1 .. SPDX-License-Identifier: (GPL-2.0-only OR B 1 .. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 2
3 ================ 3 ================
4 bpftool-prog 4 bpftool-prog
5 ================ 5 ================
6 ---------------------------------------------- 6 -------------------------------------------------------------------------------
7 tool for inspection and simple manipulation of 7 tool for inspection and simple manipulation of eBPF progs
8 ---------------------------------------------- 8 -------------------------------------------------------------------------------
9 9
10 :Manual section: 8 10 :Manual section: 8
11 11
12 .. include:: substitutions.rst 12 .. include:: substitutions.rst
13 13
14 SYNOPSIS 14 SYNOPSIS
15 ======== 15 ========
16 16
17 **bpftool** [*OPTIONS*] **prog** *COMMAND* !! 17 **bpftool** [*OPTIONS*] **prog** *COMMAND*
18 18
19 *OPTIONS* := { |COMMON_OPTIONS| | !! 19 *OPTIONS* := { |COMMON_OPTIONS| |
20 { **-f** | **--bpffs** } | { **-m** | **--mapc !! 20 { **-f** | **--bpffs** } | { **-m** | **--mapcompat** } | { **-n** | **--nomount** } |
21 { **-L** | **--use-loader** } } !! 21 { **-L** | **--use-loader** } }
22 !! 22
23 *COMMANDS* := !! 23 *COMMANDS* :=
24 { **show** | **list** | **dump xlated** | **du !! 24 { **show** | **list** | **dump xlated** | **dump jited** | **pin** | **load** |
25 **loadall** | **help** } !! 25 **loadall** | **help** }
26 26
27 PROG COMMANDS 27 PROG COMMANDS
28 ============= 28 =============
29 29
30 | **bpftool** **prog** { **show** | **list** } !! 30 | **bpftool** **prog** { **show** | **list** } [*PROG*]
31 | **bpftool** **prog dump xlated** *PROG* [{ * !! 31 | **bpftool** **prog dump xlated** *PROG* [{ **file** *FILE* | [**opcodes**] [**linum**] [**visual**] }]
32 | **bpftool** **prog dump jited** *PROG* [{ * !! 32 | **bpftool** **prog dump jited** *PROG* [{ **file** *FILE* | [**opcodes**] [**linum**] }]
33 | **bpftool** **prog pin** *PROG* *FILE* !! 33 | **bpftool** **prog pin** *PROG* *FILE*
34 | **bpftool** **prog** { **load** | **loadall* !! 34 | **bpftool** **prog** { **load** | **loadall** } *OBJ* *PATH* [**type** *TYPE*] [**map** { **idx** *IDX* | **name** *NAME* } *MAP*] [{ **offload_dev** | **xdpmeta_dev** } *NAME*] [**pinmaps** *MAP_DIR*] [**autoattach**]
35 | **bpftool** **prog attach** *PROG* *ATTACH_T !! 35 | **bpftool** **prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
36 | **bpftool** **prog detach** *PROG* *ATTACH_T !! 36 | **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
37 | **bpftool** **prog tracelog** !! 37 | **bpftool** **prog tracelog**
38 | **bpftool** **prog run** *PROG* **data_in** !! 38 | **bpftool** **prog run** *PROG* **data_in** *FILE* [**data_out** *FILE* [**data_size_out** *L*]] [**ctx_in** *FILE* [**ctx_out** *FILE* [**ctx_size_out** *M*]]] [**repeat** *N*]
39 | **bpftool** **prog profile** *PROG* [**durat !! 39 | **bpftool** **prog profile** *PROG* [**duration** *DURATION*] *METRICs*
40 | **bpftool** **prog help** !! 40 | **bpftool** **prog help**
41 | 41 |
42 | *MAP* := { **id** *MAP_ID* | **pinned** *FIL !! 42 | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
43 | *PROG* := { **id** *PROG_ID* | **pinned** *F !! 43 | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* | **name** *PROG_NAME* }
44 | *TYPE* := { !! 44 | *TYPE* := {
45 | **socket** | **kprobe** | **kretprobe** !! 45 | **socket** | **kprobe** | **kretprobe** | **classifier** | **action** |
46 | **tracepoint** | **raw_tracepoint** | ** !! 46 | **tracepoint** | **raw_tracepoint** | **xdp** | **perf_event** | **cgroup/skb** |
47 | **cgroup/sock** | **cgroup/dev** | **lwt !! 47 | **cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
