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bcachefs: fix simulateously upgrading & downgrading

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commit e7999235e6 upstream.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kent Overstreet 2024-01-05 19:04:42 -05:00 committed by Sasha Levin
parent a7414b3d3c
commit 0b7d401d0b
1 changed files with 12 additions and 3 deletions
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15
fs/bcachefs/super-io.c
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@ -1085,13 +1085,22 @@ bool bch2_check_version_downgrade(struct bch_fs *c)
/*
* Downgrade, if superblock is at a higher version than currently
* supported:
*
* c->sb will be checked before we write the superblock, so update it as
* well:
*/
if (BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb) > bcachefs_metadata_version_current)
if (BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb) > bcachefs_metadata_version_current) {
SET_BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb, bcachefs_metadata_version_current);
if (c->sb.version > bcachefs_metadata_version_current)
c->sb.version_upgrade_complete = bcachefs_metadata_version_current;
}
if (c->sb.version > bcachefs_metadata_version_current) {
c->disk_sb.sb->version = cpu_to_le16(bcachefs_metadata_version_current);
if (c->sb.version_min > bcachefs_metadata_version_current)
c->sb.version = bcachefs_metadata_version_current;
}
if (c->sb.version_min > bcachefs_metadata_version_current) {
c->disk_sb.sb->version_min = cpu_to_le16(bcachefs_metadata_version_current);
c->sb.version_min = bcachefs_metadata_version_current;
}
c->disk_sb.sb->compat[0] &= cpu_to_le64((1ULL << BCH_COMPAT_NR) - 1);
return ret;
}