adding libxlator, to ensure proper client side aggregation of marks by clustering translators

Signed-off-by: Kaushik BV <kaushikbv@gluster.com>
Signed-off-by: Csaba Henk <csaba@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 2310 (georeplication)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2310

3 files changed, 117 insertions, 3 deletions

diff --git a/xlators/cluster/stripe/src/Makefile.am b/xlators/cluster/stripe/src/Makefile.am
index 6d4fae4d2..0db3c9eeb 100644
--- a/xlators/cluster/stripe/src/Makefile.am
+++ b/xlators/cluster/stripe/src/Makefile.am
@@ -4,13 +4,14 @@ xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/cluster
 
 stripe_la_LDFLAGS = -module -avoidversion
 
-stripe_la_SOURCES = stripe.c
+stripe_la_SOURCES = stripe.c $(top_builddir)/xlators/lib/src/libxlator.c
 stripe_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
 
-noinst_HEADERS = stripe.h stripe-mem-types.h
+noinst_HEADERS = stripe.h stripe-mem-types.h $(top_builddir)/xlators/lib/src/libxlator.h
 
 AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)\
-	-I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS)
+	-I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS) \
+	-I$(top_srcdir)/xlators/lib/src
 
 CLEANFILES = 
 
diff --git a/xlators/cluster/stripe/src/stripe.c b/xlators/cluster/stripe/src/stripe.c
index 639fbfd8b..cc34a8468 100644
--- a/xlators/cluster/stripe/src/stripe.c
+++ b/xlators/cluster/stripe/src/stripe.c
@@ -34,6 +34,7 @@
  */
 
 #include "stripe.h"
+#include "libxlator.h"
 
 void
 stripe_local_wipe (stripe_local_t *local)
@@ -3896,6 +3897,7 @@ init (xlator_t *this)
         priv->nodes_down = priv->child_count;
         this->private = priv;
 
+
         ret = 0;
 out:
         if (ret) {
@@ -3942,6 +3944,110 @@ out:
         return;
 }
 
+int32_t
+stripe_getxattr_unwind (void *getxattr, call_frame_t *frame,
+                        int op_ret, int op_errno, dict_t *dict)
+
+{
+        STACK_UNWIND_STRICT (getxattr, frame, op_ret, op_errno, dict);
+        return 0;
+}
+
+int32_t
+stripe_getxattr (call_frame_t *frame, xlator_t *this,
+              loc_t *loc, const char *name)
+{
+        stripe_local_t     *local = NULL;
+        xlator_list_t      *trav = NULL;
+        stripe_private_t   *priv = NULL;
+        int32_t             op_errno = EINVAL;
+        int                 i = 0;
+        xlator_t          **sub_volumes;
+
+        VALIDATE_OR_GOTO (frame, err);
+        VALIDATE_OR_GOTO (this, err);
+        VALIDATE_OR_GOTO (loc, err);
+        VALIDATE_OR_GOTO (loc->path, err);
+        VALIDATE_OR_GOTO (loc->inode, err);
+
+        priv = this->private;
+        trav = this->children;
+
+        /* Initialization */
+        local = GF_CALLOC (1, sizeof (stripe_local_t),
+                           gf_stripe_mt_stripe_local_t);
+        if (!local) {
+                op_errno = ENOMEM;
+                goto err;
+        }
+        local->op_ret = -1;
+        frame->local = local;
+        loc_copy (&local->loc, loc);
+
+
+        if (name && (strcmp (GF_XATTR_MARKER_KEY, name) == 0)
+                 && (-1 == frame->root->pid)) {
+                local->marker.call_count = priv->child_count;
+
+                sub_volumes = alloca ( priv->child_count *
+                                       sizeof (xlator_t *));
+                for (i = 0, trav = this->children; trav ;
+                                trav = trav->next, i++) {
+
+                        *(sub_volumes + i)  = trav->xlator;
+
+                }
+
+                if (cluster_getmarkerattr (frame, this, loc, name,
+                                           local, stripe_getxattr_unwind,
+                                           sub_volumes, priv->child_count,
+                                           MARKER_UUID_TYPE, priv->vol_uuid)) {
+                        op_errno = EINVAL;
+                        goto err;
+                }
+
+                return 0;
+        }
+
+        if (*priv->vol_uuid) {
+                if ((match_uuid_local (name, priv->vol_uuid) == 0)
+                    && (-1 == frame->root->pid)) {
+                        local->marker.call_count = priv->child_count;
+
+                        sub_volumes = alloca ( priv->child_count *
+                                               sizeof (xlator_t *));
+                        for (i = 0, trav = this->children; trav ;
+                                        trav = trav->next, i++) {
+
+                                *(sub_volumes + i) = trav->xlator;
+
+                        }
+
+                        if (cluster_getmarkerattr (frame, this, loc, name,
+                                                   local, stripe_getxattr_unwind,
+                                                   sub_volumes,
+                                                   priv->child_count,
+                                                   MARKER_XTIME_TYPE,
+                                                   priv->vol_uuid)) {
+                                op_errno = EINVAL;
+                                goto err;
+                        }
+                        return 0;
+                }
+        }
+
+
+        STACK_WIND (frame, default_getxattr_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->getxattr, loc, name);
+
+        return 0;
+
+err:
+        STACK_UNWIND_STRICT (getxattr, frame, -1, op_errno, NULL);
+        return 0;
+}
+
+
 
 struct xlator_fops fops = {
         .stat        = stripe_stat,
@@ -3967,6 +4073,8 @@ struct xlator_fops fops = {
         .fsetattr    = stripe_fsetattr,
         .lookup      = stripe_lookup,
         .mknod       = stripe_mknod,
+
+        .getxattr    = stripe_getxattr,
 };
 
 struct xlator_cbks cbks = {
diff --git a/xlators/cluster/stripe/src/stripe.h b/xlators/cluster/stripe/src/stripe.h
index 6199c0061..86555144f 100644
--- a/xlators/cluster/stripe/src/stripe.h
+++ b/xlators/cluster/stripe/src/stripe.h
@@ -33,6 +33,7 @@
 #include "compat.h"
 #include "compat-errno.h"
 #include "stripe-mem-types.h"
+#include "libxlator.h"
 #include <fnmatch.h>
 #include <signal.h>
 
@@ -84,6 +85,7 @@ struct stripe_private {
         int8_t                  child_count;
         int8_t                 *state; /* Current state of child node */
         gf_boolean_t            xattr_supported;  /* default yes */
+        char                    vol_uuid[UUID_SIZE + 1];
 };
 
 /**
@@ -163,6 +165,8 @@ struct stripe_local {
         /* For File I/O fops */
         dict_t              *dict;
 
+        struct marker_str    marker;
+
         /* General usage */
         off_t                offset;
         off_t                stripe_size;
@@ -180,4 +184,5 @@ struct stripe_local {
 typedef struct stripe_local   stripe_local_t;
 typedef struct stripe_private stripe_private_t;
 
+
 #endif /* _STRIPE_H_ */