On Wed, Jan 16, 2019 at 11:27:45PM +0100, Christian Brauner wrote: > This adds the promised selftest for binderfs. It will verify the following > things: > - binderfs mounting works > - binder device allocation works > - performing a binder ioctl() request through a binderfs device works > - binder device removal works > - binder-control removal fails > - binderfs unmounting works > > Cc: Todd Kjos <tkjos@xxxxxxxxxx> > Signed-off-by: Christian Brauner <christian.brauner@xxxxxxxxxx> > --- > /* Changelog */ > > v1: > - check for ENODEV on mount failure to detect whether binderfs is > available > If it is not, skip the test and exit with success. > --- > tools/testing/selftests/Makefile | 1 + > .../selftests/filesystems/binderfs/.gitignore | 1 + > .../selftests/filesystems/binderfs/Makefile | 6 + > .../filesystems/binderfs/binderfs_test.c | 126 ++++++++++++++++++ > .../selftests/filesystems/binderfs/config | 3 + > 5 files changed, 137 insertions(+) > create mode 100644 tools/testing/selftests/filesystems/binderfs/.gitignore > create mode 100644 tools/testing/selftests/filesystems/binderfs/Makefile > create mode 100644 tools/testing/selftests/filesystems/binderfs/binderfs_test.c > create mode 100644 tools/testing/selftests/filesystems/binderfs/config > > diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile > index 1a2bd15c5b6e..400ee81a3043 100644 > --- a/tools/testing/selftests/Makefile > +++ b/tools/testing/selftests/Makefile > @@ -10,6 +10,7 @@ TARGETS += drivers/dma-buf > TARGETS += efivarfs > TARGETS += exec > TARGETS += filesystems > +TARGETS += filesystems/binderfs > TARGETS += firmware > TARGETS += ftrace > TARGETS += futex > diff --git a/tools/testing/selftests/filesystems/binderfs/.gitignore b/tools/testing/selftests/filesystems/binderfs/.gitignore > new file mode 100644 > index 000000000000..8a5d9bf63dd4 > --- /dev/null > +++ b/tools/testing/selftests/filesystems/binderfs/.gitignore > @@ -0,0 +1 @@ > +binderfs_test > diff --git a/tools/testing/selftests/filesystems/binderfs/Makefile b/tools/testing/selftests/filesystems/binderfs/Makefile > new file mode 100644 > index 000000000000..58cb659b56b4 > --- /dev/null > +++ b/tools/testing/selftests/filesystems/binderfs/Makefile > @@ -0,0 +1,6 @@ > +# SPDX-License-Identifier: GPL-2.0 > + > +CFLAGS += -I../../../../../usr/include/ > +TEST_GEN_PROGS := binderfs_test > + > +include ../../lib.mk > diff --git a/tools/testing/selftests/filesystems/binderfs/binderfs_test.c b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c > new file mode 100644 > index 000000000000..34361efcb9c8 > --- /dev/null > +++ b/tools/testing/selftests/filesystems/binderfs/binderfs_test.c > @@ -0,0 +1,126 @@ > +// SPDX-License-Identifier: GPL-2.0 > + > +#define _GNU_SOURCE > +#include <errno.h> > +#include <fcntl.h> > +#include <sched.h> > +#include <stdio.h> > +#include <stdlib.h> > +#include <string.h> > +#include <sys/ioctl.h> > +#include <sys/mount.h> > +#include <sys/stat.h> > +#include <sys/types.h> > +#include <unistd.h> > +#include <linux/android/binder.h> > +#include <linux/android/binderfs.h> > +#include "../../kselftest.h" > + > +int main(int argc, char *argv[]) > +{ > + int fd, ret, saved_errno; > + size_t len; > + struct binderfs_device device = { 0 }; > + struct binder_version version = { 0 }; > + > + ret = unshare(CLONE_NEWNS); > + if (ret < 0) > + ksft_exit_fail_msg("%s - Failed to unshare mount namespace\n", > + strerror(errno)); > + > + ret = mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0); > + if (ret < 0) > + ksft_exit_fail_msg("%s - Failed to mount / as private\n", > + strerror(errno)); > + > + ret = mkdir("/dev/binderfs", 0755); > + if (ret < 0 && errno != EEXIST) > + ksft_exit_fail_msg( > + "%s - Failed to create binderfs mountpoint\n", > + strerror(errno)); > + > + ret = mount(NULL, "/dev/binderfs", "binder", 0, 0); > + if (ret < 0) { > + if (errno != ENODEV) > + ksft_exit_fail_msg("%s - Failed to mount binderfs\n", > + strerror(errno)); > + > + ksft_test_result_skip( > + "The Android binderfs filesystem is not available\n"); > + ksft_exit_pass(); Do you have to clean up your new directory you created and the mount? Or does exiting the code here somehow undo the unshare/mount/mkdir steps above?? Same type of question for the failure paths of the mkdir and mount calls. > + } > + > + /* binderfs mount test passed */ > + ksft_inc_pass_cnt(); > + > + memcpy(device.name, "my-binder", strlen("my-binder")); > + > + fd = open("/dev/binderfs/binder-control", O_RDONLY | O_CLOEXEC); > + if (fd < 0) > + ksft_exit_fail_msg( > + "%s - Failed to open binder-control device\n", > + strerror(errno)); No cleanup? Same for other calls to ksft_exit_fail_msg() later in this file. thanks, greg "error handling is hard!" k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel