1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2e48354ceSNicholas Bellinger /******************************************************************************* 3e48354ceSNicholas Bellinger * This file contains the iSCSI Target specific utility functions. 4e48354ceSNicholas Bellinger * 54c76251eSNicholas Bellinger * (c) Copyright 2007-2013 Datera, Inc. 6e48354ceSNicholas Bellinger * 7e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 8e48354ceSNicholas Bellinger * 9e48354ceSNicholas Bellinger ******************************************************************************/ 10e48354ceSNicholas Bellinger 11e48354ceSNicholas Bellinger #include <linux/list.h> 1210e9cbb6SMatthew Wilcox #include <linux/sched/signal.h> 138dcf07beSBart Van Assche #include <net/ipv6.h> /* ipv6_addr_equal() */ 14e48354ceSNicholas Bellinger #include <scsi/scsi_tcq.h> 15e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 16e48354ceSNicholas Bellinger #include <target/target_core_base.h> 17c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 18baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 19e48354ceSNicholas Bellinger 2067f091f2SSagi Grimberg #include <target/iscsi/iscsi_target_core.h> 21e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 22e48354ceSNicholas Bellinger #include "iscsi_target_seq_pdu_list.h" 23e48354ceSNicholas Bellinger #include "iscsi_target_datain_values.h" 24e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 25e48354ceSNicholas Bellinger #include "iscsi_target_erl1.h" 26e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 27e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 28e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 29e48354ceSNicholas Bellinger #include "iscsi_target.h" 30e48354ceSNicholas Bellinger 31e48354ceSNicholas Bellinger extern struct list_head g_tiqn_list; 32e48354ceSNicholas Bellinger extern spinlock_t tiqn_lock; 33e48354ceSNicholas Bellinger 34e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 3566cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 36e48354ceSNicholas Bellinger u32 offset, 37e48354ceSNicholas Bellinger u32 xfer_len, 38e48354ceSNicholas Bellinger int recovery, 39e48354ceSNicholas Bellinger u32 r2t_sn) 40e48354ceSNicholas Bellinger { 41e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 42e48354ceSNicholas Bellinger 43618baaf7SBart Van Assche lockdep_assert_held(&cmd->r2t_lock); 44618baaf7SBart Van Assche 4596e8e26dSBart Van Assche WARN_ON_ONCE((s32)xfer_len < 0); 4696e8e26dSBart Van Assche 47e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 48e48354ceSNicholas Bellinger if (!r2t) { 49e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 50e48354ceSNicholas Bellinger return -1; 51e48354ceSNicholas Bellinger } 52e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 53e48354ceSNicholas Bellinger 54e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 55e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 56e48354ceSNicholas Bellinger r2t->offset = offset; 57e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 58e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 59e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 60e48354ceSNicholas Bellinger 61e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 62e48354ceSNicholas Bellinger 63e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 64e48354ceSNicholas Bellinger return 0; 65e48354ceSNicholas Bellinger } 66e48354ceSNicholas Bellinger 67e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 6866cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 69e48354ceSNicholas Bellinger u32 offset, 70e48354ceSNicholas Bellinger u32 length) 71e48354ceSNicholas Bellinger { 72e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 73e48354ceSNicholas Bellinger 74e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 75e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 76e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 77e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 78e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 79e48354ceSNicholas Bellinger return r2t; 80e48354ceSNicholas Bellinger } 81e48354ceSNicholas Bellinger } 82e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 83e48354ceSNicholas Bellinger 84e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 85e48354ceSNicholas Bellinger " %u\n", offset, length); 86e48354ceSNicholas Bellinger return NULL; 87e48354ceSNicholas Bellinger } 88e48354ceSNicholas Bellinger 8966cd9d4eSMax Gurtovoy struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsit_cmd *cmd) 90e48354ceSNicholas Bellinger { 91e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 92e48354ceSNicholas Bellinger 93e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 94e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 95e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 96e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 97e48354ceSNicholas Bellinger return r2t; 98e48354ceSNicholas Bellinger } 99e48354ceSNicholas Bellinger } 100e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 101e48354ceSNicholas Bellinger 102e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 103e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 104e48354ceSNicholas Bellinger return NULL; 105e48354ceSNicholas Bellinger } 106e48354ceSNicholas Bellinger 10766cd9d4eSMax Gurtovoy void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsit_cmd *cmd) 108e48354ceSNicholas Bellinger { 109618baaf7SBart Van Assche lockdep_assert_held(&cmd->r2t_lock); 110618baaf7SBart Van Assche 111e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 112e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 113e48354ceSNicholas Bellinger } 114e48354ceSNicholas Bellinger 11566cd9d4eSMax Gurtovoy void iscsit_free_r2ts_from_list(struct iscsit_cmd *cmd) 116e48354ceSNicholas Bellinger { 117e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 118e48354ceSNicholas Bellinger 119e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 120e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 121e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 122e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 123e48354ceSNicholas Bellinger } 124e48354ceSNicholas Bellinger 12510e9cbb6SMatthew Wilcox static int iscsit_wait_for_tag(struct se_session *se_sess, int state, int *cpup) 12610e9cbb6SMatthew Wilcox { 12710e9cbb6SMatthew Wilcox int tag = -1; 1285d2ee712SJens Axboe DEFINE_SBQ_WAIT(wait); 12910e9cbb6SMatthew Wilcox struct sbq_wait_state *ws; 1305d2ee712SJens Axboe struct sbitmap_queue *sbq; 13110e9cbb6SMatthew Wilcox 13210e9cbb6SMatthew Wilcox if (state == TASK_RUNNING) 13310e9cbb6SMatthew Wilcox return tag; 13410e9cbb6SMatthew Wilcox 1355d2ee712SJens Axboe sbq = &se_sess->sess_tag_pool; 1365d2ee712SJens Axboe ws = &sbq->ws[0]; 13710e9cbb6SMatthew Wilcox for (;;) { 1385d2ee712SJens Axboe sbitmap_prepare_to_wait(sbq, ws, &wait, state); 13910e9cbb6SMatthew Wilcox if (signal_pending_state(state, current)) 14010e9cbb6SMatthew Wilcox break; 1415d2ee712SJens Axboe tag = sbitmap_queue_get(sbq, cpup); 14210e9cbb6SMatthew Wilcox if (tag >= 0) 14310e9cbb6SMatthew Wilcox break; 14410e9cbb6SMatthew Wilcox schedule(); 14510e9cbb6SMatthew Wilcox } 14610e9cbb6SMatthew Wilcox 1475d2ee712SJens Axboe sbitmap_finish_wait(sbq, ws, &wait); 14810e9cbb6SMatthew Wilcox return tag; 14910e9cbb6SMatthew Wilcox } 15010e9cbb6SMatthew Wilcox 151e48354ceSNicholas Bellinger /* 152e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 153e48354ceSNicholas Bellinger * iSCSI NopINs. 