drivers/scsi/scsi_transport_fc.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  FiberChannel transport specific attributes exported to sysfs.
   4  *
   5  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
   6  *
   7  *  ========
   8  *
   9  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
  10  *    Rewrite for host, target, device, and remote port attributes,
  11  *    statistics, and service functions...
  12  *    Add vports, etc
  13  */
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/slab.h>
  17 #include <linux/delay.h>
  18 #include <linux/kernel.h>
  19 #include <linux/bsg-lib.h>
  20 #include <scsi/scsi_device.h>
  21 #include <scsi/scsi_host.h>
  22 #include <scsi/scsi_transport.h>
  23 #include <scsi/scsi_transport_fc.h>
  24 #include <scsi/scsi_cmnd.h>
  25 #include <net/netlink.h>
  26 #include <scsi/scsi_netlink_fc.h>
  27 #include <scsi/scsi_bsg_fc.h>
  28 #include "scsi_priv.h"
  29
  30 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
  31 static void fc_vport_sched_delete(struct work_struct *work);
  32 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
  33         struct device *pdev, struct fc_vport_identifiers  *ids,
  34         struct fc_vport **vport);
  35 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
  36 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
  37 static void fc_bsg_remove(struct request_queue *);
  38 static void fc_bsg_goose_queue(struct fc_rport *);
  39
  40 /*
  41  * Module Parameters
  42  */
  43
  44 /*
  45  * dev_loss_tmo: the default number of seconds that the FC transport
  46  *   should insulate the loss of a remote port.
  47  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
  48  */
  49 static unsigned int fc_dev_loss_tmo = 60;               /* seconds */
  50
  51 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
  52 MODULE_PARM_DESC(dev_loss_tmo,
  53                  "Maximum number of seconds that the FC transport should"
  54                  " insulate the loss of a remote port. Once this value is"
  55                  " exceeded, the scsi target is removed. Value should be"
  56                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
  57                  " fast_io_fail_tmo is not set.");
  58
  59 /*
  60  * Redefine so that we can have same named attributes in the
  61  * sdev/starget/host objects.
  62  */
  63 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)                \
  64 struct device_attribute device_attr_##_prefix##_##_name =       \
  65         __ATTR(_name,_mode,_show,_store)
  66
  67 #define fc_enum_name_search(title, table_type, table)                   \
  68 static const char *get_fc_##title##_name(enum table_type table_key)     \
  69 {                                                                       \
  70         int i;                                                          \
  71         char *name = NULL;                                              \
  72                                                                         \
  73         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
  74                 if (table[i].value == table_key) {                      \
  75                         name = table[i].name;                           \
  76                         break;                                          \
  77                 }                                                       \
  78         }                                                               \
  79         return name;                                                    \
  80 }
  81
  82 #define fc_enum_name_match(title, table_type, table)                    \
  83 static int get_fc_##title##_match(const char *table_key,                \
  84                 enum table_type *value)                                 \
  85 {                                                                       \
  86         int i;                                                          \
  87                                                                         \
  88         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
  89                 if (strncmp(table_key, table[i].name,                   \
  90                                 table[i].matchlen) == 0) {              \
  91                         *value = table[i].value;                        \
  92                         return 0; /* success */                         \
  93                 }                                                       \
  94         }                                                               \
  95         return 1; /* failure */                                         \
  96 }
  97
  98
  99 /* Convert fc_port_type values to ascii string name */
 100 static struct {
 101         enum fc_port_type       value;
 102         char                    *name;
 103 } fc_port_type_names[] = {
 104         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
 105         { FC_PORTTYPE_OTHER,            "Other" },
 106         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
 107         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
 108         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
 109         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
 110         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection)" },
 111         { FC_PORTTYPE_NPIV,             "NPIV VPORT" },
 112 };
 113 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
 114 #define FC_PORTTYPE_MAX_NAMELEN         50
 115
 116 /* Reuse fc_port_type enum function for vport_type */
 117 #define get_fc_vport_type_name get_fc_port_type_name
 118
 119
 120 /* Convert fc_host_event_code values to ascii string name */
 121 static const struct {
 122         enum fc_host_event_code         value;
 123         char                            *name;
 124 } fc_host_event_code_names[] = {
 125         { FCH_EVT_LIP,                  "lip" },
 126         { FCH_EVT_LINKUP,               "link_up" },
 127         { FCH_EVT_LINKDOWN,             "link_down" },
 128         { FCH_EVT_LIPRESET,             "lip_reset" },
 129         { FCH_EVT_RSCN,                 "rscn" },
 130         { FCH_EVT_ADAPTER_CHANGE,       "adapter_chg" },
 131         { FCH_EVT_PORT_UNKNOWN,         "port_unknown" },
 132         { FCH_EVT_PORT_ONLINE,          "port_online" },
 133         { FCH_EVT_PORT_OFFLINE,         "port_offline" },
 134         { FCH_EVT_PORT_FABRIC,          "port_fabric" },
 135         { FCH_EVT_LINK_UNKNOWN,         "link_unknown" },
 136         { FCH_EVT_LINK_FPIN,            "link_FPIN" },
 137         { FCH_EVT_VENDOR_UNIQUE,        "vendor_unique" },
 138 };
 139 fc_enum_name_search(host_event_code, fc_host_event_code,
 140                 fc_host_event_code_names)
 141 #define FC_HOST_EVENT_CODE_MAX_NAMELEN  30
 142
 143
 144 /* Convert fc_port_state values to ascii string name */
 145 static struct {
 146         enum fc_port_state      value;
 147         char                    *name;
 148 } fc_port_state_names[] = {
 149         { FC_PORTSTATE_UNKNOWN,         "Unknown" },
 150         { FC_PORTSTATE_NOTPRESENT,      "Not Present" },
 151         { FC_PORTSTATE_ONLINE,          "Online" },
 152         { FC_PORTSTATE_OFFLINE,         "Offline" },
 153         { FC_PORTSTATE_BLOCKED,         "Blocked" },
 154         { FC_PORTSTATE_BYPASSED,        "Bypassed" },
 155         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics" },
 156         { FC_PORTSTATE_LINKDOWN,        "Linkdown" },
 157         { FC_PORTSTATE_ERROR,           "Error" },
 158         { FC_PORTSTATE_LOOPBACK,        "Loopback" },
 159         { FC_PORTSTATE_DELETED,         "Deleted" },
 160 };
 161 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
 162 #define FC_PORTSTATE_MAX_NAMELEN        20
 163
 164
 165 /* Convert fc_vport_state values to ascii string name */
 166 static struct {
 167         enum fc_vport_state     value;
 168         char                    *name;
 169 } fc_vport_state_names[] = {
 170         { FC_VPORT_UNKNOWN,             "Unknown" },
 171         { FC_VPORT_ACTIVE,              "Active" },
 172         { FC_VPORT_DISABLED,            "Disabled" },
 173         { FC_VPORT_LINKDOWN,            "Linkdown" },
 174         { FC_VPORT_INITIALIZING,        "Initializing" },
 175         { FC_VPORT_NO_FABRIC_SUPP,      "No Fabric Support" },
 176         { FC_VPORT_NO_FABRIC_RSCS,      "No Fabric Resources" },
 177         { FC_VPORT_FABRIC_LOGOUT,       "Fabric Logout" },
 178         { FC_VPORT_FABRIC_REJ_WWN,      "Fabric Rejected WWN" },
 179         { FC_VPORT_FAILED,              "VPort Failed" },
 180 };
 181 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
 182 #define FC_VPORTSTATE_MAX_NAMELEN       24
 183
 184 /* Reuse fc_vport_state enum function for vport_last_state */
 185 #define get_fc_vport_last_state_name get_fc_vport_state_name
 186
 187
 188 /* Convert fc_tgtid_binding_type values to ascii string name */
 189 static const struct {
 190         enum fc_tgtid_binding_type      value;
 191         char                            *name;
 192         int                             matchlen;
 193 } fc_tgtid_binding_type_names[] = {
 194         { FC_TGTID_BIND_NONE, "none", 4 },
 195         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
 196         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
 197         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
 198 };
 199 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
 200                 fc_tgtid_binding_type_names)
 201 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
 202                 fc_tgtid_binding_type_names)
 203 #define FC_BINDTYPE_MAX_NAMELEN 30
 204
 205
 206 #define fc_bitfield_name_search(title, table)                   \
 207 static ssize_t                                                  \
 208 get_fc_##title##_names(u32 table_key, char *buf)                \
 209 {                                                               \
 210         char *prefix = "";                                      \
 211         ssize_t len = 0;                                        \
 212         int i;                                                  \
 213                                                                 \
 214         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 215                 if (table[i].value & table_key) {               \
 216                         len += sprintf(buf + len, "%s%s",       \
 217                                 prefix, table[i].name);         \
 218                         prefix = ", ";                          \
 219                 }                                               \
 220         }                                                       \
 221         len += sprintf(buf + len, "\n");                        \
 222         return len;                                             \
 223 }
 224
 225
 226 /* Convert FC_COS bit values to ascii string name */
 227 static const struct {
 228         u32                     value;
 229         char                    *name;
 230 } fc_cos_names[] = {
 231         { FC_COS_CLASS1,        "Class 1" },
 232         { FC_COS_CLASS2,        "Class 2" },
 233         { FC_COS_CLASS3,        "Class 3" },
 234         { FC_COS_CLASS4,        "Class 4" },
 235         { FC_COS_CLASS6,        "Class 6" },
 236 };
 237 fc_bitfield_name_search(cos, fc_cos_names)
 238
 239
 240 /* Convert FC_PORTSPEED bit values to ascii string name */
 241 static const struct {
 242         u32                     value;
 243         char                    *name;
 244 } fc_port_speed_names[] = {
 245         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
 246         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
 247         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
 248         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
 249         { FC_PORTSPEED_8GBIT,           "8 Gbit" },
 250         { FC_PORTSPEED_16GBIT,          "16 Gbit" },
 251         { FC_PORTSPEED_32GBIT,          "32 Gbit" },
 252         { FC_PORTSPEED_20GBIT,          "20 Gbit" },
 253         { FC_PORTSPEED_40GBIT,          "40 Gbit" },
 254         { FC_PORTSPEED_50GBIT,          "50 Gbit" },
 255         { FC_PORTSPEED_100GBIT,         "100 Gbit" },
 256         { FC_PORTSPEED_25GBIT,          "25 Gbit" },
 257         { FC_PORTSPEED_64GBIT,          "64 Gbit" },
 258         { FC_PORTSPEED_128GBIT,         "128 Gbit" },
 259         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
 260 };
 261 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 262
 263
 264 static int
 265 show_fc_fc4s (char *buf, u8 *fc4_list)
 266 {
 267         int i, len=0;
 268
 269         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 270                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 271         len += sprintf(buf + len, "\n");
 272         return len;
 273 }
 274
 275
 276 /* Convert FC_PORT_ROLE bit values to ascii string name */
 277 static const struct {
 278         u32                     value;
 279         char                    *name;
 280 } fc_port_role_names[] = {
 281         { FC_PORT_ROLE_FCP_TARGET,              "FCP Target" },
 282         { FC_PORT_ROLE_FCP_INITIATOR,           "FCP Initiator" },
 283         { FC_PORT_ROLE_IP_PORT,                 "IP Port" },
 284         { FC_PORT_ROLE_FCP_DUMMY_INITIATOR,     "FCP Dummy Initiator" },
 285         { FC_PORT_ROLE_NVME_INITIATOR,          "NVMe Initiator" },
 286         { FC_PORT_ROLE_NVME_TARGET,             "NVMe Target" },
 287         { FC_PORT_ROLE_NVME_DISCOVERY,          "NVMe Discovery" },
 288 };
 289 fc_bitfield_name_search(port_roles, fc_port_role_names)
 290
 291 /*
 292  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 293  */
 294 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 295 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 296 #define FC_FPORT_PORTID                 0x00000e
 297 #define FC_FABCTLR_PORTID               0x00000d
 298 #define FC_DIRSRVR_PORTID               0x00000c
 299 #define FC_TIMESRVR_PORTID              0x00000b
 300 #define FC_MGMTSRVR_PORTID              0x00000a
 301
 302
 303 static void fc_timeout_deleted_rport(struct work_struct *work);
 304 static void fc_timeout_fail_rport_io(struct work_struct *work);
 305 static void fc_scsi_scan_rport(struct work_struct *work);
 306
 307 /*
 308  * Attribute counts pre object type...
 309  * Increase these values if you add attributes
 310  */
 311 #define FC_STARGET_NUM_ATTRS    3
 312 #define FC_RPORT_NUM_ATTRS      10
 313 #define FC_VPORT_NUM_ATTRS      9
 314 #define FC_HOST_NUM_ATTRS       29
 315
 316 struct fc_internal {
 317         struct scsi_transport_template t;
 318         struct fc_function_template *f;
 319
 320         /*
 321          * For attributes : each object has :
 322          *   An array of the actual attributes structures
 323          *   An array of null-terminated pointers to the attribute
 324          *     structures - used for mid-layer interaction.
 325          *
 326          * The attribute containers for the starget and host are are
 327          * part of the midlayer. As the remote port is specific to the
 328          * fc transport, we must provide the attribute container.
 329          */
 330         struct device_attribute private_starget_attrs[
 331                                                         FC_STARGET_NUM_ATTRS];
 332         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 333
 334         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 335         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 336
 337         struct transport_container rport_attr_cont;
 338         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 339         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 340
 341         struct transport_container vport_attr_cont;
 342         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
 343         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
 344 };
 345
 346 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 347
 348 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 349                            struct device *cdev)
 350 {
 351         struct scsi_target *starget = to_scsi_target(dev);
 352         struct fc_rport *rport = starget_to_rport(starget);
 353
 354         /*
 355          * if parent is remote port, use values from remote port.
 356          * Otherwise, this host uses the fc_transport, but not the
 357          * remote port interface. As such, initialize to known non-values.
 358          */
 359         if (rport) {
 360                 fc_starget_node_name(starget) = rport->node_name;
 361                 fc_starget_port_name(starget) = rport->port_name;
 362                 fc_starget_port_id(starget) = rport->port_id;
 363         } else {
 364                 fc_starget_node_name(starget) = -1;
 365                 fc_starget_port_name(starget) = -1;
 366                 fc_starget_port_id(starget) = -1;
 367         }
 368
 369         return 0;
 370 }
 371
 372 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 373                                "fc_transport",
 374                                fc_target_setup,
 375                                NULL,
 376                                NULL);
 377
 378 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 379                          struct device *cdev)
 380 {
 381         struct Scsi_Host *shost = dev_to_shost(dev);
 382         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 383
 384         /*
 385          * Set default values easily detected by the midlayer as
 386          * failure cases.  The scsi lldd is responsible for initializing
 387          * all transport attributes to valid values per host.
