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 /* 60e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 61e48354ceSNicholas Bellinger */ 62e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 63e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 64e48354ceSNicholas Bellinger u32 offset, 65e48354ceSNicholas Bellinger u32 xfer_len, 66e48354ceSNicholas Bellinger int recovery, 67e48354ceSNicholas Bellinger u32 r2t_sn) 68e48354ceSNicholas Bellinger { 69e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 70e48354ceSNicholas Bellinger 71e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 72e48354ceSNicholas Bellinger if (!r2t) { 73e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 74e48354ceSNicholas Bellinger return -1; 75e48354ceSNicholas Bellinger } 76e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 77e48354ceSNicholas Bellinger 78e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 79e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 80e48354ceSNicholas Bellinger r2t->offset = offset; 81e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 82e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 83e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 84e48354ceSNicholas Bellinger 85e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 86e48354ceSNicholas Bellinger 87e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 88e48354ceSNicholas Bellinger return 0; 89e48354ceSNicholas Bellinger } 90e48354ceSNicholas Bellinger 91e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 92e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 93e48354ceSNicholas Bellinger u32 offset, 94e48354ceSNicholas Bellinger u32 length) 95e48354ceSNicholas Bellinger { 96e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 97e48354ceSNicholas Bellinger 98e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 99e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 100e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 101e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 102e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 103e48354ceSNicholas Bellinger return r2t; 104e48354ceSNicholas Bellinger } 105e48354ceSNicholas Bellinger } 106e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 107e48354ceSNicholas Bellinger 108e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 109e48354ceSNicholas Bellinger " %u\n", offset, length); 110e48354ceSNicholas Bellinger return NULL; 111e48354ceSNicholas Bellinger } 112e48354ceSNicholas Bellinger 113e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 114e48354ceSNicholas Bellinger { 115e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 116e48354ceSNicholas Bellinger 117e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 118e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 119e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 120e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 121e48354ceSNicholas Bellinger return r2t; 122e48354ceSNicholas Bellinger } 123e48354ceSNicholas Bellinger } 124e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 125e48354ceSNicholas Bellinger 126e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 127e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 128e48354ceSNicholas Bellinger return NULL; 129e48354ceSNicholas Bellinger } 130e48354ceSNicholas Bellinger 131e48354ceSNicholas Bellinger /* 132e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 133e48354ceSNicholas Bellinger */ 134e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 135e48354ceSNicholas Bellinger { 136e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 137e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 138e48354ceSNicholas Bellinger } 139e48354ceSNicholas Bellinger 140e48354ceSNicholas Bellinger void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 141e48354ceSNicholas Bellinger { 142e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 143e48354ceSNicholas Bellinger 144e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 145e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 146e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 147e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 148e48354ceSNicholas Bellinger } 149e48354ceSNicholas Bellinger 15010e9cbb6SMatthew Wilcox static int iscsit_wait_for_tag(struct se_session *se_sess, int state, int *cpup) 15110e9cbb6SMatthew Wilcox { 15210e9cbb6SMatthew Wilcox int tag = -1; 15310e9cbb6SMatthew Wilcox DEFINE_WAIT(wait); 15410e9cbb6SMatthew Wilcox struct sbq_wait_state *ws; 15510e9cbb6SMatthew Wilcox 15610e9cbb6SMatthew Wilcox if (state == TASK_RUNNING) 15710e9cbb6SMatthew Wilcox return tag; 15810e9cbb6SMatthew Wilcox 15910e9cbb6SMatthew Wilcox ws = &se_sess->sess_tag_pool.ws[0]; 16010e9cbb6SMatthew Wilcox for (;;) { 16110e9cbb6SMatthew Wilcox prepare_to_wait_exclusive(&ws->wait, &wait, state); 16210e9cbb6SMatthew Wilcox if (signal_pending_state(state, current)) 16310e9cbb6SMatthew Wilcox break; 16410e9cbb6SMatthew Wilcox tag = sbitmap_queue_get(&se_sess->sess_tag_pool, cpup); 16510e9cbb6SMatthew Wilcox if (tag >= 0) 16610e9cbb6SMatthew Wilcox break; 16710e9cbb6SMatthew Wilcox schedule(); 16810e9cbb6SMatthew Wilcox } 16910e9cbb6SMatthew Wilcox 17010e9cbb6SMatthew Wilcox finish_wait(&ws->wait, &wait); 17110e9cbb6SMatthew Wilcox return tag; 17210e9cbb6SMatthew Wilcox } 17310e9cbb6SMatthew Wilcox 174e48354ceSNicholas Bellinger /* 175e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 176e48354ceSNicholas Bellinger * iSCSI NopINs. 177e48354ceSNicholas Bellinger */ 178676687c6SNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) 179e48354ceSNicholas Bellinger { 180e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 181988e3a85SNicholas Bellinger struct se_session *se_sess = conn->sess->se_sess; 18210e9cbb6SMatthew Wilcox int size, tag, cpu; 183e48354ceSNicholas Bellinger 18410e9cbb6SMatthew Wilcox tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); 18510e9cbb6SMatthew Wilcox if (tag < 0) 18610e9cbb6SMatthew Wilcox tag = iscsit_wait_for_tag(se_sess, state, &cpu); 1876f6b5d1eSKent Overstreet if (tag < 0) 1886f6b5d1eSKent Overstreet return NULL; 1896f6b5d1eSKent Overstreet 190988e3a85SNicholas Bellinger size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; 191988e3a85SNicholas Bellinger cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); 192988e3a85SNicholas Bellinger memset(cmd, 0, size); 193988e3a85SNicholas Bellinger 194988e3a85SNicholas Bellinger cmd->se_cmd.map_tag = tag; 19510e9cbb6SMatthew Wilcox cmd->se_cmd.map_cpu = cpu; 196e48354ceSNicholas Bellinger cmd->conn = conn; 1974412a671SBart Van Assche cmd->data_direction = DMA_NONE; 1982fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 199e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 200e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 201e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 202e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 203e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 204e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 205e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 206f7c9564aSKees Cook timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0); 207e48354ceSNicholas Bellinger 208e48354ceSNicholas Bellinger return cmd; 209e48354ceSNicholas Bellinger } 210cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 211e48354ceSNicholas Bellinger 212e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 213e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 214e48354ceSNicholas Bellinger u32 seq_send_order) 215e48354ceSNicholas Bellinger { 216e48354ceSNicholas Bellinger u32 i; 217e48354ceSNicholas Bellinger 218e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 219e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 220e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 221e48354ceSNicholas Bellinger 222e48354ceSNicholas Bellinger return NULL; 223e48354ceSNicholas Bellinger } 224e48354ceSNicholas Bellinger 225e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 226e48354ceSNicholas Bellinger { 227e48354ceSNicholas Bellinger u32 i; 228e48354ceSNicholas Bellinger 229e48354ceSNicholas Bellinger if (!cmd->seq_list) { 