drivers/scsi/scsi_transport_fc.c

   1 /*
   2  *  FiberChannel transport specific attributes exported to sysfs.
   3  *
   4  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ========
  21  *
  22  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
  23  *    Rewrite for host, target, device, and remote port attributes,
  24  *    statistics, and service functions...
  25  *    Add vports, etc
  26  *
  27  */
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32 #include <linux/kernel.h>
  33 #include <scsi/scsi_device.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_transport.h>
  36 #include <scsi/scsi_transport_fc.h>
  37 #include <scsi/scsi_cmnd.h>
  38 #include <net/netlink.h>
  39 #include <scsi/scsi_netlink_fc.h>
  40 #include <scsi/scsi_bsg_fc.h>
  41 #include "scsi_priv.h"
  42 #include "scsi_transport_fc_internal.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_NOT_NEGOTIATED,  "Not Negotiated" },
 266 };
 267 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 268
 269
 270 static int
 271 show_fc_fc4s (char *buf, u8 *fc4_list)
 272 {
 273         int i, len=0;
 274
 275         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 276                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 277         len += sprintf(buf + len, "\n");
 278         return len;
 279 }
 280
 281
 282 /* Convert FC_PORT_ROLE bit values to ascii string name */
 283 static const struct {
 284         u32                     value;
 285         char                    *name;
 286 } fc_port_role_names[] = {
 287         { FC_PORT_ROLE_FCP_TARGET,      "FCP Target" },
 288         { FC_PORT_ROLE_FCP_INITIATOR,   "FCP Initiator" },
 289         { FC_PORT_ROLE_IP_PORT,         "IP Port" },
 290 };
 291 fc_bitfield_name_search(port_roles, fc_port_role_names)
 292
 293 /*
 294  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 295  */
 296 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 297 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 298 #define FC_FPORT_PORTID                 0x00000e
 299 #define FC_FABCTLR_PORTID               0x00000d
 300 #define FC_DIRSRVR_PORTID               0x00000c
 301 #define FC_TIMESRVR_PORTID              0x00000b
 302 #define FC_MGMTSRVR_PORTID              0x00000a
 303
 304
 305 static void fc_timeout_deleted_rport(struct work_struct *work);
 306 static void fc_timeout_fail_rport_io(struct work_struct *work);
 307 static void fc_scsi_scan_rport(struct work_struct *work);
 308
 309 /*
 310  * Attribute counts pre object type...
 311  * Increase these values if you add attributes
 312  */
 313 #define FC_STARGET_NUM_ATTRS    3
 314 #define FC_RPORT_NUM_ATTRS      10
 315 #define FC_VPORT_NUM_ATTRS      9
 316 #define FC_HOST_NUM_ATTRS       29
 317
 318 struct fc_internal {
 319         struct scsi_transport_template t;
 320         struct fc_function_template *f;
 321
 322         /*
 323          * For attributes : each object has :
 324          *   An array of the actual attributes structures
 325          *   An array of null-terminated pointers to the attribute
 326          *     structures - used for mid-layer interaction.
 327          *
 328          * The attribute containers for the starget and host are are
 329          * part of the midlayer. As the remote port is specific to the
 330          * fc transport, we must provide the attribute container.
 331          */
 332         struct device_attribute private_starget_attrs[
 333                                                         FC_STARGET_NUM_ATTRS];
 334         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 335
 336         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 337         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 338
 339         struct transport_container rport_attr_cont;
 340         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 341         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 342
 343         struct transport_container vport_attr_cont;
 344         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
 345         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
 346 };
 347
 348 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 349
 350 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 351                            struct device *cdev)
 352 {
 353         struct scsi_target *starget = to_scsi_target(dev);
 354         struct fc_rport *rport = starget_to_rport(starget);
 355
 356         /*
 357          * if parent is remote port, use values from remote port.
 358          * Otherwise, this host uses the fc_transport, but not the
 359          * remote port interface. As such, initialize to known non-values.
 360          */
 361         if (rport) {
 362                 fc_starget_node_name(starget) = rport->node_name;
 363                 fc_starget_port_name(starget) = rport->port_name;
 364                 fc_starget_port_id(starget) = rport->port_id;
 365         } else {
 366                 fc_starget_node_name(starget) = -1;
 367                 fc_starget_port_name(starget) = -1;
 368                 fc_starget_port_id(starget) = -1;
 369         }
 370
 371         return 0;
 372 }
 373
 374 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 375                                "fc_transport",
 376                                fc_target_setup,
 377                                NULL,
 378                                NULL);
 379
 380 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 381                          struct device *cdev)
 382 {
 383         struct Scsi_Host *shost = dev_to_shost(dev);
 384         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 385
 386         /*
 387          * Set default values easily detected by the midlayer as
 388          * failure cases.  The scsi lldd is responsible for initializing
 389          * all transport attributes to valid values per host.
 390          */
 391         fc_host->node_name = -1;
 392         fc_host->port_name = -1;
 393         fc_host->permanent_port_name = -1;
 394         fc_host->supported_classes = FC_COS_UNSPECIFIED;
 395         memset(fc_host->supported_fc4s, 0,
 396                 sizeof(fc_host->supported_fc4s));
 397         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
 398         fc_host->maxframe_size = -1;
 399         fc_host->max_npiv_vports = 0;
 400         memset(fc_host->serial_number, 0,
 401                 sizeof(fc_host->serial_number));
 402         memset(fc_host->manufacturer, 0,
 403                 sizeof(fc_host->manufacturer));
 404         memset(fc_host->model, 0,
 405                 sizeof(fc_host->model));
 406         memset(fc_host->model_description, 0,
 407                 sizeof(fc_host->model_description));
 408         memset(fc_host->hardware_version, 0,
 409                 sizeof(fc_host->hardware_version));
 410         memset(fc_host->driver_version, 0,
 411                 sizeof(fc_host->driver_version));
 412         memset(fc_host->firmware_version, 0,
 413                 sizeof(fc_host->firmware_version));
 414         memset(fc_host->optionrom_version, 0,
 415                 sizeof(fc_host->optionrom_version));
 416
 417         fc_host->port_id = -1;
 418         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
 419         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
 420         memset(fc_host->active_fc4s, 0,
 421                 sizeof(fc_host->active_fc4s));
 422         fc_host->speed = FC_PORTSPEED_UNKNOWN;
 423         fc_host->fabric_name = -1;
 424         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
 425         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
 426
 427         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
 428
 429         INIT_LIST_HEAD(&fc_host->rports);
 430         INIT_LIST_HEAD(&fc_host->rport_bindings);
 431         INIT_LIST_HEAD(&fc_host->vports);
 432         fc_host->next_rport_number = 0;
 433         fc_host->next_target_id = 0;
 434         fc_host->next_vport_number = 0;
 435         fc_host->npiv_vports_inuse = 0;
 436
 437         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
 438                  "fc_wq_%d", shost->host_no);
 439         fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
 440         if (!fc_host->work_q)
 441                 return -ENOMEM;
 442
 443         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
 444         snprintf(fc_host->devloss_work_q_name,
 445                  sizeof(fc_host->devloss_work_q_name),
 446                  "fc_dl_%d", shost->host_no);
 447         fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
 448                                         fc_host->devloss_work_q_name);
 449         if (!fc_host->devloss_work_q) {
 450                 destroy_workqueue(fc_host->work_q);
 451                 fc_host->work_q = NULL;
 452                 return -ENOMEM;
 453         }
 454
 455         fc_bsg_hostadd(shost, fc_host);
 456         /* ignore any bsg add error - we just can't do sgio */
 457
 458         return 0;
 459 }
 460
 461 static int fc_host_remove(struct transport_container *tc, struct device *dev,
 462                          struct device *cdev)
 463 {
 464         struct Scsi_Host *shost = dev_to_shost(dev);
 465         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 466
 467         fc_bsg_remove(fc_host->rqst_q);
 468         return 0;
 469 }
 470
 471 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 472                                "fc_host",
 473                                fc_host_setup,
 474                                fc_host_remove,
 475                                NULL);
 476
 477 /*
 478  * Setup and Remove actions for remote ports are handled
 479  * in the service functions below.
 480  */
 481 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 482                                "fc_remote_ports",
 483                                NULL,
 484                                NULL,
 485                                NULL);
 486
 487 /*
 488  * Setup and Remove actions for virtual ports are handled
 489  * in the service functions below.
 490  */
 491 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
 492                                "fc_vports",
 493                                NULL,
 494                                NULL,
 495                                NULL);
 496
 497 /*
 498  * Netlink Infrastructure
 499  */
 500
 501 static atomic_t fc_event_seq;
 502
 503 /**
 504  * fc_get_event_number - Obtain the next sequential FC event number
 505  *
 506  * Notes:
 507  *   We could have inlined this, but it would have required fc_event_seq to
 508  *   be exposed. For now, live with the subroutine call.
 509  *   Atomic used to avoid lock/unlock...
 510  */
 511 u32
 512 fc_get_event_number(void)
 513 {
 514         return atomic_add_return(1, &fc_event_seq);
 515 }
 516 EXPORT_SYMBOL(fc_get_event_number);
 517
 518
 519 /**
 520  * fc_host_post_event - called to post an even on an fc_host.
 521  * @shost:              host the event occurred on
 522  * @event_number:       fc event number obtained from get_fc_event_number()
 523  * @event_code:         fc_host event being posted
 524  * @event_data:         32bits of data for the event being posted
 525  *
 526  * Notes:
 527  *      This routine assumes no locks are held on entry.
 528  */
 529 void
 530 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 531                 enum fc_host_event_code event_code, u32 event_data)
 532 {
 533         struct sk_buff *skb;
 534         struct nlmsghdr *nlh;
 535         struct fc_nl_event *event;
 536         const char *name;
 537         u32 len;
 538         int err;
 539
 540         if (!scsi_nl_sock) {
 541                 err = -ENOENT;
 542                 goto send_fail;
 543         }
 544
 545         len = FC_NL_MSGALIGN(sizeof(*event));
 546
 547         skb = nlmsg_new(len, GFP_KERNEL);
 548         if (!skb) {
 549                 err = -ENOBUFS;
 550                 goto send_fail;
 551         }
 552
 553         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 554         if (!nlh) {
 555                 err = -ENOBUFS;
 556                 goto send_fail_skb;
 557         }
 558         event = nlmsg_data(nlh);
 559
 560         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 561                                 FC_NL_ASYNC_EVENT, len);
 562         event->seconds = get_seconds();
 563         event->vendor_id = 0;
 564         event->host_no = shost->host_no;
 565         event->event_datalen = sizeof(u32);     /* bytes */
 566         event->event_num = event_number;
 567         event->event_code = event_code;
 568         event->event_data = event_data;
 569
 570         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 571                         GFP_KERNEL);
 572         return;
 573
 574 send_fail_skb:
 575         kfree_skb(skb);
 576 send_fail:
 577         name = get_fc_host_event_code_name(event_code);
 578         printk(KERN_WARNING
 579                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
 580                 __func__, shost->host_no,
 581                 (name) ? name : "<unknown>", event_data, err);
 582         return;
 583 }
 584 EXPORT_SYMBOL(fc_host_post_event);
 585
 586
 587 /**
 588  * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
 589  * @shost:              host the event occurred on
 590  * @event_number:       fc event number obtained from get_fc_event_number()
 591  * @data_len:           amount, in bytes, of vendor unique data
 592  * @data_buf:           pointer to vendor unique data
 593  * @vendor_id:          Vendor id
 594  *
 595  * Notes:
 596  *      This routine assumes no locks are held on entry.
