Don't truncate read requests based on v_size; v_size can be stale in the

case of directories extended by subfilesystem. Rely on subfilesystem to
do read size truncating and return actual i/o size. This fixes bug 81 in
gforge, and unbreaks test 23.

diff --git a/servers/vfs/read.c b/servers/vfs/read.c
index d3660d6cf36513f9c8dd31fd5130c7b7c9ae61ff..8c874d0b181bd3bce2e46986800d010d58e848ff 100644 (file)
--- a/servers/vfs/read.c
+++ b/servers/vfs/read.c
@@ -150,7 +150,9 @@ int rw_flag;                        /* READING or WRITING */
       /* Fill in request structure */
       num_of_bytes = m_in.nbytes;
 
-      /* Truncate read request at size (mustn't do this for special files). */
+#if 0  /* Don't truncate read request at size. The filesystem process will
+       * do this itself.
+       */
       if((rw_flag == READING) &&
        cmp64ul(add64ul(position, num_of_bytes), vp->v_size) > 0) {
                /* Position always should fit in an off_t (LONG_MAX). */
@@ -162,6 +164,7 @@ int rw_flag;                        /* READING or WRITING */
                num_of_bytes = vp->v_size - pos32;
                assert(num_of_bytes >= 0);
       }
+#endif
 
       /* Issue request */
       r = req_readwrite(vp->v_fs_e, vp->v_inode_nr, vp->v_index, position,