drivers/scsi/scsi_transport_fc.c

   1 /*
   2  *  FiberChannel transport specific attributes exported to sysfs.
   3  *
   4  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ========
  21  *
  22  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
  23  *    Rewrite for host, target, device, and remote port attributes,
  24  *    statistics, and service functions...
  25  *    Add vports, etc
  26  *
  27  */
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32 #include <linux/kernel.h>
  33 #include <linux/bsg-lib.h>
  34 #include <scsi/scsi_device.h>
  35 #include <scsi/scsi_host.h>
  36 #include <scsi/scsi_transport.h>
  37 #include <scsi/scsi_transport_fc.h>
  38 #include <scsi/scsi_cmnd.h>
  39 #include <net/netlink.h>
  40 #include <scsi/scsi_netlink_fc.h>
  41 #include <scsi/scsi_bsg_fc.h>
  42 #include "scsi_priv.h"
  43
  44 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
  45 static void fc_vport_sched_delete(struct work_struct *work);
  46 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
  47         struct device *pdev, struct fc_vport_identifiers  *ids,
  48         struct fc_vport **vport);
  49 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
  50 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
  51 static void fc_bsg_remove(struct request_queue *);
  52 static void fc_bsg_goose_queue(struct fc_rport *);
  53
  54 /*
  55  * Module Parameters
  56  */
  57
  58 /*
  59  * dev_loss_tmo: the default number of seconds that the FC transport
  60  *   should insulate the loss of a remote port.
  61  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
  62  */
  63 static unsigned int fc_dev_loss_tmo = 60;               /* seconds */
  64
  65 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
  66 MODULE_PARM_DESC(dev_loss_tmo,
  67                  "Maximum number of seconds that the FC transport should"
  68                  " insulate the loss of a remote port. Once this value is"
  69                  " exceeded, the scsi target is removed. Value should be"
  70                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
  71                  " fast_io_fail_tmo is not set.");
  72
  73 /*
  74  * Redefine so that we can have same named attributes in the
  75  * sdev/starget/host objects.
  76  */
  77 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)                \
  78 struct device_attribute device_attr_##_prefix##_##_name =       \
  79         __ATTR(_name,_mode,_show,_store)
  80
  81 #define fc_enum_name_search(title, table_type, table)                   \
  82 static const char *get_fc_##title##_name(enum table_type table_key)     \
  83 {                                                                       \
  84         int i;                                                          \
  85         char *name = NULL;                                              \
  86                                                                         \
  87         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
  88                 if (table[i].value == table_key) {                      \
  89                         name = table[i].name;                           \
  90                         break;                                          \
  91                 }                                                       \
  92         }                                                               \
  93         return name;                                                    \
  94 }
  95
  96 #define fc_enum_name_match(title, table_type, table)                    \
  97 static int get_fc_##title##_match(const char *table_key,                \
  98                 enum table_type *value)                                 \
  99 {                                                                       \
 100         int i;                                                          \
 101                                                                         \
 102         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
 103                 if (strncmp(table_key, table[i].name,                   \
 104                                 table[i].matchlen) == 0) {              \
 105                         *value = table[i].value;                        \
 106                         return 0; /* success */                         \
 107                 }                                                       \
 108         }                                                               \
 109         return 1; /* failure */                                         \
 110 }
 111
 112
 113 /* Convert fc_port_type values to ascii string name */
 114 static struct {
 115         enum fc_port_type       value;
 116         char                    *name;
 117 } fc_port_type_names[] = {
 118         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
 119         { FC_PORTTYPE_OTHER,            "Other" },
 120         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
 121         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
 122         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
 123         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
 124         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection)" },
 125         { FC_PORTTYPE_NPIV,             "NPIV VPORT" },
 126 };
 127 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
 128 #define FC_PORTTYPE_MAX_NAMELEN         50
 129
 130 /* Reuse fc_port_type enum function for vport_type */
 131 #define get_fc_vport_type_name get_fc_port_type_name
 132
 133
 134 /* Convert fc_host_event_code values to ascii string name */
 135 static const struct {
 136         enum fc_host_event_code         value;
 137         char                            *name;
 138 } fc_host_event_code_names[] = {
 139         { FCH_EVT_LIP,                  "lip" },
 140         { FCH_EVT_LINKUP,               "link_up" },
 141         { FCH_EVT_LINKDOWN,             "link_down" },
 142         { FCH_EVT_LIPRESET,             "lip_reset" },
 143         { FCH_EVT_RSCN,                 "rscn" },
 144         { FCH_EVT_ADAPTER_CHANGE,       "adapter_chg" },
 145         { FCH_EVT_PORT_UNKNOWN,         "port_unknown" },
 146         { FCH_EVT_PORT_ONLINE,          "port_online" },
 147         { FCH_EVT_PORT_OFFLINE,         "port_offline" },
 148         { FCH_EVT_PORT_FABRIC,          "port_fabric" },
 149         { FCH_EVT_LINK_UNKNOWN,         "link_unknown" },
 150         { FCH_EVT_VENDOR_UNIQUE,        "vendor_unique" },
 151 };
 152 fc_enum_name_search(host_event_code, fc_host_event_code,
 153                 fc_host_event_code_names)
 154 #define FC_HOST_EVENT_CODE_MAX_NAMELEN  30
 155
 156
 157 /* Convert fc_port_state values to ascii string name */
 158 static struct {
 159         enum fc_port_state      value;
 160         char                    *name;
 161 } fc_port_state_names[] = {
 162         { FC_PORTSTATE_UNKNOWN,         "Unknown" },
 163         { FC_PORTSTATE_NOTPRESENT,      "Not Present" },
 164         { FC_PORTSTATE_ONLINE,          "Online" },
 165         { FC_PORTSTATE_OFFLINE,         "Offline" },
 166         { FC_PORTSTATE_BLOCKED,         "Blocked" },
 167         { FC_PORTSTATE_BYPASSED,        "Bypassed" },
 168         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics" },
 169         { FC_PORTSTATE_LINKDOWN,        "Linkdown" },
 170         { FC_PORTSTATE_ERROR,           "Error" },
 171         { FC_PORTSTATE_LOOPBACK,        "Loopback" },
 172         { FC_PORTSTATE_DELETED,         "Deleted" },
 173 };
 174 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
 175 #define FC_PORTSTATE_MAX_NAMELEN        20
 176
 177
 178 /* Convert fc_vport_state values to ascii string name */
 179 static struct {
 180         enum fc_vport_state     value;
 181         char                    *name;
 182 } fc_vport_state_names[] = {
 183         { FC_VPORT_UNKNOWN,             "Unknown" },
 184         { FC_VPORT_ACTIVE,              "Active" },
 185         { FC_VPORT_DISABLED,            "Disabled" },
 186         { FC_VPORT_LINKDOWN,            "Linkdown" },
 187         { FC_VPORT_INITIALIZING,        "Initializing" },
 188         { FC_VPORT_NO_FABRIC_SUPP,      "No Fabric Support" },
 189         { FC_VPORT_NO_FABRIC_RSCS,      "No Fabric Resources" },
 190         { FC_VPORT_FABRIC_LOGOUT,       "Fabric Logout" },
 191         { FC_VPORT_FABRIC_REJ_WWN,      "Fabric Rejected WWN" },
 192         { FC_VPORT_FAILED,              "VPort Failed" },
 193 };
 194 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
 195 #define FC_VPORTSTATE_MAX_NAMELEN       24
 196
 197 /* Reuse fc_vport_state enum function for vport_last_state */
 198 #define get_fc_vport_last_state_name get_fc_vport_state_name
 199
 200
 201 /* Convert fc_tgtid_binding_type values to ascii string name */
 202 static const struct {
 203         enum fc_tgtid_binding_type      value;
 204         char                            *name;
 205         int                             matchlen;
 206 } fc_tgtid_binding_type_names[] = {
 207         { FC_TGTID_BIND_NONE, "none", 4 },
 208         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
 209         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
 210         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
 211 };
 212 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
 213                 fc_tgtid_binding_type_names)
 214 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
 215                 fc_tgtid_binding_type_names)
 216 #define FC_BINDTYPE_MAX_NAMELEN 30
 217
 218
 219 #define fc_bitfield_name_search(title, table)                   \
 220 static ssize_t                                                  \
 221 get_fc_##title##_names(u32 table_key, char *buf)                \
 222 {                                                               \
 223         char *prefix = "";                                      \
 224         ssize_t len = 0;                                        \
 225         int i;                                                  \
 226                                                                 \
 227         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 228                 if (table[i].value & table_key) {               \
 229                         len += sprintf(buf + len, "%s%s",       \
 230                                 prefix, table[i].name);         \
 231                         prefix = ", ";                          \
 232                 }                                               \
 233         }                                                       \
 234         len += sprintf(buf + len, "\n");                        \
 235         return len;                                             \
 236 }
 237
 238
 239 /* Convert FC_COS bit values to ascii string name */
 240 static const struct {
 241         u32                     value;
 242         char                    *name;
 243 } fc_cos_names[] = {
 244         { FC_COS_CLASS1,        "Class 1" },
 245         { FC_COS_CLASS2,        "Class 2" },
 246         { FC_COS_CLASS3,        "Class 3" },
 247         { FC_COS_CLASS4,        "Class 4" },
 248         { FC_COS_CLASS6,        "Class 6" },
 249 };
 250 fc_bitfield_name_search(cos, fc_cos_names)
 251
 252
 253 /* Convert FC_PORTSPEED bit values to ascii string name */
 254 static const struct {
 255         u32                     value;
 256         char                    *name;
 257 } fc_port_speed_names[] = {
 258         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
 259         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
 260         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
 261         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
 262         { FC_PORTSPEED_8GBIT,           "8 Gbit" },
 263         { FC_PORTSPEED_16GBIT,          "16 Gbit" },
 264         { FC_PORTSPEED_32GBIT,          "32 Gbit" },
 265         { FC_PORTSPEED_20GBIT,          "20 Gbit" },
 266         { FC_PORTSPEED_40GBIT,          "40 Gbit" },
 267         { FC_PORTSPEED_50GBIT,          "50 Gbit" },
 268         { FC_PORTSPEED_100GBIT,         "100 Gbit" },
 269         { FC_PORTSPEED_25GBIT,          "25 Gbit" },
 270         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
 271 };
 272 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 273
 274
 275 static int
 276 show_fc_fc4s (char *buf, u8 *fc4_list)
 277 {
 278         int i, len=0;
 279
 280         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 281                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 282         len += sprintf(buf + len, "\n");
 283         return len;
 284 }
 285
 286
 287 /* Convert FC_PORT_ROLE bit values to ascii string name */
 288 static const struct {
 289         u32                     value;
 290         char                    *name;
 291 } fc_port_role_names[] = {
 292         { FC_PORT_ROLE_FCP_TARGET,              "FCP Target" },
 293         { FC_PORT_ROLE_FCP_INITIATOR,           "FCP Initiator" },
 294         { FC_PORT_ROLE_IP_PORT,                 "IP Port" },
 295         { FC_PORT_ROLE_FCP_DUMMY_INITIATOR,     "FCP Dummy Initiator" },
 296 };
 297 fc_bitfield_name_search(port_roles, fc_port_role_names)
 298
 299 /*
 300  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 301  */
 302 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 303 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 304 #define FC_FPORT_PORTID                 0x00000e
 305 #define FC_FABCTLR_PORTID               0x00000d
 306 #define FC_DIRSRVR_PORTID               0x00000c
 307 #define FC_TIMESRVR_PORTID              0x00000b
 308 #define FC_MGMTSRVR_PORTID              0x00000a
 309
 310
 311 static void fc_timeout_deleted_rport(struct work_struct *work);
 312 static void fc_timeout_fail_rport_io(struct work_struct *work);
 313 static void fc_scsi_scan_rport(struct work_struct *work);
 314
 315 /*
 316  * Attribute counts pre object type...
 317  * Increase these values if you add attributes
 318  */
 319 #define FC_STARGET_NUM_ATTRS    3
 320 #define FC_RPORT_NUM_ATTRS      10
 321 #define FC_VPORT_NUM_ATTRS      9
 322 #define FC_HOST_NUM_ATTRS       29
 323
 324 struct fc_internal {
 325         struct scsi_transport_template t;
 326         struct fc_function_template *f;
 327
 328         /*
 329          * For attributes : each object has :
 330          *   An array of the actual attributes structures
 331          *   An array of null-terminated pointers to the attribute
 332          *     structures - used for mid-layer interaction.
 333          *
 334          * The attribute containers for the starget and host are are
 335          * part of the midlayer. As the remote port is specific to the
 336          * fc transport, we must provide the attribute container.
 337          */
 338         struct device_attribute private_starget_attrs[
 339                                                         FC_STARGET_NUM_ATTRS];
 340         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 341
 342         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 343         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 344
 345         struct transport_container rport_attr_cont;
 346         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 347         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 348
 349         struct transport_container vport_attr_cont;
 350         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
 351         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
 352 };
 353
 354 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 355
 356 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 357                            struct device *cdev)
 358 {
 359         struct scsi_target *starget = to_scsi_target(dev);
 360         struct fc_rport *rport = starget_to_rport(starget);
 361
 362         /*
 363          * if parent is remote port, use values from remote port.
 364          * Otherwise, this host uses the fc_transport, but not the
 365          * remote port interface. As such, initialize to known non-values.
 366          */
 367         if (rport) {
 368                 fc_starget_node_name(starget) = rport->node_name;
 369                 fc_starget_port_name(starget) = rport->port_name;
 370                 fc_starget_port_id(starget) = rport->port_id;
 371         } else {
 372                 fc_starget_node_name(starget) = -1;
 373                 fc_starget_port_name(starget) = -1;
 374                 fc_starget_port_id(starget) = -1;
 375         }
 376
 377         return 0;
 378 }
 379
 380 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 381                                "fc_transport",
 382                                fc_target_setup,
 383                                NULL,
 384                                NULL);
 385
 386 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 387                          struct device *cdev)
 388 {
 389         struct Scsi_Host *shost = dev_to_shost(dev);
 390         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 391
 392         /*
 393          * Set default values easily detected by the midlayer as
 394          * failure cases.  The scsi lldd is responsible for initializing
 395          * all transport attributes to valid values per host.
 396          */
 397         fc_host->node_name = -1;
 398         fc_host->port_name = -1;
 399         fc_host->permanent_port_name = -1;
 400         fc_host->supported_classes = FC_COS_UNSPECIFIED;
 401         memset(fc_host->supported_fc4s, 0,
 402                 sizeof(fc_host->supported_fc4s));
 403         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
 404         fc_host->maxframe_size = -1;
 405         fc_host->max_npiv_vports = 0;
 406         memset(fc_host->serial_number, 0,
 407                 sizeof(fc_host->serial_number));
 408         memset(fc_host->manufacturer, 0,
 409                 sizeof(fc_host->manufacturer));
 410         memset(fc_host->model, 0,
 411                 sizeof(fc_host->model));
 412         memset(fc_host->model_description, 0,
 413                 sizeof(fc_host->model_description));
 414         memset(fc_host->hardware_version, 0,
 415                 sizeof(fc_host->hardware_version));
 416         memset(fc_host->driver_version, 0,
 417                 sizeof(fc_host->driver_version));
 418         memset(fc_host->firmware_version, 0,
 419                 sizeof(fc_host->firmware_version));
 420         memset(fc_host->optionrom_version, 0,
 421                 sizeof(fc_host->optionrom_version));
 422
 423         fc_host->port_id = -1;
 424         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
 425         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
 426         memset(fc_host->active_fc4s, 0,
 427                 sizeof(fc_host->active_fc4s));
 428         fc_host->speed = FC_PORTSPEED_UNKNOWN;
 429         fc_host->fabric_name = -1;
 430         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
 431         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
 432
 433         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
 434
 435         INIT_LIST_HEAD(&fc_host->rports);
 436         INIT_LIST_HEAD(&fc_host->rport_bindings);
 437         INIT_LIST_HEAD(&fc_host->vports);
 438         fc_host->next_rport_number = 0;
 439         fc_host->next_target_id = 0;
 440         fc_host->next_vport_number = 0;
 441         fc_host->npiv_vports_inuse = 0;
 442
 443         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
 444                  "fc_wq_%d", shost->host_no);
 445         fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
 446         if (!fc_host->work_q)
 447                 return -ENOMEM;
 448
 449         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
 450         snprintf(fc_host->devloss_work_q_name,
 451                  sizeof(fc_host->devloss_work_q_name),
 452                  "fc_dl_%d", shost->host_no);
 453         fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
 454                                         fc_host->devloss_work_q_name);
 455         if (!fc_host->devloss_work_q) {
 456                 destroy_workqueue(fc_host->work_q);
 457                 fc_host->work_q = NULL;
 458                 return -ENOMEM;
 459         }
 460
 461         fc_bsg_hostadd(shost, fc_host);
 462         /* ignore any bsg add error - we just can't do sgio */
 463
 464         return 0;
 465 }
 466
 467 static int fc_host_remove(struct transport_container *tc, struct device *dev,
 468                          struct device *cdev)
 469 {
 470         struct Scsi_Host *shost = dev_to_shost(dev);
 471         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 472
 473         fc_bsg_remove(fc_host->rqst_q);
 474         return 0;
 475 }
 476
 477 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 478                                "fc_host",
 479                                fc_host_setup,
 480                                fc_host_remove,
 481                                NULL);
 482
 483 /*
 484  * Setup and Remove actions for remote ports are handled
 485  * in the service functions below.
