testsuite: Do not provide finit_module(2) on older kernels

If the test's uname -r is less that 3.8, return -ENOSYS from
finit_module(), so that the fallback is tested.

diff --git a/testsuite/init_module.c b/testsuite/init_module.c
index 42177e7..269a471 100644 (file)
--- a/testsuite/init_module.c
+++ b/testsuite/init_module.c
@@ -37,6 +37,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/syscall.h>
+#include <sys/utsname.h>
 #include <unistd.h>
 
 /* kmod_elf_get_section() is not exported, we need the private header */
@@ -280,6 +281,25 @@ long init_module(void *mem, unsigned long len, const char *args)
        return err;
 }
 
+static int check_kernel_version(int major, int minor)
+{
+       struct utsname u;
+       const char *p;
+       int maj = 0, min = 0;
+
+       if (uname(&u) < 0)
+               return false;
+       for (p = u.release; *p >= '0' && *p <= '9'; p++)
+               maj = maj * 10 + *p - '0';
+       if (*p == '.')
+               for (p++; *p >= '0' && *p <= '9'; p++)
+                       min = min * 10 + *p - '0';
+       if (maj > major || (maj == major && min >= minor))
+               return true;
+       return false;
+}
+
+
 TS_EXPORT int finit_module(const int fd, const char *args, const int flags);
 
 int finit_module(const int fd, const char *args, const int flags)
@@ -289,6 +309,10 @@ int finit_module(const int fd, const char *args, const int flags)
        unsigned long len;
        struct stat st;
 
+       if (!check_kernel_version(3, 8)) {
+               errno = ENOSYS;
+               return -1;
+       }
        if (fstat(fd, &st) < 0)
                return -1;