drivers/target/iscsi/iscsi_target_configfs.c

   1 /*******************************************************************************
   2  * This file contains the configfs implementation for iSCSI Target mode
   3  * from the LIO-Target Project.
   4  *
   5  * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
   6  *
   7  * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
   8  *
   9  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  ****************************************************************************/
  21
  22 #include <linux/configfs.h>
  23 #include <linux/export.h>
  24 #include <linux/inet.h>
  25 #include <target/target_core_base.h>
  26 #include <target/target_core_fabric.h>
  27 #include <target/target_core_fabric_configfs.h>
  28 #include <target/target_core_configfs.h>
  29 #include <target/configfs_macros.h>
  30
  31 #include "iscsi_target_core.h"
  32 #include "iscsi_target_parameters.h"
  33 #include "iscsi_target_device.h"
  34 #include "iscsi_target_erl0.h"
  35 #include "iscsi_target_nodeattrib.h"
  36 #include "iscsi_target_tpg.h"
  37 #include "iscsi_target_util.h"
  38 #include "iscsi_target.h"
  39 #include "iscsi_target_stat.h"
  40 #include "iscsi_target_configfs.h"
  41
  42 struct target_fabric_configfs *lio_target_fabric_configfs;
  43
  44 struct lio_target_configfs_attribute {
  45         struct configfs_attribute attr;
  46         ssize_t (*show)(void *, char *);
  47         ssize_t (*store)(void *, const char *, size_t);
  48 };
  49
  50 struct iscsi_portal_group *lio_get_tpg_from_tpg_item(
  51         struct config_item *item,
  52         struct iscsi_tiqn **tiqn_out)
  53 {
  54         struct se_portal_group *se_tpg = container_of(to_config_group(item),
  55                                         struct se_portal_group, tpg_group);
  56         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
  57         int ret;
  58
  59         if (!tpg) {
  60                 pr_err("Unable to locate struct iscsi_portal_group "
  61                         "pointer\n");
  62                 return NULL;
  63         }
  64         ret = iscsit_get_tpg(tpg);
  65         if (ret < 0)
  66                 return NULL;
  67
  68         *tiqn_out = tpg->tpg_tiqn;
  69         return tpg;
  70 }
  71
  72 /* Start items for lio_target_portal_cit */
  73
  74 static ssize_t lio_target_np_show_sctp(
  75         struct se_tpg_np *se_tpg_np,
  76         char *page)
  77 {
  78         struct iscsi_tpg_np *tpg_np = container_of(se_tpg_np,
  79                                 struct iscsi_tpg_np, se_tpg_np);
  80         struct iscsi_tpg_np *tpg_np_sctp;
  81         ssize_t rb;
  82
  83         tpg_np_sctp = iscsit_tpg_locate_child_np(tpg_np, ISCSI_SCTP_TCP);
  84         if (tpg_np_sctp)
  85                 rb = sprintf(page, "1\n");
  86         else
  87                 rb = sprintf(page, "0\n");
  88
  89         return rb;
  90 }
  91
  92 static ssize_t lio_target_np_store_sctp(
  93         struct se_tpg_np *se_tpg_np,
  94         const char *page,
  95         size_t count)
  96 {
  97         struct iscsi_np *np;
  98         struct iscsi_portal_group *tpg;
  99         struct iscsi_tpg_np *tpg_np = container_of(se_tpg_np,
 100                                 struct iscsi_tpg_np, se_tpg_np);
 101         struct iscsi_tpg_np *tpg_np_sctp = NULL;
 102         char *endptr;
 103         u32 op;
 104         int ret;
 105
 106         op = simple_strtoul(page, &endptr, 0);
 107         if ((op != 1) && (op != 0)) {
 108                 pr_err("Illegal value for tpg_enable: %u\n", op);
 109                 return -EINVAL;
 110         }
 111         np = tpg_np->tpg_np;
 112         if (!np) {
 113                 pr_err("Unable to locate struct iscsi_np from"
 114                                 " struct iscsi_tpg_np\n");
 115                 return -EINVAL;
 116         }
 117
 118         tpg = tpg_np->tpg;
 119         if (iscsit_get_tpg(tpg) < 0)
 120                 return -EINVAL;
 121
 122         if (op) {
 123                 /*
 124                  * Use existing np->np_sockaddr for SCTP network portal reference
 125                  */
 126                 tpg_np_sctp = iscsit_tpg_add_network_portal(tpg, &np->np_sockaddr,
 127                                         np->np_ip, tpg_np, ISCSI_SCTP_TCP);
 128                 if (!tpg_np_sctp || IS_ERR(tpg_np_sctp))
 129                         goto out;
 130         } else {
 131                 tpg_np_sctp = iscsit_tpg_locate_child_np(tpg_np, ISCSI_SCTP_TCP);
 132                 if (!tpg_np_sctp)
 133                         goto out;
 134
 135                 ret = iscsit_tpg_del_network_portal(tpg, tpg_np_sctp);
 136                 if (ret < 0)
 137                         goto out;
 138         }
 139
 140         iscsit_put_tpg(tpg);
 141         return count;
 142 out:
 143         iscsit_put_tpg(tpg);
 144         return -EINVAL;
 145 }
 146
 147 TF_NP_BASE_ATTR(lio_target, sctp, S_IRUGO | S_IWUSR);
 148
 149 static struct configfs_attribute *lio_target_portal_attrs[] = {
 150         &lio_target_np_sctp.attr,
 151         NULL,
 152 };
 153
 154 /* Stop items for lio_target_portal_cit */
 155
 156 /* Start items for lio_target_np_cit */
 157
 158 #define MAX_PORTAL_LEN          256
 159
 160 struct se_tpg_np *lio_target_call_addnptotpg(
 161         struct se_portal_group *se_tpg,
 162         struct config_group *group,
 163         const char *name)
 164 {
 165         struct iscsi_portal_group *tpg;
 166         struct iscsi_tpg_np *tpg_np;
 167         char *str, *str2, *ip_str, *port_str;
 168         struct __kernel_sockaddr_storage sockaddr;
 169         struct sockaddr_in *sock_in;
 170         struct sockaddr_in6 *sock_in6;
 171         unsigned long port;
 172         int ret;
 173         char buf[MAX_PORTAL_LEN + 1];
 174
 175         if (strlen(name) > MAX_PORTAL_LEN) {
 176                 pr_err("strlen(name): %d exceeds MAX_PORTAL_LEN: %d\n",
 177                         (int)strlen(name), MAX_PORTAL_LEN);
 178                 return ERR_PTR(-EOVERFLOW);
 179         }
 180         memset(buf, 0, MAX_PORTAL_LEN + 1);
 181         snprintf(buf, MAX_PORTAL_LEN + 1, "%s", name);
 182
 183         memset(&sockaddr, 0, sizeof(struct __kernel_sockaddr_storage));
 184
 185         str = strstr(buf, "[");
 186         if (str) {
 187                 const char *end;
 188
 189                 str2 = strstr(str, "]");
 190                 if (!str2) {
 191                         pr_err("Unable to locate trailing \"]\""
 192                                 " in IPv6 iSCSI network portal address\n");
 193                         return ERR_PTR(-EINVAL);
 194                 }
 195                 str++; /* Skip over leading "[" */
 196                 *str2 = '\0'; /* Terminate the IPv6 address */
 197                 str2++; /* Skip over the "]" */
 198                 port_str = strstr(str2, ":");
 199                 if (!port_str) {
 200                         pr_err("Unable to locate \":port\""
 201                                 " in IPv6 iSCSI network portal address\n");
 202                         return ERR_PTR(-EINVAL);
 203                 }
 204                 *port_str = '\0'; /* Terminate string for IP */
 205                 port_str++; /* Skip over ":" */
 206
 207                 ret = strict_strtoul(port_str, 0, &port);
 208                 if (ret < 0) {
 209                         pr_err("strict_strtoul() failed for port_str: %d\n", ret);
 210                         return ERR_PTR(ret);
 211                 }
 212                 sock_in6 = (struct sockaddr_in6 *)&sockaddr;
 213                 sock_in6->sin6_family = AF_INET6;
 214                 sock_in6->sin6_port = htons((unsigned short)port);
 215                 ret = in6_pton(str, IPV6_ADDRESS_SPACE,
 216                                 (void *)&sock_in6->sin6_addr.in6_u, -1, &end);
 217                 if (ret <= 0) {
 218                         pr_err("in6_pton returned: %d\n", ret);
 219                         return ERR_PTR(-EINVAL);
 220                 }
 221         } else {
 222                 str = ip_str = &buf[0];
 223                 port_str = strstr(ip_str, ":");
 224                 if (!port_str) {
 225                         pr_err("Unable to locate \":port\""
 226                                 " in IPv4 iSCSI network portal address\n");
 227                         return ERR_PTR(-EINVAL);
 228                 }
 229                 *port_str = '\0'; /* Terminate string for IP */
 230                 port_str++; /* Skip over ":" */
 231
 232                 ret = strict_strtoul(port_str, 0, &port);
 233                 if (ret < 0) {
 234                         pr_err("strict_strtoul() failed for port_str: %d\n", ret);
 235                         return ERR_PTR(ret);
 236                 }
 237                 sock_in = (struct sockaddr_in *)&sockaddr;
 238                 sock_in->sin_family = AF_INET;
 239                 sock_in->sin_port = htons((unsigned short)port);
 240                 sock_in->sin_addr.s_addr = in_aton(ip_str);
 241         }
 242         tpg = container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
 243         ret = iscsit_get_tpg(tpg);
 244         if (ret < 0)
 245                 return ERR_PTR(-EINVAL);
 246
 247         pr_debug("LIO_Target_ConfigFS: REGISTER -> %s TPGT: %hu"
 248                 " PORTAL: %s\n",
 249                 config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
 250                 tpg->tpgt, name);
 251         /*
 252          * Assume ISCSI_TCP by default.  Other network portals for other
 253          * iSCSI fabrics:
 254          *
 255          * Traditional iSCSI over SCTP (initial support)
 256          * iSER/TCP (TODO, hardware available)
 257          * iSER/SCTP (TODO, software emulation with osc-iwarp)
 258          * iSER/IB (TODO, hardware available)
 259          *
 260          * can be enabled with atributes under
 261          * sys/kernel/config/iscsi/$IQN/$TPG/np/$IP:$PORT/
 262          *
 263          */
 264         tpg_np = iscsit_tpg_add_network_portal(tpg, &sockaddr, str, NULL,
 265                                 ISCSI_TCP);
 266         if (IS_ERR(tpg_np)) {
 267                 iscsit_put_tpg(tpg);
 268                 return ERR_CAST(tpg_np);
 269         }
 270         pr_debug("LIO_Target_ConfigFS: addnptotpg done!\n");
 271
 272         iscsit_put_tpg(tpg);
 273         return &tpg_np->se_tpg_np;
 274 }
 275
 276 static void lio_target_call_delnpfromtpg(
 277         struct se_tpg_np *se_tpg_np)
 278 {
 279         struct iscsi_portal_group *tpg;
 280         struct iscsi_tpg_np *tpg_np;
 281         struct se_portal_group *se_tpg;
 282         int ret;
 283
 284         tpg_np = container_of(se_tpg_np, struct iscsi_tpg_np, se_tpg_np);
 285         tpg = tpg_np->tpg;
