* [PATCH net-next v3 1/3] bridge: add new BR_NEIGH_SUPPRESS port flag to suppress arp and nd flood
From: Roopa Prabhu @ 2017-10-04 4:43 UTC (permalink / raw)
To: davem; +Cc: netdev, nikolay, stephen, bridge
In-Reply-To: <1507092235-39876-1-git-send-email-roopa@cumulusnetworks.com>
From: Roopa Prabhu <roopa@cumulusnetworks.com>
This patch adds a new bridge port flag BR_NEIGH_SUPPRESS to
suppress arp and nd flood on bridge ports. It implements
rfc7432, section 10.
https://tools.ietf.org/html/rfc7432#section-10
for ethernet VPN deployments. It is similar to the existing
BR_ARP_PROXY flag but has a few semantic differences to conform
to EVPN standard. In case of EVPN, it is mainly used to
avoid flooding to tunnel ports like vxlan. Unlike the existing
flags it suppresses flood of all neigh discovery packets
(arp, nd) to tunnel ports.
This patch adds netlink and sysfs support to set this bridge port
flag.
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
---
include/linux/if_bridge.h | 1 +
include/uapi/linux/if_link.h | 1 +
net/bridge/Makefile | 2 +-
net/bridge/br_arp_nd_proxy.c | 32 ++++++++++++++++++++++++++++++++
net/bridge/br_forward.c | 3 ++-
net/bridge/br_if.c | 5 +++++
net/bridge/br_netlink.c | 12 +++++++++++-
net/bridge/br_private.h | 2 ++
net/bridge/br_sysfs_if.c | 2 ++
9 files changed, 57 insertions(+), 3 deletions(-)
create mode 100644 net/bridge/br_arp_nd_proxy.c
diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
index 3cd18ac..316ee11 100644
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -49,6 +49,7 @@ struct br_ip_list {
#define BR_MULTICAST_TO_UNICAST BIT(12)
#define BR_VLAN_TUNNEL BIT(13)
#define BR_BCAST_FLOOD BIT(14)
+#define BR_NEIGH_SUPPRESS BIT(15)
#define BR_DEFAULT_AGEING_TIME (300 * HZ)
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index ea87bd7..0d51f4f 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -326,6 +326,7 @@ enum {
IFLA_BRPORT_VLAN_TUNNEL,
IFLA_BRPORT_BCAST_FLOOD,
IFLA_BRPORT_GROUP_FWD_MASK,
+ IFLA_BRPORT_NEIGH_SUPPRESS,
__IFLA_BRPORT_MAX
};
#define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
diff --git a/net/bridge/Makefile b/net/bridge/Makefile
index 40b1ede..4aee55f 100644
--- a/net/bridge/Makefile
+++ b/net/bridge/Makefile
@@ -7,7 +7,7 @@ obj-$(CONFIG_BRIDGE) += bridge.o
bridge-y := br.o br_device.o br_fdb.o br_forward.o br_if.o br_input.o \
br_ioctl.o br_stp.o br_stp_bpdu.o \
br_stp_if.o br_stp_timer.o br_netlink.o \
- br_netlink_tunnel.o
+ br_netlink_tunnel.o br_arp_nd_proxy.o
bridge-$(CONFIG_SYSFS) += br_sysfs_if.o br_sysfs_br.o
diff --git a/net/bridge/br_arp_nd_proxy.c b/net/bridge/br_arp_nd_proxy.c
new file mode 100644
index 0000000..f889ad5
--- /dev/null
+++ b/net/bridge/br_arp_nd_proxy.c
@@ -0,0 +1,32 @@
+/*
+ * Handle bridge arp/nd proxy/suppress
+ *
+ * Copyright (C) 2017 Cumulus Networks
+ * Copyright (c) 2017 Roopa Prabhu <roopa@cumulusnetworks.com>
+ *
+ * Authors:
+ * Roopa Prabhu <roopa@cumulusnetworks.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include "br_private.h"
+
+void br_recalculate_neigh_suppress_enabled(struct net_bridge *br)
+{
+ struct net_bridge_port *p;
+ bool neigh_suppress = false;
+
+ list_for_each_entry(p, &br->port_list, list) {
+ if (p->flags & BR_NEIGH_SUPPRESS) {
+ neigh_suppress = true;
+ break;
+ }
+ }
+
+ br->neigh_suppress_enabled = neigh_suppress;
+}
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 48fb174..7a50dc5 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -204,7 +204,8 @@ void br_flood(struct net_bridge *br, struct sk_buff *skb,
/* Do not flood to ports that enable proxy ARP */
if (p->flags & BR_PROXYARP)
continue;
- if ((p->flags & BR_PROXYARP_WIFI) &&
+ if ((p->flags & BR_PROXYARP_WIFI ||
+ p->flags & BR_NEIGH_SUPPRESS) &&
BR_INPUT_SKB_CB(skb)->proxyarp_replied)
continue;
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index f3aef22..8f615d4 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -310,6 +310,8 @@ void br_dev_delete(struct net_device *dev, struct list_head *head)
del_nbp(p);
}
+ br_recalculate_neigh_suppress_enabled(br);
+
br_fdb_delete_by_port(br, NULL, 0, 1);
cancel_delayed_work_sync(&br->gc_work);
@@ -653,4 +655,7 @@ void br_port_flags_change(struct net_bridge_port *p, unsigned long mask)
if (mask & BR_AUTO_MASK)
nbp_update_port_count(br);
+
+ if (mask & BR_NEIGH_SUPPRESS)
+ br_recalculate_neigh_suppress_enabled(br);
}
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index dea88a2..d8c2706 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -138,6 +138,7 @@ static inline size_t br_port_info_size(void)
+ nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
+ nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
+ nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */
+ + nla_total_size(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */
+ nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
+ nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
+ nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
@@ -210,7 +211,9 @@ static int br_port_fill_attrs(struct sk_buff *skb,
nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
BR_VLAN_TUNNEL)) ||
- nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask))
+ nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
+ nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS, !!(p->flags &
+ BR_NEIGH_SUPPRESS)))
return -EMSGSIZE;
timerval = br_timer_value(&p->message_age_timer);
@@ -692,6 +695,7 @@ static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
{
unsigned long old_flags = p->flags;
bool br_vlan_tunnel_old = false;
+ int neigh_suppress_old = 0;
int err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
@@ -785,6 +789,12 @@ static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
p->group_fwd_mask = fwd_mask;
}
+ neigh_suppress_old = (p->flags & BR_NEIGH_SUPPRESS);
+ br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
+ BR_NEIGH_SUPPRESS);
+ if (neigh_suppress_old != (p->flags & BR_NEIGH_SUPPRESS))
+ br_recalculate_neigh_suppress_enabled(p->br);
+
br_port_flags_change(p, old_flags ^ p->flags);
return 0;
}
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 020c709..f47332e 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -404,6 +404,7 @@ struct net_bridge {
#ifdef CONFIG_NET_SWITCHDEV
int offload_fwd_mark;
#endif
+ bool neigh_suppress_enabled;
};
struct br_input_skb_cb {
@@ -1138,4 +1139,5 @@ static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
}
#endif /* CONFIG_NET_SWITCHDEV */
+void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
#endif
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 9110d5e..0a1fa9c 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -191,6 +191,7 @@ BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
BRPORT_ATTR_FLAG(multicast_flood, BR_MCAST_FLOOD);
BRPORT_ATTR_FLAG(broadcast_flood, BR_BCAST_FLOOD);
+BRPORT_ATTR_FLAG(neigh_suppress, BR_NEIGH_SUPPRESS);
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
@@ -241,6 +242,7 @@ static const struct brport_attribute *brport_attrs[] = {
&brport_attr_multicast_flood,
&brport_attr_broadcast_flood,
&brport_attr_group_fwd_mask,
+ &brport_attr_neigh_suppress,
NULL
};
--
2.1.4
^ permalink raw reply related
* [PATCH net-next v3 0/3] bridge: neigh msg proxy and flood suppression support
From: Roopa Prabhu @ 2017-10-04 4:43 UTC (permalink / raw)
To: davem; +Cc: netdev, nikolay, stephen, bridge
From: Roopa Prabhu <roopa@cumulusnetworks.com>
This series implements arp and nd suppression in the bridge
driver for ethernet vpns. It implements rfc7432, section 10
https://tools.ietf.org/html/rfc7432#section-10
for ethernet VPN deployments. It is similar to the existing
BR_ARP_PROXY flag but has a few semantic differences to conform
to EVPN standard. In case of EVPN, it is mainly used to avoid flooding to
tunnel ports like vxlan. Unlike the existing flags it suppresses flood
of all neigh discovery packets (arp, nd) to tunnel ports.
v2 : rebase to latest + address some optimization feedback from Nikolay.
v3 : fix kbuild reported build errors with CONFIG_INET off
Roopa Prabhu (3):
bridge: add new BR_NEIGH_SUPPRESS port flag to suppress arp and nd
flood
neigh arp suppress first
bridge: suppress nd messages from going to BR_NEIGH_SUPPRESS ports
include/linux/if_bridge.h | 1 +
include/uapi/linux/if_link.h | 1 +
net/bridge/Makefile | 2 +-
net/bridge/br_arp_nd_proxy.c | 492 +++++++++++++++++++++++++++++++++++++++++++
net/bridge/br_device.c | 18 ++
net/bridge/br_forward.c | 3 +-
net/bridge/br_if.c | 5 +
net/bridge/br_input.c | 73 ++-----
net/bridge/br_netlink.c | 16 +-
net/bridge/br_private.h | 9 +
net/bridge/br_sysfs_if.c | 2 +
11 files changed, 561 insertions(+), 61 deletions(-)
create mode 100644 net/bridge/br_arp_nd_proxy.c
--
2.1.4
^ permalink raw reply
* Re: [PATCH] fsl/fman: remove of_node
From: David Miller @ 2017-10-04 4:43 UTC (permalink / raw)
To: madalin.bucur; +Cc: netdev, andrew, f.fainelli, linux-kernel
In-Reply-To: <AM5PR0402MB26914CBD37E3F28C17562258EC720@AM5PR0402MB2691.eurprd04.prod.outlook.com>
From: Madalin-cristian Bucur <madalin.bucur@nxp.com>
Date: Tue, 3 Oct 2017 08:49:31 +0000
> My patch removes the of_node that was set to a device that was not an
> of_device, preventing duplicated probing of both the real of_device
> and the "fake" one created through this assignment.
>
> I understand that the DSA issue that triggered the initial change
> was related to DSA finding the network devices using
> of_find_net_device_by_node(), something that will not work for the
> DPAA case where the netdevice does not have an of_node. I do not know
> enough about DSA to come up with a solution for this problem now.
> Andrew, Florian, can you please comment on this?
It sounds like you're knowingly breaking DSA.
^ permalink raw reply
* Re: [PATCH net-next] cxgb4: add new T6 pci device id's
From: David Miller @ 2017-10-04 4:42 UTC (permalink / raw)
To: ganeshgr; +Cc: netdev, nirranjan, indranil, venkatesh
In-Reply-To: <1507009253-6686-1-git-send-email-ganeshgr@chelsio.com>
From: Ganesh Goudar <ganeshgr@chelsio.com>
Date: Tue, 3 Oct 2017 11:10:53 +0530
> Add 0x6085 T6 device id.
>
> Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Applied, thank you.
^ permalink raw reply
* Re: [PATCH RESEND net 0/9] Fixes, cleanup and modernization for some legacy ethernet NIC drivers
From: David Miller @ 2017-10-04 4:41 UTC (permalink / raw)
To: fthain; +Cc: netdev, linux-kernel
In-Reply-To: <cover.1506992619.git.fthain@telegraphics.com.au>
From: Finn Thain <fthain@telegraphics.com.au>
Date: Mon, 2 Oct 2017 21:07:17 -0400 (EDT)
> This patch series fixes some logging bugs and adds some missing message
> severity levels.
>
> There are also cleanup patches for dead code and some Kconfig cruft.
>
> Custom debug message logging is converted to netif_* calls to reduce
> code duplication.
>
> All up, about 150 lines of code are eliminated.
>
> My apologies for duplicated messages. I messed up the addressing.
