drivers/scsi/scsi_transport_iscsi.c

   1 /*
   2  * iSCSI transport class definitions
   3  *
   4  * Copyright (C) IBM Corporation, 2004
   5  * Copyright (C) Mike Christie, 2004 - 2005
   6  * Copyright (C) Dmitry Yusupov, 2004 - 2005
   7  * Copyright (C) Alex Aizman, 2004 - 2005
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  */
  23 #include <linux/module.h>
  24 #include <linux/mutex.h>
  25 #include <linux/slab.h>
  26 #include <linux/bsg-lib.h>
  27 #include <linux/idr.h>
  28 #include <net/tcp.h>
  29 #include <scsi/scsi.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_device.h>
  32 #include <scsi/scsi_transport.h>
  33 #include <scsi/scsi_transport_iscsi.h>
  34 #include <scsi/iscsi_if.h>
  35 #include <scsi/scsi_cmnd.h>
  36 #include <scsi/scsi_bsg_iscsi.h>
  37
  38 #define ISCSI_TRANSPORT_VERSION "2.0-870"
  39
  40 static int dbg_session;
  41 module_param_named(debug_session, dbg_session, int,
  42                    S_IRUGO | S_IWUSR);
  43 MODULE_PARM_DESC(debug_session,
  44                  "Turn on debugging for sessions in scsi_transport_iscsi "
  45                  "module. Set to 1 to turn on, and zero to turn off. Default "
  46                  "is off.");
  47
  48 static int dbg_conn;
  49 module_param_named(debug_conn, dbg_conn, int,
  50                    S_IRUGO | S_IWUSR);
  51 MODULE_PARM_DESC(debug_conn,
  52                  "Turn on debugging for connections in scsi_transport_iscsi "
  53                  "module. Set to 1 to turn on, and zero to turn off. Default "
  54                  "is off.");
  55
  56 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)              \
  57         do {                                                            \
  58                 if (dbg_session)                                        \
  59                         iscsi_cls_session_printk(KERN_INFO, _session,   \
  60                                                  "%s: " dbg_fmt,        \
  61                                                  __func__, ##arg);      \
  62         } while (0);
  63
  64 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)                    \
  65         do {                                                            \
  66                 if (dbg_conn)                                           \
  67                         iscsi_cls_conn_printk(KERN_INFO, _conn,         \
  68                                               "%s: " dbg_fmt,           \
  69                                               __func__, ##arg); \
  70         } while (0);
  71
  72 struct iscsi_internal {
  73         struct scsi_transport_template t;
  74         struct iscsi_transport *iscsi_transport;
  75         struct list_head list;
  76         struct device dev;
  77
  78         struct transport_container conn_cont;
  79         struct transport_container session_cont;
  80 };
  81
  82 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
  83 static struct workqueue_struct *iscsi_eh_timer_workq;
  84
  85 static DEFINE_IDA(iscsi_sess_ida);
  86 /*
  87  * list of registered transports and lock that must
  88  * be held while accessing list. The iscsi_transport_lock must
  89  * be acquired after the rx_queue_mutex.
  90  */
  91 static LIST_HEAD(iscsi_transports);
  92 static DEFINE_SPINLOCK(iscsi_transport_lock);
  93
  94 #define to_iscsi_internal(tmpl) \
  95         container_of(tmpl, struct iscsi_internal, t)
  96
  97 #define dev_to_iscsi_internal(_dev) \
  98         container_of(_dev, struct iscsi_internal, dev)
  99
 100 static void iscsi_transport_release(struct device *dev)
 101 {
 102         struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
 103         kfree(priv);
 104 }
 105
 106 /*
 107  * iscsi_transport_class represents the iscsi_transports that are
 108  * registered.
 109  */
 110 static struct class iscsi_transport_class = {
 111         .name = "iscsi_transport",
 112         .dev_release = iscsi_transport_release,
 113 };
 114
 115 static ssize_t
 116 show_transport_handle(struct device *dev, struct device_attribute *attr,
 117                       char *buf)
 118 {
 119         struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
 120         return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
 121 }
 122 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
 123
 124 #define show_transport_attr(name, format)                               \
 125 static ssize_t                                                          \
 126 show_transport_##name(struct device *dev,                               \
 127                       struct device_attribute *attr,char *buf)          \
 128 {                                                                       \
 129         struct iscsi_internal *priv = dev_to_iscsi_internal(dev);       \
 130         return sprintf(buf, format"\n", priv->iscsi_transport->name);   \
 131 }                                                                       \
 132 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
 133
 134 show_transport_attr(caps, "0x%x");
 135
 136 static struct attribute *iscsi_transport_attrs[] = {
 137         &dev_attr_handle.attr,
 138         &dev_attr_caps.attr,
 139         NULL,
 140 };
 141
 142 static struct attribute_group iscsi_transport_group = {
 143         .attrs = iscsi_transport_attrs,
 144 };
 145
 146 /*
 147  * iSCSI endpoint attrs
 148  */
 149 #define iscsi_dev_to_endpoint(_dev) \
 150         container_of(_dev, struct iscsi_endpoint, dev)
 151
 152 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store)    \
 153 struct device_attribute dev_attr_##_prefix##_##_name =  \
 154         __ATTR(_name,_mode,_show,_store)
 155
 156 static void iscsi_endpoint_release(struct device *dev)
 157 {
 158         struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
 159         kfree(ep);
 160 }
 161
 162 static struct class iscsi_endpoint_class = {
 163         .name = "iscsi_endpoint",
 164         .dev_release = iscsi_endpoint_release,
 165 };
 166
 167 static ssize_t
 168 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
 169 {
 170         struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
 171         return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
 172 }
 173 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
 174
 175 static struct attribute *iscsi_endpoint_attrs[] = {
 176         &dev_attr_ep_handle.attr,
 177         NULL,
 178 };
 179
 180 static struct attribute_group iscsi_endpoint_group = {
 181         .attrs = iscsi_endpoint_attrs,
 182 };
 183
 184 #define ISCSI_MAX_EPID -1
 185
 186 static int iscsi_match_epid(struct device *dev, const void *data)
 187 {
 188         struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
 189         const uint64_t *epid = data;
 190
 191         return *epid == ep->id;
 192 }
 193
 194 struct iscsi_endpoint *
 195 iscsi_create_endpoint(int dd_size)
 196 {
 197         struct device *dev;
 198         struct iscsi_endpoint *ep;
 199         uint64_t id;
 200         int err;
 201
 202         for (id = 1; id < ISCSI_MAX_EPID; id++) {
 203                 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
 204                                         iscsi_match_epid);
 205                 if (!dev)
 206                         break;
 207                 else
 208                         put_device(dev);
 209         }
 210         if (id == ISCSI_MAX_EPID) {
 211                 printk(KERN_ERR "Too many connections. Max supported %u\n",
 212                        ISCSI_MAX_EPID - 1);
 213                 return NULL;
 214         }
 215
 216         ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
 217         if (!ep)
 218                 return NULL;
 219
 220         ep->id = id;
 221         ep->dev.class = &iscsi_endpoint_class;
 222         dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
 223         err = device_register(&ep->dev);
 224         if (err)
 225                 goto free_ep;
 226
 227         err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
 228         if (err)
 229                 goto unregister_dev;
 230
 231         if (dd_size)
 232                 ep->dd_data = &ep[1];
 233         return ep;
 234
 235 unregister_dev:
 236         device_unregister(&ep->dev);
 237         return NULL;
 238
 239 free_ep:
 240         kfree(ep);
 241         return NULL;
 242 }
 243 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
 244
 245 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
 246 {
 247         sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
 248         device_unregister(&ep->dev);
 249 }
 250 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
 251
 252 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
 253 {
 254         struct iscsi_endpoint *ep;
 255         struct device *dev;
 256
 257         dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
 258                                 iscsi_match_epid);
 259         if (!dev)
 260                 return NULL;
 261
 262         ep = iscsi_dev_to_endpoint(dev);
 263         /*
 264          * we can drop this now because the interface will prevent
 265          * removals and lookups from racing.
 266          */
 267         put_device(dev);
 268         return ep;
 269 }
 270 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
 271
 272 /*
 273  * Interface to display network param to sysfs
 274  */
 275
 276 static void iscsi_iface_release(struct device *dev)
 277 {
 278         struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
 279         struct device *parent = iface->dev.parent;
 280
 281         kfree(iface);
 282         put_device(parent);
 283 }
 284
 285
 286 static struct class iscsi_iface_class = {
 287         .name = "iscsi_iface",
 288         .dev_release = iscsi_iface_release,
 289 };
 290
 291 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store)  \
 292 struct device_attribute dev_attr_##_prefix##_##_name =          \
 293         __ATTR(_name, _mode, _show, _store)
 294
 295 /* iface attrs show */
 296 #define iscsi_iface_attr_show(type, name, param_type, param)            \
 297 static ssize_t                                                          \
 298 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
 299                      char *buf)                                         \
 300 {                                                                       \
 301         struct iscsi_iface *iface = iscsi_dev_to_iface(dev);            \
 302         struct iscsi_transport *t = iface->transport;                   \
 303         return t->get_iface_param(iface, param_type, param, buf);       \
 304 }                                                                       \
 305
 306 #define iscsi_iface_net_attr(type, name, param)                         \
 307         iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param)       \
 308 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
 309
 310 #define iscsi_iface_attr(type, name, param)                             \
 311         iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param)     \
 312 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
 313
 314 /* generic read only ipv4 attribute */
 315 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
 316 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
 317 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
 318 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
 319 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
 320                      ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
 321 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
 322                      ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
 323 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
 324 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
 325 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
 326                      ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
 327 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
 328                      ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
 329 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
 330                      ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
 331 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
 332                      ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
 333 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
 334                      ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
 335 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
 336                      ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
 337 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
 338                      ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
 339 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
 340                      ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
 341 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
 342                      ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
 343 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
 344
 345 /* generic read only ipv6 attribute */
 346 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
 347 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
 348                      ISCSI_NET_PARAM_IPV6_LINKLOCAL);
 349 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
 350 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
 351                      ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
 352 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
 353                      ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
 354 iscsi_iface_net_attr(ipv6_iface, link_local_state,
 355                      ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
 356 iscsi_iface_net_attr(ipv6_iface, router_state,
 357                      ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
 358 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
 359                      ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
 360 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
 361 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
 362 iscsi_iface_net_attr(ipv6_iface, traffic_class,
 363                      ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
 364 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
 365 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
 366                      ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
 367 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
 368                      ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
 369 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
 370                      ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
 371 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
 372                      ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
 373 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
 374                      ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
 375
 376 /* common read only iface attribute */
 377 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
 378 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
 379 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
 380 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
 381 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
 382 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
 383 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
 384 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
 385 iscsi_iface_net_attr(iface, tcp_nagle_disable,
 386                      ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
 387 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
 388 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
 389 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
 390 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
 391 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
 392 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
 393
 394 /* common iscsi specific settings attributes */
 395 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
 396 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
 397 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
 398 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
 399 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
 400 iscsi_iface_attr(iface, data_seq_in_order,
 401                  ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
 402 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
 403 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
 404 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
 405 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
 406 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
 407 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
 408 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
 409 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
 410 iscsi_iface_attr(iface, discovery_auth_optional,
 411                  ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
 412 iscsi_iface_attr(iface, discovery_logout,
 413                  ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
 414 iscsi_iface_attr(iface, strict_login_comp_en,
 415                  ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
 416 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
 417
 418 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
 419                                           struct attribute *attr, int i)
 420 {
 421         struct device *dev = container_of(kobj, struct device, kobj);
 422         struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
 423         struct iscsi_transport *t = iface->transport;
 424         int param;
 425         int param_type;
 426
 427         if (attr == &dev_attr_iface_enabled.attr)
 428                 param = ISCSI_NET_PARAM_IFACE_ENABLE;
 429         else if (attr == &dev_attr_iface_vlan_id.attr)
 430                 param = ISCSI_NET_PARAM_VLAN_ID;
 431         else if (attr == &dev_attr_iface_vlan_priority.attr)
 432                 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
 433         else if (attr == &dev_attr_iface_vlan_enabled.attr)
 434                 param = ISCSI_NET_PARAM_VLAN_ENABLED;
 435         else if (attr == &dev_attr_iface_mtu.attr)
 436                 param = ISCSI_NET_PARAM_MTU;
 437         else if (attr == &dev_attr_iface_port.attr)
 438                 param = ISCSI_NET_PARAM_PORT;
 439         else if (attr == &dev_attr_iface_ipaddress_state.attr)
 440                 param = ISCSI_NET_PARAM_IPADDR_STATE;
 441         else if (attr == &dev_attr_iface_delayed_ack_en.attr)
 442                 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
 443         else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
 444                 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
 445         else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
 446                 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
 447         else if (attr == &dev_attr_iface_tcp_wsf.attr)
 448                 param = ISCSI_NET_PARAM_TCP_WSF;
 449         else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
 450                 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
 451         else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
 452                 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
 453         else if (attr == &dev_attr_iface_cache_id.attr)
 454                 param = ISCSI_NET_PARAM_CACHE_ID;
 455         else if (attr == &dev_attr_iface_redirect_en.attr)
 456                 param = ISCSI_NET_PARAM_REDIRECT_EN;
 457         else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
 458                 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
 459         else if (attr == &dev_attr_iface_header_digest.attr)
 460                 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
 461         else if (attr == &dev_attr_iface_data_digest.attr)
 462                 param = ISCSI_IFACE_PARAM_DATADGST_EN;
 463         else if (attr == &dev_attr_iface_immediate_data.attr)
 464                 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
 465         else if (attr == &dev_attr_iface_initial_r2t.attr)
 466                 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
 467         else if (attr == &dev_attr_iface_data_seq_in_order.attr)
 468                 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
 469         else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
 470                 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
 471         else if (attr == &dev_attr_iface_erl.attr)
 472                 param = ISCSI_IFACE_PARAM_ERL;
 473         else if (attr == &dev_attr_iface_max_recv_dlength.attr)
 474                 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
 475         else if (attr == &dev_attr_iface_first_burst_len.attr)
 476                 param = ISCSI_IFACE_PARAM_FIRST_BURST;
 477         else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
 478                 param = ISCSI_IFACE_PARAM_MAX_R2T;
 479         else if (attr == &dev_attr_iface_max_burst_len.attr)
 480                 param = ISCSI_IFACE_PARAM_MAX_BURST;
 481         else if (attr == &dev_attr_iface_chap_auth.attr)
 482                 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
 483         else if (attr == &dev_attr_iface_bidi_chap.attr)
 484                 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
 485         else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
 486                 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
 487         else if (attr == &dev_attr_iface_discovery_logout.attr)
 488                 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
 489         else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
 490                 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
 491         else if (attr == &dev_attr_iface_initiator_name.attr)
 492                 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
 493         else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
 494                 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
 495                         param = ISCSI_NET_PARAM_IPV4_ADDR;
 496                 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
 497                         param = ISCSI_NET_PARAM_IPV4_GW;
 498                 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
 499                         param = ISCSI_NET_PARAM_IPV4_SUBNET;
 500                 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
 501                         param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
 502                 else if (attr ==
 503                          &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
 504                         param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
 505                 else if (attr ==
 506                          &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
 507                         param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
 508                 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
 509                         param = ISCSI_NET_PARAM_IPV4_TOS_EN;
 510                 else if (attr == &dev_attr_ipv4_iface_tos.attr)
 511                         param = ISCSI_NET_PARAM_IPV4_TOS;
 512                 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
 513                         param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
 514                 else if (attr ==
 515                          &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
 516                         param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
 517                 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
 518                         param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
 519                 else if (attr ==
 520                          &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
 521                         param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
 522                 else if (attr ==
 523                          &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
 524                         param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
 525                 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
 526                         param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
 527                 else if (attr ==
 528                          &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
 529                         param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
 530                 else if (attr ==
 531                          &dev_attr_ipv4_iface_fragment_disable.attr)
 532                         param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
 533                 else if (attr ==
 534                          &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
 535                         param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
 536                 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
 537                         param = ISCSI_NET_PARAM_IPV4_TTL;
 538                 else
 539                         return 0;
 540         } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
 541                 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
 542                         param = ISCSI_NET_PARAM_IPV6_ADDR;
 543                 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
 544                         param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
 545                 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
 546                         param = ISCSI_NET_PARAM_IPV6_ROUTER;
 547                 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
 548                         param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
 549                 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
 550                         param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
 551                 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
 552                         param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