 486  */
 487 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 488                                "fc_remote_ports",
 489                                NULL,
 490                                NULL,
 491                                NULL);
 492
 493 /*
 494  * Setup and Remove actions for virtual ports are handled
 495  * in the service functions below.
 496  */
 497 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
 498                                "fc_vports",
 499                                NULL,
 500                                NULL,
 501                                NULL);
 502
 503 /*
 504  * Netlink Infrastructure
 505  */
 506
 507 static atomic_t fc_event_seq;
 508
 509 /**
 510  * fc_get_event_number - Obtain the next sequential FC event number
 511  *
 512  * Notes:
 513  *   We could have inlined this, but it would have required fc_event_seq to
 514  *   be exposed. For now, live with the subroutine call.
 515  *   Atomic used to avoid lock/unlock...
 516  */
 517 u32
 518 fc_get_event_number(void)
 519 {
 520         return atomic_add_return(1, &fc_event_seq);
 521 }
 522 EXPORT_SYMBOL(fc_get_event_number);
 523
 524
 525 /**
 526  * fc_host_post_event - called to post an even on an fc_host.
 527  * @shost:              host the event occurred on
 528  * @event_number:       fc event number obtained from get_fc_event_number()
 529  * @event_code:         fc_host event being posted
 530  * @event_data:         32bits of data for the event being posted
 531  *
 532  * Notes:
 533  *      This routine assumes no locks are held on entry.
 534  */
 535 void
 536 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 537                 enum fc_host_event_code event_code, u32 event_data)
 538 {
 539         struct sk_buff *skb;
 540         struct nlmsghdr *nlh;
 541         struct fc_nl_event *event;
 542         const char *name;
 543         u32 len;
 544         int err;
 545
 546         if (!scsi_nl_sock) {
 547                 err = -ENOENT;
 548                 goto send_fail;
 549         }
 550
 551         len = FC_NL_MSGALIGN(sizeof(*event));
 552
 553         skb = nlmsg_new(len, GFP_KERNEL);
 554         if (!skb) {
 555                 err = -ENOBUFS;
 556                 goto send_fail;
 557         }
 558
 559         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 560         if (!nlh) {
 561                 err = -ENOBUFS;
 562                 goto send_fail_skb;
 563         }
 564         event = nlmsg_data(nlh);
 565
 566         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 567                                 FC_NL_ASYNC_EVENT, len);
 568         event->seconds = get_seconds();
 569         event->vendor_id = 0;
 570         event->host_no = shost->host_no;
 571         event->event_datalen = sizeof(u32);     /* bytes */
 572         event->event_num = event_number;
 573         event->event_code = event_code;
 574         event->event_data = event_data;
 575
 576         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 577                         GFP_KERNEL);
 578         return;
 579
 580 send_fail_skb:
 581         kfree_skb(skb);
 582 send_fail:
 583         name = get_fc_host_event_code_name(event_code);
 584         printk(KERN_WARNING
 585                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
 586                 __func__, shost->host_no,
 587                 (name) ? name : "<unknown>", event_data, err);
 588         return;
 589 }
 590 EXPORT_SYMBOL(fc_host_post_event);
 591
 592
 593 /**
 594  * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
 595  * @shost:              host the event occurred on
 596  * @event_number:       fc event number obtained from get_fc_event_number()
 597  * @data_len:           amount, in bytes, of vendor unique data
 598  * @data_buf:           pointer to vendor unique data
 599  * @vendor_id:          Vendor id
 600  *
 601  * Notes:
 602  *      This routine assumes no locks are held on entry.
 603  */
 604 void
 605 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 606                 u32 data_len, char * data_buf, u64 vendor_id)
 607 {
 608         struct sk_buff *skb;
 609         struct nlmsghdr *nlh;
 610         struct fc_nl_event *event;
 611         u32 len;
 612         int err;
 613
 614         if (!scsi_nl_sock) {
 615                 err = -ENOENT;
 616                 goto send_vendor_fail;
 617         }
 618
 619         len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
 620
 621         skb = nlmsg_new(len, GFP_KERNEL);
 622         if (!skb) {
 623                 err = -ENOBUFS;
 624                 goto send_vendor_fail;
 625         }
 626
 627         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 628         if (!nlh) {
 629                 err = -ENOBUFS;
 630                 goto send_vendor_fail_skb;
 631         }
 632         event = nlmsg_data(nlh);
 633
 634         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 635                                 FC_NL_ASYNC_EVENT, len);
 636         event->seconds = get_seconds();
 637         event->vendor_id = vendor_id;
 638         event->host_no = shost->host_no;
 639         event->event_datalen = data_len;        /* bytes */
 640         event->event_num = event_number;
 641         event->event_code = FCH_EVT_VENDOR_UNIQUE;
 642         memcpy(&event->event_data, data_buf, data_len);
 643
 644         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 645                         GFP_KERNEL);
 646         return;
 647
 648 send_vendor_fail_skb:
 649         kfree_skb(skb);
 650 send_vendor_fail:
 651         printk(KERN_WARNING
 652                 "%s: Dropped Event : host %d vendor_unique - err %d\n",
 653                 __func__, shost->host_no, err);
 654         return;
 655 }
 656 EXPORT_SYMBOL(fc_host_post_vendor_event);
 657
 658
 659
 660 static __init int fc_transport_init(void)
 661 {
 662         int error;
 663
 664         atomic_set(&fc_event_seq, 0);
 665
 666         error = transport_class_register(&fc_host_class);
 667         if (error)
 668                 return error;
 669         error = transport_class_register(&fc_vport_class);
 670         if (error)
 671                 goto unreg_host_class;
 672         error = transport_class_register(&fc_rport_class);
 673         if (error)
 674                 goto unreg_vport_class;
 675         error = transport_class_register(&fc_transport_class);
 676         if (error)
 677                 goto unreg_rport_class;
 678         return 0;
 679
 680 unreg_rport_class:
 681         transport_class_unregister(&fc_rport_class);
 682 unreg_vport_class:
 683         transport_class_unregister(&fc_vport_class);
 684 unreg_host_class:
 685         transport_class_unregister(&fc_host_class);
 686         return error;
 687 }
 688
 689 static void __exit fc_transport_exit(void)
 690 {
 691         transport_class_unregister(&fc_transport_class);
 692         transport_class_unregister(&fc_rport_class);
 693         transport_class_unregister(&fc_host_class);
 694         transport_class_unregister(&fc_vport_class);
 695 }
 696
 697 /*
 698  * FC Remote Port Attribute Management
 699  */
 700
 701 #define fc_rport_show_function(field, format_string, sz, cast)          \
 702 static ssize_t                                                          \
 703 show_fc_rport_##field (struct device *dev,                              \
 704                        struct device_attribute *attr, char *buf)        \
 705 {                                                                       \
 706         struct fc_rport *rport = transport_class_to_rport(dev);         \
 707         struct Scsi_Host *shost = rport_to_shost(rport);                \
 708         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 709         if ((i->f->get_rport_##field) &&                                \
 710             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 711               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 712               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 713                 i->f->get_rport_##field(rport);                         \
 714         return snprintf(buf, sz, format_string, cast rport->field);     \
 715 }
 716
 717 #define fc_rport_store_function(field)                                  \
 718 static ssize_t                                                          \
 719 store_fc_rport_##field(struct device *dev,                              \
 720                        struct device_attribute *attr,                   \
 721                        const char *buf, size_t count)                   \
 722 {                                                                       \
 723         int val;                                                        \
 724         struct fc_rport *rport = transport_class_to_rport(dev);         \
 725         struct Scsi_Host *shost = rport_to_shost(rport);                \
 726         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 727         char *cp;                                                       \
 728         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
 729             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
 730             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
 731                 return -EBUSY;                                          \
 732         val = simple_strtoul(buf, &cp, 0);                              \
 733         if (*cp && (*cp != '\n'))                                       \
 734                 return -EINVAL;                                         \
 735         i->f->set_rport_##field(rport, val);                            \
 736         return count;                                                   \
 737 }
 738
 739 #define fc_rport_rd_attr(field, format_string, sz)                      \
 740         fc_rport_show_function(field, format_string, sz, )              \
 741 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 742                          show_fc_rport_##field, NULL)
 743
 744 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
 745         fc_rport_show_function(field, format_string, sz, (cast))        \
 746 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 747                           show_fc_rport_##field, NULL)
 748
 749 #define fc_rport_rw_attr(field, format_string, sz)                      \
 750         fc_rport_show_function(field, format_string, sz, )              \
 751         fc_rport_store_function(field)                                  \
 752 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
 753                         show_fc_rport_##field,                          \
 754                         store_fc_rport_##field)
 755
 756
 757 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
 758 static ssize_t                                                          \
 759 show_fc_rport_##field (struct device *dev,                              \
 760                        struct device_attribute *attr, char *buf)        \
 761 {                                                                       \
 762         struct fc_rport *rport = transport_class_to_rport(dev);         \
 763         return snprintf(buf, sz, format_string, cast rport->field);     \
 764 }
 765
 766 #define fc_private_rport_rd_attr(field, format_string, sz)              \
 767         fc_private_rport_show_function(field, format_string, sz, )      \
 768 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 769                          show_fc_rport_##field, NULL)
 770
 771 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
 772         fc_private_rport_show_function(field, format_string, sz, (cast)) \
 773 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 774                           show_fc_rport_##field, NULL)
 775
 776
 777 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
 778 static ssize_t                                                          \
 779 show_fc_rport_##title (struct device *dev,                              \
 780                        struct device_attribute *attr, char *buf)        \
 781 {                                                                       \
 782         struct fc_rport *rport = transport_class_to_rport(dev);         \
 783         const char *name;                                               \
 784         name = get_fc_##title##_name(rport->title);                     \
 785         if (!name)                                                      \
 786                 return -EINVAL;                                         \
 787         return snprintf(buf, maxlen, "%s\n", name);                     \
 788 }                                                                       \
 789 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
 790                         show_fc_rport_##title, NULL)
 791
 792
 793 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
 794         i->private_rport_attrs[count] = device_attr_rport_##field; \
 795         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 796         i->private_rport_attrs[count].store = NULL;                     \
 797         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 798         if (i->f->show_rport_##field)                                   \
 799                 count++
 800
 801 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
 802         i->private_rport_attrs[count] = device_attr_rport_##field; \
 803         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 804         i->private_rport_attrs[count].store = NULL;                     \
 805         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 806         count++
 807
 808 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
 809         i->private_rport_attrs[count] = device_attr_rport_##field; \
 810         if (!i->f->set_rport_##field) {                                 \
 811                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
 812                 i->private_rport_attrs[count].store = NULL;             \
 813         }                                                               \
 814         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 815         if (i->f->show_rport_##field)                                   \
 816                 count++
 817
 818 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
 819 {                                                                       \
 820         i->private_rport_attrs[count] = device_attr_rport_##field; \
 821         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 822         count++;                                                        \
 823 }
 824
 825
 826 /* The FC Transport Remote Port Attributes: */
 827
 828 /* Fixed Remote Port Attributes */
 829
 830 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
 831
 832 static ssize_t
 833 show_fc_rport_supported_classes (struct device *dev,
 834                                  struct device_attribute *attr, char *buf)
 835 {
 836         struct fc_rport *rport = transport_class_to_rport(dev);
 837         if (rport->supported_classes == FC_COS_UNSPECIFIED)
 838                 return snprintf(buf, 20, "unspecified\n");
 839         return get_fc_cos_names(rport->supported_classes, buf);
 840 }
 841 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
 842                 show_fc_rport_supported_classes, NULL);
 843
 844 /* Dynamic Remote Port Attributes */
 845
 846 /*
 847  * dev_loss_tmo attribute
 848  */
 849 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
 850 {
 851         char *cp;
 852
 853         *val = simple_strtoul(buf, &cp, 0);
 854         if (*cp && (*cp != '\n'))
 855                 return -EINVAL;
 856         /*
 857          * Check for overflow; dev_loss_tmo is u32
 858          */
 859         if (*val > UINT_MAX)
 860                 return -EINVAL;
 861
 862         return 0;
 863 }
 864
 865 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
 866                                      unsigned long val)
 867 {
 868         struct Scsi_Host *shost = rport_to_shost(rport);
 869         struct fc_internal *i = to_fc_internal(shost->transportt);
 870
 871         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 872             (rport->port_state == FC_PORTSTATE_DELETED) ||
 873             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 874                 return -EBUSY;
 875         /*
 876          * Check for overflow; dev_loss_tmo is u32
 877          */
 878         if (val > UINT_MAX)
 879                 return -EINVAL;
 880
 881         /*
 882          * If fast_io_fail is off we have to cap
 883          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
 884          */
 885         if (rport->fast_io_fail_tmo == -1 &&
 886             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
 887                 return -EINVAL;
 888
 889         i->f->set_rport_dev_loss_tmo(rport, val);
 890         return 0;
 891 }
 892
 893 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
 894 static ssize_t
 895 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 896                             const char *buf, size_t count)
 897 {
 898         struct fc_rport *rport = transport_class_to_rport(dev);
 899         unsigned long val;
 900         int rc;
 901
 902         rc = fc_str_to_dev_loss(buf, &val);
 903         if (rc)
 904                 return rc;
 905
 906         rc = fc_rport_set_dev_loss_tmo(rport, val);
 907         if (rc)
 908                 return rc;
 909         return count;
 910 }
 911 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
 912                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
 913
 914
 915 /* Private Remote Port Attributes */
 916
 917 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 918 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 919 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
 920
 921 static ssize_t
 922 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
 923                      char *buf)
 924 {
 925         struct fc_rport *rport = transport_class_to_rport(dev);
 926
 927         /* identify any roles that are port_id specific */
 928         if ((rport->port_id != -1) &&
 929             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
 930                                         FC_WELLKNOWN_PORTID_MASK) {
 931                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
 932                 case FC_FPORT_PORTID:
 933                         return snprintf(buf, 30, "Fabric Port\n");
 934                 case FC_FABCTLR_PORTID:
 935                         return snprintf(buf, 30, "Fabric Controller\n");
 936                 case FC_DIRSRVR_PORTID:
 937                         return snprintf(buf, 30, "Directory Server\n");
 938                 case FC_TIMESRVR_PORTID:
 939                         return snprintf(buf, 30, "Time Server\n");
 940                 case FC_MGMTSRVR_PORTID:
 941                         return snprintf(buf, 30, "Management Server\n");
 942                 default:
 943                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
 944                 }
 945         } else {
 946                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
 947                         return snprintf(buf, 20, "unknown\n");
 948                 return get_fc_port_roles_names(rport->roles, buf);
 949         }
 950 }
 951 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
 952                 show_fc_rport_roles, NULL);
 953
 954 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 955 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
 956
 957 /*
 958  * fast_io_fail_tmo attribute
 959  */
 960 static ssize_t
 961 show_fc_rport_fast_io_fail_tmo (struct device *dev,
 962                                 struct device_attribute *attr, char *buf)
 963 {
 964         struct fc_rport *rport = transport_class_to_rport(dev);
 965
 966         if (rport->fast_io_fail_tmo == -1)
 967                 return snprintf(buf, 5, "off\n");
 968         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
 969 }
 970
 971 static ssize_t
 972 store_fc_rport_fast_io_fail_tmo(struct device *dev,
 973                                 struct device_attribute *attr, const char *buf,
 974                                 size_t count)
 975 {
 976         int val;
 977         char *cp;
 978         struct fc_rport *rport = transport_class_to_rport(dev);
 979
 980         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 981             (rport->port_state == FC_PORTSTATE_DELETED) ||
 982             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 983                 return -EBUSY;
 984         if (strncmp(buf, "off", 3) == 0)
 985                 rport->fast_io_fail_tmo = -1;
 986         else {
 987                 val = simple_strtoul(buf, &cp, 0);
 988                 if ((*cp && (*cp != '\n')) || (val < 0))
 989                         return -EINVAL;
 990                 /*
 991                  * Cap fast_io_fail by dev_loss_tmo or
 992                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 993                  */
 994                 if ((val >= rport->dev_loss_tmo) ||
 995                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
 996                         return -EINVAL;
 997
 998                 rport->fast_io_fail_tmo = val;
 999         }
1000         return count;
1001 }
1002 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1003         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1004
1005
1006 /*
1007  * FC SCSI Target Attribute Management
1008  */
1009
1010 /*
1011  * Note: in the target show function we recognize when the remote
1012  *  port is in the hierarchy and do not allow the driver to get
1013  *  involved in sysfs functions. The driver only gets involved if
1014  *  it's the "old" style that doesn't use rports.
