| Message ID | 20241009005525.13651-7-jdamato@fastly.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | Add support for per-NAPI config via netlink | expand |
On Wed, Oct 9, 2024 at 2:56 AM Joe Damato <jdamato@fastly.com> wrote: > > Add support to set per-NAPI defer_hard_irqs and gro_flush_timeout. > > Signed-off-by: Joe Damato <jdamato@fastly.com> > --- > Documentation/netlink/specs/netdev.yaml | 11 ++++++ > include/uapi/linux/netdev.h | 1 + > net/core/netdev-genl-gen.c | 18 ++++++++++ > net/core/netdev-genl-gen.h | 1 + > net/core/netdev-genl.c | 45 +++++++++++++++++++++++++ > tools/include/uapi/linux/netdev.h | 1 + > 6 files changed, 77 insertions(+) > > diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml > index bf13613eaa0d..7b4ea5a6e73d 100644 > --- a/Documentation/netlink/specs/netdev.yaml > +++ b/Documentation/netlink/specs/netdev.yaml > @@ -690,6 +690,17 @@ operations: > reply: > attributes: > - id > + - > + name: napi-set > + doc: Set configurable NAPI instance settings. > + attribute-set: napi > + flags: [ admin-perm ] > + do: > + request: > + attributes: > + - id > + - defer-hard-irqs > + - gro-flush-timeout > > kernel-family: > headers: [ "linux/list.h"] > diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h > index cacd33359c76..e3ebb49f60d2 100644 > --- a/include/uapi/linux/netdev.h > +++ b/include/uapi/linux/netdev.h > @@ -201,6 +201,7 @@ enum { > NETDEV_CMD_NAPI_GET, > NETDEV_CMD_QSTATS_GET, > NETDEV_CMD_BIND_RX, > + NETDEV_CMD_NAPI_SET, > > __NETDEV_CMD_MAX, > NETDEV_CMD_MAX = (__NETDEV_CMD_MAX - 1) > diff --git a/net/core/netdev-genl-gen.c b/net/core/netdev-genl-gen.c > index b28424ae06d5..e197bd84997c 100644 > --- a/net/core/netdev-genl-gen.c > +++ b/net/core/netdev-genl-gen.c > @@ -22,6 +22,10 @@ static const struct netlink_range_validation netdev_a_page_pool_ifindex_range = > .max = 2147483647ULL, > }; > > +static const struct netlink_range_validation netdev_a_napi_defer_hard_irqs_range = { > + .max = 2147483647ULL, Would (u64)INT_MAX work ? > +}; > + > /* Common nested types */ > const struct nla_policy netdev_page_pool_info_nl_policy[NETDEV_A_PAGE_POOL_IFINDEX + 1] = { > [NETDEV_A_PAGE_POOL_ID] = NLA_POLICY_FULL_RANGE(NLA_UINT, &netdev_a_page_pool_id_range), > @@ -87,6 +91,13 @@ static const struct nla_policy netdev_bind_rx_nl_policy[NETDEV_A_DMABUF_FD + 1] > [NETDEV_A_DMABUF_QUEUES] = NLA_POLICY_NESTED(netdev_queue_id_nl_policy), > }; > > +/* NETDEV_CMD_NAPI_SET - do */ > +static const struct nla_policy netdev_napi_set_nl_policy[NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT + 1] = { > + [NETDEV_A_NAPI_ID] = { .type = NLA_U32, }, > + [NETDEV_A_NAPI_DEFER_HARD_IRQS] = NLA_POLICY_FULL_RANGE(NLA_U32, &netdev_a_napi_defer_hard_irqs_range), > + [NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT] = { .type = NLA_UINT, }, > +}; > + > /* Ops table for netdev */ > static const struct genl_split_ops netdev_nl_ops[] = { > { > @@ -171,6 +182,13 @@ static const struct genl_split_ops netdev_nl_ops[] = { > .maxattr = NETDEV_A_DMABUF_FD, > .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO, > }, > + { > + .cmd = NETDEV_CMD_NAPI_SET, > + .doit = netdev_nl_napi_set_doit, > + .policy = netdev_napi_set_nl_policy, > + .maxattr = NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT, > + .