* [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload.
@ 2022-01-31 22:05 Alexei Starovoitov
2022-01-31 22:05 ` [PATCH bpf-next 1/7] libbpf: Add support for bpf iter in light skeleton Alexei Starovoitov
` (7 more replies)
0 siblings, 8 replies; 16+ messages in thread
From: Alexei Starovoitov @ 2022-01-31 22:05 UTC (permalink / raw)
To: davem; +Cc: daniel, andrii, bpf, kernel-team
From: Alexei Starovoitov <ast@kernel.org>
CO-RE in the kernel support allows bpf preload to switch to light skeleton
and remove libbpf dependency.
This reduces the size of bpf_preload_umd from 300kbyte to 19kbyte and
eventually will make "kernel skeleton" possible.
Alexei Starovoitov (7):
libbpf: Add support for bpf iter in light skeleton.
libbpf: Open code low level bpf commands.
libbpf: Open code raw_tp_open and link_create commands.
bpf: Remove unnecessary setrlimit from bpf preload.
bpf: Convert bpf preload to light skeleton.
bpf: Open code obj_get_info_by_fd in bpf preload.
bpf: Drop libbpf, libelf, libz dependency from bpf preload.
kernel/bpf/preload/Makefile | 28 +-
kernel/bpf/preload/iterators/Makefile | 6 +-
kernel/bpf/preload/iterators/iterators.c | 28 +-
.../bpf/preload/iterators/iterators.lskel.h | 428 ++++++++++++++++++
kernel/bpf/preload/iterators/iterators.skel.h | 412 -----------------
tools/bpf/bpftool/gen.c | 7 +-
tools/lib/bpf/skel_internal.h | 70 ++-
7 files changed, 527 insertions(+), 452 deletions(-)
create mode 100644 kernel/bpf/preload/iterators/iterators.lskel.h
delete mode 100644 kernel/bpf/preload/iterators/iterators.skel.h
--
2.30.2
^ permalink raw reply [flat|nested] 16+ messages in thread
* [PATCH bpf-next 1/7] libbpf: Add support for bpf iter in light skeleton.
2022-01-31 22:05 [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload Alexei Starovoitov
@ 2022-01-31 22:05 ` Alexei Starovoitov
2022-02-01 18:40 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 2/7] libbpf: Open code low level bpf commands Alexei Starovoitov
` (6 subsequent siblings)
7 siblings, 1 reply; 16+ messages in thread
From: Alexei Starovoitov @ 2022-01-31 22:05 UTC (permalink / raw)
To: davem; +Cc: daniel, andrii, bpf, kernel-team
From: Alexei Starovoitov <ast@kernel.org>
bpf iterator programs should use bpf_link_create to attach instead of
bpf_raw_tracepoint_open like other tracing programs.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
tools/bpf/bpftool/gen.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/tools/bpf/bpftool/gen.c b/tools/bpf/bpftool/gen.c
index 8f78c27d41f0..8eacfc79ec43 100644
--- a/tools/bpf/bpftool/gen.c
+++ b/tools/bpf/bpftool/gen.c
@@ -384,7 +384,10 @@ static void codegen_attach_detach(struct bpf_object *obj, const char *obj_name)
printf("\tint fd = bpf_raw_tracepoint_open(\"%s\", prog_fd);\n", tp_name);
break;
case BPF_PROG_TYPE_TRACING:
- printf("\tint fd = bpf_raw_tracepoint_open(NULL, prog_fd);\n");
+ if (bpf_program__expected_attach_type(prog) == BPF_TRACE_ITER)
+ printf("\tint fd = bpf_link_create(prog_fd, 0, BPF_TRACE_ITER, NULL);\n");
+ else
+ printf("\tint fd = bpf_raw_tracepoint_open(NULL, prog_fd);\n");
break;
default:
printf("\tint fd = ((void)prog_fd, 0); /* auto-attach not supported */\n");
--
2.30.2
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH bpf-next 2/7] libbpf: Open code low level bpf commands.
2022-01-31 22:05 [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload Alexei Starovoitov
2022-01-31 22:05 ` [PATCH bpf-next 1/7] libbpf: Add support for bpf iter in light skeleton Alexei Starovoitov
@ 2022-01-31 22:05 ` Alexei Starovoitov
2022-02-01 18:52 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 3/7] libbpf: Open code raw_tp_open and link_create commands Alexei Starovoitov
` (5 subsequent siblings)
7 siblings, 1 reply; 16+ messages in thread
From: Alexei Starovoitov @ 2022-01-31 22:05 UTC (permalink / raw)
To: davem; +Cc: daniel, andrii, bpf, kernel-team
From: Alexei Starovoitov <ast@kernel.org>
Open code low level bpf commands used by light skeleton to
be able to avoid full libbpf eventually.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
tools/lib/bpf/skel_internal.h | 44 +++++++++++++++++++++++++++++++++--
1 file changed, 42 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/skel_internal.h b/tools/lib/bpf/skel_internal.h
index 0b84d8e6b72a..57507f1c1934 100644
--- a/tools/lib/bpf/skel_internal.h
+++ b/tools/lib/bpf/skel_internal.h
@@ -70,19 +70,59 @@ static inline int skel_closenz(int fd)
return -EINVAL;
}
+#ifndef offsetofend
+#define offsetofend(TYPE, MEMBER) \
+ (offsetof(TYPE, MEMBER) + sizeof((((TYPE *)0)->MEMBER)))
+#endif
+
+static inline int skel_map_create(enum bpf_map_type map_type,
+ const char *map_name,
+ __u32 key_size,
+ __u32 value_size,
+ __u32 max_entries)
+{
+ const size_t attr_sz = offsetofend(union bpf_attr, map_extra);
+ union bpf_attr attr;
+
+ memset(&attr, 0, attr_sz);
+
+ attr.map_type = map_type;
+ strncpy(attr.map_name, map_name, sizeof(attr.map_name));
+ attr.key_size = key_size;
+ attr.value_size = value_size;
+ attr.max_entries = max_entries;
+
+ return skel_sys_bpf(BPF_MAP_CREATE, &attr, attr_sz);
+}
+
+static inline int skel_map_update_elem(int fd, const void *key,
+ const void *value, __u64 flags)
+{
+ const size_t attr_sz = offsetofend(union bpf_attr, flags);
+ union bpf_attr attr;
+
+ memset(&attr, 0, attr_sz);
+ attr.map_fd = fd;
+ attr.key = (long) key;
+ attr.value = (long) value;
+ attr.flags = flags;
+
+ return skel_sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, attr_sz);
+}
+
static inline int bpf_load_and_run(struct bpf_load_and_run_opts *opts)
{
int map_fd = -1, prog_fd = -1, key = 0, err;
union bpf_attr attr;
- map_fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, "__loader.map", 4, opts->data_sz, 1, NULL);
+ map_fd = skel_map_create(BPF_MAP_TYPE_ARRAY, "__loader.map", 4, opts->data_sz, 1);
if (map_fd < 0) {
opts->errstr = "failed to create loader map";
err = -errno;
goto out;
}
- err = bpf_map_update_elem(map_fd, &key, opts->data, 0);
+ err = skel_map_update_elem(map_fd, &key, opts->data, 0);
if (err < 0) {
opts->errstr = "failed to update loader map";
err = -errno;
--
2.30.2
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH bpf-next 3/7] libbpf: Open code raw_tp_open and link_create commands.
