adding marker translator

Signed-off-by: Junaid <junaid@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

6 files changed, 1537 insertions, 2 deletions

diff --git a/xlators/features/Makefile.am b/xlators/features/Makefile.am
index 8b23b939b..96e503938 100644
--- a/xlators/features/Makefile.am
+++ b/xlators/features/Makefile.am
@@ -1,3 +1,3 @@
-SUBDIRS = locks trash quota read-only access-control mac-compat quiesce #path-converter # filter
+SUBDIRS = locks trash quota read-only access-control mac-compat quiesce marker#path-converter # filter
 
-CLEANFILES = 
+CLEANFILES =
diff --git a/xlators/features/marker/Makefile.am b/xlators/features/marker/Makefile.am
new file mode 100644
index 000000000..a985f42a8
--- /dev/null
+++ b/xlators/features/marker/Makefile.am
@@ -0,0 +1,3 @@
+SUBDIRS = src
+
+CLEANFILES =
diff --git a/xlators/features/marker/src/Makefile.am b/xlators/features/marker/src/Makefile.am
new file mode 100644
index 000000000..58b12b3f5
--- /dev/null
+++ b/xlators/features/marker/src/Makefile.am
@@ -0,0 +1,15 @@
+xlator_LTLIBRARIES = marker.la
+xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/features
+
+marker_la_LDFLAGS = -module -avoidversion
+
+marker_la_SOURCES = marker.c
+marker_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
+
+noinst_HEADERS = marker-mem-types.h marker.h $(top_builddir)/xlators/lib/src/libxlator.h
+
+AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -fno-strict-aliasing -D$(GF_HOST_OS) \
+        -I$(top_srcdir)/libglusterfs/src -I$(top_srcdir)/xlators/lib/src $(GF_CFLAGS) -shared -nostartfiles
+
+CLEANFILES =
+
diff --git a/xlators/features/marker/src/marker-mem-types.h b/xlators/features/marker/src/marker-mem-types.h
new file mode 100644
index 000000000..3936ef794
--- /dev/null
+++ b/xlators/features/marker/src/marker-mem-types.h
@@ -0,0 +1,32 @@
+/*
+   Copyright (c) 2008-2010 Gluster, Inc. <http://www.gluster.com>
+   This file is part of GlusterFS.
+
+   GlusterFS is free software; you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation; either version 3 of the License,
+   or (at your option) any later version.
+
+   GlusterFS is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see
+   <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __MARKER_MEM_TYPES_H__
+#define __MARKER_MEM_TYPES_H__
+
+#include "mem-types.h"
+
+enum gf_marker_mem_types_ {
+        gf_marker_mt_marker_local_t = gf_common_mt_end + 1,
+        gf_marker_mt_marker_conf_t,
+        gf_marker_mt_loc_t,
+        gf_marker_mt_volume_mark,
+        gf_marker_mt_end
+};
+#endif
diff --git a/xlators/features/marker/src/marker.c b/xlators/features/marker/src/marker.c
new file mode 100644
index 000000000..a66b0fd03
--- /dev/null
+++ b/xlators/features/marker/src/marker.c
@@ -0,0 +1,1420 @@
+/*Copyright (c) 2008-2010 Gluster, Inc. <http://www.gluster.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "defaults.h"
+#include "libxlator.h"
+#include "marker.h"
+#include "marker-mem-types.h"
+
+void
+fini (xlator_t *this);
+
+int32_t
+marker_start_setxattr (call_frame_t *, xlator_t *);
+
+int
+marker_loc_fill (loc_t *loc, inode_t *inode, inode_t *parent, char *path)
+{
+        int     ret = -1;
+
+        if (!loc)
+                return ret;
+
+        if (inode) {
+                loc->inode = inode_ref (inode);
+                loc->ino = inode->ino;
+        }
+
+        if (parent)
+                loc->parent = inode_ref (parent);
+
+        loc->path = gf_strdup (path);
+        if (!loc->path) {
+                gf_log ("loc fill", GF_LOG_ERROR, "strdup failed");
+                goto loc_wipe;
+        }
+
+        loc->name = strrchr (loc->path, '/');
+        if (loc->name)
+                loc->name++;
+        else
+                goto loc_wipe;
+
+        ret = 0;
+loc_wipe:
+        if (ret < 0)
+                loc_wipe (loc);
+
+        return ret;
+}
+
+int
+marker_inode_loc_fill (inode_t *inode, loc_t *loc)
+{
+        char            *resolvedpath = NULL;
+        inode_t         *parent       = NULL;
+        int              ret          = -1;
+
+        if ((!inode) || (!loc))
+                return ret;
+
+        if ((inode) && (inode->ino == 1)) {
+                loc->parent = NULL;
+                goto ignore_parent;
+        }
+
+        parent = inode_parent (inode, 0, NULL);
+        if (!parent) {
+                goto err;
+        }
+
+ignore_parent:
+        ret = inode_path (inode, NULL, &resolvedpath);
+        if (ret < 0)
+                goto err;
+
+        ret = marker_loc_fill (loc, inode, parent, resolvedpath);
+        if (ret < 0)
+                goto err;
+
+err:
+        if (parent)
+                inode_unref (parent);
+
+        if (resolvedpath)
+                GF_FREE (resolvedpath);
+
+        return ret;
+}
+
+int32_t
+marker_trav_parent (marker_local_t *local)
+{
+        int32_t ret = 0;
+        loc_t   loc = {0, };
+
+        ret = marker_inode_loc_fill (local->loc.parent, &loc);
+
+        if (ret == -1)
+                goto out;
+
+        loc_wipe (&local->loc);
+
+        local->loc = loc;
+out:
+        return ret;
+}
+
+int32_t
+marker_error_handler (xlator_t *this)
+{
