Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * This file contains the iSCSI Target specific utility functions. |
| 3 | * |
| 4 | * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. |
| 5 | * |
| 6 | * Licensed to the Linux Foundation under the General Public License (GPL) version 2. |
| 7 | * |
| 8 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | ******************************************************************************/ |
| 20 | |
| 21 | #include <linux/list.h> |
| 22 | #include <scsi/scsi_tcq.h> |
| 23 | #include <scsi/iscsi_proto.h> |
| 24 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 25 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 26 | #include <target/target_core_configfs.h> |
| 27 | |
| 28 | #include "iscsi_target_core.h" |
| 29 | #include "iscsi_target_parameters.h" |
| 30 | #include "iscsi_target_seq_pdu_list.h" |
| 31 | #include "iscsi_target_datain_values.h" |
| 32 | #include "iscsi_target_erl0.h" |
| 33 | #include "iscsi_target_erl1.h" |
| 34 | #include "iscsi_target_erl2.h" |
| 35 | #include "iscsi_target_tpg.h" |
| 36 | #include "iscsi_target_tq.h" |
| 37 | #include "iscsi_target_util.h" |
| 38 | #include "iscsi_target.h" |
| 39 | |
| 40 | #define PRINT_BUFF(buff, len) \ |
| 41 | { \ |
| 42 | int zzz; \ |
| 43 | \ |
| 44 | pr_debug("%d:\n", __LINE__); \ |
| 45 | for (zzz = 0; zzz < len; zzz++) { \ |
| 46 | if (zzz % 16 == 0) { \ |
| 47 | if (zzz) \ |
| 48 | pr_debug("\n"); \ |
| 49 | pr_debug("%4i: ", zzz); \ |
| 50 | } \ |
| 51 | pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ |
| 52 | } \ |
| 53 | if ((len + 1) % 16) \ |
| 54 | pr_debug("\n"); \ |
| 55 | } |
| 56 | |
| 57 | extern struct list_head g_tiqn_list; |
| 58 | extern spinlock_t tiqn_lock; |
| 59 | |
| 60 | /* |
| 61 | * Called with cmd->r2t_lock held. |
| 62 | */ |
| 63 | int iscsit_add_r2t_to_list( |
| 64 | struct iscsi_cmd *cmd, |
| 65 | u32 offset, |
| 66 | u32 xfer_len, |
| 67 | int recovery, |
| 68 | u32 r2t_sn) |
| 69 | { |
| 70 | struct iscsi_r2t *r2t; |
| 71 | |
| 72 | r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); |
| 73 | if (!r2t) { |
| 74 | pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); |
| 75 | return -1; |
| 76 | } |
| 77 | INIT_LIST_HEAD(&r2t->r2t_list); |
| 78 | |
| 79 | r2t->recovery_r2t = recovery; |
| 80 | r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; |
| 81 | r2t->offset = offset; |
| 82 | r2t->xfer_len = xfer_len; |
| 83 | list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); |
| 84 | spin_unlock_bh(&cmd->r2t_lock); |
| 85 | |
| 86 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); |
| 87 | |
| 88 | spin_lock_bh(&cmd->r2t_lock); |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | struct iscsi_r2t *iscsit_get_r2t_for_eos( |
| 93 | struct iscsi_cmd *cmd, |
| 94 | u32 offset, |
| 95 | u32 length) |
| 96 | { |
| 97 | struct iscsi_r2t *r2t; |
| 98 | |
| 99 | spin_lock_bh(&cmd->r2t_lock); |
| 100 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { |
| 101 | if ((r2t->offset <= offset) && |
| 102 | (r2t->offset + r2t->xfer_len) >= (offset + length)) { |
| 103 | spin_unlock_bh(&cmd->r2t_lock); |
| 104 | return r2t; |
| 105 | } |
| 106 | } |
| 107 | spin_unlock_bh(&cmd->r2t_lock); |
| 108 | |
| 109 | pr_err("Unable to locate R2T for Offset: %u, Length:" |
| 110 | " %u\n", offset, length); |
| 111 | return NULL; |
| 112 | } |
| 113 | |
| 114 | struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) |
| 115 | { |
| 116 | struct iscsi_r2t *r2t; |
| 117 | |
| 118 | spin_lock_bh(&cmd->r2t_lock); |
| 119 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { |
| 120 | if (!r2t->sent_r2t) { |
| 121 | spin_unlock_bh(&cmd->r2t_lock); |
| 122 | return r2t; |
| 123 | } |
| 124 | } |
| 125 | spin_unlock_bh(&cmd->r2t_lock); |
| 126 | |
| 127 | pr_err("Unable to locate next R2T to send for ITT:" |
| 128 | " 0x%08x.\n", cmd->init_task_tag); |
| 129 | return NULL; |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * Called with cmd->r2t_lock held. |
| 134 | */ |
| 135 | void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) |
| 136 | { |
| 137 | list_del(&r2t->r2t_list); |
| 138 | kmem_cache_free(lio_r2t_cache, r2t); |
| 139 | } |
| 140 | |
| 141 | void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) |
| 142 | { |
| 143 | struct iscsi_r2t *r2t, *r2t_tmp; |
| 144 | |
| 145 | spin_lock_bh(&cmd->r2t_lock); |
| 146 | list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) |
| 147 | iscsit_free_r2t(r2t, cmd); |
| 148 | spin_unlock_bh(&cmd->r2t_lock); |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | * May be called from software interrupt (timer) context for allocating |
| 153 | * iSCSI NopINs. |
| 154 | */ |
| 155 | struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) |
| 156 | { |
| 157 | struct iscsi_cmd *cmd; |
| 158 | |
| 159 | cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask); |
| 160 | if (!cmd) { |
| 161 | pr_err("Unable to allocate memory for struct iscsi_cmd.\n"); |
| 162 | return NULL; |
| 163 | } |
| 164 | |
| 165 | cmd->conn = conn; |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 166 | INIT_LIST_HEAD(&cmd->i_conn_node); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 167 | INIT_LIST_HEAD(&cmd->datain_list); |
| 168 | INIT_LIST_HEAD(&cmd->cmd_r2t_list); |
| 169 | init_completion(&cmd->reject_comp); |
| 170 | spin_lock_init(&cmd->datain_lock); |
| 171 | spin_lock_init(&cmd->dataout_timeout_lock); |
| 172 | spin_lock_init(&cmd->istate_lock); |
| 173 | spin_lock_init(&cmd->error_lock); |
| 174 | spin_lock_init(&cmd->r2t_lock); |
| 175 | |
| 176 | return cmd; |
| 177 | } |
| 178 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 179 | struct iscsi_seq *iscsit_get_seq_holder_for_datain( |
| 180 | struct iscsi_cmd *cmd, |
| 181 | u32 seq_send_order) |
| 182 | { |
| 183 | u32 i; |
| 184 | |
| 185 | for (i = 0; i < cmd->seq_count; i++) |
| 186 | if (cmd->seq_list[i].seq_send_order == seq_send_order) |
| 187 | return &cmd->seq_list[i]; |
| 188 | |
| 189 | return NULL; |
| 190 | } |
| 191 | |
| 192 | struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) |
| 193 | { |
| 194 | u32 i; |
| 195 | |
| 196 | if (!cmd->seq_list) { |
| 197 | pr_err("struct iscsi_cmd->seq_list is NULL!\n"); |
| 198 | return NULL; |
| 199 | } |
| 200 | |
| 201 | for (i = 0; i < cmd->seq_count; i++) { |
| 202 | if (cmd->seq_list[i].type != SEQTYPE_NORMAL) |
| 203 | continue; |
| 204 | if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { |
| 205 | cmd->seq_send_order++; |
| 206 | return &cmd->seq_list[i]; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | return NULL; |
| 211 | } |
