/*
 **************************************************************************
 * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
 *
 * Permission to use, copy, modify, and/or distribute this software for
 * any purpose with or without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 **************************************************************************
 */

#include "nss_stats.h"
#include "nss_core.h"
#include <nss_ipv4.h>
#include "nss_strings.h"

/*
 * nss_ipv4_strings_exception_stats
 *	Interface statistics strings for ipv4 exceptions.
 */
struct nss_stats_info nss_ipv4_strings_exception_stats[NSS_IPV4_EXCEPTION_EVENT_MAX] = {
	{"icmp_hdr_incomplete"			, NSS_STATS_TYPE_EXCEPTION},
	{"icmp_unhandled_type"			, NSS_STATS_TYPE_EXCEPTION},
	{"icmp_ipv4_hdr_incomplete"		, NSS_STATS_TYPE_EXCEPTION},
	{"icmp_ipv4_udp_hdr_incomplete"		, NSS_STATS_TYPE_EXCEPTION},
	{"icmp_ipv4_tcp_header_incomplete"	, NSS_STATS_TYPE_EXCEPTION},
	{"icmp_sipv4_unknown_protocol"		, NSS_STATS_TYPE_EXCEPTION},
	{"icmp_no_icme"				, NSS_STATS_TYPE_EXCEPTION},
	{"icmp_flush_to_host"			, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_header_incomplete"		, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_no_icme"				, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_ip_option"			, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_ip_fragment"			, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_small_ttl"			, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_needs_fragmentation"		, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_flags"				, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_seq_exceeds_right_edge"		, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_small_data_offs"			, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_bad_sack"				, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_big_data_offs"			, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_seq_before_left_edge"		, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_ack_exceeds_right_edge"		, NSS_STATS_TYPE_EXCEPTION},
	{"tcp_ack_before_left_edge"		, NSS_STATS_TYPE_EXCEPTION},
	{"udp_header_incomplete"		, NSS_STATS_TYPE_EXCEPTION},
	{"udp_no_icme"				, NSS_STATS_TYPE_EXCEPTION},
	{"udp_ip_option"			, NSS_STATS_TYPE_EXCEPTION},
	{"udp_ip_fragment"			, NSS_STATS_TYPE_EXCEPTION},
	{"udp_small_ttl"			, NSS_STATS_TYPE_EXCEPTION},
	{"udp_needs_fragmentation"		, NSS_STATS_TYPE_EXCEPTION},
	{"wrong_target_mac"			, NSS_STATS_TYPE_EXCEPTION},
	{"header_incomplete"			, NSS_STATS_TYPE_EXCEPTION},
	{"bad_total_length"			, NSS_STATS_TYPE_EXCEPTION},
	{"bad_checksum"				, NSS_STATS_TYPE_EXCEPTION},
	{"non_initial_fragment"			, NSS_STATS_TYPE_EXCEPTION},
	{"datagram_incomplete"			, NSS_STATS_TYPE_EXCEPTION},
	{"options_incomplete"			, NSS_STATS_TYPE_EXCEPTION},
	{"unknown_protocol"			, NSS_STATS_TYPE_EXCEPTION},
	{"esp_header_incomplete"		, NSS_STATS_TYPE_EXCEPTION},
	{"esp_no_icme"				, NSS_STATS_TYPE_EXCEPTION},
	{"esp_ip_option"			, NSS_STATS_TYPE_EXCEPTION},
	{"esp_ip_fragment"			, NSS_STATS_TYPE_EXCEPTION},
	{"esp_small_ttl"			, NSS_STATS_TYPE_EXCEPTION},
	{"esp_needs_fragmentation"		, NSS_STATS_TYPE_EXCEPTION},
	{"ingress_vid_mismatch"			, NSS_STATS_TYPE_EXCEPTION},
	{"ingress_vid_missing"			, NSS_STATS_TYPE_EXCEPTION},
	{"6rd_no_icme"				, NSS_STATS_TYPE_EXCEPTION},
	{"6rd_ip_option"			, NSS_STATS_TYPE_EXCEPTION},
	{"6rd_ip_fragment"			, NSS_STATS_TYPE_EXCEPTION},
	{"6rd_needs_fragmentation"		, NSS_STATS_TYPE_EXCEPTION},
	{"dscp_marking_mismatch"		, NSS_STATS_TYPE_EXCEPTION},
	{"vlan_marking_mismatch"		, NSS_STATS_TYPE_EXCEPTION},
	{"interface_mismatch"			, NSS_STATS_TYPE_EXCEPTION},
	{"gre_header_incomplete"		, NSS_STATS_TYPE_EXCEPTION},
	{"gre_no_icme"				, NSS_STATS_TYPE_EXCEPTION},
	{"gre_ip_option"			, NSS_STATS_TYPE_EXCEPTION},
	{"gre_ip_fragment"			, NSS_STATS_TYPE_EXCEPTION},
	{"gre_small_ttl"			, NSS_STATS_TYPE_EXCEPTION},
	{"gre_needs_fragmentation"		, NSS_STATS_TYPE_EXCEPTION},
	{"pptp_gre_session_match_fail"		, NSS_STATS_TYPE_EXCEPTION},
	{"pptp_gre_invalid_proto"		, NSS_STATS_TYPE_EXCEPTION},
	{"pptp_gre_no_cme"			, NSS_STATS_TYPE_EXCEPTION},
	{"pptp_gre_ip_option"			, NSS_STATS_TYPE_EXCEPTION},
	{"pptp_gre_ip_fragment"			, NSS_STATS_TYPE_EXCEPTION},
	{"pptp_gre_small_ttl"			, NSS_STATS_TYPE_EXCEPTION},
	{"pptp_gre_needs_fragmentation"		, NSS_STATS_TYPE_EXCEPTION},
	{"destroy"				, NSS_STATS_TYPE_EXCEPTION},
	{"frag_df_set"				, NSS_STATS_TYPE_EXCEPTION},
	{"frag_fail"				, NSS_STATS_TYPE_EXCEPTION},
	{"icmp_ipv4_udplite_header_incomplete"	, NSS_STATS_TYPE_EXCEPTION},
	{"udplite_header_incomplete"		, NSS_STATS_TYPE_EXCEPTION},
	{"udplite_no_icme"			, NSS_STATS_TYPE_EXCEPTION},
	{"udplite_ip_option"			, NSS_STATS_TYPE_EXCEPTION},
	{"udplite_ip_fragment"			, NSS_STATS_TYPE_EXCEPTION},
	{"udplite_small_ttl"			, NSS_STATS_TYPE_EXCEPTION},
	{"udplite_needs_fragmentation"		, NSS_STATS_TYPE_EXCEPTION},
	{"mc_udp_no_icme"			, NSS_STATS_TYPE_EXCEPTION},
	{"mc_mem_alloc_failure"			, NSS_STATS_TYPE_EXCEPTION},
	{"mc_update_failure"			, NSS_STATS_TYPE_EXCEPTION},
	{"mc_pbuf_alloc_failure"		, NSS_STATS_TYPE_EXCEPTION},
	{"pppoe_bridge_no_icme"			, NSS_STATS_TYPE_EXCEPTION},
	{"pppoe_no_session"			, NSS_STATS_TYPE_DROP},
	{"icmp_ipv4_gre_hdr_incomplete"		, NSS_STATS_TYPE_EXCEPTION},
	{"icmp_ipv4_esp_hdr_incomplete"		, NSS_STATS_TYPE_EXCEPTION},
	{"emesh_prio_mismatch"			, NSS_STATS_TYPE_EXCEPTION},
	{"mc_ucast_dmac_failure"		, NSS_STATS_TYPE_EXCEPTION},
};

