linux-kernel - [PATCH v2 net 1/2] net: openvswitch: allow metering in non-initial user namespace

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Message-Id: <20220921011946.250228-2-michael.weiss@aisec.fraunhofer.de>
Date:   Wed, 21 Sep 2022 03:19:45 +0200
From:   Michael Weiß <michael.weiss@...ec.fraunhofer.de>
To:     Paolo Abeni <pabeni@...hat.com>, Pravin B Shelar <pshelar@....org>,
        "David S . Miller" <davem@...emloft.net>
Cc:     Michael Weiß <michael.weiss@...ec.fraunhofer.de>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        dev@...nvswitch.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 net 1/2] net: openvswitch: allow metering in non-initial user namespace

The Netlink interface for metering was restricted to global CAP_NET_ADMIN
by using GENL_ADMIN_PERM. To allow metring in a non-inital user namespace,
e.g., a container, this is changed to GENL_UNS_ADMIN_PERM.

Signed-off-by: Michael Weiß <michael.weiss@...ec.fraunhofer.de>
---
 net/openvswitch/meter.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/net/openvswitch/meter.c b/net/openvswitch/meter.c
index 04a060ac7fdf..7a56efd3406b 100644
--- a/net/openvswitch/meter.c
+++ b/net/openvswitch/meter.c
@@ -343,7 +343,7 @@ static struct dp_meter *dp_meter_create(struct nlattr **a)
 			return ERR_PTR(-EINVAL);
 
 	/* Allocate and set up the meter before locking anything. */
-	meter = kzalloc(struct_size(meter, bands, n_bands), GFP_KERNEL);
+	meter = kzalloc(struct_size(meter, bands, n_bands), GFP_KERNEL_ACCOUNT);
 	if (!meter)
 		return ERR_PTR(-ENOMEM);
 
@@ -687,9 +687,9 @@ static const struct genl_small_ops dp_meter_genl_ops[] = {
 	},
 	{ .cmd = OVS_METER_CMD_SET,
 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
-		.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN
-					   *  privilege.
-					   */
+		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
+					       *  privilege.
+					       */
 		.doit = ovs_meter_cmd_set,
 	},
 	{ .cmd = OVS_METER_CMD_GET,
@@ -699,9 +699,9 @@ static const struct genl_small_ops dp_meter_genl_ops[] = {
 	},
 	{ .cmd = OVS_METER_CMD_DEL,
 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
-		.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN
-					   *  privilege.
-					   */
+		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
+					       *  privilege.
+					       */
 		.doit = ovs_meter_cmd_del
 	},
 };
-- 
2.30.2