1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the iSCSI Target specific utility functions. 3e48354ceSNicholas Bellinger * 44c76251eSNicholas Bellinger * (c) Copyright 2007-2013 Datera, Inc. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 9e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 10e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 11e48354ceSNicholas Bellinger * (at your option) any later version. 12e48354ceSNicholas Bellinger * 13e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 14e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 15e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16e48354ceSNicholas Bellinger * GNU General Public License for more details. 17e48354ceSNicholas Bellinger ******************************************************************************/ 18e48354ceSNicholas Bellinger 19e48354ceSNicholas Bellinger #include <linux/list.h> 20988e3a85SNicholas Bellinger #include <linux/percpu_ida.h> 21e48354ceSNicholas Bellinger #include <scsi/scsi_tcq.h> 22e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 23e48354ceSNicholas Bellinger #include <target/target_core_base.h> 24c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 25e48354ceSNicholas Bellinger #include <target/target_core_configfs.h> 26baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 27e48354ceSNicholas Bellinger 2867f091f2SSagi Grimberg #include <target/iscsi/iscsi_target_core.h> 29e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 30e48354ceSNicholas Bellinger #include "iscsi_target_seq_pdu_list.h" 31e48354ceSNicholas Bellinger #include "iscsi_target_datain_values.h" 32e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 33e48354ceSNicholas Bellinger #include "iscsi_target_erl1.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_tq.h" 37e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 38e48354ceSNicholas Bellinger #include "iscsi_target.h" 39e48354ceSNicholas Bellinger 40e48354ceSNicholas Bellinger #define PRINT_BUFF(buff, len) \ 41e48354ceSNicholas Bellinger { \ 42e48354ceSNicholas Bellinger int zzz; \ 43e48354ceSNicholas Bellinger \ 44e48354ceSNicholas Bellinger pr_debug("%d:\n", __LINE__); \ 45e48354ceSNicholas Bellinger for (zzz = 0; zzz < len; zzz++) { \ 46e48354ceSNicholas Bellinger if (zzz % 16 == 0) { \ 47e48354ceSNicholas Bellinger if (zzz) \ 48e48354ceSNicholas Bellinger pr_debug("\n"); \ 49e48354ceSNicholas Bellinger pr_debug("%4i: ", zzz); \ 50e48354ceSNicholas Bellinger } \ 51e48354ceSNicholas Bellinger pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 52e48354ceSNicholas Bellinger } \ 53e48354ceSNicholas Bellinger if ((len + 1) % 16) \ 54e48354ceSNicholas Bellinger pr_debug("\n"); \ 55e48354ceSNicholas Bellinger } 56e48354ceSNicholas Bellinger 57e48354ceSNicholas Bellinger extern struct list_head g_tiqn_list; 58e48354ceSNicholas Bellinger extern spinlock_t tiqn_lock; 59e48354ceSNicholas Bellinger 60e48354ceSNicholas Bellinger /* 61e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 62e48354ceSNicholas Bellinger */ 63e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 64e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 65e48354ceSNicholas Bellinger u32 offset, 66e48354ceSNicholas Bellinger u32 xfer_len, 67e48354ceSNicholas Bellinger int recovery, 68e48354ceSNicholas Bellinger u32 r2t_sn) 69e48354ceSNicholas Bellinger { 70e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 71e48354ceSNicholas Bellinger 72e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 73e48354ceSNicholas Bellinger if (!r2t) { 74e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 75e48354ceSNicholas Bellinger return -1; 76e48354ceSNicholas Bellinger } 77e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 78e48354ceSNicholas Bellinger 79e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 80e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 81e48354ceSNicholas Bellinger r2t->offset = offset; 82e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 83e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 84e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 85e48354ceSNicholas Bellinger 86e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 87e48354ceSNicholas Bellinger 88e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 89e48354ceSNicholas Bellinger return 0; 90e48354ceSNicholas Bellinger } 91e48354ceSNicholas Bellinger 92e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 93e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 94e48354ceSNicholas Bellinger u32 offset, 95e48354ceSNicholas Bellinger u32 length) 96e48354ceSNicholas Bellinger { 97e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 98e48354ceSNicholas Bellinger 99e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 100e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 101e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 102e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 103e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 104e48354ceSNicholas Bellinger return r2t; 105e48354ceSNicholas Bellinger } 106e48354ceSNicholas Bellinger } 107e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 108e48354ceSNicholas Bellinger 109e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 110e48354ceSNicholas Bellinger " %u\n", offset, length); 111e48354ceSNicholas Bellinger return NULL; 112e48354ceSNicholas Bellinger } 113e48354ceSNicholas Bellinger 114e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 115e48354ceSNicholas Bellinger { 116e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 117e48354ceSNicholas Bellinger 118e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 119e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 120e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 121e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 122e48354ceSNicholas Bellinger return r2t; 123e48354ceSNicholas Bellinger } 124e48354ceSNicholas Bellinger } 125e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 126e48354ceSNicholas Bellinger 127e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 128e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 129e48354ceSNicholas Bellinger return NULL; 130e48354ceSNicholas Bellinger } 131e48354ceSNicholas Bellinger 132e48354ceSNicholas Bellinger /* 133e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 134e48354ceSNicholas Bellinger */ 135e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 136e48354ceSNicholas Bellinger { 137e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 138e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 139e48354ceSNicholas Bellinger } 140e48354ceSNicholas Bellinger 141e48354ceSNicholas Bellinger void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 142e48354ceSNicholas Bellinger { 143e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 144e48354ceSNicholas Bellinger 145e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 146e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 147e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 148e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 149e48354ceSNicholas Bellinger } 150e48354ceSNicholas Bellinger 151e48354ceSNicholas Bellinger /* 152e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 153e48354ceSNicholas Bellinger * iSCSI NopINs. 154e48354ceSNicholas Bellinger */ 155676687c6SNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) 156e48354ceSNicholas Bellinger { 157e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 158988e3a85SNicholas Bellinger struct se_session *se_sess = conn->sess->se_sess; 159676687c6SNicholas Bellinger int size, tag; 160e48354ceSNicholas Bellinger 1616f6b5d1eSKent Overstreet tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state); 1626f6b5d1eSKent Overstreet if (tag < 0) 1636f6b5d1eSKent Overstreet return NULL; 1646f6b5d1eSKent Overstreet 165988e3a85SNicholas Bellinger size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; 166988e3a85SNicholas Bellinger cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); 167988e3a85SNicholas Bellinger memset(cmd, 0, size); 168988e3a85SNicholas Bellinger 169988e3a85SNicholas Bellinger cmd->se_cmd.map_tag = tag; 170e48354ceSNicholas Bellinger cmd->conn = conn; 1712fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 172e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 173e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 174e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 175e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 176e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 177e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 178e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 179e48354ceSNicholas Bellinger 180e48354ceSNicholas Bellinger return cmd; 181e48354ceSNicholas Bellinger } 182cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 183e48354ceSNicholas Bellinger 184e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 185e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 186e48354ceSNicholas Bellinger u32 seq_send_order) 187e48354ceSNicholas Bellinger { 188e48354ceSNicholas Bellinger u32 i; 189e48354ceSNicholas Bellinger 190e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 