diff --git a/.vscode/settings.json b/.vscode/settings.json
index 25765870a..bb2cddaa2 100755
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -195,10 +195,14 @@
         "socket.h": "c",
         "net_svr.h": "c",
         "inet.h": "c",
-        "u_malloc.h": "c"
+        "u_malloc.h": "c",
+        "nsfs.h": "c"
     },
     "cortex-debug.showRTOS": false,
     "cortex-debug.variableUseNaturalFormat": true,
     "C_Cpp.default.systemIncludePath": [""],
-    "C_Cpp.default.forcedInclude": ["${workspaceFolder}/build/autoconf.h"]
+    "C_Cpp.default.forcedInclude": [
+        "${workspaceFolder}/build/autoconf.h"
+    ],
+    "C_Cpp.errorSquiggles": "disabled"
 }
\ No newline at end of file
diff --git a/mkrtos_knl/drivers/stm32f2/systick/systick.c b/mkrtos_knl/drivers/stm32f2/systick/systick.c
index 5967ee21c..b32db77ec 100755
--- a/mkrtos_knl/drivers/stm32f2/systick/systick.c
+++ b/mkrtos_knl/drivers/stm32f2/systick/systick.c
@@ -15,7 +15,10 @@ umword_t sys_tick_cnt_get(void)
 void SysTick_Handler(void)
 {
     // 进行上下文切换
-    thread_sched(TRUE);
+    if (!thread_sched(TRUE))
+    {
+        atomic_inc(&thread_get_current()->time_count);
+    }
     sys_tick_cnt++;
 #if 0
     thread_timeout_check(1);
diff --git a/mkrtos_user/lib/letter-shell/demo/mkrtos/shell_fs_ext.c b/mkrtos_user/lib/letter-shell/demo/mkrtos/shell_fs_ext.c
index a59a0b682..56f952798 100644
--- a/mkrtos_user/lib/letter-shell/demo/mkrtos/shell_fs_ext.c
+++ b/mkrtos_user/lib/letter-shell/demo/mkrtos/shell_fs_ext.c
@@ -13,28 +13,55 @@
 #include <errno.h>
 #include "u_sys.h"
 #include "unistd.h"
+#include "u_malloc.h"
 int ls(int argc, char *agrv[])
 {
     DIR *dir;
     struct dirent *ptr;
     int i;
+    char *path;
+    char *in_path;
+    int ret;
+
     if (argc < 2)
     {
-        return -1;
+        in_path = ".";
+    }
+    else
+    {
+        in_path = agrv[1];
     }
 
-    dir = opendir(agrv[1]);
+    path = u_malloc(PAGE_SIZE);
+    if (path == NULL)
+    {
+        return -ENOMEM;
+    }
+    strcpy(path, in_path);
+    dir = opendir(in_path);
     if (!dir)
     {
+        u_free(path);
         return 0;
     }
     while ((ptr = readdir(dir)) != NULL)
     {
         struct stat st = {0};
-        stat(ptr->d_name, &st);
-        printf("%s\t\t\t%dB\n", ptr->d_name, st.st_size);
+        strcat(path, "/");
+        strcat(path, ptr->d_name);
+        ret = stat(path, &st);
+        // if (ret >= 0)
+        // {
+        printf("%s\t\t\t%dB\n", path, st.st_size);
+        // }
+        // else
+        // {
+        //     printf("error:%d\n", ret);
+        // }
+        strcpy(path, in_path);
     }
     closedir(dir);
+    u_free(path);
     return 0;
 }
 SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN), ls, ls, ls command);
@@ -51,6 +78,18 @@ int rm(int argc, char *agrv[])
     return ret;
 }
 SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN), rm, rm, rm command);
+int cd(int argc, char *agrv[])
+{
+    int ret;
+    if (argc < 2)
+    {
+        return -1;
+    }
+
+    ret = chdir(agrv[1]);
+    return ret;
+}
+SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN), cd, cd, cd command);
 int cat(int argc, char *argv[])
 {
     if (argc != 2)
diff --git a/mkrtos_user/lib/libc_backend/inc/syscall_backend.h b/mkrtos_user/lib/libc_backend/inc/syscall_backend.h
index 553bbcef3..8f9f9ea18 100644
--- a/mkrtos_user/lib/libc_backend/inc/syscall_backend.h
+++ b/mkrtos_user/lib/libc_backend/inc/syscall_backend.h
@@ -103,7 +103,8 @@ umword_t be_mmap(void *start,
                  long flags,
                  long fd,
                  long _offset);
-int be_fcntl(int fd, int cmd, void* arg);
+int be_fcntl(int fd, int cmd, void *arg);
+long be_chdir(const char *path);
 int be_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
 // net api
 int be_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
diff --git a/mkrtos_user/lib/libc_backend/src/fs_backend.c b/mkrtos_user/lib/libc_backend/src/fs_backend.c
index dbc326538..c3660527a 100644
--- a/mkrtos_user/lib/libc_backend/src/fs_backend.c
+++ b/mkrtos_user/lib/libc_backend/src/fs_backend.c
@@ -20,6 +20,8 @@
 #include <u_task.h>
 #include <u_util.h>
 #include <poll.h>
+#include <u_path.h>
+#include "kstat.h"
 AUTO_CALL(101)
 void fs_backend_init(void)
 {
@@ -27,14 +29,20 @@ void fs_backend_init(void)
     assert(fd_map_alloc(0, 1, FD_TTY) >= 0);
     assert(fd_map_alloc(0, 2, FD_TTY) >= 0);
 }
+#define FS_PATH_LEN 64
+static char cur_path[FS_PATH_LEN] = "/";
 int be_open(const char *path, int flags, mode_t mode)
 {
+    int fd;
+
     if (path == NULL)
     {
         return -ENOENT;
     }
-    int fd = fs_open(path, flags, mode);
+    char new_path[FS_PATH_LEN]; // FIXME:动态申请
+    u_rel_path_to_abs(cur_path, path, new_path);
 
+    fd = fs_open(new_path, flags, mode);
     if (fd < 0)
     {
         return fd;
@@ -129,7 +137,7 @@ static int be_tty_read(char *buf, long size)
         }
         else if (len == 0)
         {
-            u_sema_down(SEMA_PROT, 0/*TODO:*/, NULL);
+            u_sema_down(SEMA_PROT, 0 /*TODO:*/, NULL);
             continue;
         }
         r_len += len;
@@ -411,11 +419,17 @@ long sys_be_lseek(va_list ap)
 }
 long be_mkdir(const char *path, mode_t mode)
 {
-    return fs_mkdir((char *)path);
+    char new_path[FS_PATH_LEN]; // FIXME:动态申请
+    u_rel_path_to_abs(cur_path, path, new_path);
+    return fs_mkdir((char *)new_path);
 }
 long be_symlink(const char *src, const char *dst)
 {
-    return fs_symlink(src, dst);
+    char new_src_path[FS_PATH_LEN]; // FIXME:动态申请
+    char new_dst_path[FS_PATH_LEN]; // FIXME:动态申请
+    u_rel_path_to_abs(cur_path, src, new_src_path);
+    u_rel_path_to_abs(cur_path, dst, new_dst_path);
+    return fs_symlink(new_src_path, new_dst_path);
 }
 long be_getdents(long fd, char *buf, size_t size)
 {
@@ -448,7 +462,9 @@ long be_getdents(long fd, char *buf, size_t size)
 long be_stat(const char *path, void *_buf)
 {
     struct kstat *buf = _buf;
-    return fs_stat((char *)path, buf);
+    char new_src_path[FS_PATH_LEN]; // FIXME:动态申请
+    u_rel_path_to_abs(cur_path, path, new_src_path);
+    return fs_stat((char *)new_src_path, buf);
 }
 long be_fstat(int fd, void *_buf)
 {
@@ -464,7 +480,9 @@ long be_fstat(int fd, void *_buf)
 }
 long be_unlink(const char *path)
 {
-    return fs_unlink(path);
+    char new_src_path[FS_PATH_LEN]; // FIXME:动态申请
+    u_rel_path_to_abs(cur_path, path, new_src_path);
+    return fs_unlink(new_src_path);
 }
 long be_poll(struct pollfd *fds, nfds_t n, int timeout)
 {
@@ -547,5 +565,27 @@ int be_fcntl(int fd, int cmd, void *arg)
 }
 int be_access(const char *filename, int amode)
 {
+    // char new_src_path[FS_PATH_LEN]; // FIXME:动态申请
+    // u_rel_path_to_abs(cur_path, path, new_src_path);
     return -ENOSYS;
 }
+long be_chdir(const char *path)
+{
+    int ret;
+    struct kstat buf;
+    char new_src_path[FS_PATH_LEN]; // FIXME:动态申请
+    u_rel_path_to_abs(cur_path, path, new_src_path);
+
+    ret = fs_stat((char *)new_src_path, &buf);
+    if (ret < 0)
+    {
+        return ret;
+    }
+    if (!S_ISDIR(buf.st_mode))
+    {
+        return -ENOTDIR;
+    }
+    strncpy(cur_path, new_src_path, FS_PATH_LEN);
+    cur_path[FS_PATH_LEN - 1] = '\0';
+    return ret;
+}
diff --git a/mkrtos_user/lib/mlibc/arch/arm/kstat.h b/mkrtos_user/lib/mlibc/arch/arm/kstat.h
index f04c78f9f..b955c735f 100644
--- a/mkrtos_user/lib/mlibc/arch/arm/kstat.h
+++ b/mkrtos_user/lib/mlibc/arch/arm/kstat.h
@@ -1,3 +1,4 @@
+#pragma once
 struct kstat {
 	long st_dev;
 	int __st_dev_padding;
@@ -18,4 +19,4 @@ struct kstat {
 	long st_ctime_sec;
 	long st_ctime_nsec;
 	long st_ino;
-};
\ No newline at end of file
+};
diff --git a/mkrtos_user/lib/mlibc/src/stat/fstatat.c b/mkrtos_user/lib/mlibc/src/stat/fstatat.c
index 55c4f6bb4..f32d14993 100644
--- a/mkrtos_user/lib/mlibc/src/stat/fstatat.c
+++ b/mkrtos_user/lib/mlibc/src/stat/fstatat.c
@@ -117,12 +117,16 @@ static int fstatat_kstat(int fd, const char *restrict path, struct stat *restric
 	if (ret) return ret;
 
