diff mbox series

[ovs-dev,v11,2/4] dpif-netdev: Show netdev offloading flags.

Message ID 20230327105013.491103-3-mkp@redhat.com
State Changes Requested
Headers show
Series Enhanced checksum support | expand

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Commit Message

Mike Pattrick March 27, 2023, 10:50 a.m. UTC
From: Flavio Leitner <fbl@sysclose.org>

This patch modifies netdev_get_status to include information about
checksum offload status by port, allowing the user to gain insight into
where checksum offloading is active.

Signed-off-by: Flavio Leitner <fbl@sysclose.org>
Co-authored-by: Mike Pattrick <mkp@redhat.com>
Signed-off-by: Mike Pattrick <mkp@redhat.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>
---
 Since v9:
  - Removed entire ovs-appctl dpif-netdev/offload-show command, replaced
    with a field in the netdev status.
  - Removed duplicative field tx_tso_offload from netdev-dpdk.c
 Since v10:
  - No change
---
 lib/dpif-netdev-unixctl.man |  6 ++++++
 lib/netdev-dpdk.c           |  5 -----
 lib/netdev-provider.h       |  1 +
 lib/netdev.c                | 29 ++++++++++++++++++++++++++---
 tests/dpif-netdev.at        | 18 ++++++++++++++++++
 5 files changed, 51 insertions(+), 8 deletions(-)

Comments

Simon Horman March 31, 2023, 11:53 a.m. UTC | #1
On Mon, Mar 27, 2023 at 06:50:11AM -0400, Mike Pattrick wrote:
> From: Flavio Leitner <fbl@sysclose.org>
> 
> This patch modifies netdev_get_status to include information about
> checksum offload status by port, allowing the user to gain insight into
> where checksum offloading is active.
> 
> Signed-off-by: Flavio Leitner <fbl@sysclose.org>
> Co-authored-by: Mike Pattrick <mkp@redhat.com>
> Signed-off-by: Mike Pattrick <mkp@redhat.com>
> Reviewed-by: David Marchand <david.marchand@redhat.com>

Reviewed-by: Simon Horman <simon.horman@corigine.com>
Ilya Maximets April 28, 2023, 10:47 p.m. UTC | #2
On 3/27/23 12:50, Mike Pattrick wrote:
> From: Flavio Leitner <fbl@sysclose.org>
> 
> This patch modifies netdev_get_status to include information about
> checksum offload status by port, allowing the user to gain insight into
> where checksum offloading is active.
> 
> Signed-off-by: Flavio Leitner <fbl@sysclose.org>
> Co-authored-by: Mike Pattrick <mkp@redhat.com>
> Signed-off-by: Mike Pattrick <mkp@redhat.com>
> Reviewed-by: David Marchand <david.marchand@redhat.com>
> ---
>  Since v9:
>   - Removed entire ovs-appctl dpif-netdev/offload-show command, replaced
>     with a field in the netdev status.
>   - Removed duplicative field tx_tso_offload from netdev-dpdk.c
>  Since v10:
>   - No change
> ---
>  lib/dpif-netdev-unixctl.man |  6 ++++++
>  lib/netdev-dpdk.c           |  5 -----
>  lib/netdev-provider.h       |  1 +
>  lib/netdev.c                | 29 ++++++++++++++++++++++++++---
>  tests/dpif-netdev.at        | 18 ++++++++++++++++++
>  5 files changed, 51 insertions(+), 8 deletions(-)
> 
> diff --git a/lib/dpif-netdev-unixctl.man b/lib/dpif-netdev-unixctl.man
> index 8cd847416..2840d462e 100644
> --- a/lib/dpif-netdev-unixctl.man
> +++ b/lib/dpif-netdev-unixctl.man
> @@ -262,3 +262,9 @@ PMDs in the case where no value is specified.  By default "scalar" is used.
>  \fIstudy_cnt\fR defaults to 128 and indicates the number of packets that the
>  "study" miniflow implementation must parse before choosing an optimal
>  implementation.
> +.
> +.IP "\fBdpif-netdev/offload-show\fR [\fIdp\fR] [\fInetdev\fR]"
> +Prints the hardware offloading features enabled in netdev \fInetdev\fR
> +attached to datapath \fIdp\fR. The datapath \fIdp\fR parameter can be
> +omitted if there is only one. All netdev ports are printed if the
> +parameter \fInetdev\fR is omitted.

