1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2e48354ceSNicholas Bellinger /******************************************************************************* 3e48354ceSNicholas Bellinger * This file contains the iSCSI Target specific utility functions. 4e48354ceSNicholas Bellinger * 54c76251eSNicholas Bellinger * (c) Copyright 2007-2013 Datera, Inc. 6e48354ceSNicholas Bellinger * 7e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 8e48354ceSNicholas Bellinger * 9e48354ceSNicholas Bellinger ******************************************************************************/ 10e48354ceSNicholas Bellinger 11e48354ceSNicholas Bellinger #include <linux/list.h> 1210e9cbb6SMatthew Wilcox #include <linux/sched/signal.h> 138dcf07beSBart Van Assche #include <net/ipv6.h> /* ipv6_addr_equal() */ 14e48354ceSNicholas Bellinger #include <scsi/scsi_tcq.h> 15e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 16e48354ceSNicholas Bellinger #include <target/target_core_base.h> 17c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 18baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 19e48354ceSNicholas Bellinger 2067f091f2SSagi Grimberg #include <target/iscsi/iscsi_target_core.h> 21e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 22e48354ceSNicholas Bellinger #include "iscsi_target_seq_pdu_list.h" 23e48354ceSNicholas Bellinger #include "iscsi_target_datain_values.h" 24e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 25e48354ceSNicholas Bellinger #include "iscsi_target_erl1.h" 26e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 27e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 28e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 29e48354ceSNicholas Bellinger #include "iscsi_target.h" 30e48354ceSNicholas Bellinger 31e48354ceSNicholas Bellinger #define PRINT_BUFF(buff, len) \ 32e48354ceSNicholas Bellinger { \ 33e48354ceSNicholas Bellinger int zzz; \ 34e48354ceSNicholas Bellinger \ 35e48354ceSNicholas Bellinger pr_debug("%d:\n", __LINE__); \ 36e48354ceSNicholas Bellinger for (zzz = 0; zzz < len; zzz++) { \ 37e48354ceSNicholas Bellinger if (zzz % 16 == 0) { \ 38e48354ceSNicholas Bellinger if (zzz) \ 39e48354ceSNicholas Bellinger pr_debug("\n"); \ 40e48354ceSNicholas Bellinger pr_debug("%4i: ", zzz); \ 41e48354ceSNicholas Bellinger } \ 42e48354ceSNicholas Bellinger pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 43e48354ceSNicholas Bellinger } \ 44e48354ceSNicholas Bellinger if ((len + 1) % 16) \ 45e48354ceSNicholas Bellinger pr_debug("\n"); \ 46e48354ceSNicholas Bellinger } 47e48354ceSNicholas Bellinger 48e48354ceSNicholas Bellinger extern struct list_head g_tiqn_list; 49e48354ceSNicholas Bellinger extern spinlock_t tiqn_lock; 50e48354ceSNicholas Bellinger 51e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 52e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 53e48354ceSNicholas Bellinger u32 offset, 54e48354ceSNicholas Bellinger u32 xfer_len, 55e48354ceSNicholas Bellinger int recovery, 56e48354ceSNicholas Bellinger u32 r2t_sn) 57e48354ceSNicholas Bellinger { 58e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 59e48354ceSNicholas Bellinger 60618baaf7SBart Van Assche lockdep_assert_held(&cmd->r2t_lock); 61618baaf7SBart Van Assche 6296e8e26dSBart Van Assche WARN_ON_ONCE((s32)xfer_len < 0); 6396e8e26dSBart Van Assche 64e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 65e48354ceSNicholas Bellinger if (!r2t) { 66e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 67e48354ceSNicholas Bellinger return -1; 68e48354ceSNicholas Bellinger } 69e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 70e48354ceSNicholas Bellinger 71e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 72e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 73e48354ceSNicholas Bellinger r2t->offset = offset; 74e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 75e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 76e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 77e48354ceSNicholas Bellinger 78e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 79e48354ceSNicholas Bellinger 80e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 81e48354ceSNicholas Bellinger return 0; 82e48354ceSNicholas Bellinger } 83e48354ceSNicholas Bellinger 84e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 85e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 86e48354ceSNicholas Bellinger u32 offset, 87e48354ceSNicholas Bellinger u32 length) 88e48354ceSNicholas Bellinger { 89e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 90e48354ceSNicholas Bellinger 91e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 92e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 93e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 94e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 95e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 96e48354ceSNicholas Bellinger return r2t; 97e48354ceSNicholas Bellinger } 98e48354ceSNicholas Bellinger } 99e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 100e48354ceSNicholas Bellinger 101e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 102e48354ceSNicholas Bellinger " %u\n", offset, length); 103e48354ceSNicholas Bellinger return NULL; 104e48354ceSNicholas Bellinger } 105e48354ceSNicholas Bellinger 106e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 107e48354ceSNicholas Bellinger { 108e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 109e48354ceSNicholas Bellinger 110e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 111e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 112e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 113e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 114e48354ceSNicholas Bellinger return r2t; 115e48354ceSNicholas Bellinger } 116e48354ceSNicholas Bellinger } 117e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 118e48354ceSNicholas Bellinger 119e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 120e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 121e48354ceSNicholas Bellinger return NULL; 122e48354ceSNicholas Bellinger } 123e48354ceSNicholas Bellinger 124e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 125e48354ceSNicholas Bellinger { 126618baaf7SBart Van Assche lockdep_assert_held(&cmd->r2t_lock); 127618baaf7SBart Van Assche 128e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 129e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 130e48354ceSNicholas Bellinger } 131e48354ceSNicholas Bellinger 132e48354ceSNicholas Bellinger void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 133e48354ceSNicholas Bellinger { 134e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 135e48354ceSNicholas Bellinger 136e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 137e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 138e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 139e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 140e48354ceSNicholas Bellinger } 141e48354ceSNicholas Bellinger 14210e9cbb6SMatthew Wilcox static int iscsit_wait_for_tag(struct se_session *se_sess, int state, int *cpup) 14310e9cbb6SMatthew Wilcox { 14410e9cbb6SMatthew Wilcox int tag = -1; 1455d2ee712SJens Axboe DEFINE_SBQ_WAIT(wait); 14610e9cbb6SMatthew Wilcox struct sbq_wait_state *ws; 1475d2ee712SJens Axboe struct sbitmap_queue *sbq; 14810e9cbb6SMatthew Wilcox 14910e9cbb6SMatthew Wilcox if (state == TASK_RUNNING) 15010e9cbb6SMatthew Wilcox return tag; 15110e9cbb6SMatthew Wilcox 1525d2ee712SJens Axboe sbq = &se_sess->sess_tag_pool; 1535d2ee712SJens Axboe ws = &sbq->ws[0]; 15410e9cbb6SMatthew Wilcox for (;;) { 1555d2ee712SJens Axboe sbitmap_prepare_to_wait(sbq, ws, &wait, state); 15610e9cbb6SMatthew Wilcox if (signal_pending_state(state, current)) 15710e9cbb6SMatthew Wilcox break; 1585d2ee712SJens Axboe tag = sbitmap_queue_get(sbq, cpup); 15910e9cbb6SMatthew Wilcox if (tag >= 0) 16010e9cbb6SMatthew Wilcox break; 16110e9cbb6SMatthew Wilcox schedule(); 16210e9cbb6SMatthew Wilcox } 16310e9cbb6SMatthew Wilcox 1645d2ee712SJens Axboe sbitmap_finish_wait(sbq, ws, &wait); 16510e9cbb6SMatthew Wilcox return tag; 16610e9cbb6SMatthew Wilcox } 16710e9cbb6SMatthew Wilcox 168e48354ceSNicholas Bellinger /* 169e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 170e48354ceSNicholas Bellinger * iSCSI NopINs. 