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0f7aedbdf2
linux-next/drivers/s390/net/qeth_core_sys.c
Julian Wiedmann 0f7aedbdf2 s390/qeth: drop redundant state checking 
Now that qeth always uses dev_close() to shutdown the interface, we can
trust the locking and remove some custom state checks.
qeth_l?_stop_card() is no longer called for a card in UP state, so remove
the checks there too. This basically makes the UP state obsolete, so rip
out the whole thing (except for the sysfs-visible string).

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-02-28 12:55:26 -08:00

765 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright IBM Corp. 2007
* Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
* Frank Pavlic <fpavlic@de.ibm.com>,
* Thomas Spatzier <tspat@de.ibm.com>,
* Frank Blaschka <frank.blaschka@de.ibm.com>
*/
#define KMSG_COMPONENT "qeth"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/list.h>
#include <linux/rwsem.h>
#include <asm/ebcdic.h>
#include "qeth_core.h"
static ssize_t qeth_dev_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
switch (card->state) {
case CARD_STATE_DOWN:
return sprintf(buf, "DOWN\n");
case CARD_STATE_HARDSETUP:
return sprintf(buf, "HARDSETUP\n");
case CARD_STATE_SOFTSETUP:
if (card->dev->flags & IFF_UP)
return sprintf(buf, "UP (LAN %s)\n",
netif_carrier_ok(card->dev) ? "ONLINE" :
"OFFLINE");
return sprintf(buf, "SOFTSETUP\n");
default:
return sprintf(buf, "UNKNOWN\n");
}
}
static DEVICE_ATTR(state, 0444, qeth_dev_state_show, NULL);
static ssize_t qeth_dev_chpid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%02X\n", card->info.chpid);
}
static DEVICE_ATTR(chpid, 0444, qeth_dev_chpid_show, NULL);
static ssize_t qeth_dev_if_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%s\n", QETH_CARD_IFNAME(card));
}
static DEVICE_ATTR(if_name, 0444, qeth_dev_if_name_show, NULL);
static ssize_t qeth_dev_card_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%s\n", qeth_get_cardname_short(card));
}
static DEVICE_ATTR(card_type, 0444, qeth_dev_card_type_show, NULL);
static const char *qeth_get_bufsize_str(struct qeth_card *card)
{
if (card->qdio.in_buf_size == 16384)
return "16k";
else if (card->qdio.in_buf_size == 24576)
return "24k";
else if (card->qdio.in_buf_size == 32768)
return "32k";
else if (card->qdio.in_buf_size == 40960)
return "40k";
else
return "64k";
}
static ssize_t qeth_dev_inbuf_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%s\n", qeth_get_bufsize_str(card));
}
static DEVICE_ATTR(inbuf_size, 0444, qeth_dev_inbuf_size_show, NULL);
static ssize_t qeth_dev_portno_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%i\n", card->dev->dev_port);
}
static ssize_t qeth_dev_portno_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
unsigned int portno, limit;
int rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
portno = simple_strtoul(buf, &tmp, 16);
if (portno > QETH_MAX_PORTNO) {
rc = -EINVAL;
goto out;
}
limit = (card->ssqd.pcnt ? card->ssqd.pcnt - 1 : card->ssqd.pcnt);
if (portno > limit) {
rc = -EINVAL;
goto out;
}
card->dev->dev_port = portno;
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(portno, 0644, qeth_dev_portno_show, qeth_dev_portno_store);
static ssize_t qeth_dev_portname_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "no portname required\n");
}
static ssize_t qeth_dev_portname_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
dev_warn_once(&card->gdev->dev,
"portname is deprecated and is ignored\n");
return count;
}
static DEVICE_ATTR(portname, 0644, qeth_dev_portname_show,
qeth_dev_portname_store);
static ssize_t qeth_dev_prioqing_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
switch (card->qdio.do_prio_queueing) {
