN_WILD_CARD) { 2606 tgtlo = 0; 2607 tgthi = shost->max_id; 2608 } else { 2609 tgtlo = id; 2610 tgthi = id + 1; 2611 } 2612 2613 for ( ; chlo < chhi; chlo++) 2614 for ( ; tgtlo < tgthi; tgtlo++) 2615 fc_user_scan_tgt(shost, chlo, tgtlo, lun); 2616 2617 return 0; 2618 } 2619 2620 struct scsi_transport_template * fc_attach_transport(struct fc_function_template * ft)2621 fc_attach_transport(struct fc_function_template *ft) 2622 { 2623 int count; 2624 struct fc_internal *i = kzalloc(sizeof(struct fc_internal), 2625 GFP_KERNEL); 2626 2627 if (unlikely(!i)) 2628 return NULL; 2629 2630 i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; 2631 i->t.target_attrs.ac.class = &fc_transport_class.class; 2632 i->t.target_attrs.ac.match = fc_target_match; 2633 i->t.target_size = sizeof(struct fc_starget_attrs); 2634 transport_container_register(&i->t.target_attrs); 2635 2636 i->t.host_attrs.ac.attrs = &i->host_attrs[0]; 2637 i->t.host_attrs.ac.class = &fc_host_class.class; 2638 i->t.host_attrs.ac.match = fc_host_match; 2639 i->t.host_size = sizeof(struct fc_host_attrs); 2640 if (ft->get_fc_host_stats) 2641 i->t.host_attrs.statistics = &fc_statistics_group; 2642 transport_container_register(&i->t.host_attrs); 2643 2644 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; 2645 i->rport_attr_cont.ac.class = &fc_rport_class.class; 2646 i->rport_attr_cont.ac.match = fc_rport_match; 2647 i->rport_attr_cont.statistics = &fc_rport_statistics_group; 2648 transport_container_register(&i->rport_attr_cont); 2649 2650 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; 2651 i->vport_attr_cont.ac.class = &fc_vport_class.class; 2652 i->vport_attr_cont.ac.match = fc_vport_match; 2653 transport_container_register(&i->vport_attr_cont); 2654 2655 i->f = ft; 2656 2657 /* Transport uses the shost workq for scsi scanning */ 2658 i->t.create_work_queue = 1; 2659 2660 i->t.user_scan = fc_user_scan; 2661 2662 /* 2663 * Setup SCSI Target Attributes. 2664 */ 2665 count = 0; 2666 SETUP_STARGET_ATTRIBUTE_RD(node_name); 2667 SETUP_STARGET_ATTRIBUTE_RD(port_name); 2668 SETUP_STARGET_ATTRIBUTE_RD(port_id); 2669 2670 BUG_ON(count > FC_STARGET_NUM_ATTRS); 2671 2672 i->starget_attrs[count] = NULL; 2673 2674 2675 /* 2676 * Setup SCSI Host Attributes. 2677 */ 2678 count=0; 2679 SETUP_HOST_ATTRIBUTE_RD(node_name); 2680 SETUP_HOST_ATTRIBUTE_RD(port_name); 2681 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); 2682 SETUP_HOST_ATTRIBUTE_RD(supported_classes); 2683 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); 2684 SETUP_HOST_ATTRIBUTE_RD(supported_speeds); 2685 SETUP_HOST_ATTRIBUTE_RD(maxframe_size); 2686 if (ft->vport_create) { 2687 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); 2688 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); 2689 } 2690 SETUP_HOST_ATTRIBUTE_RD(serial_number); 2691 SETUP_HOST_ATTRIBUTE_RD(manufacturer); 2692 SETUP_HOST_ATTRIBUTE_RD(model); 2693 SETUP_HOST_ATTRIBUTE_RD(model_description); 2694 SETUP_HOST_ATTRIBUTE_RD(hardware_version); 2695 SETUP_HOST_ATTRIBUTE_RD(driver_version); 2696 SETUP_HOST_ATTRIBUTE_RD(firmware_version); 2697 SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 2698 2699 SETUP_HOST_ATTRIBUTE_RD(port_id); 2700 SETUP_HOST_ATTRIBUTE_RD(port_type); 2701 SETUP_HOST_ATTRIBUTE_RD(port_state); 2702 SETUP_HOST_ATTRIBUTE_RD(active_fc4s); 2703 SETUP_HOST_ATTRIBUTE_RD(speed); 2704 SETUP_HOST_ATTRIBUTE_RD(fabric_name); 2705 SETUP_HOST_ATTRIBUTE_RD(symbolic_name); 2706 SETUP_HOST_ATTRIBUTE_RW(system_hostname); 2707 2708 /* Transport-managed attributes */ 2709 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo); 2710 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); 2711 if (ft->issue_fc_host_lip) 2712 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); 2713 if (ft->vport_create) 2714 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); 2715 if (ft->vport_delete) 2716 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); 2717 2718 BUG_ON(count > FC_HOST_NUM_ATTRS); 2719 2720 i->host_attrs[count] = NULL; 2721 2722 /* 2723 * Setup Remote Port Attributes. 2724 */ 2725 count=0; 2726 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); 2727 SETUP_RPORT_ATTRIBUTE_RD(supported_classes); 2728 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); 2729 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); 2730 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); 2731 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); 2732 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); 2733 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(port_state); 2734 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); 2735 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); 2736 2737 BUG_ON(count > FC_RPORT_NUM_ATTRS); 2738 2739 i->rport_attrs[count] = NULL; 2740 2741 /* 2742 * Setup Virtual Port Attributes. 2743 */ 2744 count=0; 2745 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); 2746 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); 2747 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); 2748 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); 2749 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); 2750 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); 2751 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); 2752 SETUP_VPORT_ATTRIBUTE_WR(vport_delete); 2753 SETUP_VPORT_ATTRIBUTE_WR(vport_disable); 2754 2755 BUG_ON(count > FC_VPORT_NUM_ATTRS); 2756 2757 i->vport_attrs[count] = NULL; 2758 2759 return &i->t; 2760 } 2761 EXPORT_SYMBOL(fc_attach_transport); 2762 fc_release_transport(struct scsi_transport_template * t)2763 void fc_release_transport(struct scsi_transport_template *t) 2764 { 2765 struct fc_internal *i = to_fc_internal(t); 2766 2767 transport_container_unregister(&i->t.target_attrs); 2768 transport_container_unregister(&i->t.host_attrs); 2769 transport_container_unregister(&i->rport_attr_cont); 2770 transport_container_unregister(&i->vport_attr_cont); 2771 2772 kfree(i); 2773 } 2774 EXPORT_SYMBOL(fc_release_transport); 2775 2776 /** 2777 * fc_queue_work - Queue work to the fc_host workqueue. 2778 * @shost: Pointer to Scsi_Host bound to fc_host. 2779 * @work: Work to queue for execution. 2780 * 2781 * Return value: 2782 * 1 - work queued for execution 2783 * 0 - work is already queued 2784 * -EINVAL - work queue doesn't exist 2785 */ 2786 static int fc_queue_work(struct Scsi_Host * shost,struct work_struct * work)2787 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) 2788 { 2789 if (unlikely(!fc_host_work_q(shost))) { 2790 printk(KERN_ERR 2791 "ERROR: FC host '%s' attempted to queue work, " 2792 "when no workqueue created.\n", shost->hostt->name); 2793 dump_stack(); 2794 2795 return -EINVAL; 2796 } 2797 2798 return queue_work(fc_host_work_q(shost), work); 2799 } 2800 2801 /** 2802 * fc_flush_work - Flush a fc_host's workqueue. 2803 * @shost: Pointer to Scsi_Host bound to fc_host. 2804 */ 2805 static void fc_flush_work(struct Scsi_Host * shost)2806 fc_flush_work(struct Scsi_Host *shost) 2807 { 2808 if (!fc_host_work_q(shost)) { 2809 printk(KERN_ERR 2810 "ERROR: FC host '%s' attempted to flush work, " 2811 "when no workqueue created.\n", shost->hostt->name); 2812 dump_stack(); 2813 return; 2814 } 2815 2816 flush_workqueue(fc_host_work_q(shost)); 2817 } 2818 2819 /** 2820 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. 