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_25GBIT,          "25 Gbit" },
 269         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
 270 };
 271 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 272
 273
 274 static int
 275 show_fc_fc4s (char *buf, u8 *fc4_list)
 276 {
 277         int i, len=0;
 278
 279         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 280                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 281         len += sprintf(buf + len, "\n");
 282         return len;
 283 }
 284
 285
 286 /* Convert FC_PORT_ROLE bit values to ascii string name */
 287 static const struct {
 288         u32                     value;
 289         char                    *name;
 290 } fc_port_role_names[] = {
 291         { FC_PORT_ROLE_FCP_TARGET,      "FCP Target" },
 292         { FC_PORT_ROLE_FCP_INITIATOR,   "FCP Initiator" },
 293         { FC_PORT_ROLE_IP_PORT,         "IP Port" },
 294 };
 295 fc_bitfield_name_search(port_roles, fc_port_role_names)
 296
 297 /*
 298  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 299  */
 300 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 301 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 302 #define FC_FPORT_PORTID                 0x00000e
 303 #define FC_FABCTLR_PORTID               0x00000d
 304 #define FC_DIRSRVR_PORTID               0x00000c
 305 #define FC_TIMESRVR_PORTID              0x00000b
 306 #define FC_MGMTSRVR_PORTID              0x00000a
 307
 308
 309 static void fc_timeout_deleted_rport(struct work_struct *work);
 310 static void fc_timeout_fail_rport_io(struct work_struct *work);
 311 static void fc_scsi_scan_rport(struct work_struct *work);
 312
 313 /*
 314  * Attribute counts pre object type...
 315  * Increase these values if you add attributes
 316  */
 317 #define FC_STARGET_NUM_ATTRS    3
 318 #define FC_RPORT_NUM_ATTRS      10
 319 #define FC_VPORT_NUM_ATTRS      9
 320 #define FC_HOST_NUM_ATTRS       29
 321
 322 struct fc_internal {
 323         struct scsi_transport_template t;
 324         struct fc_function_template *f;
 325
 326         /*
 327          * For attributes : each object has :
 328          *   An array of the actual attributes structures
 329          *   An array of null-terminated pointers to the attribute
 330          *     structures - used for mid-layer interaction.
 331          *
 332          * The attribute containers for the starget and host are are
 333          * part of the midlayer. As the remote port is specific to the
 334          * fc transport, we must provide the attribute container.
 335          */
 336         struct device_attribute private_starget_attrs[
 337                                                         FC_STARGET_NUM_ATTRS];
 338         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 339
 340         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 341         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 342
 343         struct transport_container rport_attr_cont;
 344         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 345         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 346
 347         struct transport_container vport_attr_cont;
 348         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
 349         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
 350 };
 351
 352 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 353
 354 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 355                            struct device *cdev)
 356 {
 357         struct scsi_target *starget = to_scsi_target(dev);
 358         struct fc_rport *rport = starget_to_rport(starget);
 359
 360         /*
 361          * if parent is remote port, use values from remote port.
 362          * Otherwise, this host uses the fc_transport, but not the
 363          * remote port interface. As such, initialize to known non-values.
 364          */
 365         if (rport) {
 366                 fc_starget_node_name(starget) = rport->node_name;
 367                 fc_starget_port_name(starget) = rport->port_name;
 368                 fc_starget_port_id(starget) = rport->port_id;
 369         } else {
 370                 fc_starget_node_name(starget) = -1;
 371                 fc_starget_port_name(starget) = -1;
 372                 fc_starget_port_id(starget) = -1;
 373         }
 374
 375         return 0;
 376 }
 377
 378 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 379                                "fc_transport",
 380                                fc_target_setup,
 381                                NULL,
 382                                NULL);
 383
 384 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 385                          struct device *cdev)
 386 {
 387         struct Scsi_Host *shost = dev_to_shost(dev);
 388         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 389
 390         /*
 391          * Set default values easily detected by the midlayer as
 392          * failure cases.  The scsi lldd is responsible for initializing
 393          * all transport attributes to valid values per host.
 394          */
 395         fc_host->node_name = -1;
 396         fc_host->port_name = -1;
 397         fc_host->permanent_port_name = -1;
 398         fc_host->supported_classes = FC_COS_UNSPECIFIED;
 399         memset(fc_host->supported_fc4s, 0,
 400                 sizeof(fc_host->supported_fc4s));
 401         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
 402         fc_host->maxframe_size = -1;
 403         fc_host->max_npiv_vports = 0;
 404         memset(fc_host->serial_number, 0,
 405                 sizeof(fc_host->serial_number));
 406         memset(fc_host->manufacturer, 0,
 407                 sizeof(fc_host->manufacturer));
 408         memset(fc_host->model, 0,
 409                 sizeof(fc_host->model));
 410         memset(fc_host->model_description, 0,
 411                 sizeof(fc_host->model_description));
 412         memset(fc_host->hardware_version, 0,
 413                 sizeof(fc_host->hardware_version));
 414         memset(fc_host->driver_version, 0,
 415                 sizeof(fc_host->driver_version));
 416         memset(fc_host->firmware_version, 0,
 417                 sizeof(fc_host->firmware_version));
 418         memset(fc_host->optionrom_version, 0,
 419                 sizeof(fc_host->optionrom_version));
 420
 421         fc_host->port_id = -1;
 422         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
 423         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
 424         memset(fc_host->active_fc4s, 0,
 425                 sizeof(fc_host->active_fc4s));
 426         fc_host->speed = FC_PORTSPEED_UNKNOWN;
 427         fc_host->fabric_name = -1;
 428         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
 429         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
 430
 431         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
 432
 433         INIT_LIST_HEAD(&fc_host->rports);
 434         INIT_LIST_HEAD(&fc_host->rport_bindings);
 435         INIT_LIST_HEAD(&fc_host->vports);
 436         fc_host->next_rport_number = 0;
 437         fc_host->next_target_id = 0;
 438         fc_host->next_vport_number = 0;
 439         fc_host->npiv_vports_inuse = 0;
 440
 441         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
 442                  "fc_wq_%d", shost->host_no);
 443         fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
 444         if (!fc_host->work_q)
 445                 return -ENOMEM;
 446
 447         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
 448         snprintf(fc_host->devloss_work_q_name,
 449                  sizeof(fc_host->devloss_work_q_name),
 450                  "fc_dl_%d", shost->host_no);
 451         fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
 452                                         fc_host->devloss_work_q_name);
 453         if (!fc_host->devloss_work_q) {
 454                 destroy_workqueue(fc_host->work_q);
 455                 fc_host->work_q = NULL;
 456                 return -ENOMEM;
 457         }
 458
 459         fc_bsg_hostadd(shost, fc_host);
 460         /* ignore any bsg add error - we just can't do sgio */
 461
 462         return 0;
 463 }
 464
 465 static int fc_host_remove(struct transport_container *tc, struct device *dev,
 466                          struct device *cdev)
 467 {
 468         struct Scsi_Host *shost = dev_to_shost(dev);
 469         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 470
 471         fc_bsg_remove(fc_host->rqst_q);
 472         return 0;
 473 }
 474
 475 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 476                                "fc_host",
 477                                fc_host_setup,
 478                                fc_host_remove,
 479                                NULL);
 480
 481 /*
 482  * Setup and Remove actions for remote ports are handled
 483  * in the service functions below.
 484  */
 485 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 486                                "fc_remote_ports",
 487                                NULL,
 488                                NULL,
 489                                NULL);
 490
 491 /*
 492  * Setup and Remove actions for virtual ports are handled
 493  * in the service functions below.
 494  */
 495 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
 496                                "fc_vports",
 497                                NULL,
 498                                NULL,
 499                                NULL);
 500
 501 /*
 502  * Netlink Infrastructure
 503  */
 504
 505 static atomic_t fc_event_seq;
 506
 507 /**
 508  * fc_get_event_number - Obtain the next sequential FC event number
 509  *
 510  * Notes:
 511  *   We could have inlined this, but it would have required fc_event_seq to
 512  *   be exposed. For now, live with the subroutine call.
 513  *   Atomic used to avoid lock/unlock...
 514  */
 515 u32
 516 fc_get_event_number(void)
 517 {
 518         return atomic_add_return(1, &fc_event_seq);
 519 }
 520 EXPORT_SYMBOL(fc_get_event_number);
 521
 522
 523 /**
 524  * fc_host_post_event - called to post an even on an fc_host.
 525  * @shost:              host the event occurred on
 526  * @event_number:       fc event number obtained from get_fc_event_number()
 527  * @event_code:         fc_host event being posted
 528  * @event_data:         32bits of data for the event being posted
 529  *
 530  * Notes:
 531  *      This routine assumes no locks are held on entry.
 532  */
 533 void
 534 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 535                 enum fc_host_event_code event_code, u32 event_data)
 536 {
 537         struct sk_buff *skb;
 538         struct nlmsghdr *nlh;
 539         struct fc_nl_event *event;
 540         const char *name;
 541         u32 len;
 542         int err;
 543
 544         if (!scsi_nl_sock) {
 545                 err = -ENOENT;
 546                 goto send_fail;
 547         }
 548
 549         len = FC_NL_MSGALIGN(sizeof(*event));
 550
 551         skb = nlmsg_new(len, GFP_KERNEL);
 552         if (!skb) {
 553                 err = -ENOBUFS;
 554                 goto send_fail;
 555         }
 556
 557         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 558         if (!nlh) {
 559                 err = -ENOBUFS;
 560                 goto send_fail_skb;
 561         }
 562         event = nlmsg_data(nlh);
 563
 564         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 565                                 FC_NL_ASYNC_EVENT, len);
 566         event->seconds = get_seconds();
 567         event->vendor_id = 0;
 568         event->host_no = shost->host_no;
 569         event->event_datalen = sizeof(u32);     /* bytes */
 570         event->event_num = event_number;
 571         event->event_code = event_code;
 572         event->event_data = event_data;
 573
 574         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 575                         GFP_KERNEL);
 576         return;
 577
 578 send_fail_skb:
 579         kfree_skb(skb);
 580 send_fail:
 581         name = get_fc_host_event_code_name(event_code);
 582         printk(KERN_WARNING
 583                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
 584                 __func__, shost->host_no,
 585                 (name) ? name : "<unknown>", event_data, err);
 586         return;
 587 }
 588 EXPORT_SYMBOL(fc_host_post_event);
 589
 590
 591 /**
 592  * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
 593  * @shost:              host the event occurred on
 594  * @event_number:       fc event number obtained from get_fc_event_number()
 595  * @data_len:           amount, in bytes, of vendor unique data
 596  * @data_buf:           pointer to vendor unique data
 597  * @vendor_id:          Vendor id
 598  *
 599  * Notes:
 600  *      This routine assumes no locks are held on entry.
 601  */
 602 void
 603 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 604                 u32 data_len, char * data_buf, u64 vendor_id)
 605 {
 606         struct sk_buff *skb;
 607         struct nlmsghdr *nlh;
 608         struct fc_nl_event *event;
 609         u32 len;
 610         int err;
 611
 612         if (!scsi_nl_sock) {
 613                 err = -ENOENT;
 614                 goto send_vendor_fail;
 615         }
 616
 617         len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
 618
 619         skb = nlmsg_new(len, GFP_KERNEL);
 620         if (!skb) {
 621                 err = -ENOBUFS;
 622                 goto send_vendor_fail;
 623         }
 624
 625         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 626         if (!nlh) {
 627                 err = -ENOBUFS;
 628                 goto send_vendor_fail_skb;
 629         }
 630         event = nlmsg_data(nlh);
 631
 632         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 633                                 FC_NL_ASYNC_EVENT, len);
 634         event->seconds = get_seconds();
 635         event->vendor_id = vendor_id;
 636         event->host_no = shost->host_no;
 637         event->event_datalen = data_len;        /* bytes */
 638         event->event_num = event_number;
 639         event->event_code = FCH_EVT_VENDOR_UNIQUE;
 640         memcpy(&event->event_data, data_buf, data_len);
 641
 642         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 643                         GFP_KERNEL);
 644         return;
 645
 646 send_vendor_fail_skb:
 647         kfree_skb(skb);
 648 send_vendor_fail:
 649         printk(KERN_WARNING
 650                 "%s: Dropped Event : host %d vendor_unique - err %d\n",
 651                 __func__, shost->host_no, err);
 652         return;
 653 }
 654 EXPORT_SYMBOL(fc_host_post_vendor_event);
 655
 656
 657
 658 static __init int fc_transport_init(void)
 659 {
 660         int error;
 661
 662         atomic_set(&fc_event_seq, 0);
 663
 664         error = transport_class_register(&fc_host_class);
 665         if (error)
 666                 return error;
 667         error = transport_class_register(&fc_vport_class);
 668         if (error)
 669                 goto unreg_host_class;
 670         error = transport_class_register(&fc_rport_class);
 671         if (error)
 672                 goto unreg_vport_class;
 673         error = transport_class_register(&fc_transport_class);
 674         if (error)
 675                 goto unreg_rport_class;
 676         return 0;
 677
 678 unreg_rport_class:
 679         transport_class_unregister(&fc_rport_class);
 680 unreg_vport_class:
 681         transport_class_unregister(&fc_vport_class);
 682 unreg_host_class:
 683         transport_class_unregister(&fc_host_class);
 684         return error;
 685 }
 686
 687 static void __exit fc_transport_exit(void)
 688 {
 689         transport_class_unregister(&fc_transport_class);
 690         transport_class_unregister(&fc_rport_class);
 691         transport_class_unregister(&fc_host_class);
 692         transport_class_unregister(&fc_vport_class);
 693 }
 694
 695 /*
 696  * FC Remote Port Attribute Management
 697  */
 698
 699 #define fc_rport_show_function(field, format_string, sz, cast)          \
 700 static ssize_t                                                          \
 701 show_fc_rport_##field (struct device *dev,                              \
 702                        struct device_attribute *attr, char *buf)        \
 703 {                                                                       \
 704         struct fc_rport *rport = transport_class_to_rport(dev);         \
 705         struct Scsi_Host *shost = rport_to_shost(rport);                \
 706         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 707         if ((i->f->get_rport_##field) &&                                \
 708             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 709               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 710               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 711                 i->f->get_rport_##field(rport);                         \
 712         return snprintf(buf, sz, format_string, cast rport->field);     \
 713 }
 714
 715 #define fc_rport_store_function(field)                                  \
 716 static ssize_t                                                          \
 717 store_fc_rport_##field(struct device *dev,                              \
 718                        struct device_attribute *attr,                   \
 719                        const char *buf, size_t count)                   \
 720 {                                                                       \
 721         int val;                                                        \
 722         struct fc_rport *rport = transport_class_to_rport(dev);         \
 723         struct Scsi_Host *shost = rport_to_shost(rport);                \
 724         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 725         char *cp;                                                       \
 726         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
 727             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
 728             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
 729                 return -EBUSY;                                          \
 730         val = simple_strtoul(buf, &cp, 0);                              \
 731         if (*cp && (*cp != '\n'))                                       \
 732                 return -EINVAL;                                         \
 733         i->f->set_rport_##field(rport, val);                            \
 734         return count;                                                   \
 735 }
 736
 737 #define fc_rport_rd_attr(field, format_string, sz)                      \
 738         fc_rport_show_function(field, format_string, sz, )              \
 739 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 740                          show_fc_rport_##field, NULL)
 741
 742 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
 743         fc_rport_show_function(field, format_string, sz, (cast))        \
 744 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 745                           show_fc_rport_##field, NULL)
 746
 747 #define fc_rport_rw_attr(field, format_string, sz)                      \
 748         fc_rport_show_function(field, format_string, sz, )              \
 749         fc_rport_store_function(field)                                  \
 750 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
 751                         show_fc_rport_##field,                          \
 752                         store_fc_rport_##field)
 753
 754
 755 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
 756 static ssize_t                                                          \
 757 show_fc_rport_##field (struct device *dev,                              \
 758                        struct device_attribute *attr, char *buf)        \
 759 {                                                                       \
 760         struct fc_rport *rport = transport_class_to_rport(dev);         \
 761         return snprintf(buf, sz, format_string, cast rport->field);     \
 762 }
 763
 764 #define fc_private_rport_rd_attr(field, format_string, sz)              \
 765         fc_private_rport_show_function(field, format_string, sz, )      \
 766 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 767                          show_fc_rport_##field, NULL)
 768
 769 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
 770         fc_private_rport_show_function(field, format_string, sz, (cast)) \
 771 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 772                           show_fc_rport_##field, NULL)
 773
 774
 775 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
 776 static ssize_t                                                          \
 777 show_fc_rport_##title (struct device *dev,                              \
 778                        struct device_attribute *attr, char *buf)        \
 779 {                                                                       \
 780         struct fc_rport *rport = transport_class_to_rport(dev);         \
 781         const char *name;                                               \
 782         name = get_fc_##title##_name(rport->title);                     \
 783         if (!name)                                                      \