 597  */
 598 void
 599 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 600                 u32 data_len, char * data_buf, u64 vendor_id)
 601 {
 602         struct sk_buff *skb;
 603         struct nlmsghdr *nlh;
 604         struct fc_nl_event *event;
 605         u32 len;
 606         int err;
 607
 608         if (!scsi_nl_sock) {
 609                 err = -ENOENT;
 610                 goto send_vendor_fail;
 611         }
 612
 613         len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
 614
 615         skb = nlmsg_new(len, GFP_KERNEL);
 616         if (!skb) {
 617                 err = -ENOBUFS;
 618                 goto send_vendor_fail;
 619         }
 620
 621         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 622         if (!nlh) {
 623                 err = -ENOBUFS;
 624                 goto send_vendor_fail_skb;
 625         }
 626         event = nlmsg_data(nlh);
 627
 628         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 629                                 FC_NL_ASYNC_EVENT, len);
 630         event->seconds = get_seconds();
 631         event->vendor_id = vendor_id;
 632         event->host_no = shost->host_no;
 633         event->event_datalen = data_len;        /* bytes */
 634         event->event_num = event_number;
 635         event->event_code = FCH_EVT_VENDOR_UNIQUE;
 636         memcpy(&event->event_data, data_buf, data_len);
 637
 638         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 639                         GFP_KERNEL);
 640         return;
 641
 642 send_vendor_fail_skb:
 643         kfree_skb(skb);
 644 send_vendor_fail:
 645         printk(KERN_WARNING
 646                 "%s: Dropped Event : host %d vendor_unique - err %d\n",
 647                 __func__, shost->host_no, err);
 648         return;
 649 }
 650 EXPORT_SYMBOL(fc_host_post_vendor_event);
 651
 652
 653
 654 static __init int fc_transport_init(void)
 655 {
 656         int error;
 657
 658         atomic_set(&fc_event_seq, 0);
 659
 660         error = transport_class_register(&fc_host_class);
 661         if (error)
 662                 return error;
 663         error = transport_class_register(&fc_vport_class);
 664         if (error)
 665                 goto unreg_host_class;
 666         error = transport_class_register(&fc_rport_class);
 667         if (error)
 668                 goto unreg_vport_class;
 669         error = transport_class_register(&fc_transport_class);
 670         if (error)
 671                 goto unreg_rport_class;
 672         return 0;
 673
 674 unreg_rport_class:
 675         transport_class_unregister(&fc_rport_class);
 676 unreg_vport_class:
 677         transport_class_unregister(&fc_vport_class);
 678 unreg_host_class:
 679         transport_class_unregister(&fc_host_class);
 680         return error;
 681 }
 682
 683 static void __exit fc_transport_exit(void)
 684 {
 685         transport_class_unregister(&fc_transport_class);
 686         transport_class_unregister(&fc_rport_class);
 687         transport_class_unregister(&fc_host_class);
 688         transport_class_unregister(&fc_vport_class);
 689 }
 690
 691 /*
 692  * FC Remote Port Attribute Management
 693  */
 694
 695 #define fc_rport_show_function(field, format_string, sz, cast)          \
 696 static ssize_t                                                          \
 697 show_fc_rport_##field (struct device *dev,                              \
 698                        struct device_attribute *attr, char *buf)        \
 699 {                                                                       \
 700         struct fc_rport *rport = transport_class_to_rport(dev);         \
 701         struct Scsi_Host *shost = rport_to_shost(rport);                \
 702         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 703         if ((i->f->get_rport_##field) &&                                \
 704             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 705               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 706               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 707                 i->f->get_rport_##field(rport);                         \
 708         return snprintf(buf, sz, format_string, cast rport->field);     \
 709 }
 710
 711 #define fc_rport_store_function(field)                                  \
 712 static ssize_t                                                          \
 713 store_fc_rport_##field(struct device *dev,                              \
 714                        struct device_attribute *attr,                   \
 715                        const char *buf, size_t count)                   \
 716 {                                                                       \
 717         int val;                                                        \
 718         struct fc_rport *rport = transport_class_to_rport(dev);         \
 719         struct Scsi_Host *shost = rport_to_shost(rport);                \
 720         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 721         char *cp;                                                       \
 722         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
 723             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
 724             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
 725                 return -EBUSY;                                          \
 726         val = simple_strtoul(buf, &cp, 0);                              \
 727         if (*cp && (*cp != '\n'))                                       \
 728                 return -EINVAL;                                         \
 729         i->f->set_rport_##field(rport, val);                            \
 730         return count;                                                   \
 731 }
 732
 733 #define fc_rport_rd_attr(field, format_string, sz)                      \
 734         fc_rport_show_function(field, format_string, sz, )              \
 735 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 736                          show_fc_rport_##field, NULL)
 737
 738 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
 739         fc_rport_show_function(field, format_string, sz, (cast))        \
 740 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 741                           show_fc_rport_##field, NULL)
 742
 743 #define fc_rport_rw_attr(field, format_string, sz)                      \
 744         fc_rport_show_function(field, format_string, sz, )              \
 745         fc_rport_store_function(field)                                  \
 746 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
 747                         show_fc_rport_##field,                          \
 748                         store_fc_rport_##field)
 749
 750
 751 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
 752 static ssize_t                                                          \
 753 show_fc_rport_##field (struct device *dev,                              \
 754                        struct device_attribute *attr, char *buf)        \
 755 {                                                                       \
 756         struct fc_rport *rport = transport_class_to_rport(dev);         \
 757         return snprintf(buf, sz, format_string, cast rport->field);     \
 758 }
 759
 760 #define fc_private_rport_rd_attr(field, format_string, sz)              \
 761         fc_private_rport_show_function(field, format_string, sz, )      \
 762 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 763                          show_fc_rport_##field, NULL)
 764
 765 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
 766         fc_private_rport_show_function(field, format_string, sz, (cast)) \
 767 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 768                           show_fc_rport_##field, NULL)
 769
 770
 771 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
 772 static ssize_t                                                          \
 773 show_fc_rport_##title (struct device *dev,                              \
 774                        struct device_attribute *attr, char *buf)        \
 775 {                                                                       \
 776         struct fc_rport *rport = transport_class_to_rport(dev);         \
 777         const char *name;                                               \
 778         name = get_fc_##title##_name(rport->title);                     \
 779         if (!name)                                                      \
 780                 return -EINVAL;                                         \
 781         return snprintf(buf, maxlen, "%s\n", name);                     \
 782 }                                                                       \
 783 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
 784                         show_fc_rport_##title, NULL)
 785
 786
 787 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
 788         i->private_rport_attrs[count] = device_attr_rport_##field; \
 789         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 790         i->private_rport_attrs[count].store = NULL;                     \
 791         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 792         if (i->f->show_rport_##field)                                   \
 793                 count++
 794
 795 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
 796         i->private_rport_attrs[count] = device_attr_rport_##field; \
 797         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 798         i->private_rport_attrs[count].store = NULL;                     \
 799         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 800         count++
 801
 802 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
 803         i->private_rport_attrs[count] = device_attr_rport_##field; \
 804         if (!i->f->set_rport_##field) {                                 \
 805                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
 806                 i->private_rport_attrs[count].store = NULL;             \
 807         }                                                               \
 808         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 809         if (i->f->show_rport_##field)                                   \
 810                 count++
 811
 812 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
 813 {                                                                       \
 814         i->private_rport_attrs[count] = device_attr_rport_##field; \
 815         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 816         count++;                                                        \
 817 }
 818
 819
 820 /* The FC Transport Remote Port Attributes: */
 821
 822 /* Fixed Remote Port Attributes */
 823
 824 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
 825
 826 static ssize_t
 827 show_fc_rport_supported_classes (struct device *dev,
 828                                  struct device_attribute *attr, char *buf)
 829 {
 830         struct fc_rport *rport = transport_class_to_rport(dev);
 831         if (rport->supported_classes == FC_COS_UNSPECIFIED)
 832                 return snprintf(buf, 20, "unspecified\n");
 833         return get_fc_cos_names(rport->supported_classes, buf);
 834 }
 835 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
 836                 show_fc_rport_supported_classes, NULL);
 837
 838 /* Dynamic Remote Port Attributes */
 839
 840 /*
 841  * dev_loss_tmo attribute
 842  */
 843 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
 844 {
 845         char *cp;
 846
 847         *val = simple_strtoul(buf, &cp, 0);
 848         if ((*cp && (*cp != '\n')) || (*val < 0))
 849                 return -EINVAL;
 850         /*
 851          * Check for overflow; dev_loss_tmo is u32
 852          */
 853         if (*val > UINT_MAX)
 854                 return -EINVAL;
 855
 856         return 0;
 857 }
 858
 859 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
 860                                      unsigned long val)
 861 {
 862         struct Scsi_Host *shost = rport_to_shost(rport);
 863         struct fc_internal *i = to_fc_internal(shost->transportt);
 864
 865         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 866             (rport->port_state == FC_PORTSTATE_DELETED) ||
 867             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 868                 return -EBUSY;
 869         /*
 870          * Check for overflow; dev_loss_tmo is u32
 871          */
 872         if (val > UINT_MAX)
 873                 return -EINVAL;
 874
 875         /*
 876          * If fast_io_fail is off we have to cap
 877          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
 878          */
 879         if (rport->fast_io_fail_tmo == -1 &&
 880             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
 881                 return -EINVAL;
 882
 883         i->f->set_rport_dev_loss_tmo(rport, val);
 884         return 0;
 885 }
 886
 887 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
 888 static ssize_t
 889 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 890                             const char *buf, size_t count)
 891 {
 892         struct fc_rport *rport = transport_class_to_rport(dev);
 893         unsigned long val;
 894         int rc;
 895
 896         rc = fc_str_to_dev_loss(buf, &val);
 897         if (rc)
 898                 return rc;
 899
 900         rc = fc_rport_set_dev_loss_tmo(rport, val);
 901         if (rc)
 902                 return rc;
 903         return count;
 904 }
 905 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
 906                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
 907
 908
 909 /* Private Remote Port Attributes */
 910
 911 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 912 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 913 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
 914
 915 static ssize_t
 916 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
 917                      char *buf)
 918 {
 919         struct fc_rport *rport = transport_class_to_rport(dev);
 920
 921         /* identify any roles that are port_id specific */
 922         if ((rport->port_id != -1) &&
 923             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
 924                                         FC_WELLKNOWN_PORTID_MASK) {
 925                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
 926                 case FC_FPORT_PORTID:
 927                         return snprintf(buf, 30, "Fabric Port\n");
 928                 case FC_FABCTLR_PORTID:
 929                         return snprintf(buf, 30, "Fabric Controller\n");
 930                 case FC_DIRSRVR_PORTID:
 931                         return snprintf(buf, 30, "Directory Server\n");
 932                 case FC_TIMESRVR_PORTID:
 933                         return snprintf(buf, 30, "Time Server\n");
 934                 case FC_MGMTSRVR_PORTID:
 935                         return snprintf(buf, 30, "Management Server\n");
 936                 default:
 937                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
 938                 }
 939         } else {
 940                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
 941                         return snprintf(buf, 20, "unknown\n");
 942                 return get_fc_port_roles_names(rport->roles, buf);
 943         }
 944 }
 945 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
 946                 show_fc_rport_roles, NULL);
 947
 948 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 949 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
 950
 951 /*
 952  * fast_io_fail_tmo attribute
 953  */
 954 static ssize_t
 955 show_fc_rport_fast_io_fail_tmo (struct device *dev,
 956                                 struct device_attribute *attr, char *buf)
 957 {
 958         struct fc_rport *rport = transport_class_to_rport(dev);
 959
 960         if (rport->fast_io_fail_tmo == -1)
 961                 return snprintf(buf, 5, "off\n");
 962         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
 963 }
 964
 965 static ssize_t
 966 store_fc_rport_fast_io_fail_tmo(struct device *dev,
 967                                 struct device_attribute *attr, const char *buf,
 968                                 size_t count)
 969 {
 970         int val;
 971         char *cp;
 972         struct fc_rport *rport = transport_class_to_rport(dev);
 973
 974         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 975             (rport->port_state == FC_PORTSTATE_DELETED) ||
 976             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 977                 return -EBUSY;
 978         if (strncmp(buf, "off", 3) == 0)
 979                 rport->fast_io_fail_tmo = -1;
 980         else {
 981                 val = simple_strtoul(buf, &cp, 0);
 982                 if ((*cp && (*cp != '\n')) || (val < 0))
 983                         return -EINVAL;
 984                 /*
 985                  * Cap fast_io_fail by dev_loss_tmo or
 986                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 987                  */
 988                 if ((val >= rport->dev_loss_tmo) ||
 989                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
 990                         return -EINVAL;
 991
 992                 rport->fast_io_fail_tmo = val;
 993         }
 994         return count;
 995 }
 996 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
 997         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
 998
 999
1000 /*
1001  * FC SCSI Target Attribute Management
1002  */
1003
1004 /*
1005  * Note: in the target show function we recognize when the remote
1006  *  port is in the hierarchy and do not allow the driver to get
1007  *  involved in sysfs functions. The driver only gets involved if
1008  *  it's the "old" style that doesn't use rports.
1009  */
1010 #define fc_starget_show_function(field, format_string, sz, cast)        \
1011 static ssize_t                                                          \
1012 show_fc_starget_##field (struct device *dev,                            \
1013                          struct device_attribute *attr, char *buf)      \
1014 {                                                                       \
1015         struct scsi_target *starget = transport_class_to_starget(dev);  \
1016         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1017         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1018         struct fc_rport *rport = starget_to_rport(starget);             \
1019         if (rport)                                                      \
1020                 fc_starget_##field(starget) = rport->field;             \
1021         else if (i->f->get_starget_##field)                             \
1022                 i->f->get_starget_##field(starget);                     \
1023         return snprintf(buf, sz, format_string,                         \
1024                 cast fc_starget_##field(starget));                      \
1025 }
1026
1027 #define fc_starget_rd_attr(field, format_string, sz)                    \
1028         fc_starget_show_function(field, format_string, sz, )            \
1029 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1030                          show_fc_starget_##field, NULL)
1031
1032 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1033         fc_starget_show_function(field, format_string, sz, (cast))      \
1034 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1035                           show_fc_starget_##field, NULL)
1036
1037 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1038         i->private_starget_attrs[count] = device_attr_starget_##field; \
1039         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1040         i->private_starget_attrs[count].store = NULL;                   \
1041         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1042         if (i->f->show_starget_##field)                                 \
1043                 count++
1044
1045 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1046         i->private_starget_attrs[count] = device_attr_starget_##field; \
1047         if (!i->f->set_starget_##field) {                               \
1048                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1049                 i->private_starget_attrs[count].store = NULL;           \
1050         }                                                               \
1051         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1052         if (i->f->show_starget_##field)                                 \
1053                 count++
1054
1055 /* The FC Transport SCSI Target Attributes: */
1056 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1057 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1058 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1059
1060
1061 /*
1062  * FC Virtual Port Attribute Management
1063  */
1064
1065 #define fc_vport_show_function(field, format_string, sz, cast)          \
1066 static ssize_t                                                          \
1067 show_fc_vport_##field (struct device *dev,                              \
1068                        struct device_attribute *attr, char *buf)        \
1069 {                                                                       \
1070         struct fc_vport *vport = transport_class_to_vport(dev);         \
1071         struct Scsi_Host *shost = vport_to_shost(vport);                \
1072         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1073         if ((i->f->get_vport_##field) &&                                \
1074             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1075                 i->f->get_vport_##field(vport);                         \
1076         return snprintf(buf, sz, format_string, cast vport->field);     \
1077 }
1078
1079 #define fc_vport_store_function(field)                                  \
1080 static ssize_t                                                          \
1081 store_fc_vport_##field(struct device *dev,                              \
1082                        struct device_attribute *attr,                   \
1083                        const char *buf, size_t count)                   \
1084 {                                                                       \
1085         int val;                                                        \
1086         struct fc_vport *vport = transport_class_to_vport(dev);         \
1087         struct Scsi_Host *shost = vport_to_shost(vport);                \
1088         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1089         char *cp;                                                       \
1090         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1091                 return -EBUSY;                                          \
1092         val = simple_strtoul(buf, &cp, 0);                              \
1093         if (*cp && (*cp != '\n'))                                       \
1094                 return -EINVAL;                                         \
1095         i->f->set_vport_##field(vport, val);                            \
1096         return count;                                                   \
1097 }
1098
1099 #define fc_vport_store_str_function(field, slen)                        \
1100 static ssize_t                                                          \
1101 store_fc_vport_##field(struct device *dev,                              \
1102                        struct device_attribute *attr,                   \
1103                        const char *buf, size_t count)                   \
1104 {                                                                       \
1105         struct fc_vport *vport = transport_class_to_vport(dev);         \
1106         struct Scsi_Host *shost = vport_to_shost(vport);                \
1107         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1108         unsigned int cnt=count;                                         \
1109                                                                         \
1110         /* count may include a LF at end of string */                   \
1111         if (buf[cnt-1] == '\n')                                         \
1112                 cnt--;                                                  \
1113         if (cnt > ((slen) - 1))                                         \
1114                 return -EINVAL;                                         \
1115         memcpy(vport->field, buf, cnt);                                 \
1116         i->f->set_vport_##field(vport);                                 \
1117         return count;                                                   \
1118 }
1119
1120 #define fc_vport_rd_attr(field, format_string, sz)                      \
1121         fc_vport_show_function(field, format_string, sz, )              \
1122 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1123                          show_fc_vport_##field, NULL)
1124
1125 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1126         fc_vport_show_function(field, format_string, sz, (cast))        \
1127 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1128                           show_fc_vport_##field, NULL)
1129
1130 #define fc_vport_rw_attr(field, format_string, sz)                      \
1131         fc_vport_show_function(field, format_string, sz, )              \
1132         fc_vport_store_function(field)                                  \
1133 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1134                         show_fc_vport_##field,                          \
1135                         store_fc_vport_##field)
1136
1137 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1138 static ssize_t                                                          \
1139 show_fc_vport_##field (struct device *dev,                              \
1140                        struct device_attribute *attr, char *buf)        \
1141 {                                                                       \
1142         struct fc_vport *vport = transport_class_to_vport(dev);         \
1143         return snprintf(buf, sz, format_string, cast vport->field);     \
1144 }
1145
1146 #define fc_private_vport_store_u32_function(field)                      \
1147 static ssize_t                                                          \
1148 store_fc_vport_##field(struct device *dev,                              \
1149                        struct device_attribute *attr,                   \
1150                        const char *buf, size_t count)                   \
1151 {                                                                       \
1152         u32 val;                                                        \
1153         struct fc_vport *vport = transport_class_to_vport(dev);         \
1154         char *cp;                                                       \
1155         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1156                 return -EBUSY;                                          \
1157         val = simple_strtoul(buf, &cp, 0);                              \
1158         if (*cp && (*cp != '\n'))                                       \
1159                 return -EINVAL;                                         \
1160         vport->field = val;                                             \
1161         return count;                                                   \
1162 }
1163
1164
1165 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1166         fc_private_vport_show_function(field, format_string, sz, )      \
1167 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1168                          show_fc_vport_##field, NULL)
1169
1170 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1171         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1172 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1173                           show_fc_vport_##field, NULL)
1174
1175 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1176         fc_private_vport_show_function(field, format_string, sz, )      \
1177         fc_private_vport_store_u32_function(field)                      \
1178 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1179                         show_fc_vport_##field,                          \
1180                         store_fc_vport_##field)
1181
1182
1183 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1184 static ssize_t                                                          \
1185 show_fc_vport_##title (struct device *dev,                              \
1186                        struct device_attribute *attr,                   \
1187                        char *buf)                                       \
1188 {                                                                       \
1189         struct fc_vport *vport = transport_class_to_vport(dev);         \
1190         const char *name;                                               \
1191         name = get_fc_##title##_name(vport->title);                     \
1192         if (!name)                                                      \
1193                 return -EINVAL;                                         \
