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) 2004-2005   James Smart, Emulex Corporation
  23  *    Rewrite for host, target, device, and remote port attributes,
  24  *    statistics, and service functions...
  25  *
  26  */
  27 #include <linux/module.h>
  28 #include <linux/init.h>
  29 #include <linux/sched.h>        /* workqueue stuff, HZ */
  30 #include <scsi/scsi_device.h>
  31 #include <scsi/scsi_host.h>
  32 #include <scsi/scsi_transport.h>
  33 #include <scsi/scsi_transport_fc.h>
  34 #include "scsi_priv.h"
  35
  36 /*
  37  * Redefine so that we can have same named attributes in the
  38  * sdev/starget/host objects.
  39  */
  40 #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)          \
  41 struct class_device_attribute class_device_attr_##_prefix##_##_name =   \
  42         __ATTR(_name,_mode,_show,_store)
  43
  44 #define fc_enum_name_search(title, table_type, table)                   \
  45 static const char *get_fc_##title##_name(enum table_type table_key)     \
  46 {                                                                       \
  47         int i;                                                          \
  48         char *name = NULL;                                              \
  49                                                                         \
  50         for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) {          \
  51                 if (table[i].value == table_key) {                      \
  52                         name = table[i].name;                           \
  53                         break;                                          \
  54                 }                                                       \
  55         }                                                               \
  56         return name;                                                    \
  57 }
  58
  59 #define fc_enum_name_match(title, table_type, table)                    \
  60 static int get_fc_##title##_match(const char *table_key,                \
  61                 enum table_type *value)                                 \
  62 {                                                                       \
  63         int i;                                                          \
  64                                                                         \
  65         for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) {          \
  66                 if (strncmp(table_key, table[i].name,                   \
  67                                 table[i].matchlen) == 0) {              \
  68                         *value = table[i].value;                        \
  69                         return 0; /* success */                         \
  70                 }                                                       \
  71         }                                                               \
  72         return 1; /* failure */                                         \
  73 }
  74
  75
  76 /* Convert fc_port_type values to ascii string name */
  77 static struct {
  78         enum fc_port_type       value;
  79         char                    *name;
  80 } fc_port_type_names[] = {
  81         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
  82         { FC_PORTTYPE_OTHER,            "Other" },
  83         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
  84         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
  85         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
  86         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
  87         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection" },
  88 };
  89 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
  90 #define FC_PORTTYPE_MAX_NAMELEN         50
  91
  92
  93 /* Convert fc_port_state values to ascii string name */
  94 static struct {
  95         enum fc_port_state      value;
  96         char                    *name;
  97 } fc_port_state_names[] = {
  98         { FC_PORTSTATE_UNKNOWN,         "Unknown" },
  99         { FC_PORTSTATE_NOTPRESENT,      "Not Present" },
 100         { FC_PORTSTATE_ONLINE,          "Online" },
 101         { FC_PORTSTATE_OFFLINE,         "Offline" },
 102         { FC_PORTSTATE_BLOCKED,         "Blocked" },
 103         { FC_PORTSTATE_BYPASSED,        "Bypassed" },
 104         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics" },
 105         { FC_PORTSTATE_LINKDOWN,        "Linkdown" },
 106         { FC_PORTSTATE_ERROR,           "Error" },
 107         { FC_PORTSTATE_LOOPBACK,        "Loopback" },
 108         { FC_PORTSTATE_DELETED,         "Deleted" },
 109 };
 110 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
 111 #define FC_PORTSTATE_MAX_NAMELEN        20
 112
 113
 114 /* Convert fc_tgtid_binding_type values to ascii string name */
 115 static struct {
 116         enum fc_tgtid_binding_type      value;
 117         char                            *name;
 118         int                             matchlen;
 119 } fc_tgtid_binding_type_names[] = {
 120         { FC_TGTID_BIND_NONE, "none", 4 },
 121         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
 122         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
 123         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
 124 };
 125 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
 126                 fc_tgtid_binding_type_names)
 127 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
 128                 fc_tgtid_binding_type_names)
 129 #define FC_BINDTYPE_MAX_NAMELEN 30
 130
 131
 132 #define fc_bitfield_name_search(title, table)                   \
 133 static ssize_t                                                  \
 134 get_fc_##title##_names(u32 table_key, char *buf)                \
 135 {                                                               \
 136         char *prefix = "";                                      \
 137         ssize_t len = 0;                                        \
 138         int i;                                                  \
 139                                                                 \
 140         for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) {  \
 141                 if (table[i].value & table_key) {               \
 142                         len += sprintf(buf + len, "%s%s",       \
 143                                 prefix, table[i].name);         \
 144                         prefix = ", ";                          \
 145                 }                                               \
 146         }                                                       \
 147         len += sprintf(buf + len, "\n");                        \
 148         return len;                                             \
 149 }
 150
 151
 152 /* Convert FC_COS bit values to ascii string name */
 153 static struct {
 154         u32                     value;
 155         char                    *name;
 156 } fc_cos_names[] = {
 157         { FC_COS_CLASS1,        "Class 1" },
 158         { FC_COS_CLASS2,        "Class 2" },
 159         { FC_COS_CLASS3,        "Class 3" },
 160         { FC_COS_CLASS4,        "Class 4" },
 161         { FC_COS_CLASS6,        "Class 6" },
 162 };
 163 fc_bitfield_name_search(cos, fc_cos_names)
 164
 165
 166 /* Convert FC_PORTSPEED bit values to ascii string name */
 167 static struct {
 168         u32                     value;
 169         char                    *name;
 170 } fc_port_speed_names[] = {
 171         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
 172         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
 173         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
 174         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
 175         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
 176 };
 177 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 178
 179
 180 static int
 181 show_fc_fc4s (char *buf, u8 *fc4_list)
 182 {
 183         int i, len=0;
 184
 185         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 186                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 187         len += sprintf(buf + len, "\n");
 188         return len;
 189 }
 190
 191
 192 /* Convert FC_RPORT_ROLE bit values to ascii string name */
 193 static struct {
 194         u32                     value;
 195         char                    *name;
 196 } fc_remote_port_role_names[] = {
 197         { FC_RPORT_ROLE_FCP_TARGET,     "FCP Target" },
 198         { FC_RPORT_ROLE_FCP_INITIATOR,  "FCP Initiator" },
 199         { FC_RPORT_ROLE_IP_PORT,        "IP Port" },
 200 };
 201 fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names)
 202
 203 /*
 204  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 205  */
 206 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 207 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 208 #define FC_FPORT_PORTID                 0x00000e
 209 #define FC_FABCTLR_PORTID               0x00000d
 210 #define FC_DIRSRVR_PORTID               0x00000c
 211 #define FC_TIMESRVR_PORTID              0x00000b
 212 #define FC_MGMTSRVR_PORTID              0x00000a
 213
 214
 215 static void fc_shost_remove_rports(void  *data);
 216 static void fc_timeout_deleted_rport(void *data);
 217 static void fc_scsi_scan_rport(void *data);
 218 static void fc_rport_terminate(struct fc_rport  *rport);
 219
 220 /*
 221  * Attribute counts pre object type...
 222  * Increase these values if you add attributes
 223  */
 224 #define FC_STARGET_NUM_ATTRS    3
 225 #define FC_RPORT_NUM_ATTRS      9
 226 #define FC_HOST_NUM_ATTRS       16
 227
 228 struct fc_internal {
 229         struct scsi_transport_template t;
 230         struct fc_function_template *f;
 231
 232         /*
 233          * For attributes : each object has :
 234          *   An array of the actual attributes structures
 235          *   An array of null-terminated pointers to the attribute
 236          *     structures - used for mid-layer interaction.
 237          *
 238          * The attribute containers for the starget and host are are
 239          * part of the midlayer. As the remote port is specific to the
 240          * fc transport, we must provide the attribute container.
 241          */
 242         struct class_device_attribute private_starget_attrs[
 243                                                         FC_STARGET_NUM_ATTRS];
 244         struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 245
 246         struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 247         struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 248
 249         struct transport_container rport_attr_cont;
 250         struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 251         struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 252 };
 253
 254 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 255
 256 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 257                            struct class_device *cdev)
 258 {
 259         struct scsi_target *starget = to_scsi_target(dev);
 260         struct fc_rport *rport = starget_to_rport(starget);
 261
 262         /*
 263          * if parent is remote port, use values from remote port.
