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1715 lines
46 KiB
1715 lines
46 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/******************************************************************************* |
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* This file contains main functions related to iSCSI Parameter negotiation. |
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* |
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* (c) Copyright 2007-2013 Datera, Inc. |
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* |
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* Author: Nicholas A. Bellinger <[email protected]> |
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* |
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******************************************************************************/ |
|
|
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#include <linux/slab.h> |
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#include <linux/uio.h> /* struct kvec */ |
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#include <target/iscsi/iscsi_target_core.h> |
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#include "iscsi_target_util.h" |
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#include "iscsi_target_parameters.h" |
|
|
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int iscsi_login_rx_data( |
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struct iscsi_conn *conn, |
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char *buf, |
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int length) |
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{ |
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int rx_got; |
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struct kvec iov; |
|
|
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memset(&iov, 0, sizeof(struct kvec)); |
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iov.iov_len = length; |
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iov.iov_base = buf; |
|
|
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rx_got = rx_data(conn, &iov, 1, length); |
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if (rx_got != length) { |
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pr_err("rx_data returned %d, expecting %d.\n", |
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rx_got, length); |
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return -1; |
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} |
|
|
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return 0 ; |
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} |
|
|
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int iscsi_login_tx_data( |
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struct iscsi_conn *conn, |
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char *pdu_buf, |
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char *text_buf, |
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int text_length) |
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{ |
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int length, tx_sent, iov_cnt = 1; |
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struct kvec iov[2]; |
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|
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length = (ISCSI_HDR_LEN + text_length); |
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|
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memset(&iov[0], 0, 2 * sizeof(struct kvec)); |
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iov[0].iov_len = ISCSI_HDR_LEN; |
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iov[0].iov_base = pdu_buf; |
|
|
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if (text_buf && text_length) { |
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iov[1].iov_len = text_length; |
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iov[1].iov_base = text_buf; |
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iov_cnt++; |
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} |
|
|
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tx_sent = tx_data(conn, &iov[0], iov_cnt, length); |
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if (tx_sent != length) { |
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pr_err("tx_data returned %d, expecting %d.\n", |
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tx_sent, length); |
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return -1; |
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} |
|
|
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return 0; |
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} |
|
|
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void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops) |
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{ |
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pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ? |
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"CRC32C" : "None"); |
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pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ? |
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"CRC32C" : "None"); |
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pr_debug("MaxRecvDataSegmentLength: %u\n", |
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conn_ops->MaxRecvDataSegmentLength); |
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} |
|
|
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void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops) |
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{ |
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pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName); |
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pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias); |
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pr_debug("TargetName: %s\n", sess_ops->TargetName); |
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pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias); |
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pr_debug("TargetPortalGroupTag: %hu\n", |
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sess_ops->TargetPortalGroupTag); |
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pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections); |
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pr_debug("InitialR2T: %s\n", |
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(sess_ops->InitialR2T) ? "Yes" : "No"); |
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pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ? |
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"Yes" : "No"); |
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pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength); |
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pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength); |
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pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait); |
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pr_debug("DefaultTime2Retain: %hu\n", |
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sess_ops->DefaultTime2Retain); |
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pr_debug("MaxOutstandingR2T: %hu\n", |
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sess_ops->MaxOutstandingR2T); |
