[RFC PATCH v4 36/36] fuse: Provide easy way to test fuse struct_op call

Daniel Rosenberg
2024-03-29T01:55:20Z

This is useful for quickly testing a struct_op program.
I've been using this set up to test verifier changes.

I'll eventually move those sorts of tests to bpf selftests

Signed-off-by: Daniel Rosenberg <drosen@google.com>
---
fs/fuse/inode.c | 70 ++
.../selftests/filesystems/fuse/Makefile | 1 +
.../filesystems/fuse/struct_op_test.bpf.c | 642 ++++++++++++++++++
3 files changed, 713 insertions(+)
create mode 100644 tools/testing/selftests/filesystems/fuse/struct_op_test.bpf.c

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 67d70b3c4abb..cf9555e4be1f 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -2184,16 +2184,83 @@ static void fuse_fs_cleanup(void)

static struct kobject *fuse_kobj;

+static char struct_op_name[BPF_FUSE_NAME_MAX];
+static struct fuse_ops *fop = NULL;
+
+static ssize_t struct_op_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ size_t max = count;
+
+ if (max > BPF_FUSE_NAME_MAX) max = BPF_FUSE_NAME_MAX;
+ strncpy(struct_op_name, buf, max);
+ if (struct_op_name[max-1] == '\n')
+ struct_op_name[max-1] = 0;
+ put_fuse_ops(fop);
+ fop = find_fuse_ops(struct_op_name);
+ if (!fop)
+ printk("No struct op named %s found", struct_op_name);
+
+ return count;
+}
+
+static ssize_t struct_op_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct fuse_ops *op;
+ uint32_t result = 0;
+ struct bpf_fuse_meta_info meta;
+ struct fuse_mkdir_in in;
+ struct fuse_buffer name;
+ char name_buff[10] = "test";
+
+ name.data = &name_buff[0];
+ name.flags = BPF_FUSE_VARIABLE_SIZE;
+ name.max_size = 10;
+ name.size = 5;
+
+ op = fop;
+ if (!op) {
+ printk("Could not find fuse_op for %s", struct_op_name);
+ return 0;
+ }
+
+ if (op->mkdir_prefilter)
+ result = op->mkdir_prefilter(&meta, &in, &name);
+ else
+ printk("No func!!");
+
+ printk("in->mode:%d, name:%s result:%d", in.mode, (char *)name.data, result);
+ return sprintf(buf, "%d dyn:%s\n", result, (char *)name.data);
+}
+
+static struct kobj_attribute test_attr = __ATTR_RW(struct_op);
+
+static struct attribute *test_attrs[] = {
+ &test_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group test_attr_group = {
+ .attrs = test_attrs,
+};
+
static int fuse_sysfs_init(void)
{
int err;

+ memset(struct_op_name, 0, BPF_FUSE_NAME_MAX);
fuse_kobj = kobject_create_and_add("fuse", fs_kobj);
if (!fuse_kobj) {
err = -ENOMEM;
goto out_err;
}

+ err = sysfs_create_group(fuse_kobj, &test_attr_group);
+ if (err)
+ goto tmp;
+
err = sysfs_create_mount_point(fuse_kobj, "connections");
if (err)
goto out_fuse_unregister;
@@ -2202,6 +2269,8 @@ static int fuse_sysfs_init(void)

out_fuse_unregister:
kobject_put(fuse_kobj);
+tmp:
+ sysfs_remove_group(fuse_kobj, &test_attr_group);
out_err:
return err;
}
@@ -2209,6 +2278,7 @@ static int fuse_sysfs_init(void)
static void fuse_sysfs_cleanup(void)
{
sysfs_remove_mount_point(fuse_kobj, "connections");
+ sysfs_remove_group(fuse_kobj, &test_attr_group);
kobject_put(fuse_kobj);
}

