[Xen-devel] [PATCH v2 02/10] vm_event: Remove "ring" suffix from vm_event_check_ring

[Petre Pircalabu <ppircalabu@bitdefender.com>]

Decouple implementation from interface to allow vm_event_check to be
used regardless of the vm_event underlying implementation.

Signed-off-by: Petre Pircalabu <ppircalabu@bitdefender.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
---
 xen/arch/arm/mem_access.c     |  2 +-
 xen/arch/x86/mm/mem_access.c  |  4 ++--
 xen/arch/x86/mm/mem_paging.c  |  2 +-
 xen/common/mem_access.c       |  2 +-
 xen/common/vm_event.c         | 24 ++++++++++++------------
 xen/drivers/passthrough/pci.c |  2 +-
 xen/include/xen/vm_event.h    |  4 ++--
 7 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/xen/arch/arm/mem_access.c b/xen/arch/arm/mem_access.c
index 3e36202..d54760b 100644
--- a/xen/arch/arm/mem_access.c
+++ b/xen/arch/arm/mem_access.c
@@ -290,7 +290,7 @@ bool p2m_mem_access_check(paddr_t gpa, vaddr_t gla, const struct npfec npfec)
     }
 
     /* Otherwise, check if there is a vm_event monitor subscriber */
-    if ( !vm_event_check_ring(v->domain->vm_event_monitor) )
+    if ( !vm_event_check(v->domain->vm_event_monitor) )
     {
         /* No listener */
         if ( p2m->access_required )
diff --git a/xen/arch/x86/mm/mem_access.c b/xen/arch/x86/mm/mem_access.c
index 0144f92..640352e 100644
--- a/xen/arch/x86/mm/mem_access.c
+++ b/xen/arch/x86/mm/mem_access.c
@@ -182,7 +182,7 @@ bool p2m_mem_access_check(paddr_t gpa, unsigned long gla,
     gfn_unlock(p2m, gfn, 0);
 
     /* Otherwise, check if there is a memory event listener, and send the message along */
-    if ( !vm_event_check_ring(d->vm_event_monitor) || !req_ptr )
+    if ( !vm_event_check(d->vm_event_monitor) || !req_ptr )
     {
         /* No listener */
         if ( p2m->access_required )
@@ -210,7 +210,7 @@ bool p2m_mem_access_check(paddr_t gpa, unsigned long gla,
             return true;
         }
     }
-    if ( vm_event_check_ring(d->vm_event_monitor) &&
+    if ( vm_event_check(d->vm_event_monitor) &&
          d->arch.monitor.inguest_pagefault_disabled &&
          npfec.kind != npfec_kind_with_gla ) /* don't send a mem_event */
     {
diff --git a/xen/arch/x86/mm/mem_paging.c b/xen/arch/x86/mm/mem_paging.c
index 54a94fa..dc2a59a 100644
--- a/xen/arch/x86/mm/mem_paging.c
+++ b/xen/arch/x86/mm/mem_paging.c
@@ -44,7 +44,7 @@ int mem_paging_memop(XEN_GUEST_HANDLE_PARAM(xen_mem_paging_op_t) arg)
         goto out;
 
     rc = -ENODEV;
-    if ( unlikely(!vm_event_check_ring(d->vm_event_paging)) )
+    if ( unlikely(!vm_event_check(d->vm_event_paging)) )
         goto out;
 
     switch( mpo.op )
diff --git a/xen/common/mem_access.c b/xen/common/mem_access.c
index 010e6f8..51e4e2b 100644
--- a/xen/common/mem_access.c
+++ b/xen/common/mem_access.c
@@ -52,7 +52,7 @@ int mem_access_memop(unsigned long cmd,
         goto out;
 
     rc = -ENODEV;
-    if ( unlikely(!vm_event_check_ring(d->vm_event_monitor)) )
+    if ( unlikely(!vm_event_check(d->vm_event_monitor)) )
         goto out;
 
     switch ( mao.op )
diff --git a/xen/common/vm_event.c b/xen/common/vm_event.c
index 56b506a..515a917 100644
--- a/xen/common/vm_event.c
+++ b/xen/common/vm_event.c
@@ -179,7 +179,7 @@ static int vm_event_disable(struct domain *d, struct vm_event_domain **p_ved)
 {
     struct vm_event_domain *ved = *p_ved;
 
-    if ( vm_event_check_ring(ved) )
+    if ( vm_event_check(ved) )
     {
         struct vcpu *v;
 
@@ -259,7 +259,7 @@ void vm_event_put_request(struct domain *d,
     RING_IDX req_prod;
     struct vcpu *curr = current;
 
-    if( !vm_event_check_ring(ved) )
+    if( !vm_event_check(ved) )
         return;
 
     if ( curr->domain != d )
@@ -362,7 +362,7 @@ static int vm_event_resume(struct domain *d, struct vm_event_domain *ved)
      */
     ASSERT(d != current->domain);
 
-    if ( unlikely(!vm_event_check_ring(ved)) )
+    if ( unlikely(!vm_event_check(ved)) )
          return -ENODEV;
 