We don't have an appctl anymore in this version, so this documentation
change is now misleading.

> diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
> index fb0dd43f7..560694dbc 100644
> --- a/lib/netdev-dpdk.c
> +++ b/lib/netdev-dpdk.c
> @@ -1753,11 +1753,6 @@ netdev_dpdk_get_config(const struct netdev *netdev, struct smap *args)
>          } else {
>              smap_add(args, "rx_csum_offload", "false");
>          }
> -        if (dev->hw_ol_features & NETDEV_TX_TSO_OFFLOAD) {
> -            smap_add(args, "tx_tso_offload", "true");
> -        } else {
> -            smap_add(args, "tx_tso_offload", "false");
> -        }
>          smap_add(args, "lsc_interrupt_mode",
>                   dev->lsc_interrupt_mode ? "true" : "false");
>  
> diff --git a/lib/netdev-provider.h b/lib/netdev-provider.h
> index b5420947d..fcf52bdd9 100644
> --- a/lib/netdev-provider.h
> +++ b/lib/netdev-provider.h
> @@ -37,6 +37,7 @@ extern "C" {
>  struct netdev_tnl_build_header_params;
>  #define NETDEV_NUMA_UNSPEC OVS_NUMA_UNSPEC
>  
> +/* Keep this enum updated with translation to string below. */
>  enum netdev_ol_flags {
>      NETDEV_TX_OFFLOAD_IPV4_CKSUM = 1 << 0,
>      NETDEV_TX_OFFLOAD_TCP_CKSUM = 1 << 1,
> diff --git a/lib/netdev.c b/lib/netdev.c
> index c79778378..818589246 100644
> --- a/lib/netdev.c
> +++ b/lib/netdev.c
> @@ -43,6 +43,7 @@
>  #include "netdev-provider.h"
>  #include "netdev-vport.h"
>  #include "odp-netlink.h"
> +#include "openvswitch/json.h"
>  #include "openflow/openflow.h"
>  #include "packets.h"
>  #include "openvswitch/ofp-print.h"
> @@ -1373,9 +1374,31 @@ netdev_get_next_hop(const struct netdev *netdev,
>  int
>  netdev_get_status(const struct netdev *netdev, struct smap *smap)
>  {
> -    return (netdev->netdev_class->get_status
> -            ? netdev->netdev_class->get_status(netdev, smap)
> -            : EOPNOTSUPP);
> +    int err = EOPNOTSUPP;
> +
> +    /* Set offload status only if relevant. */
> +    if (netdev_get_dpif_type(netdev) &&
> +        strcmp(netdev_get_dpif_type(netdev), "system")) {
> +
> +#define OL_ADD_STAT(name, bit) \
> +        smap_add(smap, name "_csum_offload", \
> +                 netdev->ol_flags & bit ? "true" : "false");
> +
> +        OL_ADD_STAT("ip", NETDEV_TX_OFFLOAD_IPV4_CKSUM);
> +        OL_ADD_STAT("tcp", NETDEV_TX_OFFLOAD_TCP_CKSUM);
> +        OL_ADD_STAT("udp", NETDEV_TX_OFFLOAD_UDP_CKSUM);
> +        OL_ADD_STAT("sctp", NETDEV_TX_OFFLOAD_SCTP_CKSUM);
> +        OL_ADD_STAT("tso", NETDEV_TX_OFFLOAD_TCP_TSO);

The 'tso_csum_offload' name doesn't make a lot of sense.
'TCP segmentation offload checksum offload'.  It might be better to call
it tcp_seg_offload.  It might also be good to specify the direction,
because interface may technically support Tx, but not support Rx offload
for the same thing.
So, maybe tx-ip-csum-offload, ..., tx-tcp-seg-offload ?
You had something very similar in v9.

