Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * This file contains the iSCSI Target specific utility functions. |
| 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/list.h> |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 20 | #include <linux/percpu_ida.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 21 | #include <scsi/scsi_tcq.h> |
| 22 | #include <scsi/iscsi_proto.h> |
| 23 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 24 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 25 | #include <target/target_core_configfs.h> |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 26 | #include <target/iscsi/iscsi_transport.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 27 | |
Sagi Grimberg | 67f091f | 2015-01-07 14:57:31 +0200 | [diff] [blame^] | 28 | #include <target/iscsi/iscsi_target_core.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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 | */ |
Nicholas Bellinger | 676687c | 2014-01-20 03:36:44 +0000 | [diff] [blame] | 155 | struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 156 | { |
| 157 | struct iscsi_cmd *cmd; |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 158 | struct se_session *se_sess = conn->sess->se_sess; |
Nicholas Bellinger | 676687c | 2014-01-20 03:36:44 +0000 | [diff] [blame] | 159 | int size, tag; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 160 | |
Kent Overstreet | 6f6b5d1 | 2014-01-19 08:26:37 +0000 | [diff] [blame] | 161 | tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state); |
| 162 | if (tag < 0) |
| 163 | return NULL; |
| 164 | |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 165 | size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; |
| 166 | cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); |
| 167 | memset(cmd, 0, size); |
| 168 | |
| 169 | cmd->se_cmd.map_tag = tag; |
Nicholas Bellinger | cdb7266 | 2013-03-06 22:09:17 -0800 | [diff] [blame] | 170 | cmd->conn = conn; |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 171 | INIT_LIST_HEAD(&cmd->i_conn_node); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 172 | INIT_LIST_HEAD(&cmd->datain_list); |
| 173 | INIT_LIST_HEAD(&cmd->cmd_r2t_list); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 174 | spin_lock_init(&cmd->datain_lock); |
| 175 | spin_lock_init(&cmd->dataout_timeout_lock); |
| 176 | spin_lock_init(&cmd->istate_lock); |
| 177 | spin_lock_init(&cmd->error_lock); |
| 178 | spin_lock_init(&cmd->r2t_lock); |
| 179 | |
| 180 | return cmd; |
| 181 | } |
Nicholas Bellinger | cdb7266 | 2013-03-06 22:09:17 -0800 | [diff] [blame] | 182 | EXPORT_SYMBOL(iscsit_allocate_cmd); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 183 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 184 | struct iscsi_seq *iscsit_get_seq_holder_for_datain( |
| 185 | struct iscsi_cmd *cmd, |
| 186 | u32 seq_send_order) |
| 187 | { |
| 188 | u32 i; |
| 189 | |
| 190 | for (i = 0; i < cmd->seq_count; i++) |
| 191 | if (cmd->seq_list[i].seq_send_order == seq_send_order) |
| 192 | return &cmd->seq_list[i]; |
| 193 | |
| 194 | return NULL; |
| 195 | } |
| 196 | |
| 197 | struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) |
| 198 | { |
| 199 | u32 i; |
| 200 | |
| 201 | if (!cmd->seq_list) { |
| 202 | pr_err("struct iscsi_cmd->seq_list is NULL!\n"); |
| 203 | return NULL; |
| 204 | } |
| 205 | |
| 206 | for (i = 0; i < cmd->seq_count; i++) { |
| 207 | if (cmd->seq_list[i].type != SEQTYPE_NORMAL) |
| 208 | continue; |
| 209 | if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { |
| 210 | cmd->seq_send_order++; |
| 211 | return &cmd->seq_list[i]; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | return NULL; |
| 216 | } |
| 217 | |
| 218 | struct iscsi_r2t *iscsit_get_holder_for_r2tsn( |
| 219 | struct iscsi_cmd *cmd, |
| 220 | u32 r2t_sn) |
| 221 | { |
| 222 | struct iscsi_r2t *r2t; |
| 223 | |
| 224 | spin_lock_bh(&cmd->r2t_lock); |
| 225 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { |
| 226 | if (r2t->r2t_sn == r2t_sn) { |
| 227 | spin_unlock_bh(&cmd->r2t_lock); |
| 228 | return r2t; |
| 229 | } |
| 230 | } |
| 231 | spin_unlock_bh(&cmd->r2t_lock); |
| 232 | |
| 233 | return NULL; |
| 234 | } |
| 235 | |
| 236 | static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) |
| 237 | { |
| 238 | int ret; |
| 239 | |
| 240 | /* |
| 241 | * This is the proper method of checking received CmdSN against |
| 242 | * ExpCmdSN and MaxCmdSN values, as well as accounting for out |
| 243 | * or order CmdSNs due to multiple connection sessions and/or |
| 244 | * CRC failures. |
| 245 | */ |
| 246 | if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { |
| 247 | pr_err("Received CmdSN: 0x%08x is greater than" |
Nicholas Bellinger | ea7e32b | 2013-11-18 10:55:10 -0800 | [diff] [blame] | 248 | " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 249 | sess->max_cmd_sn); |
Nicholas Bellinger | ea7e32b | 2013-11-18 10:55:10 -0800 | [diff] [blame] | 250 | ret = CMDSN_MAXCMDSN_OVERRUN; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 251 | |
| 252 | } else if (cmdsn == sess->exp_cmd_sn) { |
| 253 | sess->exp_cmd_sn++; |
| 254 | pr_debug("Received CmdSN matches ExpCmdSN," |
| 255 | " incremented ExpCmdSN to: 0x%08x\n", |
| 256 | sess->exp_cmd_sn); |
| 257 | ret = CMDSN_NORMAL_OPERATION; |
| 258 | |
| 259 | } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { |
| 260 | pr_debug("Received CmdSN: 0x%08x is greater" |
| 261 | " than ExpCmdSN: 0x%08x, not acknowledging.\n", |
| 262 | cmdsn, sess->exp_cmd_sn); |
| 263 | ret = CMDSN_HIGHER_THAN_EXP; |
| 264 | |
| 265 | } else { |
| 266 | pr_err("Received CmdSN: 0x%08x is less than" |
| 267 | " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, |
| 268 | sess->exp_cmd_sn); |
| 269 | ret = CMDSN_LOWER_THAN_EXP; |
| 270 | } |
| 271 | |
| 272 | return ret; |
| 273 | } |
| 274 | |
| 275 | /* |
| 276 | * Commands may be received out of order if MC/S is in use. |
| 277 | * Ensure they are executed in CmdSN order. |
| 278 | */ |
Nicholas Bellinger | 561bf15 | 2013-07-03 03:58:58 -0700 | [diff] [blame] | 279 | int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
| 280 | unsigned char *buf, __be32 cmdsn) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 281 | { |
Nicholas Bellinger | 561bf15 | 2013-07-03 03:58:58 -0700 | [diff] [blame] | 282 | int ret, cmdsn_ret; |
| 283 | bool reject = false; |
| 284 | u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 285 | |
| 286 | mutex_lock(&conn->sess->cmdsn_mutex); |
| 287 | |
Christoph Hellwig | 50e5c87 | 2012-09-26 08:00:40 -0400 | [diff] [blame] | 288 | cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 289 | switch (cmdsn_ret) { |
| 290 | case CMDSN_NORMAL_OPERATION: |
| 291 | ret = iscsit_execute_cmd(cmd, 0); |
| 292 | if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) |
| 293 | iscsit_execute_ooo_cmdsns(conn->sess); |
Nicholas Bellinger | 561bf15 | 2013-07-03 03:58:58 -0700 | [diff] [blame] | 294 | else if (ret < 0) { |
| 295 | reject = true; |
