linux-stable.git/samples/bpf, branch v5.4.13

samples: bpf: fix syscall_tp due to unused syscall

2020-01-12T11:21:26+00:00

[ Upstream commit fe3300897cbfd76c6cb825776e5ac0ca50a91ca4 ]

Currently, open() is called from the user program and it calls the syscall
'sys_openat', not the 'sys_open'. This leads to an error of the program
of user side, due to the fact that the counter maps are zero since no
function such 'sys_open' is called.

This commit adds the kernel bpf program which are attached to the
tracepoint 'sys_enter_openat' and 'sys_enter_openat'.

Fixes: 1da236b6be963 ("bpf: add a test case for syscalls/sys_{enter|exit}_* tracepoints")
Signed-off-by: Daniel T. Lee 
Signed-off-by: Alexei Starovoitov 
Signed-off-by: Sasha Levin

samples: bpf: Replace symbol compare of trace_event

2020-01-12T11:21:26+00:00

[ Upstream commit bba1b2a890253528c45aa66cf856f289a215bfbc ]

Previously, when this sample is added, commit 1c47910ef8013
("samples/bpf: add perf_event+bpf example"), a symbol 'sys_read' and
'sys_write' has been used without no prefixes. But currently there are
no exact symbols with these under kallsyms and this leads to failure.

This commit changes exact compare to substring compare to keep compatible
with exact symbol or prefixed symbol.

Fixes: 1c47910ef8013 ("samples/bpf: add perf_event+bpf example")
Signed-off-by: Daniel T. Lee 
Signed-off-by: Alexei Starovoitov 
Link: https://lore.kernel.org/bpf/20191205080114.19766-2-danieltimlee@gmail.com
Signed-off-by: Sasha Levin

samples/bpf: fix build by setting HAVE_ATTR_TEST to zero

2019-10-31T20:39:15+00:00

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

2019-10-03T15:37:11+00:00

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

2019-10-03T14:27:03+00:00

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

2019-09-16T07:35:10+00:00

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

2019-08-30T23:08:27+00:00

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

2019-08-30T23:08:26+00:00

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

2019-08-30T23:08:26+00:00

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

2019-08-21T12:31:38+00:00

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