/*******************************************************************************
* This file contains main functions related to iSCSI Parameter negotiation.
*
* \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
*
* Licensed to the Linux Foundation under the General Public License (GPL) version 2.
*
* Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
******************************************************************************/
#include <linux/slab.h>
#include "iscsi_target_core.h"
#include "iscsi_target_util.h"
#include "iscsi_target_parameters.h"
int iscsi_login_rx_data(
struct iscsi_conn *conn,
char *buf,
int length)
{
int rx_got;
struct kvec iov;
memset(&iov, 0, sizeof(struct kvec));
iov.iov_len = length;
iov.iov_base = buf;
/*
* Initial Marker-less Interval.
* Add the values regardless of IFMarker/OFMarker, considering
* it may not be negoitated yet.
*/
conn->of_marker += length;
rx_got = rx_data(conn, &iov, 1, length);
if (rx_got != length) {
pr_err("rx_data returned %d, expecting %d.\n",
rx_got, length);
return -1;
}
return 0 ;
}
int iscsi_login_tx_data(
struct iscsi_conn *conn,
char *pdu_buf,
char *text_buf,
int text_length)
{
int length, tx_sent, iov_cnt = 1;
struct kvec iov[2];
length = (ISCSI_HDR_LEN + text_length);
memset(&iov[0], 0, 2 * sizeof(struct kvec));
iov[0].iov_len = ISCSI_HDR_LEN;
iov[0].iov_base = pdu_buf;
if (text_buf && text_length) {
iov[1].iov_len = text_length;
iov[1].iov_base = text_buf;
iov_cnt++;
}
/*
* Initial Marker-less Interval.
* Add the values regardless of IFMarker/OFMarker, considering
* it may not be negoitated yet.
*/
conn->if_marker += length;
tx_sent = tx_data(conn, &iov[0], iov_cnt, length);
if (tx_sent != length) {
pr_err("tx_data returned %d, expecting %d.\n",
tx_sent, length);
return -1;
}
return 0;
}
void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops)
{
pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ?
"CRC32C" : "None");
pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ?
"CRC32C" : "None");
pr_debug("MaxRecvDataSegmentLength: %u\n",
conn_ops->MaxRecvDataSegmentLength);
pr_debug("OFMarker: %s\n", (conn_ops->OFMarker) ? "Yes" : "No");
pr_debug("IFMarker: %s\n", (conn_ops->IFMarker) ? "Yes" : "No");
if (conn_ops->OFMarker)
pr_debug("OFMarkInt: %u\n", conn_ops->OFMarkInt);
if (conn_ops->IFMarker)
pr_debug("IFMarkInt: %u\n", conn_ops->IFMarkInt);
}
void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops)
{
pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName);
pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias);
pr_debug("TargetName: %s\n", sess_ops->TargetName);
pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias);
pr_debug("TargetPortalGroupTag: %hu\n",
sess_ops->TargetPortalGroupTag);
pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections);
pr_debug("InitialR2T: %s\n",
(sess_ops->InitialR2T) ? "Yes" : "No");
pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ?
"Yes" : "No");
pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength);
pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength);
pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait);
pr_debug("DefaultTime2Retain: %hu\n",
sess_ops->DefaultTime2Retain);
pr_debug("MaxOutstandingR2T: %hu\n",
sess_ops->MaxOutstandingR2T);
pr_debug("DataPDUInOrder: %s\n",
(sess_ops->DataPDUInOrder) ? "Yes" : "No");
pr_debug("DataSequenceInOrder: %s\n",
(sess_ops->DataSequenceInOrder) ? "Yes" : "No");
pr_debug("ErrorRecoveryLevel: %hu\n",
sess_ops->ErrorRecoveryLevel);
pr_debug("SessionType: %s\n", (sess_ops->SessionType) ?
