1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the iSCSI Target specific utility functions. 3e48354ceSNicholas Bellinger * 4e48354ceSNicholas Bellinger * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Licensed to the Linux Foundation under the General Public License (GPL) version 2. 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 9e48354ceSNicholas Bellinger * 10e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 11e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 12e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 13e48354ceSNicholas Bellinger * (at your option) any later version. 14e48354ceSNicholas Bellinger * 15e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 16e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 17e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18e48354ceSNicholas Bellinger * GNU General Public License for more details. 19e48354ceSNicholas Bellinger ******************************************************************************/ 20e48354ceSNicholas Bellinger 21e48354ceSNicholas Bellinger #include <linux/list.h> 22e48354ceSNicholas Bellinger #include <scsi/scsi_tcq.h> 23e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 24e48354ceSNicholas Bellinger #include <target/target_core_base.h> 25c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 26e48354ceSNicholas Bellinger #include <target/target_core_configfs.h> 27e48354ceSNicholas Bellinger 28e48354ceSNicholas Bellinger #include "iscsi_target_core.h" 29e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 30e48354ceSNicholas Bellinger #include "iscsi_target_seq_pdu_list.h" 31e48354ceSNicholas Bellinger #include "iscsi_target_datain_values.h" 32e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 33e48354ceSNicholas Bellinger #include "iscsi_target_erl1.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_tq.h" 37e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 38e48354ceSNicholas Bellinger #include "iscsi_target.h" 39e48354ceSNicholas Bellinger 40e48354ceSNicholas Bellinger #define PRINT_BUFF(buff, len) \ 41e48354ceSNicholas Bellinger { \ 42e48354ceSNicholas Bellinger int zzz; \ 43e48354ceSNicholas Bellinger \ 44e48354ceSNicholas Bellinger pr_debug("%d:\n", __LINE__); \ 45e48354ceSNicholas Bellinger for (zzz = 0; zzz < len; zzz++) { \ 46e48354ceSNicholas Bellinger if (zzz % 16 == 0) { \ 47e48354ceSNicholas Bellinger if (zzz) \ 48e48354ceSNicholas Bellinger pr_debug("\n"); \ 49e48354ceSNicholas Bellinger pr_debug("%4i: ", zzz); \ 50e48354ceSNicholas Bellinger } \ 51e48354ceSNicholas Bellinger pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 52e48354ceSNicholas Bellinger } \ 53e48354ceSNicholas Bellinger if ((len + 1) % 16) \ 54e48354ceSNicholas Bellinger pr_debug("\n"); \ 55e48354ceSNicholas Bellinger } 56e48354ceSNicholas Bellinger 57e48354ceSNicholas Bellinger extern struct list_head g_tiqn_list; 58e48354ceSNicholas Bellinger extern spinlock_t tiqn_lock; 59e48354ceSNicholas Bellinger 60e48354ceSNicholas Bellinger /* 61e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 62e48354ceSNicholas Bellinger */ 63e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 64e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 65e48354ceSNicholas Bellinger u32 offset, 66e48354ceSNicholas Bellinger u32 xfer_len, 67e48354ceSNicholas Bellinger int recovery, 68e48354ceSNicholas Bellinger u32 r2t_sn) 69e48354ceSNicholas Bellinger { 70e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 71e48354ceSNicholas Bellinger 72e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 73e48354ceSNicholas Bellinger if (!r2t) { 74e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 75e48354ceSNicholas Bellinger return -1; 76e48354ceSNicholas Bellinger } 77e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 78e48354ceSNicholas Bellinger 79e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 80e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 81e48354ceSNicholas Bellinger r2t->offset = offset; 82e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 83e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 84e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 85e48354ceSNicholas Bellinger 86e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 87e48354ceSNicholas Bellinger 88e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 89e48354ceSNicholas Bellinger return 0; 90e48354ceSNicholas Bellinger } 91e48354ceSNicholas Bellinger 92e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 93e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 94e48354ceSNicholas Bellinger u32 offset, 95e48354ceSNicholas Bellinger u32 length) 96e48354ceSNicholas Bellinger { 97e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 98e48354ceSNicholas Bellinger 99e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 100e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 101e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 102e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 103e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 104e48354ceSNicholas Bellinger return r2t; 105e48354ceSNicholas Bellinger } 106e48354ceSNicholas Bellinger } 107e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 108e48354ceSNicholas Bellinger 109e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 110e48354ceSNicholas Bellinger " %u\n", offset, length); 111e48354ceSNicholas Bellinger return NULL; 112e48354ceSNicholas Bellinger } 113e48354ceSNicholas Bellinger 114e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 115e48354ceSNicholas Bellinger { 116e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 117e48354ceSNicholas Bellinger 118e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 119e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 120e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 121e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 122e48354ceSNicholas Bellinger return r2t; 123e48354ceSNicholas Bellinger } 124e48354ceSNicholas Bellinger } 125e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 126e48354ceSNicholas Bellinger 127e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 128e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 129e48354ceSNicholas Bellinger return NULL; 130e48354ceSNicholas Bellinger } 131e48354ceSNicholas Bellinger 132e48354ceSNicholas Bellinger /* 133e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 134e48354ceSNicholas Bellinger */ 135e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 136e48354ceSNicholas Bellinger { 137e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 138e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 139e48354ceSNicholas Bellinger } 140e48354ceSNicholas Bellinger 141e48354ceSNicholas Bellinger void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 142e48354ceSNicholas Bellinger { 143e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 144e48354ceSNicholas Bellinger 145e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 146e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 147e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 148e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 149e48354ceSNicholas Bellinger } 150e48354ceSNicholas Bellinger 151e48354ceSNicholas Bellinger /* 152e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 153e48354ceSNicholas Bellinger * iSCSI NopINs. 154e48354ceSNicholas Bellinger */ 155e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) 156e48354ceSNicholas Bellinger { 157e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 158e48354ceSNicholas Bellinger 159e48354ceSNicholas Bellinger cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask); 160e48354ceSNicholas Bellinger if (!cmd) { 161e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_cmd.