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Kernel
提交 39f19ebb 编写于 作者: A Alexei Starovoitov 提交者： David S. Miller
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bpf: rename ARG_PTR_TO_STACK 

since ARG_PTR_TO_STACK is no longer just pointer to stack
rename it to ARG_PTR_TO_MEM and adjust comment.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 06c1c049
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Showing with 52 addition and 52 deletion
include/linux/bpf.h
浏览文件 @ 39f19ebb
......@@ -69,14 +69,14 @@ enum bpf_arg_type {
/* the following constraints used to prototype bpf_memcmp() and other
* functions that access data on eBPF program stack
*/
ARG_PTR_TO_STACK, /* any pointer to eBPF program stack */
ARG_PTR_TO_RAW_STACK, /* any pointer to eBPF program stack, area does not
* need to be initialized, helper function must fill
* all bytes or clear them in error case.
ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
* helper function must fill all bytes or clear
* them in error case.
*/
ARG_CONST_STACK_SIZE, /* number of bytes accessed from stack */
ARG_CONST_STACK_SIZE_OR_ZERO, /* number of bytes accessed from stack or 0 */
ARG_CONST_SIZE, /* number of bytes accessed from memory */
ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
ARG_PTR_TO_CTX, /* pointer to context */
ARG_ANYTHING, /* any (initialized) argument is ok */
......
kernel/bpf/helpers.c
浏览文件 @ 39f19ebb
......@@ -176,6 +176,6 @@ const struct bpf_func_proto bpf_get_current_comm_proto = {
.func = bpf_get_current_comm,
.gpl_only = false,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_RAW_STACK,
.arg2_type = ARG_CONST_STACK_SIZE,
.arg1_type = ARG_PTR_TO_UNINIT_MEM,
.arg2_type = ARG_CONST_SIZE,
};
kernel/bpf/verifier.c
浏览文件 @ 39f19ebb
......@@ -1034,8 +1034,8 @@ static int check_func_arg(struct bpf_verifier_env *env, u32 regno,
expected_type = PTR_TO_STACK;
if (type != PTR_TO_PACKET && type != expected_type)
goto err_type;
} else if (arg_type == ARG_CONST_STACK_SIZE ||
arg_type == ARG_CONST_STACK_SIZE_OR_ZERO) {
} else if (arg_type == ARG_CONST_SIZE ||
arg_type == ARG_CONST_SIZE_OR_ZERO) {
expected_type = CONST_IMM;
/* One exception. Allow UNKNOWN_VALUE registers when the
* boundaries are known and don't cause unsafe memory accesses
......@@ -1050,8 +1050,8 @@ static int check_func_arg(struct bpf_verifier_env *env, u32 regno,
expected_type = PTR_TO_CTX;
if (type != expected_type)
goto err_type;
} else if (arg_type == ARG_PTR_TO_STACK ||
arg_type == ARG_PTR_TO_RAW_STACK) {
} else if (arg_type == ARG_PTR_TO_MEM ||
arg_type == ARG_PTR_TO_UNINIT_MEM) {
expected_type = PTR_TO_STACK;
/* One exception here. In case function allows for NULL to be
* passed in as argument, it's a CONST_IMM type. Final test
......@@ -1062,7 +1062,7 @@ static int check_func_arg(struct bpf_verifier_env *env, u32 regno,
else if (type != PTR_TO_PACKET && type != PTR_TO_MAP_VALUE &&
type != PTR_TO_MAP_VALUE_ADJ && type != expected_type)
goto err_type;
meta->raw_mode = arg_type == ARG_PTR_TO_RAW_STACK;
meta->raw_mode = arg_type == ARG_PTR_TO_UNINIT_MEM;
} else {
verbose("unsupported arg_type %d\n", arg_type);
return -EFAULT;
......@@ -1108,9 +1108,9 @@ static int check_func_arg(struct bpf_verifier_env *env, u32 regno,
