1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the iSCSI Target specific utility functions. 3e48354ceSNicholas Bellinger * 4e48354ceSNicholas Bellinger * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Licensed to the Linux Foundation under the General Public License (GPL) version 2. 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 9e48354ceSNicholas Bellinger * 10e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 11e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 12e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 13e48354ceSNicholas Bellinger * (at your option) any later version. 14e48354ceSNicholas Bellinger * 15e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 16e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 17e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18e48354ceSNicholas Bellinger * GNU General Public License for more details. 19e48354ceSNicholas Bellinger ******************************************************************************/ 20e48354ceSNicholas Bellinger 21e48354ceSNicholas Bellinger #include <linux/list.h> 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> 26e48354ceSNicholas Bellinger #include <target/target_core_configfs.h> 27baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 28e48354ceSNicholas Bellinger 29e48354ceSNicholas Bellinger #include "iscsi_target_core.h" 30e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 31e48354ceSNicholas Bellinger #include "iscsi_target_seq_pdu_list.h" 32e48354ceSNicholas Bellinger #include "iscsi_target_datain_values.h" 33e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_erl1.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 37e48354ceSNicholas Bellinger #include "iscsi_target_tq.h" 38e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 39e48354ceSNicholas Bellinger #include "iscsi_target.h" 40e48354ceSNicholas Bellinger 41e48354ceSNicholas Bellinger #define PRINT_BUFF(buff, len) \ 42e48354ceSNicholas Bellinger { \ 43e48354ceSNicholas Bellinger int zzz; \ 44e48354ceSNicholas Bellinger \ 45e48354ceSNicholas Bellinger pr_debug("%d:\n", __LINE__); \ 46e48354ceSNicholas Bellinger for (zzz = 0; zzz < len; zzz++) { \ 47e48354ceSNicholas Bellinger if (zzz % 16 == 0) { \ 48e48354ceSNicholas Bellinger if (zzz) \ 49e48354ceSNicholas Bellinger pr_debug("\n"); \ 50e48354ceSNicholas Bellinger pr_debug("%4i: ", zzz); \ 51e48354ceSNicholas Bellinger } \ 52e48354ceSNicholas Bellinger pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 53e48354ceSNicholas Bellinger } \ 54e48354ceSNicholas Bellinger if ((len + 1) % 16) \ 55e48354ceSNicholas Bellinger pr_debug("\n"); \ 56e48354ceSNicholas Bellinger } 57e48354ceSNicholas Bellinger 58e48354ceSNicholas Bellinger extern struct list_head g_tiqn_list; 59e48354ceSNicholas Bellinger extern spinlock_t tiqn_lock; 60e48354ceSNicholas Bellinger 61e48354ceSNicholas Bellinger /* 62e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 63e48354ceSNicholas Bellinger */ 64e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 65e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 66e48354ceSNicholas Bellinger u32 offset, 67e48354ceSNicholas Bellinger u32 xfer_len, 68e48354ceSNicholas Bellinger int recovery, 69e48354ceSNicholas Bellinger u32 r2t_sn) 70e48354ceSNicholas Bellinger { 71e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 72e48354ceSNicholas Bellinger 73e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 74e48354ceSNicholas Bellinger if (!r2t) { 75e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 76e48354ceSNicholas Bellinger return -1; 77e48354ceSNicholas Bellinger } 78e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 79e48354ceSNicholas Bellinger 80e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 81e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 82e48354ceSNicholas Bellinger r2t->offset = offset; 83e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 84e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 85e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 86e48354ceSNicholas Bellinger 87e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 88e48354ceSNicholas Bellinger 89e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 90e48354ceSNicholas Bellinger return 0; 91e48354ceSNicholas Bellinger } 92e48354ceSNicholas Bellinger 93e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 94e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 95e48354ceSNicholas Bellinger u32 offset, 96e48354ceSNicholas Bellinger u32 length) 97e48354ceSNicholas Bellinger { 98e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 99e48354ceSNicholas Bellinger 100e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 101e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 102e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 103e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 104e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 105e48354ceSNicholas Bellinger return r2t; 106e48354ceSNicholas Bellinger } 107e48354ceSNicholas Bellinger } 108e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 109e48354ceSNicholas Bellinger 110e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 111e48354ceSNicholas Bellinger " %u\n", offset, length); 112e48354ceSNicholas Bellinger return NULL; 113e48354ceSNicholas Bellinger } 114e48354ceSNicholas Bellinger 115e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 116e48354ceSNicholas Bellinger { 117e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 118e48354ceSNicholas Bellinger 119e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 120e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 121e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 122e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 123e48354ceSNicholas Bellinger return r2t; 124e48354ceSNicholas Bellinger } 125e48354ceSNicholas Bellinger } 126e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 127e48354ceSNicholas Bellinger 128e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 129e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 130e48354ceSNicholas Bellinger return NULL; 131e48354ceSNicholas Bellinger } 132e48354ceSNicholas Bellinger 133e48354ceSNicholas Bellinger /* 134e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 135e48354ceSNicholas Bellinger */ 136e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 137e48354ceSNicholas Bellinger { 138e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 139e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 140e48354ceSNicholas Bellinger } 141e48354ceSNicholas Bellinger 142e48354ceSNicholas Bellinger void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 143e48354ceSNicholas Bellinger { 144e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 145e48354ceSNicholas Bellinger 146e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 147e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 148e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 149e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 150e48354ceSNicholas Bellinger } 151e48354ceSNicholas Bellinger 152cdb72665SNicholas Bellinger struct iscsi_cmd *iscsit_alloc_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) 153cdb72665SNicholas Bellinger { 154cdb72665SNicholas Bellinger struct iscsi_cmd *cmd; 155cdb72665SNicholas Bellinger 156cdb72665SNicholas Bellinger cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask); 157cdb72665SNicholas Bellinger if (!cmd) 158cdb72665SNicholas Bellinger return NULL; 159cdb72665SNicholas Bellinger 160cdb72665SNicholas Bellinger cmd->release_cmd = &iscsit_release_cmd; 161cdb72665SNicholas Bellinger return cmd; 162cdb72665SNicholas Bellinger } 163cdb72665SNicholas Bellinger 164e48354ceSNicholas Bellinger /* 165e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 166e48354ceSNicholas Bellinger * iSCSI NopINs. 167e48354ceSNicholas Bellinger */ 168e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) 169e48354ceSNicholas Bellinger { 170e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 171e48354ceSNicholas Bellinger 172cdb72665SNicholas Bellinger cmd = conn->conn_transport->iscsit_alloc_cmd(conn, gfp_mask); 173e48354ceSNicholas Bellinger if (!cmd) { 174e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_cmd.