171e48354ceSNicholas Bellinger */ 172676687c6SNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) 173e48354ceSNicholas Bellinger { 174e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 175988e3a85SNicholas Bellinger struct se_session *se_sess = conn->sess->se_sess; 17610e9cbb6SMatthew Wilcox int size, tag, cpu; 177e48354ceSNicholas Bellinger 17810e9cbb6SMatthew Wilcox tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); 17910e9cbb6SMatthew Wilcox if (tag < 0) 18010e9cbb6SMatthew Wilcox tag = iscsit_wait_for_tag(se_sess, state, &cpu); 1816f6b5d1eSKent Overstreet if (tag < 0) 1826f6b5d1eSKent Overstreet return NULL; 1836f6b5d1eSKent Overstreet 184988e3a85SNicholas Bellinger size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; 185988e3a85SNicholas Bellinger cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); 186988e3a85SNicholas Bellinger memset(cmd, 0, size); 187988e3a85SNicholas Bellinger 188988e3a85SNicholas Bellinger cmd->se_cmd.map_tag = tag; 18910e9cbb6SMatthew Wilcox cmd->se_cmd.map_cpu = cpu; 190e48354ceSNicholas Bellinger cmd->conn = conn; 1914412a671SBart Van Assche cmd->data_direction = DMA_NONE; 1922fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 193e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 194e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 195e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 196e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 197e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 198e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 199e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 200f7c9564aSKees Cook timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0); 201e48354ceSNicholas Bellinger 202e48354ceSNicholas Bellinger return cmd; 203e48354ceSNicholas Bellinger } 204cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 205e48354ceSNicholas Bellinger 206e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 207e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 208e48354ceSNicholas Bellinger u32 seq_send_order) 209e48354ceSNicholas Bellinger { 210e48354ceSNicholas Bellinger u32 i; 211e48354ceSNicholas Bellinger 212e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 213e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 214e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 215e48354ceSNicholas Bellinger 216e48354ceSNicholas Bellinger return NULL; 217e48354ceSNicholas Bellinger } 218e48354ceSNicholas Bellinger 219e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 220e48354ceSNicholas Bellinger { 221e48354ceSNicholas Bellinger u32 i; 222e48354ceSNicholas Bellinger 223e48354ceSNicholas Bellinger if (!cmd->seq_list) { 224e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 225e48354ceSNicholas Bellinger return NULL; 226e48354ceSNicholas Bellinger } 227e48354ceSNicholas Bellinger 228e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 229e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 230e48354ceSNicholas Bellinger continue; 231e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 232e48354ceSNicholas Bellinger cmd->seq_send_order++; 233e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 234e48354ceSNicholas Bellinger } 235e48354ceSNicholas Bellinger } 236e48354ceSNicholas Bellinger 237e48354ceSNicholas Bellinger return NULL; 238e48354ceSNicholas Bellinger } 239e48354ceSNicholas Bellinger 240e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 241e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 242e48354ceSNicholas Bellinger u32 r2t_sn) 243e48354ceSNicholas Bellinger { 244e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 245e48354ceSNicholas Bellinger 246e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 247e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 248e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 249e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 250e48354ceSNicholas Bellinger return r2t; 251e48354ceSNicholas Bellinger } 252e48354ceSNicholas Bellinger } 253e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 254e48354ceSNicholas Bellinger 255e48354ceSNicholas Bellinger return NULL; 256e48354ceSNicholas Bellinger } 257e48354ceSNicholas Bellinger 258e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 259e48354ceSNicholas Bellinger { 260109e2381SRoland Dreier u32 max_cmdsn; 261e48354ceSNicholas Bellinger int ret; 262e48354ceSNicholas Bellinger 263e48354ceSNicholas Bellinger /* 264e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 265e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 266e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 267e48354ceSNicholas Bellinger * CRC failures. 268e48354ceSNicholas Bellinger */ 269109e2381SRoland Dreier max_cmdsn = atomic_read(&sess->max_cmd_sn); 270109e2381SRoland Dreier if (iscsi_sna_gt(cmdsn, max_cmdsn)) { 271e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 272109e2381SRoland Dreier " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); 273ea7e32beSNicholas Bellinger ret = CMDSN_MAXCMDSN_OVERRUN; 274e48354ceSNicholas Bellinger 275e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 276e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 277e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 278e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 279e48354ceSNicholas Bellinger sess->exp_cmd_sn); 280e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 281e48354ceSNicholas Bellinger 282e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 283e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 284e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 285e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 286e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 287e48354ceSNicholas Bellinger 288e48354ceSNicholas Bellinger } else { 289e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 290e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 291e48354ceSNicholas Bellinger sess->exp_cmd_sn); 292e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 293e48354ceSNicholas Bellinger } 294e48354ceSNicholas Bellinger 295e48354ceSNicholas Bellinger return ret; 296e48354ceSNicholas Bellinger } 297e48354ceSNicholas Bellinger 298e48354ceSNicholas Bellinger /* 299e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 300e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 301e48354ceSNicholas Bellinger */ 302561bf158SNicholas Bellinger int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 303561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 304e48354ceSNicholas Bellinger { 305561bf158SNicholas Bellinger int ret, cmdsn_ret; 306561bf158SNicholas Bellinger bool reject = false; 307561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 308e48354ceSNicholas Bellinger 309e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 310e48354ceSNicholas Bellinger 31150e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 312e48354ceSNicholas Bellinger switch (cmdsn_ret) { 313e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 314e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 315e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 316e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 317561bf158SNicholas Bellinger else if (ret < 0) { 318561bf158SNicholas Bellinger reject = true; 319561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 320561bf158SNicholas Bellinger } 321e48354ceSNicholas Bellinger break; 322e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 32350e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 324561bf158SNicholas Bellinger if (ret < 0) { 325561bf158SNicholas Bellinger reject = true; 326561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 327561bf158SNicholas Bellinger break; 328561bf158SNicholas Bellinger } 329561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 330e48354ceSNicholas Bellinger break; 331e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 332ea7e32beSNicholas Bellinger case CMDSN_MAXCMDSN_OVERRUN: 333ea7e32beSNicholas Bellinger default: 334e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 335e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 336ea7e32beSNicholas Bellinger /* 337ea7e32beSNicholas Bellinger * Existing callers for iscsit_sequence_cmd() will silently 338ea7e32beSNicholas Bellinger * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 339ea7e32beSNicholas Bellinger * return for CMDSN_MAXCMDSN_OVERRUN as well.. 340ea7e32beSNicholas Bellinger */ 341ea7e32beSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 