* [PATCH openvswitch] linux: Signal datapath that unaligned Netlink message can be received
@ 2013-11-21 18:15 Thomas Graf
[not found] ` <48c93fb3c82bca0c9858ff528e2cf79d72d76082.1385057672.git.tgraf-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-11-25 23:41 ` Jesse Gross
0 siblings, 2 replies; 6+ messages in thread
From: Thomas Graf @ 2013-11-21 18:15 UTC (permalink / raw)
To: jesse; +Cc: dev, netdev
Following commit (''netlink: Do not enforce alignment of last Netlink
attribute''), signal the ability to receive unaligned Netlink messages
to the datapath to enable utilization of zerocopy optimizations.
Signed-off-by: Thomas Graf <tgraf@redhat.com>
---
include/linux/openvswitch.h | 15 ++++++++++++++-
lib/dpif-linux.c | 6 ++++++
2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/include/linux/openvswitch.h b/include/linux/openvswitch.h
index b429201..52dde86 100644
--- a/include/linux/openvswitch.h
+++ b/include/linux/openvswitch.h
@@ -60,7 +60,16 @@ struct ovs_header {
#define OVS_DATAPATH_FAMILY "ovs_datapath"
#define OVS_DATAPATH_MCGROUP "ovs_datapath"
-#define OVS_DATAPATH_VERSION 0x1
+
+/**
+ * V2:
+ * - API users are expected to provide OVS_DP_ATTR_USER_FEATURES
+ * with NLM_F_REPLACE when creating the datapath.
+ */
+#define OVS_DATAPATH_VERSION 2
+
+/* First OVS datapath version to support features */
+#define OVS_DP_VER_FEATURES 2
enum ovs_datapath_cmd {
OVS_DP_CMD_UNSPEC,
@@ -95,6 +104,7 @@ enum ovs_datapath_attr {
OVS_DP_ATTR_UPCALL_PID, /* Netlink PID to receive upcalls */
OVS_DP_ATTR_STATS, /* struct ovs_dp_stats */
OVS_DP_ATTR_MEGAFLOW_STATS, /* struct ovs_dp_megaflow_stats */
+ OVS_DP_ATTR_USER_FEATURES, /* OVS_DP_F_* */
__OVS_DP_ATTR_MAX
};
@@ -126,6 +136,9 @@ struct ovs_vport_stats {
__u64 tx_dropped; /* no space available in linux */
};
+/* Allow last Netlink attribute to be unaligned */
+#define OVS_DP_F_UNALIGNED (1 << 0)
+
/* Fixed logical ports. */
#define OVSP_LOCAL ((__u32)0)
diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
index 1dcf321..5c952bc 100644
--- a/lib/dpif-linux.c
+++ b/lib/dpif-linux.c
@@ -73,6 +73,7 @@ struct dpif_linux_dp {
/* Attributes. */
const char *name; /* OVS_DP_ATTR_NAME. */
const uint32_t *upcall_pid; /* OVS_DP_ATTR_UPCALL_PID. */
+ uint32_t user_features; /* OVS_DP_ATTR_USER_FEATURES */
struct ovs_dp_stats stats; /* OVS_DP_ATTR_STATS. */
struct ovs_dp_megaflow_stats megaflow_stats;
/* OVS_DP_ATTR_MEGAFLOW_STATS.*/
@@ -232,6 +233,7 @@ dpif_linux_open(const struct dpif_class *class OVS_UNUSED, const char *name,
dp_request.cmd = OVS_DP_CMD_GET;
}
dp_request.name = name;
+ dp_request.user_features |= OVS_DP_F_UNALIGNED;
error = dpif_linux_dp_transact(&dp_request, &dp, &buf);
if (error) {
return error;
@@ -1839,6 +1841,10 @@ dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf)
nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid);
}
+ if (dp->user_features) {
+ nl_msg_put_u32(buf, OVS_DP_ATTR_USER_FEATURES, dp->user_features);
+ }
+
/* Skip OVS_DP_ATTR_STATS since we never have a reason to serialize it. */
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH openvswitch] linux: Signal datapath that unaligned Netlink message can be received
[not found] ` <48c93fb3c82bca0c9858ff528e2cf79d72d76082.1385057672.git.tgraf-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
@ 2013-11-21 18:49 ` Sergei Shtylyov
[not found] ` <528E559C.4020201-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
0 siblings, 1 reply; 6+ messages in thread
From: Sergei Shtylyov @ 2013-11-21 18:49 UTC (permalink / raw)
To: Thomas Graf, jesse-l0M0P4e3n4LQT0dZR+AlfA
Cc: dev-yBygre7rU0TnMu66kgdUjQ, netdev-u79uwXL29TY76Z2rM5mHXA
Hello.
