drivers/scsi/scsi_transport_fc.c

   1 /*
   2  *  FiberChannel transport specific attributes exported to sysfs.
   3  *
   4  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ========
  21  *
  22  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
  23  *    Rewrite for host, target, device, and remote port attributes,
  24  *    statistics, and service functions...
  25  *    Add vports, etc
  26  *
  27  */
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32 #include <linux/kernel.h>
  33 #include <scsi/scsi_device.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_transport.h>
  36 #include <scsi/scsi_transport_fc.h>
  37 #include <scsi/scsi_cmnd.h>
  38 #include <net/netlink.h>
  39 #include <scsi/scsi_netlink_fc.h>
  40 #include <scsi/scsi_bsg_fc.h>
  41 #include "scsi_priv.h"
  42 #include "scsi_transport_fc_internal.h"
  43
  44 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
  45 static void fc_vport_sched_delete(struct work_struct *work);
  46 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
  47         struct device *pdev, struct fc_vport_identifiers  *ids,
  48         struct fc_vport **vport);
  49 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
  50 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
  51 static void fc_bsg_remove(struct request_queue *);
  52 static void fc_bsg_goose_queue(struct fc_rport *);
  53
  54 /*
  55  * Module Parameters
  56  */
  57
  58 /*
  59  * dev_loss_tmo: the default number of seconds that the FC transport
  60  *   should insulate the loss of a remote port.
  61  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
  62  */
  63 static unsigned int fc_dev_loss_tmo = 60;               /* seconds */
  64
  65 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
  66 MODULE_PARM_DESC(dev_loss_tmo,
  67                  "Maximum number of seconds that the FC transport should"
  68                  " insulate the loss of a remote port. Once this value is"
  69                  " exceeded, the scsi target is removed. Value should be"
  70                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
  71                  " fast_io_fail_tmo is not set.");
  72
  73 /*
  74  * Redefine so that we can have same named attributes in the
  75  * sdev/starget/host objects.
  76  */
  77 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)                \
  78 struct device_attribute device_attr_##_prefix##_##_name =       \
  79         __ATTR(_name,_mode,_show,_store)
  80
  81 #define fc_enum_name_search(title, table_type, table)                   \
  82 static const char *get_fc_##title##_name(enum table_type table_key)     \
  83 {                                                                       \
  84         int i;                                                          \
  85         char *name = NULL;                                              \
  86                                                                         \
  87         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
  88                 if (table[i].value == table_key) {                      \
  89                         name = table[i].name;                           \
  90                         break;                                          \
  91                 }                                                       \
  92         }                                                               \
  93         return name;                                                    \
  94 }
  95
  96 #define fc_enum_name_match(title, table_type, table)                    \
  97 static int get_fc_##title##_match(const char *table_key,                \
  98                 enum table_type *value)                                 \
  99 {                                                                       \
 100         int i;                                                          \
 101                                                                         \
 102         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
 103                 if (strncmp(table_key, table[i].name,                   \
 104                                 table[i].matchlen) == 0) {              \
 105                         *value = table[i].value;                        \
 106                         return 0; /* success */                         \
 107                 }                                                       \
 108         }                                                               \
 109         return 1; /* failure */                                         \
 110 }
 111
 112
 113 /* Convert fc_port_type values to ascii string name */
 114 static struct {
 115         enum fc_port_type       value;
 116         char                    *name;
 117 } fc_port_type_names[] = {
 118         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
 119         { FC_PORTTYPE_OTHER,            "Other" },
 120         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
 121         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
 122         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
 123         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
 124         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection)" },
 125         { FC_PORTTYPE_NPIV,             "NPIV VPORT" },
 126 };
 127 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
 128 #define FC_PORTTYPE_MAX_NAMELEN         50
 129
 130 /* Reuse fc_port_type enum function for vport_type */
 131 #define get_fc_vport_type_name get_fc_port_type_name
 132
 133
 134 /* Convert fc_host_event_code values to ascii string name */
 135 static const struct {
 136         enum fc_host_event_code         value;
 137         char                            *name;
 138 } fc_host_event_code_names[] = {
 139         { FCH_EVT_LIP,                  "lip" },
 140         { FCH_EVT_LINKUP,               "link_up" },
 141         { FCH_EVT_LINKDOWN,             "link_down" },
 142         { FCH_EVT_LIPRESET,             "lip_reset" },
 143         { FCH_EVT_RSCN,                 "rscn" },
 144         { FCH_EVT_ADAPTER_CHANGE,       "adapter_chg" },
 145         { FCH_EVT_PORT_UNKNOWN,         "port_unknown" },
 146         { FCH_EVT_PORT_ONLINE,          "port_online" },
 147         { FCH_EVT_PORT_OFFLINE,         "port_offline" },
 148         { FCH_EVT_PORT_FABRIC,          "port_fabric" },
 149         { FCH_EVT_LINK_UNKNOWN,         "link_unknown" },
 150         { FCH_EVT_VENDOR_UNIQUE,        "vendor_unique" },
 151 };
 152 fc_enum_name_search(host_event_code, fc_host_event_code,
 153                 fc_host_event_code_names)
 154 #define FC_HOST_EVENT_CODE_MAX_NAMELEN  30
 155
 156
 157 /* Convert fc_port_state values to ascii string name */
 158 static struct {
 159         enum fc_port_state      value;
 160         char                    *name;
 161 } fc_port_state_names[] = {
 162         { FC_PORTSTATE_UNKNOWN,         "Unknown" },
 163         { FC_PORTSTATE_NOTPRESENT,      "Not Present" },
 164         { FC_PORTSTATE_ONLINE,          "Online" },
 165         { FC_PORTSTATE_OFFLINE,         "Offline" },
 166         { FC_PORTSTATE_BLOCKED,         "Blocked" },
 167         { FC_PORTSTATE_BYPASSED,        "Bypassed" },
 168         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics" },
 169         { FC_PORTSTATE_LINKDOWN,        "Linkdown" },
 170         { FC_PORTSTATE_ERROR,           "Error" },
 171         { FC_PORTSTATE_LOOPBACK,        "Loopback" },
 172         { FC_PORTSTATE_DELETED,         "Deleted" },
 173 };
 174 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
 175 #define FC_PORTSTATE_MAX_NAMELEN        20
 176
 177
 178 /* Convert fc_vport_state values to ascii string name */
 179 static struct {
 180         enum fc_vport_state     value;
 181         char                    *name;
 182 } fc_vport_state_names[] = {
 183         { FC_VPORT_UNKNOWN,             "Unknown" },
 184         { FC_VPORT_ACTIVE,              "Active" },
 185         { FC_VPORT_DISABLED,            "Disabled" },
 186         { FC_VPORT_LINKDOWN,            "Linkdown" },
 187         { FC_VPORT_INITIALIZING,        "Initializing" },
 188         { FC_VPORT_NO_FABRIC_SUPP,      "No Fabric Support" },
 189         { FC_VPORT_NO_FABRIC_RSCS,      "No Fabric Resources" },
 190         { FC_VPORT_FABRIC_LOGOUT,       "Fabric Logout" },
 191         { FC_VPORT_FABRIC_REJ_WWN,      "Fabric Rejected WWN" },
 192         { FC_VPORT_FAILED,              "VPort Failed" },
 193 };
 194 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
 195 #define FC_VPORTSTATE_MAX_NAMELEN       24
 196
 197 /* Reuse fc_vport_state enum function for vport_last_state */
 198 #define get_fc_vport_last_state_name get_fc_vport_state_name
 199
 200
 201 /* Convert fc_tgtid_binding_type values to ascii string name */
 202 static const struct {
 203         enum fc_tgtid_binding_type      value;
 204         char                            *name;
 205         int                             matchlen;
 206 } fc_tgtid_binding_type_names[] = {
 207         { FC_TGTID_BIND_NONE, "none", 4 },
 208         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
 209         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
 210         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
 211 };
 212 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
 213                 fc_tgtid_binding_type_names)
 214 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
 215                 fc_tgtid_binding_type_names)
 216 #define FC_BINDTYPE_MAX_NAMELEN 30
 217
 218
 219 #define fc_bitfield_name_search(title, table)                   \
 220 static ssize_t                                                  \
 221 get_fc_##title##_names(u32 table_key, char *buf)                \
 222 {                                                               \
 223         char *prefix = "";                                      \
 224         ssize_t len = 0;                                        \
 225         int i;                                                  \
 226                                                                 \
 227         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 228                 if (table[i].value & table_key) {               \
 229                         len += sprintf(buf + len, "%s%s",       \
 230                                 prefix, table[i].name);         \
 231                         prefix = ", ";                          \
 232                 }                                               \
 233         }                                                       \
 234         len += sprintf(buf + len, "\n");                        \
 235         return len;                                             \
 236 }
 237
 238
 239 /* Convert FC_COS bit values to ascii string name */
 240 static const struct {
 241         u32                     value;
 242         char                    *name;
 243 } fc_cos_names[] = {
 244         { FC_COS_CLASS1,        "Class 1" },
 245         { FC_COS_CLASS2,        "Class 2" },
 246         { FC_COS_CLASS3,        "Class 3" },
 247         { FC_COS_CLASS4,        "Class 4" },
 248         { FC_COS_CLASS6,        "Class 6" },
 249 };
 250 fc_bitfield_name_search(cos, fc_cos_names)
 251
 252
 253 /* Convert FC_PORTSPEED bit values to ascii string name */
 254 static const struct {
 255         u32                     value;
 256         char                    *name;
 257 } fc_port_speed_names[] = {
 258         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
 259         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
 260         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
 261         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
 262         { FC_PORTSPEED_8GBIT,           "8 Gbit" },
 263         { FC_PORTSPEED_16GBIT,          "16 Gbit" },
 264         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
 265 };
 266 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 267
 268
 269 static int
 270 show_fc_fc4s (char *buf, u8 *fc4_list)
 271 {
 272         int i, len=0;
 273
 274         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 275                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 276         len += sprintf(buf + len, "\n");
 277         return len;
 278 }
 279
 280
 281 /* Convert FC_PORT_ROLE bit values to ascii string name */
 282 static const struct {
 283         u32                     value;
 284         char                    *name;
 285 } fc_port_role_names[] = {
 286         { FC_PORT_ROLE_FCP_TARGET,      "FCP Target" },
 287         { FC_PORT_ROLE_FCP_INITIATOR,   "FCP Initiator" },
 288         { FC_PORT_ROLE_IP_PORT,         "IP Port" },
 289 };
 290 fc_bitfield_name_search(port_roles, fc_port_role_names)
 291
 292 /*
 293  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 294  */
 295 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 296 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 297 #define FC_FPORT_PORTID                 0x00000e
 298 #define FC_FABCTLR_PORTID               0x00000d
 299 #define FC_DIRSRVR_PORTID               0x00000c
 300 #define FC_TIMESRVR_PORTID              0x00000b
 301 #define FC_MGMTSRVR_PORTID              0x00000a
 302
 303
 304 static void fc_timeout_deleted_rport(struct work_struct *work);
 305 static void fc_timeout_fail_rport_io(struct work_struct *work);
 306 static void fc_scsi_scan_rport(struct work_struct *work);
 307
 308 /*
 309  * Attribute counts pre object type...
 310  * Increase these values if you add attributes
 311  */
 312 #define FC_STARGET_NUM_ATTRS    3
 313 #define FC_RPORT_NUM_ATTRS      10
 314 #define FC_VPORT_NUM_ATTRS      9
 315 #define FC_HOST_NUM_ATTRS       29
 316
 317 struct fc_internal {
 318         struct scsi_transport_template t;
 319         struct fc_function_template *f;
 320
 321         /*
 322          * For attributes : each object has :
 323          *   An array of the actual attributes structures
 324          *   An array of null-terminated pointers to the attribute
 325          *     structures - used for mid-layer interaction.
 326          *
 327          * The attribute containers for the starget and host are are
 328          * part of the midlayer. As the remote port is specific to the
 329          * fc transport, we must provide the attribute container.
 330          */
 331         struct device_attribute private_starget_attrs[
 332                                                         FC_STARGET_NUM_ATTRS];
 333         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 334
 335         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 336         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 337
 338         struct transport_container rport_attr_cont;
 339         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 340         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 341
 342         struct transport_container vport_attr_cont;
 343         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
 344         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
 345 };
 346
 347 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 348
 349 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 350                            struct device *cdev)
 351 {
 352         struct scsi_target *starget = to_scsi_target(dev);
 353         struct fc_rport *rport = starget_to_rport(starget);
 354
 355         /*
 356          * if parent is remote port, use values from remote port.
 357          * Otherwise, this host uses the fc_transport, but not the
 358          * remote port interface. As such, initialize to known non-values.
 359          */
 360         if (rport) {
 361                 fc_starget_node_name(starget) = rport->node_name;
 362                 fc_starget_port_name(starget) = rport->port_name;
 363                 fc_starget_port_id(starget) = rport->port_id;
 364         } else {
 365                 fc_starget_node_name(starget) = -1;
 366                 fc_starget_port_name(starget) = -1;
 367                 fc_starget_port_id(starget) = -1;
 368         }
 369
 370         return 0;
 371 }
 372
 373 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 374                                "fc_transport",
 375                                fc_target_setup,
 376                                NULL,
 377                                NULL);
 378
 379 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 380                          struct device *cdev)
 381 {
 382         struct Scsi_Host *shost = dev_to_shost(dev);
 383         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 384
 385         /*
 386          * Set default values easily detected by the midlayer as
 387          * failure cases.  The scsi lldd is responsible for initializing
 388          * all transport attributes to valid values per host.
 389          */
 390         fc_host->node_name = -1;
 391         fc_host->port_name = -1;
 392         fc_host->permanent_port_name = -1;
 393         fc_host->supported_classes = FC_COS_UNSPECIFIED;
 394         memset(fc_host->supported_fc4s, 0,
 395                 sizeof(fc_host->supported_fc4s));
 396         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
 397         fc_host->maxframe_size = -1;
 398         fc_host->max_npiv_vports = 0;
 399         memset(fc_host->serial_number, 0,
 400                 sizeof(fc_host->serial_number));
 401         memset(fc_host->manufacturer, 0,
 402                 sizeof(fc_host->manufacturer));
 403         memset(fc_host->model, 0,
 404                 sizeof(fc_host->model));
 405         memset(fc_host->model_description, 0,
 406                 sizeof(fc_host->model_description));
 407         memset(fc_host->hardware_version, 0,
 408                 sizeof(fc_host->hardware_version));
 409         memset(fc_host->driver_version, 0,
 410                 sizeof(fc_host->driver_version));
 411         memset(fc_host->firmware_version, 0,
 412                 sizeof(fc_host->firmware_version));
 413         memset(fc_host->optionrom_version, 0,
 414                 sizeof(fc_host->optionrom_version));
 415
 416         fc_host->port_id = -1;
 417         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
 418         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
 419         memset(fc_host->active_fc4s, 0,
 420                 sizeof(fc_host->active_fc4s));
 421         fc_host->speed = FC_PORTSPEED_UNKNOWN;
 422         fc_host->fabric_name = -1;
 423         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
 424         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
 425
 426         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
 427
 428         INIT_LIST_HEAD(&fc_host->rports);
 429         INIT_LIST_HEAD(&fc_host->rport_bindings);
 430         INIT_LIST_HEAD(&fc_host->vports);
 431         fc_host->next_rport_number = 0;
 432         fc_host->next_target_id = 0;
 433         fc_host->next_vport_number = 0;
 434         fc_host->npiv_vports_inuse = 0;
 435
 436         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
 437                  "fc_wq_%d", shost->host_no);
 438         fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
 439         if (!fc_host->work_q)
 440                 return -ENOMEM;
 441
 442         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
 443         snprintf(fc_host->devloss_work_q_name,
 444                  sizeof(fc_host->devloss_work_q_name),
 445                  "fc_dl_%d", shost->host_no);
 446         fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
 447                                         fc_host->devloss_work_q_name);
 448         if (!fc_host->devloss_work_q) {
 449                 destroy_workqueue(fc_host->work_q);
 450                 fc_host->work_q = NULL;
 451                 return -ENOMEM;
 452         }
 453
 454         fc_bsg_hostadd(shost, fc_host);
 455         /* ignore any bsg add error - we just can't do sgio */
 456
 457         return 0;
 458 }
 459
 460 static int fc_host_remove(struct transport_container *tc, struct device *dev,
 461                          struct device *cdev)
 462 {
 463         struct Scsi_Host *shost = dev_to_shost(dev);
 464         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 465
 466         fc_bsg_remove(fc_host->rqst_q);
 467         return 0;
 468 }
 469
 470 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 471                                "fc_host",
 472                                fc_host_setup,
 473                                fc_host_remove,
 474                                NULL);
 475
 476 /*
 477  * Setup and Remove actions for remote ports are handled
 478  * in the service functions below.
 479  */
 480 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 481                                "fc_remote_ports",
 482                                NULL,
 483                                NULL,
 484                                NULL);
 485
 486 /*
 487  * Setup and Remove actions for virtual ports are handled
 488  * in the service functions below.