1015  */
1016 #define fc_starget_show_function(field, format_string, sz, cast)        \
1017 static ssize_t                                                          \
1018 show_fc_starget_##field (struct device *dev,                            \
1019                          struct device_attribute *attr, char *buf)      \
1020 {                                                                       \
1021         struct scsi_target *starget = transport_class_to_starget(dev);  \
1022         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1023         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1024         struct fc_rport *rport = starget_to_rport(starget);             \
1025         if (rport)                                                      \
1026                 fc_starget_##field(starget) = rport->field;             \
1027         else if (i->f->get_starget_##field)                             \
1028                 i->f->get_starget_##field(starget);                     \
1029         return snprintf(buf, sz, format_string,                         \
1030                 cast fc_starget_##field(starget));                      \
1031 }
1032
1033 #define fc_starget_rd_attr(field, format_string, sz)                    \
1034         fc_starget_show_function(field, format_string, sz, )            \
1035 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1036                          show_fc_starget_##field, NULL)
1037
1038 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1039         fc_starget_show_function(field, format_string, sz, (cast))      \
1040 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1041                           show_fc_starget_##field, NULL)
1042
1043 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1044         i->private_starget_attrs[count] = device_attr_starget_##field; \
1045         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1046         i->private_starget_attrs[count].store = NULL;                   \
1047         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1048         if (i->f->show_starget_##field)                                 \
1049                 count++
1050
1051 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1052         i->private_starget_attrs[count] = device_attr_starget_##field; \
1053         if (!i->f->set_starget_##field) {                               \
1054                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1055                 i->private_starget_attrs[count].store = NULL;           \
1056         }                                                               \
1057         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1058         if (i->f->show_starget_##field)                                 \
1059                 count++
1060
1061 /* The FC Transport SCSI Target Attributes: */
1062 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1063 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1064 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1065
1066
1067 /*
1068  * FC Virtual Port Attribute Management
1069  */
1070
1071 #define fc_vport_show_function(field, format_string, sz, cast)          \
1072 static ssize_t                                                          \
1073 show_fc_vport_##field (struct device *dev,                              \
1074                        struct device_attribute *attr, char *buf)        \
1075 {                                                                       \
1076         struct fc_vport *vport = transport_class_to_vport(dev);         \
1077         struct Scsi_Host *shost = vport_to_shost(vport);                \
1078         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1079         if ((i->f->get_vport_##field) &&                                \
1080             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1081                 i->f->get_vport_##field(vport);                         \
1082         return snprintf(buf, sz, format_string, cast vport->field);     \
1083 }
1084
1085 #define fc_vport_store_function(field)                                  \
1086 static ssize_t                                                          \
1087 store_fc_vport_##field(struct device *dev,                              \
1088                        struct device_attribute *attr,                   \
1089                        const char *buf, size_t count)                   \
1090 {                                                                       \
1091         int val;                                                        \
1092         struct fc_vport *vport = transport_class_to_vport(dev);         \
1093         struct Scsi_Host *shost = vport_to_shost(vport);                \
1094         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1095         char *cp;                                                       \
1096         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1097                 return -EBUSY;                                          \
1098         val = simple_strtoul(buf, &cp, 0);                              \
1099         if (*cp && (*cp != '\n'))                                       \
1100                 return -EINVAL;                                         \
1101         i->f->set_vport_##field(vport, val);                            \
1102         return count;                                                   \
1103 }
1104
1105 #define fc_vport_store_str_function(field, slen)                        \
1106 static ssize_t                                                          \
1107 store_fc_vport_##field(struct device *dev,                              \
1108                        struct device_attribute *attr,                   \
1109                        const char *buf, size_t count)                   \
1110 {                                                                       \
1111         struct fc_vport *vport = transport_class_to_vport(dev);         \
1112         struct Scsi_Host *shost = vport_to_shost(vport);                \
1113         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1114         unsigned int cnt=count;                                         \
1115                                                                         \
1116         /* count may include a LF at end of string */                   \
1117         if (buf[cnt-1] == '\n')                                         \
1118                 cnt--;                                                  \
1119         if (cnt > ((slen) - 1))                                         \
1120                 return -EINVAL;                                         \
1121         memcpy(vport->field, buf, cnt);                                 \
1122         i->f->set_vport_##field(vport);                                 \
1123         return count;                                                   \
1124 }
1125
1126 #define fc_vport_rd_attr(field, format_string, sz)                      \
1127         fc_vport_show_function(field, format_string, sz, )              \
1128 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1129                          show_fc_vport_##field, NULL)
1130
1131 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1132         fc_vport_show_function(field, format_string, sz, (cast))        \
1133 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1134                           show_fc_vport_##field, NULL)
1135
1136 #define fc_vport_rw_attr(field, format_string, sz)                      \
1137         fc_vport_show_function(field, format_string, sz, )              \
1138         fc_vport_store_function(field)                                  \
1139 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1140                         show_fc_vport_##field,                          \
1141                         store_fc_vport_##field)
1142
1143 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1144 static ssize_t                                                          \
1145 show_fc_vport_##field (struct device *dev,                              \
1146                        struct device_attribute *attr, char *buf)        \
1147 {                                                                       \
1148         struct fc_vport *vport = transport_class_to_vport(dev);         \
1149         return snprintf(buf, sz, format_string, cast vport->field);     \
1150 }
1151
1152 #define fc_private_vport_store_u32_function(field)                      \
1153 static ssize_t                                                          \
1154 store_fc_vport_##field(struct device *dev,                              \
1155                        struct device_attribute *attr,                   \
1156                        const char *buf, size_t count)                   \
1157 {                                                                       \
1158         u32 val;                                                        \
1159         struct fc_vport *vport = transport_class_to_vport(dev);         \
1160         char *cp;                                                       \
1161         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1162                 return -EBUSY;                                          \
1163         val = simple_strtoul(buf, &cp, 0);                              \
1164         if (*cp && (*cp != '\n'))                                       \
1165                 return -EINVAL;                                         \
1166         vport->field = val;                                             \
1167         return count;                                                   \
1168 }
1169
1170
1171 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1172         fc_private_vport_show_function(field, format_string, sz, )      \
1173 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1174                          show_fc_vport_##field, NULL)
1175
1176 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1177         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1178 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1179                           show_fc_vport_##field, NULL)
1180
1181 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1182         fc_private_vport_show_function(field, format_string, sz, )      \
1183         fc_private_vport_store_u32_function(field)                      \
1184 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1185                         show_fc_vport_##field,                          \
1186                         store_fc_vport_##field)
1187
1188
1189 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1190 static ssize_t                                                          \
1191 show_fc_vport_##title (struct device *dev,                              \
1192                        struct device_attribute *attr,                   \
1193                        char *buf)                                       \
1194 {                                                                       \
1195         struct fc_vport *vport = transport_class_to_vport(dev);         \
1196         const char *name;                                               \
1197         name = get_fc_##title##_name(vport->title);                     \
1198         if (!name)                                                      \
1199                 return -EINVAL;                                         \
1200         return snprintf(buf, maxlen, "%s\n", name);                     \
1201 }                                                                       \
1202 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1203                         show_fc_vport_##title, NULL)
1204
1205
1206 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1207         i->private_vport_attrs[count] = device_attr_vport_##field; \
1208         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1209         i->private_vport_attrs[count].store = NULL;                     \
1210         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1211         if (i->f->get_##field)                                          \
1212                 count++
1213         /* NOTE: Above MACRO differs: checks function not show bit */
1214
1215 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1216         i->private_vport_attrs[count] = device_attr_vport_##field; \
1217         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1218         i->private_vport_attrs[count].store = NULL;                     \
1219         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1220         count++
1221
1222 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1223         i->private_vport_attrs[count] = device_attr_vport_##field; \
1224         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1225         if (i->f->field)                                                \
1226                 count++
1227         /* NOTE: Above MACRO differs: checks function */
1228
1229 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1230         i->private_vport_attrs[count] = device_attr_vport_##field; \
1231         if (!i->f->set_vport_##field) {                                 \
1232                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1233                 i->private_vport_attrs[count].store = NULL;             \
1234         }                                                               \
1235         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1236         count++
1237         /* NOTE: Above MACRO differs: does not check show bit */
1238
1239 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1240 {                                                                       \
1241         i->private_vport_attrs[count] = device_attr_vport_##field; \
1242         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1243         count++;                                                        \
1244 }
1245
1246
1247 /* The FC Transport Virtual Port Attributes: */
1248
1249 /* Fixed Virtual Port Attributes */
1250
1251 /* Dynamic Virtual Port Attributes */
1252
1253 /* Private Virtual Port Attributes */
1254
1255 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1256 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1257 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1258 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1259
1260 static ssize_t
1261 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1262                      char *buf)
1263 {
1264         struct fc_vport *vport = transport_class_to_vport(dev);
1265
1266         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1267                 return snprintf(buf, 20, "unknown\n");
1268         return get_fc_port_roles_names(vport->roles, buf);
1269 }
1270 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1271
1272 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1273
1274 fc_private_vport_show_function(symbolic_name, "%s\n",
1275                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1276 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1277 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1278                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1279
1280 static ssize_t
1281 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1282                       const char *buf, size_t count)
1283 {
1284         struct fc_vport *vport = transport_class_to_vport(dev);
1285         struct Scsi_Host *shost = vport_to_shost(vport);
1286         unsigned long flags;
1287
1288         spin_lock_irqsave(shost->host_lock, flags);
1289         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1290                 spin_unlock_irqrestore(shost->host_lock, flags);
1291                 return -EBUSY;
1292         }
1293         vport->flags |= FC_VPORT_DELETING;
1294         spin_unlock_irqrestore(shost->host_lock, flags);
1295
1296         fc_queue_work(shost, &vport->vport_delete_work);
1297         return count;
1298 }
1299 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1300                         NULL, store_fc_vport_delete);
1301
1302
1303 /*
1304  * Enable/Disable vport
1305  *  Write "1" to disable, write "0" to enable
1306  */
1307 static ssize_t
1308 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1309                        const char *buf,
1310                            size_t count)
1311 {
1312         struct fc_vport *vport = transport_class_to_vport(dev);
1313         struct Scsi_Host *shost = vport_to_shost(vport);
1314         struct fc_internal *i = to_fc_internal(shost->transportt);
1315         int stat;
1316
1317         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1318                 return -EBUSY;
1319
1320         if (*buf == '0') {
1321                 if (vport->vport_state != FC_VPORT_DISABLED)
1322                         return -EALREADY;
1323         } else if (*buf == '1') {
1324                 if (vport->vport_state == FC_VPORT_DISABLED)
1325                         return -EALREADY;
1326         } else
1327                 return -EINVAL;
1328
1329         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1330         return stat ? stat : count;
1331 }
1332 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1333                         NULL, store_fc_vport_disable);
1334
1335
1336 /*
1337  * Host Attribute Management
1338  */
1339
1340 #define fc_host_show_function(field, format_string, sz, cast)           \
1341 static ssize_t                                                          \
1342 show_fc_host_##field (struct device *dev,                               \
1343                       struct device_attribute *attr, char *buf)         \
1344 {                                                                       \
1345         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1346         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1347         if (i->f->get_host_##field)                                     \
1348                 i->f->get_host_##field(shost);                          \
1349         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1350 }
1351
1352 #define fc_host_store_function(field)                                   \
1353 static ssize_t                                                          \
1354 store_fc_host_##field(struct device *dev,                               \
1355                       struct device_attribute *attr,                    \
1356                       const char *buf,  size_t count)                   \
1357 {                                                                       \
1358         int val;                                                        \
1359         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1360         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1361         char *cp;                                                       \
1362                                                                         \
1363         val = simple_strtoul(buf, &cp, 0);                              \
1364         if (*cp && (*cp != '\n'))                                       \
1365                 return -EINVAL;                                         \
1366         i->f->set_host_##field(shost, val);                             \
1367         return count;                                                   \
1368 }
1369
1370 #define fc_host_store_str_function(field, slen)                         \
1371 static ssize_t                                                          \
1372 store_fc_host_##field(struct device *dev,                               \
1373                       struct device_attribute *attr,                    \
1374                       const char *buf, size_t count)                    \
1375 {                                                                       \
1376         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1377         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1378         unsigned int cnt=count;                                         \
1379                                                                         \
1380         /* count may include a LF at end of string */                   \
1381         if (buf[cnt-1] == '\n')                                         \
1382                 cnt--;                                                  \
1383         if (cnt > ((slen) - 1))                                         \
1384                 return -EINVAL;                                         \
1385         memcpy(fc_host_##field(shost), buf, cnt);                       \
1386         i->f->set_host_##field(shost);                                  \
1387         return count;                                                   \
1388 }
1389
1390 #define fc_host_rd_attr(field, format_string, sz)                       \
1391         fc_host_show_function(field, format_string, sz, )               \
1392 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1393                          show_fc_host_##field, NULL)
1394
1395 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1396         fc_host_show_function(field, format_string, sz, (cast))         \
1397 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1398                           show_fc_host_##field, NULL)
1399
