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block: workaround for unaligned byte range in fallocate()
Revert the commit 118f994 'block/io.c: fix for the allocation failure' and use better error handling for file systems that do not support fallocate() for an unaligned byte range. Allow falling back to pwrite in case fallocate() returns EINVAL. Suggested-by: Kevin Wolf <kwolf@redhat.com> Suggested-by: Eric Blake <eblake@redhat.com> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Message-Id: <1566913973-15490-1-git-send-email-andrey.shinkevich@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
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