2022-01-31 22:05 [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload Alexei Starovoitov
2022-01-31 22:05 ` [PATCH bpf-next 1/7] libbpf: Add support for bpf iter in light skeleton Alexei Starovoitov
2022-01-31 22:05 ` [PATCH bpf-next 2/7] libbpf: Open code low level bpf commands Alexei Starovoitov
@ 2022-01-31 22:05 ` Alexei Starovoitov
2022-02-01 19:07 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 4/7] bpf: Remove unnecessary setrlimit from bpf preload Alexei Starovoitov
` (4 subsequent siblings)
7 siblings, 1 reply; 16+ messages in thread
From: Alexei Starovoitov @ 2022-01-31 22:05 UTC (permalink / raw)
To: davem; +Cc: daniel, andrii, bpf, kernel-team
From: Alexei Starovoitov <ast@kernel.org>
Open code raw_tracepoint_open and link_create used by light skeleton
to be able to avoid full libbpf eventually.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
tools/bpf/bpftool/gen.c | 6 +++---
tools/lib/bpf/skel_internal.h | 26 ++++++++++++++++++++++++++
2 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/tools/bpf/bpftool/gen.c b/tools/bpf/bpftool/gen.c
index 8eacfc79ec43..eacfc6a2060d 100644
--- a/tools/bpf/bpftool/gen.c
+++ b/tools/bpf/bpftool/gen.c
@@ -381,13 +381,13 @@ static void codegen_attach_detach(struct bpf_object *obj, const char *obj_name)
switch (bpf_program__type(prog)) {
case BPF_PROG_TYPE_RAW_TRACEPOINT:
tp_name = strchr(bpf_program__section_name(prog), '/') + 1;
- printf("\tint fd = bpf_raw_tracepoint_open(\"%s\", prog_fd);\n", tp_name);
+ printf("\tint fd = skel_raw_tracepoint_open(\"%s\", prog_fd);\n", tp_name);
break;
case BPF_PROG_TYPE_TRACING:
if (bpf_program__expected_attach_type(prog) == BPF_TRACE_ITER)
- printf("\tint fd = bpf_link_create(prog_fd, 0, BPF_TRACE_ITER, NULL);\n");
+ printf("\tint fd = skel_link_create(prog_fd, 0, BPF_TRACE_ITER);\n");
else
- printf("\tint fd = bpf_raw_tracepoint_open(NULL, prog_fd);\n");
+ printf("\tint fd = skel_raw_tracepoint_open(NULL, prog_fd);\n");
break;
default:
printf("\tint fd = ((void)prog_fd, 0); /* auto-attach not supported */\n");
diff --git a/tools/lib/bpf/skel_internal.h b/tools/lib/bpf/skel_internal.h
index 57507f1c1934..dcd3336512d4 100644
--- a/tools/lib/bpf/skel_internal.h
+++ b/tools/lib/bpf/skel_internal.h
@@ -110,6 +110,32 @@ static inline int skel_map_update_elem(int fd, const void *key,
return skel_sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, attr_sz);
}
+static inline int skel_raw_tracepoint_open(const char *name, int prog_fd)
+{
+ const size_t attr_sz = offsetofend(union bpf_attr, raw_tracepoint.prog_fd);
+ union bpf_attr attr;
+
+ memset(&attr, 0, attr_sz);
+ attr.raw_tracepoint.name = (long) name;
+ attr.raw_tracepoint.prog_fd = prog_fd;
+
+ return skel_sys_bpf(BPF_RAW_TRACEPOINT_OPEN, &attr, attr_sz);
+}
+
+static inline int skel_link_create(int prog_fd, int target_fd,
+ enum bpf_attach_type attach_type)
+{
+ const size_t attr_sz = offsetofend(union bpf_attr, link_create.iter_info_len);
+ union bpf_attr attr;
+
+ memset(&attr, 0, attr_sz);
+ attr.link_create.prog_fd = prog_fd;
+ attr.link_create.target_fd = target_fd;
+ attr.link_create.attach_type = attach_type;
+
+ return skel_sys_bpf(BPF_LINK_CREATE, &attr, attr_sz);
+}
+
static inline int bpf_load_and_run(struct bpf_load_and_run_opts *opts)
{
int map_fd = -1, prog_fd = -1, key = 0, err;
--
2.30.2
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH bpf-next 4/7] bpf: Remove unnecessary setrlimit from bpf preload.
2022-01-31 22:05 [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload Alexei Starovoitov
` (2 preceding siblings ...)
2022-01-31 22:05 ` [PATCH bpf-next 3/7] libbpf: Open code raw_tp_open and link_create commands Alexei Starovoitov
@ 2022-01-31 22:05 ` Alexei Starovoitov
2022-02-01 19:09 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 5/7] bpf: Convert bpf preload to light skeleton Alexei Starovoitov
` (3 subsequent siblings)
7 siblings, 1 reply; 16+ messages in thread
From: Alexei Starovoitov @ 2022-01-31 22:05 UTC (permalink / raw)
To: davem; +Cc: daniel, andrii, bpf, kernel-team
From: Alexei Starovoitov <ast@kernel.org>
BPF programs and maps are memcg accounted. setrlimit is obsolete.
Remove its use from bpf preload.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
kernel/bpf/preload/iterators/iterators.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/kernel/bpf/preload/iterators/iterators.c b/kernel/bpf/preload/iterators/iterators.c
index 5d872a705470..2ec85fc6984f 100644
--- a/kernel/bpf/preload/iterators/iterators.c
+++ b/kernel/bpf/preload/iterators/iterators.c
@@ -37,7 +37,6 @@ static int send_link_to_kernel(struct bpf_link *link, const char *link_name)
int main(int argc, char **argv)
{
- struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY };
struct iterators_bpf *skel;
int err, magic;
int debug_fd;
@@ -55,7 +54,6 @@ int main(int argc, char **argv)
printf("bad start magic %d\n", magic);
return 1;
}
- setrlimit(RLIMIT_MEMLOCK, &rlim);
/* libbpf opens BPF object and loads it into the kernel */
skel = iterators_bpf__open_and_load();
if (!skel) {
--
2.30.2
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH bpf-next 5/7] bpf: Convert bpf preload to light skeleton.
2022-01-31 22:05 [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload Alexei Starovoitov
` (3 preceding siblings ...)