\n"); 175e48354ceSNicholas Bellinger return NULL; 176e48354ceSNicholas Bellinger } 177e48354ceSNicholas Bellinger cmd->conn = conn; 1782fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 179e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 180e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 181e48354ceSNicholas Bellinger init_completion(&cmd->reject_comp); 182e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 183e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 184e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 185e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 186e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 187e48354ceSNicholas Bellinger 188e48354ceSNicholas Bellinger return cmd; 189e48354ceSNicholas Bellinger } 190cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 191e48354ceSNicholas Bellinger 192e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 193e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 194e48354ceSNicholas Bellinger u32 seq_send_order) 195e48354ceSNicholas Bellinger { 196e48354ceSNicholas Bellinger u32 i; 197e48354ceSNicholas Bellinger 198e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 199e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 200e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 201e48354ceSNicholas Bellinger 202e48354ceSNicholas Bellinger return NULL; 203e48354ceSNicholas Bellinger } 204e48354ceSNicholas Bellinger 205e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 206e48354ceSNicholas Bellinger { 207e48354ceSNicholas Bellinger u32 i; 208e48354ceSNicholas Bellinger 209e48354ceSNicholas Bellinger if (!cmd->seq_list) { 210e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 211e48354ceSNicholas Bellinger return NULL; 212e48354ceSNicholas Bellinger } 213e48354ceSNicholas Bellinger 214e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 215e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 216e48354ceSNicholas Bellinger continue; 217e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 218e48354ceSNicholas Bellinger cmd->seq_send_order++; 219e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 220e48354ceSNicholas Bellinger } 221e48354ceSNicholas Bellinger } 222e48354ceSNicholas Bellinger 223e48354ceSNicholas Bellinger return NULL; 224e48354ceSNicholas Bellinger } 225e48354ceSNicholas Bellinger 226e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 227e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 228e48354ceSNicholas Bellinger u32 r2t_sn) 229e48354ceSNicholas Bellinger { 230e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 231e48354ceSNicholas Bellinger 232e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 233e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 234e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 235e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 236e48354ceSNicholas Bellinger return r2t; 237e48354ceSNicholas Bellinger } 238e48354ceSNicholas Bellinger } 239e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 240e48354ceSNicholas Bellinger 241e48354ceSNicholas Bellinger return NULL; 242e48354ceSNicholas Bellinger } 243e48354ceSNicholas Bellinger 244e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 245e48354ceSNicholas Bellinger { 246e48354ceSNicholas Bellinger int ret; 247e48354ceSNicholas Bellinger 248e48354ceSNicholas Bellinger /* 249e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 250e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 251e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 252e48354ceSNicholas Bellinger * CRC failures. 253e48354ceSNicholas Bellinger */ 254e48354ceSNicholas Bellinger if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { 255e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 256e48354ceSNicholas Bellinger " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn, 257e48354ceSNicholas Bellinger sess->max_cmd_sn); 258e48354ceSNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 259e48354ceSNicholas Bellinger 260e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 261e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 262e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 263e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 264e48354ceSNicholas Bellinger sess->exp_cmd_sn); 265e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 266e48354ceSNicholas Bellinger 267e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 268e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 269e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 270e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 271e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 272e48354ceSNicholas Bellinger 273e48354ceSNicholas Bellinger } else { 274e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 275e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 276e48354ceSNicholas Bellinger sess->exp_cmd_sn); 277e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 278e48354ceSNicholas Bellinger } 279e48354ceSNicholas Bellinger 280e48354ceSNicholas Bellinger return ret; 281e48354ceSNicholas Bellinger } 282e48354ceSNicholas Bellinger 283e48354ceSNicholas Bellinger /* 284e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 285e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 286e48354ceSNicholas Bellinger */ 287e48354ceSNicholas Bellinger int iscsit_sequence_cmd( 288e48354ceSNicholas Bellinger struct iscsi_conn *conn, 289e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 29050e5c87dSChristoph Hellwig __be32 cmdsn) 291e48354ceSNicholas Bellinger { 292e48354ceSNicholas Bellinger int ret; 293e48354ceSNicholas Bellinger int cmdsn_ret; 294e48354ceSNicholas Bellinger 295e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 296e48354ceSNicholas Bellinger 29750e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 298e48354ceSNicholas Bellinger switch (cmdsn_ret) { 299e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 300e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 301e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 302e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 303e48354ceSNicholas Bellinger break; 304e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 30550e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 306e48354ceSNicholas Bellinger break; 307e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 308e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 309e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 310e48354ceSNicholas Bellinger ret = cmdsn_ret; 311e48354ceSNicholas Bellinger break; 312e48354ceSNicholas Bellinger default: 313e48354ceSNicholas Bellinger ret = cmdsn_ret; 314e48354ceSNicholas Bellinger break; 315e48354ceSNicholas Bellinger } 316e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 317e48354ceSNicholas Bellinger 318e48354ceSNicholas Bellinger return ret; 319e48354ceSNicholas Bellinger } 320e48354ceSNicholas Bellinger 321e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 322e48354ceSNicholas Bellinger { 323e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 324e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 325e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 326e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 327e48354ceSNicholas Bellinger 328e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 329e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 330e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 331e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 332e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 333e48354ceSNicholas Bellinger return -1; 334e48354ceSNicholas Bellinger } 335e48354ceSNicholas Bellinger 336e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 337e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 338e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 339e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 340e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 341e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 342e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 343e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 344e48354ceSNicholas Bellinger return -1; 345e48354ceSNicholas Bellinger } 346e48354ceSNicholas Bellinger 347e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 348e48354ceSNicholas Bellinger return 0; 349e48354ceSNicholas Bellinger 350ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 351e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 352e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 353e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 354e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 355e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 356e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 357ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 358e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 359e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 360e48354ceSNicholas Bellinger return -1; 361e48354ceSNicholas Bellinger } 362e48354ceSNicholas Bellinger return 0; 363e48354ceSNicholas Bellinger } 364e48354ceSNicholas Bellinger 365e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 366e48354ceSNicholas Bellinger struct iscsi_conn *conn, 