Changes in uspace/srv/vfs/vfs_ops.c [27b76ca:5bb9907] in mainline

File:

• uspace/srv/vfs/vfs_ops.c (modified) (2 diffs)

uspace/srv/vfs/vfs_ops.c

@@ -618 +618 @@
 }
 
+void vfs_open_node(ipc_callid_t rid, ipc_call_t *request)
+{
+        // FIXME: check for sanity of the supplied fs, dev and index
+        
+        /*
+         * The interface is open_node(fs, dev, index, oflag).
+         */
+        vfs_lookup_res_t lr;
+        
+        lr.triplet.fs_handle = IPC_GET_ARG1(*request);
+        lr.triplet.devmap_handle = IPC_GET_ARG2(*request);
+        lr.triplet.index = IPC_GET_ARG3(*request);
+        int oflag = IPC_GET_ARG4(*request);
+        
+        fibril_rwlock_read_lock(&namespace_rwlock);
+        
+        int rc = vfs_open_node_internal(&lr);
+        if (rc != EOK) {
+                fibril_rwlock_read_unlock(&namespace_rwlock);
+                async_answer_0(rid, rc);
+                return;
+        }
+        
+        vfs_node_t *node = vfs_node_get(&lr);
+        fibril_rwlock_read_unlock(&namespace_rwlock);
+        
+        /* Truncate the file if requested and if necessary. */
+        if (oflag & O_TRUNC) {
+                fibril_rwlock_write_lock(&node->contents_rwlock);
+                if (node->size) {
+                        rc = vfs_truncate_internal(node->fs_handle,
+                            node->devmap_handle, node->index, 0);
+                        if (rc) {
+                                fibril_rwlock_write_unlock(&node->contents_rwlock);
+                                vfs_node_put(node);
+                                async_answer_0(rid, rc);
+                                return;
+                        }
+                        node->size = 0;
+                }
+                fibril_rwlock_write_unlock(&node->contents_rwlock);
+        }
+        
+        /*
+         * Get ourselves a file descriptor and the corresponding vfs_file_t
+         * structure.
+         */
+        int fd = vfs_fd_alloc((oflag & O_DESC) != 0);
+        if (fd < 0) {
+                vfs_node_put(node);
+                async_answer_0(rid, fd);
+                return;
+        }
+        vfs_file_t *file = vfs_file_get(fd);
+        file->node = node;
+        if (oflag & O_APPEND)
+                file->append = true;
+        
+        /*
+         * The following increase in reference count is for the fact that the
+         * file is being opened and that a file structure is pointing to it.
+         * It is necessary so that the file will not disappear when
+         * vfs_node_put() is called. The reference will be dropped by the
+         * respective VFS_IN_CLOSE.
+         */
+        vfs_node_addref(node);
+        vfs_node_put(node);
+        vfs_file_put(file);
+        
+        /* Success! Return the new file descriptor to the client. */
+        async_answer_1(rid, EOK, fd);
+}
+
 void vfs_sync(ipc_callid_t rid, ipc_call_t *request)
 {
@@ -1276 +1349 @@
 }
 
-void vfs_wait_handle(ipc_callid_t rid, ipc_call_t *request)
-{
-        int fd = vfs_wait_handle_internal();
-        async_answer_1(rid, EOK, fd);
-}
-
 /**
  * @}