motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 07:13:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

block: Convert bdrv_co_discard() to byte-based

Browse source 
Another step towards byte-based interfaces everywhere.  Replace
the sector-based bdrv_co_discard() with a new byte-based
bdrv_co_pdiscard(), which silently ignores any unaligned head
or tail.  Driver callbacks will be converted in followup patches.

By calculating the alignment outside of the loop, and clamping
the max discard to an aligned value, we can simplify the actions
done within the loop.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1468624988-423-2-git-send-email-eblake@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Eric Blake 2016-07-15 17:22:50 -06:00 • committed by Stefan Hajnoczi
parent 6bd01f14db
commit 9f1963b3f7
5 changed files with 42 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

3
block/block-backend.c
View file

@ -1113,7 +1113,8 @@ int blk_co_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors)
return ret;
}
return bdrv_co_discard(blk_bs(blk), sector_num, nb_sectors);
return bdrv_co_pdiscard(blk_bs(blk), sector_num << BDRV_SECTOR_BITS,
nb_sectors << BDRV_SECTOR_BITS);
}
int blk_co_flush(BlockBackend *blk)