 	*st = (struct stat){
+		#ifndef MKRTOS
 		.st_dev = kst.st_dev,
+		#endif
 		.st_ino = kst.st_ino,
 		.st_mode = kst.st_mode,
 		.st_nlink = kst.st_nlink,
+		#ifndef MKRTOS
 		.st_uid = kst.st_uid,
 		.st_gid = kst.st_gid,
+		#endif
 		.st_rdev = kst.st_rdev,
 		.st_size = kst.st_size,
 		.st_blksize = kst.st_blksize,
diff --git a/mkrtos_user/lib/mlibc/src/unistd/chdir.c b/mkrtos_user/lib/mlibc/src/unistd/chdir.c
index 5ba78b631..2659cae2e 100644
--- a/mkrtos_user/lib/mlibc/src/unistd/chdir.c
+++ b/mkrtos_user/lib/mlibc/src/unistd/chdir.c
@@ -1,7 +1,14 @@
 #include <unistd.h>
 #include "syscall.h"
 
+#ifndef NO_LITTLE_MODE
+#include "syscall_backend.h"
+#endif
 int chdir(const char *path)
 {
+#ifdef NO_LITTLE_MODE
 	return syscall(SYS_chdir, path);
+#else
+	return be_chdir(path);
+#endif
 }
diff --git a/mkrtos_user/lib/sys_svr/inc/ns_cli.h b/mkrtos_user/lib/sys_svr/inc/ns_cli.h
index 0b57365d4..8663547ea 100644
--- a/mkrtos_user/lib/sys_svr/inc/ns_cli.h
+++ b/mkrtos_user/lib/sys_svr/inc/ns_cli.h
@@ -3,5 +3,5 @@
 #include "u_types.h"
 #include "ns_types.h"
 
-int ns_register(const char *path, obj_handler_t svr_hd, enum node_type type);
+int ns_register(const char *path, obj_handler_t svr_hd, int flags);
 int ns_query(const char *path, obj_handler_t *svr_hd, int flags);
diff --git a/mkrtos_user/lib/sys_svr/inc/ns_types.h b/mkrtos_user/lib/sys_svr/inc/ns_types.h
index 77a70d189..9fa70a852 100644
--- a/mkrtos_user/lib/sys_svr/inc/ns_types.h
+++ b/mkrtos_user/lib/sys_svr/inc/ns_types.h
@@ -2,35 +2,29 @@
 #include "u_types.h"
 #include "u_rpc_svr.h"
 #include "u_slist.h"
-#define NAMESPACE_PATH_LEN 32
-#define NAMESAPCE_NR 8
 
-enum node_type
+#define NS_NODE_NAME_LEN 32
+
+typedef enum node_type
 {
-    MOUNT_NODE, //!< 挂载节点
-    FILE_NODE,  //!< 文件节点
-    DIR_NODE,   //!< 存在子目录
-    SYM_NODE,   //!< 一个软链接节点
-};
+    NODE_TYPE_DUMMY, //!< 虚拟节点，可以有子节点
+    NODE_TYPE_SVR,   //!< 服务节点，不能有子节点
+    NODE_TYPE_ROOT,  //!< ROOT节点
+} node_type_t;
+
 typedef struct ns_node
 {
-    struct ns_node *parent;             //!< 父节点
-    char node_name[NAMESPACE_PATH_LEN]; //!< 节点的类型
-    enum node_type type;                //!< 节点的类型
-    union
-    {
-        struct
-        {
-            obj_handler_t node_hd;         //!< 存储设备ipc的hd号码
-            pid_t pid;                     //!< 哪一个task注册的？
-        };                                 //!< FILE_NODE &MOUNT_NODE使用该结构
-        slist_head_t sub_dir;              //!< 只有DIR_NODE才有子目录
-        char sym_path[NAMESPACE_PATH_LEN]; //!< SYM_NODE的软链接路径
-    };
-    slist_head_t node; //!< 当前节点作为子节点使用
-    int ref;           //!< 引用计数
+    char name[NS_NODE_NAME_LEN]; //!< 节点名字
+    node_type_t type;            //!< 节点类型
+    struct ns_node *parent;      //!< 父节点
+    struct ns_node *next;        //!< 下一个
+    // union
+    // {
+        struct ns_node *sub;  //!< 子树
+        obj_handler_t svr_hd; //!< 服务节点
+    // };
+    int ref; //!< 引用计数
 } ns_node_t;
-
 typedef struct ns
 {
     rpc_svr_obj_t svr;
diff --git a/mkrtos_user/lib/sys_svr/src/fs_cli.c b/mkrtos_user/lib/sys_svr/src/fs_cli.c
index ef2e93f24..a7316a0d3 100644
--- a/mkrtos_user/lib/sys_svr/src/fs_cli.c
+++ b/mkrtos_user/lib/sys_svr/src/fs_cli.c
@@ -28,11 +28,7 @@ sd_t fs_open(const char *path, int flags, int mode)
 
     if (ret < 0)
     {
-        ret = ns_query(path, &hd, 0x0);
-        if (ret < 0)
-        {
-            return ret;
-        }
+        return ret;
     }
 
     rpc_ref_file_array_t rpc_path = {
diff --git a/mkrtos_user/lib/sys_svr/src/ns_cli.c b/mkrtos_user/lib/sys_svr/src/ns_cli.c
index 0afd0e50b..42afbd873 100644
--- a/mkrtos_user/lib/sys_svr/src/ns_cli.c
+++ b/mkrtos_user/lib/sys_svr/src/ns_cli.c
@@ -5,6 +5,7 @@
 #include "u_env.h"
 #include "u_prot.h"
 #include "u_hd_man.h"
+#include "u_path.h"
 #include <stdio.h>
 #include <string.h>
 #include <assert.h>
@@ -12,7 +13,7 @@
 #define NS_CLI_CACHE_NR 8 //!< 一个客户端最多可以请求8个服务
 typedef struct ns_cli_entry
 {
-    char path[NAMESPACE_PATH_LEN];
+    char path[NS_NODE_NAME_LEN];
     obj_handler_t hd;
 } ns_cli_entry_t;
 
@@ -77,7 +78,7 @@ RPC_GENERATION_CALL2(ns_t, NS_PROT, NS_QUERY_OP, query,
                      rpc_ref_array_uint32_t_uint8_t_32_t, rpc_array_uint32_t_uint8_t_32_t, RPC_DIR_IN, RPC_TYPE_DATA, path,
                      rpc_obj_handler_t_t, rpc_obj_handler_t_t, RPC_DIR_INOUT, RPC_TYPE_BUF, cli_hd)
 
-int ns_register(const char *path, obj_handler_t svr_hd, enum node_type type)
+int ns_register(const char *path, obj_handler_t svr_hd, int flags)
 {
     assert(path);
 
@@ -89,7 +90,7 @@ int ns_register(const char *path, obj_handler_t svr_hd, enum node_type type)
         .data = svr_hd,
     };
     rpc_int_t rpc_type = {
-        .data = type,
+        .data = flags,
     };
 
     msg_tag_t tag = ns_t_register_call(u_get_global_env()->ns_hd, &rpc_path, &rpc_svr_hd, &rpc_type);
@@ -102,6 +103,12 @@ int ns_query(const char *path, obj_handler_t *svr_hd, int flags)
     assert(path);
     assert(svr_hd);
 
