Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * This file contains main functions related to iSCSI Parameter negotiation. |
| 3 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 4 | * (c) Copyright 2007-2013 Datera, Inc. |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 5 | * |
| 6 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | ******************************************************************************/ |
| 18 | |
| 19 | #include <linux/ctype.h> |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 20 | #include <linux/kthread.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 21 | #include <scsi/iscsi_proto.h> |
| 22 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 23 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 24 | #include <target/iscsi/iscsi_transport.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 25 | |
Sagi Grimberg | 67f091f | 2015-01-07 14:57:31 +0200 | [diff] [blame] | 26 | #include <target/iscsi/iscsi_target_core.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 27 | #include "iscsi_target_parameters.h" |
| 28 | #include "iscsi_target_login.h" |
| 29 | #include "iscsi_target_nego.h" |
| 30 | #include "iscsi_target_tpg.h" |
| 31 | #include "iscsi_target_util.h" |
| 32 | #include "iscsi_target.h" |
| 33 | #include "iscsi_target_auth.h" |
| 34 | |
| 35 | #define MAX_LOGIN_PDUS 7 |
| 36 | #define TEXT_LEN 4096 |
| 37 | |
| 38 | void convert_null_to_semi(char *buf, int len) |
| 39 | { |
| 40 | int i; |
| 41 | |
| 42 | for (i = 0; i < len; i++) |
| 43 | if (buf[i] == '\0') |
| 44 | buf[i] = ';'; |
| 45 | } |
| 46 | |
Christoph Hellwig | fceb5bc | 2012-09-26 08:00:36 -0400 | [diff] [blame] | 47 | static int strlen_semi(char *buf) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 48 | { |
| 49 | int i = 0; |
| 50 | |
| 51 | while (buf[i] != '\0') { |
| 52 | if (buf[i] == ';') |
| 53 | return i; |
| 54 | i++; |
| 55 | } |
| 56 | |
| 57 | return -1; |
| 58 | } |
| 59 | |
| 60 | int extract_param( |
| 61 | const char *in_buf, |
| 62 | const char *pattern, |
| 63 | unsigned int max_length, |
| 64 | char *out_buf, |
| 65 | unsigned char *type) |
| 66 | { |
| 67 | char *ptr; |
| 68 | int len; |
| 69 | |
| 70 | if (!in_buf || !pattern || !out_buf || !type) |
| 71 | return -1; |
| 72 | |
| 73 | ptr = strstr(in_buf, pattern); |
| 74 | if (!ptr) |
| 75 | return -1; |
| 76 | |
| 77 | ptr = strstr(ptr, "="); |
| 78 | if (!ptr) |
| 79 | return -1; |
| 80 | |
| 81 | ptr += 1; |
| 82 | if (*ptr == '0' && (*(ptr+1) == 'x' || *(ptr+1) == 'X')) { |
| 83 | ptr += 2; /* skip 0x */ |
| 84 | *type = HEX; |
| 85 | } else |
| 86 | *type = DECIMAL; |
| 87 | |
| 88 | len = strlen_semi(ptr); |
| 89 | if (len < 0) |
| 90 | return -1; |
| 91 | |
Eric Seppanen | 369653e | 2013-11-20 14:19:51 -0800 | [diff] [blame] | 92 | if (len >= max_length) { |
Masanari Iida | 5e58b02 | 2012-02-27 23:18:15 +0900 | [diff] [blame] | 93 | pr_err("Length of input: %d exceeds max_length:" |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 94 | " %d\n", len, max_length); |
| 95 | return -1; |
| 96 | } |
| 97 | memcpy(out_buf, ptr, len); |
| 98 | out_buf[len] = '\0'; |
| 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static u32 iscsi_handle_authentication( |
| 104 | struct iscsi_conn *conn, |
| 105 | char *in_buf, |
| 106 | char *out_buf, |
| 107 | int in_length, |
| 108 | int *out_length, |
| 109 | unsigned char *authtype) |
| 110 | { |
| 111 | struct iscsi_session *sess = conn->sess; |
| 112 | struct iscsi_node_auth *auth; |
| 113 | struct iscsi_node_acl *iscsi_nacl; |
Nicholas Bellinger | c3e5144 | 2013-06-19 18:48:51 -0700 | [diff] [blame] | 114 | struct iscsi_portal_group *iscsi_tpg; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 115 | struct se_node_acl *se_nacl; |
| 116 | |
| 117 | if (!sess->sess_ops->SessionType) { |
| 118 | /* |
| 119 | * For SessionType=Normal |
| 120 | */ |
| 121 | se_nacl = conn->sess->se_sess->se_node_acl; |
| 122 | if (!se_nacl) { |
| 123 | pr_err("Unable to locate struct se_node_acl for" |
| 124 | " CHAP auth\n"); |
| 125 | return -1; |
| 126 | } |
| 127 | iscsi_nacl = container_of(se_nacl, struct iscsi_node_acl, |
| 128 | se_node_acl); |
| 129 | if (!iscsi_nacl) { |
| 130 | pr_err("Unable to locate struct iscsi_node_acl for" |
| 131 | " CHAP auth\n"); |
| 132 | return -1; |
| 133 | } |
| 134 | |
Nicholas Bellinger | c3e5144 | 2013-06-19 18:48:51 -0700 | [diff] [blame] | 135 | if (se_nacl->dynamic_node_acl) { |
| 136 | iscsi_tpg = container_of(se_nacl->se_tpg, |
| 137 | struct iscsi_portal_group, tpg_se_tpg); |
| 138 | |
| 139 | auth = &iscsi_tpg->tpg_demo_auth; |
| 140 | } else { |
| 141 | iscsi_nacl = container_of(se_nacl, struct iscsi_node_acl, |
| 142 | se_node_acl); |
| 143 | |
Andy Grover | b7eec2c | 2013-10-09 11:05:57 -0700 | [diff] [blame] | 144 | auth = &iscsi_nacl->node_auth; |
Nicholas Bellinger | c3e5144 | 2013-06-19 18:48:51 -0700 | [diff] [blame] | 145 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 146 | } else { |
| 147 | /* |
| 148 | * For SessionType=Discovery |
| 149 | */ |
| 150 | auth = &iscsit_global->discovery_acl.node_auth; |
| 151 | } |
| 152 | |
| 153 | if (strstr("CHAP", authtype)) |
| 154 | strcpy(conn->sess->auth_type, "CHAP"); |
| 155 | else |
| 156 | strcpy(conn->sess->auth_type, NONE); |
| 157 | |
| 158 | if (strstr("None", authtype)) |
| 159 | return 1; |
| 160 | #ifdef CANSRP |
| 161 | else if (strstr("SRP", authtype)) |
| 162 | return srp_main_loop(conn, auth, in_buf, out_buf, |
| 163 | &in_length, out_length); |
| 164 | #endif |
| 165 | else if (strstr("CHAP", authtype)) |
| 166 | return chap_main_loop(conn, auth, in_buf, out_buf, |
| 167 | &in_length, out_length); |
| 168 | else if (strstr("SPKM1", authtype)) |
| 169 | return 2; |
| 170 | else if (strstr("SPKM2", authtype)) |
| 171 | return 2; |
| 172 | else if (strstr("KRB5", authtype)) |
| 173 | return 2; |
| 174 | else |
| 175 | return 2; |
| 176 | } |
| 177 | |
| 178 | static void iscsi_remove_failed_auth_entry(struct iscsi_conn *conn) |
| 179 | { |
| 180 | kfree(conn->auth_protocol); |
| 181 | } |
| 182 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 183 | int iscsi_target_check_login_request( |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 184 | struct iscsi_conn *conn, |
| 185 | struct iscsi_login *login) |
| 186 | { |
Jörn Engel | 2816890 | 2012-03-15 15:06:58 -0400 | [diff] [blame] | 187 | int req_csg, req_nsg; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 188 | u32 payload_length; |