230e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 231e48354ceSNicholas Bellinger return NULL; 232e48354ceSNicholas Bellinger } 233e48354ceSNicholas Bellinger 234e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 235e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 236e48354ceSNicholas Bellinger continue; 237e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 238e48354ceSNicholas Bellinger cmd->seq_send_order++; 239e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 240e48354ceSNicholas Bellinger } 241e48354ceSNicholas Bellinger } 242e48354ceSNicholas Bellinger 243e48354ceSNicholas Bellinger return NULL; 244e48354ceSNicholas Bellinger } 245e48354ceSNicholas Bellinger 246e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 247e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 248e48354ceSNicholas Bellinger u32 r2t_sn) 249e48354ceSNicholas Bellinger { 250e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 251e48354ceSNicholas Bellinger 252e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 253e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 254e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 255e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 256e48354ceSNicholas Bellinger return r2t; 257e48354ceSNicholas Bellinger } 258e48354ceSNicholas Bellinger } 259e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 260e48354ceSNicholas Bellinger 261e48354ceSNicholas Bellinger return NULL; 262e48354ceSNicholas Bellinger } 263e48354ceSNicholas Bellinger 264e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 265e48354ceSNicholas Bellinger { 266109e2381SRoland Dreier u32 max_cmdsn; 267e48354ceSNicholas Bellinger int ret; 268e48354ceSNicholas Bellinger 269e48354ceSNicholas Bellinger /* 270e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 271e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 272e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 273e48354ceSNicholas Bellinger * CRC failures. 274e48354ceSNicholas Bellinger */ 275109e2381SRoland Dreier max_cmdsn = atomic_read(&sess->max_cmd_sn); 276109e2381SRoland Dreier if (iscsi_sna_gt(cmdsn, max_cmdsn)) { 277e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 278109e2381SRoland Dreier " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); 279ea7e32beSNicholas Bellinger ret = CMDSN_MAXCMDSN_OVERRUN; 280e48354ceSNicholas Bellinger 281e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 282e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 283e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 284e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 285e48354ceSNicholas Bellinger sess->exp_cmd_sn); 286e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 287e48354ceSNicholas Bellinger 288e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 289e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 290e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 291e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 292e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 293e48354ceSNicholas Bellinger 294e48354ceSNicholas Bellinger } else { 295e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 296e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 297e48354ceSNicholas Bellinger sess->exp_cmd_sn); 298e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 299e48354ceSNicholas Bellinger } 300e48354ceSNicholas Bellinger 301e48354ceSNicholas Bellinger return ret; 302e48354ceSNicholas Bellinger } 303e48354ceSNicholas Bellinger 304e48354ceSNicholas Bellinger /* 305e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 306e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 307e48354ceSNicholas Bellinger */ 308561bf158SNicholas Bellinger int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 309561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 310e48354ceSNicholas Bellinger { 311561bf158SNicholas Bellinger int ret, cmdsn_ret; 312561bf158SNicholas Bellinger bool reject = false; 313561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 314e48354ceSNicholas Bellinger 315e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 316e48354ceSNicholas Bellinger 31750e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 318e48354ceSNicholas Bellinger switch (cmdsn_ret) { 319e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 320e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 321e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 322e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 323561bf158SNicholas Bellinger else if (ret < 0) { 324561bf158SNicholas Bellinger reject = true; 325561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 326561bf158SNicholas Bellinger } 327e48354ceSNicholas Bellinger break; 328e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 32950e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 330561bf158SNicholas Bellinger if (ret < 0) { 331561bf158SNicholas Bellinger reject = true; 332561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 333561bf158SNicholas Bellinger break; 334561bf158SNicholas Bellinger } 335561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 336e48354ceSNicholas Bellinger break; 337e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 338ea7e32beSNicholas Bellinger case CMDSN_MAXCMDSN_OVERRUN: 339ea7e32beSNicholas Bellinger default: 340e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 341e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 342ea7e32beSNicholas Bellinger /* 343ea7e32beSNicholas Bellinger * Existing callers for iscsit_sequence_cmd() will silently 344ea7e32beSNicholas Bellinger * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 345ea7e32beSNicholas Bellinger * return for CMDSN_MAXCMDSN_OVERRUN as well.. 346ea7e32beSNicholas Bellinger */ 347ea7e32beSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 348e48354ceSNicholas Bellinger break; 349e48354ceSNicholas Bellinger } 350e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 351e48354ceSNicholas Bellinger 352561bf158SNicholas Bellinger if (reject) 353561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 354561bf158SNicholas Bellinger 355e48354ceSNicholas Bellinger return ret; 356e48354ceSNicholas Bellinger } 3573e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 358e48354ceSNicholas Bellinger 359e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 360e48354ceSNicholas Bellinger { 361e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 362e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 363e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 364e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 365e48354ceSNicholas Bellinger 366e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 367e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 368e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 369e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 370e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 371e48354ceSNicholas Bellinger return -1; 372e48354ceSNicholas Bellinger } 373e48354ceSNicholas Bellinger 374e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 375e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 376e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 377e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 378e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 379e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 380e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 381e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 382e48354ceSNicholas Bellinger return -1; 383e48354ceSNicholas Bellinger } 384e48354ceSNicholas Bellinger 385e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 386e48354ceSNicholas Bellinger return 0; 387e48354ceSNicholas Bellinger 388ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 389e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 390e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 391e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 392e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 393e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 394e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 395ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 