154e48354ceSNicholas Bellinger */ 155be36d683SMax Gurtovoy struct iscsit_cmd *iscsit_allocate_cmd(struct iscsit_conn *conn, int state) 156e48354ceSNicholas Bellinger { 15766cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd; 158988e3a85SNicholas Bellinger struct se_session *se_sess = conn->sess->se_sess; 15910e9cbb6SMatthew Wilcox int size, tag, cpu; 160e48354ceSNicholas Bellinger 16110e9cbb6SMatthew Wilcox tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); 16210e9cbb6SMatthew Wilcox if (tag < 0) 16310e9cbb6SMatthew Wilcox tag = iscsit_wait_for_tag(se_sess, state, &cpu); 1646f6b5d1eSKent Overstreet if (tag < 0) 1656f6b5d1eSKent Overstreet return NULL; 1666f6b5d1eSKent Overstreet 16766cd9d4eSMax Gurtovoy size = sizeof(struct iscsit_cmd) + conn->conn_transport->priv_size; 16866cd9d4eSMax Gurtovoy cmd = (struct iscsit_cmd *)(se_sess->sess_cmd_map + (tag * size)); 169988e3a85SNicholas Bellinger memset(cmd, 0, size); 170988e3a85SNicholas Bellinger 171988e3a85SNicholas Bellinger cmd->se_cmd.map_tag = tag; 17210e9cbb6SMatthew Wilcox cmd->se_cmd.map_cpu = cpu; 173e48354ceSNicholas Bellinger cmd->conn = conn; 1744412a671SBart Van Assche cmd->data_direction = DMA_NONE; 1752fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 176e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 177e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 178e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 179e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 180e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 181e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 182e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 183f7c9564aSKees Cook timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0); 184e48354ceSNicholas Bellinger 185e48354ceSNicholas Bellinger return cmd; 186e48354ceSNicholas Bellinger } 187cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 188e48354ceSNicholas Bellinger 189e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 19066cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 191e48354ceSNicholas Bellinger u32 seq_send_order) 192e48354ceSNicholas Bellinger { 193e48354ceSNicholas Bellinger u32 i; 194e48354ceSNicholas Bellinger 195e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 196e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 197e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 198e48354ceSNicholas Bellinger 199e48354ceSNicholas Bellinger return NULL; 200e48354ceSNicholas Bellinger } 201e48354ceSNicholas Bellinger 20266cd9d4eSMax Gurtovoy struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsit_cmd *cmd) 203e48354ceSNicholas Bellinger { 204e48354ceSNicholas Bellinger u32 i; 205e48354ceSNicholas Bellinger 206e48354ceSNicholas Bellinger if (!cmd->seq_list) { 20766cd9d4eSMax Gurtovoy pr_err("struct iscsit_cmd->seq_list is NULL!\n"); 208e48354ceSNicholas Bellinger return NULL; 209e48354ceSNicholas Bellinger } 210e48354ceSNicholas Bellinger 211e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 212e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 213e48354ceSNicholas Bellinger continue; 214e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 215e48354ceSNicholas Bellinger cmd->seq_send_order++; 216e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 217e48354ceSNicholas Bellinger } 218e48354ceSNicholas Bellinger } 219e48354ceSNicholas Bellinger 220e48354ceSNicholas Bellinger return NULL; 221e48354ceSNicholas Bellinger } 222e48354ceSNicholas Bellinger 223e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 22466cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 225e48354ceSNicholas Bellinger u32 r2t_sn) 226e48354ceSNicholas Bellinger { 227e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 228e48354ceSNicholas Bellinger 229e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 230e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 231e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 232e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 233e48354ceSNicholas Bellinger return r2t; 234e48354ceSNicholas Bellinger } 235e48354ceSNicholas Bellinger } 236e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 237e48354ceSNicholas Bellinger 238e48354ceSNicholas Bellinger return NULL; 239e48354ceSNicholas Bellinger } 240e48354ceSNicholas Bellinger 2410873fe44SMax Gurtovoy static inline int iscsit_check_received_cmdsn(struct iscsit_session *sess, u32 cmdsn) 242e48354ceSNicholas Bellinger { 243109e2381SRoland Dreier u32 max_cmdsn; 244e48354ceSNicholas Bellinger int ret; 245e48354ceSNicholas Bellinger 246e48354ceSNicholas Bellinger /* 247e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 248e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 249e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 250e48354ceSNicholas Bellinger * CRC failures. 251e48354ceSNicholas Bellinger */ 252109e2381SRoland Dreier max_cmdsn = atomic_read(&sess->max_cmd_sn); 253109e2381SRoland Dreier if (iscsi_sna_gt(cmdsn, max_cmdsn)) { 254e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 255109e2381SRoland Dreier " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); 256ea7e32beSNicholas Bellinger ret = CMDSN_MAXCMDSN_OVERRUN; 257e48354ceSNicholas Bellinger 258e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 259e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 260e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 261e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 262e48354ceSNicholas Bellinger sess->exp_cmd_sn); 263e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 264e48354ceSNicholas Bellinger 265e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 266e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 267e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 268e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 269e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 270e48354ceSNicholas Bellinger 271e48354ceSNicholas Bellinger } else { 272e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 273e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 274e48354ceSNicholas Bellinger sess->exp_cmd_sn); 275e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 276e48354ceSNicholas Bellinger } 277e48354ceSNicholas Bellinger 278e48354ceSNicholas Bellinger return ret; 279e48354ceSNicholas Bellinger } 280e48354ceSNicholas Bellinger 281e48354ceSNicholas Bellinger /* 282e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 283e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 284e48354ceSNicholas Bellinger */ 285be36d683SMax Gurtovoy int iscsit_sequence_cmd(struct iscsit_conn *conn, struct iscsit_cmd *cmd, 286561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 287e48354ceSNicholas Bellinger { 288561bf158SNicholas Bellinger int ret, cmdsn_ret; 289561bf158SNicholas Bellinger bool reject = false; 290561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 291e48354ceSNicholas Bellinger 292e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 293e48354ceSNicholas Bellinger 29450e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 295e48354ceSNicholas Bellinger switch (cmdsn_ret) { 296e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 297e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 298e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 299e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 300561bf158SNicholas Bellinger else if (ret < 0) { 301561bf158SNicholas Bellinger reject = true; 302561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 303561bf158SNicholas Bellinger } 304e48354ceSNicholas Bellinger break; 305e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 30650e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 307561bf158SNicholas Bellinger if (ret < 0) { 308561bf158SNicholas Bellinger reject = true; 309561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 310561bf158SNicholas Bellinger break; 311561bf158SNicholas Bellinger } 312561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 313e48354ceSNicholas Bellinger break; 314e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 315ea7e32beSNicholas Bellinger case CMDSN_MAXCMDSN_OVERRUN: 316ea7e32beSNicholas Bellinger default: 317e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 318e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 319ea7e32beSNicholas Bellinger /* 320ea7e32beSNicholas Bellinger * Existing callers for iscsit_sequence_cmd() will silently 321ea7e32beSNicholas Bellinger * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 322ea7e32beSNicholas Bellinger * return for CMDSN_MAXCMDSN_OVERRUN as well.. 323ea7e32beSNicholas Bellinger */ 324ea7e32beSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 325e48354ceSNicholas Bellinger break; 326e48354ceSNicholas Bellinger } 327e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 328e48354ceSNicholas Bellinger 329561bf158SNicholas Bellinger if (reject) 330561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 331561bf158SNicholas Bellinger 332e48354ceSNicholas Bellinger return ret; 333e48354ceSNicholas Bellinger } 3343e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 335e48354ceSNicholas Bellinger 33666cd9d4eSMax Gurtovoy int iscsit_check_unsolicited_dataout(struct iscsit_cmd *cmd, unsigned char *buf) 337e48354ceSNicholas Bellinger { 338be36d683SMax Gurtovoy struct iscsit_conn *conn = cmd->conn; 339e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 