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authorThomas Graf <tgraf@suug.ch>2006-08-15 00:31:41 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-22 14:54:50 -0700
commit97676b6b5538b3e059d33b8338e7d5cc41c5f1f1 (patch)
tree76e41eb58bd86a96e204dacbb6746da387e67452 /include/net/netlink.h
parentd387f6ad10764fc2174373b4a1cca443adee36e3 (diff)
[RTNETLINK]: Add rtnetlink notification interface
Adds rtnl_notify() to send rtnetlink notification messages and rtnl_set_sk_err() to report notification errors as socket errors in order to indicate the need of a resync due to loss of events. nlmsg_report() is added to properly document the meaning of NLM_F_ECHO. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/netlink.h')
-rw-r--r--include/net/netlink.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/net/netlink.h b/include/net/netlink.h
index b154b81d9a7a..bf593eb59e1b 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -65,6 +65,9 @@
* nlmsg_validate() validate netlink message incl. attrs
* nlmsg_for_each_attr() loop over all attributes
*
+ * Misc:
+ * nlmsg_report() report back to application?
+ *
* ------------------------------------------------------------------------
* Attributes Interface
* ------------------------------------------------------------------------
@@ -194,6 +197,9 @@ extern void netlink_run_queue(struct sock *sk, unsigned int *qlen,
struct nlmsghdr *, int *));
extern void netlink_queue_skip(struct nlmsghdr *nlh,
struct sk_buff *skb);
+extern int nlmsg_notify(struct sock *sk, struct sk_buff *skb,
+ u32 pid, unsigned int group, int report,
+ gfp_t flags);
extern int nla_validate(struct nlattr *head, int len, int maxtype,
struct nla_policy *policy);
@@ -376,6 +382,17 @@ static inline int nlmsg_validate(struct nlmsghdr *nlh, int hdrlen, int maxtype,
}
/**
+ * nlmsg_report - need to report back to application?
+ * @nlh: netlink message header
+ *
+ * Returns 1 if a report back to the application is requested.
+ */
+static inline int nlmsg_report(struct nlmsghdr *nlh)
+{
+ return !!(nlh->nlmsg_flags & NLM_F_ECHO);
+}
+
+/**
* nlmsg_for_each_attr - iterate over a stream of attributes
* @pos: loop counter, set to current attribute
* @nlh: netlink message header