| 189 | struct iscsi_login_req *login_req; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 190 | |
| 191 | login_req = (struct iscsi_login_req *) login->req; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 192 | payload_length = ntoh24(login_req->dlength); |
| 193 | |
| 194 | switch (login_req->opcode & ISCSI_OPCODE_MASK) { |
| 195 | case ISCSI_OP_LOGIN: |
| 196 | break; |
| 197 | default: |
| 198 | pr_err("Received unknown opcode 0x%02x.\n", |
| 199 | login_req->opcode & ISCSI_OPCODE_MASK); |
| 200 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 201 | ISCSI_LOGIN_STATUS_INIT_ERR); |
| 202 | return -1; |
| 203 | } |
| 204 | |
| 205 | if ((login_req->flags & ISCSI_FLAG_LOGIN_CONTINUE) && |
| 206 | (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) { |
| 207 | pr_err("Login request has both ISCSI_FLAG_LOGIN_CONTINUE" |
| 208 | " and ISCSI_FLAG_LOGIN_TRANSIT set, protocol error.\n"); |
| 209 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 210 | ISCSI_LOGIN_STATUS_INIT_ERR); |
| 211 | return -1; |
| 212 | } |
| 213 | |
Andy Grover | 5d35806 | 2013-03-04 13:52:08 -0800 | [diff] [blame] | 214 | req_csg = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); |
| 215 | req_nsg = ISCSI_LOGIN_NEXT_STAGE(login_req->flags); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 216 | |
| 217 | if (req_csg != login->current_stage) { |
| 218 | pr_err("Initiator unexpectedly changed login stage" |
| 219 | " from %d to %d, login failed.\n", login->current_stage, |
| 220 | req_csg); |
| 221 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 222 | ISCSI_LOGIN_STATUS_INIT_ERR); |
| 223 | return -1; |
| 224 | } |
| 225 | |
| 226 | if ((req_nsg == 2) || (req_csg >= 2) || |
| 227 | ((login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT) && |
| 228 | (req_nsg <= req_csg))) { |
| 229 | pr_err("Illegal login_req->flags Combination, CSG: %d," |
| 230 | " NSG: %d, ISCSI_FLAG_LOGIN_TRANSIT: %d.\n", req_csg, |
| 231 | req_nsg, (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)); |
| 232 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 233 | ISCSI_LOGIN_STATUS_INIT_ERR); |
| 234 | return -1; |
| 235 | } |
| 236 | |
| 237 | if ((login_req->max_version != login->version_max) || |
| 238 | (login_req->min_version != login->version_min)) { |
| 239 | pr_err("Login request changed Version Max/Nin" |
| 240 | " unexpectedly to 0x%02x/0x%02x, protocol error\n", |
| 241 | login_req->max_version, login_req->min_version); |
| 242 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 243 | ISCSI_LOGIN_STATUS_INIT_ERR); |
| 244 | return -1; |
| 245 | } |
| 246 | |
| 247 | if (memcmp(login_req->isid, login->isid, 6) != 0) { |
| 248 | pr_err("Login request changed ISID unexpectedly," |
| 249 | " protocol error.\n"); |
| 250 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 251 | ISCSI_LOGIN_STATUS_INIT_ERR); |
| 252 | return -1; |
| 253 | } |
| 254 | |
| 255 | if (login_req->itt != login->init_task_tag) { |
| 256 | pr_err("Login request changed ITT unexpectedly to" |
| 257 | " 0x%08x, protocol error.\n", login_req->itt); |
| 258 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 259 | ISCSI_LOGIN_STATUS_INIT_ERR); |
| 260 | return -1; |
| 261 | } |
| 262 | |
| 263 | if (payload_length > MAX_KEY_VALUE_PAIRS) { |
| 264 | pr_err("Login request payload exceeds default" |
| 265 | " MaxRecvDataSegmentLength: %u, protocol error.\n", |
| 266 | MAX_KEY_VALUE_PAIRS); |
| 267 | return -1; |
| 268 | } |
| 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static int iscsi_target_check_first_request( |
| 274 | struct iscsi_conn *conn, |
| 275 | struct iscsi_login *login) |
| 276 | { |
| 277 | struct iscsi_param *param = NULL; |
| 278 | struct se_node_acl *se_nacl; |
| 279 | |
| 280 | login->first_request = 0; |
| 281 | |
| 282 | list_for_each_entry(param, &conn->param_list->param_list, p_list) { |
| 283 | if (!strncmp(param->name, SESSIONTYPE, 11)) { |
| 284 | if (!IS_PSTATE_ACCEPTOR(param)) { |
| 285 | pr_err("SessionType key not received" |
| 286 | " in first login request.\n"); |
| 287 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 288 | ISCSI_LOGIN_STATUS_MISSING_FIELDS); |
| 289 | return -1; |
| 290 | } |
| 291 | if (!strncmp(param->value, DISCOVERY, 9)) |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | if (!strncmp(param->name, INITIATORNAME, 13)) { |
| 296 | if (!IS_PSTATE_ACCEPTOR(param)) { |
| 297 | if (!login->leading_connection) |
| 298 | continue; |
| 299 | |
| 300 | pr_err("InitiatorName key not received" |
| 301 | " in first login request.\n"); |
| 302 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 303 | ISCSI_LOGIN_STATUS_MISSING_FIELDS); |
| 304 | return -1; |
| 305 | } |
| 306 | |
| 307 | /* |
| 308 | * For non-leading connections, double check that the |
| 309 | * received InitiatorName matches the existing session's |
| 310 | * struct iscsi_node_acl. |
| 311 | */ |
| 312 | if (!login->leading_connection) { |
| 313 | se_nacl = conn->sess->se_sess->se_node_acl; |
| 314 | if (!se_nacl) { |
| 315 | pr_err("Unable to locate" |
| 316 | " struct se_node_acl\n"); |
| 317 | iscsit_tx_login_rsp(conn, |
| 318 | ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 319 | ISCSI_LOGIN_STATUS_TGT_NOT_FOUND); |
| 320 | return -1; |
| 321 | } |
| 322 | |
| 323 | if (strcmp(param->value, |
| 324 | se_nacl->initiatorname)) { |
| 325 | pr_err("Incorrect" |
| 326 | " InitiatorName: %s for this" |
| 327 | " iSCSI Initiator Node.\n", |
| 328 | param->value); |
| 329 | iscsit_tx_login_rsp(conn, |
| 330 | ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 331 | ISCSI_LOGIN_STATUS_TGT_NOT_FOUND); |
| 332 | return -1; |
| 333 | } |
| 334 | } |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_login *login) |
| 342 | { |
| 343 | u32 padding = 0; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 344 | struct iscsi_login_rsp *login_rsp; |
| 345 | |
| 346 | login_rsp = (struct iscsi_login_rsp *) login->rsp; |
| 347 | |
| 348 | login_rsp->opcode = ISCSI_OP_LOGIN_RSP; |
| 349 | hton24(login_rsp->dlength, login->rsp_length); |
| 350 | memcpy(login_rsp->isid, login->isid, 6); |
| 351 | login_rsp->tsih = cpu_to_be16(login->tsih); |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 352 | login_rsp->itt = login->init_task_tag; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 353 | login_rsp->statsn = cpu_to_be32(conn->stat_sn++); |
| 354 | login_rsp->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); |
Roland Dreier | 109e238 | 2015-07-23 14:53:32 -0700 | [diff] [blame] | 355 | login_rsp->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 356 | |