340e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 341e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 342e48354ceSNicholas Bellinger 343e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 344e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 345e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 346e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 347e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 348e48354ceSNicholas Bellinger return -1; 349e48354ceSNicholas Bellinger } 350e48354ceSNicholas Bellinger 351e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 352e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 353e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 354e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 355e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 356e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 357e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 358e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 359e48354ceSNicholas Bellinger return -1; 360e48354ceSNicholas Bellinger } 361e48354ceSNicholas Bellinger 362e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 363e48354ceSNicholas Bellinger return 0; 364e48354ceSNicholas Bellinger 365ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 366e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 367e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 368e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 369e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 370e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 371e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 372ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 373e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 374e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 375e48354ceSNicholas Bellinger return -1; 376e48354ceSNicholas Bellinger } 377e48354ceSNicholas Bellinger return 0; 378e48354ceSNicholas Bellinger } 379e48354ceSNicholas Bellinger 38066cd9d4eSMax Gurtovoy struct iscsit_cmd *iscsit_find_cmd_from_itt( 381be36d683SMax Gurtovoy struct iscsit_conn *conn, 38266c7db68SChristoph Hellwig itt_t init_task_tag) 383e48354ceSNicholas Bellinger { 38466cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd; 385e48354ceSNicholas Bellinger 386e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3872fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 388e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 389e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 390e48354ceSNicholas Bellinger return cmd; 391e48354ceSNicholas Bellinger } 392e48354ceSNicholas Bellinger } 393e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 394e48354ceSNicholas Bellinger 395e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 396e48354ceSNicholas Bellinger init_task_tag, conn->cid); 397e48354ceSNicholas Bellinger return NULL; 398e48354ceSNicholas Bellinger } 399e4f4e801SSagi Grimberg EXPORT_SYMBOL(iscsit_find_cmd_from_itt); 400e48354ceSNicholas Bellinger 40166cd9d4eSMax Gurtovoy struct iscsit_cmd *iscsit_find_cmd_from_itt_or_dump( 402be36d683SMax Gurtovoy struct iscsit_conn *conn, 40366c7db68SChristoph Hellwig itt_t init_task_tag, 404e48354ceSNicholas Bellinger u32 length) 405e48354ceSNicholas Bellinger { 40666cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd; 407e48354ceSNicholas Bellinger 408e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4092fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 4103687db88SNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 4113687db88SNicholas Bellinger continue; 412e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 413e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 414e48354ceSNicholas Bellinger return cmd; 415e48354ceSNicholas Bellinger } 416e48354ceSNicholas Bellinger } 417e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 418e48354ceSNicholas Bellinger 419e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 420e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 421e48354ceSNicholas Bellinger if (length) 422e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 423e48354ceSNicholas Bellinger 424e48354ceSNicholas Bellinger return NULL; 425e48354ceSNicholas Bellinger } 4269a584bf9SVarun Prakash EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); 427e48354ceSNicholas Bellinger 42866cd9d4eSMax Gurtovoy struct iscsit_cmd *iscsit_find_cmd_from_ttt( 429be36d683SMax Gurtovoy struct iscsit_conn *conn, 430e48354ceSNicholas Bellinger u32 targ_xfer_tag) 431e48354ceSNicholas Bellinger { 43266cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd = NULL; 433e48354ceSNicholas Bellinger 434e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4352fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 436e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 437e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 438e48354ceSNicholas Bellinger return cmd; 439e48354ceSNicholas Bellinger } 440e48354ceSNicholas Bellinger } 441e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 442e48354ceSNicholas Bellinger 443e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 444e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 445e48354ceSNicholas Bellinger return NULL; 446e48354ceSNicholas Bellinger } 447e48354ceSNicholas Bellinger 448e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 4490873fe44SMax Gurtovoy struct iscsit_session *sess, 45066cd9d4eSMax Gurtovoy struct iscsit_cmd **cmd_ptr, 451e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 45266c7db68SChristoph Hellwig itt_t init_task_tag) 453e48354ceSNicholas Bellinger { 45466cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd = NULL; 455e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 456e48354ceSNicholas Bellinger /* 457e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 458e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 459e48354ceSNicholas Bellinger */ 460e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 461e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 462e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4632fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 464e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 465e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 466e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 467e48354ceSNicholas Bellinger 468e48354ceSNicholas Bellinger *cr_ptr = cr; 469e48354ceSNicholas Bellinger *cmd_ptr = cmd; 470e48354ceSNicholas Bellinger return -2; 471e48354ceSNicholas Bellinger } 472e48354ceSNicholas Bellinger } 473e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 474e48354ceSNicholas Bellinger } 475e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 476e48354ceSNicholas Bellinger /* 477e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 478e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 479e48354ceSNicholas Bellinger */ 480e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 481e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 482e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4832fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 484e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 485e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 486e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 487e48354ceSNicholas Bellinger 488e48354ceSNicholas Bellinger *cr_ptr = cr; 489e48354ceSNicholas Bellinger *cmd_ptr = cmd; 490e48354ceSNicholas Bellinger return 0; 491e48354ceSNicholas Bellinger } 492e48354ceSNicholas Bellinger } 493e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 494e48354ceSNicholas Bellinger } 495e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 496e48354ceSNicholas Bellinger 497e48354ceSNicholas Bellinger return -1; 498e48354ceSNicholas Bellinger } 499e48354ceSNicholas Bellinger 500e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 50166cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 502be36d683SMax Gurtovoy struct iscsit_conn *conn, 503e48354ceSNicholas Bellinger u8 state) 504e48354ceSNicholas Bellinger { 505e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 506e48354ceSNicholas Bellinger 507e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 508e48354ceSNicholas Bellinger if (!qr) { 509e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 510e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 511e48354ceSNicholas Bellinger return; 512e48354ceSNicholas