 264          * Otherwise, this host uses the fc_transport, but not the
 265          * remote port interface. As such, initialize to known non-values.
 266          */
 267         if (rport) {
 268                 fc_starget_node_name(starget) = rport->node_name;
 269                 fc_starget_port_name(starget) = rport->port_name;
 270                 fc_starget_port_id(starget) = rport->port_id;
 271         } else {
 272                 fc_starget_node_name(starget) = -1;
 273                 fc_starget_port_name(starget) = -1;
 274                 fc_starget_port_id(starget) = -1;
 275         }
 276
 277         return 0;
 278 }
 279
 280 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 281                                "fc_transport",
 282                                fc_target_setup,
 283                                NULL,
 284                                NULL);
 285
 286 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 287                          struct class_device *cdev)
 288 {
 289         struct Scsi_Host *shost = dev_to_shost(dev);
 290
 291         /*
 292          * Set default values easily detected by the midlayer as
 293          * failure cases.  The scsi lldd is responsible for initializing
 294          * all transport attributes to valid values per host.
 295          */
 296         fc_host_node_name(shost) = -1;
 297         fc_host_port_name(shost) = -1;
 298         fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED;
 299         memset(fc_host_supported_fc4s(shost), 0,
 300                 sizeof(fc_host_supported_fc4s(shost)));
 301         memset(fc_host_symbolic_name(shost), 0,
 302                 sizeof(fc_host_symbolic_name(shost)));
 303         fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN;
 304         fc_host_maxframe_size(shost) = -1;
 305         memset(fc_host_serial_number(shost), 0,
 306                 sizeof(fc_host_serial_number(shost)));
 307
 308         fc_host_port_id(shost) = -1;
 309         fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
 310         fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
 311         memset(fc_host_active_fc4s(shost), 0,
 312                 sizeof(fc_host_active_fc4s(shost)));
 313         fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 314         fc_host_fabric_name(shost) = -1;
 315
 316         fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN;
 317
 318         INIT_LIST_HEAD(&fc_host_rports(shost));
 319         INIT_LIST_HEAD(&fc_host_rport_bindings(shost));
 320         fc_host_next_rport_number(shost) = 0;
 321         fc_host_next_target_id(shost) = 0;
 322
 323         fc_host_flags(shost) = 0;
 324         INIT_WORK(&fc_host_rport_del_work(shost), fc_shost_remove_rports, shost);
 325         return 0;
 326 }
 327
 328 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 329                                "fc_host",
 330                                fc_host_setup,
 331                                NULL,
 332                                NULL);
 333
 334 /*
 335  * Setup and Remove actions for remote ports are handled
 336  * in the service functions below.
 337  */
 338 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 339                                "fc_remote_ports",
 340                                NULL,
 341                                NULL,
 342                                NULL);
 343
 344 /*
 345  * Module Parameters
 346  */
 347
 348 /*
 349  * dev_loss_tmo: the default number of seconds that the FC transport
 350  *   should insulate the loss of a remote port.
 351  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 352  */
 353 static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT;
 354
 355 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR);
 356 MODULE_PARM_DESC(dev_loss_tmo,
 357                  "Maximum number of seconds that the FC transport should"
 358                  " insulate the loss of a remote port. Once this value is"
 359                  " exceeded, the scsi target is removed. Value should be"
 360                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
 361
 362
 363 static __init int fc_transport_init(void)
 364 {
 365         int error = transport_class_register(&fc_host_class);
 366         if (error)
 367                 return error;
 368         error = transport_class_register(&fc_rport_class);
 369         if (error)
 370                 return error;
 371         return transport_class_register(&fc_transport_class);
 372 }
 373
 374 static void __exit fc_transport_exit(void)
 375 {
 376         transport_class_unregister(&fc_transport_class);
 377         transport_class_unregister(&fc_rport_class);
 378         transport_class_unregister(&fc_host_class);
 379 }
 380
 381 /*
 382  * FC Remote Port Attribute Management
 383  */
 384
 385 #define fc_rport_show_function(field, format_string, sz, cast)          \
 386 static ssize_t                                                          \
 387 show_fc_rport_##field (struct class_device *cdev, char *buf)            \
 388 {                                                                       \
 389         struct fc_rport *rport = transport_class_to_rport(cdev);        \
 390         struct Scsi_Host *shost = rport_to_shost(rport);                \
 391         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 392         if ((i->f->get_rport_##field) &&                                \
 393             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 394               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 395               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 396                 i->f->get_rport_##field(rport);                         \
 397         return snprintf(buf, sz, format_string, cast rport->field);     \
 398 }
 399
 400 #define fc_rport_store_function(field)                                  \
 401 static ssize_t                                                          \
 402 store_fc_rport_##field(struct class_device *cdev, const char *buf,      \
 403                            size_t count)                                \
 404 {                                                                       \
 405         int val;                                                        \
 406         struct fc_rport *rport = transport_class_to_rport(cdev);        \
 407         struct Scsi_Host *shost = rport_to_shost(rport);                \
 408         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 409         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
 410             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
 411             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
 412                 return -EBUSY;                                          \
 413         val = simple_strtoul(buf, NULL, 0);                             \
 414         i->f->set_rport_##field(rport, val);                            \
 415         return count;                                                   \
 416 }
 417
 418 #define fc_rport_rd_attr(field, format_string, sz)                      \
 419         fc_rport_show_function(field, format_string, sz, )              \
 420 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO,                      \
 421                          show_fc_rport_##field, NULL)
 422
 423 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
 424         fc_rport_show_function(field, format_string, sz, (cast))        \
 425 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO,                      \
 426                           show_fc_rport_##field, NULL)
 427
 428 #define fc_rport_rw_attr(field, format_string, sz)                      \
 429         fc_rport_show_function(field, format_string, sz, )              \
 430         fc_rport_store_function(field)                                  \
 431 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,            \
 432                         show_fc_rport_##field,                          \
 433                         store_fc_rport_##field)
 434
 435
 436 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
 437 static ssize_t                                                          \
 438 show_fc_rport_##field (struct class_device *cdev, char *buf)            \
 439 {                                                                       \
 440         struct fc_rport *rport = transport_class_to_rport(cdev);        \
 441         return snprintf(buf, sz, format_string, cast rport->field);     \
 442 }
 443
 444 #define fc_private_rport_rd_attr(field, format_string, sz)              \
 445         fc_private_rport_show_function(field, format_string, sz, )      \
 446 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO,                      \
 447                          show_fc_rport_##field, NULL)
 448
 449 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
 450         fc_private_rport_show_function(field, format_string, sz, (cast)) \
 451 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO,                      \
 452                           show_fc_rport_##field, NULL)
 453
 454
 455 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
 456 static ssize_t                                                          \
 457 show_fc_rport_##title (struct class_device *cdev, char *buf)            \
 458 {                                                                       \
 459         struct fc_rport *rport = transport_class_to_rport(cdev);        \
 460         const char *name;                                               \
 461         name = get_fc_##title##_name(rport->title);                     \
 462         if (!name)                                                      \
 463                 return -EINVAL;                                         \
 464         return snprintf(buf, maxlen, "%s\n", name);                     \
 465 }                                                                       \
 466 static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO,                      \
 467                         show_fc_rport_##title, NULL)
 468
 469
 470 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
 471         i->private_rport_attrs[count] = class_device_attr_rport_##field; \
 472         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 473         i->private_rport_attrs[count].store = NULL;                     \
 474         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 475         if (i->f->show_rport_##field)                                   \
 476                 count++
 477
 478 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
 479         i->private_rport_attrs[count] = class_device_attr_rport_##field; \
 480         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 481         i->private_rport_attrs[count].store = NULL;                     \