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO, > + }, > }; > > static const struct genl_multicast_group netdev_nl_mcgrps[] = { > diff --git a/net/core/netdev-genl-gen.h b/net/core/netdev-genl-gen.h > index 8cda334fd042..e09dd7539ff2 100644 > --- a/net/core/netdev-genl-gen.h > +++ b/net/core/netdev-genl-gen.h > @@ -33,6 +33,7 @@ int netdev_nl_napi_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb); > int netdev_nl_qstats_get_dumpit(struct sk_buff *skb, > struct netlink_callback *cb); > int netdev_nl_bind_rx_doit(struct sk_buff *skb, struct genl_info *info); > +int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info); > > enum { > NETDEV_NLGRP_MGMT, > diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c > index 64e5e4cee60d..59523318d620 100644 > --- a/net/core/netdev-genl.c > +++ b/net/core/netdev-genl.c > @@ -303,6 +303,51 @@ int netdev_nl_napi_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) > return err; > } > > +static int > +netdev_nl_napi_set_config(struct napi_struct *napi, struct genl_info *info) > +{ > + u64 gro_flush_timeout = 0; > + u32 defer = 0; > + > + if (info->attrs[NETDEV_A_NAPI_DEFER_HARD_IRQS]) { > + defer = nla_get_u32(info->attrs[NETDEV_A_NAPI_DEFER_HARD_IRQS]); > + napi_set_defer_hard_irqs(napi, defer); > + } > + > + if (info->attrs[NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT]) { > + gro_flush_timeout = nla_get_uint(info->attrs[NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT]); > + napi_set_gro_flush_timeout(napi, gro_flush_timeout); > + } > + > + return 0; > +} > + > +int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info) > +{ > + struct napi_struct *napi; > + unsigned int napi_id; > + int err; > + > + if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID)) > + return -EINVAL; > + > + napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]); > + > + rtnl_lock(); Hmm.... please see my patch there : https://patchwork.kernel.org/project/netdevbpf/patch/20241009232728.107604-2-edumazet@google.com/ Lets not add another rtnl_lock() :/ > + > + napi = napi_by_id(napi_id); > + if (napi) { > + err = netdev_nl_napi_set_config(napi, info); > + } else { > + NL_SET_BAD_ATTR(info->extack, info->attrs[NETDEV_A_NAPI_ID]); > + err = -ENOENT; > + } > + > + rtnl_unlock(); > + > + return err; > +} > + > static int > netdev_nl_queue_fill_one(struct sk_buff *rsp, struct net_device *netdev, > u32 q_idx, u32 q_type, const struct genl_info *info) > diff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h > index cacd33359c76..e3ebb49f60d2 100644 > --- a/tools/include/uapi/linux/netdev.h > +++ b/tools/include/uapi/linux/netdev.h > @@ -201,6 +201,7 @@ enum { > NETDEV_CMD_NAPI_GET, > NETDEV_CMD_QSTATS_GET, > NETDEV_CMD_BIND_RX, > + NETDEV_CMD_NAPI_SET, > > __NETDEV_CMD_MAX, > NETDEV_CMD_MAX = (__NETDEV_CMD_MAX - 1) > -- > 2.34.1 >
On Thu, 10 Oct 2024 06:24:54 +0200 Eric Dumazet wrote: > > +static const struct netlink_range_validation netdev_a_napi_defer_hard_irqs_range = { > > + .max = 2147483647ULL, > > Would (u64)INT_MAX work ? I sent a codegen change for this. The codegen is a bit of a mess. > > +int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info) > > +{ > > + struct napi_struct *napi; > > + unsigned int napi_id; > > + int err; > > + > > + if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID)) > > + return -EINVAL; > > + > > + napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]); > > + > > + rtnl_lock(); > > Hmm.... please see my patch there : > > https://patchwork.kernel.org/project/netdevbpf/patch/20241009232728.107604-2-edumazet@google.com/ > > Lets not add another rtnl_lock() :/ It's not as easy since NAPIs can come and go at driver's whim. I'm quietly hoping we can convert all netdev-nl NAPI accesses to use the netdev->lock protection I strong-armed Paolo into adding in his shaper series. But perhaps we can do that after this series? NAPI GET already takes RTNL lock.
