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 <linux/bsg-lib.h>
  34 #include <scsi/scsi_device.h>
  35 #include <scsi/scsi_host.h>
  36 #include <scsi/scsi_transport.h>
  37 #include <scsi/scsi_transport_fc.h>
  38 #include <scsi/scsi_cmnd.h>
  39 #include <net/netlink.h>
  40 #include <scsi/scsi_netlink_fc.h>
  41 #include <scsi/scsi_bsg_fc.h>
  42 #include "scsi_priv.h"
  43
  44 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
  45 static void fc_vport_sched_delete(struct work_struct *work);
  46 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
  47         struct device *pdev, struct fc_vport_identifiers  *ids,
  48         struct fc_vport **vport);
  49 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
  50 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
  51 static void fc_bsg_remove(struct request_queue *);
  52 static void fc_bsg_goose_queue(struct fc_rport *);
  53
  54 /*
  55  * Module Parameters
  56  */
  57
  58 /*
  59  * dev_loss_tmo: the default number of seconds that the FC transport
  60  *   should insulate the loss of a remote port.
  61  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
  62  */
  63 static unsigned int fc_dev_loss_tmo = 60;               /* seconds */
  64
  65 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
  66 MODULE_PARM_DESC(dev_loss_tmo,
  67                  "Maximum number of seconds that the FC transport should"
  68                  " insulate the loss of a remote port. Once this value is"
  69                  " exceeded, the scsi target is removed. Value should be"
  70                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
  71                  " fast_io_fail_tmo is not set.");
  72
  73 /*
  74  * Redefine so that we can have same named attributes in the
  75  * sdev/starget/host objects.
  76  */
  77 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)                \
  78 struct device_attribute device_attr_##_prefix##_##_name =       \
  79         __ATTR(_name,_mode,_show,_store)
  80
  81 #define fc_enum_name_search(title, table_type, table)                   \
  82 static const char *get_fc_##title##_name(enum table_type table_key)     \
  83 {                                                                       \
  84         int i;                                                          \
  85         char *name = NULL;                                              \
  86                                                                         \
  87         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
  88                 if (table[i].value == table_key) {                      \
  89                         name = table[i].name;                           \
  90                         break;                                          \
  91                 }                                                       \
  92         }                                                               \
  93         return name;                                                    \
  94 }
  95
  96 #define fc_enum_name_match(title, table_type, table)                    \
  97 static int get_fc_##title##_match(const char *table_key,                \
  98                 enum table_type *value)                                 \
  99 {                                                                       \
 100         int i;                                                          \
 101                                                                         \
 102         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
 103                 if (strncmp(table_key, table[i].name,                   \
 104                                 table[i].matchlen) == 0) {              \
 105                         *value = table[i].value;                        \
 106                         return 0; /* success */                         \
 107                 }                                                       \
 108         }                                                               \
 109         return 1; /* failure */                                         \
 110 }
 111
 112
 113 /* Convert fc_port_type values to ascii string name */
 114 static struct {
 115         enum fc_port_type       value;
 116         char                    *name;
 117 } fc_port_type_names[] = {
 118         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
 119         { FC_PORTTYPE_OTHER,            "Other" },
 120         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
 121         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
 122         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
 123         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
 124         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection)" },
 125         { FC_PORTTYPE_NPIV,             "NPIV VPORT" },
 126 };
 127 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
 128 #define FC_PORTTYPE_MAX_NAMELEN         50
 129
 130 /* Reuse fc_port_type enum function for vport_type */
 131 #define get_fc_vport_type_name get_fc_port_type_name
 132
 133
 134 /* Convert fc_host_event_code values to ascii string name */
 135 static const struct {
 136         enum fc_host_event_code         value;
 137         char                            *name;
 138 } fc_host_event_code_names[] = {
 139         { FCH_EVT_LIP,                  "lip" },
 140         { FCH_EVT_LINKUP,               "link_up" },
 141         { FCH_EVT_LINKDOWN,             "link_down" },
 142         { FCH_EVT_LIPRESET,             "lip_reset" },
 143         { FCH_EVT_RSCN,                 "rscn" },
 144         { FCH_EVT_ADAPTER_CHANGE,       "adapter_chg" },
 145         { FCH_EVT_PORT_UNKNOWN,         "port_unknown" },
 146         { FCH_EVT_PORT_ONLINE,          "port_online" },
 147         { FCH_EVT_PORT_OFFLINE,         "port_offline" },
 148         { FCH_EVT_PORT_FABRIC,          "port_fabric" },
 149         { FCH_EVT_LINK_UNKNOWN,         "link_unknown" },
 150         { FCH_EVT_VENDOR_UNIQUE,        "vendor_unique" },
 151 };
 152 fc_enum_name_search(host_event_code, fc_host_event_code,
 153                 fc_host_event_code_names)
 154 #define FC_HOST_EVENT_CODE_MAX_NAMELEN  30
 155
 156
 157 /* Convert fc_port_state values to ascii string name */
 158 static struct {
 159         enum fc_port_state      value;
 160         char                    *name;
 161 } fc_port_state_names[] = {
 162         { FC_PORTSTATE_UNKNOWN,         "Unknown" },
 163         { FC_PORTSTATE_NOTPRESENT,      "Not Present" },
 164         { FC_PORTSTATE_ONLINE,          "Online" },
 165         { FC_PORTSTATE_OFFLINE,         "Offline" },
 166         { FC_PORTSTATE_BLOCKED,         "Blocked" },
 167         { FC_PORTSTATE_BYPASSED,        "Bypassed" },
 168         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics" },
 169         { FC_PORTSTATE_LINKDOWN,        "Linkdown" },
 170         { FC_PORTSTATE_ERROR,           "Error" },
 171         { FC_PORTSTATE_LOOPBACK,        "Loopback" },
 172         { FC_PORTSTATE_DELETED,         "Deleted" },
 173 };
 174 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
 175 #define FC_PORTSTATE_MAX_NAMELEN        20
 176
 177
 178 /* Convert fc_vport_state values to ascii string name */
 179 static struct {
 180         enum fc_vport_state     value;
 181         char                    *name;
 182 } fc_vport_state_names[] = {
 183         { FC_VPORT_UNKNOWN,             "Unknown" },
 184         { FC_VPORT_ACTIVE,              "Active" },
 185         { FC_VPORT_DISABLED,            "Disabled" },
 186         { FC_VPORT_LINKDOWN,            "Linkdown" },
 187         { FC_VPORT_INITIALIZING,        "Initializing" },
 188         { FC_VPORT_NO_FABRIC_SUPP,      "No Fabric Support" },
 189         { FC_VPORT_NO_FABRIC_RSCS,      "No Fabric Resources" },
 190         { FC_VPORT_FABRIC_LOGOUT,       "Fabric Logout" },
 191         { FC_VPORT_FABRIC_REJ_WWN,      "Fabric Rejected WWN" },
 192         { FC_VPORT_FAILED,              "VPort Failed" },
 193 };
 194 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
 195 #define FC_VPORTSTATE_MAX_NAMELEN       24
 196
 197 /* Reuse fc_vport_state enum function for vport_last_state */
 198 #define get_fc_vport_last_state_name get_fc_vport_state_name
 199
 200
 201 /* Convert fc_tgtid_binding_type values to ascii string name */
 202 static const struct {
 203         enum fc_tgtid_binding_type      value;
 204         char                            *name;
 205         int                             matchlen;
 206 } fc_tgtid_binding_type_names[] = {
 207         { FC_TGTID_BIND_NONE, "none", 4 },
 208         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
 209         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
 210         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
 211 };
 212 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
 213                 fc_tgtid_binding_type_names)
 214 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
 215                 fc_tgtid_binding_type_names)
 216 #define FC_BINDTYPE_MAX_NAMELEN 30
 217
 218
 219 #define fc_bitfield_name_search(title, table)                   \
 220 static ssize_t                                                  \
 221 get_fc_##title##_names(u32 table_key, char *buf)                \
 222 {                                                               \
 223         char *prefix = "";                                      \
 224         ssize_t len = 0;                                        \
 225         int i;                                                  \
 226                                                                 \
 227         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 228                 if (table[i].value & table_key) {               \
 229                         len += sprintf(buf + len, "%s%s",       \
 230                                 prefix, table[i].name);         \
 231                         prefix = ", ";                          \
 232                 }                                               \
 233         }                                                       \
 234         len += sprintf(buf + len, "\n");                        \
 235         return len;                                             \
 236 }
 237
 238
 239 /* Convert FC_COS bit values to ascii string name */
 240 static const struct {
 241         u32                     value;
 242         char                    *name;
 243 } fc_cos_names[] = {
 244         { FC_COS_CLASS1,        "Class 1" },
 245         { FC_COS_CLASS2,        "Class 2" },
 246         { FC_COS_CLASS3,        "Class 3" },
 247         { FC_COS_CLASS4,        "Class 4" },
 248         { FC_COS_CLASS6,        "Class 6" },
 249 };
 250 fc_bitfield_name_search(cos, fc_cos_names)
 251
 252
 253 /* Convert FC_PORTSPEED bit values to ascii string name */
 254 static const struct {
 255         u32                     value;
 256         char                    *name;
 257 } fc_port_speed_names[] = {
 258         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
 259         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
 260         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
 261         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
 262         { FC_PORTSPEED_8GBIT,           "8 Gbit" },
 263         { FC_PORTSPEED_16GBIT,          "16 Gbit" },
 264         { FC_PORTSPEED_32GBIT,          "32 Gbit" },
 265         { FC_PORTSPEED_20GBIT,          "20 Gbit" },
 266         { FC_PORTSPEED_40GBIT,          "40 Gbit" },
 267         { FC_PORTSPEED_50GBIT,          "50 Gbit" },
 268         { FC_PORTSPEED_100GBIT,         "100 Gbit" },
 269         { FC_PORTSPEED_25GBIT,          "25 Gbit" },
 270         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
 271 };
 272 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 273
 274
 275 static int
 276 show_fc_fc4s (char *buf, u8 *fc4_list)
 277 {
 278         int i, len=0;
 279
 280         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 281                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 282         len += sprintf(buf + len, "\n");
 283         return len;
 284 }
 285
 286
 287 /* Convert FC_PORT_ROLE bit values to ascii string name */
 288 static const struct {
 289         u32                     value;
 290         char                    *name;
 291 } fc_port_role_names[] = {
 292         { FC_PORT_ROLE_FCP_TARGET,      "FCP Target" },
 293         { FC_PORT_ROLE_FCP_INITIATOR,   "FCP Initiator" },
 294         { FC_PORT_ROLE_IP_PORT,         "IP Port" },
 295 };
 296 fc_bitfield_name_search(port_roles, fc_port_role_names)
 297
 298 /*
 299  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 300  */
 301 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 302 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 303 #define FC_FPORT_PORTID                 0x00000e
 304 #define FC_FABCTLR_PORTID               0x00000d
 305 #define FC_DIRSRVR_PORTID               0x00000c
 306 #define FC_TIMESRVR_PORTID              0x00000b
 307 #define FC_MGMTSRVR_PORTID              0x00000a
 308
 309
 310 static void fc_timeout_deleted_rport(struct work_struct *work);
 311 static void fc_timeout_fail_rport_io(struct work_struct *work);
 312 static void fc_scsi_scan_rport(struct work_struct *work);
 313
 314 /*
 315  * Attribute counts pre object type...
 316  * Increase these values if you add attributes
 317  */
 318 #define FC_STARGET_NUM_ATTRS    3
 319 #define FC_RPORT_NUM_ATTRS      10
 320 #define FC_VPORT_NUM_ATTRS      9
 321 #define FC_HOST_NUM_ATTRS       29
 322
 323 struct fc_internal {
 324         struct scsi_transport_template t;
 325         struct fc_function_template *f;
 326
 327         /*
 328          * For attributes : each object has :
 329          *   An array of the actual attributes structures
 330          *   An array of null-terminated pointers to the attribute
 331          *     structures - used for mid-layer interaction.
 332          *
 333          * The attribute containers for the starget and host are are
 334          * part of the midlayer. As the remote port is specific to the
 335          * fc transport, we must provide the attribute container.
 336          */
 337         struct device_attribute private_starget_attrs[
 338                                                         FC_STARGET_NUM_ATTRS];
 339         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 340
 341         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 342         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 343
 344         struct transport_container rport_attr_cont;
 345         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 346         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 347
 348         struct transport_container vport_attr_cont;
 349         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
 350         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
 351 };
 352
 353 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 354
 355 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 356                            struct device *cdev)
 357 {
 358         struct scsi_target *starget = to_scsi_target(dev);
 359         struct fc_rport *rport = starget_to_rport(starget);
 360
 361         /*
 362          * if parent is remote port, use values from remote port.
 363          * Otherwise, this host uses the fc_transport, but not the
 364          * remote port interface. As such, initialize to known non-values.
 365          */
 366         if (rport) {
 367                 fc_starget_node_name(starget) = rport->node_name;
 368                 fc_starget_port_name(starget) = rport->port_name;
 369                 fc_starget_port_id(starget) = rport->port_id;
 370         } else {
 371                 fc_starget_node_name(starget) = -1;
 372                 fc_starget_port_name(starget) = -1;
 373                 fc_starget_port_id(starget) = -1;
 374         }
 375
 376         return 0;
 377 }
 378
 379 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 380                                "fc_transport",
 381                                fc_target_setup,
 382                                NULL,
 383                                NULL);
 384
 385 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 386                          struct device *cdev)
 387 {
 388         struct Scsi_Host *shost = dev_to_shost(dev);
 389         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 390
 391         /*
 392          * Set default values easily detected by the midlayer as
 393          * failure cases.  The scsi lldd is responsible for initializing
 394          * all transport attributes to valid values per host.
 395          */
 396         fc_host->node_name = -1;
 397         fc_host->port_name = -1;
 398         fc_host->permanent_port_name = -1;
 399         fc_host->supported_classes = FC_COS_UNSPECIFIED;
 400         memset(fc_host->supported_fc4s, 0,
 401                 sizeof(fc_host->supported_fc4s));
 402         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
 403         fc_host->maxframe_size = -1;
 404         fc_host->max_npiv_vports = 0;
 405         memset(fc_host->serial_number, 0,
 406                 sizeof(fc_host->serial_number));
 407         memset(fc_host->manufacturer, 0,
 408                 sizeof(fc_host->manufacturer));
 409         memset(fc_host->model, 0,
 410                 sizeof(fc_host->model));
 411         memset(fc_host->model_description, 0,
 412                 sizeof(fc_host->model_description));
 413         memset(fc_host->hardware_version, 0,
 414                 sizeof(fc_host->hardware_version));
 415         memset(fc_host->driver_version, 0,
 416                 sizeof(fc_host->driver_version));
 417         memset(fc_host->firmware_version, 0,
 418                 sizeof(fc_host->firmware_version));
 419         memset(fc_host->optionrom_version, 0,
 420                 sizeof(fc_host->optionrom_version));
 421
 422         fc_host->port_id = -1;
 423         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
 424         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
 425         memset(fc_host->active_fc4s, 0,
 426                 sizeof(fc_host->active_fc4s));
 427         fc_host->speed = FC_PORTSPEED_UNKNOWN;
 428         fc_host->fabric_name = -1;
 429         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
 430         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
 431
 432         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
 433
 434         INIT_LIST_HEAD(&fc_host->rports);
 435         INIT_LIST_HEAD(&fc_host->rport_bindings);
 436         INIT_LIST_HEAD(&fc_host->vports);
 437         fc_host->next_rport_number = 0;
 438         fc_host->next_target_id = 0;
 439         fc_host->next_vport_number = 0;
 440         fc_host->npiv_vports_inuse = 0;
 441
 442         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
 443                  "fc_wq_%d", shost->host_no);
 444         fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
 445         if (!fc_host->work_q)
 446                 return -ENOMEM;
 447
 448         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
 449         snprintf(fc_host->devloss_work_q_name,
 450                  sizeof(fc_host->devloss_work_q_name),
 451                  "fc_dl_%d", shost->host_no);
 452         fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
 453                                         fc_host->devloss_work_q_name);
 454         if (!fc_host->devloss_work_q) {
 455                 destroy_workqueue(fc_host->work_q);
 456                 fc_host->work_q = NULL;
 457                 return -ENOMEM;
 458         }
 459
 460         fc_bsg_hostadd(shost, fc_host);
 461         /* ignore any bsg add error - we just can't do sgio */
 462
 463         return 0;
 464 }
 465
 466 static int fc_host_remove(struct transport_container *tc, struct device *dev,
 467                          struct device *cdev)
 468 {
 469         struct Scsi_Host *shost = dev_to_shost(dev);
 470         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 471
 472         fc_bsg_remove(fc_host->rqst_q);
 473         return 0;
 474 }
 475
 476 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 477                                "fc_host",
 478                                fc_host_setup,
 479                                fc_host_remove,
 480                                NULL);
 481
 482 /*
 483  * Setup and Remove actions for remote ports are handled
 484  * in the service functions below.
 485  */
 486 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 487                                "fc_remote_ports",
 488                                NULL,
 489                                NULL,
 490                                NULL);
 491
 492 /*
 493  * Setup and Remove actions for virtual ports are handled
 494  * in the service functions below.