case QETH_PRIO_Q_ING_PREC:
return sprintf(buf, "%s\n", "by precedence");
case QETH_PRIO_Q_ING_TOS:
return sprintf(buf, "%s\n", "by type of service");
case QETH_PRIO_Q_ING_SKB:
return sprintf(buf, "%s\n", "by skb-priority");
case QETH_PRIO_Q_ING_VLAN:
return sprintf(buf, "%s\n", "by VLAN headers");
default:
return sprintf(buf, "always queue %i\n",
card->qdio.default_out_queue);
}
}
static ssize_t qeth_dev_prioqing_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
int rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
/* check if 1920 devices are supported ,
* if though we have to permit priority queueing
*/
if (card->qdio.no_out_queues == 1) {
card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
rc = -EPERM;
goto out;
}
if (sysfs_streq(buf, "prio_queueing_prec")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_PREC;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (sysfs_streq(buf, "prio_queueing_skb")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_SKB;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (sysfs_streq(buf, "prio_queueing_tos")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_TOS;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (sysfs_streq(buf, "prio_queueing_vlan")) {
if (IS_LAYER3(card)) {
rc = -ENOTSUPP;
goto out;
}
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_VLAN;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (sysfs_streq(buf, "no_prio_queueing:0")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 0;
} else if (sysfs_streq(buf, "no_prio_queueing:1")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 1;
} else if (sysfs_streq(buf, "no_prio_queueing:2")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 2;
} else if (sysfs_streq(buf, "no_prio_queueing:3")) {
if (card->info.type == QETH_CARD_TYPE_IQD) {
rc = -EPERM;
goto out;
}
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 3;
} else if (sysfs_streq(buf, "no_prio_queueing")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else
rc = -EINVAL;
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(priority_queueing, 0644, qeth_dev_prioqing_show,
qeth_dev_prioqing_store);
static ssize_t qeth_dev_bufcnt_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%i\n", card->qdio.in_buf_pool.buf_count);
}
static ssize_t qeth_dev_bufcnt_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
int cnt, old_cnt;
int rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
old_cnt = card->qdio.in_buf_pool.buf_count;
cnt = simple_strtoul(buf, &tmp, 10);
cnt = (cnt < QETH_IN_BUF_COUNT_MIN) ? QETH_IN_BUF_COUNT_MIN :
((cnt > QETH_IN_BUF_COUNT_MAX) ? QETH_IN_BUF_COUNT_MAX : cnt);
if (old_cnt != cnt) {
rc = qeth_realloc_buffer_pool(card, cnt);
}
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(buffer_count, 0644, qeth_dev_bufcnt_show,
qeth_dev_bufcnt_store);
static ssize_t qeth_dev_recover_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
int i;
if (!card)
return -EINVAL;
if (!qeth_card_hw_is_reachable(card))
return -EPERM;
i = simple_strtoul(buf, &tmp, 16);
if (i == 1)
qeth_schedule_recovery(card);
return count;
}
static DEVICE_ATTR(recover, 0200, NULL, qeth_dev_recover_store);
static ssize_t qeth_dev_performance_stats_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "1\n");
}
static ssize_t qeth_dev_performance_stats_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
struct qeth_qdio_out_q *queue;
unsigned int i;
bool reset;
int rc;
if (!card)
return -EINVAL;
rc = kstrtobool(buf, &reset);
if (rc)
return rc;
if (reset) {
memset(&card->stats, 0, sizeof(card->stats));
for (i = 0; i < card->qdio.no_out_queues; i++) {
queue = card->qdio.out_qs[i];
if (!queue)
break;
memset(&queue->stats, 0, sizeof(queue->stats));
}
}
return count;
}