48 | **lwt_seg6local** | **sockops** | **sk_s !! 48 | **lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
49 | **cgroup/bind4** | **cgroup/bind6** | ** !! 49 | **cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
50 | **cgroup/connect4** | **cgroup/connect6* !! 50 | **cgroup/connect4** | **cgroup/connect6** | **cgroup/connect_unix** |
51 | **cgroup/getpeername4** | **cgroup/getpe !! 51 | **cgroup/getpeername4** | **cgroup/getpeername6** | **cgroup/getpeername_unix** |
52 | **cgroup/getsockname4** | **cgroup/getso !! 52 | **cgroup/getsockname4** | **cgroup/getsockname6** | **cgroup/getsockname_unix** |
53 | **cgroup/sendmsg4** | **cgroup/sendmsg6* !! 53 | **cgroup/sendmsg4** | **cgroup/sendmsg6** | **cgroup/sendmsg_unix** |
54 | **cgroup/recvmsg4** | **cgroup/recvmsg6* !! 54 | **cgroup/recvmsg4** | **cgroup/recvmsg6** | **cgroup/recvmsg_unix** | **cgroup/sysctl** |
55 | **cgroup/getsockopt** | **cgroup/setsock !! 55 | **cgroup/getsockopt** | **cgroup/setsockopt** | **cgroup/sock_release** |
56 | **struct_ops** | **fentry** | **fexit** !! 56 | **struct_ops** | **fentry** | **fexit** | **freplace** | **sk_lookup**
57 | } !! 57 | }
58 | *ATTACH_TYPE* := { !! 58 | *ATTACH_TYPE* := {
59 | **sk_msg_verdict** | **sk_skb_verdict** !! 59 | **sk_msg_verdict** | **sk_skb_verdict** | **sk_skb_stream_verdict** |
60 | **sk_skb_stream_parser** | **flow_dissec !! 60 | **sk_skb_stream_parser** | **flow_dissector**
61 | } !! 61 | }
62 | *METRICs* := { !! 62 | *METRICs* := {
63 | **cycles** | **instructions** | **l1d_lo !! 63 | **cycles** | **instructions** | **l1d_loads** | **llc_misses** |
64 | **itlb_misses** | **dtlb_misses** !! 64 | **itlb_misses** | **dtlb_misses**
65 | } !! 65 | }
66 66
67 67
68 DESCRIPTION 68 DESCRIPTION
69 =========== 69 ===========
70 bpftool prog { show | list } [*PROG*] !! 70 **bpftool prog { show | list }** [*PROG*]
71 Show information about loaded programs. I !! 71 Show information about loaded programs. If *PROG* is
72 information only about given programs, oth !! 72 specified show information only about given programs,
73 currently loaded on the system. In case of !! 73 otherwise list all programs currently loaded on the system.
74 match several programs which will all be s !! 74 In case of **tag** or **name**, *PROG* may match several
75 !! 75 programs which will all be shown.
76 Output will start with program ID followed !! 76
77 named attributes (depending on kernel vers !! 77 Output will start with program ID followed by program type and
78 !! 78 zero or more named attributes (depending on kernel version).
79 Since Linux 5.1 the kernel can collect sta !! 79
80 the total time spent running the program, !! 80 Since Linux 5.1 the kernel can collect statistics on BPF
81 run). If available, bpftool shows such sta !! 81 programs (such as the total time spent running the program,
82 not collect them by defaults, as it slight !! 82 and the number of times it was run). If available, bpftool
83 program run. Activation or deactivation of !! 83 shows such statistics. However, the kernel does not collect
84 **kernel.bpf_stats_enabled** sysctl knob. !! 84 them by defaults, as it slightly impacts performance on each
85 !! 85 program run. Activation or deactivation of the feature is
86 Since Linux 5.8 bpftool is able to discove !! 86 performed via the **kernel.bpf_stats_enabled** sysctl knob.
87 that hold open file descriptors (FDs) agai !! 87
88 bpftool will automatically emit this infor !! 88 Since Linux 5.8 bpftool is able to discover information about
89 !! 89 processes that hold open file descriptors (FDs) against BPF
90 bpftool prog dump xlated *PROG* [{ file *FILE* !! 90 programs. On such kernels bpftool will automatically emit this