 489  */
 490 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
 491                                "fc_vports",
 492                                NULL,
 493                                NULL,
 494                                NULL);
 495
 496 /*
 497  * Netlink Infrastructure
 498  */
 499
 500 static atomic_t fc_event_seq;
 501
 502 /**
 503  * fc_get_event_number - Obtain the next sequential FC event number
 504  *
 505  * Notes:
 506  *   We could have inlined this, but it would have required fc_event_seq to
 507  *   be exposed. For now, live with the subroutine call.
 508  *   Atomic used to avoid lock/unlock...
 509  */
 510 u32
 511 fc_get_event_number(void)
 512 {
 513         return atomic_add_return(1, &fc_event_seq);
 514 }
 515 EXPORT_SYMBOL(fc_get_event_number);
 516
 517
 518 /**
 519  * fc_host_post_event - called to post an even on an fc_host.
 520  * @shost:              host the event occurred on
 521  * @event_number:       fc event number obtained from get_fc_event_number()
 522  * @event_code:         fc_host event being posted
 523  * @event_data:         32bits of data for the event being posted
 524  *
 525  * Notes:
 526  *      This routine assumes no locks are held on entry.
 527  */
 528 void
 529 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 530                 enum fc_host_event_code event_code, u32 event_data)
 531 {
 532         struct sk_buff *skb;
 533         struct nlmsghdr *nlh;
 534         struct fc_nl_event *event;
 535         const char *name;
 536         u32 len;
 537         int err;
 538
 539         if (!scsi_nl_sock) {
 540                 err = -ENOENT;
 541                 goto send_fail;
 542         }
 543
 544         len = FC_NL_MSGALIGN(sizeof(*event));
 545
 546         skb = nlmsg_new(len, GFP_KERNEL);
 547         if (!skb) {
 548                 err = -ENOBUFS;
 549                 goto send_fail;
 550         }
 551
 552         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 553         if (!nlh) {
 554                 err = -ENOBUFS;
 555                 goto send_fail_skb;
 556         }
 557         event = nlmsg_data(nlh);
 558
 559         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 560                                 FC_NL_ASYNC_EVENT, len);
 561         event->seconds = get_seconds();
 562         event->vendor_id = 0;
 563         event->host_no = shost->host_no;
 564         event->event_datalen = sizeof(u32);     /* bytes */
 565         event->event_num = event_number;
 566         event->event_code = event_code;
 567         event->event_data = event_data;
 568
 569         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 570                         GFP_KERNEL);
 571         return;
 572
 573 send_fail_skb:
 574         kfree_skb(skb);
 575 send_fail:
 576         name = get_fc_host_event_code_name(event_code);
 577         printk(KERN_WARNING
 578                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
 579                 __func__, shost->host_no,
 580                 (name) ? name : "<unknown>", event_data, err);
 581         return;
 582 }
 583 EXPORT_SYMBOL(fc_host_post_event);
 584
 585
 586 /**
 587  * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
 588  * @shost:              host the event occurred on
 589  * @event_number:       fc event number obtained from get_fc_event_number()
 590  * @data_len:           amount, in bytes, of vendor unique data
 591  * @data_buf:           pointer to vendor unique data
 592  * @vendor_id:          Vendor id
 593  *
 594  * Notes:
 595  *      This routine assumes no locks are held on entry.
 596  */
 597 void
 598 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 599                 u32 data_len, char * data_buf, u64 vendor_id)
 600 {
 601         struct sk_buff *skb;
 602         struct nlmsghdr *nlh;
 603         struct fc_nl_event *event;
 604         u32 len;
 605         int err;
 606
 607         if (!scsi_nl_sock) {
 608                 err = -ENOENT;
 609                 goto send_vendor_fail;
 610         }
 611
 612         len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
 613
 614         skb = nlmsg_new(len, GFP_KERNEL);
 615         if (!skb) {
 616                 err = -ENOBUFS;
 617                 goto send_vendor_fail;
 618         }
 619
 620         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 621         if (!nlh) {
 622                 err = -ENOBUFS;
 623                 goto send_vendor_fail_skb;
 624         }
 625         event = nlmsg_data(nlh);
 626
 627         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 628                                 FC_NL_ASYNC_EVENT, len);
 629         event->seconds = get_seconds();
 630         event->vendor_id = vendor_id;
 631         event->host_no = shost->host_no;
 632         event->event_datalen = data_len;        /* bytes */
 633         event->event_num = event_number;
 634         event->event_code = FCH_EVT_VENDOR_UNIQUE;
 635         memcpy(&event->event_data, data_buf, data_len);
 636
 637         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 638                         GFP_KERNEL);
 639         return;
 640
 641 send_vendor_fail_skb:
 642         kfree_skb(skb);
 643 send_vendor_fail:
 644         printk(KERN_WARNING
 645                 "%s: Dropped Event : host %d vendor_unique - err %d\n",
 646                 __func__, shost->host_no, err);
 647         return;
 648 }
 649 EXPORT_SYMBOL(fc_host_post_vendor_event);
 650
 651
 652
 653 static __init int fc_transport_init(void)
 654 {
 655         int error;
 656
 657         atomic_set(&fc_event_seq, 0);
 658
 659         error = transport_class_register(&fc_host_class);
 660         if (error)
 661                 return error;
 662         error = transport_class_register(&fc_vport_class);
 663         if (error)
 664                 goto unreg_host_class;
 665         error = transport_class_register(&fc_rport_class);
 666         if (error)
 667                 goto unreg_vport_class;
 668         error = transport_class_register(&fc_transport_class);
 669         if (error)
 670                 goto unreg_rport_class;
 671         return 0;
 672
 673 unreg_rport_class:
 674         transport_class_unregister(&fc_rport_class);
 675 unreg_vport_class:
 676         transport_class_unregister(&fc_vport_class);
 677 unreg_host_class:
 678         transport_class_unregister(&fc_host_class);
 679         return error;
 680 }
 681
 682 static void __exit fc_transport_exit(void)
 683 {
 684         transport_class_unregister(&fc_transport_class);
 685         transport_class_unregister(&fc_rport_class);
 686         transport_class_unregister(&fc_host_class);
 687         transport_class_unregister(&fc_vport_class);
 688 }
 689
 690 /*
 691  * FC Remote Port Attribute Management
 692  */
 693
 694 #define fc_rport_show_function(field, format_string, sz, cast)          \
 695 static ssize_t                                                          \
 696 show_fc_rport_##field (struct device *dev,                              \
 697                        struct device_attribute *attr, char *buf)        \
 698 {                                                                       \
 699         struct fc_rport *rport = transport_class_to_rport(dev);         \
 700         struct Scsi_Host *shost = rport_to_shost(rport);                \
 701         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 702         if ((i->f->get_rport_##field) &&                                \
 703             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 704               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 705               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 706                 i->f->get_rport_##field(rport);                         \
 707         return snprintf(buf, sz, format_string, cast rport->field);     \
 708 }
 709
 710 #define fc_rport_store_function(field)                                  \
 711 static ssize_t                                                          \
 712 store_fc_rport_##field(struct device *dev,                              \
 713                        struct device_attribute *attr,                   \
 714                        const char *buf, size_t count)                   \
 715 {                                                                       \
 716         int val;                                                        \
 717         struct fc_rport *rport = transport_class_to_rport(dev);         \
 718         struct Scsi_Host *shost = rport_to_shost(rport);                \
 719         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 720         char *cp;                                                       \
 721         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
 722             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
 723             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
 724                 return -EBUSY;                                          \
 725         val = simple_strtoul(buf, &cp, 0);                              \
 726         if (*cp && (*cp != '\n'))                                       \
 727                 return -EINVAL;                                         \
 728         i->f->set_rport_##field(rport, val);                            \
 729         return count;                                                   \
 730 }
 731
 732 #define fc_rport_rd_attr(field, format_string, sz)                      \
 733         fc_rport_show_function(field, format_string, sz, )              \
 734 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 735                          show_fc_rport_##field, NULL)
 736
 737 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
 738         fc_rport_show_function(field, format_string, sz, (cast))        \
 739 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 740                           show_fc_rport_##field, NULL)
 741
 742 #define fc_rport_rw_attr(field, format_string, sz)                      \
 743         fc_rport_show_function(field, format_string, sz, )              \
 744         fc_rport_store_function(field)                                  \
 745 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
 746                         show_fc_rport_##field,                          \
 747                         store_fc_rport_##field)
 748
 749
 750 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
 751 static ssize_t                                                          \
 752 show_fc_rport_##field (struct device *dev,                              \
 753                        struct device_attribute *attr, char *buf)        \
 754 {                                                                       \
 755         struct fc_rport *rport = transport_class_to_rport(dev);         \
 756         return snprintf(buf, sz, format_string, cast rport->field);     \
 757 }
 758
 759 #define fc_private_rport_rd_attr(field, format_string, sz)              \
 760         fc_private_rport_show_function(field, format_string, sz, )      \
 761 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 762                          show_fc_rport_##field, NULL)
 763
 764 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
 765         fc_private_rport_show_function(field, format_string, sz, (cast)) \
 766 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 767                           show_fc_rport_##field, NULL)
 768
 769
 770 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
 771 static ssize_t                                                          \
 772 show_fc_rport_##title (struct device *dev,                              \
 773                        struct device_attribute *attr, char *buf)        \
 774 {                                                                       \
 775         struct fc_rport *rport = transport_class_to_rport(dev);         \
 776         const char *name;                                               \
 777         name = get_fc_##title##_name(rport->title);                     \
 778         if (!name)                                                      \
 779                 return -EINVAL;                                         \
 780         return snprintf(buf, maxlen, "%s\n", name);                     \
 781 }                                                                       \
 782 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
 783                         show_fc_rport_##title, NULL)
 784
 785
 786 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
 787         i->private_rport_attrs[count] = device_attr_rport_##field; \
 788         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 789         i->private_rport_attrs[count].store = NULL;                     \
 790         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 791         if (i->f->show_rport_##field)                                   \
 792                 count++
 793
 794 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
 795         i->private_rport_attrs[count] = device_attr_rport_##field; \
 796         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 797         i->private_rport_attrs[count].store = NULL;                     \
 798         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 799         count++
 800
 801 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
 802         i->private_rport_attrs[count] = device_attr_rport_##field; \
 803         if (!i->f->set_rport_##field) {                                 \
 804                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
 805                 i->private_rport_attrs[count].store = NULL;             \
 806         }                                                               \
 807         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 808         if (i->f->show_rport_##field)                                   \
 809                 count++
 810
 811 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
 812 {                                                                       \
 813         i->private_rport_attrs[count] = device_attr_rport_##field; \
 814         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 815         count++;                                                        \
 816 }
 817
 818
 819 /* The FC Transport Remote Port Attributes: */
 820
 821 /* Fixed Remote Port Attributes */
 822
 823 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
 824
 825 static ssize_t
 826 show_fc_rport_supported_classes (struct device *dev,
 827                                  struct device_attribute *attr, char *buf)
 828 {
 829         struct fc_rport *rport = transport_class_to_rport(dev);
 830         if (rport->supported_classes == FC_COS_UNSPECIFIED)
 831                 return snprintf(buf, 20, "unspecified\n");
 832         return get_fc_cos_names(rport->supported_classes, buf);
 833 }
 834 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
 835                 show_fc_rport_supported_classes, NULL);
 836
 837 /* Dynamic Remote Port Attributes */
 838
 839 /*
 840  * dev_loss_tmo attribute
 841  */
 842 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
 843 {
 844         char *cp;
 845
 846         *val = simple_strtoul(buf, &cp, 0);
 847         if ((*cp && (*cp != '\n')) || (*val < 0))
 848                 return -EINVAL;
 849         /*
 850          * Check for overflow; dev_loss_tmo is u32
 851          */
 852         if (*val > UINT_MAX)
 853                 return -EINVAL;
 854
 855         return 0;
 856 }
 857
 858 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
 859                                      unsigned long val)
 860 {
 861         struct Scsi_Host *shost = rport_to_shost(rport);
 862         struct fc_internal *i = to_fc_internal(shost->transportt);
 863
 864         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 865             (rport->port_state == FC_PORTSTATE_DELETED) ||
 866             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 867                 return -EBUSY;
 868         /*
 869          * Check for overflow; dev_loss_tmo is u32
 870          */
 871         if (val > UINT_MAX)
 872                 return -EINVAL;
 873
 874         /*
 875          * If fast_io_fail is off we have to cap
 876          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
 877          */
 878         if (rport->fast_io_fail_tmo == -1 &&
 879             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
 880                 return -EINVAL;
 881
 882         i->f->set_rport_dev_loss_tmo(rport, val);
 883         return 0;
 884 }
 885
 886 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
 887 static ssize_t
 888 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 889                             const char *buf, size_t count)
 890 {
 891         struct fc_rport *rport = transport_class_to_rport(dev);
 892         unsigned long val;
 893         int rc;
 894
 895         rc = fc_str_to_dev_loss(buf, &val);
 896         if (rc)
 897                 return rc;
 898
 899         rc = fc_rport_set_dev_loss_tmo(rport, val);
 900         if (rc)
 901                 return rc;
 902         return count;
 903 }
 904 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
 905                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
 906
 907
 908 /* Private Remote Port Attributes */
 909
 910 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 911 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 912 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
 913
 914 static ssize_t
 915 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
 916                      char *buf)
 917 {
 918         struct fc_rport *rport = transport_class_to_rport(dev);
 919
 920         /* identify any roles that are port_id specific */
 921         if ((rport->port_id != -1) &&
 922             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
 923                                         FC_WELLKNOWN_PORTID_MASK) {
 924                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
 925                 case FC_FPORT_PORTID:
 926                         return snprintf(buf, 30, "Fabric Port\n");
 927                 case FC_FABCTLR_PORTID:
 928                         return snprintf(buf, 30, "Fabric Controller\n");
 929                 case FC_DIRSRVR_PORTID:
 930                         return snprintf(buf, 30, "Directory Server\n");
 931                 case FC_TIMESRVR_PORTID:
 932                         return snprintf(buf, 30, "Time Server\n");
 933                 case FC_MGMTSRVR_PORTID:
 934                         return snprintf(buf, 30, "Management Server\n");
 935                 default:
 936                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
 937                 }
 938         } else {
 939                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
 940                         return snprintf(buf, 20, "unknown\n");
 941                 return get_fc_port_roles_names(rport->roles, buf);
 942         }
 943 }
 944 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
 945                 show_fc_rport_roles, NULL);
 946
 947 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 948 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
 949
 950 /*
 951  * fast_io_fail_tmo attribute
 952  */
 953 static ssize_t
 954 show_fc_rport_fast_io_fail_tmo (struct device *dev,
 955                                 struct device_attribute *attr, char *buf)
 956 {
 957         struct fc_rport *rport = transport_class_to_rport(dev);
 958
 959         if (rport->fast_io_fail_tmo == -1)
 960                 return snprintf(buf, 5, "off\n");
 961         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
 962 }
 963
 964 static ssize_t
 965 store_fc_rport_fast_io_fail_tmo(struct device *dev,
 966                                 struct device_attribute *attr, const char *buf,
 967                                 size_t count)
 968 {
 969         int val;
 970         char *cp;
 971         struct fc_rport *rport = transport_class_to_rport(dev);
 972
 973         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 974             (rport->port_state == FC_PORTSTATE_DELETED) ||
 975             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 976                 return -EBUSY;
 977         if (strncmp(buf, "off", 3) == 0)
 978                 rport->fast_io_fail_tmo = -1;
 979         else {
 980                 val = simple_strtoul(buf, &cp, 0);
 981                 if ((*cp && (*cp != '\n')) || (val < 0))
 982                         return -EINVAL;
 983                 /*
 984                  * Cap fast_io_fail by dev_loss_tmo or
 985                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 986                  */
 987                 if ((val >= rport->dev_loss_tmo) ||
 988                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
 989                         return -EINVAL;
 990
 991                 rport->fast_io_fail_tmo = val;
 992         }
 993         return count;
 994 }
 995 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
 996         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
 997
 998
 999 /*
1000  * FC SCSI Target Attribute Management
1001  */
1002
1003 /*
1004  * Note: in the target show function we recognize when the remote
1005  *  port is in the hierarchy and do not allow the driver to get
1006  *  involved in sysfs functions. The driver only gets involved if
1007  *  it's the "old" style that doesn't use rports.
