Merge branch 'devel' of palacios@newskysaw.cs.northwestern.edu:/home/palacios/palacio...

[palacios.git] / palacios / src / devices / filedisk.c

diff --git a/palacios/src/devices/filedisk.c b/palacios/src/devices/filedisk.c
index 278b234..ebaaaad 100644 (file)
--- a/palacios/src/devices/filedisk.c
+++ b/palacios/src/devices/filedisk.c
@@ -124,13 +124,20 @@ static struct v3_device_ops dev_ops = {
 
 
 
-static int disk_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
+static int disk_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
     struct disk_state * disk = NULL;
     char * path = v3_cfg_val(cfg, "path");
+
     char * dev_id = v3_cfg_val(cfg, "ID");
-    char * filename = v3_cfg_val(cfg, "file");
 
 
+
+    char * writable = v3_cfg_val(cfg, "writable");
+    char * readable = v3_cfg_val(cfg, "readable");
+    
+    int allowWrite = ( writable && writable[0] == '1' );
+    int allowRead = ( !readable || readable[0] == '1' );
+
     v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
 
     disk = (struct disk_state *)V3_Malloc(sizeof(struct disk_state));
@@ -139,28 +146,45 @@ static int disk_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
 
     if (!path) {
 
+
        PrintError("Missing path (%s) for %s\n", path, dev_id);
        return -1;
+
+    }
+    
+    if ( allowRead && allowWrite ) {
+       disk->fd = V3_FileOpen(path, FILE_OPEN_MODE_READ | FILE_OPEN_MODE_WRITE );
+    } else if ( allowRead && !allowWrite ) {
+       disk->fd = V3_FileOpen(path, FILE_OPEN_MODE_READ );
+    } else if ( !allowRead && allowWrite ) {
+       disk->fd = V3_FileOpen(path, FILE_OPEN_MODE_WRITE );
+    } else {
+       PrintError("Error on %s: No file mode specified\n", dev_id );
+       return -1;
+
     }
     
-    disk->fd = V3_FileOpen(path, 0);
     disk->capacity = V3_FileSize(disk->fd);
 
     PrintDebug("Registering FILEDISK %s (path=%s, fd=%lu, size=%lu)\n",
-              name, path, file->fd, file->capacity);
+              dev_id, path, file->fd, file->capacity);
 
     struct vm_device * dev = v3_allocate_device(dev_id, &dev_ops, disk);
 
     if (v3_attach_device(vm, dev) == -1) {
+
        PrintError("Could not attach device %s\n", dev_id);
        return -1;
+
     }
 
     if (v3_dev_connect_blk(vm, v3_cfg_val(frontend_cfg, "tag"), 
                           &blk_ops, frontend_cfg, disk) == -1) {
+
        PrintError("Could not connect %s to frontend %s\n", 
                   dev_id, v3_cfg_val(frontend_cfg, "tag"));
        return -1;
+
     }