summaryrefslogtreecommitdiffstats
path: root/tools/bpf
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2021-06-17 20:54:56 +0200
committerDavid S. Miller <davem@davemloft.net>2021-06-17 20:54:56 +0200
commita52171ae7b803f4587b8172d1768313b4d093d0a (patch)
treeb7504137cddb40533c047a6effd024bb0ba2434f /tools/bpf
parentMerge branch 'gianfar-64-bit-stats' (diff)
parentselftests/bpf: Fix selftests build with old system-wide headers (diff)
downloadlinux-a52171ae7b803f4587b8172d1768313b4d093d0a.tar.xz
linux-a52171ae7b803f4587b8172d1768313b4d093d0a.zip
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Daniel Borkmann says: ==================== pull-request: bpf-next 2021-06-17 The following pull-request contains BPF updates for your *net-next* tree. We've added 50 non-merge commits during the last 25 day(s) which contain a total of 148 files changed, 4779 insertions(+), 1248 deletions(-). The main changes are: 1) BPF infrastructure to migrate TCP child sockets from a listener to another in the same reuseport group/map, from Kuniyuki Iwashima. 2) Add a provably sound, faster and more precise algorithm for tnum_mul() as noted in https://arxiv.org/abs/2105.05398, from Harishankar Vishwanathan. 3) Streamline error reporting changes in libbpf as planned out in the 'libbpf: the road to v1.0' effort, from Andrii Nakryiko. 4) Add broadcast support to xdp_redirect_map(), from Hangbin Liu. 5) Extends bpf_map_lookup_and_delete_elem() functionality to 4 more map types, that is, {LRU_,PERCPU_,LRU_PERCPU_,}HASH, from Denis Salopek. 6) Support new LLVM relocations in libbpf to make them more linker friendly, also add a doc to describe the BPF backend relocations, from Yonghong Song. 7) Silence long standing KUBSAN complaints on register-based shifts in interpreter, from Daniel Borkmann and Eric Biggers. 8) Add dummy PT_REGS macros in libbpf to fail BPF program compilation when target arch cannot be determined, from Lorenz Bauer. 9) Extend AF_XDP to support large umems with 1M+ pages, from Magnus Karlsson. 10) Fix two minor libbpf tc BPF API issues, from Kumar Kartikeya Dwivedi. 11) Move libbpf BPF_SEQ_PRINTF/BPF_SNPRINTF macros that can be used by BPF programs to bpf_helpers.h header, from Florent Revest. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/bpf')
-rw-r--r--tools/bpf/bpftool/Makefile5
-rw-r--r--tools/bpf/bpftool/gen.c27
-rw-r--r--tools/bpf/bpftool/main.c4
3 files changed, 25 insertions, 11 deletions
diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
index d16d289ade7a..d73232be1e99 100644
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile
@@ -136,7 +136,7 @@ endif
BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
-BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o) $(OUTPUT)disasm.o
+BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o xlated_dumper.o btf_dumper.o disasm.o)
OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \
@@ -180,6 +180,9 @@ endif
CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
+$(BOOTSTRAP_OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
+ $(QUIET_CC)$(HOSTCC) $(CFLAGS) -c -MMD -o $@ $<
+
$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
diff --git a/tools/bpf/bpftool/gen.c b/tools/bpf/bpftool/gen.c
index 13b0aa789178..1d71ff8c52fa 100644
--- a/tools/bpf/bpftool/gen.c
+++ b/tools/bpf/bpftool/gen.c
@@ -713,6 +713,7 @@ static int do_skeleton(int argc, char **argv)
#ifndef %2$s \n\
#define %2$s \n\
\n\
+ #include <errno.h> \n\
#include <stdlib.h> \n\
#include <bpf/libbpf.h> \n\
\n\
@@ -793,18 +794,23 @@ static int do_skeleton(int argc, char **argv)
%1$s__open_opts(const struct bpf_object_open_opts *opts) \n\
{ \n\
struct %1$s *obj; \n\
+ int err; \n\
\n\
obj = (struct %1$s *)calloc(1, sizeof(*obj)); \n\
- if (!obj) \n\
+ if (!obj) { \n\
+ errno = ENOMEM; \n\
return NULL; \n\
- if (%1$s__create_skeleton(obj)) \n\
- goto err; \n\
- if (bpf_object__open_skeleton(obj->skeleton, opts)) \n\
- goto err; \n\
+ } \n\
+ \n\
+ err = %1$s__create_skeleton(obj); \n\
+ err = err ?: bpf_object__open_skeleton(obj->skeleton, opts);\n\
+ if (err) \n\
+ goto err_out; \n\
\n\
return obj; \n\
- err: \n\
+ err_out: \n\
%1$s__destroy(obj); \n\
+ errno = -err; \n\
return NULL; \n\
} \n\
\n\
@@ -824,12 +830,15 @@ static int do_skeleton(int argc, char **argv)
%1$s__open_and_load(void) \n\
{ \n\
struct %1$s *obj; \n\
+ int err; \n\
\n\
obj = %1$s__open(); \n\
if (!obj) \n\
return NULL; \n\
- if (%1$s__load(obj)) { \n\
+ err = %1$s__load(obj); \n\
+ if (err) { \n\
%1$s__destroy(obj); \n\
+ errno = -err; \n\
return NULL; \n\
} \n\
return obj; \n\
@@ -860,7 +869,7 @@ static int do_skeleton(int argc, char **argv)
\n\
s = (struct bpf_object_skeleton *)calloc(1, sizeof(*s));\n\
if (!s) \n\
- return -1; \n\
+ goto err; \n\
obj->skeleton = s; \n\
\n\
s->sz = sizeof(*s); \n\
@@ -949,7 +958,7 @@ static int do_skeleton(int argc, char **argv)
return 0; \n\
err: \n\
bpf_object__destroy_skeleton(s); \n\
- return -1; \n\
+ return -ENOMEM; \n\
} \n\
\n\
#endif /* %s */ \n\
diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 7f2817d97079..3ddfd4843738 100644
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -341,8 +341,10 @@ static int do_batch(int argc, char **argv)
n_argc = make_args(buf, n_argv, BATCH_ARG_NB_MAX, lines);
if (!n_argc)
continue;
- if (n_argc < 0)
+ if (n_argc < 0) {
+ err = n_argc;
goto err_close;
+ }
if (json_output) {
jsonw_start_object(json_wtr);