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         cmdsn_depth = ISCSI_TPG_ATTRIB(tpg)->default_cmdsn_depth;
 816         /*
 817          * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
 818          * when converting a NdoeACL from demo mode -> explict
 819          */
 820         se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
 821                                 name, cmdsn_depth);
 822         if (IS_ERR(se_nacl))
 823                 return se_nacl;
 824
 825         acl = container_of(se_nacl, struct iscsi_node_acl, se_node_acl);
 826         stats_cg = &se_nacl->acl_fabric_stat_group;
 827
 828         stats_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
 829                                 GFP_KERNEL);
 830         if (!stats_cg->default_groups) {
 831                 pr_err("Unable to allocate memory for"
 832                                 " stats_cg->default_groups\n");
 833                 core_tpg_del_initiator_node_acl(se_tpg, se_nacl, 1);
 834                 kfree(acl);
 835                 return ERR_PTR(-ENOMEM);
 836         }
 837
 838         stats_cg->default_groups[0] = &NODE_STAT_GRPS(acl)->iscsi_sess_stats_group;
 839         stats_cg->default_groups[1] = NULL;
 840         config_group_init_type_name(&NODE_STAT_GRPS(acl)->iscsi_sess_stats_group,
 841                         "iscsi_sess_stats", &iscsi_stat_sess_cit);
 842
 843         return se_nacl;
 844 }
 845
 846 static void lio_target_drop_nodeacl(
 847         struct se_node_acl *se_nacl)
 848 {
 849         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 850         struct iscsi_node_acl *acl = container_of(se_nacl,
 851                         struct iscsi_node_acl, se_node_acl);
 852         struct config_item *df_item;
 853         struct config_group *stats_cg;
 854         int i;
 855
 856         stats_cg = &acl->se_node_acl.acl_fabric_stat_group;
 857         for (i = 0; stats_cg->default_groups[i]; i++) {
 858                 df_item = &stats_cg->default_groups[i]->cg_item;
 859                 stats_cg->default_groups[i] = NULL;
 860                 config_item_put(df_item);
 861         }
 862         kfree(stats_cg->default_groups);
 863
 864         core_tpg_del_initiator_node_acl(se_tpg, se_nacl, 1);
 865         kfree(acl);
 866 }
 867
 868 /* End items for lio_target_acl_cit */
 869
 870 /* Start items for lio_target_tpg_attrib_cit */
 871
 872 #define DEF_TPG_ATTRIB(name)                                            \
 873                                                                         \
 874 static ssize_t iscsi_tpg_attrib_show_##name(                            \
 875         struct se_portal_group *se_tpg,                         \
 876         char *page)                                                     \
 877 {                                                                       \
 878         struct iscsi_portal_group *tpg = container_of(se_tpg,           \
 879                         struct iscsi_portal_group, tpg_se_tpg); \
 880         ssize_t rb;                                                     \
 881                                                                         \
 882         if (iscsit_get_tpg(tpg) < 0)                                    \
 883                 return -EINVAL;                                         \
 884                                                                         \
 885         rb = sprintf(page, "%u\n", ISCSI_TPG_ATTRIB(tpg)->name);        \
 886         iscsit_put_tpg(tpg);                                            \
 887         return rb;                                                      \
 888 }                                                                       \
 889                                                                         \
 890 static ssize_t iscsi_tpg_attrib_store_##name(                           \
 891         struct se_portal_group *se_tpg,                         \
 892         const char *page,                                               \
 893         size_t count)                                                   \
 894 {                                                                       \
 895         struct iscsi_portal_group *tpg = container_of(se_tpg,           \
 896                         struct iscsi_portal_group, tpg_se_tpg); \
 897         char *endptr;                                                   \
 898         u32 val;                                                        \
 899         int ret;                                                        \
 900                                                                         \
 901         if (iscsit_get_tpg(tpg) < 0)                                    \
 902                 return -EINVAL;                                         \
 903                                                                         \
 904         val = simple_strtoul(page, &endptr, 0);                         \
 905         ret = iscsit_ta_##name(tpg, val);                               \
 906         if (ret < 0)                                                    \
 907                 goto out;                                               \
