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linux/drivers/target/iscsi/iscsi_target_parameters.c
Azeem Shaikh 0871237a94 scsi: target: Replace all non-returning strlcpy() with strscpy() 
strlcpy() reads the entire source buffer first.  This read may exceed the
destination size limit.  This is both inefficient and can lead to linear
read overflows if a source string is not NUL-terminated [1].  In an effort
to remove strlcpy() completely [2], replace strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Link: https://lore.kernel.org/r/20230516025322.2804923-1-azeemshaikh38@gmail.com
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-05-16 21:39:44 -04:00

1718 lines
46 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/*******************************************************************************
* This file contains main functions related to iSCSI Parameter negotiation.
*
* (c) Copyright 2007-2013 Datera, Inc.
*
* Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
*
******************************************************************************/
#include <linux/slab.h>
#include <linux/uio.h> /* struct kvec */
#include <target/iscsi/iscsi_target_core.h>
#include "iscsi_target_util.h"
#include "iscsi_target_parameters.h"
int iscsi_login_rx_data(
struct iscsit_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;
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 iscsit_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++;
}
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);
}
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, &param_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(&param->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_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(&param->p_list, &param_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 -ENOMEM;
}
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_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, &param_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, &param_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(&param_list->param_list);
INIT_LIST_HEAD(&param_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, &param_list->param_list);
}
if (!list_empty(&param_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, &param_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, &param_list->param_list,
p_list) {
list_del(&param->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, &param_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);
strscpy(extra_response->key, key, sizeof(extra_response->key));
strscpy(extra_response->value, NOTUNDERSTOOD,
sizeof(extra_response->value));
list_add_tail(&extra_response->er_list,
&param_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 iscsit_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)) {
char *phase_name;
switch (phase) {
case PHASE_SECURITY:
phase_name = "Security";
break;
case PHASE_OPERATIONAL:
phase_name = "Operational";
break;
default:
phase_name = "Unknown";
}
pr_err("Key \"%s\" may not be negotiated during %s phase.\n",
param->name, phase_name);
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, &param_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, &param_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 iscsit_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, &param_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, &param_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, &param_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, &param_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, &param_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");
}
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