linux-kernel - [PATCH 10/11] tools headers: Sync linux/socket.h with kernel sources

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Message-ID: <20251222225716.3565649-10-namhyung@kernel.org>
Date: Mon, 22 Dec 2025 14:57:15 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Ian Rogers <irogers@...gle.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	James Clark <james.clark@...aro.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH 10/11] tools headers: Sync linux/socket.h with kernel sources

To pick up changes from:

  d73c167708739137 ("socket: Split out a getsockname helper for io_uring")
  4677e78800bbde62 ("socket: Unify getsockname and getpeername implementation")
  bf33247a90d3e85d ("net: Add struct sockaddr_unsized for sockaddr of unknown length")

This should be used to beautify socket syscall arguments and it addresses
these tools/perf build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/perf/trace/beauty/include/linux/socket.h include/linux/socket.h

Please see tools/include/README.kernel-copies.

Cc: netdev@...r.kernel.org
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 .../perf/trace/beauty/include/linux/socket.h  | 24 ++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/tools/perf/trace/beauty/include/linux/socket.h b/tools/perf/trace/beauty/include/linux/socket.h
index 77d7c59f5d8b1cb2..ec715ad4bf25f5f7 100644
--- a/tools/perf/trace/beauty/include/linux/socket.h
+++ b/tools/perf/trace/beauty/include/linux/socket.h
@@ -32,11 +32,29 @@ typedef __kernel_sa_family_t	sa_family_t;
  *	1003.1g requires sa_family_t and that sa_data is char.
  */
 
+/* Deprecated for in-kernel use. Use struct sockaddr_unsized instead. */
 struct sockaddr {
 	sa_family_t	sa_family;	/* address family, AF_xxx	*/
 	char		sa_data[14];	/* 14 bytes of protocol address	*/
 };
 
+/**
+ * struct sockaddr_unsized - Unspecified size sockaddr for callbacks
+ * @sa_family: Address family (AF_UNIX, AF_INET, AF_INET6, etc.)
+ * @sa_data: Flexible array for address data
+ *
+ * This structure is designed for callback interfaces where the
+ * total size is known via the sockaddr_len parameter. Unlike struct
+ * sockaddr which has a fixed 14-byte sa_data limit or struct
+ * sockaddr_storage which has a fixed 128-byte sa_data limit, this
+ * structure can accommodate addresses of any size, but must be used
+ * carefully.
+ */
+struct sockaddr_unsized {
+	__kernel_sa_family_t	sa_family;	/* address family, AF_xxx */
+	char			sa_data[];	/* flexible address data */
+};
+
 struct linger {
 	int		l_onoff;	/* Linger active		*/
 	int		l_linger;	/* How long to linger for	*/
@@ -450,10 +468,10 @@ extern int __sys_connect(int fd, struct sockaddr __user *uservaddr,
 			 int addrlen);
 extern int __sys_listen(int fd, int backlog);
 extern int __sys_listen_socket(struct socket *sock, int backlog);
+extern int do_getsockname(struct socket *sock, int peer,
+			  struct sockaddr __user *usockaddr, int __user *usockaddr_len);
 extern int __sys_getsockname(int fd, struct sockaddr __user *usockaddr,
-			     int __user *usockaddr_len);
-extern int __sys_getpeername(int fd, struct sockaddr __user *usockaddr,
-			     int __user *usockaddr_len);
+			     int __user *usockaddr_len, int peer);
 extern int __sys_socketpair(int family, int type, int protocol,
 			    int __user *usockvec);
 extern int __sys_shutdown_sock(struct socket *sock, int how);
-- 
2.52.0.351.gbe84eed79e-goog