drivers/scsi/scsi_transport_fc.c

   1 /*
   2  *  FiberChannel transport specific attributes exported to sysfs.
   3  *
   4  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ========
  21  *
  22  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
  23  *    Rewrite for host, target, device, and remote port attributes,
  24  *    statistics, and service functions...
  25  *    Add vports, etc
  26  *
  27  */
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32 #include <linux/kernel.h>
  33 #include <scsi/scsi_device.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_transport.h>
  36 #include <scsi/scsi_transport_fc.h>
  37 #include <scsi/scsi_cmnd.h>
  38 #include <net/netlink.h>
  39 #include <scsi/scsi_netlink_fc.h>
  40 #include <scsi/scsi_bsg_fc.h>
  41 #include "scsi_priv.h"
  42
  43 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
  44 static void fc_vport_sched_delete(struct work_struct *work);
  45 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
  46         struct device *pdev, struct fc_vport_identifiers  *ids,
  47         struct fc_vport **vport);
  48 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
  49 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
  50 static void fc_bsg_remove(struct request_queue *);
  51 static void fc_bsg_goose_queue(struct fc_rport *);
  52
  53 /*
  54  * Module Parameters
  55  */
  56
  57 /*
  58  * dev_loss_tmo: the default number of seconds that the FC transport
  59  *   should insulate the loss of a remote port.
  60  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
  61  */
  62 static unsigned int fc_dev_loss_tmo = 60;               /* seconds */
  63
  64 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
  65 MODULE_PARM_DESC(dev_loss_tmo,
  66                  "Maximum number of seconds that the FC transport should"
  67                  " insulate the loss of a remote port. Once this value is"
  68                  " exceeded, the scsi target is removed. Value should be"
  69                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
  70                  " fast_io_fail_tmo is not set.");
  71
  72 /*
  73  * Redefine so that we can have same named attributes in the
  74  * sdev/starget/host objects.
  75  */
  76 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)                \
  77 struct device_attribute device_attr_##_prefix##_##_name =       \
  78         __ATTR(_name,_mode,_show,_store)
  79
  80 #define fc_enum_name_search(title, table_type, table)                   \
  81 static const char *get_fc_##title##_name(enum table_type table_key)     \
  82 {                                                                       \
  83         int i;                                                          \
  84         char *name = NULL;                                              \
  85                                                                         \
  86         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
  87                 if (table[i].value == table_key) {                      \
  88                         name = table[i].name;                           \
  89                         break;                                          \
  90                 }                                                       \
  91         }                                                               \
  92         return name;                                                    \
  93 }
  94
  95 #define fc_enum_name_match(title, table_type, table)                    \
  96 static int get_fc_##title##_match(const char *table_key,                \
  97                 enum table_type *value)                                 \
  98 {                                                                       \
  99         int i;                                                          \
 100                                                                         \
 101         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
 102                 if (strncmp(table_key, table[i].name,                   \
 103                                 table[i].matchlen) == 0) {              \
 104                         *value = table[i].value;                        \
 105                         return 0; /* success */                         \
 106                 }                                                       \
 107         }                                                               \
 108         return 1; /* failure */                                         \
 109 }
 110
 111
 112 /* Convert fc_port_type values to ascii string name */
 113 static struct {
 114         enum fc_port_type       value;
 115         char                    *name;
 116 } fc_port_type_names[] = {
 117         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
 118         { FC_PORTTYPE_OTHER,            "Other" },
 119         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
 120         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
 121         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
 122         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
 123         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection)" },
 124         { FC_PORTTYPE_NPIV,             "NPIV VPORT" },
 125 };
 126 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
 127 #define FC_PORTTYPE_MAX_NAMELEN         50
 128
 129 /* Reuse fc_port_type enum function for vport_type */
 130 #define get_fc_vport_type_name get_fc_port_type_name
 131
 132
 133 /* Convert fc_host_event_code values to ascii string name */
 134 static const struct {
 135         enum fc_host_event_code         value;
 136         char                            *name;
 137 } fc_host_event_code_names[] = {
 138         { FCH_EVT_LIP,                  "lip" },
 139         { FCH_EVT_LINKUP,               "link_up" },
 140         { FCH_EVT_LINKDOWN,             "link_down" },
 141         { FCH_EVT_LIPRESET,             "lip_reset" },
 142         { FCH_EVT_RSCN,                 "rscn" },
 143         { FCH_EVT_ADAPTER_CHANGE,       "adapter_chg" },
 144         { FCH_EVT_PORT_UNKNOWN,         "port_unknown" },
 145         { FCH_EVT_PORT_ONLINE,          "port_online" },
 146         { FCH_EVT_PORT_OFFLINE,         "port_offline" },
 147         { FCH_EVT_PORT_FABRIC,          "port_fabric" },
 148         { FCH_EVT_LINK_UNKNOWN,         "link_unknown" },
 149         { FCH_EVT_VENDOR_UNIQUE,        "vendor_unique" },
 150 };
 151 fc_enum_name_search(host_event_code, fc_host_event_code,
 152                 fc_host_event_code_names)
 153 #define FC_HOST_EVENT_CODE_MAX_NAMELEN  30
 154
 155
 156 /* Convert fc_port_state values to ascii string name */
 157 static struct {
 158         enum fc_port_state      value;
 159         char                    *name;
 160 } fc_port_state_names[] = {
 161         { FC_PORTSTATE_UNKNOWN,         "Unknown" },
 162         { FC_PORTSTATE_NOTPRESENT,      "Not Present" },
 163         { FC_PORTSTATE_ONLINE,          "Online" },
 164         { FC_PORTSTATE_OFFLINE,         "Offline" },
 165         { FC_PORTSTATE_BLOCKED,         "Blocked" },
 166         { FC_PORTSTATE_BYPASSED,        "Bypassed" },
 167         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics" },
 168         { FC_PORTSTATE_LINKDOWN,        "Linkdown" },
 169         { FC_PORTSTATE_ERROR,           "Error" },
 170         { FC_PORTSTATE_LOOPBACK,        "Loopback" },
 171         { FC_PORTSTATE_DELETED,         "Deleted" },
 172 };
 173 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
 174 #define FC_PORTSTATE_MAX_NAMELEN        20
 175
 176
 177 /* Convert fc_vport_state values to ascii string name */
 178 static struct {
 179         enum fc_vport_state     value;
 180         char                    *name;
 181 } fc_vport_state_names[] = {
 182         { FC_VPORT_UNKNOWN,             "Unknown" },
 183         { FC_VPORT_ACTIVE,              "Active" },
 184         { FC_VPORT_DISABLED,            "Disabled" },
 185         { FC_VPORT_LINKDOWN,            "Linkdown" },
 186         { FC_VPORT_INITIALIZING,        "Initializing" },
 187         { FC_VPORT_NO_FABRIC_SUPP,      "No Fabric Support" },
 188         { FC_VPORT_NO_FABRIC_RSCS,      "No Fabric Resources" },
 189         { FC_VPORT_FABRIC_LOGOUT,       "Fabric Logout" },
 190         { FC_VPORT_FABRIC_REJ_WWN,      "Fabric Rejected WWN" },
 191         { FC_VPORT_FAILED,              "VPort Failed" },
 192 };
 193 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
 194 #define FC_VPORTSTATE_MAX_NAMELEN       24
 195
 196 /* Reuse fc_vport_state enum function for vport_last_state */
 197 #define get_fc_vport_last_state_name get_fc_vport_state_name
 198
 199
 200 /* Convert fc_tgtid_binding_type values to ascii string name */
 201 static const struct {
 202         enum fc_tgtid_binding_type      value;
 203         char                            *name;
 204         int                             matchlen;
 205 } fc_tgtid_binding_type_names[] = {
 206         { FC_TGTID_BIND_NONE, "none", 4 },
 207         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
 208         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
 209         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
 210 };
 211 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
 212                 fc_tgtid_binding_type_names)
 213 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
 214                 fc_tgtid_binding_type_names)
 215 #define FC_BINDTYPE_MAX_NAMELEN 30
 216
 217
 218 #define fc_bitfield_name_search(title, table)                   \
 219 static ssize_t                                                  \
 220 get_fc_##title##_names(u32 table_key, char *buf)                \
 221 {                                                               \
 222         char *prefix = "";                                      \
 223         ssize_t len = 0;                                        \
 224         int i;                                                  \
 225                                                                 \
 226         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 227                 if (table[i].value & table_key) {               \
 228                         len += sprintf(buf + len, "%s%s",       \
 229                                 prefix, table[i].name);         \
 230                         prefix = ", ";                          \
 231                 }                                               \
 232         }                                                       \
 233         len += sprintf(buf + len, "\n");                        \
 234         return len;                                             \
 235 }
 236
 237
 238 /* Convert FC_COS bit values to ascii string name */
 239 static const struct {
 240         u32                     value;
 241         char                    *name;
 242 } fc_cos_names[] = {
 243         { FC_COS_CLASS1,        "Class 1" },
 244         { FC_COS_CLASS2,        "Class 2" },
 245         { FC_COS_CLASS3,        "Class 3" },
 246         { FC_COS_CLASS4,        "Class 4" },
 247         { FC_COS_CLASS6,        "Class 6" },
 248 };
 249 fc_bitfield_name_search(cos, fc_cos_names)
 250
 251
 252 /* Convert FC_PORTSPEED bit values to ascii string name */
 253 static const struct {
 254         u32                     value;
 255         char                    *name;
 256 } fc_port_speed_names[] = {
 257         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
 258         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
 259         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
 260         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
 261         { FC_PORTSPEED_8GBIT,           "8 Gbit" },
 262         { FC_PORTSPEED_16GBIT,          "16 Gbit" },
 263         { FC_PORTSPEED_32GBIT,          "32 Gbit" },
 264         { FC_PORTSPEED_20GBIT,          "20 Gbit" },
 265         { FC_PORTSPEED_40GBIT,          "40 Gbit" },
 266         { FC_PORTSPEED_50GBIT,          "50 Gbit" },
 267         { FC_PORTSPEED_100GBIT,         "100 Gbit" },
 268         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
 269 };
 270 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 271
 272
 273 static int
 274 show_fc_fc4s (char *buf, u8 *fc4_list)
 275 {
 276         int i, len=0;
 277
 278         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 279                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 280         len += sprintf(buf + len, "\n");
 281         return len;
 282 }
 283
 284
 285 /* Convert FC_PORT_ROLE bit values to ascii string name */
 286 static const struct {
 287         u32                     value;
 288         char                    *name;
 289 } fc_port_role_names[] = {
 290         { FC_PORT_ROLE_FCP_TARGET,      "FCP Target" },
 291         { FC_PORT_ROLE_FCP_INITIATOR,   "FCP Initiator" },
 292         { FC_PORT_ROLE_IP_PORT,         "IP Port" },
 293 };
 294 fc_bitfield_name_search(port_roles, fc_port_role_names)
 295
 296 /*
 297  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 298  */
 299 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 300 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 301 #define FC_FPORT_PORTID                 0x00000e
 302 #define FC_FABCTLR_PORTID               0x00000d
 303 #define FC_DIRSRVR_PORTID               0x00000c
 304 #define FC_TIMESRVR_PORTID              0x00000b
 305 #define FC_MGMTSRVR_PORTID              0x00000a
 306
 307
 308 static void fc_timeout_deleted_rport(struct work_struct *work);
 309 static void fc_timeout_fail_rport_io(struct work_struct *work);
 310 static void fc_scsi_scan_rport(struct work_struct *work);
 311
 312 /*
 313  * Attribute counts pre object type...
 314  * Increase these values if you add attributes
 315  */
 316 #define FC_STARGET_NUM_ATTRS    3
 317 #define FC_RPORT_NUM_ATTRS      10
 318 #define FC_VPORT_NUM_ATTRS      9
 319 #define FC_HOST_NUM_ATTRS       29
 320
 321 struct fc_internal {
 322         struct scsi_transport_template t;
 323         struct fc_function_template *f;
 324
 325         /*
 326          * For attributes : each object has :
 327          *   An array of the actual attributes structures
 328          *   An array of null-terminated pointers to the attribute
 329          *     structures - used for mid-layer interaction.
 330          *
 331          * The attribute containers for the starget and host are are
 332          * part of the midlayer. As the remote port is specific to the
 333          * fc transport, we must provide the attribute container.
 334          */
 335         struct device_attribute private_starget_attrs[
 336                                                         FC_STARGET_NUM_ATTRS];
 337         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 338
 339         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 340         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 341
 342         struct transport_container rport_attr_cont;
 343         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 344         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 345
 346         struct transport_container vport_attr_cont;
 347         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
 348         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
 349 };
 350
 351 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 352
 353 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 354                            struct device *cdev)
 355 {
 356         struct scsi_target *starget = to_scsi_target(dev);
 357         struct fc_rport *rport = starget_to_rport(starget);
 358
 359         /*
 360          * if parent is remote port, use values from remote port.
 361          * Otherwise, this host uses the fc_transport, but not the
 362          * remote port interface. As such, initialize to known non-values.
 363          */
 364         if (rport) {
 365                 fc_starget_node_name(starget) = rport->node_name;
 366                 fc_starget_port_name(starget) = rport->port_name;
 367                 fc_starget_port_id(starget) = rport->port_id;
 368         } else {
 369                 fc_starget_node_name(starget) = -1;
 370                 fc_starget_port_name(starget) = -1;
 371                 fc_starget_port_id(starget) = -1;
 372         }
 373
 374         return 0;
 375 }
 376
 377 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 378                                "fc_transport",
 379                                fc_target_setup,
 380                                NULL,
 381                                NULL);
 382
 383 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 384                          struct device *cdev)
 385 {
 386         struct Scsi_Host *shost = dev_to_shost(dev);
 387         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 388
 389         /*
 390          * Set default values easily detected by the midlayer as
 391          * failure cases.  The scsi lldd is responsible for initializing
 392          * all transport attributes to valid values per host.
 393          */
 394         fc_host->node_name = -1;
 395         fc_host->port_name = -1;
 396         fc_host->permanent_port_name = -1;
 397         fc_host->supported_classes = FC_COS_UNSPECIFIED;
 398         memset(fc_host->supported_fc4s, 0,
 399                 sizeof(fc_host->supported_fc4s));
 400         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
 401         fc_host->maxframe_size = -1;
 402         fc_host->max_npiv_vports = 0;
 403         memset(fc_host->serial_number, 0,
 404                 sizeof(fc_host->serial_number));
 405         memset(fc_host->manufacturer, 0,
 406                 sizeof(fc_host->manufacturer));
 407         memset(fc_host->model, 0,
 408                 sizeof(fc_host->model));
 409         memset(fc_host->model_description, 0,
 410                 sizeof(fc_host->model_description));
 411         memset(fc_host->hardware_version, 0,
 412                 sizeof(fc_host->hardware_version));
 413         memset(fc_host->driver_version, 0,
 414                 sizeof(fc_host->driver_version));
 415         memset(fc_host->firmware_version, 0,
 416                 sizeof(fc_host->firmware_version));
 417         memset(fc_host->optionrom_version, 0,
 418                 sizeof(fc_host->optionrom_version));
 419
 420         fc_host->port_id = -1;
 421         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
 422         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
 423         memset(fc_host->active_fc4s, 0,
 424                 sizeof(fc_host->active_fc4s));
 425         fc_host->speed = FC_PORTSPEED_UNKNOWN;
 426         fc_host->fabric_name = -1;
 427         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
 428         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
 429
 430         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
 431
 432         INIT_LIST_HEAD(&fc_host->rports);
 433         INIT_LIST_HEAD(&fc_host->rport_bindings);
 434         INIT_LIST_HEAD(&fc_host->vports);
 435         fc_host->next_rport_number = 0;
 436         fc_host->next_target_id = 0;
 437         fc_host->next_vport_number = 0;
 438         fc_host->npiv_vports_inuse = 0;
 439
 440         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
 441                  "fc_wq_%d", shost->host_no);
 442         fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
 443         if (!fc_host->work_q)
 444                 return -ENOMEM;
 445
 446         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
 447         snprintf(fc_host->devloss_work_q_name,
 448                  sizeof(fc_host->devloss_work_q_name),
 449                  "fc_dl_%d", shost->host_no);
 450         fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
 451                                         fc_host->devloss_work_q_name);
 452         if (!fc_host->devloss_work_q) {
 453                 destroy_workqueue(fc_host->work_q);
 454                 fc_host->work_q = NULL;
 455                 return -ENOMEM;
 456         }
 457
 458         fc_bsg_hostadd(shost, fc_host);
 459         /* ignore any bsg add error - we just can't do sgio */
 460
 461         return 0;
 462 }
 463
 464 static int fc_host_remove(struct transport_container *tc, struct device *dev,
 465                          struct device *cdev)
 466 {
 467         struct Scsi_Host *shost = dev_to_shost(dev);
 468         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 469
 470         fc_bsg_remove(fc_host->rqst_q);
 471         return 0;
 472 }
 473
 474 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 475                                "fc_host",
 476                                fc_host_setup,
 477                                fc_host_remove,
 478                                NULL);
 479
 480 /*
 481  * Setup and Remove actions for remote ports are handled
 482  * in the service functions below.
 483  */
 484 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 485                                "fc_remote_ports",
 486                                NULL,
 487                                NULL,
 488                                NULL);
 489
 490 /*
 491  * Setup and Remove actions for virtual ports are handled
 492  * in the service functions below.