| 357 | pr_debug("Sending Login Response, Flags: 0x%02x, ITT: 0x%08x," |
| 358 | " ExpCmdSN; 0x%08x, MaxCmdSN: 0x%08x, StatSN: 0x%08x, Length:" |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 359 | " %u\n", login_rsp->flags, (__force u32)login_rsp->itt, |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 360 | ntohl(login_rsp->exp_cmdsn), ntohl(login_rsp->max_cmdsn), |
| 361 | ntohl(login_rsp->statsn), login->rsp_length); |
| 362 | |
| 363 | padding = ((-login->rsp_length) & 3); |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 364 | /* |
| 365 | * Before sending the last login response containing the transition |
| 366 | * bit for full-feature-phase, go ahead and start up TX/RX threads |
| 367 | * now to avoid potential resource allocation failures after the |
| 368 | * final login response has been sent. |
| 369 | */ |
| 370 | if (login->login_complete) { |
| 371 | int rc = iscsit_start_kthreads(conn); |
| 372 | if (rc) { |
| 373 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 374 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 375 | return -1; |
| 376 | } |
| 377 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 378 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 379 | if (conn->conn_transport->iscsit_put_login_tx(conn, login, |
| 380 | login->rsp_length + padding) < 0) |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 381 | goto err; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 382 | |
| 383 | login->rsp_length = 0; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 384 | |
| 385 | return 0; |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 386 | |
| 387 | err: |
| 388 | if (login->login_complete) { |
| 389 | if (conn->rx_thread && conn->rx_thread_active) { |
| 390 | send_sig(SIGINT, conn->rx_thread, 1); |
Nicholas Bellinger | ca82c2b | 2015-11-05 14:11:59 -0800 | [diff] [blame] | 391 | complete(&conn->rx_login_comp); |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 392 | kthread_stop(conn->rx_thread); |
| 393 | } |
| 394 | if (conn->tx_thread && conn->tx_thread_active) { |
| 395 | send_sig(SIGINT, conn->tx_thread, 1); |
| 396 | kthread_stop(conn->tx_thread); |
| 397 | } |
| 398 | spin_lock(&iscsit_global->ts_bitmap_lock); |
| 399 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, |
| 400 | get_order(1)); |
| 401 | spin_unlock(&iscsit_global->ts_bitmap_lock); |
| 402 | } |
| 403 | return -1; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 404 | } |
| 405 | |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 406 | static void iscsi_target_sk_data_ready(struct sock *sk) |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 407 | { |
| 408 | struct iscsi_conn *conn = sk->sk_user_data; |
| 409 | bool rc; |
| 410 | |
| 411 | pr_debug("Entering iscsi_target_sk_data_ready: conn: %p\n", conn); |
| 412 | |
| 413 | write_lock_bh(&sk->sk_callback_lock); |
| 414 | if (!sk->sk_user_data) { |
| 415 | write_unlock_bh(&sk->sk_callback_lock); |
| 416 | return; |
| 417 | } |
| 418 | if (!test_bit(LOGIN_FLAGS_READY, &conn->login_flags)) { |
| 419 | write_unlock_bh(&sk->sk_callback_lock); |
| 420 | pr_debug("Got LOGIN_FLAGS_READY=0, conn: %p >>>>\n", conn); |
| 421 | return; |
| 422 | } |
| 423 | if (test_bit(LOGIN_FLAGS_CLOSED, &conn->login_flags)) { |
| 424 | write_unlock_bh(&sk->sk_callback_lock); |
| 425 | pr_debug("Got LOGIN_FLAGS_CLOSED=1, conn: %p >>>>\n", conn); |
| 426 | return; |
| 427 | } |
| 428 | if (test_and_set_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags)) { |
| 429 | write_unlock_bh(&sk->sk_callback_lock); |
| 430 | pr_debug("Got LOGIN_FLAGS_READ_ACTIVE=1, conn: %p >>>>\n", conn); |
| 431 | return; |
| 432 | } |
| 433 | |
| 434 | rc = schedule_delayed_work(&conn->login_work, 0); |
Christophe Vu-Brugier | 0bcc297 | 2014-06-06 17:15:16 +0200 | [diff] [blame] | 435 | if (!rc) { |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 436 | pr_debug("iscsi_target_sk_data_ready, schedule_delayed_work" |
| 437 | " got false\n"); |
| 438 | } |
| 439 | write_unlock_bh(&sk->sk_callback_lock); |
| 440 | } |
| 441 | |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 442 | static void iscsi_target_sk_state_change(struct sock *); |
| 443 | |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 444 | static void iscsi_target_set_sock_callbacks(struct iscsi_conn *conn) |
| 445 | { |
| 446 | struct sock *sk; |
| 447 | |
| 448 | if (!conn->sock) |
| 449 | return; |
| 450 | |
| 451 | sk = conn->sock->sk; |
| 452 | pr_debug("Entering iscsi_target_set_sock_callbacks: conn: %p\n", conn); |
| 453 | |
| 454 | write_lock_bh(&sk->sk_callback_lock); |
| 455 | sk->sk_user_data = conn; |
| 456 | conn->orig_data_ready = sk->sk_data_ready; |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 457 | conn->orig_state_change = sk->sk_state_change; |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 458 | sk->sk_data_ready = iscsi_target_sk_data_ready; |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 459 | sk->sk_state_change = iscsi_target_sk_state_change; |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 460 | write_unlock_bh(&sk->sk_callback_lock); |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 461 | |
| 462 | sk->sk_sndtimeo = TA_LOGIN_TIMEOUT * HZ; |
| 463 | sk->sk_rcvtimeo = TA_LOGIN_TIMEOUT * HZ; |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | static void iscsi_target_restore_sock_callbacks(struct iscsi_conn *conn) |
| 467 | { |
| 468 | struct sock *sk; |
| 469 | |
| 470 | if (!conn->sock) |
| 471 | return; |
| 472 | |
| 473 | sk = conn->sock->sk; |
| 474 | pr_debug("Entering iscsi_target_restore_sock_callbacks: conn: %p\n", conn); |
| 475 | |
| 476 | write_lock_bh(&sk->sk_callback_lock); |
| 477 | if (!sk->sk_user_data) { |
| 478 | write_unlock_bh(&sk->sk_callback_lock); |
| 479 | return; |
| 480 | } |
| 481 | sk->sk_user_data = NULL; |
| 482 | sk->sk_data_ready = conn->orig_data_ready; |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 483 | sk->sk_state_change = conn->orig_state_change; |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 484 | write_unlock_bh(&sk->sk_callback_lock); |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 485 | |
| 486 | sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT; |
| 487 | sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT; |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | static int iscsi_target_do_login(struct iscsi_conn *, struct iscsi_login *); |
| 491 | |
