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> 2010e9cbb6SMatthew Wilcox #include <linux/sched/signal.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 int iscsit_add_r2t_to_list( 60e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 61e48354ceSNicholas Bellinger u32 offset, 62e48354ceSNicholas Bellinger u32 xfer_len, 63e48354ceSNicholas Bellinger int recovery, 64e48354ceSNicholas Bellinger u32 r2t_sn) 65e48354ceSNicholas Bellinger { 66e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 67e48354ceSNicholas Bellinger 68618baaf7SBart Van Assche lockdep_assert_held(&cmd->r2t_lock); 69618baaf7SBart Van Assche 7096e8e26dSBart Van Assche WARN_ON_ONCE((s32)xfer_len < 0); 7196e8e26dSBart Van Assche 72e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 73e48354ceSNicholas Bellinger if (!r2t) { 74e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 75e48354ceSNicholas Bellinger return -1; 76e48354ceSNicholas Bellinger } 77e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 78e48354ceSNicholas Bellinger 79e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 80e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 81e48354ceSNicholas Bellinger r2t->offset = offset; 82e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 83e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 84e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 85e48354ceSNicholas Bellinger 86e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 87e48354ceSNicholas Bellinger 88e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 89e48354ceSNicholas Bellinger return 0; 90e48354ceSNicholas Bellinger } 91e48354ceSNicholas Bellinger 92e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 93e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 94e48354ceSNicholas Bellinger u32 offset, 95e48354ceSNicholas Bellinger u32 length) 96e48354ceSNicholas Bellinger { 97e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 98e48354ceSNicholas Bellinger 99e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 100e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 101e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 102e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 103e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 104e48354ceSNicholas Bellinger return r2t; 105e48354ceSNicholas Bellinger } 106e48354ceSNicholas Bellinger } 107e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 108e48354ceSNicholas Bellinger 109e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 110e48354ceSNicholas Bellinger " %u\n", offset, length); 111e48354ceSNicholas Bellinger return NULL; 112e48354ceSNicholas Bellinger } 113e48354ceSNicholas Bellinger 114e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 115e48354ceSNicholas Bellinger { 116e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 117e48354ceSNicholas Bellinger 118e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 119e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 120e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 121e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 122e48354ceSNicholas Bellinger return r2t; 123e48354ceSNicholas Bellinger } 124e48354ceSNicholas Bellinger } 125e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 126e48354ceSNicholas Bellinger 127e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 128e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 129e48354ceSNicholas Bellinger return NULL; 130e48354ceSNicholas Bellinger } 131e48354ceSNicholas Bellinger 132e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 133e48354ceSNicholas Bellinger { 134618baaf7SBart Van Assche lockdep_assert_held(&cmd->r2t_lock); 135618baaf7SBart Van Assche 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 15010e9cbb6SMatthew Wilcox static int iscsit_wait_for_tag(struct se_session *se_sess, int state, int *cpup) 15110e9cbb6SMatthew Wilcox { 15210e9cbb6SMatthew Wilcox int tag = -1; 1535d2ee712SJens Axboe DEFINE_SBQ_WAIT(wait); 15410e9cbb6SMatthew Wilcox struct sbq_wait_state *ws; 1555d2ee712SJens Axboe struct sbitmap_queue *sbq; 15610e9cbb6SMatthew Wilcox 15710e9cbb6SMatthew Wilcox if (state == TASK_RUNNING) 15810e9cbb6SMatthew Wilcox return tag; 15910e9cbb6SMatthew Wilcox 1605d2ee712SJens Axboe sbq = &se_sess->sess_tag_pool; 1615d2ee712SJens Axboe ws = &sbq->ws[0]; 16210e9cbb6SMatthew Wilcox for (;;) { 1635d2ee712SJens Axboe sbitmap_prepare_to_wait(sbq, ws, &wait, state); 16410e9cbb6SMatthew Wilcox if (signal_pending_state(state, current)) 16510e9cbb6SMatthew Wilcox break; 1665d2ee712SJens Axboe tag = sbitmap_queue_get(sbq, cpup); 16710e9cbb6SMatthew Wilcox if (tag >= 0) 16810e9cbb6SMatthew Wilcox break; 16910e9cbb6SMatthew Wilcox schedule(); 17010e9cbb6SMatthew Wilcox } 17110e9cbb6SMatthew Wilcox 1725d2ee712SJens Axboe sbitmap_finish_wait(sbq, ws, &wait); 17310e9cbb6SMatthew Wilcox return tag; 17410e9cbb6SMatthew Wilcox } 17510e9cbb6SMatthew Wilcox 176e48354ceSNicholas Bellinger /* 177e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 178e48354ceSNicholas Bellinger * iSCSI NopINs. 179e48354ceSNicholas Bellinger */ 180676687c6SNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) 181e48354ceSNicholas Bellinger { 182e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 183988e3a85SNicholas Bellinger struct se_session *se_sess = conn->sess->se_sess; 18410e9cbb6SMatthew Wilcox int size, tag, cpu; 185e48354ceSNicholas Bellinger 18610e9cbb6SMatthew Wilcox tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); 18710e9cbb6SMatthew Wilcox if (tag < 0) 18810e9cbb6SMatthew Wilcox tag = iscsit_wait_for_tag(se_sess, state, &cpu); 1896f6b5d1eSKent Overstreet if (tag < 0) 1906f6b5d1eSKent Overstreet return NULL; 1916f6b5d1eSKent Overstreet 192988e3a85SNicholas Bellinger size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; 193988e3a85SNicholas Bellinger cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); 194988e3a85SNicholas Bellinger memset(cmd, 0, size); 195988e3a85SNicholas Bellinger 196988e3a85SNicholas Bellinger cmd->se_cmd.map_tag = tag; 19710e9cbb6SMatthew Wilcox cmd->se_cmd.map_cpu = cpu; 198e48354ceSNicholas Bellinger cmd->conn = conn; 1994412a671SBart Van Assche cmd->data_direction = DMA_NONE; 2002fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 201e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 202e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 203e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 204e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 205e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 206e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 207e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 208f7c9564aSKees Cook timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0); 209e48354ceSNicholas Bellinger 210e48354ceSNicholas Bellinger return cmd; 211e48354ceSNicholas Bellinger } 212cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 213e48354ceSNicholas Bellinger 214e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 215e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 216e48354ceSNicholas Bellinger u32 seq_send_order) 217e48354ceSNicholas Bellinger { 218e48354ceSNicholas Bellinger u32 i; 219e48354ceSNicholas Bellinger 220e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 221e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 222e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 223e48354ceSNicholas Bellinger 224e48354ceSNicholas Bellinger return NULL; 225e48354ceSNicholas Bellinger } 226e48354ceSNicholas Bellinger 227e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 228e48354ceSNicholas Bellinger { 229e48354ceSNicholas Bellinger u32 i; 230e48354ceSNicholas Bellinger 231e48354ceSNicholas Bellinger if (!cmd->seq_list) { 232e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 233e48354ceSNicholas Bellinger return NULL; 234e48354ceSNicholas Bellinger } 235e48354ceSNicholas Bellinger 236e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 237e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 238e48354ceSNicholas Bellinger continue; 