29 lines
570 B
Go
29 lines
570 B
Go
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package fsutil
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import (
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"os"
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"syscall"
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logging "github.com/ipfs/go-log/v2"
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)
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var log = logging.Logger("fsutil")
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const FallocFlPunchHole = 0x02 // linux/falloc.h
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func Deallocate(file *os.File, offset int64, length int64) error {
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if length == 0 {
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return nil
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}
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err := syscall.Fallocate(int(file.Fd()), FallocFlPunchHole, offset, length)
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if errno, ok := err.(syscall.Errno); ok {
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if errno == syscall.EOPNOTSUPP || errno == syscall.ENOSYS {
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log.Warnf("could not deallocate space, ignoring: %v", errno)
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err = nil // log and ignore
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}
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}
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return err
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}
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