diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/syscalls/linux/stat.cc | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/syscalls/linux/stat.cc b/test/syscalls/linux/stat.cc index f96da5706..553fb7e56 100644 --- a/test/syscalls/linux/stat.cc +++ b/test/syscalls/linux/stat.cc @@ -429,6 +429,39 @@ TEST_F(StatTest, LstatELOOPPath) { ASSERT_THAT(lstat(path.c_str(), &s), SyscallFailsWithErrno(ELOOP)); } +// Ensure that inode allocation for anonymous devices work correctly across +// save/restore. In particular, inode numbers should be unique across S/R. +TEST(SimpleStatTest, AnonDeviceAllocatesUniqueInodesAcrossSaveRestore) { + // Use sockets as a convenient way to create inodes on an anonymous device. + int fd; + ASSERT_THAT(fd = socket(AF_UNIX, SOCK_STREAM, 0), SyscallSucceeds()); + FileDescriptor fd1(fd); + MaybeSave(); + ASSERT_THAT(fd = socket(AF_UNIX, SOCK_STREAM, 0), SyscallSucceeds()); + FileDescriptor fd2(fd); + + struct stat st1; + struct stat st2; + ASSERT_THAT(fstat(fd1.get(), &st1), SyscallSucceeds()); + ASSERT_THAT(fstat(fd2.get(), &st2), SyscallSucceeds()); + + // The two fds should have different inode numbers. Specifically, since fd2 + // was created later, it should have a higher inode number. + EXPECT_GT(st2.st_ino, st1.st_ino); + + // Verify again after another S/R cycle. The inode numbers should remain the + // same. + MaybeSave(); + + struct stat st1_after; + struct stat st2_after; + ASSERT_THAT(fstat(fd1.get(), &st1_after), SyscallSucceeds()); + ASSERT_THAT(fstat(fd2.get(), &st2_after), SyscallSucceeds()); + + EXPECT_EQ(st1_after.st_ino, st1.st_ino); + EXPECT_EQ(st2_after.st_ino, st2.st_ino); +} + } // namespace } // namespace testing |