 495  */
 496 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
 497                                "fc_vports",
 498                                NULL,
 499                                NULL,
 500                                NULL);
 501
 502 /*
 503  * Netlink Infrastructure
 504  */
 505
 506 static atomic_t fc_event_seq;
 507
 508 /**
 509  * fc_get_event_number - Obtain the next sequential FC event number
 510  *
 511  * Notes:
 512  *   We could have inlined this, but it would have required fc_event_seq to
 513  *   be exposed. For now, live with the subroutine call.
 514  *   Atomic used to avoid lock/unlock...
 515  */
 516 u32
 517 fc_get_event_number(void)
 518 {
 519         return atomic_add_return(1, &fc_event_seq);
 520 }
 521 EXPORT_SYMBOL(fc_get_event_number);
 522
 523
 524 /**
 525  * fc_host_post_event - called to post an even on an fc_host.
 526  * @shost:              host the event occurred on
 527  * @event_number:       fc event number obtained from get_fc_event_number()
 528  * @event_code:         fc_host event being posted
 529  * @event_data:         32bits of data for the event being posted
 530  *
 531  * Notes:
 532  *      This routine assumes no locks are held on entry.
 533  */
 534 void
 535 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 536                 enum fc_host_event_code event_code, u32 event_data)
 537 {
 538         struct sk_buff *skb;
 539         struct nlmsghdr *nlh;
 540         struct fc_nl_event *event;
 541         const char *name;
 542         u32 len;
 543         int err;
 544
 545         if (!scsi_nl_sock) {
 546                 err = -ENOENT;
 547                 goto send_fail;
 548         }
 549
 550         len = FC_NL_MSGALIGN(sizeof(*event));
 551
 552         skb = nlmsg_new(len, GFP_KERNEL);
 553         if (!skb) {
 554                 err = -ENOBUFS;
 555                 goto send_fail;
 556         }
 557
 558         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 559         if (!nlh) {
 560                 err = -ENOBUFS;
 561                 goto send_fail_skb;
 562         }
 563         event = nlmsg_data(nlh);
 564
 565         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 566                                 FC_NL_ASYNC_EVENT, len);
 567         event->seconds = get_seconds();
 568         event->vendor_id = 0;
 569         event->host_no = shost->host_no;
 570         event->event_datalen = sizeof(u32);     /* bytes */
 571         event->event_num = event_number;
 572         event->event_code = event_code;
 573         event->event_data = event_data;
 574
 575         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 576                         GFP_KERNEL);
 577         return;
 578
 579 send_fail_skb:
 580         kfree_skb(skb);
 581 send_fail:
 582         name = get_fc_host_event_code_name(event_code);
 583         printk(KERN_WARNING
 584                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
 585                 __func__, shost->host_no,
 586                 (name) ? name : "<unknown>", event_data, err);
 587         return;
 588 }
 589 EXPORT_SYMBOL(fc_host_post_event);
 590
 591
 592 /**
 593  * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
 594  * @shost:              host the event occurred on
 595  * @event_number:       fc event number obtained from get_fc_event_number()
 596  * @data_len:           amount, in bytes, of vendor unique data
 597  * @data_buf:           pointer to vendor unique data
 598  * @vendor_id:          Vendor id
 599  *
 600  * Notes:
 601  *      This routine assumes no locks are held on entry.
 602  */
 603 void
 604 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 605                 u32 data_len, char * data_buf, u64 vendor_id)
 606 {
 607         struct sk_buff *skb;
 608         struct nlmsghdr *nlh;
 609         struct fc_nl_event *event;
 610         u32 len;
 611         int err;
 612
 613         if (!scsi_nl_sock) {
 614                 err = -ENOENT;
 615                 goto send_vendor_fail;
 616         }
 617
 618         len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
 619
 620         skb = nlmsg_new(len, GFP_KERNEL);
 621         if (!skb) {
 622                 err = -ENOBUFS;
 623                 goto send_vendor_fail;
 624         }
 625
 626         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 627         if (!nlh) {
 628                 err = -ENOBUFS;
 629                 goto send_vendor_fail_skb;
 630         }
 631         event = nlmsg_data(nlh);
 632
 633         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 634                                 FC_NL_ASYNC_EVENT, len);
 635         event->seconds = get_seconds();
 636         event->vendor_id = vendor_id;
 637         event->host_no = shost->host_no;
 638         event->event_datalen = data_len;        /* bytes */
 639         event->event_num = event_number;
 640         event->event_code = FCH_EVT_VENDOR_UNIQUE;
 641         memcpy(&event->event_data, data_buf, data_len);
 642
 643         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 644                         GFP_KERNEL);
 645         return;
 646
 647 send_vendor_fail_skb:
 648         kfree_skb(skb);
 649 send_vendor_fail:
 650         printk(KERN_WARNING
 651                 "%s: Dropped Event : host %d vendor_unique - err %d\n",
 652                 __func__, shost->host_no, err);
 653         return;
 654 }
 655 EXPORT_SYMBOL(fc_host_post_vendor_event);
 656
 657
 658
 659 static __init int fc_transport_init(void)
 660 {
 661         int error;
 662
 663         atomic_set(&fc_event_seq, 0);
 664
 665         error = transport_class_register(&fc_host_class);
 666         if (error)
 667                 return error;
 668         error = transport_class_register(&fc_vport_class);
 669         if (error)
 670                 goto unreg_host_class;
 671         error = transport_class_register(&fc_rport_class);
 672         if (error)
 673                 goto unreg_vport_class;
 674         error = transport_class_register(&fc_transport_class);
 675         if (error)
 676                 goto unreg_rport_class;
 677         return 0;
 678
 679 unreg_rport_class:
 680         transport_class_unregister(&fc_rport_class);
 681 unreg_vport_class:
 682         transport_class_unregister(&fc_vport_class);
 683 unreg_host_class:
 684         transport_class_unregister(&fc_host_class);
 685         return error;
 686 }
 687
 688 static void __exit fc_transport_exit(void)
 689 {
 690         transport_class_unregister(&fc_transport_class);
 691         transport_class_unregister(&fc_rport_class);
 692         transport_class_unregister(&fc_host_class);
 693         transport_class_unregister(&fc_vport_class);
 694 }
 695
 696 /*
 697  * FC Remote Port Attribute Management
 698  */
 699
 700 #define fc_rport_show_function(field, format_string, sz, cast)          \
 701 static ssize_t                                                          \
 702 show_fc_rport_##field (struct device *dev,                              \
 703                        struct device_attribute *attr, char *buf)        \
 704 {                                                                       \
 705         struct fc_rport *rport = transport_class_to_rport(dev);         \
 706         struct Scsi_Host *shost = rport_to_shost(rport);                \
 707         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 708         if ((i->f->get_rport_##field) &&                                \
 709             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 710               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 711               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 712                 i->f->get_rport_##field(rport);                         \
 713         return snprintf(buf, sz, format_string, cast rport->field);     \
 714 }
 715
 716 #define fc_rport_store_function(field)                                  \
 717 static ssize_t                                                          \
 718 store_fc_rport_##field(struct device *dev,                              \
 719                        struct device_attribute *attr,                   \
 720                        const char *buf, size_t count)                   \
 721 {                                                                       \
 722         int val;                                                        \
 723         struct fc_rport *rport = transport_class_to_rport(dev);         \
 724         struct Scsi_Host *shost = rport_to_shost(rport);                \
 725         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 726         char *cp;                                                       \
 727         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
 728             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
 729             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
 730                 return -EBUSY;                                          \
 731         val = simple_strtoul(buf, &cp, 0);                              \
 732         if (*cp && (*cp != '\n'))                                       \
 733                 return -EINVAL;                                         \
 734         i->f->set_rport_##field(rport, val);                            \
 735         return count;                                                   \
 736 }
 737
 738 #define fc_rport_rd_attr(field, format_string, sz)                      \
 739         fc_rport_show_function(field, format_string, sz, )              \
 740 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 741                          show_fc_rport_##field, NULL)
 742
 743 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
 744         fc_rport_show_function(field, format_string, sz, (cast))        \
 745 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 746                           show_fc_rport_##field, NULL)
 747
 748 #define fc_rport_rw_attr(field, format_string, sz)                      \
 749         fc_rport_show_function(field, format_string, sz, )              \
 750         fc_rport_store_function(field)                                  \
 751 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
 752                         show_fc_rport_##field,                          \
 753                         store_fc_rport_##field)
 754
 755
 756 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
 757 static ssize_t                                                          \
 758 show_fc_rport_##field (struct device *dev,                              \
 759                        struct device_attribute *attr, char *buf)        \
 760 {                                                                       \
 761         struct fc_rport *rport = transport_class_to_rport(dev);         \
 762         return snprintf(buf, sz, format_string, cast rport->field);     \
 763 }
 764
 765 #define fc_private_rport_rd_attr(field, format_string, sz)              \
 766         fc_private_rport_show_function(field, format_string, sz, )      \
 767 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 768                          show_fc_rport_##field, NULL)
 769
 770 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
 771         fc_private_rport_show_function(field, format_string, sz, (cast)) \
 772 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 773                           show_fc_rport_##field, NULL)
 774
 775
 776 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
 777 static ssize_t                                                          \
 778 show_fc_rport_##title (struct device *dev,                              \
 779                        struct device_attribute *attr, char *buf)        \
 780 {                                                                       \
 781         struct fc_rport *rport = transport_class_to_rport(dev);         \
 782         const char *name;                                               \
 783         name = get_fc_##title##_name(rport->title);                     \
 784         if (!name)                                                      \
 785                 return -EINVAL;                                         \
 786         return snprintf(buf, maxlen, "%s\n", name);                     \
 787 }                                                                       \
 788 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
 789                         show_fc_rport_##title, NULL)
 790
 791
 792 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
 793         i->private_rport_attrs[count] = device_attr_rport_##field; \
 794         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 795         i->private_rport_attrs[count].store = NULL;                     \
 796         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 797         if (i->f->show_rport_##field)                                   \
 798                 count++
 799
 800 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
 801         i->private_rport_attrs[count] = device_attr_rport_##field; \
 802         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 803         i->private_rport_attrs[count].store = NULL;                     \
 804         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 805         count++
 806
 807 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
 808         i->private_rport_attrs[count] = device_attr_rport_##field; \
 809         if (!i->f->set_rport_##field) {                                 \
 810                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
 811                 i->private_rport_attrs[count].store = NULL;             \
 812         }                                                               \
 813         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 814         if (i->f->show_rport_##field)                                   \
 815                 count++
 816
 817 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
 818 {                                                                       \
 819         i->private_rport_attrs[count] = device_attr_rport_##field; \
 820         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 821         count++;                                                        \
 822 }
 823
 824
 825 /* The FC Transport Remote Port Attributes: */
 826
 827 /* Fixed Remote Port Attributes */
 828
 829 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
 830
 831 static ssize_t
 832 show_fc_rport_supported_classes (struct device *dev,
 833                                  struct device_attribute *attr, char *buf)
 834 {
 835         struct fc_rport *rport = transport_class_to_rport(dev);
 836         if (rport->supported_classes == FC_COS_UNSPECIFIED)
 837                 return snprintf(buf, 20, "unspecified\n");
 838         return get_fc_cos_names(rport->supported_classes, buf);
 839 }
 840 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
 841                 show_fc_rport_supported_classes, NULL);
 842
 843 /* Dynamic Remote Port Attributes */
 844
 845 /*
 846  * dev_loss_tmo attribute
 847  */
 848 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
 849 {
 850         char *cp;
 851
 852         *val = simple_strtoul(buf, &cp, 0);
 853         if ((*cp && (*cp != '\n')) || (*val < 0))
 854                 return -EINVAL;
 855         /*
 856          * Check for overflow; dev_loss_tmo is u32
 857          */
 858         if (*val > UINT_MAX)
 859                 return -EINVAL;
 860
 861         return 0;
 862 }
 863
 864 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
 865                                      unsigned long val)
 866 {
 867         struct Scsi_Host *shost = rport_to_shost(rport);
 868         struct fc_internal *i = to_fc_internal(shost->transportt);
 869
 870         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 871             (rport->port_state == FC_PORTSTATE_DELETED) ||
 872             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 873                 return -EBUSY;
 874         /*
 875          * Check for overflow; dev_loss_tmo is u32
 876          */
 877         if (val > UINT_MAX)
 878                 return -EINVAL;
 879
 880         /*
 881          * If fast_io_fail is off we have to cap
 882          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
 883          */
 884         if (rport->fast_io_fail_tmo == -1 &&
 885             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
 886                 return -EINVAL;
 887
 888         i->f->set_rport_dev_loss_tmo(rport, val);
 889         return 0;
 890 }
 891
 892 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
 893 static ssize_t
 894 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 895                             const char *buf, size_t count)
 896 {
 897         struct fc_rport *rport = transport_class_to_rport(dev);
 898         unsigned long val;
 899         int rc;
 900
 901         rc = fc_str_to_dev_loss(buf, &val);
 902         if (rc)
 903                 return rc;
 904
 905         rc = fc_rport_set_dev_loss_tmo(rport, val);
 906         if (rc)
 907                 return rc;
 908         return count;
 909 }
 910 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
 911                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
 912
 913
 914 /* Private Remote Port Attributes */
 915
 916 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 917 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 918 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
 919
 920 static ssize_t
 921 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
 922                      char *buf)
 923 {
 924         struct fc_rport *rport = transport_class_to_rport(dev);
 925
 926         /* identify any roles that are port_id specific */
 927         if ((rport->port_id != -1) &&
 928             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
 929                                         FC_WELLKNOWN_PORTID_MASK) {
 930                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
 931                 case FC_FPORT_PORTID:
 932                         return snprintf(buf, 30, "Fabric Port\n");
 933                 case FC_FABCTLR_PORTID:
 934                         return snprintf(buf, 30, "Fabric Controller\n");
 935                 case FC_DIRSRVR_PORTID:
 936                         return snprintf(buf, 30, "Directory Server\n");
 937                 case FC_TIMESRVR_PORTID:
 938                         return snprintf(buf, 30, "Time Server\n");
 939                 case FC_MGMTSRVR_PORTID:
 940                         return snprintf(buf, 30, "Management Server\n");
 941                 default:
 942                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
 943                 }
 944         } else {
 945                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
 946                         return snprintf(buf, 20, "unknown\n");
 947                 return get_fc_port_roles_names(rport->roles, buf);
 948         }
 949 }
 950 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
 951                 show_fc_rport_roles, NULL);
 952
 953 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 954 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
 955
 956 /*
 957  * fast_io_fail_tmo attribute
 958  */
 959 static ssize_t
 960 show_fc_rport_fast_io_fail_tmo (struct device *dev,
 961                                 struct device_attribute *attr, char *buf)
 962 {
 963         struct fc_rport *rport = transport_class_to_rport(dev);
 964
 965         if (rport->fast_io_fail_tmo == -1)
 966                 return snprintf(buf, 5, "off\n");
 967         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
 968 }
 969
 970 static ssize_t
 971 store_fc_rport_fast_io_fail_tmo(struct device *dev,
 972                                 struct device_attribute *attr, const char *buf,
 973                                 size_t count)
 974 {
 975         int val;
 976         char *cp;
 977         struct fc_rport *rport = transport_class_to_rport(dev);
 978
 979         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 980             (rport->port_state == FC_PORTSTATE_DELETED) ||
 981             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 982                 return -EBUSY;
 983         if (strncmp(buf, "off", 3) == 0)
 984                 rport->fast_io_fail_tmo = -1;
 985         else {
 986                 val = simple_strtoul(buf, &cp, 0);
 987                 if ((*cp && (*cp != '\n')) || (val < 0))
 988                         return -EINVAL;
 989                 /*
 990                  * Cap fast_io_fail by dev_loss_tmo or
 991                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 992                  */
 993                 if ((val >= rport->dev_loss_tmo) ||
 994                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
 995                         return -EINVAL;
 996
 997                 rport->fast_io_fail_tmo = val;
 998         }
 999         return count;
1000 }
1001 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1002         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1003
1004
1005 /*
1006  * FC SCSI Target Attribute Management
1007  */
1008
1009 /*
1010  * Note: in the target show function we recognize when the remote
1011  *  port is in the hierarchy and do not allow the driver to get
1012  *  involved in sysfs functions. The driver only gets involved if
1013  *  it's the "old" style that doesn't use rports.