 482         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 483         count++
 484
 485 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
 486         i->private_rport_attrs[count] = class_device_attr_rport_##field; \
 487         if (!i->f->set_rport_##field) {                                 \
 488                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
 489                 i->private_rport_attrs[count].store = NULL;             \
 490         }                                                               \
 491         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 492         if (i->f->show_rport_##field)                                   \
 493                 count++
 494
 495
 496 /* The FC Transport Remote Port Attributes: */
 497
 498 /* Fixed Remote Port Attributes */
 499
 500 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
 501
 502 static ssize_t
 503 show_fc_rport_supported_classes (struct class_device *cdev, char *buf)
 504 {
 505         struct fc_rport *rport = transport_class_to_rport(cdev);
 506         if (rport->supported_classes == FC_COS_UNSPECIFIED)
 507                 return snprintf(buf, 20, "unspecified\n");
 508         return get_fc_cos_names(rport->supported_classes, buf);
 509 }
 510 static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
 511                 show_fc_rport_supported_classes, NULL);
 512
 513 /* Dynamic Remote Port Attributes */
 514
 515 /*
 516  * dev_loss_tmo attribute
 517  */
 518 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
 519 static ssize_t
 520 store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf,
 521                            size_t count)
 522 {
 523         int val;
 524         struct fc_rport *rport = transport_class_to_rport(cdev);
 525         struct Scsi_Host *shost = rport_to_shost(rport);
 526         struct fc_internal *i = to_fc_internal(shost->transportt);
 527         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 528             (rport->port_state == FC_PORTSTATE_DELETED) ||
 529             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 530                 return -EBUSY;
 531         val = simple_strtoul(buf, NULL, 0);
 532         if ((val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
 533                 return -EINVAL;
 534         i->f->set_rport_dev_loss_tmo(rport, val);
 535         return count;
 536 }
 537 static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
 538                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
 539
 540
 541 /* Private Remote Port Attributes */
 542
 543 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 544 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 545 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
 546
 547 static ssize_t
 548 show_fc_rport_roles (struct class_device *cdev, char *buf)
 549 {
 550         struct fc_rport *rport = transport_class_to_rport(cdev);
 551
 552         /* identify any roles that are port_id specific */
 553         if ((rport->port_id != -1) &&
 554             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
 555                                         FC_WELLKNOWN_PORTID_MASK) {
 556                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
 557                 case FC_FPORT_PORTID:
 558                         return snprintf(buf, 30, "Fabric Port\n");
 559                 case FC_FABCTLR_PORTID:
 560                         return snprintf(buf, 30, "Fabric Controller\n");
 561                 case FC_DIRSRVR_PORTID:
 562                         return snprintf(buf, 30, "Directory Server\n");
 563                 case FC_TIMESRVR_PORTID:
 564                         return snprintf(buf, 30, "Time Server\n");
 565                 case FC_MGMTSRVR_PORTID:
 566                         return snprintf(buf, 30, "Management Server\n");
 567                 default:
 568                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
 569                 }
 570         } else {
 571                 if (rport->roles == FC_RPORT_ROLE_UNKNOWN)
 572                         return snprintf(buf, 20, "unknown\n");
 573                 return get_fc_remote_port_roles_names(rport->roles, buf);
 574         }
 575 }
 576 static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO,
 577                 show_fc_rport_roles, NULL);
 578
 579 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 580 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
 581
 582
 583
 584 /*
 585  * FC SCSI Target Attribute Management
 586  */
 587
 588 /*
 589  * Note: in the target show function we recognize when the remote
 590  *  port is in the heirarchy and do not allow the driver to get
 591  *  involved in sysfs functions. The driver only gets involved if
 592  *  it's the "old" style that doesn't use rports.
 593  */
 594 #define fc_starget_show_function(field, format_string, sz, cast)        \
 595 static ssize_t                                                          \
 596 show_fc_starget_##field (struct class_device *cdev, char *buf)          \
 597 {                                                                       \
 598         struct scsi_target *starget = transport_class_to_starget(cdev); \
 599         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
 600         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 601         struct fc_rport *rport = starget_to_rport(starget);             \
 602         if (rport)                                                      \
 603                 fc_starget_##field(starget) = rport->field;             \
 604         else if (i->f->get_starget_##field)                             \
 605                 i->f->get_starget_##field(starget);                     \
 606         return snprintf(buf, sz, format_string,                         \
 607                 cast fc_starget_##field(starget));                      \
 608 }
 609
 610 #define fc_starget_rd_attr(field, format_string, sz)                    \
 611         fc_starget_show_function(field, format_string, sz, )            \
 612 static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO,                    \
 613                          show_fc_starget_##field, NULL)
 614
 615 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
 616         fc_starget_show_function(field, format_string, sz, (cast))      \
 617 static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO,                    \
 618                           show_fc_starget_##field, NULL)
 619
 620 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
 621         i->private_starget_attrs[count] = class_device_attr_starget_##field; \
 622         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
 623         i->private_starget_attrs[count].store = NULL;                   \
 624         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
 625         if (i->f->show_starget_##field)                                 \
 626                 count++
 627
 628 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
 629         i->private_starget_attrs[count] = class_device_attr_starget_##field; \
 630         if (!i->f->set_starget_##field) {                               \
 631                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
 632                 i->private_starget_attrs[count].store = NULL;           \
 633         }                                                               \
 634         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
 635         if (i->f->show_starget_##field)                                 \
 636                 count++
 637
 638 /* The FC Transport SCSI Target Attributes: */
 639 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 640 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 641 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
 642
 643
 644 /*
 645  * Host Attribute Management
 646  */
 647
 648 #define fc_host_show_function(field, format_string, sz, cast)           \
 649 static ssize_t                                                          \
 650 show_fc_host_##field (struct class_device *cdev, char *buf)             \
 651 {                                                                       \
 652         struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
 653         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 654         if (i->f->get_host_##field)                                     \
 655                 i->f->get_host_##field(shost);                          \
 656         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
 657 }
 658
 659 #define fc_host_store_function(field)                                   \
 660 static ssize_t                                                          \
 661 store_fc_host_##field(struct class_device *cdev, const char *buf,       \
 662                            size_t count)                                \
 663 {                                                                       \
 664         int val;                                                        \
 665         struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
 666         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 667                                                                         \
 668         val = simple_strtoul(buf, NULL, 0);                             \
 669         i->f->set_host_##field(shost, val);                             \
 670         return count;                                                   \
 671 }
 672
 673 #define fc_host_rd_attr(field, format_string, sz)                       \
 674         fc_host_show_function(field, format_string, sz, )               \
 675 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO,                       \
 676                          show_fc_host_##field, NULL)
 677
 678 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
 679         fc_host_show_function(field, format_string, sz, (cast))         \
 680 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO,                       \
 681                           show_fc_host_##field, NULL)
 682
 683 #define fc_host_rw_attr(field, format_string, sz)                       \
 684         fc_host_show_function(field, format_string, sz, )               \
 685         fc_host_store_function(field)                                   \
 686 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,             \
 687                         show_fc_host_##field,                           \
 688                         store_fc_host_##field)
 689
 690 #define fc_host_rd_enum_attr(title, maxlen)                             \
 691 static ssize_t                                                          \
 692 show_fc_host_##title (struct class_device *cdev, char *buf)             \
