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| author |   Avi Kivity <avi@qumranet.com> | 2007-03-07 13:11:17 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-05-03 10:52:25 +0300 |
| commit | f0fe510864a4520a85dfa35ae14f5f376c56efc7 (patch) | |
| tree | 3d6422576b072480b78b3b505ec03d98ab21c0c3 /drivers/kvm/kvm_main.c | |
| parent | KVM: Allow kernel to select size of mmap() buffer (diff) | |
| download | linux-dev-f0fe510864a4520a85dfa35ae14f5f376c56efc7.tar.xz linux-dev-f0fe510864a4520a85dfa35ae14f5f376c56efc7.zip | |
KVM: Future-proof argument-less ioctls
Some ioctls ignore their arguments. By requiring them to be zero now,
we allow a nonzero value to have some special meaning in the future.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/kvm_main.c')
| -rw-r--r-- | drivers/kvm/kvm_main.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index cba0b87c34e4..ba7f43a4459e 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -2169,6 +2169,9 @@ static long kvm_vcpu_ioctl(struct file *filp, switch (ioctl) { case KVM_RUN: + r = -EINVAL; + if (arg) + goto out; r = kvm_vcpu_ioctl_run(vcpu, vcpu->run); break; case KVM_GET_REGS: { @@ -2440,9 +2443,15 @@ static long kvm_dev_ioctl(struct file *filp, switch (ioctl) { case KVM_GET_API_VERSION: + r = -EINVAL; + if (arg) + goto out; r = KVM_API_VERSION; break; case KVM_CREATE_VM: + r = -EINVAL; + if (arg) + goto out; r = kvm_dev_ioctl_create_vm(); break; case KVM_GET_MSR_INDEX_LIST: { |