 286         ret = iscsit_get_tpg(tpg);
 287         if (ret < 0)
 288                 return;
 289
 290         se_tpg = &tpg->tpg_se_tpg;
 291         pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s TPGT: %hu"
 292                 " PORTAL: %s:%hu\n", config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
 293                 tpg->tpgt, tpg_np->tpg_np->np_ip, tpg_np->tpg_np->np_port);
 294
 295         ret = iscsit_tpg_del_network_portal(tpg, tpg_np);
 296         if (ret < 0)
 297                 goto out;
 298
 299         pr_debug("LIO_Target_ConfigFS: delnpfromtpg done!\n");
 300 out:
 301         iscsit_put_tpg(tpg);
 302 }
 303
 304 /* End items for lio_target_np_cit */
 305
 306 /* Start items for lio_target_nacl_attrib_cit */
 307
 308 #define DEF_NACL_ATTRIB(name)                                           \
 309 static ssize_t iscsi_nacl_attrib_show_##name(                           \
 310         struct se_node_acl *se_nacl,                                    \
 311         char *page)                                                     \
 312 {                                                                       \
 313         struct iscsi_node_acl *nacl = container_of(se_nacl, struct iscsi_node_acl, \
 314                                         se_node_acl);                   \
 315                                                                         \
 316         return sprintf(page, "%u\n", ISCSI_NODE_ATTRIB(nacl)->name);    \
 317 }                                                                       \
 318                                                                         \
 319 static ssize_t iscsi_nacl_attrib_store_##name(                          \
 320         struct se_node_acl *se_nacl,                                    \
 321         const char *page,                                               \
 322         size_t count)                                                   \
 323 {                                                                       \
 324         struct iscsi_node_acl *nacl = container_of(se_nacl, struct iscsi_node_acl, \
 325                                         se_node_acl);                   \
 326         char *endptr;                                                   \
 327         u32 val;                                                        \
 328         int ret;                                                        \
 329                                                                         \
 330         val = simple_strtoul(page, &endptr, 0);                         \
 331         ret = iscsit_na_##name(nacl, val);                              \
 332         if (ret < 0)                                                    \
 333                 return ret;                                             \
 334                                                                         \
 335         return count;                                                   \
 336 }
 337
 338 #define NACL_ATTR(_name, _mode) TF_NACL_ATTRIB_ATTR(iscsi, _name, _mode);
 339 /*
 340  * Define iscsi_node_attrib_s_dataout_timeout
 341  */
 342 DEF_NACL_ATTRIB(dataout_timeout);
 343 NACL_ATTR(dataout_timeout, S_IRUGO | S_IWUSR);
 344 /*
 345  * Define iscsi_node_attrib_s_dataout_timeout_retries
 346  */
 347 DEF_NACL_ATTRIB(dataout_timeout_retries);
 348 NACL_ATTR(dataout_timeout_retries, S_IRUGO | S_IWUSR);
 349 /*
 350  * Define iscsi_node_attrib_s_default_erl
 351  */
 352 DEF_NACL_ATTRIB(default_erl);
 353 NACL_ATTR(default_erl, S_IRUGO | S_IWUSR);
 354 /*
 355  * Define iscsi_node_attrib_s_nopin_timeout
 356  */
 357 DEF_NACL_ATTRIB(nopin_timeout);
 358 NACL_ATTR(nopin_timeout, S_IRUGO | S_IWUSR);
 359 /*
 360  * Define iscsi_node_attrib_s_nopin_response_timeout
 361  */
 362 DEF_NACL_ATTRIB(nopin_response_timeout);
 363 NACL_ATTR(nopin_response_timeout, S_IRUGO | S_IWUSR);
 364 /*
 365  * Define iscsi_node_attrib_s_random_datain_pdu_offsets
 366  */
 367 DEF_NACL_ATTRIB(random_datain_pdu_offsets);
 368 NACL_ATTR(random_datain_pdu_offsets, S_IRUGO | S_IWUSR);
 369 /*
 370  * Define iscsi_node_attrib_s_random_datain_seq_offsets
 371  */
 372 DEF_NACL_ATTRIB(random_datain_seq_offsets);
 373 NACL_ATTR(random_datain_seq_offsets, S_IRUGO | S_IWUSR);
 374 /*
 375  * Define iscsi_node_attrib_s_random_r2t_offsets
 376  */
 377 DEF_NACL_ATTRIB(random_r2t_offsets);
 378 NACL_ATTR(random_r2t_offsets, S_IRUGO | S_IWUSR);
 379
 380 static struct configfs_attribute *lio_target_nacl_attrib_attrs[] = {
 381         &iscsi_nacl_attrib_dataout_timeout.attr,
 382         &iscsi_nacl_attrib_dataout_timeout_retries.attr,
 383         &iscsi_nacl_attrib_default_erl.attr,
 384         &iscsi_nacl_attrib_nopin_timeout.attr,
 385         &iscsi_nacl_attrib_nopin_response_timeout.attr,
 386         &iscsi_nacl_attrib_random_datain_pdu_offsets.attr,
 387         &iscsi_nacl_attrib_random_datain_seq_offsets.attr,
 388         &iscsi_nacl_attrib_random_r2t_offsets.attr,
 389         NULL,
 390 };
 391
 392 /* End items for lio_target_nacl_attrib_cit */
 393
 394 /* Start items for lio_target_nacl_auth_cit */
 395
 396 #define __DEF_NACL_AUTH_STR(prefix, name, flags)                        \
 397 static ssize_t __iscsi_##prefix##_show_##name(                          \
 398         struct iscsi_node_acl *nacl,                                    \
 399         char *page)                                                     \
 400 {                                                                       \
 401         struct iscsi_node_auth *auth = &nacl->node_auth;                \
 402                                                                         \
 403         if (!capable(CAP_SYS_ADMIN))                                    \
 404                 return -EPERM;                                          \
 405         return snprintf(page, PAGE_SIZE, "%s\n", auth->name);           \
 406 }                                                                       \
 407                                                                         \
 408 static ssize_t __iscsi_##prefix##_store_##name(                         \
 409         struct iscsi_node_acl *nacl,                                    \
 410         const char *page,                                               \
 411         size_t count)                                                   \
 412 {                                                                       \
 413         struct iscsi_node_auth *auth = &nacl->node_auth;                \
 414                                                                         \
 415         if (!capable(CAP_SYS_ADMIN))                                    \
 416                 return -EPERM;                                          \
 417                                                                         \
 418         snprintf(auth->name, PAGE_SIZE, "%s", page);                    \
 419         if (!strncmp("NULL", auth->name, 4))                            \
 420                 auth->naf_flags &= ~flags;                              \
 421         else                                                            \
 422                 auth->naf_flags |= flags;                               \
 423                                                                         \
 424         if ((auth->naf_flags & NAF_USERID_IN_SET) &&                    \
 425             (auth->naf_flags & NAF_PASSWORD_IN_SET))                    \
 426                 auth->authenticate_target = 1;                          \
 427         else                                                            \
 428                 auth->authenticate_target = 0;                          \
 429                                                                         \
 430         return count;                                                   \
 431 }
 432
 433 #define __DEF_NACL_AUTH_INT(prefix, name)                               \
 434 static ssize_t __iscsi_##prefix##_show_##name(                          \
 435         struct iscsi_node_acl *nacl,                                    \
 436         char *page)                                                     \
 437 {                                                                       \
 438         struct iscsi_node_auth *auth = &nacl->node_auth;                \
 439                                                                         \
 440         if (!capable(CAP_SYS_ADMIN))                                    \
 441                 return -EPERM;                                          \
 442                                                                         \
 443         return snprintf(page, PAGE_SIZE, "%d\n", auth->name);           \
 444 }
 445
 446 #define DEF_NACL_AUTH_STR(name, flags)                                  \
 447         __DEF_NACL_AUTH_STR(nacl_auth, name, flags)                     \
 448 static ssize_t iscsi_nacl_auth_show_##name(                             \
 449         struct se_node_acl *nacl,                                       \
 450         char *page)                                                     \
 451 {                                                                       \
 452         return __iscsi_nacl_auth_show_##name(container_of(nacl,         \
 453                         struct iscsi_node_acl, se_node_acl), page);             \
 454 }                                                                       \
 455 static ssize_t iscsi_nacl_auth_store_##name(                            \
 456         struct se_node_acl *nacl,                                       \
 457         const char *page,                                               \
 458         size_t count)                                                   \
 459 {                                                                       \
 460         return __iscsi_nacl_auth_store_##name(container_of(nacl,        \
 461                         struct iscsi_node_acl, se_node_acl), page, count);      \
 462 }
 463
 464 #define DEF_NACL_AUTH_INT(name)                                         \
 465         __DEF_NACL_AUTH_INT(nacl_auth, name)                            \
 466 static ssize_t iscsi_nacl_auth_show_##name(                             \
 467         struct se_node_acl *nacl,                                       \
 468         char *page)                                                     \
 469 {                                                                       \
 470         return __iscsi_nacl_auth_show_##name(container_of(nacl,         \
 471                         struct iscsi_node_acl, se_node_acl), page);             \
 472 }
 473
 474 #define AUTH_ATTR(_name, _mode) TF_NACL_AUTH_ATTR(iscsi, _name, _mode);
 475 #define AUTH_ATTR_RO(_name) TF_NACL_AUTH_ATTR_RO(iscsi, _name);
 476
 477 /*