239e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 240e48354ceSNicholas Bellinger cmd->seq_send_order++; 241e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 242e48354ceSNicholas Bellinger } 243e48354ceSNicholas Bellinger } 244e48354ceSNicholas Bellinger 245e48354ceSNicholas Bellinger return NULL; 246e48354ceSNicholas Bellinger } 247e48354ceSNicholas Bellinger 248e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 249e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 250e48354ceSNicholas Bellinger u32 r2t_sn) 251e48354ceSNicholas Bellinger { 252e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 253e48354ceSNicholas Bellinger 254e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 255e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 256e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 257e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 258e48354ceSNicholas Bellinger return r2t; 259e48354ceSNicholas Bellinger } 260e48354ceSNicholas Bellinger } 261e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 262e48354ceSNicholas Bellinger 263e48354ceSNicholas Bellinger return NULL; 264e48354ceSNicholas Bellinger } 265e48354ceSNicholas Bellinger 266e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 267e48354ceSNicholas Bellinger { 268109e2381SRoland Dreier u32 max_cmdsn; 269e48354ceSNicholas Bellinger int ret; 270e48354ceSNicholas Bellinger 271e48354ceSNicholas Bellinger /* 272e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 273e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 274e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 275e48354ceSNicholas Bellinger * CRC failures. 276e48354ceSNicholas Bellinger */ 277109e2381SRoland Dreier max_cmdsn = atomic_read(&sess->max_cmd_sn); 278109e2381SRoland Dreier if (iscsi_sna_gt(cmdsn, max_cmdsn)) { 279e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 280109e2381SRoland Dreier " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); 281ea7e32beSNicholas Bellinger ret = CMDSN_MAXCMDSN_OVERRUN; 282e48354ceSNicholas Bellinger 283e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 284e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 285e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 286e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 287e48354ceSNicholas Bellinger sess->exp_cmd_sn); 288e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 289e48354ceSNicholas Bellinger 290e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 291e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 292e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 293e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 294e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 295e48354ceSNicholas Bellinger 296e48354ceSNicholas Bellinger } else { 297e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 298e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 299e48354ceSNicholas Bellinger sess->exp_cmd_sn); 300e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 301e48354ceSNicholas Bellinger } 302e48354ceSNicholas Bellinger 303e48354ceSNicholas Bellinger return ret; 304e48354ceSNicholas Bellinger } 305e48354ceSNicholas Bellinger 306e48354ceSNicholas Bellinger /* 307e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 308e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 309e48354ceSNicholas Bellinger */ 310561bf158SNicholas Bellinger int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 311561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 312e48354ceSNicholas Bellinger { 313561bf158SNicholas Bellinger int ret, cmdsn_ret; 314561bf158SNicholas Bellinger bool reject = false; 315561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 316e48354ceSNicholas Bellinger 317e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 318e48354ceSNicholas Bellinger 31950e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 320e48354ceSNicholas Bellinger switch (cmdsn_ret) { 321e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 322e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 323e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 324e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 325561bf158SNicholas Bellinger else if (ret < 0) { 326561bf158SNicholas Bellinger reject = true; 327561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 328561bf158SNicholas Bellinger } 329e48354ceSNicholas Bellinger break; 330e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 33150e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 332561bf158SNicholas Bellinger if (ret < 0) { 333561bf158SNicholas Bellinger reject = true; 334561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 335561bf158SNicholas Bellinger break; 336561bf158SNicholas Bellinger } 337561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 338e48354ceSNicholas Bellinger break; 339e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 340ea7e32beSNicholas Bellinger case CMDSN_MAXCMDSN_OVERRUN: 341ea7e32beSNicholas Bellinger default: 342e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 343e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 344ea7e32beSNicholas Bellinger /* 345ea7e32beSNicholas Bellinger * Existing callers for iscsit_sequence_cmd() will silently 346ea7e32beSNicholas Bellinger * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 347ea7e32beSNicholas Bellinger * return for CMDSN_MAXCMDSN_OVERRUN as well.. 348ea7e32beSNicholas Bellinger */ 349ea7e32beSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 350e48354ceSNicholas Bellinger break; 351e48354ceSNicholas Bellinger } 352e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 353e48354ceSNicholas Bellinger 354561bf158SNicholas Bellinger if (reject) 355561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 356561bf158SNicholas Bellinger 357e48354ceSNicholas Bellinger return ret; 358e48354ceSNicholas Bellinger } 3593e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 360e48354ceSNicholas Bellinger 361e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 362e48354ceSNicholas Bellinger { 363e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 364e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 365e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 366e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 367e48354ceSNicholas Bellinger 368e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 369e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 370e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 371e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 372e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 373e48354ceSNicholas Bellinger return -1; 374e48354ceSNicholas Bellinger } 375e48354ceSNicholas Bellinger 376e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 377e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 378e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 379e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 380e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 381e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 382e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 383e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 384e48354ceSNicholas Bellinger return -1; 385e48354ceSNicholas Bellinger } 386e48354ceSNicholas Bellinger 387e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 388e48354ceSNicholas Bellinger return 0; 389e48354ceSNicholas Bellinger 390ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 391e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 392e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 393e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 394e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 395e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 396e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 397ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 398e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 399e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 400e48354ceSNicholas Bellinger return -1; 401e48354ceSNicholas Bellinger } 402e48354ceSNicholas Bellinger return 0; 403e48354ceSNicholas Bellinger } 404e48354ceSNicholas Bellinger 405e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 406e48354ceSNicholas Bellinger struct iscsi_conn *conn, 40766c7db68SChristoph Hellwig itt_t init_task_tag) 408e48354ceSNicholas Bellinger { 409e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 410e48354ceSNicholas Bellinger 411e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4122fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 413e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 414e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 415e48354ceSNicholas Bellinger return cmd; 416e48354ceSNicholas Bellinger } 417e48354ceSNicholas Bellinger } 418e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 419e48354ceSNicholas Bellinger 420e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 421e48354ceSNicholas Bellinger init_task_tag, conn->cid); 422e48354ceSNicholas Bellinger return NULL; 423e48354ceSNicholas Bellinger } 424e4f4e801SSagi Grimberg EXPORT_SYMBOL(iscsit_find_cmd_from_itt); 425e48354ceSNicholas Bellinger 426e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 427e48354ceSNicholas Bellinger struct iscsi_conn *conn, 42866c7db68SChristoph Hellwig itt_t init_task_tag, 429e48354ceSNicholas Bellinger u32 length) 430e48354ceSNicholas Bellinger { 431e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 432e48354ceSNicholas Bellinger 433e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4342fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 4353687db88SNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 4363687db88SNicholas Bellinger continue; 437e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 438e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 439e48354ceSNicholas Bellinger return cmd; 440e48354ceSNicholas Bellinger } 441e48354ceSNicholas Bellinger } 442e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 443e48354ceSNicholas Bellinger 444e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 445e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 446e48354ceSNicholas Bellinger if (length) 447e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 448e48354ceSNicholas Bellinger 449e48354ceSNicholas Bellinger return NULL; 450e48354ceSNicholas Bellinger } 4519a584bf9SVarun Prakash EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); 452e48354ceSNicholas Bellinger 453e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 454e48354ceSNicholas Bellinger struct iscsi_conn *conn, 455e48354ceSNicholas Bellinger u32 targ_xfer_tag) 456e48354ceSNicholas Bellinger { 457e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 458e48354ceSNicholas Bellinger 459e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4602fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 461e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 462e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 463e48354ceSNicholas Bellinger return cmd; 464e48354ceSNicholas Bellinger } 465e48354ceSNicholas Bellinger } 466e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 467e48354ceSNicholas Bellinger 468e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 469e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 470e48354ceSNicholas Bellinger return NULL; 471e48354ceSNicholas Bellinger } 472e48354ceSNicholas Bellinger 473e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 474e48354ceSNicholas Bellinger struct iscsi_session *sess, 475e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 476e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 47766c7db68SChristoph Hellwig itt_t init_task_tag) 478e48354ceSNicholas Bellinger { 479e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 480e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 481e48354ceSNicholas Bellinger /* 482e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 483e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 484e48354ceSNicholas Bellinger */ 485e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 486e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 487e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4882fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 489e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 490e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 491e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 492e48354ceSNicholas Bellinger 493e48354ceSNicholas Bellinger *cr_ptr = cr; 494e48354ceSNicholas Bellinger *cmd_ptr = cmd; 495e48354ceSNicholas Bellinger return -2; 496e48354ceSNicholas Bellinger } 497e48354ceSNicholas Bellinger } 498e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 499e48354ceSNicholas Bellinger } 500e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 501e48354ceSNicholas Bellinger /* 502e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 503e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 504e48354ceSNicholas Bellinger */ 505e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 506e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 507e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 5082fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 509e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 510e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 511e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 512e48354ceSNicholas Bellinger 513e48354ceSNicholas Bellinger *cr_ptr = cr; 514e48354ceSNicholas Bellinger *cmd_ptr = cmd; 515e48354ceSNicholas Bellinger return 0; 516e48354ceSNicholas Bellinger } 517e48354ceSNicholas Bellinger } 518e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 519e48354ceSNicholas Bellinger } 520e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 521e48354ceSNicholas Bellinger 522e48354ceSNicholas Bellinger return -1; 523e48354ceSNicholas Bellinger } 524e48354ceSNicholas Bellinger 525e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 526e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 527e48354ceSNicholas Bellinger struct iscsi_conn *conn, 528e48354ceSNicholas Bellinger u8 state) 529e48354ceSNicholas Bellinger { 530e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 531e48354ceSNicholas Bellinger 532e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 533e48354ceSNicholas Bellinger if (!qr) { 534e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 535e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 536e48354ceSNicholas Bellinger return; 537e48354ceSNicholas Bellinger } 538e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 539e48354ceSNicholas Bellinger qr->cmd = cmd; 540e48354ceSNicholas Bellinger qr->state = state; 541e48354ceSNicholas Bellinger 542e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 543e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 544e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 545e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 546e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 547e48354ceSNicholas Bellinger 548d5627acbSRoland Dreier wake_up(&conn->queues_wq); 549e48354ceSNicholas Bellinger } 550d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); 551e48354ceSNicholas Bellinger 552e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 553e48354ceSNicholas Bellinger { 554e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 555e48354ceSNicholas Bellinger 556e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 557e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 558e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 559e48354ceSNicholas Bellinger return NULL; 560e48354ceSNicholas Bellinger } 5611f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5621f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 563e48354ceSNicholas Bellinger 564e48354ceSNicholas Bellinger list_del(&qr->qr_list); 565e48354ceSNicholas Bellinger if (qr->cmd) 566e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 567e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 568e48354ceSNicholas Bellinger 569e48354ceSNicholas Bellinger return qr; 