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-rw-r--r--MAINTAINERS5
-rw-r--r--drivers/net/Kconfig11
-rw-r--r--drivers/net/Makefile1
-rw-r--r--drivers/net/dummy.c215
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.c2
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/en_main.c3
-rw-r--r--drivers/net/ethernet/netronome/nfp/bpf/main.c7
-rw-r--r--drivers/net/ethernet/netronome/nfp/nfp_net_common.c4
-rw-r--r--drivers/net/ethernet/qlogic/qede/qede_main.c4
-rw-r--r--drivers/net/netdevsim/Makefile7
-rw-r--r--drivers/net/netdevsim/bpf.c373
-rw-r--r--drivers/net/netdevsim/netdev.c502
-rw-r--r--drivers/net/netdevsim/netdevsim.h78
-rw-r--r--drivers/net/tun.c4
-rw-r--r--include/linux/netdevice.h5
-rw-r--r--net/core/dev.c53
-rw-r--r--net/core/rtnetlink.c6
-rw-r--r--tools/testing/selftests/bpf/Makefile5
-rw-r--r--tools/testing/selftests/bpf/sample_ret0.c7
-rwxr-xr-xtools/testing/selftests/bpf/test_offload.py681
20 files changed, 1715 insertions, 258 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 77d819b458a9..010e46a38373 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9599,6 +9599,11 @@ NETWORKING [WIRELESS]
L: linux-wireless@vger.kernel.org
Q: http://patchwork.kernel.org/project/linux-wireless/list/
+NETDEVSIM
+M: Jakub Kicinski <jakub.kicinski@netronome.com>
+S: Maintained
+F: drivers/net/netdevsim/*
+
NETXEN (1/10) GbE SUPPORT
M: Manish Chopra <manish.chopra@cavium.com>
M: Rahul Verma <rahul.verma@cavium.com>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 0936da592e12..944ec3c9282c 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -497,4 +497,15 @@ config THUNDERBOLT_NET
source "drivers/net/hyperv/Kconfig"
+config NETDEVSIM
+ tristate "Simulated networking device"
+ depends on DEBUG_FS
+ help
+ This driver is a developer testing tool and software model that can
+ be used to test various control path networking APIs, especially
+ HW-offload related.
+
+ To compile this driver as a module, choose M here: the module
+ will be called netdevsim.
+
endif # NETDEVICES
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 766f62d02a0b..04c3b747812c 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -78,3 +78,4 @@ obj-$(CONFIG_FUJITSU_ES) += fjes/
thunderbolt-net-y += thunderbolt.o
obj-$(CONFIG_THUNDERBOLT_NET) += thunderbolt-net.o
+obj-$(CONFIG_NETDEVSIM) += netdevsim/
diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c
index 58483af80bdb..30b1c8512049 100644
--- a/drivers/net/dummy.c
+++ b/drivers/net/dummy.c
@@ -42,48 +42,7 @@
#define DRV_NAME "dummy"
#define DRV_VERSION "1.0"
-#undef pr_fmt
-#define pr_fmt(fmt) DRV_NAME ": " fmt
-
static int numdummies = 1;
-static int num_vfs;
-
-struct vf_data_storage {
- u8 vf_mac[ETH_ALEN];
- u16 pf_vlan; /* When set, guest VLAN config not allowed. */
- u16 pf_qos;
- __be16 vlan_proto;
- u16 min_tx_rate;
- u16 max_tx_rate;
- u8 spoofchk_enabled;
- bool rss_query_enabled;
- u8 trusted;
- int link_state;
-};
-
-struct dummy_priv {
- struct vf_data_storage *vfinfo;
-};
-
-static int dummy_num_vf(struct device *dev)
-{
- return num_vfs;
-}
-
-static struct bus_type dummy_bus = {
- .name = "dummy",
- .num_vf = dummy_num_vf,
-};
-
-static void release_dummy_parent(struct device *dev)
-{
-}
-
-static struct device dummy_parent = {
- .init_name = "dummy",
- .bus = &dummy_bus,
- .release = release_dummy_parent,
-};
/* fake multicast ability */
static void set_multicast_list(struct net_device *dev)
@@ -133,25 +92,10 @@ static netdev_tx_t dummy_xmit(struct sk_buff *skb, struct net_device *dev)
static int dummy_dev_init(struct net_device *dev)
{
- struct dummy_priv *priv = netdev_priv(dev);
-
dev->dstats = netdev_alloc_pcpu_stats(struct pcpu_dstats);
if (!dev->dstats)
return -ENOMEM;
- priv->vfinfo = NULL;
-
- if (!num_vfs)
- return 0;
-
- dev->dev.parent = &dummy_parent;
- priv->vfinfo = kcalloc(num_vfs, sizeof(struct vf_data_storage),
- GFP_KERNEL);
- if (!priv->vfinfo) {
- free_percpu(dev->dstats);
- return -ENOMEM;
- }
-
return 0;
}
@@ -169,117 +113,6 @@ static int dummy_change_carrier(struct net_device *dev, bool new_carrier)
return 0;
}
-static int dummy_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
-{
- struct dummy_priv *priv = netdev_priv(dev);
-
- if (!is_valid_ether_addr(mac) || (vf >= num_vfs))
- return -EINVAL;
-
- memcpy(priv->vfinfo[vf].vf_mac, mac, ETH_ALEN);
-
- return 0;
-}
-
-static int dummy_set_vf_vlan(struct net_device *dev, int vf,
- u16 vlan, u8 qos, __be16 vlan_proto)
-{
- struct dummy_priv *priv = netdev_priv(dev);
-
- if ((vf >= num_vfs) || (vlan > 4095) || (qos > 7))
- return -EINVAL;
-
- priv->vfinfo[vf].pf_vlan = vlan;
- priv->vfinfo[vf].pf_qos = qos;
- priv->vfinfo[vf].vlan_proto = vlan_proto;
-
- return 0;
-}
-
-static int dummy_set_vf_rate(struct net_device *dev, int vf, int min, int max)
-{
- struct dummy_priv *priv = netdev_priv(dev);
-
- if (vf >= num_vfs)
- return -EINVAL;
-
- priv->vfinfo[vf].min_tx_rate = min;
- priv->vfinfo[vf].max_tx_rate = max;
-
- return 0;
-}
-
-static int dummy_set_vf_spoofchk(struct net_device *dev, int vf, bool val)
-{
- struct dummy_priv *priv = netdev_priv(dev);
-
- if (vf >= num_vfs)
- return -EINVAL;
-
- priv->vfinfo[vf].spoofchk_enabled = val;
-
- return 0;
-}
-
-static int dummy_set_vf_rss_query_en(struct net_device *dev, int vf, bool val)
-{
- struct dummy_priv *priv = netdev_priv(dev);
-
- if (vf >= num_vfs)
- return -EINVAL;
-
- priv->vfinfo[vf].rss_query_enabled = val;
-
- return 0;
-}
-
-static int dummy_set_vf_trust(struct net_device *dev, int vf, bool val)
-{
- struct dummy_priv *priv = netdev_priv(dev);
-
- if (vf >= num_vfs)
- return -EINVAL;
-
- priv->vfinfo[vf].trusted = val;
-
- return 0;
-}
-
-static int dummy_get_vf_config(struct net_device *dev,
- int vf, struct ifla_vf_info *ivi)
-{
- struct dummy_priv *priv = netdev_priv(dev);
-
- if (vf >= num_vfs)
- return -EINVAL;
-
- ivi->vf = vf;
- memcpy(&ivi->mac, priv->vfinfo[vf].vf_mac, ETH_ALEN);
- ivi->vlan = priv->vfinfo[vf].pf_vlan;
- ivi->qos = priv->vfinfo[vf].pf_qos;
- ivi->spoofchk = priv->vfinfo[vf].spoofchk_enabled;
- ivi->linkstate = priv->vfinfo[vf].link_state;
- ivi->min_tx_rate = priv->vfinfo[vf].min_tx_rate;
- ivi->max_tx_rate = priv->vfinfo[vf].max_tx_rate;
- ivi->rss_query_en = priv->vfinfo[vf].rss_query_enabled;
- ivi->trusted = priv->vfinfo[vf].trusted;
- ivi->vlan_proto = priv->vfinfo[vf].vlan_proto;
-
- return 0;
-}
-
-static int dummy_set_vf_link_state(struct net_device *dev, int vf, int state)
-{
- struct dummy_priv *priv = netdev_priv(dev);
-