1008  */
1009 #define fc_starget_show_function(field, format_string, sz, cast)        \
1010 static ssize_t                                                          \
1011 show_fc_starget_##field (struct device *dev,                            \
1012                          struct device_attribute *attr, char *buf)      \
1013 {                                                                       \
1014         struct scsi_target *starget = transport_class_to_starget(dev);  \
1015         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1016         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1017         struct fc_rport *rport = starget_to_rport(starget);             \
1018         if (rport)                                                      \
1019                 fc_starget_##field(starget) = rport->field;             \
1020         else if (i->f->get_starget_##field)                             \
1021                 i->f->get_starget_##field(starget);                     \
1022         return snprintf(buf, sz, format_string,                         \
1023                 cast fc_starget_##field(starget));                      \
1024 }
1025
1026 #define fc_starget_rd_attr(field, format_string, sz)                    \
1027         fc_starget_show_function(field, format_string, sz, )            \
1028 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1029                          show_fc_starget_##field, NULL)
1030
1031 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1032         fc_starget_show_function(field, format_string, sz, (cast))      \
1033 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1034                           show_fc_starget_##field, NULL)
1035
1036 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1037         i->private_starget_attrs[count] = device_attr_starget_##field; \
1038         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1039         i->private_starget_attrs[count].store = NULL;                   \
1040         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1041         if (i->f->show_starget_##field)                                 \
1042                 count++
1043
1044 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1045         i->private_starget_attrs[count] = device_attr_starget_##field; \
1046         if (!i->f->set_starget_##field) {                               \
1047                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1048                 i->private_starget_attrs[count].store = NULL;           \
1049         }                                                               \
1050         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1051         if (i->f->show_starget_##field)                                 \
1052                 count++
1053
1054 /* The FC Transport SCSI Target Attributes: */
1055 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1056 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1057 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1058
1059
1060 /*
1061  * FC Virtual Port Attribute Management
1062  */
1063
1064 #define fc_vport_show_function(field, format_string, sz, cast)          \
1065 static ssize_t                                                          \
1066 show_fc_vport_##field (struct device *dev,                              \
1067                        struct device_attribute *attr, char *buf)        \
1068 {                                                                       \
1069         struct fc_vport *vport = transport_class_to_vport(dev);         \
1070         struct Scsi_Host *shost = vport_to_shost(vport);                \
1071         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1072         if ((i->f->get_vport_##field) &&                                \
1073             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1074                 i->f->get_vport_##field(vport);                         \
1075         return snprintf(buf, sz, format_string, cast vport->field);     \
1076 }
1077
1078 #define fc_vport_store_function(field)                                  \
1079 static ssize_t                                                          \
1080 store_fc_vport_##field(struct device *dev,                              \
1081                        struct device_attribute *attr,                   \
1082                        const char *buf, size_t count)                   \
1083 {                                                                       \
1084         int val;                                                        \
1085         struct fc_vport *vport = transport_class_to_vport(dev);         \
1086         struct Scsi_Host *shost = vport_to_shost(vport);                \
1087         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1088         char *cp;                                                       \
1089         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1090                 return -EBUSY;                                          \
1091         val = simple_strtoul(buf, &cp, 0);                              \
1092         if (*cp && (*cp != '\n'))                                       \
1093                 return -EINVAL;                                         \
1094         i->f->set_vport_##field(vport, val);                            \
1095         return count;                                                   \
1096 }
1097
1098 #define fc_vport_store_str_function(field, slen)                        \
1099 static ssize_t                                                          \
1100 store_fc_vport_##field(struct device *dev,                              \
1101                        struct device_attribute *attr,                   \
1102                        const char *buf, size_t count)                   \
1103 {                                                                       \
1104         struct fc_vport *vport = transport_class_to_vport(dev);         \
1105         struct Scsi_Host *shost = vport_to_shost(vport);                \
1106         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1107         unsigned int cnt=count;                                         \
1108                                                                         \
1109         /* count may include a LF at end of string */                   \
1110         if (buf[cnt-1] == '\n')                                         \
1111                 cnt--;                                                  \
1112         if (cnt > ((slen) - 1))                                         \
1113                 return -EINVAL;                                         \
1114         memcpy(vport->field, buf, cnt);                                 \
1115         i->f->set_vport_##field(vport);                                 \
1116         return count;                                                   \
1117 }
1118
1119 #define fc_vport_rd_attr(field, format_string, sz)                      \
1120         fc_vport_show_function(field, format_string, sz, )              \
1121 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1122                          show_fc_vport_##field, NULL)
1123
1124 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1125         fc_vport_show_function(field, format_string, sz, (cast))        \
1126 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1127                           show_fc_vport_##field, NULL)
1128
1129 #define fc_vport_rw_attr(field, format_string, sz)                      \
1130         fc_vport_show_function(field, format_string, sz, )              \
1131         fc_vport_store_function(field)                                  \
1132 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1133                         show_fc_vport_##field,                          \
1134                         store_fc_vport_##field)
1135
1136 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1137 static ssize_t                                                          \
1138 show_fc_vport_##field (struct device *dev,                              \
1139                        struct device_attribute *attr, char *buf)        \
1140 {                                                                       \
1141         struct fc_vport *vport = transport_class_to_vport(dev);         \
1142         return snprintf(buf, sz, format_string, cast vport->field);     \
1143 }
1144
1145 #define fc_private_vport_store_u32_function(field)                      \
1146 static ssize_t                                                          \
1147 store_fc_vport_##field(struct device *dev,                              \
1148                        struct device_attribute *attr,                   \
1149                        const char *buf, size_t count)                   \
1150 {                                                                       \
1151         u32 val;                                                        \
1152         struct fc_vport *vport = transport_class_to_vport(dev);         \
1153         char *cp;                                                       \
1154         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1155                 return -EBUSY;                                          \
1156         val = simple_strtoul(buf, &cp, 0);                              \
1157         if (*cp && (*cp != '\n'))                                       \
1158                 return -EINVAL;                                         \
1159         vport->field = val;                                             \
1160         return count;                                                   \
1161 }
1162
1163
1164 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1165         fc_private_vport_show_function(field, format_string, sz, )      \
1166 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1167                          show_fc_vport_##field, NULL)
1168
1169 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1170         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1171 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1172                           show_fc_vport_##field, NULL)
1173
1174 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1175         fc_private_vport_show_function(field, format_string, sz, )      \
1176         fc_private_vport_store_u32_function(field)                      \
1177 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1178                         show_fc_vport_##field,                          \
1179                         store_fc_vport_##field)
1180
1181
1182 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1183 static ssize_t                                                          \
1184 show_fc_vport_##title (struct device *dev,                              \
1185                        struct device_attribute *attr,                   \
1186                        char *buf)                                       \
1187 {                                                                       \
1188         struct fc_vport *vport = transport_class_to_vport(dev);         \
1189         const char *name;                                               \
1190         name = get_fc_##title##_name(vport->title);                     \
1191         if (!name)                                                      \
1192                 return -EINVAL;                                         \
1193         return snprintf(buf, maxlen, "%s\n", name);                     \
1194 }                                                                       \
1195 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1196                         show_fc_vport_##title, NULL)
1197
1198
1199 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1200         i->private_vport_attrs[count] = device_attr_vport_##field; \
1201         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1202         i->private_vport_attrs[count].store = NULL;                     \
1203         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1204         if (i->f->get_##field)                                          \
1205                 count++
1206         /* NOTE: Above MACRO differs: checks function not show bit */
1207
1208 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1209         i->private_vport_attrs[count] = device_attr_vport_##field; \
1210         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1211         i->private_vport_attrs[count].store = NULL;                     \
1212         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1213         count++
1214
1215 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1216         i->private_vport_attrs[count] = device_attr_vport_##field; \
1217         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1218         if (i->f->field)                                                \
1219                 count++
1220         /* NOTE: Above MACRO differs: checks function */
1221
1222 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1223         i->private_vport_attrs[count] = device_attr_vport_##field; \
1224         if (!i->f->set_vport_##field) {                                 \
1225                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1226                 i->private_vport_attrs[count].store = NULL;             \
1227         }                                                               \
1228         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1229         count++
1230         /* NOTE: Above MACRO differs: does not check show bit */
1231
1232 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1233 {                                                                       \
1234         i->private_vport_attrs[count] = device_attr_vport_##field; \
1235         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1236         count++;                                                        \
1237 }
1238
1239
1240 /* The FC Transport Virtual Port Attributes: */
1241
1242 /* Fixed Virtual Port Attributes */
1243
1244 /* Dynamic Virtual Port Attributes */
1245
1246 /* Private Virtual Port Attributes */
1247
1248 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1249 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1250 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1251 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1252
1253 static ssize_t
1254 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1255                      char *buf)
1256 {
1257         struct fc_vport *vport = transport_class_to_vport(dev);
1258
1259         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1260                 return snprintf(buf, 20, "unknown\n");
1261         return get_fc_port_roles_names(vport->roles, buf);
1262 }
1263 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1264
1265 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1266
1267 fc_private_vport_show_function(symbolic_name, "%s\n",
1268                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1269 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1270 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1271                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1272
1273 static ssize_t
1274 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1275                       const char *buf, size_t count)
1276 {
1277         struct fc_vport *vport = transport_class_to_vport(dev);
1278         struct Scsi_Host *shost = vport_to_shost(vport);
1279         unsigned long flags;
1280
1281         spin_lock_irqsave(shost->host_lock, flags);
1282         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1283                 spin_unlock_irqrestore(shost->host_lock, flags);
1284                 return -EBUSY;
1285         }
1286         vport->flags |= FC_VPORT_DELETING;
1287         spin_unlock_irqrestore(shost->host_lock, flags);
1288
1289         fc_queue_work(shost, &vport->vport_delete_work);
1290         return count;
1291 }
1292 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1293                         NULL, store_fc_vport_delete);
1294
1295
1296 /*
1297  * Enable/Disable vport
1298  *  Write "1" to disable, write "0" to enable
1299  */
1300 static ssize_t
1301 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1302                        const char *buf,
1303                            size_t count)
1304 {
1305         struct fc_vport *vport = transport_class_to_vport(dev);
1306         struct Scsi_Host *shost = vport_to_shost(vport);
1307         struct fc_internal *i = to_fc_internal(shost->transportt);
1308         int stat;
1309
1310         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1311                 return -EBUSY;
1312
1313         if (*buf == '0') {
1314                 if (vport->vport_state != FC_VPORT_DISABLED)
1315                         return -EALREADY;
1316         } else if (*buf == '1') {
1317                 if (vport->vport_state == FC_VPORT_DISABLED)
1318                         return -EALREADY;
1319         } else
1320                 return -EINVAL;
1321
1322         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1323         return stat ? stat : count;
1324 }
1325 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1326                         NULL, store_fc_vport_disable);
1327
1328
1329 /*
1330  * Host Attribute Management
1331  */
1332
1333 #define fc_host_show_function(field, format_string, sz, cast)           \
1334 static ssize_t                                                          \
1335 show_fc_host_##field (struct device *dev,                               \
1336                       struct device_attribute *attr, char *buf)         \
1337 {                                                                       \
1338         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1339         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1340         if (i->f->get_host_##field)                                     \
1341                 i->f->get_host_##field(shost);                          \
1342         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1343 }
1344
1345 #define fc_host_store_function(field)                                   \
1346 static ssize_t                                                          \
1347 store_fc_host_##field(struct device *dev,                               \
1348                       struct device_attribute *attr,                    \
1349                       const char *buf,  size_t count)                   \
1350 {                                                                       \
1351         int val;                                                        \
1352         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1353         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1354         char *cp;                                                       \
1355                                                                         \
1356         val = simple_strtoul(buf, &cp, 0);                              \
1357         if (*cp && (*cp != '\n'))                                       \
1358                 return -EINVAL;                                         \
1359         i->f->set_host_##field(shost, val);                             \
1360         return count;                                                   \
1361 }
1362
1363 #define fc_host_store_str_function(field, slen)                         \
1364 static ssize_t                                                          \
1365 store_fc_host_##field(struct device *dev,                               \
1366                       struct device_attribute *attr,                    \
1367                       const char *buf, size_t count)                    \
1368 {                                                                       \
1369         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1370         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1371         unsigned int cnt=count;                                         \
1372                                                                         \
1373         /* count may include a LF at end of string */                   \
1374         if (buf[cnt-1] == '\n')                                         \
1375                 cnt--;                                                  \
1376         if (cnt > ((slen) - 1))                                         \
1377                 return -EINVAL;                                         \
1378         memcpy(fc_host_##field(shost), buf, cnt);                       \
1379         i->f->set_host_##field(shost);                                  \
1380         return count;                                                   \
1381 }
1382
1383 #define fc_host_rd_attr(field, format_string, sz)                       \
1384         fc_host_show_function(field, format_string, sz, )               \
1385 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1386                          show_fc_host_##field, NULL)
1387
1388 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1389         fc_host_show_function(field, format_string, sz, (cast))         \
1390 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1391                           show_fc_host_##field, NULL)
1392
1393 #define fc_host_rw_attr(field, format_string, sz)                       \
1394         fc_host_show_function(field, format_string, sz, )               \
1395         fc_host_store_function(field)                                   \
1396 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1397                         show_fc_host_##field,                           \
1398                         store_fc_host_##field)
1399
1400 #define fc_host_rd_enum_attr(title, maxlen)                             \
1401 static ssize_t                                                          \
1402 show_fc_host_##title (struct device *dev,                               \
1403                       struct device_attribute *attr, char *buf)         \
1404 {                                                                       \
1405         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1406         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1407         const char *name;                                               \
1408         if (i->f->get_host_##title)                                     \
1409                 i->f->get_host_##title(shost);                          \
1410         name = get_fc_##title##_name(fc_host_##title(shost));           \
1411         if (!name)                                                      \
1412                 return -EINVAL;                                         \
1413         return snprintf(buf, maxlen, "%s\n", name);                     \
1414 }                                                                       \
1415 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1416
1417 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1418         i->private_host_attrs[count] = device_attr_host_##field;        \
1419         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1420         i->private_host_attrs[count].store = NULL;                      \
1421         i->host_attrs[count] = &i->private_host_attrs[count];           \
1422         if (i->f->show_host_##field)                                    \
1423                 count++
1424
1425 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1426         i->private_host_attrs[count] = device_attr_host_##field;        \
1427         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1428         i->private_host_attrs[count].store = NULL;                      \
1429         i->host_attrs[count] = &i->private_host_attrs[count];           \
1430         count++
1431
1432 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1433         i->private_host_attrs[count] = device_attr_host_##field;        \
1434         if (!i->f->set_host_##field) {                                  \
1435                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1436                 i->private_host_attrs[count].store = NULL;              \
1437         }                                                               \
1438         i->host_attrs[count] = &i->private_host_attrs[count];           \
1439         if (i->f->show_host_##field)                                    \
1440                 count++
1441
1442
1443 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1444 static ssize_t                                                          \
