bcachefs: Split out alloc_background.c

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 116 insertions, 0 deletions

diff --git a/fs/bcachefs/alloc_foreground.h b/fs/bcachefs/alloc_foreground.h
new file mode 100644
index 000000000000..1c738e4ba6c9
--- /dev/null
+++ b/fs/bcachefs/alloc_foreground.h
@@ -0,0 +1,116 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_ALLOC_FOREGROUND_H
+#define _BCACHEFS_ALLOC_FOREGROUND_H
+
+#include "bcachefs.h"
+#include "alloc_types.h"
+
+struct bkey;
+struct bch_dev;
+struct bch_fs;
+struct bch_devs_List;
+
+struct dev_alloc_list {
+	unsigned	nr;
+	u8		devs[BCH_SB_MEMBERS_MAX];
+};
+
+struct dev_alloc_list bch2_wp_alloc_list(struct bch_fs *,
+					 struct write_point *,
+					 struct bch_devs_mask *);
+void bch2_wp_rescale(struct bch_fs *, struct bch_dev *,
+		     struct write_point *);
+
+long bch2_bucket_alloc_new_fs(struct bch_dev *);
+
+int bch2_bucket_alloc(struct bch_fs *, struct bch_dev *, enum alloc_reserve, bool,
+		      struct closure *);
+
+#define __writepoint_for_each_ptr(_wp, _ob, _i, _start)			\
+	for ((_i) = (_start);						\
+	     (_i) < (_wp)->nr_ptrs && ((_ob) = (_wp)->ptrs[_i], true);	\
+	     (_i)++)
+
+#define writepoint_for_each_ptr_all(_wp, _ob, _i)			\
+	__writepoint_for_each_ptr(_wp, _ob, _i, 0)
+
+#define writepoint_for_each_ptr(_wp, _ob, _i)				\
+	__writepoint_for_each_ptr(_wp, _ob, _i, wp->first_ptr)
+
+void __bch2_open_bucket_put(struct bch_fs *, struct open_bucket *);
+
+static inline void bch2_open_bucket_put(struct bch_fs *c, struct open_bucket *ob)
+{
+	if (atomic_dec_and_test(&ob->pin))
+		__bch2_open_bucket_put(c, ob);
+}
+
+static inline void bch2_open_bucket_put_refs(struct bch_fs *c, u8 *nr, u8 *refs)
+{
+	unsigned i;
+
+	for (i = 0; i < *nr; i++)
+		bch2_open_bucket_put(c, c->open_buckets + refs[i]);
+
+	*nr = 0;
+}
+
+static inline void bch2_open_bucket_get(struct bch_fs *c,
+					struct write_point *wp,
+					u8 *nr, u8 *refs)
+{
+	struct open_bucket *ob;
+	unsigned i;
+
+	writepoint_for_each_ptr(wp, ob, i) {
+		atomic_inc(&ob->pin);
+		refs[(*nr)++] = ob - c->open_buckets;
+	}
+}
+
+struct write_point *bch2_alloc_sectors_start(struct bch_fs *,
+					     unsigned,
+					     struct write_point_specifier,
+					     struct bch_devs_list *,
+					     unsigned, unsigned,
+					     enum alloc_reserve,
+					     unsigned,
+					     struct closure *);
+
+void bch2_alloc_sectors_append_ptrs(struct bch_fs *, struct write_point *,
+				    struct bkey_i_extent *, unsigned);
+void bch2_alloc_sectors_done(struct bch_fs *, struct write_point *);
+
+void bch2_writepoint_stop(struct bch_fs *, struct bch_dev *,
+			  struct write_point *);
+
+void bch2_writepoint_drop_ptrs(struct bch_fs *, struct write_point *,
+			       u16, bool);
+
+static inline struct hlist_head *writepoint_hash(struct bch_fs *c,
+						 unsigned long write_point)
+{
+	unsigned hash =
+		hash_long(write_point, ilog2(ARRAY_SIZE(c->write_points_hash)));
+
+	return &c->write_points_hash[hash];
+}
+
+static inline struct write_point_specifier writepoint_hashed(unsigned long v)
+{
+	return (struct write_point_specifier) { .v = v | 1 };
+}
+
+static inline struct write_point_specifier writepoint_ptr(struct write_point *wp)
+{
+	return (struct write_point_specifier) { .v = (unsigned long) wp };
+}
+
+static inline void writepoint_init(struct write_point *wp,
+				   enum bch_data_type type)
+{
+	mutex_init(&wp->lock);
+	wp->type = type;
+}
+
+#endif /* _BCACHEFS_ALLOC_FOREGROUND_H */