* [PATCH v3] selftests: filesystems: Add functional test for the abort file in fusectl
@ 2025-05-26 1:42 Chen Linxuan
2025-05-26 5:58 ` Amir Goldstein
0 siblings, 1 reply; 2+ messages in thread
From: Chen Linxuan @ 2025-05-26 1:42 UTC (permalink / raw)
To: Shuah Khan, Miklos Szeredi
Cc: zhanjun, niecheng1, wentao, Chen Linxuan, Amir Goldstein,
Shuah Khan, linux-kernel, linux-kselftest, linux-fsdevel
This patch add a simple functional test for the "abort" file
in fusectlfs (/sys/fs/fuse/connections/ID/about).
A simple fuse daemon is added for testing.
Related discussion can be found in the link below.
Link: https://lore.kernel.org/all/CAOQ4uxjKFXOKQxPpxtS6G_nR0tpw95w0GiO68UcWg_OBhmSY=Q@mail.gmail.com/
Cc: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Chen Linxuan <chenlinxuan@uniontech.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
---
Changes in v3:
- Apply changes suggested by Amir Goldstein
- Rename the test subdir to filesystems/fuse
- Verify errno when connection is aborted
- Apply changes suggested by Shuah Khan
- Update commit message
- Link to v2: https://lore.kernel.org/all/20250517012350.10317-2-chenlinxuan@uniontech.com/
Changes in v2:
- Apply changes suggested by Amir Goldstein
- Check errno
- Link to v1: https://lore.kernel.org/all/20250515073449.346774-2-chenlinxuan@uniontech.com/
---
MAINTAINERS | 1 +
tools/testing/selftests/Makefile | 1 +
.../selftests/filesystems/fuse/.gitignore | 3 +
.../selftests/filesystems/fuse/Makefile | 21 +++
.../selftests/filesystems/fuse/fuse_mnt.c | 146 ++++++++++++++++++
.../selftests/filesystems/fuse/fusectl_test.c | 116 ++++++++++++++
6 files changed, 288 insertions(+)
create mode 100644 tools/testing/selftests/filesystems/fuse/.gitignore
create mode 100644 tools/testing/selftests/filesystems/fuse/Makefile
create mode 100644 tools/testing/selftests/filesystems/fuse/fuse_mnt.c
create mode 100644 tools/testing/selftests/filesystems/fuse/fusectl_test.c
diff --git a/MAINTAINERS b/MAINTAINERS
index dd844ac8d9107..55bf95f06dbb6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9740,6 +9740,7 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git
F: Documentation/filesystems/fuse.rst
F: fs/fuse/
F: include/uapi/linux/fuse.h
+F: tools/testing/selftests/filesystems/fuse/
FUTEX SUBSYSTEM
M: Thomas Gleixner <tglx@linutronix.de>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 80fb84fa3cfcb..cadd4c217f3e0 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -36,6 +36,7 @@ TARGETS += filesystems/fat
TARGETS += filesystems/overlayfs
TARGETS += filesystems/statmount
TARGETS += filesystems/mount-notify
+TARGETS += filesystems/fuse
TARGETS += firmware
TARGETS += fpu
TARGETS += ftrace
diff --git a/tools/testing/selftests/filesystems/fuse/.gitignore b/tools/testing/selftests/filesystems/fuse/.gitignore
new file mode 100644
index 0000000000000..3e72e742d08e8
--- /dev/null
+++ b/tools/testing/selftests/filesystems/fuse/.gitignore
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+fuse_mnt
+fusectl_test
diff --git a/tools/testing/selftests/filesystems/fuse/Makefile b/tools/testing/selftests/filesystems/fuse/Makefile
new file mode 100644
index 0000000000000..612aad69a93aa
--- /dev/null
+++ b/tools/testing/selftests/filesystems/fuse/Makefile
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+CFLAGS += -Wall -O2 -g $(KHDR_INCLUDES)
+
+TEST_GEN_PROGS := fusectl_test
