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 28e48354ceSNicholas Bellinger #include "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 */ 155e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) 156e48354ceSNicholas Bellinger { 157e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 158988e3a85SNicholas Bellinger struct se_session *se_sess = conn->sess->se_sess; 1596f6b5d1eSKent Overstreet int size, tag, state = (gfp_mask & __GFP_WAIT) ? TASK_UNINTERRUPTIBLE : 1606f6b5d1eSKent Overstreet TASK_RUNNING; 161e48354ceSNicholas Bellinger 1626f6b5d1eSKent Overstreet tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state); 1636f6b5d1eSKent Overstreet if (tag < 0) 1646f6b5d1eSKent Overstreet return NULL; 1656f6b5d1eSKent Overstreet 166988e3a85SNicholas Bellinger size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; 167988e3a85SNicholas Bellinger cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); 168988e3a85SNicholas Bellinger memset(cmd, 0, size); 169988e3a85SNicholas Bellinger 170988e3a85SNicholas Bellinger cmd->se_cmd.map_tag = tag; 171e48354ceSNicholas Bellinger cmd->conn = conn; 1722fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 173e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 174e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 175e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 176e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 177e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 178e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 179e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 180e48354ceSNicholas Bellinger 181e48354ceSNicholas Bellinger return cmd; 182e48354ceSNicholas Bellinger } 183cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 184e48354ceSNicholas Bellinger 185e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 186e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 187e48354ceSNicholas Bellinger u32 seq_send_order) 188e48354ceSNicholas Bellinger { 189e48354ceSNicholas Bellinger u32 i; 190e48354ceSNicholas Bellinger 191e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 192e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 193e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 194e48354ceSNicholas Bellinger 195e48354ceSNicholas Bellinger return NULL; 196e48354ceSNicholas Bellinger } 197e48354ceSNicholas Bellinger 198e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 199e48354ceSNicholas Bellinger { 200e48354ceSNicholas Bellinger u32 i; 201e48354ceSNicholas Bellinger 202e48354ceSNicholas Bellinger if (!cmd->seq_list) { 203e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 204e48354ceSNicholas Bellinger return NULL; 205e48354ceSNicholas Bellinger } 206e48354ceSNicholas Bellinger 207e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 208e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 209e48354ceSNicholas Bellinger continue; 210e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 211e48354ceSNicholas Bellinger cmd->seq_send_order++; 212e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 213e48354ceSNicholas Bellinger } 214e48354ceSNicholas Bellinger } 215e48354ceSNicholas Bellinger 216e48354ceSNicholas Bellinger return NULL; 217e48354ceSNicholas Bellinger } 218e48354ceSNicholas Bellinger 219e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 220e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 221e48354ceSNicholas Bellinger u32 r2t_sn) 222e48354ceSNicholas Bellinger { 223e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 224e48354ceSNicholas Bellinger 225e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 226e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 227e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 228e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 229e48354ceSNicholas Bellinger return r2t; 230e48354ceSNicholas Bellinger } 231e48354ceSNicholas Bellinger } 232e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 233e48354ceSNicholas Bellinger 234e48354ceSNicholas Bellinger return NULL; 235e48354ceSNicholas Bellinger } 236e48354ceSNicholas Bellinger 237e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 238e48354ceSNicholas Bellinger { 239e48354ceSNicholas Bellinger int ret; 240e48354ceSNicholas Bellinger 241e48354ceSNicholas Bellinger /* 242e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 243e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 244e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 245e48354ceSNicholas Bellinger * CRC failures. 246e48354ceSNicholas Bellinger */ 247e48354ceSNicholas Bellinger if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { 248e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 249ea7e32beSNicholas Bellinger " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, 250e48354ceSNicholas Bellinger sess->max_cmd_sn); 251ea7e32beSNicholas Bellinger ret = CMDSN_MAXCMDSN_OVERRUN; 252e48354ceSNicholas Bellinger 253e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 254e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 255e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 256e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 257e48354ceSNicholas Bellinger sess->exp_cmd_sn); 258e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 259e48354ceSNicholas Bellinger 260e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 261e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 262e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 263e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 264e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 265e48354ceSNicholas Bellinger 266e48354ceSNicholas Bellinger } else { 267e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 268e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 269e48354ceSNicholas Bellinger sess->exp_cmd_sn); 270e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 271e48354ceSNicholas Bellinger } 272e48354ceSNicholas Bellinger 273e48354ceSNicholas Bellinger return ret; 274e48354ceSNicholas Bellinger } 275e48354ceSNicholas Bellinger 276e48354ceSNicholas Bellinger /* 277e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 278e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 279e48354ceSNicholas Bellinger */ 280561bf158SNicholas Bellinger int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 281561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 282e48354ceSNicholas Bellinger { 283561bf158SNicholas Bellinger int ret, cmdsn_ret; 284561bf158SNicholas Bellinger bool reject = false; 285561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 286e48354ceSNicholas Bellinger 287e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 288e48354ceSNicholas Bellinger 28950e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 290e48354ceSNicholas Bellinger switch (cmdsn_ret) { 291e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 292e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 293e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 294e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 295561bf158SNicholas Bellinger else if (ret < 0) { 296561bf158SNicholas Bellinger reject = true; 297561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 298561bf158SNicholas Bellinger } 299e48354ceSNicholas Bellinger break; 300e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 30150e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 302561bf158SNicholas Bellinger if (ret < 0) { 303561bf158SNicholas Bellinger reject = true; 304561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 305561bf158SNicholas Bellinger break; 306561bf158SNicholas Bellinger } 307561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 308e48354ceSNicholas Bellinger break; 309e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 310ea7e32beSNicholas Bellinger case CMDSN_MAXCMDSN_OVERRUN: 311ea7e32beSNicholas Bellinger default: 312e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 313e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 314ea7e32beSNicholas Bellinger /* 315ea7e32beSNicholas Bellinger * Existing callers for iscsit_sequence_cmd() will silently 316ea7e32beSNicholas Bellinger * ignore commands with CMDSN_LOWER_THAN_EXP, so force this 