tools lib bpf: Use IS_ERR() reporting macros with bpf_map__get_private()
authorArnaldo Carvalho de Melo <acme@redhat.com>
Thu, 2 Jun 2016 13:51:59 +0000 (10:51 -0300)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Mon, 6 Jun 2016 21:18:30 +0000 (18:18 -0300)
commitb4cbfa5670414a567a8a3b368047538f522eff6a
treef76a09d058aefe3c5c7ebbf1c1560e5813d1b474
parent7db91f251056f90fec4121f028680ab3153a0f3c
tools lib bpf: Use IS_ERR() reporting macros with bpf_map__get_private()

To try to, over time, consistently use the IS_ERR() interface instead of
using two return values, i.e. the integer return value for an error and
the pointer address to return the bpf_map->priv pointer.

Also rename it to bpf__priv(), to leave the "get" term for reference
counting.

Noticed while working on using BPF for collecting non-integer syscall
argument payloads (struct sockaddr in calls such as connect(), for
instance), where we need to use BPF maps and thus generalise
bpf__setup_stdout() to connect bpf_output events with maps in a bpf
proggie.

Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/n/tip-saypxyd6ptrct379jqgxx4bl@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/lib/bpf/libbpf.c
tools/lib/bpf/libbpf.h
tools/perf/util/bpf-loader.c