 693 {                                                                       \
 694         struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
 695         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 696         const char *name;                                               \
 697         if (i->f->get_host_##title)                                     \
 698                 i->f->get_host_##title(shost);                          \
 699         name = get_fc_##title##_name(fc_host_##title(shost));           \
 700         if (!name)                                                      \
 701                 return -EINVAL;                                         \
 702         return snprintf(buf, maxlen, "%s\n", name);                     \
 703 }                                                                       \
 704 static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
 705
 706 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
 707         i->private_host_attrs[count] = class_device_attr_host_##field;  \
 708         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
 709         i->private_host_attrs[count].store = NULL;                      \
 710         i->host_attrs[count] = &i->private_host_attrs[count];           \
 711         if (i->f->show_host_##field)                                    \
 712                 count++
 713
 714 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
 715         i->private_host_attrs[count] = class_device_attr_host_##field;  \
 716         if (!i->f->set_host_##field) {                                  \
 717                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
 718                 i->private_host_attrs[count].store = NULL;              \
 719         }                                                               \
 720         i->host_attrs[count] = &i->private_host_attrs[count];           \
 721         if (i->f->show_host_##field)                                    \
 722                 count++
 723
 724
 725 #define fc_private_host_show_function(field, format_string, sz, cast)   \
 726 static ssize_t                                                          \
 727 show_fc_host_##field (struct class_device *cdev, char *buf)             \
 728 {                                                                       \
 729         struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
 730         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
 731 }
 732
 733 #define fc_private_host_rd_attr(field, format_string, sz)               \
 734         fc_private_host_show_function(field, format_string, sz, )       \
 735 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO,                       \
 736                          show_fc_host_##field, NULL)
 737
 738 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
 739         fc_private_host_show_function(field, format_string, sz, (cast)) \
 740 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO,                       \
 741                           show_fc_host_##field, NULL)
 742
 743 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
 744         i->private_host_attrs[count] = class_device_attr_host_##field;  \
 745         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
 746         i->private_host_attrs[count].store = NULL;                      \
 747         i->host_attrs[count] = &i->private_host_attrs[count];           \
 748         count++
 749
 750 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
 751 {                                                                       \
 752         i->private_host_attrs[count] = class_device_attr_host_##field;  \
 753         i->host_attrs[count] = &i->private_host_attrs[count];           \
 754         count++;                                                        \
 755 }
 756
 757
 758 /* Fixed Host Attributes */
 759
 760 static ssize_t
 761 show_fc_host_supported_classes (struct class_device *cdev, char *buf)
 762 {
 763         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 764
 765         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
 766                 return snprintf(buf, 20, "unspecified\n");
 767
 768         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
 769 }
 770 static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO,
 771                 show_fc_host_supported_classes, NULL);
 772
 773 static ssize_t
 774 show_fc_host_supported_fc4s (struct class_device *cdev, char *buf)
 775 {
 776         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 777         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
 778 }
 779 static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
 780                 show_fc_host_supported_fc4s, NULL);
 781
 782 static ssize_t
 783 show_fc_host_supported_speeds (struct class_device *cdev, char *buf)
 784 {
 785         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 786
 787         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
 788                 return snprintf(buf, 20, "unknown\n");
 789
 790         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
 791 }
 792 static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
 793                 show_fc_host_supported_speeds, NULL);
 794
 795
 796 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 797 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 798 fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1));
 799 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
 800 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
 801
 802
 803 /* Dynamic Host Attributes */
 804
 805 static ssize_t
 806 show_fc_host_active_fc4s (struct class_device *cdev, char *buf)
 807 {
 808         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 809         struct fc_internal *i = to_fc_internal(shost->transportt);
 810
 811         if (i->f->get_host_active_fc4s)
 812                 i->f->get_host_active_fc4s(shost);
 813
 814         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
 815 }
 816 static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
 817                 show_fc_host_active_fc4s, NULL);
 818
 819 static ssize_t
 820 show_fc_host_speed (struct class_device *cdev, char *buf)
 821 {
 822         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 823         struct fc_internal *i = to_fc_internal(shost->transportt);
 824
 825         if (i->f->get_host_speed)
 826                 i->f->get_host_speed(shost);
 827
 828         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
 829                 return snprintf(buf, 20, "unknown\n");
 830
 831         return get_fc_port_speed_names(fc_host_speed(shost), buf);
 832 }
 833 static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO,
 834                 show_fc_host_speed, NULL);
 835
 836
 837 fc_host_rd_attr(port_id, "0x%06x\n", 20);
 838 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
 839 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 840 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
 841
 842
 843 /* Private Host Attributes */
 844
 845 static ssize_t
 846 show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf)
 847 {
 848         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 849         const char *name;
 850
 851         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
 852         if (!name)
 853                 return -EINVAL;
 854         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
 855 }
 856
 857 #define get_list_head_entry(pos, head, member)          \
 858         pos = list_entry((head)->next, typeof(*pos), member)
 859
 860 static ssize_t
 861 store_fc_private_host_tgtid_bind_type(struct class_device *cdev,
 862         const char *buf, size_t count)
 863 {
 864         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 865         struct fc_rport *rport;
 866         enum fc_tgtid_binding_type val;
 867         unsigned long flags;
 868
 869         if (get_fc_tgtid_bind_type_match(buf, &val))
 870                 return -EINVAL;
 871
 872         /* if changing bind type, purge all unused consistent bindings */
 873         if (val != fc_host_tgtid_bind_type(shost)) {
 874                 spin_lock_irqsave(shost->host_lock, flags);
 875                 while (!list_empty(&fc_host_rport_bindings(shost))) {
 876                         get_list_head_entry(rport,
 877                                 &fc_host_rport_bindings(shost), peers);
 878                         spin_unlock_irqrestore(shost->host_lock, flags);
 879                         fc_rport_terminate(rport);
 880                         spin_lock_irqsave(shost->host_lock, flags);
 881                 }
 882                 spin_unlock_irqrestore(shost->host_lock, flags);
 883         }
 884
 885         fc_host_tgtid_bind_type(shost) = val;
 886         return count;
 887 }
 888
 889 static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
 890                         show_fc_private_host_tgtid_bind_type,
 891                         store_fc_private_host_tgtid_bind_type);
 892
 893 static ssize_t
 894 store_fc_private_host_issue_lip(struct class_device *cdev,
 895         const char *buf, size_t count)
 896 {
 897         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 898         struct fc_internal *i = to_fc_internal(shost->transportt);
 899         int ret;
 900
 901         /* ignore any data value written to the attribute */
 902         if (i->f->issue_fc_host_lip) {
 903                 ret = i->f->issue_fc_host_lip(shost);
 904                 return ret ? ret: count;
 905         }
 906
 907         return -ENOENT;
 908 }
 909
 910 static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
 911                         store_fc_private_host_issue_lip);
 912
 913 /*
 914  * Host Statistics Management
 915  */
 916
 917 /* Show a given an attribute in the statistics group */
 918 static ssize_t
 919 fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset)
 920 {
 921         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 922         struct fc_internal *i = to_fc_internal(shost->transportt);
 923         struct fc_host_statistics *stats;
 924         ssize_t ret = -ENOENT;
 925
 926         if (offset > sizeof(struct fc_host_statistics) ||
 927             offset % sizeof(u64) != 0)
 928                 WARN_ON(1);
 929
 930         if (i->f->get_fc_host_stats) {
 931                 stats = (i->f->get_fc_host_stats)(shost);
 932                 if (stats)
 933                         ret = snprintf(buf, 20, "0x%llx\n",
 934                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
 935         }
 936         return ret;
 937 }
 938
 939
 940 /* generate a read-only statistics attribute */
 941 #define fc_host_statistic(name)                                         \
 942 static ssize_t show_fcstat_##name(struct class_device *cd, char *buf)   \