+        marker_conf_t *priv = NULL;
+
+        priv = (marker_conf_t *) this->private;
+
+        unlink (priv->timestamp_file);
+
+        return 0;
+}
+
+int32_t
+marker_free_local (marker_local_t *local)
+{
+        loc_wipe (&local->loc);
+
+        GF_FREE (local);
+
+        return 0;
+}
+
+int32_t
+stat_stampfile (xlator_t *this, marker_conf_t *priv, struct volume_mark **status)
+{
+        struct stat          buf;
+        struct volume_mark  *vol_mark;
+
+        vol_mark = GF_CALLOC (sizeof (struct volume_mark), 1,
+                               gf_marker_mt_volume_mark);
+
+        vol_mark->major = 1;
+        vol_mark->minor = 0;
+
+        GF_ASSERT (sizeof (priv->volume_uuid_bin) == 16);
+        memcpy (vol_mark->uuid, priv->volume_uuid_bin, 16);
+
+        if (stat (priv->timestamp_file, &buf) != -1) {
+                vol_mark->retval = 0;
+                vol_mark->sec = htonl (buf.st_ctime);
+                vol_mark->usec = htonl (ST_CTIM_NSEC (&buf)/1000);
+        } else
+                vol_mark->retval = 0;
+
+        *status = vol_mark;
+
+        return 0;
+}
+
+int32_t
+marker_getxattr_stampfile_cbk (call_frame_t *frame, xlator_t *this,
+                                const char *name, struct volume_mark *vol_mark)
+{
+        int32_t   ret;
+        dict_t   *dict = NULL;
+
+        if (vol_mark == NULL){
+                STACK_UNWIND_STRICT (getxattr, frame, -1, ENOMEM, NULL);
+
+                goto out;
+        }
+
+        dict = dict_new ();
+
+        ret = dict_set_bin (dict, (char *)name, vol_mark,
+                              sizeof (struct volume_mark));
+
+        STACK_UNWIND_STRICT (getxattr, frame, 0, 0, dict);
+
+        dict_unref (dict);
+out:
+        return 0;
+}
+
+int32_t
+call_from_special_client (call_frame_t *frame, xlator_t *this, const char *name)
+{
+        struct volume_mark     *vol_mark   = NULL;
+        marker_conf_t          *priv       = NULL;
+        gf_boolean_t            ret        = _gf_true;
+
+        priv = (marker_conf_t *)this->private;
+
+        if (frame->root->pid != -1 || name == NULL ||
+            strcmp (name, MARKER_XATTR_PREFIX "." VOLUME_MARK) != 0) {
+                ret = _gf_false;
+                goto out;
+        }
+
+        stat_stampfile (this, priv, &vol_mark);
+
+        marker_getxattr_stampfile_cbk (frame, this, name, vol_mark);
+out:
+        return ret;
+}
+
+int32_t
+marker_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                      int32_t op_ret, int32_t op_errno, dict_t *dict)
+{
+        STACK_UNWIND_STRICT (getxattr, frame, op_ret, op_errno, dict);
+        return 0;
+}
+
+int32_t
+marker_getxattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                 const char *name)
+{
+        gf_boolean_t ret;
+
+        gf_log (this->name, GF_LOG_DEBUG, "USER:PID = %d", frame->root->pid);
+
+        ret = call_from_special_client (frame, this, name);
+
+        if (ret == _gf_false)
+                STACK_WIND (frame, marker_getxattr_cbk, FIRST_CHILD(this),
+                            FIRST_CHILD(this)->fops->getxattr, loc, name);
+
+        return 0;
+}
+
+
+int32_t
+marker_setxattr_done (call_frame_t *frame)
+{
+        marker_local_t *local = NULL;
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_DESTROY (frame->root);
+
+        marker_free_local (local);
+
+        return 0;
+}
+
+int
+marker_specific_setxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                              int32_t op_ret, int32_t op_errno)
+{
+        int32_t         ret   = 0;
+        int32_t         done  = 0;
+        marker_local_t *local = NULL;
+
+        local = (marker_local_t*) frame->local;
+
+        if (op_ret == -1 && op_errno == ENOSPC) {
+                marker_error_handler (this);
+                done = 1;
+                goto out;
+        }
+
+        if (strcmp (local->loc.path, "/") == 0) {
+                done = 1;
+                goto out;
+        }
+
+        ret = marker_trav_parent (local);
+
+        if (ret == -1) {
+                gf_log (this->name, GF_LOG_DEBUG, "Error occured "
+                        "while traversing to the parent, stopping marker");
+
+                done = 1;
+
+                goto out;
+        }
+
+        marker_start_setxattr (frame, this);
+
+out:
+        if (done) {
+                marker_setxattr_done (frame);
+        }
+
+        return 0;
+}
+
+int32_t
+marker_start_setxattr (call_frame_t *frame, xlator_t *this)
+{
+        int32_t          ret   = 0;
+        dict_t          *dict  = NULL;
+        marker_local_t  *local = NULL;
+        marker_conf_t   *priv  = NULL;
+
+        priv = this->private;
+
+        local = (marker_local_t*) frame->local;
+
+        dict = dict_new ();
+
+        ret = dict_set_static_bin (dict, priv->marker_xattr,
+                                   (void *)local->timebuf, 8);
+
+        gf_log (this->name, GF_LOG_DEBUG, "path = %s", local->loc.path);
+
+        STACK_WIND (frame, marker_specific_setxattr_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->setxattr, &local->loc, dict, 0);
+
+        dict_unref (dict);
+
+        return 0;