 388          */
 389         fc_host->node_name = -1;
 390         fc_host->port_name = -1;
 391         fc_host->permanent_port_name = -1;
 392         fc_host->supported_classes = FC_COS_UNSPECIFIED;
 393         memset(fc_host->supported_fc4s, 0,
 394                 sizeof(fc_host->supported_fc4s));
 395         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
 396         fc_host->maxframe_size = -1;
 397         fc_host->max_npiv_vports = 0;
 398         memset(fc_host->serial_number, 0,
 399                 sizeof(fc_host->serial_number));
 400         memset(fc_host->manufacturer, 0,
 401                 sizeof(fc_host->manufacturer));
 402         memset(fc_host->model, 0,
 403                 sizeof(fc_host->model));
 404         memset(fc_host->model_description, 0,
 405                 sizeof(fc_host->model_description));
 406         memset(fc_host->hardware_version, 0,
 407                 sizeof(fc_host->hardware_version));
 408         memset(fc_host->driver_version, 0,
 409                 sizeof(fc_host->driver_version));
 410         memset(fc_host->firmware_version, 0,
 411                 sizeof(fc_host->firmware_version));
 412         memset(fc_host->optionrom_version, 0,
 413                 sizeof(fc_host->optionrom_version));
 414
 415         fc_host->port_id = -1;
 416         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
 417         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
 418         memset(fc_host->active_fc4s, 0,
 419                 sizeof(fc_host->active_fc4s));
 420         fc_host->speed = FC_PORTSPEED_UNKNOWN;
 421         fc_host->fabric_name = -1;
 422         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
 423         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
 424
 425         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
 426
 427         INIT_LIST_HEAD(&fc_host->rports);
 428         INIT_LIST_HEAD(&fc_host->rport_bindings);
 429         INIT_LIST_HEAD(&fc_host->vports);
 430         fc_host->next_rport_number = 0;
 431         fc_host->next_target_id = 0;
 432         fc_host->next_vport_number = 0;
 433         fc_host->npiv_vports_inuse = 0;
 434
 435         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
 436                  "fc_wq_%d", shost->host_no);
 437         fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
 438         if (!fc_host->work_q)
 439                 return -ENOMEM;
 440
 441         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
 442         snprintf(fc_host->devloss_work_q_name,
 443                  sizeof(fc_host->devloss_work_q_name),
 444                  "fc_dl_%d", shost->host_no);
 445         fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
 446                                         fc_host->devloss_work_q_name);
 447         if (!fc_host->devloss_work_q) {
 448                 destroy_workqueue(fc_host->work_q);
 449                 fc_host->work_q = NULL;
 450                 return -ENOMEM;
 451         }
 452
 453         fc_bsg_hostadd(shost, fc_host);
 454         /* ignore any bsg add error - we just can't do sgio */
 455
 456         return 0;
 457 }
 458
 459 static int fc_host_remove(struct transport_container *tc, struct device *dev,
 460                          struct device *cdev)
 461 {
 462         struct Scsi_Host *shost = dev_to_shost(dev);
 463         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 464
 465         fc_bsg_remove(fc_host->rqst_q);
 466         return 0;
 467 }
 468
 469 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 470                                "fc_host",
 471                                fc_host_setup,
 472                                fc_host_remove,
 473                                NULL);
 474
 475 /*
 476  * Setup and Remove actions for remote ports are handled
 477  * in the service functions below.
 478  */
 479 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 480                                "fc_remote_ports",
 481                                NULL,
 482                                NULL,
 483                                NULL);
 484
 485 /*
 486  * Setup and Remove actions for virtual ports are handled
 487  * in the service functions below.
 488  */
 489 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
 490                                "fc_vports",
 491                                NULL,
 492                                NULL,
 493                                NULL);
 494
 495 /*
 496  * Netlink Infrastructure
 497  */
 498
 499 static atomic_t fc_event_seq;
 500
 501 /**
 502  * fc_get_event_number - Obtain the next sequential FC event number
 503  *
 504  * Notes:
 505  *   We could have inlined this, but it would have required fc_event_seq to
 506  *   be exposed. For now, live with the subroutine call.
 507  *   Atomic used to avoid lock/unlock...
 508  */
 509 u32
 510 fc_get_event_number(void)
 511 {
 512         return atomic_add_return(1, &fc_event_seq);
 513 }
 514 EXPORT_SYMBOL(fc_get_event_number);
 515
 516 /**
 517  * fc_host_post_fc_event - routine to do the work of posting an event
 518  *                      on an fc_host.
 519  * @shost:              host the event occurred on
 520  * @event_number:       fc event number obtained from get_fc_event_number()
 521  * @event_code:         fc_host event being posted
 522  * @data_len:           amount, in bytes, of event data
 523  * @data_buf:           pointer to event data
 524  * @vendor_id:          value for Vendor id
 525  *
 526  * Notes:
 527  *      This routine assumes no locks are held on entry.
 528  */
 529 void
 530 fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
 531                 enum fc_host_event_code event_code,
 532                 u32 data_len, char *data_buf, u64 vendor_id)
 533 {
 534         struct sk_buff *skb;
 535         struct nlmsghdr *nlh;
 536         struct fc_nl_event *event;
 537         const char *name;
 538         u32 len;
 539         int err;
 540
 541         if (!data_buf || data_len < 4)
 542                 data_len = 0;
 543
 544         if (!scsi_nl_sock) {
 545                 err = -ENOENT;
 546                 goto send_fail;
 547         }
 548
 549         len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
 550
 551         skb = nlmsg_new(len, GFP_KERNEL);
 552         if (!skb) {
 553                 err = -ENOBUFS;
 554                 goto send_fail;
 555         }
 556
 557         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 558         if (!nlh) {
 559                 err = -ENOBUFS;
 560                 goto send_fail_skb;
 561         }
 562         event = nlmsg_data(nlh);
 563
 564         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 565                                 FC_NL_ASYNC_EVENT, len);
 566         event->seconds = ktime_get_real_seconds();
 567         event->vendor_id = vendor_id;
 568         event->host_no = shost->host_no;
 569         event->event_datalen = data_len;        /* bytes */
 570         event->event_num = event_number;
 571         event->event_code = event_code;
 572         if (data_len)
 573                 memcpy(&event->event_data, data_buf, data_len);
 574
 575         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 576                         GFP_KERNEL);
 577         return;
 578
 579 send_fail_skb:
 580         kfree_skb(skb);
 581 send_fail:
 582         name = get_fc_host_event_code_name(event_code);
 583         printk(KERN_WARNING
 584                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
 585                 __func__, shost->host_no,
 586                 (name) ? name : "<unknown>",
 587                 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err);
 588         return;
 589 }
 590 EXPORT_SYMBOL(fc_host_post_fc_event);
 591
 592 /**
 593  * fc_host_post_event - called to post an even on an fc_host.
 594  * @shost:              host the event occurred on
 595  * @event_number:       fc event number obtained from get_fc_event_number()
 596  * @event_code:         fc_host event being posted
 597  * @event_data:         32bits of data for the event being posted
 598  *
 599  * Notes:
 600  *      This routine assumes no locks are held on entry.
 601  */
 602 void
 603 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 604                 enum fc_host_event_code event_code, u32 event_data)
 605 {
 606         fc_host_post_fc_event(shost, event_number, event_code,
 607                 (u32)sizeof(u32), (char *)&event_data, 0);
 608 }
 609 EXPORT_SYMBOL(fc_host_post_event);
 610
 611
 612 /**
 613  * fc_host_post_vendor_event - called to post a vendor unique event
 614  *                      on an fc_host
 615  * @shost:              host the event occurred on
 616  * @event_number:       fc event number obtained from get_fc_event_number()
 617  * @data_len:           amount, in bytes, of vendor unique data
 618  * @data_buf:           pointer to vendor unique data
 619  * @vendor_id:          Vendor id
 620  *
 621  * Notes:
 622  *      This routine assumes no locks are held on entry.
 623  */
 624 void
 625 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 626                 u32 data_len, char * data_buf, u64 vendor_id)
 627 {
 628         fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE,
 629                 data_len, data_buf, vendor_id);
 630 }
 631 EXPORT_SYMBOL(fc_host_post_vendor_event);
 632
 633 /**
 634  * fc_host_rcv_fpin - routine to process a received FPIN.
 635  * @shost:              host the FPIN was received on
 636  * @fpin_len:           length of FPIN payload, in bytes
 637  * @fpin_buf:           pointer to FPIN payload
 638  *
 639  * Notes:
 640  *      This routine assumes no locks are held on entry.
 641  */
 642 void
 643 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf)
 644 {
 645         fc_host_post_fc_event(shost, fc_get_event_number(),
 646                                 FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0);
 647 }
 648 EXPORT_SYMBOL(fc_host_fpin_rcv);
 649
 650
 651 static __init int fc_transport_init(void)
 652 {
 653         int error;
 654
 655         atomic_set(&fc_event_seq, 0);
 656
 657         error = transport_class_register(&fc_host_class);
 658         if (error)
 659                 return error;
 660         error = transport_class_register(&fc_vport_class);
 661         if (error)
 662                 goto unreg_host_class;
 663         error = transport_class_register(&fc_rport_class);
 664         if (error)
 665                 goto unreg_vport_class;
 666         error = transport_class_register(&fc_transport_class);
 667         if (error)
 668                 goto unreg_rport_class;
 669         return 0;
 670
 671 unreg_rport_class:
 672         transport_class_unregister(&fc_rport_class);
 673 unreg_vport_class:
 674         transport_class_unregister(&fc_vport_class);
 675 unreg_host_class:
 676         transport_class_unregister(&fc_host_class);
 677         return error;
 678 }
 679
 680 static void __exit fc_transport_exit(void)
 681 {
 682         transport_class_unregister(&fc_transport_class);
 683         transport_class_unregister(&fc_rport_class);
 684         transport_class_unregister(&fc_host_class);
 685         transport_class_unregister(&fc_vport_class);
 686 }
 687
 688 /*
 689  * FC Remote Port Attribute Management
 690  */
 691
 692 #define fc_rport_show_function(field, format_string, sz, cast)          \
 693 static ssize_t                                                          \
 694 show_fc_rport_##field (struct device *dev,                              \
 695                        struct device_attribute *attr, char *buf)        \
 696 {                                                                       \
 697         struct fc_rport *rport = transport_class_to_rport(dev);         \
 698         struct Scsi_Host *shost = rport_to_shost(rport);                \
 699         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 700         if ((i->f->get_rport_##field) &&                                \
 701             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 702               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 703               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 704                 i->f->get_rport_##field(rport);                         \
 705         return snprintf(buf, sz, format_string, cast rport->field);     \
 706 }
 707
 708 #define fc_rport_store_function(field)                                  \
 709 static ssize_t                                                          \
 710 store_fc_rport_##field(struct device *dev,                              \
 711                        struct device_attribute *attr,                   \
 712                        const char *buf, size_t count)                   \
 713 {                                                                       \
 714         int val;                                                        \
 715         struct fc_rport *rport = transport_class_to_rport(dev);         \
 716         struct Scsi_Host *shost = rport_to_shost(rport);                \
 717         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 718         char *cp;                                                       \
 719         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
 720             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
 721             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
 722                 return -EBUSY;                                          \
 723         val = simple_strtoul(buf, &cp, 0);                              \
 724         if (*cp && (*cp != '\n'))                                       \
 725                 return -EINVAL;                                         \
 726         i->f->set_rport_##field(rport, val);                            \
 727         return count;                                                   \
 728 }
 729
 730 #define fc_rport_rd_attr(field, format_string, sz)                      \
 731         fc_rport_show_function(field, format_string, sz, )              \
 732 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 733                          show_fc_rport_##field, NULL)
 734
 735 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
 736         fc_rport_show_function(field, format_string, sz, (cast))        \
 737 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 738                           show_fc_rport_##field, NULL)
 739
 740 #define fc_rport_rw_attr(field, format_string, sz)                      \
 741         fc_rport_show_function(field, format_string, sz, )              \
 742         fc_rport_store_function(field)                                  \
 743 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
 744                         show_fc_rport_##field,                          \
 745                         store_fc_rport_##field)
 746
 747
 748 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
 749 static ssize_t                                                          \
 750 show_fc_rport_##field (struct device *dev,                              \
 751                        struct device_attribute *attr, char *buf)        \
 752 {                                                                       \
 753         struct fc_rport *rport = transport_class_to_rport(dev);         \
 754         return snprintf(buf, sz, format_string, cast rport->field);     \
 755 }
 756
 757 #define fc_private_rport_rd_attr(field, format_string, sz)              \
 758         fc_private_rport_show_function(field, format_string, sz, )      \
 759 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 760                          show_fc_rport_##field, NULL)
 761
 762 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
 763         fc_private_rport_show_function(field, format_string, sz, (cast)) \
 764 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 765                           show_fc_rport_##field, NULL)
 766
 767
 768 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
 769 static ssize_t                                                          \
 770 show_fc_rport_##title (struct device *dev,                              \
 771                        struct device_attribute *attr, char *buf)        \
 772 {                                                                       \
 773         struct fc_rport *rport = transport_class_to_rport(dev);         \
 774         const char *name;                                               \
 775         name = get_fc_##title##_name(rport->title);                     \
 776         if (!name)                                                      \
 777                 return -EINVAL;                                         \
 778         return snprintf(buf, maxlen, "%s\n", name);                     \
 779 }                                                                       \
 780 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
 781                         show_fc_rport_##title, NULL)
 782
 783
 784 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
 785         i->private_rport_attrs[count] = device_attr_rport_##field; \
 786         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 787         i->private_rport_attrs[count].store = NULL;                     \
 788         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 789         if (i->f->show_rport_##field)                                   \
 790                 count++
 791
 792 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
 793         i->private_rport_attrs[count] = device_attr_rport_##field; \
 794         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 795         i->private_rport_attrs[count].store = NULL;                     \
 796         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 797         count++
 798
 799 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
 800         i->private_rport_attrs[count] = device_attr_rport_##field; \
 801         if (!i->f->set_rport_##field) {                                 \
 802                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
 803                 i->private_rport_attrs[count].store = NULL;             \
 804         }                                                               \
 805         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 806         if (i->f->show_rport_##field)                                   \
 807                 count++
 808
 809 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
 810 {                                                                       \
 811         i->private_rport_attrs[count] = device_attr_rport_##field; \
 812         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 813         count++;                                                        \
 814 }
 815
 816
 817 /* The FC Transport Remote Port Attributes: */
 818
 819 /* Fixed Remote Port Attributes */
 820
 821 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
 822
 823 static ssize_t
 824 show_fc_rport_supported_classes (struct device *dev,
 825                                  struct device_attribute *attr, char *buf)
 826 {
 827         struct fc_rport *rport = transport_class_to_rport(dev);
 828         if (rport->supported_classes == FC_COS_UNSPECIFIED)
 829                 return snprintf(buf, 20, "unspecified\n");
 830         return get_fc_cos_names(rport->supported_classes, buf);
 831 }
 832 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
 833                 show_fc_rport_supported_classes, NULL);
 834
 835 /* Dynamic Remote Port Attributes */
 836
 837 /*
 838  * dev_loss_tmo attribute
 839  */
 840 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
 841 {
 842         char *cp;
 843
 844         *val = simple_strtoul(buf, &cp, 0);
 845         if (*cp && (*cp != '\n'))
 846                 return -EINVAL;
 847         /*
 848          * Check for overflow; dev_loss_tmo is u32
 849          */
 850         if (*val > UINT_MAX)
 851                 return -EINVAL;
 852
 853         return 0;
 854 }
 855
 856 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
 857                                      unsigned long val)
 858 {
 859         struct Scsi_Host *shost = rport_to_shost(rport);
 860         struct fc_internal *i = to_fc_internal(shost->transportt);
 861
 862         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 863             (rport->port_state == FC_PORTSTATE_DELETED) ||
 864             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 865                 return -EBUSY;
 866         /*
 867          * Check for overflow; dev_loss_tmo is u32
 868          */
 869         if (val > UINT_MAX)
 870                 return -EINVAL;
 871
 872         /*
 873          * If fast_io_fail is off we have to cap
 874          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
 875          */
 876         if (rport->fast_io_fail_tmo == -1 &&
 877             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
 878                 return -EINVAL;
 879
 880         i->f->set_rport_dev_loss_tmo(rport, val);
 881         return 0;
 882 }
 883
 884 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
 885 static ssize_t
 886 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 887                             const char *buf, size_t count)
 888 {
 889         struct fc_rport *rport = transport_class_to_rport(dev);
 890         unsigned long val;
 891         int rc;
 892
 893         rc = fc_str_to_dev_loss(buf, &val);
 894         if (rc)
 895                 return rc;
 896
 897         rc = fc_rport_set_dev_loss_tmo(rport, val);
 898         if (rc)
 899                 return rc;
 900         return count;
 901 }
 902 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
 903                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
 904
 905
 906 /* Private Remote Port Attributes */
 907
 908 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 909 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 910 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
 911
 912 static ssize_t
 913 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
 914                      char *buf)
 915 {
 916         struct fc_rport *rport = transport_class_to_rport(dev);
 917
 918         /* identify any roles that are port_id specific */
 919         if ((rport->port_id != -1) &&
 920             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
 921                                         FC_WELLKNOWN_PORTID_MASK) {
 922                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
 923                 case FC_FPORT_PORTID:
 924                         return snprintf(buf, 30, "Fabric Port\n");
 925                 case FC_FABCTLR_PORTID:
 926                         return snprintf(buf, 30, "Fabric Controller\n");
 927                 case FC_DIRSRVR_PORTID:
 928                         return snprintf(buf, 30, "Directory Server\n");
 929                 case FC_TIMESRVR_PORTID:
 930                         return snprintf(buf, 30, "Time Server\n");
 931                 case FC_MGMTSRVR_PORTID:
 932                         return snprintf(buf, 30, "Management Server\n");
 933                 default:
 934                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
 935                 }
 936         } else {
 937                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
 938                         return snprintf(buf, 20, "unknown\n");
 939                 return get_fc_port_roles_names(rport->roles, buf);
 940         }
 941 }
 942 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
 943                 show_fc_rport_roles, NULL);
 944
 945 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 946 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
 947
 948 /*
 949  * fast_io_fail_tmo attribute
 950  */
 951 static ssize_t
 952 show_fc_rport_fast_io_fail_tmo (struct device *dev,
 953                                 struct device_attribute *attr, char *buf)
 954 {
 955         struct fc_rport *rport = transport_class_to_rport(dev);
 956
 957         if (rport->fast_io_fail_tmo == -1)
 958                 return snprintf(buf, 5, "off\n");
 959         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
 960 }
 961
 962 static ssize_t
 963 store_fc_rport_fast_io_fail_tmo(struct device *dev,
 964                                 struct device_attribute *attr, const char *buf,
 965                                 size_t count)
 966 {
 967         int val;
 968         char *cp;
 969         struct fc_rport *rport = transport_class_to_rport(dev);
 970
 971         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 972             (rport->port_state == FC_PORTSTATE_DELETED) ||
 973             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 974                 return -EBUSY;
 975         if (strncmp(buf, "off", 3) == 0)
 976                 rport->fast_io_fail_tmo = -1;
 977         else {
 978                 val = simple_strtoul(buf, &cp, 0);
 979                 if ((*cp && (*cp != '\n')) || (val < 0))
 980                         return -EINVAL;
 981                 /*
 982                  * Cap fast_io_fail by dev_loss_tmo or
 983                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 984                  */
 985                 if ((val >= rport->dev_loss_tmo) ||
 986                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
 987                         return -EINVAL;
 988
 989                 rport->fast_io_fail_tmo = val;
 990         }
 991         return count;
 992 }
 993 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
 994         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
 995
 996
 997 /*
 998  * FC SCSI Target Attribute Management
 999  */
1000
1001 /*
1002  * Note: in the target show function we recognize when the remote
1003  *  port is in the hierarchy and do not allow the driver to get
1004  *  involved in sysfs functions. The driver only gets involved if
1005  *  it's the "old" style that doesn't use rports.