+TEST_GEN_FILES := fuse_mnt
+
+include ../../lib.mk
+
+VAR_CFLAGS := $(shell pkg-config fuse --cflags 2>/dev/null)
+ifeq ($(VAR_CFLAGS),)
+VAR_CFLAGS := -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse
+endif
+
+VAR_LDLIBS := $(shell pkg-config fuse --libs 2>/dev/null)
+ifeq ($(VAR_LDLIBS),)
+VAR_LDLIBS := -lfuse -pthread
+endif
+
+$(OUTPUT)/fuse_mnt: CFLAGS += $(VAR_CFLAGS)
+$(OUTPUT)/fuse_mnt: LDLIBS += $(VAR_LDLIBS)
diff --git a/tools/testing/selftests/filesystems/fuse/fuse_mnt.c b/tools/testing/selftests/filesystems/fuse/fuse_mnt.c
new file mode 100644
index 0000000000000..d12b17f30fadc
--- /dev/null
+++ b/tools/testing/selftests/filesystems/fuse/fuse_mnt.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fusectl test file-system
+ * Creates a simple FUSE filesystem with a single read-write file (/test)
+ */
+
+#define FUSE_USE_VERSION 26
+
+#include <fuse.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
+static char *content;
+static size_t content_size = 0;
+static const char test_path[] = "/test";
+
+static int test_getattr(const char *path, struct stat *st)
+{
+ memset(st, 0, sizeof(*st));
+
+ if (!strcmp(path, "/")) {
+ st->st_mode = S_IFDIR | 0755;
+ st->st_nlink = 2;
+ return 0;
+ }
+
+ if (!strcmp(path, test_path)) {
+ st->st_mode = S_IFREG | 0664;
+ st->st_nlink = 1;
+ st->st_size = content_size;
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+static int test_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
+ off_t offset, struct fuse_file_info *fi)
+{
+ if (strcmp(path, "/"))
+ return -ENOENT;
+
+ filler(buf, ".", NULL, 0);
+ filler(buf, "..", NULL, 0);
+ filler(buf, test_path + 1, NULL, 0);
+
+ return 0;
+}
+
+static int test_open(const char *path, struct fuse_file_info *fi)
+{
+ if (strcmp(path, test_path))
+ return -ENOENT;
+
+ return 0;
+}
+
+static int test_read(const char *path, char *buf, size_t size, off_t offset,
+ struct fuse_file_info *fi)
+{
+ if (strcmp(path, test_path) != 0)
+ return -ENOENT;
+
+ if (!content || content_size == 0)
+ return 0;
+
+ if (offset >= content_size)
+ return 0;
+
+ if (offset + size > content_size)
+ size = content_size - offset;
+
+ memcpy(buf, content + offset, size);
+
+ return size;
+}
+
+static int test_write(const char *path, const char *buf, size_t size,
+ off_t offset, struct fuse_file_info *fi)
+{
+ size_t new_size;
+
+ if (strcmp(path, test_path) != 0)
+ return -ENOENT;
+
+ if(offset > content_size)
+ return -EINVAL;
+
+ new_size = MAX(offset + size, content_size);
+
+ if (new_size > content_size)
+ content = realloc(content, new_size);
+
+ content_size = new_size;
+
+ if (!content)
+ return -ENOMEM;
+
+ memcpy(content + offset, buf, size);
+
+ return size;
+}
+
+static int test_truncate(const char *path, off_t size)
+{
+ if (strcmp(path, test_path) != 0)
+ return -ENOENT;
+
+ if (size == 0) {
+ free(content);
+ content = NULL;
+ content_size = 0;
+ return 0;
+ }
+
+ content = realloc(content, size);
+
+ if (!content)
+ return -ENOMEM;
+
+ if (size > content_size)
+ memset(content + content_size, 0, size - content_size);
+
+ content_size = size;
+ return 0;
+}
+
+static struct fuse_operations memfd_ops = {
+ .getattr = test_getattr,
+ .readdir = test_readdir,
+ .open = test_open,
+ .read = test_read,
+ .write = test_write,
+ .truncate = test_truncate,
+};
+
+int main(int argc, char *argv[])
+{
+ return fuse_main(argc, argv, &memfd_ops, NULL);
+}