Finn, I'm finding real bugs in this series and seriously if you cannot
test these changes in some way please leave this code alone.
For example, you're removing the "once_is_enough" logic from
mac89x0_probe().
But you can't do that. The probe function can in fact be called
multiple times, from drivers/net/Space.c It gets called in a loop
iterating over different 'unit' argument values.
Unless you're making stylistic changes where you can prove the object
code resulting is still the same, you really should not be playing
with fire by trying to remove "dead code" like this in legacy drivers
you cannot fully test.
Thank you.
^ permalink raw reply
* Re: [PATCH net] net: fib_rules: Fix fib_rules_ops->compare implementations to support exact match
From: David Ahern @ 2017-10-04 4:40 UTC (permalink / raw)
To: Eyal Birger, David Miller
Cc: shmulik, netdev@vger.kernel.org, mateusz.bajorski, tgraf,
Shmulik Ladkani
In-Reply-To: <CAHsH6Gstsm7smQZ3A0qxfSsWvquT4HrLmMRzGae9L2Wcm7-Bbg@mail.gmail.com>
On 10/3/17 8:58 PM, Eyal Birger wrote:
> Hi David,
>
> On Wed, Oct 4, 2017 at 12:54 AM, David Miller <davem@davemloft.net> wrote:
>> From: Shmulik Ladkani <shmulik@nsof.io>
>> Date: Sat, 30 Sep 2017 11:59:09 +0300
>>
>>> This leads to inconsistencies, depending on order of operations, e.g.:
>>
>> I don't see any inconsistency. When you insert using NLM_F_EXCL the
>> insertion fails if any existing rule matches or overlaps in any way
>> with the keys in the new rule.
>>
>> Sorry I'm not going to apply this.
>
> The inconsistency we saw is that 0.0.0.0/0 is treated differently compared to
> all other subnets - for which overlaps are not disallowed - e.g. this succeeds:
>
> # ip ru add from 10.0.0.0/8 iif eth2 pref 33 table 33
> # ip ru add from 0.0.0.0/1 iif eth2 pref 33 table 33
> # ip ru add from 128.0.0.0/1 iif eth2 pref 33 table 33
>
> Though being functionally equivalent to adding from=0.0.0.0/0.
>
> So our understanding was that 'different subnet==different rule', similar to the
> route addition behavior with NLM_F_EXCL.
>
I agree with DaveM ... your "non-working" sequence has a specific entry
followed by a global, match all entry.
^ permalink raw reply
* Re: [PATCH net-next v2 0/3] tools: add bpftool
From: David Miller @ 2017-10-04 4:33 UTC (permalink / raw)
To: jakub.kicinski; +Cc: netdev, daniel, alexei.starovoitov, oss-drivers
In-Reply-To: <20171002231130.12406-1-jakub.kicinski@netronome.com>
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Mon, 2 Oct 2017 16:11:27 -0700
> Hi!
>
> This set adds bpftool to the tools/ directory. The first
> patch renames tools/net to tools/bpf, the second one adds
> the new code, while the third adds simple documentation.
>
> v2:
> - report names, map ids, load time, uid;
> - add docs/man pages;
> - general cleanups & fixes.
>
> Thanks to David Beckett for help with docs and testing.
I think, at the very least, the doc change requests deserve one more
respin.
Thanks.
^ permalink raw reply
* Re: [PATCH net-next 1/2] tcp: uniform the set up of sockets after successful connection
From: David Miller @ 2017-10-04 4:28 UTC (permalink / raw)
To: weiwan; +Cc: netdev, ycheng, ncardwell, edumazet
In-Reply-To: <20171002170135.106183-1-tracywwnj@gmail.com>
From: Wei Wang <weiwan@google.com>
Date: Mon, 2 Oct 2017 10:01:35 -0700
> @@ -456,6 +456,19 @@ void tcp_init_sock(struct sock *sk)
> }
> EXPORT_SYMBOL(tcp_init_sock);
>
> +void tcp_init_transfer(struct sock *sk, int bpf_op)
> +{
> + struct inet_connection_sock *icsk = inet_csk(sk);
> +
> + tcp_mtup_init(sk);
> + icsk->icsk_af_ops->rebuild_header(sk);
> + tcp_init_metrics(sk);
> + tcp_call_bpf(sk, bpf_op);
> + tcp_init_congestion_control(sk);
> + tcp_init_buffer_space(sk);
> +}
> +EXPORT_SYMBOL(tcp_init_transfer);
This symbol export is unnecessary, and if it were it should
be EXPORT_SYMBOL_GPL().
^ permalink raw reply
* Re: [PATCH net-next v2 0/2] libbpf: support more map options
From: David Miller @ 2017-10-04 4:26 UTC (permalink / raw)
To: kraigatgoog; +Cc: ast, daniel, brouer, chonggangli, netdev
In-Reply-To: <20171002164129.47986-1-kraigatgoog@gmail.com>
From: Craig Gallek <kraigatgoog@gmail.com>
Date: Mon, 2 Oct 2017 12:41:27 -0400
> From: Craig Gallek <kraig@google.com>
>
> The functional change to this series is the ability to use flags when
> creating maps from object files loaded by libbpf. In order to do this,
> the first patch updates the library to handle map definitions that
> differ in size from libbpf's struct bpf_map_def.
>
> For object files with a larger map definition, libbpf will continue to load
> if the unknown fields are all zero, otherwise the map is rejected. If the
> map definition in the object file is smaller than expected, libbpf will use
> zero as a default value in the missing fields.
Judging by the feedback I anticipate another spin of this series.
^ permalink raw reply
* Re: [PATCH net] RDS: IB: Limit the scope of has_fr/has_fmr variables
From: David Miller @ 2017-10-04 4:06 UTC (permalink / raw)
To: santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
Cc: avinash.repaka-QHcLZuEGTsvQT0dZR+AlfA,
netdev-u79uwXL29TY76Z2rM5mHXA, linux-rdma-u79uwXL29TY76Z2rM5mHXA,
rds-devel-N0ozoZBvEnrZJqsBc5GL+g,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
In-Reply-To: <d1f841a7-0c1d-9d20-ee33-6e260b5d84c4-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
From: Santosh Shilimkar <santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
Date: Tue, 3 Oct 2017 17:42:39 -0700
> Hi Dave,
>
> On 10/2/2017 1:30 PM, Santosh Shilimkar wrote:
>> On 10/1/2017 10:56 PM, David Miller wrote:
>>> From: David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
> [...]
>
>>>
>>> Actually, reverted, this breaks the build.
>>>
>>> net/rds/rdma_transport.c:38:10: fatal error: ib.h: No such file or
>>> directory
>>> #include "ib.h"
>>>
>>> Although I can't see how in the world this patch is causing such
>>> an error.
>>>
>> Weird indeed. Will sort this out with Avinash. Thanks Dave.
>>
> I tried few build combinations on net-next but couldn't
> reproduce the build failure. AFAIU, the build error can only
> happen if for some reason the ib.h file got deleted
> accidentally. I did delete ib.h file and saw below error
>
> CC [M] net/rds/rdma_transport.o
> net/rds/rdma_transport.c:38:16: error: ib.h: No such file or directory
>
> Could it be the case for some reason the ib.h file got
> deleted or mangled while applying the $subject patch ?
Please post the patch again, I will try to sort it out.
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^ permalink raw reply
* Re: [PATCH net] net: fib_rules: Fix fib_rules_ops->compare implementations to support exact match
From: Eyal Birger @ 2017-10-04 3:58 UTC (permalink / raw)
To: David Miller
Cc: shmulik, netdev@vger.kernel.org, mateusz.bajorski, dsa, tgraf,
Shmulik Ladkani
In-Reply-To: <20171003.145418.677435703318514230.davem@davemloft.net>
Hi David,
On Wed, Oct 4, 2017 at 12:54 AM, David Miller <davem@davemloft.net> wrote:
> From: Shmulik Ladkani <shmulik@nsof.io>
> Date: Sat, 30 Sep 2017 11:59:09 +0300
>
>> This leads to inconsistencies, depending on order of operations, e.g.:
>
> I don't see any inconsistency. When you insert using NLM_F_EXCL the
> insertion fails if any existing rule matches or overlaps in any way
> with the keys in the new rule.
>
> Sorry I'm not going to apply this.
The inconsistency we saw is that 0.0.0.0/0 is treated differently compared to
all other subnets - for which overlaps are not disallowed - e.g. this succeeds:
# ip ru add from 10.0.0.0/8 iif eth2 pref 33 table 33
# ip ru add from 0.0.0.0/1 iif eth2 pref 33 table 33
# ip ru add from 128.0.0.0/1 iif eth2 pref 33 table 33
Though being functionally equivalent to adding from=0.0.0.0/0.
So our understanding was that 'different subnet==different rule', similar to the
route addition behavior with NLM_F_EXCL.
Best regards,
Eyal.
^ permalink raw reply
* Re: [next-queue PATCH v3 2/4] net/sched: Fix accessing invalid dev_queue
From: Eric Dumazet @ 2017-10-04 3:47 UTC (permalink / raw)
To: Vinicius Costa Gomes
Cc: netdev, intel-wired-lan, Jesus Sanchez-Palencia, jhs,
xiyou.wangcong, jiri, andre.guedes, ivan.briano, boon.leong.ong,
richardcochran, henrik, levipearson, rodney.cummings
In-Reply-To: <20171003234435.8979-3-vinicius.gomes@intel.com>
On Tue, 2017-10-03 at 16:44 -0700, Vinicius Costa Gomes wrote:
> From: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
>
> In qdisc_alloc() the dev_queue pointer was used without any checks being
> performed. If qdisc_create() gets a null dev_queue pointer, it just
> passes it along to qdisc_alloc(), leading to a crash. That happens if a
> root qdisc implements select_queue() and returns a null dev_queue
> pointer for an "invalid handle", for example.
>
> One way to reproduce that is:
>
> 1) Setup mqprio
> $ tc qdisc replace dev enp3s0 parent root mqprio num_tc 3 \
> map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 0
>
> 2) Replace the first inner qdisc
> $ tc qdisc replace dev enp3s0 parent 8001:1 pfifo_fast
>
> This will lead to the following crash:
When was this bug added ?
If this is a consequence of your prior patch (1/4), then this must come
before it.
No need to add a stack trace for a not existing bug.
Instead, explain in the changelog that it is a prep work.
We try to not break the tree on purpose, so that future bisection will
not hit a point where the kernel crashes.
^ permalink raw reply
* Re: [RFC] bpf: remove global verifier state
From: Alexei Starovoitov @ 2017-10-04 3:43 UTC (permalink / raw)
To: Eric Dumazet
Cc: Jakub Kicinski, daniel, dsahern, netdev, oss-drivers,
david.beckett
In-Reply-To: <1507087446.8061.37.camel@edumazet-glaptop3.roam.corp.google.com>
On Tue, Oct 03, 2017 at 08:24:06PM -0700, Eric Dumazet wrote:
> On Tue, 2017-10-03 at 19:52 -0700, Alexei Starovoitov wrote:
>
> > yep. looks great.
> > Please test it and submit officially :)
> > The commit aafe6ae9cee3 ("bpf: dynamically allocate digest scratch buffer")
> > fixed the other case where we were relying on the above mutex.
> > The only other spot to be adjusted is to add spin_lock/mutex or DO_ONCE() to
> > bpf_get_skb_set_tunnel_proto() to protect md_dst init.
> > imo that would be it.
> > Daniel, anything else comes to mind?
>
>
> 16 MB of log (unswappable kernel memory) per active checker.
>
> We might offer a way to oom hosts.
right. good point!
we need to switch to continuous copy_to_user() after a page or so.
Can even do it after every vscnprintf()
but page at a time is probably faster.
^ permalink raw reply
* Re: [RFC] bpf: remove global verifier state
From: Eric Dumazet @ 2017-10-04 3:24 UTC (permalink / raw)
To: Alexei Starovoitov
Cc: Jakub Kicinski, daniel, dsahern, netdev, oss-drivers,
david.beckett
In-Reply-To: <20171004025226.wutfwm6hcsj4zuph@ast-mbp>
On Tue, 2017-10-03 at 19:52 -0700, Alexei Starovoitov wrote:
> yep. looks great.
