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Symlink Support #5

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Symlink Support #5

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e50c256
add symlink support
ayushr2 Jun 12, 2019
e0917c2
fix comments
ayushr2 Jun 19, 2019
35f4d27
add symlink test
ayushr2 Jun 19, 2019
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13 changes: 13 additions & 0 deletions extent.go
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,19 @@ func (en *ExtentNavigator) Read(offset uint64) (data []byte, err error) {
}
}()

// If the inode is not using extents, its data is stored in inode.i_block.
if !en.inode.Flag(InodeFlagExtents) {
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if en.inode.Size() > uint64(len(en.inode.Data().IBlock)) {
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log.Panicf("Inode size is %v bytes but does not use extents", en.inode.Size())
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}

length := en.inode.Size() - offset
data = make([]byte, length)

copy(data, en.inode.Data().IBlock[offset:en.inode.Size()])
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return
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}

sb := en.inode.BlockGroupDescriptor().Superblock()

blockSize := uint64(sb.BlockSize())
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2 changes: 0 additions & 2 deletions inode.go
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Expand Up @@ -223,8 +223,6 @@ func NewInodeWithReadSeeker(bgd *BlockGroupDescriptor, rs io.ReadSeeker, absolut
if inode.Flag(InodeFlagIndex) == true {
// TODO(dustin): Might be present in large directories. We might need to implement both mechanisms (this and "linear directories").
log.Panicf("hash-tree directories not currently supported")
} else if inode.Flag(InodeFlagExtents) == false {
log.Panicf("only inodes having extent trees are supported")
}

return inode, nil
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