 478  * One-way authentication userid
 479  */
 480 DEF_NACL_AUTH_STR(userid, NAF_USERID_SET);
 481 AUTH_ATTR(userid, S_IRUGO | S_IWUSR);
 482 /*
 483  * One-way authentication password
 484  */
 485 DEF_NACL_AUTH_STR(password, NAF_PASSWORD_SET);
 486 AUTH_ATTR(password, S_IRUGO | S_IWUSR);
 487 /*
 488  * Enforce mutual authentication
 489  */
 490 DEF_NACL_AUTH_INT(authenticate_target);
 491 AUTH_ATTR_RO(authenticate_target);
 492 /*
 493  * Mutual authentication userid
 494  */
 495 DEF_NACL_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
 496 AUTH_ATTR(userid_mutual, S_IRUGO | S_IWUSR);
 497 /*
 498  * Mutual authentication password
 499  */
 500 DEF_NACL_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
 501 AUTH_ATTR(password_mutual, S_IRUGO | S_IWUSR);
 502
 503 static struct configfs_attribute *lio_target_nacl_auth_attrs[] = {
 504         &iscsi_nacl_auth_userid.attr,
 505         &iscsi_nacl_auth_password.attr,
 506         &iscsi_nacl_auth_authenticate_target.attr,
 507         &iscsi_nacl_auth_userid_mutual.attr,
 508         &iscsi_nacl_auth_password_mutual.attr,
 509         NULL,
 510 };
 511
 512 /* End items for lio_target_nacl_auth_cit */
 513
 514 /* Start items for lio_target_nacl_param_cit */
 515
 516 #define DEF_NACL_PARAM(name)                                            \
 517 static ssize_t iscsi_nacl_param_show_##name(                            \
 518         struct se_node_acl *se_nacl,                                    \
 519         char *page)                                                     \
 520 {                                                                       \
 521         struct iscsi_session *sess;                                     \
 522         struct se_session *se_sess;                                     \
 523         ssize_t rb;                                                     \
 524                                                                         \
 525         spin_lock_bh(&se_nacl->nacl_sess_lock);                         \
 526         se_sess = se_nacl->nacl_sess;                                   \
 527         if (!se_sess) {                                                 \
 528                 rb = snprintf(page, PAGE_SIZE,                          \
 529                         "No Active iSCSI Session\n");                   \
 530         } else {                                                        \
 531                 sess = se_sess->fabric_sess_ptr;                        \
 532                 rb = snprintf(page, PAGE_SIZE, "%u\n",                  \
 533                         (u32)sess->sess_ops->name);                     \
 534         }                                                               \
 535         spin_unlock_bh(&se_nacl->nacl_sess_lock);                       \
 536                                                                         \
 537         return rb;                                                      \
 538 }
 539
 540 #define NACL_PARAM_ATTR(_name) TF_NACL_PARAM_ATTR_RO(iscsi, _name);
 541
 542 DEF_NACL_PARAM(MaxConnections);
 543 NACL_PARAM_ATTR(MaxConnections);
 544
 545 DEF_NACL_PARAM(InitialR2T);
 546 NACL_PARAM_ATTR(InitialR2T);
 547
 548 DEF_NACL_PARAM(ImmediateData);
 549 NACL_PARAM_ATTR(ImmediateData);
 550
 551 DEF_NACL_PARAM(MaxBurstLength);
 552 NACL_PARAM_ATTR(MaxBurstLength);
 553
 554 DEF_NACL_PARAM(FirstBurstLength);
 555 NACL_PARAM_ATTR(FirstBurstLength);
 556
 557 DEF_NACL_PARAM(DefaultTime2Wait);
 558 NACL_PARAM_ATTR(DefaultTime2Wait);
 559
 560 DEF_NACL_PARAM(DefaultTime2Retain);
 561 NACL_PARAM_ATTR(DefaultTime2Retain);
 562
 563 DEF_NACL_PARAM(MaxOutstandingR2T);
 564 NACL_PARAM_ATTR(MaxOutstandingR2T);
 565
 566 DEF_NACL_PARAM(DataPDUInOrder);
 567 NACL_PARAM_ATTR(DataPDUInOrder);
 568
 569 DEF_NACL_PARAM(DataSequenceInOrder);
 570 NACL_PARAM_ATTR(DataSequenceInOrder);
 571
 572 DEF_NACL_PARAM(ErrorRecoveryLevel);
 573 NACL_PARAM_ATTR(ErrorRecoveryLevel);
 574
 575 static struct configfs_attribute *lio_target_nacl_param_attrs[] = {
 576         &iscsi_nacl_param_MaxConnections.attr,
 577         &iscsi_nacl_param_InitialR2T.attr,
 578         &iscsi_nacl_param_ImmediateData.attr,
 579         &iscsi_nacl_param_MaxBurstLength.attr,
 580         &iscsi_nacl_param_FirstBurstLength.attr,
 581         &iscsi_nacl_param_DefaultTime2Wait.attr,
 582         &iscsi_nacl_param_DefaultTime2Retain.attr,
 583         &iscsi_nacl_param_MaxOutstandingR2T.attr,
 584         &iscsi_nacl_param_DataPDUInOrder.attr,
 585         &iscsi_nacl_param_DataSequenceInOrder.attr,
 586         &iscsi_nacl_param_ErrorRecoveryLevel.attr,
 587         NULL,
 588 };
 589
 590 /* End items for lio_target_nacl_param_cit */
 591
 592 /* Start items for lio_target_acl_cit */
 593
 594 static ssize_t lio_target_nacl_show_info(
 595         struct se_node_acl *se_nacl,
 596         char *page)
 597 {
 598         struct iscsi_session *sess;
 599         struct iscsi_conn *conn;
 600         struct se_session *se_sess;
 601         ssize_t rb = 0;
 602
 603         spin_lock_bh(&se_nacl->nacl_sess_lock);
 604         se_sess = se_nacl->nacl_sess;
 605         if (!se_sess) {
 606                 rb += sprintf(page+rb, "No active iSCSI Session for Initiator"
 607                         " Endpoint: %s\n", se_nacl->initiatorname);
 608         } else {
 609                 sess = se_sess->fabric_sess_ptr;
 610
 611                 if (sess->sess_ops->InitiatorName)
 612                         rb += sprintf(page+rb, "InitiatorName: %s\n",
 613                                 sess->sess_ops->InitiatorName);
 614                 if (sess->sess_ops->InitiatorAlias)
 615                         rb += sprintf(page+rb, "InitiatorAlias: %s\n",
 616                                 sess->sess_ops->InitiatorAlias);
 617
 618                 rb += sprintf(page+rb, "LIO Session ID: %u   "
 619                         "ISID: 0x%02x %02x %02x %02x %02x %02x  "
 620                         "TSIH: %hu  ", sess->sid,
 621                         sess->isid[0], sess->isid[1], sess->isid[2],
 622                         sess->isid[3], sess->isid[4], sess->isid[5],
 623                         sess->tsih);
 624                 rb += sprintf(page+rb, "SessionType: %s\n",
 625                                 (sess->sess_ops->SessionType) ?
 626                                 "Discovery" : "Normal");
 627                 rb += sprintf(page+rb, "Session State: ");
 628                 switch (sess->session_state) {
 629                 case TARG_SESS_STATE_FREE:
 630                         rb += sprintf(page+rb, "TARG_SESS_FREE\n");
 631                         break;
 632                 case TARG_SESS_STATE_ACTIVE:
 633                         rb += sprintf(page+rb, "TARG_SESS_STATE_ACTIVE\n");
 634                         break;
 635                 case TARG_SESS_STATE_LOGGED_IN:
 636                         rb += sprintf(page+rb, "TARG_SESS_STATE_LOGGED_IN\n");
 637                         break;
 638                 case TARG_SESS_STATE_FAILED:
 639                         rb += sprintf(page+rb, "TARG_SESS_STATE_FAILED\n");
 640                         break;
 641                 case TARG_SESS_STATE_IN_CONTINUE:
 642                         rb += sprintf(page+rb, "TARG_SESS_STATE_IN_CONTINUE\n");
 643                         break;
 644                 default:
 645                         rb += sprintf(page+rb, "ERROR: Unknown Session"
 646                                         " State!\n");
 647                         break;
 648                 }
 649
 650                 rb += sprintf(page+rb, "---------------------[iSCSI Session"
 651                                 " Values]-----------------------\n");
 652                 rb += sprintf(page+rb, "  CmdSN/WR  :  CmdSN/WC  :  ExpCmdSN"
 653                                 "  :  MaxCmdSN  :     ITT    :     TTT\n");
 654                 rb += sprintf(page+rb, " 0x%08x   0x%08x   0x%08x   0x%08x"
 655                                 "   0x%08x   0x%08x\n",
 656                         sess->cmdsn_window,
 657                         (sess->max_cmd_sn - sess->exp_cmd_sn) + 1,
 658                         sess->exp_cmd_sn, sess->max_cmd_sn,
 659                         sess->init_task_tag, sess->targ_xfer_tag);
 660                 rb += sprintf(page+rb, "----------------------[iSCSI"
 661                                 " Connections]-------------------------\n");
 662
 663                 spin_lock(&sess->conn_lock);
 664                 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
 665                         rb += sprintf(page+rb, "CID: %hu  Connection"
 666                                         " State: ", conn->cid);
 667                         switch (conn->conn_state) {
 668                         case TARG_CONN_STATE_FREE:
 669                                 rb += sprintf(page+rb,
 670                                         "TARG_CONN_STATE_FREE\n");
 671                                 break;
 672                         case TARG_CONN_STATE_XPT_UP:
 673                                 rb += sprintf(page+rb,
 674                                         "TARG_CONN_STATE_XPT_UP\n");
 675                                 break;
 676                         case TARG_CONN_STATE_IN_LOGIN:
 677                                 rb += sprintf(page+rb,
 678                                         "TARG_CONN_STATE_IN_LOGIN\n");
 679                                 break;
 680                         case TARG_CONN_STATE_LOGGED_IN:
 681                                 rb += sprintf(page+rb,
 682                                         "TARG_CONN_STATE_LOGGED_IN\n");
 683                                 break;
 684                         case TARG_CONN_STATE_IN_LOGOUT:
 685                                 rb += sprintf(page+rb,
 686                                         "TARG_CONN_STATE_IN_LOGOUT\n");
 687                                 break;
 688                         case TARG_CONN_STATE_LOGOUT_REQUESTED:
 689                                 rb += sprintf(page+rb,
 690                                         "TARG_CONN_STATE_LOGOUT_REQUESTED\n");
 691                                 break;
 692                         case TARG_CONN_STATE_CLEANUP_WAIT:
 693                                 rb += sprintf(page+rb,
 694                                         "TARG_CONN_STATE_CLEANUP_WAIT\n");
 695                                 break;
 696                         default:
 697                                 rb += sprintf(page+rb,
 698                                         "ERROR: Unknown Connection State!\n");
 699                                 break;
 700                         }
 701
 702                         rb += sprintf(page+rb, "   Address %s %s", conn->login_ip,
 703                                 (conn->network_transport == ISCSI_TCP) ?