1014  */
1015 #define fc_starget_show_function(field, format_string, sz, cast)        \
1016 static ssize_t                                                          \
1017 show_fc_starget_##field (struct device *dev,                            \
1018                          struct device_attribute *attr, char *buf)      \
1019 {                                                                       \
1020         struct scsi_target *starget = transport_class_to_starget(dev);  \
1021         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1022         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1023         struct fc_rport *rport = starget_to_rport(starget);             \
1024         if (rport)                                                      \
1025                 fc_starget_##field(starget) = rport->field;             \
1026         else if (i->f->get_starget_##field)                             \
1027                 i->f->get_starget_##field(starget);                     \
1028         return snprintf(buf, sz, format_string,                         \
1029                 cast fc_starget_##field(starget));                      \
1030 }
1031
1032 #define fc_starget_rd_attr(field, format_string, sz)                    \
1033         fc_starget_show_function(field, format_string, sz, )            \
1034 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1035                          show_fc_starget_##field, NULL)
1036
1037 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1038         fc_starget_show_function(field, format_string, sz, (cast))      \
1039 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1040                           show_fc_starget_##field, NULL)
1041
1042 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1043         i->private_starget_attrs[count] = device_attr_starget_##field; \
1044         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1045         i->private_starget_attrs[count].store = NULL;                   \
1046         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1047         if (i->f->show_starget_##field)                                 \
1048                 count++
1049
1050 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1051         i->private_starget_attrs[count] = device_attr_starget_##field; \
1052         if (!i->f->set_starget_##field) {                               \
1053                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1054                 i->private_starget_attrs[count].store = NULL;           \
1055         }                                                               \
1056         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1057         if (i->f->show_starget_##field)                                 \
1058                 count++
1059
1060 /* The FC Transport SCSI Target Attributes: */
1061 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1062 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1063 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1064
1065
1066 /*
1067  * FC Virtual Port Attribute Management
1068  */
1069
1070 #define fc_vport_show_function(field, format_string, sz, cast)          \
1071 static ssize_t                                                          \
1072 show_fc_vport_##field (struct device *dev,                              \
1073                        struct device_attribute *attr, char *buf)        \
1074 {                                                                       \
1075         struct fc_vport *vport = transport_class_to_vport(dev);         \
1076         struct Scsi_Host *shost = vport_to_shost(vport);                \
1077         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1078         if ((i->f->get_vport_##field) &&                                \
1079             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1080                 i->f->get_vport_##field(vport);                         \
1081         return snprintf(buf, sz, format_string, cast vport->field);     \
1082 }
1083
1084 #define fc_vport_store_function(field)                                  \
1085 static ssize_t                                                          \
1086 store_fc_vport_##field(struct device *dev,                              \
1087                        struct device_attribute *attr,                   \
1088                        const char *buf, size_t count)                   \
1089 {                                                                       \
1090         int val;                                                        \
1091         struct fc_vport *vport = transport_class_to_vport(dev);         \
1092         struct Scsi_Host *shost = vport_to_shost(vport);                \
1093         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1094         char *cp;                                                       \
1095         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1096                 return -EBUSY;                                          \
1097         val = simple_strtoul(buf, &cp, 0);                              \
1098         if (*cp && (*cp != '\n'))                                       \
1099                 return -EINVAL;                                         \
1100         i->f->set_vport_##field(vport, val);                            \
1101         return count;                                                   \
1102 }
1103
1104 #define fc_vport_store_str_function(field, slen)                        \
1105 static ssize_t                                                          \
1106 store_fc_vport_##field(struct device *dev,                              \
1107                        struct device_attribute *attr,                   \
1108                        const char *buf, size_t count)                   \
1109 {                                                                       \
1110         struct fc_vport *vport = transport_class_to_vport(dev);         \
1111         struct Scsi_Host *shost = vport_to_shost(vport);                \
1112         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1113         unsigned int cnt=count;                                         \
1114                                                                         \
1115         /* count may include a LF at end of string */                   \
1116         if (buf[cnt-1] == '\n')                                         \
1117                 cnt--;                                                  \
1118         if (cnt > ((slen) - 1))                                         \
1119                 return -EINVAL;                                         \
1120         memcpy(vport->field, buf, cnt);                                 \
1121         i->f->set_vport_##field(vport);                                 \
1122         return count;                                                   \
1123 }
1124
1125 #define fc_vport_rd_attr(field, format_string, sz)                      \
1126         fc_vport_show_function(field, format_string, sz, )              \
1127 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1128                          show_fc_vport_##field, NULL)
1129
1130 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1131         fc_vport_show_function(field, format_string, sz, (cast))        \
1132 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1133                           show_fc_vport_##field, NULL)
1134
1135 #define fc_vport_rw_attr(field, format_string, sz)                      \
1136         fc_vport_show_function(field, format_string, sz, )              \
1137         fc_vport_store_function(field)                                  \
1138 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1139                         show_fc_vport_##field,                          \
1140                         store_fc_vport_##field)
1141
1142 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1143 static ssize_t                                                          \
1144 show_fc_vport_##field (struct device *dev,                              \
1145                        struct device_attribute *attr, char *buf)        \
1146 {                                                                       \
1147         struct fc_vport *vport = transport_class_to_vport(dev);         \
1148         return snprintf(buf, sz, format_string, cast vport->field);     \
1149 }
1150
1151 #define fc_private_vport_store_u32_function(field)                      \
1152 static ssize_t                                                          \
1153 store_fc_vport_##field(struct device *dev,                              \
1154                        struct device_attribute *attr,                   \
1155                        const char *buf, size_t count)                   \
1156 {                                                                       \
1157         u32 val;                                                        \
1158         struct fc_vport *vport = transport_class_to_vport(dev);         \
1159         char *cp;                                                       \
1160         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1161                 return -EBUSY;                                          \
1162         val = simple_strtoul(buf, &cp, 0);                              \
1163         if (*cp && (*cp != '\n'))                                       \
1164                 return -EINVAL;                                         \
1165         vport->field = val;                                             \
1166         return count;                                                   \
1167 }
1168
1169
1170 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1171         fc_private_vport_show_function(field, format_string, sz, )      \
1172 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1173                          show_fc_vport_##field, NULL)
1174
1175 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1176         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1177 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1178                           show_fc_vport_##field, NULL)
1179
1180 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1181         fc_private_vport_show_function(field, format_string, sz, )      \
1182         fc_private_vport_store_u32_function(field)                      \
1183 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1184                         show_fc_vport_##field,                          \
1185                         store_fc_vport_##field)
1186
1187
1188 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1189 static ssize_t                                                          \
1190 show_fc_vport_##title (struct device *dev,                              \
1191                        struct device_attribute *attr,                   \
1192                        char *buf)                                       \
1193 {                                                                       \
1194         struct fc_vport *vport = transport_class_to_vport(dev);         \
1195         const char *name;                                               \
1196         name = get_fc_##title##_name(vport->title);                     \
1197         if (!name)                                                      \
1198                 return -EINVAL;                                         \
1199         return snprintf(buf, maxlen, "%s\n", name);                     \
1200 }                                                                       \
1201 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1202                         show_fc_vport_##title, NULL)
1203
1204
1205 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1206         i->private_vport_attrs[count] = device_attr_vport_##field; \
1207         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1208         i->private_vport_attrs[count].store = NULL;                     \
1209         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1210         if (i->f->get_##field)                                          \
1211                 count++
1212         /* NOTE: Above MACRO differs: checks function not show bit */
1213
1214 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1215         i->private_vport_attrs[count] = device_attr_vport_##field; \
1216         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1217         i->private_vport_attrs[count].store = NULL;                     \
1218         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1219         count++
1220
1221 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1222         i->private_vport_attrs[count] = device_attr_vport_##field; \
1223         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1224         if (i->f->field)                                                \
1225                 count++
1226         /* NOTE: Above MACRO differs: checks function */
1227
1228 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1229         i->private_vport_attrs[count] = device_attr_vport_##field; \
1230         if (!i->f->set_vport_##field) {                                 \
1231                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1232                 i->private_vport_attrs[count].store = NULL;             \
1233         }                                                               \
1234         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1235         count++
1236         /* NOTE: Above MACRO differs: does not check show bit */
1237
1238 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1239 {                                                                       \
1240         i->private_vport_attrs[count] = device_attr_vport_##field; \
1241         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1242         count++;                                                        \
1243 }
1244
1245
1246 /* The FC Transport Virtual Port Attributes: */
1247
1248 /* Fixed Virtual Port Attributes */
1249
1250 /* Dynamic Virtual Port Attributes */
1251
1252 /* Private Virtual Port Attributes */
1253
1254 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1255 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1256 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1257 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1258
1259 static ssize_t
1260 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1261                      char *buf)
1262 {
1263         struct fc_vport *vport = transport_class_to_vport(dev);
1264
1265         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1266                 return snprintf(buf, 20, "unknown\n");
1267         return get_fc_port_roles_names(vport->roles, buf);
1268 }
1269 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1270
1271 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1272
1273 fc_private_vport_show_function(symbolic_name, "%s\n",
1274                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1275 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1276 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1277                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1278
1279 static ssize_t
1280 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1281                       const char *buf, size_t count)
1282 {
1283         struct fc_vport *vport = transport_class_to_vport(dev);
1284         struct Scsi_Host *shost = vport_to_shost(vport);
1285         unsigned long flags;
1286
1287         spin_lock_irqsave(shost->host_lock, flags);
1288         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1289                 spin_unlock_irqrestore(shost->host_lock, flags);
1290                 return -EBUSY;
1291         }
1292         vport->flags |= FC_VPORT_DELETING;
1293         spin_unlock_irqrestore(shost->host_lock, flags);
1294
1295         fc_queue_work(shost, &vport->vport_delete_work);
1296         return count;
1297 }
1298 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1299                         NULL, store_fc_vport_delete);
1300
1301
1302 /*
1303  * Enable/Disable vport
1304  *  Write "1" to disable, write "0" to enable
1305  */
1306 static ssize_t
1307 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1308                        const char *buf,
1309                            size_t count)
1310 {
1311         struct fc_vport *vport = transport_class_to_vport(dev);
1312         struct Scsi_Host *shost = vport_to_shost(vport);
1313         struct fc_internal *i = to_fc_internal(shost->transportt);
1314         int stat;
1315
1316         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1317                 return -EBUSY;
1318
1319         if (*buf == '0') {
1320                 if (vport->vport_state != FC_VPORT_DISABLED)
1321                         return -EALREADY;
1322         } else if (*buf == '1') {
1323                 if (vport->vport_state == FC_VPORT_DISABLED)
1324                         return -EALREADY;
1325         } else
1326                 return -EINVAL;
1327
1328         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1329         return stat ? stat : count;
1330 }
1331 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1332                         NULL, store_fc_vport_disable);
1333
1334
1335 /*
1336  * Host Attribute Management
1337  */
1338
1339 #define fc_host_show_function(field, format_string, sz, cast)           \
1340 static ssize_t                                                          \
1341 show_fc_host_##field (struct device *dev,                               \
1342                       struct device_attribute *attr, char *buf)         \
1343 {                                                                       \
1344         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1345         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1346         if (i->f->get_host_##field)                                     \
1347                 i->f->get_host_##field(shost);                          \
1348         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1349 }
1350
1351 #define fc_host_store_function(field)                                   \
1352 static ssize_t                                                          \
1353 store_fc_host_##field(struct device *dev,                               \
1354                       struct device_attribute *attr,                    \
1355                       const char *buf,  size_t count)                   \
1356 {                                                                       \
1357         int val;                                                        \
1358         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1359         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1360         char *cp;                                                       \
1361                                                                         \
1362         val = simple_strtoul(buf, &cp, 0);                              \
1363         if (*cp && (*cp != '\n'))                                       \
1364                 return -EINVAL;                                         \
1365         i->f->set_host_##field(shost, val);                             \
1366         return count;                                                   \
1367 }
1368
1369 #define fc_host_store_str_function(field, slen)                         \
1370 static ssize_t                                                          \
1371 store_fc_host_##field(struct device *dev,                               \
1372                       struct device_attribute *attr,                    \
1373                       const char *buf, size_t count)                    \
1374 {                                                                       \
1375         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1376         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1377         unsigned int cnt=count;                                         \
1378                                                                         \
1379         /* count may include a LF at end of string */                   \
1380         if (buf[cnt-1] == '\n')                                         \
1381                 cnt--;                                                  \
1382         if (cnt > ((slen) - 1))                                         \
1383                 return -EINVAL;                                         \
1384         memcpy(fc_host_##field(shost), buf, cnt);                       \
1385         i->f->set_host_##field(shost);                                  \
1386         return count;                                                   \
1387 }
1388
1389 #define fc_host_rd_attr(field, format_string, sz)                       \
1390         fc_host_show_function(field, format_string, sz, )               \
1391 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1392                          show_fc_host_##field, NULL)
1393
1394 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1395         fc_host_show_function(field, format_string, sz, (cast))         \
1396 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1397                           show_fc_host_##field, NULL)
1398
1399 #define fc_host_rw_attr(field, format_string, sz)                       \
1400         fc_host_show_function(field, format_string, sz, )               \
1401         fc_host_store_function(field)                                   \
1402 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1403                         show_fc_host_##field,                           \
1404                         store_fc_host_##field)
1405
1406 #define fc_host_rd_enum_attr(title, maxlen)                             \
1407 static ssize_t                                                          \
1408 show_fc_host_##title (struct device *dev,                               \
1409                       struct device_attribute *attr, char *buf)         \
1410 {                                                                       \
1411         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1412         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1413         const char *name;                                               \
1414         if (i->f->get_host_##title)                                     \
1415                 i->f->get_host_##title(shost);                          \
1416         name = get_fc_##title##_name(fc_host_##title(shost));           \
1417         if (!name)                                                      \
1418                 return -EINVAL;                                         \
1419         return snprintf(buf, maxlen, "%s\n", name);                     \
1420 }                                                                       \
1421 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1422
1423 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1424         i->private_host_attrs[count] = device_attr_host_##field;        \
1425         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1426         i->private_host_attrs[count].store = NULL;                      \
1427         i->host_attrs[count] = &i->private_host_attrs[count];           \
1428         if (i->f->show_host_##field)                                    \
1429                 count++
1430
1431 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1432         i->private_host_attrs[count] = device_attr_host_##field;        \
1433         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1434         i->private_host_attrs[count].store = NULL;                      \
1435         i->host_attrs[count] = &i->private_host_attrs[count];           \
1436         count++
1437
1438 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1439         i->private_host_attrs[count] = device_attr_host_##field;        \
1440         if (!i->f->set_host_##field) {                                  \
1441                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1442                 i->private_host_attrs[count].store = NULL;              \
1443         }                                                               \
1444         i->host_attrs[count] = &i->private_host_attrs[count];           \
1445         if (i->f->show_host_##field)                                    \
