Re: [PATCH 1/9] extents for ext4

[Mingming Cao <cmm@us.ibm.com>]

Andrew Morton wrote:

> On Wed, 09 Aug 2006 18:20:26 -0700
> Mingming Cao <cmm@us.ibm.com> wrote:
> 
> 
>>Add extent map support to ext4. Patch from Alex Tomas.
>>
>>On disk extents format:
>>/*
>>  * this is extent on-disk structure
>>  * it's used at the bottom of the tree
>>  */
>>struct ext3_extent {
>>        __le32  ee_block;       /* first logical block extent covers */
>>        __le16  ee_len;         /* number of blocks covered by extent */
>>        __le16  ee_start_hi;    /* high 16 bits of physical block */
>>        __le32  ee_start;       /* low 32 bigs of physical block */
>>};
>>
> 
> 
>>From a quick scan:
> 

> - There are several places which appear to be putting block numbers into
>   an `int'.
> 

This is fixed in [PATCH 4/9] 48bit support in extents, where we 
converted those "int" type block numbers to ext4_fsblk_t (which is 
typedefined as sector_t to support 48bit)

Thanks,
Mingming