Phonet: list subscribed resources via proc_fs (507215f8) · Commits · e / devices / android_kernel_xiaomi_markw

include/net/phonet/pn_dev.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -57,5 +57,6 @@ struct net_device phonet_route_output(struct net net, u8 daddr);
		#define PN_NO_ADDR 0xff

		extern const struct file_operations pn_sock_seq_fops;
		extern const struct file_operations pn_res_seq_fops;

		#endif

net/phonet/pn_dev.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -373,6 +373,7 @@ int __init phonet_device_init(void)
		if (err)
		return err;

		proc_net_fops_create(&init_net, "pnresource", 0, &pn_res_seq_fops);
		register_netdevice_notifier(&phonet_device_notifier);
		err = phonet_netlink_register();
		if (err)
		@@ -385,6 +386,7 @@ void phonet_device_exit(void)
		rtnl_unregister_all(PF_PHONET);
		unregister_netdevice_notifier(&phonet_device_notifier);
		unregister_pernet_device(&phonet_net_ops);
		proc_net_remove(&init_net, "pnresource");
		}

		int phonet_route_add(struct net_device *dev, u8 daddr)

net/phonet/socket.c

+96 −0

Original line number	Diff line number	Diff line
		@@ -654,3 +654,99 @@ void pn_sock_unbind_all_res(struct sock *sk)
		match--;
		}
		}

		#ifdef CONFIG_PROC_FS
		static struct sock *pn_res_get_idx(struct seq_file seq, loff_t pos)
		{
		struct net *net = seq_file_net(seq);
		unsigned i;

		if (!net_eq(net, &init_net))
		return NULL;

		for (i = 0; i < 256; i++) {
		if (pnres.sk[i] == NULL)
		continue;
		if (!pos)
		return pnres.sk + i;
		pos--;
		}
		return NULL;
		}

		static struct sock *pn_res_get_next(struct seq_file seq, struct sock **sk)
		{
		struct net *net = seq_file_net(seq);
		unsigned i;

		BUG_ON(!net_eq(net, &init_net));

		for (i = (sk - pnres.sk) + 1; i < 256; i++)
		if (pnres.sk[i])
		return pnres.sk + i;
		return NULL;
		}

		static void pn_res_seq_start(struct seq_file seq, loff_t *pos)
		__acquires(resource_mutex)
		{
		mutex_lock(&resource_mutex);
		return pos ? pn_res_get_idx(seq, pos - 1) : SEQ_START_TOKEN;
		}

		static void pn_res_seq_next(struct seq_file seq, void v, loff_t pos)
		{
		struct sock **sk;

		if (v == SEQ_START_TOKEN)
		sk = pn_res_get_idx(seq, 0);
		else
		sk = pn_res_get_next(seq, v);
		(*pos)++;
		return sk;
		}

		static void pn_res_seq_stop(struct seq_file seq, void v)
		__releases(resource_mutex)
		{
		mutex_unlock(&resource_mutex);
		}

		static int pn_res_seq_show(struct seq_file seq, void v)
		{
		int len;

		if (v == SEQ_START_TOKEN)
		seq_printf(seq, "%s%n", "rs uid inode", &len);
		else {
		struct sock **psk = v;
		struct sock sk = psk;

		seq_printf(seq, "%02X %5d %lu%n",
		psk - pnres.sk, sock_i_uid(sk), sock_i_ino(sk), &len);
		}
		seq_printf(seq, "%*s\n", 63 - len, "");
		return 0;
		}

		static const struct seq_operations pn_res_seq_ops = {
		.start = pn_res_seq_start,
		.next = pn_res_seq_next,
		.stop = pn_res_seq_stop,
		.show = pn_res_seq_show,
		};

		static int pn_res_open(struct inode inode, struct file file)
		{
		return seq_open_net(inode, file, &pn_res_seq_ops,
		sizeof(struct seq_net_private));
		}

		const struct file_operations pn_res_seq_fops = {
		.owner = THIS_MODULE,
		.open = pn_res_open,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = seq_release_net,
		};
		#endif