317ea7e32beSNicholas Bellinger * return for CMDSN_MAXCMDSN_OVERRUN as well.. 318ea7e32beSNicholas Bellinger */ 319ea7e32beSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 320e48354ceSNicholas Bellinger break; 321e48354ceSNicholas Bellinger } 322e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 323e48354ceSNicholas Bellinger 324561bf158SNicholas Bellinger if (reject) 325561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 326561bf158SNicholas Bellinger 327e48354ceSNicholas Bellinger return ret; 328e48354ceSNicholas Bellinger } 3293e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 330e48354ceSNicholas Bellinger 331e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 332e48354ceSNicholas Bellinger { 333e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 334e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 335e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 336e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 337e48354ceSNicholas Bellinger 338e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 339e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 340e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 341e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 342e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 343e48354ceSNicholas Bellinger return -1; 344e48354ceSNicholas Bellinger } 345e48354ceSNicholas Bellinger 346e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 347e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 348e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 349e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 350e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 351e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 352e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 353e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 354e48354ceSNicholas Bellinger return -1; 355e48354ceSNicholas Bellinger } 356e48354ceSNicholas Bellinger 357e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 358e48354ceSNicholas Bellinger return 0; 359e48354ceSNicholas Bellinger 360ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 361e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 362e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 363e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 364e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 365e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 366e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 367ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 368e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 369e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 370e48354ceSNicholas Bellinger return -1; 371e48354ceSNicholas Bellinger } 372e48354ceSNicholas Bellinger return 0; 373e48354ceSNicholas Bellinger } 374e48354ceSNicholas Bellinger 375e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 376e48354ceSNicholas Bellinger struct iscsi_conn *conn, 37766c7db68SChristoph Hellwig itt_t init_task_tag) 378e48354ceSNicholas Bellinger { 379e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 380e48354ceSNicholas Bellinger 381e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3822fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 383e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 384e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 385e48354ceSNicholas Bellinger return cmd; 386e48354ceSNicholas Bellinger } 387e48354ceSNicholas Bellinger } 388e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 389e48354ceSNicholas Bellinger 390e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 391e48354ceSNicholas Bellinger init_task_tag, conn->cid); 392e48354ceSNicholas Bellinger return NULL; 393e48354ceSNicholas Bellinger } 394e48354ceSNicholas Bellinger 395e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 396e48354ceSNicholas Bellinger struct iscsi_conn *conn, 39766c7db68SChristoph Hellwig itt_t init_task_tag, 398e48354ceSNicholas Bellinger u32 length) 399e48354ceSNicholas Bellinger { 400e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 401e48354ceSNicholas Bellinger 402e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4032fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 404e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 405e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 406e48354ceSNicholas Bellinger return cmd; 407e48354ceSNicholas Bellinger } 408e48354ceSNicholas Bellinger } 409e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 410e48354ceSNicholas Bellinger 411e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 412e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 413e48354ceSNicholas Bellinger if (length) 414e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 415e48354ceSNicholas Bellinger 416e48354ceSNicholas Bellinger return NULL; 417e48354ceSNicholas Bellinger } 418e48354ceSNicholas Bellinger 419e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 420e48354ceSNicholas Bellinger struct iscsi_conn *conn, 421e48354ceSNicholas Bellinger u32 targ_xfer_tag) 422e48354ceSNicholas Bellinger { 423e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 424e48354ceSNicholas Bellinger 425e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4262fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 427e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 428e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 429e48354ceSNicholas Bellinger return cmd; 430e48354ceSNicholas Bellinger } 431e48354ceSNicholas Bellinger } 432e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 433e48354ceSNicholas Bellinger 434e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 435e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 436e48354ceSNicholas Bellinger return NULL; 437e48354ceSNicholas Bellinger } 438e48354ceSNicholas Bellinger 439e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 440e48354ceSNicholas Bellinger struct iscsi_session *sess, 441e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 442e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 44366c7db68SChristoph Hellwig itt_t init_task_tag) 444e48354ceSNicholas Bellinger { 445e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 446e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 447e48354ceSNicholas Bellinger /* 448e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 449e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 450e48354ceSNicholas Bellinger */ 451e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 452e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 453e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4542fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 455e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 456e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 457e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 458e48354ceSNicholas Bellinger 459e48354ceSNicholas Bellinger *cr_ptr = cr; 460e48354ceSNicholas Bellinger *cmd_ptr = cmd; 461e48354ceSNicholas Bellinger return -2; 462e48354ceSNicholas Bellinger } 463e48354ceSNicholas Bellinger } 464e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 465e48354ceSNicholas Bellinger } 466e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 467e48354ceSNicholas Bellinger /* 468e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 469e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 470e48354ceSNicholas Bellinger */ 471e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 472e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 473e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4742fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 475e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 476e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 477e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 478e48354ceSNicholas Bellinger 479e48354ceSNicholas Bellinger *cr_ptr = cr; 480e48354ceSNicholas Bellinger *cmd_ptr = cmd; 481e48354ceSNicholas Bellinger return 0; 482e48354ceSNicholas Bellinger } 483e48354ceSNicholas Bellinger } 484e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 485e48354ceSNicholas Bellinger } 486e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 