err = check_stack_boundary(env, regno,
meta->map_ptr->value_size,
false, NULL);
} else if (arg_type == ARG_CONST_STACK_SIZE ||
arg_type == ARG_CONST_STACK_SIZE_OR_ZERO) {
bool zero_size_allowed = (arg_type == ARG_CONST_STACK_SIZE_OR_ZERO);
} else if (arg_type == ARG_CONST_SIZE ||
arg_type == ARG_CONST_SIZE_OR_ZERO) {
bool zero_size_allowed = (arg_type == ARG_CONST_SIZE_OR_ZERO);
/* bpf_xxx(..., buf, len) call will access 'len' bytes
* from stack pointer 'buf'. Check it
......@@ -1118,7 +1118,7 @@ static int check_func_arg(struct bpf_verifier_env *env, u32 regno,
*/
if (regno == 0) {
/* kernel subsystem misconfigured verifier */
verbose("ARG_CONST_STACK_SIZE cannot be first argument\n");
verbose("ARG_CONST_SIZE cannot be first argument\n");
return -EACCES;
}
......@@ -1235,15 +1235,15 @@ static int check_raw_mode(const struct bpf_func_proto *fn)
{
int count = 0;
if (fn->arg1_type == ARG_PTR_TO_RAW_STACK)
if (fn->arg1_type == ARG_PTR_TO_UNINIT_MEM)
count++;
if (fn->arg2_type == ARG_PTR_TO_RAW_STACK)
if (fn->arg2_type == ARG_PTR_TO_UNINIT_MEM)
count++;
if (fn->arg3_type == ARG_PTR_TO_RAW_STACK)
if (fn->arg3_type == ARG_PTR_TO_UNINIT_MEM)
count++;
if (fn->arg4_type == ARG_PTR_TO_RAW_STACK)
if (fn->arg4_type == ARG_PTR_TO_UNINIT_MEM)
count++;
if (fn->arg5_type == ARG_PTR_TO_RAW_STACK)
if (fn->arg5_type == ARG_PTR_TO_UNINIT_MEM)
count++;
return count > 1 ? -EINVAL : 0;
......
kernel/trace/bpf_trace.c
浏览文件 @ 39f19ebb
......@@ -76,8 +76,8 @@ static const struct bpf_func_proto bpf_probe_read_proto = {
.func = bpf_probe_read,
.gpl_only = true,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_RAW_STACK,
.arg2_type = ARG_CONST_STACK_SIZE,
.arg1_type = ARG_PTR_TO_UNINIT_MEM,
.arg2_type = ARG_CONST_SIZE,
.arg3_type = ARG_ANYTHING,
};
......@@ -109,8 +109,8 @@ static const struct bpf_func_proto bpf_probe_write_user_proto = {
.gpl_only = true,
.ret_type = RET_INTEGER,
.arg1_type = ARG_ANYTHING,
.arg2_type = ARG_PTR_TO_STACK,
.arg3_type = ARG_CONST_STACK_SIZE,
.arg2_type = ARG_PTR_TO_MEM,
.arg3_type = ARG_CONST_SIZE,
};
static const struct bpf_func_proto *bpf_get_probe_write_proto(void)
......@@ -213,8 +213,8 @@ static const struct bpf_func_proto bpf_trace_printk_proto = {
.func = bpf_trace_printk,
.gpl_only = true,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_STACK,
.arg2_type = ARG_CONST_STACK_SIZE,
.arg1_type = ARG_PTR_TO_MEM,
.arg2_type = ARG_CONST_SIZE,
};
const struct bpf_func_proto *bpf_get_trace_printk_proto(void)
......@@ -329,8 +329,8 @@ static const struct bpf_func_proto bpf_perf_event_output_proto = {
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_CONST_MAP_PTR,
.arg3_type = ARG_ANYTHING,
.arg4_type = ARG_PTR_TO_STACK,
.arg5_type = ARG_CONST_STACK_SIZE,
.arg4_type = ARG_PTR_TO_MEM,
.arg5_type = ARG_CONST_SIZE,
};
static DEFINE_PER_CPU(struct pt_regs, bpf_pt_regs);
......@@ -492,8 +492,8 @@ static const struct bpf_func_proto bpf_perf_event_output_proto_tp = {
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_CONST_MAP_PTR,
.arg3_type = ARG_ANYTHING,
.arg4_type = ARG_PTR_TO_STACK,
.arg5_type = ARG_CONST_STACK_SIZE,
.arg4_type = ARG_PTR_TO_MEM,
.arg5_type = ARG_CONST_SIZE,
};
BPF_CALL_3(bpf_get_stackid_tp, void *, tp_buff, struct bpf_map *, map,
......
