drivers/scsi/scsi_transport_fc.c

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