On 21-11-2013 22:15, Thomas Graf wrote:
> Following commit (''netlink: Do not enforce alignment of last Netlink
> attribute''), signal the ability to receive unaligned Netlink messages
> to the datapath to enable utilization of zerocopy optimizations.
> Signed-off-by: Thomas Graf <tgraf-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
[...]
> diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
> index 1dcf321..5c952bc 100644
> --- a/lib/dpif-linux.c
> +++ b/lib/dpif-linux.c
[...]
> @@ -1839,6 +1841,10 @@ dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf)
> nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid);
> }
>
> + if (dp->user_features) {
> + nl_msg_put_u32(buf, OVS_DP_ATTR_USER_FEATURES, dp->user_features);
> + }
> +
{} not needed here.
WBR, Sergei
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH openvswitch] linux: Signal datapath that unaligned Netlink message can be received
[not found] ` <528E559C.4020201-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
@ 2013-11-21 20:52 ` Ben Pfaff
2013-11-22 15:41 ` [ovs-dev] " Sergei Shtylyov
0 siblings, 1 reply; 6+ messages in thread
From: Ben Pfaff @ 2013-11-21 20:52 UTC (permalink / raw)
To: Sergei Shtylyov; +Cc: dev-yBygre7rU0TnMu66kgdUjQ, netdev-u79uwXL29TY76Z2rM5mHXA
On Thu, Nov 21, 2013 at 10:49:00PM +0400, Sergei Shtylyov wrote:
> On 21-11-2013 22:15, Thomas Graf wrote:
>
> >Following commit (''netlink: Do not enforce alignment of last Netlink
> >attribute''), signal the ability to receive unaligned Netlink messages
> >to the datapath to enable utilization of zerocopy optimizations.
>
> >Signed-off-by: Thomas Graf <tgraf-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> [...]
>
> >diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
> >index 1dcf321..5c952bc 100644
> >--- a/lib/dpif-linux.c
> >+++ b/lib/dpif-linux.c
> [...]
> >@@ -1839,6 +1841,10 @@ dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf)
> > nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid);
> > }
> >
> >+ if (dp->user_features) {
> >+ nl_msg_put_u32(buf, OVS_DP_ATTR_USER_FEATURES, dp->user_features);
> >+ }
> >+
>
> {} not needed here.
This is Open vSwitch code, so it follows Open vSwitch coding style,
which requires the {}.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ovs-dev] [PATCH openvswitch] linux: Signal datapath that unaligned Netlink message can be received
2013-11-21 20:52 ` Ben Pfaff
@ 2013-11-22 15:41 ` Sergei Shtylyov
0 siblings, 0 replies; 6+ messages in thread
From: Sergei Shtylyov @ 2013-11-22 15:41 UTC (permalink / raw)
To: Ben Pfaff; +Cc: Thomas Graf, jesse, dev, netdev
Hello.
On 22-11-2013 0:52, Ben Pfaff wrote:
>>> Following commit (''netlink: Do not enforce alignment of last Netlink
>>> attribute''), signal the ability to receive unaligned Netlink messages
>>> to the datapath to enable utilization of zerocopy optimizations.
>>> Signed-off-by: Thomas Graf <tgraf@redhat.com>
>> [...]
>>> diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
>>> index 1dcf321..5c952bc 100644
>>> --- a/lib/dpif-linux.c
>>> +++ b/lib/dpif-linux.c
>> [...]
