Changeset 23 for trunk/kernel/vfs/ramfs.c

Timestamp:

Jun 18, 2017, 10:06:41 PM (7 years ago)

Author:

alain

Message:

Introduce syscalls.

File:

• trunk/kernel/vfs/ramfs.c (copied) (copied from trunk/kernel/vfs/ramfs.c) (2 diffs)

trunk/kernel/vfs/ramfs.c

@@ -2 +2 @@
  * ramfs.c  RAMFS file system API implementation.
  *
- * Authors   Mohamed Lamine Karaoui (2015)
- *           Alain Greiner (2016)
+ * Authors   Mohamed Lamine Karaoui (2014,2015)
+ *           Alain Greiner (2016,2017)
  *
  * Copyright (c) UPMC Sorbonne Universites
@@ -32 +32 @@
 
 
-///////////////////////////////////////////////////////////////////////////////////////
-// RAMFS specific functions : these static functions cannot be called by the VFS 
-///////////////////////////////////////////////////////////////////////////////////////
 
 
 
 ///////////////////////////////////////////////////////////////////////////////////////
-// Generic API : the following functions are called by the VFS, 
-//               and must be defined by all supported file systems.
+//             The following functions are called by the VFS. 
 ///////////////////////////////////////////////////////////////////////////////////////
 
-////////////////////////////////////////////////////////////
-error_t ramfs_inode_create( struct vfs_inode_s * vfs_inode )
+//////////////////////////////////////////////
+error_t ramfs_mount( xptr_t   parent_inode_xp,
+                     char   * ramfs_root_name )
 {
-    printk("\n[PANIC] %s not fully implemented yet\n", __FUNCTION__ );
-    hal_core_sleep();
+    xptr_t        root_inode_xp;   // unused                      
+ 
+    // create VFS dentry and VFS inode for RAMFS root directory
+    return  vfs_add_child_in_parent( INODE_TYPE_DIR,
+                                     FS_TYPE_RAMFS,
+                                     parent_inode_xp,
+                                     ramfs_root_name,
+                                     &root_inode_xp );
+}
 
-    kmem_req_t      req;
-    ramfs_inode_t * ramfs_inode;
 
-    // allocate memory for ramfs inode
-        req.type    = KMEM_RAMFS_INODE;
-        req.size    = sizeof(ramfs_inode_t);
-    req.flags   = AF_KERNEL | AF_ZERO;
-        ramfs_inode = (ramfs_inode_t *)kmem_alloc( &req );
+////////////////////////////////////////////
+error_t ramfs_ctx_init( vfs_ctx_t * vfs_ctx,
+                        xptr_t      root_inode_xp )
 
-    if( ramfs_inode == NULL ) return ENOMEM;
+{
+    vfs_ctx->type    = FS_TYPE_RAMFS;
+    vfs_ctx->attr    = 0;                // not READ_ONLY / not SYNC
+    vfs_ctx->count   = 0;                // unused for RAMFS
+    vfs_ctx->blksize = 512;              // unused for RAMFS
+    vfs_ctx->root_xp = root_inode_xp;
+    vfs_ctx->extend  = NULL;             // unused for DEVFS
 
-    // initialise ramfs_inode TODO
+    spinlock_init( &vfs_ctx->lock );
 
-    // link vfs_inode to ramfs_inode
-    vfs_inode->extend = ramfs_inode;
+    bitmap_init( vfs_ctx->bitmap , CONFIG_VFS_MAX_INODES );
 
     return 0;
 }
 
-//////////////////////////////////////////////////////
-void ramfs_inode_destroy( struct vfs_inode_s * inode )
-{
-    assert( false , __FUNCTION__ , "not fully implemented yet" );
-}
-
-/////////////////////////////////////////////////
-error_t ramfs_write_page( struct page_s  * page )
-{
-    printk("\n[PANIC] %s not fully implemented yet\n", __FUNCTION__ );
-    hal_core_sleep();
-
-    return 0;
-}
-
-////////////////////////////////////////////////
-error_t ramfs_read_page( struct page_s  * page )
-{
-    printk("\n[PANIC] %s not fully implemented yet\n", __FUNCTION__ );
-    hal_core_sleep();
-
-    return 0;
-}
-