\n"); 162e48354ceSNicholas Bellinger return NULL; 163e48354ceSNicholas Bellinger } 164e48354ceSNicholas Bellinger 165e48354ceSNicholas Bellinger cmd->conn = conn; 1662fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 167e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 168e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 169e48354ceSNicholas Bellinger init_completion(&cmd->reject_comp); 170e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 171e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 172e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 173e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 174e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 175e48354ceSNicholas Bellinger 176e48354ceSNicholas Bellinger return cmd; 177e48354ceSNicholas Bellinger } 178e48354ceSNicholas Bellinger 179e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 180e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 181e48354ceSNicholas Bellinger u32 seq_send_order) 182e48354ceSNicholas Bellinger { 183e48354ceSNicholas Bellinger u32 i; 184e48354ceSNicholas Bellinger 185e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 186e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 187e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 188e48354ceSNicholas Bellinger 189e48354ceSNicholas Bellinger return NULL; 190e48354ceSNicholas Bellinger } 191e48354ceSNicholas Bellinger 192e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 193e48354ceSNicholas Bellinger { 194e48354ceSNicholas Bellinger u32 i; 195e48354ceSNicholas Bellinger 196e48354ceSNicholas Bellinger if (!cmd->seq_list) { 197e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 198e48354ceSNicholas Bellinger return NULL; 199e48354ceSNicholas Bellinger } 200e48354ceSNicholas Bellinger 201e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 202e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 203e48354ceSNicholas Bellinger continue; 204e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 205e48354ceSNicholas Bellinger cmd->seq_send_order++; 206e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 207e48354ceSNicholas Bellinger } 208e48354ceSNicholas Bellinger } 209e48354ceSNicholas Bellinger 210e48354ceSNicholas Bellinger return NULL; 211e48354ceSNicholas Bellinger } 212e48354ceSNicholas Bellinger 213e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 214e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 215e48354ceSNicholas Bellinger u32 r2t_sn) 216e48354ceSNicholas Bellinger { 217e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 218e48354ceSNicholas Bellinger 219e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 220e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 221e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 222e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 223e48354ceSNicholas Bellinger return r2t; 224e48354ceSNicholas Bellinger } 225e48354ceSNicholas Bellinger } 226e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 227e48354ceSNicholas Bellinger 228e48354ceSNicholas Bellinger return NULL; 229e48354ceSNicholas Bellinger } 230e48354ceSNicholas Bellinger 231e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 232e48354ceSNicholas Bellinger { 233e48354ceSNicholas Bellinger int ret; 234e48354ceSNicholas Bellinger 235e48354ceSNicholas Bellinger /* 236e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 237e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 238e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 239e48354ceSNicholas Bellinger * CRC failures. 240e48354ceSNicholas Bellinger */ 241e48354ceSNicholas Bellinger if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { 242e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 243e48354ceSNicholas Bellinger " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn, 244e48354ceSNicholas Bellinger sess->max_cmd_sn); 245e48354ceSNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 246e48354ceSNicholas Bellinger 247e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 248e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 249e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 250e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 251e48354ceSNicholas Bellinger sess->exp_cmd_sn); 252e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 253e48354ceSNicholas Bellinger 254e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 255e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 256e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 257e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 258e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 259e48354ceSNicholas Bellinger 260e48354ceSNicholas Bellinger } else { 261e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 262e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 263e48354ceSNicholas Bellinger sess->exp_cmd_sn); 264e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 265e48354ceSNicholas Bellinger } 266e48354ceSNicholas Bellinger 267e48354ceSNicholas Bellinger return ret; 268e48354ceSNicholas Bellinger } 269e48354ceSNicholas Bellinger 270e48354ceSNicholas Bellinger /* 271e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 272e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 273e48354ceSNicholas Bellinger */ 274e48354ceSNicholas Bellinger int iscsit_sequence_cmd( 275e48354ceSNicholas Bellinger struct iscsi_conn *conn, 276e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 27750e5c87dSChristoph Hellwig __be32 cmdsn) 278e48354ceSNicholas Bellinger { 279e48354ceSNicholas Bellinger int ret; 280e48354ceSNicholas Bellinger int cmdsn_ret; 281e48354ceSNicholas Bellinger 282e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 283e48354ceSNicholas Bellinger 28450e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 285e48354ceSNicholas Bellinger switch (cmdsn_ret) { 286e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 287e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 288e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 289e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 290e48354ceSNicholas Bellinger break; 291e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 29250e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 293e48354ceSNicholas Bellinger break; 294e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 295e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 296e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 297e48354ceSNicholas Bellinger ret = cmdsn_ret; 298e48354ceSNicholas Bellinger break; 299e48354ceSNicholas Bellinger default: 300e48354ceSNicholas Bellinger ret = cmdsn_ret; 301e48354ceSNicholas Bellinger break; 302e48354ceSNicholas Bellinger } 303e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 304e48354ceSNicholas Bellinger 305e48354ceSNicholas Bellinger return ret; 306e48354ceSNicholas Bellinger } 307e48354ceSNicholas Bellinger 308e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 309e48354ceSNicholas Bellinger { 310e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 311e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 312e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 313e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 314e48354ceSNicholas Bellinger 315e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 316e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 317e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 318e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 319e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 320e48354ceSNicholas Bellinger return -1; 321e48354ceSNicholas Bellinger } 322e48354ceSNicholas Bellinger 323e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 324e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 325e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 326e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 327e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 328e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 329e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 330e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 331e48354ceSNicholas Bellinger return -1; 332e48354ceSNicholas Bellinger } 333e48354ceSNicholas Bellinger 334e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 335e48354ceSNicholas Bellinger return 0; 336e48354ceSNicholas Bellinger 337ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 338e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 339e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 340e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 341e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 342e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 343e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 344ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 345e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 346e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 347e48354ceSNicholas Bellinger return -1; 348e48354ceSNicholas Bellinger } 349e48354ceSNicholas Bellinger return 0; 350e48354ceSNicholas Bellinger } 351e48354ceSNicholas Bellinger 352e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 353e48354ceSNicholas Bellinger struct iscsi_conn *conn, 35466c7db68SChristoph Hellwig itt_t init_task_tag) 355e48354ceSNicholas Bellinger { 356e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 357e48354ceSNicholas Bellinger 358e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3592fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 360e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 361e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 362e48354ceSNicholas Bellinger return cmd; 363e48354ceSNicholas Bellinger } 364e48354ceSNicholas Bellinger } 365e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 366e48354ceSNicholas Bellinger 367e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 368e48354ceSNicholas Bellinger init_task_tag, conn->cid); 369e48354ceSNicholas Bellinger return NULL; 370e48354ceSNicholas Bellinger } 