kernel/tools/include/uapi/linux/bpf.h, branch linux-4.16.y

bpf: add selftest for tcpbpf

2018-01-26T00:41:15Z

Added a selftest for tcpbpf (sock_ops) that checks that the appropriate callbacks occured and that it can access tcp_sock fields and that their values are correct. Run with command: ./test_tcpbpf_user Adding the flag "-d" will show why it did not pass. Signed-off-by: Lawrence Brakmo Acked-by: Alexei Starovoitov Signed-off-by: Alexei Starovoitov

bpf: offload: report device information about offloaded maps

2018-01-18T21:54:25Z

Tell user space about device on which the map was created. Unfortunate reality of user ABI makes sharing this code with program offload difficult but the information is the same. Signed-off-by: Jakub Kicinski Acked-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann

bpf: Sync kernel ABI header with tooling header

2018-01-18T21:17:08Z

Update tools/include/uapi/linux/bpf.h to bring it in sync with include/uapi/linux/bpf.h. The listed commits forgot to update it. Fixes: 02dd3291b2f0 ("bpf: finally expose xdp_rxq_info to XDP bpf-programs") Fixes: f19397a5c656 ("bpf: Add access to snd_cwnd and others in sock_ops") Fixes: 06ef0ccb5a36 ("bpf/cgroup: fix a verification error for a CGROUP_DEVICE type prog") Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Daniel Borkmann

bpf: offload: add map offload infrastructure

2018-01-14T22:36:30Z

BPF map offload follow similar path to program offload. At creation time users may specify ifindex of the device on which they want to create the map. Map will be validated by the kernel's .map_alloc_check callback and device driver will be called for the actual allocation. Map will have an empty set of operations associated with it (save for alloc and free callbacks). The real device callbacks are kept in map->offload->dev_ops because they have slightly different signatures. Map operations are called in process context so the driver may communicate with HW freely, msleep(), wait() etc. Map alloc and free callbacks are muxed via existing .ndo_bpf, and are always called with rtnl lock held. Maps and programs are guaranteed to be destroyed before .ndo_uninit (i.e. before unregister_netdev() returns). Map callbacks are invoked with bpf_devs_lock *read* locked, drivers must take care of exclusive locking if necessary. All offload-specific branches are marked with unlikely() (through bpf_map_is_dev_bound()), given that branch penalty will be negligible compared to IO anyway, and we don't want to penalize SW path unnecessarily. Signed-off-by: Jakub Kicinski Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann

bpf: offload: report device information for offloaded programs

2017-12-31T15:12:23Z

Report to the user ifindex and namespace information of offloaded programs. If device has disappeared return -ENODEV. Specify the namespace using dev/inode combination. CC: Eric W. Biederman Signed-off-by: Jakub Kicinski Signed-off-by: Daniel Borkmann

libbpf: add support for bpf_call

2017-12-17T19:34:35Z

- recognize relocation emitted by llvm - since all regular function will be kept in .text section and llvm takes care of pc-relative offsets in bpf_call instruction simply copy all of .text to relevant program section while adjusting bpf_call instructions in program section to point to newly copied body of instructions from .text - do so for all programs in the elf file - set all programs types to the one passed to bpf_prog_load() Note for elf files with multiple programs that use different functions in .text section we need to do 'linker' style logic. This work is still TBD Signed-off-by: Alexei Starovoitov Acked-by: Daniel Borkmann Signed-off-by: Daniel Borkmann

samples/bpf: add a test for bpf_override_return

2017-12-12T17:02:40Z

This adds a basic test for bpf_override_return to verify it works. We override the main function for mounting a btrfs fs so it'll return -ENOMEM and then make sure that trying to mount a btrfs fs will fail. Acked-by: Alexei Starovoitov Acked-by: Ingo Molnar Signed-off-by: Josef Bacik Signed-off-by: Alexei Starovoitov

bpftool: revert printing program device bound info

2017-11-20T23:37:35Z

This reverts commit 928631e05495 ("bpftool: print program device bound info"). We will remove this API and redo it right in -next. Signed-off-by: Jakub Kicinski Signed-off-by: Daniel Borkmann

bpf: offload: rename the ifindex field

2017-11-20T23:37:35Z

bpf_target_prog seems long and clunky, rename it to prog_ifindex. We don't want to call this field just ifindex, because maps may need a similar field in the future and bpf_attr members for programs and maps are unnamed. Signed-off-by: Jakub Kicinski Reviewed-by: Quentin Monnet Acked-by: Alexei Starovoitov Acked-by: Daniel Borkmann Signed-off-by: Daniel Borkmann

bpf: Revert bpf_overrid_function() helper changes.

2017-11-11T09:24:55Z

NACK'd by x86 maintainer. Signed-off-by: David S. Miller