2022-01-31 22:05 ` [PATCH bpf-next 4/7] bpf: Remove unnecessary setrlimit from bpf preload Alexei Starovoitov
@ 2022-01-31 22:05 ` Alexei Starovoitov
2022-02-01 19:18 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 6/7] bpf: Open code obj_get_info_by_fd in bpf preload Alexei Starovoitov
` (2 subsequent siblings)
7 siblings, 1 reply; 16+ messages in thread
From: Alexei Starovoitov @ 2022-01-31 22:05 UTC (permalink / raw)
To: davem; +Cc: daniel, andrii, bpf, kernel-team
From: Alexei Starovoitov <ast@kernel.org>
Convert bpffs preload iterators to light skeleton.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
kernel/bpf/preload/iterators/Makefile | 6 +-
kernel/bpf/preload/iterators/iterators.c | 10 +-
.../bpf/preload/iterators/iterators.lskel.h | 428 ++++++++++++++++++
kernel/bpf/preload/iterators/iterators.skel.h | 412 -----------------
4 files changed, 436 insertions(+), 420 deletions(-)
create mode 100644 kernel/bpf/preload/iterators/iterators.lskel.h
delete mode 100644 kernel/bpf/preload/iterators/iterators.skel.h
diff --git a/kernel/bpf/preload/iterators/Makefile b/kernel/bpf/preload/iterators/Makefile
index b8bd60511227..bfe24f8c5a20 100644
--- a/kernel/bpf/preload/iterators/Makefile
+++ b/kernel/bpf/preload/iterators/Makefile
@@ -35,15 +35,15 @@ endif
.PHONY: all clean
-all: iterators.skel.h
+all: iterators.lskel.h
clean:
$(call msg,CLEAN)
$(Q)rm -rf $(OUTPUT) iterators
-iterators.skel.h: $(OUTPUT)/iterators.bpf.o | $(BPFTOOL)
+iterators.lskel.h: $(OUTPUT)/iterators.bpf.o | $(BPFTOOL)
$(call msg,GEN-SKEL,$@)
- $(Q)$(BPFTOOL) gen skeleton $< > $@
+ $(Q)$(BPFTOOL) gen skeleton -L $< > $@
$(OUTPUT)/iterators.bpf.o: iterators.bpf.c $(BPFOBJ) | $(OUTPUT)
diff --git a/kernel/bpf/preload/iterators/iterators.c b/kernel/bpf/preload/iterators/iterators.c
index 2ec85fc6984f..23b74916fb84 100644
--- a/kernel/bpf/preload/iterators/iterators.c
+++ b/kernel/bpf/preload/iterators/iterators.c
@@ -10,20 +10,20 @@
#include <bpf/libbpf.h>
#include <bpf/bpf.h>
#include <sys/mount.h>
-#include "iterators.skel.h"
+#include "iterators.lskel.h"
#include "bpf_preload_common.h"
int to_kernel = -1;
int from_kernel = 0;
-static int send_link_to_kernel(struct bpf_link *link, const char *link_name)
+static int send_link_to_kernel(int link_fd, const char *link_name)
{
struct bpf_preload_info obj = {};
struct bpf_link_info info = {};
__u32 info_len = sizeof(info);
int err;
- err = bpf_obj_get_info_by_fd(bpf_link__fd(link), &info, &info_len);
+ err = bpf_obj_get_info_by_fd(link_fd, &info, &info_len);
if (err)
return err;
obj.link_id = info.id;
@@ -70,10 +70,10 @@ int main(int argc, char **argv)
goto cleanup;
/* send two bpf_link IDs with names to the kernel */
- err = send_link_to_kernel(skel->links.dump_bpf_map, "maps.debug");
+ err = send_link_to_kernel(skel->links.dump_bpf_map_fd, "maps.debug");
if (err)
goto cleanup;
- err = send_link_to_kernel(skel->links.dump_bpf_prog, "progs.debug");
+ err = send_link_to_kernel(skel->links.dump_bpf_prog_fd, "progs.debug");
if (err)
goto cleanup;
diff --git a/kernel/bpf/preload/iterators/iterators.lskel.h b/kernel/bpf/preload/iterators/iterators.lskel.h
new file mode 100644
index 000000000000..d90562d672d2
--- /dev/null
+++ b/kernel/bpf/preload/iterators/iterators.lskel.h
@@ -0,0 +1,428 @@
+/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
+/* THIS FILE IS AUTOGENERATED! */
+#ifndef __ITERATORS_BPF_SKEL_H__
+#define __ITERATORS_BPF_SKEL_H__
+
+#include <stdlib.h>
+#include <bpf/bpf.h>
+#include <bpf/skel_internal.h>
+
+struct iterators_bpf {
+ struct bpf_loader_ctx ctx;
+ struct {
+ struct bpf_map_desc rodata;
+ } maps;
+ struct {
+ struct bpf_prog_desc dump_bpf_map;
+ struct bpf_prog_desc dump_bpf_prog;
+ } progs;
+ struct {
+ int dump_bpf_map_fd;
+ int dump_bpf_prog_fd;
+ } links;
+ struct iterators_bpf__rodata {
+ } *rodata;
+};
+
+static inline int
+iterators_bpf__dump_bpf_map__attach(struct iterators_bpf *skel)
+{
+ int prog_fd = skel->progs.dump_bpf_map.prog_fd;
+ int fd = skel_link_create(prog_fd, 0, BPF_TRACE_ITER);
+
+ if (fd > 0)
+ skel->links.dump_bpf_map_fd = fd;
+ return fd;
+}
+
+static inline int
+iterators_bpf__dump_bpf_prog__attach(struct iterators_bpf *skel)
+{
+ int prog_fd = skel->progs.dump_bpf_prog.prog_fd;
+ int fd = skel_link_create(prog_fd, 0, BPF_TRACE_ITER);
+
+ if (fd > 0)
+ skel->links.dump_bpf_prog_fd = fd;
+ return fd;
+}
+
+static inline int
+iterators_bpf__attach(struct iterators_bpf *skel)
+{
+ int ret = 0;
+
+ ret = ret < 0 ? ret : iterators_bpf__dump_bpf_map__attach(skel);
+ ret = ret < 0 ? ret : iterators_bpf__dump_bpf_prog__attach(skel);
+ return ret < 0 ? ret : 0;
+}
+
+static inline void
+iterators_bpf__detach(struct iterators_bpf *skel)
+{
+ skel_closenz(skel->links.dump_bpf_map_fd);
+ skel_closenz(skel->links.dump_bpf_prog_fd);
+}
+static void
+iterators_bpf__destroy(struct iterators_bpf *skel)
+{
+ if (!skel)
+ return;
+ iterators_bpf__detach(skel);
+ skel_closenz(skel->progs.dump_bpf_map.prog_fd);
+ skel_closenz(skel->progs.dump_bpf_prog.prog_fd);
+ munmap(skel->rodata, 4096);