487e48354ceSNicholas Bellinger 488e48354ceSNicholas Bellinger return -1; 489e48354ceSNicholas Bellinger } 490e48354ceSNicholas Bellinger 491e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 492e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 493e48354ceSNicholas Bellinger struct iscsi_conn *conn, 494e48354ceSNicholas Bellinger u8 state) 495e48354ceSNicholas Bellinger { 496e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 497e48354ceSNicholas Bellinger 498e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 499e48354ceSNicholas Bellinger if (!qr) { 500e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 501e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 502e48354ceSNicholas Bellinger return; 503e48354ceSNicholas Bellinger } 504e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 505e48354ceSNicholas Bellinger qr->cmd = cmd; 506e48354ceSNicholas Bellinger qr->state = state; 507e48354ceSNicholas Bellinger 508e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 509e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 510e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 511e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 512e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 513e48354ceSNicholas Bellinger 514d5627acbSRoland Dreier wake_up(&conn->queues_wq); 515e48354ceSNicholas Bellinger } 516e48354ceSNicholas Bellinger 517e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 518e48354ceSNicholas Bellinger { 519e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 520e48354ceSNicholas Bellinger 521e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 522e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 523e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 524e48354ceSNicholas Bellinger return NULL; 525e48354ceSNicholas Bellinger } 5261f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5271f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 528e48354ceSNicholas Bellinger 529e48354ceSNicholas Bellinger list_del(&qr->qr_list); 530e48354ceSNicholas Bellinger if (qr->cmd) 531e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 532e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 533e48354ceSNicholas Bellinger 534e48354ceSNicholas Bellinger return qr; 535e48354ceSNicholas Bellinger } 536e48354ceSNicholas Bellinger 537e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 538e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 539e48354ceSNicholas Bellinger struct iscsi_conn *conn) 540e48354ceSNicholas Bellinger { 541e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 542e48354ceSNicholas Bellinger 543e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 544e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 545e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 546e48354ceSNicholas Bellinger return; 547e48354ceSNicholas Bellinger } 548e48354ceSNicholas Bellinger 549e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 550e48354ceSNicholas Bellinger if (qr->cmd != cmd) 551e48354ceSNicholas Bellinger continue; 552e48354ceSNicholas Bellinger 553e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 554e48354ceSNicholas Bellinger list_del(&qr->qr_list); 555e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 556e48354ceSNicholas Bellinger } 557e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 558e48354ceSNicholas Bellinger 559e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 560e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 561e48354ceSNicholas Bellinger cmd->init_task_tag, 562e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 563e48354ceSNicholas Bellinger } 564e48354ceSNicholas Bellinger } 565e48354ceSNicholas Bellinger 566e48354ceSNicholas Bellinger void iscsit_add_cmd_to_response_queue( 567e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 568e48354ceSNicholas Bellinger struct iscsi_conn *conn, 569e48354ceSNicholas Bellinger u8 state) 570e48354ceSNicholas Bellinger { 571e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 572e48354ceSNicholas Bellinger 573e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 574e48354ceSNicholas Bellinger if (!qr) { 575e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 576e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 577e48354ceSNicholas Bellinger return; 578e48354ceSNicholas Bellinger } 579e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 580e48354ceSNicholas Bellinger qr->cmd = cmd; 581e48354ceSNicholas Bellinger qr->state = state; 582e48354ceSNicholas Bellinger 583e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 584e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 585e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 586e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 587e48354ceSNicholas Bellinger 588d5627acbSRoland Dreier wake_up(&conn->queues_wq); 589e48354ceSNicholas Bellinger } 590e48354ceSNicholas Bellinger 591e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 592e48354ceSNicholas Bellinger { 593e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 594e48354ceSNicholas Bellinger 595e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 596e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 597e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 598e48354ceSNicholas Bellinger return NULL; 599e48354ceSNicholas Bellinger } 600e48354ceSNicholas Bellinger 6011f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6021f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 603e48354ceSNicholas Bellinger 604e48354ceSNicholas Bellinger list_del(&qr->qr_list); 605e48354ceSNicholas Bellinger if (qr->cmd) 606e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 607e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 608e48354ceSNicholas Bellinger 609e48354ceSNicholas Bellinger return qr; 610e48354ceSNicholas Bellinger } 611e48354ceSNicholas Bellinger 612e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 613e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 614e48354ceSNicholas Bellinger struct iscsi_conn *conn) 615e48354ceSNicholas Bellinger { 616e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 617e48354ceSNicholas Bellinger 618e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 619e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 620e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 621e48354ceSNicholas Bellinger return; 622e48354ceSNicholas Bellinger } 623e48354ceSNicholas Bellinger 624e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 625e48354ceSNicholas Bellinger qr_list) { 626e48354ceSNicholas Bellinger if (qr->cmd != cmd) 627e48354ceSNicholas Bellinger continue; 628e48354ceSNicholas Bellinger 629e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 630e48354ceSNicholas Bellinger list_del(&qr->qr_list); 631e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 632e48354ceSNicholas Bellinger } 633e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 634e48354ceSNicholas Bellinger 635e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 636e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 637e48354ceSNicholas Bellinger cmd->init_task_tag, 638e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 639e48354ceSNicholas Bellinger } 640e48354ceSNicholas Bellinger } 641e48354ceSNicholas Bellinger 642d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 643d5627acbSRoland Dreier { 644d5627acbSRoland Dreier bool empty; 645d5627acbSRoland Dreier 646d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 647d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 648d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 649d5627acbSRoland Dreier 650d5627acbSRoland Dreier if (!empty) 651d5627acbSRoland Dreier return empty; 652d5627acbSRoland Dreier 653d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 654d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 655d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 656d5627acbSRoland Dreier 657d5627acbSRoland Dreier return empty; 658d5627acbSRoland Dreier } 659d5627acbSRoland Dreier 660e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 661e48354ceSNicholas Bellinger { 662e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 663e48354ceSNicholas Bellinger 