1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the iSCSI Target specific utility functions. 3e48354ceSNicholas Bellinger * 44c76251eSNicholas Bellinger * (c) Copyright 2007-2013 Datera, Inc. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 9e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 10e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 11e48354ceSNicholas Bellinger * (at your option) any later version. 12e48354ceSNicholas Bellinger * 13e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 14e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 15e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16e48354ceSNicholas Bellinger * GNU General Public License for more details. 17e48354ceSNicholas Bellinger ******************************************************************************/ 18e48354ceSNicholas Bellinger 19e48354ceSNicholas Bellinger #include <linux/list.h> 20988e3a85SNicholas Bellinger #include <linux/percpu_ida.h> 218dcf07beSBart Van Assche #include <net/ipv6.h> /* ipv6_addr_equal() */ 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> 26baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 27e48354ceSNicholas Bellinger 2867f091f2SSagi Grimberg #include <target/iscsi/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_util.h" 37e48354ceSNicholas Bellinger #include "iscsi_target.h" 38e48354ceSNicholas Bellinger 39e48354ceSNicholas Bellinger #define PRINT_BUFF(buff, len) \ 40e48354ceSNicholas Bellinger { \ 41e48354ceSNicholas Bellinger int zzz; \ 42e48354ceSNicholas Bellinger \ 43e48354ceSNicholas Bellinger pr_debug("%d:\n", __LINE__); \ 44e48354ceSNicholas Bellinger for (zzz = 0; zzz < len; zzz++) { \ 45e48354ceSNicholas Bellinger if (zzz % 16 == 0) { \ 46e48354ceSNicholas Bellinger if (zzz) \ 47e48354ceSNicholas Bellinger pr_debug("\n"); \ 48e48354ceSNicholas Bellinger pr_debug("%4i: ", zzz); \ 49e48354ceSNicholas Bellinger } \ 50e48354ceSNicholas Bellinger pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 51e48354ceSNicholas Bellinger } \ 52e48354ceSNicholas Bellinger if ((len + 1) % 16) \ 53e48354ceSNicholas Bellinger pr_debug("\n"); \ 54e48354ceSNicholas Bellinger } 55e48354ceSNicholas Bellinger 56e48354ceSNicholas Bellinger extern struct list_head g_tiqn_list; 57e48354ceSNicholas Bellinger extern spinlock_t tiqn_lock; 58e48354ceSNicholas Bellinger 59e48354ceSNicholas Bellinger /* 60e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 61e48354ceSNicholas Bellinger */ 62e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 63e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 64e48354ceSNicholas Bellinger u32 offset, 65e48354ceSNicholas Bellinger u32 xfer_len, 66e48354ceSNicholas Bellinger int recovery, 67e48354ceSNicholas Bellinger u32 r2t_sn) 68e48354ceSNicholas Bellinger { 69e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 70e48354ceSNicholas Bellinger 71e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 72e48354ceSNicholas Bellinger if (!r2t) { 73e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 74e48354ceSNicholas Bellinger return -1; 75e48354ceSNicholas Bellinger } 76e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 77e48354ceSNicholas Bellinger 78e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 79e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 80e48354ceSNicholas Bellinger r2t->offset = offset; 81e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 82e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 83e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 84e48354ceSNicholas Bellinger 85e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 86e48354ceSNicholas Bellinger 87e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 88e48354ceSNicholas Bellinger return 0; 89e48354ceSNicholas Bellinger } 90e48354ceSNicholas Bellinger 91e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 92e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 93e48354ceSNicholas Bellinger u32 offset, 94e48354ceSNicholas Bellinger u32 length) 95e48354ceSNicholas Bellinger { 96e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 97e48354ceSNicholas Bellinger 98e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 99e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 100e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 101e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 102e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 103e48354ceSNicholas Bellinger return r2t; 104e48354ceSNicholas Bellinger } 105e48354ceSNicholas Bellinger } 106e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 107e48354ceSNicholas Bellinger 108e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 109e48354ceSNicholas Bellinger " %u\n", offset, length); 110e48354ceSNicholas Bellinger return NULL; 111e48354ceSNicholas Bellinger } 112e48354ceSNicholas Bellinger 113e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 114e48354ceSNicholas Bellinger { 115e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 116e48354ceSNicholas Bellinger 117e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 118e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 119e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 120e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 121e48354ceSNicholas Bellinger return r2t; 122e48354ceSNicholas Bellinger } 123e48354ceSNicholas Bellinger } 124e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 125e48354ceSNicholas Bellinger 126e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 127e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 128e48354ceSNicholas Bellinger return NULL; 129e48354ceSNicholas Bellinger } 130e48354ceSNicholas Bellinger 131e48354ceSNicholas Bellinger /* 132e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 133e48354ceSNicholas Bellinger */ 134e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 135e48354ceSNicholas Bellinger { 136e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 137e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 138e48354ceSNicholas Bellinger } 139e48354ceSNicholas Bellinger 140e48354ceSNicholas Bellinger void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 141e48354ceSNicholas Bellinger { 142e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 143e48354ceSNicholas Bellinger 144e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 145e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 146e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 147e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 148e48354ceSNicholas Bellinger } 149e48354ceSNicholas Bellinger 150e48354ceSNicholas Bellinger /* 151e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 152e48354ceSNicholas Bellinger * iSCSI NopINs. 153e48354ceSNicholas Bellinger */ 154676687c6SNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) 155e48354ceSNicholas Bellinger { 156e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 157988e3a85SNicholas Bellinger struct se_session *se_sess = conn->sess->se_sess; 158676687c6SNicholas Bellinger int size, tag; 159e48354ceSNicholas Bellinger 1606f6b5d1eSKent Overstreet tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state); 1616f6b5d1eSKent Overstreet if (tag < 0) 1626f6b5d1eSKent Overstreet return NULL; 1636f6b5d1eSKent Overstreet 164988e3a85SNicholas Bellinger size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; 165988e3a85SNicholas Bellinger cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); 166988e3a85SNicholas Bellinger memset(cmd, 0, size); 167988e3a85SNicholas Bellinger 168988e3a85SNicholas Bellinger cmd->se_cmd.map_tag = tag; 169e48354ceSNicholas Bellinger cmd->conn = conn; 1704412a671SBart Van Assche cmd->data_direction = DMA_NONE; 1712fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 172e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 173e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 174e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 175e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 176e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 177e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 178e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 1798a47aa9dSBart Van Assche setup_timer(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 1808a47aa9dSBart Van Assche (unsigned long)cmd); 181e48354ceSNicholas