36766c7db68SChristoph Hellwig itt_t init_task_tag) 368e48354ceSNicholas Bellinger { 369e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 370e48354ceSNicholas Bellinger 371e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3722fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 373e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 374e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 375e48354ceSNicholas Bellinger return cmd; 376e48354ceSNicholas Bellinger } 377e48354ceSNicholas Bellinger } 378e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 379e48354ceSNicholas Bellinger 380e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 381e48354ceSNicholas Bellinger init_task_tag, conn->cid); 382e48354ceSNicholas Bellinger return NULL; 383e48354ceSNicholas Bellinger } 384e48354ceSNicholas Bellinger 385e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 386e48354ceSNicholas Bellinger struct iscsi_conn *conn, 38766c7db68SChristoph Hellwig itt_t init_task_tag, 388e48354ceSNicholas Bellinger u32 length) 389e48354ceSNicholas Bellinger { 390e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 391e48354ceSNicholas Bellinger 392e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3932fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 394e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 395e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 396e48354ceSNicholas Bellinger return cmd; 397e48354ceSNicholas Bellinger } 398e48354ceSNicholas Bellinger } 399e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 400e48354ceSNicholas Bellinger 401e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 402e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 403e48354ceSNicholas Bellinger if (length) 404e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 405e48354ceSNicholas Bellinger 406e48354ceSNicholas Bellinger return NULL; 407e48354ceSNicholas Bellinger } 408e48354ceSNicholas Bellinger 409e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 410e48354ceSNicholas Bellinger struct iscsi_conn *conn, 411e48354ceSNicholas Bellinger u32 targ_xfer_tag) 412e48354ceSNicholas Bellinger { 413e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 414e48354ceSNicholas Bellinger 415e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4162fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 417e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 418e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 419e48354ceSNicholas Bellinger return cmd; 420e48354ceSNicholas Bellinger } 421e48354ceSNicholas Bellinger } 422e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 423e48354ceSNicholas Bellinger 424e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 425e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 426e48354ceSNicholas Bellinger return NULL; 427e48354ceSNicholas Bellinger } 428e48354ceSNicholas Bellinger 429e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 430e48354ceSNicholas Bellinger struct iscsi_session *sess, 431e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 432e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 43366c7db68SChristoph Hellwig itt_t init_task_tag) 434e48354ceSNicholas Bellinger { 435e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 436e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 437e48354ceSNicholas Bellinger /* 438e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 439e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 440e48354ceSNicholas Bellinger */ 441e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 442e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 443e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4442fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 445e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 446e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 447e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 448e48354ceSNicholas Bellinger 449e48354ceSNicholas Bellinger *cr_ptr = cr; 450e48354ceSNicholas Bellinger *cmd_ptr = cmd; 451e48354ceSNicholas Bellinger return -2; 452e48354ceSNicholas Bellinger } 453e48354ceSNicholas Bellinger } 454e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 455e48354ceSNicholas Bellinger } 456e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 457e48354ceSNicholas Bellinger /* 458e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 459e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 460e48354ceSNicholas Bellinger */ 461e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 462e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 463e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4642fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 465e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 466e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 467e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 468e48354ceSNicholas Bellinger 469e48354ceSNicholas Bellinger *cr_ptr = cr; 470e48354ceSNicholas Bellinger *cmd_ptr = cmd; 471e48354ceSNicholas Bellinger return 0; 472e48354ceSNicholas Bellinger } 473e48354ceSNicholas Bellinger } 474e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 475e48354ceSNicholas Bellinger } 476e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 477e48354ceSNicholas Bellinger 478e48354ceSNicholas Bellinger return -1; 479e48354ceSNicholas Bellinger } 480e48354ceSNicholas Bellinger 481e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 482e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 483e48354ceSNicholas Bellinger struct iscsi_conn *conn, 484e48354ceSNicholas Bellinger u8 state) 485e48354ceSNicholas Bellinger { 486e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 487e48354ceSNicholas Bellinger 488e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 489e48354ceSNicholas Bellinger if (!qr) { 490e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 491e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 492e48354ceSNicholas Bellinger return; 493e48354ceSNicholas Bellinger } 494e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 495e48354ceSNicholas Bellinger qr->cmd = cmd; 496e48354ceSNicholas Bellinger qr->state = state; 497e48354ceSNicholas Bellinger 498e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 499e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 500e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 501e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 502e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 503e48354ceSNicholas Bellinger 504d5627acbSRoland Dreier wake_up(&conn->queues_wq); 505e48354ceSNicholas Bellinger } 506e48354ceSNicholas Bellinger 507e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 508e48354ceSNicholas Bellinger { 509e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 510e48354ceSNicholas Bellinger 511e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 512e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 513e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 514e48354ceSNicholas Bellinger return NULL; 515e48354ceSNicholas Bellinger } 5161f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5171f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 518e48354ceSNicholas Bellinger 519e48354ceSNicholas Bellinger list_del(&qr->qr_list); 520e48354ceSNicholas Bellinger if (qr->cmd) 521e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 522e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 523e48354ceSNicholas Bellinger 524e48354ceSNicholas Bellinger return qr; 525e48354ceSNicholas Bellinger } 526e48354ceSNicholas Bellinger 527e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 528e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 529e48354ceSNicholas Bellinger struct iscsi_conn *conn) 530e48354ceSNicholas Bellinger { 531e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 532e48354ceSNicholas Bellinger 533e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 534e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 535e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 536e48354ceSNicholas Bellinger return; 537e48354ceSNicholas Bellinger } 538e48354ceSNicholas Bellinger 539e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 540e48354ceSNicholas Bellinger if (qr->cmd != cmd) 541e48354ceSNicholas Bellinger continue; 542e48354ceSNicholas Bellinger 543e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 544e48354ceSNicholas Bellinger list_del(&qr->qr_list); 545e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 546e48354ceSNicholas Bellinger } 547e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 548e48354ceSNicholas Bellinger 549e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 550e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 551e48354ceSNicholas