1194         return snprintf(buf, maxlen, "%s\n", name);                     \
1195 }                                                                       \
1196 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1197                         show_fc_vport_##title, NULL)
1198
1199
1200 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1201         i->private_vport_attrs[count] = device_attr_vport_##field; \
1202         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1203         i->private_vport_attrs[count].store = NULL;                     \
1204         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1205         if (i->f->get_##field)                                          \
1206                 count++
1207         /* NOTE: Above MACRO differs: checks function not show bit */
1208
1209 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1210         i->private_vport_attrs[count] = device_attr_vport_##field; \
1211         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1212         i->private_vport_attrs[count].store = NULL;                     \
1213         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1214         count++
1215
1216 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1217         i->private_vport_attrs[count] = device_attr_vport_##field; \
1218         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1219         if (i->f->field)                                                \
1220                 count++
1221         /* NOTE: Above MACRO differs: checks function */
1222
1223 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1224         i->private_vport_attrs[count] = device_attr_vport_##field; \
1225         if (!i->f->set_vport_##field) {                                 \
1226                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1227                 i->private_vport_attrs[count].store = NULL;             \
1228         }                                                               \
1229         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1230         count++
1231         /* NOTE: Above MACRO differs: does not check show bit */
1232
1233 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1234 {                                                                       \
1235         i->private_vport_attrs[count] = device_attr_vport_##field; \
1236         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1237         count++;                                                        \
1238 }
1239
1240
1241 /* The FC Transport Virtual Port Attributes: */
1242
1243 /* Fixed Virtual Port Attributes */
1244
1245 /* Dynamic Virtual Port Attributes */
1246
1247 /* Private Virtual Port Attributes */
1248
1249 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1250 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1251 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1252 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1253
1254 static ssize_t
1255 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1256                      char *buf)
1257 {
1258         struct fc_vport *vport = transport_class_to_vport(dev);
1259
1260         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1261                 return snprintf(buf, 20, "unknown\n");
1262         return get_fc_port_roles_names(vport->roles, buf);
1263 }
1264 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1265
1266 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1267
1268 fc_private_vport_show_function(symbolic_name, "%s\n",
1269                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1270 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1271 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1272                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1273
1274 static ssize_t
1275 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1276                       const char *buf, size_t count)
1277 {
1278         struct fc_vport *vport = transport_class_to_vport(dev);
1279         struct Scsi_Host *shost = vport_to_shost(vport);
1280         unsigned long flags;
1281
1282         spin_lock_irqsave(shost->host_lock, flags);
1283         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1284                 spin_unlock_irqrestore(shost->host_lock, flags);
1285                 return -EBUSY;
1286         }
1287         vport->flags |= FC_VPORT_DELETING;
1288         spin_unlock_irqrestore(shost->host_lock, flags);
1289
1290         fc_queue_work(shost, &vport->vport_delete_work);
1291         return count;
1292 }
1293 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1294                         NULL, store_fc_vport_delete);
1295
1296
1297 /*
1298  * Enable/Disable vport
1299  *  Write "1" to disable, write "0" to enable
1300  */
1301 static ssize_t
1302 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1303                        const char *buf,
1304                            size_t count)
1305 {
1306         struct fc_vport *vport = transport_class_to_vport(dev);
1307         struct Scsi_Host *shost = vport_to_shost(vport);
1308         struct fc_internal *i = to_fc_internal(shost->transportt);
1309         int stat;
1310
1311         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1312                 return -EBUSY;
1313
1314         if (*buf == '0') {
1315                 if (vport->vport_state != FC_VPORT_DISABLED)
1316                         return -EALREADY;
1317         } else if (*buf == '1') {
1318                 if (vport->vport_state == FC_VPORT_DISABLED)
1319                         return -EALREADY;
1320         } else
1321                 return -EINVAL;
1322
1323         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1324         return stat ? stat : count;
1325 }
1326 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1327                         NULL, store_fc_vport_disable);
1328
1329
1330 /*
1331  * Host Attribute Management
1332  */
1333
1334 #define fc_host_show_function(field, format_string, sz, cast)           \
1335 static ssize_t                                                          \
1336 show_fc_host_##field (struct device *dev,                               \
1337                       struct device_attribute *attr, char *buf)         \
1338 {                                                                       \
1339         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1340         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1341         if (i->f->get_host_##field)                                     \
1342                 i->f->get_host_##field(shost);                          \
1343         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1344 }
1345
1346 #define fc_host_store_function(field)                                   \
1347 static ssize_t                                                          \
1348 store_fc_host_##field(struct device *dev,                               \
1349                       struct device_attribute *attr,                    \
1350                       const char *buf,  size_t count)                   \
1351 {                                                                       \
1352         int val;                                                        \
1353         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1354         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1355         char *cp;                                                       \
1356                                                                         \
1357         val = simple_strtoul(buf, &cp, 0);                              \
1358         if (*cp && (*cp != '\n'))                                       \
1359                 return -EINVAL;                                         \
1360         i->f->set_host_##field(shost, val);                             \
1361         return count;                                                   \
1362 }
1363
1364 #define fc_host_store_str_function(field, slen)                         \
1365 static ssize_t                                                          \
1366 store_fc_host_##field(struct device *dev,                               \
1367                       struct device_attribute *attr,                    \
1368                       const char *buf, size_t count)                    \
1369 {                                                                       \
1370         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1371         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1372         unsigned int cnt=count;                                         \
1373                                                                         \
1374         /* count may include a LF at end of string */                   \
1375         if (buf[cnt-1] == '\n')                                         \
1376                 cnt--;                                                  \
1377         if (cnt > ((slen) - 1))                                         \
1378                 return -EINVAL;                                         \
1379         memcpy(fc_host_##field(shost), buf, cnt);                       \
1380         i->f->set_host_##field(shost);                                  \
1381         return count;                                                   \
1382 }
1383
1384 #define fc_host_rd_attr(field, format_string, sz)                       \
1385         fc_host_show_function(field, format_string, sz, )               \
1386 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1387                          show_fc_host_##field, NULL)
1388
1389 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1390         fc_host_show_function(field, format_string, sz, (cast))         \
1391 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1392                           show_fc_host_##field, NULL)
1393
1394 #define fc_host_rw_attr(field, format_string, sz)                       \
1395         fc_host_show_function(field, format_string, sz, )               \
1396         fc_host_store_function(field)                                   \
1397 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1398                         show_fc_host_##field,                           \
1399                         store_fc_host_##field)
1400
1401 #define fc_host_rd_enum_attr(title, maxlen)                             \
1402 static ssize_t                                                          \
1403 show_fc_host_##title (struct device *dev,                               \
1404                       struct device_attribute *attr, char *buf)         \
1405 {                                                                       \
1406         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1407         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1408         const char *name;                                               \
1409         if (i->f->get_host_##title)                                     \
1410                 i->f->get_host_##title(shost);                          \
1411         name = get_fc_##title##_name(fc_host_##title(shost));           \
1412         if (!name)                                                      \
1413                 return -EINVAL;                                         \
1414         return snprintf(buf, maxlen, "%s\n", name);                     \
1415 }                                                                       \
1416 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1417
1418 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1419         i->private_host_attrs[count] = device_attr_host_##field;        \
1420         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1421         i->private_host_attrs[count].store = NULL;                      \
1422         i->host_attrs[count] = &i->private_host_attrs[count];           \
1423         if (i->f->show_host_##field)                                    \
1424                 count++
1425
1426 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1427         i->private_host_attrs[count] = device_attr_host_##field;        \
1428         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1429         i->private_host_attrs[count].store = NULL;                      \
1430         i->host_attrs[count] = &i->private_host_attrs[count];           \
1431         count++
1432
1433 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1434         i->private_host_attrs[count] = device_attr_host_##field;        \
1435         if (!i->f->set_host_##field) {                                  \
1436                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1437                 i->private_host_attrs[count].store = NULL;              \
1438         }                                                               \
1439         i->host_attrs[count] = &i->private_host_attrs[count];           \
1440         if (i->f->show_host_##field)                                    \
1441                 count++
1442
1443
1444 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1445 static ssize_t                                                          \
1446 show_fc_host_##field (struct device *dev,                               \
1447                       struct device_attribute *attr, char *buf)         \
1448 {                                                                       \
1449         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1450         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1451 }
1452
1453 #define fc_private_host_rd_attr(field, format_string, sz)               \
1454         fc_private_host_show_function(field, format_string, sz, )       \
1455 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1456                          show_fc_host_##field, NULL)
1457
1458 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1459         fc_private_host_show_function(field, format_string, sz, (cast)) \
1460 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1461                           show_fc_host_##field, NULL)
1462
1463 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1464         i->private_host_attrs[count] = device_attr_host_##field;        \
1465         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1466         i->private_host_attrs[count].store = NULL;                      \
1467         i->host_attrs[count] = &i->private_host_attrs[count];           \
1468         count++
1469
1470 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1471 {                                                                       \
1472         i->private_host_attrs[count] = device_attr_host_##field;        \
1473         i->host_attrs[count] = &i->private_host_attrs[count];           \
1474         count++;                                                        \
1475 }
1476
1477
1478 /* Fixed Host Attributes */
1479
1480 static ssize_t
1481 show_fc_host_supported_classes (struct device *dev,
1482                                 struct device_attribute *attr, char *buf)
1483 {
1484         struct Scsi_Host *shost = transport_class_to_shost(dev);
1485
1486         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1487                 return snprintf(buf, 20, "unspecified\n");
1488
1489         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1490 }
1491 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1492                 show_fc_host_supported_classes, NULL);
1493
1494 static ssize_t
1495 show_fc_host_supported_fc4s (struct device *dev,
1496                              struct device_attribute *attr, char *buf)
1497 {
1498         struct Scsi_Host *shost = transport_class_to_shost(dev);
1499         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1500 }
1501 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1502                 show_fc_host_supported_fc4s, NULL);
1503
1504 static ssize_t
1505 show_fc_host_supported_speeds (struct device *dev,
1506                                struct device_attribute *attr, char *buf)
1507 {
1508         struct Scsi_Host *shost = transport_class_to_shost(dev);
1509
1510         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1511                 return snprintf(buf, 20, "unknown\n");
1512
1513         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1514 }
1515 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1516                 show_fc_host_supported_speeds, NULL);
1517
1518
1519 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1520 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1521 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1522                              unsigned long long);
1523 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1524 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1525 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1526 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1527 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1528 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1529 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1530 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1531 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1532 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1533
1534
1535 /* Dynamic Host Attributes */
1536
1537 static ssize_t
1538 show_fc_host_active_fc4s (struct device *dev,
1539                           struct device_attribute *attr, char *buf)
1540 {
1541         struct Scsi_Host *shost = transport_class_to_shost(dev);
1542         struct fc_internal *i = to_fc_internal(shost->transportt);
1543
1544         if (i->f->get_host_active_fc4s)
1545                 i->f->get_host_active_fc4s(shost);
1546
1547         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1548 }
1549 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1550                 show_fc_host_active_fc4s, NULL);
1551
1552 static ssize_t
1553 show_fc_host_speed (struct device *dev,
1554                     struct device_attribute *attr, char *buf)
1555 {
1556         struct Scsi_Host *shost = transport_class_to_shost(dev);
1557         struct fc_internal *i = to_fc_internal(shost->transportt);
1558
1559         if (i->f->get_host_speed)
1560                 i->f->get_host_speed(shost);
1561
1562         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1563                 return snprintf(buf, 20, "unknown\n");
1564
1565         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1566 }
1567 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1568                 show_fc_host_speed, NULL);
1569
1570
1571 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1572 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1573 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1574 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1575 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1576
1577 fc_private_host_show_function(system_hostname, "%s\n",
1578                 FC_SYMBOLIC_NAME_SIZE + 1, )
1579 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1580 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1581                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1582
1583
1584 /* Private Host Attributes */
1585
1586 static ssize_t
1587 show_fc_private_host_tgtid_bind_type(struct device *dev,
1588                                      struct device_attribute *attr, char *buf)
1589 {
1590         struct Scsi_Host *shost = transport_class_to_shost(dev);
1591         const char *name;
1592
1593         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1594         if (!name)
1595                 return -EINVAL;
1596         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1597 }
1598
1599 #define get_list_head_entry(pos, head, member)          \
1600         pos = list_entry((head)->next, typeof(*pos), member)
1601
1602 static ssize_t
1603 store_fc_private_host_tgtid_bind_type(struct device *dev,
1604         struct device_attribute *attr, const char *buf, size_t count)
1605 {
1606         struct Scsi_Host *shost = transport_class_to_shost(dev);
1607         struct fc_rport *rport;
1608         enum fc_tgtid_binding_type val;
1609         unsigned long flags;
1610
1611         if (get_fc_tgtid_bind_type_match(buf, &val))
1612                 return -EINVAL;
1613
1614         /* if changing bind type, purge all unused consistent bindings */
1615         if (val != fc_host_tgtid_bind_type(shost)) {
1616                 spin_lock_irqsave(shost->host_lock, flags);
1617                 while (!list_empty(&fc_host_rport_bindings(shost))) {
1618                         get_list_head_entry(rport,
1619                                 &fc_host_rport_bindings(shost), peers);
1620                         list_del(&rport->peers);
1621                         rport->port_state = FC_PORTSTATE_DELETED;
1622                         fc_queue_work(shost, &rport->rport_delete_work);
1623                 }
1624                 spin_unlock_irqrestore(shost->host_lock, flags);
1625         }
1626
1627         fc_host_tgtid_bind_type(shost) = val;
1628         return count;
1629 }
1630
1631 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1632                         show_fc_private_host_tgtid_bind_type,
1633                         store_fc_private_host_tgtid_bind_type);
1634
1635 static ssize_t
1636 store_fc_private_host_issue_lip(struct device *dev,
1637         struct device_attribute *attr, const char *buf, size_t count)
1638 {
1639         struct Scsi_Host *shost = transport_class_to_shost(dev);
1640         struct fc_internal *i = to_fc_internal(shost->transportt);
1641         int ret;
1642
1643         /* ignore any data value written to the attribute */
1644         if (i->f->issue_fc_host_lip) {
1645                 ret = i->f->issue_fc_host_lip(shost);
1646                 return ret ? ret: count;
1647         }
1648
1649         return -ENOENT;
1650 }
1651
1652 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1653                         store_fc_private_host_issue_lip);
1654
1655 static ssize_t
1656 store_fc_private_host_dev_loss_tmo(struct device *dev,
1657                                    struct device_attribute *attr,
1658                                    const char *buf, size_t count)
1659 {
1660         struct Scsi_Host *shost = transport_class_to_shost(dev);
1661         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1662         struct fc_rport *rport;
1663         unsigned long val, flags;
1664         int rc;
1665
1666         rc = fc_str_to_dev_loss(buf, &val);
1667         if (rc)
1668                 return rc;
1669
1670         fc_host_dev_loss_tmo(shost) = val;
1671         spin_lock_irqsave(shost->host_lock, flags);
1672         list_for_each_entry(rport, &fc_host->rports, peers)
1673                 fc_rport_set_dev_loss_tmo(rport, val);
1674         spin_unlock_irqrestore(shost->host_lock, flags);
1675         return count;
1676 }
1677
1678 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1679 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1680                       show_fc_host_dev_loss_tmo,
1681                       store_fc_private_host_dev_loss_tmo);
1682
1683 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1684
1685 /*
1686  * Host Statistics Management
1687  */
1688
1689 /* Show a given an attribute in the statistics group */
1690 static ssize_t
1691 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1692 {
1693         struct Scsi_Host *shost = transport_class_to_shost(dev);
1694         struct fc_internal *i = to_fc_internal(shost->transportt);
1695         struct fc_host_statistics *stats;
1696         ssize_t ret = -ENOENT;
1697
1698         if (offset > sizeof(struct fc_host_statistics) ||
1699             offset % sizeof(u64) != 0)
1700                 WARN_ON(1);
1701
1702         if (i->f->get_fc_host_stats) {
1703                 stats = (i->f->get_fc_host_stats)(shost);
1704                 if (stats)
1705                         ret = snprintf(buf, 20, "0x%llx\n",
1706                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1707         }
1708         return ret;
1709 }
1710
1711
1712 /* generate a read-only statistics attribute */
1713 #define fc_host_statistic(name)                                         \
1714 static ssize_t show_fcstat_##name(struct device *cd,                    \
1715                                   struct device_attribute *attr,        \
1716                                   char *buf)                            \
1717 {                                                                       \
1718         return fc_stat_show(cd, buf,                                    \
1719                             offsetof(struct fc_host_statistics, name)); \
1720 }                                                                       \
1721 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1722
1723 fc_host_statistic(seconds_since_last_reset);
1724 fc_host_statistic(tx_frames);
1725 fc_host_statistic(tx_words);
1726 fc_host_statistic(rx_frames);
1727 fc_host_statistic(rx_words);
1728 fc_host_statistic(lip_count);
1729 fc_host_statistic(nos_count);
1730 fc_host_statistic(error_frames);
1731 fc_host_statistic(dumped_frames);
1732 fc_host_statistic(link_failure_count);
1733 fc_host_statistic(loss_of_sync_count);
1734 fc_host_statistic(loss_of_signal_count);
1735 fc_host_statistic(prim_seq_protocol_err_count);
1736 fc_host_statistic(invalid_tx_word_count);
1737 fc_host_statistic(invalid_crc_count);
1738 fc_host_statistic(fcp_input_requests);
1739 fc_host_statistic(fcp_output_requests);
1740 fc_host_statistic(fcp_control_requests);
1741 fc_host_statistic(fcp_input_megabytes);
1742 fc_host_statistic(fcp_output_megabytes);
1743 fc_host_statistic(fcp_packet_alloc_failures);
1744 fc_host_statistic(fcp_packet_aborts);
1745 fc_host_statistic(fcp_frame_alloc_failures);
1746 fc_host_statistic(fc_no_free_exch);
1747 fc_host_statistic(fc_no_free_exch_xid);
1748 fc_host_statistic(fc_xid_not_found);
1749 fc_host_statistic(fc_xid_busy);
1750 fc_host_statistic(fc_seq_not_found);
1751 fc_host_statistic(fc_non_bls_resp);
1752
1753 static ssize_t
1754 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1755                     const char *buf, size_t count)
1756 {
1757         struct Scsi_Host *shost = transport_class_to_shost(dev);
1758         struct fc_internal *i = to_fc_internal(shost->transportt);
1759
1760         /* ignore any data value written to the attribute */
1761         if (i->f->reset_fc_host_stats) {
1762                 i->f->reset_fc_host_stats(shost);
1763                 return count;
1764         }
1765
1766         return -ENOENT;
1767 }
1768 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1769                                 fc_reset_statistics);
1770
1771 static struct attribute *fc_statistics_attrs[] = {
1772         &device_attr_host_seconds_since_last_reset.attr,
1773         &device_attr_host_tx_frames.attr,
1774         &device_attr_host_tx_words.attr,
1775         &device_attr_host_rx_frames.attr,
1776         &device_attr_host_rx_words.attr,
1777         &device_attr_host_lip_count.attr,
1778         &device_attr_host_nos_count.attr,
1779         &device_attr_host_error_frames.attr,
1780         &device_attr_host_dumped_frames.attr,
1781         &device_attr_host_link_failure_count.attr,
1782         &device_attr_host_loss_of_sync_count.attr,
1783         &device_attr_host_loss_of_signal_count.attr,
1784         &device_attr_host_prim_seq_protocol_err_count.attr,
1785         &device_attr_host_invalid_tx_word_count.attr,
1786         &device_attr_host_invalid_crc_count.attr,
1787         &device_attr_host_fcp_input_requests.attr,
1788         &device_attr_host_fcp_output_requests.attr,
1789         &device_attr_host_fcp_control_requests.attr,
1790         &device_attr_host_fcp_input_megabytes.attr,
1791         &device_attr_host_fcp_output_megabytes.attr,
1792         &device_attr_host_fcp_packet_alloc_failures.attr,
1793         &device_attr_host_fcp_packet_aborts.attr,
1794         &device_attr_host_fcp_frame_alloc_failures.attr,
1795         &device_attr_host_fc_no_free_exch.attr,
1796         &device_attr_host_fc_no_free_exch_xid.attr,
1797         &device_attr_host_fc_xid_not_found.attr,
1798         &device_attr_host_fc_xid_busy.attr,
1799         &device_attr_host_fc_seq_not_found.attr,
1800         &device_attr_host_fc_non_bls_resp.attr,
1801         &device_attr_host_reset_statistics.attr,
1802         NULL
1803 };
1804
1805 static struct attribute_group fc_statistics_group = {
1806         .name = "statistics",
1807         .attrs = fc_statistics_attrs,
1808 };
1809
1810
1811 /* Host Vport Attributes */
1812
1813 static int
1814 fc_parse_wwn(const char *ns, u64 *nm)
1815 {
1816         unsigned int i, j;
1817         u8 wwn[8];
1818
1819         memset(wwn, 0, sizeof(wwn));
1820
1821         /* Validate and store the new name */
1822         for (i=0, j=0; i < 16; i++) {
1823                 int value;
1824
1825                 value = hex_to_bin(*ns++);
1826                 if (value >= 0)
1827                         j = (j << 4) | value;
1828                 else
1829                         return -EINVAL;
1830                 if (i % 2) {
1831                         wwn[i/2] = j & 0xff;
1832                         j = 0;
1833                 }
1834         }
1835
1836         *nm = wwn_to_u64(wwn);
1837
1838         return 0;
1839 }
1840
1841
1842 /*
1843  * "Short-cut" sysfs variable to create a new vport on a FC Host.