> Please test it and submit officially :)
> The commit aafe6ae9cee3 ("bpf: dynamically allocate digest scratch buffer")
> fixed the other case where we were relying on the above mutex.
> The only other spot to be adjusted is to add spin_lock/mutex or DO_ONCE() to
> bpf_get_skb_set_tunnel_proto() to protect md_dst init.
> imo that would be it.
> Daniel, anything else comes to mind?
16 MB of log (unswappable kernel memory) per active checker.
We might offer a way to oom hosts.
^ permalink raw reply
* Re: [RFC] bpf: remove global verifier state
From: Alexei Starovoitov @ 2017-10-04 2:52 UTC (permalink / raw)
To: Jakub Kicinski; +Cc: daniel, dsahern, netdev, oss-drivers, david.beckett
In-Reply-To: <20171004002025.28521-1-jakub.kicinski@netronome.com>
On Tue, Oct 03, 2017 at 05:20:25PM -0700, Jakub Kicinski wrote:
> The only global state protected by the verifier lock is
> the verifier log. Move that log to struct bpf_verifier_env
> and allow verification of multiple programs in parallel.
>
> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
> ---
> Like this? :)
>
> Compile-tested, I'm rebasing things and will test shortly.
>
> include/linux/bpf_verifier.h | 5 +
> kernel/bpf/verifier.c | 520 ++++++++++++++++++++++---------------------
> 2 files changed, 276 insertions(+), 249 deletions(-)
>
> diff --git a/include/linux/bpf_verifier.h b/include/linux/bpf_verifier.h
> index b8d200f60a40..598802dd1897 100644
> --- a/include/linux/bpf_verifier.h
> +++ b/include/linux/bpf_verifier.h
> @@ -139,6 +139,11 @@ struct bpf_verifier_env {
> bool allow_ptr_leaks;
> bool seen_direct_write;
> struct bpf_insn_aux_data *insn_aux_data; /* array of per-insn state */
> +
> + u32 log_level;
> + u32 log_size;
> + u32 log_len;
> + char *log_buf;
> };
>
> int bpf_analyzer(struct bpf_prog *prog, const struct bpf_ext_analyzer_ops *ops,
> diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
> index 4cf9b72c59a0..450f60e6229d 100644
> --- a/kernel/bpf/verifier.c
> +++ b/kernel/bpf/verifier.c
> @@ -153,27 +153,21 @@ struct bpf_call_arg_meta {
> int access_size;
> };
>
> -/* verbose verifier prints what it's seeing
> - * bpf_check() is called under lock, so no race to access these global vars
> - */
> -static u32 log_level, log_size, log_len;
> -static char *log_buf;
> -
> -static DEFINE_MUTEX(bpf_verifier_lock);
yep. looks great.
Please test it and submit officially :)
The commit aafe6ae9cee3 ("bpf: dynamically allocate digest scratch buffer")
fixed the other case where we were relying on the above mutex.
The only other spot to be adjusted is to add spin_lock/mutex or DO_ONCE() to
bpf_get_skb_set_tunnel_proto() to protect md_dst init.
imo that would be it.
Daniel, anything else comes to mind?
^ permalink raw reply
* [net-next:master 146/148] htmldocs: net/core/dev.c:1306: warning: No description found for parameter 'name'
From: kbuild test robot @ 2017-10-04 1:56 UTC (permalink / raw)
To: Florian Westphal; +Cc: kbuild-all, netdev
[-- Attachment #1: Type: text/plain, Size: 5928 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head: 26873308b21654b6e0785b9f9e2c5414d37a4c4c
commit: 6c5570016b972d9b1f0f6c2dca9cc0422b1f92bf [146/148] net: core: decouple ifalias get/set from rtnl lock
reproduce: make htmldocs
All warnings (new ones prefixed by >>):
WARNING: convert(1) not found, for SVG to PDF conversion install ImageMagick (https://www.imagemagick.org)
kernel/trace/blktrace.c:818: warning: No description found for parameter 'cgid'
include/linux/sync_file.h:51: warning: No description found for parameter 'flags'
drivers/gpio/gpiolib.c:593: warning: No description found for parameter '16'
drivers/gpio/gpiolib.c:593: warning: Excess struct/union/enum/typedef member 'events' description in 'lineevent_state'
include/linux/usb/gadget.h:232: warning: No description found for parameter 'claimed'
include/linux/usb/gadget.h:232: warning: No description found for parameter 'enabled'
include/linux/usb/gadget.h:414: warning: No description found for parameter 'quirk_altset_not_supp'
include/linux/usb/gadget.h:414: warning: No description found for parameter 'quirk_stall_not_supp'
include/linux/usb/gadget.h:414: warning: No description found for parameter 'quirk_zlp_not_supp'
fs/inode.c:1680: warning: No description found for parameter 'rcu'
include/linux/jbd2.h:443: warning: No description found for parameter 'i_transaction'
include/linux/jbd2.h:443: warning: No description found for parameter 'i_next_transaction'
include/linux/jbd2.h:443: warning: No description found for parameter 'i_list'
include/linux/jbd2.h:443: warning: No description found for parameter 'i_vfs_inode'
include/linux/jbd2.h:443: warning: No description found for parameter 'i_flags'
include/linux/jbd2.h:497: warning: No description found for parameter 'h_rsv_handle'
include/linux/jbd2.h:497: warning: No description found for parameter 'h_reserved'
include/linux/jbd2.h:497: warning: No description found for parameter 'h_type'
include/linux/jbd2.h:497: warning: No description found for parameter 'h_line_no'
include/linux/jbd2.h:497: warning: No description found for parameter 'h_start_jiffies'
include/linux/jbd2.h:497: warning: No description found for parameter 'h_requested_credits'
include/linux/jbd2.h:497: warning: No description found for parameter 'saved_alloc_context'
include/linux/jbd2.h:1050: warning: No description found for parameter 'j_chkpt_bhs'
include/linux/jbd2.h:1050: warning: No description found for parameter 'j_devname'
include/linux/jbd2.h:1050: warning: No description found for parameter 'j_average_commit_time'
include/linux/jbd2.h:1050: warning: No description found for parameter 'j_min_batch_time'
include/linux/jbd2.h:1050: warning: No description found for parameter 'j_max_batch_time'
include/linux/jbd2.h:1050: warning: No description found for parameter 'j_commit_callback'
include/linux/jbd2.h:1050: warning: No description found for parameter 'j_failed_commit'
include/linux/jbd2.h:1050: warning: No description found for parameter 'j_chksum_driver'
include/linux/jbd2.h:1050: warning: No description found for parameter 'j_csum_seed'
fs/jbd2/transaction.c:511: warning: No description found for parameter 'type'
fs/jbd2/transaction.c:511: warning: No description found for parameter 'line_no'
fs/jbd2/transaction.c:641: warning: No description found for parameter 'gfp_mask'
include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_pin'
include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_unpin'
include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_res_obj'
include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_get_sg_table'
include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_import_sg_table'
include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_vmap'
include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_vunmap'
include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_mmap'
include/drm/drm_mode_config.h:771: warning: No description found for parameter 'modifiers_property'
include/drm/drm_mode_config.h:771: warning: Excess struct/union/enum/typedef member 'modifiers' description in 'drm_mode_config'
include/drm/drm_plane.h:544: warning: No description found for parameter 'modifiers'
include/drm/drm_plane.h:544: warning: No description found for parameter 'modifier_count'
drivers/gpu/host1x/bus.c:50: warning: No description found for parameter 'driver'
>> net/core/dev.c:1306: warning: No description found for parameter 'name'
>> net/core/dev.c:1306: warning: Excess function parameter 'alias' description in 'dev_get_alias'
Documentation/core-api/kernel-api.rst:354: ERROR: Error in "kernel-doc" directive:
unknown option: "external".
vim +/name +1306 net/core/dev.c
1294
1295 /**
1296 * dev_get_alias - get ifalias of a device
1297 * @dev: device
1298 * @alias: buffer to store name of ifalias
1299 * @len: size of buffer
1300 *
1301 * get ifalias for a device. Caller must make sure dev cannot go
1302 * away, e.g. rcu read lock or own a reference count to device.
1303 */
1304 int dev_get_alias(const struct net_device *dev, char *name, size_t len)
1305 {
> 1306 const struct dev_ifalias *alias;
1307 int ret = 0;
1308
1309 rcu_read_lock();
1310 alias = rcu_dereference(dev->ifalias);
1311 if (alias)
1312 ret = snprintf(name, len, "%s", alias->ifalias);
1313 rcu_read_unlock();
1314
1315 return ret;
1316 }
1317
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 6761 bytes --]
^ permalink raw reply
* Re: [PATCH net] RDS: IB: Initialize max_items based on underlying device attributes
From: Santosh Shilimkar @ 2017-10-04 1:07 UTC (permalink / raw)
To: Avinash Repaka, linux-rdma; +Cc: David S. Miller, netdev, linux-kernel
In-Reply-To: <1507078237-32366-1-git-send-email-avinash.repaka@oracle.com>
Hi Avinash,
On 10/3/2017 5:50 PM, Avinash Repaka wrote:
> Use max_1m_mrs/max_8k_mrs while setting max_items, as the former
> variables are set based on the underlying device attricutes.
>
s/attricutes/attributes
> Signed-off-by: Avinash Repaka <avinash.repaka@oracle.com>
> ---
> net/rds/ib_rdma.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
This patch is fine but it will be nice if you can collect
these changes in series as you are trying to update the
FRWR support. Like this patch and other cleanup patch
you posted yesterday.
With that log fixed,
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
^ permalink raw reply
* [PATCH net] RDS: IB: Initialize max_items based on underlying device attributes
From: Avinash Repaka @ 2017-10-04 0:50 UTC (permalink / raw)
To: Santosh Shilimkar, David S. Miller, netdev, linux-rdma, rds-devel,
linux-kernel
Cc: Avinash Repaka
Use max_1m_mrs/max_8k_mrs while setting max_items, as the former
variables are set based on the underlying device attricutes.
Signed-off-by: Avinash Repaka <avinash.repaka@oracle.com>
---
net/rds/ib_rdma.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index 9a3c54e..e678699 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -601,11 +601,11 @@ struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_ibdev,
if (pool_type == RDS_IB_MR_1M_POOL) {
/* +1 allows for unaligned MRs */
pool->fmr_attr.max_pages = RDS_MR_1M_MSG_SIZE + 1;
- pool->max_items = RDS_MR_1M_POOL_SIZE;
+ pool->max_items = rds_ibdev->max_1m_mrs;
} else {
/* pool_type == RDS_IB_MR_8K_POOL */
pool->fmr_attr.max_pages = RDS_MR_8K_MSG_SIZE + 1;
- pool->max_items = RDS_MR_8K_POOL_SIZE;
+ pool->max_items = rds_ibdev->max_8k_mrs;
}
pool->max_free_pinned = pool->max_items * pool->fmr_attr.max_pages / 4;
--
2.4.11
^ permalink raw reply related
* Re: [PATCH net-next v2 0/3] tools: add bpftool
From: Jakub Kicinski @ 2017-10-04 0:48 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo; +Cc: netdev, daniel, alexei.starovoitov, oss-drivers
In-Reply-To: <20171003201942.GH25388@kernel.org>
On Tue, 3 Oct 2017 17:19:42 -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Oct 02, 2017 at 04:11:27PM -0700, Jakub Kicinski escreveu:
> > Hi!
> >
> > This set adds bpftool to the tools/ directory. The first
> > patch renames tools/net to tools/bpf, the second one adds
> > the new code, while the third adds simple documentation.
> >
> > v2:
> > - report names, map ids, load time, uid;
> > - add docs/man pages;
> > - general cleanups & fixes.
> >
> > Thanks to David Beckett for help with docs and testing.
>
> Why not call it just 'bpf'?
bpftool was suggested as a better name, I don't really mind either way.
