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); 179f7c9564aSKees Cook timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0); 180e48354ceSNicholas Bellinger 181e48354ceSNicholas Bellinger return cmd; 182e48354ceSNicholas Bellinger } 183cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 184e48354ceSNicholas Bellinger 185e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 186e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 187e48354ceSNicholas Bellinger u32 seq_send_order) 188e48354ceSNicholas Bellinger { 189e48354ceSNicholas Bellinger u32 i; 190e48354ceSNicholas Bellinger 191e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 192e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 193e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 194e48354ceSNicholas Bellinger 195e48354ceSNicholas Bellinger return NULL; 196e48354ceSNicholas Bellinger } 197e48354ceSNicholas Bellinger 198e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 199e48354ceSNicholas Bellinger { 200e48354ceSNicholas Bellinger u32 i; 201e48354ceSNicholas Bellinger 202e48354ceSNicholas Bellinger if (!cmd->seq_list) { 203e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 204e48354ceSNicholas Bellinger return NULL; 205e48354ceSNicholas Bellinger } 206e48354ceSNicholas Bellinger 207e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 208e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 209e48354ceSNicholas Bellinger continue; 210e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 211e48354ceSNicholas Bellinger cmd->seq_send_order++; 212e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 213e48354ceSNicholas Bellinger } 214e48354ceSNicholas Bellinger } 215e48354ceSNicholas Bellinger 216e48354ceSNicholas Bellinger return NULL; 217e48354ceSNicholas Bellinger } 218e48354ceSNicholas Bellinger 219e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 220e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 221e48354ceSNicholas Bellinger u32 r2t_sn) 222e48354ceSNicholas Bellinger { 223e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 224e48354ceSNicholas Bellinger 225e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 226e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 227e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 228e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 229e48354ceSNicholas Bellinger return r2t; 230e48354ceSNicholas Bellinger } 231e48354ceSNicholas Bellinger } 232e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 233e48354ceSNicholas Bellinger 234e48354ceSNicholas Bellinger return NULL; 235e48354ceSNicholas Bellinger } 236e48354ceSNicholas Bellinger 237e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 238e48354ceSNicholas Bellinger { 239109e2381SRoland Dreier u32 max_cmdsn; 240e48354ceSNicholas Bellinger int ret; 241e48354ceSNicholas Bellinger 242e48354ceSNicholas Bellinger /* 243e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 244e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 245e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 246e48354ceSNicholas Bellinger * CRC failures. 247e48354ceSNicholas Bellinger */ 248109e2381SRoland Dreier max_cmdsn = atomic_read(&sess->max_cmd_sn); 249109e2381SRoland Dreier if (iscsi_sna_gt(cmdsn, max_cmdsn)) { 250e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 251109e2381SRoland Dreier " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); 252ea7e32beSNicholas Bellinger ret = CMDSN_MAXCMDSN_OVERRUN; 253e48354ceSNicholas Bellinger 254e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 255e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 256e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 257e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 258e48354ceSNicholas Bellinger sess->exp_cmd_sn); 259e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 260e48354ceSNicholas Bellinger 261e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 262e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 263e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 264e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 265e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 266e48354ceSNicholas Bellinger 267e48354ceSNicholas Bellinger } else { 268e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 269e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 270e48354ceSNicholas Bellinger sess->exp_cmd_sn); 271e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 272e48354ceSNicholas Bellinger } 273e48354ceSNicholas Bellinger 274e48354ceSNicholas Bellinger return ret; 275e48354ceSNicholas Bellinger } 276e48354ceSNicholas Bellinger 277e48354ceSNicholas Bellinger /* 278e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 279e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 280e48354ceSNicholas Bellinger */ 281561bf158SNicholas Bellinger int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 282561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 283e48354ceSNicholas Bellinger { 284561bf158SNicholas Bellinger int ret, cmdsn_ret; 285561bf158SNicholas Bellinger bool reject = false; 286561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 287e48354ceSNicholas Bellinger 288e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 289e48354ceSNicholas Bellinger 29050e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 291e48354ceSNicholas Bellinger switch (cmdsn_ret) { 292e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 293e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 294e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 295e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 296561bf158SNicholas Bellinger else if (ret < 0) { 297561bf158SNicholas Bellinger reject = true; 298561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 299561bf158SNicholas Bellinger } 300e48354ceSNicholas Bellinger break; 301e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 30250e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 303561bf158SNicholas Bellinger if (ret < 0) { 304561bf158SNicholas Bellinger reject = true; 305561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 306561bf158SNicholas Bellinger break; 307561bf158SNicholas Bellinger } 308561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 309e48354ceSNicholas Bellinger break; 310e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 311ea7e32beSNicholas Bellinger case CMDSN_MAXCMDSN_OVERRUN: 312ea7e32beSNicholas Bellinger default: 313e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 314e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 315ea7e32beSNicholas Bellinger /* 316ea7e32beSNicholas Bellinger * Existing callers for iscsit_sequence_cmd() will silently 317ea7e32beSNicholas Bellinger * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 318ea7e32beSNicholas Bellinger * return for CMDSN_MAXCMDSN_OVERRUN as well.. 319ea7e32beSNicholas Bellinger */ 320ea7e32beSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 321e48354ceSNicholas Bellinger break; 322e48354ceSNicholas Bellinger } 323e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 324e48354ceSNicholas Bellinger 325561bf158SNicholas Bellinger if (reject) 326561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 327561bf158SNicholas Bellinger 328e48354ceSNicholas Bellinger return ret; 329e48354ceSNicholas Bellinger } 3303e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 331e48354ceSNicholas Bellinger 332e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 333e48354ceSNicholas Bellinger { 334e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 335e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 336e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 337e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 338e48354ceSNicholas Bellinger 339e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 340e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 341e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 342e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 343e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 344e48354ceSNicholas Bellinger return -1; 345e48354ceSNicholas Bellinger } 346e48354ceSNicholas Bellinger 347e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 348e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 349e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 350e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 351e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 352e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 353e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 354e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 355e48354ceSNicholas Bellinger return -1; 356e48354ceSNicholas Bellinger } 357e48354ceSNicholas Bellinger 358e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 359e48354ceSNicholas Bellinger return 0; 360e48354ceSNicholas Bellinger 361ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 362e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 363e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 364e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 365e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 366e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 367e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 368ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 369e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 370e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 371e48354ceSNicholas Bellinger return -1; 372e48354ceSNicholas Bellinger } 373e48354ceSNicholas Bellinger return 0; 374e48354ceSNicholas Bellinger } 375e48354ceSNicholas Bellinger 376e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 377e48354ceSNicholas Bellinger struct iscsi_conn *conn, 37866c7db68SChristoph Hellwig itt_t init_task_tag) 379e48354ceSNicholas Bellinger { 380e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 381e48354ceSNicholas Bellinger 382e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3832fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 384e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 385e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 386e48354ceSNicholas Bellinger return cmd; 387e48354ceSNicholas Bellinger } 388e48354ceSNicholas Bellinger } 389e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 390e48354ceSNicholas Bellinger 391e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 392e48354ceSNicholas Bellinger init_task_tag, conn->cid); 393e48354ceSNicholas Bellinger return NULL; 394e48354ceSNicholas Bellinger } 395e4f4e801SSagi Grimberg EXPORT_SYMBOL(iscsit_find_cmd_from_itt); 396e48354ceSNicholas Bellinger 397e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 398e48354ceSNicholas Bellinger struct iscsi_conn *conn, 39966c7db68SChristoph Hellwig itt_t init_task_tag, 400e48354ceSNicholas Bellinger u32 length) 401e48354ceSNicholas Bellinger { 402e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 403e48354ceSNicholas Bellinger 404e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4052fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 4063687db88SNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 4073687db88SNicholas Bellinger continue; 408e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 409e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 410e48354ceSNicholas Bellinger return cmd; 411e48354ceSNicholas Bellinger } 412e48354ceSNicholas Bellinger } 413e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 414e48354ceSNicholas Bellinger 415e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 416e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 417e48354ceSNicholas Bellinger if (length) 418e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 419e48354ceSNicholas Bellinger 420e48354ceSNicholas Bellinger return NULL; 421e48354ceSNicholas Bellinger } 4229a584bf9SVarun Prakash EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); 423e48354ceSNicholas Bellinger 424e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 425e48354ceSNicholas Bellinger struct iscsi_conn *conn, 426e48354ceSNicholas Bellinger u32 targ_xfer_tag) 427e48354ceSNicholas Bellinger { 428e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 429e48354ceSNicholas Bellinger 430e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4312fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 432e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 433e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 434e48354ceSNicholas Bellinger return cmd; 435e48354ceSNicholas Bellinger } 436e48354ceSNicholas Bellinger } 437e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 438e48354ceSNicholas Bellinger 439e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 440e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 441e48354ceSNicholas Bellinger return NULL; 442e48354ceSNicholas Bellinger } 443e48354ceSNicholas Bellinger 444e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 445e48354ceSNicholas Bellinger struct iscsi_session *sess, 446e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 447e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 44866c7db68SChristoph Hellwig itt_t init_task_tag) 449e48354ceSNicholas Bellinger { 450e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 451e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 452e48354ceSNicholas Bellinger /* 453e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 454e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 455e48354ceSNicholas Bellinger */ 456e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 457e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 458e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4592fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 460e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 461e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 462e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 463e48354ceSNicholas Bellinger 464e48354ceSNicholas Bellinger *cr_ptr = cr; 465e48354ceSNicholas Bellinger *cmd_ptr = cmd; 466e48354ceSNicholas Bellinger return -2; 467e48354ceSNicholas Bellinger } 468e48354ceSNicholas Bellinger } 469e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 470e48354ceSNicholas Bellinger } 471e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 472e48354ceSNicholas Bellinger /* 473e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 474e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 475e48354ceSNicholas Bellinger */ 476e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 477e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 