Bellinger 182e48354ceSNicholas Bellinger return cmd; 183e48354ceSNicholas Bellinger } 184cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 185e48354ceSNicholas Bellinger 186e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 187e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 188e48354ceSNicholas Bellinger u32 seq_send_order) 189e48354ceSNicholas Bellinger { 190e48354ceSNicholas Bellinger u32 i; 191e48354ceSNicholas Bellinger 192e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 193e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 194e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 195e48354ceSNicholas Bellinger 196e48354ceSNicholas Bellinger return NULL; 197e48354ceSNicholas Bellinger } 198e48354ceSNicholas Bellinger 199e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 200e48354ceSNicholas Bellinger { 201e48354ceSNicholas Bellinger u32 i; 202e48354ceSNicholas Bellinger 203e48354ceSNicholas Bellinger if (!cmd->seq_list) { 204e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 205e48354ceSNicholas Bellinger return NULL; 206e48354ceSNicholas Bellinger } 207e48354ceSNicholas Bellinger 208e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 209e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 210e48354ceSNicholas Bellinger continue; 211e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 212e48354ceSNicholas Bellinger cmd->seq_send_order++; 213e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 214e48354ceSNicholas Bellinger } 215e48354ceSNicholas Bellinger } 216e48354ceSNicholas Bellinger 217e48354ceSNicholas Bellinger return NULL; 218e48354ceSNicholas Bellinger } 219e48354ceSNicholas Bellinger 220e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 221e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 222e48354ceSNicholas Bellinger u32 r2t_sn) 223e48354ceSNicholas Bellinger { 224e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 225e48354ceSNicholas Bellinger 226e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 227e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 228e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 229e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 230e48354ceSNicholas Bellinger return r2t; 231e48354ceSNicholas Bellinger } 232e48354ceSNicholas Bellinger } 233e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 234e48354ceSNicholas Bellinger 235e48354ceSNicholas Bellinger return NULL; 236e48354ceSNicholas Bellinger } 237e48354ceSNicholas Bellinger 238e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 239e48354ceSNicholas Bellinger { 240109e2381SRoland Dreier u32 max_cmdsn; 241e48354ceSNicholas Bellinger int ret; 242e48354ceSNicholas Bellinger 243e48354ceSNicholas Bellinger /* 244e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 245e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 246e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 247e48354ceSNicholas Bellinger * CRC failures. 248e48354ceSNicholas Bellinger */ 249109e2381SRoland Dreier max_cmdsn = atomic_read(&sess->max_cmd_sn); 250109e2381SRoland Dreier if (iscsi_sna_gt(cmdsn, max_cmdsn)) { 251e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 252109e2381SRoland Dreier " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); 253ea7e32beSNicholas Bellinger ret = CMDSN_MAXCMDSN_OVERRUN; 254e48354ceSNicholas Bellinger 255e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 256e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 257e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 258e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 259e48354ceSNicholas Bellinger sess->exp_cmd_sn); 260e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 261e48354ceSNicholas Bellinger 262e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 263e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 264e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 265e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 266e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 267e48354ceSNicholas Bellinger 268e48354ceSNicholas Bellinger } else { 269e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 270e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 271e48354ceSNicholas Bellinger sess->exp_cmd_sn); 272e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 273e48354ceSNicholas Bellinger } 274e48354ceSNicholas Bellinger 275e48354ceSNicholas Bellinger return ret; 276e48354ceSNicholas Bellinger } 277e48354ceSNicholas Bellinger 278e48354ceSNicholas Bellinger /* 279e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 280e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 281e48354ceSNicholas Bellinger */ 282561bf158SNicholas Bellinger int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 283561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 284e48354ceSNicholas Bellinger { 285561bf158SNicholas Bellinger int ret, cmdsn_ret; 286561bf158SNicholas Bellinger bool reject = false; 287561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 288e48354ceSNicholas Bellinger 289e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 290e48354ceSNicholas Bellinger 29150e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 292e48354ceSNicholas Bellinger switch (cmdsn_ret) { 293e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 294e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 295e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 296e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 297561bf158SNicholas Bellinger else if (ret < 0) { 298561bf158SNicholas Bellinger reject = true; 299561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 300561bf158SNicholas Bellinger } 301e48354ceSNicholas Bellinger break; 302e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 30350e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 304561bf158SNicholas Bellinger if (ret < 0) { 305561bf158SNicholas Bellinger reject = true; 306561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 307561bf158SNicholas Bellinger break; 308561bf158SNicholas Bellinger } 309561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 310e48354ceSNicholas Bellinger break; 311e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 312ea7e32beSNicholas Bellinger case CMDSN_MAXCMDSN_OVERRUN: 313ea7e32beSNicholas Bellinger default: 314e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 315e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 316ea7e32beSNicholas Bellinger /* 317ea7e32beSNicholas Bellinger * Existing callers for iscsit_sequence_cmd() will silently 318ea7e32beSNicholas Bellinger * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 319ea7e32beSNicholas Bellinger * return for CMDSN_MAXCMDSN_OVERRUN as well.. 320ea7e32beSNicholas Bellinger */ 321ea7e32beSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 322e48354ceSNicholas Bellinger break; 323e48354ceSNicholas Bellinger } 324e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 325e48354ceSNicholas Bellinger 326561bf158SNicholas Bellinger if (reject) 327561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 328561bf158SNicholas Bellinger 329e48354ceSNicholas Bellinger return ret; 330e48354ceSNicholas Bellinger } 3313e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 332e48354ceSNicholas Bellinger 333e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 334e48354ceSNicholas Bellinger { 335e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 336e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 337e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 338e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 339e48354ceSNicholas Bellinger 340e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 341e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 342e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 343e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 344e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 345e48354ceSNicholas Bellinger return -1; 346e48354ceSNicholas Bellinger } 347e48354ceSNicholas Bellinger 348e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 349e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 350e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 351e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 352e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 