On Thu, Oct 10, 2024 at 5:19 PM Jakub Kicinski <kuba@kernel.org> wrote: > > On Thu, 10 Oct 2024 06:24:54 +0200 Eric Dumazet wrote: > > > +static const struct netlink_range_validation netdev_a_napi_defer_hard_irqs_range = { > > > + .max = 2147483647ULL, > > > > Would (u64)INT_MAX work ? > > I sent a codegen change for this. The codegen is a bit of a mess. > > > > +int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info) > > > +{ > > > + struct napi_struct *napi; > > > + unsigned int napi_id; > > > + int err; > > > + > > > + if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID)) > > > + return -EINVAL; > > > + > > > + napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]); > > > + > > > + rtnl_lock(); > > > > Hmm.... please see my patch there : > > > > https://patchwork.kernel.org/project/netdevbpf/patch/20241009232728.107604-2-edumazet@google.com/ > > > > Lets not add another rtnl_lock() :/ > > It's not as easy since NAPIs can come and go at driver's whim. > I'm quietly hoping we can convert all netdev-nl NAPI accesses > to use the netdev->lock protection I strong-armed Paolo into > adding in his shaper series. But perhaps we can do that after > this series? NAPI GET already takes RTNL lock. napi_by_id() is protected by rcu and its own spinlock ( napi_hash_lock ) I do not see why rtnl is needed. This will also be a big issue with per netns-RTNL anyway.
On Thu, Oct 10, 2024 at 05:30:26PM +0200, Eric Dumazet wrote: > On Thu, Oct 10, 2024 at 5:19 PM Jakub Kicinski <kuba@kernel.org> wrote: > > > > On Thu, 10 Oct 2024 06:24:54 +0200 Eric Dumazet wrote: > > > > +static const struct netlink_range_validation netdev_a_napi_defer_hard_irqs_range = { > > > > + .max = 2147483647ULL, > > > > > > Would (u64)INT_MAX work ? > > > > I sent a codegen change for this. The codegen is a bit of a mess. > > > > > > +int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info) > > > > +{ > > > > + struct napi_struct *napi; > > > > + unsigned int napi_id; > > > > + int err; > > > > + > > > > + if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID)) > > > > + return -EINVAL; > > > > + > > > > + napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]); > > > > + > > > > + rtnl_lock(); > > > > > > Hmm.... please see my patch there : > > > > > > https://patchwork.kernel.org/project/netdevbpf/patch/20241009232728.107604-2-edumazet@google.com/ > > > > > > Lets not add another rtnl_lock() :/ > > > > It's not as easy since NAPIs can come and go at driver's whim. > > I'm quietly hoping we can convert all netdev-nl NAPI accesses > > to use the netdev->lock protection I strong-armed Paolo into > > adding in his shaper series. But perhaps we can do that after > > this series? NAPI GET already takes RTNL lock. > > > napi_by_id() is protected by rcu and its own spinlock ( napi_hash_lock ) > I do not see why rtnl is needed. > This will also be a big issue with per netns-RTNL anyway. I deeply appreciate and respect both of your thoughts on this; I will hold off on sending a v6 until a decision is made on this particular issue. Thank you both for your careful review and analysis.
On Thu, Oct 10, 2024 at 6:40 PM Joe Damato <jdamato@fastly.com> wrote: > > On Thu, Oct 10, 2024 at 05:30:26PM +0200, Eric Dumazet wrote: > > On Thu, Oct 10, 2024 at 5:19 PM Jakub Kicinski <kuba@kernel.org> wrote: > > > > > > On Thu, 10 Oct 2024 06:24:54 +0200 Eric Dumazet wrote: > > > > > +static const struct netlink_range_validation netdev_a_napi_defer_hard_irqs_range = { > > > > > + .max = 2147483647ULL, > > > > > > > > Would (u64)INT_MAX work ? > > > > > > I sent a codegen change for this. The codegen is a bit of a mess. > > > > > > > > +int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info) > > > > > +{ > > > > > + struct napi_struct *napi; > > > > > + unsigned int napi_id; > > > > > + int err; > > > > > + > > > > > + if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID)) > > > > > + return -EINVAL; > > > > > + > > > > > + napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]); > > > > > + > > > > > + rtnl_lock(); > > > > > > > > Hmm.... please see my patch there : > > > > > > > > https://patchwork.kernel.org/project/netdevbpf/patch/20241009232728.107604-2-edumazet@google.com/ > > > > > > > > Lets not add another rtnl_lock() :/ > > > > > > It's not as easy since NAPIs can come and go at driver's whim. > > > I'm quietly hoping we can convert all netdev-nl NAPI accesses > > > to use the netdev->lock protection I strong-armed Paolo into > > > adding in his shaper series. But perhaps we can do that after > > > this series? NAPI GET already takes RTNL lock. > > > > > > napi_by_id() is protected by rcu and its own spinlock ( napi_hash_lock ) > > I do not see why rtnl is needed. > > This will also be a big issue with per netns-RTNL anyway. > > I deeply appreciate and respect both of your thoughts on this; I > will hold off on sending a v6 until a decision is made on this > particular issue. > I do not want to block your series. Whatever is needed later, I can handle.