| 492 | static bool iscsi_target_sk_state_check(struct sock *sk) |
| 493 | { |
| 494 | if (sk->sk_state == TCP_CLOSE_WAIT || sk->sk_state == TCP_CLOSE) { |
| 495 | pr_debug("iscsi_target_sk_state_check: TCP_CLOSE_WAIT|TCP_CLOSE," |
| 496 | "returning FALSE\n"); |
| 497 | return false; |
| 498 | } |
| 499 | return true; |
| 500 | } |
| 501 | |
| 502 | static void iscsi_target_login_drop(struct iscsi_conn *conn, struct iscsi_login *login) |
| 503 | { |
| 504 | struct iscsi_np *np = login->np; |
| 505 | bool zero_tsih = login->zero_tsih; |
| 506 | |
| 507 | iscsi_remove_failed_auth_entry(conn); |
| 508 | iscsi_target_nego_release(conn); |
| 509 | iscsi_target_login_sess_out(conn, np, zero_tsih, true); |
| 510 | } |
| 511 | |
| 512 | static void iscsi_target_login_timeout(unsigned long data) |
| 513 | { |
| 514 | struct iscsi_conn *conn = (struct iscsi_conn *)data; |
| 515 | |
| 516 | pr_debug("Entering iscsi_target_login_timeout >>>>>>>>>>>>>>>>>>>\n"); |
| 517 | |
| 518 | if (conn->login_kworker) { |
| 519 | pr_debug("Sending SIGINT to conn->login_kworker %s/%d\n", |
| 520 | conn->login_kworker->comm, conn->login_kworker->pid); |
| 521 | send_sig(SIGINT, conn->login_kworker, 1); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | static void iscsi_target_do_login_rx(struct work_struct *work) |
| 526 | { |
| 527 | struct iscsi_conn *conn = container_of(work, |
| 528 | struct iscsi_conn, login_work.work); |
| 529 | struct iscsi_login *login = conn->login; |
| 530 | struct iscsi_np *np = login->np; |
| 531 | struct iscsi_portal_group *tpg = conn->tpg; |
| 532 | struct iscsi_tpg_np *tpg_np = conn->tpg_np; |
| 533 | struct timer_list login_timer; |
| 534 | int rc, zero_tsih = login->zero_tsih; |
| 535 | bool state; |
| 536 | |
| 537 | pr_debug("entering iscsi_target_do_login_rx, conn: %p, %s:%d\n", |
| 538 | conn, current->comm, current->pid); |
| 539 | |
| 540 | spin_lock(&tpg->tpg_state_lock); |
| 541 | state = (tpg->tpg_state == TPG_STATE_ACTIVE); |
| 542 | spin_unlock(&tpg->tpg_state_lock); |
| 543 | |
Christophe Vu-Brugier | 0bcc297 | 2014-06-06 17:15:16 +0200 | [diff] [blame] | 544 | if (!state) { |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 545 | pr_debug("iscsi_target_do_login_rx: tpg_state != TPG_STATE_ACTIVE\n"); |
| 546 | iscsi_target_restore_sock_callbacks(conn); |
| 547 | iscsi_target_login_drop(conn, login); |
| 548 | iscsit_deaccess_np(np, tpg, tpg_np); |
| 549 | return; |
| 550 | } |
| 551 | |
| 552 | if (conn->sock) { |
| 553 | struct sock *sk = conn->sock->sk; |
| 554 | |
| 555 | read_lock_bh(&sk->sk_callback_lock); |
| 556 | state = iscsi_target_sk_state_check(sk); |
| 557 | read_unlock_bh(&sk->sk_callback_lock); |
| 558 | |
Christophe Vu-Brugier | 0bcc297 | 2014-06-06 17:15:16 +0200 | [diff] [blame] | 559 | if (!state) { |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 560 | pr_debug("iscsi_target_do_login_rx, TCP state CLOSE\n"); |
| 561 | iscsi_target_restore_sock_callbacks(conn); |
| 562 | iscsi_target_login_drop(conn, login); |
| 563 | iscsit_deaccess_np(np, tpg, tpg_np); |
| 564 | return; |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | conn->login_kworker = current; |
| 569 | allow_signal(SIGINT); |
| 570 | |
| 571 | init_timer(&login_timer); |
| 572 | login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); |
| 573 | login_timer.data = (unsigned long)conn; |
| 574 | login_timer.function = iscsi_target_login_timeout; |
| 575 | add_timer(&login_timer); |
| 576 | pr_debug("Starting login_timer for %s/%d\n", current->comm, current->pid); |
| 577 | |
| 578 | rc = conn->conn_transport->iscsit_get_login_rx(conn, login); |
| 579 | del_timer_sync(&login_timer); |
| 580 | flush_signals(current); |
| 581 | conn->login_kworker = NULL; |
| 582 | |
| 583 | if (rc < 0) { |
| 584 | iscsi_target_restore_sock_callbacks(conn); |
| 585 | iscsi_target_login_drop(conn, login); |
| 586 | iscsit_deaccess_np(np, tpg, tpg_np); |
| 587 | return; |
| 588 | } |
| 589 | |
| 590 | pr_debug("iscsi_target_do_login_rx after rx_login_io, %p, %s:%d\n", |
| 591 | conn, current->comm, current->pid); |
| 592 | |
| 593 | rc = iscsi_target_do_login(conn, login); |
| 594 | if (rc < 0) { |
| 595 | iscsi_target_restore_sock_callbacks(conn); |
| 596 | iscsi_target_login_drop(conn, login); |
| 597 | iscsit_deaccess_np(np, tpg, tpg_np); |
| 598 | } else if (!rc) { |
| 599 | if (conn->sock) { |
| 600 | struct sock *sk = conn->sock->sk; |
| 601 | |
| 602 | write_lock_bh(&sk->sk_callback_lock); |
| 603 | clear_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags); |
| 604 | write_unlock_bh(&sk->sk_callback_lock); |
| 605 | } |
| 606 | } else if (rc == 1) { |
| 607 | iscsi_target_nego_release(conn); |
| 608 | iscsi_post_login_handler(np, conn, zero_tsih); |
| 609 | iscsit_deaccess_np(np, tpg, tpg_np); |
| 610 | } |
| 611 | } |
| 612 | |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 613 | static void iscsi_target_do_cleanup(struct work_struct *work) |
| 614 | { |
| 615 | struct iscsi_conn *conn = container_of(work, |
| 616 | struct iscsi_conn, login_cleanup_work.work); |
| 617 | struct sock *sk = conn->sock->sk; |
| 618 | struct iscsi_login *login = conn->login; |
| 619 | struct iscsi_np *np = login->np; |
| 620 | struct iscsi_portal_group *tpg = conn->tpg; |
| 621 | struct iscsi_tpg_np *tpg_np = conn->tpg_np; |
| 622 | |
| 623 | pr_debug("Entering iscsi_target_do_cleanup\n"); |
| 624 | |
| 625 | cancel_delayed_work_sync(&conn->login_work); |
| 626 | conn->orig_state_change(sk); |
| 627 | |
| 628 | iscsi_target_restore_sock_callbacks(conn); |
| 629 | iscsi_target_login_drop(conn, login); |
| 630 | iscsit_deaccess_np(np, tpg, tpg_np); |
| 631 | |
| 632 | pr_debug("iscsi_target_do_cleanup done()\n"); |
| 633 | } |
| 634 | |
| 635 | static void iscsi_target_sk_state_change(struct sock *sk) |
| 636 | { |
| 637 | struct iscsi_conn *conn; |
| 638 | void (*orig_state_change)(struct sock *); |
| 639 | bool state; |
| 640 | |
| 641 | pr_debug("Entering iscsi_target_sk_state_change\n"); |
| 642 | |
| 643 | write_lock_bh(&sk->sk_callback_lock); |
| 644 | conn = sk->sk_user_data; |
| 645 | if (!conn) { |
| 646 | write_unlock_bh(&sk->sk_callback_lock); |
| 647 | return; |
| 648 | } |
| 649 | orig_state_change = conn->orig_state_change; |
| 650 | |
| 651 | if (!test_bit(LOGIN_FLAGS_READY, &conn->login_flags)) { |
| 652 | pr_debug("Got LOGIN_FLAGS_READY=0 sk_state_change conn: %p\n", |
| 653 | conn); |
| 654 | write_unlock_bh(&sk->sk_callback_lock); |
| 655 | orig_state_change(sk); |
| 656 | return; |