| 212 | |
| 213 | struct iscsi_r2t *iscsit_get_holder_for_r2tsn( |
| 214 | struct iscsi_cmd *cmd, |
| 215 | u32 r2t_sn) |
| 216 | { |
| 217 | struct iscsi_r2t *r2t; |
| 218 | |
| 219 | spin_lock_bh(&cmd->r2t_lock); |
| 220 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { |
| 221 | if (r2t->r2t_sn == r2t_sn) { |
| 222 | spin_unlock_bh(&cmd->r2t_lock); |
| 223 | return r2t; |
| 224 | } |
| 225 | } |
| 226 | spin_unlock_bh(&cmd->r2t_lock); |
| 227 | |
| 228 | return NULL; |
| 229 | } |
| 230 | |
| 231 | static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) |
| 232 | { |
| 233 | int ret; |
| 234 | |
| 235 | /* |
| 236 | * This is the proper method of checking received CmdSN against |
| 237 | * ExpCmdSN and MaxCmdSN values, as well as accounting for out |
| 238 | * or order CmdSNs due to multiple connection sessions and/or |
| 239 | * CRC failures. |
| 240 | */ |
| 241 | if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { |
| 242 | pr_err("Received CmdSN: 0x%08x is greater than" |
| 243 | " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn, |
| 244 | sess->max_cmd_sn); |
| 245 | ret = CMDSN_ERROR_CANNOT_RECOVER; |
| 246 | |
| 247 | } else if (cmdsn == sess->exp_cmd_sn) { |
| 248 | sess->exp_cmd_sn++; |
| 249 | pr_debug("Received CmdSN matches ExpCmdSN," |
| 250 | " incremented ExpCmdSN to: 0x%08x\n", |
| 251 | sess->exp_cmd_sn); |
| 252 | ret = CMDSN_NORMAL_OPERATION; |
| 253 | |
| 254 | } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { |
| 255 | pr_debug("Received CmdSN: 0x%08x is greater" |
| 256 | " than ExpCmdSN: 0x%08x, not acknowledging.\n", |
| 257 | cmdsn, sess->exp_cmd_sn); |
| 258 | ret = CMDSN_HIGHER_THAN_EXP; |
| 259 | |
| 260 | } else { |
| 261 | pr_err("Received CmdSN: 0x%08x is less than" |
| 262 | " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, |
| 263 | sess->exp_cmd_sn); |
| 264 | ret = CMDSN_LOWER_THAN_EXP; |
| 265 | } |
| 266 | |
| 267 | return ret; |
| 268 | } |
| 269 | |
| 270 | /* |
| 271 | * Commands may be received out of order if MC/S is in use. |
| 272 | * Ensure they are executed in CmdSN order. |
| 273 | */ |
| 274 | int iscsit_sequence_cmd( |
| 275 | struct iscsi_conn *conn, |
| 276 | struct iscsi_cmd *cmd, |
Christoph Hellwig | 50e5c87 | 2012-09-26 08:00:40 -0400 | [diff] [blame] | 277 | __be32 cmdsn) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 278 | { |
| 279 | int ret; |
| 280 | int cmdsn_ret; |
| 281 | |
| 282 | mutex_lock(&conn->sess->cmdsn_mutex); |
| 283 | |
Christoph Hellwig | 50e5c87 | 2012-09-26 08:00:40 -0400 | [diff] [blame] | 284 | cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 285 | switch (cmdsn_ret) { |
| 286 | case CMDSN_NORMAL_OPERATION: |
| 287 | ret = iscsit_execute_cmd(cmd, 0); |
| 288 | if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) |
| 289 | iscsit_execute_ooo_cmdsns(conn->sess); |
| 290 | break; |
| 291 | case CMDSN_HIGHER_THAN_EXP: |
Christoph Hellwig | 50e5c87 | 2012-09-26 08:00:40 -0400 | [diff] [blame] | 292 | ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 293 | break; |
| 294 | case CMDSN_LOWER_THAN_EXP: |
| 295 | cmd->i_state = ISTATE_REMOVE; |
| 296 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); |
| 297 | ret = cmdsn_ret; |
| 298 | break; |
| 299 | default: |
| 300 | ret = cmdsn_ret; |
| 301 | break; |
| 302 | } |
| 303 | mutex_unlock(&conn->sess->cmdsn_mutex); |
| 304 | |
| 305 | return ret; |
| 306 | } |
| 307 | |
| 308 | int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) |
| 309 | { |
| 310 | struct iscsi_conn *conn = cmd->conn; |
| 311 | struct se_cmd *se_cmd = &cmd->se_cmd; |
| 312 | struct iscsi_data *hdr = (struct iscsi_data *) buf; |
| 313 | u32 payload_length = ntoh24(hdr->dlength); |
| 314 | |
| 315 | if (conn->sess->sess_ops->InitialR2T) { |
| 316 | pr_err("Received unexpected unsolicited data" |
| 317 | " while InitialR2T=Yes, protocol error.\n"); |
| 318 | transport_send_check_condition_and_sense(se_cmd, |
| 319 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); |
| 320 | return -1; |
| 321 | } |
| 322 | |
| 323 | if ((cmd->first_burst_len + payload_length) > |
| 324 | conn->sess->sess_ops->FirstBurstLength) { |
| 325 | pr_err("Total %u bytes exceeds FirstBurstLength: %u" |
| 326 | " for this Unsolicited DataOut Burst.\n", |
| 327 | (cmd->first_burst_len + payload_length), |
| 328 | conn->sess->sess_ops->FirstBurstLength); |
| 329 | transport_send_check_condition_and_sense(se_cmd, |
| 330 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); |
| 331 | return -1; |
| 332 | } |
| 333 | |
| 334 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) |
| 335 | return 0; |
| 336 | |
Andy Grover | ebf1d95 | 2012-04-03 15:51:24 -0700 | [diff] [blame] | 337 | if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 338 | ((cmd->first_burst_len + payload_length) != |
| 339 | conn->sess->sess_ops->FirstBurstLength)) { |
| 340 | pr_err("Unsolicited non-immediate data received %u" |
| 341 | " does not equal FirstBurstLength: %u, and does" |
| 342 | " not equal ExpXferLen %u.\n", |
| 343 | (cmd->first_burst_len + payload_length), |
Andy Grover | ebf1d95 | 2012-04-03 15:51:24 -0700 | [diff] [blame] | 344 | conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 345 | transport_send_check_condition_and_sense(se_cmd, |
| 346 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); |
| 347 | return -1; |
| 348 | } |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | struct iscsi_cmd *iscsit_find_cmd_from_itt( |
| 353 | struct iscsi_conn *conn, |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 354 | itt_t init_task_tag) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 355 | { |
| 356 | struct iscsi_cmd *cmd; |
| 357 | |
| 358 | spin_lock_bh(&conn->cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 359 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 360 | if (cmd->init_task_tag == init_task_tag) { |
| 361 | spin_unlock_bh(&conn->cmd_lock); |
| 362 | return cmd; |
| 363 | } |
| 364 | } |
| 365 | spin_unlock_bh(&conn->cmd_lock); |
| 366 | |
| 367 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu", |
| 368 | init_task_tag, conn->cid); |
| 369 | return NULL; |
| 370 | } |
| 371 | |
| 372 | struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( |
| 373 | struct iscsi_conn *conn, |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 374 | itt_t init_task_tag, |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 375 | u32 length) |
| 376 | { |
| 377 | struct iscsi_cmd *cmd; |
| 378 | |
| 379 | spin_lock_bh(&conn->cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 380 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 381 | if (cmd->init_task_tag == init_task_tag) { |