- if (vf >= num_vfs)
- return -EINVAL;
-
- priv->vfinfo[vf].link_state = state;
-
- return 0;
-}
-
static const struct net_device_ops dummy_netdev_ops = {
.ndo_init = dummy_dev_init,
.ndo_uninit = dummy_dev_uninit,
@@ -289,14 +122,6 @@ static const struct net_device_ops dummy_netdev_ops = {
.ndo_set_mac_address = eth_mac_addr,
.ndo_get_stats64 = dummy_get_stats64,
.ndo_change_carrier = dummy_change_carrier,
- .ndo_set_vf_mac = dummy_set_vf_mac,
- .ndo_set_vf_vlan = dummy_set_vf_vlan,
- .ndo_set_vf_rate = dummy_set_vf_rate,
- .ndo_set_vf_spoofchk = dummy_set_vf_spoofchk,
- .ndo_set_vf_trust = dummy_set_vf_trust,
- .ndo_get_vf_config = dummy_get_vf_config,
- .ndo_set_vf_link_state = dummy_set_vf_link_state,
- .ndo_set_vf_rss_query_en = dummy_set_vf_rss_query_en,
};
static void dummy_get_drvinfo(struct net_device *dev,
@@ -323,13 +148,6 @@ static const struct ethtool_ops dummy_ethtool_ops = {
.get_ts_info = dummy_get_ts_info,
};
-static void dummy_free_netdev(struct net_device *dev)
-{
- struct dummy_priv *priv = netdev_priv(dev);
-
- kfree(priv->vfinfo);
-}
-
static void dummy_setup(struct net_device *dev)
{
ether_setup(dev);
@@ -338,7 +156,6 @@ static void dummy_setup(struct net_device *dev)
dev->netdev_ops = &dummy_netdev_ops;
dev->ethtool_ops = &dummy_ethtool_ops;
dev->needs_free_netdev = true;
- dev->priv_destructor = dummy_free_netdev;
/* Fill in device structure with ethernet-generic values. */
dev->flags |= IFF_NOARP;
@@ -370,7 +187,6 @@ static int dummy_validate(struct nlattr *tb[], struct nlattr *data[],
static struct rtnl_link_ops dummy_link_ops __read_mostly = {
.kind = DRV_NAME,
- .priv_size = sizeof(struct dummy_priv),
.setup = dummy_setup,
.validate = dummy_validate,
};
@@ -379,16 +195,12 @@ static struct rtnl_link_ops dummy_link_ops __read_mostly = {
module_param(numdummies, int, 0);
MODULE_PARM_DESC(numdummies, "Number of dummy pseudo devices");
-module_param(num_vfs, int, 0);
-MODULE_PARM_DESC(num_vfs, "Number of dummy VFs per dummy device");
-
static int __init dummy_init_one(void)
{
struct net_device *dev_dummy;
int err;
- dev_dummy = alloc_netdev(sizeof(struct dummy_priv),
- "dummy%d", NET_NAME_ENUM, dummy_setup);
+ dev_dummy = alloc_netdev(0, "dummy%d", NET_NAME_ENUM, dummy_setup);
if (!dev_dummy)
return -ENOMEM;
@@ -407,21 +219,6 @@ static int __init dummy_init_module(void)
{
int i, err = 0;
- if (num_vfs) {
- err = bus_register(&dummy_bus);
- if (err < 0) {
- pr_err("registering dummy bus failed\n");
- return err;
- }
-
- err = device_register(&dummy_parent);
- if (err < 0) {
- pr_err("registering dummy parent device failed\n");
- bus_unregister(&dummy_bus);
- return err;
- }
- }
-
rtnl_lock();
err = __rtnl_link_register(&dummy_link_ops);
if (err < 0)
@@ -437,22 +234,12 @@ static int __init dummy_init_module(void)
out:
rtnl_unlock();
- if (err && num_vfs) {
- device_unregister(&dummy_parent);
- bus_unregister(&dummy_bus);
- }
-
return err;
}
static void __exit dummy_cleanup_module(void)
{
rtnl_link_unregister(&dummy_link_ops);
-
- if (num_vfs) {
- device_unregister(&dummy_parent);
- bus_unregister(&dummy_bus);
- }
}
module_init(dummy_init_module);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index c5c38d4b7d1c..8c1dd60eab6f 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -7800,8 +7800,6 @@ static void bnxt_remove_one(struct pci_dev *pdev)
bnxt_dcb_free(bp);
kfree(bp->edev);
bp->edev = NULL;
- if (bp->xdp_prog)
- bpf_prog_put(bp->xdp_prog);
bnxt_cleanup_pci(bp);
free_netdev(dev);
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index d2b057a3e512..0f5c012de52e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -4308,9 +4308,6 @@ static void mlx5e_nic_cleanup(struct mlx5e_priv *priv)
{
mlx5e_ipsec_cleanup(priv);
mlx5e_vxlan_cleanup(priv);
-
- if (priv->channels.params.xdp_prog)
- bpf_prog_put(priv->channels.params.xdp_prog);
}
static int mlx5e_init_nic_rx(struct mlx5e_priv *priv)
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c
index e379b78e86ef..54bfd7846f6d 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c
@@ -82,12 +82,6 @@ static const char *nfp_bpf_extra_cap(struct nfp_app *app, struct nfp_net *nn)
return nfp_net_ebpf_capable(nn) ? "BPF" : "";
}
-static void nfp_bpf_vnic_free(struct nfp_app *app, struct nfp_net *nn)
-{
- if (nn->dp.bpf_offload_xdp)
- nfp_bpf_xdp_offload(app, nn, NULL);
-}
-
static int nfp_bpf_setup_tc_block_cb(enum tc_setup_type type,
void *type_data, void *cb_priv)
{
@@ -168,7 +162,6 @@ const struct nfp_app_type app_bpf = {
.extra_cap = nfp_bpf_extra_cap,
.vnic_alloc = nfp_app_nic_vnic_alloc,
- .vnic_free = nfp_bpf_vnic_free,
.setup_tc = nfp_bpf_setup_tc,
.tc_busy = nfp_bpf_tc_busy,
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 1a603fdd9e80..ad3e9f6a61e5 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -3392,6 +3392,7 @@ static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
if (nn->dp.bpf_offload_xdp)
xdp->prog_attached = XDP_ATTACHED_HW;
xdp->prog_id = nn->xdp_prog ? nn->xdp_prog->aux->id : 0;
+ xdp->flags = nn->xdp_prog ? nn->xdp_flags : 0;
return 0;
case BPF_OFFLOAD_VERIFIER_PREP:
return nfp_app_bpf_verifier_prep(nn->app, nn, xdp);
@@ -3561,9 +3562,6 @@ struct nfp_net *nfp_net_alloc(struct pci_dev *pdev, bool needs_netdev,
*/
void nfp_net_free(struct nfp_net *nn)
{
- if (nn->xdp_prog)
- bpf_prog_put(nn->xdp_prog);
-
if (nn->dp.netdev)
free_netdev(nn->dp.netdev);
else
diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index 8f9b3eb82137..57332b3e5e64 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -1068,10 +1068,6 @@ static void __qede_remove(struct pci_dev *pdev, enum qede_remove_mode mode)
pci_set_drvdata(pdev, NULL);
- /* Release edev's reference to XDP's bpf if such exist */
- if (edev->xdp_prog)
- bpf_prog_put(edev->xdp_prog);
-
/* Use global ops since we've freed edev */
qed_ops->common->slowpath_stop(cdev);
if (system_state == SYSTEM_POWER_OFF)
diff --git a/drivers/net/netdevsim/Makefile b/drivers/net/netdevsim/Makefile
new file mode 100644
index 000000000000..074ddebbc41d
--- /dev/null
+++ b/drivers/net/netdevsim/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_NETDEVSIM) += netdevsim.o
+
+netdevsim-objs := \
+ netdev.o \
+ bpf.o \
diff --git a/drivers/net/netdevsim/bpf.c b/drivers/net/netdevsim/bpf.c
new file mode 100644
index 000000000000..8e4398a50903
--- /dev/null
+++ b/drivers/net/netdevsim/bpf.c
@@ -0,0 +1,373 @@
+/*
+ * Copyright (C) 2017 Netronome Systems, Inc.
+ *
+ * This software is licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree.