 704                                 "TCP" : "SCTP");
 705                         rb += sprintf(page+rb, "  StatSN: 0x%08x\n",
 706                                 conn->stat_sn);
 707                 }
 708                 spin_unlock(&sess->conn_lock);
 709         }
 710         spin_unlock_bh(&se_nacl->nacl_sess_lock);
 711
 712         return rb;
 713 }
 714
 715 TF_NACL_BASE_ATTR_RO(lio_target, info);
 716
 717 static ssize_t lio_target_nacl_show_cmdsn_depth(
 718         struct se_node_acl *se_nacl,
 719         char *page)
 720 {
 721         return sprintf(page, "%u\n", se_nacl->queue_depth);
 722 }
 723
 724 static ssize_t lio_target_nacl_store_cmdsn_depth(
 725         struct se_node_acl *se_nacl,
 726         const char *page,
 727         size_t count)
 728 {
 729         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 730         struct iscsi_portal_group *tpg = container_of(se_tpg,
 731                         struct iscsi_portal_group, tpg_se_tpg);
 732         struct config_item *acl_ci, *tpg_ci, *wwn_ci;
 733         char *endptr;
 734         u32 cmdsn_depth = 0;
 735         int ret;
 736
 737         cmdsn_depth = simple_strtoul(page, &endptr, 0);
 738         if (cmdsn_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 739                 pr_err("Passed cmdsn_depth: %u exceeds"
 740                         " TA_DEFAULT_CMDSN_DEPTH_MAX: %u\n", cmdsn_depth,
 741                         TA_DEFAULT_CMDSN_DEPTH_MAX);
 742                 return -EINVAL;
 743         }
 744         acl_ci = &se_nacl->acl_group.cg_item;
 745         if (!acl_ci) {
 746                 pr_err("Unable to locatel acl_ci\n");
 747                 return -EINVAL;
 748         }
 749         tpg_ci = &acl_ci->ci_parent->ci_group->cg_item;
 750         if (!tpg_ci) {
 751                 pr_err("Unable to locate tpg_ci\n");
 752                 return -EINVAL;
 753         }
 754         wwn_ci = &tpg_ci->ci_group->cg_item;
 755         if (!wwn_ci) {
 756                 pr_err("Unable to locate config_item wwn_ci\n");
 757                 return -EINVAL;
 758         }
 759
 760         if (iscsit_get_tpg(tpg) < 0)
 761                 return -EINVAL;
 762         /*
 763          * iscsit_tpg_set_initiator_node_queue_depth() assumes force=1
 764          */
 765         ret = iscsit_tpg_set_initiator_node_queue_depth(tpg,
 766                                 config_item_name(acl_ci), cmdsn_depth, 1);
 767
 768         pr_debug("LIO_Target_ConfigFS: %s/%s Set CmdSN Window: %u for"
 769                 "InitiatorName: %s\n", config_item_name(wwn_ci),
 770                 config_item_name(tpg_ci), cmdsn_depth,
 771                 config_item_name(acl_ci));
 772
 773         iscsit_put_tpg(tpg);
 774         return (!ret) ? count : (ssize_t)ret;
 775 }
 776
 777 TF_NACL_BASE_ATTR(lio_target, cmdsn_depth, S_IRUGO | S_IWUSR);
 778
 779 static struct configfs_attribute *lio_target_initiator_attrs[] = {
 780         &lio_target_nacl_info.attr,
 781         &lio_target_nacl_cmdsn_depth.attr,
 782         NULL,
 783 };
 784
 785 static struct se_node_acl *lio_tpg_alloc_fabric_acl(
 786         struct se_portal_group *se_tpg)
 787 {
 788         struct iscsi_node_acl *acl;
 789
 790         acl = kzalloc(sizeof(struct iscsi_node_acl), GFP_KERNEL);
 791         if (!acl) {
 792                 pr_err("Unable to allocate memory for struct iscsi_node_acl\n");
 793                 return NULL;
 794         }
 795
 796         return &acl->se_node_acl;
 797 }
 798
 799 static struct se_node_acl *lio_target_make_nodeacl(
 800         struct se_portal_group *se_tpg,
 801         struct config_group *group,
 802         const char *name)
 803 {
 804         struct config_group *stats_cg;
 805         struct iscsi_node_acl *acl;
 806         struct se_node_acl *se_nacl_new, *se_nacl;
 807         struct iscsi_portal_group *tpg = container_of(se_tpg,
 808                         struct iscsi_portal_group, tpg_se_tpg);
 809         u32 cmdsn_depth;
 810
 811         se_nacl_new = lio_tpg_alloc_fabric_acl(se_tpg);
 812         if (!se_nacl_new)
 813                 return ERR_PTR(-ENOMEM);
 814
 815         acl = container_of(se_nacl_new, struct iscsi_node_acl,
 816                                 se_node_acl);
 817
 818         cmdsn_depth = ISCSI_TPG_ATTRIB(tpg)->default_cmdsn_depth;
 819         /*
 820          * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
 821          * when converting a NdoeACL from demo mode -> explict
 822          */
 823         se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
 824                                 name, cmdsn_depth);
 825         if (IS_ERR(se_nacl))
 826                 return se_nacl;
 827
 828         stats_cg = &acl->se_node_acl.acl_fabric_stat_group;
 829
 830         stats_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
 831                                 GFP_KERNEL);
 832         if (!stats_cg->default_groups) {
 833                 pr_err("Unable to allocate memory for"
 834                                 " stats_cg->default_groups\n");
 835                 core_tpg_del_initiator_node_acl(se_tpg, se_nacl, 1);
 836                 kfree(acl);
 837                 return ERR_PTR(-ENOMEM);
 838         }
 839
 840         stats_cg->default_groups[0] = &NODE_STAT_GRPS(acl)->iscsi_sess_stats_group;
 841         stats_cg->default_groups[1] = NULL;
 842         config_group_init_type_name(&NODE_STAT_GRPS(acl)->iscsi_sess_stats_group,
 843                         "iscsi_sess_stats", &iscsi_stat_sess_cit);
 844
 845         return se_nacl;
 846 }
 847
 848 static void lio_target_drop_nodeacl(
 849         struct se_node_acl *se_nacl)
 850 {
 851         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 852         struct iscsi_node_acl *acl = container_of(se_nacl,
 853                         struct iscsi_node_acl, se_node_acl);
 854         struct config_item *df_item;
 855         struct config_group *stats_cg;
 856         int i;
 857
 858         stats_cg = &acl->se_node_acl.acl_fabric_stat_group;
 859         for (i = 0; stats_cg->default_groups[i]; i++) {
 860                 df_item = &stats_cg->default_groups[i]->cg_item;
 861                 stats_cg->default_groups[i] = NULL;
 862                 config_item_put(df_item);
 863         }
 864         kfree(stats_cg->default_groups);
 865
 866         core_tpg_del_initiator_node_acl(se_tpg, se_nacl, 1);
 867         kfree(acl);
 868 }
 869
 870 /* End items for lio_target_acl_cit */
 871
 872 /* Start items for lio_target_tpg_attrib_cit */
 873
 874 #define DEF_TPG_ATTRIB(name)                                            \
 875                                                                         \
 876 static ssize_t iscsi_tpg_attrib_show_##name(                            \
 877         struct se_portal_group *se_tpg,                         \
 878         char *page)                                                     \
 879 {                                                                       \
 880         struct iscsi_portal_group *tpg = container_of(se_tpg,           \
 881                         struct iscsi_portal_group, tpg_se_tpg); \
 882         ssize_t rb;                                                     \
 883                                                                         \
 884         if (iscsit_get_tpg(tpg) < 0)                                    \
 885                 return -EINVAL;                                         \
 886                                                                         \
 887         rb = sprintf(page, "%u\n", ISCSI_TPG_ATTRIB(tpg)->name);        \
 888         iscsit_put_tpg(tpg);                                            \
 889         return rb;                                                      \
 890 }                                                                       \
 891                                                                         \
 892 static ssize_t iscsi_tpg_attrib_store_##name(                           \
 893         struct se_portal_group *se_tpg,                         \
 894         const char *page,                                               \
 895         size_t count)                                                   \
 896 {                                                                       \
 897         struct iscsi_portal_group *tpg = container_of(se_tpg,           \
 898                         struct iscsi_portal_group, tpg_se_tpg); \
 899         char *endptr;                                                   \
 900         u32 val;                                                        \
 901         int ret;                                                        \
 902                                                                         \
 903         if (iscsit_get_tpg(tpg) < 0)                                    \
 904                 return -EINVAL;                                         \
 905                                                                         \
 906         val = simple_strtoul(page, &endptr, 0);                         \
 907         ret = iscsit_ta_##name(tpg, val);                               \
 908         if (ret < 0)                                                    \
 909                 goto out;                                               \
 910                                                                         \
 911         iscsit_put_tpg(tpg);                                            \
 912         return count;                                                   \
 913 out:                                                                    \
 914         iscsit_put_tpg(tpg);                                            \
 915         return ret;                                                     \
 916 }
 917
 918 #define TPG_ATTR(_name, _mode) TF_TPG_ATTRIB_ATTR(iscsi, _name, _mode);
 919
 920 /*
 921  * Define iscsi_tpg_attrib_s_authentication
 922  */
 923 DEF_TPG_ATTRIB(authentication);