| 657 | } |
| 658 | if (test_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags)) { |
| 659 | pr_debug("Got LOGIN_FLAGS_READ_ACTIVE=1 sk_state_change" |
| 660 | " conn: %p\n", conn); |
| 661 | write_unlock_bh(&sk->sk_callback_lock); |
| 662 | orig_state_change(sk); |
| 663 | return; |
| 664 | } |
| 665 | if (test_and_set_bit(LOGIN_FLAGS_CLOSED, &conn->login_flags)) { |
| 666 | pr_debug("Got LOGIN_FLAGS_CLOSED=1 sk_state_change conn: %p\n", |
| 667 | conn); |
| 668 | write_unlock_bh(&sk->sk_callback_lock); |
| 669 | orig_state_change(sk); |
| 670 | return; |
| 671 | } |
| 672 | |
| 673 | state = iscsi_target_sk_state_check(sk); |
| 674 | write_unlock_bh(&sk->sk_callback_lock); |
| 675 | |
| 676 | pr_debug("iscsi_target_sk_state_change: state: %d\n", state); |
| 677 | |
| 678 | if (!state) { |
| 679 | pr_debug("iscsi_target_sk_state_change got failed state\n"); |
| 680 | schedule_delayed_work(&conn->login_cleanup_work, 0); |
| 681 | return; |
| 682 | } |
| 683 | orig_state_change(sk); |
| 684 | } |
| 685 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 686 | /* |
| 687 | * NOTE: We check for existing sessions or connections AFTER the initiator |
| 688 | * has been successfully authenticated in order to protect against faked |
| 689 | * ISID/TSIH combinations. |
| 690 | */ |
| 691 | static int iscsi_target_check_for_existing_instances( |
| 692 | struct iscsi_conn *conn, |
| 693 | struct iscsi_login *login) |
| 694 | { |
| 695 | if (login->checked_for_existing) |
| 696 | return 0; |
| 697 | |
| 698 | login->checked_for_existing = 1; |
| 699 | |
| 700 | if (!login->tsih) |
| 701 | return iscsi_check_for_session_reinstatement(conn); |
| 702 | else |
| 703 | return iscsi_login_post_auth_non_zero_tsih(conn, login->cid, |
| 704 | login->initial_exp_statsn); |
| 705 | } |
| 706 | |
| 707 | static int iscsi_target_do_authentication( |
| 708 | struct iscsi_conn *conn, |
| 709 | struct iscsi_login *login) |
| 710 | { |
| 711 | int authret; |
| 712 | u32 payload_length; |
| 713 | struct iscsi_param *param; |
| 714 | struct iscsi_login_req *login_req; |
| 715 | struct iscsi_login_rsp *login_rsp; |
| 716 | |
| 717 | login_req = (struct iscsi_login_req *) login->req; |
| 718 | login_rsp = (struct iscsi_login_rsp *) login->rsp; |
| 719 | payload_length = ntoh24(login_req->dlength); |
| 720 | |
| 721 | param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list); |
| 722 | if (!param) |
| 723 | return -1; |
| 724 | |
| 725 | authret = iscsi_handle_authentication( |
| 726 | conn, |
| 727 | login->req_buf, |
| 728 | login->rsp_buf, |
| 729 | payload_length, |
| 730 | &login->rsp_length, |
| 731 | param->value); |
| 732 | switch (authret) { |
| 733 | case 0: |
| 734 | pr_debug("Received OK response" |
| 735 | " from LIO Authentication, continuing.\n"); |
| 736 | break; |
| 737 | case 1: |
| 738 | pr_debug("iSCSI security negotiation" |
Joe Perches | bfb9035 | 2011-08-17 06:58:04 -0700 | [diff] [blame] | 739 | " completed successfully.\n"); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 740 | login->auth_complete = 1; |
| 741 | if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) && |
| 742 | (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) { |
| 743 | login_rsp->flags |= (ISCSI_FLAG_LOGIN_NEXT_STAGE1 | |
| 744 | ISCSI_FLAG_LOGIN_TRANSIT); |
| 745 | login->current_stage = 1; |
| 746 | } |
| 747 | return iscsi_target_check_for_existing_instances( |
| 748 | conn, login); |
| 749 | case 2: |
| 750 | pr_err("Security negotiation" |
| 751 | " failed.\n"); |
| 752 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 753 | ISCSI_LOGIN_STATUS_AUTH_FAILED); |
| 754 | return -1; |
| 755 | default: |
| 756 | pr_err("Received unknown error %d from LIO" |
| 757 | " Authentication\n", authret); |
| 758 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 759 | ISCSI_LOGIN_STATUS_TARGET_ERROR); |
| 760 | return -1; |
| 761 | } |
| 762 | |
| 763 | return 0; |
| 764 | } |
| 765 | |
| 766 | static int iscsi_target_handle_csg_zero( |
| 767 | struct iscsi_conn *conn, |
| 768 | struct iscsi_login *login) |
| 769 | { |
| 770 | int ret; |
| 771 | u32 payload_length; |
| 772 | struct iscsi_param *param; |
| 773 | struct iscsi_login_req *login_req; |
| 774 | struct iscsi_login_rsp *login_rsp; |
| 775 | |
| 776 | login_req = (struct iscsi_login_req *) login->req; |
| 777 | login_rsp = (struct iscsi_login_rsp *) login->rsp; |
| 778 | payload_length = ntoh24(login_req->dlength); |
| 779 | |
| 780 | param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list); |
| 781 | if (!param) |
| 782 | return -1; |
| 783 | |
| 784 | ret = iscsi_decode_text_input( |
| 785 | PHASE_SECURITY|PHASE_DECLARATIVE, |
| 786 | SENDER_INITIATOR|SENDER_RECEIVER, |
| 787 | login->req_buf, |
| 788 | payload_length, |
Nicholas Bellinger | 9977bb1 | 2012-09-29 21:49:59 -0700 | [diff] [blame] | 789 | conn); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 790 | if (ret < 0) |
| 791 | return -1; |
| 792 | |
| 793 | if (ret > 0) { |
| 794 | if (login->auth_complete) { |
| 795 | pr_err("Initiator has already been" |
| 796 | " successfully authenticated, but is still" |
| 797 | " sending %s keys.\n", param->value); |
| 798 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 799 | ISCSI_LOGIN_STATUS_INIT_ERR); |
| 800 | return -1; |
| 801 | } |
| 802 | |
| 803 | goto do_auth; |
Nicholas Bellinger | 91f0abf | 2014-05-28 12:07:40 -0700 | [diff] [blame] | 804 | } else if (!payload_length) { |
| 805 | pr_err("Initiator sent zero length security payload," |
| 806 | " login failed\n"); |
| 807 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 808 | ISCSI_LOGIN_STATUS_AUTH_FAILED); |
| 809 | return -1; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 810 | } |
| 811 | |
| 812 | if (login->first_request) |
| 813 | if (iscsi_target_check_first_request(conn, login) < 0) |
| 814 | return -1; |
| 815 | |
| 816 | ret = iscsi_encode_text_output( |
| 817 | PHASE_SECURITY|PHASE_DECLARATIVE, |
| 818 | SENDER_TARGET, |
| 819 | login->rsp_buf, |
| 820 | &login->rsp_length, |
| 821 | conn->param_list); |
| 822 | if (ret < 0) |
| 823 | return -1; |
| 824 | |
| 825 | if (!iscsi_check_negotiated_keys(conn->param_list)) { |
Andy Grover | 60bfcf8 | 2013-10-09 11:05:58 -0700 | [diff] [blame] | 826 | if (conn->tpg->tpg_attrib.authentication && |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 827 | !strncmp(param->value, NONE, 4)) { |
| 828 | pr_err("Initiator sent AuthMethod=None but" |
| 829 | " Target is enforcing iSCSI Authentication," |
