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This patch adds basic cgroup bpf operations to bpftool: cgroup list, attach and detach commands. Usage is described in the corresponding man pages, and examples are provided. Syntax: $ bpftool cgroup list CGROUP $ bpftool cgroup attach CGROUP ATTACH_TYPE PROG [ATTACH_FLAGS] $ bpftool cgroup detach CGROUP ATTACH_TYPE PROG Signed-off-by: Roman Gushchin <guro@fb.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jakub Kicinski <jakub.kicinski@netronome.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Quentin Monnet <quentin.monnet@netronome.com> Reviewed-by: David Ahern <dsahern@gmail.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
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* Copyright (C) 2017 Netronome Systems, Inc.
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*
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* This software is dual licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree or the BSD 2-Clause License provided below. You have the
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* option to license this software under the complete terms of either license.
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*
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* The BSD 2-Clause License:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/* Author: Jakub Kicinski <kubakici@wp.pl> */
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#ifndef __BPF_TOOL_H
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#define __BPF_TOOL_H
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/* BFD and kernel.h both define GCC_VERSION, differently */
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#undef GCC_VERSION
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#include <stdbool.h>
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#include <stdio.h>
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#include <linux/bpf.h>
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#include <linux/compiler.h>
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#include <linux/kernel.h>
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#include <linux/hashtable.h>
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#include "json_writer.h"
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#define ptr_to_u64(ptr) ((__u64)(unsigned long)(ptr))
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#define NEXT_ARG() ({ argc--; argv++; if (argc < 0) usage(); })
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#define NEXT_ARGP() ({ (*argc)--; (*argv)++; if (*argc < 0) usage(); })
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#define BAD_ARG() ({ p_err("what is '%s'?", *argv); -1; })
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#define ERR_MAX_LEN 1024
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#define BPF_TAG_FMT "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
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#define HELP_SPEC_PROGRAM \
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"PROG := { id PROG_ID | pinned FILE | tag PROG_TAG }"
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#define HELP_SPEC_OPTIONS \
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"OPTIONS := { {-j|--json} [{-p|--pretty}] | {-f|--bpffs} }"
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enum bpf_obj_type {
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BPF_OBJ_UNKNOWN,
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BPF_OBJ_PROG,
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BPF_OBJ_MAP,
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};
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extern const char *bin_name;
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extern json_writer_t *json_wtr;
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extern bool json_output;
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extern bool show_pinned;
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extern struct pinned_obj_table prog_table;
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extern struct pinned_obj_table map_table;
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void p_err(const char *fmt, ...);
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void p_info(const char *fmt, ...);
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bool is_prefix(const char *pfx, const char *str);
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void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep);
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void usage(void) __noreturn;
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struct pinned_obj_table {
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DECLARE_HASHTABLE(table, 16);
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};
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struct pinned_obj {
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__u32 id;
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char *path;
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struct hlist_node hash;
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};
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int build_pinned_obj_table(struct pinned_obj_table *table,
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enum bpf_obj_type type);
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void delete_pinned_obj_table(struct pinned_obj_table *tab);
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struct cmd {
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const char *cmd;
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int (*func)(int argc, char **argv);
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};
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int cmd_select(const struct cmd *cmds, int argc, char **argv,
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int (*help)(int argc, char **argv));
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int get_fd_type(int fd);
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const char *get_fd_type_name(enum bpf_obj_type type);
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char *get_fdinfo(int fd, const char *key);
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int open_obj_pinned(char *path);
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int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type);
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int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32));
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int do_pin_fd(int fd, const char *name);
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int do_prog(int argc, char **arg);
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int do_map(int argc, char **arg);
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int do_cgroup(int argc, char **arg);
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int prog_parse_fd(int *argc, char ***argv);
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void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes);
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void print_hex_data_json(uint8_t *data, size_t len);
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#endif
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