2821 * @shost: Pointer to Scsi_Host bound to fc_host. 2822 * @work: Work to queue for execution. 2823 * @delay: jiffies to delay the work queuing 2824 * 2825 * Return value: 2826 * 1 on success / 0 already queued / < 0 for error 2827 */ 2828 static int fc_queue_devloss_work(struct Scsi_Host * shost,struct delayed_work * work,unsigned long delay)2829 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, 2830 unsigned long delay) 2831 { 2832 if (unlikely(!fc_host_devloss_work_q(shost))) { 2833 printk(KERN_ERR 2834 "ERROR: FC host '%s' attempted to queue work, " 2835 "when no workqueue created.\n", shost->hostt->name); 2836 dump_stack(); 2837 2838 return -EINVAL; 2839 } 2840 2841 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); 2842 } 2843 2844 /** 2845 * fc_flush_devloss - Flush a fc_host's devloss workqueue. 2846 * @shost: Pointer to Scsi_Host bound to fc_host. 2847 */ 2848 static void fc_flush_devloss(struct Scsi_Host * shost)2849 fc_flush_devloss(struct Scsi_Host *shost) 2850 { 2851 if (!fc_host_devloss_work_q(shost)) { 2852 printk(KERN_ERR 2853 "ERROR: FC host '%s' attempted to flush work, " 2854 "when no workqueue created.\n", shost->hostt->name); 2855 dump_stack(); 2856 return; 2857 } 2858 2859 flush_workqueue(fc_host_devloss_work_q(shost)); 2860 } 2861 2862 2863 /** 2864 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. 2865 * @shost: Which &Scsi_Host 2866 * 2867 * This routine is expected to be called immediately preceding the 2868 * a driver's call to scsi_remove_host(). 2869 * 2870 * WARNING: A driver utilizing the fc_transport, which fails to call 2871 * this routine prior to scsi_remove_host(), will leave dangling 2872 * objects in /sys/class/fc_remote_ports. Access to any of these 2873 * objects can result in a system crash !!! 2874 * 2875 * Notes: 2876 * This routine assumes no locks are held on entry. 2877 */ 2878 void fc_remove_host(struct Scsi_Host * shost)2879 fc_remove_host(struct Scsi_Host *shost) 2880 { 2881 struct fc_vport *vport = NULL, *next_vport = NULL; 2882 struct fc_rport *rport = NULL, *next_rport = NULL; 2883 struct workqueue_struct *work_q; 2884 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 2885 unsigned long flags; 2886 2887 spin_lock_irqsave(shost->host_lock, flags); 2888 2889 /* Remove any vports */ 2890 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2891 vport->flags |= FC_VPORT_DELETING; 2892 fc_queue_work(shost, &vport->vport_delete_work); 2893 } 2894 2895 /* Remove any remote ports */ 2896 list_for_each_entry_safe(rport, next_rport, 2897 &fc_host->rports, peers) { 2898 list_del(&rport->peers); 2899 rport->port_state = FC_PORTSTATE_DELETED; 2900 fc_queue_work(shost, &rport->rport_delete_work); 2901 } 2902 2903 list_for_each_entry_safe(rport, next_rport, 2904 &fc_host->rport_bindings, peers) { 2905 list_del(&rport->peers); 2906 rport->port_state = FC_PORTSTATE_DELETED; 2907 fc_queue_work(shost, &rport->rport_delete_work); 2908 } 2909 2910 spin_unlock_irqrestore(shost->host_lock, flags); 2911 2912 /* flush all scan work items */ 2913 scsi_flush_work(shost); 2914 2915 /* flush all stgt delete, and rport delete work items, then kill it */ 2916 if (fc_host->work_q) { 2917 work_q = fc_host->work_q; 2918 fc_host->work_q = NULL; 2919 destroy_workqueue(work_q); 2920 } 2921 2922 /* flush all devloss work items, then kill it */ 2923 if (fc_host->devloss_work_q) { 2924 work_q = fc_host->devloss_work_q; 2925 fc_host->devloss_work_q = NULL; 2926 destroy_workqueue(work_q); 2927 } 2928 } 2929 EXPORT_SYMBOL(fc_remove_host); 2930 fc_terminate_rport_io(struct fc_rport * rport)2931 static void fc_terminate_rport_io(struct fc_rport *rport) 2932 { 2933 struct Scsi_Host *shost = rport_to_shost(rport); 2934 struct fc_internal *i = to_fc_internal(shost->transportt); 2935 2936 /* Involve the LLDD if possible to terminate all io on the rport. */ 2937 if (i->f->terminate_rport_io) 2938 i->f->terminate_rport_io(rport); 2939 2940 /* 2941 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs. 2942 */ 2943 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 2944 } 2945 2946 /** 2947 * fc_starget_delete - called to delete the scsi descendants of an rport 2948 * @work: remote port to be operated on. 2949 * 2950 * Deletes target and all sdevs. 2951 */ 2952 static void fc_starget_delete(struct work_struct * work)2953 fc_starget_delete(struct work_struct *work) 2954 { 2955 struct fc_rport *rport = 2956 container_of(work, struct fc_rport, stgt_delete_work); 2957 2958 fc_terminate_rport_io(rport); 2959 scsi_remove_target(&rport->dev); 2960 } 2961 2962 2963 /** 2964 * fc_rport_final_delete - finish rport termination and delete it. 2965 * @work: remote port to be deleted. 2966 */ 2967 static void fc_rport_final_delete(struct work_struct * work)2968 fc_rport_final_delete(struct work_struct *work) 2969 { 2970 struct fc_rport *rport = 2971 container_of(work, struct fc_rport, rport_delete_work); 2972 struct device *dev = &rport->dev; 2973 struct Scsi_Host *shost = rport_to_shost(rport); 2974 struct fc_internal *i = to_fc_internal(shost->transportt); 2975 unsigned long flags; 2976 int do_callback = 0; 2977 2978 fc_terminate_rport_io(rport); 2979 2980 /* 2981 * if a scan is pending, flush the SCSI Host work_q so that 2982 * that we can reclaim the rport scan work element. 2983 */ 2984 if (rport->flags & FC_RPORT_SCAN_PENDING) 2985 scsi_flush_work(shost); 2986 2987 /* 2988 * Cancel any outstanding timers. These should really exist 2989 * only when rmmod'ing the LLDD and we're asking for 2990 * immediate termination of the rports 2991 */ 2992 spin_lock_irqsave(shost->host_lock, flags); 2993 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { 2994 spin_unlock_irqrestore(shost->host_lock, flags); 2995 if (!cancel_delayed_work(&rport->fail_io_work)) 2996 fc_flush_devloss(shost); 2997 if (!cancel_delayed_work(&rport->dev_loss_work)) 2998 fc_flush_devloss(shost); 2999 cancel_work_sync(&rport->scan_work); 3000 spin_lock_irqsave(shost->host_lock, flags); 3001 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3002 } 3003 spin_unlock_irqrestore(shost->host_lock, flags); 3004 3005 /* Delete SCSI target and sdevs */ 3006 if (rport->scsi_target_id != -1) 3007 fc_starget_delete(&rport->stgt_delete_work); 3008 3009 /* 3010 * Notify the driver that the rport is now dead. The LLDD will 3011 * also guarantee that any communication to the rport is terminated 3012 * 3013 * Avoid this call if we already called it when we preserved the 3014 * rport for the binding. 3015 */ 3016 spin_lock_irqsave(shost->host_lock, flags); 3017 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && 3018 (i->f->dev_loss_tmo_callbk)) { 3019 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3020 do_callback = 1; 3021 } 3022 spin_unlock_irqrestore(shost->host_lock, flags); 3023 3024 if (do_callback) 3025 i->f->dev_loss_tmo_callbk(rport); 3026 3027 fc_bsg_remove(rport->rqst_q); 3028 3029 transport_remove_device(dev); 3030 device_del(dev); 3031 transport_destroy_device(dev); 3032 scsi_host_put(shost); /* for fc_host->rport list */ 3033 put_device(dev); /* for self-reference */ 3034 } 3035 3036 3037 /** 3038 * fc_remote_port_create - allocates and creates a remote FC port. 3039 * @shost: scsi host the remote port is connected to. 3040 * @channel: Channel on shost port connected to. 3041 * @ids: The world wide names, fc address, and FC4 port 3042 * roles for the remote port. 3043 * 3044 * Allocates and creates the remoter port structure, including the 3045 * class and sysfs creation. 