342e48354ceSNicholas Bellinger break; 343e48354ceSNicholas Bellinger } 344e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 345e48354ceSNicholas Bellinger 346561bf158SNicholas Bellinger if (reject) 347561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 348561bf158SNicholas Bellinger 349e48354ceSNicholas Bellinger return ret; 350e48354ceSNicholas Bellinger } 3513e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 352e48354ceSNicholas Bellinger 353e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 354e48354ceSNicholas Bellinger { 355e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 356e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 357e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 358e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 359e48354ceSNicholas Bellinger 360e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 361e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 362e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 363e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 364e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 365e48354ceSNicholas Bellinger return -1; 366e48354ceSNicholas Bellinger } 367e48354ceSNicholas Bellinger 368e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 369e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 370e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 371e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 372e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 373e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 374e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 375e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 376e48354ceSNicholas Bellinger return -1; 377e48354ceSNicholas Bellinger } 378e48354ceSNicholas Bellinger 379e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 380e48354ceSNicholas Bellinger return 0; 381e48354ceSNicholas Bellinger 382ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 383e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 384e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 385e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 386e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 387e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 388e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 389ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 390e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 391e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 392e48354ceSNicholas Bellinger return -1; 393e48354ceSNicholas Bellinger } 394e48354ceSNicholas Bellinger return 0; 395e48354ceSNicholas Bellinger } 396e48354ceSNicholas Bellinger 397e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 398e48354ceSNicholas Bellinger struct iscsi_conn *conn, 39966c7db68SChristoph Hellwig itt_t init_task_tag) 400e48354ceSNicholas Bellinger { 401e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 402e48354ceSNicholas Bellinger 403e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4042fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 405e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 406e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 407e48354ceSNicholas Bellinger return cmd; 408e48354ceSNicholas Bellinger } 409e48354ceSNicholas Bellinger } 410e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 411e48354ceSNicholas Bellinger 412e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 413e48354ceSNicholas Bellinger init_task_tag, conn->cid); 414e48354ceSNicholas Bellinger return NULL; 415e48354ceSNicholas Bellinger } 416e4f4e801SSagi Grimberg EXPORT_SYMBOL(iscsit_find_cmd_from_itt); 417e48354ceSNicholas Bellinger 418e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 419e48354ceSNicholas Bellinger struct iscsi_conn *conn, 42066c7db68SChristoph Hellwig itt_t init_task_tag, 421e48354ceSNicholas Bellinger u32 length) 422e48354ceSNicholas Bellinger { 423e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 424e48354ceSNicholas Bellinger 425e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4262fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 4273687db88SNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 4283687db88SNicholas Bellinger continue; 429e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 430e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 431e48354ceSNicholas Bellinger return cmd; 432e48354ceSNicholas Bellinger } 433e48354ceSNicholas Bellinger } 434e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 435e48354ceSNicholas Bellinger 436e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 437e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 438e48354ceSNicholas Bellinger if (length) 439e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 440e48354ceSNicholas Bellinger 441e48354ceSNicholas Bellinger return NULL; 442e48354ceSNicholas Bellinger } 4439a584bf9SVarun Prakash EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); 444e48354ceSNicholas Bellinger 445e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 446e48354ceSNicholas Bellinger struct iscsi_conn *conn, 447e48354ceSNicholas Bellinger u32 targ_xfer_tag) 448e48354ceSNicholas Bellinger { 449e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 450e48354ceSNicholas Bellinger 451e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4522fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 453e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 454e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 455e48354ceSNicholas Bellinger return cmd; 456e48354ceSNicholas Bellinger } 457e48354ceSNicholas Bellinger } 458e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 459e48354ceSNicholas Bellinger 460e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 461e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 462e48354ceSNicholas Bellinger return NULL; 463e48354ceSNicholas Bellinger } 464e48354ceSNicholas Bellinger 465e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 466e48354ceSNicholas Bellinger struct iscsi_session *sess, 467e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 468e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 46966c7db68SChristoph Hellwig itt_t init_task_tag) 470e48354ceSNicholas Bellinger { 471e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 472e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 473e48354ceSNicholas Bellinger /* 474e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 475e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 476e48354ceSNicholas Bellinger */ 477e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 478e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 479e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4802fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 481e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 482e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 483e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 484e48354ceSNicholas Bellinger 485e48354ceSNicholas Bellinger *cr_ptr = cr; 486e48354ceSNicholas Bellinger *cmd_ptr = cmd; 487e48354ceSNicholas Bellinger return -2; 488e48354ceSNicholas Bellinger } 489e48354ceSNicholas Bellinger } 490e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 491e48354ceSNicholas Bellinger } 492e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 493e48354ceSNicholas Bellinger /* 494e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 495e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 496e48354ceSNicholas Bellinger */ 497e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 498e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 499e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 5002fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 501e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 502e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 503e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 504e48354ceSNicholas Bellinger 505e48354ceSNicholas Bellinger *cr_ptr = cr; 506e48354ceSNicholas Bellinger *cmd_ptr = cmd; 507e48354ceSNicholas Bellinger return 0; 508e48354ceSNicholas Bellinger } 509e48354ceSNicholas Bellinger } 510e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 511e48354ceSNicholas Bellinger } 512e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 513e48354ceSNicholas Bellinger 514e48354ceSNicholas Bellinger return -1; 515e48354ceSNicholas Bellinger } 516e48354ceSNicholas Bellinger 517e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 518e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 519e48354ceSNicholas Bellinger struct iscsi_conn *conn, 520e48354ceSNicholas Bellinger u8 state) 521e48354ceSNicholas Bellinger { 522e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 523e48354ceSNicholas Bellinger 524e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 525e48354ceSNicholas Bellinger if (!qr) { 526e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 527e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 528e48354ceSNicholas Bellinger return; 529e48354ceSNicholas Bellinger } 530e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 531e48354ceSNicholas Bellinger qr->cmd = cmd; 532e48354ceSNicholas Bellinger qr->state = state; 533e48354ceSNicholas Bellinger 534e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 535e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 536e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 537e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 538e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 539e48354ceSNicholas Bellinger 540d5627acbSRoland Dreier wake_up(&conn->queues_wq); 541e48354ceSNicholas Bellinger } 542d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); 543e48354ceSNicholas Bellinger 544e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 545e48354ceSNicholas Bellinger { 546e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 547e48354ceSNicholas Bellinger 548e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 549e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 550e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 551e48354ceSNicholas Bellinger return NULL; 552e48354ceSNicholas Bellinger } 5531f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5541f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 555e48354ceSNicholas Bellinger 556e48354ceSNicholas Bellinger list_del(&qr->qr_list); 557e48354ceSNicholas Bellinger if (qr->cmd) 558e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 559e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 560e48354ceSNicholas Bellinger 561e48354ceSNicholas Bellinger return qr; 562e48354ceSNicholas Bellinger } 563e48354ceSNicholas Bellinger 564e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 565e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 566e48354ceSNicholas Bellinger struct iscsi_conn *conn) 567e48354ceSNicholas Bellinger { 568e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 569e48354ceSNicholas Bellinger 570e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 571e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 572e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 573e48354ceSNicholas Bellinger return; 574e48354ceSNicholas Bellinger } 575e48354ceSNicholas Bellinger 576e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 577e48354ceSNicholas Bellinger if (qr->cmd != cmd) 578e48354ceSNicholas Bellinger continue; 579e48354ceSNicholas Bellinger 580e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 581e48354ceSNicholas Bellinger list_del(&qr->qr_list); 582e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 583e48354ceSNicholas Bellinger } 584e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 585e48354ceSNicholas Bellinger 586e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 587e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 588e48354ceSNicholas Bellinger cmd->init_task_tag, 589e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 590e48354ceSNicholas Bellinger } 591e48354ceSNicholas Bellinger } 592e48354ceSNicholas Bellinger 593a4467018SNicholas Bellinger int iscsit_add_cmd_to_response_queue( 594e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 595e48354ceSNicholas Bellinger struct iscsi_conn *conn, 596e48354ceSNicholas Bellinger u8 state) 597e48354ceSNicholas Bellinger { 598e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 599e48354ceSNicholas Bellinger 600e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 601e48354ceSNicholas Bellinger if (!qr) { 602e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 603e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 604a4467018SNicholas Bellinger return -ENOMEM; 605e48354ceSNicholas Bellinger } 606e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 607e48354ceSNicholas Bellinger qr->cmd = cmd; 608e48354ceSNicholas Bellinger qr->state = state; 609e48354ceSNicholas Bellinger 610e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 611e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 612e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 613e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 614e48354ceSNicholas Bellinger 615d5627acbSRoland Dreier wake_up(&conn->queues_wq); 616a4467018SNicholas Bellinger return 0; 617e48354ceSNicholas Bellinger } 618e48354ceSNicholas Bellinger 619e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 620e48354ceSNicholas Bellinger { 621e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 622e48354ceSNicholas Bellinger 623e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 624e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 625e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 626e48354ceSNicholas Bellinger return NULL; 627e48354ceSNicholas Bellinger } 628e48354ceSNicholas Bellinger 6291f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6301f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 631e48354ceSNicholas Bellinger 632e48354ceSNicholas Bellinger list_del(&qr->qr_list); 633e48354ceSNicholas Bellinger if (qr->cmd) 634e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 635e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 636e48354ceSNicholas Bellinger 637e48354ceSNicholas Bellinger return qr; 638e48354ceSNicholas Bellinger } 639e48354ceSNicholas Bellinger 640e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 641e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 642e48354ceSNicholas Bellinger struct iscsi_conn *conn) 643e48354ceSNicholas Bellinger { 644e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 645e48354ceSNicholas Bellinger 646e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 647e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 648e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 649e48354ceSNicholas Bellinger return; 650e48354ceSNicholas Bellinger } 651e48354ceSNicholas Bellinger 652e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 653e48354ceSNicholas Bellinger qr_list) { 654e48354ceSNicholas Bellinger if (qr->cmd != cmd) 655e48354ceSNicholas Bellinger continue; 656e48354ceSNicholas Bellinger 657e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 658e48354ceSNicholas Bellinger list_del(&qr->qr_list); 659e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 660e48354ceSNicholas Bellinger } 661e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 662e48354ceSNicholas Bellinger 663e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 664e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 665e48354ceSNicholas Bellinger cmd->init_task_tag, 666e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 667e48354ceSNicholas Bellinger } 668e48354ceSNicholas Bellinger } 669e48354ceSNicholas Bellinger 670d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 671d5627acbSRoland Dreier { 672d5627acbSRoland Dreier bool empty; 673d5627acbSRoland Dreier 674d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 675d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 676d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 677d5627acbSRoland Dreier 678d5627acbSRoland Dreier if (!empty) 679d5627acbSRoland Dreier return empty; 680d5627acbSRoland Dreier 681d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 682d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 683d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 684d5627acbSRoland Dreier 685d5627acbSRoland Dreier return empty; 686d5627acbSRoland Dreier } 687d5627acbSRoland Dreier 688e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 689e48354ceSNicholas Bellinger { 690e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 691e48354ceSNicholas Bellinger 692e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 693e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 694e48354ceSNicholas Bellinger list_del(&qr->qr_list); 695e48354ceSNicholas Bellinger if (qr->cmd) 696e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 697e48354ceSNicholas Bellinger 698e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 699e48354ceSNicholas Bellinger } 700e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 701e48354ceSNicholas Bellinger 702e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 703e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 704e48354ceSNicholas Bellinger qr_list) { 705e48354ceSNicholas Bellinger list_del(&qr->qr_list); 706e48354ceSNicholas Bellinger if (qr->cmd) 707e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 708e48354ceSNicholas Bellinger 709e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 710e48354ceSNicholas Bellinger } 711e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 712e48354ceSNicholas Bellinger } 713e48354ceSNicholas Bellinger 714e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 715e48354ceSNicholas Bellinger { 716988e3a85SNicholas Bellinger struct iscsi_session *sess; 717988e3a85SNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 718988e3a85SNicholas Bellinger 7196eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 7206eaf69e4SBart Van Assche 721988e3a85SNicholas Bellinger if (cmd->conn) 722988e3a85SNicholas Bellinger sess = cmd->conn->sess; 723988e3a85SNicholas Bellinger else 724988e3a85SNicholas Bellinger sess = cmd->sess; 725988e3a85SNicholas Bellinger 726988e3a85SNicholas Bellinger BUG_ON(!sess || !sess->se_sess); 727988e3a85SNicholas Bellinger 728e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 729e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 730e48354ceSNicholas Bellinger kfree(cmd->seq_list); 731e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 7320ca650c1SBart Van Assche kfree(cmd->overflow_buf); 733e48354ceSNicholas Bellinger kfree(cmd->iov_data); 7349864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 735e48354ceSNicholas Bellinger 73683c2b54bSMatthew Wilcox target_free_tag(sess->se_sess, se_cmd); 737e48354ceSNicholas Bellinger } 738d703ce2fSNicholas Bellinger EXPORT_SYMBOL(iscsit_release_cmd); 739e48354ceSNicholas Bellinger 7404412a671SBart Van Assche void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool check_queues) 741d270190aSNicholas Bellinger { 742aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 743aafc9d15SNicholas Bellinger 7446eaf69e4SBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 7456eaf69e4SBart Van Assche 746aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 747aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 748aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 749aafc9d15SNicholas Bellinger } 750aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 751aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 752aafc9d15SNicholas Bellinger 753aafc9d15SNicholas Bellinger if (conn && check_queues) { 754aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 755aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 756aafc9d15SNicholas Bellinger } 7577ec811a8SVarun Prakash 7581e65cc16SBart Van Assche if (conn && conn->conn_transport->iscsit_unmap_cmd) 7591e65cc16SBart Van Assche conn->conn_transport->iscsit_unmap_cmd(conn, cmd); 760aafc9d15SNicholas Bellinger } 761aafc9d15SNicholas Bellinger 762aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 763aafc9d15SNicholas Bellinger { 764d1c26857SBart Van Assche struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL; 765aafc9d15SNicholas Bellinger int rc; 7664412a671SBart Van Assche 767b0055acaSBart Van Assche WARN_ON(!list_empty(&cmd->i_conn_node)); 768b0055acaSBart Van Assche 7694412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 770d1c26857SBart Van Assche if (se_cmd) { 771efb2ea77SNicholas Bellinger rc = transport_generic_free_cmd(se_cmd, shutdown); 772c8a75afbSBart Van Assche if (!rc && shutdown && se_cmd->se_sess) { 773c8a75afbSBart Van Assche __iscsit_free_cmd(cmd, shutdown); 774afc16604SBart Van Assche target_put_sess_cmd(se_cmd); 775c8a75afbSBart Van Assche } 776d1c26857SBart Van Assche } else { 777d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 778d270190aSNicholas Bellinger } 779d270190aSNicholas Bellinger } 780d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_free_cmd); 781d270190aSNicholas Bellinger 782*f88a10f8SSebastian Andrzej Siewior bool iscsit_check_session_usage_count(struct iscsi_session *sess, 783*f88a10f8SSebastian Andrzej Siewior bool can_sleep) 784e48354ceSNicholas Bellinger { 785e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 786e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 787e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 788e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 789efc9d730SSebastian Andrzej Siewior if (!can_sleep) 790*f88a10f8SSebastian Andrzej Siewior return true; 791e48354ceSNicholas Bellinger 792e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 793*f88a10f8SSebastian Andrzej Siewior return false; 794e48354ceSNicholas Bellinger } 795e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 796e48354ceSNicholas Bellinger 797*f88a10f8SSebastian Andrzej Siewior return false; 798e48354ceSNicholas Bellinger } 799e48354ceSNicholas Bellinger 800e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 801e48354ceSNicholas Bellinger { 802e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 803e48354ceSNicholas Bellinger sess->session_usage_count--; 804e48354ceSNicholas Bellinger 805e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 806e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 807e48354ceSNicholas Bellinger 808e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 809e48354ceSNicholas Bellinger } 810e48354ceSNicholas Bellinger 811e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 812e48354ceSNicholas Bellinger { 813e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 814e48354ceSNicholas Bellinger sess->session_usage_count++; 815e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 816e48354ceSNicholas Bellinger } 817e48354ceSNicholas Bellinger 818e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 819e48354ceSNicholas Bellinger { 820e48354ceSNicholas Bellinger struct iscsi_conn *conn; 821e48354ceSNicholas Bellinger 822e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 823e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 824e48354ceSNicholas Bellinger if ((conn->cid == cid) && 825e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 826e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 827e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 828e48354ceSNicholas Bellinger return conn; 829e48354ceSNicholas Bellinger } 830e48354ceSNicholas Bellinger } 831e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 832e48354ceSNicholas Bellinger 833e48354ceSNicholas Bellinger return NULL; 834e48354ceSNicholas Bellinger } 835e48354ceSNicholas Bellinger 836e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 837e48354ceSNicholas Bellinger { 838e48354ceSNicholas Bellinger struct iscsi_conn *conn; 839e48354ceSNicholas Bellinger 840e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 841e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 842e48354ceSNicholas Bellinger if (conn->cid == cid) { 843e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 844e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 845e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 846e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 847e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 848e48354ceSNicholas Bellinger return conn; 849e48354ceSNicholas Bellinger } 850e48354ceSNicholas Bellinger } 851e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 852e48354ceSNicholas Bellinger 853e48354ceSNicholas Bellinger return NULL; 854e48354ceSNicholas Bellinger } 855e48354ceSNicholas Bellinger 856e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 857e48354ceSNicholas Bellinger { 858e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 859e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 860e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 861e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 862e48354ceSNicholas Bellinger 863e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 864e48354ceSNicholas Bellinger return; 865e48354ceSNicholas Bellinger } 866e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 867e48354ceSNicholas Bellinger } 868e48354ceSNicholas Bellinger 