move Rust sources to top level, C sources into c_src

This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:

$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command

instead of "./bcachefs command".

Building and installing is still:

$ make && make install

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 20 insertions, 0 deletions

diff --git a/c_src/include/linux/string_helpers.h b/c_src/include/linux/string_helpers.h
new file mode 100644
index 00000000..af587706
--- /dev/null
+++ b/c_src/include/linux/string_helpers.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_STRING_HELPERS_H_
+#define _LINUX_STRING_HELPERS_H_
+
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/types.h>
+
+
+/* Descriptions of the types of units to
+ * print in */
+enum string_size_units {
+	STRING_UNITS_10,	/* use powers of 10^3 (standard SI) */
+	STRING_UNITS_2,		/* use binary powers of 2^10 */
+};
+
+int string_get_size(u64 size, u64 blk_size, enum string_size_units units,
+		    char *buf, int len);
+
+#endif