diff --git a/tools/testing/selftests/filesystems/fuse/fusectl_test.c b/tools/testing/selftests/filesystems/fuse/fusectl_test.c
new file mode 100644
index 0000000000000..7050fbe0970e7
--- /dev/null
+++ b/tools/testing/selftests/filesystems/fuse/fusectl_test.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2025 Chen Linxuan <chenlinxuan@uniontech.com>
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <linux/limits.h>
+
+#include "../../kselftest_harness.h"
+
+#define FUSECTL_MOUNTPOINT "/sys/fs/fuse/connections"
+#define FUSE_MOUNTPOINT "/tmp/fuse_mnt_XXXXXX"
+#define FUSE_DEVICE "/dev/fuse"
+#define FUSECTL_TEST_VALUE "1"
+
+FIXTURE(fusectl){
+ char fuse_mountpoint[sizeof(FUSE_MOUNTPOINT)];
+ int connection;
+};
+
+FIXTURE_SETUP(fusectl)
+{
+ const char *fuse_mnt_prog = "./fuse_mnt";
+ int status, pid;
+ struct stat statbuf;
+
+ strcpy(self->fuse_mountpoint, FUSE_MOUNTPOINT);
+
+ if (!mkdtemp(self->fuse_mountpoint))
+ SKIP(return,
+ "Failed to create FUSE mountpoint %s",
+ strerror(errno));
+
+ if (access(FUSECTL_MOUNTPOINT, F_OK))
+ SKIP(return,
+ "FUSE control filesystem not mounted");
+
+ pid = fork();
+ if (pid < 0)
+ SKIP(return,
+ "Failed to fork FUSE daemon process: %s",
+ strerror(errno));
+
+ if (pid == 0) {
+ execlp(fuse_mnt_prog, fuse_mnt_prog, self->fuse_mountpoint, NULL);
+ exit(errno);
+ }
+
+ waitpid(pid, &status, 0);
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+ SKIP(return,
+ "Failed to start FUSE daemon %s",
+ strerror(WEXITSTATUS(status)));
+ }
+
+ if (stat(self->fuse_mountpoint, &statbuf))
+ SKIP(return,
+ "Failed to stat FUSE mountpoint %s",
+ strerror(errno));
+
+ self->connection = statbuf.st_dev;
+}
+
+FIXTURE_TEARDOWN(fusectl)
+{
+ umount(self->fuse_mountpoint);
+ rmdir(self->fuse_mountpoint);
+}
+
+TEST_F(fusectl, abort)
+{
+ char path_buf[PATH_MAX];
+ int abort_fd, test_fd, ret;
+
+ sprintf(path_buf, "/sys/fs/fuse/connections/%d/abort", self->connection);
+
+ ASSERT_EQ(0, access(path_buf, F_OK));
+
+ abort_fd = open(path_buf, O_WRONLY);
+ ASSERT_GE(abort_fd, 0);
+
+ sprintf(path_buf, "%s/test", self->fuse_mountpoint);
+
+ test_fd = open(path_buf, O_RDWR);
+ ASSERT_GE(test_fd, 0);
+
+ ret = read(test_fd, path_buf, sizeof(path_buf));
+ ASSERT_EQ(ret, 0);
+
+ ret = write(test_fd, "test", sizeof("test"));
+ ASSERT_EQ(ret, sizeof("test"));
+
+ ret = lseek(test_fd, 0, SEEK_SET);
+ ASSERT_GE(ret, 0);
+
+ ret = write(abort_fd, FUSECTL_TEST_VALUE, sizeof(FUSECTL_TEST_VALUE));
+ ASSERT_GT(ret, 0);
+
+ close(abort_fd);
+
+ ret = read(test_fd, path_buf, sizeof(path_buf));
+ ASSERT_EQ(ret, -1);
+ ASSERT_EQ(errno, ENOTCONN);
+}
+
+TEST_HARNESS_MAIN
--
2.43.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v3] selftests: filesystems: Add functional test for the abort file in fusectl
2025-05-26 1:42 [PATCH v3] selftests: filesystems: Add functional test for the abort file in fusectl Chen Linxuan
@ 2025-05-26 5:58 ` Amir Goldstein
0 siblings, 0 replies; 2+ messages in thread
From: Amir Goldstein @ 2025-05-26 5:58 UTC (permalink / raw)
To: Chen Linxuan
Cc: Shuah Khan, Miklos Szeredi, zhanjun, niecheng1, wentao,
Shuah Khan, linux-kernel, linux-kselftest, linux-fsdevel
On Mon, May 26, 2025 at 3:43 AM Chen Linxuan <chenlinxuan@uniontech.com> wrote:
>
> This patch add a simple functional test for the "abort" file
> in fusectlfs (/sys/fs/fuse/connections/ID/about).
>
> A simple fuse daemon is added for testing.