     /* Pull all responses off the ring. */
@@ -433,7 +433,7 @@ static int vm_event_resume(struct domain *d, struct vm_event_domain *ved)
 
 void vm_event_cancel_slot(struct domain *d, struct vm_event_domain *ved)
 {
-    if( !vm_event_check_ring(ved) )
+    if( !vm_event_check(ved) )
         return;
 
     spin_lock(&ved->lock);
@@ -488,7 +488,7 @@ static int vm_event_wait_slot(struct vm_event_domain *ved)
     return rc;
 }
 
-bool vm_event_check_ring(struct vm_event_domain *ved)
+bool vm_event_check(struct vm_event_domain *ved)
 {
     return ved && ved->ring_page;
 }
@@ -508,7 +508,7 @@ bool vm_event_check_ring(struct vm_event_domain *ved)
 int __vm_event_claim_slot(struct domain *d, struct vm_event_domain *ved,
                           bool allow_sleep)
 {
-    if ( !vm_event_check_ring(ved) )
+    if ( !vm_event_check(ved) )
         return -EOPNOTSUPP;
 
     if ( (current->domain == d) && allow_sleep )
@@ -543,7 +543,7 @@ static void mem_sharing_notification(struct vcpu *v, unsigned int port)
 void vm_event_cleanup(struct domain *d)
 {
 #ifdef CONFIG_HAS_MEM_PAGING
-    if ( vm_event_check_ring(d->vm_event_paging) )
+    if ( vm_event_check(d->vm_event_paging) )
     {
         /* Destroying the wait queue head means waking up all
          * queued vcpus. This will drain the list, allowing
@@ -556,13 +556,13 @@ void vm_event_cleanup(struct domain *d)
         (void)vm_event_disable(d, &d->vm_event_paging);
     }
 #endif
-    if ( vm_event_check_ring(d->vm_event_monitor) )
+    if ( vm_event_check(d->vm_event_monitor) )
     {
         destroy_waitqueue_head(&d->vm_event_monitor->wq);
         (void)vm_event_disable(d, &d->vm_event_monitor);
     }
 #ifdef CONFIG_HAS_MEM_SHARING
-    if ( vm_event_check_ring(d->vm_event_share) )
+    if ( vm_event_check(d->vm_event_share) )
     {
         destroy_waitqueue_head(&d->vm_event_share->wq);
         (void)vm_event_disable(d, &d->vm_event_share);
@@ -646,7 +646,7 @@ int vm_event_domctl(struct domain *d, struct xen_domctl_vm_event_op *vec)
         break;
 
         case XEN_VM_EVENT_DISABLE:
-            if ( vm_event_check_ring(d->vm_event_paging) )
+            if ( vm_event_check(d->vm_event_paging) )
             {
                 domain_pause(d);
                 rc = vm_event_disable(d, &d->vm_event_paging);
@@ -683,7 +683,7 @@ int vm_event_domctl(struct domain *d, struct xen_domctl_vm_event_op *vec)
             break;
 
         case XEN_VM_EVENT_DISABLE:
-            if ( vm_event_check_ring(d->vm_event_monitor) )
+            if ( vm_event_check(d->vm_event_monitor) )
             {
                 domain_pause(d);
                 rc = vm_event_disable(d, &d->vm_event_monitor);
@@ -728,7 +728,7 @@ int vm_event_domctl(struct domain *d, struct xen_domctl_vm_event_op *vec)
             break;
 
         case XEN_VM_EVENT_DISABLE:
-            if ( vm_event_check_ring(d->vm_event_share) )
+            if ( vm_event_check(d->vm_event_share) )
             {
                 domain_pause(d);
                 rc = vm_event_disable(d, &d->vm_event_share);
diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
index e886894..eec7686 100644
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -1451,7 +1451,7 @@ static int assign_device(struct domain *d, u16 seg, u8 bus, u8 devfn, u32 flag)
     /* Prevent device assign if mem paging or mem sharing have been 
      * enabled for this domain */
     if ( unlikely(d->arch.hvm.mem_sharing_enabled ||
-                  vm_event_check_ring(d->vm_event_paging) ||
+                  vm_event_check(d->vm_event_paging) ||
                   p2m_get_hostp2m(d)->global_logdirty) )
         return -EXDEV;
 
diff --git a/xen/include/xen/vm_event.h b/xen/include/xen/vm_event.h
index 3cc2b20..381be0b 100644
--- a/xen/include/xen/vm_event.h
+++ b/xen/include/xen/vm_event.h
@@ -29,8 +29,8 @@
 /* Clean up on domain destruction */
 void vm_event_cleanup(struct domain *d);
 
-/* Returns whether a ring has been set up */
-bool vm_event_check_ring(struct vm_event_domain *ved);
+/* Returns whether the VM event domain has been set up */
+bool vm_event_check(struct vm_event_domain *ved);
 
 /* Returns 0 on success, -ENOSYS if there is no ring, -EBUSY if there is no
  * available space and the caller is a foreign domain. If the guest itself
-- 
2.7.4


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