 553                 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
 554                         param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
 555                 else if (attr ==
 556                          &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
 557                         param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
 558                 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
 559                         param = ISCSI_NET_PARAM_IPV6_MLD_EN;
 560                 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
 561                         param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
 562                 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
 563                         param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
 564                 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
 565                         param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
 566                 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
 567                         param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
 568                 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
 569                         param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
 570                 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
 571                         param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
 572                 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
 573                         param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
 574                 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
 575                         param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
 576                 else
 577                         return 0;
 578         } else {
 579                 WARN_ONCE(1, "Invalid iface attr");
 580                 return 0;
 581         }
 582
 583         switch (param) {
 584         case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
 585         case ISCSI_IFACE_PARAM_HDRDGST_EN:
 586         case ISCSI_IFACE_PARAM_DATADGST_EN:
 587         case ISCSI_IFACE_PARAM_IMM_DATA_EN:
 588         case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
 589         case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
 590         case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
 591         case ISCSI_IFACE_PARAM_ERL:
 592         case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
 593         case ISCSI_IFACE_PARAM_FIRST_BURST:
 594         case ISCSI_IFACE_PARAM_MAX_R2T:
 595         case ISCSI_IFACE_PARAM_MAX_BURST:
 596         case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
 597         case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
 598         case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
 599         case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
 600         case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
 601         case ISCSI_IFACE_PARAM_INITIATOR_NAME:
 602                 param_type = ISCSI_IFACE_PARAM;
 603                 break;
 604         default:
 605                 param_type = ISCSI_NET_PARAM;
 606         }
 607
 608         return t->attr_is_visible(param_type, param);
 609 }
 610
 611 static struct attribute *iscsi_iface_attrs[] = {
 612         &dev_attr_iface_enabled.attr,
 613         &dev_attr_iface_vlan_id.attr,
 614         &dev_attr_iface_vlan_priority.attr,
 615         &dev_attr_iface_vlan_enabled.attr,
 616         &dev_attr_ipv4_iface_ipaddress.attr,
 617         &dev_attr_ipv4_iface_gateway.attr,
 618         &dev_attr_ipv4_iface_subnet.attr,
 619         &dev_attr_ipv4_iface_bootproto.attr,
 620         &dev_attr_ipv6_iface_ipaddress.attr,
 621         &dev_attr_ipv6_iface_link_local_addr.attr,
 622         &dev_attr_ipv6_iface_router_addr.attr,
 623         &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
 624         &dev_attr_ipv6_iface_link_local_autocfg.attr,
 625         &dev_attr_iface_mtu.attr,
 626         &dev_attr_iface_port.attr,
 627         &dev_attr_iface_ipaddress_state.attr,
 628         &dev_attr_iface_delayed_ack_en.attr,
 629         &dev_attr_iface_tcp_nagle_disable.attr,
 630         &dev_attr_iface_tcp_wsf_disable.attr,
 631         &dev_attr_iface_tcp_wsf.attr,
 632         &dev_attr_iface_tcp_timer_scale.attr,
 633         &dev_attr_iface_tcp_timestamp_en.attr,
 634         &dev_attr_iface_cache_id.attr,
 635         &dev_attr_iface_redirect_en.attr,
 636         &dev_attr_iface_def_taskmgmt_tmo.attr,
 637         &dev_attr_iface_header_digest.attr,
 638         &dev_attr_iface_data_digest.attr,
 639         &dev_attr_iface_immediate_data.attr,
 640         &dev_attr_iface_initial_r2t.attr,
 641         &dev_attr_iface_data_seq_in_order.attr,
 642         &dev_attr_iface_data_pdu_in_order.attr,
 643         &dev_attr_iface_erl.attr,
 644         &dev_attr_iface_max_recv_dlength.attr,
 645         &dev_attr_iface_first_burst_len.attr,
 646         &dev_attr_iface_max_outstanding_r2t.attr,
 647         &dev_attr_iface_max_burst_len.attr,
 648         &dev_attr_iface_chap_auth.attr,
 649         &dev_attr_iface_bidi_chap.attr,
 650         &dev_attr_iface_discovery_auth_optional.attr,
 651         &dev_attr_iface_discovery_logout.attr,
 652         &dev_attr_iface_strict_login_comp_en.attr,
 653         &dev_attr_iface_initiator_name.attr,
 654         &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
 655         &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
 656         &dev_attr_ipv4_iface_tos_en.attr,
 657         &dev_attr_ipv4_iface_tos.attr,
 658         &dev_attr_ipv4_iface_grat_arp_en.attr,
 659         &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
 660         &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
 661         &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
 662         &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
 663         &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
 664         &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
 665         &dev_attr_ipv4_iface_fragment_disable.attr,
 666         &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
 667         &dev_attr_ipv4_iface_ttl.attr,
 668         &dev_attr_ipv6_iface_link_local_state.attr,
 669         &dev_attr_ipv6_iface_router_state.attr,
 670         &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
 671         &dev_attr_ipv6_iface_mld_en.attr,
 672         &dev_attr_ipv6_iface_flow_label.attr,
 673         &dev_attr_ipv6_iface_traffic_class.attr,
 674         &dev_attr_ipv6_iface_hop_limit.attr,
 675         &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
 676         &dev_attr_ipv6_iface_nd_rexmit_time.attr,
 677         &dev_attr_ipv6_iface_nd_stale_tmo.attr,
 678         &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
 679         &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
 680         NULL,
 681 };
 682
 683 static struct attribute_group iscsi_iface_group = {
 684         .attrs = iscsi_iface_attrs,
 685         .is_visible = iscsi_iface_attr_is_visible,
 686 };
 687
 688 /* convert iscsi_ipaddress_state values to ascii string name */
 689 static const struct {
 690         enum iscsi_ipaddress_state      value;
 691         char                            *name;
 692 } iscsi_ipaddress_state_names[] = {
 693         {ISCSI_IPDDRESS_STATE_UNCONFIGURED,     "Unconfigured" },
 694         {ISCSI_IPDDRESS_STATE_ACQUIRING,        "Acquiring" },
 695         {ISCSI_IPDDRESS_STATE_TENTATIVE,        "Tentative" },
 696         {ISCSI_IPDDRESS_STATE_VALID,            "Valid" },
 697         {ISCSI_IPDDRESS_STATE_DISABLING,        "Disabling" },
 698         {ISCSI_IPDDRESS_STATE_INVALID,          "Invalid" },
 699         {ISCSI_IPDDRESS_STATE_DEPRECATED,       "Deprecated" },
 700 };
 701
 702 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
 703 {
 704         int i;
 705         char *state = NULL;
 706
 707         for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
 708                 if (iscsi_ipaddress_state_names[i].value == port_state) {
 709                         state = iscsi_ipaddress_state_names[i].name;
 710                         break;
 711                 }
 712         }
 713         return state;
 714 }
 715 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
 716
 717 /* convert iscsi_router_state values to ascii string name */
 718 static const struct {
 719         enum iscsi_router_state value;
 720         char                    *name;
 721 } iscsi_router_state_names[] = {
 722         {ISCSI_ROUTER_STATE_UNKNOWN,            "Unknown" },
 723         {ISCSI_ROUTER_STATE_ADVERTISED,         "Advertised" },
 724         {ISCSI_ROUTER_STATE_MANUAL,             "Manual" },
 725         {ISCSI_ROUTER_STATE_STALE,              "Stale" },
 726 };
 727
 728 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
 729 {
 730         int i;
 731         char *state = NULL;
 732
 733         for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
 734                 if (iscsi_router_state_names[i].value == router_state) {
 735                         state = iscsi_router_state_names[i].name;
 736                         break;
 737                 }
 738         }
 739         return state;
 740 }
 741 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
 742
 743 struct iscsi_iface *
 744 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
 745                    uint32_t iface_type, uint32_t iface_num, int dd_size)
 746 {
 747         struct iscsi_iface *iface;
 748         int err;
 749
 750         iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
 751         if (!iface)
 752                 return NULL;
 753
 754         iface->transport = transport;
 755         iface->iface_type = iface_type;
 756         iface->iface_num = iface_num;
 757         iface->dev.release = iscsi_iface_release;
 758         iface->dev.class = &iscsi_iface_class;
 759         /* parent reference released in iscsi_iface_release */
 760         iface->dev.parent = get_device(&shost->shost_gendev);
 761         if (iface_type == ISCSI_IFACE_TYPE_IPV4)
 762                 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
 763                              iface_num);
 764         else
 765                 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
 766                              iface_num);
 767
 768         err = device_register(&iface->dev);
 769         if (err)
 770                 goto free_iface;
 771
 772         err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
 773         if (err)
 774                 goto unreg_iface;
 775
 776         if (dd_size)
 777                 iface->dd_data = &iface[1];
 778         return iface;
 779
 780 unreg_iface:
 781         device_unregister(&iface->dev);
 782         return NULL;
 783
 784 free_iface:
 785         put_device(iface->dev.parent);
 786         kfree(iface);
 787         return NULL;
 788 }
 789 EXPORT_SYMBOL_GPL(iscsi_create_iface);
 790
 791 void iscsi_destroy_iface(struct iscsi_iface *iface)
 792 {
 793         sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
 794         device_unregister(&iface->dev);
 795 }
 796 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
 797
 798 /*
 799  * Interface to display flash node params to sysfs
 800  */
 801
 802 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store)      \
 803 struct device_attribute dev_attr_##_prefix##_##_name =                  \
 804         __ATTR(_name, _mode, _show, _store)
 805
 806 /* flash node session attrs show */
 807 #define iscsi_flashnode_sess_attr_show(type, name, param)               \
 808 static ssize_t                                                          \
 809 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
 810                      char *buf)                                         \
 811 {                                                                       \
 812         struct iscsi_bus_flash_session *fnode_sess =                    \
 813                                         iscsi_dev_to_flash_session(dev);\
 814         struct iscsi_transport *t = fnode_sess->transport;              \
 815         return t->get_flashnode_param(fnode_sess, param, buf);          \
 816 }                                                                       \
 817
 818
 819 #define iscsi_flashnode_sess_attr(type, name, param)                    \
 820         iscsi_flashnode_sess_attr_show(type, name, param)               \
 821 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO,                        \
 822                             show_##type##_##name, NULL);
 823
 824 /* Flash node session attributes */
 825
 826 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
 827                           ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
 828 iscsi_flashnode_sess_attr(fnode, discovery_session,
 829                           ISCSI_FLASHNODE_DISCOVERY_SESS);
 830 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
 831 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
 832 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
 833 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
 834 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
 835                           ISCSI_FLASHNODE_DATASEQ_INORDER);
 836 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
 837                           ISCSI_FLASHNODE_PDU_INORDER);
 838 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
 839 iscsi_flashnode_sess_attr(fnode, discovery_logout,
 840                           ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
 841 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
 842 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
 843                           ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
 844 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
 845 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
 846 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
 847 iscsi_flashnode_sess_attr(fnode, def_time2retain,
 848                           ISCSI_FLASHNODE_DEF_TIME2RETAIN);
 849 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
 850 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
 851 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
 852 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
 853 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
 854                           ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
 855 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
 856 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
 857 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
 858 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
 859                           ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
 860 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
 861                           ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
 862 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
 863 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
 864 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
 865 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
 866 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
 867 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
 868 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
 869
 870 static struct attribute *iscsi_flashnode_sess_attrs[] = {
 871         &dev_attr_fnode_auto_snd_tgt_disable.attr,
 872         &dev_attr_fnode_discovery_session.attr,
 873         &dev_attr_fnode_portal_type.attr,
 874         &dev_attr_fnode_entry_enable.attr,
 875         &dev_attr_fnode_immediate_data.attr,
 876         &dev_attr_fnode_initial_r2t.attr,
 877         &dev_attr_fnode_data_seq_in_order.attr,
 878         &dev_attr_fnode_data_pdu_in_order.attr,
 879         &dev_attr_fnode_chap_auth.attr,
 880         &dev_attr_fnode_discovery_logout.attr,
 881         &dev_attr_fnode_bidi_chap.attr,
 882         &dev_attr_fnode_discovery_auth_optional.attr,
 883         &dev_attr_fnode_erl.attr,
 884         &dev_attr_fnode_first_burst_len.attr,
 885         &dev_attr_fnode_def_time2wait.attr,
 886         &dev_attr_fnode_def_time2retain.attr,
 887         &dev_attr_fnode_max_outstanding_r2t.attr,
 888         &dev_attr_fnode_isid.attr,
 889         &dev_attr_fnode_tsid.attr,
 890         &dev_attr_fnode_max_burst_len.attr,
 891         &dev_attr_fnode_def_taskmgmt_tmo.attr,
 892         &dev_attr_fnode_targetalias.attr,
 893         &dev_attr_fnode_targetname.attr,
 894         &dev_attr_fnode_tpgt.attr,
 895         &dev_attr_fnode_discovery_parent_idx.attr,
 896         &dev_attr_fnode_discovery_parent_type.attr,
 897         &dev_attr_fnode_chap_in_idx.attr,
 898         &dev_attr_fnode_chap_out_idx.attr,
 899         &dev_attr_fnode_username.attr,
 900         &dev_attr_fnode_username_in.attr,
 901         &dev_attr_fnode_password.attr,
 902         &dev_attr_fnode_password_in.attr,
 903         &dev_attr_fnode_is_boot_target.attr,
 904         NULL,
 905 };
 906
 907 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
 908                                                     struct attribute *attr,
 909                                                     int i)
 910 {
 911         struct device *dev = container_of(kobj, struct device, kobj);
 912         struct iscsi_bus_flash_session *fnode_sess =
 913                                                 iscsi_dev_to_flash_session(dev);
 914         struct iscsi_transport *t = fnode_sess->transport;
 915         int param;
 916
 917         if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
 918                 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
 919         } else if (attr == &dev_attr_fnode_discovery_session.attr) {
 920                 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
 921         } else if (attr == &dev_attr_fnode_portal_type.attr) {
 922                 param = ISCSI_FLASHNODE_PORTAL_TYPE;
 923         } else if (attr == &dev_attr_fnode_entry_enable.attr) {
 924                 param = ISCSI_FLASHNODE_ENTRY_EN;
 925         } else if (attr == &dev_attr_fnode_immediate_data.attr) {
 926                 param = ISCSI_FLASHNODE_IMM_DATA_EN;
 927         } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
 928                 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
 929         } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
 930                 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
 931         } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
 932                 param = ISCSI_FLASHNODE_PDU_INORDER;
 933         } else if (attr == &dev_attr_fnode_chap_auth.attr) {
 934                 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
 935         } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
 936                 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
 937         } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
 938                 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
 939         } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
 940                 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
 941         } else if (attr == &dev_attr_fnode_erl.attr) {
 942                 param = ISCSI_FLASHNODE_ERL;
 943         } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
 944                 param = ISCSI_FLASHNODE_FIRST_BURST;
 945         } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
 946                 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
 947         } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
 948                 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
 949         } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
 950                 param = ISCSI_FLASHNODE_MAX_R2T;
 951         } else if (attr == &dev_attr_fnode_isid.attr) {
 952                 param = ISCSI_FLASHNODE_ISID;
 953         } else if (attr == &dev_attr_fnode_tsid.attr) {
 954                 param = ISCSI_FLASHNODE_TSID;
 955         } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
 956                 param = ISCSI_FLASHNODE_MAX_BURST;
 957         } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
 958                 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
 959         } else if (attr == &dev_attr_fnode_targetalias.attr) {
 960                 param = ISCSI_FLASHNODE_ALIAS;
 961         } else if (attr == &dev_attr_fnode_targetname.attr) {
 962                 param = ISCSI_FLASHNODE_NAME;
 963         } else if (attr == &dev_attr_fnode_tpgt.attr) {
 964                 param = ISCSI_FLASHNODE_TPGT;
 965         } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
 966                 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
 967         } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
 968                 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
 969         } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
 970                 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
 971         } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
 972                 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
 973         } else if (attr == &dev_attr_fnode_username.attr) {
 974                 param = ISCSI_FLASHNODE_USERNAME;
 975         } else if (attr == &dev_attr_fnode_username_in.attr) {
 976                 param = ISCSI_FLASHNODE_USERNAME_IN;
 977         } else if (attr == &dev_attr_fnode_password.attr) {
 978                 param = ISCSI_FLASHNODE_PASSWORD;
 979         } else if (attr == &dev_attr_fnode_password_in.attr) {
 980                 param = ISCSI_FLASHNODE_PASSWORD_IN;
 981         } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
 982                 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
 983         } else {
 984                 WARN_ONCE(1, "Invalid flashnode session attr");
 985                 return 0;
 986         }
 987
 988         return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
 989 }
 990
 991 static struct attribute_group iscsi_flashnode_sess_attr_group = {
 992         .attrs = iscsi_flashnode_sess_attrs,
 993         .is_visible = iscsi_flashnode_sess_attr_is_visible,
 994 };
 995
 996 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
 997         &iscsi_flashnode_sess_attr_group,
 998         NULL,
 999 };
1000
1001 static void iscsi_flashnode_sess_release(struct device *dev)
1002 {
1003         struct iscsi_bus_flash_session *fnode_sess =
1004                                                 iscsi_dev_to_flash_session(dev);
1005
1006         kfree(fnode_sess->targetname);
1007         kfree(fnode_sess->targetalias);
1008         kfree(fnode_sess->portal_type);
1009         kfree(fnode_sess);
1010 }
1011
1012 static const struct device_type iscsi_flashnode_sess_dev_type = {
1013         .name = "iscsi_flashnode_sess_dev_type",
1014         .groups = iscsi_flashnode_sess_attr_groups,
1015         .release = iscsi_flashnode_sess_release,
1016 };
1017
1018 /* flash node connection attrs show */
1019 #define iscsi_flashnode_conn_attr_show(type, name, param)               \
1020 static ssize_t                                                          \
1021 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1022                      char *buf)                                         \
1023 {                                                                       \
1024         struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1025         struct iscsi_bus_flash_session *fnode_sess =                    \
1026                                 iscsi_flash_conn_to_flash_session(fnode_conn);\
1027         struct iscsi_transport *t = fnode_conn->transport;              \
1028         return t->get_flashnode_param(fnode_sess, param, buf);          \
1029 }                                                                       \
1030
1031
1032 #define iscsi_flashnode_conn_attr(type, name, param)                    \
1033         iscsi_flashnode_conn_attr_show(type, name, param)               \
1034 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO,                        \
1035                             show_##type##_##name, NULL);
1036
1037 /* Flash node connection attributes */
1038
1039 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1040                           ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1041 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1042 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1043 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1044 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1045                           ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1046 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1047                           ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1048 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1049                           ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1050 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1051                           ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1052 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1053                           ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1054 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1055                           ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1056 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1057 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1058 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1059 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1060                           ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1061 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1062                           ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1063 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1064 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1065 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1066 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1067                           ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1068 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1069                           ISCSI_FLASHNODE_REDIRECT_IPADDR);