Bellinger } 513e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 514e48354ceSNicholas Bellinger qr->cmd = cmd; 515e48354ceSNicholas Bellinger qr->state = state; 516e48354ceSNicholas Bellinger 517e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 518e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 519e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 520e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 521e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 522e48354ceSNicholas Bellinger 523d5627acbSRoland Dreier wake_up(&conn->queues_wq); 524e48354ceSNicholas Bellinger } 525d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); 526e48354ceSNicholas Bellinger 527be36d683SMax Gurtovoy struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsit_conn *conn) 528e48354ceSNicholas Bellinger { 529e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 530e48354ceSNicholas Bellinger 531e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 532e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 533e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 534e48354ceSNicholas Bellinger return NULL; 535e48354ceSNicholas Bellinger } 5361f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5371f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 538e48354ceSNicholas Bellinger 539e48354ceSNicholas Bellinger list_del(&qr->qr_list); 540e48354ceSNicholas Bellinger if (qr->cmd) 541e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 542e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 543e48354ceSNicholas Bellinger 544e48354ceSNicholas Bellinger return qr; 545e48354ceSNicholas Bellinger } 546e48354ceSNicholas Bellinger 547e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 54866cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 549be36d683SMax Gurtovoy struct iscsit_conn *conn) 550e48354ceSNicholas Bellinger { 551e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 552e48354ceSNicholas Bellinger 553e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 554e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 555e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 556e48354ceSNicholas Bellinger return; 557e48354ceSNicholas Bellinger } 558e48354ceSNicholas Bellinger 559e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 560e48354ceSNicholas Bellinger if (qr->cmd != cmd) 561e48354ceSNicholas Bellinger continue; 562e48354ceSNicholas Bellinger 563e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 564e48354ceSNicholas Bellinger list_del(&qr->qr_list); 565e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 566e48354ceSNicholas Bellinger } 567e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 568e48354ceSNicholas Bellinger 569e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 570e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 571e48354ceSNicholas Bellinger cmd->init_task_tag, 572e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 573e48354ceSNicholas Bellinger } 574e48354ceSNicholas Bellinger } 575e48354ceSNicholas Bellinger 576a4467018SNicholas Bellinger int iscsit_add_cmd_to_response_queue( 57766cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 578be36d683SMax Gurtovoy struct iscsit_conn *conn, 579e48354ceSNicholas Bellinger u8 state) 580e48354ceSNicholas Bellinger { 581e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 582e48354ceSNicholas Bellinger 583e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 584e48354ceSNicholas Bellinger if (!qr) { 585e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 586e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 587a4467018SNicholas Bellinger return -ENOMEM; 588e48354ceSNicholas Bellinger } 589e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 590e48354ceSNicholas Bellinger qr->cmd = cmd; 591e48354ceSNicholas Bellinger qr->state = state; 592e48354ceSNicholas Bellinger 593e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 594e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 595e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 596e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 597e48354ceSNicholas Bellinger 598d5627acbSRoland Dreier wake_up(&conn->queues_wq); 599a4467018SNicholas Bellinger return 0; 600e48354ceSNicholas Bellinger } 601e48354ceSNicholas Bellinger 602be36d683SMax Gurtovoy struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsit_conn *conn) 603e48354ceSNicholas Bellinger { 604e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 605e48354ceSNicholas Bellinger 606e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 607e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 608e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 609e48354ceSNicholas Bellinger return NULL; 610e48354ceSNicholas Bellinger } 611e48354ceSNicholas Bellinger 6121f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6131f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 614e48354ceSNicholas Bellinger 615e48354ceSNicholas Bellinger list_del(&qr->qr_list); 616e48354ceSNicholas Bellinger if (qr->cmd) 617e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 618e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 619e48354ceSNicholas Bellinger 620e48354ceSNicholas Bellinger return qr; 621e48354ceSNicholas Bellinger } 622e48354ceSNicholas Bellinger 623e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 62466cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 625be36d683SMax Gurtovoy struct iscsit_conn *conn) 626e48354ceSNicholas Bellinger { 627e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 628e48354ceSNicholas Bellinger 629e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 630e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 631e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 632e48354ceSNicholas Bellinger return; 633e48354ceSNicholas Bellinger } 634e48354ceSNicholas Bellinger 635e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 636e48354ceSNicholas Bellinger qr_list) { 637e48354ceSNicholas Bellinger if (qr->cmd != cmd) 638e48354ceSNicholas Bellinger continue; 639e48354ceSNicholas Bellinger 640e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 641e48354ceSNicholas Bellinger list_del(&qr->qr_list); 642e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 643e48354ceSNicholas Bellinger } 644e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 645e48354ceSNicholas Bellinger 646e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 647e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 648e48354ceSNicholas Bellinger cmd->init_task_tag, 649e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 650e48354ceSNicholas Bellinger } 651e48354ceSNicholas Bellinger } 652e48354ceSNicholas Bellinger 653be36d683SMax Gurtovoy bool iscsit_conn_all_queues_empty(struct iscsit_conn *conn) 654d5627acbSRoland Dreier { 655d5627acbSRoland Dreier bool empty; 656d5627acbSRoland Dreier 657d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 658d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 659d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 660d5627acbSRoland Dreier 661d5627acbSRoland Dreier if (!empty) 662d5627acbSRoland Dreier return empty; 663d5627acbSRoland Dreier 664d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 665d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 666d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 667d5627acbSRoland Dreier 668d5627acbSRoland Dreier return empty; 669d5627acbSRoland Dreier } 670d5627acbSRoland Dreier 671be36d683SMax Gurtovoy void iscsit_free_queue_reqs_for_conn(struct iscsit_conn *conn) 672e48354ceSNicholas Bellinger { 673e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 674e48354ceSNicholas Bellinger 675e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 676e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 677e48354ceSNicholas Bellinger list_del(&qr->qr_list); 678e48354ceSNicholas Bellinger if (qr->cmd) 679e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 680e48354ceSNicholas Bellinger 681e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 682e48354ceSNicholas Bellinger } 683e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 684e48354ceSNicholas Bellinger 685e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 686e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 687e48354ceSNicholas Bellinger qr_list) { 688e48354ceSNicholas Bellinger list_del(&qr->qr_list); 689e48354ceSNicholas Bellinger if (qr->cmd) 690e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 