tree c84f916df71293e0e15643a8a07d9508d1404395
parent 773f7834425e83144c95fbbc553ced3c2b74b828
author NeilBrown <neilb@cse.unsw.edu.au> 1126308233 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1126309152 -0700

[PATCH] md: limit size of sb read/written to appropriate amount

version-1 superblocks are not (normally) 4K long, and can be of variable size.
 Writing the full 4K can cause corruption (but only in non-default
configurations).

With this patch the super-block-flavour can choose a size to read, and set a
size to write based on what it finds.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>