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 } 3203e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 321e48354ceSNicholas Bellinger 322e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 323e48354ceSNicholas Bellinger { 324e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 325e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 326e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 327e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 328e48354ceSNicholas Bellinger 329e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 330e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 331e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 332e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 333e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 334e48354ceSNicholas Bellinger return -1; 335e48354ceSNicholas Bellinger } 336e48354ceSNicholas Bellinger 337e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 338e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 339e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 340e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 341e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 342e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 343e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 344e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 345e48354ceSNicholas Bellinger return -1; 346e48354ceSNicholas Bellinger } 347e48354ceSNicholas Bellinger 348e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 349e48354ceSNicholas Bellinger return 0; 350e48354ceSNicholas Bellinger 351ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 352e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 353e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 354e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 355e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 356e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 357e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 358ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 359e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 360e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 361e48354ceSNicholas Bellinger return -1; 362e48354ceSNicholas Bellinger } 363e48354ceSNicholas Bellinger return 0; 364e48354ceSNicholas Bellinger } 365e48354ceSNicholas Bellinger 366e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 367e48354ceSNicholas Bellinger struct iscsi_conn *conn, 36866c7db68SChristoph Hellwig itt_t init_task_tag) 369e48354ceSNicholas Bellinger { 370e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 371e48354ceSNicholas Bellinger 372e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3732fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 374e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 375e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 376e48354ceSNicholas Bellinger return cmd; 377e48354ceSNicholas Bellinger } 378e48354ceSNicholas Bellinger } 379e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 380e48354ceSNicholas Bellinger 381e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 382e48354ceSNicholas Bellinger init_task_tag, conn->cid); 383e48354ceSNicholas Bellinger return NULL; 384e48354ceSNicholas Bellinger } 385e48354ceSNicholas Bellinger 386e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 387e48354ceSNicholas Bellinger struct iscsi_conn *conn, 38866c7db68SChristoph Hellwig itt_t init_task_tag, 389e48354ceSNicholas Bellinger u32 length) 390e48354ceSNicholas Bellinger { 391e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 392e48354ceSNicholas Bellinger 393e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3942fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 395e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 396e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 397e48354ceSNicholas Bellinger return cmd; 398e48354ceSNicholas Bellinger } 399e48354ceSNicholas Bellinger } 400e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 401e48354ceSNicholas Bellinger 402e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 403e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 404e48354ceSNicholas Bellinger if (length) 405e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 406e48354ceSNicholas Bellinger 407e48354ceSNicholas Bellinger return NULL; 408e48354ceSNicholas Bellinger } 409e48354ceSNicholas Bellinger 410e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 411e48354ceSNicholas Bellinger struct iscsi_conn *conn, 412e48354ceSNicholas Bellinger u32 targ_xfer_tag) 413e48354ceSNicholas Bellinger { 414e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 415e48354ceSNicholas Bellinger 416e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4172fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 418e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 419e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 420e48354ceSNicholas Bellinger return cmd; 421e48354ceSNicholas Bellinger } 422e48354ceSNicholas Bellinger } 423e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 424e48354ceSNicholas Bellinger 425e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 426e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 427e48354ceSNicholas Bellinger return NULL; 428e48354ceSNicholas Bellinger } 429e48354ceSNicholas Bellinger 430e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 431e48354ceSNicholas Bellinger struct iscsi_session *sess, 432e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 433e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 43466c7db68SChristoph Hellwig itt_t init_task_tag) 435e48354ceSNicholas Bellinger { 436e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 437e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 438e48354ceSNicholas Bellinger /* 439e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 440e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 441e48354ceSNicholas Bellinger */ 442e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 443e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 444e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4452fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 446e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 447e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 448e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 449e48354ceSNicholas Bellinger 450e48354ceSNicholas Bellinger *cr_ptr = cr; 451e48354ceSNicholas Bellinger *cmd_ptr = cmd; 452e48354ceSNicholas Bellinger return -2; 453e48354ceSNicholas Bellinger } 454e48354ceSNicholas Bellinger } 455e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 456e48354ceSNicholas Bellinger } 457e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 458e48354ceSNicholas Bellinger /* 459e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 460e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 461e48354ceSNicholas Bellinger */ 462e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 463e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 