 908                                                                         \
 909         iscsit_put_tpg(tpg);                                            \
 910         return count;                                                   \
 911 out:                                                                    \
 912         iscsit_put_tpg(tpg);                                            \
 913         return ret;                                                     \
 914 }
 915
 916 #define TPG_ATTR(_name, _mode) TF_TPG_ATTRIB_ATTR(iscsi, _name, _mode);
 917
 918 /*
 919  * Define iscsi_tpg_attrib_s_authentication
 920  */
 921 DEF_TPG_ATTRIB(authentication);
 922 TPG_ATTR(authentication, S_IRUGO | S_IWUSR);
 923 /*
 924  * Define iscsi_tpg_attrib_s_login_timeout
 925  */
 926 DEF_TPG_ATTRIB(login_timeout);
 927 TPG_ATTR(login_timeout, S_IRUGO | S_IWUSR);
 928 /*
 929  * Define iscsi_tpg_attrib_s_netif_timeout
 930  */
 931 DEF_TPG_ATTRIB(netif_timeout);
 932 TPG_ATTR(netif_timeout, S_IRUGO | S_IWUSR);
 933 /*
 934  * Define iscsi_tpg_attrib_s_generate_node_acls
 935  */
 936 DEF_TPG_ATTRIB(generate_node_acls);
 937 TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);
 938 /*
 939  * Define iscsi_tpg_attrib_s_default_cmdsn_depth
 940  */
 941 DEF_TPG_ATTRIB(default_cmdsn_depth);
 942 TPG_ATTR(default_cmdsn_depth, S_IRUGO | S_IWUSR);
 943 /*
 944  Define iscsi_tpg_attrib_s_cache_dynamic_acls
 945  */
 946 DEF_TPG_ATTRIB(cache_dynamic_acls);
 947 TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);
 948 /*
 949  * Define iscsi_tpg_attrib_s_demo_mode_write_protect
 950  */
 951 DEF_TPG_ATTRIB(demo_mode_write_protect);
 952 TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
 953 /*
 954  * Define iscsi_tpg_attrib_s_prod_mode_write_protect
 955  */
 956 DEF_TPG_ATTRIB(prod_mode_write_protect);
 957 TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
 958
 959 static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
 960         &iscsi_tpg_attrib_authentication.attr,
 961         &iscsi_tpg_attrib_login_timeout.attr,
 962         &iscsi_tpg_attrib_netif_timeout.attr,
 963         &iscsi_tpg_attrib_generate_node_acls.attr,
 964         &iscsi_tpg_attrib_default_cmdsn_depth.attr,
 965         &iscsi_tpg_attrib_cache_dynamic_acls.attr,
 966         &iscsi_tpg_attrib_demo_mode_write_protect.attr,
 967         &iscsi_tpg_attrib_prod_mode_write_protect.attr,
 968         NULL,
 969 };
 970
 971 /* End items for lio_target_tpg_attrib_cit */
 972
 973 /* Start items for lio_target_tpg_param_cit */
 974
 975 #define DEF_TPG_PARAM(name)                                             \
 976 static ssize_t iscsi_tpg_param_show_##name(                             \
 977         struct se_portal_group *se_tpg,                                 \
 978         char *page)                                                     \
 979 {                                                                       \
 980         struct iscsi_portal_group *tpg = container_of(se_tpg,           \
 981                         struct iscsi_portal_group, tpg_se_tpg);         \
 982         struct iscsi_param *param;                                      \
 983         ssize_t rb;                                                     \
 984                                                                         \
 985         if (iscsit_get_tpg(tpg) < 0)                                    \
 986                 return -EINVAL;                                         \
 987                                                                         \
 988         param = iscsi_find_param_from_key(__stringify(name),            \
 989                                 tpg->param_list);                       \
 990         if (!param) {                                                   \
 991                 iscsit_put_tpg(tpg);                                    \
 992                 return -EINVAL;                                         \
 993         }                                                               \
 994         rb = snprintf(page, PAGE_SIZE, "%s\n", param->value);           \
 995                                                                         \
 996         iscsit_put_tpg(tpg);                                            \
 997         return rb;                                                      \
 998 }                                                                       \
 999 static ssize_t iscsi_tpg_param_store_##name(                            \
1000         struct se_portal_group *se_tpg,                         \
1001         const char *page,                                               \
1002         size_t count)                                                   \
1003 {                                                                       \
1004         struct iscsi_portal_group *tpg = container_of(se_tpg,           \
1005                         struct iscsi_portal_group, tpg_se_tpg);         \
1006         char *buf;                                                      \
1007         int ret;                                                        \
1008                                                                         \
