drivers/scsi/scsi_transport_fc.c

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