1446                 count++
1447
1448
1449 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1450 static ssize_t                                                          \
1451 show_fc_host_##field (struct device *dev,                               \
1452                       struct device_attribute *attr, char *buf)         \
1453 {                                                                       \
1454         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1455         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1456 }
1457
1458 #define fc_private_host_rd_attr(field, format_string, sz)               \
1459         fc_private_host_show_function(field, format_string, sz, )       \
1460 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1461                          show_fc_host_##field, NULL)
1462
1463 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1464         fc_private_host_show_function(field, format_string, sz, (cast)) \
1465 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1466                           show_fc_host_##field, NULL)
1467
1468 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1469         i->private_host_attrs[count] = device_attr_host_##field;        \
1470         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1471         i->private_host_attrs[count].store = NULL;                      \
1472         i->host_attrs[count] = &i->private_host_attrs[count];           \
1473         count++
1474
1475 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1476 {                                                                       \
1477         i->private_host_attrs[count] = device_attr_host_##field;        \
1478         i->host_attrs[count] = &i->private_host_attrs[count];           \
1479         count++;                                                        \
1480 }
1481
1482
1483 /* Fixed Host Attributes */
1484
1485 static ssize_t
1486 show_fc_host_supported_classes (struct device *dev,
1487                                 struct device_attribute *attr, char *buf)
1488 {
1489         struct Scsi_Host *shost = transport_class_to_shost(dev);
1490
1491         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1492                 return snprintf(buf, 20, "unspecified\n");
1493
1494         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1495 }
1496 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1497                 show_fc_host_supported_classes, NULL);
1498
1499 static ssize_t
1500 show_fc_host_supported_fc4s (struct device *dev,
1501                              struct device_attribute *attr, char *buf)
1502 {
1503         struct Scsi_Host *shost = transport_class_to_shost(dev);
1504         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1505 }
1506 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1507                 show_fc_host_supported_fc4s, NULL);
1508
1509 static ssize_t
1510 show_fc_host_supported_speeds (struct device *dev,
1511                                struct device_attribute *attr, char *buf)
1512 {
1513         struct Scsi_Host *shost = transport_class_to_shost(dev);
1514
1515         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1516                 return snprintf(buf, 20, "unknown\n");
1517
1518         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1519 }
1520 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1521                 show_fc_host_supported_speeds, NULL);
1522
1523
1524 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1525 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1526 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1527                              unsigned long long);
1528 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1529 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1530 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1531 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1532 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1533 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1534 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1535 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1537 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1538
1539
1540 /* Dynamic Host Attributes */
1541
1542 static ssize_t
1543 show_fc_host_active_fc4s (struct device *dev,
1544                           struct device_attribute *attr, char *buf)
1545 {
1546         struct Scsi_Host *shost = transport_class_to_shost(dev);
1547         struct fc_internal *i = to_fc_internal(shost->transportt);
1548
1549         if (i->f->get_host_active_fc4s)
1550                 i->f->get_host_active_fc4s(shost);
1551
1552         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1553 }
1554 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1555                 show_fc_host_active_fc4s, NULL);
1556
1557 static ssize_t
1558 show_fc_host_speed (struct device *dev,
1559                     struct device_attribute *attr, char *buf)
1560 {
1561         struct Scsi_Host *shost = transport_class_to_shost(dev);
1562         struct fc_internal *i = to_fc_internal(shost->transportt);
1563
1564         if (i->f->get_host_speed)
1565                 i->f->get_host_speed(shost);
1566
1567         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1568                 return snprintf(buf, 20, "unknown\n");
1569
1570         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1571 }
1572 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1573                 show_fc_host_speed, NULL);
1574
1575
1576 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1577 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1578 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1579 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1580 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1581
1582 fc_private_host_show_function(system_hostname, "%s\n",
1583                 FC_SYMBOLIC_NAME_SIZE + 1, )
1584 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1585 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1586                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1587
1588
1589 /* Private Host Attributes */
1590
1591 static ssize_t
1592 show_fc_private_host_tgtid_bind_type(struct device *dev,
1593                                      struct device_attribute *attr, char *buf)
1594 {
1595         struct Scsi_Host *shost = transport_class_to_shost(dev);
1596         const char *name;
1597
1598         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1599         if (!name)
1600                 return -EINVAL;
1601         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1602 }
1603
1604 #define get_list_head_entry(pos, head, member)          \
1605         pos = list_entry((head)->next, typeof(*pos), member)
1606
1607 static ssize_t
1608 store_fc_private_host_tgtid_bind_type(struct device *dev,
1609         struct device_attribute *attr, const char *buf, size_t count)
1610 {
1611         struct Scsi_Host *shost = transport_class_to_shost(dev);
1612         struct fc_rport *rport;
1613         enum fc_tgtid_binding_type val;
1614         unsigned long flags;
1615
1616         if (get_fc_tgtid_bind_type_match(buf, &val))
1617                 return -EINVAL;
1618
1619         /* if changing bind type, purge all unused consistent bindings */
1620         if (val != fc_host_tgtid_bind_type(shost)) {
1621                 spin_lock_irqsave(shost->host_lock, flags);
1622                 while (!list_empty(&fc_host_rport_bindings(shost))) {
1623                         get_list_head_entry(rport,
1624                                 &fc_host_rport_bindings(shost), peers);
1625                         list_del(&rport->peers);
1626                         rport->port_state = FC_PORTSTATE_DELETED;
1627                         fc_queue_work(shost, &rport->rport_delete_work);
1628                 }
1629                 spin_unlock_irqrestore(shost->host_lock, flags);
1630         }
1631
1632         fc_host_tgtid_bind_type(shost) = val;
1633         return count;
1634 }
1635
1636 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1637                         show_fc_private_host_tgtid_bind_type,
1638                         store_fc_private_host_tgtid_bind_type);
1639
1640 static ssize_t
1641 store_fc_private_host_issue_lip(struct device *dev,
1642         struct device_attribute *attr, const char *buf, size_t count)
1643 {
1644         struct Scsi_Host *shost = transport_class_to_shost(dev);
1645         struct fc_internal *i = to_fc_internal(shost->transportt);
1646         int ret;
1647
1648         /* ignore any data value written to the attribute */
1649         if (i->f->issue_fc_host_lip) {
1650                 ret = i->f->issue_fc_host_lip(shost);
1651                 return ret ? ret: count;
1652         }
1653
1654         return -ENOENT;
1655 }
1656
1657 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1658                         store_fc_private_host_issue_lip);
1659
1660 static ssize_t
1661 store_fc_private_host_dev_loss_tmo(struct device *dev,
1662                                    struct device_attribute *attr,
1663                                    const char *buf, size_t count)
1664 {
1665         struct Scsi_Host *shost = transport_class_to_shost(dev);
1666         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1667         struct fc_rport *rport;
1668         unsigned long val, flags;
1669         int rc;
1670
1671         rc = fc_str_to_dev_loss(buf, &val);
1672         if (rc)
1673                 return rc;
1674
1675         fc_host_dev_loss_tmo(shost) = val;
1676         spin_lock_irqsave(shost->host_lock, flags);
1677         list_for_each_entry(rport, &fc_host->rports, peers)
1678                 fc_rport_set_dev_loss_tmo(rport, val);
1679         spin_unlock_irqrestore(shost->host_lock, flags);
1680         return count;
1681 }
1682
1683 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1684 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1685                       show_fc_host_dev_loss_tmo,
1686                       store_fc_private_host_dev_loss_tmo);
1687
1688 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1689
1690 /*
1691  * Host Statistics Management
1692  */
1693
1694 /* Show a given an attribute in the statistics group */
1695 static ssize_t
1696 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1697 {
1698         struct Scsi_Host *shost = transport_class_to_shost(dev);
1699         struct fc_internal *i = to_fc_internal(shost->transportt);
1700         struct fc_host_statistics *stats;
1701         ssize_t ret = -ENOENT;
1702
1703         if (offset > sizeof(struct fc_host_statistics) ||
1704             offset % sizeof(u64) != 0)
1705                 WARN_ON(1);
1706
1707         if (i->f->get_fc_host_stats) {
1708                 stats = (i->f->get_fc_host_stats)(shost);
1709                 if (stats)
1710                         ret = snprintf(buf, 20, "0x%llx\n",
1711                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1712         }
1713         return ret;
1714 }
1715
1716
1717 /* generate a read-only statistics attribute */
1718 #define fc_host_statistic(name)                                         \
1719 static ssize_t show_fcstat_##name(struct device *cd,                    \
1720                                   struct device_attribute *attr,        \
1721                                   char *buf)                            \
1722 {                                                                       \
1723         return fc_stat_show(cd, buf,                                    \
1724                             offsetof(struct fc_host_statistics, name)); \
1725 }                                                                       \
1726 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1727
1728 fc_host_statistic(seconds_since_last_reset);
1729 fc_host_statistic(tx_frames);
1730 fc_host_statistic(tx_words);
1731 fc_host_statistic(rx_frames);
1732 fc_host_statistic(rx_words);
1733 fc_host_statistic(lip_count);
1734 fc_host_statistic(nos_count);
1735 fc_host_statistic(error_frames);
1736 fc_host_statistic(dumped_frames);
1737 fc_host_statistic(link_failure_count);
1738 fc_host_statistic(loss_of_sync_count);
1739 fc_host_statistic(loss_of_signal_count);
1740 fc_host_statistic(prim_seq_protocol_err_count);
1741 fc_host_statistic(invalid_tx_word_count);
1742 fc_host_statistic(invalid_crc_count);
1743 fc_host_statistic(fcp_input_requests);
1744 fc_host_statistic(fcp_output_requests);
1745 fc_host_statistic(fcp_control_requests);
1746 fc_host_statistic(fcp_input_megabytes);
1747 fc_host_statistic(fcp_output_megabytes);
1748 fc_host_statistic(fcp_packet_alloc_failures);
1749 fc_host_statistic(fcp_packet_aborts);
1750 fc_host_statistic(fcp_frame_alloc_failures);
1751 fc_host_statistic(fc_no_free_exch);
1752 fc_host_statistic(fc_no_free_exch_xid);
1753 fc_host_statistic(fc_xid_not_found);
1754 fc_host_statistic(fc_xid_busy);
1755 fc_host_statistic(fc_seq_not_found);
1756 fc_host_statistic(fc_non_bls_resp);
1757
1758 static ssize_t
1759 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1760                     const char *buf, size_t count)
1761 {
1762         struct Scsi_Host *shost = transport_class_to_shost(dev);
1763         struct fc_internal *i = to_fc_internal(shost->transportt);
1764
1765         /* ignore any data value written to the attribute */
1766         if (i->f->reset_fc_host_stats) {
1767                 i->f->reset_fc_host_stats(shost);
1768                 return count;
1769         }
1770
1771         return -ENOENT;
1772 }
1773 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1774                                 fc_reset_statistics);
1775
1776 static struct attribute *fc_statistics_attrs[] = {
1777         &device_attr_host_seconds_since_last_reset.attr,
1778         &device_attr_host_tx_frames.attr,
1779         &device_attr_host_tx_words.attr,
1780         &device_attr_host_rx_frames.attr,
1781         &device_attr_host_rx_words.attr,
1782         &device_attr_host_lip_count.attr,
1783         &device_attr_host_nos_count.attr,
1784         &device_attr_host_error_frames.attr,
1785         &device_attr_host_dumped_frames.attr,
1786         &device_attr_host_link_failure_count.attr,
1787         &device_attr_host_loss_of_sync_count.attr,
1788         &device_attr_host_loss_of_signal_count.attr,
1789         &device_attr_host_prim_seq_protocol_err_count.attr,
1790         &device_attr_host_invalid_tx_word_count.attr,
1791         &device_attr_host_invalid_crc_count.attr,
1792         &device_attr_host_fcp_input_requests.attr,
1793         &device_attr_host_fcp_output_requests.attr,
1794         &device_attr_host_fcp_control_requests.attr,
1795         &device_attr_host_fcp_input_megabytes.attr,
1796         &device_attr_host_fcp_output_megabytes.attr,
1797         &device_attr_host_fcp_packet_alloc_failures.attr,
1798         &device_attr_host_fcp_packet_aborts.attr,
1799         &device_attr_host_fcp_frame_alloc_failures.attr,
1800         &device_attr_host_fc_no_free_exch.attr,
1801         &device_attr_host_fc_no_free_exch_xid.attr,
1802         &device_attr_host_fc_xid_not_found.attr,
1803         &device_attr_host_fc_xid_busy.attr,
1804         &device_attr_host_fc_seq_not_found.attr,
1805         &device_attr_host_fc_non_bls_resp.attr,
1806         &device_attr_host_reset_statistics.attr,
1807         NULL
1808 };
1809
1810 static struct attribute_group fc_statistics_group = {
1811         .name = "statistics",
1812         .attrs = fc_statistics_attrs,
1813 };
1814
1815
1816 /* Host Vport Attributes */
1817
1818 static int
1819 fc_parse_wwn(const char *ns, u64 *nm)
1820 {
1821         unsigned int i, j;
1822         u8 wwn[8];
1823
1824         memset(wwn, 0, sizeof(wwn));
1825
1826         /* Validate and store the new name */
1827         for (i=0, j=0; i < 16; i++) {
1828                 int value;
1829
1830                 value = hex_to_bin(*ns++);
1831                 if (value >= 0)
1832                         j = (j << 4) | value;
1833                 else
1834                         return -EINVAL;
1835                 if (i % 2) {
1836                         wwn[i/2] = j & 0xff;
1837                         j = 0;
1838                 }
1839         }
1840
1841         *nm = wwn_to_u64(wwn);
1842
1843         return 0;
1844 }
1845
1846
1847 /*
1848  * "Short-cut" sysfs variable to create a new vport on a FC Host.
1849  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1850  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1851  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1852  */
1853 static ssize_t
1854 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1855                            const char *buf, size_t count)
1856 {
1857         struct Scsi_Host *shost = transport_class_to_shost(dev);
1858         struct fc_vport_identifiers vid;
1859         struct fc_vport *vport;
1860         unsigned int cnt=count;
1861         int stat;
1862
1863         memset(&vid, 0, sizeof(vid));
1864
1865         /* count may include a LF at end of string */
1866         if (buf[cnt-1] == '\n')
1867                 cnt--;
1868
1869         /* validate we have enough characters for WWPN */
1870         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1871                 return -EINVAL;
1872
1873         stat = fc_parse_wwn(&buf[0], &vid.port_name);
1874         if (stat)
1875                 return stat;
1876
1877         stat = fc_parse_wwn(&buf[17], &vid.node_name);
1878         if (stat)
1879                 return stat;
1880
1881         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1882         vid.vport_type = FC_PORTTYPE_NPIV;
1883         /* vid.symbolic_name is already zero/NULL's */
1884         vid.disable = false;            /* always enabled */
1885
1886         /* we only allow support on Channel 0 !!! */
1887         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1888         return stat ? stat : count;
1889 }
1890 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1891                         store_fc_host_vport_create);
1892
1893
1894 /*
1895  * "Short-cut" sysfs variable to delete a vport on a FC Host.
1896  * Vport is identified by a string containing "<WWPN>:<WWNN>".
1897  * The WWNs are specified as hex characters, and may *not* contain
1898  * any prefixes (e.g. 0x, x, etc)
1899  */
1900 static ssize_t
1901 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1902                            const char *buf, size_t count)
1903 {
1904         struct Scsi_Host *shost = transport_class_to_shost(dev);
1905         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1906         struct fc_vport *vport;
1907         u64 wwpn, wwnn;
1908         unsigned long flags;
1909         unsigned int cnt=count;
1910         int stat, match;
1911
1912         /* count may include a LF at end of string */
1913         if (buf[cnt-1] == '\n')
1914                 cnt--;
1915
1916         /* validate we have enough characters for WWPN */
1917         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1918                 return -EINVAL;
1919
1920         stat = fc_parse_wwn(&buf[0], &wwpn);
1921         if (stat)
1922                 return stat;
1923
1924         stat = fc_parse_wwn(&buf[17], &wwnn);
1925         if (stat)
1926                 return stat;
1927
1928         spin_lock_irqsave(shost->host_lock, flags);
1929         match = 0;
1930         /* we only allow support on Channel 0 !!! */
1931         list_for_each_entry(vport, &fc_host->vports, peers) {
1932                 if ((vport->channel == 0) &&
1933                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1934                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1935                                 break;
1936                         vport->flags |= FC_VPORT_DELETING;
1937                         match = 1;
1938                         break;
1939                 }
1940         }
1941         spin_unlock_irqrestore(shost->host_lock, flags);
1942
1943         if (!match)
1944                 return -ENODEV;
1945
1946         stat = fc_vport_terminate(vport);
1947         return stat ? stat : count;
1948 }
1949 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1950                         store_fc_host_vport_delete);
1951
1952
1953 static int fc_host_match(struct attribute_container *cont,
1954                           struct device *dev)
1955 {
1956         struct Scsi_Host *shost;
1957         struct fc_internal *i;
1958
1959         if (!scsi_is_host_device(dev))
1960                 return 0;
1961
1962         shost = dev_to_shost(dev);
1963         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1964             != &fc_host_class.class)
1965                 return 0;
1966
1967         i = to_fc_internal(shost->transportt);
1968
1969         return &i->t.host_attrs.ac == cont;
1970 }
1971
1972 static int fc_target_match(struct attribute_container *cont,
1973                             struct device *dev)
1974 {
1975         struct Scsi_Host *shost;
1976         struct fc_internal *i;
1977
1978         if (!scsi_is_target_device(dev))
1979                 return 0;
1980
1981         shost = dev_to_shost(dev->parent);
1982         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1983             != &fc_host_class.class)
1984                 return 0;
1985
1986         i = to_fc_internal(shost->transportt);
1987
1988         return &i->t.target_attrs.ac == cont;
1989 }
1990
1991 static void fc_rport_dev_release(struct device *dev)
1992 {
1993         struct fc_rport *rport = dev_to_rport(dev);
1994         put_device(dev->parent);
1995         kfree(rport);
1996 }
1997
1998 int scsi_is_fc_rport(const struct device *dev)
1999 {
2000         return dev->release == fc_rport_dev_release;
2001 }
2002 EXPORT_SYMBOL(scsi_is_fc_rport);
2003
2004 static int fc_rport_match(struct attribute_container *cont,
2005                             struct device *dev)
2006 {
2007         struct Scsi_Host *shost;
2008         struct fc_internal *i;
2009
2010         if (!scsi_is_fc_rport(dev))
2011                 return 0;
2012
2013         shost = dev_to_shost(dev->parent);
2014         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2015             != &fc_host_class.class)
2016                 return 0;
2017
2018         i = to_fc_internal(shost->transportt);
2019
2020         return &i->rport_attr_cont.ac == cont;
2021 }
2022
2023
2024 static void fc_vport_dev_release(struct device *dev)
2025 {
2026         struct fc_vport *vport = dev_to_vport(dev);
2027         put_device(dev->parent);                /* release kobj parent */
2028         kfree(vport);
2029 }
2030
2031 static int scsi_is_fc_vport(const struct device *dev)
2032 {
2033         return dev->release == fc_vport_dev_release;
2034 }
2035
2036 static int fc_vport_match(struct attribute_container *cont,
2037                             struct device *dev)
2038 {
2039         struct fc_vport *vport;
2040         struct Scsi_Host *shost;
2041         struct fc_internal *i;
2042
2043         if (!scsi_is_fc_vport(dev))
2044                 return 0;
2045         vport = dev_to_vport(dev);
2046
2047         shost = vport_to_shost(vport);
2048         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2049             != &fc_host_class.class)
2050                 return 0;
2051
2052         i = to_fc_internal(shost->transportt);
2053         return &i->vport_attr_cont.ac == cont;
2054 }
2055
2056
2057 /**
2058  * fc_timed_out - FC Transport I/O timeout intercept handler
2059  * @scmd:       The SCSI command which timed out
2060  *
2061  * This routine protects against error handlers getting invoked while a
2062  * rport is in a blocked state, typically due to a temporarily loss of
2063  * connectivity. If the error handlers are allowed to proceed, requests
2064  * to abort i/o, reset the target, etc will likely fail as there is no way
2065  * to communicate with the device to perform the requested function. These
2066  * failures may result in the midlayer taking the device offline, requiring
2067  * manual intervention to restore operation.
2068  *
2069  * This routine, called whenever an i/o times out, validates the state of
2070  * the underlying rport. If the rport is blocked, it returns
2071  * EH_RESET_TIMER, which will continue to reschedule the timeout.
