Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Alexei Starovoitov says:

====================
pull-request: bpf-next 2018-05-24

The following pull-request contains BPF updates for your *net-next* tree.

The main changes are:

1) Björn Töpel cleans up AF_XDP (removes rebind, explicit cache alignment from uapi, etc).

2) David Ahern adds mtu checks to bpf_ipv{4,6}_fib_lookup() helpers.

3) Jesper Dangaard Brouer adds bulking support to ndo_xdp_xmit.

4) Jiong Wang adds support for indirect and arithmetic shifts to NFP

5) Martin KaFai Lau cleans up BTF uapi and makes the btf_header extensible.

6) Mathieu Xhonneux adds an End.BPF action to seg6local with BPF helpers allowing
   to edit/grow/shrink a SRH and apply on a packet generic SRv6 actions.

7) Sandipan Das adds support for bpf2bpf function calls in ppc64 JIT.

8) Yonghong Song adds BPF_TASK_FD_QUERY command for introspection of tracing events.

9) other misc fixes from Gustavo A. R. Silva, Sirio Balmelli, John Fastabend, and Magnus Karlsson
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 96 insertions, 1 deletions

diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index 9bdfdf2d3fbe..39b88e760367 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -420,7 +420,11 @@ static int do_show(int argc, char **argv)
 
 static int do_dump(int argc, char **argv)
 {
+	unsigned long *func_ksyms = NULL;
 	struct bpf_prog_info info = {};
+	unsigned int *func_lens = NULL;
+	unsigned int nr_func_ksyms;
+	unsigned int nr_func_lens;
 	struct dump_data dd = {};
 	__u32 len = sizeof(info);
 	unsigned int buf_size;
@@ -496,10 +500,34 @@ static int do_dump(int argc, char **argv)
 		return -1;
 	}
 
+	nr_func_ksyms = info.nr_jited_ksyms;
+	if (nr_func_ksyms) {
+		func_ksyms = malloc(nr_func_ksyms * sizeof(__u64));
+		if (!func_ksyms) {
+			p_err("mem alloc failed");
+			close(fd);
+			goto err_free;
+		}
+	}
+
+	nr_func_lens = info.nr_jited_func_lens;
+	if (nr_func_lens) {
+		func_lens = malloc(nr_func_lens * sizeof(__u32));
+		if (!func_lens) {
+			p_err("mem alloc failed");
+			close(fd);
+			goto err_free;
+		}
+	}
+
 	memset(&info, 0, sizeof(info));
 
 	*member_ptr = ptr_to_u64(buf);
 	*member_len = buf_size;
+	info.jited_ksyms = ptr_to_u64(func_ksyms);
+	info.nr_jited_ksyms = nr_func_ksyms;
+	info.jited_func_lens = ptr_to_u64(func_lens);
+	info.nr_jited_func_lens = nr_func_lens;
 
 	err = bpf_obj_get_info_by_fd(fd, &info, &len);
 	close(fd);
@@ -513,6 +541,16 @@ static int do_dump(int argc, char **argv)
 		goto err_free;
 	}
 
+	if (info.nr_jited_ksyms > nr_func_ksyms) {
+		p_err("too many addresses returned");
+		goto err_free;
+	}
+
+	if (info.nr_jited_func_lens > nr_func_lens) {
+		p_err("too many values returned");
+		goto err_free;
+	}
+
 	if ((member_len == &info.jited_prog_len &&
 	     info.jited_prog_insns == 0) ||
 	    (member_len == &info.xlated_prog_len &&
@@ -550,7 +588,57 @@ static int do_dump(int argc, char **argv)
 				goto err_free;
 		}
 
-		disasm_print_insn(buf, *member_len, opcodes, name);
+		if (info.nr_jited_func_lens && info.jited_func_lens) {
+			struct kernel_sym *sym = NULL;
+			char sym_name[SYM_MAX_NAME];
+			unsigned char *img = buf;
+			__u64 *ksyms = NULL;
+			__u32 *lens;
+			__u32 i;
+
+			if (info.nr_jited_ksyms) {
+				kernel_syms_load(&dd);
+				ksyms = (__u64 *) info.jited_ksyms;
+			}
+
+			if (json_output)
+				jsonw_start_array(json_wtr);
+
+			lens = (__u32 *) info.jited_func_lens;
+			for (i = 0; i < info.nr_jited_func_lens; i++) {
+				if (ksyms) {
+					sym = kernel_syms_search(&dd, ksyms[i]);
+					if (sym)
+						sprintf(sym_name, "%s", sym->name);
+					else
+						sprintf(sym_name, "0x%016llx", ksyms[i]);
+				} else {
+					strcpy(sym_name, "unknown");
+				}
+
+				if (json_output) {
+					jsonw_start_object(json_wtr);
+					jsonw_name(json_wtr, "name");
+					jsonw_string(json_wtr, sym_name);
+					jsonw_name(json_wtr, "insns");
+				} else {
+					printf("%s:\n", sym_name);
+				}
+
+				disasm_print_insn(img, lens[i], opcodes, name);
+				img += lens[i];
+
+				if (json_output)
+					jsonw_end_object(json_wtr);
+				else
+					printf("\n");
+			}
+
+			if (json_output)
+				jsonw_end_array(json_wtr);
+		} else {
+			disasm_print_insn(buf, *member_len, opcodes, name);
+		}
 	} else if (visual) {
 		if (json_output)
 			jsonw_null(json_wtr);
@@ -558,6 +646,9 @@ static int do_dump(int argc, char **argv)
 			dump_xlated_cfg(buf, *member_len);
 	} else {
 		kernel_syms_load(&dd);
+		dd.nr_jited_ksyms = info.nr_jited_ksyms;
+		dd.jited_ksyms = (__u64 *) info.jited_ksyms;
+
 		if (json_output)
 			dump_xlated_json(&dd, buf, *member_len, opcodes);
 		else
@@ -566,10 +657,14 @@ static int do_dump(int argc, char **argv)
 	}
 
 	free(buf);
+	free(func_ksyms);
+	free(func_lens);
 	return 0;
 
 err_free:
 	free(buf);
+	free(func_ksyms);
+	free(func_lens);
 	return -1;
 }