+    if (u_is_root_path(path))
+    {
+        // 根路径直接返回服务路径就行了
+        *svr_hd = u_get_global_env()->ns_hd;
+        return 0;
+    }
     obj_handler_t newfd;
 
     newfd = find_hd(path, &inx);
@@ -134,6 +141,7 @@ int ns_query(const char *path, obj_handler_t *svr_hd, int flags)
         handler_free(newfd);
         return msg_tag_get_val(tag);
     }
+#if 0
     if (flags & 0x1)
     {
         if (msg_tag_get_val(tag) != strlen(path))
@@ -143,6 +151,7 @@ int ns_query(const char *path, obj_handler_t *svr_hd, int flags)
             return -ENOENT;
         }
     }
+#endif
     if (reg_hd(path, newfd, msg_tag_get_val(tag)) == FALSE)
     {
         printf("The client service cache is full.\n");
diff --git a/mkrtos_user/lib/sys_svr/src/ns_svr.c b/mkrtos_user/lib/sys_svr/src/ns_svr.c
index b4aca3128..e1fd63a9c 100644
--- a/mkrtos_user/lib/sys_svr/src/ns_svr.c
+++ b/mkrtos_user/lib/sys_svr/src/ns_svr.c
@@ -38,6 +38,7 @@ RPC_GENERATION_OP2(ns_t, NS_PROT, NS_QUERY_OP, query,
     path->data[path->len - 1] = 0;
 
     int ret = namespace_query((char *)(path->data), &cli_hd->data);
+#if 0
     if (ret >= 0)
     {
         printf("The request service [%s] was successful, hd is %d.\n", (char *)(path->data), cli_hd->data);
@@ -46,6 +47,7 @@ RPC_GENERATION_OP2(ns_t, NS_PROT, NS_QUERY_OP, query,
     {
         printf("Failed to request service [%s]\n", (char *)(path->data));
     }
+#endif
     return ret;
 }
 
diff --git a/mkrtos_user/lib/sys_util/src/u_rpc_svr.c b/mkrtos_user/lib/sys_util/src/u_rpc_svr.c
index 2b61e5568..d583fa080 100644
--- a/mkrtos_user/lib/sys_util/src/u_rpc_svr.c
+++ b/mkrtos_user/lib/sys_util/src/u_rpc_svr.c
@@ -102,7 +102,9 @@ static msg_tag_t rpc_meta_t_dispatch(struct rpc_svr_obj *obj, msg_tag_t in_tag,
 
     if (msg_tag_get_prot(in_tag) == META_PROT)
     {
-        cons_write_str("unknow prot.\n");
+#if 0
+        cons_write_str("unknow prot.\n"); //FIXME:
+#endif
         return msg_tag_init4(0, 0, 0, -EPROTO);
     }
     else
@@ -112,8 +114,9 @@ static msg_tag_t rpc_meta_t_dispatch(struct rpc_svr_obj *obj, msg_tag_t in_tag,
 
         if (svr_obj == NULL)
         {
-            cons_write_str("unknow prot.\n");
-
+#if 0
+        cons_write_str("unknow prot.\n"); //FIXME:
+#endif
             return msg_tag_init4(0, 0, 0, -EPROTO);
         }
         if (svr_obj->dispatch == NULL)
diff --git a/mkrtos_user/lib/util/inc/u_path.h b/mkrtos_user/lib/util/inc/u_path.h
index 941f2ab7e..cb9edae60 100644
--- a/mkrtos_user/lib/util/inc/u_path.h
+++ b/mkrtos_user/lib/util/inc/u_path.h
@@ -1,3 +1,7 @@
 #pragma once
 
 void u_rel_path_to_abs(const char *cur_path, const char *path, char *new_path);
+static inline bool_t u_is_root_path(const char *path)
+{
+    return path[0] == '/' && path[1] == '\0';
+}
\ No newline at end of file
diff --git a/mkrtos_user/lib/util/src/u_path.c b/mkrtos_user/lib/util/src/u_path.c
index f9a326a4d..27917081c 100644
--- a/mkrtos_user/lib/util/src/u_path.c
+++ b/mkrtos_user/lib/util/src/u_path.c
@@ -60,6 +60,7 @@ static int path_name_cp(char *dst, const char *src, int src_inx, int *cp_len, in
 }
 /**
  * 相对路径转绝对路径
+ * TODO: new_path可能溢出，增加长度限制
  * @param cur_path 基路径
  * @param path 相对路径
  * @param new_path 输出的路径
diff --git a/mkrtos_user/server/fs/appfs/CMakeLists.txt b/mkrtos_user/server/fs/appfs/CMakeLists.txt
index e6f89daa4..8010827c5 100644
--- a/mkrtos_user/server/fs/appfs/CMakeLists.txt
+++ b/mkrtos_user/server/fs/appfs/CMakeLists.txt
@@ -69,6 +69,7 @@ target_include_directories(
     ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/sys/inc
     ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/sys_svr/inc
     ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/sys_util/inc
+    ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/util/inc
 
     ${CMAKE_CURRENT_SOURCE_DIR}/src
 )
@@ -99,6 +100,8 @@ add_custom_target(
     mkdir -p ${CMAKE_SOURCE_DIR}/build/output/cpio
     COMMAND
     cp appfs.bin ${CMAKE_SOURCE_DIR}/build/output/cpio/appfs
+    COMMAND
+    cp appfs.elf ${CMAKE_SOURCE_DIR}/build/output/
 )
 
 add_dependencies(appfs_dump appfs.elf)
diff --git a/mkrtos_user/server/fs/appfs/fs_rpc.c b/mkrtos_user/server/fs/appfs/fs_rpc.c
index e3ddea35f..f94c998b4 100644
--- a/mkrtos_user/server/fs/appfs/fs_rpc.c
+++ b/mkrtos_user/server/fs/appfs/fs_rpc.c
@@ -67,7 +67,7 @@ int fs_svr_fstat(int fd, void *_stat)
 {
     int ret;
 
-    ret = appfs_stat(fd, _stat);
+    ret = appfs_fstat(fd, _stat);
     return ret;
 }
 int fs_svr_ioctl(int fd, int req, void *arg)
@@ -106,7 +106,7 @@ int fs_svr_rename(char *oldname, char *newname)
 }
 int fs_svr_stat(const char *path, void *_buf)
 {
-    return -ENOSYS;
+    return appfs_stat(path, _buf);
 }
 ssize_t fs_svr_readlink(const char *path, char *buf, size_t bufsize)
 {
diff --git a/mkrtos_user/server/fs/appfs/main.c b/mkrtos_user/server/fs/appfs/main.c
index da11df115..0f65b1760 100644
--- a/mkrtos_user/server/fs/appfs/main.c
+++ b/mkrtos_user/server/fs/appfs/main.c
@@ -80,7 +80,7 @@ int main(int argc, char *argv[])
     ret = rpc_meta_init(THREAD_MAIN, &hd);
     assert(ret >= 0);
     fs_svr_init();
-    ns_register(mount_path, hd, MOUNT_NODE);
+    ns_register(mount_path, hd, 0);
     cons_write_str("appfs mount success\n");
 #if 0
     fs_svr_loop();
diff --git a/mkrtos_user/server/fs/appfs/src/appfs_open.c b/mkrtos_user/server/fs/appfs/src/appfs_open.c
index 5e12b095e..5ebf2d1f2 100644
--- a/mkrtos_user/server/fs/appfs/src/appfs_open.c
+++ b/mkrtos_user/server/fs/appfs/src/appfs_open.c
@@ -228,6 +228,7 @@ int appfs_read(int fd, void *data, int len)
 #include <u_task.h>
 #include <u_thread.h>
 #include <mk_access.h>
+#include "kstat.h"
 #endif
 int appfs_ioctl(int fd, unsigned long cmd, unsigned long arg)
 {
@@ -269,7 +270,7 @@ int appfs_ioctl(int fd, unsigned long cmd, unsigned long arg)
         fs_arg->size = appfs_get_file_size(dir_info_cache_list[file->dir_info_fd].info);
 #ifdef MKRTOS
         ret = mk_copy_mem_to_task(cur_pid, fs_arg, src_pid,
-                                  (void*)arg, sizeof(appfs_ioctl_arg_t));
+                                  (void *)arg, sizeof(appfs_ioctl_arg_t));
         if (ret < 0)
         {
             return ret;
@@ -381,7 +382,7 @@ int appfs_truncate(int fd, off_t length)
     ret = appfs_file_resize_raw(fs, dir_info_cache_list[file->dir_info_fd].info, length);
     return ret;
 }
-int appfs_stat(int fd, struct stat *st)
+int appfs_fstat(int fd, struct stat *st)
 {
     appfs_file_t *file = appfs_get_file(fd);
 
