diff options
Diffstat (limited to 'kernel/bpf/syscall.c')
| -rw-r--r-- | kernel/bpf/syscall.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index ede5f987484f..f406dfa13792 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -105,6 +105,7 @@ const struct bpf_map_ops bpf_map_offload_ops = { .map_alloc = bpf_map_offload_map_alloc, .map_free = bpf_map_offload_map_free, .map_check_btf = map_check_no_btf, + .map_mem_usage = bpf_map_offload_map_mem_usage, }; static struct bpf_map *find_and_alloc_map(union bpf_attr *attr) @@ -128,6 +129,8 @@ static struct bpf_map *find_and_alloc_map(union bpf_attr *attr) } if (attr->map_ifindex) ops = &bpf_map_offload_ops; + if (!ops->map_mem_usage) + return ERR_PTR(-EINVAL); map = ops->map_alloc(attr); if (IS_ERR(map)) return map; @@ -771,17 +774,10 @@ static fmode_t map_get_sys_perms(struct bpf_map *map, struct fd f) } #ifdef CONFIG_PROC_FS -/* Provides an approximation of the map's memory footprint. - * Used only to provide a backward compatibility and display - * a reasonable "memlock" info. - */ -static unsigned long bpf_map_memory_footprint(const struct bpf_map *map) +/* Show the memory usage of a bpf map */ +static u64 bpf_map_memory_usage(const struct bpf_map *map) { - unsigned long size; - - size = round_up(map->key_size + bpf_map_value_size(map), 8); - - return round_up(map->max_entries * size, PAGE_SIZE); + return map->ops->map_mem_usage(map); } static void bpf_map_show_fdinfo(struct seq_file *m, struct file *filp) @@ -803,7 +799,7 @@ static void bpf_map_show_fdinfo(struct seq_file *m, struct file *filp) "max_entries:\t%u\n" "map_flags:\t%#x\n" "map_extra:\t%#llx\n" - "memlock:\t%lu\n" + "memlock:\t%llu\n" "map_id:\t%u\n" "frozen:\t%u\n", map->map_type, @@ -812,7 +808,7 @@ static void bpf_map_show_fdinfo(struct seq_file *m, struct file *filp) map->max_entries, map->map_flags, (unsigned long long)map->map_extra, - bpf_map_memory_footprint(map), + bpf_map_memory_usage(map), map->id, READ_ONCE(map->frozen)); if (type) { |