update readme

[lunaix-os.git] / lunaix-os / kernel / fs / twifs.c

diff --git a/lunaix-os/kernel/fs/twifs.c b/lunaix-os/kernel/fs/twifs.c
index a024c32bca407dfb4b7c1aefbe931c41aa2a955d..ad226ca8d74a2d0069808b7ffadd9a6bd342f11c 100644 (file)
--- a/lunaix-os/kernel/fs/twifs.c
+++ b/lunaix-os/kernel/fs/twifs.c
@@ -31,6 +31,9 @@ __twifs_get_node(struct twifs_node* parent, struct hstr* name);
 struct v_inode*
 __twifs_create_inode(struct twifs_node* twi_node);
 
+int
+__twifs_iterate_dir(struct v_file* file, struct dir_context* dctx);
+
 int
 __twifs_mount(struct v_superblock* vsb, struct v_dnode* mount_point);
 
@@ -56,18 +59,11 @@ twifs_init()
 struct twifs_node*
 __twifs_new_node(struct twifs_node* parent, const char* name, int name_len)
 {
-    struct hstr hname = HSTR(name, name_len);
-    hstr_rehash(&hname, HSTR_FULL_HASH);
-
-    struct twifs_node* node = __twifs_get_node(parent, &hname);
-    if (node) {
-        return node;
-    }
-
-    node = cake_grab(twi_pile);
+    struct twifs_node* node = cake_grab(twi_pile);
     memset(node, 0, sizeof(*node));
 
-    node->name = hname;
+    node->name = HSTR(name, name_len);
+    hstr_rehash(&node->name, HSTR_FULL_HASH);
     llist_init_head(&node->children);
 
     if (parent) {
@@ -92,8 +88,16 @@ twifs_file_node(struct twifs_node* parent, const char* name, int name_len)
 struct twifs_node*
 twifs_dir_node(struct twifs_node* parent, const char* name, int name_len)
 {
+    struct hstr hname = HSTR(name, name_len);
+    hstr_rehash(&hname, HSTR_FULL_HASH);
+    struct twifs_node* node = __twifs_get_node(parent, &hname);
+    if (node) {
+        return node;
+    }
+
     struct twifs_node* twi_node = __twifs_new_node(parent, name, name_len);
     twi_node->itype = VFS_INODE_TYPE_DIR;
+    twi_node->fops.readdir = __twifs_iterate_dir;
 
     struct v_inode* twi_inode = __twifs_create_inode(twi_node);
     struct twifs_node* dot = __twifs_new_node(twi_node, ".", 1);
@@ -104,7 +108,7 @@ twifs_dir_node(struct twifs_node* parent, const char* name, int name_len)
 
     twi_node->inode = twi_inode;
     dot->inode = twi_inode;
-    ddot->inode = parent->inode;
+    ddot->inode = parent ? parent->inode : twi_inode;
 
     return twi_node;
 }
@@ -119,6 +123,13 @@ int
 __twifs_mount(struct v_superblock* vsb, struct v_dnode* mount_point)
 {
     mount_point->inode = fs_root->inode;
+    // FIXME: try to mitigate this special case or pull it up to higher level of
+    // abstraction
+    if (mount_point->parent && mount_point->parent->inode) {
+        struct hstr ddot_name = HSTR("..", 2);
+        struct twifs_node* root_ddot = __twifs_get_node(fs_root, &ddot_name);
+        root_ddot->inode = mount_point->parent->inode;
+    }
     return 0;
 }
 
@@ -181,11 +192,11 @@ __twifs_iterate_dir(struct v_file* file, struct dir_context* dctx)
             dctx->index = counter;
             dctx->read_complete_callback(
               dctx, pos->name.value, pos->name.len, pos->itype);
-            return 1;
+            return 0;
         }
     }
 
-    return 0;
+    return 1;
 }
 
 int
@@ -193,6 +204,7 @@ __twifs_openfile(struct v_inode* inode, struct v_file* file)
 {
     struct twifs_node* twi_node = (struct twifs_node*)inode->data;
     if (twi_node) {
+        file->inode = twi_node->inode;
         file->ops = twi_node->fops;
         return 0;
     }