Messages in this thread | | | Date | Thu, 20 Mar 2003 16:02:06 -0800 | From | "H. Peter Anvin" <> | Subject | Re: Larger dev_t and major/minor split |
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Joel Becker wrote: > On Thu, Mar 20, 2003 at 03:06:31PM -0800, H. Peter Anvin wrote: > >>Last I checked, all traditional (inode-based) Unix filesystems, >>including ext2/3 used block pointers for dev_t. There are plenty of >>block pointers; 60 bytes worth. > > They do indeed. But ext2/3 touches that block pointer with > cpu_to_le32() and friends. It needs fixing at best, and compatability > work for already existing partitions. >
A few options:
a) Use an inode flag indicating a large dev_t. This is probably the best option.
b) Use a sentinel value, e.g. 0xffffffff, to indicate that the major and minor are in block pointers 1 and 2.
-hpa
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