1006  */
1007 #define fc_starget_show_function(field, format_string, sz, cast)        \
1008 static ssize_t                                                          \
1009 show_fc_starget_##field (struct device *dev,                            \
1010                          struct device_attribute *attr, char *buf)      \
1011 {                                                                       \
1012         struct scsi_target *starget = transport_class_to_starget(dev);  \
1013         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1014         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1015         struct fc_rport *rport = starget_to_rport(starget);             \
1016         if (rport)                                                      \
1017                 fc_starget_##field(starget) = rport->field;             \
1018         else if (i->f->get_starget_##field)                             \
1019                 i->f->get_starget_##field(starget);                     \
1020         return snprintf(buf, sz, format_string,                         \
1021                 cast fc_starget_##field(starget));                      \
1022 }
1023
1024 #define fc_starget_rd_attr(field, format_string, sz)                    \
1025         fc_starget_show_function(field, format_string, sz, )            \
1026 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1027                          show_fc_starget_##field, NULL)
1028
1029 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1030         fc_starget_show_function(field, format_string, sz, (cast))      \
1031 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1032                           show_fc_starget_##field, NULL)
1033
1034 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1035         i->private_starget_attrs[count] = device_attr_starget_##field; \
1036         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1037         i->private_starget_attrs[count].store = NULL;                   \
1038         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1039         if (i->f->show_starget_##field)                                 \
1040                 count++
1041
1042 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1043         i->private_starget_attrs[count] = device_attr_starget_##field; \
1044         if (!i->f->set_starget_##field) {                               \
1045                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1046                 i->private_starget_attrs[count].store = NULL;           \
1047         }                                                               \
1048         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1049         if (i->f->show_starget_##field)                                 \
1050                 count++
1051
1052 /* The FC Transport SCSI Target Attributes: */
1053 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1054 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1055 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1056
1057
1058 /*
1059  * FC Virtual Port Attribute Management
1060  */
1061
1062 #define fc_vport_show_function(field, format_string, sz, cast)          \
1063 static ssize_t                                                          \
1064 show_fc_vport_##field (struct device *dev,                              \
1065                        struct device_attribute *attr, char *buf)        \
1066 {                                                                       \
1067         struct fc_vport *vport = transport_class_to_vport(dev);         \
1068         struct Scsi_Host *shost = vport_to_shost(vport);                \
1069         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1070         if ((i->f->get_vport_##field) &&                                \
1071             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1072                 i->f->get_vport_##field(vport);                         \
1073         return snprintf(buf, sz, format_string, cast vport->field);     \
1074 }
1075
1076 #define fc_vport_store_function(field)                                  \
1077 static ssize_t                                                          \
1078 store_fc_vport_##field(struct device *dev,                              \
1079                        struct device_attribute *attr,                   \
1080                        const char *buf, size_t count)                   \
1081 {                                                                       \
1082         int val;                                                        \
1083         struct fc_vport *vport = transport_class_to_vport(dev);         \
1084         struct Scsi_Host *shost = vport_to_shost(vport);                \
1085         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1086         char *cp;                                                       \
1087         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1088                 return -EBUSY;                                          \
1089         val = simple_strtoul(buf, &cp, 0);                              \
1090         if (*cp && (*cp != '\n'))                                       \
1091                 return -EINVAL;                                         \
1092         i->f->set_vport_##field(vport, val);                            \
1093         return count;                                                   \
1094 }
1095
1096 #define fc_vport_store_str_function(field, slen)                        \
1097 static ssize_t                                                          \
1098 store_fc_vport_##field(struct device *dev,                              \
1099                        struct device_attribute *attr,                   \
1100                        const char *buf, size_t count)                   \
1101 {                                                                       \
1102         struct fc_vport *vport = transport_class_to_vport(dev);         \
1103         struct Scsi_Host *shost = vport_to_shost(vport);                \
1104         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1105         unsigned int cnt=count;                                         \
1106                                                                         \
1107         /* count may include a LF at end of string */                   \
1108         if (buf[cnt-1] == '\n')                                         \
1109                 cnt--;                                                  \
1110         if (cnt > ((slen) - 1))                                         \
1111                 return -EINVAL;                                         \
1112         memcpy(vport->field, buf, cnt);                                 \
1113         i->f->set_vport_##field(vport);                                 \
1114         return count;                                                   \
1115 }
1116
1117 #define fc_vport_rd_attr(field, format_string, sz)                      \
1118         fc_vport_show_function(field, format_string, sz, )              \
1119 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1120                          show_fc_vport_##field, NULL)
1121
1122 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1123         fc_vport_show_function(field, format_string, sz, (cast))        \
1124 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1125                           show_fc_vport_##field, NULL)
1126
1127 #define fc_vport_rw_attr(field, format_string, sz)                      \
1128         fc_vport_show_function(field, format_string, sz, )              \
1129         fc_vport_store_function(field)                                  \
1130 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1131                         show_fc_vport_##field,                          \
1132                         store_fc_vport_##field)
1133
1134 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1135 static ssize_t                                                          \
1136 show_fc_vport_##field (struct device *dev,                              \
1137                        struct device_attribute *attr, char *buf)        \
1138 {                                                                       \
1139         struct fc_vport *vport = transport_class_to_vport(dev);         \
1140         return snprintf(buf, sz, format_string, cast vport->field);     \
1141 }
1142
1143 #define fc_private_vport_store_u32_function(field)                      \
1144 static ssize_t                                                          \
1145 store_fc_vport_##field(struct device *dev,                              \
1146                        struct device_attribute *attr,                   \
1147                        const char *buf, size_t count)                   \
1148 {                                                                       \
1149         u32 val;                                                        \
1150         struct fc_vport *vport = transport_class_to_vport(dev);         \
1151         char *cp;                                                       \
1152         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1153                 return -EBUSY;                                          \
1154         val = simple_strtoul(buf, &cp, 0);                              \
1155         if (*cp && (*cp != '\n'))                                       \
1156                 return -EINVAL;                                         \
1157         vport->field = val;                                             \
1158         return count;                                                   \
1159 }
1160
1161
1162 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1163         fc_private_vport_show_function(field, format_string, sz, )      \
1164 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1165                          show_fc_vport_##field, NULL)
1166
1167 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1168         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1169 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1170                           show_fc_vport_##field, NULL)
1171
1172 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1173         fc_private_vport_show_function(field, format_string, sz, )      \
1174         fc_private_vport_store_u32_function(field)                      \
1175 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1176                         show_fc_vport_##field,                          \
1177                         store_fc_vport_##field)
1178
1179
1180 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1181 static ssize_t                                                          \
1182 show_fc_vport_##title (struct device *dev,                              \
1183                        struct device_attribute *attr,                   \
1184                        char *buf)                                       \
1185 {                                                                       \
1186         struct fc_vport *vport = transport_class_to_vport(dev);         \
1187         const char *name;                                               \
1188         name = get_fc_##title##_name(vport->title);                     \
1189         if (!name)                                                      \
1190                 return -EINVAL;                                         \
1191         return snprintf(buf, maxlen, "%s\n", name);                     \
1192 }                                                                       \
1193 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1194                         show_fc_vport_##title, NULL)
1195
1196
1197 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1198         i->private_vport_attrs[count] = device_attr_vport_##field; \
1199         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1200         i->private_vport_attrs[count].store = NULL;                     \
1201         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1202         if (i->f->get_##field)                                          \
1203                 count++
1204         /* NOTE: Above MACRO differs: checks function not show bit */
1205
1206 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1207         i->private_vport_attrs[count] = device_attr_vport_##field; \
1208         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1209         i->private_vport_attrs[count].store = NULL;                     \
1210         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1211         count++
1212
1213 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1214         i->private_vport_attrs[count] = device_attr_vport_##field; \
1215         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1216         if (i->f->field)                                                \
1217                 count++
1218         /* NOTE: Above MACRO differs: checks function */
1219
1220 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1221         i->private_vport_attrs[count] = device_attr_vport_##field; \
1222         if (!i->f->set_vport_##field) {                                 \
1223                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1224                 i->private_vport_attrs[count].store = NULL;             \
1225         }                                                               \
1226         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1227         count++
1228         /* NOTE: Above MACRO differs: does not check show bit */
1229
1230 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1231 {                                                                       \
1232         i->private_vport_attrs[count] = device_attr_vport_##field; \
1233         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1234         count++;                                                        \
1235 }
1236
1237
1238 /* The FC Transport Virtual Port Attributes: */
1239
1240 /* Fixed Virtual Port Attributes */
1241
1242 /* Dynamic Virtual Port Attributes */
1243
1244 /* Private Virtual Port Attributes */
1245
1246 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1247 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1248 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1249 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1250
1251 static ssize_t
1252 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1253                      char *buf)
1254 {
1255         struct fc_vport *vport = transport_class_to_vport(dev);
1256
1257         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1258                 return snprintf(buf, 20, "unknown\n");
1259         return get_fc_port_roles_names(vport->roles, buf);
1260 }
1261 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1262
1263 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1264
1265 fc_private_vport_show_function(symbolic_name, "%s\n",
1266                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1267 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1268 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1269                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1270
1271 static ssize_t
1272 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1273                       const char *buf, size_t count)
1274 {
1275         struct fc_vport *vport = transport_class_to_vport(dev);
1276         struct Scsi_Host *shost = vport_to_shost(vport);
1277         unsigned long flags;
1278
1279         spin_lock_irqsave(shost->host_lock, flags);
1280         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) {
1281                 spin_unlock_irqrestore(shost->host_lock, flags);
1282                 return -EBUSY;
1283         }
1284         vport->flags |= FC_VPORT_DELETING;
1285         spin_unlock_irqrestore(shost->host_lock, flags);
1286
1287         fc_queue_work(shost, &vport->vport_delete_work);
1288         return count;
1289 }
1290 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1291                         NULL, store_fc_vport_delete);
1292
1293
1294 /*
1295  * Enable/Disable vport
1296  *  Write "1" to disable, write "0" to enable
1297  */
1298 static ssize_t
1299 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1300                        const char *buf,
1301                            size_t count)
1302 {
1303         struct fc_vport *vport = transport_class_to_vport(dev);
1304         struct Scsi_Host *shost = vport_to_shost(vport);
1305         struct fc_internal *i = to_fc_internal(shost->transportt);
1306         int stat;
1307
1308         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1309                 return -EBUSY;
1310
1311         if (*buf == '0') {
1312                 if (vport->vport_state != FC_VPORT_DISABLED)
1313                         return -EALREADY;
1314         } else if (*buf == '1') {
1315                 if (vport->vport_state == FC_VPORT_DISABLED)
1316                         return -EALREADY;
1317         } else
1318                 return -EINVAL;
1319
1320         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1321         return stat ? stat : count;
1322 }
1323 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1324                         NULL, store_fc_vport_disable);
1325
1326
1327 /*
1328  * Host Attribute Management
1329  */
1330
1331 #define fc_host_show_function(field, format_string, sz, cast)           \
1332 static ssize_t                                                          \
1333 show_fc_host_##field (struct device *dev,                               \
1334                       struct device_attribute *attr, char *buf)         \
1335 {                                                                       \
1336         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1337         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1338         if (i->f->get_host_##field)                                     \
1339                 i->f->get_host_##field(shost);                          \
1340         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1341 }
1342
1343 #define fc_host_store_function(field)                                   \
1344 static ssize_t                                                          \
1345 store_fc_host_##field(struct device *dev,                               \
1346                       struct device_attribute *attr,                    \
1347                       const char *buf,  size_t count)                   \
1348 {                                                                       \
1349         int val;                                                        \
1350         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1351         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1352         char *cp;                                                       \
1353                                                                         \
1354         val = simple_strtoul(buf, &cp, 0);                              \
1355         if (*cp && (*cp != '\n'))                                       \
1356                 return -EINVAL;                                         \
1357         i->f->set_host_##field(shost, val);                             \
1358         return count;                                                   \
1359 }
1360
1361 #define fc_host_store_str_function(field, slen)                         \
1362 static ssize_t                                                          \
1363 store_fc_host_##field(struct device *dev,                               \
1364                       struct device_attribute *attr,                    \
1365                       const char *buf, size_t count)                    \
1366 {                                                                       \
1367         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1368         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1369         unsigned int cnt=count;                                         \
1370                                                                         \
1371         /* count may include a LF at end of string */                   \
1372         if (buf[cnt-1] == '\n')                                         \
1373                 cnt--;                                                  \
1374         if (cnt > ((slen) - 1))                                         \
1375                 return -EINVAL;                                         \
1376         memcpy(fc_host_##field(shost), buf, cnt);                       \
1377         i->f->set_host_##field(shost);                                  \
1378         return count;                                                   \
1379 }
1380
1381 #define fc_host_rd_attr(field, format_string, sz)                       \
1382         fc_host_show_function(field, format_string, sz, )               \
1383 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1384                          show_fc_host_##field, NULL)
1385
1386 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1387         fc_host_show_function(field, format_string, sz, (cast))         \
1388 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1389                           show_fc_host_##field, NULL)
1390
1391 #define fc_host_rw_attr(field, format_string, sz)                       \