396e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 397e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 398e48354ceSNicholas Bellinger return -1; 399e48354ceSNicholas Bellinger } 400e48354ceSNicholas Bellinger return 0; 401e48354ceSNicholas Bellinger } 402e48354ceSNicholas Bellinger 403e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 404e48354ceSNicholas Bellinger struct iscsi_conn *conn, 40566c7db68SChristoph Hellwig itt_t init_task_tag) 406e48354ceSNicholas Bellinger { 407e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 408e48354ceSNicholas Bellinger 409e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4102fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 411e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 412e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 413e48354ceSNicholas Bellinger return cmd; 414e48354ceSNicholas Bellinger } 415e48354ceSNicholas Bellinger } 416e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 417e48354ceSNicholas Bellinger 418e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 419e48354ceSNicholas Bellinger init_task_tag, conn->cid); 420e48354ceSNicholas Bellinger return NULL; 421e48354ceSNicholas Bellinger } 422e4f4e801SSagi Grimberg EXPORT_SYMBOL(iscsit_find_cmd_from_itt); 423e48354ceSNicholas Bellinger 424e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 425e48354ceSNicholas Bellinger struct iscsi_conn *conn, 42666c7db68SChristoph Hellwig itt_t init_task_tag, 427e48354ceSNicholas Bellinger u32 length) 428e48354ceSNicholas Bellinger { 429e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 430e48354ceSNicholas Bellinger 431e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4322fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 4333687db88SNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 4343687db88SNicholas Bellinger continue; 435e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 436e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 437e48354ceSNicholas Bellinger return cmd; 438e48354ceSNicholas Bellinger } 439e48354ceSNicholas Bellinger } 440e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 441e48354ceSNicholas Bellinger 442e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 443e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 444e48354ceSNicholas Bellinger if (length) 445e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 446e48354ceSNicholas Bellinger 447e48354ceSNicholas Bellinger return NULL; 448e48354ceSNicholas Bellinger } 4499a584bf9SVarun Prakash EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); 450e48354ceSNicholas Bellinger 451e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 452e48354ceSNicholas Bellinger struct iscsi_conn *conn, 453e48354ceSNicholas Bellinger u32 targ_xfer_tag) 454e48354ceSNicholas Bellinger { 455e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 456e48354ceSNicholas Bellinger 457e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4582fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 459e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 460e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 461e48354ceSNicholas Bellinger return cmd; 462e48354ceSNicholas Bellinger } 463e48354ceSNicholas Bellinger } 464e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 465e48354ceSNicholas Bellinger 466e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 467e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 468e48354ceSNicholas Bellinger return NULL; 469e48354ceSNicholas Bellinger } 470e48354ceSNicholas Bellinger 471e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 472e48354ceSNicholas Bellinger struct iscsi_session *sess, 473e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 474e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 47566c7db68SChristoph Hellwig itt_t init_task_tag) 476e48354ceSNicholas Bellinger { 477e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 478e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 479e48354ceSNicholas Bellinger /* 480e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 481e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 482e48354ceSNicholas Bellinger */ 483e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 484e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 485e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4862fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 487e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 488e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 489e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 490e48354ceSNicholas Bellinger 491e48354ceSNicholas Bellinger *cr_ptr = cr; 492e48354ceSNicholas Bellinger *cmd_ptr = cmd; 493e48354ceSNicholas Bellinger return -2; 494e48354ceSNicholas Bellinger } 495e48354ceSNicholas Bellinger } 496e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 497e48354ceSNicholas Bellinger } 498e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 499e48354ceSNicholas Bellinger /* 500e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 501e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 502e48354ceSNicholas Bellinger */ 503e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 504e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 505e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 5062fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 507e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 508e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 509e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 510e48354ceSNicholas Bellinger 511e48354ceSNicholas Bellinger *cr_ptr = cr; 512e48354ceSNicholas Bellinger *cmd_ptr = cmd; 513e48354ceSNicholas Bellinger return 0; 514e48354ceSNicholas Bellinger } 515e48354ceSNicholas Bellinger } 516e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 517e48354ceSNicholas Bellinger } 518e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 519e48354ceSNicholas Bellinger 520e48354ceSNicholas Bellinger return -1; 521e48354ceSNicholas Bellinger } 522e48354ceSNicholas Bellinger 523e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 524e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 525e48354ceSNicholas Bellinger struct iscsi_conn *conn, 526e48354ceSNicholas Bellinger u8 state) 527e48354ceSNicholas Bellinger { 528e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 529e48354ceSNicholas Bellinger 530e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 531e48354ceSNicholas Bellinger if (!qr) { 532e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 533e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 534e48354ceSNicholas Bellinger return; 535e48354ceSNicholas Bellinger } 536e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 537e48354ceSNicholas Bellinger qr->cmd = cmd; 538e48354ceSNicholas Bellinger qr->state = state; 539e48354ceSNicholas Bellinger 540e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 541e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 542e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 543e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 544e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 545e48354ceSNicholas Bellinger 546d5627acbSRoland Dreier wake_up(&conn->queues_wq); 547e48354ceSNicholas Bellinger } 548d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); 549e48354ceSNicholas Bellinger 550e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 551e48354ceSNicholas Bellinger { 552e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 553e48354ceSNicholas Bellinger 554e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 555e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 556e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 557e48354ceSNicholas Bellinger return NULL; 558e48354ceSNicholas Bellinger } 5591f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5601f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 561e48354ceSNicholas Bellinger 562e48354ceSNicholas Bellinger list_del(&qr->qr_list); 563e48354ceSNicholas Bellinger if (qr->cmd) 564e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 565e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 566e48354ceSNicholas Bellinger 567e48354ceSNicholas Bellinger return