Re: [PATCH] selinux:Delete selinux_xfrm_policy_lookup() useless argument

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On 4/8/2021 1:49 AM, Zhongjun Tan wrote:
> From: Zhongjun Tan <tanzhongjun@xxxxxxxxxx>
>
> Delete selinux selinux_xfrm_policy_lookup() useless argument.
>
> Signed-off-by: Zhongjun Tan <tanzhongjun@xxxxxxxxxx>
> ---
>  include/linux/lsm_hook_defs.h   | 3 +--
>  include/linux/security.h        | 4 ++--
>  net/xfrm/xfrm_policy.c          | 6 ++----
>  security/security.c             | 4 ++--
>  security/selinux/include/xfrm.h | 2 +-
>  security/selinux/xfrm.c         | 2 +-
>  6 files changed, 9 insertions(+), 12 deletions(-)
>
> diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
> index 04c0179..2adeea4 100644
> --- a/include/linux/lsm_hook_defs.h
> +++ b/include/linux/lsm_hook_defs.h
> @@ -358,8 +358,7 @@
>  	 struct xfrm_sec_ctx *polsec, u32 secid)
>  LSM_HOOK(void, LSM_RET_VOID, xfrm_state_free_security, struct xfrm_state *x)
>  LSM_HOOK(int, 0, xfrm_state_delete_security, struct xfrm_state *x)
> -LSM_HOOK(int, 0, xfrm_policy_lookup, struct xfrm_sec_ctx *ctx, u32 fl_secid,
> -	 u8 dir)
> +LSM_HOOK(int, 0, xfrm_policy_lookup, struct xfrm_sec_ctx *ctx, u32 fl_secid)
>  LSM_HOOK(int, 1, xfrm_state_pol_flow_match, struct xfrm_state *x,
>  	 struct xfrm_policy *xp, const struct flowi_common *flic)
>  LSM_HOOK(int, 0, xfrm_decode_session, struct sk_buff *skb, u32 *secid,

Please update the descriptive comment at the top of the file.

> diff --git a/include/linux/security.h b/include/linux/security.h
> index 06f7c50..24eda04 100644
> --- a/include/linux/security.h
> +++ b/include/linux/security.h
> @@ -1681,7 +1681,7 @@ int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
>  				      struct xfrm_sec_ctx *polsec, u32 secid);
>  int security_xfrm_state_delete(struct xfrm_state *x);
>  void security_xfrm_state_free(struct xfrm_state *x);
> -int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
> +int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid);
>  int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
>  				       struct xfrm_policy *xp,
>  				       const struct flowi_common *flic);
> @@ -1732,7 +1732,7 @@ static inline int security_xfrm_state_delete(struct xfrm_state *x)
>  	return 0;
>  }
>  
> -static inline int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
> +static inline int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid)
>  {
>  	return 0;
>  }
> diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
> index 156347f..d5d934e 100644
> --- a/net/xfrm/xfrm_policy.c
> +++ b/net/xfrm/xfrm_policy.c
> @@ -1902,8 +1902,7 @@ static int xfrm_policy_match(const struct xfrm_policy *pol,
>  
>  	match = xfrm_selector_match(sel, fl, family);
>  	if (match)
> -		ret = security_xfrm_policy_lookup(pol->security, fl->flowi_secid,
> -						  dir);
> +		ret = security_xfrm_policy_lookup(pol->security, fl->flowi_secid);
>  	return ret;
>  }
>  
> @@ -2181,8 +2180,7 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir,
>  				goto out;
>  			}
>  			err = security_xfrm_policy_lookup(pol->security,
> -						      fl->flowi_secid,
> -						      dir);
> +						      fl->flowi_secid);
>  			if (!err) {
>  				if (!xfrm_pol_hold_rcu(pol))
>  					goto again;
> diff --git a/security/security.c b/security/security.c
> index b38155b..0c1c979 100644
> --- a/security/security.c
> +++ b/security/security.c
> @@ -2466,9 +2466,9 @@ void security_xfrm_state_free(struct xfrm_state *x)
>  	call_void_hook(xfrm_state_free_security, x);
>  }
>  
> -int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
> +int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid)
>  {
> -	return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
> +	return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid);
>  }
>  
>  int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
> diff --git a/security/selinux/include/xfrm.h b/security/selinux/include/xfrm.h
> index 0a6f34a..7415940 100644
> --- a/security/selinux/include/xfrm.h
> +++ b/security/selinux/include/xfrm.h
> @@ -23,7 +23,7 @@ int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
>  				     struct xfrm_sec_ctx *polsec, u32 secid);
>  void selinux_xfrm_state_free(struct xfrm_state *x);
>  int selinux_xfrm_state_delete(struct xfrm_state *x);
> -int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
> +int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid);
>  int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
>  				      struct xfrm_policy *xp,
>  				      const struct flowi_common *flic);
> diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
> index 634f3db..be83e5c 100644
> --- a/security/selinux/xfrm.c
> +++ b/security/selinux/xfrm.c
> @@ -150,7 +150,7 @@ static int selinux_xfrm_delete(struct xfrm_sec_ctx *ctx)
>   * LSM hook implementation that authorizes that a flow can use a xfrm policy
>   * rule.
>   */
> -int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
> +int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid)
>  {
>  	int rc;
>  



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