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charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260925-gmem-tmpfs-backend-v1-14-d36159822d18@google.com> References: <20260925-gmem-tmpfs-backend-v1-0-d36159822d18@google.com> In-Reply-To: <20260925-gmem-tmpfs-backend-v1-0-d36159822d18@google.com> To: Hugh Dickins , Baolin Wang , Andrew Morton , Sean Christopherson , Paolo Bonzini , David Hildenbrand , Jonathan Corbet , Shuah Khan , Randy Dunlap , Shuah Khan , vannapurve@google.com, erdemaktas@google.com, jxgao@google.com, rientjes@google.com, fvdl@google.com, jthoughton@google.com, tarunsahu@google.com, pratyush@kernel.org, fuad.tabba@linux.dev, Gregory Price , David Woodhouse , yan.y.zhao@intel.com, michael.roth@amd.com, suzuki.poulose@arm.com, Christian Brauner , Jason Gunthorpe , Nicolin Chen , Xu Yilun , aik@amd.com, aneesh.kumar@kernel.org, Vlastimil Babka Cc: kernel-team@android.com, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Ackerley Tng X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; 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Signed-off-by: Ackerley Tng --- tools/testing/selftests/kvm/guest_memfd_test.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c index 81311be059923..4610eeab39be6 100644 --- a/tools/testing/selftests/kvm/guest_memfd_test.c +++ b/tools/testing/selftests/kvm/guest_memfd_test.c @@ -19,6 +19,7 @@ #include #include #include +#include #include "kvm_syscalls.h" #include "kvm_util.h" @@ -545,7 +546,8 @@ static void test_resource_fd_tmpfs_huge(struct kvm_vm *vm) static void test_resource_fd_tmpfs_shared_pool(struct kvm_vm *vm) { - int pool_fd, fd1, fd2; + int pool_fd, fd1, fd2, ret; + struct statvfs svfs; struct stat st1, st2; pool_fd = create_tmpfs_pool_fd("never", true, page_size * 2); @@ -573,6 +575,18 @@ static void test_resource_fd_tmpfs_shared_pool(struct kvm_vm *vm) TEST_ASSERT(st1.st_ino != st2.st_ino, "different guest_memfd instances should have distinct inodes"); + ret = fallocate(fd1, FALLOC_FL_KEEP_SIZE, 0, page_size); + TEST_ASSERT(!ret, "fallocate on fd1 should succeed"); + + TEST_ASSERT(!fstatvfs(pool_fd, &svfs), "fstatvfs on pool_fd should succeed"); + TEST_ASSERT_EQ(svfs.f_blocks - svfs.f_bfree, 1); + + ret = fallocate(fd2, FALLOC_FL_KEEP_SIZE, 0, page_size); + TEST_ASSERT(!ret, "fallocate on fd2 should succeed"); + + TEST_ASSERT(!fstatvfs(pool_fd, &svfs), "fstatvfs on pool_fd should succeed"); + TEST_ASSERT_EQ(svfs.f_blocks - svfs.f_bfree, 2); + close(fd2); close(fd1); close(pool_fd); -- 2.56.0.rc1.315.gc6ed9934b7-goog