1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the iSCSI Target specific utility functions. 3e48354ceSNicholas Bellinger * 44c76251eSNicholas Bellinger * (c) Copyright 2007-2013 Datera, Inc. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 9e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 10e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 11e48354ceSNicholas Bellinger * (at your option) any later version. 12e48354ceSNicholas Bellinger * 13e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 14e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 15e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16e48354ceSNicholas Bellinger * GNU General Public License for more details. 17e48354ceSNicholas Bellinger ******************************************************************************/ 18e48354ceSNicholas Bellinger 19e48354ceSNicholas Bellinger #include <linux/list.h> 20988e3a85SNicholas Bellinger #include <linux/percpu_ida.h> 218dcf07beSBart Van Assche #include <net/ipv6.h> /* ipv6_addr_equal() */ 22e48354ceSNicholas Bellinger #include <scsi/scsi_tcq.h> 23e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 24e48354ceSNicholas Bellinger #include <target/target_core_base.h> 25c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 26baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 27e48354ceSNicholas Bellinger 2867f091f2SSagi Grimberg #include <target/iscsi/iscsi_target_core.h> 29e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 30e48354ceSNicholas Bellinger #include "iscsi_target_seq_pdu_list.h" 31e48354ceSNicholas Bellinger #include "iscsi_target_datain_values.h" 32e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 33e48354ceSNicholas Bellinger #include "iscsi_target_erl1.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 37e48354ceSNicholas Bellinger #include "iscsi_target.h" 38e48354ceSNicholas Bellinger 39e48354ceSNicholas Bellinger #define PRINT_BUFF(buff, len) \ 40e48354ceSNicholas Bellinger { \ 41e48354ceSNicholas Bellinger int zzz; \ 42e48354ceSNicholas Bellinger \ 43e48354ceSNicholas Bellinger pr_debug("%d:\n", __LINE__); \ 44e48354ceSNicholas Bellinger for (zzz = 0; zzz < len; zzz++) { \ 45e48354ceSNicholas Bellinger if (zzz % 16 == 0) { \ 46e48354ceSNicholas Bellinger if (zzz) \ 47e48354ceSNicholas Bellinger pr_debug("\n"); \ 48e48354ceSNicholas Bellinger pr_debug("%4i: ", zzz); \ 49e48354ceSNicholas Bellinger } \ 50e48354ceSNicholas Bellinger pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 51e48354ceSNicholas Bellinger } \ 52e48354ceSNicholas Bellinger if ((len + 1) % 16) \ 53e48354ceSNicholas Bellinger pr_debug("\n"); \ 54e48354ceSNicholas Bellinger } 55e48354ceSNicholas Bellinger 56e48354ceSNicholas Bellinger extern struct list_head g_tiqn_list; 57e48354ceSNicholas Bellinger extern spinlock_t tiqn_lock; 58e48354ceSNicholas Bellinger 59e48354ceSNicholas Bellinger /* 60e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 61e48354ceSNicholas Bellinger */ 62e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 63e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 64e48354ceSNicholas Bellinger u32 offset, 65e48354ceSNicholas Bellinger u32 xfer_len, 66e48354ceSNicholas Bellinger int recovery, 67e48354ceSNicholas Bellinger u32 r2t_sn) 68e48354ceSNicholas Bellinger { 69e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 70e48354ceSNicholas Bellinger 71e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 72e48354ceSNicholas Bellinger if (!r2t) { 73e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 74e48354ceSNicholas Bellinger return -1; 75e48354ceSNicholas Bellinger } 76e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 77e48354ceSNicholas Bellinger 78e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 79e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 80e48354ceSNicholas Bellinger r2t->offset = offset; 81e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 82e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 83e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 84e48354ceSNicholas Bellinger 85e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 86e48354ceSNicholas Bellinger 87e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 88e48354ceSNicholas Bellinger return 0; 89e48354ceSNicholas Bellinger } 90e48354ceSNicholas Bellinger 91e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 92e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 93e48354ceSNicholas Bellinger u32 offset, 94e48354ceSNicholas Bellinger u32 length) 95e48354ceSNicholas Bellinger { 96e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 97e48354ceSNicholas Bellinger 98e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 99e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 100e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 101e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 102e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 103e48354ceSNicholas Bellinger return r2t; 104e48354ceSNicholas Bellinger } 105e48354ceSNicholas Bellinger } 106e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 107e48354ceSNicholas Bellinger 108e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 109e48354ceSNicholas Bellinger " %u\n", offset, length); 110e48354ceSNicholas Bellinger return NULL; 111e48354ceSNicholas Bellinger } 112e48354ceSNicholas Bellinger 113e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 114e48354ceSNicholas Bellinger { 115e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 116e48354ceSNicholas Bellinger 117e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 118e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 119e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 120e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 121e48354ceSNicholas Bellinger return r2t; 122e48354ceSNicholas Bellinger } 123e48354ceSNicholas Bellinger } 124e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 125e48354ceSNicholas Bellinger 126e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 127e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 128e48354ceSNicholas Bellinger return NULL; 129e48354ceSNicholas Bellinger } 130e48354ceSNicholas Bellinger 131e48354ceSNicholas Bellinger /* 132e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 133e48354ceSNicholas Bellinger */ 134e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 135e48354ceSNicholas Bellinger { 136e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 137e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 138e48354ceSNicholas Bellinger } 139e48354ceSNicholas Bellinger 140e48354ceSNicholas Bellinger void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 141e48354ceSNicholas Bellinger { 142e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 143e48354ceSNicholas Bellinger 144e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 145e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 146e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 147e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 148e48354ceSNicholas Bellinger } 149e48354ceSNicholas Bellinger 150e48354ceSNicholas Bellinger /* 151e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 152e48354ceSNicholas Bellinger * iSCSI NopINs. 153e48354ceSNicholas Bellinger */ 154676687c6SNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) 155e48354ceSNicholas Bellinger { 156e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 157988e3a85SNicholas Bellinger struct se_session *se_sess = conn->sess->se_sess; 158676687c6SNicholas Bellinger int size, tag; 159e48354ceSNicholas Bellinger 1606f6b5d1eSKent Overstreet tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state); 1616f6b5d1eSKent Overstreet if (tag < 0) 1626f6b5d1eSKent Overstreet return NULL; 1636f6b5d1eSKent Overstreet 164988e3a85SNicholas Bellinger size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; 165988e3a85SNicholas Bellinger cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); 166988e3a85SNicholas Bellinger memset(cmd, 0, size); 167988e3a85SNicholas Bellinger 168988e3a85SNicholas Bellinger cmd->se_cmd.map_tag = tag; 169e48354ceSNicholas Bellinger cmd->conn = conn; 1704412a671SBart Van Assche cmd->data_direction = DMA_NONE; 1712fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 172e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 173e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 174e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 175e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 176e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 177e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 