v4.19.13 snapshot.
diff --git a/net/appletalk/atalk_proc.c b/net/appletalk/atalk_proc.c
new file mode 100644
index 0000000..8006295
--- /dev/null
+++ b/net/appletalk/atalk_proc.c
@@ -0,0 +1,265 @@
+/*
+ * atalk_proc.c - proc support for Appletalk
+ *
+ * Copyright(c) Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, version 2.
+ */
+
+#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,
+};
+
+static struct proc_dir_entry *atalk_proc_dir;
+
+int __init atalk_proc_init(void)
+{
+ struct proc_dir_entry *p;
+ int rc = -ENOMEM;
+
+ atalk_proc_dir = proc_mkdir("atalk", init_net.proc_net);
+ if (!atalk_proc_dir)
+ goto out;
+
+ p = proc_create_seq("interface", 0444, atalk_proc_dir,
+ &atalk_seq_interface_ops);
+ if (!p)
+ goto out_interface;
+
+ p = proc_create_seq("route", 0444, atalk_proc_dir,
+ &atalk_seq_route_ops);
+ if (!p)
+ goto out_route;
+
+ p = proc_create_seq("socket", 0444, atalk_proc_dir,
+ &atalk_seq_socket_ops);
+ if (!p)
+ goto out_socket;
+
+ p = proc_create_seq_private("arp", 0444, atalk_proc_dir, &aarp_seq_ops,
+ sizeof(struct aarp_iter_state), NULL);
+ if (!p)
+ goto out_arp;
+
+ rc = 0;
+out:
+ return rc;
+out_arp:
+ remove_proc_entry("socket", atalk_proc_dir);
+out_socket:
+ remove_proc_entry("route", atalk_proc_dir);
+out_route:
+ remove_proc_entry("interface", atalk_proc_dir);
+out_interface:
+ remove_proc_entry("atalk", init_net.proc_net);
+ goto out;
+}
+
+void __exit atalk_proc_exit(void)
+{
+ remove_proc_entry("interface", atalk_proc_dir);
+ remove_proc_entry("route", atalk_proc_dir);
+ remove_proc_entry("socket", atalk_proc_dir);
+ remove_proc_entry("arp", atalk_proc_dir);
+ remove_proc_entry("atalk", init_net.proc_net);
+}