/*
 * nss_ipv4_strings_stats
 *	IPv4 statistics strings.
 */
struct nss_stats_info nss_ipv4_strings_stats[NSS_IPV4_STATS_MAX] = {
	{"rx_pkts"			, NSS_STATS_TYPE_SPECIAL},
	{"rx_bytes"			, NSS_STATS_TYPE_SPECIAL},
	{"tx_pkts"			, NSS_STATS_TYPE_SPECIAL},
	{"tx_bytes"			, NSS_STATS_TYPE_SPECIAL},
	{"create_requests"		, NSS_STATS_TYPE_SPECIAL},
	{"create_collisions"		, NSS_STATS_TYPE_SPECIAL},
	{"create_invalid_interface"	, NSS_STATS_TYPE_SPECIAL},
	{"destroy_requests"		, NSS_STATS_TYPE_SPECIAL},
	{"destroy_misses"		, NSS_STATS_TYPE_SPECIAL},
	{"hash_hits"			, NSS_STATS_TYPE_SPECIAL},
	{"hash_reorders"		, NSS_STATS_TYPE_SPECIAL},
	{"flushes"			, NSS_STATS_TYPE_SPECIAL},
	{"evictions"			, NSS_STATS_TYPE_SPECIAL},
	{"fragmentations"		, NSS_STATS_TYPE_SPECIAL},
	{"by_rule_drops"		, NSS_STATS_TYPE_DROP},
	{"mc_create_requests"		, NSS_STATS_TYPE_SPECIAL},
	{"mc_update_requests"		, NSS_STATS_TYPE_SPECIAL},
	{"mc_create_invalid_interface"	, NSS_STATS_TYPE_SPECIAL},
	{"mc_destroy_requests"		, NSS_STATS_TYPE_SPECIAL},
	{"mc_destroy_misses"		, NSS_STATS_TYPE_SPECIAL},
	{"mc_flushes"			, NSS_STATS_TYPE_SPECIAL},
	{"mirror_invalid_ifnum_conn_create_req"		, NSS_STATS_TYPE_SPECIAL},
	{"mirror_invalid_iftype_conn_create_req"	, NSS_STATS_TYPE_SPECIAL},
	{"mirror_failures"		, NSS_STATS_TYPE_SPECIAL},
};