"Discovery" : "Normal");
}
void iscsi_print_params(struct iscsi_param_list *param_list)
{
struct iscsi_param *param;
list_for_each_entry(param, ¶m_list->param_list, p_list)
pr_debug("%s: %s\n", param->name, param->value);
}
static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list,
char *name, char *value, u8 phase, u8 scope, u8 sender,
u16 type_range, u8 use)
{
struct iscsi_param *param = NULL;
param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
if (!param) {
pr_err("Unable to allocate memory for parameter.\n");
goto out;
}
INIT_LIST_HEAD(¶m->p_list);
param->name = kstrdup(name, GFP_KERNEL);
if (!param->name) {
pr_err("Unable to allocate memory for parameter name.\n");
goto out;
}
param->value = kstrdup(value, GFP_KERNEL);
if (!param->value) {
pr_err("Unable to allocate memory for parameter value.\n");
goto out;
}
param->phase = phase;
param->scope = scope;
param->sender = sender;
param->use = use;
param->type_range = type_range;
switch (param->type_range) {
case TYPERANGE_BOOL_AND:
param->type = TYPE_BOOL_AND;
break;
case TYPERANGE_BOOL_OR:
param->type = TYPE_BOOL_OR;
break;
case TYPERANGE_0_TO_2:
case TYPERANGE_0_TO_3600:
case TYPERANGE_0_TO_32767:
case TYPERANGE_0_TO_65535:
case TYPERANGE_1_TO_65535:
case TYPERANGE_2_TO_3600:
case TYPERANGE_512_TO_16777215:
param->type = TYPE_NUMBER;
break;
case TYPERANGE_AUTH:
case TYPERANGE_DIGEST:
param->type = TYPE_VALUE_LIST | TYPE_STRING;
break;
case TYPERANGE_MARKINT:
param->type = TYPE_NUMBER_RANGE;
param->type_range |= TYPERANGE_1_TO_65535;
break;
case TYPERANGE_ISCSINAME:
case TYPERANGE_SESSIONTYPE:
case TYPERANGE_TARGETADDRESS:
case TYPERANGE_UTF8:
param->type = TYPE_STRING;
break;
default:
pr_err("Unknown type_range 0x%02x\n",
param->type_range);
goto out;
}
list_add_tail(¶m->p_list, ¶m_list->param_list);
return param;
out:
if (param) {
kfree(param->value);
kfree(param->name);
kfree(param);
}
return NULL;
}
/* #warning Add extension keys */
int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr)
{
struct iscsi_param *param = NULL;
struct iscsi_param_list *pl;
pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
if (!pl) {
pr_err("Unable to allocate memory for"
" struct iscsi_param_list.\n");
return -1 ;
}
INIT_LIST_HEAD(&pl->param_list);
INIT_LIST_HEAD(&pl->extra_response_list);
/*
* The format for setting the initial parameter definitions are:
*
* Parameter name:
* Initial value:
* Allowable phase:
* Scope:
* Allowable senders:
* Typerange:
* Use:
*/
param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD,
PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
TYPERANGE_AUTH, USE_INITIAL_ONLY);
if (!param)
goto out;
param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST,
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
TYPERANGE_DIGEST, USE_INITIAL_ONLY);
if (!param)
goto out;
param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST,
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
TYPERANGE_DIGEST, USE_INITIAL_ONLY);
if (!param)
goto out;
param = iscsi_set_default_param(pl, MAXCONNECTIONS,
INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL,
SCOPE_SESSION_WIDE, SENDER_BOTH,
TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
if (!param)
goto out;
param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS,
PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
TYPERANGE_UTF8, 0);
if (!param)
goto out;
param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME,
PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH,
TYPERANGE_ISCSINAME, USE_ALL);
if (!param)
goto out;
param = iscsi_set_default_param(pl, INITIATORNAME,
INITIAL_INITIATORNAME, PHASE_DECLARATIVE,
SCOPE_SESSION_WIDE, SENDER_INITIATOR,
TYPERANGE_ISCSINAME, USE_INITIAL_ONLY);
if (!param)
goto out;
param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS,
PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
TYPERANGE_UTF8, USE_ALL);
if (!param)
goto out;
param = iscsi_set_default_param(pl, INITIATORALIAS,
INITIAL_INITIATORALIAS, PHASE_DECLARATIVE,
SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8,
USE_ALL);
if (!param)
goto out;
param = iscsi_set_default_param(pl, TARGETADDRESS,