 784                 return -EINVAL;                                         \
 785         return snprintf(buf, maxlen, "%s\n", name);                     \
 786 }                                                                       \
 787 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
 788                         show_fc_rport_##title, NULL)
 789
 790
 791 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
 792         i->private_rport_attrs[count] = device_attr_rport_##field; \
 793         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 794         i->private_rport_attrs[count].store = NULL;                     \
 795         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 796         if (i->f->show_rport_##field)                                   \
 797                 count++
 798
 799 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
 800         i->private_rport_attrs[count] = device_attr_rport_##field; \
 801         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 802         i->private_rport_attrs[count].store = NULL;                     \
 803         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 804         count++
 805
 806 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
 807         i->private_rport_attrs[count] = device_attr_rport_##field; \
 808         if (!i->f->set_rport_##field) {                                 \
 809                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
 810                 i->private_rport_attrs[count].store = NULL;             \
 811         }                                                               \
 812         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 813         if (i->f->show_rport_##field)                                   \
 814                 count++
 815
 816 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
 817 {                                                                       \
 818         i->private_rport_attrs[count] = device_attr_rport_##field; \
 819         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 820         count++;                                                        \
 821 }
 822
 823
 824 /* The FC Transport Remote Port Attributes: */
 825
 826 /* Fixed Remote Port Attributes */
 827
 828 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
 829
 830 static ssize_t
 831 show_fc_rport_supported_classes (struct device *dev,
 832                                  struct device_attribute *attr, char *buf)
 833 {
 834         struct fc_rport *rport = transport_class_to_rport(dev);
 835         if (rport->supported_classes == FC_COS_UNSPECIFIED)
 836                 return snprintf(buf, 20, "unspecified\n");
 837         return get_fc_cos_names(rport->supported_classes, buf);
 838 }
 839 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
 840                 show_fc_rport_supported_classes, NULL);
 841
 842 /* Dynamic Remote Port Attributes */
 843
 844 /*
 845  * dev_loss_tmo attribute
 846  */
 847 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
 848 {
 849         char *cp;
 850
 851         *val = simple_strtoul(buf, &cp, 0);
 852         if ((*cp && (*cp != '\n')) || (*val < 0))
 853                 return -EINVAL;
 854         /*
 855          * Check for overflow; dev_loss_tmo is u32
 856          */
 857         if (*val > UINT_MAX)
 858                 return -EINVAL;
 859
 860         return 0;
 861 }
 862
 863 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
 864                                      unsigned long val)
 865 {
 866         struct Scsi_Host *shost = rport_to_shost(rport);
 867         struct fc_internal *i = to_fc_internal(shost->transportt);
 868
 869         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 870             (rport->port_state == FC_PORTSTATE_DELETED) ||
 871             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 872                 return -EBUSY;
 873         /*
 874          * Check for overflow; dev_loss_tmo is u32
 875          */
 876         if (val > UINT_MAX)
 877                 return -EINVAL;
 878
 879         /*
 880          * If fast_io_fail is off we have to cap
 881          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
 882          */
 883         if (rport->fast_io_fail_tmo == -1 &&
 884             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
 885                 return -EINVAL;
 886
 887         i->f->set_rport_dev_loss_tmo(rport, val);
 888         return 0;
 889 }
 890
 891 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
 892 static ssize_t
 893 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 894                             const char *buf, size_t count)
 895 {
 896         struct fc_rport *rport = transport_class_to_rport(dev);
 897         unsigned long val;
 898         int rc;
 899
 900         rc = fc_str_to_dev_loss(buf, &val);
 901         if (rc)
 902                 return rc;
 903
 904         rc = fc_rport_set_dev_loss_tmo(rport, val);
 905         if (rc)
 906                 return rc;
 907         return count;
 908 }
 909 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
 910                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
 911
 912
 913 /* Private Remote Port Attributes */
 914
 915 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 916 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 917 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
 918
 919 static ssize_t
 920 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
 921                      char *buf)
 922 {
 923         struct fc_rport *rport = transport_class_to_rport(dev);
 924
 925         /* identify any roles that are port_id specific */
 926         if ((rport->port_id != -1) &&
 927             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
 928                                         FC_WELLKNOWN_PORTID_MASK) {
 929                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
 930                 case FC_FPORT_PORTID:
 931                         return snprintf(buf, 30, "Fabric Port\n");
 932                 case FC_FABCTLR_PORTID:
 933                         return snprintf(buf, 30, "Fabric Controller\n");
 934                 case FC_DIRSRVR_PORTID:
 935                         return snprintf(buf, 30, "Directory Server\n");
 936                 case FC_TIMESRVR_PORTID:
 937                         return snprintf(buf, 30, "Time Server\n");
 938                 case FC_MGMTSRVR_PORTID:
 939                         return snprintf(buf, 30, "Management Server\n");
 940                 default:
 941                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
 942                 }
 943         } else {
 944                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
 945                         return snprintf(buf, 20, "unknown\n");
 946                 return get_fc_port_roles_names(rport->roles, buf);
 947         }
 948 }
 949 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
 950                 show_fc_rport_roles, NULL);
 951
 952 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 953 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
 954
 955 /*
 956  * fast_io_fail_tmo attribute
 957  */
 958 static ssize_t
 959 show_fc_rport_fast_io_fail_tmo (struct device *dev,
 960                                 struct device_attribute *attr, char *buf)
 961 {
 962         struct fc_rport *rport = transport_class_to_rport(dev);
 963
 964         if (rport->fast_io_fail_tmo == -1)
 965                 return snprintf(buf, 5, "off\n");
 966         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
 967 }
 968
 969 static ssize_t
 970 store_fc_rport_fast_io_fail_tmo(struct device *dev,
 971                                 struct device_attribute *attr, const char *buf,
 972                                 size_t count)
 973 {
 974         int val;
 975         char *cp;
 976         struct fc_rport *rport = transport_class_to_rport(dev);
 977
 978         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 979             (rport->port_state == FC_PORTSTATE_DELETED) ||
 980             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 981                 return -EBUSY;
 982         if (strncmp(buf, "off", 3) == 0)
 983                 rport->fast_io_fail_tmo = -1;
 984         else {
 985                 val = simple_strtoul(buf, &cp, 0);
 986                 if ((*cp && (*cp != '\n')) || (val < 0))
 987                         return -EINVAL;
 988                 /*
 989                  * Cap fast_io_fail by dev_loss_tmo or
 990                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 991                  */
 992                 if ((val >= rport->dev_loss_tmo) ||
 993                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
 994                         return -EINVAL;
 995
 996                 rport->fast_io_fail_tmo = val;
 997         }
 998         return count;
 999 }
1000 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1001         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1002
1003
1004 /*
1005  * FC SCSI Target Attribute Management
1006  */
1007
1008 /*
1009  * Note: in the target show function we recognize when the remote
1010  *  port is in the hierarchy and do not allow the driver to get
1011  *  involved in sysfs functions. The driver only gets involved if
1012  *  it's the "old" style that doesn't use rports.
1013  */
1014 #define fc_starget_show_function(field, format_string, sz, cast)        \
1015 static ssize_t                                                          \
1016 show_fc_starget_##field (struct device *dev,                            \
1017                          struct device_attribute *attr, char *buf)      \
1018 {                                                                       \
1019         struct scsi_target *starget = transport_class_to_starget(dev);  \
1020         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1021         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1022         struct fc_rport *rport = starget_to_rport(starget);             \
1023         if (rport)                                                      \
1024                 fc_starget_##field(starget) = rport->field;             \
1025         else if (i->f->get_starget_##field)                             \
1026                 i->f->get_starget_##field(starget);                     \
1027         return snprintf(buf, sz, format_string,                         \
1028                 cast fc_starget_##field(starget));                      \
1029 }
1030
1031 #define fc_starget_rd_attr(field, format_string, sz)                    \
1032         fc_starget_show_function(field, format_string, sz, )            \
1033 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1034                          show_fc_starget_##field, NULL)
1035
1036 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1037         fc_starget_show_function(field, format_string, sz, (cast))      \
1038 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1039                           show_fc_starget_##field, NULL)
1040
1041 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1042         i->private_starget_attrs[count] = device_attr_starget_##field; \
1043         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1044         i->private_starget_attrs[count].store = NULL;                   \
1045         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1046         if (i->f->show_starget_##field)                                 \
1047                 count++
1048
1049 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1050         i->private_starget_attrs[count] = device_attr_starget_##field; \
1051         if (!i->f->set_starget_##field) {                               \
1052                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1053                 i->private_starget_attrs[count].store = NULL;           \
1054         }                                                               \
1055         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1056         if (i->f->show_starget_##field)                                 \
1057                 count++
1058
1059 /* The FC Transport SCSI Target Attributes: */
1060 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1061 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1062 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1063
1064
1065 /*
1066  * FC Virtual Port Attribute Management
1067  */
1068
1069 #define fc_vport_show_function(field, format_string, sz, cast)          \
1070 static ssize_t                                                          \
1071 show_fc_vport_##field (struct device *dev,                              \
1072                        struct device_attribute *attr, char *buf)        \
1073 {                                                                       \
1074         struct fc_vport *vport = transport_class_to_vport(dev);         \
1075         struct Scsi_Host *shost = vport_to_shost(vport);                \
1076         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1077         if ((i->f->get_vport_##field) &&                                \
1078             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1079                 i->f->get_vport_##field(vport);                         \
1080         return snprintf(buf, sz, format_string, cast vport->field);     \
1081 }
1082
1083 #define fc_vport_store_function(field)                                  \
1084 static ssize_t                                                          \
1085 store_fc_vport_##field(struct device *dev,                              \
1086                        struct device_attribute *attr,                   \
1087                        const char *buf, size_t count)                   \
1088 {                                                                       \
1089         int val;                                                        \
1090         struct fc_vport *vport = transport_class_to_vport(dev);         \
1091         struct Scsi_Host *shost = vport_to_shost(vport);                \
1092         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1093         char *cp;                                                       \
1094         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1095                 return -EBUSY;                                          \
1096         val = simple_strtoul(buf, &cp, 0);                              \
1097         if (*cp && (*cp != '\n'))                                       \
1098                 return -EINVAL;                                         \
1099         i->f->set_vport_##field(vport, val);                            \
1100         return count;                                                   \
1101 }
1102
1103 #define fc_vport_store_str_function(field, slen)                        \
1104 static ssize_t                                                          \
1105 store_fc_vport_##field(struct device *dev,                              \
1106                        struct device_attribute *attr,                   \
1107                        const char *buf, size_t count)                   \
1108 {                                                                       \
1109         struct fc_vport *vport = transport_class_to_vport(dev);         \
1110         struct Scsi_Host *shost = vport_to_shost(vport);                \
1111         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1112         unsigned int cnt=count;                                         \
1113                                                                         \
1114         /* count may include a LF at end of string */                   \
1115         if (buf[cnt-1] == '\n')                                         \
1116                 cnt--;                                                  \
1117         if (cnt > ((slen) - 1))                                         \
1118                 return -EINVAL;                                         \
1119         memcpy(vport->field, buf, cnt);                                 \
1120         i->f->set_vport_##field(vport);                                 \
1121         return count;                                                   \
1122 }
1123
1124 #define fc_vport_rd_attr(field, format_string, sz)                      \
1125         fc_vport_show_function(field, format_string, sz, )              \
1126 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1127                          show_fc_vport_##field, NULL)
1128
1129 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1130         fc_vport_show_function(field, format_string, sz, (cast))        \
1131 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1132                           show_fc_vport_##field, NULL)
1133
1134 #define fc_vport_rw_attr(field, format_string, sz)                      \
1135         fc_vport_show_function(field, format_string, sz, )              \
1136         fc_vport_store_function(field)                                  \
1137 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1138                         show_fc_vport_##field,                          \
1139                         store_fc_vport_##field)
1140
1141 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1142 static ssize_t                                                          \
1143 show_fc_vport_##field (struct device *dev,                              \
1144                        struct device_attribute *attr, char *buf)        \
1145 {                                                                       \
1146         struct fc_vport *vport = transport_class_to_vport(dev);         \
1147         return snprintf(buf, sz, format_string, cast vport->field);     \
1148 }
1149
1150 #define fc_private_vport_store_u32_function(field)                      \
1151 static ssize_t                                                          \
1152 store_fc_vport_##field(struct device *dev,                              \
1153                        struct device_attribute *attr,                   \
1154                        const char *buf, size_t count)                   \
1155 {                                                                       \
1156         u32 val;                                                        \
1157         struct fc_vport *vport = transport_class_to_vport(dev);         \
1158         char *cp;                                                       \
1159         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1160                 return -EBUSY;                                          \
1161         val = simple_strtoul(buf, &cp, 0);                              \
1162         if (*cp && (*cp != '\n'))                                       \
1163                 return -EINVAL;                                         \
1164         vport->field = val;                                             \
1165         return count;                                                   \
1166 }
1167
1168
1169 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1170         fc_private_vport_show_function(field, format_string, sz, )      \
1171 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1172                          show_fc_vport_##field, NULL)
1173
1174 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1175         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1176 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1177                           show_fc_vport_##field, NULL)
1178
1179 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1180         fc_private_vport_show_function(field, format_string, sz, )      \
1181         fc_private_vport_store_u32_function(field)                      \
1182 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1183                         show_fc_vport_##field,                          \
1184                         store_fc_vport_##field)
1185
1186
1187 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1188 static ssize_t                                                          \
1189 show_fc_vport_##title (struct device *dev,                              \
1190                        struct device_attribute *attr,                   \
1191                        char *buf)                                       \
1192 {                                                                       \
1193         struct fc_vport *vport = transport_class_to_vport(dev);         \
1194         const char *name;                                               \
1195         name = get_fc_##title##_name(vport->title);                     \
1196         if (!name)                                                      \
1197                 return -EINVAL;                                         \
1198         return snprintf(buf, maxlen, "%s\n", name);                     \
1199 }                                                                       \
1200 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1201                         show_fc_vport_##title, NULL)
1202
1203
1204 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1205         i->private_vport_attrs[count] = device_attr_vport_##field; \
1206         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1207         i->private_vport_attrs[count].store = NULL;                     \