1070 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1071                           ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1072 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1073                           ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1074 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1075 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1076 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1077 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1078
1079 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1080         &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1081         &dev_attr_fnode_header_digest.attr,
1082         &dev_attr_fnode_data_digest.attr,
1083         &dev_attr_fnode_snack_req.attr,
1084         &dev_attr_fnode_tcp_timestamp_stat.attr,
1085         &dev_attr_fnode_tcp_nagle_disable.attr,
1086         &dev_attr_fnode_tcp_wsf_disable.attr,
1087         &dev_attr_fnode_tcp_timer_scale.attr,
1088         &dev_attr_fnode_tcp_timestamp_enable.attr,
1089         &dev_attr_fnode_fragment_disable.attr,
1090         &dev_attr_fnode_max_recv_dlength.attr,
1091         &dev_attr_fnode_max_xmit_dlength.attr,
1092         &dev_attr_fnode_keepalive_tmo.attr,
1093         &dev_attr_fnode_port.attr,
1094         &dev_attr_fnode_ipaddress.attr,
1095         &dev_attr_fnode_redirect_ipaddr.attr,
1096         &dev_attr_fnode_max_segment_size.attr,
1097         &dev_attr_fnode_local_port.attr,
1098         &dev_attr_fnode_ipv4_tos.attr,
1099         &dev_attr_fnode_ipv6_traffic_class.attr,
1100         &dev_attr_fnode_ipv6_flow_label.attr,
1101         &dev_attr_fnode_link_local_ipv6.attr,
1102         &dev_attr_fnode_tcp_xmit_wsf.attr,
1103         &dev_attr_fnode_tcp_recv_wsf.attr,
1104         &dev_attr_fnode_statsn.attr,
1105         &dev_attr_fnode_exp_statsn.attr,
1106         NULL,
1107 };
1108
1109 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1110                                                     struct attribute *attr,
1111                                                     int i)
1112 {
1113         struct device *dev = container_of(kobj, struct device, kobj);
1114         struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1115         struct iscsi_transport *t = fnode_conn->transport;
1116         int param;
1117
1118         if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1119                 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1120         } else if (attr == &dev_attr_fnode_header_digest.attr) {
1121                 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1122         } else if (attr == &dev_attr_fnode_data_digest.attr) {
1123                 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1124         } else if (attr == &dev_attr_fnode_snack_req.attr) {
1125                 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1126         } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1127                 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1128         } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1129                 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1130         } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1131                 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1132         } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1133                 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1134         } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1135                 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1136         } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1137                 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1138         } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1139                 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1140         } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1141                 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1142         } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1143                 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1144         } else if (attr == &dev_attr_fnode_port.attr) {
1145                 param = ISCSI_FLASHNODE_PORT;
1146         } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1147                 param = ISCSI_FLASHNODE_IPADDR;
1148         } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1149                 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1150         } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1151                 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1152         } else if (attr == &dev_attr_fnode_local_port.attr) {
1153                 param = ISCSI_FLASHNODE_LOCAL_PORT;
1154         } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1155                 param = ISCSI_FLASHNODE_IPV4_TOS;
1156         } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1157                 param = ISCSI_FLASHNODE_IPV6_TC;
1158         } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1159                 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1160         } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1161                 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1162         } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1163                 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1164         } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1165                 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1166         } else if (attr == &dev_attr_fnode_statsn.attr) {
1167                 param = ISCSI_FLASHNODE_STATSN;
1168         } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1169                 param = ISCSI_FLASHNODE_EXP_STATSN;
1170         } else {
1171                 WARN_ONCE(1, "Invalid flashnode connection attr");
1172                 return 0;
1173         }
1174
1175         return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1176 }
1177
1178 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1179         .attrs = iscsi_flashnode_conn_attrs,
1180         .is_visible = iscsi_flashnode_conn_attr_is_visible,
1181 };
1182
1183 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1184         &iscsi_flashnode_conn_attr_group,
1185         NULL,
1186 };
1187
1188 static void iscsi_flashnode_conn_release(struct device *dev)
1189 {
1190         struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1191
1192         kfree(fnode_conn->ipaddress);
1193         kfree(fnode_conn->redirect_ipaddr);
1194         kfree(fnode_conn->link_local_ipv6_addr);
1195         kfree(fnode_conn);
1196 }
1197
1198 static const struct device_type iscsi_flashnode_conn_dev_type = {
1199         .name = "iscsi_flashnode_conn_dev_type",
1200         .groups = iscsi_flashnode_conn_attr_groups,
1201         .release = iscsi_flashnode_conn_release,
1202 };
1203
1204 static struct bus_type iscsi_flashnode_bus;
1205
1206 int iscsi_flashnode_bus_match(struct device *dev,
1207                                      struct device_driver *drv)
1208 {
1209         if (dev->bus == &iscsi_flashnode_bus)
1210                 return 1;
1211         return 0;
1212 }
1213 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1214
1215 static struct bus_type iscsi_flashnode_bus = {
1216         .name = "iscsi_flashnode",
1217         .match = &iscsi_flashnode_bus_match,
1218 };
1219
1220 /**
1221  * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1222  * @shost: pointer to host data
1223  * @index: index of flashnode to add in sysfs
1224  * @transport: pointer to transport data
1225  * @dd_size: total size to allocate
1226  *
1227  * Adds a sysfs entry for the flashnode session attributes
1228  *
1229  * Returns:
1230  *  pointer to allocated flashnode sess on success
1231  *  %NULL on failure
1232  */
1233 struct iscsi_bus_flash_session *
1234 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1235                             struct iscsi_transport *transport,
1236                             int dd_size)
1237 {
1238         struct iscsi_bus_flash_session *fnode_sess;
1239         int err;
1240
1241         fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1242         if (!fnode_sess)
1243                 return NULL;
1244
1245         fnode_sess->transport = transport;
1246         fnode_sess->target_id = index;
1247         fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1248         fnode_sess->dev.bus = &iscsi_flashnode_bus;
1249         fnode_sess->dev.parent = &shost->shost_gendev;
1250         dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1251                      shost->host_no, index);
1252
1253         err = device_register(&fnode_sess->dev);
1254         if (err)
1255                 goto free_fnode_sess;
1256
1257         if (dd_size)
1258                 fnode_sess->dd_data = &fnode_sess[1];
1259
1260         return fnode_sess;
1261
1262 free_fnode_sess:
1263         kfree(fnode_sess);
1264         return NULL;
1265 }
1266 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1267
1268 /**
1269  * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1270  * @shost: pointer to host data
1271  * @fnode_sess: pointer to the parent flashnode session entry
1272  * @transport: pointer to transport data
1273  * @dd_size: total size to allocate
1274  *
1275  * Adds a sysfs entry for the flashnode connection attributes
1276  *
1277  * Returns:
1278  *  pointer to allocated flashnode conn on success
1279  *  %NULL on failure
1280  */
1281 struct iscsi_bus_flash_conn *
1282 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1283                             struct iscsi_bus_flash_session *fnode_sess,
1284                             struct iscsi_transport *transport,
1285                             int dd_size)
1286 {
1287         struct iscsi_bus_flash_conn *fnode_conn;
1288         int err;
1289
1290         fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1291         if (!fnode_conn)
1292                 return NULL;
1293
1294         fnode_conn->transport = transport;
1295         fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1296         fnode_conn->dev.bus = &iscsi_flashnode_bus;
1297         fnode_conn->dev.parent = &fnode_sess->dev;
1298         dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1299                      shost->host_no, fnode_sess->target_id);
1300
1301         err = device_register(&fnode_conn->dev);
1302         if (err)
1303                 goto free_fnode_conn;
1304
1305         if (dd_size)
1306                 fnode_conn->dd_data = &fnode_conn[1];
1307
1308         return fnode_conn;
1309
1310 free_fnode_conn:
1311         kfree(fnode_conn);
1312         return NULL;
1313 }
1314 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1315
1316 /**
1317  * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1318  * @dev: device to verify
1319  * @data: pointer to data containing value to use for verification
1320  *
1321  * Verifies if the passed device is flashnode conn device
1322  *
1323  * Returns:
1324  *  1 on success
1325  *  0 on failure
1326  */
1327 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1328 {
1329         return dev->bus == &iscsi_flashnode_bus;
1330 }
1331
1332 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1333 {
1334         device_unregister(&fnode_conn->dev);
1335         return 0;
1336 }
1337
1338 static int flashnode_match_index(struct device *dev, void *data)
1339 {
1340         struct iscsi_bus_flash_session *fnode_sess = NULL;
1341         int ret = 0;
1342
1343         if (!iscsi_flashnode_bus_match(dev, NULL))
1344                 goto exit_match_index;
1345
1346         fnode_sess = iscsi_dev_to_flash_session(dev);
1347         ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1348
1349 exit_match_index:
1350         return ret;
1351 }
1352
1353 /**
1354  * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1355  * @shost: pointer to host data
1356  * @idx: index to match
1357  *
1358  * Finds the flashnode session object for the passed index
1359  *
1360  * Returns:
1361  *  pointer to found flashnode session object on success
1362  *  %NULL on failure
1363  */
1364 static struct iscsi_bus_flash_session *
1365 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1366 {
1367         struct iscsi_bus_flash_session *fnode_sess = NULL;
1368         struct device *dev;
1369
1370         dev = device_find_child(&shost->shost_gendev, &idx,
1371                                 flashnode_match_index);
1372         if (dev)
1373                 fnode_sess = iscsi_dev_to_flash_session(dev);
1374
1375         return fnode_sess;
1376 }
1377
1378 /**
1379  * iscsi_find_flashnode_sess - finds flashnode session entry
1380  * @shost: pointer to host data
1381  * @data: pointer to data containing value to use for comparison
1382  * @fn: function pointer that does actual comparison
1383  *
1384  * Finds the flashnode session object comparing the data passed using logic
1385  * defined in passed function pointer
1386  *
1387  * Returns:
1388  *  pointer to found flashnode session device object on success
1389  *  %NULL on failure
1390  */
1391 struct device *
1392 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1393                           int (*fn)(struct device *dev, void *data))
1394 {
1395         return device_find_child(&shost->shost_gendev, data, fn);
1396 }
1397 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1398
1399 /**
1400  * iscsi_find_flashnode_conn - finds flashnode connection entry
1401  * @fnode_sess: pointer to parent flashnode session entry
1402  *
1403  * Finds the flashnode connection object comparing the data passed using logic
1404  * defined in passed function pointer
1405  *
1406  * Returns:
1407  *  pointer to found flashnode connection device object on success
1408  *  %NULL on failure
1409  */
1410 struct device *
1411 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1412 {
1413         return device_find_child(&fnode_sess->dev, NULL,
1414                                  iscsi_is_flashnode_conn_dev);
1415 }
1416 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1417
1418 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1419 {
1420         if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1421                 return 0;
1422
1423         return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1424 }
1425
1426 /**
1427  * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1428  * @fnode_sess: pointer to flashnode session entry to be destroyed
1429  *
1430  * Deletes the flashnode session entry and all children flashnode connection
1431  * entries from sysfs
1432  */
1433 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1434 {
1435         int err;
1436
1437         err = device_for_each_child(&fnode_sess->dev, NULL,
1438                                     iscsi_iter_destroy_flashnode_conn_fn);
1439         if (err)
1440                 pr_err("Could not delete all connections for %s. Error %d.\n",
1441                        fnode_sess->dev.kobj.name, err);
1442
1443         device_unregister(&fnode_sess->dev);
1444 }
1445 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1446
1447 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1448 {
1449         if (!iscsi_flashnode_bus_match(dev, NULL))
1450                 return 0;
1451
1452         iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1453         return 0;
1454 }
1455
1456 /**
1457  * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1458  * @shost: pointer to host data
1459  *
1460  * Destroys all the flashnode session entries and all corresponding children
1461  * flashnode connection entries from sysfs
1462  */
1463 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1464 {
1465         device_for_each_child(&shost->shost_gendev, NULL,
1466                               iscsi_iter_destroy_flashnode_fn);
1467 }
1468 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1469
1470 /*
1471  * BSG support
1472  */
1473 /**
1474  * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1475  * @job: bsg job to be processed
1476  */
1477 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1478 {
1479         struct Scsi_Host *shost = iscsi_job_to_shost(job);
1480         struct iscsi_bsg_request *req = job->request;
1481         struct iscsi_bsg_reply *reply = job->reply;
1482         struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1483         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
1484         int ret;
1485
1486         /* check if we have the msgcode value at least */
1487         if (job->request_len < sizeof(uint32_t)) {
1488                 ret = -ENOMSG;
1489                 goto fail_host_msg;
1490         }
1491
1492         /* Validate the host command */
1493         switch (req->msgcode) {
1494         case ISCSI_BSG_HST_VENDOR:
1495                 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1496                 if ((shost->hostt->vendor_id == 0L) ||
1497                     (req->rqst_data.h_vendor.vendor_id !=
1498                         shost->hostt->vendor_id)) {
1499                         ret = -ESRCH;
1500                         goto fail_host_msg;
1501                 }
1502                 break;
1503         default:
1504                 ret = -EBADR;
1505                 goto fail_host_msg;
1506         }
1507
1508         /* check if we really have all the request data needed */
1509         if (job->request_len < cmdlen) {
1510                 ret = -ENOMSG;
1511                 goto fail_host_msg;
1512         }
1513
1514         ret = i->iscsi_transport->bsg_request(job);
1515         if (!ret)
1516                 return 0;
1517
1518 fail_host_msg:
1519         /* return the errno failure code as the only status */
1520         BUG_ON(job->reply_len < sizeof(uint32_t));
1521         reply->reply_payload_rcv_len = 0;
1522         reply->result = ret;
1523         job->reply_len = sizeof(uint32_t);
1524         bsg_job_done(job, ret, 0);
1525         return 0;
1526 }
1527
1528 /**
1529  * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1530  * @shost: shost for iscsi_host
1531  * @ihost: iscsi_cls_host adding the structures to
1532  */
1533 static int
1534 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1535 {
1536         struct device *dev = &shost->shost_gendev;
1537         struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1538         struct request_queue *q;
1539         char bsg_name[20];
1540
1541         if (!i->iscsi_transport->bsg_request)
1542                 return -ENOTSUPP;
1543
1544         snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1545         q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1546         if (IS_ERR(q)) {
1547                 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1548                              "initialize - no request queue\n");
1549                 return PTR_ERR(q);
1550         }
1551         __scsi_init_queue(shost, q);
1552
1553         ihost->bsg_q = q;
1554         return 0;
1555 }
1556
1557 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1558                             struct device *cdev)
1559 {
1560         struct Scsi_Host *shost = dev_to_shost(dev);
1561         struct iscsi_cls_host *ihost = shost->shost_data;
1562
1563         memset(ihost, 0, sizeof(*ihost));
1564         atomic_set(&ihost->nr_scans, 0);
1565         mutex_init(&ihost->mutex);
1566
1567         iscsi_bsg_host_add(shost, ihost);
1568         /* ignore any bsg add error - we just can't do sgio */
1569
1570         return 0;
1571 }
1572
1573 static int iscsi_remove_host(struct transport_container *tc,
1574                              struct device *dev, struct device *cdev)
1575 {
1576         struct Scsi_Host *shost = dev_to_shost(dev);
1577         struct iscsi_cls_host *ihost = shost->shost_data;
1578
1579         bsg_remove_queue(ihost->bsg_q);
1580         return 0;
1581 }
1582
1583 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1584                                "iscsi_host",
1585                                iscsi_setup_host,
1586                                iscsi_remove_host,
1587                                NULL);
1588
1589 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1590                                "iscsi_session",
1591                                NULL,
1592                                NULL,
1593                                NULL);
1594
1595 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1596                                "iscsi_connection",
1597                                NULL,
1598                                NULL,
1599                                NULL);
1600
1601 static struct sock *nls;
1602 static DEFINE_MUTEX(rx_queue_mutex);
1603
1604 static LIST_HEAD(sesslist);
1605 static DEFINE_SPINLOCK(sesslock);
1606 static LIST_HEAD(connlist);
1607 static DEFINE_SPINLOCK(connlock);
1608
1609 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1610 {
1611         struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1612         return sess->sid;
1613 }
1614
1615 /*
1616  * Returns the matching session to a given sid
1617  */
1618 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1619 {
1620         unsigned long flags;
1621         struct iscsi_cls_session *sess;
1622
1623         spin_lock_irqsave(&sesslock, flags);
1624         list_for_each_entry(sess, &sesslist, sess_list) {
1625                 if (sess->sid == sid) {
1626                         spin_unlock_irqrestore(&sesslock, flags);
1627                         return sess;
1628                 }
1629         }
1630         spin_unlock_irqrestore(&sesslock, flags);
1631         return NULL;
1632 }
1633
1634 /*
1635  * Returns the matching connection to a given sid / cid tuple
1636  */
1637 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1638 {
1639         unsigned long flags;
1640         struct iscsi_cls_conn *conn;
1641
1642         spin_lock_irqsave(&connlock, flags);
1643         list_for_each_entry(conn, &connlist, conn_list) {
1644                 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1645                         spin_unlock_irqrestore(&connlock, flags);
1646                         return conn;
1647                 }
1648         }
1649         spin_unlock_irqrestore(&connlock, flags);
1650         return NULL;
1651 }
1652
1653 /*
1654  * The following functions can be used by LLDs that allocate
1655  * their own scsi_hosts or by software iscsi LLDs
1656  */
1657 static struct {
1658         int value;
1659         char *name;
1660 } iscsi_session_state_names[] = {
1661         { ISCSI_SESSION_LOGGED_IN,      "LOGGED_IN" },
1662         { ISCSI_SESSION_FAILED,         "FAILED" },
1663         { ISCSI_SESSION_FREE,           "FREE" },
1664 };
1665
1666 static const char *iscsi_session_state_name(int state)
1667 {
1668         int i;
1669         char *name = NULL;
1670
1671         for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1672                 if (iscsi_session_state_names[i].value == state) {
1673                         name = iscsi_session_state_names[i].name;
1674                         break;
1675                 }
1676         }
1677         return name;
1678 }
1679
1680 int iscsi_session_chkready(struct iscsi_cls_session *session)
1681 {
1682         unsigned long flags;
1683         int err;
1684
1685         spin_lock_irqsave(&session->lock, flags);
1686         switch (session->state) {
1687         case ISCSI_SESSION_LOGGED_IN:
1688                 err = 0;
1689                 break;
1690         case ISCSI_SESSION_FAILED:
1691                 err = DID_IMM_RETRY << 16;
1692                 break;
1693         case ISCSI_SESSION_FREE:
1694                 err = DID_TRANSPORT_FAILFAST << 16;
1695                 break;
1696         default:
1697                 err = DID_NO_CONNECT << 16;
1698                 break;
1699         }
1700         spin_unlock_irqrestore(&session->lock, flags);
1701         return err;
1702 }
1703 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1704
1705 int iscsi_is_session_online(struct iscsi_cls_session *session)
1706 {
1707         unsigned long flags;
1708         int ret = 0;
1709
1710         spin_lock_irqsave(&session->lock, flags);
1711         if (session->state == ISCSI_SESSION_LOGGED_IN)
1712                 ret = 1;
1713         spin_unlock_irqrestore(&session->lock, flags);
1714         return ret;
1715 }
1716 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1717
1718 static void iscsi_session_release(struct device *dev)
1719 {
1720         struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1721         struct Scsi_Host *shost;
1722
1723         shost = iscsi_session_to_shost(session);
1724         scsi_host_put(shost);
1725         ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1726         kfree(session);
1727 }
1728
1729 int iscsi_is_session_dev(const struct device *dev)
1730 {
1731         return dev->release == iscsi_session_release;
1732 }
1733 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1734
1735 static int iscsi_iter_session_fn(struct device *dev, void *data)
1736 {
1737         void (* fn) (struct iscsi_cls_session *) = data;
1738
1739         if (!iscsi_is_session_dev(dev))
1740                 return 0;
1741         fn(iscsi_dev_to_session(dev));
1742         return 0;
1743 }
1744
1745 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1746                                  void (*fn)(struct iscsi_cls_session *))
1747 {
1748         device_for_each_child(&shost->shost_gendev, fn,
1749                               iscsi_iter_session_fn);
1750 }
1751 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1752
1753 /**
1754  * iscsi_scan_finished - helper to report when running scans are done
1755  * @shost: scsi host
1756  * @time: scan run time
1757  *
1758  * This function can be used by drives like qla4xxx to report to the scsi
1759  * layer when the scans it kicked off at module load time are done.
1760  */
1761 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1762 {
1763         struct iscsi_cls_host *ihost = shost->shost_data;
1764         /*
1765          * qla4xxx will have kicked off some session unblocks before calling
1766          * scsi_scan_host, so just wait for them to complete.