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pr_debug("DataPDUInOrder: %s\n", |
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(sess_ops->DataPDUInOrder) ? "Yes" : "No"); |
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pr_debug("DataSequenceInOrder: %s\n", |
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(sess_ops->DataSequenceInOrder) ? "Yes" : "No"); |
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pr_debug("ErrorRecoveryLevel: %hu\n", |
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sess_ops->ErrorRecoveryLevel); |
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pr_debug("SessionType: %s\n", (sess_ops->SessionType) ? |
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"Discovery" : "Normal"); |
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} |
|
|
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void iscsi_print_params(struct iscsi_param_list *param_list) |
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{ |
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struct iscsi_param *param; |
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|
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list_for_each_entry(param, ¶m_list->param_list, p_list) |
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pr_debug("%s: %s\n", param->name, param->value); |
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} |
|
|
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static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list, |
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char *name, char *value, u8 phase, u8 scope, u8 sender, |
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u16 type_range, u8 use) |
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{ |
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struct iscsi_param *param = NULL; |
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|
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param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL); |
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if (!param) { |
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pr_err("Unable to allocate memory for parameter.\n"); |
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goto out; |
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} |
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INIT_LIST_HEAD(¶m->p_list); |
|
|
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param->name = kstrdup(name, GFP_KERNEL); |
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if (!param->name) { |
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pr_err("Unable to allocate memory for parameter name.\n"); |
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goto out; |
|
} |
|
|
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param->value = kstrdup(value, GFP_KERNEL); |
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if (!param->value) { |
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pr_err("Unable to allocate memory for parameter value.\n"); |
|
goto out; |
|
} |
|
|
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param->phase = phase; |
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param->scope = scope; |
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param->sender = sender; |
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param->use = use; |
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param->type_range = type_range; |
|
|
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switch (param->type_range) { |
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case TYPERANGE_BOOL_AND: |
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param->type = TYPE_BOOL_AND; |
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break; |
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case TYPERANGE_BOOL_OR: |
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param->type = TYPE_BOOL_OR; |
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break; |
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case TYPERANGE_0_TO_2: |
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case TYPERANGE_0_TO_3600: |
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case TYPERANGE_0_TO_32767: |
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case TYPERANGE_0_TO_65535: |
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case TYPERANGE_1_TO_65535: |
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case TYPERANGE_2_TO_3600: |
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case TYPERANGE_512_TO_16777215: |
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param->type = TYPE_NUMBER; |
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break; |
|
case TYPERANGE_AUTH: |
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case TYPERANGE_DIGEST: |
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param->type = TYPE_VALUE_LIST | TYPE_STRING; |
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break; |
|
case TYPERANGE_ISCSINAME: |
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case TYPERANGE_SESSIONTYPE: |
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case TYPERANGE_TARGETADDRESS: |
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case TYPERANGE_UTF8: |
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param->type = TYPE_STRING; |
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break; |
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default: |
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pr_err("Unknown type_range 0x%02x\n", |
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param->type_range); |
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goto out; |
|
} |
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list_add_tail(¶m->p_list, ¶m_list->param_list); |
|
|
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return param; |
|
out: |
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if (param) { |
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kfree(param->value); |
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kfree(param->name); |
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kfree(param); |
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} |
|
|
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return NULL; |
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} |
|
|
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/* #warning Add extension keys */ |
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int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr) |
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{ |
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struct iscsi_param *param = NULL; |
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struct iscsi_param_list *pl; |
|
|
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pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL); |
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if (!pl) { |
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pr_err("Unable to allocate memory for" |
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" struct iscsi_param_list.\n"); |
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return -ENOMEM; |
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} |
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INIT_LIST_HEAD(&pl->param_list); |
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INIT_LIST_HEAD(&pl->extra_response_list); |
|
|
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/* |