+}
+
+void
+marker_gettimeofday (marker_local_t *local)
+{
+        struct timeval tv;
+
+        gettimeofday (&tv, NULL);
+
+        local->timebuf [0] = htonl (tv.tv_sec);
+        local->timebuf [1] = htonl (tv.tv_usec);
+
+        return;
+}
+
+int32_t
+marker_create_frame (xlator_t *this, marker_local_t *local)
+{
+        call_frame_t *frame = NULL;
+
+        frame = create_frame (this, this->ctx->pool);
+
+        frame->local = (void *) local;
+
+        marker_start_setxattr (frame, this);
+
+        return 0;
+}
+
+int32_t
+update_marks (xlator_t *this, marker_local_t *local, int32_t ret)
+{
+        if (ret == -1 || local->pid < 0)
+                marker_free_local (local);
+        else {
+                marker_gettimeofday (local);
+
+                marker_create_frame (this, local);
+        }
+
+        return 0;
+}
+
+int32_t
+marker_mkdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                   int32_t op_ret, int32_t op_errno, inode_t *inode,
+                   struct iatt *buf, struct iatt *preparent,
+                   struct iatt *postparent)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "error occurred "
+                        "while Creating a file %s", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (mkdir, frame, op_ret, op_errno, inode,
+                             buf, preparent, postparent);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int
+marker_mkdir (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+              dict_t *params)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_mkdir_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->mkdir, loc, mode, params);
+
+        return 0;
+err:
+        STACK_UNWIND_STRICT (mkdir, frame, -1, ENOMEM, NULL,
+                             NULL, NULL, NULL);
+        return 0;
+}
+
+int32_t
+marker_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                    int32_t op_ret, int32_t op_errno, fd_t *fd, inode_t *inode,
+                    struct iatt *buf, struct iatt *preparent,
+                    struct iatt *postparent)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "error occurred "
+                        "while Creating a file %s", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (create, frame, op_ret, op_errno, fd, inode, buf,
+                             preparent, postparent);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
+                mode_t mode, fd_t *fd, dict_t *params)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_create_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->create, loc, flags, mode, fd,
+                    params);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (create, frame, -1, ENOMEM, NULL, NULL, NULL, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                   int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
+                   struct iatt *postbuf)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "error occurred "
+                        "while write, %s", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (writev, frame, op_ret, op_errno, prebuf, postbuf);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_writev (call_frame_t *frame,
+                        xlator_t *this,
+                        fd_t *fd,
+                        struct iovec *vector,
+                        int32_t count,
+                        off_t offset,
+                        struct iobref *iobref)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = marker_inode_loc_fill (fd->inode, &local->loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_writev_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->writev, fd, vector, count, offset,
+                    iobref);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (writev, frame, -1, ENOMEM, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_rmdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                   int32_t op_ret, int32_t op_errno, struct iatt *preparent,
+                   struct iatt *postparent)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "error occurred "
+                        "rmdir %s", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (rmdir, frame, op_ret, op_errno, preparent,
+                             postparent);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_rmdir_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->rmdir, loc, flags);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (rmdir, frame, -1, ENOMEM, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                    int32_t op_ret, int32_t op_errno, struct iatt *preparent,
+                    struct iatt *postparent)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR,
+                        "%s occurred in unlink", strerror (op_errno));
+
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (unlink, frame, op_ret, op_errno, preparent,
+                             postparent);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_unlink_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->unlink, loc);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (unlink, frame, -1, ENOMEM, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                  int32_t op_ret, int32_t op_errno, inode_t *inode,