371e48354ceSNicholas Bellinger 372e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 373e48354ceSNicholas Bellinger struct iscsi_conn *conn, 37466c7db68SChristoph Hellwig itt_t init_task_tag, 375e48354ceSNicholas Bellinger u32 length) 376e48354ceSNicholas Bellinger { 377e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 378e48354ceSNicholas Bellinger 379e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3802fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 381e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 382e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 383e48354ceSNicholas Bellinger return cmd; 384e48354ceSNicholas Bellinger } 385e48354ceSNicholas Bellinger } 386e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 387e48354ceSNicholas Bellinger 388e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 389e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 390e48354ceSNicholas Bellinger if (length) 391e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 392e48354ceSNicholas Bellinger 393e48354ceSNicholas Bellinger return NULL; 394e48354ceSNicholas Bellinger } 395e48354ceSNicholas Bellinger 396e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 397e48354ceSNicholas Bellinger struct iscsi_conn *conn, 398e48354ceSNicholas Bellinger u32 targ_xfer_tag) 399e48354ceSNicholas Bellinger { 400e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 401e48354ceSNicholas Bellinger 402e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4032fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 404e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 405e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 406e48354ceSNicholas Bellinger return cmd; 407e48354ceSNicholas Bellinger } 408e48354ceSNicholas Bellinger } 409e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 410e48354ceSNicholas Bellinger 411e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 412e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 413e48354ceSNicholas Bellinger return NULL; 414e48354ceSNicholas Bellinger } 415e48354ceSNicholas Bellinger 416e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 417e48354ceSNicholas Bellinger struct iscsi_session *sess, 418e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 419e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 42066c7db68SChristoph Hellwig itt_t init_task_tag) 421e48354ceSNicholas Bellinger { 422e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 423e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 424e48354ceSNicholas Bellinger /* 425e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 426e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 427e48354ceSNicholas Bellinger */ 428e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 429e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 430e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4312fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 432e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 433e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 434e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 435e48354ceSNicholas Bellinger 436e48354ceSNicholas Bellinger *cr_ptr = cr; 437e48354ceSNicholas Bellinger *cmd_ptr = cmd; 438e48354ceSNicholas Bellinger return -2; 439e48354ceSNicholas Bellinger } 440e48354ceSNicholas Bellinger } 441e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 442e48354ceSNicholas Bellinger } 443e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 444e48354ceSNicholas Bellinger /* 445e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 446e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 447e48354ceSNicholas Bellinger */ 448e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 449e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 450e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4512fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 452e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 453e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 454e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 455e48354ceSNicholas Bellinger 456e48354ceSNicholas Bellinger *cr_ptr = cr; 457e48354ceSNicholas Bellinger *cmd_ptr = cmd; 458e48354ceSNicholas Bellinger return 0; 459e48354ceSNicholas Bellinger } 460e48354ceSNicholas Bellinger } 461e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 462e48354ceSNicholas Bellinger } 463e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 464e48354ceSNicholas Bellinger 465e48354ceSNicholas Bellinger return -1; 466e48354ceSNicholas Bellinger } 467e48354ceSNicholas Bellinger 468e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 469e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 470e48354ceSNicholas Bellinger struct iscsi_conn *conn, 471e48354ceSNicholas Bellinger u8 state) 472e48354ceSNicholas Bellinger { 473e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 474e48354ceSNicholas Bellinger 475e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 476e48354ceSNicholas Bellinger if (!qr) { 477e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 478e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 479e48354ceSNicholas Bellinger return; 480e48354ceSNicholas Bellinger } 481e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 482e48354ceSNicholas Bellinger qr->cmd = cmd; 483e48354ceSNicholas Bellinger qr->state = state; 484e48354ceSNicholas Bellinger 485e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 486e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 487e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 488e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 489e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 490e48354ceSNicholas Bellinger 491d5627acbSRoland Dreier wake_up(&conn->queues_wq); 492e48354ceSNicholas Bellinger } 493e48354ceSNicholas Bellinger 494e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 495e48354ceSNicholas Bellinger { 496e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 497e48354ceSNicholas Bellinger 498e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 499e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 500e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 501e48354ceSNicholas Bellinger return NULL; 502e48354ceSNicholas Bellinger } 503e48354ceSNicholas Bellinger list_for_each_entry(qr, &conn->immed_queue_list, qr_list) 504e48354ceSNicholas Bellinger break; 505e48354ceSNicholas Bellinger 506e48354ceSNicholas Bellinger list_del(&qr->qr_list); 507e48354ceSNicholas Bellinger if (qr->cmd) 508e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 509e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 510e48354ceSNicholas Bellinger 511e48354ceSNicholas Bellinger return qr; 512e48354ceSNicholas Bellinger } 513e48354ceSNicholas Bellinger 514e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 515e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 516e48354ceSNicholas Bellinger struct iscsi_conn *conn) 517e48354ceSNicholas Bellinger { 518e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 519e48354ceSNicholas Bellinger 520e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 521e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 522e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 523e48354ceSNicholas Bellinger return; 524e48354ceSNicholas Bellinger } 525e48354ceSNicholas Bellinger 526e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 527e48354ceSNicholas Bellinger if (qr->cmd != cmd) 528e48354ceSNicholas Bellinger continue; 529e48354ceSNicholas Bellinger 530e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 531e48354ceSNicholas Bellinger list_del(&qr->qr_list); 532e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 533e48354ceSNicholas Bellinger } 534e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 535e48354ceSNicholas Bellinger 536e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 537e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 538e48354ceSNicholas Bellinger cmd->init_task_tag, 539e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 540e48354ceSNicholas Bellinger } 541e48354ceSNicholas Bellinger } 542e48354ceSNicholas Bellinger 543e48354ceSNicholas Bellinger void iscsit_add_cmd_to_response_queue( 544e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 545e48354ceSNicholas Bellinger struct iscsi_conn *conn, 546e48354ceSNicholas Bellinger u8 state) 547e48354ceSNicholas Bellinger { 548e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 549e48354ceSNicholas Bellinger 550e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 551e48354ceSNicholas Bellinger if (!qr) { 552e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 553e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 554e48354ceSNicholas Bellinger return; 555e48354ceSNicholas Bellinger } 556e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 557e48354ceSNicholas Bellinger qr->cmd = cmd; 558e48354ceSNicholas Bellinger qr->state = state; 559e48354ceSNicholas Bellinger 560e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 561e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 562e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 563e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 564e48354ceSNicholas Bellinger 565d5627acbSRoland Dreier wake_up(&conn->queues_wq); 566e48354ceSNicholas Bellinger } 567e48354ceSNicholas Bellinger 568e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 569e48354ceSNicholas Bellinger { 570e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 571e48354ceSNicholas Bellinger 572e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 573e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 574e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 575e48354ceSNicholas Bellinger return NULL; 576e48354ceSNicholas Bellinger } 577e48354ceSNicholas Bellinger 578e48354ceSNicholas Bellinger list_for_each_entry(qr, &conn->response_queue_list, qr_list) 579e48354ceSNicholas Bellinger break; 580e48354ceSNicholas Bellinger 581e48354ceSNicholas Bellinger list_del(&qr->qr_list); 582e48354ceSNicholas Bellinger if (qr->cmd) 583e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 584e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 585e48354ceSNicholas Bellinger 586e48354ceSNicholas Bellinger return qr; 587e48354ceSNicholas Bellinger } 588e48354ceSNicholas Bellinger 589e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 590e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 591e48354ceSNicholas Bellinger struct iscsi_conn *conn) 592e48354ceSNicholas Bellinger { 593e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 594e48354ceSNicholas Bellinger 595e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 596e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 597e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 598e48354ceSNicholas Bellinger return; 599e48354ceSNicholas Bellinger } 600e48354ceSNicholas Bellinger 601e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 602e48354ceSNicholas Bellinger qr_list) { 603e48354ceSNicholas Bellinger if (qr->cmd != cmd) 604e48354ceSNicholas Bellinger continue; 605e48354ceSNicholas Bellinger 606e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 607e48354ceSNicholas Bellinger list_del(&qr->qr_list); 608e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 609e48354ceSNicholas Bellinger } 610e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 611e48354ceSNicholas Bellinger 612e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 613e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 614e48354ceSNicholas Bellinger cmd->init_task_tag, 615e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 616e48354ceSNicholas Bellinger } 617e48354ceSNicholas Bellinger } 618e48354ceSNicholas Bellinger 619d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 620d5627acbSRoland Dreier { 621d5627acbSRoland Dreier bool empty; 622d5627acbSRoland Dreier 623d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 624d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 625d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 626d5627acbSRoland Dreier 627d5627acbSRoland Dreier if (!empty) 628d5627acbSRoland Dreier return empty; 629d5627acbSRoland Dreier 630d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 631d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 632d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 633d5627acbSRoland Dreier 634d5627acbSRoland Dreier return empty; 635d5627acbSRoland Dreier } 636d5627acbSRoland Dreier 637e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 638e48354ceSNicholas Bellinger { 639e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 640e48354ceSNicholas Bellinger 641e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 642e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 643e48354ceSNicholas Bellinger list_del(&qr->qr_list); 644e48354ceSNicholas Bellinger if (qr->cmd) 645e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 646e48354ceSNicholas Bellinger 647e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 648e48354ceSNicholas Bellinger } 649e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 650e48354ceSNicholas Bellinger 651e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 652e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 653e48354ceSNicholas Bellinger qr_list) { 654e48354ceSNicholas Bellinger list_del(&qr->qr_list); 655e48354ceSNicholas Bellinger if (qr->cmd) 656e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 657e48354ceSNicholas Bellinger 658e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 659e48354ceSNicholas Bellinger } 660e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 661e48354ceSNicholas Bellinger } 662e48354ceSNicholas Bellinger 663e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 664e48354ceSNicholas Bellinger { 665e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 666e48354ceSNicholas Bellinger 667e48354ceSNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 668e48354ceSNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 669e48354ceSNicholas Bellinger 670e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 671e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 672e48354ceSNicholas Bellinger kfree(cmd->seq_list); 673e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 674e48354ceSNicholas Bellinger kfree(cmd->iov_data); 675e48354ceSNicholas Bellinger 676e48354ceSNicholas Bellinger if (conn) { 677e48354ceSNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 678e48354ceSNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 679e48354ceSNicholas Bellinger } 680e48354ceSNicholas Bellinger 681e48354ceSNicholas Bellinger kmem_cache_free(lio_cmd_cache, cmd); 682e48354ceSNicholas Bellinger } 683e48354ceSNicholas Bellinger 684d270190aSNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd) 685d270190aSNicholas Bellinger { 686d270190aSNicholas Bellinger /* 687d270190aSNicholas Bellinger * Determine if a struct se_cmd is assoicated with 688d270190aSNicholas Bellinger * this struct iscsi_cmd. 689d270190aSNicholas Bellinger */ 690d270190aSNicholas Bellinger switch (cmd->iscsi_opcode) { 691d270190aSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 692d270190aSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 693d270190aSNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 1); 694d270190aSNicholas Bellinger break; 695c1ce4bd5SNicholas Bellinger case ISCSI_OP_REJECT: 696c1ce4bd5SNicholas Bellinger /* 697c1ce4bd5SNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 698c1ce4bd5SNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 699c1ce4bd5SNicholas Bellinger * associated cmd->se_cmd needs to be released. 700c1ce4bd5SNicholas Bellinger */ 701c1ce4bd5SNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 702c1ce4bd5SNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 1); 703c1ce4bd5SNicholas Bellinger break; 704c1ce4bd5SNicholas Bellinger } 705c1ce4bd5SNicholas Bellinger /* Fall-through */ 706d270190aSNicholas Bellinger default: 707d270190aSNicholas Bellinger iscsit_release_cmd(cmd); 708d270190aSNicholas Bellinger break; 709d270190aSNicholas Bellinger } 710d270190aSNicholas Bellinger } 711d270190aSNicholas Bellinger 712e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 713e48354ceSNicholas Bellinger { 714e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 715e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 716e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 717e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 718e48354ceSNicholas Bellinger if (in_interrupt()) 719e48354ceSNicholas Bellinger return 2; 720e48354ceSNicholas Bellinger 721e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 722e48354ceSNicholas Bellinger return 1; 723e48354ceSNicholas Bellinger } 724e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 725e48354ceSNicholas Bellinger 726e48354ceSNicholas Bellinger return 0; 727e48354ceSNicholas Bellinger } 728e48354ceSNicholas Bellinger 729e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 730e48354ceSNicholas Bellinger { 731e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 732e48354ceSNicholas Bellinger sess->session_usage_count--; 733e48354ceSNicholas Bellinger 734e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 735e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 736e48354ceSNicholas Bellinger 737e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 738e48354ceSNicholas Bellinger } 739e48354ceSNicholas Bellinger 740e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 741e48354ceSNicholas Bellinger { 742e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 743e48354ceSNicholas Bellinger sess->session_usage_count++; 744e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 745e48354ceSNicholas Bellinger } 746e48354ceSNicholas Bellinger 747e48354ceSNicholas Bellinger /* 748e48354ceSNicholas Bellinger * Setup conn->if_marker and conn->of_marker values based upon 749e48354ceSNicholas Bellinger * the initial marker-less interval. (see iSCSI v19 A.2) 750e48354ceSNicholas Bellinger */ 751e48354ceSNicholas Bellinger int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) 752e48354ceSNicholas Bellinger { 753e48354ceSNicholas Bellinger int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; 754e48354ceSNicholas Bellinger /* 755e48354ceSNicholas Bellinger * IFMarkInt and OFMarkInt are negotiated as 32-bit words. 