478e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4792fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 480e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 481e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 482e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 483e48354ceSNicholas Bellinger 484e48354ceSNicholas Bellinger *cr_ptr = cr; 485e48354ceSNicholas Bellinger *cmd_ptr = cmd; 486e48354ceSNicholas Bellinger return 0; 487e48354ceSNicholas Bellinger } 488e48354ceSNicholas Bellinger } 489e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 490e48354ceSNicholas Bellinger } 491e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 492e48354ceSNicholas Bellinger 493e48354ceSNicholas Bellinger return -1; 494e48354ceSNicholas Bellinger } 495e48354ceSNicholas Bellinger 496e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 497e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 498e48354ceSNicholas Bellinger struct iscsi_conn *conn, 499e48354ceSNicholas Bellinger u8 state) 500e48354ceSNicholas Bellinger { 501e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 502e48354ceSNicholas Bellinger 503e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 504e48354ceSNicholas Bellinger if (!qr) { 505e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 506e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 507e48354ceSNicholas Bellinger return; 508e48354ceSNicholas Bellinger } 509e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 510e48354ceSNicholas Bellinger qr->cmd = cmd; 511e48354ceSNicholas Bellinger qr->state = state; 512e48354ceSNicholas Bellinger 513e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 514e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 515e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 516e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 517e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 518e48354ceSNicholas Bellinger 519d5627acbSRoland Dreier wake_up(&conn->queues_wq); 520e48354ceSNicholas Bellinger } 521d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); 522e48354ceSNicholas Bellinger 523e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 524e48354ceSNicholas Bellinger { 525e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 526e48354ceSNicholas Bellinger 527e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 528e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 529e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 530e48354ceSNicholas Bellinger return NULL; 531e48354ceSNicholas Bellinger } 5321f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5331f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 534e48354ceSNicholas Bellinger 535e48354ceSNicholas Bellinger list_del(&qr->qr_list); 536e48354ceSNicholas Bellinger if (qr->cmd) 537e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 538e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 539e48354ceSNicholas Bellinger 540e48354ceSNicholas Bellinger return qr; 541e48354ceSNicholas Bellinger } 542e48354ceSNicholas Bellinger 543e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 544e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 545e48354ceSNicholas Bellinger struct iscsi_conn *conn) 546e48354ceSNicholas Bellinger { 547e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 548e48354ceSNicholas Bellinger 549e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 550e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 551e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 552e48354ceSNicholas Bellinger return; 553e48354ceSNicholas Bellinger } 554e48354ceSNicholas Bellinger 555e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 556e48354ceSNicholas Bellinger if (qr->cmd != cmd) 557e48354ceSNicholas Bellinger continue; 558e48354ceSNicholas Bellinger 559e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 560e48354ceSNicholas Bellinger list_del(&qr->qr_list); 561e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 562e48354ceSNicholas Bellinger } 563e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 564e48354ceSNicholas Bellinger 565e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 566e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 567e48354ceSNicholas Bellinger cmd->init_task_tag, 568e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 569e48354ceSNicholas Bellinger } 570e48354ceSNicholas Bellinger } 571e48354ceSNicholas Bellinger 572a4467018SNicholas Bellinger int iscsit_add_cmd_to_response_queue( 573e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 574e48354ceSNicholas Bellinger struct iscsi_conn *conn, 575e48354ceSNicholas Bellinger u8 state) 576e48354ceSNicholas Bellinger { 577e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 578e48354ceSNicholas Bellinger 579e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 580e48354ceSNicholas Bellinger if (!qr) { 581e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 582e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 583a4467018SNicholas Bellinger return -ENOMEM; 584e48354ceSNicholas Bellinger } 585e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 586e48354ceSNicholas Bellinger qr->cmd = cmd; 587e48354ceSNicholas Bellinger qr->state = state; 588e48354ceSNicholas Bellinger 589e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 590e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 591e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 592e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 593e48354ceSNicholas Bellinger 594d5627acbSRoland Dreier wake_up(&conn->queues_wq); 595a4467018SNicholas Bellinger return 0; 596e48354ceSNicholas Bellinger } 597e48354ceSNicholas Bellinger 598e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 599e48354ceSNicholas Bellinger { 600e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 601e48354ceSNicholas Bellinger 602e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 603e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 604e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 605e48354ceSNicholas Bellinger return NULL; 606e48354ceSNicholas Bellinger } 607e48354ceSNicholas Bellinger 6081f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6091f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 610e48354ceSNicholas Bellinger 611e48354ceSNicholas Bellinger list_del(&qr->qr_list); 612e48354ceSNicholas Bellinger if (qr->cmd) 613e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 614e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 615e48354ceSNicholas Bellinger 616e48354ceSNicholas Bellinger return qr; 617e48354ceSNicholas Bellinger } 618e48354ceSNicholas Bellinger 619e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 620e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 621e48354ceSNicholas Bellinger struct iscsi_conn *conn) 622e48354ceSNicholas Bellinger { 623e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 624e48354ceSNicholas Bellinger 625e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 626e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 627e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 628e48354ceSNicholas Bellinger return; 629e48354ceSNicholas Bellinger } 630e48354ceSNicholas Bellinger 631e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 632e48354ceSNicholas Bellinger qr_list) { 633e48354ceSNicholas Bellinger if (qr->cmd != cmd) 634e48354ceSNicholas Bellinger