Messages in this thread | | | Date | Wed, 22 Jan 2014 16:32:08 +0100 | From | Daniel Borkmann <> | Subject | Re: [PATCH 1/1] Per socket value for max datagram queue length |
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On 01/22/2014 04:11 PM, Dan Ballard wrote: > Provides a new option for setsockopt SO_MAX_DGRAM_QLEN that sets and > gets a socket specific max datagram queue length. Currently each socket > has one but it's only ever initialized from > /proc/sys/net/unix/max_dgram_qlen and then never adjustable later. Now > each socket can have it individually tweaked during it's life. > > Signed-off-by: Dan Ballard <dan@mindstab.net> > --- > include/uapi/asm-generic/socket.h | 2 ++ > net/core/sock.c | 7 +++++++ > 2 files changed, 9 insertions(+) > > diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h > index 38f14d0..f8c3e6b 100644 > --- a/include/uapi/asm-generic/socket.h > +++ b/include/uapi/asm-generic/socket.h > @@ -80,4 +80,6 @@ > > #define SO_MAX_PACING_RATE 47 > > +#define SO_MAX_DGRAM_QLEN 48 > +
This needs to be added in more than just asm-generic, e.g. have a look at SO_MAX_PACING_RATE or SO_BPF_EXTENSIONS.
Also you might need to rebase to current net-next head and maybe describe use cases more in-depth; next to what Hannes just commented.
> #endif /* __ASM_GENERIC_SOCKET_H */ > diff --git a/net/core/sock.c b/net/core/sock.c > index 5393b4b..1ff69d1 100644 > --- a/net/core/sock.c > +++ b/net/core/sock.c > @@ -915,6 +915,10 @@ set_rcvbuf: > sk->sk_max_pacing_rate); > break; > > + case SO_MAX_DGRAM_QLEN: > + sk->sk_max_ack_backlog = val; > + break; > + > default: > ret = -ENOPROTOOPT; > break; > @@ -1182,6 +1186,9 @@ int sock_getsockopt(struct socket *sock, int level, int optname, > v.val = sk->sk_max_pacing_rate; > break; > > + case SO_MAX_DGRAM_QLEN: > + v.val = sk->sk_max_ack_backlog; > + break; > default: > return -ENOPROTOOPT; > }
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