756e48354ceSNicholas Bellinger */ 757e48354ceSNicholas Bellinger u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); 758e48354ceSNicholas Bellinger u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); 759e48354ceSNicholas Bellinger 760e48354ceSNicholas Bellinger if (conn->conn_ops->OFMarker) { 761e48354ceSNicholas Bellinger /* 762e48354ceSNicholas Bellinger * Account for the first Login Command received not 763e48354ceSNicholas Bellinger * via iscsi_recv_msg(). 764e48354ceSNicholas Bellinger */ 765e48354ceSNicholas Bellinger conn->of_marker += ISCSI_HDR_LEN; 766e48354ceSNicholas Bellinger if (conn->of_marker <= OFMarkInt) { 767e48354ceSNicholas Bellinger conn->of_marker = (OFMarkInt - conn->of_marker); 768e48354ceSNicholas Bellinger } else { 769e48354ceSNicholas Bellinger login_ofmarker_count = (conn->of_marker / OFMarkInt); 770e48354ceSNicholas Bellinger next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + 771e48354ceSNicholas Bellinger (login_ofmarker_count * MARKER_SIZE); 772e48354ceSNicholas Bellinger conn->of_marker = (next_marker - conn->of_marker); 773e48354ceSNicholas Bellinger } 774e48354ceSNicholas Bellinger conn->of_marker_offset = 0; 775e48354ceSNicholas Bellinger pr_debug("Setting OFMarker value to %u based on Initial" 776e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->of_marker); 777e48354ceSNicholas Bellinger } 778e48354ceSNicholas Bellinger 779e48354ceSNicholas Bellinger if (conn->conn_ops->IFMarker) { 780e48354ceSNicholas Bellinger if (conn->if_marker <= IFMarkInt) { 781e48354ceSNicholas Bellinger conn->if_marker = (IFMarkInt - conn->if_marker); 782e48354ceSNicholas Bellinger } else { 783e48354ceSNicholas Bellinger login_ifmarker_count = (conn->if_marker / IFMarkInt); 784e48354ceSNicholas Bellinger next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + 785e48354ceSNicholas Bellinger (login_ifmarker_count * MARKER_SIZE); 786e48354ceSNicholas Bellinger conn->if_marker = (next_marker - conn->if_marker); 787e48354ceSNicholas Bellinger } 788e48354ceSNicholas Bellinger pr_debug("Setting IFMarker value to %u based on Initial" 789e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->if_marker); 790e48354ceSNicholas Bellinger } 791e48354ceSNicholas Bellinger 792e48354ceSNicholas Bellinger return 0; 793e48354ceSNicholas Bellinger } 794e48354ceSNicholas Bellinger 795e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 796e48354ceSNicholas Bellinger { 797e48354ceSNicholas Bellinger struct iscsi_conn *conn; 798e48354ceSNicholas Bellinger 799e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 800e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 801e48354ceSNicholas Bellinger if ((conn->cid == cid) && 802e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 803e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 804e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 805e48354ceSNicholas Bellinger return conn; 806e48354ceSNicholas Bellinger } 807e48354ceSNicholas Bellinger } 808e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 809e48354ceSNicholas Bellinger 810e48354ceSNicholas Bellinger return NULL; 811e48354ceSNicholas Bellinger } 812e48354ceSNicholas Bellinger 813e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 814e48354ceSNicholas Bellinger { 815e48354ceSNicholas Bellinger struct iscsi_conn *conn; 816e48354ceSNicholas Bellinger 817e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 818e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 819e48354ceSNicholas Bellinger if (conn->cid == cid) { 820e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 821e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 822e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 823e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 824e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 825e48354ceSNicholas Bellinger return conn; 826e48354ceSNicholas Bellinger } 827e48354ceSNicholas Bellinger } 828e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 829e48354ceSNicholas Bellinger 830e48354ceSNicholas Bellinger return NULL; 831e48354ceSNicholas Bellinger } 832e48354ceSNicholas Bellinger 833e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 834e48354ceSNicholas Bellinger { 835e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 836e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 837e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 838e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 839e48354ceSNicholas Bellinger 840e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 841e48354ceSNicholas Bellinger return; 842e48354ceSNicholas Bellinger } 843e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 844e48354ceSNicholas Bellinger } 845e48354ceSNicholas Bellinger 846e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 847e48354ceSNicholas Bellinger { 848e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 849e48354ceSNicholas Bellinger conn->conn_usage_count--; 850e48354ceSNicholas Bellinger 851e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 852e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 853e48354ceSNicholas Bellinger 854e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 855e48354ceSNicholas Bellinger } 856e48354ceSNicholas Bellinger 857e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 858e48354ceSNicholas Bellinger { 859e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 860e48354ceSNicholas Bellinger conn->conn_usage_count++; 861e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 862e48354ceSNicholas Bellinger } 863e48354ceSNicholas Bellinger 864e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 865e48354ceSNicholas Bellinger { 866e48354ceSNicholas Bellinger u8 state; 867e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 868e48354ceSNicholas Bellinger 869e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); 870e48354ceSNicholas Bellinger if (!cmd) 871e48354ceSNicholas Bellinger return -1; 872e48354ceSNicholas Bellinger 873e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 874e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 875e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 87666c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 877e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 878e48354ceSNicholas Bellinger cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : 879e48354ceSNicholas Bellinger 0xFFFFFFFF; 880e48354ceSNicholas Bellinger if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) 881e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 882e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 883e48354ceSNicholas Bellinger 884e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 8852fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 886e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 887e48354ceSNicholas Bellinger 888e48354ceSNicholas Bellinger if (want_response) 889e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 890e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 891e48354ceSNicholas Bellinger 892e48354ceSNicholas Bellinger return 0; 893e48354ceSNicholas Bellinger } 894e48354ceSNicholas Bellinger 895e48354ceSNicholas Bellinger static void iscsit_handle_nopin_response_timeout(unsigned long data) 896e48354ceSNicholas Bellinger { 897e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 898e48354ceSNicholas Bellinger 899e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 900e48354ceSNicholas Bellinger 901e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 902e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 903e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 904e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 905e48354ceSNicholas Bellinger return; 906e48354ceSNicholas Bellinger } 907e48354ceSNicholas Bellinger 908e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 909e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 910e48354ceSNicholas Bellinger conn->sess->sid); 911e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 912e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 913e48354ceSNicholas Bellinger 914e48354ceSNicholas Bellinger { 915e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 916e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 917e48354ceSNicholas Bellinger 918e48354ceSNicholas