Google
  Web www.spinics.net

[PATCH 2/2] KVM: cleanup: centralize get_dirty_log ioctl

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


We move sanity check and lock related parts to the arch independent code.
This will help future cleanups.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@xxxxxxxxxxxxx>
---
 arch/ia64/kvm/kvm-ia64.c  |   14 ++------------
 arch/powerpc/kvm/book3s.c |   14 ++------------
 arch/powerpc/kvm/booke.c  |    2 +-
 arch/s390/kvm/kvm-s390.c  |    4 ++--
 arch/x86/kvm/x86.c        |   14 ++------------
 include/linux/kvm_host.h  |    4 ++--
 virt/kvm/kvm_main.c       |   24 ++++++++++++++++++++++++
 7 files changed, 35 insertions(+), 41 deletions(-)

diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index c3754bb..72efc39 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1815,24 +1815,15 @@ static void kvm_ia64_sync_dirty_log(struct kvm *kvm,
 	spin_unlock(&kvm->arch.dirty_log_lock);
 }
 
-int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
-		struct kvm_dirty_log *log)
+int kvm_arch_get_dirty_log(struct kvm *kvm,
+			   struct kvm_dirty_log *log)
 {
 	int r, i;
 	unsigned long n;
 	struct kvm_memory_slot *memslot;
 	unsigned long is_dirty = 0;
 
-	mutex_lock(&kvm->slots_lock);
-
-	r = -EINVAL;
-	if (log->slot >= KVM_MEMORY_SLOTS)
-		goto out;
-
 	memslot = &kvm->memslots->memslots[log->slot];
-	r = -ENOENT;
-	if (!memslot->dirty_bitmap)
-		goto out;
 
 	kvm_ia64_sync_dirty_log(kvm, memslot);
 
@@ -1852,7 +1843,6 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 	}
 	r = 0;
 out:
-	mutex_unlock(&kvm->slots_lock);
 	return r;
 }
 
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 691ac31..f9b1290 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -1239,8 +1239,8 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 /*
  * Get (and clear) the dirty memory log for a memory slot.
  */
-int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
-				      struct kvm_dirty_log *log)
+int kvm_arch_get_dirty_log(struct kvm *kvm,
+			   struct kvm_dirty_log *log)
 {
 	struct kvm_memory_slot *memslot;
 	struct kvm_vcpu *vcpu;
@@ -1249,16 +1249,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 	int r, i;
 	unsigned long n;
 
-	mutex_lock(&kvm->slots_lock);
-
-	r = -EINVAL;
-	if (log->slot >= KVM_MEMORY_SLOTS)
-		goto out;
-
 	memslot = &kvm->memslots->memslots[log->slot];
-	r = -ENOENT;
-	if (!memslot->dirty_bitmap)
-		goto out;
 
 	n = kvm_dirty_bitmap_bytes(memslot);
 
@@ -1282,7 +1273,6 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 
 	r = 0;
 out:
-	mutex_unlock(&kvm->slots_lock);
 	return r;
 }
 
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index c604277..5eb64b9 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -596,7 +596,7 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 	return r;
 }
 
-int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
+int kvm_arch_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 {
 	return -ENOTSUPP;
 }
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 4fe6865..09b7885 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -134,8 +134,8 @@ int kvm_dev_ioctl_check_extension(long ext)
 /*
  * Get (and clear) the dirty memory log for a memory slot.
  */
-int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
-			       struct kvm_dirty_log *log)
+int kvm_arch_get_dirty_log(struct kvm *kvm,
+			   struct kvm_dirty_log *log)
 {
 	return 0;
 }
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6e6659d..ecb5350 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3019,24 +3019,15 @@ static int kvm_vm_ioctl_reinject(struct kvm *kvm,
 /*
  * Get (and clear) the dirty memory log for a memory slot.
  */
-int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
-				      struct kvm_dirty_log *log)
+int kvm_arch_get_dirty_log(struct kvm *kvm,
+			   struct kvm_dirty_log *log)
 {
 	int r, i;
 	struct kvm_memory_slot *memslot;
 	unsigned long n;
 	unsigned long is_dirty = 0;
 
-	mutex_lock(&kvm->slots_lock);
-
-	r = -EINVAL;
-	if (log->slot >= KVM_MEMORY_SLOTS)
-		goto out;
-
 	memslot = &kvm->memslots->memslots[log->slot];
-	r = -ENOENT;
-	if (!memslot->dirty_bitmap)
-		goto out;
 
 	n = kvm_dirty_bitmap_bytes(memslot);
 
@@ -3087,7 +3078,6 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 
 	r = 0;
 out:
-	mutex_unlock(&kvm->slots_lock);
 	return r;
 }
 
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 91ee311..0773d56 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -342,8 +342,8 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
 
 int kvm_dev_ioctl_check_extension(long ext);
 
-int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
-				struct kvm_dirty_log *log);
+int kvm_arch_get_dirty_log(struct kvm *kvm,
+			   struct kvm_dirty_log *log);
 
 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 				   struct
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 39b4512..cdfe32a 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -776,6 +776,30 @@ int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 	return kvm_set_memory_region(kvm, mem, user_alloc);
 }
 
+static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
+				      struct kvm_dirty_log *log)
+{
+	struct kvm_memory_slot *memslot;
+	int r;
+
+	mutex_lock(&kvm->slots_lock);
+
+	r = -EINVAL;
+	if (log->slot >= KVM_MEMORY_SLOTS)
+		goto out;
+
+	memslot = &kvm->memslots->memslots[log->slot];
+	r = -ENOENT;
+	if (!memslot->dirty_bitmap)
+		goto out;
+
+	r = kvm_arch_get_dirty_log(kvm, log);
+
+out:
+	mutex_unlock(&kvm->slots_lock);
+	return r;
+}
+
 void kvm_disable_largepages(void)
 {
 	largepages_enabled = false;
-- 
1.7.0.4

--
To unsubscribe from this list: send the line "unsubscribe kvm-ia64" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Home]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Photo]     [Yosemite News]    [Yosemite Photos]    [Video Projectors]     [PDAs]     [Free Online Dating]     [Hacking TiVo]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Devices]     [Big List of Linux Books]     [16.7MP]

  Powered by Linux