1445 show_fc_host_##field (struct device *dev,                               \
1446                       struct device_attribute *attr, char *buf)         \
1447 {                                                                       \
1448         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1449         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1450 }
1451
1452 #define fc_private_host_rd_attr(field, format_string, sz)               \
1453         fc_private_host_show_function(field, format_string, sz, )       \
1454 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1455                          show_fc_host_##field, NULL)
1456
1457 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1458         fc_private_host_show_function(field, format_string, sz, (cast)) \
1459 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1460                           show_fc_host_##field, NULL)
1461
1462 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1463         i->private_host_attrs[count] = device_attr_host_##field;        \
1464         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1465         i->private_host_attrs[count].store = NULL;                      \
1466         i->host_attrs[count] = &i->private_host_attrs[count];           \
1467         count++
1468
1469 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1470 {                                                                       \
1471         i->private_host_attrs[count] = device_attr_host_##field;        \
1472         i->host_attrs[count] = &i->private_host_attrs[count];           \
1473         count++;                                                        \
1474 }
1475
1476
1477 /* Fixed Host Attributes */
1478
1479 static ssize_t
1480 show_fc_host_supported_classes (struct device *dev,
1481                                 struct device_attribute *attr, char *buf)
1482 {
1483         struct Scsi_Host *shost = transport_class_to_shost(dev);
1484
1485         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1486                 return snprintf(buf, 20, "unspecified\n");
1487
1488         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1489 }
1490 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1491                 show_fc_host_supported_classes, NULL);
1492
1493 static ssize_t
1494 show_fc_host_supported_fc4s (struct device *dev,
1495                              struct device_attribute *attr, char *buf)
1496 {
1497         struct Scsi_Host *shost = transport_class_to_shost(dev);
1498         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1499 }
1500 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1501                 show_fc_host_supported_fc4s, NULL);
1502
1503 static ssize_t
1504 show_fc_host_supported_speeds (struct device *dev,
1505                                struct device_attribute *attr, char *buf)
1506 {
1507         struct Scsi_Host *shost = transport_class_to_shost(dev);
1508
1509         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1510                 return snprintf(buf, 20, "unknown\n");
1511
1512         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1513 }
1514 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1515                 show_fc_host_supported_speeds, NULL);
1516
1517
1518 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1519 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1520 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1521                              unsigned long long);
1522 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1523 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1524 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1525 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1526 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1527 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1528 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1529 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1530 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1531 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1532
1533
1534 /* Dynamic Host Attributes */
1535
1536 static ssize_t
1537 show_fc_host_active_fc4s (struct device *dev,
1538                           struct device_attribute *attr, char *buf)
1539 {
1540         struct Scsi_Host *shost = transport_class_to_shost(dev);
1541         struct fc_internal *i = to_fc_internal(shost->transportt);
1542
1543         if (i->f->get_host_active_fc4s)
1544                 i->f->get_host_active_fc4s(shost);
1545
1546         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1547 }
1548 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1549                 show_fc_host_active_fc4s, NULL);
1550
1551 static ssize_t
1552 show_fc_host_speed (struct device *dev,
1553                     struct device_attribute *attr, char *buf)
1554 {
1555         struct Scsi_Host *shost = transport_class_to_shost(dev);
1556         struct fc_internal *i = to_fc_internal(shost->transportt);
1557
1558         if (i->f->get_host_speed)
1559                 i->f->get_host_speed(shost);
1560
1561         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1562                 return snprintf(buf, 20, "unknown\n");
1563
1564         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1565 }
1566 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1567                 show_fc_host_speed, NULL);
1568
1569
1570 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1571 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1572 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1573 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1574 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1575
1576 fc_private_host_show_function(system_hostname, "%s\n",
1577                 FC_SYMBOLIC_NAME_SIZE + 1, )
1578 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1579 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1580                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1581
1582
1583 /* Private Host Attributes */
1584
1585 static ssize_t
1586 show_fc_private_host_tgtid_bind_type(struct device *dev,
1587                                      struct device_attribute *attr, char *buf)
1588 {
1589         struct Scsi_Host *shost = transport_class_to_shost(dev);
1590         const char *name;
1591
1592         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1593         if (!name)
1594                 return -EINVAL;
1595         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1596 }
1597
1598 #define get_list_head_entry(pos, head, member)          \
1599         pos = list_entry((head)->next, typeof(*pos), member)
1600
1601 static ssize_t
1602 store_fc_private_host_tgtid_bind_type(struct device *dev,
1603         struct device_attribute *attr, const char *buf, size_t count)
1604 {
1605         struct Scsi_Host *shost = transport_class_to_shost(dev);
1606         struct fc_rport *rport;
1607         enum fc_tgtid_binding_type val;
1608         unsigned long flags;
1609
1610         if (get_fc_tgtid_bind_type_match(buf, &val))
1611                 return -EINVAL;
1612
1613         /* if changing bind type, purge all unused consistent bindings */
1614         if (val != fc_host_tgtid_bind_type(shost)) {
1615                 spin_lock_irqsave(shost->host_lock, flags);
1616                 while (!list_empty(&fc_host_rport_bindings(shost))) {
1617                         get_list_head_entry(rport,
1618                                 &fc_host_rport_bindings(shost), peers);
1619                         list_del(&rport->peers);
1620                         rport->port_state = FC_PORTSTATE_DELETED;
1621                         fc_queue_work(shost, &rport->rport_delete_work);
1622                 }
1623                 spin_unlock_irqrestore(shost->host_lock, flags);
1624         }
1625
1626         fc_host_tgtid_bind_type(shost) = val;
1627         return count;
1628 }
1629
1630 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1631                         show_fc_private_host_tgtid_bind_type,
1632                         store_fc_private_host_tgtid_bind_type);
1633
1634 static ssize_t
1635 store_fc_private_host_issue_lip(struct device *dev,
1636         struct device_attribute *attr, const char *buf, size_t count)
1637 {
1638         struct Scsi_Host *shost = transport_class_to_shost(dev);
1639         struct fc_internal *i = to_fc_internal(shost->transportt);
1640         int ret;
1641
1642         /* ignore any data value written to the attribute */
1643         if (i->f->issue_fc_host_lip) {
1644                 ret = i->f->issue_fc_host_lip(shost);
1645                 return ret ? ret: count;
1646         }
1647
1648         return -ENOENT;
1649 }
1650
1651 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1652                         store_fc_private_host_issue_lip);
1653
1654 static ssize_t
1655 store_fc_private_host_dev_loss_tmo(struct device *dev,
1656                                    struct device_attribute *attr,
1657                                    const char *buf, size_t count)
1658 {
1659         struct Scsi_Host *shost = transport_class_to_shost(dev);
1660         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1661         struct fc_rport *rport;
1662         unsigned long val, flags;
1663         int rc;
1664
1665         rc = fc_str_to_dev_loss(buf, &val);
1666         if (rc)
1667                 return rc;
1668
1669         fc_host_dev_loss_tmo(shost) = val;
1670         spin_lock_irqsave(shost->host_lock, flags);
1671         list_for_each_entry(rport, &fc_host->rports, peers)
1672                 fc_rport_set_dev_loss_tmo(rport, val);
1673         spin_unlock_irqrestore(shost->host_lock, flags);
1674         return count;
1675 }
1676
1677 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1678 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1679                       show_fc_host_dev_loss_tmo,
1680                       store_fc_private_host_dev_loss_tmo);
1681
1682 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1683
1684 /*
1685  * Host Statistics Management
1686  */
1687
1688 /* Show a given an attribute in the statistics group */
1689 static ssize_t
1690 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1691 {
1692         struct Scsi_Host *shost = transport_class_to_shost(dev);
1693         struct fc_internal *i = to_fc_internal(shost->transportt);
1694         struct fc_host_statistics *stats;
1695         ssize_t ret = -ENOENT;
1696
1697         if (offset > sizeof(struct fc_host_statistics) ||
1698             offset % sizeof(u64) != 0)
1699                 WARN_ON(1);
1700
1701         if (i->f->get_fc_host_stats) {
1702                 stats = (i->f->get_fc_host_stats)(shost);
1703                 if (stats)
1704                         ret = snprintf(buf, 20, "0x%llx\n",
1705                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1706         }
1707         return ret;
1708 }
1709
1710
1711 /* generate a read-only statistics attribute */
1712 #define fc_host_statistic(name)                                         \
1713 static ssize_t show_fcstat_##name(struct device *cd,                    \
1714                                   struct device_attribute *attr,        \
1715                                   char *buf)                            \
1716 {                                                                       \
1717         return fc_stat_show(cd, buf,                                    \
1718                             offsetof(struct fc_host_statistics, name)); \
1719 }                                                                       \
1720 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1721
1722 fc_host_statistic(seconds_since_last_reset);
1723 fc_host_statistic(tx_frames);
1724 fc_host_statistic(tx_words);
1725 fc_host_statistic(rx_frames);
1726 fc_host_statistic(rx_words);
1727 fc_host_statistic(lip_count);
1728 fc_host_statistic(nos_count);
1729 fc_host_statistic(error_frames);
1730 fc_host_statistic(dumped_frames);
1731 fc_host_statistic(link_failure_count);
1732 fc_host_statistic(loss_of_sync_count);
1733 fc_host_statistic(loss_of_signal_count);
1734 fc_host_statistic(prim_seq_protocol_err_count);
1735 fc_host_statistic(invalid_tx_word_count);
1736 fc_host_statistic(invalid_crc_count);
1737 fc_host_statistic(fcp_input_requests);
1738 fc_host_statistic(fcp_output_requests);
1739 fc_host_statistic(fcp_control_requests);
1740 fc_host_statistic(fcp_input_megabytes);
1741 fc_host_statistic(fcp_output_megabytes);
1742 fc_host_statistic(fcp_packet_alloc_failures);
1743 fc_host_statistic(fcp_packet_aborts);
1744 fc_host_statistic(fcp_frame_alloc_failures);
1745 fc_host_statistic(fc_no_free_exch);
1746 fc_host_statistic(fc_no_free_exch_xid);
1747 fc_host_statistic(fc_xid_not_found);
1748 fc_host_statistic(fc_xid_busy);
1749 fc_host_statistic(fc_seq_not_found);
1750 fc_host_statistic(fc_non_bls_resp);
1751
1752 static ssize_t
1753 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1754                     const char *buf, size_t count)
1755 {
1756         struct Scsi_Host *shost = transport_class_to_shost(dev);
1757         struct fc_internal *i = to_fc_internal(shost->transportt);
1758
1759         /* ignore any data value written to the attribute */
1760         if (i->f->reset_fc_host_stats) {
1761                 i->f->reset_fc_host_stats(shost);
1762                 return count;
1763         }
1764
1765         return -ENOENT;
1766 }
1767 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1768                                 fc_reset_statistics);
1769
1770 static struct attribute *fc_statistics_attrs[] = {
1771         &device_attr_host_seconds_since_last_reset.attr,
1772         &device_attr_host_tx_frames.attr,
1773         &device_attr_host_tx_words.attr,
1774         &device_attr_host_rx_frames.attr,
1775         &device_attr_host_rx_words.attr,
1776         &device_attr_host_lip_count.attr,
1777         &device_attr_host_nos_count.attr,
1778         &device_attr_host_error_frames.attr,
1779         &device_attr_host_dumped_frames.attr,
1780         &device_attr_host_link_failure_count.attr,
1781         &device_attr_host_loss_of_sync_count.attr,
1782         &device_attr_host_loss_of_signal_count.attr,
1783         &device_attr_host_prim_seq_protocol_err_count.attr,
1784         &device_attr_host_invalid_tx_word_count.attr,
1785         &device_attr_host_invalid_crc_count.attr,
1786         &device_attr_host_fcp_input_requests.attr,
1787         &device_attr_host_fcp_output_requests.attr,
1788         &device_attr_host_fcp_control_requests.attr,
1789         &device_attr_host_fcp_input_megabytes.attr,
1790         &device_attr_host_fcp_output_megabytes.attr,
1791         &device_attr_host_fcp_packet_alloc_failures.attr,
1792         &device_attr_host_fcp_packet_aborts.attr,
1793         &device_attr_host_fcp_frame_alloc_failures.attr,
1794         &device_attr_host_fc_no_free_exch.attr,
1795         &device_attr_host_fc_no_free_exch_xid.attr,
1796         &device_attr_host_fc_xid_not_found.attr,
1797         &device_attr_host_fc_xid_busy.attr,
1798         &device_attr_host_fc_seq_not_found.attr,
1799         &device_attr_host_fc_non_bls_resp.attr,
1800         &device_attr_host_reset_statistics.attr,
1801         NULL
1802 };
1803
1804 static struct attribute_group fc_statistics_group = {
1805         .name = "statistics",
1806         .attrs = fc_statistics_attrs,
1807 };
1808
1809
1810 /* Host Vport Attributes */
1811
1812 static int
1813 fc_parse_wwn(const char *ns, u64 *nm)
1814 {
1815         unsigned int i, j;
1816         u8 wwn[8];
1817
1818         memset(wwn, 0, sizeof(wwn));
1819
1820         /* Validate and store the new name */
1821         for (i=0, j=0; i < 16; i++) {
1822                 int value;
1823
1824                 value = hex_to_bin(*ns++);
1825                 if (value >= 0)
1826                         j = (j << 4) | value;
1827                 else
1828                         return -EINVAL;
1829                 if (i % 2) {
1830                         wwn[i/2] = j & 0xff;
1831                         j = 0;
1832                 }
1833         }
1834
1835         *nm = wwn_to_u64(wwn);
1836
1837         return 0;
1838 }
1839
1840
1841 /*
1842  * "Short-cut" sysfs variable to create a new vport on a FC Host.
1843  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1844  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1845  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1846  */
1847 static ssize_t
1848 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1849                            const char *buf, size_t count)
1850 {
1851         struct Scsi_Host *shost = transport_class_to_shost(dev);
1852         struct fc_vport_identifiers vid;
1853         struct fc_vport *vport;
1854         unsigned int cnt=count;
1855         int stat;
1856
1857         memset(&vid, 0, sizeof(vid));
1858
1859         /* count may include a LF at end of string */
1860         if (buf[cnt-1] == '\n')
1861                 cnt--;
1862
1863         /* validate we have enough characters for WWPN */
1864         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1865                 return -EINVAL;
1866
1867         stat = fc_parse_wwn(&buf[0], &vid.port_name);
1868         if (stat)
1869                 return stat;
1870
1871         stat = fc_parse_wwn(&buf[17], &vid.node_name);
1872         if (stat)
1873                 return stat;
1874
1875         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1876         vid.vport_type = FC_PORTTYPE_NPIV;
1877         /* vid.symbolic_name is already zero/NULL's */
1878         vid.disable = false;            /* always enabled */
1879
1880         /* we only allow support on Channel 0 !!! */
1881         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1882         return stat ? stat : count;
1883 }
1884 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1885                         store_fc_host_vport_create);
1886
1887
1888 /*
1889  * "Short-cut" sysfs variable to delete a vport on a FC Host.
1890  * Vport is identified by a string containing "<WWPN>:<WWNN>".
1891  * The WWNs are specified as hex characters, and may *not* contain
1892  * any prefixes (e.g. 0x, x, etc)
1893  */
1894 static ssize_t
1895 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1896                            const char *buf, size_t count)
1897 {
1898         struct Scsi_Host *shost = transport_class_to_shost(dev);
1899         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1900         struct fc_vport *vport;
1901         u64 wwpn, wwnn;
1902         unsigned long flags;
1903         unsigned int cnt=count;
1904         int stat, match;
1905
1906         /* count may include a LF at end of string */
1907         if (buf[cnt-1] == '\n')
1908                 cnt--;
1909
1910         /* validate we have enough characters for WWPN */
1911         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1912                 return -EINVAL;
1913
1914         stat = fc_parse_wwn(&buf[0], &wwpn);
1915         if (stat)
1916                 return stat;
1917
1918         stat = fc_parse_wwn(&buf[17], &wwnn);
1919         if (stat)
1920                 return stat;
1921
1922         spin_lock_irqsave(shost->host_lock, flags);
1923         match = 0;
1924         /* we only allow support on Channel 0 !!! */
1925         list_for_each_entry(vport, &fc_host->vports, peers) {
1926                 if ((vport->channel == 0) &&
1927                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1928                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1929                                 break;
1930                         vport->flags |= FC_VPORT_DELETING;
1931                         match = 1;
1932                         break;
1933                 }
1934         }
1935         spin_unlock_irqrestore(shost->host_lock, flags);
1936
1937         if (!match)
1938                 return -ENODEV;
1939
1940         stat = fc_vport_terminate(vport);
1941         return stat ? stat : count;
1942 }
1943 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1944                         store_fc_host_vport_delete);
1945
1946
1947 static int fc_host_match(struct attribute_container *cont,
1948                           struct device *dev)
1949 {
1950         struct Scsi_Host *shost;
1951         struct fc_internal *i;
1952
1953         if (!scsi_is_host_device(dev))
1954                 return 0;
1955
1956         shost = dev_to_shost(dev);
1957         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1958             != &fc_host_class.class)
1959                 return 0;
1960
1961         i = to_fc_internal(shost->transportt);
1962
1963         return &i->t.host_attrs.ac == cont;
1964 }
1965
1966 static int fc_target_match(struct attribute_container *cont,
1967                             struct device *dev)
1968 {
1969         struct Scsi_Host *shost;
1970         struct fc_internal *i;
1971
1972         if (!scsi_is_target_device(dev))
1973                 return 0;
1974
1975         shost = dev_to_shost(dev->parent);
1976         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1977             != &fc_host_class.class)
1978                 return 0;
1979
1980         i = to_fc_internal(shost->transportt);
1981
1982         return &i->t.target_attrs.ac == cont;
1983 }
1984
1985 static void fc_rport_dev_release(struct device *dev)
1986 {
1987         struct fc_rport *rport = dev_to_rport(dev);
1988         put_device(dev->parent);
1989         kfree(rport);
1990 }
1991
1992 int scsi_is_fc_rport(const struct device *dev)
1993 {
1994         return dev->release == fc_rport_dev_release;
1995 }
1996 EXPORT_SYMBOL(scsi_is_fc_rport);
1997
1998 static int fc_rport_match(struct attribute_container *cont,
1999                             struct device *dev)
2000 {
2001         struct Scsi_Host *shost;
2002         struct fc_internal *i;
2003
2004         if (!scsi_is_fc_rport(dev))
2005                 return 0;
2006
2007         shost = dev_to_shost(dev->parent);
2008         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2009             != &fc_host_class.class)
2010                 return 0;
2011
2012         i = to_fc_internal(shost->transportt);
2013
2014         return &i->rport_attr_cont.ac == cont;
2015 }
2016
2017
2018 static void fc_vport_dev_release(struct device *dev)
2019 {
2020         struct fc_vport *vport = dev_to_vport(dev);
2021         put_device(dev->parent);                /* release kobj parent */
2022         kfree(vport);
2023 }
2024
2025 int scsi_is_fc_vport(const struct device *dev)
2026 {
2027         return dev->release == fc_vport_dev_release;
2028 }
2029 EXPORT_SYMBOL(scsi_is_fc_vport);
2030
2031 static int fc_vport_match(struct attribute_container *cont,
2032                             struct device *dev)
2033 {
2034         struct fc_vport *vport;
2035         struct Scsi_Host *shost;
2036         struct fc_internal *i;
2037
2038         if (!scsi_is_fc_vport(dev))
2039                 return 0;
2040         vport = dev_to_vport(dev);
2041
2042         shost = vport_to_shost(vport);
2043         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2044             != &fc_host_class.class)
2045                 return 0;
2046
2047         i = to_fc_internal(shost->transportt);
2048         return &i->vport_attr_cont.ac == cont;
2049 }
2050
2051
2052 /**
2053  * fc_timed_out - FC Transport I/O timeout intercept handler
2054  * @scmd:       The SCSI command which timed out
2055  *
2056  * This routine protects against error handlers getting invoked while a
2057  * rport is in a blocked state, typically due to a temporarily loss of
2058  * connectivity. If the error handlers are allowed to proceed, requests
2059  * to abort i/o, reset the target, etc will likely fail as there is no way
2060  * to communicate with the device to perform the requested function. These
2061  * failures may result in the midlayer taking the device offline, requiring
2062  * manual intervention to restore operation.
2063  *
2064  * This routine, called whenever an i/o times out, validates the state of
2065  * the underlying rport. If the rport is blocked, it returns
2066  * EH_RESET_TIMER, which will continue to reschedule the timeout.
2067  * Eventually, either the device will return, or devloss_tmo will fire,
2068  * and when the timeout then fires, it will be handled normally.
2069  * If the rport is not blocked, normal error handling continues.
2070  *
2071  * Notes:
2072  *      This routine assumes no locks are held on entry.