664e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 665e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 666e48354ceSNicholas Bellinger list_del(&qr->qr_list); 667e48354ceSNicholas Bellinger if (qr->cmd) 668e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 669e48354ceSNicholas Bellinger 670e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 671e48354ceSNicholas Bellinger } 672e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 673e48354ceSNicholas Bellinger 674e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 675e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 676e48354ceSNicholas Bellinger qr_list) { 677e48354ceSNicholas Bellinger list_del(&qr->qr_list); 678e48354ceSNicholas Bellinger if (qr->cmd) 679e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 680e48354ceSNicholas Bellinger 681e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 682e48354ceSNicholas Bellinger } 683e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 684e48354ceSNicholas Bellinger } 685e48354ceSNicholas Bellinger 686e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 687e48354ceSNicholas Bellinger { 688988e3a85SNicholas Bellinger struct iscsi_session *sess; 689988e3a85SNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 690988e3a85SNicholas Bellinger 691988e3a85SNicholas Bellinger if (cmd->conn) 692988e3a85SNicholas Bellinger sess = cmd->conn->sess; 693988e3a85SNicholas Bellinger else 694988e3a85SNicholas Bellinger sess = cmd->sess; 695988e3a85SNicholas Bellinger 696988e3a85SNicholas Bellinger BUG_ON(!sess || !sess->se_sess); 697988e3a85SNicholas Bellinger 698e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 699e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 700e48354ceSNicholas Bellinger kfree(cmd->seq_list); 701e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 702e48354ceSNicholas Bellinger kfree(cmd->iov_data); 7039864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 704e48354ceSNicholas Bellinger 705988e3a85SNicholas Bellinger percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); 706e48354ceSNicholas Bellinger } 707d703ce2fSNicholas Bellinger EXPORT_SYMBOL(iscsit_release_cmd); 708e48354ceSNicholas Bellinger 709aafc9d15SNicholas Bellinger static void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, 710aafc9d15SNicholas Bellinger bool check_queues) 711d270190aSNicholas Bellinger { 712aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 713aafc9d15SNicholas Bellinger 714aafc9d15SNicholas Bellinger if (scsi_cmd) { 715aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 716aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 717aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 718aafc9d15SNicholas Bellinger } 719aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 720aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 721aafc9d15SNicholas Bellinger } 722aafc9d15SNicholas Bellinger 723aafc9d15SNicholas Bellinger if (conn && check_queues) { 724aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 725aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 726aafc9d15SNicholas Bellinger } 727aafc9d15SNicholas Bellinger } 728aafc9d15SNicholas Bellinger 729aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 730aafc9d15SNicholas Bellinger { 731aafc9d15SNicholas Bellinger struct se_cmd *se_cmd = NULL; 732aafc9d15SNicholas Bellinger int rc; 733d270190aSNicholas Bellinger /* 73420879696SMasanari Iida * Determine if a struct se_cmd is associated with 735d270190aSNicholas Bellinger * this struct iscsi_cmd. 736d270190aSNicholas Bellinger */ 737d270190aSNicholas Bellinger switch (cmd->iscsi_opcode) { 738d270190aSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 739aafc9d15SNicholas Bellinger se_cmd = &cmd->se_cmd; 740aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 741cdb72665SNicholas Bellinger /* 742cdb72665SNicholas Bellinger * Fallthrough 743cdb72665SNicholas Bellinger */ 744d270190aSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 745e255a285SNicholas Bellinger rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); 746aafc9d15SNicholas Bellinger if (!rc && shutdown && se_cmd && se_cmd->se_sess) { 747aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 748aafc9d15SNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 749aafc9d15SNicholas Bellinger } 750d270190aSNicholas Bellinger break; 751c1ce4bd5SNicholas Bellinger case ISCSI_OP_REJECT: 752c1ce4bd5SNicholas Bellinger /* 753c1ce4bd5SNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 754c1ce4bd5SNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 755c1ce4bd5SNicholas Bellinger * associated cmd->se_cmd needs to be released. 756c1ce4bd5SNicholas Bellinger */ 757c1ce4bd5SNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 758aafc9d15SNicholas Bellinger se_cmd = &cmd->se_cmd; 759aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 760aafc9d15SNicholas Bellinger 761e255a285SNicholas Bellinger rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); 762aafc9d15SNicholas Bellinger if (!rc && shutdown && se_cmd->se_sess) { 763aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 764aafc9d15SNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 765aafc9d15SNicholas Bellinger } 766c1ce4bd5SNicholas Bellinger break; 767c1ce4bd5SNicholas Bellinger } 768c1ce4bd5SNicholas Bellinger /* Fall-through */ 769d270190aSNicholas Bellinger default: 770aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, false, shutdown); 771d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 772d270190aSNicholas Bellinger break; 773d270190aSNicholas Bellinger } 774d270190aSNicholas Bellinger } 775d270190aSNicholas Bellinger 776e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 777e48354ceSNicholas Bellinger { 778e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 779e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 780e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 781e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 782e48354ceSNicholas Bellinger if (in_interrupt()) 783e48354ceSNicholas Bellinger return 2; 784e48354ceSNicholas Bellinger 785e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 786e48354ceSNicholas Bellinger return 1; 787e48354ceSNicholas Bellinger } 788e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 789e48354ceSNicholas Bellinger 790e48354ceSNicholas Bellinger return 0; 791e48354ceSNicholas Bellinger } 792e48354ceSNicholas Bellinger 793e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 794e48354ceSNicholas Bellinger { 795e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 796e48354ceSNicholas Bellinger sess->session_usage_count--; 797e48354ceSNicholas Bellinger 798e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 799e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 800e48354ceSNicholas Bellinger 801e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 802e48354ceSNicholas Bellinger } 803e48354ceSNicholas Bellinger 804e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 805e48354ceSNicholas Bellinger { 806e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 807e48354ceSNicholas Bellinger sess->session_usage_count++; 808e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 809e48354ceSNicholas Bellinger } 810e48354ceSNicholas Bellinger 811e48354ceSNicholas Bellinger /* 812e48354ceSNicholas Bellinger * Setup conn->if_marker and conn->of_marker values based upon 813e48354ceSNicholas Bellinger * the initial marker-less interval. (see iSCSI v19 A.2) 814e48354ceSNicholas Bellinger */ 815e48354ceSNicholas Bellinger int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) 816e48354ceSNicholas Bellinger { 817e48354ceSNicholas Bellinger int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; 818e48354ceSNicholas Bellinger /* 819e48354ceSNicholas Bellinger * IFMarkInt and OFMarkInt are negotiated as 32-bit words. 820e48354ceSNicholas Bellinger */ 821e48354ceSNicholas Bellinger u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); 822e48354ceSNicholas Bellinger u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); 823e48354ceSNicholas Bellinger 824e48354ceSNicholas Bellinger if (conn->conn_ops->OFMarker) { 825e48354ceSNicholas Bellinger /* 826e48354ceSNicholas Bellinger * Account for the first Login Command received not 827e48354ceSNicholas Bellinger * via iscsi_recv_msg(). 