add xlator debug/io-stats

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

4 files changed, 1534 insertions, 1 deletions

diff --git a/xlators/debug/Makefile.am b/xlators/debug/Makefile.am
index 16cf893a1..b655554ef 100644
--- a/xlators/debug/Makefile.am
+++ b/xlators/debug/Makefile.am
@@ -1,3 +1,3 @@
-SUBDIRS = trace error-gen
+SUBDIRS = trace error-gen io-stats
 
 CLEANFILES = 
diff --git a/xlators/debug/io-stats/Makefile.am b/xlators/debug/io-stats/Makefile.am
new file mode 100644
index 000000000..a985f42a8
--- /dev/null
+++ b/xlators/debug/io-stats/Makefile.am
@@ -0,0 +1,3 @@
+SUBDIRS = src
+
+CLEANFILES =
diff --git a/xlators/debug/io-stats/src/Makefile.am b/xlators/debug/io-stats/src/Makefile.am
new file mode 100644
index 000000000..91aea6ebb
--- /dev/null
+++ b/xlators/debug/io-stats/src/Makefile.am
@@ -0,0 +1,13 @@
+
+xlator_LTLIBRARIES = io-stats.la
+xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/debug
+
+io_stats_la_LDFLAGS = -module -avoidversion
+
+io_stats_la_SOURCES = io-stats.c
+io_stats_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
+
+AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)\
+	-I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS)
+
+CLEANFILES =
diff --git a/xlators/debug/io-stats/src/io-stats.c b/xlators/debug/io-stats/src/io-stats.c
new file mode 100644
index 000000000..2a46f4d78
--- /dev/null
+++ b/xlators/debug/io-stats/src/io-stats.c
@@ -0,0 +1,1517 @@
+/*
+  Copyright (c) 2006-2009 Z RESEARCH, Inc. <http://www.zresearch.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
+
+/**
+ * xlators/debug/io_stats :
+ *    This translator maintains a counter for each fop (that is,
+ *    a counter which stores the number of invocations for the certain
+ *    fop), and makes these counters accessible as extended attributes.
+ */
+
+#include <errno.h>
+#include "glusterfs.h"
+#include "xlator.h"
+
+#define BUMP_HIT(op)                                            \
+do {                                                            \
+        LOCK (&((io_stats_private_t *)this->private)->lock);    \
+        {                                                       \
+                ((io_stats_private_t *)this->private)           \
+                  ->fop_records[GF_FOP_##op].hits++;            \
+        }                                                       \
+        UNLOCK (&((io_stats_private_t *)this->private)->lock);  \
+ } while (0)
+
+struct io_stats_private {
+        gf_lock_t lock;
+        struct {
+                char *name;
+                int enabled;
+                uint32_t hits;
+        } fop_records[GF_FOP_MAXVALUE];
+};
+typedef struct io_stats_private io_stats_private_t;
+
+int32_t
+io_stats_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 stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, fd, inode, buf);
+        return 0;
+}
+
+int32_t
+io_stats_open_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno,
+                   fd_t *fd)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, fd);
+        return 0;
+}
+
+int32_t
+io_stats_stat_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno,
+                   struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_readv_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    struct iovec *vector,
+                    int32_t count,
+                    struct stat *buf,
+                    struct iobref *iobref)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, vector, count, buf, iobref);
+        return 0;
+}
+
+int32_t
+io_stats_writev_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_getdents_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno,
+                       dir_entry_t *entries,
+                       int32_t count)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, entries, count);
+        return 0;
+}
+
+int32_t
+io_stats_readdir_cbk (call_frame_t *frame,
+                      void *cookie,
+                      xlator_t *this,
+                      int32_t op_ret,
+                      int32_t op_errno,
+                      gf_dirent_t *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_fsync_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+int32_t
+io_stats_chown_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_chmod_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_fchmod_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_fchown_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_unlink_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+int32_t
+io_stats_rename_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_readlink_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno,
+                       const char *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_lookup_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     inode_t *inode,