869e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 870e48354ceSNicholas Bellinger { 871e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 872e48354ceSNicholas Bellinger conn->conn_usage_count--; 873e48354ceSNicholas Bellinger 874e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 875e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 876e48354ceSNicholas Bellinger 877e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 878e48354ceSNicholas Bellinger } 879e48354ceSNicholas Bellinger 880e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 881e48354ceSNicholas Bellinger { 882e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 883e48354ceSNicholas Bellinger conn->conn_usage_count++; 884e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 885e48354ceSNicholas Bellinger } 886e48354ceSNicholas Bellinger 887e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 888e48354ceSNicholas Bellinger { 889e48354ceSNicholas Bellinger u8 state; 890e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 891e48354ceSNicholas Bellinger 892676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 893e48354ceSNicholas Bellinger if (!cmd) 894e48354ceSNicholas Bellinger return -1; 895e48354ceSNicholas Bellinger 896e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 897e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 898e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 89966c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 900c1e34b64SSagi Grimberg cmd->targ_xfer_tag = (want_response) ? 901c1e34b64SSagi Grimberg session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 902e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 9032fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 904e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 905e48354ceSNicholas Bellinger 906e48354ceSNicholas Bellinger if (want_response) 907e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 908e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 909e48354ceSNicholas Bellinger 910e48354ceSNicholas Bellinger return 0; 911e48354ceSNicholas Bellinger } 912e48354ceSNicholas Bellinger 913f7c9564aSKees Cook void iscsit_handle_nopin_response_timeout(struct timer_list *t) 914e48354ceSNicholas Bellinger { 915f7c9564aSKees Cook struct iscsi_conn *conn = from_timer(conn, t, nopin_response_timer); 916c62ae300SDavid Disseldorp struct iscsi_session *sess = conn->sess; 917e48354ceSNicholas Bellinger 918e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 919e48354ceSNicholas Bellinger 920e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 921e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 922e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 923e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 924e48354ceSNicholas Bellinger return; 925e48354ceSNicholas Bellinger } 926e48354ceSNicholas Bellinger 927c62ae300SDavid Disseldorp pr_err("Did not receive response to NOPIN on CID: %hu, failing" 928c62ae300SDavid Disseldorp " connection for I_T Nexus %s,i,0x%6phN,%s,t,0x%02x\n", 929c62ae300SDavid Disseldorp conn->cid, sess->sess_ops->InitiatorName, sess->isid, 930c62ae300SDavid Disseldorp sess->tpg->tpg_tiqn->tiqn, (u32)sess->tpg->tpgt); 931e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 932e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 933e48354ceSNicholas Bellinger 934dce6190cSDavid Disseldorp iscsit_fill_cxn_timeout_err_stats(sess); 935e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 936e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 937e48354ceSNicholas Bellinger } 938e48354ceSNicholas Bellinger 939e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 940e48354ceSNicholas Bellinger { 941e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 942e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 943e48354ceSNicholas Bellinger 944e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 945e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 946e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 947e48354ceSNicholas Bellinger return; 948e48354ceSNicholas Bellinger } 949e48354ceSNicholas Bellinger 950e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 951e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 952e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 953e48354ceSNicholas Bellinger } 954e48354ceSNicholas Bellinger 955e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 956e48354ceSNicholas Bellinger { 957e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 958e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 959e48354ceSNicholas Bellinger 960e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 961e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 962e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 963e48354ceSNicholas Bellinger return; 964e48354ceSNicholas Bellinger } 965e48354ceSNicholas Bellinger 966e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 967e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 9688a47aa9dSBart Van Assche mod_timer(&conn->nopin_response_timer, 9698a47aa9dSBart Van Assche jiffies + na->nopin_response_timeout * HZ); 970e48354ceSNicholas Bellinger 971e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 972e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 973e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 974e48354ceSNicholas Bellinger } 975e48354ceSNicholas Bellinger 976e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 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 conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 984e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 985e48354ceSNicholas Bellinger 986e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 987e48354ceSNicholas Bellinger 988e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 989e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 990e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 991e48354ceSNicholas Bellinger } 992e48354ceSNicholas Bellinger 993f7c9564aSKees Cook void iscsit_handle_nopin_timeout(struct timer_list *t) 994e48354ceSNicholas Bellinger { 995f7c9564aSKees Cook struct iscsi_conn *conn = from_timer(conn, t, nopin_timer); 996e48354ceSNicholas Bellinger 997e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 998e48354ceSNicholas Bellinger 999e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1000e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1001e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1002e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1003e48354ceSNicholas Bellinger return; 1004e48354ceSNicholas Bellinger } 1005e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1006e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1007e48354ceSNicholas Bellinger 1008e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1009e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1010e48354ceSNicholas Bellinger } 1011e48354ceSNicholas Bellinger 1012e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1013e48354ceSNicholas Bellinger { 1014e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1015e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1016618baaf7SBart Van Assche 1017618baaf7SBart Van Assche lockdep_assert_held(&conn->nopin_timer_lock); 1018618baaf7SBart Van Assche 1019e48354ceSNicholas Bellinger /* 1020e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1021e48354ceSNicholas Bellinger */ 1022e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1023e48354ceSNicholas Bellinger return; 1024e48354ceSNicholas Bellinger 1025e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1026e48354ceSNicholas Bellinger return; 1027e48354ceSNicholas Bellinger 1028e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1029e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 10308a47aa9dSBart Van Assche mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); 1031e48354ceSNicholas Bellinger 1032e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1033e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1034e48354ceSNicholas Bellinger } 1035e48354ceSNicholas Bellinger 1036e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1037e48354ceSNicholas Bellinger { 1038e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1039aeb50279SMike Christie __iscsit_start_nopin_timer(conn); 1040e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1041e48354ceSNicholas Bellinger } 1042e48354ceSNicholas Bellinger 