828e48354ceSNicholas Bellinger */ 829e48354ceSNicholas Bellinger conn->of_marker += ISCSI_HDR_LEN; 830e48354ceSNicholas Bellinger if (conn->of_marker <= OFMarkInt) { 831e48354ceSNicholas Bellinger conn->of_marker = (OFMarkInt - conn->of_marker); 832e48354ceSNicholas Bellinger } else { 833e48354ceSNicholas Bellinger login_ofmarker_count = (conn->of_marker / OFMarkInt); 834e48354ceSNicholas Bellinger next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + 835e48354ceSNicholas Bellinger (login_ofmarker_count * MARKER_SIZE); 836e48354ceSNicholas Bellinger conn->of_marker = (next_marker - conn->of_marker); 837e48354ceSNicholas Bellinger } 838e48354ceSNicholas Bellinger conn->of_marker_offset = 0; 839e48354ceSNicholas Bellinger pr_debug("Setting OFMarker value to %u based on Initial" 840e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->of_marker); 841e48354ceSNicholas Bellinger } 842e48354ceSNicholas Bellinger 843e48354ceSNicholas Bellinger if (conn->conn_ops->IFMarker) { 844e48354ceSNicholas Bellinger if (conn->if_marker <= IFMarkInt) { 845e48354ceSNicholas Bellinger conn->if_marker = (IFMarkInt - conn->if_marker); 846e48354ceSNicholas Bellinger } else { 847e48354ceSNicholas Bellinger login_ifmarker_count = (conn->if_marker / IFMarkInt); 848e48354ceSNicholas Bellinger next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + 849e48354ceSNicholas Bellinger (login_ifmarker_count * MARKER_SIZE); 850e48354ceSNicholas Bellinger conn->if_marker = (next_marker - conn->if_marker); 851e48354ceSNicholas Bellinger } 852e48354ceSNicholas Bellinger pr_debug("Setting IFMarker value to %u based on Initial" 853e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->if_marker); 854e48354ceSNicholas Bellinger } 855e48354ceSNicholas Bellinger 856e48354ceSNicholas Bellinger return 0; 857e48354ceSNicholas Bellinger } 858e48354ceSNicholas Bellinger 859e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 860e48354ceSNicholas Bellinger { 861e48354ceSNicholas Bellinger struct iscsi_conn *conn; 862e48354ceSNicholas Bellinger 863e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 864e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 865e48354ceSNicholas Bellinger if ((conn->cid == cid) && 866e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 867e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 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 struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 878e48354ceSNicholas Bellinger { 879e48354ceSNicholas Bellinger struct iscsi_conn *conn; 880e48354ceSNicholas Bellinger 881e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 882e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 883e48354ceSNicholas Bellinger if (conn->cid == cid) { 884e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 885e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 886e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 887e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 888e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 889e48354ceSNicholas Bellinger return conn; 890e48354ceSNicholas Bellinger } 891e48354ceSNicholas Bellinger } 892e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 893e48354ceSNicholas Bellinger 894e48354ceSNicholas Bellinger return NULL; 895e48354ceSNicholas Bellinger } 896e48354ceSNicholas Bellinger 897e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 898e48354ceSNicholas Bellinger { 899e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 900e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 901e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 902e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 903e48354ceSNicholas Bellinger 904e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 905e48354ceSNicholas Bellinger return; 906e48354ceSNicholas Bellinger } 907e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 908e48354ceSNicholas Bellinger } 909e48354ceSNicholas Bellinger 910e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 911e48354ceSNicholas Bellinger { 912e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 913e48354ceSNicholas Bellinger conn->conn_usage_count--; 914e48354ceSNicholas Bellinger 915e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 916e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 917e48354ceSNicholas Bellinger 918e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 919e48354ceSNicholas Bellinger } 920e48354ceSNicholas Bellinger 921e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 922e48354ceSNicholas Bellinger { 923e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 924e48354ceSNicholas Bellinger conn->conn_usage_count++; 925e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 926e48354ceSNicholas Bellinger } 927e48354ceSNicholas Bellinger 928e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 929e48354ceSNicholas Bellinger { 930e48354ceSNicholas Bellinger u8 state; 931e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 932e48354ceSNicholas Bellinger 933e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); 934e48354ceSNicholas Bellinger if (!cmd) 935e48354ceSNicholas Bellinger return -1; 936e48354ceSNicholas Bellinger 937e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 938e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 939e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 94066c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 941e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 942e48354ceSNicholas Bellinger cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : 943e48354ceSNicholas Bellinger 0xFFFFFFFF; 944e48354ceSNicholas Bellinger if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) 945e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 946e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 947e48354ceSNicholas Bellinger 948e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 9492fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 950e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 951e48354ceSNicholas Bellinger 952e48354ceSNicholas Bellinger if (want_response) 953e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 954e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 955e48354ceSNicholas Bellinger 956e48354ceSNicholas Bellinger return 0; 957e48354ceSNicholas Bellinger } 958e48354ceSNicholas Bellinger 959e48354ceSNicholas Bellinger static void iscsit_handle_nopin_response_timeout(unsigned long data) 960e48354ceSNicholas Bellinger { 961e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 962e48354ceSNicholas Bellinger 963e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 964e48354ceSNicholas Bellinger 965e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 966e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 967e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 968e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 969e48354ceSNicholas Bellinger return; 970e48354ceSNicholas Bellinger } 971e48354ceSNicholas Bellinger 972e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 973e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 974e48354ceSNicholas Bellinger conn->sess->sid); 975e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 976e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 977e48354ceSNicholas Bellinger 978e48354ceSNicholas Bellinger { 979e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 980e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 981e48354ceSNicholas Bellinger 982e48354ceSNicholas Bellinger if (tiqn) { 983e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 984e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9858359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 986e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 987e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 988e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 98904f3b31bSNicholas Bellinger atomic_long_inc(&conn->sess->conn_timeout_errors); 990e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 991e48354ceSNicholas Bellinger } 992e48354ceSNicholas Bellinger } 993e48354ceSNicholas Bellinger 