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, 29 insertions, 0 deletions

diff --git a/bch_bindgen/src/rs.rs b/bch_bindgen/src/rs.rs
new file mode 100644
index 00000000..24594ae1
--- /dev/null
+++ b/bch_bindgen/src/rs.rs
@@ -0,0 +1,29 @@
+use anyhow::anyhow;
+use crate::bcachefs;
+use crate::bcachefs::*;
+use crate::errcode::bch_errcode;
+
+pub fn read_super_opts(
+    path: &std::path::Path,
+    mut opts: bch_opts,
+) -> anyhow::Result<bch_sb_handle> {
+    use std::os::unix::ffi::OsStrExt;
+    let path = std::ffi::CString::new(path.as_os_str().as_bytes()).unwrap();
+
+    let mut sb = std::mem::MaybeUninit::zeroed();
+
+    let ret =
+        unsafe { crate::bcachefs::bch2_read_super(path.as_ptr(), &mut opts, sb.as_mut_ptr()) };
+
+    if ret != 0 {
+        let err: bch_errcode = unsafe { ::std::mem::transmute(ret) };
+        Err(anyhow!(err))
+    } else {
+        Ok(unsafe { sb.assume_init() })
+    }
+}
+
+pub fn read_super(path: &std::path::Path) -> anyhow::Result<bch_sb_handle> {
+    let opts = bcachefs::bch_opts::default();
+    read_super_opts(path, opts)
+}