Added all files

1 files changed, 2724 insertions, 0 deletions

diff --git a/glusterfs-guts/src/fuse-bridge.c b/glusterfs-guts/src/fuse-bridge.c
new file mode 100644
index 00000000000..0972563c65e
--- /dev/null
+++ b/glusterfs-guts/src/fuse-bridge.c
@@ -0,0 +1,2724 @@
+/*
+   Copyright (c) 2006, 2007, 2008 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/>.
+*/
+
+
+#include <stdint.h>
+#include <signal.h>
+#include <pthread.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif /* _CONFIG_H */
+
+#include "glusterfs.h"
+#include "logging.h"
+#include "xlator.h"
+#include "glusterfs.h"
+#include "transport.h"
+#include "defaults.h"
+#include "common-utils.h"
+
+#include <fuse/fuse_lowlevel.h>
+
+#include "fuse-extra.h"
+#include "list.h"
+
+#include "guts-lowlevel.h"
+
+#define BIG_FUSE_CHANNEL_SIZE 1048576
+
+struct fuse_private {
+  int fd;
+  struct fuse *fuse;
+  struct fuse_session *se;
+  struct fuse_chan *ch;
+  char *mountpoint;
+};
+
+char glusterfs_fuse_direct_io_mode = 1;
+float glusterfs_fuse_entry_timeout = 1.0;
+float glusterfs_fuse_attr_timeout = 1.0;
+
+#define FI_TO_FD(fi) ((fd_t *)((long)fi->fh))
+
+#define FUSE_FOP(state, ret, op, args ...)                      \
+do {                                                            \
+  call_frame_t *frame = get_call_frame_for_req (state, 1);      \
+  xlator_t *xl = frame->this->children ?                        \
+                        frame->this->children->xlator : NULL;   \
+  dict_t *refs = frame->root->req_refs;                         \
+  frame->root->state = state;                                   \
+  STACK_WIND (frame, ret, xl, xl->fops->op, args);              \
+  dict_unref (refs);                                            \
+} while (0)
+
+#define FUSE_FOP_NOREPLY(state, op, args ...)                    \
+do {                                                             \
+  call_frame_t *_frame = get_call_frame_for_req (state, 0);      \
+  xlator_t *xl = _frame->this->children->xlator;                 \
+  _frame->root->req_refs = NULL;                                 \
+  STACK_WIND (_frame, fuse_nop_cbk, xl, xl->fops->op, args);     \
+} while (0)
+
+typedef struct {
+  loc_t loc;
+  inode_t *parent;
+  inode_t *inode;
+  char *name;
+} fuse_loc_t;
+
+typedef struct {
+  void *pool;
+  xlator_t *this;
+  inode_table_t *itable;
+  fuse_loc_t fuse_loc;
+  fuse_loc_t fuse_loc2;
+  fuse_req_t req;
+
+  int32_t flags;
+  off_t off;
+  size_t size;
+  unsigned long nlookup;
+  fd_t *fd;
+  dict_t *dict;
+  char *name;
+  char is_revalidate;
+} fuse_state_t;
+
+
+static void
+loc_wipe (loc_t *loc)
+{
+  if (loc->inode) {
+    inode_unref (loc->inode);
+    loc->inode = NULL;
+  }
+  if (loc->path) {
+    FREE (loc->path);
+    loc->path = NULL;
+  }
+}
+
+
+static inode_t *
+dummy_inode (inode_table_t *table)
+{
+  inode_t *dummy;
+
+  dummy = CALLOC (1, sizeof (*dummy));
+  ERR_ABORT (dummy);
+
+  dummy->table = table;
+
+  INIT_LIST_HEAD (&dummy->list);
+  INIT_LIST_HEAD (&dummy->inode_hash);
+  INIT_LIST_HEAD (&dummy->fds);
+  INIT_LIST_HEAD (&dummy->dentry.name_hash);
+  INIT_LIST_HEAD (&dummy->dentry.inode_list);
+
+  dummy->ref = 1;
+  dummy->ctx = get_new_dict ();
+
+  LOCK_INIT (&dummy->lock);
+  return dummy;
+}
+
+static void
+fuse_loc_wipe (fuse_loc_t *fuse_loc)
+{
+  loc_wipe (&fuse_loc->loc);
+  if (fuse_loc->name) {
+    FREE (fuse_loc->name);
+    fuse_loc->name = NULL;
+  }
+  if (fuse_loc->inode) {
+    inode_unref (fuse_loc->inode);
+    fuse_loc->inode = NULL;