continue; 635e48354ceSNicholas Bellinger 636e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 637e48354ceSNicholas Bellinger list_del(&qr->qr_list); 638e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 639e48354ceSNicholas Bellinger } 640e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 641e48354ceSNicholas Bellinger 642e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 643e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 644e48354ceSNicholas Bellinger cmd->init_task_tag, 645e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 646e48354ceSNicholas Bellinger } 647e48354ceSNicholas Bellinger } 648e48354ceSNicholas Bellinger 649d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 650d5627acbSRoland Dreier { 651d5627acbSRoland Dreier bool empty; 652d5627acbSRoland Dreier 653d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 654d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 655d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 656d5627acbSRoland Dreier 657d5627acbSRoland Dreier if (!empty) 658d5627acbSRoland Dreier return empty; 659d5627acbSRoland Dreier 660d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 661d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 662d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 663d5627acbSRoland Dreier 664d5627acbSRoland Dreier return empty; 665d5627acbSRoland Dreier } 666d5627acbSRoland Dreier 667e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 668e48354ceSNicholas Bellinger { 669e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 670e48354ceSNicholas Bellinger 671e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 672e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 673e48354ceSNicholas Bellinger list_del(&qr->qr_list); 674e48354ceSNicholas Bellinger if (qr->cmd) 675e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 676e48354ceSNicholas Bellinger 677e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 678e48354ceSNicholas Bellinger } 679e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 680e48354ceSNicholas Bellinger 681e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 682e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 683e48354ceSNicholas Bellinger qr_list) { 684e48354ceSNicholas Bellinger list_del(&qr->qr_list); 685e48354ceSNicholas Bellinger if (qr->cmd) 686e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 687e48354ceSNicholas Bellinger 688e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 689e48354ceSNicholas Bellinger } 690e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 691e48354ceSNicholas Bellinger } 692e48354ceSNicholas Bellinger 693e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 694e48354ceSNicholas Bellinger { 695988e3a85SNicholas Bellinger struct iscsi_session *sess; 696988e3a85SNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 697988e3a85SNicholas Bellinger 6986eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 6996eaf69e4SBart Van Assche 700988e3a85SNicholas Bellinger if (cmd->conn) 701988e3a85SNicholas Bellinger sess = cmd->conn->sess; 702988e3a85SNicholas Bellinger else 703988e3a85SNicholas Bellinger sess = cmd->sess; 704988e3a85SNicholas Bellinger 705988e3a85SNicholas Bellinger BUG_ON(!sess || !sess->se_sess); 706988e3a85SNicholas Bellinger 707e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 708e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 709e48354ceSNicholas Bellinger kfree(cmd->seq_list); 710e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 711e48354ceSNicholas Bellinger kfree(cmd->iov_data); 7129864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 713e48354ceSNicholas Bellinger 71483c2b54bSMatthew Wilcox target_free_tag(sess->se_sess, se_cmd); 715e48354ceSNicholas Bellinger } 716d703ce2fSNicholas Bellinger EXPORT_SYMBOL(iscsit_release_cmd); 717e48354ceSNicholas Bellinger 7184412a671SBart Van Assche void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool check_queues) 719d270190aSNicholas Bellinger { 720aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 721aafc9d15SNicholas Bellinger 7226eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 7236eaf69e4SBart Van Assche 724aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 725aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 726aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 727aafc9d15SNicholas Bellinger } 728aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 729aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 730aafc9d15SNicholas Bellinger 731aafc9d15SNicholas Bellinger if (conn && check_queues) { 732aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 733aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 734aafc9d15SNicholas Bellinger } 7357ec811a8SVarun Prakash 7367ec811a8SVarun Prakash if (conn && conn->conn_transport->iscsit_release_cmd) 7377ec811a8SVarun Prakash conn->conn_transport->iscsit_release_cmd(conn, cmd); 738aafc9d15SNicholas Bellinger } 739aafc9d15SNicholas Bellinger 740aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 741aafc9d15SNicholas Bellinger { 742d1c26857SBart Van Assche struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL; 743aafc9d15SNicholas Bellinger int rc; 7444412a671SBart Van Assche 7454412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 746d1c26857SBart Van Assche if (se_cmd) { 747efb2ea77SNicholas Bellinger rc = transport_generic_free_cmd(se_cmd, shutdown); 748efb2ea77SNicholas Bellinger if (!rc && shutdown && se_cmd->se_sess) { 7494412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 750afc16604SBart Van Assche target_put_sess_cmd(se_cmd); 751aafc9d15SNicholas Bellinger } 752d1c26857SBart Van Assche } else { 753d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 754d270190aSNicholas Bellinger } 755d270190aSNicholas Bellinger } 756d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_free_cmd); 757d270190aSNicholas Bellinger 758e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 759e48354ceSNicholas Bellinger { 760e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 761e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 762e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 763e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 764e48354ceSNicholas Bellinger if (in_interrupt()) 765e48354ceSNicholas Bellinger return 2; 766e48354ceSNicholas Bellinger 767e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 768e48354ceSNicholas Bellinger return 1; 769e48354ceSNicholas Bellinger } 770e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 771e48354ceSNicholas Bellinger 772e48354ceSNicholas Bellinger return 0; 773e48354ceSNicholas Bellinger } 774e48354ceSNicholas Bellinger 775e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 776e48354ceSNicholas Bellinger { 777e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 778e48354ceSNicholas Bellinger sess->session_usage_count--; 779e48354ceSNicholas Bellinger 780e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 781e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 782e48354ceSNicholas Bellinger 783e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 784e48354ceSNicholas Bellinger } 785e48354ceSNicholas Bellinger 786e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 787e48354ceSNicholas Bellinger { 788e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 