+ *
+ * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
+ * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+ */
+
+#include <linux/bpf.h>
+#include <linux/bpf_verifier.h>
+#include <linux/debugfs.h>
+#include <linux/kernel.h>
+#include <linux/rtnetlink.h>
+#include <net/pkt_cls.h>
+
+#include "netdevsim.h"
+
+struct nsim_bpf_bound_prog {
+ struct netdevsim *ns;
+ struct bpf_prog *prog;
+ struct dentry *ddir;
+ const char *state;
+ bool is_loaded;
+ struct list_head l;
+};
+
+static int nsim_debugfs_bpf_string_read(struct seq_file *file, void *data)
+{
+ const char **str = file->private;
+
+ if (*str)
+ seq_printf(file, "%s\n", *str);
+
+ return 0;
+}
+
+static int nsim_debugfs_bpf_string_open(struct inode *inode, struct file *f)
+{
+ return single_open(f, nsim_debugfs_bpf_string_read, inode->i_private);
+}
+
+static const struct file_operations nsim_bpf_string_fops = {
+ .owner = THIS_MODULE,
+ .open = nsim_debugfs_bpf_string_open,
+ .release = single_release,
+ .read = seq_read,
+ .llseek = seq_lseek
+};
+
+static int
+nsim_bpf_verify_insn(struct bpf_verifier_env *env, int insn_idx, int prev_insn)
+{
+ struct nsim_bpf_bound_prog *state;
+
+ state = env->prog->aux->offload->dev_priv;
+ if (state->ns->bpf_bind_verifier_delay && !insn_idx)
+ msleep(state->ns->bpf_bind_verifier_delay);
+
+ return 0;
+}
+
+static const struct bpf_ext_analyzer_ops nsim_bpf_analyzer_ops = {
+ .insn_hook = nsim_bpf_verify_insn,
+};
+
+static bool nsim_xdp_offload_active(struct netdevsim *ns)
+{
+ return ns->xdp_prog_mode == XDP_ATTACHED_HW;
+}
+
+static void nsim_prog_set_loaded(struct bpf_prog *prog, bool loaded)
+{
+ struct nsim_bpf_bound_prog *state;
+
+ if (!prog || !prog->aux->offload)
+ return;
+
+ state = prog->aux->offload->dev_priv;
+ state->is_loaded = loaded;
+}
+
+static int
+nsim_bpf_offload(struct netdevsim *ns, struct bpf_prog *prog, bool oldprog)
+{
+ nsim_prog_set_loaded(ns->bpf_offloaded, false);
+
+ WARN(!!ns->bpf_offloaded != oldprog,
+ "bad offload state, expected offload %sto be active",
+ oldprog ? "" : "not ");
+ ns->bpf_offloaded = prog;
+ ns->bpf_offloaded_id = prog ? prog->aux->id : 0;
+ nsim_prog_set_loaded(prog, true);
+
+ return 0;
+}
+
+int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
+ void *type_data, void *cb_priv)
+{
+ struct tc_cls_bpf_offload *cls_bpf = type_data;
+ struct bpf_prog *prog = cls_bpf->prog;
+ struct netdevsim *ns = cb_priv;
+ bool skip_sw;
+
+ if (type != TC_SETUP_CLSBPF ||
+ !tc_can_offload(ns->netdev) ||
+ cls_bpf->common.protocol != htons(ETH_P_ALL) ||
+ cls_bpf->common.chain_index)
+ return -EOPNOTSUPP;
+
+ skip_sw = cls_bpf->gen_flags & TCA_CLS_FLAGS_SKIP_SW;
+
+ if (nsim_xdp_offload_active(ns))
+ return -EBUSY;
+
+ if (!ns->bpf_tc_accept)
+ return -EOPNOTSUPP;
+ /* Note: progs without skip_sw will probably not be dev bound */
+ if (prog && !prog->aux->offload && !ns->bpf_tc_non_bound_accept)
+ return -EOPNOTSUPP;
+
+ switch (cls_bpf->command) {
+ case TC_CLSBPF_REPLACE:
+ return nsim_bpf_offload(ns, prog, true);
+ case TC_CLSBPF_ADD:
+ return nsim_bpf_offload(ns, prog, false);
+ case TC_CLSBPF_DESTROY:
+ return nsim_bpf_offload(ns, NULL, true);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+int nsim_bpf_disable_tc(struct netdevsim *ns)
+{
+ if (ns->bpf_offloaded && !nsim_xdp_offload_active(ns))
+ return -EBUSY;
+ return 0;
+}
+
+static int nsim_xdp_offload_prog(struct netdevsim *ns, struct netdev_bpf *bpf)
+{
+ if (!nsim_xdp_offload_active(ns) && !bpf->prog)
+ return 0;
+ if (!nsim_xdp_offload_active(ns) && bpf->prog && ns->bpf_offloaded) {
+ NSIM_EA(bpf->extack, "TC program is already loaded");
+ return -EBUSY;
+ }
+
+ return nsim_bpf_offload(ns, bpf->prog, nsim_xdp_offload_active(ns));
+}
+
+static int nsim_xdp_set_prog(struct netdevsim *ns, struct netdev_bpf *bpf)
+{
+ int err;
+
+ if (ns->xdp_prog && (bpf->flags ^ ns->xdp_flags) & XDP_FLAGS_MODES) {
+ NSIM_EA(bpf->extack, "program loaded with different flags");
+ return -EBUSY;
+ }
+
+ if (bpf->command == XDP_SETUP_PROG && !ns->bpf_xdpdrv_accept) {
+ NSIM_EA(bpf->extack, "driver XDP disabled in DebugFS");
+ return -EOPNOTSUPP;
+ }
+ if (bpf->command == XDP_SETUP_PROG_HW && !ns->bpf_xdpoffload_accept) {
+ NSIM_EA(bpf->extack, "XDP offload disabled in DebugFS");
+ return -EOPNOTSUPP;
+ }
+
+ if (bpf->command == XDP_SETUP_PROG_HW) {
+ err = nsim_xdp_offload_prog(ns, bpf);
+ if (err)
+ return err;
+ }
+
+ if (ns->xdp_prog)
+ bpf_prog_put(ns->xdp_prog);
+
+ ns->xdp_prog = bpf->prog;
+ ns->xdp_flags = bpf->flags;
+
+ if (!bpf->prog)
+ ns->xdp_prog_mode = XDP_ATTACHED_NONE;
+ else if (bpf->command == XDP_SETUP_PROG)
+ ns->xdp_prog_mode = XDP_ATTACHED_DRV;
+ else
+ ns->xdp_prog_mode = XDP_ATTACHED_HW;
+
+ return 0;
+}
+
+int nsim_bpf_create_prog(struct netdevsim *ns, struct bpf_prog *prog)
+{
+ struct nsim_bpf_bound_prog *state;
+ char name[16];
+ int err;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ state->ns = ns;
+ state->prog = prog;
+ state->state = "verify";
+
+ /* Program id is not populated yet when we create the state. */
+ sprintf(name, "%u", ns->prog_id_gen++);
+ state->ddir = debugfs_create_dir(name, ns->ddir_bpf_bound_progs);
+ if (IS_ERR(state->ddir)) {
+ err = PTR_ERR(state->ddir);
+ kfree(state);
+ return err;
+ }
+
+ debugfs_create_u32("id", 0400, state->ddir, &prog->aux->id);
+ debugfs_create_file("state", 0400, state->ddir,
+ &state->state, &nsim_bpf_string_fops);
+ debugfs_create_bool("loaded", 0400, state->ddir, &state->is_loaded);
+
+ list_add_tail(&state->l, &ns->bpf_bound_progs);
+
+ prog->aux->offload->dev_priv = state;
+
+ return 0;
+}
+
+void nsim_bpf_destroy_prog(struct bpf_prog *prog)
+{
+ struct nsim_bpf_bound_prog *state;
+
+ state = prog->aux->offload->dev_priv;
+ WARN(state->is_loaded,
+ "offload state destroyed while program still bound");
+ debugfs_remove_recursive(state->ddir);
+ list_del(&state->l);
+ kfree(state);
+}
+
+static int nsim_setup_prog_checks(struct netdevsim *ns, struct netdev_bpf *bpf)
+{
+ if (bpf->prog && bpf->prog->aux->offload) {
+ NSIM_EA(bpf->extack, "attempt to load offloaded prog to drv");
+ return -EINVAL;
+ }
+ if (ns->netdev->mtu > NSIM_XDP_MAX_MTU) {
+ NSIM_EA(bpf->extack, "MTU too large w/ XDP enabled");
+ return -EINVAL;
+ }
+ if (nsim_xdp_offload_active(ns)) {
+ NSIM_EA(bpf->extack, "xdp offload active, can't load drv prog");
+ return -EBUSY;
+ }
+ return 0;
+}
+
+static int
+nsim_setup_prog_hw_checks(struct netdevsim *ns, struct netdev_bpf *bpf)
+{
+ struct nsim_bpf_bound_prog *state;
+
+ if (!bpf->prog)
+ return 0;
+
+ if (!bpf->prog->aux->offload) {
+ NSIM_EA(bpf->extack, "xdpoffload of non-bound program");
+ return -EINVAL;
+ }
+ if (bpf->prog->aux->offload->netdev != ns->netdev) {
+ NSIM_EA(bpf->extack, "program bound to different dev");
+ return -EINVAL;
+ }
+
+ state = bpf->prog->aux->offload->dev_priv;
+ if (WARN_ON(strcmp(state->state, "xlated"))) {
+ NSIM_EA(bpf->extack, "offloading program in bad state");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+ struct nsim_bpf_bound_prog *state;
+ int err;
+
+ ASSERT_RTNL();
+
+ switch (bpf->command) {
+ case BPF_OFFLOAD_VERIFIER_PREP:
+ if (!ns->bpf_bind_accept)
+ return -EOPNOTSUPP;
+
+ err = nsim_bpf_create_prog(ns, bpf->verifier.prog);
+ if (err)
+ return err;
+
+ bpf->verifier.ops = &nsim_bpf_analyzer_ops;
+ return 0;
+ case BPF_OFFLOAD_TRANSLATE:
+ state = bpf->offload.prog->aux->offload->dev_priv;
+
+ state->state = "xlated";
+ return 0;
+ case BPF_OFFLOAD_DESTROY:
+ nsim_bpf_destroy_prog(bpf->offload.prog);
+ return 0;
+ case XDP_QUERY_PROG:
+ bpf->prog_attached = ns->xdp_prog_mode;
+ bpf->prog_id = ns->xdp_prog ? ns->xdp_prog->aux->id : 0;
+ bpf->prog_flags = ns->xdp_prog ? ns->xdp_flags : 0;
+ return 0;
+ case XDP_SETUP_PROG:
+ err = nsim_setup_prog_checks(ns, bpf);
+ if (err)
+ return err;
+
+ return nsim_xdp_set_prog(ns, bpf);
+ case XDP_SETUP_PROG_HW:
+ err = nsim_setup_prog_hw_checks(ns, bpf);
+ if (err)
+ return err;
+
+ return nsim_xdp_set_prog(ns, bpf);
+ default:
+ return -EINVAL;
+ }
+}
+
+int nsim_bpf_init(struct netdevsim *ns)
+{
+ INIT_LIST_HEAD(&ns->bpf_bound_progs);
+
+ debugfs_create_u32("bpf_offloaded_id", 0400, ns->ddir,
+ &ns->bpf_offloaded_id);
+
+ ns->bpf_bind_accept = true;
+ debugfs_create_bool("bpf_bind_accept", 0600, ns->ddir,
+ &ns->bpf_bind_accept);
+ debugfs_create_u32("bpf_bind_verifier_delay", 0600, ns->ddir,
+ &ns->bpf_bind_verifier_delay);
+ ns->ddir_bpf_bound_progs =
+ debugfs_create_dir("bpf_bound_progs", ns->ddir);
+
+ ns->bpf_tc_accept = true;
+ debugfs_create_bool("bpf_tc_accept", 0600, ns->ddir,
+ &ns->bpf_tc_accept);
+ debugfs_create_bool("bpf_tc_non_bound_accept", 0600, ns->ddir,
+ &ns->bpf_tc_non_bound_accept);
+ ns->bpf_xdpdrv_accept = true;
+ debugfs_create_bool("bpf_xdpdrv_accept", 0600, ns->ddir,
+ &ns->bpf_xdpdrv_accept);
+ ns->bpf_xdpoffload_accept = true;
+ debugfs_create_bool("bpf_xdpoffload_accept", 0600, ns->ddir,
+ &ns->bpf_xdpoffload_accept);
+
+ return 0;
+}
+
+void nsim_bpf_uninit(struct netdevsim *ns)
+{
+ WARN_ON(!list_empty(&ns->bpf_bound_progs));
+ WARN_ON(ns->xdp_prog);
+ WARN_ON(ns->bpf_offloaded);
+}
diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
new file mode 100644
index 000000000000..eb8c679fca9f
--- /dev/null
+++ b/drivers/net/netdevsim/netdev.c
@@ -0,0 +1,502 @@
+/*
+ * Copyright (C) 2017 Netronome Systems, Inc.