I'm not sure about underscores vs dashes.  I'd like dashes, but some other
status fields are reported with underscores, so I don't know.

(NETDEV_TX_OFFLOAD_TCP_TSO also a bit weird name, but that's out of the
scope of this patch.)

> +#undef OL_ADD_STAT
> +
> +        err = 0;
> +    }
> +
> +    if (!netdev->netdev_class->get_status) {
> +        return err;
> +    }
> +
> +    return netdev->netdev_class->get_status(netdev, smap);
>  }
>  
>  /* Returns all assigned IP address to  'netdev' and returns 0.
> diff --git a/tests/dpif-netdev.at b/tests/dpif-netdev.at
> index baab60a22..8a663a4b6 100644
> --- a/tests/dpif-netdev.at
> +++ b/tests/dpif-netdev.at
> @@ -650,6 +650,24 @@ AT_CHECK([ovs-appctl revalidator/resume])
>  OVS_VSWITCHD_STOP
>  AT_CLEANUP
>  
> +AT_SETUP([dpif-netdev - check dpif-netdev/offload-show])
> +OVS_VSWITCHD_START(
> +  [add-port br0 p1 \
> +   -- set interface p1 type=dummy options:pstream=punix:$OVS_RUNDIR/p0.sock \
> +   -- set bridge br0 datapath-type=dummy \
> +                     other-config:datapath-id=1234 fail-mode=secure])
> +
> +AT_CHECK([ovs-vsctl list interface p1 | sed -n 's/^status.*{\(.*\).*}$/\1/p'], [0], [dnl

You may use the 'get interface p1 status' instead.

