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  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
   7  *    Rewrite for host, target, device, and remote port attributes,
   8  *    statistics, and service functions...
   9  *    Add vports, etc
  10  */
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/slab.h>
  14 #include <linux/delay.h>
  15 #include <linux/kernel.h>
  16 #include <linux/bsg-lib.h>
  17 #include <scsi/scsi_device.h>
  18 #include <scsi/scsi_host.h>
  19 #include <scsi/scsi_transport.h>
  20 #include <scsi/scsi_transport_fc.h>
  21 #include <scsi/scsi_cmnd.h>
  22 #include <net/netlink.h>
  23 #include <scsi/scsi_netlink_fc.h>
  24 #include <scsi/scsi_bsg_fc.h>
  25 #include <uapi/scsi/fc/fc_els.h>
  26 #include "scsi_priv.h"
  27
  28 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
  29 static void fc_vport_sched_delete(struct work_struct *work);
  30 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
  31         struct device *pdev, struct fc_vport_identifiers  *ids,
  32         struct fc_vport **vport);
  33 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
  34 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
  35 static void fc_bsg_remove(struct request_queue *);
  36 static void fc_bsg_goose_queue(struct fc_rport *);
  37 static void fc_li_stats_update(u16 event_type,
  38                                struct fc_fpin_stats *stats);
  39 static void fc_delivery_stats_update(u32 reason_code,
  40                                      struct fc_fpin_stats *stats);
  41 static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats);
  42
  43 /*
  44  * Module Parameters
  45  */
  46
  47 /*
  48  * dev_loss_tmo: the default number of seconds that the FC transport
  49  *   should insulate the loss of a remote port.
  50  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
  51  */
  52 static unsigned int fc_dev_loss_tmo = 60;               /* seconds */
  53
  54 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
  55 MODULE_PARM_DESC(dev_loss_tmo,
  56                  "Maximum number of seconds that the FC transport should"
  57                  " insulate the loss of a remote port. Once this value is"
  58                  " exceeded, the scsi target is removed. Value should be"
  59                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
  60                  " fast_io_fail_tmo is not set.");
  61
  62 /*
  63  * Redefine so that we can have same named attributes in the
  64  * sdev/starget/host objects.
  65  */
  66 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)                \
  67 struct device_attribute device_attr_##_prefix##_##_name =       \
  68         __ATTR(_name,_mode,_show,_store)
  69
  70 #define fc_enum_name_search(title, table_type, table)                   \
  71 static const char *get_fc_##title##_name(enum table_type table_key)     \
  72 {                                                                       \
  73         int i;                                                          \
  74         char *name = NULL;                                              \
  75                                                                         \
  76         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
  77                 if (table[i].value == table_key) {                      \
  78                         name = table[i].name;                           \
  79                         break;                                          \
  80                 }                                                       \
  81         }                                                               \
  82         return name;                                                    \
  83 }
  84
  85 #define fc_enum_name_match(title, table_type, table)                    \
  86 static int get_fc_##title##_match(const char *table_key,                \
  87                 enum table_type *value)                                 \
  88 {                                                                       \
  89         int i;                                                          \
  90                                                                         \
  91         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
  92                 if (strncmp(table_key, table[i].name,                   \
  93                                 table[i].matchlen) == 0) {              \
  94                         *value = table[i].value;                        \
  95                         return 0; /* success */                         \
  96                 }                                                       \
  97         }                                                               \
  98         return 1; /* failure */                                         \
  99 }
 100
 101
 102 /* Convert fc_port_type values to ascii string name */
 103 static struct {
 104         enum fc_port_type       value;
 105         char                    *name;
 106 } fc_port_type_names[] = {
 107         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
 108         { FC_PORTTYPE_OTHER,            "Other" },
 109         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
 110         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
 111         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
 112         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
 113         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection)" },
 114         { FC_PORTTYPE_NPIV,             "NPIV VPORT" },
 115 };
 116 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
 117 #define FC_PORTTYPE_MAX_NAMELEN         50
 118
 119 /* Reuse fc_port_type enum function for vport_type */
 120 #define get_fc_vport_type_name get_fc_port_type_name
 121
 122
 123 /* Convert fc_host_event_code values to ascii string name */
 124 static const struct {
 125         enum fc_host_event_code         value;
 126         char                            *name;
 127 } fc_host_event_code_names[] = {
 128         { FCH_EVT_LIP,                  "lip" },
 129         { FCH_EVT_LINKUP,               "link_up" },
 130         { FCH_EVT_LINKDOWN,             "link_down" },
 131         { FCH_EVT_LIPRESET,             "lip_reset" },
 132         { FCH_EVT_RSCN,                 "rscn" },
 133         { FCH_EVT_ADAPTER_CHANGE,       "adapter_chg" },
 134         { FCH_EVT_PORT_UNKNOWN,         "port_unknown" },
 135         { FCH_EVT_PORT_ONLINE,          "port_online" },
 136         { FCH_EVT_PORT_OFFLINE,         "port_offline" },
 137         { FCH_EVT_PORT_FABRIC,          "port_fabric" },
 138         { FCH_EVT_LINK_UNKNOWN,         "link_unknown" },
 139         { FCH_EVT_LINK_FPIN,            "link_FPIN" },
 140         { FCH_EVT_LINK_FPIN_ACK,        "link_FPIN_ACK" },
 141         { FCH_EVT_VENDOR_UNIQUE,        "vendor_unique" },
 142 };
 143 fc_enum_name_search(host_event_code, fc_host_event_code,
 144                 fc_host_event_code_names)
 145 #define FC_HOST_EVENT_CODE_MAX_NAMELEN  30
 146
 147
 148 /* Convert fc_port_state values to ascii string name */
 149 static struct {
 150         enum fc_port_state      value;
 151         char                    *name;
 152         int                     matchlen;
 153 } fc_port_state_names[] = {
 154         { FC_PORTSTATE_UNKNOWN,         "Unknown", 7},
 155         { FC_PORTSTATE_NOTPRESENT,      "Not Present", 11 },
 156         { FC_PORTSTATE_ONLINE,          "Online", 6 },
 157         { FC_PORTSTATE_OFFLINE,         "Offline", 7 },
 158         { FC_PORTSTATE_BLOCKED,         "Blocked", 7 },
 159         { FC_PORTSTATE_BYPASSED,        "Bypassed", 8 },
 160         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics", 11 },
 161         { FC_PORTSTATE_LINKDOWN,        "Linkdown", 8 },
 162         { FC_PORTSTATE_ERROR,           "Error", 5 },
 163         { FC_PORTSTATE_LOOPBACK,        "Loopback", 8 },
 164         { FC_PORTSTATE_DELETED,         "Deleted", 7 },
 165         { FC_PORTSTATE_MARGINAL,        "Marginal", 8 },
 166 };
 167 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
 168 fc_enum_name_match(port_state, fc_port_state, fc_port_state_names)
 169 #define FC_PORTSTATE_MAX_NAMELEN        20
 170
 171
 172 /* Convert fc_vport_state values to ascii string name */
 173 static struct {
 174         enum fc_vport_state     value;
 175         char                    *name;
 176 } fc_vport_state_names[] = {
 177         { FC_VPORT_UNKNOWN,             "Unknown" },
 178         { FC_VPORT_ACTIVE,              "Active" },
 179         { FC_VPORT_DISABLED,            "Disabled" },
 180         { FC_VPORT_LINKDOWN,            "Linkdown" },
 181         { FC_VPORT_INITIALIZING,        "Initializing" },
 182         { FC_VPORT_NO_FABRIC_SUPP,      "No Fabric Support" },
 183         { FC_VPORT_NO_FABRIC_RSCS,      "No Fabric Resources" },
 184         { FC_VPORT_FABRIC_LOGOUT,       "Fabric Logout" },
 185         { FC_VPORT_FABRIC_REJ_WWN,      "Fabric Rejected WWN" },
 186         { FC_VPORT_FAILED,              "VPort Failed" },
 187 };
 188 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
 189 #define FC_VPORTSTATE_MAX_NAMELEN       24
 190
 191 /* Reuse fc_vport_state enum function for vport_last_state */
 192 #define get_fc_vport_last_state_name get_fc_vport_state_name
 193
 194
 195 /* Convert fc_tgtid_binding_type values to ascii string name */
 196 static const struct {
 197         enum fc_tgtid_binding_type      value;
 198         char                            *name;
 199         int                             matchlen;
 200 } fc_tgtid_binding_type_names[] = {
 201         { FC_TGTID_BIND_NONE, "none", 4 },
 202         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
 203         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
 204         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
 205 };
 206 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
 207                 fc_tgtid_binding_type_names)
 208 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
 209                 fc_tgtid_binding_type_names)
 210 #define FC_BINDTYPE_MAX_NAMELEN 30
 211
 212
 213 #define fc_bitfield_name_search(title, table)                   \
 214 static ssize_t                                                  \
 215 get_fc_##title##_names(u32 table_key, char *buf)                \
 216 {                                                               \
 217         char *prefix = "";                                      \
 218         ssize_t len = 0;                                        \
 219         int i;                                                  \
 220                                                                 \
 221         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 222                 if (table[i].value & table_key) {               \
 223                         len += sprintf(buf + len, "%s%s",       \
 224                                 prefix, table[i].name);         \
 225                         prefix = ", ";                          \
 226                 }                                               \
 227         }                                                       \
 228         len += sprintf(buf + len, "\n");                        \
 229         return len;                                             \
 230 }
 231
 232
 233 /* Convert FC_COS bit values to ascii string name */
 234 static const struct {
 235         u32                     value;
 236         char                    *name;
 237 } fc_cos_names[] = {
 238         { FC_COS_CLASS1,        "Class 1" },
 239         { FC_COS_CLASS2,        "Class 2" },
 240         { FC_COS_CLASS3,        "Class 3" },
 241         { FC_COS_CLASS4,        "Class 4" },
 242         { FC_COS_CLASS6,        "Class 6" },
 243 };
 244 fc_bitfield_name_search(cos, fc_cos_names)
 245
 246
 247 /* Convert FC_PORTSPEED bit values to ascii string name */
 248 static const struct {
 249         u32                     value;
 250         char                    *name;
 251 } fc_port_speed_names[] = {
 252         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
 253         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
 254         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
 255         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
 256         { FC_PORTSPEED_8GBIT,           "8 Gbit" },
 257         { FC_PORTSPEED_16GBIT,          "16 Gbit" },
 258         { FC_PORTSPEED_32GBIT,          "32 Gbit" },
 259         { FC_PORTSPEED_20GBIT,          "20 Gbit" },
 260         { FC_PORTSPEED_40GBIT,          "40 Gbit" },
 261         { FC_PORTSPEED_50GBIT,          "50 Gbit" },
 262         { FC_PORTSPEED_100GBIT,         "100 Gbit" },
 263         { FC_PORTSPEED_25GBIT,          "25 Gbit" },
 264         { FC_PORTSPEED_64GBIT,          "64 Gbit" },
 265         { FC_PORTSPEED_128GBIT,         "128 Gbit" },
 266         { FC_PORTSPEED_256GBIT,         "256 Gbit" },
 267         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
 268 };
 269 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 270
 271
 272 static int
 273 show_fc_fc4s (char *buf, u8 *fc4_list)
 274 {
 275         int i, len=0;
 276
 277         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 278                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 279         len += sprintf(buf + len, "\n");
 280         return len;
 281 }
 282
 283
 284 /* Convert FC_PORT_ROLE bit values to ascii string name */
 285 static const struct {
 286         u32                     value;
 287         char                    *name;
 288 } fc_port_role_names[] = {
 289         { FC_PORT_ROLE_FCP_TARGET,              "FCP Target" },
 290         { FC_PORT_ROLE_FCP_INITIATOR,           "FCP Initiator" },
 291         { FC_PORT_ROLE_IP_PORT,                 "IP Port" },
 292         { FC_PORT_ROLE_FCP_DUMMY_INITIATOR,     "FCP Dummy Initiator" },
 293         { FC_PORT_ROLE_NVME_INITIATOR,          "NVMe Initiator" },
 294         { FC_PORT_ROLE_NVME_TARGET,             "NVMe Target" },
 295         { FC_PORT_ROLE_NVME_DISCOVERY,          "NVMe Discovery" },
 296 };
 297 fc_bitfield_name_search(port_roles, fc_port_role_names)
 298
 299 /*
 300  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 301  */
 302 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 303 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 304 #define FC_FPORT_PORTID                 0x00000e
 305 #define FC_FABCTLR_PORTID               0x00000d
 306 #define FC_DIRSRVR_PORTID               0x00000c
 307 #define FC_TIMESRVR_PORTID              0x00000b
 308 #define FC_MGMTSRVR_PORTID              0x00000a
 309
 310
 311 static void fc_timeout_deleted_rport(struct work_struct *work);
 312 static void fc_timeout_fail_rport_io(struct work_struct *work);
 313 static void fc_scsi_scan_rport(struct work_struct *work);
 314
 315 /*
 316  * Attribute counts pre object type...
 317  * Increase these values if you add attributes
 318  */
 319 #define FC_STARGET_NUM_ATTRS    3
 320 #define FC_RPORT_NUM_ATTRS      10
 321 #define FC_VPORT_NUM_ATTRS      9
 322 #define FC_HOST_NUM_ATTRS       29
 323
 324 struct fc_internal {
 325         struct scsi_transport_template t;
 326         struct fc_function_template *f;
 327
 328         /*
 329          * For attributes : each object has :
 330          *   An array of the actual attributes structures
 331          *   An array of null-terminated pointers to the attribute
 332          *     structures - used for mid-layer interaction.
 333          *
 334          * The attribute containers for the starget and host are are
 335          * part of the midlayer. As the remote port is specific to the
 336          * fc transport, we must provide the attribute container.
 337          */
 338         struct device_attribute private_starget_attrs[
 339                                                         FC_STARGET_NUM_ATTRS];
 340         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 341
 342         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 343         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 344
 345         struct transport_container rport_attr_cont;
 346         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 347         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 348
 349         struct transport_container vport_attr_cont;
 350         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
 351         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
 352 };
 353
 354 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 355
 356 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 357                            struct device *cdev)
 358 {
 359         struct scsi_target *starget = to_scsi_target(dev);
 360         struct fc_rport *rport = starget_to_rport(starget);
 361
 362         /*
 363          * if parent is remote port, use values from remote port.
 364          * Otherwise, this host uses the fc_transport, but not the
 365          * remote port interface. As such, initialize to known non-values.
 366          */
 367         if (rport) {
 368                 fc_starget_node_name(starget) = rport->node_name;
 369                 fc_starget_port_name(starget) = rport->port_name;
 370                 fc_starget_port_id(starget) = rport->port_id;
 371         } else {
 372                 fc_starget_node_name(starget) = -1;
 373                 fc_starget_port_name(starget) = -1;
 374                 fc_starget_port_id(starget) = -1;
 375         }
 376
 377         return 0;
 378 }
 379
 380 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 381                                "fc_transport",
 382                                fc_target_setup,
 383                                NULL,
 384                                NULL);
 385
 386 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 387                          struct device *cdev)
 388 {
 389         struct Scsi_Host *shost = dev_to_shost(dev);
 390         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 391
 392         /*
 393          * Set default values easily detected by the midlayer as
 394          * failure cases.  The scsi lldd is responsible for initializing
 395          * all transport attributes to valid values per host.
 396          */
 397         fc_host->node_name = -1;
 398         fc_host->port_name = -1;
 399         fc_host->permanent_port_name = -1;
 400         fc_host->supported_classes = FC_COS_UNSPECIFIED;
 401         memset(fc_host->supported_fc4s, 0,
 402                 sizeof(fc_host->supported_fc4s));
 403         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
 404         fc_host->maxframe_size = -1;
 405         fc_host->max_npiv_vports = 0;
 406         memset(fc_host->serial_number, 0,
 407                 sizeof(fc_host->serial_number));
 408         memset(fc_host->manufacturer, 0,
 409                 sizeof(fc_host->manufacturer));
 410         memset(fc_host->model, 0,
 411                 sizeof(fc_host->model));
 412         memset(fc_host->model_description, 0,
 413                 sizeof(fc_host->model_description));
 414         memset(fc_host->hardware_version, 0,
 415                 sizeof(fc_host->hardware_version));
 416         memset(fc_host->driver_version, 0,
 417                 sizeof(fc_host->driver_version));
 418         memset(fc_host->firmware_version, 0,
 419                 sizeof(fc_host->firmware_version));
 420         memset(fc_host->optionrom_version, 0,
 421                 sizeof(fc_host->optionrom_version));
 422
 423         fc_host->port_id = -1;
 424         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
 425         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
 426         memset(fc_host->active_fc4s, 0,
 427                 sizeof(fc_host->active_fc4s));
 428         fc_host->speed = FC_PORTSPEED_UNKNOWN;
 429         fc_host->fabric_name = -1;
 430         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
 431         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
 432         memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats));
 433
 434         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
 435
 436         INIT_LIST_HEAD(&fc_host->rports);
 437         INIT_LIST_HEAD(&fc_host->rport_bindings);
 438         INIT_LIST_HEAD(&fc_host->vports);
 439         fc_host->next_rport_number = 0;
 440         fc_host->next_target_id = 0;
 441         fc_host->next_vport_number = 0;
 442         fc_host->npiv_vports_inuse = 0;
 443
 444         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
 445                  "fc_wq_%d", shost->host_no);
 446         fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
 447         if (!fc_host->work_q)
 448                 return -ENOMEM;
 449
 450         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
 451         snprintf(fc_host->devloss_work_q_name,
 452                  sizeof(fc_host->devloss_work_q_name),
 453                  "fc_dl_%d", shost->host_no);
 454         fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
 455                                         fc_host->devloss_work_q_name);
 456         if (!fc_host->devloss_work_q) {
 457                 destroy_workqueue(fc_host->work_q);
 458                 fc_host->work_q = NULL;
 459                 return -ENOMEM;
 460         }
 461
 462         fc_bsg_hostadd(shost, fc_host);
 463         /* ignore any bsg add error - we just can't do sgio */
 464
 465         return 0;
 466 }
 467
 468 static int fc_host_remove(struct transport_container *tc, struct device *dev,
 469                          struct device *cdev)
 470 {
 471         struct Scsi_Host *shost = dev_to_shost(dev);
 472         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 473
 474         fc_bsg_remove(fc_host->rqst_q);
 475         return 0;
 476 }
 477
 478 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 479                                "fc_host",
 480                                fc_host_setup,
 481                                fc_host_remove,
 482                                NULL);
 483
 484 /*
 485  * Setup and Remove actions for remote ports are handled
 486  * in the service functions below.
 487  */
 488 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 489                                "fc_remote_ports",
 490                                NULL,
 491                                NULL,
 492                                NULL);
 493
 494 /*
 495  * Setup and Remove actions for virtual ports are handled
 496  * in the service functions below.