 493  */
 494 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
 495                                "fc_vports",
 496                                NULL,
 497                                NULL,
 498                                NULL);
 499
 500 /*
 501  * Netlink Infrastructure
 502  */
 503
 504 static atomic_t fc_event_seq;
 505
 506 /**
 507  * fc_get_event_number - Obtain the next sequential FC event number
 508  *
 509  * Notes:
 510  *   We could have inlined this, but it would have required fc_event_seq to
 511  *   be exposed. For now, live with the subroutine call.
 512  *   Atomic used to avoid lock/unlock...
 513  */
 514 u32
 515 fc_get_event_number(void)
 516 {
 517         return atomic_add_return(1, &fc_event_seq);
 518 }
 519 EXPORT_SYMBOL(fc_get_event_number);
 520
 521
 522 /**
 523  * fc_host_post_event - called to post an even on an fc_host.
 524  * @shost:              host the event occurred on
 525  * @event_number:       fc event number obtained from get_fc_event_number()
 526  * @event_code:         fc_host event being posted
 527  * @event_data:         32bits of data for the event being posted
 528  *
 529  * Notes:
 530  *      This routine assumes no locks are held on entry.
 531  */
 532 void
 533 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 534                 enum fc_host_event_code event_code, u32 event_data)
 535 {
 536         struct sk_buff *skb;
 537         struct nlmsghdr *nlh;
 538         struct fc_nl_event *event;
 539         const char *name;
 540         u32 len;
 541         int err;
 542
 543         if (!scsi_nl_sock) {
 544                 err = -ENOENT;
 545                 goto send_fail;
 546         }
 547
 548         len = FC_NL_MSGALIGN(sizeof(*event));
 549
 550         skb = nlmsg_new(len, GFP_KERNEL);
 551         if (!skb) {
 552                 err = -ENOBUFS;
 553                 goto send_fail;
 554         }
 555
 556         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 557         if (!nlh) {
 558                 err = -ENOBUFS;
 559                 goto send_fail_skb;
 560         }
 561         event = nlmsg_data(nlh);
 562
 563         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 564                                 FC_NL_ASYNC_EVENT, len);
 565         event->seconds = get_seconds();
 566         event->vendor_id = 0;
 567         event->host_no = shost->host_no;
 568         event->event_datalen = sizeof(u32);     /* bytes */
 569         event->event_num = event_number;
 570         event->event_code = event_code;
 571         event->event_data = event_data;
 572
 573         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 574                         GFP_KERNEL);
 575         return;
 576
 577 send_fail_skb:
 578         kfree_skb(skb);
 579 send_fail:
 580         name = get_fc_host_event_code_name(event_code);
 581         printk(KERN_WARNING
 582                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
 583                 __func__, shost->host_no,
 584                 (name) ? name : "<unknown>", event_data, err);
 585         return;
 586 }
 587 EXPORT_SYMBOL(fc_host_post_event);
 588
 589
 590 /**
 591  * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
 592  * @shost:              host the event occurred on
 593  * @event_number:       fc event number obtained from get_fc_event_number()
 594  * @data_len:           amount, in bytes, of vendor unique data
 595  * @data_buf:           pointer to vendor unique data
 596  * @vendor_id:          Vendor id
 597  *
 598  * Notes:
 599  *      This routine assumes no locks are held on entry.
 600  */
 601 void
 602 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 603                 u32 data_len, char * data_buf, u64 vendor_id)
 604 {
 605         struct sk_buff *skb;
 606         struct nlmsghdr *nlh;
 607         struct fc_nl_event *event;
 608         u32 len;
 609         int err;
 610
 611         if (!scsi_nl_sock) {
 612                 err = -ENOENT;
 613                 goto send_vendor_fail;
 614         }
 615
 616         len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
 617
 618         skb = nlmsg_new(len, GFP_KERNEL);
 619         if (!skb) {
 620                 err = -ENOBUFS;
 621                 goto send_vendor_fail;
 622         }
 623
 624         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 625         if (!nlh) {
 626                 err = -ENOBUFS;
 627                 goto send_vendor_fail_skb;
 628         }
 629         event = nlmsg_data(nlh);
 630
 631         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 632                                 FC_NL_ASYNC_EVENT, len);
 633         event->seconds = get_seconds();
 634         event->vendor_id = vendor_id;
 635         event->host_no = shost->host_no;
 636         event->event_datalen = data_len;        /* bytes */
 637         event->event_num = event_number;
 638         event->event_code = FCH_EVT_VENDOR_UNIQUE;
 639         memcpy(&event->event_data, data_buf, data_len);
 640
 641         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 642                         GFP_KERNEL);
 643         return;
 644
 645 send_vendor_fail_skb:
 646         kfree_skb(skb);
 647 send_vendor_fail:
 648         printk(KERN_WARNING
 649                 "%s: Dropped Event : host %d vendor_unique - err %d\n",
 650                 __func__, shost->host_no, err);
 651         return;
 652 }
 653 EXPORT_SYMBOL(fc_host_post_vendor_event);
 654
 655
 656
 657 static __init int fc_transport_init(void)
 658 {
 659         int error;
 660
 661         atomic_set(&fc_event_seq, 0);
 662
 663         error = transport_class_register(&fc_host_class);
 664         if (error)
 665                 return error;
 666         error = transport_class_register(&fc_vport_class);
 667         if (error)
 668                 goto unreg_host_class;
 669         error = transport_class_register(&fc_rport_class);
 670         if (error)
 671                 goto unreg_vport_class;
 672         error = transport_class_register(&fc_transport_class);
 673         if (error)
 674                 goto unreg_rport_class;
 675         return 0;
 676
 677 unreg_rport_class:
 678         transport_class_unregister(&fc_rport_class);
 679 unreg_vport_class:
 680         transport_class_unregister(&fc_vport_class);
 681 unreg_host_class:
 682         transport_class_unregister(&fc_host_class);
 683         return error;
 684 }
 685
 686 static void __exit fc_transport_exit(void)
 687 {
 688         transport_class_unregister(&fc_transport_class);
 689         transport_class_unregister(&fc_rport_class);
 690         transport_class_unregister(&fc_host_class);
 691         transport_class_unregister(&fc_vport_class);
 692 }
 693
 694 /*
 695  * FC Remote Port Attribute Management
 696  */
 697
 698 #define fc_rport_show_function(field, format_string, sz, cast)          \
 699 static ssize_t                                                          \
 700 show_fc_rport_##field (struct device *dev,                              \
 701                        struct device_attribute *attr, char *buf)        \
 702 {                                                                       \
 703         struct fc_rport *rport = transport_class_to_rport(dev);         \
 704         struct Scsi_Host *shost = rport_to_shost(rport);                \
 705         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 706         if ((i->f->get_rport_##field) &&                                \
 707             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 708               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 709               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 710                 i->f->get_rport_##field(rport);                         \
 711         return snprintf(buf, sz, format_string, cast rport->field);     \
 712 }
 713
 714 #define fc_rport_store_function(field)                                  \
 715 static ssize_t                                                          \
 716 store_fc_rport_##field(struct device *dev,                              \
 717                        struct device_attribute *attr,                   \
 718                        const char *buf, size_t count)                   \
 719 {                                                                       \
 720         int val;                                                        \
 721         struct fc_rport *rport = transport_class_to_rport(dev);         \
 722         struct Scsi_Host *shost = rport_to_shost(rport);                \
 723         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 724         char *cp;                                                       \
 725         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
 726             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
 727             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
 728                 return -EBUSY;                                          \
 729         val = simple_strtoul(buf, &cp, 0);                              \
 730         if (*cp && (*cp != '\n'))                                       \
 731                 return -EINVAL;                                         \
 732         i->f->set_rport_##field(rport, val);                            \
 733         return count;                                                   \
 734 }
 735
 736 #define fc_rport_rd_attr(field, format_string, sz)                      \
 737         fc_rport_show_function(field, format_string, sz, )              \
 738 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 739                          show_fc_rport_##field, NULL)
 740
 741 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
 742         fc_rport_show_function(field, format_string, sz, (cast))        \
 743 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 744                           show_fc_rport_##field, NULL)
 745
 746 #define fc_rport_rw_attr(field, format_string, sz)                      \
 747         fc_rport_show_function(field, format_string, sz, )              \
 748         fc_rport_store_function(field)                                  \
 749 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
 750                         show_fc_rport_##field,                          \
 751                         store_fc_rport_##field)
 752
 753
 754 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
 755 static ssize_t                                                          \
 756 show_fc_rport_##field (struct device *dev,                              \
 757                        struct device_attribute *attr, char *buf)        \
 758 {                                                                       \
 759         struct fc_rport *rport = transport_class_to_rport(dev);         \
 760         return snprintf(buf, sz, format_string, cast rport->field);     \
 761 }
 762
 763 #define fc_private_rport_rd_attr(field, format_string, sz)              \
 764         fc_private_rport_show_function(field, format_string, sz, )      \
 765 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 766                          show_fc_rport_##field, NULL)
 767
 768 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
 769         fc_private_rport_show_function(field, format_string, sz, (cast)) \
 770 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 771                           show_fc_rport_##field, NULL)
 772
 773
 774 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
 775 static ssize_t                                                          \
 776 show_fc_rport_##title (struct device *dev,                              \
 777                        struct device_attribute *attr, char *buf)        \
 778 {                                                                       \
 779         struct fc_rport *rport = transport_class_to_rport(dev);         \
 780         const char *name;                                               \
 781         name = get_fc_##title##_name(rport->title);                     \
 782         if (!name)                                                      \
 783                 return -EINVAL;                                         \
 784         return snprintf(buf, maxlen, "%s\n", name);                     \
 785 }                                                                       \
 786 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
 787                         show_fc_rport_##title, NULL)
 788
 789
 790 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
 791         i->private_rport_attrs[count] = device_attr_rport_##field; \
 792         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 793         i->private_rport_attrs[count].store = NULL;                     \
 794         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 795         if (i->f->show_rport_##field)                                   \
 796                 count++
 797
 798 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
 799         i->private_rport_attrs[count] = device_attr_rport_##field; \
 800         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 801         i->private_rport_attrs[count].store = NULL;                     \
 802         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 803         count++
 804
 805 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
 806         i->private_rport_attrs[count] = device_attr_rport_##field; \
 807         if (!i->f->set_rport_##field) {                                 \
 808                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
 809                 i->private_rport_attrs[count].store = NULL;             \
 810         }                                                               \
 811         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 812         if (i->f->show_rport_##field)                                   \
 813                 count++
 814
 815 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
 816 {                                                                       \
 817         i->private_rport_attrs[count] = device_attr_rport_##field; \
 818         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 819         count++;                                                        \
 820 }
 821
 822
 823 /* The FC Transport Remote Port Attributes: */
 824
 825 /* Fixed Remote Port Attributes */
 826
 827 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
 828
 829 static ssize_t
 830 show_fc_rport_supported_classes (struct device *dev,
 831                                  struct device_attribute *attr, char *buf)
 832 {
 833         struct fc_rport *rport = transport_class_to_rport(dev);
 834         if (rport->supported_classes == FC_COS_UNSPECIFIED)
 835                 return snprintf(buf, 20, "unspecified\n");
 836         return get_fc_cos_names(rport->supported_classes, buf);
 837 }
 838 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
 839                 show_fc_rport_supported_classes, NULL);
 840
 841 /* Dynamic Remote Port Attributes */
 842
 843 /*
 844  * dev_loss_tmo attribute
 845  */
 846 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
 847 {
 848         char *cp;
 849
 850         *val = simple_strtoul(buf, &cp, 0);
 851         if ((*cp && (*cp != '\n')) || (*val < 0))
 852                 return -EINVAL;
 853         /*
 854          * Check for overflow; dev_loss_tmo is u32
 855          */
 856         if (*val > UINT_MAX)
 857                 return -EINVAL;
 858
 859         return 0;
 860 }
 861
 862 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
 863                                      unsigned long val)
 864 {
 865         struct Scsi_Host *shost = rport_to_shost(rport);
 866         struct fc_internal *i = to_fc_internal(shost->transportt);
 867
 868         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 869             (rport->port_state == FC_PORTSTATE_DELETED) ||
 870             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 871                 return -EBUSY;
 872         /*
 873          * Check for overflow; dev_loss_tmo is u32
 874          */
 875         if (val > UINT_MAX)
 876                 return -EINVAL;
 877
 878         /*
 879          * If fast_io_fail is off we have to cap
 880          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
 881          */
 882         if (rport->fast_io_fail_tmo == -1 &&
 883             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
 884                 return -EINVAL;
 885
 886         i->f->set_rport_dev_loss_tmo(rport, val);
 887         return 0;
 888 }
 889
 890 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
 891 static ssize_t
 892 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 893                             const char *buf, size_t count)
 894 {
 895         struct fc_rport *rport = transport_class_to_rport(dev);
 896         unsigned long val;
 897         int rc;
 898
 899         rc = fc_str_to_dev_loss(buf, &val);
 900         if (rc)
 901                 return rc;
 902
 903         rc = fc_rport_set_dev_loss_tmo(rport, val);
 904         if (rc)
 905                 return rc;
 906         return count;
 907 }
 908 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
 909                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
 910
 911
 912 /* Private Remote Port Attributes */
 913
 914 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 915 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 916 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
 917
 918 static ssize_t
 919 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
 920                      char *buf)
 921 {
 922         struct fc_rport *rport = transport_class_to_rport(dev);
 923
 924         /* identify any roles that are port_id specific */
 925         if ((rport->port_id != -1) &&
 926             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
 927                                         FC_WELLKNOWN_PORTID_MASK) {
 928                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
 929                 case FC_FPORT_PORTID:
 930                         return snprintf(buf, 30, "Fabric Port\n");
 931                 case FC_FABCTLR_PORTID:
 932                         return snprintf(buf, 30, "Fabric Controller\n");
 933                 case FC_DIRSRVR_PORTID:
 934                         return snprintf(buf, 30, "Directory Server\n");
 935                 case FC_TIMESRVR_PORTID:
 936                         return snprintf(buf, 30, "Time Server\n");
 937                 case FC_MGMTSRVR_PORTID:
 938                         return snprintf(buf, 30, "Management Server\n");
 939                 default:
 940                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
 941                 }
 942         } else {
 943                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
 944                         return snprintf(buf, 20, "unknown\n");
 945                 return get_fc_port_roles_names(rport->roles, buf);
 946         }
 947 }
 948 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
 949                 show_fc_rport_roles, NULL);
 950
 951 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 952 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
 953
 954 /*
 955  * fast_io_fail_tmo attribute
 956  */
 957 static ssize_t
 958 show_fc_rport_fast_io_fail_tmo (struct device *dev,
 959                                 struct device_attribute *attr, char *buf)
 960 {
 961         struct fc_rport *rport = transport_class_to_rport(dev);
 962
 963         if (rport->fast_io_fail_tmo == -1)
 964                 return snprintf(buf, 5, "off\n");
 965         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
 966 }
 967
 968 static ssize_t
 969 store_fc_rport_fast_io_fail_tmo(struct device *dev,
 970                                 struct device_attribute *attr, const char *buf,
 971                                 size_t count)
 972 {
 973         int val;
 974         char *cp;
 975         struct fc_rport *rport = transport_class_to_rport(dev);
 976
 977         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 978             (rport->port_state == FC_PORTSTATE_DELETED) ||
 979             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 980                 return -EBUSY;
 981         if (strncmp(buf, "off", 3) == 0)
 982                 rport->fast_io_fail_tmo = -1;
 983         else {
 984                 val = simple_strtoul(buf, &cp, 0);
 985                 if ((*cp && (*cp != '\n')) || (val < 0))
 986                         return -EINVAL;
 987                 /*
 988                  * Cap fast_io_fail by dev_loss_tmo or
 989                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 990                  */
 991                 if ((val >= rport->dev_loss_tmo) ||
 992                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
 993                         return -EINVAL;
 994
 995                 rport->fast_io_fail_tmo = val;
 996         }
 997         return count;
 998 }
 999 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1000         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1001
1002
1003 /*
1004  * FC SCSI Target Attribute Management
1005  */
1006
1007 /*
1008  * Note: in the target show function we recognize when the remote
1009  *  port is in the hierarchy and do not allow the driver to get
1010  *  involved in sysfs functions. The driver only gets involved if
1011  *  it's the "old" style that doesn't use rports.
