debug/error-gen: add the short write pseudo-error

Add a separate enum for pseudo-errors in the debug/error-gen
translator and include a short write error. The short write error
causes writev requests to return with some non-error value less
than the size of the write request.

BUG: 853690
Change-Id: I50b7d328386a8b78d03ce91b4c2ec83e0d32c9aa
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-on: http://review.gluster.org/4148
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/xlators/debug/error-gen/src/error-gen.h b/xlators/debug/error-gen/src/error-gen.h
index 9eaec804f..d92c23062 100644
--- a/xlators/debug/error-gen/src/error-gen.h
+++ b/xlators/debug/error-gen/src/error-gen.h
@@ -19,6 +19,18 @@
 
 #define GF_FAILURE_DEFAULT 10
 
+/*
+ * Pseudo-errors refer to errors beyond the scope of traditional <-1, op_errno>
+ * returns. This facilitates the ability to return unexpected, but not -1 values
+ * and/or to inject operations that lead to implicit error conditions. The range
+ * for pseudo errors resides at a high value to avoid conflicts with the errno
+ * range.
+ */
+enum GF_PSEUDO_ERRORS {
+	GF_ERROR_SHORT_WRITE = 1000,	/* short writev return value */
+	GF_ERROR_MAX
+};
+
 typedef struct {
         int enable[GF_FOP_MAXVALUE];
         int op_count;