+ *
+ * This software is licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree.
+ *
+ * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
+ * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/etherdevice.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <net/netlink.h>
+#include <net/pkt_cls.h>
+#include <net/rtnetlink.h>
+
+#include "netdevsim.h"
+
+struct nsim_vf_config {
+ int link_state;
+ u16 min_tx_rate;
+ u16 max_tx_rate;
+ u16 vlan;
+ __be16 vlan_proto;
+ u16 qos;
+ u8 vf_mac[ETH_ALEN];
+ bool spoofchk_enabled;
+ bool trusted;
+ bool rss_query_enabled;
+};
+
+static u32 nsim_dev_id;
+
+static int nsim_num_vf(struct device *dev)
+{
+ struct netdevsim *ns = to_nsim(dev);
+
+ return ns->num_vfs;
+}
+
+static struct bus_type nsim_bus = {
+ .name = DRV_NAME,
+ .dev_name = DRV_NAME,
+ .num_vf = nsim_num_vf,
+};
+
+static int nsim_vfs_enable(struct netdevsim *ns, unsigned int num_vfs)
+{
+ ns->vfconfigs = kcalloc(num_vfs, sizeof(struct nsim_vf_config),
+ GFP_KERNEL);
+ if (!ns->vfconfigs)
+ return -ENOMEM;
+ ns->num_vfs = num_vfs;
+
+ return 0;
+}
+
+static void nsim_vfs_disable(struct netdevsim *ns)
+{
+ kfree(ns->vfconfigs);
+ ns->vfconfigs = NULL;
+ ns->num_vfs = 0;
+}
+
+static ssize_t
+nsim_numvfs_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct netdevsim *ns = to_nsim(dev);
+ unsigned int num_vfs;
+ int ret;
+
+ ret = kstrtouint(buf, 0, &num_vfs);
+ if (ret)
+ return ret;
+
+ rtnl_lock();
+ if (ns->num_vfs == num_vfs)
+ goto exit_good;
+ if (ns->num_vfs && num_vfs) {
+ ret = -EBUSY;
+ goto exit_unlock;
+ }
+
+ if (num_vfs) {
+ ret = nsim_vfs_enable(ns, num_vfs);
+ if (ret)
+ goto exit_unlock;
+ } else {
+ nsim_vfs_disable(ns);
+ }
+exit_good:
+ ret = count;
+exit_unlock:
+ rtnl_unlock();
+
+ return ret;
+}
+
+static ssize_t
+nsim_numvfs_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct netdevsim *ns = to_nsim(dev);
+
+ return sprintf(buf, "%u\n", ns->num_vfs);
+}
+
+static struct device_attribute nsim_numvfs_attr =
+ __ATTR(sriov_numvfs, 0664, nsim_numvfs_show, nsim_numvfs_store);
+
+static struct attribute *nsim_dev_attrs[] = {
+ &nsim_numvfs_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group nsim_dev_attr_group = {
+ .attrs = nsim_dev_attrs,
+};
+
+static const struct attribute_group *nsim_dev_attr_groups[] = {
+ &nsim_dev_attr_group,
+ NULL,
+};
+
+static void nsim_dev_release(struct device *dev)
+{
+ struct netdevsim *ns = to_nsim(dev);
+
+ nsim_vfs_disable(ns);
+ free_netdev(ns->netdev);
+}
+
+struct device_type nsim_dev_type = {
+ .groups = nsim_dev_attr_groups,
+ .release = nsim_dev_release,
+};
+
+static int nsim_init(struct net_device *dev)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+ int err;
+
+ ns->netdev = dev;
+ ns->ddir = debugfs_create_dir(netdev_name(dev), nsim_ddir);
+
+ err = nsim_bpf_init(ns);
+ if (err)
+ goto err_debugfs_destroy;
+
+ ns->dev.id = nsim_dev_id++;
+ ns->dev.bus = &nsim_bus;
+ ns->dev.type = &nsim_dev_type;
+ err = device_register(&ns->dev);
+ if (err)
+ goto err_bpf_uninit;
+
+ SET_NETDEV_DEV(dev, &ns->dev);
+
+ return 0;
+
+err_bpf_uninit:
+ nsim_bpf_uninit(ns);
+err_debugfs_destroy:
+ debugfs_remove_recursive(ns->ddir);
+ return err;
+}
+
+static void nsim_uninit(struct net_device *dev)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ debugfs_remove_recursive(ns->ddir);
+ nsim_bpf_uninit(ns);
+}
+
+static void nsim_free(struct net_device *dev)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ device_unregister(&ns->dev);
+ /* netdev and vf state will be freed out of device_release() */
+}
+
+static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ u64_stats_update_begin(&ns->syncp);
+ ns->tx_packets++;
+ ns->tx_bytes += skb->len;
+ u64_stats_update_end(&ns->syncp);
+
+ dev_kfree_skb(skb);
+
+ return NETDEV_TX_OK;
+}
+
+static void nsim_set_rx_mode(struct net_device *dev)
+{
+}
+
+static int nsim_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (ns->xdp_prog_mode == XDP_ATTACHED_DRV &&
+ new_mtu > NSIM_XDP_MAX_MTU)
+ return -EBUSY;
+
+ dev->mtu = new_mtu;
+
+ return 0;
+}
+
+static void
+nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+ unsigned int start;
+
+ do {
+ start = u64_stats_fetch_begin(&ns->syncp);
+ stats->tx_bytes = ns->tx_bytes;
+ stats->tx_packets = ns->tx_packets;
+ } while (u64_stats_fetch_retry(&ns->syncp, start));
+}
+
+static int
+nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
+{
+ return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
+}
+
+static int
+nsim_setup_tc_block(struct net_device *dev, struct tc_block_offload *f)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
+ return -EOPNOTSUPP;
+
+ switch (f->command) {
+ case TC_BLOCK_BIND:
+ return tcf_block_cb_register(f->block, nsim_setup_tc_block_cb,
+ ns, ns);
+ case TC_BLOCK_UNBIND:
+ tcf_block_cb_unregister(f->block, nsim_setup_tc_block_cb, ns);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ /* Only refuse multicast addresses, zero address can mean unset/any. */
+ if (vf >= ns->num_vfs || is_multicast_ether_addr(mac))
+ return -EINVAL;
+ memcpy(ns->vfconfigs[vf].vf_mac, mac, ETH_ALEN);
+
+ return 0;
+}
+
+static int nsim_set_vf_vlan(struct net_device *dev, int vf,
+ u16 vlan, u8 qos, __be16 vlan_proto)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (vf >= ns->num_vfs || vlan > 4095 || qos > 7)
+ return -EINVAL;
+
+ ns->vfconfigs[vf].vlan = vlan;
+ ns->vfconfigs[vf].qos = qos;
+ ns->vfconfigs[vf].vlan_proto = vlan_proto;
+
+ return 0;
+}
+
+static int nsim_set_vf_rate(struct net_device *dev, int vf, int min, int max)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (vf >= ns->num_vfs)
+ return -EINVAL;
+
+ ns->vfconfigs[vf].min_tx_rate = min;
+ ns->vfconfigs[vf].max_tx_rate = max;
+
+ return 0;
+}
+
+static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (vf >= ns->num_vfs)
+ return -EINVAL;
+ ns->vfconfigs[vf].spoofchk_enabled = val;
+
+ return 0;
+}
+
+static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (vf >= ns->num_vfs)
+ return -EINVAL;
+ ns->vfconfigs[vf].rss_query_enabled = val;
+
+ return 0;
+}
+
+static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (vf >= ns->num_vfs)
+ return -EINVAL;
+ ns->vfconfigs[vf].trusted = val;
+
+ return 0;
+}
+
+static int
+nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (vf >= ns->num_vfs)
+ return -EINVAL;
+
+ ivi->vf = vf;
+ ivi->linkstate = ns->vfconfigs[vf].link_state;
+ ivi->min_tx_rate = ns->vfconfigs[vf].min_tx_rate;
+ ivi->max_tx_rate = ns->vfconfigs[vf].max_tx_rate;
+ ivi->vlan = ns->vfconfigs[vf].vlan;
+ ivi->vlan_proto = ns->vfconfigs[vf].vlan_proto;
+ ivi->qos = ns->vfconfigs[vf].qos;
+ memcpy(&ivi->mac, ns->vfconfigs[vf].vf_mac, ETH_ALEN);
+ ivi->spoofchk = ns->vfconfigs[vf].spoofchk_enabled;
+ ivi->trusted = ns->vfconfigs[vf].trusted;
+ ivi->rss_query_en = ns->vfconfigs[vf].rss_query_enabled;
+
+ return 0;
+}
+
+static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (vf >= ns->num_vfs)
+ return -EINVAL;
+
+ switch (state) {
+ case IFLA_VF_LINK_STATE_AUTO:
+ case IFLA_VF_LINK_STATE_ENABLE:
+ case IFLA_VF_LINK_STATE_DISABLE:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ns->vfconfigs[vf].link_state = state;
+
+ return 0;
+}
+
+static int
+nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
+{
+ switch (type) {
+ case TC_SETUP_BLOCK:
+ return nsim_setup_tc_block(dev, type_data);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int
+nsim_set_features(struct net_device *dev, netdev_features_t features)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC))
+ return nsim_bpf_disable_tc(ns);
+
+ return 0;
+}
+
+static const struct net_device_ops nsim_netdev_ops = {
+ .ndo_init = nsim_init,
+ .ndo_uninit = nsim_uninit,
+ .ndo_start_xmit = nsim_start_xmit,