+                     struct stat *buf,
+                     dict_t *xattr)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, inode, buf, xattr);
+        return 0;
+}
+
+int32_t
+io_stats_symlink_cbk (call_frame_t *frame,
+                      void *cookie,
+                      xlator_t *this,
+                      int32_t op_ret,
+                      int32_t op_errno,
+                      inode_t *inode,
+                      struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, inode, buf);
+        return 0;
+}
+
+int32_t
+io_stats_mknod_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    inode_t *inode,
+                    struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, inode, buf);
+        return 0;
+}
+
+
+int32_t
+io_stats_mkdir_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    inode_t *inode,
+                    struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, inode, buf);
+        return 0;
+}
+
+int32_t
+io_stats_link_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno,
+                   inode_t *inode,
+                   struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, inode, buf);
+        return 0;
+}
+
+int32_t
+io_stats_flush_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+
+int32_t
+io_stats_opendir_cbk (call_frame_t *frame,
+                      void *cookie,
+                      xlator_t *this,
+                      int32_t op_ret,
+                      int32_t op_errno,
+                      fd_t *fd)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, fd);
+        return 0;
+}
+
+int32_t
+io_stats_rmdir_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+int32_t
+io_stats_truncate_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno,
+                       struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_utimens_cbk (call_frame_t *frame,
+                      void *cookie,
+                      xlator_t *this,
+                      int32_t op_ret,
+                      int32_t op_errno,
+                      struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_statfs_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     struct statvfs *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_setxattr_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+int32_t
+io_stats_getxattr_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno,
+                       dict_t *dict)
+{
+        io_stats_private_t *priv = this->private;
+        int i = 0;
+        char keycont[] = "trusted.glusterfs.hits." /* 23 chars */
+                         "0123456789"
+                         "0123456789"
+                         "0123456789"
+                         "0123456789";
+        int ret = -1;
+
+        memset (keycont + 23, '\0', 40);
+
+        for (i = 0; i < GF_FOP_MAXVALUE; i++) {
+                if (!(priv->fop_records[i].enabled &&
+                      priv->fop_records[i].name))
+                        continue;
+
+                strncpy (keycont + 23, priv->fop_records[i].name, 40);
+                LOCK(&priv->lock);
+                {
+                        ret = dict_set_uint32 (dict, keycont,
+                                               priv->fop_records[i].hits);
+                }
+                UNLOCK(&priv->lock);
+                if (ret < 0) {
+                        gf_log (this->name, GF_LOG_ERROR,
+                                "dict set failed for xattr %s",
+                                keycont);
+                        break;
+                }
+        }
+
+        STACK_UNWIND (frame, op_ret, op_errno, dict);
+        return 0;
+}
+
+int32_t
+io_stats_removexattr_cbk (call_frame_t *frame,
+                          void *cookie,
+                          xlator_t *this,
+                          int32_t op_ret,
+                          int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+
+int32_t
+io_stats_fsyncdir_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+int32_t
+io_stats_access_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+int32_t
+io_stats_ftruncate_cbk (call_frame_t *frame,
+                        void *cookie,
+                        xlator_t *this,
+                        int32_t op_ret,
+                        int32_t op_errno,
+                        struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_fstat_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    struct stat *buf)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, buf);
+        return 0;
+}
+
+int32_t
+io_stats_lk_cbk (call_frame_t *frame,
+                 void *cookie,
+                 xlator_t *this,
+                 int32_t op_ret,
+                 int32_t op_errno,
