This patch series adds an automated test for the vhost-user-fs device using
virtiofsd. This makes low-level testing of FUSE messages and even VIRTIO
possible. These things can be hard to do inside a normal guest environment
where such tests require building kernel modules and can result in kernel
panics.
To get a feel for how vhost-user-fs-test.c test cases work, here is an example:
/* Create file on host and check its contents and metadata in guest */
static void test_file_from_host(void *parent, void *arg, QGuestAllocator
*alloc)
{
g_autofree gchar *filename = g_strdup_printf("%s/%s", shared_dir, "foo");
const char *str = "This is a test\n";
char buf[strlen(str)];
QVirtioFS *vfs = parent;
struct fuse_entry_out entry;
int32_t error;
uint64_t nodeid;
uint64_t fh;
ssize_t nread;
gboolean ok;
SKIP_TEST_IF_CROSS_ENDIAN();
/* Create the test file in the shared directory */
ok = g_file_set_contents(filename, str, strlen(str), NULL);
g_assert(ok);
fuse_init(vfs);
error = fuse_lookup(vfs, FUSE_ROOT_ID, "foo", &entry);
g_assert_cmpint(error, ==, 0);
g_assert_cmpint(guest64(entry.attr.size), ==, strlen(str));
nodeid = guest64(entry.nodeid);
error = fuse_open(vfs, nodeid, O_RDONLY, &fh);
g_assert_cmpint(error, ==, 0);
nread = fuse_read(vfs, fh, 0, buf, sizeof(buf));
g_assert_cmpint(nread, ==, sizeof(buf));
g_assert_cmpint(memcmp(buf, str, sizeof(buf)), ==, 0);
fuse_release(vfs, fh);
fuse_forget(vfs, nodeid);
}
This patch series is based on "[PATCH v4 00/16] libqos: add VIRTIO PCI 1.0
support" and the https://gitlab.com/virtio-fs/qemu virtio-fs-dev branch. I
expect conflicts and will resend again once these dependencies have landed in
qemu.git/master.
Stefan Hajnoczi (3):
WIP virtiofsd: import Linux <fuse.h> header file
qgraph: add an "after" test callback function
tests/vhost-user-fs-test: add vhost-user-fs test case
tests/Makefile.include | 8 +-
contrib/virtiofsd/fuse_lowlevel.h | 2 +-
.../standard-headers/linux/fuse.h | 0
tests/libqos/qgraph.h | 2 +
tests/libqos/qgraph_internal.h | 1 +
tests/libqos/virtio-fs.h | 46 ++
contrib/virtiofsd/fuse_loop_mt.c | 2 +-
contrib/virtiofsd/fuse_lowlevel.c | 2 +-
contrib/virtiofsd/fuse_virtio.c | 2 +-
tests/libqos/qgraph.c | 1 +
tests/libqos/virtio-fs.c | 104 +++
tests/qos-test.c | 6 +
tests/vhost-user-fs-test.c | 660 ++++++++++++++++++
scripts/update-linux-headers.sh | 3 +-
14 files changed, 832 insertions(+), 7 deletions(-)
rename contrib/virtiofsd/fuse_kernel.h =>
include/standard-headers/linux/fuse.h (100%)
create mode 100644 tests/libqos/virtio-fs.h
create mode 100644 tests/libqos/virtio-fs.c
create mode 100644 tests/vhost-user-fs-test.c
--
2.21.0
