linux/samples/bpf, branch v5.4

samples/bpf: fix build by setting HAVE_ATTR_TEST to zero

2019-10-31T20:39:15Z

To remove that test_attr__{enabled/open} are used by perf-sys.h, we set HAVE_ATTR_TEST to zero. Signed-off-by: Björn Töpel Tested-by: KP Singh Acked-by: Song Liu Cc: Adrian Hunter Cc: Alexei Starovoitov Cc: Jiri Olsa Cc: Namhyung Kim Cc: bpf@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Daniel Borkmann Link: http://lore.kernel.org/bpf/20191001113307.27796-3-bjorn.topel@gmail.com

samples/bpf: Add a workaround for asm_inline

2019-10-03T15:37:11Z

This was added in commit eb111869301e ("compiler-types.h: add asm_inline definition") and breaks samples/bpf as clang does not support asm __inline. Fixes: eb111869301e ("compiler-types.h: add asm_inline definition") Co-developed-by: Florent Revest Signed-off-by: Florent Revest Signed-off-by: KP Singh Signed-off-by: Daniel Borkmann Acked-by: Song Liu Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20191002191652.11432-1-kpsingh@chromium.org

samples/bpf: Fix build for task_fd_query_user.c

2019-10-03T14:27:03Z

Add missing include for which was removed from perf-sys.h in commit 91854f9a077e ("perf tools: Move everything related to sys_perf_event_open() to perf-sys.h"). Fixes: 91854f9a077e ("perf tools: Move everything related to sys_perf_event_open() to perf-sys.h") Reported-by: KP Singh Reported-by: Florent Revest Signed-off-by: Björn Töpel Signed-off-by: Daniel Borkmann Tested-by: KP Singh Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20191001112249.27341-1-bjorn.topel@gmail.com

samples/bpf: fix xdpsock l2fwd tx for unaligned mode

2019-09-16T07:35:10Z

Preserve the offset of the address of the received descriptor, and include it in the address set for the tx descriptor, so the kernel can correctly locate the start of the packet data. Fixes: 03895e63ff97 ("samples/bpf: add buffer recycling for unaligned chunks to xdpsock") Signed-off-by: Ciara Loftus Signed-off-by: Daniel Borkmann

samples/bpf: use hugepages in xdpsock app

2019-08-30T23:08:27Z

This patch modifies xdpsock to use mmap instead of posix_memalign. With this change, we can use hugepages when running the application in unaligned chunks mode. Using hugepages makes it more likely that we have physically contiguous memory, which supports the unaligned chunk mode better. Signed-off-by: Kevin Laatz Acked-by: Jonathan Lemon Signed-off-by: Daniel Borkmann

samples/bpf: add buffer recycling for unaligned chunks to xdpsock

2019-08-30T23:08:26Z

This patch adds buffer recycling support for unaligned buffers. Since we don't mask the addr to 2k at umem_reg in unaligned mode, we need to make sure we give back the correct (original) addr to the fill queue. We achieve this using the new descriptor format and associated masks. The new format uses the upper 16-bits for the offset and the lower 48-bits for the addr. Since we have a field for the offset, we no longer need to modify the actual address. As such, all we have to do to get back the original address is mask for the lower 48 bits (i.e. strip the offset and we get the address on it's own). Signed-off-by: Kevin Laatz Signed-off-by: Bruce Richardson Acked-by: Jonathan Lemon Signed-off-by: Daniel Borkmann

samples/bpf: add unaligned chunks mode support to xdpsock

2019-08-30T23:08:26Z

This patch adds support for the unaligned chunks mode. The addition of the unaligned chunks option will allow users to run the application with more relaxed chunk placement in the XDP umem. Unaligned chunks mode can be used with the '-u' or '--unaligned' command line options. Signed-off-by: Kevin Laatz Signed-off-by: Ciara Loftus Acked-by: Jonathan Lemon Signed-off-by: Daniel Borkmann

samples: bpf: syscall_nrs: use mmap2 if defined

2019-08-21T12:31:38Z

For arm32 xdp sockets mmap2 is preferred, so use it if it's defined. Declaration of __NR_mmap can be skipped and it breaks build. Signed-off-by: Ivan Khoronzhuk Acked-by: Jonathan Lemon Signed-off-by: Daniel Borkmann

samples/bpf: add use of need_wakeup flag in xdpsock

2019-08-17T21:07:32Z

This commit adds using the need_wakeup flag to the xdpsock sample application. It is turned on by default as we think it is a feature that seems to always produce a performance benefit, if the application has been written taking advantage of it. It can be turned off in the sample app by using the '-m' command line option. The txpush and l2fwd sub applications have also been updated to support poll() with multiple sockets. Signed-off-by: Magnus Karlsson Acked-by: Jonathan Lemon Signed-off-by: Daniel Borkmann

samples/bpf: xdp_fwd explain bpf_fib_lookup return codes

2019-08-09T16:05:03Z

Make it clear that this XDP program depend on the network stack to do the ARP resolution. This is connected with the BPF_FIB_LKUP_RET_NO_NEIGH return code from bpf_fib_lookup(). Another common mistake (seen via XDP-tutorial) is that users don't realize that sysctl net.ipv{4,6}.conf.all.forwarding setting is honored by bpf_fib_lookup. Reported-by: Anton Protopopov Signed-off-by: Jesper Dangaard Brouer Reviewed-by: David Ahern Acked-by: Yonghong Song Reviewed-by: Toke Høiland-Jørgensen Signed-off-by: Daniel Borkmann