1208         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1209         if (i->f->get_##field)                                          \
1210                 count++
1211         /* NOTE: Above MACRO differs: checks function not show bit */
1212
1213 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1214         i->private_vport_attrs[count] = device_attr_vport_##field; \
1215         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1216         i->private_vport_attrs[count].store = NULL;                     \
1217         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1218         count++
1219
1220 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1221         i->private_vport_attrs[count] = device_attr_vport_##field; \
1222         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1223         if (i->f->field)                                                \
1224                 count++
1225         /* NOTE: Above MACRO differs: checks function */
1226
1227 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1228         i->private_vport_attrs[count] = device_attr_vport_##field; \
1229         if (!i->f->set_vport_##field) {                                 \
1230                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1231                 i->private_vport_attrs[count].store = NULL;             \
1232         }                                                               \
1233         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1234         count++
1235         /* NOTE: Above MACRO differs: does not check show bit */
1236
1237 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1238 {                                                                       \
1239         i->private_vport_attrs[count] = device_attr_vport_##field; \
1240         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1241         count++;                                                        \
1242 }
1243
1244
1245 /* The FC Transport Virtual Port Attributes: */
1246
1247 /* Fixed Virtual Port Attributes */
1248
1249 /* Dynamic Virtual Port Attributes */
1250
1251 /* Private Virtual Port Attributes */
1252
1253 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1254 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1255 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1256 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1257
1258 static ssize_t
1259 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1260                      char *buf)
1261 {
1262         struct fc_vport *vport = transport_class_to_vport(dev);
1263
1264         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1265                 return snprintf(buf, 20, "unknown\n");
1266         return get_fc_port_roles_names(vport->roles, buf);
1267 }
1268 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1269
1270 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1271
1272 fc_private_vport_show_function(symbolic_name, "%s\n",
1273                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1274 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1275 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1276                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1277
1278 static ssize_t
1279 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1280                       const char *buf, size_t count)
1281 {
1282         struct fc_vport *vport = transport_class_to_vport(dev);
1283         struct Scsi_Host *shost = vport_to_shost(vport);
1284         unsigned long flags;
1285
1286         spin_lock_irqsave(shost->host_lock, flags);
1287         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1288                 spin_unlock_irqrestore(shost->host_lock, flags);
1289                 return -EBUSY;
1290         }
1291         vport->flags |= FC_VPORT_DELETING;
1292         spin_unlock_irqrestore(shost->host_lock, flags);
1293
1294         fc_queue_work(shost, &vport->vport_delete_work);
1295         return count;
1296 }
1297 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1298                         NULL, store_fc_vport_delete);
1299
1300
1301 /*
1302  * Enable/Disable vport
1303  *  Write "1" to disable, write "0" to enable
1304  */
1305 static ssize_t
1306 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1307                        const char *buf,
1308                            size_t count)
1309 {
1310         struct fc_vport *vport = transport_class_to_vport(dev);
1311         struct Scsi_Host *shost = vport_to_shost(vport);
1312         struct fc_internal *i = to_fc_internal(shost->transportt);
1313         int stat;
1314
1315         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1316                 return -EBUSY;
1317
1318         if (*buf == '0') {
1319                 if (vport->vport_state != FC_VPORT_DISABLED)
1320                         return -EALREADY;
1321         } else if (*buf == '1') {
1322                 if (vport->vport_state == FC_VPORT_DISABLED)
1323                         return -EALREADY;
1324         } else
1325                 return -EINVAL;
1326
1327         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1328         return stat ? stat : count;
1329 }
1330 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1331                         NULL, store_fc_vport_disable);
1332
1333
1334 /*
1335  * Host Attribute Management
1336  */
1337
1338 #define fc_host_show_function(field, format_string, sz, cast)           \
1339 static ssize_t                                                          \
1340 show_fc_host_##field (struct device *dev,                               \
1341                       struct device_attribute *attr, char *buf)         \
1342 {                                                                       \
1343         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1344         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1345         if (i->f->get_host_##field)                                     \
1346                 i->f->get_host_##field(shost);                          \
1347         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1348 }
1349
1350 #define fc_host_store_function(field)                                   \
1351 static ssize_t                                                          \
1352 store_fc_host_##field(struct device *dev,                               \
1353                       struct device_attribute *attr,                    \
1354                       const char *buf,  size_t count)                   \
1355 {                                                                       \
1356         int val;                                                        \
1357         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1358         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1359         char *cp;                                                       \
1360                                                                         \
1361         val = simple_strtoul(buf, &cp, 0);                              \
1362         if (*cp && (*cp != '\n'))                                       \
1363                 return -EINVAL;                                         \
1364         i->f->set_host_##field(shost, val);                             \
1365         return count;                                                   \
1366 }
1367
1368 #define fc_host_store_str_function(field, slen)                         \
1369 static ssize_t                                                          \
1370 store_fc_host_##field(struct device *dev,                               \
1371                       struct device_attribute *attr,                    \
1372                       const char *buf, size_t count)                    \
1373 {                                                                       \
1374         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1375         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1376         unsigned int cnt=count;                                         \
1377                                                                         \
1378         /* count may include a LF at end of string */                   \
1379         if (buf[cnt-1] == '\n')                                         \
1380                 cnt--;                                                  \
1381         if (cnt > ((slen) - 1))                                         \
1382                 return -EINVAL;                                         \
1383         memcpy(fc_host_##field(shost), buf, cnt);                       \
1384         i->f->set_host_##field(shost);                                  \
1385         return count;                                                   \
1386 }
1387
1388 #define fc_host_rd_attr(field, format_string, sz)                       \
1389         fc_host_show_function(field, format_string, sz, )               \
1390 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1391                          show_fc_host_##field, NULL)
1392
1393 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1394         fc_host_show_function(field, format_string, sz, (cast))         \
1395 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1396                           show_fc_host_##field, NULL)
1397
1398 #define fc_host_rw_attr(field, format_string, sz)                       \
1399         fc_host_show_function(field, format_string, sz, )               \
1400         fc_host_store_function(field)                                   \
1401 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1402                         show_fc_host_##field,                           \
1403                         store_fc_host_##field)
1404
1405 #define fc_host_rd_enum_attr(title, maxlen)                             \
1406 static ssize_t                                                          \
1407 show_fc_host_##title (struct device *dev,                               \
1408                       struct device_attribute *attr, char *buf)         \
1409 {                                                                       \
1410         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1411         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1412         const char *name;                                               \
1413         if (i->f->get_host_##title)                                     \
1414                 i->f->get_host_##title(shost);                          \
1415         name = get_fc_##title##_name(fc_host_##title(shost));           \
1416         if (!name)                                                      \
1417                 return -EINVAL;                                         \
1418         return snprintf(buf, maxlen, "%s\n", name);                     \
1419 }                                                                       \
1420 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1421
1422 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1423         i->private_host_attrs[count] = device_attr_host_##field;        \
1424         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1425         i->private_host_attrs[count].store = NULL;                      \
1426         i->host_attrs[count] = &i->private_host_attrs[count];           \
1427         if (i->f->show_host_##field)                                    \
1428                 count++
1429
1430 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1431         i->private_host_attrs[count] = device_attr_host_##field;        \
1432         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1433         i->private_host_attrs[count].store = NULL;                      \
1434         i->host_attrs[count] = &i->private_host_attrs[count];           \
1435         count++
1436
1437 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1438         i->private_host_attrs[count] = device_attr_host_##field;        \
1439         if (!i->f->set_host_##field) {                                  \
1440                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1441                 i->private_host_attrs[count].store = NULL;              \
1442         }                                                               \
1443         i->host_attrs[count] = &i->private_host_attrs[count];           \
1444         if (i->f->show_host_##field)                                    \
1445                 count++
1446
1447
1448 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1449 static ssize_t                                                          \
1450 show_fc_host_##field (struct device *dev,                               \
1451                       struct device_attribute *attr, char *buf)         \
1452 {                                                                       \
1453         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1454         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1455 }
1456
1457 #define fc_private_host_rd_attr(field, format_string, sz)               \
1458         fc_private_host_show_function(field, format_string, sz, )       \
1459 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1460                          show_fc_host_##field, NULL)
1461
1462 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1463         fc_private_host_show_function(field, format_string, sz, (cast)) \
1464 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1465                           show_fc_host_##field, NULL)
1466
1467 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1468         i->private_host_attrs[count] = device_attr_host_##field;        \
1469         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1470         i->private_host_attrs[count].store = NULL;                      \
1471         i->host_attrs[count] = &i->private_host_attrs[count];           \
1472         count++
1473
1474 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1475 {                                                                       \
1476         i->private_host_attrs[count] = device_attr_host_##field;        \
1477         i->host_attrs[count] = &i->private_host_attrs[count];           \
1478         count++;                                                        \
1479 }
1480
1481
1482 /* Fixed Host Attributes */
1483
1484 static ssize_t
1485 show_fc_host_supported_classes (struct device *dev,
1486                                 struct device_attribute *attr, char *buf)
1487 {
1488         struct Scsi_Host *shost = transport_class_to_shost(dev);
1489
1490         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1491                 return snprintf(buf, 20, "unspecified\n");
1492
1493         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1494 }
1495 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1496                 show_fc_host_supported_classes, NULL);
1497
1498 static ssize_t
1499 show_fc_host_supported_fc4s (struct device *dev,
1500                              struct device_attribute *attr, char *buf)
1501 {
1502         struct Scsi_Host *shost = transport_class_to_shost(dev);
1503         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1504 }
1505 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1506                 show_fc_host_supported_fc4s, NULL);
1507
1508 static ssize_t
1509 show_fc_host_supported_speeds (struct device *dev,
1510                                struct device_attribute *attr, char *buf)
1511 {
1512         struct Scsi_Host *shost = transport_class_to_shost(dev);
1513
1514         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1515                 return snprintf(buf, 20, "unknown\n");
1516
1517         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1518 }
1519 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1520                 show_fc_host_supported_speeds, NULL);
1521
1522
1523 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1524 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1525 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1526                              unsigned long long);
1527 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1528 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1529 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1530 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1531 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1532 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1533 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1534 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1535 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1537
1538
1539 /* Dynamic Host Attributes */
1540
1541 static ssize_t
1542 show_fc_host_active_fc4s (struct device *dev,
1543                           struct device_attribute *attr, char *buf)
1544 {
1545         struct Scsi_Host *shost = transport_class_to_shost(dev);
1546         struct fc_internal *i = to_fc_internal(shost->transportt);
1547
1548         if (i->f->get_host_active_fc4s)
1549                 i->f->get_host_active_fc4s(shost);
1550
1551         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1552 }
1553 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1554                 show_fc_host_active_fc4s, NULL);
1555
1556 static ssize_t
1557 show_fc_host_speed (struct device *dev,
1558                     struct device_attribute *attr, char *buf)
1559 {
1560         struct Scsi_Host *shost = transport_class_to_shost(dev);
1561         struct fc_internal *i = to_fc_internal(shost->transportt);
1562
1563         if (i->f->get_host_speed)
1564                 i->f->get_host_speed(shost);
1565
1566         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1567                 return snprintf(buf, 20, "unknown\n");
1568
1569         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1570 }
1571 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1572                 show_fc_host_speed, NULL);
1573
1574
1575 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1576 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1577 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1578 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1579 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1580
1581 fc_private_host_show_function(system_hostname, "%s\n",
1582                 FC_SYMBOLIC_NAME_SIZE + 1, )
1583 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1584 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1585                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1586
1587
1588 /* Private Host Attributes */
1589
1590 static ssize_t
1591 show_fc_private_host_tgtid_bind_type(struct device *dev,
1592                                      struct device_attribute *attr, char *buf)
1593 {
1594         struct Scsi_Host *shost = transport_class_to_shost(dev);
1595         const char *name;
1596
1597         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1598         if (!name)
1599                 return -EINVAL;
1600         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1601 }
1602
1603 #define get_list_head_entry(pos, head, member)          \
1604         pos = list_entry((head)->next, typeof(*pos), member)
1605
1606 static ssize_t
1607 store_fc_private_host_tgtid_bind_type(struct device *dev,
1608         struct device_attribute *attr, const char *buf, size_t count)
1609 {
1610         struct Scsi_Host *shost = transport_class_to_shost(dev);
1611         struct fc_rport *rport;
1612         enum fc_tgtid_binding_type val;
1613         unsigned long flags;
1614
1615         if (get_fc_tgtid_bind_type_match(buf, &val))
1616                 return -EINVAL;
1617
1618         /* if changing bind type, purge all unused consistent bindings */
1619         if (val != fc_host_tgtid_bind_type(shost)) {
1620                 spin_lock_irqsave(shost->host_lock, flags);
1621                 while (!list_empty(&fc_host_rport_bindings(shost))) {
1622                         get_list_head_entry(rport,
1623                                 &fc_host_rport_bindings(shost), peers);
1624                         list_del(&rport->peers);
1625                         rport->port_state = FC_PORTSTATE_DELETED;
1626                         fc_queue_work(shost, &rport->rport_delete_work);
1627                 }
1628                 spin_unlock_irqrestore(shost->host_lock, flags);
1629         }
1630
1631         fc_host_tgtid_bind_type(shost) = val;
1632         return count;
1633 }
1634
1635 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1636                         show_fc_private_host_tgtid_bind_type,
1637                         store_fc_private_host_tgtid_bind_type);
1638
1639 static ssize_t
1640 store_fc_private_host_issue_lip(struct device *dev,
1641         struct device_attribute *attr, const char *buf, size_t count)
1642 {
1643         struct Scsi_Host *shost = transport_class_to_shost(dev);
1644         struct fc_internal *i = to_fc_internal(shost->transportt);
1645         int ret;
1646
1647         /* ignore any data value written to the attribute */
1648         if (i->f->issue_fc_host_lip) {
1649                 ret = i->f->issue_fc_host_lip(shost);
1650                 return ret ? ret: count;
1651         }
1652
1653         return -ENOENT;
1654 }
1655
1656 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1657                         store_fc_private_host_issue_lip);
1658
1659 static ssize_t
1660 store_fc_private_host_dev_loss_tmo(struct device *dev,
1661                                    struct device_attribute *attr,