1012  */
1013 #define fc_starget_show_function(field, format_string, sz, cast)        \
1014 static ssize_t                                                          \
1015 show_fc_starget_##field (struct device *dev,                            \
1016                          struct device_attribute *attr, char *buf)      \
1017 {                                                                       \
1018         struct scsi_target *starget = transport_class_to_starget(dev);  \
1019         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1020         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1021         struct fc_rport *rport = starget_to_rport(starget);             \
1022         if (rport)                                                      \
1023                 fc_starget_##field(starget) = rport->field;             \
1024         else if (i->f->get_starget_##field)                             \
1025                 i->f->get_starget_##field(starget);                     \
1026         return snprintf(buf, sz, format_string,                         \
1027                 cast fc_starget_##field(starget));                      \
1028 }
1029
1030 #define fc_starget_rd_attr(field, format_string, sz)                    \
1031         fc_starget_show_function(field, format_string, sz, )            \
1032 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1033                          show_fc_starget_##field, NULL)
1034
1035 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1036         fc_starget_show_function(field, format_string, sz, (cast))      \
1037 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1038                           show_fc_starget_##field, NULL)
1039
1040 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1041         i->private_starget_attrs[count] = device_attr_starget_##field; \
1042         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1043         i->private_starget_attrs[count].store = NULL;                   \
1044         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1045         if (i->f->show_starget_##field)                                 \
1046                 count++
1047
1048 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1049         i->private_starget_attrs[count] = device_attr_starget_##field; \
1050         if (!i->f->set_starget_##field) {                               \
1051                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1052                 i->private_starget_attrs[count].store = NULL;           \
1053         }                                                               \
1054         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1055         if (i->f->show_starget_##field)                                 \
1056                 count++
1057
1058 /* The FC Transport SCSI Target Attributes: */
1059 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1060 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1061 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1062
1063
1064 /*
1065  * FC Virtual Port Attribute Management
1066  */
1067
1068 #define fc_vport_show_function(field, format_string, sz, cast)          \
1069 static ssize_t                                                          \
1070 show_fc_vport_##field (struct device *dev,                              \
1071                        struct device_attribute *attr, char *buf)        \
1072 {                                                                       \
1073         struct fc_vport *vport = transport_class_to_vport(dev);         \
1074         struct Scsi_Host *shost = vport_to_shost(vport);                \
1075         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1076         if ((i->f->get_vport_##field) &&                                \
1077             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1078                 i->f->get_vport_##field(vport);                         \
1079         return snprintf(buf, sz, format_string, cast vport->field);     \
1080 }
1081
1082 #define fc_vport_store_function(field)                                  \
1083 static ssize_t                                                          \
1084 store_fc_vport_##field(struct device *dev,                              \
1085                        struct device_attribute *attr,                   \
1086                        const char *buf, size_t count)                   \
1087 {                                                                       \
1088         int val;                                                        \
1089         struct fc_vport *vport = transport_class_to_vport(dev);         \
1090         struct Scsi_Host *shost = vport_to_shost(vport);                \
1091         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1092         char *cp;                                                       \
1093         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1094                 return -EBUSY;                                          \
1095         val = simple_strtoul(buf, &cp, 0);                              \
1096         if (*cp && (*cp != '\n'))                                       \
1097                 return -EINVAL;                                         \
1098         i->f->set_vport_##field(vport, val);                            \
1099         return count;                                                   \
1100 }
1101
1102 #define fc_vport_store_str_function(field, slen)                        \
1103 static ssize_t                                                          \
1104 store_fc_vport_##field(struct device *dev,                              \
1105                        struct device_attribute *attr,                   \
1106                        const char *buf, size_t count)                   \
1107 {                                                                       \
1108         struct fc_vport *vport = transport_class_to_vport(dev);         \
1109         struct Scsi_Host *shost = vport_to_shost(vport);                \
1110         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1111         unsigned int cnt=count;                                         \
1112                                                                         \
1113         /* count may include a LF at end of string */                   \
1114         if (buf[cnt-1] == '\n')                                         \
1115                 cnt--;                                                  \
1116         if (cnt > ((slen) - 1))                                         \
1117                 return -EINVAL;                                         \
1118         memcpy(vport->field, buf, cnt);                                 \
1119         i->f->set_vport_##field(vport);                                 \
1120         return count;                                                   \
1121 }
1122
1123 #define fc_vport_rd_attr(field, format_string, sz)                      \
1124         fc_vport_show_function(field, format_string, sz, )              \
1125 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1126                          show_fc_vport_##field, NULL)
1127
1128 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1129         fc_vport_show_function(field, format_string, sz, (cast))        \
1130 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1131                           show_fc_vport_##field, NULL)
1132
1133 #define fc_vport_rw_attr(field, format_string, sz)                      \
1134         fc_vport_show_function(field, format_string, sz, )              \
1135         fc_vport_store_function(field)                                  \
1136 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1137                         show_fc_vport_##field,                          \
1138                         store_fc_vport_##field)
1139
1140 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1141 static ssize_t                                                          \
1142 show_fc_vport_##field (struct device *dev,                              \
1143                        struct device_attribute *attr, char *buf)        \
1144 {                                                                       \
1145         struct fc_vport *vport = transport_class_to_vport(dev);         \
1146         return snprintf(buf, sz, format_string, cast vport->field);     \
1147 }
1148
1149 #define fc_private_vport_store_u32_function(field)                      \
1150 static ssize_t                                                          \
1151 store_fc_vport_##field(struct device *dev,                              \
1152                        struct device_attribute *attr,                   \
1153                        const char *buf, size_t count)                   \
1154 {                                                                       \
1155         u32 val;                                                        \
1156         struct fc_vport *vport = transport_class_to_vport(dev);         \
1157         char *cp;                                                       \
1158         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1159                 return -EBUSY;                                          \
1160         val = simple_strtoul(buf, &cp, 0);                              \
1161         if (*cp && (*cp != '\n'))                                       \
1162                 return -EINVAL;                                         \
1163         vport->field = val;                                             \
1164         return count;                                                   \
1165 }
1166
1167
1168 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1169         fc_private_vport_show_function(field, format_string, sz, )      \
1170 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1171                          show_fc_vport_##field, NULL)
1172
1173 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1174         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1175 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1176                           show_fc_vport_##field, NULL)
1177
1178 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1179         fc_private_vport_show_function(field, format_string, sz, )      \
1180         fc_private_vport_store_u32_function(field)                      \
1181 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1182                         show_fc_vport_##field,                          \
1183                         store_fc_vport_##field)
1184
1185
1186 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1187 static ssize_t                                                          \
1188 show_fc_vport_##title (struct device *dev,                              \
1189                        struct device_attribute *attr,                   \
1190                        char *buf)                                       \
1191 {                                                                       \
1192         struct fc_vport *vport = transport_class_to_vport(dev);         \
1193         const char *name;                                               \
1194         name = get_fc_##title##_name(vport->title);                     \
1195         if (!name)                                                      \
1196                 return -EINVAL;                                         \
1197         return snprintf(buf, maxlen, "%s\n", name);                     \
1198 }                                                                       \
1199 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1200                         show_fc_vport_##title, NULL)
1201
1202
1203 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1204         i->private_vport_attrs[count] = device_attr_vport_##field; \
1205         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1206         i->private_vport_attrs[count].store = NULL;                     \
1207         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1208         if (i->f->get_##field)                                          \
1209                 count++
1210         /* NOTE: Above MACRO differs: checks function not show bit */
1211
1212 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1213         i->private_vport_attrs[count] = device_attr_vport_##field; \
1214         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1215         i->private_vport_attrs[count].store = NULL;                     \
1216         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1217         count++
1218
1219 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1220         i->private_vport_attrs[count] = device_attr_vport_##field; \
1221         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1222         if (i->f->field)                                                \
1223                 count++
1224         /* NOTE: Above MACRO differs: checks function */
1225
1226 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1227         i->private_vport_attrs[count] = device_attr_vport_##field; \
1228         if (!i->f->set_vport_##field) {                                 \
1229                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1230                 i->private_vport_attrs[count].store = NULL;             \
1231         }                                                               \
1232         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1233         count++
1234         /* NOTE: Above MACRO differs: does not check show bit */
1235
1236 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1237 {                                                                       \
1238         i->private_vport_attrs[count] = device_attr_vport_##field; \
1239         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1240         count++;                                                        \
1241 }
1242
1243
1244 /* The FC Transport Virtual Port Attributes: */
1245
1246 /* Fixed Virtual Port Attributes */
1247
1248 /* Dynamic Virtual Port Attributes */
1249
1250 /* Private Virtual Port Attributes */
1251
1252 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1253 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1254 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1255 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1256
1257 static ssize_t
1258 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1259                      char *buf)
1260 {
1261         struct fc_vport *vport = transport_class_to_vport(dev);
1262
1263         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1264                 return snprintf(buf, 20, "unknown\n");
1265         return get_fc_port_roles_names(vport->roles, buf);
1266 }
1267 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1268
1269 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1270
1271 fc_private_vport_show_function(symbolic_name, "%s\n",
1272                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1273 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1274 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1275                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1276
1277 static ssize_t
1278 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1279                       const char *buf, size_t count)
1280 {
1281         struct fc_vport *vport = transport_class_to_vport(dev);
1282         struct Scsi_Host *shost = vport_to_shost(vport);
1283         unsigned long flags;
1284
1285         spin_lock_irqsave(shost->host_lock, flags);
1286         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1287                 spin_unlock_irqrestore(shost->host_lock, flags);
1288                 return -EBUSY;
1289         }
1290         vport->flags |= FC_VPORT_DELETING;
1291         spin_unlock_irqrestore(shost->host_lock, flags);
1292
1293         fc_queue_work(shost, &vport->vport_delete_work);
1294         return count;
1295 }
1296 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1297                         NULL, store_fc_vport_delete);
1298
1299
1300 /*
1301  * Enable/Disable vport
1302  *  Write "1" to disable, write "0" to enable
1303  */
1304 static ssize_t
1305 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1306                        const char *buf,
1307                            size_t count)
1308 {
1309         struct fc_vport *vport = transport_class_to_vport(dev);
1310         struct Scsi_Host *shost = vport_to_shost(vport);
1311         struct fc_internal *i = to_fc_internal(shost->transportt);
1312         int stat;
1313
1314         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1315                 return -EBUSY;
1316
1317         if (*buf == '0') {
1318                 if (vport->vport_state != FC_VPORT_DISABLED)
1319                         return -EALREADY;
1320         } else if (*buf == '1') {
1321                 if (vport->vport_state == FC_VPORT_DISABLED)
1322                         return -EALREADY;
1323         } else
1324                 return -EINVAL;
1325
1326         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1327         return stat ? stat : count;
1328 }
1329 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1330                         NULL, store_fc_vport_disable);
1331
1332
1333 /*
1334  * Host Attribute Management
1335  */
1336
1337 #define fc_host_show_function(field, format_string, sz, cast)           \
1338 static ssize_t                                                          \
1339 show_fc_host_##field (struct device *dev,                               \
1340                       struct device_attribute *attr, char *buf)         \
1341 {                                                                       \
1342         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1343         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1344         if (i->f->get_host_##field)                                     \
1345                 i->f->get_host_##field(shost);                          \
1346         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1347 }
1348
1349 #define fc_host_store_function(field)                                   \
1350 static ssize_t                                                          \
1351 store_fc_host_##field(struct device *dev,                               \
1352                       struct device_attribute *attr,                    \
1353                       const char *buf,  size_t count)                   \
1354 {                                                                       \
1355         int val;                                                        \
1356         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1357         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1358         char *cp;                                                       \
1359                                                                         \
1360         val = simple_strtoul(buf, &cp, 0);                              \
1361         if (*cp && (*cp != '\n'))                                       \
1362                 return -EINVAL;                                         \
1363         i->f->set_host_##field(shost, val);                             \
1364         return count;                                                   \
1365 }
1366
1367 #define fc_host_store_str_function(field, slen)                         \
1368 static ssize_t                                                          \
1369 store_fc_host_##field(struct device *dev,                               \
1370                       struct device_attribute *attr,                    \
1371                       const char *buf, size_t count)                    \
1372 {                                                                       \
1373         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1374         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1375         unsigned int cnt=count;                                         \
1376                                                                         \
1377         /* count may include a LF at end of string */                   \
1378         if (buf[cnt-1] == '\n')                                         \
1379                 cnt--;                                                  \
1380         if (cnt > ((slen) - 1))                                         \
1381                 return -EINVAL;                                         \
1382         memcpy(fc_host_##field(shost), buf, cnt);                       \
1383         i->f->set_host_##field(shost);                                  \
1384         return count;                                                   \
1385 }
1386
1387 #define fc_host_rd_attr(field, format_string, sz)                       \
1388         fc_host_show_function(field, format_string, sz, )               \
1389 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1390                          show_fc_host_##field, NULL)
1391
1392 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1393         fc_host_show_function(field, format_string, sz, (cast))         \
1394 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1395                           show_fc_host_##field, NULL)
1396
1397 #define fc_host_rw_attr(field, format_string, sz)                       \
1398         fc_host_show_function(field, format_string, sz, )               \
1399         fc_host_store_function(field)                                   \
1400 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1401                         show_fc_host_##field,                           \
1402                         store_fc_host_##field)
1403
1404 #define fc_host_rd_enum_attr(title, maxlen)                             \
1405 static ssize_t                                                          \
1406 show_fc_host_##title (struct device *dev,                               \
1407                       struct device_attribute *attr, char *buf)         \
1408 {                                                                       \
1409         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1410         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1411         const char *name;                                               \
1412         if (i->f->get_host_##title)                                     \
1413                 i->f->get_host_##title(shost);                          \
1414         name = get_fc_##title##_name(fc_host_##title(shost));           \
1415         if (!name)                                                      \
1416                 return -EINVAL;                                         \
1417         return snprintf(buf, maxlen, "%s\n", name);                     \
1418 }                                                                       \
1419 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1420
1421 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1422         i->private_host_attrs[count] = device_attr_host_##field;        \
1423         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1424         i->private_host_attrs[count].store = NULL;                      \
1425         i->host_attrs[count] = &i->private_host_attrs[count];           \
1426         if (i->f->show_host_##field)                                    \
1427                 count++
1428
1429 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1430         i->private_host_attrs[count] = device_attr_host_##field;        \
1431         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1432         i->private_host_attrs[count].store = NULL;                      \
1433         i->host_attrs[count] = &i->private_host_attrs[count];           \
1434         count++
1435
1436 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1437         i->private_host_attrs[count] = device_attr_host_##field;        \
1438         if (!i->f->set_host_##field) {                                  \
1439                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1440                 i->private_host_attrs[count].store = NULL;              \
1441         }                                                               \
1442         i->host_attrs[count] = &i->private_host_attrs[count];           \
1443         if (i->f->show_host_##field)                                    \
1444                 count++
