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Date: Mon, 26 Mar 2012 21:51:27 +0800
From: Wanlong Gao <gaowanlong@...fujitsu.com>
To: linux-kernel@...r.kernel.org
CC: gaowanlong@...fujitsu.com, linux-security-module@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Eric Paris <eparis@...isplace.org>,
James Morris <jmorris@...ei.org>, sds@...ho.nsa.gov
Subject: Re: [PATCH 2/2] selinux:avc:remove the useless fields in avc_add_callback
On 03/22/2012 07:58 AM, Wanlong Gao wrote:
> Any comments?
Ping?
>
>
>> avc_add_callback now just used for registering reset functions
>> in initcalls, and the callback functions just did reset operations.
>> So, reducing the arguments to only one event is enough now.
>>
>> Signed-off-by: Wanlong Gao <gaowanlong@...fujitsu.com>
>> ---
>> security/selinux/avc.c | 32 ++++++--------------------------
>> security/selinux/include/avc.h | 6 +-----
>> security/selinux/netif.c | 6 ++----
>> security/selinux/netnode.c | 6 ++----
>> security/selinux/netport.c | 6 ++----
>> security/selinux/ss/services.c | 6 ++----
>> 6 files changed, 15 insertions(+), 47 deletions(-)
>>
>> diff --git a/security/selinux/avc.c b/security/selinux/avc.c
>> index c301679..fc8acaa 100644
>> --- a/security/selinux/avc.c
>> +++ b/security/selinux/avc.c
>> @@ -65,14 +65,8 @@ struct avc_cache {
>> };
>>
>> struct avc_callback_node {
>> - int (*callback) (u32 event, u32 ssid, u32 tsid,
>> - u16 tclass, u32 perms,
>> - u32 *out_retained);
>> + int (*callback) (u32 event);
>> u32 events;
>> - u32 ssid;
>> - u32 tsid;
>> - u16 tclass;
>> - u32 perms;
>> struct avc_callback_node *next;
>> };
>>
>> @@ -546,22 +540,12 @@ int avc_audit(u32 ssid, u32 tsid,
>> * avc_add_callback - Register a callback for security events.
>> * @callback: callback function
>> * @events: security events
>> - * @ssid: source security identifier or %SECSID_WILD
>> - * @tsid: target security identifier or %SECSID_WILD
>> - * @tclass: target security class
>> - * @perms: permissions
>> *
>> - * Register a callback function for events in the set @events
>> - * related to the SID pair (@ssid, @tsid)
>> - * and the permissions @perms, interpreting
>> - * @perms based on @tclass. Returns %0 on success or
>> - * -%ENOMEM if insufficient memory exists to add the callback.
>> + * Register a callback function for events in the set @events.
>> + * Returns %0 on success or -%ENOMEM if insufficient memory
>> + * exists to add the callback.
>> */
>> -int __init avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
>> - u16 tclass, u32 perms,
>> - u32 *out_retained),
>> - u32 events, u32 ssid, u32 tsid,
>> - u16 tclass, u32 perms)
>> +int __init avc_add_callback(int (*callback)(u32 event), u32 events)
>> {
>> struct avc_callback_node *c;
>> int rc = 0;
>> @@ -574,9 +558,6 @@ int __init avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
>>
>> c->callback = callback;
>> c->events = events;
>> - c->ssid = ssid;
>> - c->tsid = tsid;
>> - c->perms = perms;
>> c->next = avc_callbacks;
>> avc_callbacks = c;
>> out:
>> @@ -716,8 +697,7 @@ int avc_ss_reset(u32 seqno)
>>
>> for (c = avc_callbacks; c; c = c->next) {
>> if (c->events & AVC_CALLBACK_RESET) {
>> - tmprc = c->callback(AVC_CALLBACK_RESET,
>> - 0, 0, 0, 0, NULL);
>> + tmprc = c->callback(AVC_CALLBACK_RESET);
>> /* save the first error encountered for the return
>> value and continue processing the callbacks */
>> if (!rc)
>> diff --git a/security/selinux/include/avc.h b/security/selinux/include/avc.h
>> index 47fda96..0ac5c26 100644
>> --- a/security/selinux/include/avc.h
>> +++ b/security/selinux/include/avc.h
>> @@ -88,11 +88,7 @@ u32 avc_policy_seqno(void);
>> #define AVC_CALLBACK_AUDITDENY_ENABLE 64
>> #define AVC_CALLBACK_AUDITDENY_DISABLE 128
>>
>> -int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
>> - u16 tclass, u32 perms,