1662                                    const char *buf, size_t count)
1663 {
1664         struct Scsi_Host *shost = transport_class_to_shost(dev);
1665         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1666         struct fc_rport *rport;
1667         unsigned long val, flags;
1668         int rc;
1669
1670         rc = fc_str_to_dev_loss(buf, &val);
1671         if (rc)
1672                 return rc;
1673
1674         fc_host_dev_loss_tmo(shost) = val;
1675         spin_lock_irqsave(shost->host_lock, flags);
1676         list_for_each_entry(rport, &fc_host->rports, peers)
1677                 fc_rport_set_dev_loss_tmo(rport, val);
1678         spin_unlock_irqrestore(shost->host_lock, flags);
1679         return count;
1680 }
1681
1682 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1683 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1684                       show_fc_host_dev_loss_tmo,
1685                       store_fc_private_host_dev_loss_tmo);
1686
1687 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1688
1689 /*
1690  * Host Statistics Management
1691  */
1692
1693 /* Show a given an attribute in the statistics group */
1694 static ssize_t
1695 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1696 {
1697         struct Scsi_Host *shost = transport_class_to_shost(dev);
1698         struct fc_internal *i = to_fc_internal(shost->transportt);
1699         struct fc_host_statistics *stats;
1700         ssize_t ret = -ENOENT;
1701
1702         if (offset > sizeof(struct fc_host_statistics) ||
1703             offset % sizeof(u64) != 0)
1704                 WARN_ON(1);
1705
1706         if (i->f->get_fc_host_stats) {
1707                 stats = (i->f->get_fc_host_stats)(shost);
1708                 if (stats)
1709                         ret = snprintf(buf, 20, "0x%llx\n",
1710                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1711         }
1712         return ret;
1713 }
1714
1715
1716 /* generate a read-only statistics attribute */
1717 #define fc_host_statistic(name)                                         \
1718 static ssize_t show_fcstat_##name(struct device *cd,                    \
1719                                   struct device_attribute *attr,        \
1720                                   char *buf)                            \
1721 {                                                                       \
1722         return fc_stat_show(cd, buf,                                    \
1723                             offsetof(struct fc_host_statistics, name)); \
1724 }                                                                       \
1725 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1726
1727 fc_host_statistic(seconds_since_last_reset);
1728 fc_host_statistic(tx_frames);
1729 fc_host_statistic(tx_words);
1730 fc_host_statistic(rx_frames);
1731 fc_host_statistic(rx_words);
1732 fc_host_statistic(lip_count);
1733 fc_host_statistic(nos_count);
1734 fc_host_statistic(error_frames);
1735 fc_host_statistic(dumped_frames);
1736 fc_host_statistic(link_failure_count);
1737 fc_host_statistic(loss_of_sync_count);
1738 fc_host_statistic(loss_of_signal_count);
1739 fc_host_statistic(prim_seq_protocol_err_count);
1740 fc_host_statistic(invalid_tx_word_count);
1741 fc_host_statistic(invalid_crc_count);
1742 fc_host_statistic(fcp_input_requests);
1743 fc_host_statistic(fcp_output_requests);
1744 fc_host_statistic(fcp_control_requests);
1745 fc_host_statistic(fcp_input_megabytes);
1746 fc_host_statistic(fcp_output_megabytes);
1747 fc_host_statistic(fcp_packet_alloc_failures);
1748 fc_host_statistic(fcp_packet_aborts);
1749 fc_host_statistic(fcp_frame_alloc_failures);
1750 fc_host_statistic(fc_no_free_exch);
1751 fc_host_statistic(fc_no_free_exch_xid);
1752 fc_host_statistic(fc_xid_not_found);
1753 fc_host_statistic(fc_xid_busy);
1754 fc_host_statistic(fc_seq_not_found);
1755 fc_host_statistic(fc_non_bls_resp);
1756
1757 static ssize_t
1758 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1759                     const char *buf, size_t count)
1760 {
1761         struct Scsi_Host *shost = transport_class_to_shost(dev);
1762         struct fc_internal *i = to_fc_internal(shost->transportt);
1763
1764         /* ignore any data value written to the attribute */
1765         if (i->f->reset_fc_host_stats) {
1766                 i->f->reset_fc_host_stats(shost);
1767                 return count;
1768         }
1769
1770         return -ENOENT;
1771 }
1772 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1773                                 fc_reset_statistics);
1774
1775 static struct attribute *fc_statistics_attrs[] = {
1776         &device_attr_host_seconds_since_last_reset.attr,
1777         &device_attr_host_tx_frames.attr,
1778         &device_attr_host_tx_words.attr,
1779         &device_attr_host_rx_frames.attr,
1780         &device_attr_host_rx_words.attr,
1781         &device_attr_host_lip_count.attr,
1782         &device_attr_host_nos_count.attr,
1783         &device_attr_host_error_frames.attr,
1784         &device_attr_host_dumped_frames.attr,
1785         &device_attr_host_link_failure_count.attr,
1786         &device_attr_host_loss_of_sync_count.attr,
1787         &device_attr_host_loss_of_signal_count.attr,
1788         &device_attr_host_prim_seq_protocol_err_count.attr,
1789         &device_attr_host_invalid_tx_word_count.attr,
1790         &device_attr_host_invalid_crc_count.attr,
1791         &device_attr_host_fcp_input_requests.attr,
1792         &device_attr_host_fcp_output_requests.attr,
1793         &device_attr_host_fcp_control_requests.attr,
1794         &device_attr_host_fcp_input_megabytes.attr,
1795         &device_attr_host_fcp_output_megabytes.attr,
1796         &device_attr_host_fcp_packet_alloc_failures.attr,
1797         &device_attr_host_fcp_packet_aborts.attr,
1798         &device_attr_host_fcp_frame_alloc_failures.attr,
1799         &device_attr_host_fc_no_free_exch.attr,
1800         &device_attr_host_fc_no_free_exch_xid.attr,
1801         &device_attr_host_fc_xid_not_found.attr,
1802         &device_attr_host_fc_xid_busy.attr,
1803         &device_attr_host_fc_seq_not_found.attr,
1804         &device_attr_host_fc_non_bls_resp.attr,
1805         &device_attr_host_reset_statistics.attr,
1806         NULL
1807 };
1808
1809 static struct attribute_group fc_statistics_group = {
1810         .name = "statistics",
1811         .attrs = fc_statistics_attrs,
1812 };
1813
1814
1815 /* Host Vport Attributes */
1816
1817 static int
1818 fc_parse_wwn(const char *ns, u64 *nm)
1819 {
1820         unsigned int i, j;
1821         u8 wwn[8];
1822
1823         memset(wwn, 0, sizeof(wwn));
1824
1825         /* Validate and store the new name */
1826         for (i=0, j=0; i < 16; i++) {
1827                 int value;
1828
1829                 value = hex_to_bin(*ns++);
1830                 if (value >= 0)
1831                         j = (j << 4) | value;
1832                 else
1833                         return -EINVAL;
1834                 if (i % 2) {
1835                         wwn[i/2] = j & 0xff;
1836                         j = 0;
1837                 }
1838         }
1839
1840         *nm = wwn_to_u64(wwn);
1841
1842         return 0;
1843 }
1844
1845
1846 /*
1847  * "Short-cut" sysfs variable to create a new vport on a FC Host.
1848  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1849  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1850  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1851  */
1852 static ssize_t
1853 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1854                            const char *buf, size_t count)
1855 {
1856         struct Scsi_Host *shost = transport_class_to_shost(dev);
1857         struct fc_vport_identifiers vid;
1858         struct fc_vport *vport;
1859         unsigned int cnt=count;
1860         int stat;
1861
1862         memset(&vid, 0, sizeof(vid));
1863
1864         /* count may include a LF at end of string */
1865         if (buf[cnt-1] == '\n')
1866                 cnt--;
1867
1868         /* validate we have enough characters for WWPN */
1869         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1870                 return -EINVAL;
1871
1872         stat = fc_parse_wwn(&buf[0], &vid.port_name);
1873         if (stat)
1874                 return stat;
1875
1876         stat = fc_parse_wwn(&buf[17], &vid.node_name);
1877         if (stat)
1878                 return stat;
1879
1880         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1881         vid.vport_type = FC_PORTTYPE_NPIV;
1882         /* vid.symbolic_name is already zero/NULL's */
1883         vid.disable = false;            /* always enabled */
1884
1885         /* we only allow support on Channel 0 !!! */
1886         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1887         return stat ? stat : count;
1888 }
1889 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1890                         store_fc_host_vport_create);
1891
1892
1893 /*
1894  * "Short-cut" sysfs variable to delete a vport on a FC Host.
1895  * Vport is identified by a string containing "<WWPN>:<WWNN>".
1896  * The WWNs are specified as hex characters, and may *not* contain
1897  * any prefixes (e.g. 0x, x, etc)
1898  */
1899 static ssize_t
1900 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1901                            const char *buf, size_t count)
1902 {
1903         struct Scsi_Host *shost = transport_class_to_shost(dev);
1904         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1905         struct fc_vport *vport;
1906         u64 wwpn, wwnn;
1907         unsigned long flags;
1908         unsigned int cnt=count;
1909         int stat, match;
1910
1911         /* count may include a LF at end of string */
1912         if (buf[cnt-1] == '\n')
1913                 cnt--;
1914
1915         /* validate we have enough characters for WWPN */
1916         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1917                 return -EINVAL;
1918
1919         stat = fc_parse_wwn(&buf[0], &wwpn);
1920         if (stat)
1921                 return stat;
1922
1923         stat = fc_parse_wwn(&buf[17], &wwnn);
1924         if (stat)
1925                 return stat;
1926
1927         spin_lock_irqsave(shost->host_lock, flags);
1928         match = 0;
1929         /* we only allow support on Channel 0 !!! */
1930         list_for_each_entry(vport, &fc_host->vports, peers) {
1931                 if ((vport->channel == 0) &&
1932                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1933                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1934                                 break;
1935                         vport->flags |= FC_VPORT_DELETING;
1936                         match = 1;
1937                         break;
1938                 }
1939         }
1940         spin_unlock_irqrestore(shost->host_lock, flags);
1941
1942         if (!match)
1943                 return -ENODEV;
1944
1945         stat = fc_vport_terminate(vport);
1946         return stat ? stat : count;
1947 }
1948 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1949                         store_fc_host_vport_delete);
1950
1951
1952 static int fc_host_match(struct attribute_container *cont,
1953                           struct device *dev)
1954 {
1955         struct Scsi_Host *shost;
1956         struct fc_internal *i;
1957
1958         if (!scsi_is_host_device(dev))
1959                 return 0;
1960
1961         shost = dev_to_shost(dev);
1962         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1963             != &fc_host_class.class)
1964                 return 0;
1965
1966         i = to_fc_internal(shost->transportt);
1967
1968         return &i->t.host_attrs.ac == cont;
1969 }
1970
1971 static int fc_target_match(struct attribute_container *cont,
1972                             struct device *dev)
1973 {
1974         struct Scsi_Host *shost;
1975         struct fc_internal *i;
1976
1977         if (!scsi_is_target_device(dev))
1978                 return 0;
1979
1980         shost = dev_to_shost(dev->parent);
1981         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1982             != &fc_host_class.class)
1983                 return 0;
1984
1985         i = to_fc_internal(shost->transportt);
1986
1987         return &i->t.target_attrs.ac == cont;
1988 }
1989
1990 static void fc_rport_dev_release(struct device *dev)
1991 {
1992         struct fc_rport *rport = dev_to_rport(dev);
1993         put_device(dev->parent);
1994         kfree(rport);
1995 }
1996
1997 int scsi_is_fc_rport(const struct device *dev)
1998 {
1999         return dev->release == fc_rport_dev_release;
2000 }
2001 EXPORT_SYMBOL(scsi_is_fc_rport);
2002
2003 static int fc_rport_match(struct attribute_container *cont,
2004                             struct device *dev)
2005 {
2006         struct Scsi_Host *shost;
2007         struct fc_internal *i;
2008
2009         if (!scsi_is_fc_rport(dev))
2010                 return 0;
2011
2012         shost = dev_to_shost(dev->parent);
2013         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2014             != &fc_host_class.class)
2015                 return 0;
2016
2017         i = to_fc_internal(shost->transportt);
2018
2019         return &i->rport_attr_cont.ac == cont;
2020 }
2021
2022
2023 static void fc_vport_dev_release(struct device *dev)
2024 {
2025         struct fc_vport *vport = dev_to_vport(dev);
2026         put_device(dev->parent);                /* release kobj parent */
2027         kfree(vport);
2028 }
2029
2030 static int scsi_is_fc_vport(const struct device *dev)
2031 {
2032         return dev->release == fc_vport_dev_release;
2033 }
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,
2113                                          SCSI_SCAN_MANUAL);
2114                         return;
2115                 }
2116         }
2117
2118         spin_unlock_irqrestore(shost->host_lock, flags);
2119 }
2120
2121 /*
2122  * Called via sysfs scan routines. Necessary, as the FC transport
2123  * wants to place all target objects below the rport object. So this
2124  * routine must invoke the scsi_scan_target() routine with the rport
2125  * object as the parent.
2126  */
2127 static int
2128 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2129 {
2130         uint chlo, chhi;
2131         uint tgtlo, tgthi;
2132
2133         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2134             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2135             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2136                 return -EINVAL;
2137
2138         if (channel == SCAN_WILD_CARD) {
2139                 chlo = 0;
2140                 chhi = shost->max_channel + 1;
2141         } else {
2142                 chlo = channel;
2143                 chhi = channel + 1;
2144         }
2145
2146         if (id == SCAN_WILD_CARD) {
2147                 tgtlo = 0;
2148                 tgthi = shost->max_id;
2149         } else {
2150                 tgtlo = id;
2151                 tgthi = id + 1;
2152         }
2153
2154         for ( ; chlo < chhi; chlo++)
2155                 for ( ; tgtlo < tgthi; tgtlo++)
2156                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2157
2158         return 0;
2159 }
2160
2161 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2162                                 int result)
2163 {
2164         struct fc_internal *i = to_fc_internal(shost->transportt);
2165         return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2166 }
2167
2168 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2169 {
2170         struct fc_internal *i = to_fc_internal(shost->transportt);
2171         return i->f->it_nexus_response(shost, nexus, result);
2172 }
2173
2174 struct scsi_transport_template *
2175 fc_attach_transport(struct fc_function_template *ft)
2176 {
2177         int count;
2178         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2179                                         GFP_KERNEL);
2180
2181         if (unlikely(!i))
2182                 return NULL;
2183
2184         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2185         i->t.target_attrs.ac.class = &fc_transport_class.class;
2186         i->t.target_attrs.ac.match = fc_target_match;
2187         i->t.target_size = sizeof(struct fc_starget_attrs);
2188         transport_container_register(&i->t.target_attrs);
2189
2190         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2191         i->t.host_attrs.ac.class = &fc_host_class.class;
2192         i->t.host_attrs.ac.match = fc_host_match;
2193         i->t.host_size = sizeof(struct fc_host_attrs);
2194         if (ft->get_fc_host_stats)
2195                 i->t.host_attrs.statistics = &fc_statistics_group;
2196         transport_container_register(&i->t.host_attrs);
2197
2198         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2199         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2200         i->rport_attr_cont.ac.match = fc_rport_match;
2201         transport_container_register(&i->rport_attr_cont);
2202
2203         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2204         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2205         i->vport_attr_cont.ac.match = fc_vport_match;
2206         transport_container_register(&i->vport_attr_cont);
2207
2208         i->f = ft;
2209
2210         /* Transport uses the shost workq for scsi scanning */
2211         i->t.create_work_queue = 1;
2212
2213         i->t.eh_timed_out = fc_timed_out;
2214
2215         i->t.user_scan = fc_user_scan;
2216
2217         /* target-mode drivers' functions */
2218         i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2219         i->t.it_nexus_response = fc_it_nexus_response;
2220
2221         /*
2222          * Setup SCSI Target Attributes.
2223          */
2224         count = 0;
2225         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2226         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2227         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2228
2229         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2230
2231         i->starget_attrs[count] = NULL;
2232
2233
2234         /*
2235          * Setup SCSI Host Attributes.
2236          */
2237         count=0;
2238         SETUP_HOST_ATTRIBUTE_RD(node_name);
2239         SETUP_HOST_ATTRIBUTE_RD(port_name);
2240         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2241         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2242         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2243         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2244         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2245         if (ft->vport_create) {
2246                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2247                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2248         }
2249         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2250         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2251         SETUP_HOST_ATTRIBUTE_RD(model);
2252         SETUP_HOST_ATTRIBUTE_RD(model_description);
2253         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2254         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2255         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2256         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2257
2258         SETUP_HOST_ATTRIBUTE_RD(port_id);
2259         SETUP_HOST_ATTRIBUTE_RD(port_type);
2260         SETUP_HOST_ATTRIBUTE_RD(port_state);
2261         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2262         SETUP_HOST_ATTRIBUTE_RD(speed);
2263         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2264         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2265         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2266
2267         /* Transport-managed attributes */
2268         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2269         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2270         if (ft->issue_fc_host_lip)
2271                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2272         if (ft->vport_create)
2273                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2274         if (ft->vport_delete)
2275                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2276
2277         BUG_ON(count > FC_HOST_NUM_ATTRS);
2278
2279         i->host_attrs[count] = NULL;
2280
2281         /*
2282          * Setup Remote Port Attributes.
2283          */
2284         count=0;
2285         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2286         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2287         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2288         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2289         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2290         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2291         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2292         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2293         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2294         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2295
2296         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2297
2298         i->rport_attrs[count] = NULL;
2299
2300         /*
2301          * Setup Virtual Port Attributes.