464e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4652fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 466e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 467e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 468e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 469e48354ceSNicholas Bellinger 470e48354ceSNicholas Bellinger *cr_ptr = cr; 471e48354ceSNicholas Bellinger *cmd_ptr = cmd; 472e48354ceSNicholas Bellinger return 0; 473e48354ceSNicholas Bellinger } 474e48354ceSNicholas Bellinger } 475e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 476e48354ceSNicholas Bellinger } 477e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 478e48354ceSNicholas Bellinger 479e48354ceSNicholas Bellinger return -1; 480e48354ceSNicholas Bellinger } 481e48354ceSNicholas Bellinger 482e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 483e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 484e48354ceSNicholas Bellinger struct iscsi_conn *conn, 485e48354ceSNicholas Bellinger u8 state) 486e48354ceSNicholas Bellinger { 487e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 488e48354ceSNicholas Bellinger 489e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 490e48354ceSNicholas Bellinger if (!qr) { 491e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 492e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 493e48354ceSNicholas Bellinger return; 494e48354ceSNicholas Bellinger } 495e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 496e48354ceSNicholas Bellinger qr->cmd = cmd; 497e48354ceSNicholas Bellinger qr->state = state; 498e48354ceSNicholas Bellinger 499e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 500e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 501e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 502e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 503e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 504e48354ceSNicholas Bellinger 505d5627acbSRoland Dreier wake_up(&conn->queues_wq); 506e48354ceSNicholas Bellinger } 507e48354ceSNicholas Bellinger 508e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 509e48354ceSNicholas Bellinger { 510e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 511e48354ceSNicholas Bellinger 512e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 513e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 514e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 515e48354ceSNicholas Bellinger return NULL; 516e48354ceSNicholas Bellinger } 5171f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5181f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 519e48354ceSNicholas Bellinger 520e48354ceSNicholas Bellinger list_del(&qr->qr_list); 521e48354ceSNicholas Bellinger if (qr->cmd) 522e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 523e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 524e48354ceSNicholas Bellinger 525e48354ceSNicholas Bellinger return qr; 526e48354ceSNicholas Bellinger } 527e48354ceSNicholas Bellinger 528e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 529e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 530e48354ceSNicholas Bellinger struct iscsi_conn *conn) 531e48354ceSNicholas Bellinger { 532e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 533e48354ceSNicholas Bellinger 534e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 535e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 536e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 537e48354ceSNicholas Bellinger return; 538e48354ceSNicholas Bellinger } 539e48354ceSNicholas Bellinger 540e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 541e48354ceSNicholas Bellinger if (qr->cmd != cmd) 542e48354ceSNicholas Bellinger continue; 543e48354ceSNicholas Bellinger 544e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 545e48354ceSNicholas Bellinger list_del(&qr->qr_list); 546e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 547e48354ceSNicholas Bellinger } 548e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 549e48354ceSNicholas Bellinger 550e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 551e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 552e48354ceSNicholas Bellinger cmd->init_task_tag, 553e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 554e48354ceSNicholas Bellinger } 555e48354ceSNicholas Bellinger } 556e48354ceSNicholas Bellinger 557e48354ceSNicholas Bellinger void iscsit_add_cmd_to_response_queue( 558e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 559e48354ceSNicholas Bellinger struct iscsi_conn *conn, 560e48354ceSNicholas Bellinger u8 state) 561e48354ceSNicholas Bellinger { 562e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 563e48354ceSNicholas Bellinger 564e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 565e48354ceSNicholas Bellinger if (!qr) { 566e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 567e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 568e48354ceSNicholas Bellinger return; 569e48354ceSNicholas Bellinger } 570e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 571e48354ceSNicholas Bellinger qr->cmd = cmd; 572e48354ceSNicholas Bellinger qr->state = state; 573e48354ceSNicholas Bellinger 574e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 575e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 576e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 577e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 578e48354ceSNicholas Bellinger 579d5627acbSRoland Dreier wake_up(&conn->queues_wq); 580e48354ceSNicholas Bellinger } 581e48354ceSNicholas Bellinger 582e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 583e48354ceSNicholas Bellinger { 584e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 585e48354ceSNicholas Bellinger 586e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 587e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 588e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 589e48354ceSNicholas Bellinger return NULL; 590e48354ceSNicholas Bellinger } 591e48354ceSNicholas Bellinger 5921f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 5931f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 594e48354ceSNicholas Bellinger 595e48354ceSNicholas Bellinger list_del(&qr->qr_list); 596e48354ceSNicholas Bellinger if (qr->cmd) 597e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 598e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 599e48354ceSNicholas Bellinger 600e48354ceSNicholas Bellinger return qr; 601e48354ceSNicholas Bellinger } 602e48354ceSNicholas Bellinger 603e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 604e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 605e48354ceSNicholas Bellinger struct iscsi_conn *conn) 606e48354ceSNicholas Bellinger { 607e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 608e48354ceSNicholas Bellinger 609e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 610e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 611e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 612e48354ceSNicholas Bellinger return; 613e48354ceSNicholas Bellinger } 614e48354ceSNicholas Bellinger 