1445
1446
1447 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1448 static ssize_t                                                          \
1449 show_fc_host_##field (struct device *dev,                               \
1450                       struct device_attribute *attr, char *buf)         \
1451 {                                                                       \
1452         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1453         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1454 }
1455
1456 #define fc_private_host_rd_attr(field, format_string, sz)               \
1457         fc_private_host_show_function(field, format_string, sz, )       \
1458 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1459                          show_fc_host_##field, NULL)
1460
1461 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1462         fc_private_host_show_function(field, format_string, sz, (cast)) \
1463 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1464                           show_fc_host_##field, NULL)
1465
1466 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1467         i->private_host_attrs[count] = device_attr_host_##field;        \
1468         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1469         i->private_host_attrs[count].store = NULL;                      \
1470         i->host_attrs[count] = &i->private_host_attrs[count];           \
1471         count++
1472
1473 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1474 {                                                                       \
1475         i->private_host_attrs[count] = device_attr_host_##field;        \
1476         i->host_attrs[count] = &i->private_host_attrs[count];           \
1477         count++;                                                        \
1478 }
1479
1480
1481 /* Fixed Host Attributes */
1482
1483 static ssize_t
1484 show_fc_host_supported_classes (struct device *dev,
1485                                 struct device_attribute *attr, char *buf)
1486 {
1487         struct Scsi_Host *shost = transport_class_to_shost(dev);
1488
1489         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1490                 return snprintf(buf, 20, "unspecified\n");
1491
1492         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1493 }
1494 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1495                 show_fc_host_supported_classes, NULL);
1496
1497 static ssize_t
1498 show_fc_host_supported_fc4s (struct device *dev,
1499                              struct device_attribute *attr, char *buf)
1500 {
1501         struct Scsi_Host *shost = transport_class_to_shost(dev);
1502         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1503 }
1504 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1505                 show_fc_host_supported_fc4s, NULL);
1506
1507 static ssize_t
1508 show_fc_host_supported_speeds (struct device *dev,
1509                                struct device_attribute *attr, char *buf)
1510 {
1511         struct Scsi_Host *shost = transport_class_to_shost(dev);
1512
1513         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1514                 return snprintf(buf, 20, "unknown\n");
1515
1516         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1517 }
1518 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1519                 show_fc_host_supported_speeds, NULL);
1520
1521
1522 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1523 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1524 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1525                              unsigned long long);
1526 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1527 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1528 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1529 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1530 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1531 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1532 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1533 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1534 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1535 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536
1537
1538 /* Dynamic Host Attributes */
1539
1540 static ssize_t
1541 show_fc_host_active_fc4s (struct device *dev,
1542                           struct device_attribute *attr, char *buf)
1543 {
1544         struct Scsi_Host *shost = transport_class_to_shost(dev);
1545         struct fc_internal *i = to_fc_internal(shost->transportt);
1546
1547         if (i->f->get_host_active_fc4s)
1548                 i->f->get_host_active_fc4s(shost);
1549
1550         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1551 }
1552 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1553                 show_fc_host_active_fc4s, NULL);
1554
1555 static ssize_t
1556 show_fc_host_speed (struct device *dev,
1557                     struct device_attribute *attr, char *buf)
1558 {
1559         struct Scsi_Host *shost = transport_class_to_shost(dev);
1560         struct fc_internal *i = to_fc_internal(shost->transportt);
1561
1562         if (i->f->get_host_speed)
1563                 i->f->get_host_speed(shost);
1564
1565         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1566                 return snprintf(buf, 20, "unknown\n");
1567
1568         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1569 }
1570 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1571                 show_fc_host_speed, NULL);
1572
1573
1574 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1575 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1576 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1577 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1578 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1579
1580 fc_private_host_show_function(system_hostname, "%s\n",
1581                 FC_SYMBOLIC_NAME_SIZE + 1, )
1582 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1583 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1584                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1585
1586
1587 /* Private Host Attributes */
1588
1589 static ssize_t
1590 show_fc_private_host_tgtid_bind_type(struct device *dev,
1591                                      struct device_attribute *attr, char *buf)
1592 {
1593         struct Scsi_Host *shost = transport_class_to_shost(dev);
1594         const char *name;
1595
1596         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1597         if (!name)
1598                 return -EINVAL;
1599         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1600 }
1601
1602 #define get_list_head_entry(pos, head, member)          \
1603         pos = list_entry((head)->next, typeof(*pos), member)
1604
1605 static ssize_t
1606 store_fc_private_host_tgtid_bind_type(struct device *dev,
1607         struct device_attribute *attr, const char *buf, size_t count)
1608 {
1609         struct Scsi_Host *shost = transport_class_to_shost(dev);
1610         struct fc_rport *rport;
1611         enum fc_tgtid_binding_type val;
1612         unsigned long flags;
1613
1614         if (get_fc_tgtid_bind_type_match(buf, &val))
1615                 return -EINVAL;
1616
1617         /* if changing bind type, purge all unused consistent bindings */
1618         if (val != fc_host_tgtid_bind_type(shost)) {
1619                 spin_lock_irqsave(shost->host_lock, flags);
1620                 while (!list_empty(&fc_host_rport_bindings(shost))) {
1621                         get_list_head_entry(rport,
1622                                 &fc_host_rport_bindings(shost), peers);
1623                         list_del(&rport->peers);
1624                         rport->port_state = FC_PORTSTATE_DELETED;
1625                         fc_queue_work(shost, &rport->rport_delete_work);
1626                 }
1627                 spin_unlock_irqrestore(shost->host_lock, flags);
1628         }
1629
1630         fc_host_tgtid_bind_type(shost) = val;
1631         return count;
1632 }
1633
1634 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1635                         show_fc_private_host_tgtid_bind_type,
1636                         store_fc_private_host_tgtid_bind_type);
1637
1638 static ssize_t
1639 store_fc_private_host_issue_lip(struct device *dev,
1640         struct device_attribute *attr, const char *buf, size_t count)
1641 {
1642         struct Scsi_Host *shost = transport_class_to_shost(dev);
1643         struct fc_internal *i = to_fc_internal(shost->transportt);
1644         int ret;
1645
1646         /* ignore any data value written to the attribute */
1647         if (i->f->issue_fc_host_lip) {
1648                 ret = i->f->issue_fc_host_lip(shost);
1649                 return ret ? ret: count;
1650         }
1651
1652         return -ENOENT;
1653 }
1654
1655 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1656                         store_fc_private_host_issue_lip);
1657
1658 static ssize_t
1659 store_fc_private_host_dev_loss_tmo(struct device *dev,
1660                                    struct device_attribute *attr,
1661                                    const char *buf, size_t count)
1662 {
1663         struct Scsi_Host *shost = transport_class_to_shost(dev);
1664         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1665         struct fc_rport *rport;
1666         unsigned long val, flags;
1667         int rc;
1668
1669         rc = fc_str_to_dev_loss(buf, &val);
1670         if (rc)
1671                 return rc;
1672
1673         fc_host_dev_loss_tmo(shost) = val;
1674         spin_lock_irqsave(shost->host_lock, flags);
1675         list_for_each_entry(rport, &fc_host->rports, peers)
1676                 fc_rport_set_dev_loss_tmo(rport, val);
1677         spin_unlock_irqrestore(shost->host_lock, flags);
1678         return count;
1679 }
1680
1681 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1682 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1683                       show_fc_host_dev_loss_tmo,
1684                       store_fc_private_host_dev_loss_tmo);
1685
1686 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1687
1688 /*
1689  * Host Statistics Management
1690  */
1691
1692 /* Show a given an attribute in the statistics group */
1693 static ssize_t
1694 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1695 {
1696         struct Scsi_Host *shost = transport_class_to_shost(dev);
1697         struct fc_internal *i = to_fc_internal(shost->transportt);
1698         struct fc_host_statistics *stats;
1699         ssize_t ret = -ENOENT;
1700
1701         if (offset > sizeof(struct fc_host_statistics) ||
1702             offset % sizeof(u64) != 0)
1703                 WARN_ON(1);
1704
1705         if (i->f->get_fc_host_stats) {
1706                 stats = (i->f->get_fc_host_stats)(shost);
1707                 if (stats)
1708                         ret = snprintf(buf, 20, "0x%llx\n",
1709                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1710         }
1711         return ret;
1712 }
1713
1714
1715 /* generate a read-only statistics attribute */
1716 #define fc_host_statistic(name)                                         \
1717 static ssize_t show_fcstat_##name(struct device *cd,                    \
1718                                   struct device_attribute *attr,        \
1719                                   char *buf)                            \
1720 {                                                                       \
1721         return fc_stat_show(cd, buf,                                    \
1722                             offsetof(struct fc_host_statistics, name)); \
1723 }                                                                       \
1724 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1725
1726 fc_host_statistic(seconds_since_last_reset);
1727 fc_host_statistic(tx_frames);
1728 fc_host_statistic(tx_words);
1729 fc_host_statistic(rx_frames);
1730 fc_host_statistic(rx_words);
1731 fc_host_statistic(lip_count);
1732 fc_host_statistic(nos_count);
1733 fc_host_statistic(error_frames);
1734 fc_host_statistic(dumped_frames);
1735 fc_host_statistic(link_failure_count);
1736 fc_host_statistic(loss_of_sync_count);
1737 fc_host_statistic(loss_of_signal_count);
1738 fc_host_statistic(prim_seq_protocol_err_count);
1739 fc_host_statistic(invalid_tx_word_count);
1740 fc_host_statistic(invalid_crc_count);
1741 fc_host_statistic(fcp_input_requests);
1742 fc_host_statistic(fcp_output_requests);
1743 fc_host_statistic(fcp_control_requests);
1744 fc_host_statistic(fcp_input_megabytes);
1745 fc_host_statistic(fcp_output_megabytes);
1746 fc_host_statistic(fcp_packet_alloc_failures);
1747 fc_host_statistic(fcp_packet_aborts);
1748 fc_host_statistic(fcp_frame_alloc_failures);
1749 fc_host_statistic(fc_no_free_exch);
1750 fc_host_statistic(fc_no_free_exch_xid);
1751 fc_host_statistic(fc_xid_not_found);
1752 fc_host_statistic(fc_xid_busy);
1753 fc_host_statistic(fc_seq_not_found);
1754 fc_host_statistic(fc_non_bls_resp);
1755
1756 static ssize_t
1757 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1758                     const char *buf, size_t count)
1759 {
1760         struct Scsi_Host *shost = transport_class_to_shost(dev);
1761         struct fc_internal *i = to_fc_internal(shost->transportt);
1762
1763         /* ignore any data value written to the attribute */
1764         if (i->f->reset_fc_host_stats) {
1765                 i->f->reset_fc_host_stats(shost);
1766                 return count;
1767         }
1768
1769         return -ENOENT;
1770 }
1771 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1772                                 fc_reset_statistics);
1773
1774 static struct attribute *fc_statistics_attrs[] = {
1775         &device_attr_host_seconds_since_last_reset.attr,
1776         &device_attr_host_tx_frames.attr,
1777         &device_attr_host_tx_words.attr,
1778         &device_attr_host_rx_frames.attr,
1779         &device_attr_host_rx_words.attr,
1780         &device_attr_host_lip_count.attr,
1781         &device_attr_host_nos_count.attr,
1782         &device_attr_host_error_frames.attr,
1783         &device_attr_host_dumped_frames.attr,
1784         &device_attr_host_link_failure_count.attr,
1785         &device_attr_host_loss_of_sync_count.attr,
1786         &device_attr_host_loss_of_signal_count.attr,
1787         &device_attr_host_prim_seq_protocol_err_count.attr,
1788         &device_attr_host_invalid_tx_word_count.attr,
1789         &device_attr_host_invalid_crc_count.attr,
1790         &device_attr_host_fcp_input_requests.attr,
1791         &device_attr_host_fcp_output_requests.attr,
1792         &device_attr_host_fcp_control_requests.attr,
1793         &device_attr_host_fcp_input_megabytes.attr,
1794         &device_attr_host_fcp_output_megabytes.attr,
1795         &device_attr_host_fcp_packet_alloc_failures.attr,
1796         &device_attr_host_fcp_packet_aborts.attr,
1797         &device_attr_host_fcp_frame_alloc_failures.attr,
1798         &device_attr_host_fc_no_free_exch.attr,
1799         &device_attr_host_fc_no_free_exch_xid.attr,
1800         &device_attr_host_fc_xid_not_found.attr,
1801         &device_attr_host_fc_xid_busy.attr,
1802         &device_attr_host_fc_seq_not_found.attr,
1803         &device_attr_host_fc_non_bls_resp.attr,
1804         &device_attr_host_reset_statistics.attr,
1805         NULL
1806 };
1807
1808 static struct attribute_group fc_statistics_group = {
1809         .name = "statistics",
1810         .attrs = fc_statistics_attrs,
1811 };
1812
1813
1814 /* Host Vport Attributes */
1815
1816 static int
1817 fc_parse_wwn(const char *ns, u64 *nm)
1818 {
1819         unsigned int i, j;
1820         u8 wwn[8];
1821
1822         memset(wwn, 0, sizeof(wwn));
1823
1824         /* Validate and store the new name */
1825         for (i=0, j=0; i < 16; i++) {
1826                 int value;
1827
1828                 value = hex_to_bin(*ns++);
1829                 if (value >= 0)
1830                         j = (j << 4) | value;
1831                 else
1832                         return -EINVAL;
1833                 if (i % 2) {
1834                         wwn[i/2] = j & 0xff;
1835                         j = 0;
1836                 }
1837         }
1838
1839         *nm = wwn_to_u64(wwn);
1840
1841         return 0;
1842 }
1843
1844
1845 /*
1846  * "Short-cut" sysfs variable to create a new vport on a FC Host.
1847  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1848  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1849  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1850  */
1851 static ssize_t
1852 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1853                            const char *buf, size_t count)
1854 {
1855         struct Scsi_Host *shost = transport_class_to_shost(dev);
1856         struct fc_vport_identifiers vid;
1857         struct fc_vport *vport;
1858         unsigned int cnt=count;
1859         int stat;
1860
1861         memset(&vid, 0, sizeof(vid));
1862
1863         /* count may include a LF at end of string */
1864         if (buf[cnt-1] == '\n')
1865                 cnt--;
1866
1867         /* validate we have enough characters for WWPN */
1868         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1869                 return -EINVAL;
1870
1871         stat = fc_parse_wwn(&buf[0], &vid.port_name);
1872         if (stat)
1873                 return stat;
1874
1875         stat = fc_parse_wwn(&buf[17], &vid.node_name);
1876         if (stat)
1877                 return stat;
1878
1879         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1880         vid.vport_type = FC_PORTTYPE_NPIV;
1881         /* vid.symbolic_name is already zero/NULL's */
1882         vid.disable = false;            /* always enabled */
1883
1884         /* we only allow support on Channel 0 !!! */
1885         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1886         return stat ? stat : count;
1887 }
1888 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1889                         store_fc_host_vport_create);
1890
1891
1892 /*
1893  * "Short-cut" sysfs variable to delete a vport on a FC Host.
1894  * Vport is identified by a string containing "<WWPN>:<WWNN>".
1895  * The WWNs are specified as hex characters, and may *not* contain
1896  * any prefixes (e.g. 0x, x, etc)
1897  */
1898 static ssize_t
1899 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1900                            const char *buf, size_t count)
1901 {
1902         struct Scsi_Host *shost = transport_class_to_shost(dev);
1903         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1904         struct fc_vport *vport;
1905         u64 wwpn, wwnn;
1906         unsigned long flags;
1907         unsigned int cnt=count;
1908         int stat, match;
1909
1910         /* count may include a LF at end of string */
1911         if (buf[cnt-1] == '\n')
1912                 cnt--;
1913
1914         /* validate we have enough characters for WWPN */
1915         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1916                 return -EINVAL;
1917
1918         stat = fc_parse_wwn(&buf[0], &wwpn);
1919         if (stat)
1920                 return stat;
1921
1922         stat = fc_parse_wwn(&buf[17], &wwnn);
1923         if (stat)
1924                 return stat;
1925
1926         spin_lock_irqsave(shost->host_lock, flags);
1927         match = 0;
1928         /* we only allow support on Channel 0 !!! */
1929         list_for_each_entry(vport, &fc_host->vports, peers) {
1930                 if ((vport->channel == 0) &&
1931                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1932                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1933                                 break;
1934                         vport->flags |= FC_VPORT_DELETING;
1935                         match = 1;
1936                         break;
1937                 }
1938         }
1939         spin_unlock_irqrestore(shost->host_lock, flags);
1940
1941         if (!match)
1942                 return -ENODEV;
1943
1944         stat = fc_vport_terminate(vport);
1945         return stat ? stat : count;
1946 }
1947 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1948                         store_fc_host_vport_delete);
1949
1950
1951 static int fc_host_match(struct attribute_container *cont,
1952                           struct device *dev)
1953 {
1954         struct Scsi_Host *shost;
1955         struct fc_internal *i;
1956
1957         if (!scsi_is_host_device(dev))
1958                 return 0;
1959
1960         shost = dev_to_shost(dev);
1961         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1962             != &fc_host_class.class)
1963                 return 0;
1964
1965         i = to_fc_internal(shost->transportt);
1966
1967         return &i->t.host_attrs.ac == cont;
1968 }
1969
1970 static int fc_target_match(struct attribute_container *cont,
1971                             struct device *dev)
1972 {
1973         struct Scsi_Host *shost;
1974         struct fc_internal *i;
1975
1976         if (!scsi_is_target_device(dev))
1977                 return 0;
1978
1979         shost = dev_to_shost(dev->parent);
1980         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1981             != &fc_host_class.class)
1982                 return 0;
1983
1984         i = to_fc_internal(shost->transportt);
1985
1986         return &i->t.target_attrs.ac == cont;
1987 }
1988
1989 static void fc_rport_dev_release(struct device *dev)
1990 {
1991         struct fc_rport *rport = dev_to_rport(dev);
1992         put_device(dev->parent);
1993         kfree(rport);
1994 }
1995
1996 int scsi_is_fc_rport(const struct device *dev)
1997 {
1998         return dev->release == fc_rport_dev_release;
1999 }
2000 EXPORT_SYMBOL(scsi_is_fc_rport);
2001
2002 static int fc_rport_match(struct attribute_container *cont,
2003                             struct device *dev)
2004 {
2005         struct Scsi_Host *shost;
2006         struct fc_internal *i;
2007
2008         if (!scsi_is_fc_rport(dev))
2009                 return 0;
2010
2011         shost = dev_to_shost(dev->parent);
2012         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2013             != &fc_host_class.class)
2014                 return 0;
2015
2016         i = to_fc_internal(shost->transportt);
2017
2018         return &i->rport_attr_cont.ac == cont;
2019 }
2020
2021
2022 static void fc_vport_dev_release(struct device *dev)
2023 {
2024         struct fc_vport *vport = dev_to_vport(dev);
2025         put_device(dev->parent);                /* release kobj parent */
2026         kfree(vport);
2027 }
2028
2029 int scsi_is_fc_vport(const struct device *dev)
2030 {
2031         return dev->release == fc_vport_dev_release;
2032 }
2033 EXPORT_SYMBOL(scsi_is_fc_vport);
2034
2035 static int fc_vport_match(struct attribute_container *cont,
2036                             struct device *dev)
2037 {
2038         struct fc_vport *vport;
2039         struct Scsi_Host *shost;
2040         struct fc_internal *i;
2041
2042         if (!scsi_is_fc_vport(dev))
2043                 return 0;
2044         vport = dev_to_vport(dev);
2045
2046         shost = vport_to_shost(vport);
2047         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2048             != &fc_host_class.class)
2049                 return 0;
2050
2051         i = to_fc_internal(shost->transportt);
2052         return &i->vport_attr_cont.ac == cont;
2053 }
2054
2055
2056 /**
2057  * fc_timed_out - FC Transport I/O timeout intercept handler
2058  * @scmd:       The SCSI command which timed out
2059  *
2060  * This routine protects against error handlers getting invoked while a
2061  * rport is in a blocked state, typically due to a temporarily loss of
2062  * connectivity. If the error handlers are allowed to proceed, requests
2063  * to abort i/o, reset the target, etc will likely fail as there is no way
2064  * to communicate with the device to perform the requested function. These
2065  * failures may result in the midlayer taking the device offline, requiring
2066  * manual intervention to restore operation.
2067  *
2068  * This routine, called whenever an i/o times out, validates the state of
2069  * the underlying rport. If the rport is blocked, it returns
2070  * EH_RESET_TIMER, which will continue to reschedule the timeout.