2302          */
2303         count=0;
2304         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2305         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2306         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2307         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2308         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2309         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2310         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2311         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2312         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2313
2314         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2315
2316         i->vport_attrs[count] = NULL;
2317
2318         return &i->t;
2319 }
2320 EXPORT_SYMBOL(fc_attach_transport);
2321
2322 void fc_release_transport(struct scsi_transport_template *t)
2323 {
2324         struct fc_internal *i = to_fc_internal(t);
2325
2326         transport_container_unregister(&i->t.target_attrs);
2327         transport_container_unregister(&i->t.host_attrs);
2328         transport_container_unregister(&i->rport_attr_cont);
2329         transport_container_unregister(&i->vport_attr_cont);
2330
2331         kfree(i);
2332 }
2333 EXPORT_SYMBOL(fc_release_transport);
2334
2335 /**
2336  * fc_queue_work - Queue work to the fc_host workqueue.
2337  * @shost:      Pointer to Scsi_Host bound to fc_host.
2338  * @work:       Work to queue for execution.
2339  *
2340  * Return value:
2341  *      1 - work queued for execution
2342  *      0 - work is already queued
2343  *      -EINVAL - work queue doesn't exist
2344  */
2345 static int
2346 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2347 {
2348         if (unlikely(!fc_host_work_q(shost))) {
2349                 printk(KERN_ERR
2350                         "ERROR: FC host '%s' attempted to queue work, "
2351                         "when no workqueue created.\n", shost->hostt->name);
2352                 dump_stack();
2353
2354                 return -EINVAL;
2355         }
2356
2357         return queue_work(fc_host_work_q(shost), work);
2358 }
2359
2360 /**
2361  * fc_flush_work - Flush a fc_host's workqueue.
2362  * @shost:      Pointer to Scsi_Host bound to fc_host.
2363  */
2364 static void
2365 fc_flush_work(struct Scsi_Host *shost)
2366 {
2367         if (!fc_host_work_q(shost)) {
2368                 printk(KERN_ERR
2369                         "ERROR: FC host '%s' attempted to flush work, "
2370                         "when no workqueue created.\n", shost->hostt->name);
2371                 dump_stack();
2372                 return;
2373         }
2374
2375         flush_workqueue(fc_host_work_q(shost));
2376 }
2377
2378 /**
2379  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2380  * @shost:      Pointer to Scsi_Host bound to fc_host.
2381  * @work:       Work to queue for execution.
2382  * @delay:      jiffies to delay the work queuing
2383  *
2384  * Return value:
2385  *      1 on success / 0 already queued / < 0 for error
2386  */
2387 static int
2388 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2389                                 unsigned long delay)
2390 {
2391         if (unlikely(!fc_host_devloss_work_q(shost))) {
2392                 printk(KERN_ERR
2393                         "ERROR: FC host '%s' attempted to queue work, "
2394                         "when no workqueue created.\n", shost->hostt->name);
2395                 dump_stack();
2396
2397                 return -EINVAL;
2398         }
2399
2400         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2401 }
2402
2403 /**
2404  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2405  * @shost:      Pointer to Scsi_Host bound to fc_host.
2406  */
2407 static void
2408 fc_flush_devloss(struct Scsi_Host *shost)
2409 {
2410         if (!fc_host_devloss_work_q(shost)) {
2411                 printk(KERN_ERR
2412                         "ERROR: FC host '%s' attempted to flush work, "
2413                         "when no workqueue created.\n", shost->hostt->name);
2414                 dump_stack();
2415                 return;
2416         }
2417
2418         flush_workqueue(fc_host_devloss_work_q(shost));
2419 }
2420
2421
2422 /**
2423  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2424  * @shost:      Which &Scsi_Host
2425  *
2426  * This routine is expected to be called immediately preceding the
2427  * a driver's call to scsi_remove_host().
2428  *
2429  * WARNING: A driver utilizing the fc_transport, which fails to call
2430  *   this routine prior to scsi_remove_host(), will leave dangling
2431  *   objects in /sys/class/fc_remote_ports. Access to any of these
2432  *   objects can result in a system crash !!!
2433  *
2434  * Notes:
2435  *      This routine assumes no locks are held on entry.
2436  */
2437 void
2438 fc_remove_host(struct Scsi_Host *shost)
2439 {
2440         struct fc_vport *vport = NULL, *next_vport = NULL;
2441         struct fc_rport *rport = NULL, *next_rport = NULL;
2442         struct workqueue_struct *work_q;
2443         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2444         unsigned long flags;
2445
2446         spin_lock_irqsave(shost->host_lock, flags);
2447
2448         /* Remove any vports */
2449         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2450                 fc_queue_work(shost, &vport->vport_delete_work);
2451
2452         /* Remove any remote ports */
2453         list_for_each_entry_safe(rport, next_rport,
2454                         &fc_host->rports, peers) {
2455                 list_del(&rport->peers);
2456                 rport->port_state = FC_PORTSTATE_DELETED;
2457                 fc_queue_work(shost, &rport->rport_delete_work);
2458         }
2459
2460         list_for_each_entry_safe(rport, next_rport,
2461                         &fc_host->rport_bindings, peers) {
2462                 list_del(&rport->peers);
2463                 rport->port_state = FC_PORTSTATE_DELETED;
2464                 fc_queue_work(shost, &rport->rport_delete_work);
2465         }
2466
2467         spin_unlock_irqrestore(shost->host_lock, flags);
2468
2469         /* flush all scan work items */
2470         scsi_flush_work(shost);
2471
2472         /* flush all stgt delete, and rport delete work items, then kill it  */
2473         if (fc_host->work_q) {
2474                 work_q = fc_host->work_q;
2475                 fc_host->work_q = NULL;
2476                 destroy_workqueue(work_q);
2477         }
2478
2479         /* flush all devloss work items, then kill it  */
2480         if (fc_host->devloss_work_q) {
2481                 work_q = fc_host->devloss_work_q;
2482                 fc_host->devloss_work_q = NULL;
2483                 destroy_workqueue(work_q);
2484         }
2485 }
2486 EXPORT_SYMBOL(fc_remove_host);
2487
2488 static void fc_terminate_rport_io(struct fc_rport *rport)
2489 {
2490         struct Scsi_Host *shost = rport_to_shost(rport);
2491         struct fc_internal *i = to_fc_internal(shost->transportt);
2492
2493         /* Involve the LLDD if possible to terminate all io on the rport. */
2494         if (i->f->terminate_rport_io)
2495                 i->f->terminate_rport_io(rport);
2496
2497         /*
2498          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2499          */
2500         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2501 }
2502
2503 /**
2504  * fc_starget_delete - called to delete the scsi descendants of an rport
2505  * @work:       remote port to be operated on.
2506  *
2507  * Deletes target and all sdevs.
2508  */
2509 static void
2510 fc_starget_delete(struct work_struct *work)
2511 {
2512         struct fc_rport *rport =
2513                 container_of(work, struct fc_rport, stgt_delete_work);
2514
2515         fc_terminate_rport_io(rport);
2516         scsi_remove_target(&rport->dev);
2517 }
2518
2519
2520 /**
2521  * fc_rport_final_delete - finish rport termination and delete it.
2522  * @work:       remote port to be deleted.
2523  */
2524 static void
2525 fc_rport_final_delete(struct work_struct *work)
2526 {
2527         struct fc_rport *rport =
2528                 container_of(work, struct fc_rport, rport_delete_work);
2529         struct device *dev = &rport->dev;
2530         struct Scsi_Host *shost = rport_to_shost(rport);
2531         struct fc_internal *i = to_fc_internal(shost->transportt);
2532         unsigned long flags;
2533         int do_callback = 0;
2534
2535         fc_terminate_rport_io(rport);
2536
2537         /*
2538          * if a scan is pending, flush the SCSI Host work_q so that
2539          * that we can reclaim the rport scan work element.
2540          */
2541         if (rport->flags & FC_RPORT_SCAN_PENDING)
2542                 scsi_flush_work(shost);
2543
2544         /*
2545          * Cancel any outstanding timers. These should really exist
2546          * only when rmmod'ing the LLDD and we're asking for
2547          * immediate termination of the rports
2548          */
2549         spin_lock_irqsave(shost->host_lock, flags);
2550         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2551                 spin_unlock_irqrestore(shost->host_lock, flags);
2552                 if (!cancel_delayed_work(&rport->fail_io_work))
2553                         fc_flush_devloss(shost);
2554                 if (!cancel_delayed_work(&rport->dev_loss_work))
2555                         fc_flush_devloss(shost);
2556                 cancel_work_sync(&rport->scan_work);
2557                 spin_lock_irqsave(shost->host_lock, flags);
2558                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2559         }
2560         spin_unlock_irqrestore(shost->host_lock, flags);
2561
2562         /* Delete SCSI target and sdevs */
2563         if (rport->scsi_target_id != -1)
2564                 fc_starget_delete(&rport->stgt_delete_work);
2565
2566         /*
2567          * Notify the driver that the rport is now dead. The LLDD will
2568          * also guarantee that any communication to the rport is terminated
2569          *
2570          * Avoid this call if we already called it when we preserved the
2571          * rport for the binding.
2572          */
2573         spin_lock_irqsave(shost->host_lock, flags);
2574         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2575             (i->f->dev_loss_tmo_callbk)) {
2576                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2577                 do_callback = 1;
2578         }
2579         spin_unlock_irqrestore(shost->host_lock, flags);
2580
2581         if (do_callback)
2582                 i->f->dev_loss_tmo_callbk(rport);
2583
2584         fc_bsg_remove(rport->rqst_q);
2585
2586         transport_remove_device(dev);
2587         device_del(dev);
2588         transport_destroy_device(dev);
2589         scsi_host_put(shost);                   /* for fc_host->rport list */
2590         put_device(dev);                        /* for self-reference */
2591 }
2592
2593
2594 /**
2595  * fc_rport_create - allocates and creates a remote FC port.
2596  * @shost:      scsi host the remote port is connected to.
2597  * @channel:    Channel on shost port connected to.
2598  * @ids:        The world wide names, fc address, and FC4 port
2599  *              roles for the remote port.
2600  *
2601  * Allocates and creates the remoter port structure, including the
2602  * class and sysfs creation.
2603  *
2604  * Notes:
2605  *      This routine assumes no locks are held on entry.
2606  */
2607 static struct fc_rport *
2608 fc_rport_create(struct Scsi_Host *shost, int channel,
2609         struct fc_rport_identifiers  *ids)
2610 {
2611         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2612         struct fc_internal *fci = to_fc_internal(shost->transportt);
2613         struct fc_rport *rport;
2614         struct device *dev;
2615         unsigned long flags;
2616         int error;
2617         size_t size;
2618
2619         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2620         rport = kzalloc(size, GFP_KERNEL);
2621         if (unlikely(!rport)) {
2622                 printk(KERN_ERR "%s: allocation failure\n", __func__);
2623                 return NULL;
2624         }
2625
2626         rport->maxframe_size = -1;
2627         rport->supported_classes = FC_COS_UNSPECIFIED;
2628         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2629         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2630         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2631         rport->port_id = ids->port_id;
2632         rport->roles = ids->roles;
2633         rport->port_state = FC_PORTSTATE_ONLINE;
2634         if (fci->f->dd_fcrport_size)
2635                 rport->dd_data = &rport[1];
2636         rport->channel = channel;
2637         rport->fast_io_fail_tmo = -1;
2638
2639         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2640         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2641         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2642         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2643         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2644
2645         spin_lock_irqsave(shost->host_lock, flags);
2646
2647         rport->number = fc_host->next_rport_number++;
2648         if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2649                 rport->scsi_target_id = fc_host->next_target_id++;
2650         else
2651                 rport->scsi_target_id = -1;
2652         list_add_tail(&rport->peers, &fc_host->rports);
2653         scsi_host_get(shost);                   /* for fc_host->rport list */
2654
2655         spin_unlock_irqrestore(shost->host_lock, flags);
2656
2657         dev = &rport->dev;
2658         device_initialize(dev);                 /* takes self reference */
2659         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2660         dev->release = fc_rport_dev_release;
2661         dev_set_name(dev, "rport-%d:%d-%d",
2662                      shost->host_no, channel, rport->number);
2663         transport_setup_device(dev);
2664
2665         error = device_add(dev);
2666         if (error) {
2667                 printk(KERN_ERR "FC Remote Port device_add failed\n");
2668                 goto delete_rport;
2669         }
2670         transport_add_device(dev);
2671         transport_configure_device(dev);
2672
2673         fc_bsg_rportadd(shost, rport);
2674         /* ignore any bsg add error - we just can't do sgio */
2675
2676         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2677                 /* initiate a scan of the target */
2678                 rport->flags |= FC_RPORT_SCAN_PENDING;
2679                 scsi_queue_work(shost, &rport->scan_work);
2680         }
2681
2682         return rport;
2683
2684 delete_rport:
2685         transport_destroy_device(dev);
2686         spin_lock_irqsave(shost->host_lock, flags);
2687         list_del(&rport->peers);
2688         scsi_host_put(shost);                   /* for fc_host->rport list */
2689         spin_unlock_irqrestore(shost->host_lock, flags);
2690         put_device(dev->parent);
2691         kfree(rport);
2692         return NULL;
2693 }
2694
2695 /**
2696  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2697  * @shost:      scsi host the remote port is connected to.
2698  * @channel:    Channel on shost port connected to.
2699  * @ids:        The world wide names, fc address, and FC4 port
2700  *              roles for the remote port.
2701  *
2702  * The LLDD calls this routine to notify the transport of the existence
2703  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2704  * of the port, it's FC address (port_id), and the FC4 roles that are
2705  * active for the port.
2706  *
2707  * For ports that are FCP targets (aka scsi targets), the FC transport
2708  * maintains consistent target id bindings on behalf of the LLDD.
2709  * A consistent target id binding is an assignment of a target id to
2710  * a remote port identifier, which persists while the scsi host is
2711  * attached. The remote port can disappear, then later reappear, and
2712  * it's target id assignment remains the same. This allows for shifts
2713  * in FC addressing (if binding by wwpn or wwnn) with no apparent
2714  * changes to the scsi subsystem which is based on scsi host number and
2715  * target id values.  Bindings are only valid during the attachment of
2716  * the scsi host. If the host detaches, then later re-attaches, target
2717  * id bindings may change.
2718  *
2719  * This routine is responsible for returning a remote port structure.
2720  * The routine will search the list of remote ports it maintains
2721  * internally on behalf of consistent target id mappings. If found, the
2722  * remote port structure will be reused. Otherwise, a new remote port
2723  * structure will be allocated.
2724  *
2725  * Whenever a remote port is allocated, a new fc_remote_port class
2726  * device is created.
2727  *
2728  * Should not be called from interrupt context.
2729  *
2730  * Notes:
2731  *      This routine assumes no locks are held on entry.
2732  */
2733 struct fc_rport *
2734 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2735         struct fc_rport_identifiers  *ids)
2736 {
2737         struct fc_internal *fci = to_fc_internal(shost->transportt);
2738         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2739         struct fc_rport *rport;
2740         unsigned long flags;
2741         int match = 0;
2742
2743         /* ensure any stgt delete functions are done */
2744         fc_flush_work(shost);
2745
2746         /*
2747          * Search the list of "active" rports, for an rport that has been
2748          * deleted, but we've held off the real delete while the target
2749          * is in a "blocked" state.
