[PATCH] Add flow control to the portmapper
DORMANTno replies
From: Shiraz Saleem <hidden>
Date: 2016-07-15 16:59:57
Subsystem:
infiniband subsystem, networking [general], the rest · Maintainers:
Jason Gunthorpe, Leon Romanovsky, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Mustafa Ismail <redacted> Add flow control to port-mapper by changing ibnl unicast to use netlink messaging with blocking. Signed-off-by: Faisal Latif <redacted> Signed-off-by: Mustafa Ismail <redacted> Signed-off-by: Shiraz Saleem <redacted> --- drivers/infiniband/core/netlink.c | 4 ++-- include/net/netlink.h | 17 +++++++++++++++++ 2 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/core/netlink.c b/drivers/infiniband/core/netlink.c
index 9b8c20c..6b09580 100644
--- a/drivers/infiniband/core/netlink.c
+++ b/drivers/infiniband/core/netlink.c@@ -229,7 +229,7 @@ static void ibnl_rcv(struct sk_buff *skb) int ibnl_unicast(struct sk_buff *skb, struct nlmsghdr *nlh, __u32 pid) { - return nlmsg_unicast(nls, skb, pid); + return nlmsg_unicast_block(nls, skb, pid); } EXPORT_SYMBOL(ibnl_unicast);
@@ -251,7 +251,7 @@ int __init ibnl_init(void) pr_warn("Failed to create netlink socket\n"); return -ENOMEM; } - + nls->sk_sndtimeo = 10 * HZ; return 0; }
diff --git a/include/net/netlink.h b/include/net/netlink.h
index 254a0fc..5434279 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h@@ -598,6 +598,23 @@ static inline int nlmsg_unicast(struct sock *sk, struct sk_buff *skb, u32 portid } /** + * nlmsg_unicast_block - unicast a netlink message with blocking + * @sk: netlink socket to spread message to + * @skb: netlink message as socket buffer + * @portid: netlink portid of the destination socket + */ +static inline int nlmsg_unicast_block(struct sock *sk, struct sk_buff *skb, u32 portid) +{ + int err; + + err = netlink_unicast(sk, skb, portid, 0); + if (err > 0) + err = 0; + + return err; +} + +/** * nlmsg_for_each_msg - iterate over a stream of messages * @pos: loop counter, set to current message * @head: head of message stream
--
2.8.0
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