| 382 | spin_unlock_bh(&conn->cmd_lock); |
| 383 | return cmd; |
| 384 | } |
| 385 | } |
| 386 | spin_unlock_bh(&conn->cmd_lock); |
| 387 | |
| 388 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu," |
| 389 | " dumping payload\n", init_task_tag, conn->cid); |
| 390 | if (length) |
| 391 | iscsit_dump_data_payload(conn, length, 1); |
| 392 | |
| 393 | return NULL; |
| 394 | } |
| 395 | |
| 396 | struct iscsi_cmd *iscsit_find_cmd_from_ttt( |
| 397 | struct iscsi_conn *conn, |
| 398 | u32 targ_xfer_tag) |
| 399 | { |
| 400 | struct iscsi_cmd *cmd = NULL; |
| 401 | |
| 402 | spin_lock_bh(&conn->cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 403 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 404 | if (cmd->targ_xfer_tag == targ_xfer_tag) { |
| 405 | spin_unlock_bh(&conn->cmd_lock); |
| 406 | return cmd; |
| 407 | } |
| 408 | } |
| 409 | spin_unlock_bh(&conn->cmd_lock); |
| 410 | |
| 411 | pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", |
| 412 | targ_xfer_tag, conn->cid); |
| 413 | return NULL; |
| 414 | } |
| 415 | |
| 416 | int iscsit_find_cmd_for_recovery( |
| 417 | struct iscsi_session *sess, |
| 418 | struct iscsi_cmd **cmd_ptr, |
| 419 | struct iscsi_conn_recovery **cr_ptr, |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 420 | itt_t init_task_tag) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 421 | { |
| 422 | struct iscsi_cmd *cmd = NULL; |
| 423 | struct iscsi_conn_recovery *cr; |
| 424 | /* |
| 425 | * Scan through the inactive connection recovery list's command list. |
| 426 | * If init_task_tag matches the command is still alligent. |
| 427 | */ |
| 428 | spin_lock(&sess->cr_i_lock); |
| 429 | list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { |
| 430 | spin_lock(&cr->conn_recovery_cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 431 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 432 | if (cmd->init_task_tag == init_task_tag) { |
| 433 | spin_unlock(&cr->conn_recovery_cmd_lock); |
| 434 | spin_unlock(&sess->cr_i_lock); |
| 435 | |
| 436 | *cr_ptr = cr; |
| 437 | *cmd_ptr = cmd; |
| 438 | return -2; |
| 439 | } |
| 440 | } |
| 441 | spin_unlock(&cr->conn_recovery_cmd_lock); |
| 442 | } |
| 443 | spin_unlock(&sess->cr_i_lock); |
| 444 | /* |
| 445 | * Scan through the active connection recovery list's command list. |
| 446 | * If init_task_tag matches the command is ready to be reassigned. |
| 447 | */ |
| 448 | spin_lock(&sess->cr_a_lock); |
| 449 | list_for_each_entry(cr, &sess->cr_active_list, cr_list) { |
| 450 | spin_lock(&cr->conn_recovery_cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 451 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 452 | if (cmd->init_task_tag == init_task_tag) { |
| 453 | spin_unlock(&cr->conn_recovery_cmd_lock); |
| 454 | spin_unlock(&sess->cr_a_lock); |
| 455 | |
| 456 | *cr_ptr = cr; |
| 457 | *cmd_ptr = cmd; |
| 458 | return 0; |
| 459 | } |
| 460 | } |
| 461 | spin_unlock(&cr->conn_recovery_cmd_lock); |
| 462 | } |
| 463 | spin_unlock(&sess->cr_a_lock); |
| 464 | |
| 465 | return -1; |
| 466 | } |
| 467 | |
| 468 | void iscsit_add_cmd_to_immediate_queue( |
| 469 | struct iscsi_cmd *cmd, |
| 470 | struct iscsi_conn *conn, |
| 471 | u8 state) |
| 472 | { |
| 473 | struct iscsi_queue_req *qr; |
| 474 | |
| 475 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); |
| 476 | if (!qr) { |
| 477 | pr_err("Unable to allocate memory for" |
| 478 | " struct iscsi_queue_req\n"); |
| 479 | return; |
| 480 | } |
| 481 | INIT_LIST_HEAD(&qr->qr_list); |
| 482 | qr->cmd = cmd; |
| 483 | qr->state = state; |
| 484 | |
| 485 | spin_lock_bh(&conn->immed_queue_lock); |
| 486 | list_add_tail(&qr->qr_list, &conn->immed_queue_list); |
| 487 | atomic_inc(&cmd->immed_queue_count); |
| 488 | atomic_set(&conn->check_immediate_queue, 1); |
| 489 | spin_unlock_bh(&conn->immed_queue_lock); |
| 490 | |
Roland Dreier | d5627ac | 2012-10-31 09:16:46 -0700 | [diff] [blame] | 491 | wake_up(&conn->queues_wq); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 492 | } |
| 493 | |
| 494 | struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) |
| 495 | { |
| 496 | struct iscsi_queue_req *qr; |
| 497 | |
| 498 | spin_lock_bh(&conn->immed_queue_lock); |
| 499 | if (list_empty(&conn->immed_queue_list)) { |
| 500 | spin_unlock_bh(&conn->immed_queue_lock); |
| 501 | return NULL; |
| 502 | } |
Roland Dreier | 1f981de | 2012-10-31 09:16:47 -0700 | [diff] [blame] | 503 | qr = list_first_entry(&conn->immed_queue_list, |
| 504 | struct iscsi_queue_req, qr_list); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 505 | |
| 506 | list_del(&qr->qr_list); |
| 507 | if (qr->cmd) |
| 508 | atomic_dec(&qr->cmd->immed_queue_count); |
| 509 | spin_unlock_bh(&conn->immed_queue_lock); |
| 510 | |
| 511 | return qr; |
| 512 | } |
| 513 | |
| 514 | static void iscsit_remove_cmd_from_immediate_queue( |
| 515 | struct iscsi_cmd *cmd, |
| 516 | struct iscsi_conn *conn) |
| 517 | { |
| 518 | struct iscsi_queue_req *qr, *qr_tmp; |
| 519 | |
| 520 | spin_lock_bh(&conn->immed_queue_lock); |
| 521 | if (!atomic_read(&cmd->immed_queue_count)) { |
| 522 | spin_unlock_bh(&conn->immed_queue_lock); |
| 523 | return; |
| 524 | } |
| 525 | |
| 526 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { |
| 527 | if (qr->cmd != cmd) |
| 528 | continue; |
| 529 | |
| 530 | atomic_dec(&qr->cmd->immed_queue_count); |
| 531 | list_del(&qr->qr_list); |
| 532 | kmem_cache_free(lio_qr_cache, qr); |
| 533 | } |
| 534 | spin_unlock_bh(&conn->immed_queue_lock); |
| 535 | |
| 536 | if (atomic_read(&cmd->immed_queue_count)) { |
| 537 | pr_err("ITT: 0x%08x immed_queue_count: %d\n", |
| 538 | cmd->init_task_tag, |
| 539 | atomic_read(&cmd->immed_queue_count)); |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | void iscsit_add_cmd_to_response_queue( |
| 544 | struct iscsi_cmd *cmd, |
| 545 | struct iscsi_conn *conn, |
| 546 | u8 state) |
| 547 | { |
| 548 | struct iscsi_queue_req *qr; |
| 549 | |
| 550 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); |
| 551 | if (!qr) { |
| 552 | pr_err("Unable to allocate memory for" |
| 553 | " struct iscsi_queue_req\n"); |
| 554 | return; |
| 555 | } |
| 556 | INIT_LIST_HEAD(&qr->qr_list); |
| 557 | qr->cmd = cmd; |
| 558 | qr->state = state; |
| 559 | |
| 560 | spin_lock_bh(&conn->response_queue_lock); |
| 561 | list_add_tail(&qr->qr_list, &conn->response_queue_list); |
| 562 | atomic_inc(&cmd->response_queue_count); |
| 563 | spin_unlock_bh(&conn->response_queue_lock); |
| 564 | |