353e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 354e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 355e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 356e48354ceSNicholas Bellinger return -1; 357e48354ceSNicholas Bellinger } 358e48354ceSNicholas Bellinger 359e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 360e48354ceSNicholas Bellinger return 0; 361e48354ceSNicholas Bellinger 362ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 363e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 364e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 365e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 366e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 367e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 368e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 369ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 370e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 371e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 372e48354ceSNicholas Bellinger return -1; 373e48354ceSNicholas Bellinger } 374e48354ceSNicholas Bellinger return 0; 375e48354ceSNicholas Bellinger } 376e48354ceSNicholas Bellinger 377e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 378e48354ceSNicholas Bellinger struct iscsi_conn *conn, 37966c7db68SChristoph Hellwig itt_t init_task_tag) 380e48354ceSNicholas Bellinger { 381e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 382e48354ceSNicholas Bellinger 383e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3842fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 385e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 386e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 387e48354ceSNicholas Bellinger return cmd; 388e48354ceSNicholas Bellinger } 389e48354ceSNicholas Bellinger } 390e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 391e48354ceSNicholas Bellinger 392e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 393e48354ceSNicholas Bellinger init_task_tag, conn->cid); 394e48354ceSNicholas Bellinger return NULL; 395e48354ceSNicholas Bellinger } 396e4f4e801SSagi Grimberg EXPORT_SYMBOL(iscsit_find_cmd_from_itt); 397e48354ceSNicholas Bellinger 398e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 399e48354ceSNicholas Bellinger struct iscsi_conn *conn, 40066c7db68SChristoph Hellwig itt_t init_task_tag, 401e48354ceSNicholas Bellinger u32 length) 402e48354ceSNicholas Bellinger { 403e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 404e48354ceSNicholas Bellinger 405e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4062fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 4073687db88SNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 4083687db88SNicholas Bellinger continue; 409e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 410e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 411e48354ceSNicholas Bellinger return cmd; 412e48354ceSNicholas Bellinger } 413e48354ceSNicholas Bellinger } 414e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 415e48354ceSNicholas Bellinger 416e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 417e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 418e48354ceSNicholas Bellinger if (length) 419e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 420e48354ceSNicholas Bellinger 421e48354ceSNicholas Bellinger return NULL; 422e48354ceSNicholas Bellinger } 4239a584bf9SVarun Prakash EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); 424e48354ceSNicholas Bellinger 425e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 426e48354ceSNicholas Bellinger struct iscsi_conn *conn, 427e48354ceSNicholas Bellinger u32 targ_xfer_tag) 428e48354ceSNicholas Bellinger { 429e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 430e48354ceSNicholas Bellinger 431e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4322fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 433e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 434e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 435e48354ceSNicholas Bellinger return cmd; 436e48354ceSNicholas Bellinger } 437e48354ceSNicholas Bellinger } 438e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 439e48354ceSNicholas Bellinger 440e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 441e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 442e48354ceSNicholas Bellinger return NULL; 443e48354ceSNicholas Bellinger } 444e48354ceSNicholas Bellinger 445e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 446e48354ceSNicholas Bellinger struct iscsi_session *sess, 447e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 448e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 44966c7db68SChristoph Hellwig itt_t init_task_tag) 450e48354ceSNicholas Bellinger { 451e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 452e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 453e48354ceSNicholas Bellinger /* 454e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 455e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 456e48354ceSNicholas Bellinger */ 457e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 458e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 459e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4602fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 461e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 462e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 463e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 464e48354ceSNicholas Bellinger 465e48354ceSNicholas Bellinger *cr_ptr = cr; 466e48354ceSNicholas Bellinger *cmd_ptr = cmd; 467e48354ceSNicholas Bellinger return -2; 468e48354ceSNicholas Bellinger } 469e48354ceSNicholas Bellinger } 470e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 471e48354ceSNicholas Bellinger } 472e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 473e48354ceSNicholas Bellinger /* 474e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 475e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 476e48354ceSNicholas Bellinger */ 477e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 478e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 479e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4802fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 481e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 482e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 483e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 484e48354ceSNicholas Bellinger 485e48354ceSNicholas Bellinger *cr_ptr = cr; 486e48354ceSNicholas Bellinger *cmd_ptr = cmd; 487e48354ceSNicholas Bellinger return 0; 488e48354ceSNicholas Bellinger } 489e48354ceSNicholas Bellinger } 490e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 491e48354ceSNicholas Bellinger } 492e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 493e48354ceSNicholas Bellinger 494e48354ceSNicholas Bellinger return -1; 495e48354ceSNicholas Bellinger } 496e48354ceSNicholas Bellinger 497e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 498e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 499e48354ceSNicholas Bellinger struct iscsi_conn *conn, 500e48354ceSNicholas Bellinger u8 state) 501e48354ceSNicholas Bellinger { 502e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 503e48354ceSNicholas Bellinger 504e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 505e48354ceSNicholas Bellinger if (!qr) { 506e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 507e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 508e48354ceSNicholas Bellinger return; 509e48354ceSNicholas Bellinger } 510e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 511e48354ceSNicholas Bellinger qr->cmd = cmd; 512e48354ceSNicholas Bellinger qr->state = state; 513e48354ceSNicholas Bellinger 514e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 515e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 516e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 517e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 518e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 519e48354ceSNicholas Bellinger 520d5627acbSRoland Dreier wake_up(&conn->queues_wq); 521e48354ceSNicholas Bellinger } 522d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); 523e48354ceSNicholas Bellinger 524e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 525e48354ceSNicholas Bellinger { 