 943 {                                                                       \
 944         return fc_stat_show(cd, buf,                                    \
 945                             offsetof(struct fc_host_statistics, name)); \
 946 }                                                                       \
 947 static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
 948
 949 fc_host_statistic(seconds_since_last_reset);
 950 fc_host_statistic(tx_frames);
 951 fc_host_statistic(tx_words);
 952 fc_host_statistic(rx_frames);
 953 fc_host_statistic(rx_words);
 954 fc_host_statistic(lip_count);
 955 fc_host_statistic(nos_count);
 956 fc_host_statistic(error_frames);
 957 fc_host_statistic(dumped_frames);
 958 fc_host_statistic(link_failure_count);
 959 fc_host_statistic(loss_of_sync_count);
 960 fc_host_statistic(loss_of_signal_count);
 961 fc_host_statistic(prim_seq_protocol_err_count);
 962 fc_host_statistic(invalid_tx_word_count);
 963 fc_host_statistic(invalid_crc_count);
 964 fc_host_statistic(fcp_input_requests);
 965 fc_host_statistic(fcp_output_requests);
 966 fc_host_statistic(fcp_control_requests);
 967 fc_host_statistic(fcp_input_megabytes);
 968 fc_host_statistic(fcp_output_megabytes);
 969
 970 static ssize_t
 971 fc_reset_statistics(struct class_device *cdev, const char *buf,
 972                            size_t count)
 973 {
 974         struct Scsi_Host *shost = transport_class_to_shost(cdev);
 975         struct fc_internal *i = to_fc_internal(shost->transportt);
 976
 977         /* ignore any data value written to the attribute */
 978         if (i->f->reset_fc_host_stats) {
 979                 i->f->reset_fc_host_stats(shost);
 980                 return count;
 981         }
 982
 983         return -ENOENT;
 984 }
 985 static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
 986                                 fc_reset_statistics);
 987
 988
 989 static struct attribute *fc_statistics_attrs[] = {
 990         &class_device_attr_host_seconds_since_last_reset.attr,
 991         &class_device_attr_host_tx_frames.attr,
 992         &class_device_attr_host_tx_words.attr,
 993         &class_device_attr_host_rx_frames.attr,
 994         &class_device_attr_host_rx_words.attr,
 995         &class_device_attr_host_lip_count.attr,
 996         &class_device_attr_host_nos_count.attr,
 997         &class_device_attr_host_error_frames.attr,
 998         &class_device_attr_host_dumped_frames.attr,
 999         &class_device_attr_host_link_failure_count.attr,
1000         &class_device_attr_host_loss_of_sync_count.attr,
1001         &class_device_attr_host_loss_of_signal_count.attr,
1002         &class_device_attr_host_prim_seq_protocol_err_count.attr,
1003         &class_device_attr_host_invalid_tx_word_count.attr,
1004         &class_device_attr_host_invalid_crc_count.attr,
1005         &class_device_attr_host_fcp_input_requests.attr,
1006         &class_device_attr_host_fcp_output_requests.attr,
1007         &class_device_attr_host_fcp_control_requests.attr,
1008         &class_device_attr_host_fcp_input_megabytes.attr,
1009         &class_device_attr_host_fcp_output_megabytes.attr,
1010         &class_device_attr_host_reset_statistics.attr,
1011         NULL
1012 };
1013
1014 static struct attribute_group fc_statistics_group = {
1015         .name = "statistics",
1016         .attrs = fc_statistics_attrs,
1017 };
1018
1019 static int fc_host_match(struct attribute_container *cont,
1020                           struct device *dev)
1021 {
1022         struct Scsi_Host *shost;
1023         struct fc_internal *i;
1024
1025         if (!scsi_is_host_device(dev))
1026                 return 0;
1027
1028         shost = dev_to_shost(dev);
1029         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1030             != &fc_host_class.class)
1031                 return 0;
1032
1033         i = to_fc_internal(shost->transportt);
1034
1035         return &i->t.host_attrs.ac == cont;
1036 }
1037
1038 static int fc_target_match(struct attribute_container *cont,
1039                             struct device *dev)
1040 {
1041         struct Scsi_Host *shost;
1042         struct fc_internal *i;
1043
1044         if (!scsi_is_target_device(dev))
1045                 return 0;
1046
1047         shost = dev_to_shost(dev->parent);
1048         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1049             != &fc_host_class.class)
1050                 return 0;
1051
1052         i = to_fc_internal(shost->transportt);
1053
1054         return &i->t.target_attrs.ac == cont;
1055 }
1056
1057 static void fc_rport_dev_release(struct device *dev)
1058 {
1059         struct fc_rport *rport = dev_to_rport(dev);
1060         put_device(dev->parent);
1061         kfree(rport);
1062 }
1063
1064 int scsi_is_fc_rport(const struct device *dev)
1065 {
1066         return dev->release == fc_rport_dev_release;
1067 }
1068 EXPORT_SYMBOL(scsi_is_fc_rport);
1069
1070 static int fc_rport_match(struct attribute_container *cont,
1071                             struct device *dev)
1072 {
1073         struct Scsi_Host *shost;
1074         struct fc_internal *i;
1075
1076         if (!scsi_is_fc_rport(dev))
1077                 return 0;
1078
1079         shost = dev_to_shost(dev->parent);
1080         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1081             != &fc_host_class.class)
1082                 return 0;
1083
1084         i = to_fc_internal(shost->transportt);
1085
1086         return &i->rport_attr_cont.ac == cont;
1087 }
1088
1089
1090 /*
1091  * Must be called with shost->host_lock held
1092  */
1093 static struct device *fc_target_parent(struct Scsi_Host *shost,
1094                                         int channel, uint id)
1095 {
1096         struct fc_rport *rport;
1097
1098         list_for_each_entry(rport, &fc_host_rports(shost), peers)
1099                 if ((rport->channel == channel) &&
1100                     (rport->scsi_target_id == id))
1101                         return &rport->dev;
1102
1103         return NULL;
1104 }
1105
1106 struct scsi_transport_template *
1107 fc_attach_transport(struct fc_function_template *ft)
1108 {
1109         struct fc_internal *i = kmalloc(sizeof(struct fc_internal),
1110                                         GFP_KERNEL);
1111         int count;
1112
1113         if (unlikely(!i))
1114                 return NULL;
1115
1116         memset(i, 0, sizeof(struct fc_internal));
1117
1118         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
1119         i->t.target_attrs.ac.class = &fc_transport_class.class;
1120         i->t.target_attrs.ac.match = fc_target_match;
1121         i->t.target_size = sizeof(struct fc_starget_attrs);
1122         transport_container_register(&i->t.target_attrs);
1123
1124         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1125         i->t.host_attrs.ac.class = &fc_host_class.class;
1126         i->t.host_attrs.ac.match = fc_host_match;
1127         i->t.host_size = sizeof(struct fc_host_attrs);
1128         if (ft->get_fc_host_stats)
1129                 i->t.host_attrs.statistics = &fc_statistics_group;
1130         transport_container_register(&i->t.host_attrs);
1131
1132         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
1133         i->rport_attr_cont.ac.class = &fc_rport_class.class;
1134         i->rport_attr_cont.ac.match = fc_rport_match;
1135         transport_container_register(&i->rport_attr_cont);
1136
1137         i->f = ft;
1138
1139         /* Transport uses the shost workq for scsi scanning */
1140         i->t.create_work_queue = 1;
1141
1142         i->t.target_parent = fc_target_parent;
1143
1144         /*
1145          * Setup SCSI Target Attributes.
1146          */
1147         count = 0;
1148         SETUP_STARGET_ATTRIBUTE_RD(node_name);
1149         SETUP_STARGET_ATTRIBUTE_RD(port_name);
1150         SETUP_STARGET_ATTRIBUTE_RD(port_id);
1151
1152         BUG_ON(count > FC_STARGET_NUM_ATTRS);
1153
1154         i->starget_attrs[count] = NULL;
1155
1156
1157         /*
1158          * Setup SCSI Host Attributes.
1159          */
1160         count=0;
1161         SETUP_HOST_ATTRIBUTE_RD(node_name);
1162         SETUP_HOST_ATTRIBUTE_RD(port_name);
1163         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
1164         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1165         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
1166         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
1167         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
1168         SETUP_HOST_ATTRIBUTE_RD(serial_number);
1169
1170         SETUP_HOST_ATTRIBUTE_RD(port_id);
1171         SETUP_HOST_ATTRIBUTE_RD(port_type);
1172         SETUP_HOST_ATTRIBUTE_RD(port_state);
1173         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
1174         SETUP_HOST_ATTRIBUTE_RD(speed);
1175         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
1176
1177         /* Transport-managed attributes */
1178         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
1179         if (ft->issue_fc_host_lip)
1180                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
1181
1182         BUG_ON(count > FC_HOST_NUM_ATTRS);
1183
1184         i->host_attrs[count] = NULL;
1185
1186         /*
1187          * Setup Remote Port Attributes.
1188          */
1189         count=0;
1190         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
1191         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
1192         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
1193         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
1194         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
1195         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
1196         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
1197         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
1198         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
1199
1200         BUG_ON(count > FC_RPORT_NUM_ATTRS);
1201
1202         i->rport_attrs[count] = NULL;
1203
1204         return &i->t;
1205 }
1206 EXPORT_SYMBOL(fc_attach_transport);
1207
1208 void fc_release_transport(struct scsi_transport_template *t)
1209 {
1210         struct fc_internal *i = to_fc_internal(t);
1211
1212         transport_container_unregister(&i->t.target_attrs);
1213         transport_container_unregister(&i->t.host_attrs);
1214         transport_container_unregister(&i->rport_attr_cont);
1215
1216         kfree(i);
1217 }
1218 EXPORT_SYMBOL(fc_release_transport);
1219
1220
1221 /**
1222  * fc_remove_host - called to terminate any fc_transport-related elements
1223  *                  for a scsi host.
1224  * @rport:      remote port to be unblocked.
1225  *
1226  * This routine is expected to be called immediately preceeding the
1227  * a driver's call to scsi_remove_host().