+ .ndo_set_rx_mode = nsim_set_rx_mode,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = nsim_change_mtu,
+ .ndo_get_stats64 = nsim_get_stats64,
+ .ndo_set_vf_mac = nsim_set_vf_mac,
+ .ndo_set_vf_vlan = nsim_set_vf_vlan,
+ .ndo_set_vf_rate = nsim_set_vf_rate,
+ .ndo_set_vf_spoofchk = nsim_set_vf_spoofchk,
+ .ndo_set_vf_trust = nsim_set_vf_trust,
+ .ndo_get_vf_config = nsim_get_vf_config,
+ .ndo_set_vf_link_state = nsim_set_vf_link_state,
+ .ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
+ .ndo_setup_tc = nsim_setup_tc,
+ .ndo_set_features = nsim_set_features,
+ .ndo_bpf = nsim_bpf,
+};
+
+static void nsim_setup(struct net_device *dev)
+{
+ ether_setup(dev);
+ eth_hw_addr_random(dev);
+
+ dev->netdev_ops = &nsim_netdev_ops;
+ dev->priv_destructor = nsim_free;
+
+ dev->tx_queue_len = 0;
+ dev->flags |= IFF_NOARP;
+ dev->flags &= ~IFF_MULTICAST;
+ dev->priv_flags |= IFF_LIVE_ADDR_CHANGE |
+ IFF_NO_QUEUE;
+ dev->features |= NETIF_F_HIGHDMA |
+ NETIF_F_SG |
+ NETIF_F_FRAGLIST |
+ NETIF_F_HW_CSUM |
+ NETIF_F_TSO;
+ dev->hw_features |= NETIF_F_HW_TC;
+ dev->max_mtu = ETH_MAX_MTU;
+}
+
+static int nsim_validate(struct nlattr *tb[], struct nlattr *data[],
+ struct netlink_ext_ack *extack)
+{
+ if (tb[IFLA_ADDRESS]) {
+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+ return -EINVAL;
+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+ return -EADDRNOTAVAIL;
+ }
+ return 0;
+}
+
+static struct rtnl_link_ops nsim_link_ops __read_mostly = {
+ .kind = DRV_NAME,
+ .priv_size = sizeof(struct netdevsim),
+ .setup = nsim_setup,
+ .validate = nsim_validate,
+};
+
+struct dentry *nsim_ddir;
+
+static int __init nsim_module_init(void)
+{
+ int err;
+
+ nsim_ddir = debugfs_create_dir(DRV_NAME, NULL);
+ if (IS_ERR(nsim_ddir))
+ return PTR_ERR(nsim_ddir);
+
+ err = bus_register(&nsim_bus);
+ if (err)
+ goto err_debugfs_destroy;
+
+ err = rtnl_link_register(&nsim_link_ops);
+ if (err)
+ goto err_unreg_bus;
+
+ return 0;
+
+err_unreg_bus:
+ bus_unregister(&nsim_bus);
+err_debugfs_destroy:
+ debugfs_remove_recursive(nsim_ddir);
+ return err;
+}
+
+static void __exit nsim_module_exit(void)
+{
+ rtnl_link_unregister(&nsim_link_ops);
+ bus_unregister(&nsim_bus);
+ debugfs_remove_recursive(nsim_ddir);
+}
+
+module_init(nsim_module_init);
+module_exit(nsim_module_exit);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_RTNL_LINK(DRV_NAME);
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
new file mode 100644
index 000000000000..32270de9395a
--- /dev/null
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2017 Netronome Systems, Inc.
+ *
+ * This software is licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree.
+ *
+ * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
+ * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/u64_stats_sync.h>
+
+#define DRV_NAME "netdevsim"
+
+#define NSIM_XDP_MAX_MTU 4000
+
+#define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg)
+
+struct bpf_prog;
+struct dentry;
+struct nsim_vf_config;
+
+struct netdevsim {
+ struct net_device *netdev;
+
+ u64 tx_packets;
+ u64 tx_bytes;
+ struct u64_stats_sync syncp;
+
+ struct device dev;
+
+ struct dentry *ddir;
+
+ unsigned int num_vfs;
+ struct nsim_vf_config *vfconfigs;
+
+ struct bpf_prog *bpf_offloaded;
+ u32 bpf_offloaded_id;
+
+ u32 xdp_flags;
+ int xdp_prog_mode;
+ struct bpf_prog *xdp_prog;
+
+ u32 prog_id_gen;
+
+ bool bpf_bind_accept;
+ u32 bpf_bind_verifier_delay;
+ struct dentry *ddir_bpf_bound_progs;
+ struct list_head bpf_bound_progs;
+
+ bool bpf_tc_accept;
+ bool bpf_tc_non_bound_accept;
+ bool bpf_xdpdrv_accept;
+ bool bpf_xdpoffload_accept;
+};
+
+extern struct dentry *nsim_ddir;
+
+int nsim_bpf_init(struct netdevsim *ns);
+void nsim_bpf_uninit(struct netdevsim *ns);
+int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
+int nsim_bpf_disable_tc(struct netdevsim *ns);
+int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
+ void *type_data, void *cb_priv);
+
+static inline struct netdevsim *to_nsim(struct device *ptr)
+{
+ return container_of(ptr, struct netdevsim, dev);
+}
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 95749006d687..6746e498dc61 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -673,7 +673,6 @@ static void tun_detach(struct tun_file *tfile, bool clean)
static void tun_detach_all(struct net_device *dev)
{
struct tun_struct *tun = netdev_priv(dev);
- struct bpf_prog *xdp_prog = rtnl_dereference(tun->xdp_prog);
struct tun_file *tfile, *tmp;
int i, n = tun->numqueues;
@@ -708,9 +707,6 @@ static void tun_detach_all(struct net_device *dev)
}
BUG_ON(tun->numdisabled != 0);
- if (xdp_prog)
- bpf_prog_put(xdp_prog);
-
if (tun->flags & IFF_PERSIST)
module_put(THIS_MODULE);
}
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index ef789e1d679e..cc4ce7456e38 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -820,6 +820,8 @@ struct netdev_bpf {
struct {
u8 prog_attached;
u32 prog_id;
+ /* flags with which program was installed */
+ u32 prog_flags;
};
/* BPF_OFFLOAD_VERIFIER_PREP */
struct {
@@ -3330,7 +3332,8 @@ struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
int fd, u32 flags);
-u8 __dev_xdp_attached(struct net_device *dev, bpf_op_t xdp_op, u32 *prog_id);
+void __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
+ struct netdev_bpf *xdp);
int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
diff --git a/net/core/dev.c b/net/core/dev.c
index 07ed21d64f92..6bea8931bb62 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -7073,17 +7073,21 @@ int dev_change_proto_down(struct net_device *dev, bool proto_down)
}
EXPORT_SYMBOL(dev_change_proto_down);
-u8 __dev_xdp_attached(struct net_device *dev, bpf_op_t bpf_op, u32 *prog_id)
+void __dev_xdp_query(struct net_device *dev, bpf_op_t bpf_op,
+ struct netdev_bpf *xdp)
{
- struct netdev_bpf xdp;
-
- memset(&xdp, 0, sizeof(xdp));
- xdp.command = XDP_QUERY_PROG;
+ memset(xdp, 0, sizeof(*xdp));
+ xdp->command = XDP_QUERY_PROG;
/* Query must always succeed. */
- WARN_ON(bpf_op(dev, &xdp) < 0);
- if (prog_id)
- *prog_id = xdp.prog_id;
+ WARN_ON(bpf_op(dev, xdp) < 0);
+}
+
+static u8 __dev_xdp_attached(struct net_device *dev, bpf_op_t bpf_op)
+{
+ struct netdev_bpf xdp;
+
+ __dev_xdp_query(dev, bpf_op, &xdp);
return xdp.prog_attached;
}
@@ -7106,6 +7110,27 @@ static int dev_xdp_install(struct net_device *dev, bpf_op_t bpf_op,
return bpf_op(dev, &xdp);
}
+static void dev_xdp_uninstall(struct net_device *dev)
+{
+ struct netdev_bpf xdp;
+ bpf_op_t ndo_bpf;
+
+ /* Remove generic XDP */
+ WARN_ON(dev_xdp_install(dev, generic_xdp_install, NULL, 0, NULL));
+
+ /* Remove from the driver */
+ ndo_bpf = dev->netdev_ops->ndo_bpf;
+ if (!ndo_bpf)
+ return;
+
+ __dev_xdp_query(dev, ndo_bpf, &xdp);
+ if (xdp.prog_attached == XDP_ATTACHED_NONE)
+ return;
+
+ /* Program removal should always succeed */
+ WARN_ON(dev_xdp_install(dev, ndo_bpf, NULL, xdp.prog_flags, NULL));
+}
+
/**
* dev_change_xdp_fd - set or clear a bpf program for a device rx path
* @dev: device
@@ -7134,10 +7159,10 @@ int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
bpf_chk = generic_xdp_install;
if (fd >= 0) {
- if (bpf_chk && __dev_xdp_attached(dev, bpf_chk, NULL))
+ if (bpf_chk && __dev_xdp_attached(dev, bpf_chk))
return -EEXIST;
if ((flags & XDP_FLAGS_UPDATE_IF_NOEXIST) &&
- __dev_xdp_attached(dev, bpf_op, NULL))
+ __dev_xdp_attached(dev, bpf_op))
return -EBUSY;
prog = bpf_prog_get_type_dev(fd, BPF_PROG_TYPE_XDP,
@@ -7236,6 +7261,7 @@ static void rollback_registered_many(struct list_head *head)
/* Shutdown queueing discipline. */
dev_shutdown(dev);
+ dev_xdp_uninstall(dev);
/* Notify protocols, that we are about to destroy
* this device. They should clean all the things.