615e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 616e48354ceSNicholas Bellinger qr_list) { 617e48354ceSNicholas Bellinger if (qr->cmd != cmd) 618e48354ceSNicholas Bellinger continue; 619e48354ceSNicholas Bellinger 620e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 621e48354ceSNicholas Bellinger list_del(&qr->qr_list); 622e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 623e48354ceSNicholas Bellinger } 624e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 625e48354ceSNicholas Bellinger 626e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 627e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 628e48354ceSNicholas Bellinger cmd->init_task_tag, 629e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 630e48354ceSNicholas Bellinger } 631e48354ceSNicholas Bellinger } 632e48354ceSNicholas Bellinger 633d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 634d5627acbSRoland Dreier { 635d5627acbSRoland Dreier bool empty; 636d5627acbSRoland Dreier 637d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 638d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 639d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 640d5627acbSRoland Dreier 641d5627acbSRoland Dreier if (!empty) 642d5627acbSRoland Dreier return empty; 643d5627acbSRoland Dreier 644d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 645d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 646d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 647d5627acbSRoland Dreier 648d5627acbSRoland Dreier return empty; 649d5627acbSRoland Dreier } 650d5627acbSRoland Dreier 651e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 652e48354ceSNicholas Bellinger { 653e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 654e48354ceSNicholas Bellinger 655e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 656e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 657e48354ceSNicholas Bellinger list_del(&qr->qr_list); 658e48354ceSNicholas Bellinger if (qr->cmd) 659e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 660e48354ceSNicholas Bellinger 661e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 662e48354ceSNicholas Bellinger } 663e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 664e48354ceSNicholas Bellinger 665e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 666e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 667e48354ceSNicholas Bellinger qr_list) { 668e48354ceSNicholas Bellinger list_del(&qr->qr_list); 669e48354ceSNicholas Bellinger if (qr->cmd) 670e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 671e48354ceSNicholas Bellinger 672e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 673e48354ceSNicholas Bellinger } 674e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 675e48354ceSNicholas Bellinger } 676e48354ceSNicholas Bellinger 677e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 678e48354ceSNicholas Bellinger { 679e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 680e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 681e48354ceSNicholas Bellinger kfree(cmd->seq_list); 682e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 683e48354ceSNicholas Bellinger kfree(cmd->iov_data); 6849864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 685e48354ceSNicholas Bellinger 686e48354ceSNicholas Bellinger kmem_cache_free(lio_cmd_cache, cmd); 687e48354ceSNicholas Bellinger } 688e48354ceSNicholas Bellinger 689aafc9d15SNicholas Bellinger static void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, 690aafc9d15SNicholas Bellinger bool check_queues) 691d270190aSNicholas Bellinger { 692aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 693aafc9d15SNicholas Bellinger 694aafc9d15SNicholas Bellinger if (scsi_cmd) { 695aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 696aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 697aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 698aafc9d15SNicholas Bellinger } 699aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 700aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 701aafc9d15SNicholas Bellinger } 702aafc9d15SNicholas Bellinger 703aafc9d15SNicholas Bellinger if (conn && check_queues) { 704aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 705aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 706aafc9d15SNicholas Bellinger } 707aafc9d15SNicholas Bellinger } 708aafc9d15SNicholas Bellinger 709aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 710aafc9d15SNicholas Bellinger { 711aafc9d15SNicholas Bellinger struct se_cmd *se_cmd = NULL; 712aafc9d15SNicholas Bellinger int rc; 713d270190aSNicholas Bellinger /* 71420879696SMasanari Iida * Determine if a struct se_cmd is associated with 715d270190aSNicholas Bellinger * this struct iscsi_cmd. 716d270190aSNicholas Bellinger */ 717d270190aSNicholas Bellinger switch (cmd->iscsi_opcode) { 718d270190aSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 719aafc9d15SNicholas Bellinger se_cmd = &cmd->se_cmd; 720aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 721cdb72665SNicholas Bellinger /* 722cdb72665SNicholas Bellinger * Fallthrough 723cdb72665SNicholas Bellinger */ 724d270190aSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 725aafc9d15SNicholas Bellinger rc = transport_generic_free_cmd(&cmd->se_cmd, 1); 726aafc9d15SNicholas Bellinger if (!rc && shutdown && se_cmd && se_cmd->se_sess) { 727aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 728aafc9d15SNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 729aafc9d15SNicholas Bellinger } 730d270190aSNicholas Bellinger break; 731c1ce4bd5SNicholas Bellinger case ISCSI_OP_REJECT: 732c1ce4bd5SNicholas Bellinger /* 733c1ce4bd5SNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 734c1ce4bd5SNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 735c1ce4bd5SNicholas Bellinger * associated cmd->se_cmd needs to be released. 736c1ce4bd5SNicholas Bellinger */ 737c1ce4bd5SNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 738aafc9d15SNicholas Bellinger se_cmd = &cmd->se_cmd; 739aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 740aafc9d15SNicholas Bellinger 741aafc9d15SNicholas Bellinger rc = transport_generic_free_cmd(&cmd->se_cmd, 1); 742aafc9d15SNicholas Bellinger if (!rc && shutdown && se_cmd->se_sess) { 743aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 744aafc9d15SNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 745aafc9d15SNicholas Bellinger } 746c1ce4bd5SNicholas Bellinger break; 747c1ce4bd5SNicholas Bellinger } 748c1ce4bd5SNicholas Bellinger /* Fall-through */ 749d270190aSNicholas Bellinger default: 750aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, false, shutdown); 751cdb72665SNicholas Bellinger cmd->release_cmd(cmd); 752d270190aSNicholas Bellinger break; 753d270190aSNicholas Bellinger } 754d270190aSNicholas Bellinger } 755d270190aSNicholas Bellinger 756e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 757e48354ceSNicholas Bellinger { 758e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 759e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 760e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 