+  }
+  if (fuse_loc->parent) {
+    inode_unref (fuse_loc->parent);
+    fuse_loc->parent = NULL;
+  }
+}
+
+
+static void
+free_state (fuse_state_t *state)
+{
+  fuse_loc_wipe (&state->fuse_loc);
+
+  fuse_loc_wipe (&state->fuse_loc2);
+
+  if (state->dict) {
+    dict_unref (state->dict);
+    state->dict = (void *)0xaaaaeeee;
+  }
+  if (state->name) {
+    FREE (state->name);
+    state->name = NULL;
+  }
+#ifdef DEBUG
+  memset (state, 0x90, sizeof (*state));
+#endif
+  FREE (state);
+  state = NULL;
+}
+
+
+static int32_t
+fuse_nop_cbk (call_frame_t *frame,
+	      void *cookie,
+	      xlator_t *this,
+	      int32_t op_ret,
+	      int32_t op_errno)
+{
+  if (frame->root->state)
+    free_state (frame->root->state);
+
+  frame->root->state = EEEEKS;
+  STACK_DESTROY (frame->root);
+  return 0;
+}
+
+fuse_state_t *
+state_from_req (fuse_req_t req)
+{
+  fuse_state_t *state;
+  transport_t *trans = fuse_req_userdata (req);
+
+  state = (void *)calloc (1, sizeof (*state));
+  ERR_ABORT (state);
+  state->pool = trans->xl->ctx->pool;
+  state->itable = trans->xl->itable;
+  state->req = req;
+  state->this = trans->xl;
+
+  return state;
+}
+
+
+static call_frame_t *
+get_call_frame_for_req (fuse_state_t *state, char d)
+{
+  call_pool_t *pool = state->pool;
+  fuse_req_t req = state->req;
+  const struct fuse_ctx *ctx = NULL;
+  call_ctx_t *cctx = NULL;
+  transport_t *trans = NULL;
+
+  cctx = CALLOC (1, sizeof (*cctx));
+  ERR_ABORT (cctx);
+  cctx->frames.root = cctx;
+
+  if (req) {
+    ctx = fuse_req_ctx(req);
+
+    cctx->uid = ctx->uid;
+    cctx->gid = ctx->gid;
+    cctx->pid = ctx->pid;
+    cctx->unique = req_callid (req);
+  }
+
+  if (req) {
+    trans = fuse_req_userdata (req);
+    cctx->frames.this = trans->xl;
+    cctx->trans = trans;
+  } else {
+    cctx->frames.this = state->this;
+  }
+
+  if (d) {
+    cctx->req_refs = dict_ref (get_new_dict ());
+    dict_set (cctx->req_refs, NULL, trans->buf);
+    cctx->req_refs->is_locked = 1;
+  }
+
+  cctx->pool = pool;
+  LOCK (&pool->lock);
+  list_add (&cctx->all_frames, &pool->all_frames);
+  UNLOCK (&pool->lock);
+
+  return &cctx->frames;
+}
+
+
+static void
+fuse_loc_fill (fuse_loc_t *fuse_loc,
+	       fuse_state_t *state,
+	       ino_t ino,
+	       const char *name)
+{
+  size_t n;
+  inode_t *inode, *parent = NULL;
+
+  /* resistance against multiple invocation of loc_fill not to get
+     reference leaks via inode_search() */
+  inode = fuse_loc->inode;
+  if (!inode) {
+    inode = inode_search (state->itable, ino, name);
+  }
+  fuse_loc->inode = inode;
+
+  if (name) {
+    if (!fuse_loc->name)
+      fuse_loc->name = strdup (name);
+
+    parent = fuse_loc->parent;
+    if (!parent) {
+      if (inode)
+	parent = inode_parent (inode, ino);
+      else
+	parent = inode_search (state->itable, ino, NULL);
+    }
+  }
+  fuse_loc->parent = parent;
+
+  if (inode) {
+    fuse_loc->loc.inode = inode_ref (inode);
+    fuse_loc->loc.ino = inode->ino;
+  }
+
+  if (parent) {
+    n = inode_path (parent, name, NULL, 0) + 1;
+    fuse_loc->loc.path = CALLOC (1, n);
+    ERR_ABORT (fuse_loc->loc.path);
+    inode_path (parent, name, (char *)fuse_loc->loc.path, n);
+  } else if (inode) {
+    n = inode_path (inode, NULL, NULL, 0) + 1;
+    fuse_loc->loc.path = CALLOC (1, n);
+    ERR_ABORT (fuse_loc->loc.path);
+    inode_path (inode, NULL, (char *)fuse_loc->loc.path, n);
+  }
+}
+
+static int32_t
+fuse_lookup_cbk (call_frame_t *frame,
+		 void *cookie,
+		 xlator_t *this,
+		 int32_t op_ret,