526e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 527e48354ceSNicholas Bellinger 528e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 529e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 530e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 531e48354ceSNicholas Bellinger return NULL; 532e48354ceSNicholas Bellinger } 5331f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5341f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 535e48354ceSNicholas Bellinger 536e48354ceSNicholas Bellinger list_del(&qr->qr_list); 537e48354ceSNicholas Bellinger if (qr->cmd) 538e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 539e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 540e48354ceSNicholas Bellinger 541e48354ceSNicholas Bellinger return qr; 542e48354ceSNicholas Bellinger } 543e48354ceSNicholas Bellinger 544e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 545e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 546e48354ceSNicholas Bellinger struct iscsi_conn *conn) 547e48354ceSNicholas Bellinger { 548e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 549e48354ceSNicholas Bellinger 550e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 551e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 552e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 553e48354ceSNicholas Bellinger return; 554e48354ceSNicholas Bellinger } 555e48354ceSNicholas Bellinger 556e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 557e48354ceSNicholas Bellinger if (qr->cmd != cmd) 558e48354ceSNicholas Bellinger continue; 559e48354ceSNicholas Bellinger 560e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 561e48354ceSNicholas Bellinger list_del(&qr->qr_list); 562e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 563e48354ceSNicholas Bellinger } 564e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 565e48354ceSNicholas Bellinger 566e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 567e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 568e48354ceSNicholas Bellinger cmd->init_task_tag, 569e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 570e48354ceSNicholas Bellinger } 571e48354ceSNicholas Bellinger } 572e48354ceSNicholas Bellinger 573a4467018SNicholas Bellinger int iscsit_add_cmd_to_response_queue( 574e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 575e48354ceSNicholas Bellinger struct iscsi_conn *conn, 576e48354ceSNicholas Bellinger u8 state) 577e48354ceSNicholas Bellinger { 578e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 579e48354ceSNicholas Bellinger 580e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 581e48354ceSNicholas Bellinger if (!qr) { 582e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 583e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 584a4467018SNicholas Bellinger return -ENOMEM; 585e48354ceSNicholas Bellinger } 586e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 587e48354ceSNicholas Bellinger qr->cmd = cmd; 588e48354ceSNicholas Bellinger qr->state = state; 589e48354ceSNicholas Bellinger 590e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 591e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 592e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 593e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 594e48354ceSNicholas Bellinger 595d5627acbSRoland Dreier wake_up(&conn->queues_wq); 596a4467018SNicholas Bellinger return 0; 597e48354ceSNicholas Bellinger } 598e48354ceSNicholas Bellinger 599e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 600e48354ceSNicholas Bellinger { 601e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 602e48354ceSNicholas Bellinger 603e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 604e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 605e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 606e48354ceSNicholas Bellinger return NULL; 607e48354ceSNicholas Bellinger } 608e48354ceSNicholas Bellinger 6091f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6101f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 611e48354ceSNicholas Bellinger 612e48354ceSNicholas Bellinger list_del(&qr->qr_list); 613e48354ceSNicholas Bellinger if (qr->cmd) 614e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 615e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 616e48354ceSNicholas Bellinger 617e48354ceSNicholas Bellinger return qr; 618e48354ceSNicholas Bellinger } 619e48354ceSNicholas Bellinger 620e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 621e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 622e48354ceSNicholas Bellinger struct iscsi_conn *conn) 623e48354ceSNicholas Bellinger { 624e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 625e48354ceSNicholas Bellinger 626e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 627e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 628e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 629e48354ceSNicholas Bellinger return; 630e48354ceSNicholas Bellinger } 631e48354ceSNicholas Bellinger 632e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 633e48354ceSNicholas Bellinger qr_list) { 634e48354ceSNicholas Bellinger if (qr->cmd != cmd) 635e48354ceSNicholas Bellinger continue; 636e48354ceSNicholas Bellinger 637e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 638e48354ceSNicholas Bellinger list_del(&qr->qr_list); 639e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 640e48354ceSNicholas Bellinger } 641e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 642e48354ceSNicholas Bellinger 643e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 644e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 645e48354ceSNicholas Bellinger cmd->init_task_tag, 646e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 647e48354ceSNicholas Bellinger } 648e48354ceSNicholas Bellinger } 649e48354ceSNicholas Bellinger 650d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 651d5627acbSRoland Dreier { 652d5627acbSRoland Dreier bool empty; 653d5627acbSRoland Dreier 654d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 655d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 656d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 657d5627acbSRoland Dreier 658d5627acbSRoland Dreier if (!empty) 659d5627acbSRoland Dreier return empty; 660d5627acbSRoland Dreier 661d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 662d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 663d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 664d5627acbSRoland Dreier 665d5627acbSRoland Dreier return empty; 666d5627acbSRoland Dreier } 667d5627acbSRoland Dreier 668e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 669e48354ceSNicholas Bellinger { 670e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 671e48354ceSNicholas Bellinger 672e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 673e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 674e48354ceSNicholas Bellinger list_del(&qr->qr_list); 675e48354ceSNicholas Bellinger if (qr->cmd) 676e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 677e48354ceSNicholas Bellinger 678e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 679e48354ceSNicholas Bellinger } 680e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 681e48354ceSNicholas Bellinger 682e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 683e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 684e48354ceSNicholas Bellinger qr_list) { 685e48354ceSNicholas Bellinger list_del(&qr->qr_list); 686e48354ceSNicholas Bellinger if (qr->cmd) 687e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 688e48354ceSNicholas Bellinger 689e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 690e48354ceSNicholas Bellinger } 691e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 692e48354ceSNicholas Bellinger } 693e48354ceSNicholas Bellinger 694e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 695e48354ceSNicholas Bellinger { 696988e3a85SNicholas Bellinger struct iscsi_session *sess; 697988e3a85SNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 698988e3a85SNicholas Bellinger 699988e3a85SNicholas Bellinger if (cmd->conn) 700988e3a85SNicholas Bellinger sess = cmd->conn->sess; 701988e3a85SNicholas Bellinger else 702988e3a85SNicholas Bellinger sess = cmd->sess; 703988e3a85SNicholas Bellinger 704988e3a85SNicholas Bellinger BUG_ON(!sess || !sess->se_sess); 705988e3a85SNicholas Bellinger 706e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 707e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 708e48354ceSNicholas Bellinger kfree(cmd->seq_list); 709e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 710e48354ceSNicholas Bellinger kfree(cmd->iov_data); 7119864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 712e48354ceSNicholas Bellinger 713988e3a85SNicholas Bellinger percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); 714e48354ceSNicholas Bellinger } 715d703ce2fSNicholas Bellinger EXPORT_SYMBOL(iscsit_release_cmd); 716e48354ceSNicholas Bellinger 7174412a671SBart Van Assche void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool check_queues) 718d270190aSNicholas Bellinger { 719aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 720aafc9d15SNicholas Bellinger 721aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 722aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 723aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 724aafc9d15SNicholas Bellinger } 725aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 726aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 727aafc9d15SNicholas Bellinger 728aafc9d15SNicholas Bellinger if (conn && check_queues) { 729aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 730aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 731aafc9d15SNicholas Bellinger } 7327ec811a8SVarun Prakash 7337ec811a8SVarun Prakash if (conn && conn->conn_transport->iscsit_release_cmd) 7347ec811a8SVarun Prakash conn->conn_transport->iscsit_release_cmd(conn, cmd); 735aafc9d15SNicholas Bellinger } 736aafc9d15SNicholas Bellinger 737aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 738aafc9d15SNicholas Bellinger { 739d1c26857SBart Van Assche struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL; 740aafc9d15SNicholas Bellinger int rc; 7414412a671SBart Van Assche 7424412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 743d1c26857SBart Van Assche if (se_cmd) { 744efb2ea77SNicholas Bellinger rc = transport_generic_free_cmd(se_cmd, shutdown); 745efb2ea77SNicholas Bellinger if (!rc && shutdown && se_cmd->se_sess) { 7464412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 747afc16604SBart Van Assche target_put_sess_cmd(se_cmd); 748aafc9d15SNicholas Bellinger } 749d1c26857SBart Van Assche } else { 750d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 751d270190aSNicholas Bellinger } 752d270190aSNicholas Bellinger } 753d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_free_cmd); 754d270190aSNicholas Bellinger 755e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 756e48354ceSNicholas Bellinger { 757e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 758e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 759e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 760e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 761e48354ceSNicholas Bellinger if (in_interrupt()) 762e48354ceSNicholas Bellinger return 2; 763e48354ceSNicholas Bellinger 764e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 765e48354ceSNicholas Bellinger return 1; 766e48354ceSNicholas Bellinger } 767e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 768e48354ceSNicholas Bellinger 769e48354ceSNicholas Bellinger return 0; 770e48354ceSNicholas Bellinger } 771e48354ceSNicholas Bellinger 772e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 773e48354ceSNicholas Bellinger { 774e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 775e48354ceSNicholas Bellinger sess->session_usage_count--; 776e48354ceSNicholas Bellinger 777e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 778e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 779e48354ceSNicholas Bellinger 780e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 781e48354ceSNicholas Bellinger } 782e48354ceSNicholas Bellinger 783e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 784e48354ceSNicholas Bellinger { 785e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 786e48354ceSNicholas Bellinger sess->session_usage_count++; 787e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 788e48354ceSNicholas Bellinger } 789e48354ceSNicholas Bellinger 790e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 791e48354ceSNicholas Bellinger { 792e48354ceSNicholas Bellinger struct iscsi_conn *conn; 793e48354ceSNicholas Bellinger 794e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 795e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 796e48354ceSNicholas Bellinger if ((conn->cid == cid) && 797e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 798e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 799e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 800e48354ceSNicholas Bellinger return conn; 801e48354ceSNicholas Bellinger } 802e48354ceSNicholas Bellinger } 803e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 804e48354ceSNicholas Bellinger 805e48354ceSNicholas Bellinger return NULL; 806e48354ceSNicholas Bellinger } 807e48354ceSNicholas Bellinger 808e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 809e48354ceSNicholas Bellinger { 810e48354ceSNicholas Bellinger struct iscsi_conn *conn; 811e48354ceSNicholas Bellinger 812e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 813e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 814e48354ceSNicholas Bellinger if (conn->cid == cid) { 815e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 816e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 817e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 818e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 819e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 820e48354ceSNicholas Bellinger return conn; 821e48354ceSNicholas Bellinger } 822e48354ceSNicholas Bellinger } 823e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 824e48354ceSNicholas Bellinger 825e48354ceSNicholas Bellinger return NULL; 826e48354ceSNicholas Bellinger } 827e48354ceSNicholas Bellinger 828e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 829e48354ceSNicholas Bellinger { 830e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 831e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 832e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 833e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 834e48354ceSNicholas Bellinger 835e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 836e48354ceSNicholas Bellinger return; 837e48354ceSNicholas Bellinger } 838e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 839e48354ceSNicholas Bellinger } 840e48354ceSNicholas Bellinger 841e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 842e48354ceSNicholas Bellinger { 843e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 844e48354ceSNicholas Bellinger conn->conn_usage_count--; 845e48354ceSNicholas Bellinger 846e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 847e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 848e48354ceSNicholas Bellinger 849e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 850e48354ceSNicholas Bellinger } 851e48354ceSNicholas Bellinger 852e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 853e48354ceSNicholas Bellinger { 854e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 855e48354ceSNicholas Bellinger conn->conn_usage_count++; 856e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 857e48354ceSNicholas Bellinger } 858e48354ceSNicholas Bellinger 859e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 860e48354ceSNicholas Bellinger { 861e48354ceSNicholas Bellinger u8 state; 862e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 863e48354ceSNicholas Bellinger 864676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 865e48354ceSNicholas Bellinger if (!cmd) 866e48354ceSNicholas Bellinger return -1; 867e48354ceSNicholas Bellinger 868e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 869e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 870e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 87166c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 872c1e34b64SSagi Grimberg cmd->targ_xfer_tag = (want_response) ? 