1844  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1845  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1846  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1847  */
1848 static ssize_t
1849 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1850                            const char *buf, size_t count)
1851 {
1852         struct Scsi_Host *shost = transport_class_to_shost(dev);
1853         struct fc_vport_identifiers vid;
1854         struct fc_vport *vport;
1855         unsigned int cnt=count;
1856         int stat;
1857
1858         memset(&vid, 0, sizeof(vid));
1859
1860         /* count may include a LF at end of string */
1861         if (buf[cnt-1] == '\n')
1862                 cnt--;
1863
1864         /* validate we have enough characters for WWPN */
1865         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1866                 return -EINVAL;
1867
1868         stat = fc_parse_wwn(&buf[0], &vid.port_name);
1869         if (stat)
1870                 return stat;
1871
1872         stat = fc_parse_wwn(&buf[17], &vid.node_name);
1873         if (stat)
1874                 return stat;
1875
1876         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1877         vid.vport_type = FC_PORTTYPE_NPIV;
1878         /* vid.symbolic_name is already zero/NULL's */
1879         vid.disable = false;            /* always enabled */
1880
1881         /* we only allow support on Channel 0 !!! */
1882         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1883         return stat ? stat : count;
1884 }
1885 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1886                         store_fc_host_vport_create);
1887
1888
1889 /*
1890  * "Short-cut" sysfs variable to delete a vport on a FC Host.
1891  * Vport is identified by a string containing "<WWPN>:<WWNN>".
1892  * The WWNs are specified as hex characters, and may *not* contain
1893  * any prefixes (e.g. 0x, x, etc)
1894  */
1895 static ssize_t
1896 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1897                            const char *buf, size_t count)
1898 {
1899         struct Scsi_Host *shost = transport_class_to_shost(dev);
1900         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1901         struct fc_vport *vport;
1902         u64 wwpn, wwnn;
1903         unsigned long flags;
1904         unsigned int cnt=count;
1905         int stat, match;
1906
1907         /* count may include a LF at end of string */
1908         if (buf[cnt-1] == '\n')
1909                 cnt--;
1910
1911         /* validate we have enough characters for WWPN */
1912         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1913                 return -EINVAL;
1914
1915         stat = fc_parse_wwn(&buf[0], &wwpn);
1916         if (stat)
1917                 return stat;
1918
1919         stat = fc_parse_wwn(&buf[17], &wwnn);
1920         if (stat)
1921                 return stat;
1922
1923         spin_lock_irqsave(shost->host_lock, flags);
1924         match = 0;
1925         /* we only allow support on Channel 0 !!! */
1926         list_for_each_entry(vport, &fc_host->vports, peers) {
1927                 if ((vport->channel == 0) &&
1928                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1929                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1930                                 break;
1931                         vport->flags |= FC_VPORT_DELETING;
1932                         match = 1;
1933                         break;
1934                 }
1935         }
1936         spin_unlock_irqrestore(shost->host_lock, flags);
1937
1938         if (!match)
1939                 return -ENODEV;
1940
1941         stat = fc_vport_terminate(vport);
1942         return stat ? stat : count;
1943 }
1944 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1945                         store_fc_host_vport_delete);
1946
1947
1948 static int fc_host_match(struct attribute_container *cont,
1949                           struct device *dev)
1950 {
1951         struct Scsi_Host *shost;
1952         struct fc_internal *i;
1953
1954         if (!scsi_is_host_device(dev))
1955                 return 0;
1956
1957         shost = dev_to_shost(dev);
1958         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1959             != &fc_host_class.class)
1960                 return 0;
1961
1962         i = to_fc_internal(shost->transportt);
1963
1964         return &i->t.host_attrs.ac == cont;
1965 }
1966
1967 static int fc_target_match(struct attribute_container *cont,
1968                             struct device *dev)
1969 {
1970         struct Scsi_Host *shost;
1971         struct fc_internal *i;
1972
1973         if (!scsi_is_target_device(dev))
1974                 return 0;
1975
1976         shost = dev_to_shost(dev->parent);
1977         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1978             != &fc_host_class.class)
1979                 return 0;
1980
1981         i = to_fc_internal(shost->transportt);
1982
1983         return &i->t.target_attrs.ac == cont;
1984 }
1985
1986 static void fc_rport_dev_release(struct device *dev)
1987 {
1988         struct fc_rport *rport = dev_to_rport(dev);
1989         put_device(dev->parent);
1990         kfree(rport);
1991 }
1992
1993 int scsi_is_fc_rport(const struct device *dev)
1994 {
1995         return dev->release == fc_rport_dev_release;
1996 }
1997 EXPORT_SYMBOL(scsi_is_fc_rport);
1998
1999 static int fc_rport_match(struct attribute_container *cont,
2000                             struct device *dev)
2001 {
2002         struct Scsi_Host *shost;
2003         struct fc_internal *i;
2004
2005         if (!scsi_is_fc_rport(dev))
2006                 return 0;
2007
2008         shost = dev_to_shost(dev->parent);
2009         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2010             != &fc_host_class.class)
2011                 return 0;
2012
2013         i = to_fc_internal(shost->transportt);
2014
2015         return &i->rport_attr_cont.ac == cont;
2016 }
2017
2018
2019 static void fc_vport_dev_release(struct device *dev)
2020 {
2021         struct fc_vport *vport = dev_to_vport(dev);
2022         put_device(dev->parent);                /* release kobj parent */
2023         kfree(vport);
2024 }
2025
2026 int scsi_is_fc_vport(const struct device *dev)
2027 {
2028         return dev->release == fc_vport_dev_release;
2029 }
2030 EXPORT_SYMBOL(scsi_is_fc_vport);
2031
2032 static int fc_vport_match(struct attribute_container *cont,
2033                             struct device *dev)
2034 {
2035         struct fc_vport *vport;
2036         struct Scsi_Host *shost;
2037         struct fc_internal *i;
2038
2039         if (!scsi_is_fc_vport(dev))
2040                 return 0;
2041         vport = dev_to_vport(dev);
2042
2043         shost = vport_to_shost(vport);
2044         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2045             != &fc_host_class.class)
2046                 return 0;
2047
2048         i = to_fc_internal(shost->transportt);
2049         return &i->vport_attr_cont.ac == cont;
2050 }
2051
2052
2053 /**
2054  * fc_timed_out - FC Transport I/O timeout intercept handler
2055  * @scmd:       The SCSI command which timed out
2056  *
2057  * This routine protects against error handlers getting invoked while a
2058  * rport is in a blocked state, typically due to a temporarily loss of
2059  * connectivity. If the error handlers are allowed to proceed, requests
2060  * to abort i/o, reset the target, etc will likely fail as there is no way
2061  * to communicate with the device to perform the requested function. These
2062  * failures may result in the midlayer taking the device offline, requiring
2063  * manual intervention to restore operation.
2064  *
2065  * This routine, called whenever an i/o times out, validates the state of
2066  * the underlying rport. If the rport is blocked, it returns
2067  * EH_RESET_TIMER, which will continue to reschedule the timeout.
2068  * Eventually, either the device will return, or devloss_tmo will fire,
2069  * and when the timeout then fires, it will be handled normally.
2070  * If the rport is not blocked, normal error handling continues.
2071  *
2072  * Notes:
2073  *      This routine assumes no locks are held on entry.
2074  */
2075 static enum blk_eh_timer_return
2076 fc_timed_out(struct scsi_cmnd *scmd)
2077 {
2078         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2079
2080         if (rport->port_state == FC_PORTSTATE_BLOCKED)
2081                 return BLK_EH_RESET_TIMER;
2082
2083         return BLK_EH_NOT_HANDLED;
2084 }
2085
2086 /*
2087  * Called by fc_user_scan to locate an rport on the shost that
2088  * matches the channel and target id, and invoke scsi_scan_target()
2089  * on the rport.
2090  */
2091 static void
2092 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2093 {
2094         struct fc_rport *rport;
2095         unsigned long flags;
2096
2097         spin_lock_irqsave(shost->host_lock, flags);
2098
2099         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2100                 if (rport->scsi_target_id == -1)
2101                         continue;
2102
2103                 if (rport->port_state != FC_PORTSTATE_ONLINE)
2104                         continue;
2105
2106                 if ((channel == rport->channel) &&
2107                     (id == rport->scsi_target_id)) {
2108                         spin_unlock_irqrestore(shost->host_lock, flags);
2109                         scsi_scan_target(&rport->dev, channel, id, lun, 1);
2110                         return;
2111                 }
2112         }
2113
2114         spin_unlock_irqrestore(shost->host_lock, flags);
2115 }
2116
2117 /*
2118  * Called via sysfs scan routines. Necessary, as the FC transport
2119  * wants to place all target objects below the rport object. So this
2120  * routine must invoke the scsi_scan_target() routine with the rport
2121  * object as the parent.
2122  */
2123 static int
2124 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2125 {
2126         uint chlo, chhi;
2127         uint tgtlo, tgthi;
2128
2129         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2130             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2131             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2132                 return -EINVAL;
2133
2134         if (channel == SCAN_WILD_CARD) {
2135                 chlo = 0;
2136                 chhi = shost->max_channel + 1;
2137         } else {
2138                 chlo = channel;
2139                 chhi = channel + 1;
2140         }
2141
2142         if (id == SCAN_WILD_CARD) {
2143                 tgtlo = 0;
2144                 tgthi = shost->max_id;
2145         } else {
2146                 tgtlo = id;
2147                 tgthi = id + 1;
2148         }
2149
2150         for ( ; chlo < chhi; chlo++)
2151                 for ( ; tgtlo < tgthi; tgtlo++)
2152                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2153
2154         return 0;
2155 }
2156
2157 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2158                                 int result)
2159 {
2160         struct fc_internal *i = to_fc_internal(shost->transportt);
2161         return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2162 }
2163
2164 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2165 {
2166         struct fc_internal *i = to_fc_internal(shost->transportt);
2167         return i->f->it_nexus_response(shost, nexus, result);
2168 }
2169
2170 struct scsi_transport_template *
2171 fc_attach_transport(struct fc_function_template *ft)
2172 {
2173         int count;
2174         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2175                                         GFP_KERNEL);
2176
2177         if (unlikely(!i))
2178                 return NULL;
2179
2180         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2181         i->t.target_attrs.ac.class = &fc_transport_class.class;
2182         i->t.target_attrs.ac.match = fc_target_match;
2183         i->t.target_size = sizeof(struct fc_starget_attrs);
2184         transport_container_register(&i->t.target_attrs);
2185
2186         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2187         i->t.host_attrs.ac.class = &fc_host_class.class;
2188         i->t.host_attrs.ac.match = fc_host_match;
2189         i->t.host_size = sizeof(struct fc_host_attrs);
2190         if (ft->get_fc_host_stats)
2191                 i->t.host_attrs.statistics = &fc_statistics_group;
2192         transport_container_register(&i->t.host_attrs);
2193
2194         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2195         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2196         i->rport_attr_cont.ac.match = fc_rport_match;
2197         transport_container_register(&i->rport_attr_cont);
2198
2199         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2200         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2201         i->vport_attr_cont.ac.match = fc_vport_match;
2202         transport_container_register(&i->vport_attr_cont);
2203
2204         i->f = ft;
2205
2206         /* Transport uses the shost workq for scsi scanning */
2207         i->t.create_work_queue = 1;
2208
2209         i->t.eh_timed_out = fc_timed_out;
2210
2211         i->t.user_scan = fc_user_scan;
2212
2213         /* target-mode drivers' functions */
2214         i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2215         i->t.it_nexus_response = fc_it_nexus_response;
2216
2217         /*
2218          * Setup SCSI Target Attributes.
2219          */
2220         count = 0;
2221         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2222         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2223         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2224
2225         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2226
2227         i->starget_attrs[count] = NULL;
2228
2229
2230         /*
2231          * Setup SCSI Host Attributes.
2232          */
2233         count=0;
2234         SETUP_HOST_ATTRIBUTE_RD(node_name);
2235         SETUP_HOST_ATTRIBUTE_RD(port_name);
2236         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2237         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2238         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2239         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2240         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2241         if (ft->vport_create) {
2242                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2243                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2244         }
2245         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2246         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2247         SETUP_HOST_ATTRIBUTE_RD(model);
2248         SETUP_HOST_ATTRIBUTE_RD(model_description);
2249         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2250         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2251         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2252         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2253
2254         SETUP_HOST_ATTRIBUTE_RD(port_id);
2255         SETUP_HOST_ATTRIBUTE_RD(port_type);
2256         SETUP_HOST_ATTRIBUTE_RD(port_state);
2257         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2258         SETUP_HOST_ATTRIBUTE_RD(speed);
2259         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2260         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2261         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2262
2263         /* Transport-managed attributes */
2264         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2265         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2266         if (ft->issue_fc_host_lip)
2267                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2268         if (ft->vport_create)
2269                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2270         if (ft->vport_delete)
2271                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2272
2273         BUG_ON(count > FC_HOST_NUM_ATTRS);
2274
2275         i->host_attrs[count] = NULL;
2276
2277         /*
2278          * Setup Remote Port Attributes.
2279          */
2280         count=0;
2281         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2282         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2283         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2284         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2285         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2286         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2287         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2288         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2289         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2290         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2291
2292         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2293
2294         i->rport_attrs[count] = NULL;
2295
2296         /*
2297          * Setup Virtual Port Attributes.
2298          */
2299         count=0;
2300         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2301         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2302         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2303         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2304         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2305         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2306         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2307         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2308         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2309
2310         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2311
2312         i->vport_attrs[count] = NULL;
2313
2314         return &i->t;
2315 }
2316 EXPORT_SYMBOL(fc_attach_transport);
2317
2318 void fc_release_transport(struct scsi_transport_template *t)
2319 {
2320         struct fc_internal *i = to_fc_internal(t);
2321
2322         transport_container_unregister(&i->t.target_attrs);
2323         transport_container_unregister(&i->t.host_attrs);
2324         transport_container_unregister(&i->rport_attr_cont);
2325         transport_container_unregister(&i->vport_attr_cont);
2326
2327         kfree(i);
2328 }
2329 EXPORT_SYMBOL(fc_release_transport);
2330
2331 /**
2332  * fc_queue_work - Queue work to the fc_host workqueue.
2333  * @shost:      Pointer to Scsi_Host bound to fc_host.
2334  * @work:       Work to queue for execution.
2335  *
2336  * Return value:
2337  *      1 - work queued for execution
2338  *      0 - work is already queued
2339  *      -EINVAL - work queue doesn't exist
2340  */
2341 static int
2342 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2343 {
2344         if (unlikely(!fc_host_work_q(shost))) {
2345                 printk(KERN_ERR
2346                         "ERROR: FC host '%s' attempted to queue work, "
2347                         "when no workqueue created.\n", shost->hostt->name);
2348                 dump_stack();
2349
2350                 return -EINVAL;
2351         }
2352
2353         return queue_work(fc_host_work_q(shost), work);
2354 }
2355
2356 /**
2357  * fc_flush_work - Flush a fc_host's workqueue.
2358  * @shost:      Pointer to Scsi_Host bound to fc_host.
2359  */
2360 static void
2361 fc_flush_work(struct Scsi_Host *shost)
2362 {
2363         if (!fc_host_work_q(shost)) {
2364                 printk(KERN_ERR
2365                         "ERROR: FC host '%s' attempted to flush work, "
2366                         "when no workqueue created.\n", shost->hostt->name);
2367                 dump_stack();
2368                 return;
2369         }
2370
2371         flush_workqueue(fc_host_work_q(shost));
2372 }
2373
2374 /**
2375  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2376  * @shost:      Pointer to Scsi_Host bound to fc_host.
2377  * @work:       Work to queue for execution.
2378  * @delay:      jiffies to delay the work queuing
2379  *
2380  * Return value:
2381  *      1 on success / 0 already queued / < 0 for error
2382  */
2383 static int
2384 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2385                                 unsigned long delay)
2386 {
2387         if (unlikely(!fc_host_devloss_work_q(shost))) {
2388                 printk(KERN_ERR
2389                         "ERROR: FC host '%s' attempted to queue work, "
2390                         "when no workqueue created.\n", shost->hostt->name);
2391                 dump_stack();
2392
2393                 return -EINVAL;
2394         }
2395
2396         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2397 }
2398
2399 /**
2400  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2401  * @shost:      Pointer to Scsi_Host bound to fc_host.
2402  */
2403 static void
2404 fc_flush_devloss(struct Scsi_Host *shost)
2405 {
2406         if (!fc_host_devloss_work_q(shost)) {
2407                 printk(KERN_ERR
2408                         "ERROR: FC host '%s' attempted to flush work, "
2409                         "when no workqueue created.\n", shost->hostt->name);
2410                 dump_stack();
2411                 return;
2412         }
2413
2414         flush_workqueue(fc_host_devloss_work_q(shost));
2415 }
2416
2417
2418 /**
2419  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2420  * @shost:      Which &Scsi_Host
2421  *
2422  * This routine is expected to be called immediately preceding the
2423  * a driver's call to scsi_remove_host().
2424  *
2425  * WARNING: A driver utilizing the fc_transport, which fails to call
2426  *   this routine prior to scsi_remove_host(), will leave dangling
2427  *   objects in /sys/class/fc_remote_ports. Access to any of these
2428  *   objects can result in a system crash !!!
2429  *
2430  * Notes:
2431  *      This routine assumes no locks are held on entry.
2432  */
2433 void
2434 fc_remove_host(struct Scsi_Host *shost)
2435 {
2436         struct fc_vport *vport = NULL, *next_vport = NULL;
2437         struct fc_rport *rport = NULL, *next_rport = NULL;
2438         struct workqueue_struct *work_q;
2439         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2440         unsigned long flags;
2441
2442         spin_lock_irqsave(shost->host_lock, flags);
2443
2444         /* Remove any vports */
2445         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2446                 fc_queue_work(shost, &vport->vport_delete_work);
2447
2448         /* Remove any remote ports */
2449         list_for_each_entry_safe(rport, next_rport,
2450                         &fc_host->rports, peers) {
2451                 list_del(&rport->peers);
2452                 rport->port_state = FC_PORTSTATE_DELETED;
2453                 fc_queue_work(shost, &rport->rport_delete_work);
2454         }
2455
2456         list_for_each_entry_safe(rport, next_rport,
2457                         &fc_host->rport_bindings, peers) {
2458                 list_del(&rport->peers);
2459                 rport->port_state = FC_PORTSTATE_DELETED;
2460                 fc_queue_work(shost, &rport->rport_delete_work);
2461         }
2462
2463         spin_unlock_irqrestore(shost->host_lock, flags);
2464
2465         /* flush all scan work items */
2466         scsi_flush_work(shost);
2467
2468         /* flush all stgt delete, and rport delete work items, then kill it  */
2469         if (fc_host->work_q) {
2470                 work_q = fc_host->work_q;
2471                 fc_host->work_q = NULL;
2472                 destroy_workqueue(work_q);
2473         }
2474
2475         /* flush all devloss work items, then kill it  */
2476         if (fc_host->devloss_work_q) {
2477                 work_q = fc_host->devloss_work_q;
2478                 fc_host->devloss_work_q = NULL;
2479                 destroy_workqueue(work_q);
2480         }
2481 }
2482 EXPORT_SYMBOL(fc_remove_host);
2483
2484 static void fc_terminate_rport_io(struct fc_rport *rport)
2485 {
2486         struct Scsi_Host *shost = rport_to_shost(rport);
2487         struct fc_internal *i = to_fc_internal(shost->transportt);
2488
2489         /* Involve the LLDD if possible to terminate all io on the rport. */
2490         if (i->f->terminate_rport_io)
2491                 i->f->terminate_rport_io(rport);
2492
2493         /*
2494          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2495          */
2496         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2497 }
2498
2499 /**
2500  * fc_starget_delete - called to delete the scsi descendants of an rport
2501  * @work:       remote port to be operated on.
2502  *
2503  * Deletes target and all sdevs.
2504  */
2505 static void
2506 fc_starget_delete(struct work_struct *work)
2507 {
2508         struct fc_rport *rport =
2509                 container_of(work, struct fc_rport, stgt_delete_work);
2510
2511         fc_terminate_rport_io(rport);
2512         scsi_remove_target(&rport->dev);
2513 }
2514
2515
2516 /**
2517  * fc_rport_final_delete - finish rport termination and delete it.
2518  * @work:       remote port to be deleted.
2519  */
2520 static void
2521 fc_rport_final_delete(struct work_struct *work)
2522 {
2523         struct fc_rport *rport =
2524                 container_of(work, struct fc_rport, rport_delete_work);
2525         struct device *dev = &rport->dev;
2526         struct Scsi_Host *shost = rport_to_shost(rport);
2527         struct fc_internal *i = to_fc_internal(shost->transportt);
2528         unsigned long flags;
2529         int do_callback = 0;
2530
2531         fc_terminate_rport_io(rport);
2532
2533         /*
2534          * if a scan is pending, flush the SCSI Host work_q so that
2535          * that we can reclaim the rport scan work element.
2536          */
2537         if (rport->flags & FC_RPORT_SCAN_PENDING)
2538                 scsi_flush_work(shost);
2539
2540         /*
2541          * Cancel any outstanding timers. These should really exist
2542          * only when rmmod'ing the LLDD and we're asking for
2543          * immediate termination of the rports
2544          */
2545         spin_lock_irqsave(shost->host_lock, flags);
2546         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2547                 spin_unlock_irqrestore(shost->host_lock, flags);
2548                 if (!cancel_delayed_work(&rport->fail_io_work))
2549                         fc_flush_devloss(shost);
2550                 if (!cancel_delayed_work(&rport->dev_loss_work))
2551                         fc_flush_devloss(shost);
2552                 cancel_work_sync(&rport->scan_work);
2553                 spin_lock_irqsave(shost->host_lock, flags);
2554                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2555         }
2556         spin_unlock_irqrestore(shost->host_lock, flags);
2557
2558         /* Delete SCSI target and sdevs */
2559         if (rport->scsi_target_id != -1)
2560                 fc_starget_delete(&rport->stgt_delete_work);
2561
2562         /*
2563          * Notify the driver that the rport is now dead. The LLDD will
2564          * also guarantee that any communication to the rport is terminated
2565          *
2566          * Avoid this call if we already called it when we preserved the
2567          * rport for the binding.
2568          */
2569         spin_lock_irqsave(shost->host_lock, flags);
2570         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2571             (i->f->dev_loss_tmo_callbk)) {
2572                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2573                 do_callback = 1;
2574         }
2575         spin_unlock_irqrestore(shost->host_lock, flags);
2576
2577         if (do_callback)
2578                 i->f->dev_loss_tmo_callbk(rport);
2579
2580         fc_bsg_remove(rport->rqst_q);
2581
2582         transport_remove_device(dev);
2583         device_del(dev);
2584         transport_destroy_device(dev);
2585         put_device(&shost->shost_gendev);       /* for fc_host->rport list */
2586         put_device(dev);                        /* for self-reference */
2587 }
2588
2589
2590 /**
2591  * fc_rport_create - allocates and creates a remote FC port.
2592  * @shost:      scsi host the remote port is connected to.
2593  * @channel:    Channel on shost port connected to.
2594  * @ids:        The world wide names, fc address, and FC4 port
2595  *              roles for the remote port.
2596  *
2597  * Allocates and creates the remoter port structure, including the
2598  * class and sysfs creation.
2599  *
2600  * Notes:
2601  *      This routine assumes no locks are held on entry.
2602  */
2603 static struct fc_rport *
2604 fc_rport_create(struct Scsi_Host *shost, int channel,
2605         struct fc_rport_identifiers  *ids)
2606 {
2607         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2608         struct fc_internal *fci = to_fc_internal(shost->transportt);
2609         struct fc_rport *rport;
2610         struct device *dev;
2611         unsigned long flags;
2612         int error;
2613         size_t size;
2614
2615         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2616         rport = kzalloc(size, GFP_KERNEL);
2617         if (unlikely(!rport)) {
2618                 printk(KERN_ERR "%s: allocation failure\n", __func__);
2619                 return NULL;
2620         }
2621
2622         rport->maxframe_size = -1;
2623         rport->supported_classes = FC_COS_UNSPECIFIED;
2624         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2625         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2626         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2627         rport->port_id = ids->port_id;
2628         rport->roles = ids->roles;
2629         rport->port_state = FC_PORTSTATE_ONLINE;
2630         if (fci->f->dd_fcrport_size)
2631                 rport->dd_data = &rport[1];
2632         rport->channel = channel;
2633         rport->fast_io_fail_tmo = -1;
2634
2635         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2636         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2637         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2638         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2639         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2640
2641         spin_lock_irqsave(shost->host_lock, flags);
2642
2643         rport->number = fc_host->next_rport_number++;
2644         if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2645                 rport->scsi_target_id = fc_host->next_target_id++;
2646         else
2647                 rport->scsi_target_id = -1;
2648         list_add_tail(&rport->peers, &fc_host->rports);
2649         get_device(&shost->shost_gendev);       /* for fc_host->rport list */
2650
2651         spin_unlock_irqrestore(shost->host_lock, flags);
2652
2653         dev = &rport->dev;
2654         device_initialize(dev);                 /* takes self reference */
2655         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2656         dev->release = fc_rport_dev_release;
2657         dev_set_name(dev, "rport-%d:%d-%d",
2658                      shost->host_no, channel, rport->number);
2659         transport_setup_device(dev);
2660
2661         error = device_add(dev);
2662         if (error) {
2663                 printk(KERN_ERR "FC Remote Port device_add failed\n");
2664                 goto delete_rport;
2665         }
2666         transport_add_device(dev);
2667         transport_configure_device(dev);
2668
2669         fc_bsg_rportadd(shost, rport);
2670         /* ignore any bsg add error - we just can't do sgio */
2671
2672         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2673                 /* initiate a scan of the target */
2674                 rport->flags |= FC_RPORT_SCAN_PENDING;
2675                 scsi_queue_work(shost, &rport->scan_work);
2676         }
2677
2678         return rport;
2679
2680 delete_rport:
2681         transport_destroy_device(dev);
2682         spin_lock_irqsave(shost->host_lock, flags);
2683         list_del(&rport->peers);
2684         put_device(&shost->shost_gendev);       /* for fc_host->rport list */
2685         spin_unlock_irqrestore(shost->host_lock, flags);
2686         put_device(dev->parent);
2687         kfree(rport);
2688         return NULL;
2689 }
2690
2691 /**
2692  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2693  * @shost:      scsi host the remote port is connected to.
2694  * @channel:    Channel on shost port connected to.
2695  * @ids:        The world wide names, fc address, and FC4 port
2696  *              roles for the remote port.
2697  *
2698  * The LLDD calls this routine to notify the transport of the existence
2699  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2700  * of the port, it's FC address (port_id), and the FC4 roles that are
2701  * active for the port.
2702  *
2703  * For ports that are FCP targets (aka scsi targets), the FC transport
2704  * maintains consistent target id bindings on behalf of the LLDD.
2705  * A consistent target id binding is an assignment of a target id to
2706  * a remote port identifier, which persists while the scsi host is
2707  * attached. The remote port can disappear, then later reappear, and
2708  * it's target id assignment remains the same. This allows for shifts
2709  * in FC addressing (if binding by wwpn or wwnn) with no apparent
2710  * changes to the scsi subsystem which is based on scsi host number and
2711  * target id values.  Bindings are only valid during the attachment of
2712  * the scsi host. If the host detaches, then later re-attaches, target
2713  * id bindings may change.