static DEVICE_ATTR(performance_stats, 0644, qeth_dev_performance_stats_show,
qeth_dev_performance_stats_store);
static ssize_t qeth_dev_layer2_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%i\n", card->options.layer);
}
static ssize_t qeth_dev_layer2_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
struct net_device *ndev;
char *tmp;
int i, rc = 0;
enum qeth_discipline_id newdis;
if (!card)
return -EINVAL;
mutex_lock(&card->discipline_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
i = simple_strtoul(buf, &tmp, 16);
switch (i) {
case 0:
newdis = QETH_DISCIPLINE_LAYER3;
break;
case 1:
newdis = QETH_DISCIPLINE_LAYER2;
break;
default:
rc = -EINVAL;
goto out;
}
if (card->options.layer == newdis)
goto out;
if (card->info.layer_enforced) {
/* fixed layer, can't switch */
rc = -EOPNOTSUPP;
goto out;
}
if (card->discipline) {
/* start with a new, pristine netdevice: */
ndev = qeth_clone_netdev(card->dev);
if (!ndev) {
rc = -ENOMEM;
goto out;
}
card->discipline->remove(card->gdev);
qeth_core_free_discipline(card);
free_netdev(card->dev);
card->dev = ndev;
}
rc = qeth_core_load_discipline(card, newdis);
if (rc)
goto out;
rc = card->discipline->setup(card->gdev);
if (rc)
qeth_core_free_discipline(card);
out:
mutex_unlock(&card->discipline_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(layer2, 0644, qeth_dev_layer2_show,
qeth_dev_layer2_store);
#define ATTR_QETH_ISOLATION_NONE ("none")
#define ATTR_QETH_ISOLATION_FWD ("forward")
#define ATTR_QETH_ISOLATION_DROP ("drop")
static ssize_t qeth_dev_isolation_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
switch (card->options.isolation) {
case ISOLATION_MODE_NONE:
return snprintf(buf, 6, "%s\n", ATTR_QETH_ISOLATION_NONE);
case ISOLATION_MODE_FWD:
return snprintf(buf, 9, "%s\n", ATTR_QETH_ISOLATION_FWD);
case ISOLATION_MODE_DROP:
return snprintf(buf, 6, "%s\n", ATTR_QETH_ISOLATION_DROP);
default:
return snprintf(buf, 5, "%s\n", "N/A");
}
}
static ssize_t qeth_dev_isolation_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
enum qeth_ipa_isolation_modes isolation;
int rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (card->info.type != QETH_CARD_TYPE_OSD &&
card->info.type != QETH_CARD_TYPE_OSX) {
rc = -EOPNOTSUPP;
dev_err(&card->gdev->dev, "Adapter does not "
"support QDIO data connection isolation\n");
goto out;
}
/* parse input into isolation mode */
if (sysfs_streq(buf, ATTR_QETH_ISOLATION_NONE)) {
isolation = ISOLATION_MODE_NONE;
} else if (sysfs_streq(buf, ATTR_QETH_ISOLATION_FWD)) {
isolation = ISOLATION_MODE_FWD;
} else if (sysfs_streq(buf, ATTR_QETH_ISOLATION_DROP)) {
isolation = ISOLATION_MODE_DROP;
} else {
rc = -EINVAL;
goto out;
}
rc = count;
/* defer IP assist if device is offline (until discipline->set_online)*/
card->options.prev_isolation = card->options.isolation;
card->options.isolation = isolation;
if (qeth_card_hw_is_reachable(card)) {
int ipa_rc = qeth_set_access_ctrl_online(card, 1);
if (ipa_rc != 0)
rc = ipa_rc;
}
out:
mutex_unlock(&card->conf_mutex);
return rc;
}
static DEVICE_ATTR(isolation, 0644, qeth_dev_isolation_show,
qeth_dev_isolation_store);
static ssize_t qeth_dev_switch_attrs_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
struct qeth_switch_info sw_info;
int rc = 0;
if (!card)
return -EINVAL;
if (!qeth_card_hw_is_reachable(card))
return sprintf(buf, "n/a\n");
rc = qeth_query_switch_attributes(card, &sw_info);
if (rc)
return rc;
if (!sw_info.capabilities)
rc = sprintf(buf, "unknown");
if (sw_info.capabilities & QETH_SWITCH_FORW_802_1)
rc = sprintf(buf, (sw_info.settings & QETH_SWITCH_FORW_802_1 ?
"[802.1]" : "802.1"));
if (sw_info.capabilities & QETH_SWITCH_FORW_REFL_RELAY)
rc += sprintf(buf + rc,
(sw_info.settings & QETH_SWITCH_FORW_REFL_RELAY ?