 497  */
 498 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
 499                                "fc_vports",
 500                                NULL,
 501                                NULL,
 502                                NULL);
 503
 504 /*
 505  * Netlink Infrastructure
 506  */
 507
 508 static atomic_t fc_event_seq;
 509
 510 /**
 511  * fc_get_event_number - Obtain the next sequential FC event number
 512  *
 513  * Notes:
 514  *   We could have inlined this, but it would have required fc_event_seq to
 515  *   be exposed. For now, live with the subroutine call.
 516  *   Atomic used to avoid lock/unlock...
 517  */
 518 u32
 519 fc_get_event_number(void)
 520 {
 521         return atomic_add_return(1, &fc_event_seq);
 522 }
 523 EXPORT_SYMBOL(fc_get_event_number);
 524
 525 /**
 526  * fc_host_post_fc_event - routine to do the work of posting an event
 527  *                      on an fc_host.
 528  * @shost:              host the event occurred on
 529  * @event_number:       fc event number obtained from get_fc_event_number()
 530  * @event_code:         fc_host event being posted
 531  * @data_len:           amount, in bytes, of event data
 532  * @data_buf:           pointer to event data
 533  * @vendor_id:          value for Vendor id
 534  *
 535  * Notes:
 536  *      This routine assumes no locks are held on entry.
 537  */
 538 void
 539 fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
 540                 enum fc_host_event_code event_code,
 541                 u32 data_len, char *data_buf, u64 vendor_id)
 542 {
 543         struct sk_buff *skb;
 544         struct nlmsghdr *nlh;
 545         struct fc_nl_event *event;
 546         const char *name;
 547         size_t len, padding;
 548         int err;
 549
 550         if (!data_buf || data_len < 4)
 551                 data_len = 0;
 552
 553         if (!scsi_nl_sock) {
 554                 err = -ENOENT;
 555                 goto send_fail;
 556         }
 557
 558         len = FC_NL_MSGALIGN(sizeof(*event) - sizeof(event->event_data) + data_len);
 559
 560         skb = nlmsg_new(len, GFP_KERNEL);
 561         if (!skb) {
 562                 err = -ENOBUFS;
 563                 goto send_fail;
 564         }
 565
 566         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 567         if (!nlh) {
 568                 err = -ENOBUFS;
 569                 goto send_fail_skb;
 570         }
 571         event = nlmsg_data(nlh);
 572
 573         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 574                                 FC_NL_ASYNC_EVENT, len);
 575         event->seconds = ktime_get_real_seconds();
 576         event->vendor_id = vendor_id;
 577         event->host_no = shost->host_no;
 578         event->event_datalen = data_len;        /* bytes */
 579         event->event_num = event_number;
 580         event->event_code = event_code;
 581         if (data_len)
 582                 memcpy(event->event_data_flex, data_buf, data_len);
 583         padding = len - offsetof(typeof(*event), event_data_flex) - data_len;
 584         memset(event->event_data_flex + data_len, 0, padding);
 585
 586         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 587                         GFP_KERNEL);
 588         return;
 589
 590 send_fail_skb:
 591         kfree_skb(skb);
 592 send_fail:
 593         name = get_fc_host_event_code_name(event_code);
 594         printk(KERN_WARNING
 595                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
 596                 __func__, shost->host_no,
 597                 (name) ? name : "<unknown>",
 598                 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err);
 599         return;
 600 }
 601 EXPORT_SYMBOL(fc_host_post_fc_event);
 602
 603 /**
 604  * fc_host_post_event - called to post an even on an fc_host.
 605  * @shost:              host the event occurred on
 606  * @event_number:       fc event number obtained from get_fc_event_number()
 607  * @event_code:         fc_host event being posted
 608  * @event_data:         32bits of data for the event being posted
 609  *
 610  * Notes:
 611  *      This routine assumes no locks are held on entry.
 612  */
 613 void
 614 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 615                 enum fc_host_event_code event_code, u32 event_data)
 616 {
 617         fc_host_post_fc_event(shost, event_number, event_code,
 618                 (u32)sizeof(u32), (char *)&event_data, 0);
 619 }
 620 EXPORT_SYMBOL(fc_host_post_event);
 621
 622
 623 /**
 624  * fc_host_post_vendor_event - called to post a vendor unique event
 625  *                      on an fc_host
 626  * @shost:              host the event occurred on
 627  * @event_number:       fc event number obtained from get_fc_event_number()
 628  * @data_len:           amount, in bytes, of vendor unique data
 629  * @data_buf:           pointer to vendor unique data
 630  * @vendor_id:          Vendor id
 631  *
 632  * Notes:
 633  *      This routine assumes no locks are held on entry.
 634  */
 635 void
 636 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 637                 u32 data_len, char * data_buf, u64 vendor_id)
 638 {
 639         fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE,
 640                 data_len, data_buf, vendor_id);
 641 }
 642 EXPORT_SYMBOL(fc_host_post_vendor_event);
 643
 644 /**
 645  * fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn
 646  * @shost:              host the fc_rport is associated with
 647  * @wwpn:               wwpn of the fc_rport device
 648  *
 649  * Notes:
 650  *      This routine assumes no locks are held on entry.
 651  */
 652 struct fc_rport *
 653 fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn)
 654 {
 655         struct fc_rport *rport;
 656         unsigned long flags;
 657
 658         spin_lock_irqsave(shost->host_lock, flags);
 659
 660         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
 661                 if (rport->port_state != FC_PORTSTATE_ONLINE)
 662                         continue;
 663
 664                 if (rport->port_name == wwpn) {
 665                         spin_unlock_irqrestore(shost->host_lock, flags);
 666                         return rport;
 667                 }
 668         }
 669
 670         spin_unlock_irqrestore(shost->host_lock, flags);
 671         return NULL;
 672 }
 673 EXPORT_SYMBOL(fc_find_rport_by_wwpn);
 674
 675 static void
 676 fc_li_stats_update(u16 event_type,
 677                    struct fc_fpin_stats *stats)
 678 {
 679         stats->li++;
 680         switch (event_type) {
 681         case FPIN_LI_UNKNOWN:
 682                 stats->li_failure_unknown++;
 683                 break;
 684         case FPIN_LI_LINK_FAILURE:
 685                 stats->li_link_failure_count++;
 686                 break;
 687         case FPIN_LI_LOSS_OF_SYNC:
 688                 stats->li_loss_of_sync_count++;
 689                 break;
 690         case FPIN_LI_LOSS_OF_SIG:
 691                 stats->li_loss_of_signals_count++;
 692                 break;
 693         case FPIN_LI_PRIM_SEQ_ERR:
 694                 stats->li_prim_seq_err_count++;
 695                 break;
 696         case FPIN_LI_INVALID_TX_WD:
 697                 stats->li_invalid_tx_word_count++;
 698                 break;
 699         case FPIN_LI_INVALID_CRC:
 700                 stats->li_invalid_crc_count++;
 701                 break;
 702         case FPIN_LI_DEVICE_SPEC:
 703                 stats->li_device_specific++;
 704                 break;
 705         }
 706 }
 707
 708 static void
 709 fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats)
 710 {
 711         stats->dn++;
 712         switch (reason_code) {
 713         case FPIN_DELI_UNKNOWN:
 714                 stats->dn_unknown++;
 715                 break;
 716         case FPIN_DELI_TIMEOUT:
 717                 stats->dn_timeout++;
 718                 break;
 719         case FPIN_DELI_UNABLE_TO_ROUTE:
 720                 stats->dn_unable_to_route++;
 721                 break;
 722         case FPIN_DELI_DEVICE_SPEC:
 723                 stats->dn_device_specific++;
 724                 break;
 725         }
 726 }
 727
 728 static void
 729 fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats)
 730 {
 731         stats->cn++;
 732         switch (event_type) {
 733         case FPIN_CONGN_CLEAR:
 734                 stats->cn_clear++;
 735                 break;
 736         case FPIN_CONGN_LOST_CREDIT:
 737                 stats->cn_lost_credit++;
 738                 break;
 739         case FPIN_CONGN_CREDIT_STALL:
 740                 stats->cn_credit_stall++;
 741                 break;
 742         case FPIN_CONGN_OVERSUBSCRIPTION:
 743                 stats->cn_oversubscription++;
 744                 break;
 745         case FPIN_CONGN_DEVICE_SPEC:
 746                 stats->cn_device_specific++;
 747         }
 748 }
 749
 750 /*
 751  * fc_fpin_li_stats_update - routine to update Link Integrity
 752  * event statistics.
 753  * @shost:              host the FPIN was received on
 754  * @tlv:                pointer to link integrity descriptor
 755  *
 756  */
 757 static void
 758 fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv)
 759 {
 760         u8 i;
 761         struct fc_rport *rport = NULL;
 762         struct fc_rport *attach_rport = NULL;
 763         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 764         struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv;
 765         u16 event_type = be16_to_cpu(li_desc->event_type);
 766         u64 wwpn;
 767
 768         rport = fc_find_rport_by_wwpn(shost,
 769                                       be64_to_cpu(li_desc->attached_wwpn));
 770         if (rport &&
 771             (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
 772              rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
 773                 attach_rport = rport;
 774                 fc_li_stats_update(event_type, &attach_rport->fpin_stats);
 775         }
 776
 777         if (be32_to_cpu(li_desc->pname_count) > 0) {
 778                 for (i = 0;
 779                     i < be32_to_cpu(li_desc->pname_count);
 780                     i++) {
 781                         wwpn = be64_to_cpu(li_desc->pname_list[i]);
 782                         rport = fc_find_rport_by_wwpn(shost, wwpn);
 783                         if (rport &&
 784                             (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
 785                             rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
 786                                 if (rport == attach_rport)
 787                                         continue;
 788                                 fc_li_stats_update(event_type,
 789                                                    &rport->fpin_stats);
 790                         }
 791                 }
 792         }
 793
 794         if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn))
 795                 fc_li_stats_update(event_type, &fc_host->fpin_stats);
 796 }
 797
 798 /*
 799  * fc_fpin_delivery_stats_update - routine to update Delivery Notification
 800  * event statistics.
 801  * @shost:              host the FPIN was received on
 802  * @tlv:                pointer to delivery descriptor
 803  *
 804  */
 805 static void
 806 fc_fpin_delivery_stats_update(struct Scsi_Host *shost,
 807                               struct fc_tlv_desc *tlv)
 808 {
 809         struct fc_rport *rport = NULL;
 810         struct fc_rport *attach_rport = NULL;
 811         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 812         struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv;
 813         u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code);
 814
 815         rport = fc_find_rport_by_wwpn(shost,
 816                                       be64_to_cpu(dn_desc->attached_wwpn));
 817         if (rport &&
 818             (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
 819              rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
 820                 attach_rport = rport;
 821                 fc_delivery_stats_update(reason_code,
 822                                          &attach_rport->fpin_stats);
 823         }
 824
 825         if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn))
 826                 fc_delivery_stats_update(reason_code, &fc_host->fpin_stats);
 827 }
 828
 829 /*
 830  * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion
 831  * event statistics.
 832  * @shost:              host the FPIN was received on
 833  * @tlv:                pointer to peer congestion descriptor
 834  *
 835  */
 836 static void
 837 fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost,
 838                                 struct fc_tlv_desc *tlv)
 839 {
 840         u8 i;
 841         struct fc_rport *rport = NULL;
 842         struct fc_rport *attach_rport = NULL;
 843         struct fc_fn_peer_congn_desc *pc_desc =
 844             (struct fc_fn_peer_congn_desc *)tlv;
 845         u16 event_type = be16_to_cpu(pc_desc->event_type);
 846         u64 wwpn;
 847
 848         rport = fc_find_rport_by_wwpn(shost,
 849                                       be64_to_cpu(pc_desc->attached_wwpn));
 850         if (rport &&
 851             (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
 852              rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
 853                 attach_rport = rport;
 854                 fc_cn_stats_update(event_type, &attach_rport->fpin_stats);
 855         }
 856
 857         if (be32_to_cpu(pc_desc->pname_count) > 0) {
 858                 for (i = 0;
 859                     i < be32_to_cpu(pc_desc->pname_count);
 860                     i++) {
 861                         wwpn = be64_to_cpu(pc_desc->pname_list[i]);
 862                         rport = fc_find_rport_by_wwpn(shost, wwpn);
 863                         if (rport &&
 864                             (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
 865                              rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
 866                                 if (rport == attach_rport)
 867                                         continue;
 868                                 fc_cn_stats_update(event_type,
 869                                                    &rport->fpin_stats);
 870                         }
 871                 }
 872         }
 873 }
 874
 875 /*
 876  * fc_fpin_congn_stats_update - routine to update Congestion
 877  * event statistics.
 878  * @shost:              host the FPIN was received on
 879  * @tlv:                pointer to congestion descriptor
 880  *
 881  */
 882 static void
 883 fc_fpin_congn_stats_update(struct Scsi_Host *shost,
 884                            struct fc_tlv_desc *tlv)
 885 {
 886         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 887         struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv;
 888
 889         fc_cn_stats_update(be16_to_cpu(congn->event_type),
 890                            &fc_host->fpin_stats);
 891 }
 892
 893 /**
 894  * fc_host_fpin_rcv - routine to process a received FPIN.
 895  * @shost:              host the FPIN was received on
 896  * @fpin_len:           length of FPIN payload, in bytes
 897  * @fpin_buf:           pointer to FPIN payload
 898  * @event_acknowledge:  1, if LLDD handles this event.
 899  * Notes:
 900  *      This routine assumes no locks are held on entry.