+                 struct flock *lock)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, lock);
+        return 0;
+}
+
+
+int32_t
+io_stats_setdents_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+int32_t
+io_stats_entrylk_cbk (call_frame_t *frame,
+                      void *cookie,
+                      xlator_t *this,
+                      int32_t op_ret,
+                      int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+
+int32_t
+io_stats_xattrop_cbk (call_frame_t *frame,
+                      void *cookie,
+                      xlator_t *this,
+                      int32_t op_ret,
+                      int32_t op_errno,
+                      dict_t *dict)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, dict);
+        return 0;
+}
+
+int32_t
+io_stats_fxattrop_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno,
+                       dict_t *dict)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, dict);
+        return 0;
+}
+
+int32_t
+io_stats_inodelk_cbk (call_frame_t *frame,
+                      void *cookie,
+                      xlator_t *this,
+                      int32_t op_ret,
+                      int32_t op_errno)
+{
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+
+int32_t
+io_stats_entrylk (call_frame_t *frame, xlator_t *this,
+                  const char *volume, loc_t *loc, const char *basename,
+                  entrylk_cmd cmd, entrylk_type type)
+{
+        BUMP_HIT(ENTRYLK);
+
+        STACK_WIND (frame,
+                    io_stats_entrylk_cbk,
+                    FIRST_CHILD (this),
+                    FIRST_CHILD (this)->fops->entrylk,
+                    volume, loc, basename, cmd, type);
+        return 0;
+}
+
+int32_t
+io_stats_inodelk (call_frame_t *frame,
+                  xlator_t *this,
+                  const char *volume, loc_t *loc, int32_t cmd, struct flock *flock)
+{
+
+        BUMP_HIT(INODELK);
+
+        STACK_WIND (frame,
+                    io_stats_inodelk_cbk,
+                    FIRST_CHILD (this),
+                    FIRST_CHILD (this)->fops->inodelk,
+                    volume, loc, cmd, flock);
+        return 0;
+}
+
+
+int32_t
+io_stats_finodelk_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno)
+{
+
+        STACK_UNWIND (frame, op_ret, op_errno);
+        return 0;
+}
+
+int32_t
+io_stats_finodelk (call_frame_t *frame,
+                   xlator_t *this,
+                   const char *volume, fd_t *fd, int32_t cmd, struct flock *flock)
+{
+        BUMP_HIT(FINODELK);
+
+        STACK_WIND (frame,
+                    io_stats_finodelk_cbk,
+                    FIRST_CHILD (this),
+                    FIRST_CHILD (this)->fops->finodelk,
+                    volume, fd, cmd, flock);
+        return 0;
+}
+
+
+int32_t
+io_stats_xattrop (call_frame_t *frame,
+                  xlator_t *this,
+                  loc_t *loc,
+                  gf_xattrop_flags_t flags,
+                  dict_t *dict)
+{
+        BUMP_HIT(XATTROP);
+
+        STACK_WIND (frame, io_stats_xattrop_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->xattrop,
+                    loc, flags, dict);
+
+        return 0;
+}
+
+int32_t
+io_stats_fxattrop (call_frame_t *frame,
+                   xlator_t *this,
+                   fd_t *fd,
+                   gf_xattrop_flags_t flags,
+                   dict_t *dict)
+{
+        BUMP_HIT(FXATTROP);
+
+        STACK_WIND (frame, io_stats_fxattrop_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->fxattrop,
+                    fd, flags, dict);
+
+        return 0;
+}
+
+int32_t
+io_stats_lookup (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc,
+                 dict_t *xattr_req)
+{
+        BUMP_HIT(LOOKUP);
+
+        STACK_WIND (frame, io_stats_lookup_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->lookup,
+                    loc, xattr_req);
+
+        return 0;
+}
+
+int32_t
+io_stats_stat (call_frame_t *frame,
+               xlator_t *this,
+               loc_t *loc)
+{
+        BUMP_HIT(STAT);
+
+        STACK_WIND (frame,
+                    io_stats_stat_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->stat,
+                    loc);
+
+        return 0;
+}
+
+int32_t
+io_stats_readlink (call_frame_t *frame,
+                   xlator_t *this,
+                   loc_t *loc,
+                   size_t size)
+{
+        BUMP_HIT(READLINK);
+
+        STACK_WIND (frame,
+                    io_stats_readlink_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->readlink,
+                    loc,
+                    size);
+
+        return 0;
+}
+
+int32_t
+io_stats_mknod (call_frame_t *frame,
+                xlator_t *this,
+                loc_t *loc,
+                mode_t mode,
+                dev_t dev)
+{
+        BUMP_HIT(MKNOD);