789e48354ceSNicholas Bellinger sess->session_usage_count++; 790e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 791e48354ceSNicholas Bellinger } 792e48354ceSNicholas Bellinger 793e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 794e48354ceSNicholas Bellinger { 795e48354ceSNicholas Bellinger struct iscsi_conn *conn; 796e48354ceSNicholas Bellinger 797e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 798e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 799e48354ceSNicholas Bellinger if ((conn->cid == cid) && 800e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 801e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 802e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 803e48354ceSNicholas Bellinger return conn; 804e48354ceSNicholas Bellinger } 805e48354ceSNicholas Bellinger } 806e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 807e48354ceSNicholas Bellinger 808e48354ceSNicholas Bellinger return NULL; 809e48354ceSNicholas Bellinger } 810e48354ceSNicholas Bellinger 811e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 812e48354ceSNicholas Bellinger { 813e48354ceSNicholas Bellinger struct iscsi_conn *conn; 814e48354ceSNicholas Bellinger 815e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 816e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 817e48354ceSNicholas Bellinger if (conn->cid == cid) { 818e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 819e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 820e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 821e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 822e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 823e48354ceSNicholas Bellinger return conn; 824e48354ceSNicholas Bellinger } 825e48354ceSNicholas Bellinger } 826e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 827e48354ceSNicholas Bellinger 828e48354ceSNicholas Bellinger return NULL; 829e48354ceSNicholas Bellinger } 830e48354ceSNicholas Bellinger 831e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 832e48354ceSNicholas Bellinger { 833e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 834e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 835e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 836e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 837e48354ceSNicholas Bellinger 838e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 839e48354ceSNicholas Bellinger return; 840e48354ceSNicholas Bellinger } 841e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 842e48354ceSNicholas Bellinger } 843e48354ceSNicholas Bellinger 844e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 845e48354ceSNicholas Bellinger { 846e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 847e48354ceSNicholas Bellinger conn->conn_usage_count--; 848e48354ceSNicholas Bellinger 849e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 850e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 851e48354ceSNicholas Bellinger 852e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 853e48354ceSNicholas Bellinger } 854e48354ceSNicholas Bellinger 855e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 856e48354ceSNicholas Bellinger { 857e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 858e48354ceSNicholas Bellinger conn->conn_usage_count++; 859e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 860e48354ceSNicholas Bellinger } 861e48354ceSNicholas Bellinger 862e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 863e48354ceSNicholas Bellinger { 864e48354ceSNicholas Bellinger u8 state; 865e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 866e48354ceSNicholas Bellinger 867676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 868e48354ceSNicholas Bellinger if (!cmd) 869e48354ceSNicholas Bellinger return -1; 870e48354ceSNicholas Bellinger 871e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 872e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 873e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 87466c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 875c1e34b64SSagi Grimberg cmd->targ_xfer_tag = (want_response) ? 876c1e34b64SSagi Grimberg session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 877e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 8782fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 879e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 880e48354ceSNicholas Bellinger 881e48354ceSNicholas Bellinger if (want_response) 882e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 883e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 884e48354ceSNicholas Bellinger 885e48354ceSNicholas Bellinger return 0; 886e48354ceSNicholas Bellinger } 887e48354ceSNicholas Bellinger 888f7c9564aSKees Cook void iscsit_handle_nopin_response_timeout(struct timer_list *t) 889e48354ceSNicholas Bellinger { 890f7c9564aSKees Cook struct iscsi_conn *conn = from_timer(conn, t, nopin_response_timer); 891e48354ceSNicholas Bellinger 892e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 893e48354ceSNicholas Bellinger 894e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 895e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 896e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 897e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 898e48354ceSNicholas Bellinger return; 899e48354ceSNicholas Bellinger } 900e48354ceSNicholas Bellinger 901e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 902e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 903e48354ceSNicholas Bellinger conn->sess->sid); 904e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 905e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 906e48354ceSNicholas Bellinger 907e48354ceSNicholas Bellinger { 908e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 909e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 910e48354ceSNicholas Bellinger 911e48354ceSNicholas Bellinger if (tiqn) { 912e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 913e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9148359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 915e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 916e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 917e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 91804f3b31bSNicholas Bellinger atomic_long_inc(&conn->sess->conn_timeout_errors); 919e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 920e48354ceSNicholas Bellinger } 921e48354ceSNicholas Bellinger } 922e48354ceSNicholas Bellinger 923e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 924e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 925e48354ceSNicholas Bellinger } 926e48354ceSNicholas Bellinger 927e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 928e48354ceSNicholas Bellinger { 929e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 930e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 931e48354ceSNicholas Bellinger 932e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 933e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 934e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 935e48354ceSNicholas Bellinger return; 936e48354ceSNicholas Bellinger } 937e48354ceSNicholas Bellinger 938e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 939e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 940e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 