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-rw-r--r--fs/bcachefs/sb-members_format.h110
1 files changed, 110 insertions, 0 deletions
diff --git a/fs/bcachefs/sb-members_format.h b/fs/bcachefs/sb-members_format.h
new file mode 100644
index 0000000000..e2630548c0
--- /dev/null
+++ b/fs/bcachefs/sb-members_format.h
@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_SB_MEMBERS_FORMAT_H
+#define _BCACHEFS_SB_MEMBERS_FORMAT_H
+
+/*
+ * We refer to members with bitmasks in various places - but we need to get rid
+ * of this limit:
+ */
+#define BCH_SB_MEMBERS_MAX 64
+
+#define BCH_MIN_NR_NBUCKETS (1 << 6)
+
+#define BCH_IOPS_MEASUREMENTS() \
+ x(seqread, 0) \
+ x(seqwrite, 1) \
+ x(randread, 2) \
+ x(randwrite, 3)
+
+enum bch_iops_measurement {
+#define x(t, n) BCH_IOPS_##t = n,
+ BCH_IOPS_MEASUREMENTS()
+#undef x
+ BCH_IOPS_NR
+};
+
+#define BCH_MEMBER_ERROR_TYPES() \
+ x(read, 0) \
+ x(write, 1) \
+ x(checksum, 2)
+
+enum bch_member_error_type {
+#define x(t, n) BCH_MEMBER_ERROR_##t = n,
+ BCH_MEMBER_ERROR_TYPES()
+#undef x
+ BCH_MEMBER_ERROR_NR
+};
+
+struct bch_member {
+ __uuid_t uuid;
+ __le64 nbuckets; /* device size */
+ __le16 first_bucket; /* index of first bucket used */
+ __le16 bucket_size; /* sectors */
+ __u8 btree_bitmap_shift;
+ __u8 pad[3];
+ __le64 last_mount; /* time_t */
+
+ __le64 flags;
+ __le32 iops[4];
+ __le64 errors[BCH_MEMBER_ERROR_NR];
+ __le64 errors_at_reset[BCH_MEMBER_ERROR_NR];
+ __le64 errors_reset_time;
+ __le64 seq;
+ __le64 btree_allocated_bitmap;
+ /*
+ * On recovery from a clean shutdown we don't normally read the journal,
+ * but we still want to resume writing from where we left off so we
+ * don't overwrite more than is necessary, for list journal debugging:
+ */
+ __le32 last_journal_bucket;
+ __le32 last_journal_bucket_offset;
+};
+
+/*
+ * This limit comes from the bucket_gens array - it's a single allocation, and
+ * kernel allocation are limited to INT_MAX
+ */
+#define BCH_MEMBER_NBUCKETS_MAX (INT_MAX - 64)
+
+#define BCH_MEMBER_V1_BYTES 56
+
+LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags, 0, 4)
+/* 4-14 unused, was TIER, HAS_(META)DATA, REPLACEMENT */
+LE64_BITMASK(BCH_MEMBER_DISCARD, struct bch_member, flags, 14, 15)
+LE64_BITMASK(BCH_MEMBER_DATA_ALLOWED, struct bch_member, flags, 15, 20)
+LE64_BITMASK(BCH_MEMBER_GROUP, struct bch_member, flags, 20, 28)
+LE64_BITMASK(BCH_MEMBER_DURABILITY, struct bch_member, flags, 28, 30)
+LE64_BITMASK(BCH_MEMBER_FREESPACE_INITIALIZED,
+ struct bch_member, flags, 30, 31)
+
+#if 0
+LE64_BITMASK(BCH_MEMBER_NR_READ_ERRORS, struct bch_member, flags[1], 0, 20);
+LE64_BITMASK(BCH_MEMBER_NR_WRITE_ERRORS,struct bch_member, flags[1], 20, 40);
+#endif
+
+#define BCH_MEMBER_STATES() \
+ x(rw, 0) \
+ x(ro, 1) \
+ x(failed, 2) \
+ x(spare, 3)
+
+enum bch_member_state {
+#define x(t, n) BCH_MEMBER_STATE_##t = n,
+ BCH_MEMBER_STATES()
+#undef x
+ BCH_MEMBER_STATE_NR
+};
+
+struct bch_sb_field_members_v1 {
+ struct bch_sb_field field;
+ struct bch_member _members[]; //Members are now variable size
+};
+
+struct bch_sb_field_members_v2 {
+ struct bch_sb_field field;
+ __le16 member_bytes; //size of single member entry
+ u8 pad[6];
+ struct bch_member _members[];
+};
+
+#endif /* _BCACHEFS_SB_MEMBERS_FORMAT_H */