> +ip_csum_offload="false", sctp_csum_offload="false", tcp_csum_offload="false", tso_csum_offload="false", udp_csum_offload="false"
> +], [])
> +
> +AT_CHECK([ovs-vsctl list interface br0 | sed -n 's/^status.*{\(.*\).*}$/\1/p'], [0], [dnl
> +ip_csum_offload="false", sctp_csum_offload="false", tcp_csum_offload="false", tso_csum_offload="false", udp_csum_offload="false"
> +], [])
> +
> +OVS_VSWITCHD_STOP
> +AT_CLEANUP
> +
>  # SEND_UDP_PKTS([p_name], [p_ofport])
>  #
>  # Sends 128 packets to port 'p_name' with different UDP destination ports.
Mike Pattrick May 2, 2023, 1:35 p.m. UTC | #3
On Fri, Apr 28, 2023 at 6:46 PM Ilya Maximets <i.maximets@ovn.org> wrote:
>
> On 3/27/23 12:50, Mike Pattrick wrote:
> > From: Flavio Leitner <fbl@sysclose.org>
> >
> > This patch modifies netdev_get_status to include information about
> > checksum offload status by port, allowing the user to gain insight into
> > where checksum offloading is active.
> >
> > Signed-off-by: Flavio Leitner <fbl@sysclose.org>
> > Co-authored-by: Mike Pattrick <mkp@redhat.com>
> > Signed-off-by: Mike Pattrick <mkp@redhat.com>
> > Reviewed-by: David Marchand <david.marchand@redhat.com>
> > ---
> >  Since v9:
> >   - Removed entire ovs-appctl dpif-netdev/offload-show command, replaced
> >     with a field in the netdev status.
> >   - Removed duplicative field tx_tso_offload from netdev-dpdk.c
> >  Since v10:
> >   - No change
> > ---
> >  lib/dpif-netdev-unixctl.man |  6 ++++++
> >  lib/netdev-dpdk.c           |  5 -----
> >  lib/netdev-provider.h       |  1 +
> >  lib/netdev.c                | 29 ++++++++++++++++++++++++++---
> >  tests/dpif-netdev.at        | 18 ++++++++++++++++++
> >  5 files changed, 51 insertions(+), 8 deletions(-)
> >
> > diff --git a/lib/dpif-netdev-unixctl.man b/lib/dpif-netdev-unixctl.man
> > index 8cd847416..2840d462e 100644
> > --- a/lib/dpif-netdev-unixctl.man
> > +++ b/lib/dpif-netdev-unixctl.man
> > @@ -262,3 +262,9 @@ PMDs in the case where no value is specified.  By default "scalar" is used.
> >  \fIstudy_cnt\fR defaults to 128 and indicates the number of packets that the
> >  "study" miniflow implementation must parse before choosing an optimal
> >  implementation.
> > +.
> > +.IP "\fBdpif-netdev/offload-show\fR [\fIdp\fR] [\fInetdev\fR]"
> > +Prints the hardware offloading features enabled in netdev \fInetdev\fR
> > +attached to datapath \fIdp\fR. The datapath \fIdp\fR parameter can be
> > +omitted if there is only one. All netdev ports are printed if the
> > +parameter \fInetdev\fR is omitted.
>
> We don't have an appctl anymore in this version, so this documentation
> change is now misleading.
>
> > diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
> > index fb0dd43f7..560694dbc 100644
> > --- a/lib/netdev-dpdk.c
> > +++ b/lib/netdev-dpdk.c
> > @@ -1753,11 +1753,6 @@ netdev_dpdk_get_config(const struct netdev *netdev, struct smap *args)
> >          } else {
> >              smap_add(args, "rx_csum_offload", "false");
> >          }
> > -        if (dev->hw_ol_features & NETDEV_TX_TSO_OFFLOAD) {
> > -            smap_add(args, "tx_tso_offload", "true");
> > -        } else {
> > -            smap_add(args, "tx_tso_offload", "false");
> > -        }
> >          smap_add(args, "lsc_interrupt_mode",
> >                   dev->lsc_interrupt_mode ? "true" : "false");
> >
> > diff --git a/lib/netdev-provider.h b/lib/netdev-provider.h
> > index b5420947d..fcf52bdd9 100644
> > --- a/lib/netdev-provider.h
> > +++ b/lib/netdev-provider.h
> > @@ -37,6 +37,7 @@ extern "C" {
> >  struct netdev_tnl_build_header_params;
> >  #define NETDEV_NUMA_UNSPEC OVS_NUMA_UNSPEC
> >
> > +/* Keep this enum updated with translation to string below. */
> >  enum netdev_ol_flags {
> >      NETDEV_TX_OFFLOAD_IPV4_CKSUM = 1 << 0,
> >      NETDEV_TX_OFFLOAD_TCP_CKSUM = 1 << 1,
> > diff --git a/lib/netdev.c b/lib/netdev.c
> > index c79778378..818589246 100644
> > --- a/lib/netdev.c
> > +++ b/lib/netdev.c
> > @@ -43,6 +43,7 @@
> >  #include "netdev-provider.h"
> >  #include "netdev-vport.h"
> >  #include "odp-netlink.h"
> > +#include "openvswitch/json.h"
> >  #include "openflow/openflow.h"
> >  #include "packets.h"
> >  #include "openvswitch/ofp-print.h"
> > @@ -1373,9 +1374,31 @@ netdev_get_next_hop(const struct netdev *netdev,
> >  int
> >  netdev_get_status(const struct netdev *netdev, struct smap *smap)
> >  {
> > -    return (netdev->netdev_class->get_status
> > -            ? netdev->netdev_class->get_status(netdev, smap)
> > -            : EOPNOTSUPP);
> > +    int err = EOPNOTSUPP;
> > +
> > +    /* Set offload status only if relevant. */
> > +    if (netdev_get_dpif_type(netdev) &&
> > +        strcmp(netdev_get_dpif_type(netdev), "system")) {
> > +
> > +#define OL_ADD_STAT(name, bit) \
> > +        smap_add(smap, name "_csum_offload", \
> > +                 netdev->ol_flags & bit ? "true" : "false");
> > +
> > +        OL_ADD_STAT("ip", NETDEV_TX_OFFLOAD_IPV4_CKSUM);
> > +        OL_ADD_STAT("tcp", NETDEV_TX_OFFLOAD_TCP_CKSUM);
> > +        OL_ADD_STAT("udp", NETDEV_TX_OFFLOAD_UDP_CKSUM);
> > +        OL_ADD_STAT("sctp", NETDEV_TX_OFFLOAD_SCTP_CKSUM);
> > +        OL_ADD_STAT("tso", NETDEV_TX_OFFLOAD_TCP_TSO);
>
> The 'tso_csum_offload' name doesn't make a lot of sense.
> 'TCP segmentation offload checksum offload'.  It might be better to call
> it tcp_seg_offload.  It might also be good to specify the direction,
> because interface may technically support Tx, but not support Rx offload
> for the same thing.
> So, maybe tx-ip-csum-offload, ..., tx-tcp-seg-offload ?
> You had something very similar in v9.
>
> I'm not sure about underscores vs dashes.  I'd like dashes, but some other
> status fields are reported with underscores, so I don't know.