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* The format for setting the initial parameter definitions are: |
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* |
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* Parameter name: |
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* Initial value: |
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* Allowable phase: |
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* Scope: |
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* Allowable senders: |
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* Typerange: |
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* Use: |
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*/ |
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param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD, |
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PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
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TYPERANGE_AUTH, USE_INITIAL_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST, |
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PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
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TYPERANGE_DIGEST, USE_INITIAL_ONLY); |
|
if (!param) |
|
goto out; |
|
|
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param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST, |
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PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
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TYPERANGE_DIGEST, USE_INITIAL_ONLY); |
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if (!param) |
|
goto out; |
|
|
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param = iscsi_set_default_param(pl, MAXCONNECTIONS, |
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INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL, |
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SCOPE_SESSION_WIDE, SENDER_BOTH, |
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TYPERANGE_1_TO_65535, USE_LEADING_ONLY); |
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if (!param) |
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goto out; |
|
|
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param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS, |
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PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR, |
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TYPERANGE_UTF8, 0); |
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if (!param) |
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goto out; |
|
|
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param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME, |
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PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH, |
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TYPERANGE_ISCSINAME, USE_ALL); |
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if (!param) |
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goto out; |
|
|
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param = iscsi_set_default_param(pl, INITIATORNAME, |
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INITIAL_INITIATORNAME, PHASE_DECLARATIVE, |
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SCOPE_SESSION_WIDE, SENDER_INITIATOR, |
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TYPERANGE_ISCSINAME, USE_INITIAL_ONLY); |
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if (!param) |
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goto out; |
|
|
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param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS, |
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PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET, |
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TYPERANGE_UTF8, USE_ALL); |
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if (!param) |
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goto out; |
|
|
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param = iscsi_set_default_param(pl, INITIATORALIAS, |
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INITIAL_INITIATORALIAS, PHASE_DECLARATIVE, |
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SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8, |
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USE_ALL); |
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if (!param) |
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goto out; |
|
|
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param = iscsi_set_default_param(pl, TARGETADDRESS, |
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INITIAL_TARGETADDRESS, PHASE_DECLARATIVE, |
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SCOPE_SESSION_WIDE, SENDER_TARGET, |
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TYPERANGE_TARGETADDRESS, USE_ALL); |
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if (!param) |
|
goto out; |
|
|
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param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG, |
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INITIAL_TARGETPORTALGROUPTAG, |
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PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET, |
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TYPERANGE_0_TO_65535, USE_INITIAL_ONLY); |
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if (!param) |
|
goto out; |
|
|
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param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T, |
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PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, |
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TYPERANGE_BOOL_OR, USE_LEADING_ONLY); |
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if (!param) |
|
goto out; |
|
|
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param = iscsi_set_default_param(pl, IMMEDIATEDATA, |
|
INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL, |
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SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND, |
|
USE_LEADING_ONLY); |
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if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, MAXXMITDATASEGMENTLENGTH, |
|
INITIAL_MAXXMITDATASEGMENTLENGTH, |
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PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
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TYPERANGE_512_TO_16777215, USE_ALL); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, MAXRECVDATASEGMENTLENGTH, |
|
INITIAL_MAXRECVDATASEGMENTLENGTH, |
|
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
|
TYPERANGE_512_TO_16777215, USE_ALL); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, MAXBURSTLENGTH, |
|
INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL, |
|
SCOPE_SESSION_WIDE, SENDER_BOTH, |
|
TYPERANGE_512_TO_16777215, USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, FIRSTBURSTLENGTH, |
|
INITIAL_FIRSTBURSTLENGTH, |
|
PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, |
|
TYPERANGE_512_TO_16777215, USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT, |
|
INITIAL_DEFAULTTIME2WAIT, |
|
PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, |
|
TYPERANGE_0_TO_3600, USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, DEFAULTTIME2RETAIN, |
