On Sat 30 Mar 2019 04:07:02 PM CET, Eric Blake wrote: > Disk sizes close to INT64_MAX cause overflow, for some pretty > ridiculous output: > > $ ./nbdkit -U - memory size=$((2**63 - 512)) --run 'qemu-img info $nbd' > image: nbd+unix://?socket=/tmp/nbdkitHSAzNz/socket > file format: raw > virtual size: -8388607T (9223372036854775296 bytes) > disk size: unavailable > > But there's no reason to have two separate implementations of integer > to human-readable abbreviation, where one has overflow and stops at > 'T', while the other avoids overflow and goes all the way to 'E'. With > this patch, the output now claims 8EiB instead of -8388607T, which > really is the correct rounding of largest file size supported by qemu > (we could go 511 bytes larger if we used byte-accurate sizing instead > of rounding up to the next sector boundary, but that wouldn't change > the human-readable result). > > Reported-by: Richard W.M. Jones <rjo...@redhat.com> > Signed-off-by: Eric Blake <ebl...@redhat.com>
Reviewed-by: Alberto Garcia <be...@igalia.com> Berto