| 830 | " login failed.\n"); |
| 831 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 832 | ISCSI_LOGIN_STATUS_AUTH_FAILED); |
| 833 | return -1; |
| 834 | } |
| 835 | |
Andy Grover | 60bfcf8 | 2013-10-09 11:05:58 -0700 | [diff] [blame] | 836 | if (conn->tpg->tpg_attrib.authentication && |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 837 | !login->auth_complete) |
| 838 | return 0; |
| 839 | |
| 840 | if (strncmp(param->value, NONE, 4) && !login->auth_complete) |
| 841 | return 0; |
| 842 | |
| 843 | if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) && |
| 844 | (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) { |
| 845 | login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE1 | |
| 846 | ISCSI_FLAG_LOGIN_TRANSIT; |
| 847 | login->current_stage = 1; |
| 848 | } |
| 849 | } |
| 850 | |
| 851 | return 0; |
| 852 | do_auth: |
| 853 | return iscsi_target_do_authentication(conn, login); |
| 854 | } |
| 855 | |
| 856 | static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_login *login) |
| 857 | { |
| 858 | int ret; |
| 859 | u32 payload_length; |
| 860 | struct iscsi_login_req *login_req; |
| 861 | struct iscsi_login_rsp *login_rsp; |
| 862 | |
| 863 | login_req = (struct iscsi_login_req *) login->req; |
| 864 | login_rsp = (struct iscsi_login_rsp *) login->rsp; |
| 865 | payload_length = ntoh24(login_req->dlength); |
| 866 | |
| 867 | ret = iscsi_decode_text_input( |
| 868 | PHASE_OPERATIONAL|PHASE_DECLARATIVE, |
| 869 | SENDER_INITIATOR|SENDER_RECEIVER, |
| 870 | login->req_buf, |
| 871 | payload_length, |
Nicholas Bellinger | 9977bb1 | 2012-09-29 21:49:59 -0700 | [diff] [blame] | 872 | conn); |
Roland Dreier | 1c5c12c | 2012-11-05 18:02:42 -0800 | [diff] [blame] | 873 | if (ret < 0) { |
| 874 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 875 | ISCSI_LOGIN_STATUS_INIT_ERR); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 876 | return -1; |
Roland Dreier | 1c5c12c | 2012-11-05 18:02:42 -0800 | [diff] [blame] | 877 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 878 | |
| 879 | if (login->first_request) |
| 880 | if (iscsi_target_check_first_request(conn, login) < 0) |
| 881 | return -1; |
| 882 | |
| 883 | if (iscsi_target_check_for_existing_instances(conn, login) < 0) |
| 884 | return -1; |
| 885 | |
| 886 | ret = iscsi_encode_text_output( |
| 887 | PHASE_OPERATIONAL|PHASE_DECLARATIVE, |
| 888 | SENDER_TARGET, |
| 889 | login->rsp_buf, |
| 890 | &login->rsp_length, |
| 891 | conn->param_list); |
Roland Dreier | 1c5c12c | 2012-11-05 18:02:42 -0800 | [diff] [blame] | 892 | if (ret < 0) { |
| 893 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 894 | ISCSI_LOGIN_STATUS_INIT_ERR); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 895 | return -1; |
Roland Dreier | 1c5c12c | 2012-11-05 18:02:42 -0800 | [diff] [blame] | 896 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 897 | |
| 898 | if (!login->auth_complete && |
Andy Grover | 60bfcf8 | 2013-10-09 11:05:58 -0700 | [diff] [blame] | 899 | conn->tpg->tpg_attrib.authentication) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 900 | pr_err("Initiator is requesting CSG: 1, has not been" |
| 901 | " successfully authenticated, and the Target is" |
| 902 | " enforcing iSCSI Authentication, login failed.\n"); |
| 903 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 904 | ISCSI_LOGIN_STATUS_AUTH_FAILED); |
| 905 | return -1; |
| 906 | } |
| 907 | |
| 908 | if (!iscsi_check_negotiated_keys(conn->param_list)) |
| 909 | if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE3) && |
| 910 | (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) |
| 911 | login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE3 | |
| 912 | ISCSI_FLAG_LOGIN_TRANSIT; |
| 913 | |
| 914 | return 0; |
| 915 | } |
| 916 | |
| 917 | static int iscsi_target_do_login(struct iscsi_conn *conn, struct iscsi_login *login) |
| 918 | { |
| 919 | int pdu_count = 0; |
| 920 | struct iscsi_login_req *login_req; |
| 921 | struct iscsi_login_rsp *login_rsp; |
| 922 | |
| 923 | login_req = (struct iscsi_login_req *) login->req; |
| 924 | login_rsp = (struct iscsi_login_rsp *) login->rsp; |
| 925 | |
| 926 | while (1) { |
| 927 | if (++pdu_count > MAX_LOGIN_PDUS) { |
| 928 | pr_err("MAX_LOGIN_PDUS count reached.\n"); |
| 929 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 930 | ISCSI_LOGIN_STATUS_TARGET_ERROR); |
| 931 | return -1; |
| 932 | } |
| 933 | |
Andy Grover | 5d35806 | 2013-03-04 13:52:08 -0800 | [diff] [blame] | 934 | switch (ISCSI_LOGIN_CURRENT_STAGE(login_req->flags)) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 935 | case 0: |
Andy Grover | 5d35806 | 2013-03-04 13:52:08 -0800 | [diff] [blame] | 936 | login_rsp->flags &= ~ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 937 | if (iscsi_target_handle_csg_zero(conn, login) < 0) |
| 938 | return -1; |
| 939 | break; |
| 940 | case 1: |
| 941 | login_rsp->flags |= ISCSI_FLAG_LOGIN_CURRENT_STAGE1; |
| 942 | if (iscsi_target_handle_csg_one(conn, login) < 0) |
| 943 | return -1; |
| 944 | if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) { |
| 945 | login->tsih = conn->sess->tsih; |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 946 | login->login_complete = 1; |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 947 | iscsi_target_restore_sock_callbacks(conn); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 948 | if (iscsi_target_do_tx_login_io(conn, |
| 949 | login) < 0) |
| 950 | return -1; |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 951 | return 1; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 952 | } |
| 953 | break; |
| 954 | default: |
| 955 | pr_err("Illegal CSG: %d received from" |
| 956 | " Initiator, protocol error.\n", |
Andy Grover | 5d35806 | 2013-03-04 13:52:08 -0800 | [diff] [blame] | 957 | ISCSI_LOGIN_CURRENT_STAGE(login_req->flags)); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 958 | break; |
| 959 | } |
| 960 | |
Nicholas Bellinger | ea3a179 | 2013-09-05 14:55:37 -0700 | [diff] [blame] | 961 | if (iscsi_target_do_tx_login_io(conn, login) < 0) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 962 | return -1; |
| 963 | |
| 964 | if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) { |
| 965 | login_rsp->flags &= ~ISCSI_FLAG_LOGIN_TRANSIT; |
| 966 | login_rsp->flags &= ~ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK; |
| 967 | } |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 968 | break; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 969 | } |