+ skel_closenz(skel->maps.rodata.map_fd);
+ free(skel);
+}
+static inline struct iterators_bpf *
+iterators_bpf__open(void)
+{
+ struct iterators_bpf *skel;
+
+ skel = calloc(sizeof(*skel), 1);
+ if (!skel)
+ goto cleanup;
+ skel->ctx.sz = (void *)&skel->links - (void *)skel;
+ skel->rodata =
+ mmap(NULL, 4096, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+ if (skel->rodata == (void *) -1)
+ goto cleanup;
+ memcpy(skel->rodata, (void *)"\
+\x20\x20\x69\x64\x20\x6e\x61\x6d\x65\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\
+\x20\x20\x20\x6d\x61\x78\x5f\x65\x6e\x74\x72\x69\x65\x73\x0a\0\x25\x34\x75\x20\
+\x25\x2d\x31\x36\x73\x25\x36\x64\x0a\0\x20\x20\x69\x64\x20\x6e\x61\x6d\x65\x20\
+\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x61\x74\x74\x61\x63\x68\x65\
+\x64\x0a\0\x25\x34\x75\x20\x25\x2d\x31\x36\x73\x20\x25\x73\x20\x25\x73\x0a\0", 98);
+ skel->maps.rodata.initial_value = (__u64)(long)skel->rodata;
+ return skel;
+cleanup:
+ iterators_bpf__destroy(skel);
+ return NULL;
+}
+
+static inline int
+iterators_bpf__load(struct iterators_bpf *skel)
+{
+ struct bpf_load_and_run_opts opts = {};
+ int err;
+
+ opts.ctx = (struct bpf_loader_ctx *)skel;
+ opts.data_sz = 6056;
+ opts.data = (void *)"\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
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+\0\0\0\0";
+ opts.insns_sz = 2184;
+ opts.insns = (void *)"\
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+\x18\x61\0\0\0\0\0\0\0\0\0\0\x30\x0e\0\0\x7b\x01\0\0\0\0\0\0\xb7\x01\0\0\x12\0\
+\0\0\x18\x62\0\0\0\0\0\0\0\0\0\0\x30\x0e\0\0\xb7\x03\0\0\x1c\0\0\0\x85\0\0\0\
+\xa6\0\0\0\xbf\x07\0\0\0\0\0\0\xc5\x07\xd4\xff\0\0\0\0\x63\x7a\x78\xff\0\0\0\0\
+\x61\xa0\x78\xff\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x80\x0e\0\0\x63\x01\0\0\0\
+\0\0\0\x61\x60\x20\0\0\0\0\0\x15\0\x03\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\
+\x5c\x0e\0\0\x63\x01\0\0\0\0\0\0\xb7\x01\0\0\0\0\0\0\x18\x62\0\0\0\0\0\0\0\0\0\
+\0\x50\x0e\0\0\xb7\x03\0\0\x48\0\0\0\x85\0\0\0\xa6\0\0\0\xbf\x07\0\0\0\0\0\0\
+\xc5\x07\xc3\xff\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x63\x71\0\0\0\0\0\
+\0\x79\x63\x18\0\0\0\0\0\x15\x03\x04\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x98\
+\x0e\0\0\xb7\x02\0\0\x62\0\0\0\x85\0\0\0\x94\0\0\0\x18\x62\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\0\x61\x20\0\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x08\x0f\0\0\x63\x01\0\
+\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\0\x0f\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\
+\x10\x0f\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x98\x0e\0\0\x18\
+\x61\0\0\0\0\0\0\0\0\0\0\x18\x0f\0\0\x7b\x01\0\0\0\0\0\0\xb7\x01\0\0\x02\0\0\0\
+\x18\x62\0\0\0\0\0\0\0\0\0\0\x08\x0f\0\0\xb7\x03\0\0\x20\0\0\0\x85\0\0\0\xa6\0\
+\0\0\xbf\x07\0\0\0\0\0\0\xc5\x07\xa3\xff\0\0\0\0\x18\x62\0\0\0\0\0\0\0\0\0\0\0\
+\0\0\0\x61\x20\0\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x28\x0f\0\0\x63\x01\0\0\
+\0\0\0\0\xb7\x01\0\0\x16\0\0\0\x18\x62\0\0\0\0\0\0\0\0\0\0\x28\x0f\0\0\xb7\x03\
+\0\0\x04\0\0\0\x85\0\0\0\xa6\0\0\0\xbf\x07\0\0\0\0\0\0\xc5\x07\x96\xff\0\0\0\0\
+\x18\x60\0\0\0\0\0\0\0\0\0\0\x30\x0f\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x78\x11\0\
+\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x38\x0f\0\0\x18\x61\0\0\0\0\
+\0\0\0\0\0\0\x70\x11\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x40\
+\x10\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\xb8\x11\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\
+\0\0\0\0\0\0\0\0\0\x48\x10\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\xc8\x11\0\0\x7b\x01\
+\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\xe8\x10\0\0\x18\x61\0\0\0\0\0\0\0\0\0\
+\0\xe8\x11\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x18\x61\
+\0\0\0\0\0\0\0\0\0\0\xe0\x11\0\0\x7b\x01\0\0\0\0\0\0\x61\x60\x08\0\0\0\0\0\x18\
+\x61\0\0\0\0\0\0\0\0\0\0\x80\x11\0\0\x63\x01\0\0\0\0\0\0\x61\x60\x0c\0\0\0\0\0\
+\x18\x61\0\0\0\0\0\0\0\0\0\0\x84\x11\0\0\x63\x01\0\0\0\0\0\0\x79\x60\x10\0\0\0\
+\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x88\x11\0\0\x7b\x01\0\0\0\0\0\0\x61\xa0\x78\
+\xff\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\xb0\x11\0\0\x63\x01\0\0\0\0\0\0\x18\
+\x61\0\0\0\0\0\0\0\0\0\0\xf8\x11\0\0\xb7\x02\0\0\x11\0\0\0\xb7\x03\0\0\x0c\0\0\
+\0\xb7\x04\0\0\0\0\0\0\x85\0\0\0\xa7\0\0\0\xbf\x07\0\0\0\0\0\0\xc5\x07\x60\xff\
+\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x68\x11\0\0\x63\x70\x6c\0\0\0\0\0\x77\x07\
+\0\0\x20\0\0\0\x63\x70\x70\0\0\0\0\0\xb7\x01\0\0\x05\0\0\0\x18\x62\0\0\0\0\0\0\
+\0\0\0\0\x68\x11\0\0\xb7\x03\0\0\x8c\0\0\0\x85\0\0\0\xa6\0\0\0\xbf\x07\0\0\0\0\
+\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\xd8\x11\0\0\x61\x01\0\0\0\0\0\0\xd5\x01\x02\0\
+\0\0\0\0\xbf\x19\0\0\0\0\0\0\x85\0\0\0\xa8\0\0\0\xc5\x07\x4e\xff\0\0\0\0\x63\
+\x7a\x80\xff\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x10\x12\0\0\x18\x61\0\0\0\0\0\
+\0\0\0\0\0\x10\x17\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x18\x12\
