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rbd: add doc comment to Discard function 

Signed-off-by: John Mulligan <jmulligan@redhat.com>
This commit is contained in:
John Mulligan 2020-02-25 14:40:08 -05:00 committed by John Mulligan
parent d71fb3b2ea
commit 223f1e01d7
1 changed files with 6 additions and 1 deletions
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5
rbd/rbd.go
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@ -800,6 +800,11 @@ func (image *Image) Seek(offset int64, whence int) (int64, error) {
return image.offset, nil
}
// Discard the supplied range from the image. The supplied range will be read
// as zeros once Discard returns. The discarded range will no longer take up
// space.
//
// Implements:
// int rbd_discard(rbd_image_t image, uint64_t ofs, uint64_t len);
func (image *Image) Discard(ofs uint64, length uint64) (int, error) {
if err := image.validate(imageIsOpen); err != nil {