/*
 * nss_ipv4_special_stats_strings_read()
 *	Read IPV4 special node statistics names.
 */
static ssize_t nss_ipv4_special_stats_strings_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos)
{
	return nss_strings_print(ubuf, sz, ppos, nss_ipv4_strings_stats, NSS_IPV4_STATS_MAX);
}

/*
 * nss_ipv4_exception_stats_strings_read()
 *	Read IPV4 exception statistics names.
 */
static ssize_t nss_ipv4_exception_stats_strings_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos)
{
	return nss_strings_print(ubuf, sz, ppos, nss_ipv4_strings_exception_stats, NSS_IPV4_EXCEPTION_EVENT_MAX);
}

/*
 * nss_ipv4_special_stats_strings_ops
 */
NSS_STRINGS_DECLARE_FILE_OPERATIONS(ipv4_special_stats);

/*
 * nss_ipv4_exception_stats_strings_ops
 */
NSS_STRINGS_DECLARE_FILE_OPERATIONS(ipv4_exception_stats);

/*
 * nss_ipv4_strings_dentry_create()
 *      Create IPv4 statistics strings debug entry.
 */
void nss_ipv4_strings_dentry_create(void)
{
	struct dentry *dir_d;
	struct dentry *file_d;

	if (!nss_top_main.strings_dentry) {
		nss_warning("qca-nss-drv/strings is not present");
		return;
	}

	dir_d = debugfs_create_dir("ipv4", nss_top_main.strings_dentry);
	if (!dir_d) {
		nss_warning("Failed to create qca-nss-drv/strings/ipv4 directory");
		return;
	}

	file_d = debugfs_create_file("special_stats_str", 0400, dir_d, &nss_top_main, &nss_ipv4_special_stats_strings_ops);
	if (!file_d) {
		nss_warning("Failed to create qca-nss-drv/stats/ipv4/special_stats_str file");
		goto fail;
	}

	file_d = debugfs_create_file("exception_stats_str", 0400, dir_d, &nss_top_main, &nss_ipv4_exception_stats_strings_ops);
	if (!file_d) {
		nss_warning("Failed to create qca-nss-drv/stats/ipv4/exception_stats_str file");
		goto fail;
	}

	return;
fail:
	debugfs_remove_recursive(dir_d);
}