178e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 179e48354ceSNicholas Bellinger 180e48354ceSNicholas Bellinger return cmd; 181e48354ceSNicholas Bellinger } 182cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 183e48354ceSNicholas Bellinger 184e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 185e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 186e48354ceSNicholas Bellinger u32 seq_send_order) 187e48354ceSNicholas Bellinger { 188e48354ceSNicholas Bellinger u32 i; 189e48354ceSNicholas Bellinger 190e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 191e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 192e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 193e48354ceSNicholas Bellinger 194e48354ceSNicholas Bellinger return NULL; 195e48354ceSNicholas Bellinger } 196e48354ceSNicholas Bellinger 197e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 198e48354ceSNicholas Bellinger { 199e48354ceSNicholas Bellinger u32 i; 200e48354ceSNicholas Bellinger 201e48354ceSNicholas Bellinger if (!cmd->seq_list) { 202e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 203e48354ceSNicholas Bellinger return NULL; 204e48354ceSNicholas Bellinger } 205e48354ceSNicholas Bellinger 206e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 207e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 208e48354ceSNicholas Bellinger continue; 209e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 210e48354ceSNicholas Bellinger cmd->seq_send_order++; 211e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 212e48354ceSNicholas Bellinger } 213e48354ceSNicholas Bellinger } 214e48354ceSNicholas Bellinger 215e48354ceSNicholas Bellinger return NULL; 216e48354ceSNicholas Bellinger } 217e48354ceSNicholas Bellinger 218e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 219e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 220e48354ceSNicholas Bellinger u32 r2t_sn) 221e48354ceSNicholas Bellinger { 222e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 223e48354ceSNicholas Bellinger 224e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 225e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 226e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 227e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 228e48354ceSNicholas Bellinger return r2t; 229e48354ceSNicholas Bellinger } 230e48354ceSNicholas Bellinger } 231e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 232e48354ceSNicholas Bellinger 233e48354ceSNicholas Bellinger return NULL; 234e48354ceSNicholas Bellinger } 235e48354ceSNicholas Bellinger 236e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 237e48354ceSNicholas Bellinger { 238109e2381SRoland Dreier u32 max_cmdsn; 239e48354ceSNicholas Bellinger int ret; 240e48354ceSNicholas Bellinger 241e48354ceSNicholas Bellinger /* 242e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 243e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 244e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 245e48354ceSNicholas Bellinger * CRC failures. 246e48354ceSNicholas Bellinger */ 247109e2381SRoland Dreier max_cmdsn = atomic_read(&sess->max_cmd_sn); 248109e2381SRoland Dreier if (iscsi_sna_gt(cmdsn, max_cmdsn)) { 249e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 250109e2381SRoland Dreier " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); 251ea7e32beSNicholas Bellinger ret = CMDSN_MAXCMDSN_OVERRUN; 252e48354ceSNicholas Bellinger 253e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 254e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 255e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 256e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 257e48354ceSNicholas Bellinger sess->exp_cmd_sn); 258e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 259e48354ceSNicholas Bellinger 260e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 261e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 262e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 263e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 264e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 265e48354ceSNicholas Bellinger 266e48354ceSNicholas Bellinger } else { 267e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 268e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 269e48354ceSNicholas Bellinger sess->exp_cmd_sn); 270e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 271e48354ceSNicholas Bellinger } 272e48354ceSNicholas Bellinger 273e48354ceSNicholas Bellinger return ret; 274e48354ceSNicholas Bellinger } 275e48354ceSNicholas Bellinger 276e48354ceSNicholas Bellinger /* 277e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 278e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 279e48354ceSNicholas Bellinger */ 280561bf158SNicholas Bellinger int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 281561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 282e48354ceSNicholas Bellinger { 283561bf158SNicholas Bellinger int ret, cmdsn_ret; 284561bf158SNicholas Bellinger bool reject = false; 285561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 286e48354ceSNicholas Bellinger 287e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 288e48354ceSNicholas Bellinger 28950e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 290e48354ceSNicholas Bellinger switch (cmdsn_ret) { 291e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 292e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 293e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 294e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 295561bf158SNicholas Bellinger else if (ret < 0) { 296561bf158SNicholas Bellinger reject = true; 297561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 298561bf158SNicholas Bellinger } 299e48354ceSNicholas Bellinger break; 300e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 30150e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 302561bf158SNicholas Bellinger if (ret < 0) { 303561bf158SNicholas Bellinger reject = true; 304561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 305561bf158SNicholas Bellinger break; 306561bf158SNicholas Bellinger } 307561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 308e48354ceSNicholas Bellinger break; 309e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 310ea7e32beSNicholas Bellinger case CMDSN_MAXCMDSN_OVERRUN: 311ea7e32beSNicholas Bellinger default: 312e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 313e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 314ea7e32beSNicholas Bellinger /* 315ea7e32beSNicholas Bellinger * Existing callers for iscsit_sequence_cmd() will silently 316ea7e32beSNicholas Bellinger * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 317ea7e32beSNicholas Bellinger * return for CMDSN_MAXCMDSN_OVERRUN as well.. 318ea7e32beSNicholas Bellinger */ 319ea7e32beSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 320e48354ceSNicholas Bellinger break; 321e48354ceSNicholas Bellinger } 322e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 323e48354ceSNicholas Bellinger 324561bf158SNicholas Bellinger if (reject) 325561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 326561bf158SNicholas Bellinger 327e48354ceSNicholas Bellinger return ret; 328e48354ceSNicholas Bellinger } 3293e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 330e48354ceSNicholas Bellinger 331e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 332e48354ceSNicholas Bellinger { 333e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 334e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 335e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 336e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 337e48354ceSNicholas Bellinger 338e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 339e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 340e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 341e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 342e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 343e48354ceSNicholas Bellinger return -1; 344e48354ceSNicholas Bellinger } 345e48354ceSNicholas Bellinger 346e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 347e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 348e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 349e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 350e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 351e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 352e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 353e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 354e48354ceSNicholas