 901  */
 902 void
 903 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf,
 904                 u8 event_acknowledge)
 905 {
 906         struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf;
 907         struct fc_tlv_desc *tlv;
 908         u32 bytes_remain;
 909         u32 dtag;
 910         enum fc_host_event_code event_code =
 911                 event_acknowledge ? FCH_EVT_LINK_FPIN_ACK : FCH_EVT_LINK_FPIN;
 912
 913         /* Update Statistics */
 914         tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
 915         bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc);
 916         bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
 917
 918         while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
 919                bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
 920                 dtag = be32_to_cpu(tlv->desc_tag);
 921                 switch (dtag) {
 922                 case ELS_DTAG_LNK_INTEGRITY:
 923                         fc_fpin_li_stats_update(shost, tlv);
 924                         break;
 925                 case ELS_DTAG_DELIVERY:
 926                         fc_fpin_delivery_stats_update(shost, tlv);
 927                         break;
 928                 case ELS_DTAG_PEER_CONGEST:
 929                         fc_fpin_peer_congn_stats_update(shost, tlv);
 930                         break;
 931                 case ELS_DTAG_CONGESTION:
 932                         fc_fpin_congn_stats_update(shost, tlv);
 933                 }
 934
 935                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
 936                 tlv = fc_tlv_next_desc(tlv);
 937         }
 938
 939         fc_host_post_fc_event(shost, fc_get_event_number(),
 940                                 event_code, fpin_len, fpin_buf, 0);
 941 }
 942 EXPORT_SYMBOL(fc_host_fpin_rcv);
 943
 944
 945 static __init int fc_transport_init(void)
 946 {
 947         int error;
 948
 949         atomic_set(&fc_event_seq, 0);
 950
 951         error = transport_class_register(&fc_host_class);
 952         if (error)
 953                 return error;
 954         error = transport_class_register(&fc_vport_class);
 955         if (error)
 956                 goto unreg_host_class;
 957         error = transport_class_register(&fc_rport_class);
 958         if (error)
 959                 goto unreg_vport_class;
 960         error = transport_class_register(&fc_transport_class);
 961         if (error)
 962                 goto unreg_rport_class;
 963         return 0;
 964
 965 unreg_rport_class:
 966         transport_class_unregister(&fc_rport_class);
 967 unreg_vport_class:
 968         transport_class_unregister(&fc_vport_class);
 969 unreg_host_class:
 970         transport_class_unregister(&fc_host_class);
 971         return error;
 972 }
 973
 974 static void __exit fc_transport_exit(void)
 975 {
 976         transport_class_unregister(&fc_transport_class);
 977         transport_class_unregister(&fc_rport_class);
 978         transport_class_unregister(&fc_host_class);
 979         transport_class_unregister(&fc_vport_class);
 980 }
 981
 982 /*
 983  * FC Remote Port Attribute Management
 984  */
 985
 986 #define fc_rport_show_function(field, format_string, sz, cast)          \
 987 static ssize_t                                                          \
 988 show_fc_rport_##field (struct device *dev,                              \
 989                        struct device_attribute *attr, char *buf)        \
 990 {                                                                       \
 991         struct fc_rport *rport = transport_class_to_rport(dev);         \
 992         struct Scsi_Host *shost = rport_to_shost(rport);                \
 993         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 994         if ((i->f->get_rport_##field) &&                                \
 995             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 996               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 997               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 998                 i->f->get_rport_##field(rport);                         \
 999         return snprintf(buf, sz, format_string, cast rport->field);     \
1000 }
1001
1002 #define fc_rport_store_function(field)                                  \
1003 static ssize_t                                                          \
1004 store_fc_rport_##field(struct device *dev,                              \
1005                        struct device_attribute *attr,                   \
1006                        const char *buf, size_t count)                   \
1007 {                                                                       \
1008         int val;                                                        \
1009         struct fc_rport *rport = transport_class_to_rport(dev);         \
1010         struct Scsi_Host *shost = rport_to_shost(rport);                \
1011         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1012         char *cp;                                                       \
1013         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
1014             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
1015             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
1016                 return -EBUSY;                                          \
1017         val = simple_strtoul(buf, &cp, 0);                              \
1018         if (*cp && (*cp != '\n'))                                       \
1019                 return -EINVAL;                                         \
1020         i->f->set_rport_##field(rport, val);                            \
1021         return count;                                                   \
1022 }
1023
1024 #define fc_rport_rd_attr(field, format_string, sz)                      \
1025         fc_rport_show_function(field, format_string, sz, )              \
1026 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
1027                          show_fc_rport_##field, NULL)
1028
1029 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
1030         fc_rport_show_function(field, format_string, sz, (cast))        \
1031 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
1032                           show_fc_rport_##field, NULL)
1033
1034 #define fc_rport_rw_attr(field, format_string, sz)                      \
1035         fc_rport_show_function(field, format_string, sz, )              \
1036         fc_rport_store_function(field)                                  \
1037 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
1038                         show_fc_rport_##field,                          \
1039                         store_fc_rport_##field)
1040
1041
1042 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
1043 static ssize_t                                                          \
1044 show_fc_rport_##field (struct device *dev,                              \
1045                        struct device_attribute *attr, char *buf)        \
1046 {                                                                       \
1047         struct fc_rport *rport = transport_class_to_rport(dev);         \
1048         return snprintf(buf, sz, format_string, cast rport->field);     \
1049 }
1050
1051 #define fc_private_rport_rd_attr(field, format_string, sz)              \
1052         fc_private_rport_show_function(field, format_string, sz, )      \
1053 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
1054                          show_fc_rport_##field, NULL)
1055
1056 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
1057         fc_private_rport_show_function(field, format_string, sz, (cast)) \
1058 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
1059                           show_fc_rport_##field, NULL)
1060
1061
1062 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
1063 static ssize_t                                                          \
1064 show_fc_rport_##title (struct device *dev,                              \
1065                        struct device_attribute *attr, char *buf)        \
1066 {                                                                       \
1067         struct fc_rport *rport = transport_class_to_rport(dev);         \
1068         const char *name;                                               \
1069         name = get_fc_##title##_name(rport->title);                     \
1070         if (!name)                                                      \
1071                 return -EINVAL;                                         \
1072         return snprintf(buf, maxlen, "%s\n", name);                     \
1073 }                                                                       \
1074 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
1075                         show_fc_rport_##title, NULL)
1076
1077
1078 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
1079         i->private_rport_attrs[count] = device_attr_rport_##field; \
1080         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
1081         i->private_rport_attrs[count].store = NULL;                     \
1082         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
1083         if (i->f->show_rport_##field)                                   \
1084                 count++
1085
1086 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
1087         i->private_rport_attrs[count] = device_attr_rport_##field; \
1088         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
1089         i->private_rport_attrs[count].store = NULL;                     \
1090         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
1091         count++
1092
1093 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
1094         i->private_rport_attrs[count] = device_attr_rport_##field; \
1095         if (!i->f->set_rport_##field) {                                 \
1096                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
1097                 i->private_rport_attrs[count].store = NULL;             \
1098         }                                                               \
1099         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
1100         if (i->f->show_rport_##field)                                   \
1101                 count++
1102
1103 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
1104 {                                                                       \
1105         i->private_rport_attrs[count] = device_attr_rport_##field; \
1106         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
1107         count++;                                                        \
1108 }
1109
1110
1111 /* The FC Transport Remote Port Attributes: */
1112
1113 /* Fixed Remote Port Attributes */
1114
1115 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
1116
1117 static ssize_t
1118 show_fc_rport_supported_classes (struct device *dev,
1119                                  struct device_attribute *attr, char *buf)
1120 {
1121         struct fc_rport *rport = transport_class_to_rport(dev);
1122         if (rport->supported_classes == FC_COS_UNSPECIFIED)
1123                 return snprintf(buf, 20, "unspecified\n");
1124         return get_fc_cos_names(rport->supported_classes, buf);
1125 }
1126 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1127                 show_fc_rport_supported_classes, NULL);
1128
1129 /* Dynamic Remote Port Attributes */
1130
1131 /*
1132  * dev_loss_tmo attribute
1133  */
1134 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
1135 {
1136         char *cp;
1137
1138         *val = simple_strtoul(buf, &cp, 0);
1139         if (*cp && (*cp != '\n'))
1140                 return -EINVAL;
1141         /*
1142          * Check for overflow; dev_loss_tmo is u32
1143          */
1144         if (*val > UINT_MAX)
1145                 return -EINVAL;
1146
1147         return 0;
1148 }
1149
1150 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
1151                                      unsigned long val)
1152 {
1153         struct Scsi_Host *shost = rport_to_shost(rport);
1154         struct fc_internal *i = to_fc_internal(shost->transportt);
1155
1156         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1157             (rport->port_state == FC_PORTSTATE_DELETED) ||
1158             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1159                 return -EBUSY;
1160         /*
1161          * Check for overflow; dev_loss_tmo is u32
1162          */
1163         if (val > UINT_MAX)
1164                 return -EINVAL;
1165
1166         /*
1167          * If fast_io_fail is off we have to cap
1168          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
1169          */
1170         if (rport->fast_io_fail_tmo == -1 &&
1171             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
1172                 return -EINVAL;
1173
1174         i->f->set_rport_dev_loss_tmo(rport, val);
1175         return 0;
1176 }
1177
1178 fc_rport_show_function(dev_loss_tmo, "%u\n", 20, )
1179 static ssize_t
1180 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
1181                             const char *buf, size_t count)
1182 {
1183         struct fc_rport *rport = transport_class_to_rport(dev);
1184         unsigned long val;
1185         int rc;
1186
1187         rc = fc_str_to_dev_loss(buf, &val);
1188         if (rc)
1189                 return rc;
1190
1191         rc = fc_rport_set_dev_loss_tmo(rport, val);
1192         if (rc)
1193                 return rc;
1194         return count;
1195 }
1196 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
1197                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1198
1199
1200 /* Private Remote Port Attributes */
1201
1202 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1203 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1204 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
1205
1206 static ssize_t
1207 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
1208                      char *buf)
1209 {
1210         struct fc_rport *rport = transport_class_to_rport(dev);
1211
1212         /* identify any roles that are port_id specific */
1213         if ((rport->port_id != -1) &&
1214             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
1215                                         FC_WELLKNOWN_PORTID_MASK) {
1216                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
1217                 case FC_FPORT_PORTID:
1218                         return snprintf(buf, 30, "Fabric Port\n");
1219                 case FC_FABCTLR_PORTID:
1220                         return snprintf(buf, 30, "Fabric Controller\n");
1221                 case FC_DIRSRVR_PORTID:
1222                         return snprintf(buf, 30, "Directory Server\n");
1223                 case FC_TIMESRVR_PORTID:
1224                         return snprintf(buf, 30, "Time Server\n");
1225                 case FC_MGMTSRVR_PORTID:
1226                         return snprintf(buf, 30, "Management Server\n");
1227                 default:
1228                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
1229                 }
1230         } else {
1231                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1232                         return snprintf(buf, 20, "unknown\n");
1233                 return get_fc_port_roles_names(rport->roles, buf);
1234         }
1235 }
1236 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1237                 show_fc_rport_roles, NULL);
1238
1239 static ssize_t fc_rport_set_marginal_state(struct device *dev,
1240                                                 struct device_attribute *attr,
1241                                                 const char *buf, size_t count)
1242 {
1243         struct fc_rport *rport = transport_class_to_rport(dev);
1244         enum fc_port_state port_state;
1245         int ret = 0;
1246
1247         ret = get_fc_port_state_match(buf, &port_state);
1248         if (ret)
1249                 return -EINVAL;
1250         if (port_state == FC_PORTSTATE_MARGINAL) {
1251                 /*
1252                  * Change the state to Marginal only if the
1253                  * current rport state is Online
1254                  * Allow only Online->Marginal
1255                  */
1256                 if (rport->port_state == FC_PORTSTATE_ONLINE)
1257                         rport->port_state = port_state;
1258                 else
1259                         return -EINVAL;
1260         } else if (port_state == FC_PORTSTATE_ONLINE) {
1261                 /*
1262                  * Change the state to Online only if the
1263                  * current rport state is Marginal
1264                  * Allow only Marginal->Online
1265                  */
1266                 if (rport->port_state == FC_PORTSTATE_MARGINAL)
1267                         rport->port_state = port_state;
1268                 else
1269                         return -EINVAL;
1270         } else
1271                 return -EINVAL;
1272         return count;
1273 }
1274
1275 static ssize_t
1276 show_fc_rport_port_state(struct device *dev,
1277                                 struct device_attribute *attr, char *buf)
1278 {
1279         const char *name;
1280         struct fc_rport *rport = transport_class_to_rport(dev);
1281
1282         name = get_fc_port_state_name(rport->port_state);
1283         if (!name)
1284                 return -EINVAL;
1285
1286         return snprintf(buf, 20, "%s\n", name);
1287 }
1288
1289 static FC_DEVICE_ATTR(rport, port_state, 0444 | 0200,
1290                         show_fc_rport_port_state, fc_rport_set_marginal_state);
1291
1292 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
1293
1294 /*
1295  * fast_io_fail_tmo attribute
1296  */
1297 static ssize_t
1298 show_fc_rport_fast_io_fail_tmo (struct device *dev,
1299                                 struct device_attribute *attr, char *buf)
1300 {
1301         struct fc_rport *rport = transport_class_to_rport(dev);
1302
1303         if (rport->fast_io_fail_tmo == -1)
1304                 return snprintf(buf, 5, "off\n");
1305         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
1306 }
1307
1308 static ssize_t
1309 store_fc_rport_fast_io_fail_tmo(struct device *dev,
1310                                 struct device_attribute *attr, const char *buf,
1311                                 size_t count)
1312 {
1313         int val;
1314         char *cp;
1315         struct fc_rport *rport = transport_class_to_rport(dev);
1316
1317         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1318             (rport->port_state == FC_PORTSTATE_DELETED) ||
1319             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1320                 return -EBUSY;
1321         if (strncmp(buf, "off", 3) == 0)
1322                 rport->fast_io_fail_tmo = -1;
1323         else {
1324                 val = simple_strtoul(buf, &cp, 0);
1325                 if ((*cp && (*cp != '\n')) || (val < 0))
1326                         return -EINVAL;
1327                 /*
1328                  * Cap fast_io_fail by dev_loss_tmo or
1329                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
1330                  */
1331                 if ((val >= rport->dev_loss_tmo) ||
1332                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
1333                         return -EINVAL;
1334
1335                 rport->fast_io_fail_tmo = val;
1336         }
1337         return count;
1338 }
1339 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1340         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1341
1342 #define fc_rport_fpin_statistic(name)                                   \
1343 static ssize_t fc_rport_fpinstat_##name(struct device *cd,              \
1344                                   struct device_attribute *attr,        \
1345                                   char *buf)                            \
1346 {                                                                       \
1347         struct fc_rport *rport = transport_class_to_rport(cd);          \
1348                                                                         \
1349         return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name);   \
1350 }                                                                       \
1351 static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL)
1352
1353 fc_rport_fpin_statistic(dn);
1354 fc_rport_fpin_statistic(dn_unknown);
1355 fc_rport_fpin_statistic(dn_timeout);
1356 fc_rport_fpin_statistic(dn_unable_to_route);
1357 fc_rport_fpin_statistic(dn_device_specific);
1358 fc_rport_fpin_statistic(cn);
1359 fc_rport_fpin_statistic(cn_clear);
1360 fc_rport_fpin_statistic(cn_lost_credit);
1361 fc_rport_fpin_statistic(cn_credit_stall);
1362 fc_rport_fpin_statistic(cn_oversubscription);
1363 fc_rport_fpin_statistic(cn_device_specific);
1364 fc_rport_fpin_statistic(li);
1365 fc_rport_fpin_statistic(li_failure_unknown);
1366 fc_rport_fpin_statistic(li_link_failure_count);
1367 fc_rport_fpin_statistic(li_loss_of_sync_count);
1368 fc_rport_fpin_statistic(li_loss_of_signals_count);
1369 fc_rport_fpin_statistic(li_prim_seq_err_count);
1370 fc_rport_fpin_statistic(li_invalid_tx_word_count);
1371 fc_rport_fpin_statistic(li_invalid_crc_count);
1372 fc_rport_fpin_statistic(li_device_specific);
1373
1374 static struct attribute *fc_rport_statistics_attrs[] = {
1375         &device_attr_rport_fpin_dn.attr,
1376         &device_attr_rport_fpin_dn_unknown.attr,
1377         &device_attr_rport_fpin_dn_timeout.attr,
1378         &device_attr_rport_fpin_dn_unable_to_route.attr,
1379         &device_attr_rport_fpin_dn_device_specific.attr,
1380         &device_attr_rport_fpin_li.attr,
1381         &device_attr_rport_fpin_li_failure_unknown.attr,
1382         &device_attr_rport_fpin_li_link_failure_count.attr,
1383         &device_attr_rport_fpin_li_loss_of_sync_count.attr,
1384         &device_attr_rport_fpin_li_loss_of_signals_count.attr,
1385         &device_attr_rport_fpin_li_prim_seq_err_count.attr,
1386         &device_attr_rport_fpin_li_invalid_tx_word_count.attr,
1387         &device_attr_rport_fpin_li_invalid_crc_count.attr,
1388         &device_attr_rport_fpin_li_device_specific.attr,
1389         &device_attr_rport_fpin_cn.attr,
1390         &device_attr_rport_fpin_cn_clear.attr,
1391         &device_attr_rport_fpin_cn_lost_credit.attr,
1392         &device_attr_rport_fpin_cn_credit_stall.attr,
1393         &device_attr_rport_fpin_cn_oversubscription.attr,
1394         &device_attr_rport_fpin_cn_device_specific.attr,
1395         NULL
1396 };
1397
1398 static struct attribute_group fc_rport_statistics_group = {
1399         .name = "statistics",
1400         .attrs = fc_rport_statistics_attrs,
1401 };
1402
1403
1404 /*
1405  * FC SCSI Target Attribute Management
1406  */
1407
1408 /*
1409  * Note: in the target show function we recognize when the remote
1410  *  port is in the hierarchy and do not allow the driver to get
1411  *  involved in sysfs functions. The driver only gets involved if
1412  *  it's the "old" style that doesn't use rports.
1413  */
1414 #define fc_starget_show_function(field, format_string, sz, cast)        \
1415 static ssize_t                                                          \
1416 show_fc_starget_##field (struct device *dev,                            \
1417                          struct device_attribute *attr, char *buf)      \
1418 {                                                                       \
1419         struct scsi_target *starget = transport_class_to_starget(dev);  \
1420         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1421         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1422         struct fc_rport *rport = starget_to_rport(starget);             \
1423         if (rport)                                                      \
1424                 fc_starget_##field(starget) = rport->field;             \
1425         else if (i->f->get_starget_##field)                             \
1426                 i->f->get_starget_##field(starget);                     \
1427         return snprintf(buf, sz, format_string,                         \
1428                 cast fc_starget_##field(starget));                      \
1429 }
1430
1431 #define fc_starget_rd_attr(field, format_string, sz)                    \
1432         fc_starget_show_function(field, format_string, sz, )            \
1433 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1434                          show_fc_starget_##field, NULL)
1435
1436 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1437         fc_starget_show_function(field, format_string, sz, (cast))      \
1438 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1439                           show_fc_starget_##field, NULL)
1440
1441 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1442         i->private_starget_attrs[count] = device_attr_starget_##field; \
1443         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1444         i->private_starget_attrs[count].store = NULL;                   \
1445         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1446         if (i->f->show_starget_##field)                                 \
1447                 count++
1448
1449 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1450         i->private_starget_attrs[count] = device_attr_starget_##field; \
1451         if (!i->f->set_starget_##field) {                               \
1452                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1453                 i->private_starget_attrs[count].store = NULL;           \
1454         }                                                               \
1455         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1456         if (i->f->show_starget_##field)                                 \
1457                 count++
1458
1459 /* The FC Transport SCSI Target Attributes: */
1460 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1461 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1462 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1463
1464
1465 /*
1466  * FC Virtual Port Attribute Management
1467  */
1468
1469 #define fc_vport_show_function(field, format_string, sz, cast)          \
1470 static ssize_t                                                          \
1471 show_fc_vport_##field (struct device *dev,                              \
1472                        struct device_attribute *attr, char *buf)        \
1473 {                                                                       \
1474         struct fc_vport *vport = transport_class_to_vport(dev);         \
1475         struct Scsi_Host *shost = vport_to_shost(vport);                \
1476         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1477         if ((i->f->get_vport_##field) &&                                \
1478             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1479                 i->f->get_vport_##field(vport);                         \
1480         return snprintf(buf, sz, format_string, cast vport->field);     \
1481 }
1482
1483 #define fc_vport_store_function(field)                                  \
1484 static ssize_t                                                          \
1485 store_fc_vport_##field(struct device *dev,                              \
1486                        struct device_attribute *attr,                   \
1487                        const char *buf, size_t count)                   \
1488 {                                                                       \
