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