1400 #define fc_host_rw_attr(field, format_string, sz)                       \
1401         fc_host_show_function(field, format_string, sz, )               \
1402         fc_host_store_function(field)                                   \
1403 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1404                         show_fc_host_##field,                           \
1405                         store_fc_host_##field)
1406
1407 #define fc_host_rd_enum_attr(title, maxlen)                             \
1408 static ssize_t                                                          \
1409 show_fc_host_##title (struct device *dev,                               \
1410                       struct device_attribute *attr, char *buf)         \
1411 {                                                                       \
1412         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1413         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1414         const char *name;                                               \
1415         if (i->f->get_host_##title)                                     \
1416                 i->f->get_host_##title(shost);                          \
1417         name = get_fc_##title##_name(fc_host_##title(shost));           \
1418         if (!name)                                                      \
1419                 return -EINVAL;                                         \
1420         return snprintf(buf, maxlen, "%s\n", name);                     \
1421 }                                                                       \
1422 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1423
1424 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1425         i->private_host_attrs[count] = device_attr_host_##field;        \
1426         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1427         i->private_host_attrs[count].store = NULL;                      \
1428         i->host_attrs[count] = &i->private_host_attrs[count];           \
1429         if (i->f->show_host_##field)                                    \
1430                 count++
1431
1432 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1433         i->private_host_attrs[count] = device_attr_host_##field;        \
1434         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1435         i->private_host_attrs[count].store = NULL;                      \
1436         i->host_attrs[count] = &i->private_host_attrs[count];           \
1437         count++
1438
1439 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1440         i->private_host_attrs[count] = device_attr_host_##field;        \
1441         if (!i->f->set_host_##field) {                                  \
1442                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1443                 i->private_host_attrs[count].store = NULL;              \
1444         }                                                               \
1445         i->host_attrs[count] = &i->private_host_attrs[count];           \
1446         if (i->f->show_host_##field)                                    \
1447                 count++
1448
1449
1450 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1451 static ssize_t                                                          \
1452 show_fc_host_##field (struct device *dev,                               \
1453                       struct device_attribute *attr, char *buf)         \
1454 {                                                                       \
1455         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1456         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1457 }
1458
1459 #define fc_private_host_rd_attr(field, format_string, sz)               \
1460         fc_private_host_show_function(field, format_string, sz, )       \
1461 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1462                          show_fc_host_##field, NULL)
1463
1464 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1465         fc_private_host_show_function(field, format_string, sz, (cast)) \
1466 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1467                           show_fc_host_##field, NULL)
1468
1469 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1470         i->private_host_attrs[count] = device_attr_host_##field;        \
1471         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1472         i->private_host_attrs[count].store = NULL;                      \
1473         i->host_attrs[count] = &i->private_host_attrs[count];           \
1474         count++
1475
1476 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1477 {                                                                       \
1478         i->private_host_attrs[count] = device_attr_host_##field;        \
1479         i->host_attrs[count] = &i->private_host_attrs[count];           \
1480         count++;                                                        \
1481 }
1482
1483
1484 /* Fixed Host Attributes */
1485
1486 static ssize_t
1487 show_fc_host_supported_classes (struct device *dev,
1488                                 struct device_attribute *attr, char *buf)
1489 {
1490         struct Scsi_Host *shost = transport_class_to_shost(dev);
1491
1492         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1493                 return snprintf(buf, 20, "unspecified\n");
1494
1495         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1496 }
1497 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1498                 show_fc_host_supported_classes, NULL);
1499
1500 static ssize_t
1501 show_fc_host_supported_fc4s (struct device *dev,
1502                              struct device_attribute *attr, char *buf)
1503 {
1504         struct Scsi_Host *shost = transport_class_to_shost(dev);
1505         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1506 }
1507 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1508                 show_fc_host_supported_fc4s, NULL);
1509
1510 static ssize_t
1511 show_fc_host_supported_speeds (struct device *dev,
1512                                struct device_attribute *attr, char *buf)
1513 {
1514         struct Scsi_Host *shost = transport_class_to_shost(dev);
1515
1516         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1517                 return snprintf(buf, 20, "unknown\n");
1518
1519         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1520 }
1521 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1522                 show_fc_host_supported_speeds, NULL);
1523
1524
1525 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1526 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1527 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1528                              unsigned long long);
1529 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1530 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1531 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1532 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1533 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1534 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1535 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1537 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1538 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1539
1540
1541 /* Dynamic Host Attributes */
1542
1543 static ssize_t
1544 show_fc_host_active_fc4s (struct device *dev,
1545                           struct device_attribute *attr, char *buf)
1546 {
1547         struct Scsi_Host *shost = transport_class_to_shost(dev);
1548         struct fc_internal *i = to_fc_internal(shost->transportt);
1549
1550         if (i->f->get_host_active_fc4s)
1551                 i->f->get_host_active_fc4s(shost);
1552
1553         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1554 }
1555 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1556                 show_fc_host_active_fc4s, NULL);
1557
1558 static ssize_t
1559 show_fc_host_speed (struct device *dev,
1560                     struct device_attribute *attr, char *buf)
1561 {
1562         struct Scsi_Host *shost = transport_class_to_shost(dev);
1563         struct fc_internal *i = to_fc_internal(shost->transportt);
1564
1565         if (i->f->get_host_speed)
1566                 i->f->get_host_speed(shost);
1567
1568         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1569                 return snprintf(buf, 20, "unknown\n");
1570
1571         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1572 }
1573 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1574                 show_fc_host_speed, NULL);
1575
1576
1577 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1578 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1579 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1580 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1581 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1582
1583 fc_private_host_show_function(system_hostname, "%s\n",
1584                 FC_SYMBOLIC_NAME_SIZE + 1, )
1585 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1586 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1587                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1588
1589
1590 /* Private Host Attributes */
1591
1592 static ssize_t
1593 show_fc_private_host_tgtid_bind_type(struct device *dev,
1594                                      struct device_attribute *attr, char *buf)
1595 {
1596         struct Scsi_Host *shost = transport_class_to_shost(dev);
1597         const char *name;
1598
1599         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1600         if (!name)
1601                 return -EINVAL;
1602         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1603 }
1604
1605 #define get_list_head_entry(pos, head, member)          \
1606         pos = list_entry((head)->next, typeof(*pos), member)
1607
1608 static ssize_t
1609 store_fc_private_host_tgtid_bind_type(struct device *dev,
1610         struct device_attribute *attr, const char *buf, size_t count)
1611 {
1612         struct Scsi_Host *shost = transport_class_to_shost(dev);
1613         struct fc_rport *rport;
1614         enum fc_tgtid_binding_type val;
1615         unsigned long flags;
1616
1617         if (get_fc_tgtid_bind_type_match(buf, &val))
1618                 return -EINVAL;
1619
1620         /* if changing bind type, purge all unused consistent bindings */
1621         if (val != fc_host_tgtid_bind_type(shost)) {
1622                 spin_lock_irqsave(shost->host_lock, flags);
1623                 while (!list_empty(&fc_host_rport_bindings(shost))) {
1624                         get_list_head_entry(rport,
1625                                 &fc_host_rport_bindings(shost), peers);
1626                         list_del(&rport->peers);
1627                         rport->port_state = FC_PORTSTATE_DELETED;
1628                         fc_queue_work(shost, &rport->rport_delete_work);
1629                 }
1630                 spin_unlock_irqrestore(shost->host_lock, flags);
1631         }
1632
1633         fc_host_tgtid_bind_type(shost) = val;
1634         return count;
1635 }
1636
1637 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1638                         show_fc_private_host_tgtid_bind_type,
1639                         store_fc_private_host_tgtid_bind_type);
1640
1641 static ssize_t
1642 store_fc_private_host_issue_lip(struct device *dev,
1643         struct device_attribute *attr, const char *buf, size_t count)
1644 {
1645         struct Scsi_Host *shost = transport_class_to_shost(dev);
1646         struct fc_internal *i = to_fc_internal(shost->transportt);
1647         int ret;
1648
1649         /* ignore any data value written to the attribute */
1650         if (i->f->issue_fc_host_lip) {
1651                 ret = i->f->issue_fc_host_lip(shost);
1652                 return ret ? ret: count;
1653         }
1654
1655         return -ENOENT;
1656 }
1657
1658 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1659                         store_fc_private_host_issue_lip);
1660
1661 static ssize_t
1662 store_fc_private_host_dev_loss_tmo(struct device *dev,
1663                                    struct device_attribute *attr,
1664                                    const char *buf, size_t count)
1665 {
1666         struct Scsi_Host *shost = transport_class_to_shost(dev);
1667         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1668         struct fc_rport *rport;
1669         unsigned long val, flags;
1670         int rc;
1671
1672         rc = fc_str_to_dev_loss(buf, &val);
1673         if (rc)
1674                 return rc;
1675
1676         fc_host_dev_loss_tmo(shost) = val;
1677         spin_lock_irqsave(shost->host_lock, flags);
1678         list_for_each_entry(rport, &fc_host->rports, peers)
1679                 fc_rport_set_dev_loss_tmo(rport, val);
1680         spin_unlock_irqrestore(shost->host_lock, flags);
1681         return count;
1682 }
1683
1684 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1685 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1686                       show_fc_host_dev_loss_tmo,
1687                       store_fc_private_host_dev_loss_tmo);
1688
1689 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1690
1691 /*
1692  * Host Statistics Management
1693  */
1694
1695 /* Show a given attribute in the statistics group */
1696 static ssize_t
1697 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1698 {
1699         struct Scsi_Host *shost = transport_class_to_shost(dev);
1700         struct fc_internal *i = to_fc_internal(shost->transportt);
1701         struct fc_host_statistics *stats;
1702         ssize_t ret = -ENOENT;
1703
1704         if (offset > sizeof(struct fc_host_statistics) ||
1705             offset % sizeof(u64) != 0)
1706                 WARN_ON(1);
1707
1708         if (i->f->get_fc_host_stats) {
1709                 stats = (i->f->get_fc_host_stats)(shost);
1710                 if (stats)
1711                         ret = snprintf(buf, 20, "0x%llx\n",
1712                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1713         }
1714         return ret;
1715 }
1716
1717
1718 /* generate a read-only statistics attribute */
1719 #define fc_host_statistic(name)                                         \
1720 static ssize_t show_fcstat_##name(struct device *cd,                    \
1721                                   struct device_attribute *attr,        \
1722                                   char *buf)                            \
1723 {                                                                       \
1724         return fc_stat_show(cd, buf,                                    \
1725                             offsetof(struct fc_host_statistics, name)); \
1726 }                                                                       \
1727 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1728
1729 fc_host_statistic(seconds_since_last_reset);
1730 fc_host_statistic(tx_frames);
1731 fc_host_statistic(tx_words);
1732 fc_host_statistic(rx_frames);
1733 fc_host_statistic(rx_words);
1734 fc_host_statistic(lip_count);
1735 fc_host_statistic(nos_count);
1736 fc_host_statistic(error_frames);
1737 fc_host_statistic(dumped_frames);
1738 fc_host_statistic(link_failure_count);
1739 fc_host_statistic(loss_of_sync_count);
1740 fc_host_statistic(loss_of_signal_count);
1741 fc_host_statistic(prim_seq_protocol_err_count);
1742 fc_host_statistic(invalid_tx_word_count);
1743 fc_host_statistic(invalid_crc_count);
1744 fc_host_statistic(fcp_input_requests);
1745 fc_host_statistic(fcp_output_requests);
1746 fc_host_statistic(fcp_control_requests);
1747 fc_host_statistic(fcp_input_megabytes);
1748 fc_host_statistic(fcp_output_megabytes);
1749 fc_host_statistic(fcp_packet_alloc_failures);
1750 fc_host_statistic(fcp_packet_aborts);
1751 fc_host_statistic(fcp_frame_alloc_failures);
1752 fc_host_statistic(fc_no_free_exch);
1753 fc_host_statistic(fc_no_free_exch_xid);
1754 fc_host_statistic(fc_xid_not_found);
1755 fc_host_statistic(fc_xid_busy);
1756 fc_host_statistic(fc_seq_not_found);
1757 fc_host_statistic(fc_non_bls_resp);
1758
1759 static ssize_t
1760 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1761                     const char *buf, size_t count)
1762 {
1763         struct Scsi_Host *shost = transport_class_to_shost(dev);
1764         struct fc_internal *i = to_fc_internal(shost->transportt);
1765
1766         /* ignore any data value written to the attribute */
1767         if (i->f->reset_fc_host_stats) {
1768                 i->f->reset_fc_host_stats(shost);
1769                 return count;
1770         }
1771
1772         return -ENOENT;
1773 }
1774 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1775                                 fc_reset_statistics);
1776
1777 static struct attribute *fc_statistics_attrs[] = {
1778         &device_attr_host_seconds_since_last_reset.attr,
1779         &device_attr_host_tx_frames.attr,
1780         &device_attr_host_tx_words.attr,
1781         &device_attr_host_rx_frames.attr,
1782         &device_attr_host_rx_words.attr,
1783         &device_attr_host_lip_count.attr,
1784         &device_attr_host_nos_count.attr,
1785         &device_attr_host_error_frames.attr,
1786         &device_attr_host_dumped_frames.attr,
1787         &device_attr_host_link_failure_count.attr,
1788         &device_attr_host_loss_of_sync_count.attr,
1789         &device_attr_host_loss_of_signal_count.attr,
1790         &device_attr_host_prim_seq_protocol_err_count.attr,
1791         &device_attr_host_invalid_tx_word_count.attr,
1792         &device_attr_host_invalid_crc_count.attr,
1793         &device_attr_host_fcp_input_requests.attr,
1794         &device_attr_host_fcp_output_requests.attr,
1795         &device_attr_host_fcp_control_requests.attr,
1796         &device_attr_host_fcp_input_megabytes.attr,
1797         &device_attr_host_fcp_output_megabytes.attr,
1798         &device_attr_host_fcp_packet_alloc_failures.attr,
1799         &device_attr_host_fcp_packet_aborts.attr,
1800         &device_attr_host_fcp_frame_alloc_failures.attr,
1801         &device_attr_host_fc_no_free_exch.attr,
1802         &device_attr_host_fc_no_free_exch_xid.attr,
1803         &device_attr_host_fc_xid_not_found.attr,
1804         &device_attr_host_fc_xid_busy.attr,
1805         &device_attr_host_fc_seq_not_found.attr,
1806         &device_attr_host_fc_non_bls_resp.attr,
1807         &device_attr_host_reset_statistics.attr,
1808         NULL
1809 };
1810
1811 static struct attribute_group fc_statistics_group = {
1812         .name = "statistics",
1813         .attrs = fc_statistics_attrs,
1814 };
1815
1816
1817 /* Host Vport Attributes */
1818
1819 static int
1820 fc_parse_wwn(const char *ns, u64 *nm)
1821 {
1822         unsigned int i, j;
1823         u8 wwn[8];
1824
1825         memset(wwn, 0, sizeof(wwn));
1826
1827         /* Validate and store the new name */
1828         for (i=0, j=0; i < 16; i++) {
1829                 int value;
1830
1831                 value = hex_to_bin(*ns++);
1832                 if (value >= 0)
1833                         j = (j << 4) | value;
1834                 else
1835                         return -EINVAL;
1836                 if (i % 2) {
1837                         wwn[i/2] = j & 0xff;
1838                         j = 0;
1839                 }
1840         }
1841
1842         *nm = wwn_to_u64(wwn);
1843
1844         return 0;
1845 }
1846
1847
1848 /*
1849  * "Short-cut" sysfs variable to create a new vport on a FC Host.
1850  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1851  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1852  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1853  */
1854 static ssize_t
1855 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1856                            const char *buf, size_t count)
1857 {
1858         struct Scsi_Host *shost = transport_class_to_shost(dev);
1859         struct fc_vport_identifiers vid;
1860         struct fc_vport *vport;
1861         unsigned int cnt=count;
1862         int stat;
1863
1864         memset(&vid, 0, sizeof(vid));
1865
1866         /* count may include a LF at end of string */
1867         if (buf[cnt-1] == '\n')
1868                 cnt--;
1869
1870         /* validate we have enough characters for WWPN */
1871         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1872                 return -EINVAL;
1873
1874         stat = fc_parse_wwn(&buf[0], &vid.port_name);
1875         if (stat)
1876                 return stat;
1877
1878         stat = fc_parse_wwn(&buf[17], &vid.node_name);
1879         if (stat)
1880                 return stat;
1881
1882         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1883         vid.vport_type = FC_PORTTYPE_NPIV;
1884         /* vid.symbolic_name is already zero/NULL's */
1885         vid.disable = false;            /* always enabled */
1886
1887         /* we only allow support on Channel 0 !!! */
1888         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1889         return stat ? stat : count;
1890 }
1891 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1892                         store_fc_host_vport_create);
1893
1894
1895 /*
1896  * "Short-cut" sysfs variable to delete a vport on a FC Host.
1897  * Vport is identified by a string containing "<WWPN>:<WWNN>".