+\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x08\x17\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\
+\0\0\0\0\0\0\0\x28\x14\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x50\x17\0\0\x7b\x01\0\0\
+\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x30\x14\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\
+\x60\x17\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\xd0\x15\0\0\x18\
+\x61\0\0\0\0\0\0\0\0\0\0\x80\x17\0\0\x7b\x01\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\
+\0\0\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x78\x17\0\0\x7b\x01\0\0\0\0\0\0\x61\
+\x60\x08\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x18\x17\0\0\x63\x01\0\0\0\0\0\0\
+\x61\x60\x0c\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x1c\x17\0\0\x63\x01\0\0\0\0\
+\0\0\x79\x60\x10\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x20\x17\0\0\x7b\x01\0\0\
+\0\0\0\0\x61\xa0\x78\xff\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x48\x17\0\0\x63\
+\x01\0\0\0\0\0\0\x18\x61\0\0\0\0\0\0\0\0\0\0\x90\x17\0\0\xb7\x02\0\0\x12\0\0\0\
+\xb7\x03\0\0\x0c\0\0\0\xb7\x04\0\0\0\0\0\0\x85\0\0\0\xa7\0\0\0\xbf\x07\0\0\0\0\
+\0\0\xc5\x07\x17\xff\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\0\x17\0\0\x63\x70\x6c\
+\0\0\0\0\0\x77\x07\0\0\x20\0\0\0\x63\x70\x70\0\0\0\0\0\xb7\x01\0\0\x05\0\0\0\
+\x18\x62\0\0\0\0\0\0\0\0\0\0\0\x17\0\0\xb7\x03\0\0\x8c\0\0\0\x85\0\0\0\xa6\0\0\
+\0\xbf\x07\0\0\0\0\0\0\x18\x60\0\0\0\0\0\0\0\0\0\0\x70\x17\0\0\x61\x01\0\0\0\0\
+\0\0\xd5\x01\x02\0\0\0\0\0\xbf\x19\0\0\0\0\0\0\x85\0\0\0\xa8\0\0\0\xc5\x07\x05\
+\xff\0\0\0\0\x63\x7a\x84\xff\0\0\0\0\x61\xa1\x78\xff\0\0\0\0\xd5\x01\x02\0\0\0\
+\0\0\xbf\x19\0\0\0\0\0\0\x85\0\0\0\xa8\0\0\0\x61\xa0\x80\xff\0\0\0\0\x63\x06\
+\x28\0\0\0\0\0\x61\xa0\x84\xff\0\0\0\0\x63\x06\x2c\0\0\0\0\0\x18\x61\0\0\0\0\0\
+\0\0\0\0\0\0\0\0\0\x61\x10\0\0\0\0\0\0\x63\x06\x18\0\0\0\0\0\xb7\0\0\0\0\0\0\0\
+\x95\0\0\0\0\0\0\0";
+ err = bpf_load_and_run(&opts);
+ if (err < 0)
+ return err;
+ skel->rodata =
+ mmap(skel->rodata, 4096, PROT_READ, MAP_SHARED | MAP_FIXED,
+ skel->maps.rodata.map_fd, 0);
+ return 0;
+}
+
+static inline struct iterators_bpf *
+iterators_bpf__open_and_load(void)
+{
+ struct iterators_bpf *skel;
+
+ skel = iterators_bpf__open();
+ if (!skel)
+ return NULL;
+ if (iterators_bpf__load(skel)) {
+ iterators_bpf__destroy(skel);
+ return NULL;
+ }
+ return skel;
+}
+
+#endif /* __ITERATORS_BPF_SKEL_H__ */
diff --git a/kernel/bpf/preload/iterators/iterators.skel.h b/kernel/bpf/preload/iterators/iterators.skel.h
deleted file mode 100644
index cf9a6a94b3a4..000000000000
--- a/kernel/bpf/preload/iterators/iterators.skel.h
+++ /dev/null
@@ -1,412 +0,0 @@
-/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
-
-/* THIS FILE IS AUTOGENERATED! */
-#ifndef __ITERATORS_BPF_SKEL_H__
-#define __ITERATORS_BPF_SKEL_H__
-
-#include <stdlib.h>
-#include <bpf/libbpf.h>
-
-struct iterators_bpf {
- struct bpf_object_skeleton *skeleton;
- struct bpf_object *obj;
- struct {
- struct bpf_map *rodata;
- } maps;
- struct {
- struct bpf_program *dump_bpf_map;
- struct bpf_program *dump_bpf_prog;
- } progs;
- struct {
- struct bpf_link *dump_bpf_map;
- struct bpf_link *dump_bpf_prog;
- } links;
- struct iterators_bpf__rodata {
- char dump_bpf_map____fmt[35];
- char dump_bpf_map____fmt_1[14];
- char dump_bpf_prog____fmt[32];
- char dump_bpf_prog____fmt_2[17];
- } *rodata;
-};
-
-static void
-iterators_bpf__destroy(struct iterators_bpf *obj)
-{
- if (!obj)
- return;
- if (obj->skeleton)
- bpf_object__destroy_skeleton(obj->skeleton);
- free(obj);
-}
-
-static inline int
-iterators_bpf__create_skeleton(struct iterators_bpf *obj);
-
-static inline struct iterators_bpf *
-iterators_bpf__open_opts(const struct bpf_object_open_opts *opts)
-{
- struct iterators_bpf *obj;
-
- obj = (struct iterators_bpf *)calloc(1, sizeof(*obj));
- if (!obj)
- return NULL;
- if (iterators_bpf__create_skeleton(obj))
- goto err;
- if (bpf_object__open_skeleton(obj->skeleton, opts))
- goto err;
-
- return obj;
-err:
- iterators_bpf__destroy(obj);
- return NULL;
-}
-
-static inline struct iterators_bpf *
-iterators_bpf__open(void)
-{
- return iterators_bpf__open_opts(NULL);
-}
-
-static inline int
-iterators_bpf__load(struct iterators_bpf *obj)
-{
- return bpf_object__load_skeleton(obj->skeleton);
-}
-
-static inline struct iterators_bpf *
-iterators_bpf__open_and_load(void)
-{
- struct iterators_bpf *obj;
-
- obj = iterators_bpf__open();
- if (!obj)
- return NULL;
- if (iterators_bpf__load(obj)) {
- iterators_bpf__destroy(obj);
- return NULL;
- }
- return obj;
-}
-
-static inline int
-iterators_bpf__attach(struct iterators_bpf *obj)
-{
- return bpf_object__attach_skeleton(obj->skeleton);
-}
-
-static inline void
-iterators_bpf__detach(struct iterators_bpf *obj)
-{
- return bpf_object__detach_skeleton(obj->skeleton);
-}
-
-static inline int
-iterators_bpf__create_skeleton(struct iterators_bpf *obj)
-{
- struct bpf_object_skeleton *s;
-
- s = (struct bpf_object_skeleton *)calloc(1, sizeof(*s));
- if (!s)
- return -1;