91 Dump eBPF instructions of the programs fro !! 91 information as well.
92 will be disassembled and printed to standa !! 92
93 format. In this case, **opcodes** controls !! 93 **bpftool prog dump xlated** *PROG* [{ **file** *FILE* | [**opcodes**] [**linum**] [**visual**] }]
94 as well. !! 94 Dump eBPF instructions of the programs from the kernel. By
95 !! 95 default, eBPF will be disassembled and printed to standard
96 In case of **tag** or **name**, *PROG* may !! 96 output in human-readable format. In this case, **opcodes**
97 will all be dumped. However, if **file** !! 97 controls if raw opcodes should be printed as well.
98 *PROG* must match a single program. !! 98
99 !! 99 In case of **tag** or **name**, *PROG* may match several
100 If **file** is specified, the binary image !! 100 programs which will all be dumped. However, if **file** or
101 *FILE*. !! 101 **visual** is specified, *PROG* must match a single program.
102 !! 102
103 If **visual** is specified, control flow g !! 103 If **file** is specified, the binary image will instead be
104 and eBPF instructions will be presented wi !! 104 written to *FILE*.
105 output. !! 105
106 !! 106 If **visual** is specified, control flow graph (CFG) will be
107 If the programs have line_info available, !! 107 built instead, and eBPF instructions will be presented with
108 displayed. If **linum** is specified, the !! 108 CFG in DOT format, on standard output.
109 column will also be displayed. !! 109
110 !! 110 If the programs have line_info available, the source line will
111 bpftool prog dump jited *PROG* [{ file *FILE* !! 111 be displayed. If **linum** is specified, the filename, line
112 Dump jited image (host machine code) of th !! 112 number and line column will also be displayed.
113 !! 113
114 If *FILE* is specified image will be writt !! 114 **bpftool prog dump jited** *PROG* [{ **file** *FILE* | [**opcodes**] [**linum**] }]
115 be disassembled and printed to stdout. *PR !! 115 Dump jited image (host machine code) of the program.
116 when **file** is specified. !! 116
117 !! 117 If *FILE* is specified image will be written to a file,
118 **opcodes** controls if raw opcodes will b !! 118 otherwise it will be disassembled and printed to stdout.
119 !! 119 *PROG* must match a single program when **file** is specified.
120 If the prog has line_info available, the s !! 120
121 **linum** is specified, the filename, line !! 121 **opcodes** controls if raw opcodes will be printed.
122 be displayed. !! 122
123 !! 123 If the prog has line_info available, the source line will
124 bpftool prog pin *PROG* *FILE* !! 124 be displayed. If **linum** is specified, the filename, line
125 Pin program *PROG* as *FILE*. !! 125 number and line column will also be displayed.
126 !! 126
127 Note: *FILE* must be located in *bpffs* mo !! 127 **bpftool prog pin** *PROG* *FILE*
128 character ('.'), which is reserved for fut !! 128 Pin program *PROG* as *FILE*.
129 !! 129
130 bpftool prog { load | loadall } *OBJ* *PATH* [ !! 130 Note: *FILE* must be located in *bpffs* mount. It must not
131 Load bpf program(s) from binary *OBJ* and !! 131 contain a dot character ('.'), which is reserved for future
132 load** pins only the first program from th !! 132 extensions of *bpffs*.
133 loadall** pins all programs from the *OBJ* !! 133
134 is optional, if not specified program type !! 134 **bpftool prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** { **idx** *IDX* | **name** *NAME* } *MAP*] [{ **offload_dev** | **xdpmeta_dev** } *NAME*] [**pinmaps** *MAP_DIR*] [**autoattach**]
135 names. By default bpftool will create new !! 135 Load bpf program(s) from binary *OBJ* and pin as *PATH*.
136 object being loaded. **map** parameter al !! 136 **bpftool prog load** pins only the first program from the
137 maps. It can be specified multiple times, !! 137 *OBJ* as *PATH*. **bpftool prog loadall** pins all programs
138 *IDX* refers to index of the map to be rep !! 138 from the *OBJ* under *PATH* directory.
139 from 0, while *NAME* allows to replace a m !! 139 **type** is optional, if not specified program type will be
140 map to use, referring to it by **id** or t !! 140 inferred from section names.