1898  * The WWNs are specified as hex characters, and may *not* contain
1899  * any prefixes (e.g. 0x, x, etc)
1900  */
1901 static ssize_t
1902 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1903                            const char *buf, size_t count)
1904 {
1905         struct Scsi_Host *shost = transport_class_to_shost(dev);
1906         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1907         struct fc_vport *vport;
1908         u64 wwpn, wwnn;
1909         unsigned long flags;
1910         unsigned int cnt=count;
1911         int stat, match;
1912
1913         /* count may include a LF at end of string */
1914         if (buf[cnt-1] == '\n')
1915                 cnt--;
1916
1917         /* validate we have enough characters for WWPN */
1918         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1919                 return -EINVAL;
1920
1921         stat = fc_parse_wwn(&buf[0], &wwpn);
1922         if (stat)
1923                 return stat;
1924
1925         stat = fc_parse_wwn(&buf[17], &wwnn);
1926         if (stat)
1927                 return stat;
1928
1929         spin_lock_irqsave(shost->host_lock, flags);
1930         match = 0;
1931         /* we only allow support on Channel 0 !!! */
1932         list_for_each_entry(vport, &fc_host->vports, peers) {
1933                 if ((vport->channel == 0) &&
1934                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1935                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1936                                 break;
1937                         vport->flags |= FC_VPORT_DELETING;
1938                         match = 1;
1939                         break;
1940                 }
1941         }
1942         spin_unlock_irqrestore(shost->host_lock, flags);
1943
1944         if (!match)
1945                 return -ENODEV;
1946
1947         stat = fc_vport_terminate(vport);
1948         return stat ? stat : count;
1949 }
1950 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1951                         store_fc_host_vport_delete);
1952
1953
1954 static int fc_host_match(struct attribute_container *cont,
1955                           struct device *dev)
1956 {
1957         struct Scsi_Host *shost;
1958         struct fc_internal *i;
1959
1960         if (!scsi_is_host_device(dev))
1961                 return 0;
1962
1963         shost = dev_to_shost(dev);
1964         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1965             != &fc_host_class.class)
1966                 return 0;
1967
1968         i = to_fc_internal(shost->transportt);
1969
1970         return &i->t.host_attrs.ac == cont;
1971 }
1972
1973 static int fc_target_match(struct attribute_container *cont,
1974                             struct device *dev)
1975 {
1976         struct Scsi_Host *shost;
1977         struct fc_internal *i;
1978
1979         if (!scsi_is_target_device(dev))
1980                 return 0;
1981
1982         shost = dev_to_shost(dev->parent);
1983         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1984             != &fc_host_class.class)
1985                 return 0;
1986
1987         i = to_fc_internal(shost->transportt);
1988
1989         return &i->t.target_attrs.ac == cont;
1990 }
1991
1992 static void fc_rport_dev_release(struct device *dev)
1993 {
1994         struct fc_rport *rport = dev_to_rport(dev);
1995         put_device(dev->parent);
1996         kfree(rport);
1997 }
1998
1999 int scsi_is_fc_rport(const struct device *dev)
2000 {
2001         return dev->release == fc_rport_dev_release;
2002 }
2003 EXPORT_SYMBOL(scsi_is_fc_rport);
2004
2005 static int fc_rport_match(struct attribute_container *cont,
2006                             struct device *dev)
2007 {
2008         struct Scsi_Host *shost;
2009         struct fc_internal *i;
2010
2011         if (!scsi_is_fc_rport(dev))
2012                 return 0;
2013
2014         shost = dev_to_shost(dev->parent);
2015         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2016             != &fc_host_class.class)
2017                 return 0;
2018
2019         i = to_fc_internal(shost->transportt);
2020
2021         return &i->rport_attr_cont.ac == cont;
2022 }
2023
2024
2025 static void fc_vport_dev_release(struct device *dev)
2026 {
2027         struct fc_vport *vport = dev_to_vport(dev);
2028         put_device(dev->parent);                /* release kobj parent */
2029         kfree(vport);
2030 }
2031
2032 static int scsi_is_fc_vport(const struct device *dev)
2033 {
2034         return dev->release == fc_vport_dev_release;
2035 }
2036
2037 static int fc_vport_match(struct attribute_container *cont,
2038                             struct device *dev)
2039 {
2040         struct fc_vport *vport;
2041         struct Scsi_Host *shost;
2042         struct fc_internal *i;
2043
2044         if (!scsi_is_fc_vport(dev))
2045                 return 0;
2046         vport = dev_to_vport(dev);
2047
2048         shost = vport_to_shost(vport);
2049         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2050             != &fc_host_class.class)
2051                 return 0;
2052
2053         i = to_fc_internal(shost->transportt);
2054         return &i->vport_attr_cont.ac == cont;
2055 }
2056
2057
2058 /**
2059  * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2060  * @scmd:       The SCSI command which timed out
2061  *
2062  * This routine protects against error handlers getting invoked while a
2063  * rport is in a blocked state, typically due to a temporarily loss of
2064  * connectivity. If the error handlers are allowed to proceed, requests
2065  * to abort i/o, reset the target, etc will likely fail as there is no way
2066  * to communicate with the device to perform the requested function. These
2067  * failures may result in the midlayer taking the device offline, requiring
2068  * manual intervention to restore operation.
2069  *
2070  * This routine, called whenever an i/o times out, validates the state of
2071  * the underlying rport. If the rport is blocked, it returns
2072  * EH_RESET_TIMER, which will continue to reschedule the timeout.
2073  * Eventually, either the device will return, or devloss_tmo will fire,
2074  * and when the timeout then fires, it will be handled normally.
2075  * If the rport is not blocked, normal error handling continues.
2076  *
2077  * Notes:
2078  *      This routine assumes no locks are held on entry.
2079  */
2080 enum blk_eh_timer_return
2081 fc_eh_timed_out(struct scsi_cmnd *scmd)
2082 {
2083         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2084
2085         if (rport->port_state == FC_PORTSTATE_BLOCKED)
2086                 return BLK_EH_RESET_TIMER;
2087
2088         return BLK_EH_NOT_HANDLED;
2089 }
2090 EXPORT_SYMBOL(fc_eh_timed_out);
2091
2092 /*
2093  * Called by fc_user_scan to locate an rport on the shost that
2094  * matches the channel and target id, and invoke scsi_scan_target()
2095  * on the rport.
2096  */
2097 static void
2098 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2099 {
2100         struct fc_rport *rport;
2101         unsigned long flags;
2102
2103         spin_lock_irqsave(shost->host_lock, flags);
2104
2105         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2106                 if (rport->scsi_target_id == -1)
2107                         continue;
2108
2109                 if (rport->port_state != FC_PORTSTATE_ONLINE)
2110                         continue;
2111
2112                 if ((channel == rport->channel) &&
2113                     (id == rport->scsi_target_id)) {
2114                         spin_unlock_irqrestore(shost->host_lock, flags);
2115                         scsi_scan_target(&rport->dev, channel, id, lun,
2116                                          SCSI_SCAN_MANUAL);
2117                         return;
2118                 }
2119         }
2120
2121         spin_unlock_irqrestore(shost->host_lock, flags);
2122 }
2123
2124 /*
2125  * Called via sysfs scan routines. Necessary, as the FC transport
2126  * wants to place all target objects below the rport object. So this
2127  * routine must invoke the scsi_scan_target() routine with the rport
2128  * object as the parent.
2129  */
2130 static int
2131 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2132 {
2133         uint chlo, chhi;
2134         uint tgtlo, tgthi;
2135
2136         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2137             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2138             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2139                 return -EINVAL;
2140
2141         if (channel == SCAN_WILD_CARD) {
2142                 chlo = 0;
2143                 chhi = shost->max_channel + 1;
2144         } else {
2145                 chlo = channel;
2146                 chhi = channel + 1;
2147         }
2148
2149         if (id == SCAN_WILD_CARD) {
2150                 tgtlo = 0;
2151                 tgthi = shost->max_id;
2152         } else {
2153                 tgtlo = id;
2154                 tgthi = id + 1;
2155         }
2156
2157         for ( ; chlo < chhi; chlo++)
2158                 for ( ; tgtlo < tgthi; tgtlo++)
2159                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2160
2161         return 0;
2162 }
2163
2164 struct scsi_transport_template *
2165 fc_attach_transport(struct fc_function_template *ft)
2166 {
2167         int count;
2168         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2169                                         GFP_KERNEL);
2170
2171         if (unlikely(!i))
2172                 return NULL;
2173
2174         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2175         i->t.target_attrs.ac.class = &fc_transport_class.class;
2176         i->t.target_attrs.ac.match = fc_target_match;
2177         i->t.target_size = sizeof(struct fc_starget_attrs);
2178         transport_container_register(&i->t.target_attrs);
2179
2180         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2181         i->t.host_attrs.ac.class = &fc_host_class.class;
2182         i->t.host_attrs.ac.match = fc_host_match;
2183         i->t.host_size = sizeof(struct fc_host_attrs);
2184         if (ft->get_fc_host_stats)
2185                 i->t.host_attrs.statistics = &fc_statistics_group;
2186         transport_container_register(&i->t.host_attrs);
2187
2188         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2189         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2190         i->rport_attr_cont.ac.match = fc_rport_match;
2191         transport_container_register(&i->rport_attr_cont);
2192
2193         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2194         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2195         i->vport_attr_cont.ac.match = fc_vport_match;
2196         transport_container_register(&i->vport_attr_cont);
2197
2198         i->f = ft;
2199
2200         /* Transport uses the shost workq for scsi scanning */
2201         i->t.create_work_queue = 1;
2202
2203         i->t.user_scan = fc_user_scan;
2204
2205         /*
2206          * Setup SCSI Target Attributes.
2207          */
2208         count = 0;
2209         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2210         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2211         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2212
2213         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2214
2215         i->starget_attrs[count] = NULL;
2216
2217
2218         /*
2219          * Setup SCSI Host Attributes.
2220          */
2221         count=0;
2222         SETUP_HOST_ATTRIBUTE_RD(node_name);
2223         SETUP_HOST_ATTRIBUTE_RD(port_name);
2224         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2225         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2226         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2227         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2228         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2229         if (ft->vport_create) {
2230                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2231                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2232         }
2233         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2234         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2235         SETUP_HOST_ATTRIBUTE_RD(model);
2236         SETUP_HOST_ATTRIBUTE_RD(model_description);
2237         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2238         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2239         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2240         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2241
2242         SETUP_HOST_ATTRIBUTE_RD(port_id);
2243         SETUP_HOST_ATTRIBUTE_RD(port_type);
2244         SETUP_HOST_ATTRIBUTE_RD(port_state);
2245         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2246         SETUP_HOST_ATTRIBUTE_RD(speed);
2247         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2248         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2249         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2250
2251         /* Transport-managed attributes */
2252         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2253         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2254         if (ft->issue_fc_host_lip)
2255                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2256         if (ft->vport_create)
2257                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2258         if (ft->vport_delete)
2259                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2260
2261         BUG_ON(count > FC_HOST_NUM_ATTRS);
2262
2263         i->host_attrs[count] = NULL;
2264
2265         /*
2266          * Setup Remote Port Attributes.
2267          */
2268         count=0;
2269         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2270         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2271         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2272         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2273         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2274         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2275         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2276         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2277         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2278         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2279
2280         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2281
2282         i->rport_attrs[count] = NULL;
2283
2284         /*
2285          * Setup Virtual Port Attributes.
2286          */
2287         count=0;
2288         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2289         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2290         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2291         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2292         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2293         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2294         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2295         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2296         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2297
2298         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2299
2300         i->vport_attrs[count] = NULL;
2301
2302         return &i->t;
2303 }
2304 EXPORT_SYMBOL(fc_attach_transport);
2305
2306 void fc_release_transport(struct scsi_transport_template *t)
2307 {
2308         struct fc_internal *i = to_fc_internal(t);
2309
2310         transport_container_unregister(&i->t.target_attrs);
2311         transport_container_unregister(&i->t.host_attrs);
2312         transport_container_unregister(&i->rport_attr_cont);
2313         transport_container_unregister(&i->vport_attr_cont);
2314
2315         kfree(i);
2316 }
2317 EXPORT_SYMBOL(fc_release_transport);
2318
2319 /**
2320  * fc_queue_work - Queue work to the fc_host workqueue.
2321  * @shost:      Pointer to Scsi_Host bound to fc_host.
2322  * @work:       Work to queue for execution.
2323  *
2324  * Return value:
2325  *      1 - work queued for execution
2326  *      0 - work is already queued
2327  *      -EINVAL - work queue doesn't exist
2328  */
2329 static int
2330 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2331 {
2332         if (unlikely(!fc_host_work_q(shost))) {
2333                 printk(KERN_ERR
2334                         "ERROR: FC host '%s' attempted to queue work, "
2335                         "when no workqueue created.\n", shost->hostt->name);
2336                 dump_stack();
2337
2338                 return -EINVAL;
2339         }
2340
2341         return queue_work(fc_host_work_q(shost), work);
2342 }
2343
2344 /**
2345  * fc_flush_work - Flush a fc_host's workqueue.
2346  * @shost:      Pointer to Scsi_Host bound to fc_host.
2347  */
2348 static void
2349 fc_flush_work(struct Scsi_Host *shost)
2350 {
2351         if (!fc_host_work_q(shost)) {
2352                 printk(KERN_ERR
2353                         "ERROR: FC host '%s' attempted to flush work, "
2354                         "when no workqueue created.\n", shost->hostt->name);
2355                 dump_stack();
2356                 return;
2357         }
2358
2359         flush_workqueue(fc_host_work_q(shost));
2360 }
2361
2362 /**
2363  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2364  * @shost:      Pointer to Scsi_Host bound to fc_host.
2365  * @work:       Work to queue for execution.
2366  * @delay:      jiffies to delay the work queuing
2367  *
2368  * Return value:
2369  *      1 on success / 0 already queued / < 0 for error
2370  */
2371 static int
2372 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2373                                 unsigned long delay)
2374 {
2375         if (unlikely(!fc_host_devloss_work_q(shost))) {
2376                 printk(KERN_ERR
2377                         "ERROR: FC host '%s' attempted to queue work, "
2378                         "when no workqueue created.\n", shost->hostt->name);
2379                 dump_stack();
2380
2381                 return -EINVAL;
2382         }
2383
2384         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2385 }
2386
2387 /**
2388  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2389  * @shost:      Pointer to Scsi_Host bound to fc_host.
2390  */
2391 static void
2392 fc_flush_devloss(struct Scsi_Host *shost)
2393 {
2394         if (!fc_host_devloss_work_q(shost)) {
2395                 printk(KERN_ERR
2396                         "ERROR: FC host '%s' attempted to flush work, "
2397                         "when no workqueue created.\n", shost->hostt->name);
2398                 dump_stack();
2399                 return;
2400         }
2401
2402         flush_workqueue(fc_host_devloss_work_q(shost));
2403 }
2404
2405
2406 /**
2407  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2408  * @shost:      Which &Scsi_Host
2409  *
2410  * This routine is expected to be called immediately preceding the
2411  * a driver's call to scsi_remove_host().
2412  *
2413  * WARNING: A driver utilizing the fc_transport, which fails to call
2414  *   this routine prior to scsi_remove_host(), will leave dangling
2415  *   objects in /sys/class/fc_remote_ports. Access to any of these
2416  *   objects can result in a system crash !!!
2417  *
2418  * Notes:
2419  *      This routine assumes no locks are held on entry.
2420  */
2421 void
2422 fc_remove_host(struct Scsi_Host *shost)
2423 {
2424         struct fc_vport *vport = NULL, *next_vport = NULL;
2425         struct fc_rport *rport = NULL, *next_rport = NULL;
2426         struct workqueue_struct *work_q;
2427         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2428         unsigned long flags;
2429
2430         spin_lock_irqsave(shost->host_lock, flags);
2431
2432         /* Remove any vports */
2433         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2434                 fc_queue_work(shost, &vport->vport_delete_work);
2435
2436         /* Remove any remote ports */
2437         list_for_each_entry_safe(rport, next_rport,
2438                         &fc_host->rports, peers) {
2439                 list_del(&rport->peers);
2440                 rport->port_state = FC_PORTSTATE_DELETED;
2441                 fc_queue_work(shost, &rport->rport_delete_work);
2442         }
2443
2444         list_for_each_entry_safe(rport, next_rport,
2445                         &fc_host->rport_bindings, peers) {
2446                 list_del(&rport->peers);
2447                 rport->port_state = FC_PORTSTATE_DELETED;
2448                 fc_queue_work(shost, &rport->rport_delete_work);
2449         }
2450
2451         spin_unlock_irqrestore(shost->host_lock, flags);
2452
2453         /* flush all scan work items */
2454         scsi_flush_work(shost);
2455
2456         /* flush all stgt delete, and rport delete work items, then kill it  */
2457         if (fc_host->work_q) {
2458                 work_q = fc_host->work_q;
2459                 fc_host->work_q = NULL;
2460                 destroy_workqueue(work_q);
2461         }
2462
2463         /* flush all devloss work items, then kill it  */
2464         if (fc_host->devloss_work_q) {
2465                 work_q = fc_host->devloss_work_q;
2466                 fc_host->devloss_work_q = NULL;
2467                 destroy_workqueue(work_q);
2468         }
2469 }
2470 EXPORT_SYMBOL(fc_remove_host);
2471
2472 static void fc_terminate_rport_io(struct fc_rport *rport)
2473 {
2474         struct Scsi_Host *shost = rport_to_shost(rport);
2475         struct fc_internal *i = to_fc_internal(shost->transportt);
2476
2477         /* Involve the LLDD if possible to terminate all io on the rport. */
2478         if (i->f->terminate_rport_io)
2479                 i->f->terminate_rport_io(rport);
2480
2481         /*
2482          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2483          */
2484         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2485 }
2486
2487 /**
2488  * fc_starget_delete - called to delete the scsi descendants of an rport
2489  * @work:       remote port to be operated on.