- obj->skeleton = s;
-
- s->sz = sizeof(*s);
- s->name = "iterators_bpf";
- s->obj = &obj->obj;
-
- /* maps */
- s->map_cnt = 1;
- s->map_skel_sz = sizeof(*s->maps);
- s->maps = (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_skel_sz);
- if (!s->maps)
- goto err;
-
- s->maps[0].name = "iterator.rodata";
- s->maps[0].map = &obj->maps.rodata;
- s->maps[0].mmaped = (void **)&obj->rodata;
-
- /* programs */
- s->prog_cnt = 2;
- s->prog_skel_sz = sizeof(*s->progs);
- s->progs = (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->prog_skel_sz);
- if (!s->progs)
- goto err;
-
- s->progs[0].name = "dump_bpf_map";
- s->progs[0].prog = &obj->progs.dump_bpf_map;
- s->progs[0].link = &obj->links.dump_bpf_map;
-
- s->progs[1].name = "dump_bpf_prog";
- s->progs[1].prog = &obj->progs.dump_bpf_prog;
- s->progs[1].link = &obj->links.dump_bpf_prog;
-
- s->data_sz = 7176;
- s->data = (void *)"\
-\x7f\x45\x4c\x46\x02\x01\x01\0\0\0\0\0\0\0\0\0\x01\0\xf7\0\x01\0\0\0\0\0\0\0\0\
-\0\0\0\0\0\0\0\0\0\0\0\x48\x18\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\x40\0\x0f\0\
-\x0e\0\x79\x12\0\0\0\0\0\0\x79\x26\0\0\0\0\0\0\x79\x17\x08\0\0\0\0\0\x15\x07\
-\x1a\0\0\0\0\0\x79\x21\x10\0\0\0\0\0\x55\x01\x08\0\0\0\0\0\xbf\xa4\0\0\0\0\0\0\
-\x07\x04\0\0\xe8\xff\xff\xff\xbf\x61\0\0\0\0\0\0\x18\x02\0\0\0\0\0\0\0\0\0\0\0\
-\0\0\0\xb7\x03\0\0\x23\0\0\0\xb7\x05\0\0\0\0\0\0\x85\0\0\0\x7e\0\0\0\x61\x71\0\
-\0\0\0\0\0\x7b\x1a\xe8\xff\0\0\0\0\xb7\x01\0\0\x04\0\0\0\xbf\x72\0\0\0\0\0\0\
-\x0f\x12\0\0\0\0\0\0\x7b\x2a\xf0\xff\0\0\0\0\x61\x71\x14\0\0\0\0\0\x7b\x1a\xf8\
-\xff\0\0\0\0\xbf\xa4\0\0\0\0\0\0\x07\x04\0\0\xe8\xff\xff\xff\xbf\x61\0\0\0\0\0\
-\0\x18\x02\0\0\x23\0\0\0\0\0\0\0\0\0\0\0\xb7\x03\0\0\x0e\0\0\0\xb7\x05\0\0\x18\
-\0\0\0\x85\0\0\0\x7e\0\0\0\xb7\0\0\0\0\0\0\0\x95\0\0\0\0\0\0\0\x79\x12\0\0\0\0\
-\0\0\x79\x26\0\0\0\0\0\0\x79\x11\x08\0\0\0\0\0\x15\x01\x3b\0\0\0\0\0\x79\x17\0\
-\0\0\0\0\0\x79\x21\x10\0\0\0\0\0\x55\x01\x08\0\0\0\0\0\xbf\xa4\0\0\0\0\0\0\x07\
-\x04\0\0\xd0\xff\xff\xff\xbf\x61\0\0\0\0\0\0\x18\x02\0\0\x31\0\0\0\0\0\0\0\0\0\
-\0\0\xb7\x03\0\0\x20\0\0\0\xb7\x05\0\0\0\0\0\0\x85\0\0\0\x7e\0\0\0\x7b\x6a\xc8\
-\xff\0\0\0\0\x61\x71\0\0\0\0\0\0\x7b\x1a\xd0\xff\0\0\0\0\xb7\x03\0\0\x04\0\0\0\
-\xbf\x79\0\0\0\0\0\0\x0f\x39\0\0\0\0\0\0\x79\x71\x28\0\0\0\0\0\x79\x78\x30\0\0\
-\0\0\0\x15\x08\x18\0\0\0\0\0\xb7\x02\0\0\0\0\0\0\x0f\x21\0\0\0\0\0\0\x61\x11\
-\x04\0\0\0\0\0\x79\x83\x08\0\0\0\0\0\x67\x01\0\0\x03\0\0\0\x0f\x13\0\0\0\0\0\0\
-\x79\x86\0\0\0\0\0\0\xbf\xa1\0\0\0\0\0\0\x07\x01\0\0\xf8\xff\xff\xff\xb7\x02\0\
-\0\x08\0\0\0\x85\0\0\0\x71\0\0\0\xb7\x01\0\0\0\0\0\0\x79\xa3\xf8\xff\0\0\0\0\
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-\0\0\0\0\0\0\0\0\0\0\0\0\xeb\x0c\0\0\0\0\0\0\x2c\x04\0\0\0\0\0\0\0\0\0\0\0\0\0\
-\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\xa9\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
-\0\0\0\0\0\x18\x11\0\0\0\0\0\0\x98\x01\0\0\0\0\0\0\x0e\0\0\0\x0e\0\0\0\x08\0\0\
-\0\0\0\0\0\x18\0\0\0\0\0\0\0\x4a\0\0\0\x09\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
-\0\xb0\x12\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x08\0\0\0\x02\0\0\0\x08\0\0\0\0\0\0\0\
-\x10\0\0\0\0\0\0\0\x69\0\0\0\x09\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\xd0\x12\
-\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x08\0\0\0\x03\0\0\0\x08\0\0\0\0\0\0\0\x10\0\0\0\
-\0\0\0\0\xb9\0\0\0\x09\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\xf0\x12\0\0\0\0\0\
-\0\x50\0\0\0\0\0\0\0\x08\0\0\0\x06\0\0\0\x08\0\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\
-\x07\0\0\0\x09\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x40\x13\0\0\0\0\0\0\xe0\
-\x03\0\0\0\0\0\0\x08\0\0\0\x07\0\0\0\x08\0\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\x7b\0\
-\0\0\x03\x4c\xff\x6f\0\0\0\x80\0\0\0\0\0\0\0\0\0\0\0\0\x20\x17\0\0\0\0\0\0\x07\
-\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\xa1\0\0\0\x03\
-\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x27\x17\0\0\0\0\0\0\x1a\x01\0\0\0\0\0\0\
-\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
-
- return 0;
-err:
- bpf_object__destroy_skeleton(s);
- return -1;
-}
-
-#endif /* __ITERATORS_BPF_SKEL_H__ */
--
2.30.2
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH bpf-next 6/7] bpf: Open code obj_get_info_by_fd in bpf preload.
2022-01-31 22:05 [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload Alexei Starovoitov
` (4 preceding siblings ...)
2022-01-31 22:05 ` [PATCH bpf-next 5/7] bpf: Convert bpf preload to light skeleton Alexei Starovoitov
@ 2022-01-31 22:05 ` Alexei Starovoitov
2022-02-01 19:26 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 7/7] bpf: Drop libbpf, libelf, libz dependency from " Alexei Starovoitov
2022-02-01 23:00 ` [PATCH bpf-next 0/7] bpf: drop libbpf " patchwork-bot+netdevbpf
7 siblings, 1 reply; 16+ messages in thread
From: Alexei Starovoitov @ 2022-01-31 22:05 UTC (permalink / raw)
To: davem; +Cc: daniel, andrii, bpf, kernel-team
From: Alexei Starovoitov <ast@kernel.org>
Open code obj_get_info_by_fd in bpf preload.