2714  *
2715  * This routine is responsible for returning a remote port structure.
2716  * The routine will search the list of remote ports it maintains
2717  * internally on behalf of consistent target id mappings. If found, the
2718  * remote port structure will be reused. Otherwise, a new remote port
2719  * structure will be allocated.
2720  *
2721  * Whenever a remote port is allocated, a new fc_remote_port class
2722  * device is created.
2723  *
2724  * Should not be called from interrupt context.
2725  *
2726  * Notes:
2727  *      This routine assumes no locks are held on entry.
2728  */
2729 struct fc_rport *
2730 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2731         struct fc_rport_identifiers  *ids)
2732 {
2733         struct fc_internal *fci = to_fc_internal(shost->transportt);
2734         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2735         struct fc_rport *rport;
2736         unsigned long flags;
2737         int match = 0;
2738
2739         /* ensure any stgt delete functions are done */
2740         fc_flush_work(shost);
2741
2742         /*
2743          * Search the list of "active" rports, for an rport that has been
2744          * deleted, but we've held off the real delete while the target
2745          * is in a "blocked" state.
2746          */
2747         spin_lock_irqsave(shost->host_lock, flags);
2748
2749         list_for_each_entry(rport, &fc_host->rports, peers) {
2750
2751                 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2752                         (rport->channel == channel)) {
2753
2754                         switch (fc_host->tgtid_bind_type) {
2755                         case FC_TGTID_BIND_BY_WWPN:
2756                         case FC_TGTID_BIND_NONE:
2757                                 if (rport->port_name == ids->port_name)
2758                                         match = 1;
2759                                 break;
2760                         case FC_TGTID_BIND_BY_WWNN:
2761                                 if (rport->node_name == ids->node_name)
2762                                         match = 1;
2763                                 break;
2764                         case FC_TGTID_BIND_BY_ID:
2765                                 if (rport->port_id == ids->port_id)
2766                                         match = 1;
2767                                 break;
2768                         }
2769
2770                         if (match) {
2771
2772                                 memcpy(&rport->node_name, &ids->node_name,
2773                                         sizeof(rport->node_name));
2774                                 memcpy(&rport->port_name, &ids->port_name,
2775                                         sizeof(rport->port_name));
2776                                 rport->port_id = ids->port_id;
2777
2778                                 rport->port_state = FC_PORTSTATE_ONLINE;
2779                                 rport->roles = ids->roles;
2780
2781                                 spin_unlock_irqrestore(shost->host_lock, flags);
2782
2783                                 if (fci->f->dd_fcrport_size)
2784                                         memset(rport->dd_data, 0,
2785                                                 fci->f->dd_fcrport_size);
2786
2787                                 /*
2788                                  * If we were not a target, cancel the
2789                                  * io terminate and rport timers, and
2790                                  * we're done.
2791                                  *
2792                                  * If we were a target, but our new role
2793                                  * doesn't indicate a target, leave the
2794                                  * timers running expecting the role to
2795                                  * change as the target fully logs in. If
2796                                  * it doesn't, the target will be torn down.
2797                                  *
2798                                  * If we were a target, and our role shows
2799                                  * we're still a target, cancel the timers
2800                                  * and kick off a scan.
2801                                  */
2802
2803                                 /* was a target, not in roles */
2804                                 if ((rport->scsi_target_id != -1) &&
2805                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2806                                         return rport;
2807
2808                                 /*
2809                                  * Stop the fail io and dev_loss timers.
2810                                  * If they flush, the port_state will
2811                                  * be checked and will NOOP the function.
2812                                  */
2813                                 if (!cancel_delayed_work(&rport->fail_io_work))
2814                                         fc_flush_devloss(shost);
2815                                 if (!cancel_delayed_work(&rport->dev_loss_work))
2816                                         fc_flush_devloss(shost);
2817
2818                                 spin_lock_irqsave(shost->host_lock, flags);
2819
2820                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2821                                                   FC_RPORT_DEVLOSS_PENDING |
2822                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
2823
2824                                 spin_unlock_irqrestore(shost->host_lock, flags);
2825
2826                                 /* if target, initiate a scan */
2827                                 if (rport->scsi_target_id != -1) {
2828                                         scsi_target_unblock(&rport->dev,
2829                                                             SDEV_RUNNING);
2830                                         spin_lock_irqsave(shost->host_lock,
2831                                                           flags);
2832                                         rport->flags |= FC_RPORT_SCAN_PENDING;
2833                                         scsi_queue_work(shost,
2834                                                         &rport->scan_work);
2835                                         spin_unlock_irqrestore(shost->host_lock,
2836                                                         flags);
2837                                 }
2838
2839                                 fc_bsg_goose_queue(rport);
2840
2841                                 return rport;
2842                         }
2843                 }
2844         }
2845
2846         /*
2847          * Search the bindings array
2848          * Note: if never a FCP target, you won't be on this list
2849          */
2850         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2851
2852                 /* search for a matching consistent binding */
2853
2854                 list_for_each_entry(rport, &fc_host->rport_bindings,
2855                                         peers) {
2856                         if (rport->channel != channel)
2857                                 continue;
2858
2859                         switch (fc_host->tgtid_bind_type) {
2860                         case FC_TGTID_BIND_BY_WWPN:
2861                                 if (rport->port_name == ids->port_name)
2862                                         match = 1;
2863                                 break;
2864                         case FC_TGTID_BIND_BY_WWNN:
2865                                 if (rport->node_name == ids->node_name)
2866                                         match = 1;
2867                                 break;
2868                         case FC_TGTID_BIND_BY_ID:
2869                                 if (rport->port_id == ids->port_id)
2870                                         match = 1;
2871                                 break;
2872                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2873                                 break;
2874                         }
2875
2876                         if (match) {
2877                                 list_move_tail(&rport->peers, &fc_host->rports);
2878                                 break;
2879                         }
2880                 }
2881
2882                 if (match) {
2883                         memcpy(&rport->node_name, &ids->node_name,
2884                                 sizeof(rport->node_name));
2885                         memcpy(&rport->port_name, &ids->port_name,
2886                                 sizeof(rport->port_name));
2887                         rport->port_id = ids->port_id;
2888                         rport->roles = ids->roles;
2889                         rport->port_state = FC_PORTSTATE_ONLINE;
2890                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2891
2892                         if (fci->f->dd_fcrport_size)
2893                                 memset(rport->dd_data, 0,
2894                                                 fci->f->dd_fcrport_size);
2895                         spin_unlock_irqrestore(shost->host_lock, flags);
2896
2897                         if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
2898                                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
2899
2900                                 /* initiate a scan of the target */
2901                                 spin_lock_irqsave(shost->host_lock, flags);
2902                                 rport->flags |= FC_RPORT_SCAN_PENDING;
2903                                 scsi_queue_work(shost, &rport->scan_work);
2904                                 spin_unlock_irqrestore(shost->host_lock, flags);
2905                         }
2906                         return rport;
2907                 }
2908         }
2909
2910         spin_unlock_irqrestore(shost->host_lock, flags);
2911
2912         /* No consistent binding found - create new remote port entry */
2913         rport = fc_rport_create(shost, channel, ids);
2914
2915         return rport;
2916 }
2917 EXPORT_SYMBOL(fc_remote_port_add);
2918
2919
2920 /**
2921  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2922  * @rport:      The remote port that no longer exists
2923  *
2924  * The LLDD calls this routine to notify the transport that a remote
2925  * port is no longer part of the topology. Note: Although a port
2926  * may no longer be part of the topology, it may persist in the remote
2927  * ports displayed by the fc_host. We do this under 2 conditions:
2928  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2929  *   This allows the port to temporarily disappear, then reappear without
2930  *   disrupting the SCSI device tree attached to it. During the "blocked"
2931  *   period the port will still exist.
2932  * 2) If the port was a scsi target and disappears for longer than we
2933  *   expect, we'll delete the port and the tear down the SCSI device tree
2934  *   attached to it. However, we want to semi-persist the target id assigned
2935  *   to that port if it eventually does exist. The port structure will
2936  *   remain (although with minimal information) so that the target id
2937  *   bindings remails.
2938  *
2939  * If the remote port is not an FCP Target, it will be fully torn down
2940  * and deallocated, including the fc_remote_port class device.
2941  *
2942  * If the remote port is an FCP Target, the port will be placed in a
2943  * temporary blocked state. From the LLDD's perspective, the rport no
2944  * longer exists. From the SCSI midlayer's perspective, the SCSI target
2945  * exists, but all sdevs on it are blocked from further I/O. The following
2946  * is then expected.
2947  *
2948  *   If the remote port does not return (signaled by a LLDD call to
2949  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2950  *   scsi target is removed - killing all outstanding i/o and removing the
2951  *   scsi devices attached ot it. The port structure will be marked Not
2952  *   Present and be partially cleared, leaving only enough information to
2953  *   recognize the remote port relative to the scsi target id binding if
2954  *   it later appears.  The port will remain as long as there is a valid
2955  *   binding (e.g. until the user changes the binding type or unloads the
2956  *   scsi host with the binding).
2957  *
2958  *   If the remote port returns within the dev_loss_tmo value (and matches
2959  *   according to the target id binding type), the port structure will be
2960  *   reused. If it is no longer a SCSI target, the target will be torn
2961  *   down. If it continues to be a SCSI target, then the target will be
2962  *   unblocked (allowing i/o to be resumed), and a scan will be activated
2963  *   to ensure that all luns are detected.
2964  *
2965  * Called from normal process context only - cannot be called from interrupt.
2966  *
2967  * Notes:
2968  *      This routine assumes no locks are held on entry.
2969  */
2970 void
2971 fc_remote_port_delete(struct fc_rport  *rport)
2972 {
2973         struct Scsi_Host *shost = rport_to_shost(rport);
2974         unsigned long timeout = rport->dev_loss_tmo;
2975         unsigned long flags;
2976
2977         /*
2978          * No need to flush the fc_host work_q's, as all adds are synchronous.
2979          *
2980          * We do need to reclaim the rport scan work element, so eventually
2981          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2982          * there's still a scan pending.
2983          */
2984
2985         spin_lock_irqsave(shost->host_lock, flags);
2986
2987         if (rport->port_state != FC_PORTSTATE_ONLINE) {
2988                 spin_unlock_irqrestore(shost->host_lock, flags);
2989                 return;
2990         }
2991
2992         /*
2993          * In the past, we if this was not an FCP-Target, we would
2994          * unconditionally just jump to deleting the rport.
2995          * However, rports can be used as node containers by the LLDD,
2996          * and its not appropriate to just terminate the rport at the
2997          * first sign of a loss in connectivity. The LLDD may want to
2998          * send ELS traffic to re-validate the login. If the rport is
2999          * immediately deleted, it makes it inappropriate for a node
3000          * container.
3001          * So... we now unconditionally wait dev_loss_tmo before
3002          * destroying an rport.
3003          */
3004
3005         rport->port_state = FC_PORTSTATE_BLOCKED;
3006
3007         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3008
3009         spin_unlock_irqrestore(shost->host_lock, flags);
3010
3011         if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
3012             shost->active_mode & MODE_TARGET)
3013                 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
3014
3015         scsi_target_block(&rport->dev);
3016
3017         /* see if we need to kill io faster than waiting for device loss */
3018         if ((rport->fast_io_fail_tmo != -1) &&
3019             (rport->fast_io_fail_tmo < timeout))
3020                 fc_queue_devloss_work(shost, &rport->fail_io_work,
3021                                         rport->fast_io_fail_tmo * HZ);
3022
3023         /* cap the length the devices can be blocked until they are deleted */
3024         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3025 }
3026 EXPORT_SYMBOL(fc_remote_port_delete);
3027
3028 /**
3029  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3030  * @rport:      The remote port that changed.
3031  * @roles:      New roles for this port.
3032  *
3033  * Description: The LLDD calls this routine to notify the transport that the
3034  * roles on a remote port may have changed. The largest effect of this is
3035  * if a port now becomes a FCP Target, it must be allocated a
3036  * scsi target id.  If the port is no longer a FCP target, any
3037  * scsi target id value assigned to it will persist in case the
3038  * role changes back to include FCP Target. No changes in the scsi
3039  * midlayer will be invoked if the role changes (in the expectation
3040  * that the role will be resumed. If it doesn't normal error processing
3041  * will take place).
3042  *
3043  * Should not be called from interrupt context.
3044  *
3045  * Notes:
3046  *      This routine assumes no locks are held on entry.
3047  */
3048 void
3049 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3050 {
3051         struct Scsi_Host *shost = rport_to_shost(rport);
3052         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3053         unsigned long flags;
3054         int create = 0;
3055         int ret;
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         } else if (shost->active_mode & MODE_TARGET) {
3065                 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
3066                                              (char *)&rport->node_name);
3067                 if (ret)
3068                         printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
3069                                ret);
3070         }
3071
3072         rport->roles = roles;
3073
3074         spin_unlock_irqrestore(shost->host_lock, flags);
3075
3076         if (create) {
3077                 /*
3078                  * There may have been a delete timer running on the
3079                  * port. Ensure that it is cancelled as we now know
3080                  * the port is an FCP Target.
3081                  * Note: we know the rport is exists and in an online
3082                  *  state as the LLDD would not have had an rport
3083                  *  reference to pass us.
3084                  *
3085                  * Take no action on the del_timer failure as the state
3086                  * machine state change will validate the
3087                  * transaction.
3088                  */
3089                 if (!cancel_delayed_work(&rport->fail_io_work))
3090                         fc_flush_devloss(shost);
3091                 if (!cancel_delayed_work(&rport->dev_loss_work))
3092                         fc_flush_devloss(shost);
3093
3094                 spin_lock_irqsave(shost->host_lock, flags);
3095                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3096                                   FC_RPORT_DEVLOSS_PENDING |
3097                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3098                 spin_unlock_irqrestore(shost->host_lock, flags);
3099
3100                 /* ensure any stgt delete functions are done */
3101                 fc_flush_work(shost);
3102
3103                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3104                 /* initiate a scan of the target */
3105                 spin_lock_irqsave(shost->host_lock, flags);
3106                 rport->flags |= FC_RPORT_SCAN_PENDING;
3107                 scsi_queue_work(shost, &rport->scan_work);
3108                 spin_unlock_irqrestore(shost->host_lock, flags);
3109         }
3110 }
3111 EXPORT_SYMBOL(fc_remote_port_rolechg);
3112
3113 /**
3114  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3115  * @work:       rport target that failed to reappear in the allotted time.
3116  *
3117  * Description: An attempt to delete a remote port blocks, and if it fails
3118  *              to return in the allotted time this gets called.
3119  */
3120 static void
3121 fc_timeout_deleted_rport(struct work_struct *work)
3122 {
3123         struct fc_rport *rport =
3124                 container_of(work, struct fc_rport, dev_loss_work.work);
3125         struct Scsi_Host *shost = rport_to_shost(rport);
3126         struct fc_internal *i = to_fc_internal(shost->transportt);
3127         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3128         unsigned long flags;
3129         int do_callback = 0;
3130
3131         spin_lock_irqsave(shost->host_lock, flags);
3132
3133         rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3134
3135         /*
3136          * If the port is ONLINE, then it came back. If it was a SCSI
3137          * target, validate it still is. If not, tear down the
3138          * scsi_target on it.
