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| author | Eric Dumazet <edumazet@google.com> | 2014-03-07 12:02:33 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-03-10 13:56:26 -0400 |
| commit | 9063e21fb026c4966fc93261c18322214f9835eb (patch) | |
| tree | c63b6774f68574b9197fb083af77029d9d4e52c6 /net/netlink/af_netlink.h | |
| parent | cd84ff4da1f46cbdc2d73366eabe9a8f818447cd (diff) | |
| download | linux-9063e21fb026c4966fc93261c18322214f9835eb.tar.gz linux-9063e21fb026c4966fc93261c18322214f9835eb.tar.bz2 linux-9063e21fb026c4966fc93261c18322214f9835eb.zip | |
netlink: autosize skb lengthes
One known problem with netlink is the fact that NLMSG_GOODSIZE is
really small on PAGE_SIZE==4096 architectures, and it is difficult
to know in advance what buffer size is used by the application.
This patch adds an automatic learning of the size.
First netlink message will still be limited to ~4K, but if user used
bigger buffers, then following messages will be able to use up to 16KB.
This speedups dump() operations by a large factor and should be safe
for legacy applications.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Thomas Graf <tgraf@suug.ch>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink/af_netlink.h')
| -rw-r--r-- | net/netlink/af_netlink.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.h b/net/netlink/af_netlink.h index acbd774eeb7c..ed13a790b00e 100644 --- a/net/netlink/af_netlink.h +++ b/net/netlink/af_netlink.h @@ -31,6 +31,7 @@ struct netlink_sock { u32 ngroups; unsigned long *groups; unsigned long state; + size_t max_recvmsg_len; wait_queue_head_t wait; bool cb_running; struct netlink_callback cb; |