[v1] ipv4: fib: Remove unnecessary encap_type check

[PATCH net-next] ipv4: fib: Remove unnecessary encap_type check

Posted by Yue Haibing 3 months, 2 weeks ago

lwtunnel_build_state() has check validity of encap_type,
so no need to do this before call it.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
---
 net/ipv4/fib_semantics.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index f7c9c6a9f53e..475ffcbf4927 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -625,11 +625,6 @@ int fib_nh_common_init(struct net *net, struct fib_nh_common *nhc,
 	if (encap) {
 		struct lwtunnel_state *lwtstate;
 
-		if (encap_type == LWTUNNEL_ENCAP_NONE) {
-			NL_SET_ERR_MSG(extack, "LWT encap type not specified");
-			err = -EINVAL;
-			goto lwt_failure;
-		}
 		err = lwtunnel_build_state(net, encap_type, encap,
 					   nhc->nhc_family, cfg, &lwtstate,
 					   extack);
@@ -890,9 +885,6 @@ static int fib_encap_match(struct net *net, u16 encap_type,
 	struct lwtunnel_state *lwtstate;
 	int ret, result = 0;
 
-	if (encap_type == LWTUNNEL_ENCAP_NONE)
-		return 0;
-
 	ret = lwtunnel_build_state(net, encap_type, encap, AF_INET,
 				   cfg, &lwtstate, extack);
 	if (!ret) {
-- 
2.34.1

Re: [PATCH net-next] ipv4: fib: Remove unnecessary encap_type check

Posted by Kuniyuki Iwashima 3 months, 2 weeks ago

On Tue, Jun 24, 2025 at 6:46 AM Yue Haibing <yuehaibing@huawei.com> wrote:
>
> lwtunnel_build_state() has check validity of encap_type,
> so no need to do this before call it.
>
> Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
> ---
>  net/ipv4/fib_semantics.c | 8 --------
>  1 file changed, 8 deletions(-)
>
> diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
> index f7c9c6a9f53e..475ffcbf4927 100644
> --- a/net/ipv4/fib_semantics.c
> +++ b/net/ipv4/fib_semantics.c
> @@ -625,11 +625,6 @@ int fib_nh_common_init(struct net *net, struct fib_nh_common *nhc,
>         if (encap) {
>                 struct lwtunnel_state *lwtstate;
>
> -               if (encap_type == LWTUNNEL_ENCAP_NONE) {
> -                       NL_SET_ERR_MSG(extack, "LWT encap type not specified");
> -                       err = -EINVAL;
> -                       goto lwt_failure;
> -               }
>                 err = lwtunnel_build_state(net, encap_type, encap,
>                                            nhc->nhc_family, cfg, &lwtstate,
>                                            extack);
> @@ -890,9 +885,6 @@ static int fib_encap_match(struct net *net, u16 encap_type,
>         struct lwtunnel_state *lwtstate;
>         int ret, result = 0;
>
> -       if (encap_type == LWTUNNEL_ENCAP_NONE)
> -               return 0;

Now this condition returns -EINVAL, which confuses fib_encap_match(), no ?


> -
>         ret = lwtunnel_build_state(net, encap_type, encap, AF_INET,
>                                    cfg, &lwtstate, extack);
>         if (!ret) {
> --
> 2.34.1
>

Re: [PATCH net-next] ipv4: fib: Remove unnecessary encap_type check

Posted by Yue Haibing 3 months, 2 weeks ago

On 2025/6/25 2:26, Kuniyuki Iwashima wrote:
> On Tue, Jun 24, 2025 at 6:46 AM Yue Haibing <yuehaibing@huawei.com> wrote:
>>
>> lwtunnel_build_state() has check validity of encap_type,
>> so no need to do this before call it.
>>
>> Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
>> ---
>>  net/ipv4/fib_semantics.c | 8 --------
>>  1 file changed, 8 deletions(-)
>>
>> diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
>> index f7c9c6a9f53e..475ffcbf4927 100644
>> --- a/net/ipv4/fib_semantics.c
>> +++ b/net/ipv4/fib_semantics.c
>> @@ -625,11 +625,6 @@ int fib_nh_common_init(struct net *net, struct fib_nh_common *nhc,
>>         if (encap) {
>>                 struct lwtunnel_state *lwtstate;
>>
>> -               if (encap_type == LWTUNNEL_ENCAP_NONE) {
>> -                       NL_SET_ERR_MSG(extack, "LWT encap type not specified");
>> -                       err = -EINVAL;
>> -                       goto lwt_failure;
>> -               }
>>                 err = lwtunnel_build_state(net, encap_type, encap,
>>                                            nhc->nhc_family, cfg, &lwtstate,
>>                                            extack);
>> @@ -890,9 +885,6 @@ static int fib_encap_match(struct net *net, u16 encap_type,
>>         struct lwtunnel_state *lwtstate;
>>         int ret, result = 0;
>>
>> -       if (encap_type == LWTUNNEL_ENCAP_NONE)
>> -               return 0;
> 
> Now this condition returns -EINVAL, which confuses fib_encap_match(), no ?

Right, sorry for overlook this, will restore in v2.

> 
> 
>> -
>>         ret = lwtunnel_build_state(net, encap_type, encap, AF_INET,
>>                                    cfg, &lwtstate, extack);
>>         if (!ret) {
>> --
>> 2.34.1
>>
>