[PATCH 17/24] XSM: make Argo hooks well-formed ones

[Jan Beulich <jbeulich@suse.com>]

For whatever reason they didn't have an xsm_default_t first argument (to
cope with XSM=n mode), making it impossible to (easily) cover them in
xsm/hooks.h.

To be able to retain the const on their function parameters, adjust
xsm_default_action() accordingly.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/common/argo.c
+++ b/xen/common/argo.c
@@ -1341,7 +1341,7 @@ fill_ring_data(const struct domain *curr
      * Don't supply information about rings that a guest is not
      * allowed to send to.
      */
-    ret = xsm_argo_send(currd, dst_d);
+    ret = xsm_argo_send(XSM_HOOK, currd, dst_d);
     if ( ret )
         goto out;
 
@@ -1666,8 +1666,9 @@ register_ring(struct domain *currd,
 
     if ( reg.partner_id == XEN_ARGO_DOMID_ANY )
     {
-        ret = opt_argo_mac_permissive ? xsm_argo_register_any_source(currd) :
-                                        -EPERM;
+        ret = opt_argo_mac_permissive
+              ? xsm_argo_register_any_source(XSM_HOOK, currd)
+              : -EPERM;
         if ( ret )
             return ret;
     }
@@ -1680,7 +1681,7 @@ register_ring(struct domain *currd,
             return -ESRCH;
         }
 
-        ret = xsm_argo_register_single_source(currd, dst_d);
+        ret = xsm_argo_register_single_source(XSM_HOOK, currd, dst_d);
         if ( ret )
             goto out;
 
@@ -2002,7 +2003,7 @@ sendv(struct domain *src_d, xen_argo_add
     if ( !dst_d )
         return -ESRCH;
 
-    ret = xsm_argo_send(src_d, dst_d);
+    ret = xsm_argo_send(XSM_HOOK, src_d, dst_d);
     if ( ret )
     {
         gprintk(XENLOG_ERR, "argo: XSM REJECTED %i -> %i\n",
@@ -2100,7 +2101,7 @@ do_argo_op(unsigned int cmd, XEN_GUEST_H
     if ( unlikely(!opt_argo) )
         return -EOPNOTSUPP;
 
-    rc = xsm_argo_enable(currd);
+    rc = xsm_argo_enable(XSM_HOOK, currd);
     if ( rc )
         return rc;
 
@@ -2242,7 +2243,7 @@ compat_argo_op(unsigned int cmd, XEN_GUE
     if ( unlikely(!opt_argo) )
         return -EOPNOTSUPP;
 
-    rc = xsm_argo_enable(currd);
+    rc = xsm_argo_enable(XSM_HOOK, currd);
     if ( rc )
         return rc;
 
@@ -2307,7 +2308,7 @@ argo_init(struct domain *d)
 {
     struct argo_domain *argo;
 
-    if ( !opt_argo || xsm_argo_enable(d) )
+    if ( !opt_argo || xsm_argo_enable(XSM_HOOK, d) )
     {
         argo_dprintk("argo disabled, domid: %u\n", d->domain_id);
         return 0;
@@ -2365,8 +2366,8 @@ argo_soft_reset(struct domain *d)
         wildcard_rings_pending_remove(d);
 
         /*
-         * Since neither opt_argo or xsm_argo_enable(d) can change at runtime,
-         * if d->argo is true then both opt_argo and xsm_argo_enable(d) must be
+         * Since neither opt_argo nor xsm_argo_enable() can change at runtime,
+         * if d->argo is true then both opt_argo and xsm_argo_enable() must be
          * true, and we can assume that init is allowed to proceed again here.
          */
         argo_domain_init(d->argo);
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -76,7 +76,7 @@ void __xsm_action_mismatch_detected(void
 #endif /* CONFIG_XSM */
 
 static always_inline int xsm_default_action(
-    xsm_default_t action, struct domain *src, struct domain *target)
+    xsm_default_t action, const struct domain *src, const struct domain *target)
 {
     switch ( action ) {
     case XSM_HOOK:
@@ -751,27 +751,32 @@ static XSM_INLINE int xsm_dm_op(XSM_DEFA
 #endif
 