+
+        STACK_WIND (frame,
+                    io_stats_mknod_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->mknod,
+                    loc,
+                    mode,
+                    dev);
+
+        return 0;
+}
+
+int32_t
+io_stats_mkdir (call_frame_t *frame,
+                xlator_t *this,
+                loc_t *loc,
+                mode_t mode)
+{
+        BUMP_HIT(MKDIR);
+
+        STACK_WIND (frame,
+                    io_stats_mkdir_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->mkdir,
+                    loc,
+                    mode);
+        return 0;
+}
+
+int32_t
+io_stats_unlink (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc)
+{
+        BUMP_HIT(UNLINK);
+
+        STACK_WIND (frame,
+                    io_stats_unlink_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->unlink,
+                    loc);
+        return 0;
+}
+
+int32_t
+io_stats_rmdir (call_frame_t *frame,
+                xlator_t *this,
+                loc_t *loc)
+{
+        BUMP_HIT(RMDIR);
+
+        STACK_WIND (frame,
+                    io_stats_rmdir_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->rmdir,
+                    loc);
+
+        return 0;
+}
+
+int32_t
+io_stats_symlink (call_frame_t *frame,
+                  xlator_t *this,
+                  const char *linkpath,
+                  loc_t *loc)
+{
+        BUMP_HIT(SYMLINK);
+
+        STACK_WIND (frame,
+                    io_stats_symlink_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->symlink,
+                    linkpath,
+                    loc);
+
+        return 0;
+}
+
+int32_t
+io_stats_rename (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *oldloc,
+                 loc_t *newloc)
+{
+        BUMP_HIT(RENAME);
+
+        STACK_WIND (frame,
+                    io_stats_rename_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->rename,
+                    oldloc,
+                    newloc);
+
+        return 0;
+}
+
+int32_t
+io_stats_link (call_frame_t *frame,
+               xlator_t *this,
+               loc_t *oldloc,
+               loc_t *newloc)
+{
+        BUMP_HIT(LINK);
+
+        STACK_WIND (frame,
+                    io_stats_link_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->link,
+                    oldloc,
+                    newloc);
+        return 0;
+}
+
+int32_t
+io_stats_chmod (call_frame_t *frame,
+                xlator_t *this,
+                loc_t *loc,
+                mode_t mode)
+{
+        BUMP_HIT(CHMOD);
+
+        STACK_WIND (frame,
+                    io_stats_chmod_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->chmod,
+                    loc,
+                    mode);
+
+        return 0;
+}
+
+int32_t
+io_stats_chown (call_frame_t *frame,
+                xlator_t *this,
+                loc_t *loc,
+                uid_t uid,
+                gid_t gid)
+{
+        BUMP_HIT(CHOWN);
+
+        STACK_WIND (frame,
+                    io_stats_chown_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->chown,
+                    loc,
+                    uid,
+                    gid);
+
+        return 0;
+}
+
+int32_t
+io_stats_truncate (call_frame_t *frame,
+                   xlator_t *this,
+                   loc_t *loc,
+                   off_t offset)
+{
+        BUMP_HIT(TRUNCATE);
+
+        STACK_WIND (frame,
+                    io_stats_truncate_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->truncate,
+                    loc,
+                    offset);
+
+        return 0;
+}
+
+int32_t
+io_stats_utimens (call_frame_t *frame,
+                  xlator_t *this,
+                  loc_t *loc,
+                  struct timespec tv[2])
+{
+        BUMP_HIT(UTIMENS);
+
+        STACK_WIND (frame,
+                    io_stats_utimens_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->utimens,
+                    loc,
+                    tv);
+
+        return 0;
+}
+
+int32_t
+io_stats_open (call_frame_t *frame,
+               xlator_t *this,
+               loc_t *loc,
+               int32_t flags,
+               fd_t *fd)
+{
+        BUMP_HIT(OPEN);
+
+        STACK_WIND (frame,
+                    io_stats_open_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->open,
+                    loc,
+                    flags,
+                    fd);
+        return 0;
+}
+
+int32_t
+io_stats_create (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc,
+                 int32_t flags,
+                 mode_t mode,
+                 fd_t *fd)
+{
+        BUMP_HIT(CREATE);
+
+        STACK_WIND (frame,
+                    io_stats_create_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->create,
+                    loc,
+                    flags,
+                    mode,