qr; 568e48354ceSNicholas Bellinger } 569e48354ceSNicholas Bellinger 570e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 571e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 572e48354ceSNicholas Bellinger struct iscsi_conn *conn) 573e48354ceSNicholas Bellinger { 574e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 575e48354ceSNicholas Bellinger 576e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 577e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 578e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 579e48354ceSNicholas Bellinger return; 580e48354ceSNicholas Bellinger } 581e48354ceSNicholas Bellinger 582e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 583e48354ceSNicholas Bellinger if (qr->cmd != cmd) 584e48354ceSNicholas Bellinger continue; 585e48354ceSNicholas Bellinger 586e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 587e48354ceSNicholas Bellinger list_del(&qr->qr_list); 588e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 589e48354ceSNicholas Bellinger } 590e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 591e48354ceSNicholas Bellinger 592e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 593e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 594e48354ceSNicholas Bellinger cmd->init_task_tag, 595e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 596e48354ceSNicholas Bellinger } 597e48354ceSNicholas Bellinger } 598e48354ceSNicholas Bellinger 599a4467018SNicholas Bellinger int iscsit_add_cmd_to_response_queue( 600e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 601e48354ceSNicholas Bellinger struct iscsi_conn *conn, 602e48354ceSNicholas Bellinger u8 state) 603e48354ceSNicholas Bellinger { 604e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 605e48354ceSNicholas Bellinger 606e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 607e48354ceSNicholas Bellinger if (!qr) { 608e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 609e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 610a4467018SNicholas Bellinger return -ENOMEM; 611e48354ceSNicholas Bellinger } 612e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 613e48354ceSNicholas Bellinger qr->cmd = cmd; 614e48354ceSNicholas Bellinger qr->state = state; 615e48354ceSNicholas Bellinger 616e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 617e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 618e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 619e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 620e48354ceSNicholas Bellinger 621d5627acbSRoland Dreier wake_up(&conn->queues_wq); 622a4467018SNicholas Bellinger return 0; 623e48354ceSNicholas Bellinger } 624e48354ceSNicholas Bellinger 625e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 626e48354ceSNicholas Bellinger { 627e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 628e48354ceSNicholas Bellinger 629e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 630e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 631e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 632e48354ceSNicholas Bellinger return NULL; 633e48354ceSNicholas Bellinger } 634e48354ceSNicholas Bellinger 6351f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6361f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 637e48354ceSNicholas Bellinger 638e48354ceSNicholas Bellinger list_del(&qr->qr_list); 639e48354ceSNicholas Bellinger if (qr->cmd) 640e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 641e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 642e48354ceSNicholas Bellinger 643e48354ceSNicholas Bellinger return qr; 644e48354ceSNicholas Bellinger } 645e48354ceSNicholas Bellinger 646e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 647e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 648e48354ceSNicholas Bellinger struct iscsi_conn *conn) 649e48354ceSNicholas Bellinger { 650e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 651e48354ceSNicholas Bellinger 652e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 653e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 654e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 655e48354ceSNicholas Bellinger return; 656e48354ceSNicholas Bellinger } 657e48354ceSNicholas Bellinger 658e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 659e48354ceSNicholas Bellinger qr_list) { 660e48354ceSNicholas Bellinger if (qr->cmd != cmd) 661e48354ceSNicholas Bellinger continue; 662e48354ceSNicholas Bellinger 663e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 664e48354ceSNicholas Bellinger list_del(&qr->qr_list); 665e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 666e48354ceSNicholas Bellinger } 667e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 668e48354ceSNicholas Bellinger 669e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 670e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 671e48354ceSNicholas Bellinger cmd->init_task_tag, 672e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 673e48354ceSNicholas Bellinger } 674e48354ceSNicholas Bellinger } 675e48354ceSNicholas Bellinger 676d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 677d5627acbSRoland Dreier { 678d5627acbSRoland Dreier bool empty; 679d5627acbSRoland Dreier 680d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 681d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 682d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 683d5627acbSRoland Dreier 684d5627acbSRoland Dreier if (!empty) 685d5627acbSRoland Dreier return empty; 686d5627acbSRoland Dreier 687d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 688d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 689d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 690d5627acbSRoland Dreier 691d5627acbSRoland Dreier return empty; 692d5627acbSRoland Dreier } 693d5627acbSRoland Dreier 694e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 695e48354ceSNicholas Bellinger { 696e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 697e48354ceSNicholas Bellinger 698e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 699e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 700e48354ceSNicholas Bellinger list_del(&qr->qr_list); 701e48354ceSNicholas Bellinger if (qr->cmd) 702e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 703e48354ceSNicholas Bellinger 704e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 705e48354ceSNicholas Bellinger } 706e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 707e48354ceSNicholas Bellinger 708e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 709e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 710e48354ceSNicholas Bellinger qr_list) { 711e48354ceSNicholas Bellinger list_del(&qr->qr_list); 712e48354ceSNicholas Bellinger if (qr->cmd) 713e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 714e48354ceSNicholas Bellinger 715e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 716e48354ceSNicholas Bellinger } 717e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 718e48354ceSNicholas Bellinger } 719e48354ceSNicholas Bellinger 720e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 721e48354ceSNicholas Bellinger { 722988e3a85SNicholas Bellinger struct iscsi_session *sess; 723988e3a85SNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 724988e3a85SNicholas Bellinger 7256eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 7266eaf69e4SBart Van Assche 727988e3a85SNicholas Bellinger if (cmd->conn) 728988e3a85SNicholas Bellinger sess = cmd->conn->sess; 729988e3a85SNicholas Bellinger else 730988e3a85SNicholas Bellinger sess = cmd->sess; 731988e3a85SNicholas Bellinger 732988e3a85SNicholas Bellinger BUG_ON(!sess || !sess->se_sess); 733988e3a85SNicholas Bellinger 734e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 735e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 736e48354ceSNicholas Bellinger kfree(cmd->seq_list); 737e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 738e48354ceSNicholas Bellinger kfree(cmd->iov_data); 7399864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 740e48354ceSNicholas Bellinger 74183c2b54bSMatthew Wilcox target_free_tag(sess->se_sess, se_cmd); 742e48354ceSNicholas Bellinger } 743d703ce2fSNicholas Bellinger EXPORT_SYMBOL(iscsit_release_cmd); 