+                  struct iatt *buf, struct iatt *preparent,
+                  struct iatt *postparent)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "linking a file ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (link, frame, op_ret, op_errno, inode, buf,
+                             preparent, postparent);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, newloc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_link_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->link, oldloc, newloc);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (link, frame, -1, ENOMEM, NULL, NULL, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                    int32_t op_ret, int32_t op_errno, struct iatt *buf,
+                    struct iatt *preoldparent, struct iatt *postoldparent,
+                    struct iatt *prenewparent, struct iatt *postnewparent)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "renaming a file ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (rename, frame, op_ret, op_errno, buf, preoldparent,
+                             postoldparent, prenewparent, postnewparent);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc,
+                loc_t *newloc)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, newloc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_rename_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->rename, oldloc, newloc);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (rename, frame, -1, ENOMEM, NULL,
+                                NULL, NULL, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                      int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
+                      struct iatt *postbuf)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "truncating a file ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (truncate, frame, op_ret, op_errno, prebuf,
+                             postbuf);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_truncate_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->truncate, loc, offset);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (truncate, frame, -1, ENOMEM, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                       int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
+                       struct iatt *postbuf)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "truncating a file ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (ftruncate, frame, op_ret, op_errno, prebuf,
+                             postbuf);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = marker_inode_loc_fill (fd->inode, &local->loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_ftruncate_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->ftruncate, fd, offset);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (ftruncate, frame, -1, ENOMEM, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_symlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                     int32_t op_ret, int32_t op_errno, inode_t *inode,
+                     struct iatt *buf, struct iatt *preparent,
+                     struct iatt *postparent)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "creating symlinks ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (symlink, frame, op_ret, op_errno, inode, buf,
+                             preparent, postparent);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int
+marker_symlink (call_frame_t *frame, xlator_t *this, const char *linkpath,
+                 loc_t *loc, dict_t *params)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_symlink_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->symlink, linkpath, loc, params);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (symlink, frame, -1, ENOMEM, NULL,
+                                NULL, NULL, NULL);
+        return 0;
+}
+
+int32_t
+marker_mknod_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                   int32_t op_ret, int32_t op_errno, inode_t *inode,
+                   struct iatt *buf, struct iatt *preparent,
+                   struct iatt *postparent)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "creating symlinks ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (mknod, frame, op_ret, op_errno, inode,
+                             buf, preparent, postparent);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int
+marker_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+               dev_t rdev, dict_t *parms)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_mknod_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, parms);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (mknod, frame, -1, ENOMEM, NULL,
+                             NULL, NULL, NULL);
+        return 0;
+}
+
+/* when a call from the special client is received on
+ * key trusted.glusterfs.volume-mark with value "RESET"
+ * or if the value is 0length, update the change the
+ * access time and modification time via touching the
+ * timestamp file.
