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13 July 2024, 08:20:57 UTC
Revision de01dfadf25bf83cfe3d85c163005c4320532658 authored by NeilBrown on 06 February 2009, 07:02:46 UTC, committed by NeilBrown on 06 February 2009, 07:02:46 UTC 
md: Ensure an md array never has too many devices.
 
Each different metadata format supported by md supports a
different maximum number of devices.
We really should be enforcing this maximum in the kernel, but
we aren't quite doing that properly.

We currently only enforce it at the 'hot_add' point, which is an
older interface which is not used by current userspace.

We need to also enforce it at 'add_new_disk' time for active arrays
and at 'do_md_run' time when starting a new array.

So move the test from 'hot_add' into 'bind_rdev_to_array' which is
called from both 'hot_add' and 'add_new_disk, and add a new
test in 'analyse_sbs' which is called from 'do_md_run'.

This bug (or missing feature) has been around "forever" and so
the patch is suitable for any -stable that is currently maintained.

Cc: stable@kernel.org

Signed-off-by: NeilBrown <neilb@suse.de>
1 parent 852c8bf
History
Tip revision: de01dfadf25bf83cfe3d85c163005c4320532658 authored by NeilBrown on 06 February 2009, 07:02:46 UTC
md: Ensure an md array never has too many devices.
Tip revision: de01dfa
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