1009         buf = kzalloc(PAGE_SIZE, GFP_KERNEL);                           \
1010         if (!buf)                                                       \
1011                 return -ENOMEM;                                         \
1012         snprintf(buf, PAGE_SIZE, "%s=%s", __stringify(name), page);     \
1013         buf[strlen(buf)-1] = '\0'; /* Kill newline */                   \
1014                                                                         \
1015         if (iscsit_get_tpg(tpg) < 0) {                                  \
1016                 kfree(buf);                                             \
1017                 return -EINVAL;                                         \
1018         }                                                               \
1019                                                                         \
1020         ret = iscsi_change_param_value(buf, tpg->param_list, 1);        \
1021         if (ret < 0)                                                    \
1022                 goto out;                                               \
1023                                                                         \
1024         kfree(buf);                                                     \
1025         iscsit_put_tpg(tpg);                                            \
1026         return count;                                                   \
1027 out:                                                                    \
1028         kfree(buf);                                                     \
1029         iscsit_put_tpg(tpg);                                            \
1030         return -EINVAL;                                         \
1031 }
1032
1033 #define TPG_PARAM_ATTR(_name, _mode) TF_TPG_PARAM_ATTR(iscsi, _name, _mode);
1034
1035 DEF_TPG_PARAM(AuthMethod);
1036 TPG_PARAM_ATTR(AuthMethod, S_IRUGO | S_IWUSR);
1037
1038 DEF_TPG_PARAM(HeaderDigest);
1039 TPG_PARAM_ATTR(HeaderDigest, S_IRUGO | S_IWUSR);
1040
1041 DEF_TPG_PARAM(DataDigest);
1042 TPG_PARAM_ATTR(DataDigest, S_IRUGO | S_IWUSR);
1043
1044 DEF_TPG_PARAM(MaxConnections);
1045 TPG_PARAM_ATTR(MaxConnections, S_IRUGO | S_IWUSR);
1046
1047 DEF_TPG_PARAM(TargetAlias);
1048 TPG_PARAM_ATTR(TargetAlias, S_IRUGO | S_IWUSR);
1049
1050 DEF_TPG_PARAM(InitialR2T);
1051 TPG_PARAM_ATTR(InitialR2T, S_IRUGO | S_IWUSR);
1052
1053 DEF_TPG_PARAM(ImmediateData);
1054 TPG_PARAM_ATTR(ImmediateData, S_IRUGO | S_IWUSR);
1055
1056 DEF_TPG_PARAM(MaxRecvDataSegmentLength);
1057 TPG_PARAM_ATTR(MaxRecvDataSegmentLength, S_IRUGO | S_IWUSR);
1058
1059 DEF_TPG_PARAM(MaxBurstLength);
1060 TPG_PARAM_ATTR(MaxBurstLength, S_IRUGO | S_IWUSR);
1061
1062 DEF_TPG_PARAM(FirstBurstLength);
1063 TPG_PARAM_ATTR(FirstBurstLength, S_IRUGO | S_IWUSR);
1064
1065 DEF_TPG_PARAM(DefaultTime2Wait);
1066 TPG_PARAM_ATTR(DefaultTime2Wait, S_IRUGO | S_IWUSR);
1067
1068 DEF_TPG_PARAM(DefaultTime2Retain);
1069 TPG_PARAM_ATTR(DefaultTime2Retain, S_IRUGO | S_IWUSR);
1070
1071 DEF_TPG_PARAM(MaxOutstandingR2T);
1072 TPG_PARAM_ATTR(MaxOutstandingR2T, S_IRUGO | S_IWUSR);
1073
1074 DEF_TPG_PARAM(DataPDUInOrder);
1075 TPG_PARAM_ATTR(DataPDUInOrder, S_IRUGO | S_IWUSR);
1076
1077 DEF_TPG_PARAM(DataSequenceInOrder);
1078 TPG_PARAM_ATTR(DataSequenceInOrder, S_IRUGO | S_IWUSR);
1079
1080 DEF_TPG_PARAM(ErrorRecoveryLevel);
1081 TPG_PARAM_ATTR(ErrorRecoveryLevel, S_IRUGO | S_IWUSR);
1082
1083 DEF_TPG_PARAM(IFMarker);
1084 TPG_PARAM_ATTR(IFMarker, S_IRUGO | S_IWUSR);
1085
1086 DEF_TPG_PARAM(OFMarker);
1087 TPG_PARAM_ATTR(OFMarker, S_IRUGO | S_IWUSR);
1088
1089 DEF_TPG_PARAM(IFMarkInt);
1090 TPG_PARAM_ATTR(IFMarkInt, S_IRUGO | S_IWUSR);
1091
1092 DEF_TPG_PARAM(OFMarkInt);
1093 TPG_PARAM_ATTR(OFMarkInt, S_IRUGO | S_IWUSR);
1094
1095 static struct configfs_attribute *lio_target_tpg_param_attrs[] = {
1096         &iscsi_tpg_param_AuthMethod.attr,
1097         &iscsi_tpg_param_HeaderDigest.attr,
1098         &iscsi_tpg_param_DataDigest.attr,
1099         &iscsi_tpg_param_MaxConnections.attr,
1100         &iscsi_tpg_param_TargetAlias.attr,
1101         &iscsi_tpg_param_InitialR2T.attr,
1102         &iscsi_tpg_param_ImmediateData.attr,
1103         &iscsi_tpg_param_MaxRecvDataSegmentLength.attr,
1104         &iscsi_tpg_param_MaxBurstLength.attr,
1105         &iscsi_tpg_param_FirstBurstLength.attr,
1106         &iscsi_tpg_param_DefaultTime2Wait.attr,
1107         &iscsi_tpg_param_DefaultTime2Retain.attr,
1108         &iscsi_tpg_param_MaxOutstandingR2T.attr,
1109         &iscsi_tpg_param_DataPDUInOrder.attr,
1110         &iscsi_tpg_param_DataSequenceInOrder.attr,
1111         &iscsi_tpg_param_ErrorRecoveryLevel.attr,
1112         &iscsi_tpg_param_IFMarker.attr,
1113         &iscsi_tpg_param_OFMarker.attr,
1114         &iscsi_tpg_param_IFMarkInt.attr,
1115         &iscsi_tpg_param_OFMarkInt.attr,
1116         NULL,
1117 };
1118
1119 /* End items for lio_target_tpg_param_cit */
1120
1121 /* Start items for lio_target_tpg_cit */
1122
1123 static ssize_t lio_target_tpg_show_enable(
1124         struct se_portal_group *se_tpg,
1125         char *page)
1126 {
1127         struct iscsi_portal_group *tpg = container_of(se_tpg,
1128                         struct iscsi_portal_group, tpg_se_tpg);
1129         ssize_t len;
1130
1131         spin_lock(&tpg->tpg_state_lock);