@@ -8195,7 +8221,6 @@ EXPORT_SYMBOL(alloc_netdev_mqs);
void free_netdev(struct net_device *dev)
{
struct napi_struct *p, *n;
- struct bpf_prog *prog;
might_sleep();
netif_free_tx_queues(dev);
@@ -8214,12 +8239,6 @@ void free_netdev(struct net_device *dev)
free_percpu(dev->pcpu_refcnt);
dev->pcpu_refcnt = NULL;
- prog = rcu_dereference_protected(dev->xdp_prog, 1);
- if (prog) {
- bpf_prog_put(prog);
- static_key_slow_dec(&generic_xdp_needed);
- }
-
/* Compatibility with error handling in drivers */
if (dev->reg_state == NETREG_UNINITIALIZED) {
netdev_freemem(dev);
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index dabba2a91fc8..9c4cb584bfb0 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1261,6 +1261,7 @@ static u8 rtnl_xdp_attached_mode(struct net_device *dev, u32 *prog_id)
{
const struct net_device_ops *ops = dev->netdev_ops;
const struct bpf_prog *generic_xdp_prog;
+ struct netdev_bpf xdp;
ASSERT_RTNL();
@@ -1273,7 +1274,10 @@ static u8 rtnl_xdp_attached_mode(struct net_device *dev, u32 *prog_id)
if (!ops->ndo_bpf)
return XDP_ATTACHED_NONE;
- return __dev_xdp_attached(dev, ops->ndo_bpf, prog_id);
+ __dev_xdp_query(dev, ops->ndo_bpf, &xdp);
+ *prog_id = xdp.prog_id;
+
+ return xdp.prog_attached;
}
static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 333a48655ee0..2c9d8c63c6fa 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -17,9 +17,10 @@ TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test
TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \
test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o \
- sockmap_verdict_prog.o dev_cgroup.o
+ sockmap_verdict_prog.o dev_cgroup.o sample_ret0.o
-TEST_PROGS := test_kmod.sh test_xdp_redirect.sh test_xdp_meta.sh
+TEST_PROGS := test_kmod.sh test_xdp_redirect.sh test_xdp_meta.sh \
+ test_offload.py
include ../lib.mk
diff --git a/tools/testing/selftests/bpf/sample_ret0.c b/tools/testing/selftests/bpf/sample_ret0.c
new file mode 100644
index 000000000000..fec99750d6ea
--- /dev/null
+++ b/tools/testing/selftests/bpf/sample_ret0.c
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
+
+/* Sample program which should always load for testing control paths. */
+int func()
+{
+ return 0;
+}
diff --git a/tools/testing/selftests/bpf/test_offload.py b/tools/testing/selftests/bpf/test_offload.py
new file mode 100755
index 000000000000..3914f7a4585a
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_offload.py
@@ -0,0 +1,681 @@
+#!/usr/bin/python3
+
+# Copyright (C) 2017 Netronome Systems, Inc.
+#
+# This software is licensed under the GNU General License Version 2,
+# June 1991 as shown in the file COPYING in the top-level directory of this
+# source tree.
+#
+# THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
+# WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+# BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
+# OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+# THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+from datetime import datetime
+import argparse
+import json
+import os
+import pprint
+import subprocess
+import time
+
+logfile = None
+log_level = 1
+bpf_test_dir = os.path.dirname(os.path.realpath(__file__))
+pp = pprint.PrettyPrinter()
+devs = [] # devices we created for clean up
+files = [] # files to be removed
+
+def log_get_sec(level=0):
+ return "*" * (log_level + level)
+
+def log_level_inc(add=1):
+ global log_level
+ log_level += add
+
+def log_level_dec(sub=1):
+ global log_level
+ log_level -= sub
+
+def log_level_set(level):
+ global log_level
+ log_level = level
+
+def log(header, data, level=None):
+ """
+ Output to an optional log.
+ """
+ if logfile is None:
+ return
+ if level is not None:
+ log_level_set(level)
+
+ if not isinstance(data, str):
+ data = pp.pformat(data)
+
+ if len(header):
+ logfile.write("\n" + log_get_sec() + " ")
+ logfile.write(header)
+ if len(header) and len(data.strip()):
+ logfile.write("\n")
+ logfile.write(data)
+
+def skip(cond, msg):
+ if not cond:
+ return
+ print("SKIP: " + msg)
+ log("SKIP: " + msg, "", level=1)
+ os.sys.exit(0)
+
+def fail(cond, msg):
+ if not cond:
+ return
+ print("FAIL: " + msg)
+ log("FAIL: " + msg, "", level=1)
+ os.sys.exit(1)
+
+def start_test(msg):
+ log(msg, "", level=1)
+ log_level_inc()
+ print(msg)
+
+def cmd(cmd, shell=True, include_stderr=False, background=False, fail=True):
+ """
+ Run a command in subprocess and return tuple of (retval, stdout);
+ optionally return stderr as well as third value.
+ """
+ proc = subprocess.Popen(cmd, shell=shell, stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ if background:
+ msg = "%s START: %s" % (log_get_sec(1),
+ datetime.now().strftime("%H:%M:%S.%f"))
+ log("BKG " + proc.args, msg)
+ return proc
+
+ return cmd_result(proc, include_stderr=include_stderr, fail=fail)
+
+def cmd_result(proc, include_stderr=False, fail=False):
+ stdout, stderr = proc.communicate()
+ stdout = stdout.decode("utf-8")
+ stderr = stderr.decode("utf-8")
+ proc.stdout.close()
+ proc.stderr.close()
+
+ stderr = "\n" + stderr
+ if stderr[-1] == "\n":
+ stderr = stderr[:-1]
+
+ sec = log_get_sec(1)
+ log("CMD " + proc.args,
+ "RETCODE: %d\n%s STDOUT:\n%s%s STDERR:%s\n%s END: %s" %
+ (proc.returncode, sec, stdout, sec, stderr,
+ sec, datetime.now().strftime("%H:%M:%S.%f")))
+
+ if proc.returncode != 0 and fail:
+ if len(stderr) > 0 and stderr[-1] == "\n":
+ stderr = stderr[:-1]
+ raise Exception("Command failed: %s\n%s" % (proc.args, stderr))
+
+ if include_stderr:
+ return proc.returncode, stdout, stderr
+ else:
+ return proc.returncode, stdout
+
+def rm(f):
+ cmd("rm -f %s" % (f))
+ if f in files:
+ files.remove(f)
+
+def tool(name, args, flags, JSON=True, fail=True):
+ params = ""
+ if JSON:
+ params += "%s " % (flags["json"])
+
+ ret, out = cmd(name + " " + params + args, fail=fail)
+ if JSON and len(out.strip()) != 0:
+ return ret, json.loads(out)
+ else:
+ return ret, out
+
+def bpftool(args, JSON=True, fail=True):
+ return tool("bpftool", args, {"json":"-p"}, JSON=JSON, fail=fail)
+
+def bpftool_prog_list(expected=None):
+ _, progs = bpftool("prog show", JSON=True, fail=True)
+ if expected is not None:
+ if len(progs) != expected:
+ fail(True, "%d BPF programs loaded, expected %d" %
+ (len(progs), expected))
+ return progs
+
+def bpftool_prog_list_wait(expected=0, n_retry=20):
+ for i in range(n_retry):
+ nprogs = len(bpftool_prog_list())
+ if nprogs == expected:
+ return
+ time.sleep(0.05)
+ raise Exception("Time out waiting for program counts to stabilize want %d, have %d" % (expected, nprogs))
+
+def ip(args, force=False, JSON=True, fail=True):
+ if force:
+ args = "-force " + args
+ return tool("ip", args, {"json":"-j"}, JSON=JSON, fail=fail)
+
+def tc(args, JSON=True, fail=True):
+ return tool("tc", args, {"json":"-p"}, JSON=JSON, fail=fail)
+
+def ethtool(dev, opt, args, fail=True):
+ return cmd("ethtool %s %s %s" % (opt, dev["ifname"], args), fail=fail)
+
+def bpf_obj(name, sec=".text", path=bpf_test_dir,):
+ return "obj %s sec %s" % (os.path.join(path, name), sec)
+
+def bpf_pinned(name):
+ return "pinned %s" % (name)
+
+def bpf_bytecode(bytecode):
+ return "bytecode \"%s\"" % (bytecode)
+
+class DebugfsDir:
+ """
+ Class for accessing DebugFS directories as a dictionary.
+ """
+
+ def __init__(self, path):
+ self.path = path
+ self._dict = self._debugfs_dir_read(path)
+
+ def __len__(self):
+ return len(self._dict.keys())
+
+ def __getitem__(self, key):
+ if type(key) is int:
+ key = list(self._dict.keys())[key]
+ return self._dict[key]
+
+ def __setitem__(self, key, value):
+ log("DebugFS set %s = %s" % (key, value), "")
+ log_level_inc()
+
+ cmd("echo '%s' > %s/%s" % (value, self.path, key))
+ log_level_dec()
+
+ _, out = cmd('cat %s/%s' % (self.path, key))
+ self._dict[key] = out.strip()
+
+ def _debugfs_dir_read(self, path):
+ dfs = {}
+
+ log("DebugFS state for %s" % (path), "")
+ log_level_inc(add=2)
+
+ _, out = cmd('ls ' + path)
+ for f in out.split():
+ p = os.path.join(path, f)
+ if os.path.isfile(p):
+ _, out = cmd('cat %s/%s' % (path, f))
+ dfs[f] = out.strip()
+ elif os.path.isdir(p):
+ dfs[f] = DebugfsDir(p)
+ else:
+ raise Exception("%s is neither file nor directory" % (p))
+
+ log_level_dec()
+ log("DebugFS state", dfs)
+ log_level_dec()
+
+ return dfs
+
+class NetdevSim:
+ """
+ Class for netdevsim netdevice and its attributes.
