debug/trace: save the recent fops received in the event-history

* Make use of event-history in debug/trace xlator to dump the recent fops,
when statedump is given. trace xlator saves the fop it received along
with the time in the event-history and upon statedump signal, dumps its
history. The size of the event-history can be given as a xlator option.

* Make changes in trace to take logging into log-file or logging to
history as an option. By default both are off.

Change-Id: I12baee5805c6efb55735cead4e2093fb94d7a6a0
BUG: 797171
Signed-off-by: Raghavendra Bhat <raghavendra@redhat.com>
Reviewed-on: http://review.gluster.org/4088
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.h b/xlators/mgmt/glusterd/src/glusterd-volgen.h
index 39e19e5a883..6df88f75f67 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.h
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.h
@@ -55,6 +55,27 @@ typedef enum gd_volopt_flags_ {
         OPT_FLAG_FORCE = 1,
 } gd_volopt_flags_t;
 
+typedef enum {
+        GF_XLATOR_POSIX = 0,
+        GF_XLATOR_ACL,
+        GF_XLATOR_LOCKS,
+        GF_XLATOR_IOT,
+        GF_XLATOR_INDEX,
+        GF_XLATOR_MARKER,
+        GF_XLATOR_IO_STATS,
+        GF_XLATOR_NONE,
+} glusterd_server_xlator_t;
+
+/* As of now debug xlators can be loaded only below fuse in the client
+ * graph via cli. More xlators can be added below when the cli option
+ * for adding debug xlators anywhere in the client graph has to be made
+ * available.
+ */
+typedef enum {
+        GF_CLNT_XLATOR_FUSE = 0,
+        GF_CLNT_XLATOR_NONE,
+} glusterd_client_xlator_t;
+
 typedef enum  { DOC, NO_DOC, GLOBAL_DOC, GLOBAL_NO_DOC } option_type_t;
 
 struct volopt_map_entry {