| 970 | |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 971 | if (conn->sock) { |
| 972 | struct sock *sk = conn->sock->sk; |
| 973 | bool state; |
| 974 | |
| 975 | read_lock_bh(&sk->sk_callback_lock); |
| 976 | state = iscsi_target_sk_state_check(sk); |
| 977 | read_unlock_bh(&sk->sk_callback_lock); |
| 978 | |
| 979 | if (!state) { |
| 980 | pr_debug("iscsi_target_do_login() failed state for" |
| 981 | " conn: %p\n", conn); |
| 982 | return -1; |
| 983 | } |
| 984 | } |
| 985 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 986 | return 0; |
| 987 | } |
| 988 | |
| 989 | static void iscsi_initiatorname_tolower( |
| 990 | char *param_buf) |
| 991 | { |
| 992 | char *c; |
| 993 | u32 iqn_size = strlen(param_buf), i; |
| 994 | |
| 995 | for (i = 0; i < iqn_size; i++) { |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 996 | c = ¶m_buf[i]; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 997 | if (!isupper(*c)) |
| 998 | continue; |
| 999 | |
| 1000 | *c = tolower(*c); |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * Processes the first Login Request.. |
| 1006 | */ |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1007 | int iscsi_target_locate_portal( |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1008 | struct iscsi_np *np, |
| 1009 | struct iscsi_conn *conn, |
| 1010 | struct iscsi_login *login) |
| 1011 | { |
| 1012 | char *i_buf = NULL, *s_buf = NULL, *t_buf = NULL; |
| 1013 | char *tmpbuf, *start = NULL, *end = NULL, *key, *value; |
| 1014 | struct iscsi_session *sess = conn->sess; |
| 1015 | struct iscsi_tiqn *tiqn; |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1016 | struct iscsi_tpg_np *tpg_np = NULL; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1017 | struct iscsi_login_req *login_req; |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 1018 | struct se_node_acl *se_nacl; |
| 1019 | u32 payload_length, queue_depth = 0; |
| 1020 | int sessiontype = 0, ret = 0, tag_num, tag_size; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1021 | |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1022 | INIT_DELAYED_WORK(&conn->login_work, iscsi_target_do_login_rx); |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 1023 | INIT_DELAYED_WORK(&conn->login_cleanup_work, iscsi_target_do_cleanup); |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1024 | iscsi_target_set_sock_callbacks(conn); |
| 1025 | |
| 1026 | login->np = np; |
| 1027 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1028 | login_req = (struct iscsi_login_req *) login->req; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1029 | payload_length = ntoh24(login_req->dlength); |
| 1030 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1031 | tmpbuf = kzalloc(payload_length + 1, GFP_KERNEL); |
| 1032 | if (!tmpbuf) { |
| 1033 | pr_err("Unable to allocate memory for tmpbuf.\n"); |
| 1034 | return -1; |
| 1035 | } |
| 1036 | |
| 1037 | memcpy(tmpbuf, login->req_buf, payload_length); |
| 1038 | tmpbuf[payload_length] = '\0'; |
| 1039 | start = tmpbuf; |
| 1040 | end = (start + payload_length); |
| 1041 | |
| 1042 | /* |
| 1043 | * Locate the initial keys expected from the Initiator node in |
| 1044 | * the first login request in order to progress with the login phase. |
| 1045 | */ |
| 1046 | while (start < end) { |
| 1047 | if (iscsi_extract_key_value(start, &key, &value) < 0) { |
| 1048 | ret = -1; |
| 1049 | goto out; |
| 1050 | } |
| 1051 | |
| 1052 | if (!strncmp(key, "InitiatorName", 13)) |
| 1053 | i_buf = value; |
| 1054 | else if (!strncmp(key, "SessionType", 11)) |
| 1055 | s_buf = value; |
| 1056 | else if (!strncmp(key, "TargetName", 10)) |
| 1057 | t_buf = value; |
| 1058 | |
| 1059 | start += strlen(key) + strlen(value) + 2; |
| 1060 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1061 | /* |
| 1062 | * See 5.3. Login Phase. |
| 1063 | */ |
| 1064 | if (!i_buf) { |
| 1065 | pr_err("InitiatorName key not received" |
| 1066 | " in first login request.\n"); |
| 1067 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 1068 | ISCSI_LOGIN_STATUS_MISSING_FIELDS); |
| 1069 | ret = -1; |
| 1070 | goto out; |
| 1071 | } |
| 1072 | /* |
| 1073 | * Convert the incoming InitiatorName to lowercase following |
| 1074 | * RFC-3720 3.2.6.1. section c) that says that iSCSI IQNs |
| 1075 | * are NOT case sensitive. |
| 1076 | */ |
| 1077 | iscsi_initiatorname_tolower(i_buf); |
| 1078 | |
| 1079 | if (!s_buf) { |
| 1080 | if (!login->leading_connection) |
| 1081 | goto get_target; |
| 1082 | |
| 1083 | pr_err("SessionType key not received" |
| 1084 | " in first login request.\n"); |
| 1085 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 1086 | ISCSI_LOGIN_STATUS_MISSING_FIELDS); |
| 1087 | ret = -1; |
| 1088 | goto out; |
| 1089 | } |
| 1090 | |
| 1091 | /* |
| 1092 | * Use default portal group for discovery sessions. |
| 1093 | */ |
| 1094 | sessiontype = strncmp(s_buf, DISCOVERY, 9); |
| 1095 | if (!sessiontype) { |
| 1096 | conn->tpg = iscsit_global->discovery_tpg; |
| 1097 | if (!login->leading_connection) |
| 1098 | goto get_target; |
| 1099 | |
| 1100 | sess->sess_ops->SessionType = 1; |
| 1101 | /* |
| 1102 | * Setup crc32c modules from libcrypto |
| 1103 | */ |
| 1104 | if (iscsi_login_setup_crypto(conn) < 0) { |
| 1105 | pr_err("iscsi_login_setup_crypto() failed\n"); |
| 1106 | ret = -1; |
| 1107 | goto out; |
| 1108 | } |
| 1109 | /* |
| 1110 | * Serialize access across the discovery struct iscsi_portal_group to |
| 1111 | * process login attempt. |
| 1112 | */ |
| 1113 | if (iscsit_access_np(np, conn->tpg) < 0) { |
| 1114 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 1115 | ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); |
| 1116 | ret = -1; |
| 1117 | goto out; |
| 1118 | } |
| 1119 | ret = 0; |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 1120 | goto alloc_tags; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | get_target: |
| 1124 | if (!t_buf) { |
| 1125 | pr_err("TargetName key not received" |
| 1126 | " in first login request while" |
| 1127 | " SessionType=Normal.\n"); |
| 1128 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 1129 | ISCSI_LOGIN_STATUS_MISSING_FIELDS); |
| 1130 | ret = -1; |
| 1131 | goto out; |
| 1132 | } |
| 1133 | |
| 1134 | /* |
| 1135 | * Locate Target IQN from Storage Node. |
| 1136 | */ |
| 1137 | tiqn = iscsit_get_tiqn_for_login(t_buf); |
| 1138 | if (!tiqn) { |
| 1139 | pr_err("Unable to locate Target IQN: %s in" |
| 1140 | " Storage Node\n", t_buf); |