Roland Dreier | d5627ac | 2012-10-31 09:16:46 -0700 | [diff] [blame] | 565 | wake_up(&conn->queues_wq); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) |
| 569 | { |
| 570 | struct iscsi_queue_req *qr; |
| 571 | |
| 572 | spin_lock_bh(&conn->response_queue_lock); |
| 573 | if (list_empty(&conn->response_queue_list)) { |
| 574 | spin_unlock_bh(&conn->response_queue_lock); |
| 575 | return NULL; |
| 576 | } |
| 577 | |
Roland Dreier | 1f981de | 2012-10-31 09:16:47 -0700 | [diff] [blame] | 578 | qr = list_first_entry(&conn->response_queue_list, |
| 579 | struct iscsi_queue_req, qr_list); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 580 | |
| 581 | list_del(&qr->qr_list); |
| 582 | if (qr->cmd) |
| 583 | atomic_dec(&qr->cmd->response_queue_count); |
| 584 | spin_unlock_bh(&conn->response_queue_lock); |
| 585 | |
| 586 | return qr; |
| 587 | } |
| 588 | |
| 589 | static void iscsit_remove_cmd_from_response_queue( |
| 590 | struct iscsi_cmd *cmd, |
| 591 | struct iscsi_conn *conn) |
| 592 | { |
| 593 | struct iscsi_queue_req *qr, *qr_tmp; |
| 594 | |
| 595 | spin_lock_bh(&conn->response_queue_lock); |
| 596 | if (!atomic_read(&cmd->response_queue_count)) { |
| 597 | spin_unlock_bh(&conn->response_queue_lock); |
| 598 | return; |
| 599 | } |
| 600 | |
| 601 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, |
| 602 | qr_list) { |
| 603 | if (qr->cmd != cmd) |
| 604 | continue; |
| 605 | |
| 606 | atomic_dec(&qr->cmd->response_queue_count); |
| 607 | list_del(&qr->qr_list); |
| 608 | kmem_cache_free(lio_qr_cache, qr); |
| 609 | } |
| 610 | spin_unlock_bh(&conn->response_queue_lock); |
| 611 | |
| 612 | if (atomic_read(&cmd->response_queue_count)) { |
| 613 | pr_err("ITT: 0x%08x response_queue_count: %d\n", |
| 614 | cmd->init_task_tag, |
| 615 | atomic_read(&cmd->response_queue_count)); |
| 616 | } |
| 617 | } |
| 618 | |
Roland Dreier | d5627ac | 2012-10-31 09:16:46 -0700 | [diff] [blame] | 619 | bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) |
| 620 | { |
| 621 | bool empty; |
| 622 | |
| 623 | spin_lock_bh(&conn->immed_queue_lock); |
| 624 | empty = list_empty(&conn->immed_queue_list); |
| 625 | spin_unlock_bh(&conn->immed_queue_lock); |
| 626 | |
| 627 | if (!empty) |
| 628 | return empty; |
| 629 | |
| 630 | spin_lock_bh(&conn->response_queue_lock); |
| 631 | empty = list_empty(&conn->response_queue_list); |
| 632 | spin_unlock_bh(&conn->response_queue_lock); |
| 633 | |
| 634 | return empty; |
| 635 | } |
| 636 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 637 | void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) |
| 638 | { |
| 639 | struct iscsi_queue_req *qr, *qr_tmp; |
| 640 | |
| 641 | spin_lock_bh(&conn->immed_queue_lock); |
| 642 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { |
| 643 | list_del(&qr->qr_list); |
| 644 | if (qr->cmd) |
| 645 | atomic_dec(&qr->cmd->immed_queue_count); |
| 646 | |
| 647 | kmem_cache_free(lio_qr_cache, qr); |
| 648 | } |
| 649 | spin_unlock_bh(&conn->immed_queue_lock); |
| 650 | |
| 651 | spin_lock_bh(&conn->response_queue_lock); |
| 652 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, |
| 653 | qr_list) { |
| 654 | list_del(&qr->qr_list); |
| 655 | if (qr->cmd) |
| 656 | atomic_dec(&qr->cmd->response_queue_count); |
| 657 | |
| 658 | kmem_cache_free(lio_qr_cache, qr); |
| 659 | } |
| 660 | spin_unlock_bh(&conn->response_queue_lock); |
| 661 | } |
| 662 | |
| 663 | void iscsit_release_cmd(struct iscsi_cmd *cmd) |
| 664 | { |
| 665 | struct iscsi_conn *conn = cmd->conn; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 666 | |
| 667 | iscsit_free_r2ts_from_list(cmd); |
| 668 | iscsit_free_all_datain_reqs(cmd); |
| 669 | |
| 670 | kfree(cmd->buf_ptr); |
| 671 | kfree(cmd->pdu_list); |
| 672 | kfree(cmd->seq_list); |
| 673 | kfree(cmd->tmr_req); |
| 674 | kfree(cmd->iov_data); |
| 675 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 676 | if (conn) { |
| 677 | iscsit_remove_cmd_from_immediate_queue(cmd, conn); |
| 678 | iscsit_remove_cmd_from_response_queue(cmd, conn); |
| 679 | } |
| 680 | |
| 681 | kmem_cache_free(lio_cmd_cache, cmd); |
| 682 | } |
| 683 | |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 684 | void iscsit_free_cmd(struct iscsi_cmd *cmd) |
| 685 | { |
| 686 | /* |
Masanari Iida | 2087969 | 2012-08-27 22:46:00 +0900 | [diff] [blame] | 687 | * Determine if a struct se_cmd is associated with |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 688 | * this struct iscsi_cmd. |
| 689 | */ |
| 690 | switch (cmd->iscsi_opcode) { |
| 691 | case ISCSI_OP_SCSI_CMD: |
| 692 | case ISCSI_OP_SCSI_TMFUNC: |
| 693 | transport_generic_free_cmd(&cmd->se_cmd, 1); |
| 694 | break; |
Nicholas Bellinger | c1ce4bd | 2012-01-16 16:04:15 -0800 | [diff] [blame] | 695 | case ISCSI_OP_REJECT: |
| 696 | /* |
| 697 | * Handle special case for REJECT when iscsi_add_reject*() has |
| 698 | * overwritten the original iscsi_opcode assignment, and the |
| 699 | * associated cmd->se_cmd needs to be released. |
| 700 | */ |
| 701 | if (cmd->se_cmd.se_tfo != NULL) { |
| 702 | transport_generic_free_cmd(&cmd->se_cmd, 1); |
| 703 | break; |
| 704 | } |
| 705 | /* Fall-through */ |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 706 | default: |
| 707 | iscsit_release_cmd(cmd); |
| 708 | break; |
| 709 | } |
| 710 | } |
| 711 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 712 | int iscsit_check_session_usage_count(struct iscsi_session *sess) |
| 713 | { |
| 714 | spin_lock_bh(&sess->session_usage_lock); |
| 715 | if (sess->session_usage_count != 0) { |
| 716 | sess->session_waiting_on_uc = 1; |
| 717 | spin_unlock_bh(&sess->session_usage_lock); |
| 718 | if (in_interrupt()) |
| 719 | return 2; |
| 720 | |
| 721 | wait_for_completion(&sess->session_waiting_on_uc_comp); |
| 722 | return 1; |
| 723 | } |
| 724 | spin_unlock_bh(&sess->session_usage_lock); |
| 725 | |
| 726 | return 0; |
| 727 | } |
| 728 | |
| 729 | void iscsit_dec_session_usage_count(struct iscsi_session *sess) |
| 730 | { |
| 731 | spin_lock_bh(&sess->session_usage_lock); |
| 732 | sess->session_usage_count--; |
| 733 | |
| 734 | if (!sess->session_usage_count && sess->session_waiting_on_uc) |
| 735 | complete(&sess->session_waiting_on_uc_comp); |
| 736 | |
| 737 | spin_unlock_bh(&sess->session_usage_lock); |
| 738 | } |
| 739 | |
| 740 | void iscsit_inc_session_usage_count(struct iscsi_session *sess) |
| 741 | { |
| 742 | spin_lock_bh(&sess->session_usage_lock); |
| 743 | sess->session_usage_count++; |
| 744 | spin_unlock_bh(&sess->session_usage_lock); |
| 745 | } |
| 746 | |
| 747 | /* |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 748 | * Setup conn->if_marker and conn->of_marker values based upon |