994e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 995e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 996e48354ceSNicholas Bellinger } 997e48354ceSNicholas Bellinger 998e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 999e48354ceSNicholas Bellinger { 1000e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1001e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1002e48354ceSNicholas Bellinger 1003e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1004e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1005e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1006e48354ceSNicholas Bellinger return; 1007e48354ceSNicholas Bellinger } 1008e48354ceSNicholas Bellinger 1009e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 1010e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 1011e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1012e48354ceSNicholas Bellinger } 1013e48354ceSNicholas Bellinger 1014e48354ceSNicholas Bellinger /* 1015e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1016e48354ceSNicholas Bellinger */ 1017e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 1018e48354ceSNicholas Bellinger { 1019e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1020e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1021e48354ceSNicholas Bellinger 1022e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1023e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 1024e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1025e48354ceSNicholas Bellinger return; 1026e48354ceSNicholas Bellinger } 1027e48354ceSNicholas Bellinger 1028e48354ceSNicholas Bellinger init_timer(&conn->nopin_response_timer); 1029e48354ceSNicholas Bellinger conn->nopin_response_timer.expires = 1030e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ); 1031e48354ceSNicholas Bellinger conn->nopin_response_timer.data = (unsigned long)conn; 1032e48354ceSNicholas Bellinger conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 1033e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 1034e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 1035e48354ceSNicholas Bellinger add_timer(&conn->nopin_response_timer); 1036e48354ceSNicholas Bellinger 1037e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 1038e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 1039e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1040e48354ceSNicholas Bellinger } 1041e48354ceSNicholas Bellinger 1042e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 1043e48354ceSNicholas Bellinger { 1044e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1045e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1046e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1047e48354ceSNicholas Bellinger return; 1048e48354ceSNicholas Bellinger } 1049e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1050e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1051e48354ceSNicholas Bellinger 1052e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 1053e48354ceSNicholas Bellinger 1054e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1055e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1056e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1057e48354ceSNicholas Bellinger } 1058e48354ceSNicholas Bellinger 1059e48354ceSNicholas Bellinger static void iscsit_handle_nopin_timeout(unsigned long data) 1060e48354ceSNicholas Bellinger { 1061e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 1062e48354ceSNicholas Bellinger 1063e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1064e48354ceSNicholas Bellinger 1065e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1066e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1067e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1068e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1069e48354ceSNicholas Bellinger return; 1070e48354ceSNicholas Bellinger } 1071e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1072e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1073e48354ceSNicholas Bellinger 1074e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1075e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1076e48354ceSNicholas Bellinger } 1077e48354ceSNicholas Bellinger 1078e48354ceSNicholas Bellinger /* 1079e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1080e48354ceSNicholas Bellinger */ 1081e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1082e48354ceSNicholas Bellinger { 1083e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1084e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1085e48354ceSNicholas Bellinger /* 1086e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1087e48354ceSNicholas Bellinger */ 1088e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1089e48354ceSNicholas Bellinger return; 1090e48354ceSNicholas Bellinger 1091e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1092e48354ceSNicholas Bellinger return; 1093e48354ceSNicholas Bellinger 1094e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1095e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1096e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1097e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1098e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1099e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1100e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1101e48354ceSNicholas Bellinger 1102e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1103e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1104e48354ceSNicholas Bellinger } 1105e48354ceSNicholas Bellinger 1106e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1107e48354ceSNicholas Bellinger { 1108e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1109e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1110e48354ceSNicholas Bellinger /* 1111e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1112e48354ceSNicholas Bellinger */ 1113e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1114e48354ceSNicholas Bellinger return; 1115e48354ceSNicholas Bellinger 1116e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1117e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1118e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1119e48354ceSNicholas Bellinger return; 1120e48354ceSNicholas Bellinger } 1121e48354ceSNicholas Bellinger 1122e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1123e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1124e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1125e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1126e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1127e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1128e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1129e48354ceSNicholas Bellinger 1130e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1131e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1132e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1133e48354ceSNicholas Bellinger } 1134e48354ceSNicholas Bellinger 1135e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1136e48354ceSNicholas Bellinger { 1137e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1138e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1139e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1140e48354ceSNicholas Bellinger return; 1141e48354ceSNicholas Bellinger } 1142e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1143e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1144e48354ceSNicholas Bellinger 1145e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1146e48354ceSNicholas Bellinger 1147e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1148e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1149e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1150e48354ceSNicholas Bellinger } 1151e48354ceSNicholas Bellinger 1152e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1153e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1154e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1155e48354ceSNicholas Bellinger int use_misc) 1156e48354ceSNicholas Bellinger { 1157e48354ceSNicholas Bellinger int tx_sent, tx_size; 1158e48354ceSNicholas Bellinger u32 iov_count; 1159e48354ceSNicholas Bellinger struct kvec *iov; 1160e48354ceSNicholas Bellinger 