141 **offload_dev** *NAME* is specified progra !! 141 By default bpftool will create new maps as declared in the ELF
142 networking device (offload). If **xdpmeta_ !! 142 object being loaded. **map** parameter allows for the reuse
143 will become device-bound without offloadin !! 143 of existing maps. It can be specified multiple times, each
144 metadata. Optional **pinmaps** argument ca !! 144 time for a different map. *IDX* refers to index of the map
145 under *MAP_DIR* directory. !! 145 to be replaced in the ELF file counting from 0, while *NAME*
146 !! 146 allows to replace a map by name. *MAP* specifies the map to
147 If **autoattach** is specified program wil !! 147 use, referring to it by **id** or through a **pinned** file.
148 case, only the link (representing the prog !! 148 If **offload_dev** *NAME* is specified program will be loaded
149 pinned, not the program as such, so the pa !! 149 onto given networking device (offload).
150 show -f**, only show in **bpftool link sho !! 150 If **xdpmeta_dev** *NAME* is specified program will become
151 when bpftool (libbpf) is able to infer all !! 151 device-bound without offloading, this facilitates access
152 object file, in particular, it's not suppo !! 152 to XDP metadata.
153 program does not support autoattach, bpfto !! 153 Optional **pinmaps** argument can be provided to pin all
154 for that program instead. !! 154 maps under *MAP_DIR* directory.
155 !! 155
156 Note: *PATH* must be located in *bpffs* mo !! 156 If **autoattach** is specified program will be attached
157 character ('.'), which is reserved for fut !! 157 before pin. In that case, only the link (representing the
158 !! 158 program attached to its hook) is pinned, not the program as
159 bpftool prog attach *PROG* *ATTACH_TYPE* [*MAP !! 159 such, so the path won't show in **bpftool prog show -f**,
160 Attach bpf program *PROG* (with type speci !! 160 only show in **bpftool link show -f**. Also, this only works
161 *ATTACH_TYPEs* require a *MAP* parameter, !! 161 when bpftool (libbpf) is able to infer all necessary
162 *flow_dissector* which is attached to curr !! 162 information from the object file, in particular, it's not
163 !! 163 supported for all program types. If a program does not
164 bpftool prog detach *PROG* *ATTACH_TYPE* [*MAP !! 164 support autoattach, bpftool falls back to regular pinning
165 Detach bpf program *PROG* (with type speci !! 165 for that program instead.
166 *ATTACH_TYPEs* require a *MAP* parameter, !! 166
167 *flow_dissector* which is detached from th !! 167 Note: *PATH* must be located in *bpffs* mount. It must not
168 !! 168 contain a dot character ('.'), which is reserved for future
169 bpftool prog tracelog !! 169 extensions of *bpffs*.
170 Dump the trace pipe of the system to the c !! 170
171 stop printing. BPF programs can write to t !! 171 **bpftool prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
172 the **bpf_trace_printk**\ () helper. This !! 172 Attach bpf program *PROG* (with type specified by
173 purposes. For streaming data from BPF prog !! 173 *ATTACH_TYPE*). Most *ATTACH_TYPEs* require a *MAP*
174 perf events (see also **bpftool-map**\ (8) !! 174 parameter, with the exception of *flow_dissector* which is
175 !! 175 attached to current networking name space.
176 bpftool prog run *PROG* data_in *FILE* [data_o !! 176
177 Run BPF program *PROG* in the kernel testi !! 177 **bpftool prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
178 meaning that the program works on the data !! 178 Detach bpf program *PROG* (with type specified by
179 user, and not on actual packets or monitor !! 179 *ATTACH_TYPE*). Most *ATTACH_TYPEs* require a *MAP*
180 and duration for the test run are printed !! 180 parameter, with the exception of *flow_dissector* which is
181 !! 181 detached from the current networking name space.
182 Input data is read from the *FILE* passed !! 182
183 is "**-**", input data is read from standa !! 183 **bpftool prog tracelog**
184 is read from *FILE* passed with **ctx_in** !! 184 Dump the trace pipe of the system to the console (stdout).
185 read from standard input, but only if stan !! 185 Hit <Ctrl+C> to stop printing. BPF programs can write to this
186 for input data. If a *FILE* is passed with !! 186 trace pipe at runtime with the **bpf_trace_printk**\ () helper.