Bellinger return -1; 355e48354ceSNicholas Bellinger } 356e48354ceSNicholas Bellinger 357e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 358e48354ceSNicholas Bellinger return 0; 359e48354ceSNicholas Bellinger 360ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 361e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 362e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 363e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 364e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 365e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 366e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 367ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 368e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 369e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 370e48354ceSNicholas Bellinger return -1; 371e48354ceSNicholas Bellinger } 372e48354ceSNicholas Bellinger return 0; 373e48354ceSNicholas Bellinger } 374e48354ceSNicholas Bellinger 375e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 376e48354ceSNicholas Bellinger struct iscsi_conn *conn, 37766c7db68SChristoph Hellwig itt_t init_task_tag) 378e48354ceSNicholas Bellinger { 379e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 380e48354ceSNicholas Bellinger 381e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3822fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 383e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 384e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 385e48354ceSNicholas Bellinger return cmd; 386e48354ceSNicholas Bellinger } 387e48354ceSNicholas Bellinger } 388e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 389e48354ceSNicholas Bellinger 390e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 391e48354ceSNicholas Bellinger init_task_tag, conn->cid); 392e48354ceSNicholas Bellinger return NULL; 393e48354ceSNicholas Bellinger } 394e4f4e801SSagi Grimberg EXPORT_SYMBOL(iscsit_find_cmd_from_itt); 395e48354ceSNicholas Bellinger 396e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 397e48354ceSNicholas Bellinger struct iscsi_conn *conn, 39866c7db68SChristoph Hellwig itt_t init_task_tag, 399e48354ceSNicholas Bellinger u32 length) 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) { 4053687db88SNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 4063687db88SNicholas Bellinger continue; 407e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 408e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 409e48354ceSNicholas Bellinger return cmd; 410e48354ceSNicholas Bellinger } 411e48354ceSNicholas Bellinger } 412e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 413e48354ceSNicholas Bellinger 414e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 415e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 416e48354ceSNicholas Bellinger if (length) 417e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 418e48354ceSNicholas Bellinger 419e48354ceSNicholas Bellinger return NULL; 420e48354ceSNicholas Bellinger } 4219a584bf9SVarun Prakash EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); 422e48354ceSNicholas Bellinger 423e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 424e48354ceSNicholas Bellinger struct iscsi_conn *conn, 425e48354ceSNicholas Bellinger u32 targ_xfer_tag) 426e48354ceSNicholas Bellinger { 427e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 428e48354ceSNicholas Bellinger 429e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4302fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 431e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 432e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 433e48354ceSNicholas Bellinger return cmd; 434e48354ceSNicholas Bellinger } 435e48354ceSNicholas Bellinger } 436e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 437e48354ceSNicholas Bellinger 438e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 439e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 440e48354ceSNicholas Bellinger return NULL; 441e48354ceSNicholas Bellinger } 442e48354ceSNicholas Bellinger 443e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 444e48354ceSNicholas Bellinger struct iscsi_session *sess, 445e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 446e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 44766c7db68SChristoph Hellwig itt_t init_task_tag) 448e48354ceSNicholas Bellinger { 449e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 450e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 451e48354ceSNicholas Bellinger /* 452e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 453e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 454e48354ceSNicholas Bellinger */ 455e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 456e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 457e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4582fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 459e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 460e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 461e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 462e48354ceSNicholas Bellinger 463e48354ceSNicholas Bellinger *cr_ptr = cr; 464e48354ceSNicholas Bellinger *cmd_ptr = cmd; 465e48354ceSNicholas Bellinger return -2; 466e48354ceSNicholas Bellinger } 467e48354ceSNicholas Bellinger } 468e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 469e48354ceSNicholas Bellinger } 470e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 471e48354ceSNicholas Bellinger /* 472e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 473e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 474e48354ceSNicholas Bellinger */ 475e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 476e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 477e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4782fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 479e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 480e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 481e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 482e48354ceSNicholas Bellinger 483e48354ceSNicholas Bellinger *cr_ptr = cr; 484e48354ceSNicholas Bellinger *cmd_ptr = cmd; 485e48354ceSNicholas Bellinger return 0; 486e48354ceSNicholas Bellinger } 487e48354ceSNicholas Bellinger } 488e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 489e48354ceSNicholas Bellinger } 490e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 491e48354ceSNicholas Bellinger 492e48354ceSNicholas Bellinger return -1; 493e48354ceSNicholas Bellinger } 494e48354ceSNicholas Bellinger 495e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 496e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 497e48354ceSNicholas Bellinger struct iscsi_conn *conn, 498e48354ceSNicholas Bellinger u8 state) 499e48354ceSNicholas Bellinger { 500e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 501e48354ceSNicholas Bellinger 502e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 503e48354ceSNicholas Bellinger if (!qr) { 504e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 505e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 506e48354ceSNicholas Bellinger return; 507e48354ceSNicholas Bellinger } 508e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 509e48354ceSNicholas Bellinger qr->cmd = cmd; 510e48354ceSNicholas Bellinger qr->state = state; 511e48354ceSNicholas Bellinger 512e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 513e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 514e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 515e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 516e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 517e48354ceSNicholas Bellinger 518d5627acbSRoland Dreier wake_up(&conn->queues_wq); 519e48354ceSNicholas Bellinger } 520d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); 521e48354ceSNicholas Bellinger 522e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 523e48354ceSNicholas Bellinger { 524e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 525e48354ceSNicholas Bellinger 526e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 527e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 528e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 529e48354ceSNicholas Bellinger return NULL; 530e48354ceSNicholas Bellinger } 5311f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5321f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 533e48354ceSNicholas Bellinger 534e48354ceSNicholas Bellinger list_del(&qr->qr_list); 535e48354ceSNicholas Bellinger if (qr->cmd) 536e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 