873c1e34b64SSagi Grimberg session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 874e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 8752fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 876e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 877e48354ceSNicholas Bellinger 878e48354ceSNicholas Bellinger if (want_response) 879e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 880e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 881e48354ceSNicholas Bellinger 882e48354ceSNicholas Bellinger return 0; 883e48354ceSNicholas Bellinger } 884e48354ceSNicholas Bellinger 8858a47aa9dSBart Van Assche void iscsit_handle_nopin_response_timeout(unsigned long data) 886e48354ceSNicholas Bellinger { 887e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 888e48354ceSNicholas Bellinger 889e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 890e48354ceSNicholas Bellinger 891e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 892e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 893e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 894e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 895e48354ceSNicholas Bellinger return; 896e48354ceSNicholas Bellinger } 897e48354ceSNicholas Bellinger 898e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 899e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 900e48354ceSNicholas Bellinger conn->sess->sid); 901e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 902e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 903e48354ceSNicholas Bellinger 904e48354ceSNicholas Bellinger { 905e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 906e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 907e48354ceSNicholas Bellinger 908e48354ceSNicholas Bellinger if (tiqn) { 909e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 910e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9118359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 912e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 913e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 914e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 91504f3b31bSNicholas Bellinger atomic_long_inc(&conn->sess->conn_timeout_errors); 916e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 917e48354ceSNicholas Bellinger } 918e48354ceSNicholas Bellinger } 919e48354ceSNicholas Bellinger 920e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 921e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 922e48354ceSNicholas Bellinger } 923e48354ceSNicholas Bellinger 924e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 925e48354ceSNicholas Bellinger { 926e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 927e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 928e48354ceSNicholas Bellinger 929e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 930e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 931e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 932e48354ceSNicholas Bellinger return; 933e48354ceSNicholas Bellinger } 934e48354ceSNicholas Bellinger 935e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 936e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 937e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 938e48354ceSNicholas Bellinger } 939e48354ceSNicholas Bellinger 940e48354ceSNicholas Bellinger /* 941e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 942e48354ceSNicholas Bellinger */ 943e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 944e48354ceSNicholas Bellinger { 945e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 946e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 947e48354ceSNicholas Bellinger 948e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 949e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 950e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 951e48354ceSNicholas Bellinger return; 952e48354ceSNicholas Bellinger } 953e48354ceSNicholas Bellinger 954e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 955e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 9568a47aa9dSBart Van Assche mod_timer(&conn->nopin_response_timer, 9578a47aa9dSBart Van Assche jiffies + na->nopin_response_timeout * HZ); 958e48354ceSNicholas Bellinger 959e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 960e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 961e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 962e48354ceSNicholas Bellinger } 963e48354ceSNicholas Bellinger 964e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 965e48354ceSNicholas Bellinger { 966e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 967e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 968e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 969e48354ceSNicholas Bellinger return; 970e48354ceSNicholas Bellinger } 971e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 972e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 973e48354ceSNicholas Bellinger 974e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 975e48354ceSNicholas Bellinger 976e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 977e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 978e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 979e48354ceSNicholas Bellinger } 980e48354ceSNicholas Bellinger 9818a47aa9dSBart Van Assche void iscsit_handle_nopin_timeout(unsigned long data) 982e48354ceSNicholas Bellinger { 983e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 984e48354ceSNicholas Bellinger 985e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 986e48354ceSNicholas Bellinger 987e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 988e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 989e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 990e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 991e48354ceSNicholas Bellinger return; 992e48354ceSNicholas Bellinger } 993e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 994e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 995e48354ceSNicholas Bellinger 996e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 997e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 998e48354ceSNicholas Bellinger } 999e48354ceSNicholas Bellinger 1000e48354ceSNicholas Bellinger /* 1001e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1002e48354ceSNicholas Bellinger */ 1003e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1004e48354ceSNicholas Bellinger { 1005e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1006e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1007e48354ceSNicholas Bellinger /* 1008e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1009e48354ceSNicholas Bellinger */ 1010e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1011e48354ceSNicholas Bellinger return; 1012e48354ceSNicholas Bellinger 1013e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1014e48354ceSNicholas Bellinger return; 1015e48354ceSNicholas Bellinger 1016e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1017e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 10188a47aa9dSBart Van Assche mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 1019e48354ceSNicholas Bellinger 1020e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1021e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1022e48354ceSNicholas Bellinger } 1023e48354ceSNicholas Bellinger 1024e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1025e48354ceSNicholas Bellinger { 1026e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1027e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1028e48354ceSNicholas Bellinger /* 1029e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1030e48354ceSNicholas Bellinger */ 1031e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1032e48354ceSNicholas Bellinger return; 1033e48354ceSNicholas Bellinger 1034e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1035e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1036e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1037e48354ceSNicholas Bellinger return; 1038e48354ceSNicholas Bellinger } 1039e48354ceSNicholas Bellinger 1040e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1041e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 10428a47aa9dSBart Van Assche mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 1043e48354ceSNicholas Bellinger 1044e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1045e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1046e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1047e48354ceSNicholas Bellinger } 1048e48354ceSNicholas Bellinger 1049e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1050e48354ceSNicholas Bellinger { 1051e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1052e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1053e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1054e48354ceSNicholas Bellinger return; 1055e48354ceSNicholas Bellinger } 1056e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1057e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1058e48354ceSNicholas Bellinger 1059e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1060e48354ceSNicholas Bellinger 1061e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1062e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1063e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1064e48354ceSNicholas Bellinger } 1065e48354ceSNicholas Bellinger 1066e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1067e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1068e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1069e48354ceSNicholas Bellinger int use_misc) 1070e48354ceSNicholas Bellinger { 1071e48354ceSNicholas Bellinger int tx_sent, tx_size; 1072e48354ceSNicholas Bellinger u32 iov_count; 1073e48354ceSNicholas Bellinger struct kvec *iov; 1074e48354ceSNicholas Bellinger 1075e48354ceSNicholas Bellinger send_data: 1076e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1077e48354ceSNicholas Bellinger 1078e48354ceSNicholas Bellinger if (!use_misc) { 1079e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1080e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1081e48354ceSNicholas Bellinger } else { 1082e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1083e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1084e48354ceSNicholas Bellinger } 1085e48354ceSNicholas Bellinger 1086e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1087e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1088e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1089e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1090e48354ceSNicholas Bellinger goto send_data; 1091e48354ceSNicholas Bellinger } else 1092e48354ceSNicholas Bellinger return -1; 1093e48354ceSNicholas Bellinger } 1094e48354ceSNicholas Bellinger cmd->tx_size = 0; 1095e48354ceSNicholas Bellinger 1096e48354ceSNicholas Bellinger return 0; 1097e48354ceSNicholas Bellinger } 1098e48354ceSNicholas Bellinger 1099e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1100e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1101e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1102e48354ceSNicholas Bellinger { 1103e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1104e48354ceSNicholas Bellinger struct kvec iov; 1105e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1106e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 110740b05497SNicholas Bellinger int tx_sent, iov_off; 1108e48354ceSNicholas Bellinger 1109e48354ceSNicholas Bellinger send_hdr: 1110e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1111e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1112e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1113e48354ceSNicholas Bellinger 1114e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1115e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1116e48354ceSNicholas Bellinger 1117e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1118e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1119e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1120e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1121e48354ceSNicholas Bellinger goto send_hdr; 1122e48354ceSNicholas Bellinger } 1123e48354ceSNicholas Bellinger return -1; 1124e48354ceSNicholas Bellinger } 1125e48354ceSNicholas Bellinger 1126e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 112740b05497SNicholas Bellinger /* 112840b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 112940b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 113040b05497SNicholas Bellinger */ 113140b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1132e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 113340b05497SNicholas Bellinger if (cmd->padding) 113440b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 113540b05497SNicholas Bellinger else 113640b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 113740b05497SNicholas Bellinger } else { 113840b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 113940b05497SNicholas Bellinger } 1140e48354ceSNicholas Bellinger /* 1141e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1142e48354ceSNicholas Bellinger */ 1143e48354ceSNicholas Bellinger while (data_len) { 1144e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1145e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1146e48354ceSNicholas Bellinger send_pg: 1147e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1148e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1149e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1150e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1151e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1152e48354ceSNicholas Bellinger " -EAGAIN\n"); 1153e48354ceSNicholas Bellinger goto send_pg; 1154e48354ceSNicholas Bellinger } 1155e48354ceSNicholas Bellinger 1156e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1157e48354ceSNicholas Bellinger tx_sent); 1158e48354ceSNicholas Bellinger return -1; 1159e48354ceSNicholas Bellinger } 1160e48354ceSNicholas Bellinger 1161e48354ceSNicholas Bellinger data_len -= sub_len; 1162e48354ceSNicholas Bellinger offset = 0; 1163e48354ceSNicholas Bellinger sg = sg_next(sg); 1164e48354ceSNicholas Bellinger } 1165e48354ceSNicholas Bellinger 1166e48354ceSNicholas Bellinger send_padding: 1167e48354ceSNicholas Bellinger if (cmd->padding) { 116840b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1169e48354ceSNicholas Bellinger 1170e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1171e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1172e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1173e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1174e48354ceSNicholas Bellinger goto send_padding; 1175e48354ceSNicholas Bellinger } 1176e48354ceSNicholas Bellinger return -1; 1177e48354ceSNicholas Bellinger } 1178e48354ceSNicholas Bellinger } 1179e48354ceSNicholas Bellinger 1180e48354ceSNicholas Bellinger send_datacrc: 1181e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 118240b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1183e48354ceSNicholas Bellinger 1184e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1185e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1186e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1187e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1188e48354ceSNicholas Bellinger goto send_datacrc; 1189e48354ceSNicholas Bellinger } 1190e48354ceSNicholas Bellinger return -1; 1191e48354ceSNicholas Bellinger } 1192e48354ceSNicholas Bellinger } 1193e48354ceSNicholas Bellinger 1194e48354ceSNicholas Bellinger return 0; 1195e48354ceSNicholas Bellinger } 1196e48354ceSNicholas Bellinger 1197e48354ceSNicholas Bellinger /* 1198e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1199e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1200e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1201e48354ceSNicholas Bellinger * 1202e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1203e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1204e48354ceSNicholas Bellinger */ 1205e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1206e48354ceSNicholas Bellinger { 1207e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1208baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1209e48354ceSNicholas Bellinger 1210baa4d64bSNicholas Bellinger login->login_failed = 1; 1211e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1212e48354ceSNicholas Bellinger 121368349756SNicholas Bellinger memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 121468349756SNicholas Bellinger 1215baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1216e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1217e48354ceSNicholas Bellinger hdr->status_class = status_class; 1218e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 121966c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1220e48354ceSNicholas Bellinger 