1043e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1044e48354ceSNicholas Bellinger { 1045e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1046e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1047e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1048e48354ceSNicholas Bellinger return; 1049e48354ceSNicholas Bellinger } 1050e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1051e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1052e48354ceSNicholas Bellinger 1053e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1054e48354ceSNicholas Bellinger 1055e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1056e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1057e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1058e48354ceSNicholas Bellinger } 1059e48354ceSNicholas Bellinger 1060e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1061e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1062e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1063e48354ceSNicholas Bellinger int use_misc) 1064e48354ceSNicholas Bellinger { 1065e48354ceSNicholas Bellinger int tx_sent, tx_size; 1066e48354ceSNicholas Bellinger u32 iov_count; 1067e48354ceSNicholas Bellinger struct kvec *iov; 1068e48354ceSNicholas Bellinger 1069e48354ceSNicholas Bellinger send_data: 1070e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1071e48354ceSNicholas Bellinger 1072e48354ceSNicholas Bellinger if (!use_misc) { 1073e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1074e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1075e48354ceSNicholas Bellinger } else { 1076e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1077e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1078e48354ceSNicholas Bellinger } 1079e48354ceSNicholas Bellinger 1080e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1081e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1082e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1083e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1084e48354ceSNicholas Bellinger goto send_data; 1085e48354ceSNicholas Bellinger } else 1086e48354ceSNicholas Bellinger return -1; 1087e48354ceSNicholas Bellinger } 1088e48354ceSNicholas Bellinger cmd->tx_size = 0; 1089e48354ceSNicholas Bellinger 1090e48354ceSNicholas Bellinger return 0; 1091e48354ceSNicholas Bellinger } 1092e48354ceSNicholas Bellinger 1093e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1094e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1095e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1096e48354ceSNicholas Bellinger { 1097e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1098e48354ceSNicholas Bellinger struct kvec iov; 1099e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1100e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 110140b05497SNicholas Bellinger int tx_sent, iov_off; 1102e48354ceSNicholas Bellinger 1103e48354ceSNicholas Bellinger send_hdr: 1104e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1105e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1106e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1107e48354ceSNicholas Bellinger 1108e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1109e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1110e48354ceSNicholas Bellinger 1111e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1112e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1113e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1114e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1115e48354ceSNicholas Bellinger goto send_hdr; 1116e48354ceSNicholas Bellinger } 1117e48354ceSNicholas Bellinger return -1; 1118e48354ceSNicholas Bellinger } 1119e48354ceSNicholas Bellinger 1120e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 112140b05497SNicholas Bellinger /* 112240b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 112340b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 112440b05497SNicholas Bellinger */ 112540b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1126e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 112740b05497SNicholas Bellinger if (cmd->padding) 112840b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 112940b05497SNicholas Bellinger else 113040b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 113140b05497SNicholas Bellinger } else { 113240b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 113340b05497SNicholas Bellinger } 1134e48354ceSNicholas Bellinger /* 1135e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1136e48354ceSNicholas Bellinger */ 1137e48354ceSNicholas Bellinger while (data_len) { 1138e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1139e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1140e48354ceSNicholas Bellinger send_pg: 1141e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1142e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1143e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1144e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1145e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1146e48354ceSNicholas Bellinger " -EAGAIN\n"); 1147e48354ceSNicholas Bellinger goto send_pg; 1148e48354ceSNicholas Bellinger } 1149e48354ceSNicholas Bellinger 1150e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1151e48354ceSNicholas Bellinger tx_sent); 1152e48354ceSNicholas Bellinger return -1; 1153e48354ceSNicholas Bellinger } 1154e48354ceSNicholas Bellinger 1155e48354ceSNicholas Bellinger data_len -= sub_len; 1156e48354ceSNicholas Bellinger offset = 0; 1157e48354ceSNicholas Bellinger sg = sg_next(sg); 1158e48354ceSNicholas Bellinger } 1159e48354ceSNicholas Bellinger 1160e48354ceSNicholas Bellinger send_padding: 1161e48354ceSNicholas Bellinger if (cmd->padding) { 116240b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1163e48354ceSNicholas Bellinger 1164e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1165e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1166e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1167e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1168e48354ceSNicholas Bellinger goto send_padding; 1169e48354ceSNicholas Bellinger } 1170e48354ceSNicholas Bellinger return -1; 1171e48354ceSNicholas Bellinger } 1172e48354ceSNicholas Bellinger } 1173e48354ceSNicholas Bellinger 1174e48354ceSNicholas Bellinger send_datacrc: 1175e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 117640b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1177e48354ceSNicholas Bellinger 1178e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1179e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1180e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1181e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1182e48354ceSNicholas Bellinger goto send_datacrc; 1183e48354ceSNicholas Bellinger } 1184e48354ceSNicholas Bellinger return -1; 1185e48354ceSNicholas Bellinger } 1186e48354ceSNicholas Bellinger } 1187e48354ceSNicholas Bellinger 1188e48354ceSNicholas Bellinger return 0; 1189e48354ceSNicholas Bellinger } 1190e48354ceSNicholas Bellinger 1191e48354ceSNicholas Bellinger /* 1192e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1193e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1194e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1195e48354ceSNicholas Bellinger * 1196e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1197e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1198e48354ceSNicholas Bellinger */ 1199e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1200e48354ceSNicholas Bellinger { 1201e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1202baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1203e48354ceSNicholas Bellinger 1204baa4d64bSNicholas Bellinger login->login_failed = 1; 1205e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1206e48354ceSNicholas Bellinger 120768349756SNicholas Bellinger memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 120868349756SNicholas Bellinger 1209baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1210e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1211e48354ceSNicholas Bellinger hdr->status_class = status_class; 1212e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 121366c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1214e48354ceSNicholas Bellinger 1215baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1216e48354ceSNicholas Bellinger } 1217e48354ceSNicholas Bellinger 