1132         len = sprintf(page, "%d\n",
1133                         (tpg->tpg_state == TPG_STATE_ACTIVE) ? 1 : 0);
1134         spin_unlock(&tpg->tpg_state_lock);
1135
1136         return len;
1137 }
1138
1139 static ssize_t lio_target_tpg_store_enable(
1140         struct se_portal_group *se_tpg,
1141         const char *page,
1142         size_t count)
1143 {
1144         struct iscsi_portal_group *tpg = container_of(se_tpg,
1145                         struct iscsi_portal_group, tpg_se_tpg);
1146         char *endptr;
1147         u32 op;
1148         int ret = 0;
1149
1150         op = simple_strtoul(page, &endptr, 0);
1151         if ((op != 1) && (op != 0)) {
1152                 pr_err("Illegal value for tpg_enable: %u\n", op);
1153                 return -EINVAL;
1154         }
1155
1156         ret = iscsit_get_tpg(tpg);
1157         if (ret < 0)
1158                 return -EINVAL;
1159
1160         if (op) {
1161                 ret = iscsit_tpg_enable_portal_group(tpg);
1162                 if (ret < 0)
1163                         goto out;
1164         } else {
1165                 /*
1166                  * iscsit_tpg_disable_portal_group() assumes force=1
1167                  */
1168                 ret = iscsit_tpg_disable_portal_group(tpg, 1);
1169                 if (ret < 0)
1170                         goto out;
1171         }
1172
1173         iscsit_put_tpg(tpg);
1174         return count;
1175 out:
1176         iscsit_put_tpg(tpg);
1177         return -EINVAL;
1178 }
1179
1180 TF_TPG_BASE_ATTR(lio_target, enable, S_IRUGO | S_IWUSR);
1181
1182 static struct configfs_attribute *lio_target_tpg_attrs[] = {
1183         &lio_target_tpg_enable.attr,
1184         NULL,
1185 };
1186
1187 /* End items for lio_target_tpg_cit */
1188
1189 /* Start items for lio_target_tiqn_cit */
1190
1191 struct se_portal_group *lio_target_tiqn_addtpg(
1192         struct se_wwn *wwn,
1193         struct config_group *group,
1194         const char *name)
1195 {
1196         struct iscsi_portal_group *tpg;
1197         struct iscsi_tiqn *tiqn;
1198         char *tpgt_str, *end_ptr;
1199         int ret = 0;
1200         unsigned short int tpgt;
1201
1202         tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
1203         /*
1204          * Only tpgt_# directory groups can be created below
1205          * target/iscsi/iqn.superturodiskarry/
1206         */
1207         tpgt_str = strstr(name, "tpgt_");
1208         if (!tpgt_str) {
1209                 pr_err("Unable to locate \"tpgt_#\" directory"
1210                                 " group\n");
1211                 return NULL;
1212         }
1213         tpgt_str += 5; /* Skip ahead of "tpgt_" */
1214         tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0);
1215
1216         tpg = iscsit_alloc_portal_group(tiqn, tpgt);
1217         if (!tpg)
1218                 return NULL;
1219
1220         ret = core_tpg_register(
1221                         &lio_target_fabric_configfs->tf_ops,
1222                         wwn, &tpg->tpg_se_tpg, tpg,
1223                         TRANSPORT_TPG_TYPE_NORMAL);
1224         if (ret < 0)
1225                 return NULL;
1226
1227         ret = iscsit_tpg_add_portal_group(tiqn, tpg);
1228         if (ret != 0)
1229                 goto out;
1230
1231         pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
1232         pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated TPG: %s\n",
1233                         name);
1234         return &tpg->tpg_se_tpg;
1235 out:
1236         core_tpg_deregister(&tpg->tpg_se_tpg);
1237         kfree(tpg);
1238         return NULL;
1239 }
1240
1241 void lio_target_tiqn_deltpg(struct se_portal_group *se_tpg)
1242 {
1243         struct iscsi_portal_group *tpg;
1244         struct iscsi_tiqn *tiqn;
1245
1246         tpg = container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
1247         tiqn = tpg->tpg_tiqn;
1248         /*
1249          * iscsit_tpg_del_portal_group() assumes force=1
1250          */
1251         pr_debug("LIO_Target_ConfigFS: DEREGISTER -> Releasing TPG\n");
1252         iscsit_tpg_del_portal_group(tiqn, tpg, 1);
1253 }
1254
1255 /* End items for lio_target_tiqn_cit */
1256
1257 /* Start LIO-Target TIQN struct contig_item lio_target_cit */
1258
1259 static ssize_t lio_target_wwn_show_attr_lio_version(
1260         struct target_fabric_configfs *tf,
1261         char *page)
1262 {
1263         return sprintf(page, "RisingTide Systems Linux-iSCSI Target "ISCSIT_VERSION"\n");
1264 }
1265
1266 TF_WWN_ATTR_RO(lio_target, lio_version);
1267
1268 static struct configfs_attribute *lio_target_wwn_attrs[] = {
1269         &lio_target_wwn_lio_version.attr,
1270         NULL,
1271 };
1272
1273 struct se_wwn *lio_target_call_coreaddtiqn(
1274         struct target_fabric_configfs *tf,
1275         struct config_group *group,
1276         const char *name)
1277 {
1278         struct config_group *stats_cg;
1279         struct iscsi_tiqn *tiqn;
1280
1281         tiqn = iscsit_add_tiqn((unsigned char *)name);
1282         if (IS_ERR(tiqn))
1283                 return ERR_CAST(tiqn);
1284         /*
1285          * Setup struct iscsi_wwn_stat_grps for se_wwn->fabric_stat_group.