191e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 192e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 193e48354ceSNicholas Bellinger 194e48354ceSNicholas Bellinger return NULL; 195e48354ceSNicholas Bellinger } 196e48354ceSNicholas Bellinger 197e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 198e48354ceSNicholas Bellinger { 199e48354ceSNicholas Bellinger u32 i; 200e48354ceSNicholas Bellinger 201e48354ceSNicholas Bellinger if (!cmd->seq_list) { 202e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 203e48354ceSNicholas Bellinger return NULL; 204e48354ceSNicholas Bellinger } 205e48354ceSNicholas Bellinger 206e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 207e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 208e48354ceSNicholas Bellinger continue; 209e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 210e48354ceSNicholas Bellinger cmd->seq_send_order++; 211e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 212e48354ceSNicholas Bellinger } 213e48354ceSNicholas Bellinger } 214e48354ceSNicholas Bellinger 215e48354ceSNicholas Bellinger return NULL; 216e48354ceSNicholas Bellinger } 217e48354ceSNicholas Bellinger 218e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 219e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 220e48354ceSNicholas Bellinger u32 r2t_sn) 221e48354ceSNicholas Bellinger { 222e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 223e48354ceSNicholas Bellinger 224e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 225e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 226e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 227e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 228e48354ceSNicholas Bellinger return r2t; 229e48354ceSNicholas Bellinger } 230e48354ceSNicholas Bellinger } 231e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 232e48354ceSNicholas Bellinger 233e48354ceSNicholas Bellinger return NULL; 234e48354ceSNicholas Bellinger } 235e48354ceSNicholas Bellinger 236e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 237e48354ceSNicholas Bellinger { 238e48354ceSNicholas Bellinger int ret; 239e48354ceSNicholas Bellinger 240e48354ceSNicholas Bellinger /* 241e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 242e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 243e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 244e48354ceSNicholas Bellinger * CRC failures. 245e48354ceSNicholas Bellinger */ 246e48354ceSNicholas Bellinger if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { 247e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 248ea7e32beSNicholas Bellinger " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, 249e48354ceSNicholas Bellinger sess->max_cmd_sn); 250ea7e32beSNicholas Bellinger ret = CMDSN_MAXCMDSN_OVERRUN; 251e48354ceSNicholas Bellinger 252e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 253e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 254e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 255e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 256e48354ceSNicholas Bellinger sess->exp_cmd_sn); 257e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 258e48354ceSNicholas Bellinger 259e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 260e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 261e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 262e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 263e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 264e48354ceSNicholas Bellinger 265e48354ceSNicholas Bellinger } else { 266e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 267e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 268e48354ceSNicholas Bellinger sess->exp_cmd_sn); 269e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 270e48354ceSNicholas Bellinger } 271e48354ceSNicholas Bellinger 272e48354ceSNicholas Bellinger return ret; 273e48354ceSNicholas Bellinger } 274e48354ceSNicholas Bellinger 275e48354ceSNicholas Bellinger /* 276e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 277e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 278e48354ceSNicholas Bellinger */ 279561bf158SNicholas Bellinger int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 280561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 281e48354ceSNicholas Bellinger { 282561bf158SNicholas Bellinger int ret, cmdsn_ret; 283561bf158SNicholas Bellinger bool reject = false; 284561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 285e48354ceSNicholas Bellinger 286e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 287e48354ceSNicholas Bellinger 28850e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 289e48354ceSNicholas Bellinger switch (cmdsn_ret) { 290e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 291e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 292e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 293e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 294561bf158SNicholas Bellinger else if (ret < 0) { 295561bf158SNicholas Bellinger reject = true; 296561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 297561bf158SNicholas Bellinger } 298e48354ceSNicholas Bellinger break; 299e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 30050e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 301561bf158SNicholas Bellinger if (ret < 0) { 302561bf158SNicholas Bellinger reject = true; 303561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 304561bf158SNicholas Bellinger break; 305561bf158SNicholas Bellinger } 306561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 307e48354ceSNicholas Bellinger break; 308e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 309ea7e32beSNicholas Bellinger case CMDSN_MAXCMDSN_OVERRUN: 310ea7e32beSNicholas Bellinger default: 311e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 312e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 313ea7e32beSNicholas Bellinger /* 314ea7e32beSNicholas Bellinger * Existing callers for iscsit_sequence_cmd() will silently 315ea7e32beSNicholas Bellinger * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 316ea7e32beSNicholas Bellinger * return for CMDSN_MAXCMDSN_OVERRUN as well.. 317ea7e32beSNicholas Bellinger */ 318ea7e32beSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 319e48354ceSNicholas Bellinger break; 320e48354ceSNicholas Bellinger } 321e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 322e48354ceSNicholas Bellinger 323561bf158SNicholas Bellinger if (reject) 324561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 325561bf158SNicholas Bellinger 326e48354ceSNicholas Bellinger return ret; 327e48354ceSNicholas Bellinger } 3283e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 329e48354ceSNicholas Bellinger 330e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 331e48354ceSNicholas Bellinger { 332e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 333e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 334e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 335e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 336e48354ceSNicholas Bellinger 337e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 338e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 339e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 340e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 341e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 342e48354ceSNicholas Bellinger return -1; 343e48354ceSNicholas Bellinger } 344e48354ceSNicholas Bellinger 345e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 346e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 347e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 348e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 349e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 350e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 351e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 352e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 353e48354ceSNicholas Bellinger return -1; 354e48354ceSNicholas Bellinger } 355e48354ceSNicholas Bellinger 356e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 357e48354ceSNicholas Bellinger return 0; 358e48354ceSNicholas Bellinger 359ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 360e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 361e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 362e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 363e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 364e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 365e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 366ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 367e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 368e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 369e48354ceSNicholas Bellinger return -1; 370e48354ceSNicholas Bellinger } 371e48354ceSNicholas Bellinger return 0; 372e48354ceSNicholas Bellinger } 373e48354ceSNicholas Bellinger 374e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 375e48354ceSNicholas Bellinger struct iscsi_conn *conn, 37666c7db68SChristoph Hellwig itt_t init_task_tag) 377e48354ceSNicholas Bellinger { 378e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 