1228  *
1229  * WARNING: A driver utilizing the fc_transport, which fails to call
1230  *   this routine prior to scsi_remote_host(), will leave dangling
1231  *   objects in /sys/class/fc_remote_ports. Access to any of these
1232  *   objects can result in a system crash !!!
1233  *
1234  * Notes:
1235  *      This routine assumes no locks are held on entry.
1236  **/
1237 void
1238 fc_remove_host(struct Scsi_Host *shost)
1239 {
1240         struct fc_rport *rport, *next_rport;
1241
1242         /* Remove any remote ports */
1243         list_for_each_entry_safe(rport, next_rport,
1244                         &fc_host_rports(shost), peers)
1245                 fc_rport_terminate(rport);
1246         list_for_each_entry_safe(rport, next_rport,
1247                         &fc_host_rport_bindings(shost), peers)
1248                 fc_rport_terminate(rport);
1249 }
1250 EXPORT_SYMBOL(fc_remove_host);
1251
1252 /*
1253  * fc_rport_tgt_remove - Removes the scsi target on the remote port
1254  * @rport:      The remote port to be operated on
1255  */
1256 static void
1257 fc_rport_tgt_remove(struct fc_rport *rport)
1258 {
1259         struct Scsi_Host *shost = rport_to_shost(rport);
1260
1261         scsi_target_unblock(&rport->dev);
1262
1263         /* Stop anything on the workq */
1264         if (!cancel_delayed_work(&rport->dev_loss_work))
1265                 flush_scheduled_work();
1266         scsi_flush_work(shost);
1267
1268         scsi_remove_target(&rport->dev);
1269 }
1270
1271 /**
1272  * fc_rport_create - allocates and creates a remote FC port.
1273  * @shost:      scsi host the remote port is connected to.
1274  * @channel:    Channel on shost port connected to.
1275  * @ids:        The world wide names, fc address, and FC4 port
1276  *              roles for the remote port.
1277  *
1278  * Allocates and creates the remoter port structure, including the
1279  * class and sysfs creation.
1280  *
1281  * Notes:
1282  *      This routine assumes no locks are held on entry.
1283  **/
1284 struct fc_rport *
1285 fc_rport_create(struct Scsi_Host *shost, int channel,
1286         struct fc_rport_identifiers  *ids)
1287 {
1288         struct fc_host_attrs *fc_host =
1289                         (struct fc_host_attrs *)shost->shost_data;
1290         struct fc_internal *fci = to_fc_internal(shost->transportt);
1291         struct fc_rport *rport;
1292         struct device *dev;
1293         unsigned long flags;
1294         int error;
1295         size_t size;
1296
1297         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
1298         rport = kmalloc(size, GFP_KERNEL);
1299         if (unlikely(!rport)) {
1300                 printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
1301                 return NULL;
1302         }
1303         memset(rport, 0, size);
1304
1305         rport->maxframe_size = -1;
1306         rport->supported_classes = FC_COS_UNSPECIFIED;
1307         rport->dev_loss_tmo = fc_dev_loss_tmo;
1308         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
1309         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
1310         rport->port_id = ids->port_id;
1311         rport->roles = ids->roles;
1312         rport->port_state = FC_PORTSTATE_ONLINE;
1313         if (fci->f->dd_fcrport_size)
1314                 rport->dd_data = &rport[1];
1315         rport->channel = channel;
1316
1317         INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport);
1318         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport);
1319
1320         spin_lock_irqsave(shost->host_lock, flags);
1321
1322         rport->number = fc_host->next_rport_number++;
1323         if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1324                 rport->scsi_target_id = fc_host->next_target_id++;
1325         else
1326                 rport->scsi_target_id = -1;
1327         list_add_tail(&rport->peers, &fc_host_rports(shost));
1328         get_device(&shost->shost_gendev);
1329
1330         spin_unlock_irqrestore(shost->host_lock, flags);
1331
1332         dev = &rport->dev;
1333         device_initialize(dev);
1334         dev->parent = get_device(&shost->shost_gendev);
1335         dev->release = fc_rport_dev_release;
1336         sprintf(dev->bus_id, "rport-%d:%d-%d",
1337                 shost->host_no, channel, rport->number);
1338         transport_setup_device(dev);
1339
1340         error = device_add(dev);
1341         if (error) {
1342                 printk(KERN_ERR "FC Remote Port device_add failed\n");
1343                 goto delete_rport;
1344         }
1345         transport_add_device(dev);
1346         transport_configure_device(dev);
1347
1348         if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1349                 /* initiate a scan of the target */
1350                 scsi_queue_work(shost, &rport->scan_work);
1351
1352         return rport;
1353
1354 delete_rport:
1355         transport_destroy_device(dev);
1356         put_device(dev->parent);
1357         spin_lock_irqsave(shost->host_lock, flags);
1358         list_del(&rport->peers);
1359         put_device(&shost->shost_gendev);
1360         spin_unlock_irqrestore(shost->host_lock, flags);
1361         put_device(dev->parent);
1362         kfree(rport);
1363         return NULL;
1364 }
1365
1366 /**
1367  * fc_remote_port_add - notifies the fc transport of the existence
1368  *              of a remote FC port.
1369  * @shost:      scsi host the remote port is connected to.
1370  * @channel:    Channel on shost port connected to.
1371  * @ids:        The world wide names, fc address, and FC4 port
1372  *              roles for the remote port.
1373  *
1374  * The LLDD calls this routine to notify the transport of the existence
1375  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
1376  * of the port, it's FC address (port_id), and the FC4 roles that are
1377  * active for the port.
1378  *
1379  * For ports that are FCP targets (aka scsi targets), the FC transport
1380  * maintains consistent target id bindings on behalf of the LLDD.
1381  * A consistent target id binding is an assignment of a target id to
1382  * a remote port identifier, which persists while the scsi host is
1383  * attached. The remote port can disappear, then later reappear, and
1384  * it's target id assignment remains the same. This allows for shifts
1385  * in FC addressing (if binding by wwpn or wwnn) with no apparent
1386  * changes to the scsi subsystem which is based on scsi host number and
1387  * target id values.  Bindings are only valid during the attachment of
1388  * the scsi host. If the host detaches, then later re-attaches, target
1389  * id bindings may change.
1390  *
1391  * This routine is responsible for returning a remote port structure.
1392  * The routine will search the list of remote ports it maintains
1393  * internally on behalf of consistent target id mappings. If found, the
1394  * remote port structure will be reused. Otherwise, a new remote port
1395  * structure will be allocated.
1396  *
1397  * Whenever a remote port is allocated, a new fc_remote_port class
1398  * device is created.
1399  *
1400  * Should not be called from interrupt context.
1401  *
1402  * Notes:
1403  *      This routine assumes no locks are held on entry.
1404  **/
1405 struct fc_rport *
1406 fc_remote_port_add(struct Scsi_Host *shost, int channel,
1407         struct fc_rport_identifiers  *ids)
1408 {
1409         struct fc_internal *fci = to_fc_internal(shost->transportt);
1410         struct fc_rport *rport;
1411         unsigned long flags;
1412         int match = 0;
1413
1414         /*
1415          * Search the list of "active" rports, for an rport that has been
1416          * deleted, but we've held off the real delete while the target
1417          * is in a "blocked" state.
1418          */
1419         spin_lock_irqsave(shost->host_lock, flags);
1420
1421         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1422
1423                 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
1424                         (rport->channel == channel)) {
1425
1426                         switch (fc_host_tgtid_bind_type(shost)) {
1427                         case FC_TGTID_BIND_BY_WWPN:
1428                         case FC_TGTID_BIND_NONE:
1429                                 if (rport->port_name == ids->port_name)
1430                                         match = 1;
1431                                 break;
1432                         case FC_TGTID_BIND_BY_WWNN:
1433                                 if (rport->node_name == ids->node_name)
1434                                         match = 1;
1435                                 break;
1436                         case FC_TGTID_BIND_BY_ID:
1437                                 if (rport->port_id == ids->port_id)
1438                                         match = 1;
1439                                 break;
1440                         }
1441
1442                         if (match) {
1443                                 struct work_struct *work =
1444                                                         &rport->dev_loss_work;
1445
1446                                 memcpy(&rport->node_name, &ids->node_name,
1447                                         sizeof(rport->node_name));
1448                                 memcpy(&rport->port_name, &ids->port_name,
1449                                         sizeof(rport->port_name));
1450                                 rport->port_id = ids->port_id;
1451
1452                                 rport->port_state = FC_PORTSTATE_ONLINE;
1453                                 rport->roles = ids->roles;
1454
1455                                 spin_unlock_irqrestore(shost->host_lock, flags);
1456
1457                                 if (fci->f->dd_fcrport_size)
1458                                         memset(rport->dd_data, 0,
1459                                                 fci->f->dd_fcrport_size);
1460
1461                                 /*
1462                                  * If we were blocked, we were a target.