1489         int val;                                                        \
1490         struct fc_vport *vport = transport_class_to_vport(dev);         \
1491         struct Scsi_Host *shost = vport_to_shost(vport);                \
1492         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1493         char *cp;                                                       \
1494         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1495                 return -EBUSY;                                          \
1496         val = simple_strtoul(buf, &cp, 0);                              \
1497         if (*cp && (*cp != '\n'))                                       \
1498                 return -EINVAL;                                         \
1499         i->f->set_vport_##field(vport, val);                            \
1500         return count;                                                   \
1501 }
1502
1503 #define fc_vport_store_str_function(field, slen)                        \
1504 static ssize_t                                                          \
1505 store_fc_vport_##field(struct device *dev,                              \
1506                        struct device_attribute *attr,                   \
1507                        const char *buf, size_t count)                   \
1508 {                                                                       \
1509         struct fc_vport *vport = transport_class_to_vport(dev);         \
1510         struct Scsi_Host *shost = vport_to_shost(vport);                \
1511         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1512         unsigned int cnt=count;                                         \
1513                                                                         \
1514         /* count may include a LF at end of string */                   \
1515         if (buf[cnt-1] == '\n')                                         \
1516                 cnt--;                                                  \
1517         if (cnt > ((slen) - 1))                                         \
1518                 return -EINVAL;                                         \
1519         memcpy(vport->field, buf, cnt);                                 \
1520         i->f->set_vport_##field(vport);                                 \
1521         return count;                                                   \
1522 }
1523
1524 #define fc_vport_rd_attr(field, format_string, sz)                      \
1525         fc_vport_show_function(field, format_string, sz, )              \
1526 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1527                          show_fc_vport_##field, NULL)
1528
1529 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1530         fc_vport_show_function(field, format_string, sz, (cast))        \
1531 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1532                           show_fc_vport_##field, NULL)
1533
1534 #define fc_vport_rw_attr(field, format_string, sz)                      \
1535         fc_vport_show_function(field, format_string, sz, )              \
1536         fc_vport_store_function(field)                                  \
1537 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1538                         show_fc_vport_##field,                          \
1539                         store_fc_vport_##field)
1540
1541 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1542 static ssize_t                                                          \
1543 show_fc_vport_##field (struct device *dev,                              \
1544                        struct device_attribute *attr, char *buf)        \
1545 {                                                                       \
1546         struct fc_vport *vport = transport_class_to_vport(dev);         \
1547         return snprintf(buf, sz, format_string, cast vport->field);     \
1548 }
1549
1550 #define fc_private_vport_store_u32_function(field)                      \
1551 static ssize_t                                                          \
1552 store_fc_vport_##field(struct device *dev,                              \
1553                        struct device_attribute *attr,                   \
1554                        const char *buf, size_t count)                   \
1555 {                                                                       \
1556         u32 val;                                                        \
1557         struct fc_vport *vport = transport_class_to_vport(dev);         \
1558         char *cp;                                                       \
1559         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1560                 return -EBUSY;                                          \
1561         val = simple_strtoul(buf, &cp, 0);                              \
1562         if (*cp && (*cp != '\n'))                                       \
1563                 return -EINVAL;                                         \
1564         vport->field = val;                                             \
1565         return count;                                                   \
1566 }
1567
1568
1569 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1570         fc_private_vport_show_function(field, format_string, sz, )      \
1571 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1572                          show_fc_vport_##field, NULL)
1573
1574 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1575         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1576 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1577                           show_fc_vport_##field, NULL)
1578
1579 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1580         fc_private_vport_show_function(field, format_string, sz, )      \
1581         fc_private_vport_store_u32_function(field)                      \
1582 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1583                         show_fc_vport_##field,                          \
1584                         store_fc_vport_##field)
1585
1586
1587 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1588 static ssize_t                                                          \
1589 show_fc_vport_##title (struct device *dev,                              \
1590                        struct device_attribute *attr,                   \
1591                        char *buf)                                       \
1592 {                                                                       \
1593         struct fc_vport *vport = transport_class_to_vport(dev);         \
1594         const char *name;                                               \
1595         name = get_fc_##title##_name(vport->title);                     \
1596         if (!name)                                                      \
1597                 return -EINVAL;                                         \
1598         return snprintf(buf, maxlen, "%s\n", name);                     \
1599 }                                                                       \
1600 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1601                         show_fc_vport_##title, NULL)
1602
1603
1604 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1605         i->private_vport_attrs[count] = device_attr_vport_##field; \
1606         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1607         i->private_vport_attrs[count].store = NULL;                     \
1608         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1609         if (i->f->get_##field)                                          \
1610                 count++
1611         /* NOTE: Above MACRO differs: checks function not show bit */
1612
1613 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1614         i->private_vport_attrs[count] = device_attr_vport_##field; \
1615         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1616         i->private_vport_attrs[count].store = NULL;                     \
1617         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1618         count++
1619
1620 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1621         i->private_vport_attrs[count] = device_attr_vport_##field; \
1622         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1623         if (i->f->field)                                                \
1624                 count++
1625         /* NOTE: Above MACRO differs: checks function */
1626
1627 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1628         i->private_vport_attrs[count] = device_attr_vport_##field; \
1629         if (!i->f->set_vport_##field) {                                 \
1630                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1631                 i->private_vport_attrs[count].store = NULL;             \
1632         }                                                               \
1633         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1634         count++
1635         /* NOTE: Above MACRO differs: does not check show bit */
1636
1637 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1638 {                                                                       \
1639         i->private_vport_attrs[count] = device_attr_vport_##field; \
1640         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1641         count++;                                                        \
1642 }
1643
1644
1645 /* The FC Transport Virtual Port Attributes: */
1646
1647 /* Fixed Virtual Port Attributes */
1648
1649 /* Dynamic Virtual Port Attributes */
1650
1651 /* Private Virtual Port Attributes */
1652
1653 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1654 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1655 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1656 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1657
1658 static ssize_t
1659 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1660                      char *buf)
1661 {
1662         struct fc_vport *vport = transport_class_to_vport(dev);
1663
1664         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1665                 return snprintf(buf, 20, "unknown\n");
1666         return get_fc_port_roles_names(vport->roles, buf);
1667 }
1668 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1669
1670 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1671
1672 fc_private_vport_show_function(symbolic_name, "%s\n",
1673                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1674 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1675 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1676                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1677
1678 static ssize_t
1679 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1680                       const char *buf, size_t count)
1681 {
1682         struct fc_vport *vport = transport_class_to_vport(dev);
1683         struct Scsi_Host *shost = vport_to_shost(vport);
1684         unsigned long flags;
1685
1686         spin_lock_irqsave(shost->host_lock, flags);
1687         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1688                 spin_unlock_irqrestore(shost->host_lock, flags);
1689                 return -EBUSY;
1690         }
1691         vport->flags |= FC_VPORT_DELETING;
1692         spin_unlock_irqrestore(shost->host_lock, flags);
1693
1694         fc_queue_work(shost, &vport->vport_delete_work);
1695         return count;
1696 }
1697 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1698                         NULL, store_fc_vport_delete);
1699
1700
1701 /*
1702  * Enable/Disable vport
1703  *  Write "1" to disable, write "0" to enable
1704  */
1705 static ssize_t
1706 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1707                        const char *buf,
1708                            size_t count)
1709 {
1710         struct fc_vport *vport = transport_class_to_vport(dev);
1711         struct Scsi_Host *shost = vport_to_shost(vport);
1712         struct fc_internal *i = to_fc_internal(shost->transportt);
1713         int stat;
1714
1715         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1716                 return -EBUSY;
1717
1718         if (*buf == '0') {
1719                 if (vport->vport_state != FC_VPORT_DISABLED)
1720                         return -EALREADY;
1721         } else if (*buf == '1') {
1722                 if (vport->vport_state == FC_VPORT_DISABLED)
1723                         return -EALREADY;
1724         } else
1725                 return -EINVAL;
1726
1727         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1728         return stat ? stat : count;
1729 }
1730 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1731                         NULL, store_fc_vport_disable);
1732
1733
1734 /*
1735  * Host Attribute Management
1736  */
1737
1738 #define fc_host_show_function(field, format_string, sz, cast)           \
1739 static ssize_t                                                          \
1740 show_fc_host_##field (struct device *dev,                               \
1741                       struct device_attribute *attr, char *buf)         \
1742 {                                                                       \
1743         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1744         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1745         if (i->f->get_host_##field)                                     \
1746                 i->f->get_host_##field(shost);                          \
1747         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1748 }
1749
1750 #define fc_host_store_function(field)                                   \
1751 static ssize_t                                                          \
1752 store_fc_host_##field(struct device *dev,                               \
1753                       struct device_attribute *attr,                    \
1754                       const char *buf,  size_t count)                   \
1755 {                                                                       \
1756         int val;                                                        \
1757         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1758         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1759         char *cp;                                                       \
1760                                                                         \
1761         val = simple_strtoul(buf, &cp, 0);                              \
1762         if (*cp && (*cp != '\n'))                                       \
1763                 return -EINVAL;                                         \
1764         i->f->set_host_##field(shost, val);                             \
1765         return count;                                                   \
1766 }
1767
1768 #define fc_host_store_str_function(field, slen)                         \
1769 static ssize_t                                                          \
1770 store_fc_host_##field(struct device *dev,                               \
1771                       struct device_attribute *attr,                    \
1772                       const char *buf, size_t count)                    \
1773 {                                                                       \
1774         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1775         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1776         unsigned int cnt=count;                                         \
1777                                                                         \
1778         /* count may include a LF at end of string */                   \
1779         if (buf[cnt-1] == '\n')                                         \
1780                 cnt--;                                                  \
1781         if (cnt > ((slen) - 1))                                         \
1782                 return -EINVAL;                                         \
1783         memcpy(fc_host_##field(shost), buf, cnt);                       \
1784         i->f->set_host_##field(shost);                                  \
1785         return count;                                                   \
1786 }
1787
1788 #define fc_host_rd_attr(field, format_string, sz)                       \
1789         fc_host_show_function(field, format_string, sz, )               \
1790 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1791                          show_fc_host_##field, NULL)
1792
1793 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1794         fc_host_show_function(field, format_string, sz, (cast))         \
1795 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1796                           show_fc_host_##field, NULL)
1797
1798 #define fc_host_rw_attr(field, format_string, sz)                       \
1799         fc_host_show_function(field, format_string, sz, )               \
1800         fc_host_store_function(field)                                   \
1801 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1802                         show_fc_host_##field,                           \
1803                         store_fc_host_##field)
1804
1805 #define fc_host_rd_enum_attr(title, maxlen)                             \
1806 static ssize_t                                                          \
1807 show_fc_host_##title (struct device *dev,                               \
1808                       struct device_attribute *attr, char *buf)         \
1809 {                                                                       \
1810         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1811         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1812         const char *name;                                               \
1813         if (i->f->get_host_##title)                                     \
1814                 i->f->get_host_##title(shost);                          \
1815         name = get_fc_##title##_name(fc_host_##title(shost));           \
1816         if (!name)                                                      \
1817                 return -EINVAL;                                         \
1818         return snprintf(buf, maxlen, "%s\n", name);                     \
1819 }                                                                       \
1820 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1821
1822 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1823         i->private_host_attrs[count] = device_attr_host_##field;        \
1824         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1825         i->private_host_attrs[count].store = NULL;                      \
1826         i->host_attrs[count] = &i->private_host_attrs[count];           \
1827         if (i->f->show_host_##field)                                    \
1828                 count++
1829
1830 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1831         i->private_host_attrs[count] = device_attr_host_##field;        \
1832         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1833         i->private_host_attrs[count].store = NULL;                      \
1834         i->host_attrs[count] = &i->private_host_attrs[count];           \
1835         count++
1836
1837 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1838         i->private_host_attrs[count] = device_attr_host_##field;        \
1839         if (!i->f->set_host_##field) {                                  \
1840                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1841                 i->private_host_attrs[count].store = NULL;              \
1842         }                                                               \
1843         i->host_attrs[count] = &i->private_host_attrs[count];           \
1844         if (i->f->show_host_##field)                                    \
1845                 count++
1846
1847
1848 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1849 static ssize_t                                                          \
1850 show_fc_host_##field (struct device *dev,                               \
1851                       struct device_attribute *attr, char *buf)         \
1852 {                                                                       \
1853         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1854         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1855 }
1856
1857 #define fc_private_host_rd_attr(field, format_string, sz)               \
1858         fc_private_host_show_function(field, format_string, sz, )       \
1859 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1860                          show_fc_host_##field, NULL)
1861
1862 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1863         fc_private_host_show_function(field, format_string, sz, (cast)) \
1864 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1865                           show_fc_host_##field, NULL)
1866
1867 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1868         i->private_host_attrs[count] = device_attr_host_##field;        \
1869         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1870         i->private_host_attrs[count].store = NULL;                      \
1871         i->host_attrs[count] = &i->private_host_attrs[count];           \
1872         count++
1873
1874 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1875 {                                                                       \
1876         i->private_host_attrs[count] = device_attr_host_##field;        \
1877         i->host_attrs[count] = &i->private_host_attrs[count];           \
1878         count++;                                                        \
1879 }
1880
1881
1882 /* Fixed Host Attributes */
1883
1884 static ssize_t
1885 show_fc_host_supported_classes (struct device *dev,
1886                                 struct device_attribute *attr, char *buf)
1887 {
1888         struct Scsi_Host *shost = transport_class_to_shost(dev);
1889
1890         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1891                 return snprintf(buf, 20, "unspecified\n");
1892
1893         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1894 }
1895 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1896                 show_fc_host_supported_classes, NULL);
1897
1898 static ssize_t
1899 show_fc_host_supported_fc4s (struct device *dev,
1900                              struct device_attribute *attr, char *buf)
1901 {
1902         struct Scsi_Host *shost = transport_class_to_shost(dev);
1903         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1904 }
1905 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1906                 show_fc_host_supported_fc4s, NULL);
1907
1908 static ssize_t
1909 show_fc_host_supported_speeds (struct device *dev,
1910                                struct device_attribute *attr, char *buf)
1911 {
1912         struct Scsi_Host *shost = transport_class_to_shost(dev);
1913
1914         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1915                 return snprintf(buf, 20, "unknown\n");
1916
1917         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1918 }
1919 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1920                 show_fc_host_supported_speeds, NULL);
1921
1922
1923 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1924 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1925 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1926                              unsigned long long);
1927 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1928 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1929 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1930 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1931 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1932 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1933 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1934 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1935 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1936 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1937
1938
1939 /* Dynamic Host Attributes */
1940
1941 static ssize_t
1942 show_fc_host_active_fc4s (struct device *dev,
1943                           struct device_attribute *attr, char *buf)
1944 {
1945         struct Scsi_Host *shost = transport_class_to_shost(dev);
1946         struct fc_internal *i = to_fc_internal(shost->transportt);
1947
1948         if (i->f->get_host_active_fc4s)
1949                 i->f->get_host_active_fc4s(shost);
1950
1951         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1952 }
1953 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1954                 show_fc_host_active_fc4s, NULL);
1955
1956 static ssize_t
1957 show_fc_host_speed (struct device *dev,
1958                     struct device_attribute *attr, char *buf)
1959 {
1960         struct Scsi_Host *shost = transport_class_to_shost(dev);
1961         struct fc_internal *i = to_fc_internal(shost->transportt);
1962
1963         if (i->f->get_host_speed)
1964                 i->f->get_host_speed(shost);
1965
1966         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1967                 return snprintf(buf, 20, "unknown\n");
1968
1969         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1970 }
1971 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1972                 show_fc_host_speed, NULL);
1973
1974
1975 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1976 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1977 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1978 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1979 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1980
1981 fc_private_host_show_function(system_hostname, "%s\n",
1982                 FC_SYMBOLIC_NAME_SIZE + 1, )
1983 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1984 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1985                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1986
1987
1988 /* Private Host Attributes */
1989
1990 static ssize_t
1991 show_fc_private_host_tgtid_bind_type(struct device *dev,
1992                                      struct device_attribute *attr, char *buf)
1993 {
1994         struct Scsi_Host *shost = transport_class_to_shost(dev);
1995         const char *name;
1996
1997         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1998         if (!name)
1999                 return -EINVAL;
2000         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
2001 }
2002
2003 #define get_list_head_entry(pos, head, member)          \
2004         pos = list_entry((head)->next, typeof(*pos), member)
2005
2006 static ssize_t
2007 store_fc_private_host_tgtid_bind_type(struct device *dev,
2008         struct device_attribute *attr, const char *buf, size_t count)
2009 {
2010         struct Scsi_Host *shost = transport_class_to_shost(dev);
2011         struct fc_rport *rport;
2012         enum fc_tgtid_binding_type val;
2013         unsigned long flags;
2014
2015         if (get_fc_tgtid_bind_type_match(buf, &val))
2016                 return -EINVAL;
2017
2018         /* if changing bind type, purge all unused consistent bindings */
2019         if (val != fc_host_tgtid_bind_type(shost)) {
2020                 spin_lock_irqsave(shost->host_lock, flags);
2021                 while (!list_empty(&fc_host_rport_bindings(shost))) {
2022                         get_list_head_entry(rport,
2023                                 &fc_host_rport_bindings(shost), peers);