+		 int32_t op_errno,
+		 inode_t *inode,
+		 struct stat *stat,
+		 dict_t *dict);
+
+static int32_t
+fuse_entry_cbk (call_frame_t *frame,
+		void *cookie,
+		xlator_t *this,
+		int32_t op_ret,
+		int32_t op_errno,
+		inode_t *inode,
+		struct stat *buf)
+{
+  fuse_state_t *state;
+  fuse_req_t req;
+  struct fuse_entry_param e = {0, };
+
+  state = frame->root->state;
+  req = state->req;
+
+  if (!op_ret) {
+    if (inode->ino == 1)
+      buf->st_ino = 1;
+  }
+
+  if (!op_ret && inode && inode->ino && buf && inode->ino != buf->st_ino) {
+    /* temporary workaround to handle AFR returning differnt inode number */
+    gf_log ("glusterfs-fuse", GF_LOG_WARNING,
+	    "%"PRId64": %s => inode number changed %"PRId64" -> %"PRId64,
+	    frame->root->unique, state->fuse_loc.loc.path,
+	    inode->ino, buf->st_ino);
+    inode_unref (state->fuse_loc.loc.inode);
+    state->fuse_loc.loc.inode = dummy_inode (state->itable);
+    state->is_revalidate = 2;
+
+    STACK_WIND (frame, fuse_lookup_cbk,
+		FIRST_CHILD (this), FIRST_CHILD (this)->fops->lookup,
+		&state->fuse_loc.loc, 
+		0);
+
+    return 0;
+  }
+
+  if (op_ret == 0) {
+    ino_t ino = buf->st_ino;
+    inode_t *fuse_inode;
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": %s => %"PRId64, frame->root->unique,
+	    state->fuse_loc.loc.path, ino);
+
+  try_again:
+    fuse_inode = inode_update (state->itable, state->fuse_loc.parent,
+			       state->fuse_loc.name, buf);
+
+    if (fuse_inode->ctx) {
+      /* if the inode was already in the hash, checks to flush out
+	 old name hashes */
+      if ((fuse_inode->st_mode ^ buf->st_mode) & S_IFMT) {
+	gf_log ("glusterfs-fuse", GF_LOG_WARNING,
+		"%"PRId64": %s => %"PRId64" Rehashing %x/%x",
+		frame->root->unique,
+		state->fuse_loc.loc.path, ino, (S_IFMT & buf->st_ino),
+		(S_IFMT & fuse_inode->st_mode));
+
+	fuse_inode->st_mode = buf->st_mode;
+	inode_unhash_name (state->itable, fuse_inode);
+	inode_unref (fuse_inode);
+	goto try_again;
+      }
+      if (buf->st_nlink == 1) {
+	/* no other name hashes should exist */
+	if (!list_empty (&fuse_inode->dentry.inode_list)) {
+	  gf_log ("glusterfs-fuse", GF_LOG_WARNING,
+		  "%"PRId64": %s => %"PRId64" Rehashing because st_nlink less than dentry maps",
+		  frame->root->unique,
+		  state->fuse_loc.loc.path, ino);
+	  inode_unhash_name (state->itable, fuse_inode);
+	  inode_unref (fuse_inode);
+	  goto try_again;
+	}
+	if ((state->fuse_loc.parent != fuse_inode->dentry.parent) ||
+	    strcmp (state->fuse_loc.name, fuse_inode->dentry.name)) {
+	  gf_log ("glusterfs-fuse", GF_LOG_WARNING,
+		  "%"PRId64": %s => %"PRId64" Rehashing because single st_nlink does not match dentry map",
+		  frame->root->unique,
+		  state->fuse_loc.loc.path, ino);
+	  inode_unhash_name (state->itable, fuse_inode);
+	  inode_unref (fuse_inode);
+	  goto try_again;
+	}
+      }
+    }
+
+    if ((fuse_inode->ctx != inode->ctx) &&
+	list_empty (&fuse_inode->fds)) {
+      dict_t *swap = inode->ctx;
+      inode->ctx = fuse_inode->ctx;
+      fuse_inode->ctx = swap;
+      fuse_inode->generation = inode->generation;
+      fuse_inode->st_mode = buf->st_mode;
+    }
+
+    inode_lookup (fuse_inode);
+
+    inode_unref (fuse_inode);
+
+    /* TODO: make these timeouts configurable (via meta?) */
+    e.ino = fuse_inode->ino;
+    e.generation = buf->st_ctime;
+    e.entry_timeout = glusterfs_fuse_entry_timeout;
+    e.attr_timeout = glusterfs_fuse_attr_timeout;
+    e.attr = *buf;
+    e.attr.st_blksize = BIG_FUSE_CHANNEL_SIZE;
