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bpf: Remove unused arguments from btf_struct_access().

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Remove unused arguments from btf_struct_access() callback.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/bpf/20230404045029.82870-3-alexei.starovoitov@gmail.com
This commit is contained in:
Alexei Starovoitov 2023-04-03 21:50:23 -07:00 • committed by Andrii Nakryiko
parent 7d64c51328
commit b7e852a9ec
7 changed files with 16 additions and 25 deletions
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3
include/linux/bpf.h
View file

@ -893,8 +893,7 @@ struct bpf_verifier_ops {
struct bpf_prog *prog, u32 *target_size);
int (*btf_struct_access)(struct bpf_verifier_log *log,
const struct bpf_reg_state *reg,
int off, int size, enum bpf_access_type atype,
u32 *next_btf_id, enum bpf_type_flag *flag);
int off, int size);
};
struct bpf_prog_offload_ops {

3
include/linux/filter.h
View file

@ -571,8 +571,7 @@ DECLARE_STATIC_KEY_FALSE(bpf_stats_enabled_key);
extern struct mutex nf_conn_btf_access_lock;
extern int (*nfct_btf_struct_access)(struct bpf_verifier_log *log,
const struct bpf_reg_state *reg,
int off, int size, enum bpf_access_type atype,
u32 *next_btf_id, enum bpf_type_flag *flag);
int off, int size);
typedef unsigned int (*bpf_dispatcher_fn)(const void *ctx,
const struct bpf_insn *insnsi,

4
kernel/bpf/verifier.c
View file

@ -5459,7 +5459,7 @@ static int check_ptr_to_btf_access(struct bpf_verifier_env *env,
const struct btf_type *t = btf_type_by_id(reg->btf, reg->btf_id);
const char *tname = btf_name_by_offset(reg->btf, t->name_off);
enum bpf_type_flag flag = 0;
u32 btf_id;
u32 btf_id = 0;
int ret;
if (!env->allow_ptr_leaks) {
@ -5509,7 +5509,7 @@ static int check_ptr_to_btf_access(struct bpf_verifier_env *env,
verbose(env, "verifier internal error: reg->btf must be kernel btf\n");
return -EFAULT;
}
ret = env->ops->btf_struct_access(&env->log, reg, off, size, atype, &btf_id, &flag);
ret = env->ops->btf_struct_access(&env->log, reg, off, size);
} else {
/* Writes are permitted with default btf_struct_access for
* program allocated objects (which always have ref_obj_id > 0),

12
net/bpf/bpf_dummy_struct_ops.c
View file

@ -173,14 +173,11 @@ static int bpf_dummy_ops_check_member(const struct btf_type *t,
static int bpf_dummy_ops_btf_struct_access(struct bpf_verifier_log *log,
const struct bpf_reg_state *reg,
int off, int size, enum bpf_access_type atype,
u32 *next_btf_id,
enum bpf_type_flag *flag)
int off, int size)
{
const struct btf_type *state;
const struct btf_type *t;
s32 type_id;
int err;
type_id = btf_find_by_name_kind(reg->btf, "bpf_dummy_ops_state",
BTF_KIND_STRUCT);
@ -194,9 +191,10 @@ static int bpf_dummy_ops_btf_struct_access(struct bpf_verifier_log *log,
return -EACCES;
}
err = btf_struct_access(log, reg, off, size, atype, next_btf_id, flag);
if (err < 0)
return err;
if (off + size > sizeof(struct bpf_dummy_ops_state)) {
bpf_log(log, "write access at off %d with size %d\n", off, size);
return -EACCES;
}
return NOT_INIT;
}

13
net/core/filter.c
View file

@ -8742,20 +8742,18 @@ EXPORT_SYMBOL_GPL(nf_conn_btf_access_lock);
int (*nfct_btf_struct_access)(struct bpf_verifier_log *log,
const struct bpf_reg_state *reg,
int off, int size, enum bpf_access_type atype,
u32 *next_btf_id, enum bpf_type_flag *flag);
int off, int size);
EXPORT_SYMBOL_GPL(nfct_btf_struct_access);
static int tc_cls_act_btf_struct_access(struct bpf_verifier_log *log,
const struct bpf_reg_state *reg,
int off, int size, enum bpf_access_type atype,
u32 *next_btf_id, enum bpf_type_flag *flag)
int off, int size)
{
int ret = -EACCES;
mutex_lock(&nf_conn_btf_access_lock);
if (nfct_btf_struct_access)
ret = nfct_btf_struct_access(log, reg, off, size, atype, next_btf_id, flag);
ret = nfct_btf_struct_access(log, reg, off, size);
mutex_unlock(&nf_conn_btf_access_lock);
return ret;
@ -8822,14 +8820,13 @@ EXPORT_SYMBOL_GPL(bpf_warn_invalid_xdp_action);
static int xdp_btf_struct_access(struct bpf_verifier_log *log,
const struct bpf_reg_state *reg,
int off, int size, enum bpf_access_type atype,
u32 *next_btf_id, enum bpf_type_flag *flag)
int off, int size)
{
int ret = -EACCES;
mutex_lock(&nf_conn_btf_access_lock);
if (nfct_btf_struct_access)
ret = nfct_btf_struct_access(log, reg, off, size, atype, next_btf_id, flag);
ret = nfct_btf_struct_access(log, reg, off, size);
mutex_unlock(&nf_conn_btf_access_lock);
return ret;

3
net/ipv4/bpf_tcp_ca.c
View file

@ -72,8 +72,7 @@ static bool bpf_tcp_ca_is_valid_access(int off, int size,
static int bpf_tcp_ca_btf_struct_access(struct bpf_verifier_log *log,
const struct bpf_reg_state *reg,
int off, int size, enum bpf_access_type atype,
u32 *next_btf_id, enum bpf_type_flag *flag)
int off, int size)
{
const struct btf_type *t;
size_t end;

3
net/netfilter/nf_conntrack_bpf.c
View file

@ -192,8 +192,7 @@ BTF_ID(struct, nf_conn___init)
/* Check writes into `struct nf_conn` */
static int _nf_conntrack_btf_struct_access(struct bpf_verifier_log *log,
const struct bpf_reg_state *reg,
int off, int size, enum bpf_access_type atype,
u32 *next_btf_id, enum bpf_type_flag *flag)
int off, int size)
{
const struct btf_type *ncit, *nct, *t;
size_t end;