379e48354ceSNicholas Bellinger 380e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3812fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 382e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 383e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 384e48354ceSNicholas Bellinger return cmd; 385e48354ceSNicholas Bellinger } 386e48354ceSNicholas Bellinger } 387e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 388e48354ceSNicholas Bellinger 389e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 390e48354ceSNicholas Bellinger init_task_tag, conn->cid); 391e48354ceSNicholas Bellinger return NULL; 392e48354ceSNicholas Bellinger } 393e48354ceSNicholas Bellinger 394e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 395e48354ceSNicholas Bellinger struct iscsi_conn *conn, 39666c7db68SChristoph Hellwig itt_t init_task_tag, 397e48354ceSNicholas Bellinger u32 length) 398e48354ceSNicholas Bellinger { 399e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 400e48354ceSNicholas Bellinger 401e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4022fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 4033687db88SNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) 4043687db88SNicholas Bellinger continue; 405e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 406e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 407e48354ceSNicholas Bellinger return cmd; 408e48354ceSNicholas Bellinger } 409e48354ceSNicholas Bellinger } 410e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 411e48354ceSNicholas Bellinger 412e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 413e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 414e48354ceSNicholas Bellinger if (length) 415e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 416e48354ceSNicholas Bellinger 417e48354ceSNicholas Bellinger return NULL; 418e48354ceSNicholas Bellinger } 419e48354ceSNicholas Bellinger 420e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 421e48354ceSNicholas Bellinger struct iscsi_conn *conn, 422e48354ceSNicholas Bellinger u32 targ_xfer_tag) 423e48354ceSNicholas Bellinger { 424e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 425e48354ceSNicholas Bellinger 426e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4272fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 428e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 429e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 430e48354ceSNicholas Bellinger return cmd; 431e48354ceSNicholas Bellinger } 432e48354ceSNicholas Bellinger } 433e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 434e48354ceSNicholas Bellinger 435e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 436e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 437e48354ceSNicholas Bellinger return NULL; 438e48354ceSNicholas Bellinger } 439e48354ceSNicholas Bellinger 440e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 441e48354ceSNicholas Bellinger struct iscsi_session *sess, 442e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 443e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 44466c7db68SChristoph Hellwig itt_t init_task_tag) 445e48354ceSNicholas Bellinger { 446e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 447e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 448e48354ceSNicholas Bellinger /* 449e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 450e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 451e48354ceSNicholas Bellinger */ 452e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 453e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 454e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4552fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 456e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 457e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 458e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 459e48354ceSNicholas Bellinger 460e48354ceSNicholas Bellinger *cr_ptr = cr; 461e48354ceSNicholas Bellinger *cmd_ptr = cmd; 462e48354ceSNicholas Bellinger return -2; 463e48354ceSNicholas Bellinger } 464e48354ceSNicholas Bellinger } 465e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 466e48354ceSNicholas Bellinger } 467e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 468e48354ceSNicholas Bellinger /* 469e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 470e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 471e48354ceSNicholas Bellinger */ 472e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 473e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 474e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4752fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 476e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 477e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 478e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 479e48354ceSNicholas Bellinger 480e48354ceSNicholas Bellinger *cr_ptr = cr; 481e48354ceSNicholas Bellinger *cmd_ptr = cmd; 482e48354ceSNicholas Bellinger return 0; 483e48354ceSNicholas Bellinger } 484e48354ceSNicholas Bellinger } 485e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 486e48354ceSNicholas Bellinger } 487e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 488e48354ceSNicholas Bellinger 489e48354ceSNicholas Bellinger return -1; 490e48354ceSNicholas Bellinger } 491e48354ceSNicholas Bellinger 492e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 493e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 494e48354ceSNicholas Bellinger struct iscsi_conn *conn, 495e48354ceSNicholas Bellinger u8 state) 496e48354ceSNicholas Bellinger { 497e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 498e48354ceSNicholas Bellinger 499e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 500e48354ceSNicholas Bellinger if (!qr) { 501e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 502e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 503e48354ceSNicholas Bellinger return; 504e48354ceSNicholas Bellinger } 505e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 506e48354ceSNicholas Bellinger qr->cmd = cmd; 507e48354ceSNicholas Bellinger qr->state = state; 508e48354ceSNicholas Bellinger 509e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 510e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 511e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 512e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 513e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 514e48354ceSNicholas Bellinger 515d5627acbSRoland Dreier wake_up(&conn->queues_wq); 516e48354ceSNicholas Bellinger } 517e48354ceSNicholas Bellinger 518e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 519e48354ceSNicholas Bellinger { 520e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 521e48354ceSNicholas Bellinger 522e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 523e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 524e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 525e48354ceSNicholas Bellinger return NULL; 526e48354ceSNicholas Bellinger } 5271f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5281f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 529e48354ceSNicholas Bellinger 530e48354ceSNicholas Bellinger list_del(&qr->qr_list); 531e48354ceSNicholas Bellinger if (qr->cmd) 532e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 533e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 534e48354ceSNicholas Bellinger 535e48354ceSNicholas Bellinger return qr; 536e48354ceSNicholas Bellinger } 537e48354ceSNicholas Bellinger 538e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 539e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 540e48354ceSNicholas Bellinger struct iscsi_conn *conn) 541e48354ceSNicholas Bellinger { 542e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 543e48354ceSNicholas Bellinger 544e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 545e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 546e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 547e48354ceSNicholas Bellinger return; 548e48354ceSNicholas Bellinger } 549e48354ceSNicholas Bellinger 550e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 551e48354ceSNicholas Bellinger if (qr->cmd != cmd) 552e48354ceSNicholas Bellinger continue; 553e48354ceSNicholas Bellinger 554e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 555e48354ceSNicholas Bellinger list_del(&qr->qr_list); 556e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 557e48354ceSNicholas Bellinger } 558e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 559e48354ceSNicholas Bellinger 560e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 561e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 562e48354ceSNicholas Bellinger cmd->init_task_tag, 563e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 564e48354ceSNicholas Bellinger } 565e48354ceSNicholas Bellinger } 566e48354ceSNicholas Bellinger 567e48354ceSNicholas Bellinger void iscsit_add_cmd_to_response_queue( 568e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 569e48354ceSNicholas Bellinger struct iscsi_conn *conn, 570e48354ceSNicholas Bellinger u8 state) 571e48354ceSNicholas Bellinger { 572e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 573e48354ceSNicholas Bellinger 574e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 575e48354ceSNicholas Bellinger if (!qr) { 576e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 577e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 578e48354ceSNicholas Bellinger return; 579e48354ceSNicholas Bellinger } 580e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 581e48354ceSNicholas Bellinger qr->cmd = cmd; 582e48354ceSNicholas Bellinger qr->state = state; 583e48354ceSNicholas Bellinger 584e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 585e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 586e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 587e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 588e48354ceSNicholas Bellinger 589d5627acbSRoland Dreier wake_up(&conn->queues_wq); 590e48354ceSNicholas Bellinger } 591e48354ceSNicholas Bellinger 592e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 593e48354ceSNicholas Bellinger { 594e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 595e48354ceSNicholas Bellinger 596e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 597e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 598e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 599e48354ceSNicholas Bellinger return NULL; 600e48354ceSNicholas Bellinger } 601e48354ceSNicholas Bellinger 6021f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6031f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 604e48354ceSNicholas Bellinger 605e48354ceSNicholas Bellinger list_del(&qr->qr_list); 606e48354ceSNicholas Bellinger if (qr->cmd) 607e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 608e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 609e48354ceSNicholas Bellinger 610e48354ceSNicholas Bellinger return qr; 611e48354ceSNicholas Bellinger } 612e48354ceSNicholas Bellinger 613e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 614e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 615e48354ceSNicholas Bellinger struct iscsi_conn *conn) 616e48354ceSNicholas Bellinger { 617e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 618e48354ceSNicholas Bellinger 619e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 620e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 621e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 622e48354ceSNicholas Bellinger return; 623e48354ceSNicholas Bellinger } 624e48354ceSNicholas Bellinger 625e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 626e48354ceSNicholas Bellinger qr_list) { 627e48354ceSNicholas Bellinger if (qr->cmd != cmd) 628e48354ceSNicholas Bellinger continue; 629e48354ceSNicholas Bellinger 630e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 631e48354ceSNicholas Bellinger list_del(&qr->qr_list); 632e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 633e48354ceSNicholas Bellinger } 634e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 635e48354ceSNicholas Bellinger 636e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 637e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 638e48354ceSNicholas Bellinger cmd->init_task_tag, 639e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 640e48354ceSNicholas Bellinger } 641e48354ceSNicholas Bellinger } 642e48354ceSNicholas Bellinger 643d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 644d5627acbSRoland Dreier { 645d5627acbSRoland Dreier bool empty; 646d5627acbSRoland Dreier 647d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 648d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 649d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 650d5627acbSRoland Dreier 651d5627acbSRoland Dreier if (!empty) 652d5627acbSRoland Dreier return empty; 653d5627acbSRoland Dreier 654d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 655d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 656d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 657d5627acbSRoland Dreier 658d5627acbSRoland Dreier return empty; 659d5627acbSRoland Dreier } 660d5627acbSRoland Dreier 661e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 662e48354ceSNicholas Bellinger { 663e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 664e48354ceSNicholas Bellinger 665e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 666e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 667e48354ceSNicholas Bellinger list_del(&qr->qr_list); 668e48354ceSNicholas Bellinger if (qr->cmd) 669e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 670e48354ceSNicholas Bellinger 671e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 672e48354ceSNicholas Bellinger } 673e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 674e48354ceSNicholas Bellinger 675e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 676e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 677e48354ceSNicholas Bellinger qr_list) { 678e48354ceSNicholas Bellinger list_del(&qr->qr_list); 679e48354ceSNicholas Bellinger if (qr->cmd) 680e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 681e48354ceSNicholas Bellinger 682e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 683e48354ceSNicholas Bellinger } 684e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 685e48354ceSNicholas Bellinger } 686e48354ceSNicholas Bellinger 687e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 688e48354ceSNicholas Bellinger { 689988e3a85SNicholas Bellinger struct iscsi_session *sess; 690988e3a85SNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 691988e3a85SNicholas Bellinger 692988e3a85SNicholas Bellinger if (cmd->conn) 693988e3a85SNicholas Bellinger sess = cmd->conn->sess; 694988e3a85SNicholas Bellinger else 695988e3a85SNicholas Bellinger sess = cmd->sess; 696988e3a85SNicholas Bellinger 697988e3a85SNicholas Bellinger BUG_ON(!sess || !sess->se_sess); 698988e3a85SNicholas Bellinger 699e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 700e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 701e48354ceSNicholas Bellinger kfree(cmd->seq_list); 702e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 703e48354ceSNicholas Bellinger kfree(cmd->iov_data); 7049864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 705e48354ceSNicholas Bellinger 706988e3a85SNicholas Bellinger percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); 707e48354ceSNicholas Bellinger } 708d703ce2fSNicholas Bellinger EXPORT_SYMBOL(iscsit_release_cmd); 709e48354ceSNicholas Bellinger 710131e6abcSNicholas Bellinger void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, 711aafc9d15SNicholas Bellinger bool check_queues) 712d270190aSNicholas Bellinger { 713aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 714aafc9d15SNicholas Bellinger 715aafc9d15SNicholas Bellinger if (scsi_cmd) { 716aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 717aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 718aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 719aafc9d15SNicholas Bellinger } 720aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 721aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 722aafc9d15SNicholas Bellinger } 723aafc9d15SNicholas Bellinger 724aafc9d15SNicholas Bellinger if (conn && check_queues) { 725aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 726aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 727aafc9d15SNicholas Bellinger } 728aafc9d15SNicholas Bellinger } 729aafc9d15SNicholas Bellinger 730aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 731aafc9d15SNicholas Bellinger { 732aafc9d15SNicholas Bellinger struct se_cmd *se_cmd = NULL; 733aafc9d15SNicholas Bellinger int rc; 734d270190aSNicholas Bellinger /* 73520879696SMasanari Iida * Determine if a struct se_cmd is associated with 736d270190aSNicholas Bellinger * this struct iscsi_cmd. 737d270190aSNicholas Bellinger */ 738d270190aSNicholas Bellinger switch (cmd->iscsi_opcode) { 739d270190aSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 740aafc9d15SNicholas Bellinger se_cmd = &cmd->se_cmd; 741aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 742cdb72665SNicholas Bellinger /* 743cdb72665SNicholas Bellinger * Fallthrough 744cdb72665SNicholas Bellinger */ 745d270190aSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 746e255a285SNicholas Bellinger rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); 747aafc9d15SNicholas Bellinger if (!rc && shutdown && se_cmd && se_cmd->se_sess) { 748aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 749aafc9d15SNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 750aafc9d15SNicholas Bellinger } 751d270190aSNicholas Bellinger break; 752c1ce4bd5SNicholas Bellinger case ISCSI_OP_REJECT: 753c1ce4bd5SNicholas Bellinger /* 754c1ce4bd5SNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 755c1ce4bd5SNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 756c1ce4bd5SNicholas Bellinger * associated cmd->se_cmd needs to be released. 