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Commit a8e8c0ec authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'bpftool-add-a-version-command-and-fix-several-items' 



Jakub Kicinski says:

====================
tools: bpftool: add a "version" command, and fix several items

Quentin says:

The first seven patches of this series bring several minor fixes to
bpftool. Please see individual commit logs for details.

Last patch adds a "version" commands to bpftool, which is in fact the
version of the kernel from which it was compiled.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents f3ae608e 821cfbb0

tools/bpf/bpftool/Documentation/bpftool-prog.rst

+4 −4
Original line number Diff line number Diff line
@@ -11,8 +11,8 @@ SYNOPSIS 
========



|	**bpftool** prog show [*PROG*]

|	**bpftool** prog dump xlated *PROG* [file *FILE*] [opcodes]

|	**bpftool** prog dump jited  *PROG* [file *FILE*] [opcodes]

|	**bpftool** prog dump xlated *PROG* [{file *FILE* | opcodes }]

|	**bpftool** prog dump jited  *PROG* [{file *FILE* | opcodes }]

|	**bpftool** prog pin *PROG* *FILE*

|	**bpftool** prog help

|
@@ -28,14 +28,14 @@ DESCRIPTION 
		  Output will start with program ID followed by program type and

		  zero or more named attributes (depending on kernel version).



	**bpftool prog dump xlated** *PROG* [**file** *FILE*] [**opcodes**]

	**bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** }]

		  Dump eBPF instructions of the program from the kernel.

		  If *FILE* is specified image will be written to a file,

		  otherwise it will be disassembled and printed to stdout.



		  **opcodes** controls if raw opcodes will be printed.



	**bpftool prog dump jited**  *PROG* [**file** *FILE*] [**opcodes**]

	**bpftool prog dump jited**  *PROG* [{ **file** *FILE* | **opcodes** }]

		  Dump jited image (host machine code) of the program.

		  If *FILE* is specified image will be written to a file,

		  otherwise it will be disassembled and printed to stdout.

tools/bpf/bpftool/Documentation/bpftool.rst

+2 −0
Original line number Diff line number Diff line
@@ -14,6 +14,8 @@ SYNOPSIS 


	**bpftool** batch file *FILE*



	**bpftool** version



	*OBJECT* := { **map** | **program** }



	*MAP-COMMANDS* :=

tools/bpf/bpftool/main.c

+17 −5
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ 
#include <ctype.h>

#include <errno.h>

#include <linux/bpf.h>

#include <linux/version.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>
@@ -62,13 +63,23 @@ static int do_help(int argc, char **argv) 
	fprintf(stderr,

		"Usage: %s OBJECT { COMMAND | help }\n"

		"       %s batch file FILE\n"

		"       %s version\n"

		"\n"

		"       OBJECT := { prog | map }\n",

		bin_name, bin_name);

		bin_name, bin_name, bin_name);



	return 0;

}



static int do_version(int argc, char **argv)

{

	printf("%s v%d.%d.%d\n", bin_name,

	       LINUX_VERSION_CODE >> 16,

	       LINUX_VERSION_CODE >> 8 & 0xf,

	       LINUX_VERSION_CODE & 0xf);

	return 0;

}



int cmd_select(const struct cmd *cmds, int argc, char **argv,

	       int (*help)(int argc, char **argv))

{
@@ -100,7 +111,7 @@ bool is_prefix(const char *pfx, const char *str) 
	return !memcmp(str, pfx, strlen(pfx));

}



void print_hex(void *arg, unsigned int n, const char *sep)

void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep)

{

	unsigned char *data = arg;

	unsigned int i;
@@ -111,13 +122,13 @@ void print_hex(void *arg, unsigned int n, const char *sep) 
		if (!i)

			/* nothing */;

		else if (!(i % 16))

			printf("\n");

			fprintf(f, "\n");

		else if (!(i % 8))

			printf("  ");

			fprintf(f, "  ");

		else

			pfx = sep;



		printf("%s%02hhx", i ? pfx : "", data[i]);

		fprintf(f, "%s%02hhx", i ? pfx : "", data[i]);

	}

}
@@ -128,6 +139,7 @@ static const struct cmd cmds[] = { 
	{ "batch",	do_batch },

	{ "prog",	do_prog },

	{ "map",	do_map },

	{ "version",	do_version },

	{ 0 }

};

tools/bpf/bpftool/main.h

+1 −1
Original line number Diff line number Diff line
@@ -67,7 +67,7 @@ enum bpf_obj_type { 
extern const char *bin_name;



bool is_prefix(const char *pfx, const char *str);

void print_hex(void *arg, unsigned int n, const char *sep);

void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep);

void usage(void) __attribute__((noreturn));



struct cmd {

tools/bpf/bpftool/map.c

+11 −11
Original line number Diff line number Diff line
@@ -216,12 +216,12 @@ static void print_entry(struct bpf_map_info *info, unsigned char *key, 
			!break_names;



		printf("key:%c", break_names ? '\n' : ' ');

		print_hex(key, info->key_size, " ");

		fprint_hex(stdout, key, info->key_size, " ");



		printf(single_line ? "  " : "\n");



		printf("value:%c", break_names ? '\n' : ' ');

		print_hex(value, info->value_size, " ");

		fprint_hex(stdout, value, info->value_size, " ");



		printf("\n");

	} else {
@@ -230,12 +230,12 @@ static void print_entry(struct bpf_map_info *info, unsigned char *key, 
		n = get_possible_cpus();



		printf("key:\n");

		print_hex(key, info->key_size, " ");

		fprint_hex(stdout, key, info->key_size, " ");

		printf("\n");

		for (i = 0; i < n; i++) {

			printf("value (CPU %02d):%c",

			       i, info->value_size > 16 ? '\n' : ' ');

			print_hex(value + i * info->value_size,

			fprint_hex(stdout, value + i * info->value_size,

				   info->value_size, " ");

			printf("\n");

		}
@@ -252,7 +252,7 @@ static char **parse_bytes(char **argv, const char *name, unsigned char *val, 
		val[i] = strtoul(argv[i], &endptr, 0);

		if (*endptr) {

			err("error parsing byte: %s\n", argv[i]);

			break;

			return NULL;

		}

		i++;

	}
@@ -492,8 +492,8 @@ static int do_dump(int argc, char **argv) 
			print_entry(&info, key, value);

		} else {

			info("can't lookup element with key: ");

			print_hex(key, info.key_size, " ");

			printf("\n");

			fprint_hex(stderr, key, info.key_size, " ");

			fprintf(stderr, "\n");

		}



		prev_key = key;
@@ -587,7 +587,7 @@ static int do_lookup(int argc, char **argv) 
		print_entry(&info, key, value);

	} else if (errno == ENOENT) {

		printf("key:\n");

		print_hex(key, info.key_size, " ");

		fprint_hex(stdout, key, info.key_size, " ");

		printf("\n\nNot found\n");

	} else {

		err("lookup failed: %s\n", strerror(errno));
@@ -642,14 +642,14 @@ static int do_getnext(int argc, char **argv) 


	if (key) {

		printf("key:\n");

		print_hex(key, info.key_size, " ");

		fprint_hex(stdout, key, info.key_size, " ");

		printf("\n");

	} else {

		printf("key: None\n");

	}



	printf("next key:\n");

	print_hex(nextkey, info.key_size, " ");

	fprint_hex(stdout, nextkey, info.key_size, " ");

	printf("\n");



exit_free: