diff options
author | David Ahern <dsahern@gmail.com> | 2017-09-01 00:05:47 +0200 |
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committer | David S. Miller <davem@davemloft.net> | 2017-09-01 07:05:15 +0200 |
commit | 609b1c32752de65134a4e4e2ceb3933790463723 (patch) | |
tree | 04a953833fc56b6e1f0310425d70f9c7bb37631d /samples/bpf/test_cgrp2_sock.c | |
parent | samples/bpf: Update sock test to allow setting mark and priority (diff) | |
download | linux-609b1c32752de65134a4e4e2ceb3933790463723.tar.xz linux-609b1c32752de65134a4e4e2ceb3933790463723.zip |
samples/bpf: Add detach option to test_cgrp2_sock
Add option to detach programs from a cgroup.
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/test_cgrp2_sock.c')
-rw-r--r-- | samples/bpf/test_cgrp2_sock.c | 50 |
1 files changed, 35 insertions, 15 deletions
diff --git a/samples/bpf/test_cgrp2_sock.c b/samples/bpf/test_cgrp2_sock.c index 681abbe6c85e..15396761c5cc 100644 --- a/samples/bpf/test_cgrp2_sock.c +++ b/samples/bpf/test_cgrp2_sock.c @@ -114,7 +114,12 @@ static int prog_load(__u32 idx, __u32 mark, __u32 prio) static int usage(const char *argv0) { - printf("Usage: %s -b bind-to-dev -m mark -p prio cg-path\n", argv0); + printf("Usage:\n"); + printf(" Attach a program\n"); + printf(" %s -b bind-to-dev -m mark -p prio cg-path\n", argv0); + printf("\n"); + printf(" Detach a program\n"); + printf(" %s -d cg-path\n", argv0); return EXIT_FAILURE; } @@ -123,10 +128,14 @@ int main(int argc, char **argv) __u32 idx = 0, mark = 0, prio = 0; const char *cgrp_path = NULL; int cg_fd, prog_fd, ret; + int do_attach = 1; int rc; - while ((rc = getopt(argc, argv, "b:m:p:")) != -1) { + while ((rc = getopt(argc, argv, "db:m:p:")) != -1) { switch (rc) { + case 'd': + do_attach = 0; + break; case 'b': idx = if_nametoindex(optarg); if (!idx) { @@ -157,7 +166,7 @@ int main(int argc, char **argv) return EXIT_FAILURE; } - if (!idx && !mark && !prio) { + if (do_attach && !idx && !mark && !prio) { fprintf(stderr, "One of device, mark or priority must be given\n"); return EXIT_FAILURE; @@ -169,20 +178,31 @@ int main(int argc, char **argv) return EXIT_FAILURE; } - prog_fd = prog_load(idx, mark, prio); - if (prog_fd < 0) { - printf("Failed to load prog: '%s'\n", strerror(errno)); - printf("Output from kernel verifier:\n%s\n-------\n", - bpf_log_buf); - return EXIT_FAILURE; - } + if (do_attach) { + prog_fd = prog_load(idx, mark, prio); + if (prog_fd < 0) { + printf("Failed to load prog: '%s'\n", strerror(errno)); + printf("Output from kernel verifier:\n%s\n-------\n", + bpf_log_buf); + return EXIT_FAILURE; + } - ret = bpf_prog_attach(prog_fd, cg_fd, BPF_CGROUP_INET_SOCK_CREATE, 0); - if (ret < 0) { - printf("Failed to attach prog to cgroup: '%s'\n", - strerror(errno)); - return EXIT_FAILURE; + ret = bpf_prog_attach(prog_fd, cg_fd, + BPF_CGROUP_INET_SOCK_CREATE, 0); + if (ret < 0) { + printf("Failed to attach prog to cgroup: '%s'\n", + strerror(errno)); + return EXIT_FAILURE; + } + } else { + ret = bpf_prog_detach(cg_fd, BPF_CGROUP_INET_SOCK_CREATE); + if (ret < 0) { + printf("Failed to detach prog from cgroup: '%s'\n", + strerror(errno)); + return EXIT_FAILURE; + } } + close(cg_fd); return EXIT_SUCCESS; } |