" [rr]" : " rr"));
rc += sprintf(buf + rc, "\n");
return rc;
}
static DEVICE_ATTR(switch_attrs, 0444,
qeth_dev_switch_attrs_show, NULL);
static ssize_t qeth_hw_trap_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
if (card->info.hwtrap)
return snprintf(buf, 5, "arm\n");
else
return snprintf(buf, 8, "disarm\n");
}
static ssize_t qeth_hw_trap_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
int rc = 0;
int state = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (qeth_card_hw_is_reachable(card))
state = 1;
if (sysfs_streq(buf, "arm") && !card->info.hwtrap) {
if (state) {
if (qeth_is_diagass_supported(card,
QETH_DIAGS_CMD_TRAP)) {
rc = qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM);
if (!rc)
card->info.hwtrap = 1;
} else
rc = -EINVAL;
} else
card->info.hwtrap = 1;
} else if (sysfs_streq(buf, "disarm") && card->info.hwtrap) {
if (state) {
rc = qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
if (!rc)
card->info.hwtrap = 0;
} else
card->info.hwtrap = 0;
} else if (sysfs_streq(buf, "trap") && state && card->info.hwtrap)
rc = qeth_hw_trap(card, QETH_DIAGS_TRAP_CAPTURE);
else
rc = -EINVAL;
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(hw_trap, 0644, qeth_hw_trap_show,
qeth_hw_trap_store);
static ssize_t qeth_dev_blkt_show(char *buf, struct qeth_card *card, int value)
{
if (!card)
return -EINVAL;
return sprintf(buf, "%i\n", value);
}
static ssize_t qeth_dev_blkt_store(struct qeth_card *card,
const char *buf, size_t count, int *value, int max_value)
{
char *tmp;
int i, rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
i = simple_strtoul(buf, &tmp, 10);
if (i <= max_value)
*value = i;
else
rc = -EINVAL;
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static ssize_t qeth_dev_blkt_total_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_show(buf, card, card->info.blkt.time_total);
}
static ssize_t qeth_dev_blkt_total_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_store(card, buf, count,
&card->info.blkt.time_total, 5000);
}
static DEVICE_ATTR(total, 0644, qeth_dev_blkt_total_show,
qeth_dev_blkt_total_store);
static ssize_t qeth_dev_blkt_inter_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_show(buf, card, card->info.blkt.inter_packet);
}
static ssize_t qeth_dev_blkt_inter_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_store(card, buf, count,
&card->info.blkt.inter_packet, 1000);
}
static DEVICE_ATTR(inter, 0644, qeth_dev_blkt_inter_show,
qeth_dev_blkt_inter_store);
static ssize_t qeth_dev_blkt_inter_jumbo_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_show(buf, card,
card->info.blkt.inter_packet_jumbo);
}
static ssize_t qeth_dev_blkt_inter_jumbo_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_store(card, buf, count,
&card->info.blkt.inter_packet_jumbo, 1000);
}
static DEVICE_ATTR(inter_jumbo, 0644, qeth_dev_blkt_inter_jumbo_show,
qeth_dev_blkt_inter_jumbo_store);
static struct attribute *qeth_blkt_device_attrs[] = {
&dev_attr_total.attr,
&dev_attr_inter.attr,
&dev_attr_inter_jumbo.attr,
NULL,
};
const struct attribute_group qeth_device_blkt_group = {
.name = "blkt",
.attrs = qeth_blkt_device_attrs,
};
EXPORT_SYMBOL_GPL(qeth_device_blkt_group);
static struct attribute *qeth_device_attrs[] = {
&dev_attr_state.attr,
&dev_attr_chpid.attr,
&dev_attr_if_name.attr,
&dev_attr_card_type.attr,
&dev_attr_inbuf_size.attr,
&dev_attr_portno.attr,
&dev_attr_portname.attr,
&dev_attr_priority_queueing.attr,
&dev_attr_buffer_count.attr,
&dev_attr_recover.attr,
&dev_attr_performance_stats.attr,
&dev_attr_layer2.attr,
&dev_attr_isolation.attr,
&dev_attr_hw_trap.attr,
&dev_attr_switch_attrs.attr,
NULL,
};
const struct attribute_group qeth_device_attr_group = {
.attrs = qeth_device_attrs,
};
EXPORT_SYMBOL_GPL(qeth_device_attr_group);
const struct attribute_group *qeth_generic_attr_groups[] = {
&qeth_device_attr_group,
&qeth_device_blkt_group,
NULL,
};
static struct attribute *qeth_osn_device_attrs[] = {
&dev_attr_state.attr,
&dev_attr_chpid.attr,
&dev_attr_if_name.attr,
&dev_attr_card_type.attr,
&dev_attr_buffer_count.attr,
&dev_attr_recover.attr,
NULL,
};
static struct attribute_group qeth_osn_device_attr_group = {
.attrs = qeth_osn_device_attrs,
};
const struct attribute_group *qeth_osn_attr_groups[] = {
&qeth_osn_device_attr_group,
NULL,
};
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