>
> Related discussion can be found in the link below.
>
> Link: https://lore.kernel.org/all/CAOQ4uxjKFXOKQxPpxtS6G_nR0tpw95w0GiO68UcWg_OBhmSY=Q@mail.gmail.com/
> Cc: Amir Goldstein <amir73il@gmail.com>
> Signed-off-by: Chen Linxuan <chenlinxuan@uniontech.com>
> Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
> ---
> Changes in v3:
> - Apply changes suggested by Amir Goldstein
> - Rename the test subdir to filesystems/fuse
> - Verify errno when connection is aborted
> - Apply changes suggested by Shuah Khan
> - Update commit message
> - Link to v2: https://lore.kernel.org/all/20250517012350.10317-2-chenlinxuan@uniontech.com/
> Changes in v2:
> - Apply changes suggested by Amir Goldstein
> - Check errno
> - Link to v1: https://lore.kernel.org/all/20250515073449.346774-2-chenlinxuan@uniontech.com/
> ---
> MAINTAINERS | 1 +
> tools/testing/selftests/Makefile | 1 +
> .../selftests/filesystems/fuse/.gitignore | 3 +
> .../selftests/filesystems/fuse/Makefile | 21 +++
> .../selftests/filesystems/fuse/fuse_mnt.c | 146 ++++++++++++++++++
> .../selftests/filesystems/fuse/fusectl_test.c | 116 ++++++++++++++
> 6 files changed, 288 insertions(+)
> create mode 100644 tools/testing/selftests/filesystems/fuse/.gitignore
> create mode 100644 tools/testing/selftests/filesystems/fuse/Makefile
> create mode 100644 tools/testing/selftests/filesystems/fuse/fuse_mnt.c
> create mode 100644 tools/testing/selftests/filesystems/fuse/fusectl_test.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index dd844ac8d9107..55bf95f06dbb6 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -9740,6 +9740,7 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git
> F: Documentation/filesystems/fuse.rst
> F: fs/fuse/
> F: include/uapi/linux/fuse.h
> +F: tools/testing/selftests/filesystems/fuse/
>
> FUTEX SUBSYSTEM
> M: Thomas Gleixner <tglx@linutronix.de>
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index 80fb84fa3cfcb..cadd4c217f3e0 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -36,6 +36,7 @@ TARGETS += filesystems/fat
> TARGETS += filesystems/overlayfs
> TARGETS += filesystems/statmount
> TARGETS += filesystems/mount-notify
> +TARGETS += filesystems/fuse
> TARGETS += firmware
> TARGETS += fpu
> TARGETS += ftrace
> diff --git a/tools/testing/selftests/filesystems/fuse/.gitignore b/tools/testing/selftests/filesystems/fuse/.gitignore
> new file mode 100644
> index 0000000000000..3e72e742d08e8
> --- /dev/null
> +++ b/tools/testing/selftests/filesystems/fuse/.gitignore
> @@ -0,0 +1,3 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +fuse_mnt
> +fusectl_test
> diff --git a/tools/testing/selftests/filesystems/fuse/Makefile b/tools/testing/selftests/filesystems/fuse/Makefile
> new file mode 100644
> index 0000000000000..612aad69a93aa
> --- /dev/null
> +++ b/tools/testing/selftests/filesystems/fuse/Makefile
> @@ -0,0 +1,21 @@
> +# SPDX-License-Identifier: GPL-2.0-or-later
> +
> +CFLAGS += -Wall -O2 -g $(KHDR_INCLUDES)
> +
> +TEST_GEN_PROGS := fusectl_test
> +TEST_GEN_FILES := fuse_mnt
> +
> +include ../../lib.mk
> +
> +VAR_CFLAGS := $(shell pkg-config fuse --cflags 2>/dev/null)
> +ifeq ($(VAR_CFLAGS),)
> +VAR_CFLAGS := -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse
> +endif
> +
> +VAR_LDLIBS := $(shell pkg-config fuse --libs 2>/dev/null)
> +ifeq ($(VAR_LDLIBS),)
> +VAR_LDLIBS := -lfuse -pthread
> +endif
> +
> +$(OUTPUT)/fuse_mnt: CFLAGS += $(VAR_CFLAGS)