3046 * 3047 * Notes: 3048 * This routine assumes no locks are held on entry. 3049 */ 3050 static struct fc_rport * fc_remote_port_create(struct Scsi_Host * shost,int channel,struct fc_rport_identifiers * ids)3051 fc_remote_port_create(struct Scsi_Host *shost, int channel, 3052 struct fc_rport_identifiers *ids) 3053 { 3054 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3055 struct fc_internal *fci = to_fc_internal(shost->transportt); 3056 struct fc_rport *rport; 3057 struct device *dev; 3058 unsigned long flags; 3059 int error; 3060 size_t size; 3061 3062 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); 3063 rport = kzalloc(size, GFP_KERNEL); 3064 if (unlikely(!rport)) { 3065 printk(KERN_ERR "%s: allocation failure\n", __func__); 3066 return NULL; 3067 } 3068 3069 rport->maxframe_size = -1; 3070 rport->supported_classes = FC_COS_UNSPECIFIED; 3071 rport->dev_loss_tmo = fc_host->dev_loss_tmo; 3072 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); 3073 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); 3074 rport->port_id = ids->port_id; 3075 rport->roles = ids->roles; 3076 rport->port_state = FC_PORTSTATE_ONLINE; 3077 if (fci->f->dd_fcrport_size) 3078 rport->dd_data = &rport[1]; 3079 rport->channel = channel; 3080 rport->fast_io_fail_tmo = -1; 3081 3082 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); 3083 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); 3084 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); 3085 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); 3086 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); 3087 3088 spin_lock_irqsave(shost->host_lock, flags); 3089 3090 rport->number = fc_host->next_rport_number++; 3091 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) || 3092 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) 3093 rport->scsi_target_id = fc_host->next_target_id++; 3094 else 3095 rport->scsi_target_id = -1; 3096 list_add_tail(&rport->peers, &fc_host->rports); 3097 scsi_host_get(shost); /* for fc_host->rport list */ 3098 3099 spin_unlock_irqrestore(shost->host_lock, flags); 3100 3101 dev = &rport->dev; 3102 device_initialize(dev); /* takes self reference */ 3103 dev->parent = get_device(&shost->shost_gendev); /* parent reference */ 3104 dev->release = fc_rport_dev_release; 3105 dev_set_name(dev, "rport-%d:%d-%d", 3106 shost->host_no, channel, rport->number); 3107 transport_setup_device(dev); 3108 3109 error = device_add(dev); 3110 if (error) { 3111 printk(KERN_ERR "FC Remote Port device_add failed\n"); 3112 goto delete_rport; 3113 } 3114 transport_add_device(dev); 3115 transport_configure_device(dev); 3116 3117 fc_bsg_rportadd(shost, rport); 3118 /* ignore any bsg add error - we just can't do sgio */ 3119 3120 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { 3121 /* initiate a scan of the target */ 3122 rport->flags |= FC_RPORT_SCAN_PENDING; 3123 scsi_queue_work(shost, &rport->scan_work); 3124 } 3125 3126 return rport; 3127 3128 delete_rport: 3129 transport_destroy_device(dev); 3130 spin_lock_irqsave(shost->host_lock, flags); 3131 list_del(&rport->peers); 3132 scsi_host_put(shost); /* for fc_host->rport list */ 3133 spin_unlock_irqrestore(shost->host_lock, flags); 3134 put_device(dev->parent); 3135 kfree(rport); 3136 return NULL; 3137 } 3138 3139 /** 3140 * fc_remote_port_add - notify fc transport of the existence of a remote FC port. 3141 * @shost: scsi host the remote port is connected to. 3142 * @channel: Channel on shost port connected to. 3143 * @ids: The world wide names, fc address, and FC4 port 3144 * roles for the remote port. 3145 * 3146 * The LLDD calls this routine to notify the transport of the existence 3147 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) 3148 * of the port, it's FC address (port_id), and the FC4 roles that are 3149 * active for the port. 3150 * 3151 * For ports that are FCP targets (aka scsi targets), the FC transport 3152 * maintains consistent target id bindings on behalf of the LLDD. 3153 * A consistent target id binding is an assignment of a target id to 3154 * a remote port identifier, which persists while the scsi host is 3155 * attached. The remote port can disappear, then later reappear, and 3156 * it's target id assignment remains the same. This allows for shifts 3157 * in FC addressing (if binding by wwpn or wwnn) with no apparent 3158 * changes to the scsi subsystem which is based on scsi host number and 3159 * target id values. Bindings are only valid during the attachment of 3160 * the scsi host. If the host detaches, then later re-attaches, target 3161 * id bindings may change. 3162 * 3163 * This routine is responsible for returning a remote port structure. 3164 * The routine will search the list of remote ports it maintains 3165 * internally on behalf of consistent target id mappings. If found, the 3166 * remote port structure will be reused. Otherwise, a new remote port 3167 * structure will be allocated. 3168 * 3169 * Whenever a remote port is allocated, a new fc_remote_port class 3170 * device is created. 3171 * 3172 * Should not be called from interrupt context. 3173 * 3174 * Notes: 3175 * This routine assumes no locks are held on entry. 3176 */ 3177 struct fc_rport * fc_remote_port_add(struct Scsi_Host * shost,int channel,struct fc_rport_identifiers * ids)3178 fc_remote_port_add(struct Scsi_Host *shost, int channel, 3179 struct fc_rport_identifiers *ids) 3180 { 3181 struct fc_internal *fci = to_fc_internal(shost->transportt); 3182 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3183 struct fc_rport *rport; 3184 unsigned long flags; 3185 int match = 0; 3186 3187 /* ensure any stgt delete functions are done */ 3188 fc_flush_work(shost); 3189 3190 /* 3191 * Search the list of "active" rports, for an rport that has been 3192 * deleted, but we've held off the real delete while the target 3193 * is in a "blocked" state. 3194 */ 3195 spin_lock_irqsave(shost->host_lock, flags); 3196 3197 list_for_each_entry(rport, &fc_host->rports, peers) { 3198 3199 if ((rport->port_state == FC_PORTSTATE_BLOCKED || 3200 rport->port_state == FC_PORTSTATE_NOTPRESENT) && 3201 (rport->channel == channel)) { 3202 3203 switch (fc_host->tgtid_bind_type) { 3204 case FC_TGTID_BIND_BY_WWPN: 3205 case FC_TGTID_BIND_NONE: 3206 if (rport->port_name == ids->port_name) 3207 match = 1; 3208 break; 3209 case FC_TGTID_BIND_BY_WWNN: 3210 if (rport->node_name == ids->node_name) 3211 match = 1; 3212 break; 3213 case FC_TGTID_BIND_BY_ID: 3214 if (rport->port_id == ids->port_id) 3215 match = 1; 3216 break; 3217 } 3218 3219 if (match) { 3220 3221 memcpy(&rport->node_name, &ids->node_name, 3222 sizeof(rport->node_name)); 3223 memcpy(&rport->port_name, &ids->port_name, 3224 sizeof(rport->port_name)); 3225 rport->port_id = ids->port_id; 3226 3227 rport->port_state = FC_PORTSTATE_ONLINE; 3228 rport->roles = ids->roles; 3229 3230 spin_unlock_irqrestore(shost->host_lock, flags); 3231 3232 if (fci->f->dd_fcrport_size) 3233 memset(rport->dd_data, 0, 3234 fci->f->dd_fcrport_size); 3235 3236 /* 3237 * If we were not a target, cancel the 3238 * io terminate and rport timers, and 3239 * we're done. 3240 * 3241 * If we were a target, but our new role 3242 * doesn't indicate a target, leave the 3243 * timers running expecting the role to 3244 * change as the target fully logs in. If 3245 * it doesn't, the target will be torn down. 3246 * 3247 * If we were a target, and our role shows 3248 * we're still a target, cancel the timers 3249 * and kick off a scan. 3250 */ 3251 3252 /* was a target, not in roles */ 3253 if ((rport->scsi_target_id != -1) && 3254 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) 3255 return rport; 3256 3257 /* 3258 * Stop the fail io and dev_loss timers. 