Underscore seems to be the default for status fields as far as I can
tell. I don't have a preference other than consistency. If dashes are
preferable, wouldn't it make sense to homogenize all fields to the
same separator?

-M

>
> (NETDEV_TX_OFFLOAD_TCP_TSO also a bit weird name, but that's out of the
> scope of this patch.)
>
> > +#undef OL_ADD_STAT
> > +
> > +        err = 0;
> > +    }
> > +
> > +    if (!netdev->netdev_class->get_status) {
> > +        return err;
> > +    }
> > +
> > +    return netdev->netdev_class->get_status(netdev, smap);
> >  }
> >
> >  /* Returns all assigned IP address to  'netdev' and returns 0.
> > diff --git a/tests/dpif-netdev.at b/tests/dpif-netdev.at
> > index baab60a22..8a663a4b6 100644
> > --- a/tests/dpif-netdev.at
> > +++ b/tests/dpif-netdev.at
> > @@ -650,6 +650,24 @@ AT_CHECK([ovs-appctl revalidator/resume])
> >  OVS_VSWITCHD_STOP
> >  AT_CLEANUP
> >
> > +AT_SETUP([dpif-netdev - check dpif-netdev/offload-show])
> > +OVS_VSWITCHD_START(
> > +  [add-port br0 p1 \
> > +   -- set interface p1 type=dummy options:pstream=punix:$OVS_RUNDIR/p0.sock \
> > +   -- set bridge br0 datapath-type=dummy \
> > +                     other-config:datapath-id=1234 fail-mode=secure])
> > +
> > +AT_CHECK([ovs-vsctl list interface p1 | sed -n 's/^status.*{\(.*\).*}$/\1/p'], [0], [dnl
>
> You may use the 'get interface p1 status' instead.
>
> > +ip_csum_offload="false", sctp_csum_offload="false", tcp_csum_offload="false", tso_csum_offload="false", udp_csum_offload="false"
> > +], [])
> > +
> > +AT_CHECK([ovs-vsctl list interface br0 | sed -n 's/^status.*{\(.*\).*}$/\1/p'], [0], [dnl
> > +ip_csum_offload="false", sctp_csum_offload="false", tcp_csum_offload="false", tso_csum_offload="false", udp_csum_offload="false"
> > +], [])
> > +
> > +OVS_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> >  # SEND_UDP_PKTS([p_name], [p_ofport])
> >  #
> >  # Sends 128 packets to port 'p_name' with different UDP destination ports.
>
Ilya Maximets May 2, 2023, 2:13 p.m. UTC | #4
On 5/2/23 15:35, Mike Pattrick wrote:
> On Fri, Apr 28, 2023 at 6:46 PM Ilya Maximets <i.maximets@ovn.org> wrote:
>>
>> On 3/27/23 12:50, Mike Pattrick wrote:
>>> From: Flavio Leitner <fbl@sysclose.org>
>>>
>>> This patch modifies netdev_get_status to include information about
>>> checksum offload status by port, allowing the user to gain insight into
>>> where checksum offloading is active.
>>>
>>> Signed-off-by: Flavio Leitner <fbl@sysclose.org>
>>> Co-authored-by: Mike Pattrick <mkp@redhat.com>
>>> Signed-off-by: Mike Pattrick <mkp@redhat.com>
>>> Reviewed-by: David Marchand <david.marchand@redhat.com>
>>> ---
>>>  Since v9:
>>>   - Removed entire ovs-appctl dpif-netdev/offload-show command, replaced
>>>     with a field in the netdev status.
>>>   - Removed duplicative field tx_tso_offload from netdev-dpdk.c
>>>  Since v10:
>>>   - No change
>>> ---
>>>  lib/dpif-netdev-unixctl.man |  6 ++++++
>>>  lib/netdev-dpdk.c           |  5 -----
>>>  lib/netdev-provider.h       |  1 +
>>>  lib/netdev.c                | 29 ++++++++++++++++++++++++++---
>>>  tests/dpif-netdev.at        | 18 ++++++++++++++++++
>>>  5 files changed, 51 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/lib/dpif-netdev-unixctl.man b/lib/dpif-netdev-unixctl.man
>>> index 8cd847416..2840d462e 100644
>>> --- a/lib/dpif-netdev-unixctl.man
>>> +++ b/lib/dpif-netdev-unixctl.man
>>> @@ -262,3 +262,9 @@ PMDs in the case where no value is specified.  By default "scalar" is used.
>>>  \fIstudy_cnt\fR defaults to 128 and indicates the number of packets that the
>>>  "study" miniflow implementation must parse before choosing an optimal
>>>  implementation.
>>> +.
>>> +.IP "\fBdpif-netdev/offload-show\fR [\fIdp\fR] [\fInetdev\fR]"