+                    fd);
+        return 0;
+}
+
+int32_t
+io_stats_readv (call_frame_t *frame,
+                xlator_t *this,
+                fd_t *fd,
+                size_t size,
+                off_t offset)
+{
+        BUMP_HIT(READ);
+
+        STACK_WIND (frame,
+                    io_stats_readv_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->readv,
+                    fd,
+                    size,
+                    offset);
+        return 0;
+}
+
+int32_t
+io_stats_writev (call_frame_t *frame,
+                 xlator_t *this,
+                 fd_t *fd,
+                 struct iovec *vector,
+                 int32_t count,
+                 off_t offset,
+                 struct iobref *iobref)
+{
+        BUMP_HIT(WRITE);
+
+        STACK_WIND (frame,
+                    io_stats_writev_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->writev,
+                    fd,
+                    vector,
+                    count,
+                    offset,
+                    iobref);
+        return 0;
+}
+
+int32_t
+io_stats_statfs (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc)
+{
+        BUMP_HIT(STATFS);
+
+        STACK_WIND (frame,
+                    io_stats_statfs_cbk,
+                    FIRST_CHILD(this), FIRST_CHILD(this)->fops->statfs,
+                    loc);
+        return 0;
+}
+
+int32_t
+io_stats_flush (call_frame_t *frame,
+                xlator_t *this,
+                fd_t *fd)
+{
+        BUMP_HIT(FLUSH);
+
+        STACK_WIND (frame,
+                    io_stats_flush_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->flush,
+                    fd);
+        return 0;
+}
+
+
+int32_t
+io_stats_fsync (call_frame_t *frame,
+                xlator_t *this,
+                fd_t *fd,
+                int32_t flags)
+{
+        BUMP_HIT(FSYNC);
+
+        STACK_WIND (frame,
+                    io_stats_fsync_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->fsync,
+                    fd,
+                    flags);
+        return 0;
+}
+
+int32_t
+io_stats_setxattr (call_frame_t *frame,
+                   xlator_t *this,
+                   loc_t *loc,
+                   dict_t *dict,
+                   int32_t flags)
+{
+        BUMP_HIT(SETXATTR);
+
+        STACK_WIND (frame,
+                    io_stats_setxattr_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->setxattr,
+                    loc,
+                    dict,
+                    flags);
+        return 0;
+}
+
+int32_t
+io_stats_getxattr (call_frame_t *frame,
+                   xlator_t *this,
+                   loc_t *loc,
+                   const char *name)
+{
+        BUMP_HIT(GETXATTR);
+
+        STACK_WIND (frame,
+                    io_stats_getxattr_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->getxattr,
+                    loc,
+                    name);
+        return 0;
+}
+
+int32_t
+io_stats_removexattr (call_frame_t *frame,
+                      xlator_t *this,
+                      loc_t *loc,
+                      const char *name)
+{
+        BUMP_HIT(REMOVEXATTR);
+
+        STACK_WIND (frame,
+                    io_stats_removexattr_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->removexattr,
+                    loc,
+                    name);
+
+        return 0;
+}
+
+int32_t
+io_stats_opendir (call_frame_t *frame,
+                  xlator_t *this,
+                  loc_t *loc,
+                  fd_t *fd)
+{
+        BUMP_HIT(OPENDIR);
+
+        STACK_WIND (frame,
+                    io_stats_opendir_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->opendir,
+                    loc,
+                    fd);
+        return 0;
+}
+
+int32_t
+io_stats_getdents (call_frame_t *frame,
+                   xlator_t *this,
+                   fd_t *fd,
+                   size_t size,
+                   off_t offset,
+                   int32_t flag)
+{
+        BUMP_HIT(GETDENTS);
+
+        STACK_WIND (frame,
+                    io_stats_getdents_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->getdents,
+                    fd,
+                    size,
+                    offset,
+                    flag);
+        return 0;
+}
+
+
+int32_t
+io_stats_readdir (call_frame_t *frame,
+                  xlator_t *this,
+                  fd_t *fd,
+                  size_t size,
+                  off_t offset)
+{
+        BUMP_HIT(READDIR);
+
+        STACK_WIND (frame,
+                    io_stats_readdir_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->readdir,
+                    fd,
+                    size,
+                    offset);
+
+        return 0;
+}
+
+
+int32_t
+io_stats_fsyncdir (call_frame_t *frame,
+                   xlator_t *this,
+                   fd_t *fd,