^ permalink raw reply
* Re: [PATCH net] RDS: IB: Limit the scope of has_fr/has_fmr variables
From: Santosh Shilimkar @ 2017-10-04 0:42 UTC (permalink / raw)
To: David Miller
Cc: avinash.repaka-QHcLZuEGTsvQT0dZR+AlfA,
netdev-u79uwXL29TY76Z2rM5mHXA, linux-rdma-u79uwXL29TY76Z2rM5mHXA,
rds-devel-N0ozoZBvEnrZJqsBc5GL+g,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
In-Reply-To: <1172819f-1c28-7756-4874-aa89f50c0733-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
Hi Dave,
On 10/2/2017 1:30 PM, Santosh Shilimkar wrote:
> On 10/1/2017 10:56 PM, David Miller wrote:
>> From: David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
[...]
>>
>> Actually, reverted, this breaks the build.
>>
>> net/rds/rdma_transport.c:38:10: fatal error: ib.h: No such file or
>> directory
>> #include "ib.h"
>>
>> Although I can't see how in the world this patch is causing such
>> an error.
>>
> Weird indeed. Will sort this out with Avinash. Thanks Dave.
>
I tried few build combinations on net-next but couldn't
reproduce the build failure. AFAIU, the build error can only
happen if for some reason the ib.h file got deleted
accidentally. I did delete ib.h file and saw below error
CC [M] net/rds/rdma_transport.o
net/rds/rdma_transport.c:38:16: error: ib.h: No such file or directory
Could it be the case for some reason the ib.h file got
deleted or mangled while applying the $subject patch ?
Regards,
Santosh
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^ permalink raw reply
* [next-queue PATCH v4 3/4] net/sched: Introduce Credit Based Shaper (CBS) qdisc
From: Vinicius Costa Gomes @ 2017-10-04 0:28 UTC (permalink / raw)
To: netdev, intel-wired-lan
Cc: Vinicius Costa Gomes, jhs, xiyou.wangcong, jiri, andre.guedes,
ivan.briano, jesus.sanchez-palencia, boon.leong.ong,
richardcochran, henrik, levipearson, rodney.cummings
In-Reply-To: <20171004002831.18371-1-vinicius.gomes@intel.com>
This queueing discipline implements the shaper algorithm defined by
the 802.1Q-2014 Section 8.6.8.2 and detailed in Annex L.
It's primary usage is to apply some bandwidth reservation to user
defined traffic classes, which are mapped to different queues via the
mqprio qdisc.
Initially, it only supports offloading the traffic shaping work to
supporting controllers.
Later, when a software implementation is added, the current dependency
on being installed "under" mqprio can be lifted.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
---
include/linux/netdevice.h | 1 +
include/net/pkt_sched.h | 9 ++
include/uapi/linux/pkt_sched.h | 17 ++++
net/sched/Kconfig | 11 ++
net/sched/Makefile | 1 +
net/sched/sch_cbs.c | 225 +++++++++++++++++++++++++++++++++++++++++
6 files changed, 264 insertions(+)
create mode 100644 net/sched/sch_cbs.c
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index e1d6ef130611..b8798adc214f 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -775,6 +775,7 @@ enum tc_setup_type {
TC_SETUP_CLSFLOWER,
TC_SETUP_CLSMATCHALL,
TC_SETUP_CLSBPF,
+ TC_SETUP_CBS,
};
/* These structures hold the attributes of xdp state that are being passed
diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index 259bc191ba59..7c597b050b36 100644
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -146,4 +146,13 @@ static inline bool is_classid_clsact_egress(u32 classid)
TC_H_MIN(classid) == TC_H_MIN(TC_H_MIN_EGRESS);
}
+struct tc_cbs_qopt_offload {
+ u8 enable;
+ s32 queue;
+ s32 hicredit;
+ s32 locredit;
+ s32 idleslope;
+ s32 sendslope;
+};
+
#endif
diff --git a/include/uapi/linux/pkt_sched.h b/include/uapi/linux/pkt_sched.h
index 099bf5528fed..27c849c053cf 100644
--- a/include/uapi/linux/pkt_sched.h
+++ b/include/uapi/linux/pkt_sched.h
@@ -871,4 +871,21 @@ struct tc_pie_xstats {
__u32 maxq; /* maximum queue size */
__u32 ecn_mark; /* packets marked with ecn*/
};
+
+/* CBS */
+struct tc_cbs_qopt {
+ __s32 hicredit;
+ __s32 locredit;
+ __s32 idleslope;
+ __s32 sendslope;
+};
+
+enum {
+ TCA_CBS_UNSPEC,
+ TCA_CBS_PARMS,
+ __TCA_CBS_MAX,
+};
+
+#define TCA_CBS_MAX (__TCA_CBS_MAX - 1)
+
#endif
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index e70ed26485a2..c03d86a7775e 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -172,6 +172,17 @@ config NET_SCH_TBF
To compile this code as a module, choose M here: the
module will be called sch_tbf.
+config NET_SCH_CBS
+ tristate "Credit Based Shaper (CBS)"
+ ---help---
+ Say Y here if you want to use the Credit Based Shaper (CBS) packet
+ scheduling algorithm.
+
+ See the top of <file:net/sched/sch_cbs.c> for more details.
+
+ To compile this code as a module, choose M here: the
+ module will be called sch_cbs.
+
config NET_SCH_GRED
tristate "Generic Random Early Detection (GRED)"
---help---
diff --git a/net/sched/Makefile b/net/sched/Makefile
index 7b915d226de7..80c8f92d162d 100644
--- a/net/sched/Makefile
+++ b/net/sched/Makefile
@@ -52,6 +52,7 @@ obj-$(CONFIG_NET_SCH_FQ_CODEL) += sch_fq_codel.o
obj-$(CONFIG_NET_SCH_FQ) += sch_fq.o
obj-$(CONFIG_NET_SCH_HHF) += sch_hhf.o
obj-$(CONFIG_NET_SCH_PIE) += sch_pie.o
+obj-$(CONFIG_NET_SCH_CBS) += sch_cbs.o
obj-$(CONFIG_NET_CLS_U32) += cls_u32.o
obj-$(CONFIG_NET_CLS_ROUTE4) += cls_route.o
diff --git a/net/sched/sch_cbs.c b/net/sched/sch_cbs.c
new file mode 100644
index 000000000000..3e0fb0b92160
--- /dev/null
+++ b/net/sched/sch_cbs.c
@@ -0,0 +1,225 @@
+/*
+ * net/sched/sch_cbs.c Credit Based Shaper
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Vinicius Costa Gomes <vinicius.gomes@intel.com>
+ *
+ */
+
+/* Credit Based Shaper (CBS)
+ =========================
+
+ This is a simple rate-limiting shaper aimed at TSN applications on
+ systems with known traffic workloads.
+
+ Its algorithm is defined by the IEEE 802.1Q-2014 Specification,
+ Section 8.6.8.2, and explained in more detail in the Annex L of the
+ same specification.
+
+ There are four tunables to be considered:
+
+ 'idleslope': Idleslope is the rate of credits that is
+ accumulated (in kilobits per second) when there is at least
+ one packet waiting for transmission. Packets are transmitted
+ when the current value of credits is equal or greater than
+ zero. When there is no packet to be transmitted the amount of
+ credits is set to zero. This is the main tunable of the CBS
+ algorithm.
+
+ 'sendslope':
+ Sendslope is the rate of credits that is depleted (it should be a
+ negative number of kilobits per second) when a transmission is
+ ocurring. It can be calculated as follows, (IEEE 802.1Q-2014 Section
+ 8.6.8.2 item g):
+
+ sendslope = idleslope - port_transmit_rate
+
+ 'hicredit': Hicredit defines the maximum amount of credits (in
+ bytes) that can be accumulated. Hicredit depends on the
+ characteristics of interfering traffic,
+ 'max_interference_size' is the maximum size of any burst of
+ traffic that can delay the transmission of a frame that is
+ available for transmission for this traffic class, (IEEE
+ 802.1Q-2014 Annex L, Equation L-3):
+
+ hicredit = max_interference_size * (idleslope / port_transmit_rate)
+
+ 'locredit': Locredit is the minimum amount of credits that can
+ be reached. It is a function of the traffic flowing through
+ this qdisc (IEEE 802.1Q-2014 Annex L, Equation L-2):
+
+ locredit = max_frame_size * (sendslope / port_transmit_rate)
+*/
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+#include <net/netlink.h>
+#include <net/sch_generic.h>
+#include <net/pkt_sched.h>
+
+struct cbs_sched_data {
+ s32 queue;
+ s32 locredit;
+ s32 hicredit;
+ s32 sendslope;
+ s32 idleslope;
+};
+
+static int cbs_enqueue(struct sk_buff *skb, struct Qdisc *sch,
+ struct sk_buff **to_free)
+{
+ return qdisc_enqueue_tail(skb, sch);
+}
+
+static const struct nla_policy cbs_policy[TCA_CBS_MAX + 1] = {
+ [TCA_CBS_PARMS] = { .len = sizeof(struct tc_cbs_qopt) },
+};
+
+static int cbs_change(struct Qdisc *sch, struct nlattr *opt)
+{
+ struct cbs_sched_data *q = qdisc_priv(sch);
+ struct tc_cbs_qopt_offload cbs = { };
+ struct nlattr *tb[TCA_CBS_MAX + 1];
+ const struct net_device_ops *ops;
+ struct tc_cbs_qopt *qopt;
+ struct net_device *dev;
+ int err;
+
+ err = nla_parse_nested(tb, TCA_CBS_MAX, opt, cbs_policy, NULL);
+ if (err < 0)
+ return err;
+
+ err = -EINVAL;
+ if (!tb[TCA_CBS_PARMS])
+ goto done;
+
+ qopt = nla_data(tb[TCA_CBS_PARMS]);
+
+ dev = qdisc_dev(sch);
+ ops = dev->netdev_ops;
+
+ cbs.queue = q->queue;
+ cbs.enable = 1;
+ cbs.hicredit = qopt->hicredit;
+ cbs.locredit = qopt->locredit;
+ cbs.idleslope = qopt->idleslope;
+ cbs.sendslope = qopt->sendslope;
+
+ err = -EOPNOTSUPP;
+ if (!ops->ndo_setup_tc)
+ goto done;
+
+ err = ops->ndo_setup_tc(dev, TC_SETUP_CBS, &cbs);
+ if (err < 0)
+ goto done;
+
+ q->hicredit = cbs.hicredit;
+ q->locredit = cbs.locredit;
+ q->idleslope = cbs.idleslope;
+ q->sendslope = cbs.sendslope;
+
+done:
+ return err;
+}
+
+static int cbs_init(struct Qdisc *sch, struct nlattr *opt)
+{
+ struct cbs_sched_data *q = qdisc_priv(sch);
+ struct net_device *dev = qdisc_dev(sch);
+
+ if (!opt)
+ return -EINVAL;
+
+ q->queue = sch->dev_queue - netdev_get_tx_queue(dev, 0);
+
+ return cbs_change(sch, opt);
+}
+
+static void cbs_destroy(struct Qdisc *sch)
+{
+ struct cbs_sched_data *q = qdisc_priv(sch);
+ struct tc_cbs_qopt_offload cbs = { };
+ const struct net_device_ops *ops;
+ struct net_device *dev;
+ int err;
+
+ q->hicredit = 0;
+ q->locredit = 0;
+ q->idleslope = 0;
+ q->sendslope = 0;
+
+ dev = qdisc_dev(sch);
+ ops = dev->netdev_ops;
+
+ if (!ops->ndo_setup_tc)
+ return;
+
+ cbs.queue = q->queue;
+ cbs.enable = 0;
+
+ err = ops->ndo_setup_tc(dev, TC_SETUP_CBS, &cbs);
+ if (err < 0)
+ pr_warn("Couldn't reset queue %d to default values\n",
+ cbs.queue);
+}
+
+static int cbs_dump(struct Qdisc *sch, struct sk_buff *skb)
+{
+ struct cbs_sched_data *q = qdisc_priv(sch);
+ struct nlattr *nest;
+ struct tc_cbs_qopt opt;
+
+ nest = nla_nest_start(skb, TCA_OPTIONS);
+ if (!nest)
+ goto nla_put_failure;
+
+ opt.hicredit = q->hicredit;
+ opt.locredit = q->locredit;
+ opt.sendslope = q->sendslope;
+ opt.idleslope = q->idleslope;
+
+ if (nla_put(skb, TCA_CBS_PARMS, sizeof(opt), &opt))
+ goto nla_put_failure;
+
+ return nla_nest_end(skb, nest);
+
+nla_put_failure:
+ nla_nest_cancel(skb, nest);
+ return -1;
+}
+
+static struct Qdisc_ops cbs_qdisc_ops __read_mostly = {
+ .next = NULL,
+ .id = "cbs",
+ .priv_size = sizeof(struct cbs_sched_data),
+ .enqueue = cbs_enqueue,
+ .dequeue = qdisc_dequeue_head,
+ .peek = qdisc_peek_dequeued,
+ .init = cbs_init,
+ .reset = qdisc_reset_queue,
+ .destroy = cbs_destroy,
+ .change = cbs_change,
+ .dump = cbs_dump,
+ .owner = THIS_MODULE,
+};
+
+static int __init cbs_module_init(void)
+{
+ return register_qdisc(&cbs_qdisc_ops);
+}
+
+static void __exit cbs_module_exit(void)
+{
+ unregister_qdisc(&cbs_qdisc_ops);
+}
+module_init(cbs_module_init)
+module_exit(cbs_module_exit)
+MODULE_LICENSE("GPL");
--
2.14.2
^ permalink raw reply related
* [next-queue PATCH v4 4/4] igb: Add support for CBS offload
From: Vinicius Costa Gomes @ 2017-10-04 0:28 UTC (permalink / raw)
To: netdev, intel-wired-lan
Cc: Andre Guedes, jhs, xiyou.wangcong, jiri, ivan.briano,
jesus.sanchez-palencia, boon.leong.ong, richardcochran, henrik,
levipearson, rodney.cummings
In-Reply-To: <20171004002831.18371-1-vinicius.gomes@intel.com>
From: Andre Guedes <andre.guedes@intel.com>
This patch adds support for Credit-Based Shaper (CBS) qdisc offload
from Traffic Control system. This support enable us to leverage the
Forwarding and Queuing for Time-Sensitive Streams (FQTSS) features
from Intel i210 Ethernet Controller. FQTSS is the former 802.1Qav
standard which was merged into 802.1Q in 2014. It enables traffic
prioritization and bandwidth reservation via the Credit-Based Shaper
which is implemented in hardware by i210 controller.
