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qemu-img: Saner printing of large file sizes

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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).

Quite a few iotests need updates to expected output to match.

Reported-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Tested-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Eric Blake 2019-04-17 12:11:01 -05:00 • committed by Kevin Wolf
parent 754da86714
commit de38b5005e
29 changed files with 123 additions and 150 deletions
Download patch file Download diff file Expand all files Collapse all files

22
tests/qemu-iotests/237.out
View file

@ -14,7 +14,7 @@
image: TEST_IMG
file format: IMGFMT
virtual size: 5.0G (5368709120 bytes)
virtual size: 5 GiB (5368709120 bytes)
cluster_size: 65536
Format specific information:
cid: XXXXXXXXXX
@ -41,7 +41,7 @@ Format specific information:
image: TEST_IMG
file format: IMGFMT
virtual size: 64M (67108864 bytes)
virtual size: 64 MiB (67108864 bytes)
cluster_size: 65536
Format specific information:
cid: XXXXXXXXXX
@ -68,7 +68,7 @@ Format specific information:
image: TEST_IMG
file format: IMGFMT
virtual size: 32M (33554432 bytes)
virtual size: 32 MiB (33554432 bytes)
cluster_size: 65536
Format specific information:
cid: XXXXXXXXXX
@ -169,7 +169,7 @@ Job failed: List of extents contains unused extents
image: TEST_IMG
file format: IMGFMT
virtual size: 512 (512 bytes)
virtual size: 512 B (512 bytes)
Format specific information:
cid: XXXXXXXXXX
parent cid: XXXXXXXXXX
@ -189,7 +189,7 @@ Format specific information:
image: TEST_IMG
file format: IMGFMT
virtual size: 512 (512 bytes)
virtual size: 512 B (512 bytes)
cluster_size: 65536
Format specific information:
cid: XXXXXXXXXX
@ -211,7 +211,7 @@ Format specific information:
image: TEST_IMG
file format: IMGFMT
virtual size: 1.0G (1073741824 bytes)
virtual size: 1 GiB (1073741824 bytes)
Format specific information:
cid: XXXXXXXXXX
parent cid: XXXXXXXXXX
@ -231,7 +231,7 @@ Format specific information:
image: TEST_IMG
file format: IMGFMT
virtual size: 1.0G (1073741824 bytes)
virtual size: 1 GiB (1073741824 bytes)
cluster_size: 65536
Format specific information:
cid: XXXXXXXXXX
@ -253,7 +253,7 @@ Format specific information:
image: TEST_IMG
file format: IMGFMT
virtual size: 2.0G (2147483648 bytes)
virtual size: 2 GiB (2147483648 bytes)
Format specific information:
cid: XXXXXXXXXX
parent cid: XXXXXXXXXX
@ -273,7 +273,7 @@ Format specific information:
image: TEST_IMG
file format: IMGFMT
virtual size: 2.0G (2147483648 bytes)
virtual size: 2 GiB (2147483648 bytes)
cluster_size: 65536
Format specific information:
cid: XXXXXXXXXX
@ -295,7 +295,7 @@ Format specific information:
image: TEST_IMG
file format: IMGFMT
virtual size: 5.0G (5368709120 bytes)
virtual size: 5 GiB (5368709120 bytes)
Format specific information:
cid: XXXXXXXXXX
parent cid: XXXXXXXXXX
@ -323,7 +323,7 @@ Format specific information:
image: TEST_IMG
file format: IMGFMT
virtual size: 5.0G (5368709120 bytes)
virtual size: 5 GiB (5368709120 bytes)
cluster_size: 65536
Format specific information:
cid: XXXXXXXXXX