1286          */
1287         stats_cg = &tiqn->tiqn_wwn.fabric_stat_group;
1288
1289         stats_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
1290                                 GFP_KERNEL);
1291         if (!stats_cg->default_groups) {
1292                 pr_err("Unable to allocate memory for"
1293                                 " stats_cg->default_groups\n");
1294                 iscsit_del_tiqn(tiqn);
1295                 return ERR_PTR(-ENOMEM);
1296         }
1297
1298         stats_cg->default_groups[0] = &WWN_STAT_GRPS(tiqn)->iscsi_instance_group;
1299         stats_cg->default_groups[1] = &WWN_STAT_GRPS(tiqn)->iscsi_sess_err_group;
1300         stats_cg->default_groups[2] = &WWN_STAT_GRPS(tiqn)->iscsi_tgt_attr_group;
1301         stats_cg->default_groups[3] = &WWN_STAT_GRPS(tiqn)->iscsi_login_stats_group;
1302         stats_cg->default_groups[4] = &WWN_STAT_GRPS(tiqn)->iscsi_logout_stats_group;
1303         stats_cg->default_groups[5] = NULL;
1304         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_instance_group,
1305                         "iscsi_instance", &iscsi_stat_instance_cit);
1306         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_sess_err_group,
1307                         "iscsi_sess_err", &iscsi_stat_sess_err_cit);
1308         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_tgt_attr_group,
1309                         "iscsi_tgt_attr", &iscsi_stat_tgt_attr_cit);
1310         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_login_stats_group,
1311                         "iscsi_login_stats", &iscsi_stat_login_cit);
1312         config_group_init_type_name(&WWN_STAT_GRPS(tiqn)->iscsi_logout_stats_group,
1313                         "iscsi_logout_stats", &iscsi_stat_logout_cit);
1314
1315         pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
1316         pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated Node:"
1317                         " %s\n", name);
1318         return &tiqn->tiqn_wwn;
1319 }
1320
1321 void lio_target_call_coredeltiqn(
1322         struct se_wwn *wwn)
1323 {
1324         struct iscsi_tiqn *tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
1325         struct config_item *df_item;
1326         struct config_group *stats_cg;
1327         int i;
1328
1329         stats_cg = &tiqn->tiqn_wwn.fabric_stat_group;
1330         for (i = 0; stats_cg->default_groups[i]; i++) {
1331                 df_item = &stats_cg->default_groups[i]->cg_item;
1332                 stats_cg->default_groups[i] = NULL;
1333                 config_item_put(df_item);
1334         }
1335         kfree(stats_cg->default_groups);
1336
1337         pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s\n",
1338                         tiqn->tiqn);
1339         iscsit_del_tiqn(tiqn);
1340 }
1341
1342 /* End LIO-Target TIQN struct contig_lio_target_cit */
1343
1344 /* Start lio_target_discovery_auth_cit */
1345
1346 #define DEF_DISC_AUTH_STR(name, flags)                                  \
1347         __DEF_NACL_AUTH_STR(disc, name, flags)                          \
1348 static ssize_t iscsi_disc_show_##name(                                  \
1349         struct target_fabric_configfs *tf,                              \
1350         char *page)                                                     \
1351 {                                                                       \
1352         return __iscsi_disc_show_##name(&iscsit_global->discovery_acl,  \
1353                 page);                                                  \
1354 }                                                                       \
1355 static ssize_t iscsi_disc_store_##name(                                 \
1356         struct target_fabric_configfs *tf,                              \
1357         const char *page,                                               \
1358         size_t count)                                                   \
1359 {                                                                       \
1360         return __iscsi_disc_store_##name(&iscsit_global->discovery_acl, \
1361                 page, count);                                           \
1362 }
1363
1364 #define DEF_DISC_AUTH_INT(name)                                         \
1365         __DEF_NACL_AUTH_INT(disc, name)                                 \
1366 static ssize_t iscsi_disc_show_##name(                                  \
1367         struct target_fabric_configfs *tf,                              \
1368         char *page)                                                     \
1369 {                                                                       \
1370         return __iscsi_disc_show_##name(&iscsit_global->discovery_acl,  \
1371                         page);                                          \
1372 }
1373
1374 #define DISC_AUTH_ATTR(_name, _mode) TF_DISC_ATTR(iscsi, _name, _mode)
1375 #define DISC_AUTH_ATTR_RO(_name) TF_DISC_ATTR_RO(iscsi, _name)
1376
1377 /*
1378  * One-way authentication userid
1379  */
1380 DEF_DISC_AUTH_STR(userid, NAF_USERID_SET);
1381 DISC_AUTH_ATTR(userid, S_IRUGO | S_IWUSR);
1382 /*
1383  * One-way authentication password
1384  */
1385 DEF_DISC_AUTH_STR(password, NAF_PASSWORD_SET);
1386 DISC_AUTH_ATTR(password, S_IRUGO | S_IWUSR);
1387 /*
1388  * Enforce mutual authentication
1389  */
1390 DEF_DISC_AUTH_INT(authenticate_target);
1391 DISC_AUTH_ATTR_RO(authenticate_target);
1392 /*
1393  * Mutual authentication userid
1394  */
1395 DEF_DISC_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
1396 DISC_AUTH_ATTR(userid_mutual, S_IRUGO | S_IWUSR);
1397 /*
1398  * Mutual authentication password
1399  */
1400 DEF_DISC_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
1401 DISC_AUTH_ATTR(password_mutual, S_IRUGO | S_IWUSR);
1402
1403 /*
1404  * enforce_discovery_auth
1405  */
1406 static ssize_t iscsi_disc_show_enforce_discovery_auth(
1407         struct target_fabric_configfs *tf,
1408         char *page)
1409 {
1410         struct iscsi_node_auth *discovery_auth = &iscsit_global->discovery_acl.node_auth;
1411
1412         return sprintf(page, "%d\n", discovery_auth->enforce_discovery_auth);
1413 }
1414
1415 static ssize_t iscsi_disc_store_enforce_discovery_auth(
1416         struct target_fabric_configfs *tf,
1417         const char *page,
1418         size_t count)
1419 {
1420         struct iscsi_param *param;
1421         struct iscsi_portal_group *discovery_tpg = iscsit_global->discovery_tpg;
1422         char *endptr;
1423         u32 op;
1424
1425         op = simple_strtoul(page, &endptr, 0);
1426         if ((op != 1) && (op != 0)) {
1427                 pr_err("Illegal value for enforce_discovery_auth:"
1428                                 " %u\n", op);
1429                 return -EINVAL;
1430         }
1431
1432         if (!discovery_tpg) {
1433                 pr_err("iscsit_global->discovery_tpg is NULL\n");
1434                 return -EINVAL;
1435         }
1436
1437         param = iscsi_find_param_from_key(AUTHMETHOD,
1438                                 discovery_tpg->param_list);
1439         if (!param)
1440                 return -EINVAL;
1441
1442         if (op) {
1443                 /*
1444                  * Reset the AuthMethod key to CHAP.
