summaryrefslogtreecommitdiffstats
path: root/fs/bcachefs/bkey_buf.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/bcachefs/bkey_buf.h')
-rw-r--r--fs/bcachefs/bkey_buf.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/fs/bcachefs/bkey_buf.h b/fs/bcachefs/bkey_buf.h
new file mode 100644
index 0000000000..a30c4ae8eb
--- /dev/null
+++ b/fs/bcachefs/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 */