691e48354ceSNicholas Bellinger 692e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 693e48354ceSNicholas Bellinger } 694e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 695e48354ceSNicholas Bellinger } 696e48354ceSNicholas Bellinger 69766cd9d4eSMax Gurtovoy void iscsit_release_cmd(struct iscsit_cmd *cmd) 698e48354ceSNicholas Bellinger { 6990873fe44SMax Gurtovoy struct iscsit_session *sess; 700988e3a85SNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 701988e3a85SNicholas Bellinger 7026eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 7036eaf69e4SBart Van Assche 704988e3a85SNicholas Bellinger if (cmd->conn) 705988e3a85SNicholas Bellinger sess = cmd->conn->sess; 706988e3a85SNicholas Bellinger else 707988e3a85SNicholas Bellinger sess = cmd->sess; 708988e3a85SNicholas Bellinger 709988e3a85SNicholas Bellinger BUG_ON(!sess || !sess->se_sess); 710988e3a85SNicholas Bellinger 711e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 712e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 713e48354ceSNicholas Bellinger kfree(cmd->seq_list); 714e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 7150ca650c1SBart Van Assche kfree(cmd->overflow_buf); 716e48354ceSNicholas Bellinger kfree(cmd->iov_data); 7179864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 718e48354ceSNicholas Bellinger 71983c2b54bSMatthew Wilcox target_free_tag(sess->se_sess, se_cmd); 720e48354ceSNicholas Bellinger } 721d703ce2fSNicholas Bellinger EXPORT_SYMBOL(iscsit_release_cmd); 722e48354ceSNicholas Bellinger 72366cd9d4eSMax Gurtovoy void __iscsit_free_cmd(struct iscsit_cmd *cmd, bool check_queues) 724d270190aSNicholas Bellinger { 725be36d683SMax Gurtovoy struct iscsit_conn *conn = cmd->conn; 726aafc9d15SNicholas Bellinger 7276eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 7286eaf69e4SBart Van Assche 729aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 730aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 731aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 732aafc9d15SNicholas Bellinger } 733aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 734aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 735aafc9d15SNicholas Bellinger 736aafc9d15SNicholas Bellinger if (conn && check_queues) { 737aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 738aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 739aafc9d15SNicholas Bellinger } 7407ec811a8SVarun Prakash 7411e65cc16SBart Van Assche if (conn && conn->conn_transport->iscsit_unmap_cmd) 7421e65cc16SBart Van Assche conn->conn_transport->iscsit_unmap_cmd(conn, cmd); 743aafc9d15SNicholas Bellinger } 744aafc9d15SNicholas Bellinger 74566cd9d4eSMax Gurtovoy void iscsit_free_cmd(struct iscsit_cmd *cmd, bool shutdown) 746aafc9d15SNicholas Bellinger { 747d1c26857SBart Van Assche struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL; 748aafc9d15SNicholas Bellinger int rc; 7494412a671SBart Van Assche 750b0055acaSBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 751b0055acaSBart Van Assche 7524412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 753d1c26857SBart Van Assche if (se_cmd) { 754efb2ea77SNicholas Bellinger rc = transport_generic_free_cmd(se_cmd, shutdown); 755c8a75afbSBart Van Assche if (!rc && shutdown && se_cmd->se_sess) { 756c8a75afbSBart Van Assche __iscsit_free_cmd(cmd, shutdown); 757afc16604SBart Van Assche target_put_sess_cmd(se_cmd); 758c8a75afbSBart Van Assche } 759d1c26857SBart Van Assche } else { 760d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 761d270190aSNicholas Bellinger } 762d270190aSNicholas Bellinger } 763d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_free_cmd); 764d270190aSNicholas Bellinger 7650873fe44SMax Gurtovoy bool iscsit_check_session_usage_count(struct iscsit_session *sess, 766f88a10f8SSebastian Andrzej Siewior bool can_sleep) 767e48354ceSNicholas Bellinger { 768e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 769e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 770e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 771e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 772efc9d730SSebastian Andrzej Siewior if (!can_sleep) 773f88a10f8SSebastian Andrzej Siewior return true; 774e48354ceSNicholas Bellinger 775e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 776f88a10f8SSebastian Andrzej Siewior return false; 777e48354ceSNicholas Bellinger } 778e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 779e48354ceSNicholas Bellinger 780f88a10f8SSebastian Andrzej Siewior return false; 781e48354ceSNicholas Bellinger } 782e48354ceSNicholas Bellinger 7830873fe44SMax Gurtovoy void iscsit_dec_session_usage_count(struct iscsit_session *sess) 784e48354ceSNicholas Bellinger { 785e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 786e48354ceSNicholas Bellinger sess->session_usage_count--; 787e48354ceSNicholas Bellinger 788e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 789e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 790e48354ceSNicholas Bellinger 791e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 792e48354ceSNicholas Bellinger } 793e48354ceSNicholas Bellinger 7940873fe44SMax Gurtovoy void iscsit_inc_session_usage_count(struct iscsit_session *sess) 795e48354ceSNicholas Bellinger { 796e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 797e48354ceSNicholas Bellinger sess->session_usage_count++; 798e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 799e48354ceSNicholas Bellinger } 800e48354ceSNicholas Bellinger 8010873fe44SMax Gurtovoy struct iscsit_conn *iscsit_get_conn_from_cid(struct iscsit_session *sess, u16 cid) 802e48354ceSNicholas Bellinger { 803be36d683SMax Gurtovoy struct iscsit_conn *conn; 804e48354ceSNicholas Bellinger 805e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 806e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 807e48354ceSNicholas Bellinger if ((conn->cid == cid) && 808e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 809e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 810e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 811e48354ceSNicholas Bellinger return conn; 812e48354ceSNicholas Bellinger } 813e48354ceSNicholas Bellinger } 814e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 815e48354ceSNicholas Bellinger 816e48354ceSNicholas Bellinger return NULL; 817e48354ceSNicholas Bellinger } 818e48354ceSNicholas Bellinger 8190873fe44SMax Gurtovoy struct iscsit_conn *iscsit_get_conn_from_cid_rcfr(struct iscsit_session *sess, u16 cid) 820e48354ceSNicholas Bellinger { 821be36d683SMax Gurtovoy struct iscsit_conn *conn; 822e48354ceSNicholas Bellinger 823e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 824e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 825e48354ceSNicholas Bellinger if (conn->cid == cid) { 826e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 827e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 828e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 829e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 830e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 831e48354ceSNicholas Bellinger return conn; 832e48354ceSNicholas Bellinger } 833e48354ceSNicholas Bellinger } 834e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 835e48354ceSNicholas Bellinger 836e48354ceSNicholas Bellinger return NULL; 837e48354ceSNicholas Bellinger } 838e48354ceSNicholas Bellinger 839be36d683SMax Gurtovoy void iscsit_check_conn_usage_count(struct iscsit_conn *conn) 840e48354ceSNicholas Bellinger { 841e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 842e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 843e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 844e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 845e48354ceSNicholas Bellinger 846e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 847e48354ceSNicholas Bellinger return; 848e48354ceSNicholas Bellinger } 849e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 850e48354ceSNicholas Bellinger } 851e48354ceSNicholas Bellinger 852be36d683SMax Gurtovoy void iscsit_dec_conn_usage_count(struct iscsit_conn *conn) 853e48354ceSNicholas Bellinger { 854e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 855e48354ceSNicholas Bellinger conn->conn_usage_count--; 856e48354ceSNicholas Bellinger 857e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 858e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 859e48354ceSNicholas Bellinger 860e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 861e48354ceSNicholas Bellinger } 862e48354ceSNicholas Bellinger 863be36d683SMax Gurtovoy void iscsit_inc_conn_usage_count(struct iscsit_conn *conn) 864e48354ceSNicholas Bellinger { 865e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 866e48354ceSNicholas Bellinger conn->conn_usage_count++; 867e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 868e48354ceSNicholas Bellinger } 869e48354ceSNicholas Bellinger 870be36d683SMax Gurtovoy static int iscsit_add_nopin(struct iscsit_conn *conn, int want_response) 871e48354ceSNicholas Bellinger { 872e48354ceSNicholas Bellinger u8 state; 87366cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd; 874e48354ceSNicholas Bellinger 875676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 876e48354ceSNicholas Bellinger if (!cmd) 877e48354ceSNicholas Bellinger return -1; 878e48354ceSNicholas Bellinger 879e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 880e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 881e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 88266c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 883c1e34b64SSagi Grimberg cmd->targ_xfer_tag = (want_response) ? 