1392         fc_host_show_function(field, format_string, sz, )               \
1393         fc_host_store_function(field)                                   \
1394 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1395                         show_fc_host_##field,                           \
1396                         store_fc_host_##field)
1397
1398 #define fc_host_rd_enum_attr(title, maxlen)                             \
1399 static ssize_t                                                          \
1400 show_fc_host_##title (struct device *dev,                               \
1401                       struct device_attribute *attr, char *buf)         \
1402 {                                                                       \
1403         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1404         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1405         const char *name;                                               \
1406         if (i->f->get_host_##title)                                     \
1407                 i->f->get_host_##title(shost);                          \
1408         name = get_fc_##title##_name(fc_host_##title(shost));           \
1409         if (!name)                                                      \
1410                 return -EINVAL;                                         \
1411         return snprintf(buf, maxlen, "%s\n", name);                     \
1412 }                                                                       \
1413 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1414
1415 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1416         i->private_host_attrs[count] = device_attr_host_##field;        \
1417         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1418         i->private_host_attrs[count].store = NULL;                      \
1419         i->host_attrs[count] = &i->private_host_attrs[count];           \
1420         if (i->f->show_host_##field)                                    \
1421                 count++
1422
1423 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1424         i->private_host_attrs[count] = device_attr_host_##field;        \
1425         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1426         i->private_host_attrs[count].store = NULL;                      \
1427         i->host_attrs[count] = &i->private_host_attrs[count];           \
1428         count++
1429
1430 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1431         i->private_host_attrs[count] = device_attr_host_##field;        \
1432         if (!i->f->set_host_##field) {                                  \
1433                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1434                 i->private_host_attrs[count].store = NULL;              \
1435         }                                                               \
1436         i->host_attrs[count] = &i->private_host_attrs[count];           \
1437         if (i->f->show_host_##field)                                    \
1438                 count++
1439
1440
1441 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1442 static ssize_t                                                          \
1443 show_fc_host_##field (struct device *dev,                               \
1444                       struct device_attribute *attr, char *buf)         \
1445 {                                                                       \
1446         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1447         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1448 }
1449
1450 #define fc_private_host_rd_attr(field, format_string, sz)               \
1451         fc_private_host_show_function(field, format_string, sz, )       \
1452 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1453                          show_fc_host_##field, NULL)
1454
1455 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1456         fc_private_host_show_function(field, format_string, sz, (cast)) \
1457 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1458                           show_fc_host_##field, NULL)
1459
1460 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1461         i->private_host_attrs[count] = device_attr_host_##field;        \
1462         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1463         i->private_host_attrs[count].store = NULL;                      \
1464         i->host_attrs[count] = &i->private_host_attrs[count];           \
1465         count++
1466
1467 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1468 {                                                                       \
1469         i->private_host_attrs[count] = device_attr_host_##field;        \
1470         i->host_attrs[count] = &i->private_host_attrs[count];           \
1471         count++;                                                        \
1472 }
1473
1474
1475 /* Fixed Host Attributes */
1476
1477 static ssize_t
1478 show_fc_host_supported_classes (struct device *dev,
1479                                 struct device_attribute *attr, char *buf)
1480 {
1481         struct Scsi_Host *shost = transport_class_to_shost(dev);
1482
1483         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1484                 return snprintf(buf, 20, "unspecified\n");
1485
1486         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1487 }
1488 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1489                 show_fc_host_supported_classes, NULL);
1490
1491 static ssize_t
1492 show_fc_host_supported_fc4s (struct device *dev,
1493                              struct device_attribute *attr, char *buf)
1494 {
1495         struct Scsi_Host *shost = transport_class_to_shost(dev);
1496         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1497 }
1498 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1499                 show_fc_host_supported_fc4s, NULL);
1500
1501 static ssize_t
1502 show_fc_host_supported_speeds (struct device *dev,
1503                                struct device_attribute *attr, char *buf)
1504 {
1505         struct Scsi_Host *shost = transport_class_to_shost(dev);
1506
1507         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1508                 return snprintf(buf, 20, "unknown\n");
1509
1510         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1511 }
1512 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1513                 show_fc_host_supported_speeds, NULL);
1514
1515
1516 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1517 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1518 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1519                              unsigned long long);
1520 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1521 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1522 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1523 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1524 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1525 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1526 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1527 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1528 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1529 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1530
1531
1532 /* Dynamic Host Attributes */
1533
1534 static ssize_t
1535 show_fc_host_active_fc4s (struct device *dev,
1536                           struct device_attribute *attr, char *buf)
1537 {
1538         struct Scsi_Host *shost = transport_class_to_shost(dev);
1539         struct fc_internal *i = to_fc_internal(shost->transportt);
1540
1541         if (i->f->get_host_active_fc4s)
1542                 i->f->get_host_active_fc4s(shost);
1543
1544         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1545 }
1546 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1547                 show_fc_host_active_fc4s, NULL);
1548
1549 static ssize_t
1550 show_fc_host_speed (struct device *dev,
1551                     struct device_attribute *attr, char *buf)
1552 {
1553         struct Scsi_Host *shost = transport_class_to_shost(dev);
1554         struct fc_internal *i = to_fc_internal(shost->transportt);
1555
1556         if (i->f->get_host_speed)
1557                 i->f->get_host_speed(shost);
1558
1559         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1560                 return snprintf(buf, 20, "unknown\n");
1561
1562         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1563 }
1564 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1565                 show_fc_host_speed, NULL);
1566
1567
1568 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1569 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1570 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1571 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1572 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1573
1574 fc_private_host_show_function(system_hostname, "%s\n",
1575                 FC_SYMBOLIC_NAME_SIZE + 1, )
1576 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1577 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1578                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1579
1580
1581 /* Private Host Attributes */
1582
1583 static ssize_t
1584 show_fc_private_host_tgtid_bind_type(struct device *dev,
1585                                      struct device_attribute *attr, char *buf)
1586 {
1587         struct Scsi_Host *shost = transport_class_to_shost(dev);
1588         const char *name;
1589
1590         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1591         if (!name)
1592                 return -EINVAL;
1593         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1594 }
1595
1596 #define get_list_head_entry(pos, head, member)          \
1597         pos = list_entry((head)->next, typeof(*pos), member)
1598
1599 static ssize_t
1600 store_fc_private_host_tgtid_bind_type(struct device *dev,
1601         struct device_attribute *attr, const char *buf, size_t count)
1602 {
1603         struct Scsi_Host *shost = transport_class_to_shost(dev);
1604         struct fc_rport *rport;
1605         enum fc_tgtid_binding_type val;
1606         unsigned long flags;
1607
1608         if (get_fc_tgtid_bind_type_match(buf, &val))
1609                 return -EINVAL;
1610
1611         /* if changing bind type, purge all unused consistent bindings */
1612         if (val != fc_host_tgtid_bind_type(shost)) {
1613                 spin_lock_irqsave(shost->host_lock, flags);
1614                 while (!list_empty(&fc_host_rport_bindings(shost))) {
1615                         get_list_head_entry(rport,
1616                                 &fc_host_rport_bindings(shost), peers);
1617                         list_del(&rport->peers);
1618                         rport->port_state = FC_PORTSTATE_DELETED;
1619                         fc_queue_work(shost, &rport->rport_delete_work);
1620                 }
1621                 spin_unlock_irqrestore(shost->host_lock, flags);
1622         }
1623
1624         fc_host_tgtid_bind_type(shost) = val;
1625         return count;
1626 }
1627
1628 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1629                         show_fc_private_host_tgtid_bind_type,
1630                         store_fc_private_host_tgtid_bind_type);
1631
1632 static ssize_t
1633 store_fc_private_host_issue_lip(struct device *dev,
1634         struct device_attribute *attr, const char *buf, size_t count)
1635 {
1636         struct Scsi_Host *shost = transport_class_to_shost(dev);
1637         struct fc_internal *i = to_fc_internal(shost->transportt);
1638         int ret;
1639
1640         /* ignore any data value written to the attribute */
1641         if (i->f->issue_fc_host_lip) {
1642                 ret = i->f->issue_fc_host_lip(shost);
1643                 return ret ? ret: count;
1644         }
1645
1646         return -ENOENT;
1647 }
1648
1649 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1650                         store_fc_private_host_issue_lip);
1651
1652 static ssize_t
1653 store_fc_private_host_dev_loss_tmo(struct device *dev,
1654                                    struct device_attribute *attr,
1655                                    const char *buf, size_t count)
1656 {
1657         struct Scsi_Host *shost = transport_class_to_shost(dev);
1658         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1659         struct fc_rport *rport;
1660         unsigned long val, flags;
1661         int rc;
1662
1663         rc = fc_str_to_dev_loss(buf, &val);
1664         if (rc)
1665                 return rc;
1666
1667         fc_host_dev_loss_tmo(shost) = val;
1668         spin_lock_irqsave(shost->host_lock, flags);
1669         list_for_each_entry(rport, &fc_host->rports, peers)
1670                 fc_rport_set_dev_loss_tmo(rport, val);
1671         spin_unlock_irqrestore(shost->host_lock, flags);
1672         return count;
1673 }
1674
1675 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1676 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1677                       show_fc_host_dev_loss_tmo,
1678                       store_fc_private_host_dev_loss_tmo);
1679
1680 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1681
1682 /*
1683  * Host Statistics Management
1684  */
1685
1686 /* Show a given attribute in the statistics group */
1687 static ssize_t
1688 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1689 {
1690         struct Scsi_Host *shost = transport_class_to_shost(dev);
1691         struct fc_internal *i = to_fc_internal(shost->transportt);
1692         struct fc_host_statistics *stats;
1693         ssize_t ret = -ENOENT;
1694
1695         if (offset > sizeof(struct fc_host_statistics) ||
1696             offset % sizeof(u64) != 0)
1697                 WARN_ON(1);
1698
1699         if (i->f->get_fc_host_stats) {
1700                 stats = (i->f->get_fc_host_stats)(shost);
1701                 if (stats)
1702                         ret = snprintf(buf, 20, "0x%llx\n",
1703                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1704         }
1705         return ret;
1706 }
1707
1708
1709 /* generate a read-only statistics attribute */
1710 #define fc_host_statistic(name)                                         \
1711 static ssize_t show_fcstat_##name(struct device *cd,                    \
1712                                   struct device_attribute *attr,        \
1713                                   char *buf)                            \
1714 {                                                                       \
1715         return fc_stat_show(cd, buf,                                    \
1716                             offsetof(struct fc_host_statistics, name)); \
1717 }                                                                       \
1718 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1719
1720 fc_host_statistic(seconds_since_last_reset);
1721 fc_host_statistic(tx_frames);
1722 fc_host_statistic(tx_words);
1723 fc_host_statistic(rx_frames);
1724 fc_host_statistic(rx_words);
1725 fc_host_statistic(lip_count);
1726 fc_host_statistic(nos_count);
1727 fc_host_statistic(error_frames);
1728 fc_host_statistic(dumped_frames);
1729 fc_host_statistic(link_failure_count);
1730 fc_host_statistic(loss_of_sync_count);
1731 fc_host_statistic(loss_of_signal_count);
1732 fc_host_statistic(prim_seq_protocol_err_count);
1733 fc_host_statistic(invalid_tx_word_count);
1734 fc_host_statistic(invalid_crc_count);
1735 fc_host_statistic(fcp_input_requests);
1736 fc_host_statistic(fcp_output_requests);
1737 fc_host_statistic(fcp_control_requests);
1738 fc_host_statistic(fcp_input_megabytes);
1739 fc_host_statistic(fcp_output_megabytes);
1740 fc_host_statistic(fcp_packet_alloc_failures);
1741 fc_host_statistic(fcp_packet_aborts);
1742 fc_host_statistic(fcp_frame_alloc_failures);
1743 fc_host_statistic(fc_no_free_exch);
1744 fc_host_statistic(fc_no_free_exch_xid);
1745 fc_host_statistic(fc_xid_not_found);
1746 fc_host_statistic(fc_xid_busy);
1747 fc_host_statistic(fc_seq_not_found);
1748 fc_host_statistic(fc_non_bls_resp);
1749
1750 static ssize_t
1751 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1752                     const char *buf, size_t count)
1753 {
1754         struct Scsi_Host *shost = transport_class_to_shost(dev);
1755         struct fc_internal *i = to_fc_internal(shost->transportt);
1756
1757         /* ignore any data value written to the attribute */
1758         if (i->f->reset_fc_host_stats) {
1759                 i->f->reset_fc_host_stats(shost);
1760                 return count;
1761         }
1762
1763         return -ENOENT;
1764 }
1765 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1766                                 fc_reset_statistics);
1767
1768 static struct attribute *fc_statistics_attrs[] = {
1769         &device_attr_host_seconds_since_last_reset.attr,
1770         &device_attr_host_tx_frames.attr,
1771         &device_attr_host_tx_words.attr,
1772         &device_attr_host_rx_frames.attr,
1773         &device_attr_host_rx_words.attr,
1774         &device_attr_host_lip_count.attr,
1775         &device_attr_host_nos_count.attr,
1776         &device_attr_host_error_frames.attr,
1777         &device_attr_host_dumped_frames.attr,
1778         &device_attr_host_link_failure_count.attr,
1779         &device_attr_host_loss_of_sync_count.attr,
1780         &device_attr_host_loss_of_signal_count.attr,
1781         &device_attr_host_prim_seq_protocol_err_count.attr,
1782         &device_attr_host_invalid_tx_word_count.attr,
1783         &device_attr_host_invalid_crc_count.attr,
1784         &device_attr_host_fcp_input_requests.attr,
1785         &device_attr_host_fcp_output_requests.attr,
1786         &device_attr_host_fcp_control_requests.attr,
1787         &device_attr_host_fcp_input_megabytes.attr,
1788         &device_attr_host_fcp_output_megabytes.attr,
1789         &device_attr_host_fcp_packet_alloc_failures.attr,
1790         &device_attr_host_fcp_packet_aborts.attr,
1791         &device_attr_host_fcp_frame_alloc_failures.attr,
1792         &device_attr_host_fc_no_free_exch.attr,
1793         &device_attr_host_fc_no_free_exch_xid.attr,
1794         &device_attr_host_fc_xid_not_found.attr,
1795         &device_attr_host_fc_xid_busy.attr,
1796         &device_attr_host_fc_seq_not_found.attr,
1797         &device_attr_host_fc_non_bls_resp.attr,
1798         &device_attr_host_reset_statistics.attr,
1799         NULL
1800 };
1801
1802 static struct attribute_group fc_statistics_group = {
1803         .name = "statistics",
1804         .attrs = fc_statistics_attrs,
1805 };
1806
1807
1808 /* Host Vport Attributes */
1809
1810 static int
1811 fc_parse_wwn(const char *ns, u64 *nm)
1812 {
1813         unsigned int i, j;
1814         u8 wwn[8];
1815
1816         memset(wwn, 0, sizeof(wwn));
1817
1818         /* Validate and store the new name */
1819         for (i=0, j=0; i < 16; i++) {
1820                 int value;
1821
1822                 value = hex_to_bin(*ns++);
1823                 if (value >= 0)
1824                         j = (j << 4) | value;
1825                 else
1826                         return -EINVAL;
1827                 if (i % 2) {
1828                         wwn[i/2] = j & 0xff;
1829                         j = 0;
1830                 }
1831         }
1832
1833         *nm = wwn_to_u64(wwn);
1834
1835         return 0;
1836 }
1837
1838
1839 /*
1840  * "Short-cut" sysfs variable to create a new vport on a FC Host.
1841  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1842  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1843  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1844  */
1845 static ssize_t
1846 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1847                            const char *buf, size_t count)
1848 {
1849         struct Scsi_Host *shost = transport_class_to_shost(dev);
1850         struct fc_vport_identifiers vid;
1851         struct fc_vport *vport;
1852         unsigned int cnt=count;
1853         int stat;
1854
1855         memset(&vid, 0, sizeof(vid));
1856
1857         /* count may include a LF at end of string */
1858         if (buf[cnt-1] == '\n')
1859                 cnt--;
1860
1861         /* validate we have enough characters for WWPN */
1862         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1863                 return -EINVAL;
1864
1865         stat = fc_parse_wwn(&buf[0], &vid.port_name);
1866         if (stat)
1867                 return stat;
1868
1869         stat = fc_parse_wwn(&buf[17], &vid.node_name);
1870         if (stat)
1871                 return stat;
1872
1873         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1874         vid.vport_type = FC_PORTTYPE_NPIV;
1875         /* vid.symbolic_name is already zero/NULL's */
1876         vid.disable = false;            /* always enabled */
1877
1878         /* we only allow support on Channel 0 !!! */
1879         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1880         return stat ? stat : count;
1881 }
1882 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1883                         store_fc_host_vport_create);
1884
1885
1886 /*
1887  * "Short-cut" sysfs variable to delete a vport on a FC Host.
1888  * Vport is identified by a string containing "<WWPN>:<WWNN>".