| 296 | ret = CMDSN_ERROR_CANNOT_RECOVER; |
| 297 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 298 | break; |
| 299 | case CMDSN_HIGHER_THAN_EXP: |
Christoph Hellwig | 50e5c87 | 2012-09-26 08:00:40 -0400 | [diff] [blame] | 300 | ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); |
Nicholas Bellinger | 561bf15 | 2013-07-03 03:58:58 -0700 | [diff] [blame] | 301 | if (ret < 0) { |
| 302 | reject = true; |
| 303 | ret = CMDSN_ERROR_CANNOT_RECOVER; |
| 304 | break; |
| 305 | } |
| 306 | ret = CMDSN_HIGHER_THAN_EXP; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 307 | break; |
| 308 | case CMDSN_LOWER_THAN_EXP: |
Nicholas Bellinger | ea7e32b | 2013-11-18 10:55:10 -0800 | [diff] [blame] | 309 | case CMDSN_MAXCMDSN_OVERRUN: |
| 310 | default: |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 311 | cmd->i_state = ISTATE_REMOVE; |
| 312 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); |
Nicholas Bellinger | ea7e32b | 2013-11-18 10:55:10 -0800 | [diff] [blame] | 313 | /* |
| 314 | * Existing callers for iscsit_sequence_cmd() will silently |
| 315 | * ignore commands with CMDSN_LOWER_THAN_EXP, so force this |
| 316 | * return for CMDSN_MAXCMDSN_OVERRUN as well.. |
| 317 | */ |
| 318 | ret = CMDSN_LOWER_THAN_EXP; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 319 | break; |
| 320 | } |
| 321 | mutex_unlock(&conn->sess->cmdsn_mutex); |
| 322 | |
Nicholas Bellinger | 561bf15 | 2013-07-03 03:58:58 -0700 | [diff] [blame] | 323 | if (reject) |
| 324 | iscsit_reject_cmd(cmd, reason, buf); |
| 325 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 326 | return ret; |
| 327 | } |
Nicholas Bellinger | 3e1c81a | 2013-03-06 22:18:24 -0800 | [diff] [blame] | 328 | EXPORT_SYMBOL(iscsit_sequence_cmd); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 329 | |
| 330 | int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) |
| 331 | { |
| 332 | struct iscsi_conn *conn = cmd->conn; |
| 333 | struct se_cmd *se_cmd = &cmd->se_cmd; |
| 334 | struct iscsi_data *hdr = (struct iscsi_data *) buf; |
| 335 | u32 payload_length = ntoh24(hdr->dlength); |
| 336 | |
| 337 | if (conn->sess->sess_ops->InitialR2T) { |
| 338 | pr_err("Received unexpected unsolicited data" |
| 339 | " while InitialR2T=Yes, protocol error.\n"); |
| 340 | transport_send_check_condition_and_sense(se_cmd, |
| 341 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); |
| 342 | return -1; |
| 343 | } |
| 344 | |
| 345 | if ((cmd->first_burst_len + payload_length) > |
| 346 | conn->sess->sess_ops->FirstBurstLength) { |
| 347 | pr_err("Total %u bytes exceeds FirstBurstLength: %u" |
| 348 | " for this Unsolicited DataOut Burst.\n", |
| 349 | (cmd->first_burst_len + payload_length), |
| 350 | conn->sess->sess_ops->FirstBurstLength); |
| 351 | transport_send_check_condition_and_sense(se_cmd, |
| 352 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); |
| 353 | return -1; |
| 354 | } |
| 355 | |
| 356 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) |
| 357 | return 0; |
| 358 | |
Andy Grover | ebf1d95 | 2012-04-03 15:51:24 -0700 | [diff] [blame] | 359 | if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 360 | ((cmd->first_burst_len + payload_length) != |
| 361 | conn->sess->sess_ops->FirstBurstLength)) { |
| 362 | pr_err("Unsolicited non-immediate data received %u" |
| 363 | " does not equal FirstBurstLength: %u, and does" |
| 364 | " not equal ExpXferLen %u.\n", |
| 365 | (cmd->first_burst_len + payload_length), |
Andy Grover | ebf1d95 | 2012-04-03 15:51:24 -0700 | [diff] [blame] | 366 | conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 367 | transport_send_check_condition_and_sense(se_cmd, |
| 368 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); |
| 369 | return -1; |
| 370 | } |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | struct iscsi_cmd *iscsit_find_cmd_from_itt( |
| 375 | struct iscsi_conn *conn, |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 376 | itt_t init_task_tag) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 377 | { |
| 378 | struct iscsi_cmd *cmd; |
| 379 | |
| 380 | spin_lock_bh(&conn->cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 381 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 382 | if (cmd->init_task_tag == init_task_tag) { |
| 383 | spin_unlock_bh(&conn->cmd_lock); |
| 384 | return cmd; |
| 385 | } |
| 386 | } |
| 387 | spin_unlock_bh(&conn->cmd_lock); |
| 388 | |
| 389 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu", |
| 390 | init_task_tag, conn->cid); |
| 391 | return NULL; |
| 392 | } |
| 393 | |
| 394 | struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( |
| 395 | struct iscsi_conn *conn, |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 396 | itt_t init_task_tag, |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 397 | u32 length) |
| 398 | { |
| 399 | struct iscsi_cmd *cmd; |
| 400 | |
| 401 | spin_lock_bh(&conn->cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 402 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
Nicholas Bellinger | 3687db8 | 2014-07-07 18:25:04 -0700 | [diff] [blame] | 403 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) |
| 404 | continue; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 405 | if (cmd->init_task_tag == init_task_tag) { |
| 406 | spin_unlock_bh(&conn->cmd_lock); |
| 407 | return cmd; |
| 408 | } |
| 409 | } |
| 410 | spin_unlock_bh(&conn->cmd_lock); |
| 411 | |
| 412 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu," |
| 413 | " dumping payload\n", init_task_tag, conn->cid); |
| 414 | if (length) |
| 415 | iscsit_dump_data_payload(conn, length, 1); |
| 416 | |
| 417 | return NULL; |
| 418 | } |
| 419 | |
| 420 | struct iscsi_cmd *iscsit_find_cmd_from_ttt( |
| 421 | struct iscsi_conn *conn, |
| 422 | u32 targ_xfer_tag) |
| 423 | { |
| 424 | struct iscsi_cmd *cmd = NULL; |
| 425 | |
| 426 | spin_lock_bh(&conn->cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 427 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 428 | if (cmd->targ_xfer_tag == targ_xfer_tag) { |
| 429 | spin_unlock_bh(&conn->cmd_lock); |
| 430 | return cmd; |
| 431 | } |
| 432 | } |
| 433 | spin_unlock_bh(&conn->cmd_lock); |
| 434 | |
| 435 | pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", |
| 436 | targ_xfer_tag, conn->cid); |
| 437 | return NULL; |
| 438 | } |
| 439 | |
| 440 | int iscsit_find_cmd_for_recovery( |
| 441 | struct iscsi_session *sess, |
| 442 | struct iscsi_cmd **cmd_ptr, |
| 443 | struct iscsi_conn_recovery **cr_ptr, |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 444 | itt_t init_task_tag) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 445 | { |
| 446 | struct iscsi_cmd *cmd = NULL; |
| 447 | struct iscsi_conn_recovery *cr; |
| 448 | /* |
| 449 | * Scan through the inactive connection recovery list's command list. |
| 450 | * If init_task_tag matches the command is still alligent. |
| 451 | */ |
| 452 | spin_lock(&sess->cr_i_lock); |
| 453 | list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { |
| 454 | spin_lock(&cr->conn_recovery_cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 455 | 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] | 456 | if (cmd->init_task_tag == init_task_tag) { |
| 457 | spin_unlock(&cr->conn_recovery_cmd_lock); |
| 458 | spin_unlock(&sess->cr_i_lock); |
| 459 | |
| 460 | *cr_ptr = cr; |
| 461 | *cmd_ptr = cmd; |
| 462 | return -2; |
| 463 | } |
| 464 | } |
| 465 | spin_unlock(&cr->conn_recovery_cmd_lock); |
| 466 | } |
| 467 | spin_unlock(&sess->cr_i_lock); |
| 468 | /* |
| 469 | * Scan through the active connection recovery list's command list. |
| 470 | * If init_task_tag matches the command is ready to be reassigned. |
| 471 | */ |
| 472 | spin_lock(&sess->cr_a_lock); |
| 473 | list_for_each_entry(cr, &sess->cr_active_list, cr_list) { |
| 474 | spin_lock(&cr->conn_recovery_cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 475 | 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] | 476 | if (cmd->init_task_tag == init_task_tag) { |
| 477 | spin_unlock(&cr->conn_recovery_cmd_lock); |
| 478 | spin_unlock(&sess->cr_a_lock); |
| 479 | |
| 480 | *cr_ptr = cr; |
| 481 | *cmd_ptr = cmd; |
| 482 | return 0; |
| 483 | } |
| 484 | } |
| 485 | spin_unlock(&cr->conn_recovery_cmd_lock); |
| 486 | } |
| 487 | spin_unlock(&sess->cr_a_lock); |
| 488 | |
| 489 | return -1; |
| 490 | } |
| 491 | |
| 492 | void iscsit_add_cmd_to_immediate_queue( |
| 493 | struct iscsi_cmd *cmd, |
| 494 | struct iscsi_conn *conn, |
| 495 | u8 state) |
| 496 | { |
| 497 | struct iscsi_queue_req *qr; |
| 498 | |
| 499 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); |
| 500 | if (!qr) { |
| 501 | pr_err("Unable to allocate memory for" |
| 502 | " struct iscsi_queue_req\n"); |
| 503 | return; |
| 504 | } |
| 505 | INIT_LIST_HEAD(&qr->qr_list); |
| 506 | qr->cmd = cmd; |
| 507 | qr->state = state; |
| 508 | |
| 509 | spin_lock_bh(&conn->immed_queue_lock); |
| 510 | list_add_tail(&qr->qr_list, &conn->immed_queue_list); |
| 511 | atomic_inc(&cmd->immed_queue_count); |
| 512 | atomic_set(&conn->check_immediate_queue, 1); |
| 513 | spin_unlock_bh(&conn->immed_queue_lock); |
| 514 | |
Roland Dreier | d5627ac | 2012-10-31 09:16:46 -0700 | [diff] [blame] | 515 | wake_up(&conn->queues_wq); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 516 | } |
| 517 | |
| 518 | struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) |
| 519 | { |
| 520 | struct iscsi_queue_req *qr; |
| 521 | |
| 522 | spin_lock_bh(&conn->immed_queue_lock); |
| 523 | if (list_empty(&conn->immed_queue_list)) { |
| 524 | spin_unlock_bh(&conn->immed_queue_lock); |
| 525 | return NULL; |
| 526 | } |
Roland Dreier | 1f981de | 2012-10-31 09:16:47 -0700 | [diff] [blame] | 527 | qr = list_first_entry(&conn->immed_queue_list, |
| 528 | struct iscsi_queue_req, qr_list); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 529 | |
| 530 | list_del(&qr->qr_list); |
| 531 | if (qr->cmd) |
| 532 | atomic_dec(&qr->cmd->immed_queue_count); |
| 533 | spin_unlock_bh(&conn->immed_queue_lock); |
| 534 | |
| 535 | return qr; |
| 536 | } |
| 537 | |
| 538 | static void iscsit_remove_cmd_from_immediate_queue( |
| 539 | struct iscsi_cmd *cmd, |
| 540 | struct iscsi_conn *conn) |
| 541 | { |
| 542 | struct iscsi_queue_req *qr, *qr_tmp; |
| 543 | |
| 544 | spin_lock_bh(&conn->immed_queue_lock); |
| 545 | if (!atomic_read(&cmd->immed_queue_count)) { |
| 546 | spin_unlock_bh(&conn->immed_queue_lock); |
| 547 | return; |
| 548 | } |
| 549 | |
| 550 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { |
| 551 | if (qr->cmd != cmd) |
| 552 | continue; |
| 553 | |
| 554 | atomic_dec(&qr->cmd->immed_queue_count); |
| 555 | list_del(&qr->qr_list); |
| 556 | kmem_cache_free(lio_qr_cache, qr); |
| 557 | } |
| 558 | spin_unlock_bh(&conn->immed_queue_lock); |
| 559 | |
| 560 | if (atomic_read(&cmd->immed_queue_count)) { |
| 561 | pr_err("ITT: 0x%08x immed_queue_count: %d\n", |
| 562 | cmd->init_task_tag, |
| 563 | atomic_read(&cmd->immed_queue_count)); |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | void iscsit_add_cmd_to_response_queue( |
| 568 | struct iscsi_cmd *cmd, |
| 569 | struct iscsi_conn *conn, |
| 570 | u8 state) |
| 571 | { |
| 572 | struct iscsi_queue_req *qr; |
| 573 | |
| 574 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); |
| 575 | if (!qr) { |
| 576 | pr_err("Unable to allocate memory for" |
| 577 | " struct iscsi_queue_req\n"); |
| 578 | return; |
| 579 | } |
| 580 | INIT_LIST_HEAD(&qr->qr_list); |
| 581 | qr->cmd = cmd; |
| 582 | qr->state = state; |
| 583 | |
| 584 | spin_lock_bh(&conn->response_queue_lock); |
| 585 | list_add_tail(&qr->qr_list, &conn->response_queue_list); |
| 586 | atomic_inc(&cmd->response_queue_count); |
| 587 | spin_unlock_bh(&conn->response_queue_lock); |
| 588 | |
Roland Dreier | d5627ac | 2012-10-31 09:16:46 -0700 | [diff] [blame] | 589 | wake_up(&conn->queues_wq); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) |
| 593 | { |
| 594 | struct iscsi_queue_req *qr; |
| 595 | |
| 596 | spin_lock_bh(&conn->response_queue_lock); |
| 597 | if (list_empty(&conn->response_queue_list)) { |
| 598 | spin_unlock_bh(&conn->response_queue_lock); |
| 599 | return NULL; |
| 600 | } |
| 601 | |
Roland Dreier | 1f981de | 2012-10-31 09:16:47 -0700 | [diff] [blame] | 602 | qr = list_first_entry(&conn->response_queue_list, |
| 603 | struct iscsi_queue_req, qr_list); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 604 | |
| 605 | list_del(&qr->qr_list); |
| 606 | if (qr->cmd) |
| 607 | atomic_dec(&qr->cmd->response_queue_count); |
| 608 | spin_unlock_bh(&conn->response_queue_lock); |
| 609 | |
| 610 | return qr; |
| 611 | } |
| 612 | |
| 613 | static void iscsit_remove_cmd_from_response_queue( |
| 614 | struct iscsi_cmd *cmd, |
| 615 | struct iscsi_conn *conn) |
| 616 | { |
| 617 | struct iscsi_queue_req *qr, *qr_tmp; |
| 618 | |
| 619 | spin_lock_bh(&conn->response_queue_lock); |
| 620 | if (!atomic_read(&cmd->response_queue_count)) { |
| 621 | spin_unlock_bh(&conn->response_queue_lock); |
| 622 | return; |
| 623 | } |
| 624 | |
| 625 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, |
| 626 | qr_list) { |
| 627 | if (qr->cmd != cmd) |
| 628 | continue; |
| 629 | |
| 630 | atomic_dec(&qr->cmd->response_queue_count); |
| 631 | list_del(&qr->qr_list); |
| 632 | kmem_cache_free(lio_qr_cache, qr); |
| 633 | } |
| 634 | spin_unlock_bh(&conn->response_queue_lock); |
| 635 | |
| 636 | if (atomic_read(&cmd->response_queue_count)) { |
| 637 | pr_err("ITT: 0x%08x response_queue_count: %d\n", |
| 638 | cmd->init_task_tag, |
| 639 | atomic_read(&cmd->response_queue_count)); |
| 640 | } |
| 641 | } |
| 642 | |
Roland Dreier | d5627ac | 2012-10-31 09:16:46 -0700 | [diff] [blame] | 643 | bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) |
| 644 | { |
| 645 | bool empty; |
| 646 | |
| 647 | spin_lock_bh(&conn->immed_queue_lock); |
| 648 | empty = list_empty(&conn->immed_queue_list); |
| 649 | spin_unlock_bh(&conn->immed_queue_lock); |
| 650 | |