2072  * Eventually, either the device will return, or devloss_tmo will fire,
2073  * and when the timeout then fires, it will be handled normally.
2074  * If the rport is not blocked, normal error handling continues.
2075  *
2076  * Notes:
2077  *      This routine assumes no locks are held on entry.
2078  */
2079 static enum blk_eh_timer_return
2080 fc_timed_out(struct scsi_cmnd *scmd)
2081 {
2082         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2083
2084         if (rport->port_state == FC_PORTSTATE_BLOCKED)
2085                 return BLK_EH_RESET_TIMER;
2086
2087         return BLK_EH_NOT_HANDLED;
2088 }
2089
2090 /*
2091  * Called by fc_user_scan to locate an rport on the shost that
2092  * matches the channel and target id, and invoke scsi_scan_target()
2093  * on the rport.
2094  */
2095 static void
2096 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2097 {
2098         struct fc_rport *rport;
2099         unsigned long flags;
2100
2101         spin_lock_irqsave(shost->host_lock, flags);
2102
2103         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2104                 if (rport->scsi_target_id == -1)
2105                         continue;
2106
2107                 if (rport->port_state != FC_PORTSTATE_ONLINE)
2108                         continue;
2109
2110                 if ((channel == rport->channel) &&
2111                     (id == rport->scsi_target_id)) {
2112                         spin_unlock_irqrestore(shost->host_lock, flags);
2113                         scsi_scan_target(&rport->dev, channel, id, lun,
2114                                          SCSI_SCAN_MANUAL);
2115                         return;
2116                 }
2117         }
2118
2119         spin_unlock_irqrestore(shost->host_lock, flags);
2120 }
2121
2122 /*
2123  * Called via sysfs scan routines. Necessary, as the FC transport
2124  * wants to place all target objects below the rport object. So this
2125  * routine must invoke the scsi_scan_target() routine with the rport
2126  * object as the parent.
2127  */
2128 static int
2129 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2130 {
2131         uint chlo, chhi;
2132         uint tgtlo, tgthi;
2133
2134         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2135             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2136             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2137                 return -EINVAL;
2138
2139         if (channel == SCAN_WILD_CARD) {
2140                 chlo = 0;
2141                 chhi = shost->max_channel + 1;
2142         } else {
2143                 chlo = channel;
2144                 chhi = channel + 1;
2145         }
2146
2147         if (id == SCAN_WILD_CARD) {
2148                 tgtlo = 0;
2149                 tgthi = shost->max_id;
2150         } else {
2151                 tgtlo = id;
2152                 tgthi = id + 1;
2153         }
2154
2155         for ( ; chlo < chhi; chlo++)
2156                 for ( ; tgtlo < tgthi; tgtlo++)
2157                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2158
2159         return 0;
2160 }
2161
2162 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2163                                 int result)
2164 {
2165         struct fc_internal *i = to_fc_internal(shost->transportt);
2166         return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2167 }
2168
2169 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2170 {
2171         struct fc_internal *i = to_fc_internal(shost->transportt);
2172         return i->f->it_nexus_response(shost, nexus, result);
2173 }
2174
2175 struct scsi_transport_template *
2176 fc_attach_transport(struct fc_function_template *ft)
2177 {
2178         int count;
2179         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2180                                         GFP_KERNEL);
2181
2182         if (unlikely(!i))
2183                 return NULL;
2184
2185         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2186         i->t.target_attrs.ac.class = &fc_transport_class.class;
2187         i->t.target_attrs.ac.match = fc_target_match;
2188         i->t.target_size = sizeof(struct fc_starget_attrs);
2189         transport_container_register(&i->t.target_attrs);
2190
2191         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2192         i->t.host_attrs.ac.class = &fc_host_class.class;
2193         i->t.host_attrs.ac.match = fc_host_match;
2194         i->t.host_size = sizeof(struct fc_host_attrs);
2195         if (ft->get_fc_host_stats)
2196                 i->t.host_attrs.statistics = &fc_statistics_group;
2197         transport_container_register(&i->t.host_attrs);
2198
2199         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2200         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2201         i->rport_attr_cont.ac.match = fc_rport_match;
2202         transport_container_register(&i->rport_attr_cont);
2203
2204         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2205         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2206         i->vport_attr_cont.ac.match = fc_vport_match;
2207         transport_container_register(&i->vport_attr_cont);
2208
2209         i->f = ft;
2210
2211         /* Transport uses the shost workq for scsi scanning */
2212         i->t.create_work_queue = 1;
2213
2214         i->t.eh_timed_out = fc_timed_out;
2215
2216         i->t.user_scan = fc_user_scan;
2217
2218         /* target-mode drivers' functions */
2219         i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2220         i->t.it_nexus_response = fc_it_nexus_response;
2221
2222         /*
2223          * Setup SCSI Target Attributes.
2224          */
2225         count = 0;
2226         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2227         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2228         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2229
2230         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2231
2232         i->starget_attrs[count] = NULL;
2233
2234
2235         /*
2236          * Setup SCSI Host Attributes.
2237          */
2238         count=0;
2239         SETUP_HOST_ATTRIBUTE_RD(node_name);
2240         SETUP_HOST_ATTRIBUTE_RD(port_name);
2241         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2242         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2243         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2244         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2245         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2246         if (ft->vport_create) {
2247                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2248                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2249         }
2250         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2251         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2252         SETUP_HOST_ATTRIBUTE_RD(model);
2253         SETUP_HOST_ATTRIBUTE_RD(model_description);
2254         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2255         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2256         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2257         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2258
2259         SETUP_HOST_ATTRIBUTE_RD(port_id);
2260         SETUP_HOST_ATTRIBUTE_RD(port_type);
2261         SETUP_HOST_ATTRIBUTE_RD(port_state);
2262         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2263         SETUP_HOST_ATTRIBUTE_RD(speed);
2264         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2265         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2266         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2267
2268         /* Transport-managed attributes */
2269         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2270         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2271         if (ft->issue_fc_host_lip)
2272                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2273         if (ft->vport_create)
2274                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2275         if (ft->vport_delete)
2276                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2277
2278         BUG_ON(count > FC_HOST_NUM_ATTRS);
2279
2280         i->host_attrs[count] = NULL;
2281
2282         /*
2283          * Setup Remote Port Attributes.
2284          */
2285         count=0;
2286         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2287         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2288         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2289         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2290         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2291         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2292         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2293         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2294         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2295         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2296
2297         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2298
2299         i->rport_attrs[count] = NULL;
2300
2301         /*
2302          * Setup Virtual Port Attributes.
2303          */
2304         count=0;
2305         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2306         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2307         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2308         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2309         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2310         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2311         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2312         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2313         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2314
2315         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2316
2317         i->vport_attrs[count] = NULL;
2318
2319         return &i->t;
2320 }
2321 EXPORT_SYMBOL(fc_attach_transport);
2322
2323 void fc_release_transport(struct scsi_transport_template *t)
2324 {
2325         struct fc_internal *i = to_fc_internal(t);
2326
2327         transport_container_unregister(&i->t.target_attrs);
2328         transport_container_unregister(&i->t.host_attrs);
2329         transport_container_unregister(&i->rport_attr_cont);
2330         transport_container_unregister(&i->vport_attr_cont);
2331
2332         kfree(i);
2333 }
2334 EXPORT_SYMBOL(fc_release_transport);
2335
2336 /**
2337  * fc_queue_work - Queue work to the fc_host workqueue.
2338  * @shost:      Pointer to Scsi_Host bound to fc_host.
2339  * @work:       Work to queue for execution.
2340  *
2341  * Return value:
2342  *      1 - work queued for execution
2343  *      0 - work is already queued
2344  *      -EINVAL - work queue doesn't exist
2345  */
2346 static int
2347 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2348 {
2349         if (unlikely(!fc_host_work_q(shost))) {
2350                 printk(KERN_ERR
2351                         "ERROR: FC host '%s' attempted to queue work, "
2352                         "when no workqueue created.\n", shost->hostt->name);
2353                 dump_stack();
2354
2355                 return -EINVAL;
2356         }
2357
2358         return queue_work(fc_host_work_q(shost), work);
2359 }
2360
2361 /**
2362  * fc_flush_work - Flush a fc_host's workqueue.
2363  * @shost:      Pointer to Scsi_Host bound to fc_host.
2364  */
2365 static void
2366 fc_flush_work(struct Scsi_Host *shost)
2367 {
2368         if (!fc_host_work_q(shost)) {
2369                 printk(KERN_ERR
2370                         "ERROR: FC host '%s' attempted to flush work, "
2371                         "when no workqueue created.\n", shost->hostt->name);
2372                 dump_stack();
2373                 return;
2374         }
2375
2376         flush_workqueue(fc_host_work_q(shost));
2377 }
2378
2379 /**
2380  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2381  * @shost:      Pointer to Scsi_Host bound to fc_host.
2382  * @work:       Work to queue for execution.
2383  * @delay:      jiffies to delay the work queuing
2384  *
2385  * Return value:
2386  *      1 on success / 0 already queued / < 0 for error
2387  */
2388 static int
2389 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2390                                 unsigned long delay)
2391 {
2392         if (unlikely(!fc_host_devloss_work_q(shost))) {
2393                 printk(KERN_ERR
2394                         "ERROR: FC host '%s' attempted to queue work, "
2395                         "when no workqueue created.\n", shost->hostt->name);
2396                 dump_stack();
2397
2398                 return -EINVAL;
2399         }
2400
2401         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2402 }
2403
2404 /**
2405  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2406  * @shost:      Pointer to Scsi_Host bound to fc_host.
2407  */
2408 static void
2409 fc_flush_devloss(struct Scsi_Host *shost)
2410 {
2411         if (!fc_host_devloss_work_q(shost)) {
2412                 printk(KERN_ERR
2413                         "ERROR: FC host '%s' attempted to flush work, "
2414                         "when no workqueue created.\n", shost->hostt->name);
2415                 dump_stack();
2416                 return;
2417         }
2418
2419         flush_workqueue(fc_host_devloss_work_q(shost));
2420 }
2421
2422
2423 /**
2424  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2425  * @shost:      Which &Scsi_Host
2426  *
2427  * This routine is expected to be called immediately preceding the
2428  * a driver's call to scsi_remove_host().
2429  *
2430  * WARNING: A driver utilizing the fc_transport, which fails to call
2431  *   this routine prior to scsi_remove_host(), will leave dangling
2432  *   objects in /sys/class/fc_remote_ports. Access to any of these
2433  *   objects can result in a system crash !!!
2434  *
2435  * Notes:
2436  *      This routine assumes no locks are held on entry.
2437  */
2438 void
2439 fc_remove_host(struct Scsi_Host *shost)
2440 {
2441         struct fc_vport *vport = NULL, *next_vport = NULL;
2442         struct fc_rport *rport = NULL, *next_rport = NULL;
2443         struct workqueue_struct *work_q;
2444         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2445         unsigned long flags;
2446
2447         spin_lock_irqsave(shost->host_lock, flags);
2448
2449         /* Remove any vports */
2450         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2451                 fc_queue_work(shost, &vport->vport_delete_work);
2452
2453         /* Remove any remote ports */
2454         list_for_each_entry_safe(rport, next_rport,
2455                         &fc_host->rports, peers) {
2456                 list_del(&rport->peers);
2457                 rport->port_state = FC_PORTSTATE_DELETED;
2458                 fc_queue_work(shost, &rport->rport_delete_work);
2459         }
2460
2461         list_for_each_entry_safe(rport, next_rport,
2462                         &fc_host->rport_bindings, peers) {
2463                 list_del(&rport->peers);
2464                 rport->port_state = FC_PORTSTATE_DELETED;
2465                 fc_queue_work(shost, &rport->rport_delete_work);
2466         }
2467
2468         spin_unlock_irqrestore(shost->host_lock, flags);
2469
2470         /* flush all scan work items */
2471         scsi_flush_work(shost);
2472
2473         /* flush all stgt delete, and rport delete work items, then kill it  */
2474         if (fc_host->work_q) {
2475                 work_q = fc_host->work_q;
2476                 fc_host->work_q = NULL;
2477                 destroy_workqueue(work_q);
2478         }
2479
2480         /* flush all devloss work items, then kill it  */
2481         if (fc_host->devloss_work_q) {
2482                 work_q = fc_host->devloss_work_q;
2483                 fc_host->devloss_work_q = NULL;
2484                 destroy_workqueue(work_q);
2485         }
2486 }
2487 EXPORT_SYMBOL(fc_remove_host);
2488
2489 static void fc_terminate_rport_io(struct fc_rport *rport)
2490 {
2491         struct Scsi_Host *shost = rport_to_shost(rport);
2492         struct fc_internal *i = to_fc_internal(shost->transportt);
2493
2494         /* Involve the LLDD if possible to terminate all io on the rport. */
2495         if (i->f->terminate_rport_io)
2496                 i->f->terminate_rport_io(rport);
2497
2498         /*
2499          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2500          */
2501         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2502 }
2503
2504 /**
2505  * fc_starget_delete - called to delete the scsi descendants of an rport
2506  * @work:       remote port to be operated on.
2507  *
2508  * Deletes target and all sdevs.
2509  */
2510 static void
2511 fc_starget_delete(struct work_struct *work)
2512 {
2513         struct fc_rport *rport =
2514                 container_of(work, struct fc_rport, stgt_delete_work);
2515
2516         fc_terminate_rport_io(rport);
2517         scsi_remove_target(&rport->dev);
2518 }
2519
2520
2521 /**
2522  * fc_rport_final_delete - finish rport termination and delete it.
2523  * @work:       remote port to be deleted.
2524  */
2525 static void
2526 fc_rport_final_delete(struct work_struct *work)
2527 {
2528         struct fc_rport *rport =
2529                 container_of(work, struct fc_rport, rport_delete_work);
2530         struct device *dev = &rport->dev;
2531         struct Scsi_Host *shost = rport_to_shost(rport);
2532         struct fc_internal *i = to_fc_internal(shost->transportt);
2533         unsigned long flags;
2534         int do_callback = 0;
2535
2536         fc_terminate_rport_io(rport);
2537
2538         /*
2539          * if a scan is pending, flush the SCSI Host work_q so that
2540          * that we can reclaim the rport scan work element.
2541          */
2542         if (rport->flags & FC_RPORT_SCAN_PENDING)
2543                 scsi_flush_work(shost);
2544
2545         /*
2546          * Cancel any outstanding timers. These should really exist
2547          * only when rmmod'ing the LLDD and we're asking for
2548          * immediate termination of the rports
2549          */
2550         spin_lock_irqsave(shost->host_lock, flags);
2551         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2552                 spin_unlock_irqrestore(shost->host_lock, flags);
2553                 if (!cancel_delayed_work(&rport->fail_io_work))
2554                         fc_flush_devloss(shost);
2555                 if (!cancel_delayed_work(&rport->dev_loss_work))
2556                         fc_flush_devloss(shost);
2557                 cancel_work_sync(&rport->scan_work);
2558                 spin_lock_irqsave(shost->host_lock, flags);
2559                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2560         }
2561         spin_unlock_irqrestore(shost->host_lock, flags);
2562
2563         /* Delete SCSI target and sdevs */
2564         if (rport->scsi_target_id != -1)
2565                 fc_starget_delete(&rport->stgt_delete_work);
2566
2567         /*
2568          * Notify the driver that the rport is now dead. The LLDD will
2569          * also guarantee that any communication to the rport is terminated
2570          *
2571          * Avoid this call if we already called it when we preserved the
2572          * rport for the binding.
2573          */
2574         spin_lock_irqsave(shost->host_lock, flags);
2575         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2576             (i->f->dev_loss_tmo_callbk)) {
2577                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2578                 do_callback = 1;
2579         }
2580         spin_unlock_irqrestore(shost->host_lock, flags);
2581
2582         if (do_callback)
2583                 i->f->dev_loss_tmo_callbk(rport);
2584
2585         fc_bsg_remove(rport->rqst_q);
2586
2587         transport_remove_device(dev);
2588         device_del(dev);
2589         transport_destroy_device(dev);
2590         scsi_host_put(shost);                   /* for fc_host->rport list */
2591         put_device(dev);                        /* for self-reference */
2592 }
2593
2594
2595 /**
2596  * fc_remote_port_create - allocates and creates a remote FC port.
2597  * @shost:      scsi host the remote port is connected to.
2598  * @channel:    Channel on shost port connected to.
2599  * @ids:        The world wide names, fc address, and FC4 port
2600  *              roles for the remote port.
2601  *
2602  * Allocates and creates the remoter port structure, including the
2603  * class and sysfs creation.
2604  *
2605  * Notes:
2606  *      This routine assumes no locks are held on entry.