1889  * The WWNs are specified as hex characters, and may *not* contain
1890  * any prefixes (e.g. 0x, x, etc)
1891  */
1892 static ssize_t
1893 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1894                            const char *buf, size_t count)
1895 {
1896         struct Scsi_Host *shost = transport_class_to_shost(dev);
1897         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1898         struct fc_vport *vport;
1899         u64 wwpn, wwnn;
1900         unsigned long flags;
1901         unsigned int cnt=count;
1902         int stat, match;
1903
1904         /* count may include a LF at end of string */
1905         if (buf[cnt-1] == '\n')
1906                 cnt--;
1907
1908         /* validate we have enough characters for WWPN */
1909         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1910                 return -EINVAL;
1911
1912         stat = fc_parse_wwn(&buf[0], &wwpn);
1913         if (stat)
1914                 return stat;
1915
1916         stat = fc_parse_wwn(&buf[17], &wwnn);
1917         if (stat)
1918                 return stat;
1919
1920         spin_lock_irqsave(shost->host_lock, flags);
1921         match = 0;
1922         /* we only allow support on Channel 0 !!! */
1923         list_for_each_entry(vport, &fc_host->vports, peers) {
1924                 if ((vport->channel == 0) &&
1925                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1926                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1927                                 break;
1928                         vport->flags |= FC_VPORT_DELETING;
1929                         match = 1;
1930                         break;
1931                 }
1932         }
1933         spin_unlock_irqrestore(shost->host_lock, flags);
1934
1935         if (!match)
1936                 return -ENODEV;
1937
1938         stat = fc_vport_terminate(vport);
1939         return stat ? stat : count;
1940 }
1941 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1942                         store_fc_host_vport_delete);
1943
1944
1945 static int fc_host_match(struct attribute_container *cont,
1946                           struct device *dev)
1947 {
1948         struct Scsi_Host *shost;
1949         struct fc_internal *i;
1950
1951         if (!scsi_is_host_device(dev))
1952                 return 0;
1953
1954         shost = dev_to_shost(dev);
1955         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1956             != &fc_host_class.class)
1957                 return 0;
1958
1959         i = to_fc_internal(shost->transportt);
1960
1961         return &i->t.host_attrs.ac == cont;
1962 }
1963
1964 static int fc_target_match(struct attribute_container *cont,
1965                             struct device *dev)
1966 {
1967         struct Scsi_Host *shost;
1968         struct fc_internal *i;
1969
1970         if (!scsi_is_target_device(dev))
1971                 return 0;
1972
1973         shost = dev_to_shost(dev->parent);
1974         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1975             != &fc_host_class.class)
1976                 return 0;
1977
1978         i = to_fc_internal(shost->transportt);
1979
1980         return &i->t.target_attrs.ac == cont;
1981 }
1982
1983 static void fc_rport_dev_release(struct device *dev)
1984 {
1985         struct fc_rport *rport = dev_to_rport(dev);
1986         put_device(dev->parent);
1987         kfree(rport);
1988 }
1989
1990 int scsi_is_fc_rport(const struct device *dev)
1991 {
1992         return dev->release == fc_rport_dev_release;
1993 }
1994 EXPORT_SYMBOL(scsi_is_fc_rport);
1995
1996 static int fc_rport_match(struct attribute_container *cont,
1997                             struct device *dev)
1998 {
1999         struct Scsi_Host *shost;
2000         struct fc_internal *i;
2001
2002         if (!scsi_is_fc_rport(dev))
2003                 return 0;
2004
2005         shost = dev_to_shost(dev->parent);
2006         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2007             != &fc_host_class.class)
2008                 return 0;
2009
2010         i = to_fc_internal(shost->transportt);
2011
2012         return &i->rport_attr_cont.ac == cont;
2013 }
2014
2015
2016 static void fc_vport_dev_release(struct device *dev)
2017 {
2018         struct fc_vport *vport = dev_to_vport(dev);
2019         put_device(dev->parent);                /* release kobj parent */
2020         kfree(vport);
2021 }
2022
2023 static int scsi_is_fc_vport(const struct device *dev)
2024 {
2025         return dev->release == fc_vport_dev_release;
2026 }
2027
2028 static int fc_vport_match(struct attribute_container *cont,
2029                             struct device *dev)
2030 {
2031         struct fc_vport *vport;
2032         struct Scsi_Host *shost;
2033         struct fc_internal *i;
2034
2035         if (!scsi_is_fc_vport(dev))
2036                 return 0;
2037         vport = dev_to_vport(dev);
2038
2039         shost = vport_to_shost(vport);
2040         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2041             != &fc_host_class.class)
2042                 return 0;
2043
2044         i = to_fc_internal(shost->transportt);
2045         return &i->vport_attr_cont.ac == cont;
2046 }
2047
2048
2049 /**
2050  * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2051  * @scmd:       The SCSI command which timed out
2052  *
2053  * This routine protects against error handlers getting invoked while a
2054  * rport is in a blocked state, typically due to a temporarily loss of
2055  * connectivity. If the error handlers are allowed to proceed, requests
2056  * to abort i/o, reset the target, etc will likely fail as there is no way
2057  * to communicate with the device to perform the requested function. These
2058  * failures may result in the midlayer taking the device offline, requiring
2059  * manual intervention to restore operation.
2060  *
2061  * This routine, called whenever an i/o times out, validates the state of
2062  * the underlying rport. If the rport is blocked, it returns
2063  * EH_RESET_TIMER, which will continue to reschedule the timeout.
2064  * Eventually, either the device will return, or devloss_tmo will fire,
2065  * and when the timeout then fires, it will be handled normally.
2066  * If the rport is not blocked, normal error handling continues.
2067  *
2068  * Notes:
2069  *      This routine assumes no locks are held on entry.
2070  */
2071 enum blk_eh_timer_return
2072 fc_eh_timed_out(struct scsi_cmnd *scmd)
2073 {
2074         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2075
2076         if (rport->port_state == FC_PORTSTATE_BLOCKED)
2077                 return BLK_EH_RESET_TIMER;
2078
2079         return BLK_EH_DONE;
2080 }
2081 EXPORT_SYMBOL(fc_eh_timed_out);
2082
2083 /*
2084  * Called by fc_user_scan to locate an rport on the shost that
2085  * matches the channel and target id, and invoke scsi_scan_target()
2086  * on the rport.
2087  */
2088 static void
2089 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2090 {
2091         struct fc_rport *rport;
2092         unsigned long flags;
2093
2094         spin_lock_irqsave(shost->host_lock, flags);
2095
2096         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2097                 if (rport->scsi_target_id == -1)
2098                         continue;
2099
2100                 if (rport->port_state != FC_PORTSTATE_ONLINE)
2101                         continue;
2102
2103                 if ((channel == rport->channel) &&
2104                     (id == rport->scsi_target_id)) {
2105                         spin_unlock_irqrestore(shost->host_lock, flags);
2106                         scsi_scan_target(&rport->dev, channel, id, lun,
2107                                          SCSI_SCAN_MANUAL);
2108                         return;
2109                 }
2110         }
2111
2112         spin_unlock_irqrestore(shost->host_lock, flags);
2113 }
2114
2115 /*
2116  * Called via sysfs scan routines. Necessary, as the FC transport
2117  * wants to place all target objects below the rport object. So this
2118  * routine must invoke the scsi_scan_target() routine with the rport
2119  * object as the parent.
2120  */
2121 static int
2122 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2123 {
2124         uint chlo, chhi;
2125         uint tgtlo, tgthi;
2126
2127         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2128             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2129             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2130                 return -EINVAL;
2131
2132         if (channel == SCAN_WILD_CARD) {
2133                 chlo = 0;
2134                 chhi = shost->max_channel + 1;
2135         } else {
2136                 chlo = channel;
2137                 chhi = channel + 1;
2138         }
2139
2140         if (id == SCAN_WILD_CARD) {
2141                 tgtlo = 0;
2142                 tgthi = shost->max_id;
2143         } else {
2144                 tgtlo = id;
2145                 tgthi = id + 1;
2146         }
2147
2148         for ( ; chlo < chhi; chlo++)
2149                 for ( ; tgtlo < tgthi; tgtlo++)
2150                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2151
2152         return 0;
2153 }
2154
2155 struct scsi_transport_template *
2156 fc_attach_transport(struct fc_function_template *ft)
2157 {
2158         int count;
2159         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2160                                         GFP_KERNEL);
2161
2162         if (unlikely(!i))
2163                 return NULL;
2164
2165         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2166         i->t.target_attrs.ac.class = &fc_transport_class.class;
2167         i->t.target_attrs.ac.match = fc_target_match;
2168         i->t.target_size = sizeof(struct fc_starget_attrs);
2169         transport_container_register(&i->t.target_attrs);
2170
2171         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2172         i->t.host_attrs.ac.class = &fc_host_class.class;
2173         i->t.host_attrs.ac.match = fc_host_match;
2174         i->t.host_size = sizeof(struct fc_host_attrs);
2175         if (ft->get_fc_host_stats)
2176                 i->t.host_attrs.statistics = &fc_statistics_group;
2177         transport_container_register(&i->t.host_attrs);
2178
2179         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2180         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2181         i->rport_attr_cont.ac.match = fc_rport_match;
2182         transport_container_register(&i->rport_attr_cont);
2183
2184         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2185         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2186         i->vport_attr_cont.ac.match = fc_vport_match;
2187         transport_container_register(&i->vport_attr_cont);
2188
2189         i->f = ft;
2190
2191         /* Transport uses the shost workq for scsi scanning */
2192         i->t.create_work_queue = 1;
2193
2194         i->t.user_scan = fc_user_scan;
2195
2196         /*
2197          * Setup SCSI Target Attributes.
2198          */
2199         count = 0;
2200         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2201         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2202         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2203
2204         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2205
2206         i->starget_attrs[count] = NULL;
2207
2208
2209         /*
2210          * Setup SCSI Host Attributes.
2211          */
2212         count=0;
2213         SETUP_HOST_ATTRIBUTE_RD(node_name);
2214         SETUP_HOST_ATTRIBUTE_RD(port_name);
2215         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2216         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2217         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2218         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2219         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2220         if (ft->vport_create) {
2221                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2222                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2223         }
2224         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2225         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2226         SETUP_HOST_ATTRIBUTE_RD(model);
2227         SETUP_HOST_ATTRIBUTE_RD(model_description);
2228         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2229         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2230         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2231         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2232
2233         SETUP_HOST_ATTRIBUTE_RD(port_id);
2234         SETUP_HOST_ATTRIBUTE_RD(port_type);
2235         SETUP_HOST_ATTRIBUTE_RD(port_state);
2236         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2237         SETUP_HOST_ATTRIBUTE_RD(speed);
2238         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2239         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2240         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2241
2242         /* Transport-managed attributes */
2243         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2244         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2245         if (ft->issue_fc_host_lip)
2246                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2247         if (ft->vport_create)
2248                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2249         if (ft->vport_delete)
2250                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2251
2252         BUG_ON(count > FC_HOST_NUM_ATTRS);
2253
2254         i->host_attrs[count] = NULL;
2255
2256         /*
2257          * Setup Remote Port Attributes.
2258          */
2259         count=0;
2260         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2261         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2262         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2263         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2264         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2265         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2266         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2267         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2268         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2269         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2270
2271         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2272
2273         i->rport_attrs[count] = NULL;
2274
2275         /*
2276          * Setup Virtual Port Attributes.
2277          */
2278         count=0;
2279         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2280         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2281         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2282         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2283         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2284         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2285         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2286         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2287         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2288
2289         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2290
2291         i->vport_attrs[count] = NULL;
2292
2293         return &i->t;
2294 }
2295 EXPORT_SYMBOL(fc_attach_transport);
2296
2297 void fc_release_transport(struct scsi_transport_template *t)
2298 {
2299         struct fc_internal *i = to_fc_internal(t);
2300
2301         transport_container_unregister(&i->t.target_attrs);
2302         transport_container_unregister(&i->t.host_attrs);
2303         transport_container_unregister(&i->rport_attr_cont);
2304         transport_container_unregister(&i->vport_attr_cont);
2305
2306         kfree(i);
2307 }
2308 EXPORT_SYMBOL(fc_release_transport);
2309
2310 /**
2311  * fc_queue_work - Queue work to the fc_host workqueue.
2312  * @shost:      Pointer to Scsi_Host bound to fc_host.
2313  * @work:       Work to queue for execution.
2314  *
2315  * Return value:
2316  *      1 - work queued for execution
2317  *      0 - work is already queued
2318  *      -EINVAL - work queue doesn't exist
2319  */
2320 static int
2321 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2322 {
2323         if (unlikely(!fc_host_work_q(shost))) {
2324                 printk(KERN_ERR
2325                         "ERROR: FC host '%s' attempted to queue work, "
2326                         "when no workqueue created.\n", shost->hostt->name);
2327                 dump_stack();
2328
2329                 return -EINVAL;
2330         }
2331
2332         return queue_work(fc_host_work_q(shost), work);
2333 }
2334
2335 /**
2336  * fc_flush_work - Flush a fc_host's workqueue.
2337  * @shost:      Pointer to Scsi_Host bound to fc_host.
2338  */
2339 static void
2340 fc_flush_work(struct Scsi_Host *shost)
2341 {
2342         if (!fc_host_work_q(shost)) {
2343                 printk(KERN_ERR
2344                         "ERROR: FC host '%s' attempted to flush work, "
2345                         "when no workqueue created.\n", shost->hostt->name);
2346                 dump_stack();
2347                 return;
2348         }
2349
2350         flush_workqueue(fc_host_work_q(shost));
2351 }
2352
2353 /**
2354  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2355  * @shost:      Pointer to Scsi_Host bound to fc_host.
2356  * @work:       Work to queue for execution.
2357  * @delay:      jiffies to delay the work queuing
2358  *
2359  * Return value:
2360  *      1 on success / 0 already queued / < 0 for error
2361  */
2362 static int
2363 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2364                                 unsigned long delay)
2365 {
2366         if (unlikely(!fc_host_devloss_work_q(shost))) {
2367                 printk(KERN_ERR
2368                         "ERROR: FC host '%s' attempted to queue work, "
2369                         "when no workqueue created.\n", shost->hostt->name);
2370                 dump_stack();
2371
2372                 return -EINVAL;
2373         }
2374
2375         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2376 }
2377
2378 /**
2379  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2380  * @shost:      Pointer to Scsi_Host bound to fc_host.
2381  */
2382 static void
2383 fc_flush_devloss(struct Scsi_Host *shost)
2384 {
2385         if (!fc_host_devloss_work_q(shost)) {
2386                 printk(KERN_ERR
2387                         "ERROR: FC host '%s' attempted to flush work, "
2388                         "when no workqueue created.\n", shost->hostt->name);
2389                 dump_stack();
2390                 return;
2391         }
2392
2393         flush_workqueue(fc_host_devloss_work_q(shost));
2394 }
2395
2396
2397 /**
2398  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2399  * @shost:      Which &Scsi_Host
2400  *
2401  * This routine is expected to be called immediately preceding the
2402  * a driver's call to scsi_remove_host().
2403  *
2404  * WARNING: A driver utilizing the fc_transport, which fails to call
2405  *   this routine prior to scsi_remove_host(), will leave dangling
2406  *   objects in /sys/class/fc_remote_ports. Access to any of these
2407  *   objects can result in a system crash !!!
2408  *
2409  * Notes:
2410  *      This routine assumes no locks are held on entry.
2411  */
2412 void
2413 fc_remove_host(struct Scsi_Host *shost)
2414 {
2415         struct fc_vport *vport = NULL, *next_vport = NULL;
2416         struct fc_rport *rport = NULL, *next_rport = NULL;
2417         struct workqueue_struct *work_q;
2418         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2419         unsigned long flags;
2420
2421         spin_lock_irqsave(shost->host_lock, flags);
2422
2423         /* Remove any vports */
2424         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2425                 vport->flags |= FC_VPORT_DELETING;
2426                 fc_queue_work(shost, &vport->vport_delete_work);
2427         }
2428
2429         /* Remove any remote ports */
2430         list_for_each_entry_safe(rport, next_rport,
2431                         &fc_host->rports, peers) {
2432                 list_del(&rport->peers);
2433                 rport->port_state = FC_PORTSTATE_DELETED;
2434                 fc_queue_work(shost, &rport->rport_delete_work);
2435         }
2436
2437         list_for_each_entry_safe(rport, next_rport,
2438                         &fc_host->rport_bindings, peers) {
2439                 list_del(&rport->peers);
2440                 rport->port_state = FC_PORTSTATE_DELETED;
2441                 fc_queue_work(shost, &rport->rport_delete_work);
2442         }
2443
2444         spin_unlock_irqrestore(shost->host_lock, flags);
2445
2446         /* flush all scan work items */
2447         scsi_flush_work(shost);
2448
2449         /* flush all stgt delete, and rport delete work items, then kill it  */
2450         if (fc_host->work_q) {
2451                 work_q = fc_host->work_q;
2452                 fc_host->work_q = NULL;
2453                 destroy_workqueue(work_q);
2454         }
2455
2456         /* flush all devloss work items, then kill it  */
2457         if (fc_host->devloss_work_q) {
2458                 work_q = fc_host->devloss_work_q;
2459                 fc_host->devloss_work_q = NULL;
2460                 destroy_workqueue(work_q);
2461         }
2462 }
2463 EXPORT_SYMBOL(fc_remove_host);
2464
2465 static void fc_terminate_rport_io(struct fc_rport *rport)
2466 {
2467         struct Scsi_Host *shost = rport_to_shost(rport);
2468         struct fc_internal *i = to_fc_internal(shost->transportt);
2469
2470         /* Involve the LLDD if possible to terminate all io on the rport. */
2471         if (i->f->terminate_rport_io)
2472                 i->f->terminate_rport_io(rport);
2473
2474         /*
2475          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2476          */
2477         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2478 }
2479
2480 /**
2481  * fc_starget_delete - called to delete the scsi descendants of an rport
2482  * @work:       remote port to be operated on.