> +$(OUTPUT)/fuse_mnt: LDLIBS += $(VAR_LDLIBS)
> diff --git a/tools/testing/selftests/filesystems/fuse/fuse_mnt.c b/tools/testing/selftests/filesystems/fuse/fuse_mnt.c
> new file mode 100644
> index 0000000000000..d12b17f30fadc
> --- /dev/null
> +++ b/tools/testing/selftests/filesystems/fuse/fuse_mnt.c
> @@ -0,0 +1,146 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * fusectl test file-system
> + * Creates a simple FUSE filesystem with a single read-write file (/test)
> + */
> +
> +#define FUSE_USE_VERSION 26
> +
> +#include <fuse.h>
> +#include <stdio.h>
> +#include <string.h>
> +#include <errno.h>
> +#include <fcntl.h>
> +#include <stdlib.h>
> +#include <unistd.h>
> +
> +#define MAX(a, b) ((a) > (b) ? (a) : (b))
> +
> +static char *content;
> +static size_t content_size = 0;
> +static const char test_path[] = "/test";
> +
> +static int test_getattr(const char *path, struct stat *st)
> +{
> + memset(st, 0, sizeof(*st));
> +
> + if (!strcmp(path, "/")) {
> + st->st_mode = S_IFDIR | 0755;
> + st->st_nlink = 2;
> + return 0;
> + }
> +
> + if (!strcmp(path, test_path)) {
> + st->st_mode = S_IFREG | 0664;
> + st->st_nlink = 1;
> + st->st_size = content_size;
> + return 0;
> + }
> +
> + return -ENOENT;
> +}
> +
> +static int test_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
> + off_t offset, struct fuse_file_info *fi)
> +{
> + if (strcmp(path, "/"))
> + return -ENOENT;
> +
> + filler(buf, ".", NULL, 0);
> + filler(buf, "..", NULL, 0);
> + filler(buf, test_path + 1, NULL, 0);
> +
> + return 0;
> +}
> +
> +static int test_open(const char *path, struct fuse_file_info *fi)
> +{
> + if (strcmp(path, test_path))
> + return -ENOENT;
> +
> + return 0;
> +}
> +
> +static int test_read(const char *path, char *buf, size_t size, off_t offset,
> + struct fuse_file_info *fi)
> +{
> + if (strcmp(path, test_path) != 0)
> + return -ENOENT;
> +
> + if (!content || content_size == 0)
> + return 0;
> +
> + if (offset >= content_size)
> + return 0;
> +
> + if (offset + size > content_size)
> + size = content_size - offset;
> +
> + memcpy(buf, content + offset, size);
> +
> + return size;
> +}
> +
> +static int test_write(const char *path, const char *buf, size_t size,
> + off_t offset, struct fuse_file_info *fi)
> +{
> + size_t new_size;
> +
> + if (strcmp(path, test_path) != 0)
> + return -ENOENT;
> +
> + if(offset > content_size)
> + return -EINVAL;
> +
> + new_size = MAX(offset + size, content_size);
> +
> + if (new_size > content_size)
> + content = realloc(content, new_size);
> +
> + content_size = new_size;
> +
> + if (!content)
> + return -ENOMEM;
> +
> + memcpy(content + offset, buf, size);
> +
> + return size;
> +}
> +
> +static int test_truncate(const char *path, off_t size)
> +{
> + if (strcmp(path, test_path) != 0)
> + return -ENOENT;
> +
> + if (size == 0) {
> + free(content);
> + content = NULL;
> + content_size = 0;
> + return 0;
> + }
> +
> + content = realloc(content, size);
> +
> + if (!content)
> + return -ENOMEM;
> +
> + if (size > content_size)
> + memset(content + content_size, 0, size - content_size);
> +
> + content_size = size;
> + return 0;
> +}
> +
> +static struct fuse_operations memfd_ops = {
> + .getattr = test_getattr,
> + .readdir = test_readdir,
> + .open = test_open,
> + .read = test_read,
> + .write = test_write,
> + .truncate = test_truncate,
> +};
> +
> +int main(int argc, char *argv[])
> +{
> + return fuse_main(argc, argv, &memfd_ops, NULL);