>> - u32 *out_retained),
>> - u32 events, u32 ssid, u32 tsid,
>> - u16 tclass, u32 perms);
>> +int avc_add_callback(int (*callback)(u32 event), u32 events);
>>
>> /* Exported to selinuxfs */
>> int avc_get_hash_stats(char *page);
>> diff --git a/security/selinux/netif.c b/security/selinux/netif.c
>> index 326f22c..47a49d1 100644
>> --- a/security/selinux/netif.c
>> +++ b/security/selinux/netif.c
>> @@ -252,8 +252,7 @@ static void sel_netif_flush(void)
>> spin_unlock_bh(&sel_netif_lock);
>> }
>>
>> -static int sel_netif_avc_callback(u32 event, u32 ssid, u32 tsid,
>> - u16 class, u32 perms, u32 *retained)
>> +static int sel_netif_avc_callback(u32 event)
>> {
>> if (event == AVC_CALLBACK_RESET) {
>> sel_netif_flush();
>> @@ -292,8 +291,7 @@ static __init int sel_netif_init(void)
>>
>> register_netdevice_notifier(&sel_netif_netdev_notifier);
>>
>> - err = avc_add_callback(sel_netif_avc_callback, AVC_CALLBACK_RESET,
>> - SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
>> + err = avc_add_callback(sel_netif_avc_callback, AVC_CALLBACK_RESET);
>> if (err)
>> panic("avc_add_callback() failed, error %d\n", err);
>>
>> diff --git a/security/selinux/netnode.c b/security/selinux/netnode.c
>> index 8636585..28f911c 100644
>> --- a/security/selinux/netnode.c
>> +++ b/security/selinux/netnode.c
>> @@ -297,8 +297,7 @@ static void sel_netnode_flush(void)
>> spin_unlock_bh(&sel_netnode_lock);
>> }
>>
>> -static int sel_netnode_avc_callback(u32 event, u32 ssid, u32 tsid,
>> - u16 class, u32 perms, u32 *retained)
>> +static int sel_netnode_avc_callback(u32 event)
>> {
>> if (event == AVC_CALLBACK_RESET) {
>> sel_netnode_flush();
>> @@ -320,8 +319,7 @@ static __init int sel_netnode_init(void)
>> sel_netnode_hash[iter].size = 0;
>> }
>>
>> - ret = avc_add_callback(sel_netnode_avc_callback, AVC_CALLBACK_RESET,
>> - SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
>> + ret = avc_add_callback(sel_netnode_avc_callback, AVC_CALLBACK_RESET);
>> if (ret != 0)
>> panic("avc_add_callback() failed, error %d\n", ret);
>>
>> diff --git a/security/selinux/netport.c b/security/selinux/netport.c
>> index 7b9eb1f..d353797 100644
>> --- a/security/selinux/netport.c
>> +++ b/security/selinux/netport.c
>> @@ -234,8 +234,7 @@ static void sel_netport_flush(void)
>> spin_unlock_bh(&sel_netport_lock);
>> }
>>
>> -static int sel_netport_avc_callback(u32 event, u32 ssid, u32 tsid,
>> - u16 class, u32 perms, u32 *retained)
>> +static int sel_netport_avc_callback(u32 event)
>> {
>> if (event == AVC_CALLBACK_RESET) {
>> sel_netport_flush();
>> @@ -257,8 +256,7 @@ static __init int sel_netport_init(void)
>> sel_netport_hash[iter].size = 0;
>> }
>>
>> - ret = avc_add_callback(sel_netport_avc_callback, AVC_CALLBACK_RESET,
>> - SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
>> + ret = avc_add_callback(sel_netport_avc_callback, AVC_CALLBACK_RESET);
>> if (ret != 0)
>> panic("avc_add_callback() failed, error %d\n", ret);
>>
>> diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
>> index 185f849..08123cd 100644
>> --- a/security/selinux/ss/services.c
>> +++ b/security/selinux/ss/services.c
>> @@ -3018,8 +3018,7 @@ out:
>>
>> static int (*aurule_callback)(void) = audit_update_lsm_rules;
>>
>> -static int aurule_avc_callback(u32 event, u32 ssid, u32 tsid,
>> - u16 class, u32 perms, u32 *retained)
>> +static int aurule_avc_callback(u32 event)
>> {
>> int err = 0;
>>
>> @@ -3032,8 +3031,7 @@ static int __init aurule_init(void)
>> {
>> int err;
>>
>> - err = avc_add_callback(aurule_avc_callback, AVC_CALLBACK_RESET,
>> - SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
>> + err = avc_add_callback(aurule_avc_callback, AVC_CALLBACK_RESET);
>> if (err)
>> panic("avc_add_callback() failed, error %d\n", err);
>>
>
>
>
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