net/core/filter.c
浏览文件 @ 39f19ebb
......@@ -1416,8 +1416,8 @@ static const struct bpf_func_proto bpf_skb_store_bytes_proto = {
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_ANYTHING,
.arg3_type = ARG_PTR_TO_STACK,
.arg4_type = ARG_CONST_STACK_SIZE,
.arg3_type = ARG_PTR_TO_MEM,
.arg4_type = ARG_CONST_SIZE,
.arg5_type = ARG_ANYTHING,
};
......@@ -1447,8 +1447,8 @@ static const struct bpf_func_proto bpf_skb_load_bytes_proto = {
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_ANYTHING,
.arg3_type = ARG_PTR_TO_RAW_STACK,
.arg4_type = ARG_CONST_STACK_SIZE,
.arg3_type = ARG_PTR_TO_UNINIT_MEM,
.arg4_type = ARG_CONST_SIZE,
};
BPF_CALL_2(bpf_skb_pull_data, struct sk_buff *, skb, u32, len)
......@@ -1601,10 +1601,10 @@ static const struct bpf_func_proto bpf_csum_diff_proto = {
.gpl_only = false,
.pkt_access = true,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_STACK,
.arg2_type = ARG_CONST_STACK_SIZE_OR_ZERO,
.arg3_type = ARG_PTR_TO_STACK,
.arg4_type = ARG_CONST_STACK_SIZE_OR_ZERO,
.arg1_type = ARG_PTR_TO_MEM,
.arg2_type = ARG_CONST_SIZE_OR_ZERO,
.arg3_type = ARG_PTR_TO_MEM,
.arg4_type = ARG_CONST_SIZE_OR_ZERO,
.arg5_type = ARG_ANYTHING,
};
......@@ -2306,8 +2306,8 @@ static const struct bpf_func_proto bpf_skb_event_output_proto = {
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_CONST_MAP_PTR,
.arg3_type = ARG_ANYTHING,
.arg4_type = ARG_PTR_TO_STACK,
.arg5_type = ARG_CONST_STACK_SIZE,
.arg4_type = ARG_PTR_TO_MEM,
.arg5_type = ARG_CONST_SIZE,
};
static unsigned short bpf_tunnel_key_af(u64 flags)
......@@ -2377,8 +2377,8 @@ static const struct bpf_func_proto bpf_skb_get_tunnel_key_proto = {
.gpl_only = false,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_PTR_TO_RAW_STACK,
.arg3_type = ARG_CONST_STACK_SIZE,
.arg2_type = ARG_PTR_TO_UNINIT_MEM,
.arg3_type = ARG_CONST_SIZE,
.arg4_type = ARG_ANYTHING,
};
......@@ -2412,8 +2412,8 @@ static const struct bpf_func_proto bpf_skb_get_tunnel_opt_proto = {
.gpl_only = false,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_PTR_TO_RAW_STACK,
.arg3_type = ARG_CONST_STACK_SIZE,
.arg2_type = ARG_PTR_TO_UNINIT_MEM,
.arg3_type = ARG_CONST_SIZE,
};
static struct metadata_dst __percpu *md_dst;
......@@ -2483,8 +2483,8 @@ static const struct bpf_func_proto bpf_skb_set_tunnel_key_proto = {
.gpl_only = false,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_PTR_TO_STACK,
.arg3_type = ARG_CONST_STACK_SIZE,
.arg2_type = ARG_PTR_TO_MEM,
.arg3_type = ARG_CONST_SIZE,
.arg4_type = ARG_ANYTHING,
};
......@@ -2509,8 +2509,8 @@ static const struct bpf_func_proto bpf_skb_set_tunnel_opt_proto = {
.gpl_only = false,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_PTR_TO_STACK,
.arg3_type = ARG_CONST_STACK_SIZE,
.arg2_type = ARG_PTR_TO_MEM,
.arg3_type = ARG_CONST_SIZE,
};
static const struct bpf_func_proto *
......@@ -2593,8 +2593,8 @@ static const struct bpf_func_proto bpf_xdp_event_output_proto = {
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_CONST_MAP_PTR,
.arg3_type = ARG_ANYTHING,
.arg4_type = ARG_PTR_TO_STACK,
.arg5_type = ARG_CONST_STACK_SIZE,
.arg4_type = ARG_PTR_TO_MEM,
.arg5_type = ARG_CONST_SIZE,
};
static const struct bpf_func_proto *
......
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