757c1ce4bd5SNicholas Bellinger */ 758c1ce4bd5SNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 759aafc9d15SNicholas Bellinger se_cmd = &cmd->se_cmd; 760aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 761aafc9d15SNicholas Bellinger 762e255a285SNicholas Bellinger rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); 763aafc9d15SNicholas Bellinger if (!rc && shutdown && se_cmd->se_sess) { 764aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 765aafc9d15SNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 766aafc9d15SNicholas Bellinger } 767c1ce4bd5SNicholas Bellinger break; 768c1ce4bd5SNicholas Bellinger } 769c1ce4bd5SNicholas Bellinger /* Fall-through */ 770d270190aSNicholas Bellinger default: 771aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, false, shutdown); 772d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 773d270190aSNicholas Bellinger break; 774d270190aSNicholas Bellinger } 775d270190aSNicholas Bellinger } 776d270190aSNicholas Bellinger 777e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 778e48354ceSNicholas Bellinger { 779e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 780e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 781e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 782e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 783e48354ceSNicholas Bellinger if (in_interrupt()) 784e48354ceSNicholas Bellinger return 2; 785e48354ceSNicholas Bellinger 786e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 787e48354ceSNicholas Bellinger return 1; 788e48354ceSNicholas Bellinger } 789e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 790e48354ceSNicholas Bellinger 791e48354ceSNicholas Bellinger return 0; 792e48354ceSNicholas Bellinger } 793e48354ceSNicholas Bellinger 794e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 795e48354ceSNicholas Bellinger { 796e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 797e48354ceSNicholas Bellinger sess->session_usage_count--; 798e48354ceSNicholas Bellinger 799e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 800e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 801e48354ceSNicholas Bellinger 802e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 803e48354ceSNicholas Bellinger } 804e48354ceSNicholas Bellinger 805e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 806e48354ceSNicholas Bellinger { 807e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 808e48354ceSNicholas Bellinger sess->session_usage_count++; 809e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 810e48354ceSNicholas Bellinger } 811e48354ceSNicholas Bellinger 812e48354ceSNicholas Bellinger /* 813e48354ceSNicholas Bellinger * Setup conn->if_marker and conn->of_marker values based upon 814e48354ceSNicholas Bellinger * the initial marker-less interval. (see iSCSI v19 A.2) 815e48354ceSNicholas Bellinger */ 816e48354ceSNicholas Bellinger int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) 817e48354ceSNicholas Bellinger { 818e48354ceSNicholas Bellinger int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; 819e48354ceSNicholas Bellinger /* 820e48354ceSNicholas Bellinger * IFMarkInt and OFMarkInt are negotiated as 32-bit words. 821e48354ceSNicholas Bellinger */ 822e48354ceSNicholas Bellinger u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); 823e48354ceSNicholas Bellinger u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); 824e48354ceSNicholas Bellinger 825e48354ceSNicholas Bellinger if (conn->conn_ops->OFMarker) { 826e48354ceSNicholas Bellinger /* 827e48354ceSNicholas Bellinger * Account for the first Login Command received not 828e48354ceSNicholas Bellinger * via iscsi_recv_msg(). 829e48354ceSNicholas Bellinger */ 830e48354ceSNicholas Bellinger conn->of_marker += ISCSI_HDR_LEN; 831e48354ceSNicholas Bellinger if (conn->of_marker <= OFMarkInt) { 832e48354ceSNicholas Bellinger conn->of_marker = (OFMarkInt - conn->of_marker); 833e48354ceSNicholas Bellinger } else { 834e48354ceSNicholas Bellinger login_ofmarker_count = (conn->of_marker / OFMarkInt); 835e48354ceSNicholas Bellinger next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + 836e48354ceSNicholas Bellinger (login_ofmarker_count * MARKER_SIZE); 837e48354ceSNicholas Bellinger conn->of_marker = (next_marker - conn->of_marker); 838e48354ceSNicholas Bellinger } 839e48354ceSNicholas Bellinger conn->of_marker_offset = 0; 840e48354ceSNicholas Bellinger pr_debug("Setting OFMarker value to %u based on Initial" 841e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->of_marker); 842e48354ceSNicholas Bellinger } 843e48354ceSNicholas Bellinger 844e48354ceSNicholas Bellinger if (conn->conn_ops->IFMarker) { 845e48354ceSNicholas Bellinger if (conn->if_marker <= IFMarkInt) { 846e48354ceSNicholas Bellinger conn->if_marker = (IFMarkInt - conn->if_marker); 847e48354ceSNicholas Bellinger } else { 848e48354ceSNicholas Bellinger login_ifmarker_count = (conn->if_marker / IFMarkInt); 849e48354ceSNicholas Bellinger next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + 850e48354ceSNicholas Bellinger (login_ifmarker_count * MARKER_SIZE); 851e48354ceSNicholas Bellinger conn->if_marker = (next_marker - conn->if_marker); 852e48354ceSNicholas Bellinger } 853e48354ceSNicholas Bellinger pr_debug("Setting IFMarker value to %u based on Initial" 854e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->if_marker); 855e48354ceSNicholas Bellinger } 856e48354ceSNicholas Bellinger 857e48354ceSNicholas Bellinger return 0; 858e48354ceSNicholas Bellinger } 859e48354ceSNicholas Bellinger 860e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 861e48354ceSNicholas Bellinger { 862e48354ceSNicholas Bellinger struct iscsi_conn *conn; 863e48354ceSNicholas Bellinger 864e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 865e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 866e48354ceSNicholas Bellinger if ((conn->cid == cid) && 867e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 868e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 869e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 870e48354ceSNicholas Bellinger return conn; 871e48354ceSNicholas Bellinger } 872e48354ceSNicholas Bellinger } 873e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 874e48354ceSNicholas Bellinger 875e48354ceSNicholas Bellinger return NULL; 876e48354ceSNicholas Bellinger } 877e48354ceSNicholas Bellinger 878e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 879e48354ceSNicholas Bellinger { 880e48354ceSNicholas Bellinger struct iscsi_conn *conn; 881e48354ceSNicholas Bellinger 882e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 883e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 884e48354ceSNicholas Bellinger if (conn->cid == cid) { 885e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 886e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 887e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 888e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 889e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 890e48354ceSNicholas Bellinger return conn; 891e48354ceSNicholas Bellinger } 892e48354ceSNicholas Bellinger } 893e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 894e48354ceSNicholas Bellinger 895e48354ceSNicholas Bellinger return NULL; 896e48354ceSNicholas Bellinger } 897e48354ceSNicholas Bellinger 898e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 899e48354ceSNicholas Bellinger { 900e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 901e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 902e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 903e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 904e48354ceSNicholas Bellinger 905e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 906e48354ceSNicholas Bellinger return; 907e48354ceSNicholas Bellinger } 908e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 909e48354ceSNicholas Bellinger } 910e48354ceSNicholas Bellinger 911e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 912e48354ceSNicholas Bellinger { 913e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 914e48354ceSNicholas Bellinger conn->conn_usage_count--; 915e48354ceSNicholas Bellinger 916e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 917e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 918e48354ceSNicholas Bellinger 919e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 920e48354ceSNicholas Bellinger } 921e48354ceSNicholas Bellinger 922e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 923e48354ceSNicholas Bellinger { 924e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 925e48354ceSNicholas Bellinger conn->conn_usage_count++; 926e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 927e48354ceSNicholas Bellinger } 928e48354ceSNicholas Bellinger 929e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 930e48354ceSNicholas Bellinger { 931e48354ceSNicholas Bellinger u8 state; 932e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 933e48354ceSNicholas Bellinger 934676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); 935e48354ceSNicholas Bellinger if (!cmd) 936e48354ceSNicholas Bellinger return -1; 937e48354ceSNicholas Bellinger 938e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 939e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 940e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 94166c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 942e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 943e48354ceSNicholas Bellinger cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : 944e48354ceSNicholas Bellinger 0xFFFFFFFF; 945e48354ceSNicholas Bellinger if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) 946e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 947e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 948e48354ceSNicholas Bellinger 949e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 9502fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 951e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 952e48354ceSNicholas Bellinger 953e48354ceSNicholas Bellinger if (want_response) 954e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 955e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 956e48354ceSNicholas Bellinger 957e48354ceSNicholas Bellinger return 0; 958e48354ceSNicholas Bellinger } 959e48354ceSNicholas Bellinger 960e48354ceSNicholas Bellinger static void iscsit_handle_nopin_response_timeout(unsigned long data) 961e48354ceSNicholas Bellinger { 962e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 963e48354ceSNicholas Bellinger 964e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 965e48354ceSNicholas Bellinger 966e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 967e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 968e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 969e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 970e48354ceSNicholas Bellinger return; 971e48354ceSNicholas Bellinger } 972e48354ceSNicholas Bellinger 973e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 974e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 975e48354ceSNicholas Bellinger conn->sess->sid); 976e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 977e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 978e48354ceSNicholas Bellinger 979e48354ceSNicholas Bellinger { 980e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 981e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 982e48354ceSNicholas Bellinger 983e48354ceSNicholas Bellinger if (tiqn) { 984e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 985e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9868359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 987e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 988e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 989e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 99004f3b31bSNicholas Bellinger atomic_long_inc(&conn->sess->conn_timeout_errors); 991e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 992e48354ceSNicholas Bellinger } 993e48354ceSNicholas Bellinger } 994e48354ceSNicholas Bellinger 995e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 996e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 997e48354ceSNicholas Bellinger } 998e48354ceSNicholas Bellinger 999e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 1000e48354ceSNicholas Bellinger { 1001e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1002e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1003e48354ceSNicholas Bellinger 1004e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1005e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1006e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1007e48354ceSNicholas Bellinger return; 1008e48354ceSNicholas Bellinger } 1009e48354ceSNicholas Bellinger 1010e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 1011e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 1012e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1013e48354ceSNicholas Bellinger } 1014e48354ceSNicholas Bellinger 1015e48354ceSNicholas Bellinger /* 1016e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1017e48354ceSNicholas Bellinger */ 1018e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 1019e48354ceSNicholas Bellinger { 1020e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1021e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1022e48354ceSNicholas Bellinger 1023e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1024e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 1025e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1026e48354ceSNicholas Bellinger return; 1027e48354ceSNicholas Bellinger } 1028e48354ceSNicholas Bellinger 1029e48354ceSNicholas Bellinger init_timer(&conn->nopin_response_timer); 1030e48354ceSNicholas Bellinger conn->nopin_response_timer.expires = 1031e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ); 1032e48354ceSNicholas Bellinger conn->nopin_response_timer.data = (unsigned long)conn; 1033e48354ceSNicholas Bellinger conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 1034e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 1035e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 1036e48354ceSNicholas Bellinger add_timer(&conn->nopin_response_timer); 1037e48354ceSNicholas Bellinger 1038e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 1039e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 1040e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1041e48354ceSNicholas Bellinger } 1042e48354ceSNicholas Bellinger 1043e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 1044e48354ceSNicholas Bellinger { 1045e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1046e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1047e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1048e48354ceSNicholas Bellinger return; 1049e48354ceSNicholas Bellinger } 1050e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1051e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1052e48354ceSNicholas Bellinger 1053e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 1054e48354ceSNicholas Bellinger 1055e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1056e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1057e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1058e48354ceSNicholas Bellinger } 1059e48354ceSNicholas Bellinger 1060e48354ceSNicholas Bellinger static void iscsit_handle_nopin_timeout(unsigned long data) 1061e48354ceSNicholas Bellinger { 1062e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 1063e48354ceSNicholas Bellinger 1064e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1065e48354ceSNicholas Bellinger 1066e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1067e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1068e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1069e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1070e48354ceSNicholas Bellinger return; 1071e48354ceSNicholas Bellinger } 1072e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1073e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1074e48354ceSNicholas Bellinger 1075e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1076e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1077e48354ceSNicholas Bellinger } 1078e48354ceSNicholas Bellinger 1079e48354ceSNicholas Bellinger /* 1080e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1081e48354ceSNicholas Bellinger */ 1082e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1083e48354ceSNicholas Bellinger { 1084e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1085e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1086e48354ceSNicholas Bellinger /* 1087e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1088e48354ceSNicholas Bellinger */ 1089e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1090e48354ceSNicholas Bellinger return; 1091e48354ceSNicholas Bellinger 1092e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1093e48354ceSNicholas Bellinger return; 1094e48354ceSNicholas Bellinger 1095e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1096e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1097e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1098e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1099e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1100e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1101e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1102e48354ceSNicholas Bellinger 1103e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1104e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1105e48354ceSNicholas Bellinger } 1106e48354ceSNicholas Bellinger 1107e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1108e48354ceSNicholas Bellinger { 1109e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1110e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1111e48354ceSNicholas Bellinger /* 1112e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1113e48354ceSNicholas Bellinger */ 1114e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1115e48354ceSNicholas Bellinger return; 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 1123e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1124e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1125e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1126e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1127e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1128e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1129e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1130e48354ceSNicholas Bellinger 