537e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 538e48354ceSNicholas Bellinger 539e48354ceSNicholas Bellinger return qr; 540e48354ceSNicholas Bellinger } 541e48354ceSNicholas Bellinger 542e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 543e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 544e48354ceSNicholas Bellinger struct iscsi_conn *conn) 545e48354ceSNicholas Bellinger { 546e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 547e48354ceSNicholas Bellinger 548e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 549e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 550e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 551e48354ceSNicholas Bellinger return; 552e48354ceSNicholas Bellinger } 553e48354ceSNicholas Bellinger 554e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 555e48354ceSNicholas Bellinger if (qr->cmd != cmd) 556e48354ceSNicholas Bellinger continue; 557e48354ceSNicholas Bellinger 558e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 559e48354ceSNicholas Bellinger list_del(&qr->qr_list); 560e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 561e48354ceSNicholas Bellinger } 562e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 563e48354ceSNicholas Bellinger 564e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 565e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 566e48354ceSNicholas Bellinger cmd->init_task_tag, 567e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 568e48354ceSNicholas Bellinger } 569e48354ceSNicholas Bellinger } 570e48354ceSNicholas Bellinger 571a4467018SNicholas Bellinger int iscsit_add_cmd_to_response_queue( 572e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 573e48354ceSNicholas Bellinger struct iscsi_conn *conn, 574e48354ceSNicholas Bellinger u8 state) 575e48354ceSNicholas Bellinger { 576e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 577e48354ceSNicholas Bellinger 578e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 579e48354ceSNicholas Bellinger if (!qr) { 580e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 581e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 582a4467018SNicholas Bellinger return -ENOMEM; 583e48354ceSNicholas Bellinger } 584e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 585e48354ceSNicholas Bellinger qr->cmd = cmd; 586e48354ceSNicholas Bellinger qr->state = state; 587e48354ceSNicholas Bellinger 588e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 589e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 590e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 591e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 592e48354ceSNicholas Bellinger 593d5627acbSRoland Dreier wake_up(&conn->queues_wq); 594a4467018SNicholas Bellinger return 0; 595e48354ceSNicholas Bellinger } 596e48354ceSNicholas Bellinger 597e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 598e48354ceSNicholas Bellinger { 599e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 600e48354ceSNicholas Bellinger 601e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 602e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 603e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 604e48354ceSNicholas Bellinger return NULL; 605e48354ceSNicholas Bellinger } 606e48354ceSNicholas Bellinger 6071f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6081f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 609e48354ceSNicholas Bellinger 610e48354ceSNicholas Bellinger list_del(&qr->qr_list); 611e48354ceSNicholas Bellinger if (qr->cmd) 612e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 613e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 614e48354ceSNicholas Bellinger 615e48354ceSNicholas Bellinger return qr; 616e48354ceSNicholas Bellinger } 617e48354ceSNicholas Bellinger 618e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 619e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 620e48354ceSNicholas Bellinger struct iscsi_conn *conn) 621e48354ceSNicholas Bellinger { 622e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 623e48354ceSNicholas Bellinger 624e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 625e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 626e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 627e48354ceSNicholas Bellinger return; 628e48354ceSNicholas Bellinger } 629e48354ceSNicholas Bellinger 630e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 631e48354ceSNicholas Bellinger qr_list) { 632e48354ceSNicholas Bellinger if (qr->cmd != cmd) 633e48354ceSNicholas Bellinger continue; 634e48354ceSNicholas Bellinger 635e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 636e48354ceSNicholas Bellinger list_del(&qr->qr_list); 637e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 638e48354ceSNicholas Bellinger } 639e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 640e48354ceSNicholas Bellinger 641e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 642e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 643e48354ceSNicholas Bellinger cmd->init_task_tag, 644e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 645e48354ceSNicholas Bellinger } 646e48354ceSNicholas Bellinger } 647e48354ceSNicholas Bellinger 648d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 649d5627acbSRoland Dreier { 650d5627acbSRoland Dreier bool empty; 651d5627acbSRoland Dreier 652d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 653d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 654d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 655d5627acbSRoland Dreier 656d5627acbSRoland Dreier if (!empty) 657d5627acbSRoland Dreier return empty; 658d5627acbSRoland Dreier 659d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 660d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 661d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 662d5627acbSRoland Dreier 663d5627acbSRoland Dreier return empty; 664d5627acbSRoland Dreier } 665d5627acbSRoland Dreier 666e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 667e48354ceSNicholas Bellinger { 668e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 669e48354ceSNicholas Bellinger 670e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 671e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 672e48354ceSNicholas Bellinger list_del(&qr->qr_list); 673e48354ceSNicholas Bellinger if (qr->cmd) 674e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 675e48354ceSNicholas Bellinger 676e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 677e48354ceSNicholas Bellinger } 678e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 679e48354ceSNicholas Bellinger 680e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 681e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 682e48354ceSNicholas Bellinger qr_list) { 683e48354ceSNicholas Bellinger list_del(&qr->qr_list); 684e48354ceSNicholas Bellinger if (qr->cmd) 685e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 686e48354ceSNicholas Bellinger 687e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 688e48354ceSNicholas Bellinger } 689e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 690e48354ceSNicholas Bellinger } 691e48354ceSNicholas Bellinger 692e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 693e48354ceSNicholas Bellinger { 694988e3a85SNicholas Bellinger struct iscsi_session *sess; 695988e3a85SNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 696988e3a85SNicholas Bellinger 697988e3a85SNicholas Bellinger if (cmd->conn) 698988e3a85SNicholas Bellinger sess = cmd->conn->sess; 699988e3a85SNicholas Bellinger else 700988e3a85SNicholas Bellinger sess = cmd->sess; 701988e3a85SNicholas Bellinger 702988e3a85SNicholas Bellinger BUG_ON(!sess || !sess->se_sess); 703988e3a85SNicholas Bellinger 704e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 705e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 706e48354ceSNicholas Bellinger kfree(cmd->seq_list); 707e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 708e48354ceSNicholas Bellinger kfree(cmd->iov_data); 7099864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 710e48354ceSNicholas Bellinger 711988e3a85SNicholas Bellinger percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); 712e48354ceSNicholas Bellinger } 713d703ce2fSNicholas Bellinger EXPORT_SYMBOL(iscsit_release_cmd); 714e48354ceSNicholas Bellinger 7154412a671SBart Van Assche void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool check_queues) 716d270190aSNicholas Bellinger { 717aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 718aafc9d15SNicholas Bellinger 719aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 720aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 721aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 722aafc9d15SNicholas Bellinger } 723aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 724aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 725aafc9d15SNicholas Bellinger 726aafc9d15SNicholas Bellinger if (conn && check_queues) { 727aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 728aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 729aafc9d15SNicholas Bellinger } 7307ec811a8SVarun Prakash 7317ec811a8SVarun Prakash if (conn && conn->conn_transport->iscsit_release_cmd) 7327ec811a8SVarun Prakash conn->conn_transport->iscsit_release_cmd(conn, cmd); 733aafc9d15SNicholas Bellinger } 734aafc9d15SNicholas Bellinger 735aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 736aafc9d15SNicholas Bellinger { 737aafc9d15SNicholas Bellinger struct se_cmd *se_cmd = NULL; 738aafc9d15SNicholas Bellinger int rc; 7394412a671SBart Van Assche 740d270190aSNicholas Bellinger /* 74120879696SMasanari Iida * Determine if a struct se_cmd is associated with 742d270190aSNicholas Bellinger * this struct iscsi_cmd. 743d270190aSNicholas Bellinger */ 744d270190aSNicholas Bellinger switch (cmd->iscsi_opcode) { 745d270190aSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 746cdb72665SNicholas Bellinger /* 747cdb72665SNicholas Bellinger * Fallthrough 748cdb72665SNicholas Bellinger */ 749d270190aSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 750efb2ea77SNicholas Bellinger se_cmd = &cmd->se_cmd; 7514412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 752efb2ea77SNicholas Bellinger rc = transport_generic_free_cmd(se_cmd, shutdown); 753efb2ea77SNicholas Bellinger if (!rc && shutdown && se_cmd->se_sess) { 7544412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 755afc16604SBart Van Assche target_put_sess_cmd(se_cmd); 756aafc9d15SNicholas Bellinger } 757d270190aSNicholas Bellinger break; 758c1ce4bd5SNicholas Bellinger case ISCSI_OP_REJECT: 759c1ce4bd5SNicholas Bellinger /* 760c1ce4bd5SNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 761c1ce4bd5SNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 762c1ce4bd5SNicholas Bellinger * associated cmd->se_cmd needs to be released. 763c1ce4bd5SNicholas Bellinger */ 764c1ce4bd5SNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 765aafc9d15SNicholas Bellinger se_cmd = &cmd->se_cmd; 7664412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 767aafc9d15SNicholas Bellinger 768e255a285SNicholas Bellinger rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); 769aafc9d15SNicholas Bellinger if (!rc && shutdown && se_cmd->se_sess) { 7704412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 771afc16604SBart Van Assche target_put_sess_cmd(se_cmd); 772aafc9d15SNicholas Bellinger } 773c1ce4bd5SNicholas Bellinger break; 774c1ce4bd5SNicholas Bellinger } 775c1ce4bd5SNicholas Bellinger /* Fall-through */ 776d270190aSNicholas Bellinger default: 7774412a671SBart Van Assche __iscsit_free_cmd(cmd, shutdown); 778d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 779d270190aSNicholas Bellinger break; 780d270190aSNicholas Bellinger } 781d270190aSNicholas Bellinger } 782d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsit_free_cmd); 783d270190aSNicholas Bellinger 784e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 785e48354ceSNicholas Bellinger { 786e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 787e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 788e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 789e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 790e48354ceSNicholas Bellinger if (in_interrupt()) 791e48354ceSNicholas Bellinger return 2; 792e48354ceSNicholas Bellinger 793e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 794e48354ceSNicholas Bellinger return 1; 795e48354ceSNicholas Bellinger } 796e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 797e48354ceSNicholas Bellinger 798e48354ceSNicholas Bellinger return 0; 799e48354ceSNicholas Bellinger } 800e48354ceSNicholas Bellinger 801e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 802e48354ceSNicholas Bellinger { 803e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 804e48354ceSNicholas Bellinger sess->session_usage_count--; 805e48354ceSNicholas Bellinger 806e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 807e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 808e48354ceSNicholas Bellinger 809e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 810e48354ceSNicholas Bellinger } 811e48354ceSNicholas Bellinger 812e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 813e48354ceSNicholas Bellinger { 814e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 815e48354ceSNicholas Bellinger sess->session_usage_count++; 816e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 817e48354ceSNicholas Bellinger } 818e48354ceSNicholas Bellinger 819e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 820e48354ceSNicholas Bellinger { 821e48354ceSNicholas Bellinger struct iscsi_conn *conn; 822e48354ceSNicholas Bellinger 823e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 824e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 825e48354ceSNicholas Bellinger if ((conn->cid == cid) && 826e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 827e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 828e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 829e48354ceSNicholas Bellinger return conn; 830e48354ceSNicholas Bellinger } 831e48354ceSNicholas Bellinger } 832e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 833e48354ceSNicholas Bellinger 834e48354ceSNicholas Bellinger return NULL; 835e48354ceSNicholas Bellinger } 836e48354ceSNicholas Bellinger 837e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 838e48354ceSNicholas Bellinger { 839e48354ceSNicholas Bellinger struct iscsi_conn *conn; 840e48354ceSNicholas Bellinger 841e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 842e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 843e48354ceSNicholas Bellinger if (conn->cid == cid) { 844e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 845e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 846e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 847e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 848e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 849e48354ceSNicholas Bellinger return conn; 850e48354ceSNicholas Bellinger } 851e48354ceSNicholas Bellinger } 852e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 853e48354ceSNicholas Bellinger 854e48354ceSNicholas Bellinger return NULL; 855e48354ceSNicholas Bellinger } 856e48354ceSNicholas Bellinger 857e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 858e48354ceSNicholas Bellinger { 859e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 860e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 861e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 862e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 863e48354ceSNicholas Bellinger 864e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 865e48354ceSNicholas Bellinger return; 866e48354ceSNicholas Bellinger } 867e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 868e48354ceSNicholas Bellinger } 869e48354ceSNicholas Bellinger 870e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 871e48354ceSNicholas Bellinger { 872e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 873e48354ceSNicholas Bellinger conn->conn_usage_count--; 874e48354ceSNicholas Bellinger 875e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 876e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 877e48354ceSNicholas Bellinger 878e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 879e48354ceSNicholas Bellinger } 880e48354ceSNicholas Bellinger 881e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 882e48354ceSNicholas Bellinger { 883e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 884e48354ceSNicholas Bellinger conn->conn_usage_count++; 885e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 886e48354ceSNicholas Bellinger } 887e48354ceSNicholas Bellinger 888e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 889e48354ceSNicholas Bellinger { 890e48354ceSNicholas Bellinger u8 state; 891e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 892e48354ceSNicholas Bellinger 893676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 894e48354ceSNicholas Bellinger if (!cmd) 895e48354ceSNicholas Bellinger return -1; 896e48354ceSNicholas Bellinger 897e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 898e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 899e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 90066c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 901c1e34b64SSagi Grimberg cmd->targ_xfer_tag = (want_response) ? 