744e48354ceSNicholas Bellinger 7454412a671SBart Van Assche void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool check_queues) 746d270190aSNicholas Bellinger { 747aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 748aafc9d15SNicholas Bellinger 7496eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 7506eaf69e4SBart Van Assche 751aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 752aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 753aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 754aafc9d15SNicholas Bellinger } 755aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 756aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 757aafc9d15SNicholas Bellinger 758aafc9d15SNicholas Bellinger if (conn && check_queues) { 759aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 760aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 761aafc9d15SNicholas Bellinger } 7627ec811a8SVarun Prakash 7637ec811a8SVarun Prakash if (conn && conn->conn_transport->iscsit_release_cmd) 7647ec811a8SVarun Prakash conn->conn_transport->iscsit_release_cmd(conn, cmd); 765aafc9d15SNicholas Bellinger } 766aafc9d15SNicholas Bellinger 767aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 768aafc9d15SNicholas Bellinger { 769d1c26857SBart Van Assche struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL; 770aafc9d15SNicholas Bellinger int rc; 7714412a671SBart Van Assche 7724412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 773d1c26857SBart Van Assche if (se_cmd) { 774efb2ea77SNicholas Bellinger rc = transport_generic_free_cmd(se_cmd, shutdown); 775efb2ea77SNicholas Bellinger if (!rc && shutdown && se_cmd->se_sess) { 7764412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 777afc16604SBart Van Assche target_put_sess_cmd(se_cmd); 778aafc9d15SNicholas Bellinger } 779d1c26857SBart Van Assche } else { 780d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 781d270190aSNicholas Bellinger } 782d270190aSNicholas Bellinger } 783d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_free_cmd); 784d270190aSNicholas Bellinger 785e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 786e48354ceSNicholas Bellinger { 787e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 788e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 789e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 790e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 791e48354ceSNicholas Bellinger if (in_interrupt()) 792e48354ceSNicholas Bellinger return 2; 793e48354ceSNicholas Bellinger 794e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 795e48354ceSNicholas Bellinger return 1; 796e48354ceSNicholas Bellinger } 797e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 798e48354ceSNicholas Bellinger 799e48354ceSNicholas Bellinger return 0; 800e48354ceSNicholas Bellinger } 801e48354ceSNicholas Bellinger 802e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 803e48354ceSNicholas Bellinger { 804e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 805e48354ceSNicholas Bellinger sess->session_usage_count--; 806e48354ceSNicholas Bellinger 807e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 808e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 809e48354ceSNicholas Bellinger 810e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 811e48354ceSNicholas Bellinger } 812e48354ceSNicholas Bellinger 813e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 814e48354ceSNicholas Bellinger { 815e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 816e48354ceSNicholas Bellinger sess->session_usage_count++; 817e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 818e48354ceSNicholas Bellinger } 819e48354ceSNicholas Bellinger 820e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 821e48354ceSNicholas Bellinger { 822e48354ceSNicholas Bellinger struct iscsi_conn *conn; 823e48354ceSNicholas Bellinger 824e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 825e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 826e48354ceSNicholas Bellinger if ((conn->cid == cid) && 827e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 828e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 829e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 830e48354ceSNicholas Bellinger return conn; 831e48354ceSNicholas Bellinger } 832e48354ceSNicholas Bellinger } 833e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 834e48354ceSNicholas Bellinger 835e48354ceSNicholas Bellinger return NULL; 836e48354ceSNicholas Bellinger } 837e48354ceSNicholas Bellinger 838e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 839e48354ceSNicholas Bellinger { 840e48354ceSNicholas Bellinger struct iscsi_conn *conn; 841e48354ceSNicholas Bellinger 842e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 843e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 844e48354ceSNicholas Bellinger if (conn->cid == cid) { 845e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 846e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 847e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 848e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 849e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 850e48354ceSNicholas Bellinger return conn; 851e48354ceSNicholas Bellinger } 852e48354ceSNicholas Bellinger } 853e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 854e48354ceSNicholas Bellinger 855e48354ceSNicholas Bellinger return NULL; 856e48354ceSNicholas Bellinger } 857e48354ceSNicholas Bellinger 858e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 859e48354ceSNicholas Bellinger { 860e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 861e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 862e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 863e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 864e48354ceSNicholas Bellinger 865e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 866e48354ceSNicholas Bellinger return; 867e48354ceSNicholas Bellinger } 868e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 869e48354ceSNicholas Bellinger } 870e48354ceSNicholas Bellinger 871e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 872e48354ceSNicholas Bellinger { 873e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 874e48354ceSNicholas Bellinger conn->conn_usage_count--; 875e48354ceSNicholas Bellinger 876e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 877e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 878e48354ceSNicholas Bellinger 879e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 880e48354ceSNicholas Bellinger } 881e48354ceSNicholas Bellinger 882e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 883e48354ceSNicholas Bellinger { 884e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 885e48354ceSNicholas Bellinger conn->conn_usage_count++; 886e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 887e48354ceSNicholas Bellinger } 888e48354ceSNicholas Bellinger 889e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 890e48354ceSNicholas Bellinger { 891e48354ceSNicholas Bellinger u8 state; 892e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 893e48354ceSNicholas Bellinger 894676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 895e48354ceSNicholas Bellinger if (!cmd) 896e48354ceSNicholas Bellinger return -1; 897e48354ceSNicholas Bellinger 898e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 899e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 900e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 90166c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 902c1e34b64SSagi Grimberg cmd->targ_xfer_tag = (want_response) ? 