| 749 | * the initial marker-less interval. (see iSCSI v19 A.2) |
| 750 | */ |
| 751 | int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) |
| 752 | { |
| 753 | int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; |
| 754 | /* |
| 755 | * IFMarkInt and OFMarkInt are negotiated as 32-bit words. |
| 756 | */ |
| 757 | u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); |
| 758 | u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); |
| 759 | |
| 760 | if (conn->conn_ops->OFMarker) { |
| 761 | /* |
| 762 | * Account for the first Login Command received not |
| 763 | * via iscsi_recv_msg(). |
| 764 | */ |
| 765 | conn->of_marker += ISCSI_HDR_LEN; |
| 766 | if (conn->of_marker <= OFMarkInt) { |
| 767 | conn->of_marker = (OFMarkInt - conn->of_marker); |
| 768 | } else { |
| 769 | login_ofmarker_count = (conn->of_marker / OFMarkInt); |
| 770 | next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + |
| 771 | (login_ofmarker_count * MARKER_SIZE); |
| 772 | conn->of_marker = (next_marker - conn->of_marker); |
| 773 | } |
| 774 | conn->of_marker_offset = 0; |
| 775 | pr_debug("Setting OFMarker value to %u based on Initial" |
| 776 | " Markerless Interval.\n", conn->of_marker); |
| 777 | } |
| 778 | |
| 779 | if (conn->conn_ops->IFMarker) { |
| 780 | if (conn->if_marker <= IFMarkInt) { |
| 781 | conn->if_marker = (IFMarkInt - conn->if_marker); |
| 782 | } else { |
| 783 | login_ifmarker_count = (conn->if_marker / IFMarkInt); |
| 784 | next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + |
| 785 | (login_ifmarker_count * MARKER_SIZE); |
| 786 | conn->if_marker = (next_marker - conn->if_marker); |
| 787 | } |
| 788 | pr_debug("Setting IFMarker value to %u based on Initial" |
| 789 | " Markerless Interval.\n", conn->if_marker); |
| 790 | } |
| 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) |
| 796 | { |
| 797 | struct iscsi_conn *conn; |
| 798 | |
| 799 | spin_lock_bh(&sess->conn_lock); |
| 800 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { |
| 801 | if ((conn->cid == cid) && |
| 802 | (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { |
| 803 | iscsit_inc_conn_usage_count(conn); |
| 804 | spin_unlock_bh(&sess->conn_lock); |
| 805 | return conn; |
| 806 | } |
| 807 | } |
| 808 | spin_unlock_bh(&sess->conn_lock); |
| 809 | |
| 810 | return NULL; |
| 811 | } |
| 812 | |
| 813 | struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) |
| 814 | { |
| 815 | struct iscsi_conn *conn; |
| 816 | |
| 817 | spin_lock_bh(&sess->conn_lock); |
| 818 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { |
| 819 | if (conn->cid == cid) { |
| 820 | iscsit_inc_conn_usage_count(conn); |
| 821 | spin_lock(&conn->state_lock); |
| 822 | atomic_set(&conn->connection_wait_rcfr, 1); |
| 823 | spin_unlock(&conn->state_lock); |
| 824 | spin_unlock_bh(&sess->conn_lock); |
| 825 | return conn; |
| 826 | } |
| 827 | } |
| 828 | spin_unlock_bh(&sess->conn_lock); |
| 829 | |
| 830 | return NULL; |
| 831 | } |
| 832 | |
| 833 | void iscsit_check_conn_usage_count(struct iscsi_conn *conn) |
| 834 | { |
| 835 | spin_lock_bh(&conn->conn_usage_lock); |
| 836 | if (conn->conn_usage_count != 0) { |
| 837 | conn->conn_waiting_on_uc = 1; |
| 838 | spin_unlock_bh(&conn->conn_usage_lock); |
| 839 | |
| 840 | wait_for_completion(&conn->conn_waiting_on_uc_comp); |
| 841 | return; |
| 842 | } |
| 843 | spin_unlock_bh(&conn->conn_usage_lock); |
| 844 | } |
| 845 | |
| 846 | void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) |
| 847 | { |
| 848 | spin_lock_bh(&conn->conn_usage_lock); |
| 849 | conn->conn_usage_count--; |
| 850 | |
| 851 | if (!conn->conn_usage_count && conn->conn_waiting_on_uc) |
| 852 | complete(&conn->conn_waiting_on_uc_comp); |
| 853 | |
| 854 | spin_unlock_bh(&conn->conn_usage_lock); |
| 855 | } |
| 856 | |
| 857 | void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) |
| 858 | { |
| 859 | spin_lock_bh(&conn->conn_usage_lock); |
| 860 | conn->conn_usage_count++; |
| 861 | spin_unlock_bh(&conn->conn_usage_lock); |
| 862 | } |
| 863 | |
| 864 | static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) |
| 865 | { |
| 866 | u8 state; |
| 867 | struct iscsi_cmd *cmd; |
| 868 | |
| 869 | cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); |
| 870 | if (!cmd) |
| 871 | return -1; |
| 872 | |
| 873 | cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; |
| 874 | state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : |
| 875 | ISTATE_SEND_NOPIN_NO_RESPONSE; |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 876 | cmd->init_task_tag = RESERVED_ITT; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 877 | spin_lock_bh(&conn->sess->ttt_lock); |
| 878 | cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : |
| 879 | 0xFFFFFFFF; |
| 880 | if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) |
| 881 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; |
| 882 | spin_unlock_bh(&conn->sess->ttt_lock); |
| 883 | |
| 884 | spin_lock_bh(&conn->cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 885 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 886 | spin_unlock_bh(&conn->cmd_lock); |
| 887 | |
| 888 | if (want_response) |
| 889 | iscsit_start_nopin_response_timer(conn); |
| 890 | iscsit_add_cmd_to_immediate_queue(cmd, conn, state); |
| 891 | |
| 892 | return 0; |
| 893 | } |
| 894 | |
| 895 | static void iscsit_handle_nopin_response_timeout(unsigned long data) |
| 896 | { |
| 897 | struct iscsi_conn *conn = (struct iscsi_conn *) data; |
| 898 | |
| 899 | iscsit_inc_conn_usage_count(conn); |
| 900 | |
| 901 | spin_lock_bh(&conn->nopin_timer_lock); |
| 902 | if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { |
| 903 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 904 | iscsit_dec_conn_usage_count(conn); |
| 905 | return; |
| 906 | } |
| 907 | |
| 908 | pr_debug("Did not receive response to NOPIN on CID: %hu on" |
| 909 | " SID: %u, failing connection.\n", conn->cid, |
| 910 | conn->sess->sid); |
| 911 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; |
| 912 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 913 | |
| 914 | { |
| 915 | struct iscsi_portal_group *tpg = conn->sess->tpg; |
| 916 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; |
| 917 | |
| 918 | if (tiqn) { |
| 919 | spin_lock_bh(&tiqn->sess_err_stats.lock); |
| 920 | strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 921 | conn->sess->sess_ops->InitiatorName); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 922 | tiqn->sess_err_stats.last_sess_failure_type = |
