diff options
| author |   Zhenyu Wang <zhenyuw@linux.intel.com> | 2019-04-16 16:50:34 +0800 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2019-04-16 16:50:34 +0800 |
| commit | 95d002e0a34cb0f238abb39987f9980f325d8332 (patch) | |
| tree | b8ed70572a55b4e67410f906159f86e8aabb0f6a /kernel/bpf/arraymap.c | |
| parent | drm/i915/gvt: Enable async flip on plane surface mmio writes (diff) | |
| parent | drm/i915: Update DRIVER_DATE to 20190404 (diff) | |
Merge tag 'drm-intel-next-2019-04-04' into gvt-next
Merge back drm-intel-next for engine name definition refinement
and 54939ea0bd85 ("drm/i915: Switch to use HWS indices rather than addresses")
that would need gvt fixes to depend on.
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'kernel/bpf/arraymap.c')
| -rw-r--r-- | kernel/bpf/arraymap.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c index 24583da9ffd1..c72e0d8e1e65 100644 --- a/kernel/bpf/arraymap.c +++ b/kernel/bpf/arraymap.c @@ -253,8 +253,9 @@ static int array_map_update_elem(struct bpf_map *map, void *key, void *value, { struct bpf_array *array = container_of(map, struct bpf_array, map); u32 index = *(u32 *)key; + char *val; - if (unlikely(map_flags > BPF_EXIST)) + if (unlikely((map_flags & ~BPF_F_LOCK) > BPF_EXIST)) /* unknown flags */ return -EINVAL; @@ -262,17 +263,25 @@ static int array_map_update_elem(struct bpf_map *map, void *key, void *value, /* all elements were pre-allocated, cannot insert a new one */ return -E2BIG; - if (unlikely(map_flags == BPF_NOEXIST)) + if (unlikely(map_flags & BPF_NOEXIST)) /* all elements already exist */ return -EEXIST; - if (array->map.map_type == BPF_MAP_TYPE_PERCPU_ARRAY) + if (unlikely((map_flags & BPF_F_LOCK) && + !map_value_has_spin_lock(map))) + return -EINVAL; + + if (array->map.map_type == BPF_MAP_TYPE_PERCPU_ARRAY) { memcpy(this_cpu_ptr(array->pptrs[index & array->index_mask]), value, map->value_size); - else - memcpy(array->value + - array->elem_size * (index & array->index_mask), - value, map->value_size); + } else { + val = array->value + + array->elem_size * (index & array->index_mask); + if (map_flags & BPF_F_LOCK) + copy_map_value_locked(map, val, value, false); + else + copy_map_value(map, val, value); + } return 0; } @@ -382,6 +391,7 @@ static void percpu_array_map_seq_show_elem(struct bpf_map *map, void *key, } static int array_map_check_btf(const struct bpf_map *map, + const struct btf *btf, const struct btf_type *key_type, const struct btf_type *value_type) { |