diff --git a/tools/testing/selftests/filesystems/fuse/Makefile b/tools/testing/selftests/filesystems/fuse/Makefile
index b2df4dec0651..ff28859f3268 100644
--- a/tools/testing/selftests/filesystems/fuse/Makefile
+++ b/tools/testing/selftests/filesystems/fuse/Makefile
@@ -52,6 +52,7 @@ SELFTESTS:=$(TOOLSDIR)/testing/selftests/
LDLIBS := -lpthread -lelf -lz
TEST_GEN_PROGS := fuse_test fuse_daemon
TEST_GEN_FILES := \
+ struct_op_test.bpf.o \
test.skel.h \
fd.sh \

diff --git a/tools/testing/selftests/filesystems/fuse/struct_op_test.bpf.c b/tools/testing/selftests/filesystems/fuse/struct_op_test.bpf.c
new file mode 100644
index 000000000000..2cb178d2fa0c
--- /dev/null
+++ b/tools/testing/selftests/filesystems/fuse/struct_op_test.bpf.c
@@ -0,0 +1,642 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+// Copyright (c) 2021 Google LLC
+
+#include "vmlinux.h"
+//#include <uapi/linux/bpf.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+//#include <linux/fuse.h>
+#include <bpf/bpf_tracing.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_common.h"
+
+char _license[] SEC("license") = "GPL";
+
+#define BPF_STRUCT_OPS(type, name, args...) \
+SEC("struct_ops/"#name) \
+type BPF_PROG(name, ##args)
+
+/*
+struct test_struct {
+ uint32_t a;
+ uint32_t b;
+};
+
+
+*/
+//struct fuse_buffer;
+#define BPF_FUSE_CONTINUE 0
+/*struct fuse_ops {
+ uint32_t (*test_func)(void);
+ uint32_t (*test_func2)(struct test_struct *a);
+ uint32_t (*test_func3)(struct fuse_name *ptr);
+ //u32 (*open_prefilter)(struct bpf_fuse_hidden_info meh, struct bpf_fuse_meta_info header, struct fuse_open_in foi);
+ //u32 (*open_postfilter)(struct bpf_fuse_hidden_info meh, struct bpf_fuse_meta_info header, const struct fuse_open_in foi, struct fuse_open_out foo);
+ char name[BPF_FUSE_NAME_MAX];
+};
+*/
+extern uint32_t bpf_fuse_return_len(struct fuse_buffer *ptr) __ksym;
+extern void bpf_fuse_get_rw_dynptr(struct fuse_buffer *buffer, struct bpf_dynptr *dynptr, u64 size, bool copy) __ksym;
+extern void bpf_fuse_get_ro_dynptr(const struct fuse_buffer *buffer, struct bpf_dynptr *dynptr) __ksym;
+
+//extern struct bpf_key *bpf_lookup_user_key(__u32 serial, __u64 flags) __ksym;
+//extern struct bpf_key *bpf_lookup_system_key(__u64 id) __ksym;
+//extern void bpf_key_put(struct bpf_key *key) __ksym;
+//extern int bpf_verify_pkcs7_signature(struct bpf_dynptr *data_ptr,
+// struct bpf_dynptr *sig_ptr,
+// struct bpf_key *trusted_keyring) __ksym;
+
+BPF_STRUCT_OPS(uint32_t, test_func, const struct bpf_fuse_meta_info *meta,
+ struct fuse_mkdir_in *in, struct fuse_buffer *name)
+{
+ int res = 0;
+ struct bpf_dynptr name_ptr;
+ char *name_buf;
+ //char dummy[7] = {};
+
+ bpf_fuse_get_ro_dynptr(name, &name_ptr);
+ name_buf = bpf_dynptr_slice(&name_ptr, 0, NULL, 4);
+ bpf_printk("Hello test print");
+ if (!name_buf)
+ return -ENOMEM;
+ if (!bpf_strncmp(name_buf, 4, "test"))
+ return 42;
+
+ //if (bpf_fuse_namecmp(name, "test", 4) == 0)
+ // return 42;
+
+ return res;
+}
+
+SEC(".struct_ops")
+struct fuse_ops test_ops = {
+ .mkdir_prefilter = (void *)test_func,
+ .name = "test",
+};
+
+BPF_STRUCT_OPS(uint32_t, open_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_open_in *in)
+{
+ bpf_printk("open_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, open_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_open_in *in,
+ struct fuse_open_out *out)
+{
+ bpf_printk("open_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, opendir_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_open_in *in)
+{
+ bpf_printk("opendir_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, opendir_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_open_in *in,
+ struct fuse_open_out *out)
+{
+ bpf_printk("opendir_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, create_open_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_create_in *in, struct fuse_buffer *name)
+{
+ bpf_printk("create_open_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, create_open_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_create_in *in, const struct fuse_buffer *name,
+ struct fuse_entry_out *entry_out, struct fuse_open_out *out)
+{
+ bpf_printk("create_open_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, release_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_release_in *in)
+{
+ bpf_printk("release_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, release_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_release_in *in)
+{