Bellinger cmd->init_task_tag, 552e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 553e48354ceSNicholas Bellinger } 554e48354ceSNicholas Bellinger } 555e48354ceSNicholas Bellinger 556e48354ceSNicholas Bellinger void iscsit_add_cmd_to_response_queue( 557e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 558e48354ceSNicholas Bellinger struct iscsi_conn *conn, 559e48354ceSNicholas Bellinger u8 state) 560e48354ceSNicholas Bellinger { 561e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 562e48354ceSNicholas Bellinger 563e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 564e48354ceSNicholas Bellinger if (!qr) { 565e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 566e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 567e48354ceSNicholas Bellinger return; 568e48354ceSNicholas Bellinger } 569e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 570e48354ceSNicholas Bellinger qr->cmd = cmd; 571e48354ceSNicholas Bellinger qr->state = state; 572e48354ceSNicholas Bellinger 573e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 574e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 575e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 576e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 577e48354ceSNicholas Bellinger 578d5627acbSRoland Dreier wake_up(&conn->queues_wq); 579e48354ceSNicholas Bellinger } 580e48354ceSNicholas Bellinger 581e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 582e48354ceSNicholas Bellinger { 583e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 584e48354ceSNicholas Bellinger 585e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 586e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 587e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 588e48354ceSNicholas Bellinger return NULL; 589e48354ceSNicholas Bellinger } 590e48354ceSNicholas Bellinger 5911f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 5921f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 593e48354ceSNicholas Bellinger 594e48354ceSNicholas Bellinger list_del(&qr->qr_list); 595e48354ceSNicholas Bellinger if (qr->cmd) 596e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 597e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 598e48354ceSNicholas Bellinger 599e48354ceSNicholas Bellinger return qr; 600e48354ceSNicholas Bellinger } 601e48354ceSNicholas Bellinger 602e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 603e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 604e48354ceSNicholas Bellinger struct iscsi_conn *conn) 605e48354ceSNicholas Bellinger { 606e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 607e48354ceSNicholas Bellinger 608e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 609e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 610e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 611e48354ceSNicholas Bellinger return; 612e48354ceSNicholas Bellinger } 613e48354ceSNicholas Bellinger 614e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 615e48354ceSNicholas Bellinger qr_list) { 616e48354ceSNicholas Bellinger if (qr->cmd != cmd) 617e48354ceSNicholas Bellinger continue; 618e48354ceSNicholas Bellinger 619e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 620e48354ceSNicholas Bellinger list_del(&qr->qr_list); 621e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 622e48354ceSNicholas Bellinger } 623e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 624e48354ceSNicholas Bellinger 625e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 626e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 627e48354ceSNicholas Bellinger cmd->init_task_tag, 628e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 629e48354ceSNicholas Bellinger } 630e48354ceSNicholas Bellinger } 631e48354ceSNicholas Bellinger 632d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 633d5627acbSRoland Dreier { 634d5627acbSRoland Dreier bool empty; 635d5627acbSRoland Dreier 636d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 637d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 638d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 639d5627acbSRoland Dreier 640d5627acbSRoland Dreier if (!empty) 641d5627acbSRoland Dreier return empty; 642d5627acbSRoland Dreier 643d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 644d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 645d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 646d5627acbSRoland Dreier 647d5627acbSRoland Dreier return empty; 648d5627acbSRoland Dreier } 649d5627acbSRoland Dreier 650e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 651e48354ceSNicholas Bellinger { 652e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 653e48354ceSNicholas Bellinger 654e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 655e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 656e48354ceSNicholas Bellinger list_del(&qr->qr_list); 657e48354ceSNicholas Bellinger if (qr->cmd) 658e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 659e48354ceSNicholas Bellinger 660e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 661e48354ceSNicholas Bellinger } 662e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 663e48354ceSNicholas Bellinger 664e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 665e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 666e48354ceSNicholas Bellinger qr_list) { 667e48354ceSNicholas Bellinger list_del(&qr->qr_list); 668e48354ceSNicholas Bellinger if (qr->cmd) 669e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 670e48354ceSNicholas Bellinger 671e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 672e48354ceSNicholas Bellinger } 673e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 674e48354ceSNicholas Bellinger } 675e48354ceSNicholas Bellinger 676e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 677e48354ceSNicholas Bellinger { 678e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 679e48354ceSNicholas Bellinger 680e48354ceSNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 681e48354ceSNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 682e48354ceSNicholas Bellinger 683e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 684e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 685e48354ceSNicholas Bellinger kfree(cmd->seq_list); 686e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 687e48354ceSNicholas Bellinger kfree(cmd->iov_data); 688e48354ceSNicholas Bellinger 689e48354ceSNicholas Bellinger if (conn) { 690e48354ceSNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 691e48354ceSNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 692e48354ceSNicholas Bellinger } 693e48354ceSNicholas Bellinger 694e48354ceSNicholas Bellinger kmem_cache_free(lio_cmd_cache, cmd); 695e48354ceSNicholas Bellinger } 696e48354ceSNicholas Bellinger 697d270190aSNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd) 698d270190aSNicholas Bellinger { 699d270190aSNicholas Bellinger /* 70020879696SMasanari Iida * Determine if a struct se_cmd is associated with 701d270190aSNicholas Bellinger * this struct iscsi_cmd. 702d270190aSNicholas Bellinger */ 703d270190aSNicholas Bellinger switch (cmd->iscsi_opcode) { 704d270190aSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 705cdb72665SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) 706cdb72665SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 707cdb72665SNicholas Bellinger /* 708cdb72665SNicholas Bellinger * Fallthrough 709cdb72665SNicholas Bellinger */ 710d270190aSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 711d270190aSNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 1); 712d270190aSNicholas Bellinger break; 713c1ce4bd5SNicholas Bellinger case ISCSI_OP_REJECT: 714c1ce4bd5SNicholas Bellinger /* 715c1ce4bd5SNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 716c1ce4bd5SNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 717c1ce4bd5SNicholas Bellinger * associated cmd->se_cmd needs to be released. 