2750          */
2751         spin_lock_irqsave(shost->host_lock, flags);
2752
2753         list_for_each_entry(rport, &fc_host->rports, peers) {
2754
2755                 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2756                         (rport->channel == channel)) {
2757
2758                         switch (fc_host->tgtid_bind_type) {
2759                         case FC_TGTID_BIND_BY_WWPN:
2760                         case FC_TGTID_BIND_NONE:
2761                                 if (rport->port_name == ids->port_name)
2762                                         match = 1;
2763                                 break;
2764                         case FC_TGTID_BIND_BY_WWNN:
2765                                 if (rport->node_name == ids->node_name)
2766                                         match = 1;
2767                                 break;
2768                         case FC_TGTID_BIND_BY_ID:
2769                                 if (rport->port_id == ids->port_id)
2770                                         match = 1;
2771                                 break;
2772                         }
2773
2774                         if (match) {
2775
2776                                 memcpy(&rport->node_name, &ids->node_name,
2777                                         sizeof(rport->node_name));
2778                                 memcpy(&rport->port_name, &ids->port_name,
2779                                         sizeof(rport->port_name));
2780                                 rport->port_id = ids->port_id;
2781
2782                                 rport->port_state = FC_PORTSTATE_ONLINE;
2783                                 rport->roles = ids->roles;
2784
2785                                 spin_unlock_irqrestore(shost->host_lock, flags);
2786
2787                                 if (fci->f->dd_fcrport_size)
2788                                         memset(rport->dd_data, 0,
2789                                                 fci->f->dd_fcrport_size);
2790
2791                                 /*
2792                                  * If we were not a target, cancel the
2793                                  * io terminate and rport timers, and
2794                                  * we're done.
2795                                  *
2796                                  * If we were a target, but our new role
2797                                  * doesn't indicate a target, leave the
2798                                  * timers running expecting the role to
2799                                  * change as the target fully logs in. If
2800                                  * it doesn't, the target will be torn down.
2801                                  *
2802                                  * If we were a target, and our role shows
2803                                  * we're still a target, cancel the timers
2804                                  * and kick off a scan.
2805                                  */
2806
2807                                 /* was a target, not in roles */
2808                                 if ((rport->scsi_target_id != -1) &&
2809                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2810                                         return rport;
2811
2812                                 /*
2813                                  * Stop the fail io and dev_loss timers.
2814                                  * If they flush, the port_state will
2815                                  * be checked and will NOOP the function.
2816                                  */
2817                                 if (!cancel_delayed_work(&rport->fail_io_work))
2818                                         fc_flush_devloss(shost);
2819                                 if (!cancel_delayed_work(&rport->dev_loss_work))
2820                                         fc_flush_devloss(shost);
2821
2822                                 spin_lock_irqsave(shost->host_lock, flags);
2823
2824                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2825                                                   FC_RPORT_DEVLOSS_PENDING |
2826                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
2827
2828                                 spin_unlock_irqrestore(shost->host_lock, flags);
2829
2830                                 /* if target, initiate a scan */
2831                                 if (rport->scsi_target_id != -1) {
2832                                         scsi_target_unblock(&rport->dev,
2833                                                             SDEV_RUNNING);
2834                                         spin_lock_irqsave(shost->host_lock,
2835                                                           flags);
2836                                         rport->flags |= FC_RPORT_SCAN_PENDING;
2837                                         scsi_queue_work(shost,
2838                                                         &rport->scan_work);
2839                                         spin_unlock_irqrestore(shost->host_lock,
2840                                                         flags);
2841                                 }
2842
2843                                 fc_bsg_goose_queue(rport);
2844
2845                                 return rport;
2846                         }
2847                 }
2848         }
2849
2850         /*
2851          * Search the bindings array
2852          * Note: if never a FCP target, you won't be on this list
2853          */
2854         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2855
2856                 /* search for a matching consistent binding */
2857
2858                 list_for_each_entry(rport, &fc_host->rport_bindings,
2859                                         peers) {
2860                         if (rport->channel != channel)
2861                                 continue;
2862
2863                         switch (fc_host->tgtid_bind_type) {
2864                         case FC_TGTID_BIND_BY_WWPN:
2865                                 if (rport->port_name == ids->port_name)
2866                                         match = 1;
2867                                 break;
2868                         case FC_TGTID_BIND_BY_WWNN:
2869                                 if (rport->node_name == ids->node_name)
2870                                         match = 1;
2871                                 break;
2872                         case FC_TGTID_BIND_BY_ID:
2873                                 if (rport->port_id == ids->port_id)
2874                                         match = 1;
2875                                 break;
2876                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2877                                 break;
2878                         }
2879
2880                         if (match) {
2881                                 list_move_tail(&rport->peers, &fc_host->rports);
2882                                 break;
2883                         }
2884                 }
2885
2886                 if (match) {
2887                         memcpy(&rport->node_name, &ids->node_name,
2888                                 sizeof(rport->node_name));
2889                         memcpy(&rport->port_name, &ids->port_name,
2890                                 sizeof(rport->port_name));
2891                         rport->port_id = ids->port_id;
2892                         rport->roles = ids->roles;
2893                         rport->port_state = FC_PORTSTATE_ONLINE;
2894                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2895
2896                         if (fci->f->dd_fcrport_size)
2897                                 memset(rport->dd_data, 0,
2898                                                 fci->f->dd_fcrport_size);
2899                         spin_unlock_irqrestore(shost->host_lock, flags);
2900
2901                         if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
2902                                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
2903
2904                                 /* initiate a scan of the target */
2905                                 spin_lock_irqsave(shost->host_lock, flags);
2906                                 rport->flags |= FC_RPORT_SCAN_PENDING;
2907                                 scsi_queue_work(shost, &rport->scan_work);
2908                                 spin_unlock_irqrestore(shost->host_lock, flags);
2909                         }
2910                         return rport;
2911                 }
2912         }
2913
2914         spin_unlock_irqrestore(shost->host_lock, flags);
2915
2916         /* No consistent binding found - create new remote port entry */
2917         rport = fc_rport_create(shost, channel, ids);
2918
2919         return rport;
2920 }
2921 EXPORT_SYMBOL(fc_remote_port_add);
2922
2923
2924 /**
2925  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2926  * @rport:      The remote port that no longer exists
2927  *
2928  * The LLDD calls this routine to notify the transport that a remote
2929  * port is no longer part of the topology. Note: Although a port
2930  * may no longer be part of the topology, it may persist in the remote
2931  * ports displayed by the fc_host. We do this under 2 conditions:
2932  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2933  *   This allows the port to temporarily disappear, then reappear without
2934  *   disrupting the SCSI device tree attached to it. During the "blocked"
2935  *   period the port will still exist.
2936  * 2) If the port was a scsi target and disappears for longer than we
2937  *   expect, we'll delete the port and the tear down the SCSI device tree
2938  *   attached to it. However, we want to semi-persist the target id assigned
2939  *   to that port if it eventually does exist. The port structure will
2940  *   remain (although with minimal information) so that the target id
2941  *   bindings remails.
2942  *
2943  * If the remote port is not an FCP Target, it will be fully torn down
2944  * and deallocated, including the fc_remote_port class device.
2945  *
2946  * If the remote port is an FCP Target, the port will be placed in a
2947  * temporary blocked state. From the LLDD's perspective, the rport no
2948  * longer exists. From the SCSI midlayer's perspective, the SCSI target
2949  * exists, but all sdevs on it are blocked from further I/O. The following
2950  * is then expected.
2951  *
2952  *   If the remote port does not return (signaled by a LLDD call to
2953  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2954  *   scsi target is removed - killing all outstanding i/o and removing the
2955  *   scsi devices attached ot it. The port structure will be marked Not
2956  *   Present and be partially cleared, leaving only enough information to
2957  *   recognize the remote port relative to the scsi target id binding if
2958  *   it later appears.  The port will remain as long as there is a valid
2959  *   binding (e.g. until the user changes the binding type or unloads the
2960  *   scsi host with the binding).
2961  *
2962  *   If the remote port returns within the dev_loss_tmo value (and matches
2963  *   according to the target id binding type), the port structure will be
2964  *   reused. If it is no longer a SCSI target, the target will be torn
2965  *   down. If it continues to be a SCSI target, then the target will be
2966  *   unblocked (allowing i/o to be resumed), and a scan will be activated
2967  *   to ensure that all luns are detected.
2968  *
2969  * Called from normal process context only - cannot be called from interrupt.
2970  *
2971  * Notes:
2972  *      This routine assumes no locks are held on entry.
2973  */
2974 void
2975 fc_remote_port_delete(struct fc_rport  *rport)
2976 {
2977         struct Scsi_Host *shost = rport_to_shost(rport);
2978         unsigned long timeout = rport->dev_loss_tmo;
2979         unsigned long flags;
2980
2981         /*
2982          * No need to flush the fc_host work_q's, as all adds are synchronous.
2983          *
2984          * We do need to reclaim the rport scan work element, so eventually
2985          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2986          * there's still a scan pending.
2987          */
2988
2989         spin_lock_irqsave(shost->host_lock, flags);
2990
2991         if (rport->port_state != FC_PORTSTATE_ONLINE) {
2992                 spin_unlock_irqrestore(shost->host_lock, flags);
2993                 return;
2994         }
2995
2996         /*
2997          * In the past, we if this was not an FCP-Target, we would
2998          * unconditionally just jump to deleting the rport.
2999          * However, rports can be used as node containers by the LLDD,
3000          * and its not appropriate to just terminate the rport at the
3001          * first sign of a loss in connectivity. The LLDD may want to
3002          * send ELS traffic to re-validate the login. If the rport is
3003          * immediately deleted, it makes it inappropriate for a node
3004          * container.
3005          * So... we now unconditionally wait dev_loss_tmo before
3006          * destroying an rport.
3007          */
3008
3009         rport->port_state = FC_PORTSTATE_BLOCKED;
3010
3011         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3012
3013         spin_unlock_irqrestore(shost->host_lock, flags);
3014
3015         scsi_target_block(&rport->dev);
3016
3017         /* see if we need to kill io faster than waiting for device loss */
3018         if ((rport->fast_io_fail_tmo != -1) &&
3019             (rport->fast_io_fail_tmo < timeout))
3020                 fc_queue_devloss_work(shost, &rport->fail_io_work,
3021                                         rport->fast_io_fail_tmo * HZ);
3022
3023         /* cap the length the devices can be blocked until they are deleted */
3024         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3025 }
3026 EXPORT_SYMBOL(fc_remote_port_delete);
3027
3028 /**
3029  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3030  * @rport:      The remote port that changed.
3031  * @roles:      New roles for this port.
3032  *
3033  * Description: The LLDD calls this routine to notify the transport that the
3034  * roles on a remote port may have changed. The largest effect of this is
3035  * if a port now becomes a FCP Target, it must be allocated a
3036  * scsi target id.  If the port is no longer a FCP target, any
3037  * scsi target id value assigned to it will persist in case the
3038  * role changes back to include FCP Target. No changes in the scsi
3039  * midlayer will be invoked if the role changes (in the expectation
3040  * that the role will be resumed. If it doesn't normal error processing
3041  * will take place).
3042  *
3043  * Should not be called from interrupt context.
3044  *
3045  * Notes:
3046  *      This routine assumes no locks are held on entry.
3047  */
3048 void
3049 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3050 {
3051         struct Scsi_Host *shost = rport_to_shost(rport);
3052         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3053         unsigned long flags;
3054         int create = 0;
3055
3056         spin_lock_irqsave(shost->host_lock, flags);
3057         if (roles & FC_PORT_ROLE_FCP_TARGET) {
3058                 if (rport->scsi_target_id == -1) {
3059                         rport->scsi_target_id = fc_host->next_target_id++;
3060                         create = 1;
3061                 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3062                         create = 1;
3063         }
3064
3065         rport->roles = roles;
3066
3067         spin_unlock_irqrestore(shost->host_lock, flags);
3068
3069         if (create) {
3070                 /*
3071                  * There may have been a delete timer running on the
3072                  * port. Ensure that it is cancelled as we now know
3073                  * the port is an FCP Target.
3074                  * Note: we know the rport is exists and in an online
3075                  *  state as the LLDD would not have had an rport
3076                  *  reference to pass us.
3077                  *
3078                  * Take no action on the del_timer failure as the state
3079                  * machine state change will validate the
3080                  * transaction.
3081                  */
3082                 if (!cancel_delayed_work(&rport->fail_io_work))
3083                         fc_flush_devloss(shost);
3084                 if (!cancel_delayed_work(&rport->dev_loss_work))
3085                         fc_flush_devloss(shost);
3086
3087                 spin_lock_irqsave(shost->host_lock, flags);
3088                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3089                                   FC_RPORT_DEVLOSS_PENDING |
3090                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3091                 spin_unlock_irqrestore(shost->host_lock, flags);
3092
3093                 /* ensure any stgt delete functions are done */
3094                 fc_flush_work(shost);
3095
3096                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3097                 /* initiate a scan of the target */
3098                 spin_lock_irqsave(shost->host_lock, flags);
3099                 rport->flags |= FC_RPORT_SCAN_PENDING;
3100                 scsi_queue_work(shost, &rport->scan_work);
3101                 spin_unlock_irqrestore(shost->host_lock, flags);
3102         }
3103 }
3104 EXPORT_SYMBOL(fc_remote_port_rolechg);
3105
3106 /**
3107  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3108  * @work:       rport target that failed to reappear in the allotted time.
3109  *
3110  * Description: An attempt to delete a remote port blocks, and if it fails
3111  *              to return in the allotted time this gets called.
3112  */
3113 static void
3114 fc_timeout_deleted_rport(struct work_struct *work)
3115 {
3116         struct fc_rport *rport =
3117                 container_of(work, struct fc_rport, dev_loss_work.work);
3118         struct Scsi_Host *shost = rport_to_shost(rport);
3119         struct fc_internal *i = to_fc_internal(shost->transportt);
3120         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3121         unsigned long flags;
3122         int do_callback = 0;
3123
3124         spin_lock_irqsave(shost->host_lock, flags);
3125
3126         rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3127
3128         /*
3129          * If the port is ONLINE, then it came back. If it was a SCSI
3130          * target, validate it still is. If not, tear down the
3131          * scsi_target on it.
3132          */
3133         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3134             (rport->scsi_target_id != -1) &&
3135             !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3136                 dev_printk(KERN_ERR, &rport->dev,
3137                         "blocked FC remote port time out: no longer"
3138                         " a FCP target, removing starget\n");
3139                 spin_unlock_irqrestore(shost->host_lock, flags);
3140                 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3141                 fc_queue_work(shost, &rport->stgt_delete_work);
3142                 return;
3143         }
3144
3145         /* NOOP state - we're flushing workq's */
3146         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3147                 spin_unlock_irqrestore(shost->host_lock, flags);
3148                 dev_printk(KERN_ERR, &rport->dev,
3149                         "blocked FC remote port time out: leaving"
3150                         " rport%s alone\n",
3151                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3152                 return;
3153         }
3154
3155         if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3156             (rport->scsi_target_id == -1)) {
3157                 list_del(&rport->peers);
3158                 rport->port_state = FC_PORTSTATE_DELETED;
3159                 dev_printk(KERN_ERR, &rport->dev,
3160                         "blocked FC remote port time out: removing"
3161                         " rport%s\n",
3162                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3163                 fc_queue_work(shost, &rport->rport_delete_work);
3164                 spin_unlock_irqrestore(shost->host_lock, flags);
3165                 return;
3166         }
3167
3168         dev_printk(KERN_ERR, &rport->dev,
3169                 "blocked FC remote port time out: removing target and "
3170                 "saving binding\n");
3171
3172         list_move_tail(&rport->peers, &fc_host->rport_bindings);
3173
3174         /*
3175          * Note: We do not remove or clear the hostdata area. This allows
3176          *   host-specific target data to persist along with the
3177          *   scsi_target_id. It's up to the host to manage it's hostdata area.
