Re: [PATCH 1/1 version2] Extent overlap bugfix in ext4

[Alex Tomas]

>>>>> Amit K Arora (AKA) writes:

 AKA> @@ -1984,6 +2034,10 @@ int ext4_ext_get_blocks(handle_t *handle
 AKA>            */
 AKA>           if (ee_len > EXT_MAX_LEN)
 AKA>                   goto out2;
 AKA> +
 AKA> +         if (iblock < ee_block && iblock + max_blocks >= ee_block)
 AKA> +                 allocated = ee_block - iblock;
 AKA> +
 AKA>           /* if found extent covers block, simply return it */
 AKA>           if (iblock >= ee_block && iblock < ee_block + ee_len) {
 AKA>                   newblock = iblock - ee_block + ee_start;

I thought existing code already does this:

        /* if found extent covers block, simply return it */
        if (iblock >= ee_block && iblock < ee_block + ee_len) {
                newblock = iblock - ee_block + ee_start;
                /* number of remaining blocks in the extent */
                allocated = ee_len - (iblock - ee_block);


thanks, Alex
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