941e48354ceSNicholas Bellinger } 942e48354ceSNicholas Bellinger 943e48354ceSNicholas Bellinger /* 944e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 945e48354ceSNicholas Bellinger */ 946e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 947e48354ceSNicholas Bellinger { 948e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 949e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 950e48354ceSNicholas Bellinger 951e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 952e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 953e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 954e48354ceSNicholas Bellinger return; 955e48354ceSNicholas Bellinger } 956e48354ceSNicholas Bellinger 957e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 958e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 9598a47aa9dSBart Van Assche mod_timer(&conn->nopin_response_timer, 9608a47aa9dSBart Van Assche jiffies + na->nopin_response_timeout * HZ); 961e48354ceSNicholas Bellinger 962e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 963e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 964e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 965e48354ceSNicholas Bellinger } 966e48354ceSNicholas Bellinger 967e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 968e48354ceSNicholas Bellinger { 969e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 970e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 971e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 972e48354ceSNicholas Bellinger return; 973e48354ceSNicholas Bellinger } 974e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 975e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 976e48354ceSNicholas Bellinger 977e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 978e48354ceSNicholas Bellinger 979e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 980e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 981e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 982e48354ceSNicholas Bellinger } 983e48354ceSNicholas Bellinger 984f7c9564aSKees Cook void iscsit_handle_nopin_timeout(struct timer_list *t) 985e48354ceSNicholas Bellinger { 986f7c9564aSKees Cook struct iscsi_conn *conn = from_timer(conn, t, nopin_timer); 987e48354ceSNicholas Bellinger 988e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 989e48354ceSNicholas Bellinger 990e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 991e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 992e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 993e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 994e48354ceSNicholas Bellinger return; 995e48354ceSNicholas Bellinger } 996e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 997e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 998e48354ceSNicholas Bellinger 999e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1000e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1001e48354ceSNicholas Bellinger } 1002e48354ceSNicholas Bellinger 1003e48354ceSNicholas Bellinger /* 1004e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1005e48354ceSNicholas Bellinger */ 1006e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1007e48354ceSNicholas Bellinger { 1008e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1009e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1010e48354ceSNicholas Bellinger /* 1011e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1012e48354ceSNicholas Bellinger */ 1013e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1014e48354ceSNicholas Bellinger return; 1015e48354ceSNicholas Bellinger 1016e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1017e48354ceSNicholas Bellinger return; 1018e48354ceSNicholas Bellinger 1019e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1020e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 10218a47aa9dSBart Van Assche mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 1022e48354ceSNicholas Bellinger 1023e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1024e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1025e48354ceSNicholas Bellinger } 1026e48354ceSNicholas Bellinger 1027e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1028e48354ceSNicholas Bellinger { 1029e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1030e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1031e48354ceSNicholas Bellinger /* 1032e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1033e48354ceSNicholas Bellinger */ 1034e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1035e48354ceSNicholas Bellinger return; 1036e48354ceSNicholas Bellinger 1037e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1038e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1039e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1040e48354ceSNicholas Bellinger return; 1041e48354ceSNicholas Bellinger } 1042e48354ceSNicholas Bellinger 1043e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1044e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 10458a47aa9dSBart Van Assche mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 1046e48354ceSNicholas Bellinger 1047e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1048e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1049e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1050e48354ceSNicholas Bellinger } 1051e48354ceSNicholas Bellinger 1052e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1053e48354ceSNicholas Bellinger { 1054e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1055e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1056e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1057e48354ceSNicholas Bellinger return; 1058e48354ceSNicholas Bellinger } 1059e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1060e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1061e48354ceSNicholas Bellinger 1062e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1063e48354ceSNicholas Bellinger 1064e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1065e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1066e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1067e48354ceSNicholas Bellinger } 1068e48354ceSNicholas Bellinger 1069e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1070e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1071e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1072e48354ceSNicholas Bellinger int use_misc) 1073e48354ceSNicholas Bellinger { 1074e48354ceSNicholas Bellinger int tx_sent, tx_size; 1075e48354ceSNicholas Bellinger u32 iov_count; 1076e48354ceSNicholas Bellinger struct kvec *iov; 1077e48354ceSNicholas Bellinger 1078e48354ceSNicholas Bellinger send_data: 1079e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1080e48354ceSNicholas Bellinger 1081e48354ceSNicholas Bellinger if (!use_misc) { 1082e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1083e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1084e48354ceSNicholas Bellinger } else { 1085e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1086e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1087e48354ceSNicholas Bellinger } 1088e48354ceSNicholas Bellinger 1089e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1090e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1091e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1092e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1093e48354ceSNicholas