| 651 | if (!empty) |
| 652 | return empty; |
| 653 | |
| 654 | spin_lock_bh(&conn->response_queue_lock); |
| 655 | empty = list_empty(&conn->response_queue_list); |
| 656 | spin_unlock_bh(&conn->response_queue_lock); |
| 657 | |
| 658 | return empty; |
| 659 | } |
| 660 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 661 | void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) |
| 662 | { |
| 663 | struct iscsi_queue_req *qr, *qr_tmp; |
| 664 | |
| 665 | spin_lock_bh(&conn->immed_queue_lock); |
| 666 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { |
| 667 | list_del(&qr->qr_list); |
| 668 | if (qr->cmd) |
| 669 | atomic_dec(&qr->cmd->immed_queue_count); |
| 670 | |
| 671 | kmem_cache_free(lio_qr_cache, qr); |
| 672 | } |
| 673 | spin_unlock_bh(&conn->immed_queue_lock); |
| 674 | |
| 675 | spin_lock_bh(&conn->response_queue_lock); |
| 676 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, |
| 677 | qr_list) { |
| 678 | list_del(&qr->qr_list); |
| 679 | if (qr->cmd) |
| 680 | atomic_dec(&qr->cmd->response_queue_count); |
| 681 | |
| 682 | kmem_cache_free(lio_qr_cache, qr); |
| 683 | } |
| 684 | spin_unlock_bh(&conn->response_queue_lock); |
| 685 | } |
| 686 | |
| 687 | void iscsit_release_cmd(struct iscsi_cmd *cmd) |
| 688 | { |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 689 | struct iscsi_session *sess; |
| 690 | struct se_cmd *se_cmd = &cmd->se_cmd; |
| 691 | |
| 692 | if (cmd->conn) |
| 693 | sess = cmd->conn->sess; |
| 694 | else |
| 695 | sess = cmd->sess; |
| 696 | |
| 697 | BUG_ON(!sess || !sess->se_sess); |
| 698 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 699 | kfree(cmd->buf_ptr); |
| 700 | kfree(cmd->pdu_list); |
| 701 | kfree(cmd->seq_list); |
| 702 | kfree(cmd->tmr_req); |
| 703 | kfree(cmd->iov_data); |
Nicholas Bellinger | 9864ca9 | 2013-06-19 22:43:11 -0700 | [diff] [blame] | 704 | kfree(cmd->text_in_ptr); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 705 | |
Nicholas Bellinger | 988e3a8 | 2013-08-17 15:49:08 -0700 | [diff] [blame] | 706 | percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 707 | } |
Nicholas Bellinger | d703ce2 | 2013-08-17 14:27:56 -0700 | [diff] [blame] | 708 | EXPORT_SYMBOL(iscsit_release_cmd); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 709 | |
Nicholas Bellinger | 131e6ab | 2014-03-22 14:55:56 -0700 | [diff] [blame] | 710 | void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, |
| 711 | bool check_queues) |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 712 | { |
Nicholas Bellinger | aafc9d1 | 2013-05-31 00:49:41 -0700 | [diff] [blame] | 713 | struct iscsi_conn *conn = cmd->conn; |
| 714 | |
| 715 | if (scsi_cmd) { |
| 716 | if (cmd->data_direction == DMA_TO_DEVICE) { |
| 717 | iscsit_stop_dataout_timer(cmd); |
| 718 | iscsit_free_r2ts_from_list(cmd); |
| 719 | } |
| 720 | if (cmd->data_direction == DMA_FROM_DEVICE) |
| 721 | iscsit_free_all_datain_reqs(cmd); |
| 722 | } |
| 723 | |
| 724 | if (conn && check_queues) { |
| 725 | iscsit_remove_cmd_from_immediate_queue(cmd, conn); |
| 726 | iscsit_remove_cmd_from_response_queue(cmd, conn); |
| 727 | } |
| 728 | } |
| 729 | |
| 730 | void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) |
| 731 | { |
| 732 | struct se_cmd *se_cmd = NULL; |
| 733 | int rc; |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 734 | /* |
Masanari Iida | 2087969 | 2012-08-27 22:46:00 +0900 | [diff] [blame] | 735 | * Determine if a struct se_cmd is associated with |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 736 | * this struct iscsi_cmd. |
| 737 | */ |
| 738 | switch (cmd->iscsi_opcode) { |
| 739 | case ISCSI_OP_SCSI_CMD: |
Nicholas Bellinger | aafc9d1 | 2013-05-31 00:49:41 -0700 | [diff] [blame] | 740 | se_cmd = &cmd->se_cmd; |
| 741 | __iscsit_free_cmd(cmd, true, shutdown); |
Nicholas Bellinger | cdb7266 | 2013-03-06 22:09:17 -0800 | [diff] [blame] | 742 | /* |
| 743 | * Fallthrough |
| 744 | */ |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 745 | case ISCSI_OP_SCSI_TMFUNC: |
Nicholas Bellinger | e255a28 | 2013-10-03 13:37:21 -0700 | [diff] [blame] | 746 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
Nicholas Bellinger | aafc9d1 | 2013-05-31 00:49:41 -0700 | [diff] [blame] | 747 | if (!rc && shutdown && se_cmd && se_cmd->se_sess) { |
| 748 | __iscsit_free_cmd(cmd, true, shutdown); |
| 749 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); |
| 750 | } |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 751 | break; |
Nicholas Bellinger | c1ce4bd | 2012-01-16 16:04:15 -0800 | [diff] [blame] | 752 | case ISCSI_OP_REJECT: |
| 753 | /* |
| 754 | * Handle special case for REJECT when iscsi_add_reject*() has |
| 755 | * overwritten the original iscsi_opcode assignment, and the |
| 756 | * associated cmd->se_cmd needs to be released. |
| 757 | */ |
| 758 | if (cmd->se_cmd.se_tfo != NULL) { |
Nicholas Bellinger | aafc9d1 | 2013-05-31 00:49:41 -0700 | [diff] [blame] | 759 | se_cmd = &cmd->se_cmd; |
| 760 | __iscsit_free_cmd(cmd, true, shutdown); |
| 761 | |
Nicholas Bellinger | e255a28 | 2013-10-03 13:37:21 -0700 | [diff] [blame] | 762 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
Nicholas Bellinger | aafc9d1 | 2013-05-31 00:49:41 -0700 | [diff] [blame] | 763 | if (!rc && shutdown && se_cmd->se_sess) { |
| 764 | __iscsit_free_cmd(cmd, true, shutdown); |
| 765 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); |
| 766 | } |
Nicholas Bellinger | c1ce4bd | 2012-01-16 16:04:15 -0800 | [diff] [blame] | 767 | break; |
| 768 | } |
| 769 | /* Fall-through */ |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 770 | default: |
Nicholas Bellinger | aafc9d1 | 2013-05-31 00:49:41 -0700 | [diff] [blame] | 771 | __iscsit_free_cmd(cmd, false, shutdown); |
Nicholas Bellinger | d703ce2 | 2013-08-17 14:27:56 -0700 | [diff] [blame] | 772 | iscsit_release_cmd(cmd); |
Nicholas Bellinger | d270190 | 2011-10-09 01:48:14 -0700 | [diff] [blame] | 773 | break; |
| 774 | } |
| 775 | } |
| 776 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 777 | int iscsit_check_session_usage_count(struct iscsi_session *sess) |
| 778 | { |
| 779 | spin_lock_bh(&sess->session_usage_lock); |
| 780 | if (sess->session_usage_count != 0) { |
| 781 | sess->session_waiting_on_uc = 1; |
| 782 | spin_unlock_bh(&sess->session_usage_lock); |
| 783 | if (in_interrupt()) |
| 784 | return 2; |
| 785 | |
| 786 | wait_for_completion(&sess->session_waiting_on_uc_comp); |
| 787 | return 1; |
| 788 | } |
| 789 | spin_unlock_bh(&sess->session_usage_lock); |
| 790 | |
| 791 | return 0; |
| 792 | } |
| 793 | |
| 794 | void iscsit_dec_session_usage_count(struct iscsi_session *sess) |
| 795 | { |
| 796 | spin_lock_bh(&sess->session_usage_lock); |
| 797 | sess->session_usage_count--; |
| 798 | |
| 799 | if (!sess->session_usage_count && sess->session_waiting_on_uc) |
| 800 | complete(&sess->session_waiting_on_uc_comp); |
| 801 | |
| 802 | spin_unlock_bh(&sess->session_usage_lock); |
| 803 | } |
| 804 | |
| 805 | void iscsit_inc_session_usage_count(struct iscsi_session *sess) |