 924 TPG_ATTR(authentication, S_IRUGO | S_IWUSR);
 925 /*
 926  * Define iscsi_tpg_attrib_s_login_timeout
 927  */
 928 DEF_TPG_ATTRIB(login_timeout);
 929 TPG_ATTR(login_timeout, S_IRUGO | S_IWUSR);
 930 /*
 931  * Define iscsi_tpg_attrib_s_netif_timeout
 932  */
 933 DEF_TPG_ATTRIB(netif_timeout);
 934 TPG_ATTR(netif_timeout, S_IRUGO | S_IWUSR);
 935 /*
 936  * Define iscsi_tpg_attrib_s_generate_node_acls
 937  */
 938 DEF_TPG_ATTRIB(generate_node_acls);
 939 TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);
 940 /*
 941  * Define iscsi_tpg_attrib_s_default_cmdsn_depth
 942  */
 943 DEF_TPG_ATTRIB(default_cmdsn_depth);
 944 TPG_ATTR(default_cmdsn_depth, S_IRUGO | S_IWUSR);
 945 /*
 946  Define iscsi_tpg_attrib_s_cache_dynamic_acls
 947  */
 948 DEF_TPG_ATTRIB(cache_dynamic_acls);
 949 TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);
 950 /*
 951  * Define iscsi_tpg_attrib_s_demo_mode_write_protect
 952  */
 953 DEF_TPG_ATTRIB(demo_mode_write_protect);
 954 TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
 955 /*
 956  * Define iscsi_tpg_attrib_s_prod_mode_write_protect
 957  */
 958 DEF_TPG_ATTRIB(prod_mode_write_protect);
 959 TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
 960
 961 static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
 962         &iscsi_tpg_attrib_authentication.attr,
 963         &iscsi_tpg_attrib_login_timeout.attr,
 964         &iscsi_tpg_attrib_netif_timeout.attr,
 965         &iscsi_tpg_attrib_generate_node_acls.attr,
 966         &iscsi_tpg_attrib_default_cmdsn_depth.attr,
 967         &iscsi_tpg_attrib_cache_dynamic_acls.attr,
 968         &iscsi_tpg_attrib_demo_mode_write_protect.attr,
 969         &iscsi_tpg_attrib_prod_mode_write_protect.attr,
 970         NULL,
 971 };
 972
 973 /* End items for lio_target_tpg_attrib_cit */
 974
 975 /* Start items for lio_target_tpg_param_cit */
 976
 977 #define DEF_TPG_PARAM(name)                                             \
 978 static ssize_t iscsi_tpg_param_show_##name(                             \
 979         struct se_portal_group *se_tpg,                                 \
 980         char *page)                                                     \
 981 {                                                                       \
 982         struct iscsi_portal_group *tpg = container_of(se_tpg,           \
 983                         struct iscsi_portal_group, tpg_se_tpg);         \
 984         struct iscsi_param *param;                                      \
 985         ssize_t rb;                                                     \
 986                                                                         \
 987         if (iscsit_get_tpg(tpg) < 0)                                    \
 988                 return -EINVAL;                                         \
 989                                                                         \
 990         param = iscsi_find_param_from_key(__stringify(name),            \
 991                                 tpg->param_list);                       \
 992         if (!param) {                                                   \
 993                 iscsit_put_tpg(tpg);                                    \
 994                 return -EINVAL;                                         \
 995         }                                                               \
 996         rb = snprintf(page, PAGE_SIZE, "%s\n", param->value);           \
 997                                                                         \
 998         iscsit_put_tpg(tpg);                                            \
 999         return rb;                                                      \
1000 }                                                                       \
1001 static ssize_t iscsi_tpg_param_store_##name(                            \
1002         struct se_portal_group *se_tpg,                         \
1003         const char *page,                                               \
1004         size_t count)                                                   \
1005 {                                                                       \
1006         struct iscsi_portal_group *tpg = container_of(se_tpg,           \
1007                         struct iscsi_portal_group, tpg_se_tpg);         \
1008         char *buf;                                                      \
1009         int ret;                                                        \
1010                                                                         \
1011         buf = kzalloc(PAGE_SIZE, GFP_KERNEL);                           \
1012         if (!buf)                                                       \
1013                 return -ENOMEM;                                         \
1014         snprintf(buf, PAGE_SIZE, "%s=%s", __stringify(name), page);     \
1015         buf[strlen(buf)-1] = '\0'; /* Kill newline */                   \
1016                                                                         \
1017         if (iscsit_get_tpg(tpg) < 0) {                                  \
1018                 kfree(buf);                                             \
1019                 return -EINVAL;                                         \
1020         }                                                               \
1021                                                                         \
1022         ret = iscsi_change_param_value(buf, tpg->param_list, 1);        \
1023         if (ret < 0)                                                    \
1024                 goto out;                                               \
1025                                                                         \
1026         kfree(buf);                                                     \
1027         iscsit_put_tpg(tpg);                                            \
1028         return count;                                                   \
1029 out:                                                                    \
1030         kfree(buf);                                                     \
1031         iscsit_put_tpg(tpg);                                            \
1032         return -EINVAL;                                         \
1033 }
1034
1035 #define TPG_PARAM_ATTR(_name, _mode) TF_TPG_PARAM_ATTR(iscsi, _name, _mode);
1036
1037 DEF_TPG_PARAM(AuthMethod);
1038 TPG_PARAM_ATTR(AuthMethod, S_IRUGO | S_IWUSR);
1039
1040 DEF_TPG_PARAM(HeaderDigest);
1041 TPG_PARAM_ATTR(HeaderDigest, S_IRUGO | S_IWUSR);
1042
1043 DEF_TPG_PARAM(DataDigest);
1044 TPG_PARAM_ATTR(DataDigest, S_IRUGO | S_IWUSR);
1045
1046 DEF_TPG_PARAM(MaxConnections);
1047 TPG_PARAM_ATTR(MaxConnections, S_IRUGO | S_IWUSR);
1048
1049 DEF_TPG_PARAM(TargetAlias);
1050 TPG_PARAM_ATTR(TargetAlias, S_IRUGO | S_IWUSR);
1051
1052 DEF_TPG_PARAM(InitialR2T);
1053 TPG_PARAM_ATTR(InitialR2T, S_IRUGO | S_IWUSR);
1054
1055 DEF_TPG_PARAM(ImmediateData);
1056 TPG_PARAM_ATTR(ImmediateData, S_IRUGO | S_IWUSR);
1057
1058 DEF_TPG_PARAM(MaxRecvDataSegmentLength);
1059 TPG_PARAM_ATTR(MaxRecvDataSegmentLength, S_IRUGO | S_IWUSR);
1060
1061 DEF_TPG_PARAM(MaxBurstLength);
1062 TPG_PARAM_ATTR(MaxBurstLength, S_IRUGO | S_IWUSR);
1063
1064 DEF_TPG_PARAM(FirstBurstLength);
1065 TPG_PARAM_ATTR(FirstBurstLength, S_IRUGO | S_IWUSR);
1066
1067 DEF_TPG_PARAM(DefaultTime2Wait);
1068 TPG_PARAM_ATTR(DefaultTime2Wait, S_IRUGO | S_IWUSR);
1069
1070 DEF_TPG_PARAM(DefaultTime2Retain);
1071 TPG_PARAM_ATTR(DefaultTime2Retain, S_IRUGO | S_IWUSR);
1072
1073 DEF_TPG_PARAM(MaxOutstandingR2T);
1074 TPG_PARAM_ATTR(MaxOutstandingR2T, S_IRUGO | S_IWUSR);
1075
1076 DEF_TPG_PARAM(DataPDUInOrder);
1077 TPG_PARAM_ATTR(DataPDUInOrder, S_IRUGO | S_IWUSR);
1078
1079 DEF_TPG_PARAM(DataSequenceInOrder);
1080 TPG_PARAM_ATTR(DataSequenceInOrder, S_IRUGO | S_IWUSR);
1081
1082 DEF_TPG_PARAM(ErrorRecoveryLevel);
1083 TPG_PARAM_ATTR(ErrorRecoveryLevel, S_IRUGO | S_IWUSR);
1084
1085 DEF_TPG_PARAM(IFMarker);
1086 TPG_PARAM_ATTR(IFMarker, S_IRUGO | S_IWUSR);
1087
1088 DEF_TPG_PARAM(OFMarker);
1089 TPG_PARAM_ATTR(OFMarker, S_IRUGO | S_IWUSR);
1090
1091 DEF_TPG_PARAM(IFMarkInt);
1092 TPG_PARAM_ATTR(IFMarkInt, S_IRUGO | S_IWUSR);
1093
1094 DEF_TPG_PARAM(OFMarkInt);
1095 TPG_PARAM_ATTR(OFMarkInt, S_IRUGO | S_IWUSR);
1096
1097 static struct configfs_attribute *lio_target_tpg_param_attrs[] = {
1098         &iscsi_tpg_param_AuthMethod.attr,
1099         &iscsi_tpg_param_HeaderDigest.attr,
1100         &iscsi_tpg_param_DataDigest.attr,
1101         &iscsi_tpg_param_MaxConnections.attr,
1102         &iscsi_tpg_param_TargetAlias.attr,
1103         &iscsi_tpg_param_InitialR2T.attr,
1104         &iscsi_tpg_param_ImmediateData.attr,
1105         &iscsi_tpg_param_MaxRecvDataSegmentLength.attr,
1106         &iscsi_tpg_param_MaxBurstLength.attr,
1107         &iscsi_tpg_param_FirstBurstLength.attr,
1108         &iscsi_tpg_param_DefaultTime2Wait.attr,
1109         &iscsi_tpg_param_DefaultTime2Retain.attr,
1110         &iscsi_tpg_param_MaxOutstandingR2T.attr,
1111         &iscsi_tpg_param_DataPDUInOrder.attr,
1112         &iscsi_tpg_param_DataSequenceInOrder.attr,
1113         &iscsi_tpg_param_ErrorRecoveryLevel.attr,
1114         &iscsi_tpg_param_IFMarker.attr,
1115         &iscsi_tpg_param_OFMarker.attr,
1116         &iscsi_tpg_param_IFMarkInt.attr,
1117         &iscsi_tpg_param_OFMarkInt.attr,
1118         NULL,
1119 };
1120
1121 /* End items for lio_target_tpg_param_cit */
1122
1123 /* Start items for lio_target_tpg_cit */
1124
1125 static ssize_t lio_target_tpg_show_enable(
1126         struct se_portal_group *se_tpg,
1127         char *page)
1128 {
1129         struct iscsi_portal_group *tpg = container_of(se_tpg,
1130                         struct iscsi_portal_group, tpg_se_tpg);
1131         ssize_t len;
1132
1133         spin_lock(&tpg->tpg_state_lock);
1134         len = sprintf(page, "%d\n",
1135                         (tpg->tpg_state == TPG_STATE_ACTIVE) ? 1 : 0);
1136         spin_unlock(&tpg->tpg_state_lock);
1137
1138         return len;
1139 }
1140
1141 static ssize_t lio_target_tpg_store_enable(
1142         struct se_portal_group *se_tpg,
1143         const char *page,
1144         size_t count)
1145 {
1146         struct iscsi_portal_group *tpg = container_of(se_tpg,
1147                         struct iscsi_portal_group, tpg_se_tpg);
1148         char *endptr;
1149         u32 op;
1150         int ret = 0;
1151
1152         op = simple_strtoul(page, &endptr, 0);
1153         if ((op != 1) && (op != 0)) {
1154                 pr_err("Illegal value for tpg_enable: %u\n", op);
1155                 return -EINVAL;
1156         }
1157
1158         ret = iscsit_get_tpg(tpg);
1159         if (ret < 0)
1160                 return -EINVAL;
1161
1162         if (op) {
1163                 ret = iscsit_tpg_enable_portal_group(tpg);
1164                 if (ret < 0)
1165                         goto out;
1166         } else {
1167                 /*
1168                  * iscsit_tpg_disable_portal_group() assumes force=1
1169                  */
1170                 ret = iscsit_tpg_disable_portal_group(tpg, 1);
1171                 if (ret < 0)
1172                         goto out;
1173         }
1174
1175         iscsit_put_tpg(tpg);
1176         return count;
1177 out:
1178         iscsit_put_tpg(tpg);
1179         return -EINVAL;
1180 }
1181
1182 TF_TPG_BASE_ATTR(lio_target, enable, S_IRUGO | S_IWUSR);
1183
1184 static struct configfs_attribute *lio_target_tpg_attrs[] = {
1185         &lio_target_tpg_enable.attr,
1186         NULL,
1187 };
1188
1189 /* End items for lio_target_tpg_cit */
1190
1191 /* Start items for lio_target_tiqn_cit */
1192
1193 struct se_portal_group *lio_target_tiqn_addtpg(
1194         struct se_wwn *wwn,
1195         struct config_group *group,
1196         const char *name)
1197 {
1198         struct iscsi_portal_group *tpg;
1199         struct iscsi_tiqn *tiqn;
1200         char *tpgt_str, *end_ptr;
1201         int ret = 0;
1202         unsigned short int tpgt;
1203
1204         tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
1205         /*
1206          * Only tpgt_# directory groups can be created below
1207          * target/iscsi/iqn.superturodiskarry/
1208         */
1209         tpgt_str = strstr(name, "tpgt_");
1210         if (!tpgt_str) {
1211                 pr_err("Unable to locate \"tpgt_#\" directory"
1212                                 " group\n");
1213                 return NULL;
1214         }
1215         tpgt_str += 5; /* Skip ahead of "tpgt_" */
1216         tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0);
1217
1218         tpg = iscsit_alloc_portal_group(tiqn, tpgt);
1219         if (!tpg)
1220                 return NULL;
1221
1222         ret = core_tpg_register(
1223                         &lio_target_fabric_configfs->tf_ops,
1224                         wwn, &tpg->tpg_se_tpg, tpg,
1225                         TRANSPORT_TPG_TYPE_NORMAL);
1226         if (ret < 0)
1227                 return NULL;
1228
1229         ret = iscsit_tpg_add_portal_group(tiqn, tpg);
1230         if (ret != 0)
1231                 goto out;
1232
1233         pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
1234         pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated TPG: %s\n",
1235                         name);
1236         return &tpg->tpg_se_tpg;
1237 out:
1238         core_tpg_deregister(&tpg->tpg_se_tpg);
1239         kfree(tpg);
1240         return NULL;
1241 }
1242
1243 void lio_target_tiqn_deltpg(struct se_portal_group *se_tpg)
1244 {
1245         struct iscsi_portal_group *tpg;
1246         struct iscsi_tiqn *tiqn;
1247
1248         tpg = container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
1249         tiqn = tpg->tpg_tiqn;
1250         /*
1251          * iscsit_tpg_del_portal_group() assumes force=1
1252          */
1253         pr_debug("LIO_Target_ConfigFS: DEREGISTER -> Releasing TPG\n");
1254         iscsit_tpg_del_portal_group(tiqn, tpg, 1);
1255 }
1256
1257 /* End items for lio_target_tiqn_cit */
1258
1259 /* Start LIO-Target TIQN struct contig_item lio_target_cit */
1260
1261 static ssize_t lio_target_wwn_show_attr_lio_version(
1262         struct target_fabric_configfs *tf,
1263         char *page)
1264 {
1265         return sprintf(page, "RisingTide Systems Linux-iSCSI Target "ISCSIT_VERSION"\n");
1266 }
1267
1268 TF_WWN_ATTR_RO(lio_target, lio_version);
1269
1270 static struct configfs_attribute *lio_target_wwn_attrs[] = {
1271         &lio_target_wwn_lio_version.attr,
1272         NULL,
1273 };
1274
1275 struct se_wwn *lio_target_call_coreaddtiqn(
1276         struct target_fabric_configfs *tf,
1277         struct config_group *group,
1278         const char *name)
1279 {
1280         struct config_group *stats_cg;
1281         struct iscsi_tiqn *tiqn;
1282
1283         tiqn = iscsit_add_tiqn((unsigned char *)name);
1284         if (IS_ERR(tiqn))
1285                 return ERR_CAST(tiqn);
1286         /*
1287          * Setup struct iscsi_wwn_stat_grps for se_wwn->fabric_stat_group.
1288          */
1289         stats_cg = &tiqn->tiqn_wwn.fabric_stat_group;
1290
1291         stats_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
1292                                 GFP_KERNEL);
1293         if (!stats_cg->default_groups) {
1294                 pr_err("Unable to allocate memory for"
1295                                 " stats_cg->default_groups\n");
1296                 iscsit_del_tiqn(tiqn);
1297                 return ERR_PTR(-ENOMEM);
1298         }
1299
1300         stats_cg->default_groups[0] = &WWN_STAT_GRPS(tiqn)->iscsi_instance_group;
1301         stats_cg->default_groups[1] = &WWN_STAT_GRPS(tiqn)->iscsi_sess_err_group;
1302         stats_cg->default_groups[2] = &WWN_STAT_GRPS(tiqn)->iscsi_tgt_attr_group;
1303         stats_cg->default_groups[3] = &WWN_STAT_GRPS(tiqn)->iscsi_login_stats_group;
1304         stats_cg->default_groups[4] = &WWN_STAT_GRPS(tiqn)->iscsi_logout_stats_group;
1305         stats_cg->default_groups[5] = NULL;
1306         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_instance_group,
1307                         "iscsi_instance", &iscsi_stat_instance_cit);
1308         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_sess_err_group,
1309                         "iscsi_sess_err", &iscsi_stat_sess_err_cit);
1310         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_tgt_attr_group,
1311                         "iscsi_tgt_attr", &iscsi_stat_tgt_attr_cit);
1312         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_login_stats_group,
1313                         "iscsi_login_stats", &iscsi_stat_login_cit);
1314         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_logout_stats_group,
1315                         "iscsi_logout_stats", &iscsi_stat_logout_cit);
1316
1317         pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
1318         pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated Node:"
1319                         " %s\n", name);
1320         return &tiqn->tiqn_wwn;
1321 }
1322
1323 void lio_target_call_coredeltiqn(
1324         struct se_wwn *wwn)
1325 {
1326         struct iscsi_tiqn *tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
1327         struct config_item *df_item;
1328         struct config_group *stats_cg;
1329         int i;
1330
1331         stats_cg = &tiqn->tiqn_wwn.fabric_stat_group;
1332         for (i = 0; stats_cg->default_groups[i]; i++) {
1333                 df_item = &stats_cg->default_groups[i]->cg_item;
1334                 stats_cg->default_groups[i] = NULL;
1335                 config_item_put(df_item);
1336         }
1337         kfree(stats_cg->default_groups);
1338
1339         pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s\n",
1340                         tiqn->tiqn);
1341         iscsit_del_tiqn(tiqn);
1342 }
1343
1344 /* End LIO-Target TIQN struct contig_lio_target_cit */
1345
1346 /* Start lio_target_discovery_auth_cit */
1347
1348 #define DEF_DISC_AUTH_STR(name, flags)                                  \
1349         __DEF_NACL_AUTH_STR(disc, name, flags)                          \
1350 static ssize_t iscsi_disc_show_##name(                                  \
1351         struct target_fabric_configfs *tf,                              \
1352         char *page)                                                     \
1353 {                                                                       \
1354         return __iscsi_disc_show_##name(&iscsit_global->discovery_acl,  \
1355                 page);                                                  \
1356 }                                                                       \
1357 static ssize_t iscsi_disc_store_##name(                                 \
1358         struct target_fabric_configfs *tf,                              \
1359         const char *page,                                               \
1360         size_t count)                                                   \
1361 {                                                                       \
1362         return __iscsi_disc_store_##name(&iscsit_global->discovery_acl, \
1363                 page, count);                                           \
1364 }
1365
1366 #define DEF_DISC_AUTH_INT(name)                                         \
1367         __DEF_NACL_AUTH_INT(disc, name)                                 \
1368 static ssize_t iscsi_disc_show_##name(                                  \
1369         struct target_fabric_configfs *tf,                              \
1370         char *page)                                                     \
1371 {                                                                       \
1372         return __iscsi_disc_show_##name(&iscsit_global->discovery_acl,  \
1373                         page);                                          \
1374 }
1375
1376 #define DISC_AUTH_ATTR(_name, _mode) TF_DISC_ATTR(iscsi, _name, _mode)
1377 #define DISC_AUTH_ATTR_RO(_name) TF_DISC_ATTR_RO(iscsi, _name)
1378
1379 /*
1380  * One-way authentication userid