718c1ce4bd5SNicholas Bellinger */ 719c1ce4bd5SNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 720c1ce4bd5SNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 1); 721c1ce4bd5SNicholas Bellinger break; 722c1ce4bd5SNicholas Bellinger } 723c1ce4bd5SNicholas Bellinger /* Fall-through */ 724d270190aSNicholas Bellinger default: 725cdb72665SNicholas Bellinger cmd->release_cmd(cmd); 726d270190aSNicholas Bellinger break; 727d270190aSNicholas Bellinger } 728d270190aSNicholas Bellinger } 729d270190aSNicholas Bellinger 730e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 731e48354ceSNicholas Bellinger { 732e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 733e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 734e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 735e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 736e48354ceSNicholas Bellinger if (in_interrupt()) 737e48354ceSNicholas Bellinger return 2; 738e48354ceSNicholas Bellinger 739e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 740e48354ceSNicholas Bellinger return 1; 741e48354ceSNicholas Bellinger } 742e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 743e48354ceSNicholas Bellinger 744e48354ceSNicholas Bellinger return 0; 745e48354ceSNicholas Bellinger } 746e48354ceSNicholas Bellinger 747e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 748e48354ceSNicholas Bellinger { 749e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 750e48354ceSNicholas Bellinger sess->session_usage_count--; 751e48354ceSNicholas Bellinger 752e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 753e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 754e48354ceSNicholas Bellinger 755e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 756e48354ceSNicholas Bellinger } 757e48354ceSNicholas Bellinger 758e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 759e48354ceSNicholas Bellinger { 760e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 761e48354ceSNicholas Bellinger sess->session_usage_count++; 762e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 763e48354ceSNicholas Bellinger } 764e48354ceSNicholas Bellinger 765e48354ceSNicholas Bellinger /* 766e48354ceSNicholas Bellinger * Setup conn->if_marker and conn->of_marker values based upon 767e48354ceSNicholas Bellinger * the initial marker-less interval. (see iSCSI v19 A.2) 768e48354ceSNicholas Bellinger */ 769e48354ceSNicholas Bellinger int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) 770e48354ceSNicholas Bellinger { 771e48354ceSNicholas Bellinger int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; 772e48354ceSNicholas Bellinger /* 773e48354ceSNicholas Bellinger * IFMarkInt and OFMarkInt are negotiated as 32-bit words. 774e48354ceSNicholas Bellinger */ 775e48354ceSNicholas Bellinger u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); 776e48354ceSNicholas Bellinger u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); 777e48354ceSNicholas Bellinger 778e48354ceSNicholas Bellinger if (conn->conn_ops->OFMarker) { 779e48354ceSNicholas Bellinger /* 780e48354ceSNicholas Bellinger * Account for the first Login Command received not 781e48354ceSNicholas Bellinger * via iscsi_recv_msg(). 782e48354ceSNicholas Bellinger */ 783e48354ceSNicholas Bellinger conn->of_marker += ISCSI_HDR_LEN; 784e48354ceSNicholas Bellinger if (conn->of_marker <= OFMarkInt) { 785e48354ceSNicholas Bellinger conn->of_marker = (OFMarkInt - conn->of_marker); 786e48354ceSNicholas Bellinger } else { 787e48354ceSNicholas Bellinger login_ofmarker_count = (conn->of_marker / OFMarkInt); 788e48354ceSNicholas Bellinger next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + 789e48354ceSNicholas Bellinger (login_ofmarker_count * MARKER_SIZE); 790e48354ceSNicholas Bellinger conn->of_marker = (next_marker - conn->of_marker); 791e48354ceSNicholas Bellinger } 792e48354ceSNicholas Bellinger conn->of_marker_offset = 0; 793e48354ceSNicholas Bellinger pr_debug("Setting OFMarker value to %u based on Initial" 794e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->of_marker); 795e48354ceSNicholas Bellinger } 796e48354ceSNicholas Bellinger 797e48354ceSNicholas Bellinger if (conn->conn_ops->IFMarker) { 798e48354ceSNicholas Bellinger if (conn->if_marker <= IFMarkInt) { 799e48354ceSNicholas Bellinger conn->if_marker = (IFMarkInt - conn->if_marker); 800e48354ceSNicholas Bellinger } else { 801e48354ceSNicholas Bellinger login_ifmarker_count = (conn->if_marker / IFMarkInt); 802e48354ceSNicholas Bellinger next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + 803e48354ceSNicholas Bellinger (login_ifmarker_count * MARKER_SIZE); 804e48354ceSNicholas Bellinger conn->if_marker = (next_marker - conn->if_marker); 805e48354ceSNicholas Bellinger } 806e48354ceSNicholas Bellinger pr_debug("Setting IFMarker value to %u based on Initial" 807e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->if_marker); 808e48354ceSNicholas Bellinger } 809e48354ceSNicholas Bellinger 810e48354ceSNicholas Bellinger return 0; 811e48354ceSNicholas Bellinger } 812e48354ceSNicholas Bellinger 813e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 814e48354ceSNicholas Bellinger { 815e48354ceSNicholas Bellinger struct iscsi_conn *conn; 816e48354ceSNicholas Bellinger 817e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 818e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 819e48354ceSNicholas Bellinger if ((conn->cid == cid) && 820e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 821e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 822e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 823e48354ceSNicholas Bellinger return conn; 824e48354ceSNicholas Bellinger } 825e48354ceSNicholas Bellinger } 826e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 827e48354ceSNicholas Bellinger 828e48354ceSNicholas Bellinger return NULL; 829e48354ceSNicholas Bellinger } 830e48354ceSNicholas Bellinger 831e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 832e48354ceSNicholas Bellinger { 833e48354ceSNicholas Bellinger struct iscsi_conn *conn; 834e48354ceSNicholas Bellinger 835e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 836e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 837e48354ceSNicholas Bellinger if (conn->cid == cid) { 838e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 839e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 840e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 841e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 842e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 843e48354ceSNicholas Bellinger return conn; 844e48354ceSNicholas Bellinger } 845e48354ceSNicholas Bellinger } 846e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 847e48354ceSNicholas Bellinger 848e48354ceSNicholas Bellinger return NULL; 849e48354ceSNicholas Bellinger } 850e48354ceSNicholas Bellinger 851e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 852e48354ceSNicholas Bellinger { 853e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 854e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 855e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 856e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 857e48354ceSNicholas Bellinger 858e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 859e48354ceSNicholas Bellinger return; 860e48354ceSNicholas Bellinger } 861e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 862e48354ceSNicholas Bellinger } 863e48354ceSNicholas Bellinger 864e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 865e48354ceSNicholas Bellinger { 866e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 867e48354ceSNicholas Bellinger conn->conn_usage_count--; 868e48354ceSNicholas Bellinger 869e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 870e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 871e48354ceSNicholas Bellinger 872e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 873e48354ceSNicholas Bellinger } 874e48354ceSNicholas Bellinger 875e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 876e48354ceSNicholas Bellinger { 877e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 878e48354ceSNicholas Bellinger conn->conn_usage_count++; 879e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 880e48354ceSNicholas Bellinger } 881e48354ceSNicholas Bellinger 882e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 883e48354ceSNicholas Bellinger { 884e48354ceSNicholas Bellinger u8 state; 885e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 886e48354ceSNicholas Bellinger 887e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); 888e48354ceSNicholas Bellinger if (!cmd) 889e48354ceSNicholas Bellinger return -1; 890e48354ceSNicholas Bellinger 891e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 892e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 893e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 89466c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 895e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 896e48354ceSNicholas Bellinger cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : 897e48354ceSNicholas Bellinger 0xFFFFFFFF; 898e48354ceSNicholas Bellinger if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) 899e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 900e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 901e48354ceSNicholas Bellinger 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 913e48354ceSNicholas Bellinger static void iscsit_handle_nopin_response_timeout(unsigned long data) 914e48354ceSNicholas Bellinger { 915e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 