761e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 762e48354ceSNicholas Bellinger if (in_interrupt()) 763e48354ceSNicholas Bellinger return 2; 764e48354ceSNicholas Bellinger 765e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 766e48354ceSNicholas Bellinger return 1; 767e48354ceSNicholas Bellinger } 768e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 769e48354ceSNicholas Bellinger 770e48354ceSNicholas Bellinger return 0; 771e48354ceSNicholas Bellinger } 772e48354ceSNicholas Bellinger 773e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 774e48354ceSNicholas Bellinger { 775e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 776e48354ceSNicholas Bellinger sess->session_usage_count--; 777e48354ceSNicholas Bellinger 778e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 779e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 780e48354ceSNicholas Bellinger 781e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 782e48354ceSNicholas Bellinger } 783e48354ceSNicholas Bellinger 784e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 785e48354ceSNicholas Bellinger { 786e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 787e48354ceSNicholas Bellinger sess->session_usage_count++; 788e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 789e48354ceSNicholas Bellinger } 790e48354ceSNicholas Bellinger 791e48354ceSNicholas Bellinger /* 792e48354ceSNicholas Bellinger * Setup conn->if_marker and conn->of_marker values based upon 793e48354ceSNicholas Bellinger * the initial marker-less interval. (see iSCSI v19 A.2) 794e48354ceSNicholas Bellinger */ 795e48354ceSNicholas Bellinger int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) 796e48354ceSNicholas Bellinger { 797e48354ceSNicholas Bellinger int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; 798e48354ceSNicholas Bellinger /* 799e48354ceSNicholas Bellinger * IFMarkInt and OFMarkInt are negotiated as 32-bit words. 800e48354ceSNicholas Bellinger */ 801e48354ceSNicholas Bellinger u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); 802e48354ceSNicholas Bellinger u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); 803e48354ceSNicholas Bellinger 804e48354ceSNicholas Bellinger if (conn->conn_ops->OFMarker) { 805e48354ceSNicholas Bellinger /* 806e48354ceSNicholas Bellinger * Account for the first Login Command received not 807e48354ceSNicholas Bellinger * via iscsi_recv_msg(). 808e48354ceSNicholas Bellinger */ 809e48354ceSNicholas Bellinger conn->of_marker += ISCSI_HDR_LEN; 810e48354ceSNicholas Bellinger if (conn->of_marker <= OFMarkInt) { 811e48354ceSNicholas Bellinger conn->of_marker = (OFMarkInt - conn->of_marker); 812e48354ceSNicholas Bellinger } else { 813e48354ceSNicholas Bellinger login_ofmarker_count = (conn->of_marker / OFMarkInt); 814e48354ceSNicholas Bellinger next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + 815e48354ceSNicholas Bellinger (login_ofmarker_count * MARKER_SIZE); 816e48354ceSNicholas Bellinger conn->of_marker = (next_marker - conn->of_marker); 817e48354ceSNicholas Bellinger } 818e48354ceSNicholas Bellinger conn->of_marker_offset = 0; 819e48354ceSNicholas Bellinger pr_debug("Setting OFMarker value to %u based on Initial" 820e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->of_marker); 821e48354ceSNicholas Bellinger } 822e48354ceSNicholas Bellinger 823e48354ceSNicholas Bellinger if (conn->conn_ops->IFMarker) { 824e48354ceSNicholas Bellinger if (conn->if_marker <= IFMarkInt) { 825e48354ceSNicholas Bellinger conn->if_marker = (IFMarkInt - conn->if_marker); 826e48354ceSNicholas Bellinger } else { 827e48354ceSNicholas Bellinger login_ifmarker_count = (conn->if_marker / IFMarkInt); 828e48354ceSNicholas Bellinger next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + 829e48354ceSNicholas Bellinger (login_ifmarker_count * MARKER_SIZE); 830e48354ceSNicholas Bellinger conn->if_marker = (next_marker - conn->if_marker); 831e48354ceSNicholas Bellinger } 832e48354ceSNicholas Bellinger pr_debug("Setting IFMarker value to %u based on Initial" 833e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->if_marker); 834e48354ceSNicholas Bellinger } 835e48354ceSNicholas Bellinger 836e48354ceSNicholas Bellinger return 0; 837e48354ceSNicholas Bellinger } 838e48354ceSNicholas Bellinger 839e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 840e48354ceSNicholas Bellinger { 841e48354ceSNicholas Bellinger struct iscsi_conn *conn; 842e48354ceSNicholas Bellinger 843e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 844e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 845e48354ceSNicholas Bellinger if ((conn->cid == cid) && 846e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 847e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 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 struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 858e48354ceSNicholas Bellinger { 859e48354ceSNicholas Bellinger struct iscsi_conn *conn; 860e48354ceSNicholas Bellinger 861e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 862e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 863e48354ceSNicholas Bellinger if (conn->cid == cid) { 864e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 865e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 866e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 867e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 868e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 869e48354ceSNicholas Bellinger return conn; 870e48354ceSNicholas Bellinger } 871e48354ceSNicholas Bellinger } 872e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 873e48354ceSNicholas Bellinger 874e48354ceSNicholas Bellinger return NULL; 875e48354ceSNicholas Bellinger } 876e48354ceSNicholas Bellinger 877e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 878e48354ceSNicholas Bellinger { 879e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 880e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 881e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 882e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 883e48354ceSNicholas Bellinger 884e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 885e48354ceSNicholas Bellinger return; 886e48354ceSNicholas Bellinger } 887e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 888e48354ceSNicholas Bellinger } 889e48354ceSNicholas Bellinger 890e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 891e48354ceSNicholas Bellinger { 892e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 893e48354ceSNicholas Bellinger conn->conn_usage_count--; 894e48354ceSNicholas Bellinger 895e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 896e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 897e48354ceSNicholas Bellinger 898e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 899e48354ceSNicholas Bellinger } 900e48354ceSNicholas Bellinger 901e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 902e48354ceSNicholas Bellinger { 903e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 904e48354ceSNicholas Bellinger conn->conn_usage_count++; 