glusterd/quota: upgrade quota.conf file during an upgrade

Problem
=======
When quota is enabled on 3.6, it will have quota conf version in quota.conf
as v1.1. This node gets upgraded to 3.7 but it will still have quota conf
version as v1.1 until a quota enable/disable/set limit is initiated. When
this is not initiated and when this node tries to peer probe a node which
is a fresh install of 3.7 (which will have quota conf version as v1.2), then this
will result in "Peer rejected" state. This patch fixes the issue.

Solution
========
When an upgrade happens from 3.6 to 3.7, quota.conf file needs
to be modified as well. With 3.6, in quota.conf the version will be
v1.1 and it needs to be changed to v1.2 from 3.7. This is because in
3.7, inode quota feature is introduced. So when an op-version bumpup
happens quota.conf needs to be upgraded with quota conf version v1.2
and all the 16 byte uuid needs to be changed to 17 bytes uuid as well.

Previously, when the cluster version is upgraded to 3.7, the quota.conf
got upgraded as well. But, the upgradation was done only when quota
enable/disable/set limit is done. With this patch, the upgradation is done
during a cluster op version bump up as well.

Change-Id: Idb5ba29d3e1ea0e45c85d87c952c75da9e0f99f0
BUG: 1371539
Signed-off-by: Manikandan Selvaganesh <mselvaga@redhat.com>
Reviewed-on: http://review.gluster.org/15352
Tested-by: Atin Mukherjee <amukherj@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>

1 files changed, 9 insertions, 4 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-quota.c b/xlators/mgmt/glusterd/src/glusterd-quota.c
index d5111fef65..c1c95ae517 100644
--- a/xlators/mgmt/glusterd/src/glusterd-quota.c
+++ b/xlators/mgmt/glusterd/src/glusterd-quota.c
@@ -23,6 +23,7 @@
 #include "byte-order.h"
 #include "compat-errno.h"
 #include "quota-common-utils.h"
+#include "glusterd-quota.h"
 
 #include <sys/wait.h>
 #include <dlfcn.h>
@@ -55,12 +56,10 @@ const char *gd_quota_op_list[GF_QUOTA_OPTION_TYPE_MAX + 1] = {
         [GF_QUOTA_OPTION_TYPE_LIST_OBJECTS]       = "list-objects",
         [GF_QUOTA_OPTION_TYPE_REMOVE_OBJECTS]     = "remove-objects",
         [GF_QUOTA_OPTION_TYPE_ENABLE_OBJECTS]     = "enable-objects",
+        [GF_QUOTA_OPTION_TYPE_UPGRADE]            = "upgrade",
         [GF_QUOTA_OPTION_TYPE_MAX]                = NULL
 };
 
-int
-glusterd_store_quota_config (glusterd_volinfo_t *volinfo, char *path,
-                             char *gfid_str, int opcode, char **op_errstr);
 
 gf_boolean_t
 glusterd_is_quota_supported (int32_t type, char **op_errstr)
@@ -1098,9 +1097,15 @@ glusterd_store_quota_config (glusterd_volinfo_t *volinfo, char *path,
         if (ret)
                 goto out;
 
+
         /* Just create empty quota.conf file if create */
         if (GF_QUOTA_OPTION_TYPE_ENABLE == opcode ||
-            GF_QUOTA_OPTION_TYPE_ENABLE_OBJECTS == opcode) {
+            GF_QUOTA_OPTION_TYPE_ENABLE_OBJECTS == opcode ||
+            GF_QUOTA_OPTION_TYPE_UPGRADE == opcode) {
+                /* Opcode will be GF_QUOTA_OPTION_TYPE_UPGRADE when there is
+                 * an upgrade from 3.6 to 3.7. Just upgrade the quota.conf
+                 * file even during an op-version bumpup and exit.
+                 */
                 modified = _gf_true;
                 goto out;
         }