From: Taehee Yoo <ap420073@gmail•com>
To: davem@davemloft•net, kuba@kernel•org, pabeni@redhat•com,
edumazet@google•com, almasrymina@google•com,
donald.hunter@gmail•com, corbet@lwn•net,
michael.chan@broadcom•com, andrew+netdev@lunn•ch,
hawk@kernel•org, ilias.apalodimas@linaro•org, ast@kernel•org,
daniel@iogearbox•net, john.fastabend@gmail•com, dw@davidwei•uk,
sdf@fomichev•me, asml.silence@gmail•com, brett.creeley@amd•com,
linux-doc@vger•kernel.org, netdev@vger•kernel.org
Cc: kory.maincent@bootlin•com, maxime.chevallier@bootlin•com,
danieller@nvidia•com, hengqi@linux•alibaba.com,
ecree.xilinx@gmail•com, przemyslaw.kitszel@intel•com,
hkallweit1@gmail•com, ahmed.zaki@intel•com,
rrameshbabu@nvidia•com, idosch@nvidia•com, jiri@resnulli•us,
bigeasy@linutronix•de, lorenzo@kernel•org, jdamato@fastly•com,
aleksander.lobakin@intel•com, kaiyuanz@google•com,
willemb@google•com, daniel.zahka@gmail•com, ap420073@gmail•com
Subject: [PATCH net-next v6 8/9] net: disallow setup single buffer XDP when tcp-data-split is enabled.
Date: Wed, 18 Dec 2024 14:45:29 +0000 [thread overview]
Message-ID: <20241218144530.2963326-9-ap420073@gmail.com> (raw)
In-Reply-To: <20241218144530.2963326-1-ap420073@gmail.com>
When a single buffer XDP is attached, NIC should guarantee only single
page packets will be received.
tcp-data-split feature splits packets into header and payload. single
buffer XDP can't handle it properly.
So attaching single buffer XDP should be disallowed when tcp-data-split
is enabled.
Signed-off-by: Taehee Yoo <ap420073@gmail•com>
---
v6:
- Patch added.
net/core/dev.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/net/core/dev.c b/net/core/dev.c
index 6a68db95de76..da4a34bfb675 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -92,6 +92,7 @@
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
+#include <linux/ethtool_netlink.h>
#include <linux/skbuff.h>
#include <linux/kthread.h>
#include <linux/bpf.h>
@@ -9498,6 +9499,15 @@ int dev_xdp_propagate(struct net_device *dev, struct netdev_bpf *bpf)
if (!dev->netdev_ops->ndo_bpf)
return -EOPNOTSUPP;
+ if (dev->ethtool->hds_config == ETHTOOL_TCP_DATA_SPLIT_ENABLED &&
+ (bpf->command == XDP_SETUP_PROG ||
+ bpf->command == XDP_SETUP_PROG_HW) &&
+ bpf->prog && !bpf->prog->aux->xdp_has_frags) {
+ NL_SET_ERR_MSG(bpf->extack,
+ "unable to propagate XDP to device using tcp-data-split");
+ return -EBUSY;
+ }
+
if (dev_get_min_mp_channel_count(dev)) {
NL_SET_ERR_MSG(bpf->extack, "unable to propagate XDP to device using memory provider");
return -EBUSY;
@@ -9535,6 +9545,12 @@ static int dev_xdp_install(struct net_device *dev, enum bpf_xdp_mode mode,
struct netdev_bpf xdp;
int err;
+ if (dev->ethtool->hds_config == ETHTOOL_TCP_DATA_SPLIT_ENABLED &&
+ prog && !prog->aux->xdp_has_frags) {
+ NL_SET_ERR_MSG(extack, "unable to install XDP to device using tcp-data-split");
+ return -EBUSY;
+ }
+
if (dev_get_min_mp_channel_count(dev)) {
NL_SET_ERR_MSG(extack, "unable to install XDP to device using memory provider");
return -EBUSY;
--
2.34.1
next prev parent reply other threads:[~2024-12-18 14:47 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-18 14:45 [PATCH net-next v6 0/9] bnxt_en: implement tcp-data-split and thresh option Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 1/9] bnxt_en: add support for rx-copybreak ethtool command Taehee Yoo
2024-12-19 2:07 ` Jakub Kicinski
2024-12-19 13:24 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 2/9] net: ethtool: add hds_config member in ethtool_netdev_state Taehee Yoo
2024-12-19 2:16 ` Jakub Kicinski
2024-12-18 14:45 ` [PATCH net-next v6 3/9] bnxt_en: add support for tcp-data-split ethtool command Taehee Yoo
2024-12-19 2:25 ` Jakub Kicinski
2024-12-19 2:41 ` Jakub Kicinski
2024-12-19 14:05 ` Taehee Yoo
2024-12-19 14:29 ` Jakub Kicinski
2024-12-19 15:14 ` Taehee Yoo
2024-12-19 15:25 ` Jakub Kicinski
2024-12-19 19:33 ` Andy Gospodarek
2024-12-19 20:18 ` Jakub Kicinski
2024-12-19 23:41 ` Michael Chan
2024-12-20 2:08 ` Jakub Kicinski
2024-12-18 14:45 ` [PATCH net-next v6 4/9] net: ethtool: add support for configuring hds-thresh Taehee Yoo
2024-12-19 2:35 ` Jakub Kicinski
2024-12-19 14:10 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 5/9] bnxt_en: add support for hds-thresh ethtool command Taehee Yoo
2024-12-19 2:40 ` Jakub Kicinski
2024-12-19 14:12 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 6/9] net: devmem: add ring parameter filtering Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 7/9] net: ethtool: " Taehee Yoo
2024-12-18 14:45 ` Taehee Yoo [this message]
2024-12-19 2:44 ` [PATCH net-next v6 8/9] net: disallow setup single buffer XDP when tcp-data-split is enabled Jakub Kicinski
2024-12-19 14:14 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 9/9] netdevsim: add HDS feature Taehee Yoo
2024-12-19 2:49 ` Jakub Kicinski
2024-12-19 14:37 ` Taehee Yoo
2024-12-19 14:45 ` Jakub Kicinski
2024-12-19 15:19 ` Taehee Yoo
2024-12-19 15:28 ` Jakub Kicinski
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