902c1e34b64SSagi Grimberg session_get_next_ttt(conn->sess) : 0xFFFFFFFF; 903e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 9042fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 905e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 906e48354ceSNicholas Bellinger 907e48354ceSNicholas Bellinger if (want_response) 908e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 909e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 910e48354ceSNicholas Bellinger 911e48354ceSNicholas Bellinger return 0; 912e48354ceSNicholas Bellinger } 913e48354ceSNicholas Bellinger 914e48354ceSNicholas Bellinger static void iscsit_handle_nopin_response_timeout(unsigned long data) 915e48354ceSNicholas Bellinger { 916e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 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 927e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 928e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 929e48354ceSNicholas Bellinger conn->sess->sid); 930e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 931e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 932e48354ceSNicholas Bellinger 933e48354ceSNicholas Bellinger { 934e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 935e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 936e48354ceSNicholas Bellinger 937e48354ceSNicholas Bellinger if (tiqn) { 938e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 939e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9408359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 941e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 942e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 943e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 94404f3b31bSNicholas Bellinger atomic_long_inc(&conn->sess->conn_timeout_errors); 945e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 946e48354ceSNicholas Bellinger } 947e48354ceSNicholas Bellinger } 948e48354ceSNicholas Bellinger 949e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 950e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 951e48354ceSNicholas Bellinger } 952e48354ceSNicholas Bellinger 953e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 954e48354ceSNicholas Bellinger { 955e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 956e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 957e48354ceSNicholas Bellinger 958e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 959e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 960e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 961e48354ceSNicholas Bellinger return; 962e48354ceSNicholas Bellinger } 963e48354ceSNicholas Bellinger 964e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 965e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 966e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 967e48354ceSNicholas Bellinger } 968e48354ceSNicholas Bellinger 969e48354ceSNicholas Bellinger /* 970e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 971e48354ceSNicholas Bellinger */ 972e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 973e48354ceSNicholas Bellinger { 974e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 975e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 976e48354ceSNicholas Bellinger 977e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 978e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 979e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 980e48354ceSNicholas Bellinger return; 981e48354ceSNicholas Bellinger } 982e48354ceSNicholas Bellinger 983e48354ceSNicholas Bellinger init_timer(&conn->nopin_response_timer); 984e48354ceSNicholas Bellinger conn->nopin_response_timer.expires = 985e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ); 986e48354ceSNicholas Bellinger conn->nopin_response_timer.data = (unsigned long)conn; 987e48354ceSNicholas Bellinger conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 988e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 989e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 990e48354ceSNicholas Bellinger add_timer(&conn->nopin_response_timer); 991e48354ceSNicholas Bellinger 992e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 993e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 994e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 995e48354ceSNicholas Bellinger } 996e48354ceSNicholas Bellinger 997e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 998e48354ceSNicholas Bellinger { 999e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1000e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1001e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1002e48354ceSNicholas Bellinger return; 1003e48354ceSNicholas Bellinger } 1004e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1005e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1006e48354ceSNicholas Bellinger 1007e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 1008e48354ceSNicholas Bellinger 1009e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1010e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1011e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1012e48354ceSNicholas Bellinger } 1013e48354ceSNicholas Bellinger 1014e48354ceSNicholas Bellinger static void iscsit_handle_nopin_timeout(unsigned long data) 1015e48354ceSNicholas Bellinger { 1016e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 1017e48354ceSNicholas Bellinger 1018e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1019e48354ceSNicholas Bellinger 1020e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1021e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1022e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1023e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1024e48354ceSNicholas Bellinger return; 1025e48354ceSNicholas Bellinger } 1026e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1027e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1028e48354ceSNicholas Bellinger 1029e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1030e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1031e48354ceSNicholas Bellinger } 1032e48354ceSNicholas Bellinger 1033e48354ceSNicholas Bellinger /* 1034e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1035e48354ceSNicholas Bellinger */ 1036e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1037e48354ceSNicholas Bellinger { 1038e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1039e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1040e48354ceSNicholas Bellinger /* 1041e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1042e48354ceSNicholas Bellinger */ 1043e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1044e48354ceSNicholas Bellinger return; 1045e48354ceSNicholas Bellinger 1046e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1047e48354ceSNicholas Bellinger return; 1048e48354ceSNicholas Bellinger 1049e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1050e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1051e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1052e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1053e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1054e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1055e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1056e48354ceSNicholas Bellinger 1057e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1058e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1059e48354ceSNicholas Bellinger } 1060e48354ceSNicholas Bellinger 1061e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1062e48354ceSNicholas Bellinger { 1063e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1064e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1065e48354ceSNicholas Bellinger /* 1066e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1067e48354ceSNicholas Bellinger */ 1068e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1069e48354ceSNicholas Bellinger return; 1070e48354ceSNicholas Bellinger 1071e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1072e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1073e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1074e48354ceSNicholas Bellinger return; 1075e48354ceSNicholas Bellinger } 1076e48354ceSNicholas Bellinger 