| 923 | ISCSI_SESS_ERR_CXN_TIMEOUT; |
| 924 | tiqn->sess_err_stats.cxn_timeout_errors++; |
| 925 | conn->sess->conn_timeout_errors++; |
| 926 | spin_unlock_bh(&tiqn->sess_err_stats.lock); |
| 927 | } |
| 928 | } |
| 929 | |
| 930 | iscsit_cause_connection_reinstatement(conn, 0); |
| 931 | iscsit_dec_conn_usage_count(conn); |
| 932 | } |
| 933 | |
| 934 | void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) |
| 935 | { |
| 936 | struct iscsi_session *sess = conn->sess; |
| 937 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
| 938 | |
| 939 | spin_lock_bh(&conn->nopin_timer_lock); |
| 940 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { |
| 941 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 942 | return; |
| 943 | } |
| 944 | |
| 945 | mod_timer(&conn->nopin_response_timer, |
| 946 | (get_jiffies_64() + na->nopin_response_timeout * HZ)); |
| 947 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 948 | } |
| 949 | |
| 950 | /* |
| 951 | * Called with conn->nopin_timer_lock held. |
| 952 | */ |
| 953 | void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) |
| 954 | { |
| 955 | struct iscsi_session *sess = conn->sess; |
| 956 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
| 957 | |
| 958 | spin_lock_bh(&conn->nopin_timer_lock); |
| 959 | if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { |
| 960 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 961 | return; |
| 962 | } |
| 963 | |
| 964 | init_timer(&conn->nopin_response_timer); |
| 965 | conn->nopin_response_timer.expires = |
| 966 | (get_jiffies_64() + na->nopin_response_timeout * HZ); |
| 967 | conn->nopin_response_timer.data = (unsigned long)conn; |
| 968 | conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; |
| 969 | conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; |
| 970 | conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; |
| 971 | add_timer(&conn->nopin_response_timer); |
| 972 | |
| 973 | pr_debug("Started NOPIN Response Timer on CID: %d to %u" |
| 974 | " seconds\n", conn->cid, na->nopin_response_timeout); |
| 975 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 976 | } |
| 977 | |
| 978 | void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) |
| 979 | { |
| 980 | spin_lock_bh(&conn->nopin_timer_lock); |
| 981 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { |
| 982 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 983 | return; |
| 984 | } |
| 985 | conn->nopin_response_timer_flags |= ISCSI_TF_STOP; |
| 986 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 987 | |
| 988 | del_timer_sync(&conn->nopin_response_timer); |
| 989 | |
| 990 | spin_lock_bh(&conn->nopin_timer_lock); |
| 991 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; |
| 992 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 993 | } |
| 994 | |
| 995 | static void iscsit_handle_nopin_timeout(unsigned long data) |
| 996 | { |
| 997 | struct iscsi_conn *conn = (struct iscsi_conn *) data; |
| 998 | |
| 999 | iscsit_inc_conn_usage_count(conn); |
| 1000 | |
| 1001 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1002 | if (conn->nopin_timer_flags & ISCSI_TF_STOP) { |
| 1003 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1004 | iscsit_dec_conn_usage_count(conn); |
| 1005 | return; |
| 1006 | } |
| 1007 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; |
| 1008 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1009 | |
| 1010 | iscsit_add_nopin(conn, 1); |
| 1011 | iscsit_dec_conn_usage_count(conn); |
| 1012 | } |
| 1013 | |
| 1014 | /* |
| 1015 | * Called with conn->nopin_timer_lock held. |
| 1016 | */ |
| 1017 | void __iscsit_start_nopin_timer(struct iscsi_conn *conn) |
| 1018 | { |
| 1019 | struct iscsi_session *sess = conn->sess; |
| 1020 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
| 1021 | /* |
| 1022 | * NOPIN timeout is disabled. |
| 1023 | */ |
| 1024 | if (!na->nopin_timeout) |
| 1025 | return; |
| 1026 | |
| 1027 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) |
| 1028 | return; |
| 1029 | |
| 1030 | init_timer(&conn->nopin_timer); |
| 1031 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); |
| 1032 | conn->nopin_timer.data = (unsigned long)conn; |
| 1033 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; |
| 1034 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; |
| 1035 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; |
| 1036 | add_timer(&conn->nopin_timer); |
| 1037 | |
| 1038 | pr_debug("Started NOPIN Timer on CID: %d at %u second" |
| 1039 | " interval\n", conn->cid, na->nopin_timeout); |
| 1040 | } |
| 1041 | |
| 1042 | void iscsit_start_nopin_timer(struct iscsi_conn *conn) |
| 1043 | { |
| 1044 | struct iscsi_session *sess = conn->sess; |
| 1045 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
| 1046 | /* |
| 1047 | * NOPIN timeout is disabled.. |
| 1048 | */ |
| 1049 | if (!na->nopin_timeout) |
| 1050 | return; |
| 1051 | |
| 1052 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1053 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { |
| 1054 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1055 | return; |
| 1056 | } |
| 1057 | |
| 1058 | init_timer(&conn->nopin_timer); |
| 1059 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); |
| 1060 | conn->nopin_timer.data = (unsigned long)conn; |
| 1061 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; |
| 1062 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; |
| 1063 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; |
| 1064 | add_timer(&conn->nopin_timer); |
| 1065 | |
| 1066 | pr_debug("Started NOPIN Timer on CID: %d at %u second" |
| 1067 | " interval\n", conn->cid, na->nopin_timeout); |
| 1068 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1069 | } |
| 1070 | |
| 1071 | void iscsit_stop_nopin_timer(struct iscsi_conn *conn) |
| 1072 | { |
| 1073 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1074 | if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { |
| 1075 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1076 | return; |
| 1077 | } |
| 1078 | conn->nopin_timer_flags |= ISCSI_TF_STOP; |
| 1079 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1080 | |
| 1081 | del_timer_sync(&conn->nopin_timer); |
| 1082 | |
| 1083 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1084 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; |
| 1085 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1086 | } |
| 1087 | |
| 1088 | int iscsit_send_tx_data( |
| 1089 | struct iscsi_cmd *cmd, |
| 1090 | struct iscsi_conn *conn, |
| 1091 | int use_misc) |
| 1092 | { |
| 1093 | int tx_sent, tx_size; |
| 1094 | u32 iov_count; |