Bellinger if (tiqn) { 919e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 920e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9218359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 922e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 923e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 924e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 925e48354ceSNicholas Bellinger conn->sess->conn_timeout_errors++; 926e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 927e48354ceSNicholas Bellinger } 928e48354ceSNicholas Bellinger } 929e48354ceSNicholas Bellinger 930e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 931e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 932e48354ceSNicholas Bellinger } 933e48354ceSNicholas Bellinger 934e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 935e48354ceSNicholas Bellinger { 936e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 937e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 938e48354ceSNicholas Bellinger 939e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 940e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 941e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 942e48354ceSNicholas Bellinger return; 943e48354ceSNicholas Bellinger } 944e48354ceSNicholas Bellinger 945e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 946e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 947e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 948e48354ceSNicholas Bellinger } 949e48354ceSNicholas Bellinger 950e48354ceSNicholas Bellinger /* 951e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 952e48354ceSNicholas Bellinger */ 953e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 954e48354ceSNicholas Bellinger { 955e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 956e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 957e48354ceSNicholas Bellinger 958e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 959e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 960e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 961e48354ceSNicholas Bellinger return; 962e48354ceSNicholas Bellinger } 963e48354ceSNicholas Bellinger 964e48354ceSNicholas Bellinger init_timer(&conn->nopin_response_timer); 965e48354ceSNicholas Bellinger conn->nopin_response_timer.expires = 966e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ); 967e48354ceSNicholas Bellinger conn->nopin_response_timer.data = (unsigned long)conn; 968e48354ceSNicholas Bellinger conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 969e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 970e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 971e48354ceSNicholas Bellinger add_timer(&conn->nopin_response_timer); 972e48354ceSNicholas Bellinger 973e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 974e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 975e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 976e48354ceSNicholas Bellinger } 977e48354ceSNicholas Bellinger 978e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 979e48354ceSNicholas Bellinger { 980e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 981e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 982e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 983e48354ceSNicholas Bellinger return; 984e48354ceSNicholas Bellinger } 985e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 986e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 987e48354ceSNicholas Bellinger 988e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 989e48354ceSNicholas Bellinger 990e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 991e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 992e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 993e48354ceSNicholas Bellinger } 994e48354ceSNicholas Bellinger 995e48354ceSNicholas Bellinger static void iscsit_handle_nopin_timeout(unsigned long data) 996e48354ceSNicholas Bellinger { 997e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 998e48354ceSNicholas Bellinger 999e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1000e48354ceSNicholas Bellinger 1001e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1002e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1003e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1004e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1005e48354ceSNicholas Bellinger return; 1006e48354ceSNicholas Bellinger } 1007e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1008e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1009e48354ceSNicholas Bellinger 1010e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1011e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1012e48354ceSNicholas Bellinger } 1013e48354ceSNicholas Bellinger 1014e48354ceSNicholas Bellinger /* 1015e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1016e48354ceSNicholas Bellinger */ 1017e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1018e48354ceSNicholas Bellinger { 1019e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1020e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1021e48354ceSNicholas Bellinger /* 1022e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1023e48354ceSNicholas Bellinger */ 1024e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1025e48354ceSNicholas Bellinger return; 1026e48354ceSNicholas Bellinger 1027e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1028e48354ceSNicholas Bellinger return; 1029e48354ceSNicholas Bellinger 1030e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1031e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1032e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1033e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1034e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1035e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1036e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1037e48354ceSNicholas Bellinger 1038e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1039e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1040e48354ceSNicholas Bellinger } 1041e48354ceSNicholas Bellinger 1042e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1043e48354ceSNicholas Bellinger { 1044e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1045e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1046e48354ceSNicholas Bellinger /* 1047e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1048e48354ceSNicholas Bellinger */ 1049e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1050e48354ceSNicholas Bellinger return; 1051e48354ceSNicholas Bellinger 1052e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1053e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1054e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1055e48354ceSNicholas Bellinger return; 1056e48354ceSNicholas Bellinger } 1057e48354ceSNicholas Bellinger 1058e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1059e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1060e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1061e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1062e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1063e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1064e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1065e48354ceSNicholas Bellinger 1066e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1067e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1068e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1069e48354ceSNicholas Bellinger } 1070e48354ceSNicholas Bellinger 1071e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1072e48354ceSNicholas Bellinger { 1073e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1074e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1075e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1076e48354ceSNicholas Bellinger return; 1077e48354ceSNicholas Bellinger } 1078e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1079e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1080e48354ceSNicholas Bellinger 1081e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1082e48354ceSNicholas Bellinger 1083e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1084e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1085e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1086e48354ceSNicholas Bellinger } 1087e48354ceSNicholas Bellinger 1088e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1089e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1090e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1091e48354ceSNicholas Bellinger int use_misc) 1092e48354ceSNicholas Bellinger { 1093e48354ceSNicholas Bellinger int tx_sent, tx_size; 1094e48354ceSNicholas Bellinger u32 iov_count; 1095e48354ceSNicholas Bellinger struct kvec *iov; 1096e48354ceSNicholas Bellinger 1097e48354ceSNicholas Bellinger send_data: 1098e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1099e48354ceSNicholas