Changeset a92da0a in mainline for uspace/srv/vfs/vfs_read.c

Timestamp:

2007-12-23T21:46:52Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

7dab6b8

Parents:

a55d5f9f

Message:

Reimplement VFS_READ using IPC_M_DATA_READ.

File:

• uspace/srv/vfs/vfs_read.c (modified) (3 diffs)

uspace/srv/vfs/vfs_read.c

@@ -54 +54 @@
          */
 
-        /*
-         * Because we don't support the receive analogy of IPC_M_DATA_SEND,
-         * VFS_READ is emulutating its behavior via sharing an address space
-         * area.
-         */
-
         int fd = IPC_GET_ARG1(*request);
-        size_t size = IPC_GET_ARG2(*request);
 
         /*
@@ -73 +66 @@
 
         /*
-         * Now we need to receive a call with client's address space area.
+         * Now we need to receive a call with client's IPC_M_DATA_READ request.
          */
         ipc_callid_t callid;
-        ipc_call_t call;
-        callid = async_get_call(&call);
-        if (IPC_GET_METHOD(call) != IPC_M_AS_AREA_SEND) {
+        if (!ipc_data_read_receive(&callid, NULL)) {
                 ipc_answer_0(callid, EINVAL);
                 ipc_answer_0(rid, EINVAL);
@@ -91 +82 @@
         aid_t msg;
         ipc_call_t answer;
-        msg = async_send_4(fs_phone, VFS_READ, file->node->dev_handle,
-            file->node->index, file->pos, size, &answer);
+        msg = async_send_3(fs_phone, VFS_READ, file->node->dev_handle,
+            file->node->index, file->pos, &answer);
         
         /*
-         * Forward the address space area offer to the destination FS server.
-         * The call will be routed as if sent by ourselves.
+         * Forward the IPC_M_DATA_READ request to the destination FS server.
+         * The call will be routed as if sent by ourselves. Note that call
+         * arguments are immutable in this case so we don't have to bother.
          */
-        ipc_forward_fast(callid, fs_phone, IPC_GET_METHOD(call),
-            IPC_GET_ARG1(call), 0, IPC_FF_ROUTE_FROM_ME);
+        ipc_forward_fast(callid, fs_phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);
 
         vfs_release_phone(fs_phone);