1161e48354ceSNicholas Bellinger send_data: 1162e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1163e48354ceSNicholas Bellinger 1164e48354ceSNicholas Bellinger if (!use_misc) { 1165e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1166e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1167e48354ceSNicholas Bellinger } else { 1168e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1169e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1170e48354ceSNicholas Bellinger } 1171e48354ceSNicholas Bellinger 1172e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1173e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1174e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1175e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1176e48354ceSNicholas Bellinger goto send_data; 1177e48354ceSNicholas Bellinger } else 1178e48354ceSNicholas Bellinger return -1; 1179e48354ceSNicholas Bellinger } 1180e48354ceSNicholas Bellinger cmd->tx_size = 0; 1181e48354ceSNicholas Bellinger 1182e48354ceSNicholas Bellinger return 0; 1183e48354ceSNicholas Bellinger } 1184e48354ceSNicholas Bellinger 1185e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1186e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1187e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1188e48354ceSNicholas Bellinger { 1189e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1190e48354ceSNicholas Bellinger struct kvec iov; 1191e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1192e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 119340b05497SNicholas Bellinger int tx_sent, iov_off; 1194e48354ceSNicholas Bellinger 1195e48354ceSNicholas Bellinger send_hdr: 1196e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1197e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1198e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1199e48354ceSNicholas Bellinger 1200e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1201e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1202e48354ceSNicholas Bellinger 1203e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1204e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1205e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1206e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1207e48354ceSNicholas Bellinger goto send_hdr; 1208e48354ceSNicholas Bellinger } 1209e48354ceSNicholas Bellinger return -1; 1210e48354ceSNicholas Bellinger } 1211e48354ceSNicholas Bellinger 1212e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 121340b05497SNicholas Bellinger /* 121440b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 121540b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 121640b05497SNicholas Bellinger */ 121740b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1218e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 121940b05497SNicholas Bellinger if (cmd->padding) 122040b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 122140b05497SNicholas Bellinger else 122240b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 122340b05497SNicholas Bellinger } else { 122440b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 122540b05497SNicholas Bellinger } 1226e48354ceSNicholas Bellinger /* 1227e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1228e48354ceSNicholas Bellinger */ 1229e48354ceSNicholas Bellinger while (data_len) { 1230e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1231e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1232e48354ceSNicholas Bellinger send_pg: 1233e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1234e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1235e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1236e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1237e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1238e48354ceSNicholas Bellinger " -EAGAIN\n"); 1239e48354ceSNicholas Bellinger goto send_pg; 1240e48354ceSNicholas Bellinger } 1241e48354ceSNicholas Bellinger 1242e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1243e48354ceSNicholas Bellinger tx_sent); 1244e48354ceSNicholas Bellinger return -1; 1245e48354ceSNicholas Bellinger } 1246e48354ceSNicholas Bellinger 1247e48354ceSNicholas Bellinger data_len -= sub_len; 1248e48354ceSNicholas Bellinger offset = 0; 1249e48354ceSNicholas Bellinger sg = sg_next(sg); 1250e48354ceSNicholas Bellinger } 1251e48354ceSNicholas Bellinger 1252e48354ceSNicholas Bellinger send_padding: 1253e48354ceSNicholas Bellinger if (cmd->padding) { 125440b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1255e48354ceSNicholas Bellinger 1256e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1257e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1258e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1259e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1260e48354ceSNicholas Bellinger goto send_padding; 1261e48354ceSNicholas Bellinger } 1262e48354ceSNicholas Bellinger return -1; 1263e48354ceSNicholas Bellinger } 1264e48354ceSNicholas Bellinger } 1265e48354ceSNicholas Bellinger 1266e48354ceSNicholas Bellinger send_datacrc: 1267e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 126840b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1269e48354ceSNicholas Bellinger 1270e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1271e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1272e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1273e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1274e48354ceSNicholas Bellinger goto send_datacrc; 1275e48354ceSNicholas Bellinger } 1276e48354ceSNicholas Bellinger return -1; 1277e48354ceSNicholas Bellinger } 1278e48354ceSNicholas Bellinger } 1279e48354ceSNicholas Bellinger 1280e48354ceSNicholas Bellinger return 0; 1281e48354ceSNicholas Bellinger } 1282e48354ceSNicholas Bellinger 1283e48354ceSNicholas Bellinger /* 1284e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1285e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1286e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1287e48354ceSNicholas Bellinger * 1288e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1289e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1290e48354ceSNicholas Bellinger */ 1291e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1292e48354ceSNicholas Bellinger { 1293e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1294baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1295e48354ceSNicholas Bellinger 1296baa4d64bSNicholas Bellinger login->login_failed = 1; 1297e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1298e48354ceSNicholas Bellinger 1299baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1300e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1301e48354ceSNicholas Bellinger hdr->status_class = status_class; 1302e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 130366c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1304e48354ceSNicholas Bellinger 1305baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1306e48354ceSNicholas Bellinger } 1307e48354ceSNicholas Bellinger 1308e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1309e48354ceSNicholas Bellinger { 1310e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1311e48354ceSNicholas Bellinger 1312e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1313e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1314e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1315e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1316e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1317e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1318e48354ceSNicholas Bellinger 1319e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1320e48354ceSNicholas Bellinger } 1321e48354ceSNicholas Bellinger 1322e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1323e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1324e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1325e48354ceSNicholas Bellinger { 1326e48354ceSNicholas Bellinger int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; 13272ff017f5SNicholas Bellinger struct kvec *iov_p; 1328e48354ceSNicholas Bellinger struct msghdr msg; 1329e48354ceSNicholas Bellinger 1330e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1331e48354ceSNicholas