+    if (state->fuse_loc.parent)
+      fuse_reply_entry (req, &e);
+    else
+      fuse_reply_attr (req, buf, glusterfs_fuse_attr_timeout);
+  } else {
+    if (state->is_revalidate == -1 && op_errno == ENOENT) {
+      gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	      "%"PRId64": %s => -1 (%d)", frame->root->unique,
+	      state->fuse_loc.loc.path, op_errno);
+    } else {
+      gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	      "%"PRId64": %s => -1 (%d)", frame->root->unique,
+	      state->fuse_loc.loc.path, op_errno);
+    }
+
+    if (state->is_revalidate == 1) {
+      gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	      "unlinking stale dentry for `%s'",
+	      state->fuse_loc.loc.path);
+
+      if (state->fuse_loc.parent)
+	inode_unlink (state->itable, state->fuse_loc.parent,
+		      state->fuse_loc.name); 
+
+      inode_unref (state->fuse_loc.loc.inode);
+      state->fuse_loc.loc.inode = dummy_inode (state->itable);
+      state->is_revalidate = 2;
+
+      STACK_WIND (frame, fuse_lookup_cbk,
+		  FIRST_CHILD (this), FIRST_CHILD (this)->fops->lookup,
+		  &state->fuse_loc.loc, 0);
+
+      return 0;
+    }
+
+    fuse_reply_err (req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+  return 0;
+}
+
+
+static int32_t
+fuse_lookup_cbk (call_frame_t *frame,
+		 void *cookie,
+		 xlator_t *this,
+		 int32_t op_ret,
+		 int32_t op_errno,
+		 inode_t *inode,
+		 struct stat *stat,
+		 dict_t *dict)
+{
+  fuse_entry_cbk (frame, cookie, this, op_ret, op_errno, inode, stat);
+  return 0;
+}
+
+
+static void
+fuse_lookup (fuse_req_t req,
+	     fuse_ino_t par,
+	     const char *name)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  fuse_loc_fill (&state->fuse_loc, state, par, name);
+
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": LOOKUP %s", req_callid (req),
+	    state->fuse_loc.loc.path);
+
+    state->fuse_loc.loc.inode = dummy_inode (state->itable);
+    /* to differntiate in entry_cbk what kind of call it is */
+    state->is_revalidate = -1;
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": LOOKUP %s(%"PRId64")", req_callid (req),
+	    state->fuse_loc.loc.path, state->fuse_loc.loc.inode->ino);
+    state->is_revalidate = 1;
+  }
+
+  FUSE_FOP (state, fuse_lookup_cbk, lookup,
+	    &state->fuse_loc.loc, 0);
+}
+
+
+static void
+fuse_forget (fuse_req_t req,
+	     fuse_ino_t ino,
+	     unsigned long nlookup)
+{
+  inode_t *fuse_inode;
+  fuse_state_t *state;
+
+  if (ino == 1) {
+    fuse_reply_none (req);
+    return;
+  }
+
+  state = state_from_req (req);
+  fuse_inode = inode_search (state->itable, ino, NULL);
+  inode_forget (fuse_inode, nlookup);
+  inode_unref (fuse_inode);
+
+  free_state (state);
+  fuse_reply_none (req);
+}
+
+
+static int32_t
+fuse_attr_cbk (call_frame_t *frame,
+	       void *cookie,
+	       xlator_t *this,
+	       int32_t op_ret,
+	       int32_t op_errno,
+	       struct stat *buf)
+{
+  fuse_state_t *state;
+  fuse_req_t req;
+
+  state = frame->root->state;
+  req = state->req;
+
+  if (op_ret == 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": %s => %"PRId64, frame->root->unique,
+	    state->fuse_loc.loc.path ? state->fuse_loc.loc.path : "ERR",
+	    buf->st_ino);
+    /* TODO: make these timeouts configurable via meta */
+    /* TODO: what if the inode number has changed by now */ 
+    buf->st_blksize = BIG_FUSE_CHANNEL_SIZE;
+    fuse_reply_attr (req, buf, glusterfs_fuse_attr_timeout);
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64"; %s => -1 (%d)", frame->root->unique,