| 806 | { |
| 807 | spin_lock_bh(&sess->session_usage_lock); |
| 808 | sess->session_usage_count++; |
| 809 | spin_unlock_bh(&sess->session_usage_lock); |
| 810 | } |
| 811 | |
| 812 | /* |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 813 | * Setup conn->if_marker and conn->of_marker values based upon |
| 814 | * the initial marker-less interval. (see iSCSI v19 A.2) |
| 815 | */ |
| 816 | int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) |
| 817 | { |
| 818 | int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; |
| 819 | /* |
| 820 | * IFMarkInt and OFMarkInt are negotiated as 32-bit words. |
| 821 | */ |
| 822 | u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); |
| 823 | u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); |
| 824 | |
| 825 | if (conn->conn_ops->OFMarker) { |
| 826 | /* |
| 827 | * Account for the first Login Command received not |
| 828 | * via iscsi_recv_msg(). |
| 829 | */ |
| 830 | conn->of_marker += ISCSI_HDR_LEN; |
| 831 | if (conn->of_marker <= OFMarkInt) { |
| 832 | conn->of_marker = (OFMarkInt - conn->of_marker); |
| 833 | } else { |
| 834 | login_ofmarker_count = (conn->of_marker / OFMarkInt); |
| 835 | next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + |
| 836 | (login_ofmarker_count * MARKER_SIZE); |
| 837 | conn->of_marker = (next_marker - conn->of_marker); |
| 838 | } |
| 839 | conn->of_marker_offset = 0; |
| 840 | pr_debug("Setting OFMarker value to %u based on Initial" |
| 841 | " Markerless Interval.\n", conn->of_marker); |
| 842 | } |
| 843 | |
| 844 | if (conn->conn_ops->IFMarker) { |
| 845 | if (conn->if_marker <= IFMarkInt) { |
| 846 | conn->if_marker = (IFMarkInt - conn->if_marker); |
| 847 | } else { |
| 848 | login_ifmarker_count = (conn->if_marker / IFMarkInt); |
| 849 | next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + |
| 850 | (login_ifmarker_count * MARKER_SIZE); |
| 851 | conn->if_marker = (next_marker - conn->if_marker); |
| 852 | } |
| 853 | pr_debug("Setting IFMarker value to %u based on Initial" |
| 854 | " Markerless Interval.\n", conn->if_marker); |
| 855 | } |
| 856 | |
| 857 | return 0; |
| 858 | } |
| 859 | |
| 860 | struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) |
| 861 | { |
| 862 | struct iscsi_conn *conn; |
| 863 | |
| 864 | spin_lock_bh(&sess->conn_lock); |
| 865 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { |
| 866 | if ((conn->cid == cid) && |
| 867 | (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { |
| 868 | iscsit_inc_conn_usage_count(conn); |
| 869 | spin_unlock_bh(&sess->conn_lock); |
| 870 | return conn; |
| 871 | } |
| 872 | } |
| 873 | spin_unlock_bh(&sess->conn_lock); |
| 874 | |
| 875 | return NULL; |
| 876 | } |
| 877 | |
| 878 | struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) |
| 879 | { |
| 880 | struct iscsi_conn *conn; |
| 881 | |
| 882 | spin_lock_bh(&sess->conn_lock); |
| 883 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { |
| 884 | if (conn->cid == cid) { |
| 885 | iscsit_inc_conn_usage_count(conn); |
| 886 | spin_lock(&conn->state_lock); |
| 887 | atomic_set(&conn->connection_wait_rcfr, 1); |
| 888 | spin_unlock(&conn->state_lock); |
| 889 | spin_unlock_bh(&sess->conn_lock); |
| 890 | return conn; |
| 891 | } |
| 892 | } |
| 893 | spin_unlock_bh(&sess->conn_lock); |
| 894 | |
| 895 | return NULL; |
| 896 | } |
| 897 | |
| 898 | void iscsit_check_conn_usage_count(struct iscsi_conn *conn) |
| 899 | { |
| 900 | spin_lock_bh(&conn->conn_usage_lock); |
| 901 | if (conn->conn_usage_count != 0) { |
| 902 | conn->conn_waiting_on_uc = 1; |
| 903 | spin_unlock_bh(&conn->conn_usage_lock); |
| 904 | |
| 905 | wait_for_completion(&conn->conn_waiting_on_uc_comp); |
| 906 | return; |
| 907 | } |
| 908 | spin_unlock_bh(&conn->conn_usage_lock); |
| 909 | } |
| 910 | |
| 911 | void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) |
| 912 | { |
| 913 | spin_lock_bh(&conn->conn_usage_lock); |
| 914 | conn->conn_usage_count--; |
| 915 | |
| 916 | if (!conn->conn_usage_count && conn->conn_waiting_on_uc) |
| 917 | complete(&conn->conn_waiting_on_uc_comp); |
| 918 | |
| 919 | spin_unlock_bh(&conn->conn_usage_lock); |
| 920 | } |
| 921 | |
| 922 | void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) |
| 923 | { |
| 924 | spin_lock_bh(&conn->conn_usage_lock); |
| 925 | conn->conn_usage_count++; |
| 926 | spin_unlock_bh(&conn->conn_usage_lock); |
| 927 | } |
| 928 | |
| 929 | static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) |
| 930 | { |
| 931 | u8 state; |
| 932 | struct iscsi_cmd *cmd; |
| 933 | |
Nicholas Bellinger | 676687c | 2014-01-20 03:36:44 +0000 | [diff] [blame] | 934 | cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 935 | if (!cmd) |
| 936 | return -1; |
| 937 | |
| 938 | cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; |
| 939 | state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : |
| 940 | ISTATE_SEND_NOPIN_NO_RESPONSE; |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 941 | cmd->init_task_tag = RESERVED_ITT; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 942 | spin_lock_bh(&conn->sess->ttt_lock); |
| 943 | cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : |
| 944 | 0xFFFFFFFF; |
| 945 | if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) |
| 946 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; |
| 947 | spin_unlock_bh(&conn->sess->ttt_lock); |
| 948 | |
| 949 | spin_lock_bh(&conn->cmd_lock); |
Andy Grover | 2fbb471 | 2012-04-03 15:51:01 -0700 | [diff] [blame] | 950 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 951 | spin_unlock_bh(&conn->cmd_lock); |
| 952 | |
| 953 | if (want_response) |
| 954 | iscsit_start_nopin_response_timer(conn); |
| 955 | iscsit_add_cmd_to_immediate_queue(cmd, conn, state); |
| 956 | |
| 957 | return 0; |
| 958 | } |
| 959 | |
| 960 | static void iscsit_handle_nopin_response_timeout(unsigned long data) |
| 961 | { |
| 962 | struct iscsi_conn *conn = (struct iscsi_conn *) data; |
| 963 | |
| 964 | iscsit_inc_conn_usage_count(conn); |
| 965 | |
| 966 | spin_lock_bh(&conn->nopin_timer_lock); |
| 967 | if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { |
| 968 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 969 | iscsit_dec_conn_usage_count(conn); |
| 970 | return; |
| 971 | } |
| 972 | |
| 973 | pr_debug("Did not receive response to NOPIN on CID: %hu on" |
| 974 | " SID: %u, failing connection.\n", conn->cid, |
| 975 | conn->sess->sid); |
| 976 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; |
| 977 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 978 | |
| 979 | { |
| 980 | struct iscsi_portal_group *tpg = conn->sess->tpg; |
| 981 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; |
| 982 | |
| 983 | if (tiqn) { |
| 984 | spin_lock_bh(&tiqn->sess_err_stats.lock); |
| 985 | strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 986 | conn->sess->sess_ops->InitiatorName); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 987 | tiqn->sess_err_stats.last_sess_failure_type = |
