Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 265 insertions, 0 deletions

diff --git a/net/appletalk/atalk_proc.c b/net/appletalk/atalk_proc.c
new file mode 100644
index 000000000..dda73991b
--- /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 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);
+}