884c1e34b64SSagi Grimberg session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 885e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 8862fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 887e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 888e48354ceSNicholas Bellinger 889e48354ceSNicholas Bellinger if (want_response) 890e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 891e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 892e48354ceSNicholas Bellinger 893e48354ceSNicholas Bellinger return 0; 894e48354ceSNicholas Bellinger } 895e48354ceSNicholas Bellinger 896f7c9564aSKees Cook void iscsit_handle_nopin_response_timeout(struct timer_list *t) 897e48354ceSNicholas Bellinger { 898be36d683SMax Gurtovoy struct iscsit_conn *conn = from_timer(conn, t, nopin_response_timer); 8990873fe44SMax Gurtovoy struct iscsit_session *sess = conn->sess; 900e48354ceSNicholas Bellinger 901e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 902e48354ceSNicholas Bellinger 903e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 904e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 905e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 906e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 907e48354ceSNicholas Bellinger return; 908e48354ceSNicholas Bellinger } 909e48354ceSNicholas Bellinger 910c62ae300SDavid Disseldorp pr_err("Did not receive response to NOPIN on CID: %hu, failing" 911c62ae300SDavid Disseldorp " connection for I_T Nexus %s,i,0x%6phN,%s,t,0x%02x\n", 912c62ae300SDavid Disseldorp conn->cid, sess->sess_ops->InitiatorName, sess->isid, 913c62ae300SDavid Disseldorp sess->tpg->tpg_tiqn->tiqn, (u32)sess->tpg->tpgt); 914e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 915e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 916e48354ceSNicholas Bellinger 917dce6190cSDavid Disseldorp iscsit_fill_cxn_timeout_err_stats(sess); 918e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 919e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 920e48354ceSNicholas Bellinger } 921e48354ceSNicholas Bellinger 922be36d683SMax Gurtovoy void iscsit_mod_nopin_response_timer(struct iscsit_conn *conn) 923e48354ceSNicholas Bellinger { 9240873fe44SMax Gurtovoy struct iscsit_session *sess = conn->sess; 925e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 926e48354ceSNicholas Bellinger 927e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 928e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 929e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 930e48354ceSNicholas Bellinger return; 931e48354ceSNicholas Bellinger } 932e48354ceSNicholas Bellinger 933e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 934e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 935e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 936e48354ceSNicholas Bellinger } 937e48354ceSNicholas Bellinger 938be36d683SMax Gurtovoy void iscsit_start_nopin_response_timer(struct iscsit_conn *conn) 939e48354ceSNicholas Bellinger { 9400873fe44SMax Gurtovoy struct iscsit_session *sess = conn->sess; 941e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 942e48354ceSNicholas Bellinger 943e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 944e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 945e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 946e48354ceSNicholas Bellinger return; 947e48354ceSNicholas Bellinger } 948e48354ceSNicholas Bellinger 949e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 950e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 9518a47aa9dSBart Van Assche mod_timer(&conn->nopin_response_timer, 9528a47aa9dSBart Van Assche jiffies + na->nopin_response_timeout * HZ); 953e48354ceSNicholas Bellinger 954e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 955e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 956e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 957e48354ceSNicholas Bellinger } 958e48354ceSNicholas Bellinger 959be36d683SMax Gurtovoy void iscsit_stop_nopin_response_timer(struct iscsit_conn *conn) 960e48354ceSNicholas Bellinger { 961e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 962e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 963e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 964e48354ceSNicholas Bellinger return; 965e48354ceSNicholas Bellinger } 966e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 967e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 968e48354ceSNicholas Bellinger 969e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 970e48354ceSNicholas Bellinger 971e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 972e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 973e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 974e48354ceSNicholas Bellinger } 975e48354ceSNicholas Bellinger 976f7c9564aSKees Cook void iscsit_handle_nopin_timeout(struct timer_list *t) 977e48354ceSNicholas Bellinger { 978be36d683SMax Gurtovoy struct iscsit_conn *conn = from_timer(conn, t, nopin_timer); 979e48354ceSNicholas Bellinger 980e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 981e48354ceSNicholas Bellinger 982e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 983e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 984e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 985e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 986e48354ceSNicholas Bellinger return; 987e48354ceSNicholas Bellinger } 988e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 989e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 990e48354ceSNicholas Bellinger 991e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 992e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 993e48354ceSNicholas Bellinger } 994e48354ceSNicholas Bellinger 995be36d683SMax Gurtovoy void __iscsit_start_nopin_timer(struct iscsit_conn *conn) 996e48354ceSNicholas Bellinger { 9970873fe44SMax Gurtovoy struct iscsit_session *sess = conn->sess; 998e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 999618baaf7SBart Van Assche 1000618baaf7SBart Van Assche lockdep_assert_held(&conn->nopin_timer_lock); 1001618baaf7SBart Van Assche 1002e48354ceSNicholas Bellinger /* 1003e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1004e48354ceSNicholas Bellinger */ 1005e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1006e48354ceSNicholas Bellinger return; 1007e48354ceSNicholas Bellinger 1008e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1009e48354ceSNicholas Bellinger return; 1010e48354ceSNicholas Bellinger 1011e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1012e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 10138a47aa9dSBart Van Assche mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 1014e48354ceSNicholas Bellinger 1015e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1016e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1017e48354ceSNicholas Bellinger } 1018e48354ceSNicholas Bellinger 1019be36d683SMax Gurtovoy void iscsit_start_nopin_timer(struct iscsit_conn *conn) 1020e48354ceSNicholas Bellinger { 1021e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1022aeb50279SMike Christie __iscsit_start_nopin_timer(conn); 1023e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1024e48354ceSNicholas Bellinger } 1025e48354ceSNicholas Bellinger 