runqemu: Ensure we cleanup snapshot files after image run

We need to cleanup snapshot files if we make a copy of them to ensure
the tmpfs doesn't run out of space. There is already NFS code needing
this so make it a generic code path.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/scripts/runqemu b/scripts/runqemu
index ba0b701aff36ca7fb7d480bbdddc3d18a6960f5f..edd17d09c4ac276886831ea3107a7e21330dea42 100755 (executable)
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -145,7 +145,6 @@ class BaseConfig(object):
         self.qemu_opt = ''
         self.qemu_opt_script = ''
         self.qemuparams = ''
-        self.clean_nfs_dir = False
         self.nfs_server = ''
         self.rootfs = ''
         # File name(s) of a OVMF firmware file or variable store,
@@ -210,6 +209,8 @@ class BaseConfig(object):
         self.qemupid = None
         # avoid cleanup twice
         self.cleaned = False
+        # Files to cleanup after run
+        self.cleanup_files = []
 
     def acquire_taplock(self, error=True):
         logger.debug("Acquiring lockfile %s..." % self.taplock)
@@ -1020,8 +1021,9 @@ class BaseConfig(object):
                 logger.info('Running %s...' % str(cmd))
                 if subprocess.call(cmd) != 0:
                     raise RunQemuError('Failed to run %s' % cmd)
-                self.clean_nfs_dir = True
                 self.rootfs = dest
+                self.cleanup_files.append(self.rootfs)
+                self.cleanup_files.append('%s.pseudo_state' % self.rootfs)
 
         # Start the userspace NFS server
         cmd = ('runqemu-export-rootfs', 'start', self.rootfs)
@@ -1204,6 +1206,7 @@ class BaseConfig(object):
             self.rootfs = newrootfs
             # Don't need a second copy now!
             self.snapshot = False
+            self.cleanup_files.append(newrootfs)
 
         qb_rootfs_opt = self.get('QB_ROOTFS_OPT')
         if qb_rootfs_opt:
@@ -1476,10 +1479,13 @@ class BaseConfig(object):
         if self.saved_stty:
             subprocess.check_call(("stty", self.saved_stty))
 
-        if self.clean_nfs_dir:
-            logger.info('Removing %s' % self.rootfs)
-            shutil.rmtree(self.rootfs)
-            shutil.rmtree('%s.pseudo_state' % self.rootfs)
+        if self.cleanup_files:
+            for ent in self.cleanup_files:
+                logger.info('Removing %s' % ent)
+                if os.path.isfile(ent):
+                    os.remove(ent)
+                else:
+                    shutil.rmtree(ent)
 
         self.cleaned = True