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samples/bpf: Update bpf loader for cgroup section names 

Add support for section names starting with cgroup/skb and cgroup/sock.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2016-12-01 08:48:07 -08:00 committed by David S. Miller
parent aa4c1037a3
commit 4f2e7ae56e
2 changed files with 12 additions and 3 deletions
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14
samples/bpf/bpf_load.c
View File

@ -52,6 +52,8 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
bool is_tracepoint = strncmp(event, "tracepoint/", 11) == 0;
bool is_xdp = strncmp(event, "xdp", 3) == 0;
bool is_perf_event = strncmp(event, "perf_event", 10) == 0;
bool is_cgroup_skb = strncmp(event, "cgroup/skb", 10) == 0;
bool is_cgroup_sk = strncmp(event, "cgroup/sock", 11) == 0;
enum bpf_prog_type prog_type;
char buf[256];
int fd, efd, err, id;
@ -72,6 +74,10 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
prog_type = BPF_PROG_TYPE_XDP;
} else if (is_perf_event) {
prog_type = BPF_PROG_TYPE_PERF_EVENT;
} else if (is_cgroup_skb) {
prog_type = BPF_PROG_TYPE_CGROUP_SKB;
} else if (is_cgroup_sk) {
prog_type = BPF_PROG_TYPE_CGROUP_SOCK;
} else {
printf("Unknown event '%s'\n", event);
return -1;
@ -85,7 +91,7 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
prog_fd[prog_cnt++] = fd;
if (is_xdp || is_perf_event)
if (is_xdp || is_perf_event || is_cgroup_skb || is_cgroup_sk)
return 0;
if (is_socket) {
@ -334,7 +340,8 @@ int load_bpf_file(char *path)
memcmp(shname_prog, "tracepoint/", 11) == 0 ||
memcmp(shname_prog, "xdp", 3) == 0 ||
memcmp(shname_prog, "perf_event", 10) == 0 ||
memcmp(shname_prog, "socket", 6) == 0)
memcmp(shname_prog, "socket", 6) == 0 ||
memcmp(shname_prog, "cgroup/", 7) == 0)
load_and_attach(shname_prog, insns, data_prog->d_size);
}
}
@ -353,7 +360,8 @@ int load_bpf_file(char *path)
memcmp(shname, "tracepoint/", 11) == 0 ||
memcmp(shname, "xdp", 3) == 0 ||
memcmp(shname, "perf_event", 10) == 0 ||
memcmp(shname, "socket", 6) == 0)
memcmp(shname, "socket", 6) == 0 ||
memcmp(shname, "cgroup/", 7) == 0)
load_and_attach(shname, data->d_buf, data->d_size);
}

1
samples/bpf/bpf_load.h
View File

@ -7,6 +7,7 @@
extern int map_fd[MAX_MAPS];
extern int prog_fd[MAX_PROGS];
extern int event_fd[MAX_PROGS];
extern int prog_cnt;
/* parses elf file compiled by llvm .c->.o
* . parses 'maps' section and creates maps via BPF syscall