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, 49 insertions, 0 deletions

diff --git a/c_src/include/linux/posix_acl.h b/c_src/include/linux/posix_acl.h
new file mode 100644
index 00000000..1d21bfee
--- /dev/null
+++ b/c_src/include/linux/posix_acl.h
@@ -0,0 +1,49 @@
+/*
+  File: linux/posix_acl.h
+
+  (C) 2002 Andreas Gruenbacher, <a.gruenbacher@computer.org>
+*/
+
+
+#ifndef __LINUX_POSIX_ACL_H
+#define __LINUX_POSIX_ACL_H
+
+#include <linux/bug.h>
+#include <linux/slab.h>
+#include <linux/rcupdate.h>
+
+#define ACL_UNDEFINED_ID	(-1)
+
+/* a_type field in acl_user_posix_entry_t */
+#define ACL_TYPE_ACCESS		(0x8000)
+#define ACL_TYPE_DEFAULT	(0x4000)
+
+/* e_tag entry in struct posix_acl_entry */
+#define ACL_USER_OBJ		(0x01)
+#define ACL_USER		(0x02)
+#define ACL_GROUP_OBJ		(0x04)
+#define ACL_GROUP		(0x08)
+#define ACL_MASK		(0x10)
+#define ACL_OTHER		(0x20)
+
+/* permissions in the e_perm field */
+#define ACL_READ		(0x04)
+#define ACL_WRITE		(0x02)
+#define ACL_EXECUTE		(0x01)
+
+struct posix_acl_entry {
+	short			e_tag;
+	unsigned short		e_perm;
+	union {
+		uid_t		e_uid;
+		gid_t		e_gid;
+	};
+};
+
+struct posix_acl {
+	struct rcu_head		a_rcu;
+	unsigned int		a_count;
+	struct posix_acl_entry	a_entries[0];
+};
+
+#endif  /* __LINUX_POSIX_ACL_H */