570e48354ceSNicholas Bellinger } 571e48354ceSNicholas Bellinger 572e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 573e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 574e48354ceSNicholas Bellinger struct iscsi_conn *conn) 575e48354ceSNicholas Bellinger { 576e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 577e48354ceSNicholas Bellinger 578e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 579e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 580e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 581e48354ceSNicholas Bellinger return; 582e48354ceSNicholas Bellinger } 583e48354ceSNicholas Bellinger 584e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 585e48354ceSNicholas Bellinger if (qr->cmd != cmd) 586e48354ceSNicholas Bellinger continue; 587e48354ceSNicholas Bellinger 588e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 589e48354ceSNicholas Bellinger list_del(&qr->qr_list); 590e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 591e48354ceSNicholas Bellinger } 592e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 593e48354ceSNicholas Bellinger 594e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 595e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 596e48354ceSNicholas Bellinger cmd->init_task_tag, 597e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 598e48354ceSNicholas Bellinger } 599e48354ceSNicholas Bellinger } 600e48354ceSNicholas Bellinger 601a4467018SNicholas Bellinger int iscsit_add_cmd_to_response_queue( 602e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 603e48354ceSNicholas Bellinger struct iscsi_conn *conn, 604e48354ceSNicholas Bellinger u8 state) 605e48354ceSNicholas Bellinger { 606e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 607e48354ceSNicholas Bellinger 608e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 609e48354ceSNicholas Bellinger if (!qr) { 610e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 611e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 612a4467018SNicholas Bellinger return -ENOMEM; 613e48354ceSNicholas Bellinger } 614e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 615e48354ceSNicholas Bellinger qr->cmd = cmd; 616e48354ceSNicholas Bellinger qr->state = state; 617e48354ceSNicholas Bellinger 618e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 619e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 620e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 621e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 622e48354ceSNicholas Bellinger 623d5627acbSRoland Dreier wake_up(&conn->queues_wq); 624a4467018SNicholas Bellinger return 0; 625e48354ceSNicholas Bellinger } 626e48354ceSNicholas Bellinger 627e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 628e48354ceSNicholas Bellinger { 629e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 630e48354ceSNicholas Bellinger 631e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 632e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 633e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 634e48354ceSNicholas Bellinger return NULL; 635e48354ceSNicholas Bellinger } 636e48354ceSNicholas Bellinger 6371f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6381f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 639e48354ceSNicholas Bellinger 640e48354ceSNicholas Bellinger list_del(&qr->qr_list); 641e48354ceSNicholas Bellinger if (qr->cmd) 642e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 643e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 644e48354ceSNicholas Bellinger 645e48354ceSNicholas Bellinger return qr; 646e48354ceSNicholas Bellinger } 647e48354ceSNicholas Bellinger 648e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 649e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 650e48354ceSNicholas Bellinger struct iscsi_conn *conn) 651e48354ceSNicholas Bellinger { 652e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 653e48354ceSNicholas Bellinger 654e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 655e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 656e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 657e48354ceSNicholas Bellinger return; 658e48354ceSNicholas Bellinger } 659e48354ceSNicholas Bellinger 660e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 661e48354ceSNicholas Bellinger qr_list) { 662e48354ceSNicholas Bellinger if (qr->cmd != cmd) 663e48354ceSNicholas Bellinger continue; 664e48354ceSNicholas Bellinger 665e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 666e48354ceSNicholas Bellinger list_del(&qr->qr_list); 667e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 668e48354ceSNicholas Bellinger } 669e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 670e48354ceSNicholas Bellinger 671e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 672e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 673e48354ceSNicholas Bellinger cmd->init_task_tag, 674e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 675e48354ceSNicholas Bellinger } 676e48354ceSNicholas Bellinger } 677e48354ceSNicholas Bellinger 678d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 679d5627acbSRoland Dreier { 680d5627acbSRoland Dreier bool empty; 681d5627acbSRoland Dreier 682d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 683d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 684d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 685d5627acbSRoland Dreier 686d5627acbSRoland Dreier if (!empty) 687d5627acbSRoland Dreier return empty; 688d5627acbSRoland Dreier 689d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 690d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 691d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 692d5627acbSRoland Dreier 693d5627acbSRoland Dreier return empty; 694d5627acbSRoland Dreier } 695d5627acbSRoland Dreier 696e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 697e48354ceSNicholas Bellinger { 698e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 699e48354ceSNicholas Bellinger 700e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 701e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 702e48354ceSNicholas Bellinger list_del(&qr->qr_list); 703e48354ceSNicholas Bellinger if (qr->cmd) 704e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 705e48354ceSNicholas Bellinger 706e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 707e48354ceSNicholas Bellinger } 708e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 709e48354ceSNicholas Bellinger 710e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 711e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 712e48354ceSNicholas Bellinger qr_list) { 713e48354ceSNicholas Bellinger list_del(&qr->qr_list); 714e48354ceSNicholas Bellinger if (qr->cmd) 715e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 716e48354ceSNicholas Bellinger 717e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 718e48354ceSNicholas Bellinger } 719e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 720e48354ceSNicholas Bellinger } 721e48354ceSNicholas Bellinger 722e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 723e48354ceSNicholas Bellinger { 724988e3a85SNicholas Bellinger struct iscsi_session *sess; 725988e3a85SNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 726988e3a85SNicholas Bellinger 7276eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 7286eaf69e4SBart Van Assche 729988e3a85SNicholas Bellinger if (cmd->conn) 730988e3a85SNicholas Bellinger sess = cmd->conn->sess; 731988e3a85SNicholas Bellinger else 732988e3a85SNicholas Bellinger sess = cmd->sess; 733988e3a85SNicholas Bellinger 734988e3a85SNicholas Bellinger BUG_ON(!sess || !sess->se_sess); 735988e3a85SNicholas Bellinger 736e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 737e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 738e48354ceSNicholas Bellinger kfree(cmd->seq_list); 739e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 7400ca650c1SBart Van Assche kfree(cmd->overflow_buf); 741e48354ceSNicholas Bellinger kfree(cmd->iov_data); 7429864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 