187 written to that file. Similarly, output co !! 187 This should be used only for debugging purposes. For
188 passed with **ctx_out**. For both output f !! 188 streaming data from BPF programs to user space, one can use
189 print to the standard output (as plain tex !! 189 perf events (see also **bpftool-map**\ (8)).
190 passed). If output keywords are omitted, o !! 190
191 discarded. Keywords **data_size_out** and !! 191 **bpftool prog run** *PROG* **data_in** *FILE* [**data_out** *FILE* [**data_size_out** *L*]] [**ctx_in** *FILE* [**ctx_out** *FILE* [**ctx_size_out** *M*]]] [**repeat** *N*]
192 the size (in bytes) for the output buffers !! 192 Run BPF program *PROG* in the kernel testing infrastructure
193 default of 32 kB should be more than enoug !! 193 for BPF, meaning that the program works on the data and
194 !! 194 context provided by the user, and not on actual packets or
195 Keyword **repeat** is used to indicate the !! 195 monitored functions etc. Return value and duration for the
196 perform. Note that output data and context !! 196 test run are printed out to the console.
197 the last of those runs. The duration print !! 197
198 an average over all runs performed by the !! 198 Input data is read from the *FILE* passed with **data_in**.
199 !! 199 If this *FILE* is "**-**", input data is read from standard
200 Not all program types support test run. Am !! 200 input. Input context, if any, is read from *FILE* passed with
201 them can take the **ctx_in**/**ctx_out** a !! 201 **ctx_in**. Again, "**-**" can be used to read from standard
202 perform checks on program types. !! 202 input, but only if standard input is not already in use for
203 !! 203 input data. If a *FILE* is passed with **data_out**, output
204 bpftool prog profile *PROG* [duration *DURATIO !! 204 data is written to that file. Similarly, output context is
205 Profile *METRICs* for bpf program *PROG* f !! 205 written to the *FILE* passed with **ctx_out**. For both
206 user hits <Ctrl+C>. *DURATION* is optional !! 206 output flows, "**-**" can be used to print to the standard
207 the profiling will run up to **UINT_MAX** !! 207 output (as plain text, or JSON if relevant option was
>> 208 passed). If output keywords are omitted, output data and
>> 209 context are discarded. Keywords **data_size_out** and
>> 210 **ctx_size_out** are used to pass the size (in bytes) for the
>> 211 output buffers to the kernel, although the default of 32 kB
>> 212 should be more than enough for most cases.
>> 213
>> 214 Keyword **repeat** is used to indicate the number of
>> 215 consecutive runs to perform. Note that output data and
>> 216 context printed to files correspond to the last of those
>> 217 runs. The duration printed out at the end of the runs is an
>> 218 average over all runs performed by the command.
>> 219
>> 220 Not all program types support test run. Among those which do,
>> 221 not all of them can take the **ctx_in**/**ctx_out**
>> 222 arguments. bpftool does not perform checks on program types.
>> 223
>> 224 **bpftool prog profile** *PROG* [**duration** *DURATION*] *METRICs*
>> 225 Profile *METRICs* for bpf program *PROG* for *DURATION*
>> 226 seconds or until user hits <Ctrl+C>. *DURATION* is optional.
>> 227 If *DURATION* is not specified, the profiling will run up to
>> 228 **UINT_MAX** seconds.
208 229
209 bpftool prog help !! 230 **bpftool prog help**
210 Print short help message. !! 231 Print short help message.
211 232
212 OPTIONS 233 OPTIONS
213 ======= 234 =======
214 .. include:: common_options.rst !! 235 .. include:: common_options.rst
215 236
216 -f, --bpffs !! 237 -f, --bpffs
217 When showing BPF programs, show file names !! 238 When showing BPF programs, show file names of pinned
218 !! 239 programs.
219 -m, --mapcompat !! 240
220 Allow loading maps with unknown map defini !! 241 -m, --mapcompat
221 !! 242 Allow loading maps with unknown map definitions.
222 -n, --nomount !! 243
223 Do not automatically attempt to mount any !! 244 -n, --nomount
224 tracefs or BPF virtual file system) when n !! 245 Do not automatically attempt to mount any virtual file system
225 !! 246 (such as tracefs or BPF virtual file system) when necessary.