3139          */
3140         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3141             (rport->scsi_target_id != -1) &&
3142             !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3143                 dev_printk(KERN_ERR, &rport->dev,
3144                         "blocked FC remote port time out: no longer"
3145                         " a FCP target, removing starget\n");
3146                 spin_unlock_irqrestore(shost->host_lock, flags);
3147                 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3148                 fc_queue_work(shost, &rport->stgt_delete_work);
3149                 return;
3150         }
3151
3152         /* NOOP state - we're flushing workq's */
3153         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3154                 spin_unlock_irqrestore(shost->host_lock, flags);
3155                 dev_printk(KERN_ERR, &rport->dev,
3156                         "blocked FC remote port time out: leaving"
3157                         " rport%s alone\n",
3158                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3159                 return;
3160         }
3161
3162         if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3163             (rport->scsi_target_id == -1)) {
3164                 list_del(&rport->peers);
3165                 rport->port_state = FC_PORTSTATE_DELETED;
3166                 dev_printk(KERN_ERR, &rport->dev,
3167                         "blocked FC remote port time out: removing"
3168                         " rport%s\n",
3169                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3170                 fc_queue_work(shost, &rport->rport_delete_work);
3171                 spin_unlock_irqrestore(shost->host_lock, flags);
3172                 return;
3173         }
3174
3175         dev_printk(KERN_ERR, &rport->dev,
3176                 "blocked FC remote port time out: removing target and "
3177                 "saving binding\n");
3178
3179         list_move_tail(&rport->peers, &fc_host->rport_bindings);
3180
3181         /*
3182          * Note: We do not remove or clear the hostdata area. This allows
3183          *   host-specific target data to persist along with the
3184          *   scsi_target_id. It's up to the host to manage it's hostdata area.
3185          */
3186
3187         /*
3188          * Reinitialize port attributes that may change if the port comes back.
3189          */
3190         rport->maxframe_size = -1;
3191         rport->supported_classes = FC_COS_UNSPECIFIED;
3192         rport->roles = FC_PORT_ROLE_UNKNOWN;
3193         rport->port_state = FC_PORTSTATE_NOTPRESENT;
3194         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3195
3196         /*
3197          * Pre-emptively kill I/O rather than waiting for the work queue
3198          * item to teardown the starget. (FCOE libFC folks prefer this
3199          * and to have the rport_port_id still set when it's done).
3200          */
3201         spin_unlock_irqrestore(shost->host_lock, flags);
3202         fc_terminate_rport_io(rport);
3203
3204         spin_lock_irqsave(shost->host_lock, flags);
3205
3206         if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {     /* still missing */
3207
3208                 /* remove the identifiers that aren't used in the consisting binding */
3209                 switch (fc_host->tgtid_bind_type) {
3210                 case FC_TGTID_BIND_BY_WWPN:
3211                         rport->node_name = -1;
3212                         rport->port_id = -1;
3213                         break;
3214                 case FC_TGTID_BIND_BY_WWNN:
3215                         rport->port_name = -1;
3216                         rport->port_id = -1;
3217                         break;
3218                 case FC_TGTID_BIND_BY_ID:
3219                         rport->node_name = -1;
3220                         rport->port_name = -1;
3221                         break;
3222                 case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
3223                         break;
3224                 }
3225
3226                 /*
3227                  * As this only occurs if the remote port (scsi target)
3228                  * went away and didn't come back - we'll remove
3229                  * all attached scsi devices.
3230                  */
3231                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3232                 fc_queue_work(shost, &rport->stgt_delete_work);
3233
3234                 do_callback = 1;
3235         }
3236
3237         spin_unlock_irqrestore(shost->host_lock, flags);
3238
3239         /*
3240          * Notify the driver that the rport is now dead. The LLDD will
3241          * also guarantee that any communication to the rport is terminated
3242          *
3243          * Note: we set the CALLBK_DONE flag above to correspond
3244          */
3245         if (do_callback && i->f->dev_loss_tmo_callbk)
3246                 i->f->dev_loss_tmo_callbk(rport);
3247 }
3248
3249
3250 /**
3251  * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3252  * @work:       rport to terminate io on.
3253  *
3254  * Notes: Only requests the failure of the io, not that all are flushed
3255  *    prior to returning.
3256  */
3257 static void
3258 fc_timeout_fail_rport_io(struct work_struct *work)
3259 {
3260         struct fc_rport *rport =
3261                 container_of(work, struct fc_rport, fail_io_work.work);
3262
3263         if (rport->port_state != FC_PORTSTATE_BLOCKED)
3264                 return;
3265
3266         rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3267         fc_terminate_rport_io(rport);
3268 }
3269
3270 /**
3271  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3272  * @work:       remote port to be scanned.
3273  */
3274 static void
3275 fc_scsi_scan_rport(struct work_struct *work)
3276 {
3277         struct fc_rport *rport =
3278                 container_of(work, struct fc_rport, scan_work);
3279         struct Scsi_Host *shost = rport_to_shost(rport);
3280         struct fc_internal *i = to_fc_internal(shost->transportt);
3281         unsigned long flags;
3282
3283         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3284             (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3285             !(i->f->disable_target_scan)) {
3286                 scsi_scan_target(&rport->dev, rport->channel,
3287                         rport->scsi_target_id, SCAN_WILD_CARD, 1);
3288         }
3289
3290         spin_lock_irqsave(shost->host_lock, flags);
3291         rport->flags &= ~FC_RPORT_SCAN_PENDING;
3292         spin_unlock_irqrestore(shost->host_lock, flags);
3293 }
3294
3295 /**
3296  * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3297  * @cmnd: SCSI command that scsi_eh is trying to recover
3298  *
3299  * This routine can be called from a FC LLD scsi_eh callback. It
3300  * blocks the scsi_eh thread until the fc_rport leaves the
3301  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3302  * necessary to avoid the scsi_eh failing recovery actions for blocked
3303  * rports which would lead to offlined SCSI devices.
3304  *
3305  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3306  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3307  *          passed back to scsi_eh.
3308  */
3309 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3310 {
3311         struct Scsi_Host *shost = cmnd->device->host;
3312         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3313         unsigned long flags;
3314
3315         spin_lock_irqsave(shost->host_lock, flags);
3316         while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3317                !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3318                 spin_unlock_irqrestore(shost->host_lock, flags);
3319                 msleep(1000);
3320                 spin_lock_irqsave(shost->host_lock, flags);
3321         }
3322         spin_unlock_irqrestore(shost->host_lock, flags);
3323
3324         if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3325                 return FAST_IO_FAIL;
3326
3327         return 0;
3328 }
3329 EXPORT_SYMBOL(fc_block_scsi_eh);
3330
3331 /**
3332  * fc_vport_setup - allocates and creates a FC virtual port.
3333  * @shost:      scsi host the virtual port is connected to.
3334  * @channel:    Channel on shost port connected to.
3335  * @pdev:       parent device for vport
3336  * @ids:        The world wide names, FC4 port roles, etc for
3337  *              the virtual port.
3338  * @ret_vport:  The pointer to the created vport.
3339  *
3340  * Allocates and creates the vport structure, calls the parent host
3341  * to instantiate the vport, the completes w/ class and sysfs creation.
3342  *
3343  * Notes:
3344  *      This routine assumes no locks are held on entry.
3345  */
3346 static int
3347 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3348         struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
3349 {
3350         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3351         struct fc_internal *fci = to_fc_internal(shost->transportt);
3352         struct fc_vport *vport;
3353         struct device *dev;
3354         unsigned long flags;
3355         size_t size;
3356         int error;
3357
3358         *ret_vport = NULL;
3359
3360         if ( ! fci->f->vport_create)
3361                 return -ENOENT;
3362
3363         size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3364         vport = kzalloc(size, GFP_KERNEL);
3365         if (unlikely(!vport)) {
3366                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3367                 return -ENOMEM;
3368         }
3369
3370         vport->vport_state = FC_VPORT_UNKNOWN;
3371         vport->vport_last_state = FC_VPORT_UNKNOWN;
3372         vport->node_name = ids->node_name;
3373         vport->port_name = ids->port_name;
3374         vport->roles = ids->roles;
3375         vport->vport_type = ids->vport_type;
3376         if (fci->f->dd_fcvport_size)
3377                 vport->dd_data = &vport[1];
3378         vport->shost = shost;
3379         vport->channel = channel;
3380         vport->flags = FC_VPORT_CREATING;
3381         INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3382
3383         spin_lock_irqsave(shost->host_lock, flags);
3384
3385         if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3386                 spin_unlock_irqrestore(shost->host_lock, flags);
3387                 kfree(vport);
3388                 return -ENOSPC;
3389         }
3390         fc_host->npiv_vports_inuse++;
3391         vport->number = fc_host->next_vport_number++;
3392         list_add_tail(&vport->peers, &fc_host->vports);
3393         get_device(&shost->shost_gendev);       /* for fc_host->vport list */
3394
3395         spin_unlock_irqrestore(shost->host_lock, flags);
3396
3397         dev = &vport->dev;
3398         device_initialize(dev);                 /* takes self reference */
3399         dev->parent = get_device(pdev);         /* takes parent reference */
3400         dev->release = fc_vport_dev_release;
3401         dev_set_name(dev, "vport-%d:%d-%d",
3402                      shost->host_no, channel, vport->number);
3403         transport_setup_device(dev);
3404
3405         error = device_add(dev);
3406         if (error) {
3407                 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3408                 goto delete_vport;
3409         }
3410         transport_add_device(dev);
3411         transport_configure_device(dev);
3412
3413         error = fci->f->vport_create(vport, ids->disable);
3414         if (error) {
3415                 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3416                 goto delete_vport_all;
3417         }
3418
3419         /*
3420          * if the parent isn't the physical adapter's Scsi_Host, ensure
3421          * the Scsi_Host at least contains ia symlink to the vport.
3422          */
3423         if (pdev != &shost->shost_gendev) {
3424                 error = sysfs_create_link(&shost->shost_gendev.kobj,
3425                                  &dev->kobj, dev_name(dev));
3426                 if (error)
3427                         printk(KERN_ERR
3428                                 "%s: Cannot create vport symlinks for "
3429                                 "%s, err=%d\n",
3430                                 __func__, dev_name(dev), error);
3431         }
3432         spin_lock_irqsave(shost->host_lock, flags);
3433         vport->flags &= ~FC_VPORT_CREATING;
3434         spin_unlock_irqrestore(shost->host_lock, flags);
3435
3436         dev_printk(KERN_NOTICE, pdev,
3437                         "%s created via shost%d channel %d\n", dev_name(dev),
3438                         shost->host_no, channel);
3439
3440         *ret_vport = vport;
3441
3442         return 0;
3443
3444 delete_vport_all:
3445         transport_remove_device(dev);
3446         device_del(dev);
3447 delete_vport:
3448         transport_destroy_device(dev);
3449         spin_lock_irqsave(shost->host_lock, flags);
3450         list_del(&vport->peers);
3451         put_device(&shost->shost_gendev);       /* for fc_host->vport list */
3452         fc_host->npiv_vports_inuse--;
3453         spin_unlock_irqrestore(shost->host_lock, flags);
3454         put_device(dev->parent);
3455         kfree(vport);
3456
3457         return error;
3458 }
3459
3460 /**
3461  * fc_vport_create - Admin App or LLDD requests creation of a vport
3462  * @shost:      scsi host the virtual port is connected to.
3463  * @channel:    channel on shost port connected to.
3464  * @ids:        The world wide names, FC4 port roles, etc for
3465  *              the virtual port.
3466  *
3467  * Notes:
3468  *      This routine assumes no locks are held on entry.
3469  */
3470 struct fc_vport *
3471 fc_vport_create(struct Scsi_Host *shost, int channel,
3472         struct fc_vport_identifiers *ids)
3473 {
3474         int stat;
3475         struct fc_vport *vport;
3476
3477         stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3478                  ids, &vport);
3479         return stat ? NULL : vport;
3480 }
3481 EXPORT_SYMBOL(fc_vport_create);
3482
3483 /**
3484  * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3485  * @vport:      fc_vport to be terminated
3486  *
3487  * Calls the LLDD vport_delete() function, then deallocates and removes
3488  * the vport from the shost and object tree.
3489  *
3490  * Notes:
3491  *      This routine assumes no locks are held on entry.
3492  */
3493 int
3494 fc_vport_terminate(struct fc_vport *vport)
3495 {
3496         struct Scsi_Host *shost = vport_to_shost(vport);
3497         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3498         struct fc_internal *i = to_fc_internal(shost->transportt);
3499         struct device *dev = &vport->dev;
3500         unsigned long flags;
3501         int stat;
3502
3503         if (i->f->vport_delete)
3504                 stat = i->f->vport_delete(vport);
3505         else
3506                 stat = -ENOENT;
3507
3508         spin_lock_irqsave(shost->host_lock, flags);
3509         vport->flags &= ~FC_VPORT_DELETING;
3510         if (!stat) {
3511                 vport->flags |= FC_VPORT_DELETED;
3512                 list_del(&vport->peers);
3513                 fc_host->npiv_vports_inuse--;
3514                 put_device(&shost->shost_gendev);  /* for fc_host->vport list */
3515         }
3516         spin_unlock_irqrestore(shost->host_lock, flags);
3517
3518         if (stat)
3519                 return stat;
3520
3521         if (dev->parent != &shost->shost_gendev)
3522                 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3523         transport_remove_device(dev);
3524         device_del(dev);
3525         transport_destroy_device(dev);
3526
3527         /*
3528          * Removing our self-reference should mean our
3529          * release function gets called, which will drop the remaining
3530          * parent reference and free the data structure.
3531          */
3532         put_device(dev);                        /* for self-reference */
3533
3534         return 0; /* SUCCESS */
3535 }
3536 EXPORT_SYMBOL(fc_vport_terminate);
3537
3538 /**
3539  * fc_vport_sched_delete - workq-based delete request for a vport
3540  * @work:       vport to be deleted.
3541  */
3542 static void
3543 fc_vport_sched_delete(struct work_struct *work)
3544 {
3545         struct fc_vport *vport =
3546                 container_of(work, struct fc_vport, vport_delete_work);
3547         int stat;
3548
3549         stat = fc_vport_terminate(vport);
3550         if (stat)
3551                 dev_printk(KERN_ERR, vport->dev.parent,
3552                         "%s: %s could not be deleted created via "
3553                         "shost%d channel %d - error %d\n", __func__,
3554                         dev_name(&vport->dev), vport->shost->host_no,
3555                         vport->channel, stat);
3556 }
3557
3558
3559 /*
3560  * BSG support
3561  */
3562
3563
3564 /**
3565  * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3566  * @job:        fc_bsg_job that is to be torn down
3567  */
3568 static void
3569 fc_destroy_bsgjob(struct fc_bsg_job *job)
3570 {
3571         unsigned long flags;
3572
3573         spin_lock_irqsave(&job->job_lock, flags);
3574         if (job->ref_cnt) {
3575                 spin_unlock_irqrestore(&job->job_lock, flags);
3576                 return;
3577         }
3578         spin_unlock_irqrestore(&job->job_lock, flags);
3579
3580         put_device(job->dev);   /* release reference for the request */
3581
3582         kfree(job->request_payload.sg_list);
3583         kfree(job->reply_payload.sg_list);
3584         kfree(job);
3585 }
3586
3587 /**
3588  * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3589  *                  completed
3590  * @job:        fc_bsg_job that is complete
3591  */
3592 static void
3593 fc_bsg_jobdone(struct fc_bsg_job *job)
3594 {
3595         struct request *req = job->req;
3596         struct request *rsp = req->next_rq;
3597         int err;
3598
3599         err = job->req->errors = job->reply->result;
3600
3601         if (err < 0)
3602                 /* we're only returning the result field in the reply */
3603                 job->req->sense_len = sizeof(uint32_t);
3604         else
3605                 job->req->sense_len = job->reply_len;
3606
3607         /* we assume all request payload was transferred, residual == 0 */
3608         req->resid_len = 0;
3609
3610         if (rsp) {
3611                 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3612
3613                 /* set reply (bidi) residual */
3614                 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3615                                       rsp->resid_len);
3616         }
3617         blk_complete_request(req);
3618 }
3619
3620 /**
3621  * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3622  * @rq:        BSG request that holds the job to be destroyed
3623  */
3624 static void fc_bsg_softirq_done(struct request *rq)
3625 {
3626         struct fc_bsg_job *job = rq->special;
3627         unsigned long flags;
3628
3629         spin_lock_irqsave(&job->job_lock, flags);
3630         job->state_flags |= FC_RQST_STATE_DONE;
3631         job->ref_cnt--;
3632         spin_unlock_irqrestore(&job->job_lock, flags);
3633
3634         blk_end_request_all(rq, rq->errors);
3635         fc_destroy_bsgjob(job);
3636 }
3637
3638 /**
3639  * fc_bsg_job_timeout - handler for when a bsg request timesout
3640  * @req:        request that timed out
3641  */
3642 static enum blk_eh_timer_return
3643 fc_bsg_job_timeout(struct request *req)
3644 {
3645         struct fc_bsg_job *job = (void *) req->special;
3646         struct Scsi_Host *shost = job->shost;
3647         struct fc_internal *i = to_fc_internal(shost->transportt);
3648         unsigned long flags;
3649         int err = 0, done = 0;
3650
3651         if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3652                 return BLK_EH_RESET_TIMER;
3653
3654         spin_lock_irqsave(&job->job_lock, flags);
3655         if (job->state_flags & FC_RQST_STATE_DONE)
3656                 done = 1;
3657         else
3658                 job->ref_cnt++;
3659         spin_unlock_irqrestore(&job->job_lock, flags);
3660
3661         if (!done && i->f->bsg_timeout) {
3662                 /* call LLDD to abort the i/o as it has timed out */
3663                 err = i->f->bsg_timeout(job);
3664                 if (err == -EAGAIN) {
3665                         job->ref_cnt--;
3666                         return BLK_EH_RESET_TIMER;
3667                 } else if (err)
3668                         printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3669                                 "abort failed with status %d\n", err);
3670         }
3671
3672         /* the blk_end_sync_io() doesn't check the error */
3673         if (done)
3674                 return BLK_EH_NOT_HANDLED;
3675         else
3676                 return BLK_EH_HANDLED;
3677 }
3678
3679 static int
3680 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3681 {
3682         size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3683
3684         BUG_ON(!req->nr_phys_segments);
3685
3686         buf->sg_list = kzalloc(sz, GFP_KERNEL);
3687         if (!buf->sg_list)
3688                 return -ENOMEM;
3689         sg_init_table(buf->sg_list, req->nr_phys_segments);
3690         buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3691         buf->payload_len = blk_rq_bytes(req);
3692         return 0;
3693 }
3694
3695
3696 /**
3697  * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3698  *                   bsg request
3699  * @shost:      SCSI Host corresponding to the bsg object
3700  * @rport:      (optional) FC Remote Port corresponding to the bsg object
3701  * @req:        BSG request that needs a job structure
3702  */
3703 static int
3704 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3705         struct request *req)
3706 {
3707         struct fc_internal *i = to_fc_internal(shost->transportt);
3708         struct request *rsp = req->next_rq;
3709         struct fc_bsg_job *job;
3710         int ret;
3711
3712         BUG_ON(req->special);
3713
3714         job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3715                         GFP_KERNEL);
3716         if (!job)
3717                 return -ENOMEM;
3718
3719         /*
3720          * Note: this is a bit silly.