1445                  */
1446                 if (iscsi_update_param_value(param, CHAP) < 0)
1447                         return -EINVAL;
1448
1449                 discovery_tpg->tpg_attrib.authentication = 1;
1450                 iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 1;
1451                 pr_debug("LIO-CORE[0] Successfully enabled"
1452                         " authentication enforcement for iSCSI"
1453                         " Discovery TPG\n");
1454         } else {
1455                 /*
1456                  * Reset the AuthMethod key to CHAP,None
1457                  */
1458                 if (iscsi_update_param_value(param, "CHAP,None") < 0)
1459                         return -EINVAL;
1460
1461                 discovery_tpg->tpg_attrib.authentication = 0;
1462                 iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 0;
1463                 pr_debug("LIO-CORE[0] Successfully disabled"
1464                         " authentication enforcement for iSCSI"
1465                         " Discovery TPG\n");
1466         }
1467
1468         return count;
1469 }
1470
1471 DISC_AUTH_ATTR(enforce_discovery_auth, S_IRUGO | S_IWUSR);
1472
1473 static struct configfs_attribute *lio_target_discovery_auth_attrs[] = {
1474         &iscsi_disc_userid.attr,
1475         &iscsi_disc_password.attr,
1476         &iscsi_disc_authenticate_target.attr,
1477         &iscsi_disc_userid_mutual.attr,
1478         &iscsi_disc_password_mutual.attr,
1479         &iscsi_disc_enforce_discovery_auth.attr,
1480         NULL,
1481 };
1482
1483 /* End lio_target_discovery_auth_cit */
1484
1485 /* Start functions for target_core_fabric_ops */
1486
1487 static char *iscsi_get_fabric_name(void)
1488 {
1489         return "iSCSI";
1490 }
1491
1492 static u32 iscsi_get_task_tag(struct se_cmd *se_cmd)
1493 {
1494         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1495
1496         return cmd->init_task_tag;
1497 }
1498
1499 static int iscsi_get_cmd_state(struct se_cmd *se_cmd)
1500 {
1501         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1502
1503         return cmd->i_state;
1504 }
1505
1506 static int iscsi_is_state_remove(struct se_cmd *se_cmd)
1507 {
1508         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1509
1510         return (cmd->i_state == ISTATE_REMOVE);
1511 }
1512
1513 static int lio_sess_logged_in(struct se_session *se_sess)
1514 {
1515         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1516         int ret;
1517         /*
1518          * Called with spin_lock_bh(&tpg_lock); and
1519          * spin_lock(&se_tpg->session_lock); held.
1520          */
1521         spin_lock(&sess->conn_lock);
1522         ret = (sess->session_state != TARG_SESS_STATE_LOGGED_IN);
1523         spin_unlock(&sess->conn_lock);
1524
1525         return ret;
1526 }
1527
1528 static u32 lio_sess_get_index(struct se_session *se_sess)
1529 {
1530         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1531
1532         return sess->session_index;
1533 }
1534
1535 static u32 lio_sess_get_initiator_sid(
1536         struct se_session *se_sess,
1537         unsigned char *buf,
1538         u32 size)
1539 {
1540         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1541         /*
1542          * iSCSI Initiator Session Identifier from RFC-3720.
1543          */
1544         return snprintf(buf, size, "%02x%02x%02x%02x%02x%02x",
1545                 sess->isid[0], sess->isid[1], sess->isid[2],
1546                 sess->isid[3], sess->isid[4], sess->isid[5]);
1547 }
1548
1549 static int lio_queue_data_in(struct se_cmd *se_cmd)
1550 {
1551         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1552
1553         cmd->i_state = ISTATE_SEND_DATAIN;
1554         iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
1555         return 0;
1556 }
1557
1558 static int lio_write_pending(struct se_cmd *se_cmd)
1559 {
1560         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1561
1562         if (!cmd->immediate_data && !cmd->unsolicited_data)
1563                 return iscsit_build_r2ts_for_cmd(cmd, cmd->conn, 1);
1564
1565         return 0;
1566 }
1567
1568 static int lio_write_pending_status(struct se_cmd *se_cmd)
1569 {
1570         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1571         int ret;
1572
1573         spin_lock_bh(&cmd->istate_lock);
1574         ret = !(cmd->cmd_flags & ICF_GOT_LAST_DATAOUT);
1575         spin_unlock_bh(&cmd->istate_lock);
1576
1577         return ret;
1578 }
1579
1580 static int lio_queue_status(struct se_cmd *se_cmd)
1581 {
1582         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1583
1584         cmd->i_state = ISTATE_SEND_STATUS;
1585         iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
1586         return 0;
1587 }
1588
1589 static u16 lio_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length)
1590 {
1591         unsigned char *buffer = se_cmd->sense_buffer;
1592         /*
1593          * From RFC-3720 10.4.7.  Data Segment - Sense and Response Data Segment
1594          * 16-bit SenseLength.
1595          */
1596         buffer[0] = ((sense_length >> 8) & 0xff);
1597         buffer[1] = (sense_length & 0xff);
1598         /*
1599          * Return two byte offset into allocated sense_buffer.
1600          */
1601         return 2;
1602 }
1603
1604 static u16 lio_get_fabric_sense_len(void)
1605 {
1606         /*
1607          * Return two byte offset into allocated sense_buffer.