1026be36d683SMax Gurtovoy void iscsit_stop_nopin_timer(struct iscsit_conn *conn) 1027e48354ceSNicholas Bellinger { 1028e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1029e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1030e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1031e48354ceSNicholas Bellinger return; 1032e48354ceSNicholas Bellinger } 1033e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1034e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1035e48354ceSNicholas Bellinger 1036e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1037e48354ceSNicholas Bellinger 1038e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1039e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1040e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1041e48354ceSNicholas Bellinger } 1042e48354ceSNicholas Bellinger 1043e48354ceSNicholas Bellinger int iscsit_send_tx_data( 104466cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 1045be36d683SMax Gurtovoy struct iscsit_conn *conn, 1046e48354ceSNicholas Bellinger int use_misc) 1047e48354ceSNicholas Bellinger { 1048e48354ceSNicholas Bellinger int tx_sent, tx_size; 1049e48354ceSNicholas Bellinger u32 iov_count; 1050e48354ceSNicholas Bellinger struct kvec *iov; 1051e48354ceSNicholas Bellinger 1052e48354ceSNicholas Bellinger send_data: 1053e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1054e48354ceSNicholas Bellinger 1055e48354ceSNicholas Bellinger if (!use_misc) { 1056e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1057e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1058e48354ceSNicholas Bellinger } else { 1059e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1060e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1061e48354ceSNicholas Bellinger } 1062e48354ceSNicholas Bellinger 1063e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1064e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1065e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1066e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1067e48354ceSNicholas Bellinger goto send_data; 1068e48354ceSNicholas Bellinger } else 1069e48354ceSNicholas Bellinger return -1; 1070e48354ceSNicholas Bellinger } 1071e48354ceSNicholas Bellinger cmd->tx_size = 0; 1072e48354ceSNicholas Bellinger 1073e48354ceSNicholas Bellinger return 0; 1074e48354ceSNicholas Bellinger } 1075e48354ceSNicholas Bellinger 1076e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 107766cd9d4eSMax Gurtovoy struct iscsit_cmd *cmd, 1078be36d683SMax Gurtovoy struct iscsit_conn *conn) 1079e48354ceSNicholas Bellinger { 1080e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1081e48354ceSNicholas Bellinger struct kvec iov; 1082e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1083e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 108440b05497SNicholas Bellinger int tx_sent, iov_off; 1085e48354ceSNicholas Bellinger 1086e48354ceSNicholas Bellinger send_hdr: 1087e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1088e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1089e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1090e48354ceSNicholas Bellinger 1091e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1092e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1093e48354ceSNicholas Bellinger 1094e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1095e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1096e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1097e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1098e48354ceSNicholas Bellinger goto send_hdr; 1099e48354ceSNicholas Bellinger } 1100e48354ceSNicholas Bellinger return -1; 1101e48354ceSNicholas Bellinger } 1102e48354ceSNicholas Bellinger 1103e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 110440b05497SNicholas Bellinger /* 110540b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 110640b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 110740b05497SNicholas Bellinger */ 110840b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1109e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 111040b05497SNicholas Bellinger if (cmd->padding) 111140b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 111240b05497SNicholas Bellinger else 111340b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 111440b05497SNicholas Bellinger } else { 111540b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 111640b05497SNicholas Bellinger } 1117e48354ceSNicholas Bellinger /* 1118e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1119e48354ceSNicholas Bellinger */ 1120e48354ceSNicholas Bellinger while (data_len) { 1121e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1122e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1123e48354ceSNicholas Bellinger send_pg: 1124e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1125e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1126e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1127e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1128e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1129e48354ceSNicholas Bellinger " -EAGAIN\n"); 1130e48354ceSNicholas Bellinger goto send_pg; 1131e48354ceSNicholas Bellinger } 1132e48354ceSNicholas Bellinger 1133e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1134e48354ceSNicholas Bellinger tx_sent); 1135e48354ceSNicholas Bellinger return -1; 1136e48354ceSNicholas Bellinger } 1137e48354ceSNicholas Bellinger 1138e48354ceSNicholas Bellinger data_len -= sub_len; 1139e48354ceSNicholas Bellinger offset = 0; 1140e48354ceSNicholas Bellinger sg = sg_next(sg); 1141e48354ceSNicholas Bellinger } 1142e48354ceSNicholas Bellinger 1143e48354ceSNicholas Bellinger send_padding: 1144e48354ceSNicholas Bellinger if (cmd->padding) { 114540b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1146e48354ceSNicholas Bellinger 1147e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1148e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1149e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1150e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1151e48354ceSNicholas Bellinger goto send_padding; 1152e48354ceSNicholas Bellinger } 1153e48354ceSNicholas Bellinger return -1; 1154e48354ceSNicholas Bellinger } 1155e48354ceSNicholas Bellinger } 1156e48354ceSNicholas Bellinger 1157e48354ceSNicholas Bellinger send_datacrc: 1158e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 115940b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1160e48354ceSNicholas Bellinger 1161e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1162e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1163e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1164e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1165e48354ceSNicholas Bellinger goto send_datacrc; 1166e48354ceSNicholas Bellinger } 1167e48354ceSNicholas Bellinger return -1; 1168e48354ceSNicholas Bellinger } 1169e48354ceSNicholas Bellinger } 1170e48354ceSNicholas Bellinger 1171e48354ceSNicholas Bellinger return 0; 1172e48354ceSNicholas Bellinger } 1173e48354ceSNicholas Bellinger 1174e48354ceSNicholas Bellinger /* 1175e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1176e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1177e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1178e48354ceSNicholas Bellinger * 1179e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1180e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1181e48354ceSNicholas Bellinger */ 1182be36d683SMax Gurtovoy int iscsit_tx_login_rsp(struct iscsit_conn *conn, u8 status_class, u8 status_detail) 1183e48354ceSNicholas Bellinger { 1184e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1185baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1186e48354ceSNicholas Bellinger 1187baa4d64bSNicholas Bellinger login->login_failed = 1; 1188e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1189e48354ceSNicholas Bellinger 119068349756SNicholas Bellinger memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 119168349756SNicholas Bellinger 1192baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1193e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1194e48354ceSNicholas Bellinger hdr->status_class = status_class; 1195e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 119666c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1197e48354ceSNicholas Bellinger 1198baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1199e48354ceSNicholas Bellinger } 1200e48354ceSNicholas