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genetlink: allow dumping command-specific policy

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Right now CTRL_CMD_GETPOLICY can only dump the family-wide
policy. Support dumping policy of a specific op.

v3:
 - rebase after per-op policy export and handle that
v2:
 - make cmd U32, just in case.
v1:
 - don't echo op in the output in a naive way, this should
   make it cleaner to extend the output format for dumping
   policies for all the commands at once in the future.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20201001225933.1373426-11-kuba@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2020-10-03 10:44:46 +02:00 • committed by David S. Miller
parent 50a896cf2d
commit e992a6eda9
2 changed files with 37 additions and 5 deletions
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1
include/uapi/linux/genetlink.h
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@ -65,6 +65,7 @@ enum {
CTRL_ATTR_MCAST_GROUPS,
CTRL_ATTR_POLICY,
CTRL_ATTR_OP_POLICY,
CTRL_ATTR_OP,
__CTRL_ATTR_MAX,
};