bcachefs: BCH_SB_VERSION_UPGRADE_COMPLETE()
Version upgrades are not atomic operations: when we do a version upgrade
we need to update the superblock before we start using new features, and
then when the upgrade completes we need to update the superblock again.
This adds a new superblock field so we can detect and handle incomplete
version upgrades.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
diff --git a/fs/bcachefs/bcachefs.h b/fs/bcachefs/bcachefs.h
index a8488d4..d7f030a 100644
--- a/fs/bcachefs/bcachefs.h
+++ b/fs/bcachefs/bcachefs.h
@@ -712,6 +712,7 @@ struct bch_fs {
u16 version;
u16 version_min;
+ u16 version_upgrade_complete;
u8 nr_devices;
u8 clean;
@@ -1134,6 +1135,12 @@ static inline bool bch2_dev_exists2(const struct bch_fs *c, unsigned dev)
return dev < c->sb.nr_devices && c->devs[dev];
}
+static inline bool bch2_version_upgrading_to(const struct bch_fs *c, unsigned new_version)
+{
+ return c->sb.version_upgrade_complete < new_version &&
+ c->sb.version >= new_version;
+}
+
#define BKEY_PADDED_ONSTACK(key, pad) \
struct { struct bkey_i key; __u64 key ## _pad[pad]; }
