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ebpf: constify various function pointer structs

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We can move bpf_map_ops and bpf_verifier_ops and other structs into ro
section, bpf_map_type_list and bpf_prog_type_list into read mostly.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann
2015-03-01 12:31:42 +01:00
committed by David S. Miller
parent f91fe17e24
commit a2c83fff58
5 changed files with 19 additions and 19 deletions
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6
kernel/bpf/arraymap.c
View File

@@ -134,7 +134,7 @@ static void array_map_free(struct bpf_map *map)
kvfree(array);
}
static struct bpf_map_ops array_ops = {
static const struct bpf_map_ops array_ops = {
.map_alloc = array_map_alloc,
.map_free = array_map_free,
.map_get_next_key = array_map_get_next_key,
@@ -143,14 +143,14 @@ static struct bpf_map_ops array_ops = {
.map_delete_elem = array_map_delete_elem,
};
static struct bpf_map_type_list tl = {
static struct bpf_map_type_list array_type __read_mostly = {
.ops = &array_ops,
.type = BPF_MAP_TYPE_ARRAY,
};
static int __init register_array_map(void)
{
bpf_register_map_type(&tl);
bpf_register_map_type(&array_type);
return 0;
}
late_initcall(register_array_map);

6
kernel/bpf/hashtab.c
View File

@@ -345,7 +345,7 @@ static void htab_map_free(struct bpf_map *map)
kfree(htab);
}
static struct bpf_map_ops htab_ops = {
static const struct bpf_map_ops htab_ops = {
.map_alloc = htab_map_alloc,
.map_free = htab_map_free,
.map_get_next_key = htab_map_get_next_key,
@@ -354,14 +354,14 @@ static struct bpf_map_ops htab_ops = {
.map_delete_elem = htab_map_delete_elem,
};
static struct bpf_map_type_list tl = {
static struct bpf_map_type_list htab_type __read_mostly = {
.ops = &htab_ops,
.type = BPF_MAP_TYPE_HASH,
};
static int __init register_htab_map(void)
{
bpf_register_map_type(&tl);
bpf_register_map_type(&htab_type);
return 0;
}
late_initcall(register_htab_map);

6
kernel/bpf/helpers.c
View File

@@ -41,7 +41,7 @@ static u64 bpf_map_lookup_elem(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5)
return (unsigned long) value;
}
struct bpf_func_proto bpf_map_lookup_elem_proto = {
const struct bpf_func_proto bpf_map_lookup_elem_proto = {
.func = bpf_map_lookup_elem,
.gpl_only = false,
.ret_type = RET_PTR_TO_MAP_VALUE_OR_NULL,
@@ -60,7 +60,7 @@ static u64 bpf_map_update_elem(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5)
return map->ops->map_update_elem(map, key, value, r4);
}
struct bpf_func_proto bpf_map_update_elem_proto = {
const struct bpf_func_proto bpf_map_update_elem_proto = {
.func = bpf_map_update_elem,
.gpl_only = false,
.ret_type = RET_INTEGER,
@@ -80,7 +80,7 @@ static u64 bpf_map_delete_elem(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5)
return map->ops->map_delete_elem(map, key);
}
struct bpf_func_proto bpf_map_delete_elem_proto = {
const struct bpf_func_proto bpf_map_delete_elem_proto = {
.func = bpf_map_delete_elem,
.gpl_only = false,
.ret_type = RET_INTEGER,