2073  */
2074 static enum blk_eh_timer_return
2075 fc_timed_out(struct scsi_cmnd *scmd)
2076 {
2077         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2078
2079         if (rport->port_state == FC_PORTSTATE_BLOCKED)
2080                 return BLK_EH_RESET_TIMER;
2081
2082         return BLK_EH_NOT_HANDLED;
2083 }
2084
2085 /*
2086  * Called by fc_user_scan to locate an rport on the shost that
2087  * matches the channel and target id, and invoke scsi_scan_target()
2088  * on the rport.
2089  */
2090 static void
2091 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2092 {
2093         struct fc_rport *rport;
2094         unsigned long flags;
2095
2096         spin_lock_irqsave(shost->host_lock, flags);
2097
2098         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2099                 if (rport->scsi_target_id == -1)
2100                         continue;
2101
2102                 if (rport->port_state != FC_PORTSTATE_ONLINE)
2103                         continue;
2104
2105                 if ((channel == rport->channel) &&
2106                     (id == rport->scsi_target_id)) {
2107                         spin_unlock_irqrestore(shost->host_lock, flags);
2108                         scsi_scan_target(&rport->dev, channel, id, lun, 1);
2109                         return;
2110                 }
2111         }
2112
2113         spin_unlock_irqrestore(shost->host_lock, flags);
2114 }
2115
2116 /*
2117  * Called via sysfs scan routines. Necessary, as the FC transport
2118  * wants to place all target objects below the rport object. So this
2119  * routine must invoke the scsi_scan_target() routine with the rport
2120  * object as the parent.
2121  */
2122 static int
2123 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2124 {
2125         uint chlo, chhi;
2126         uint tgtlo, tgthi;
2127
2128         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2129             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2130             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2131                 return -EINVAL;
2132
2133         if (channel == SCAN_WILD_CARD) {
2134                 chlo = 0;
2135                 chhi = shost->max_channel + 1;
2136         } else {
2137                 chlo = channel;
2138                 chhi = channel + 1;
2139         }
2140
2141         if (id == SCAN_WILD_CARD) {
2142                 tgtlo = 0;
2143                 tgthi = shost->max_id;
2144         } else {
2145                 tgtlo = id;
2146                 tgthi = id + 1;
2147         }
2148
2149         for ( ; chlo < chhi; chlo++)
2150                 for ( ; tgtlo < tgthi; tgtlo++)
2151                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2152
2153         return 0;
2154 }
2155
2156 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2157                                 int result)
2158 {
2159         struct fc_internal *i = to_fc_internal(shost->transportt);
2160         return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2161 }
2162
2163 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2164 {
2165         struct fc_internal *i = to_fc_internal(shost->transportt);
2166         return i->f->it_nexus_response(shost, nexus, result);
2167 }
2168
2169 struct scsi_transport_template *
2170 fc_attach_transport(struct fc_function_template *ft)
2171 {
2172         int count;
2173         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2174                                         GFP_KERNEL);
2175
2176         if (unlikely(!i))
2177                 return NULL;
2178
2179         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2180         i->t.target_attrs.ac.class = &fc_transport_class.class;
2181         i->t.target_attrs.ac.match = fc_target_match;
2182         i->t.target_size = sizeof(struct fc_starget_attrs);
2183         transport_container_register(&i->t.target_attrs);
2184
2185         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2186         i->t.host_attrs.ac.class = &fc_host_class.class;
2187         i->t.host_attrs.ac.match = fc_host_match;
2188         i->t.host_size = sizeof(struct fc_host_attrs);
2189         if (ft->get_fc_host_stats)
2190                 i->t.host_attrs.statistics = &fc_statistics_group;
2191         transport_container_register(&i->t.host_attrs);
2192
2193         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2194         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2195         i->rport_attr_cont.ac.match = fc_rport_match;
2196         transport_container_register(&i->rport_attr_cont);
2197
2198         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2199         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2200         i->vport_attr_cont.ac.match = fc_vport_match;
2201         transport_container_register(&i->vport_attr_cont);
2202
2203         i->f = ft;
2204
2205         /* Transport uses the shost workq for scsi scanning */
2206         i->t.create_work_queue = 1;
2207
2208         i->t.eh_timed_out = fc_timed_out;
2209
2210         i->t.user_scan = fc_user_scan;
2211
2212         /* target-mode drivers' functions */
2213         i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2214         i->t.it_nexus_response = fc_it_nexus_response;
2215
2216         /*
2217          * Setup SCSI Target Attributes.
2218          */
2219         count = 0;
2220         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2221         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2222         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2223
2224         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2225
2226         i->starget_attrs[count] = NULL;
2227
2228
2229         /*
2230          * Setup SCSI Host Attributes.
2231          */
2232         count=0;
2233         SETUP_HOST_ATTRIBUTE_RD(node_name);
2234         SETUP_HOST_ATTRIBUTE_RD(port_name);
2235         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2236         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2237         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2238         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2239         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2240         if (ft->vport_create) {
2241                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2242                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2243         }
2244         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2245         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2246         SETUP_HOST_ATTRIBUTE_RD(model);
2247         SETUP_HOST_ATTRIBUTE_RD(model_description);
2248         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2249         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2250         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2251         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2252
2253         SETUP_HOST_ATTRIBUTE_RD(port_id);
2254         SETUP_HOST_ATTRIBUTE_RD(port_type);
2255         SETUP_HOST_ATTRIBUTE_RD(port_state);
2256         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2257         SETUP_HOST_ATTRIBUTE_RD(speed);
2258         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2259         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2260         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2261
2262         /* Transport-managed attributes */
2263         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2264         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2265         if (ft->issue_fc_host_lip)
2266                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2267         if (ft->vport_create)
2268                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2269         if (ft->vport_delete)
2270                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2271
2272         BUG_ON(count > FC_HOST_NUM_ATTRS);
2273
2274         i->host_attrs[count] = NULL;
2275
2276         /*
2277          * Setup Remote Port Attributes.
2278          */
2279         count=0;
2280         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2281         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2282         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2283         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2284         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2285         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2286         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2287         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2288         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2289         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2290
2291         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2292
2293         i->rport_attrs[count] = NULL;
2294
2295         /*
2296          * Setup Virtual Port Attributes.
2297          */
2298         count=0;
2299         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2300         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2301         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2302         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2303         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2304         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2305         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2306         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2307         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2308
2309         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2310
2311         i->vport_attrs[count] = NULL;
2312
2313         return &i->t;
2314 }
2315 EXPORT_SYMBOL(fc_attach_transport);
2316
2317 void fc_release_transport(struct scsi_transport_template *t)
2318 {
2319         struct fc_internal *i = to_fc_internal(t);
2320
2321         transport_container_unregister(&i->t.target_attrs);
2322         transport_container_unregister(&i->t.host_attrs);
2323         transport_container_unregister(&i->rport_attr_cont);
2324         transport_container_unregister(&i->vport_attr_cont);
2325
2326         kfree(i);
2327 }
2328 EXPORT_SYMBOL(fc_release_transport);
2329
2330 /**
2331  * fc_queue_work - Queue work to the fc_host workqueue.
2332  * @shost:      Pointer to Scsi_Host bound to fc_host.
2333  * @work:       Work to queue for execution.
2334  *
2335  * Return value:
2336  *      1 - work queued for execution
2337  *      0 - work is already queued
2338  *      -EINVAL - work queue doesn't exist
2339  */
2340 static int
2341 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2342 {
2343         if (unlikely(!fc_host_work_q(shost))) {
2344                 printk(KERN_ERR
2345                         "ERROR: FC host '%s' attempted to queue work, "
2346                         "when no workqueue created.\n", shost->hostt->name);
2347                 dump_stack();
2348
2349                 return -EINVAL;
2350         }
2351
2352         return queue_work(fc_host_work_q(shost), work);
2353 }
2354
2355 /**
2356  * fc_flush_work - Flush a fc_host's workqueue.
2357  * @shost:      Pointer to Scsi_Host bound to fc_host.
2358  */
2359 static void
2360 fc_flush_work(struct Scsi_Host *shost)
2361 {
2362         if (!fc_host_work_q(shost)) {
2363                 printk(KERN_ERR
2364                         "ERROR: FC host '%s' attempted to flush work, "
2365                         "when no workqueue created.\n", shost->hostt->name);
2366                 dump_stack();
2367                 return;
2368         }
2369
2370         flush_workqueue(fc_host_work_q(shost));
2371 }
2372
2373 /**
2374  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2375  * @shost:      Pointer to Scsi_Host bound to fc_host.
2376  * @work:       Work to queue for execution.
2377  * @delay:      jiffies to delay the work queuing
2378  *
2379  * Return value:
2380  *      1 on success / 0 already queued / < 0 for error
2381  */
2382 static int
2383 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2384                                 unsigned long delay)
2385 {
2386         if (unlikely(!fc_host_devloss_work_q(shost))) {
2387                 printk(KERN_ERR
2388                         "ERROR: FC host '%s' attempted to queue work, "
2389                         "when no workqueue created.\n", shost->hostt->name);
2390                 dump_stack();
2391
2392                 return -EINVAL;
2393         }
2394
2395         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2396 }
2397
2398 /**
2399  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2400  * @shost:      Pointer to Scsi_Host bound to fc_host.
2401  */
2402 static void
2403 fc_flush_devloss(struct Scsi_Host *shost)
2404 {
2405         if (!fc_host_devloss_work_q(shost)) {
2406                 printk(KERN_ERR
2407                         "ERROR: FC host '%s' attempted to flush work, "
2408                         "when no workqueue created.\n", shost->hostt->name);
2409                 dump_stack();
2410                 return;
2411         }
2412
2413         flush_workqueue(fc_host_devloss_work_q(shost));
2414 }
2415
2416
2417 /**
2418  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2419  * @shost:      Which &Scsi_Host
2420  *
2421  * This routine is expected to be called immediately preceding the
2422  * a driver's call to scsi_remove_host().
2423  *
2424  * WARNING: A driver utilizing the fc_transport, which fails to call
2425  *   this routine prior to scsi_remove_host(), will leave dangling
2426  *   objects in /sys/class/fc_remote_ports. Access to any of these
2427  *   objects can result in a system crash !!!
2428  *
2429  * Notes:
2430  *      This routine assumes no locks are held on entry.
2431  */
2432 void
2433 fc_remove_host(struct Scsi_Host *shost)
2434 {
2435         struct fc_vport *vport = NULL, *next_vport = NULL;
2436         struct fc_rport *rport = NULL, *next_rport = NULL;
2437         struct workqueue_struct *work_q;
2438         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2439         unsigned long flags;
2440
2441         spin_lock_irqsave(shost->host_lock, flags);
2442
2443         /* Remove any vports */
2444         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2445                 fc_queue_work(shost, &vport->vport_delete_work);
2446
2447         /* Remove any remote ports */
2448         list_for_each_entry_safe(rport, next_rport,
2449                         &fc_host->rports, peers) {
2450                 list_del(&rport->peers);
2451                 rport->port_state = FC_PORTSTATE_DELETED;
2452                 fc_queue_work(shost, &rport->rport_delete_work);
2453         }
2454
2455         list_for_each_entry_safe(rport, next_rport,
2456                         &fc_host->rport_bindings, peers) {
2457                 list_del(&rport->peers);
2458                 rport->port_state = FC_PORTSTATE_DELETED;
2459                 fc_queue_work(shost, &rport->rport_delete_work);
2460         }
2461
2462         spin_unlock_irqrestore(shost->host_lock, flags);
2463
2464         /* flush all scan work items */
2465         scsi_flush_work(shost);
2466
2467         /* flush all stgt delete, and rport delete work items, then kill it  */
2468         if (fc_host->work_q) {
2469                 work_q = fc_host->work_q;
2470                 fc_host->work_q = NULL;
2471                 destroy_workqueue(work_q);
2472         }
2473
2474         /* flush all devloss work items, then kill it  */
2475         if (fc_host->devloss_work_q) {
2476                 work_q = fc_host->devloss_work_q;
2477                 fc_host->devloss_work_q = NULL;
2478                 destroy_workqueue(work_q);
2479         }
2480 }
2481 EXPORT_SYMBOL(fc_remove_host);
2482
2483 static void fc_terminate_rport_io(struct fc_rport *rport)
2484 {
2485         struct Scsi_Host *shost = rport_to_shost(rport);
2486         struct fc_internal *i = to_fc_internal(shost->transportt);
2487
2488         /* Involve the LLDD if possible to terminate all io on the rport. */
2489         if (i->f->terminate_rport_io)
2490                 i->f->terminate_rport_io(rport);
2491
2492         /*
2493          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2494          */
2495         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2496 }
2497
2498 /**
2499  * fc_starget_delete - called to delete the scsi descendants of an rport
2500  * @work:       remote port to be operated on.
2501  *
2502  * Deletes target and all sdevs.
2503  */
2504 static void
2505 fc_starget_delete(struct work_struct *work)
2506 {
2507         struct fc_rport *rport =
2508                 container_of(work, struct fc_rport, stgt_delete_work);
2509
2510         fc_terminate_rport_io(rport);
2511         scsi_remove_target(&rport->dev);
2512 }
2513
2514
2515 /**
2516  * fc_rport_final_delete - finish rport termination and delete it.
2517  * @work:       remote port to be deleted.
2518  */
2519 static void
2520 fc_rport_final_delete(struct work_struct *work)
2521 {
2522         struct fc_rport *rport =
2523                 container_of(work, struct fc_rport, rport_delete_work);
2524         struct device *dev = &rport->dev;
2525         struct Scsi_Host *shost = rport_to_shost(rport);
2526         struct fc_internal *i = to_fc_internal(shost->transportt);
2527         unsigned long flags;
2528         int do_callback = 0;
2529
2530         fc_terminate_rport_io(rport);
2531
2532         /*
2533          * if a scan is pending, flush the SCSI Host work_q so that
2534          * that we can reclaim the rport scan work element.
2535          */
2536         if (rport->flags & FC_RPORT_SCAN_PENDING)
2537                 scsi_flush_work(shost);
2538
2539         /*
2540          * Cancel any outstanding timers. These should really exist
2541          * only when rmmod'ing the LLDD and we're asking for
2542          * immediate termination of the rports
2543          */
2544         spin_lock_irqsave(shost->host_lock, flags);
2545         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2546                 spin_unlock_irqrestore(shost->host_lock, flags);
2547                 if (!cancel_delayed_work(&rport->fail_io_work))
2548                         fc_flush_devloss(shost);
2549                 if (!cancel_delayed_work(&rport->dev_loss_work))
2550                         fc_flush_devloss(shost);
2551                 spin_lock_irqsave(shost->host_lock, flags);
2552                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2553         }
2554         spin_unlock_irqrestore(shost->host_lock, flags);
2555
2556         /* Delete SCSI target and sdevs */
2557         if (rport->scsi_target_id != -1)
2558                 fc_starget_delete(&rport->stgt_delete_work);
2559
2560         /*
2561          * Notify the driver that the rport is now dead. The LLDD will
2562          * also guarantee that any communication to the rport is terminated
2563          *
2564          * Avoid this call if we already called it when we preserved the
2565          * rport for the binding.
2566          */
2567         spin_lock_irqsave(shost->host_lock, flags);
2568         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2569             (i->f->dev_loss_tmo_callbk)) {
2570                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2571                 do_callback = 1;
2572         }
2573         spin_unlock_irqrestore(shost->host_lock, flags);
2574
2575         if (do_callback)
2576                 i->f->dev_loss_tmo_callbk(rport);
2577
2578         fc_bsg_remove(rport->rqst_q);
2579
2580         transport_remove_device(dev);
2581         device_del(dev);
2582         transport_destroy_device(dev);
2583         put_device(&shost->shost_gendev);       /* for fc_host->rport list */
2584         put_device(dev);                        /* for self-reference */
2585 }
2586
2587
2588 /**
2589  * fc_rport_create - allocates and creates a remote FC port.
2590  * @shost:      scsi host the remote port is connected to.
2591  * @channel:    Channel on shost port connected to.
2592  * @ids:        The world wide names, fc address, and FC4 port
2593  *              roles for the remote port.
2594  *
2595  * Allocates and creates the remoter port structure, including the
2596  * class and sysfs creation.
2597  *
2598  * Notes:
2599  *      This routine assumes no locks are held on entry.