2071  * Eventually, either the device will return, or devloss_tmo will fire,
2072  * and when the timeout then fires, it will be handled normally.
2073  * If the rport is not blocked, normal error handling continues.
2074  *
2075  * Notes:
2076  *      This routine assumes no locks are held on entry.
2077  */
2078 static enum blk_eh_timer_return
2079 fc_timed_out(struct scsi_cmnd *scmd)
2080 {
2081         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2082
2083         if (rport->port_state == FC_PORTSTATE_BLOCKED)
2084                 return BLK_EH_RESET_TIMER;
2085
2086         return BLK_EH_NOT_HANDLED;
2087 }
2088
2089 /*
2090  * Called by fc_user_scan to locate an rport on the shost that
2091  * matches the channel and target id, and invoke scsi_scan_target()
2092  * on the rport.
2093  */
2094 static void
2095 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2096 {
2097         struct fc_rport *rport;
2098         unsigned long flags;
2099
2100         spin_lock_irqsave(shost->host_lock, flags);
2101
2102         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2103                 if (rport->scsi_target_id == -1)
2104                         continue;
2105
2106                 if (rport->port_state != FC_PORTSTATE_ONLINE)
2107                         continue;
2108
2109                 if ((channel == rport->channel) &&
2110                     (id == rport->scsi_target_id)) {
2111                         spin_unlock_irqrestore(shost->host_lock, flags);
2112                         scsi_scan_target(&rport->dev, channel, id, lun, 1);
2113                         return;
2114                 }
2115         }
2116
2117         spin_unlock_irqrestore(shost->host_lock, flags);
2118 }
2119
2120 /*
2121  * Called via sysfs scan routines. Necessary, as the FC transport
2122  * wants to place all target objects below the rport object. So this
2123  * routine must invoke the scsi_scan_target() routine with the rport
2124  * object as the parent.
2125  */
2126 static int
2127 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2128 {
2129         uint chlo, chhi;
2130         uint tgtlo, tgthi;
2131
2132         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2133             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2134             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2135                 return -EINVAL;
2136
2137         if (channel == SCAN_WILD_CARD) {
2138                 chlo = 0;
2139                 chhi = shost->max_channel + 1;
2140         } else {
2141                 chlo = channel;
2142                 chhi = channel + 1;
2143         }
2144
2145         if (id == SCAN_WILD_CARD) {
2146                 tgtlo = 0;
2147                 tgthi = shost->max_id;
2148         } else {
2149                 tgtlo = id;
2150                 tgthi = id + 1;
2151         }
2152
2153         for ( ; chlo < chhi; chlo++)
2154                 for ( ; tgtlo < tgthi; tgtlo++)
2155                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2156
2157         return 0;
2158 }
2159
2160 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2161                                 int result)
2162 {
2163         struct fc_internal *i = to_fc_internal(shost->transportt);
2164         return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2165 }
2166
2167 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2168 {
2169         struct fc_internal *i = to_fc_internal(shost->transportt);
2170         return i->f->it_nexus_response(shost, nexus, result);
2171 }
2172
2173 struct scsi_transport_template *
2174 fc_attach_transport(struct fc_function_template *ft)
2175 {
2176         int count;
2177         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2178                                         GFP_KERNEL);
2179
2180         if (unlikely(!i))
2181                 return NULL;
2182
2183         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2184         i->t.target_attrs.ac.class = &fc_transport_class.class;
2185         i->t.target_attrs.ac.match = fc_target_match;
2186         i->t.target_size = sizeof(struct fc_starget_attrs);
2187         transport_container_register(&i->t.target_attrs);
2188
2189         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2190         i->t.host_attrs.ac.class = &fc_host_class.class;
2191         i->t.host_attrs.ac.match = fc_host_match;
2192         i->t.host_size = sizeof(struct fc_host_attrs);
2193         if (ft->get_fc_host_stats)
2194                 i->t.host_attrs.statistics = &fc_statistics_group;
2195         transport_container_register(&i->t.host_attrs);
2196
2197         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2198         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2199         i->rport_attr_cont.ac.match = fc_rport_match;
2200         transport_container_register(&i->rport_attr_cont);
2201
2202         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2203         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2204         i->vport_attr_cont.ac.match = fc_vport_match;
2205         transport_container_register(&i->vport_attr_cont);
2206
2207         i->f = ft;
2208
2209         /* Transport uses the shost workq for scsi scanning */
2210         i->t.create_work_queue = 1;
2211
2212         i->t.eh_timed_out = fc_timed_out;
2213
2214         i->t.user_scan = fc_user_scan;
2215
2216         /* target-mode drivers' functions */
2217         i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2218         i->t.it_nexus_response = fc_it_nexus_response;
2219
2220         /*
2221          * Setup SCSI Target Attributes.
2222          */
2223         count = 0;
2224         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2225         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2226         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2227
2228         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2229
2230         i->starget_attrs[count] = NULL;
2231
2232
2233         /*
2234          * Setup SCSI Host Attributes.
2235          */
2236         count=0;
2237         SETUP_HOST_ATTRIBUTE_RD(node_name);
2238         SETUP_HOST_ATTRIBUTE_RD(port_name);
2239         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2240         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2241         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2242         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2243         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2244         if (ft->vport_create) {
2245                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2246                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2247         }
2248         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2249         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2250         SETUP_HOST_ATTRIBUTE_RD(model);
2251         SETUP_HOST_ATTRIBUTE_RD(model_description);
2252         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2253         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2254         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2255         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2256
2257         SETUP_HOST_ATTRIBUTE_RD(port_id);
2258         SETUP_HOST_ATTRIBUTE_RD(port_type);
2259         SETUP_HOST_ATTRIBUTE_RD(port_state);
2260         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2261         SETUP_HOST_ATTRIBUTE_RD(speed);
2262         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2263         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2264         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2265
2266         /* Transport-managed attributes */
2267         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2268         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2269         if (ft->issue_fc_host_lip)
2270                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2271         if (ft->vport_create)
2272                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2273         if (ft->vport_delete)
2274                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2275
2276         BUG_ON(count > FC_HOST_NUM_ATTRS);
2277
2278         i->host_attrs[count] = NULL;
2279
2280         /*
2281          * Setup Remote Port Attributes.
2282          */
2283         count=0;
2284         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2285         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2286         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2287         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2288         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2289         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2290         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2291         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2292         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2293         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2294
2295         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2296
2297         i->rport_attrs[count] = NULL;
2298
2299         /*
2300          * Setup Virtual Port Attributes.
2301          */
2302         count=0;
2303         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2304         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2305         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2306         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2307         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2308         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2309         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2310         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2311         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2312
2313         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2314
2315         i->vport_attrs[count] = NULL;
2316
2317         return &i->t;
2318 }
2319 EXPORT_SYMBOL(fc_attach_transport);
2320
2321 void fc_release_transport(struct scsi_transport_template *t)
2322 {
2323         struct fc_internal *i = to_fc_internal(t);
2324
2325         transport_container_unregister(&i->t.target_attrs);
2326         transport_container_unregister(&i->t.host_attrs);
2327         transport_container_unregister(&i->rport_attr_cont);
2328         transport_container_unregister(&i->vport_attr_cont);
2329
2330         kfree(i);
2331 }
2332 EXPORT_SYMBOL(fc_release_transport);
2333
2334 /**
2335  * fc_queue_work - Queue work to the fc_host workqueue.
2336  * @shost:      Pointer to Scsi_Host bound to fc_host.
2337  * @work:       Work to queue for execution.
2338  *
2339  * Return value:
2340  *      1 - work queued for execution
2341  *      0 - work is already queued
2342  *      -EINVAL - work queue doesn't exist
2343  */
2344 static int
2345 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2346 {
2347         if (unlikely(!fc_host_work_q(shost))) {
2348                 printk(KERN_ERR
2349                         "ERROR: FC host '%s' attempted to queue work, "
2350                         "when no workqueue created.\n", shost->hostt->name);
2351                 dump_stack();
2352
2353                 return -EINVAL;
2354         }
2355
2356         return queue_work(fc_host_work_q(shost), work);
2357 }
2358
2359 /**
2360  * fc_flush_work - Flush a fc_host's workqueue.
2361  * @shost:      Pointer to Scsi_Host bound to fc_host.
2362  */
2363 static void
2364 fc_flush_work(struct Scsi_Host *shost)
2365 {
2366         if (!fc_host_work_q(shost)) {
2367                 printk(KERN_ERR
2368                         "ERROR: FC host '%s' attempted to flush work, "
2369                         "when no workqueue created.\n", shost->hostt->name);
2370                 dump_stack();
2371                 return;
2372         }
2373
2374         flush_workqueue(fc_host_work_q(shost));
2375 }
2376
2377 /**
2378  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2379  * @shost:      Pointer to Scsi_Host bound to fc_host.
2380  * @work:       Work to queue for execution.
2381  * @delay:      jiffies to delay the work queuing
2382  *
2383  * Return value:
2384  *      1 on success / 0 already queued / < 0 for error
2385  */
2386 static int
2387 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2388                                 unsigned long delay)
2389 {
2390         if (unlikely(!fc_host_devloss_work_q(shost))) {
2391                 printk(KERN_ERR
2392                         "ERROR: FC host '%s' attempted to queue work, "
2393                         "when no workqueue created.\n", shost->hostt->name);
2394                 dump_stack();
2395
2396                 return -EINVAL;
2397         }
2398
2399         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2400 }
2401
2402 /**
2403  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2404  * @shost:      Pointer to Scsi_Host bound to fc_host.
2405  */
2406 static void
2407 fc_flush_devloss(struct Scsi_Host *shost)
2408 {
2409         if (!fc_host_devloss_work_q(shost)) {
2410                 printk(KERN_ERR
2411                         "ERROR: FC host '%s' attempted to flush work, "
2412                         "when no workqueue created.\n", shost->hostt->name);
2413                 dump_stack();
2414                 return;
2415         }
2416
2417         flush_workqueue(fc_host_devloss_work_q(shost));
2418 }
2419
2420
2421 /**
2422  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2423  * @shost:      Which &Scsi_Host
2424  *
2425  * This routine is expected to be called immediately preceding the
2426  * a driver's call to scsi_remove_host().
2427  *
2428  * WARNING: A driver utilizing the fc_transport, which fails to call
2429  *   this routine prior to scsi_remove_host(), will leave dangling
2430  *   objects in /sys/class/fc_remote_ports. Access to any of these
2431  *   objects can result in a system crash !!!
2432  *
2433  * Notes:
2434  *      This routine assumes no locks are held on entry.
2435  */
2436 void
2437 fc_remove_host(struct Scsi_Host *shost)
2438 {
2439         struct fc_vport *vport = NULL, *next_vport = NULL;
2440         struct fc_rport *rport = NULL, *next_rport = NULL;
2441         struct workqueue_struct *work_q;
2442         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2443         unsigned long flags;
2444
2445         spin_lock_irqsave(shost->host_lock, flags);
2446
2447         /* Remove any vports */
2448         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2449                 fc_queue_work(shost, &vport->vport_delete_work);
2450
2451         /* Remove any remote ports */
2452         list_for_each_entry_safe(rport, next_rport,
2453                         &fc_host->rports, peers) {
2454                 list_del(&rport->peers);
2455                 rport->port_state = FC_PORTSTATE_DELETED;
2456                 fc_queue_work(shost, &rport->rport_delete_work);
2457         }
2458
2459         list_for_each_entry_safe(rport, next_rport,
2460                         &fc_host->rport_bindings, peers) {
2461                 list_del(&rport->peers);
2462                 rport->port_state = FC_PORTSTATE_DELETED;
2463                 fc_queue_work(shost, &rport->rport_delete_work);
2464         }
2465
2466         spin_unlock_irqrestore(shost->host_lock, flags);
2467
2468         /* flush all scan work items */
2469         scsi_flush_work(shost);
2470
2471         /* flush all stgt delete, and rport delete work items, then kill it  */
2472         if (fc_host->work_q) {
2473                 work_q = fc_host->work_q;
2474                 fc_host->work_q = NULL;
2475                 destroy_workqueue(work_q);
2476         }
2477
2478         /* flush all devloss work items, then kill it  */
2479         if (fc_host->devloss_work_q) {
2480                 work_q = fc_host->devloss_work_q;
2481                 fc_host->devloss_work_q = NULL;
2482                 destroy_workqueue(work_q);
2483         }
2484 }
2485 EXPORT_SYMBOL(fc_remove_host);
2486
2487 static void fc_terminate_rport_io(struct fc_rport *rport)
2488 {
2489         struct Scsi_Host *shost = rport_to_shost(rport);
2490         struct fc_internal *i = to_fc_internal(shost->transportt);
2491
2492         /* Involve the LLDD if possible to terminate all io on the rport. */
2493         if (i->f->terminate_rport_io)
2494                 i->f->terminate_rport_io(rport);
2495
2496         /*
2497          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2498          */
2499         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2500 }
2501
2502 /**
2503  * fc_starget_delete - called to delete the scsi descendants of an rport
2504  * @work:       remote port to be operated on.
2505  *
2506  * Deletes target and all sdevs.
2507  */
2508 static void
2509 fc_starget_delete(struct work_struct *work)
2510 {
2511         struct fc_rport *rport =
2512                 container_of(work, struct fc_rport, stgt_delete_work);
2513
2514         fc_terminate_rport_io(rport);
2515         scsi_remove_target(&rport->dev);
2516 }
2517
2518
2519 /**
2520  * fc_rport_final_delete - finish rport termination and delete it.
2521  * @work:       remote port to be deleted.
2522  */
2523 static void
2524 fc_rport_final_delete(struct work_struct *work)
2525 {
2526         struct fc_rport *rport =
2527                 container_of(work, struct fc_rport, rport_delete_work);
2528         struct device *dev = &rport->dev;
2529         struct Scsi_Host *shost = rport_to_shost(rport);
2530         struct fc_internal *i = to_fc_internal(shost->transportt);
2531         unsigned long flags;
2532         int do_callback = 0;
2533
2534         fc_terminate_rport_io(rport);
2535
2536         /*
2537          * if a scan is pending, flush the SCSI Host work_q so that
2538          * that we can reclaim the rport scan work element.
2539          */
2540         if (rport->flags & FC_RPORT_SCAN_PENDING)
2541                 scsi_flush_work(shost);
2542
2543         /*
2544          * Cancel any outstanding timers. These should really exist
2545          * only when rmmod'ing the LLDD and we're asking for
2546          * immediate termination of the rports
2547          */
2548         spin_lock_irqsave(shost->host_lock, flags);
2549         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2550                 spin_unlock_irqrestore(shost->host_lock, flags);
2551                 if (!cancel_delayed_work(&rport->fail_io_work))
2552                         fc_flush_devloss(shost);
2553                 if (!cancel_delayed_work(&rport->dev_loss_work))
2554                         fc_flush_devloss(shost);
2555                 cancel_work_sync(&rport->scan_work);
2556                 spin_lock_irqsave(shost->host_lock, flags);
2557                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2558         }
2559         spin_unlock_irqrestore(shost->host_lock, flags);
2560
2561         /* Delete SCSI target and sdevs */
2562         if (rport->scsi_target_id != -1)
2563                 fc_starget_delete(&rport->stgt_delete_work);
2564
2565         /*
2566          * Notify the driver that the rport is now dead. The LLDD will
2567          * also guarantee that any communication to the rport is terminated
2568          *
2569          * Avoid this call if we already called it when we preserved the
2570          * rport for the binding.
2571          */
2572         spin_lock_irqsave(shost->host_lock, flags);
2573         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2574             (i->f->dev_loss_tmo_callbk)) {
2575                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2576                 do_callback = 1;
2577         }
2578         spin_unlock_irqrestore(shost->host_lock, flags);
2579
2580         if (do_callback)
2581                 i->f->dev_loss_tmo_callbk(rport);
2582
2583         fc_bsg_remove(rport->rqst_q);
2584
2585         transport_remove_device(dev);
2586         device_del(dev);
2587         transport_destroy_device(dev);
2588         put_device(&shost->shost_gendev);       /* for fc_host->rport list */
2589         put_device(dev);                        /* for self-reference */
2590 }
2591
2592
2593 /**
2594  * fc_rport_create - allocates and creates a remote FC port.
2595  * @shost:      scsi host the remote port is connected to.
2596  * @channel:    Channel on shost port connected to.
2597  * @ids:        The world wide names, fc address, and FC4 port
2598  *              roles for the remote port.
2599  *
2600  * Allocates and creates the remoter port structure, including the
2601  * class and sysfs creation.
2602  *
2603  * Notes:
2604  *      This routine assumes no locks are held on entry.
