4 -------------------------------------------------------------------------------
5 tool for inspection and simple manipulation of eBPF progs
6 -------------------------------------------------------------------------------
13 **bpftool** [*OPTIONS*] **prog** *COMMAND*
15 *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
18 { **show** | **list** | **dump xlated** | **dump jited** | **pin** | **load**
19 | **loadall** | **help** }
24 | **bpftool** **prog { show | list }** [*PROG*]
25 | **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual** | **linum**}]
26 | **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes** | **linum**}]
27 | **bpftool** **prog pin** *PROG* *FILE*
28 | **bpftool** **prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*]
29 | **bpftool** **prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
30 | **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
31 | **bpftool** **prog tracelog**
32 | **bpftool** **prog help**
34 | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
35 | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
37 | **socket** | **kprobe** | **kretprobe** | **classifier** | **action** |
38 | **tracepoint** | **raw_tracepoint** | **xdp** | **perf_event** | **cgroup/skb** |
39 | **cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
40 | **lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
41 | **cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
42 | **cgroup/connect4** | **cgroup/connect6** | **cgroup/sendmsg4** | **cgroup/sendmsg6**
45 | **msg_verdict** | **stream_verdict** | **stream_parser** | **flow_dissector**
51 **bpftool prog { show | list }** [*PROG*]
52 Show information about loaded programs. If *PROG* is
53 specified show information only about given program, otherwise
54 list all programs currently loaded on the system.
56 Output will start with program ID followed by program type and
57 zero or more named attributes (depending on kernel version).
59 **bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** | **linum** }]
60 Dump eBPF instructions of the program from the kernel. By
61 default, eBPF will be disassembled and printed to standard
62 output in human-readable format. In this case, **opcodes**
63 controls if raw opcodes should be printed as well.
65 If **file** is specified, the binary image will instead be
68 If **visual** is specified, control flow graph (CFG) will be
69 built instead, and eBPF instructions will be presented with
70 CFG in DOT format, on standard output.
72 If the prog has line_info available, the source line will
73 be displayed by default. If **linum** is specified,
74 the filename, line number and line column will also be
75 displayed on top of the source line.
77 **bpftool prog dump jited** *PROG* [{ **file** *FILE* | **opcodes** | **linum** }]
78 Dump jited image (host machine code) of the program.
79 If *FILE* is specified image will be written to a file,
80 otherwise it will be disassembled and printed to stdout.
82 **opcodes** controls if raw opcodes will be printed.
84 If the prog has line_info available, the source line will
85 be displayed by default. If **linum** is specified,
86 the filename, line number and line column will also be
87 displayed on top of the source line.
89 **bpftool prog pin** *PROG* *FILE*
90 Pin program *PROG* as *FILE*.
92 Note: *FILE* must be located in *bpffs* mount. It must not
93 contain a dot character ('.'), which is reserved for future
94 extensions of *bpffs*.
96 **bpftool prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*] [**pinmaps** *MAP_DIR*]
97 Load bpf program(s) from binary *OBJ* and pin as *PATH*.
98 **bpftool prog load** pins only the first program from the
99 *OBJ* as *PATH*. **bpftool prog loadall** pins all programs
100 from the *OBJ* under *PATH* directory.
101 **type** is optional, if not specified program type will be
102 inferred from section names.
103 By default bpftool will create new maps as declared in the ELF
104 object being loaded. **map** parameter allows for the reuse
105 of existing maps. It can be specified multiple times, each
106 time for a different map. *IDX* refers to index of the map
107 to be replaced in the ELF file counting from 0, while *NAME*
108 allows to replace a map by name. *MAP* specifies the map to
109 use, referring to it by **id** or through a **pinned** file.
110 If **dev** *NAME* is specified program will be loaded onto
111 given networking device (offload).
112 Optional **pinmaps** argument can be provided to pin all
113 maps under *MAP_DIR* directory.
115 Note: *PATH* must be located in *bpffs* mount. It must not
116 contain a dot character ('.'), which is reserved for future
117 extensions of *bpffs*.
119 **bpftool prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
120 Attach bpf program *PROG* (with type specified by
121 *ATTACH_TYPE*). Most *ATTACH_TYPEs* require a *MAP*
122 parameter, with the exception of *flow_dissector* which is
123 attached to current networking name space.
125 **bpftool prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
126 Detach bpf program *PROG* (with type specified by
127 *ATTACH_TYPE*). Most *ATTACH_TYPEs* require a *MAP*
128 parameter, with the exception of *flow_dissector* which is
129 detached from the current networking name space.
131 **bpftool prog tracelog**
132 Dump the trace pipe of the system to the console (stdout).
133 Hit <Ctrl+C> to stop printing. BPF programs can write to this
134 trace pipe at runtime with the **bpf_trace_printk()** helper.
135 This should be used only for debugging purposes. For
136 streaming data from BPF programs to user space, one can use
137 perf events (see also **bpftool-map**\ (8)).
139 **bpftool prog help**
140 Print short help message.
145 Print short generic help message (similar to **bpftool help**).
148 Print version number (similar to **bpftool version**).
151 Generate JSON output. For commands that cannot produce JSON, this
152 option has no effect.
155 Generate human-readable JSON output. Implies **-j**.
158 When showing BPF programs, show file names of pinned
162 Allow loading maps with unknown map definitions.
165 Do not automatically attempt to mount any virtual file system
166 (such as tracefs or BPF virtual file system) when necessary.
170 **# bpftool prog show**
174 10: xdp name some_prog tag 005a3d2123620c8b gpl run_time_ns 81632 run_cnt 10
175 loaded_at 2017-09-29T20:11:00+0000 uid 0
176 xlated 528B jited 370B memlock 4096B map_ids 10
178 **# bpftool --json --pretty prog show**
185 "tag": "005a3d2123620c8b",
186 "gpl_compatible": true,
187 "run_time_ns": 81632,
189 "loaded_at": 1506715860,
194 "bytes_memlock": 4096,
201 | **# bpftool prog dump xlated id 10 file /tmp/t**
206 -rw------- 1 root root 560 Jul 22 01:42 /tmp/t
208 **# bpftool prog dump jited tag 005a3d2123620c8b**
216 4: mov %rbx,0x0(%rbp)
219 | **# mount -t bpf none /sys/fs/bpf/**
220 | **# bpftool prog pin id 10 /sys/fs/bpf/prog**
221 | **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2**
222 | **# ls -l /sys/fs/bpf/**
226 -rw------- 1 root root 0 Jul 22 01:43 prog
227 -rw------- 1 root root 0 Jul 22 01:44 prog2
229 **# bpftool prog dump jited pinned /sys/fs/bpf/prog opcodes**
241 f: mov %rbx,0x0(%rbp)
245 | **# bpftool prog load xdp1_kern.o /sys/fs/bpf/xdp1 type xdp map name rxcnt id 7**
246 | **# bpftool prog show pinned /sys/fs/bpf/xdp1**
250 9: xdp name xdp_prog1 tag 539ec6ce11b52f98 gpl
251 loaded_at 2018-06-25T16:17:31-0700 uid 0
252 xlated 488B jited 336B memlock 4096B map_ids 7
254 **# rm /sys/fs/bpf/xdp1**
259 **bpf-helpers**\ (7),
261 **bpftool-map**\ (8),
262 **bpftool-cgroup**\ (8),
263 **bpftool-feature**\ (8),
264 **bpftool-net**\ (8),
265 **bpftool-perf**\ (8)