| 1095 | struct kvec *iov; |
| 1096 | |
| 1097 | send_data: |
| 1098 | tx_size = cmd->tx_size; |
| 1099 | |
| 1100 | if (!use_misc) { |
| 1101 | iov = &cmd->iov_data[0]; |
| 1102 | iov_count = cmd->iov_data_count; |
| 1103 | } else { |
| 1104 | iov = &cmd->iov_misc[0]; |
| 1105 | iov_count = cmd->iov_misc_count; |
| 1106 | } |
| 1107 | |
| 1108 | tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); |
| 1109 | if (tx_size != tx_sent) { |
| 1110 | if (tx_sent == -EAGAIN) { |
| 1111 | pr_err("tx_data() returned -EAGAIN\n"); |
| 1112 | goto send_data; |
| 1113 | } else |
| 1114 | return -1; |
| 1115 | } |
| 1116 | cmd->tx_size = 0; |
| 1117 | |
| 1118 | return 0; |
| 1119 | } |
| 1120 | |
| 1121 | int iscsit_fe_sendpage_sg( |
| 1122 | struct iscsi_cmd *cmd, |
| 1123 | struct iscsi_conn *conn) |
| 1124 | { |
| 1125 | struct scatterlist *sg = cmd->first_data_sg; |
| 1126 | struct kvec iov; |
| 1127 | u32 tx_hdr_size, data_len; |
| 1128 | u32 offset = cmd->first_data_sg_off; |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1129 | int tx_sent, iov_off; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1130 | |
| 1131 | send_hdr: |
| 1132 | tx_hdr_size = ISCSI_HDR_LEN; |
| 1133 | if (conn->conn_ops->HeaderDigest) |
| 1134 | tx_hdr_size += ISCSI_CRC_LEN; |
| 1135 | |
| 1136 | iov.iov_base = cmd->pdu; |
| 1137 | iov.iov_len = tx_hdr_size; |
| 1138 | |
| 1139 | tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); |
| 1140 | if (tx_hdr_size != tx_sent) { |
| 1141 | if (tx_sent == -EAGAIN) { |
| 1142 | pr_err("tx_data() returned -EAGAIN\n"); |
| 1143 | goto send_hdr; |
| 1144 | } |
| 1145 | return -1; |
| 1146 | } |
| 1147 | |
| 1148 | data_len = cmd->tx_size - tx_hdr_size - cmd->padding; |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1149 | /* |
| 1150 | * Set iov_off used by padding and data digest tx_data() calls below |
| 1151 | * in order to determine proper offset into cmd->iov_data[] |
| 1152 | */ |
| 1153 | if (conn->conn_ops->DataDigest) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1154 | data_len -= ISCSI_CRC_LEN; |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1155 | if (cmd->padding) |
| 1156 | iov_off = (cmd->iov_data_count - 2); |
| 1157 | else |
| 1158 | iov_off = (cmd->iov_data_count - 1); |
| 1159 | } else { |
| 1160 | iov_off = (cmd->iov_data_count - 1); |
| 1161 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1162 | /* |
| 1163 | * Perform sendpage() for each page in the scatterlist |
| 1164 | */ |
| 1165 | while (data_len) { |
| 1166 | u32 space = (sg->length - offset); |
| 1167 | u32 sub_len = min_t(u32, data_len, space); |
| 1168 | send_pg: |
| 1169 | tx_sent = conn->sock->ops->sendpage(conn->sock, |
| 1170 | sg_page(sg), sg->offset + offset, sub_len, 0); |
| 1171 | if (tx_sent != sub_len) { |
| 1172 | if (tx_sent == -EAGAIN) { |
| 1173 | pr_err("tcp_sendpage() returned" |
| 1174 | " -EAGAIN\n"); |
| 1175 | goto send_pg; |
| 1176 | } |
| 1177 | |
| 1178 | pr_err("tcp_sendpage() failure: %d\n", |
| 1179 | tx_sent); |
| 1180 | return -1; |
| 1181 | } |
| 1182 | |
| 1183 | data_len -= sub_len; |
| 1184 | offset = 0; |
| 1185 | sg = sg_next(sg); |
| 1186 | } |
| 1187 | |
| 1188 | send_padding: |
| 1189 | if (cmd->padding) { |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1190 | struct kvec *iov_p = &cmd->iov_data[iov_off++]; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1191 | |
| 1192 | tx_sent = tx_data(conn, iov_p, 1, cmd->padding); |
| 1193 | if (cmd->padding != tx_sent) { |
| 1194 | if (tx_sent == -EAGAIN) { |
| 1195 | pr_err("tx_data() returned -EAGAIN\n"); |
| 1196 | goto send_padding; |
| 1197 | } |
| 1198 | return -1; |
| 1199 | } |
| 1200 | } |
| 1201 | |
| 1202 | send_datacrc: |
| 1203 | if (conn->conn_ops->DataDigest) { |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1204 | struct kvec *iov_d = &cmd->iov_data[iov_off]; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1205 | |
| 1206 | tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); |
| 1207 | if (ISCSI_CRC_LEN != tx_sent) { |
| 1208 | if (tx_sent == -EAGAIN) { |
| 1209 | pr_err("tx_data() returned -EAGAIN\n"); |
| 1210 | goto send_datacrc; |
| 1211 | } |
| 1212 | return -1; |
| 1213 | } |
| 1214 | } |
| 1215 | |
| 1216 | return 0; |
| 1217 | } |
| 1218 | |
| 1219 | /* |
| 1220 | * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU |
| 1221 | * back to the Initiator when an expection condition occurs with the |
| 1222 | * errors set in status_class and status_detail. |
| 1223 | * |
| 1224 | * Parameters: iSCSI Connection, Status Class, Status Detail. |
| 1225 | * Returns: 0 on success, -1 on error. |
| 1226 | */ |
| 1227 | int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) |
| 1228 | { |
| 1229 | u8 iscsi_hdr[ISCSI_HDR_LEN]; |
| 1230 | int err; |
| 1231 | struct kvec iov; |
| 1232 | struct iscsi_login_rsp *hdr; |
| 1233 | |
| 1234 | iscsit_collect_login_stats(conn, status_class, status_detail); |
| 1235 | |
| 1236 | memset(&iov, 0, sizeof(struct kvec)); |
| 1237 | memset(&iscsi_hdr, 0x0, ISCSI_HDR_LEN); |
| 1238 | |
| 1239 | hdr = (struct iscsi_login_rsp *)&iscsi_hdr; |
| 1240 | hdr->opcode = ISCSI_OP_LOGIN_RSP; |
| 1241 | hdr->status_class = status_class; |
| 1242 | hdr->status_detail = status_detail; |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 1243 | hdr->itt = conn->login_itt; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1244 | |
| 1245 | iov.iov_base = &iscsi_hdr; |
| 1246 | iov.iov_len = ISCSI_HDR_LEN; |
| 1247 | |
| 1248 | PRINT_BUFF(iscsi_hdr, ISCSI_HDR_LEN); |
| 1249 | |
| 1250 | err = tx_data(conn, &iov, 1, ISCSI_HDR_LEN); |
| 1251 | if (err != ISCSI_HDR_LEN) { |
| 1252 | pr_err("tx_data returned less than expected\n"); |
| 1253 | return -1; |
| 1254 | } |
| 1255 | |
| 1256 | return 0; |
| 1257 | } |
| 1258 | |
| 1259 | void iscsit_print_session_params(struct iscsi_session *sess) |
| 1260 | { |
| 1261 | struct iscsi_conn *conn; |
| 1262 | |
| 1263 | pr_debug("-----------------------------[Session Params for" |
| 1264 | " SID: %u]-----------------------------\n", sess->sid); |
| 1265 | spin_lock_bh(&sess->conn_lock); |
| 1266 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) |
| 1267 | iscsi_dump_conn_ops(conn->conn_ops); |
| 1268 | spin_unlock_bh(&sess->conn_lock); |
| 1269 | |
| 1270 | iscsi_dump_sess_ops(sess->sess_ops); |
| 1271 | } |
| 1272 | |
| 1273 | static int iscsit_do_rx_data( |
| 1274 | struct iscsi_conn *conn, |
| 1275 | struct iscsi_data_count *count) |
| 1276 | { |
| 1277 | int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; |