2490  *
2491  * Deletes target and all sdevs.
2492  */
2493 static void
2494 fc_starget_delete(struct work_struct *work)
2495 {
2496         struct fc_rport *rport =
2497                 container_of(work, struct fc_rport, stgt_delete_work);
2498
2499         fc_terminate_rport_io(rport);
2500         scsi_remove_target(&rport->dev);
2501 }
2502
2503
2504 /**
2505  * fc_rport_final_delete - finish rport termination and delete it.
2506  * @work:       remote port to be deleted.
2507  */
2508 static void
2509 fc_rport_final_delete(struct work_struct *work)
2510 {
2511         struct fc_rport *rport =
2512                 container_of(work, struct fc_rport, rport_delete_work);
2513         struct device *dev = &rport->dev;
2514         struct Scsi_Host *shost = rport_to_shost(rport);
2515         struct fc_internal *i = to_fc_internal(shost->transportt);
2516         unsigned long flags;
2517         int do_callback = 0;
2518
2519         fc_terminate_rport_io(rport);
2520
2521         /*
2522          * if a scan is pending, flush the SCSI Host work_q so that
2523          * that we can reclaim the rport scan work element.
2524          */
2525         if (rport->flags & FC_RPORT_SCAN_PENDING)
2526                 scsi_flush_work(shost);
2527
2528         /*
2529          * Cancel any outstanding timers. These should really exist
2530          * only when rmmod'ing the LLDD and we're asking for
2531          * immediate termination of the rports
2532          */
2533         spin_lock_irqsave(shost->host_lock, flags);
2534         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2535                 spin_unlock_irqrestore(shost->host_lock, flags);
2536                 if (!cancel_delayed_work(&rport->fail_io_work))
2537                         fc_flush_devloss(shost);
2538                 if (!cancel_delayed_work(&rport->dev_loss_work))
2539                         fc_flush_devloss(shost);
2540                 cancel_work_sync(&rport->scan_work);
2541                 spin_lock_irqsave(shost->host_lock, flags);
2542                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2543         }
2544         spin_unlock_irqrestore(shost->host_lock, flags);
2545
2546         /* Delete SCSI target and sdevs */
2547         if (rport->scsi_target_id != -1)
2548                 fc_starget_delete(&rport->stgt_delete_work);
2549
2550         /*
2551          * Notify the driver that the rport is now dead. The LLDD will
2552          * also guarantee that any communication to the rport is terminated
2553          *
2554          * Avoid this call if we already called it when we preserved the
2555          * rport for the binding.
2556          */
2557         spin_lock_irqsave(shost->host_lock, flags);
2558         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2559             (i->f->dev_loss_tmo_callbk)) {
2560                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2561                 do_callback = 1;
2562         }
2563         spin_unlock_irqrestore(shost->host_lock, flags);
2564
2565         if (do_callback)
2566                 i->f->dev_loss_tmo_callbk(rport);
2567
2568         fc_bsg_remove(rport->rqst_q);
2569
2570         transport_remove_device(dev);
2571         device_del(dev);
2572         transport_destroy_device(dev);
2573         scsi_host_put(shost);                   /* for fc_host->rport list */
2574         put_device(dev);                        /* for self-reference */
2575 }
2576
2577
2578 /**
2579  * fc_remote_port_create - allocates and creates a remote FC port.
2580  * @shost:      scsi host the remote port is connected to.
2581  * @channel:    Channel on shost port connected to.
2582  * @ids:        The world wide names, fc address, and FC4 port
2583  *              roles for the remote port.
2584  *
2585  * Allocates and creates the remoter port structure, including the
2586  * class and sysfs creation.
2587  *
2588  * Notes:
2589  *      This routine assumes no locks are held on entry.
2590  */
2591 static struct fc_rport *
2592 fc_remote_port_create(struct Scsi_Host *shost, int channel,
2593                       struct fc_rport_identifiers  *ids)
2594 {
2595         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2596         struct fc_internal *fci = to_fc_internal(shost->transportt);
2597         struct fc_rport *rport;
2598         struct device *dev;
2599         unsigned long flags;
2600         int error;
2601         size_t size;
2602
2603         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2604         rport = kzalloc(size, GFP_KERNEL);
2605         if (unlikely(!rport)) {
2606                 printk(KERN_ERR "%s: allocation failure\n", __func__);
2607                 return NULL;
2608         }
2609
2610         rport->maxframe_size = -1;
2611         rport->supported_classes = FC_COS_UNSPECIFIED;
2612         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2613         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2614         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2615         rport->port_id = ids->port_id;
2616         rport->roles = ids->roles;
2617         rport->port_state = FC_PORTSTATE_ONLINE;
2618         if (fci->f->dd_fcrport_size)
2619                 rport->dd_data = &rport[1];
2620         rport->channel = channel;
2621         rport->fast_io_fail_tmo = -1;
2622
2623         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2624         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2625         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2626         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2627         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2628
2629         spin_lock_irqsave(shost->host_lock, flags);
2630
2631         rport->number = fc_host->next_rport_number++;
2632         if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
2633             (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
2634                 rport->scsi_target_id = fc_host->next_target_id++;
2635         else
2636                 rport->scsi_target_id = -1;
2637         list_add_tail(&rport->peers, &fc_host->rports);
2638         scsi_host_get(shost);                   /* for fc_host->rport list */
2639
2640         spin_unlock_irqrestore(shost->host_lock, flags);
2641
2642         dev = &rport->dev;
2643         device_initialize(dev);                 /* takes self reference */
2644         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2645         dev->release = fc_rport_dev_release;
2646         dev_set_name(dev, "rport-%d:%d-%d",
2647                      shost->host_no, channel, rport->number);
2648         transport_setup_device(dev);
2649
2650         error = device_add(dev);
2651         if (error) {
2652                 printk(KERN_ERR "FC Remote Port device_add failed\n");
2653                 goto delete_rport;
2654         }
2655         transport_add_device(dev);
2656         transport_configure_device(dev);
2657
2658         fc_bsg_rportadd(shost, rport);
2659         /* ignore any bsg add error - we just can't do sgio */
2660
2661         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2662                 /* initiate a scan of the target */
2663                 rport->flags |= FC_RPORT_SCAN_PENDING;
2664                 scsi_queue_work(shost, &rport->scan_work);
2665         }
2666
2667         return rport;
2668
2669 delete_rport:
2670         transport_destroy_device(dev);
2671         spin_lock_irqsave(shost->host_lock, flags);
2672         list_del(&rport->peers);
2673         scsi_host_put(shost);                   /* for fc_host->rport list */
2674         spin_unlock_irqrestore(shost->host_lock, flags);
2675         put_device(dev->parent);
2676         kfree(rport);
2677         return NULL;
2678 }
2679
2680 /**
2681  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2682  * @shost:      scsi host the remote port is connected to.
2683  * @channel:    Channel on shost port connected to.
2684  * @ids:        The world wide names, fc address, and FC4 port
2685  *              roles for the remote port.
2686  *
2687  * The LLDD calls this routine to notify the transport of the existence
2688  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2689  * of the port, it's FC address (port_id), and the FC4 roles that are
2690  * active for the port.
2691  *
2692  * For ports that are FCP targets (aka scsi targets), the FC transport
2693  * maintains consistent target id bindings on behalf of the LLDD.
2694  * A consistent target id binding is an assignment of a target id to
2695  * a remote port identifier, which persists while the scsi host is
2696  * attached. The remote port can disappear, then later reappear, and
2697  * it's target id assignment remains the same. This allows for shifts
2698  * in FC addressing (if binding by wwpn or wwnn) with no apparent
2699  * changes to the scsi subsystem which is based on scsi host number and
2700  * target id values.  Bindings are only valid during the attachment of
2701  * the scsi host. If the host detaches, then later re-attaches, target
2702  * id bindings may change.
2703  *
2704  * This routine is responsible for returning a remote port structure.
2705  * The routine will search the list of remote ports it maintains
2706  * internally on behalf of consistent target id mappings. If found, the
2707  * remote port structure will be reused. Otherwise, a new remote port
2708  * structure will be allocated.
2709  *
2710  * Whenever a remote port is allocated, a new fc_remote_port class
2711  * device is created.
2712  *
2713  * Should not be called from interrupt context.
2714  *
2715  * Notes:
2716  *      This routine assumes no locks are held on entry.
2717  */
2718 struct fc_rport *
2719 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2720         struct fc_rport_identifiers  *ids)
2721 {
2722         struct fc_internal *fci = to_fc_internal(shost->transportt);
2723         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2724         struct fc_rport *rport;
2725         unsigned long flags;
2726         int match = 0;
2727
2728         /* ensure any stgt delete functions are done */
2729         fc_flush_work(shost);
2730
2731         /*
2732          * Search the list of "active" rports, for an rport that has been
2733          * deleted, but we've held off the real delete while the target
2734          * is in a "blocked" state.
2735          */
2736         spin_lock_irqsave(shost->host_lock, flags);
2737
2738         list_for_each_entry(rport, &fc_host->rports, peers) {
2739
2740                 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2741                         (rport->channel == channel)) {
2742
2743                         switch (fc_host->tgtid_bind_type) {
2744                         case FC_TGTID_BIND_BY_WWPN:
2745                         case FC_TGTID_BIND_NONE:
2746                                 if (rport->port_name == ids->port_name)
2747                                         match = 1;
2748                                 break;
2749                         case FC_TGTID_BIND_BY_WWNN:
2750                                 if (rport->node_name == ids->node_name)
2751                                         match = 1;
2752                                 break;
2753                         case FC_TGTID_BIND_BY_ID:
2754                                 if (rport->port_id == ids->port_id)
2755                                         match = 1;
2756                                 break;
2757                         }
2758
2759                         if (match) {
2760
2761                                 memcpy(&rport->node_name, &ids->node_name,
2762                                         sizeof(rport->node_name));
2763                                 memcpy(&rport->port_name, &ids->port_name,
2764                                         sizeof(rport->port_name));
2765                                 rport->port_id = ids->port_id;
2766
2767                                 rport->port_state = FC_PORTSTATE_ONLINE;
2768                                 rport->roles = ids->roles;
2769
2770                                 spin_unlock_irqrestore(shost->host_lock, flags);
2771
2772                                 if (fci->f->dd_fcrport_size)
2773                                         memset(rport->dd_data, 0,
2774                                                 fci->f->dd_fcrport_size);
2775
2776                                 /*
2777                                  * If we were not a target, cancel the
2778                                  * io terminate and rport timers, and
2779                                  * we're done.
2780                                  *
2781                                  * If we were a target, but our new role
2782                                  * doesn't indicate a target, leave the
2783                                  * timers running expecting the role to
2784                                  * change as the target fully logs in. If
2785                                  * it doesn't, the target will be torn down.
2786                                  *
2787                                  * If we were a target, and our role shows
2788                                  * we're still a target, cancel the timers
2789                                  * and kick off a scan.
2790                                  */
2791
2792                                 /* was a target, not in roles */
2793                                 if ((rport->scsi_target_id != -1) &&
2794                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2795                                         return rport;
2796
2797                                 /*
2798                                  * Stop the fail io and dev_loss timers.
2799                                  * If they flush, the port_state will
2800                                  * be checked and will NOOP the function.
2801                                  */
2802                                 if (!cancel_delayed_work(&rport->fail_io_work))
2803                                         fc_flush_devloss(shost);
2804                                 if (!cancel_delayed_work(&rport->dev_loss_work))
2805                                         fc_flush_devloss(shost);
2806
2807                                 spin_lock_irqsave(shost->host_lock, flags);
2808
2809                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2810                                                   FC_RPORT_DEVLOSS_PENDING |
2811                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
2812
2813                                 spin_unlock_irqrestore(shost->host_lock, flags);
2814
2815                                 /* if target, initiate a scan */
2816                                 if (rport->scsi_target_id != -1) {
2817                                         scsi_target_unblock(&rport->dev,
2818                                                             SDEV_RUNNING);
2819                                         spin_lock_irqsave(shost->host_lock,
2820                                                           flags);
2821                                         rport->flags |= FC_RPORT_SCAN_PENDING;
2822                                         scsi_queue_work(shost,
2823                                                         &rport->scan_work);
2824                                         spin_unlock_irqrestore(shost->host_lock,
2825                                                         flags);
2826                                 }
2827
2828                                 fc_bsg_goose_queue(rport);
2829
2830                                 return rport;
2831                         }
2832                 }
2833         }
2834
2835         /*
2836          * Search the bindings array
2837          * Note: if never a FCP target, you won't be on this list
2838          */
2839         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2840
2841                 /* search for a matching consistent binding */
2842
2843                 list_for_each_entry(rport, &fc_host->rport_bindings,
2844                                         peers) {
2845                         if (rport->channel != channel)
2846                                 continue;
2847
2848                         switch (fc_host->tgtid_bind_type) {
2849                         case FC_TGTID_BIND_BY_WWPN:
2850                                 if (rport->port_name == ids->port_name)
2851                                         match = 1;
2852                                 break;
2853                         case FC_TGTID_BIND_BY_WWNN:
2854                                 if (rport->node_name == ids->node_name)
2855                                         match = 1;
2856                                 break;
2857                         case FC_TGTID_BIND_BY_ID:
2858                                 if (rport->port_id == ids->port_id)
2859                                         match = 1;
2860                                 break;
2861                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2862                                 break;
2863                         }
2864
2865                         if (match) {
2866                                 list_move_tail(&rport->peers, &fc_host->rports);
2867                                 break;
2868                         }
2869                 }
2870
2871                 if (match) {
2872                         memcpy(&rport->node_name, &ids->node_name,
2873                                 sizeof(rport->node_name));
2874                         memcpy(&rport->port_name, &ids->port_name,
2875                                 sizeof(rport->port_name));
2876                         rport->port_id = ids->port_id;
2877                         rport->roles = ids->roles;
2878                         rport->port_state = FC_PORTSTATE_ONLINE;
2879                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2880
2881                         if (fci->f->dd_fcrport_size)
2882                                 memset(rport->dd_data, 0,
2883                                                 fci->f->dd_fcrport_size);
2884                         spin_unlock_irqrestore(shost->host_lock, flags);
2885
2886                         if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
2887                                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
2888
2889                                 /* initiate a scan of the target */
2890                                 spin_lock_irqsave(shost->host_lock, flags);
2891                                 rport->flags |= FC_RPORT_SCAN_PENDING;
2892                                 scsi_queue_work(shost, &rport->scan_work);
2893                                 spin_unlock_irqrestore(shost->host_lock, flags);
2894                         }
2895                         return rport;
2896                 }
2897         }
2898
2899         spin_unlock_irqrestore(shost->host_lock, flags);
2900
2901         /* No consistent binding found - create new remote port entry */
2902         rport = fc_remote_port_create(shost, channel, ids);
2903
2904         return rport;
2905 }
2906 EXPORT_SYMBOL(fc_remote_port_add);
2907
2908
2909 /**
2910  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2911  * @rport:      The remote port that no longer exists
2912  *
2913  * The LLDD calls this routine to notify the transport that a remote
2914  * port is no longer part of the topology. Note: Although a port
2915  * may no longer be part of the topology, it may persist in the remote
2916  * ports displayed by the fc_host. We do this under 2 conditions:
2917  *
2918  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2919  *    This allows the port to temporarily disappear, then reappear without
2920  *    disrupting the SCSI device tree attached to it. During the "blocked"
2921  *    period the port will still exist.