Bellinger 12010873fe44SMax Gurtovoy void iscsit_print_session_params(struct iscsit_session *sess) 1202e48354ceSNicholas Bellinger { 1203be36d683SMax Gurtovoy struct iscsit_conn *conn; 1204e48354ceSNicholas Bellinger 1205e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1206e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1207e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1208e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1209e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1210e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1211e48354ceSNicholas Bellinger 1212e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1213e48354ceSNicholas Bellinger } 1214e48354ceSNicholas Bellinger 12157c59daceSMaurizio Lombardi int rx_data( 1216be36d683SMax Gurtovoy struct iscsit_conn *conn, 12177c59daceSMaurizio Lombardi struct kvec *iov, 12187c59daceSMaurizio Lombardi int iov_count, 12197c59daceSMaurizio Lombardi int data) 1220e48354ceSNicholas Bellinger { 12217c59daceSMaurizio Lombardi int rx_loop = 0, total_rx = 0; 1222e48354ceSNicholas Bellinger struct msghdr msg; 1223e48354ceSNicholas Bellinger 1224e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1225e48354ceSNicholas Bellinger return -1; 1226e48354ceSNicholas Bellinger 1227e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1228*de4eda9dSAl Viro iov_iter_kvec(&msg.msg_iter, ITER_DEST, iov, iov_count, data); 1229e48354ceSNicholas Bellinger 12302da62906SAl Viro while (msg_data_left(&msg)) { 12312da62906SAl Viro rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1232e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1233e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1234e48354ceSNicholas Bellinger rx_loop, total_rx); 1235e48354ceSNicholas Bellinger return rx_loop; 1236e48354ceSNicholas Bellinger } 1237e48354ceSNicholas Bellinger total_rx += rx_loop; 1238e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1239e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1240e48354ceSNicholas Bellinger } 1241e48354ceSNicholas Bellinger 1242e48354ceSNicholas Bellinger return total_rx; 1243e48354ceSNicholas Bellinger } 1244e48354ceSNicholas Bellinger 1245e48354ceSNicholas Bellinger int tx_data( 1246be36d683SMax Gurtovoy struct iscsit_conn *conn, 1247e48354ceSNicholas Bellinger struct kvec *iov, 1248e48354ceSNicholas Bellinger int iov_count, 1249e48354ceSNicholas Bellinger int data) 1250e48354ceSNicholas Bellinger { 12514113e47bSAl Viro struct msghdr msg; 12524113e47bSAl Viro int total_tx = 0; 1253e48354ceSNicholas Bellinger 1254e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1255e48354ceSNicholas Bellinger return -1; 1256e48354ceSNicholas Bellinger 12574113e47bSAl Viro if (data <= 0) { 12584113e47bSAl Viro pr_err("Data length is: %d\n", data); 12594113e47bSAl Viro return -1; 12604113e47bSAl Viro } 1261e48354ceSNicholas Bellinger 12624113e47bSAl Viro memset(&msg, 0, sizeof(struct msghdr)); 12634113e47bSAl Viro 1264*de4eda9dSAl Viro iov_iter_kvec(&msg.msg_iter, ITER_SOURCE, iov, iov_count, data); 12654113e47bSAl Viro 12664113e47bSAl Viro while (msg_data_left(&msg)) { 12674113e47bSAl Viro int tx_loop = sock_sendmsg(conn->sock, &msg); 12684113e47bSAl Viro if (tx_loop <= 0) { 12694113e47bSAl Viro pr_debug("tx_loop: %d total_tx %d\n", 12704113e47bSAl Viro tx_loop, total_tx); 12714113e47bSAl Viro return tx_loop; 12724113e47bSAl Viro } 12734113e47bSAl Viro total_tx += tx_loop; 12744113e47bSAl Viro pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 12754113e47bSAl Viro tx_loop, total_tx, data); 12764113e47bSAl Viro } 12774113e47bSAl Viro 12784113e47bSAl Viro return total_tx; 1279e48354ceSNicholas Bellinger } 1280e48354ceSNicholas Bellinger 1281e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1282be36d683SMax Gurtovoy struct iscsit_conn *conn, 1283e48354ceSNicholas Bellinger u8 status_class, 1284e48354ceSNicholas Bellinger u8 status_detail) 1285e48354ceSNicholas Bellinger { 1286e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1287e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1288e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1289e48354ceSNicholas Bellinger 1290e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1291e48354ceSNicholas Bellinger if (!tiqn) 1292e48354ceSNicholas Bellinger return; 1293e48354ceSNicholas Bellinger 1294e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1295e48354ceSNicholas Bellinger 1296e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1297e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1298e48354ceSNicholas Bellinger ls->accepts++; 1299e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1300e48354ceSNicholas Bellinger ls->redirects++; 1301e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1302e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1303e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1304e48354ceSNicholas Bellinger ls->authenticate_fails++; 1305e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1306e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1307e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1308e48354ceSNicholas Bellinger ls->authorize_fails++; 1309e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1310e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1311e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1312e48354ceSNicholas Bellinger ls->negotiate_fails++; 1313e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1314e48354ceSNicholas Bellinger } else { 1315e48354ceSNicholas Bellinger ls->other_fails++; 1316e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1317e48354ceSNicholas Bellinger } 1318e48354ceSNicholas Bellinger 1319e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1320e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1321e48354ceSNicholas Bellinger if (conn->param_list) 1322e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1323e48354ceSNicholas Bellinger conn->param_list); 1324fdc84d11SJoern Engel strlcpy(ls->last_intr_fail_name, 1325fdc84d11SJoern Engel (intrname ? intrname->value : "Unknown"), 1326fdc84d11SJoern Engel sizeof(ls->last_intr_fail_name)); 1327e48354ceSNicholas Bellinger 1328baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1329baa4d64bSNicholas Bellinger 1330dc58f760SAndy Grover ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1331e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1332e48354ceSNicholas Bellinger } 1333e48354ceSNicholas Bellinger 1334e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1335e48354ceSNicholas Bellinger } 1336e48354ceSNicholas Bellinger 1337be36d683SMax Gurtovoy struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsit_conn *conn) 1338e48354ceSNicholas Bellinger { 1339e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1340e48354ceSNicholas Bellinger 134117c61ad6SNicholas Bellinger if (!conn) 1342e48354ceSNicholas Bellinger return NULL; 1343e48354ceSNicholas Bellinger 134417c61ad6SNicholas Bellinger tpg = conn->tpg; 1345e48354ceSNicholas Bellinger if (!tpg) 1346e48354ceSNicholas Bellinger return NULL; 1347e48354ceSNicholas Bellinger 1348e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1349e48354ceSNicholas Bellinger return NULL; 1350e48354ceSNicholas Bellinger 1351e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1352e48354ceSNicholas Bellinger } 1353dce6190cSDavid Disseldorp 13540873fe44SMax Gurtovoy void iscsit_fill_cxn_timeout_err_stats(struct iscsit_session *sess) 1355dce6190cSDavid Disseldorp { 1356dce6190cSDavid Disseldorp struct iscsi_portal_group *tpg = sess->tpg; 1357dce6190cSDavid Disseldorp struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 1358dce6190cSDavid Disseldorp 1359dce6190cSDavid Disseldorp if (!tiqn) 1360dce6190cSDavid Disseldorp return; 1361dce6190cSDavid Disseldorp 1362dce6190cSDavid Disseldorp spin_lock_bh(&tiqn->sess_err_stats.lock); 1363dce6190cSDavid Disseldorp strlcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 1364dce6190cSDavid Disseldorp sess->sess_ops->InitiatorName, 1365dce6190cSDavid Disseldorp sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name)); 1366dce6190cSDavid Disseldorp tiqn->sess_err_stats.last_sess_failure_type = 1367dce6190cSDavid Disseldorp ISCSI_SESS_ERR_CXN_TIMEOUT; 1368dce6190cSDavid Disseldorp tiqn->sess_err_stats.cxn_timeout_errors++; 1369dce6190cSDavid Disseldorp atomic_long_inc(&sess->conn_timeout_errors); 1370dce6190cSDavid Disseldorp spin_unlock_bh(&tiqn->sess_err_stats.lock); 1371dce6190cSDavid Disseldorp } 1372