| 988 | ISCSI_SESS_ERR_CXN_TIMEOUT; |
| 989 | tiqn->sess_err_stats.cxn_timeout_errors++; |
Nicholas Bellinger | 04f3b31 | 2013-11-13 18:54:45 -0800 | [diff] [blame] | 990 | atomic_long_inc(&conn->sess->conn_timeout_errors); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 991 | spin_unlock_bh(&tiqn->sess_err_stats.lock); |
| 992 | } |
| 993 | } |
| 994 | |
| 995 | iscsit_cause_connection_reinstatement(conn, 0); |
| 996 | iscsit_dec_conn_usage_count(conn); |
| 997 | } |
| 998 | |
| 999 | void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) |
| 1000 | { |
| 1001 | struct iscsi_session *sess = conn->sess; |
| 1002 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
| 1003 | |
| 1004 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1005 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { |
| 1006 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1007 | return; |
| 1008 | } |
| 1009 | |
| 1010 | mod_timer(&conn->nopin_response_timer, |
| 1011 | (get_jiffies_64() + na->nopin_response_timeout * HZ)); |
| 1012 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1013 | } |
| 1014 | |
| 1015 | /* |
| 1016 | * Called with conn->nopin_timer_lock held. |
| 1017 | */ |
| 1018 | void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) |
| 1019 | { |
| 1020 | struct iscsi_session *sess = conn->sess; |
| 1021 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
| 1022 | |
| 1023 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1024 | if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { |
| 1025 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1026 | return; |
| 1027 | } |
| 1028 | |
| 1029 | init_timer(&conn->nopin_response_timer); |
| 1030 | conn->nopin_response_timer.expires = |
| 1031 | (get_jiffies_64() + na->nopin_response_timeout * HZ); |
| 1032 | conn->nopin_response_timer.data = (unsigned long)conn; |
| 1033 | conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; |
| 1034 | conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; |
| 1035 | conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; |
| 1036 | add_timer(&conn->nopin_response_timer); |
| 1037 | |
| 1038 | pr_debug("Started NOPIN Response Timer on CID: %d to %u" |
| 1039 | " seconds\n", conn->cid, na->nopin_response_timeout); |
| 1040 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1041 | } |
| 1042 | |
| 1043 | void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) |
| 1044 | { |
| 1045 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1046 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { |
| 1047 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1048 | return; |
| 1049 | } |
| 1050 | conn->nopin_response_timer_flags |= ISCSI_TF_STOP; |
| 1051 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1052 | |
| 1053 | del_timer_sync(&conn->nopin_response_timer); |
| 1054 | |
| 1055 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1056 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; |
| 1057 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1058 | } |
| 1059 | |
| 1060 | static void iscsit_handle_nopin_timeout(unsigned long data) |
| 1061 | { |
| 1062 | struct iscsi_conn *conn = (struct iscsi_conn *) data; |
| 1063 | |
| 1064 | iscsit_inc_conn_usage_count(conn); |
| 1065 | |
| 1066 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1067 | if (conn->nopin_timer_flags & ISCSI_TF_STOP) { |
| 1068 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1069 | iscsit_dec_conn_usage_count(conn); |
| 1070 | return; |
| 1071 | } |
| 1072 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; |
| 1073 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1074 | |
| 1075 | iscsit_add_nopin(conn, 1); |
| 1076 | iscsit_dec_conn_usage_count(conn); |
| 1077 | } |
| 1078 | |
| 1079 | /* |
| 1080 | * Called with conn->nopin_timer_lock held. |
| 1081 | */ |
| 1082 | void __iscsit_start_nopin_timer(struct iscsi_conn *conn) |
| 1083 | { |
| 1084 | struct iscsi_session *sess = conn->sess; |
| 1085 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
| 1086 | /* |
| 1087 | * NOPIN timeout is disabled. |
| 1088 | */ |
| 1089 | if (!na->nopin_timeout) |
| 1090 | return; |
| 1091 | |
| 1092 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) |
| 1093 | return; |
| 1094 | |
| 1095 | init_timer(&conn->nopin_timer); |
| 1096 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); |
| 1097 | conn->nopin_timer.data = (unsigned long)conn; |
| 1098 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; |
| 1099 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; |
| 1100 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; |
| 1101 | add_timer(&conn->nopin_timer); |
| 1102 | |
| 1103 | pr_debug("Started NOPIN Timer on CID: %d at %u second" |
| 1104 | " interval\n", conn->cid, na->nopin_timeout); |
| 1105 | } |
| 1106 | |
| 1107 | void iscsit_start_nopin_timer(struct iscsi_conn *conn) |
| 1108 | { |
| 1109 | struct iscsi_session *sess = conn->sess; |
| 1110 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
| 1111 | /* |
| 1112 | * NOPIN timeout is disabled.. |
| 1113 | */ |
| 1114 | if (!na->nopin_timeout) |
| 1115 | return; |
| 1116 | |
| 1117 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1118 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { |
| 1119 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1120 | return; |
| 1121 | } |
| 1122 | |
| 1123 | init_timer(&conn->nopin_timer); |
| 1124 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); |
| 1125 | conn->nopin_timer.data = (unsigned long)conn; |
| 1126 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; |
| 1127 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; |
| 1128 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; |
| 1129 | add_timer(&conn->nopin_timer); |
| 1130 | |
| 1131 | pr_debug("Started NOPIN Timer on CID: %d at %u second" |
| 1132 | " interval\n", conn->cid, na->nopin_timeout); |
| 1133 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1134 | } |
| 1135 | |
| 1136 | void iscsit_stop_nopin_timer(struct iscsi_conn *conn) |
| 1137 | { |
| 1138 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1139 | if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { |
| 1140 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1141 | return; |
| 1142 | } |
| 1143 | conn->nopin_timer_flags |= ISCSI_TF_STOP; |
| 1144 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1145 | |
| 1146 | del_timer_sync(&conn->nopin_timer); |
| 1147 | |
| 1148 | spin_lock_bh(&conn->nopin_timer_lock); |
| 1149 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; |
| 1150 | spin_unlock_bh(&conn->nopin_timer_lock); |
| 1151 | } |
| 1152 | |
| 1153 | int iscsit_send_tx_data( |
| 1154 | struct iscsi_cmd *cmd, |
| 1155 | struct iscsi_conn *conn, |
| 1156 | int use_misc) |
| 1157 | { |
| 1158 | int tx_sent, tx_size; |
| 1159 | u32 iov_count; |
| 1160 | struct kvec *iov; |
| 1161 | |
| 1162 | send_data: |
| 1163 | tx_size = cmd->tx_size; |
| 1164 | |