226 -L, --use-loader !! 247
227 Load program as a "loader" program. This i !! 248 -L, --use-loader
228 of such programs. When this option is in u !! 249 Load program as a "loader" program. This is useful to debug
229 programs from the object file into the ker !! 250 the generation of such programs. When this option is in
230 (therefore, the *PATH* must not be provide !! 251 use, bpftool attempts to load the programs from the object
231 !! 252 file into the kernel, but does not pin them (therefore, the
232 When combined with the **-d**\ \|\ **--deb !! 253 *PATH* must not be provided).
233 messages are generated, and the execution !! 254
234 the **bpf_trace_printk**\ () helper to log !! 255 When combined with the **-d**\ \|\ **--debug** option,
235 creating the maps, and loading the program !! 256 additional debug messages are generated, and the execution
236 as a way to dump those messages). !! 257 of the loader program will use the **bpf_trace_printk**\ ()
>> 258 helper to log each step of loading BTF, creating the maps,
>> 259 and loading the programs (see **bpftool prog tracelog** as
>> 260 a way to dump those messages).
237 261
238 EXAMPLES 262 EXAMPLES
239 ======== 263 ========
240 **# bpftool prog show** 264 **# bpftool prog show**
241 265
242 :: 266 ::
243 267
244 10: xdp name some_prog tag 005a3d2123620 268 10: xdp name some_prog tag 005a3d2123620c8b gpl run_time_ns 81632 run_cnt 10
245 loaded_at 2017-09-29T20:11:00+0000 269 loaded_at 2017-09-29T20:11:00+0000 uid 0
246 xlated 528B jited 370B memlock 4 270 xlated 528B jited 370B memlock 4096B map_ids 10
247 pids systemd(1) 271 pids systemd(1)
248 272
249 **# bpftool --json --pretty prog show** 273 **# bpftool --json --pretty prog show**
250 274
251 :: 275 ::
252 276
253 [{ 277 [{
254 "id": 10, 278 "id": 10,
255 "type": "xdp", 279 "type": "xdp",
256 "tag": "005a3d2123620c8b", 280 "tag": "005a3d2123620c8b",
257 "gpl_compatible": true, 281 "gpl_compatible": true,
258 "run_time_ns": 81632, 282 "run_time_ns": 81632,
259 "run_cnt": 10, 283 "run_cnt": 10,
260 "loaded_at": 1506715860, 284 "loaded_at": 1506715860,
261 "uid": 0, 285 "uid": 0,
262 "bytes_xlated": 528, 286 "bytes_xlated": 528,
263 "jited": true, 287 "jited": true,
264 "bytes_jited": 370, 288 "bytes_jited": 370,
265 "bytes_memlock": 4096, 289 "bytes_memlock": 4096,
266 "map_ids": [10 290 "map_ids": [10
267 ], 291 ],
268 "pids": [{ 292 "pids": [{
269 "pid": 1, 293 "pid": 1,
270 "comm": "systemd" 294 "comm": "systemd"
271 } 295 }
272 ] 296 ]
273 } 297 }
274 ] 298 ]
275 299
276 | 300 |
277 | **# bpftool prog dump xlated id 10 file /tmp 301 | **# bpftool prog dump xlated id 10 file /tmp/t**
278 | **$ ls -l /tmp/t** 302 | **$ ls -l /tmp/t**
279 303
280 :: 304 ::
281 305
282 -rw------- 1 root root 560 Jul 22 01:42 /t 306 -rw------- 1 root root 560 Jul 22 01:42 /tmp/t
283 307
284 **# bpftool prog dump jited tag 005a3d2123620c 308 **# bpftool prog dump jited tag 005a3d2123620c8b**
285 309
286 :: 310 ::
287 311
288 0: push %rbp 312 0: push %rbp
289 1: mov %rsp,%rbp 313 1: mov %rsp,%rbp
290 2: sub $0x228,%rsp 314 2: sub $0x228,%rsp
291 3: sub $0x28,%rbp 315 3: sub $0x28,%rbp
292 4: mov %rbx,0x0(%rbp) 316 4: mov %rbx,0x0(%rbp)
293 317