Bellinger 1100e48354ceSNicholas Bellinger if (!use_misc) { 1101e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1102e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1103e48354ceSNicholas Bellinger } else { 1104e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1105e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1106e48354ceSNicholas Bellinger } 1107e48354ceSNicholas Bellinger 1108e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1109e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1110e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1111e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1112e48354ceSNicholas Bellinger goto send_data; 1113e48354ceSNicholas Bellinger } else 1114e48354ceSNicholas Bellinger return -1; 1115e48354ceSNicholas Bellinger } 1116e48354ceSNicholas Bellinger cmd->tx_size = 0; 1117e48354ceSNicholas Bellinger 1118e48354ceSNicholas Bellinger return 0; 1119e48354ceSNicholas Bellinger } 1120e48354ceSNicholas Bellinger 1121e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1122e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1123e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1124e48354ceSNicholas Bellinger { 1125e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1126e48354ceSNicholas Bellinger struct kvec iov; 1127e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1128e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 112940b05497SNicholas Bellinger int tx_sent, iov_off; 1130e48354ceSNicholas Bellinger 1131e48354ceSNicholas Bellinger send_hdr: 1132e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1133e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1134e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1135e48354ceSNicholas Bellinger 1136e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1137e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1138e48354ceSNicholas Bellinger 1139e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1140e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1141e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1142e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1143e48354ceSNicholas Bellinger goto send_hdr; 1144e48354ceSNicholas Bellinger } 1145e48354ceSNicholas Bellinger return -1; 1146e48354ceSNicholas Bellinger } 1147e48354ceSNicholas Bellinger 1148e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 114940b05497SNicholas Bellinger /* 115040b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 115140b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 115240b05497SNicholas Bellinger */ 115340b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1154e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 115540b05497SNicholas Bellinger if (cmd->padding) 115640b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 115740b05497SNicholas Bellinger else 115840b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 115940b05497SNicholas Bellinger } else { 116040b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 116140b05497SNicholas Bellinger } 1162e48354ceSNicholas Bellinger /* 1163e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1164e48354ceSNicholas Bellinger */ 1165e48354ceSNicholas Bellinger while (data_len) { 1166e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1167e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1168e48354ceSNicholas Bellinger send_pg: 1169e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1170e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1171e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1172e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1173e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1174e48354ceSNicholas Bellinger " -EAGAIN\n"); 1175e48354ceSNicholas Bellinger goto send_pg; 1176e48354ceSNicholas Bellinger } 1177e48354ceSNicholas Bellinger 1178e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1179e48354ceSNicholas Bellinger tx_sent); 1180e48354ceSNicholas Bellinger return -1; 1181e48354ceSNicholas Bellinger } 1182e48354ceSNicholas Bellinger 1183e48354ceSNicholas Bellinger data_len -= sub_len; 1184e48354ceSNicholas Bellinger offset = 0; 1185e48354ceSNicholas Bellinger sg = sg_next(sg); 1186e48354ceSNicholas Bellinger } 1187e48354ceSNicholas Bellinger 1188e48354ceSNicholas Bellinger send_padding: 1189e48354ceSNicholas Bellinger if (cmd->padding) { 119040b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1191e48354ceSNicholas Bellinger 1192e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1193e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1194e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1195e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1196e48354ceSNicholas Bellinger goto send_padding; 1197e48354ceSNicholas Bellinger } 1198e48354ceSNicholas Bellinger return -1; 1199e48354ceSNicholas Bellinger } 1200e48354ceSNicholas Bellinger } 1201e48354ceSNicholas Bellinger 1202e48354ceSNicholas Bellinger send_datacrc: 1203e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 120440b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1205e48354ceSNicholas Bellinger 1206e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1207e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1208e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1209e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1210e48354ceSNicholas Bellinger goto send_datacrc; 1211e48354ceSNicholas Bellinger } 1212e48354ceSNicholas Bellinger return -1; 1213e48354ceSNicholas Bellinger } 1214e48354ceSNicholas Bellinger } 1215e48354ceSNicholas Bellinger 1216e48354ceSNicholas Bellinger return 0; 1217e48354ceSNicholas Bellinger } 1218e48354ceSNicholas Bellinger 1219e48354ceSNicholas Bellinger /* 1220e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1221e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1222e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1223e48354ceSNicholas Bellinger * 1224e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1225e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1226e48354ceSNicholas Bellinger */ 1227e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1228e48354ceSNicholas Bellinger { 1229e48354ceSNicholas Bellinger u8 iscsi_hdr[ISCSI_HDR_LEN]; 1230e48354ceSNicholas Bellinger int err; 1231e48354ceSNicholas Bellinger struct kvec iov; 1232e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1233e48354ceSNicholas Bellinger 1234e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1235e48354ceSNicholas Bellinger 1236e48354ceSNicholas Bellinger memset(&iov, 0, sizeof(struct kvec)); 1237e48354ceSNicholas Bellinger memset(&iscsi_hdr, 0x0, ISCSI_HDR_LEN); 1238e48354ceSNicholas Bellinger 1239e48354ceSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&iscsi_hdr; 1240e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1241e48354ceSNicholas Bellinger hdr->status_class = status_class; 1242e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 124366c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1244e48354ceSNicholas Bellinger 1245e48354ceSNicholas Bellinger iov.iov_base = &iscsi_hdr; 1246e48354ceSNicholas Bellinger iov.iov_len = ISCSI_HDR_LEN; 1247e48354ceSNicholas Bellinger 1248e48354ceSNicholas Bellinger PRINT_BUFF(iscsi_hdr, ISCSI_HDR_LEN); 1249e48354ceSNicholas Bellinger 1250e48354ceSNicholas Bellinger err = tx_data(conn, &iov, 1, ISCSI_HDR_LEN); 1251e48354ceSNicholas Bellinger if (err != ISCSI_HDR_LEN) { 1252e48354ceSNicholas Bellinger pr_err("tx_data returned less than expected\n"); 1253e48354ceSNicholas Bellinger return -1; 1254e48354ceSNicholas Bellinger } 1255e48354ceSNicholas Bellinger 1256e48354ceSNicholas Bellinger return 0; 1257e48354ceSNicholas Bellinger } 1258e48354ceSNicholas Bellinger 1259e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1260e48354ceSNicholas Bellinger { 1261e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1262e48354ceSNicholas Bellinger 1263e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1264e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1265e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1266e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1267e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1268e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1269e48354ceSNicholas Bellinger 1270e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1271e48354ceSNicholas Bellinger } 1272e48354ceSNicholas Bellinger 1273e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1274e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1275e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1276e48354ceSNicholas Bellinger { 1277e48354ceSNicholas Bellinger int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; 12782ff017f5SNicholas Bellinger struct kvec *iov_p; 1279e48354ceSNicholas Bellinger struct msghdr msg; 1280e48354ceSNicholas Bellinger 1281e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1282e48354ceSNicholas