743e48354ceSNicholas Bellinger 74483c2b54bSMatthew Wilcox target_free_tag(sess->se_sess, se_cmd); 745e48354ceSNicholas Bellinger } 746d703ce2fSNicholas Bellinger EXPORT_SYMBOL(iscsit_release_cmd); 747e48354ceSNicholas Bellinger 7484412a671SBart Van Assche void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool check_queues) 749d270190aSNicholas Bellinger { 750aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 751aafc9d15SNicholas Bellinger 7526eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 7536eaf69e4SBart Van Assche 754aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 755aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 756aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 757aafc9d15SNicholas Bellinger } 758aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 759aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 760aafc9d15SNicholas Bellinger 761aafc9d15SNicholas Bellinger if (conn && check_queues) { 762aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 763aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 764aafc9d15SNicholas Bellinger } 7657ec811a8SVarun Prakash 7661e65cc16SBart Van Assche if (conn && conn->conn_transport->iscsit_unmap_cmd) 7671e65cc16SBart Van Assche conn->conn_transport->iscsit_unmap_cmd(conn, cmd); 768aafc9d15SNicholas Bellinger } 769aafc9d15SNicholas Bellinger 770aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 771aafc9d15SNicholas Bellinger { 772d1c26857SBart Van Assche struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL; 773aafc9d15SNicholas Bellinger int rc; 7744412a671SBart Van Assche 775b0055acaSBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 776b0055acaSBart Van Assche 7774412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 778d1c26857SBart Van Assche if (se_cmd) { 779efb2ea77SNicholas Bellinger rc = transport_generic_free_cmd(se_cmd, shutdown); 780c8a75afbSBart Van Assche if (!rc && shutdown && se_cmd->se_sess) { 781c8a75afbSBart Van Assche __iscsit_free_cmd(cmd, shutdown); 782afc16604SBart Van Assche target_put_sess_cmd(se_cmd); 783c8a75afbSBart Van Assche } 784d1c26857SBart Van Assche } else { 785d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 786d270190aSNicholas Bellinger } 787d270190aSNicholas Bellinger } 788d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_free_cmd); 789d270190aSNicholas Bellinger 790e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 791e48354ceSNicholas Bellinger { 792e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 793e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 794e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 795e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 796e48354ceSNicholas Bellinger if (in_interrupt()) 797e48354ceSNicholas Bellinger return 2; 798e48354ceSNicholas Bellinger 799e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 800e48354ceSNicholas Bellinger return 1; 801e48354ceSNicholas Bellinger } 802e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 803e48354ceSNicholas Bellinger 804e48354ceSNicholas Bellinger return 0; 805e48354ceSNicholas Bellinger } 806e48354ceSNicholas Bellinger 807e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 808e48354ceSNicholas Bellinger { 809e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 810e48354ceSNicholas Bellinger sess->session_usage_count--; 811e48354ceSNicholas Bellinger 812e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 813e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 814e48354ceSNicholas Bellinger 815e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 816e48354ceSNicholas Bellinger } 817e48354ceSNicholas Bellinger 818e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 819e48354ceSNicholas Bellinger { 820e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 821e48354ceSNicholas Bellinger sess->session_usage_count++; 822e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 823e48354ceSNicholas Bellinger } 824e48354ceSNicholas Bellinger 825e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 826e48354ceSNicholas Bellinger { 827e48354ceSNicholas Bellinger struct iscsi_conn *conn; 828e48354ceSNicholas Bellinger 829e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 830e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 831e48354ceSNicholas Bellinger if ((conn->cid == cid) && 832e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 833e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 834e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 835e48354ceSNicholas Bellinger return conn; 836e48354ceSNicholas Bellinger } 837e48354ceSNicholas Bellinger } 838e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 839e48354ceSNicholas Bellinger 840e48354ceSNicholas Bellinger return NULL; 841e48354ceSNicholas Bellinger } 842e48354ceSNicholas Bellinger 843e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 844e48354ceSNicholas Bellinger { 845e48354ceSNicholas Bellinger struct iscsi_conn *conn; 846e48354ceSNicholas Bellinger 847e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 848e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 849e48354ceSNicholas Bellinger if (conn->cid == cid) { 850e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 851e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 852e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 853e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 854e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 855e48354ceSNicholas Bellinger return conn; 856e48354ceSNicholas Bellinger } 857e48354ceSNicholas Bellinger } 858e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 859e48354ceSNicholas Bellinger 860e48354ceSNicholas Bellinger return NULL; 861e48354ceSNicholas Bellinger } 862e48354ceSNicholas Bellinger 863e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 864e48354ceSNicholas Bellinger { 865e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 866e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 867e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 868e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 869e48354ceSNicholas Bellinger 870e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 871e48354ceSNicholas Bellinger return; 872e48354ceSNicholas Bellinger } 873e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 874e48354ceSNicholas Bellinger } 875e48354ceSNicholas Bellinger 876e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 877e48354ceSNicholas Bellinger { 878e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 879e48354ceSNicholas Bellinger conn->conn_usage_count--; 880e48354ceSNicholas Bellinger 881e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 882e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 883e48354ceSNicholas Bellinger 884e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 885e48354ceSNicholas Bellinger } 886e48354ceSNicholas Bellinger 887e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 888e48354ceSNicholas Bellinger { 889e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 890e48354ceSNicholas Bellinger conn->conn_usage_count++; 891e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 892e48354ceSNicholas Bellinger } 893e48354ceSNicholas Bellinger 894e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 895e48354ceSNicholas Bellinger { 896e48354ceSNicholas Bellinger u8 state; 897e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 898e48354ceSNicholas Bellinger 899676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 900e48354ceSNicholas Bellinger if (!cmd) 901e48354ceSNicholas Bellinger return -1; 902e48354ceSNicholas Bellinger 903e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 904e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 905e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 90666c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 907c1e34b64SSagi Grimberg cmd->targ_xfer_tag = (want_response) ? 