1381  */
1382 DEF_DISC_AUTH_STR(userid, NAF_USERID_SET);
1383 DISC_AUTH_ATTR(userid, S_IRUGO | S_IWUSR);
1384 /*
1385  * One-way authentication password
1386  */
1387 DEF_DISC_AUTH_STR(password, NAF_PASSWORD_SET);
1388 DISC_AUTH_ATTR(password, S_IRUGO | S_IWUSR);
1389 /*
1390  * Enforce mutual authentication
1391  */
1392 DEF_DISC_AUTH_INT(authenticate_target);
1393 DISC_AUTH_ATTR_RO(authenticate_target);
1394 /*
1395  * Mutual authentication userid
1396  */
1397 DEF_DISC_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
1398 DISC_AUTH_ATTR(userid_mutual, S_IRUGO | S_IWUSR);
1399 /*
1400  * Mutual authentication password
1401  */
1402 DEF_DISC_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
1403 DISC_AUTH_ATTR(password_mutual, S_IRUGO | S_IWUSR);
1404
1405 /*
1406  * enforce_discovery_auth
1407  */
1408 static ssize_t iscsi_disc_show_enforce_discovery_auth(
1409         struct target_fabric_configfs *tf,
1410         char *page)
1411 {
1412         struct iscsi_node_auth *discovery_auth = &iscsit_global->discovery_acl.node_auth;
1413
1414         return sprintf(page, "%d\n", discovery_auth->enforce_discovery_auth);
1415 }
1416
1417 static ssize_t iscsi_disc_store_enforce_discovery_auth(
1418         struct target_fabric_configfs *tf,
1419         const char *page,
1420         size_t count)
1421 {
1422         struct iscsi_param *param;
1423         struct iscsi_portal_group *discovery_tpg = iscsit_global->discovery_tpg;
1424         char *endptr;
1425         u32 op;
1426
1427         op = simple_strtoul(page, &endptr, 0);
1428         if ((op != 1) && (op != 0)) {
1429                 pr_err("Illegal value for enforce_discovery_auth:"
1430                                 " %u\n", op);
1431                 return -EINVAL;
1432         }
1433
1434         if (!discovery_tpg) {
1435                 pr_err("iscsit_global->discovery_tpg is NULL\n");
1436                 return -EINVAL;
1437         }
1438
1439         param = iscsi_find_param_from_key(AUTHMETHOD,
1440                                 discovery_tpg->param_list);
1441         if (!param)
1442                 return -EINVAL;
1443
1444         if (op) {
1445                 /*
1446                  * Reset the AuthMethod key to CHAP.
1447                  */
1448                 if (iscsi_update_param_value(param, CHAP) < 0)
1449                         return -EINVAL;
1450
1451                 discovery_tpg->tpg_attrib.authentication = 1;
1452                 iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 1;
1453                 pr_debug("LIO-CORE[0] Successfully enabled"
1454                         " authentication enforcement for iSCSI"
1455                         " Discovery TPG\n");
1456         } else {
1457                 /*
1458                  * Reset the AuthMethod key to CHAP,None
1459                  */
1460                 if (iscsi_update_param_value(param, "CHAP,None") < 0)
1461                         return -EINVAL;
1462
1463                 discovery_tpg->tpg_attrib.authentication = 0;
1464                 iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 0;
1465                 pr_debug("LIO-CORE[0] Successfully disabled"
1466                         " authentication enforcement for iSCSI"
1467                         " Discovery TPG\n");
1468         }
1469
1470         return count;
1471 }
1472
1473 DISC_AUTH_ATTR(enforce_discovery_auth, S_IRUGO | S_IWUSR);
1474
1475 static struct configfs_attribute *lio_target_discovery_auth_attrs[] = {
1476         &iscsi_disc_userid.attr,
1477         &iscsi_disc_password.attr,
1478         &iscsi_disc_authenticate_target.attr,
1479         &iscsi_disc_userid_mutual.attr,
1480         &iscsi_disc_password_mutual.attr,
1481         &iscsi_disc_enforce_discovery_auth.attr,
1482         NULL,
1483 };
1484
1485 /* End lio_target_discovery_auth_cit */
1486
1487 /* Start functions for target_core_fabric_ops */
1488
1489 static char *iscsi_get_fabric_name(void)
1490 {
1491         return "iSCSI";
1492 }
1493
1494 static u32 iscsi_get_task_tag(struct se_cmd *se_cmd)
1495 {
1496         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1497
1498         return cmd->init_task_tag;
1499 }
1500
1501 static int iscsi_get_cmd_state(struct se_cmd *se_cmd)
1502 {
1503         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1504
1505         return cmd->i_state;
1506 }
1507
1508 static int iscsi_is_state_remove(struct se_cmd *se_cmd)
1509 {
1510         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1511
1512         return (cmd->i_state == ISTATE_REMOVE);
1513 }
1514
1515 static int lio_sess_logged_in(struct se_session *se_sess)
1516 {
1517         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1518         int ret;
1519         /*
1520          * Called with spin_lock_bh(&tpg_lock); and
1521          * spin_lock(&se_tpg->session_lock); held.
1522          */
1523         spin_lock(&sess->conn_lock);
1524         ret = (sess->session_state != TARG_SESS_STATE_LOGGED_IN);
1525         spin_unlock(&sess->conn_lock);
1526
1527         return ret;
1528 }
1529
1530 static u32 lio_sess_get_index(struct se_session *se_sess)
1531 {
1532         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1533
1534         return sess->session_index;
1535 }
1536
1537 static u32 lio_sess_get_initiator_sid(
1538         struct se_session *se_sess,
1539         unsigned char *buf,
1540         u32 size)
1541 {
1542         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1543         /*
1544          * iSCSI Initiator Session Identifier from RFC-3720.
1545          */
1546         return snprintf(buf, size, "%02x%02x%02x%02x%02x%02x",
1547                 sess->isid[0], sess->isid[1], sess->isid[2],
1548                 sess->isid[3], sess->isid[4], sess->isid[5]);
1549 }
1550
1551 static int lio_queue_data_in(struct se_cmd *se_cmd)
1552 {
1553         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1554
1555         cmd->i_state = ISTATE_SEND_DATAIN;
1556         iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
1557         return 0;
1558 }
1559
1560 static int lio_write_pending(struct se_cmd *se_cmd)
1561 {
1562         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1563
1564         if (!cmd->immediate_data && !cmd->unsolicited_data)
1565                 return iscsit_build_r2ts_for_cmd(cmd, cmd->conn, 1);
1566
1567         return 0;
1568 }
1569
1570 static int lio_write_pending_status(struct se_cmd *se_cmd)
1571 {
1572         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1573         int ret;
1574
1575         spin_lock_bh(&cmd->istate_lock);
1576         ret = !(cmd->cmd_flags & ICF_GOT_LAST_DATAOUT);
1577         spin_unlock_bh(&cmd->istate_lock);
1578
1579         return ret;
1580 }
1581
1582 static int lio_queue_status(struct se_cmd *se_cmd)
1583 {
1584         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1585
1586         cmd->i_state = ISTATE_SEND_STATUS;
1587         iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
1588         return 0;
1589 }
1590
1591 static u16 lio_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length)
1592 {
1593         unsigned char *buffer = se_cmd->sense_buffer;
1594         /*
1595          * From RFC-3720 10.4.7.  Data Segment - Sense and Response Data Segment
1596          * 16-bit SenseLength.
1597          */
1598         buffer[0] = ((sense_length >> 8) & 0xff);
1599         buffer[1] = (sense_length & 0xff);
1600         /*
1601          * Return two byte offset into allocated sense_buffer.
1602          */
1603         return 2;
1604 }
1605
1606 static u16 lio_get_fabric_sense_len(void)
1607 {
1608         /*
1609          * Return two byte offset into allocated sense_buffer.
1610          */
1611         return 2;
1612 }
1613
1614 static int lio_queue_tm_rsp(struct se_cmd *se_cmd)
1615 {
1616         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1617
1618         cmd->i_state = ISTATE_SEND_TASKMGTRSP;
1619         iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
1620         return 0;
1621 }
1622
1623 static char *lio_tpg_get_endpoint_wwn(struct se_portal_group *se_tpg)
1624 {
1625         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1626
1627         return &tpg->tpg_tiqn->tiqn[0];
1628 }
1629
1630 static u16 lio_tpg_get_tag(struct se_portal_group *se_tpg)
1631 {
1632         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1633
1634         return tpg->tpgt;
1635 }
1636
1637 static u32 lio_tpg_get_default_depth(struct se_portal_group *se_tpg)
1638 {
1639         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1640
1641         return ISCSI_TPG_ATTRIB(tpg)->default_cmdsn_depth;
1642 }
1643
1644 static int lio_tpg_check_demo_mode(struct se_portal_group *se_tpg)
1645 {
1646         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1647
1648         return ISCSI_TPG_ATTRIB(tpg)->generate_node_acls;
1649 }
1650
1651 static int lio_tpg_check_demo_mode_cache(struct se_portal_group *se_tpg)
1652 {
1653         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1654
1655         return ISCSI_TPG_ATTRIB(tpg)->cache_dynamic_acls;
1656 }
1657
1658 static int lio_tpg_check_demo_mode_write_protect(
1659         struct se_portal_group *se_tpg)
1660 {
1661         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1662
1663         return ISCSI_TPG_ATTRIB(tpg)->demo_mode_write_protect;
1664 }
1665
1666 static int lio_tpg_check_prod_mode_write_protect(
1667         struct se_portal_group *se_tpg)
1668 {
1669         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1670
1671         return ISCSI_TPG_ATTRIB(tpg)->prod_mode_write_protect;
1672 }
1673
1674 static void lio_tpg_release_fabric_acl(
1675         struct se_portal_group *se_tpg,
1676         struct se_node_acl *se_acl)
1677 {
1678         struct iscsi_node_acl *acl = container_of(se_acl,
1679                                 struct iscsi_node_acl, se_node_acl);
1680         kfree(acl);
1681 }
1682
1683 /*
1684  * Called with spin_lock_bh(struct se_portal_group->session_lock) held..