1131e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1132e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1133e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1134e48354ceSNicholas Bellinger } 1135e48354ceSNicholas Bellinger 1136e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1137e48354ceSNicholas Bellinger { 1138e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1139e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1140e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1141e48354ceSNicholas Bellinger return; 1142e48354ceSNicholas Bellinger } 1143e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1144e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1145e48354ceSNicholas Bellinger 1146e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1147e48354ceSNicholas Bellinger 1148e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1149e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1150e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1151e48354ceSNicholas Bellinger } 1152e48354ceSNicholas Bellinger 1153e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1154e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1155e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1156e48354ceSNicholas Bellinger int use_misc) 1157e48354ceSNicholas Bellinger { 1158e48354ceSNicholas Bellinger int tx_sent, tx_size; 1159e48354ceSNicholas Bellinger u32 iov_count; 1160e48354ceSNicholas Bellinger struct kvec *iov; 1161e48354ceSNicholas Bellinger 1162e48354ceSNicholas Bellinger send_data: 1163e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1164e48354ceSNicholas Bellinger 1165e48354ceSNicholas Bellinger if (!use_misc) { 1166e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1167e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1168e48354ceSNicholas Bellinger } else { 1169e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1170e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1171e48354ceSNicholas Bellinger } 1172e48354ceSNicholas Bellinger 1173e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1174e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1175e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1176e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1177e48354ceSNicholas Bellinger goto send_data; 1178e48354ceSNicholas Bellinger } else 1179e48354ceSNicholas Bellinger return -1; 1180e48354ceSNicholas Bellinger } 1181e48354ceSNicholas Bellinger cmd->tx_size = 0; 1182e48354ceSNicholas Bellinger 1183e48354ceSNicholas Bellinger return 0; 1184e48354ceSNicholas Bellinger } 1185e48354ceSNicholas Bellinger 1186e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1187e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1188e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1189e48354ceSNicholas Bellinger { 1190e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1191e48354ceSNicholas Bellinger struct kvec iov; 1192e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1193e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 119440b05497SNicholas Bellinger int tx_sent, iov_off; 1195e48354ceSNicholas Bellinger 1196e48354ceSNicholas Bellinger send_hdr: 1197e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1198e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1199e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1200e48354ceSNicholas Bellinger 1201e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1202e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1203e48354ceSNicholas Bellinger 1204e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1205e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1206e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1207e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1208e48354ceSNicholas Bellinger goto send_hdr; 1209e48354ceSNicholas Bellinger } 1210e48354ceSNicholas Bellinger return -1; 1211e48354ceSNicholas Bellinger } 1212e48354ceSNicholas Bellinger 1213e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 121440b05497SNicholas Bellinger /* 121540b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 121640b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 121740b05497SNicholas Bellinger */ 121840b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1219e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 122040b05497SNicholas Bellinger if (cmd->padding) 122140b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 122240b05497SNicholas Bellinger else 122340b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 122440b05497SNicholas Bellinger } else { 122540b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 122640b05497SNicholas Bellinger } 1227e48354ceSNicholas Bellinger /* 1228e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1229e48354ceSNicholas Bellinger */ 1230e48354ceSNicholas Bellinger while (data_len) { 1231e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1232e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1233e48354ceSNicholas Bellinger send_pg: 1234e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1235e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1236e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1237e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1238e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1239e48354ceSNicholas Bellinger " -EAGAIN\n"); 1240e48354ceSNicholas Bellinger goto send_pg; 1241e48354ceSNicholas Bellinger } 1242e48354ceSNicholas Bellinger 1243e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1244e48354ceSNicholas Bellinger tx_sent); 1245e48354ceSNicholas Bellinger return -1; 1246e48354ceSNicholas Bellinger } 1247e48354ceSNicholas Bellinger 1248e48354ceSNicholas Bellinger data_len -= sub_len; 1249e48354ceSNicholas Bellinger offset = 0; 1250e48354ceSNicholas Bellinger sg = sg_next(sg); 1251e48354ceSNicholas Bellinger } 1252e48354ceSNicholas Bellinger 1253e48354ceSNicholas Bellinger send_padding: 1254e48354ceSNicholas Bellinger if (cmd->padding) { 125540b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1256e48354ceSNicholas Bellinger 1257e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1258e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1259e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1260e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1261e48354ceSNicholas Bellinger goto send_padding; 1262e48354ceSNicholas Bellinger } 1263e48354ceSNicholas Bellinger return -1; 1264e48354ceSNicholas Bellinger } 1265e48354ceSNicholas Bellinger } 1266e48354ceSNicholas Bellinger 1267e48354ceSNicholas Bellinger send_datacrc: 1268e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 126940b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1270e48354ceSNicholas Bellinger 1271e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1272e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1273e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1274e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1275e48354ceSNicholas Bellinger goto send_datacrc; 1276e48354ceSNicholas Bellinger } 1277e48354ceSNicholas Bellinger return -1; 1278e48354ceSNicholas Bellinger } 1279e48354ceSNicholas Bellinger } 1280e48354ceSNicholas Bellinger 1281e48354ceSNicholas Bellinger return 0; 1282e48354ceSNicholas Bellinger } 1283e48354ceSNicholas Bellinger 1284e48354ceSNicholas Bellinger /* 1285e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1286e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1287e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1288e48354ceSNicholas Bellinger * 1289e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1290e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1291e48354ceSNicholas Bellinger */ 1292e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1293e48354ceSNicholas Bellinger { 1294e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1295baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1296e48354ceSNicholas Bellinger 1297baa4d64bSNicholas Bellinger login->login_failed = 1; 1298e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1299e48354ceSNicholas Bellinger 130068349756SNicholas Bellinger memset(&login->rsp[0], 0, ISCSI_HDR_LEN); 130168349756SNicholas Bellinger 1302baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1303e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1304e48354ceSNicholas Bellinger hdr->status_class = status_class; 1305e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 130666c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1307e48354ceSNicholas Bellinger 1308baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1309e48354ceSNicholas Bellinger } 1310e48354ceSNicholas Bellinger 1311e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1312e48354ceSNicholas Bellinger { 1313e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1314e48354ceSNicholas Bellinger 1315e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1316e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1317e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1318e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1319e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1320e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1321e48354ceSNicholas Bellinger 1322e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1323e48354ceSNicholas