Em Thu, Jan 26, 2017 at 01:19:56PM -0800, Joe Stringer escreveu:

quoted

Add new APIs to pin a BPF program (or specific instances) to the filesystem.
The user can specify the path full path within a BPF filesystem to pin the
program.

bpf_program__pin_instance(prog, path, n) will pin the nth instance of
'prog' to the specified path.
bpf_program__pin(prog, path) will create the directory 'path' (if it
does not exist) and pin each instance within that directory. For
instance, path/0, path/1, path/2.

Signed-off-by: Joe Stringer <redacted>

make: Entering directory '/home/acme/git/linux/tools/perf'
  BUILD:   Doing 'make -j4' parallel build
  CC       /tmp/build/perf/builtin-record.o
  CC       /tmp/build/perf/libbpf.o
  CC       /tmp/build/perf/util/parse-events.o
  INSTALL  trace_plugins
libbpf.c: In function ‘make_dir’:
libbpf.c:1303:6: error: implicit declaration of function ‘mkdir’ [-Werror=implicit-function-declaration]
  if (mkdir(path, 0700) && errno != EEXIST)
      ^~~~~
libbpf.c:1303:2: error: nested extern declaration of ‘mkdir’ [-Werror=nested-externs]
  if (mkdir(path, 0700) && errno != EEXIST)
  ^~
cc1: all warnings being treated as errors
mv: cannot stat '/tmp/build/perf/.libbpf.o.tmp': No such file or directory
/home/acme/git/linux/tools/build/Makefile.build:101: recipe for target '/tmp/build/perf/libbpf.o' failed


And strdup() is not checked for failure, I'm fixing those,

+++ b/tools/lib/bpf/libbpf.c

@@ -36,6 +36,8 @@
 #include <linux/magic.h>
 #include <linux/list.h>
 #include <linux/limits.h>
+#include <sys/stat.h>
+#include <sys/types.h>
 #include <sys/vfs.h>