| 1141 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 1142 | ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); |
| 1143 | ret = -1; |
| 1144 | goto out; |
| 1145 | } |
| 1146 | pr_debug("Located Storage Object: %s\n", tiqn->tiqn); |
| 1147 | |
| 1148 | /* |
| 1149 | * Locate Target Portal Group from Storage Node. |
| 1150 | */ |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1151 | conn->tpg = iscsit_get_tpg_from_np(tiqn, np, &tpg_np); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1152 | if (!conn->tpg) { |
| 1153 | pr_err("Unable to locate Target Portal Group" |
| 1154 | " on %s\n", tiqn->tiqn); |
| 1155 | iscsit_put_tiqn_for_login(tiqn); |
| 1156 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 1157 | ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); |
| 1158 | ret = -1; |
| 1159 | goto out; |
| 1160 | } |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1161 | conn->tpg_np = tpg_np; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1162 | pr_debug("Located Portal Group Object: %hu\n", conn->tpg->tpgt); |
| 1163 | /* |
| 1164 | * Setup crc32c modules from libcrypto |
| 1165 | */ |
| 1166 | if (iscsi_login_setup_crypto(conn) < 0) { |
| 1167 | pr_err("iscsi_login_setup_crypto() failed\n"); |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1168 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); |
| 1169 | iscsit_put_tiqn_for_login(tiqn); |
| 1170 | conn->tpg = NULL; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1171 | ret = -1; |
| 1172 | goto out; |
| 1173 | } |
| 1174 | /* |
| 1175 | * Serialize access across the struct iscsi_portal_group to |
| 1176 | * process login attempt. |
| 1177 | */ |
| 1178 | if (iscsit_access_np(np, conn->tpg) < 0) { |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1179 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1180 | iscsit_put_tiqn_for_login(tiqn); |
| 1181 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 1182 | ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1183 | conn->tpg = NULL; |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1184 | ret = -1; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1185 | goto out; |
| 1186 | } |
| 1187 | |
| 1188 | /* |
| 1189 | * conn->sess->node_acl will be set when the referenced |
| 1190 | * struct iscsi_session is located from received ISID+TSIH in |
| 1191 | * iscsi_login_non_zero_tsih_s2(). |
| 1192 | */ |
| 1193 | if (!login->leading_connection) { |
| 1194 | ret = 0; |
| 1195 | goto out; |
| 1196 | } |
| 1197 | |
| 1198 | /* |
| 1199 | * This value is required in iscsi_login_zero_tsih_s2() |
| 1200 | */ |
| 1201 | sess->sess_ops->SessionType = 0; |
| 1202 | |
| 1203 | /* |
| 1204 | * Locate incoming Initiator IQN reference from Storage Node. |
| 1205 | */ |
| 1206 | sess->se_sess->se_node_acl = core_tpg_check_initiator_node_acl( |
| 1207 | &conn->tpg->tpg_se_tpg, i_buf); |
| 1208 | if (!sess->se_sess->se_node_acl) { |
| 1209 | pr_err("iSCSI Initiator Node: %s is not authorized to" |
| 1210 | " access iSCSI target portal group: %hu.\n", |
| 1211 | i_buf, conn->tpg->tpgt); |
| 1212 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 1213 | ISCSI_LOGIN_STATUS_TGT_FORBIDDEN); |
| 1214 | ret = -1; |
| 1215 | goto out; |
| 1216 | } |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 1217 | se_nacl = sess->se_sess->se_node_acl; |
| 1218 | queue_depth = se_nacl->queue_depth; |
| 1219 | /* |
| 1220 | * Setup pre-allocated tags based upon allowed per NodeACL CmdSN |
| 1221 | * depth for non immediate commands, plus extra tags for immediate |
| 1222 | * commands. |
| 1223 | * |
| 1224 | * Also enforce a ISCSIT_MIN_TAGS to prevent unnecessary contention |
| 1225 | * in per-cpu-ida tag allocation logic + small queue_depth. |
| 1226 | */ |
| 1227 | alloc_tags: |
| 1228 | tag_num = max_t(u32, ISCSIT_MIN_TAGS, queue_depth); |
Nicholas Bellinger | 4a4caa2 | 2014-01-10 02:06:59 +0000 | [diff] [blame] | 1229 | tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 1230 | tag_size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1231 | |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 1232 | ret = transport_alloc_session_tags(sess->se_sess, tag_num, tag_size); |
| 1233 | if (ret < 0) { |
| 1234 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 1235 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 1236 | ret = -1; |
| 1237 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1238 | out: |
| 1239 | kfree(tmpbuf); |
| 1240 | return ret; |
| 1241 | } |
| 1242 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1243 | int iscsi_target_start_negotiation( |
| 1244 | struct iscsi_login *login, |
| 1245 | struct iscsi_conn *conn) |
| 1246 | { |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1247 | int ret; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1248 | |
| 1249 | ret = iscsi_target_do_login(conn, login); |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1250 | if (!ret) { |
| 1251 | if (conn->sock) { |
| 1252 | struct sock *sk = conn->sock->sk; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1253 | |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1254 | write_lock_bh(&sk->sk_callback_lock); |
| 1255 | set_bit(LOGIN_FLAGS_READY, &conn->login_flags); |
| 1256 | write_unlock_bh(&sk->sk_callback_lock); |
| 1257 | } |
| 1258 | } else if (ret < 0) { |
| 1259 | cancel_delayed_work_sync(&conn->login_work); |
Nicholas Bellinger | bb04835 | 2013-09-05 14:54:04 -0700 | [diff] [blame] | 1260 | cancel_delayed_work_sync(&conn->login_cleanup_work); |
Nicholas Bellinger | d381a80 | 2013-08-15 13:40:17 -0700 | [diff] [blame] | 1261 | iscsi_target_restore_sock_callbacks(conn); |
| 1262 | iscsi_remove_failed_auth_entry(conn); |
| 1263 | } |
| 1264 | if (ret != 0) |
| 1265 | iscsi_target_nego_release(conn); |
| 1266 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1267 | return ret; |
| 1268 | } |
| 1269 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1270 | void iscsi_target_nego_release(struct iscsi_conn *conn) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1271 | { |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1272 | struct iscsi_login *login = conn->conn_login; |
| 1273 | |
| 1274 | if (!login) |
| 1275 | return; |
| 1276 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1277 | kfree(login->req_buf); |
| 1278 | kfree(login->rsp_buf); |
| 1279 | kfree(login); |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1280 | |
| 1281 | conn->conn_login = NULL; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1282 | } |