2483  *
2484  * Deletes target and all sdevs.
2485  */
2486 static void
2487 fc_starget_delete(struct work_struct *work)
2488 {
2489         struct fc_rport *rport =
2490                 container_of(work, struct fc_rport, stgt_delete_work);
2491
2492         fc_terminate_rport_io(rport);
2493         scsi_remove_target(&rport->dev);
2494 }
2495
2496
2497 /**
2498  * fc_rport_final_delete - finish rport termination and delete it.
2499  * @work:       remote port to be deleted.
2500  */
2501 static void
2502 fc_rport_final_delete(struct work_struct *work)
2503 {
2504         struct fc_rport *rport =
2505                 container_of(work, struct fc_rport, rport_delete_work);
2506         struct device *dev = &rport->dev;
2507         struct Scsi_Host *shost = rport_to_shost(rport);
2508         struct fc_internal *i = to_fc_internal(shost->transportt);
2509         unsigned long flags;
2510         int do_callback = 0;
2511
2512         fc_terminate_rport_io(rport);
2513
2514         /*
2515          * if a scan is pending, flush the SCSI Host work_q so that
2516          * that we can reclaim the rport scan work element.
2517          */
2518         if (rport->flags & FC_RPORT_SCAN_PENDING)
2519                 scsi_flush_work(shost);
2520
2521         /*
2522          * Cancel any outstanding timers. These should really exist
2523          * only when rmmod'ing the LLDD and we're asking for
2524          * immediate termination of the rports
2525          */
2526         spin_lock_irqsave(shost->host_lock, flags);
2527         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2528                 spin_unlock_irqrestore(shost->host_lock, flags);
2529                 if (!cancel_delayed_work(&rport->fail_io_work))
2530                         fc_flush_devloss(shost);
2531                 if (!cancel_delayed_work(&rport->dev_loss_work))
2532                         fc_flush_devloss(shost);
2533                 cancel_work_sync(&rport->scan_work);
2534                 spin_lock_irqsave(shost->host_lock, flags);
2535                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2536         }
2537         spin_unlock_irqrestore(shost->host_lock, flags);
2538
2539         /* Delete SCSI target and sdevs */
2540         if (rport->scsi_target_id != -1)
2541                 fc_starget_delete(&rport->stgt_delete_work);
2542
2543         /*
2544          * Notify the driver that the rport is now dead. The LLDD will
2545          * also guarantee that any communication to the rport is terminated
2546          *
2547          * Avoid this call if we already called it when we preserved the
2548          * rport for the binding.
2549          */
2550         spin_lock_irqsave(shost->host_lock, flags);
2551         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2552             (i->f->dev_loss_tmo_callbk)) {
2553                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2554                 do_callback = 1;
2555         }
2556         spin_unlock_irqrestore(shost->host_lock, flags);
2557
2558         if (do_callback)
2559                 i->f->dev_loss_tmo_callbk(rport);
2560
2561         fc_bsg_remove(rport->rqst_q);
2562
2563         transport_remove_device(dev);
2564         device_del(dev);
2565         transport_destroy_device(dev);
2566         scsi_host_put(shost);                   /* for fc_host->rport list */
2567         put_device(dev);                        /* for self-reference */
2568 }
2569
2570
2571 /**
2572  * fc_remote_port_create - allocates and creates a remote FC port.
2573  * @shost:      scsi host the remote port is connected to.
2574  * @channel:    Channel on shost port connected to.
2575  * @ids:        The world wide names, fc address, and FC4 port
2576  *              roles for the remote port.
2577  *
2578  * Allocates and creates the remoter port structure, including the
2579  * class and sysfs creation.
2580  *
2581  * Notes:
2582  *      This routine assumes no locks are held on entry.
2583  */
2584 static struct fc_rport *
2585 fc_remote_port_create(struct Scsi_Host *shost, int channel,
2586                       struct fc_rport_identifiers  *ids)
2587 {
2588         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2589         struct fc_internal *fci = to_fc_internal(shost->transportt);
2590         struct fc_rport *rport;
2591         struct device *dev;
2592         unsigned long flags;
2593         int error;
2594         size_t size;
2595
2596         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2597         rport = kzalloc(size, GFP_KERNEL);
2598         if (unlikely(!rport)) {
2599                 printk(KERN_ERR "%s: allocation failure\n", __func__);
2600                 return NULL;
2601         }
2602
2603         rport->maxframe_size = -1;
2604         rport->supported_classes = FC_COS_UNSPECIFIED;
2605         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2606         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2607         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2608         rport->port_id = ids->port_id;
2609         rport->roles = ids->roles;
2610         rport->port_state = FC_PORTSTATE_ONLINE;
2611         if (fci->f->dd_fcrport_size)
2612                 rport->dd_data = &rport[1];
2613         rport->channel = channel;
2614         rport->fast_io_fail_tmo = -1;
2615
2616         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2617         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2618         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2619         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2620         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2621
2622         spin_lock_irqsave(shost->host_lock, flags);
2623
2624         rport->number = fc_host->next_rport_number++;
2625         if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
2626             (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
2627                 rport->scsi_target_id = fc_host->next_target_id++;
2628         else
2629                 rport->scsi_target_id = -1;
2630         list_add_tail(&rport->peers, &fc_host->rports);
2631         scsi_host_get(shost);                   /* for fc_host->rport list */
2632
2633         spin_unlock_irqrestore(shost->host_lock, flags);
2634
2635         dev = &rport->dev;
2636         device_initialize(dev);                 /* takes self reference */
2637         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2638         dev->release = fc_rport_dev_release;
2639         dev_set_name(dev, "rport-%d:%d-%d",
2640                      shost->host_no, channel, rport->number);
2641         transport_setup_device(dev);
2642
2643         error = device_add(dev);
2644         if (error) {
2645                 printk(KERN_ERR "FC Remote Port device_add failed\n");
2646                 goto delete_rport;
2647         }
2648         transport_add_device(dev);
2649         transport_configure_device(dev);
2650
2651         fc_bsg_rportadd(shost, rport);
2652         /* ignore any bsg add error - we just can't do sgio */
2653
2654         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2655                 /* initiate a scan of the target */
2656                 rport->flags |= FC_RPORT_SCAN_PENDING;
2657                 scsi_queue_work(shost, &rport->scan_work);
2658         }
2659
2660         return rport;
2661
2662 delete_rport:
2663         transport_destroy_device(dev);
2664         spin_lock_irqsave(shost->host_lock, flags);
2665         list_del(&rport->peers);
2666         scsi_host_put(shost);                   /* for fc_host->rport list */
2667         spin_unlock_irqrestore(shost->host_lock, flags);
2668         put_device(dev->parent);
2669         kfree(rport);
2670         return NULL;
2671 }
2672
2673 /**
2674  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2675  * @shost:      scsi host the remote port is connected to.
2676  * @channel:    Channel on shost port connected to.
2677  * @ids:        The world wide names, fc address, and FC4 port
2678  *              roles for the remote port.
2679  *
2680  * The LLDD calls this routine to notify the transport of the existence
2681  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2682  * of the port, it's FC address (port_id), and the FC4 roles that are
2683  * active for the port.
2684  *
2685  * For ports that are FCP targets (aka scsi targets), the FC transport
2686  * maintains consistent target id bindings on behalf of the LLDD.
2687  * A consistent target id binding is an assignment of a target id to
2688  * a remote port identifier, which persists while the scsi host is
2689  * attached. The remote port can disappear, then later reappear, and
2690  * it's target id assignment remains the same. This allows for shifts
2691  * in FC addressing (if binding by wwpn or wwnn) with no apparent
2692  * changes to the scsi subsystem which is based on scsi host number and
2693  * target id values.  Bindings are only valid during the attachment of
2694  * the scsi host. If the host detaches, then later re-attaches, target
2695  * id bindings may change.
2696  *
2697  * This routine is responsible for returning a remote port structure.
2698  * The routine will search the list of remote ports it maintains
2699  * internally on behalf of consistent target id mappings. If found, the
2700  * remote port structure will be reused. Otherwise, a new remote port
2701  * structure will be allocated.
2702  *
2703  * Whenever a remote port is allocated, a new fc_remote_port class
2704  * device is created.
2705  *
2706  * Should not be called from interrupt context.
2707  *
2708  * Notes:
2709  *      This routine assumes no locks are held on entry.
2710  */
2711 struct fc_rport *
2712 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2713         struct fc_rport_identifiers  *ids)
2714 {
2715         struct fc_internal *fci = to_fc_internal(shost->transportt);
2716         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2717         struct fc_rport *rport;
2718         unsigned long flags;
2719         int match = 0;
2720
2721         /* ensure any stgt delete functions are done */
2722         fc_flush_work(shost);
2723
2724         /*
2725          * Search the list of "active" rports, for an rport that has been
2726          * deleted, but we've held off the real delete while the target
2727          * is in a "blocked" state.
2728          */
2729         spin_lock_irqsave(shost->host_lock, flags);
2730
2731         list_for_each_entry(rport, &fc_host->rports, peers) {
2732
2733                 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
2734                      rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
2735                         (rport->channel == channel)) {
2736
2737                         switch (fc_host->tgtid_bind_type) {
2738                         case FC_TGTID_BIND_BY_WWPN:
2739                         case FC_TGTID_BIND_NONE:
2740                                 if (rport->port_name == ids->port_name)
2741                                         match = 1;
2742                                 break;
2743                         case FC_TGTID_BIND_BY_WWNN:
2744                                 if (rport->node_name == ids->node_name)
2745                                         match = 1;
2746                                 break;
2747                         case FC_TGTID_BIND_BY_ID:
2748                                 if (rport->port_id == ids->port_id)
2749                                         match = 1;
2750                                 break;
2751                         }
2752
2753                         if (match) {
2754
2755                                 memcpy(&rport->node_name, &ids->node_name,
2756                                         sizeof(rport->node_name));
2757                                 memcpy(&rport->port_name, &ids->port_name,
2758                                         sizeof(rport->port_name));
2759                                 rport->port_id = ids->port_id;
2760
2761                                 rport->port_state = FC_PORTSTATE_ONLINE;
2762                                 rport->roles = ids->roles;
2763
2764                                 spin_unlock_irqrestore(shost->host_lock, flags);
2765
2766                                 if (fci->f->dd_fcrport_size)
2767                                         memset(rport->dd_data, 0,
2768                                                 fci->f->dd_fcrport_size);
2769
2770                                 /*
2771                                  * If we were not a target, cancel the
2772                                  * io terminate and rport timers, and
2773                                  * we're done.
2774                                  *
2775                                  * If we were a target, but our new role
2776                                  * doesn't indicate a target, leave the
2777                                  * timers running expecting the role to
2778                                  * change as the target fully logs in. If
2779                                  * it doesn't, the target will be torn down.
2780                                  *
2781                                  * If we were a target, and our role shows
2782                                  * we're still a target, cancel the timers
2783                                  * and kick off a scan.
2784                                  */
2785
2786                                 /* was a target, not in roles */
2787                                 if ((rport->scsi_target_id != -1) &&
2788                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2789                                         return rport;
2790
2791                                 /*
2792                                  * Stop the fail io and dev_loss timers.
2793                                  * If they flush, the port_state will
2794                                  * be checked and will NOOP the function.
2795                                  */
2796                                 if (!cancel_delayed_work(&rport->fail_io_work))
2797                                         fc_flush_devloss(shost);
2798                                 if (!cancel_delayed_work(&rport->dev_loss_work))
2799                                         fc_flush_devloss(shost);
2800
2801                                 spin_lock_irqsave(shost->host_lock, flags);
2802
2803                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2804                                                   FC_RPORT_DEVLOSS_PENDING |
2805                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
2806
2807                                 spin_unlock_irqrestore(shost->host_lock, flags);
2808
2809                                 /* if target, initiate a scan */
2810                                 if (rport->scsi_target_id != -1) {
2811                                         scsi_target_unblock(&rport->dev,
2812                                                             SDEV_RUNNING);
2813                                         spin_lock_irqsave(shost->host_lock,
2814                                                           flags);
2815                                         rport->flags |= FC_RPORT_SCAN_PENDING;
2816                                         scsi_queue_work(shost,
2817                                                         &rport->scan_work);
2818                                         spin_unlock_irqrestore(shost->host_lock,
2819                                                         flags);
2820                                 }
2821
2822                                 fc_bsg_goose_queue(rport);
2823
2824                                 return rport;
2825                         }
2826                 }
2827         }
2828
2829         /*
2830          * Search the bindings array
2831          * Note: if never a FCP target, you won't be on this list
2832          */
2833         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2834
2835                 /* search for a matching consistent binding */
2836
2837                 list_for_each_entry(rport, &fc_host->rport_bindings,
2838                                         peers) {
2839                         if (rport->channel != channel)
2840                                 continue;
2841
2842                         switch (fc_host->tgtid_bind_type) {
2843                         case FC_TGTID_BIND_BY_WWPN:
2844                                 if (rport->port_name == ids->port_name)
2845                                         match = 1;
2846                                 break;
2847                         case FC_TGTID_BIND_BY_WWNN:
2848                                 if (rport->node_name == ids->node_name)
2849                                         match = 1;
2850                                 break;
2851                         case FC_TGTID_BIND_BY_ID:
2852                                 if (rport->port_id == ids->port_id)
2853                                         match = 1;
2854                                 break;
2855                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2856                                 break;
2857                         }
2858
2859                         if (match) {
2860                                 list_move_tail(&rport->peers, &fc_host->rports);
2861                                 break;
2862                         }
2863                 }
2864
2865                 if (match) {
2866                         memcpy(&rport->node_name, &ids->node_name,
2867                                 sizeof(rport->node_name));
2868                         memcpy(&rport->port_name, &ids->port_name,
2869                                 sizeof(rport->port_name));
2870                         rport->port_id = ids->port_id;
2871                         rport->port_state = FC_PORTSTATE_ONLINE;
2872                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2873
2874                         if (fci->f->dd_fcrport_size)
2875                                 memset(rport->dd_data, 0,
2876                                                 fci->f->dd_fcrport_size);
2877                         spin_unlock_irqrestore(shost->host_lock, flags);
2878
2879                         fc_remote_port_rolechg(rport, ids->roles);
2880                         return rport;
2881                 }
2882         }
2883
2884         spin_unlock_irqrestore(shost->host_lock, flags);
2885
2886         /* No consistent binding found - create new remote port entry */
2887         rport = fc_remote_port_create(shost, channel, ids);
2888
2889         return rport;
2890 }
2891 EXPORT_SYMBOL(fc_remote_port_add);
2892
2893
2894 /**
2895  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2896  * @rport:      The remote port that no longer exists
2897  *
2898  * The LLDD calls this routine to notify the transport that a remote
2899  * port is no longer part of the topology. Note: Although a port
2900  * may no longer be part of the topology, it may persist in the remote
2901  * ports displayed by the fc_host. We do this under 2 conditions:
2902  *
2903  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2904  *    This allows the port to temporarily disappear, then reappear without
2905  *    disrupting the SCSI device tree attached to it. During the "blocked"
2906  *    period the port will still exist.
2907  *
2908  * 2) If the port was a scsi target and disappears for longer than we
2909  *    expect, we'll delete the port and the tear down the SCSI device tree
2910  *    attached to it. However, we want to semi-persist the target id assigned
2911  *    to that port if it eventually does exist. The port structure will
2912  *    remain (although with minimal information) so that the target id
2913  *    bindings also remain.
2914  *
2915  * If the remote port is not an FCP Target, it will be fully torn down
2916  * and deallocated, including the fc_remote_port class device.
