diff options
Diffstat (limited to 'internal/inomap/inomap.go')
| -rw-r--r-- | internal/inomap/inomap.go | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/internal/inomap/inomap.go b/internal/inomap/inomap.go index 1c012d9..b4dbf27 100644 --- a/internal/inomap/inomap.go +++ b/internal/inomap/inomap.go @@ -18,6 +18,7 @@ import ( "log" "math" "sync" + "sync/atomic" "syscall" "github.com/rfjakob/gocryptfs/v2/internal/tlog" @@ -68,19 +69,28 @@ func New(rootDev uint64) *InoMap { var spillWarn sync.Once +// NextSpillIno returns a fresh inode number from the spill pool without adding it to +// spillMap. +// Reverse mode NextSpillIno() for gocryptfs.longname.*.name files where a stable +// mapping is not needed. +func (m *InoMap) NextSpillIno() (out uint64) { + if m.spillNext == math.MaxUint64 { + log.Panicf("spillMap overflow: spillNext = 0x%x", m.spillNext) + } + return atomic.AddUint64(&m.spillNext, 1) - 1 +} + func (m *InoMap) spill(in QIno) (out uint64) { - spillWarn.Do(func() { tlog.Warn.Printf("InoMap: opening spillMap for %v", in) }) + spillWarn.Do(func() { tlog.Warn.Printf("InoMap: opening spillMap for %#v", in) }) out, found := m.spillMap[in] if found { return out } - if m.spillNext == math.MaxUint64 { - log.Panicf("spillMap overflow: spillNext = 0x%x", m.spillNext) - } - out = m.spillNext - m.spillNext++ + + out = m.NextSpillIno() m.spillMap[in] = out + return out } |