+	    state->fuse_loc.loc.path ? state->fuse_loc.loc.path : "ERR",
+	    op_errno);
+    fuse_reply_err (req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+  return 0;
+}
+
+
+static void
+fuse_getattr (fuse_req_t req,
+	      fuse_ino_t ino,
+	      struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  if (ino == 1) {
+    fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+    if (state->fuse_loc.loc.inode)
+      state->is_revalidate = 1;
+    else
+      state->is_revalidate = -1;
+    FUSE_FOP (state,
+	      fuse_lookup_cbk, lookup, &state->fuse_loc.loc, 0);
+    return;
+  }
+
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": GETATTR %"PRId64" (%s) (fuse_loc_fill() returned NULL inode)", 
+	    req_callid (req), (int64_t)ino, state->fuse_loc.loc.path);
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  if (list_empty (&state->fuse_loc.loc.inode->fds) || 
+      S_ISDIR (state->fuse_loc.loc.inode->st_mode)) {
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": GETATTR %"PRId64" (%s)",
+	    req_callid (req), (int64_t)ino, state->fuse_loc.loc.path);
+    
+    FUSE_FOP (state,
+	      fuse_attr_cbk,
+	      stat,
+	      &state->fuse_loc.loc);
+  } else {
+    fd_t *fd  = list_entry (state->fuse_loc.loc.inode->fds.next,
+			    fd_t, inode_list);
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": FGETATTR %"PRId64" (%s/%p)",
+	    req_callid (req), (int64_t)ino, state->fuse_loc.loc.path, fd);
+
+    FUSE_FOP (state,
+	      fuse_attr_cbk,
+	      fstat, fd);
+  }
+}
+
+
+static int32_t
+fuse_fd_cbk (call_frame_t *frame,
+	     void *cookie,
+	     xlator_t *this,
+	     int32_t op_ret,
+	     int32_t op_errno,
+	     fd_t *fd)
+{
+  fuse_state_t *state;
+  fuse_req_t req;
+
+  state = frame->root->state;
+  req = state->req;
+  fd = state->fd;
+
+  if (op_ret >= 0) {
+    struct fuse_file_info fi = {0, };
+
+    LOCK (&fd->inode->lock);
+    list_add (&fd->inode_list, &fd->inode->fds);
+    UNLOCK (&fd->inode->lock);
+
+    fi.fh = (unsigned long) fd;
+    fi.flags = state->flags;
+
+    if (!S_ISDIR (fd->inode->st_mode)) {
+      if ((fi.flags & 3) && glusterfs_fuse_direct_io_mode)
+	  fi.direct_io = 1;
+    }
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": %s => %p", frame->root->unique,
+	    state->fuse_loc.loc.path, fd);
+
+    if (fuse_reply_open (req, &fi) == -ENOENT) {
+      gf_log ("glusterfs-fuse", GF_LOG_WARNING, "open() got EINTR");
+      state->req = 0;
+
+      if (S_ISDIR (fd->inode->st_mode))
+	FUSE_FOP_NOREPLY (state, closedir, fd);
+      else
+	FUSE_FOP_NOREPLY (state, close, fd);
+    }
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": %s => -1 (%d)", frame->root->unique,
+	    state->fuse_loc.loc.path, op_errno);
+    fuse_reply_err (req, op_errno);
+    fd_destroy (fd);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+  return 0;
+}
+
+
+
+static void
+do_chmod (fuse_req_t req,
+	  fuse_ino_t ino,
+	  struct stat *attr,
+	  struct fuse_file_info *fi)
+{
+  fuse_state_t *state = state_from_req (req);
+
+  if (fi) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": FCHMOD %p", req_callid (req), FI_TO_FD (fi));
+
+    FUSE_FOP (state,
+	      fuse_attr_cbk,
+	      fchmod,
+	      FI_TO_FD (fi),
+	      attr->st_mode);
+  } else {
+    fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+    if (!state->fuse_loc.loc.inode) {
+      gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	      "%"PRId64": CHMOD %"PRId64" (%s) (fuse_loc_fill() returned NULL inode)", 
