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authorDavid S. Miller <davem@davemloft.net>2016-01-13 08:21:27 +0300
committerDavid S. Miller <davem@davemloft.net>2016-01-13 08:21:27 +0300
commitddb5388ffd0ad75d07e7b78181a0b579824ba6f0 (patch)
treebe1e2bd103c69d7bbace3fffd97bc3d714bbc3d7 /net/netlink
parentccdf6ce6a8dba374668ae9b4d763e19903611c38 (diff)
parent67990608c8b95d2b8ccc29932376ae73d5818727 (diff)
downloadlinux-ddb5388ffd0ad75d07e7b78181a0b579824ba6f0.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
Diffstat (limited to 'net/netlink')
-rw-r--r--net/netlink/af_netlink.c4
-rw-r--r--net/netlink/genetlink.c16
2 files changed, 20 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 59651af8cc27..81dc1bb6e016 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -2915,6 +2915,7 @@ int __netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
cb = &nlk->cb;
memset(cb, 0, sizeof(*cb));
+ cb->start = control->start;
cb->dump = control->dump;
cb->done = control->done;
cb->nlh = nlh;
@@ -2927,6 +2928,9 @@ int __netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
mutex_unlock(nlk->cb_mutex);
+ if (cb->start)
+ cb->start(cb);
+
ret = netlink_dump(sk);
sock_put(sk);
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index a992083c0a64..d3f6b063467b 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -513,6 +513,20 @@ void *genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
}
EXPORT_SYMBOL(genlmsg_put);
+static int genl_lock_start(struct netlink_callback *cb)
+{
+ /* our ops are always const - netlink API doesn't propagate that */
+ const struct genl_ops *ops = cb->data;
+ int rc = 0;
+
+ if (ops->start) {
+ genl_lock();
+ rc = ops->start(cb);
+ genl_unlock();
+ }
+ return rc;
+}
+
static int genl_lock_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
/* our ops are always const - netlink API doesn't propagate that */
@@ -577,6 +591,7 @@ static int genl_family_rcv_msg(struct genl_family *family,
.module = family->module,
/* we have const, but the netlink API doesn't */
.data = (void *)ops,
+ .start = genl_lock_start,
.dump = genl_lock_dumpit,
.done = genl_lock_done,
};
@@ -588,6 +603,7 @@ static int genl_family_rcv_msg(struct genl_family *family,
} else {
struct netlink_dump_control c = {
.module = family->module,
+ .start = ops->start,
.dump = ops->dumpit,
.done = ops->done,
};