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ANDROID: fuse-bpf: Add test for lookup postfilter

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Test: fuse_test passes
Bug: 219958836
Signed-off-by: Paul Lawrence <paullawrence@google.com>

Change-Id: I04a68af274ecf823a96e2f0ead49f56d2f1c1452
This commit is contained in:
Paul Lawrence
2022-08-31 14:41:11 -07:00
parent 494e7075c9
commit 1bd5344779
2 changed files with 72 additions and 1 deletions
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60
tools/testing/selftests/filesystems/fuse/fuse_test.c
View File

@@ -1911,6 +1911,63 @@ out:
return result;
}
static int bpf_test_lookup_postfilter(const char *mount_dir)
{
const char *file1_name = "file1";
const char *file2_name = "file2";
int result = TEST_FAILURE;
int bpf_fd = -1;
int src_fd = -1;
int fuse_dev = -1;
int file_fd = -1;
int pid = -1;
int status;
TEST(file_fd = s_creat(s_path(s(ft_src), s(file1_name)), 0777),
file_fd != -1);
TESTSYSCALL(close(file_fd));
TEST(file_fd = s_creat(s_path(s(ft_src), s(file2_name)), 0777),
file_fd != -1);
TESTSYSCALL(close(file_fd));
file_fd = -1;
TESTEQUAL(install_elf_bpf("test_bpf.bpf", "test_lookup_postfilter",
&bpf_fd, NULL, NULL), 0);
TEST(src_fd = open(ft_src, O_DIRECTORY | O_RDONLY | O_CLOEXEC),
src_fd != -1);
TESTEQUAL(mount_fuse(mount_dir, bpf_fd, src_fd, &fuse_dev), 0);
FUSE_ACTION
int fd = -1;
TESTEQUAL(s_open(s_path(s(mount_dir), s(file1_name)), O_RDONLY),
-1);
TESTEQUAL(errno, ENOENT);
TEST(fd = s_open(s_path(s(mount_dir), s(file2_name)), O_RDONLY),
fd != -1);
TESTSYSCALL(close(fd));
FUSE_DAEMON
struct fuse_entry_out *feo;
struct fuse_entry_bpf_out *febo;
TESTFUSELOOKUP(file1_name, FUSE_POSTFILTER);
TESTFUSEOUTERROR(-ENOENT);
TESTFUSELOOKUP(file2_name, FUSE_POSTFILTER);
feo = (struct fuse_entry_out *) (bytes_in +
sizeof(struct fuse_in_header) + strlen(file2_name) + 1);
febo = (struct fuse_entry_bpf_out *) ((char *)feo +
sizeof(*feo));
TESTFUSEOUT2(fuse_entry_out, *feo, fuse_entry_bpf_out, *febo);
FUSE_DONE
result = TEST_SUCCESS;
out:
close(file_fd);
close(fuse_dev);
umount(mount_dir);
close(src_fd);
close(bpf_fd);
return result;
}
static int parse_options(int argc, char *const *argv)
{
signed char c;
@@ -2017,7 +2074,8 @@ int main(int argc, char *argv[])
MAKE_TEST(bpf_test_lseek),
MAKE_TEST(bpf_test_readdirplus_not_overriding_backing),
MAKE_TEST(bpf_test_no_readdirplus_without_nodeid),
MAKE_TEST(bpf_test_revalidate_handle_backing_fd)
MAKE_TEST(bpf_test_revalidate_handle_backing_fd),
MAKE_TEST(bpf_test_lookup_postfilter),
};
#undef MAKE_TEST

13
tools/testing/selftests/filesystems/fuse/test_bpf.c
View File

@@ -524,3 +524,16 @@ int readdirplus_test(struct fuse_bpf_args *fa)
}
return FUSE_BPF_BACKING;
}
SEC("test_lookup_postfilter")
int lookuppostfilter_test(struct fuse_bpf_args *fa)
{
switch(fa->opcode) {
case FUSE_LOOKUP | FUSE_PREFILTER:
return FUSE_BPF_BACKING | FUSE_BPF_POST_FILTER;
case FUSE_LOOKUP | FUSE_POSTFILTER:
return FUSE_BPF_USER_FILTER;
default:
return FUSE_BPF_BACKING;
}
}