|
INITIAL_DEFAULTTIME2RETAIN, |
|
PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, |
|
TYPERANGE_0_TO_3600, USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T, |
|
INITIAL_MAXOUTSTANDINGR2T, |
|
PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, |
|
TYPERANGE_1_TO_65535, USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, DATAPDUINORDER, |
|
INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL, |
|
SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR, |
|
USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, DATASEQUENCEINORDER, |
|
INITIAL_DATASEQUENCEINORDER, |
|
PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, |
|
TYPERANGE_BOOL_OR, USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL, |
|
INITIAL_ERRORRECOVERYLEVEL, |
|
PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, |
|
TYPERANGE_0_TO_2, USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE, |
|
PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR, |
|
TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER, |
|
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
|
TYPERANGE_BOOL_AND, USE_INITIAL_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER, |
|
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
|
TYPERANGE_BOOL_AND, USE_INITIAL_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT, |
|
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
|
TYPERANGE_UTF8, USE_INITIAL_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT, |
|
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
|
TYPERANGE_UTF8, USE_INITIAL_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
/* |
|
* Extra parameters for ISER from RFC-5046 |
|
*/ |
|
param = iscsi_set_default_param(pl, RDMAEXTENSIONS, INITIAL_RDMAEXTENSIONS, |
|
PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, |
|
TYPERANGE_BOOL_AND, USE_LEADING_ONLY); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, INITIATORRECVDATASEGMENTLENGTH, |
|
INITIAL_INITIATORRECVDATASEGMENTLENGTH, |
|
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
|
TYPERANGE_512_TO_16777215, USE_ALL); |
|
if (!param) |
|
goto out; |
|
|
|
param = iscsi_set_default_param(pl, TARGETRECVDATASEGMENTLENGTH, |
|
INITIAL_TARGETRECVDATASEGMENTLENGTH, |
|
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, |
|
TYPERANGE_512_TO_16777215, USE_ALL); |
|
if (!param) |
|
goto out; |
|
|
|
*param_list_ptr = pl; |
|
return 0; |
|
out: |
|
iscsi_release_param_list(pl); |
|
return -1; |
|
} |
|
|
|
int iscsi_set_keys_to_negotiate( |
|
struct iscsi_param_list *param_list, |
|
bool iser) |
|
{ |
|
struct iscsi_param *param; |
|
|
|
param_list->iser = iser; |
|
|
|
list_for_each_entry(param, ¶m_list->param_list, p_list) { |
|
param->state = 0; |
|
if (!strcmp(param->name, AUTHMETHOD)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, HEADERDIGEST)) { |
|
if (!iser) |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, DATADIGEST)) { |
|
if (!iser) |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, MAXCONNECTIONS)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, TARGETNAME)) { |
|
continue; |
|
} else if (!strcmp(param->name, INITIATORNAME)) { |
|
continue; |
|
} else if (!strcmp(param->name, TARGETALIAS)) { |
|
if (param->value) |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, INITIATORALIAS)) { |
|
continue; |
|
} else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, INITIALR2T)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, IMMEDIATEDATA)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { |
|
if (!iser) |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) { |
|
continue; |
|
} else if (!strcmp(param->name, MAXBURSTLENGTH)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, FIRSTBURSTLENGTH)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, DATAPDUINORDER)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, DATASEQUENCEINORDER)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, SESSIONTYPE)) { |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, IFMARKER)) { |
|
SET_PSTATE_REJECT(param); |
|
} else if (!strcmp(param->name, OFMARKER)) { |
|
SET_PSTATE_REJECT(param); |
|
} else if (!strcmp(param->name, IFMARKINT)) { |
|
SET_PSTATE_REJECT(param); |
|
} else if (!strcmp(param->name, OFMARKINT)) { |
|
SET_PSTATE_REJECT(param); |
|
} else if (!strcmp(param->name, RDMAEXTENSIONS)) { |
|
if (iser) |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) { |
|
if (iser) |
|
SET_PSTATE_NEGOTIATE(param); |
|
} else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) { |
|
if (iser) |
|
SET_PSTATE_NEGOTIATE(param); |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int iscsi_set_keys_irrelevant_for_discovery( |
|
struct iscsi_param_list *param_list) |
|
{ |
|
struct iscsi_param *param; |
|
|
|
list_for_each_entry(param, ¶m_list->param_list, p_list) { |
|
if (!strcmp(param->name, MAXCONNECTIONS)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, INITIALR2T)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, IMMEDIATEDATA)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, MAXBURSTLENGTH)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, FIRSTBURSTLENGTH)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, DATAPDUINORDER)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, DATASEQUENCEINORDER)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, DEFAULTTIME2WAIT)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, IFMARKER)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, OFMARKER)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, IFMARKINT)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, OFMARKINT)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, RDMAEXTENSIONS)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) |
|
param->state &= ~PSTATE_NEGOTIATE; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int iscsi_copy_param_list( |
|
struct iscsi_param_list **dst_param_list, |
|
struct iscsi_param_list *src_param_list, |
|
int leading) |
|
{ |
|
struct iscsi_param *param = NULL; |
|
struct iscsi_param *new_param = NULL; |
|
struct iscsi_param_list *param_list = NULL; |
|
|
|
param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL); |
|
if (!param_list) { |
|
pr_err("Unable to allocate memory for struct iscsi_param_list.\n"); |
|
return -ENOMEM; |
|
} |
|
INIT_LIST_HEAD(¶m_list->param_list); |
|
INIT_LIST_HEAD(¶m_list->extra_response_list); |
|
|
|
list_for_each_entry(param, &src_param_list->param_list, p_list) { |
|
if (!leading && (param->scope & SCOPE_SESSION_WIDE)) { |
|
if ((strcmp(param->name, "TargetName") != 0) && |
|
(strcmp(param->name, "InitiatorName") != 0) && |
|
(strcmp(param->name, "TargetPortalGroupTag") != 0)) |
|
continue; |
|
} |
|
|
|
new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL); |
|
if (!new_param) { |
|
pr_err("Unable to allocate memory for struct iscsi_param.\n"); |
|
goto err_out; |
|
} |
|
|
|
new_param->name = kstrdup(param->name, GFP_KERNEL); |
|
new_param->value = kstrdup(param->value, GFP_KERNEL); |
|
if (!new_param->value || !new_param->name) { |
|
kfree(new_param->value); |
|
kfree(new_param->name); |
|
kfree(new_param); |
|
pr_err("Unable to allocate memory for parameter name/value.\n"); |
|
goto err_out; |
|
} |
|
|
|
new_param->set_param = param->set_param; |
|
new_param->phase = param->phase; |
|
new_param->scope = param->scope; |
|
new_param->sender = param->sender; |
|
new_param->type = param->type; |
|
new_param->use = param->use; |
|
new_param->type_range = param->type_range; |