| 1165 | if (!use_misc) { |
| 1166 | iov = &cmd->iov_data[0]; |
| 1167 | iov_count = cmd->iov_data_count; |
| 1168 | } else { |
| 1169 | iov = &cmd->iov_misc[0]; |
| 1170 | iov_count = cmd->iov_misc_count; |
| 1171 | } |
| 1172 | |
| 1173 | tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); |
| 1174 | if (tx_size != tx_sent) { |
| 1175 | if (tx_sent == -EAGAIN) { |
| 1176 | pr_err("tx_data() returned -EAGAIN\n"); |
| 1177 | goto send_data; |
| 1178 | } else |
| 1179 | return -1; |
| 1180 | } |
| 1181 | cmd->tx_size = 0; |
| 1182 | |
| 1183 | return 0; |
| 1184 | } |
| 1185 | |
| 1186 | int iscsit_fe_sendpage_sg( |
| 1187 | struct iscsi_cmd *cmd, |
| 1188 | struct iscsi_conn *conn) |
| 1189 | { |
| 1190 | struct scatterlist *sg = cmd->first_data_sg; |
| 1191 | struct kvec iov; |
| 1192 | u32 tx_hdr_size, data_len; |
| 1193 | u32 offset = cmd->first_data_sg_off; |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1194 | int tx_sent, iov_off; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1195 | |
| 1196 | send_hdr: |
| 1197 | tx_hdr_size = ISCSI_HDR_LEN; |
| 1198 | if (conn->conn_ops->HeaderDigest) |
| 1199 | tx_hdr_size += ISCSI_CRC_LEN; |
| 1200 | |
| 1201 | iov.iov_base = cmd->pdu; |
| 1202 | iov.iov_len = tx_hdr_size; |
| 1203 | |
| 1204 | tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); |
| 1205 | if (tx_hdr_size != tx_sent) { |
| 1206 | if (tx_sent == -EAGAIN) { |
| 1207 | pr_err("tx_data() returned -EAGAIN\n"); |
| 1208 | goto send_hdr; |
| 1209 | } |
| 1210 | return -1; |
| 1211 | } |
| 1212 | |
| 1213 | data_len = cmd->tx_size - tx_hdr_size - cmd->padding; |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1214 | /* |
| 1215 | * Set iov_off used by padding and data digest tx_data() calls below |
| 1216 | * in order to determine proper offset into cmd->iov_data[] |
| 1217 | */ |
| 1218 | if (conn->conn_ops->DataDigest) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1219 | data_len -= ISCSI_CRC_LEN; |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1220 | if (cmd->padding) |
| 1221 | iov_off = (cmd->iov_data_count - 2); |
| 1222 | else |
| 1223 | iov_off = (cmd->iov_data_count - 1); |
| 1224 | } else { |
| 1225 | iov_off = (cmd->iov_data_count - 1); |
| 1226 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1227 | /* |
| 1228 | * Perform sendpage() for each page in the scatterlist |
| 1229 | */ |
| 1230 | while (data_len) { |
| 1231 | u32 space = (sg->length - offset); |
| 1232 | u32 sub_len = min_t(u32, data_len, space); |
| 1233 | send_pg: |
| 1234 | tx_sent = conn->sock->ops->sendpage(conn->sock, |
| 1235 | sg_page(sg), sg->offset + offset, sub_len, 0); |
| 1236 | if (tx_sent != sub_len) { |
| 1237 | if (tx_sent == -EAGAIN) { |
| 1238 | pr_err("tcp_sendpage() returned" |
| 1239 | " -EAGAIN\n"); |
| 1240 | goto send_pg; |
| 1241 | } |
| 1242 | |
| 1243 | pr_err("tcp_sendpage() failure: %d\n", |
| 1244 | tx_sent); |
| 1245 | return -1; |
| 1246 | } |
| 1247 | |
| 1248 | data_len -= sub_len; |
| 1249 | offset = 0; |
| 1250 | sg = sg_next(sg); |
| 1251 | } |
| 1252 | |
| 1253 | send_padding: |
| 1254 | if (cmd->padding) { |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1255 | struct kvec *iov_p = &cmd->iov_data[iov_off++]; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1256 | |
| 1257 | tx_sent = tx_data(conn, iov_p, 1, cmd->padding); |
| 1258 | if (cmd->padding != tx_sent) { |
| 1259 | if (tx_sent == -EAGAIN) { |
| 1260 | pr_err("tx_data() returned -EAGAIN\n"); |
| 1261 | goto send_padding; |
| 1262 | } |
| 1263 | return -1; |
| 1264 | } |
| 1265 | } |
| 1266 | |
| 1267 | send_datacrc: |
| 1268 | if (conn->conn_ops->DataDigest) { |
Nicholas Bellinger | 40b0549 | 2011-09-16 16:55:47 -0700 | [diff] [blame] | 1269 | struct kvec *iov_d = &cmd->iov_data[iov_off]; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1270 | |
| 1271 | tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); |
| 1272 | if (ISCSI_CRC_LEN != tx_sent) { |
| 1273 | if (tx_sent == -EAGAIN) { |
| 1274 | pr_err("tx_data() returned -EAGAIN\n"); |
| 1275 | goto send_datacrc; |
| 1276 | } |
| 1277 | return -1; |
| 1278 | } |
| 1279 | } |
| 1280 | |
| 1281 | return 0; |
| 1282 | } |
| 1283 | |
| 1284 | /* |
| 1285 | * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU |
| 1286 | * back to the Initiator when an expection condition occurs with the |
| 1287 | * errors set in status_class and status_detail. |
| 1288 | * |
| 1289 | * Parameters: iSCSI Connection, Status Class, Status Detail. |
| 1290 | * Returns: 0 on success, -1 on error. |
| 1291 | */ |
| 1292 | int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) |
| 1293 | { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1294 | struct iscsi_login_rsp *hdr; |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1295 | struct iscsi_login *login = conn->conn_login; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1296 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1297 | login->login_failed = 1; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1298 | iscsit_collect_login_stats(conn, status_class, status_detail); |
| 1299 | |
Nicholas Bellinger | 6834975 | 2014-06-17 21:54:38 +0000 | [diff] [blame] | 1300 | memset(&login->rsp[0], 0, ISCSI_HDR_LEN); |
| 1301 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1302 | hdr = (struct iscsi_login_rsp *)&login->rsp[0]; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1303 | hdr->opcode = ISCSI_OP_LOGIN_RSP; |
| 1304 | hdr->status_class = status_class; |
| 1305 | hdr->status_detail = status_detail; |
Christoph Hellwig | 66c7db6 | 2012-09-26 08:00:39 -0400 | [diff] [blame] | 1306 | hdr->itt = conn->login_itt; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1307 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1308 | return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1309 | } |
| 1310 | |
| 1311 | void iscsit_print_session_params(struct iscsi_session *sess) |
| 1312 | { |
| 1313 | struct iscsi_conn *conn; |
| 1314 | |
| 1315 | pr_debug("-----------------------------[Session Params for" |
| 1316 | " SID: %u]-----------------------------\n", sess->sid); |
| 1317 | spin_lock_bh(&sess->conn_lock); |
| 1318 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) |
| 1319 | iscsi_dump_conn_ops(conn->conn_ops); |
| 1320 | spin_unlock_bh(&sess->conn_lock); |
| 1321 | |
| 1322 | iscsi_dump_sess_ops(sess->sess_ops); |
| 1323 | } |
| 1324 | |
| 1325 | static int iscsit_do_rx_data( |
| 1326 | struct iscsi_conn *conn, |
| 1327 | struct iscsi_data_count *count) |
| 1328 | { |
Al Viro | e5a4b0b | 2014-11-24 18:17:55 -0500 | [diff] [blame] | 1329 | int data = count->data_length, rx_loop = 0, total_rx = 0; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1330 | struct msghdr msg; |
| 1331 | |
| 1332 | if (!conn || !conn->sock || !conn->conn_ops) |
| 1333 | return -1; |
| 1334 | |
| 1335 | memset(&msg, 0, sizeof(struct msghdr)); |
Al Viro | e5a4b0b | 2014-11-24 18:17:55 -0500 | [diff] [blame] | 1336 | iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, |