916e48354ceSNicholas Bellinger 917e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 918e48354ceSNicholas Bellinger 919e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 920e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 921e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 922e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 923e48354ceSNicholas Bellinger return; 924e48354ceSNicholas Bellinger } 925e48354ceSNicholas Bellinger 926e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 927e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 928e48354ceSNicholas Bellinger conn->sess->sid); 929e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 930e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 931e48354ceSNicholas Bellinger 932e48354ceSNicholas Bellinger { 933e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 934e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 935e48354ceSNicholas Bellinger 936e48354ceSNicholas Bellinger if (tiqn) { 937e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 938e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9398359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 940e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 941e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 942e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 943e48354ceSNicholas Bellinger conn->sess->conn_timeout_errors++; 944e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 945e48354ceSNicholas Bellinger } 946e48354ceSNicholas Bellinger } 947e48354ceSNicholas Bellinger 948e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 949e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 950e48354ceSNicholas Bellinger } 951e48354ceSNicholas Bellinger 952e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 953e48354ceSNicholas Bellinger { 954e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 955e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 956e48354ceSNicholas Bellinger 957e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 958e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 959e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 960e48354ceSNicholas Bellinger return; 961e48354ceSNicholas Bellinger } 962e48354ceSNicholas Bellinger 963e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 964e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 965e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 966e48354ceSNicholas Bellinger } 967e48354ceSNicholas Bellinger 968e48354ceSNicholas Bellinger /* 969e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 970e48354ceSNicholas Bellinger */ 971e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 972e48354ceSNicholas Bellinger { 973e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 974e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 975e48354ceSNicholas Bellinger 976e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 977e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 978e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 979e48354ceSNicholas Bellinger return; 980e48354ceSNicholas Bellinger } 981e48354ceSNicholas Bellinger 982e48354ceSNicholas Bellinger init_timer(&conn->nopin_response_timer); 983e48354ceSNicholas Bellinger conn->nopin_response_timer.expires = 984e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ); 985e48354ceSNicholas Bellinger conn->nopin_response_timer.data = (unsigned long)conn; 986e48354ceSNicholas Bellinger conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 987e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 988e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 989e48354ceSNicholas Bellinger add_timer(&conn->nopin_response_timer); 990e48354ceSNicholas Bellinger 991e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 992e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 993e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 994e48354ceSNicholas Bellinger } 995e48354ceSNicholas Bellinger 996e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 997e48354ceSNicholas Bellinger { 998e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 999e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1000e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1001e48354ceSNicholas Bellinger return; 1002e48354ceSNicholas Bellinger } 1003e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1004e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1005e48354ceSNicholas Bellinger 1006e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 1007e48354ceSNicholas Bellinger 1008e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1009e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1010e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1011e48354ceSNicholas Bellinger } 1012e48354ceSNicholas Bellinger 1013e48354ceSNicholas Bellinger static void iscsit_handle_nopin_timeout(unsigned long data) 1014e48354ceSNicholas Bellinger { 1015e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 1016e48354ceSNicholas Bellinger 1017e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1018e48354ceSNicholas Bellinger 1019e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1020e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1021e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1022e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1023e48354ceSNicholas Bellinger return; 1024e48354ceSNicholas Bellinger } 1025e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1026e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1027e48354ceSNicholas Bellinger 1028e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1029e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1030e48354ceSNicholas Bellinger } 1031e48354ceSNicholas Bellinger 1032e48354ceSNicholas Bellinger /* 1033e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1034e48354ceSNicholas Bellinger */ 1035e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1036e48354ceSNicholas Bellinger { 1037e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1038e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1039e48354ceSNicholas Bellinger /* 1040e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1041e48354ceSNicholas Bellinger */ 1042e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1043e48354ceSNicholas Bellinger return; 1044e48354ceSNicholas Bellinger 1045e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1046e48354ceSNicholas Bellinger return; 1047e48354ceSNicholas Bellinger 1048e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1049e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1050e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1051e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1052e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1053e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1054e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1055e48354ceSNicholas Bellinger 1056e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1057e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1058e48354ceSNicholas Bellinger } 1059e48354ceSNicholas Bellinger 1060e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1061e48354ceSNicholas Bellinger { 1062e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1063e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1064e48354ceSNicholas Bellinger /* 1065e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1066e48354ceSNicholas Bellinger */ 1067e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1068e48354ceSNicholas Bellinger return; 1069e48354ceSNicholas Bellinger 1070e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1071e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1072e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1073e48354ceSNicholas Bellinger return; 1074e48354ceSNicholas Bellinger } 1075e48354ceSNicholas Bellinger 1076e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1077e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1078e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1079e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1080e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1081e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1082e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1083e48354ceSNicholas Bellinger 1084e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1085e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1086e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1087e48354ceSNicholas Bellinger } 1088e48354ceSNicholas Bellinger 1089e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1090e48354ceSNicholas Bellinger { 1091e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1092e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1093e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1094e48354ceSNicholas