On 06/07/2019 06:37 PM, Hechao Li wrote:
> Getting number of possible CPUs is commonly used for per-CPU BPF maps
> and perf_event_maps. Add a new API libbpf_num_possible_cpus() that
> helps user with per-CPU related operations and remove duplicate
> implementations in bpftool and selftests.
>
> v4: Fixed error code when reading 0 bytes from possible CPU file
>
> Hechao Li (2):
> bpf: add a new API libbpf_num_possible_cpus()
> bpf: use libbpf_num_possible_cpus in bpftool and selftests
>
> tools/bpf/bpftool/common.c | 53 +++---------------------
> tools/lib/bpf/libbpf.c | 57 ++++++++++++++++++++++++++
> tools/lib/bpf/libbpf.h | 16 ++++++++
> tools/lib/bpf/libbpf.map | 1 +
> tools/testing/selftests/bpf/bpf_util.h | 37 +++--------------
> 5 files changed, 84 insertions(+), 80 deletions(-)
> Series applied, thanks!
> P.s.: Please retain full history (v1->v2->v3->v4) in cover letter next time as
> that is typical convention and helps readers of git log to follow what has
> been
> changed over time.
Hello!
I'm getting the following errors on an attempt to build bpf tests.
Reverting the last patch fixes it.
Please, take a look.
Thank you!
clang -I. -I./include/uapi -I../../../include/uapi -idirafter
/usr/local/include -idirafter /opt/fb/devtoolset/bin/../lib/clang/4.0.0/include
-idirafter /usr/include -Wno-compare-distinct-pointer-types \
-O2 -target bpf -emit-llvm -c progs/sockmap_parse_prog.c -o - | \
llc -march=bpf -mcpu=generic -filetype=obj -o
/data/users/guro/linux/tools/testing/selftests/bpf/sockmap_parse_prog.o
In file included from progs/sockmap_parse_prog.c:3:
./bpf_util.h:9:10: fatal error: 'libbpf.h' file not found
#include <libbpf.h>
^~~~~~~~~~
1 error generated.
...
clang -I. -I./include/uapi -I../../../include/uapi -idirafter
/usr/local/include -idirafter /opt/fb/devtoolset/bin/../lib/clang/4.0.0/include
-idirafter /usr/include -Wno-compare-distinct-pointer-types \
-O2 -target bpf -emit-llvm -c progs/test_sysctl_prog.c -o - | \
llc -march=bpf -mcpu=generic -filetype=obj -o
/data/users/guro/linux/tools/testing/selftests/bpf/test_sysctl_prog.o
In file included from progs/test_sysctl_prog.c:11:
./bpf_util.h:9:10: fatal error: 'libbpf.h' file not found
#include <libbpf.h>
^~~~~~~~~~
1 error generated.
clang -I. -I./include/uapi -I../../../include/uapi -idirafter
/usr/local/include -idirafter /opt/fb/devtoolset/bin/../lib/clang/4.0.0/include
-idirafter /usr/include -Wno-compare-distinct-pointer-types \
-O2 -target bpf -emit-llvm -c progs/sockmap_verdict_prog.c -o - |
\
llc -march=bpf -mcpu=generic -filetype=obj -o
/data/users/guro/linux/tools/testing/selftests/bpf/sockmap_verdict_prog.o
In file included from progs/sockmap_verdict_prog.c:3:
./bpf_util.h:9:10: fatal error: 'libbpf.h' file not found
#include <libbpf.h>
^~~~~~~~~~
1 error generated.
...
clang -I. -I./include/uapi -I../../../include/uapi -idirafter
/usr/local/include -idirafter /opt/fb/devtoolset/bin/../lib/clang/4.0.0/include
-idirafter /usr/include -Wno-compare-distinct-pointer-types \
-O2 -target bpf -emit-llvm -c progs/sockmap_tcp_msg_prog.c -o - |
\
llc -march=bpf -mcpu=generic -filetype=obj -o
/data/users/guro/linux/tools/testing/selftests/bpf/sockmap_tcp_msg_prog.o
In file included from progs/sockmap_tcp_msg_prog.c:3:
./bpf_util.h:9:10: fatal error: 'libbpf.h' file not found
#include <libbpf.h>
^~~~~~~~~~
1 error generated.
