[PATCH v2 11/14] XSM: convert remaining event channel hooks

[Jan Beulich <jbeulich@xxxxxxxx>]

Make them follow the standard scheme, i.e. taking xsm_default_t as first
argument at call sites. This way they can be covered by the recently
introduced hook machinery.

While there, uniformly convert struct evtchn chn[] notation to pointer
form, as the (nicer) array representation is harder to make usable with
the hooks.h logic.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v2: New.

--- a/xen/common/event_channel.c
+++ b/xen/common/event_channel.c
@@ -159,7 +159,7 @@ static void free_evtchn_bucket(struct do
     if ( !bucket )
         return;
 
-    xsm_free_security_evtchns(bucket, EVTCHNS_PER_BUCKET);
+    xsm_free_security_evtchns(XSM_HOOK, bucket, EVTCHNS_PER_BUCKET);
     xfree(bucket);
 }
 
@@ -172,7 +172,7 @@ static struct evtchn *alloc_evtchn_bucke
     if ( !chn )
         goto err;
 
-    if ( xsm_alloc_security_evtchns(chn, EVTCHNS_PER_BUCKET) )
+    if ( xsm_alloc_security_evtchns(XSM_HOOK, chn, EVTCHNS_PER_BUCKET) )
         goto err;
 
     for ( i = 0; i < EVTCHNS_PER_BUCKET; i++ )
@@ -297,7 +297,7 @@ void evtchn_free(struct domain *d, struc
     chn->notify_vcpu_id = 0;
     chn->xen_consumer   = 0;
 
-    xsm_evtchn_close_post(chn);
+    xsm_evtchn_close_post(XSM_HOOK, chn);
 }
 
 static int evtchn_get_port(struct domain *d, evtchn_port_t port)
@@ -1779,7 +1779,7 @@ static void domain_dump_evtchn_info(stru
             break;
         }
 
-        ssid = xsm_show_security_evtchn(d, chn);
+        ssid = xsm_show_security_evtchn(XSM_HOOK, d, chn);
         if (ssid) {
             printk(" Z=%s\n", ssid);
             xfree(ssid);
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -311,8 +311,10 @@ static XSM_INLINE int xsm_evtchn_interdo
     return xsm_default_action(action, d1, d2);
 }
 
-static XSM_INLINE void xsm_evtchn_close_post(struct evtchn *chn)
-{}
+static XSM_INLINE void xsm_evtchn_close_post(XSM_DEFAULT_ARG struct evtchn 
*chn)
+{
+    XSM_ASSERT_ACTION(XSM_HOOK);
+}
 
 static XSM_INLINE int xsm_evtchn_send(
     XSM_DEFAULT_ARG struct domain *d, struct evtchn *chn)
@@ -336,18 +338,22 @@ static XSM_INLINE int xsm_evtchn_reset(
 }
 
 static XSM_INLINE int xsm_alloc_security_evtchns(
-    struct evtchn chn[], unsigned int nr)
+    XSM_DEFAULT_ARG struct evtchn *chn, unsigned int nr)
 {
+    XSM_ASSERT_ACTION(XSM_HOOK);
     return 0;
 }
 
 static XSM_INLINE void xsm_free_security_evtchns(
-    struct evtchn chn[], unsigned int nr)
-{}
+    XSM_DEFAULT_ARG struct evtchn *chn, unsigned int nr)
+{
+    XSM_ASSERT_ACTION(XSM_HOOK);
+}
 
 static XSM_INLINE char *xsm_show_security_evtchn(
-    struct domain *d, const struct evtchn *chn)
+    XSM_DEFAULT_ARG struct domain *d, const struct evtchn *chn)
 {
+    XSM_ASSERT_ACTION(XSM_HOOK);
     return NULL;
 }
 
--- a/xen/include/xsm/hooks.h
+++ b/xen/include/xsm/hooks.h
@@ -34,6 +34,11 @@ XSM_HOOK(int, evtchn_interdomain, struct
 XSM_HOOK(int, evtchn_send, struct domain *, struct evtchn *)
 XSM_HOOK(int, evtchn_status, struct domain *, struct evtchn *)
 XSM_HOOK(int, evtchn_reset, struct domain *, struct domain *)
+XSM_HOOK(void, evtchn_close_post, struct evtchn *)
+XSM_HOOK(int, alloc_security_evtchns, struct evtchn *, unsigned int)
+XSM_HOOK(void, free_security_evtchns, struct evtchn *, unsigned int)
+XSM_HOOK(pchar_t, show_security_evtchn, struct domain *,
+                                        const struct evtchn *)
 