2600  */
2601 static struct fc_rport *
2602 fc_rport_create(struct Scsi_Host *shost, int channel,
2603         struct fc_rport_identifiers  *ids)
2604 {
2605         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2606         struct fc_internal *fci = to_fc_internal(shost->transportt);
2607         struct fc_rport *rport;
2608         struct device *dev;
2609         unsigned long flags;
2610         int error;
2611         size_t size;
2612
2613         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2614         rport = kzalloc(size, GFP_KERNEL);
2615         if (unlikely(!rport)) {
2616                 printk(KERN_ERR "%s: allocation failure\n", __func__);
2617                 return NULL;
2618         }
2619
2620         rport->maxframe_size = -1;
2621         rport->supported_classes = FC_COS_UNSPECIFIED;
2622         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2623         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2624         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2625         rport->port_id = ids->port_id;
2626         rport->roles = ids->roles;
2627         rport->port_state = FC_PORTSTATE_ONLINE;
2628         if (fci->f->dd_fcrport_size)
2629                 rport->dd_data = &rport[1];
2630         rport->channel = channel;
2631         rport->fast_io_fail_tmo = -1;
2632
2633         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2634         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2635         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2636         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2637         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2638
2639         spin_lock_irqsave(shost->host_lock, flags);
2640
2641         rport->number = fc_host->next_rport_number++;
2642         if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2643                 rport->scsi_target_id = fc_host->next_target_id++;
2644         else
2645                 rport->scsi_target_id = -1;
2646         list_add_tail(&rport->peers, &fc_host->rports);
2647         get_device(&shost->shost_gendev);       /* for fc_host->rport list */
2648
2649         spin_unlock_irqrestore(shost->host_lock, flags);
2650
2651         dev = &rport->dev;
2652         device_initialize(dev);                 /* takes self reference */
2653         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2654         dev->release = fc_rport_dev_release;
2655         dev_set_name(dev, "rport-%d:%d-%d",
2656                      shost->host_no, channel, rport->number);
2657         transport_setup_device(dev);
2658
2659         error = device_add(dev);
2660         if (error) {
2661                 printk(KERN_ERR "FC Remote Port device_add failed\n");
2662                 goto delete_rport;
2663         }
2664         transport_add_device(dev);
2665         transport_configure_device(dev);
2666
2667         fc_bsg_rportadd(shost, rport);
2668         /* ignore any bsg add error - we just can't do sgio */
2669
2670         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2671                 /* initiate a scan of the target */
2672                 rport->flags |= FC_RPORT_SCAN_PENDING;
2673                 scsi_queue_work(shost, &rport->scan_work);
2674         }
2675
2676         return rport;
2677
2678 delete_rport:
2679         transport_destroy_device(dev);
2680         spin_lock_irqsave(shost->host_lock, flags);
2681         list_del(&rport->peers);
2682         put_device(&shost->shost_gendev);       /* for fc_host->rport list */
2683         spin_unlock_irqrestore(shost->host_lock, flags);
2684         put_device(dev->parent);
2685         kfree(rport);
2686         return NULL;
2687 }
2688
2689 /**
2690  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2691  * @shost:      scsi host the remote port is connected to.
2692  * @channel:    Channel on shost port connected to.
2693  * @ids:        The world wide names, fc address, and FC4 port
2694  *              roles for the remote port.
2695  *
2696  * The LLDD calls this routine to notify the transport of the existence
2697  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2698  * of the port, it's FC address (port_id), and the FC4 roles that are
2699  * active for the port.
2700  *
2701  * For ports that are FCP targets (aka scsi targets), the FC transport
2702  * maintains consistent target id bindings on behalf of the LLDD.
2703  * A consistent target id binding is an assignment of a target id to
2704  * a remote port identifier, which persists while the scsi host is
2705  * attached. The remote port can disappear, then later reappear, and
2706  * it's target id assignment remains the same. This allows for shifts
2707  * in FC addressing (if binding by wwpn or wwnn) with no apparent
2708  * changes to the scsi subsystem which is based on scsi host number and
2709  * target id values.  Bindings are only valid during the attachment of
2710  * the scsi host. If the host detaches, then later re-attaches, target
2711  * id bindings may change.
2712  *
2713  * This routine is responsible for returning a remote port structure.
2714  * The routine will search the list of remote ports it maintains
2715  * internally on behalf of consistent target id mappings. If found, the
2716  * remote port structure will be reused. Otherwise, a new remote port
2717  * structure will be allocated.
2718  *
2719  * Whenever a remote port is allocated, a new fc_remote_port class
2720  * device is created.
2721  *
2722  * Should not be called from interrupt context.
2723  *
2724  * Notes:
2725  *      This routine assumes no locks are held on entry.
2726  */
2727 struct fc_rport *
2728 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2729         struct fc_rport_identifiers  *ids)
2730 {
2731         struct fc_internal *fci = to_fc_internal(shost->transportt);
2732         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2733         struct fc_rport *rport;
2734         unsigned long flags;
2735         int match = 0;
2736
2737         /* ensure any stgt delete functions are done */
2738         fc_flush_work(shost);
2739
2740         /*
2741          * Search the list of "active" rports, for an rport that has been
2742          * deleted, but we've held off the real delete while the target
2743          * is in a "blocked" state.
2744          */
2745         spin_lock_irqsave(shost->host_lock, flags);
2746
2747         list_for_each_entry(rport, &fc_host->rports, peers) {
2748
2749                 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2750                         (rport->channel == channel)) {
2751
2752                         switch (fc_host->tgtid_bind_type) {
2753                         case FC_TGTID_BIND_BY_WWPN:
2754                         case FC_TGTID_BIND_NONE:
2755                                 if (rport->port_name == ids->port_name)
2756                                         match = 1;
2757                                 break;
2758                         case FC_TGTID_BIND_BY_WWNN:
2759                                 if (rport->node_name == ids->node_name)
2760                                         match = 1;
2761                                 break;
2762                         case FC_TGTID_BIND_BY_ID:
2763                                 if (rport->port_id == ids->port_id)
2764                                         match = 1;
2765                                 break;
2766                         }
2767
2768                         if (match) {
2769
2770                                 memcpy(&rport->node_name, &ids->node_name,
2771                                         sizeof(rport->node_name));
2772                                 memcpy(&rport->port_name, &ids->port_name,
2773                                         sizeof(rport->port_name));
2774                                 rport->port_id = ids->port_id;
2775
2776                                 rport->port_state = FC_PORTSTATE_ONLINE;
2777                                 rport->roles = ids->roles;
2778
2779                                 spin_unlock_irqrestore(shost->host_lock, flags);
2780
2781                                 if (fci->f->dd_fcrport_size)
2782                                         memset(rport->dd_data, 0,
2783                                                 fci->f->dd_fcrport_size);
2784
2785                                 /*
2786                                  * If we were not a target, cancel the
2787                                  * io terminate and rport timers, and
2788                                  * we're done.
2789                                  *
2790                                  * If we were a target, but our new role
2791                                  * doesn't indicate a target, leave the
2792                                  * timers running expecting the role to
2793                                  * change as the target fully logs in. If
2794                                  * it doesn't, the target will be torn down.
2795                                  *
2796                                  * If we were a target, and our role shows
2797                                  * we're still a target, cancel the timers
2798                                  * and kick off a scan.
2799                                  */
2800
2801                                 /* was a target, not in roles */
2802                                 if ((rport->scsi_target_id != -1) &&
2803                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2804                                         return rport;
2805
2806                                 /*
2807                                  * Stop the fail io and dev_loss timers.
2808                                  * If they flush, the port_state will
2809                                  * be checked and will NOOP the function.
2810                                  */
2811                                 if (!cancel_delayed_work(&rport->fail_io_work))
2812                                         fc_flush_devloss(shost);
2813                                 if (!cancel_delayed_work(&rport->dev_loss_work))
2814                                         fc_flush_devloss(shost);
2815
2816                                 spin_lock_irqsave(shost->host_lock, flags);
2817
2818                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2819                                                   FC_RPORT_DEVLOSS_PENDING |
2820                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
2821
2822                                 spin_unlock_irqrestore(shost->host_lock, flags);
2823
2824                                 /* if target, initiate a scan */
2825                                 if (rport->scsi_target_id != -1) {
2826                                         scsi_target_unblock(&rport->dev,
2827                                                             SDEV_RUNNING);
2828                                         spin_lock_irqsave(shost->host_lock,
2829                                                           flags);
2830                                         rport->flags |= FC_RPORT_SCAN_PENDING;
2831                                         scsi_queue_work(shost,
2832                                                         &rport->scan_work);
2833                                         spin_unlock_irqrestore(shost->host_lock,
2834                                                         flags);
2835                                 }
2836
2837                                 fc_bsg_goose_queue(rport);
2838
2839                                 return rport;
2840                         }
2841                 }
2842         }
2843
2844         /*
2845          * Search the bindings array
2846          * Note: if never a FCP target, you won't be on this list
2847          */
2848         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2849
2850                 /* search for a matching consistent binding */
2851
2852                 list_for_each_entry(rport, &fc_host->rport_bindings,
2853                                         peers) {
2854                         if (rport->channel != channel)
2855                                 continue;
2856
2857                         switch (fc_host->tgtid_bind_type) {
2858                         case FC_TGTID_BIND_BY_WWPN:
2859                                 if (rport->port_name == ids->port_name)
2860                                         match = 1;
2861                                 break;
2862                         case FC_TGTID_BIND_BY_WWNN:
2863                                 if (rport->node_name == ids->node_name)
2864                                         match = 1;
2865                                 break;
2866                         case FC_TGTID_BIND_BY_ID:
2867                                 if (rport->port_id == ids->port_id)
2868                                         match = 1;
2869                                 break;
2870                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2871                                 break;
2872                         }
2873
2874                         if (match) {
2875                                 list_move_tail(&rport->peers, &fc_host->rports);
2876                                 break;
2877                         }
2878                 }
2879
2880                 if (match) {
2881                         memcpy(&rport->node_name, &ids->node_name,
2882                                 sizeof(rport->node_name));
2883                         memcpy(&rport->port_name, &ids->port_name,
2884                                 sizeof(rport->port_name));
2885                         rport->port_id = ids->port_id;
2886                         rport->roles = ids->roles;
2887                         rport->port_state = FC_PORTSTATE_ONLINE;
2888                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2889
2890                         if (fci->f->dd_fcrport_size)
2891                                 memset(rport->dd_data, 0,
2892                                                 fci->f->dd_fcrport_size);
2893                         spin_unlock_irqrestore(shost->host_lock, flags);
2894
2895                         if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
2896                                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
2897
2898                                 /* initiate a scan of the target */
2899                                 spin_lock_irqsave(shost->host_lock, flags);
2900                                 rport->flags |= FC_RPORT_SCAN_PENDING;
2901                                 scsi_queue_work(shost, &rport->scan_work);
2902                                 spin_unlock_irqrestore(shost->host_lock, flags);
2903                         }
2904                         return rport;
2905                 }
2906         }
2907
2908         spin_unlock_irqrestore(shost->host_lock, flags);
2909
2910         /* No consistent binding found - create new remote port entry */
2911         rport = fc_rport_create(shost, channel, ids);
2912
2913         return rport;
2914 }
2915 EXPORT_SYMBOL(fc_remote_port_add);
2916
2917
2918 /**
2919  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2920  * @rport:      The remote port that no longer exists
2921  *
2922  * The LLDD calls this routine to notify the transport that a remote
2923  * port is no longer part of the topology. Note: Although a port
2924  * may no longer be part of the topology, it may persist in the remote
2925  * ports displayed by the fc_host. We do this under 2 conditions:
2926  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2927  *   This allows the port to temporarily disappear, then reappear without
2928  *   disrupting the SCSI device tree attached to it. During the "blocked"
2929  *   period the port will still exist.
2930  * 2) If the port was a scsi target and disappears for longer than we
2931  *   expect, we'll delete the port and the tear down the SCSI device tree
2932  *   attached to it. However, we want to semi-persist the target id assigned
2933  *   to that port if it eventually does exist. The port structure will
2934  *   remain (although with minimal information) so that the target id
2935  *   bindings remails.
2936  *
2937  * If the remote port is not an FCP Target, it will be fully torn down
2938  * and deallocated, including the fc_remote_port class device.
2939  *
2940  * If the remote port is an FCP Target, the port will be placed in a
2941  * temporary blocked state. From the LLDD's perspective, the rport no
2942  * longer exists. From the SCSI midlayer's perspective, the SCSI target
2943  * exists, but all sdevs on it are blocked from further I/O. The following
2944  * is then expected.
2945  *
2946  *   If the remote port does not return (signaled by a LLDD call to
2947  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2948  *   scsi target is removed - killing all outstanding i/o and removing the
2949  *   scsi devices attached ot it. The port structure will be marked Not
2950  *   Present and be partially cleared, leaving only enough information to
2951  *   recognize the remote port relative to the scsi target id binding if
2952  *   it later appears.  The port will remain as long as there is a valid
2953  *   binding (e.g. until the user changes the binding type or unloads the
2954  *   scsi host with the binding).
2955  *
2956  *   If the remote port returns within the dev_loss_tmo value (and matches
2957  *   according to the target id binding type), the port structure will be
2958  *   reused. If it is no longer a SCSI target, the target will be torn
2959  *   down. If it continues to be a SCSI target, then the target will be
2960  *   unblocked (allowing i/o to be resumed), and a scan will be activated
2961  *   to ensure that all luns are detected.
2962  *
2963  * Called from normal process context only - cannot be called from interrupt.
2964  *
2965  * Notes:
2966  *      This routine assumes no locks are held on entry.
2967  */
2968 void
2969 fc_remote_port_delete(struct fc_rport  *rport)
2970 {
2971         struct Scsi_Host *shost = rport_to_shost(rport);
2972         unsigned long timeout = rport->dev_loss_tmo;
2973         unsigned long flags;
2974
2975         /*
2976          * No need to flush the fc_host work_q's, as all adds are synchronous.
2977          *
2978          * We do need to reclaim the rport scan work element, so eventually
2979          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2980          * there's still a scan pending.
2981          */
2982
2983         spin_lock_irqsave(shost->host_lock, flags);
2984
2985         if (rport->port_state != FC_PORTSTATE_ONLINE) {
2986                 spin_unlock_irqrestore(shost->host_lock, flags);
2987                 return;
2988         }
2989
2990         /*
2991          * In the past, we if this was not an FCP-Target, we would
2992          * unconditionally just jump to deleting the rport.
2993          * However, rports can be used as node containers by the LLDD,
2994          * and its not appropriate to just terminate the rport at the
2995          * first sign of a loss in connectivity. The LLDD may want to
2996          * send ELS traffic to re-validate the login. If the rport is
2997          * immediately deleted, it makes it inappropriate for a node
2998          * container.
2999          * So... we now unconditionally wait dev_loss_tmo before
3000          * destroying an rport.
3001          */
3002
3003         rport->port_state = FC_PORTSTATE_BLOCKED;
3004
3005         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3006
3007         spin_unlock_irqrestore(shost->host_lock, flags);
3008
3009         if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
3010             shost->active_mode & MODE_TARGET)
3011                 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
3012
3013         scsi_target_block(&rport->dev);
3014
3015         /* see if we need to kill io faster than waiting for device loss */
3016         if ((rport->fast_io_fail_tmo != -1) &&
3017             (rport->fast_io_fail_tmo < timeout))
3018                 fc_queue_devloss_work(shost, &rport->fail_io_work,
3019                                         rport->fast_io_fail_tmo * HZ);
3020
3021         /* cap the length the devices can be blocked until they are deleted */
3022         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3023 }
3024 EXPORT_SYMBOL(fc_remote_port_delete);
3025
3026 /**
3027  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3028  * @rport:      The remote port that changed.
3029  * @roles:      New roles for this port.
3030  *
3031  * Description: The LLDD calls this routine to notify the transport that the
3032  * roles on a remote port may have changed. The largest effect of this is
3033  * if a port now becomes a FCP Target, it must be allocated a
3034  * scsi target id.  If the port is no longer a FCP target, any
3035  * scsi target id value assigned to it will persist in case the
3036  * role changes back to include FCP Target. No changes in the scsi
3037  * midlayer will be invoked if the role changes (in the expectation
3038  * that the role will be resumed. If it doesn't normal error processing
3039  * will take place).
3040  *
3041  * Should not be called from interrupt context.
3042  *
3043  * Notes:
3044  *      This routine assumes no locks are held on entry.
3045  */
3046 void
3047 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3048 {
3049         struct Scsi_Host *shost = rport_to_shost(rport);
3050         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3051         unsigned long flags;
3052         int create = 0;
3053         int ret;
3054
3055         spin_lock_irqsave(shost->host_lock, flags);
3056         if (roles & FC_PORT_ROLE_FCP_TARGET) {
3057                 if (rport->scsi_target_id == -1) {
3058                         rport->scsi_target_id = fc_host->next_target_id++;
3059                         create = 1;
3060                 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3061                         create = 1;
3062         } else if (shost->active_mode & MODE_TARGET) {
3063                 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
3064                                              (char *)&rport->node_name);
3065                 if (ret)
3066                         printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
3067                                ret);
3068         }
3069
3070         rport->roles = roles;
3071
3072         spin_unlock_irqrestore(shost->host_lock, flags);
3073
3074         if (create) {
3075                 /*
3076                  * There may have been a delete timer running on the
3077                  * port. Ensure that it is cancelled as we now know
3078                  * the port is an FCP Target.
3079                  * Note: we know the rport is exists and in an online
3080                  *  state as the LLDD would not have had an rport
3081                  *  reference to pass us.
3082                  *
3083                  * Take no action on the del_timer failure as the state
3084                  * machine state change will validate the
3085                  * transaction.
