Re: [PATCH 1/9] extents for ext4

From: Mingming Cao
Date: Thu Aug 10 2006 - 12:44:18 EST

Andrew Morton wrote:

On Wed, 09 Aug 2006 18:20:26 -0700
Mingming Cao <cmm@xxxxxxxxxx> 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)


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