From: "Wu, Hao A" <hao.a.wu@intel.com>
To: "Gao, Zhichao" <zhichao.gao@intel.com>,
"devel@edk2.groups.io" <devel@edk2.groups.io>
Cc: "Wang, Jian J" <jian.j.wang@intel.com>,
"Ni, Ray" <ray.ni@intel.com>, "Gary Lin" <glin@suse.com>,
Andrew Fish <afish@apple.com>
Subject: Re: [PATCH V2 3/3] MdeModulePkg/PartitionDxe: Fix the incorrect LBA size in child hander
Date: Wed, 12 Aug 2020 06:35:26 +0000 [thread overview]
Message-ID: <DM6PR11MB3673145A788AC175BF64B426CA420@DM6PR11MB3673.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20200812012124.18220-4-zhichao.gao@intel.com>
> -----Original Message-----
> From: Gao, Zhichao <zhichao.gao@intel.com>
> Sent: Wednesday, August 12, 2020 9:21 AM
> To: devel@edk2.groups.io
> Cc: Wang, Jian J <jian.j.wang@intel.com>; Wu, Hao A
> <hao.a.wu@intel.com>; Ni, Ray <ray.ni@intel.com>; Gary Lin
> <glin@suse.com>; Andrew Fish <afish@apple.com>
> Subject: [PATCH V2 3/3] MdeModulePkg/PartitionDxe: Fix the incorrect LBA
> size in child hander
>
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2843
>
> PartitionInstallChildHandle's parameters Start and End is counted by the
> BlockSize, but in the implementation it uses the parent device's BlockSize to
> calculate the new Start, End and LastBlock.
> It would cause the driver report incorrect block scope and the file system
> would fail to be found with right block scope.
> So correct it to the right value.
>
> Cc: Jian J Wang <jian.j.wang@intel.com>
> Cc: Hao A Wu <hao.a.wu@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Gary Lin <glin@suse.com>
> Cc: Andrew Fish <afish@apple.com>
> Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
> Reviewed-by: Ray Ni <ray.ni@intel.com>
> ---
> MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c | 12 +++---------
> 1 file changed, 3 insertions(+), 9 deletions(-)
>
> diff --git a/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
> b/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
> index 473e091320..f10ce7c65b 100644
> --- a/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
> +++ b/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
> @@ -1149,8 +1149,8 @@ PartitionInstallChildHandle (
>
> Private->Signature = PARTITION_PRIVATE_DATA_SIGNATURE;
>
> - Private->Start = MultU64x32 (Start, ParentBlockIo->Media-
> >BlockSize);
> - Private->End = MultU64x32 (End + 1, ParentBlockIo->Media-
> >BlockSize);
> + Private->Start = MultU64x32 (Start, BlockSize);
> + Private->End = MultU64x32 (End + 1, BlockSize);
For function PartitionInstallChildHandle(), the input parameters 'Start' and
'End' (which denote the block index) should be of unit indicated by the input
parameter 'BlockSize'.
I checked all the callers of PartitionInstallChildHandle(), it looks to me that
GPT, MBR and UDF follow the above rule. While I am not able to get a straight-
forward match for the El Torito case. It seems fine with me, but I am not sure.
Anyway, if the CDROM content can be properly identified then I think the change
will be good.
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Best Regards,
Hao Wu
>
> Private->BlockSize = BlockSize;
> Private->ParentBlockIo = ParentBlockIo;
> @@ -1187,13 +1187,7 @@ PartitionInstallChildHandle (
>
> Private->Media.IoAlign = 0;
> Private->Media.LogicalPartition = TRUE;
> - Private->Media.LastBlock = DivU64x32 (
> - MultU64x32 (
> - End - Start + 1,
> - ParentBlockIo->Media->BlockSize
> - ),
> - BlockSize
> - ) - 1;
> + Private->Media.LastBlock = End - Start;
>
> Private->Media.BlockSize = (UINT32) BlockSize;
>
> --
> 2.21.0.windows.1
next prev parent reply other threads:[~2020-08-12 6:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-12 1:21 [PATCH V2 0/3] MdeModulePkg/PartitionDxe: Make the parition driver match the spec Gao, Zhichao
2020-08-12 1:21 ` [PATCH V2 1/3] MdeModulePkg/PartitionDxe: Put the UDF check ahead of MBR Gao, Zhichao
2020-08-12 5:22 ` [edk2-devel] " Ni, Ray
2020-08-12 6:37 ` Wu, Hao A
2020-08-12 1:21 ` [PATCH V2 2/3] MdeModulePkg/PartitionDxe: Revert changes for the special MBR Gao, Zhichao
2020-08-12 5:23 ` [edk2-devel] " Ni, Ray
2020-08-12 6:38 ` Wu, Hao A
2020-08-12 6:38 ` Wu, Hao A
2020-08-12 1:21 ` [PATCH V2 3/3] MdeModulePkg/PartitionDxe: Fix the incorrect LBA size in child hander Gao, Zhichao
2020-08-12 6:35 ` Wu, Hao A [this message]
2020-08-13 1:38 ` Gao, Zhichao
2020-08-12 6:26 ` [PATCH V2 0/3] MdeModulePkg/PartitionDxe: Make the parition driver match the spec Gary Lin
2020-08-12 11:04 ` [edk2-devel] " Laszlo Ersek
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