1608          */
1609         return 2;
1610 }
1611
1612 static int lio_queue_tm_rsp(struct se_cmd *se_cmd)
1613 {
1614         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1615
1616         cmd->i_state = ISTATE_SEND_TASKMGTRSP;
1617         iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
1618         return 0;
1619 }
1620
1621 static char *lio_tpg_get_endpoint_wwn(struct se_portal_group *se_tpg)
1622 {
1623         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1624
1625         return &tpg->tpg_tiqn->tiqn[0];
1626 }
1627
1628 static u16 lio_tpg_get_tag(struct se_portal_group *se_tpg)
1629 {
1630         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1631
1632         return tpg->tpgt;
1633 }
1634
1635 static u32 lio_tpg_get_default_depth(struct se_portal_group *se_tpg)
1636 {
1637         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1638
1639         return ISCSI_TPG_ATTRIB(tpg)->default_cmdsn_depth;
1640 }
1641
1642 static int lio_tpg_check_demo_mode(struct se_portal_group *se_tpg)
1643 {
1644         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1645
1646         return ISCSI_TPG_ATTRIB(tpg)->generate_node_acls;
1647 }
1648
1649 static int lio_tpg_check_demo_mode_cache(struct se_portal_group *se_tpg)
1650 {
1651         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1652
1653         return ISCSI_TPG_ATTRIB(tpg)->cache_dynamic_acls;
1654 }
1655
1656 static int lio_tpg_check_demo_mode_write_protect(
1657         struct se_portal_group *se_tpg)
1658 {
1659         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1660
1661         return ISCSI_TPG_ATTRIB(tpg)->demo_mode_write_protect;
1662 }
1663
1664 static int lio_tpg_check_prod_mode_write_protect(
1665         struct se_portal_group *se_tpg)
1666 {
1667         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1668
1669         return ISCSI_TPG_ATTRIB(tpg)->prod_mode_write_protect;
1670 }
1671
1672 static void lio_tpg_release_fabric_acl(
1673         struct se_portal_group *se_tpg,
1674         struct se_node_acl *se_acl)
1675 {
1676         struct iscsi_node_acl *acl = container_of(se_acl,
1677                                 struct iscsi_node_acl, se_node_acl);
1678         kfree(acl);
1679 }
1680
1681 /*
1682  * Called with spin_lock_bh(struct se_portal_group->session_lock) held..
1683  *
1684  * Also, this function calls iscsit_inc_session_usage_count() on the
1685  * struct iscsi_session in question.
1686  */
1687 static int lio_tpg_shutdown_session(struct se_session *se_sess)
1688 {
1689         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1690
1691         spin_lock(&sess->conn_lock);
1692         if (atomic_read(&sess->session_fall_back_to_erl0) ||
1693             atomic_read(&sess->session_logout) ||
1694             (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
1695                 spin_unlock(&sess->conn_lock);
1696                 return 0;
1697         }
1698         atomic_set(&sess->session_reinstatement, 1);
1699         spin_unlock(&sess->conn_lock);
1700
1701         iscsit_inc_session_usage_count(sess);
1702         iscsit_stop_time2retain_timer(sess);
1703
1704         return 1;
1705 }
1706
1707 /*
1708  * Calls iscsit_dec_session_usage_count() as inverse of
1709  * lio_tpg_shutdown_session()
1710  */
1711 static void lio_tpg_close_session(struct se_session *se_sess)
1712 {
1713         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1714         /*
1715          * If the iSCSI Session for the iSCSI Initiator Node exists,
1716          * forcefully shutdown the iSCSI NEXUS.
1717          */
1718         iscsit_stop_session(sess, 1, 1);
1719         iscsit_dec_session_usage_count(sess);
1720         iscsit_close_session(sess);
1721 }
1722
1723 static void lio_tpg_stop_session(
1724         struct se_session *se_sess,
1725         int sess_sleep,
1726         int conn_sleep)
1727 {
1728         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1729
1730         iscsit_stop_session(sess, sess_sleep, conn_sleep);
1731 }
1732
1733 static void lio_tpg_fall_back_to_erl0(struct se_session *se_sess)
1734 {
1735         struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1736
1737         iscsit_fall_back_to_erl0(sess);
1738 }
1739
1740 static u32 lio_tpg_get_inst_index(struct se_portal_group *se_tpg)
1741 {
1742         struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
1743
1744         return tpg->tpg_tiqn->tiqn_index;
1745 }
1746
1747 static void lio_set_default_node_attributes(struct se_node_acl *se_acl)
1748 {
1749         struct iscsi_node_acl *acl = container_of(se_acl, struct iscsi_node_acl,
1750                                 se_node_acl);
1751
1752         ISCSI_NODE_ATTRIB(acl)->nacl = acl;
1753         iscsit_set_default_node_attribues(acl);
1754 }
1755
1756 static void lio_release_cmd(struct se_cmd *se_cmd)
1757 {
1758         struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1759
1760         iscsit_release_cmd(cmd);
1761 }
1762
1763 /* End functions for target_core_fabric_ops */
1764
1765 int iscsi_target_register_configfs(void)
1766 {
1767         struct target_fabric_configfs *fabric;
1768         int ret;
1769
1770         lio_target_fabric_configfs = NULL;
1771         fabric = target_fabric_configfs_init(THIS_MODULE, "iscsi");
1772         if (IS_ERR(fabric)) {
1773                 pr_err("target_fabric_configfs_init() for"
1774                                 " LIO-Target failed!\n");
1775                 return PTR_ERR(fabric);
1776         }
1777         /*
1778          * Setup the fabric API of function pointers used by target_core_mod..