2922  *
2923  * 2) If the port was a scsi target and disappears for longer than we
2924  *    expect, we'll delete the port and the tear down the SCSI device tree
2925  *    attached to it. However, we want to semi-persist the target id assigned
2926  *    to that port if it eventually does exist. The port structure will
2927  *    remain (although with minimal information) so that the target id
2928  *    bindings also remain.
2929  *
2930  * If the remote port is not an FCP Target, it will be fully torn down
2931  * and deallocated, including the fc_remote_port class device.
2932  *
2933  * If the remote port is an FCP Target, the port will be placed in a
2934  * temporary blocked state. From the LLDD's perspective, the rport no
2935  * longer exists. From the SCSI midlayer's perspective, the SCSI target
2936  * exists, but all sdevs on it are blocked from further I/O. The following
2937  * is then expected.
2938  *
2939  *   If the remote port does not return (signaled by a LLDD call to
2940  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2941  *   scsi target is removed - killing all outstanding i/o and removing the
2942  *   scsi devices attached to it. The port structure will be marked Not
2943  *   Present and be partially cleared, leaving only enough information to
2944  *   recognize the remote port relative to the scsi target id binding if
2945  *   it later appears.  The port will remain as long as there is a valid
2946  *   binding (e.g. until the user changes the binding type or unloads the
2947  *   scsi host with the binding).
2948  *
2949  *   If the remote port returns within the dev_loss_tmo value (and matches
2950  *   according to the target id binding type), the port structure will be
2951  *   reused. If it is no longer a SCSI target, the target will be torn
2952  *   down. If it continues to be a SCSI target, then the target will be
2953  *   unblocked (allowing i/o to be resumed), and a scan will be activated
2954  *   to ensure that all luns are detected.
2955  *
2956  * Called from normal process context only - cannot be called from interrupt.
2957  *
2958  * Notes:
2959  *      This routine assumes no locks are held on entry.
2960  */
2961 void
2962 fc_remote_port_delete(struct fc_rport  *rport)
2963 {
2964         struct Scsi_Host *shost = rport_to_shost(rport);
2965         unsigned long timeout = rport->dev_loss_tmo;
2966         unsigned long flags;
2967
2968         /*
2969          * No need to flush the fc_host work_q's, as all adds are synchronous.
2970          *
2971          * We do need to reclaim the rport scan work element, so eventually
2972          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2973          * there's still a scan pending.
2974          */
2975
2976         spin_lock_irqsave(shost->host_lock, flags);
2977
2978         if (rport->port_state != FC_PORTSTATE_ONLINE) {
2979                 spin_unlock_irqrestore(shost->host_lock, flags);
2980                 return;
2981         }
2982
2983         /*
2984          * In the past, we if this was not an FCP-Target, we would
2985          * unconditionally just jump to deleting the rport.
2986          * However, rports can be used as node containers by the LLDD,
2987          * and its not appropriate to just terminate the rport at the
2988          * first sign of a loss in connectivity. The LLDD may want to
2989          * send ELS traffic to re-validate the login. If the rport is
2990          * immediately deleted, it makes it inappropriate for a node
2991          * container.
2992          * So... we now unconditionally wait dev_loss_tmo before
2993          * destroying an rport.
2994          */
2995
2996         rport->port_state = FC_PORTSTATE_BLOCKED;
2997
2998         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2999
3000         spin_unlock_irqrestore(shost->host_lock, flags);
3001
3002         scsi_target_block(&rport->dev);
3003
3004         /* see if we need to kill io faster than waiting for device loss */
3005         if ((rport->fast_io_fail_tmo != -1) &&
3006             (rport->fast_io_fail_tmo < timeout))
3007                 fc_queue_devloss_work(shost, &rport->fail_io_work,
3008                                         rport->fast_io_fail_tmo * HZ);
3009
3010         /* cap the length the devices can be blocked until they are deleted */
3011         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3012 }
3013 EXPORT_SYMBOL(fc_remote_port_delete);
3014
3015 /**
3016  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3017  * @rport:      The remote port that changed.
3018  * @roles:      New roles for this port.
3019  *
3020  * Description: The LLDD calls this routine to notify the transport that the
3021  * roles on a remote port may have changed. The largest effect of this is
3022  * if a port now becomes a FCP Target, it must be allocated a
3023  * scsi target id.  If the port is no longer a FCP target, any
3024  * scsi target id value assigned to it will persist in case the
3025  * role changes back to include FCP Target. No changes in the scsi
3026  * midlayer will be invoked if the role changes (in the expectation
3027  * that the role will be resumed. If it doesn't normal error processing
3028  * will take place).
3029  *
3030  * Should not be called from interrupt context.
3031  *
3032  * Notes:
3033  *      This routine assumes no locks are held on entry.
3034  */
3035 void
3036 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3037 {
3038         struct Scsi_Host *shost = rport_to_shost(rport);
3039         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3040         unsigned long flags;
3041         int create = 0;
3042
3043         spin_lock_irqsave(shost->host_lock, flags);
3044         if (roles & FC_PORT_ROLE_FCP_TARGET) {
3045                 if (rport->scsi_target_id == -1) {
3046                         rport->scsi_target_id = fc_host->next_target_id++;
3047                         create = 1;
3048                 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3049                         create = 1;
3050         }
3051
3052         rport->roles = roles;
3053
3054         spin_unlock_irqrestore(shost->host_lock, flags);
3055
3056         if (create) {
3057                 /*
3058                  * There may have been a delete timer running on the
3059                  * port. Ensure that it is cancelled as we now know
3060                  * the port is an FCP Target.
3061                  * Note: we know the rport exists and is in an online
3062                  *  state as the LLDD would not have had an rport
3063                  *  reference to pass us.
3064                  *
3065                  * Take no action on the del_timer failure as the state
3066                  * machine state change will validate the
3067                  * transaction.
3068                  */
3069                 if (!cancel_delayed_work(&rport->fail_io_work))
3070                         fc_flush_devloss(shost);
3071                 if (!cancel_delayed_work(&rport->dev_loss_work))
3072                         fc_flush_devloss(shost);
3073
3074                 spin_lock_irqsave(shost->host_lock, flags);
3075                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3076                                   FC_RPORT_DEVLOSS_PENDING |
3077                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3078                 spin_unlock_irqrestore(shost->host_lock, flags);
3079
3080                 /* ensure any stgt delete functions are done */
3081                 fc_flush_work(shost);
3082
3083                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3084                 /* initiate a scan of the target */
3085                 spin_lock_irqsave(shost->host_lock, flags);
3086                 rport->flags |= FC_RPORT_SCAN_PENDING;
3087                 scsi_queue_work(shost, &rport->scan_work);
3088                 spin_unlock_irqrestore(shost->host_lock, flags);
3089         }
3090 }
3091 EXPORT_SYMBOL(fc_remote_port_rolechg);
3092
3093 /**
3094  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3095  * @work:       rport target that failed to reappear in the allotted time.
3096  *
3097  * Description: An attempt to delete a remote port blocks, and if it fails
3098  *              to return in the allotted time this gets called.
3099  */
3100 static void
3101 fc_timeout_deleted_rport(struct work_struct *work)
3102 {
3103         struct fc_rport *rport =
3104                 container_of(work, struct fc_rport, dev_loss_work.work);
3105         struct Scsi_Host *shost = rport_to_shost(rport);
3106         struct fc_internal *i = to_fc_internal(shost->transportt);
3107         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3108         unsigned long flags;
3109         int do_callback = 0;
3110
3111         spin_lock_irqsave(shost->host_lock, flags);
3112
3113         rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3114
3115         /*
3116          * If the port is ONLINE, then it came back. If it was a SCSI
3117          * target, validate it still is. If not, tear down the
3118          * scsi_target on it.
3119          */
3120         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3121             (rport->scsi_target_id != -1) &&
3122             !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3123                 dev_printk(KERN_ERR, &rport->dev,
3124                         "blocked FC remote port time out: no longer"
3125                         " a FCP target, removing starget\n");
3126                 spin_unlock_irqrestore(shost->host_lock, flags);
3127                 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3128                 fc_queue_work(shost, &rport->stgt_delete_work);
3129                 return;
3130         }
3131
3132         /* NOOP state - we're flushing workq's */
3133         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3134                 spin_unlock_irqrestore(shost->host_lock, flags);
3135                 dev_printk(KERN_ERR, &rport->dev,
3136                         "blocked FC remote port time out: leaving"
3137                         " rport%s alone\n",
3138                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3139                 return;
3140         }
3141
3142         if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3143             (rport->scsi_target_id == -1)) {
3144                 list_del(&rport->peers);
3145                 rport->port_state = FC_PORTSTATE_DELETED;
3146                 dev_printk(KERN_ERR, &rport->dev,
3147                         "blocked FC remote port time out: removing"
3148                         " rport%s\n",
3149                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3150                 fc_queue_work(shost, &rport->rport_delete_work);
3151                 spin_unlock_irqrestore(shost->host_lock, flags);
3152                 return;
3153         }
3154
3155         dev_printk(KERN_ERR, &rport->dev,
3156                 "blocked FC remote port time out: removing target and "
3157                 "saving binding\n");
3158
3159         list_move_tail(&rport->peers, &fc_host->rport_bindings);
3160
3161         /*
3162          * Note: We do not remove or clear the hostdata area. This allows
3163          *   host-specific target data to persist along with the
3164          *   scsi_target_id. It's up to the host to manage it's hostdata area.
3165          */
3166
3167         /*
3168          * Reinitialize port attributes that may change if the port comes back.
3169          */
3170         rport->maxframe_size = -1;
3171         rport->supported_classes = FC_COS_UNSPECIFIED;
3172         rport->roles = FC_PORT_ROLE_UNKNOWN;
3173         rport->port_state = FC_PORTSTATE_NOTPRESENT;
3174         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3175
3176         /*
3177          * Pre-emptively kill I/O rather than waiting for the work queue
3178          * item to teardown the starget. (FCOE libFC folks prefer this
3179          * and to have the rport_port_id still set when it's done).
3180          */
3181         spin_unlock_irqrestore(shost->host_lock, flags);
3182         fc_terminate_rport_io(rport);
3183
3184         spin_lock_irqsave(shost->host_lock, flags);
3185
3186         if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {     /* still missing */
3187
3188                 /* remove the identifiers that aren't used in the consisting binding */
3189                 switch (fc_host->tgtid_bind_type) {
3190                 case FC_TGTID_BIND_BY_WWPN:
3191                         rport->node_name = -1;
3192                         rport->port_id = -1;
3193                         break;
3194                 case FC_TGTID_BIND_BY_WWNN:
3195                         rport->port_name = -1;
3196                         rport->port_id = -1;
3197                         break;
3198                 case FC_TGTID_BIND_BY_ID:
3199                         rport->node_name = -1;
3200                         rport->port_name = -1;
3201                         break;
3202                 case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
3203                         break;
3204                 }
3205
3206                 /*
3207                  * As this only occurs if the remote port (scsi target)
3208                  * went away and didn't come back - we'll remove
3209                  * all attached scsi devices.
3210                  */
3211                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3212                 fc_queue_work(shost, &rport->stgt_delete_work);
3213
3214                 do_callback = 1;
3215         }
3216
3217         spin_unlock_irqrestore(shost->host_lock, flags);
3218
3219         /*
3220          * Notify the driver that the rport is now dead. The LLDD will
3221          * also guarantee that any communication to the rport is terminated
3222          *
3223          * Note: we set the CALLBK_DONE flag above to correspond
3224          */
3225         if (do_callback && i->f->dev_loss_tmo_callbk)
3226                 i->f->dev_loss_tmo_callbk(rport);
3227 }
3228
3229
3230 /**
3231  * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3232  * @work:       rport to terminate io on.
3233  *
3234  * Notes: Only requests the failure of the io, not that all are flushed
3235  *    prior to returning.
3236  */
3237 static void
3238 fc_timeout_fail_rport_io(struct work_struct *work)
3239 {
3240         struct fc_rport *rport =
3241                 container_of(work, struct fc_rport, fail_io_work.work);
3242
3243         if (rport->port_state != FC_PORTSTATE_BLOCKED)
3244                 return;
3245
3246         rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3247         fc_terminate_rport_io(rport);
3248 }
3249
3250 /**
3251  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3252  * @work:       remote port to be scanned.
3253  */
3254 static void
3255 fc_scsi_scan_rport(struct work_struct *work)
3256 {
3257         struct fc_rport *rport =
3258                 container_of(work, struct fc_rport, scan_work);
3259         struct Scsi_Host *shost = rport_to_shost(rport);
3260         struct fc_internal *i = to_fc_internal(shost->transportt);
3261         unsigned long flags;
3262
3263         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3264             (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3265             !(i->f->disable_target_scan)) {
3266                 scsi_scan_target(&rport->dev, rport->channel,
3267                                  rport->scsi_target_id, SCAN_WILD_CARD,
3268                                  SCSI_SCAN_RESCAN);
3269         }
3270
3271         spin_lock_irqsave(shost->host_lock, flags);
3272         rport->flags &= ~FC_RPORT_SCAN_PENDING;
3273         spin_unlock_irqrestore(shost->host_lock, flags);
3274 }
3275
3276 /**
3277  * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3278  * @cmnd: SCSI command that scsi_eh is trying to recover
3279  *
3280  * This routine can be called from a FC LLD scsi_eh callback. It
3281  * blocks the scsi_eh thread until the fc_rport leaves the
3282  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3283  * necessary to avoid the scsi_eh failing recovery actions for blocked
3284  * rports which would lead to offlined SCSI devices.
3285  *
3286  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3287  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3288  *          passed back to scsi_eh.
3289  */
3290 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3291 {
3292         struct Scsi_Host *shost = cmnd->device->host;
3293         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3294         unsigned long flags;
3295
3296         spin_lock_irqsave(shost->host_lock, flags);
3297         while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3298                !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3299                 spin_unlock_irqrestore(shost->host_lock, flags);
3300                 msleep(1000);
3301                 spin_lock_irqsave(shost->host_lock, flags);
3302         }
3303         spin_unlock_irqrestore(shost->host_lock, flags);
3304
3305         if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3306                 return FAST_IO_FAIL;
3307
3308         return 0;
3309 }
3310 EXPORT_SYMBOL(fc_block_scsi_eh);
3311
3312 /**
3313  * fc_vport_setup - allocates and creates a FC virtual port.
3314  * @shost:      scsi host the virtual port is connected to.
3315  * @channel:    Channel on shost port connected to.
3316  * @pdev:       parent device for vport
3317  * @ids:        The world wide names, FC4 port roles, etc for
3318  *              the virtual port.
3319  * @ret_vport:  The pointer to the created vport.
3320  *
3321  * Allocates and creates the vport structure, calls the parent host
3322  * to instantiate the vport, this completes w/ class and sysfs creation.
3323  *
3324  * Notes:
3325  *      This routine assumes no locks are held on entry.
3326  */
3327 static int
3328 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3329         struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
3330 {
3331         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3332         struct fc_internal *fci = to_fc_internal(shost->transportt);
3333         struct fc_vport *vport;
3334         struct device *dev;
3335         unsigned long flags;
3336         size_t size;
3337         int error;
3338
3339         *ret_vport = NULL;
3340
3341         if ( ! fci->f->vport_create)
3342                 return -ENOENT;
3343
3344         size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3345         vport = kzalloc(size, GFP_KERNEL);
3346         if (unlikely(!vport)) {
3347                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3348                 return -ENOMEM;
3349         }
3350
3351         vport->vport_state = FC_VPORT_UNKNOWN;
3352         vport->vport_last_state = FC_VPORT_UNKNOWN;
3353         vport->node_name = ids->node_name;
3354         vport->port_name = ids->port_name;
3355         vport->roles = ids->roles;
3356         vport->vport_type = ids->vport_type;
3357         if (fci->f->dd_fcvport_size)
3358                 vport->dd_data = &vport[1];
3359         vport->shost = shost;
3360         vport->channel = channel;
3361         vport->flags = FC_VPORT_CREATING;
3362         INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3363
3364         spin_lock_irqsave(shost->host_lock, flags);
3365
3366         if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3367                 spin_unlock_irqrestore(shost->host_lock, flags);
3368                 kfree(vport);
3369                 return -ENOSPC;
3370         }
3371         fc_host->npiv_vports_inuse++;
3372         vport->number = fc_host->next_vport_number++;
3373         list_add_tail(&vport->peers, &fc_host->vports);
3374         scsi_host_get(shost);                   /* for fc_host->vport list */
3375
3376         spin_unlock_irqrestore(shost->host_lock, flags);
3377
3378         dev = &vport->dev;
3379         device_initialize(dev);                 /* takes self reference */
3380         dev->parent = get_device(pdev);         /* takes parent reference */
3381         dev->release = fc_vport_dev_release;
3382         dev_set_name(dev, "vport-%d:%d-%d",
3383                      shost->host_no, channel, vport->number);
3384         transport_setup_device(dev);
3385
3386         error = device_add(dev);
3387         if (error) {
3388                 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3389                 goto delete_vport;
3390         }
3391         transport_add_device(dev);
3392         transport_configure_device(dev);
3393
3394         error = fci->f->vport_create(vport, ids->disable);
3395         if (error) {
3396                 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3397                 goto delete_vport_all;
3398         }
3399
3400         /*
3401          * if the parent isn't the physical adapter's Scsi_Host, ensure
3402          * the Scsi_Host at least contains a symlink to the vport.