+ """
+
+ def __init__(self):
+ self.dev = self._netdevsim_create()
+ devs.append(self)
+
+ self.dfs_dir = '/sys/kernel/debug/netdevsim/%s' % (self.dev['ifname'])
+ self.dfs_refresh()
+
+ def __getitem__(self, key):
+ return self.dev[key]
+
+ def _netdevsim_create(self):
+ _, old = ip("link show")
+ ip("link add sim%d type netdevsim")
+ _, new = ip("link show")
+
+ for dev in new:
+ f = filter(lambda x: x["ifname"] == dev["ifname"], old)
+ if len(list(f)) == 0:
+ return dev
+
+ raise Exception("failed to create netdevsim device")
+
+ def remove(self):
+ devs.remove(self)
+ ip("link del dev %s" % (self.dev["ifname"]))
+
+ def dfs_refresh(self):
+ self.dfs = DebugfsDir(self.dfs_dir)
+ return self.dfs
+
+ def dfs_num_bound_progs(self):
+ path = os.path.join(self.dfs_dir, "bpf_bound_progs")
+ _, progs = cmd('ls %s' % (path))
+ return len(progs.split())
+
+ def dfs_get_bound_progs(self, expected):
+ progs = DebugfsDir(os.path.join(self.dfs_dir, "bpf_bound_progs"))
+ if expected is not None:
+ if len(progs) != expected:
+ fail(True, "%d BPF programs bound, expected %d" %
+ (len(progs), expected))
+ return progs
+
+ def wait_for_flush(self, bound=0, total=0, n_retry=20):
+ for i in range(n_retry):
+ nbound = self.dfs_num_bound_progs()
+ nprogs = len(bpftool_prog_list())
+ if nbound == bound and nprogs == total:
+ return
+ time.sleep(0.05)
+ raise Exception("Time out waiting for program counts to stabilize want %d/%d, have %d bound, %d loaded" % (bound, total, nbound, nprogs))
+
+ def set_mtu(self, mtu, fail=True):
+ return ip("link set dev %s mtu %d" % (self.dev["ifname"], mtu),
+ fail=fail)
+
+ def set_xdp(self, bpf, mode, force=False, fail=True):
+ return ip("link set dev %s xdp%s %s" % (self.dev["ifname"], mode, bpf),
+ force=force, fail=fail)
+
+ def unset_xdp(self, mode, force=False, fail=True):
+ return ip("link set dev %s xdp%s off" % (self.dev["ifname"], mode),
+ force=force, fail=fail)
+
+ def ip_link_show(self, xdp):
+ _, link = ip("link show dev %s" % (self['ifname']))
+ if len(link) > 1:
+ raise Exception("Multiple objects on ip link show")
+ if len(link) < 1:
+ return {}
+ fail(xdp != "xdp" in link,
+ "XDP program not reporting in iplink (reported %s, expected %s)" %
+ ("xdp" in link, xdp))
+ return link[0]
+
+ def tc_add_ingress(self):
+ tc("qdisc add dev %s ingress" % (self['ifname']))
+
+ def tc_del_ingress(self):
+ tc("qdisc del dev %s ingress" % (self['ifname']))
+
+ def tc_flush_filters(self, bound=0, total=0):
+ self.tc_del_ingress()
+ self.tc_add_ingress()
+ self.wait_for_flush(bound=bound, total=total)
+
+ def tc_show_ingress(self, expected=None):
+ # No JSON support, oh well...
+ flags = ["skip_sw", "skip_hw", "in_hw"]
+ named = ["protocol", "pref", "chain", "handle", "id", "tag"]
+
+ args = "-s filter show dev %s ingress" % (self['ifname'])
+ _, out = tc(args, JSON=False)
+
+ filters = []
+ lines = out.split('\n')
+ for line in lines:
+ words = line.split()
+ if "handle" not in words:
+ continue
+ fltr = {}
+ for flag in flags:
+ fltr[flag] = flag in words
+ for name in named:
+ try:
+ idx = words.index(name)
+ fltr[name] = words[idx + 1]
+ except ValueError:
+ pass
+ filters.append(fltr)
+
+ if expected is not None:
+ fail(len(filters) != expected,
+ "%d ingress filters loaded, expected %d" %
+ (len(filters), expected))
+ return filters
+
+ def cls_bpf_add_filter(self, bpf, da=False, skip_sw=False, skip_hw=False,
+ fail=True):
+ params = ""
+ if da:
+ params += " da"
+ if skip_sw:
+ params += " skip_sw"
+ if skip_hw:
+ params += " skip_hw"
+ return tc("filter add dev %s ingress bpf %s %s" %
+ (self['ifname'], bpf, params), fail=fail)
+
+ def set_ethtool_tc_offloads(self, enable, fail=True):
+ args = "hw-tc-offload %s" % ("on" if enable else "off")
+ return ethtool(self, "-K", args, fail=fail)
+
+################################################################################
+def clean_up():
+ for dev in devs:
+ dev.remove()
+ for f in files:
+ cmd("rm -f %s" % (f))
+
+def pin_prog(file_name, idx=0):
+ progs = bpftool_prog_list(expected=(idx + 1))
+ prog = progs[idx]
+ bpftool("prog pin id %d %s" % (prog["id"], file_name))
+ files.append(file_name)
+
+ return file_name, bpf_pinned(file_name)
+
+# Parse command line
+parser = argparse.ArgumentParser()
+parser.add_argument("--log", help="output verbose log to given file")
+args = parser.parse_args()
+if args.log:
+ logfile = open(args.log, 'w+')
+ logfile.write("# -*-Org-*-")
+
+log("Prepare...", "", level=1)
+log_level_inc()
+
+# Check permissions
+skip(os.getuid() != 0, "test must be run as root")
+
+# Check tools
+ret, progs = bpftool("prog", fail=False)
+skip(ret != 0, "bpftool not installed")
+# Check no BPF programs are loaded
+skip(len(progs) != 0, "BPF programs already loaded on the system")
+
+# Check netdevsim
+ret, out = cmd("modprobe netdevsim", fail=False)
+skip(ret != 0, "netdevsim module could not be loaded")
+
+# Check debugfs
+_, out = cmd("mount")
+if out.find("/sys/kernel/debug type debugfs") == -1:
+ cmd("mount -t debugfs none /sys/kernel/debug")
+
+# Check samples are compiled
+samples = ["sample_ret0.o"]
+for s in samples:
+ ret, out = cmd("ls %s/%s" % (bpf_test_dir, s), fail=False)
+ skip(ret != 0, "sample %s/%s not found, please compile it" %
+ (bpf_test_dir, s))
+
+try:
+ obj = bpf_obj("sample_ret0.o")
+ bytecode = bpf_bytecode("1,6 0 0 4294967295,")
+
+ start_test("Test destruction of generic XDP...")
+ sim = NetdevSim()
+ sim.set_xdp(obj, "generic")
+ sim.remove()
+ bpftool_prog_list_wait(expected=0)
+
+ sim = NetdevSim()
+ sim.tc_add_ingress()
+
+ start_test("Test TC non-offloaded...")
+ ret, _ = sim.cls_bpf_add_filter(obj, skip_hw=True, fail=False)
+ fail(ret != 0, "Software TC filter did not load")
+
+ start_test("Test TC non-offloaded isn't getting bound...")
+ ret, _ = sim.cls_bpf_add_filter(obj, fail=False)
+ fail(ret != 0, "Software TC filter did not load")
+ sim.dfs_get_bound_progs(expected=0)
+
+ sim.tc_flush_filters()
+
+ start_test("Test TC offloads are off by default...")
+ ret, _ = sim.cls_bpf_add_filter(obj, skip_sw=True, fail=False)
+ fail(ret == 0, "TC filter loaded without enabling TC offloads")
+ sim.wait_for_flush()
+
+ sim.set_ethtool_tc_offloads(True)
+ sim.dfs["bpf_tc_non_bound_accept"] = "Y"
+
+ start_test("Test TC offload by default...")
+ ret, _ = sim.cls_bpf_add_filter(obj, fail=False)
+ fail(ret != 0, "Software TC filter did not load")
+ sim.dfs_get_bound_progs(expected=0)
+ ingress = sim.tc_show_ingress(expected=1)
+ fltr = ingress[0]
+ fail(not fltr["in_hw"], "Filter not offloaded by default")
+
+ sim.tc_flush_filters()
+
+ start_test("Test TC cBPF bytcode tries offload by default...")
+ ret, _ = sim.cls_bpf_add_filter(bytecode, fail=False)
+ fail(ret != 0, "Software TC filter did not load")
+ sim.dfs_get_bound_progs(expected=0)
+ ingress = sim.tc_show_ingress(expected=1)
+ fltr = ingress[0]
+ fail(not fltr["in_hw"], "Bytecode not offloaded by default")
+
+ sim.tc_flush_filters()
+ sim.dfs["bpf_tc_non_bound_accept"] = "N"
+
+ start_test("Test TC cBPF unbound bytecode doesn't offload...")
+ ret, _ = sim.cls_bpf_add_filter(bytecode, skip_sw=True, fail=False)
+ fail(ret == 0, "TC bytecode loaded for offload")
+ sim.wait_for_flush()
+
+ start_test("Test TC offloads work...")