294 | 318 |
295 | **# mount -t bpf none /sys/fs/bpf/** 319 | **# mount -t bpf none /sys/fs/bpf/**
296 | **# bpftool prog pin id 10 /sys/fs/bpf/prog* 320 | **# bpftool prog pin id 10 /sys/fs/bpf/prog**
297 | **# bpftool prog load ./my_prog.o /sys/fs/bp 321 | **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2**
298 | **# ls -l /sys/fs/bpf/** 322 | **# ls -l /sys/fs/bpf/**
299 323
300 :: 324 ::
301 325
302 -rw------- 1 root root 0 Jul 22 01:43 prog 326 -rw------- 1 root root 0 Jul 22 01:43 prog
303 -rw------- 1 root root 0 Jul 22 01:44 prog 327 -rw------- 1 root root 0 Jul 22 01:44 prog2
304 328
305 **# bpftool prog dump jited pinned /sys/fs/bpf 329 **# bpftool prog dump jited pinned /sys/fs/bpf/prog opcodes**
306 330
307 :: 331 ::
308 332
309 0: push %rbp 333 0: push %rbp
310 55 334 55
311 1: mov %rsp,%rbp 335 1: mov %rsp,%rbp
312 48 89 e5 336 48 89 e5
313 4: sub $0x228,%rsp 337 4: sub $0x228,%rsp
314 48 81 ec 28 02 00 00 338 48 81 ec 28 02 00 00
315 b: sub $0x28,%rbp 339 b: sub $0x28,%rbp
316 48 83 ed 28 340 48 83 ed 28
317 f: mov %rbx,0x0(%rbp) 341 f: mov %rbx,0x0(%rbp)
318 48 89 5d 00 342 48 89 5d 00
319 343
320 | 344 |
321 | **# bpftool prog load xdp1_kern.o /sys/fs/bp 345 | **# bpftool prog load xdp1_kern.o /sys/fs/bpf/xdp1 type xdp map name rxcnt id 7**
322 | **# bpftool prog show pinned /sys/fs/bpf/xdp 346 | **# bpftool prog show pinned /sys/fs/bpf/xdp1**
323 347
324 :: 348 ::
325 349
326 9: xdp name xdp_prog1 tag 539ec6ce11b52f 350 9: xdp name xdp_prog1 tag 539ec6ce11b52f98 gpl
327 loaded_at 2018-06-25T16:17:31-0700 351 loaded_at 2018-06-25T16:17:31-0700 uid 0
328 xlated 488B jited 336B memlock 4 352 xlated 488B jited 336B memlock 4096B map_ids 7
329 353
330 **# rm /sys/fs/bpf/xdp1** 354 **# rm /sys/fs/bpf/xdp1**
331 355
332 | 356 |
333 | **# bpftool prog profile id 337 duration 10 357 | **# bpftool prog profile id 337 duration 10 cycles instructions llc_misses**
334 358
335 :: 359 ::
336 360
337 51397 run_cnt 361 51397 run_cnt
338 40176203 cycles 362 40176203 cycles (83.05%)
339 42518139 instructions # 1.06 insns 363 42518139 instructions # 1.06 insns per cycle (83.39%)
340 123 llc_misses # 2.89 LLC mi 364 123 llc_misses # 2.89 LLC misses per million insns (83.15%)
341 365
342 | 366 |
343 | Output below is for the trace logs. 367 | Output below is for the trace logs.
344 | Run in separate terminals: 368 | Run in separate terminals:
345 | **# bpftool prog tracelog** 369 | **# bpftool prog tracelog**
346 | **# bpftool prog load -L -d file.o** 370 | **# bpftool prog load -L -d file.o**
347 371
348 :: 372 ::
349 373
350 bpftool-620059 [004] d... 2634685.517903: 374 bpftool-620059 [004] d... 2634685.517903: bpf_trace_printk: btf_load size 665 r=5
351 bpftool-620059 [004] d... 2634685.517912: 375 bpftool-620059 [004] d... 2634685.517912: bpf_trace_printk: map_create sample_map idx 0 type 2 value_size 4 value_btf_id 0 r=6
352 bpftool-620059 [004] d... 2634685.517997: 376 bpftool-620059 [004] d... 2634685.517997: bpf_trace_printk: prog_load sample insn_cnt 13 r=7
353 bpftool-620059 [004] d... 2634685.517999: 377 bpftool-620059 [004] d... 2634685.517999: bpf_trace_printk: close(5) = 0
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