2605  */
2606 static struct fc_rport *
2607 fc_rport_create(struct Scsi_Host *shost, int channel,
2608         struct fc_rport_identifiers  *ids)
2609 {
2610         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2611         struct fc_internal *fci = to_fc_internal(shost->transportt);
2612         struct fc_rport *rport;
2613         struct device *dev;
2614         unsigned long flags;
2615         int error;
2616         size_t size;
2617
2618         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2619         rport = kzalloc(size, GFP_KERNEL);
2620         if (unlikely(!rport)) {
2621                 printk(KERN_ERR "%s: allocation failure\n", __func__);
2622                 return NULL;
2623         }
2624
2625         rport->maxframe_size = -1;
2626         rport->supported_classes = FC_COS_UNSPECIFIED;
2627         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2628         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2629         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2630         rport->port_id = ids->port_id;
2631         rport->roles = ids->roles;
2632         rport->port_state = FC_PORTSTATE_ONLINE;
2633         if (fci->f->dd_fcrport_size)
2634                 rport->dd_data = &rport[1];
2635         rport->channel = channel;
2636         rport->fast_io_fail_tmo = -1;
2637
2638         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2639         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2640         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2641         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2642         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2643
2644         spin_lock_irqsave(shost->host_lock, flags);
2645
2646         rport->number = fc_host->next_rport_number++;
2647         if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2648                 rport->scsi_target_id = fc_host->next_target_id++;
2649         else
2650                 rport->scsi_target_id = -1;
2651         list_add_tail(&rport->peers, &fc_host->rports);
2652         get_device(&shost->shost_gendev);       /* for fc_host->rport list */
2653
2654         spin_unlock_irqrestore(shost->host_lock, flags);
2655
2656         dev = &rport->dev;
2657         device_initialize(dev);                 /* takes self reference */
2658         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2659         dev->release = fc_rport_dev_release;
2660         dev_set_name(dev, "rport-%d:%d-%d",
2661                      shost->host_no, channel, rport->number);
2662         transport_setup_device(dev);
2663
2664         error = device_add(dev);
2665         if (error) {
2666                 printk(KERN_ERR "FC Remote Port device_add failed\n");
2667                 goto delete_rport;
2668         }
2669         transport_add_device(dev);
2670         transport_configure_device(dev);
2671
2672         fc_bsg_rportadd(shost, rport);
2673         /* ignore any bsg add error - we just can't do sgio */
2674
2675         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2676                 /* initiate a scan of the target */
2677                 rport->flags |= FC_RPORT_SCAN_PENDING;
2678                 scsi_queue_work(shost, &rport->scan_work);
2679         }
2680
2681         return rport;
2682
2683 delete_rport:
2684         transport_destroy_device(dev);
2685         spin_lock_irqsave(shost->host_lock, flags);
2686         list_del(&rport->peers);
2687         put_device(&shost->shost_gendev);       /* for fc_host->rport list */
2688         spin_unlock_irqrestore(shost->host_lock, flags);
2689         put_device(dev->parent);
2690         kfree(rport);
2691         return NULL;
2692 }
2693
2694 /**
2695  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2696  * @shost:      scsi host the remote port is connected to.
2697  * @channel:    Channel on shost port connected to.
2698  * @ids:        The world wide names, fc address, and FC4 port
2699  *              roles for the remote port.
2700  *
2701  * The LLDD calls this routine to notify the transport of the existence
2702  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2703  * of the port, it's FC address (port_id), and the FC4 roles that are
2704  * active for the port.
2705  *
2706  * For ports that are FCP targets (aka scsi targets), the FC transport
2707  * maintains consistent target id bindings on behalf of the LLDD.
2708  * A consistent target id binding is an assignment of a target id to
2709  * a remote port identifier, which persists while the scsi host is
2710  * attached. The remote port can disappear, then later reappear, and
2711  * it's target id assignment remains the same. This allows for shifts
2712  * in FC addressing (if binding by wwpn or wwnn) with no apparent
2713  * changes to the scsi subsystem which is based on scsi host number and
2714  * target id values.  Bindings are only valid during the attachment of
2715  * the scsi host. If the host detaches, then later re-attaches, target
2716  * id bindings may change.
2717  *
2718  * This routine is responsible for returning a remote port structure.
2719  * The routine will search the list of remote ports it maintains
2720  * internally on behalf of consistent target id mappings. If found, the
2721  * remote port structure will be reused. Otherwise, a new remote port
2722  * structure will be allocated.
2723  *
2724  * Whenever a remote port is allocated, a new fc_remote_port class
2725  * device is created.
2726  *
2727  * Should not be called from interrupt context.
2728  *
2729  * Notes:
2730  *      This routine assumes no locks are held on entry.
2731  */
2732 struct fc_rport *
2733 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2734         struct fc_rport_identifiers  *ids)
2735 {
2736         struct fc_internal *fci = to_fc_internal(shost->transportt);
2737         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2738         struct fc_rport *rport;
2739         unsigned long flags;
2740         int match = 0;
2741
2742         /* ensure any stgt delete functions are done */
2743         fc_flush_work(shost);
2744
2745         /*
2746          * Search the list of "active" rports, for an rport that has been
2747          * deleted, but we've held off the real delete while the target
2748          * is in a "blocked" state.
2749          */
2750         spin_lock_irqsave(shost->host_lock, flags);
2751
2752         list_for_each_entry(rport, &fc_host->rports, peers) {
2753
2754                 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2755                         (rport->channel == channel)) {
2756
2757                         switch (fc_host->tgtid_bind_type) {
2758                         case FC_TGTID_BIND_BY_WWPN:
2759                         case FC_TGTID_BIND_NONE:
2760                                 if (rport->port_name == ids->port_name)
2761                                         match = 1;
2762                                 break;
2763                         case FC_TGTID_BIND_BY_WWNN:
2764                                 if (rport->node_name == ids->node_name)
2765                                         match = 1;
2766                                 break;
2767                         case FC_TGTID_BIND_BY_ID:
2768                                 if (rport->port_id == ids->port_id)
2769                                         match = 1;
2770                                 break;
2771                         }
2772
2773                         if (match) {
2774
2775                                 memcpy(&rport->node_name, &ids->node_name,
2776                                         sizeof(rport->node_name));
2777                                 memcpy(&rport->port_name, &ids->port_name,
2778                                         sizeof(rport->port_name));
2779                                 rport->port_id = ids->port_id;
2780
2781                                 rport->port_state = FC_PORTSTATE_ONLINE;
2782                                 rport->roles = ids->roles;
2783
2784                                 spin_unlock_irqrestore(shost->host_lock, flags);
2785
2786                                 if (fci->f->dd_fcrport_size)
2787                                         memset(rport->dd_data, 0,
2788                                                 fci->f->dd_fcrport_size);
2789
2790                                 /*
2791                                  * If we were not a target, cancel the
2792                                  * io terminate and rport timers, and
2793                                  * we're done.
2794                                  *
2795                                  * If we were a target, but our new role
2796                                  * doesn't indicate a target, leave the
2797                                  * timers running expecting the role to
2798                                  * change as the target fully logs in. If
2799                                  * it doesn't, the target will be torn down.
2800                                  *
2801                                  * If we were a target, and our role shows
2802                                  * we're still a target, cancel the timers
2803                                  * and kick off a scan.
2804                                  */
2805
2806                                 /* was a target, not in roles */
2807                                 if ((rport->scsi_target_id != -1) &&
2808                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2809                                         return rport;
2810
2811                                 /*
2812                                  * Stop the fail io and dev_loss timers.
2813                                  * If they flush, the port_state will
2814                                  * be checked and will NOOP the function.
2815                                  */
2816                                 if (!cancel_delayed_work(&rport->fail_io_work))
2817                                         fc_flush_devloss(shost);
2818                                 if (!cancel_delayed_work(&rport->dev_loss_work))
2819                                         fc_flush_devloss(shost);
2820
2821                                 spin_lock_irqsave(shost->host_lock, flags);
2822
2823                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2824                                                   FC_RPORT_DEVLOSS_PENDING |
2825                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
2826
2827                                 spin_unlock_irqrestore(shost->host_lock, flags);
2828
2829                                 /* if target, initiate a scan */
2830                                 if (rport->scsi_target_id != -1) {
2831                                         scsi_target_unblock(&rport->dev,
2832                                                             SDEV_RUNNING);
2833                                         spin_lock_irqsave(shost->host_lock,
2834                                                           flags);
2835                                         rport->flags |= FC_RPORT_SCAN_PENDING;
2836                                         scsi_queue_work(shost,
2837                                                         &rport->scan_work);
2838                                         spin_unlock_irqrestore(shost->host_lock,
2839                                                         flags);
2840                                 }
2841
2842                                 fc_bsg_goose_queue(rport);
2843
2844                                 return rport;
2845                         }
2846                 }
2847         }
2848
2849         /*
2850          * Search the bindings array
2851          * Note: if never a FCP target, you won't be on this list
2852          */
2853         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2854
2855                 /* search for a matching consistent binding */
2856
2857                 list_for_each_entry(rport, &fc_host->rport_bindings,
2858                                         peers) {
2859                         if (rport->channel != channel)
2860                                 continue;
2861
2862                         switch (fc_host->tgtid_bind_type) {
2863                         case FC_TGTID_BIND_BY_WWPN:
2864                                 if (rport->port_name == ids->port_name)
2865                                         match = 1;
2866                                 break;
2867                         case FC_TGTID_BIND_BY_WWNN:
2868                                 if (rport->node_name == ids->node_name)
2869                                         match = 1;
2870                                 break;
2871                         case FC_TGTID_BIND_BY_ID:
2872                                 if (rport->port_id == ids->port_id)
2873                                         match = 1;
2874                                 break;
2875                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2876                                 break;
2877                         }
2878
2879                         if (match) {
2880                                 list_move_tail(&rport->peers, &fc_host->rports);
2881                                 break;
2882                         }
2883                 }
2884
2885                 if (match) {
2886                         memcpy(&rport->node_name, &ids->node_name,
2887                                 sizeof(rport->node_name));
2888                         memcpy(&rport->port_name, &ids->port_name,
2889                                 sizeof(rport->port_name));
2890                         rport->port_id = ids->port_id;
2891                         rport->roles = ids->roles;
2892                         rport->port_state = FC_PORTSTATE_ONLINE;
2893                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2894
2895                         if (fci->f->dd_fcrport_size)
2896                                 memset(rport->dd_data, 0,
2897                                                 fci->f->dd_fcrport_size);
2898                         spin_unlock_irqrestore(shost->host_lock, flags);
2899
2900                         if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
2901                                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
2902
2903                                 /* initiate a scan of the target */
2904                                 spin_lock_irqsave(shost->host_lock, flags);
2905                                 rport->flags |= FC_RPORT_SCAN_PENDING;
2906                                 scsi_queue_work(shost, &rport->scan_work);
2907                                 spin_unlock_irqrestore(shost->host_lock, flags);
2908                         }
2909                         return rport;
2910                 }
2911         }
2912
2913         spin_unlock_irqrestore(shost->host_lock, flags);
2914
2915         /* No consistent binding found - create new remote port entry */
2916         rport = fc_rport_create(shost, channel, ids);
2917
2918         return rport;
2919 }
2920 EXPORT_SYMBOL(fc_remote_port_add);
2921
2922
2923 /**
2924  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2925  * @rport:      The remote port that no longer exists
2926  *
2927  * The LLDD calls this routine to notify the transport that a remote
2928  * port is no longer part of the topology. Note: Although a port
2929  * may no longer be part of the topology, it may persist in the remote
2930  * ports displayed by the fc_host. We do this under 2 conditions:
2931  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2932  *   This allows the port to temporarily disappear, then reappear without
2933  *   disrupting the SCSI device tree attached to it. During the "blocked"
2934  *   period the port will still exist.
2935  * 2) If the port was a scsi target and disappears for longer than we
2936  *   expect, we'll delete the port and the tear down the SCSI device tree
2937  *   attached to it. However, we want to semi-persist the target id assigned
2938  *   to that port if it eventually does exist. The port structure will
2939  *   remain (although with minimal information) so that the target id
2940  *   bindings remails.
2941  *
2942  * If the remote port is not an FCP Target, it will be fully torn down
2943  * and deallocated, including the fc_remote_port class device.
2944  *
2945  * If the remote port is an FCP Target, the port will be placed in a
2946  * temporary blocked state. From the LLDD's perspective, the rport no
2947  * longer exists. From the SCSI midlayer's perspective, the SCSI target
2948  * exists, but all sdevs on it are blocked from further I/O. The following
2949  * is then expected.
2950  *
2951  *   If the remote port does not return (signaled by a LLDD call to
2952  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2953  *   scsi target is removed - killing all outstanding i/o and removing the
2954  *   scsi devices attached ot it. The port structure will be marked Not
2955  *   Present and be partially cleared, leaving only enough information to
2956  *   recognize the remote port relative to the scsi target id binding if
2957  *   it later appears.  The port will remain as long as there is a valid
2958  *   binding (e.g. until the user changes the binding type or unloads the
2959  *   scsi host with the binding).
2960  *
2961  *   If the remote port returns within the dev_loss_tmo value (and matches
2962  *   according to the target id binding type), the port structure will be
2963  *   reused. If it is no longer a SCSI target, the target will be torn
2964  *   down. If it continues to be a SCSI target, then the target will be
2965  *   unblocked (allowing i/o to be resumed), and a scan will be activated
2966  *   to ensure that all luns are detected.
2967  *
2968  * Called from normal process context only - cannot be called from interrupt.
2969  *
2970  * Notes:
2971  *      This routine assumes no locks are held on entry.
2972  */
2973 void
2974 fc_remote_port_delete(struct fc_rport  *rport)
2975 {
2976         struct Scsi_Host *shost = rport_to_shost(rport);
2977         unsigned long timeout = rport->dev_loss_tmo;
2978         unsigned long flags;
2979
2980         /*
2981          * No need to flush the fc_host work_q's, as all adds are synchronous.
2982          *
2983          * We do need to reclaim the rport scan work element, so eventually
2984          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2985          * there's still a scan pending.
2986          */
2987
2988         spin_lock_irqsave(shost->host_lock, flags);
2989
2990         if (rport->port_state != FC_PORTSTATE_ONLINE) {
2991                 spin_unlock_irqrestore(shost->host_lock, flags);
2992                 return;
2993         }
2994
2995         /*
2996          * In the past, we if this was not an FCP-Target, we would
2997          * unconditionally just jump to deleting the rport.
2998          * However, rports can be used as node containers by the LLDD,
2999          * and its not appropriate to just terminate the rport at the
3000          * first sign of a loss in connectivity. The LLDD may want to
3001          * send ELS traffic to re-validate the login. If the rport is
3002          * immediately deleted, it makes it inappropriate for a node
3003          * container.
3004          * So... we now unconditionally wait dev_loss_tmo before
3005          * destroying an rport.
3006          */
3007
3008         rport->port_state = FC_PORTSTATE_BLOCKED;
3009
3010         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3011
3012         spin_unlock_irqrestore(shost->host_lock, flags);
3013
3014         scsi_target_block(&rport->dev);
3015
3016         /* see if we need to kill io faster than waiting for device loss */
3017         if ((rport->fast_io_fail_tmo != -1) &&
3018             (rport->fast_io_fail_tmo < timeout))
3019                 fc_queue_devloss_work(shost, &rport->fail_io_work,
3020                                         rport->fast_io_fail_tmo * HZ);
3021
3022         /* cap the length the devices can be blocked until they are deleted */
3023         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3024 }
3025 EXPORT_SYMBOL(fc_remote_port_delete);
3026
3027 /**
3028  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3029  * @rport:      The remote port that changed.
3030  * @roles:      New roles for this port.
3031  *
3032  * Description: The LLDD calls this routine to notify the transport that the
3033  * roles on a remote port may have changed. The largest effect of this is
3034  * if a port now becomes a FCP Target, it must be allocated a
3035  * scsi target id.  If the port is no longer a FCP target, any
3036  * scsi target id value assigned to it will persist in case the
3037  * role changes back to include FCP Target. No changes in the scsi
3038  * midlayer will be invoked if the role changes (in the expectation
3039  * that the role will be resumed. If it doesn't normal error processing
3040  * will take place).
3041  *
3042  * Should not be called from interrupt context.
3043  *
3044  * Notes:
3045  *      This routine assumes no locks are held on entry.
3046  */
3047 void
3048 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3049 {
3050         struct Scsi_Host *shost = rport_to_shost(rport);
3051         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3052         unsigned long flags;
3053         int create = 0;
3054
3055         spin_lock_irqsave(shost->host_lock, flags);
3056         if (roles & FC_PORT_ROLE_FCP_TARGET) {
3057                 if (rport->scsi_target_id == -1) {
3058                         rport->scsi_target_id = fc_host->next_target_id++;
3059                         create = 1;
3060                 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3061                         create = 1;
3062         }
3063
3064         rport->roles = roles;
3065
3066         spin_unlock_irqrestore(shost->host_lock, flags);
3067
3068         if (create) {
3069                 /*
3070                  * There may have been a delete timer running on the
3071                  * port. Ensure that it is cancelled as we now know
3072                  * the port is an FCP Target.
3073                  * Note: we know the rport is exists and in an online
3074                  *  state as the LLDD would not have had an rport
3075                  *  reference to pass us.
3076                  *
3077                  * Take no action on the del_timer failure as the state
3078                  * machine state change will validate the
3079                  * transaction.