+ ret, _ = sim.cls_bpf_add_filter(obj, skip_sw=True, fail=False)
+ fail(ret != 0, "TC filter did not load with TC offloads enabled")
+
+ start_test("Test TC offload basics...")
+ dfs = sim.dfs_get_bound_progs(expected=1)
+ progs = bpftool_prog_list(expected=1)
+ ingress = sim.tc_show_ingress(expected=1)
+
+ dprog = dfs[0]
+ prog = progs[0]
+ fltr = ingress[0]
+ fail(fltr["skip_hw"], "TC does reports 'skip_hw' on offloaded filter")
+ fail(not fltr["in_hw"], "TC does not report 'in_hw' for offloaded filter")
+ fail(not fltr["skip_sw"], "TC does not report 'skip_sw' back")
+
+ start_test("Test TC offload is device-bound...")
+ fail(str(prog["id"]) != fltr["id"], "Program IDs don't match")
+ fail(prog["tag"] != fltr["tag"], "Program tags don't match")
+ fail(fltr["id"] != dprog["id"], "Program IDs don't match")
+ fail(dprog["state"] != "xlated", "Offloaded program state not translated")
+ fail(dprog["loaded"] != "Y", "Offloaded program is not loaded")
+
+ start_test("Test disabling TC offloads is rejected while filters installed...")
+ ret, _ = sim.set_ethtool_tc_offloads(False, fail=False)
+ fail(ret == 0, "Driver should refuse to disable TC offloads with filters installed...")
+
+ start_test("Test qdisc removal frees things...")
+ sim.tc_flush_filters()
+ sim.tc_show_ingress(expected=0)
+
+ start_test("Test disabling TC offloads is OK without filters...")
+ ret, _ = sim.set_ethtool_tc_offloads(False, fail=False)
+ fail(ret != 0,
+ "Driver refused to disable TC offloads without filters installed...")
+
+ sim.set_ethtool_tc_offloads(True)
+
+ start_test("Test destroying device gets rid of TC filters...")
+ sim.cls_bpf_add_filter(obj, skip_sw=True)
+ sim.remove()
+ bpftool_prog_list_wait(expected=0)
+
+ sim = NetdevSim()
+ sim.set_ethtool_tc_offloads(True)
+
+ start_test("Test destroying device gets rid of XDP...")
+ sim.set_xdp(obj, "offload")
+ sim.remove()
+ bpftool_prog_list_wait(expected=0)
+
+ sim = NetdevSim()
+ sim.set_ethtool_tc_offloads(True)
+
+ start_test("Test XDP prog reporting...")
+ sim.set_xdp(obj, "drv")
+ ipl = sim.ip_link_show(xdp=True)
+ progs = bpftool_prog_list(expected=1)
+ fail(ipl["xdp"]["prog"]["id"] != progs[0]["id"],
+ "Loaded program has wrong ID")
+
+ start_test("Test XDP prog replace without force...")
+ ret, _ = sim.set_xdp(obj, "drv", fail=False)
+ fail(ret == 0, "Replaced XDP program without -force")
+ sim.wait_for_flush(total=1)
+
+ start_test("Test XDP prog replace with force...")
+ ret, _ = sim.set_xdp(obj, "drv", force=True, fail=False)
+ fail(ret != 0, "Could not replace XDP program with -force")
+ bpftool_prog_list_wait(expected=1)
+ ipl = sim.ip_link_show(xdp=True)
+ progs = bpftool_prog_list(expected=1)
+ fail(ipl["xdp"]["prog"]["id"] != progs[0]["id"],
+ "Loaded program has wrong ID")
+
+ start_test("Test XDP prog replace with bad flags...")
+ ret, _ = sim.set_xdp(obj, "offload", force=True, fail=False)
+ fail(ret == 0, "Replaced XDP program with a program in different mode")
+ ret, _ = sim.set_xdp(obj, "", force=True, fail=False)
+ fail(ret == 0, "Replaced XDP program with a program in different mode")
+
+ start_test("Test XDP prog remove with bad flags...")
+ ret, _ = sim.unset_xdp("offload", force=True, fail=False)
+ fail(ret == 0, "Removed program with a bad mode mode")
+ ret, _ = sim.unset_xdp("", force=True, fail=False)
+ fail(ret == 0, "Removed program with a bad mode mode")
+
+ start_test("Test MTU restrictions...")
+ ret, _ = sim.set_mtu(9000, fail=False)
+ fail(ret == 0,
+ "Driver should refuse to increase MTU to 9000 with XDP loaded...")
+ sim.unset_xdp("drv")
+ bpftool_prog_list_wait(expected=0)
+ sim.set_mtu(9000)
+ ret, _ = sim.set_xdp(obj, "drv", fail=False)
+ fail(ret == 0, "Driver should refuse to load program with MTU of 9000...")
+ sim.set_mtu(1500)
+
+ sim.wait_for_flush()
+ start_test("Test XDP offload...")
+ sim.set_xdp(obj, "offload")
+ ipl = sim.ip_link_show(xdp=True)
+ link_xdp = ipl["xdp"]["prog"]
+ progs = bpftool_prog_list(expected=1)
+ prog = progs[0]
+ fail(link_xdp["id"] != prog["id"], "Loaded program has wrong ID")
+
+ start_test("Test XDP offload is device bound...")
+ dfs = sim.dfs_get_bound_progs(expected=1)
+ dprog = dfs[0]
+
+ fail(prog["id"] != link_xdp["id"], "Program IDs don't match")
+ fail(prog["tag"] != link_xdp["tag"], "Program tags don't match")
+ fail(str(link_xdp["id"]) != dprog["id"], "Program IDs don't match")
+ fail(dprog["state"] != "xlated", "Offloaded program state not translated")
+ fail(dprog["loaded"] != "Y", "Offloaded program is not loaded")
+
+ start_test("Test removing XDP program many times...")
+ sim.unset_xdp("offload")
+ sim.unset_xdp("offload")
+ sim.unset_xdp("drv")
+ sim.unset_xdp("drv")
+ sim.unset_xdp("")
+ sim.unset_xdp("")
+ bpftool_prog_list_wait(expected=0)
+
+ start_test("Test attempt to use a program for a wrong device...")
+ sim2 = NetdevSim()
+ sim2.set_xdp(obj, "offload")
+ pin_file, pinned = pin_prog("/sys/fs/bpf/tmp")
+
+ ret, _ = sim.set_xdp(pinned, "offload", fail=False)
+ fail(ret == 0, "Pinned program loaded for a different device accepted")
+ sim2.remove()
+ ret, _ = sim.set_xdp(pinned, "offload", fail=False)
+ fail(ret == 0, "Pinned program loaded for a removed device accepted")
+ rm(pin_file)
+ bpftool_prog_list_wait(expected=0)
+
+ start_test("Test mixing of TC and XDP...")
+ sim.tc_add_ingress()
+ sim.set_xdp(obj, "offload")
+ ret, _ = sim.cls_bpf_add_filter(obj, skip_sw=True, fail=False)
+ fail(ret == 0, "Loading TC when XDP active should fail")
+ sim.unset_xdp("offload")
+ sim.wait_for_flush()
+
+ sim.cls_bpf_add_filter(obj, skip_sw=True)
+ ret, _ = sim.set_xdp(obj, "offload", fail=False)
+ fail(ret == 0, "Loading XDP when TC active should fail")
+
+ start_test("Test binding TC from pinned...")
+ pin_file, pinned = pin_prog("/sys/fs/bpf/tmp")
+ sim.tc_flush_filters(bound=1, total=1)
+ sim.cls_bpf_add_filter(pinned, da=True, skip_sw=True)
+ sim.tc_flush_filters(bound=1, total=1)
+
+ start_test("Test binding XDP from pinned...")
+ sim.set_xdp(obj, "offload")
+ pin_file, pinned = pin_prog("/sys/fs/bpf/tmp2", idx=1)
+
+ sim.set_xdp(pinned, "offload", force=True)
+ sim.unset_xdp("offload")
+ sim.set_xdp(pinned, "offload", force=True)
+ sim.unset_xdp("offload")
+
+ start_test("Test offload of wrong type fails...")
+ ret, _ = sim.cls_bpf_add_filter(pinned, da=True, skip_sw=True, fail=False)
+ fail(ret == 0, "Managed to attach XDP program to TC")
+
+ start_test("Test asking for TC offload of two filters...")
+ sim.cls_bpf_add_filter(obj, da=True, skip_sw=True)
+ sim.cls_bpf_add_filter(obj, da=True, skip_sw=True)
+ # The above will trigger a splat until TC cls_bpf drivers are fixed
+
+ sim.tc_flush_filters(bound=2, total=2)
+
+ start_test("Test if netdev removal waits for translation...")
+ delay_msec = 500
+ sim.dfs["bpf_bind_verifier_delay"] = delay_msec
+ start = time.time()
+ cmd_line = "tc filter add dev %s ingress bpf %s da skip_sw" % \
+ (sim['ifname'], obj)
+ tc_proc = cmd(cmd_line, background=True, fail=False)
+ # Wait for the verifier to start
+ while sim.dfs_num_bound_progs() <= 2:
+ pass
+ sim.remove()
+ end = time.time()
+ ret, _ = cmd_result(tc_proc, fail=False)
+ time_diff = end - start
+ log("Time", "start:\t%s\nend:\t%s\ndiff:\t%s" % (start, end, time_diff))
+
+ fail(ret == 0, "Managed to load TC filter on a unregistering device")
+ delay_sec = delay_msec * 0.001
+ fail(time_diff < delay_sec, "Removal process took %s, expected %s" %
+ (time_diff, delay_sec))
+
+ print("%s: OK" % (os.path.basename(__file__)))
+
+finally:
+ log("Clean up...", "", level=1)
+ log_level_inc()
+ clean_up()
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-19 23:01:37 +0000