It's the last part of libbpf that preload/iterators were using.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
kernel/bpf/preload/iterators/iterators.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/kernel/bpf/preload/iterators/iterators.c b/kernel/bpf/preload/iterators/iterators.c
index 23b74916fb84..4dafe0f4f2b2 100644
--- a/kernel/bpf/preload/iterators/iterators.c
+++ b/kernel/bpf/preload/iterators/iterators.c
@@ -16,6 +16,22 @@
int to_kernel = -1;
int from_kernel = 0;
+static int __bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len)
+{
+ union bpf_attr attr;
+ int err;
+
+ memset(&attr, 0, sizeof(attr));
+ attr.info.bpf_fd = bpf_fd;
+ attr.info.info_len = *info_len;
+ attr.info.info = (long) info;
+
+ err = skel_sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
+ if (!err)
+ *info_len = attr.info.info_len;
+ return err;
+}
+
static int send_link_to_kernel(int link_fd, const char *link_name)
{
struct bpf_preload_info obj = {};
@@ -23,7 +39,7 @@ static int send_link_to_kernel(int link_fd, const char *link_name)
__u32 info_len = sizeof(info);
int err;
- err = bpf_obj_get_info_by_fd(link_fd, &info, &info_len);
+ err = __bpf_obj_get_info_by_fd(link_fd, &info, &info_len);
if (err)
return err;
obj.link_id = info.id;
--
2.30.2
^ permalink raw reply related [flat|nested] 16+ messages in thread
* [PATCH bpf-next 7/7] bpf: Drop libbpf, libelf, libz dependency from bpf preload.
2022-01-31 22:05 [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload Alexei Starovoitov
` (5 preceding siblings ...)
2022-01-31 22:05 ` [PATCH bpf-next 6/7] bpf: Open code obj_get_info_by_fd in bpf preload Alexei Starovoitov
@ 2022-01-31 22:05 ` Alexei Starovoitov
2022-02-01 19:27 ` Martin KaFai Lau
2022-02-01 23:00 ` [PATCH bpf-next 0/7] bpf: drop libbpf " patchwork-bot+netdevbpf
7 siblings, 1 reply; 16+ messages in thread
From: Alexei Starovoitov @ 2022-01-31 22:05 UTC (permalink / raw)
To: davem; +Cc: daniel, andrii, bpf, kernel-team
From: Alexei Starovoitov <ast@kernel.org>
Drop libbpf, libelf, libz dependency from bpf preload.
This reduces bpf_preload_umd binary size
from 1.7M to 30k unstripped with debug info
and from 300k to 19k stripped.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
kernel/bpf/preload/Makefile | 28 ++--------------------------
1 file changed, 2 insertions(+), 26 deletions(-)
diff --git a/kernel/bpf/preload/Makefile b/kernel/bpf/preload/Makefile
index 1400ac58178e..baf47d9c7557 100644
--- a/kernel/bpf/preload/Makefile
+++ b/kernel/bpf/preload/Makefile
@@ -1,40 +1,16 @@
# SPDX-License-Identifier: GPL-2.0
LIBBPF_SRCS = $(srctree)/tools/lib/bpf/
-LIBBPF_OUT = $(abspath $(obj))/libbpf
-LIBBPF_A = $(LIBBPF_OUT)/libbpf.a
-LIBBPF_DESTDIR = $(LIBBPF_OUT)
-LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include
-
-# Although not in use by libbpf's Makefile, set $(O) so that the "dummy" test
-# in tools/scripts/Makefile.include always succeeds when building the kernel
-# with $(O) pointing to a relative path, as in "make O=build bindeb-pkg".
-$(LIBBPF_A): | $(LIBBPF_OUT)
- $(Q)$(MAKE) -C $(LIBBPF_SRCS) O=$(LIBBPF_OUT)/ OUTPUT=$(LIBBPF_OUT)/ \
- DESTDIR=$(LIBBPF_DESTDIR) prefix= \
- $(LIBBPF_OUT)/libbpf.a install_headers
-
-libbpf_hdrs: $(LIBBPF_A)
-
-.PHONY: libbpf_hdrs
-
-$(LIBBPF_OUT):
- $(call msg,MKDIR,$@)
- $(Q)mkdir -p $@
+LIBBPF_INCLUDE = $(LIBBPF_SRCS)/..
userccflags += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi \
-I $(LIBBPF_INCLUDE) -Wno-unused-result
userprogs := bpf_preload_umd
-clean-files := libbpf/
-
-$(obj)/iterators/iterators.o: | libbpf_hdrs
-
bpf_preload_umd-objs := iterators/iterators.o
-bpf_preload_umd-userldlibs := $(LIBBPF_A) -lelf -lz
-$(obj)/bpf_preload_umd: $(LIBBPF_A)
+$(obj)/bpf_preload_umd:
$(obj)/bpf_preload_umd_blob.o: $(obj)/bpf_preload_umd
--
2.30.2
^ permalink raw reply related [flat|nested] 16+ messages in thread
* Re: [PATCH bpf-next 1/7] libbpf: Add support for bpf iter in light skeleton.
2022-01-31 22:05 ` [PATCH bpf-next 1/7] libbpf: Add support for bpf iter in light skeleton Alexei Starovoitov
@ 2022-02-01 18:40 ` Martin KaFai Lau
0 siblings, 0 replies; 16+ messages in thread
From: Martin KaFai Lau @ 2022-02-01 18:40 UTC (permalink / raw)
To: Alexei Starovoitov; +Cc: davem, daniel, andrii, bpf, kernel-team
On Mon, Jan 31, 2022 at 02:05:22PM -0800, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@kernel.org>
>
> bpf iterator programs should use bpf_link_create to attach instead of
> bpf_raw_tracepoint_open like other tracing programs.
Acked-by: Martin KaFai Lau <kafai@fb.com>
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH bpf-next 2/7] libbpf: Open code low level bpf commands.
2022-01-31 22:05 ` [PATCH bpf-next 2/7] libbpf: Open code low level bpf commands Alexei Starovoitov
@ 2022-02-01 18:52 ` Martin KaFai Lau
0 siblings, 0 replies; 16+ messages in thread
From: Martin KaFai Lau @ 2022-02-01 18:52 UTC (permalink / raw)
To: Alexei Starovoitov; +Cc: davem, daniel, andrii, bpf, kernel-team
On Mon, Jan 31, 2022 at 02:05:23PM -0800, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@kernel.org>
>
> Open code low level bpf commands used by light skeleton to
> be able to avoid full libbpf eventually.
Acked-by: Martin KaFai Lau <kafai@fb.com>
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH bpf-next 3/7] libbpf: Open code raw_tp_open and link_create commands.
2022-01-31 22:05 ` [PATCH bpf-next 3/7] libbpf: Open code raw_tp_open and link_create commands Alexei Starovoitov
@ 2022-02-01 19:07 ` Martin KaFai Lau
0 siblings, 0 replies; 16+ messages in thread
From: Martin KaFai Lau @ 2022-02-01 19:07 UTC (permalink / raw)
To: Alexei Starovoitov; +Cc: davem, daniel, andrii, bpf, kernel-team
On Mon, Jan 31, 2022 at 02:05:24PM -0800, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@kernel.org>
>
> Open code raw_tracepoint_open and link_create used by light skeleton
> to be able to avoid full libbpf eventually.