3080                  */
3081                 if (!cancel_delayed_work(&rport->fail_io_work))
3082                         fc_flush_devloss(shost);
3083                 if (!cancel_delayed_work(&rport->dev_loss_work))
3084                         fc_flush_devloss(shost);
3085
3086                 spin_lock_irqsave(shost->host_lock, flags);
3087                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3088                                   FC_RPORT_DEVLOSS_PENDING |
3089                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3090                 spin_unlock_irqrestore(shost->host_lock, flags);
3091
3092                 /* ensure any stgt delete functions are done */
3093                 fc_flush_work(shost);
3094
3095                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3096                 /* initiate a scan of the target */
3097                 spin_lock_irqsave(shost->host_lock, flags);
3098                 rport->flags |= FC_RPORT_SCAN_PENDING;
3099                 scsi_queue_work(shost, &rport->scan_work);
3100                 spin_unlock_irqrestore(shost->host_lock, flags);
3101         }
3102 }
3103 EXPORT_SYMBOL(fc_remote_port_rolechg);
3104
3105 /**
3106  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3107  * @work:       rport target that failed to reappear in the allotted time.
3108  *
3109  * Description: An attempt to delete a remote port blocks, and if it fails
3110  *              to return in the allotted time this gets called.
3111  */
3112 static void
3113 fc_timeout_deleted_rport(struct work_struct *work)
3114 {
3115         struct fc_rport *rport =
3116                 container_of(work, struct fc_rport, dev_loss_work.work);
3117         struct Scsi_Host *shost = rport_to_shost(rport);
3118         struct fc_internal *i = to_fc_internal(shost->transportt);
3119         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3120         unsigned long flags;
3121         int do_callback = 0;
3122
3123         spin_lock_irqsave(shost->host_lock, flags);
3124
3125         rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3126
3127         /*
3128          * If the port is ONLINE, then it came back. If it was a SCSI
3129          * target, validate it still is. If not, tear down the
3130          * scsi_target on it.
3131          */
3132         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3133             (rport->scsi_target_id != -1) &&
3134             !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3135                 dev_printk(KERN_ERR, &rport->dev,
3136                         "blocked FC remote port time out: no longer"
3137                         " a FCP target, removing starget\n");
3138                 spin_unlock_irqrestore(shost->host_lock, flags);
3139                 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3140                 fc_queue_work(shost, &rport->stgt_delete_work);
3141                 return;
3142         }
3143
3144         /* NOOP state - we're flushing workq's */
3145         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3146                 spin_unlock_irqrestore(shost->host_lock, flags);
3147                 dev_printk(KERN_ERR, &rport->dev,
3148                         "blocked FC remote port time out: leaving"
3149                         " rport%s alone\n",
3150                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3151                 return;
3152         }
3153
3154         if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3155             (rport->scsi_target_id == -1)) {
3156                 list_del(&rport->peers);
3157                 rport->port_state = FC_PORTSTATE_DELETED;
3158                 dev_printk(KERN_ERR, &rport->dev,
3159                         "blocked FC remote port time out: removing"
3160                         " rport%s\n",
3161                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3162                 fc_queue_work(shost, &rport->rport_delete_work);
3163                 spin_unlock_irqrestore(shost->host_lock, flags);
3164                 return;
3165         }
3166
3167         dev_printk(KERN_ERR, &rport->dev,
3168                 "blocked FC remote port time out: removing target and "
3169                 "saving binding\n");
3170
3171         list_move_tail(&rport->peers, &fc_host->rport_bindings);
3172
3173         /*
3174          * Note: We do not remove or clear the hostdata area. This allows
3175          *   host-specific target data to persist along with the
3176          *   scsi_target_id. It's up to the host to manage it's hostdata area.
3177          */
3178
3179         /*
3180          * Reinitialize port attributes that may change if the port comes back.
3181          */
3182         rport->maxframe_size = -1;
3183         rport->supported_classes = FC_COS_UNSPECIFIED;
3184         rport->roles = FC_PORT_ROLE_UNKNOWN;
3185         rport->port_state = FC_PORTSTATE_NOTPRESENT;
3186         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3187
3188         /*
3189          * Pre-emptively kill I/O rather than waiting for the work queue
3190          * item to teardown the starget. (FCOE libFC folks prefer this
3191          * and to have the rport_port_id still set when it's done).
3192          */
3193         spin_unlock_irqrestore(shost->host_lock, flags);
3194         fc_terminate_rport_io(rport);
3195
3196         spin_lock_irqsave(shost->host_lock, flags);
3197
3198         if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {     /* still missing */
3199
3200                 /* remove the identifiers that aren't used in the consisting binding */
3201                 switch (fc_host->tgtid_bind_type) {
3202                 case FC_TGTID_BIND_BY_WWPN:
3203                         rport->node_name = -1;
3204                         rport->port_id = -1;
3205                         break;
3206                 case FC_TGTID_BIND_BY_WWNN:
3207                         rport->port_name = -1;
3208                         rport->port_id = -1;
3209                         break;
3210                 case FC_TGTID_BIND_BY_ID:
3211                         rport->node_name = -1;
3212                         rport->port_name = -1;
3213                         break;
3214                 case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
3215                         break;
3216                 }
3217
3218                 /*
3219                  * As this only occurs if the remote port (scsi target)
3220                  * went away and didn't come back - we'll remove
3221                  * all attached scsi devices.
3222                  */
3223                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3224                 fc_queue_work(shost, &rport->stgt_delete_work);
3225
3226                 do_callback = 1;
3227         }
3228
3229         spin_unlock_irqrestore(shost->host_lock, flags);
3230
3231         /*
3232          * Notify the driver that the rport is now dead. The LLDD will
3233          * also guarantee that any communication to the rport is terminated
3234          *
3235          * Note: we set the CALLBK_DONE flag above to correspond
3236          */
3237         if (do_callback && i->f->dev_loss_tmo_callbk)
3238                 i->f->dev_loss_tmo_callbk(rport);
3239 }
3240
3241
3242 /**
3243  * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3244  * @work:       rport to terminate io on.
3245  *
3246  * Notes: Only requests the failure of the io, not that all are flushed
3247  *    prior to returning.
3248  */
3249 static void
3250 fc_timeout_fail_rport_io(struct work_struct *work)
3251 {
3252         struct fc_rport *rport =
3253                 container_of(work, struct fc_rport, fail_io_work.work);
3254
3255         if (rport->port_state != FC_PORTSTATE_BLOCKED)
3256                 return;
3257
3258         rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3259         fc_terminate_rport_io(rport);
3260 }
3261
3262 /**
3263  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3264  * @work:       remote port to be scanned.
3265  */
3266 static void
3267 fc_scsi_scan_rport(struct work_struct *work)
3268 {
3269         struct fc_rport *rport =
3270                 container_of(work, struct fc_rport, scan_work);
3271         struct Scsi_Host *shost = rport_to_shost(rport);
3272         struct fc_internal *i = to_fc_internal(shost->transportt);
3273         unsigned long flags;
3274
3275         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3276             (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3277             !(i->f->disable_target_scan)) {
3278                 scsi_scan_target(&rport->dev, rport->channel,
3279                         rport->scsi_target_id, SCAN_WILD_CARD, 1);
3280         }
3281
3282         spin_lock_irqsave(shost->host_lock, flags);
3283         rport->flags &= ~FC_RPORT_SCAN_PENDING;
3284         spin_unlock_irqrestore(shost->host_lock, flags);
3285 }
3286
3287 /**
3288  * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3289  * @cmnd: SCSI command that scsi_eh is trying to recover
3290  *
3291  * This routine can be called from a FC LLD scsi_eh callback. It
3292  * blocks the scsi_eh thread until the fc_rport leaves the
3293  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3294  * necessary to avoid the scsi_eh failing recovery actions for blocked
3295  * rports which would lead to offlined SCSI devices.
3296  *
3297  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3298  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3299  *          passed back to scsi_eh.
3300  */
3301 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3302 {
3303         struct Scsi_Host *shost = cmnd->device->host;
3304         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3305         unsigned long flags;
3306
3307         spin_lock_irqsave(shost->host_lock, flags);
3308         while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3309                !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3310                 spin_unlock_irqrestore(shost->host_lock, flags);
3311                 msleep(1000);
3312                 spin_lock_irqsave(shost->host_lock, flags);
3313         }
3314         spin_unlock_irqrestore(shost->host_lock, flags);
3315
3316         if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3317                 return FAST_IO_FAIL;
3318
3319         return 0;
3320 }
3321 EXPORT_SYMBOL(fc_block_scsi_eh);
3322
3323 /**
3324  * fc_vport_setup - allocates and creates a FC virtual port.
3325  * @shost:      scsi host the virtual port is connected to.
3326  * @channel:    Channel on shost port connected to.
3327  * @pdev:       parent device for vport
3328  * @ids:        The world wide names, FC4 port roles, etc for
3329  *              the virtual port.
3330  * @ret_vport:  The pointer to the created vport.
3331  *
3332  * Allocates and creates the vport structure, calls the parent host
3333  * to instantiate the vport, the completes w/ class and sysfs creation.
3334  *
3335  * Notes:
3336  *      This routine assumes no locks are held on entry.
3337  */
3338 static int
3339 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3340         struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
3341 {
3342         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3343         struct fc_internal *fci = to_fc_internal(shost->transportt);
3344         struct fc_vport *vport;
3345         struct device *dev;
3346         unsigned long flags;
3347         size_t size;
3348         int error;
3349
3350         *ret_vport = NULL;
3351
3352         if ( ! fci->f->vport_create)
3353                 return -ENOENT;
3354
3355         size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3356         vport = kzalloc(size, GFP_KERNEL);
3357         if (unlikely(!vport)) {
3358                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3359                 return -ENOMEM;
3360         }
3361
3362         vport->vport_state = FC_VPORT_UNKNOWN;
3363         vport->vport_last_state = FC_VPORT_UNKNOWN;
3364         vport->node_name = ids->node_name;
3365         vport->port_name = ids->port_name;
3366         vport->roles = ids->roles;
3367         vport->vport_type = ids->vport_type;
3368         if (fci->f->dd_fcvport_size)
3369                 vport->dd_data = &vport[1];
3370         vport->shost = shost;
3371         vport->channel = channel;
3372         vport->flags = FC_VPORT_CREATING;
3373         INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3374
3375         spin_lock_irqsave(shost->host_lock, flags);
3376
3377         if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3378                 spin_unlock_irqrestore(shost->host_lock, flags);
3379                 kfree(vport);
3380                 return -ENOSPC;
3381         }
3382         fc_host->npiv_vports_inuse++;
3383         vport->number = fc_host->next_vport_number++;
3384         list_add_tail(&vport->peers, &fc_host->vports);
3385         get_device(&shost->shost_gendev);       /* for fc_host->vport list */
3386
3387         spin_unlock_irqrestore(shost->host_lock, flags);
3388
3389         dev = &vport->dev;
3390         device_initialize(dev);                 /* takes self reference */
3391         dev->parent = get_device(pdev);         /* takes parent reference */
3392         dev->release = fc_vport_dev_release;
3393         dev_set_name(dev, "vport-%d:%d-%d",
3394                      shost->host_no, channel, vport->number);
3395         transport_setup_device(dev);
3396
3397         error = device_add(dev);
3398         if (error) {
3399                 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3400                 goto delete_vport;
3401         }
3402         transport_add_device(dev);
3403         transport_configure_device(dev);
3404
3405         error = fci->f->vport_create(vport, ids->disable);
3406         if (error) {
3407                 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3408                 goto delete_vport_all;
3409         }
3410
3411         /*
3412          * if the parent isn't the physical adapter's Scsi_Host, ensure
3413          * the Scsi_Host at least contains ia symlink to the vport.
3414          */
3415         if (pdev != &shost->shost_gendev) {
3416                 error = sysfs_create_link(&shost->shost_gendev.kobj,
3417                                  &dev->kobj, dev_name(dev));
3418                 if (error)
3419                         printk(KERN_ERR
3420                                 "%s: Cannot create vport symlinks for "
3421                                 "%s, err=%d\n",
3422                                 __func__, dev_name(dev), error);
3423         }
3424         spin_lock_irqsave(shost->host_lock, flags);
3425         vport->flags &= ~FC_VPORT_CREATING;
3426         spin_unlock_irqrestore(shost->host_lock, flags);
3427
3428         dev_printk(KERN_NOTICE, pdev,
3429                         "%s created via shost%d channel %d\n", dev_name(dev),
3430                         shost->host_no, channel);
3431
3432         *ret_vport = vport;
3433
3434         return 0;
3435
3436 delete_vport_all:
3437         transport_remove_device(dev);
3438         device_del(dev);
3439 delete_vport:
3440         transport_destroy_device(dev);
3441         spin_lock_irqsave(shost->host_lock, flags);
3442         list_del(&vport->peers);
3443         put_device(&shost->shost_gendev);       /* for fc_host->vport list */
3444         fc_host->npiv_vports_inuse--;
3445         spin_unlock_irqrestore(shost->host_lock, flags);
3446         put_device(dev->parent);
3447         kfree(vport);
3448
3449         return error;
3450 }
3451
3452 /**
3453  * fc_vport_create - Admin App or LLDD requests creation of a vport
3454  * @shost:      scsi host the virtual port is connected to.
3455  * @channel:    channel on shost port connected to.
3456  * @ids:        The world wide names, FC4 port roles, etc for
3457  *              the virtual port.
3458  *
3459  * Notes:
3460  *      This routine assumes no locks are held on entry.
3461  */
3462 struct fc_vport *
3463 fc_vport_create(struct Scsi_Host *shost, int channel,
3464         struct fc_vport_identifiers *ids)
3465 {
3466         int stat;
3467         struct fc_vport *vport;
3468
3469         stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3470                  ids, &vport);
3471         return stat ? NULL : vport;
3472 }
3473 EXPORT_SYMBOL(fc_vport_create);
3474
3475 /**
3476  * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3477  * @vport:      fc_vport to be terminated
3478  *
3479  * Calls the LLDD vport_delete() function, then deallocates and removes
3480  * the vport from the shost and object tree.
3481  *
3482  * Notes:
3483  *      This routine assumes no locks are held on entry.
3484  */
3485 int
3486 fc_vport_terminate(struct fc_vport *vport)
3487 {
3488         struct Scsi_Host *shost = vport_to_shost(vport);
3489         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3490         struct fc_internal *i = to_fc_internal(shost->transportt);
3491         struct device *dev = &vport->dev;
3492         unsigned long flags;
3493         int stat;
3494
3495         if (i->f->vport_delete)
3496                 stat = i->f->vport_delete(vport);
3497         else
3498                 stat = -ENOENT;
3499
3500         spin_lock_irqsave(shost->host_lock, flags);
3501         vport->flags &= ~FC_VPORT_DELETING;
3502         if (!stat) {
3503                 vport->flags |= FC_VPORT_DELETED;
3504                 list_del(&vport->peers);
3505                 fc_host->npiv_vports_inuse--;
3506                 put_device(&shost->shost_gendev);  /* for fc_host->vport list */
3507         }
3508         spin_unlock_irqrestore(shost->host_lock, flags);
3509
3510         if (stat)
3511                 return stat;
3512
3513         if (dev->parent != &shost->shost_gendev)
3514                 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3515         transport_remove_device(dev);
3516         device_del(dev);
3517         transport_destroy_device(dev);
3518
3519         /*
3520          * Removing our self-reference should mean our
3521          * release function gets called, which will drop the remaining
3522          * parent reference and free the data structure.
3523          */
3524         put_device(dev);                        /* for self-reference */
3525
3526         return 0; /* SUCCESS */
3527 }
3528 EXPORT_SYMBOL(fc_vport_terminate);
3529
3530 /**
3531  * fc_vport_sched_delete - workq-based delete request for a vport
3532  * @work:       vport to be deleted.