903c1e34b64SSagi Grimberg session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 904e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 9052fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 906e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 907e48354ceSNicholas Bellinger 908e48354ceSNicholas Bellinger if (want_response) 909e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 910e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 911e48354ceSNicholas Bellinger 912e48354ceSNicholas Bellinger return 0; 913e48354ceSNicholas Bellinger } 914e48354ceSNicholas Bellinger 915f7c9564aSKees Cook void iscsit_handle_nopin_response_timeout(struct timer_list *t) 916e48354ceSNicholas Bellinger { 917f7c9564aSKees Cook struct iscsi_conn *conn = from_timer(conn, t, nopin_response_timer); 918e48354ceSNicholas Bellinger 919e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 920e48354ceSNicholas Bellinger 921e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 922e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 923e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 924e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 925e48354ceSNicholas Bellinger return; 926e48354ceSNicholas Bellinger } 927e48354ceSNicholas Bellinger 928e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 929e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 930e48354ceSNicholas Bellinger conn->sess->sid); 931e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 932e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 933e48354ceSNicholas Bellinger 934e48354ceSNicholas Bellinger { 935e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 936e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 937e48354ceSNicholas Bellinger 938e48354ceSNicholas Bellinger if (tiqn) { 939e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 940e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9418359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 942e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 943e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 944e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 94504f3b31bSNicholas Bellinger atomic_long_inc(&conn->sess->conn_timeout_errors); 946e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 947e48354ceSNicholas Bellinger } 948e48354ceSNicholas Bellinger } 949e48354ceSNicholas Bellinger 950e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 951e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 952e48354ceSNicholas Bellinger } 953e48354ceSNicholas Bellinger 954e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 955e48354ceSNicholas Bellinger { 956e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 957e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 958e48354ceSNicholas Bellinger 959e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 960e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 961e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 962e48354ceSNicholas Bellinger return; 963e48354ceSNicholas Bellinger } 964e48354ceSNicholas Bellinger 965e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 966e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 967e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 968e48354ceSNicholas Bellinger } 969e48354ceSNicholas Bellinger 970e48354ceSNicholas Bellinger /* 971e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 972e48354ceSNicholas Bellinger */ 973e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 974e48354ceSNicholas Bellinger { 975e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 976e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 977e48354ceSNicholas Bellinger 978e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 979e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 980e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 981e48354ceSNicholas Bellinger return; 982e48354ceSNicholas Bellinger } 983e48354ceSNicholas Bellinger 984e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 985e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 9868a47aa9dSBart Van Assche mod_timer(&conn->nopin_response_timer, 9878a47aa9dSBart Van Assche jiffies + na->nopin_response_timeout * HZ); 988e48354ceSNicholas Bellinger 989e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 990e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 991e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 992e48354ceSNicholas Bellinger } 993e48354ceSNicholas Bellinger 994e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 995e48354ceSNicholas Bellinger { 996e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 997e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 998e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 999e48354ceSNicholas Bellinger return; 1000e48354ceSNicholas Bellinger } 1001e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1002e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1003e48354ceSNicholas Bellinger 1004e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 1005e48354ceSNicholas Bellinger 1006e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1007e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1008e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1009e48354ceSNicholas Bellinger } 1010e48354ceSNicholas Bellinger 1011f7c9564aSKees Cook void iscsit_handle_nopin_timeout(struct timer_list *t) 1012e48354ceSNicholas Bellinger { 1013f7c9564aSKees Cook struct iscsi_conn *conn = from_timer(conn, t, nopin_timer); 1014e48354ceSNicholas Bellinger 1015e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1016e48354ceSNicholas Bellinger 1017e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1018e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1019e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1020e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1021e48354ceSNicholas Bellinger return; 1022e48354ceSNicholas Bellinger } 1023e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1024e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1025e48354ceSNicholas Bellinger 1026e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1027e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1028e48354ceSNicholas Bellinger } 1029e48354ceSNicholas Bellinger 1030e48354ceSNicholas Bellinger /* 1031e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1032e48354ceSNicholas Bellinger */ 1033e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1034e48354ceSNicholas Bellinger { 1035e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1036e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1037e48354ceSNicholas Bellinger /* 1038e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1039e48354ceSNicholas Bellinger */ 1040e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1041e48354ceSNicholas Bellinger return; 1042e48354ceSNicholas Bellinger 1043e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1044e48354ceSNicholas Bellinger return; 1045e48354ceSNicholas Bellinger 1046e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1047e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 10488a47aa9dSBart Van Assche mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 1049e48354ceSNicholas Bellinger 1050e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1051e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1052e48354ceSNicholas Bellinger } 1053e48354ceSNicholas Bellinger 1054e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1055e48354ceSNicholas Bellinger { 1056e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1057e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1058e48354ceSNicholas Bellinger /* 1059e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1060e48354ceSNicholas Bellinger */ 1061e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1062e48354ceSNicholas Bellinger return; 1063e48354ceSNicholas Bellinger 1064e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1065e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1066e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1067e48354ceSNicholas Bellinger return; 1068e48354ceSNicholas Bellinger } 1069e48354ceSNicholas Bellinger 1070e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1071e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 10728a47aa9dSBart Van Assche mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 1073e48354ceSNicholas Bellinger 1074e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1075e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1076e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1077e48354ceSNicholas Bellinger } 1078e48354ceSNicholas Bellinger 1079e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1080e48354ceSNicholas Bellinger { 