feat: fs增加注册接口

方案描述:
增加注册机制, 并增加重复注册判断

BREAKING CHANGE:
fs增加注册接口
新增API:
int LOS_FsRegister(const char *fsType, const struct MountOps *fsMops,
                   const struct FileOps *fsFops, const struct FsManagement *fsMgt);

fix #I611L2
Signed-off-by: wangchen <wangchen240@huawei.com>
https://gitee.com/openharmony/kernel_liteos_m/issues/I611L2

components/fs/vfs/los_fs.h

@@ -46,6 +46,7 @@
 #include "sys/uio.h"
 #include "unistd.h"
 #include <stdarg.h>
+#include "vfs_maps.h"
 
 #ifdef __cplusplus
 #if __cplusplus
@@ -152,6 +153,28 @@ int LOS_DiskPartition(const char *dev, const char *fsType, int *lengthArray, int
  */
 int LOS_PartitionFormat(const char *partName, char *fsType, void *data);
 
+/*
+ * @brief new file system callbacks register.
+ * These callback functions are the adaptation layer implemented by the developer,
+ * used to interconnect the vfs with the new file system.
+ *
+ * LOS_FsRegister must be called after kernel initialization is complete.
+ *
+ * @param fsType file system type, don't register the same type fs more than once.
+ * @param fsMops mount operation of the fs.
+ * @param fsFops file operation of the fs.
+ * @param fsMgt management operation of the fs.
+ *
+ * @return Return LOS_OK if success.
+ *         Return LOS_NOK if error.
+ *         errno EINVAL: input errors, such as null pointers.
+ *         errno ENOMEM: memory may malloc failed.
+ *
+ */
+int LOS_FsRegister(const char *fsType, const struct MountOps *fsMops,
+                   const struct FileOps *fsFops, const struct FsManagement *fsMgt);
+
+
 #ifdef __cplusplus
 #if __cplusplus
 extern "C" {

components/fs/vfs/vfs_maps.c

@@ -55,17 +55,19 @@ struct FsMap *VfsFsMapGet(const char *fsType)
     return NULL;
 }
 
-int OsFsRegister(const char *fsType, struct MountOps *fsMops,
-                 struct FileOps *fsFops, struct FsManagement *fsMgt)
+int OsFsRegister(const char *fsType, const struct MountOps *fsMops,
+                 const struct FileOps *fsFops, const struct FsManagement *fsMgt)
 {
     size_t len;
     if ((fsMops == NULL) || (fsFops == NULL)) {
+        VFS_ERRNO_SET(EINVAL);
         return (int)LOS_NOK;
     }
 
     struct FsMap *newfs = (struct FsMap *)LOSCFG_FS_MALLOC_HOOK(sizeof(struct FsMap));
     if (newfs == NULL) {
         PRINT_ERR("Fs register malloc failed, fsType %s.\n", fsType);
+        VFS_ERRNO_SET(ENOMEM);
         return (int)LOS_NOK;
     }
     (void)memset_s(newfs, sizeof(struct FsMap), 0, sizeof(struct FsMap));
@@ -74,6 +76,7 @@ int OsFsRegister(const char *fsType, struct MountOps *fsMops,
     newfs->fsType = LOSCFG_FS_MALLOC_HOOK(len);
     if (newfs->fsType == NULL) {
         LOSCFG_FS_FREE_HOOK(newfs);
+        VFS_ERRNO_SET(ENOMEM);
         return (int)LOS_NOK;
     }
     (void)strcpy_s((char *)newfs->fsType, len, fsType);
@@ -90,3 +93,15 @@ int OsFsRegister(const char *fsType, struct MountOps *fsMops,
     VfsUnlock();
     return LOS_OK;
 }
+
+int LOS_FsRegister(const char *fsType, const struct MountOps *fsMops,
+                   const struct FileOps *fsFops, const struct FsManagement *fsMgt)
+{
+    if (VfsFsMapGet(fsType) != NULL) {
+        PRINT_ERR("fsType has been registered or fsType error\n");
+        VFS_ERRNO_SET(EINVAL);
+        return (int)LOS_NOK;
+    }
+
+    return OsFsRegister(fsType, fsMops, fsFops, fsMgt);
+}

components/fs/vfs/vfs_maps.h

@@ -56,8 +56,8 @@ struct FsMap {
     struct FsMap *next;
 };
 
-int OsFsRegister(const char *fsType, struct MountOps *fsMops,
-                 struct FileOps *fsFops, struct FsManagement *fsMgt);
+int OsFsRegister(const char *fsType, const struct MountOps *fsMops,
+                 const struct FileOps *fsFops, const struct FsManagement *fsMgt);
 struct FsMap *VfsFsMapGet(const char *fsType);
 
 #ifdef __cplusplus

testsuites/unittest/posix/BUILD.gn

@@ -39,7 +39,6 @@ static_library("posix_test") {
     "src/ctype/tolower_test.c",
     "src/ctype/toupper_test.c",
     "src/errno/strerror_test.c",
-    "src/fs/posix_fs_func_test.c",
     "src/math/math_func_test.c",
     "src/mqueue/mqueue_func_test.c",
     "src/posix_test.c",
@@ -65,7 +64,9 @@ static_library("posix_test") {
     "//test/xts/tools/hctest/include",
     "src",
   ]
-
+  if (defined(LOSCFG_SUPPORT_FATFS) || defined(LOSCFG_SUPPORT_LITTLEFS)) {
+    sources += [ "src/fs/posix_fs_func_test.c" ]
+  }
   if (!defined(LOSCFG_COMPILER_ICCARM)) {
     cflags = [ "-Wno-error" ]
   } else {