|
|
|
list_add_tail(&new_param->p_list, ¶m_list->param_list); |
|
} |
|
|
|
if (!list_empty(¶m_list->param_list)) { |
|
*dst_param_list = param_list; |
|
} else { |
|
pr_err("No parameters allocated.\n"); |
|
goto err_out; |
|
} |
|
|
|
return 0; |
|
|
|
err_out: |
|
iscsi_release_param_list(param_list); |
|
return -ENOMEM; |
|
} |
|
|
|
static void iscsi_release_extra_responses(struct iscsi_param_list *param_list) |
|
{ |
|
struct iscsi_extra_response *er, *er_tmp; |
|
|
|
list_for_each_entry_safe(er, er_tmp, ¶m_list->extra_response_list, |
|
er_list) { |
|
list_del(&er->er_list); |
|
kfree(er); |
|
} |
|
} |
|
|
|
void iscsi_release_param_list(struct iscsi_param_list *param_list) |
|
{ |
|
struct iscsi_param *param, *param_tmp; |
|
|
|
list_for_each_entry_safe(param, param_tmp, ¶m_list->param_list, |
|
p_list) { |
|
list_del(¶m->p_list); |
|
|
|
kfree(param->name); |
|
kfree(param->value); |
|
kfree(param); |
|
} |
|
|
|
iscsi_release_extra_responses(param_list); |
|
|
|
kfree(param_list); |
|
} |
|
|
|
struct iscsi_param *iscsi_find_param_from_key( |
|
char *key, |
|
struct iscsi_param_list *param_list) |
|
{ |
|
struct iscsi_param *param; |
|
|
|
if (!key || !param_list) { |
|
pr_err("Key or parameter list pointer is NULL.\n"); |
|
return NULL; |
|
} |
|
|
|
list_for_each_entry(param, ¶m_list->param_list, p_list) { |
|
if (!strcmp(key, param->name)) |
|
return param; |
|
} |
|
|
|
pr_err("Unable to locate key \"%s\".\n", key); |
|
return NULL; |
|
} |
|
EXPORT_SYMBOL(iscsi_find_param_from_key); |
|
|
|
int iscsi_extract_key_value(char *textbuf, char **key, char **value) |
|
{ |
|
*value = strchr(textbuf, '='); |
|
if (!*value) { |
|
pr_err("Unable to locate \"=\" separator for key," |
|
" ignoring request.\n"); |
|
return -1; |
|
} |
|
|
|
*key = textbuf; |
|
**value = '\0'; |
|
*value = *value + 1; |
|
|
|
return 0; |
|
} |
|
|
|
int iscsi_update_param_value(struct iscsi_param *param, char *value) |
|
{ |
|
kfree(param->value); |
|
|
|
param->value = kstrdup(value, GFP_KERNEL); |
|
if (!param->value) { |
|
pr_err("Unable to allocate memory for value.\n"); |
|
return -ENOMEM; |
|
} |
|
|
|
pr_debug("iSCSI Parameter updated to %s=%s\n", |
|
param->name, param->value); |
|
return 0; |
|
} |
|
|
|
static int iscsi_add_notunderstood_response( |
|
char *key, |
|
char *value, |
|
struct iscsi_param_list *param_list) |
|
{ |
|
struct iscsi_extra_response *extra_response; |
|
|
|
if (strlen(value) > VALUE_MAXLEN) { |
|
pr_err("Value for notunderstood key \"%s\" exceeds %d," |
|
" protocol error.\n", key, VALUE_MAXLEN); |
|
return -1; |
|
} |
|
|
|
extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL); |
|
if (!extra_response) { |
|
pr_err("Unable to allocate memory for" |
|
" struct iscsi_extra_response.\n"); |
|
return -ENOMEM; |
|
} |
|
INIT_LIST_HEAD(&extra_response->er_list); |
|
|
|
strlcpy(extra_response->key, key, sizeof(extra_response->key)); |
|
strlcpy(extra_response->value, NOTUNDERSTOOD, |
|
sizeof(extra_response->value)); |
|
|
|
list_add_tail(&extra_response->er_list, |
|
¶m_list->extra_response_list); |
|
return 0; |
|
} |
|
|
|
static int iscsi_check_for_auth_key(char *key) |
|
{ |
|
/* |
|
* RFC 1994 |
|
*/ |
|
if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") || |
|
!strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") || |
|
!strcmp(key, "CHAP_R")) |
|
return 1; |
|
|
|
/* |
|
* RFC 2945 |
|
*/ |
|
if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") || |
|
!strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") || |
|
!strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") || |
|
!strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM")) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param, |
|
bool keys_workaround) |
|
{ |
|
if (IS_TYPE_BOOL_AND(param)) { |
|
if (!strcmp(param->value, NO)) |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
} else if (IS_TYPE_BOOL_OR(param)) { |
|
if (!strcmp(param->value, YES)) |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
|
|
if (keys_workaround) { |
|
/* |
|
* Required for gPXE iSCSI boot client |
|
*/ |
|
if (!strcmp(param->name, IMMEDIATEDATA)) |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
} |
|
} else if (IS_TYPE_NUMBER(param)) { |
|
if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
|
|
if (keys_workaround) { |
|
/* |
|
* Required for Mellanox Flexboot PXE boot ROM |
|
*/ |
|
if (!strcmp(param->name, FIRSTBURSTLENGTH)) |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
|
|
/* |
|
* Required for gPXE iSCSI boot client |
|
*/ |
|
if (!strcmp(param->name, MAXCONNECTIONS)) |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
} |
|
} else if (IS_PHASE_DECLARATIVE(param)) |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
} |
|
|
|
static int iscsi_check_boolean_value(struct iscsi_param *param, char *value) |
|
{ |
|
if (strcmp(value, YES) && strcmp(value, NO)) { |
|
pr_err("Illegal value for \"%s\", must be either" |
|
" \"%s\" or \"%s\".\n", param->name, YES, NO); |
|
return -1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr) |
|
{ |
|
char *tmpptr; |
|
int value = 0; |
|
|
|
value = simple_strtoul(value_ptr, &tmpptr, 0); |
|
|
|
if (IS_TYPERANGE_0_TO_2(param)) { |
|
if ((value < 0) || (value > 2)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" between 0 and 2.\n", param->name); |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
if (IS_TYPERANGE_0_TO_3600(param)) { |
|
if ((value < 0) || (value > 3600)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" between 0 and 3600.\n", param->name); |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
if (IS_TYPERANGE_0_TO_32767(param)) { |
|
if ((value < 0) || (value > 32767)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" between 0 and 32767.\n", param->name); |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
if (IS_TYPERANGE_0_TO_65535(param)) { |
|
if ((value < 0) || (value > 65535)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" between 0 and 65535.\n", param->name); |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
if (IS_TYPERANGE_1_TO_65535(param)) { |
|
if ((value < 1) || (value > 65535)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" between 1 and 65535.\n", param->name); |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
if (IS_TYPERANGE_2_TO_3600(param)) { |
|
if ((value < 2) || (value > 3600)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" between 2 and 3600.\n", param->name); |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
if (IS_TYPERANGE_512_TO_16777215(param)) { |
|
if ((value < 512) || (value > 16777215)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" between 512 and 16777215.\n", param->name); |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value) |
|
{ |
|
if (IS_PSTATE_PROPOSER(param)) |
|
return 0; |
|
|
|
if (IS_TYPERANGE_AUTH_PARAM(param)) { |
|
if (strcmp(value, KRB5) && strcmp(value, SPKM1) && |
|
strcmp(value, SPKM2) && strcmp(value, SRP) && |
|
strcmp(value, CHAP) && strcmp(value, NONE)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" \"%s\", \"%s\", \"%s\", \"%s\", \"%s\"" |
|
" or \"%s\".\n", param->name, KRB5, |
|
SPKM1, SPKM2, SRP, CHAP, NONE); |
|
return -1; |
|
} |
|
} |
|
if (IS_TYPERANGE_DIGEST_PARAM(param)) { |
|
if (strcmp(value, CRC32C) && strcmp(value, NONE)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" \"%s\" or \"%s\".\n", param->name, |
|
CRC32C, NONE); |
|
return -1; |
|
} |
|
} |
|
if (IS_TYPERANGE_SESSIONTYPE(param)) { |
|
if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) { |