+	      req_callid (req), (int64_t)ino, state->fuse_loc.loc.path);
+      fuse_reply_err (req, EINVAL);
+      return;
+    }
+
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": CHMOD %s", req_callid (req),
+	    state->fuse_loc.loc.path);
+
+    FUSE_FOP (state,
+	      fuse_attr_cbk,
+	      chmod,
+	      &state->fuse_loc.loc,
+	      attr->st_mode);
+  }
+}
+
+static void
+do_chown (fuse_req_t req,
+	  fuse_ino_t ino,
+	  struct stat *attr,
+	  int valid,
+	  struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  uid_t uid = (valid & FUSE_SET_ATTR_UID) ? attr->st_uid : (uid_t) -1;
+  gid_t gid = (valid & FUSE_SET_ATTR_GID) ? attr->st_gid : (gid_t) -1;
+
+  state = state_from_req (req);
+
+  if (fi) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": FCHOWN %p", req_callid (req), FI_TO_FD (fi));
+
+    FUSE_FOP (state,
+	      fuse_attr_cbk,
+	      fchown,
+	      FI_TO_FD (fi),
+	      uid,
+	      gid);
+  } else {
+    fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+    if (!state->fuse_loc.loc.inode) {
+      gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	      "%"PRId64": CHOWN %"PRId64" (%s) (fuse_loc_fill() returned NULL inode)", 
+	      req_callid (req), (int64_t)ino, state->fuse_loc.loc.path);
+      fuse_reply_err (req, EINVAL);
+      return;
+    }
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": CHOWN %s", req_callid (req),
+	    state->fuse_loc.loc.path);
+
+    FUSE_FOP (state,
+	      fuse_attr_cbk,
+	      chown,
+	      &state->fuse_loc.loc,
+	      uid,
+	      gid);
+  }
+}
+
+static void 
+do_truncate (fuse_req_t req,
+	     fuse_ino_t ino,
+	     struct stat *attr,
+	     struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  if (fi) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": FTRUNCATE %p/%"PRId64, req_callid (req),
+	    FI_TO_FD (fi), attr->st_size);
+
+    FUSE_FOP (state,
+	      fuse_attr_cbk,
+	      ftruncate,
+	      FI_TO_FD (fi),
+	      attr->st_size);
+  } else {
+    fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+    if (!state->fuse_loc.loc.inode) {
+      gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	      "%"PRId64": TRUNCATE %s/%"PRId64" (fuse_loc_fill() returned NULL inode)", 
+	      req_callid (req), state->fuse_loc.loc.path, attr->st_size);
+      fuse_reply_err (req, EINVAL);
+      return;
+    }
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": TRUNCATE %s/%"PRId64, req_callid (req),
+	    state->fuse_loc.loc.path, attr->st_size);
+
+    FUSE_FOP (state,
+	      fuse_attr_cbk,
+	      truncate,
+	      &state->fuse_loc.loc,
+	      attr->st_size);
+  }
+
+  return;
+}
+
+static void 
+do_utimes (fuse_req_t req,
+	   fuse_ino_t ino,
+	   struct stat *attr)
+{
+  fuse_state_t *state;
+
+  struct timespec tv[2];
+#ifdef FUSE_STAT_HAS_NANOSEC
+  tv[0] = ST_ATIM(attr);
+  tv[1] = ST_MTIM(attr);
+#else
+  tv[0].tv_sec = attr->st_atime;
+  tv[0].tv_nsec = 0;
+  tv[1].tv_sec = attr->st_mtime;
+  tv[1].tv_nsec = 0;
+#endif
+
+  state = state_from_req (req);
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": UTIMENS %s (fuse_loc_fill() returned NULL inode)", 
+	    req_callid (req), state->fuse_loc.loc.path);
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": UTIMENS %s", req_callid (req),
+	  state->fuse_loc.loc.path);
+
+  FUSE_FOP (state,
+	    fuse_attr_cbk,
+	    utimens,
+	    &state->fuse_loc.loc,
+	    tv);
+}
+
+static void
+fuse_setattr (fuse_req_t req,
+	      fuse_ino_t ino,
+	      struct stat *attr,
+	      int valid,
