[LTP] [PATCH v2 1/2] fsetxattr02: Adapt test for kernel 7.1.0+ socket xattr support

[Jan Polensky]

Starting with kernel 7.1.0, sockets support extended attributes in the
user.* namespace. This behavior was enabled by dc0876b9846d ("xattr: support
extended attributes on sockets"), which permits user.* xattrs on S_IFSOCK
inodes (previously rejected with -EPERM).

Adapts the test to expect success (exp_err = 0) instead of EPERM when
testing fsetxattr(2) on sockets with kernel 7.1.0+.

Signed-off-by: Jan Polensky <japo@linux.ibm.com>
---
 testcases/kernel/syscalls/fsetxattr/fsetxattr02.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/testcases/kernel/syscalls/fsetxattr/fsetxattr02.c b/testcases/kernel/syscalls/fsetxattr/fsetxattr02.c
index 18490a865871..335a8868ac73 100644
--- a/testcases/kernel/syscalls/fsetxattr/fsetxattr02.c
+++ b/testcases/kernel/syscalls/fsetxattr/fsetxattr02.c
@@ -19,7 +19,8 @@
  * - Set attribute to a block special file, fsetxattr(2) should
  *   return -1 and set errno to EPERM.
  * - Set attribute to a UNIX domain socket, fsetxattr(2) should
- *   return -1 and set errno to EPERM.
+ *   return -1 and set errno to EPERM. Will SUCCEED on kernel
+ *   with commit dc0876b9846d.
  */
 
 /*
@@ -158,6 +159,10 @@ static void verify_fsetxattr(unsigned int i)
 	if (TST_RET == -1 && TST_ERR == EOPNOTSUPP)
 		tst_brk(TCONF, "fsetxattr(2) not supported");
 
+	/* consider kernels with commit dc0876b9846d */
+	if ((tst_kvercmp(7, 1, 0) >= 0) && (strncmp(tc[i].fname, SOCK, strlen(SOCK)) == 0))
+		tc[i].exp_err = 0;
+
 	/* success */
 
 	if (!tc[i].exp_err) {
-- 
2.53.0