3086                  */
3087                 if (!cancel_delayed_work(&rport->fail_io_work))
3088                         fc_flush_devloss(shost);
3089                 if (!cancel_delayed_work(&rport->dev_loss_work))
3090                         fc_flush_devloss(shost);
3091
3092                 spin_lock_irqsave(shost->host_lock, flags);
3093                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3094                                   FC_RPORT_DEVLOSS_PENDING |
3095                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3096                 spin_unlock_irqrestore(shost->host_lock, flags);
3097
3098                 /* ensure any stgt delete functions are done */
3099                 fc_flush_work(shost);
3100
3101                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3102                 /* initiate a scan of the target */
3103                 spin_lock_irqsave(shost->host_lock, flags);
3104                 rport->flags |= FC_RPORT_SCAN_PENDING;
3105                 scsi_queue_work(shost, &rport->scan_work);
3106                 spin_unlock_irqrestore(shost->host_lock, flags);
3107         }
3108 }
3109 EXPORT_SYMBOL(fc_remote_port_rolechg);
3110
3111 /**
3112  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3113  * @work:       rport target that failed to reappear in the allotted time.
3114  *
3115  * Description: An attempt to delete a remote port blocks, and if it fails
3116  *              to return in the allotted time this gets called.
3117  */
3118 static void
3119 fc_timeout_deleted_rport(struct work_struct *work)
3120 {
3121         struct fc_rport *rport =
3122                 container_of(work, struct fc_rport, dev_loss_work.work);
3123         struct Scsi_Host *shost = rport_to_shost(rport);
3124         struct fc_internal *i = to_fc_internal(shost->transportt);
3125         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3126         unsigned long flags;
3127         int do_callback = 0;
3128
3129         spin_lock_irqsave(shost->host_lock, flags);
3130
3131         rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3132
3133         /*
3134          * If the port is ONLINE, then it came back. If it was a SCSI
3135          * target, validate it still is. If not, tear down the
3136          * scsi_target on it.
3137          */
3138         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3139             (rport->scsi_target_id != -1) &&
3140             !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3141                 dev_printk(KERN_ERR, &rport->dev,
3142                         "blocked FC remote port time out: no longer"
3143                         " a FCP target, removing starget\n");
3144                 spin_unlock_irqrestore(shost->host_lock, flags);
3145                 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3146                 fc_queue_work(shost, &rport->stgt_delete_work);
3147                 return;
3148         }
3149
3150         /* NOOP state - we're flushing workq's */
3151         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3152                 spin_unlock_irqrestore(shost->host_lock, flags);
3153                 dev_printk(KERN_ERR, &rport->dev,
3154                         "blocked FC remote port time out: leaving"
3155                         " rport%s alone\n",
3156                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3157                 return;
3158         }
3159
3160         if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3161             (rport->scsi_target_id == -1)) {
3162                 list_del(&rport->peers);
3163                 rport->port_state = FC_PORTSTATE_DELETED;
3164                 dev_printk(KERN_ERR, &rport->dev,
3165                         "blocked FC remote port time out: removing"
3166                         " rport%s\n",
3167                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3168                 fc_queue_work(shost, &rport->rport_delete_work);
3169                 spin_unlock_irqrestore(shost->host_lock, flags);
3170                 return;
3171         }
3172
3173         dev_printk(KERN_ERR, &rport->dev,
3174                 "blocked FC remote port time out: removing target and "
3175                 "saving binding\n");
3176
3177         list_move_tail(&rport->peers, &fc_host->rport_bindings);
3178
3179         /*
3180          * Note: We do not remove or clear the hostdata area. This allows
3181          *   host-specific target data to persist along with the
3182          *   scsi_target_id. It's up to the host to manage it's hostdata area.
3183          */
3184
3185         /*
3186          * Reinitialize port attributes that may change if the port comes back.
3187          */
3188         rport->maxframe_size = -1;
3189         rport->supported_classes = FC_COS_UNSPECIFIED;
3190         rport->roles = FC_PORT_ROLE_UNKNOWN;
3191         rport->port_state = FC_PORTSTATE_NOTPRESENT;
3192         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3193
3194         /*
3195          * Pre-emptively kill I/O rather than waiting for the work queue
3196          * item to teardown the starget. (FCOE libFC folks prefer this
3197          * and to have the rport_port_id still set when it's done).
3198          */
3199         spin_unlock_irqrestore(shost->host_lock, flags);
3200         fc_terminate_rport_io(rport);
3201
3202         spin_lock_irqsave(shost->host_lock, flags);
3203
3204         if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {     /* still missing */
3205
3206                 /* remove the identifiers that aren't used in the consisting binding */
3207                 switch (fc_host->tgtid_bind_type) {
3208                 case FC_TGTID_BIND_BY_WWPN:
3209                         rport->node_name = -1;
3210                         rport->port_id = -1;
3211                         break;
3212                 case FC_TGTID_BIND_BY_WWNN:
3213                         rport->port_name = -1;
3214                         rport->port_id = -1;
3215                         break;
3216                 case FC_TGTID_BIND_BY_ID:
3217                         rport->node_name = -1;
3218                         rport->port_name = -1;
3219                         break;
3220                 case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
3221                         break;
3222                 }
3223
3224                 /*
3225                  * As this only occurs if the remote port (scsi target)
3226                  * went away and didn't come back - we'll remove
3227                  * all attached scsi devices.
3228                  */
3229                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3230                 fc_queue_work(shost, &rport->stgt_delete_work);
3231
3232                 do_callback = 1;
3233         }
3234
3235         spin_unlock_irqrestore(shost->host_lock, flags);
3236
3237         /*
3238          * Notify the driver that the rport is now dead. The LLDD will
3239          * also guarantee that any communication to the rport is terminated
3240          *
3241          * Note: we set the CALLBK_DONE flag above to correspond
3242          */
3243         if (do_callback && i->f->dev_loss_tmo_callbk)
3244                 i->f->dev_loss_tmo_callbk(rport);
3245 }
3246
3247
3248 /**
3249  * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3250  * @work:       rport to terminate io on.
3251  *
3252  * Notes: Only requests the failure of the io, not that all are flushed
3253  *    prior to returning.
3254  */
3255 static void
3256 fc_timeout_fail_rport_io(struct work_struct *work)
3257 {
3258         struct fc_rport *rport =
3259                 container_of(work, struct fc_rport, fail_io_work.work);
3260
3261         if (rport->port_state != FC_PORTSTATE_BLOCKED)
3262                 return;
3263
3264         rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3265         fc_terminate_rport_io(rport);
3266 }
3267
3268 /**
3269  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3270  * @work:       remote port to be scanned.
3271  */
3272 static void
3273 fc_scsi_scan_rport(struct work_struct *work)
3274 {
3275         struct fc_rport *rport =
3276                 container_of(work, struct fc_rport, scan_work);
3277         struct Scsi_Host *shost = rport_to_shost(rport);
3278         struct fc_internal *i = to_fc_internal(shost->transportt);
3279         unsigned long flags;
3280
3281         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3282             (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3283             !(i->f->disable_target_scan)) {
3284                 scsi_scan_target(&rport->dev, rport->channel,
3285                         rport->scsi_target_id, SCAN_WILD_CARD, 1);
3286         }
3287
3288         spin_lock_irqsave(shost->host_lock, flags);
3289         rport->flags &= ~FC_RPORT_SCAN_PENDING;
3290         spin_unlock_irqrestore(shost->host_lock, flags);
3291 }
3292
3293 /**
3294  * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3295  * @cmnd: SCSI command that scsi_eh is trying to recover
3296  *
3297  * This routine can be called from a FC LLD scsi_eh callback. It
3298  * blocks the scsi_eh thread until the fc_rport leaves the
3299  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3300  * necessary to avoid the scsi_eh failing recovery actions for blocked
3301  * rports which would lead to offlined SCSI devices.
3302  *
3303  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3304  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3305  *          passed back to scsi_eh.
3306  */
3307 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3308 {
3309         struct Scsi_Host *shost = cmnd->device->host;
3310         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3311         unsigned long flags;
3312
3313         spin_lock_irqsave(shost->host_lock, flags);
3314         while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3315                !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3316                 spin_unlock_irqrestore(shost->host_lock, flags);
3317                 msleep(1000);
3318                 spin_lock_irqsave(shost->host_lock, flags);
3319         }
3320         spin_unlock_irqrestore(shost->host_lock, flags);
3321
3322         if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3323                 return FAST_IO_FAIL;
3324
3325         return 0;
3326 }
3327 EXPORT_SYMBOL(fc_block_scsi_eh);
3328
3329 /**
3330  * fc_vport_setup - allocates and creates a FC virtual port.
3331  * @shost:      scsi host the virtual port is connected to.
3332  * @channel:    Channel on shost port connected to.
3333  * @pdev:       parent device for vport
3334  * @ids:        The world wide names, FC4 port roles, etc for
3335  *              the virtual port.
3336  * @ret_vport:  The pointer to the created vport.
3337  *
3338  * Allocates and creates the vport structure, calls the parent host
3339  * to instantiate the vport, the completes w/ class and sysfs creation.
3340  *
3341  * Notes:
3342  *      This routine assumes no locks are held on entry.
3343  */
3344 static int
3345 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3346         struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
3347 {
3348         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3349         struct fc_internal *fci = to_fc_internal(shost->transportt);
3350         struct fc_vport *vport;
3351         struct device *dev;
3352         unsigned long flags;
3353         size_t size;
3354         int error;
3355
3356         *ret_vport = NULL;
3357
3358         if ( ! fci->f->vport_create)
3359                 return -ENOENT;
3360
3361         size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3362         vport = kzalloc(size, GFP_KERNEL);
3363         if (unlikely(!vport)) {
3364                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3365                 return -ENOMEM;
3366         }
3367
3368         vport->vport_state = FC_VPORT_UNKNOWN;
3369         vport->vport_last_state = FC_VPORT_UNKNOWN;
3370         vport->node_name = ids->node_name;
3371         vport->port_name = ids->port_name;
3372         vport->roles = ids->roles;
3373         vport->vport_type = ids->vport_type;
3374         if (fci->f->dd_fcvport_size)
3375                 vport->dd_data = &vport[1];
3376         vport->shost = shost;
3377         vport->channel = channel;
3378         vport->flags = FC_VPORT_CREATING;
3379         INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3380
3381         spin_lock_irqsave(shost->host_lock, flags);
3382
3383         if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3384                 spin_unlock_irqrestore(shost->host_lock, flags);
3385                 kfree(vport);
3386                 return -ENOSPC;
3387         }
3388         fc_host->npiv_vports_inuse++;
3389         vport->number = fc_host->next_vport_number++;
3390         list_add_tail(&vport->peers, &fc_host->vports);
3391         get_device(&shost->shost_gendev);       /* for fc_host->vport list */
3392
3393         spin_unlock_irqrestore(shost->host_lock, flags);
3394
3395         dev = &vport->dev;
3396         device_initialize(dev);                 /* takes self reference */
3397         dev->parent = get_device(pdev);         /* takes parent reference */
3398         dev->release = fc_vport_dev_release;
3399         dev_set_name(dev, "vport-%d:%d-%d",
3400                      shost->host_no, channel, vport->number);
3401         transport_setup_device(dev);
3402
3403         error = device_add(dev);
3404         if (error) {
3405                 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3406                 goto delete_vport;
3407         }
3408         transport_add_device(dev);
3409         transport_configure_device(dev);
3410
3411         error = fci->f->vport_create(vport, ids->disable);
3412         if (error) {
3413                 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3414                 goto delete_vport_all;
3415         }
3416
3417         /*
3418          * if the parent isn't the physical adapter's Scsi_Host, ensure
3419          * the Scsi_Host at least contains ia symlink to the vport.
3420          */
3421         if (pdev != &shost->shost_gendev) {
3422                 error = sysfs_create_link(&shost->shost_gendev.kobj,
3423                                  &dev->kobj, dev_name(dev));
3424                 if (error)
3425                         printk(KERN_ERR
3426                                 "%s: Cannot create vport symlinks for "
3427                                 "%s, err=%d\n",
3428                                 __func__, dev_name(dev), error);
3429         }
3430         spin_lock_irqsave(shost->host_lock, flags);
3431         vport->flags &= ~FC_VPORT_CREATING;
3432         spin_unlock_irqrestore(shost->host_lock, flags);
3433
3434         dev_printk(KERN_NOTICE, pdev,
3435                         "%s created via shost%d channel %d\n", dev_name(dev),
3436                         shost->host_no, channel);
3437
3438         *ret_vport = vport;
3439
3440         return 0;
3441
3442 delete_vport_all:
3443         transport_remove_device(dev);
3444         device_del(dev);
3445 delete_vport:
3446         transport_destroy_device(dev);
3447         spin_lock_irqsave(shost->host_lock, flags);
3448         list_del(&vport->peers);
3449         put_device(&shost->shost_gendev);       /* for fc_host->vport list */
3450         fc_host->npiv_vports_inuse--;
3451         spin_unlock_irqrestore(shost->host_lock, flags);
3452         put_device(dev->parent);
3453         kfree(vport);
3454
3455         return error;
3456 }
3457
3458 /**
3459  * fc_vport_create - Admin App or LLDD requests creation of a vport
3460  * @shost:      scsi host the virtual port is connected to.
3461  * @channel:    channel on shost port connected to.
3462  * @ids:        The world wide names, FC4 port roles, etc for
3463  *              the virtual port.
3464  *
3465  * Notes:
3466  *      This routine assumes no locks are held on entry.
3467  */
3468 struct fc_vport *
3469 fc_vport_create(struct Scsi_Host *shost, int channel,
3470         struct fc_vport_identifiers *ids)
3471 {
3472         int stat;
3473         struct fc_vport *vport;
3474
3475         stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3476                  ids, &vport);
3477         return stat ? NULL : vport;
3478 }
3479 EXPORT_SYMBOL(fc_vport_create);
3480
3481 /**
3482  * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3483  * @vport:      fc_vport to be terminated
3484  *
3485  * Calls the LLDD vport_delete() function, then deallocates and removes
3486  * the vport from the shost and object tree.
3487  *
3488  * Notes:
3489  *      This routine assumes no locks are held on entry.
3490  */
3491 int
3492 fc_vport_terminate(struct fc_vport *vport)
3493 {
3494         struct Scsi_Host *shost = vport_to_shost(vport);
3495         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3496         struct fc_internal *i = to_fc_internal(shost->transportt);
3497         struct device *dev = &vport->dev;
3498         unsigned long flags;
3499         int stat;
3500
3501         if (i->f->vport_delete)
3502                 stat = i->f->vport_delete(vport);
3503         else
3504                 stat = -ENOENT;
3505
3506         spin_lock_irqsave(shost->host_lock, flags);
3507         vport->flags &= ~FC_VPORT_DELETING;
3508         if (!stat) {
3509                 vport->flags |= FC_VPORT_DELETED;
3510                 list_del(&vport->peers);
3511                 fc_host->npiv_vports_inuse--;
3512                 put_device(&shost->shost_gendev);  /* for fc_host->vport list */
3513         }
3514         spin_unlock_irqrestore(shost->host_lock, flags);
3515
3516         if (stat)
3517                 return stat;
3518
3519         if (dev->parent != &shost->shost_gendev)
3520                 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3521         transport_remove_device(dev);
3522         device_del(dev);
3523         transport_destroy_device(dev);
3524
3525         /*
3526          * Removing our self-reference should mean our
3527          * release function gets called, which will drop the remaining
3528          * parent reference and free the data structure.
3529          */
3530         put_device(dev);                        /* for self-reference */
3531
3532         return 0; /* SUCCESS */
3533 }
3534 EXPORT_SYMBOL(fc_vport_terminate);
3535
3536 /**
3537  * fc_vport_sched_delete - workq-based delete request for a vport
3538  * @work:       vport to be deleted.