+ */
+int32_t
+call_from_sp_client_to_reset_tmfile (call_frame_t *frame,
+                                     xlator_t     *this,
+                                     dict_t       *dict)
+{
+        int32_t          fd       = 0;
+        int32_t          op_ret   = 0;
+        int32_t          op_errno = 0;
+        data_t          *data     = NULL;
+        marker_conf_t   *priv     = NULL;
+
+        if (frame == NULL || this == NULL || dict == NULL)
+                return -1;
+
+        priv = this->private;
+
+        data = dict_get (dict, "trusted.glusterfs.volume-mark");
+        if (data == NULL)
+                return -1;
+
+        if (frame->root->pid != -1) {
+                op_ret = -1;
+                op_errno = EPERM;
+
+                goto out;
+        }
+
+        if (data->len == 0 || (data->len == 5 &&
+            memcmp (data->data, "RESET", 5) == 0)) {
+                fd = open (priv->timestamp_file, O_WRONLY);
+                if (fd != -1) {
+                        /* this call is needed because of the unsurity
+                         * whether the O_TRUNC would update the timestamps
+                         * on a zero length file as well. Hence updating it
+                         * manually.
+                         */
+                        futimens (fd, NULL);
+                        close (fd);
+                }
+
+                if (fd != -1 || errno == ENOENT) {
+                        op_ret = 0;
+                        op_errno = 0;
+                } else {
+                        op_ret = -1;
+                        op_errno = errno;
+                }
+        } else {
+                op_ret = -1;
+                op_errno = EINVAL;
+        }
+out:
+        STACK_UNWIND_STRICT (setxattr, frame, op_ret, op_errno);
+
+        return 0;
+}
+
+int32_t
+marker_setxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                      int32_t op_ret, int32_t op_errno)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "creating symlinks ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (setxattr, frame, op_ret, op_errno);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
+                  int32_t flags)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ret = call_from_sp_client_to_reset_tmfile (frame, this, dict);
+        if (ret == 0)
+                return 0;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_setxattr_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->setxattr, loc, dict, flags);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (setxattr, frame, -1, ENOMEM);
+
+        return 0;
+}
+
+int32_t
+marker_fsetxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                       int32_t op_ret, int32_t op_errno)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "creating symlinks ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (fsetxattr, frame, op_ret, op_errno);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_fsetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict,
+                   int32_t flags)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ret = call_from_sp_client_to_reset_tmfile (frame, this, dict);
+        if (ret == 0)
+                return 0;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = marker_inode_loc_fill (fd->inode, &local->loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_fsetxattr_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->fsetxattr, fd, dict, flags);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (fsetxattr, frame, -1, ENOMEM);
+
+        return 0;
+}
+
+int32_t
+marker_fsetattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                      int32_t op_ret, int32_t op_errno, struct iatt *statpre,
+                      struct iatt *statpost)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "creating symlinks ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (fsetattr, frame, op_ret, op_errno, statpre,
+                             statpost);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
+                  struct iatt *stbuf, int32_t valid)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = marker_inode_loc_fill (fd->inode, &local->loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_fsetattr_cbk, FIRST_CHILD (this),
