[Libguestfs] [PATCH 0/3] file: Zero for block devices and older file systems

This is the second version to support efficient zero for block devices on older kernels (e.g. RHEL 7.5), and file systems that do not support yet FALLOC_FS_ZERO_RANGE (e.g. NFS 4.2). Changes since v1: - Split to smaller patches - Skip linux only includes on other systems - Skip code using BLKZEROOUT if the macro is not defined - Try BLKZEROOUT only if the offset and count are aligned to device sector size. v1 was here: https://www.redhat.com/archives/libguestfs/2018-July/msg00084.html Nir Soffer (3): file: Avoid unsupported fallocate() calls file: Support zero without ZERO_RANGE file: Zero for block devices on old kernels plugins/file/file.c | 194 +++++++++++++++++++++++++++++++++----------- 1 file changed, 147 insertions(+), 47 deletions(-) -- 2.17.1