The patch introduces the igb_setup_tc() function which implements the
support for CBS qdisc hardware offload in the IGB driver. CBS offload
is the only traffic control offload supported by the driver at the
moment.
FQTSS transmission mode from i210 controller is automatically enabled
by the IGB driver when the CBS is enabled for the first hardware
queue. Likewise, FQTSS mode is automatically disabled when CBS is
disabled for the last hardware queue. Changing FQTSS mode requires NIC
reset.
FQTSS feature is supported by i210 controller only.
Signed-off-by: Andre Guedes <andre.guedes@intel.com>
---
drivers/net/ethernet/intel/igb/e1000_defines.h | 23 ++
drivers/net/ethernet/intel/igb/e1000_regs.h | 8 +
drivers/net/ethernet/intel/igb/igb.h | 6 +
drivers/net/ethernet/intel/igb/igb_main.c | 347 +++++++++++++++++++++++++
4 files changed, 384 insertions(+)
diff --git a/drivers/net/ethernet/intel/igb/e1000_defines.h b/drivers/net/ethernet/intel/igb/e1000_defines.h
index 1de82f247312..83cabff1e0ab 100644
--- a/drivers/net/ethernet/intel/igb/e1000_defines.h
+++ b/drivers/net/ethernet/intel/igb/e1000_defines.h
@@ -353,7 +353,18 @@
#define E1000_RXPBS_CFG_TS_EN 0x80000000
#define I210_RXPBSIZE_DEFAULT 0x000000A2 /* RXPBSIZE default */
+#define I210_RXPBSIZE_MASK 0x0000003F
+#define I210_RXPBSIZE_PB_32KB 0x00000020
#define I210_TXPBSIZE_DEFAULT 0x04000014 /* TXPBSIZE default */
+#define I210_TXPBSIZE_MASK 0xC0FFFFFF
+#define I210_TXPBSIZE_PB0_8KB (8 << 0)
+#define I210_TXPBSIZE_PB1_8KB (8 << 6)
+#define I210_TXPBSIZE_PB2_4KB (4 << 12)
+#define I210_TXPBSIZE_PB3_4KB (4 << 18)
+
+#define I210_DTXMXPKTSZ_DEFAULT 0x00000098
+
+#define I210_SR_QUEUES_NUM 2
/* SerDes Control */
#define E1000_SCTL_DISABLE_SERDES_LOOPBACK 0x0400
@@ -1051,4 +1062,16 @@
#define E1000_VLAPQF_P_VALID(_n) (0x1 << (3 + (_n) * 4))
#define E1000_VLAPQF_QUEUE_MASK 0x03
+/* TX Qav Control fields */
+#define E1000_TQAVCTRL_XMIT_MODE BIT(0)
+#define E1000_TQAVCTRL_DATAFETCHARB BIT(4)
+#define E1000_TQAVCTRL_DATATRANARB BIT(8)
+
+/* TX Qav Credit Control fields */
+#define E1000_TQAVCC_IDLESLOPE_MASK 0xFFFF
+#define E1000_TQAVCC_QUEUEMODE BIT(31)
+
+/* Transmit Descriptor Control fields */
+#define E1000_TXDCTL_PRIORITY BIT(27)
+
#endif
diff --git a/drivers/net/ethernet/intel/igb/e1000_regs.h b/drivers/net/ethernet/intel/igb/e1000_regs.h
index 58adbf234e07..8eee081d395f 100644
--- a/drivers/net/ethernet/intel/igb/e1000_regs.h
+++ b/drivers/net/ethernet/intel/igb/e1000_regs.h
@@ -421,6 +421,14 @@ do { \
#define E1000_I210_FLA 0x1201C
+#define E1000_I210_DTXMXPKTSZ 0x355C
+
+#define E1000_I210_TXDCTL(_n) (0x0E028 + ((_n) * 0x40))
+
+#define E1000_I210_TQAVCTRL 0x3570
+#define E1000_I210_TQAVCC(_n) (0x3004 + ((_n) * 0x40))
+#define E1000_I210_TQAVHC(_n) (0x300C + ((_n) * 0x40))
+
#define E1000_INVM_DATA_REG(_n) (0x12120 + 4*(_n))
#define E1000_INVM_SIZE 64 /* Number of INVM Data Registers */
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 06ffb2bc713e..92845692087a 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -281,6 +281,11 @@ struct igb_ring {
u16 count; /* number of desc. in the ring */
u8 queue_index; /* logical index of the ring*/
u8 reg_idx; /* physical index of the ring */
+ bool cbs_enable; /* indicates if CBS is enabled */
+ s32 idleslope; /* idleSlope in kbps */
+ s32 sendslope; /* sendSlope in kbps */
+ s32 hicredit; /* hiCredit in bytes */
+ s32 locredit; /* loCredit in bytes */
/* everything past this point are written often */
u16 next_to_clean;
@@ -621,6 +626,7 @@ struct igb_adapter {
#define IGB_FLAG_EEE BIT(14)
#define IGB_FLAG_VLAN_PROMISC BIT(15)
#define IGB_FLAG_RX_LEGACY BIT(16)
+#define IGB_FLAG_FQTSS BIT(17)
/* Media Auto Sense */
#define IGB_MAS_ENABLE_0 0X0001
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index fd4a46b03cc8..03b8d0f4acfd 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -34,6 +34,7 @@
#include <linux/slab.h>
#include <net/checksum.h>
#include <net/ip6_checksum.h>
+#include <net/pkt_sched.h>
#include <linux/net_tstamp.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
@@ -62,6 +63,17 @@
#define BUILD 0
#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
__stringify(BUILD) "-k"
+
+enum queue_mode {
+ QUEUE_MODE_STRICT_PRIORITY,
+ QUEUE_MODE_STREAM_RESERVATION,
+};
+
+enum tx_queue_prio {
+ TX_QUEUE_PRIO_HIGH,
+ TX_QUEUE_PRIO_LOW,
+};
+
char igb_driver_name[] = "igb";
char igb_driver_version[] = DRV_VERSION;
static const char igb_driver_string[] =
@@ -1271,6 +1283,12 @@ static int igb_alloc_q_vector(struct igb_adapter *adapter,
ring->count = adapter->tx_ring_count;
ring->queue_index = txr_idx;
+ ring->cbs_enable = false;
+ ring->idleslope = 0;
+ ring->sendslope = 0;
+ ring->hicredit = 0;
+ ring->locredit = 0;
+
u64_stats_init(&ring->tx_syncp);
u64_stats_init(&ring->tx_syncp2);
@@ -1598,6 +1616,284 @@ static void igb_get_hw_control(struct igb_adapter *adapter)
ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
}
+static void enable_fqtss(struct igb_adapter *adapter, bool enable)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct e1000_hw *hw = &adapter->hw;
+
+ WARN_ON(hw->mac.type != e1000_i210);
+
+ if (enable)
+ adapter->flags |= IGB_FLAG_FQTSS;
+ else
+ adapter->flags &= ~IGB_FLAG_FQTSS;
+
+ if (netif_running(netdev))
+ schedule_work(&adapter->reset_task);
+}
+
+static bool is_fqtss_enabled(struct igb_adapter *adapter)
+{
+ return (adapter->flags & IGB_FLAG_FQTSS) ? true : false;
+}
+
+static void set_tx_desc_fetch_prio(struct e1000_hw *hw, int queue,
+ enum tx_queue_prio prio)
+{
+ u32 val;
+
+ WARN_ON(hw->mac.type != e1000_i210);
+ WARN_ON(queue < 0 || queue > 4);
+
+ val = rd32(E1000_I210_TXDCTL(queue));
+
+ if (prio == TX_QUEUE_PRIO_HIGH)
+ val |= E1000_TXDCTL_PRIORITY;
+ else
+ val &= ~E1000_TXDCTL_PRIORITY;
+
+ wr32(E1000_I210_TXDCTL(queue), val);
+}
+
+static void set_queue_mode(struct e1000_hw *hw, int queue, enum queue_mode mode)
+{
+ u32 val;
+
+ WARN_ON(hw->mac.type != e1000_i210);
+ WARN_ON(queue < 0 || queue > 1);
+
+ val = rd32(E1000_I210_TQAVCC(queue));
+
+ if (mode == QUEUE_MODE_STREAM_RESERVATION)
+ val |= E1000_TQAVCC_QUEUEMODE;
+ else
+ val &= ~E1000_TQAVCC_QUEUEMODE;
+
+ wr32(E1000_I210_TQAVCC(queue), val);
+}
+
+/**
+ * igb_configure_cbs - Configure Credit-Based Shaper (CBS)
+ * @adapter: pointer to adapter struct
+ * @queue: queue number
+ * @enable: true = enable CBS, false = disable CBS
+ * @idleslope: idleSlope in kbps
+ * @sendslope: sendSlope in kbps
+ * @hicredit: hiCredit in bytes
+ * @locredit: loCredit in bytes
+ *
+ * Configure CBS for a given hardware queue. When disabling, idleslope,
+ * sendslope, hicredit, locredit arguments are ignored. Returns 0 if
+ * success. Negative otherwise.
+ **/
+static void igb_configure_cbs(struct igb_adapter *adapter, int queue,
+ bool enable, int idleslope, int sendslope,
+ int hicredit, int locredit)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct e1000_hw *hw = &adapter->hw;
+ u32 tqavcc;
+ u16 value;
+
+ WARN_ON(hw->mac.type != e1000_i210);
+ WARN_ON(queue < 0 || queue > 1);
+
+ if (enable) {
+ set_tx_desc_fetch_prio(hw, queue, TX_QUEUE_PRIO_HIGH);
+ set_queue_mode(hw, queue, QUEUE_MODE_STREAM_RESERVATION);
+
+ /* According to i210 datasheet section 7.2.7.7, we should set
+ * the 'idleSlope' field from TQAVCC register following the
+ * equation:
+ *
+ * For 100 Mbps link speed:
+ *
+ * value = BW * 0x7735 * 0.2 (E1)
+ *
+ * For 1000Mbps link speed:
+ *
+ * value = BW * 0x7735 * 2 (E2)
+ *
+ * E1 and E2 can be merged into one equation as shown below.
+ * Note that 'link-speed' is in Mbps.