1767          */
1768         return !atomic_read(&ihost->nr_scans);
1769 }
1770 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1771
1772 struct iscsi_scan_data {
1773         unsigned int channel;
1774         unsigned int id;
1775         u64 lun;
1776         enum scsi_scan_mode rescan;
1777 };
1778
1779 static int iscsi_user_scan_session(struct device *dev, void *data)
1780 {
1781         struct iscsi_scan_data *scan_data = data;
1782         struct iscsi_cls_session *session;
1783         struct Scsi_Host *shost;
1784         struct iscsi_cls_host *ihost;
1785         unsigned long flags;
1786         unsigned int id;
1787
1788         if (!iscsi_is_session_dev(dev))
1789                 return 0;
1790
1791         session = iscsi_dev_to_session(dev);
1792
1793         ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1794
1795         shost = iscsi_session_to_shost(session);
1796         ihost = shost->shost_data;
1797
1798         mutex_lock(&ihost->mutex);
1799         spin_lock_irqsave(&session->lock, flags);
1800         if (session->state != ISCSI_SESSION_LOGGED_IN) {
1801                 spin_unlock_irqrestore(&session->lock, flags);
1802                 goto user_scan_exit;
1803         }
1804         id = session->target_id;
1805         spin_unlock_irqrestore(&session->lock, flags);
1806
1807         if (id != ISCSI_MAX_TARGET) {
1808                 if ((scan_data->channel == SCAN_WILD_CARD ||
1809                      scan_data->channel == 0) &&
1810                     (scan_data->id == SCAN_WILD_CARD ||
1811                      scan_data->id == id))
1812                         scsi_scan_target(&session->dev, 0, id,
1813                                          scan_data->lun, scan_data->rescan);
1814         }
1815
1816 user_scan_exit:
1817         mutex_unlock(&ihost->mutex);
1818         ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1819         return 0;
1820 }
1821
1822 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1823                            uint id, u64 lun)
1824 {
1825         struct iscsi_scan_data scan_data;
1826
1827         scan_data.channel = channel;
1828         scan_data.id = id;
1829         scan_data.lun = lun;
1830         scan_data.rescan = SCSI_SCAN_MANUAL;
1831
1832         return device_for_each_child(&shost->shost_gendev, &scan_data,
1833                                      iscsi_user_scan_session);
1834 }
1835
1836 static void iscsi_scan_session(struct work_struct *work)
1837 {
1838         struct iscsi_cls_session *session =
1839                         container_of(work, struct iscsi_cls_session, scan_work);
1840         struct Scsi_Host *shost = iscsi_session_to_shost(session);
1841         struct iscsi_cls_host *ihost = shost->shost_data;
1842         struct iscsi_scan_data scan_data;
1843
1844         scan_data.channel = 0;
1845         scan_data.id = SCAN_WILD_CARD;
1846         scan_data.lun = SCAN_WILD_CARD;
1847         scan_data.rescan = SCSI_SCAN_RESCAN;
1848
1849         iscsi_user_scan_session(&session->dev, &scan_data);
1850         atomic_dec(&ihost->nr_scans);
1851 }
1852
1853 /**
1854  * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1855  * @cmd: scsi cmd passed to scsi eh handler
1856  *
1857  * If the session is down this function will wait for the recovery
1858  * timer to fire or for the session to be logged back in. If the
1859  * recovery timer fires then FAST_IO_FAIL is returned. The caller
1860  * should pass this error value to the scsi eh.
1861  */
1862 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1863 {
1864         struct iscsi_cls_session *session =
1865                         starget_to_session(scsi_target(cmd->device));
1866         unsigned long flags;
1867         int ret = 0;
1868
1869         spin_lock_irqsave(&session->lock, flags);
1870         while (session->state != ISCSI_SESSION_LOGGED_IN) {
1871                 if (session->state == ISCSI_SESSION_FREE) {
1872                         ret = FAST_IO_FAIL;
1873                         break;
1874                 }
1875                 spin_unlock_irqrestore(&session->lock, flags);
1876                 msleep(1000);
1877                 spin_lock_irqsave(&session->lock, flags);
1878         }
1879         spin_unlock_irqrestore(&session->lock, flags);
1880         return ret;
1881 }
1882 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1883
1884 static void session_recovery_timedout(struct work_struct *work)
1885 {
1886         struct iscsi_cls_session *session =
1887                 container_of(work, struct iscsi_cls_session,
1888                              recovery_work.work);
1889         unsigned long flags;
1890
1891         iscsi_cls_session_printk(KERN_INFO, session,
1892                                  "session recovery timed out after %d secs\n",
1893                                  session->recovery_tmo);
1894
1895         spin_lock_irqsave(&session->lock, flags);
1896         switch (session->state) {
1897         case ISCSI_SESSION_FAILED:
1898                 session->state = ISCSI_SESSION_FREE;
1899                 break;
1900         case ISCSI_SESSION_LOGGED_IN:
1901         case ISCSI_SESSION_FREE:
1902                 /* we raced with the unblock's flush */
1903                 spin_unlock_irqrestore(&session->lock, flags);
1904                 return;
1905         }
1906         spin_unlock_irqrestore(&session->lock, flags);
1907
1908         if (session->transport->session_recovery_timedout)
1909                 session->transport->session_recovery_timedout(session);
1910
1911         ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1912         scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1913         ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1914 }
1915
1916 static void __iscsi_unblock_session(struct work_struct *work)
1917 {
1918         struct iscsi_cls_session *session =
1919                         container_of(work, struct iscsi_cls_session,
1920                                      unblock_work);
1921         struct Scsi_Host *shost = iscsi_session_to_shost(session);
1922         struct iscsi_cls_host *ihost = shost->shost_data;
1923         unsigned long flags;
1924
1925         ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1926         /*
1927          * The recovery and unblock work get run from the same workqueue,
1928          * so try to cancel it if it was going to run after this unblock.
1929          */
1930         cancel_delayed_work(&session->recovery_work);
1931         spin_lock_irqsave(&session->lock, flags);
1932         session->state = ISCSI_SESSION_LOGGED_IN;
1933         spin_unlock_irqrestore(&session->lock, flags);
1934         /* start IO */
1935         scsi_target_unblock(&session->dev, SDEV_RUNNING);
1936         /*
1937          * Only do kernel scanning if the driver is properly hooked into
1938          * the async scanning code (drivers like iscsi_tcp do login and
1939          * scanning from userspace).
1940          */
1941         if (shost->hostt->scan_finished) {
1942                 if (scsi_queue_work(shost, &session->scan_work))
1943                         atomic_inc(&ihost->nr_scans);
1944         }
1945         ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1946 }
1947
1948 /**
1949  * iscsi_unblock_session - set a session as logged in and start IO.
1950  * @session: iscsi session
1951  *
1952  * Mark a session as ready to accept IO.
1953  */
1954 void iscsi_unblock_session(struct iscsi_cls_session *session)
1955 {
1956         queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1957         /*
1958          * make sure all the events have completed before tell the driver
1959          * it is safe
1960          */
1961         flush_workqueue(iscsi_eh_timer_workq);
1962 }
1963 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1964
1965 static void __iscsi_block_session(struct work_struct *work)
1966 {
1967         struct iscsi_cls_session *session =
1968                         container_of(work, struct iscsi_cls_session,
1969                                      block_work);
1970         unsigned long flags;
1971
1972         ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1973         spin_lock_irqsave(&session->lock, flags);
1974         session->state = ISCSI_SESSION_FAILED;
1975         spin_unlock_irqrestore(&session->lock, flags);
1976         scsi_target_block(&session->dev);
1977         ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1978         if (session->recovery_tmo >= 0)
1979                 queue_delayed_work(iscsi_eh_timer_workq,
1980                                    &session->recovery_work,
1981                                    session->recovery_tmo * HZ);
1982 }
1983
1984 void iscsi_block_session(struct iscsi_cls_session *session)
1985 {
1986         queue_work(iscsi_eh_timer_workq, &session->block_work);
1987 }
1988 EXPORT_SYMBOL_GPL(iscsi_block_session);
1989
1990 static void __iscsi_unbind_session(struct work_struct *work)
1991 {
1992         struct iscsi_cls_session *session =
1993                         container_of(work, struct iscsi_cls_session,
1994                                      unbind_work);
1995         struct Scsi_Host *shost = iscsi_session_to_shost(session);
1996         struct iscsi_cls_host *ihost = shost->shost_data;
1997         unsigned long flags;
1998         unsigned int target_id;
1999
2000         ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2001
2002         /* Prevent new scans and make sure scanning is not in progress */
2003         mutex_lock(&ihost->mutex);
2004         spin_lock_irqsave(&session->lock, flags);
2005         if (session->target_id == ISCSI_MAX_TARGET) {
2006                 spin_unlock_irqrestore(&session->lock, flags);
2007                 mutex_unlock(&ihost->mutex);
2008                 return;
2009         }
2010
2011         target_id = session->target_id;
2012         session->target_id = ISCSI_MAX_TARGET;
2013         spin_unlock_irqrestore(&session->lock, flags);
2014         mutex_unlock(&ihost->mutex);
2015
2016         if (session->ida_used)
2017                 ida_simple_remove(&iscsi_sess_ida, target_id);
2018
2019         scsi_remove_target(&session->dev);
2020         iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2021         ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2022 }
2023
2024 struct iscsi_cls_session *
2025 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2026                     int dd_size)
2027 {
2028         struct iscsi_cls_session *session;
2029
2030         session = kzalloc(sizeof(*session) + dd_size,
2031                           GFP_KERNEL);
2032         if (!session)
2033                 return NULL;
2034
2035         session->transport = transport;
2036         session->creator = -1;
2037         session->recovery_tmo = 120;
2038         session->recovery_tmo_sysfs_override = false;
2039         session->state = ISCSI_SESSION_FREE;
2040         INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2041         INIT_LIST_HEAD(&session->sess_list);
2042         INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2043         INIT_WORK(&session->block_work, __iscsi_block_session);
2044         INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2045         INIT_WORK(&session->scan_work, iscsi_scan_session);
2046         spin_lock_init(&session->lock);
2047
2048         /* this is released in the dev's release function */
2049         scsi_host_get(shost);
2050         session->dev.parent = &shost->shost_gendev;
2051         session->dev.release = iscsi_session_release;
2052         device_initialize(&session->dev);
2053         if (dd_size)
2054                 session->dd_data = &session[1];
2055
2056         ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2057         return session;
2058 }
2059 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2060
2061 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2062 {
2063         unsigned long flags;
2064         int id = 0;
2065         int err;
2066
2067         session->sid = atomic_add_return(1, &iscsi_session_nr);
2068
2069         if (target_id == ISCSI_MAX_TARGET) {
2070                 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2071
2072                 if (id < 0) {
2073                         iscsi_cls_session_printk(KERN_ERR, session,
2074                                         "Failure in Target ID Allocation\n");
2075                         return id;
2076                 }
2077                 session->target_id = (unsigned int)id;
2078                 session->ida_used = true;
2079         } else
2080                 session->target_id = target_id;
2081
2082         dev_set_name(&session->dev, "session%u", session->sid);
2083         err = device_add(&session->dev);
2084         if (err) {
2085                 iscsi_cls_session_printk(KERN_ERR, session,
2086                                          "could not register session's dev\n");
2087                 goto release_ida;
2088         }
2089         transport_register_device(&session->dev);
2090
2091         spin_lock_irqsave(&sesslock, flags);
2092         list_add(&session->sess_list, &sesslist);
2093         spin_unlock_irqrestore(&sesslock, flags);
2094
2095         iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2096         ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2097         return 0;
2098
2099 release_ida:
2100         if (session->ida_used)
2101                 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2102
2103         return err;
2104 }
2105 EXPORT_SYMBOL_GPL(iscsi_add_session);
2106
2107 /**
2108  * iscsi_create_session - create iscsi class session
2109  * @shost: scsi host
2110  * @transport: iscsi transport
2111  * @dd_size: private driver data size
2112  * @target_id: which target
2113  *
2114  * This can be called from a LLD or iscsi_transport.
2115  */
2116 struct iscsi_cls_session *
2117 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2118                      int dd_size, unsigned int target_id)
2119 {
2120         struct iscsi_cls_session *session;
2121
2122         session = iscsi_alloc_session(shost, transport, dd_size);
2123         if (!session)
2124                 return NULL;
2125
2126         if (iscsi_add_session(session, target_id)) {
2127                 iscsi_free_session(session);
2128                 return NULL;
2129         }
2130         return session;
2131 }
2132 EXPORT_SYMBOL_GPL(iscsi_create_session);
2133
2134 static void iscsi_conn_release(struct device *dev)
2135 {
2136         struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2137         struct device *parent = conn->dev.parent;
2138
2139         ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2140         kfree(conn);
2141         put_device(parent);
2142 }
2143
2144 static int iscsi_is_conn_dev(const struct device *dev)
2145 {
2146         return dev->release == iscsi_conn_release;
2147 }
2148
2149 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2150 {
2151         if (!iscsi_is_conn_dev(dev))
2152                 return 0;
2153         return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2154 }
2155
2156 void iscsi_remove_session(struct iscsi_cls_session *session)
2157 {
2158         unsigned long flags;
2159         int err;
2160
2161         ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2162
2163         spin_lock_irqsave(&sesslock, flags);
2164         list_del(&session->sess_list);
2165         spin_unlock_irqrestore(&sesslock, flags);
2166
2167         /* make sure there are no blocks/unblocks queued */
2168         flush_workqueue(iscsi_eh_timer_workq);
2169         /* make sure the timedout callout is not running */
2170         if (!cancel_delayed_work(&session->recovery_work))
2171                 flush_workqueue(iscsi_eh_timer_workq);
2172         /*
2173          * If we are blocked let commands flow again. The lld or iscsi
2174          * layer should set up the queuecommand to fail commands.
2175          * We assume that LLD will not be calling block/unblock while
2176          * removing the session.
2177          */
2178         spin_lock_irqsave(&session->lock, flags);
2179         session->state = ISCSI_SESSION_FREE;
2180         spin_unlock_irqrestore(&session->lock, flags);
2181
2182         scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2183         /* flush running scans then delete devices */
2184         flush_work(&session->scan_work);
2185         __iscsi_unbind_session(&session->unbind_work);
2186
2187         /* hw iscsi may not have removed all connections from session */
2188         err = device_for_each_child(&session->dev, NULL,
2189                                     iscsi_iter_destroy_conn_fn);
2190         if (err)
2191                 iscsi_cls_session_printk(KERN_ERR, session,
2192                                          "Could not delete all connections "
2193                                          "for session. Error %d.\n", err);
2194
2195         transport_unregister_device(&session->dev);
2196
2197         ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2198         device_del(&session->dev);
2199 }
2200 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2201
2202 void iscsi_free_session(struct iscsi_cls_session *session)
2203 {
2204         ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2205         iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2206         put_device(&session->dev);
2207 }
2208 EXPORT_SYMBOL_GPL(iscsi_free_session);
2209
2210 /**
2211  * iscsi_create_conn - create iscsi class connection
2212  * @session: iscsi cls session
2213  * @dd_size: private driver data size
2214  * @cid: connection id
2215  *
2216  * This can be called from a LLD or iscsi_transport. The connection
2217  * is child of the session so cid must be unique for all connections
2218  * on the session.
2219  *
2220  * Since we do not support MCS, cid will normally be zero. In some cases
2221  * for software iscsi we could be trying to preallocate a connection struct
2222  * in which case there could be two connection structs and cid would be
2223  * non-zero.
2224  */
2225 struct iscsi_cls_conn *
2226 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2227 {
2228         struct iscsi_transport *transport = session->transport;
2229         struct iscsi_cls_conn *conn;
2230         unsigned long flags;
2231         int err;
2232
2233         conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2234         if (!conn)
2235                 return NULL;
2236         if (dd_size)
2237                 conn->dd_data = &conn[1];
2238
2239         mutex_init(&conn->ep_mutex);
2240         INIT_LIST_HEAD(&conn->conn_list);
2241         conn->transport = transport;
2242         conn->cid = cid;
2243
2244         /* this is released in the dev's release function */
2245         if (!get_device(&session->dev))
2246                 goto free_conn;
2247
2248         dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2249         conn->dev.parent = &session->dev;
2250         conn->dev.release = iscsi_conn_release;
2251         err = device_register(&conn->dev);
2252         if (err) {
2253                 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2254                                          "register connection's dev\n");
2255                 goto release_parent_ref;
2256         }
2257         transport_register_device(&conn->dev);
2258
2259         spin_lock_irqsave(&connlock, flags);
2260         list_add(&conn->conn_list, &connlist);
2261         spin_unlock_irqrestore(&connlock, flags);
2262
2263         ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2264         return conn;
2265
2266 release_parent_ref:
2267         put_device(&session->dev);
2268 free_conn:
2269         kfree(conn);
2270         return NULL;
2271 }
2272
2273 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2274
2275 /**
2276  * iscsi_destroy_conn - destroy iscsi class connection
2277  * @conn: iscsi cls session
2278  *
2279  * This can be called from a LLD or iscsi_transport.