>>> @@ -1839,6 +1841,10 @@ dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf)
>>> nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid);
>>> }
>>>
>>> + if (dp->user_features) {
>>> + nl_msg_put_u32(buf, OVS_DP_ATTR_USER_FEATURES, dp->user_features);
>>> + }
>>> +
>>
>> {} not needed here.
> This is Open vSwitch code,
I didn't put much attention at the file name or subject but the issue
seemed just too obvious...
> so it follows Open vSwitch coding style,
> which requires the {}.
Strange style. Oh well... :-)
WBR, Sergei
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH openvswitch] linux: Signal datapath that unaligned Netlink message can be received
2013-11-21 18:15 [PATCH openvswitch] linux: Signal datapath that unaligned Netlink message can be received Thomas Graf
[not found] ` <48c93fb3c82bca0c9858ff528e2cf79d72d76082.1385057672.git.tgraf-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
@ 2013-11-25 23:41 ` Jesse Gross
[not found] ` <CAEP_g=9Ax4A+eKZyUXhZhqFQ8Nyi5JeQzwyqJY=rVceKZHEHNw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
1 sibling, 1 reply; 6+ messages in thread
From: Jesse Gross @ 2013-11-25 23:41 UTC (permalink / raw)
To: Thomas Graf; +Cc: dev, netdev
On Thu, Nov 21, 2013 at 10:15 AM, Thomas Graf <tgraf@redhat.com> wrote:
> diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
> index 1dcf321..5c952bc 100644
> --- a/lib/dpif-linux.c
> +++ b/lib/dpif-linux.c
> @@ -232,6 +233,7 @@ dpif_linux_open(const struct dpif_class *class OVS_UNUSED, const char *name,
> dp_request.cmd = OVS_DP_CMD_GET;
> }
> dp_request.name = name;
> + dp_request.user_features |= OVS_DP_F_UNALIGNED;
Should we restrict this to just OVS_DP_CMD_NEW?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH openvswitch] linux: Signal datapath that unaligned Netlink message can be received
[not found] ` <CAEP_g=9Ax4A+eKZyUXhZhqFQ8Nyi5JeQzwyqJY=rVceKZHEHNw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
@ 2013-11-27 22:41 ` Thomas Graf
0 siblings, 0 replies; 6+ messages in thread
From: Thomas Graf @ 2013-11-27 22:41 UTC (permalink / raw)
To: Jesse Gross; +Cc: dev-yBygre7rU0TnMu66kgdUjQ, netdev
On 11/26/2013 12:41 AM, Jesse Gross wrote:
> On Thu, Nov 21, 2013 at 10:15 AM, Thomas Graf <tgraf-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
>> diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
>> index 1dcf321..5c952bc 100644
>> --- a/lib/dpif-linux.c
>> +++ b/lib/dpif-linux.c
>> @@ -232,6 +233,7 @@ dpif_linux_open(const struct dpif_class *class OVS_UNUSED, const char *name,
>> dp_request.cmd = OVS_DP_CMD_GET;
>> }
>> dp_request.name = name;
>> + dp_request.user_features |= OVS_DP_F_UNALIGNED;
>
> Should we restrict this to just OVS_DP_CMD_NEW?
I'm fine either way. We currently disregard user features in GET.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2013-11-21 18:15 [PATCH openvswitch] linux: Signal datapath that unaligned Netlink message can be received Thomas Graf
[not found] ` <48c93fb3c82bca0c9858ff528e2cf79d72d76082.1385057672.git.tgraf-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-11-21 18:49 ` Sergei Shtylyov
[not found] ` <528E559C.4020201-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
2013-11-21 20:52 ` Ben Pfaff
2013-11-22 15:41 ` [ovs-dev] " Sergei Shtylyov
2013-11-25 23:41 ` Jesse Gross
[not found] ` <CAEP_g=9Ax4A+eKZyUXhZhqFQ8Nyi5JeQzwyqJY=rVceKZHEHNw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-11-27 22:41 ` Thomas Graf
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