+ *
+ * value = BW * 0x7735 * 2 * link-speed
+ * -------------- (E3)
+ * 1000
+ *
+ * 'BW' is the percentage bandwidth out of full link speed
+ * which can be found with the following equation. Note that
+ * idleSlope here is the parameter from this function which
+ * is in kbps.
+ *
+ * BW = idleSlope
+ * ----------------- (E4)
+ * link-speed * 1000
+ *
+ * That said, we can come up with a generic equation to
+ * calculate the value we should set it TQAVCC register by
+ * replacing 'BW' in E3 by E4. The resulting equation is:
+ *
+ * value = idleSlope * 0x7735 * 2 * link-speed
+ * ----------------- -------------- (E5)
+ * link-speed * 1000 1000
+ *
+ * 'link-speed' is present in both sides of the fraction so
+ * it is canceled out. The final equation is the following:
+ *
+ * value = idleSlope * 61034
+ * ----------------- (E6)
+ * 1000000
+ */
+ value = DIV_ROUND_UP_ULL(idleslope * 61034ULL, 1000000);
+
+ tqavcc = rd32(E1000_I210_TQAVCC(queue));
+ tqavcc &= ~E1000_TQAVCC_IDLESLOPE_MASK;
+ tqavcc |= value;
+ wr32(E1000_I210_TQAVCC(queue), tqavcc);
+
+ wr32(E1000_I210_TQAVHC(queue), 0x80000000 + hicredit * 0x7735);
+ } else {
+ set_tx_desc_fetch_prio(hw, queue, TX_QUEUE_PRIO_LOW);
+ set_queue_mode(hw, queue, QUEUE_MODE_STRICT_PRIORITY);
+
+ /* Set idleSlope to zero. */
+ tqavcc = rd32(E1000_I210_TQAVCC(queue));
+ tqavcc &= ~E1000_TQAVCC_IDLESLOPE_MASK;
+ wr32(E1000_I210_TQAVCC(queue), tqavcc);
+
+ /* Set hiCredit to zero. */
+ wr32(E1000_I210_TQAVHC(queue), 0);
+ }
+
+ /* XXX: In i210 controller the sendSlope and loCredit parameters from
+ * CBS are not configurable by software so we don't do any 'controller
+ * configuration' in respect to these parameters.
+ */
+
+ netdev_dbg(netdev, "CBS %s: queue %d idleslope %d sendslope %d hiCredit %d locredit %d\n",
+ (enable) ? "enabled" : "disabled", queue,
+ idleslope, sendslope, hicredit, locredit);
+}
+
+static int igb_save_cbs_params(struct igb_adapter *adapter, int queue,
+ bool enable, int idleslope, int sendslope,
+ int hicredit, int locredit)
+{
+ struct igb_ring *ring;
+
+ if (queue < 0 || queue > adapter->num_tx_queues)
+ return -EINVAL;
+
+ ring = adapter->tx_ring[queue];
+
+ ring->cbs_enable = enable;
+ ring->idleslope = idleslope;
+ ring->sendslope = sendslope;
+ ring->hicredit = hicredit;
+ ring->locredit = locredit;
+
+ return 0;
+}
+
+static bool is_any_cbs_enabled(struct igb_adapter *adapter)
+{
+ struct igb_ring *ring;
+ int i;
+
+ for (i = 0; i < adapter->num_tx_queues; i++) {
+ ring = adapter->tx_ring[i];
+
+ if (ring->cbs_enable)
+ return true;
+ }
+
+ return false;
+}
+
+static void igb_setup_tx_mode(struct igb_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct e1000_hw *hw = &adapter->hw;
+ u32 val;
+
+ /* Only i210 controller supports changing the transmission mode. */
+ if (hw->mac.type != e1000_i210)
+ return;
+
+ if (is_fqtss_enabled(adapter)) {
+ int i, max_queue;
+
+ /* Configure TQAVCTRL register: set transmit mode to 'Qav',
+ * set data fetch arbitration to 'round robin' and set data
+ * transfer arbitration to 'credit shaper algorithm.
+ */
+ val = rd32(E1000_I210_TQAVCTRL);
+ val |= E1000_TQAVCTRL_XMIT_MODE | E1000_TQAVCTRL_DATATRANARB;
+ val &= ~E1000_TQAVCTRL_DATAFETCHARB;
+ wr32(E1000_I210_TQAVCTRL, val);
+
+ /* Configure Tx and Rx packet buffers sizes as described in
+ * i210 datasheet section 7.2.7.7.
+ */
+ val = rd32(E1000_TXPBS);
+ val &= ~I210_TXPBSIZE_MASK;
+ val |= I210_TXPBSIZE_PB0_8KB | I210_TXPBSIZE_PB1_8KB |
+ I210_TXPBSIZE_PB2_4KB | I210_TXPBSIZE_PB3_4KB;
+ wr32(E1000_TXPBS, val);
+
+ val = rd32(E1000_RXPBS);
+ val &= ~I210_RXPBSIZE_MASK;
+ val |= I210_RXPBSIZE_PB_32KB;
+ wr32(E1000_RXPBS, val);
+
+ /* Section 8.12.9 states that MAX_TPKT_SIZE from DTXMXPKTSZ
+ * register should not exceed the buffer size programmed in
+ * TXPBS. The smallest buffer size programmed in TXPBS is 4kB
+ * so according to the datasheet we should set MAX_TPKT_SIZE to
+ * 4kB / 64.
+ *
+ * However, when we do so, no frame from queue 2 and 3 are
+ * transmitted. It seems the MAX_TPKT_SIZE should not be great
+ * or _equal_ to the buffer size programmed in TXPBS. For this
+ * reason, we set set MAX_ TPKT_SIZE to (4kB - 1) / 64.
+ */
+ val = (4096 - 1) / 64;
+ wr32(E1000_I210_DTXMXPKTSZ, val);
+
+ /* Since FQTSS mode is enabled, apply any CBS configuration
+ * previously set. If no previous CBS configuration has been
+ * done, then the initial configuration is applied, which means
+ * CBS is disabled.
+ */
+ max_queue = (adapter->num_tx_queues < I210_SR_QUEUES_NUM) ?
+ adapter->num_tx_queues : I210_SR_QUEUES_NUM;
+
+ for (i = 0; i < max_queue; i++) {
+ struct igb_ring *ring = adapter->tx_ring[i];
+
+ igb_configure_cbs(adapter, i, ring->cbs_enable,
+ ring->idleslope, ring->sendslope,
+ ring->hicredit, ring->locredit);
+ }
+ } else {
+ wr32(E1000_RXPBS, I210_RXPBSIZE_DEFAULT);
+ wr32(E1000_TXPBS, I210_TXPBSIZE_DEFAULT);
+ wr32(E1000_I210_DTXMXPKTSZ, I210_DTXMXPKTSZ_DEFAULT);
+
+ val = rd32(E1000_I210_TQAVCTRL);
+ /* According to Section 8.12.21, the other flags we've set when
+ * enabling FQTSS are not relevant when disabling FQTSS so we
+ * don't set they here.
+ */
+ val &= ~E1000_TQAVCTRL_XMIT_MODE;
+ wr32(E1000_I210_TQAVCTRL, val);
+ }
+
+ netdev_dbg(netdev, "FQTSS %s\n", (is_fqtss_enabled(adapter)) ?
+ "enabled" : "disabled");
+}
+
/**
* igb_configure - configure the hardware for RX and TX
* @adapter: private board structure
@@ -1609,6 +1905,7 @@ static void igb_configure(struct igb_adapter *adapter)
igb_get_hw_control(adapter);
igb_set_rx_mode(netdev);
+ igb_setup_tx_mode(adapter);
igb_restore_vlan(adapter);
@@ -2150,6 +2447,55 @@ igb_features_check(struct sk_buff *skb, struct net_device *dev,
return features;
}
+static int igb_offload_cbs(struct igb_adapter *adapter,
+ struct tc_cbs_qopt_offload *qopt)
+{
+ struct e1000_hw *hw = &adapter->hw;
+ int err;
+
+ /* CBS offloading is only supported by i210 controller. */
+ if (hw->mac.type != e1000_i210)
+ return -EOPNOTSUPP;
+
+ /* CBS offloading is only supported by queue 0 and queue 1. */
+ if (qopt->queue < 0 || qopt->queue > 1)
+ return -EINVAL;
+
+ err = igb_save_cbs_params(adapter, qopt->queue, qopt->enable,
+ qopt->idleslope, qopt->sendslope,
+ qopt->hicredit, qopt->locredit);
+ if (err)
+ return err;
+
+ if (is_fqtss_enabled(adapter)) {
+ igb_configure_cbs(adapter, qopt->queue, qopt->enable,
+ qopt->idleslope, qopt->sendslope,
+ qopt->hicredit, qopt->locredit);
+
+ if (!is_any_cbs_enabled(adapter))
+ enable_fqtss(adapter, false);
+
+ } else {
+ enable_fqtss(adapter, true);
+ }
+
+ return 0;
+}
+
+static int igb_setup_tc(struct net_device *dev, enum tc_setup_type type,
+ void *type_data)
+{
+ struct igb_adapter *adapter = netdev_priv(dev);
+
+ switch (type) {
+ case TC_SETUP_CBS:
+ return igb_offload_cbs(adapter, type_data);
+
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
static const struct net_device_ops igb_netdev_ops = {
.ndo_open = igb_open,
.ndo_stop = igb_close,
@@ -2175,6 +2521,7 @@ static const struct net_device_ops igb_netdev_ops = {
.ndo_set_features = igb_set_features,
.ndo_fdb_add = igb_ndo_fdb_add,
.ndo_features_check = igb_features_check,
+ .ndo_setup_tc = igb_setup_tc,
};
/**
--
2.14.2
^ permalink raw reply related
* [next-queue PATCH v4 2/4] net/sched: Fix accessing invalid dev_queue
From: Vinicius Costa Gomes @ 2017-10-04 0:28 UTC (permalink / raw)
To: netdev, intel-wired-lan
Cc: Jesus Sanchez-Palencia, jhs, xiyou.wangcong, jiri, andre.guedes,
ivan.briano, boon.leong.ong, richardcochran, henrik, levipearson,
rodney.cummings
In-Reply-To: <20171004002831.18371-1-vinicius.gomes@intel.com>
From: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
In qdisc_alloc() the dev_queue pointer was used without any checks being
performed. If qdisc_create() gets a null dev_queue pointer, it just
passes it along to qdisc_alloc(), leading to a crash. That happens if a
root qdisc implements select_queue() and returns a null dev_queue
pointer for an "invalid handle", for example.