@@ -398,6 +399,28 @@ int appfs_stat(int fd, struct stat *st)
     st->st_nlink = dir_info_cache_list[file->dir_info_fd].info->ref;
     return 0;
 }
+int appfs_stat(const char *path, struct kstat *st)
+{
+    const dir_info_t *file;
+
+    if (path[0] == '\0' || (path[0] == '/' && path[1] == '\0'))
+    {
+        st->st_size = 0;
+        st->st_mode = S_IFDIR;
+        st->st_nlink = 0;
+        return 0;
+    }
+    file = appfs_find_file_by_name(fs, path);
+    if (file == NULL)
+    {
+        return -ENOENT;
+    }
+    st->st_size = file->size;
+    st->st_mode = S_IFREG;
+    st->st_nlink = file->ref;
+    return 0;
+}
+
 int appfs_close(int fd)
 {
     appfs_file_t *file = appfs_get_file(fd);
diff --git a/mkrtos_user/server/fs/appfs/src/appfs_open.h b/mkrtos_user/server/fs/appfs/src/appfs_open.h
index 832c8f0b1..1432bf4e4 100644
--- a/mkrtos_user/server/fs/appfs/src/appfs_open.h
+++ b/mkrtos_user/server/fs/appfs/src/appfs_open.h
@@ -2,6 +2,7 @@
 #include <sys/stat.h>
 #include <dirent.h>
 #include "appfs.h"
+#include "kstat.h"
 enum appfs_ioctl_cmd_op
 {
     APPFS_IOCTOL_GET_ACCESS_ADDR,
@@ -17,7 +18,8 @@ int appfs_write(int fd, void *data, int len);
 int appfs_read(int fd, void *data, int len);
 int appfs_ioctl(int fd, unsigned long cmd, unsigned long arg);
 int appfs_lseek(int fd, int offset, unsigned long whence);
-int appfs_stat(int fd, struct stat *st);
+int appfs_fstat(int fd, struct stat *st);
+int appfs_stat(const char *path, struct kstat *st);
 int appfs_close(int fd);
 int appfs_remove(const char *name);
 int appfs_truncate(int fd, off_t length);
diff --git a/mkrtos_user/server/fs/cpiofs/main.c b/mkrtos_user/server/fs/cpiofs/main.c
index 5339ae53d..f582ec68a 100644
--- a/mkrtos_user/server/fs/cpiofs/main.c
+++ b/mkrtos_user/server/fs/cpiofs/main.c
@@ -55,7 +55,7 @@ int main(int argc, char *argv[])
     ret = rpc_meta_init(THREAD_MAIN, &hd);
     assert(ret >= 0);
     fs_svr_init();
-    ns_register(mount_path, hd, MOUNT_NODE);
+    ns_register(mount_path, hd, 0);
     cons_write_str("cpiofs mount success\n");
 
     fs_svr_loop();
diff --git a/mkrtos_user/server/fs/fatfs/main.c b/mkrtos_user/server/fs/fatfs/main.c
index 804c44092..946a2f7ad 100644
--- a/mkrtos_user/server/fs/fatfs/main.c
+++ b/mkrtos_user/server/fs/fatfs/main.c
@@ -38,7 +38,7 @@ int main(int args, char *argv[])
     ret = rpc_meta_init(THREAD_MAIN, &hd);
     assert(ret >= 0);
     fs_svr_init();
-    ns_register("/mnt", hd, MOUNT_NODE);
+    ns_register("/mnt", hd, 0);
 
     FRESULT res = f_mount(&fs, "0:", 1);
 
diff --git a/mkrtos_user/server/fs/lxext4/main.c b/mkrtos_user/server/fs/lxext4/main.c
index b52cac9fd..6111ba921 100644
--- a/mkrtos_user/server/fs/lxext4/main.c
+++ b/mkrtos_user/server/fs/lxext4/main.c
@@ -20,7 +20,7 @@ int main(int argv, char *args[])
     ret = rpc_meta_init(THREAD_MAIN, &hd);
     assert(ret >= 0);
     fs_svr_init();
-    ns_register("/vfs_test", hd, MOUNT_NODE);
+    ns_register("/vfs_test", hd, 0);
     printf("cpiofs mount success\n");
 
     fs_svr_loop();
diff --git a/mkrtos_user/server/init/CMakeLists.txt b/mkrtos_user/server/init/CMakeLists.txt
index 871e94f1d..b8e553067 100644
--- a/mkrtos_user/server/init/CMakeLists.txt
+++ b/mkrtos_user/server/init/CMakeLists.txt
@@ -40,6 +40,7 @@ target_include_directories(
     ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/cutest
 
     ${CMAKE_SOURCE_DIR}/mkrtos_user/server/init/src
+    ${CMAKE_SOURCE_DIR}/mkrtos_user/server/init/src/nsfs
 )
 set_target_properties(init.elf PROPERTIES LINK_FLAGS
 "-T ${CMAKE_CURRENT_LIST_DIR}/${ARCH_NAME}/link.lds ${CORTEX_M_LINK_FLAGS} --gc-section  -no-dynamic-linker "
diff --git a/mkrtos_user/server/init/src/namespace.c b/mkrtos_user/server/init/src/namespace.c
index 2cec2c71d..eb014800b 100644
--- a/mkrtos_user/server/init/src/namespace.c
+++ b/mkrtos_user/server/init/src/namespace.c
@@ -28,379 +28,40 @@
 #include "u_ipc.h"
 #include "u_rpc_svr.h"
 #include "u_slist.h"
+#include "nsfs.h"
 static ns_t ns;
 static fs_t ns_fs;
-static pthread_spinlock_t lock;
-int ns_reg(const char *path, obj_handler_t hd, enum node_type type);
-int ns_node_free(ns_node_t *node);
-static int find_path(const char *name);
 
 static obj_handler_t ns_hd;
 
-static void ns_lock(void) { pthread_spin_lock(&lock); }
-static void ns_unlock(void) { pthread_spin_unlock(&lock); }
-/**
- * @brief 查找每一个节点，并进行删除
- *
- * @param head
- * @param pid
- * @param to_del
- */
-static void _ns_node_del_by_pid(slist_head_t *head, pid_t pid, int to_del)
-{
-    ns_node_t *pos;
-
-    slist_foreach_not_next(pos, head, node)
-    {
-        ns_node_t *next = slist_next_entry(pos, head, node);
-
-        if (pos->type != DIR_NODE) {
-            if (pid == pos->pid) {
-                if (ns_node_free(pos) == 0) {
-                    if (to_del) {
-                        // task_unmap(TASK_THIS,
-                        // vpage_create_raw3(KOBJ_DELETE_RIGHT, 0,
-                        // pos->node_hd));
-                        handler_del_umap(pos->node_hd);
-                    }
-                }
-            }
-        } else {
-            _ns_node_del_by_pid(&pos->sub_dir, pid, to_del);
-        }
-
-        pos = next;
-    }
-}
-/**
- * @brief 从ns删除某个task注册的所有节点
- *
- * @param pid
- * @param to_del
- */
-void ns_node_del_by_pid(pid_t pid, int to_del)
-{
-    ns_lock();
-    _ns_node_del_by_pid(&ns.root_node.sub_dir, pid, to_del);
-    ns_unlock();
-}
-/**
- * @brief 初始化一个节点
- *
- * @param new_node
- * @param parent
- * @param name
- * @param hd
- * @param type
- * @return ns_node_t*
- */
-static ns_node_t *node_init(ns_node_t *new_node, ns_node_t *parent,
-                            const char *name, obj_handler_t hd,
-                            enum node_type type)
-{
-    strncpy(new_node->node_name, name, sizeof(new_node->node_name));
-    new_node->node_name[sizeof(new_node->node_name) - 1] = 0;
-    new_node->ref = 1;
-    new_node->type = type;
-    new_node->parent = parent;
-    new_node->pid = thread_get_src_pid();
-    if (parent) {
-        parent->ref++; //! 父目录的引用计数+1
-    }
-    slist_init(&new_node->node);
-    switch (type) {
-    case DIR_NODE:
-        slist_init(&new_node->sub_dir);
-        break;
-    case FILE_NODE:
-    case MOUNT_NODE:
-        new_node->node_hd = hd;
-        break;
-    case SYM_NODE:
-        new_node->sym_path[0] = 0;
-        break;
-    default:
-        break;
-    }
-    return new_node;
-}
-/**
- * @brief Create a node object
- *
- * @param dir
- * @param name
- * @param hd
- * @param typef
- * @return ns_node_t*
- */
-static ns_node_t *create_node(ns_node_t *parent, const char *name,
-                              obj_handler_t hd, enum node_type type)
-{
-    ns_node_t *new_node = malloc(sizeof(*new_node));
-
-    if (new_node == NULL) {
-        return NULL;
-    }
-    node_init(new_node, parent, name, hd, type);
-    return new_node;
-}
-/**
- * @brief 路径分割
- *
- * @param name
- * @return int
- */
-static int path_split(const char *name)
-{
-    int i = -1;
-
-    for (i = 0; name[i]; i++) {
-        if (name[i] == '/') {
-            break;
-        }
-    }
-    return i;
-}
-/**
- * @brief 找到某个节点
- *
- * @param dir
- * @param name
- * @param ret_inx
- * @return ns_node_t*
- */
-static ns_node_t *node_lookup(ns_node_t *dir, const char *name,
-                              size_t *ret_inx)
-{
-    int inx = -1;
-    int find_inx = 0;
-    int r_inx = 0;
-    ns_node_t *node = NULL;
-    bool_t find = FALSE;
-
-    if (dir->type != DIR_NODE) {
-        return NULL;
-    }
-    if (name[0] == 0) {
-        *ret_inx = 0;
-        return dir;
-    }
-    node = dir;
-    if (name[0] == '/') {
-        find_inx++;
-        r_inx++;
-    }
-    find = TRUE;
-
-    while (1) {
-        ns_node_t *pos;
-
-        inx = path_split(name + find_inx);
-        if (inx <= 0) {
-            break;
-        }
-        slist_foreach(pos, &(node->sub_dir), node)
-        {
-            if (strncmp(name + find_inx, pos->node_name, inx) != 0) {
-                continue;
-            }
-            switch (pos->type) {
-            case DIR_NODE: {
-                // dir
-                node = pos;
-                r_inx += inx;
-                find = TRUE;
-            } break;
-            case FILE_NODE:
-            case MOUNT_NODE: {
-                find = TRUE;
-                r_inx += inx;
-                node = pos;
-                goto end;
-            } break;
-            case SYM_NODE: {
-                size_t ret_inx;
-                ns_node_t *sym_node =
-                    node_lookup(&ns.root_node, pos->sym_path, &ret_inx);
-
-                if (sym_node == NULL) {
-                    return NULL;
-                }
-                node = sym_node;
-                r_inx += inx;
-                find = TRUE;
-            } break;
-            default:
-                assert(0);
-                break;
-            }
-            break;
-        }
-        find_inx += inx;
-    }
-end:
-    if (!find) {
-        return NULL;
-    }
-    if (ret_inx) {
-        if (name[r_inx] == '/') {
-            r_inx++;
-        }
-        *ret_inx = r_inx;
-    }
-    return node;
-}
-/**
- * @brief 释放一个节点
- *
- * @param node
- */
-int ns_node_free(ns_node_t *node)
-{
-    int ref = 0;
-    if (!node) {
-        return 0;
-    }
-    if (node->ref == 1) {
-        //!< 父级目录的引用计数-1
-        ns_node_free(node->parent);
-    }
-    node->ref--;
-    ref = node->ref;
-    if (node->ref <= 0) {
-        switch (node->type) {
-        case DIR_NODE:
-            assert(slist_is_empty(&node->sub_dir));
-            break;
-        case FILE_NODE:
-        case MOUNT_NODE:
-            handler_free_umap(node->node_hd);
-            break;
-        default:
-            assert(0);
-            break;
-        }
-        if (slist_in_list(&node->node)) {
-            slist_del(&node->node);
-        }
-        free(node);
-    }
-    return ref;
-}
-
 int fs_svr_open(const char *path, int flags, int mode)
 {
-    ns_node_t *node;
-    size_t ret_inx;
-    int len;
-
-    // again:
-    node = node_lookup(&ns.root_node, path, &ret_inx);
-    if (!node) {
-        return -ENOENT;
-    }
-    len = strlen(path);
-    if (len != ret_inx) {
-        /* 这里应该用mkdir创建
-        if (flags & O_CREAT)
-        {
-            int ret = ns_reg(path, 0, DIR_NODE);
-
-            if (ret < 0)
-            {
-                return ret;
-            }
-            goto again;
-        }
-        */
-        return -ENOENT;
-    }
-    file_desc_t *fd_p = fd_alloc(node);
-
-    if (!fd_p) {
-        return -ENOMEM;
-    }
-    node->ref++;
-    return 0;
+    return fs_ns_open(path, flags, mode);
 }
 