2280  */
2281 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2282 {
2283         unsigned long flags;
2284
2285         spin_lock_irqsave(&connlock, flags);
2286         list_del(&conn->conn_list);
2287         spin_unlock_irqrestore(&connlock, flags);
2288
2289         transport_unregister_device(&conn->dev);
2290         ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2291         device_unregister(&conn->dev);
2292         return 0;
2293 }
2294 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2295
2296 /*
2297  * iscsi interface functions
2298  */
2299 static struct iscsi_internal *
2300 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2301 {
2302         struct iscsi_internal *priv;
2303         unsigned long flags;
2304
2305         spin_lock_irqsave(&iscsi_transport_lock, flags);
2306         list_for_each_entry(priv, &iscsi_transports, list) {
2307                 if (tt == priv->iscsi_transport) {
2308                         spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2309                         return priv;
2310                 }
2311         }
2312         spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2313         return NULL;
2314 }
2315
2316 static int
2317 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2318 {
2319         return nlmsg_multicast(nls, skb, 0, group, gfp);
2320 }
2321
2322 static int
2323 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2324 {
2325         return nlmsg_unicast(nls, skb, portid);
2326 }
2327
2328 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2329                    char *data, uint32_t data_size)
2330 {
2331         struct nlmsghdr *nlh;
2332         struct sk_buff *skb;
2333         struct iscsi_uevent *ev;
2334         char *pdu;
2335         struct iscsi_internal *priv;
2336         int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2337                                    data_size);
2338
2339         priv = iscsi_if_transport_lookup(conn->transport);
2340         if (!priv)
2341                 return -EINVAL;
2342
2343         skb = alloc_skb(len, GFP_ATOMIC);
2344         if (!skb) {
2345                 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2346                 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2347                                       "control PDU: OOM\n");
2348                 return -ENOMEM;
2349         }
2350
2351         nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2352         ev = nlmsg_data(nlh);
2353         memset(ev, 0, sizeof(*ev));
2354         ev->transport_handle = iscsi_handle(conn->transport);
2355         ev->type = ISCSI_KEVENT_RECV_PDU;
2356         ev->r.recv_req.cid = conn->cid;
2357         ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2358         pdu = (char*)ev + sizeof(*ev);
2359         memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2360         memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2361
2362         return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2363 }
2364 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2365
2366 int iscsi_offload_mesg(struct Scsi_Host *shost,
2367                        struct iscsi_transport *transport, uint32_t type,
2368                        char *data, uint16_t data_size)
2369 {
2370         struct nlmsghdr *nlh;
2371         struct sk_buff *skb;
2372         struct iscsi_uevent *ev;
2373         int len = nlmsg_total_size(sizeof(*ev) + data_size);
2374
2375         skb = alloc_skb(len, GFP_ATOMIC);
2376         if (!skb) {
2377                 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2378                 return -ENOMEM;
2379         }
2380
2381         nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2382         ev = nlmsg_data(nlh);
2383         memset(ev, 0, sizeof(*ev));
2384         ev->type = type;
2385         ev->transport_handle = iscsi_handle(transport);
2386         switch (type) {
2387         case ISCSI_KEVENT_PATH_REQ:
2388                 ev->r.req_path.host_no = shost->host_no;
2389                 break;
2390         case ISCSI_KEVENT_IF_DOWN:
2391                 ev->r.notify_if_down.host_no = shost->host_no;
2392                 break;
2393         }
2394
2395         memcpy((char *)ev + sizeof(*ev), data, data_size);
2396
2397         return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2398 }
2399 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2400
2401 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2402 {
2403         struct nlmsghdr *nlh;
2404         struct sk_buff  *skb;
2405         struct iscsi_uevent *ev;
2406         struct iscsi_internal *priv;
2407         int len = nlmsg_total_size(sizeof(*ev));
2408
2409         priv = iscsi_if_transport_lookup(conn->transport);
2410         if (!priv)
2411                 return;
2412
2413         skb = alloc_skb(len, GFP_ATOMIC);
2414         if (!skb) {
2415                 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2416                                       "conn error (%d)\n", error);
2417                 return;
2418         }
2419
2420         nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2421         ev = nlmsg_data(nlh);
2422         ev->transport_handle = iscsi_handle(conn->transport);
2423         ev->type = ISCSI_KEVENT_CONN_ERROR;
2424         ev->r.connerror.error = error;
2425         ev->r.connerror.cid = conn->cid;
2426         ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2427
2428         iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2429
2430         iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2431                               error);
2432 }
2433 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2434
2435 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2436                             enum iscsi_conn_state state)
2437 {
2438         struct nlmsghdr *nlh;
2439         struct sk_buff  *skb;
2440         struct iscsi_uevent *ev;
2441         struct iscsi_internal *priv;
2442         int len = nlmsg_total_size(sizeof(*ev));
2443
2444         priv = iscsi_if_transport_lookup(conn->transport);
2445         if (!priv)
2446                 return;
2447
2448         skb = alloc_skb(len, GFP_ATOMIC);
2449         if (!skb) {
2450                 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2451                                       "conn login (%d)\n", state);
2452                 return;
2453         }
2454
2455         nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2456         ev = nlmsg_data(nlh);
2457         ev->transport_handle = iscsi_handle(conn->transport);
2458         ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2459         ev->r.conn_login.state = state;
2460         ev->r.conn_login.cid = conn->cid;
2461         ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2462         iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2463
2464         iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2465                               state);
2466 }
2467 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2468
2469 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2470                            enum iscsi_host_event_code code, uint32_t data_size,
2471                            uint8_t *data)
2472 {
2473         struct nlmsghdr *nlh;
2474         struct sk_buff *skb;
2475         struct iscsi_uevent *ev;
2476         int len = nlmsg_total_size(sizeof(*ev) + data_size);
2477
2478         skb = alloc_skb(len, GFP_NOIO);
2479         if (!skb) {
2480                 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2481                        host_no, code);
2482                 return;
2483         }
2484
2485         nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2486         ev = nlmsg_data(nlh);
2487         ev->transport_handle = iscsi_handle(transport);
2488         ev->type = ISCSI_KEVENT_HOST_EVENT;
2489         ev->r.host_event.host_no = host_no;
2490         ev->r.host_event.code = code;
2491         ev->r.host_event.data_size = data_size;
2492
2493         if (data_size)
2494                 memcpy((char *)ev + sizeof(*ev), data, data_size);
2495
2496         iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2497 }
2498 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2499
2500 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2501                            uint32_t status, uint32_t pid, uint32_t data_size,
2502                            uint8_t *data)
2503 {
2504         struct nlmsghdr *nlh;
2505         struct sk_buff *skb;
2506         struct iscsi_uevent *ev;
2507         int len = nlmsg_total_size(sizeof(*ev) + data_size);
2508
2509         skb = alloc_skb(len, GFP_NOIO);
2510         if (!skb) {
2511                 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2512                 return;
2513         }
2514
2515         nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2516         ev = nlmsg_data(nlh);
2517         ev->transport_handle = iscsi_handle(transport);
2518         ev->type = ISCSI_KEVENT_PING_COMP;
2519         ev->r.ping_comp.host_no = host_no;
2520         ev->r.ping_comp.status = status;
2521         ev->r.ping_comp.pid = pid;
2522         ev->r.ping_comp.data_size = data_size;
2523         memcpy((char *)ev + sizeof(*ev), data, data_size);
2524
2525         iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2526 }
2527 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2528
2529 static int
2530 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2531 {
2532         struct sk_buff  *skb;
2533         struct nlmsghdr *nlh;
2534         int len = nlmsg_total_size(size);
2535
2536         skb = alloc_skb(len, GFP_ATOMIC);
2537         if (!skb) {
2538                 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2539                 return -ENOMEM;
2540         }
2541
2542         nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2543         memcpy(nlmsg_data(nlh), payload, size);
2544         return iscsi_unicast_skb(skb, portid);
2545 }
2546
2547 static int
2548 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2549 {
2550         struct iscsi_uevent *ev = nlmsg_data(nlh);
2551         struct iscsi_stats *stats;
2552         struct sk_buff *skbstat;
2553         struct iscsi_cls_conn *conn;
2554         struct nlmsghdr *nlhstat;
2555         struct iscsi_uevent *evstat;
2556         struct iscsi_internal *priv;
2557         int len = nlmsg_total_size(sizeof(*ev) +
2558                                    sizeof(struct iscsi_stats) +
2559                                    sizeof(struct iscsi_stats_custom) *
2560                                    ISCSI_STATS_CUSTOM_MAX);
2561         int err = 0;
2562
2563         priv = iscsi_if_transport_lookup(transport);
2564         if (!priv)
2565                 return -EINVAL;
2566
2567         conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2568         if (!conn)
2569                 return -EEXIST;
2570
2571         do {
2572                 int actual_size;
2573
2574                 skbstat = alloc_skb(len, GFP_ATOMIC);
2575                 if (!skbstat) {
2576                         iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2577                                               "deliver stats: OOM\n");
2578                         return -ENOMEM;
2579                 }
2580
2581                 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2582                                       (len - sizeof(*nlhstat)), 0);
2583                 evstat = nlmsg_data(nlhstat);
2584                 memset(evstat, 0, sizeof(*evstat));
2585                 evstat->transport_handle = iscsi_handle(conn->transport);
2586                 evstat->type = nlh->nlmsg_type;
2587                 evstat->u.get_stats.cid =
2588                         ev->u.get_stats.cid;
2589                 evstat->u.get_stats.sid =
2590                         ev->u.get_stats.sid;
2591                 stats = (struct iscsi_stats *)
2592                         ((char*)evstat + sizeof(*evstat));
2593                 memset(stats, 0, sizeof(*stats));
2594
2595                 transport->get_stats(conn, stats);
2596                 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2597                                                sizeof(struct iscsi_stats) +
2598                                                sizeof(struct iscsi_stats_custom) *
2599                                                stats->custom_length);
2600                 actual_size -= sizeof(*nlhstat);
2601                 actual_size = nlmsg_msg_size(actual_size);
2602                 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2603                 nlhstat->nlmsg_len = actual_size;
2604
2605                 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2606                                           GFP_ATOMIC);
2607         } while (err < 0 && err != -ECONNREFUSED);
2608
2609         return err;
2610 }
2611
2612 /**
2613  * iscsi_session_event - send session destr. completion event
2614  * @session: iscsi class session
2615  * @event: type of event
2616  */
2617 int iscsi_session_event(struct iscsi_cls_session *session,
2618                         enum iscsi_uevent_e event)
2619 {
2620         struct iscsi_internal *priv;
2621         struct Scsi_Host *shost;
2622         struct iscsi_uevent *ev;
2623         struct sk_buff  *skb;
2624         struct nlmsghdr *nlh;
2625         int rc, len = nlmsg_total_size(sizeof(*ev));
2626
2627         priv = iscsi_if_transport_lookup(session->transport);
2628         if (!priv)
2629                 return -EINVAL;
2630         shost = iscsi_session_to_shost(session);
2631
2632         skb = alloc_skb(len, GFP_KERNEL);
2633         if (!skb) {
2634                 iscsi_cls_session_printk(KERN_ERR, session,
2635                                          "Cannot notify userspace of session "
2636                                          "event %u\n", event);
2637                 return -ENOMEM;
2638         }
2639
2640         nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2641         ev = nlmsg_data(nlh);
2642         ev->transport_handle = iscsi_handle(session->transport);
2643
2644         ev->type = event;
2645         switch (event) {
2646         case ISCSI_KEVENT_DESTROY_SESSION:
2647                 ev->r.d_session.host_no = shost->host_no;
2648                 ev->r.d_session.sid = session->sid;
2649                 break;
2650         case ISCSI_KEVENT_CREATE_SESSION:
2651                 ev->r.c_session_ret.host_no = shost->host_no;
2652                 ev->r.c_session_ret.sid = session->sid;
2653                 break;
2654         case ISCSI_KEVENT_UNBIND_SESSION:
2655                 ev->r.unbind_session.host_no = shost->host_no;
2656                 ev->r.unbind_session.sid = session->sid;
2657                 break;
2658         default:
2659                 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2660                                          "%u.\n", event);
2661                 kfree_skb(skb);
2662                 return -EINVAL;
2663         }
2664
2665         /*
2666          * this will occur if the daemon is not up, so we just warn
2667          * the user and when the daemon is restarted it will handle it
2668          */
2669         rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2670         if (rc == -ESRCH)
2671                 iscsi_cls_session_printk(KERN_ERR, session,
2672                                          "Cannot notify userspace of session "
2673                                          "event %u. Check iscsi daemon\n",
2674                                          event);
2675
2676         ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2677                                 event, rc);
2678         return rc;
2679 }
2680 EXPORT_SYMBOL_GPL(iscsi_session_event);
2681
2682 static int
2683 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2684                         struct iscsi_uevent *ev, pid_t pid,
2685                         uint32_t initial_cmdsn, uint16_t cmds_max,
2686                         uint16_t queue_depth)
2687 {
2688         struct iscsi_transport *transport = priv->iscsi_transport;
2689         struct iscsi_cls_session *session;
2690         struct Scsi_Host *shost;
2691
2692         session = transport->create_session(ep, cmds_max, queue_depth,
2693                                             initial_cmdsn);
2694         if (!session)
2695                 return -ENOMEM;
2696
2697         session->creator = pid;
2698         shost = iscsi_session_to_shost(session);
2699         ev->r.c_session_ret.host_no = shost->host_no;
2700         ev->r.c_session_ret.sid = session->sid;
2701         ISCSI_DBG_TRANS_SESSION(session,
2702                                 "Completed creating transport session\n");
2703         return 0;
2704 }
2705
2706 static int
2707 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2708 {
2709         struct iscsi_cls_conn *conn;
2710         struct iscsi_cls_session *session;
2711
2712         session = iscsi_session_lookup(ev->u.c_conn.sid);
2713         if (!session) {
2714                 printk(KERN_ERR "iscsi: invalid session %d.\n",
2715                        ev->u.c_conn.sid);
2716                 return -EINVAL;
2717         }
2718
2719         conn = transport->create_conn(session, ev->u.c_conn.cid);
2720         if (!conn) {
2721                 iscsi_cls_session_printk(KERN_ERR, session,
2722                                          "couldn't create a new connection.");
2723                 return -ENOMEM;
2724         }
2725
2726         ev->r.c_conn_ret.sid = session->sid;
2727         ev->r.c_conn_ret.cid = conn->cid;
2728
2729         ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2730         return 0;
2731 }
2732
2733 static int
2734 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2735 {
2736         struct iscsi_cls_conn *conn;
2737
2738         conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2739         if (!conn)
2740                 return -EINVAL;
2741
2742         ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2743         if (transport->destroy_conn)
2744                 transport->destroy_conn(conn);
2745
2746         return 0;
2747 }
2748
2749 static int
2750 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2751 {
2752         char *data = (char*)ev + sizeof(*ev);
2753         struct iscsi_cls_conn *conn;
2754         struct iscsi_cls_session *session;
2755         int err = 0, value = 0;
2756
2757         session = iscsi_session_lookup(ev->u.set_param.sid);
2758         conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2759         if (!conn || !session)
2760                 return -EINVAL;
2761
2762         switch (ev->u.set_param.param) {
2763         case ISCSI_PARAM_SESS_RECOVERY_TMO:
2764                 sscanf(data, "%d", &value);
2765                 if (!session->recovery_tmo_sysfs_override)
2766                         session->recovery_tmo = value;
2767                 break;
2768         default:
2769                 err = transport->set_param(conn, ev->u.set_param.param,
2770                                            data, ev->u.set_param.len);
2771         }
2772
2773         return err;
2774 }
2775
2776 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2777                                struct iscsi_uevent *ev, int msg_type)
2778 {
2779         struct iscsi_endpoint *ep;
2780         struct sockaddr *dst_addr;
2781         struct Scsi_Host *shost = NULL;
2782         int non_blocking, err = 0;
2783
2784         if (!transport->ep_connect)
2785                 return -EINVAL;
2786
2787         if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2788                 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2789                 if (!shost) {
2790                         printk(KERN_ERR "ep connect failed. Could not find "
2791                                "host no %u\n",
2792                                ev->u.ep_connect_through_host.host_no);
2793                         return -ENODEV;
2794                 }
2795                 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2796         } else
2797                 non_blocking = ev->u.ep_connect.non_blocking;
2798
2799         dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2800         ep = transport->ep_connect(shost, dst_addr, non_blocking);
2801         if (IS_ERR(ep)) {
2802                 err = PTR_ERR(ep);
2803                 goto release_host;
2804         }
2805
2806         ev->r.ep_connect_ret.handle = ep->id;
2807 release_host:
2808         if (shost)
2809                 scsi_host_put(shost);
2810         return err;
2811 }
2812
2813 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2814                                   u64 ep_handle)
2815 {
2816         struct iscsi_cls_conn *conn;
2817         struct iscsi_endpoint *ep;
2818
2819         if (!transport->ep_disconnect)
2820                 return -EINVAL;
2821
2822         ep = iscsi_lookup_endpoint(ep_handle);
2823         if (!ep)
2824                 return -EINVAL;
2825         conn = ep->conn;
2826         if (conn) {
2827                 mutex_lock(&conn->ep_mutex);
2828                 conn->ep = NULL;
2829                 mutex_unlock(&conn->ep_mutex);
2830         }
2831
2832         transport->ep_disconnect(ep);
2833         return 0;
2834 }
2835
2836 static int
2837 iscsi_if_transport_ep(struct iscsi_transport *transport,
2838                       struct iscsi_uevent *ev, int msg_type)
2839 {
2840         struct iscsi_endpoint *ep;
2841         int rc = 0;
2842
2843         switch (msg_type) {
2844         case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2845         case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2846                 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2847                 break;
2848         case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2849                 if (!transport->ep_poll)
2850                         return -EINVAL;
2851
2852                 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2853                 if (!ep)
2854                         return -EINVAL;
2855
2856                 ev->r.retcode = transport->ep_poll(ep,
2857                                                    ev->u.ep_poll.timeout_ms);
2858                 break;
2859         case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2860                 rc = iscsi_if_ep_disconnect(transport,
2861                                             ev->u.ep_disconnect.ep_handle);
2862                 break;
2863         }
2864         return rc;
2865 }
2866
2867 static int
2868 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2869                 struct iscsi_uevent *ev)
2870 {
2871         struct Scsi_Host *shost;
2872         struct sockaddr *dst_addr;
2873         int err;
2874
2875         if (!transport->tgt_dscvr)
2876                 return -EINVAL;
2877
2878         shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2879         if (!shost) {
2880                 printk(KERN_ERR "target discovery could not find host no %u\n",
2881                        ev->u.tgt_dscvr.host_no);
2882                 return -ENODEV;
2883         }
2884
2885
2886         dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2887         err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2888                                    ev->u.tgt_dscvr.enable, dst_addr);
2889         scsi_host_put(shost);
2890         return err;
2891 }
2892
2893 static int
2894 iscsi_set_host_param(struct iscsi_transport *transport,
2895                      struct iscsi_uevent *ev)
2896 {
2897         char *data = (char*)ev + sizeof(*ev);
2898         struct Scsi_Host *shost;
2899         int err;
2900
2901         if (!transport->set_host_param)
2902                 return -ENOSYS;
2903
2904         shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2905         if (!shost) {
2906                 printk(KERN_ERR "set_host_param could not find host no %u\n",
2907                        ev->u.set_host_param.host_no);
2908                 return -ENODEV;
2909         }
2910
2911         err = transport->set_host_param(shost, ev->u.set_host_param.param,
2912                                         data, ev->u.set_host_param.len);
2913         scsi_host_put(shost);
2914         return err;
2915 }
2916
2917 static int
2918 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2919 {
2920         struct Scsi_Host *shost;
2921         struct iscsi_path *params;
2922         int err;
2923
2924         if (!transport->set_path)
2925                 return -ENOSYS;
2926
2927         shost = scsi_host_lookup(ev->u.set_path.host_no);
2928         if (!shost) {
2929                 printk(KERN_ERR "set path could not find host no %u\n",
2930                        ev->u.set_path.host_no);
2931                 return -ENODEV;
2932         }
2933
2934         params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2935         err = transport->set_path(shost, params);
2936
2937         scsi_host_put(shost);
2938         return err;
2939 }
2940
2941 static int
2942 iscsi_set_iface_params(struct iscsi_transport *transport,
2943                        struct iscsi_uevent *ev, uint32_t len)
2944 {
2945         char *data = (char *)ev + sizeof(*ev);
2946         struct Scsi_Host *shost;
2947         int err;
2948
2949         if (!transport->set_iface_param)
2950                 return -ENOSYS;
2951
2952         shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2953         if (!shost) {
2954                 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2955                        ev->u.set_iface_params.host_no);
2956                 return -ENODEV;
2957         }
2958
2959         err = transport->set_iface_param(shost, data, len);
2960         scsi_host_put(shost);
2961         return err;
2962 }
2963
2964 static int
2965 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2966 {
2967         struct Scsi_Host *shost;
2968         struct sockaddr *dst_addr;
2969         int err;
2970
2971         if (!transport->send_ping)
2972                 return -ENOSYS;
2973
2974         shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
2975         if (!shost) {
2976                 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
2977                        ev->u.iscsi_ping.host_no);
2978                 return -ENODEV;
2979         }
2980