3178          */
3179
3180         /*
3181          * Reinitialize port attributes that may change if the port comes back.
3182          */
3183         rport->maxframe_size = -1;
3184         rport->supported_classes = FC_COS_UNSPECIFIED;
3185         rport->roles = FC_PORT_ROLE_UNKNOWN;
3186         rport->port_state = FC_PORTSTATE_NOTPRESENT;
3187         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3188
3189         /*
3190          * Pre-emptively kill I/O rather than waiting for the work queue
3191          * item to teardown the starget. (FCOE libFC folks prefer this
3192          * and to have the rport_port_id still set when it's done).
3193          */
3194         spin_unlock_irqrestore(shost->host_lock, flags);
3195         fc_terminate_rport_io(rport);
3196
3197         spin_lock_irqsave(shost->host_lock, flags);
3198
3199         if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {     /* still missing */
3200
3201                 /* remove the identifiers that aren't used in the consisting binding */
3202                 switch (fc_host->tgtid_bind_type) {
3203                 case FC_TGTID_BIND_BY_WWPN:
3204                         rport->node_name = -1;
3205                         rport->port_id = -1;
3206                         break;
3207                 case FC_TGTID_BIND_BY_WWNN:
3208                         rport->port_name = -1;
3209                         rport->port_id = -1;
3210                         break;
3211                 case FC_TGTID_BIND_BY_ID:
3212                         rport->node_name = -1;
3213                         rport->port_name = -1;
3214                         break;
3215                 case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
3216                         break;
3217                 }
3218
3219                 /*
3220                  * As this only occurs if the remote port (scsi target)
3221                  * went away and didn't come back - we'll remove
3222                  * all attached scsi devices.
3223                  */
3224                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3225                 fc_queue_work(shost, &rport->stgt_delete_work);
3226
3227                 do_callback = 1;
3228         }
3229
3230         spin_unlock_irqrestore(shost->host_lock, flags);
3231
3232         /*
3233          * Notify the driver that the rport is now dead. The LLDD will
3234          * also guarantee that any communication to the rport is terminated
3235          *
3236          * Note: we set the CALLBK_DONE flag above to correspond
3237          */
3238         if (do_callback && i->f->dev_loss_tmo_callbk)
3239                 i->f->dev_loss_tmo_callbk(rport);
3240 }
3241
3242
3243 /**
3244  * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3245  * @work:       rport to terminate io on.
3246  *
3247  * Notes: Only requests the failure of the io, not that all are flushed
3248  *    prior to returning.
3249  */
3250 static void
3251 fc_timeout_fail_rport_io(struct work_struct *work)
3252 {
3253         struct fc_rport *rport =
3254                 container_of(work, struct fc_rport, fail_io_work.work);
3255
3256         if (rport->port_state != FC_PORTSTATE_BLOCKED)
3257                 return;
3258
3259         rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3260         fc_terminate_rport_io(rport);
3261 }
3262
3263 /**
3264  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3265  * @work:       remote port to be scanned.
3266  */
3267 static void
3268 fc_scsi_scan_rport(struct work_struct *work)
3269 {
3270         struct fc_rport *rport =
3271                 container_of(work, struct fc_rport, scan_work);
3272         struct Scsi_Host *shost = rport_to_shost(rport);
3273         struct fc_internal *i = to_fc_internal(shost->transportt);
3274         unsigned long flags;
3275
3276         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3277             (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3278             !(i->f->disable_target_scan)) {
3279                 scsi_scan_target(&rport->dev, rport->channel,
3280                                  rport->scsi_target_id, SCAN_WILD_CARD,
3281                                  SCSI_SCAN_RESCAN);
3282         }
3283
3284         spin_lock_irqsave(shost->host_lock, flags);
3285         rport->flags &= ~FC_RPORT_SCAN_PENDING;
3286         spin_unlock_irqrestore(shost->host_lock, flags);
3287 }
3288
3289 /**
3290  * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3291  * @cmnd: SCSI command that scsi_eh is trying to recover
3292  *
3293  * This routine can be called from a FC LLD scsi_eh callback. It
3294  * blocks the scsi_eh thread until the fc_rport leaves the
3295  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3296  * necessary to avoid the scsi_eh failing recovery actions for blocked
3297  * rports which would lead to offlined SCSI devices.
3298  *
3299  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3300  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3301  *          passed back to scsi_eh.
3302  */
3303 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3304 {
3305         struct Scsi_Host *shost = cmnd->device->host;
3306         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3307         unsigned long flags;
3308
3309         spin_lock_irqsave(shost->host_lock, flags);
3310         while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3311                !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3312                 spin_unlock_irqrestore(shost->host_lock, flags);
3313                 msleep(1000);
3314                 spin_lock_irqsave(shost->host_lock, flags);
3315         }
3316         spin_unlock_irqrestore(shost->host_lock, flags);
3317
3318         if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3319                 return FAST_IO_FAIL;
3320
3321         return 0;
3322 }
3323 EXPORT_SYMBOL(fc_block_scsi_eh);
3324
3325 /**
3326  * fc_vport_setup - allocates and creates a FC virtual port.
3327  * @shost:      scsi host the virtual port is connected to.
3328  * @channel:    Channel on shost port connected to.
3329  * @pdev:       parent device for vport
3330  * @ids:        The world wide names, FC4 port roles, etc for
3331  *              the virtual port.
3332  * @ret_vport:  The pointer to the created vport.
3333  *
3334  * Allocates and creates the vport structure, calls the parent host
3335  * to instantiate the vport, the completes w/ class and sysfs creation.
3336  *
3337  * Notes:
3338  *      This routine assumes no locks are held on entry.
3339  */
3340 static int
3341 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3342         struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
3343 {
3344         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3345         struct fc_internal *fci = to_fc_internal(shost->transportt);
3346         struct fc_vport *vport;
3347         struct device *dev;
3348         unsigned long flags;
3349         size_t size;
3350         int error;
3351
3352         *ret_vport = NULL;
3353
3354         if ( ! fci->f->vport_create)
3355                 return -ENOENT;
3356
3357         size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3358         vport = kzalloc(size, GFP_KERNEL);
3359         if (unlikely(!vport)) {
3360                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3361                 return -ENOMEM;
3362         }
3363
3364         vport->vport_state = FC_VPORT_UNKNOWN;
3365         vport->vport_last_state = FC_VPORT_UNKNOWN;
3366         vport->node_name = ids->node_name;
3367         vport->port_name = ids->port_name;
3368         vport->roles = ids->roles;
3369         vport->vport_type = ids->vport_type;
3370         if (fci->f->dd_fcvport_size)
3371                 vport->dd_data = &vport[1];
3372         vport->shost = shost;
3373         vport->channel = channel;
3374         vport->flags = FC_VPORT_CREATING;
3375         INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3376
3377         spin_lock_irqsave(shost->host_lock, flags);
3378
3379         if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3380                 spin_unlock_irqrestore(shost->host_lock, flags);
3381                 kfree(vport);
3382                 return -ENOSPC;
3383         }
3384         fc_host->npiv_vports_inuse++;
3385         vport->number = fc_host->next_vport_number++;
3386         list_add_tail(&vport->peers, &fc_host->vports);
3387         scsi_host_get(shost);                   /* for fc_host->vport list */
3388
3389         spin_unlock_irqrestore(shost->host_lock, flags);
3390
3391         dev = &vport->dev;
3392         device_initialize(dev);                 /* takes self reference */
3393         dev->parent = get_device(pdev);         /* takes parent reference */
3394         dev->release = fc_vport_dev_release;
3395         dev_set_name(dev, "vport-%d:%d-%d",
3396                      shost->host_no, channel, vport->number);
3397         transport_setup_device(dev);
3398
3399         error = device_add(dev);
3400         if (error) {
3401                 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3402                 goto delete_vport;
3403         }
3404         transport_add_device(dev);
3405         transport_configure_device(dev);
3406
3407         error = fci->f->vport_create(vport, ids->disable);
3408         if (error) {
3409                 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3410                 goto delete_vport_all;
3411         }
3412
3413         /*
3414          * if the parent isn't the physical adapter's Scsi_Host, ensure
3415          * the Scsi_Host at least contains ia symlink to the vport.
3416          */
3417         if (pdev != &shost->shost_gendev) {
3418                 error = sysfs_create_link(&shost->shost_gendev.kobj,
3419                                  &dev->kobj, dev_name(dev));
3420                 if (error)
3421                         printk(KERN_ERR
3422                                 "%s: Cannot create vport symlinks for "
3423                                 "%s, err=%d\n",
3424                                 __func__, dev_name(dev), error);
3425         }
3426         spin_lock_irqsave(shost->host_lock, flags);
3427         vport->flags &= ~FC_VPORT_CREATING;
3428         spin_unlock_irqrestore(shost->host_lock, flags);
3429
3430         dev_printk(KERN_NOTICE, pdev,
3431                         "%s created via shost%d channel %d\n", dev_name(dev),
3432                         shost->host_no, channel);
3433
3434         *ret_vport = vport;
3435
3436         return 0;
3437
3438 delete_vport_all:
3439         transport_remove_device(dev);
3440         device_del(dev);
3441 delete_vport:
3442         transport_destroy_device(dev);
3443         spin_lock_irqsave(shost->host_lock, flags);
3444         list_del(&vport->peers);
3445         scsi_host_put(shost);                   /* for fc_host->vport list */
3446         fc_host->npiv_vports_inuse--;
3447         spin_unlock_irqrestore(shost->host_lock, flags);
3448         put_device(dev->parent);
3449         kfree(vport);
3450
3451         return error;
3452 }
3453
3454 /**
3455  * fc_vport_create - Admin App or LLDD requests creation of a vport
3456  * @shost:      scsi host the virtual port is connected to.
3457  * @channel:    channel on shost port connected to.
3458  * @ids:        The world wide names, FC4 port roles, etc for
3459  *              the virtual port.
3460  *
3461  * Notes:
3462  *      This routine assumes no locks are held on entry.
3463  */
3464 struct fc_vport *
3465 fc_vport_create(struct Scsi_Host *shost, int channel,
3466         struct fc_vport_identifiers *ids)
3467 {
3468         int stat;
3469         struct fc_vport *vport;
3470
3471         stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3472                  ids, &vport);
3473         return stat ? NULL : vport;
3474 }
3475 EXPORT_SYMBOL(fc_vport_create);
3476
3477 /**
3478  * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3479  * @vport:      fc_vport to be terminated
3480  *
3481  * Calls the LLDD vport_delete() function, then deallocates and removes
3482  * the vport from the shost and object tree.
3483  *
3484  * Notes:
3485  *      This routine assumes no locks are held on entry.
3486  */
3487 int
3488 fc_vport_terminate(struct fc_vport *vport)
3489 {
3490         struct Scsi_Host *shost = vport_to_shost(vport);
3491         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3492         struct fc_internal *i = to_fc_internal(shost->transportt);
3493         struct device *dev = &vport->dev;
3494         unsigned long flags;
3495         int stat;
3496
3497         if (i->f->vport_delete)
3498                 stat = i->f->vport_delete(vport);
3499         else
3500                 stat = -ENOENT;
3501
3502         spin_lock_irqsave(shost->host_lock, flags);
3503         vport->flags &= ~FC_VPORT_DELETING;
3504         if (!stat) {
3505                 vport->flags |= FC_VPORT_DELETED;
3506                 list_del(&vport->peers);
3507                 fc_host->npiv_vports_inuse--;
3508                 scsi_host_put(shost);           /* for fc_host->vport list */
3509         }
3510         spin_unlock_irqrestore(shost->host_lock, flags);
3511
3512         if (stat)
3513                 return stat;
3514
3515         if (dev->parent != &shost->shost_gendev)
3516                 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3517         transport_remove_device(dev);
3518         device_del(dev);
3519         transport_destroy_device(dev);
3520
3521         /*
3522          * Removing our self-reference should mean our
3523          * release function gets called, which will drop the remaining
3524          * parent reference and free the data structure.
3525          */
3526         put_device(dev);                        /* for self-reference */
3527
3528         return 0; /* SUCCESS */
3529 }
3530 EXPORT_SYMBOL(fc_vport_terminate);
3531
3532 /**
3533  * fc_vport_sched_delete - workq-based delete request for a vport
3534  * @work:       vport to be deleted.
3535  */
3536 static void
3537 fc_vport_sched_delete(struct work_struct *work)
3538 {
3539         struct fc_vport *vport =
3540                 container_of(work, struct fc_vport, vport_delete_work);
3541         int stat;
3542
3543         stat = fc_vport_terminate(vport);
3544         if (stat)
3545                 dev_printk(KERN_ERR, vport->dev.parent,
3546                         "%s: %s could not be deleted created via "
3547                         "shost%d channel %d - error %d\n", __func__,
3548                         dev_name(&vport->dev), vport->shost->host_no,
3549                         vport->channel, stat);
3550 }
3551
3552
3553 /*
3554  * BSG support
3555  */
3556
3557
3558 /**
3559  * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3560  * @job:        fc_bsg_job that is to be torn down
3561  */
3562 static void
3563 fc_destroy_bsgjob(struct fc_bsg_job *job)
3564 {
3565         unsigned long flags;
3566
3567         spin_lock_irqsave(&job->job_lock, flags);
3568         if (job->ref_cnt) {
3569                 spin_unlock_irqrestore(&job->job_lock, flags);
3570                 return;
3571         }
3572         spin_unlock_irqrestore(&job->job_lock, flags);
3573
3574         put_device(job->dev);   /* release reference for the request */
3575
3576         kfree(job->request_payload.sg_list);
3577         kfree(job->reply_payload.sg_list);
3578         kfree(job);
3579 }
3580
3581 /**
3582  * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3583  *                  completed
3584  * @job:        fc_bsg_job that is complete
3585  */
3586 static void
3587 fc_bsg_jobdone(struct fc_bsg_job *job)
3588 {
3589         struct request *req = job->req;
3590         struct request *rsp = req->next_rq;
3591         int err;
3592
3593         err = job->req->errors = job->reply->result;
3594
3595         if (err < 0)
3596                 /* we're only returning the result field in the reply */
3597                 job->req->sense_len = sizeof(uint32_t);
3598         else
3599                 job->req->sense_len = job->reply_len;
3600
3601         /* we assume all request payload was transferred, residual == 0 */
3602         req->resid_len = 0;
3603
3604         if (rsp) {
3605                 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3606
3607                 /* set reply (bidi) residual */
3608                 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3609                                       rsp->resid_len);
3610         }
3611         blk_complete_request(req);
3612 }
3613
3614 /**
3615  * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3616  * @rq:        BSG request that holds the job to be destroyed
3617  */
3618 static void fc_bsg_softirq_done(struct request *rq)
3619 {
3620         struct fc_bsg_job *job = rq->special;
3621         unsigned long flags;
3622
3623         spin_lock_irqsave(&job->job_lock, flags);
3624         job->state_flags |= FC_RQST_STATE_DONE;
3625         job->ref_cnt--;
3626         spin_unlock_irqrestore(&job->job_lock, flags);
3627
3628         blk_end_request_all(rq, rq->errors);
3629         fc_destroy_bsgjob(job);
3630 }
3631
3632 /**
3633  * fc_bsg_job_timeout - handler for when a bsg request timesout
3634  * @req:        request that timed out
3635  */
3636 static enum blk_eh_timer_return
3637 fc_bsg_job_timeout(struct request *req)
3638 {
3639         struct fc_bsg_job *job = (void *) req->special;
3640         struct Scsi_Host *shost = job->shost;
3641         struct fc_internal *i = to_fc_internal(shost->transportt);
3642         unsigned long flags;
3643         int err = 0, done = 0;
3644
3645         if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3646                 return BLK_EH_RESET_TIMER;
3647
3648         spin_lock_irqsave(&job->job_lock, flags);
3649         if (job->state_flags & FC_RQST_STATE_DONE)
3650                 done = 1;
3651         else
3652                 job->ref_cnt++;
3653         spin_unlock_irqrestore(&job->job_lock, flags);
3654
3655         if (!done && i->f->bsg_timeout) {
3656                 /* call LLDD to abort the i/o as it has timed out */
3657                 err = i->f->bsg_timeout(job);
3658                 if (err == -EAGAIN) {
3659                         job->ref_cnt--;
3660                         return BLK_EH_RESET_TIMER;
3661                 } else if (err)
3662                         printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3663                                 "abort failed with status %d\n", err);
3664         }
3665
3666         /* the blk_end_sync_io() doesn't check the error */
3667         if (done)
3668                 return BLK_EH_NOT_HANDLED;
3669         else
3670                 return BLK_EH_HANDLED;
3671 }
3672
3673 static int
3674 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3675 {
3676         size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3677
3678         BUG_ON(!req->nr_phys_segments);
3679
3680         buf->sg_list = kzalloc(sz, GFP_KERNEL);
3681         if (!buf->sg_list)
3682                 return -ENOMEM;
3683         sg_init_table(buf->sg_list, req->nr_phys_segments);
3684         buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3685         buf->payload_len = blk_rq_bytes(req);
3686         return 0;
3687 }
3688
3689
3690 /**
3691  * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3692  *                   bsg request
3693  * @shost:      SCSI Host corresponding to the bsg object
3694  * @rport:      (optional) FC Remote Port corresponding to the bsg object
3695  * @req:        BSG request that needs a job structure
3696  */
3697 static int
3698 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3699         struct request *req)
3700 {
3701         struct fc_internal *i = to_fc_internal(shost->transportt);
3702         struct request *rsp = req->next_rq;
3703         struct fc_bsg_job *job;
3704         int ret;
3705
3706         BUG_ON(req->special);
3707
3708         job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3709                         GFP_KERNEL);
3710         if (!job)
3711                 return -ENOMEM;
3712
3713         /*
3714          * Note: this is a bit silly.