Bellinger return; 1095e48354ceSNicholas Bellinger } 1096e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1097e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1098e48354ceSNicholas Bellinger 1099e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1100e48354ceSNicholas Bellinger 1101e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1102e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1103e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1104e48354ceSNicholas Bellinger } 1105e48354ceSNicholas Bellinger 1106e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1107e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1108e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1109e48354ceSNicholas Bellinger int use_misc) 1110e48354ceSNicholas Bellinger { 1111e48354ceSNicholas Bellinger int tx_sent, tx_size; 1112e48354ceSNicholas Bellinger u32 iov_count; 1113e48354ceSNicholas Bellinger struct kvec *iov; 1114e48354ceSNicholas Bellinger 1115e48354ceSNicholas Bellinger send_data: 1116e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1117e48354ceSNicholas Bellinger 1118e48354ceSNicholas Bellinger if (!use_misc) { 1119e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1120e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1121e48354ceSNicholas Bellinger } else { 1122e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1123e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1124e48354ceSNicholas Bellinger } 1125e48354ceSNicholas Bellinger 1126e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1127e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1128e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1129e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1130e48354ceSNicholas Bellinger goto send_data; 1131e48354ceSNicholas Bellinger } else 1132e48354ceSNicholas Bellinger return -1; 1133e48354ceSNicholas Bellinger } 1134e48354ceSNicholas Bellinger cmd->tx_size = 0; 1135e48354ceSNicholas Bellinger 1136e48354ceSNicholas Bellinger return 0; 1137e48354ceSNicholas Bellinger } 1138e48354ceSNicholas Bellinger 1139e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1140e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1141e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1142e48354ceSNicholas Bellinger { 1143e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1144e48354ceSNicholas Bellinger struct kvec iov; 1145e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1146e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 114740b05497SNicholas Bellinger int tx_sent, iov_off; 1148e48354ceSNicholas Bellinger 1149e48354ceSNicholas Bellinger send_hdr: 1150e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1151e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1152e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1153e48354ceSNicholas Bellinger 1154e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1155e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1156e48354ceSNicholas Bellinger 1157e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1158e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1159e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1160e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1161e48354ceSNicholas Bellinger goto send_hdr; 1162e48354ceSNicholas Bellinger } 1163e48354ceSNicholas Bellinger return -1; 1164e48354ceSNicholas Bellinger } 1165e48354ceSNicholas Bellinger 1166e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 116740b05497SNicholas Bellinger /* 116840b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 116940b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 117040b05497SNicholas Bellinger */ 117140b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1172e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 117340b05497SNicholas Bellinger if (cmd->padding) 117440b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 117540b05497SNicholas Bellinger else 117640b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 117740b05497SNicholas Bellinger } else { 117840b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 117940b05497SNicholas Bellinger } 1180e48354ceSNicholas Bellinger /* 1181e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1182e48354ceSNicholas Bellinger */ 1183e48354ceSNicholas Bellinger while (data_len) { 1184e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1185e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1186e48354ceSNicholas Bellinger send_pg: 1187e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1188e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1189e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1190e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1191e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1192e48354ceSNicholas Bellinger " -EAGAIN\n"); 1193e48354ceSNicholas Bellinger goto send_pg; 1194e48354ceSNicholas Bellinger } 1195e48354ceSNicholas Bellinger 1196e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1197e48354ceSNicholas Bellinger tx_sent); 1198e48354ceSNicholas Bellinger return -1; 1199e48354ceSNicholas Bellinger } 1200e48354ceSNicholas Bellinger 1201e48354ceSNicholas Bellinger data_len -= sub_len; 1202e48354ceSNicholas Bellinger offset = 0; 1203e48354ceSNicholas Bellinger sg = sg_next(sg); 1204e48354ceSNicholas Bellinger } 1205e48354ceSNicholas Bellinger 1206e48354ceSNicholas Bellinger send_padding: 1207e48354ceSNicholas Bellinger if (cmd->padding) { 120840b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1209e48354ceSNicholas Bellinger 1210e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1211e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1212e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1213e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1214e48354ceSNicholas Bellinger goto send_padding; 1215e48354ceSNicholas Bellinger } 1216e48354ceSNicholas Bellinger return -1; 1217e48354ceSNicholas Bellinger } 1218e48354ceSNicholas Bellinger } 1219e48354ceSNicholas Bellinger 1220e48354ceSNicholas Bellinger send_datacrc: 1221e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 122240b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1223e48354ceSNicholas Bellinger 1224e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1225e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1226e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1227e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1228e48354ceSNicholas Bellinger goto send_datacrc; 1229e48354ceSNicholas Bellinger } 1230e48354ceSNicholas Bellinger return -1; 1231e48354ceSNicholas Bellinger } 1232e48354ceSNicholas Bellinger } 1233e48354ceSNicholas Bellinger 1234e48354ceSNicholas Bellinger return 0; 1235e48354ceSNicholas Bellinger } 1236e48354ceSNicholas Bellinger 1237e48354ceSNicholas Bellinger /* 1238e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1239e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1240e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1241e48354ceSNicholas Bellinger * 1242e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1243e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1244e48354ceSNicholas Bellinger */ 1245e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1246e48354ceSNicholas Bellinger { 1247e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1248baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1249e48354ceSNicholas Bellinger 1250baa4d64bSNicholas Bellinger login->login_failed = 1; 1251e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1252e48354ceSNicholas Bellinger 1253baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1254e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1255e48354ceSNicholas Bellinger hdr->status_class = status_class; 1256e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 125766c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1258e48354ceSNicholas Bellinger 1259baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1260e48354ceSNicholas Bellinger } 1261e48354ceSNicholas Bellinger 1262e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1263e48354ceSNicholas Bellinger { 1264e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1265e48354ceSNicholas Bellinger 1266e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1267e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1268e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1269e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1270e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1271e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1272e48354ceSNicholas Bellinger 1273e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1274e48354ceSNicholas Bellinger } 1275e48354ceSNicholas Bellinger 