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176 lines
6.0 KiB
176 lines
6.0 KiB
From 7ef7c73bc3a271e3e5ccb8b1525c6e9152b99c9a Mon Sep 17 00:00:00 2001
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Message-ID: <7ef7c73bc3a271e3e5ccb8b1525c6e9152b99c9a.1709652372.git.aclaudi@redhat.com>
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In-Reply-To: <d60a7ac3c0f6aa2a933f48a69ab31e3637f6906c.1709652372.git.aclaudi@redhat.com>
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References: <d60a7ac3c0f6aa2a933f48a69ab31e3637f6906c.1709652372.git.aclaudi@redhat.com>
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From: Andrea Claudi <aclaudi@redhat.com>
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Date: Mon, 4 Mar 2024 23:37:51 +0100
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Subject: [PATCH] iplink: add gso and gro max_size attributes for ipv4
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JIRA: https://issues.redhat.com/browse/RHEL-579
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Upstream Status: iproute2.git commit 1dafe448c7a2f2be5dfddd8da250980708a48c41
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commit 1dafe448c7a2f2be5dfddd8da250980708a48c41
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Author: Xin Long <lucien.xin@gmail.com>
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Date: Thu Feb 9 18:44:24 2023 -0500
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iplink: add gso and gro max_size attributes for ipv4
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This patch adds two attributes gso/gro_ipv4_max_size in iplink for the
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user space support of the BIG TCP for IPv4:
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https://lore.kernel.org/netdev/de811bf3-e2d8-f727-72bc-c8a754a9d929@tessares.net/T/
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Note that after this kernel patchset, "gso/gro_max_size" are used for IPv6
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packets while "gso/gro_ipv4_max_size" are for IPv4 patckets. To not break
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these old applications using "gso/gro_ipv4_max_size" for IPv4 GSO packets,
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the new size will also be set on "gso/gro_ipv4_max_size" in kernel when
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"gso/gro_max_size" changes to a value <= 65536.
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Signed-off-by: Xin Long <lucien.xin@gmail.com>
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Signed-off-by: David Ahern <dsahern@kernel.org>
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Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
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---
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ip/ipaddress.c | 12 ++++++++++++
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ip/iplink.c | 22 ++++++++++++++++++++--
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man/man8/ip-link.8.in | 30 +++++++++++++++++++++++++++---
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3 files changed, 59 insertions(+), 5 deletions(-)
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diff --git a/ip/ipaddress.c b/ip/ipaddress.c
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index c7553bcd..9ba81438 100644
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--- a/ip/ipaddress.c
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+++ b/ip/ipaddress.c
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@@ -1264,6 +1264,18 @@ int print_linkinfo(struct nlmsghdr *n, void *arg)
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"gro_max_size %u ",
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rta_getattr_u32(tb[IFLA_GRO_MAX_SIZE]));
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+ if (tb[IFLA_GSO_IPV4_MAX_SIZE])
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+ print_uint(PRINT_ANY,
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+ "gso_ipv4_max_size",
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+ "gso_ipv4_max_size %u ",
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+ rta_getattr_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]));
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+
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+ if (tb[IFLA_GRO_IPV4_MAX_SIZE])
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+ print_uint(PRINT_ANY,
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+ "gro_ipv4_max_size",
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+ "gro_ipv4_max_size %u ",
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+ rta_getattr_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]));
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+
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if (tb[IFLA_PHYS_PORT_NAME])
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print_string(PRINT_ANY,
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"phys_port_name",
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diff --git a/ip/iplink.c b/ip/iplink.c
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index 4ec9e370..a8da52f9 100644
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--- a/ip/iplink.c
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+++ b/ip/iplink.c
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@@ -114,8 +114,8 @@ void iplink_usage(void)
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" [ addrgenmode { eui64 | none | stable_secret | random } ]\n"
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" [ protodown { on | off } ]\n"
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" [ protodown_reason PREASON { on | off } ]\n"
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- " [ gso_max_size BYTES ] | [ gso_max_segs PACKETS ]\n"
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- " [ gro_max_size BYTES ]\n"
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+ " [ gso_max_size BYTES ] [ gso_ipv4_max_size BYTES ] [ gso_max_segs PACKETS ]\n"
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+ " [ gro_max_size BYTES ] [ gro_ipv4_max_size BYTES ]\n"
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"\n"
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" ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n"
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" [nomaster]\n"
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@@ -948,6 +948,24 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req, char **type)
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*argv);
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addattr32(&req->n, sizeof(*req),
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IFLA_GRO_MAX_SIZE, max_size);
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+ } else if (strcmp(*argv, "gso_ipv4_max_size") == 0) {
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+ unsigned int max_size;
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+
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+ NEXT_ARG();
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+ if (get_unsigned(&max_size, *argv, 0))