One way to reproduce that is:
1) Setup mqprio
$ tc qdisc replace dev enp3s0 parent root mqprio num_tc 3 \
map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 0
2) Replace the first inner qdisc
$ tc qdisc replace dev enp3s0 parent 8001:1 pfifo_fast
This will lead to the following crash:
[15274.874506] BUG: unable to handle kernel NULL pointer dereference at 0000000000000058
[15274.875044] IP: qdisc_alloc+0xd/0xf0
[15274.875253] PGD 1a37d067 P4D 1a37d067 PUD 1a0cb067 PMD 0
[15274.875566] Oops: 0000 [#1] SMP
[15274.875813] Modules linked in:
[15274.875993] CPU: 0 PID: 2006 Comm: tc Not tainted 4.14.0-rc1+ #42
[15274.876415] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-20170228_101828-anatol 04/01/2014
[15274.877019] task: ffff88001eb91d00 task.stack: ffffc90000734000
[15274.877359] RIP: 0010:qdisc_alloc+0xd/0xf0
[15274.877606] RSP: 0018:ffffc90000737a88 EFLAGS: 00010286
[15274.877904] RAX: ffffffff81ef0da0 RBX: 0000000000000000 RCX: 0000000000000000
[15274.878331] RDX: ffff88001a046830 RSI: ffffffff81ef0da0 RDI: 0000000000000000
[15274.878757] RBP: 0000000001000001 R08: 000000000000006c R09: ffffc90000737b40
[15274.879165] R10: fffffffffffffc20 R11: 0000000000000000 R12: ffff88001e308000
[15274.879571] R13: 0000000000000088 R14: ffffc90000737b40 R15: 0000000000000000
[15274.879978] FS: 00007f790a90a700(0000) GS:ffff88001fc00000(0000) knlGS:0000000000000000
[15274.880457] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[15274.880784] CR2: 0000000000000058 CR3: 000000001a003004 CR4: 00000000003606f0
[15274.881203] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[15274.881620] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[15274.882026] Call Trace:
[15274.882179] qdisc_create+0xb0/0x380
[15274.882388] ? security_capable+0x2e/0x50
[15274.882616] ? nla_parse+0x32/0x100
[15274.882818] tc_modify_qdisc+0x47f/0x560
[15274.883046] rtnetlink_rcv_msg+0x1db/0x200
[15274.883284] ? __skb_try_recv_datagram+0xd6/0x150
[15274.883555] ? rtnl_calcit.isra.21+0xe0/0xe0
[15274.883814] netlink_rcv_skb+0x92/0xf0
[15274.884031] netlink_unicast+0x12c/0x1d0
[15274.884258] netlink_sendmsg+0x2ee/0x330
[15274.884486] sock_sendmsg+0x28/0x40
[15274.884689] ___sys_sendmsg+0x25d/0x280
[15274.884913] ? __alloc_pages_nodemask+0x120/0x180
[15274.885185] ? page_add_new_anon_rmap+0x90/0xb0
[15274.885448] ? __handle_mm_fault+0x74e/0xc40
[15274.885695] ? __sys_sendmsg+0x3e/0x70
[15274.885912] __sys_sendmsg+0x3e/0x70
[15274.886123] entry_SYSCALL_64_fastpath+0x13/0x94
[15274.886387] RIP: 0033:0x7f7909b1a1b7
[15274.886594] RSP: 002b:00007ffe14315028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[15274.887042] RAX: ffffffffffffffda RBX: 0000000000661860 RCX: 00007f7909b1a1b7
[15274.887450] RDX: 0000000000000000 RSI: 00007ffe143150a0 RDI: 0000000000000003
[15274.887854] RBP: 00007ffe143150a0 R08: 0000000000000001 R09: 0000000000000000
[15274.888256] R10: 00000000000005f1 R11: 0000000000000246 R12: 00007ffe143150e0
[15274.888660] R13: 000000000066e620 R14: 00007ffe1431d180 R15: 0000000000000000
[15274.889070] Code: a8 01 74 09 48 89 df 5b e9 71 ff ff ff 5b c3 f3 c3 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 41 55 41 54 55 53 48 89 fb 44 8b 6e 20 <8b> 57 58 48 89 f5 4c 8b 27 be c0 80 40 01 41 8d bd 40 01 00 00
[15274.890154] RIP: qdisc_alloc+0xd/0xf0 RSP: ffffc90000737a88
[15274.890479] CR2: 0000000000000058
[15274.890677] ---[ end trace 6d0e946c11e46095 ]---
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
---
net/sched/sch_generic.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index a0a198768aad..de2408f1ccd3 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -603,8 +603,14 @@ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
struct Qdisc *sch;
unsigned int size = QDISC_ALIGN(sizeof(*sch)) + ops->priv_size;
int err = -ENOBUFS;
- struct net_device *dev = dev_queue->dev;
+ struct net_device *dev;
+
+ if (!dev_queue) {
+ err = -EINVAL;
+ goto errout;
+ }
+ dev = dev_queue->dev;
p = kzalloc_node(size, GFP_KERNEL,
netdev_queue_numa_node_read(dev_queue));
--
2.14.2
^ permalink raw reply related
* [next-queue PATCH v4 1/4] mqprio: Implement select_queue class_ops
From: Vinicius Costa Gomes @ 2017-10-04 0:28 UTC (permalink / raw)
To: netdev, intel-wired-lan
Cc: Jesus Sanchez-Palencia, jhs, xiyou.wangcong, jiri, andre.guedes,
ivan.briano, boon.leong.ong, richardcochran, henrik, levipearson,
rodney.cummings
In-Reply-To: <20171004002831.18371-1-vinicius.gomes@intel.com>
From: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
When replacing a child qdisc from mqprio, tc_modify_qdisc() must fetch
the netdev_queue pointer that the current child qdisc is associated
with before creating the new qdisc.
Currently, when using mqprio as root qdisc, the kernel will end up
getting the queue #0 pointer from the mqprio (root qdisc), which leaves
any new child qdisc with a possibly wrong netdev_queue pointer.
Implementing the Qdisc_class_ops select_queue() on mqprio fixes this
issue and avoid an inconsistent state when child qdiscs are replaced.
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
---
net/sched/sch_mqprio.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c
index 6bcdfe6e7b63..9d762ca4a76c 100644
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -396,6 +396,12 @@ static void mqprio_walk(struct Qdisc *sch, struct qdisc_walker *arg)
}
}
+static struct netdev_queue *mqprio_select_queue(struct Qdisc *sch,
+ struct tcmsg *tcm)
+{
+ return mqprio_queue_get(sch, TC_H_MIN(tcm->tcm_parent));
+}
+
static const struct Qdisc_class_ops mqprio_class_ops = {
.graft = mqprio_graft,
.leaf = mqprio_leaf,
@@ -403,6 +409,7 @@ static const struct Qdisc_class_ops mqprio_class_ops = {
.walk = mqprio_walk,
.dump = mqprio_dump_class,
.dump_stats = mqprio_dump_class_stats,
+ .select_queue = mqprio_select_queue,
};
static struct Qdisc_ops mqprio_qdisc_ops __read_mostly = {
--
2.14.2
^ permalink raw reply related
* [next-queue PATCH v4 0/4] TSN: Add qdisc based config interface for CBS
From: Vinicius Costa Gomes @ 2017-10-04 0:28 UTC (permalink / raw)
To: netdev, intel-wired-lan
Cc: Vinicius Costa Gomes, jhs, xiyou.wangcong, jiri, andre.guedes,
ivan.briano, jesus.sanchez-palencia, boon.leong.ong,
richardcochran, henrik, levipearson, rodney.cummings
Hi,
Changes since v3:
- None, only a clean patchset without old patches;
Changes since v2:
- squashed the patch introducing the userspace API into the patch
implementing CBS;
Changes since v1:
- Solved the mqprio dependency;
- Fixed a mqprio bug, that caused the inner qdisc to have a wrong
dev_queue associated with it;
Changes from the RFC:
- Fixed comments from Henrik Austad;
- Simplified the Qdisc, using the generic implementation of callbacks
where possible;
- Small refactor on the driver (igb) code;
This patchset is a proposal of how the Traffic Control subsystem can
be used to offload the configuration of the Credit Based Shaper
(defined in the IEEE 802.1Q-2014 Section 8.6.8.2) into supported
network devices.
As part of this work, we've assessed previous public discussions
related to TSN enabling: patches from Henrik Austad (Cisco), the
presentation from Eric Mann at Linux Plumbers 2012, patches from
Gangfeng Huang (National Instruments) and the current state of the
OpenAVNU project (https://github.com/AVnu/OpenAvnu/).
Overview
========
Time-sensitive Networking (TSN) is a set of standards that aim to
address resources availability for providing bandwidth reservation and
bounded latency on Ethernet based LANs. The proposal described here
aims to cover mainly what is needed to enable the following standards:
802.1Qat and 802.1Qav.
The initial target of this work is the Intel i210 NIC, but other
controllers' datasheet were also taken into account, like the Renesas
RZ/A1H RZ/A1M group and the Synopsis DesignWare Ethernet QoS
controller.
Proposal
========
Feature-wise, what is covered here is the configuration interfaces for
HW implementations of the Credit-Based shaper (CBS, 802.1Qav). CBS is
a per-queue shaper. Given that this feature is related to traffic
shaping, and that the traffic control subsystem already provides a
queueing discipline that offloads config into the device driver (i.e.
mqprio), designing a new qdisc for the specific purpose of offloading
the config for the CBS shaper seemed like a good fit.
For steering traffic into the correct queues, we use the socket option
SO_PRIORITY and then a mechanism to map priority to traffic classes /
Tx queues. The qdisc mqprio is currently used in our tests.
As for the CBS config interface, this patchset is proposing a new
qdisc called 'cbs'. Its 'tc' cmd line is:
$ tc qdisc add dev IFACE parent ID cbs locredit N hicredit M sendslope S \
idleslope I
Note that the parameters for this qdisc are the ones defined by the
802.1Q-2014 spec, so no hardware specific functionality is exposed here.
Per-stream shaping, as defined by IEEE 802.1Q-2014 Section 34.6.1, is
not yet covered by this proposal.
Testing this RFC
================
Attached to this cover letter are:
- calculate_cbs_params.py: A Python script to calculate the
parameters to the CBS queueing discipline;
- tsn-talker.c: A sample C implementation of the talker side of a stream;
- tsn-listener.c: A sample C implementation of the listener side of a
stream;
For testing the patches of this series, you may want to use the
attached samples to this cover letter and use the 'mqprio' qdisc to
setup the priorities to Tx queues mapping, together with the 'cbs'
qdisc to configure the HW shaper of the i210 controller:
1) Setup priorities to traffic classes to hardware queues mapping
$ tc qdisc replace dev ens4 handle 100: parent root mqprio num_tc 3 \
map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 0
For a more detailed explanation, see mqprio(8), in short, this command
will map traffic with priority 3 to the hardware queue 0, traffic with
priority 2 to hardware queue 1, and the rest will be mapped to
hardware queues 2 and 3.
2) Check scheme. You want to get the inner qdiscs ID from the bottom up
$ tc -g class show dev ens4
Ex.:
+---(100:3) mqprio
| +---(100:6) mqprio
| +---(100:7) mqprio
|
+---(100:2) mqprio
| +---(100:5) mqprio
|
+---(100:1) mqprio
+---(100:4) mqprio
* Here '100:4' is Tx Queue #0 and '100:5' is Tx Queue #1.
3) Calculate CBS parameters for classes A and B. i.e. BW for A is 20Mbps and
for B is 10Mbps:
$ calc_cbs_params.py -A 20000 -a 1500 -B 10000 -b 1500
4) Configure CBS for traffic class A (priority 3) as provided by the script:
$ tc qdisc replace dev ens4 parent 100:4 cbs locredit -1470 \
hicredit 30 sendslope -980000 idleslope 20000
5) Configure CBS for traffic class B (priority 2):
$ tc qdisc replace dev ens4 parent 100:5 cbs \
locredit -1485 hicredit 31 sendslope -990000 idleslope 10000
6) Run Listener:
$ ./tsn-listener -d 01:AA:AA:AA:AA:AA -i ens4 -s 1500
7) Run Talker for class A (prio 3 here), compiled from samples/tsn/talker.c
$ ./tsn-talker -d 01:AA:AA:AA:AA:AA -i ens4 -p 3 -s 1500
* The bandwidth displayed on the listener output at this stage should be very
close to the one configured for class A.
