first commit for chrg

2025-08-16 22:58:22 +08:00
commit 52a3ed5862
2306 changed files with 1021208 additions and 0 deletions
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+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-05-05     Bernard      Implement dentry in dfs v2.0
+ */
+
+#ifndef __DFS_DENTRY_H__
+#define __DFS_DENTRY_H__
+
+#include "dfs_file.h"
+#include "dfs_fs.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+struct dfs_mnt;
+struct dfs_vnode;
+
+struct dfs_dentry
+{
+    rt_list_t hashlist;
+
+    uint32_t flags;
+
+#define DENTRY_IS_MOUNTED   0x1 /* dentry is mounted */
+#define DENTRY_IS_ALLOCED   0x2 /* dentry is allocated */
+#define DENTRY_IS_ADDHASH   0x4 /* dentry was added into hash table */
+#define DENTRY_IS_OPENED    0x8 /* dentry was opened. */
+    char *pathname;             /* the pathname under mounted file sytem */
+
+    struct dfs_vnode *vnode;    /* the vnode of this dentry */
+    struct dfs_mnt *mnt;        /* which mounted file system does this dentry belong to */
+
+    rt_atomic_t ref_count;    /* the reference count */
+};
+
+struct dfs_dentry *dfs_dentry_create(struct dfs_mnt *mnt, char *fullpath);
+struct dfs_dentry *dfs_dentry_create_rela(struct dfs_mnt *mnt, char *rela_path);
+struct dfs_dentry *dfs_dentry_unref(struct dfs_dentry *dentry);
+struct dfs_dentry *dfs_dentry_ref(struct dfs_dentry *dentry);
+void dfs_dentry_insert(struct dfs_dentry *dentry);
+struct dfs_dentry *dfs_dentry_lookup(struct dfs_mnt *mnt, const char *path, uint32_t flags);
+
+/* get full path of a dentry */
+char* dfs_dentry_full_path(struct dfs_dentry* dentry);
+
+/* get pathname (with mnt path) of a dentry */
+char* dfs_dentry_pathname(struct dfs_dentry* dentry);
+
+/* get full path crc32 */
+uint32_t dfs_dentry_full_path_crc32(struct dfs_dentry* dentry);
+
+int dfs_dentry_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__DFS_DENTRY_H__*/