2024                         list_del(&rport->peers);
2025                         rport->port_state = FC_PORTSTATE_DELETED;
2026                         fc_queue_work(shost, &rport->rport_delete_work);
2027                 }
2028                 spin_unlock_irqrestore(shost->host_lock, flags);
2029         }
2030
2031         fc_host_tgtid_bind_type(shost) = val;
2032         return count;
2033 }
2034
2035 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
2036                         show_fc_private_host_tgtid_bind_type,
2037                         store_fc_private_host_tgtid_bind_type);
2038
2039 static ssize_t
2040 store_fc_private_host_issue_lip(struct device *dev,
2041         struct device_attribute *attr, const char *buf, size_t count)
2042 {
2043         struct Scsi_Host *shost = transport_class_to_shost(dev);
2044         struct fc_internal *i = to_fc_internal(shost->transportt);
2045         int ret;
2046
2047         /* ignore any data value written to the attribute */
2048         if (i->f->issue_fc_host_lip) {
2049                 ret = i->f->issue_fc_host_lip(shost);
2050                 return ret ? ret: count;
2051         }
2052
2053         return -ENOENT;
2054 }
2055
2056 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
2057                         store_fc_private_host_issue_lip);
2058
2059 static ssize_t
2060 store_fc_private_host_dev_loss_tmo(struct device *dev,
2061                                    struct device_attribute *attr,
2062                                    const char *buf, size_t count)
2063 {
2064         struct Scsi_Host *shost = transport_class_to_shost(dev);
2065         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2066         struct fc_rport *rport;
2067         unsigned long val, flags;
2068         int rc;
2069
2070         rc = fc_str_to_dev_loss(buf, &val);
2071         if (rc)
2072                 return rc;
2073
2074         fc_host_dev_loss_tmo(shost) = val;
2075         spin_lock_irqsave(shost->host_lock, flags);
2076         list_for_each_entry(rport, &fc_host->rports, peers)
2077                 fc_rport_set_dev_loss_tmo(rport, val);
2078         spin_unlock_irqrestore(shost->host_lock, flags);
2079         return count;
2080 }
2081
2082 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
2083 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
2084                       show_fc_host_dev_loss_tmo,
2085                       store_fc_private_host_dev_loss_tmo);
2086
2087 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
2088
2089 /*
2090  * Host Statistics Management
2091  */
2092
2093 /* Show a given attribute in the statistics group */
2094 static ssize_t
2095 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
2096 {
2097         struct Scsi_Host *shost = transport_class_to_shost(dev);
2098         struct fc_internal *i = to_fc_internal(shost->transportt);
2099         struct fc_host_statistics *stats;
2100         ssize_t ret = -ENOENT;
2101
2102         if (offset > sizeof(struct fc_host_statistics) ||
2103             offset % sizeof(u64) != 0)
2104                 WARN_ON(1);
2105
2106         if (i->f->get_fc_host_stats) {
2107                 stats = (i->f->get_fc_host_stats)(shost);
2108                 if (stats)
2109                         ret = snprintf(buf, 20, "0x%llx\n",
2110                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
2111         }
2112         return ret;
2113 }
2114
2115
2116 /* generate a read-only statistics attribute */
2117 #define fc_host_statistic(name)                                         \
2118 static ssize_t show_fcstat_##name(struct device *cd,                    \
2119                                   struct device_attribute *attr,        \
2120                                   char *buf)                            \
2121 {                                                                       \
2122         return fc_stat_show(cd, buf,                                    \
2123                             offsetof(struct fc_host_statistics, name)); \
2124 }                                                                       \
2125 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
2126
2127 fc_host_statistic(seconds_since_last_reset);
2128 fc_host_statistic(tx_frames);
2129 fc_host_statistic(tx_words);
2130 fc_host_statistic(rx_frames);
2131 fc_host_statistic(rx_words);
2132 fc_host_statistic(lip_count);
2133 fc_host_statistic(nos_count);
2134 fc_host_statistic(error_frames);
2135 fc_host_statistic(dumped_frames);
2136 fc_host_statistic(link_failure_count);
2137 fc_host_statistic(loss_of_sync_count);
2138 fc_host_statistic(loss_of_signal_count);
2139 fc_host_statistic(prim_seq_protocol_err_count);
2140 fc_host_statistic(invalid_tx_word_count);
2141 fc_host_statistic(invalid_crc_count);
2142 fc_host_statistic(fcp_input_requests);
2143 fc_host_statistic(fcp_output_requests);
2144 fc_host_statistic(fcp_control_requests);
2145 fc_host_statistic(fcp_input_megabytes);
2146 fc_host_statistic(fcp_output_megabytes);
2147 fc_host_statistic(fcp_packet_alloc_failures);
2148 fc_host_statistic(fcp_packet_aborts);
2149 fc_host_statistic(fcp_frame_alloc_failures);
2150 fc_host_statistic(fc_no_free_exch);
2151 fc_host_statistic(fc_no_free_exch_xid);
2152 fc_host_statistic(fc_xid_not_found);
2153 fc_host_statistic(fc_xid_busy);
2154 fc_host_statistic(fc_seq_not_found);
2155 fc_host_statistic(fc_non_bls_resp);
2156 fc_host_statistic(cn_sig_warn);
2157 fc_host_statistic(cn_sig_alarm);
2158
2159
2160 #define fc_host_fpin_statistic(name)                                    \
2161 static ssize_t fc_host_fpinstat_##name(struct device *cd,               \
2162                                   struct device_attribute *attr,        \
2163                                   char *buf)                            \
2164 {                                                                       \
2165         struct Scsi_Host *shost = transport_class_to_shost(cd);         \
2166         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);        \
2167                                                                         \
2168         return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \
2169 }                                                                       \
2170 static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL)
2171
2172 fc_host_fpin_statistic(dn);
2173 fc_host_fpin_statistic(dn_unknown);
2174 fc_host_fpin_statistic(dn_timeout);
2175 fc_host_fpin_statistic(dn_unable_to_route);
2176 fc_host_fpin_statistic(dn_device_specific);
2177 fc_host_fpin_statistic(cn);
2178 fc_host_fpin_statistic(cn_clear);
2179 fc_host_fpin_statistic(cn_lost_credit);
2180 fc_host_fpin_statistic(cn_credit_stall);
2181 fc_host_fpin_statistic(cn_oversubscription);
2182 fc_host_fpin_statistic(cn_device_specific);
2183 fc_host_fpin_statistic(li);
2184 fc_host_fpin_statistic(li_failure_unknown);
2185 fc_host_fpin_statistic(li_link_failure_count);
2186 fc_host_fpin_statistic(li_loss_of_sync_count);
2187 fc_host_fpin_statistic(li_loss_of_signals_count);
2188 fc_host_fpin_statistic(li_prim_seq_err_count);
2189 fc_host_fpin_statistic(li_invalid_tx_word_count);
2190 fc_host_fpin_statistic(li_invalid_crc_count);
2191 fc_host_fpin_statistic(li_device_specific);
2192
2193 static ssize_t
2194 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
2195                     const char *buf, size_t count)
2196 {
2197         struct Scsi_Host *shost = transport_class_to_shost(dev);
2198         struct fc_internal *i = to_fc_internal(shost->transportt);
2199
2200         /* ignore any data value written to the attribute */
2201         if (i->f->reset_fc_host_stats) {
2202                 i->f->reset_fc_host_stats(shost);
2203                 return count;
2204         }
2205
2206         return -ENOENT;
2207 }
2208 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
2209                                 fc_reset_statistics);
2210
2211 static struct attribute *fc_statistics_attrs[] = {
2212         &device_attr_host_seconds_since_last_reset.attr,
2213         &device_attr_host_tx_frames.attr,
2214         &device_attr_host_tx_words.attr,
2215         &device_attr_host_rx_frames.attr,
2216         &device_attr_host_rx_words.attr,
2217         &device_attr_host_lip_count.attr,
2218         &device_attr_host_nos_count.attr,
2219         &device_attr_host_error_frames.attr,
2220         &device_attr_host_dumped_frames.attr,
2221         &device_attr_host_link_failure_count.attr,
2222         &device_attr_host_loss_of_sync_count.attr,
2223         &device_attr_host_loss_of_signal_count.attr,
2224         &device_attr_host_prim_seq_protocol_err_count.attr,
2225         &device_attr_host_invalid_tx_word_count.attr,
2226         &device_attr_host_invalid_crc_count.attr,
2227         &device_attr_host_fcp_input_requests.attr,
2228         &device_attr_host_fcp_output_requests.attr,
2229         &device_attr_host_fcp_control_requests.attr,
2230         &device_attr_host_fcp_input_megabytes.attr,
2231         &device_attr_host_fcp_output_megabytes.attr,
2232         &device_attr_host_fcp_packet_alloc_failures.attr,
2233         &device_attr_host_fcp_packet_aborts.attr,
2234         &device_attr_host_fcp_frame_alloc_failures.attr,
2235         &device_attr_host_fc_no_free_exch.attr,
2236         &device_attr_host_fc_no_free_exch_xid.attr,
2237         &device_attr_host_fc_xid_not_found.attr,
2238         &device_attr_host_fc_xid_busy.attr,
2239         &device_attr_host_fc_seq_not_found.attr,
2240         &device_attr_host_fc_non_bls_resp.attr,
2241         &device_attr_host_cn_sig_warn.attr,
2242         &device_attr_host_cn_sig_alarm.attr,
2243         &device_attr_host_reset_statistics.attr,
2244         &device_attr_host_fpin_dn.attr,
2245         &device_attr_host_fpin_dn_unknown.attr,
2246         &device_attr_host_fpin_dn_timeout.attr,
2247         &device_attr_host_fpin_dn_unable_to_route.attr,
2248         &device_attr_host_fpin_dn_device_specific.attr,
2249         &device_attr_host_fpin_li.attr,
2250         &device_attr_host_fpin_li_failure_unknown.attr,
2251         &device_attr_host_fpin_li_link_failure_count.attr,
2252         &device_attr_host_fpin_li_loss_of_sync_count.attr,
2253         &device_attr_host_fpin_li_loss_of_signals_count.attr,
2254         &device_attr_host_fpin_li_prim_seq_err_count.attr,
2255         &device_attr_host_fpin_li_invalid_tx_word_count.attr,
2256         &device_attr_host_fpin_li_invalid_crc_count.attr,
2257         &device_attr_host_fpin_li_device_specific.attr,
2258         &device_attr_host_fpin_cn.attr,
2259         &device_attr_host_fpin_cn_clear.attr,
2260         &device_attr_host_fpin_cn_lost_credit.attr,
2261         &device_attr_host_fpin_cn_credit_stall.attr,
2262         &device_attr_host_fpin_cn_oversubscription.attr,
2263         &device_attr_host_fpin_cn_device_specific.attr,
2264         NULL
2265 };
2266
2267 static struct attribute_group fc_statistics_group = {
2268         .name = "statistics",
2269         .attrs = fc_statistics_attrs,
2270 };
2271
2272
2273 /* Host Vport Attributes */
2274
2275 static int
2276 fc_parse_wwn(const char *ns, u64 *nm)
2277 {
2278         unsigned int i, j;
2279         u8 wwn[8];
2280
2281         memset(wwn, 0, sizeof(wwn));
2282
2283         /* Validate and store the new name */
2284         for (i=0, j=0; i < 16; i++) {
2285                 int value;
2286
2287                 value = hex_to_bin(*ns++);
2288                 if (value >= 0)
2289                         j = (j << 4) | value;
2290                 else
2291                         return -EINVAL;
2292                 if (i % 2) {
2293                         wwn[i/2] = j & 0xff;
2294                         j = 0;
2295                 }
2296         }
2297
2298         *nm = wwn_to_u64(wwn);
2299
2300         return 0;
2301 }
2302
2303
2304 /*
2305  * "Short-cut" sysfs variable to create a new vport on a FC Host.
2306  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
2307  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
2308  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
2309  */
2310 static ssize_t
2311 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
2312                            const char *buf, size_t count)
2313 {
2314         struct Scsi_Host *shost = transport_class_to_shost(dev);
2315         struct fc_vport_identifiers vid;
2316         struct fc_vport *vport;
2317         unsigned int cnt=count;
2318         int stat;
2319
2320         memset(&vid, 0, sizeof(vid));
2321
2322         /* count may include a LF at end of string */
2323         if (buf[cnt-1] == '\n')
2324                 cnt--;
2325
2326         /* validate we have enough characters for WWPN */
2327         if ((cnt != (16+1+16)) || (buf[16] != ':'))
2328                 return -EINVAL;
2329
2330         stat = fc_parse_wwn(&buf[0], &vid.port_name);
2331         if (stat)
2332                 return stat;
2333
2334         stat = fc_parse_wwn(&buf[17], &vid.node_name);
2335         if (stat)
2336                 return stat;
2337
2338         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
2339         vid.vport_type = FC_PORTTYPE_NPIV;
2340         /* vid.symbolic_name is already zero/NULL's */
2341         vid.disable = false;            /* always enabled */
2342
2343         /* we only allow support on Channel 0 !!! */
2344         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
2345         return stat ? stat : count;
2346 }
2347 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
2348                         store_fc_host_vport_create);
2349
2350
2351 /*
2352  * "Short-cut" sysfs variable to delete a vport on a FC Host.
2353  * Vport is identified by a string containing "<WWPN>:<WWNN>".
2354  * The WWNs are specified as hex characters, and may *not* contain
2355  * any prefixes (e.g. 0x, x, etc)
2356  */
2357 static ssize_t
2358 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
2359                            const char *buf, size_t count)
2360 {
2361         struct Scsi_Host *shost = transport_class_to_shost(dev);
2362         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2363         struct fc_vport *vport;
2364         u64 wwpn, wwnn;
2365         unsigned long flags;
2366         unsigned int cnt=count;
2367         int stat, match;
2368
2369         /* count may include a LF at end of string */
2370         if (buf[cnt-1] == '\n')
2371                 cnt--;
2372
2373         /* validate we have enough characters for WWPN */
2374         if ((cnt != (16+1+16)) || (buf[16] != ':'))
2375                 return -EINVAL;
2376
2377         stat = fc_parse_wwn(&buf[0], &wwpn);
2378         if (stat)
2379                 return stat;
2380
2381         stat = fc_parse_wwn(&buf[17], &wwnn);
2382         if (stat)
2383                 return stat;
2384
2385         spin_lock_irqsave(shost->host_lock, flags);
2386         match = 0;
2387         /* we only allow support on Channel 0 !!! */
2388         list_for_each_entry(vport, &fc_host->vports, peers) {
2389                 if ((vport->channel == 0) &&
2390                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
2391                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
2392                                 break;
2393                         vport->flags |= FC_VPORT_DELETING;
2394                         match = 1;
2395                         break;
2396                 }
2397         }
2398         spin_unlock_irqrestore(shost->host_lock, flags);
2399
2400         if (!match)
2401                 return -ENODEV;
2402
2403         stat = fc_vport_terminate(vport);
2404         return stat ? stat : count;
2405 }
2406 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
2407                         store_fc_host_vport_delete);
2408
2409
2410 static int fc_host_match(struct attribute_container *cont,
2411                           struct device *dev)
2412 {
2413         struct Scsi_Host *shost;
2414         struct fc_internal *i;
2415
2416         if (!scsi_is_host_device(dev))
2417                 return 0;
2418
2419         shost = dev_to_shost(dev);
2420         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2421             != &fc_host_class.class)
2422                 return 0;
2423
2424         i = to_fc_internal(shost->transportt);
2425
2426         return &i->t.host_attrs.ac == cont;
2427 }
2428
2429 static int fc_target_match(struct attribute_container *cont,
2430                             struct device *dev)
2431 {
2432         struct Scsi_Host *shost;
2433         struct fc_internal *i;
2434
2435         if (!scsi_is_target_device(dev))
2436                 return 0;
2437
2438         shost = dev_to_shost(dev->parent);
2439         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2440             != &fc_host_class.class)
2441                 return 0;
2442
2443         i = to_fc_internal(shost->transportt);
2444
2445         return &i->t.target_attrs.ac == cont;
2446 }
2447
2448 static void fc_rport_dev_release(struct device *dev)
2449 {
2450         struct fc_rport *rport = dev_to_rport(dev);
2451         put_device(dev->parent);
2452         kfree(rport);
2453 }
2454
2455 int scsi_is_fc_rport(const struct device *dev)
2456 {
2457         return dev->release == fc_rport_dev_release;
2458 }
2459 EXPORT_SYMBOL(scsi_is_fc_rport);
2460
2461 static int fc_rport_match(struct attribute_container *cont,
2462                             struct device *dev)
2463 {
2464         struct Scsi_Host *shost;
2465         struct fc_internal *i;
2466
2467         if (!scsi_is_fc_rport(dev))
2468                 return 0;
2469
2470         shost = dev_to_shost(dev->parent);
2471         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2472             != &fc_host_class.class)
2473                 return 0;
2474
2475         i = to_fc_internal(shost->transportt);
2476
2477         return &i->rport_attr_cont.ac == cont;
2478 }
2479
2480
2481 static void fc_vport_dev_release(struct device *dev)
2482 {
2483         struct fc_vport *vport = dev_to_vport(dev);
2484         put_device(dev->parent);                /* release kobj parent */
2485         kfree(vport);
2486 }
2487
2488 static int scsi_is_fc_vport(const struct device *dev)
2489 {
2490         return dev->release == fc_vport_dev_release;
2491 }
2492
2493 static int fc_vport_match(struct attribute_container *cont,
2494                             struct device *dev)
2495 {
2496         struct fc_vport *vport;
2497         struct Scsi_Host *shost;
2498         struct fc_internal *i;
2499
2500         if (!scsi_is_fc_vport(dev))
2501                 return 0;
2502         vport = dev_to_vport(dev);
2503
2504         shost = vport_to_shost(vport);
2505         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2506             != &fc_host_class.class)
2507                 return 0;
2508
2509         i = to_fc_internal(shost->transportt);
2510         return &i->vport_attr_cont.ac == cont;
2511 }
2512
2513
2514 /**
2515  * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2516  * @scmd:       The SCSI command which timed out
2517  *
2518  * This routine protects against error handlers getting invoked while a
2519  * rport is in a blocked state, typically due to a temporarily loss of
2520  * connectivity. If the error handlers are allowed to proceed, requests
2521  * to abort i/o, reset the target, etc will likely fail as there is no way
2522  * to communicate with the device to perform the requested function. These
2523  * failures may result in the midlayer taking the device offline, requiring
2524  * manual intervention to restore operation.
2525  *
2526  * This routine, called whenever an i/o times out, validates the state of
2527  * the underlying rport. If the rport is blocked, it returns
2528  * EH_RESET_TIMER, which will continue to reschedule the timeout.
2529  * Eventually, either the device will return, or devloss_tmo will fire,
2530  * and when the timeout then fires, it will be handled normally.
2531  * If the rport is not blocked, normal error handling continues.
2532  *
2533  * Notes:
2534  *      This routine assumes no locks are held on entry.
2535  */
2536 enum scsi_timeout_action fc_eh_timed_out(struct scsi_cmnd *scmd)
2537 {
2538         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2539
2540         if (rport->port_state == FC_PORTSTATE_BLOCKED)
2541                 return SCSI_EH_RESET_TIMER;
2542
2543         return SCSI_EH_NOT_HANDLED;
2544 }
2545 EXPORT_SYMBOL(fc_eh_timed_out);
2546
2547 /*
2548  * Called by fc_user_scan to locate an rport on the shost that
2549  * matches the channel and target id, and invoke scsi_scan_target()
2550  * on the rport.
2551  */
2552 static void
2553 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2554 {
2555         struct fc_rport *rport;
2556         unsigned long flags;
2557
2558         spin_lock_irqsave(shost->host_lock, flags);
2559
2560         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2561                 if (rport->scsi_target_id == -1)
2562                         continue;
2563
2564                 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
2565                         (rport->port_state != FC_PORTSTATE_MARGINAL))
2566                         continue;
2567
2568                 if ((channel == rport->channel) &&
2569                     (id == rport->scsi_target_id)) {
2570                         spin_unlock_irqrestore(shost->host_lock, flags);
2571                         scsi_scan_target(&rport->dev, channel, id, lun,
2572                                          SCSI_SCAN_MANUAL);
2573                         return;
2574                 }
2575         }
2576
2577         spin_unlock_irqrestore(shost->host_lock, flags);
2578 }
2579
2580 /*
2581  * Called via sysfs scan routines. Necessary, as the FC transport
2582  * wants to place all target objects below the rport object. So this
2583  * routine must invoke the scsi_scan_target() routine with the rport
2584  * object as the parent.
2585  */
2586 static int
2587 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2588 {
2589         uint chlo, chhi;
2590         uint tgtlo, tgthi;
2591
2592         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2593             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2594             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2595                 return -EINVAL;
2596
2597         if (channel == SCAN_WILD_CARD) {
2598                 chlo = 0;
2599                 chhi = shost->max_channel + 1;
2600         } else {
2601                 chlo = channel;
2602                 chhi = channel + 1;
2603         }
2604
2605         if (id == SCAN_WILD_CARD) {
2606                 tgtlo = 0;
2607                 tgthi = shost->max_id;
2608         } else {
2609                 tgtlo = id;
2610                 tgthi = id + 1;
2611         }
2612
2613         for ( ; chlo < chhi; chlo++)
2614                 for ( ; tgtlo < tgthi; tgtlo++)
2615                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2616
2617         return 0;
2618 }
2619
2620 struct scsi_transport_template *
2621 fc_attach_transport(struct fc_function_template *ft)
2622 {
2623         int count;
2624         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2625                                         GFP_KERNEL);
2626
2627         if (unlikely(!i))
2628                 return NULL;
2629
2630         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2631         i->t.target_attrs.ac.class = &fc_transport_class.class;
2632         i->t.target_attrs.ac.match = fc_target_match;
2633         i->t.target_size = sizeof(struct fc_starget_attrs);
2634         transport_container_register(&i->t.target_attrs);
2635
2636         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2637         i->t.host_attrs.ac.class = &fc_host_class.class;
2638         i->t.host_attrs.ac.match = fc_host_match;
2639         i->t.host_size = sizeof(struct fc_host_attrs);
2640         if (ft->get_fc_host_stats)
2641                 i->t.host_attrs.statistics = &fc_statistics_group;
2642         transport_container_register(&i->t.host_attrs);
2643
2644         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2645         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2646         i->rport_attr_cont.ac.match = fc_rport_match;
2647         i->rport_attr_cont.statistics = &fc_rport_statistics_group;
2648         transport_container_register(&i->rport_attr_cont);
2649
2650         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2651         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2652         i->vport_attr_cont.ac.match = fc_vport_match;
2653         transport_container_register(&i->vport_attr_cont);
2654
2655         i->f = ft;
2656
2657         /* Transport uses the shost workq for scsi scanning */
2658         i->t.create_work_queue = 1;
2659
2660         i->t.user_scan = fc_user_scan;
2661
2662         /*
2663          * Setup SCSI Target Attributes.
2664          */
2665         count = 0;
2666         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2667         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2668         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2669
2670         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2671
2672         i->starget_attrs[count] = NULL;
2673
2674
2675         /*
2676          * Setup SCSI Host Attributes.
2677          */
2678         count=0;
2679         SETUP_HOST_ATTRIBUTE_RD(node_name);
2680         SETUP_HOST_ATTRIBUTE_RD(port_name);
2681         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2682         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2683         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2684         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2685         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2686         if (ft->vport_create) {
2687                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2688                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2689         }
2690         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2691         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2692         SETUP_HOST_ATTRIBUTE_RD(model);
2693         SETUP_HOST_ATTRIBUTE_RD(model_description);
2694         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2695         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2696         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2697         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2698
2699         SETUP_HOST_ATTRIBUTE_RD(port_id);
2700         SETUP_HOST_ATTRIBUTE_RD(port_type);
2701         SETUP_HOST_ATTRIBUTE_RD(port_state);
2702         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2703         SETUP_HOST_ATTRIBUTE_RD(speed);
2704         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2705         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2706         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2707
2708         /* Transport-managed attributes */
2709         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2710         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2711         if (ft->issue_fc_host_lip)
2712                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2713         if (ft->vport_create)
2714                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2715         if (ft->vport_delete)
2716                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2717
2718         BUG_ON(count > FC_HOST_NUM_ATTRS);
2719
2720         i->host_attrs[count] = NULL;
2721
2722         /*
2723          * Setup Remote Port Attributes.