+                   int32_t datasync)
+{
+        BUMP_HIT(FSYNCDIR);
+
+        STACK_WIND (frame,
+                    io_stats_fsyncdir_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->fsyncdir,
+                    fd,
+                    datasync);
+        return 0;
+}
+
+int32_t
+io_stats_access (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc,
+                 int32_t mask)
+{
+        BUMP_HIT(ACCESS);
+
+        STACK_WIND (frame,
+                    io_stats_access_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->access,
+                    loc,
+                    mask);
+        return 0;
+}
+
+int32_t
+io_stats_ftruncate (call_frame_t *frame,
+                    xlator_t *this,
+                    fd_t *fd,
+                    off_t offset)
+{
+        BUMP_HIT(FTRUNCATE);
+
+        STACK_WIND (frame,
+                    io_stats_ftruncate_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->ftruncate,
+                    fd,
+                    offset);
+
+        return 0;
+}
+
+int32_t
+io_stats_fchown (call_frame_t *frame,
+                 xlator_t *this,
+                 fd_t *fd,
+                 uid_t uid,
+                 gid_t gid)
+{
+        BUMP_HIT(FCHOWN);
+
+        STACK_WIND (frame,
+                    io_stats_fchown_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->fchown,
+                    fd,
+                    uid,
+                    gid);
+        return 0;
+}
+
+int32_t
+io_stats_fchmod (call_frame_t *frame,
+                 xlator_t *this,
+                 fd_t *fd,
+                 mode_t mode)
+{
+        BUMP_HIT(FCHMOD);
+
+        STACK_WIND (frame,
+                    io_stats_fchmod_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->fchmod,
+                    fd,
+                    mode);
+        return 0;
+}
+
+int32_t
+io_stats_fstat (call_frame_t *frame,
+                xlator_t *this,
+                fd_t *fd)
+{
+        BUMP_HIT(FSTAT);
+
+        STACK_WIND (frame,
+                    io_stats_fstat_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->fstat,
+                    fd);
+        return 0;
+}
+
+int32_t
+io_stats_lk (call_frame_t *frame,
+             xlator_t *this,
+             fd_t *fd,
+             int32_t cmd,
+             struct flock *lock)
+{
+        BUMP_HIT(LK);
+
+        STACK_WIND (frame,
+                    io_stats_lk_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->lk,
+                    fd,
+                    cmd,
+                    lock);
+        return 0;
+}
+
+int32_t
+io_stats_setdents (call_frame_t *frame,
+                   xlator_t *this,
+                   fd_t *fd,
+                   int32_t flags,
+                   dir_entry_t *entries,
+                   int32_t count)
+{
+        BUMP_HIT(SETDENTS);
+
+        STACK_WIND (frame,
+                    io_stats_setdents_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->setdents,
+                    fd,
+                    flags,
+                    entries,
+                    count);
+        return 0;
+}
+
+
+int32_t
+io_stats_checksum_cbk (call_frame_t *frame,
+                       void *cookie,
+                       xlator_t *this,
+                       int32_t op_ret,
+                       int32_t op_errno,
+                       uint8_t *fchecksum,
+                       uint8_t *dchecksum)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, fchecksum, dchecksum);
+
+        return 0;
+}
+
+int32_t
+io_stats_checksum (call_frame_t *frame,
+                   xlator_t *this,
+                   loc_t *loc,
+                   int32_t flag)
+{
+        STACK_WIND (frame,
+                    io_stats_checksum_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->checksum,
+                    loc,
+                    flag);
+
+        return 0;
+}
+
+
+int32_t
+io_stats_stats_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    struct xlator_stats *stats)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, stats);
+        return 0;
+}
+
+int32_t
+io_stats_stats (call_frame_t *frame,
+                xlator_t *this,
+                int32_t flags)
+{
+        STACK_WIND (frame,
+                    io_stats_stats_cbk,
+                    FIRST_CHILD(this),
+                    FIRST_CHILD(this)->mops->stats,
+                    flags);
+
+        return 0;
+}
+
+void
+enable_all_calls (io_stats_private_t *priv, int enabled)
+{
+        int i;
+        for (i = 0; i < GF_FOP_MAXVALUE; i++)
+                priv->fop_records[i].enabled = enabled;
+}
+
+void
+enable_call (io_stats_private_t *priv, const char *name, int enabled)
+{
+        int i;
+        for (i = 0; i < GF_FOP_MAXVALUE; i++) {
+                if (!priv->fop_records[i].name)
+                        continue;