3259 * If they flush, the port_state will 3260 * be checked and will NOOP the function. 3261 */ 3262 if (!cancel_delayed_work(&rport->fail_io_work)) 3263 fc_flush_devloss(shost); 3264 if (!cancel_delayed_work(&rport->dev_loss_work)) 3265 fc_flush_devloss(shost); 3266 3267 spin_lock_irqsave(shost->host_lock, flags); 3268 3269 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3270 FC_RPORT_DEVLOSS_PENDING | 3271 FC_RPORT_DEVLOSS_CALLBK_DONE); 3272 3273 spin_unlock_irqrestore(shost->host_lock, flags); 3274 3275 /* if target, initiate a scan */ 3276 if (rport->scsi_target_id != -1) { 3277 scsi_target_unblock(&rport->dev, 3278 SDEV_RUNNING); 3279 spin_lock_irqsave(shost->host_lock, 3280 flags); 3281 rport->flags |= FC_RPORT_SCAN_PENDING; 3282 scsi_queue_work(shost, 3283 &rport->scan_work); 3284 spin_unlock_irqrestore(shost->host_lock, 3285 flags); 3286 } 3287 3288 fc_bsg_goose_queue(rport); 3289 3290 return rport; 3291 } 3292 } 3293 } 3294 3295 /* 3296 * Search the bindings array 3297 * Note: if never a FCP target, you won't be on this list 3298 */ 3299 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { 3300 3301 /* search for a matching consistent binding */ 3302 3303 list_for_each_entry(rport, &fc_host->rport_bindings, 3304 peers) { 3305 if (rport->channel != channel) 3306 continue; 3307 3308 switch (fc_host->tgtid_bind_type) { 3309 case FC_TGTID_BIND_BY_WWPN: 3310 if (rport->port_name == ids->port_name) 3311 match = 1; 3312 break; 3313 case FC_TGTID_BIND_BY_WWNN: 3314 if (rport->node_name == ids->node_name) 3315 match = 1; 3316 break; 3317 case FC_TGTID_BIND_BY_ID: 3318 if (rport->port_id == ids->port_id) 3319 match = 1; 3320 break; 3321 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3322 break; 3323 } 3324 3325 if (match) { 3326 list_move_tail(&rport->peers, &fc_host->rports); 3327 break; 3328 } 3329 } 3330 3331 if (match) { 3332 memcpy(&rport->node_name, &ids->node_name, 3333 sizeof(rport->node_name)); 3334 memcpy(&rport->port_name, &ids->port_name, 3335 sizeof(rport->port_name)); 3336 rport->port_id = ids->port_id; 3337 rport->port_state = FC_PORTSTATE_ONLINE; 3338 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3339 3340 if (fci->f->dd_fcrport_size) 3341 memset(rport->dd_data, 0, 3342 fci->f->dd_fcrport_size); 3343 spin_unlock_irqrestore(shost->host_lock, flags); 3344 3345 fc_remote_port_rolechg(rport, ids->roles); 3346 return rport; 3347 } 3348 } 3349 3350 spin_unlock_irqrestore(shost->host_lock, flags); 3351 3352 /* No consistent binding found - create new remote port entry */ 3353 rport = fc_remote_port_create(shost, channel, ids); 3354 3355 return rport; 3356 } 3357 EXPORT_SYMBOL(fc_remote_port_add); 3358 3359 3360 /** 3361 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. 3362 * @rport: The remote port that no longer exists 3363 * 3364 * The LLDD calls this routine to notify the transport that a remote 3365 * port is no longer part of the topology. Note: Although a port 3366 * may no longer be part of the topology, it may persist in the remote 3367 * ports displayed by the fc_host. We do this under 2 conditions: 3368 * 3369 * 1) If the port was a scsi target, we delay its deletion by "blocking" it. 3370 * This allows the port to temporarily disappear, then reappear without 3371 * disrupting the SCSI device tree attached to it. During the "blocked" 3372 * period the port will still exist. 3373 * 3374 * 2) If the port was a scsi target and disappears for longer than we 3375 * expect, we'll delete the port and the tear down the SCSI device tree 3376 * attached to it. However, we want to semi-persist the target id assigned 3377 * to that port if it eventually does exist. The port structure will 3378 * remain (although with minimal information) so that the target id 3379 * bindings also remain. 3380 * 3381 * If the remote port is not an FCP Target, it will be fully torn down 3382 * and deallocated, including the fc_remote_port class device. 3383 * 3384 * If the remote port is an FCP Target, the port will be placed in a 3385 * temporary blocked state. From the LLDD's perspective, the rport no 3386 * longer exists. From the SCSI midlayer's perspective, the SCSI target 3387 * exists, but all sdevs on it are blocked from further I/O. The following 3388 * is then expected. 3389 * 3390 * If the remote port does not return (signaled by a LLDD call to 3391 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the 3392 * scsi target is removed - killing all outstanding i/o and removing the 3393 * scsi devices attached to it. The port structure will be marked Not 3394 * Present and be partially cleared, leaving only enough information to 3395 * recognize the remote port relative to the scsi target id binding if 3396 * it later appears. The port will remain as long as there is a valid 3397 * binding (e.g. until the user changes the binding type or unloads the 3398 * scsi host with the binding). 3399 * 3400 * If the remote port returns within the dev_loss_tmo value (and matches 3401 * according to the target id binding type), the port structure will be 3402 * reused. If it is no longer a SCSI target, the target will be torn 3403 * down. If it continues to be a SCSI target, then the target will be 3404 * unblocked (allowing i/o to be resumed), and a scan will be activated 3405 * to ensure that all luns are detected. 3406 * 3407 * Called from normal process context only - cannot be called from interrupt. 3408 * 3409 * Notes: 3410 * This routine assumes no locks are held on entry. 3411 */ 3412 void fc_remote_port_delete(struct fc_rport * rport)3413 fc_remote_port_delete(struct fc_rport *rport) 3414 { 3415 struct Scsi_Host *shost = rport_to_shost(rport); 3416 unsigned long timeout = rport->dev_loss_tmo; 3417 unsigned long flags; 3418 3419 /* 3420 * No need to flush the fc_host work_q's, as all adds are synchronous. 3421 * 3422 * We do need to reclaim the rport scan work element, so eventually 3423 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if 3424 * there's still a scan pending. 3425 */ 3426 3427 spin_lock_irqsave(shost->host_lock, flags); 3428 3429 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3430 (rport->port_state != FC_PORTSTATE_MARGINAL)) { 3431 spin_unlock_irqrestore(shost->host_lock, flags); 3432 return; 3433 } 3434 3435 /* 3436 * In the past, we if this was not an FCP-Target, we would 3437 * unconditionally just jump to deleting the rport. 3438 * However, rports can be used as node containers by the LLDD, 3439 * and its not appropriate to just terminate the rport at the 3440 * first sign of a loss in connectivity. The LLDD may want to 3441 * send ELS traffic to re-validate the login. If the rport is 3442 * immediately deleted, it makes it inappropriate for a node 3443 * container. 3444 * So... we now unconditionally wait dev_loss_tmo before 3445 * destroying an rport. 