Acked-by: Martin KaFai Lau <kafai@fb.com>
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH bpf-next 4/7] bpf: Remove unnecessary setrlimit from bpf preload.
2022-01-31 22:05 ` [PATCH bpf-next 4/7] bpf: Remove unnecessary setrlimit from bpf preload Alexei Starovoitov
@ 2022-02-01 19:09 ` Martin KaFai Lau
0 siblings, 0 replies; 16+ messages in thread
From: Martin KaFai Lau @ 2022-02-01 19:09 UTC (permalink / raw)
To: Alexei Starovoitov; +Cc: davem, daniel, andrii, bpf, kernel-team
On Mon, Jan 31, 2022 at 02:05:25PM -0800, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@kernel.org>
>
> BPF programs and maps are memcg accounted. setrlimit is obsolete.
> Remove its use from bpf preload.
Acked-by: Martin KaFai Lau <kafai@fb.com>
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH bpf-next 5/7] bpf: Convert bpf preload to light skeleton.
2022-01-31 22:05 ` [PATCH bpf-next 5/7] bpf: Convert bpf preload to light skeleton Alexei Starovoitov
@ 2022-02-01 19:18 ` Martin KaFai Lau
0 siblings, 0 replies; 16+ messages in thread
From: Martin KaFai Lau @ 2022-02-01 19:18 UTC (permalink / raw)
To: Alexei Starovoitov; +Cc: davem, daniel, andrii, bpf, kernel-team
On Mon, Jan 31, 2022 at 02:05:26PM -0800, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@kernel.org>
>
> Convert bpffs preload iterators to light skeleton.
Acked-by: Martin KaFai Lau <kafai@fb.com>
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH bpf-next 6/7] bpf: Open code obj_get_info_by_fd in bpf preload.
2022-01-31 22:05 ` [PATCH bpf-next 6/7] bpf: Open code obj_get_info_by_fd in bpf preload Alexei Starovoitov
@ 2022-02-01 19:26 ` Martin KaFai Lau
0 siblings, 0 replies; 16+ messages in thread
From: Martin KaFai Lau @ 2022-02-01 19:26 UTC (permalink / raw)
To: Alexei Starovoitov; +Cc: davem, daniel, andrii, bpf, kernel-team
On Mon, Jan 31, 2022 at 02:05:27PM -0800, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@kernel.org>
>
> Open code obj_get_info_by_fd in bpf preload.
> It's the last part of libbpf that preload/iterators were using.
Acked-by: Martin KaFai Lau <kafai@fb.com>
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH bpf-next 7/7] bpf: Drop libbpf, libelf, libz dependency from bpf preload.
2022-01-31 22:05 ` [PATCH bpf-next 7/7] bpf: Drop libbpf, libelf, libz dependency from " Alexei Starovoitov
@ 2022-02-01 19:27 ` Martin KaFai Lau
0 siblings, 0 replies; 16+ messages in thread
From: Martin KaFai Lau @ 2022-02-01 19:27 UTC (permalink / raw)
To: Alexei Starovoitov; +Cc: davem, daniel, andrii, bpf, kernel-team
On Mon, Jan 31, 2022 at 02:05:28PM -0800, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@kernel.org>
>
> Drop libbpf, libelf, libz dependency from bpf preload.
> This reduces bpf_preload_umd binary size
> from 1.7M to 30k unstripped with debug info
> and from 300k to 19k stripped.
Acked-by: Martin KaFai Lau <kafai@fb.com>
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload.
2022-01-31 22:05 [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload Alexei Starovoitov
` (6 preceding siblings ...)
2022-01-31 22:05 ` [PATCH bpf-next 7/7] bpf: Drop libbpf, libelf, libz dependency from " Alexei Starovoitov
@ 2022-02-01 23:00 ` patchwork-bot+netdevbpf
7 siblings, 0 replies; 16+ messages in thread
From: patchwork-bot+netdevbpf @ 2022-02-01 23:00 UTC (permalink / raw)
To: Alexei Starovoitov; +Cc: davem, daniel, andrii, bpf, kernel-team
Hello:
This series was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@iogearbox.net>:
On Mon, 31 Jan 2022 14:05:21 -0800 you wrote:
> From: Alexei Starovoitov <ast@kernel.org>
>
> CO-RE in the kernel support allows bpf preload to switch to light skeleton
> and remove libbpf dependency.
> This reduces the size of bpf_preload_umd from 300kbyte to 19kbyte and
> eventually will make "kernel skeleton" possible.
>
> [...]
Here is the summary with links:
- [bpf-next,1/7] libbpf: Add support for bpf iter in light skeleton.
https://git.kernel.org/bpf/bpf-next/c/42d1d53fedc9
- [bpf-next,2/7] libbpf: Open code low level bpf commands.
https://git.kernel.org/bpf/bpf-next/c/e981f41fd029
- [bpf-next,3/7] libbpf: Open code raw_tp_open and link_create commands.
https://git.kernel.org/bpf/bpf-next/c/c69f94a33d12
- [bpf-next,4/7] bpf: Remove unnecessary setrlimit from bpf preload.
https://git.kernel.org/bpf/bpf-next/c/1ddbddd70651
- [bpf-next,5/7] bpf: Convert bpf preload to light skeleton.
https://git.kernel.org/bpf/bpf-next/c/79b203926d18
- [bpf-next,6/7] bpf: Open code obj_get_info_by_fd in bpf preload.
https://git.kernel.org/bpf/bpf-next/c/18ef5dac934a
- [bpf-next,7/7] bpf: Drop libbpf, libelf, libz dependency from bpf preload.
https://git.kernel.org/bpf/bpf-next/c/e96f2d64c812
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 16+ messages in thread
end of thread, other threads:[~2022-02-01 23:00 UTC | newest]
Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-01-31 22:05 [PATCH bpf-next 0/7] bpf: drop libbpf from bpf preload Alexei Starovoitov
2022-01-31 22:05 ` [PATCH bpf-next 1/7] libbpf: Add support for bpf iter in light skeleton Alexei Starovoitov
2022-02-01 18:40 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 2/7] libbpf: Open code low level bpf commands Alexei Starovoitov
2022-02-01 18:52 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 3/7] libbpf: Open code raw_tp_open and link_create commands Alexei Starovoitov
2022-02-01 19:07 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 4/7] bpf: Remove unnecessary setrlimit from bpf preload Alexei Starovoitov
2022-02-01 19:09 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 5/7] bpf: Convert bpf preload to light skeleton Alexei Starovoitov
2022-02-01 19:18 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 6/7] bpf: Open code obj_get_info_by_fd in bpf preload Alexei Starovoitov
2022-02-01 19:26 ` Martin KaFai Lau
2022-01-31 22:05 ` [PATCH bpf-next 7/7] bpf: Drop libbpf, libelf, libz dependency from " Alexei Starovoitov
2022-02-01 19:27 ` Martin KaFai Lau
2022-02-01 23:00 ` [PATCH bpf-next 0/7] bpf: drop libbpf " patchwork-bot+netdevbpf
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