8) You can also run a Talker for class B (prio 2 here and using a
different address):
$ ./tsn-talker -d 01:BB:BB:BB:BB:BB -i ens4 -s 1500
Authors
=======
- Andre Guedes <andre.guedes@intel.com>
- Ivan Briano <ivan.briano@intel.com>
- Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
- Vinicius Gomes <vinicius.gomes@intel.com>
Andre Guedes (1):
igb: Add support for CBS offload
Jesus Sanchez-Palencia (2):
mqprio: Implement select_queue class_ops
net/sched: Fix accessing invalid dev_queue
Vinicius Costa Gomes (1):
net/sched: Introduce Credit Based Shaper (CBS) qdisc
drivers/net/ethernet/intel/igb/e1000_defines.h | 23 ++
drivers/net/ethernet/intel/igb/e1000_regs.h | 8 +
drivers/net/ethernet/intel/igb/igb.h | 6 +
drivers/net/ethernet/intel/igb/igb_main.c | 347 +++++++++++++++++++++++++
include/linux/netdevice.h | 1 +
include/net/pkt_sched.h | 9 +
include/uapi/linux/pkt_sched.h | 17 ++
net/sched/Kconfig | 11 +
net/sched/Makefile | 1 +
net/sched/sch_cbs.c | 225 ++++++++++++++++
net/sched/sch_generic.c | 8 +-
net/sched/sch_mqprio.c | 7 +
12 files changed, 662 insertions(+), 1 deletion(-)
create mode 100644 net/sched/sch_cbs.c
Annex: Sample files
===================
calc_cbs_params.py
--8<---------------cut here---------------start------------->8---
#!/usr/bin/env python
#
# Copyright (c) 2017, Intel Corporation
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of Intel Corporation nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import argparse
import math
def print_cbs_params_for_class_a(args):
idleslope = args.idleslope_a
sendslope = idleslope - args.link_speed
# According to 802.1Q-2014 spec, Annex L, hiCredit and
# loCredit for SR class A are calculated following the
# equations L-10 and L-12, respectively.
hicredit = math.ceil(idleslope * args.frame_non_sr / args.link_speed)
locredit = math.ceil(sendslope * args.frame_a / args.link_speed)
print("tc qdisc add dev <IFNAME> parent <QDISC-ID> cbs idleslope %d sendslope %d hicredit %d locredit %d" % \
(idleslope, sendslope, hicredit, locredit))
def print_cbs_params_for_class_b(args):
idleslope = args.idleslope_b
sendslope = idleslope - args.link_speed
# Annex L doesn't present a straightforward equation to
# calculate hiCredit for Class B so we have to derive it
# based on generic equations presented in that Annex.
#
# L-3 is the primary equation to calculate hiCredit. Section
# L.2 states that the 'maxInterferenceSize' for SR class B
# is the maximum burst size for SR class A plus the
# maxInterferenceSize from SR class A (which is equal to the
# maximum frame from non-SR traffic).
#
# The maximum burst size for SR class A equation is shown in
# L-16. Merging L-16 into L-3 we get the resulting equation
# which calculates hiCredit B (refer to section L.3 in case
# you're not familiar with the legend):
#
# hiCredit B = Rb * ( Mo Ma )
# ---------- + ------
# Ro - Ra Ro
#
hicredit = math.ceil(idleslope * \
((args.frame_non_sr / (args.link_speed - args.idleslope_a)) + \
(args.frame_a / args.link_speed)))
# loCredit B is calculated following equation L-2.
locredit = math.ceil(sendslope * args.frame_b / args.link_speed)
print("tc qdisc add dev <IFNAME> parent <QDISC-ID> cbs idleslope %d sendslope %d hicredit %d locredit %d" % \
(idleslope, sendslope, hicredit, locredit))
def main():
parser = argparse.ArgumentParser()
parser.add_argument('-S', dest='link_speed', default=1000000.0, type=float,
help='Link speed in kbps')
parser.add_argument('-s', dest='frame_non_sr', default=1500.0, type=float,
help='Maximum frame size from non-SR traffic (MTU size'
'usually')
parser.add_argument('-A', dest='idleslope_a', default=0, type=float,
help='Idleslope for SR class A in kbps')
parser.add_argument('-a', dest='frame_a', default=0, type=float,
help='Maximum frame size for SR class A traffic')
parser.add_argument('-B', dest='idleslope_b', default=0, type=float,
help='Idleslope for SR class B in kbps')
parser.add_argument('-b', dest='frame_b', default=0, type=float,
help='Maximum frame size for SR class B traffic')
args = parser.parse_args()
if args.idleslope_a > 0:
print_cbs_params_for_class_a(args)
if args.idleslope_b > 0:
print_cbs_params_for_class_b(args)
if __name__ == "__main__":
main()
--8<---------------cut here---------------end--------------->8---
tsn-talker.c
--8<---------------cut here---------------start------------->8---
/*
* Copyright (c) 2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <alloca.h>
#include <argp.h>
#include <arpa/inet.h>
#include <inttypes.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#define MAGIC 0xCC
static uint8_t ifname[IFNAMSIZ];
static uint8_t macaddr[ETH_ALEN];
static int priority = -1;
static size_t size = 1500;
static uint64_t seq;
static int delay = -1;
static struct argp_option options[] = {
{"dst-addr", 'd', "MACADDR", 0, "Stream Destination MAC address" },
{"delay", 'D', "NUM", 0, "Delay (in us) between packet transmission" },
{"ifname", 'i', "IFNAME", 0, "Network Interface" },
{"prio", 'p', "NUM", 0, "SO_PRIORITY to be set in socket" },
{"packet-size", 's', "NUM", 0, "Size of packets to be transmitted" },
{ 0 }
};
static error_t parser(int key, char *arg, struct argp_state *state)
{
int res;
switch (key) {
case 'd':
res = sscanf(arg, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
&macaddr[0], &macaddr[1], &macaddr[2],
&macaddr[3], &macaddr[4], &macaddr[5]);
if (res != 6) {
printf("Invalid address\n");
exit(EXIT_FAILURE);
}
break;
case 'D':
delay = atoi(arg);
break;
case 'i':
strncpy(ifname, arg, sizeof(ifname) - 1);
break;
case 'p':
priority = atoi(arg);
break;
case 's':
size = atoi(arg);
break;
}
return 0;
}
static struct argp argp = { options, parser };
int main(int argc, char *argv[])
{
int fd, res;
struct ifreq req;
uint8_t *data;
struct sockaddr_ll sk_addr = {
.sll_family = AF_PACKET,
.sll_protocol = htons(ETH_P_TSN),
.sll_halen = ETH_ALEN,
};
argp_parse(&argp, argc, argv, 0, NULL, NULL);
fd = socket(AF_PACKET, SOCK_DGRAM, htons(ETH_P_TSN));
if (fd < 0) {
perror("Couldn't open socket");
return 1;
}
strncpy(req.ifr_name, ifname, sizeof(req.ifr_name));
res = ioctl(fd, SIOCGIFINDEX, &req);
if (res < 0) {
perror("Couldn't get interface index");
goto err;
}
sk_addr.sll_ifindex = req.ifr_ifindex;
memcpy(&sk_addr.sll_addr, macaddr, ETH_ALEN);
if (priority != -1) {
res = setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &priority,
sizeof(priority));
if (res < 0) {
perror("Couldn't set priority");
goto err;
}
}
data = alloca(size);
memset(data, MAGIC, size);
printf("Sending packets...\n");
while (1) {
uint64_t *seq_ptr = (uint64_t *) &data[0];
ssize_t n;
*seq_ptr = seq++;
n = sendto(fd, data, size, 0, (struct sockaddr *) &sk_addr,
sizeof(sk_addr));
if (n < 0)
perror("Failed to send data");
if (delay > 0)
usleep(delay);
}
close(fd);
return 0;
err:
close(fd);
return 1;
}
--8<---------------cut here---------------end--------------->8---
tsn-listener.c
--8<---------------cut here---------------start------------->8---
/*
* Copyright (c) 2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <alloca.h>
#include <argp.h>
#include <arpa/inet.h>
#include <inttypes.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <poll.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/timerfd.h>
#include <unistd.h>
static uint8_t ifname[IFNAMSIZ];
static uint8_t macaddr[ETH_ALEN];
static uint64_t data_count;
static int size = 1500;
static time_t interval = 1;
static bool check_seq = false;
static uint64_t expected_seq;
static struct argp_option options[] = {
{"check-seq", 'c', NULL, 0, "Check sequence number within packet" },
{"dst-addr", 'd', "MACADDR", 0, "Stream Destination MAC address" },
{"ifname", 'i', "IFNAME", 0, "Network Interface" },
{"interval", 'I', "SEC", 0, "Interval between bandwidth reports" },
{"packet-size", 's', "NUM", 0, "Expected packet size" },
{ 0 }
};
static error_t parser(int key, char *arg, struct argp_state *state)
{
int res;
switch (key) {
case 'c':
check_seq = true;
break;
case 'd':
res = sscanf(arg, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
&macaddr[0], &macaddr[1], &macaddr[2],
&macaddr[3], &macaddr[4], &macaddr[5]);
if (res != 6) {
printf("Invalid address\n");
exit(EXIT_FAILURE);
}
break;
case 'i':
strncpy(ifname, arg, sizeof(ifname) - 1);
break;
case 'I':
interval = atoi(arg);
break;
case 's':
size = atoi(arg);
break;
}
return 0;
}
static struct argp argp = { options, parser };
static int setup_timer(void)
{
int fd, res;
struct itimerspec tspec = { 0 };
fd = timerfd_create(CLOCK_MONOTONIC, 0);
if (fd < 0) {
perror("Couldn't create timer");
return -1;
}
tspec.it_value.tv_sec = interval;
tspec.it_interval.tv_sec = interval;
res = timerfd_settime(fd, 0, &tspec, NULL);
if (res < 0) {
perror("Couldn't set timer");
close(fd);
return -1;
}
return fd;
}
static int setup_socket(void)
{
int fd, res;
struct sockaddr_ll sk_addr = {
.sll_family = AF_PACKET,
.sll_protocol = htons(ETH_P_TSN),
};
fd = socket(AF_PACKET, SOCK_DGRAM, htons(ETH_P_TSN));
if (fd < 0) {
perror("Couldn't open socket");
return -1;
}
/* If user provided a network interface, bind() to it. */
if (ifname[0] != '\0') {
struct ifreq req;
strncpy(req.ifr_name, ifname, sizeof(req.ifr_name));
res = ioctl(fd, SIOCGIFINDEX, &req);
if (res < 0) {
perror("Couldn't get interface index");
goto err;
}
sk_addr.sll_ifindex = req.ifr_ifindex;
res = bind(fd, (struct sockaddr *) &sk_addr, sizeof(sk_addr));
if (res < 0) {
perror("Couldn't bind() to interface");
goto err;
}
}
/* If user provided the stream destination address, set it as multicast
* address.
*/
if (macaddr[0] != '\0') {
struct packet_mreq mreq;
mreq.mr_ifindex = sk_addr.sll_ifindex;
mreq.mr_type = PACKET_MR_MULTICAST;
mreq.mr_alen = ETH_ALEN;
memcpy(&mreq.mr_address, macaddr, ETH_ALEN);
res = setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
&mreq, sizeof(struct packet_mreq));
if (res < 0) {
perror("Couldn't set PACKET_ADD_MEMBERSHIP");
goto err;
}
}
return fd;
err:
close(fd);
return -1;
}
static void recv_packet(int fd)
{
uint8_t *data = alloca(size);
ssize_t n = recv(fd, data, size, 0);
if (n < 0) {
perror("Failed to receive data");
return;
}
if (n != size)
printf("Size mismatch: expected %d, got %d\n", size, n);
if (check_seq) {
uint64_t *seq = (uint64_t *) &data[0];
/* If 'expected_seq' is equal to zero, it means this is the
* first packet we received so we don't know what sequence
* number to expect.
*/
if (expected_seq == 0)
expected_seq = *seq;
if (*seq != expected_seq) {
printf("Sequence mismatch: expected %llu, got %llu\n",
expected_seq, *seq);
expected_seq = *seq;
}
expected_seq++;
}
data_count += n;
}
static void report_bw(int fd)
{
uint64_t expirations;
ssize_t n = read(fd, &expirations, sizeof(uint64_t));
if (n < 0) {
perror("Couldn't read timerfd");
return;
}
if (expirations != 1)
printf("Some went wrong with timerfd\n");
printf("Receiving data rate: %llu kbps\n", (data_count * 8) / (1000 * interval));
data_count = 0;
}
int main(int argc, char *argv[])
{
int sk_fd, timer_fd, res;
struct pollfd fds[2];
argp_parse(&argp, argc, argv, 0, NULL, NULL);
sk_fd = setup_socket();
if (sk_fd < 0)
return 1;
timer_fd = setup_timer();
if (timer_fd < 0) {
close(sk_fd);
return 1;
}
fds[0].fd = sk_fd;
fds[0].events = POLLIN;
fds[1].fd = timer_fd;
fds[1].events = POLLIN;
printf("Waiting for packets...\n");
while (1) {
res = poll(fds, 2, -1);
if (res < 0) {
perror("Error on poll()");
goto err;
}
if (fds[0].revents & POLLIN)
recv_packet(fds[0].fd);
if (fds[1].revents & POLLIN) {
report_bw(fds[1].fd);
}
}
close(timer_fd);
close(sk_fd);
return 0;
err:
close(timer_fd);
close(sk_fd);
return 1;
}
--8<---------------cut here---------------end--------------->8---
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