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author | Quentin Monnet <quentin.monnet@netronome.com> | 2019-07-05 18:54:33 +0100 |
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committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-07-05 23:48:07 +0200 |
commit | ba95c7452439756d4f6dceb5a188b7c31dbbe5b6 (patch) | |
tree | 3de589eb0db88df304b599186a92a833a0d96742 /tools/bpf/bpftool/main.c | |
parent | e232cb6ff75bbfdae86e01ada24ead7528dbebe4 (diff) | |
download | linux-ba95c7452439756d4f6dceb5a188b7c31dbbe5b6.tar.gz linux-ba95c7452439756d4f6dceb5a188b7c31dbbe5b6.tar.bz2 linux-ba95c7452439756d4f6dceb5a188b7c31dbbe5b6.zip |
tools: bpftool: add "prog run" subcommand to test-run programs
Add a new "bpftool prog run" subcommand to run a loaded program on input
data (and possibly with input context) passed by the user.
Print output data (and output context if relevant) into a file or into
the console. Print return value and duration for the test run into the
console.
A "repeat" argument can be passed to run the program several times in a
row.
The command does not perform any kind of verification based on program
type (Is this program type allowed to use an input context?) or on data
consistency (Can I work with empty input data?), this is left to the
kernel.
Example invocation:
# perl -e 'print "\x0" x 14' | ./bpftool prog run \
pinned /sys/fs/bpf/sample_ret0 \
data_in - data_out - repeat 5
0000000 0000 0000 0000 0000 0000 0000 0000 | ........ ......
Return value: 0, duration (average): 260ns
When one of data_in or ctx_in is "-", bpftool reads from standard input,
in binary format. Other formats (JSON, hexdump) might be supported (via
an optional command line keyword like "data_fmt_in") in the future if
relevant, but this would require doing more parsing in bpftool.
v2:
- Fix argument names for function check_single_stdin(). (Yonghong)
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/bpf/bpftool/main.c')
-rw-r--r-- | tools/bpf/bpftool/main.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c index 4879f6395c7e..e916ff25697f 100644 --- a/tools/bpf/bpftool/main.c +++ b/tools/bpf/bpftool/main.c @@ -117,6 +117,35 @@ bool is_prefix(const char *pfx, const char *str) return !memcmp(str, pfx, strlen(pfx)); } +/* Last argument MUST be NULL pointer */ +int detect_common_prefix(const char *arg, ...) +{ + unsigned int count = 0; + const char *ref; + char msg[256]; + va_list ap; + + snprintf(msg, sizeof(msg), "ambiguous prefix: '%s' could be '", arg); + va_start(ap, arg); + while ((ref = va_arg(ap, const char *))) { + if (!is_prefix(arg, ref)) + continue; + count++; + if (count > 1) + strncat(msg, "' or '", sizeof(msg) - strlen(msg) - 1); + strncat(msg, ref, sizeof(msg) - strlen(msg) - 1); + } + va_end(ap); + strncat(msg, "'", sizeof(msg) - strlen(msg) - 1); + + if (count >= 2) { + p_err(msg); + return -1; + } + + return 0; +} + void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep) { unsigned char *data = arg; |