1221baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1222e48354ceSNicholas Bellinger } 1223e48354ceSNicholas Bellinger 1224e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1225e48354ceSNicholas Bellinger { 1226e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1227e48354ceSNicholas Bellinger 1228e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1229e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1230e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1231e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1232e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1233e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1234e48354ceSNicholas Bellinger 1235e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1236e48354ceSNicholas Bellinger } 1237e48354ceSNicholas Bellinger 1238e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1239e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1240e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1241e48354ceSNicholas Bellinger { 1242e5a4b0bbSAl Viro int data = count->data_length, rx_loop = 0, total_rx = 0; 1243e48354ceSNicholas Bellinger struct msghdr msg; 1244e48354ceSNicholas Bellinger 1245e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1246e48354ceSNicholas Bellinger return -1; 1247e48354ceSNicholas Bellinger 1248e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1249e5a4b0bbSAl Viro iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, 1250e5a4b0bbSAl Viro count->iov, count->iov_count, data); 1251e48354ceSNicholas Bellinger 12522da62906SAl Viro while (msg_data_left(&msg)) { 12532da62906SAl Viro rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1254e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1255e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1256e48354ceSNicholas Bellinger rx_loop, total_rx); 1257e48354ceSNicholas Bellinger return rx_loop; 1258e48354ceSNicholas Bellinger } 1259e48354ceSNicholas Bellinger total_rx += rx_loop; 1260e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1261e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1262e48354ceSNicholas Bellinger } 1263e48354ceSNicholas Bellinger 1264e48354ceSNicholas Bellinger return total_rx; 1265e48354ceSNicholas Bellinger } 1266e48354ceSNicholas Bellinger 1267e48354ceSNicholas Bellinger int rx_data( 1268e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1269e48354ceSNicholas Bellinger struct kvec *iov, 1270e48354ceSNicholas Bellinger int iov_count, 1271e48354ceSNicholas Bellinger int data) 1272e48354ceSNicholas Bellinger { 1273e48354ceSNicholas Bellinger struct iscsi_data_count c; 1274e48354ceSNicholas Bellinger 1275e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1276e48354ceSNicholas Bellinger return -1; 1277e48354ceSNicholas Bellinger 1278e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1279e48354ceSNicholas Bellinger c.iov = iov; 1280e48354ceSNicholas Bellinger c.iov_count = iov_count; 1281e48354ceSNicholas Bellinger c.data_length = data; 1282e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1283e48354ceSNicholas Bellinger 1284e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1285e48354ceSNicholas Bellinger } 1286e48354ceSNicholas Bellinger 1287e48354ceSNicholas Bellinger int tx_data( 1288e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1289e48354ceSNicholas Bellinger struct kvec *iov, 1290e48354ceSNicholas Bellinger int iov_count, 1291e48354ceSNicholas Bellinger int data) 1292e48354ceSNicholas Bellinger { 12934113e47bSAl Viro struct msghdr msg; 12944113e47bSAl Viro int total_tx = 0; 1295e48354ceSNicholas Bellinger 1296e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1297e48354ceSNicholas Bellinger return -1; 1298e48354ceSNicholas Bellinger 12994113e47bSAl Viro if (data <= 0) { 13004113e47bSAl Viro pr_err("Data length is: %d\n", data); 13014113e47bSAl Viro return -1; 13024113e47bSAl Viro } 1303e48354ceSNicholas Bellinger 13044113e47bSAl Viro memset(&msg, 0, sizeof(struct msghdr)); 13054113e47bSAl Viro 13064113e47bSAl Viro iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, 13074113e47bSAl Viro iov, iov_count, data); 13084113e47bSAl Viro 13094113e47bSAl Viro while (msg_data_left(&msg)) { 13104113e47bSAl Viro int tx_loop = sock_sendmsg(conn->sock, &msg); 13114113e47bSAl Viro if (tx_loop <= 0) { 13124113e47bSAl Viro pr_debug("tx_loop: %d total_tx %d\n", 13134113e47bSAl Viro tx_loop, total_tx); 13144113e47bSAl Viro return tx_loop; 13154113e47bSAl Viro } 13164113e47bSAl Viro total_tx += tx_loop; 13174113e47bSAl Viro pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 13184113e47bSAl Viro tx_loop, total_tx, data); 13194113e47bSAl Viro } 13204113e47bSAl Viro 13214113e47bSAl Viro return total_tx; 1322e48354ceSNicholas Bellinger } 1323e48354ceSNicholas Bellinger 1324e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1325e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1326e48354ceSNicholas Bellinger u8 status_class, 1327e48354ceSNicholas Bellinger u8 status_detail) 1328e48354ceSNicholas Bellinger { 1329e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1330e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1331e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1332e48354ceSNicholas Bellinger 1333e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1334e48354ceSNicholas Bellinger if (!tiqn) 1335e48354ceSNicholas Bellinger return; 1336e48354ceSNicholas Bellinger 1337e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1338e48354ceSNicholas Bellinger 1339e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1340e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1341e48354ceSNicholas Bellinger ls->accepts++; 1342e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1343e48354ceSNicholas Bellinger ls->redirects++; 1344e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1345e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1346e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1347e48354ceSNicholas Bellinger ls->authenticate_fails++; 1348e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1349e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1350e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1351e48354ceSNicholas Bellinger ls->authorize_fails++; 1352e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1353e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1354e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1355e48354ceSNicholas Bellinger ls->negotiate_fails++; 1356e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1357e48354ceSNicholas Bellinger } else { 1358e48354ceSNicholas Bellinger ls->other_fails++; 1359e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1360e48354ceSNicholas Bellinger } 1361e48354ceSNicholas Bellinger 1362e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1363e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1364e48354ceSNicholas Bellinger if (conn->param_list) 1365e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1366e48354ceSNicholas Bellinger conn->param_list); 1367fdc84d11SJoern Engel strlcpy(ls->last_intr_fail_name, 1368fdc84d11SJoern Engel (intrname ? intrname->value : "Unknown"), 1369fdc84d11SJoern Engel sizeof(ls->last_intr_fail_name)); 1370e48354ceSNicholas Bellinger 1371baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1372baa4d64bSNicholas Bellinger 1373dc58f760SAndy Grover ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1374e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1375e48354ceSNicholas Bellinger } 1376e48354ceSNicholas Bellinger 1377e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1378e48354ceSNicholas Bellinger } 1379e48354ceSNicholas Bellinger 1380e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1381e48354ceSNicholas Bellinger { 1382e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1383e48354ceSNicholas Bellinger 138417c61ad6SNicholas Bellinger if (!conn) 1385e48354ceSNicholas Bellinger return NULL; 1386e48354ceSNicholas Bellinger 138717c61ad6SNicholas Bellinger tpg = conn->tpg; 1388e48354ceSNicholas Bellinger if (!tpg) 1389e48354ceSNicholas Bellinger return NULL; 1390e48354ceSNicholas Bellinger 1391e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1392e48354ceSNicholas Bellinger return NULL; 1393e48354ceSNicholas Bellinger 1394e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1395e48354ceSNicholas Bellinger } 1396