On Fri, Oct 11, 2024 at 07:19:47PM +0200, Eric Dumazet wrote: > On Thu, Oct 10, 2024 at 6:40 PM Joe Damato <jdamato@fastly.com> wrote: > > > > On Thu, Oct 10, 2024 at 05:30:26PM +0200, Eric Dumazet wrote: > > > On Thu, Oct 10, 2024 at 5:19 PM Jakub Kicinski <kuba@kernel.org> wrote: > > > > > > > > On Thu, 10 Oct 2024 06:24:54 +0200 Eric Dumazet wrote: > > > > > > +static const struct netlink_range_validation netdev_a_napi_defer_hard_irqs_range = { > > > > > > + .max = 2147483647ULL, > > > > > > > > > > Would (u64)INT_MAX work ? > > > > > > > > I sent a codegen change for this. The codegen is a bit of a mess. > > > > > > > > > > +int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info) > > > > > > +{ > > > > > > + struct napi_struct *napi; > > > > > > + unsigned int napi_id; > > > > > > + int err; > > > > > > + > > > > > > + if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID)) > > > > > > + return -EINVAL; > > > > > > + > > > > > > + napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]); > > > > > > + > > > > > > + rtnl_lock(); > > > > > > > > > > Hmm.... please see my patch there : > > > > > > > > > > https://patchwork.kernel.org/project/netdevbpf/patch/20241009232728.107604-2-edumazet@google.com/ > > > > > > > > > > Lets not add another rtnl_lock() :/ > > > > > > > > It's not as easy since NAPIs can come and go at driver's whim. > > > > I'm quietly hoping we can convert all netdev-nl NAPI accesses > > > > to use the netdev->lock protection I strong-armed Paolo into > > > > adding in his shaper series. But perhaps we can do that after > > > > this series? NAPI GET already takes RTNL lock. > > > > > > > > > napi_by_id() is protected by rcu and its own spinlock ( napi_hash_lock ) > > > I do not see why rtnl is needed. > > > This will also be a big issue with per netns-RTNL anyway. > > > > I deeply appreciate and respect both of your thoughts on this; I > > will hold off on sending a v6 until a decision is made on this > > particular issue. > > > > I do not want to block your series. > > Whatever is needed later, I can handle. Thank you, Eric. I am happy to help with the future changes if needed. Feel free to reach out if you'd like me to assist in any way as I know you have a tremendous amount of work on your plate. I will submit the v6 shortly, after I've rebased and retested.
diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml index bf13613eaa0d..7b4ea5a6e73d 100644 --- a/Documentation/netlink/specs/netdev.yaml +++ b/Documentation/netlink/specs/netdev.yaml @@ -690,6 +690,17 @@ operations: reply: attributes: - id + - + name: napi-set + doc: Set configurable NAPI instance settings. + attribute-set: napi + flags: [ admin-perm ] + do: + request: + attributes: + - id + - defer-hard-irqs + - gro-flush-timeout kernel-family: headers: [ "linux/list.h"] diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h index cacd33359c76..e3ebb49f60d2 100644 --- a/include/uapi/linux/netdev.h +++ b/include/uapi/linux/netdev.h @@ -201,6 +201,7 @@ enum { NETDEV_CMD_NAPI_GET, NETDEV_CMD_QSTATS_GET, NETDEV_CMD_BIND_RX, + NETDEV_CMD_NAPI_SET, __NETDEV_CMD_MAX, NETDEV_CMD_MAX = (__NETDEV_CMD_MAX - 1) diff --git a/net/core/netdev-genl-gen.c b/net/core/netdev-genl-gen.c index b28424ae06d5..e197bd84997c 100644 --- a/net/core/netdev-genl-gen.c +++ b/net/core/netdev-genl-gen.c @@ -22,6 +22,10 @@ static const struct netlink_range_validation netdev_a_page_pool_ifindex_range = .max = 2147483647ULL, }; +static const struct netlink_range_validation netdev_a_napi_defer_hard_irqs_range = { + .max = 2147483647ULL, +}; + /* Common nested types */ const struct nla_policy netdev_page_pool_info_nl_policy[NETDEV_A_PAGE_POOL_IFINDEX + 1] = { [NETDEV_A_PAGE_POOL_ID] = NLA_POLICY_FULL_RANGE(NLA_UINT, &netdev_a_page_pool_id_range), @@ -87,6 +91,13 @@ static const struct nla_policy