|
pr_err("Illegal value for \"%s\", must be" |
|
" \"%s\" or \"%s\".\n", param->name, |
|
DISCOVERY, NORMAL); |
|
return -1; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static char *iscsi_check_valuelist_for_support( |
|
struct iscsi_param *param, |
|
char *value) |
|
{ |
|
char *tmp1 = NULL, *tmp2 = NULL; |
|
char *acceptor_values = NULL, *proposer_values = NULL; |
|
|
|
acceptor_values = param->value; |
|
proposer_values = value; |
|
|
|
do { |
|
if (!proposer_values) |
|
return NULL; |
|
tmp1 = strchr(proposer_values, ','); |
|
if (tmp1) |
|
*tmp1 = '\0'; |
|
acceptor_values = param->value; |
|
do { |
|
if (!acceptor_values) { |
|
if (tmp1) |
|
*tmp1 = ','; |
|
return NULL; |
|
} |
|
tmp2 = strchr(acceptor_values, ','); |
|
if (tmp2) |
|
*tmp2 = '\0'; |
|
if (!strcmp(acceptor_values, proposer_values)) { |
|
if (tmp2) |
|
*tmp2 = ','; |
|
goto out; |
|
} |
|
if (tmp2) |
|
*tmp2++ = ','; |
|
|
|
acceptor_values = tmp2; |
|
} while (acceptor_values); |
|
if (tmp1) |
|
*tmp1++ = ','; |
|
proposer_values = tmp1; |
|
} while (proposer_values); |
|
|
|
out: |
|
return proposer_values; |
|
} |
|
|
|
static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value, |
|
struct iscsi_conn *conn) |
|
{ |
|
u8 acceptor_boolean_value = 0, proposer_boolean_value = 0; |
|
char *negotiated_value = NULL; |
|
|
|
if (IS_PSTATE_ACCEPTOR(param)) { |
|
pr_err("Received key \"%s\" twice, protocol error.\n", |
|
param->name); |
|
return -1; |
|
} |
|
|
|
if (IS_PSTATE_REJECT(param)) |
|
return 0; |
|
|
|
if (IS_TYPE_BOOL_AND(param)) { |
|
if (!strcmp(value, YES)) |
|
proposer_boolean_value = 1; |
|
if (!strcmp(param->value, YES)) |
|
acceptor_boolean_value = 1; |
|
if (acceptor_boolean_value && proposer_boolean_value) |
|
do {} while (0); |
|
else { |
|
if (iscsi_update_param_value(param, NO) < 0) |
|
return -1; |
|
if (!proposer_boolean_value) |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
} |
|
} else if (IS_TYPE_BOOL_OR(param)) { |
|
if (!strcmp(value, YES)) |
|
proposer_boolean_value = 1; |
|
if (!strcmp(param->value, YES)) |
|
acceptor_boolean_value = 1; |
|
if (acceptor_boolean_value || proposer_boolean_value) { |
|
if (iscsi_update_param_value(param, YES) < 0) |
|
return -1; |
|
if (proposer_boolean_value) |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
} |
|
} else if (IS_TYPE_NUMBER(param)) { |
|
char *tmpptr, buf[11]; |
|
u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0); |
|
u32 proposer_value = simple_strtoul(value, &tmpptr, 0); |
|
|
|
memset(buf, 0, sizeof(buf)); |
|
|
|
if (!strcmp(param->name, MAXCONNECTIONS) || |
|
!strcmp(param->name, MAXBURSTLENGTH) || |
|
!strcmp(param->name, FIRSTBURSTLENGTH) || |
|
!strcmp(param->name, MAXOUTSTANDINGR2T) || |
|
!strcmp(param->name, DEFAULTTIME2RETAIN) || |
|
!strcmp(param->name, ERRORRECOVERYLEVEL)) { |
|
if (proposer_value > acceptor_value) { |
|
sprintf(buf, "%u", acceptor_value); |
|
if (iscsi_update_param_value(param, |
|
&buf[0]) < 0) |
|
return -1; |
|
} else { |
|
if (iscsi_update_param_value(param, value) < 0) |
|
return -1; |
|
} |
|
} else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { |
|
if (acceptor_value > proposer_value) { |
|
sprintf(buf, "%u", acceptor_value); |
|
if (iscsi_update_param_value(param, |
|
&buf[0]) < 0) |
|
return -1; |
|
} else { |
|
if (iscsi_update_param_value(param, value) < 0) |
|
return -1; |
|
} |
|
} else { |
|
if (iscsi_update_param_value(param, value) < 0) |
|
return -1; |
|
} |
|
|
|
if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { |
|
struct iscsi_param *param_mxdsl; |
|
unsigned long long tmp; |
|
int rc; |
|
|
|
rc = kstrtoull(param->value, 0, &tmp); |
|
if (rc < 0) |
|
return -1; |
|
|
|
conn->conn_ops->MaxRecvDataSegmentLength = tmp; |
|
pr_debug("Saving op->MaxRecvDataSegmentLength from" |
|
" original initiator received value: %u\n", |
|
conn->conn_ops->MaxRecvDataSegmentLength); |
|
|
|
param_mxdsl = iscsi_find_param_from_key( |
|
MAXXMITDATASEGMENTLENGTH, |
|
conn->param_list); |
|
if (!param_mxdsl) |
|
return -1; |
|
|
|
rc = iscsi_update_param_value(param, |
|
param_mxdsl->value); |
|
if (rc < 0) |
|
return -1; |
|
|
|
pr_debug("Updated %s to target MXDSL value: %s\n", |
|
param->name, param->value); |
|
} |
|
} else if (IS_TYPE_VALUE_LIST(param)) { |
|
negotiated_value = iscsi_check_valuelist_for_support( |
|
param, value); |
|
if (!negotiated_value) { |
|
pr_err("Proposer's value list \"%s\" contains" |
|
" no valid values from Acceptor's value list" |
|
" \"%s\".\n", value, param->value); |
|
return -1; |
|
} |
|
if (iscsi_update_param_value(param, negotiated_value) < 0) |
|
return -1; |
|
} else if (IS_PHASE_DECLARATIVE(param)) { |
|
if (iscsi_update_param_value(param, value) < 0) |
|
return -1; |
|
SET_PSTATE_REPLY_OPTIONAL(param); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int iscsi_check_proposer_state(struct iscsi_param *param, char *value) |
|
{ |
|
if (IS_PSTATE_RESPONSE_GOT(param)) { |
|
pr_err("Received key \"%s\" twice, protocol error.\n", |
|
param->name); |
|
return -1; |
|
} |
|
|
|
if (IS_TYPE_VALUE_LIST(param)) { |
|
char *comma_ptr = NULL, *tmp_ptr = NULL; |
|
|
|
comma_ptr = strchr(value, ','); |
|
if (comma_ptr) { |
|
pr_err("Illegal \",\" in response for \"%s\".\n", |
|
param->name); |
|
return -1; |
|
} |
|
|
|
tmp_ptr = iscsi_check_valuelist_for_support(param, value); |
|
if (!tmp_ptr) |
|
return -1; |
|
} |
|
|
|
if (iscsi_update_param_value(param, value) < 0) |
|
return -1; |
|
|
|
return 0; |
|
} |
|
|
|
static int iscsi_check_value(struct iscsi_param *param, char *value) |
|
{ |
|
char *comma_ptr = NULL; |
|
|
|
if (!strcmp(value, REJECT)) { |
|
if (!strcmp(param->name, IFMARKINT) || |
|
!strcmp(param->name, OFMARKINT)) { |
|
/* |
|
* Reject is not fatal for [I,O]FMarkInt, and causes |
|
* [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2) |
|
*/ |
|
SET_PSTATE_REJECT(param); |
|
return 0; |
|
} |
|
pr_err("Received %s=%s\n", param->name, value); |
|
return -1; |
|
} |
|
if (!strcmp(value, IRRELEVANT)) { |
|
pr_debug("Received %s=%s\n", param->name, value); |
|
SET_PSTATE_IRRELEVANT(param); |
|
return 0; |
|
} |
|
if (!strcmp(value, NOTUNDERSTOOD)) { |
|
if (!IS_PSTATE_PROPOSER(param)) { |
|
pr_err("Received illegal offer %s=%s\n", |
|
param->name, value); |
|
return -1; |
|
} |
|
|
|
/* #warning FIXME: Add check for X-ExtensionKey here */ |
|
pr_err("Standard iSCSI key \"%s\" cannot be answered" |
|
" with \"%s\", protocol error.\n", param->name, value); |
|
return -1; |
|
} |
|
|
|
do { |
|
comma_ptr = NULL; |
|
comma_ptr = strchr(value, ','); |
|
|
|
if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) { |
|
pr_err("Detected value separator \",\", but" |
|
" key \"%s\" does not allow a value list," |
|
" protocol error.\n", param->name); |
|
return -1; |
|
} |
|
if (comma_ptr) |
|
*comma_ptr = '\0'; |
|
|
|
if (strlen(value) > VALUE_MAXLEN) { |
|
pr_err("Value for key \"%s\" exceeds %d," |
|
" protocol error.\n", param->name, |
|
VALUE_MAXLEN); |
|
return -1; |
|
} |
|
|
|
if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) { |
|
if (iscsi_check_boolean_value(param, value) < 0) |
|
return -1; |
|
} else if (IS_TYPE_NUMBER(param)) { |
|
if (iscsi_check_numerical_value(param, value) < 0) |
|
return -1; |
|
} else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) { |
|
if (iscsi_check_string_or_list_value(param, value) < 0) |
|
return -1; |
|
} else { |
|
pr_err("Huh? 0x%02x\n", param->type); |
|
return -1; |
|
} |
|
|
|
if (comma_ptr) |
|
*comma_ptr++ = ','; |
|
|
|
value = comma_ptr; |
|