3533  */
3534 static void
3535 fc_vport_sched_delete(struct work_struct *work)
3536 {
3537         struct fc_vport *vport =
3538                 container_of(work, struct fc_vport, vport_delete_work);
3539         int stat;
3540
3541         stat = fc_vport_terminate(vport);
3542         if (stat)
3543                 dev_printk(KERN_ERR, vport->dev.parent,
3544                         "%s: %s could not be deleted created via "
3545                         "shost%d channel %d - error %d\n", __func__,
3546                         dev_name(&vport->dev), vport->shost->host_no,
3547                         vport->channel, stat);
3548 }
3549
3550
3551 /*
3552  * BSG support
3553  */
3554
3555
3556 /**
3557  * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3558  * @job:        fc_bsg_job that is to be torn down
3559  */
3560 static void
3561 fc_destroy_bsgjob(struct fc_bsg_job *job)
3562 {
3563         unsigned long flags;
3564
3565         spin_lock_irqsave(&job->job_lock, flags);
3566         if (job->ref_cnt) {
3567                 spin_unlock_irqrestore(&job->job_lock, flags);
3568                 return;
3569         }
3570         spin_unlock_irqrestore(&job->job_lock, flags);
3571
3572         put_device(job->dev);   /* release reference for the request */
3573
3574         kfree(job->request_payload.sg_list);
3575         kfree(job->reply_payload.sg_list);
3576         kfree(job);
3577 }
3578
3579 /**
3580  * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3581  *                  completed
3582  * @job:        fc_bsg_job that is complete
3583  */
3584 static void
3585 fc_bsg_jobdone(struct fc_bsg_job *job)
3586 {
3587         struct request *req = job->req;
3588         struct request *rsp = req->next_rq;
3589         int err;
3590
3591         err = job->req->errors = job->reply->result;
3592
3593         if (err < 0)
3594                 /* we're only returning the result field in the reply */
3595                 job->req->sense_len = sizeof(uint32_t);
3596         else
3597                 job->req->sense_len = job->reply_len;
3598
3599         /* we assume all request payload was transferred, residual == 0 */
3600         req->resid_len = 0;
3601
3602         if (rsp) {
3603                 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3604
3605                 /* set reply (bidi) residual */
3606                 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3607                                       rsp->resid_len);
3608         }
3609         blk_complete_request(req);
3610 }
3611
3612 /**
3613  * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3614  * @rq:        BSG request that holds the job to be destroyed
3615  */
3616 static void fc_bsg_softirq_done(struct request *rq)
3617 {
3618         struct fc_bsg_job *job = rq->special;
3619         unsigned long flags;
3620
3621         spin_lock_irqsave(&job->job_lock, flags);
3622         job->state_flags |= FC_RQST_STATE_DONE;
3623         job->ref_cnt--;
3624         spin_unlock_irqrestore(&job->job_lock, flags);
3625
3626         blk_end_request_all(rq, rq->errors);
3627         fc_destroy_bsgjob(job);
3628 }
3629
3630 /**
3631  * fc_bsg_job_timeout - handler for when a bsg request timesout
3632  * @req:        request that timed out
3633  */
3634 static enum blk_eh_timer_return
3635 fc_bsg_job_timeout(struct request *req)
3636 {
3637         struct fc_bsg_job *job = (void *) req->special;
3638         struct Scsi_Host *shost = job->shost;
3639         struct fc_internal *i = to_fc_internal(shost->transportt);
3640         unsigned long flags;
3641         int err = 0, done = 0;
3642
3643         if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3644                 return BLK_EH_RESET_TIMER;
3645
3646         spin_lock_irqsave(&job->job_lock, flags);
3647         if (job->state_flags & FC_RQST_STATE_DONE)
3648                 done = 1;
3649         else
3650                 job->ref_cnt++;
3651         spin_unlock_irqrestore(&job->job_lock, flags);
3652
3653         if (!done && i->f->bsg_timeout) {
3654                 /* call LLDD to abort the i/o as it has timed out */
3655                 err = i->f->bsg_timeout(job);
3656                 if (err == -EAGAIN) {
3657                         job->ref_cnt--;
3658                         return BLK_EH_RESET_TIMER;
3659                 } else if (err)
3660                         printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3661                                 "abort failed with status %d\n", err);
3662         }
3663
3664         /* the blk_end_sync_io() doesn't check the error */
3665         if (done)
3666                 return BLK_EH_NOT_HANDLED;
3667         else
3668                 return BLK_EH_HANDLED;
3669 }
3670
3671 static int
3672 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3673 {
3674         size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3675
3676         BUG_ON(!req->nr_phys_segments);
3677
3678         buf->sg_list = kzalloc(sz, GFP_KERNEL);
3679         if (!buf->sg_list)
3680                 return -ENOMEM;
3681         sg_init_table(buf->sg_list, req->nr_phys_segments);
3682         buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3683         buf->payload_len = blk_rq_bytes(req);
3684         return 0;
3685 }
3686
3687
3688 /**
3689  * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3690  *                   bsg request
3691  * @shost:      SCSI Host corresponding to the bsg object
3692  * @rport:      (optional) FC Remote Port corresponding to the bsg object
3693  * @req:        BSG request that needs a job structure
3694  */
3695 static int
3696 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3697         struct request *req)
3698 {
3699         struct fc_internal *i = to_fc_internal(shost->transportt);
3700         struct request *rsp = req->next_rq;
3701         struct fc_bsg_job *job;
3702         int ret;
3703
3704         BUG_ON(req->special);
3705
3706         job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3707                         GFP_KERNEL);
3708         if (!job)
3709                 return -ENOMEM;
3710
3711         /*
3712          * Note: this is a bit silly.
3713          * The request gets formatted as a SGIO v4 ioctl request, which
3714          * then gets reformatted as a blk request, which then gets
3715          * reformatted as a fc bsg request. And on completion, we have
3716          * to wrap return results such that SGIO v4 thinks it was a scsi
3717          * status.  I hope this was all worth it.
3718          */
3719
3720         req->special = job;
3721         job->shost = shost;
3722         job->rport = rport;
3723         job->req = req;
3724         if (i->f->dd_bsg_size)
3725                 job->dd_data = (void *)&job[1];
3726         spin_lock_init(&job->job_lock);
3727         job->request = (struct fc_bsg_request *)req->cmd;
3728         job->request_len = req->cmd_len;
3729         job->reply = req->sense;
3730         job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3731                                                  * allocated */
3732         if (req->bio) {
3733                 ret = fc_bsg_map_buffer(&job->request_payload, req);
3734                 if (ret)
3735                         goto failjob_rls_job;
3736         }
3737         if (rsp && rsp->bio) {
3738                 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3739                 if (ret)
3740                         goto failjob_rls_rqst_payload;
3741         }
3742         job->job_done = fc_bsg_jobdone;
3743         if (rport)
3744                 job->dev = &rport->dev;
3745         else
3746                 job->dev = &shost->shost_gendev;
3747         get_device(job->dev);           /* take a reference for the request */
3748
3749         job->ref_cnt = 1;
3750
3751         return 0;
3752
3753
3754 failjob_rls_rqst_payload:
3755         kfree(job->request_payload.sg_list);
3756 failjob_rls_job:
3757         kfree(job);
3758         return -ENOMEM;
3759 }
3760
3761
3762 enum fc_dispatch_result {
3763         FC_DISPATCH_BREAK,      /* on return, q is locked, break from q loop */
3764         FC_DISPATCH_LOCKED,     /* on return, q is locked, continue on */
3765         FC_DISPATCH_UNLOCKED,   /* on return, q is unlocked, continue on */
3766 };
3767
3768
3769 /**
3770  * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3771  * @q:          fc host request queue
3772  * @shost:      scsi host rport attached to
3773  * @job:        bsg job to be processed
3774  */
3775 static enum fc_dispatch_result
3776 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3777                          struct fc_bsg_job *job)
3778 {
3779         struct fc_internal *i = to_fc_internal(shost->transportt);
3780         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3781         int ret;
3782
3783         /* Validate the host command */
3784         switch (job->request->msgcode) {
3785         case FC_BSG_HST_ADD_RPORT:
3786                 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3787                 break;
3788
3789         case FC_BSG_HST_DEL_RPORT:
3790                 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3791                 break;
3792
3793         case FC_BSG_HST_ELS_NOLOGIN:
3794                 cmdlen += sizeof(struct fc_bsg_host_els);
3795                 /* there better be a xmt and rcv payloads */
3796                 if ((!job->request_payload.payload_len) ||
3797                     (!job->reply_payload.payload_len)) {
3798                         ret = -EINVAL;
3799                         goto fail_host_msg;
3800                 }
3801                 break;
3802
3803         case FC_BSG_HST_CT:
3804                 cmdlen += sizeof(struct fc_bsg_host_ct);
3805                 /* there better be xmt and rcv payloads */
3806                 if ((!job->request_payload.payload_len) ||
3807                     (!job->reply_payload.payload_len)) {
3808                         ret = -EINVAL;
3809                         goto fail_host_msg;
3810                 }
3811                 break;
3812
3813         case FC_BSG_HST_VENDOR:
3814                 cmdlen += sizeof(struct fc_bsg_host_vendor);
3815                 if ((shost->hostt->vendor_id == 0L) ||
3816                     (job->request->rqst_data.h_vendor.vendor_id !=
3817                         shost->hostt->vendor_id)) {
3818                         ret = -ESRCH;
3819                         goto fail_host_msg;
3820                 }
3821                 break;
3822
3823         default:
3824                 ret = -EBADR;
3825                 goto fail_host_msg;
3826         }
3827
3828         /* check if we really have all the request data needed */
3829         if (job->request_len < cmdlen) {
3830                 ret = -ENOMSG;
3831                 goto fail_host_msg;
3832         }
3833
3834         ret = i->f->bsg_request(job);
3835         if (!ret)
3836                 return FC_DISPATCH_UNLOCKED;
3837
3838 fail_host_msg:
3839         /* return the errno failure code as the only status */
3840         BUG_ON(job->reply_len < sizeof(uint32_t));
3841         job->reply->reply_payload_rcv_len = 0;
3842         job->reply->result = ret;
3843         job->reply_len = sizeof(uint32_t);
3844         fc_bsg_jobdone(job);
3845         return FC_DISPATCH_UNLOCKED;
3846 }
3847
3848
3849 /*
3850  * fc_bsg_goose_queue - restart rport queue in case it was stopped
3851  * @rport:      rport to be restarted
3852  */
3853 static void
3854 fc_bsg_goose_queue(struct fc_rport *rport)
3855 {
3856         if (!rport->rqst_q)
3857                 return;
3858
3859         /*
3860          * This get/put dance makes no sense
3861          */
3862         get_device(&rport->dev);
3863         blk_run_queue_async(rport->rqst_q);
3864         put_device(&rport->dev);
3865 }
3866
3867 /**
3868  * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3869  * @q:          rport request queue
3870  * @shost:      scsi host rport attached to
3871  * @rport:      rport request destined to
3872  * @job:        bsg job to be processed
3873  */
3874 static enum fc_dispatch_result
3875 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3876                          struct fc_rport *rport, struct fc_bsg_job *job)
3877 {
3878         struct fc_internal *i = to_fc_internal(shost->transportt);
3879         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3880         int ret;
3881
3882         /* Validate the rport command */
3883         switch (job->request->msgcode) {
3884         case FC_BSG_RPT_ELS:
3885                 cmdlen += sizeof(struct fc_bsg_rport_els);
3886                 goto check_bidi;
3887
3888         case FC_BSG_RPT_CT:
3889                 cmdlen += sizeof(struct fc_bsg_rport_ct);
3890 check_bidi:
3891                 /* there better be xmt and rcv payloads */
3892                 if ((!job->request_payload.payload_len) ||
3893                     (!job->reply_payload.payload_len)) {
3894                         ret = -EINVAL;
3895                         goto fail_rport_msg;
3896                 }
3897                 break;
3898         default:
3899                 ret = -EBADR;
3900                 goto fail_rport_msg;
3901         }
3902
3903         /* check if we really have all the request data needed */
3904         if (job->request_len < cmdlen) {
3905                 ret = -ENOMSG;
3906                 goto fail_rport_msg;
3907         }
3908
3909         ret = i->f->bsg_request(job);
3910         if (!ret)
3911                 return FC_DISPATCH_UNLOCKED;
3912
3913 fail_rport_msg:
3914         /* return the errno failure code as the only status */
3915         BUG_ON(job->reply_len < sizeof(uint32_t));
3916         job->reply->reply_payload_rcv_len = 0;
3917         job->reply->result = ret;
3918         job->reply_len = sizeof(uint32_t);
3919         fc_bsg_jobdone(job);
3920         return FC_DISPATCH_UNLOCKED;
3921 }
3922
3923
3924 /**
3925  * fc_bsg_request_handler - generic handler for bsg requests
3926  * @q:          request queue to manage
3927  * @shost:      Scsi_Host related to the bsg object
3928  * @rport:      FC remote port related to the bsg object (optional)
3929  * @dev:        device structure for bsg object
3930  */
3931 static void
3932 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3933                        struct fc_rport *rport, struct device *dev)
3934 {
3935         struct request *req;
3936         struct fc_bsg_job *job;
3937         enum fc_dispatch_result ret;
3938
3939         if (!get_device(dev))
3940                 return;
3941
3942         while (1) {
3943                 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3944                     !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3945                         break;
3946
3947                 req = blk_fetch_request(q);
3948                 if (!req)
3949                         break;
3950
3951                 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3952                         req->errors = -ENXIO;
3953                         spin_unlock_irq(q->queue_lock);
3954                         blk_end_request_all(req, -ENXIO);
3955                         spin_lock_irq(q->queue_lock);
3956                         continue;
3957                 }
3958
3959                 spin_unlock_irq(q->queue_lock);
3960
3961                 ret = fc_req_to_bsgjob(shost, rport, req);
3962                 if (ret) {
3963                         req->errors = ret;
3964                         blk_end_request_all(req, ret);
3965                         spin_lock_irq(q->queue_lock);
3966                         continue;
3967                 }
3968
3969                 job = req->special;
3970
3971                 /* check if we have the msgcode value at least */
3972                 if (job->request_len < sizeof(uint32_t)) {
3973                         BUG_ON(job->reply_len < sizeof(uint32_t));
3974                         job->reply->reply_payload_rcv_len = 0;
3975                         job->reply->result = -ENOMSG;
3976                         job->reply_len = sizeof(uint32_t);
3977                         fc_bsg_jobdone(job);
3978                         spin_lock_irq(q->queue_lock);
3979                         continue;
3980                 }
3981
3982                 /* the dispatch routines will unlock the queue_lock */
3983                 if (rport)
3984                         ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3985                 else
3986                         ret = fc_bsg_host_dispatch(q, shost, job);
3987
3988                 /* did dispatcher hit state that can't process any more */
3989                 if (ret == FC_DISPATCH_BREAK)
3990                         break;
3991
3992                 /* did dispatcher had released the lock */
3993                 if (ret == FC_DISPATCH_UNLOCKED)
3994                         spin_lock_irq(q->queue_lock);
3995         }
3996
3997         spin_unlock_irq(q->queue_lock);
3998         put_device(dev);
3999         spin_lock_irq(q->queue_lock);
4000 }
4001
4002
4003 /**
4004  * fc_bsg_host_handler - handler for bsg requests for a fc host
4005  * @q:          fc host request queue
4006  */
4007 static void
4008 fc_bsg_host_handler(struct request_queue *q)
4009 {
4010         struct Scsi_Host *shost = q->queuedata;
4011
4012         fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
4013 }
4014
4015
4016 /**
4017  * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4018  * @q:          rport request queue
4019  */
4020 static void
4021 fc_bsg_rport_handler(struct request_queue *q)
4022 {
4023         struct fc_rport *rport = q->queuedata;
4024         struct Scsi_Host *shost = rport_to_shost(rport);
4025
4026         fc_bsg_request_handler(q, shost, rport, &rport->dev);
4027 }
4028
4029
4030 /**
4031  * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4032  * @shost:      shost for fc_host
4033  * @fc_host:    fc_host adding the structures to
4034  */
4035 static int
4036 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4037 {
4038         struct device *dev = &shost->shost_gendev;
4039         struct fc_internal *i = to_fc_internal(shost->transportt);
4040         struct request_queue *q;
4041         int err;
4042         char bsg_name[20];
4043
4044         fc_host->rqst_q = NULL;
4045
4046         if (!i->f->bsg_request)
4047                 return -ENOTSUPP;
4048
4049         snprintf(bsg_name, sizeof(bsg_name),
4050                  "fc_host%d", shost->host_no);
4051
4052         q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4053         if (!q) {
4054                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4055                                 "initialize - no request queue\n",
4056                                  shost->host_no);
4057                 return -ENOMEM;
4058         }
4059
4060         q->queuedata = shost;
4061         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4062         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4063         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4064         blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4065
4066         err = bsg_register_queue(q, dev, bsg_name, NULL);
4067         if (err) {
4068                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4069                                 "initialize - register queue\n",
4070                                 shost->host_no);
4071                 blk_cleanup_queue(q);
4072                 return err;
4073         }
4074
4075         fc_host->rqst_q = q;
4076         return 0;
4077 }
4078
4079
4080 /**
4081  * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4082  * @shost:      shost that rport is attached to
4083  * @rport:      rport that the bsg hooks are being attached to
4084  */
4085 static int
4086 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4087 {
4088         struct device *dev = &rport->dev;
4089         struct fc_internal *i = to_fc_internal(shost->transportt);
4090         struct request_queue *q;
4091         int err;
4092
4093         rport->rqst_q = NULL;
4094
4095         if (!i->f->bsg_request)
4096                 return -ENOTSUPP;
4097
4098         q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4099         if (!q) {
4100                 printk(KERN_ERR "%s: bsg interface failed to "
4101                                 "initialize - no request queue\n",
4102                                  dev->kobj.name);
4103                 return -ENOMEM;
4104         }
4105
4106         q->queuedata = rport;
4107         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4108         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4109         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4110         blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4111
4112         err = bsg_register_queue(q, dev, NULL, NULL);
4113         if (err) {
4114                 printk(KERN_ERR "%s: bsg interface failed to "
4115                                 "initialize - register queue\n",
4116                                  dev->kobj.name);
4117                 blk_cleanup_queue(q);
4118                 return err;
4119         }
4120
4121         rport->rqst_q = q;
4122         return 0;
4123 }
4124
4125
4126 /**
4127  * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4128  * @q:  the request_queue that is to be torn down.
4129  *
4130  * Notes:
4131  *   Before unregistering the queue empty any requests that are blocked
4132  *
4133  *
4134  */
4135 static void
4136 fc_bsg_remove(struct request_queue *q)
4137 {
4138         if (q) {
4139                 bsg_unregister_queue(q);
4140                 blk_cleanup_queue(q);
4141         }
4142 }
4143
4144
4145 /* Original Author:  Martin Hicks */
4146 MODULE_AUTHOR("James Smart");
4147 MODULE_DESCRIPTION("FC Transport Attributes");
4148 MODULE_LICENSE("GPL");
4149
4150 module_init(fc_transport_init);
4151 module_exit(fc_transport_exit);