Nicholas Bellinger | 2ff017f | 2011-09-16 01:44:54 -0700 | [diff] [blame] | 1278 | struct kvec *iov_p; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1279 | struct msghdr msg; |
| 1280 | |
| 1281 | if (!conn || !conn->sock || !conn->conn_ops) |
| 1282 | return -1; |
| 1283 | |
| 1284 | memset(&msg, 0, sizeof(struct msghdr)); |
| 1285 | |
Nicholas Bellinger | 2ff017f | 2011-09-16 01:44:54 -0700 | [diff] [blame] | 1286 | iov_p = count->iov; |
| 1287 | iov_len = count->iov_count; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1288 | |
| 1289 | while (total_rx < data) { |
| 1290 | rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, |
| 1291 | (data - total_rx), MSG_WAITALL); |
| 1292 | if (rx_loop <= 0) { |
| 1293 | pr_debug("rx_loop: %d total_rx: %d\n", |
| 1294 | rx_loop, total_rx); |
| 1295 | return rx_loop; |
| 1296 | } |
| 1297 | total_rx += rx_loop; |
| 1298 | pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", |
| 1299 | rx_loop, total_rx, data); |
| 1300 | } |
| 1301 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1302 | return total_rx; |
| 1303 | } |
| 1304 | |
| 1305 | static int iscsit_do_tx_data( |
| 1306 | struct iscsi_conn *conn, |
| 1307 | struct iscsi_data_count *count) |
| 1308 | { |
| 1309 | int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; |
Nicholas Bellinger | 2ff017f | 2011-09-16 01:44:54 -0700 | [diff] [blame] | 1310 | struct kvec *iov_p; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1311 | struct msghdr msg; |
| 1312 | |
| 1313 | if (!conn || !conn->sock || !conn->conn_ops) |
| 1314 | return -1; |
| 1315 | |
| 1316 | if (data <= 0) { |
| 1317 | pr_err("Data length is: %d\n", data); |
| 1318 | return -1; |
| 1319 | } |
| 1320 | |
| 1321 | memset(&msg, 0, sizeof(struct msghdr)); |
| 1322 | |
Nicholas Bellinger | 2ff017f | 2011-09-16 01:44:54 -0700 | [diff] [blame] | 1323 | iov_p = count->iov; |
| 1324 | iov_len = count->iov_count; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1325 | |
| 1326 | while (total_tx < data) { |
| 1327 | tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, |
| 1328 | (data - total_tx)); |
| 1329 | if (tx_loop <= 0) { |
| 1330 | pr_debug("tx_loop: %d total_tx %d\n", |
| 1331 | tx_loop, total_tx); |
| 1332 | return tx_loop; |
| 1333 | } |
| 1334 | total_tx += tx_loop; |
| 1335 | pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", |
| 1336 | tx_loop, total_tx, data); |
| 1337 | } |
| 1338 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1339 | return total_tx; |
| 1340 | } |
| 1341 | |
| 1342 | int rx_data( |
| 1343 | struct iscsi_conn *conn, |
| 1344 | struct kvec *iov, |
| 1345 | int iov_count, |
| 1346 | int data) |
| 1347 | { |
| 1348 | struct iscsi_data_count c; |
| 1349 | |
| 1350 | if (!conn || !conn->sock || !conn->conn_ops) |
| 1351 | return -1; |
| 1352 | |
| 1353 | memset(&c, 0, sizeof(struct iscsi_data_count)); |
| 1354 | c.iov = iov; |
| 1355 | c.iov_count = iov_count; |
| 1356 | c.data_length = data; |
| 1357 | c.type = ISCSI_RX_DATA; |
| 1358 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1359 | return iscsit_do_rx_data(conn, &c); |
| 1360 | } |
| 1361 | |
| 1362 | int tx_data( |
| 1363 | struct iscsi_conn *conn, |
| 1364 | struct kvec *iov, |
| 1365 | int iov_count, |
| 1366 | int data) |
| 1367 | { |
| 1368 | struct iscsi_data_count c; |
| 1369 | |
| 1370 | if (!conn || !conn->sock || !conn->conn_ops) |
| 1371 | return -1; |
| 1372 | |
| 1373 | memset(&c, 0, sizeof(struct iscsi_data_count)); |
| 1374 | c.iov = iov; |
| 1375 | c.iov_count = iov_count; |
| 1376 | c.data_length = data; |
| 1377 | c.type = ISCSI_TX_DATA; |
| 1378 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1379 | return iscsit_do_tx_data(conn, &c); |
| 1380 | } |
| 1381 | |
| 1382 | void iscsit_collect_login_stats( |
| 1383 | struct iscsi_conn *conn, |
| 1384 | u8 status_class, |
| 1385 | u8 status_detail) |
| 1386 | { |
| 1387 | struct iscsi_param *intrname = NULL; |
| 1388 | struct iscsi_tiqn *tiqn; |
| 1389 | struct iscsi_login_stats *ls; |
| 1390 | |
| 1391 | tiqn = iscsit_snmp_get_tiqn(conn); |
| 1392 | if (!tiqn) |
| 1393 | return; |
| 1394 | |
| 1395 | ls = &tiqn->login_stats; |
| 1396 | |
| 1397 | spin_lock(&ls->lock); |
| 1398 | if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && |
| 1399 | ((get_jiffies_64() - ls->last_fail_time) < 10)) { |
| 1400 | /* We already have the failure info for this login */ |
| 1401 | spin_unlock(&ls->lock); |
| 1402 | return; |
| 1403 | } |
| 1404 | |
| 1405 | if (status_class == ISCSI_STATUS_CLS_SUCCESS) |
| 1406 | ls->accepts++; |
| 1407 | else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { |
| 1408 | ls->redirects++; |
| 1409 | ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; |
| 1410 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && |
| 1411 | (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { |
| 1412 | ls->authenticate_fails++; |
| 1413 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; |
| 1414 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && |
| 1415 | (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { |
| 1416 | ls->authorize_fails++; |
| 1417 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; |
| 1418 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && |
| 1419 | (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { |
| 1420 | ls->negotiate_fails++; |
| 1421 | ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; |
| 1422 | } else { |
| 1423 | ls->other_fails++; |
| 1424 | ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; |
| 1425 | } |
| 1426 | |
| 1427 | /* Save initiator name, ip address and time, if it is a failed login */ |
| 1428 | if (status_class != ISCSI_STATUS_CLS_SUCCESS) { |
| 1429 | if (conn->param_list) |
| 1430 | intrname = iscsi_find_param_from_key(INITIATORNAME, |
| 1431 | conn->param_list); |
| 1432 | strcpy(ls->last_intr_fail_name, |
| 1433 | (intrname ? intrname->value : "Unknown")); |
| 1434 | |
| 1435 | ls->last_intr_fail_ip_family = conn->sock->sk->sk_family; |
| 1436 | snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, |
| 1437 | "%s", conn->login_ip); |
| 1438 | ls->last_fail_time = get_jiffies_64(); |
| 1439 | } |
| 1440 | |
| 1441 | spin_unlock(&ls->lock); |
| 1442 | } |
| 1443 | |
| 1444 | struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) |
| 1445 | { |
| 1446 | struct iscsi_portal_group *tpg; |
| 1447 | |
| 1448 | if (!conn || !conn->sess) |
| 1449 | return NULL; |
| 1450 | |
| 1451 | tpg = conn->sess->tpg; |
| 1452 | if (!tpg) |
| 1453 | return NULL; |
| 1454 | |
| 1455 | if (!tpg->tpg_tiqn) |
| 1456 | return NULL; |
| 1457 | |
| 1458 | return tpg->tpg_tiqn; |
| 1459 | } |