1077e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1078e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1079e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1080e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1081e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1082e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1083e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1084e48354ceSNicholas Bellinger 1085e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1086e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1087e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1088e48354ceSNicholas Bellinger } 1089e48354ceSNicholas Bellinger 1090e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1091e48354ceSNicholas Bellinger { 1092e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1093e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1094e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1095e48354ceSNicholas Bellinger return; 1096e48354ceSNicholas Bellinger } 1097e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1098e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1099e48354ceSNicholas Bellinger 1100e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1101e48354ceSNicholas Bellinger 1102e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1103e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1104e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1105e48354ceSNicholas Bellinger } 1106e48354ceSNicholas Bellinger 1107e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1108e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1109e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1110e48354ceSNicholas Bellinger int use_misc) 1111e48354ceSNicholas Bellinger { 1112e48354ceSNicholas Bellinger int tx_sent, tx_size; 1113e48354ceSNicholas Bellinger u32 iov_count; 1114e48354ceSNicholas Bellinger struct kvec *iov; 1115e48354ceSNicholas Bellinger 1116e48354ceSNicholas Bellinger send_data: 1117e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1118e48354ceSNicholas Bellinger 1119e48354ceSNicholas Bellinger if (!use_misc) { 1120e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1121e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1122e48354ceSNicholas Bellinger } else { 1123e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1124e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1125e48354ceSNicholas Bellinger } 1126e48354ceSNicholas Bellinger 1127e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1128e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1129e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1130e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1131e48354ceSNicholas Bellinger goto send_data; 1132e48354ceSNicholas Bellinger } else 1133e48354ceSNicholas Bellinger return -1; 1134e48354ceSNicholas Bellinger } 1135e48354ceSNicholas Bellinger cmd->tx_size = 0; 1136e48354ceSNicholas Bellinger 1137e48354ceSNicholas Bellinger return 0; 1138e48354ceSNicholas Bellinger } 1139e48354ceSNicholas Bellinger 1140e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1141e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1142e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1143e48354ceSNicholas Bellinger { 1144e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1145e48354ceSNicholas Bellinger struct kvec iov; 1146e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1147e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 114840b05497SNicholas Bellinger int tx_sent, iov_off; 1149e48354ceSNicholas Bellinger 1150e48354ceSNicholas Bellinger send_hdr: 1151e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1152e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1153e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1154e48354ceSNicholas Bellinger 1155e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1156e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1157e48354ceSNicholas Bellinger 1158e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1159e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1160e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1161e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1162e48354ceSNicholas Bellinger goto send_hdr; 1163e48354ceSNicholas Bellinger } 1164e48354ceSNicholas Bellinger return -1; 1165e48354ceSNicholas Bellinger } 1166e48354ceSNicholas Bellinger 1167e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 116840b05497SNicholas Bellinger /* 116940b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 117040b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 117140b05497SNicholas Bellinger */ 117240b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1173e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 117440b05497SNicholas Bellinger if (cmd->padding) 117540b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 117640b05497SNicholas Bellinger else 117740b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 117840b05497SNicholas Bellinger } else { 117940b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 118040b05497SNicholas Bellinger } 1181e48354ceSNicholas Bellinger /* 1182e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1183e48354ceSNicholas Bellinger */ 1184e48354ceSNicholas Bellinger while (data_len) { 1185e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1186e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1187e48354ceSNicholas Bellinger send_pg: 1188e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1189e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1190e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1191e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1192e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1193e48354ceSNicholas Bellinger " -EAGAIN\n"); 1194e48354ceSNicholas Bellinger goto send_pg; 1195e48354ceSNicholas Bellinger } 1196e48354ceSNicholas Bellinger 1197e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1198e48354ceSNicholas Bellinger tx_sent); 1199e48354ceSNicholas Bellinger return -1; 1200e48354ceSNicholas Bellinger } 1201e48354ceSNicholas Bellinger 1202e48354ceSNicholas Bellinger data_len -= sub_len; 1203e48354ceSNicholas Bellinger offset = 0; 1204e48354ceSNicholas Bellinger sg = sg_next(sg); 1205e48354ceSNicholas Bellinger } 1206e48354ceSNicholas Bellinger 1207e48354ceSNicholas Bellinger send_padding: 1208e48354ceSNicholas Bellinger if (cmd->padding) { 120940b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1210e48354ceSNicholas Bellinger 1211e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1212e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1213e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1214e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1215e48354ceSNicholas Bellinger goto send_padding; 1216e48354ceSNicholas Bellinger } 1217e48354ceSNicholas Bellinger return -1; 1218e48354ceSNicholas Bellinger } 1219e48354ceSNicholas Bellinger } 1220e48354ceSNicholas Bellinger 1221e48354ceSNicholas Bellinger send_datacrc: 1222e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 122340b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1224e48354ceSNicholas Bellinger 1225e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1226e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1227e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1228e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1229e48354ceSNicholas Bellinger goto send_datacrc; 1230e48354ceSNicholas Bellinger } 1231e48354ceSNicholas Bellinger return -1; 1232e48354ceSNicholas Bellinger } 1233e48354ceSNicholas Bellinger } 1234e48354ceSNicholas Bellinger 1235e48354ceSNicholas Bellinger return 0; 1236e48354ceSNicholas Bellinger } 1237e48354ceSNicholas Bellinger 1238e48354ceSNicholas Bellinger /* 1239e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1240e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1241e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1242e48354ceSNicholas Bellinger * 1243e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1244e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1245e48354ceSNicholas Bellinger */ 1246e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1247e48354ceSNicholas Bellinger { 1248e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1249baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1250e48354ceSNicholas Bellinger 1251baa4d64bSNicholas Bellinger login->login_failed = 1; 1252e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1253e48354ceSNicholas Bellinger 125468349756SNicholas Bellinger memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 125568349756SNicholas Bellinger 1256baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1257e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1258e48354ceSNicholas