1779          */
1780         fabric->tf_ops.get_fabric_name = &iscsi_get_fabric_name;
1781         fabric->tf_ops.get_fabric_proto_ident = &iscsi_get_fabric_proto_ident;
1782         fabric->tf_ops.tpg_get_wwn = &lio_tpg_get_endpoint_wwn;
1783         fabric->tf_ops.tpg_get_tag = &lio_tpg_get_tag;
1784         fabric->tf_ops.tpg_get_default_depth = &lio_tpg_get_default_depth;
1785         fabric->tf_ops.tpg_get_pr_transport_id = &iscsi_get_pr_transport_id;
1786         fabric->tf_ops.tpg_get_pr_transport_id_len =
1787                                 &iscsi_get_pr_transport_id_len;
1788         fabric->tf_ops.tpg_parse_pr_out_transport_id =
1789                                 &iscsi_parse_pr_out_transport_id;
1790         fabric->tf_ops.tpg_check_demo_mode = &lio_tpg_check_demo_mode;
1791         fabric->tf_ops.tpg_check_demo_mode_cache =
1792                                 &lio_tpg_check_demo_mode_cache;
1793         fabric->tf_ops.tpg_check_demo_mode_write_protect =
1794                                 &lio_tpg_check_demo_mode_write_protect;
1795         fabric->tf_ops.tpg_check_prod_mode_write_protect =
1796                                 &lio_tpg_check_prod_mode_write_protect;
1797         fabric->tf_ops.tpg_alloc_fabric_acl = &lio_tpg_alloc_fabric_acl;
1798         fabric->tf_ops.tpg_release_fabric_acl = &lio_tpg_release_fabric_acl;
1799         fabric->tf_ops.tpg_get_inst_index = &lio_tpg_get_inst_index;
1800         fabric->tf_ops.release_cmd = &lio_release_cmd;
1801         fabric->tf_ops.shutdown_session = &lio_tpg_shutdown_session;
1802         fabric->tf_ops.close_session = &lio_tpg_close_session;
1803         fabric->tf_ops.stop_session = &lio_tpg_stop_session;
1804         fabric->tf_ops.fall_back_to_erl0 = &lio_tpg_fall_back_to_erl0;
1805         fabric->tf_ops.sess_logged_in = &lio_sess_logged_in;
1806         fabric->tf_ops.sess_get_index = &lio_sess_get_index;
1807         fabric->tf_ops.sess_get_initiator_sid = &lio_sess_get_initiator_sid;
1808         fabric->tf_ops.write_pending = &lio_write_pending;
1809         fabric->tf_ops.write_pending_status = &lio_write_pending_status;
1810         fabric->tf_ops.set_default_node_attributes =
1811                                 &lio_set_default_node_attributes;
1812         fabric->tf_ops.get_task_tag = &iscsi_get_task_tag;
1813         fabric->tf_ops.get_cmd_state = &iscsi_get_cmd_state;
1814         fabric->tf_ops.queue_data_in = &lio_queue_data_in;
1815         fabric->tf_ops.queue_status = &lio_queue_status;
1816         fabric->tf_ops.queue_tm_rsp = &lio_queue_tm_rsp;
1817         fabric->tf_ops.set_fabric_sense_len = &lio_set_fabric_sense_len;
1818         fabric->tf_ops.get_fabric_sense_len = &lio_get_fabric_sense_len;
1819         fabric->tf_ops.is_state_remove = &iscsi_is_state_remove;
1820         /*
1821          * Setup function pointers for generic logic in target_core_fabric_configfs.c
1822          */
1823         fabric->tf_ops.fabric_make_wwn = &lio_target_call_coreaddtiqn;
1824         fabric->tf_ops.fabric_drop_wwn = &lio_target_call_coredeltiqn;
1825         fabric->tf_ops.fabric_make_tpg = &lio_target_tiqn_addtpg;
1826         fabric->tf_ops.fabric_drop_tpg = &lio_target_tiqn_deltpg;
1827         fabric->tf_ops.fabric_post_link = NULL;
1828         fabric->tf_ops.fabric_pre_unlink = NULL;
1829         fabric->tf_ops.fabric_make_np = &lio_target_call_addnptotpg;
1830         fabric->tf_ops.fabric_drop_np = &lio_target_call_delnpfromtpg;
1831         fabric->tf_ops.fabric_make_nodeacl = &lio_target_make_nodeacl;
1832         fabric->tf_ops.fabric_drop_nodeacl = &lio_target_drop_nodeacl;
1833         /*
1834          * Setup default attribute lists for various fabric->tf_cit_tmpl
1835          * sturct config_item_type's
1836          */
1837         TF_CIT_TMPL(fabric)->tfc_discovery_cit.ct_attrs = lio_target_discovery_auth_attrs;
1838         TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = lio_target_wwn_attrs;
1839         TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = lio_target_tpg_attrs;
1840         TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = lio_target_tpg_attrib_attrs;
1841         TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = lio_target_tpg_param_attrs;
1842         TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = lio_target_portal_attrs;
1843         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = lio_target_initiator_attrs;
1844         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = lio_target_nacl_attrib_attrs;
1845         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = lio_target_nacl_auth_attrs;
1846         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = lio_target_nacl_param_attrs;
1847
1848         ret = target_fabric_configfs_register(fabric);
1849         if (ret < 0) {
1850                 pr_err("target_fabric_configfs_register() for"
1851                                 " LIO-Target failed!\n");
1852                 target_fabric_configfs_free(fabric);
1853                 return ret;
1854         }
1855
1856         lio_target_fabric_configfs = fabric;
1857         pr_debug("LIO_TARGET[0] - Set fabric ->"
1858                         " lio_target_fabric_configfs\n");
1859         return 0;
1860 }
1861
1862
1863 void iscsi_target_deregister_configfs(void)
1864 {
1865         if (!lio_target_fabric_configfs)
1866                 return;
1867         /*
1868          * Shutdown discovery sessions and disable discovery TPG
1869          */
1870         if (iscsit_global->discovery_tpg)
1871                 iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1);
1872
1873         target_fabric_configfs_deregister(lio_target_fabric_configfs);
1874         lio_target_fabric_configfs = NULL;
1875         pr_debug("LIO_TARGET[0] - Cleared"
1876                                 " lio_target_fabric_configfs\n");
1877 }