mirrors/qemu
0
0
Fork 0
mirror of https://github.com/qemu/qemu.git synced 2024-11-30 15:23:34 +08:00
Code Issues Packages Projects Releases Wiki Activity

vpc: Don't round up already aligned BAT sizes

Browse Source 
As reported on Launchpad, Azure apparently doesn't accept images for
upload that are not both aligned to 1 MB blocks and have a BAT size that
matches the image size exactly.

As far as I can tell, there is no real reason why we create a BAT that
is one entry longer than necessary for aligned image sizes, so change
that.

(Even though the condition is only mentioned as "should" in the spec and
previous products accepted larger BATs - but we'll try to maintain
compatibility with as many of Microsoft's ever-changing interpretations
of the VHD spec as possible.)

Fixes: https://bugs.launchpad.net/bugs/1870098
Reported-by: Tobias Witek
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200402093603.2369-1-kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 3f6de653b9)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Kevin Wolf 2020-04-02 11:36:03 +02:00 committed by Michael Roth
parent 9c2e242077
commit ecdb0d5651
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/vpc.c
View File

@ -835,7 +835,7 @@ static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf,
/* Write the footer (twice: at the beginning and at the end) */
block_size = 0x200000;
num_bat_entries = (total_sectors + block_size / 512) / (block_size / 512);
num_bat_entries = DIV_ROUND_UP(total_sectors, block_size / 512);
ret = blk_pwrite(blk, offset, buf, HEADER_SIZE, 0);
if (ret < 0) {