 #ifdef CONFIG_ARGO
-static XSM_INLINE int xsm_argo_enable(const struct domain *d)
+
+static XSM_INLINE int xsm_argo_enable(XSM_DEFAULT_ARG const struct domain *d)
 {
-    return 0;
+    XSM_ASSERT_ACTION(XSM_HOOK);
+    return xsm_default_action(action, current->domain, d);
 }
 
 static XSM_INLINE int xsm_argo_register_single_source(
-    const struct domain *d, const struct domain *t)
+    XSM_DEFAULT_ARG const struct domain *d, const struct domain *t)
 {
-    return 0;
+    XSM_ASSERT_ACTION(XSM_HOOK);
+    return xsm_default_action(action, d, t);
 }
 
 static XSM_INLINE int xsm_argo_register_any_source(
-    const struct domain *d)
+    XSM_DEFAULT_ARG const struct domain *d)
 {
-    return 0;
+    XSM_ASSERT_ACTION(XSM_HOOK);
+    return xsm_default_action(action, current->domain, d);
 }
 
 static XSM_INLINE int xsm_argo_send(
-    const struct domain *d, const struct domain *t)
+    XSM_DEFAULT_ARG const struct domain *d, const struct domain *t)
 {
-    return 0;
+    XSM_ASSERT_ACTION(XSM_HOOK);
+    return xsm_default_action(action, d, t);
 }
 
 #endif /* CONFIG_ARGO */
--- a/xen/include/xsm/hooks.h
+++ b/xen/include/xsm/hooks.h
@@ -156,6 +156,14 @@ XSM_HOOK(int, dm_op, struct domain *)
 XSM_HOOK(int, xen_version, uint32_t)
 XSM_HOOK(int, domain_resource_map, struct domain *)
 
+#ifdef CONFIG_ARGO
+XSM_HOOK(int, argo_enable, const struct domain *)
+XSM_HOOK(int, argo_register_single_source, const struct domain *,
+                                           const struct domain *)
+XSM_HOOK(int, argo_register_any_source, const struct domain *)
+XSM_HOOK(int, argo_send, const struct domain *, const struct domain *)
+#endif
+
 #undef XSM_HOOK0
 #undef XSM_HOOK1
 #undef XSM_HOOK2
--- a/xen/include/xsm/xsm.h
+++ b/xen/include/xsm/xsm.h
@@ -90,14 +90,6 @@ struct xsm_ops {
 #ifdef CONFIG_COMPAT
     int (*do_compat_op)(XEN_GUEST_HANDLE_PARAM(void) op);
 #endif
-
-#ifdef CONFIG_ARGO
-    int (*argo_enable)(const struct domain *d);
-    int (*argo_register_single_source)(const struct domain *d,
-                                       const struct domain *t);
-    int (*argo_register_any_source)(const struct domain *d);
-    int (*argo_send)(const struct domain *d, const struct domain *t);
-#endif
 };
 
 #ifdef CONFIG_XSM
@@ -213,30 +205,6 @@ static inline int xsm_do_compat_op(XEN_G
 }
 #endif
 
-#ifdef CONFIG_ARGO
-static inline int xsm_argo_enable(const struct domain *d)
-{
-    return alternative_call(xsm_ops.argo_enable, d);
-}
-
-static inline int xsm_argo_register_single_source(
-    const struct domain *d, const struct domain *t)
-{
-    return alternative_call(xsm_ops.argo_register_single_source, d, t);
-}
-
-static inline int xsm_argo_register_any_source(const struct domain *d)
-{
-    return alternative_call(xsm_ops.argo_register_any_source, d);
-}
-
-static inline int xsm_argo_send(const struct domain *d, const struct domain *t)
-{
-    return alternative_call(xsm_ops.argo_send, d, t);
-}
-
-#endif /* CONFIG_ARGO */
-
 #endif /* XSM_NO_WRAPPERS */
 
 #ifdef CONFIG_MULTIBOOT
--- a/xen/xsm/dummy.c
+++ b/xen/xsm/dummy.c
@@ -40,13 +40,6 @@ static const struct xsm_ops __initconst_
 #ifdef CONFIG_COMPAT
     .do_compat_op                  = xsm_do_compat_op,
 #endif
-
-#ifdef CONFIG_ARGO
-    .argo_enable                   = xsm_argo_enable,
-    .argo_register_single_source   = xsm_argo_register_single_source,
-    .argo_register_any_source      = xsm_argo_register_any_source,
-    .argo_send                     = xsm_argo_send,
-#endif
 };
 
 void __init xsm_fixup_ops(struct xsm_ops *ops)
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -1977,13 +1977,6 @@ static const struct xsm_ops __initconst_
 #ifdef CONFIG_COMPAT
     .do_compat_op = compat_flask_op,
 #endif
-
-#ifdef CONFIG_ARGO
-    .argo_enable = flask_argo_enable,
-    .argo_register_single_source = flask_argo_register_single_source,
-    .argo_register_any_source = flask_argo_register_any_source,
-    .argo_send = flask_argo_send,
-#endif
 };
 
 const struct xsm_ops *__init flask_init(