3715          * The request gets formatted as a SGIO v4 ioctl request, which
3716          * then gets reformatted as a blk request, which then gets
3717          * reformatted as a fc bsg request. And on completion, we have
3718          * to wrap return results such that SGIO v4 thinks it was a scsi
3719          * status.  I hope this was all worth it.
3720          */
3721
3722         req->special = job;
3723         job->shost = shost;
3724         job->rport = rport;
3725         job->req = req;
3726         if (i->f->dd_bsg_size)
3727                 job->dd_data = (void *)&job[1];
3728         spin_lock_init(&job->job_lock);
3729         job->request = (struct fc_bsg_request *)req->cmd;
3730         job->request_len = req->cmd_len;
3731         job->reply = req->sense;
3732         job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3733                                                  * allocated */
3734         if (req->bio) {
3735                 ret = fc_bsg_map_buffer(&job->request_payload, req);
3736                 if (ret)
3737                         goto failjob_rls_job;
3738         }
3739         if (rsp && rsp->bio) {
3740                 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3741                 if (ret)
3742                         goto failjob_rls_rqst_payload;
3743         }
3744         job->job_done = fc_bsg_jobdone;
3745         if (rport)
3746                 job->dev = &rport->dev;
3747         else
3748                 job->dev = &shost->shost_gendev;
3749         get_device(job->dev);           /* take a reference for the request */
3750
3751         job->ref_cnt = 1;
3752
3753         return 0;
3754
3755
3756 failjob_rls_rqst_payload:
3757         kfree(job->request_payload.sg_list);
3758 failjob_rls_job:
3759         kfree(job);
3760         return -ENOMEM;
3761 }
3762
3763
3764 enum fc_dispatch_result {
3765         FC_DISPATCH_BREAK,      /* on return, q is locked, break from q loop */
3766         FC_DISPATCH_LOCKED,     /* on return, q is locked, continue on */
3767         FC_DISPATCH_UNLOCKED,   /* on return, q is unlocked, continue on */
3768 };
3769
3770
3771 /**
3772  * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3773  * @q:          fc host request queue
3774  * @shost:      scsi host rport attached to
3775  * @job:        bsg job to be processed
3776  */
3777 static enum fc_dispatch_result
3778 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3779                          struct fc_bsg_job *job)
3780 {
3781         struct fc_internal *i = to_fc_internal(shost->transportt);
3782         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3783         int ret;
3784
3785         /* Validate the host command */
3786         switch (job->request->msgcode) {
3787         case FC_BSG_HST_ADD_RPORT:
3788                 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3789                 break;
3790
3791         case FC_BSG_HST_DEL_RPORT:
3792                 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3793                 break;
3794
3795         case FC_BSG_HST_ELS_NOLOGIN:
3796                 cmdlen += sizeof(struct fc_bsg_host_els);
3797                 /* there better be a xmt and rcv payloads */
3798                 if ((!job->request_payload.payload_len) ||
3799                     (!job->reply_payload.payload_len)) {
3800                         ret = -EINVAL;
3801                         goto fail_host_msg;
3802                 }
3803                 break;
3804
3805         case FC_BSG_HST_CT:
3806                 cmdlen += sizeof(struct fc_bsg_host_ct);
3807                 /* there better be xmt and rcv payloads */
3808                 if ((!job->request_payload.payload_len) ||
3809                     (!job->reply_payload.payload_len)) {
3810                         ret = -EINVAL;
3811                         goto fail_host_msg;
3812                 }
3813                 break;
3814
3815         case FC_BSG_HST_VENDOR:
3816                 cmdlen += sizeof(struct fc_bsg_host_vendor);
3817                 if ((shost->hostt->vendor_id == 0L) ||
3818                     (job->request->rqst_data.h_vendor.vendor_id !=
3819                         shost->hostt->vendor_id)) {
3820                         ret = -ESRCH;
3821                         goto fail_host_msg;
3822                 }
3823                 break;
3824
3825         default:
3826                 ret = -EBADR;
3827                 goto fail_host_msg;
3828         }
3829
3830         /* check if we really have all the request data needed */
3831         if (job->request_len < cmdlen) {
3832                 ret = -ENOMSG;
3833                 goto fail_host_msg;
3834         }
3835
3836         ret = i->f->bsg_request(job);
3837         if (!ret)
3838                 return FC_DISPATCH_UNLOCKED;
3839
3840 fail_host_msg:
3841         /* return the errno failure code as the only status */
3842         BUG_ON(job->reply_len < sizeof(uint32_t));
3843         job->reply->reply_payload_rcv_len = 0;
3844         job->reply->result = ret;
3845         job->reply_len = sizeof(uint32_t);
3846         fc_bsg_jobdone(job);
3847         return FC_DISPATCH_UNLOCKED;
3848 }
3849
3850
3851 /*
3852  * fc_bsg_goose_queue - restart rport queue in case it was stopped
3853  * @rport:      rport to be restarted
3854  */
3855 static void
3856 fc_bsg_goose_queue(struct fc_rport *rport)
3857 {
3858         if (!rport->rqst_q)
3859                 return;
3860
3861         /*
3862          * This get/put dance makes no sense
3863          */
3864         get_device(&rport->dev);
3865         blk_run_queue_async(rport->rqst_q);
3866         put_device(&rport->dev);
3867 }
3868
3869 /**
3870  * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3871  * @q:          rport request queue
3872  * @shost:      scsi host rport attached to
3873  * @rport:      rport request destined to
3874  * @job:        bsg job to be processed
3875  */
3876 static enum fc_dispatch_result
3877 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3878                          struct fc_rport *rport, struct fc_bsg_job *job)
3879 {
3880         struct fc_internal *i = to_fc_internal(shost->transportt);
3881         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3882         int ret;
3883
3884         /* Validate the rport command */
3885         switch (job->request->msgcode) {
3886         case FC_BSG_RPT_ELS:
3887                 cmdlen += sizeof(struct fc_bsg_rport_els);
3888                 goto check_bidi;
3889
3890         case FC_BSG_RPT_CT:
3891                 cmdlen += sizeof(struct fc_bsg_rport_ct);
3892 check_bidi:
3893                 /* there better be xmt and rcv payloads */
3894                 if ((!job->request_payload.payload_len) ||
3895                     (!job->reply_payload.payload_len)) {
3896                         ret = -EINVAL;
3897                         goto fail_rport_msg;
3898                 }
3899                 break;
3900         default:
3901                 ret = -EBADR;
3902                 goto fail_rport_msg;
3903         }
3904
3905         /* check if we really have all the request data needed */
3906         if (job->request_len < cmdlen) {
3907                 ret = -ENOMSG;
3908                 goto fail_rport_msg;
3909         }
3910
3911         ret = i->f->bsg_request(job);
3912         if (!ret)
3913                 return FC_DISPATCH_UNLOCKED;
3914
3915 fail_rport_msg:
3916         /* return the errno failure code as the only status */
3917         BUG_ON(job->reply_len < sizeof(uint32_t));
3918         job->reply->reply_payload_rcv_len = 0;
3919         job->reply->result = ret;
3920         job->reply_len = sizeof(uint32_t);
3921         fc_bsg_jobdone(job);
3922         return FC_DISPATCH_UNLOCKED;
3923 }
3924
3925
3926 /**
3927  * fc_bsg_request_handler - generic handler for bsg requests
3928  * @q:          request queue to manage
3929  * @shost:      Scsi_Host related to the bsg object
3930  * @rport:      FC remote port related to the bsg object (optional)
3931  * @dev:        device structure for bsg object
3932  */
3933 static void
3934 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3935                        struct fc_rport *rport, struct device *dev)
3936 {
3937         struct request *req;
3938         struct fc_bsg_job *job;
3939         enum fc_dispatch_result ret;
3940
3941         if (!get_device(dev))
3942                 return;
3943
3944         while (1) {
3945                 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3946                     !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3947                         break;
3948
3949                 req = blk_fetch_request(q);
3950                 if (!req)
3951                         break;
3952
3953                 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3954                         req->errors = -ENXIO;
3955                         spin_unlock_irq(q->queue_lock);
3956                         blk_end_request_all(req, -ENXIO);
3957                         spin_lock_irq(q->queue_lock);
3958                         continue;
3959                 }
3960
3961                 spin_unlock_irq(q->queue_lock);
3962
3963                 ret = fc_req_to_bsgjob(shost, rport, req);
3964                 if (ret) {
3965                         req->errors = ret;
3966                         blk_end_request_all(req, ret);
3967                         spin_lock_irq(q->queue_lock);
3968                         continue;
3969                 }
3970
3971                 job = req->special;
3972
3973                 /* check if we have the msgcode value at least */
3974                 if (job->request_len < sizeof(uint32_t)) {
3975                         BUG_ON(job->reply_len < sizeof(uint32_t));
3976                         job->reply->reply_payload_rcv_len = 0;
3977                         job->reply->result = -ENOMSG;
3978                         job->reply_len = sizeof(uint32_t);
3979                         fc_bsg_jobdone(job);
3980                         spin_lock_irq(q->queue_lock);
3981                         continue;
3982                 }
3983
3984                 /* the dispatch routines will unlock the queue_lock */
3985                 if (rport)
3986                         ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3987                 else
3988                         ret = fc_bsg_host_dispatch(q, shost, job);
3989
3990                 /* did dispatcher hit state that can't process any more */
3991                 if (ret == FC_DISPATCH_BREAK)
3992                         break;
3993
3994                 /* did dispatcher had released the lock */
3995                 if (ret == FC_DISPATCH_UNLOCKED)
3996                         spin_lock_irq(q->queue_lock);
3997         }
3998
3999         spin_unlock_irq(q->queue_lock);
4000         put_device(dev);
4001         spin_lock_irq(q->queue_lock);
4002 }
4003
4004
4005 /**
4006  * fc_bsg_host_handler - handler for bsg requests for a fc host
4007  * @q:          fc host request queue
4008  */
4009 static void
4010 fc_bsg_host_handler(struct request_queue *q)
4011 {
4012         struct Scsi_Host *shost = q->queuedata;
4013
4014         fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
4015 }
4016
4017
4018 /**
4019  * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4020  * @q:          rport request queue
4021  */
4022 static void
4023 fc_bsg_rport_handler(struct request_queue *q)
4024 {
4025         struct fc_rport *rport = q->queuedata;
4026         struct Scsi_Host *shost = rport_to_shost(rport);
4027
4028         fc_bsg_request_handler(q, shost, rport, &rport->dev);
4029 }
4030
4031
4032 /**
4033  * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4034  * @shost:      shost for fc_host
4035  * @fc_host:    fc_host adding the structures to
4036  */
4037 static int
4038 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4039 {
4040         struct device *dev = &shost->shost_gendev;
4041         struct fc_internal *i = to_fc_internal(shost->transportt);
4042         struct request_queue *q;
4043         int err;
4044         char bsg_name[20];
4045
4046         fc_host->rqst_q = NULL;
4047
4048         if (!i->f->bsg_request)
4049                 return -ENOTSUPP;
4050
4051         snprintf(bsg_name, sizeof(bsg_name),
4052                  "fc_host%d", shost->host_no);
4053
4054         q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4055         if (!q) {
4056                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4057                                 "initialize - no request queue\n",
4058                                  shost->host_no);
4059                 return -ENOMEM;
4060         }
4061
4062         q->queuedata = shost;
4063         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4064         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4065         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4066         blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4067
4068         err = bsg_register_queue(q, dev, bsg_name, NULL);
4069         if (err) {
4070                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4071                                 "initialize - register queue\n",
4072                                 shost->host_no);
4073                 blk_cleanup_queue(q);
4074                 return err;
4075         }
4076
4077         fc_host->rqst_q = q;
4078         return 0;
4079 }
4080
4081
4082 /**
4083  * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4084  * @shost:      shost that rport is attached to
4085  * @rport:      rport that the bsg hooks are being attached to
4086  */
4087 static int
4088 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4089 {
4090         struct device *dev = &rport->dev;
4091         struct fc_internal *i = to_fc_internal(shost->transportt);
4092         struct request_queue *q;
4093         int err;
4094
4095         rport->rqst_q = NULL;
4096
4097         if (!i->f->bsg_request)
4098                 return -ENOTSUPP;
4099
4100         q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4101         if (!q) {
4102                 printk(KERN_ERR "%s: bsg interface failed to "
4103                                 "initialize - no request queue\n",
4104                                  dev->kobj.name);
4105                 return -ENOMEM;
4106         }
4107
4108         q->queuedata = rport;
4109         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4110         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4111         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4112         blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4113
4114         err = bsg_register_queue(q, dev, NULL, NULL);
4115         if (err) {
4116                 printk(KERN_ERR "%s: bsg interface failed to "
4117                                 "initialize - register queue\n",
4118                                  dev->kobj.name);
4119                 blk_cleanup_queue(q);
4120                 return err;
4121         }
4122
4123         rport->rqst_q = q;
4124         return 0;
4125 }
4126
4127
4128 /**
4129  * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4130  * @q:  the request_queue that is to be torn down.
4131  *
4132  * Notes:
4133  *   Before unregistering the queue empty any requests that are blocked
4134  *
4135  *
4136  */
4137 static void
4138 fc_bsg_remove(struct request_queue *q)
4139 {
4140         if (q) {
4141                 bsg_unregister_queue(q);
4142                 blk_cleanup_queue(q);
4143         }
4144 }
4145
4146
4147 /* Original Author:  Martin Hicks */
4148 MODULE_AUTHOR("James Smart");
4149 MODULE_DESCRIPTION("FC Transport Attributes");
4150 MODULE_LICENSE("GPL");
4151
4152 module_init(fc_transport_init);
4153 module_exit(fc_transport_exit);