netdev_bind_rx_nl_policy[NETDEV_A_DMABUF_FD + 1] [NETDEV_A_DMABUF_QUEUES] = NLA_POLICY_NESTED(netdev_queue_id_nl_policy), }; +/* NETDEV_CMD_NAPI_SET - do */ +static const struct nla_policy netdev_napi_set_nl_policy[NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT + 1] = { + [NETDEV_A_NAPI_ID] = { .type = NLA_U32, }, + [NETDEV_A_NAPI_DEFER_HARD_IRQS] = NLA_POLICY_FULL_RANGE(NLA_U32, &netdev_a_napi_defer_hard_irqs_range), + [NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT] = { .type = NLA_UINT, }, +}; + /* Ops table for netdev */ static const struct genl_split_ops netdev_nl_ops[] = { { @@ -171,6 +182,13 @@ static const struct genl_split_ops netdev_nl_ops[] = { .maxattr = NETDEV_A_DMABUF_FD, .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO, }, + { + .cmd = NETDEV_CMD_NAPI_SET, + .doit = netdev_nl_napi_set_doit, + .policy = netdev_napi_set_nl_policy, + .maxattr = NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT, + .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO, + }, }; static const struct genl_multicast_group netdev_nl_mcgrps[] = { diff --git a/net/core/netdev-genl-gen.h b/net/core/netdev-genl-gen.h index 8cda334fd042..e09dd7539ff2 100644 --- a/net/core/netdev-genl-gen.h +++ b/net/core/netdev-genl-gen.h @@ -33,6 +33,7 @@ int netdev_nl_napi_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb); int netdev_nl_qstats_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb); int netdev_nl_bind_rx_doit(struct sk_buff *skb, struct genl_info *info); +int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info); enum { NETDEV_NLGRP_MGMT, diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c index 64e5e4cee60d..59523318d620 100644 --- a/net/core/netdev-genl.c +++ b/net/core/netdev-genl.c @@ -303,6 +303,51 @@ int netdev_nl_napi_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) return err; } +static int +netdev_nl_napi_set_config(struct napi_struct *napi, struct genl_info *info) +{ + u64 gro_flush_timeout = 0; + u32 defer = 0; + + if (info->attrs[NETDEV_A_NAPI_DEFER_HARD_IRQS]) { + defer = nla_get_u32(info->attrs[NETDEV_A_NAPI_DEFER_HARD_IRQS]); + napi_set_defer_hard_irqs(napi, defer); + } + + if (info->attrs[NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT]) { + gro_flush_timeout = nla_get_uint(info->attrs[NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT]); + napi_set_gro_flush_timeout(napi, gro_flush_timeout); + } + + return 0; +} + +int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info) +{ + struct napi_struct *napi; + unsigned int napi_id; + int err; + + if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID)) + return -EINVAL; + + napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]); + + rtnl_lock(); + + napi = napi_by_id(napi_id); + if (napi) { + err = netdev_nl_napi_set_config(napi, info); + } else { + NL_SET_BAD_ATTR(info->extack, info->attrs[NETDEV_A_NAPI_ID]); + err = -ENOENT; + } + + rtnl_unlock(); + + return err; +} + static int netdev_nl_queue_fill_one(struct sk_buff *rsp, struct net_device *netdev, u32 q_idx, u32 q_type, const struct genl_info *info) diff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h index cacd33359c76..e3ebb49f60d2 100644 --- a/tools/include/uapi/linux/netdev.h +++ b/tools/include/uapi/linux/netdev.h @@ -201,6 +201,7 @@ enum { NETDEV_CMD_NAPI_GET, NETDEV_CMD_QSTATS_GET, NETDEV_CMD_BIND_RX, + NETDEV_CMD_NAPI_SET, __NETDEV_CMD_MAX, NETDEV_CMD_MAX = (__NETDEV_CMD_MAX - 1)
Add support to set per-NAPI defer_hard_irqs and gro_flush_timeout. Signed-off-by: Joe Damato <jdamato@fastly.com> --- Documentation/netlink/specs/netdev.yaml | 11 ++++++ include/uapi/linux/netdev.h | 1 + net/core/netdev-genl-gen.c | 18 ++++++++++ net/core/netdev-genl-gen.h | 1 + net/core/netdev-genl.c | 45 +++++++++++++++++++++++++ tools/include/uapi/linux/netdev.h | 1 + 6 files changed, 77 insertions(+)