1463                                  * If no longer a target, we leave the timer
1464                                  * running in case the port changes roles
1465                                  * prior to the timer expiring. If the timer
1466                                  * fires, the target will be torn down.
1467                                  */
1468                                 if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET))
1469                                         return rport;
1470
1471                                 /* restart the target */
1472
1473                                 /*
1474                                  * Stop the target timer first. Take no action
1475                                  * on the del_timer failure as the state
1476                                  * machine state change will validate the
1477                                  * transaction.
1478                                  */
1479                                 if (!cancel_delayed_work(work))
1480                                         flush_scheduled_work();
1481
1482                                 /* initiate a scan of the target */
1483                                 scsi_queue_work(shost, &rport->scan_work);
1484
1485                                 return rport;
1486                         }
1487                 }
1488         }
1489
1490         /* Search the bindings array */
1491         if (likely((ids->roles & FC_RPORT_ROLE_FCP_TARGET) &&
1492                 (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE))) {
1493
1494                 /* search for a matching consistent binding */
1495
1496                 list_for_each_entry(rport, &fc_host_rport_bindings(shost),
1497                                         peers) {
1498                         if (rport->channel != channel)
1499                                 continue;
1500
1501                         switch (fc_host_tgtid_bind_type(shost)) {
1502                         case FC_TGTID_BIND_BY_WWPN:
1503                                 if (rport->port_name == ids->port_name)
1504                                         match = 1;
1505                                 break;
1506                         case FC_TGTID_BIND_BY_WWNN:
1507                                 if (rport->node_name == ids->node_name)
1508                                         match = 1;
1509                                 break;
1510                         case FC_TGTID_BIND_BY_ID:
1511                                 if (rport->port_id == ids->port_id)
1512                                         match = 1;
1513                                 break;
1514                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
1515                                 break;
1516                         }
1517
1518                         if (match) {
1519                                 list_move_tail(&rport->peers,
1520                                         &fc_host_rports(shost));
1521                                 break;
1522                         }
1523                 }
1524
1525                 if (match) {
1526                         memcpy(&rport->node_name, &ids->node_name,
1527                                 sizeof(rport->node_name));
1528                         memcpy(&rport->port_name, &ids->port_name,
1529                                 sizeof(rport->port_name));
1530                         rport->port_id = ids->port_id;
1531                         rport->roles = ids->roles;
1532                         rport->port_state = FC_PORTSTATE_ONLINE;
1533
1534                         spin_unlock_irqrestore(shost->host_lock, flags);
1535
1536                         if (fci->f->dd_fcrport_size)
1537                                 memset(rport->dd_data, 0,
1538                                                 fci->f->dd_fcrport_size);
1539
1540                         if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1541                                 /* initiate a scan of the target */
1542                                 scsi_queue_work(shost, &rport->scan_work);
1543
1544                         return rport;
1545                 }
1546         }
1547
1548         spin_unlock_irqrestore(shost->host_lock, flags);
1549
1550         /* No consistent binding found - create new remote port entry */
1551         rport = fc_rport_create(shost, channel, ids);
1552
1553         return rport;
1554 }
1555 EXPORT_SYMBOL(fc_remote_port_add);
1556
1557 /*
1558  * fc_rport_terminate - this routine tears down and deallocates a remote port.
1559  * @rport:      The remote port to be terminated
1560  *
1561  * Notes:
1562  *      This routine assumes no locks are held on entry.
1563  */
1564 static void
1565 fc_rport_terminate(struct fc_rport  *rport)
1566 {
1567         struct Scsi_Host *shost = rport_to_shost(rport);
1568         struct device *dev = &rport->dev;
1569         unsigned long flags;
1570
1571         fc_rport_tgt_remove(rport);
1572
1573         transport_remove_device(dev);
1574         device_del(dev);
1575         transport_destroy_device(dev);
1576         spin_lock_irqsave(shost->host_lock, flags);
1577         list_del(&rport->peers);
1578         spin_unlock_irqrestore(shost->host_lock, flags);
1579         put_device(&shost->shost_gendev);
1580 }
1581
1582 /**
1583  * fc_remote_port_delete - notifies the fc transport that a remote
1584  *              port is no longer in existence.
1585  * @rport:      The remote port that no longer exists
1586  *
1587  * The LLDD calls this routine to notify the transport that a remote
1588  * port is no longer part of the topology. Note: Although a port
1589  * may no longer be part of the topology, it may persist in the remote
1590  * ports displayed by the fc_host. We do this under 2 conditions:
1591  * - If the port was a scsi target, we delay its deletion by "blocking" it.
1592  *   This allows the port to temporarily disappear, then reappear without
1593  *   disrupting the SCSI device tree attached to it. During the "blocked"
1594  *   period the port will still exist.
1595  * - If the port was a scsi target and disappears for longer than we
1596  *   expect, we'll delete the port and the tear down the SCSI device tree
1597  *   attached to it. However, we want to semi-persist the target id assigned
1598  *   to that port if it eventually does exist. The port structure will
1599  *   remain (although with minimal information) so that the target id
1600  *   bindings remails.
1601  *
1602  * If the remote port is not an FCP Target, it will be fully torn down
1603  * and deallocated, including the fc_remote_port class device.
1604  *
1605  * If the remote port is an FCP Target, the port will be placed in a
1606  * temporary blocked state. From the LLDD's perspective, the rport no
1607  * longer exists. From the SCSI midlayer's perspective, the SCSI target
1608  * exists, but all sdevs on it are blocked from further I/O. The following
1609  * is then expected:
1610  *   If the remote port does not return (signaled by a LLDD call to
1611  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
1612  *   scsi target is removed - killing all outstanding i/o and removing the
1613  *   scsi devices attached ot it. The port structure will be marked Not
1614  *   Present and be partially cleared, leaving only enough information to
1615  *   recognize the remote port relative to the scsi target id binding if
1616  *   it later appears.  The port will remain as long as there is a valid
1617  *   binding (e.g. until the user changes the binding type or unloads the
1618  *   scsi host with the binding).
1619  *
1620  *   If the remote port returns within the dev_loss_tmo value (and matches
1621  *   according to the target id binding type), the port structure will be
1622  *   reused. If it is no longer a SCSI target, the target will be torn
1623  *   down. If it continues to be a SCSI target, then the target will be
1624  *   unblocked (allowing i/o to be resumed), and a scan will be activated
1625  *   to ensure that all luns are detected.
1626  *
1627  * Called from normal process context only - cannot be called from interrupt.
1628  *
1629  * Notes:
1630  *      This routine assumes no locks are held on entry.
1631  **/
1632 void
1633 fc_remote_port_delete(struct fc_rport  *rport)
1634 {
1635         int timeout = rport->dev_loss_tmo;
1636
1637         /* If no scsi target id mapping, delete it */
1638         if (rport->scsi_target_id == -1) {
1639                 fc_rport_terminate(rport);
1640                 return;
1641         }
1642
1643         scsi_target_block(&rport->dev);
1644
1645         /* cap the length the devices can be blocked until they are deleted */
1646         schedule_delayed_work(&rport->dev_loss_work, timeout * HZ);
1647
1648         rport->port_state = FC_PORTSTATE_BLOCKED;
1649 }
1650 EXPORT_SYMBOL(fc_remote_port_delete);
1651
1652 /**
1653  * fc_remote_port_rolechg - notifies the fc transport that the roles
1654  *              on a remote may have changed.
1655  * @rport:      The remote port that changed.