+                if (!strcasecmp(priv->fop_records[i].name, name))
+                        priv->fop_records[i].enabled = enabled;
+        }
+}
+
+
+/*
+   include = 1 for "include-ops"
+           = 0 for "exclude-ops"
+*/
+void
+process_call_list (io_stats_private_t *priv, const char *list, int include)
+{
+        enable_all_calls (priv, include ? 0 : 1);
+
+        char *call = strsep ((char **)&list, ",");
+        while (call) {
+                enable_call (priv, call, include);
+                call = strsep ((char **)&list, ",");
+        }
+}
+
+
+int32_t
+init (xlator_t *this)
+{
+        dict_t *options = this->options;
+        char *includes = NULL, *excludes = NULL;
+        io_stats_private_t *priv = NULL;
+
+        if (!this)
+                return -1;
+
+        if (!this->children || this->children->next) {
+                gf_log (this->name, GF_LOG_ERROR,
+                        "io_stats translator requires one subvolume");
+                return -1;
+        }
+        if (!this->parents) {
+                gf_log (this->name, GF_LOG_WARNING,
+                        "dangling volume. check volfile ");
+        }
+
+        priv = CALLOC (1, sizeof(*priv));
+        ERR_ABORT (priv);
+
+        includes = data_to_str (dict_get (options, "include-ops"));
+        excludes = data_to_str (dict_get (options, "exclude-ops"));
+
+        {
+                int i;
+                for (i = 0; i < GF_FOP_MAXVALUE; i++) {
+                        priv->fop_records[i].name = gf_fop_list[i];
+                        priv->fop_records[i].enabled = 1;
+                }
+        }
+
+        if (includes && excludes) {
+                gf_log (this->name,
+                        GF_LOG_ERROR,
+                        "must specify only one of 'include-ops' and 'exclude-ops'");
+                return -1;
+        }
+        if (includes)
+                process_call_list (priv, includes, 1);
+        if (excludes)
+                process_call_list (priv, excludes, 0);
+
+        LOCK_INIT (&priv->lock);
+
+        /* Set this translator's inode table pointer to child node's pointer. */
+        this->itable = FIRST_CHILD (this)->itable;
+        this->private = priv;
+
+        return 0;
+}
+
+void
+fini (xlator_t *this)
+{
+        io_stats_private_t *priv = NULL;
+
+        if (!this)
+                return;
+
+        priv = this->private;
+        if (priv) {
+                LOCK_DESTROY (&priv->lock);
+                FREE (priv);
+        }
+
+        gf_log (this->name, GF_LOG_NORMAL,
+                "io-stats translator unloaded");
+        return;
+}
+
+struct xlator_fops fops = {
+        .stat        = io_stats_stat,
+        .readlink    = io_stats_readlink,
+        .mknod       = io_stats_mknod,
+        .mkdir       = io_stats_mkdir,
+        .unlink      = io_stats_unlink,
+        .rmdir       = io_stats_rmdir,
+        .symlink     = io_stats_symlink,
+        .rename      = io_stats_rename,
+        .link        = io_stats_link,
+        .chmod       = io_stats_chmod,
+        .chown       = io_stats_chown,
+        .truncate    = io_stats_truncate,
+        .utimens     = io_stats_utimens,
+        .open        = io_stats_open,
+        .readv       = io_stats_readv,
+        .writev      = io_stats_writev,
+        .statfs      = io_stats_statfs,
+        .flush       = io_stats_flush,
+        .fsync       = io_stats_fsync,
+        .setxattr    = io_stats_setxattr,
+        .getxattr    = io_stats_getxattr,
+        .removexattr = io_stats_removexattr,
+        .opendir     = io_stats_opendir,
+        .readdir     = io_stats_readdir,
+        .fsyncdir    = io_stats_fsyncdir,
+        .access      = io_stats_access,
+        .ftruncate   = io_stats_ftruncate,
+        .fstat       = io_stats_fstat,
+        .create      = io_stats_create,
+        .fchown      = io_stats_fchown,
+        .fchmod      = io_stats_fchmod,
+        .lk          = io_stats_lk,
+        .inodelk     = io_stats_inodelk,
+        .finodelk    = io_stats_finodelk,
+        .entrylk     = io_stats_entrylk,
+        .lookup      = io_stats_lookup,
+        .setdents    = io_stats_setdents,
+        .getdents    = io_stats_getdents,
+        .checksum    = io_stats_checksum,
+        .xattrop     = io_stats_xattrop,
+        .fxattrop    = io_stats_fxattrop,
+};
+
+struct xlator_mops mops = {
+        .stats    = io_stats_stats,
+};
+
+struct xlator_cbks cbks = {
+};
+
+struct volume_options options[] = {
+        { .key  = {"include-ops", "include"},
+          .type = GF_OPTION_TYPE_STR,
+          /*.value = { ""} */
+        },
+        { .key  = {"exclude-ops", "exclude"},
+          .type = GF_OPTION_TYPE_STR
+          /*.value = { ""} */
+        },
+        { .key  = {NULL} },
+};