2724          */
2725         count=0;
2726         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2727         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2728         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2729         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2730         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2731         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2732         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2733         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(port_state);
2734         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2735         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2736
2737         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2738
2739         i->rport_attrs[count] = NULL;
2740
2741         /*
2742          * Setup Virtual Port Attributes.
2743          */
2744         count=0;
2745         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2746         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2747         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2748         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2749         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2750         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2751         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2752         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2753         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2754
2755         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2756
2757         i->vport_attrs[count] = NULL;
2758
2759         return &i->t;
2760 }
2761 EXPORT_SYMBOL(fc_attach_transport);
2762
2763 void fc_release_transport(struct scsi_transport_template *t)
2764 {
2765         struct fc_internal *i = to_fc_internal(t);
2766
2767         transport_container_unregister(&i->t.target_attrs);
2768         transport_container_unregister(&i->t.host_attrs);
2769         transport_container_unregister(&i->rport_attr_cont);
2770         transport_container_unregister(&i->vport_attr_cont);
2771
2772         kfree(i);
2773 }
2774 EXPORT_SYMBOL(fc_release_transport);
2775
2776 /**
2777  * fc_queue_work - Queue work to the fc_host workqueue.
2778  * @shost:      Pointer to Scsi_Host bound to fc_host.
2779  * @work:       Work to queue for execution.
2780  *
2781  * Return value:
2782  *      1 - work queued for execution
2783  *      0 - work is already queued
2784  *      -EINVAL - work queue doesn't exist
2785  */
2786 static int
2787 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2788 {
2789         if (unlikely(!fc_host_work_q(shost))) {
2790                 printk(KERN_ERR
2791                         "ERROR: FC host '%s' attempted to queue work, "
2792                         "when no workqueue created.\n", shost->hostt->name);
2793                 dump_stack();
2794
2795                 return -EINVAL;
2796         }
2797
2798         return queue_work(fc_host_work_q(shost), work);
2799 }
2800
2801 /**
2802  * fc_flush_work - Flush a fc_host's workqueue.
2803  * @shost:      Pointer to Scsi_Host bound to fc_host.
2804  */
2805 static void
2806 fc_flush_work(struct Scsi_Host *shost)
2807 {
2808         if (!fc_host_work_q(shost)) {
2809                 printk(KERN_ERR
2810                         "ERROR: FC host '%s' attempted to flush work, "
2811                         "when no workqueue created.\n", shost->hostt->name);
2812                 dump_stack();
2813                 return;
2814         }
2815
2816         flush_workqueue(fc_host_work_q(shost));
2817 }
2818
2819 /**
2820  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2821  * @shost:      Pointer to Scsi_Host bound to fc_host.
2822  * @work:       Work to queue for execution.
2823  * @delay:      jiffies to delay the work queuing
2824  *
2825  * Return value:
2826  *      1 on success / 0 already queued / < 0 for error
2827  */
2828 static int
2829 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2830                                 unsigned long delay)
2831 {
2832         if (unlikely(!fc_host_devloss_work_q(shost))) {
2833                 printk(KERN_ERR
2834                         "ERROR: FC host '%s' attempted to queue work, "
2835                         "when no workqueue created.\n", shost->hostt->name);
2836                 dump_stack();
2837
2838                 return -EINVAL;
2839         }
2840
2841         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2842 }
2843
2844 /**
2845  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2846  * @shost:      Pointer to Scsi_Host bound to fc_host.
2847  */
2848 static void
2849 fc_flush_devloss(struct Scsi_Host *shost)
2850 {
2851         if (!fc_host_devloss_work_q(shost)) {
2852                 printk(KERN_ERR
2853                         "ERROR: FC host '%s' attempted to flush work, "
2854                         "when no workqueue created.\n", shost->hostt->name);
2855                 dump_stack();
2856                 return;
2857         }
2858
2859         flush_workqueue(fc_host_devloss_work_q(shost));
2860 }
2861
2862
2863 /**
2864  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2865  * @shost:      Which &Scsi_Host
2866  *
2867  * This routine is expected to be called immediately preceding the
2868  * a driver's call to scsi_remove_host().
2869  *
2870  * WARNING: A driver utilizing the fc_transport, which fails to call
2871  *   this routine prior to scsi_remove_host(), will leave dangling
2872  *   objects in /sys/class/fc_remote_ports. Access to any of these
2873  *   objects can result in a system crash !!!
2874  *
2875  * Notes:
2876  *      This routine assumes no locks are held on entry.
2877  */
2878 void
2879 fc_remove_host(struct Scsi_Host *shost)
2880 {
2881         struct fc_vport *vport = NULL, *next_vport = NULL;
2882         struct fc_rport *rport = NULL, *next_rport = NULL;
2883         struct workqueue_struct *work_q;
2884         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2885         unsigned long flags;
2886
2887         spin_lock_irqsave(shost->host_lock, flags);
2888
2889         /* Remove any vports */
2890         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2891                 vport->flags |= FC_VPORT_DELETING;
2892                 fc_queue_work(shost, &vport->vport_delete_work);
2893         }
2894
2895         /* Remove any remote ports */
2896         list_for_each_entry_safe(rport, next_rport,
2897                         &fc_host->rports, peers) {
2898                 list_del(&rport->peers);
2899                 rport->port_state = FC_PORTSTATE_DELETED;
2900                 fc_queue_work(shost, &rport->rport_delete_work);
2901         }
2902
2903         list_for_each_entry_safe(rport, next_rport,
2904                         &fc_host->rport_bindings, peers) {
2905                 list_del(&rport->peers);
2906                 rport->port_state = FC_PORTSTATE_DELETED;
2907                 fc_queue_work(shost, &rport->rport_delete_work);
2908         }
2909
2910         spin_unlock_irqrestore(shost->host_lock, flags);
2911
2912         /* flush all scan work items */
2913         scsi_flush_work(shost);
2914
2915         /* flush all stgt delete, and rport delete work items, then kill it  */
2916         if (fc_host->work_q) {
2917                 work_q = fc_host->work_q;
2918                 fc_host->work_q = NULL;
2919                 destroy_workqueue(work_q);
2920         }
2921
2922         /* flush all devloss work items, then kill it  */
2923         if (fc_host->devloss_work_q) {
2924                 work_q = fc_host->devloss_work_q;
2925                 fc_host->devloss_work_q = NULL;
2926                 destroy_workqueue(work_q);
2927         }
2928 }
2929 EXPORT_SYMBOL(fc_remove_host);
2930
2931 static void fc_terminate_rport_io(struct fc_rport *rport)
2932 {
2933         struct Scsi_Host *shost = rport_to_shost(rport);
2934         struct fc_internal *i = to_fc_internal(shost->transportt);
2935
2936         /* Involve the LLDD if possible to terminate all io on the rport. */
2937         if (i->f->terminate_rport_io)
2938                 i->f->terminate_rport_io(rport);
2939
2940         /*
2941          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2942          */
2943         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2944 }
2945
2946 /**
2947  * fc_starget_delete - called to delete the scsi descendants of an rport
2948  * @work:       remote port to be operated on.
2949  *
2950  * Deletes target and all sdevs.
2951  */
2952 static void
2953 fc_starget_delete(struct work_struct *work)
2954 {
2955         struct fc_rport *rport =
2956                 container_of(work, struct fc_rport, stgt_delete_work);
2957
2958         fc_terminate_rport_io(rport);
2959         scsi_remove_target(&rport->dev);
2960 }
2961
2962
2963 /**
2964  * fc_rport_final_delete - finish rport termination and delete it.
2965  * @work:       remote port to be deleted.
2966  */
2967 static void
2968 fc_rport_final_delete(struct work_struct *work)
2969 {
2970         struct fc_rport *rport =
2971                 container_of(work, struct fc_rport, rport_delete_work);
2972         struct device *dev = &rport->dev;
2973         struct Scsi_Host *shost = rport_to_shost(rport);
2974         struct fc_internal *i = to_fc_internal(shost->transportt);
2975         unsigned long flags;
2976         int do_callback = 0;
2977
2978         fc_terminate_rport_io(rport);
2979
2980         /*
2981          * if a scan is pending, flush the SCSI Host work_q so that
2982          * that we can reclaim the rport scan work element.
2983          */
2984         if (rport->flags & FC_RPORT_SCAN_PENDING)
2985                 scsi_flush_work(shost);
2986
2987         /*
2988          * Cancel any outstanding timers. These should really exist
2989          * only when rmmod'ing the LLDD and we're asking for
2990          * immediate termination of the rports
2991          */
2992         spin_lock_irqsave(shost->host_lock, flags);
2993         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2994                 spin_unlock_irqrestore(shost->host_lock, flags);
2995                 if (!cancel_delayed_work(&rport->fail_io_work))
2996                         fc_flush_devloss(shost);
2997                 if (!cancel_delayed_work(&rport->dev_loss_work))
2998                         fc_flush_devloss(shost);
2999                 cancel_work_sync(&rport->scan_work);
3000                 spin_lock_irqsave(shost->host_lock, flags);
3001                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3002         }
3003         spin_unlock_irqrestore(shost->host_lock, flags);
3004
3005         /* Delete SCSI target and sdevs */
3006         if (rport->scsi_target_id != -1)
3007                 fc_starget_delete(&rport->stgt_delete_work);
3008
3009         /*
3010          * Notify the driver that the rport is now dead. The LLDD will
3011          * also guarantee that any communication to the rport is terminated
3012          *
3013          * Avoid this call if we already called it when we preserved the
3014          * rport for the binding.
3015          */
3016         spin_lock_irqsave(shost->host_lock, flags);
3017         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
3018             (i->f->dev_loss_tmo_callbk)) {
3019                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3020                 do_callback = 1;
3021         }
3022         spin_unlock_irqrestore(shost->host_lock, flags);
3023
3024         if (do_callback)
3025                 i->f->dev_loss_tmo_callbk(rport);
3026
3027         fc_bsg_remove(rport->rqst_q);
3028
3029         transport_remove_device(dev);
3030         device_del(dev);
3031         transport_destroy_device(dev);
3032         scsi_host_put(shost);                   /* for fc_host->rport list */
3033         put_device(dev);                        /* for self-reference */
3034 }
3035
3036
3037 /**
3038  * fc_remote_port_create - allocates and creates a remote FC port.
3039  * @shost:      scsi host the remote port is connected to.
3040  * @channel:    Channel on shost port connected to.
3041  * @ids:        The world wide names, fc address, and FC4 port
3042  *              roles for the remote port.
3043  *
3044  * Allocates and creates the remoter port structure, including the
3045  * class and sysfs creation.
3046  *
3047  * Notes:
3048  *      This routine assumes no locks are held on entry.
3049  */
3050 static struct fc_rport *
3051 fc_remote_port_create(struct Scsi_Host *shost, int channel,
3052                       struct fc_rport_identifiers  *ids)
3053 {
3054         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3055         struct fc_internal *fci = to_fc_internal(shost->transportt);
3056         struct fc_rport *rport;
3057         struct device *dev;
3058         unsigned long flags;
3059         int error;
3060         size_t size;
3061
3062         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
3063         rport = kzalloc(size, GFP_KERNEL);
3064         if (unlikely(!rport)) {
3065                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3066                 return NULL;
3067         }
3068
3069         rport->maxframe_size = -1;
3070         rport->supported_classes = FC_COS_UNSPECIFIED;
3071         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
3072         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
3073         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
3074         rport->port_id = ids->port_id;
3075         rport->roles = ids->roles;
3076         rport->port_state = FC_PORTSTATE_ONLINE;
3077         if (fci->f->dd_fcrport_size)
3078                 rport->dd_data = &rport[1];
3079         rport->channel = channel;
3080         rport->fast_io_fail_tmo = -1;
3081
3082         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
3083         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
3084         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
3085         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
3086         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
3087
3088         spin_lock_irqsave(shost->host_lock, flags);
3089
3090         rport->number = fc_host->next_rport_number++;
3091         if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
3092             (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
3093                 rport->scsi_target_id = fc_host->next_target_id++;
3094         else
3095                 rport->scsi_target_id = -1;
3096         list_add_tail(&rport->peers, &fc_host->rports);
3097         scsi_host_get(shost);                   /* for fc_host->rport list */
3098
3099         spin_unlock_irqrestore(shost->host_lock, flags);
3100
3101         dev = &rport->dev;
3102         device_initialize(dev);                 /* takes self reference */
3103         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
3104         dev->release = fc_rport_dev_release;
3105         dev_set_name(dev, "rport-%d:%d-%d",
3106                      shost->host_no, channel, rport->number);
3107         transport_setup_device(dev);
3108
3109         error = device_add(dev);
3110         if (error) {
3111                 printk(KERN_ERR "FC Remote Port device_add failed\n");
3112                 goto delete_rport;
3113         }
3114         transport_add_device(dev);
3115         transport_configure_device(dev);
3116
3117         fc_bsg_rportadd(shost, rport);
3118         /* ignore any bsg add error - we just can't do sgio */
3119
3120         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
3121                 /* initiate a scan of the target */
3122                 rport->flags |= FC_RPORT_SCAN_PENDING;
3123                 scsi_queue_work(shost, &rport->scan_work);
3124         }
3125
3126         return rport;
3127
3128 delete_rport:
3129         transport_destroy_device(dev);
3130         spin_lock_irqsave(shost->host_lock, flags);
3131         list_del(&rport->peers);
3132         scsi_host_put(shost);                   /* for fc_host->rport list */
3133         spin_unlock_irqrestore(shost->host_lock, flags);
3134         put_device(dev->parent);
3135         kfree(rport);
3136         return NULL;
3137 }
3138
3139 /**
3140  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
3141  * @shost:      scsi host the remote port is connected to.
3142  * @channel:    Channel on shost port connected to.
3143  * @ids:        The world wide names, fc address, and FC4 port
3144  *              roles for the remote port.
3145  *
3146  * The LLDD calls this routine to notify the transport of the existence
3147  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
3148  * of the port, it's FC address (port_id), and the FC4 roles that are
3149  * active for the port.
3150  *
3151  * For ports that are FCP targets (aka scsi targets), the FC transport
3152  * maintains consistent target id bindings on behalf of the LLDD.
3153  * A consistent target id binding is an assignment of a target id to
3154  * a remote port identifier, which persists while the scsi host is
3155  * attached. The remote port can disappear, then later reappear, and
3156  * it's target id assignment remains the same. This allows for shifts
3157  * in FC addressing (if binding by wwpn or wwnn) with no apparent
3158  * changes to the scsi subsystem which is based on scsi host number and
3159  * target id values.  Bindings are only valid during the attachment of
3160  * the scsi host. If the host detaches, then later re-attaches, target
3161  * id bindings may change.
3162  *
3163  * This routine is responsible for returning a remote port structure.
3164  * The routine will search the list of remote ports it maintains
3165  * internally on behalf of consistent target id mappings. If found, the
3166  * remote port structure will be reused. Otherwise, a new remote port
3167  * structure will be allocated.
3168  *
3169  * Whenever a remote port is allocated, a new fc_remote_port class
3170  * device is created.
3171  *
3172  * Should not be called from interrupt context.
3173  *
3174  * Notes:
3175  *      This routine assumes no locks are held on entry.
3176  */
3177 struct fc_rport *
3178 fc_remote_port_add(struct Scsi_Host *shost, int channel,
3179         struct fc_rport_identifiers  *ids)
3180 {
3181         struct fc_internal *fci = to_fc_internal(shost->transportt);
3182         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3183         struct fc_rport *rport;
3184         unsigned long flags;
3185         int match = 0;
3186
3187         /* ensure any stgt delete functions are done */
3188         fc_flush_work(shost);
3189
3190         /*
3191          * Search the list of "active" rports, for an rport that has been
3192          * deleted, but we've held off the real delete while the target
3193          * is in a "blocked" state.
3194          */
3195         spin_lock_irqsave(shost->host_lock, flags);
3196
3197         list_for_each_entry(rport, &fc_host->rports, peers) {
3198
3199                 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
3200                      rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
3201                         (rport->channel == channel)) {
3202
3203                         switch (fc_host->tgtid_bind_type) {
3204                         case FC_TGTID_BIND_BY_WWPN:
3205                         case FC_TGTID_BIND_NONE:
3206                                 if (rport->port_name == ids->port_name)
3207                                         match = 1;
3208                                 break;
3209                         case FC_TGTID_BIND_BY_WWNN:
3210                                 if (rport->node_name == ids->node_name)
3211                                         match = 1;
3212                                 break;
3213                         case FC_TGTID_BIND_BY_ID:
3214                                 if (rport->port_id == ids->port_id)
3215                                         match = 1;
3216                                 break;
3217                         }
3218
3219                         if (match) {
3220
3221                                 memcpy(&rport->node_name, &ids->node_name,
3222                                         sizeof(rport->node_name));
3223                                 memcpy(&rport->port_name, &ids->port_name,
3224                                         sizeof(rport->port_name));
3225                                 rport->port_id = ids->port_id;
3226
3227                                 rport->port_state = FC_PORTSTATE_ONLINE;
3228                                 rport->roles = ids->roles;
3229
3230                                 spin_unlock_irqrestore(shost->host_lock, flags);
3231
3232                                 if (fci->f->dd_fcrport_size)
3233                                         memset(rport->dd_data, 0,
3234                                                 fci->f->dd_fcrport_size);
3235
3236                                 /*
3237                                  * If we were not a target, cancel the
3238                                  * io terminate and rport timers, and
3239                                  * we're done.
3240                                  *
3241                                  * If we were a target, but our new role
3242                                  * doesn't indicate a target, leave the
3243                                  * timers running expecting the role to
3244                                  * change as the target fully logs in. If
3245                                  * it doesn't, the target will be torn down.
3246                                  *
3247                                  * If we were a target, and our role shows
3248                                  * we're still a target, cancel the timers
3249                                  * and kick off a scan.
3250                                  */
3251
3252                                 /* was a target, not in roles */
3253                                 if ((rport->scsi_target_id != -1) &&
3254                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
3255                                         return rport;
3256
3257                                 /*
3258                                  * Stop the fail io and dev_loss timers.
3259                                  * If they flush, the port_state will
3260                                  * be checked and will NOOP the function.