3539  */
3540 static void
3541 fc_vport_sched_delete(struct work_struct *work)
3542 {
3543         struct fc_vport *vport =
3544                 container_of(work, struct fc_vport, vport_delete_work);
3545         int stat;
3546
3547         stat = fc_vport_terminate(vport);
3548         if (stat)
3549                 dev_printk(KERN_ERR, vport->dev.parent,
3550                         "%s: %s could not be deleted created via "
3551                         "shost%d channel %d - error %d\n", __func__,
3552                         dev_name(&vport->dev), vport->shost->host_no,
3553                         vport->channel, stat);
3554 }
3555
3556
3557 /*
3558  * BSG support
3559  */
3560
3561
3562 /**
3563  * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3564  * @job:        fc_bsg_job that is to be torn down
3565  */
3566 static void
3567 fc_destroy_bsgjob(struct fc_bsg_job *job)
3568 {
3569         unsigned long flags;
3570
3571         spin_lock_irqsave(&job->job_lock, flags);
3572         if (job->ref_cnt) {
3573                 spin_unlock_irqrestore(&job->job_lock, flags);
3574                 return;
3575         }
3576         spin_unlock_irqrestore(&job->job_lock, flags);
3577
3578         put_device(job->dev);   /* release reference for the request */
3579
3580         kfree(job->request_payload.sg_list);
3581         kfree(job->reply_payload.sg_list);
3582         kfree(job);
3583 }
3584
3585 /**
3586  * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3587  *                  completed
3588  * @job:        fc_bsg_job that is complete
3589  */
3590 static void
3591 fc_bsg_jobdone(struct fc_bsg_job *job)
3592 {
3593         struct request *req = job->req;
3594         struct request *rsp = req->next_rq;
3595         int err;
3596
3597         err = job->req->errors = job->reply->result;
3598
3599         if (err < 0)
3600                 /* we're only returning the result field in the reply */
3601                 job->req->sense_len = sizeof(uint32_t);
3602         else
3603                 job->req->sense_len = job->reply_len;
3604
3605         /* we assume all request payload was transferred, residual == 0 */
3606         req->resid_len = 0;
3607
3608         if (rsp) {
3609                 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3610
3611                 /* set reply (bidi) residual */
3612                 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3613                                       rsp->resid_len);
3614         }
3615         blk_complete_request(req);
3616 }
3617
3618 /**
3619  * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3620  * @rq:        BSG request that holds the job to be destroyed
3621  */
3622 static void fc_bsg_softirq_done(struct request *rq)
3623 {
3624         struct fc_bsg_job *job = rq->special;
3625         unsigned long flags;
3626
3627         spin_lock_irqsave(&job->job_lock, flags);
3628         job->state_flags |= FC_RQST_STATE_DONE;
3629         job->ref_cnt--;
3630         spin_unlock_irqrestore(&job->job_lock, flags);
3631
3632         blk_end_request_all(rq, rq->errors);
3633         fc_destroy_bsgjob(job);
3634 }
3635
3636 /**
3637  * fc_bsg_job_timeout - handler for when a bsg request timesout
3638  * @req:        request that timed out
3639  */
3640 static enum blk_eh_timer_return
3641 fc_bsg_job_timeout(struct request *req)
3642 {
3643         struct fc_bsg_job *job = (void *) req->special;
3644         struct Scsi_Host *shost = job->shost;
3645         struct fc_internal *i = to_fc_internal(shost->transportt);
3646         unsigned long flags;
3647         int err = 0, done = 0;
3648
3649         if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3650                 return BLK_EH_RESET_TIMER;
3651
3652         spin_lock_irqsave(&job->job_lock, flags);
3653         if (job->state_flags & FC_RQST_STATE_DONE)
3654                 done = 1;
3655         else
3656                 job->ref_cnt++;
3657         spin_unlock_irqrestore(&job->job_lock, flags);
3658
3659         if (!done && i->f->bsg_timeout) {
3660                 /* call LLDD to abort the i/o as it has timed out */
3661                 err = i->f->bsg_timeout(job);
3662                 if (err == -EAGAIN) {
3663                         job->ref_cnt--;
3664                         return BLK_EH_RESET_TIMER;
3665                 } else if (err)
3666                         printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3667                                 "abort failed with status %d\n", err);
3668         }
3669
3670         /* the blk_end_sync_io() doesn't check the error */
3671         if (done)
3672                 return BLK_EH_NOT_HANDLED;
3673         else
3674                 return BLK_EH_HANDLED;
3675 }
3676
3677 static int
3678 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3679 {
3680         size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3681
3682         BUG_ON(!req->nr_phys_segments);
3683
3684         buf->sg_list = kzalloc(sz, GFP_KERNEL);
3685         if (!buf->sg_list)
3686                 return -ENOMEM;
3687         sg_init_table(buf->sg_list, req->nr_phys_segments);
3688         buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3689         buf->payload_len = blk_rq_bytes(req);
3690         return 0;
3691 }
3692
3693
3694 /**
3695  * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3696  *                   bsg request
3697  * @shost:      SCSI Host corresponding to the bsg object
3698  * @rport:      (optional) FC Remote Port corresponding to the bsg object
3699  * @req:        BSG request that needs a job structure
3700  */
3701 static int
3702 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3703         struct request *req)
3704 {
3705         struct fc_internal *i = to_fc_internal(shost->transportt);
3706         struct request *rsp = req->next_rq;
3707         struct fc_bsg_job *job;
3708         int ret;
3709
3710         BUG_ON(req->special);
3711
3712         job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3713                         GFP_KERNEL);
3714         if (!job)
3715                 return -ENOMEM;
3716
3717         /*
3718          * Note: this is a bit silly.
3719          * The request gets formatted as a SGIO v4 ioctl request, which
3720          * then gets reformatted as a blk request, which then gets
3721          * reformatted as a fc bsg request. And on completion, we have
3722          * to wrap return results such that SGIO v4 thinks it was a scsi
3723          * status.  I hope this was all worth it.
3724          */
3725
3726         req->special = job;
3727         job->shost = shost;
3728         job->rport = rport;
3729         job->req = req;
3730         if (i->f->dd_bsg_size)
3731                 job->dd_data = (void *)&job[1];
3732         spin_lock_init(&job->job_lock);
3733         job->request = (struct fc_bsg_request *)req->cmd;
3734         job->request_len = req->cmd_len;
3735         job->reply = req->sense;
3736         job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3737                                                  * allocated */
3738         if (req->bio) {
3739                 ret = fc_bsg_map_buffer(&job->request_payload, req);
3740                 if (ret)
3741                         goto failjob_rls_job;
3742         }
3743         if (rsp && rsp->bio) {
3744                 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3745                 if (ret)
3746                         goto failjob_rls_rqst_payload;
3747         }
3748         job->job_done = fc_bsg_jobdone;
3749         if (rport)
3750                 job->dev = &rport->dev;
3751         else
3752                 job->dev = &shost->shost_gendev;
3753         get_device(job->dev);           /* take a reference for the request */
3754
3755         job->ref_cnt = 1;
3756
3757         return 0;
3758
3759
3760 failjob_rls_rqst_payload:
3761         kfree(job->request_payload.sg_list);
3762 failjob_rls_job:
3763         kfree(job);
3764         return -ENOMEM;
3765 }
3766
3767
3768 enum fc_dispatch_result {
3769         FC_DISPATCH_BREAK,      /* on return, q is locked, break from q loop */
3770         FC_DISPATCH_LOCKED,     /* on return, q is locked, continue on */
3771         FC_DISPATCH_UNLOCKED,   /* on return, q is unlocked, continue on */
3772 };
3773
3774
3775 /**
3776  * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3777  * @q:          fc host request queue
3778  * @shost:      scsi host rport attached to
3779  * @job:        bsg job to be processed
3780  */
3781 static enum fc_dispatch_result
3782 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3783                          struct fc_bsg_job *job)
3784 {
3785         struct fc_internal *i = to_fc_internal(shost->transportt);
3786         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3787         int ret;
3788
3789         /* Validate the host command */
3790         switch (job->request->msgcode) {
3791         case FC_BSG_HST_ADD_RPORT:
3792                 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3793                 break;
3794
3795         case FC_BSG_HST_DEL_RPORT:
3796                 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3797                 break;
3798
3799         case FC_BSG_HST_ELS_NOLOGIN:
3800                 cmdlen += sizeof(struct fc_bsg_host_els);
3801                 /* there better be a xmt and rcv payloads */
3802                 if ((!job->request_payload.payload_len) ||
3803                     (!job->reply_payload.payload_len)) {
3804                         ret = -EINVAL;
3805                         goto fail_host_msg;
3806                 }
3807                 break;
3808
3809         case FC_BSG_HST_CT:
3810                 cmdlen += sizeof(struct fc_bsg_host_ct);
3811                 /* there better be xmt and rcv payloads */
3812                 if ((!job->request_payload.payload_len) ||
3813                     (!job->reply_payload.payload_len)) {
3814                         ret = -EINVAL;
3815                         goto fail_host_msg;
3816                 }
3817                 break;
3818
3819         case FC_BSG_HST_VENDOR:
3820                 cmdlen += sizeof(struct fc_bsg_host_vendor);
3821                 if ((shost->hostt->vendor_id == 0L) ||
3822                     (job->request->rqst_data.h_vendor.vendor_id !=
3823                         shost->hostt->vendor_id)) {
3824                         ret = -ESRCH;
3825                         goto fail_host_msg;
3826                 }
3827                 break;
3828
3829         default:
3830                 ret = -EBADR;
3831                 goto fail_host_msg;
3832         }
3833
3834         /* check if we really have all the request data needed */
3835         if (job->request_len < cmdlen) {
3836                 ret = -ENOMSG;
3837                 goto fail_host_msg;
3838         }
3839
3840         ret = i->f->bsg_request(job);
3841         if (!ret)
3842                 return FC_DISPATCH_UNLOCKED;
3843
3844 fail_host_msg:
3845         /* return the errno failure code as the only status */
3846         BUG_ON(job->reply_len < sizeof(uint32_t));
3847         job->reply->reply_payload_rcv_len = 0;
3848         job->reply->result = ret;
3849         job->reply_len = sizeof(uint32_t);
3850         fc_bsg_jobdone(job);
3851         return FC_DISPATCH_UNLOCKED;
3852 }
3853
3854
3855 /*
3856  * fc_bsg_goose_queue - restart rport queue in case it was stopped
3857  * @rport:      rport to be restarted
3858  */
3859 static void
3860 fc_bsg_goose_queue(struct fc_rport *rport)
3861 {
3862         if (!rport->rqst_q)
3863                 return;
3864
3865         /*
3866          * This get/put dance makes no sense
3867          */
3868         get_device(&rport->dev);
3869         blk_run_queue_async(rport->rqst_q);
3870         put_device(&rport->dev);
3871 }
3872
3873 /**
3874  * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3875  * @q:          rport request queue
3876  * @shost:      scsi host rport attached to
3877  * @rport:      rport request destined to
3878  * @job:        bsg job to be processed
3879  */
3880 static enum fc_dispatch_result
3881 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3882                          struct fc_rport *rport, struct fc_bsg_job *job)
3883 {
3884         struct fc_internal *i = to_fc_internal(shost->transportt);
3885         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3886         int ret;
3887
3888         /* Validate the rport command */
3889         switch (job->request->msgcode) {
3890         case FC_BSG_RPT_ELS:
3891                 cmdlen += sizeof(struct fc_bsg_rport_els);
3892                 goto check_bidi;
3893
3894         case FC_BSG_RPT_CT:
3895                 cmdlen += sizeof(struct fc_bsg_rport_ct);
3896 check_bidi:
3897                 /* there better be xmt and rcv payloads */
3898                 if ((!job->request_payload.payload_len) ||
3899                     (!job->reply_payload.payload_len)) {
3900                         ret = -EINVAL;
3901                         goto fail_rport_msg;
3902                 }
3903                 break;
3904         default:
3905                 ret = -EBADR;
3906                 goto fail_rport_msg;
3907         }
3908
3909         /* check if we really have all the request data needed */
3910         if (job->request_len < cmdlen) {
3911                 ret = -ENOMSG;
3912                 goto fail_rport_msg;
3913         }
3914
3915         ret = i->f->bsg_request(job);
3916         if (!ret)
3917                 return FC_DISPATCH_UNLOCKED;
3918
3919 fail_rport_msg:
3920         /* return the errno failure code as the only status */
3921         BUG_ON(job->reply_len < sizeof(uint32_t));
3922         job->reply->reply_payload_rcv_len = 0;
3923         job->reply->result = ret;
3924         job->reply_len = sizeof(uint32_t);
3925         fc_bsg_jobdone(job);
3926         return FC_DISPATCH_UNLOCKED;
3927 }
3928
3929
3930 /**
3931  * fc_bsg_request_handler - generic handler for bsg requests
3932  * @q:          request queue to manage
3933  * @shost:      Scsi_Host related to the bsg object
3934  * @rport:      FC remote port related to the bsg object (optional)
3935  * @dev:        device structure for bsg object
3936  */
3937 static void
3938 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3939                        struct fc_rport *rport, struct device *dev)
3940 {
3941         struct request *req;
3942         struct fc_bsg_job *job;
3943         enum fc_dispatch_result ret;
3944
3945         if (!get_device(dev))
3946                 return;
3947
3948         while (1) {
3949                 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3950                     !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3951                         break;
3952
3953                 req = blk_fetch_request(q);
3954                 if (!req)
3955                         break;
3956
3957                 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3958                         req->errors = -ENXIO;
3959                         spin_unlock_irq(q->queue_lock);
3960                         blk_end_request_all(req, -ENXIO);
3961                         spin_lock_irq(q->queue_lock);
3962                         continue;
3963                 }
3964
3965                 spin_unlock_irq(q->queue_lock);
3966
3967                 ret = fc_req_to_bsgjob(shost, rport, req);
3968                 if (ret) {
3969                         req->errors = ret;
3970                         blk_end_request_all(req, ret);
3971                         spin_lock_irq(q->queue_lock);
3972                         continue;
3973                 }
3974
3975                 job = req->special;
3976
3977                 /* check if we have the msgcode value at least */
3978                 if (job->request_len < sizeof(uint32_t)) {
3979                         BUG_ON(job->reply_len < sizeof(uint32_t));
3980                         job->reply->reply_payload_rcv_len = 0;
3981                         job->reply->result = -ENOMSG;
3982                         job->reply_len = sizeof(uint32_t);
3983                         fc_bsg_jobdone(job);
3984                         spin_lock_irq(q->queue_lock);
3985                         continue;
3986                 }
3987
3988                 /* the dispatch routines will unlock the queue_lock */
3989                 if (rport)
3990                         ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3991                 else
3992                         ret = fc_bsg_host_dispatch(q, shost, job);
3993
3994                 /* did dispatcher hit state that can't process any more */
3995                 if (ret == FC_DISPATCH_BREAK)
3996                         break;
3997
3998                 /* did dispatcher had released the lock */
3999                 if (ret == FC_DISPATCH_UNLOCKED)
4000                         spin_lock_irq(q->queue_lock);
4001         }
4002
4003         spin_unlock_irq(q->queue_lock);
4004         put_device(dev);
4005         spin_lock_irq(q->queue_lock);
4006 }
4007
4008
4009 /**
4010  * fc_bsg_host_handler - handler for bsg requests for a fc host
4011  * @q:          fc host request queue
4012  */
4013 static void
4014 fc_bsg_host_handler(struct request_queue *q)
4015 {
4016         struct Scsi_Host *shost = q->queuedata;
4017
4018         fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
4019 }
4020
4021
4022 /**
4023  * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4024  * @q:          rport request queue
4025  */
4026 static void
4027 fc_bsg_rport_handler(struct request_queue *q)
4028 {
4029         struct fc_rport *rport = q->queuedata;
4030         struct Scsi_Host *shost = rport_to_shost(rport);
4031
4032         fc_bsg_request_handler(q, shost, rport, &rport->dev);
4033 }
4034
4035
4036 /**
4037  * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4038  * @shost:      shost for fc_host
4039  * @fc_host:    fc_host adding the structures to
4040  */
4041 static int
4042 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4043 {
4044         struct device *dev = &shost->shost_gendev;
4045         struct fc_internal *i = to_fc_internal(shost->transportt);
4046         struct request_queue *q;
4047         int err;
4048         char bsg_name[20];
4049
4050         fc_host->rqst_q = NULL;
4051
4052         if (!i->f->bsg_request)
4053                 return -ENOTSUPP;
4054
4055         snprintf(bsg_name, sizeof(bsg_name),
4056                  "fc_host%d", shost->host_no);
4057
4058         q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4059         if (!q) {
4060                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4061                                 "initialize - no request queue\n",
4062                                  shost->host_no);
4063                 return -ENOMEM;
4064         }
4065
4066         q->queuedata = shost;
4067         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4068         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4069         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4070         blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4071
4072         err = bsg_register_queue(q, dev, bsg_name, NULL);
4073         if (err) {
4074                 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4075                                 "initialize - register queue\n",
4076                                 shost->host_no);
4077                 blk_cleanup_queue(q);
4078                 return err;
4079         }
4080
4081         fc_host->rqst_q = q;
4082         return 0;
4083 }
4084
4085
4086 /**
4087  * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4088  * @shost:      shost that rport is attached to
4089  * @rport:      rport that the bsg hooks are being attached to
4090  */
4091 static int
4092 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4093 {
4094         struct device *dev = &rport->dev;
4095         struct fc_internal *i = to_fc_internal(shost->transportt);
4096         struct request_queue *q;
4097         int err;
4098
4099         rport->rqst_q = NULL;
4100
4101         if (!i->f->bsg_request)
4102                 return -ENOTSUPP;
4103
4104         q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4105         if (!q) {
4106                 printk(KERN_ERR "%s: bsg interface failed to "
4107                                 "initialize - no request queue\n",
4108                                  dev->kobj.name);
4109                 return -ENOMEM;
4110         }
4111
4112         q->queuedata = rport;
4113         queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4114         blk_queue_softirq_done(q, fc_bsg_softirq_done);
4115         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4116         blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4117
4118         err = bsg_register_queue(q, dev, NULL, NULL);
4119         if (err) {
4120                 printk(KERN_ERR "%s: bsg interface failed to "
4121                                 "initialize - register queue\n",
4122                                  dev->kobj.name);
4123                 blk_cleanup_queue(q);
4124                 return err;
4125         }
4126
4127         rport->rqst_q = q;
4128         return 0;
4129 }
4130
4131
4132 /**
4133  * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4134  * @q:  the request_queue that is to be torn down.
4135  *
4136  * Notes:
4137  *   Before unregistering the queue empty any requests that are blocked
4138  *
4139  *
4140  */
4141 static void
4142 fc_bsg_remove(struct request_queue *q)
4143 {
4144         if (q) {
4145                 bsg_unregister_queue(q);
4146                 blk_cleanup_queue(q);
4147         }
4148 }
4149
4150
4151 /* Original Author:  Martin Hicks */
4152 MODULE_AUTHOR("James Smart");
4153 MODULE_DESCRIPTION("FC Transport Attributes");
4154 MODULE_LICENSE("GPL");
4155
4156 module_init(fc_transport_init);
4157 module_exit(fc_transport_exit);