1 files changed, 81 insertions, 0 deletions
diff --git a/src/pmdk/src/libpmem/pmem_posix.c b/src/pmdk/src/libpmem/pmem_posix.c
new file mode 100644
index 000000000..d295b13c7
--- /dev/null
+++ b/src/pmdk/src/libpmem/pmem_posix.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/* Copyright 2014-2019, Intel Corporation */
+
+/*
+ * pmem_posix.c -- pmem utilities with Posix implementation
+ */
+
+#include <stddef.h>
+#include <sys/mman.h>
+
+#include "pmem.h"
+#include "out.h"
+#include "mmap.h"
+
+/*
+ * is_pmem_detect -- implement pmem_is_pmem()
+ *
+ * This function returns true only if the entire range can be confirmed
+ * as being direct access persistent memory.  Finding any part of the
+ * range is not direct access, or failing to look up the information
+ * because it is unmapped or because any sort of error happens, just
+ * results in returning false.
+ */
+int
+is_pmem_detect(const void *addr, size_t len)
+{
+	LOG(3, "addr %p len %zu", addr, len);
+
+	if (len == 0)
+		return 0;
+
+	int retval = util_range_is_pmem(addr, len);
+
+	LOG(4, "returning %d", retval);
+	return retval;
+}
+
+/*
+ * pmem_map_register -- memory map file and register mapping
+ */
+void *
+pmem_map_register(int fd, size_t len, const char *path, int is_dev_dax)
+{
+	LOG(3, "fd %d len %zu path %s id_dev_dax %d",
+			fd, len, path, is_dev_dax);
+
+	void *addr;
+	int map_sync;
+	addr = util_map(fd, 0, len, MAP_SHARED, 0, 0, &map_sync);
+	if (!addr)
+		return NULL;
+
+	enum pmem_map_type type = MAX_PMEM_TYPE;
+	if (is_dev_dax)
+		type = PMEM_DEV_DAX;
+	else if (map_sync)
+		type = PMEM_MAP_SYNC;
+
+	if (type != MAX_PMEM_TYPE) {
+		if (util_range_register(addr, len, path, type)) {
+			LOG(1, "can't track mapped region");
+			goto err_unmap;
+		}
+	}
+
+	return addr;
+err_unmap:
+	util_unmap(addr, len);
+	return NULL;
+}
+
+/*
+ * pmem_os_init -- os-dependent part of pmem initialization
+ */
+void
+pmem_os_init(is_pmem_func *func)
+{
+	LOG(3, NULL);
+
+	*func = is_pmem_detect;
+}