diff options
Diffstat (limited to 'kernel/bpf/syscall.c')
-rw-r--r-- | kernel/bpf/syscall.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index d7783cb..0d3313d 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -111,7 +111,7 @@ static const struct file_operations bpf_map_fops = { .release = bpf_map_release, }; -static int bpf_map_new_fd(struct bpf_map *map) +int bpf_map_new_fd(struct bpf_map *map) { return anon_inode_getfd("bpf-map", &bpf_map_fops, map, O_RDWR | O_CLOEXEC); @@ -174,7 +174,7 @@ struct bpf_map *__bpf_map_get(struct fd f) return f.file->private_data; } -static struct bpf_map *bpf_map_get(u32 ufd) +struct bpf_map *bpf_map_get(u32 ufd) { struct fd f = fdget(ufd); struct bpf_map *map; @@ -548,7 +548,7 @@ static const struct file_operations bpf_prog_fops = { .release = bpf_prog_release, }; -static int bpf_prog_new_fd(struct bpf_prog *prog) +int bpf_prog_new_fd(struct bpf_prog *prog) { return anon_inode_getfd("bpf-prog", &bpf_prog_fops, prog, O_RDWR | O_CLOEXEC); @@ -674,6 +674,24 @@ free_prog_nouncharge: return err; } +#define BPF_OBJ_LAST_FIELD bpf_fd + +static int bpf_obj_pin(const union bpf_attr *attr) +{ + if (CHECK_ATTR(BPF_OBJ)) + return -EINVAL; + + return bpf_obj_pin_user(attr->bpf_fd, u64_to_ptr(attr->pathname)); +} + +static int bpf_obj_get(const union bpf_attr *attr) +{ + if (CHECK_ATTR(BPF_OBJ) || attr->bpf_fd != 0) + return -EINVAL; + + return bpf_obj_get_user(u64_to_ptr(attr->pathname)); +} + SYSCALL_DEFINE3(bpf, int, cmd, union bpf_attr __user *, uattr, unsigned int, size) { union bpf_attr attr = {}; @@ -734,6 +752,12 @@ SYSCALL_DEFINE3(bpf, int, cmd, union bpf_attr __user *, uattr, unsigned int, siz case BPF_PROG_LOAD: err = bpf_prog_load(&attr); break; + case BPF_OBJ_PIN: + err = bpf_obj_pin(&attr); + break; + case BPF_OBJ_GET: + err = bpf_obj_get(&attr); + break; default: err = -EINVAL; break; |