2917  *
2918  * If the remote port is an FCP Target, the port will be placed in a
2919  * temporary blocked state. From the LLDD's perspective, the rport no
2920  * longer exists. From the SCSI midlayer's perspective, the SCSI target
2921  * exists, but all sdevs on it are blocked from further I/O. The following
2922  * is then expected.
2923  *
2924  *   If the remote port does not return (signaled by a LLDD call to
2925  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2926  *   scsi target is removed - killing all outstanding i/o and removing the
2927  *   scsi devices attached to it. The port structure will be marked Not
2928  *   Present and be partially cleared, leaving only enough information to
2929  *   recognize the remote port relative to the scsi target id binding if
2930  *   it later appears.  The port will remain as long as there is a valid
2931  *   binding (e.g. until the user changes the binding type or unloads the
2932  *   scsi host with the binding).
2933  *
2934  *   If the remote port returns within the dev_loss_tmo value (and matches
2935  *   according to the target id binding type), the port structure will be
2936  *   reused. If it is no longer a SCSI target, the target will be torn
2937  *   down. If it continues to be a SCSI target, then the target will be
2938  *   unblocked (allowing i/o to be resumed), and a scan will be activated
2939  *   to ensure that all luns are detected.
2940  *
2941  * Called from normal process context only - cannot be called from interrupt.
2942  *
2943  * Notes:
2944  *      This routine assumes no locks are held on entry.
2945  */
2946 void
2947 fc_remote_port_delete(struct fc_rport  *rport)
2948 {
2949         struct Scsi_Host *shost = rport_to_shost(rport);
2950         unsigned long timeout = rport->dev_loss_tmo;
2951         unsigned long flags;
2952
2953         /*
2954          * No need to flush the fc_host work_q's, as all adds are synchronous.
2955          *
2956          * We do need to reclaim the rport scan work element, so eventually
2957          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2958          * there's still a scan pending.
2959          */
2960
2961         spin_lock_irqsave(shost->host_lock, flags);
2962
2963         if (rport->port_state != FC_PORTSTATE_ONLINE) {
2964                 spin_unlock_irqrestore(shost->host_lock, flags);
2965                 return;
2966         }
2967
2968         /*
2969          * In the past, we if this was not an FCP-Target, we would
2970          * unconditionally just jump to deleting the rport.
2971          * However, rports can be used as node containers by the LLDD,
2972          * and its not appropriate to just terminate the rport at the
2973          * first sign of a loss in connectivity. The LLDD may want to
2974          * send ELS traffic to re-validate the login. If the rport is
2975          * immediately deleted, it makes it inappropriate for a node
2976          * container.
2977          * So... we now unconditionally wait dev_loss_tmo before
2978          * destroying an rport.
2979          */
2980
2981         rport->port_state = FC_PORTSTATE_BLOCKED;
2982
2983         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2984
2985         spin_unlock_irqrestore(shost->host_lock, flags);
2986
2987         scsi_target_block(&rport->dev);
2988
2989         /* see if we need to kill io faster than waiting for device loss */
2990         if ((rport->fast_io_fail_tmo != -1) &&
2991             (rport->fast_io_fail_tmo < timeout))
2992                 fc_queue_devloss_work(shost, &rport->fail_io_work,
2993                                         rport->fast_io_fail_tmo * HZ);
2994
2995         /* cap the length the devices can be blocked until they are deleted */
2996         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
2997 }
2998 EXPORT_SYMBOL(fc_remote_port_delete);
2999
3000 /**
3001  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3002  * @rport:      The remote port that changed.
3003  * @roles:      New roles for this port.
3004  *
3005  * Description: The LLDD calls this routine to notify the transport that the
3006  * roles on a remote port may have changed. The largest effect of this is
3007  * if a port now becomes a FCP Target, it must be allocated a
3008  * scsi target id.  If the port is no longer a FCP target, any
3009  * scsi target id value assigned to it will persist in case the
3010  * role changes back to include FCP Target. No changes in the scsi
3011  * midlayer will be invoked if the role changes (in the expectation
3012  * that the role will be resumed. If it doesn't normal error processing
3013  * will take place).
3014  *
3015  * Should not be called from interrupt context.
3016  *
3017  * Notes:
3018  *      This routine assumes no locks are held on entry.
3019  */
3020 void
3021 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3022 {
3023         struct Scsi_Host *shost = rport_to_shost(rport);
3024         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3025         unsigned long flags;
3026         int create = 0;
3027
3028         spin_lock_irqsave(shost->host_lock, flags);
3029         if (roles & FC_PORT_ROLE_FCP_TARGET) {
3030                 if (rport->scsi_target_id == -1) {
3031                         rport->scsi_target_id = fc_host->next_target_id++;
3032                         create = 1;
3033                 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3034                         create = 1;
3035         }
3036
3037         rport->roles = roles;
3038
3039         spin_unlock_irqrestore(shost->host_lock, flags);
3040
3041         if (create) {
3042                 /*
3043                  * There may have been a delete timer running on the
3044                  * port. Ensure that it is cancelled as we now know
3045                  * the port is an FCP Target.
3046                  * Note: we know the rport exists and is in an online
3047                  *  state as the LLDD would not have had an rport
3048                  *  reference to pass us.
3049                  *
3050                  * Take no action on the del_timer failure as the state
3051                  * machine state change will validate the
3052                  * transaction.
3053                  */
3054                 if (!cancel_delayed_work(&rport->fail_io_work))
3055                         fc_flush_devloss(shost);
3056                 if (!cancel_delayed_work(&rport->dev_loss_work))
3057                         fc_flush_devloss(shost);
3058
3059                 spin_lock_irqsave(shost->host_lock, flags);
3060                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3061                                   FC_RPORT_DEVLOSS_PENDING |
3062                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3063                 spin_unlock_irqrestore(shost->host_lock, flags);
3064
3065                 /* ensure any stgt delete functions are done */
3066                 fc_flush_work(shost);
3067
3068                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3069                 /* initiate a scan of the target */
3070                 spin_lock_irqsave(shost->host_lock, flags);
3071                 rport->flags |= FC_RPORT_SCAN_PENDING;
3072                 scsi_queue_work(shost, &rport->scan_work);
3073                 spin_unlock_irqrestore(shost->host_lock, flags);
3074         }
3075 }
3076 EXPORT_SYMBOL(fc_remote_port_rolechg);
3077
3078 /**
3079  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3080  * @work:       rport target that failed to reappear in the allotted time.
3081  *
3082  * Description: An attempt to delete a remote port blocks, and if it fails
3083  *              to return in the allotted time this gets called.
3084  */
3085 static void
3086 fc_timeout_deleted_rport(struct work_struct *work)
3087 {
3088         struct fc_rport *rport =
3089                 container_of(work, struct fc_rport, dev_loss_work.work);
3090         struct Scsi_Host *shost = rport_to_shost(rport);
3091         struct fc_internal *i = to_fc_internal(shost->transportt);
3092         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3093         unsigned long flags;
3094         int do_callback = 0;
3095
3096         spin_lock_irqsave(shost->host_lock, flags);
3097
3098         rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3099
3100         /*
3101          * If the port is ONLINE, then it came back. If it was a SCSI
3102          * target, validate it still is. If not, tear down the
3103          * scsi_target on it.
3104          */
3105         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3106             (rport->scsi_target_id != -1) &&
3107             !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3108                 dev_printk(KERN_ERR, &rport->dev,
3109                         "blocked FC remote port time out: no longer"
3110                         " a FCP target, removing starget\n");
3111                 spin_unlock_irqrestore(shost->host_lock, flags);
3112                 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3113                 fc_queue_work(shost, &rport->stgt_delete_work);
3114                 return;
3115         }
3116
3117         /* NOOP state - we're flushing workq's */
3118         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3119                 spin_unlock_irqrestore(shost->host_lock, flags);
3120                 dev_printk(KERN_ERR, &rport->dev,
3121                         "blocked FC remote port time out: leaving"
3122                         " rport%s alone\n",
3123                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3124                 return;
3125         }
3126
3127         if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3128             (rport->scsi_target_id == -1)) {
3129                 list_del(&rport->peers);
3130                 rport->port_state = FC_PORTSTATE_DELETED;
3131                 dev_printk(KERN_ERR, &rport->dev,
3132                         "blocked FC remote port time out: removing"
3133                         " rport%s\n",
3134                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3135                 fc_queue_work(shost, &rport->rport_delete_work);
3136                 spin_unlock_irqrestore(shost->host_lock, flags);
3137                 return;
3138         }
3139
3140         dev_printk(KERN_ERR, &rport->dev,
3141                 "blocked FC remote port time out: removing target and "
3142                 "saving binding\n");
3143
3144         list_move_tail(&rport->peers, &fc_host->rport_bindings);
3145
3146         /*
3147          * Note: We do not remove or clear the hostdata area. This allows
3148          *   host-specific target data to persist along with the
3149          *   scsi_target_id. It's up to the host to manage it's hostdata area.
3150          */
3151
3152         /*
3153          * Reinitialize port attributes that may change if the port comes back.
3154          */
3155         rport->maxframe_size = -1;
3156         rport->supported_classes = FC_COS_UNSPECIFIED;
3157         rport->roles = FC_PORT_ROLE_UNKNOWN;
3158         rport->port_state = FC_PORTSTATE_NOTPRESENT;
3159         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3160
3161         /*
3162          * Pre-emptively kill I/O rather than waiting for the work queue
3163          * item to teardown the starget. (FCOE libFC folks prefer this
3164          * and to have the rport_port_id still set when it's done).
3165          */
3166         spin_unlock_irqrestore(shost->host_lock, flags);
3167         fc_terminate_rport_io(rport);
3168
3169         spin_lock_irqsave(shost->host_lock, flags);
3170
3171         if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {     /* still missing */
3172
3173                 /* remove the identifiers that aren't used in the consisting binding */
3174                 switch (fc_host->tgtid_bind_type) {
3175                 case FC_TGTID_BIND_BY_WWPN:
3176                         rport->node_name = -1;
3177                         rport->port_id = -1;
3178                         break;
3179                 case FC_TGTID_BIND_BY_WWNN:
3180                         rport->port_name = -1;
3181                         rport->port_id = -1;
3182                         break;
3183                 case FC_TGTID_BIND_BY_ID:
3184                         rport->node_name = -1;
3185                         rport->port_name = -1;
3186                         break;
3187                 case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
3188                         break;
3189                 }
3190
3191                 /*
3192                  * As this only occurs if the remote port (scsi target)
3193                  * went away and didn't come back - we'll remove
3194                  * all attached scsi devices.
3195                  */
3196                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3197                 fc_queue_work(shost, &rport->stgt_delete_work);
3198
3199                 do_callback = 1;
3200         }
3201
3202         spin_unlock_irqrestore(shost->host_lock, flags);
3203
3204         /*
3205          * Notify the driver that the rport is now dead. The LLDD will
3206          * also guarantee that any communication to the rport is terminated
3207          *
3208          * Note: we set the CALLBK_DONE flag above to correspond
3209          */
3210         if (do_callback && i->f->dev_loss_tmo_callbk)
3211                 i->f->dev_loss_tmo_callbk(rport);
3212 }
3213
3214
3215 /**
3216  * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3217  * @work:       rport to terminate io on.
3218  *
3219  * Notes: Only requests the failure of the io, not that all are flushed
3220  *    prior to returning.
3221  */
3222 static void
3223 fc_timeout_fail_rport_io(struct work_struct *work)
3224 {
3225         struct fc_rport *rport =
3226                 container_of(work, struct fc_rport, fail_io_work.work);
3227
3228         if (rport->port_state != FC_PORTSTATE_BLOCKED)
3229                 return;
3230
3231         rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3232         fc_terminate_rport_io(rport);
3233 }
3234
3235 /**
3236  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3237  * @work:       remote port to be scanned.
3238  */
3239 static void
3240 fc_scsi_scan_rport(struct work_struct *work)
3241 {
3242         struct fc_rport *rport =
3243                 container_of(work, struct fc_rport, scan_work);
3244         struct Scsi_Host *shost = rport_to_shost(rport);
3245         struct fc_internal *i = to_fc_internal(shost->transportt);
3246         unsigned long flags;
3247
3248         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3249             (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3250             !(i->f->disable_target_scan)) {
3251                 scsi_scan_target(&rport->dev, rport->channel,
3252                                  rport->scsi_target_id, SCAN_WILD_CARD,
3253                                  SCSI_SCAN_RESCAN);
3254         }
3255
3256         spin_lock_irqsave(shost->host_lock, flags);
3257         rport->flags &= ~FC_RPORT_SCAN_PENDING;
3258         spin_unlock_irqrestore(shost->host_lock, flags);
3259 }
3260
3261 /**
3262  * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3263  * @rport: Remote port that scsi_eh is trying to recover.
3264  *
3265  * This routine can be called from a FC LLD scsi_eh callback. It
3266  * blocks the scsi_eh thread until the fc_rport leaves the
3267  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3268  * necessary to avoid the scsi_eh failing recovery actions for blocked
3269  * rports which would lead to offlined SCSI devices.
3270  *
3271  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3272  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3273  *          passed back to scsi_eh.
3274  */
3275 int fc_block_rport(struct fc_rport *rport)
3276 {
3277         struct Scsi_Host *shost = rport_to_shost(rport);
3278         unsigned long flags;
3279
3280         spin_lock_irqsave(shost->host_lock, flags);
3281         while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3282                !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3283                 spin_unlock_irqrestore(shost->host_lock, flags);
3284                 msleep(1000);
3285                 spin_lock_irqsave(shost->host_lock, flags);
3286         }
3287         spin_unlock_irqrestore(shost->host_lock, flags);
3288
3289         if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3290                 return FAST_IO_FAIL;
3291
3292         return 0;
3293 }
3294 EXPORT_SYMBOL(fc_block_rport);
3295
3296 /**
3297  * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3298  * @cmnd: SCSI command that scsi_eh is trying to recover
3299  *
3300  * This routine can be called from a FC LLD scsi_eh callback. It
3301  * blocks the scsi_eh thread until the fc_rport leaves the
3302  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3303  * necessary to avoid the scsi_eh failing recovery actions for blocked
3304  * rports which would lead to offlined SCSI devices.
3305  *
3306  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3307  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3308  *          passed back to scsi_eh.
3309  */
3310 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3311 {
3312         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3313
3314         if (WARN_ON_ONCE(!rport))
3315                 return FAST_IO_FAIL;
3316
3317         return fc_block_rport(rport);
3318 }
3319 EXPORT_SYMBOL(fc_block_scsi_eh);
3320
3321 /**
3322  * fc_vport_setup - allocates and creates a FC virtual port.
3323  * @shost:      scsi host the virtual port is connected to.
3324  * @channel:    Channel on shost port connected to.
3325  * @pdev:       parent device for vport
3326  * @ids:        The world wide names, FC4 port roles, etc for
3327  *              the virtual port.
3328  * @ret_vport:  The pointer to the created vport.
3329  *
3330  * Allocates and creates the vport structure, calls the parent host
3331  * to instantiate the vport, this completes w/ class and sysfs creation.
3332  *
3333  * Notes:
3334  *      This routine assumes no locks are held on entry.
