ec: Invalidations in disperse volume should not update the stat

Backport of http://review.gluster.org/16329

Issue:
In disperse volume, the file is present across bricks, hence the stat
from one brick doesn't carry the valid size of the file. Therefore
the upcall from one brick updating the md-cache results in wrong size
being updated.

Fix:
If the notification is cache invalidation then, indicate md-cache that
the attributes is invalid.

>Reviewed-on: http://review.gluster.org/16329
>Smoke: Gluster Build System <jenkins@build.gluster.org>
>NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
>Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>
>CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
>Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
(cherry picked from commit 95d07a3d2d68805d93d36a447436e27c48777939)

BUG: 1410688
Change-Id: Id89d2283478e70b62b435a8891fffc86d2be8cb2
Signed-off-by: Poornima G <pgurusid@redhat.com>
Reviewed-on: http://review.gluster.org/16341
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>

5 files changed, 18 insertions, 8 deletions

diff --git a/libglusterfs/src/glusterfs.h b/libglusterfs/src/glusterfs.h
index c1bb29ad974..ab24e9a45f8 100644
--- a/libglusterfs/src/glusterfs.h
+++ b/libglusterfs/src/glusterfs.h
@@ -287,10 +287,6 @@
 #define GF_LK_ADVISORY 0
 #define GF_LK_MANDATORY 1
 
-/* md-cache keys */
-#define MDC_INVALIDATE_IATT "mdc.invalidate.iatt"
-#define MDC_INVALIDATE_XATT "mdc.invalidate.xatt"
-
 const char *fop_enum_to_pri_string (glusterfs_fop_t fop);
 const char *fop_enum_to_string (glusterfs_fop_t fop);
 
diff --git a/libglusterfs/src/upcall-utils.h b/libglusterfs/src/upcall-utils.h
index 47049fd7014..3b5dce33e45 100644
--- a/libglusterfs/src/upcall-utils.h
+++ b/libglusterfs/src/upcall-utils.h
@@ -35,6 +35,8 @@
 
 #define UP_EXPLICIT_LOOKUP 0x00001000 /* Request an explicit lookup */
 
+#define UP_INVAL_ATTR      0x00002000 /* Request to invalidate iatt and xatt */
+
 /* for fops - open, read, lk, */
 #define UP_UPDATE_CLIENT        (UP_ATIME)
 
diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
index 6fbfda3934a..915ec749dd2 100644
--- a/xlators/cluster/afr/src/afr-common.c
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -4809,8 +4809,7 @@ afr_notify (xlator_t *this, int32_t event,
                                 break;
                         for (i = 0; i < priv->child_count; i++) {
                                 if (dict_get (up_ci->dict, priv->pending_key[i])) {
-                                         ret = dict_set_int8 (up_ci->dict,
-                                                              MDC_INVALIDATE_IATT, 0);
+                                         up_ci->flags |= UP_INVAL_ATTR;
                                          itable = ((xlator_t *)this->graph->top)->itable;
                                          /*Internal processes may not have itable for top xlator*/
                                          if (itable)
diff --git a/xlators/cluster/ec/src/ec.c b/xlators/cluster/ec/src/ec.c
index 677761256b4..4d550176f19 100644
--- a/xlators/cluster/ec/src/ec.c
+++ b/xlators/cluster/ec/src/ec.c
@@ -11,6 +11,7 @@
 #include "defaults.h"
 #include "statedump.h"
 #include "compat-errno.h"
+#include "upcall-utils.h"
 
 #include "ec.h"
 #include "ec-messages.h"
@@ -472,10 +473,21 @@ ec_notify (xlator_t *this, int32_t event, void *data, void *data2)
         dict_t            *output   = NULL;
         gf_boolean_t      propagate = _gf_true;
         int32_t           orig_event = event;
+        struct gf_upcall *up_data   = NULL;
+        struct gf_upcall_cache_invalidation *up_ci = NULL;
 
         gf_msg_trace (this->name, 0, "NOTIFY(%d): %p, %p",
                 event, data, data2);
 
+        if (event == GF_EVENT_UPCALL) {
+                up_data = (struct gf_upcall *)data;
+                if (up_data->event_type == GF_UPCALL_CACHE_INVALIDATION) {
+                        up_ci = (struct gf_upcall_cache_invalidation *)up_data->data;
+                        up_ci->flags |= UP_INVAL_ATTR;
+                }
+                goto done;
+        }
+
         if (event == GF_EVENT_TRANSLATOR_OP) {
                 if (!ec->up) {
                         error = -1;
@@ -542,6 +554,7 @@ ec_notify (xlator_t *this, int32_t event, void *data, void *data2)
 unlock:
         UNLOCK (&ec->lock);
 
+done:
         if (propagate) {
                 error = default_notify (this, event, data);
         }
diff --git a/xlators/performance/md-cache/src/md-cache.c b/xlators/performance/md-cache/src/md-cache.c
index 68a9d912319..0ea6cd33e8c 100644
--- a/xlators/performance/md-cache/src/md-cache.c
+++ b/xlators/performance/md-cache/src/md-cache.c
@@ -2645,8 +2645,8 @@ mdc_invalidate (xlator_t *this, void *data)
                 goto out;
         }
 
-        if ((up_ci->flags & (UP_NLINK | UP_RENAME_FLAGS | UP_FORGET)) ||
-            (up_ci->dict && dict_get (up_ci->dict, MDC_INVALIDATE_IATT))) {
+        if (up_ci->flags &
+            (UP_NLINK | UP_RENAME_FLAGS | UP_FORGET | UP_INVAL_ATTR)) {
                 mdc_inode_iatt_invalidate (this, inode);
                 mdc_inode_xatt_invalidate (this, inode);
                 INCREMENT_ATOMIC (conf->mdc_counter.lock,