3261                                  */
3262                                 if (!cancel_delayed_work(&rport->fail_io_work))
3263                                         fc_flush_devloss(shost);
3264                                 if (!cancel_delayed_work(&rport->dev_loss_work))
3265                                         fc_flush_devloss(shost);
3266
3267                                 spin_lock_irqsave(shost->host_lock, flags);
3268
3269                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3270                                                   FC_RPORT_DEVLOSS_PENDING |
3271                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3272
3273                                 spin_unlock_irqrestore(shost->host_lock, flags);
3274
3275                                 /* if target, initiate a scan */
3276                                 if (rport->scsi_target_id != -1) {
3277                                         scsi_target_unblock(&rport->dev,
3278                                                             SDEV_RUNNING);
3279                                         spin_lock_irqsave(shost->host_lock,
3280                                                           flags);
3281                                         rport->flags |= FC_RPORT_SCAN_PENDING;
3282                                         scsi_queue_work(shost,
3283                                                         &rport->scan_work);
3284                                         spin_unlock_irqrestore(shost->host_lock,
3285                                                         flags);
3286                                 }
3287
3288                                 fc_bsg_goose_queue(rport);
3289
3290                                 return rport;
3291                         }
3292                 }
3293         }
3294
3295         /*
3296          * Search the bindings array
3297          * Note: if never a FCP target, you won't be on this list
3298          */
3299         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
3300
3301                 /* search for a matching consistent binding */
3302
3303                 list_for_each_entry(rport, &fc_host->rport_bindings,
3304                                         peers) {
3305                         if (rport->channel != channel)
3306                                 continue;
3307
3308                         switch (fc_host->tgtid_bind_type) {
3309                         case FC_TGTID_BIND_BY_WWPN:
3310                                 if (rport->port_name == ids->port_name)
3311                                         match = 1;
3312                                 break;
3313                         case FC_TGTID_BIND_BY_WWNN:
3314                                 if (rport->node_name == ids->node_name)
3315                                         match = 1;
3316                                 break;
3317                         case FC_TGTID_BIND_BY_ID:
3318                                 if (rport->port_id == ids->port_id)
3319                                         match = 1;
3320                                 break;
3321                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3322                                 break;
3323                         }
3324
3325                         if (match) {
3326                                 list_move_tail(&rport->peers, &fc_host->rports);
3327                                 break;
3328                         }
3329                 }
3330
3331                 if (match) {
3332                         memcpy(&rport->node_name, &ids->node_name,
3333                                 sizeof(rport->node_name));
3334                         memcpy(&rport->port_name, &ids->port_name,
3335                                 sizeof(rport->port_name));
3336                         rport->port_id = ids->port_id;
3337                         rport->port_state = FC_PORTSTATE_ONLINE;
3338                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3339
3340                         if (fci->f->dd_fcrport_size)
3341                                 memset(rport->dd_data, 0,
3342                                                 fci->f->dd_fcrport_size);
3343                         spin_unlock_irqrestore(shost->host_lock, flags);
3344
3345                         fc_remote_port_rolechg(rport, ids->roles);
3346                         return rport;
3347                 }
3348         }
3349
3350         spin_unlock_irqrestore(shost->host_lock, flags);
3351
3352         /* No consistent binding found - create new remote port entry */
3353         rport = fc_remote_port_create(shost, channel, ids);
3354
3355         return rport;
3356 }
3357 EXPORT_SYMBOL(fc_remote_port_add);
3358
3359
3360 /**
3361  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
3362  * @rport:      The remote port that no longer exists
3363  *
3364  * The LLDD calls this routine to notify the transport that a remote
3365  * port is no longer part of the topology. Note: Although a port
3366  * may no longer be part of the topology, it may persist in the remote
3367  * ports displayed by the fc_host. We do this under 2 conditions:
3368  *
3369  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
3370  *    This allows the port to temporarily disappear, then reappear without
3371  *    disrupting the SCSI device tree attached to it. During the "blocked"
3372  *    period the port will still exist.
3373  *
3374  * 2) If the port was a scsi target and disappears for longer than we
3375  *    expect, we'll delete the port and the tear down the SCSI device tree
3376  *    attached to it. However, we want to semi-persist the target id assigned
3377  *    to that port if it eventually does exist. The port structure will
3378  *    remain (although with minimal information) so that the target id
3379  *    bindings also remain.
3380  *
3381  * If the remote port is not an FCP Target, it will be fully torn down
3382  * and deallocated, including the fc_remote_port class device.
3383  *
3384  * If the remote port is an FCP Target, the port will be placed in a
3385  * temporary blocked state. From the LLDD's perspective, the rport no
3386  * longer exists. From the SCSI midlayer's perspective, the SCSI target
3387  * exists, but all sdevs on it are blocked from further I/O. The following
3388  * is then expected.
3389  *
3390  *   If the remote port does not return (signaled by a LLDD call to
3391  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
3392  *   scsi target is removed - killing all outstanding i/o and removing the
3393  *   scsi devices attached to it. The port structure will be marked Not
3394  *   Present and be partially cleared, leaving only enough information to
3395  *   recognize the remote port relative to the scsi target id binding if
3396  *   it later appears.  The port will remain as long as there is a valid
3397  *   binding (e.g. until the user changes the binding type or unloads the
3398  *   scsi host with the binding).
3399  *
3400  *   If the remote port returns within the dev_loss_tmo value (and matches
3401  *   according to the target id binding type), the port structure will be
3402  *   reused. If it is no longer a SCSI target, the target will be torn
3403  *   down. If it continues to be a SCSI target, then the target will be
3404  *   unblocked (allowing i/o to be resumed), and a scan will be activated
3405  *   to ensure that all luns are detected.
3406  *
3407  * Called from normal process context only - cannot be called from interrupt.
3408  *
3409  * Notes:
3410  *      This routine assumes no locks are held on entry.
3411  */
3412 void
3413 fc_remote_port_delete(struct fc_rport  *rport)
3414 {
3415         struct Scsi_Host *shost = rport_to_shost(rport);
3416         unsigned long timeout = rport->dev_loss_tmo;
3417         unsigned long flags;
3418
3419         /*
3420          * No need to flush the fc_host work_q's, as all adds are synchronous.
3421          *
3422          * We do need to reclaim the rport scan work element, so eventually
3423          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
3424          * there's still a scan pending.
3425          */
3426
3427         spin_lock_irqsave(shost->host_lock, flags);
3428
3429         if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
3430                 (rport->port_state != FC_PORTSTATE_MARGINAL)) {
3431                 spin_unlock_irqrestore(shost->host_lock, flags);
3432                 return;
3433         }
3434
3435         /*
3436          * In the past, we if this was not an FCP-Target, we would
3437          * unconditionally just jump to deleting the rport.
3438          * However, rports can be used as node containers by the LLDD,
3439          * and its not appropriate to just terminate the rport at the
3440          * first sign of a loss in connectivity. The LLDD may want to
3441          * send ELS traffic to re-validate the login. If the rport is
3442          * immediately deleted, it makes it inappropriate for a node
3443          * container.
3444          * So... we now unconditionally wait dev_loss_tmo before
3445          * destroying an rport.
3446          */
3447
3448         rport->port_state = FC_PORTSTATE_BLOCKED;
3449
3450         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3451
3452         spin_unlock_irqrestore(shost->host_lock, flags);
3453
3454         scsi_block_targets(shost, &rport->dev);
3455
3456         /* see if we need to kill io faster than waiting for device loss */
3457         if ((rport->fast_io_fail_tmo != -1) &&
3458             (rport->fast_io_fail_tmo < timeout))
3459                 fc_queue_devloss_work(shost, &rport->fail_io_work,
3460                                         rport->fast_io_fail_tmo * HZ);
3461
3462         /* cap the length the devices can be blocked until they are deleted */
3463         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3464 }
3465 EXPORT_SYMBOL(fc_remote_port_delete);
3466
3467 /**
3468  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3469  * @rport:      The remote port that changed.
3470  * @roles:      New roles for this port.
3471  *
3472  * Description: The LLDD calls this routine to notify the transport that the
3473  * roles on a remote port may have changed. The largest effect of this is
3474  * if a port now becomes a FCP Target, it must be allocated a
3475  * scsi target id.  If the port is no longer a FCP target, any
3476  * scsi target id value assigned to it will persist in case the
3477  * role changes back to include FCP Target. No changes in the scsi
3478  * midlayer will be invoked if the role changes (in the expectation
3479  * that the role will be resumed. If it doesn't normal error processing
3480  * will take place).
3481  *
3482  * Should not be called from interrupt context.
3483  *
3484  * Notes:
3485  *      This routine assumes no locks are held on entry.
3486  */
3487 void
3488 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3489 {
3490         struct Scsi_Host *shost = rport_to_shost(rport);
3491         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3492         unsigned long flags;
3493         int create = 0;
3494
3495         spin_lock_irqsave(shost->host_lock, flags);
3496         if (roles & FC_PORT_ROLE_FCP_TARGET) {
3497                 if (rport->scsi_target_id == -1) {
3498                         rport->scsi_target_id = fc_host->next_target_id++;
3499                         create = 1;
3500                 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3501                         create = 1;
3502         }
3503
3504         rport->roles = roles;
3505
3506         spin_unlock_irqrestore(shost->host_lock, flags);
3507
3508         if (create) {
3509                 /*
3510                  * There may have been a delete timer running on the
3511                  * port. Ensure that it is cancelled as we now know
3512                  * the port is an FCP Target.
3513                  * Note: we know the rport exists and is in an online
3514                  *  state as the LLDD would not have had an rport
3515                  *  reference to pass us.
3516                  *
3517                  * Take no action on the del_timer failure as the state
3518                  * machine state change will validate the
3519                  * transaction.
3520                  */
3521                 if (!cancel_delayed_work(&rport->fail_io_work))
3522                         fc_flush_devloss(shost);
3523                 if (!cancel_delayed_work(&rport->dev_loss_work))
3524                         fc_flush_devloss(shost);
3525
3526                 spin_lock_irqsave(shost->host_lock, flags);
3527                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3528                                   FC_RPORT_DEVLOSS_PENDING |
3529                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3530                 spin_unlock_irqrestore(shost->host_lock, flags);
3531
3532                 /* ensure any stgt delete functions are done */
3533                 fc_flush_work(shost);
3534
3535                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3536                 /* initiate a scan of the target */
3537                 spin_lock_irqsave(shost->host_lock, flags);
3538                 rport->flags |= FC_RPORT_SCAN_PENDING;
3539                 scsi_queue_work(shost, &rport->scan_work);
3540                 spin_unlock_irqrestore(shost->host_lock, flags);
3541         }
3542 }
3543 EXPORT_SYMBOL(fc_remote_port_rolechg);
3544
3545 /**
3546  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3547  * @work:       rport target that failed to reappear in the allotted time.
3548  *
3549  * Description: An attempt to delete a remote port blocks, and if it fails
3550  *              to return in the allotted time this gets called.
3551  */
3552 static void
3553 fc_timeout_deleted_rport(struct work_struct *work)
3554 {
3555         struct fc_rport *rport =
3556                 container_of(work, struct fc_rport, dev_loss_work.work);
3557         struct Scsi_Host *shost = rport_to_shost(rport);
3558         struct fc_internal *i = to_fc_internal(shost->transportt);
3559         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3560         unsigned long flags;
3561         int do_callback = 0;
3562
3563         spin_lock_irqsave(shost->host_lock, flags);
3564
3565         rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3566
3567         /*
3568          * If the port is ONLINE, then it came back. If it was a SCSI
3569          * target, validate it still is. If not, tear down the
3570          * scsi_target on it.
3571          */
3572         if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
3573                 (rport->port_state == FC_PORTSTATE_MARGINAL)) &&
3574             (rport->scsi_target_id != -1) &&
3575             !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3576                 dev_printk(KERN_ERR, &rport->dev,
3577                         "blocked FC remote port time out: no longer"
3578                         " a FCP target, removing starget\n");
3579                 spin_unlock_irqrestore(shost->host_lock, flags);
3580                 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3581                 fc_queue_work(shost, &rport->stgt_delete_work);
3582                 return;
3583         }
3584
3585         /* NOOP state - we're flushing workq's */
3586         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3587                 spin_unlock_irqrestore(shost->host_lock, flags);
3588                 dev_printk(KERN_ERR, &rport->dev,
3589                         "blocked FC remote port time out: leaving"
3590                         " rport%s alone\n",
3591                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3592                 return;
3593         }
3594
3595         if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3596             (rport->scsi_target_id == -1)) {
3597                 list_del(&rport->peers);
3598                 rport->port_state = FC_PORTSTATE_DELETED;
3599                 dev_printk(KERN_ERR, &rport->dev,
3600                         "blocked FC remote port time out: removing"
3601                         " rport%s\n",
3602                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3603                 fc_queue_work(shost, &rport->rport_delete_work);
3604                 spin_unlock_irqrestore(shost->host_lock, flags);
3605                 return;
3606         }
3607
3608         dev_printk(KERN_ERR, &rport->dev,
3609                 "blocked FC remote port time out: removing target and "
3610                 "saving binding\n");
3611
3612         list_move_tail(&rport->peers, &fc_host->rport_bindings);
3613
3614         /*
3615          * Note: We do not remove or clear the hostdata area. This allows
3616          *   host-specific target data to persist along with the
3617          *   scsi_target_id. It's up to the host to manage it's hostdata area.
3618          */
3619
3620         /*
3621          * Reinitialize port attributes that may change if the port comes back.
3622          */
3623         rport->maxframe_size = -1;
3624         rport->supported_classes = FC_COS_UNSPECIFIED;
3625         rport->roles = FC_PORT_ROLE_UNKNOWN;
3626         rport->port_state = FC_PORTSTATE_NOTPRESENT;
3627         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3628
3629         /*
3630          * Pre-emptively kill I/O rather than waiting for the work queue
3631          * item to teardown the starget. (FCOE libFC folks prefer this
3632          * and to have the rport_port_id still set when it's done).
3633          */
3634         spin_unlock_irqrestore(shost->host_lock, flags);
3635         fc_terminate_rport_io(rport);
3636
3637         spin_lock_irqsave(shost->host_lock, flags);
3638
3639         if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {     /* still missing */
3640
3641                 /* remove the identifiers that aren't used in the consisting binding */
3642                 switch (fc_host->tgtid_bind_type) {
3643                 case FC_TGTID_BIND_BY_WWPN:
3644                         rport->node_name = -1;
3645                         rport->port_id = -1;
3646                         break;
3647                 case FC_TGTID_BIND_BY_WWNN:
3648                         rport->port_name = -1;
3649                         rport->port_id = -1;
3650                         break;
3651                 case FC_TGTID_BIND_BY_ID:
3652                         rport->node_name = -1;
3653                         rport->port_name = -1;
3654                         break;
3655                 case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
3656                         break;
3657                 }
3658
3659                 /*
3660                  * As this only occurs if the remote port (scsi target)
3661                  * went away and didn't come back - we'll remove
3662                  * all attached scsi devices.
3663                  */
3664                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3665                 fc_queue_work(shost, &rport->stgt_delete_work);
3666
3667                 do_callback = 1;
3668         }
3669
3670         spin_unlock_irqrestore(shost->host_lock, flags);
3671
3672         /*
3673          * Notify the driver that the rport is now dead. The LLDD will
3674          * also guarantee that any communication to the rport is terminated
3675          *
3676          * Note: we set the CALLBK_DONE flag above to correspond
3677          */
3678         if (do_callback && i->f->dev_loss_tmo_callbk)
3679                 i->f->dev_loss_tmo_callbk(rport);
3680 }
3681
3682
3683 /**
3684  * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3685  * @work:       rport to terminate io on.
3686  *
3687  * Notes: Only requests the failure of the io, not that all are flushed
3688  *    prior to returning.
3689  */
3690 static void
3691 fc_timeout_fail_rport_io(struct work_struct *work)
3692 {
3693         struct fc_rport *rport =
3694                 container_of(work, struct fc_rport, fail_io_work.work);
3695
3696         if (rport->port_state != FC_PORTSTATE_BLOCKED)
3697                 return;
3698
3699         rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3700         fc_terminate_rport_io(rport);
3701 }
3702
3703 /**
3704  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3705  * @work:       remote port to be scanned.
3706  */
3707 static void
3708 fc_scsi_scan_rport(struct work_struct *work)
3709 {
3710         struct fc_rport *rport =
3711                 container_of(work, struct fc_rport, scan_work);
3712         struct Scsi_Host *shost = rport_to_shost(rport);
3713         struct fc_internal *i = to_fc_internal(shost->transportt);
3714         unsigned long flags;
3715
3716         if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
3717                 (rport->port_state == FC_PORTSTATE_MARGINAL)) &&
3718             (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3719             !(i->f->disable_target_scan)) {
3720                 scsi_scan_target(&rport->dev, rport->channel,
3721                                  rport->scsi_target_id, SCAN_WILD_CARD,
3722                                  SCSI_SCAN_RESCAN);
3723         }
3724
3725         spin_lock_irqsave(shost->host_lock, flags);
3726         rport->flags &= ~FC_RPORT_SCAN_PENDING;
3727         spin_unlock_irqrestore(shost->host_lock, flags);
3728 }
3729
3730 /**
3731  * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3732  * @rport: Remote port that scsi_eh is trying to recover.
3733  *
3734  * This routine can be called from a FC LLD scsi_eh callback. It
3735  * blocks the scsi_eh thread until the fc_rport leaves the
3736  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3737  * necessary to avoid the scsi_eh failing recovery actions for blocked
3738  * rports which would lead to offlined SCSI devices.
3739  *
3740  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3741  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3742  *          passed back to scsi_eh.
3743  */
3744 int fc_block_rport(struct fc_rport *rport)
3745 {
3746         struct Scsi_Host *shost = rport_to_shost(rport);
3747         unsigned long flags;
3748
3749         spin_lock_irqsave(shost->host_lock, flags);
3750         while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3751                !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3752                 spin_unlock_irqrestore(shost->host_lock, flags);
3753                 msleep(1000);
3754                 spin_lock_irqsave(shost->host_lock, flags);
3755         }
3756         spin_unlock_irqrestore(shost->host_lock, flags);
3757
3758         if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3759                 return FAST_IO_FAIL;
3760
3761         return 0;
3762 }
3763 EXPORT_SYMBOL(fc_block_rport);
3764
3765 /**
3766  * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3767  * @cmnd: SCSI command that scsi_eh is trying to recover
3768  *
3769  * This routine can be called from a FC LLD scsi_eh callback. It
3770  * blocks the scsi_eh thread until the fc_rport leaves the
3771  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3772  * necessary to avoid the scsi_eh failing recovery actions for blocked
3773  * rports which would lead to offlined SCSI devices.
3774  *
3775  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3776  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3777  *          passed back to scsi_eh.
3778  */
3779 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3780 {
3781         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3782
3783         if (WARN_ON_ONCE(!rport))
3784                 return FAST_IO_FAIL;
3785
3786         return fc_block_rport(rport);
3787 }
3788 EXPORT_SYMBOL(fc_block_scsi_eh);
3789
3790 /*
3791  * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not
3792  * @scmd:        The SCSI command to be checked
3793  *
3794  * This checks the rport state to decide if a cmd is
3795  * retryable.
