move Rust sources to top level, C sources into c_src

[bcachefs-tools-debian] / c_src / libbcachefs / bkey_buf.h

diff --git a/c_src/libbcachefs/bkey_buf.h b/c_src/libbcachefs/bkey_buf.h
new file mode 100644 (file)
index 0000000..a30c4ae
--- /dev/null
+++ b/c_src/libbcachefs/bkey_buf.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_BKEY_BUF_H
+#define _BCACHEFS_BKEY_BUF_H
+
+#include "bcachefs.h"
+#include "bkey.h"
+
+struct bkey_buf {
+       struct bkey_i   *k;
+       u64             onstack[12];
+};
+
+static inline void bch2_bkey_buf_realloc(struct bkey_buf *s,
+                                        struct bch_fs *c, unsigned u64s)
+{
+       if (s->k == (void *) s->onstack &&
+           u64s > ARRAY_SIZE(s->onstack)) {
+               s->k = mempool_alloc(&c->large_bkey_pool, GFP_NOFS);
+               memcpy(s->k, s->onstack, sizeof(s->onstack));
+       }
+}
+
+static inline void bch2_bkey_buf_reassemble(struct bkey_buf *s,
+                                           struct bch_fs *c,
+                                           struct bkey_s_c k)
+{
+       bch2_bkey_buf_realloc(s, c, k.k->u64s);
+       bkey_reassemble(s->k, k);
+}
+
+static inline void bch2_bkey_buf_copy(struct bkey_buf *s,
+                                     struct bch_fs *c,
+                                     struct bkey_i *src)
+{
+       bch2_bkey_buf_realloc(s, c, src->k.u64s);
+       bkey_copy(s->k, src);
+}
+
+static inline void bch2_bkey_buf_unpack(struct bkey_buf *s,
+                                       struct bch_fs *c,
+                                       struct btree *b,
+                                       struct bkey_packed *src)
+{
+       bch2_bkey_buf_realloc(s, c, BKEY_U64s +
+                             bkeyp_val_u64s(&b->format, src));
+       bch2_bkey_unpack(b, s->k, src);
+}
+
+static inline void bch2_bkey_buf_init(struct bkey_buf *s)
+{
+       s->k = (void *) s->onstack;
+}
+
+static inline void bch2_bkey_buf_exit(struct bkey_buf *s, struct bch_fs *c)
+{
+       if (s->k != (void *) s->onstack)
+               mempool_free(s->k, &c->large_bkey_pool);
+       s->k = NULL;
+}
+
+#endif /* _BCACHEFS_BKEY_BUF_H */