 #ifdef CONFIG_GRANT_TABLE
 XSM_HOOK(int, grant_mapref, struct domain *, struct domain *, uint32_t)
--- a/xen/include/xsm/xsm.h
+++ b/xen/include/xsm/xsm.h
@@ -21,6 +21,9 @@
 /* policy magic number (defined by XSM_MAGIC) */
 typedef uint32_t xsm_magic_t;
 
+/* Auxiliary type(s) for use in hook definitions. */
+typedef char *pchar_t;
+
 #ifdef CONFIG_XSM_FLASK
 #define XSM_MAGIC 0xf97cff8cU
 #else
@@ -76,13 +79,8 @@ struct xsm_ops {
 
 #include "hooks.h"
 
-    void (*evtchn_close_post)(struct evtchn *chn);
-
     int (*alloc_security_domain)(struct domain *d);
     void (*free_security_domain)(struct domain *d);
-    int (*alloc_security_evtchns)(struct evtchn chn[], unsigned int nr);
-    void (*free_security_evtchns)(struct evtchn chn[], unsigned int nr);
-    char *(*show_security_evtchn)(struct domain *d, const struct evtchn *chn);
 
     char *(*show_irq_sid)(int irq);
 };
@@ -104,8 +102,9 @@ static inline void xsm_security_domainin
     alternative_vcall(xsm_ops.security_domaininfo, d, info);
 }
 
-#define XSM_ALT_void alternative_vcall
-#define XSM_ALT_int  return alternative_call
+#define XSM_ALT_void      alternative_vcall
+#define XSM_ALT_int       return alternative_call
+#define XSM_ALT_pchar_t   return alternative_call
 
 #define XSM_HOOK0(rtype, name) \
 static inline rtype xsm_ ## name(xsm_default_t def) \
@@ -150,11 +149,6 @@ static inline rtype xsm_ ## name( \
 
 #include "hooks.h"
 
-static inline void xsm_evtchn_close_post(struct evtchn *chn)
-{
-    alternative_vcall(xsm_ops.evtchn_close_post, chn);
-}
-
 static inline int xsm_alloc_security_domain(struct domain *d)
 {
     return alternative_call(xsm_ops.alloc_security_domain, d);
@@ -165,24 +159,6 @@ static inline void xsm_free_security_dom
     alternative_vcall(xsm_ops.free_security_domain, d);
 }
 
-static inline int xsm_alloc_security_evtchns(
-    struct evtchn *chn, unsigned int nr)
-{
-    return alternative_call(xsm_ops.alloc_security_evtchns, chn, nr);
-}
-
-static inline void xsm_free_security_evtchns(
-    struct evtchn *chn, unsigned int nr)
-{
-    alternative_vcall(xsm_ops.free_security_evtchns, chn, nr);
-}
-
-static inline char *xsm_show_security_evtchn(
-    struct domain *d, const struct evtchn *chn)
-{
-    return alternative_call(xsm_ops.show_security_evtchn, d, chn);
-}
-
 static inline char *xsm_show_irq_sid(int irq)
 {
     return alternative_call(xsm_ops.show_irq_sid, irq);
--- a/xen/xsm/dummy.c
+++ b/xen/xsm/dummy.c
@@ -26,13 +26,8 @@ static const struct xsm_ops __initconst_
 
 #include <xsm/hooks.h>
 
-    .evtchn_close_post             = xsm_evtchn_close_post,
-
     .alloc_security_domain         = xsm_alloc_security_domain,
     .free_security_domain          = xsm_free_security_domain,
-    .alloc_security_evtchns        = xsm_alloc_security_evtchns,
-    .free_security_evtchns         = xsm_free_security_evtchns,
-    .show_security_evtchn          = xsm_show_security_evtchn,
 
     .show_irq_sid                  = xsm_show_irq_sid,
 };
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -1915,13 +1915,8 @@ static const struct xsm_ops __initconst_
 
 #include <xsm/hooks.h>
 
-    .evtchn_close_post = flask_evtchn_close_post,
-
     .alloc_security_domain = flask_domain_alloc_security,
     .free_security_domain = flask_domain_free_security,
-    .alloc_security_evtchns = flask_alloc_security_evtchns,
-    .free_security_evtchns = flask_free_security_evtchns,
-    .show_security_evtchn = flask_show_security_evtchn,
 
     .show_irq_sid = flask_show_irq_sid,
 };