Use ENOTSUP if OS doesn't support blkdev page cache invalidation

[fio.git] / os / os-freebsd.h

diff --git a/os/os-freebsd.h b/os/os-freebsd.h
index aa90954dc6497b54ef841cce82635847b5c354d9..c7863b5e02eb5b978f266cc5d9329827c1819aca 100644 (file)
--- a/os/os-freebsd.h
+++ b/os/os-freebsd.h
@@ -22,9 +22,7 @@
 #define FIO_HAVE_TRIM
 #define FIO_HAVE_GETTID
 #define FIO_HAVE_CPU_AFFINITY
-/* Only have attach-to-open-removed when kern.ipc.shm_allow_removed is 1 */
-#undef  FIO_HAVE_SHM_ATTACH_REMOVED
-
+#define FIO_HAVE_SHM_ATTACH_REMOVED
 
 #define OS_MAP_ANON            MAP_ANON
 
@@ -84,7 +82,7 @@ static inline int chardev_size(struct fio_file *f, unsigned long long *bytes)
 
 static inline int blockdev_invalidate_cache(struct fio_file *f)
 {
-       return EINVAL;
+       return ENOTSUP;
 }
 
 static inline unsigned long long os_phys_mem(void)
@@ -136,4 +134,15 @@ static inline int os_trim(int fd, unsigned long long start,
 #define FIO_MADV_FREE  MADV_FREE
 #endif
 
+static inline int shm_attach_to_open_removed(void)
+{
+       int x;
+       size_t len = sizeof(x);
+
+       if (sysctlbyname("kern.ipc.shm_allow_removed", &x, &len, NULL, 0) < 0)
+               return 0;
+
+       return x > 0 ? 1 : 0;
+}
+
 #endif