Bellinger hdr->status_class = status_class; 1259e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 126066c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1261e48354ceSNicholas Bellinger 1262baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1263e48354ceSNicholas Bellinger } 1264e48354ceSNicholas Bellinger 1265e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1266e48354ceSNicholas Bellinger { 1267e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1268e48354ceSNicholas Bellinger 1269e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1270e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1271e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1272e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1273e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1274e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1275e48354ceSNicholas Bellinger 1276e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1277e48354ceSNicholas Bellinger } 1278e48354ceSNicholas Bellinger 1279e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1280e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1281e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1282e48354ceSNicholas Bellinger { 1283e5a4b0bbSAl Viro int data = count->data_length, rx_loop = 0, total_rx = 0; 1284e48354ceSNicholas Bellinger struct msghdr msg; 1285e48354ceSNicholas Bellinger 1286e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1287e48354ceSNicholas Bellinger return -1; 1288e48354ceSNicholas Bellinger 1289e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1290e5a4b0bbSAl Viro iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, 1291e5a4b0bbSAl Viro count->iov, count->iov_count, data); 1292e48354ceSNicholas Bellinger 12932da62906SAl Viro while (msg_data_left(&msg)) { 12942da62906SAl Viro rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); 1295e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1296e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1297e48354ceSNicholas Bellinger rx_loop, total_rx); 1298e48354ceSNicholas Bellinger return rx_loop; 1299e48354ceSNicholas Bellinger } 1300e48354ceSNicholas Bellinger total_rx += rx_loop; 1301e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1302e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1303e48354ceSNicholas Bellinger } 1304e48354ceSNicholas Bellinger 1305e48354ceSNicholas Bellinger return total_rx; 1306e48354ceSNicholas Bellinger } 1307e48354ceSNicholas Bellinger 1308e48354ceSNicholas Bellinger int rx_data( 1309e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1310e48354ceSNicholas Bellinger struct kvec *iov, 1311e48354ceSNicholas Bellinger int iov_count, 1312e48354ceSNicholas Bellinger int data) 1313e48354ceSNicholas Bellinger { 1314e48354ceSNicholas Bellinger struct iscsi_data_count c; 1315e48354ceSNicholas Bellinger 1316e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1317e48354ceSNicholas Bellinger return -1; 1318e48354ceSNicholas Bellinger 1319e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1320e48354ceSNicholas Bellinger c.iov = iov; 1321e48354ceSNicholas Bellinger c.iov_count = iov_count; 1322e48354ceSNicholas Bellinger c.data_length = data; 1323e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1324e48354ceSNicholas Bellinger 1325e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1326e48354ceSNicholas Bellinger } 1327e48354ceSNicholas Bellinger 1328e48354ceSNicholas Bellinger int tx_data( 1329e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1330e48354ceSNicholas Bellinger struct kvec *iov, 1331e48354ceSNicholas Bellinger int iov_count, 1332e48354ceSNicholas Bellinger int data) 1333e48354ceSNicholas Bellinger { 13344113e47bSAl Viro struct msghdr msg; 13354113e47bSAl Viro int total_tx = 0; 1336e48354ceSNicholas Bellinger 1337e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1338e48354ceSNicholas Bellinger return -1; 1339e48354ceSNicholas Bellinger 13404113e47bSAl Viro if (data <= 0) { 13414113e47bSAl Viro pr_err("Data length is: %d\n", data); 13424113e47bSAl Viro return -1; 13434113e47bSAl Viro } 1344e48354ceSNicholas Bellinger 13454113e47bSAl Viro memset(&msg, 0, sizeof(struct msghdr)); 13464113e47bSAl Viro 13474113e47bSAl Viro iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, 13484113e47bSAl Viro iov, iov_count, data); 13494113e47bSAl Viro 13504113e47bSAl Viro while (msg_data_left(&msg)) { 13514113e47bSAl Viro int tx_loop = sock_sendmsg(conn->sock, &msg); 13524113e47bSAl Viro if (tx_loop <= 0) { 13534113e47bSAl Viro pr_debug("tx_loop: %d total_tx %d\n", 13544113e47bSAl Viro tx_loop, total_tx); 13554113e47bSAl Viro return tx_loop; 13564113e47bSAl Viro } 13574113e47bSAl Viro total_tx += tx_loop; 13584113e47bSAl Viro pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 13594113e47bSAl Viro tx_loop, total_tx, data); 13604113e47bSAl Viro } 13614113e47bSAl Viro 13624113e47bSAl Viro return total_tx; 1363e48354ceSNicholas Bellinger } 1364e48354ceSNicholas Bellinger 1365e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1366e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1367e48354ceSNicholas Bellinger u8 status_class, 1368e48354ceSNicholas Bellinger u8 status_detail) 1369e48354ceSNicholas Bellinger { 1370e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1371e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1372e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1373e48354ceSNicholas Bellinger 1374e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1375e48354ceSNicholas Bellinger if (!tiqn) 1376e48354ceSNicholas Bellinger return; 1377e48354ceSNicholas Bellinger 1378e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1379e48354ceSNicholas Bellinger 1380e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1381e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1382e48354ceSNicholas Bellinger ls->accepts++; 1383e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1384e48354ceSNicholas Bellinger ls->redirects++; 1385e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1386e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1387e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1388e48354ceSNicholas Bellinger ls->authenticate_fails++; 1389e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1390e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1391e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1392e48354ceSNicholas Bellinger ls->authorize_fails++; 1393e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1394e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1395e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1396e48354ceSNicholas Bellinger ls->negotiate_fails++; 1397e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1398e48354ceSNicholas Bellinger } else { 1399e48354ceSNicholas Bellinger ls->other_fails++; 1400e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1401e48354ceSNicholas Bellinger } 1402e48354ceSNicholas Bellinger 1403e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1404e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1405e48354ceSNicholas Bellinger if (conn->param_list) 1406e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1407e48354ceSNicholas Bellinger conn->param_list); 1408fdc84d11SJoern Engel strlcpy(ls->last_intr_fail_name, 1409fdc84d11SJoern Engel (intrname ? intrname->value : "Unknown"), 1410fdc84d11SJoern Engel sizeof(ls->last_intr_fail_name)); 1411e48354ceSNicholas Bellinger 1412baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1413baa4d64bSNicholas Bellinger 1414dc58f760SAndy Grover ls->last_intr_fail_sockaddr = conn->login_sockaddr; 1415e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1416e48354ceSNicholas Bellinger } 1417e48354ceSNicholas Bellinger 1418e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1419e48354ceSNicholas Bellinger } 1420e48354ceSNicholas Bellinger 1421e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1422e48354ceSNicholas Bellinger { 1423e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1424e48354ceSNicholas Bellinger 142517c61ad6SNicholas Bellinger if (!conn) 1426e48354ceSNicholas Bellinger return NULL; 1427e48354ceSNicholas Bellinger 142817c61ad6SNicholas Bellinger tpg = conn->tpg; 1429e48354ceSNicholas Bellinger if (!tpg) 1430e48354ceSNicholas Bellinger return NULL; 1431e48354ceSNicholas Bellinger 1432e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1433e48354ceSNicholas Bellinger return NULL; 1434e48354ceSNicholas Bellinger 1435e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1436e48354ceSNicholas Bellinger } 1437