905e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 906e48354ceSNicholas Bellinger } 907e48354ceSNicholas Bellinger 908e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 909e48354ceSNicholas Bellinger { 910e48354ceSNicholas Bellinger u8 state; 911e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 912e48354ceSNicholas Bellinger 913e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); 914e48354ceSNicholas Bellinger if (!cmd) 915e48354ceSNicholas Bellinger return -1; 916e48354ceSNicholas Bellinger 917e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 918e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 919e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 92066c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 921e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 922e48354ceSNicholas Bellinger cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : 923e48354ceSNicholas Bellinger 0xFFFFFFFF; 924e48354ceSNicholas Bellinger if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) 925e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 926e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 927e48354ceSNicholas Bellinger 928e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 9292fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 930e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 931e48354ceSNicholas Bellinger 932e48354ceSNicholas Bellinger if (want_response) 933e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 934e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 935e48354ceSNicholas Bellinger 936e48354ceSNicholas Bellinger return 0; 937e48354ceSNicholas Bellinger } 938e48354ceSNicholas Bellinger 939e48354ceSNicholas Bellinger static void iscsit_handle_nopin_response_timeout(unsigned long data) 940e48354ceSNicholas Bellinger { 941e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 942e48354ceSNicholas Bellinger 943e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 944e48354ceSNicholas Bellinger 945e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 946e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 947e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 948e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 949e48354ceSNicholas Bellinger return; 950e48354ceSNicholas Bellinger } 951e48354ceSNicholas Bellinger 952e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 953e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 954e48354ceSNicholas Bellinger conn->sess->sid); 955e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 956e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 957e48354ceSNicholas Bellinger 958e48354ceSNicholas Bellinger { 959e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 960e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 961e48354ceSNicholas Bellinger 962e48354ceSNicholas Bellinger if (tiqn) { 963e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 964e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9658359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 966e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 967e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 968e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 969e48354ceSNicholas Bellinger conn->sess->conn_timeout_errors++; 970e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 971e48354ceSNicholas Bellinger } 972e48354ceSNicholas Bellinger } 973e48354ceSNicholas Bellinger 974e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 975e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 976e48354ceSNicholas Bellinger } 977e48354ceSNicholas Bellinger 978e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 979e48354ceSNicholas Bellinger { 980e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 981e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 982e48354ceSNicholas Bellinger 983e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 984e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 985e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 986e48354ceSNicholas Bellinger return; 987e48354ceSNicholas Bellinger } 988e48354ceSNicholas Bellinger 989e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 990e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 991e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 992e48354ceSNicholas Bellinger } 993e48354ceSNicholas Bellinger 994e48354ceSNicholas Bellinger /* 995e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 996e48354ceSNicholas Bellinger */ 997e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 998e48354ceSNicholas Bellinger { 999e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1000e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1001e48354ceSNicholas Bellinger 1002e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1003e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 1004e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1005e48354ceSNicholas Bellinger return; 1006e48354ceSNicholas Bellinger } 1007e48354ceSNicholas Bellinger 1008e48354ceSNicholas Bellinger init_timer(&conn->nopin_response_timer); 1009e48354ceSNicholas Bellinger conn->nopin_response_timer.expires = 1010e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ); 1011e48354ceSNicholas Bellinger conn->nopin_response_timer.data = (unsigned long)conn; 1012e48354ceSNicholas Bellinger conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 1013e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 1014e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 1015e48354ceSNicholas Bellinger add_timer(&conn->nopin_response_timer); 1016e48354ceSNicholas Bellinger 1017e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 1018e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 1019e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1020e48354ceSNicholas Bellinger } 1021e48354ceSNicholas Bellinger 1022e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 1023e48354ceSNicholas Bellinger { 1024e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1025e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1026e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1027e48354ceSNicholas Bellinger return; 1028e48354ceSNicholas Bellinger } 1029e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1030e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1031e48354ceSNicholas Bellinger 1032e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 1033e48354ceSNicholas Bellinger 1034e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1035e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1036e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1037e48354ceSNicholas Bellinger } 1038e48354ceSNicholas Bellinger 1039e48354ceSNicholas Bellinger static void iscsit_handle_nopin_timeout(unsigned long data) 1040e48354ceSNicholas Bellinger { 1041e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 1042e48354ceSNicholas Bellinger 1043e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1044e48354ceSNicholas Bellinger 