feat: implement fsync(2) and hard link support [link(2)]

[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 37af44e2777fcf9bf7c3fb5139ba749b26aa192f..e3abe4b4c2a682577effbfd965c06ea15f318a91 100644 (file)
--- a/lunaix-os/kernel/fs/twifs.c
+++ b/lunaix-os/kernel/fs/twifs.c
@@ -40,6 +40,9 @@ __twifs_mount(struct v_superblock* vsb, struct v_dnode* mount_point);
 int
 __twifs_mkdir(struct v_inode* inode, struct v_dnode* dnode);
 
+int
+__twifs_rmstuff(struct v_inode* inode);
+
 void
 twifs_init()
 {
@@ -48,6 +51,7 @@ twifs_init()
     struct filesystem* twifs = vzalloc(sizeof(struct filesystem));
     twifs->fs_name = HSTR("twifs", 5);
     twifs->mount = __twifs_mount;
+    twifs->types = FSTYPE_ROFS;
 
     fsm_register(twifs);
 
@@ -71,21 +75,16 @@ __twifs_new_node(struct twifs_node* parent, const char* name, int name_len)
     return node;
 }
 
-void
+int
 twifs_rm_node(struct twifs_node* node)
 {
-    // TODO recursivly delete any sub-directories.
-    if ((node->itype & VFS_INODE_TYPE_DIR)) {
-        struct twifs_node* dir = __twifs_get_node(node, &vfs_dot);
-        struct twifs_node* dir2 = __twifs_get_node(node, &vfs_ddot);
-        vfs_i_free(dir->inode);
-        vfs_i_free(dir2->inode);
-        cake_release(twi_pile, dir);
-        cake_release(twi_pile, dir2);
+    if ((node->itype & VFS_INODE_TYPE_DIR) && !llist_empty(&node->children)) {
+        return ENOTEMPTY;
     }
     llist_delete(&node->siblings);
     vfs_i_free(node->inode);
     cake_release(twi_pile, node);
+    return 0;
 }
 
 struct twifs_node*
@@ -112,18 +111,10 @@ twifs_dir_node(struct twifs_node* parent, const char* name, int name_len)
 
     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);
-    struct twifs_node* ddot = __twifs_new_node(twi_node, "..", 2);
-
-    dot->itype = VFS_INODE_TYPE_DIR;
-    ddot->itype = VFS_INODE_TYPE_DIR;
-
+    twi_node->fops.readdir = __twifs_iterate_dir;
     twi_node->inode = twi_inode;
-    dot->inode = twi_inode;
-    ddot->inode = parent ? parent->inode : twi_inode;
 
     return twi_node;
 }
@@ -152,13 +143,6 @@ 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;
 }
 
@@ -172,9 +156,11 @@ __twifs_create_inode(struct twifs_node* twi_node)
                                .lb_usage = 0,
                                .data = twi_node,
                                .mtime = 0,
-                               .ref_count = 0 };
+                               .open_count = 0 };
     inode->ops.dir_lookup = __twifs_dirlookup;
     inode->ops.mkdir = __twifs_mkdir;
+    inode->ops.unlink = __twifs_rmstuff;
+    inode->ops.rmdir = __twifs_rmstuff;
     inode->ops.open = __twifs_openfile;
 
     return inode;
@@ -196,6 +182,13 @@ __twifs_get_node(struct twifs_node* parent, struct hstr* name)
     return NULL;
 }
 
+int
+__twifs_rmstuff(struct v_inode* inode)
+{
+    struct twifs_node* twi_node = (struct twifs_node*)inode->data;
+    return twifs_rm_node(twi_node);
+}
+
 int
 __twifs_dirlookup(struct v_inode* inode, struct v_dnode* dnode)
 {