908c1e34b64SSagi Grimberg session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 909e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 9102fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 911e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 912e48354ceSNicholas Bellinger 913e48354ceSNicholas Bellinger if (want_response) 914e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 915e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 916e48354ceSNicholas Bellinger 917e48354ceSNicholas Bellinger return 0; 918e48354ceSNicholas Bellinger } 919e48354ceSNicholas Bellinger 920f7c9564aSKees Cook void iscsit_handle_nopin_response_timeout(struct timer_list *t) 921e48354ceSNicholas Bellinger { 922f7c9564aSKees Cook struct iscsi_conn *conn = from_timer(conn, t, nopin_response_timer); 923c62ae300SDavid Disseldorp struct iscsi_session *sess = conn->sess; 924e48354ceSNicholas Bellinger 925e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 926e48354ceSNicholas Bellinger 927e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 928e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 929e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 930e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 931e48354ceSNicholas Bellinger return; 932e48354ceSNicholas Bellinger } 933e48354ceSNicholas Bellinger 934c62ae300SDavid Disseldorp pr_err("Did not receive response to NOPIN on CID: %hu, failing" 935c62ae300SDavid Disseldorp " connection for I_T Nexus %s,i,0x%6phN,%s,t,0x%02x\n", 936c62ae300SDavid Disseldorp conn->cid, sess->sess_ops->InitiatorName, sess->isid, 937c62ae300SDavid Disseldorp sess->tpg->tpg_tiqn->tiqn, (u32)sess->tpg->tpgt); 938e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 939e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 940e48354ceSNicholas Bellinger 941dce6190cSDavid Disseldorp iscsit_fill_cxn_timeout_err_stats(sess); 942e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 943e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 944e48354ceSNicholas Bellinger } 945e48354ceSNicholas Bellinger 946e48354ceSNicholas Bellinger void iscsit_mod_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 mod_timer(&conn->nopin_response_timer, 958e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 959e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 960e48354ceSNicholas Bellinger } 961e48354ceSNicholas Bellinger 962e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 963e48354ceSNicholas Bellinger { 964e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 965e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 966e48354ceSNicholas Bellinger 967e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 968e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 969e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 970e48354ceSNicholas Bellinger return; 971e48354ceSNicholas Bellinger } 972e48354ceSNicholas Bellinger 973e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 974e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 9758a47aa9dSBart Van Assche mod_timer(&conn->nopin_response_timer, 9768a47aa9dSBart Van Assche jiffies + na->nopin_response_timeout * HZ); 977e48354ceSNicholas Bellinger 978e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 979e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 980e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 981e48354ceSNicholas Bellinger } 982e48354ceSNicholas Bellinger 983e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 984e48354ceSNicholas Bellinger { 985e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 986e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 987e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 988e48354ceSNicholas Bellinger return; 989e48354ceSNicholas Bellinger } 990e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 991e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 992e48354ceSNicholas Bellinger 993e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 994e48354ceSNicholas Bellinger 995e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 996e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 997e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 998e48354ceSNicholas Bellinger } 999e48354ceSNicholas Bellinger 1000f7c9564aSKees Cook void iscsit_handle_nopin_timeout(struct timer_list *t) 1001e48354ceSNicholas Bellinger { 1002f7c9564aSKees Cook struct iscsi_conn *conn = from_timer(conn, t, nopin_timer); 1003e48354ceSNicholas Bellinger 1004e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1005e48354ceSNicholas Bellinger 1006e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1007e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1008e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1009e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1010e48354ceSNicholas Bellinger return; 1011e48354ceSNicholas Bellinger } 1012e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1013e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1014e48354ceSNicholas Bellinger 1015e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1016e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1017e48354ceSNicholas Bellinger } 1018e48354ceSNicholas Bellinger 1019e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1020e48354ceSNicholas Bellinger { 1021e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1022e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1023618baaf7SBart Van Assche 1024618baaf7SBart Van Assche lockdep_assert_held(&conn->nopin_timer_lock); 1025618baaf7SBart Van Assche 1026e48354ceSNicholas Bellinger /* 1027e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1028e48354ceSNicholas Bellinger */ 1029e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1030e48354ceSNicholas Bellinger return; 1031e48354ceSNicholas Bellinger 1032e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1033e48354ceSNicholas Bellinger return; 1034e48354ceSNicholas Bellinger 1035e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1036e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 10378a47aa9dSBart Van Assche mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 1038e48354ceSNicholas Bellinger 1039e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1040e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1041e48354ceSNicholas Bellinger } 1042e48354ceSNicholas Bellinger 1043e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1044e48354ceSNicholas Bellinger { 1045e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1046aeb50279SMike Christie __iscsit_start_nopin_timer(conn); 1047e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1048e48354ceSNicholas Bellinger } 1049e48354ceSNicholas Bellinger 1050e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1051e48354ceSNicholas Bellinger { 1052e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1053e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1054e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1055e48354ceSNicholas Bellinger return; 1056e48354ceSNicholas Bellinger } 1057e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1058e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1059e48354ceSNicholas Bellinger 1060e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1061e48354ceSNicholas Bellinger 1062e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1063e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1064e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1065e48354ceSNicholas Bellinger } 1066e48354ceSNicholas Bellinger 1067e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1068e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1069e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1070e48354ceSNicholas Bellinger int use_misc) 1071e48354ceSNicholas Bellinger { 1072e48354ceSNicholas Bellinger int tx_sent, tx_size; 1073e48354ceSNicholas Bellinger u32 iov_count; 1074e48354ceSNicholas Bellinger struct kvec *iov; 1075e48354ceSNicholas Bellinger 1076e48354ceSNicholas Bellinger send_data: 1077e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1078e48354ceSNicholas Bellinger 1079e48354ceSNicholas Bellinger if (!use_misc) { 1080e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1081e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1082e48354ceSNicholas