> +}
> diff --git a/tools/testing/selftests/filesystems/fuse/fusectl_test.c b/tools/testing/selftests/filesystems/fuse/fusectl_test.c
> new file mode 100644
> index 0000000000000..7050fbe0970e7
> --- /dev/null
> +++ b/tools/testing/selftests/filesystems/fuse/fusectl_test.c
> @@ -0,0 +1,116 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +// Copyright (c) 2025 Chen Linxuan <chenlinxuan@uniontech.com>
> +
> +#define _GNU_SOURCE
> +
> +#include <errno.h>
> +#include <fcntl.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <string.h>
> +#include <sys/mount.h>
> +#include <sys/stat.h>
> +#include <sys/types.h>
> +#include <sys/wait.h>
> +#include <unistd.h>
> +#include <dirent.h>
> +#include <linux/limits.h>
> +
> +#include "../../kselftest_harness.h"
> +
> +#define FUSECTL_MOUNTPOINT "/sys/fs/fuse/connections"
> +#define FUSE_MOUNTPOINT "/tmp/fuse_mnt_XXXXXX"
> +#define FUSE_DEVICE "/dev/fuse"
> +#define FUSECTL_TEST_VALUE "1"
> +
> +FIXTURE(fusectl){
> + char fuse_mountpoint[sizeof(FUSE_MOUNTPOINT)];
> + int connection;
> +};
> +
> +FIXTURE_SETUP(fusectl)
> +{
> + const char *fuse_mnt_prog = "./fuse_mnt";
> + int status, pid;
> + struct stat statbuf;
> +
> + strcpy(self->fuse_mountpoint, FUSE_MOUNTPOINT);
> +
> + if (!mkdtemp(self->fuse_mountpoint))
> + SKIP(return,
> + "Failed to create FUSE mountpoint %s",
> + strerror(errno));
> +
> + if (access(FUSECTL_MOUNTPOINT, F_OK))
> + SKIP(return,
> + "FUSE control filesystem not mounted");
> +
> + pid = fork();
> + if (pid < 0)
> + SKIP(return,
> + "Failed to fork FUSE daemon process: %s",
> + strerror(errno));
> +
> + if (pid == 0) {
> + execlp(fuse_mnt_prog, fuse_mnt_prog, self->fuse_mountpoint, NULL);
> + exit(errno);
> + }
> +
> + waitpid(pid, &status, 0);
> + if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
> + SKIP(return,
> + "Failed to start FUSE daemon %s",
> + strerror(WEXITSTATUS(status)));
> + }
> +
> + if (stat(self->fuse_mountpoint, &statbuf))
> + SKIP(return,
> + "Failed to stat FUSE mountpoint %s",
> + strerror(errno));
> +
> + self->connection = statbuf.st_dev;
> +}
> +
> +FIXTURE_TEARDOWN(fusectl)
> +{
> + umount(self->fuse_mountpoint);
> + rmdir(self->fuse_mountpoint);
> +}
> +
> +TEST_F(fusectl, abort)
> +{
> + char path_buf[PATH_MAX];
> + int abort_fd, test_fd, ret;
> +
> + sprintf(path_buf, "/sys/fs/fuse/connections/%d/abort", self->connection);
> +
> + ASSERT_EQ(0, access(path_buf, F_OK));
> +
> + abort_fd = open(path_buf, O_WRONLY);
> + ASSERT_GE(abort_fd, 0);
> +
> + sprintf(path_buf, "%s/test", self->fuse_mountpoint);
> +
> + test_fd = open(path_buf, O_RDWR);
> + ASSERT_GE(test_fd, 0);
> +
> + ret = read(test_fd, path_buf, sizeof(path_buf));
> + ASSERT_EQ(ret, 0);
> +
> + ret = write(test_fd, "test", sizeof("test"));
> + ASSERT_EQ(ret, sizeof("test"));
> +
> + ret = lseek(test_fd, 0, SEEK_SET);
> + ASSERT_GE(ret, 0);
> +
> + ret = write(abort_fd, FUSECTL_TEST_VALUE, sizeof(FUSECTL_TEST_VALUE));
> + ASSERT_GT(ret, 0);
> +
> + close(abort_fd);
> +
> + ret = read(test_fd, path_buf, sizeof(path_buf));
> + ASSERT_EQ(ret, -1);
> + ASSERT_EQ(errno, ENOTCONN);
> +}
> +
> +TEST_HARNESS_MAIN
> --
> 2.43.0
>
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2025-05-26 1:42 [PATCH v3] selftests: filesystems: Add functional test for the abort file in fusectl Chen Linxuan
2025-05-26 5:58 ` Amir Goldstein
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