packages/kernel
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
kernel/patches/0525-ethtool-set-device-ring-sizes-with-RINGS_SET-request.patch
Xiaodong Li 3f570dd146 NIC feature enhancement
2023-11-17 14:19:46 +08:00

240 lines
8.3 KiB
Diff
Raw Permalink Blame History

From 01034b37673db2bea84b073d5d5f4a4e1c1a2b53 Mon Sep 17 00:00:00 2001
From: Michal Kubecek <mkubecek@suse.cz>
Date: Thu, 12 Mar 2020 21:08:28 +0100
Subject: [PATCH 164/283] ethtool: set device ring sizes with RINGS_SET request
mainline inclusion
from mainline-v5.7-rc1
commit 2fc2929e807211a9535a6541f24b57fa1c469728
category: feature
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I8EN3D
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2fc2929e807211a9535a6541f24b57fa1c469728
--------------------------------
Implement RINGS_SET netlink request to set ring sizes of a network device.
These are traditionally set with ETHTOOL_SRINGPARAM ioctl request.
Like the ioctl implementation, the generic ethtool code checks if supplied
values do not exceed driver defined limits; if they do, first offending
attribute is reported using extack.
v2:
- fix netdev reference leak in error path (found by Jakub Kicinsky)
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Xiaodong Li <lixiaodong67@huawei.com>
Conflicts:
Documentation/networking/ethtool-netlink.rst
---
Documentation/networking/ethtool-netlink.rst | 24 +++++-
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/netlink.c | 5 ++
net/ethtool/netlink.h | 5 ++
net/ethtool/rings.c | 89 ++++++++++++++++++++
5 files changed, 123 insertions(+), 1 deletion(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 32a92edfec14..6ed5a806054a 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -179,6 +179,7 @@ Userspace to kernel:
===================================== ================================
``ETHTOOL_MSG_RINGS_GET`` get ring sizes
+ ``ETHTOOL_MSG_RINGS_SET`` set ring sizes
===================================== ================================
Kernel to userspace:
@@ -242,6 +243,27 @@ Kernel response contents:
``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
==================================== ====== ==========================
+
+RINGS_SET
+=========
+
+Sets ring sizes like ``ETHTOOL_SRINGPARAM`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_RINGS_HEADER`` nested reply header
+ ``ETHTOOL_A_RINGS_RX`` u32 size of RX ring
+ ``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring
+ ``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring
+ ``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
+ ==================================== ====== ==========================
+
+Kernel checks that requested ring sizes do not exceed limits reported by
+driver. Driver may impose additional constraints and may not suspport all
+attributes.
+
+
Request translation
===================
@@ -267,7 +289,7 @@ have their netlink replacement yet.
``ETHTOOL_GCOALESCE`` n/a
``ETHTOOL_SCOALESCE`` n/a
``ETHTOOL_GRINGPARAM`` ``ETHTOOL_MSG_RINGS_GET``
- ``ETHTOOL_SRINGPARAM`` n/a
+ ``ETHTOOL_SRINGPARAM`` ``ETHTOOL_MSG_RINGS_SET``
``ETHTOOL_GPAUSEPARAM`` n/a
``ETHTOOL_SPAUSEPARAM`` n/a
``ETHTOOL_GRXCSUM`` n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 496e1d4805ee..aa543c783529 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -29,6 +29,7 @@ enum {
ETHTOOL_MSG_PRIVFLAGS_GET,
ETHTOOL_MSG_PRIVFLAGS_SET,
ETHTOOL_MSG_RINGS_GET,
+ ETHTOOL_MSG_RINGS_SET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 778bbeb517f5..7ac8a4524376 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -769,6 +769,11 @@ static const struct genl_ops ethtool_genl_ops[] = {
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
},
+ {
+ .cmd = ETHTOOL_MSG_RINGS_SET,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_set_rings,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index c89b1f6254ba..a862bad9dd06 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -10,6 +10,10 @@
struct ethnl_req_info;
+int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
+ const struct nlattr *nest, struct net *net,
+ struct netlink_ext_ack *extack,
+ bool require_dev);
int ethnl_parse_header(struct ethnl_req_info *req_info,
const struct nlattr *nest, struct net *net,
struct netlink_ext_ack *extack, bool require_dev);
@@ -329,5 +333,6 @@ int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_features(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info);
+int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info);
#endif /* _NET_ETHTOOL_NETLINK_H */
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index d3129d8a252d..93f428e9a6c2 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -106,3 +106,92 @@ const struct ethnl_request_ops ethnl_rings_request_ops = {
.reply_size = rings_reply_size,
.fill_reply = rings_fill_reply,
};
+
+/* RINGS_SET */
+
+static const struct nla_policy
+rings_set_policy[ETHTOOL_A_RINGS_MAX + 1] = {
+ [ETHTOOL_A_RINGS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_RINGS_RX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX_MINI_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX_JUMBO_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_TX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 },
+ [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 },
+ [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 },
+ [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 },
+};
+
+int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *tb[ETHTOOL_A_RINGS_MAX + 1];
+ struct ethtool_ringparam ringparam = {};
+ struct ethnl_req_info req_info = {};
+ const struct nlattr *err_attr;
+ const struct ethtool_ops *ops;
+ struct net_device *dev;
+ bool mod = false;
+ int ret;
+
+ ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
+ ETHTOOL_A_RINGS_MAX, rings_set_policy,
+ info->extack);
+ if (ret < 0)
+ return ret;
+ ret = ethnl_parse_header_dev_get(&req_info,
+ tb[ETHTOOL_A_RINGS_HEADER],
+ genl_info_net(info), info->extack,
+ true);
+ if (ret < 0)
+ return ret;
+ dev = req_info.dev;
+ ops = dev->ethtool_ops;
+ ret = -EOPNOTSUPP;
+ if (!ops->get_ringparam || !ops->set_ringparam)
+ goto out_dev;
+
+ rtnl_lock();
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out_rtnl;
+ ops->get_ringparam(dev, &ringparam);
+
+ ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
+ ethnl_update_u32(&ringparam.rx_mini_pending,
+ tb[ETHTOOL_A_RINGS_RX_MINI], &mod);
+ ethnl_update_u32(&ringparam.rx_jumbo_pending,
+ tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod);
+ ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
+ ret = 0;
+ if (!mod)
+ goto out_ops;
+
+ /* ensure new ring parameters are within limits */
+ if (ringparam.rx_pending > ringparam.rx_max_pending)
+ err_attr = tb[ETHTOOL_A_RINGS_RX];
+ else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending)
+ err_attr = tb[ETHTOOL_A_RINGS_RX_MINI];
+ else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending)
+ err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO];
+ else if (ringparam.tx_pending > ringparam.tx_max_pending)
+ err_attr = tb[ETHTOOL_A_RINGS_TX];
+ else
+ err_attr = NULL;
+ if (err_attr) {
+ ret = -EINVAL;
+ NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
+ "requested ring size exceeeds maximum");
+ goto out_ops;
+ }
+
+ ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
+
+out_ops:
+ ethnl_ops_complete(dev);
+out_rtnl:
+ rtnl_unlock();
+out_dev:
+ dev_put(dev);
+ return ret;
+}
--
2.34.1
Reference in New Issue View Git Blame Copy Permalink