diff options
Diffstat (limited to 'kernel/bpf/syscall.c')
| -rw-r--r-- | kernel/bpf/syscall.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 17e29f596de1..d2f2bdf71ffa 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -1087,7 +1087,50 @@ static int bpf_obj_get(const union bpf_attr *attr) #ifdef CONFIG_CGROUP_BPF -#define BPF_PROG_ATTACH_LAST_FIELD attach_flags +#define BPF_PROG_ATTACH_LAST_FIELD attach_bpf_fd2 + +static int sockmap_get_from_fd(const union bpf_attr *attr, int ptype) +{ + struct bpf_prog *prog1, *prog2; + int ufd = attr->target_fd; + struct bpf_map *map; + struct fd f; + int err; + + f = fdget(ufd); + map = __bpf_map_get(f); + if (IS_ERR(map)) + return PTR_ERR(map); + + if (!map->ops->map_attach) { + fdput(f); + return -EOPNOTSUPP; + } + + prog1 = bpf_prog_get_type(attr->attach_bpf_fd, ptype); + if (IS_ERR(prog1)) { + fdput(f); + return PTR_ERR(prog1); + } + + prog2 = bpf_prog_get_type(attr->attach_bpf_fd2, ptype); + if (IS_ERR(prog2)) { + fdput(f); + bpf_prog_put(prog1); + return PTR_ERR(prog2); + } + + err = map->ops->map_attach(map, prog1, prog2); + if (err) { + fdput(f); + bpf_prog_put(prog1); + bpf_prog_put(prog2); + return PTR_ERR(map); + } + + fdput(f); + return err; +} static int bpf_prog_attach(const union bpf_attr *attr) { @@ -1116,10 +1159,16 @@ static int bpf_prog_attach(const union bpf_attr *attr) case BPF_CGROUP_SOCK_OPS: ptype = BPF_PROG_TYPE_SOCK_OPS; break; + case BPF_CGROUP_SMAP_INGRESS: + ptype = BPF_PROG_TYPE_SK_SKB; + break; default: return -EINVAL; } + if (attr->attach_type == BPF_CGROUP_SMAP_INGRESS) + return sockmap_get_from_fd(attr, ptype); + prog = bpf_prog_get_type(attr->attach_bpf_fd, ptype); if (IS_ERR(prog)) return PTR_ERR(prog); |