1045e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1046e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1047e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1048e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1049e48354ceSNicholas Bellinger return; 1050e48354ceSNicholas Bellinger } 1051e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1052e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1053e48354ceSNicholas Bellinger 1054e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1055e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1056e48354ceSNicholas Bellinger } 1057e48354ceSNicholas Bellinger 1058e48354ceSNicholas Bellinger /* 1059e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 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 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1072e48354ceSNicholas Bellinger return; 1073e48354ceSNicholas Bellinger 1074e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1075e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1076e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1077e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1078e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1079e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1080e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1081e48354ceSNicholas Bellinger 1082e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1083e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1084e48354ceSNicholas Bellinger } 1085e48354ceSNicholas Bellinger 1086e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1087e48354ceSNicholas Bellinger { 1088e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1089e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1090e48354ceSNicholas Bellinger /* 1091e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1092e48354ceSNicholas Bellinger */ 1093e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1094e48354ceSNicholas Bellinger return; 1095e48354ceSNicholas Bellinger 1096e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1097e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1098e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1099e48354ceSNicholas Bellinger return; 1100e48354ceSNicholas Bellinger } 1101e48354ceSNicholas Bellinger 1102e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1103e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1104e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1105e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1106e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1107e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1108e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1109e48354ceSNicholas Bellinger 1110e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1111e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1112e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1113e48354ceSNicholas Bellinger } 1114e48354ceSNicholas Bellinger 1115e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1116e48354ceSNicholas Bellinger { 1117e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1118e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1119e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1120e48354ceSNicholas Bellinger return; 1121e48354ceSNicholas Bellinger } 1122e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1123e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1124e48354ceSNicholas Bellinger 1125e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1126e48354ceSNicholas Bellinger 1127e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1128e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1129e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1130e48354ceSNicholas Bellinger } 1131e48354ceSNicholas Bellinger 1132e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1133e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1134e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1135e48354ceSNicholas Bellinger int use_misc) 1136e48354ceSNicholas Bellinger { 1137e48354ceSNicholas Bellinger int tx_sent, tx_size; 1138e48354ceSNicholas Bellinger u32 iov_count; 1139e48354ceSNicholas Bellinger struct kvec *iov; 1140e48354ceSNicholas Bellinger 1141e48354ceSNicholas Bellinger send_data: 1142e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1143e48354ceSNicholas Bellinger 1144e48354ceSNicholas Bellinger if (!use_misc) { 1145e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1146e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1147e48354ceSNicholas Bellinger } else { 1148e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1149e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1150e48354ceSNicholas Bellinger } 1151e48354ceSNicholas Bellinger 1152e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1153e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1154e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1155e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1156e48354ceSNicholas Bellinger goto send_data; 1157e48354ceSNicholas Bellinger } else 1158e48354ceSNicholas Bellinger return -1; 1159e48354ceSNicholas Bellinger } 1160e48354ceSNicholas Bellinger cmd->tx_size = 0; 1161e48354ceSNicholas Bellinger 1162e48354ceSNicholas Bellinger return 0; 1163e48354ceSNicholas Bellinger } 1164e48354ceSNicholas Bellinger 1165e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1166e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1167e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1168e48354ceSNicholas Bellinger { 1169e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1170e48354ceSNicholas Bellinger struct kvec iov; 1171e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1172e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 117340b05497SNicholas Bellinger int tx_sent, iov_off; 1174e48354ceSNicholas Bellinger 1175e48354ceSNicholas Bellinger send_hdr: 1176e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1177e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1178e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1179e48354ceSNicholas Bellinger 1180e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1181e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1182e48354ceSNicholas Bellinger 1183e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1184e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1185e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1186e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1187e48354ceSNicholas Bellinger goto send_hdr; 1188e48354ceSNicholas Bellinger } 1189e48354ceSNicholas Bellinger return -1; 1190e48354ceSNicholas Bellinger } 1191e48354ceSNicholas Bellinger 1192e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 119340b05497SNicholas Bellinger /* 119440b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 119540b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 119640b05497SNicholas Bellinger */ 119740b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1198e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 119940b05497SNicholas Bellinger if (cmd->padding) 120040b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 120140b05497SNicholas