3403          */
3404         if (pdev != &shost->shost_gendev) {
3405                 error = sysfs_create_link(&shost->shost_gendev.kobj,
3406                                  &dev->kobj, dev_name(dev));
3407                 if (error)
3408                         printk(KERN_ERR
3409                                 "%s: Cannot create vport symlinks for "
3410                                 "%s, err=%d\n",
3411                                 __func__, dev_name(dev), error);
3412         }
3413         spin_lock_irqsave(shost->host_lock, flags);
3414         vport->flags &= ~FC_VPORT_CREATING;
3415         spin_unlock_irqrestore(shost->host_lock, flags);
3416
3417         dev_printk(KERN_NOTICE, pdev,
3418                         "%s created via shost%d channel %d\n", dev_name(dev),
3419                         shost->host_no, channel);
3420
3421         *ret_vport = vport;
3422
3423         return 0;
3424
3425 delete_vport_all:
3426         transport_remove_device(dev);
3427         device_del(dev);
3428 delete_vport:
3429         transport_destroy_device(dev);
3430         spin_lock_irqsave(shost->host_lock, flags);
3431         list_del(&vport->peers);
3432         scsi_host_put(shost);                   /* for fc_host->vport list */
3433         fc_host->npiv_vports_inuse--;
3434         spin_unlock_irqrestore(shost->host_lock, flags);
3435         put_device(dev->parent);
3436         kfree(vport);
3437
3438         return error;
3439 }
3440
3441 /**
3442  * fc_vport_create - Admin App or LLDD requests creation of a vport
3443  * @shost:      scsi host the virtual port is connected to.
3444  * @channel:    channel on shost port connected to.
3445  * @ids:        The world wide names, FC4 port roles, etc for
3446  *              the virtual port.
3447  *
3448  * Notes:
3449  *      This routine assumes no locks are held on entry.
3450  */
3451 struct fc_vport *
3452 fc_vport_create(struct Scsi_Host *shost, int channel,
3453         struct fc_vport_identifiers *ids)
3454 {
3455         int stat;
3456         struct fc_vport *vport;
3457
3458         stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3459                  ids, &vport);
3460         return stat ? NULL : vport;
3461 }
3462 EXPORT_SYMBOL(fc_vport_create);
3463
3464 /**
3465  * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3466  * @vport:      fc_vport to be terminated
3467  *
3468  * Calls the LLDD vport_delete() function, then deallocates and removes
3469  * the vport from the shost and object tree.
3470  *
3471  * Notes:
3472  *      This routine assumes no locks are held on entry.
3473  */
3474 int
3475 fc_vport_terminate(struct fc_vport *vport)
3476 {
3477         struct Scsi_Host *shost = vport_to_shost(vport);
3478         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3479         struct fc_internal *i = to_fc_internal(shost->transportt);
3480         struct device *dev = &vport->dev;
3481         unsigned long flags;
3482         int stat;
3483
3484         if (i->f->vport_delete)
3485                 stat = i->f->vport_delete(vport);
3486         else
3487                 stat = -ENOENT;
3488
3489         spin_lock_irqsave(shost->host_lock, flags);
3490         vport->flags &= ~FC_VPORT_DELETING;
3491         if (!stat) {
3492                 vport->flags |= FC_VPORT_DELETED;
3493                 list_del(&vport->peers);
3494                 fc_host->npiv_vports_inuse--;
3495                 scsi_host_put(shost);           /* for fc_host->vport list */
3496         }
3497         spin_unlock_irqrestore(shost->host_lock, flags);
3498
3499         if (stat)
3500                 return stat;
3501
3502         if (dev->parent != &shost->shost_gendev)
3503                 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3504         transport_remove_device(dev);
3505         device_del(dev);
3506         transport_destroy_device(dev);
3507
3508         /*
3509          * Removing our self-reference should mean our
3510          * release function gets called, which will drop the remaining
3511          * parent reference and free the data structure.
3512          */
3513         put_device(dev);                        /* for self-reference */
3514
3515         return 0; /* SUCCESS */
3516 }
3517 EXPORT_SYMBOL(fc_vport_terminate);
3518
3519 /**
3520  * fc_vport_sched_delete - workq-based delete request for a vport
3521  * @work:       vport to be deleted.
3522  */
3523 static void
3524 fc_vport_sched_delete(struct work_struct *work)
3525 {
3526         struct fc_vport *vport =
3527                 container_of(work, struct fc_vport, vport_delete_work);
3528         int stat;
3529
3530         stat = fc_vport_terminate(vport);
3531         if (stat)
3532                 dev_printk(KERN_ERR, vport->dev.parent,
3533                         "%s: %s could not be deleted created via "
3534                         "shost%d channel %d - error %d\n", __func__,
3535                         dev_name(&vport->dev), vport->shost->host_no,
3536                         vport->channel, stat);
3537 }
3538
3539
3540 /*
3541  * BSG support
3542  */
3543
3544 /**
3545  * fc_bsg_job_timeout - handler for when a bsg request timesout
3546  * @req:        request that timed out
3547  */
3548 static enum blk_eh_timer_return
3549 fc_bsg_job_timeout(struct request *req)
3550 {
3551         struct bsg_job *job = (void *) req->special;
3552         struct Scsi_Host *shost = fc_bsg_to_shost(job);
3553         struct fc_rport *rport = fc_bsg_to_rport(job);
3554         struct fc_internal *i = to_fc_internal(shost->transportt);
3555         int err = 0, inflight = 0;
3556
3557         if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
3558                 return BLK_EH_RESET_TIMER;
3559
3560         inflight = bsg_job_get(job);
3561
3562         if (inflight && i->f->bsg_timeout) {
3563                 /* call LLDD to abort the i/o as it has timed out */
3564                 err = i->f->bsg_timeout(job);
3565                 if (err == -EAGAIN) {
3566                         bsg_job_put(job);
3567                         return BLK_EH_RESET_TIMER;
3568                 } else if (err)
3569                         printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3570                                 "abort failed with status %d\n", err);
3571         }
3572
3573         /* the blk_end_sync_io() doesn't check the error */
3574         if (!inflight)
3575                 return BLK_EH_NOT_HANDLED;
3576         else
3577                 return BLK_EH_HANDLED;
3578 }
3579
3580 /**
3581  * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3582  * @shost:      scsi host rport attached to
3583  * @job:        bsg job to be processed
3584  */
3585 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3586 {
3587         struct fc_internal *i = to_fc_internal(shost->transportt);
3588         struct fc_bsg_request *bsg_request = job->request;
3589         struct fc_bsg_reply *bsg_reply = job->reply;
3590         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3591         int ret;
3592
3593         /* check if we really have all the request data needed */
3594         if (job->request_len < cmdlen) {
3595                 ret = -ENOMSG;
3596                 goto fail_host_msg;
3597         }
3598
3599         /* Validate the host command */
3600         switch (bsg_request->msgcode) {
3601         case FC_BSG_HST_ADD_RPORT:
3602                 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3603                 break;
3604
3605         case FC_BSG_HST_DEL_RPORT:
3606                 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3607                 break;
3608
3609         case FC_BSG_HST_ELS_NOLOGIN:
3610                 cmdlen += sizeof(struct fc_bsg_host_els);
3611                 /* there better be a xmt and rcv payloads */
3612                 if ((!job->request_payload.payload_len) ||
3613                     (!job->reply_payload.payload_len)) {
3614                         ret = -EINVAL;
3615                         goto fail_host_msg;
3616                 }
3617                 break;
3618
3619         case FC_BSG_HST_CT:
3620                 cmdlen += sizeof(struct fc_bsg_host_ct);
3621                 /* there better be xmt and rcv payloads */
3622                 if ((!job->request_payload.payload_len) ||
3623                     (!job->reply_payload.payload_len)) {
3624                         ret = -EINVAL;
3625                         goto fail_host_msg;
3626                 }
3627                 break;
3628
3629         case FC_BSG_HST_VENDOR:
3630                 cmdlen += sizeof(struct fc_bsg_host_vendor);
3631                 if ((shost->hostt->vendor_id == 0L) ||
3632                     (bsg_request->rqst_data.h_vendor.vendor_id !=
3633                         shost->hostt->vendor_id)) {
3634                         ret = -ESRCH;
3635                         goto fail_host_msg;
3636                 }
3637                 break;
3638
3639         default:
3640                 ret = -EBADR;
3641                 goto fail_host_msg;
3642         }
3643
3644         ret = i->f->bsg_request(job);
3645         if (!ret)
3646                 return 0;
3647
3648 fail_host_msg:
3649         /* return the errno failure code as the only status */
3650         BUG_ON(job->reply_len < sizeof(uint32_t));
3651         bsg_reply->reply_payload_rcv_len = 0;
3652         bsg_reply->result = ret;
3653         job->reply_len = sizeof(uint32_t);
3654         bsg_job_done(job, bsg_reply->result,
3655                        bsg_reply->reply_payload_rcv_len);
3656         return 0;
3657 }
3658
3659
3660 /*
3661  * fc_bsg_goose_queue - restart rport queue in case it was stopped
3662  * @rport:      rport to be restarted
3663  */
3664 static void
3665 fc_bsg_goose_queue(struct fc_rport *rport)
3666 {
3667         struct request_queue *q = rport->rqst_q;
3668         unsigned long flags;
3669
3670         if (!q)
3671                 return;
3672
3673         spin_lock_irqsave(q->queue_lock, flags);
3674         blk_run_queue_async(q);
3675         spin_unlock_irqrestore(q->queue_lock, flags);
3676 }
3677
3678 /**
3679  * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3680  * @shost:      scsi host rport attached to
3681  * @job:        bsg job to be processed
3682  */
3683 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3684 {
3685         struct fc_internal *i = to_fc_internal(shost->transportt);
3686         struct fc_bsg_request *bsg_request = job->request;
3687         struct fc_bsg_reply *bsg_reply = job->reply;
3688         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3689         int ret;
3690
3691         /* check if we really have all the request data needed */
3692         if (job->request_len < cmdlen) {
3693                 ret = -ENOMSG;
3694                 goto fail_rport_msg;
3695         }
3696
3697         /* Validate the rport command */
3698         switch (bsg_request->msgcode) {
3699         case FC_BSG_RPT_ELS:
3700                 cmdlen += sizeof(struct fc_bsg_rport_els);
3701                 goto check_bidi;
3702
3703         case FC_BSG_RPT_CT:
3704                 cmdlen += sizeof(struct fc_bsg_rport_ct);
3705 check_bidi:
3706                 /* there better be xmt and rcv payloads */
3707                 if ((!job->request_payload.payload_len) ||
3708                     (!job->reply_payload.payload_len)) {
3709                         ret = -EINVAL;
3710                         goto fail_rport_msg;
3711                 }
3712                 break;
3713         default:
3714                 ret = -EBADR;
3715                 goto fail_rport_msg;
3716         }
3717
3718         ret = i->f->bsg_request(job);
3719         if (!ret)
3720                 return 0;
3721
3722 fail_rport_msg:
3723         /* return the errno failure code as the only status */
3724         BUG_ON(job->reply_len < sizeof(uint32_t));
3725         bsg_reply->reply_payload_rcv_len = 0;
3726         bsg_reply->result = ret;
3727         job->reply_len = sizeof(uint32_t);
3728         bsg_job_done(job, bsg_reply->result,
3729                        bsg_reply->reply_payload_rcv_len);
3730         return 0;
3731 }
3732
3733 static int fc_bsg_dispatch(struct bsg_job *job)
3734 {
3735         struct Scsi_Host *shost = fc_bsg_to_shost(job);
3736
3737         if (scsi_is_fc_rport(job->dev))
3738                 return fc_bsg_rport_dispatch(shost, job);
3739         else
3740                 return fc_bsg_host_dispatch(shost, job);
3741 }
3742
3743 /**
3744  * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3745  * @shost:      shost for fc_host
3746  * @fc_host:    fc_host adding the structures to
3747  */
3748 static int
3749 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3750 {
3751         struct device *dev = &shost->shost_gendev;
3752         struct fc_internal *i = to_fc_internal(shost->transportt);
3753         struct request_queue *q;
3754         char bsg_name[20];
3755
3756         fc_host->rqst_q = NULL;
3757
3758         if (!i->f->bsg_request)
3759                 return -ENOTSUPP;
3760
3761         snprintf(bsg_name, sizeof(bsg_name),
3762                  "fc_host%d", shost->host_no);
3763
3764         q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, i->f->dd_bsg_size);
3765         if (IS_ERR(q)) {
3766                 dev_err(dev,
3767                         "fc_host%d: bsg interface failed to initialize - setup queue\n",
3768                         shost->host_no);
3769                 return PTR_ERR(q);
3770         }
3771         __scsi_init_queue(shost, q);
3772         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3773         blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3774         fc_host->rqst_q = q;
3775         return 0;
3776 }
3777
3778 static int fc_bsg_rport_prep(struct request_queue *q, struct request *req)
3779 {
3780         struct fc_rport *rport = dev_to_rport(q->queuedata);
3781
3782         if (rport->port_state == FC_PORTSTATE_BLOCKED &&
3783             !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3784                 return BLKPREP_DEFER;
3785
3786         if (rport->port_state != FC_PORTSTATE_ONLINE)
3787                 return BLKPREP_KILL;
3788
3789         return BLKPREP_OK;
3790 }
3791
3792 /**
3793  * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3794  * @shost:      shost that rport is attached to
3795  * @rport:      rport that the bsg hooks are being attached to
3796  */
3797 static int
3798 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3799 {
3800         struct device *dev = &rport->dev;
3801         struct fc_internal *i = to_fc_internal(shost->transportt);
3802         struct request_queue *q;
3803
3804         rport->rqst_q = NULL;
3805
3806         if (!i->f->bsg_request)
3807                 return -ENOTSUPP;
3808
3809         q = bsg_setup_queue(dev, NULL, fc_bsg_dispatch, i->f->dd_bsg_size);
3810         if (IS_ERR(q)) {
3811                 dev_err(dev, "failed to setup bsg queue\n");
3812                 return PTR_ERR(q);
3813         }
3814         __scsi_init_queue(shost, q);
3815         blk_queue_prep_rq(q, fc_bsg_rport_prep);
3816         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3817         blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
3818         rport->rqst_q = q;
3819         return 0;
3820 }
3821
3822
3823 /**
3824  * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3825  * @q:  the request_queue that is to be torn down.
3826  *
3827  * Notes:
3828  *   Before unregistering the queue empty any requests that are blocked
3829  *
3830  *
3831  */
3832 static void
3833 fc_bsg_remove(struct request_queue *q)
3834 {
3835         if (q) {
3836                 bsg_unregister_queue(q);
3837                 blk_cleanup_queue(q);
3838         }
3839 }
3840
3841
3842 /* Original Author:  Martin Hicks */
3843 MODULE_AUTHOR("James Smart");
3844 MODULE_DESCRIPTION("FC Transport Attributes");
3845 MODULE_LICENSE("GPL");
3846
3847 module_init(fc_transport_init);
3848 module_exit(fc_transport_exit);