Changeset 8a49fed in mainline for uspace/srv/fs/minixfs/mfs_ops.c

Timestamp:

2011-04-30T11:45:33Z (13 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

44c6091f

Parents:

2874547

Message:

Added implementation of mfs_truncate(), it does not prune indirect blocks yet.

File:

• uspace/srv/fs/minixfs/mfs_ops.c (modified) (1 diff)

uspace/srv/fs/minixfs/mfs_ops.c

@@ -791 +791 @@
 }
 
+void
+mfs_truncate(ipc_callid_t rid, ipc_call_t *request)
+{
+        devmap_handle_t handle = (devmap_handle_t) IPC_GET_ARG1(*request);
+        fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
+        aoff64_t size = (aoff64_t) MERGE_LOUP32(IPC_GET_ARG3(*request),
+                                                IPC_GET_ARG4(*request));
+        fs_node_t *fn;
+        int r;
+
+        mfsdebug("mfs_truncate()\n");
+
+        r = mfs_node_get(&fn, handle, index);
+        if (r != EOK) {
+                async_answer_0(rid, r);
+                return;
+        }
+
+        if (!fn) {
+                async_answer_0(rid, r);
+                return;
+        }
+
+        struct mfs_node *mnode = fn->data;
+        struct mfs_ino_info *ino_i = mnode->ino_i;
+
+        if (ino_i->i_size == size)
+                r = EOK;
+        else
+                r = inode_shrink(mnode, ino_i->i_size - size);
+
+        async_answer_0(rid, r);
+        mfs_node_put(fn);
+}
+
 int mfs_instance_get(devmap_handle_t handle, struct mfs_instance **instance)
 {