Update bcachefs sources to 481b5f343248 bcachefs: Better error messages for missing...

[bcachefs-tools-debian] / libbcachefs / alloc_background_format.h

diff --git a/libbcachefs/alloc_background_format.h b/libbcachefs/alloc_background_format.h
new file mode 100644 (file)
index 0000000..b4ec20b
--- /dev/null
+++ b/libbcachefs/alloc_background_format.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_ALLOC_BACKGROUND_FORMAT_H
+#define _BCACHEFS_ALLOC_BACKGROUND_FORMAT_H
+
+struct bch_alloc {
+       struct bch_val          v;
+       __u8                    fields;
+       __u8                    gen;
+       __u8                    data[];
+} __packed __aligned(8);
+
+#define BCH_ALLOC_FIELDS_V1()                  \
+       x(read_time,            16)             \
+       x(write_time,           16)             \
+       x(data_type,            8)              \
+       x(dirty_sectors,        16)             \
+       x(cached_sectors,       16)             \
+       x(oldest_gen,           8)              \
+       x(stripe,               32)             \
+       x(stripe_redundancy,    8)
+
+enum {
+#define x(name, _bits) BCH_ALLOC_FIELD_V1_##name,
+       BCH_ALLOC_FIELDS_V1()
+#undef x
+};
+
+struct bch_alloc_v2 {
+       struct bch_val          v;
+       __u8                    nr_fields;
+       __u8                    gen;
+       __u8                    oldest_gen;
+       __u8                    data_type;
+       __u8                    data[];
+} __packed __aligned(8);
+
+#define BCH_ALLOC_FIELDS_V2()                  \
+       x(read_time,            64)             \
+       x(write_time,           64)             \
+       x(dirty_sectors,        32)             \
+       x(cached_sectors,       32)             \
+       x(stripe,               32)             \
+       x(stripe_redundancy,    8)
+
+struct bch_alloc_v3 {
+       struct bch_val          v;
+       __le64                  journal_seq;
+       __le32                  flags;
+       __u8                    nr_fields;
+       __u8                    gen;
+       __u8                    oldest_gen;
+       __u8                    data_type;
+       __u8                    data[];
+} __packed __aligned(8);
+
+LE32_BITMASK(BCH_ALLOC_V3_NEED_DISCARD,struct bch_alloc_v3, flags,  0,  1)
+LE32_BITMASK(BCH_ALLOC_V3_NEED_INC_GEN,struct bch_alloc_v3, flags,  1,  2)
+
+struct bch_alloc_v4 {
+       struct bch_val          v;
+       __u64                   journal_seq;
+       __u32                   flags;
+       __u8                    gen;
+       __u8                    oldest_gen;
+       __u8                    data_type;
+       __u8                    stripe_redundancy;
+       __u32                   dirty_sectors;
+       __u32                   cached_sectors;
+       __u64                   io_time[2];
+       __u32                   stripe;
+       __u32                   nr_external_backpointers;
+       __u64                   fragmentation_lru;
+} __packed __aligned(8);
+
+#define BCH_ALLOC_V4_U64s_V0   6
+#define BCH_ALLOC_V4_U64s      (sizeof(struct bch_alloc_v4) / sizeof(__u64))
+
+BITMASK(BCH_ALLOC_V4_NEED_DISCARD,     struct bch_alloc_v4, flags,  0,  1)
+BITMASK(BCH_ALLOC_V4_NEED_INC_GEN,     struct bch_alloc_v4, flags,  1,  2)
+BITMASK(BCH_ALLOC_V4_BACKPOINTERS_START,struct bch_alloc_v4, flags,  2,  8)
+BITMASK(BCH_ALLOC_V4_NR_BACKPOINTERS,  struct bch_alloc_v4, flags,  8,  14)
+
+#define KEY_TYPE_BUCKET_GENS_BITS      8
+#define KEY_TYPE_BUCKET_GENS_NR                (1U << KEY_TYPE_BUCKET_GENS_BITS)
+#define KEY_TYPE_BUCKET_GENS_MASK      (KEY_TYPE_BUCKET_GENS_NR - 1)
+
+struct bch_bucket_gens {
+       struct bch_val          v;
+       u8                      gens[KEY_TYPE_BUCKET_GENS_NR];
+} __packed __aligned(8);
+
+#endif /* _BCACHEFS_ALLOC_BACKGROUND_FORMAT_H */