INITIAL_TARGETADDRESS, PHASE_DECLARATIVE,
SCOPE_SESSION_WIDE, SENDER_TARGET,
TYPERANGE_TARGETADDRESS, USE_ALL);
if (!param)
goto out;
param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG,
INITIAL_TARGETPORTALGROUPTAG,
PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
TYPERANGE_0_TO_65535, USE_INITIAL_ONLY);
if (!param)
goto out;
param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T,
PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
if (!param)
goto out;
param = iscsi_set_default_param(pl, IMMEDIATEDATA,
INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL,
SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND,
USE_LEADING_ONLY);
if (!param)
goto out;
param = iscsi_set_default_param(pl, MAXXMITDATASEGMENTLENGTH,
INITIAL_MAXXMITDATASEGMENTLENGTH,
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
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_MARKINT, USE_INITIAL_ONLY);
if (!param)
goto out;
param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT,
PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
TYPERANGE_MARKINT, 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 == false)
SET_PSTATE_NEGOTIATE(param);
} else if (!strcmp(param->name, DATADIGEST)) {
if (iser == false)
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 == false)
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_NEGOTIATE(param);
} else if (!strcmp(param->name, OFMARKER)) {
SET_PSTATE_NEGOTIATE(param);
} else if (!strcmp(param->name, IFMARKINT)) {
SET_PSTATE_NEGOTIATE(param);
} else if (!strcmp(param->name, OFMARKINT)) {
SET_PSTATE_NEGOTIATE(param);
} else if (!strcmp(param->name, RDMAEXTENSIONS)) {
if (iser == true)
SET_PSTATE_NEGOTIATE(param);
} else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {
if (iser == true)
SET_PSTATE_NEGOTIATE(param);
} else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {
if (iser == true)
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");
goto err_out;
}
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 -1;
}
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;
}
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 -1;
}
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)
{
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);
/*
* 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);
/*
* The GlobalSAN iSCSI Initiator for MacOSX does
* not respond to MaxBurstLength, FirstBurstLength,
* DefaultTime2Wait or DefaultTime2Retain parameter keys.
* So, we set them to 'reply optional' here, and assume the
* the defaults from iscsi_parameters.h if the initiator
* is not RFC compliant and the keys are not negotiated.
*/
if (!strcmp(param->name, MAXBURSTLENGTH))
SET_PSTATE_REPLY_OPTIONAL(param);
if (!strcmp(param->name, FIRSTBURSTLENGTH))
SET_PSTATE_REPLY_OPTIONAL(param);
if (!strcmp(param->name, DEFAULTTIME2WAIT))
SET_PSTATE_REPLY_OPTIONAL(param);
if (!strcmp(param->name, DEFAULTTIME2RETAIN))
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_numerical_range_value(struct iscsi_param *param, char *value)
{
char *left_val_ptr = NULL, *right_val_ptr = NULL;
char *tilde_ptr = NULL;
u32 left_val, right_val, local_left_val;
if (strcmp(param->name, IFMARKINT) &&
strcmp(param->name, OFMARKINT)) {
pr_err("Only parameters \"%s\" or \"%s\" may contain a"
" numerical range value.\n", IFMARKINT, OFMARKINT);
return -1;
}
if (IS_PSTATE_PROPOSER(param))
return 0;
tilde_ptr = strchr(value, '~');
if (!tilde_ptr) {
pr_err("Unable to locate numerical range indicator"
" \"~\" for \"%s\".\n", param->name);
return -1;
}
*tilde_ptr = '\0';
left_val_ptr = value;
right_val_ptr = value + strlen(left_val_ptr) + 1;
if (iscsi_check_numerical_value(param, left_val_ptr) < 0)
return -1;
if (iscsi_check_numerical_value(param, right_val_ptr) < 0)
return -1;
left_val = simple_strtoul(left_val_ptr, NULL, 0);
right_val = simple_strtoul(right_val_ptr, NULL, 0);
*tilde_ptr = '~';
if (right_val < left_val) {
pr_err("Numerical range for parameter \"%s\" contains"
" a right value which is less than the left.\n",
param->name);
return -1;
}
/*
* For now, enforce reasonable defaults for [I,O]FMarkInt.