Bellinger goto send_data; 1094e48354ceSNicholas Bellinger } else 1095e48354ceSNicholas Bellinger return -1; 1096e48354ceSNicholas Bellinger } 1097e48354ceSNicholas Bellinger cmd->tx_size = 0; 1098e48354ceSNicholas Bellinger 1099e48354ceSNicholas Bellinger return 0; 1100e48354ceSNicholas Bellinger } 1101e48354ceSNicholas Bellinger 1102e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1103e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1104e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1105e48354ceSNicholas Bellinger { 1106e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1107e48354ceSNicholas Bellinger struct kvec iov; 1108e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1109e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 111040b05497SNicholas Bellinger int tx_sent, iov_off; 1111e48354ceSNicholas Bellinger 1112e48354ceSNicholas Bellinger send_hdr: 1113e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1114e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1115e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1116e48354ceSNicholas Bellinger 1117e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1118e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1119e48354ceSNicholas Bellinger 1120e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1121e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1122e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1123e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1124e48354ceSNicholas Bellinger goto send_hdr; 1125e48354ceSNicholas Bellinger } 1126e48354ceSNicholas Bellinger return -1; 1127e48354ceSNicholas Bellinger } 1128e48354ceSNicholas Bellinger 1129e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 113040b05497SNicholas Bellinger /* 113140b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 113240b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 113340b05497SNicholas Bellinger */ 113440b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1135e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 113640b05497SNicholas Bellinger if (cmd->padding) 113740b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 113840b05497SNicholas Bellinger else 113940b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 114040b05497SNicholas Bellinger } else { 114140b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 114240b05497SNicholas Bellinger } 1143e48354ceSNicholas Bellinger /* 1144e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1145e48354ceSNicholas Bellinger */ 1146e48354ceSNicholas Bellinger while (data_len) { 1147e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1148e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1149e48354ceSNicholas Bellinger send_pg: 1150e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1151e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1152e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1153e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1154e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1155e48354ceSNicholas Bellinger " -EAGAIN\n"); 1156e48354ceSNicholas Bellinger goto send_pg; 1157e48354ceSNicholas Bellinger } 1158e48354ceSNicholas Bellinger 1159e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1160e48354ceSNicholas Bellinger tx_sent); 1161e48354ceSNicholas Bellinger return -1; 1162e48354ceSNicholas Bellinger } 1163e48354ceSNicholas Bellinger 1164e48354ceSNicholas Bellinger data_len -= sub_len; 1165e48354ceSNicholas Bellinger offset = 0; 1166e48354ceSNicholas Bellinger sg = sg_next(sg); 1167e48354ceSNicholas Bellinger } 1168e48354ceSNicholas Bellinger 1169e48354ceSNicholas Bellinger send_padding: 1170e48354ceSNicholas Bellinger if (cmd->padding) { 117140b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1172e48354ceSNicholas Bellinger 1173e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1174e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1175e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1176e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1177e48354ceSNicholas Bellinger goto send_padding; 1178e48354ceSNicholas Bellinger } 1179e48354ceSNicholas Bellinger return -1; 1180e48354ceSNicholas Bellinger } 1181e48354ceSNicholas Bellinger } 1182e48354ceSNicholas Bellinger 1183e48354ceSNicholas Bellinger send_datacrc: 1184e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 118540b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1186e48354ceSNicholas Bellinger 1187e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1188e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1189e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1190e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1191e48354ceSNicholas Bellinger goto send_datacrc; 1192e48354ceSNicholas Bellinger } 1193e48354ceSNicholas Bellinger return -1; 1194e48354ceSNicholas Bellinger } 1195e48354ceSNicholas Bellinger } 1196e48354ceSNicholas Bellinger 1197e48354ceSNicholas Bellinger return 0; 1198e48354ceSNicholas Bellinger } 1199e48354ceSNicholas Bellinger 1200e48354ceSNicholas Bellinger /* 1201e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1202e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1203e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1204e48354ceSNicholas Bellinger * 1205e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1206e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1207e48354ceSNicholas Bellinger */ 1208e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1209e48354ceSNicholas Bellinger { 1210e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1211baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1212e48354ceSNicholas Bellinger 1213baa4d64bSNicholas Bellinger login->login_failed = 1; 1214e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1215e48354ceSNicholas Bellinger 121668349756SNicholas Bellinger memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 121768349756SNicholas Bellinger 1218baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1219e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1220e48354ceSNicholas Bellinger hdr->status_class = status_class; 1221e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 122266c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1223e48354ceSNicholas Bellinger 1224baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1225e48354ceSNicholas Bellinger } 1226e48354ceSNicholas Bellinger 1227e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1228e48354ceSNicholas Bellinger { 1229e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1230e48354ceSNicholas Bellinger 1231e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1232e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1233e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1234e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1235e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1236e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1237e48354ceSNicholas Bellinger 1238e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1239e48354ceSNicholas Bellinger } 1240e48354ceSNicholas Bellinger 1241e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1242e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1243e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1244e48354ceSNicholas