+	      struct fuse_file_info *fi)
+{
+
+  if (valid & FUSE_SET_ATTR_MODE)
+    do_chmod (req, ino, attr, fi);
+  else if (valid & (FUSE_SET_ATTR_UID | FUSE_SET_ATTR_GID))
+    do_chown (req, ino, attr, valid, fi);
+  else if (valid & FUSE_SET_ATTR_SIZE)
+    do_truncate (req, ino, attr, fi);
+  else if ((valid & (FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME)) == (FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME))
+    do_utimes (req, ino, attr);
+
+  if (!valid)
+    fuse_getattr (req, ino, fi);
+}
+
+
+static int32_t
+fuse_err_cbk (call_frame_t *frame,
+	      void *cookie,
+	      xlator_t *this,
+	      int32_t op_ret,
+	      int32_t op_errno)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  if (op_ret == 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": %s => 0", frame->root->unique,
+	    state->fuse_loc.loc.path ? state->fuse_loc.loc.path : "ERR");
+    fuse_reply_err (req, 0);
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": %s => -1 (%d)", frame->root->unique,
+	    state->fuse_loc.loc.path ? state->fuse_loc.loc.path : "ERR",
+	    op_errno);
+    fuse_reply_err (req, op_errno);
+  }
+
+  if (state->fd)
+    fd_destroy (state->fd);
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+
+
+static int32_t
+fuse_unlink_cbk (call_frame_t *frame,
+		 void *cookie,
+		 xlator_t *this,
+		 int32_t op_ret,
+		 int32_t op_errno)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  if (op_ret == 0)
+    inode_unlink (state->itable, state->fuse_loc.parent, state->fuse_loc.name);
+
+  if (op_ret == 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": %s => 0", frame->root->unique,
+	    state->fuse_loc.loc.path);
+
+    fuse_reply_err (req, 0);
+  } else {
+    gf_log ("glusterfs-fuse", (op_errno == ENOTEMPTY) ? GF_LOG_DEBUG : GF_LOG_ERROR,
+	    "%"PRId64": %s => -1 (%d)", frame->root->unique,
+	    state->fuse_loc.loc.path, op_errno);
+
+    fuse_reply_err (req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+
+static void
+fuse_access (fuse_req_t req,
+	     fuse_ino_t ino,
+	     int mask)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": ACCESS %"PRId64" (%s) (fuse_loc_fill() returned NULL inode)", 
+	    req_callid (req), (int64_t)ino, state->fuse_loc.loc.path);
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  FUSE_FOP (state,
+	    fuse_err_cbk,
+	    access,
+	    &state->fuse_loc.loc,
+	    mask);
+
+  return;
+}
+
+
+
+static int32_t
+fuse_readlink_cbk (call_frame_t *frame,
+		   void *cookie,
+		   xlator_t *this,
+		   int32_t op_ret,
+		   int32_t op_errno,
+		   const char *linkname)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  if (op_ret > 0) {
+    ((char *)linkname)[op_ret] = '\0';
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": %s => %s", frame->root->unique,
+	    state->fuse_loc.loc.path, linkname);
+
+      fuse_reply_readlink(req, linkname);
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": %s => -1 (%d)", frame->root->unique,
+	    state->fuse_loc.loc.path, op_errno);
+    fuse_reply_err(req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+static void
+fuse_readlink (fuse_req_t req,
+	       fuse_ino_t ino)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64" READLINK %s/%"PRId64" (fuse_loc_fill() returned NULL inode)", 
+	    req_callid (req), state->fuse_loc.loc.path, state->fuse_loc.loc.inode->ino);
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+  
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64" READLINK %s/%"PRId64, req_callid (req),