3721          * The request gets formatted as a SGIO v4 ioctl request, which
3722          * then gets reformatted as a blk request, which then gets
3723          * reformatted as a fc bsg request. And on completion, we have
3724          * to wrap return results such that SGIO v4 thinks it was a scsi
3725          * status.  I hope this was all worth it.
3726          */
3727
3728         req->special = job;
3729         job->shost = shost;
3730         job->rport = rport;
3731         job->req = req;
3732         if (i->f->dd_bsg_size)
3733                 job->dd_data = (void *)&job[1];
3734         spin_lock_init(&job->job_lock);
3735         job->request = (struct fc_bsg_request *)req->cmd;
3736         job->request_len = req->cmd_len;
3737         job->reply = req->sense;
3738         job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3739                                                  * allocated */
3740         if (req->bio) {
3741                 ret = fc_bsg_map_buffer(&job->request_payload, req);
3742                 if (ret)
3743                         goto failjob_rls_job;
3744         }
3745         if (rsp && rsp->bio) {
3746                 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3747                 if (ret)
3748                         goto failjob_rls_rqst_payload;
3749         }
3750         job->job_done = fc_bsg_jobdone;
3751         if (rport)
3752                 job->dev = &rport->dev;
3753         else
3754                 job->dev = &shost->shost_gendev;
3755         get_device(job->dev);           /* take a reference for the request */
3756
3757         job->ref_cnt = 1;
3758
3759         return 0;
3760
3761
3762 failjob_rls_rqst_payload:
3763         kfree(job->request_payload.sg_list);
3764 failjob_rls_job:
3765         kfree(job);
3766         return -ENOMEM;
3767 }
3768
3769
3770 enum fc_dispatch_result {
3771         FC_DISPATCH_BREAK,      /* on return, q is locked, break from q loop */
3772         FC_DISPATCH_LOCKED,     /* on return, q is locked, continue on */
3773         FC_DISPATCH_UNLOCKED,   /* on return, q is unlocked, continue on */
3774 };
3775
3776
3777 /**
3778  * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3779  * @q:          fc host request queue
3780  * @shost:      scsi host rport attached to
3781  * @job:        bsg job to be processed
3782  */
3783 static enum fc_dispatch_result
3784 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3785                          struct fc_bsg_job *job)
3786 {
3787         struct fc_internal *i = to_fc_internal(shost->transportt);
3788         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3789         int ret;
3790
3791         /* Validate the host command */
3792         switch (job->request->msgcode) {
3793         case FC_BSG_HST_ADD_RPORT:
3794                 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3795                 break;
3796
3797         case FC_BSG_HST_DEL_RPORT:
3798                 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3799                 break;
3800
3801         case FC_BSG_HST_ELS_NOLOGIN:
3802                 cmdlen += sizeof(struct fc_bsg_host_els);
3803                 /* there better be a xmt and rcv payloads */
3804                 if ((!job->request_payload.payload_len) ||
3805                     (!job->reply_payload.payload_len)) {
3806                         ret = -EINVAL;
3807                         goto fail_host_msg;
3808                 }
3809                 break;
3810
3811         case FC_BSG_HST_CT:
3812                 cmdlen += sizeof(struct fc_bsg_host_ct);
3813                 /* there better be xmt and rcv payloads */
3814                 if ((!job->request_payload.payload_len) ||
3815                     (!job->reply_payload.payload_len)) {
3816                         ret = -EINVAL;
3817                         goto fail_host_msg;
3818                 }
3819                 break;
3820
3821         case FC_BSG_HST_VENDOR:
3822                 cmdlen += sizeof(struct fc_bsg_host_vendor);
3823                 if ((shost->hostt->vendor_id == 0L) ||
3824                     (job->request->rqst_data.h_vendor.vendor_id !=
3825                         shost->hostt->vendor_id)) {
3826                         ret = -ESRCH;
3827                         goto fail_host_msg;
3828                 }
3829                 break;
3830
3831         default:
3832                 ret = -EBADR;
3833                 goto fail_host_msg;
3834         }
3835
3836         /* check if we really have all the request data needed */
3837         if (job->request_len < cmdlen) {
3838                 ret = -ENOMSG;
3839                 goto fail_host_msg;
3840         }
3841
3842         ret = i->f->bsg_request(job);
3843         if (!ret)
3844                 return FC_DISPATCH_UNLOCKED;
3845
3846 fail_host_msg:
3847         /* return the errno failure code as the only status */
3848         BUG_ON(job->reply_len < sizeof(uint32_t));
3849         job->reply->reply_payload_rcv_len = 0;
3850         job->reply->result = ret;
3851         job->reply_len = sizeof(uint32_t);
3852         fc_bsg_jobdone(job);
3853         return FC_DISPATCH_UNLOCKED;
3854 }
3855
3856
3857 /*
3858  * fc_bsg_goose_queue - restart rport queue in case it was stopped
3859  * @rport:      rport to be restarted
3860  */
3861 static void
3862 fc_bsg_goose_queue(struct fc_rport *rport)
3863 {
3864         if (!rport->rqst_q)
3865                 return;
3866
3867         /*
3868          * This get/put dance makes no sense
3869          */
3870         get_device(&rport->dev);
3871         blk_run_queue_async(rport->rqst_q);
3872         put_device(&rport->dev);
3873 }
3874
3875 /**
3876  * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3877  * @q:          rport request queue
3878  * @shost:      scsi host rport attached to
3879  * @rport:      rport request destined to
3880  * @job:        bsg job to be processed
3881  */
3882 static enum fc_dispatch_result
3883 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3884                          struct fc_rport *rport, struct fc_bsg_job *job)
3885 {
3886         struct fc_internal *i = to_fc_internal(shost->transportt);
3887         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3888         int ret;
3889
3890         /* Validate the rport command */
3891         switch (job->request->msgcode) {
3892         case FC_BSG_RPT_ELS:
3893                 cmdlen += sizeof(struct fc_bsg_rport_els);
3894                 goto check_bidi;
3895
3896         case FC_BSG_RPT_CT:
3897                 cmdlen += sizeof(struct fc_bsg_rport_ct);
3898 check_bidi:
3899                 /* there better be xmt and rcv payloads */
3900                 if ((!job->request_payload.payload_len) ||
3901                     (!job->reply_payload.payload_len)) {
3902                         ret = -EINVAL;
3903                         goto fail_rport_msg;
3904                 }
3905                 break;
3906         default:
3907                 ret = -EBADR;
3908                 goto fail_rport_msg;
3909         }
3910
3911         /* check if we really have all the request data needed */
3912         if (job->request_len < cmdlen) {
3913                 ret = -ENOMSG;
3914                 goto fail_rport_msg;
3915         }
3916
3917         ret = i->f->bsg_request(job);
3918         if (!ret)
3919                 return FC_DISPATCH_UNLOCKED;
3920
3921 fail_rport_msg:
3922         /* return the errno failure code as the only status */
3923         BUG_ON(job->reply_len < sizeof(uint32_t));
3924         job->reply->reply_payload_rcv_len = 0;
3925         job->reply->result = ret;
3926         job->reply_len = sizeof(uint32_t);
3927         fc_bsg_jobdone(job);
3928         return FC_DISPATCH_UNLOCKED;
3929 }
3930
3931
3932 /**
3933  * fc_bsg_request_handler - generic handler for bsg requests
3934  * @q:          request queue to manage
3935  * @shost:      Scsi_Host related to the bsg object
3936  * @rport:      FC remote port related to the bsg object (optional)
3937  * @dev:        device structure for bsg object
3938  */
3939 static void
3940 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3941                        struct fc_rport *rport, struct device *dev)
3942 {
3943         struct request *req;
3944         struct fc_bsg_job *job;
3945         enum fc_dispatch_result ret;
3946
3947         if (!get_device(dev))
3948                 return;
3949
3950         while (1) {
3951                 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3952                     !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3953                         break;
3954
3955                 req = blk_fetch_request(q);
3956                 if (!req)
3957                         break;
3958
3959                 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3960                         req->errors = -ENXIO;
3961                         spin_unlock_irq(q->queue_lock);
3962                         blk_end_request_all(req, -ENXIO);
3963                         spin_lock_irq(q->queue_lock);
3964                         continue;
3965                 }
3966
3967                 spin_unlock_irq(q->queue_lock);
3968
3969                 ret = fc_req_to_bsgjob(shost, rport, req);
3970                 if (ret) {
3971                         req->errors = ret;
3972                         blk_end_request_all(req, ret);
3973                         spin_lock_irq(q->queue_lock);
3974                         continue;
3975                 }
3976
3977                 job = req->special;
3978
3979                 /* check if we have the msgcode value at least */
3980                 if (job->request_len < sizeof(uint32_t)) {
3981                         BUG_ON(job->reply_len < sizeof(uint32_t));
3982                         job->reply->reply_payload_rcv_len = 0;
3983                         job->reply->result = -ENOMSG;
3984                         job->reply_len = sizeof(uint32_t);
3985                         fc_bsg_jobdone(job);
3986                         spin_lock_irq(q->queue_lock);
3987                         continue;
3988                 }
3989
3990                 /* the dispatch routines will unlock the queue_lock */
3991                 if (rport)
3992                         ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3993                 else
3994                         ret = fc_bsg_host_dispatch(q, shost, job);
3995
3996                 /* did dispatcher hit state that can't process any more */
3997                 if (ret == FC_DISPATCH_BREAK)
3998                         break;
3999
4000                 /* did dispatcher had released the lock */
4001                 if (ret == FC_DISPATCH_UNLOCKED)
4002                         spin_lock_irq(q->queue_lock);
4003         }
4004
4005         spin_unlock_irq(q->queue_lock);
4006         put_device(dev);
4007         spin_lock_irq(q->queue_lock);
4008 }
4009
4010
4011 /**
4012  * fc_bsg_host_handler - handler for bsg requests for a fc host
4013  * @q:          fc host request queue
4014  */
4015 static void
4016 fc_bsg_host_handler(struct request_queue *q)
4017 {
4018         struct Scsi_Host *shost = q->queuedata;
4019
4020         fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
4021 }
4022
4023
4024 /**
4025  * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4026  * @q:          rport request queue
4027  */
4028 static void
4029 fc_bsg_rport_handler(struct request_queue *q)
4030 {
4031         struct fc_rport *rport = q->queuedata;
4032         struct Scsi_Host *shost = rport_to_shost(rport);
4033
4034         fc_bsg_request_handler(q, shost, rport, &rport->dev);
4035 }
4036
4037
4038 /**
4039  * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4040  * @shost:      shost for fc_host
4041  * @fc_host:    fc_host adding the structures to
4042  */
4043 static int
4044 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4045 {
4046         struct device *dev = &shost->shost_gendev;
4047         struct fc_internal *i = to_fc_internal(shost->transportt);
4048         struct request_queue *q;
4049         int err;
4050         char bsg_name[20];
4051
4052         fc_host->rqst_q = NULL;
4053
4054         if (!i->f->bsg_request)
4055                 return -ENOTSUPP;
4056
4057         snprintf(bsg_name, sizeof(bsg_name),
4058                  "fc_host%d", shost->host_no);
4059
4060         q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4061         if (!q) {
4062                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4063                                 "initialize - no request queue\n",
4064                                  shost->host_no);
4065                 return -ENOMEM;
4066         }
4067
4068         q->queuedata = shost;
4069         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4070         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4071         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4072         blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4073
4074         err = bsg_register_queue(q, dev, bsg_name, NULL);
4075         if (err) {
4076                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4077                                 "initialize - register queue\n",
4078                                 shost->host_no);
4079                 blk_cleanup_queue(q);
4080                 return err;
4081         }
4082
4083         fc_host->rqst_q = q;
4084         return 0;
4085 }
4086
4087
4088 /**
4089  * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4090  * @shost:      shost that rport is attached to
4091  * @rport:      rport that the bsg hooks are being attached to
4092  */
4093 static int
4094 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4095 {
4096         struct device *dev = &rport->dev;
4097         struct fc_internal *i = to_fc_internal(shost->transportt);
4098         struct request_queue *q;
4099         int err;
4100
4101         rport->rqst_q = NULL;
4102
4103         if (!i->f->bsg_request)
4104                 return -ENOTSUPP;
4105
4106         q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4107         if (!q) {
4108                 printk(KERN_ERR "%s: bsg interface failed to "
4109                                 "initialize - no request queue\n",
4110                                  dev->kobj.name);
4111                 return -ENOMEM;
4112         }
4113
4114         q->queuedata = rport;
4115         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4116         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4117         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4118         blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4119
4120         err = bsg_register_queue(q, dev, NULL, NULL);
4121         if (err) {
4122                 printk(KERN_ERR "%s: bsg interface failed to "
4123                                 "initialize - register queue\n",
4124                                  dev->kobj.name);
4125                 blk_cleanup_queue(q);
4126                 return err;
4127         }
4128
4129         rport->rqst_q = q;
4130         return 0;
4131 }
4132
4133
4134 /**
4135  * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4136  * @q:  the request_queue that is to be torn down.
4137  *
4138  * Notes:
4139  *   Before unregistering the queue empty any requests that are blocked
4140  *
4141  *
4142  */
4143 static void
4144 fc_bsg_remove(struct request_queue *q)
4145 {
4146         if (q) {
4147                 bsg_unregister_queue(q);
4148                 blk_cleanup_queue(q);
4149         }
4150 }
4151
4152
4153 /* Original Author:  Martin Hicks */
4154 MODULE_AUTHOR("James Smart");
4155 MODULE_DESCRIPTION("FC Transport Attributes");
4156 MODULE_LICENSE("GPL");
4157
4158 module_init(fc_transport_init);
4159 module_exit(fc_transport_exit);