Bellinger { 1245e5a4b0bbSAl Viro int data = count->data_length, rx_loop = 0, total_rx = 0; 1246e48354ceSNicholas Bellinger struct msghdr msg; 1247e48354ceSNicholas Bellinger 1248e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1249e48354ceSNicholas Bellinger return -1; 1250e48354ceSNicholas Bellinger 1251e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1252e5a4b0bbSAl Viro iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, 1253e5a4b0bbSAl Viro count->iov, count->iov_count, data); 1254e48354ceSNicholas Bellinger 12552da62906SAl Viro while (msg_data_left(&msg)) { 12562da62906SAl Viro rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1257e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1258e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1259e48354ceSNicholas Bellinger rx_loop, total_rx); 1260e48354ceSNicholas Bellinger return rx_loop; 1261e48354ceSNicholas Bellinger } 1262e48354ceSNicholas Bellinger total_rx += rx_loop; 1263e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1264e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1265e48354ceSNicholas Bellinger } 1266e48354ceSNicholas Bellinger 1267e48354ceSNicholas Bellinger return total_rx; 1268e48354ceSNicholas Bellinger } 1269e48354ceSNicholas Bellinger 1270e48354ceSNicholas Bellinger int rx_data( 1271e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1272e48354ceSNicholas Bellinger struct kvec *iov, 1273e48354ceSNicholas Bellinger int iov_count, 1274e48354ceSNicholas Bellinger int data) 1275e48354ceSNicholas Bellinger { 1276e48354ceSNicholas Bellinger struct iscsi_data_count c; 1277e48354ceSNicholas Bellinger 1278e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1279e48354ceSNicholas Bellinger return -1; 1280e48354ceSNicholas Bellinger 1281e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1282e48354ceSNicholas Bellinger c.iov = iov; 1283e48354ceSNicholas Bellinger c.iov_count = iov_count; 1284e48354ceSNicholas Bellinger c.data_length = data; 1285e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1286e48354ceSNicholas Bellinger 1287e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1288e48354ceSNicholas Bellinger } 1289e48354ceSNicholas Bellinger 1290e48354ceSNicholas Bellinger int tx_data( 1291e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1292e48354ceSNicholas Bellinger struct kvec *iov, 1293e48354ceSNicholas Bellinger int iov_count, 1294e48354ceSNicholas Bellinger int data) 1295e48354ceSNicholas Bellinger { 12964113e47bSAl Viro struct msghdr msg; 12974113e47bSAl Viro int total_tx = 0; 1298e48354ceSNicholas Bellinger 1299e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1300e48354ceSNicholas Bellinger return -1; 1301e48354ceSNicholas Bellinger 13024113e47bSAl Viro if (data <= 0) { 13034113e47bSAl Viro pr_err("Data length is: %d\n", data); 13044113e47bSAl Viro return -1; 13054113e47bSAl Viro } 1306e48354ceSNicholas Bellinger 13074113e47bSAl Viro memset(&msg, 0, sizeof(struct msghdr)); 13084113e47bSAl Viro 13094113e47bSAl Viro iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, 13104113e47bSAl Viro iov, iov_count, data); 13114113e47bSAl Viro 13124113e47bSAl Viro while (msg_data_left(&msg)) { 13134113e47bSAl Viro int tx_loop = sock_sendmsg(conn->sock, &msg); 13144113e47bSAl Viro if (tx_loop <= 0) { 13154113e47bSAl Viro pr_debug("tx_loop: %d total_tx %d\n", 13164113e47bSAl Viro tx_loop, total_tx); 13174113e47bSAl Viro return tx_loop; 13184113e47bSAl Viro } 13194113e47bSAl Viro total_tx += tx_loop; 13204113e47bSAl Viro pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 13214113e47bSAl Viro tx_loop, total_tx, data); 13224113e47bSAl Viro } 13234113e47bSAl Viro 13244113e47bSAl Viro return total_tx; 1325e48354ceSNicholas Bellinger } 1326e48354ceSNicholas Bellinger 1327e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1328e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1329e48354ceSNicholas Bellinger u8 status_class, 1330e48354ceSNicholas Bellinger u8 status_detail) 1331e48354ceSNicholas Bellinger { 1332e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1333e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1334e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1335e48354ceSNicholas Bellinger 1336e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1337e48354ceSNicholas Bellinger if (!tiqn) 1338e48354ceSNicholas Bellinger return; 1339e48354ceSNicholas Bellinger 1340e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1341e48354ceSNicholas Bellinger 1342e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1343e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1344e48354ceSNicholas Bellinger ls->accepts++; 1345e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1346e48354ceSNicholas Bellinger ls->redirects++; 1347e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1348e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1349e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1350e48354ceSNicholas Bellinger ls->authenticate_fails++; 1351e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1352e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1353e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1354e48354ceSNicholas Bellinger ls->authorize_fails++; 1355e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1356e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1357e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1358e48354ceSNicholas Bellinger ls->negotiate_fails++; 1359e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1360e48354ceSNicholas Bellinger } else { 1361e48354ceSNicholas Bellinger ls->other_fails++; 1362e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1363e48354ceSNicholas Bellinger } 1364e48354ceSNicholas Bellinger 1365e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1366e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1367e48354ceSNicholas Bellinger if (conn->param_list) 1368e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1369e48354ceSNicholas Bellinger conn->param_list); 1370fdc84d11SJoern Engel strlcpy(ls->last_intr_fail_name, 1371fdc84d11SJoern Engel (intrname ? intrname->value : "Unknown"), 1372fdc84d11SJoern Engel sizeof(ls->last_intr_fail_name)); 1373e48354ceSNicholas Bellinger 1374baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1375baa4d64bSNicholas Bellinger 1376dc58f760SAndy Grover ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1377e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1378e48354ceSNicholas Bellinger } 1379e48354ceSNicholas Bellinger 1380e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1381e48354ceSNicholas Bellinger } 1382e48354ceSNicholas Bellinger 1383e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1384e48354ceSNicholas Bellinger { 1385e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1386e48354ceSNicholas Bellinger 138717c61ad6SNicholas Bellinger if (!conn) 1388e48354ceSNicholas Bellinger return NULL; 1389e48354ceSNicholas Bellinger 139017c61ad6SNicholas Bellinger tpg = conn->tpg; 1391e48354ceSNicholas Bellinger if (!tpg) 1392e48354ceSNicholas Bellinger return NULL; 1393e48354ceSNicholas Bellinger 1394e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1395e48354ceSNicholas Bellinger return NULL; 1396e48354ceSNicholas Bellinger 1397e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1398e48354ceSNicholas Bellinger } 1399