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bpftool: print program device bound info 

If program is bound to a device, print the name of the relevant
interface or unknown if the netdev has since been removed.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2017-11-03 13:56:19 -07:00 committed by David S. Miller
parent bd601b6ada
commit 928631e054
2 changed files with 38 additions and 0 deletions
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31
tools/bpf/bpftool/prog.c
View File

@ -41,6 +41,7 @@
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/stat.h>
@ -229,6 +230,21 @@ static void print_prog_json(struct bpf_prog_info *info, int fd)
info->tag[0], info->tag[1], info->tag[2], info->tag[3],
info->tag[4], info->tag[5], info->tag[6], info->tag[7]);
if (info->status & BPF_PROG_STATUS_DEV_BOUND) {
jsonw_name(json_wtr, "dev");
if (info->ifindex) {
char name[IF_NAMESIZE];
if (!if_indextoname(info->ifindex, name))
jsonw_printf(json_wtr, "\"ifindex:%d\"",
info->ifindex);
else
jsonw_printf(json_wtr, "\"%s\"", name);
} else {
jsonw_printf(json_wtr, "\"unknown\"");
}
}
if (info->load_time) {
char buf[32];
@ -274,6 +290,21 @@ static void print_prog_plain(struct bpf_prog_info *info, int fd)
printf("tag ");
fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");
printf(" ");
if (info->status & BPF_PROG_STATUS_DEV_BOUND) {
printf("dev ");
if (info->ifindex) {
char name[IF_NAMESIZE];
if (!if_indextoname(info->ifindex, name))
printf("ifindex:%d ", info->ifindex);
else
printf("%s ", name);
} else {
printf("unknown ");
}
}
printf("\n");
if (info->load_time) {

7
tools/include/uapi/linux/bpf.h
View File

@ -259,6 +259,7 @@ union bpf_attr {
__u32 kern_version; /* checked when prog_type=kprobe */
__u32 prog_flags;
char prog_name[BPF_OBJ_NAME_LEN];
__u32 prog_target_ifindex; /* ifindex of netdev to prep for */
};
struct { /* anonymous struct used by BPF_OBJ_* commands */
@ -893,6 +894,10 @@ enum sk_action {
#define BPF_TAG_SIZE 8
enum bpf_prog_status {
BPF_PROG_STATUS_DEV_BOUND = (1 << 0),
};
struct bpf_prog_info {
__u32 type;
__u32 id;
@ -906,6 +911,8 @@ struct bpf_prog_info {
__u32 nr_map_ids;
__aligned_u64 map_ids;
char name[BPF_OBJ_NAME_LEN];
__u32 ifindex;
__u32 status;
} __attribute__((aligned(8)));
struct bpf_map_info {