>>> +Prints the hardware offloading features enabled in netdev \fInetdev\fR
>>> +attached to datapath \fIdp\fR. The datapath \fIdp\fR parameter can be
>>> +omitted if there is only one. All netdev ports are printed if the
>>> +parameter \fInetdev\fR is omitted.
>>
>> We don't have an appctl anymore in this version, so this documentation
>> change is now misleading.
>>
>>> diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
>>> index fb0dd43f7..560694dbc 100644
>>> --- a/lib/netdev-dpdk.c
>>> +++ b/lib/netdev-dpdk.c
>>> @@ -1753,11 +1753,6 @@ netdev_dpdk_get_config(const struct netdev *netdev, struct smap *args)
>>>          } else {
>>>              smap_add(args, "rx_csum_offload", "false");
>>>          }
>>> -        if (dev->hw_ol_features & NETDEV_TX_TSO_OFFLOAD) {
>>> -            smap_add(args, "tx_tso_offload", "true");
>>> -        } else {
>>> -            smap_add(args, "tx_tso_offload", "false");
>>> -        }
>>>          smap_add(args, "lsc_interrupt_mode",
>>>                   dev->lsc_interrupt_mode ? "true" : "false");
>>>
>>> diff --git a/lib/netdev-provider.h b/lib/netdev-provider.h
>>> index b5420947d..fcf52bdd9 100644
>>> --- a/lib/netdev-provider.h
>>> +++ b/lib/netdev-provider.h
>>> @@ -37,6 +37,7 @@ extern "C" {
>>>  struct netdev_tnl_build_header_params;
>>>  #define NETDEV_NUMA_UNSPEC OVS_NUMA_UNSPEC
>>>
>>> +/* Keep this enum updated with translation to string below. */
>>>  enum netdev_ol_flags {
>>>      NETDEV_TX_OFFLOAD_IPV4_CKSUM = 1 << 0,
>>>      NETDEV_TX_OFFLOAD_TCP_CKSUM = 1 << 1,
>>> diff --git a/lib/netdev.c b/lib/netdev.c
>>> index c79778378..818589246 100644
>>> --- a/lib/netdev.c
>>> +++ b/lib/netdev.c
>>> @@ -43,6 +43,7 @@
>>>  #include "netdev-provider.h"
>>>  #include "netdev-vport.h"
>>>  #include "odp-netlink.h"
>>> +#include "openvswitch/json.h"
>>>  #include "openflow/openflow.h"
>>>  #include "packets.h"
>>>  #include "openvswitch/ofp-print.h"
>>> @@ -1373,9 +1374,31 @@ netdev_get_next_hop(const struct netdev *netdev,
>>>  int
>>>  netdev_get_status(const struct netdev *netdev, struct smap *smap)
>>>  {
>>> -    return (netdev->netdev_class->get_status
>>> -            ? netdev->netdev_class->get_status(netdev, smap)
>>> -            : EOPNOTSUPP);
>>> +    int err = EOPNOTSUPP;
>>> +
>>> +    /* Set offload status only if relevant. */
>>> +    if (netdev_get_dpif_type(netdev) &&
>>> +        strcmp(netdev_get_dpif_type(netdev), "system")) {
>>> +
>>> +#define OL_ADD_STAT(name, bit) \
>>> +        smap_add(smap, name "_csum_offload", \
>>> +                 netdev->ol_flags & bit ? "true" : "false");
>>> +
>>> +        OL_ADD_STAT("ip", NETDEV_TX_OFFLOAD_IPV4_CKSUM);
>>> +        OL_ADD_STAT("tcp", NETDEV_TX_OFFLOAD_TCP_CKSUM);
>>> +        OL_ADD_STAT("udp", NETDEV_TX_OFFLOAD_UDP_CKSUM);
>>> +        OL_ADD_STAT("sctp", NETDEV_TX_OFFLOAD_SCTP_CKSUM);
>>> +        OL_ADD_STAT("tso", NETDEV_TX_OFFLOAD_TCP_TSO);
>>
>> The 'tso_csum_offload' name doesn't make a lot of sense.
>> 'TCP segmentation offload checksum offload'.  It might be better to call
>> it tcp_seg_offload.  It might also be good to specify the direction,
>> because interface may technically support Tx, but not support Rx offload
>> for the same thing.
>> So, maybe tx-ip-csum-offload, ..., tx-tcp-seg-offload ?
>> You had something very similar in v9.
>>
>> I'm not sure about underscores vs dashes.  I'd like dashes, but some other
>> status fields are reported with underscores, so I don't know.
> 
> Underscore seems to be the default for status fields as far as I can
> tell. I don't have a preference other than consistency. If dashes are
> preferable, wouldn't it make sense to homogenize all fields to the
> same separator?