+                    FIRST_CHILD (this)->fops->fsetattr, fd, stbuf, valid);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (fsetattr, frame, -1, ENOMEM, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                     int32_t op_ret, int32_t op_errno, struct iatt *statpre,
+                     struct iatt *statpost)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "creating symlinks ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (setattr, frame, op_ret, op_errno, statpre,
+                             statpost);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                 struct iatt *stbuf, int32_t valid)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_setattr_cbk, FIRST_CHILD (this),
+                    FIRST_CHILD (this)->fops->setattr, loc, stbuf, valid);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (setattr, frame, -1, ENOMEM, NULL, NULL);
+
+        return 0;
+}
+
+int32_t
+marker_removexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                         int32_t op_ret, int32_t op_errno)
+{
+        int32_t             ret     = 0;
+        marker_local_t     *local   = NULL;
+
+        if (op_ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "%s occured while "
+                        "creating symlinks ", strerror (op_errno));
+                ret = -1;
+        }
+
+        local = (marker_local_t *) frame->local;
+
+        frame->local = NULL;
+
+        STACK_UNWIND_STRICT (removexattr, frame, op_ret, op_errno);
+
+        update_marks (this, local, ret);
+
+        return 0;
+}
+
+int32_t
+marker_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                     const char *name)
+{
+        int32_t          ret   = 0;
+        marker_local_t  *local = NULL;
+
+        ALLOCATE_OR_GOTO (local, marker_local_t, err);
+
+        MARKER_INIT_LOCAL (frame, local);
+
+        ret = loc_copy (&local->loc, loc);
+
+        if (ret == -1)
+                goto err;
+
+        STACK_WIND (frame, marker_removexattr_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->removexattr, loc, name);
+        return 0;
+err:
+        STACK_UNWIND_STRICT (removexattr, frame, -1, ENOMEM);
+
+        return 0;
+}
+
+int32_t
+mem_acct_init (xlator_t *this)
+{
+        int     ret = -1;
+
+        if (!this)
+                return ret;
+
+        ret = xlator_mem_acct_init (this, gf_marker_mt_end + 1);
+
+        if (ret != 0) {
+                gf_log(this->name, GF_LOG_ERROR, "Memory accounting init"
+                                "failed");
+                return ret;
+        }
+
+        return ret;
+}
+
+int32_t
+init (xlator_t *this)
+{
+        dict_t        *options = NULL;
+        data_t        *data    = NULL;
+        int32_t        ret     = 0;
+        marker_conf_t *priv    = NULL;
+
+        if (!this->children) {
+                gf_log (this->name, GF_LOG_ERROR,
+                        "marker translator needs subvolume defined.");
+                return -1;
+        }
+
+        if (!this->parents) {
+                gf_log (this->name, GF_LOG_WARNING,
+                        "Volume is dangling.");
+                return -1;
+        }
+
+        options = this->options;
+
+        ALLOCATE_OR_GOTO (this->private, marker_conf_t, err);
+
+        priv = this->private;
+
+        if( (data = dict_get (options, VOLUME_UUID)) != NULL) {
+                priv->volume_uuid = data->data;
+
+                ret = uuid_parse (priv->volume_uuid, priv->volume_uuid_bin);
+                if (ret == -1) {
+                        gf_log (this->name, GF_LOG_ERROR, "invalid volume uuid %s", priv->volume_uuid);
+                        goto err;
+                }
+
+                ret = gf_asprintf (& (priv->marker_xattr), "%s.%s.%s",
+                                   MARKER_XATTR_PREFIX, priv->volume_uuid, XTIME);
+
+                if (ret == -1){
+                        priv->marker_xattr = NULL;
+
+                        gf_log (this->name, GF_LOG_ERROR,
+                                "Failed to allocate memory");
+                        goto err;
+                }
+
+                gf_log (this->name, GF_LOG_DEBUG,