Bellinger } 1324e48354ceSNicholas Bellinger 1325e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1326e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1327e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1328e48354ceSNicholas Bellinger { 1329e5a4b0bbSAl Viro int data = count->data_length, rx_loop = 0, total_rx = 0; 1330e48354ceSNicholas Bellinger struct msghdr msg; 1331e48354ceSNicholas Bellinger 1332e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1333e48354ceSNicholas Bellinger return -1; 1334e48354ceSNicholas Bellinger 1335e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1336e5a4b0bbSAl Viro iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, 1337e5a4b0bbSAl Viro count->iov, count->iov_count, data); 1338e48354ceSNicholas Bellinger 1339e48354ceSNicholas Bellinger while (total_rx < data) { 1340e5a4b0bbSAl Viro rx_loop = sock_recvmsg(conn->sock, &msg, 1341e48354ceSNicholas Bellinger (data - total_rx), MSG_WAITALL); 1342e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1343e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1344e48354ceSNicholas Bellinger rx_loop, total_rx); 1345e48354ceSNicholas Bellinger return rx_loop; 1346e48354ceSNicholas Bellinger } 1347e48354ceSNicholas Bellinger total_rx += rx_loop; 1348e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1349e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1350e48354ceSNicholas Bellinger } 1351e48354ceSNicholas Bellinger 1352e48354ceSNicholas Bellinger return total_rx; 1353e48354ceSNicholas Bellinger } 1354e48354ceSNicholas Bellinger 1355e48354ceSNicholas Bellinger static int iscsit_do_tx_data( 1356e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1357e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1358e48354ceSNicholas Bellinger { 13596bf6ca75SNicholas Bellinger int ret, iov_len; 13602ff017f5SNicholas Bellinger struct kvec *iov_p; 1361e48354ceSNicholas Bellinger struct msghdr msg; 1362e48354ceSNicholas Bellinger 1363e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1364e48354ceSNicholas Bellinger return -1; 1365e48354ceSNicholas Bellinger 13666bf6ca75SNicholas Bellinger if (count->data_length <= 0) { 13676bf6ca75SNicholas Bellinger pr_err("Data length is: %d\n", count->data_length); 1368e48354ceSNicholas Bellinger return -1; 1369e48354ceSNicholas Bellinger } 1370e48354ceSNicholas Bellinger 1371e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1372e48354ceSNicholas Bellinger 1373e48354ceSNicholas Bellinger iov_p = count->iov; 1374e48354ceSNicholas Bellinger iov_len = count->iov_count; 1375e48354ceSNicholas Bellinger 13766bf6ca75SNicholas Bellinger ret = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, 13776bf6ca75SNicholas Bellinger count->data_length); 13786bf6ca75SNicholas Bellinger if (ret != count->data_length) { 13796bf6ca75SNicholas Bellinger pr_err("Unexpected ret: %d send data %d\n", 13806bf6ca75SNicholas Bellinger ret, count->data_length); 13816bf6ca75SNicholas Bellinger return -EPIPE; 1382e48354ceSNicholas Bellinger } 13836bf6ca75SNicholas Bellinger pr_debug("ret: %d, sent data: %d\n", ret, count->data_length); 1384e48354ceSNicholas Bellinger 13856bf6ca75SNicholas Bellinger return ret; 1386e48354ceSNicholas Bellinger } 1387e48354ceSNicholas Bellinger 1388e48354ceSNicholas Bellinger int rx_data( 1389e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1390e48354ceSNicholas Bellinger struct kvec *iov, 1391e48354ceSNicholas Bellinger int iov_count, 1392e48354ceSNicholas Bellinger int data) 1393e48354ceSNicholas Bellinger { 1394e48354ceSNicholas Bellinger struct iscsi_data_count c; 1395e48354ceSNicholas Bellinger 1396e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1397e48354ceSNicholas Bellinger return -1; 1398e48354ceSNicholas Bellinger 1399e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1400e48354ceSNicholas Bellinger c.iov = iov; 1401e48354ceSNicholas Bellinger c.iov_count = iov_count; 1402e48354ceSNicholas Bellinger c.data_length = data; 1403e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1404e48354ceSNicholas Bellinger 1405e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1406e48354ceSNicholas Bellinger } 1407e48354ceSNicholas Bellinger 1408e48354ceSNicholas Bellinger int tx_data( 1409e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1410e48354ceSNicholas Bellinger struct kvec *iov, 1411e48354ceSNicholas Bellinger int iov_count, 1412e48354ceSNicholas Bellinger int data) 1413e48354ceSNicholas Bellinger { 1414e48354ceSNicholas Bellinger struct iscsi_data_count c; 1415e48354ceSNicholas Bellinger 1416e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1417e48354ceSNicholas Bellinger return -1; 1418e48354ceSNicholas Bellinger 1419e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1420e48354ceSNicholas Bellinger c.iov = iov; 1421e48354ceSNicholas Bellinger c.iov_count = iov_count; 1422e48354ceSNicholas Bellinger c.data_length = data; 1423e48354ceSNicholas Bellinger c.type = ISCSI_TX_DATA; 1424e48354ceSNicholas Bellinger 1425e48354ceSNicholas Bellinger return iscsit_do_tx_data(conn, &c); 1426e48354ceSNicholas Bellinger } 1427e48354ceSNicholas Bellinger 1428e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1429e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1430e48354ceSNicholas Bellinger u8 status_class, 1431e48354ceSNicholas Bellinger u8 status_detail) 1432e48354ceSNicholas Bellinger { 1433e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1434e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1435e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1436e48354ceSNicholas Bellinger 1437e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1438e48354ceSNicholas Bellinger if (!tiqn) 1439e48354ceSNicholas Bellinger return; 1440e48354ceSNicholas Bellinger 1441e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1442e48354ceSNicholas Bellinger 1443e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1444e48354ceSNicholas Bellinger if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && 1445e48354ceSNicholas Bellinger ((get_jiffies_64() - ls->last_fail_time) < 10)) { 1446e48354ceSNicholas Bellinger /* We already have the failure info for this login */ 1447e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1448e48354ceSNicholas Bellinger return; 1449e48354ceSNicholas Bellinger } 1450e48354ceSNicholas Bellinger 1451e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1452e48354ceSNicholas Bellinger ls->accepts++; 1453e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1454e48354ceSNicholas Bellinger ls->redirects++; 1455e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1456e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1457e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1458e48354ceSNicholas Bellinger ls->authenticate_fails++; 1459e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1460e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1461e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1462e48354ceSNicholas Bellinger ls->authorize_fails++; 1463e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1464e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1465e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1466e48354ceSNicholas Bellinger ls->negotiate_fails++; 1467e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1468e48354ceSNicholas Bellinger } else { 1469e48354ceSNicholas Bellinger ls->other_fails++; 1470e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1471e48354ceSNicholas Bellinger } 1472e48354ceSNicholas Bellinger 1473e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1474e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1475e48354ceSNicholas Bellinger if (conn->param_list) 1476e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1477e48354ceSNicholas Bellinger conn->param_list); 1478fdc84d11SJoern Engel strlcpy(ls->last_intr_fail_name, 1479fdc84d11SJoern Engel (intrname ? intrname->value : "Unknown"), 1480fdc84d11SJoern Engel sizeof(ls->last_intr_fail_name)); 1481e48354ceSNicholas Bellinger 1482baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1483baa4d64bSNicholas Bellinger 1484e48354ceSNicholas Bellinger snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, 1485e48354ceSNicholas Bellinger "%s", conn->login_ip); 1486e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1487e48354ceSNicholas Bellinger } 1488e48354ceSNicholas Bellinger 1489e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1490e48354ceSNicholas Bellinger } 1491e48354ceSNicholas Bellinger 1492e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1493e48354ceSNicholas Bellinger { 1494e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1495e48354ceSNicholas Bellinger 1496e48354ceSNicholas Bellinger if (!conn || !conn->sess) 1497e48354ceSNicholas Bellinger return NULL; 1498e48354ceSNicholas Bellinger 1499e48354ceSNicholas Bellinger tpg = conn->sess->tpg; 1500e48354ceSNicholas Bellinger if (!tpg) 1501e48354ceSNicholas Bellinger return NULL; 1502e48354ceSNicholas Bellinger 1503e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1504e48354ceSNicholas Bellinger return NULL; 1505e48354ceSNicholas Bellinger 1506e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1507e48354ceSNicholas Bellinger } 1508