+ bpf_printk("release_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, releasedir_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_release_in *in)
+{
+ bpf_printk("releasedir_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, releasedir_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_release_in *in)
+{
+ bpf_printk("releasedir_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, flush_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_flush_in *in)
+{
+ bpf_printk("flush_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, flush_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_flush_in *in)
+{
+ bpf_printk("flush_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, lseek_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_lseek_in *in)
+{
+ bpf_printk("lseek_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, lseek_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_lseek_in *in,
+ struct fuse_lseek_out *out)
+{
+ bpf_printk("lseek_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, copy_file_range_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_copy_file_range_in *in)
+{
+ bpf_printk("copy_file_range_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, copy_file_range_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_copy_file_range_in *in,
+ struct fuse_write_out *out)
+{
+ bpf_printk("copy_file_range_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, fsync_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_fsync_in *in)
+{
+ bpf_printk("fsync_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, fsync_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_fsync_in *in)
+{
+ bpf_printk("fsync_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, dir_fsync_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_fsync_in *in)
+{
+ bpf_printk("dir_fsync_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, dir_fsync_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_fsync_in *in)
+{
+ bpf_printk("dir_fsync_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, getxattr_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_getxattr_in *in, struct fuse_buffer *name)
+{
+ bpf_printk("getxattr_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, getxattr_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_getxattr_in *in, const struct fuse_buffer *name,
+ struct fuse_buffer *value, struct fuse_getxattr_out *out)
+{
+ bpf_printk("getxattr_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, listxattr_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_getxattr_in *in)
+{
+ bpf_printk("listxattr_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, listxattr_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_getxattr_in *in,
+ struct fuse_buffer *value, struct fuse_getxattr_out *out)
+{
+ bpf_printk("listxattr_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, setxattr_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_setxattr_in *in, struct fuse_buffer *name,
+ struct fuse_buffer *value)
+{
+ bpf_printk("setxattr_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, setxattr_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_setxattr_in *in, const struct fuse_buffer *name,
+ const struct fuse_buffer *value)
+{
+ bpf_printk("setxattr_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, removexattr_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_buffer *name)
+{
+ bpf_printk("removexattr_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, removexattr_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_buffer *name)
+{
+ bpf_printk("removexattr_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, read_iter_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_read_in *in)
+{
+ bpf_printk("read_iter_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, read_iter_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_read_in *in,
+ struct fuse_read_iter_out *out)
+{
+ bpf_printk("read_iter_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, write_iter_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_write_in *in)
+{
+ bpf_printk("write_iter_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, write_iter_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_write_in *in,
+ struct fuse_write_iter_out *out)
+{
+ bpf_printk("write_iter_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, file_fallocate_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_fallocate_in *in)
+{
+ bpf_printk("file_fallocate_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, file_fallocate_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_fallocate_in *in)