1276e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1277e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1278e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1279e48354ceSNicholas Bellinger { 1280e48354ceSNicholas Bellinger int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; 12812ff017f5SNicholas Bellinger struct kvec *iov_p; 1282e48354ceSNicholas Bellinger struct msghdr msg; 1283e48354ceSNicholas Bellinger 1284e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1285e48354ceSNicholas Bellinger return -1; 1286e48354ceSNicholas Bellinger 1287e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1288e48354ceSNicholas Bellinger 1289e48354ceSNicholas Bellinger iov_p = count->iov; 1290e48354ceSNicholas Bellinger iov_len = count->iov_count; 1291e48354ceSNicholas Bellinger 1292e48354ceSNicholas Bellinger while (total_rx < data) { 1293e48354ceSNicholas Bellinger rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, 1294e48354ceSNicholas Bellinger (data - total_rx), 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 static int iscsit_do_tx_data( 1309e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1310e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1311e48354ceSNicholas Bellinger { 1312e48354ceSNicholas Bellinger int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; 13132ff017f5SNicholas Bellinger struct kvec *iov_p; 1314e48354ceSNicholas Bellinger struct msghdr msg; 1315e48354ceSNicholas Bellinger 1316e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1317e48354ceSNicholas Bellinger return -1; 1318e48354ceSNicholas Bellinger 1319e48354ceSNicholas Bellinger if (data <= 0) { 1320e48354ceSNicholas Bellinger pr_err("Data length is: %d\n", data); 1321e48354ceSNicholas Bellinger return -1; 1322e48354ceSNicholas Bellinger } 1323e48354ceSNicholas Bellinger 1324e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1325e48354ceSNicholas Bellinger 1326e48354ceSNicholas Bellinger iov_p = count->iov; 1327e48354ceSNicholas Bellinger iov_len = count->iov_count; 1328e48354ceSNicholas Bellinger 1329e48354ceSNicholas Bellinger while (total_tx < data) { 1330e48354ceSNicholas Bellinger tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, 1331e48354ceSNicholas Bellinger (data - total_tx)); 1332e48354ceSNicholas Bellinger if (tx_loop <= 0) { 1333e48354ceSNicholas Bellinger pr_debug("tx_loop: %d total_tx %d\n", 1334e48354ceSNicholas Bellinger tx_loop, total_tx); 1335e48354ceSNicholas Bellinger return tx_loop; 1336e48354ceSNicholas Bellinger } 1337e48354ceSNicholas Bellinger total_tx += tx_loop; 1338e48354ceSNicholas Bellinger pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1339e48354ceSNicholas Bellinger tx_loop, total_tx, data); 1340e48354ceSNicholas Bellinger } 1341e48354ceSNicholas Bellinger 1342e48354ceSNicholas Bellinger return total_tx; 1343e48354ceSNicholas Bellinger } 1344e48354ceSNicholas Bellinger 1345e48354ceSNicholas Bellinger int rx_data( 1346e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1347e48354ceSNicholas Bellinger struct kvec *iov, 1348e48354ceSNicholas Bellinger int iov_count, 1349e48354ceSNicholas Bellinger int data) 1350e48354ceSNicholas Bellinger { 1351e48354ceSNicholas Bellinger struct iscsi_data_count c; 1352e48354ceSNicholas Bellinger 1353e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1354e48354ceSNicholas Bellinger return -1; 1355e48354ceSNicholas Bellinger 1356e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1357e48354ceSNicholas Bellinger c.iov = iov; 1358e48354ceSNicholas Bellinger c.iov_count = iov_count; 1359e48354ceSNicholas Bellinger c.data_length = data; 1360e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1361e48354ceSNicholas Bellinger 1362e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1363e48354ceSNicholas Bellinger } 1364e48354ceSNicholas Bellinger 1365e48354ceSNicholas Bellinger int tx_data( 1366e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1367e48354ceSNicholas Bellinger struct kvec *iov, 1368e48354ceSNicholas Bellinger int iov_count, 1369e48354ceSNicholas Bellinger int data) 1370e48354ceSNicholas Bellinger { 1371e48354ceSNicholas Bellinger struct iscsi_data_count c; 1372e48354ceSNicholas Bellinger 1373e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1374e48354ceSNicholas Bellinger return -1; 1375e48354ceSNicholas Bellinger 1376e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1377e48354ceSNicholas Bellinger c.iov = iov; 1378e48354ceSNicholas Bellinger c.iov_count = iov_count; 1379e48354ceSNicholas Bellinger c.data_length = data; 1380e48354ceSNicholas Bellinger c.type = ISCSI_TX_DATA; 1381e48354ceSNicholas Bellinger 1382e48354ceSNicholas Bellinger return iscsit_do_tx_data(conn, &c); 1383e48354ceSNicholas Bellinger } 1384e48354ceSNicholas Bellinger 1385e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1386e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1387e48354ceSNicholas Bellinger u8 status_class, 1388e48354ceSNicholas Bellinger u8 status_detail) 1389e48354ceSNicholas Bellinger { 1390e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1391e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1392e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1393e48354ceSNicholas Bellinger 1394e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1395e48354ceSNicholas Bellinger if (!tiqn) 1396e48354ceSNicholas Bellinger return; 1397e48354ceSNicholas Bellinger 1398e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1399e48354ceSNicholas Bellinger 1400e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1401e48354ceSNicholas Bellinger if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && 1402e48354ceSNicholas Bellinger ((get_jiffies_64() - ls->last_fail_time) < 10)) { 1403e48354ceSNicholas Bellinger /* We already have the failure info for this login */ 1404e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1405e48354ceSNicholas Bellinger return; 1406e48354ceSNicholas Bellinger } 1407e48354ceSNicholas Bellinger 1408e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1409e48354ceSNicholas Bellinger ls->accepts++; 1410e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1411e48354ceSNicholas Bellinger ls->redirects++; 1412e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1413e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1414e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1415e48354ceSNicholas Bellinger ls->authenticate_fails++; 1416e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1417e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1418e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1419e48354ceSNicholas Bellinger ls->authorize_fails++; 1420e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1421e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1422e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1423e48354ceSNicholas Bellinger ls->negotiate_fails++; 1424e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1425e48354ceSNicholas Bellinger } else { 1426e48354ceSNicholas Bellinger ls->other_fails++; 1427e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1428e48354ceSNicholas Bellinger } 1429e48354ceSNicholas Bellinger 1430e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1431e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1432e48354ceSNicholas Bellinger if (conn->param_list) 1433e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1434e48354ceSNicholas Bellinger conn->param_list); 1435e48354ceSNicholas Bellinger strcpy(ls->last_intr_fail_name, 1436e48354ceSNicholas Bellinger (intrname ? intrname->value : "Unknown")); 1437e48354ceSNicholas Bellinger 1438baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1439baa4d64bSNicholas Bellinger 1440e48354ceSNicholas Bellinger snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, 1441e48354ceSNicholas Bellinger "%s", conn->login_ip); 1442e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1443e48354ceSNicholas Bellinger } 1444e48354ceSNicholas Bellinger 1445e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1446e48354ceSNicholas Bellinger } 1447e48354ceSNicholas Bellinger 1448e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1449e48354ceSNicholas Bellinger { 1450e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1451e48354ceSNicholas Bellinger 1452e48354ceSNicholas Bellinger if (!conn || !conn->sess) 1453e48354ceSNicholas Bellinger return NULL; 1454e48354ceSNicholas Bellinger 1455e48354ceSNicholas Bellinger tpg = conn->sess->tpg; 1456e48354ceSNicholas Bellinger if (!tpg) 1457e48354ceSNicholas Bellinger return NULL; 1458e48354ceSNicholas Bellinger 1459e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1460e48354ceSNicholas Bellinger return NULL; 1461e48354ceSNicholas Bellinger 1462e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1463e48354ceSNicholas Bellinger } 1464