Bellinger else 120240b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 120340b05497SNicholas Bellinger } else { 120440b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 120540b05497SNicholas Bellinger } 1206e48354ceSNicholas Bellinger /* 1207e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1208e48354ceSNicholas Bellinger */ 1209e48354ceSNicholas Bellinger while (data_len) { 1210e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1211e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1212e48354ceSNicholas Bellinger send_pg: 1213e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1214e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1215e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1216e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1217e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1218e48354ceSNicholas Bellinger " -EAGAIN\n"); 1219e48354ceSNicholas Bellinger goto send_pg; 1220e48354ceSNicholas Bellinger } 1221e48354ceSNicholas Bellinger 1222e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1223e48354ceSNicholas Bellinger tx_sent); 1224e48354ceSNicholas Bellinger return -1; 1225e48354ceSNicholas Bellinger } 1226e48354ceSNicholas Bellinger 1227e48354ceSNicholas Bellinger data_len -= sub_len; 1228e48354ceSNicholas Bellinger offset = 0; 1229e48354ceSNicholas Bellinger sg = sg_next(sg); 1230e48354ceSNicholas Bellinger } 1231e48354ceSNicholas Bellinger 1232e48354ceSNicholas Bellinger send_padding: 1233e48354ceSNicholas Bellinger if (cmd->padding) { 123440b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1235e48354ceSNicholas Bellinger 1236e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1237e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1238e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1239e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1240e48354ceSNicholas Bellinger goto send_padding; 1241e48354ceSNicholas Bellinger } 1242e48354ceSNicholas Bellinger return -1; 1243e48354ceSNicholas Bellinger } 1244e48354ceSNicholas Bellinger } 1245e48354ceSNicholas Bellinger 1246e48354ceSNicholas Bellinger send_datacrc: 1247e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 124840b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1249e48354ceSNicholas Bellinger 1250e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1251e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1252e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1253e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1254e48354ceSNicholas Bellinger goto send_datacrc; 1255e48354ceSNicholas Bellinger } 1256e48354ceSNicholas Bellinger return -1; 1257e48354ceSNicholas Bellinger } 1258e48354ceSNicholas Bellinger } 1259e48354ceSNicholas Bellinger 1260e48354ceSNicholas Bellinger return 0; 1261e48354ceSNicholas Bellinger } 1262e48354ceSNicholas Bellinger 1263e48354ceSNicholas Bellinger /* 1264e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1265e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1266e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1267e48354ceSNicholas Bellinger * 1268e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1269e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1270e48354ceSNicholas Bellinger */ 1271e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1272e48354ceSNicholas Bellinger { 1273e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1274baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1275e48354ceSNicholas Bellinger 1276baa4d64bSNicholas Bellinger login->login_failed = 1; 1277e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1278e48354ceSNicholas Bellinger 1279baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1280e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1281e48354ceSNicholas Bellinger hdr->status_class = status_class; 1282e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 128366c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1284e48354ceSNicholas Bellinger 1285baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1286e48354ceSNicholas Bellinger } 1287e48354ceSNicholas Bellinger 1288e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1289e48354ceSNicholas Bellinger { 1290e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1291e48354ceSNicholas Bellinger 1292e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1293e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1294e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1295e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1296e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1297e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1298e48354ceSNicholas Bellinger 1299e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1300e48354ceSNicholas Bellinger } 1301e48354ceSNicholas Bellinger 1302e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1303e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1304e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1305e48354ceSNicholas Bellinger { 1306e48354ceSNicholas Bellinger int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; 13072ff017f5SNicholas Bellinger struct kvec *iov_p; 1308e48354ceSNicholas Bellinger struct msghdr msg; 1309e48354ceSNicholas Bellinger 1310e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1311e48354ceSNicholas Bellinger return -1; 1312e48354ceSNicholas Bellinger 1313e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1314e48354ceSNicholas Bellinger 1315e48354ceSNicholas Bellinger iov_p = count->iov; 1316e48354ceSNicholas Bellinger iov_len = count->iov_count; 1317e48354ceSNicholas Bellinger 1318e48354ceSNicholas Bellinger while (total_rx < data) { 1319e48354ceSNicholas Bellinger rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, 1320e48354ceSNicholas Bellinger (data - total_rx), MSG_WAITALL); 1321e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1322e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1323e48354ceSNicholas Bellinger rx_loop, total_rx); 1324e48354ceSNicholas Bellinger return rx_loop; 1325e48354ceSNicholas Bellinger } 1326e48354ceSNicholas Bellinger total_rx += rx_loop; 1327e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1328e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1329e48354ceSNicholas Bellinger } 1330e48354ceSNicholas Bellinger 1331e48354ceSNicholas Bellinger return total_rx; 1332e48354ceSNicholas Bellinger } 1333e48354ceSNicholas Bellinger 1334e48354ceSNicholas Bellinger static int iscsit_do_tx_data( 1335e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1336e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1337e48354ceSNicholas Bellinger { 1338e48354ceSNicholas Bellinger int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; 13392ff017f5SNicholas Bellinger struct kvec *iov_p; 1340e48354ceSNicholas Bellinger struct msghdr msg; 1341e48354ceSNicholas Bellinger 1342e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1343e48354ceSNicholas Bellinger return -1; 1344e48354ceSNicholas Bellinger 1345e48354ceSNicholas Bellinger if (data <= 0) { 1346e48354ceSNicholas Bellinger pr_err("Data length is: %d\n", data); 