/* eBPF example program: * * - Creates arraymap in kernel with 4 bytes keys and 8 byte values * * - Loads eBPF program * * The eBPF program accesses the map passed in to store two pieces of * information. The number of invocations of the program, which maps * to the number of packets received, is stored to key 0. Key 1 is * incremented on each iteration by the number of bytes stored in * the skb. * * - Attaches the new program to a cgroup using BPF_PROG_ATTACH * * - Every second, reads map[0] and map[1] to see how many bytes and * packets were seen on any socket of tasks in the given cgroup. */ #define _GNU_SOURCE #include #include #include #include #include #include "libbpf.h" #include "cgroup_helpers.h" #define FOO "/foo" #define BAR "/foo/bar/" #define PING_CMD "ping -c1 -w1 127.0.0.1" char bpf_log_buf[BPF_LOG_BUF_SIZE]; static int prog_load(int verdict) { int ret; struct bpf_insn prog[] = { BPF_MOV64_IMM(BPF_REG_0, verdict), /* r0 = verdict */ BPF_EXIT_INSN(), }; size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn); ret = bpf_load_program(BPF_PROG_TYPE_CGROUP_SKB, prog, insns_cnt, "GPL", 0, bpf_log_buf, BPF_LOG_BUF_SIZE); if (ret < 0) { log_err("Loading program"); printf("Output from verifier:\n%s\n-------\n", bpf_log_buf); return 0; } return ret; } int main(int argc, char **argv) { int drop_prog, allow_prog, foo = 0, bar = 0, rc = 0; allow_prog = prog_load(1); if (!allow_prog) goto err; drop_prog = prog_load(0); if (!drop_prog) goto err; if (setup_cgroup_environment()) goto err; /* Create cgroup /foo, get fd, and join it */ foo = create_and_get_cgroup(FOO); if (!foo) goto err; if (join_cgroup(FOO)) goto err; if (bpf_prog_attach(drop_prog, foo, BPF_CGROUP_INET_EGRESS)) { log_err("Attaching prog to /foo"); goto err; } assert(system(PING_CMD) != 0); /* Create cgroup /foo/bar, get fd, and join it */ bar = create_and_get_cgroup(BAR); if (!bar) goto err; if (join_cgroup(BAR)) goto err; assert(system(PING_CMD) != 0); if (bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS)) { log_err("Attaching prog to /foo/bar"); goto err; } assert(system(PING_CMD) == 0); if (bpf_prog_detach(bar, BPF_CGROUP_INET_EGRESS)) { log_err("Detaching program from /foo/bar"); goto err; } assert(system(PING_CMD) != 0); if (bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS)) { log_err("Attaching prog to /foo/bar"); goto err; } if (bpf_prog_detach(foo, BPF_CGROUP_INET_EGRESS)) { log_err("Detaching program from /foo"); goto err; } assert(system(PING_CMD) == 0); goto out; err: rc = 1; out: close(foo); close(bar); cleanup_cgroup_environment(); return rc; } href='/cgit.cgi/linux/net-next.git/commit/tools?id=3f5c34c6d4688b3b7e1dbc7bbc68a2f03a0d6b0c'>tools/perf/pmu-events/jsmn.h
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authorManuel Lauss <manuel.lauss@gmail.com>2017-01-24 10:12:00 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2017-01-24 10:27:34 -0800
commit3f5c34c6d4688b3b7e1dbc7bbc68a2f03a0d6b0c (patch)
treeb9387d85890c4466d9cf3d3145c95e0b07235234 /tools/perf/pmu-events/jsmn.h
parent62ed8ceda1699acae01b666497f004bfd3d67a6f (diff)
Input: wm97xx - make missing platform data non-fatal
Commit 6480af4915d6 ("power_supply: wm97xx_battery: use power_supply_get_drvdata") made wm97xx platform data mandatory, although it's still optional. This patch fixes an oops during driver probe on one of my MIPS boards with a wm9712. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Reviewed-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'tools/perf/pmu-events/jsmn.h')