 int fs_svr_readdir(int fd, dirent_t *dir)
 {
-    bool_t is_dec_ref = 0;
-    file_desc_t *fdp = fd_get(fd);
-
-    if (!fdp) {
-        return -ENOENT;
-    }
-    if (fdp->node_iter == (void *)((umword_t)(-1))) {
-        return -ENOENT;
-    }
-    if (fdp->node_iter == NULL) {
-        // 首次迭代
-        if (slist_is_empty(&fdp->node->sub_dir)) {
-            return -ENOENT;
-        }
-        // 获得第一个节点
-        fdp->node_iter =
-            container_of(slist_first(&fdp->node->sub_dir), ns_node_t, node);
-        fdp->node_iter->ref++;
-    }
-
-    // 拷贝数据
-    dir->d_type = fdp->node_iter->type == FILE_NODE ? DT_CHR : DT_DIR;
-    dir->d_reclen = sizeof(*dir);
-    strncpy(dir->d_name, fdp->node_iter->node_name, sizeof(dir->d_name));
-    dir->d_name[sizeof(dir->d_name) - 1] = 0;
-    dir->d_ino = 0;
-    slist_head_t *next = fdp->node_iter->node.next;
-
-    ns_node_free(fdp->node_iter);
-    if (next == &fdp->node->sub_dir) {
-        // 到达结尾
-        fdp->node_iter = (void *)((umword_t)(-1));
-        return sizeof(*dir);
-    } else {
-        ns_node_t *next_n = container_of(next, ns_node_t, node);
-
-        fdp->node_iter = next_n;
-        next_n->ref++;
-    }
-    return sizeof(*dir);
+    return fs_ns_readdir(fd, dir);
 }
 void fs_svr_close(int fd)
 {
-    file_desc_t *fdp = fd_get(fd);
-
-    if (!fdp) {
-        return;
-    }
-    if (fdp->node_iter && fdp->node_iter != (void *)(-1)) {
-        // 最后一个迭代的节点需要删除
-        ns_node_free(fdp->node_iter);
-    }
-    ns_node_free(fdp->node);
-    fd_free(fd);
+    fs_ns_close(fd);
 }
 int fs_svr_unlink(const char *path)
 {
-    ns_node_t *node;
-    size_t ret_inx;
+    return -ENOSYS;
+}
+int fs_svr_mkdir(char *path)
+{
+    return fs_ns_mkdir(path);
+}
+int fs_svr_stat(const char *path, void *_buf)
+{
+    struct kstat *buf = (struct kstat *)_buf;
+    int ret;
 
-    node = node_lookup(&ns.root_node, path, &ret_inx);
-    if (!node) {
-        return -EEXIST;
-    }
-    if (node && ret_inx == strlen(path)) {
-        if (node->ref == 1) {
-            ns_node_free(node);
-        } else {
-            return -ENOTEMPTY;
-        }
-    } else {
-        return -ENOENT;
-    }
-
-    return 0;
+    ret = fs_ns_stat(path, buf);
+    return ret;
 }
 /**
  * @brief 创建一个软链接节点
@@ -411,89 +72,7 @@ int fs_svr_unlink(const char *path)
  */
 int fs_svr_symlink(const char *src, const char *dst)
 {
-    ns_node_t *node;
-    size_t ret_inx;
-    int len;
-    printf("%s:%d. %s --> %s\n", __func__, __LINE__, src, dst);
-
-    node = node_lookup(&ns.root_node, dst, &ret_inx);
-    if (!node) {
-        return -ENOENT;
-    }
-    len = strlen(dst);
-    if (len == ret_inx) {
-        // 已经存在
-        return -EEXIST;
-    }
-    int inx = find_path(dst);
-
-    if (ret_inx != inx) {
-        // 父级目录不存在
-        return -ENOENT;
-    }
-    ns_node_t *new_node = create_node(&ns.root_node, dst + inx, 0, SYM_NODE);
-
-    if (!new_node) {
-        return -ENOMEM;
-    }
-    strncpy(new_node->sym_path, src, NAMESPACE_PATH_LEN);
-    new_node->sym_path[NAMESPACE_PATH_LEN - 1] = 0;
-    assert(node->type == DIR_NODE);
-    slist_add_append(&node->sub_dir, &new_node->node);
-    return 0;
-}
-
-static int find_path(const char *name)
-{
-    int len = strlen(name);
-
-    for (int i = len; i >= 0; i--) {
-        if (name[i] == '/') {
-            return i + 1;
-        }
-    }
-    return -1;
-}
-/**
- * @brief 注册一个节点
- *
- * @param path
- * @param hd
- * @return int
- */
-int ns_reg(const char *path, obj_handler_t hd, enum node_type type)
-{
-    size_t ret_inx;
-    ns_node_t *new_node;
-    ns_node_t *node;
-
-    node = node_lookup(&ns.root_node, path, &ret_inx);
-    if (!node) {
-        return -EEXIST;
-    }
-    if (node && ret_inx == strlen(path)) {
-        handler_free_umap(hd);
-        return -EEXIST;
-    }
-    int inx = find_path(path);
-
-    if (ret_inx != inx) {
-        if (inx == -1) {
-            inx = ret_inx;
-        } else {
-            handler_free_umap(hd);
-            return -ENOENT;
-        }
-    }
-    new_node = create_node(node, path + inx, hd, type);
-    if (!new_node) {
-        handler_free_umap(hd);
-        return -ENOMEM;
-    }
-
-    slist_add_append(&node->sub_dir, &new_node->node);
-
-    return 0;
+    return -ENOSYS;
 }
 
 /**
@@ -505,14 +84,9 @@ int ns_reg(const char *path, obj_handler_t hd, enum node_type type)
  */
 int namespace_register(const char *path, obj_handler_t hd, int type)
 {
-    if (type == DIR_NODE) {
-        handler_free_umap(hd);
-        return -ECANCELED;
-    }
-    ns_lock();
-    int ret = ns_reg(path, hd, type);
-    ns_unlock();
-    printf("register svr, name is %s, hd is %d\n", path, hd);
+    int ret;
+
+    ret = ns_mknode(path, hd, NODE_TYPE_SVR);
     return ret;
 }
 /**
@@ -524,63 +98,21 @@ int namespace_register(const char *path, obj_handler_t hd, int type)
  */
 int namespace_query(const char *path, obj_handler_t *hd)
 {
-    assert(hd);
-    size_t ret_inx;
-    ns_node_t *new_node;
-    ns_node_t *node;
+    int ret;
 