3446 */ 3447 3448 rport->port_state = FC_PORTSTATE_BLOCKED; 3449 3450 rport->flags |= FC_RPORT_DEVLOSS_PENDING; 3451 3452 spin_unlock_irqrestore(shost->host_lock, flags); 3453 3454 scsi_block_targets(shost, &rport->dev); 3455 3456 /* see if we need to kill io faster than waiting for device loss */ 3457 if ((rport->fast_io_fail_tmo != -1) && 3458 (rport->fast_io_fail_tmo < timeout)) 3459 fc_queue_devloss_work(shost, &rport->fail_io_work, 3460 rport->fast_io_fail_tmo * HZ); 3461 3462 /* cap the length the devices can be blocked until they are deleted */ 3463 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); 3464 } 3465 EXPORT_SYMBOL(fc_remote_port_delete); 3466 3467 /** 3468 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. 3469 * @rport: The remote port that changed. 3470 * @roles: New roles for this port. 3471 * 3472 * Description: The LLDD calls this routine to notify the transport that the 3473 * roles on a remote port may have changed. The largest effect of this is 3474 * if a port now becomes a FCP Target, it must be allocated a 3475 * scsi target id. If the port is no longer a FCP target, any 3476 * scsi target id value assigned to it will persist in case the 3477 * role changes back to include FCP Target. No changes in the scsi 3478 * midlayer will be invoked if the role changes (in the expectation 3479 * that the role will be resumed. If it doesn't normal error processing 3480 * will take place). 3481 * 3482 * Should not be called from interrupt context. 3483 * 3484 * Notes: 3485 * This routine assumes no locks are held on entry. 3486 */ 3487 void fc_remote_port_rolechg(struct fc_rport * rport,u32 roles)3488 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) 3489 { 3490 struct Scsi_Host *shost = rport_to_shost(rport); 3491 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3492 unsigned long flags; 3493 int create = 0; 3494 3495 spin_lock_irqsave(shost->host_lock, flags); 3496 if (roles & FC_PORT_ROLE_FCP_TARGET) { 3497 if (rport->scsi_target_id == -1) { 3498 rport->scsi_target_id = fc_host->next_target_id++; 3499 create = 1; 3500 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) 3501 create = 1; 3502 } 3503 3504 rport->roles = roles; 3505 3506 spin_unlock_irqrestore(shost->host_lock, flags); 3507 3508 if (create) { 3509 /* 3510 * There may have been a delete timer running on the 3511 * port. Ensure that it is cancelled as we now know 3512 * the port is an FCP Target. 3513 * Note: we know the rport exists and is in an online 3514 * state as the LLDD would not have had an rport 3515 * reference to pass us. 3516 * 3517 * Take no action on the del_timer failure as the state 3518 * machine state change will validate the 3519 * transaction. 3520 */ 3521 if (!cancel_delayed_work(&rport->fail_io_work)) 3522 fc_flush_devloss(shost); 3523 if (!cancel_delayed_work(&rport->dev_loss_work)) 3524 fc_flush_devloss(shost); 3525 3526 spin_lock_irqsave(shost->host_lock, flags); 3527 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | 3528 FC_RPORT_DEVLOSS_PENDING | 3529 FC_RPORT_DEVLOSS_CALLBK_DONE); 3530 spin_unlock_irqrestore(shost->host_lock, flags); 3531 3532 /* ensure any stgt delete functions are done */ 3533 fc_flush_work(shost); 3534 3535 scsi_target_unblock(&rport->dev, SDEV_RUNNING); 3536 /* initiate a scan of the target */ 3537 spin_lock_irqsave(shost->host_lock, flags); 3538 rport->flags |= FC_RPORT_SCAN_PENDING; 3539 scsi_queue_work(shost, &rport->scan_work); 3540 spin_unlock_irqrestore(shost->host_lock, flags); 3541 } 3542 } 3543 EXPORT_SYMBOL(fc_remote_port_rolechg); 3544 3545 /** 3546 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. 3547 * @work: rport target that failed to reappear in the allotted time. 3548 * 3549 * Description: An attempt to delete a remote port blocks, and if it fails 3550 * to return in the allotted time this gets called. 3551 */ 3552 static void fc_timeout_deleted_rport(struct work_struct * work)3553 fc_timeout_deleted_rport(struct work_struct *work) 3554 { 3555 struct fc_rport *rport = 3556 container_of(work, struct fc_rport, dev_loss_work.work); 3557 struct Scsi_Host *shost = rport_to_shost(rport); 3558 struct fc_internal *i = to_fc_internal(shost->transportt); 3559 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3560 unsigned long flags; 3561 int do_callback = 0; 3562 3563 spin_lock_irqsave(shost->host_lock, flags); 3564 3565 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; 3566 3567 /* 3568 * If the port is ONLINE, then it came back. If it was a SCSI 3569 * target, validate it still is. If not, tear down the 3570 * scsi_target on it. 3571 */ 3572 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3573 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3574 (rport->scsi_target_id != -1) && 3575 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { 3576 dev_printk(KERN_ERR, &rport->dev, 3577 "blocked FC remote port time out: no longer" 3578 " a FCP target, removing starget\n"); 3579 spin_unlock_irqrestore(shost->host_lock, flags); 3580 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); 3581 fc_queue_work(shost, &rport->stgt_delete_work); 3582 return; 3583 } 3584 3585 /* NOOP state - we're flushing workq's */ 3586 if (rport->port_state != FC_PORTSTATE_BLOCKED) { 3587 spin_unlock_irqrestore(shost->host_lock, flags); 3588 dev_printk(KERN_ERR, &rport->dev, 3589 "blocked FC remote port time out: leaving" 3590 " rport%s alone\n", 3591 (rport->scsi_target_id != -1) ? " and starget" : ""); 3592 return; 3593 } 3594 3595 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || 3596 (rport->scsi_target_id == -1)) { 3597 list_del(&rport->peers); 3598 rport->port_state = FC_PORTSTATE_DELETED; 3599 dev_printk(KERN_ERR, &rport->dev, 3600 "blocked FC remote port time out: removing" 3601 " rport%s\n", 3602 (rport->scsi_target_id != -1) ? " and starget" : ""); 3603 fc_queue_work(shost, &rport->rport_delete_work); 3604 spin_unlock_irqrestore(shost->host_lock, flags); 3605 return; 3606 } 3607 3608 dev_printk(KERN_ERR, &rport->dev, 3609 "blocked FC remote port time out: removing target and " 3610 "saving binding\n"); 3611 3612 list_move_tail(&rport->peers, &fc_host->rport_bindings); 3613 3614 /* 3615 * Note: We do not remove or clear the hostdata area. This allows 3616 * host-specific target data to persist along with the 3617 * scsi_target_id. It's up to the host to manage it's hostdata area. 3618 */ 3619 3620 /* 3621 * Reinitialize port attributes that may change if the port comes back. 3622 */ 3623 rport->maxframe_size = -1; 3624 rport->supported_classes = FC_COS_UNSPECIFIED; 3625 rport->roles = FC_PORT_ROLE_UNKNOWN; 3626 rport->port_state = FC_PORTSTATE_NOTPRESENT; 3627 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; 3628 3629 /* 3630 * Pre-emptively kill I/O rather than waiting for the work queue 3631 * item to teardown the starget. (FCOE libFC folks prefer this 3632 * and to have the rport_port_id still set when it's done). 3633 */ 3634 spin_unlock_irqrestore(shost->host_lock, flags); 3635 fc_terminate_rport_io(rport); 3636 3637 spin_lock_irqsave(shost->host_lock, flags); 3638 3639 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ 3640 3641 /* remove the identifiers that aren't used in the consisting binding */ 3642 switch (fc_host->tgtid_bind_type) { 3643 case FC_TGTID_BIND_BY_WWPN: 3644 rport->node_name = -1; 3645 rport->port_id = -1; 3646 break; 3647 case FC_TGTID_BIND_BY_WWNN: 3648 rport->port_name = -1; 3649 rport->port_id = -1; 3650 break; 3651 case FC_TGTID_BIND_BY_ID: 3652 rport->node_name = -1; 3653 rport->port_name = -1; 3654 break; 3655 case FC_TGTID_BIND_NONE: /* to keep compiler happy */ 3656 break; 3657 } 3658 3659 /* 3660 * As this only occurs if the remote port (scsi target) 3661 * went away and didn't come back - we'll remove 3662 * all attached scsi devices. 