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0e28948730
perf_buffer__new() is relying on BPF_OBJ_GET_INFO_BY_FD availability for few sanity checks. OBJ_GET_INFO for maps is actually much more recent feature than perf_buffer support itself, so this causes unnecessary problems on old kernels before BPF_OBJ_GET_INFO_BY_FD was added. This patch makes those sanity checks optional and just assumes best if command is not supported. If user specified something incorrectly (e.g., wrong map type), kernel will reject it later anyway, except user won't get a nice explanation as to why it failed. This seems like a good trade off for supporting perf_buffer on old kernels. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20200708015318.3827358-6-andriin@fb.com |
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| .. | ||
| api | ||
| bpf | ||
| lockdep | ||
| perf | ||
| subcmd | ||
| symbol | ||
| traceevent | ||
| argv_split.c | ||
| bitmap.c | ||
| ctype.c | ||
| find_bit.c | ||
| hweight.c | ||
| rbtree.c | ||
| str_error_r.c | ||
| string.c | ||
| vsprintf.c | ||
| zalloc.c | ||