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+ invarg("Invalid \"gso_ipv4_max_size\" value\n",
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+ *argv);
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+ addattr32(&req->n, sizeof(*req),
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+ IFLA_GSO_IPV4_MAX_SIZE, max_size);
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+ } else if (strcmp(*argv, "gro_ipv4_max_size") == 0) {
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+ unsigned int max_size;
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+
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+ NEXT_ARG();
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+ if (get_unsigned(&max_size, *argv, 0))
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+ invarg("Invalid \"gro_ipv4_max_size\" value\n",
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+ *argv);
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+ addattr32(&req->n, sizeof(*req),
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+ IFLA_GRO_IPV4_MAX_SIZE, max_size);
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} else if (strcmp(*argv, "parentdev") == 0) {
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NEXT_ARG();
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addattr_l(&req->n, sizeof(*req), IFLA_PARENT_DEV_NAME,
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diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in
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index 62aebabd..bec1b78b 100644
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--- a/man/man8/ip-link.8.in
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+++ b/man/man8/ip-link.8.in
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@@ -38,11 +38,16 @@ ip-link \- network device configuration
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.br
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.RB "[ " gso_max_size
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.IR BYTES " ]"
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+.RB "[ " gso_ipv4_max_size
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+.IR BYTES " ]"
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.RB "[ " gso_max_segs
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.IR SEGMENTS " ]"
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.br
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.RB "[ " gro_max_size
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.IR BYTES " ]"
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+.RB "[ " gro_ipv4_max_size
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+.IR BYTES " ]"
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+.br
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.RB "[ " netns " {"
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.IR PID " | " NETNSNAME " } ]"
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.br
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@@ -90,10 +95,15 @@ ip-link \- network device configuration
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.br
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.RB "[ " gso_max_size
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.IR BYTES " ]"
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+.RB "[ " gso_ipv4_max_size
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+.IR BYTES " ]"
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.RB "[ " gso_max_segs
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.IR SEGMENTS " ]"
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+.br
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.RB "[ " gro_max_size
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.IR BYTES " ]"
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+.RB "[ " gro_ipv4_max_size
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+.IR BYTES " ]"
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.br
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.RB "[ " name
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.IR NEWNAME " ]"
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@@ -423,7 +433,14 @@ specifies the number of receive queues for new device.
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.TP
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.BI gso_max_size " BYTES "
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specifies the recommended maximum size of a Generic Segment Offload
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-packet the new device should accept.
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+packet the new device should accept. This is also used to enable BIG
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+TCP for IPv6 on this device when the size is greater than 65536.
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+
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+.TP
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+.BI gso_ipv4_max_size " BYTES "
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+specifies the recommended maximum size of a IPv4 Generic Segment Offload
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+packet the new device should accept. This is especially used to enable
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+BIG TCP for IPv4 on this device by setting to a size greater than 65536.
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.TP
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.BI gso_max_segs " SEGMENTS "
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@@ -432,8 +449,15 @@ segments the new device should accept.
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.TP
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.BI gro_max_size " BYTES "
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-specifies the maximum size of a packet built by GRO stack
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-on this device.
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+specifies the maximum size of a packet built by GRO stack on this
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+device. This is also used for BIG TCP to allow the size of a
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+merged IPv6 GSO packet on this device greater than 65536.
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+
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+.TP
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+.BI gro_ipv4_max_size " BYTES "
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+specifies the maximum size of a IPv4 packet built by GRO stack on this
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+device. This is especially used for BIG TCP to allow the size of a
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+merged IPv4 GSO packet on this device greater than 65536.
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.TP
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.BI index " IDX "
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--
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2.44.0
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