Bellinger } else { 1083e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1084e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1085e48354ceSNicholas Bellinger } 1086e48354ceSNicholas Bellinger 1087e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1088e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1089e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1090e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1091e48354ceSNicholas Bellinger goto send_data; 1092e48354ceSNicholas Bellinger } else 1093e48354ceSNicholas Bellinger return -1; 1094e48354ceSNicholas Bellinger } 1095e48354ceSNicholas Bellinger cmd->tx_size = 0; 1096e48354ceSNicholas Bellinger 1097e48354ceSNicholas Bellinger return 0; 1098e48354ceSNicholas Bellinger } 1099e48354ceSNicholas Bellinger 1100e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1101e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1102e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1103e48354ceSNicholas Bellinger { 1104e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1105e48354ceSNicholas Bellinger struct kvec iov; 1106e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1107e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 110840b05497SNicholas Bellinger int tx_sent, iov_off; 1109e48354ceSNicholas Bellinger 1110e48354ceSNicholas Bellinger send_hdr: 1111e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1112e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1113e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1114e48354ceSNicholas Bellinger 1115e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1116e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1117e48354ceSNicholas Bellinger 1118e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1119e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1120e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1121e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1122e48354ceSNicholas Bellinger goto send_hdr; 1123e48354ceSNicholas Bellinger } 1124e48354ceSNicholas Bellinger return -1; 1125e48354ceSNicholas Bellinger } 1126e48354ceSNicholas Bellinger 1127e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 112840b05497SNicholas Bellinger /* 112940b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 113040b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 113140b05497SNicholas Bellinger */ 113240b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1133e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 113440b05497SNicholas Bellinger if (cmd->padding) 113540b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 113640b05497SNicholas Bellinger else 113740b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 113840b05497SNicholas Bellinger } else { 113940b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 114040b05497SNicholas Bellinger } 1141e48354ceSNicholas Bellinger /* 1142e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1143e48354ceSNicholas Bellinger */ 1144e48354ceSNicholas Bellinger while (data_len) { 1145e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1146e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1147e48354ceSNicholas Bellinger send_pg: 1148e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1149e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1150e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1151e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1152e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1153e48354ceSNicholas Bellinger " -EAGAIN\n"); 1154e48354ceSNicholas Bellinger goto send_pg; 1155e48354ceSNicholas Bellinger } 1156e48354ceSNicholas Bellinger 1157e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1158e48354ceSNicholas Bellinger tx_sent); 1159e48354ceSNicholas Bellinger return -1; 1160e48354ceSNicholas Bellinger } 1161e48354ceSNicholas Bellinger 1162e48354ceSNicholas Bellinger data_len -= sub_len; 1163e48354ceSNicholas Bellinger offset = 0; 1164e48354ceSNicholas Bellinger sg = sg_next(sg); 1165e48354ceSNicholas Bellinger } 1166e48354ceSNicholas Bellinger 1167e48354ceSNicholas Bellinger send_padding: 1168e48354ceSNicholas Bellinger if (cmd->padding) { 116940b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1170e48354ceSNicholas Bellinger 1171e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1172e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1173e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1174e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1175e48354ceSNicholas Bellinger goto send_padding; 1176e48354ceSNicholas Bellinger } 1177e48354ceSNicholas Bellinger return -1; 1178e48354ceSNicholas Bellinger } 1179e48354ceSNicholas Bellinger } 1180e48354ceSNicholas Bellinger 1181e48354ceSNicholas Bellinger send_datacrc: 1182e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 118340b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1184e48354ceSNicholas Bellinger 1185e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1186e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1187e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1188e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1189e48354ceSNicholas Bellinger goto send_datacrc; 1190e48354ceSNicholas Bellinger } 1191e48354ceSNicholas Bellinger return -1; 1192e48354ceSNicholas Bellinger } 1193e48354ceSNicholas Bellinger } 1194e48354ceSNicholas Bellinger 1195e48354ceSNicholas Bellinger return 0; 1196e48354ceSNicholas Bellinger } 1197e48354ceSNicholas Bellinger 1198e48354ceSNicholas Bellinger /* 1199e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1200e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1201e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1202e48354ceSNicholas Bellinger * 1203e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1204e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1205e48354ceSNicholas Bellinger */ 1206e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1207e48354ceSNicholas Bellinger { 1208e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1209baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1210e48354ceSNicholas Bellinger 1211baa4d64bSNicholas Bellinger login->login_failed = 1; 1212e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1213e48354ceSNicholas Bellinger 121468349756SNicholas Bellinger memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 121568349756SNicholas Bellinger 1216baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1217e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1218e48354ceSNicholas Bellinger hdr->status_class = status_class; 1219e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 122066c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1221e48354ceSNicholas Bellinger 1222baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1223e48354ceSNicholas Bellinger } 1224e48354ceSNicholas Bellinger 1225e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1226e48354ceSNicholas Bellinger { 1227e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1228e48354ceSNicholas Bellinger 1229e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1230e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1231e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1232e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1233e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1234e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1235e48354ceSNicholas Bellinger 1236e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1237e48354ceSNicholas Bellinger } 1238e48354ceSNicholas Bellinger 1239e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1240e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1241e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1242e48354ceSNicholas Bellinger { 1243e5a4b0bbSAl Viro int data = count->data_length, rx_loop = 0, total_rx = 0; 1244e48354ceSNicholas Bellinger struct msghdr msg; 1245e48354ceSNicholas Bellinger 1246e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1247e48354ceSNicholas Bellinger return -1; 1248e48354ceSNicholas Bellinger 