Johannes Berg ff4c92d85c
genetlink: introduce pre_doit/post_doit hooks ...
Each family may have some amount of boilerplate
locking code that applies to most, or even all,
commands.
This allows a family to handle such things in
a more generic way, by allowing it to
a) include private flags in each operation
b) specify a pre_doit hook that is called,
before an operation's doit() callback and
may return an error directly,
c) specify a post_doit hook that can undo
locking or similar things done by pre_doit,
and finally
d) include two private pointers in each info
struct passed between all these operations
including doit(). (It's two because I'll
need two in nl80211 -- can be extended.)
Signed-off-by: Johannes Berg <johannes.berg@intel.com >
Acked-by: David S. Miller <davem@davemloft.net >
Signed-off-by: John W. Linville <linville@tuxdriver.com >
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ff4c92d85c