1685  *
1686  * Also, this function calls iscsit_inc_session_usage_count() on the
1687  * struct iscsi_session in question.
1688  */
1689 static int lio_tpg_shutdown_session(struct se_session *se_sess)
1690 {
1691         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1692
1693         spin_lock(&sess->conn_lock);
1694         if (atomic_read(&sess->session_fall_back_to_erl0) ||
1695             atomic_read(&sess->session_logout) ||
1696             (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
1697                 spin_unlock(&sess->conn_lock);
1698                 return 0;
1699         }
1700         atomic_set(&sess->session_reinstatement, 1);
1701         spin_unlock(&sess->conn_lock);
1702
1703         iscsit_inc_session_usage_count(sess);
1704         iscsit_stop_time2retain_timer(sess);
1705
1706         return 1;
1707 }
1708
1709 /*
1710  * Calls iscsit_dec_session_usage_count() as inverse of
1711  * lio_tpg_shutdown_session()
1712  */
1713 static void lio_tpg_close_session(struct se_session *se_sess)
1714 {
1715         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1716         /*
1717          * If the iSCSI Session for the iSCSI Initiator Node exists,
1718          * forcefully shutdown the iSCSI NEXUS.
1719          */
1720         iscsit_stop_session(sess, 1, 1);
1721         iscsit_dec_session_usage_count(sess);
1722         iscsit_close_session(sess);
1723 }
1724
1725 static void lio_tpg_stop_session(
1726         struct se_session *se_sess,
1727         int sess_sleep,
1728         int conn_sleep)
1729 {
1730         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1731
1732         iscsit_stop_session(sess, sess_sleep, conn_sleep);
1733 }
1734
1735 static void lio_tpg_fall_back_to_erl0(struct se_session *se_sess)
1736 {
1737         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1738
1739         iscsit_fall_back_to_erl0(sess);
1740 }
1741
1742 static u32 lio_tpg_get_inst_index(struct se_portal_group *se_tpg)
1743 {
1744         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1745
1746         return tpg->tpg_tiqn->tiqn_index;
1747 }
1748
1749 static void lio_set_default_node_attributes(struct se_node_acl *se_acl)
1750 {
1751         struct iscsi_node_acl *acl = container_of(se_acl, struct iscsi_node_acl,
1752                                 se_node_acl);
1753
1754         ISCSI_NODE_ATTRIB(acl)->nacl = acl;
1755         iscsit_set_default_node_attribues(acl);
1756 }
1757
1758 static void lio_release_cmd(struct se_cmd *se_cmd)
1759 {
1760         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1761
1762         iscsit_release_cmd(cmd);
1763 }
1764
1765 /* End functions for target_core_fabric_ops */
1766
1767 int iscsi_target_register_configfs(void)
1768 {
1769         struct target_fabric_configfs *fabric;
1770         int ret;
1771
1772         lio_target_fabric_configfs = NULL;
1773         fabric = target_fabric_configfs_init(THIS_MODULE, "iscsi");
1774         if (IS_ERR(fabric)) {
1775                 pr_err("target_fabric_configfs_init() for"
1776                                 " LIO-Target failed!\n");
1777                 return PTR_ERR(fabric);
1778         }
1779         /*
1780          * Setup the fabric API of function pointers used by target_core_mod..
1781          */
1782         fabric->tf_ops.get_fabric_name = &iscsi_get_fabric_name;
1783         fabric->tf_ops.get_fabric_proto_ident = &iscsi_get_fabric_proto_ident;
1784         fabric->tf_ops.tpg_get_wwn = &lio_tpg_get_endpoint_wwn;
1785         fabric->tf_ops.tpg_get_tag = &lio_tpg_get_tag;
1786         fabric->tf_ops.tpg_get_default_depth = &lio_tpg_get_default_depth;
1787         fabric->tf_ops.tpg_get_pr_transport_id = &iscsi_get_pr_transport_id;
1788         fabric->tf_ops.tpg_get_pr_transport_id_len =
1789                                 &iscsi_get_pr_transport_id_len;
1790         fabric->tf_ops.tpg_parse_pr_out_transport_id =
1791                                 &iscsi_parse_pr_out_transport_id;
1792         fabric->tf_ops.tpg_check_demo_mode = &lio_tpg_check_demo_mode;
1793         fabric->tf_ops.tpg_check_demo_mode_cache =
1794                                 &lio_tpg_check_demo_mode_cache;
1795         fabric->tf_ops.tpg_check_demo_mode_write_protect =
1796                                 &lio_tpg_check_demo_mode_write_protect;
1797         fabric->tf_ops.tpg_check_prod_mode_write_protect =
1798                                 &lio_tpg_check_prod_mode_write_protect;
1799         fabric->tf_ops.tpg_alloc_fabric_acl = &lio_tpg_alloc_fabric_acl;
1800         fabric->tf_ops.tpg_release_fabric_acl = &lio_tpg_release_fabric_acl;
1801         fabric->tf_ops.tpg_get_inst_index = &lio_tpg_get_inst_index;
1802         fabric->tf_ops.release_cmd = &lio_release_cmd;
1803         fabric->tf_ops.shutdown_session = &lio_tpg_shutdown_session;
1804         fabric->tf_ops.close_session = &lio_tpg_close_session;
1805         fabric->tf_ops.stop_session = &lio_tpg_stop_session;
1806         fabric->tf_ops.fall_back_to_erl0 = &lio_tpg_fall_back_to_erl0;
1807         fabric->tf_ops.sess_logged_in = &lio_sess_logged_in;
1808         fabric->tf_ops.sess_get_index = &lio_sess_get_index;
1809         fabric->tf_ops.sess_get_initiator_sid = &lio_sess_get_initiator_sid;
1810         fabric->tf_ops.write_pending = &lio_write_pending;
1811         fabric->tf_ops.write_pending_status = &lio_write_pending_status;
1812         fabric->tf_ops.set_default_node_attributes =
1813                                 &lio_set_default_node_attributes;
1814         fabric->tf_ops.get_task_tag = &iscsi_get_task_tag;
1815         fabric->tf_ops.get_cmd_state = &iscsi_get_cmd_state;
1816         fabric->tf_ops.queue_data_in = &lio_queue_data_in;
1817         fabric->tf_ops.queue_status = &lio_queue_status;
1818         fabric->tf_ops.queue_tm_rsp = &lio_queue_tm_rsp;
1819         fabric->tf_ops.set_fabric_sense_len = &lio_set_fabric_sense_len;
1820         fabric->tf_ops.get_fabric_sense_len = &lio_get_fabric_sense_len;
1821         fabric->tf_ops.is_state_remove = &iscsi_is_state_remove;
1822         /*
1823          * Setup function pointers for generic logic in target_core_fabric_configfs.c
1824          */
1825         fabric->tf_ops.fabric_make_wwn = &lio_target_call_coreaddtiqn;
1826         fabric->tf_ops.fabric_drop_wwn = &lio_target_call_coredeltiqn;
1827         fabric->tf_ops.fabric_make_tpg = &lio_target_tiqn_addtpg;
1828         fabric->tf_ops.fabric_drop_tpg = &lio_target_tiqn_deltpg;
1829         fabric->tf_ops.fabric_post_link = NULL;
1830         fabric->tf_ops.fabric_pre_unlink = NULL;
1831         fabric->tf_ops.fabric_make_np = &lio_target_call_addnptotpg;
1832         fabric->tf_ops.fabric_drop_np = &lio_target_call_delnpfromtpg;
1833         fabric->tf_ops.fabric_make_nodeacl = &lio_target_make_nodeacl;
1834         fabric->tf_ops.fabric_drop_nodeacl = &lio_target_drop_nodeacl;
1835         /*
1836          * Setup default attribute lists for various fabric->tf_cit_tmpl
1837          * sturct config_item_type's
1838          */
1839         TF_CIT_TMPL(fabric)->tfc_discovery_cit.ct_attrs = lio_target_discovery_auth_attrs;
1840         TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = lio_target_wwn_attrs;
1841         TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = lio_target_tpg_attrs;
1842         TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = lio_target_tpg_attrib_attrs;
1843         TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = lio_target_tpg_param_attrs;
1844         TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = lio_target_portal_attrs;
1845         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = lio_target_initiator_attrs;
1846         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = lio_target_nacl_attrib_attrs;
1847         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = lio_target_nacl_auth_attrs;
1848         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = lio_target_nacl_param_attrs;
1849
1850         ret = target_fabric_configfs_register(fabric);
1851         if (ret < 0) {
1852                 pr_err("target_fabric_configfs_register() for"
1853                                 " LIO-Target failed!\n");
1854                 target_fabric_configfs_free(fabric);
1855                 return ret;
1856         }
1857
1858         lio_target_fabric_configfs = fabric;
1859         pr_debug("LIO_TARGET[0] - Set fabric ->"
1860                         " lio_target_fabric_configfs\n");
1861         return 0;
1862 }
1863
1864
1865 void iscsi_target_deregister_configfs(void)
1866 {
1867         if (!lio_target_fabric_configfs)
1868                 return;
1869         /*
1870          * Shutdown discovery sessions and disable discovery TPG
1871          */
1872         if (iscsit_global->discovery_tpg)
1873                 iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1);
1874
1875         target_fabric_configfs_deregister(lio_target_fabric_configfs);
1876         lio_target_fabric_configfs = NULL;
1877         pr_debug("LIO_TARGET[0] - Cleared"
1878                                 " lio_target_fabric_configfs\n");
1879 }