*/
tilde_ptr = strchr(param->value, '~');
if (!tilde_ptr) {
pr_err("Unable to locate numerical range indicator"
" \"~\" for \"%s\".\n", param->name);
return -1;
}
*tilde_ptr = '\0';
left_val_ptr = param->value;
right_val_ptr = param->value + strlen(left_val_ptr) + 1;
local_left_val = simple_strtoul(left_val_ptr, NULL, 0);
*tilde_ptr = '~';
if (param->set_param) {
if ((left_val < local_left_val) ||
(right_val < local_left_val)) {
pr_err("Passed value range \"%u~%u\" is below"
" minimum left value \"%u\" for key \"%s\","
" rejecting.\n", left_val, right_val,
local_left_val, param->name);
return -1;
}
} else {
if ((left_val < local_left_val) &&
(right_val < local_left_val)) {
pr_err("Received value range \"%u~%u\" is"
" below minimum left value \"%u\" for key"
" \"%s\", rejecting.\n", left_val, right_val,
local_left_val, param->name);
SET_PSTATE_REJECT(param);
if (iscsi_update_param_value(param, REJECT) < 0)
return -1;
}
}
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;
}
/*
* This function is used to pick a value range number, currently just
* returns the lesser of both right values.
*/
static char *iscsi_get_value_from_number_range(
struct iscsi_param *param,
char *value)
{
char *end_ptr, *tilde_ptr1 = NULL, *tilde_ptr2 = NULL;
u32 acceptor_right_value, proposer_right_value;
tilde_ptr1 = strchr(value, '~');
if (!tilde_ptr1)
return NULL;
*tilde_ptr1++ = '\0';
proposer_right_value = simple_strtoul(tilde_ptr1, &end_ptr, 0);
tilde_ptr2 = strchr(param->value, '~');
if (!tilde_ptr2)
return NULL;
*tilde_ptr2++ = '\0';
acceptor_right_value = simple_strtoul(tilde_ptr2, &end_ptr, 0);
return (acceptor_right_value >= proposer_right_value) ?
tilde_ptr1 : tilde_ptr2;
}
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 *negoitated_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 = strict_strtoull(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_NUMBER_RANGE(param)) {
negoitated_value = iscsi_get_value_from_number_range(
param, value);
if (!negoitated_value)
return -1;
if (iscsi_update_param_value(param, negoitated_value) < 0)
return -1;
} else if (IS_TYPE_VALUE_LIST(param)) {
negoitated_value = iscsi_check_valuelist_for_support(
param, value);
if (!negoitated_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, negoitated_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_NUMBER_RANGE(param)) {
u32 left_val = 0, right_val = 0, recieved_value = 0;
char *left_val_ptr = NULL, *right_val_ptr = NULL;
char *tilde_ptr = NULL;
if (!strcmp(value, IRRELEVANT) || !strcmp(value, REJECT)) {
if (iscsi_update_param_value(param, value) < 0)
return -1;
return 0;
}
tilde_ptr = strchr(value, '~');
if (tilde_ptr) {
pr_err("Illegal \"~\" in response for \"%s\".\n",
param->name);
return -1;
}
tilde_ptr = strchr(param->value, '~');
if (!tilde_ptr) {
pr_err("Unable to locate numerical range"
" indicator \"~\" for \"%s\".\n", param->name);
return -1;
}
*tilde_ptr = '\0';
left_val_ptr = param->value;
right_val_ptr = param->value + strlen(left_val_ptr) + 1;
left_val = simple_strtoul(left_val_ptr, NULL, 0);
right_val = simple_strtoul(right_val_ptr, NULL, 0);
recieved_value = simple_strtoul(value, NULL, 0);
*tilde_ptr = '~';
if ((recieved_value < left_val) ||
(recieved_value > right_val)) {
pr_err("Illegal response \"%s=%u\", value must"
" be between %u and %u.\n", param->name,
recieved_value, left_val, right_val);
return -1;
}
} else 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_NUMBER_RANGE(param)) {
if (iscsi_check_numerical_range_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;