1656  *
1657  * The LLDD calls this routine to notify the transport that the roles
1658  * on a remote port may have changed. The largest effect of this is
1659  * if a port now becomes a FCP Target, it must be allocated a
1660  * scsi target id.  If the port is no longer a FCP target, any
1661  * scsi target id value assigned to it will persist in case the
1662  * role changes back to include FCP Target. No changes in the scsi
1663  * midlayer will be invoked if the role changes (in the expectation
1664  * that the role will be resumed. If it doesn't normal error processing
1665  * will take place).
1666  *
1667  * Should not be called from interrupt context.
1668  *
1669  * Notes:
1670  *      This routine assumes no locks are held on entry.
1671  **/
1672 void
1673 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
1674 {
1675         struct Scsi_Host *shost = rport_to_shost(rport);
1676         struct fc_host_attrs *fc_host =
1677                         (struct fc_host_attrs *)shost->shost_data;
1678         unsigned long flags;
1679         int create = 0;
1680
1681         spin_lock_irqsave(shost->host_lock, flags);
1682         if (roles & FC_RPORT_ROLE_FCP_TARGET) {
1683                 if (rport->scsi_target_id == -1) {
1684                         rport->scsi_target_id = fc_host->next_target_id++;
1685                         create = 1;
1686                 } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
1687                         create = 1;
1688         }
1689         spin_unlock_irqrestore(shost->host_lock, flags);
1690
1691         rport->roles = roles;
1692
1693         if (create) {
1694                 /*
1695                  * There may have been a delete timer running on the
1696                  * port. Ensure that it is cancelled as we now know
1697                  * the port is an FCP Target.
1698                  * Note: we know the rport is exists and in an online
1699                  *  state as the LLDD would not have had an rport
1700                  *  reference to pass us.
1701                  *
1702                  * Take no action on the del_timer failure as the state
1703                  * machine state change will validate the
1704                  * transaction.
1705                  */
1706                 if (!cancel_delayed_work(&rport->dev_loss_work))
1707                         flush_scheduled_work();
1708
1709                 /* initiate a scan of the target */
1710                 scsi_queue_work(shost, &rport->scan_work);
1711         }
1712 }
1713 EXPORT_SYMBOL(fc_remote_port_rolechg);
1714
1715 /**
1716  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that
1717  *                       was a SCSI target (thus was blocked), and failed
1718  *                       to return in the alloted time.
1719  *
1720  * @data:       rport target that failed to reappear in the alloted time.
1721  **/
1722 static void
1723 fc_timeout_deleted_rport(void  *data)
1724 {
1725         struct fc_rport *rport = (struct fc_rport *)data;
1726         struct Scsi_Host *shost = rport_to_shost(rport);
1727         unsigned long flags;
1728
1729         spin_lock_irqsave(shost->host_lock, flags);
1730
1731         /*
1732          * If the port is ONLINE, then it came back, but was no longer an
1733          * FCP target. Thus we need to tear down the scsi_target on it.
1734          */
1735         if (rport->port_state == FC_PORTSTATE_ONLINE) {
1736                 spin_unlock_irqrestore(shost->host_lock, flags);
1737
1738                 dev_printk(KERN_ERR, &rport->dev,
1739                         "blocked FC remote port time out: removing target\n");
1740
1741                 fc_rport_tgt_remove(rport);
1742
1743                 return;
1744         }
1745
1746         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
1747                 spin_unlock_irqrestore(shost->host_lock, flags);
1748                 dev_printk(KERN_ERR, &rport->dev,
1749                         "blocked FC remote port time out: leaving target alone\n");
1750                 return;
1751         }
1752
1753         if (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE) {
1754                 spin_unlock_irqrestore(shost->host_lock, flags);
1755                 dev_printk(KERN_ERR, &rport->dev,
1756                         "blocked FC remote port time out: removing target\n");
1757                 fc_rport_terminate(rport);
1758                 return;
1759         }
1760
1761         dev_printk(KERN_ERR, &rport->dev,
1762                 "blocked FC remote port time out: removing target and "
1763                 "saving binding\n");
1764
1765         list_move_tail(&rport->peers, &fc_host_rport_bindings(shost));
1766
1767         /*
1768          * Note: We do not remove or clear the hostdata area. This allows
1769          *   host-specific target data to persist along with the
1770          *   scsi_target_id. It's up to the host to manage it's hostdata area.
1771          */
1772
1773         /*
1774          * Reinitialize port attributes that may change if the port comes back.
1775          */
1776         rport->maxframe_size = -1;
1777         rport->supported_classes = FC_COS_UNSPECIFIED;
1778         rport->roles = FC_RPORT_ROLE_UNKNOWN;
1779         rport->port_state = FC_PORTSTATE_DELETED;
1780
1781         /* remove the identifiers that aren't used in the consisting binding */
1782         switch (fc_host_tgtid_bind_type(shost)) {
1783         case FC_TGTID_BIND_BY_WWPN:
1784                 rport->node_name = -1;
1785                 rport->port_id = -1;
1786                 break;
1787         case FC_TGTID_BIND_BY_WWNN:
1788                 rport->port_name = -1;
1789                 rport->port_id = -1;
1790                 break;
1791         case FC_TGTID_BIND_BY_ID:
1792                 rport->node_name = -1;
1793                 rport->port_name = -1;
1794                 break;
1795         case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
1796                 break;
1797         }
1798
1799         /*
1800          * As this only occurs if the remote port (scsi target)
1801          * went away and didn't come back - we'll remove
1802          * all attached scsi devices.
1803          *
1804          * We'll schedule the shost work item to perform the actual removal
1805          * to avoid recursion in the different flush calls if we perform
1806          * the removal in each target - and there are lots of targets
1807          * whose timeouts fire at the same time.
1808          */
1809
1810         if ( !(fc_host_flags(shost) & FC_SHOST_RPORT_DEL_SCHEDULED)) {
1811                 fc_host_flags(shost) |= FC_SHOST_RPORT_DEL_SCHEDULED;
1812                 scsi_queue_work(shost, &fc_host_rport_del_work(shost));
1813         }
1814
1815         spin_unlock_irqrestore(shost->host_lock, flags);
1816 }
1817
1818 /**
1819  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
1820  *
1821  * Will unblock the target (in case it went away and has now come back),
1822  * then invoke a scan.
1823  *
1824  * @data:       remote port to be scanned.
1825  **/
1826 static void
1827 fc_scsi_scan_rport(void *data)
1828 {
1829         struct fc_rport *rport = (struct fc_rport *)data;
1830
1831         scsi_target_unblock(&rport->dev);
1832         scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id,
1833                         SCAN_WILD_CARD, 1);
1834 }
1835
1836
1837 /**
1838  * fc_shost_remove_rports - called to remove all rports that are marked
1839  *                       as in a deleted (not connected) state.
1840  *
1841  * @data:       shost whose rports are to be looked at
1842  **/
1843 static void
1844 fc_shost_remove_rports(void  *data)
1845 {
1846         struct Scsi_Host *shost = (struct Scsi_Host *)data;
1847         struct fc_rport *rport, *next_rport;
1848         unsigned long flags;
1849
1850         spin_lock_irqsave(shost->host_lock, flags);
1851         while (fc_host_flags(shost) & FC_SHOST_RPORT_DEL_SCHEDULED) {
1852
1853                 fc_host_flags(shost) &= ~FC_SHOST_RPORT_DEL_SCHEDULED;
1854
1855 restart_search:
1856                 list_for_each_entry_safe(rport, next_rport,
1857                                 &fc_host_rport_bindings(shost), peers) {
1858                         if (rport->port_state == FC_PORTSTATE_DELETED) {
1859                                 rport->port_state = FC_PORTSTATE_NOTPRESENT;
1860                                 spin_unlock_irqrestore(shost->host_lock, flags);
1861                                 fc_rport_tgt_remove(rport);
1862                                 spin_lock_irqsave(shost->host_lock, flags);
1863                                 goto restart_search;
1864                         }
1865                 }
1866
1867         }
1868         spin_unlock_irqrestore(shost->host_lock, flags);
1869 }
1870
1871
1872 MODULE_AUTHOR("Martin Hicks");
1873 MODULE_DESCRIPTION("FC Transport Attributes");
1874 MODULE_LICENSE("GPL");
1875
1876 module_init(fc_transport_init);
1877 module_exit(fc_transport_exit);