3663 */ 3664 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; 3665 fc_queue_work(shost, &rport->stgt_delete_work); 3666 3667 do_callback = 1; 3668 } 3669 3670 spin_unlock_irqrestore(shost->host_lock, flags); 3671 3672 /* 3673 * Notify the driver that the rport is now dead. The LLDD will 3674 * also guarantee that any communication to the rport is terminated 3675 * 3676 * Note: we set the CALLBK_DONE flag above to correspond 3677 */ 3678 if (do_callback && i->f->dev_loss_tmo_callbk) 3679 i->f->dev_loss_tmo_callbk(rport); 3680 } 3681 3682 3683 /** 3684 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. 3685 * @work: rport to terminate io on. 3686 * 3687 * Notes: Only requests the failure of the io, not that all are flushed 3688 * prior to returning. 3689 */ 3690 static void fc_timeout_fail_rport_io(struct work_struct * work)3691 fc_timeout_fail_rport_io(struct work_struct *work) 3692 { 3693 struct fc_rport *rport = 3694 container_of(work, struct fc_rport, fail_io_work.work); 3695 3696 if (rport->port_state != FC_PORTSTATE_BLOCKED) 3697 return; 3698 3699 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; 3700 fc_terminate_rport_io(rport); 3701 } 3702 3703 /** 3704 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. 3705 * @work: remote port to be scanned. 3706 */ 3707 static void fc_scsi_scan_rport(struct work_struct * work)3708 fc_scsi_scan_rport(struct work_struct *work) 3709 { 3710 struct fc_rport *rport = 3711 container_of(work, struct fc_rport, scan_work); 3712 struct Scsi_Host *shost = rport_to_shost(rport); 3713 struct fc_internal *i = to_fc_internal(shost->transportt); 3714 unsigned long flags; 3715 3716 if (((rport->port_state == FC_PORTSTATE_ONLINE) || 3717 (rport->port_state == FC_PORTSTATE_MARGINAL)) && 3718 (rport->roles & FC_PORT_ROLE_FCP_TARGET) && 3719 !(i->f->disable_target_scan)) { 3720 scsi_scan_target(&rport->dev, rport->channel, 3721 rport->scsi_target_id, SCAN_WILD_CARD, 3722 SCSI_SCAN_RESCAN); 3723 } 3724 3725 spin_lock_irqsave(shost->host_lock, flags); 3726 rport->flags &= ~FC_RPORT_SCAN_PENDING; 3727 spin_unlock_irqrestore(shost->host_lock, flags); 3728 } 3729 3730 /** 3731 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport. 3732 * @rport: Remote port that scsi_eh is trying to recover. 3733 * 3734 * This routine can be called from a FC LLD scsi_eh callback. It 3735 * blocks the scsi_eh thread until the fc_rport leaves the 3736 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3737 * necessary to avoid the scsi_eh failing recovery actions for blocked 3738 * rports which would lead to offlined SCSI devices. 3739 * 3740 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3741 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3742 * passed back to scsi_eh. 3743 */ fc_block_rport(struct fc_rport * rport)3744 int fc_block_rport(struct fc_rport *rport) 3745 { 3746 struct Scsi_Host *shost = rport_to_shost(rport); 3747 unsigned long flags; 3748 3749 spin_lock_irqsave(shost->host_lock, flags); 3750 while (rport->port_state == FC_PORTSTATE_BLOCKED && 3751 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { 3752 spin_unlock_irqrestore(shost->host_lock, flags); 3753 msleep(1000); 3754 spin_lock_irqsave(shost->host_lock, flags); 3755 } 3756 spin_unlock_irqrestore(shost->host_lock, flags); 3757 3758 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) 3759 return FAST_IO_FAIL; 3760 3761 return 0; 3762 } 3763 EXPORT_SYMBOL(fc_block_rport); 3764 3765 /** 3766 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport 3767 * @cmnd: SCSI command that scsi_eh is trying to recover 3768 * 3769 * This routine can be called from a FC LLD scsi_eh callback. It 3770 * blocks the scsi_eh thread until the fc_rport leaves the 3771 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is 3772 * necessary to avoid the scsi_eh failing recovery actions for blocked 3773 * rports which would lead to offlined SCSI devices. 3774 * 3775 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. 3776 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be 3777 * passed back to scsi_eh. 3778 */ fc_block_scsi_eh(struct scsi_cmnd * cmnd)3779 int fc_block_scsi_eh(struct scsi_cmnd *cmnd) 3780 { 3781 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3782 3783 if (WARN_ON_ONCE(!rport)) 3784 return FAST_IO_FAIL; 3785 3786 return fc_block_rport(rport); 3787 } 3788 EXPORT_SYMBOL(fc_block_scsi_eh); 3789 3790 /* 3791 * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not 3792 * @scmd: The SCSI command to be checked 3793 * 3794 * This checks the rport state to decide if a cmd is 3795 * retryable. 3796 * 3797 * Returns: true if the rport state is not in marginal state. 3798 */ fc_eh_should_retry_cmd(struct scsi_cmnd * scmd)3799 bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd) 3800 { 3801 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); 3802 3803 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 3804 (scsi_cmd_to_rq(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT)) { 3805 set_host_byte(scmd, DID_TRANSPORT_MARGINAL); 3806 return false; 3807 } 3808 return true; 3809 } 3810 EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd); 3811 3812 /** 3813 * fc_vport_setup - allocates and creates a FC virtual port. 3814 * @shost: scsi host the virtual port is connected to. 3815 * @channel: Channel on shost port connected to. 3816 * @pdev: parent device for vport 3817 * @ids: The world wide names, FC4 port roles, etc for 3818 * the virtual port. 3819 * @ret_vport: The pointer to the created vport. 3820 * 3821 * Allocates and creates the vport structure, calls the parent host 3822 * to instantiate the vport, this completes w/ class and sysfs creation. 3823 * 3824 * Notes: 3825 * This routine assumes no locks are held on entry. 3826 */ 3827 static int fc_vport_setup(struct Scsi_Host * shost,int channel,struct device * pdev,struct fc_vport_identifiers * ids,struct fc_vport ** ret_vport)3828 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, 3829 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) 3830 { 3831 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3832 struct fc_internal *fci = to_fc_internal(shost->transportt); 3833 struct fc_vport *vport; 3834 struct device *dev; 3835 unsigned long flags; 3836 size_t size; 3837 int error; 3838 3839 *ret_vport = NULL; 3840 3841 if ( ! fci->f->vport_create) 3842 return -ENOENT; 3843 3844 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); 3845 vport = kzalloc(size, GFP_KERNEL); 3846 if (unlikely(!vport)) { 3847 printk(KERN_ERR "%s: allocation failure\n", __func__); 3848 return -ENOMEM; 3849 } 3850 3851 vport->vport_state = FC_VPORT_UNKNOWN; 3852 vport->vport_last_state = FC_VPORT_UNKNOWN; 3853 vport->node_name = ids->node_name; 3854 vport->port_name = ids->port_name; 3855 vport->roles = ids->roles; 3856 vport->vport_type = ids->vport_type; 3857 if (fci->f->dd_fcvport_size) 3858 vport->dd_data = &vport[1]; 3859 vport->shost = shost; 3860 vport->channel = channel; 3861 vport->flags = FC_VPORT_CREATING; 3862 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); 3863 3864 spin_lock_irqsave(shost->host_lock, flags); 3865 3866 