From 83c9e13aa39aed5cf9a2f8dd69770b7c35ba1281 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Fri, 1 Dec 2017 15:08:58 -0800 Subject: netdevsim: add software driver for testing offloads To be able to run selftests without any hardware required we need a software model. The model can also serve as an example implementation for those implementing actual HW offloads. The dummy driver have previously been extended to test SR-IOV, but the general consensus seems to be against adding further features to it. Add a new driver for purposes of software modelling only. eBPF and SR-IOV will be added here shortly, others are invited to further extend the driver with their offload models. Signed-off-by: Jakub Kicinski Reviewed-by: Simon Horman Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann --- drivers/net/netdevsim/netdevsim.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 drivers/net/netdevsim/netdevsim.h (limited to 'drivers/net/netdevsim/netdevsim.h') diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h new file mode 100644 index 000000000000..4558c6f11598 --- /dev/null +++ b/drivers/net/netdevsim/netdevsim.h @@ -0,0 +1,26 @@ +/* + * 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 +#include +#include + +#define DRV_NAME "netdevsim" + +struct netdevsim { + u64 tx_packets; + u64 tx_bytes; + struct u64_stats_sync syncp; +}; -- cgit v1.2.3 From 31d3ad832948c75139b0e5b653912f7898a1d5d5 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Fri, 1 Dec 2017 15:08:59 -0800 Subject: netdevsim: add bpf offload support Add support for loading programs for netdevsim devices and expose the related information via DebugFS. Both offload of XDP and cls_bpf programs is supported. Signed-off-by: Jakub Kicinski Reviewed-by: Simon Horman Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann --- drivers/net/netdevsim/netdevsim.h | 40 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) (limited to 'drivers/net/netdevsim/netdevsim.h') diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index 4558c6f11598..8779e6a8f885 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -14,13 +14,53 @@ */ #include +#include #include #include #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 netdevsim { + struct net_device *netdev; + u64 tx_packets; u64 tx_bytes; struct u64_stats_sync syncp; + + struct dentry *ddir; + + 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); -- cgit v1.2.3 From 79579220566cd33fe3b15ce8249c57e10251b258 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Fri, 1 Dec 2017 15:09:01 -0800 Subject: netdevsim: add SR-IOV functionality dummy driver was extended with VF-related netdev APIs for testing SR-IOV-related software. netdevsim did not exist back then. Implement SR-IOV functionality in netdevsim. Notable difference is that since netdevsim has no module parameters, we will actually create a device with sriov_numvfs attribute for each netdev. The zero MAC address is accepted as some HW use it to mean any address is allowed. Link state is also now validated. Signed-off-by: Jakub Kicinski Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann --- drivers/net/netdevsim/netdevsim.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/net/netdevsim/netdevsim.h') diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index 8779e6a8f885..32270de9395a 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -13,6 +13,7 @@ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. */ +#include #include #include #include @@ -26,6 +27,7 @@ struct bpf_prog; struct dentry; +struct nsim_vf_config; struct netdevsim { struct net_device *netdev; @@ -34,8 +36,13 @@ struct netdevsim { 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; @@ -64,3 +71,8 @@ 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); +} -- cgit v1.2.3