+{
+ bpf_printk("file_fallocate_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, lookup_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_buffer *name)
+{
+ bpf_printk("lookup_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, lookup_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_buffer *name,
+ struct fuse_entry_out *out, struct fuse_buffer *entries)
+{
+ bpf_printk("lookup_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, mknod_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_mknod_in *in, struct fuse_buffer *name)
+{
+ bpf_printk("mknod_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, mknod_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_mknod_in *in, const struct fuse_buffer *name)
+{
+ bpf_printk("mknod_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, mkdir_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_mkdir_in *in, struct fuse_buffer *name)
+{
+ bpf_printk("mkdir_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, mkdir_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_mkdir_in *in, const struct fuse_buffer *name)
+{
+ bpf_printk("mkdir_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, rmdir_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_buffer *name)
+{
+ bpf_printk("rmdir_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, rmdir_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_buffer *name)
+{
+ bpf_printk("rmdir_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, rename2_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_rename2_in *in, struct fuse_buffer *old_name,
+ struct fuse_buffer *new_name)
+{
+ bpf_printk("rename2_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, rename2_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_rename2_in *in, const struct fuse_buffer *old_name,
+ const struct fuse_buffer *new_name)
+{
+ bpf_printk("rename2_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, rename_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_rename_in *in, struct fuse_buffer *old_name,
+ struct fuse_buffer *new_name)
+{
+ bpf_printk("rename_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, rename_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_rename_in *in, const struct fuse_buffer *old_name,
+ const struct fuse_buffer *new_name)
+{
+ bpf_printk("rename_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, unlink_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_buffer *name)
+{
+ bpf_printk("unlink_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, unlink_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_buffer *name)
+{
+ bpf_printk("unlink_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, link_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_link_in *in, struct fuse_buffer *name)
+{
+ bpf_printk("link_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, link_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_link_in *in, const struct fuse_buffer *name)
+{
+ bpf_printk("link_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, getattr_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_getattr_in *in)
+{
+ bpf_printk("getattr_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, getattr_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_getattr_in *in,
+ struct fuse_attr_out *out)
+{
+ bpf_printk("getattr_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, setattr_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_setattr_in *in)
+{
+ bpf_printk("setattr_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, setattr_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_setattr_in *in,
+ struct fuse_attr_out *out)
+{
+ bpf_printk("setattr_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, statfs_prefilter, const struct bpf_fuse_meta_info *meta)
+{
+ bpf_printk("statfs_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, statfs_postfilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_statfs_out *out)
+{
+ bpf_printk("statfs_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, get_link_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_buffer *name)
+{
+ bpf_printk("get_link_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, get_link_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_buffer *name)
+{
+ bpf_printk("get_link_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, symlink_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_buffer *name, struct fuse_buffer *path)
