| Message ID | 20200408220818.4306-2-wainersm@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | selftests: kvm: Introduce the mem_slot_test test | expand |
On 4/8/20 3:08 PM, Wainer dos Santos Moschetta wrote: > Introduces the vm_get_fd() function in kvm_util which returns > the VM file descriptor. > > Reviewed-by: Andrew Jones <drjones@redhat.com> > Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> > --- > tools/testing/selftests/kvm/include/kvm_util.h | 1 + > tools/testing/selftests/kvm/lib/kvm_util.c | 5 +++++ > 2 files changed, 6 insertions(+) > > diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h > index a99b875f50d2..4e122819ee24 100644 > --- a/tools/testing/selftests/kvm/include/kvm_util.h > +++ b/tools/testing/selftests/kvm/include/kvm_util.h > @@ -254,6 +254,7 @@ bool vm_is_unrestricted_guest(struct kvm_vm *vm); > unsigned int vm_get_page_size(struct kvm_vm *vm); > unsigned int vm_get_page_shift(struct kvm_vm *vm); > unsigned int vm_get_max_gfn(struct kvm_vm *vm); > +int vm_get_fd(struct kvm_vm *vm); > > unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size); > unsigned int vm_num_host_pages(enum vm_guest_mode mode, unsigned int num_guest_pages); > diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c > index 8a3523d4434f..3e36a1eb8771 100644 > --- a/tools/testing/selftests/kvm/lib/kvm_util.c > +++ b/tools/testing/selftests/kvm/lib/kvm_util.c > @@ -1734,6 +1734,11 @@ unsigned int vm_get_max_gfn(struct kvm_vm *vm) > return vm->max_gfn; > } > > +int vm_get_fd(struct kvm_vm *vm) > +{ > + return vm->fd; > +} > + I am just trying to understand why we need a separate function when the 'vm' variable is all local within the same file. There are a number of places in kvm_util.c where it is used directly. > static unsigned int vm_calc_num_pages(unsigned int num_pages, > unsigned int page_shift, > unsigned int new_page_shift,
On 4/8/20 10:25 PM, Krish Sadhukhan wrote: > > On 4/8/20 3:08 PM, Wainer dos Santos Moschetta wrote: >> Introduces the vm_get_fd() function in kvm_util which returns >> the VM file descriptor. >> >> Reviewed-by: Andrew Jones <drjones@redhat.com> >> Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> >> --- >> tools/testing/selftests/kvm/include/kvm_util.h | 1 + >> tools/testing/selftests/kvm/lib/kvm_util.c | 5 +++++ >> 2 files changed, 6 insertions(+) >> >> diff --git a/tools/testing/selftests/kvm/include/kvm_util.h >> b/tools/testing/selftests/kvm/include/kvm_util.h >> index a99b875f50d2..4e122819ee24 100644 >> --- a/tools/testing/selftests/kvm/include/kvm_util.h >> +++ b/tools/testing/selftests/kvm/include/kvm_util.h >> @@ -254,6 +254,7 @@ bool vm_is_unrestricted_guest(struct kvm_vm *vm); >> unsigned int vm_get_page_size(struct kvm_vm *vm); >> unsigned int vm_get_page_shift(struct kvm_vm *vm); >> unsigned int vm_get_max_gfn(struct kvm_vm *vm); >> +int vm_get_fd(struct kvm_vm *vm); >> unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, >> size_t size); >> unsigned int vm_num_host_pages(enum vm_guest_mode mode, unsigned >> int num_guest_pages); >> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c >> b/tools/testing/selftests/kvm/lib/kvm_util.c >> index 8a3523d4434f..3e36a1eb8771 100644 >> --- a/tools/testing/selftests/kvm/lib/kvm_util.c >> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c >> @@ -1734,6 +1734,11 @@ unsigned int vm_get_max_gfn(struct kvm_vm *vm) >> return vm->max_gfn; >> } >> +int vm_get_fd(struct kvm_vm *vm) >> +{ >> + return vm->fd; >> +} >> + > > > I am just trying to understand why we need a separate function when > the 'vm' variable is all local within the same file. There are a > number of places in kvm_util.c where it is used directly. The problem is to access of kvm_vm attributes outside of kvm_utils.c. For example, if I try to vm->fd in my test I get the compiler error: mem_slot_test.c: In function ‘test_add_max_slots’: mem_slot_test.c:62:16: error: dereferencing pointer to incomplete type ‘struct kvm_vm’ ret = ioctl(vm->fd, KVM_SET_USER_MEMORY_REGION, ^~ > > >> static unsigned int vm_calc_num_pages(unsigned int num_pages, >> unsigned int page_shift, >> unsigned int new_page_shift, >
