frostfs-node/pkg/local_object_storage/metabase/mode.go

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package meta
import (
"fmt"
"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode"
)
// SetMode sets the metabase mode of operation.
// If the mode assumes no operation metabase, the database is closed.
func (db *DB) SetMode(m mode.Mode) error {
db.modeMtx.Lock()
defer db.modeMtx.Unlock()
if db.mode == m {
return nil
}
if !db.mode.NoMetabase() {
if err := db.Close(); err != nil {
return fmt.Errorf("can't set metabase mode (old=%s, new=%s): %w", db.mode, m, err)
}
}
var err error
switch m {
case mode.Degraded:
db.boltDB = nil
case mode.ReadOnly:
err = db.Open(true)
case mode.ReadWrite:
err = db.Open(false)
}
if err == nil && !m.NoMetabase() && !m.ReadOnly() {
err = db.Init()
}
if err != nil {
return fmt.Errorf("can't set metabase mode (old=%s, new=%s): %w", db.mode, m, err)
}
db.mode = m
return nil
}