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Graphdriver/btrfs: Avoid using single d.Get()

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For btrfs driver, in d.Create(), Get() of parentDir is called but not followed
by Put().

If we apply SElinux mount label, we need to mount btrfs subvolumes in d.Get(),
without a Put() would end up with a later Remove() failure on
"Device resourse is busy".

This calls the subvolume helper function directly in d.Create().

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
This commit is contained in:
Liu Bo 2016-02-04 10:25:24 -08:00
parent 61464701fa
commit b2e27fee53
1 changed files with 5 additions and 1 deletions
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6
daemon/graphdriver/btrfs/btrfs.go
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@ -256,10 +256,14 @@ func (d *Driver) Create(id, parent, mountLabel string) error {
return err
}
} else {
parentDir, err := d.Get(parent, "")
parentDir := d.subvolumesDirID(parent)
st, err := os.Stat(parentDir)
if err != nil {
return err
}
if !st.IsDir() {
return fmt.Errorf("%s: not a direcotory", parentDir)
}
if err := subvolSnapshot(parentDir, subvolumes, id); err != nil {
return err
}