| 1337 | count->iov, count->iov_count, data); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1338 | |
| 1339 | while (total_rx < data) { |
Al Viro | e5a4b0b | 2014-11-24 18:17:55 -0500 | [diff] [blame] | 1340 | rx_loop = sock_recvmsg(conn->sock, &msg, |
| 1341 | (data - total_rx), MSG_WAITALL); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1342 | if (rx_loop <= 0) { |
| 1343 | pr_debug("rx_loop: %d total_rx: %d\n", |
| 1344 | rx_loop, total_rx); |
| 1345 | return rx_loop; |
| 1346 | } |
| 1347 | total_rx += rx_loop; |
| 1348 | pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", |
| 1349 | rx_loop, total_rx, data); |
| 1350 | } |
| 1351 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1352 | return total_rx; |
| 1353 | } |
| 1354 | |
| 1355 | static int iscsit_do_tx_data( |
| 1356 | struct iscsi_conn *conn, |
| 1357 | struct iscsi_data_count *count) |
| 1358 | { |
Nicholas Bellinger | 6bf6ca7 | 2014-11-20 20:50:07 -0800 | [diff] [blame] | 1359 | int ret, iov_len; |
Nicholas Bellinger | 2ff017f | 2011-09-16 01:44:54 -0700 | [diff] [blame] | 1360 | struct kvec *iov_p; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1361 | struct msghdr msg; |
| 1362 | |
| 1363 | if (!conn || !conn->sock || !conn->conn_ops) |
| 1364 | return -1; |
| 1365 | |
Nicholas Bellinger | 6bf6ca7 | 2014-11-20 20:50:07 -0800 | [diff] [blame] | 1366 | if (count->data_length <= 0) { |
| 1367 | pr_err("Data length is: %d\n", count->data_length); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1368 | return -1; |
| 1369 | } |
| 1370 | |
| 1371 | memset(&msg, 0, sizeof(struct msghdr)); |
| 1372 | |
Nicholas Bellinger | 2ff017f | 2011-09-16 01:44:54 -0700 | [diff] [blame] | 1373 | iov_p = count->iov; |
| 1374 | iov_len = count->iov_count; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1375 | |
Nicholas Bellinger | 6bf6ca7 | 2014-11-20 20:50:07 -0800 | [diff] [blame] | 1376 | ret = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, |
| 1377 | count->data_length); |
| 1378 | if (ret != count->data_length) { |
| 1379 | pr_err("Unexpected ret: %d send data %d\n", |
| 1380 | ret, count->data_length); |
| 1381 | return -EPIPE; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1382 | } |
Nicholas Bellinger | 6bf6ca7 | 2014-11-20 20:50:07 -0800 | [diff] [blame] | 1383 | pr_debug("ret: %d, sent data: %d\n", ret, count->data_length); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1384 | |
Nicholas Bellinger | 6bf6ca7 | 2014-11-20 20:50:07 -0800 | [diff] [blame] | 1385 | return ret; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1386 | } |
| 1387 | |
| 1388 | int rx_data( |
| 1389 | struct iscsi_conn *conn, |
| 1390 | struct kvec *iov, |
| 1391 | int iov_count, |
| 1392 | int data) |
| 1393 | { |
| 1394 | struct iscsi_data_count c; |
| 1395 | |
| 1396 | if (!conn || !conn->sock || !conn->conn_ops) |
| 1397 | return -1; |
| 1398 | |
| 1399 | memset(&c, 0, sizeof(struct iscsi_data_count)); |
| 1400 | c.iov = iov; |
| 1401 | c.iov_count = iov_count; |
| 1402 | c.data_length = data; |
| 1403 | c.type = ISCSI_RX_DATA; |
| 1404 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1405 | return iscsit_do_rx_data(conn, &c); |
| 1406 | } |
| 1407 | |
| 1408 | int tx_data( |
| 1409 | struct iscsi_conn *conn, |
| 1410 | struct kvec *iov, |
| 1411 | int iov_count, |
| 1412 | int data) |
| 1413 | { |
| 1414 | struct iscsi_data_count c; |
| 1415 | |
| 1416 | if (!conn || !conn->sock || !conn->conn_ops) |
| 1417 | return -1; |
| 1418 | |
| 1419 | memset(&c, 0, sizeof(struct iscsi_data_count)); |
| 1420 | c.iov = iov; |
| 1421 | c.iov_count = iov_count; |
| 1422 | c.data_length = data; |
| 1423 | c.type = ISCSI_TX_DATA; |
| 1424 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1425 | return iscsit_do_tx_data(conn, &c); |
| 1426 | } |
| 1427 | |
| 1428 | void iscsit_collect_login_stats( |
| 1429 | struct iscsi_conn *conn, |
| 1430 | u8 status_class, |
| 1431 | u8 status_detail) |
| 1432 | { |
| 1433 | struct iscsi_param *intrname = NULL; |
| 1434 | struct iscsi_tiqn *tiqn; |
| 1435 | struct iscsi_login_stats *ls; |
| 1436 | |
| 1437 | tiqn = iscsit_snmp_get_tiqn(conn); |
| 1438 | if (!tiqn) |
| 1439 | return; |
| 1440 | |
| 1441 | ls = &tiqn->login_stats; |
| 1442 | |
| 1443 | spin_lock(&ls->lock); |
| 1444 | if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && |
| 1445 | ((get_jiffies_64() - ls->last_fail_time) < 10)) { |
| 1446 | /* We already have the failure info for this login */ |
| 1447 | spin_unlock(&ls->lock); |
| 1448 | return; |
| 1449 | } |
| 1450 | |
| 1451 | if (status_class == ISCSI_STATUS_CLS_SUCCESS) |
| 1452 | ls->accepts++; |
| 1453 | else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { |
| 1454 | ls->redirects++; |
| 1455 | ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; |
| 1456 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && |
| 1457 | (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { |
| 1458 | ls->authenticate_fails++; |
| 1459 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; |
| 1460 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && |
| 1461 | (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { |
| 1462 | ls->authorize_fails++; |
| 1463 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; |
| 1464 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && |
| 1465 | (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { |
| 1466 | ls->negotiate_fails++; |
| 1467 | ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; |
| 1468 | } else { |
| 1469 | ls->other_fails++; |
| 1470 | ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; |
| 1471 | } |
| 1472 | |
| 1473 | /* Save initiator name, ip address and time, if it is a failed login */ |
| 1474 | if (status_class != ISCSI_STATUS_CLS_SUCCESS) { |
| 1475 | if (conn->param_list) |
| 1476 | intrname = iscsi_find_param_from_key(INITIATORNAME, |
| 1477 | conn->param_list); |
Joern Engel | fdc84d1 | 2014-09-02 17:49:55 -0400 | [diff] [blame] | 1478 | strlcpy(ls->last_intr_fail_name, |
| 1479 | (intrname ? intrname->value : "Unknown"), |
| 1480 | sizeof(ls->last_intr_fail_name)); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1481 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1482 | ls->last_intr_fail_ip_family = conn->login_family; |
| 1483 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1484 | snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, |
| 1485 | "%s", conn->login_ip); |
| 1486 | ls->last_fail_time = get_jiffies_64(); |
| 1487 | } |
| 1488 | |
| 1489 | spin_unlock(&ls->lock); |
| 1490 | } |
| 1491 | |
| 1492 | struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) |
| 1493 | { |
| 1494 | struct iscsi_portal_group *tpg; |
| 1495 | |
| 1496 | if (!conn || !conn->sess) |
| 1497 | return NULL; |
| 1498 | |
| 1499 | tpg = conn->sess->tpg; |
| 1500 | if (!tpg) |
| 1501 | return NULL; |
| 1502 | |
| 1503 | if (!tpg->tpg_tiqn) |
| 1504 | return NULL; |
| 1505 | |
| 1506 | return tpg->tpg_tiqn; |
| 1507 | } |