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { 3867 spin_unlock_irqrestore(shost->host_lock, flags); 3868 kfree(vport); 3869 return -ENOSPC; 3870 } 3871 fc_host->npiv_vports_inuse++; 3872 vport->number = fc_host->next_vport_number++; 3873 list_add_tail(&vport->peers, &fc_host->vports); 3874 scsi_host_get(shost); /* for fc_host->vport list */ 3875 3876 spin_unlock_irqrestore(shost->host_lock, flags); 3877 3878 dev = &vport->dev; 3879 device_initialize(dev); /* takes self reference */ 3880 dev->parent = get_device(pdev); /* takes parent reference */ 3881 dev->release = fc_vport_dev_release; 3882 dev_set_name(dev, "vport-%d:%d-%d", 3883 shost->host_no, channel, vport->number); 3884 transport_setup_device(dev); 3885 3886 error = device_add(dev); 3887 if (error) { 3888 printk(KERN_ERR "FC Virtual Port device_add failed\n"); 3889 goto delete_vport; 3890 } 3891 transport_add_device(dev); 3892 transport_configure_device(dev); 3893 3894 error = fci->f->vport_create(vport, ids->disable); 3895 if (error) { 3896 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); 3897 goto delete_vport_all; 3898 } 3899 3900 /* 3901 * if the parent isn't the physical adapter's Scsi_Host, ensure 3902 * the Scsi_Host at least contains a symlink to the vport. 3903 */ 3904 if (pdev != &shost->shost_gendev) { 3905 error = sysfs_create_link(&shost->shost_gendev.kobj, 3906 &dev->kobj, dev_name(dev)); 3907 if (error) 3908 printk(KERN_ERR 3909 "%s: Cannot create vport symlinks for " 3910 "%s, err=%d\n", 3911 __func__, dev_name(dev), error); 3912 } 3913 spin_lock_irqsave(shost->host_lock, flags); 3914 vport->flags &= ~FC_VPORT_CREATING; 3915 spin_unlock_irqrestore(shost->host_lock, flags); 3916 3917 dev_printk(KERN_NOTICE, pdev, 3918 "%s created via shost%d channel %d\n", dev_name(dev), 3919 shost->host_no, channel); 3920 3921 *ret_vport = vport; 3922 3923 return 0; 3924 3925 delete_vport_all: 3926 transport_remove_device(dev); 3927 device_del(dev); 3928 delete_vport: 3929 transport_destroy_device(dev); 3930 spin_lock_irqsave(shost->host_lock, flags); 3931 list_del(&vport->peers); 3932 scsi_host_put(shost); /* for fc_host->vport list */ 3933 fc_host->npiv_vports_inuse--; 3934 spin_unlock_irqrestore(shost->host_lock, flags); 3935 put_device(dev->parent); 3936 kfree(vport); 3937 3938 return error; 3939 } 3940 3941 /** 3942 * fc_vport_create - Admin App or LLDD requests creation of a vport 3943 * @shost: scsi host the virtual port is connected to. 3944 * @channel: channel on shost port connected to. 3945 * @ids: The world wide names, FC4 port roles, etc for 3946 * the virtual port. 3947 * 3948 * Notes: 3949 * This routine assumes no locks are held on entry. 3950 */ 3951 struct fc_vport * fc_vport_create(struct Scsi_Host * shost,int channel,struct fc_vport_identifiers * ids)3952 fc_vport_create(struct Scsi_Host *shost, int channel, 3953 struct fc_vport_identifiers *ids) 3954 { 3955 int stat; 3956 struct fc_vport *vport; 3957 3958 stat = fc_vport_setup(shost, channel, &shost->shost_gendev, 3959 ids, &vport); 3960 return stat ? NULL : vport; 3961 } 3962 EXPORT_SYMBOL(fc_vport_create); 3963 3964 /** 3965 * fc_vport_terminate - Admin App or LLDD requests termination of a vport 3966 * @vport: fc_vport to be terminated 3967 * 3968 * Calls the LLDD vport_delete() function, then deallocates and removes 3969 * the vport from the shost and object tree. 3970 * 3971 * Notes: 3972 * This routine assumes no locks are held on entry. 3973 */ 3974 int fc_vport_terminate(struct fc_vport * vport)3975 fc_vport_terminate(struct fc_vport *vport) 3976 { 3977 struct Scsi_Host *shost = vport_to_shost(vport); 3978 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); 3979 struct fc_internal *i = to_fc_internal(shost->transportt); 3980 struct device *dev = &vport->dev; 3981 unsigned long flags; 3982 int stat; 3983 3984 if (i->f->vport_delete) 3985 stat = i->f->vport_delete(vport); 3986 else 3987 stat = -ENOENT; 3988 3989 spin_lock_irqsave(shost->host_lock, flags); 3990 vport->flags &= ~FC_VPORT_DELETING; 3991 if (!stat) { 3992 vport->flags |= FC_VPORT_DELETED; 3993 list_del(&vport->peers); 3994 fc_host->npiv_vports_inuse--; 3995 scsi_host_put(shost); /* for fc_host->vport list */ 3996 } 3997 spin_unlock_irqrestore(shost->host_lock, flags); 3998 3999 if (stat) 4000 return stat; 4001 4002 if (dev->parent != &shost->shost_gendev) 4003 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); 4004 transport_remove_device(dev); 4005 device_del(dev); 4006 transport_destroy_device(dev); 4007 4008 /* 4009 * Removing our self-reference should mean our 4010 * release function gets called, which will drop the remaining 4011 * parent reference and free the data structure. 4012 */ 4013 put_device(dev); /* for self-reference */ 4014 4015 return 0; /* SUCCESS */ 4016 } 4017 EXPORT_SYMBOL(fc_vport_terminate); 4018 4019 /** 4020 * fc_vport_sched_delete - workq-based delete request for a vport 4021 * @work: vport to be deleted. 4022 */ 4023 static void fc_vport_sched_delete(struct work_struct * work)4024 fc_vport_sched_delete(struct work_struct *work) 4025 { 4026 struct fc_vport *vport = 4027 container_of(work, struct fc_vport, vport_delete_work); 4028 int stat; 4029 4030 stat = fc_vport_terminate(vport); 4031 if (stat) 4032 dev_printk(KERN_ERR, vport->dev.parent, 4033 "%s: %s could not be deleted created via " 4034 "shost%d channel %d - error %d\n", __func__, 4035 dev_name(&vport->dev), vport->shost->host_no, 4036 vport->channel, stat); 4037 } 4038 4039 4040 /* 4041 * BSG support 4042 */ 4043 4044 /** 4045 * fc_bsg_job_timeout - handler for when a bsg request timesout 4046 * @req: request that timed out 4047 */ 4048 static enum blk_eh_timer_return fc_bsg_job_timeout(struct request * req)4049 fc_bsg_job_timeout(struct request *req) 4050 { 4051 struct bsg_job *job = blk_mq_rq_to_pdu(req); 4052 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4053 struct fc_rport *rport = fc_bsg_to_rport(job); 4054 struct fc_internal *i = to_fc_internal(shost->transportt); 4055 int err = 0, inflight = 0; 4056 4057 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) 4058 return BLK_EH_RESET_TIMER; 4059 4060 inflight = bsg_job_get(job); 4061 4062 if (inflight && i->f->bsg_timeout) { 4063 /* call LLDD to abort the i/o as it has timed out */ 4064 err = i->f->bsg_timeout(job); 4065 if (err == -EAGAIN) { 4066 bsg_job_put(job); 4067 return BLK_EH_RESET_TIMER; 4068 } else if (err) 4069 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " 4070 "abort failed with status %d\n", err); 4071 } 4072 4073 /* the blk_end_sync_io() doesn't check the error */ 4074 if (inflight) 4075 blk_mq_end_request(req, BLK_STS_IOERR); 4076 return BLK_EH_DONE; 4077 } 4078 4079 /** 4080 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD 4081 * @shost: scsi host rport attached to 4082 * @job: bsg job to be processed 4083 */ fc_bsg_host_dispatch(struct Scsi_Host * shost,struct bsg_job * job)4084 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4085 { 4086 struct fc_internal *i = to_fc_internal(shost->transportt); 4087 struct fc_bsg_request *bsg_request = job->request; 4088 struct fc_bsg_reply *bsg_reply = job->reply; 4089 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4090 int ret; 4091 4092 /* check if we really have all the request data needed */ 4093 if (job->request_len < cmdlen) { 4094 ret = -ENOMSG; 4095 goto fail_host_msg; 4096 } 4097 4098 /* Validate