+{
+ bpf_printk("symlink_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, symlink_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_buffer *name, const struct fuse_buffer *path)
+{
+ bpf_printk("symlink_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, readdir_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_read_in *in)
+{
+ bpf_printk("readdir_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, readdir_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_read_in *in,
+ struct fuse_read_out *out, struct fuse_buffer *buffer)
+{
+ bpf_printk("readdir_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, access_prefilter, const struct bpf_fuse_meta_info *meta,
+ struct fuse_access_in *in)
+{
+ bpf_printk("access_prefilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+BPF_STRUCT_OPS(uint32_t, access_postfilter, const struct bpf_fuse_meta_info *meta,
+ const struct fuse_access_in *in)
+{
+ bpf_printk("access_postfilter");
+ return BPF_FUSE_CONTINUE;
+}
+
+SEC(".struct_ops")
+struct fuse_ops trace_ops = {
+ .open_prefilter = (void *)open_prefilter,
+ .open_postfilter = (void *)open_postfilter,
+
+ .opendir_prefilter = (void *)opendir_prefilter,
+ .opendir_postfilter = (void *)opendir_postfilter,
+
+ .create_open_prefilter = (void *)create_open_prefilter,
+ .create_open_postfilter = (void *)create_open_postfilter,
+
+ .release_prefilter = (void *)release_prefilter,
+ .release_postfilter = (void *)release_postfilter,
+
+ .releasedir_prefilter = (void *)releasedir_prefilter,
+ .releasedir_postfilter = (void *)releasedir_postfilter,
+
+ .flush_prefilter = (void *)flush_prefilter,
+ .flush_postfilter = (void *)flush_postfilter,
+
+ .lseek_prefilter = (void *)lseek_prefilter,
+ .lseek_postfilter = (void *)lseek_postfilter,
+
+ .copy_file_range_prefilter = (void *)copy_file_range_prefilter,
+ .copy_file_range_postfilter = (void *)copy_file_range_postfilter,
+
+ .fsync_prefilter = (void *)fsync_prefilter,
+ .fsync_postfilter = (void *)fsync_postfilter,
+
+ .dir_fsync_prefilter = (void *)dir_fsync_prefilter,
+ .dir_fsync_postfilter = (void *)dir_fsync_postfilter,
+
+ .getxattr_prefilter = (void *)getxattr_prefilter,
+ .getxattr_postfilter = (void *)getxattr_postfilter,
+
+ .listxattr_prefilter = (void *)listxattr_prefilter,
+ .listxattr_postfilter = (void *)listxattr_postfilter,
+
+ .setxattr_prefilter = (void *)setxattr_prefilter,
+ .setxattr_postfilter = (void *)setxattr_postfilter,
+
+ .removexattr_prefilter = (void *)removexattr_prefilter,
+ .removexattr_postfilter = (void *)removexattr_postfilter,
+
+ .read_iter_prefilter = (void *)read_iter_prefilter,
+ .read_iter_postfilter = (void *)read_iter_postfilter,
+
+ .write_iter_prefilter = (void *)write_iter_prefilter,
+ .write_iter_postfilter = (void *)write_iter_postfilter,
+
+ .file_fallocate_prefilter = (void *)file_fallocate_prefilter,
+ .file_fallocate_postfilter = (void *)file_fallocate_postfilter,
+
+ .lookup_prefilter = (void *)lookup_prefilter,
+ .lookup_postfilter = (void *)lookup_postfilter,
+
+ .mknod_prefilter = (void *)mknod_prefilter,
+ .mknod_postfilter = (void *)mknod_postfilter,
+
+ .mkdir_prefilter = (void *)mkdir_prefilter,
+ .mkdir_postfilter = (void *)mkdir_postfilter,
+
+ .rmdir_prefilter = (void *)rmdir_prefilter,
+ .rmdir_postfilter = (void *)rmdir_postfilter,
+
+ .rename2_prefilter = (void *)rename2_prefilter,
+ .rename2_postfilter = (void *)rename2_postfilter,
+
+ .rename_prefilter = (void *)rename_prefilter,
+ .rename_postfilter = (void *)rename_postfilter,
+
+ .unlink_prefilter = (void *)unlink_prefilter,
+ .unlink_postfilter = (void *)unlink_postfilter,
+
+ .link_prefilter = (void *)link_prefilter,
+ .link_postfilter = (void *)link_postfilter,
+
+ .getattr_prefilter = (void *)getattr_prefilter,
+ .getattr_postfilter = (void *)getattr_postfilter,
+
+ .setattr_prefilter = (void *)setattr_prefilter,
+ .setattr_postfilter = (void *)setattr_postfilter,
+
+ .statfs_prefilter = (void *)statfs_prefilter,
+ .statfs_postfilter = (void *)statfs_postfilter,
+
+ .get_link_prefilter = (void *)get_link_prefilter,
+ .get_link_postfilter = (void *)get_link_postfilter,
+
+ .symlink_prefilter = (void *)symlink_prefilter,
+ .symlink_postfilter = (void *)symlink_postfilter,
+
+ .readdir_prefilter = (void *)readdir_prefilter,
+ .readdir_postfilter = (void *)readdir_postfilter,
+
+ .access_prefilter = (void *)access_prefilter,
+ .access_postfilter = (void *)access_postfilter,
+
+ .name = "trace_pre_ops",
+};
--
2.44.0.478.gd926399ef9-goog