Bellinger return -1; 1332e48354ceSNicholas Bellinger 1333e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1334e48354ceSNicholas Bellinger 1335e48354ceSNicholas Bellinger iov_p = count->iov; 1336e48354ceSNicholas Bellinger iov_len = count->iov_count; 1337e48354ceSNicholas Bellinger 1338e48354ceSNicholas Bellinger while (total_rx < data) { 1339e48354ceSNicholas Bellinger rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, 1340e48354ceSNicholas Bellinger (data - total_rx), MSG_WAITALL); 1341e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1342e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1343e48354ceSNicholas Bellinger rx_loop, total_rx); 1344e48354ceSNicholas Bellinger return rx_loop; 1345e48354ceSNicholas Bellinger } 1346e48354ceSNicholas Bellinger total_rx += rx_loop; 1347e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1348e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1349e48354ceSNicholas Bellinger } 1350e48354ceSNicholas Bellinger 1351e48354ceSNicholas Bellinger return total_rx; 1352e48354ceSNicholas Bellinger } 1353e48354ceSNicholas Bellinger 1354e48354ceSNicholas Bellinger static int iscsit_do_tx_data( 1355e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1356e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1357e48354ceSNicholas Bellinger { 1358e48354ceSNicholas Bellinger int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; 13592ff017f5SNicholas Bellinger struct kvec *iov_p; 1360e48354ceSNicholas Bellinger struct msghdr msg; 1361e48354ceSNicholas Bellinger 1362e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1363e48354ceSNicholas Bellinger return -1; 1364e48354ceSNicholas Bellinger 1365e48354ceSNicholas Bellinger if (data <= 0) { 1366e48354ceSNicholas Bellinger pr_err("Data length is: %d\n", data); 1367e48354ceSNicholas Bellinger return -1; 1368e48354ceSNicholas Bellinger } 1369e48354ceSNicholas Bellinger 1370e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1371e48354ceSNicholas Bellinger 1372e48354ceSNicholas Bellinger iov_p = count->iov; 1373e48354ceSNicholas Bellinger iov_len = count->iov_count; 1374e48354ceSNicholas Bellinger 1375e48354ceSNicholas Bellinger while (total_tx < data) { 1376e48354ceSNicholas Bellinger tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, 1377e48354ceSNicholas Bellinger (data - total_tx)); 1378e48354ceSNicholas Bellinger if (tx_loop <= 0) { 1379e48354ceSNicholas Bellinger pr_debug("tx_loop: %d total_tx %d\n", 1380e48354ceSNicholas Bellinger tx_loop, total_tx); 1381e48354ceSNicholas Bellinger return tx_loop; 1382e48354ceSNicholas Bellinger } 1383e48354ceSNicholas Bellinger total_tx += tx_loop; 1384e48354ceSNicholas Bellinger pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1385e48354ceSNicholas Bellinger tx_loop, total_tx, data); 1386e48354ceSNicholas Bellinger } 1387e48354ceSNicholas Bellinger 1388e48354ceSNicholas Bellinger return total_tx; 1389e48354ceSNicholas Bellinger } 1390e48354ceSNicholas Bellinger 1391e48354ceSNicholas Bellinger int rx_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_RX_DATA; 1407e48354ceSNicholas Bellinger 1408e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1409e48354ceSNicholas Bellinger } 1410e48354ceSNicholas Bellinger 1411e48354ceSNicholas Bellinger int tx_data( 1412e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1413e48354ceSNicholas Bellinger struct kvec *iov, 1414e48354ceSNicholas Bellinger int iov_count, 1415e48354ceSNicholas Bellinger int data) 1416e48354ceSNicholas Bellinger { 1417e48354ceSNicholas Bellinger struct iscsi_data_count c; 1418e48354ceSNicholas Bellinger 1419e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1420e48354ceSNicholas Bellinger return -1; 1421e48354ceSNicholas Bellinger 1422e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1423e48354ceSNicholas Bellinger c.iov = iov; 1424e48354ceSNicholas Bellinger c.iov_count = iov_count; 1425e48354ceSNicholas Bellinger c.data_length = data; 1426e48354ceSNicholas Bellinger c.type = ISCSI_TX_DATA; 1427e48354ceSNicholas Bellinger 1428e48354ceSNicholas Bellinger return iscsit_do_tx_data(conn, &c); 1429e48354ceSNicholas Bellinger } 1430e48354ceSNicholas Bellinger 1431e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1432e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1433e48354ceSNicholas Bellinger u8 status_class, 1434e48354ceSNicholas Bellinger u8 status_detail) 1435e48354ceSNicholas Bellinger { 1436e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1437e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1438e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1439e48354ceSNicholas Bellinger 1440e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1441e48354ceSNicholas Bellinger if (!tiqn) 1442e48354ceSNicholas Bellinger return; 1443e48354ceSNicholas Bellinger 1444e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1445e48354ceSNicholas Bellinger 1446e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1447e48354ceSNicholas Bellinger if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && 1448e48354ceSNicholas Bellinger ((get_jiffies_64() - ls->last_fail_time) < 10)) { 1449e48354ceSNicholas Bellinger /* We already have the failure info for this login */ 1450e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1451e48354ceSNicholas Bellinger return; 1452e48354ceSNicholas Bellinger } 1453e48354ceSNicholas Bellinger 1454e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1455e48354ceSNicholas Bellinger ls->accepts++; 1456e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1457e48354ceSNicholas Bellinger ls->redirects++; 1458e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1459e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1460e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1461e48354ceSNicholas Bellinger ls->authenticate_fails++; 1462e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1463e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1464e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1465e48354ceSNicholas Bellinger ls->authorize_fails++; 1466e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1467e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1468e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1469e48354ceSNicholas Bellinger ls->negotiate_fails++; 1470e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1471e48354ceSNicholas Bellinger } else { 1472e48354ceSNicholas Bellinger ls->other_fails++; 1473e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1474e48354ceSNicholas Bellinger } 1475e48354ceSNicholas Bellinger 1476e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1477e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1478e48354ceSNicholas Bellinger if (conn->param_list) 1479e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1480e48354ceSNicholas Bellinger conn->param_list); 1481e48354ceSNicholas Bellinger strcpy(ls->last_intr_fail_name, 1482e48354ceSNicholas Bellinger (intrname ? intrname->value : "Unknown")); 1483e48354ceSNicholas Bellinger 1484baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1485baa4d64bSNicholas Bellinger 1486e48354ceSNicholas Bellinger snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, 1487e48354ceSNicholas Bellinger "%s", conn->login_ip); 1488e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1489e48354ceSNicholas Bellinger } 1490e48354ceSNicholas Bellinger 1491e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1492e48354ceSNicholas Bellinger } 1493e48354ceSNicholas Bellinger 1494e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1495e48354ceSNicholas Bellinger { 1496e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1497e48354ceSNicholas Bellinger 1498e48354ceSNicholas Bellinger if (!conn || !conn->sess) 1499e48354ceSNicholas Bellinger return NULL; 1500e48354ceSNicholas Bellinger 1501e48354ceSNicholas Bellinger tpg = conn->sess->tpg; 1502e48354ceSNicholas Bellinger if (!tpg) 1503e48354ceSNicholas Bellinger return NULL; 1504e48354ceSNicholas Bellinger 1505e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1506e48354ceSNicholas Bellinger return NULL; 1507e48354ceSNicholas Bellinger 1508e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1509e48354ceSNicholas Bellinger } 1510