forked from RepoMirrors/btrfs
57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
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package btrfs
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import "strings"
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const BTRFS_LABEL_SIZE = 256
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type FeatureFlags uint64
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const (
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FeatureCompatROFreeSpaceTree = FeatureFlags(1 << 0)
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)
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type IncompatFeatures uint64
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func (f IncompatFeatures) String() string {
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var s []string
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for i, name := range incompatFeatureNames {
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if uint64(f)&uint64(i) != 0 {
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s = append(s, name)
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}
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}
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return strings.Join(s, ",")
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}
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var incompatFeatureNames = []string{
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"DefaultSubvol",
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"MixedGroups",
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"CompressLZO",
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"CompressLZOv2",
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"BigMetadata",
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"ExtendedIRef",
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"RAID56",
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"SkinnyMetadata",
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"NoHoles",
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}
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const (
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FeatureIncompatMixedBackRef = IncompatFeatures(1 << 0)
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FeatureIncompatDefaultSubvol = IncompatFeatures(1 << 1)
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FeatureIncompatMixedGroups = IncompatFeatures(1 << 2)
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FeatureIncompatCompressLZO = IncompatFeatures(1 << 3)
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// Some patches floated around with a second compression method
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// lets save that incompat here for when they do get in.
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// Note we don't actually support it, we're just reserving the number.
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FeatureIncompatCompressLZOv2 = IncompatFeatures(1 << 4)
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// Older kernels tried to do bigger metadata blocks, but the
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// code was pretty buggy. Lets not let them try anymore.
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FeatureIncompatBigMetadata = IncompatFeatures(1 << 5)
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FeatureIncompatExtendedIRef = IncompatFeatures(1 << 6)
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FeatureIncompatRAID56 = IncompatFeatures(1 << 7)
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FeatureIncompatSkinnyMetadata = IncompatFeatures(1 << 8)
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FeatureIncompatNoHoles = IncompatFeatures(1 << 9)
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)
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