-    if (path[0] == '/' && path[1] == 0) {
-        *hd = ns_hd;
-        return 1;
-    }
-    ns_lock();
-    node = node_lookup(&ns.root_node, path, &ret_inx);
-    if (!node) {
-        ns_unlock();
-        return -EEXIST;
-    }
-    // if (ret_inx == strlen(path))
-    // {
-    //     ns_unlock();
-    //     return -EEXIST;
-    // }
-    if (node == &ns.root_node) {
-        *hd = ns_hd;
-    } else {
-        if (node->type == DIR_NODE) {
-            ns_unlock();
-            return -ENOENT;
-        }
-        *hd = node->node_hd;
-    }
-    ns_unlock();
-    return ret_inx;
-}
-#if 0
-void namespace_loop(void)
-{
-    rpc_loop();
-    // rpc_mtd_loop();
-}
-#endif
-int fs_svr_mkdir(char *path)
-{
-    int ret = ns_reg(path, 0, DIR_NODE);
-
-    if (ret < 0) {
-        printf("ns mkdir %s is faile : %d\n", path, ret);
-    }
+    ret = ns_find_svr_obj(path, hd);
     return ret;
 }
 
 static const fs_operations_t ops =
-{
+    {
         .fs_svr_mkdir = fs_svr_mkdir,
         .fs_svr_symlink = fs_svr_symlink,
         .fs_svr_unlink = fs_svr_unlink,
         .fs_svr_close = fs_svr_close,
         .fs_svr_readdir = fs_svr_readdir,
         .fs_svr_open = fs_svr_open,
+        .fs_svr_stat = fs_svr_stat,
 };
 void namespace_init(obj_handler_t ipc_hd)
 {
@@ -589,7 +121,7 @@ void namespace_init(obj_handler_t ipc_hd)
     meta_reg_svr_obj(&ns.svr, NS_PROT);
     meta_reg_svr_obj(&ns_fs.svr, FS_PROT);
     thread_set_src_pid(0);
-    node_init(&ns.root_node, NULL, "", 0, DIR_NODE);
     ns_hd = ipc_hd;
+    ns_root_node_init(ipc_hd);
     // printf("ns svr init...\n");
 }
diff --git a/mkrtos_user/server/init/src/nsfs/ns.c b/mkrtos_user/server/init/src/nsfs/ns.c
index ac5fd8b9b..14103e25e 100644
--- a/mkrtos_user/server/init/src/nsfs/ns.c
+++ b/mkrtos_user/server/init/src/nsfs/ns.c
@@ -17,6 +17,11 @@
 static ns_node_t root_node = {
     .type = NODE_TYPE_DUMMY,
 };
+
+void ns_root_node_init(obj_handler_t hd)
+{
+    root_node.svr_hd = hd;
+}
 /**
  * 从路径中copy名字
  */
@@ -169,6 +174,7 @@ ns_node_t *ns_node_find(ns_node_t **pnode, const char *path, int *ret, int *svr_
         name[MIN(NS_NODE_NAME_LEN - 1, len)] = 0;
         if (len == 0)
         {
+            // find_node_cut_inx++;
             goto end;
         }
         // 查找子节点
@@ -272,7 +278,9 @@ ns_node_t *ns_node_find_full_dir(const char *path, int *ret, int *cur_inx)
     dir_node = ns_node_find(NULL, path, ret, cur_inx, NULL);
     if (dir_node == NULL || dir_node->type != NODE_TYPE_DUMMY || *cur_inx != 0)
     {
+#if 0
         printf("ns node not find or path error.\n");
+#endif
         // 未找到，节点不是dummy节点，路径不是结尾处 则直接退出
         *ret = -ENOENT;
         return NULL;
@@ -293,7 +301,9 @@ ns_node_t *ns_node_find_full_file(const char *path, int *ret, int *cur_inx)
     dir_node = ns_node_find(NULL, path, ret, cur_inx, NULL);
     if (dir_node == NULL || dir_node->type != NODE_TYPE_SVR || path[*cur_inx] != '\0')
     {
+#if 0
         printf("ns node not find or path error.\n");
+#endif
         // 未找到，节点不是 svr 节点，路径不是结尾处 则直接退出
         *ret = -ENOENT;
         return NULL;
@@ -301,6 +311,10 @@ ns_node_t *ns_node_find_full_file(const char *path, int *ret, int *cur_inx)
 
     return dir_node;
 }
+static inline int is_root_node(ns_node_t *node)
+{
+    return node == &root_node;
+}
 ns_node_t *ns_node_find_svr_file(const char *path, int *ret, int *cur_inx)
 {
     assert(path);
@@ -309,9 +323,16 @@ ns_node_t *ns_node_find_svr_file(const char *path, int *ret, int *cur_inx)
     ns_node_t *dir_node;
 
     dir_node = ns_node_find(NULL, path, ret, cur_inx, NULL);
+    if (is_root_node(dir_node))
+    {
+        (*cur_inx)++;
+        return dir_node;
+    }
     if (dir_node == NULL || dir_node->type != NODE_TYPE_SVR)
     {
+#if 0
         printf("ns node not find or path error.\n");
+#endif
         // 未找到，节点不是 svr 节点，路径不是结尾处 则直接退出
         *ret = -ENOENT;
         return NULL;
@@ -319,6 +340,22 @@ ns_node_t *ns_node_find_svr_file(const char *path, int *ret, int *cur_inx)
 
     return dir_node;
 }
+int ns_find_svr_obj(const char *path, obj_handler_t *svr_hd)
+{
+    assert(path);
+    assert(svr_hd);
+    ns_node_t *svr_node;
+    int ret;
+    int cur_inx;
+
+    svr_node = ns_node_find_svr_file(path, &ret, &cur_inx);
+    if (svr_node == NULL || ret < 0)
+    {
+        return -ENOENT;
+    }
+    *svr_hd = svr_node->svr_hd;
+    return cur_inx;
+}
 /**
  * 创建一个节点
  * 只能在前置节点全部为dummy的节点里面创建节点
diff --git a/mkrtos_user/server/init/src/nsfs/ns.h b/mkrtos_user/server/init/src/nsfs/ns.h
index 334b8edaf..1ac098636 100644
--- a/mkrtos_user/server/init/src/nsfs/ns.h
+++ b/mkrtos_user/server/init/src/nsfs/ns.h
@@ -2,22 +2,24 @@
 
 #include <assert.h>
 #include <stdint.h>
-
+#ifdef MKRTOS
+#include <ns_types.h>
+#endif
 #ifndef MIN
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #endif
 
-#define NS_NODE_NAME_LEN 32
 #ifndef MKRTOS
 typedef unsigned long obj_handler_t;
 #define HANDLER_INVALID ((obj_handler_t)(-1))
-#else
-#include <u_types.h>
-#endif
+
+#define NS_NODE_NAME_LEN 32
+
 typedef enum node_type
 {
     NODE_TYPE_DUMMY, //!< 虚拟节点，可以有子节点
     NODE_TYPE_SVR,   //!< 服务节点，不能有子节点
+    NODE_TYPE_ROOT,  //!< ROOT节点
 } node_type_t;
 
 typedef struct ns_node
@@ -26,14 +28,18 @@ typedef struct ns_node
     node_type_t type;            //!< 节点类型
     struct ns_node *parent;      //!< 父节点
     struct ns_node *next;        //!< 下一个
-    union
-    {
+    // union
+    // {
         struct ns_node *sub;  //!< 子树
         obj_handler_t svr_hd; //!< 服务节点
-    };
+    // };
     int ref; //!< 引用计数
 } ns_node_t;
+#else
+#include <u_types.h>
+#endif
 
+void ns_root_node_init(obj_handler_t hd);
 ns_node_t *ns_node_find(ns_node_t **pnode, const char *path, int *ret, int *svr_inx, int *p_inx);
 ns_node_t *ns_node_find_full_dir(const char *path, int *ret, int *cur_inx);
 ns_node_t *ns_node_find_full_file(const char *path, int *ret, int *cur_inx);
@@ -52,3 +58,4 @@ static inline ns_node_t *ns_node_get_first(ns_node_t *tree_node)
     assert(tree_node);
     return tree_node->sub;
 }
+int ns_find_svr_obj(const char *path, obj_handler_t *svr_hd);
diff --git a/mkrtos_user/server/init/src/nsfs/nsfs.c b/mkrtos_user/server/init/src/nsfs/nsfs.c
index d7736f946..7d85552ad 100644
--- a/mkrtos_user/server/init/src/nsfs/nsfs.c
+++ b/mkrtos_user/server/init/src/nsfs/nsfs.c
@@ -9,7 +9,7 @@
 #include <unistd.h>
 #include <dirent.h>
 #include "ns.h"
-
+#include "kstat.h"
 #define DIR_INFO_CACHE_NR 32
 
 typedef struct dir_info_cache
@@ -242,7 +242,7 @@ int fs_ns_truncate(int fd, off_t length)
 {
     return -ENOSYS;
 }
-int fs_ns_stat(int fd, struct stat *st)
+int fs_ns_fstat(int fd, struct kstat *st)
 {
     fs_ns_file_t *file = fs_ns_get_file(fd);
 
@@ -256,6 +256,29 @@ int fs_ns_stat(int fd, struct stat *st)
     st->st_nlink = dir_info_cache_list[file->dir_info_fd].info->ref;
     return 0;
 }
+int fs_ns_stat(const char *path, struct kstat *st)
+{
+    memset(st, 0, sizeof(*st));
+
+    ns_node_t *file;
+    int ret;
+    int cur_inx;
+
+    file = ns_node_find_full_dir(path, &ret, &cur_inx);
+    if (file == NULL)
+    {
+        file = ns_node_find_full_file(path, &ret, &cur_inx);
+        if (file == NULL)
+        {
+            return -ENOENT;
+        }
+    }
+
+    st->st_size = 0;
+    st->st_mode = file->type != NODE_TYPE_DUMMY ? S_IFREG : S_IFDIR;
+    st->st_nlink = file->ref;
+    return 0;
+}
 int fs_ns_close(int fd)
 {
     fs_ns_file_t *file = fs_ns_get_file(fd);
diff --git a/mkrtos_user/server/init/src/nsfs/nsfs.h b/mkrtos_user/server/init/src/nsfs/nsfs.h
index 5c05c0acf..47717483e 100644
--- a/mkrtos_user/server/init/src/nsfs/nsfs.h
+++ b/mkrtos_user/server/init/src/nsfs/nsfs.h
@@ -2,13 +2,15 @@
 #include <fcntl.h>
 #include <dirent.h>
 #include "ns.h"
+#include "kstat.h"
 int fs_ns_open(const char *name, int flags, int mode);
 int fs_ns_write(int fd, void *data, int len);
 int fs_ns_read(int fd, void *data, int len);
 int fs_ns_ioctl(int fd, unsigned long cmd, unsigned long arg);
 int fs_ns_lseek(int fd, int offset, unsigned long whence);
 int fs_ns_truncate(int fd, off_t length);
-int fs_ns_stat(int fd, struct stat *st);
+int fs_ns_fstat(int fd, struct kstat *st);
+int fs_ns_stat(const char *path, struct kstat *st);
 int fs_ns_close(int fd);
 int fs_ns_remove(const char *name);
 int fs_ns_readdir(int fd, struct dirent *_dir);
diff --git a/mkrtos_user/server/init/src/pm.c b/mkrtos_user/server/init/src/pm.c
index bff2cf515..78457caf3 100644
--- a/mkrtos_user/server/init/src/pm.c
+++ b/mkrtos_user/server/init/src/pm.c
@@ -195,7 +195,7 @@ int pm_rpc_kill_task(int pid, int flags)
         return -EINVAL;
     }
 
-    ns_node_del_by_pid(pid, flags);          //!< 从ns中删除
+    // ns_node_del_by_pid(pid, flags); TODO:         //!< 从ns中删除
     pm_del_watch_by_pid(&pm, pid);           //!< 从watch中删除
 #if IS_ENABLED(CONFIG_USING_SIG)
     pm_send_sig_to_task(&pm, pid, KILL_SIG); //!< 给watch者发送sig
diff --git a/mkrtos_user/server/init/src/test/temp/ns_test.c b/mkrtos_user/server/init/src/test/temp/ns_test.c
index 155dee5de..7dce2bfd3 100644
--- a/mkrtos_user/server/init/src/test/temp/ns_test.c
+++ b/mkrtos_user/server/init/src/test/temp/ns_test.c
@@ -14,15 +14,15 @@ int ns_reg(const char *path, obj_handler_t hd, enum node_type type);
 void ns_test(void)
 {
     int ret;
-    ret = ns_reg("/", 0, FILE_NODE);
+    ret = ns_reg("/", 0, 0);
     assert(ret < 0);
-    ret = ns_reg("/test", 0, FILE_NODE);
+    ret = ns_reg("/test", 0, 0);
     assert(ret >= 0);
-    ret = ns_reg("/test", 0, FILE_NODE);
+    ret = ns_reg("/test", 0, 0);
     assert(ret < 0);
-    ret = ns_reg("/test1", 0, DIR_NODE);
+    ret = ns_reg("/test1", 0, 0);
     assert(ret >= 0);
-    ret = ns_reg("/test2", 0, MOUNT_NODE);
+    ret = ns_reg("/test2", 0, 0);
     assert(ret >= 0);
 
     int fd;
diff --git a/mkrtos_user/server/net/src/main.c b/mkrtos_user/server/net/src/main.c
index 9db6b7ce3..4fbca4037 100644
--- a/mkrtos_user/server/net/src/main.c
+++ b/mkrtos_user/server/net/src/main.c
@@ -23,15 +23,16 @@ static umword_t addr;
 static umword_t size;
 obj_handler_t net_drv_hd = HANDLER_INVALID;
 
-#define STACK_COM_ITME_SIZE (2 * 1024/*sizeof(struct pthread) + TP_OFFSET*/)
-#define STACK_NUM           4
+#define STACK_COM_ITME_SIZE (2 * 1024 /*sizeof(struct pthread) + TP_OFFSET*/)
+#define STACK_NUM 4
 ATTR_ALIGN(8)
 static uint8_t stack_coms[STACK_COM_ITME_SIZE * STACK_NUM];
 static uint8_t msg_buf_coms[MSG_BUG_LEN * STACK_NUM];
 static obj_handler_t com_th_obj[STACK_NUM];
 static void fast_ipc_init(void)
 {
-    for (int i = 0; i < STACK_NUM; i++) {
+    for (int i = 0; i < STACK_NUM; i++)
+    {
         com_th_obj[i] = handler_alloc();
         assert(com_th_obj[i] != HANDLER_INVALID);
     }
@@ -45,22 +46,25 @@ int main(int args, char *argv[])
     obj_handler_t hd;
     obj_handler_t sem_hd;
     obj_handler_t shm_hd;
-    int count_net_link =0 ;
+    int count_net_link = 0;
     task_set_obj_name(TASK_THIS, TASK_THIS, "tk_net");
     task_set_obj_name(TASK_THIS, THREAD_MAIN, "th_net");
     printf("net startup..\n");
     fast_ipc_init();
     ret = rpc_meta_init(THREAD_MAIN, &hd);
-    if (ret < 0) {
+    if (ret < 0)
+    {
         printf("rpc meta init failed\n");
         return -1;
     }
 again:
     ret = ns_query("/eth", &net_drv_hd, 0x1);
-    if (ret < 0) {
+    if (ret < 0)
+    {
         u_sleep_ms(50);
         count_net_link++;
-        if (count_net_link < 20) {
+        if (count_net_link < 20)
+        {
             goto again;
         }
     }
@@ -74,49 +78,63 @@ again:
     IP_ADDR4(&perf_server_ip, IP_ADDR0, IP_ADDR1, IP_ADDR2, IP_ADDR3);
     lwiperf_start_tcp_server(&perf_server_ip, 9527, NULL, NULL);
 
-    if (net_drv_hd != HANDLER_INVALID) {
-        if (blk_drv_cli_map(net_drv_hd, &sem_hd) < 0) {
+    if (net_drv_hd != HANDLER_INVALID)
+    {
+        if (blk_drv_cli_map(net_drv_hd, &sem_hd) < 0)
+        {
             printf("net drv sem map error.\n");
             return -1;
         }
 
         shm_hd = handler_alloc();
-        if (shm_hd == HANDLER_INVALID) {
+        if (shm_hd == HANDLER_INVALID)
+        {
             printf("handler alloc failed.\n");
             return -1;
         }
         tag = facotry_create_share_mem(FACTORY_PROT, vpage_create_raw3(KOBJ_ALL_RIGHTS, 0, shm_hd),
-                                    SHARE_MEM_CNT_BUDDY_CNT, 2048);
-        if (msg_tag_get_val(tag) < 0) {
+                                       SHARE_MEM_CNT_BUDDY_CNT, 2048);
+        if (msg_tag_get_val(tag) < 0)
+        {
             printf("share mem create failed.\n");
             return -1;
         }
         tag = share_mem_map(shm_hd, vma_addr_create(VPAGE_PROT_RW, VMA_ADDR_RESV, 0), &addr, &size);
-        if (msg_tag_get_val(tag) < 0) {
+        if (msg_tag_get_val(tag) < 0)
+        {
             printf("share mem map failed.\n");
             return -1;
         }
     }
 
-    ret = ns_register("/net", hd, MOUNT_NODE);
-    if (ret < 0) {
+    ret = ns_register("/net", hd, 0);
+    if (ret < 0)
+    {
         printf("ns reg failed.\n");
         return -1;
     }
     cons_write_str("net mount success\n");
     // net_test();
-    while (1) {
+    while (1)
+    {
         int ret;
 