1218e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1219e48354ceSNicholas Bellinger { 1220e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1221e48354ceSNicholas Bellinger 1222e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1223e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1224e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1225e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1226e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1227e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1228e48354ceSNicholas Bellinger 1229e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1230e48354ceSNicholas Bellinger } 1231e48354ceSNicholas Bellinger 12327c59daceSMaurizio Lombardi int rx_data( 1233e48354ceSNicholas Bellinger struct iscsi_conn *conn, 12347c59daceSMaurizio Lombardi struct kvec *iov, 12357c59daceSMaurizio Lombardi int iov_count, 12367c59daceSMaurizio Lombardi int data) 1237e48354ceSNicholas Bellinger { 12387c59daceSMaurizio Lombardi int rx_loop = 0, total_rx = 0; 1239e48354ceSNicholas Bellinger struct msghdr msg; 1240e48354ceSNicholas Bellinger 1241e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1242e48354ceSNicholas Bellinger return -1; 1243e48354ceSNicholas Bellinger 1244e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 12457c59daceSMaurizio Lombardi iov_iter_kvec(&msg.msg_iter, READ, iov, iov_count, data); 1246e48354ceSNicholas Bellinger 12472da62906SAl Viro while (msg_data_left(&msg)) { 12482da62906SAl Viro rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1249e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1250e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1251e48354ceSNicholas Bellinger rx_loop, total_rx); 1252e48354ceSNicholas Bellinger return rx_loop; 1253e48354ceSNicholas Bellinger } 1254e48354ceSNicholas Bellinger total_rx += rx_loop; 1255e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1256e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1257e48354ceSNicholas Bellinger } 1258e48354ceSNicholas Bellinger 1259e48354ceSNicholas Bellinger return total_rx; 1260e48354ceSNicholas Bellinger } 1261e48354ceSNicholas Bellinger 1262e48354ceSNicholas Bellinger int tx_data( 1263e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1264e48354ceSNicholas Bellinger struct kvec *iov, 1265e48354ceSNicholas Bellinger int iov_count, 1266e48354ceSNicholas Bellinger int data) 1267e48354ceSNicholas Bellinger { 12684113e47bSAl Viro struct msghdr msg; 12694113e47bSAl Viro int total_tx = 0; 1270e48354ceSNicholas Bellinger 1271e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1272e48354ceSNicholas Bellinger return -1; 1273e48354ceSNicholas Bellinger 12744113e47bSAl Viro if (data <= 0) { 12754113e47bSAl Viro pr_err("Data length is: %d\n", data); 12764113e47bSAl Viro return -1; 12774113e47bSAl Viro } 1278e48354ceSNicholas Bellinger 12794113e47bSAl Viro memset(&msg, 0, sizeof(struct msghdr)); 12804113e47bSAl Viro 1281aa563d7bSDavid Howells iov_iter_kvec(&msg.msg_iter, WRITE, iov, iov_count, data); 12824113e47bSAl Viro 12834113e47bSAl Viro while (msg_data_left(&msg)) { 12844113e47bSAl Viro int tx_loop = sock_sendmsg(conn->sock, &msg); 12854113e47bSAl Viro if (tx_loop <= 0) { 12864113e47bSAl Viro pr_debug("tx_loop: %d total_tx %d\n", 12874113e47bSAl Viro tx_loop, total_tx); 12884113e47bSAl Viro return tx_loop; 12894113e47bSAl Viro } 12904113e47bSAl Viro total_tx += tx_loop; 12914113e47bSAl Viro pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 12924113e47bSAl Viro tx_loop, total_tx, data); 12934113e47bSAl Viro } 12944113e47bSAl Viro 12954113e47bSAl Viro return total_tx; 1296e48354ceSNicholas Bellinger } 1297e48354ceSNicholas Bellinger 1298e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1299e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1300e48354ceSNicholas Bellinger u8 status_class, 1301e48354ceSNicholas Bellinger u8 status_detail) 1302e48354ceSNicholas Bellinger { 1303e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1304e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1305e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1306e48354ceSNicholas Bellinger 1307e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1308e48354ceSNicholas Bellinger if (!tiqn) 1309e48354ceSNicholas Bellinger return; 1310e48354ceSNicholas Bellinger 1311e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1312e48354ceSNicholas Bellinger 1313e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1314e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1315e48354ceSNicholas Bellinger ls->accepts++; 1316e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1317e48354ceSNicholas Bellinger ls->redirects++; 1318e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1319e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1320e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1321e48354ceSNicholas Bellinger ls->authenticate_fails++; 1322e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1323e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1324e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1325e48354ceSNicholas Bellinger ls->authorize_fails++; 1326e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1327e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1328e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1329e48354ceSNicholas Bellinger ls->negotiate_fails++; 1330e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1331e48354ceSNicholas Bellinger } else { 1332e48354ceSNicholas Bellinger ls->other_fails++; 1333e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1334e48354ceSNicholas Bellinger } 1335e48354ceSNicholas Bellinger 1336e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1337e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1338e48354ceSNicholas Bellinger if (conn->param_list) 1339e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1340e48354ceSNicholas Bellinger conn->param_list); 1341fdc84d11SJoern Engel strlcpy(ls->last_intr_fail_name, 1342fdc84d11SJoern Engel (intrname ? intrname->value : "Unknown"), 1343fdc84d11SJoern Engel sizeof(ls->last_intr_fail_name)); 1344e48354ceSNicholas Bellinger 1345baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1346baa4d64bSNicholas Bellinger 1347dc58f760SAndy Grover ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1348e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1349e48354ceSNicholas Bellinger } 1350e48354ceSNicholas Bellinger 1351e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1352e48354ceSNicholas Bellinger } 1353e48354ceSNicholas Bellinger 1354e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1355e48354ceSNicholas Bellinger { 1356e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1357e48354ceSNicholas Bellinger 135817c61ad6SNicholas Bellinger if (!conn) 1359e48354ceSNicholas Bellinger return NULL; 1360e48354ceSNicholas Bellinger 136117c61ad6SNicholas Bellinger tpg = conn->tpg; 1362e48354ceSNicholas Bellinger if (!tpg) 1363e48354ceSNicholas Bellinger return NULL; 1364e48354ceSNicholas Bellinger 1365e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1366e48354ceSNicholas Bellinger return NULL; 1367e48354ceSNicholas Bellinger 1368e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1369e48354ceSNicholas Bellinger } 1370dce6190cSDavid Disseldorp 1371dce6190cSDavid Disseldorp void iscsit_fill_cxn_timeout_err_stats(struct iscsi_session *sess) 1372dce6190cSDavid Disseldorp { 1373dce6190cSDavid Disseldorp struct iscsi_portal_group *tpg = sess->tpg; 1374dce6190cSDavid Disseldorp struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 1375dce6190cSDavid Disseldorp 1376dce6190cSDavid Disseldorp if (!tiqn) 1377dce6190cSDavid Disseldorp return; 1378dce6190cSDavid Disseldorp 1379dce6190cSDavid Disseldorp spin_lock_bh(&tiqn->sess_err_stats.lock); 1380dce6190cSDavid Disseldorp strlcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 1381dce6190cSDavid Disseldorp sess->sess_ops->InitiatorName, 1382dce6190cSDavid Disseldorp sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name)); 1383dce6190cSDavid Disseldorp tiqn->sess_err_stats.last_sess_failure_type = 1384dce6190cSDavid Disseldorp ISCSI_SESS_ERR_CXN_TIMEOUT; 1385dce6190cSDavid Disseldorp tiqn->sess_err_stats.cxn_timeout_errors++; 1386dce6190cSDavid Disseldorp atomic_long_inc(&sess->conn_timeout_errors); 1387dce6190cSDavid Disseldorp spin_unlock_bh(&tiqn->sess_err_stats.lock); 1388dce6190cSDavid Disseldorp } 1389