1081e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1082e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1083e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1084e48354ceSNicholas Bellinger return; 1085e48354ceSNicholas Bellinger } 1086e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1087e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1088e48354ceSNicholas Bellinger 1089e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1090e48354ceSNicholas Bellinger 1091e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1092e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1093e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1094e48354ceSNicholas Bellinger } 1095e48354ceSNicholas Bellinger 1096e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1097e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1098e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1099e48354ceSNicholas Bellinger int use_misc) 1100e48354ceSNicholas Bellinger { 1101e48354ceSNicholas Bellinger int tx_sent, tx_size; 1102e48354ceSNicholas Bellinger u32 iov_count; 1103e48354ceSNicholas Bellinger struct kvec *iov; 1104e48354ceSNicholas Bellinger 1105e48354ceSNicholas Bellinger send_data: 1106e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1107e48354ceSNicholas Bellinger 1108e48354ceSNicholas Bellinger if (!use_misc) { 1109e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1110e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1111e48354ceSNicholas Bellinger } else { 1112e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1113e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1114e48354ceSNicholas Bellinger } 1115e48354ceSNicholas Bellinger 1116e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1117e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1118e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1119e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1120e48354ceSNicholas Bellinger goto send_data; 1121e48354ceSNicholas Bellinger } else 1122e48354ceSNicholas Bellinger return -1; 1123e48354ceSNicholas Bellinger } 1124e48354ceSNicholas Bellinger cmd->tx_size = 0; 1125e48354ceSNicholas Bellinger 1126e48354ceSNicholas Bellinger return 0; 1127e48354ceSNicholas Bellinger } 1128e48354ceSNicholas Bellinger 1129e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1130e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1131e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1132e48354ceSNicholas Bellinger { 1133e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1134e48354ceSNicholas Bellinger struct kvec iov; 1135e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1136e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 113740b05497SNicholas Bellinger int tx_sent, iov_off; 1138e48354ceSNicholas Bellinger 1139e48354ceSNicholas Bellinger send_hdr: 1140e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1141e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1142e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1143e48354ceSNicholas Bellinger 1144e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1145e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1146e48354ceSNicholas Bellinger 1147e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1148e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1149e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1150e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1151e48354ceSNicholas Bellinger goto send_hdr; 1152e48354ceSNicholas Bellinger } 1153e48354ceSNicholas Bellinger return -1; 1154e48354ceSNicholas Bellinger } 1155e48354ceSNicholas Bellinger 1156e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 115740b05497SNicholas Bellinger /* 115840b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 115940b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 116040b05497SNicholas Bellinger */ 116140b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1162e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 116340b05497SNicholas Bellinger if (cmd->padding) 116440b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 116540b05497SNicholas Bellinger else 116640b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 116740b05497SNicholas Bellinger } else { 116840b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 116940b05497SNicholas Bellinger } 1170e48354ceSNicholas Bellinger /* 1171e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1172e48354ceSNicholas Bellinger */ 1173e48354ceSNicholas Bellinger while (data_len) { 1174e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1175e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1176e48354ceSNicholas Bellinger send_pg: 1177e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1178e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1179e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1180e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1181e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1182e48354ceSNicholas Bellinger " -EAGAIN\n"); 1183e48354ceSNicholas Bellinger goto send_pg; 1184e48354ceSNicholas Bellinger } 1185e48354ceSNicholas Bellinger 1186e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1187e48354ceSNicholas Bellinger tx_sent); 1188e48354ceSNicholas Bellinger return -1; 1189e48354ceSNicholas Bellinger } 1190e48354ceSNicholas Bellinger 1191e48354ceSNicholas Bellinger data_len -= sub_len; 1192e48354ceSNicholas Bellinger offset = 0; 1193e48354ceSNicholas Bellinger sg = sg_next(sg); 1194e48354ceSNicholas Bellinger } 1195e48354ceSNicholas Bellinger 1196e48354ceSNicholas Bellinger send_padding: 1197e48354ceSNicholas Bellinger if (cmd->padding) { 119840b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1199e48354ceSNicholas Bellinger 1200e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1201e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1202e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1203e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1204e48354ceSNicholas Bellinger goto send_padding; 1205e48354ceSNicholas Bellinger } 1206e48354ceSNicholas Bellinger return -1; 1207e48354ceSNicholas Bellinger } 1208e48354ceSNicholas Bellinger } 1209e48354ceSNicholas Bellinger 1210e48354ceSNicholas Bellinger send_datacrc: 1211e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 121240b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1213e48354ceSNicholas Bellinger 1214e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1215e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1216e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1217e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1218e48354ceSNicholas Bellinger goto send_datacrc; 1219e48354ceSNicholas Bellinger } 1220e48354ceSNicholas Bellinger return -1; 1221e48354ceSNicholas Bellinger } 1222e48354ceSNicholas Bellinger } 1223e48354ceSNicholas Bellinger 1224e48354ceSNicholas Bellinger return 0; 1225e48354ceSNicholas Bellinger } 1226e48354ceSNicholas Bellinger 1227e48354ceSNicholas Bellinger /* 1228e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1229e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1230e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1231e48354ceSNicholas Bellinger * 1232e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1233e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1234e48354ceSNicholas Bellinger */ 1235e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1236e48354ceSNicholas Bellinger { 1237e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1238baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1239e48354ceSNicholas Bellinger 1240baa4d64bSNicholas Bellinger login->login_failed = 1; 1241e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1242e48354ceSNicholas Bellinger 124368349756SNicholas Bellinger memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 124468349756SNicholas Bellinger 1245baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1246e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1247e48354ceSNicholas Bellinger hdr->status_class = status_class; 1248e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 124966c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1250e48354ceSNicholas Bellinger 1251baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1252e48354ceSNicholas Bellinger } 1253e48354ceSNicholas