2607  */
2608 static struct fc_rport *
2609 fc_remote_port_create(struct Scsi_Host *shost, int channel,
2610                       struct fc_rport_identifiers  *ids)
2611 {
2612         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2613         struct fc_internal *fci = to_fc_internal(shost->transportt);
2614         struct fc_rport *rport;
2615         struct device *dev;
2616         unsigned long flags;
2617         int error;
2618         size_t size;
2619
2620         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2621         rport = kzalloc(size, GFP_KERNEL);
2622         if (unlikely(!rport)) {
2623                 printk(KERN_ERR "%s: allocation failure\n", __func__);
2624                 return NULL;
2625         }
2626
2627         rport->maxframe_size = -1;
2628         rport->supported_classes = FC_COS_UNSPECIFIED;
2629         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2630         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2631         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2632         rport->port_id = ids->port_id;
2633         rport->roles = ids->roles;
2634         rport->port_state = FC_PORTSTATE_ONLINE;
2635         if (fci->f->dd_fcrport_size)
2636                 rport->dd_data = &rport[1];
2637         rport->channel = channel;
2638         rport->fast_io_fail_tmo = -1;
2639
2640         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2641         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2642         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2643         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2644         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2645
2646         spin_lock_irqsave(shost->host_lock, flags);
2647
2648         rport->number = fc_host->next_rport_number++;
2649         if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2650                 rport->scsi_target_id = fc_host->next_target_id++;
2651         else
2652                 rport->scsi_target_id = -1;
2653         list_add_tail(&rport->peers, &fc_host->rports);
2654         scsi_host_get(shost);                   /* for fc_host->rport list */
2655
2656         spin_unlock_irqrestore(shost->host_lock, flags);
2657
2658         dev = &rport->dev;
2659         device_initialize(dev);                 /* takes self reference */
2660         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2661         dev->release = fc_rport_dev_release;
2662         dev_set_name(dev, "rport-%d:%d-%d",
2663                      shost->host_no, channel, rport->number);
2664         transport_setup_device(dev);
2665
2666         error = device_add(dev);
2667         if (error) {
2668                 printk(KERN_ERR "FC Remote Port device_add failed\n");
2669                 goto delete_rport;
2670         }
2671         transport_add_device(dev);
2672         transport_configure_device(dev);
2673
2674         fc_bsg_rportadd(shost, rport);
2675         /* ignore any bsg add error - we just can't do sgio */
2676
2677         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2678                 /* initiate a scan of the target */
2679                 rport->flags |= FC_RPORT_SCAN_PENDING;
2680                 scsi_queue_work(shost, &rport->scan_work);
2681         }
2682
2683         return rport;
2684
2685 delete_rport:
2686         transport_destroy_device(dev);
2687         spin_lock_irqsave(shost->host_lock, flags);
2688         list_del(&rport->peers);
2689         scsi_host_put(shost);                   /* for fc_host->rport list */
2690         spin_unlock_irqrestore(shost->host_lock, flags);
2691         put_device(dev->parent);
2692         kfree(rport);
2693         return NULL;
2694 }
2695
2696 /**
2697  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2698  * @shost:      scsi host the remote port is connected to.
2699  * @channel:    Channel on shost port connected to.
2700  * @ids:        The world wide names, fc address, and FC4 port
2701  *              roles for the remote port.
2702  *
2703  * The LLDD calls this routine to notify the transport of the existence
2704  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2705  * of the port, it's FC address (port_id), and the FC4 roles that are
2706  * active for the port.
2707  *
2708  * For ports that are FCP targets (aka scsi targets), the FC transport
2709  * maintains consistent target id bindings on behalf of the LLDD.
2710  * A consistent target id binding is an assignment of a target id to
2711  * a remote port identifier, which persists while the scsi host is
2712  * attached. The remote port can disappear, then later reappear, and
2713  * it's target id assignment remains the same. This allows for shifts
2714  * in FC addressing (if binding by wwpn or wwnn) with no apparent
2715  * changes to the scsi subsystem which is based on scsi host number and
2716  * target id values.  Bindings are only valid during the attachment of
2717  * the scsi host. If the host detaches, then later re-attaches, target
2718  * id bindings may change.
2719  *
2720  * This routine is responsible for returning a remote port structure.
2721  * The routine will search the list of remote ports it maintains
2722  * internally on behalf of consistent target id mappings. If found, the
2723  * remote port structure will be reused. Otherwise, a new remote port
2724  * structure will be allocated.
2725  *
2726  * Whenever a remote port is allocated, a new fc_remote_port class
2727  * device is created.
2728  *
2729  * Should not be called from interrupt context.
2730  *
2731  * Notes:
2732  *      This routine assumes no locks are held on entry.
2733  */
2734 struct fc_rport *
2735 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2736         struct fc_rport_identifiers  *ids)
2737 {
2738         struct fc_internal *fci = to_fc_internal(shost->transportt);
2739         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2740         struct fc_rport *rport;
2741         unsigned long flags;
2742         int match = 0;
2743
2744         /* ensure any stgt delete functions are done */
2745         fc_flush_work(shost);
2746
2747         /*
2748          * Search the list of "active" rports, for an rport that has been
2749          * deleted, but we've held off the real delete while the target
2750          * is in a "blocked" state.
2751          */
2752         spin_lock_irqsave(shost->host_lock, flags);
2753
2754         list_for_each_entry(rport, &fc_host->rports, peers) {
2755
2756                 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2757                         (rport->channel == channel)) {
2758
2759                         switch (fc_host->tgtid_bind_type) {
2760                         case FC_TGTID_BIND_BY_WWPN:
2761                         case FC_TGTID_BIND_NONE:
2762                                 if (rport->port_name == ids->port_name)
2763                                         match = 1;
2764                                 break;
2765                         case FC_TGTID_BIND_BY_WWNN:
2766                                 if (rport->node_name == ids->node_name)
2767                                         match = 1;
2768                                 break;
2769                         case FC_TGTID_BIND_BY_ID:
2770                                 if (rport->port_id == ids->port_id)
2771                                         match = 1;
2772                                 break;
2773                         }
2774
2775                         if (match) {
2776
2777                                 memcpy(&rport->node_name, &ids->node_name,
2778                                         sizeof(rport->node_name));
2779                                 memcpy(&rport->port_name, &ids->port_name,
2780                                         sizeof(rport->port_name));
2781                                 rport->port_id = ids->port_id;
2782
2783                                 rport->port_state = FC_PORTSTATE_ONLINE;
2784                                 rport->roles = ids->roles;
2785
2786                                 spin_unlock_irqrestore(shost->host_lock, flags);
2787
2788                                 if (fci->f->dd_fcrport_size)
2789                                         memset(rport->dd_data, 0,
2790                                                 fci->f->dd_fcrport_size);
2791
2792                                 /*
2793                                  * If we were not a target, cancel the
2794                                  * io terminate and rport timers, and
2795                                  * we're done.
2796                                  *
2797                                  * If we were a target, but our new role
2798                                  * doesn't indicate a target, leave the
2799                                  * timers running expecting the role to
2800                                  * change as the target fully logs in. If
2801                                  * it doesn't, the target will be torn down.
2802                                  *
2803                                  * If we were a target, and our role shows
2804                                  * we're still a target, cancel the timers
2805                                  * and kick off a scan.
2806                                  */
2807
2808                                 /* was a target, not in roles */
2809                                 if ((rport->scsi_target_id != -1) &&
2810                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2811                                         return rport;
2812
2813                                 /*
2814                                  * Stop the fail io and dev_loss timers.
2815                                  * If they flush, the port_state will
2816                                  * be checked and will NOOP the function.
2817                                  */
2818                                 if (!cancel_delayed_work(&rport->fail_io_work))
2819                                         fc_flush_devloss(shost);
2820                                 if (!cancel_delayed_work(&rport->dev_loss_work))
2821                                         fc_flush_devloss(shost);
2822
2823                                 spin_lock_irqsave(shost->host_lock, flags);
2824
2825                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2826                                                   FC_RPORT_DEVLOSS_PENDING |
2827                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
2828
2829                                 spin_unlock_irqrestore(shost->host_lock, flags);
2830
2831                                 /* if target, initiate a scan */
2832                                 if (rport->scsi_target_id != -1) {
2833                                         scsi_target_unblock(&rport->dev,
2834                                                             SDEV_RUNNING);
2835                                         spin_lock_irqsave(shost->host_lock,
2836                                                           flags);
2837                                         rport->flags |= FC_RPORT_SCAN_PENDING;
2838                                         scsi_queue_work(shost,
2839                                                         &rport->scan_work);
2840                                         spin_unlock_irqrestore(shost->host_lock,
2841                                                         flags);
2842                                 }
2843
2844                                 fc_bsg_goose_queue(rport);
2845
2846                                 return rport;
2847                         }
2848                 }
2849         }
2850
2851         /*
2852          * Search the bindings array
2853          * Note: if never a FCP target, you won't be on this list
2854          */
2855         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2856
2857                 /* search for a matching consistent binding */
2858
2859                 list_for_each_entry(rport, &fc_host->rport_bindings,
2860                                         peers) {
2861                         if (rport->channel != channel)
2862                                 continue;
2863
2864                         switch (fc_host->tgtid_bind_type) {
2865                         case FC_TGTID_BIND_BY_WWPN:
2866                                 if (rport->port_name == ids->port_name)
2867                                         match = 1;
2868                                 break;
2869                         case FC_TGTID_BIND_BY_WWNN:
2870                                 if (rport->node_name == ids->node_name)
2871                                         match = 1;
2872                                 break;
2873                         case FC_TGTID_BIND_BY_ID:
2874                                 if (rport->port_id == ids->port_id)
2875                                         match = 1;
2876                                 break;
2877                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2878                                 break;
2879                         }
2880
2881                         if (match) {
2882                                 list_move_tail(&rport->peers, &fc_host->rports);
2883                                 break;
2884                         }
2885                 }
2886
2887                 if (match) {
2888                         memcpy(&rport->node_name, &ids->node_name,
2889                                 sizeof(rport->node_name));
2890                         memcpy(&rport->port_name, &ids->port_name,
2891                                 sizeof(rport->port_name));
2892                         rport->port_id = ids->port_id;
2893                         rport->roles = ids->roles;
2894                         rport->port_state = FC_PORTSTATE_ONLINE;
2895                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2896
2897                         if (fci->f->dd_fcrport_size)
2898                                 memset(rport->dd_data, 0,
2899                                                 fci->f->dd_fcrport_size);
2900                         spin_unlock_irqrestore(shost->host_lock, flags);
2901
2902                         if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
2903                                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
2904
2905                                 /* initiate a scan of the target */
2906                                 spin_lock_irqsave(shost->host_lock, flags);
2907                                 rport->flags |= FC_RPORT_SCAN_PENDING;
2908                                 scsi_queue_work(shost, &rport->scan_work);
2909                                 spin_unlock_irqrestore(shost->host_lock, flags);
2910                         }
2911                         return rport;
2912                 }
2913         }
2914
2915         spin_unlock_irqrestore(shost->host_lock, flags);
2916
2917         /* No consistent binding found - create new remote port entry */
2918         rport = fc_remote_port_create(shost, channel, ids);
2919
2920         return rport;
2921 }
2922 EXPORT_SYMBOL(fc_remote_port_add);
2923
2924
2925 /**
2926  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2927  * @rport:      The remote port that no longer exists
2928  *
2929  * The LLDD calls this routine to notify the transport that a remote
2930  * port is no longer part of the topology. Note: Although a port
2931  * may no longer be part of the topology, it may persist in the remote
2932  * ports displayed by the fc_host. We do this under 2 conditions:
2933  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2934  *   This allows the port to temporarily disappear, then reappear without
2935  *   disrupting the SCSI device tree attached to it. During the "blocked"
2936  *   period the port will still exist.
2937  * 2) If the port was a scsi target and disappears for longer than we
2938  *   expect, we'll delete the port and the tear down the SCSI device tree
2939  *   attached to it. However, we want to semi-persist the target id assigned
2940  *   to that port if it eventually does exist. The port structure will
2941  *   remain (although with minimal information) so that the target id
2942  *   bindings remails.
2943  *
2944  * If the remote port is not an FCP Target, it will be fully torn down
2945  * and deallocated, including the fc_remote_port class device.
2946  *
2947  * If the remote port is an FCP Target, the port will be placed in a
2948  * temporary blocked state. From the LLDD's perspective, the rport no
2949  * longer exists. From the SCSI midlayer's perspective, the SCSI target
2950  * exists, but all sdevs on it are blocked from further I/O. The following
2951  * is then expected.
2952  *
2953  *   If the remote port does not return (signaled by a LLDD call to
2954  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2955  *   scsi target is removed - killing all outstanding i/o and removing the
2956  *   scsi devices attached ot it. The port structure will be marked Not
2957  *   Present and be partially cleared, leaving only enough information to
2958  *   recognize the remote port relative to the scsi target id binding if
2959  *   it later appears.  The port will remain as long as there is a valid
2960  *   binding (e.g. until the user changes the binding type or unloads the
2961  *   scsi host with the binding).
2962  *
2963  *   If the remote port returns within the dev_loss_tmo value (and matches
2964  *   according to the target id binding type), the port structure will be
2965  *   reused. If it is no longer a SCSI target, the target will be torn
2966  *   down. If it continues to be a SCSI target, then the target will be
2967  *   unblocked (allowing i/o to be resumed), and a scan will be activated
2968  *   to ensure that all luns are detected.
2969  *
2970  * Called from normal process context only - cannot be called from interrupt.
2971  *
2972  * Notes:
2973  *      This routine assumes no locks are held on entry.
2974  */
2975 void
2976 fc_remote_port_delete(struct fc_rport  *rport)
2977 {
2978         struct Scsi_Host *shost = rport_to_shost(rport);
2979         unsigned long timeout = rport->dev_loss_tmo;
2980         unsigned long flags;
2981
2982         /*
2983          * No need to flush the fc_host work_q's, as all adds are synchronous.
2984          *
2985          * We do need to reclaim the rport scan work element, so eventually
2986          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2987          * there's still a scan pending.
2988          */
2989
2990         spin_lock_irqsave(shost->host_lock, flags);
2991
2992         if (rport->port_state != FC_PORTSTATE_ONLINE) {
2993                 spin_unlock_irqrestore(shost->host_lock, flags);
2994                 return;
2995         }
2996
2997         /*
2998          * In the past, we if this was not an FCP-Target, we would
2999          * unconditionally just jump to deleting the rport.
3000          * However, rports can be used as node containers by the LLDD,
3001          * and its not appropriate to just terminate the rport at the
3002          * first sign of a loss in connectivity. The LLDD may want to
3003          * send ELS traffic to re-validate the login. If the rport is
3004          * immediately deleted, it makes it inappropriate for a node
3005          * container.
3006          * So... we now unconditionally wait dev_loss_tmo before
3007          * destroying an rport.
3008          */
3009
3010         rport->port_state = FC_PORTSTATE_BLOCKED;
3011
3012         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3013
3014         spin_unlock_irqrestore(shost->host_lock, flags);
3015
3016         scsi_target_block(&rport->dev);
3017
3018         /* see if we need to kill io faster than waiting for device loss */
3019         if ((rport->fast_io_fail_tmo != -1) &&
3020             (rport->fast_io_fail_tmo < timeout))
3021                 fc_queue_devloss_work(shost, &rport->fail_io_work,
3022                                         rport->fast_io_fail_tmo * HZ);
3023
3024         /* cap the length the devices can be blocked until they are deleted */
3025         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3026 }
3027 EXPORT_SYMBOL(fc_remote_port_delete);
3028
3029 /**
3030  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3031  * @rport:      The remote port that changed.
3032  * @roles:      New roles for this port.
3033  *
3034  * Description: The LLDD calls this routine to notify the transport that the
3035  * roles on a remote port may have changed. The largest effect of this is
3036  * if a port now becomes a FCP Target, it must be allocated a
3037  * scsi target id.  If the port is no longer a FCP target, any
3038  * scsi target id value assigned to it will persist in case the
3039  * role changes back to include FCP Target. No changes in the scsi
3040  * midlayer will be invoked if the role changes (in the expectation
3041  * that the role will be resumed. If it doesn't normal error processing
3042  * will take place).
3043  *
3044  * Should not be called from interrupt context.
3045  *
3046  * Notes:
3047  *      This routine assumes no locks are held on entry.
3048  */
3049 void
3050 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3051 {
3052         struct Scsi_Host *shost = rport_to_shost(rport);
3053         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3054         unsigned long flags;
3055         int create = 0;
3056
3057         spin_lock_irqsave(shost->host_lock, flags);
3058         if (roles & FC_PORT_ROLE_FCP_TARGET) {
3059                 if (rport->scsi_target_id == -1) {
3060                         rport->scsi_target_id = fc_host->next_target_id++;
3061                         create = 1;
3062                 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3063                         create = 1;
3064         }
3065
3066         rport->roles = roles;
3067
3068         spin_unlock_irqrestore(shost->host_lock, flags);
3069
3070         if (create) {
3071                 /*
3072                  * There may have been a delete timer running on the
3073                  * port. Ensure that it is cancelled as we now know
3074                  * the port is an FCP Target.
3075                  * Note: we know the rport is exists and in an online
3076                  *  state as the LLDD would not have had an rport
3077                  *  reference to pass us.
3078                  *
3079                  * Take no action on the del_timer failure as the state
3080                  * machine state change will validate the
3081                  * transaction.