2981         dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
2982         err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
2983                                    ev->u.iscsi_ping.iface_type,
2984                                    ev->u.iscsi_ping.payload_size,
2985                                    ev->u.iscsi_ping.pid,
2986                                    dst_addr);
2987         scsi_host_put(shost);
2988         return err;
2989 }
2990
2991 static int
2992 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2993 {
2994         struct iscsi_uevent *ev = nlmsg_data(nlh);
2995         struct Scsi_Host *shost = NULL;
2996         struct iscsi_chap_rec *chap_rec;
2997         struct iscsi_internal *priv;
2998         struct sk_buff *skbchap;
2999         struct nlmsghdr *nlhchap;
3000         struct iscsi_uevent *evchap;
3001         uint32_t chap_buf_size;
3002         int len, err = 0;
3003         char *buf;
3004
3005         if (!transport->get_chap)
3006                 return -EINVAL;
3007
3008         priv = iscsi_if_transport_lookup(transport);
3009         if (!priv)
3010                 return -EINVAL;
3011
3012         chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3013         len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3014
3015         shost = scsi_host_lookup(ev->u.get_chap.host_no);
3016         if (!shost) {
3017                 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3018                        __func__, ev->u.get_chap.host_no);
3019                 return -ENODEV;
3020         }
3021
3022         do {
3023                 int actual_size;
3024
3025                 skbchap = alloc_skb(len, GFP_KERNEL);
3026                 if (!skbchap) {
3027                         printk(KERN_ERR "can not deliver chap: OOM\n");
3028                         err = -ENOMEM;
3029                         goto exit_get_chap;
3030                 }
3031
3032                 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3033                                       (len - sizeof(*nlhchap)), 0);
3034                 evchap = nlmsg_data(nlhchap);
3035                 memset(evchap, 0, sizeof(*evchap));
3036                 evchap->transport_handle = iscsi_handle(transport);
3037                 evchap->type = nlh->nlmsg_type;
3038                 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3039                 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3040                 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3041                 buf = (char *)evchap + sizeof(*evchap);
3042                 memset(buf, 0, chap_buf_size);
3043
3044                 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3045                                     &evchap->u.get_chap.num_entries, buf);
3046
3047                 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3048                 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3049                 nlhchap->nlmsg_len = actual_size;
3050
3051                 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3052                                           GFP_KERNEL);
3053         } while (err < 0 && err != -ECONNREFUSED);
3054
3055 exit_get_chap:
3056         scsi_host_put(shost);
3057         return err;
3058 }
3059
3060 static int iscsi_set_chap(struct iscsi_transport *transport,
3061                           struct iscsi_uevent *ev, uint32_t len)
3062 {
3063         char *data = (char *)ev + sizeof(*ev);
3064         struct Scsi_Host *shost;
3065         int err = 0;
3066
3067         if (!transport->set_chap)
3068                 return -ENOSYS;
3069
3070         shost = scsi_host_lookup(ev->u.set_path.host_no);
3071         if (!shost) {
3072                 pr_err("%s could not find host no %u\n",
3073                        __func__, ev->u.set_path.host_no);
3074                 return -ENODEV;
3075         }
3076
3077         err = transport->set_chap(shost, data, len);
3078         scsi_host_put(shost);
3079         return err;
3080 }
3081
3082 static int iscsi_delete_chap(struct iscsi_transport *transport,
3083                              struct iscsi_uevent *ev)
3084 {
3085         struct Scsi_Host *shost;
3086         int err = 0;
3087
3088         if (!transport->delete_chap)
3089                 return -ENOSYS;
3090
3091         shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3092         if (!shost) {
3093                 printk(KERN_ERR "%s could not find host no %u\n",
3094                        __func__, ev->u.delete_chap.host_no);
3095                 return -ENODEV;
3096         }
3097
3098         err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3099         scsi_host_put(shost);
3100         return err;
3101 }
3102
3103 static const struct {
3104         enum iscsi_discovery_parent_type value;
3105         char                            *name;
3106 } iscsi_discovery_parent_names[] = {
3107         {ISCSI_DISC_PARENT_UNKNOWN,     "Unknown" },
3108         {ISCSI_DISC_PARENT_SENDTGT,     "Sendtarget" },
3109         {ISCSI_DISC_PARENT_ISNS,        "isns" },
3110 };
3111
3112 char *iscsi_get_discovery_parent_name(int parent_type)
3113 {
3114         int i;
3115         char *state = "Unknown!";
3116
3117         for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3118                 if (iscsi_discovery_parent_names[i].value & parent_type) {
3119                         state = iscsi_discovery_parent_names[i].name;
3120                         break;
3121                 }
3122         }
3123         return state;
3124 }
3125 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3126
3127 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3128                                      struct iscsi_uevent *ev, uint32_t len)
3129 {
3130         char *data = (char *)ev + sizeof(*ev);
3131         struct Scsi_Host *shost;
3132         struct iscsi_bus_flash_session *fnode_sess;
3133         struct iscsi_bus_flash_conn *fnode_conn;
3134         struct device *dev;
3135         uint32_t idx;
3136         int err = 0;
3137
3138         if (!transport->set_flashnode_param) {
3139                 err = -ENOSYS;
3140                 goto exit_set_fnode;
3141         }
3142
3143         shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3144         if (!shost) {
3145                 pr_err("%s could not find host no %u\n",
3146                        __func__, ev->u.set_flashnode.host_no);
3147                 err = -ENODEV;
3148                 goto put_host;
3149         }
3150
3151         idx = ev->u.set_flashnode.flashnode_idx;
3152         fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3153         if (!fnode_sess) {
3154                 pr_err("%s could not find flashnode %u for host no %u\n",
3155                        __func__, idx, ev->u.set_flashnode.host_no);
3156                 err = -ENODEV;
3157                 goto put_host;
3158         }
3159
3160         dev = iscsi_find_flashnode_conn(fnode_sess);
3161         if (!dev) {
3162                 err = -ENODEV;
3163                 goto put_sess;
3164         }
3165
3166         fnode_conn = iscsi_dev_to_flash_conn(dev);
3167         err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3168         put_device(dev);
3169
3170 put_sess:
3171         put_device(&fnode_sess->dev);
3172
3173 put_host:
3174         scsi_host_put(shost);
3175
3176 exit_set_fnode:
3177         return err;
3178 }
3179
3180 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3181                                struct iscsi_uevent *ev, uint32_t len)
3182 {
3183         char *data = (char *)ev + sizeof(*ev);
3184         struct Scsi_Host *shost;
3185         int index;
3186         int err = 0;
3187
3188         if (!transport->new_flashnode) {
3189                 err = -ENOSYS;
3190                 goto exit_new_fnode;
3191         }
3192
3193         shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3194         if (!shost) {
3195                 pr_err("%s could not find host no %u\n",
3196                        __func__, ev->u.new_flashnode.host_no);
3197                 err = -ENODEV;
3198                 goto put_host;
3199         }
3200
3201         index = transport->new_flashnode(shost, data, len);
3202
3203         if (index >= 0)
3204                 ev->r.new_flashnode_ret.flashnode_idx = index;
3205         else
3206                 err = -EIO;
3207
3208 put_host:
3209         scsi_host_put(shost);
3210
3211 exit_new_fnode:
3212         return err;
3213 }
3214
3215 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3216                                struct iscsi_uevent *ev)
3217 {
3218         struct Scsi_Host *shost;
3219         struct iscsi_bus_flash_session *fnode_sess;
3220         uint32_t idx;
3221         int err = 0;
3222
3223         if (!transport->del_flashnode) {
3224                 err = -ENOSYS;
3225                 goto exit_del_fnode;
3226         }
3227
3228         shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3229         if (!shost) {
3230                 pr_err("%s could not find host no %u\n",
3231                        __func__, ev->u.del_flashnode.host_no);
3232                 err = -ENODEV;
3233                 goto put_host;
3234         }
3235
3236         idx = ev->u.del_flashnode.flashnode_idx;
3237         fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3238         if (!fnode_sess) {
3239                 pr_err("%s could not find flashnode %u for host no %u\n",
3240                        __func__, idx, ev->u.del_flashnode.host_no);
3241                 err = -ENODEV;
3242                 goto put_host;
3243         }
3244
3245         err = transport->del_flashnode(fnode_sess);
3246         put_device(&fnode_sess->dev);
3247
3248 put_host:
3249         scsi_host_put(shost);
3250
3251 exit_del_fnode:
3252         return err;
3253 }
3254
3255 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3256                                  struct iscsi_uevent *ev)
3257 {
3258         struct Scsi_Host *shost;
3259         struct iscsi_bus_flash_session *fnode_sess;
3260         struct iscsi_bus_flash_conn *fnode_conn;
3261         struct device *dev;
3262         uint32_t idx;
3263         int err = 0;
3264
3265         if (!transport->login_flashnode) {
3266                 err = -ENOSYS;
3267                 goto exit_login_fnode;
3268         }
3269
3270         shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3271         if (!shost) {
3272                 pr_err("%s could not find host no %u\n",
3273                        __func__, ev->u.login_flashnode.host_no);
3274                 err = -ENODEV;
3275                 goto put_host;
3276         }
3277
3278         idx = ev->u.login_flashnode.flashnode_idx;
3279         fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3280         if (!fnode_sess) {
3281                 pr_err("%s could not find flashnode %u for host no %u\n",
3282                        __func__, idx, ev->u.login_flashnode.host_no);
3283                 err = -ENODEV;
3284                 goto put_host;
3285         }
3286
3287         dev = iscsi_find_flashnode_conn(fnode_sess);
3288         if (!dev) {
3289                 err = -ENODEV;
3290                 goto put_sess;
3291         }
3292
3293         fnode_conn = iscsi_dev_to_flash_conn(dev);
3294         err = transport->login_flashnode(fnode_sess, fnode_conn);
3295         put_device(dev);
3296
3297 put_sess:
3298         put_device(&fnode_sess->dev);
3299
3300 put_host:
3301         scsi_host_put(shost);
3302
3303 exit_login_fnode:
3304         return err;
3305 }
3306
3307 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3308                                   struct iscsi_uevent *ev)
3309 {
3310         struct Scsi_Host *shost;
3311         struct iscsi_bus_flash_session *fnode_sess;
3312         struct iscsi_bus_flash_conn *fnode_conn;
3313         struct device *dev;
3314         uint32_t idx;
3315         int err = 0;
3316
3317         if (!transport->logout_flashnode) {
3318                 err = -ENOSYS;
3319                 goto exit_logout_fnode;
3320         }
3321
3322         shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3323         if (!shost) {
3324                 pr_err("%s could not find host no %u\n",
3325                        __func__, ev->u.logout_flashnode.host_no);
3326                 err = -ENODEV;
3327                 goto put_host;
3328         }
3329
3330         idx = ev->u.logout_flashnode.flashnode_idx;
3331         fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3332         if (!fnode_sess) {
3333                 pr_err("%s could not find flashnode %u for host no %u\n",
3334                        __func__, idx, ev->u.logout_flashnode.host_no);
3335                 err = -ENODEV;
3336                 goto put_host;
3337         }
3338
3339         dev = iscsi_find_flashnode_conn(fnode_sess);
3340         if (!dev) {
3341                 err = -ENODEV;
3342                 goto put_sess;
3343         }
3344
3345         fnode_conn = iscsi_dev_to_flash_conn(dev);
3346
3347         err = transport->logout_flashnode(fnode_sess, fnode_conn);
3348         put_device(dev);
3349
3350 put_sess:
3351         put_device(&fnode_sess->dev);
3352
3353 put_host:
3354         scsi_host_put(shost);
3355
3356 exit_logout_fnode:
3357         return err;
3358 }
3359
3360 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3361                                       struct iscsi_uevent *ev)
3362 {
3363         struct Scsi_Host *shost;
3364         struct iscsi_cls_session *session;
3365         int err = 0;
3366
3367         if (!transport->logout_flashnode_sid) {
3368                 err = -ENOSYS;
3369                 goto exit_logout_sid;
3370         }
3371
3372         shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3373         if (!shost) {
3374                 pr_err("%s could not find host no %u\n",
3375                        __func__, ev->u.logout_flashnode.host_no);
3376                 err = -ENODEV;
3377                 goto put_host;
3378         }
3379
3380         session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3381         if (!session) {
3382                 pr_err("%s could not find session id %u\n",
3383                        __func__, ev->u.logout_flashnode_sid.sid);
3384                 err = -EINVAL;
3385                 goto put_host;
3386         }
3387
3388         err = transport->logout_flashnode_sid(session);
3389
3390 put_host:
3391         scsi_host_put(shost);
3392
3393 exit_logout_sid:
3394         return err;
3395 }
3396
3397 static int
3398 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3399 {
3400         struct iscsi_uevent *ev = nlmsg_data(nlh);
3401         struct Scsi_Host *shost = NULL;
3402         struct iscsi_internal *priv;
3403         struct sk_buff *skbhost_stats;
3404         struct nlmsghdr *nlhhost_stats;
3405         struct iscsi_uevent *evhost_stats;
3406         int host_stats_size = 0;
3407         int len, err = 0;
3408         char *buf;
3409
3410         if (!transport->get_host_stats)
3411                 return -ENOSYS;
3412
3413         priv = iscsi_if_transport_lookup(transport);
3414         if (!priv)
3415                 return -EINVAL;
3416
3417         host_stats_size = sizeof(struct iscsi_offload_host_stats);
3418         len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3419
3420         shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3421         if (!shost) {
3422                 pr_err("%s: failed. Could not find host no %u\n",
3423                        __func__, ev->u.get_host_stats.host_no);
3424                 return -ENODEV;
3425         }
3426
3427         do {
3428                 int actual_size;
3429
3430                 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3431                 if (!skbhost_stats) {
3432                         pr_err("cannot deliver host stats: OOM\n");
3433                         err = -ENOMEM;
3434                         goto exit_host_stats;
3435                 }
3436
3437                 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3438                                       (len - sizeof(*nlhhost_stats)), 0);
3439                 evhost_stats = nlmsg_data(nlhhost_stats);
3440                 memset(evhost_stats, 0, sizeof(*evhost_stats));
3441                 evhost_stats->transport_handle = iscsi_handle(transport);
3442                 evhost_stats->type = nlh->nlmsg_type;
3443                 evhost_stats->u.get_host_stats.host_no =
3444                                         ev->u.get_host_stats.host_no;
3445                 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3446                 memset(buf, 0, host_stats_size);
3447
3448                 err = transport->get_host_stats(shost, buf, host_stats_size);
3449                 if (err) {
3450                         kfree_skb(skbhost_stats);
3451                         goto exit_host_stats;
3452                 }
3453
3454                 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3455                 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3456                 nlhhost_stats->nlmsg_len = actual_size;
3457
3458                 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3459                                           GFP_KERNEL);
3460         } while (err < 0 && err != -ECONNREFUSED);
3461
3462 exit_host_stats:
3463         scsi_host_put(shost);
3464         return err;
3465 }
3466
3467
3468 static int
3469 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3470 {
3471         int err = 0;
3472         u32 portid;
3473         struct iscsi_uevent *ev = nlmsg_data(nlh);
3474         struct iscsi_transport *transport = NULL;
3475         struct iscsi_internal *priv;
3476         struct iscsi_cls_session *session;
3477         struct iscsi_cls_conn *conn;
3478         struct iscsi_endpoint *ep = NULL;
3479
3480         if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3481                 *group = ISCSI_NL_GRP_UIP;
3482         else
3483                 *group = ISCSI_NL_GRP_ISCSID;
3484
3485         priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3486         if (!priv)
3487                 return -EINVAL;
3488         transport = priv->iscsi_transport;
3489
3490         if (!try_module_get(transport->owner))
3491                 return -EINVAL;
3492
3493         portid = NETLINK_CB(skb).portid;
3494
3495         switch (nlh->nlmsg_type) {
3496         case ISCSI_UEVENT_CREATE_SESSION:
3497                 err = iscsi_if_create_session(priv, ep, ev,
3498                                               portid,
3499                                               ev->u.c_session.initial_cmdsn,
3500                                               ev->u.c_session.cmds_max,
3501                                               ev->u.c_session.queue_depth);
3502                 break;
3503         case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3504                 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3505                 if (!ep) {
3506                         err = -EINVAL;
3507                         break;
3508                 }
3509
3510                 err = iscsi_if_create_session(priv, ep, ev,
3511                                         portid,
3512                                         ev->u.c_bound_session.initial_cmdsn,
3513                                         ev->u.c_bound_session.cmds_max,
3514                                         ev->u.c_bound_session.queue_depth);
3515                 break;
3516         case ISCSI_UEVENT_DESTROY_SESSION:
3517                 session = iscsi_session_lookup(ev->u.d_session.sid);
3518                 if (session)
3519                         transport->destroy_session(session);
3520                 else
3521                         err = -EINVAL;
3522                 break;
3523         case ISCSI_UEVENT_UNBIND_SESSION:
3524                 session = iscsi_session_lookup(ev->u.d_session.sid);
3525                 if (session)
3526                         scsi_queue_work(iscsi_session_to_shost(session),
3527                                         &session->unbind_work);
3528                 else
3529                         err = -EINVAL;
3530                 break;
3531         case ISCSI_UEVENT_CREATE_CONN:
3532                 err = iscsi_if_create_conn(transport, ev);
3533                 break;
3534         case ISCSI_UEVENT_DESTROY_CONN:
3535                 err = iscsi_if_destroy_conn(transport, ev);
3536                 break;
3537         case ISCSI_UEVENT_BIND_CONN:
3538                 session = iscsi_session_lookup(ev->u.b_conn.sid);
3539                 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3540
3541                 if (conn && conn->ep)
3542                         iscsi_if_ep_disconnect(transport, conn->ep->id);
3543
3544                 if (!session || !conn) {
3545                         err = -EINVAL;
3546                         break;
3547                 }
3548
3549                 ev->r.retcode = transport->bind_conn(session, conn,
3550                                                 ev->u.b_conn.transport_eph,
3551                                                 ev->u.b_conn.is_leading);
3552                 if (ev->r.retcode || !transport->ep_connect)
3553                         break;
3554
3555                 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3556                 if (ep) {
3557                         ep->conn = conn;
3558
3559                         mutex_lock(&conn->ep_mutex);
3560                         conn->ep = ep;
3561                         mutex_unlock(&conn->ep_mutex);
3562                 } else
3563                         iscsi_cls_conn_printk(KERN_ERR, conn,
3564                                               "Could not set ep conn "
3565                                               "binding\n");
3566                 break;
3567         case ISCSI_UEVENT_SET_PARAM:
3568                 err = iscsi_set_param(transport, ev);
3569                 break;
3570         case ISCSI_UEVENT_START_CONN:
3571                 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3572                 if (conn)
3573                         ev->r.retcode = transport->start_conn(conn);
3574                 else
3575                         err = -EINVAL;
3576                 break;
3577         case ISCSI_UEVENT_STOP_CONN:
3578                 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3579                 if (conn)
3580                         transport->stop_conn(conn, ev->u.stop_conn.flag);
3581                 else
3582                         err = -EINVAL;
3583                 break;
3584         case ISCSI_UEVENT_SEND_PDU:
3585                 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3586                 if (conn)
3587                         ev->r.retcode = transport->send_pdu(conn,
3588                                 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3589                                 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3590                                 ev->u.send_pdu.data_size);
3591                 else
3592                         err = -EINVAL;
3593                 break;
3594         case ISCSI_UEVENT_GET_STATS:
3595                 err = iscsi_if_get_stats(transport, nlh);
3596                 break;
3597         case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3598         case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3599         case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3600         case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3601                 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3602                 break;
3603         case ISCSI_UEVENT_TGT_DSCVR:
3604                 err = iscsi_tgt_dscvr(transport, ev);
3605                 break;
3606         case ISCSI_UEVENT_SET_HOST_PARAM:
3607                 err = iscsi_set_host_param(transport, ev);
3608                 break;
3609         case ISCSI_UEVENT_PATH_UPDATE:
3610                 err = iscsi_set_path(transport, ev);
3611                 break;
3612         case ISCSI_UEVENT_SET_IFACE_PARAMS:
3613                 err = iscsi_set_iface_params(transport, ev,
3614                                              nlmsg_attrlen(nlh, sizeof(*ev)));
3615                 break;
3616         case ISCSI_UEVENT_PING:
3617                 err = iscsi_send_ping(transport, ev);
3618                 break;
3619         case ISCSI_UEVENT_GET_CHAP:
3620                 err = iscsi_get_chap(transport, nlh);
3621                 break;
3622         case ISCSI_UEVENT_DELETE_CHAP:
3623                 err = iscsi_delete_chap(transport, ev);
3624                 break;
3625         case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3626                 err = iscsi_set_flashnode_param(transport, ev,
3627                                                 nlmsg_attrlen(nlh,
3628                                                               sizeof(*ev)));
3629                 break;
3630         case ISCSI_UEVENT_NEW_FLASHNODE:
3631                 err = iscsi_new_flashnode(transport, ev,
3632                                           nlmsg_attrlen(nlh, sizeof(*ev)));
3633                 break;
3634         case ISCSI_UEVENT_DEL_FLASHNODE:
3635                 err = iscsi_del_flashnode(transport, ev);
3636                 break;
3637         case ISCSI_UEVENT_LOGIN_FLASHNODE:
3638                 err = iscsi_login_flashnode(transport, ev);
3639                 break;
3640         case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3641                 err = iscsi_logout_flashnode(transport, ev);
3642                 break;
3643         case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3644                 err = iscsi_logout_flashnode_sid(transport, ev);
3645                 break;
3646         case ISCSI_UEVENT_SET_CHAP:
3647                 err = iscsi_set_chap(transport, ev,
3648                                      nlmsg_attrlen(nlh, sizeof(*ev)));
3649                 break;
3650         case ISCSI_UEVENT_GET_HOST_STATS:
3651                 err = iscsi_get_host_stats(transport, nlh);
3652                 break;
3653         default:
3654                 err = -ENOSYS;
3655                 break;
3656         }
3657
3658         module_put(transport->owner);
3659         return err;
3660 }
3661
3662 /*
3663  * Get message from skb.  Each message is processed by iscsi_if_recv_msg.