On 4/8/20 7:45 PM, Wainer dos Santos Moschetta wrote: > > On 4/8/20 10:25 PM, Krish Sadhukhan wrote: >> >> On 4/8/20 3:08 PM, Wainer dos Santos Moschetta wrote: >>> Introduces the vm_get_fd() function in kvm_util which returns >>> the VM file descriptor. >>> >>> Reviewed-by: Andrew Jones <drjones@redhat.com> >>> Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> >>> --- >>> tools/testing/selftests/kvm/include/kvm_util.h | 1 + >>> tools/testing/selftests/kvm/lib/kvm_util.c | 5 +++++ >>> 2 files changed, 6 insertions(+) >>> >>> diff --git a/tools/testing/selftests/kvm/include/kvm_util.h >>> b/tools/testing/selftests/kvm/include/kvm_util.h >>> index a99b875f50d2..4e122819ee24 100644 >>> --- a/tools/testing/selftests/kvm/include/kvm_util.h >>> +++ b/tools/testing/selftests/kvm/include/kvm_util.h >>> @@ -254,6 +254,7 @@ bool vm_is_unrestricted_guest(struct kvm_vm *vm); >>> unsigned int vm_get_page_size(struct kvm_vm *vm); >>> unsigned int vm_get_page_shift(struct kvm_vm *vm); >>> unsigned int vm_get_max_gfn(struct kvm_vm *vm); >>> +int vm_get_fd(struct kvm_vm *vm); >>> unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, >>> size_t size); >>> unsigned int vm_num_host_pages(enum vm_guest_mode mode, unsigned >>> int num_guest_pages); >>> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c >>> b/tools/testing/selftests/kvm/lib/kvm_util.c >>> index 8a3523d4434f..3e36a1eb8771 100644 >>> --- a/tools/testing/selftests/kvm/lib/kvm_util.c >>> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c >>> @@ -1734,6 +1734,11 @@ unsigned int vm_get_max_gfn(struct kvm_vm *vm) >>> return vm->max_gfn; >>> } >>> +int vm_get_fd(struct kvm_vm *vm) >>> +{ >>> + return vm->fd; >>> +} >>> + >> >> >> I am just trying to understand why we need a separate function when >> the 'vm' variable is all local within the same file. There are a >> number of places in kvm_util.c where it is used directly. > > > The problem is to access of kvm_vm attributes outside of kvm_utils.c. > For example, if I try to vm->fd in my test I get the compiler error: > > mem_slot_test.c: In function ‘test_add_max_slots’: > mem_slot_test.c:62:16: error: dereferencing pointer to incomplete type > ‘struct kvm_vm’ > ret = ioctl(vm->fd, KVM_SET_USER_MEMORY_REGION, > ^~ My bad ! I missed the fact that the structure is defined in kvm_util_internal.h and not in kvm_util.h. Reviewed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com> > >> >> >>> static unsigned int vm_calc_num_pages(unsigned int num_pages, >>> unsigned int page_shift, >>> unsigned int new_page_shift, >> >
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index a99b875f50d2..4e122819ee24 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -254,6 +254,7 @@ bool vm_is_unrestricted_guest(struct kvm_vm *vm); unsigned int vm_get_page_size(struct kvm_vm *vm); unsigned int vm_get_page_shift(struct kvm_vm *vm); unsigned int vm_get_max_gfn(struct kvm_vm *vm); +int vm_get_fd(struct kvm_vm *vm); unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size); unsigned int vm_num_host_pages(enum vm_guest_mode mode, unsigned int num_guest_pages); diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 8a3523d4434f..3e36a1eb8771 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -1734,6 +1734,11 @@ unsigned int vm_get_max_gfn(struct kvm_vm *vm) return vm->max_gfn; } +int vm_get_fd(struct kvm_vm *vm) +{ + return vm->fd; +} + static unsigned int vm_calc_num_pages(unsigned int num_pages, unsigned int page_shift, unsigned int new_page_shift,