3796  *
3797  * Returns: true if the rport state is not in marginal state.
3798  */
3799 bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd)
3800 {
3801         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
3802
3803         if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
3804                 (scsi_cmd_to_rq(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT)) {
3805                 set_host_byte(scmd, DID_TRANSPORT_MARGINAL);
3806                 return false;
3807         }
3808         return true;
3809 }
3810 EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd);
3811
3812 /**
3813  * fc_vport_setup - allocates and creates a FC virtual port.
3814  * @shost:      scsi host the virtual port is connected to.
3815  * @channel:    Channel on shost port connected to.
3816  * @pdev:       parent device for vport
3817  * @ids:        The world wide names, FC4 port roles, etc for
3818  *              the virtual port.
3819  * @ret_vport:  The pointer to the created vport.
3820  *
3821  * Allocates and creates the vport structure, calls the parent host
3822  * to instantiate the vport, this completes w/ class and sysfs creation.
3823  *
3824  * Notes:
3825  *      This routine assumes no locks are held on entry.
3826  */
3827 static int
3828 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3829         struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
3830 {
3831         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3832         struct fc_internal *fci = to_fc_internal(shost->transportt);
3833         struct fc_vport *vport;
3834         struct device *dev;
3835         unsigned long flags;
3836         size_t size;
3837         int error;
3838
3839         *ret_vport = NULL;
3840
3841         if ( ! fci->f->vport_create)
3842                 return -ENOENT;
3843
3844         size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3845         vport = kzalloc(size, GFP_KERNEL);
3846         if (unlikely(!vport)) {
3847                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3848                 return -ENOMEM;
3849         }
3850
3851         vport->vport_state = FC_VPORT_UNKNOWN;
3852         vport->vport_last_state = FC_VPORT_UNKNOWN;
3853         vport->node_name = ids->node_name;
3854         vport->port_name = ids->port_name;
3855         vport->roles = ids->roles;
3856         vport->vport_type = ids->vport_type;
3857         if (fci->f->dd_fcvport_size)
3858                 vport->dd_data = &vport[1];
3859         vport->shost = shost;
3860         vport->channel = channel;
3861         vport->flags = FC_VPORT_CREATING;
3862         INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3863
3864         spin_lock_irqsave(shost->host_lock, flags);
3865
3866         if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3867                 spin_unlock_irqrestore(shost->host_lock, flags);
3868                 kfree(vport);
3869                 return -ENOSPC;
3870         }
3871         fc_host->npiv_vports_inuse++;
3872         vport->number = fc_host->next_vport_number++;
3873         list_add_tail(&vport->peers, &fc_host->vports);
3874         scsi_host_get(shost);                   /* for fc_host->vport list */
3875
3876         spin_unlock_irqrestore(shost->host_lock, flags);
3877
3878         dev = &vport->dev;
3879         device_initialize(dev);                 /* takes self reference */
3880         dev->parent = get_device(pdev);         /* takes parent reference */
3881         dev->release = fc_vport_dev_release;
3882         dev_set_name(dev, "vport-%d:%d-%d",
3883                      shost->host_no, channel, vport->number);
3884         transport_setup_device(dev);
3885
3886         error = device_add(dev);
3887         if (error) {
3888                 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3889                 goto delete_vport;
3890         }
3891         transport_add_device(dev);
3892         transport_configure_device(dev);
3893
3894         error = fci->f->vport_create(vport, ids->disable);
3895         if (error) {
3896                 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3897                 goto delete_vport_all;
3898         }
3899
3900         /*
3901          * if the parent isn't the physical adapter's Scsi_Host, ensure
3902          * the Scsi_Host at least contains a symlink to the vport.
3903          */
3904         if (pdev != &shost->shost_gendev) {
3905                 error = sysfs_create_link(&shost->shost_gendev.kobj,
3906                                  &dev->kobj, dev_name(dev));
3907                 if (error)
3908                         printk(KERN_ERR
3909                                 "%s: Cannot create vport symlinks for "
3910                                 "%s, err=%d\n",
3911                                 __func__, dev_name(dev), error);
3912         }
3913         spin_lock_irqsave(shost->host_lock, flags);
3914         vport->flags &= ~FC_VPORT_CREATING;
3915         spin_unlock_irqrestore(shost->host_lock, flags);
3916
3917         dev_printk(KERN_NOTICE, pdev,
3918                         "%s created via shost%d channel %d\n", dev_name(dev),
3919                         shost->host_no, channel);
3920
3921         *ret_vport = vport;
3922
3923         return 0;
3924
3925 delete_vport_all:
3926         transport_remove_device(dev);
3927         device_del(dev);
3928 delete_vport:
3929         transport_destroy_device(dev);
3930         spin_lock_irqsave(shost->host_lock, flags);
3931         list_del(&vport->peers);
3932         scsi_host_put(shost);                   /* for fc_host->vport list */
3933         fc_host->npiv_vports_inuse--;
3934         spin_unlock_irqrestore(shost->host_lock, flags);
3935         put_device(dev->parent);
3936         kfree(vport);
3937
3938         return error;
3939 }
3940
3941 /**
3942  * fc_vport_create - Admin App or LLDD requests creation of a vport
3943  * @shost:      scsi host the virtual port is connected to.
3944  * @channel:    channel on shost port connected to.
3945  * @ids:        The world wide names, FC4 port roles, etc for
3946  *              the virtual port.
3947  *
3948  * Notes:
3949  *      This routine assumes no locks are held on entry.
3950  */
3951 struct fc_vport *
3952 fc_vport_create(struct Scsi_Host *shost, int channel,
3953         struct fc_vport_identifiers *ids)
3954 {
3955         int stat;
3956         struct fc_vport *vport;
3957
3958         stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3959                  ids, &vport);
3960         return stat ? NULL : vport;
3961 }
3962 EXPORT_SYMBOL(fc_vport_create);
3963
3964 /**
3965  * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3966  * @vport:      fc_vport to be terminated
3967  *
3968  * Calls the LLDD vport_delete() function, then deallocates and removes
3969  * the vport from the shost and object tree.
3970  *
3971  * Notes:
3972  *      This routine assumes no locks are held on entry.
3973  */
3974 int
3975 fc_vport_terminate(struct fc_vport *vport)
3976 {
3977         struct Scsi_Host *shost = vport_to_shost(vport);
3978         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3979         struct fc_internal *i = to_fc_internal(shost->transportt);
3980         struct device *dev = &vport->dev;
3981         unsigned long flags;
3982         int stat;
3983
3984         if (i->f->vport_delete)
3985                 stat = i->f->vport_delete(vport);
3986         else
3987                 stat = -ENOENT;
3988
3989         spin_lock_irqsave(shost->host_lock, flags);
3990         vport->flags &= ~FC_VPORT_DELETING;
3991         if (!stat) {
3992                 vport->flags |= FC_VPORT_DELETED;
3993                 list_del(&vport->peers);
3994                 fc_host->npiv_vports_inuse--;
3995                 scsi_host_put(shost);           /* for fc_host->vport list */
3996         }
3997         spin_unlock_irqrestore(shost->host_lock, flags);
3998
3999         if (stat)
4000                 return stat;
4001
4002         if (dev->parent != &shost->shost_gendev)
4003                 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
4004         transport_remove_device(dev);
4005         device_del(dev);
4006         transport_destroy_device(dev);
4007
4008         /*
4009          * Removing our self-reference should mean our
4010          * release function gets called, which will drop the remaining
4011          * parent reference and free the data structure.
4012          */
4013         put_device(dev);                        /* for self-reference */
4014
4015         return 0; /* SUCCESS */
4016 }
4017 EXPORT_SYMBOL(fc_vport_terminate);
4018
4019 /**
4020  * fc_vport_sched_delete - workq-based delete request for a vport
4021  * @work:       vport to be deleted.
4022  */
4023 static void
4024 fc_vport_sched_delete(struct work_struct *work)
4025 {
4026         struct fc_vport *vport =
4027                 container_of(work, struct fc_vport, vport_delete_work);
4028         int stat;
4029
4030         stat = fc_vport_terminate(vport);
4031         if (stat)
4032                 dev_printk(KERN_ERR, vport->dev.parent,
4033                         "%s: %s could not be deleted created via "
4034                         "shost%d channel %d - error %d\n", __func__,
4035                         dev_name(&vport->dev), vport->shost->host_no,
4036                         vport->channel, stat);
4037 }
4038
4039
4040 /*
4041  * BSG support
4042  */
4043
4044 /**
4045  * fc_bsg_job_timeout - handler for when a bsg request timesout
4046  * @req:        request that timed out
4047  */
4048 static enum blk_eh_timer_return
4049 fc_bsg_job_timeout(struct request *req)
4050 {
4051         struct bsg_job *job = blk_mq_rq_to_pdu(req);
4052         struct Scsi_Host *shost = fc_bsg_to_shost(job);
4053         struct fc_rport *rport = fc_bsg_to_rport(job);
4054         struct fc_internal *i = to_fc_internal(shost->transportt);
4055         int err = 0, inflight = 0;
4056
4057         if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
4058                 return BLK_EH_RESET_TIMER;
4059
4060         inflight = bsg_job_get(job);
4061
4062         if (inflight && i->f->bsg_timeout) {
4063                 /* call LLDD to abort the i/o as it has timed out */
4064                 err = i->f->bsg_timeout(job);
4065                 if (err == -EAGAIN) {
4066                         bsg_job_put(job);
4067                         return BLK_EH_RESET_TIMER;
4068                 } else if (err)
4069                         printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
4070                                 "abort failed with status %d\n", err);
4071         }
4072
4073         /* the blk_end_sync_io() doesn't check the error */
4074         if (inflight)
4075                 blk_mq_end_request(req, BLK_STS_IOERR);
4076         return BLK_EH_DONE;
4077 }
4078
4079 /**
4080  * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
4081  * @shost:      scsi host rport attached to
4082  * @job:        bsg job to be processed
4083  */
4084 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4085 {
4086         struct fc_internal *i = to_fc_internal(shost->transportt);
4087         struct fc_bsg_request *bsg_request = job->request;
4088         struct fc_bsg_reply *bsg_reply = job->reply;
4089         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
4090         int ret;
4091
4092         /* check if we really have all the request data needed */
4093         if (job->request_len < cmdlen) {
4094                 ret = -ENOMSG;
4095                 goto fail_host_msg;
4096         }
4097
4098         /* Validate the host command */
4099         switch (bsg_request->msgcode) {
4100         case FC_BSG_HST_ADD_RPORT:
4101                 cmdlen += sizeof(struct fc_bsg_host_add_rport);
4102                 break;
4103
4104         case FC_BSG_HST_DEL_RPORT:
4105                 cmdlen += sizeof(struct fc_bsg_host_del_rport);
4106                 break;
4107
4108         case FC_BSG_HST_ELS_NOLOGIN:
4109                 cmdlen += sizeof(struct fc_bsg_host_els);
4110                 /* there better be a xmt and rcv payloads */
4111                 if ((!job->request_payload.payload_len) ||
4112                     (!job->reply_payload.payload_len)) {
4113                         ret = -EINVAL;
4114                         goto fail_host_msg;
4115                 }
4116                 break;
4117
4118         case FC_BSG_HST_CT:
4119                 cmdlen += sizeof(struct fc_bsg_host_ct);
4120                 /* there better be xmt and rcv payloads */
4121                 if ((!job->request_payload.payload_len) ||
4122                     (!job->reply_payload.payload_len)) {
4123                         ret = -EINVAL;
4124                         goto fail_host_msg;
4125                 }
4126                 break;
4127
4128         case FC_BSG_HST_VENDOR:
4129                 cmdlen += sizeof(struct fc_bsg_host_vendor);
4130                 if ((shost->hostt->vendor_id == 0L) ||
4131                     (bsg_request->rqst_data.h_vendor.vendor_id !=
4132                         shost->hostt->vendor_id)) {
4133                         ret = -ESRCH;
4134                         goto fail_host_msg;
4135                 }
4136                 break;
4137
4138         default:
4139                 ret = -EBADR;
4140                 goto fail_host_msg;
4141         }
4142
4143         ret = i->f->bsg_request(job);
4144         if (!ret)
4145                 return 0;
4146
4147 fail_host_msg:
4148         /* return the errno failure code as the only status */
4149         BUG_ON(job->reply_len < sizeof(uint32_t));
4150         bsg_reply->reply_payload_rcv_len = 0;
4151         bsg_reply->result = ret;
4152         job->reply_len = sizeof(uint32_t);
4153         bsg_job_done(job, bsg_reply->result,
4154                        bsg_reply->reply_payload_rcv_len);
4155         return 0;
4156 }
4157
4158
4159 /*
4160  * fc_bsg_goose_queue - restart rport queue in case it was stopped
4161  * @rport:      rport to be restarted
4162  */
4163 static void
4164 fc_bsg_goose_queue(struct fc_rport *rport)
4165 {
4166         struct request_queue *q = rport->rqst_q;
4167
4168         if (q)
4169                 blk_mq_run_hw_queues(q, true);
4170 }
4171
4172 /**
4173  * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
4174  * @shost:      scsi host rport attached to
4175  * @job:        bsg job to be processed
4176  */
4177 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4178 {
4179         struct fc_internal *i = to_fc_internal(shost->transportt);
4180         struct fc_bsg_request *bsg_request = job->request;
4181         struct fc_bsg_reply *bsg_reply = job->reply;
4182         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
4183         int ret;
4184
4185         /* check if we really have all the request data needed */
4186         if (job->request_len < cmdlen) {
4187                 ret = -ENOMSG;
4188                 goto fail_rport_msg;
4189         }
4190
4191         /* Validate the rport command */
4192         switch (bsg_request->msgcode) {
4193         case FC_BSG_RPT_ELS:
4194                 cmdlen += sizeof(struct fc_bsg_rport_els);
4195                 goto check_bidi;
4196
4197         case FC_BSG_RPT_CT:
4198                 cmdlen += sizeof(struct fc_bsg_rport_ct);
4199 check_bidi:
4200                 /* there better be xmt and rcv payloads */
4201                 if ((!job->request_payload.payload_len) ||
4202                     (!job->reply_payload.payload_len)) {
4203                         ret = -EINVAL;
4204                         goto fail_rport_msg;
4205                 }
4206                 break;
4207         default:
4208                 ret = -EBADR;
4209                 goto fail_rport_msg;
4210         }
4211
4212         ret = i->f->bsg_request(job);
4213         if (!ret)
4214                 return 0;
4215
4216 fail_rport_msg:
4217         /* return the errno failure code as the only status */
4218         BUG_ON(job->reply_len < sizeof(uint32_t));
4219         bsg_reply->reply_payload_rcv_len = 0;
4220         bsg_reply->result = ret;
4221         job->reply_len = sizeof(uint32_t);
4222         bsg_job_done(job, bsg_reply->result,
4223                        bsg_reply->reply_payload_rcv_len);
4224         return 0;
4225 }
4226
4227 static int fc_bsg_dispatch(struct bsg_job *job)
4228 {
4229         struct Scsi_Host *shost = fc_bsg_to_shost(job);
4230
4231         if (scsi_is_fc_rport(job->dev))
4232                 return fc_bsg_rport_dispatch(shost, job);
4233         else
4234                 return fc_bsg_host_dispatch(shost, job);
4235 }
4236
4237 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
4238 {
4239         if (rport->port_state == FC_PORTSTATE_BLOCKED &&
4240             !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
4241                 return BLK_STS_RESOURCE;
4242
4243         if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
4244                 (rport->port_state != FC_PORTSTATE_MARGINAL))
4245                 return BLK_STS_IOERR;
4246
4247         return BLK_STS_OK;
4248 }
4249
4250
4251 static int fc_bsg_dispatch_prep(struct bsg_job *job)
4252 {
4253         struct fc_rport *rport = fc_bsg_to_rport(job);
4254         blk_status_t ret;
4255
4256         ret = fc_bsg_rport_prep(rport);
4257         switch (ret) {
4258         case BLK_STS_OK:
4259                 break;
4260         case BLK_STS_RESOURCE:
4261                 return -EAGAIN;
4262         default:
4263                 return -EIO;
4264         }
4265
4266         return fc_bsg_dispatch(job);
4267 }
4268
4269 /**
4270  * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4271  * @shost:      shost for fc_host
4272  * @fc_host:    fc_host adding the structures to
4273  */
4274 static int
4275 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4276 {
4277         struct device *dev = &shost->shost_gendev;
4278         struct fc_internal *i = to_fc_internal(shost->transportt);
4279         struct request_queue *q;
4280         char bsg_name[20];
4281
4282         fc_host->rqst_q = NULL;
4283
4284         if (!i->f->bsg_request)
4285                 return -ENOTSUPP;
4286
4287         snprintf(bsg_name, sizeof(bsg_name),
4288                  "fc_host%d", shost->host_no);
4289
4290         q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout,
4291                                 i->f->dd_bsg_size);
4292         if (IS_ERR(q)) {
4293                 dev_err(dev,
4294                         "fc_host%d: bsg interface failed to initialize - setup queue\n",
4295                         shost->host_no);
4296                 return PTR_ERR(q);
4297         }
4298         __scsi_init_queue(shost, q);
4299         blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4300         fc_host->rqst_q = q;
4301         return 0;
4302 }
4303
4304 /**
4305  * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4306  * @shost:      shost that rport is attached to
4307  * @rport:      rport that the bsg hooks are being attached to
4308  */
4309 static int
4310 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4311 {
4312         struct device *dev = &rport->dev;
4313         struct fc_internal *i = to_fc_internal(shost->transportt);
4314         struct request_queue *q;
4315
4316         rport->rqst_q = NULL;
4317
4318         if (!i->f->bsg_request)
4319                 return -ENOTSUPP;
4320
4321         q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep,
4322                                 fc_bsg_job_timeout, i->f->dd_bsg_size);
4323         if (IS_ERR(q)) {
4324                 dev_err(dev, "failed to setup bsg queue\n");
4325                 return PTR_ERR(q);
4326         }
4327         __scsi_init_queue(shost, q);
4328         blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4329         rport->rqst_q = q;
4330         return 0;
4331 }
4332
4333
4334 /**
4335  * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4336  * @q:  the request_queue that is to be torn down.
4337  *
4338  * Notes:
4339  *   Before unregistering the queue empty any requests that are blocked
4340  *
4341  *
4342  */
4343 static void
4344 fc_bsg_remove(struct request_queue *q)
4345 {
4346         bsg_remove_queue(q);
4347 }
4348
4349
4350 /* Original Author:  Martin Hicks */
4351 MODULE_AUTHOR("James Smart");
4352 MODULE_DESCRIPTION("FC Transport Attributes");
4353 MODULE_LICENSE("GPL");
4354
4355 module_init(fc_transport_init);
4356 module_exit(fc_transport_exit);