+                        "the volume-uuid = %s", priv->volume_uuid);
+        } else {
+                priv->volume_uuid = NULL;
+
+                gf_log (this->name, GF_LOG_ERROR,
+                        "please specify the volume-uuid"
+                        "in the translator options");
+
+                return -1;
+        }
+
+        if ((data = dict_get (options, TIMESTAMP_FILE)) != NULL) {
+                priv->timestamp_file = data->data;
+
+                gf_log (this->name, GF_LOG_DEBUG,
+                        "the timestamp-file is = %s",
+                        priv->timestamp_file);
+
+        } else {
+                priv->timestamp_file = NULL;
+
+                gf_log (this->name, GF_LOG_ERROR,
+                        "please specify the timestamp-file"
+                        "in the translator options");
+
+                goto err;
+        }
+
+        return 0;
+err:
+        fini (this);
+
+        return -1;
+}
+
+void
+fini (xlator_t *this)
+{
+        marker_conf_t *priv = NULL;
+
+        priv = (marker_conf_t *) this->private;
+
+        if (priv == NULL)
+                goto out;
+
+        if (priv->volume_uuid != NULL)
+                GF_FREE (priv->volume_uuid);
+
+        if (priv->timestamp_file != NULL)
+                GF_FREE (priv->timestamp_file);
+
+        if (priv->marker_xattr != NULL)
+                GF_FREE (priv->marker_xattr);
+
+        GF_FREE (priv);
+out:
+        return ;
+}
+
+struct xlator_fops fops = {
+        .create      = marker_create,
+        .unlink      = marker_unlink,
+        .link        = marker_link,
+        .mkdir       = marker_mkdir,
+        .rmdir       = marker_rmdir,
+        .writev      = marker_writev,
+        .rename      = marker_rename,
+        .truncate    = marker_truncate,
+        .ftruncate   = marker_ftruncate,
+        .symlink     = marker_symlink,
+        .mknod       = marker_mknod,
+        .setxattr    = marker_setxattr,
+        .fsetxattr   = marker_fsetxattr,
+        .setattr     = marker_setattr,
+        .fsetattr    = marker_fsetattr,
+        .removexattr = marker_removexattr,
+        .getxattr    = marker_getxattr
+};
+
+struct xlator_cbks cbks = {
+};
+
+struct volume_options options[] = {
+        {.key = {"volume-uuid"}},
+        {.key = {"timestamp-file"}},
+        {.key = {NULL}}
+};
diff --git a/xlators/features/marker/src/marker.h b/xlators/features/marker/src/marker.h
new file mode 100644
index 000000000..60567c3b8
--- /dev/null
+++ b/xlators/features/marker/src/marker.h
@@ -0,0 +1,65 @@
+/*Copyright (c) 2008-2010 Gluster, Inc. <http://www.gluster.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "defaults.h"
+#include "uuid.h"
+
+#define MARKER_XATTR_PREFIX "trusted.glusterfs"
+#define XTIME               "xtime"
+#define VOLUME_MARK         "volume-mark"
+#define VOLUME_UUID         "volume-uuid"
+#define TIMESTAMP_FILE      "timestamp-file"
+
+/*initialize the local variable*/
+#define MARKER_INIT_LOCAL(_frame,_local) do {                   \
+                _frame->local = _local;                         \
+                _local->pid = _frame->root->pid;                \
+                memset (&_local->loc, 0, sizeof (loc_t));       \
+        } while (0)
+
+/* try alloc and if it fails, goto label */
+#define ALLOCATE_OR_GOTO(var, type, label) do {                  \
+                var = GF_CALLOC (sizeof (type), 1,               \
+                                 gf_marker_mt_##type);           \
+                if (!var) {                                      \
+                        gf_log (this->name, GF_LOG_ERROR,        \
+                                "out of memory :(");             \
+                        goto label;                              \
+                }                                                \
+        } while (0)
+
+struct marker_local{
+        uint32_t        timebuf[2];
+        pid_t           pid;
+        loc_t           loc;
+};
+typedef struct marker_local marker_local_t;
+
+struct marker_conf{
+        char        *volume_uuid;
+        uuid_t      volume_uuid_bin;
+        char        *timestamp_file;
+        char        *marker_xattr;
+};
+typedef struct marker_conf marker_conf_t;