3082                  */
3083                 if (!cancel_delayed_work(&rport->fail_io_work))
3084                         fc_flush_devloss(shost);
3085                 if (!cancel_delayed_work(&rport->dev_loss_work))
3086                         fc_flush_devloss(shost);
3087
3088                 spin_lock_irqsave(shost->host_lock, flags);
3089                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3090                                   FC_RPORT_DEVLOSS_PENDING |
3091                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3092                 spin_unlock_irqrestore(shost->host_lock, flags);
3093
3094                 /* ensure any stgt delete functions are done */
3095                 fc_flush_work(shost);
3096
3097                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3098                 /* initiate a scan of the target */
3099                 spin_lock_irqsave(shost->host_lock, flags);
3100                 rport->flags |= FC_RPORT_SCAN_PENDING;
3101                 scsi_queue_work(shost, &rport->scan_work);
3102                 spin_unlock_irqrestore(shost->host_lock, flags);
3103         }
3104 }
3105 EXPORT_SYMBOL(fc_remote_port_rolechg);
3106
3107 /**
3108  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3109  * @work:       rport target that failed to reappear in the allotted time.
3110  *
3111  * Description: An attempt to delete a remote port blocks, and if it fails
3112  *              to return in the allotted time this gets called.
3113  */
3114 static void
3115 fc_timeout_deleted_rport(struct work_struct *work)
3116 {
3117         struct fc_rport *rport =
3118                 container_of(work, struct fc_rport, dev_loss_work.work);
3119         struct Scsi_Host *shost = rport_to_shost(rport);
3120         struct fc_internal *i = to_fc_internal(shost->transportt);
3121         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3122         unsigned long flags;
3123         int do_callback = 0;
3124
3125         spin_lock_irqsave(shost->host_lock, flags);
3126
3127         rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3128
3129         /*
3130          * If the port is ONLINE, then it came back. If it was a SCSI
3131          * target, validate it still is. If not, tear down the
3132          * scsi_target on it.
3133          */
3134         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3135             (rport->scsi_target_id != -1) &&
3136             !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3137                 dev_printk(KERN_ERR, &rport->dev,
3138                         "blocked FC remote port time out: no longer"
3139                         " a FCP target, removing starget\n");
3140                 spin_unlock_irqrestore(shost->host_lock, flags);
3141                 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3142                 fc_queue_work(shost, &rport->stgt_delete_work);
3143                 return;
3144         }
3145
3146         /* NOOP state - we're flushing workq's */
3147         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3148                 spin_unlock_irqrestore(shost->host_lock, flags);
3149                 dev_printk(KERN_ERR, &rport->dev,
3150                         "blocked FC remote port time out: leaving"
3151                         " rport%s alone\n",
3152                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3153                 return;
3154         }
3155
3156         if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3157             (rport->scsi_target_id == -1)) {
3158                 list_del(&rport->peers);
3159                 rport->port_state = FC_PORTSTATE_DELETED;
3160                 dev_printk(KERN_ERR, &rport->dev,
3161                         "blocked FC remote port time out: removing"
3162                         " rport%s\n",
3163                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3164                 fc_queue_work(shost, &rport->rport_delete_work);
3165                 spin_unlock_irqrestore(shost->host_lock, flags);
3166                 return;
3167         }
3168
3169         dev_printk(KERN_ERR, &rport->dev,
3170                 "blocked FC remote port time out: removing target and "
3171                 "saving binding\n");
3172
3173         list_move_tail(&rport->peers, &fc_host->rport_bindings);
3174
3175         /*
3176          * Note: We do not remove or clear the hostdata area. This allows
3177          *   host-specific target data to persist along with the
3178          *   scsi_target_id. It's up to the host to manage it's hostdata area.
3179          */
3180
3181         /*
3182          * Reinitialize port attributes that may change if the port comes back.
3183          */
3184         rport->maxframe_size = -1;
3185         rport->supported_classes = FC_COS_UNSPECIFIED;
3186         rport->roles = FC_PORT_ROLE_UNKNOWN;
3187         rport->port_state = FC_PORTSTATE_NOTPRESENT;
3188         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3189
3190         /*
3191          * Pre-emptively kill I/O rather than waiting for the work queue
3192          * item to teardown the starget. (FCOE libFC folks prefer this
3193          * and to have the rport_port_id still set when it's done).
3194          */
3195         spin_unlock_irqrestore(shost->host_lock, flags);
3196         fc_terminate_rport_io(rport);
3197
3198         spin_lock_irqsave(shost->host_lock, flags);
3199
3200         if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {     /* still missing */
3201
3202                 /* remove the identifiers that aren't used in the consisting binding */
3203                 switch (fc_host->tgtid_bind_type) {
3204                 case FC_TGTID_BIND_BY_WWPN:
3205                         rport->node_name = -1;
3206                         rport->port_id = -1;
3207                         break;
3208                 case FC_TGTID_BIND_BY_WWNN:
3209                         rport->port_name = -1;
3210                         rport->port_id = -1;
3211                         break;
3212                 case FC_TGTID_BIND_BY_ID:
3213                         rport->node_name = -1;
3214                         rport->port_name = -1;
3215                         break;
3216                 case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
3217                         break;
3218                 }
3219
3220                 /*
3221                  * As this only occurs if the remote port (scsi target)
3222                  * went away and didn't come back - we'll remove
3223                  * all attached scsi devices.
3224                  */
3225                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3226                 fc_queue_work(shost, &rport->stgt_delete_work);
3227
3228                 do_callback = 1;
3229         }
3230
3231         spin_unlock_irqrestore(shost->host_lock, flags);
3232
3233         /*
3234          * Notify the driver that the rport is now dead. The LLDD will
3235          * also guarantee that any communication to the rport is terminated
3236          *
3237          * Note: we set the CALLBK_DONE flag above to correspond
3238          */
3239         if (do_callback && i->f->dev_loss_tmo_callbk)
3240                 i->f->dev_loss_tmo_callbk(rport);
3241 }
3242
3243
3244 /**
3245  * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3246  * @work:       rport to terminate io on.
3247  *
3248  * Notes: Only requests the failure of the io, not that all are flushed
3249  *    prior to returning.
3250  */
3251 static void
3252 fc_timeout_fail_rport_io(struct work_struct *work)
3253 {
3254         struct fc_rport *rport =
3255                 container_of(work, struct fc_rport, fail_io_work.work);
3256
3257         if (rport->port_state != FC_PORTSTATE_BLOCKED)
3258                 return;
3259
3260         rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3261         fc_terminate_rport_io(rport);
3262 }
3263
3264 /**
3265  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3266  * @work:       remote port to be scanned.
3267  */
3268 static void
3269 fc_scsi_scan_rport(struct work_struct *work)
3270 {
3271         struct fc_rport *rport =
3272                 container_of(work, struct fc_rport, scan_work);
3273         struct Scsi_Host *shost = rport_to_shost(rport);
3274         struct fc_internal *i = to_fc_internal(shost->transportt);
3275         unsigned long flags;
3276
3277         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3278             (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3279             !(i->f->disable_target_scan)) {
3280                 scsi_scan_target(&rport->dev, rport->channel,
3281                                  rport->scsi_target_id, SCAN_WILD_CARD,
3282                                  SCSI_SCAN_RESCAN);
3283         }
3284
3285         spin_lock_irqsave(shost->host_lock, flags);
3286         rport->flags &= ~FC_RPORT_SCAN_PENDING;
3287         spin_unlock_irqrestore(shost->host_lock, flags);
3288 }
3289
3290 /**
3291  * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3292  * @cmnd: SCSI command that scsi_eh is trying to recover
3293  *
3294  * This routine can be called from a FC LLD scsi_eh callback. It
3295  * blocks the scsi_eh thread until the fc_rport leaves the
3296  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3297  * necessary to avoid the scsi_eh failing recovery actions for blocked
3298  * rports which would lead to offlined SCSI devices.
3299  *
3300  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3301  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3302  *          passed back to scsi_eh.
3303  */
3304 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3305 {
3306         struct Scsi_Host *shost = cmnd->device->host;
3307         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3308         unsigned long flags;
3309
3310         spin_lock_irqsave(shost->host_lock, flags);
3311         while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3312                !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3313                 spin_unlock_irqrestore(shost->host_lock, flags);
3314                 msleep(1000);
3315                 spin_lock_irqsave(shost->host_lock, flags);
3316         }
3317         spin_unlock_irqrestore(shost->host_lock, flags);
3318
3319         if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3320                 return FAST_IO_FAIL;
3321
3322         return 0;
3323 }
3324 EXPORT_SYMBOL(fc_block_scsi_eh);
3325
3326 /**
3327  * fc_vport_setup - allocates and creates a FC virtual port.
3328  * @shost:      scsi host the virtual port is connected to.
3329  * @channel:    Channel on shost port connected to.
3330  * @pdev:       parent device for vport
3331  * @ids:        The world wide names, FC4 port roles, etc for
3332  *              the virtual port.
3333  * @ret_vport:  The pointer to the created vport.
3334  *
3335  * Allocates and creates the vport structure, calls the parent host
3336  * to instantiate the vport, the completes w/ class and sysfs creation.
3337  *
3338  * Notes:
3339  *      This routine assumes no locks are held on entry.
3340  */
3341 static int
3342 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3343         struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
3344 {
3345         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3346         struct fc_internal *fci = to_fc_internal(shost->transportt);
3347         struct fc_vport *vport;
3348         struct device *dev;
3349         unsigned long flags;
3350         size_t size;
3351         int error;
3352
3353         *ret_vport = NULL;
3354
3355         if ( ! fci->f->vport_create)
3356                 return -ENOENT;
3357
3358         size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3359         vport = kzalloc(size, GFP_KERNEL);
3360         if (unlikely(!vport)) {
3361                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3362                 return -ENOMEM;
3363         }
3364
3365         vport->vport_state = FC_VPORT_UNKNOWN;
3366         vport->vport_last_state = FC_VPORT_UNKNOWN;
3367         vport->node_name = ids->node_name;
3368         vport->port_name = ids->port_name;
3369         vport->roles = ids->roles;
3370         vport->vport_type = ids->vport_type;
3371         if (fci->f->dd_fcvport_size)
3372                 vport->dd_data = &vport[1];
3373         vport->shost = shost;
3374         vport->channel = channel;
3375         vport->flags = FC_VPORT_CREATING;
3376         INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3377
3378         spin_lock_irqsave(shost->host_lock, flags);
3379
3380         if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3381                 spin_unlock_irqrestore(shost->host_lock, flags);
3382                 kfree(vport);
3383                 return -ENOSPC;
3384         }
3385         fc_host->npiv_vports_inuse++;
3386         vport->number = fc_host->next_vport_number++;
3387         list_add_tail(&vport->peers, &fc_host->vports);
3388         scsi_host_get(shost);                   /* for fc_host->vport list */
3389
3390         spin_unlock_irqrestore(shost->host_lock, flags);
3391
3392         dev = &vport->dev;
3393         device_initialize(dev);                 /* takes self reference */
3394         dev->parent = get_device(pdev);         /* takes parent reference */
3395         dev->release = fc_vport_dev_release;
3396         dev_set_name(dev, "vport-%d:%d-%d",
3397                      shost->host_no, channel, vport->number);
3398         transport_setup_device(dev);
3399
3400         error = device_add(dev);
3401         if (error) {
3402                 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3403                 goto delete_vport;
3404         }
3405         transport_add_device(dev);
3406         transport_configure_device(dev);
3407
3408         error = fci->f->vport_create(vport, ids->disable);
3409         if (error) {
3410                 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3411                 goto delete_vport_all;
3412         }
3413
3414         /*
3415          * if the parent isn't the physical adapter's Scsi_Host, ensure
3416          * the Scsi_Host at least contains ia symlink to the vport.
3417          */
3418         if (pdev != &shost->shost_gendev) {
3419                 error = sysfs_create_link(&shost->shost_gendev.kobj,
3420                                  &dev->kobj, dev_name(dev));
3421                 if (error)
3422                         printk(KERN_ERR
3423                                 "%s: Cannot create vport symlinks for "
3424                                 "%s, err=%d\n",
3425                                 __func__, dev_name(dev), error);
3426         }
3427         spin_lock_irqsave(shost->host_lock, flags);
3428         vport->flags &= ~FC_VPORT_CREATING;
3429         spin_unlock_irqrestore(shost->host_lock, flags);
3430
3431         dev_printk(KERN_NOTICE, pdev,
3432                         "%s created via shost%d channel %d\n", dev_name(dev),
3433                         shost->host_no, channel);
3434
3435         *ret_vport = vport;
3436
3437         return 0;
3438
3439 delete_vport_all:
3440         transport_remove_device(dev);
3441         device_del(dev);
3442 delete_vport:
3443         transport_destroy_device(dev);
3444         spin_lock_irqsave(shost->host_lock, flags);
3445         list_del(&vport->peers);
3446         scsi_host_put(shost);                   /* for fc_host->vport list */
3447         fc_host->npiv_vports_inuse--;
3448         spin_unlock_irqrestore(shost->host_lock, flags);
3449         put_device(dev->parent);
3450         kfree(vport);
3451
3452         return error;
3453 }
3454
3455 /**
3456  * fc_vport_create - Admin App or LLDD requests creation of a vport
3457  * @shost:      scsi host the virtual port is connected to.
3458  * @channel:    channel on shost port connected to.
3459  * @ids:        The world wide names, FC4 port roles, etc for
3460  *              the virtual port.
3461  *
3462  * Notes:
3463  *      This routine assumes no locks are held on entry.
3464  */
3465 struct fc_vport *
3466 fc_vport_create(struct Scsi_Host *shost, int channel,
3467         struct fc_vport_identifiers *ids)
3468 {
3469         int stat;
3470         struct fc_vport *vport;
3471
3472         stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3473                  ids, &vport);
3474         return stat ? NULL : vport;
3475 }
3476 EXPORT_SYMBOL(fc_vport_create);
3477
3478 /**
3479  * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3480  * @vport:      fc_vport to be terminated
3481  *
3482  * Calls the LLDD vport_delete() function, then deallocates and removes
3483  * the vport from the shost and object tree.
3484  *
3485  * Notes:
3486  *      This routine assumes no locks are held on entry.
3487  */
3488 int
3489 fc_vport_terminate(struct fc_vport *vport)
3490 {
3491         struct Scsi_Host *shost = vport_to_shost(vport);
3492         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3493         struct fc_internal *i = to_fc_internal(shost->transportt);
3494         struct device *dev = &vport->dev;
3495         unsigned long flags;
3496         int stat;
3497
3498         if (i->f->vport_delete)
3499                 stat = i->f->vport_delete(vport);
3500         else
3501                 stat = -ENOENT;
3502
3503         spin_lock_irqsave(shost->host_lock, flags);
3504         vport->flags &= ~FC_VPORT_DELETING;
3505         if (!stat) {
3506                 vport->flags |= FC_VPORT_DELETED;
3507                 list_del(&vport->peers);
3508                 fc_host->npiv_vports_inuse--;
3509                 scsi_host_put(shost);           /* for fc_host->vport list */
3510         }
3511         spin_unlock_irqrestore(shost->host_lock, flags);
3512
3513         if (stat)
3514                 return stat;
3515
3516         if (dev->parent != &shost->shost_gendev)
3517                 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3518         transport_remove_device(dev);
3519         device_del(dev);
3520         transport_destroy_device(dev);
3521
3522         /*
3523          * Removing our self-reference should mean our
3524          * release function gets called, which will drop the remaining
3525          * parent reference and free the data structure.
3526          */
3527         put_device(dev);                        /* for self-reference */
3528
3529         return 0; /* SUCCESS */
3530 }
3531 EXPORT_SYMBOL(fc_vport_terminate);
3532
3533 /**
3534  * fc_vport_sched_delete - workq-based delete request for a vport
3535  * @work:       vport to be deleted.