the host command */ 4099 switch (bsg_request->msgcode) { 4100 case FC_BSG_HST_ADD_RPORT: 4101 cmdlen += sizeof(struct fc_bsg_host_add_rport); 4102 break; 4103 4104 case FC_BSG_HST_DEL_RPORT: 4105 cmdlen += sizeof(struct fc_bsg_host_del_rport); 4106 break; 4107 4108 case FC_BSG_HST_ELS_NOLOGIN: 4109 cmdlen += sizeof(struct fc_bsg_host_els); 4110 /* there better be a xmt and rcv payloads */ 4111 if ((!job->request_payload.payload_len) || 4112 (!job->reply_payload.payload_len)) { 4113 ret = -EINVAL; 4114 goto fail_host_msg; 4115 } 4116 break; 4117 4118 case FC_BSG_HST_CT: 4119 cmdlen += sizeof(struct fc_bsg_host_ct); 4120 /* there better be xmt and rcv payloads */ 4121 if ((!job->request_payload.payload_len) || 4122 (!job->reply_payload.payload_len)) { 4123 ret = -EINVAL; 4124 goto fail_host_msg; 4125 } 4126 break; 4127 4128 case FC_BSG_HST_VENDOR: 4129 cmdlen += sizeof(struct fc_bsg_host_vendor); 4130 if ((shost->hostt->vendor_id == 0L) || 4131 (bsg_request->rqst_data.h_vendor.vendor_id != 4132 shost->hostt->vendor_id)) { 4133 ret = -ESRCH; 4134 goto fail_host_msg; 4135 } 4136 break; 4137 4138 default: 4139 ret = -EBADR; 4140 goto fail_host_msg; 4141 } 4142 4143 ret = i->f->bsg_request(job); 4144 if (!ret) 4145 return 0; 4146 4147 fail_host_msg: 4148 /* return the errno failure code as the only status */ 4149 BUG_ON(job->reply_len < sizeof(uint32_t)); 4150 bsg_reply->reply_payload_rcv_len = 0; 4151 bsg_reply->result = ret; 4152 job->reply_len = sizeof(uint32_t); 4153 bsg_job_done(job, bsg_reply->result, 4154 bsg_reply->reply_payload_rcv_len); 4155 return 0; 4156 } 4157 4158 4159 /* 4160 * fc_bsg_goose_queue - restart rport queue in case it was stopped 4161 * @rport: rport to be restarted 4162 */ 4163 static void fc_bsg_goose_queue(struct fc_rport * rport)4164 fc_bsg_goose_queue(struct fc_rport *rport) 4165 { 4166 struct request_queue *q = rport->rqst_q; 4167 4168 if (q) 4169 blk_mq_run_hw_queues(q, true); 4170 } 4171 4172 /** 4173 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD 4174 * @shost: scsi host rport attached to 4175 * @job: bsg job to be processed 4176 */ fc_bsg_rport_dispatch(struct Scsi_Host * shost,struct bsg_job * job)4177 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) 4178 { 4179 struct fc_internal *i = to_fc_internal(shost->transportt); 4180 struct fc_bsg_request *bsg_request = job->request; 4181 struct fc_bsg_reply *bsg_reply = job->reply; 4182 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 4183 int ret; 4184 4185 /* check if we really have all the request data needed */ 4186 if (job->request_len < cmdlen) { 4187 ret = -ENOMSG; 4188 goto fail_rport_msg; 4189 } 4190 4191 /* Validate the rport command */ 4192 switch (bsg_request->msgcode) { 4193 case FC_BSG_RPT_ELS: 4194 cmdlen += sizeof(struct fc_bsg_rport_els); 4195 goto check_bidi; 4196 4197 case FC_BSG_RPT_CT: 4198 cmdlen += sizeof(struct fc_bsg_rport_ct); 4199 check_bidi: 4200 /* there better be xmt and rcv payloads */ 4201 if ((!job->request_payload.payload_len) || 4202 (!job->reply_payload.payload_len)) { 4203 ret = -EINVAL; 4204 goto fail_rport_msg; 4205 } 4206 break; 4207 default: 4208 ret = -EBADR; 4209 goto fail_rport_msg; 4210 } 4211 4212 ret = i->f->bsg_request(job); 4213 if (!ret) 4214 return 0; 4215 4216 fail_rport_msg: 4217 /* return the errno failure code as the only status */ 4218 BUG_ON(job->reply_len < sizeof(uint32_t)); 4219 bsg_reply->reply_payload_rcv_len = 0; 4220 bsg_reply->result = ret; 4221 job->reply_len = sizeof(uint32_t); 4222 bsg_job_done(job, bsg_reply->result, 4223 bsg_reply->reply_payload_rcv_len); 4224 return 0; 4225 } 4226 fc_bsg_dispatch(struct bsg_job * job)4227 static int fc_bsg_dispatch(struct bsg_job *job) 4228 { 4229 struct Scsi_Host *shost = fc_bsg_to_shost(job); 4230 4231 if (scsi_is_fc_rport(job->dev)) 4232 return fc_bsg_rport_dispatch(shost, job); 4233 else 4234 return fc_bsg_host_dispatch(shost, job); 4235 } 4236 fc_bsg_rport_prep(struct fc_rport * rport)4237 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport) 4238 { 4239 if (rport->port_state == FC_PORTSTATE_BLOCKED && 4240 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) 4241 return BLK_STS_RESOURCE; 4242 4243 if ((rport->port_state != FC_PORTSTATE_ONLINE) && 4244 (rport->port_state != FC_PORTSTATE_MARGINAL)) 4245 return BLK_STS_IOERR; 4246 4247 return BLK_STS_OK; 4248 } 4249 4250 fc_bsg_dispatch_prep(struct bsg_job * job)4251 static int fc_bsg_dispatch_prep(struct bsg_job *job) 4252 { 4253 struct fc_rport *rport = fc_bsg_to_rport(job); 4254 blk_status_t ret; 4255 4256 ret = fc_bsg_rport_prep(rport); 4257 switch (ret) { 4258 case BLK_STS_OK: 4259 break; 4260 case BLK_STS_RESOURCE: 4261 return -EAGAIN; 4262 default: 4263 return -EIO; 4264 } 4265 4266 return fc_bsg_dispatch(job); 4267 } 4268 4269 /** 4270 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests 4271 * @shost: shost for fc_host 4272 * @fc_host: fc_host adding the structures to 4273 */ 4274 static int fc_bsg_hostadd(struct Scsi_Host * shost,struct fc_host_attrs * fc_host)4275 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) 4276 { 4277 struct device *dev = &shost->shost_gendev; 4278 struct fc_internal *i = to_fc_internal(shost->transportt); 4279 struct request_queue *q; 4280 char bsg_name[20]; 4281 4282 fc_host->rqst_q = NULL; 4283 4284 if (!i->f->bsg_request) 4285 return -ENOTSUPP; 4286 4287 snprintf(bsg_name, sizeof(bsg_name), 4288 "fc_host%d", shost->host_no); 4289 4290 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout, 4291 i->f->dd_bsg_size); 4292 if (IS_ERR(q)) { 4293 dev_err(dev, 4294 "fc_host%d: bsg interface failed to initialize - setup queue\n", 4295 shost->host_no); 4296 return PTR_ERR(q); 4297 } 4298 __scsi_init_queue(shost, q); 4299 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 4300 fc_host->rqst_q = q; 4301 return 0; 4302 } 4303 4304 /** 4305 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests 4306 * @shost: shost that rport is attached to 4307 * @rport: rport that the bsg hooks are being attached to 4308 */ 4309 static int fc_bsg_rportadd(struct Scsi_Host * shost,struct fc_rport * rport)4310 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) 4311 { 4312 struct device *dev = &rport->dev; 4313 struct fc_internal *i = to_fc_internal(shost->transportt); 4314 struct request_queue *q; 4315 4316 rport->rqst_q = NULL; 4317 4318 if (!i->f->bsg_request) 4319 return -ENOTSUPP; 4320 4321 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep, 4322 fc_bsg_job_timeout, i->f->dd_bsg_size); 4323 if (IS_ERR(q)) { 4324 dev_err(dev, "failed to setup bsg queue\n"); 4325 return PTR_ERR(q); 4326 } 4327 __scsi_init_queue(shost, q); 4328 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 4329 rport->rqst_q = q; 4330 return 0; 4331 } 4332 4333 4334 /** 4335 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports 4336 * @q: the request_queue that is to be torn down. 4337 * 4338 * Notes: 4339 * Before unregistering the queue empty any requests that are blocked 4340 * 4341 * 4342 */ 4343 static void fc_bsg_remove(struct request_queue * q)4344 fc_bsg_remove(struct request_queue *q) 4345 { 4346 bsg_remove_queue(q); 4347 } 4348 4349 4350 /* Original Author: Martin Hicks */ 4351 MODULE_AUTHOR("James Smart"); 4352 MODULE_DESCRIPTION("FC Transport Attributes"); 4353 MODULE_LICENSE("GPL"); 4354 4355 module_init(fc_transport_init); 4356 module_exit(fc_transport_exit); 4357