I don't have a strong opinion here.  I personally like more when
use-facing names and options are using dashes.  Underscores are
less user-friendly.  (Database automatically converts one to another
in table/column names, for example.)
Let's keep upderscores for now.  The global change would be out
of scope of this patch set.

Best regards, Ilya Maximets.
diff mbox series

Patch

diff --git a/lib/dpif-netdev-unixctl.man b/lib/dpif-netdev-unixctl.man
index 8cd847416..2840d462e 100644
--- a/lib/dpif-netdev-unixctl.man
+++ b/lib/dpif-netdev-unixctl.man
@@ -262,3 +262,9 @@  PMDs in the case where no value is specified.  By default "scalar" is used.
 \fIstudy_cnt\fR defaults to 128 and indicates the number of packets that the
 "study" miniflow implementation must parse before choosing an optimal
 implementation.
+.
+.IP "\fBdpif-netdev/offload-show\fR [\fIdp\fR] [\fInetdev\fR]"
+Prints the hardware offloading features enabled in netdev \fInetdev\fR
+attached to datapath \fIdp\fR. The datapath \fIdp\fR parameter can be
+omitted if there is only one. All netdev ports are printed if the
+parameter \fInetdev\fR is omitted.
diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index fb0dd43f7..560694dbc 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -1753,11 +1753,6 @@  netdev_dpdk_get_config(const struct netdev *netdev, struct smap *args)
         } else {
             smap_add(args, "rx_csum_offload", "false");
         }
-        if (dev->hw_ol_features & NETDEV_TX_TSO_OFFLOAD) {
-            smap_add(args, "tx_tso_offload", "true");
-        } else {
-            smap_add(args, "tx_tso_offload", "false");
-        }
         smap_add(args, "lsc_interrupt_mode",
                  dev->lsc_interrupt_mode ? "true" : "false");
 
diff --git a/lib/netdev-provider.h b/lib/netdev-provider.h
index b5420947d..fcf52bdd9 100644
--- a/lib/netdev-provider.h
+++ b/lib/netdev-provider.h
@@ -37,6 +37,7 @@  extern "C" {
 struct netdev_tnl_build_header_params;
 #define NETDEV_NUMA_UNSPEC OVS_NUMA_UNSPEC
 
