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netlink: add a start callback for starting a netlink dump

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The start callback allows the caller to set up a context for the
dump callbacks. Presumably, the context can then be destroyed in
the done callback.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert
2015-12-15 15:41:37 -08:00
committed by David S. Miller
parent 3502cad73c
commit fc9e50f5a5
4 changed files with 24 additions and 0 deletions
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2
include/net/genetlink.h
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@@ -114,6 +114,7 @@ static inline void genl_info_net_set(struct genl_info *info, struct net *net)
* @flags: flags
* @policy: attribute validation policy
* @doit: standard command callback
* @start: start callback for dumps
* @dumpit: callback for dumpers
* @done: completion callback for dumps
* @ops_list: operations list
@@ -122,6 +123,7 @@ struct genl_ops {
const struct nla_policy *policy;
int (*doit)(struct sk_buff *skb,
struct genl_info *info);
int (*start)(struct netlink_callback *cb);
int (*dumpit)(struct sk_buff *skb,
struct netlink_callback *cb);
int (*done)(struct netlink_callback *cb);