u8 IFMarker = 0, OFMarker = 0;
u8 IFMarkInt_Reject = 1, OFMarkInt_Reject = 1;
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);
if (!strcmp(param->name, IFMARKER))
if (!strcmp(param->value, YES))
IFMarker = 1;
if (!strcmp(param->name, OFMARKER))
if (!strcmp(param->value, YES))
OFMarker = 1;
if (!strcmp(param->name, IFMARKINT))
if (!strcmp(param->value, REJECT))
IFMarkInt_Reject = 1;
if (!strcmp(param->name, OFMARKINT))
if (!strcmp(param->value, REJECT))
OFMarkInt_Reject = 1;
}
list_for_each_entry(param, ¶m_list->param_list, p_list) {
if (!(param->phase & phase))
continue;
if (!SessionType && (!IS_PSTATE_ACCEPTOR(param) &&
(strcmp(param->name, IFMARKER) &&
strcmp(param->name, OFMARKER) &&
strcmp(param->name, IFMARKINT) &&
strcmp(param->name, OFMARKINT))))
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);
}
}
if (!strcmp(param->name, IFMARKER) && IFMarkInt_Reject) {
if (iscsi_update_param_value(param, NO) < 0)
return -1;
IFMarker = 0;
pr_debug("Reset \"%s\" to \"%s\".\n",
param->name, param->value);
}
if (!strcmp(param->name, OFMARKER) && OFMarkInt_Reject) {
if (iscsi_update_param_value(param, NO) < 0)
return -1;
OFMarker = 0;
pr_debug("Reset \"%s\" to \"%s\".\n",
param->name, param->value);
}
if (!strcmp(param->name, IFMARKINT) && !IFMarker) {
if (!strcmp(param->value, REJECT))
continue;
param->state &= ~PSTATE_NEGOTIATE;
if (iscsi_update_param_value(param, IRRELEVANT) < 0)
return -1;
pr_debug("Reset \"%s\" to \"%s\".\n",
param->name, param->value);
}
if (!strcmp(param->name, OFMARKINT) && !OFMarker) {
if (!strcmp(param->value, REJECT))
continue;
param->state &= ~PSTATE_NEGOTIATE;
if (iscsi_update_param_value(param, IRRELEVANT) < 0)
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 = kzalloc(length + 1, GFP_KERNEL);
if (!tmpbuf) {
pr_err("Unable to allocate memory for tmpbuf.\n");
return -1;
}
memcpy(tmpbuf, textbuf, length);
tmpbuf[length] = '\0';
start = tmpbuf;
end = (start + length);
while (start < end) {
char *key, *value;
struct iscsi_param *param;
if (iscsi_extract_key_value(start, &key, &value) < 0) {
kfree(tmpbuf);
return -1;
}
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) {
kfree(tmpbuf);
return -1;
}
start += strlen(key) + strlen(value) + 2;
continue;
}
if (iscsi_check_value(param, value) < 0) {
kfree(tmpbuf);
return -1;
}
start += strlen(key) + strlen(value) + 2;
if (IS_PSTATE_PROPOSER(param)) {
if (iscsi_check_proposer_state(param, value) < 0) {
kfree(tmpbuf);
return -1;
}
SET_PSTATE_RESPONSE_GOT(param);
} else {
if (iscsi_check_acceptor_state(param, value, conn) < 0) {
kfree(tmpbuf);
return -1;
}
SET_PSTATE_ACCEPTOR(param);
}
}
kfree(tmpbuf);
return 0;
}
int iscsi_encode_text_output(
u8 phase,
u8 sender,
char *textbuf,
u32 *length,
struct iscsi_param_list *param_list)
{
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);
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)) {
if (param_list->iser == true)
continue;
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, OFMARKER)) {
ops->OFMarker = !strcmp(param->value, YES);
pr_debug("OFMarker: %s\n",
param->value);
} else if (!strcmp(param->name, IFMARKER)) {
ops->IFMarker = !strcmp(param->value, YES);
pr_debug("IFMarker: %s\n",
param->value);
} else if (!strcmp(param->name, OFMARKINT)) {
ops->OFMarkInt =
simple_strtoul(param->value, &tmpptr, 0);
pr_debug("OFMarkInt: %s\n",
param->value);
} else if (!strcmp(param->name, IFMARKINT)) {
ops->IFMarkInt =
simple_strtoul(param->value, &tmpptr, 0);
pr_debug("IFMarkInt: %s\n",
param->value);
} 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");
}