} while (value); |
|
|
|
return 0; |
|
} |
|
|
|
static struct iscsi_param *__iscsi_check_key( |
|
char *key, |
|
int sender, |
|
struct iscsi_param_list *param_list) |
|
{ |
|
struct iscsi_param *param; |
|
|
|
if (strlen(key) > KEY_MAXLEN) { |
|
pr_err("Length of key name \"%s\" exceeds %d.\n", |
|
key, KEY_MAXLEN); |
|
return NULL; |
|
} |
|
|
|
param = iscsi_find_param_from_key(key, param_list); |
|
if (!param) |
|
return NULL; |
|
|
|
if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) { |
|
pr_err("Key \"%s\" may not be sent to %s," |
|
" protocol error.\n", param->name, |
|
(sender & SENDER_RECEIVER) ? "target" : "initiator"); |
|
return NULL; |
|
} |
|
|
|
if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) { |
|
pr_err("Key \"%s\" may not be sent to %s," |
|
" protocol error.\n", param->name, |
|
(sender & SENDER_RECEIVER) ? "initiator" : "target"); |
|
return NULL; |
|
} |
|
|
|
return param; |
|
} |
|
|
|
static struct iscsi_param *iscsi_check_key( |
|
char *key, |
|
int phase, |
|
int sender, |
|
struct iscsi_param_list *param_list) |
|
{ |
|
struct iscsi_param *param; |
|
/* |
|
* Key name length must not exceed 63 bytes. (See iSCSI v20 5.1) |
|
*/ |
|
if (strlen(key) > KEY_MAXLEN) { |
|
pr_err("Length of key name \"%s\" exceeds %d.\n", |
|
key, KEY_MAXLEN); |
|
return NULL; |
|
} |
|
|
|
param = iscsi_find_param_from_key(key, param_list); |
|
if (!param) |
|
return NULL; |
|
|
|
if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) { |
|
pr_err("Key \"%s\" may not be sent to %s," |
|
" protocol error.\n", param->name, |
|
(sender & SENDER_RECEIVER) ? "target" : "initiator"); |
|
return NULL; |
|
} |
|
if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) { |
|
pr_err("Key \"%s\" may not be sent to %s," |
|
" protocol error.\n", param->name, |
|
(sender & SENDER_RECEIVER) ? "initiator" : "target"); |
|
return NULL; |
|
} |
|
|
|
if (IS_PSTATE_ACCEPTOR(param)) { |
|
pr_err("Key \"%s\" received twice, protocol error.\n", |
|
key); |
|
return NULL; |
|
} |
|
|
|
if (!phase) |
|
return param; |
|
|
|
if (!(param->phase & phase)) { |
|
pr_err("Key \"%s\" may not be negotiated during ", |
|
param->name); |
|
switch (phase) { |
|
case PHASE_SECURITY: |
|
pr_debug("Security phase.\n"); |
|
break; |
|
case PHASE_OPERATIONAL: |
|
pr_debug("Operational phase.\n"); |
|
break; |
|
default: |
|
pr_debug("Unknown phase.\n"); |
|
} |
|
return NULL; |
|
} |
|
|
|
return param; |
|
} |
|
|
|
static int iscsi_enforce_integrity_rules( |
|
u8 phase, |
|
struct iscsi_param_list *param_list) |
|
{ |
|
char *tmpptr; |
|
u8 DataSequenceInOrder = 0; |
|
u8 ErrorRecoveryLevel = 0, SessionType = 0; |
|
u32 FirstBurstLength = 0, MaxBurstLength = 0; |
|
struct iscsi_param *param = NULL; |
|
|
|
list_for_each_entry(param, ¶m_list->param_list, p_list) { |
|
if (!(param->phase & phase)) |
|
continue; |
|
if (!strcmp(param->name, SESSIONTYPE)) |
|
if (!strcmp(param->value, NORMAL)) |
|
SessionType = 1; |
|
if (!strcmp(param->name, ERRORRECOVERYLEVEL)) |
|
ErrorRecoveryLevel = simple_strtoul(param->value, |
|
&tmpptr, 0); |
|
if (!strcmp(param->name, DATASEQUENCEINORDER)) |
|
if (!strcmp(param->value, YES)) |
|
DataSequenceInOrder = 1; |
|
if (!strcmp(param->name, MAXBURSTLENGTH)) |
|
MaxBurstLength = simple_strtoul(param->value, |
|
&tmpptr, 0); |
|
} |
|
|
|
list_for_each_entry(param, ¶m_list->param_list, p_list) { |
|
if (!(param->phase & phase)) |
|
continue; |
|
if (!SessionType && !IS_PSTATE_ACCEPTOR(param)) |
|
continue; |
|
if (!strcmp(param->name, MAXOUTSTANDINGR2T) && |
|
DataSequenceInOrder && (ErrorRecoveryLevel > 0)) { |
|
if (strcmp(param->value, "1")) { |
|
if (iscsi_update_param_value(param, "1") < 0) |
|
return -1; |
|
pr_debug("Reset \"%s\" to \"%s\".\n", |
|
param->name, param->value); |
|
} |
|
} |
|
if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) { |
|
if (strcmp(param->value, "1")) { |
|
if (iscsi_update_param_value(param, "1") < 0) |
|
return -1; |
|
pr_debug("Reset \"%s\" to \"%s\".\n", |
|
param->name, param->value); |
|
} |
|
} |
|
if (!strcmp(param->name, FIRSTBURSTLENGTH)) { |
|
FirstBurstLength = simple_strtoul(param->value, |
|
&tmpptr, 0); |
|
if (FirstBurstLength > MaxBurstLength) { |
|
char tmpbuf[11]; |
|
memset(tmpbuf, 0, sizeof(tmpbuf)); |
|
sprintf(tmpbuf, "%u", MaxBurstLength); |
|
if (iscsi_update_param_value(param, tmpbuf)) |
|
return -1; |
|
pr_debug("Reset \"%s\" to \"%s\".\n", |
|
param->name, param->value); |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int iscsi_decode_text_input( |
|
u8 phase, |
|
u8 sender, |
|
char *textbuf, |
|
u32 length, |
|
struct iscsi_conn *conn) |
|
{ |
|
struct iscsi_param_list *param_list = conn->param_list; |
|
char *tmpbuf, *start = NULL, *end = NULL; |
|
|
|
tmpbuf = kmemdup_nul(textbuf, length, GFP_KERNEL); |
|
if (!tmpbuf) { |
|
pr_err("Unable to allocate %u + 1 bytes for tmpbuf.\n", length); |
|
return -ENOMEM; |
|
} |
|
|
|
start = tmpbuf; |
|
end = (start + length); |
|
|
|
while (start < end) { |
|
char *key, *value; |
|
struct iscsi_param *param; |
|
|
|
if (iscsi_extract_key_value(start, &key, &value) < 0) |
|
goto free_buffer; |
|
|
|
pr_debug("Got key: %s=%s\n", key, value); |
|
|
|
if (phase & PHASE_SECURITY) { |
|
if (iscsi_check_for_auth_key(key) > 0) { |
|
kfree(tmpbuf); |
|
return 1; |
|
} |
|
} |
|
|
|
param = iscsi_check_key(key, phase, sender, param_list); |
|
if (!param) { |
|
if (iscsi_add_notunderstood_response(key, value, |
|
param_list) < 0) |
|
goto free_buffer; |
|
|
|
start += strlen(key) + strlen(value) + 2; |
|
continue; |
|
} |
|
if (iscsi_check_value(param, value) < 0) |
|
goto free_buffer; |
|
|
|
start += strlen(key) + strlen(value) + 2; |
|
|
|
if (IS_PSTATE_PROPOSER(param)) { |
|
if (iscsi_check_proposer_state(param, value) < 0) |
|
goto free_buffer; |
|
|
|
SET_PSTATE_RESPONSE_GOT(param); |
|
} else { |
|
if (iscsi_check_acceptor_state(param, value, conn) < 0) |
|
goto free_buffer; |
|
|
|
SET_PSTATE_ACCEPTOR(param); |
|
} |
|
} |
|
|
|
kfree(tmpbuf); |
|
return 0; |
|
|
|
free_buffer: |
|
kfree(tmpbuf); |
|
return -1; |
|
} |
|
|
|
int iscsi_encode_text_output( |
|
u8 phase, |
|
u8 sender, |
|
char *textbuf, |
|
u32 *length, |
|
struct iscsi_param_list *param_list, |
|
bool keys_workaround) |
|
{ |
|
char *output_buf = NULL; |
|
struct iscsi_extra_response *er; |
|
struct iscsi_param *param; |
|
|
|
output_buf = textbuf + *length; |
|
|
|
if (iscsi_enforce_integrity_rules(phase, param_list) < 0) |
|
return -1; |
|
|
|
list_for_each_entry(param, ¶m_list->param_list, p_list) { |
|
if (!(param->sender & sender)) |
|
continue; |
|
if (IS_PSTATE_ACCEPTOR(param) && |
|
!IS_PSTATE_RESPONSE_SENT(param) && |
|
!IS_PSTATE_REPLY_OPTIONAL(param) && |
|
(param->phase & phase)) { |
|
*length += sprintf(output_buf, "%s=%s", |
|
param->name, param->value); |
|
*length += 1; |
|
output_buf = textbuf + *length; |
|
SET_PSTATE_RESPONSE_SENT(param); |
|
pr_debug("Sending key: %s=%s\n", |
|
param->name, param->value); |
|
continue; |
|
} |
|
if (IS_PSTATE_NEGOTIATE(param) && |
|
!IS_PSTATE_ACCEPTOR(param) && |
|
!IS_PSTATE_PROPOSER(param) && |
|
(param->phase & phase)) { |
|
*length += sprintf(output_buf, "%s=%s", |
|
param->name, param->value); |
|
*length += 1; |
|
output_buf = textbuf + *length; |
|
SET_PSTATE_PROPOSER(param); |
|
iscsi_check_proposer_for_optional_reply(param, |
|
keys_workaround); |
|
pr_debug("Sending key: %s=%s\n", |
|
param->name, param->value); |
|
} |
|
} |
|
|
|
list_for_each_entry(er, ¶m_list->extra_response_list, er_list) { |
|
*length += sprintf(output_buf, "%s=%s", er->key, er->value); |