Bellinger return -1; 1283e48354ceSNicholas Bellinger 1284e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1285e48354ceSNicholas Bellinger 1286e48354ceSNicholas Bellinger iov_p = count->iov; 1287e48354ceSNicholas Bellinger iov_len = count->iov_count; 1288e48354ceSNicholas Bellinger 1289e48354ceSNicholas Bellinger while (total_rx < data) { 1290e48354ceSNicholas Bellinger rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, 1291e48354ceSNicholas Bellinger (data - total_rx), MSG_WAITALL); 1292e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1293e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1294e48354ceSNicholas Bellinger rx_loop, total_rx); 1295e48354ceSNicholas Bellinger return rx_loop; 1296e48354ceSNicholas Bellinger } 1297e48354ceSNicholas Bellinger total_rx += rx_loop; 1298e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1299e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1300e48354ceSNicholas Bellinger } 1301e48354ceSNicholas Bellinger 1302e48354ceSNicholas Bellinger return total_rx; 1303e48354ceSNicholas Bellinger } 1304e48354ceSNicholas Bellinger 1305e48354ceSNicholas Bellinger static int iscsit_do_tx_data( 1306e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1307e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1308e48354ceSNicholas Bellinger { 1309e48354ceSNicholas Bellinger int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; 13102ff017f5SNicholas Bellinger struct kvec *iov_p; 1311e48354ceSNicholas Bellinger struct msghdr msg; 1312e48354ceSNicholas Bellinger 1313e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1314e48354ceSNicholas Bellinger return -1; 1315e48354ceSNicholas Bellinger 1316e48354ceSNicholas Bellinger if (data <= 0) { 1317e48354ceSNicholas Bellinger pr_err("Data length is: %d\n", data); 1318e48354ceSNicholas Bellinger return -1; 1319e48354ceSNicholas Bellinger } 1320e48354ceSNicholas Bellinger 1321e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1322e48354ceSNicholas Bellinger 1323e48354ceSNicholas Bellinger iov_p = count->iov; 1324e48354ceSNicholas Bellinger iov_len = count->iov_count; 1325e48354ceSNicholas Bellinger 1326e48354ceSNicholas Bellinger while (total_tx < data) { 1327e48354ceSNicholas Bellinger tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, 1328e48354ceSNicholas Bellinger (data - total_tx)); 1329e48354ceSNicholas Bellinger if (tx_loop <= 0) { 1330e48354ceSNicholas Bellinger pr_debug("tx_loop: %d total_tx %d\n", 1331e48354ceSNicholas Bellinger tx_loop, total_tx); 1332e48354ceSNicholas Bellinger return tx_loop; 1333e48354ceSNicholas Bellinger } 1334e48354ceSNicholas Bellinger total_tx += tx_loop; 1335e48354ceSNicholas Bellinger pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1336e48354ceSNicholas Bellinger tx_loop, total_tx, data); 1337e48354ceSNicholas Bellinger } 1338e48354ceSNicholas Bellinger 1339e48354ceSNicholas Bellinger return total_tx; 1340e48354ceSNicholas Bellinger } 1341e48354ceSNicholas Bellinger 1342e48354ceSNicholas Bellinger int rx_data( 1343e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1344e48354ceSNicholas Bellinger struct kvec *iov, 1345e48354ceSNicholas Bellinger int iov_count, 1346e48354ceSNicholas Bellinger int data) 1347e48354ceSNicholas Bellinger { 1348e48354ceSNicholas Bellinger struct iscsi_data_count c; 1349e48354ceSNicholas Bellinger 1350e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1351e48354ceSNicholas Bellinger return -1; 1352e48354ceSNicholas Bellinger 1353e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1354e48354ceSNicholas Bellinger c.iov = iov; 1355e48354ceSNicholas Bellinger c.iov_count = iov_count; 1356e48354ceSNicholas Bellinger c.data_length = data; 1357e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1358e48354ceSNicholas Bellinger 1359e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1360e48354ceSNicholas Bellinger } 1361e48354ceSNicholas Bellinger 1362e48354ceSNicholas Bellinger int tx_data( 1363e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1364e48354ceSNicholas Bellinger struct kvec *iov, 1365e48354ceSNicholas Bellinger int iov_count, 1366e48354ceSNicholas Bellinger int data) 1367e48354ceSNicholas Bellinger { 1368e48354ceSNicholas Bellinger struct iscsi_data_count c; 1369e48354ceSNicholas Bellinger 1370e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1371e48354ceSNicholas Bellinger return -1; 1372e48354ceSNicholas Bellinger 1373e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1374e48354ceSNicholas Bellinger c.iov = iov; 1375e48354ceSNicholas Bellinger c.iov_count = iov_count; 1376e48354ceSNicholas Bellinger c.data_length = data; 1377e48354ceSNicholas Bellinger c.type = ISCSI_TX_DATA; 1378e48354ceSNicholas Bellinger 1379e48354ceSNicholas Bellinger return iscsit_do_tx_data(conn, &c); 1380e48354ceSNicholas Bellinger } 1381e48354ceSNicholas Bellinger 1382e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1383e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1384e48354ceSNicholas Bellinger u8 status_class, 1385e48354ceSNicholas Bellinger u8 status_detail) 1386e48354ceSNicholas Bellinger { 1387e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1388e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1389e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1390e48354ceSNicholas Bellinger 1391e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1392e48354ceSNicholas Bellinger if (!tiqn) 1393e48354ceSNicholas Bellinger return; 1394e48354ceSNicholas Bellinger 1395e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1396e48354ceSNicholas Bellinger 1397e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1398e48354ceSNicholas Bellinger if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && 1399e48354ceSNicholas Bellinger ((get_jiffies_64() - ls->last_fail_time) < 10)) { 1400e48354ceSNicholas Bellinger /* We already have the failure info for this login */ 1401e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1402e48354ceSNicholas Bellinger return; 1403e48354ceSNicholas Bellinger } 1404e48354ceSNicholas Bellinger 1405e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1406e48354ceSNicholas Bellinger ls->accepts++; 1407e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1408e48354ceSNicholas Bellinger ls->redirects++; 1409e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1410e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1411e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1412e48354ceSNicholas Bellinger ls->authenticate_fails++; 1413e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1414e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1415e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1416e48354ceSNicholas Bellinger ls->authorize_fails++; 1417e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1418e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1419e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1420e48354ceSNicholas Bellinger ls->negotiate_fails++; 1421e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1422e48354ceSNicholas Bellinger } else { 1423e48354ceSNicholas Bellinger ls->other_fails++; 1424e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1425e48354ceSNicholas Bellinger } 1426e48354ceSNicholas Bellinger 1427e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1428e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1429e48354ceSNicholas Bellinger if (conn->param_list) 1430e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1431e48354ceSNicholas Bellinger conn->param_list); 1432e48354ceSNicholas Bellinger strcpy(ls->last_intr_fail_name, 1433e48354ceSNicholas Bellinger (intrname ? intrname->value : "Unknown")); 1434e48354ceSNicholas Bellinger 1435e48354ceSNicholas Bellinger ls->last_intr_fail_ip_family = conn->sock->sk->sk_family; 1436e48354ceSNicholas Bellinger snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, 1437e48354ceSNicholas Bellinger "%s", conn->login_ip); 1438e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1439e48354ceSNicholas Bellinger } 1440e48354ceSNicholas Bellinger 1441e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1442e48354ceSNicholas Bellinger } 1443e48354ceSNicholas Bellinger 1444e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1445e48354ceSNicholas Bellinger { 1446e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1447e48354ceSNicholas Bellinger 1448e48354ceSNicholas Bellinger if (!conn || !conn->sess) 1449e48354ceSNicholas Bellinger return NULL; 1450e48354ceSNicholas Bellinger 1451e48354ceSNicholas Bellinger tpg = conn->sess->tpg; 1452e48354ceSNicholas Bellinger if (!tpg) 1453e48354ceSNicholas Bellinger return NULL; 1454e48354ceSNicholas Bellinger 1455e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1456e48354ceSNicholas Bellinger return NULL; 1457e48354ceSNicholas Bellinger 1458e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1459e48354ceSNicholas Bellinger } 1460