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38 lines
860 B
Go
38 lines
860 B
Go
package zfs
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import (
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"fmt"
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"strings"
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"syscall"
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log "github.com/Sirupsen/logrus"
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"github.com/docker/docker/daemon/graphdriver"
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)
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func checkRootdirFs(rootdir string) error {
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var buf syscall.Statfs_t
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if err := syscall.Statfs(rootdir, &buf); err != nil {
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return fmt.Errorf("Failed to access '%s': %s", rootdir, err)
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}
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// on FreeBSD buf.Fstypename contains ['z', 'f', 's', 0 ... ]
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if (buf.Fstypename[0] != 122) || (buf.Fstypename[1] != 102) || (buf.Fstypename[2] != 115) || (buf.Fstypename[3] != 0) {
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log.Debugf("[zfs] no zfs dataset found for rootdir '%s'", rootdir)
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return graphdriver.ErrPrerequisites
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}
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return nil
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}
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func getMountpoint(id string) string {
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maxlen := 12
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// we need to preserve filesystem suffix
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suffix := strings.SplitN(id, "-", 2)
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if len(suffix) > 1 {
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return id[:maxlen] + "-" + suffix[1]
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}
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return id[:maxlen]
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}
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