|
*length += 1; |
|
output_buf = textbuf + *length; |
|
pr_debug("Sending key: %s=%s\n", er->key, er->value); |
|
} |
|
iscsi_release_extra_responses(param_list); |
|
|
|
return 0; |
|
} |
|
|
|
int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list) |
|
{ |
|
int ret = 0; |
|
struct iscsi_param *param; |
|
|
|
list_for_each_entry(param, ¶m_list->param_list, p_list) { |
|
if (IS_PSTATE_NEGOTIATE(param) && |
|
IS_PSTATE_PROPOSER(param) && |
|
!IS_PSTATE_RESPONSE_GOT(param) && |
|
!IS_PSTATE_REPLY_OPTIONAL(param) && |
|
!IS_PHASE_DECLARATIVE(param)) { |
|
pr_err("No response for proposed key \"%s\".\n", |
|
param->name); |
|
ret = -1; |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
int iscsi_change_param_value( |
|
char *keyvalue, |
|
struct iscsi_param_list *param_list, |
|
int check_key) |
|
{ |
|
char *key = NULL, *value = NULL; |
|
struct iscsi_param *param; |
|
int sender = 0; |
|
|
|
if (iscsi_extract_key_value(keyvalue, &key, &value) < 0) |
|
return -1; |
|
|
|
if (!check_key) { |
|
param = __iscsi_check_key(keyvalue, sender, param_list); |
|
if (!param) |
|
return -1; |
|
} else { |
|
param = iscsi_check_key(keyvalue, 0, sender, param_list); |
|
if (!param) |
|
return -1; |
|
|
|
param->set_param = 1; |
|
if (iscsi_check_value(param, value) < 0) { |
|
param->set_param = 0; |
|
return -1; |
|
} |
|
param->set_param = 0; |
|
} |
|
|
|
if (iscsi_update_param_value(param, value) < 0) |
|
return -1; |
|
|
|
return 0; |
|
} |
|
|
|
void iscsi_set_connection_parameters( |
|
struct iscsi_conn_ops *ops, |
|
struct iscsi_param_list *param_list) |
|
{ |
|
char *tmpptr; |
|
struct iscsi_param *param; |
|
|
|
pr_debug("---------------------------------------------------" |
|
"---------------\n"); |
|
list_for_each_entry(param, ¶m_list->param_list, p_list) { |
|
/* |
|
* Special case to set MAXXMITDATASEGMENTLENGTH from the |
|
* target requested MaxRecvDataSegmentLength, even though |
|
* this key is not sent over the wire. |
|
*/ |
|
if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) { |
|
ops->MaxXmitDataSegmentLength = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("MaxXmitDataSegmentLength: %s\n", |
|
param->value); |
|
} |
|
|
|
if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param)) |
|
continue; |
|
if (!strcmp(param->name, AUTHMETHOD)) { |
|
pr_debug("AuthMethod: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, HEADERDIGEST)) { |
|
ops->HeaderDigest = !strcmp(param->value, CRC32C); |
|
pr_debug("HeaderDigest: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, DATADIGEST)) { |
|
ops->DataDigest = !strcmp(param->value, CRC32C); |
|
pr_debug("DataDigest: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { |
|
/* |
|
* At this point iscsi_check_acceptor_state() will have |
|
* set ops->MaxRecvDataSegmentLength from the original |
|
* initiator provided value. |
|
*/ |
|
pr_debug("MaxRecvDataSegmentLength: %u\n", |
|
ops->MaxRecvDataSegmentLength); |
|
} else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) { |
|
ops->InitiatorRecvDataSegmentLength = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("InitiatorRecvDataSegmentLength: %s\n", |
|
param->value); |
|
ops->MaxRecvDataSegmentLength = |
|
ops->InitiatorRecvDataSegmentLength; |
|
pr_debug("Set MRDSL from InitiatorRecvDataSegmentLength\n"); |
|
} else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) { |
|
ops->TargetRecvDataSegmentLength = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("TargetRecvDataSegmentLength: %s\n", |
|
param->value); |
|
ops->MaxXmitDataSegmentLength = |
|
ops->TargetRecvDataSegmentLength; |
|
pr_debug("Set MXDSL from TargetRecvDataSegmentLength\n"); |
|
} |
|
} |
|
pr_debug("----------------------------------------------------" |
|
"--------------\n"); |
|
} |
|
|
|
void iscsi_set_session_parameters( |
|
struct iscsi_sess_ops *ops, |
|
struct iscsi_param_list *param_list, |
|
int leading) |
|
{ |
|
char *tmpptr; |
|
struct iscsi_param *param; |
|
|
|
pr_debug("----------------------------------------------------" |
|
"--------------\n"); |
|
list_for_each_entry(param, ¶m_list->param_list, p_list) { |
|
if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param)) |
|
continue; |
|
if (!strcmp(param->name, INITIATORNAME)) { |
|
if (!param->value) |
|
continue; |
|
if (leading) |
|
snprintf(ops->InitiatorName, |
|
sizeof(ops->InitiatorName), |
|
"%s", param->value); |
|
pr_debug("InitiatorName: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, INITIATORALIAS)) { |
|
if (!param->value) |
|
continue; |
|
snprintf(ops->InitiatorAlias, |
|
sizeof(ops->InitiatorAlias), |
|
"%s", param->value); |
|
pr_debug("InitiatorAlias: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, TARGETNAME)) { |
|
if (!param->value) |
|
continue; |
|
if (leading) |
|
snprintf(ops->TargetName, |
|
sizeof(ops->TargetName), |
|
"%s", param->value); |
|
pr_debug("TargetName: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, TARGETALIAS)) { |
|
if (!param->value) |
|
continue; |
|
snprintf(ops->TargetAlias, sizeof(ops->TargetAlias), |
|
"%s", param->value); |
|
pr_debug("TargetAlias: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) { |
|
ops->TargetPortalGroupTag = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("TargetPortalGroupTag: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, MAXCONNECTIONS)) { |
|
ops->MaxConnections = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("MaxConnections: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, INITIALR2T)) { |
|
ops->InitialR2T = !strcmp(param->value, YES); |
|
pr_debug("InitialR2T: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, IMMEDIATEDATA)) { |
|
ops->ImmediateData = !strcmp(param->value, YES); |
|
pr_debug("ImmediateData: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, MAXBURSTLENGTH)) { |
|
ops->MaxBurstLength = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("MaxBurstLength: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, FIRSTBURSTLENGTH)) { |
|
ops->FirstBurstLength = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("FirstBurstLength: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { |
|
ops->DefaultTime2Wait = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("DefaultTime2Wait: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) { |
|
ops->DefaultTime2Retain = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("DefaultTime2Retain: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) { |
|
ops->MaxOutstandingR2T = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("MaxOutstandingR2T: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, DATAPDUINORDER)) { |
|
ops->DataPDUInOrder = !strcmp(param->value, YES); |
|
pr_debug("DataPDUInOrder: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, DATASEQUENCEINORDER)) { |
|
ops->DataSequenceInOrder = !strcmp(param->value, YES); |
|
pr_debug("DataSequenceInOrder: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) { |
|
ops->ErrorRecoveryLevel = |
|
simple_strtoul(param->value, &tmpptr, 0); |
|
pr_debug("ErrorRecoveryLevel: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, SESSIONTYPE)) { |
|
ops->SessionType = !strcmp(param->value, DISCOVERY); |
|
pr_debug("SessionType: %s\n", |
|
param->value); |
|
} else if (!strcmp(param->name, RDMAEXTENSIONS)) { |
|
ops->RDMAExtensions = !strcmp(param->value, YES); |
|
pr_debug("RDMAExtensions: %s\n", |
|
param->value); |
|
} |
|
} |
|
pr_debug("----------------------------------------------------" |
|
"--------------\n"); |
|
|
|
}
|
|
|