3335  */
3336 static int
3337 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3338         struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
3339 {
3340         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3341         struct fc_internal *fci = to_fc_internal(shost->transportt);
3342         struct fc_vport *vport;
3343         struct device *dev;
3344         unsigned long flags;
3345         size_t size;
3346         int error;
3347
3348         *ret_vport = NULL;
3349
3350         if ( ! fci->f->vport_create)
3351                 return -ENOENT;
3352
3353         size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3354         vport = kzalloc(size, GFP_KERNEL);
3355         if (unlikely(!vport)) {
3356                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3357                 return -ENOMEM;
3358         }
3359
3360         vport->vport_state = FC_VPORT_UNKNOWN;
3361         vport->vport_last_state = FC_VPORT_UNKNOWN;
3362         vport->node_name = ids->node_name;
3363         vport->port_name = ids->port_name;
3364         vport->roles = ids->roles;
3365         vport->vport_type = ids->vport_type;
3366         if (fci->f->dd_fcvport_size)
3367                 vport->dd_data = &vport[1];
3368         vport->shost = shost;
3369         vport->channel = channel;
3370         vport->flags = FC_VPORT_CREATING;
3371         INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3372
3373         spin_lock_irqsave(shost->host_lock, flags);
3374
3375         if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3376                 spin_unlock_irqrestore(shost->host_lock, flags);
3377                 kfree(vport);
3378                 return -ENOSPC;
3379         }
3380         fc_host->npiv_vports_inuse++;
3381         vport->number = fc_host->next_vport_number++;
3382         list_add_tail(&vport->peers, &fc_host->vports);
3383         scsi_host_get(shost);                   /* for fc_host->vport list */
3384
3385         spin_unlock_irqrestore(shost->host_lock, flags);
3386
3387         dev = &vport->dev;
3388         device_initialize(dev);                 /* takes self reference */
3389         dev->parent = get_device(pdev);         /* takes parent reference */
3390         dev->release = fc_vport_dev_release;
3391         dev_set_name(dev, "vport-%d:%d-%d",
3392                      shost->host_no, channel, vport->number);
3393         transport_setup_device(dev);
3394
3395         error = device_add(dev);
3396         if (error) {
3397                 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3398                 goto delete_vport;
3399         }
3400         transport_add_device(dev);
3401         transport_configure_device(dev);
3402
3403         error = fci->f->vport_create(vport, ids->disable);
3404         if (error) {
3405                 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3406                 goto delete_vport_all;
3407         }
3408
3409         /*
3410          * if the parent isn't the physical adapter's Scsi_Host, ensure
3411          * the Scsi_Host at least contains a symlink to the vport.
3412          */
3413         if (pdev != &shost->shost_gendev) {
3414                 error = sysfs_create_link(&shost->shost_gendev.kobj,
3415                                  &dev->kobj, dev_name(dev));
3416                 if (error)
3417                         printk(KERN_ERR
3418                                 "%s: Cannot create vport symlinks for "
3419                                 "%s, err=%d\n",
3420                                 __func__, dev_name(dev), error);
3421         }
3422         spin_lock_irqsave(shost->host_lock, flags);
3423         vport->flags &= ~FC_VPORT_CREATING;
3424         spin_unlock_irqrestore(shost->host_lock, flags);
3425
3426         dev_printk(KERN_NOTICE, pdev,
3427                         "%s created via shost%d channel %d\n", dev_name(dev),
3428                         shost->host_no, channel);
3429
3430         *ret_vport = vport;
3431
3432         return 0;
3433
3434 delete_vport_all:
3435         transport_remove_device(dev);
3436         device_del(dev);
3437 delete_vport:
3438         transport_destroy_device(dev);
3439         spin_lock_irqsave(shost->host_lock, flags);
3440         list_del(&vport->peers);
3441         scsi_host_put(shost);                   /* for fc_host->vport list */
3442         fc_host->npiv_vports_inuse--;
3443         spin_unlock_irqrestore(shost->host_lock, flags);
3444         put_device(dev->parent);
3445         kfree(vport);
3446
3447         return error;
3448 }
3449
3450 /**
3451  * fc_vport_create - Admin App or LLDD requests creation of a vport
3452  * @shost:      scsi host the virtual port is connected to.
3453  * @channel:    channel on shost port connected to.
3454  * @ids:        The world wide names, FC4 port roles, etc for
3455  *              the virtual port.
3456  *
3457  * Notes:
3458  *      This routine assumes no locks are held on entry.
3459  */
3460 struct fc_vport *
3461 fc_vport_create(struct Scsi_Host *shost, int channel,
3462         struct fc_vport_identifiers *ids)
3463 {
3464         int stat;
3465         struct fc_vport *vport;
3466
3467         stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3468                  ids, &vport);
3469         return stat ? NULL : vport;
3470 }
3471 EXPORT_SYMBOL(fc_vport_create);
3472
3473 /**
3474  * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3475  * @vport:      fc_vport to be terminated
3476  *
3477  * Calls the LLDD vport_delete() function, then deallocates and removes
3478  * the vport from the shost and object tree.
3479  *
3480  * Notes:
3481  *      This routine assumes no locks are held on entry.
3482  */
3483 int
3484 fc_vport_terminate(struct fc_vport *vport)
3485 {
3486         struct Scsi_Host *shost = vport_to_shost(vport);
3487         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3488         struct fc_internal *i = to_fc_internal(shost->transportt);
3489         struct device *dev = &vport->dev;
3490         unsigned long flags;
3491         int stat;
3492
3493         if (i->f->vport_delete)
3494                 stat = i->f->vport_delete(vport);
3495         else
3496                 stat = -ENOENT;
3497
3498         spin_lock_irqsave(shost->host_lock, flags);
3499         vport->flags &= ~FC_VPORT_DELETING;
3500         if (!stat) {
3501                 vport->flags |= FC_VPORT_DELETED;
3502                 list_del(&vport->peers);
3503                 fc_host->npiv_vports_inuse--;
3504                 scsi_host_put(shost);           /* for fc_host->vport list */
3505         }
3506         spin_unlock_irqrestore(shost->host_lock, flags);
3507
3508         if (stat)
3509                 return stat;
3510
3511         if (dev->parent != &shost->shost_gendev)
3512                 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3513         transport_remove_device(dev);
3514         device_del(dev);
3515         transport_destroy_device(dev);
3516
3517         /*
3518          * Removing our self-reference should mean our
3519          * release function gets called, which will drop the remaining
3520          * parent reference and free the data structure.
3521          */
3522         put_device(dev);                        /* for self-reference */
3523
3524         return 0; /* SUCCESS */
3525 }
3526 EXPORT_SYMBOL(fc_vport_terminate);
3527
3528 /**
3529  * fc_vport_sched_delete - workq-based delete request for a vport
3530  * @work:       vport to be deleted.
3531  */
3532 static void
3533 fc_vport_sched_delete(struct work_struct *work)
3534 {
3535         struct fc_vport *vport =
3536                 container_of(work, struct fc_vport, vport_delete_work);
3537         int stat;
3538
3539         stat = fc_vport_terminate(vport);
3540         if (stat)
3541                 dev_printk(KERN_ERR, vport->dev.parent,
3542                         "%s: %s could not be deleted created via "
3543                         "shost%d channel %d - error %d\n", __func__,
3544                         dev_name(&vport->dev), vport->shost->host_no,
3545                         vport->channel, stat);
3546 }
3547
3548
3549 /*
3550  * BSG support
3551  */
3552
3553 /**
3554  * fc_bsg_job_timeout - handler for when a bsg request timesout
3555  * @req:        request that timed out
3556  */
3557 static enum blk_eh_timer_return
3558 fc_bsg_job_timeout(struct request *req)
3559 {
3560         struct bsg_job *job = blk_mq_rq_to_pdu(req);
3561         struct Scsi_Host *shost = fc_bsg_to_shost(job);
3562         struct fc_rport *rport = fc_bsg_to_rport(job);
3563         struct fc_internal *i = to_fc_internal(shost->transportt);
3564         int err = 0, inflight = 0;
3565
3566         if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
3567                 return BLK_EH_RESET_TIMER;
3568
3569         inflight = bsg_job_get(job);
3570
3571         if (inflight && i->f->bsg_timeout) {
3572                 /* call LLDD to abort the i/o as it has timed out */
3573                 err = i->f->bsg_timeout(job);
3574                 if (err == -EAGAIN) {
3575                         bsg_job_put(job);
3576                         return BLK_EH_RESET_TIMER;
3577                 } else if (err)
3578                         printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3579                                 "abort failed with status %d\n", err);
3580         }
3581
3582         /* the blk_end_sync_io() doesn't check the error */
3583         if (inflight)
3584                 blk_mq_end_request(req, BLK_STS_IOERR);
3585         return BLK_EH_DONE;
3586 }
3587
3588 /**
3589  * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3590  * @shost:      scsi host rport attached to
3591  * @job:        bsg job to be processed
3592  */
3593 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3594 {
3595         struct fc_internal *i = to_fc_internal(shost->transportt);
3596         struct fc_bsg_request *bsg_request = job->request;
3597         struct fc_bsg_reply *bsg_reply = job->reply;
3598         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3599         int ret;
3600
3601         /* check if we really have all the request data needed */
3602         if (job->request_len < cmdlen) {
3603                 ret = -ENOMSG;
3604                 goto fail_host_msg;
3605         }
3606
3607         /* Validate the host command */
3608         switch (bsg_request->msgcode) {
3609         case FC_BSG_HST_ADD_RPORT:
3610                 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3611                 break;
3612
3613         case FC_BSG_HST_DEL_RPORT:
3614                 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3615                 break;
3616
3617         case FC_BSG_HST_ELS_NOLOGIN:
3618                 cmdlen += sizeof(struct fc_bsg_host_els);
3619                 /* there better be a xmt and rcv payloads */
3620                 if ((!job->request_payload.payload_len) ||
3621                     (!job->reply_payload.payload_len)) {
3622                         ret = -EINVAL;
3623                         goto fail_host_msg;
3624                 }
3625                 break;
3626
3627         case FC_BSG_HST_CT:
3628                 cmdlen += sizeof(struct fc_bsg_host_ct);
3629                 /* there better be xmt and rcv payloads */
3630                 if ((!job->request_payload.payload_len) ||
3631                     (!job->reply_payload.payload_len)) {
3632                         ret = -EINVAL;
3633                         goto fail_host_msg;
3634                 }
3635                 break;
3636
3637         case FC_BSG_HST_VENDOR:
3638                 cmdlen += sizeof(struct fc_bsg_host_vendor);
3639                 if ((shost->hostt->vendor_id == 0L) ||
3640                     (bsg_request->rqst_data.h_vendor.vendor_id !=
3641                         shost->hostt->vendor_id)) {
3642                         ret = -ESRCH;
3643                         goto fail_host_msg;
3644                 }
3645                 break;
3646
3647         default:
3648                 ret = -EBADR;
3649                 goto fail_host_msg;
3650         }
3651
3652         ret = i->f->bsg_request(job);
3653         if (!ret)
3654                 return 0;
3655
3656 fail_host_msg:
3657         /* return the errno failure code as the only status */
3658         BUG_ON(job->reply_len < sizeof(uint32_t));
3659         bsg_reply->reply_payload_rcv_len = 0;
3660         bsg_reply->result = ret;
3661         job->reply_len = sizeof(uint32_t);
3662         bsg_job_done(job, bsg_reply->result,
3663                        bsg_reply->reply_payload_rcv_len);
3664         return 0;
3665 }
3666
3667
3668 /*
3669  * fc_bsg_goose_queue - restart rport queue in case it was stopped
3670  * @rport:      rport to be restarted
3671  */
3672 static void
3673 fc_bsg_goose_queue(struct fc_rport *rport)
3674 {
3675         struct request_queue *q = rport->rqst_q;
3676
3677         if (q)
3678                 blk_mq_run_hw_queues(q, true);
3679 }
3680
3681 /**
3682  * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3683  * @shost:      scsi host rport attached to
3684  * @job:        bsg job to be processed
3685  */
3686 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3687 {
3688         struct fc_internal *i = to_fc_internal(shost->transportt);
3689         struct fc_bsg_request *bsg_request = job->request;
3690         struct fc_bsg_reply *bsg_reply = job->reply;
3691         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3692         int ret;
3693
3694         /* check if we really have all the request data needed */
3695         if (job->request_len < cmdlen) {
3696                 ret = -ENOMSG;
3697                 goto fail_rport_msg;
3698         }
3699
3700         /* Validate the rport command */
3701         switch (bsg_request->msgcode) {
3702         case FC_BSG_RPT_ELS:
3703                 cmdlen += sizeof(struct fc_bsg_rport_els);
3704                 goto check_bidi;
3705
3706         case FC_BSG_RPT_CT:
3707                 cmdlen += sizeof(struct fc_bsg_rport_ct);
3708 check_bidi:
3709                 /* there better be xmt and rcv payloads */
3710                 if ((!job->request_payload.payload_len) ||
3711                     (!job->reply_payload.payload_len)) {
3712                         ret = -EINVAL;
3713                         goto fail_rport_msg;
3714                 }
3715                 break;
3716         default:
3717                 ret = -EBADR;
3718                 goto fail_rport_msg;
3719         }
3720
3721         ret = i->f->bsg_request(job);
3722         if (!ret)
3723                 return 0;
3724
3725 fail_rport_msg:
3726         /* return the errno failure code as the only status */
3727         BUG_ON(job->reply_len < sizeof(uint32_t));
3728         bsg_reply->reply_payload_rcv_len = 0;
3729         bsg_reply->result = ret;
3730         job->reply_len = sizeof(uint32_t);
3731         bsg_job_done(job, bsg_reply->result,
3732                        bsg_reply->reply_payload_rcv_len);
3733         return 0;
3734 }
3735
3736 static int fc_bsg_dispatch(struct bsg_job *job)
3737 {
3738         struct Scsi_Host *shost = fc_bsg_to_shost(job);
3739
3740         if (scsi_is_fc_rport(job->dev))
3741                 return fc_bsg_rport_dispatch(shost, job);
3742         else
3743                 return fc_bsg_host_dispatch(shost, job);
3744 }
3745
3746 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
3747 {
3748         if (rport->port_state == FC_PORTSTATE_BLOCKED &&
3749             !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3750                 return BLK_STS_RESOURCE;
3751
3752         if (rport->port_state != FC_PORTSTATE_ONLINE)
3753                 return BLK_STS_IOERR;
3754
3755         return BLK_STS_OK;
3756 }
3757
3758
3759 static int fc_bsg_dispatch_prep(struct bsg_job *job)
3760 {
3761         struct fc_rport *rport = fc_bsg_to_rport(job);
3762         blk_status_t ret;
3763
3764         ret = fc_bsg_rport_prep(rport);
3765         switch (ret) {
3766         case BLK_STS_OK:
3767                 break;
3768         case BLK_STS_RESOURCE:
3769                 return -EAGAIN;
3770         default:
3771                 return -EIO;
3772         }
3773
3774         return fc_bsg_dispatch(job);
3775 }
3776
3777 /**
3778  * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3779  * @shost:      shost for fc_host
3780  * @fc_host:    fc_host adding the structures to
3781  */
3782 static int
3783 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3784 {
3785         struct device *dev = &shost->shost_gendev;
3786         struct fc_internal *i = to_fc_internal(shost->transportt);
3787         struct request_queue *q;
3788         char bsg_name[20];
3789
3790         fc_host->rqst_q = NULL;
3791
3792         if (!i->f->bsg_request)
3793                 return -ENOTSUPP;
3794
3795         snprintf(bsg_name, sizeof(bsg_name),
3796                  "fc_host%d", shost->host_no);
3797
3798         q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout,
3799                                 i->f->dd_bsg_size);
3800         if (IS_ERR(q)) {
3801                 dev_err(dev,
3802                         "fc_host%d: bsg interface failed to initialize - setup queue\n",
3803                         shost->host_no);
3804                 return PTR_ERR(q);
3805         }
3806         __scsi_init_queue(shost, q);
3807         blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3808         fc_host->rqst_q = q;
3809         return 0;
3810 }
3811
3812 /**
3813  * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3814  * @shost:      shost that rport is attached to
3815  * @rport:      rport that the bsg hooks are being attached to
3816  */
3817 static int
3818 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3819 {
3820         struct device *dev = &rport->dev;
3821         struct fc_internal *i = to_fc_internal(shost->transportt);
3822         struct request_queue *q;
3823
3824         rport->rqst_q = NULL;
3825
3826         if (!i->f->bsg_request)
3827                 return -ENOTSUPP;
3828
3829         q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep,
3830                                 fc_bsg_job_timeout, i->f->dd_bsg_size);
3831         if (IS_ERR(q)) {
3832                 dev_err(dev, "failed to setup bsg queue\n");
3833                 return PTR_ERR(q);
3834         }
3835         __scsi_init_queue(shost, q);
3836         blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
3837         rport->rqst_q = q;
3838         return 0;
3839 }
3840
3841
3842 /**
3843  * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3844  * @q:  the request_queue that is to be torn down.
3845  *
3846  * Notes:
3847  *   Before unregistering the queue empty any requests that are blocked
3848  *
3849  *
3850  */
3851 static void
3852 fc_bsg_remove(struct request_queue *q)
3853 {
3854         bsg_remove_queue(q);
3855 }
3856
3857
3858 /* Original Author:  Martin Hicks */
3859 MODULE_AUTHOR("James Smart");
3860 MODULE_DESCRIPTION("FC Transport Attributes");
3861 MODULE_LICENSE("GPL");
3862
3863 module_init(fc_transport_init);
3864 module_exit(fc_transport_exit);