1347e48354ceSNicholas Bellinger return -1; 1348e48354ceSNicholas Bellinger } 1349e48354ceSNicholas Bellinger 1350e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1351e48354ceSNicholas Bellinger 1352e48354ceSNicholas Bellinger iov_p = count->iov; 1353e48354ceSNicholas Bellinger iov_len = count->iov_count; 1354e48354ceSNicholas Bellinger 1355e48354ceSNicholas Bellinger while (total_tx < data) { 1356e48354ceSNicholas Bellinger tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, 1357e48354ceSNicholas Bellinger (data - total_tx)); 1358e48354ceSNicholas Bellinger if (tx_loop <= 0) { 1359e48354ceSNicholas Bellinger pr_debug("tx_loop: %d total_tx %d\n", 1360e48354ceSNicholas Bellinger tx_loop, total_tx); 1361e48354ceSNicholas Bellinger return tx_loop; 1362e48354ceSNicholas Bellinger } 1363e48354ceSNicholas Bellinger total_tx += tx_loop; 1364e48354ceSNicholas Bellinger pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1365e48354ceSNicholas Bellinger tx_loop, total_tx, data); 1366e48354ceSNicholas Bellinger } 1367e48354ceSNicholas Bellinger 1368e48354ceSNicholas Bellinger return total_tx; 1369e48354ceSNicholas Bellinger } 1370e48354ceSNicholas Bellinger 1371e48354ceSNicholas Bellinger int rx_data( 1372e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1373e48354ceSNicholas Bellinger struct kvec *iov, 1374e48354ceSNicholas Bellinger int iov_count, 1375e48354ceSNicholas Bellinger int data) 1376e48354ceSNicholas Bellinger { 1377e48354ceSNicholas Bellinger struct iscsi_data_count c; 1378e48354ceSNicholas Bellinger 1379e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1380e48354ceSNicholas Bellinger return -1; 1381e48354ceSNicholas Bellinger 1382e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1383e48354ceSNicholas Bellinger c.iov = iov; 1384e48354ceSNicholas Bellinger c.iov_count = iov_count; 1385e48354ceSNicholas Bellinger c.data_length = data; 1386e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1387e48354ceSNicholas Bellinger 1388e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1389e48354ceSNicholas Bellinger } 1390e48354ceSNicholas Bellinger 1391e48354ceSNicholas Bellinger int tx_data( 1392e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1393e48354ceSNicholas Bellinger struct kvec *iov, 1394e48354ceSNicholas Bellinger int iov_count, 1395e48354ceSNicholas Bellinger int data) 1396e48354ceSNicholas Bellinger { 1397e48354ceSNicholas Bellinger struct iscsi_data_count c; 1398e48354ceSNicholas Bellinger 1399e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1400e48354ceSNicholas Bellinger return -1; 1401e48354ceSNicholas Bellinger 1402e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1403e48354ceSNicholas Bellinger c.iov = iov; 1404e48354ceSNicholas Bellinger c.iov_count = iov_count; 1405e48354ceSNicholas Bellinger c.data_length = data; 1406e48354ceSNicholas Bellinger c.type = ISCSI_TX_DATA; 1407e48354ceSNicholas Bellinger 1408e48354ceSNicholas Bellinger return iscsit_do_tx_data(conn, &c); 1409e48354ceSNicholas Bellinger } 1410e48354ceSNicholas Bellinger 1411e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1412e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1413e48354ceSNicholas Bellinger u8 status_class, 1414e48354ceSNicholas Bellinger u8 status_detail) 1415e48354ceSNicholas Bellinger { 1416e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1417e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1418e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1419e48354ceSNicholas Bellinger 1420e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1421e48354ceSNicholas Bellinger if (!tiqn) 1422e48354ceSNicholas Bellinger return; 1423e48354ceSNicholas Bellinger 1424e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1425e48354ceSNicholas Bellinger 1426e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1427e48354ceSNicholas Bellinger if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && 1428e48354ceSNicholas Bellinger ((get_jiffies_64() - ls->last_fail_time) < 10)) { 1429e48354ceSNicholas Bellinger /* We already have the failure info for this login */ 1430e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1431e48354ceSNicholas Bellinger return; 1432e48354ceSNicholas Bellinger } 1433e48354ceSNicholas Bellinger 1434e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1435e48354ceSNicholas Bellinger ls->accepts++; 1436e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1437e48354ceSNicholas Bellinger ls->redirects++; 1438e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1439e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1440e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1441e48354ceSNicholas Bellinger ls->authenticate_fails++; 1442e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1443e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1444e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1445e48354ceSNicholas Bellinger ls->authorize_fails++; 1446e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1447e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1448e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1449e48354ceSNicholas Bellinger ls->negotiate_fails++; 1450e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1451e48354ceSNicholas Bellinger } else { 1452e48354ceSNicholas Bellinger ls->other_fails++; 1453e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1454e48354ceSNicholas Bellinger } 1455e48354ceSNicholas Bellinger 1456e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1457e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1458e48354ceSNicholas Bellinger if (conn->param_list) 1459e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1460e48354ceSNicholas Bellinger conn->param_list); 1461e48354ceSNicholas Bellinger strcpy(ls->last_intr_fail_name, 1462e48354ceSNicholas Bellinger (intrname ? intrname->value : "Unknown")); 1463e48354ceSNicholas Bellinger 1464baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1465baa4d64bSNicholas Bellinger 1466e48354ceSNicholas Bellinger snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, 1467e48354ceSNicholas Bellinger "%s", conn->login_ip); 1468e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1469e48354ceSNicholas Bellinger } 1470e48354ceSNicholas Bellinger 1471e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1472e48354ceSNicholas Bellinger } 1473e48354ceSNicholas Bellinger 1474e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1475e48354ceSNicholas Bellinger { 1476e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1477e48354ceSNicholas Bellinger 1478e48354ceSNicholas Bellinger if (!conn || !conn->sess) 1479e48354ceSNicholas Bellinger return NULL; 1480e48354ceSNicholas Bellinger 1481e48354ceSNicholas Bellinger tpg = conn->sess->tpg; 1482e48354ceSNicholas Bellinger if (!tpg) 1483e48354ceSNicholas Bellinger return NULL; 1484e48354ceSNicholas Bellinger 1485e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1486e48354ceSNicholas Bellinger return NULL; 1487e48354ceSNicholas Bellinger 1488e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1489e48354ceSNicholas Bellinger } 1490