-        if (net_drv_hd != HANDLER_INVALID) {
-            if (msg_tag_get_prot(u_sema_down(sem_hd, 0, NULL)) < 0) {
+        if (net_drv_hd != HANDLER_INVALID)
+        {
+            if (msg_tag_get_prot(u_sema_down(sem_hd, 0, NULL)) < 0)
+            {
                 printf("error.\n");
             }
             ret = blk_drv_cli_read(net_drv_hd, shm_hd, 0, 0);
-            if (ret > 0) {
+            if (ret > 0)
+            {
                 lwip_pkt_handle_raw((uint8_t *)addr, ret);
             }
         }
+        else
+        {
+            u_sleep_ms(0);
+        }
     }
     return 0;
 }
diff --git a/mkrtos_user/user/app/misc/dm9000_drv/src/main.c b/mkrtos_user/user/app/misc/dm9000_drv/src/main.c
index e0aedebb8..0d58b00ff 100644
--- a/mkrtos_user/user/app/misc/dm9000_drv/src/main.c
+++ b/mkrtos_user/user/app/misc/dm9000_drv/src/main.c
@@ -70,7 +70,7 @@ int main(int argc, char *args[])
     assert(ret >= 0);
     meta_reg_svr_obj(&net_drv.svr, BLK_DRV_PROT);
 
-    assert(ns_register("/dm9000", hd, MOUNT_NODE) >= 0);
+    assert(ns_register("/dm9000", hd, 0) >= 0);
     mk_printf("dm9000 reg success\n");
 
     assert(DM9000_Init(1) == 0);
diff --git a/mkrtos_user/user/app/misc/mr_drv/src/main.c b/mkrtos_user/user/app/misc/mr_drv/src/main.c
index 16c921c10..158dbb558 100644
--- a/mkrtos_user/user/app/misc/mr_drv/src/main.c
+++ b/mkrtos_user/user/app/misc/mr_drv/src/main.c
@@ -9,7 +9,7 @@
 #include <mr_api.h>
 int main(int argc, char *args[])
 {
-    ns_register("/dev", drv_svr_init(), MOUNT_NODE);
+    ns_register("/dev", drv_svr_init(), 0);
     mr_auto_init();
     printf("mr drv start success...\n");
     drv_svr_loop();
diff --git a/mkrtos_user/user/drv/ATSURFF437/block/main.c b/mkrtos_user/user/drv/ATSURFF437/block/main.c
index d1c4e0182..0b33f8358 100644
--- a/mkrtos_user/user/drv/ATSURFF437/block/main.c
+++ b/mkrtos_user/user/drv/ATSURFF437/block/main.c
@@ -122,7 +122,7 @@ int main(int argc, char *argv[])
     blk_drv_init(&blk_drv);
     ret = rpc_meta_init(THREAD_MAIN, &hd);
     assert(ret >= 0);
-    ns_register(argv[1], hd, FILE_NODE);
+    ns_register(argv[1], hd, 0);
     meta_reg_svr_obj(&blk_drv.svr, BLK_DRV_PROT);
 
     while (1)
diff --git a/mkrtos_user/user/drv/ATSURFF437/display/main.c b/mkrtos_user/user/drv/ATSURFF437/display/main.c
index a584fe898..e26f4c6ef 100644
--- a/mkrtos_user/user/drv/ATSURFF437/display/main.c
+++ b/mkrtos_user/user/drv/ATSURFF437/display/main.c
@@ -45,7 +45,7 @@ int main(int argc, char *argv[])
     assert(ret >= 0);
     fs_svr_init();
     // mkdir("/dev", 0777);
-    ns_register("/display", hd, FILE_NODE);
+    ns_register("/display", hd, 0);
     while (1)
     {
         u_sleep_ms(0);
diff --git a/mkrtos_user/user/drv/ATSURFF437/eth/main.c b/mkrtos_user/user/drv/ATSURFF437/eth/main.c
index 43cd252cc..b1a883487 100644
--- a/mkrtos_user/user/drv/ATSURFF437/eth/main.c
+++ b/mkrtos_user/user/drv/ATSURFF437/eth/main.c
@@ -98,7 +98,7 @@ int main(int argc, char *argv[])
     assert(ret >= 0);
     // fs_svr_init();
     // mkdir("/dev", 0777);
-    ns_register("/eth", hd, FILE_NODE);
+    ns_register("/eth", hd, 0);
     meta_reg_svr_obj(&net_drv.svr, BLK_DRV_PROT);
     while (1)
     {
diff --git a/mkrtos_user/user/drv/ATSURFF437/i2c/main.c b/mkrtos_user/user/drv/ATSURFF437/i2c/main.c
index 443ccf740..407f98048 100644
--- a/mkrtos_user/user/drv/ATSURFF437/i2c/main.c
+++ b/mkrtos_user/user/drv/ATSURFF437/i2c/main.c
@@ -46,7 +46,7 @@ int main(int argc, char *argv[])
     assert(ret >= 0);
     fs_svr_init();
     // mkdir("/dev", 0777);
-    ns_register("/i2c2", hd, FILE_NODE);
+    ns_register("/i2c2", hd, 0);
     while (1)
     {
         u_sleep_ms(0);
diff --git a/mkrtos_user/user/drv/ATSURFF437/pca9555/main.c b/mkrtos_user/user/drv/ATSURFF437/pca9555/main.c
index 1d8575e05..3902c8e09 100644
--- a/mkrtos_user/user/drv/ATSURFF437/pca9555/main.c
+++ b/mkrtos_user/user/drv/ATSURFF437/pca9555/main.c
@@ -46,7 +46,7 @@ int main(int argc, char *argv[])
     assert(ret >= 0);
     fs_svr_init();
     // mkdir("/dev", 0777);
-    ns_register("/pca9555", hd, FILE_NODE);
+    ns_register("/pca9555", hd, 0);
     while (1)
     {
         u_sleep_ms(0);
diff --git a/mkrtos_user/user/drv/ATSURFF437/pin/main.c b/mkrtos_user/user/drv/ATSURFF437/pin/main.c
index 4c1249288..a06652118 100644
--- a/mkrtos_user/user/drv/ATSURFF437/pin/main.c
+++ b/mkrtos_user/user/drv/ATSURFF437/pin/main.c
@@ -47,7 +47,7 @@ int main(int argc, char *argv[])
     assert(ret >= 0);
     fs_svr_init();
     // mkdir("/dev", 0777);
-    ns_register("/pin", hd, FILE_NODE);
+    ns_register("/pin", hd, 0);
     while (1)
     {
         u_sleep_ms(0);
diff --git a/mkrtos_user/user/drv/ATSURFF437/snd/main.c b/mkrtos_user/user/drv/ATSURFF437/snd/main.c
index c30a66deb..ae49a52ec 100644
--- a/mkrtos_user/user/drv/ATSURFF437/snd/main.c
+++ b/mkrtos_user/user/drv/ATSURFF437/snd/main.c
@@ -89,7 +89,7 @@ int main(int argc, char *argv[])
     blk_drv_init(&snd_drv);
     ret = rpc_meta_init(THREAD_MAIN, &hd);
     assert(ret >= 0);
-    ns_register("/snd", hd, FILE_NODE);
+    ns_register("/snd", hd, 0);
     meta_reg_svr_obj(&snd_drv.svr, BLK_DRV_PROT);
     while (1)
     {
diff --git a/mkrtos_user/user/drv/STM32F205/block/main.c b/mkrtos_user/user/drv/STM32F205/block/main.c
index 37a247b0e..5aca1b251 100644
--- a/mkrtos_user/user/drv/STM32F205/block/main.c
+++ b/mkrtos_user/user/drv/STM32F205/block/main.c
@@ -122,7 +122,7 @@ int main(int argc, char *argv[])
     blk_drv_init(&blk_drv);
     ret = rpc_meta_init(THREAD_MAIN, &hd);
     assert(ret >= 0);
-    ns_register(argv[1], hd, FILE_NODE);
+    ns_register(argv[1], hd, 0);
     meta_reg_svr_obj(&blk_drv.svr, BLK_DRV_PROT);
 
     while (1)
diff --git a/mkrtos_user/user/drv/common/ram_block/main.c b/mkrtos_user/user/drv/common/ram_block/main.c
index fbe100365..f34203686 100644
--- a/mkrtos_user/user/drv/common/ram_block/main.c
+++ b/mkrtos_user/user/drv/common/ram_block/main.c
@@ -16,6 +16,7 @@
 #include <sys/mman.h>
 #include <stdlib.h>
 #include <getopt.h>
+#include <string.h>
 #include "u_hd_man.h"
 #include "u_vmam.h"
 #define STACK_COM_ITME_SIZE (1024 + 512)
@@ -34,7 +35,7 @@ static void fast_ipc_init(void)
 static blk_drv_t blk_drv;
 static uint8_t *blk_data;
 static int blk_nr;
-static int blk_size;
+static size_t blk_size;
 
 int blk_drv_write(obj_handler_t obj, int len, int inx)
 {
@@ -98,7 +99,7 @@ int blk_drv_info(blk_drv_info_t *info)
 {
     info->blk_nr = blk_nr;
     info->blk_size = blk_size;
-    info->blk_start_addr = blk_data;
+    info->blk_start_addr = (umword_t)blk_data;
     return 0;
 }
 
@@ -153,7 +154,7 @@ int main(int argc, char *argv[])
     blk_drv_init(&blk_drv);
     ret = rpc_meta_init(THREAD_MAIN, &hd);
     assert(ret >= 0);
-    ns_register(dev_path, hd, FILE_NODE);
+    ns_register(dev_path, hd, 0);
     meta_reg_svr_obj(&blk_drv.svr, BLK_DRV_PROT);
 
     while (1)