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Ayush RanjanandgVisor bot
d1c4ffbdd8
We were already returning this large size via statfs(2). But there was no accounting being done against it. Even after page allocations, there was no change in values returned by statfs(2) about number of pages free. PHP runtime test ext/standard/tests/file/disk_free_space_basic.phpt and Python runtime test test_shutil tests for this. This change is required to get these tests to pass with overlayfs. PiperOrigin-RevId: 493903408
115 lines
3.6 KiB
C++
115 lines
3.6 KiB
C++
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <fcntl.h>
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#include <linux/magic.h>
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#include <sys/statfs.h>
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#include <unistd.h>
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#include "gtest/gtest.h"
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#include "test/util/file_descriptor.h"
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#include "test/util/fs_util.h"
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#include "test/util/temp_path.h"
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#include "test/util/test_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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TEST(StatfsTest, CannotStatBadPath) {
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auto temp_file = NewTempAbsPath();
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struct statfs st;
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EXPECT_THAT(statfs(temp_file.c_str(), &st), SyscallFailsWithErrno(ENOENT));
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}
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TEST(StatfsTest, TempPath) {
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auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
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struct statfs st;
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EXPECT_THAT(statfs(temp_file.path().c_str(), &st), SyscallSucceeds());
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EXPECT_GT(st.f_namelen, 0);
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}
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TEST(StatfsTest, InternalDevShm) {
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struct statfs st;
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EXPECT_THAT(statfs("/dev/shm", &st), SyscallSucceeds());
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EXPECT_GT(st.f_namelen, 0);
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// This assumes that /dev/shm is tmpfs.
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// Note: We could be an overlay on some configurations.
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EXPECT_TRUE(st.f_type == TMPFS_MAGIC || st.f_type == OVERLAYFS_SUPER_MAGIC);
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}
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TEST(FstatfsTest, CannotStatBadFd) {
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struct statfs st;
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EXPECT_THAT(fstatfs(-1, &st), SyscallFailsWithErrno(EBADF));
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}
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TEST(FstatfsTest, TempPath) {
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auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file.path(), O_RDONLY));
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struct statfs st;
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EXPECT_THAT(fstatfs(fd.get(), &st), SyscallSucceeds());
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EXPECT_GT(st.f_namelen, 0);
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}
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TEST(FstatfsTest, CanStatFileWithOpath) {
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auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file.path(), O_PATH));
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struct statfs st;
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EXPECT_THAT(fstatfs(fd.get(), &st), SyscallSucceeds());
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}
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TEST(FstatfsTest, InternalDevShm) {
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auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/shm", O_RDONLY));
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struct statfs st;
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EXPECT_THAT(fstatfs(fd.get(), &st), SyscallSucceeds());
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EXPECT_GT(st.f_namelen, 0);
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// This assumes that /dev/shm is tmpfs.
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// Note: We could be an overlay on some configurations.
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EXPECT_TRUE(st.f_type == TMPFS_MAGIC || st.f_type == OVERLAYFS_SUPER_MAGIC);
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}
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// Tests that the number of blocks free in the filesystem, as reported by
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// statfs(2) updates appropriately when pages are allocated.
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TEST(FstatfsTest, BlocksFree) {
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const std::string file_path = NewTempAbsPath();
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const std::string dir = std::string(Dirname(file_path));
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struct statfs st_before;
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EXPECT_THAT(statfs(dir.c_str(), &st_before), SyscallSucceeds());
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// Only test for tmpfs. Passthru gofer does not expose host filesystem
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// statfs(2) results. It always returns 0 for blocks free.
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SKIP_IF(st_before.f_type != TMPFS_MAGIC);
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ASSERT_NO_ERRNO(CreateWithContents(file_path, "abcd"));
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struct statfs st_after;
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EXPECT_THAT(statfs(dir.c_str(), &st_after), SyscallSucceeds());
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EXPECT_GT(st_before.f_bfree, st_after.f_bfree);
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EXPECT_GT(st_before.f_bavail, st_after.f_bavail);
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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