+/* Keep this enum updated with translation to string below. */
 enum netdev_ol_flags {
     NETDEV_TX_OFFLOAD_IPV4_CKSUM = 1 << 0,
     NETDEV_TX_OFFLOAD_TCP_CKSUM = 1 << 1,
diff --git a/lib/netdev.c b/lib/netdev.c
index c79778378..818589246 100644
--- a/lib/netdev.c
+++ b/lib/netdev.c
@@ -43,6 +43,7 @@ 
 #include "netdev-provider.h"
 #include "netdev-vport.h"
 #include "odp-netlink.h"
+#include "openvswitch/json.h"
 #include "openflow/openflow.h"
 #include "packets.h"
 #include "openvswitch/ofp-print.h"
@@ -1373,9 +1374,31 @@  netdev_get_next_hop(const struct netdev *netdev,
 int
 netdev_get_status(const struct netdev *netdev, struct smap *smap)
 {
-    return (netdev->netdev_class->get_status
-            ? netdev->netdev_class->get_status(netdev, smap)
-            : EOPNOTSUPP);
+    int err = EOPNOTSUPP;
+
+    /* Set offload status only if relevant. */
+    if (netdev_get_dpif_type(netdev) &&
+        strcmp(netdev_get_dpif_type(netdev), "system")) {
+
+#define OL_ADD_STAT(name, bit) \
+        smap_add(smap, name "_csum_offload", \
+                 netdev->ol_flags & bit ? "true" : "false");
+
+        OL_ADD_STAT("ip", NETDEV_TX_OFFLOAD_IPV4_CKSUM);
+        OL_ADD_STAT("tcp", NETDEV_TX_OFFLOAD_TCP_CKSUM);
+        OL_ADD_STAT("udp", NETDEV_TX_OFFLOAD_UDP_CKSUM);
+        OL_ADD_STAT("sctp", NETDEV_TX_OFFLOAD_SCTP_CKSUM);
+        OL_ADD_STAT("tso", NETDEV_TX_OFFLOAD_TCP_TSO);
+#undef OL_ADD_STAT
+
+        err = 0;
+    }
+
+    if (!netdev->netdev_class->get_status) {
+        return err;
+    }
+
+    return netdev->netdev_class->get_status(netdev, smap);
 }
 
 /* Returns all assigned IP address to  'netdev' and returns 0.
diff --git a/tests/dpif-netdev.at b/tests/dpif-netdev.at
index baab60a22..8a663a4b6 100644
--- a/tests/dpif-netdev.at
+++ b/tests/dpif-netdev.at
@@ -650,6 +650,24 @@  AT_CHECK([ovs-appctl revalidator/resume])
 OVS_VSWITCHD_STOP
 AT_CLEANUP
 
+AT_SETUP([dpif-netdev - check dpif-netdev/offload-show])
+OVS_VSWITCHD_START(
+  [add-port br0 p1 \
+   -- set interface p1 type=dummy options:pstream=punix:$OVS_RUNDIR/p0.sock \
+   -- set bridge br0 datapath-type=dummy \
+                     other-config:datapath-id=1234 fail-mode=secure])
+
+AT_CHECK([ovs-vsctl list interface p1 | sed -n 's/^status.*{\(.*\).*}$/\1/p'], [0], [dnl
+ip_csum_offload="false", sctp_csum_offload="false", tcp_csum_offload="false", tso_csum_offload="false", udp_csum_offload="false"
+], [])
+
+AT_CHECK([ovs-vsctl list interface br0 | sed -n 's/^status.*{\(.*\).*}$/\1/p'], [0], [dnl
+ip_csum_offload="false", sctp_csum_offload="false", tcp_csum_offload="false", tso_csum_offload="false", udp_csum_offload="false"
+], [])
+
+OVS_VSWITCHD_STOP
+AT_CLEANUP
+
 # SEND_UDP_PKTS([p_name], [p_ofport])
 #
 # Sends 128 packets to port 'p_name' with different UDP destination ports.