1249e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1250aa563d7bSDavid Howells iov_iter_kvec(&msg.msg_iter, READ, count->iov, count->iov_count, data); 1251e48354ceSNicholas Bellinger 12522da62906SAl Viro while (msg_data_left(&msg)) { 12532da62906SAl Viro rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1254e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1255e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1256e48354ceSNicholas Bellinger rx_loop, total_rx); 1257e48354ceSNicholas Bellinger return rx_loop; 1258e48354ceSNicholas Bellinger } 1259e48354ceSNicholas Bellinger total_rx += rx_loop; 1260e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1261e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1262e48354ceSNicholas Bellinger } 1263e48354ceSNicholas Bellinger 1264e48354ceSNicholas Bellinger return total_rx; 1265e48354ceSNicholas Bellinger } 1266e48354ceSNicholas Bellinger 1267e48354ceSNicholas Bellinger int rx_data( 1268e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1269e48354ceSNicholas Bellinger struct kvec *iov, 1270e48354ceSNicholas Bellinger int iov_count, 1271e48354ceSNicholas Bellinger int data) 1272e48354ceSNicholas Bellinger { 1273e48354ceSNicholas Bellinger struct iscsi_data_count c; 1274e48354ceSNicholas Bellinger 1275e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1276e48354ceSNicholas Bellinger return -1; 1277e48354ceSNicholas Bellinger 1278e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1279e48354ceSNicholas Bellinger c.iov = iov; 1280e48354ceSNicholas Bellinger c.iov_count = iov_count; 1281e48354ceSNicholas Bellinger c.data_length = data; 1282e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1283e48354ceSNicholas Bellinger 1284e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1285e48354ceSNicholas Bellinger } 1286e48354ceSNicholas Bellinger 1287e48354ceSNicholas Bellinger int tx_data( 1288e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1289e48354ceSNicholas Bellinger struct kvec *iov, 1290e48354ceSNicholas Bellinger int iov_count, 1291e48354ceSNicholas Bellinger int data) 1292e48354ceSNicholas Bellinger { 12934113e47bSAl Viro struct msghdr msg; 12944113e47bSAl Viro int total_tx = 0; 1295e48354ceSNicholas Bellinger 1296e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1297e48354ceSNicholas Bellinger return -1; 1298e48354ceSNicholas Bellinger 12994113e47bSAl Viro if (data <= 0) { 13004113e47bSAl Viro pr_err("Data length is: %d\n", data); 13014113e47bSAl Viro return -1; 13024113e47bSAl Viro } 1303e48354ceSNicholas Bellinger 13044113e47bSAl Viro memset(&msg, 0, sizeof(struct msghdr)); 13054113e47bSAl Viro 1306aa563d7bSDavid Howells iov_iter_kvec(&msg.msg_iter, WRITE, iov, iov_count, data); 13074113e47bSAl Viro 13084113e47bSAl Viro while (msg_data_left(&msg)) { 13094113e47bSAl Viro int tx_loop = sock_sendmsg(conn->sock, &msg); 13104113e47bSAl Viro if (tx_loop <= 0) { 13114113e47bSAl Viro pr_debug("tx_loop: %d total_tx %d\n", 13124113e47bSAl Viro tx_loop, total_tx); 13134113e47bSAl Viro return tx_loop; 13144113e47bSAl Viro } 13154113e47bSAl Viro total_tx += tx_loop; 13164113e47bSAl Viro pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 13174113e47bSAl Viro tx_loop, total_tx, data); 13184113e47bSAl Viro } 13194113e47bSAl Viro 13204113e47bSAl Viro return total_tx; 1321e48354ceSNicholas Bellinger } 1322e48354ceSNicholas Bellinger 1323e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1324e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1325e48354ceSNicholas Bellinger u8 status_class, 1326e48354ceSNicholas Bellinger u8 status_detail) 1327e48354ceSNicholas Bellinger { 1328e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1329e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1330e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1331e48354ceSNicholas Bellinger 1332e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1333e48354ceSNicholas Bellinger if (!tiqn) 1334e48354ceSNicholas Bellinger return; 1335e48354ceSNicholas Bellinger 1336e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1337e48354ceSNicholas Bellinger 1338e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1339e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1340e48354ceSNicholas Bellinger ls->accepts++; 1341e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1342e48354ceSNicholas Bellinger ls->redirects++; 1343e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1344e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1345e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1346e48354ceSNicholas Bellinger ls->authenticate_fails++; 1347e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1348e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1349e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1350e48354ceSNicholas Bellinger ls->authorize_fails++; 1351e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1352e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1353e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1354e48354ceSNicholas Bellinger ls->negotiate_fails++; 1355e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1356e48354ceSNicholas Bellinger } else { 1357e48354ceSNicholas Bellinger ls->other_fails++; 1358e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1359e48354ceSNicholas Bellinger } 1360e48354ceSNicholas Bellinger 1361e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1362e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1363e48354ceSNicholas Bellinger if (conn->param_list) 1364e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1365e48354ceSNicholas Bellinger conn->param_list); 1366fdc84d11SJoern Engel strlcpy(ls->last_intr_fail_name, 1367fdc84d11SJoern Engel (intrname ? intrname->value : "Unknown"), 1368fdc84d11SJoern Engel sizeof(ls->last_intr_fail_name)); 1369e48354ceSNicholas Bellinger 1370baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1371baa4d64bSNicholas Bellinger 1372dc58f760SAndy Grover ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1373e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1374e48354ceSNicholas Bellinger } 1375e48354ceSNicholas Bellinger 1376e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1377e48354ceSNicholas Bellinger } 1378e48354ceSNicholas Bellinger 1379e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1380e48354ceSNicholas Bellinger { 1381e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1382e48354ceSNicholas Bellinger 138317c61ad6SNicholas Bellinger if (!conn) 1384e48354ceSNicholas Bellinger return NULL; 1385e48354ceSNicholas Bellinger 138617c61ad6SNicholas Bellinger tpg = conn->tpg; 1387e48354ceSNicholas Bellinger if (!tpg) 1388e48354ceSNicholas Bellinger return NULL; 1389e48354ceSNicholas Bellinger 1390e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1391e48354ceSNicholas Bellinger return NULL; 1392e48354ceSNicholas Bellinger 1393e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1394e48354ceSNicholas Bellinger } 1395dce6190cSDavid Disseldorp 1396dce6190cSDavid Disseldorp void iscsit_fill_cxn_timeout_err_stats(struct iscsi_session *sess) 1397dce6190cSDavid Disseldorp { 1398dce6190cSDavid Disseldorp struct iscsi_portal_group *tpg = sess->tpg; 1399dce6190cSDavid Disseldorp struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 1400dce6190cSDavid Disseldorp 1401dce6190cSDavid Disseldorp if (!tiqn) 1402dce6190cSDavid Disseldorp return; 1403dce6190cSDavid Disseldorp 1404dce6190cSDavid Disseldorp spin_lock_bh(&tiqn->sess_err_stats.lock); 1405dce6190cSDavid Disseldorp strlcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 1406dce6190cSDavid Disseldorp sess->sess_ops->InitiatorName, 1407dce6190cSDavid Disseldorp sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name)); 1408dce6190cSDavid Disseldorp tiqn->sess_err_stats.last_sess_failure_type = 1409dce6190cSDavid Disseldorp ISCSI_SESS_ERR_CXN_TIMEOUT; 1410dce6190cSDavid Disseldorp tiqn->sess_err_stats.cxn_timeout_errors++; 1411dce6190cSDavid Disseldorp atomic_long_inc(&sess->conn_timeout_errors); 1412dce6190cSDavid Disseldorp spin_unlock_bh(&tiqn->sess_err_stats.lock); 1413dce6190cSDavid Disseldorp } 1414