Bellinger 1254e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1255e48354ceSNicholas Bellinger { 1256e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1257e48354ceSNicholas Bellinger 1258e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1259e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1260e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1261e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1262e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1263e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1264e48354ceSNicholas Bellinger 1265e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1266e48354ceSNicholas Bellinger } 1267e48354ceSNicholas Bellinger 1268e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1269e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1270e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1271e48354ceSNicholas Bellinger { 1272e5a4b0bbSAl Viro int data = count->data_length, rx_loop = 0, total_rx = 0; 1273e48354ceSNicholas Bellinger struct msghdr msg; 1274e48354ceSNicholas Bellinger 1275e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1276e48354ceSNicholas Bellinger return -1; 1277e48354ceSNicholas Bellinger 1278e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1279e5a4b0bbSAl Viro iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, 1280e5a4b0bbSAl Viro count->iov, count->iov_count, data); 1281e48354ceSNicholas Bellinger 12822da62906SAl Viro while (msg_data_left(&msg)) { 12832da62906SAl Viro rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1284e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1285e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1286e48354ceSNicholas Bellinger rx_loop, total_rx); 1287e48354ceSNicholas Bellinger return rx_loop; 1288e48354ceSNicholas Bellinger } 1289e48354ceSNicholas Bellinger total_rx += rx_loop; 1290e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1291e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1292e48354ceSNicholas Bellinger } 1293e48354ceSNicholas Bellinger 1294e48354ceSNicholas Bellinger return total_rx; 1295e48354ceSNicholas Bellinger } 1296e48354ceSNicholas Bellinger 1297e48354ceSNicholas Bellinger int rx_data( 1298e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1299e48354ceSNicholas Bellinger struct kvec *iov, 1300e48354ceSNicholas Bellinger int iov_count, 1301e48354ceSNicholas Bellinger int data) 1302e48354ceSNicholas Bellinger { 1303e48354ceSNicholas Bellinger struct iscsi_data_count c; 1304e48354ceSNicholas Bellinger 1305e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1306e48354ceSNicholas Bellinger return -1; 1307e48354ceSNicholas Bellinger 1308e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1309e48354ceSNicholas Bellinger c.iov = iov; 1310e48354ceSNicholas Bellinger c.iov_count = iov_count; 1311e48354ceSNicholas Bellinger c.data_length = data; 1312e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1313e48354ceSNicholas Bellinger 1314e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1315e48354ceSNicholas Bellinger } 1316e48354ceSNicholas Bellinger 1317e48354ceSNicholas Bellinger int tx_data( 1318e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1319e48354ceSNicholas Bellinger struct kvec *iov, 1320e48354ceSNicholas Bellinger int iov_count, 1321e48354ceSNicholas Bellinger int data) 1322e48354ceSNicholas Bellinger { 13234113e47bSAl Viro struct msghdr msg; 13244113e47bSAl Viro int total_tx = 0; 1325e48354ceSNicholas Bellinger 1326e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1327e48354ceSNicholas Bellinger return -1; 1328e48354ceSNicholas Bellinger 13294113e47bSAl Viro if (data <= 0) { 13304113e47bSAl Viro pr_err("Data length is: %d\n", data); 13314113e47bSAl Viro return -1; 13324113e47bSAl Viro } 1333e48354ceSNicholas Bellinger 13344113e47bSAl Viro memset(&msg, 0, sizeof(struct msghdr)); 13354113e47bSAl Viro 13364113e47bSAl Viro iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, 13374113e47bSAl Viro iov, iov_count, data); 13384113e47bSAl Viro 13394113e47bSAl Viro while (msg_data_left(&msg)) { 13404113e47bSAl Viro int tx_loop = sock_sendmsg(conn->sock, &msg); 13414113e47bSAl Viro if (tx_loop <= 0) { 13424113e47bSAl Viro pr_debug("tx_loop: %d total_tx %d\n", 13434113e47bSAl Viro tx_loop, total_tx); 13444113e47bSAl Viro return tx_loop; 13454113e47bSAl Viro } 13464113e47bSAl Viro total_tx += tx_loop; 13474113e47bSAl Viro pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 13484113e47bSAl Viro tx_loop, total_tx, data); 13494113e47bSAl Viro } 13504113e47bSAl Viro 13514113e47bSAl Viro return total_tx; 1352e48354ceSNicholas Bellinger } 1353e48354ceSNicholas Bellinger 1354e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1355e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1356e48354ceSNicholas Bellinger u8 status_class, 1357e48354ceSNicholas Bellinger u8 status_detail) 1358e48354ceSNicholas Bellinger { 1359e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1360e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1361e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1362e48354ceSNicholas Bellinger 1363e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1364e48354ceSNicholas Bellinger if (!tiqn) 1365e48354ceSNicholas Bellinger return; 1366e48354ceSNicholas Bellinger 1367e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1368e48354ceSNicholas Bellinger 1369e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1370e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1371e48354ceSNicholas Bellinger ls->accepts++; 1372e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1373e48354ceSNicholas Bellinger ls->redirects++; 1374e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1375e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1376e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1377e48354ceSNicholas Bellinger ls->authenticate_fails++; 1378e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1379e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1380e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1381e48354ceSNicholas Bellinger ls->authorize_fails++; 1382e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1383e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1384e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1385e48354ceSNicholas Bellinger ls->negotiate_fails++; 1386e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1387e48354ceSNicholas Bellinger } else { 1388e48354ceSNicholas Bellinger ls->other_fails++; 1389e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1390e48354ceSNicholas Bellinger } 1391e48354ceSNicholas Bellinger 1392e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1393e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1394e48354ceSNicholas Bellinger if (conn->param_list) 1395e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1396e48354ceSNicholas Bellinger conn->param_list); 1397fdc84d11SJoern Engel strlcpy(ls->last_intr_fail_name, 1398fdc84d11SJoern Engel (intrname ? intrname->value : "Unknown"), 1399fdc84d11SJoern Engel sizeof(ls->last_intr_fail_name)); 1400e48354ceSNicholas Bellinger 1401baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1402baa4d64bSNicholas Bellinger 1403dc58f760SAndy Grover ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1404e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1405e48354ceSNicholas Bellinger } 1406e48354ceSNicholas Bellinger 1407e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1408e48354ceSNicholas Bellinger } 1409e48354ceSNicholas Bellinger 1410e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1411e48354ceSNicholas Bellinger { 1412e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1413e48354ceSNicholas Bellinger 141417c61ad6SNicholas Bellinger if (!conn) 1415e48354ceSNicholas Bellinger return NULL; 1416e48354ceSNicholas Bellinger 141717c61ad6SNicholas Bellinger tpg = conn->tpg; 1418e48354ceSNicholas Bellinger if (!tpg) 1419e48354ceSNicholas Bellinger return NULL; 1420e48354ceSNicholas Bellinger 1421e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1422e48354ceSNicholas Bellinger return NULL; 1423e48354ceSNicholas Bellinger 1424e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1425e48354ceSNicholas Bellinger } 1426