net: Allow to show socket-specific information in /proc/[pid]/fdinfo/[fd] (b4653342) · Commits · 戴 / test

include/linux/net.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -171,6 +171,7 @@ struct proto_ops {
		int (compat_getsockopt)(struct socket sock, int level,
		int optname, char __user optval, int __user optlen);
		#endif
		void (show_fdinfo)(struct seq_file m, struct socket *sock);
		int (sendmsg) (struct socket sock, struct msghdr *m,
		size_t total_len);
		/* Notes for implementing recvmsg:

+12 −0

Original line number	Diff line number	Diff line
		@@ -128,6 +128,7 @@ static ssize_t sock_sendpage(struct file file, struct page page,
		static ssize_t sock_splice_read(struct file file, loff_t ppos,
		struct pipe_inode_info *pipe, size_t len,
		unsigned int flags);
		static void sock_show_fdinfo(struct seq_file m, struct file f);

		/*
		* Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
		@@ -150,6 +151,9 @@ static const struct file_operations socket_file_ops = {
		.sendpage = sock_sendpage,
		.splice_write = generic_splice_sendpage,
		.splice_read = sock_splice_read,
		#ifdef CONFIG_PROC_FS
		.show_fdinfo = sock_show_fdinfo,
		#endif
		};

		/*
		@@ -993,6 +997,14 @@ static ssize_t sock_write_iter(struct kiocb iocb, struct iov_iter from)
		return res;
		}

		static void sock_show_fdinfo(struct seq_file m, struct file f)
		{
		struct socket *sock = f->private_data;

		if (sock->ops->show_fdinfo)
		sock->ops->show_fdinfo(m, sock);
		}

		/*
		* Atomic setting of ioctl hooks to avoid race
		* with module unload.