// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2019 Netronome Systems, Inc. */

#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/snmp.h>
#include <net/tls.h>

#include "tls.h"

#ifdef CONFIG_PROC_FS
static const struct snmp_mib tls_mib_list[] = {
        SNMP_MIB_ITEM("TlsCurrTxSw", LINUX_MIB_TLSCURRTXSW),
        SNMP_MIB_ITEM("TlsCurrRxSw", LINUX_MIB_TLSCURRRXSW),
        SNMP_MIB_ITEM("TlsCurrTxDevice", LINUX_MIB_TLSCURRTXDEVICE),
        SNMP_MIB_ITEM("TlsCurrRxDevice", LINUX_MIB_TLSCURRRXDEVICE),
        SNMP_MIB_ITEM("TlsTxSw", LINUX_MIB_TLSTXSW),
        SNMP_MIB_ITEM("TlsRxSw", LINUX_MIB_TLSRXSW),
        SNMP_MIB_ITEM("TlsTxDevice", LINUX_MIB_TLSTXDEVICE),
        SNMP_MIB_ITEM("TlsRxDevice", LINUX_MIB_TLSRXDEVICE),
        SNMP_MIB_ITEM("TlsDecryptError", LINUX_MIB_TLSDECRYPTERROR),
        SNMP_MIB_ITEM("TlsRxDeviceResync", LINUX_MIB_TLSRXDEVICERESYNC),
        SNMP_MIB_ITEM("TlsDecryptRetry", LINUX_MIB_TLSDECRYPTRETRY),
        SNMP_MIB_ITEM("TlsRxNoPadViolation", LINUX_MIB_TLSRXNOPADVIOL),
        SNMP_MIB_ITEM("TlsRxRekeyOk", LINUX_MIB_TLSRXREKEYOK),
        SNMP_MIB_ITEM("TlsRxRekeyError", LINUX_MIB_TLSRXREKEYERROR),
        SNMP_MIB_ITEM("TlsTxRekeyOk", LINUX_MIB_TLSTXREKEYOK),
        SNMP_MIB_ITEM("TlsTxRekeyError", LINUX_MIB_TLSTXREKEYERROR),
        SNMP_MIB_ITEM("TlsRxRekeyReceived", LINUX_MIB_TLSRXREKEYRECEIVED),
};

static int tls_statistics_seq_show(struct seq_file *seq, void *v)
{
        unsigned long buf[ARRAY_SIZE(tls_mib_list)];
        const int cnt = ARRAY_SIZE(tls_mib_list);
        struct net *net = seq->private;
        int i;

        memset(buf, 0, sizeof(buf));
        snmp_get_cpu_field_batch_cnt(buf, tls_mib_list, cnt,
                                     net->mib.tls_statistics);
        for (i = 0; i < cnt; i++)
                seq_printf(seq, "%-32s\t%lu\n", tls_mib_list[i].name, buf[i]);

        return 0;
}
#endif

int __net_init tls_proc_init(struct net *net)
{
#ifdef CONFIG_PROC_FS
        if (!proc_create_net_single("tls_stat", 0444, net->proc_net,
                                    tls_statistics_seq_show, NULL))
                return -ENOMEM;
#endif /* CONFIG_PROC_FS */

        return 0;
}

void __net_exit tls_proc_fini(struct net *net)
{
        remove_proc_entry("tls_stat", net->proc_net);
}