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** | **help** }
23 | **bpftool** **prog { show | list }** [*PROG*]
24 | **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual**}]
25 | **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes**}]
26 | **bpftool** **prog pin** *PROG* *FILE*
27 | **bpftool** **prog load** *OBJ* *FILE* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*]
28 | **bpftool** **prog attach** *PROG* *ATTACH_TYPE* *MAP*
29 | **bpftool** **prog detach** *PROG* *ATTACH_TYPE* *MAP*
30 | **bpftool** **prog help**
32 | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
33 | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
35 | **socket** | **kprobe** | **kretprobe** | **classifier** | **action** |
36 | **tracepoint** | **raw_tracepoint** | **xdp** | **perf_event** | **cgroup/skb** |
37 | **cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
38 | **lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
39 | **cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
40 | **cgroup/connect4** | **cgroup/connect6** | **cgroup/sendmsg4** | **cgroup/sendmsg6**
42 | *ATTACH_TYPE* := { **msg_verdict** | **skb_verdict** | **skb_parse** }
47 **bpftool prog { show | list }** [*PROG*]
48 Show information about loaded programs. If *PROG* is
49 specified show information only about given program, otherwise
50 list all programs currently loaded on the system.
52 Output will start with program ID followed by program type and
53 zero or more named attributes (depending on kernel version).
55 **bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** }]
56 Dump eBPF instructions of the program from the kernel. By
57 default, eBPF will be disassembled and printed to standard
58 output in human-readable format. In this case, **opcodes**
59 controls if raw opcodes should be printed as well.
61 If **file** is specified, the binary image will instead be
64 If **visual** is specified, control flow graph (CFG) will be
65 built instead, and eBPF instructions will be presented with
66 CFG in DOT format, on standard output.
68 **bpftool prog dump jited** *PROG* [{ **file** *FILE* | **opcodes** }]
69 Dump jited image (host machine code) of the program.
70 If *FILE* is specified image will be written to a file,
71 otherwise it will be disassembled and printed to stdout.
73 **opcodes** controls if raw opcodes will be printed.
75 **bpftool prog pin** *PROG* *FILE*
76 Pin program *PROG* as *FILE*.
78 Note: *FILE* must be located in *bpffs* mount. It must not
79 contain a dot character ('.'), which is reserved for future
80 extensions of *bpffs*.
82 **bpftool prog load** *OBJ* *FILE* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*]
83 Load bpf program from binary *OBJ* and pin as *FILE*.
84 **type** is optional, if not specified program type will be
85 inferred from section names.
86 By default bpftool will create new maps as declared in the ELF
87 object being loaded. **map** parameter allows for the reuse
88 of existing maps. It can be specified multiple times, each
89 time for a different map. *IDX* refers to index of the map
90 to be replaced in the ELF file counting from 0, while *NAME*
91 allows to replace a map by name. *MAP* specifies the map to
92 use, referring to it by **id** or through a **pinned** file.
93 If **dev** *NAME* is specified program will be loaded onto
94 given networking device (offload).
96 Note: *FILE* must be located in *bpffs* mount. It must not
97 contain a dot character ('.'), which is reserved for future
98 extensions of *bpffs*.
100 **bpftool prog attach** *PROG* *ATTACH_TYPE* *MAP*
101 Attach bpf program *PROG* (with type specified by *ATTACH_TYPE*)
104 **bpftool prog detach** *PROG* *ATTACH_TYPE* *MAP*
105 Detach bpf program *PROG* (with type specified by *ATTACH_TYPE*)
108 **bpftool prog help**
109 Print short help message.
114 Print short generic help message (similar to **bpftool help**).
117 Print version number (similar to **bpftool version**).
120 Generate JSON output. For commands that cannot produce JSON, this
121 option has no effect.
124 Generate human-readable JSON output. Implies **-j**.
127 When showing BPF programs, show file names of pinned
132 **# bpftool prog show**
135 10: xdp name some_prog tag 005a3d2123620c8b gpl
136 loaded_at Sep 29/20:11 uid 0
137 xlated 528B jited 370B memlock 4096B map_ids 10
139 **# bpftool --json --pretty prog show**
147 "tag": "005a3d2123620c8b",
148 "gpl_compatible": true,
149 "loaded_at": "Sep 29/20:11",
154 "bytes_memlock": 4096,
162 | **# bpftool prog dump xlated id 10 file /tmp/t**
164 | -rw------- 1 root root 560 Jul 22 01:42 /tmp/t
166 **# bpftool prog dum jited tag 005a3d2123620c8b**
177 | **# mount -t bpf none /sys/fs/bpf/**
178 | **# bpftool prog pin id 10 /sys/fs/bpf/prog**
179 | **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2**
180 | **# ls -l /sys/fs/bpf/**
181 | -rw------- 1 root root 0 Jul 22 01:43 prog
182 | -rw------- 1 root root 0 Jul 22 01:44 prog2
184 **# bpftool prog dum jited pinned /sys/fs/bpf/prog opcodes**
200 | **# bpftool prog load xdp1_kern.o /sys/fs/bpf/xdp1 type xdp map name rxcnt id 7**
201 | **# bpftool prog show pinned /sys/fs/bpf/xdp1**
202 | 9: xdp name xdp_prog1 tag 539ec6ce11b52f98 gpl
203 | loaded_at 2018-06-25T16:17:31-0700 uid 0
204 | xlated 488B jited 336B memlock 4096B map_ids 7
205 | **# rm /sys/fs/bpf/xdp1**
211 **bpf-helpers**\ (7),
213 **bpftool-map**\ (8),
214 **bpftool-cgroup**\ (8),
215 **bpftool-net**\ (8),
216 **bpftool-perf**\ (8)