3664  * Malformed skbs with wrong lengths or invalid creds are not processed.
3665  */
3666 static void
3667 iscsi_if_rx(struct sk_buff *skb)
3668 {
3669         u32 portid = NETLINK_CB(skb).portid;
3670
3671         mutex_lock(&rx_queue_mutex);
3672         while (skb->len >= NLMSG_HDRLEN) {
3673                 int err;
3674                 uint32_t rlen;
3675                 struct nlmsghdr *nlh;
3676                 struct iscsi_uevent *ev;
3677                 uint32_t group;
3678
3679                 nlh = nlmsg_hdr(skb);
3680                 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3681                     skb->len < nlh->nlmsg_len) {
3682                         break;
3683                 }
3684
3685                 ev = nlmsg_data(nlh);
3686                 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3687                 if (rlen > skb->len)
3688                         rlen = skb->len;
3689
3690                 err = iscsi_if_recv_msg(skb, nlh, &group);
3691                 if (err) {
3692                         ev->type = ISCSI_KEVENT_IF_ERROR;
3693                         ev->iferror = err;
3694                 }
3695                 do {
3696                         /*
3697                          * special case for GET_STATS:
3698                          * on success - sending reply and stats from
3699                          * inside of if_recv_msg(),
3700                          * on error - fall through.
3701                          */
3702                         if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3703                                 break;
3704                         if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3705                                 break;
3706                         err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3707                                                   ev, sizeof(*ev));
3708                 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3709                 skb_pull(skb, rlen);
3710         }
3711         mutex_unlock(&rx_queue_mutex);
3712 }
3713
3714 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store)              \
3715 struct device_attribute dev_attr_##_prefix##_##_name =  \
3716         __ATTR(_name,_mode,_show,_store)
3717
3718 /*
3719  * iSCSI connection attrs
3720  */
3721 #define iscsi_conn_attr_show(param)                                     \
3722 static ssize_t                                                          \
3723 show_conn_param_##param(struct device *dev,                             \
3724                         struct device_attribute *attr, char *buf)       \
3725 {                                                                       \
3726         struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);   \
3727         struct iscsi_transport *t = conn->transport;                    \
3728         return t->get_conn_param(conn, param, buf);                     \
3729 }
3730
3731 #define iscsi_conn_attr(field, param)                                   \
3732         iscsi_conn_attr_show(param)                                     \
3733 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param,  \
3734                         NULL);
3735
3736 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3737 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3738 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3739 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3740 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3741 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3742 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3743 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3744 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3745 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3746 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3747 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3748 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3749 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3750 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3751 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3752 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3753 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3754 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3755 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3756 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3757 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3758 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3759 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3760 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3761 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3762 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3763 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3764
3765
3766 #define iscsi_conn_ep_attr_show(param)                                  \
3767 static ssize_t show_conn_ep_param_##param(struct device *dev,           \
3768                                           struct device_attribute *attr,\
3769                                           char *buf)                    \
3770 {                                                                       \
3771         struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);   \
3772         struct iscsi_transport *t = conn->transport;                    \
3773         struct iscsi_endpoint *ep;                                      \
3774         ssize_t rc;                                                     \
3775                                                                         \
3776         /*                                                              \
3777          * Need to make sure ep_disconnect does not free the LLD's      \
3778          * interconnect resources while we are trying to read them.     \
3779          */                                                             \
3780         mutex_lock(&conn->ep_mutex);                                    \
3781         ep = conn->ep;                                                  \
3782         if (!ep && t->ep_connect) {                                     \
3783                 mutex_unlock(&conn->ep_mutex);                          \
3784                 return -ENOTCONN;                                       \
3785         }                                                               \
3786                                                                         \
3787         if (ep)                                                         \
3788                 rc = t->get_ep_param(ep, param, buf);                   \
3789         else                                                            \
3790                 rc = t->get_conn_param(conn, param, buf);               \
3791         mutex_unlock(&conn->ep_mutex);                                  \
3792         return rc;                                                      \
3793 }
3794
3795 #define iscsi_conn_ep_attr(field, param)                                \
3796         iscsi_conn_ep_attr_show(param)                                  \
3797 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO,                           \
3798                         show_conn_ep_param_##param, NULL);
3799
3800 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3801 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3802
3803 static struct attribute *iscsi_conn_attrs[] = {
3804         &dev_attr_conn_max_recv_dlength.attr,
3805         &dev_attr_conn_max_xmit_dlength.attr,
3806         &dev_attr_conn_header_digest.attr,
3807         &dev_attr_conn_data_digest.attr,
3808         &dev_attr_conn_ifmarker.attr,
3809         &dev_attr_conn_ofmarker.attr,
3810         &dev_attr_conn_address.attr,
3811         &dev_attr_conn_port.attr,
3812         &dev_attr_conn_exp_statsn.attr,
3813         &dev_attr_conn_persistent_address.attr,
3814         &dev_attr_conn_persistent_port.attr,
3815         &dev_attr_conn_ping_tmo.attr,
3816         &dev_attr_conn_recv_tmo.attr,
3817         &dev_attr_conn_local_port.attr,
3818         &dev_attr_conn_statsn.attr,
3819         &dev_attr_conn_keepalive_tmo.attr,
3820         &dev_attr_conn_max_segment_size.attr,
3821         &dev_attr_conn_tcp_timestamp_stat.attr,
3822         &dev_attr_conn_tcp_wsf_disable.attr,
3823         &dev_attr_conn_tcp_nagle_disable.attr,
3824         &dev_attr_conn_tcp_timer_scale.attr,
3825         &dev_attr_conn_tcp_timestamp_enable.attr,
3826         &dev_attr_conn_fragment_disable.attr,
3827         &dev_attr_conn_ipv4_tos.attr,
3828         &dev_attr_conn_ipv6_traffic_class.attr,
3829         &dev_attr_conn_ipv6_flow_label.attr,
3830         &dev_attr_conn_is_fw_assigned_ipv6.attr,
3831         &dev_attr_conn_tcp_xmit_wsf.attr,
3832         &dev_attr_conn_tcp_recv_wsf.attr,
3833         &dev_attr_conn_local_ipaddr.attr,
3834         NULL,
3835 };
3836
3837 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3838                                          struct attribute *attr, int i)
3839 {
3840         struct device *cdev = container_of(kobj, struct device, kobj);
3841         struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3842         struct iscsi_transport *t = conn->transport;
3843         int param;
3844
3845         if (attr == &dev_attr_conn_max_recv_dlength.attr)
3846                 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3847         else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3848                 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3849         else if (attr == &dev_attr_conn_header_digest.attr)
3850                 param = ISCSI_PARAM_HDRDGST_EN;
3851         else if (attr == &dev_attr_conn_data_digest.attr)
3852                 param = ISCSI_PARAM_DATADGST_EN;
3853         else if (attr == &dev_attr_conn_ifmarker.attr)
3854                 param = ISCSI_PARAM_IFMARKER_EN;
3855         else if (attr == &dev_attr_conn_ofmarker.attr)
3856                 param = ISCSI_PARAM_OFMARKER_EN;
3857         else if (attr == &dev_attr_conn_address.attr)
3858                 param = ISCSI_PARAM_CONN_ADDRESS;
3859         else if (attr == &dev_attr_conn_port.attr)
3860                 param = ISCSI_PARAM_CONN_PORT;
3861         else if (attr == &dev_attr_conn_exp_statsn.attr)
3862                 param = ISCSI_PARAM_EXP_STATSN;
3863         else if (attr == &dev_attr_conn_persistent_address.attr)
3864                 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3865         else if (attr == &dev_attr_conn_persistent_port.attr)
3866                 param = ISCSI_PARAM_PERSISTENT_PORT;
3867         else if (attr == &dev_attr_conn_ping_tmo.attr)
3868                 param = ISCSI_PARAM_PING_TMO;
3869         else if (attr == &dev_attr_conn_recv_tmo.attr)
3870                 param = ISCSI_PARAM_RECV_TMO;
3871         else if (attr == &dev_attr_conn_local_port.attr)
3872                 param = ISCSI_PARAM_LOCAL_PORT;
3873         else if (attr == &dev_attr_conn_statsn.attr)
3874                 param = ISCSI_PARAM_STATSN;
3875         else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3876                 param = ISCSI_PARAM_KEEPALIVE_TMO;
3877         else if (attr == &dev_attr_conn_max_segment_size.attr)
3878                 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3879         else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3880                 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3881         else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3882                 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3883         else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3884                 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3885         else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3886                 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3887         else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3888                 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3889         else if (attr == &dev_attr_conn_fragment_disable.attr)
3890                 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3891         else if (attr == &dev_attr_conn_ipv4_tos.attr)
3892                 param = ISCSI_PARAM_IPV4_TOS;
3893         else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3894                 param = ISCSI_PARAM_IPV6_TC;
3895         else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3896                 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3897         else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3898                 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3899         else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3900                 param = ISCSI_PARAM_TCP_XMIT_WSF;
3901         else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3902                 param = ISCSI_PARAM_TCP_RECV_WSF;
3903         else if (attr == &dev_attr_conn_local_ipaddr.attr)
3904                 param = ISCSI_PARAM_LOCAL_IPADDR;
3905         else {
3906                 WARN_ONCE(1, "Invalid conn attr");
3907                 return 0;
3908         }
3909
3910         return t->attr_is_visible(ISCSI_PARAM, param);
3911 }
3912
3913 static struct attribute_group iscsi_conn_group = {
3914         .attrs = iscsi_conn_attrs,
3915         .is_visible = iscsi_conn_attr_is_visible,
3916 };
3917
3918 /*
3919  * iSCSI session attrs
3920  */
3921 #define iscsi_session_attr_show(param, perm)                            \
3922 static ssize_t                                                          \
3923 show_session_param_##param(struct device *dev,                          \
3924                            struct device_attribute *attr, char *buf)    \
3925 {                                                                       \
3926         struct iscsi_cls_session *session =                             \
3927                 iscsi_dev_to_session(dev->parent);                      \
3928         struct iscsi_transport *t = session->transport;                 \
3929                                                                         \
3930         if (perm && !capable(CAP_SYS_ADMIN))                            \
3931                 return -EACCES;                                         \
3932         return t->get_session_param(session, param, buf);               \
3933 }
3934
3935 #define iscsi_session_attr(field, param, perm)                          \
3936         iscsi_session_attr_show(param, perm)                            \
3937 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3938                         NULL);
3939 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3940 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3941 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3942 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3943 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3944 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3945 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3946 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3947 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3948 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3949 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3950 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3951 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3952 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
3953 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3954 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
3955 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3956 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3957 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3958 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
3959 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3960 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3961 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3962 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3963 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3964 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
3965 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
3966 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
3967 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
3968 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
3969 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
3970 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
3971 iscsi_session_attr(discovery_auth_optional,
3972                    ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
3973 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
3974 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
3975 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
3976 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
3977 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
3978 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
3979 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
3980
3981 static ssize_t
3982 show_priv_session_state(struct device *dev, struct device_attribute *attr,
3983                         char *buf)
3984 {
3985         struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
3986         return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
3987 }
3988 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
3989                         NULL);
3990 static ssize_t
3991 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
3992                         char *buf)
3993 {
3994         struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
3995         return sprintf(buf, "%d\n", session->creator);
3996 }
3997 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
3998                         NULL);
3999 static ssize_t
4000 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4001                             char *buf)
4002 {
4003         struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4004         return sprintf(buf, "%d\n", session->target_id);
4005 }
4006 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4007                         show_priv_session_target_id, NULL);
4008
4009 #define iscsi_priv_session_attr_show(field, format)                     \
4010 static ssize_t                                                          \
4011 show_priv_session_##field(struct device *dev,                           \
4012                           struct device_attribute *attr, char *buf)     \
4013 {                                                                       \
4014         struct iscsi_cls_session *session =                             \
4015                         iscsi_dev_to_session(dev->parent);              \
4016         if (session->field == -1)                                       \
4017                 return sprintf(buf, "off\n");                           \
4018         return sprintf(buf, format"\n", session->field);                \
4019 }
4020
4021 #define iscsi_priv_session_attr_store(field)                            \
4022 static ssize_t                                                          \
4023 store_priv_session_##field(struct device *dev,                          \
4024                            struct device_attribute *attr,               \
4025                            const char *buf, size_t count)               \
4026 {                                                                       \
4027         int val;                                                        \
4028         char *cp;                                                       \
4029         struct iscsi_cls_session *session =                             \
4030                 iscsi_dev_to_session(dev->parent);                      \
4031         if ((session->state == ISCSI_SESSION_FREE) ||                   \
4032             (session->state == ISCSI_SESSION_FAILED))                   \
4033                 return -EBUSY;                                          \
4034         if (strncmp(buf, "off", 3) == 0) {                              \
4035                 session->field = -1;                                    \
4036                 session->field##_sysfs_override = true;                 \
4037         } else {                                                        \
4038                 val = simple_strtoul(buf, &cp, 0);                      \
4039                 if (*cp != '\0' && *cp != '\n')                         \
4040                         return -EINVAL;                                 \
4041                 session->field = val;                                   \
4042                 session->field##_sysfs_override = true;                 \
4043         }                                                               \
4044         return count;                                                   \
4045 }
4046
4047 #define iscsi_priv_session_rw_attr(field, format)                       \
4048         iscsi_priv_session_attr_show(field, format)                     \
4049         iscsi_priv_session_attr_store(field)                            \
4050 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR,            \
4051                         show_priv_session_##field,                      \
4052                         store_priv_session_##field)
4053
4054 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4055
4056 static struct attribute *iscsi_session_attrs[] = {
4057         &dev_attr_sess_initial_r2t.attr,
4058         &dev_attr_sess_max_outstanding_r2t.attr,
4059         &dev_attr_sess_immediate_data.attr,
4060         &dev_attr_sess_first_burst_len.attr,
4061         &dev_attr_sess_max_burst_len.attr,
4062         &dev_attr_sess_data_pdu_in_order.attr,
4063         &dev_attr_sess_data_seq_in_order.attr,
4064         &dev_attr_sess_erl.attr,
4065         &dev_attr_sess_targetname.attr,
4066         &dev_attr_sess_tpgt.attr,
4067         &dev_attr_sess_password.attr,
4068         &dev_attr_sess_password_in.attr,
4069         &dev_attr_sess_username.attr,
4070         &dev_attr_sess_username_in.attr,
4071         &dev_attr_sess_fast_abort.attr,
4072         &dev_attr_sess_abort_tmo.attr,
4073         &dev_attr_sess_lu_reset_tmo.attr,
4074         &dev_attr_sess_tgt_reset_tmo.attr,
4075         &dev_attr_sess_ifacename.attr,
4076         &dev_attr_sess_initiatorname.attr,
4077         &dev_attr_sess_targetalias.attr,
4078         &dev_attr_sess_boot_root.attr,
4079         &dev_attr_sess_boot_nic.attr,
4080         &dev_attr_sess_boot_target.attr,
4081         &dev_attr_priv_sess_recovery_tmo.attr,
4082         &dev_attr_priv_sess_state.attr,
4083         &dev_attr_priv_sess_creator.attr,
4084         &dev_attr_sess_chap_out_idx.attr,
4085         &dev_attr_sess_chap_in_idx.attr,
4086         &dev_attr_priv_sess_target_id.attr,
4087         &dev_attr_sess_auto_snd_tgt_disable.attr,
4088         &dev_attr_sess_discovery_session.attr,
4089         &dev_attr_sess_portal_type.attr,
4090         &dev_attr_sess_chap_auth.attr,
4091         &dev_attr_sess_discovery_logout.attr,
4092         &dev_attr_sess_bidi_chap.attr,
4093         &dev_attr_sess_discovery_auth_optional.attr,
4094         &dev_attr_sess_def_time2wait.attr,
4095         &dev_attr_sess_def_time2retain.attr,
4096         &dev_attr_sess_isid.attr,
4097         &dev_attr_sess_tsid.attr,
4098         &dev_attr_sess_def_taskmgmt_tmo.attr,
4099         &dev_attr_sess_discovery_parent_idx.attr,
4100         &dev_attr_sess_discovery_parent_type.attr,
4101         NULL,
4102 };
4103
4104 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4105                                             struct attribute *attr, int i)
4106 {
4107         struct device *cdev = container_of(kobj, struct device, kobj);
4108         struct iscsi_cls_session *session = transport_class_to_session(cdev);
4109         struct iscsi_transport *t = session->transport;
4110         int param;
4111
4112         if (attr == &dev_attr_sess_initial_r2t.attr)
4113                 param = ISCSI_PARAM_INITIAL_R2T_EN;
4114         else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4115                 param = ISCSI_PARAM_MAX_R2T;
4116         else if (attr == &dev_attr_sess_immediate_data.attr)
4117                 param = ISCSI_PARAM_IMM_DATA_EN;
4118         else if (attr == &dev_attr_sess_first_burst_len.attr)
4119                 param = ISCSI_PARAM_FIRST_BURST;
4120         else if (attr == &dev_attr_sess_max_burst_len.attr)
4121                 param = ISCSI_PARAM_MAX_BURST;
4122         else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4123                 param = ISCSI_PARAM_PDU_INORDER_EN;
4124         else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4125                 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4126         else if (attr == &dev_attr_sess_erl.attr)
4127                 param = ISCSI_PARAM_ERL;
4128         else if (attr == &dev_attr_sess_targetname.attr)
4129                 param = ISCSI_PARAM_TARGET_NAME;
4130         else if (attr == &dev_attr_sess_tpgt.attr)
4131                 param = ISCSI_PARAM_TPGT;
4132         else if (attr == &dev_attr_sess_chap_in_idx.attr)
4133                 param = ISCSI_PARAM_CHAP_IN_IDX;
4134         else if (attr == &dev_attr_sess_chap_out_idx.attr)
4135                 param = ISCSI_PARAM_CHAP_OUT_IDX;
4136         else if (attr == &dev_attr_sess_password.attr)
4137                 param = ISCSI_PARAM_USERNAME;
4138         else if (attr == &dev_attr_sess_password_in.attr)
4139                 param = ISCSI_PARAM_USERNAME_IN;
4140         else if (attr == &dev_attr_sess_username.attr)
4141                 param = ISCSI_PARAM_PASSWORD;
4142         else if (attr == &dev_attr_sess_username_in.attr)
4143                 param = ISCSI_PARAM_PASSWORD_IN;
4144         else if (attr == &dev_attr_sess_fast_abort.attr)
4145                 param = ISCSI_PARAM_FAST_ABORT;
4146         else if (attr == &dev_attr_sess_abort_tmo.attr)
4147                 param = ISCSI_PARAM_ABORT_TMO;
4148         else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4149                 param = ISCSI_PARAM_LU_RESET_TMO;
4150         else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4151                 param = ISCSI_PARAM_TGT_RESET_TMO;
4152         else if (attr == &dev_attr_sess_ifacename.attr)
4153                 param = ISCSI_PARAM_IFACE_NAME;
4154         else if (attr == &dev_attr_sess_initiatorname.attr)
4155                 param = ISCSI_PARAM_INITIATOR_NAME;
4156         else if (attr == &dev_attr_sess_targetalias.attr)
4157                 param = ISCSI_PARAM_TARGET_ALIAS;
4158         else if (attr == &dev_attr_sess_boot_root.attr)
4159                 param = ISCSI_PARAM_BOOT_ROOT;
4160         else if (attr == &dev_attr_sess_boot_nic.attr)
4161                 param = ISCSI_PARAM_BOOT_NIC;
4162         else if (attr == &dev_attr_sess_boot_target.attr)
4163                 param = ISCSI_PARAM_BOOT_TARGET;
4164         else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4165                 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4166         else if (attr == &dev_attr_sess_discovery_session.attr)
4167                 param = ISCSI_PARAM_DISCOVERY_SESS;
4168         else if (attr == &dev_attr_sess_portal_type.attr)
4169                 param = ISCSI_PARAM_PORTAL_TYPE;
4170         else if (attr == &dev_attr_sess_chap_auth.attr)
4171                 param = ISCSI_PARAM_CHAP_AUTH_EN;
4172         else if (attr == &dev_attr_sess_discovery_logout.attr)
4173                 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4174         else if (attr == &dev_attr_sess_bidi_chap.attr)
4175                 param = ISCSI_PARAM_BIDI_CHAP_EN;
4176         else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4177                 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4178         else if (attr == &dev_attr_sess_def_time2wait.attr)
4179                 param = ISCSI_PARAM_DEF_TIME2WAIT;
4180         else if (attr == &dev_attr_sess_def_time2retain.attr)
4181                 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4182         else if (attr == &dev_attr_sess_isid.attr)
4183                 param = ISCSI_PARAM_ISID;
4184         else if (attr == &dev_attr_sess_tsid.attr)
4185                 param = ISCSI_PARAM_TSID;
4186         else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4187                 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4188         else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4189                 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4190         else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4191                 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4192         else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4193                 return S_IRUGO | S_IWUSR;
4194         else if (attr == &dev_attr_priv_sess_state.attr)
4195                 return S_IRUGO;
4196         else if (attr == &dev_attr_priv_sess_creator.attr)
4197                 return S_IRUGO;
4198         else if (attr == &dev_attr_priv_sess_target_id.attr)
4199                 return S_IRUGO;
4200         else {
4201                 WARN_ONCE(1, "Invalid session attr");
4202                 return 0;
4203         }
4204
4205         return t->attr_is_visible(ISCSI_PARAM, param);
4206 }
4207
4208 static struct attribute_group iscsi_session_group = {
4209         .attrs = iscsi_session_attrs,
4210         .is_visible = iscsi_session_attr_is_visible,
4211 };
4212
4213 /*
4214  * iSCSI host attrs
4215  */
4216 #define iscsi_host_attr_show(param)                                     \
4217 static ssize_t                                                          \
4218 show_host_param_##param(struct device *dev,                             \
4219                         struct device_attribute *attr, char *buf)       \
4220 {                                                                       \
4221         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
4222         struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4223         return priv->iscsi_transport->get_host_param(shost, param, buf); \
4224 }
4225
4226 #define iscsi_host_attr(field, param)                                   \
4227         iscsi_host_attr_show(param)                                     \
4228 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param,  \
4229                         NULL);
4230
4231 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4232 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4233 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4234 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4235 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4236 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4237
4238 static struct attribute *iscsi_host_attrs[] = {
4239         &dev_attr_host_netdev.attr,
4240         &dev_attr_host_hwaddress.attr,
4241         &dev_attr_host_ipaddress.attr,
4242         &dev_attr_host_initiatorname.attr,
4243         &dev_attr_host_port_state.attr,
4244         &dev_attr_host_port_speed.attr,
4245         NULL,
4246 };
4247
4248 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4249                                          struct attribute *attr, int i)
4250 {
4251         struct device *cdev = container_of(kobj, struct device, kobj);
4252         struct Scsi_Host *shost = transport_class_to_shost(cdev);
4253         struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4254         int param;
4255
4256         if (attr == &dev_attr_host_netdev.attr)
4257                 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4258         else if (attr == &dev_attr_host_hwaddress.attr)
4259                 param = ISCSI_HOST_PARAM_HWADDRESS;
4260         else if (attr == &dev_attr_host_ipaddress.attr)
4261                 param = ISCSI_HOST_PARAM_IPADDRESS;
4262         else if (attr == &dev_attr_host_initiatorname.attr)
4263                 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4264         else if (attr == &dev_attr_host_port_state.attr)
4265                 param = ISCSI_HOST_PARAM_PORT_STATE;
4266         else if (attr == &dev_attr_host_port_speed.attr)
4267                 param = ISCSI_HOST_PARAM_PORT_SPEED;
4268         else {
4269                 WARN_ONCE(1, "Invalid host attr");
4270                 return 0;
4271         }
4272
4273         return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4274 }
4275
4276 static struct attribute_group iscsi_host_group = {
4277         .attrs = iscsi_host_attrs,
4278         .is_visible = iscsi_host_attr_is_visible,
4279 };
4280
4281 /* convert iscsi_port_speed values to ascii string name */
4282 static const struct {
4283         enum iscsi_port_speed   value;
4284         char                    *name;
4285 } iscsi_port_speed_names[] = {
4286         {ISCSI_PORT_SPEED_UNKNOWN,      "Unknown" },
4287         {ISCSI_PORT_SPEED_10MBPS,       "10 Mbps" },
4288         {ISCSI_PORT_SPEED_100MBPS,      "100 Mbps" },
4289         {ISCSI_PORT_SPEED_1GBPS,        "1 Gbps" },
4290         {ISCSI_PORT_SPEED_10GBPS,       "10 Gbps" },
4291         {ISCSI_PORT_SPEED_25GBPS,       "25 Gbps" },
4292         {ISCSI_PORT_SPEED_40GBPS,       "40 Gbps" },
4293 };
4294
4295 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4296 {
4297         int i;
4298         char *speed = "Unknown!";
4299         struct iscsi_cls_host *ihost = shost->shost_data;
4300         uint32_t port_speed = ihost->port_speed;
4301
4302         for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4303                 if (iscsi_port_speed_names[i].value & port_speed) {
4304                         speed = iscsi_port_speed_names[i].name;
4305                         break;
4306                 }
4307         }
4308         return speed;
4309 }
4310 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4311
4312 /* convert iscsi_port_state values to ascii string name */
4313 static const struct {
4314         enum iscsi_port_state   value;
4315         char                    *name;
4316 } iscsi_port_state_names[] = {
4317         {ISCSI_PORT_STATE_DOWN,         "LINK DOWN" },
4318         {ISCSI_PORT_STATE_UP,           "LINK UP" },
4319 };
4320
4321 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4322 {
4323         int i;
4324         char *state = "Unknown!";
4325         struct iscsi_cls_host *ihost = shost->shost_data;
4326         uint32_t port_state = ihost->port_state;
4327
4328         for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4329                 if (iscsi_port_state_names[i].value & port_state) {
4330                         state = iscsi_port_state_names[i].name;
4331                         break;
4332                 }
4333         }
4334         return state;
4335 }
4336 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4337
4338 static int iscsi_session_match(struct attribute_container *cont,
4339                            struct device *dev)
4340 {
4341         struct iscsi_cls_session *session;
4342         struct Scsi_Host *shost;
4343         struct iscsi_internal *priv;
4344
4345         if (!iscsi_is_session_dev(dev))
4346                 return 0;
4347
4348         session = iscsi_dev_to_session(dev);
4349         shost = iscsi_session_to_shost(session);
4350         if (!shost->transportt)
4351                 return 0;
4352
4353         priv = to_iscsi_internal(shost->transportt);
4354         if (priv->session_cont.ac.class != &iscsi_session_class.class)
4355                 return 0;
4356
4357         return &priv->session_cont.ac == cont;
4358 }
4359
4360 static int iscsi_conn_match(struct attribute_container *cont,
4361                            struct device *dev)
4362 {
4363         struct iscsi_cls_session *session;
4364         struct iscsi_cls_conn *conn;
4365         struct Scsi_Host *shost;
4366         struct iscsi_internal *priv;
4367
4368         if (!iscsi_is_conn_dev(dev))
4369                 return 0;
4370
4371         conn = iscsi_dev_to_conn(dev);
4372         session = iscsi_dev_to_session(conn->dev.parent);
4373         shost = iscsi_session_to_shost(session);
4374
4375         if (!shost->transportt)
4376                 return 0;
4377
4378         priv = to_iscsi_internal(shost->transportt);
4379         if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4380                 return 0;
4381
4382         return &priv->conn_cont.ac == cont;
4383 }
4384
4385 static int iscsi_host_match(struct attribute_container *cont,
4386                             struct device *dev)
4387 {
4388         struct Scsi_Host *shost;
4389         struct iscsi_internal *priv;
4390
4391         if (!scsi_is_host_device(dev))
4392                 return 0;
4393
4394         shost = dev_to_shost(dev);
4395         if (!shost->transportt  ||
4396             shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4397                 return 0;
4398
4399         priv = to_iscsi_internal(shost->transportt);
4400         return &priv->t.host_attrs.ac == cont;
4401 }
4402
4403 struct scsi_transport_template *
4404 iscsi_register_transport(struct iscsi_transport *tt)
4405 {
4406         struct iscsi_internal *priv;
4407         unsigned long flags;
4408         int err;
4409
4410         BUG_ON(!tt);
4411
4412         priv = iscsi_if_transport_lookup(tt);
4413         if (priv)
4414                 return NULL;
4415
4416         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4417         if (!priv)
4418                 return NULL;
4419         INIT_LIST_HEAD(&priv->list);
4420         priv->iscsi_transport = tt;
4421         priv->t.user_scan = iscsi_user_scan;
4422         priv->t.create_work_queue = 1;
4423
4424         priv->dev.class = &iscsi_transport_class;
4425         dev_set_name(&priv->dev, "%s", tt->name);
4426         err = device_register(&priv->dev);
4427         if (err)
4428                 goto free_priv;
4429
4430         err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4431         if (err)
4432                 goto unregister_dev;
4433
4434         /* host parameters */
4435         priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4436         priv->t.host_attrs.ac.match = iscsi_host_match;
4437         priv->t.host_attrs.ac.grp = &iscsi_host_group;
4438         priv->t.host_size = sizeof(struct iscsi_cls_host);
4439         transport_container_register(&priv->t.host_attrs);
4440
4441         /* connection parameters */
4442         priv->conn_cont.ac.class = &iscsi_connection_class.class;
4443         priv->conn_cont.ac.match = iscsi_conn_match;
4444         priv->conn_cont.ac.grp = &iscsi_conn_group;
4445         transport_container_register(&priv->conn_cont);
4446
4447         /* session parameters */
4448         priv->session_cont.ac.class = &iscsi_session_class.class;
4449         priv->session_cont.ac.match = iscsi_session_match;
4450         priv->session_cont.ac.grp = &iscsi_session_group;
4451         transport_container_register(&priv->session_cont);
4452
4453         spin_lock_irqsave(&iscsi_transport_lock, flags);
4454         list_add(&priv->list, &iscsi_transports);
4455         spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4456
4457         printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4458         return &priv->t;
4459
4460 unregister_dev:
4461         device_unregister(&priv->dev);
4462         return NULL;
4463 free_priv:
4464         kfree(priv);
4465         return NULL;
4466 }
4467 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4468
4469 int iscsi_unregister_transport(struct iscsi_transport *tt)
4470 {
4471         struct iscsi_internal *priv;
4472         unsigned long flags;
4473
4474         BUG_ON(!tt);
4475
4476         mutex_lock(&rx_queue_mutex);
4477
4478         priv = iscsi_if_transport_lookup(tt);
4479         BUG_ON (!priv);
4480
4481         spin_lock_irqsave(&iscsi_transport_lock, flags);
4482         list_del(&priv->list);
4483         spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4484
4485         transport_container_unregister(&priv->conn_cont);
4486         transport_container_unregister(&priv->session_cont);
4487         transport_container_unregister(&priv->t.host_attrs);
4488
4489         sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4490         device_unregister(&priv->dev);
4491         mutex_unlock(&rx_queue_mutex);
4492
4493         return 0;
4494 }
4495 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4496
4497 static __init int iscsi_transport_init(void)
4498 {
4499         int err;
4500         struct netlink_kernel_cfg cfg = {
4501                 .groups = 1,
4502                 .input  = iscsi_if_rx,
4503         };
4504         printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4505                 ISCSI_TRANSPORT_VERSION);
4506
4507         atomic_set(&iscsi_session_nr, 0);
4508
4509         err = class_register(&iscsi_transport_class);
4510         if (err)
4511                 return err;
4512
4513         err = class_register(&iscsi_endpoint_class);
4514         if (err)
4515                 goto unregister_transport_class;
4516
4517         err = class_register(&iscsi_iface_class);
4518         if (err)
4519                 goto unregister_endpoint_class;
4520
4521         err = transport_class_register(&iscsi_host_class);
4522         if (err)
4523                 goto unregister_iface_class;
4524
4525         err = transport_class_register(&iscsi_connection_class);
4526         if (err)
4527                 goto unregister_host_class;
4528
4529         err = transport_class_register(&iscsi_session_class);
4530         if (err)
4531                 goto unregister_conn_class;
4532
4533         err = bus_register(&iscsi_flashnode_bus);
4534         if (err)
4535                 goto unregister_session_class;
4536
4537         nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4538         if (!nls) {
4539                 err = -ENOBUFS;
4540                 goto unregister_flashnode_bus;
4541         }
4542
4543         iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4544         if (!iscsi_eh_timer_workq) {
4545                 err = -ENOMEM;
4546                 goto release_nls;
4547         }
4548
4549         return 0;
4550
4551 release_nls:
4552         netlink_kernel_release(nls);
4553 unregister_flashnode_bus:
4554         bus_unregister(&iscsi_flashnode_bus);
4555 unregister_session_class:
4556         transport_class_unregister(&iscsi_session_class);
4557 unregister_conn_class:
4558         transport_class_unregister(&iscsi_connection_class);
4559 unregister_host_class:
4560         transport_class_unregister(&iscsi_host_class);
4561 unregister_iface_class:
4562         class_unregister(&iscsi_iface_class);
4563 unregister_endpoint_class:
4564         class_unregister(&iscsi_endpoint_class);
4565 unregister_transport_class:
4566         class_unregister(&iscsi_transport_class);
4567         return err;
4568 }
4569
4570 static void __exit iscsi_transport_exit(void)
4571 {
4572         destroy_workqueue(iscsi_eh_timer_workq);
4573         netlink_kernel_release(nls);
4574         bus_unregister(&iscsi_flashnode_bus);
4575         transport_class_unregister(&iscsi_connection_class);
4576         transport_class_unregister(&iscsi_session_class);
4577         transport_class_unregister(&iscsi_host_class);
4578         class_unregister(&iscsi_endpoint_class);
4579         class_unregister(&iscsi_iface_class);
4580         class_unregister(&iscsi_transport_class);
4581 }
4582
4583 module_init(iscsi_transport_init);
4584 module_exit(iscsi_transport_exit);
4585
4586 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4587               "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4588               "Alex Aizman <itn780@yahoo.com>");
4589 MODULE_DESCRIPTION("iSCSI Transport Interface");
4590 MODULE_LICENSE("GPL");
4591 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4592 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);