3536  */
3537 static void
3538 fc_vport_sched_delete(struct work_struct *work)
3539 {
3540         struct fc_vport *vport =
3541                 container_of(work, struct fc_vport, vport_delete_work);
3542         int stat;
3543
3544         stat = fc_vport_terminate(vport);
3545         if (stat)
3546                 dev_printk(KERN_ERR, vport->dev.parent,
3547                         "%s: %s could not be deleted created via "
3548                         "shost%d channel %d - error %d\n", __func__,
3549                         dev_name(&vport->dev), vport->shost->host_no,
3550                         vport->channel, stat);
3551 }
3552
3553
3554 /*
3555  * BSG support
3556  */
3557
3558 /**
3559  * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3560  *                  completed
3561  * @job:        fc_bsg_job that is complete
3562  * @result:     job reply result
3563  * @reply_payload_rcv_len: length of payload received
3564  */
3565 void fc_bsg_jobdone(struct bsg_job *job, int result,
3566                     unsigned int reply_payload_rcv_len)
3567 {
3568         struct request *req = job->req;
3569         struct request *rsp = req->next_rq;
3570         int err;
3571
3572         err = job->req->errors = result;
3573
3574         if (err < 0)
3575                 /* we're only returning the result field in the reply */
3576                 job->req->sense_len = sizeof(uint32_t);
3577         else
3578                 job->req->sense_len = job->reply_len;
3579
3580         /* we assume all request payload was transferred, residual == 0 */
3581         req->resid_len = 0;
3582
3583         if (rsp) {
3584                 WARN_ON(reply_payload_rcv_len > rsp->resid_len);
3585
3586                 /* set reply (bidi) residual */
3587                 rsp->resid_len -= min(reply_payload_rcv_len, rsp->resid_len);
3588         }
3589         blk_complete_request(req);
3590 }
3591 EXPORT_SYMBOL_GPL(fc_bsg_jobdone);
3592
3593 /**
3594  * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3595  * @rq:        BSG request that holds the job to be destroyed
3596  */
3597 static void fc_bsg_softirq_done(struct request *rq)
3598 {
3599         struct bsg_job *job = rq->special;
3600
3601         kref_put(&job->kref, bsg_destroy_job);
3602 }
3603
3604 /**
3605  * fc_bsg_job_timeout - handler for when a bsg request timesout
3606  * @req:        request that timed out
3607  */
3608 static enum blk_eh_timer_return
3609 fc_bsg_job_timeout(struct request *req)
3610 {
3611         struct bsg_job *job = (void *) req->special;
3612         struct Scsi_Host *shost = fc_bsg_to_shost(job);
3613         struct fc_rport *rport = fc_bsg_to_rport(job);
3614         struct fc_internal *i = to_fc_internal(shost->transportt);
3615         int err = 0, inflight = 0;
3616
3617         if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
3618                 return BLK_EH_RESET_TIMER;
3619
3620         inflight = kref_get_unless_zero(&job->kref);
3621
3622         if (inflight && i->f->bsg_timeout) {
3623                 /* call LLDD to abort the i/o as it has timed out */
3624                 err = i->f->bsg_timeout(job);
3625                 if (err == -EAGAIN) {
3626                         kref_put(&job->kref, bsg_destroy_job);
3627                         return BLK_EH_RESET_TIMER;
3628                 } else if (err)
3629                         printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3630                                 "abort failed with status %d\n", err);
3631         }
3632
3633         /* the blk_end_sync_io() doesn't check the error */
3634         if (!inflight)
3635                 return BLK_EH_NOT_HANDLED;
3636         else
3637                 return BLK_EH_HANDLED;
3638 }
3639
3640 static int
3641 fc_bsg_map_buffer(struct bsg_buffer *buf, struct request *req)
3642 {
3643         size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3644
3645         BUG_ON(!req->nr_phys_segments);
3646
3647         buf->sg_list = kzalloc(sz, GFP_KERNEL);
3648         if (!buf->sg_list)
3649                 return -ENOMEM;
3650         sg_init_table(buf->sg_list, req->nr_phys_segments);
3651         buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3652         buf->payload_len = blk_rq_bytes(req);
3653         return 0;
3654 }
3655
3656
3657 /**
3658  * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3659  *                   bsg request
3660  * @shost:      SCSI Host corresponding to the bsg object
3661  * @rport:      (optional) FC Remote Port corresponding to the bsg object
3662  * @req:        BSG request that needs a job structure
3663  */
3664 static int
3665 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3666         struct request *req)
3667 {
3668         struct fc_internal *i = to_fc_internal(shost->transportt);
3669         struct request *rsp = req->next_rq;
3670         struct bsg_job *job;
3671         int ret;
3672
3673         BUG_ON(req->special);
3674
3675         job = kzalloc(sizeof(struct bsg_job) + i->f->dd_bsg_size,
3676                         GFP_KERNEL);
3677         if (!job)
3678                 return -ENOMEM;
3679
3680         /*
3681          * Note: this is a bit silly.
3682          * The request gets formatted as a SGIO v4 ioctl request, which
3683          * then gets reformatted as a blk request, which then gets
3684          * reformatted as a fc bsg request. And on completion, we have
3685          * to wrap return results such that SGIO v4 thinks it was a scsi
3686          * status.  I hope this was all worth it.
3687          */
3688
3689         req->special = job;
3690         job->req = req;
3691         if (i->f->dd_bsg_size)
3692                 job->dd_data = (void *)&job[1];
3693         job->request = (struct fc_bsg_request *)req->cmd;
3694         job->request_len = req->cmd_len;
3695         job->reply = req->sense;
3696         job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3697                                                  * allocated */
3698         if (req->bio) {
3699                 ret = fc_bsg_map_buffer(&job->request_payload, req);
3700                 if (ret)
3701                         goto failjob_rls_job;
3702         }
3703         if (rsp && rsp->bio) {
3704                 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3705                 if (ret)
3706                         goto failjob_rls_rqst_payload;
3707         }
3708         if (rport)
3709                 job->dev = &rport->dev;
3710         else
3711                 job->dev = &shost->shost_gendev;
3712         get_device(job->dev);           /* take a reference for the request */
3713
3714         kref_init(&job->kref);
3715
3716         return 0;
3717
3718
3719 failjob_rls_rqst_payload:
3720         kfree(job->request_payload.sg_list);
3721 failjob_rls_job:
3722         kfree(job);
3723         return -ENOMEM;
3724 }
3725
3726
3727 enum fc_dispatch_result {
3728         FC_DISPATCH_BREAK,      /* on return, q is locked, break from q loop */
3729         FC_DISPATCH_LOCKED,     /* on return, q is locked, continue on */
3730         FC_DISPATCH_UNLOCKED,   /* on return, q is unlocked, continue on */
3731 };
3732
3733
3734 /**
3735  * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3736  * @q:          fc host request queue
3737  * @shost:      scsi host rport attached to
3738  * @job:        bsg job to be processed
3739  */
3740 static enum fc_dispatch_result
3741 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3742                          struct bsg_job *job)
3743 {
3744         struct fc_internal *i = to_fc_internal(shost->transportt);
3745         struct fc_bsg_request *bsg_request = job->request;
3746         struct fc_bsg_reply *bsg_reply = job->reply;
3747         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3748         int ret;
3749
3750         /* check if we really have all the request data needed */
3751         if (job->request_len < cmdlen) {
3752                 ret = -ENOMSG;
3753                 goto fail_host_msg;
3754         }
3755
3756         /* Validate the host command */
3757         switch (bsg_request->msgcode) {
3758         case FC_BSG_HST_ADD_RPORT:
3759                 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3760                 break;
3761
3762         case FC_BSG_HST_DEL_RPORT:
3763                 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3764                 break;
3765
3766         case FC_BSG_HST_ELS_NOLOGIN:
3767                 cmdlen += sizeof(struct fc_bsg_host_els);
3768                 /* there better be a xmt and rcv payloads */
3769                 if ((!job->request_payload.payload_len) ||
3770                     (!job->reply_payload.payload_len)) {
3771                         ret = -EINVAL;
3772                         goto fail_host_msg;
3773                 }
3774                 break;
3775
3776         case FC_BSG_HST_CT:
3777                 cmdlen += sizeof(struct fc_bsg_host_ct);
3778                 /* there better be xmt and rcv payloads */
3779                 if ((!job->request_payload.payload_len) ||
3780                     (!job->reply_payload.payload_len)) {
3781                         ret = -EINVAL;
3782                         goto fail_host_msg;
3783                 }
3784                 break;
3785
3786         case FC_BSG_HST_VENDOR:
3787                 cmdlen += sizeof(struct fc_bsg_host_vendor);
3788                 if ((shost->hostt->vendor_id == 0L) ||
3789                     (bsg_request->rqst_data.h_vendor.vendor_id !=
3790                         shost->hostt->vendor_id)) {
3791                         ret = -ESRCH;
3792                         goto fail_host_msg;
3793                 }
3794                 break;
3795
3796         default:
3797                 ret = -EBADR;
3798                 goto fail_host_msg;
3799         }
3800
3801         ret = i->f->bsg_request(job);
3802         if (!ret)
3803                 return FC_DISPATCH_UNLOCKED;
3804
3805 fail_host_msg:
3806         /* return the errno failure code as the only status */
3807         BUG_ON(job->reply_len < sizeof(uint32_t));
3808         bsg_reply->reply_payload_rcv_len = 0;
3809         bsg_reply->result = ret;
3810         job->reply_len = sizeof(uint32_t);
3811         fc_bsg_jobdone(job, bsg_reply->result,
3812                        bsg_reply->reply_payload_rcv_len);
3813         return FC_DISPATCH_UNLOCKED;
3814 }
3815
3816
3817 /*
3818  * fc_bsg_goose_queue - restart rport queue in case it was stopped
3819  * @rport:      rport to be restarted
3820  */
3821 static void
3822 fc_bsg_goose_queue(struct fc_rport *rport)
3823 {
3824         struct request_queue *q = rport->rqst_q;
3825         unsigned long flags;
3826
3827         if (!q)
3828                 return;
3829
3830         spin_lock_irqsave(q->queue_lock, flags);
3831         blk_run_queue_async(q);
3832         spin_unlock_irqrestore(q->queue_lock, flags);
3833 }
3834
3835 /**
3836  * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3837  * @q:          rport request queue
3838  * @shost:      scsi host rport attached to
3839  * @rport:      rport request destined to
3840  * @job:        bsg job to be processed
3841  */
3842 static enum fc_dispatch_result
3843 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3844                          struct fc_rport *rport, struct bsg_job *job)
3845 {
3846         struct fc_internal *i = to_fc_internal(shost->transportt);
3847         struct fc_bsg_request *bsg_request = job->request;
3848         struct fc_bsg_reply *bsg_reply = job->reply;
3849         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3850         int ret;
3851
3852         /* check if we really have all the request data needed */
3853         if (job->request_len < cmdlen) {
3854                 ret = -ENOMSG;
3855                 goto fail_rport_msg;
3856         }
3857
3858         /* Validate the rport command */
3859         switch (bsg_request->msgcode) {
3860         case FC_BSG_RPT_ELS:
3861                 cmdlen += sizeof(struct fc_bsg_rport_els);
3862                 goto check_bidi;
3863
3864         case FC_BSG_RPT_CT:
3865                 cmdlen += sizeof(struct fc_bsg_rport_ct);
3866 check_bidi:
3867                 /* there better be xmt and rcv payloads */
3868                 if ((!job->request_payload.payload_len) ||
3869                     (!job->reply_payload.payload_len)) {
3870                         ret = -EINVAL;
3871                         goto fail_rport_msg;
3872                 }
3873                 break;
3874         default:
3875                 ret = -EBADR;
3876                 goto fail_rport_msg;
3877         }
3878
3879         ret = i->f->bsg_request(job);
3880         if (!ret)
3881                 return FC_DISPATCH_UNLOCKED;
3882
3883 fail_rport_msg:
3884         /* return the errno failure code as the only status */
3885         BUG_ON(job->reply_len < sizeof(uint32_t));
3886         bsg_reply->reply_payload_rcv_len = 0;
3887         bsg_reply->result = ret;
3888         job->reply_len = sizeof(uint32_t);
3889         fc_bsg_jobdone(job, bsg_reply->result,
3890                        bsg_reply->reply_payload_rcv_len);
3891         return FC_DISPATCH_UNLOCKED;
3892 }
3893
3894
3895 /**
3896  * fc_bsg_request_handler - generic handler for bsg requests
3897  * @q:          request queue to manage
3898  * @shost:      Scsi_Host related to the bsg object
3899  * @rport:      FC remote port related to the bsg object (optional)
3900  * @dev:        device structure for bsg object
3901  */
3902 static void
3903 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3904                        struct fc_rport *rport, struct device *dev)
3905 {
3906         struct request *req;
3907         struct bsg_job *job;
3908         enum fc_dispatch_result ret;
3909         struct fc_bsg_reply *bsg_reply;
3910
3911         if (!get_device(dev))
3912                 return;
3913
3914         while (1) {
3915                 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3916                     !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3917                         break;
3918
3919                 req = blk_fetch_request(q);
3920                 if (!req)
3921                         break;
3922
3923                 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3924                         req->errors = -ENXIO;
3925                         spin_unlock_irq(q->queue_lock);
3926                         blk_end_request_all(req, -ENXIO);
3927                         spin_lock_irq(q->queue_lock);
3928                         continue;
3929                 }
3930
3931                 spin_unlock_irq(q->queue_lock);
3932
3933                 ret = fc_req_to_bsgjob(shost, rport, req);
3934                 if (ret) {
3935                         req->errors = ret;
3936                         blk_end_request_all(req, ret);
3937                         spin_lock_irq(q->queue_lock);
3938                         continue;
3939                 }
3940
3941                 job = req->special;
3942
3943                 /* check if we have the msgcode value at least */
3944                 if (job->request_len < sizeof(uint32_t)) {
3945                         BUG_ON(job->reply_len < sizeof(uint32_t));
3946                         bsg_reply = job->reply;
3947                         bsg_reply->reply_payload_rcv_len = 0;
3948                         bsg_reply->result = -ENOMSG;
3949                         job->reply_len = sizeof(uint32_t);
3950                         fc_bsg_jobdone(job, bsg_reply->result,
3951                                        bsg_reply->reply_payload_rcv_len);
3952                         spin_lock_irq(q->queue_lock);
3953                         continue;
3954                 }
3955
3956                 /* the dispatch routines will unlock the queue_lock */
3957                 if (rport)
3958                         ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3959                 else
3960                         ret = fc_bsg_host_dispatch(q, shost, job);
3961
3962                 /* did dispatcher hit state that can't process any more */
3963                 if (ret == FC_DISPATCH_BREAK)
3964                         break;
3965
3966                 /* did dispatcher had released the lock */
3967                 if (ret == FC_DISPATCH_UNLOCKED)
3968                         spin_lock_irq(q->queue_lock);
3969         }
3970
3971         spin_unlock_irq(q->queue_lock);
3972         put_device(dev);
3973         spin_lock_irq(q->queue_lock);
3974 }
3975
3976
3977 /**
3978  * fc_bsg_host_handler - handler for bsg requests for a fc host
3979  * @q:          fc host request queue
3980  */
3981 static void
3982 fc_bsg_host_handler(struct request_queue *q)
3983 {
3984         struct Scsi_Host *shost = q->queuedata;
3985
3986         fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
3987 }
3988
3989
3990 /**
3991  * fc_bsg_rport_handler - handler for bsg requests for a fc rport
3992  * @q:          rport request queue
3993  */
3994 static void
3995 fc_bsg_rport_handler(struct request_queue *q)
3996 {
3997         struct fc_rport *rport = q->queuedata;
3998         struct Scsi_Host *shost = rport_to_shost(rport);
3999
4000         fc_bsg_request_handler(q, shost, rport, &rport->dev);
4001 }
4002
4003
4004 /**
4005  * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4006  * @shost:      shost for fc_host
4007  * @fc_host:    fc_host adding the structures to
4008  */
4009 static int
4010 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4011 {
4012         struct device *dev = &shost->shost_gendev;
4013         struct fc_internal *i = to_fc_internal(shost->transportt);
4014         struct request_queue *q;
4015         int err;
4016         char bsg_name[20];
4017
4018         fc_host->rqst_q = NULL;
4019
4020         if (!i->f->bsg_request)
4021                 return -ENOTSUPP;
4022
4023         snprintf(bsg_name, sizeof(bsg_name),
4024                  "fc_host%d", shost->host_no);
4025
4026         q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4027         if (!q) {
4028                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4029                                 "initialize - no request queue\n",
4030                                  shost->host_no);
4031                 return -ENOMEM;
4032         }
4033
4034         q->queuedata = shost;
4035         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4036         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4037         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4038         blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4039
4040         err = bsg_register_queue(q, dev, bsg_name, NULL);
4041         if (err) {
4042                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4043                                 "initialize - register queue\n",
4044                                 shost->host_no);
4045                 blk_cleanup_queue(q);
4046                 return err;
4047         }
4048
4049         fc_host->rqst_q = q;
4050         return 0;
4051 }
4052
4053
4054 /**
4055  * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4056  * @shost:      shost that rport is attached to
4057  * @rport:      rport that the bsg hooks are being attached to
4058  */
4059 static int
4060 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4061 {
4062         struct device *dev = &rport->dev;
4063         struct fc_internal *i = to_fc_internal(shost->transportt);
4064         struct request_queue *q;
4065         int err;
4066
4067         rport->rqst_q = NULL;
4068
4069         if (!i->f->bsg_request)
4070                 return -ENOTSUPP;
4071
4072         q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4073         if (!q) {
4074                 printk(KERN_ERR "%s: bsg interface failed to "
4075                                 "initialize - no request queue\n",
4076                                  dev->kobj.name);
4077                 return -ENOMEM;
4078         }
4079
4080         q->queuedata = rport;
4081         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4082         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4083         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4084         blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4085
4086         err = bsg_register_queue(q, dev, NULL, NULL);
4087         if (err) {
4088                 printk(KERN_ERR "%s: bsg interface failed to "
4089                                 "initialize - register queue\n",
4090                                  dev->kobj.name);
4091                 blk_cleanup_queue(q);
4092                 return err;
4093         }
4094
4095         rport->rqst_q = q;
4096         return 0;
4097 }
4098
4099
4100 /**
4101  * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4102  * @q:  the request_queue that is to be torn down.
4103  *
4104  * Notes:
4105  *   Before unregistering the queue empty any requests that are blocked
4106  *
4107  *
4108  */
4109 static void
4110 fc_bsg_remove(struct request_queue *q)
4111 {
4112         if (q) {
4113                 bsg_unregister_queue(q);
4114                 blk_cleanup_queue(q);
4115         }
4116 }
4117
4118
4119 /* Original Author:  Martin Hicks */
4120 MODULE_AUTHOR("James Smart");
4121 MODULE_DESCRIPTION("FC Transport Attributes");
4122 MODULE_LICENSE("GPL");
4123
4124 module_init(fc_transport_init);
4125 module_exit(fc_transport_exit);