Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 	atalk_proc.c - proc support for Appletalk
 *
 * 	Copyright(c) Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 */
 
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <linux/atalk.h>
#include <linux/export.h>
 
 
static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
{
<------>struct atalk_iface *i;
 
<------>for (i = atalk_interfaces; pos && i; i = i->next)
<------><------>--pos;
 
<------>return i;
}
 
static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
<------>__acquires(atalk_interfaces_lock)
{
<------>loff_t l = *pos;
 
<------>read_lock_bh(&atalk_interfaces_lock);
<------>return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN;
}
 
static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
{
<------>struct atalk_iface *i;
 
<------>++*pos;
<------>if (v == SEQ_START_TOKEN) {
<------><------>i = NULL;
<------><------>if (atalk_interfaces)
<------><------><------>i = atalk_interfaces;
<------><------>goto out;
<------>}
<------>i = v;
<------>i = i->next;
out:
<------>return i;
}
 
static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
<------>__releases(atalk_interfaces_lock)
{
<------>read_unlock_bh(&atalk_interfaces_lock);
}
 
static int atalk_seq_interface_show(struct seq_file *seq, void *v)
{
<------>struct atalk_iface *iface;
 
<------>if (v == SEQ_START_TOKEN) {
<------><------>seq_puts(seq, "Interface        Address   Networks  "
<------><------><------>      "Status\n");
<------><------>goto out;
<------>}
 
<------>iface = v;
<------>seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
<------><------>   iface->dev->name, ntohs(iface->address.s_net),
<------><------>   iface->address.s_node, ntohs(iface->nets.nr_firstnet),
<------><------>   ntohs(iface->nets.nr_lastnet), iface->status);
out:
<------>return 0;
}
 
static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
{
<------>struct atalk_route *r;
 
<------>for (r = atalk_routes; pos && r; r = r->next)
<------><------>--pos;
 
<------>return r;
}
 
static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
<------>__acquires(atalk_routes_lock)
{
<------>loff_t l = *pos;
 
<------>read_lock_bh(&atalk_routes_lock);
<------>return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
}
 
static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
{
<------>struct atalk_route *r;
 
<------>++*pos;
<------>if (v == SEQ_START_TOKEN) {
<------><------>r = NULL;
<------><------>if (atalk_routes)
<------><------><------>r = atalk_routes;
<------><------>goto out;
<------>}
<------>r = v;
<------>r = r->next;
out:
<------>return r;
}
 
static void atalk_seq_route_stop(struct seq_file *seq, void *v)
<------>__releases(atalk_routes_lock)
{
<------>read_unlock_bh(&atalk_routes_lock);
}
 
static int atalk_seq_route_show(struct seq_file *seq, void *v)
{
<------>struct atalk_route *rt;
 
<------>if (v == SEQ_START_TOKEN) {
<------><------>seq_puts(seq, "Target        Router  Flags Dev\n");
<------><------>goto out;
<------>}
 
<------>if (atrtr_default.dev) {
<------><------>rt = &atrtr_default;
<------><------>seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
<------><------><------>       ntohs(rt->gateway.s_net), rt->gateway.s_node,
<------><------><------>       rt->flags, rt->dev->name);
<------>}
 
<------>rt = v;
<------>seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
<------><------>   ntohs(rt->target.s_net), rt->target.s_node,
<------><------>   ntohs(rt->gateway.s_net), rt->gateway.s_node,
<------><------>   rt->flags, rt->dev->name);
out:
<------>return 0;
}
 
static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
<------>__acquires(atalk_sockets_lock)
{
<------>read_lock_bh(&atalk_sockets_lock);
<------>return seq_hlist_start_head(&atalk_sockets, *pos);
}
 
static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
{
<------>return seq_hlist_next(v, &atalk_sockets, pos);
}
 
static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
<------>__releases(atalk_sockets_lock)
{
<------>read_unlock_bh(&atalk_sockets_lock);
}
 
static int atalk_seq_socket_show(struct seq_file *seq, void *v)
{
<------>struct sock *s;
<------>struct atalk_sock *at;
 
<------>if (v == SEQ_START_TOKEN) {
<------><------>seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
<------><------><------><------>"Rx_queue St UID\n");
<------><------>goto out;
<------>}
 
<------>s = sk_entry(v);
<------>at = at_sk(s);
 
<------>seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
<------><------><------>"%02X %u\n",
<------><------>   s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
<------><------>   ntohs(at->dest_net), at->dest_node, at->dest_port,
<------><------>   sk_wmem_alloc_get(s),
<------><------>   sk_rmem_alloc_get(s),
<------><------>   s->sk_state,
<------><------>   from_kuid_munged(seq_user_ns(seq), sock_i_uid(s)));
out:
<------>return 0;
}
 
static const struct seq_operations atalk_seq_interface_ops = {
<------>.start  = atalk_seq_interface_start,
<------>.next   = atalk_seq_interface_next,
<------>.stop   = atalk_seq_interface_stop,
<------>.show   = atalk_seq_interface_show,
};
 
static const struct seq_operations atalk_seq_route_ops = {
<------>.start  = atalk_seq_route_start,
<------>.next   = atalk_seq_route_next,
<------>.stop   = atalk_seq_route_stop,
<------>.show   = atalk_seq_route_show,
};
 
static const struct seq_operations atalk_seq_socket_ops = {
<------>.start  = atalk_seq_socket_start,
<------>.next   = atalk_seq_socket_next,
<------>.stop   = atalk_seq_socket_stop,
<------>.show   = atalk_seq_socket_show,
};
 
int __init atalk_proc_init(void)
{
<------>if (!proc_mkdir("atalk", init_net.proc_net))
<------><------>return -ENOMEM;
 
<------>if (!proc_create_seq("atalk/interface", 0444, init_net.proc_net,
<------><------><------>    &atalk_seq_interface_ops))
<------><------>goto out;
 
<------>if (!proc_create_seq("atalk/route", 0444, init_net.proc_net,
<------><------><------>    &atalk_seq_route_ops))
<------><------>goto out;
 
<------>if (!proc_create_seq("atalk/socket", 0444, init_net.proc_net,
<------><------><------>    &atalk_seq_socket_ops))
<------><------>goto out;
 
<------>if (!proc_create_seq_private("atalk/arp", 0444, init_net.proc_net,
<------><------><------><------>     &aarp_seq_ops,
<------><------><------><------>     sizeof(struct aarp_iter_state), NULL))
<------><------>goto out;
 
<------>return 0;
 
out:
<------>remove_proc_subtree("atalk", init_net.proc_net);
<------>return -ENOMEM;
}
 
void atalk_proc_exit(void)
{
<------>remove_proc_subtree("atalk", init_net.proc_net);
}