[RFC v2 6/9] scripts: add coccinelle script to use auto propagated errp

[Vladimir Sementsov-Ogievskiy]

Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
---
 scripts/coccinelle/auto-propagated-errp.cocci | 82 +++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 scripts/coccinelle/auto-propagated-errp.cocci

diff --git a/scripts/coccinelle/auto-propagated-errp.cocci 
b/scripts/coccinelle/auto-propagated-errp.cocci
new file mode 100644
index 0000000000..1a3f006f0b
--- /dev/null
+++ b/scripts/coccinelle/auto-propagated-errp.cocci
@@ -0,0 +1,82 @@
+@@
+identifier fn;
+identifier local_err;
+@@
+
+ fn(..., Error **errp)
+ {
++    ERRP_FUNCTION_BEGIN();
+ }
+
+@rule1@
+identifier fn;
+identifier local_err;
+@@
+
+ fn(..., Error **errp)
+ {
+     <...
+-    Error *local_err = NULL;
+     ...>
+ }
+
+@@
+identifier rule1.fn;
+identifier rule1.local_err;
+identifier out;
+@@
+
+ fn(...)
+ {
+     <...
+-    goto out;
++    return;
+     ...>
+- out:
+-    error_propagate(errp, local_err);
+ }
+
+@@
+identifier rule1.fn;
+identifier rule1.local_err;
+@@
+
+ fn(...)
+ {
+     <...
+(
+-    error_free(local_err);
+-    local_err = NULL;
++    error_free_errp(errp);
+|
+-    error_free(local_err);
++    error_free_errp(errp);
+|
+-    error_report_err(local_err);
++    error_report_errp(errp);
+|
+-    warn_report_err(local_err);
++    warn_report_errp(errp);
+|
+-    error_propagate(errp, local_err);
+)
+     ...>
+ }
+
+@@
+identifier rule1.fn;
+identifier rule1.local_err;
+@@
+
+ fn(...)
+ {
+     <...
+(
+-    &local_err
++    errp
+|
+-    local_err
++    *errp
+)
+     ...>
+ }
-- 
2.21.0