[Libguestfs] [PATCH nbdkit v4 12/15] xz: Disable extents information in this filter.

However we ought to support this in future because xz files contain sparseness information, so add a note. --- filters/xz/xz.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/filters/xz/xz.c b/filters/xz/xz.c index ec41f25..3013538 100644 --- a/filters/xz/xz.c +++ b/filters/xz/xz.c @@ -185,6 +185,16 @@ xz_can_write (struct nbdkit_next_ops *next_ops, void *nxdata, return 0; } +/* Similar to above. However xz files themselves do support + * sparseness so in future we should generate extents information. XXX + */ +static int +xz_can_extents (struct nbdkit_next_ops *next_ops, void *nxdata, + void *handle) +{ + return 0; +} + /* Read data from the file. */ static int xz_pread (struct nbdkit_next_ops *next_ops, void *nxdata, @@ -238,6 +248,7 @@ static struct nbdkit_filter filter = { .prepare = xz_prepare, .get_size = xz_get_size, .can_write = xz_can_write, + .can_extents = xz_can_extents, .pread = xz_pread, }; -- 2.20.1