+	  state->fuse_loc.loc.path, state->fuse_loc.loc.inode->ino);
+
+  FUSE_FOP (state,
+	    fuse_readlink_cbk,
+	    readlink,
+	    &state->fuse_loc.loc,
+	    4096);
+
+  return;
+}
+
+
+static void
+fuse_mknod (fuse_req_t req,
+	    fuse_ino_t par,
+	    const char *name,
+	    mode_t mode,
+	    dev_t rdev)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  fuse_loc_fill (&state->fuse_loc, state, par, name);
+
+  state->fuse_loc.loc.inode = dummy_inode (state->itable);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": MKNOD %s", req_callid (req),
+	  state->fuse_loc.loc.path);
+
+  FUSE_FOP (state,
+	    fuse_entry_cbk,
+	    mknod,
+	    &state->fuse_loc.loc,
+	    mode,
+	    rdev);
+
+  return;
+}
+
+
+static void 
+fuse_mkdir (fuse_req_t req,
+	    fuse_ino_t par,
+	    const char *name,
+	    mode_t mode)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  fuse_loc_fill (&state->fuse_loc, state, par, name);
+
+  state->fuse_loc.loc.inode = dummy_inode (state->itable);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": MKDIR %s", req_callid (req),
+	  state->fuse_loc.loc.path);
+
+  FUSE_FOP (state,
+	    fuse_entry_cbk,
+	    mkdir,
+	    &state->fuse_loc.loc,
+	    mode);
+
+  return;
+}
+
+
+static void 
+fuse_unlink (fuse_req_t req,
+	     fuse_ino_t par,
+	     const char *name)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": UNLINK %s", req_callid (req),
+	  state->fuse_loc.loc.path);
+
+  fuse_loc_fill (&state->fuse_loc, state, par, name);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": UNLINK %s (fuse_loc_fill() returned NULL inode)", req_callid (req),
+	    state->fuse_loc.loc.path);
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  FUSE_FOP (state,
+	    fuse_unlink_cbk,
+	    unlink,
+	    &state->fuse_loc.loc);
+
+  return;
+}
+
+
+static void 
+fuse_rmdir (fuse_req_t req,
+	    fuse_ino_t par,
+	    const char *name)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  fuse_loc_fill (&state->fuse_loc, state, par, name);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": RMDIR %s (fuse_loc_fill() returned NULL inode)", req_callid (req),
+	    state->fuse_loc.loc.path);
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": RMDIR %s", req_callid (req),
+	  state->fuse_loc.loc.path);
+
+  FUSE_FOP (state,
+	    fuse_unlink_cbk,
+	    rmdir,
+	    &state->fuse_loc.loc);
+
+  return;
+}
+
+
+static void
+fuse_symlink (fuse_req_t req,
+	      const char *linkname,
+	      fuse_ino_t par,
+	      const char *name)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  fuse_loc_fill (&state->fuse_loc, state, par, name);
+
+  state->fuse_loc.loc.inode = dummy_inode (state->itable);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": SYMLINK %s -> %s", req_callid (req),
+	  state->fuse_loc.loc.path, linkname);
+
+  FUSE_FOP (state,
+	    fuse_entry_cbk,
+	    symlink,
+	    linkname,
+	    &state->fuse_loc.loc);
+  return;
+}
+
+
+int32_t
+fuse_rename_cbk (call_frame_t *frame,
+		 void *cookie,
+		 xlator_t *this,
+		 int32_t op_ret,
+		 int32_t op_errno,
+		 struct stat *buf)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  if (op_ret == 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": %s -> %s => 0", frame->root->unique,
+	    state->fuse_loc.loc.path,
+	    state->fuse_loc2.loc.path);
+
+    inode_t *inode;
+    {
+      /* ugly ugly - to stay blind to situation where
+	 rename happens on a new inode
+      */
+      buf->st_ino = state->fuse_loc.loc.ino;
+    }
+    inode = inode_rename (state->itable,
+			  state->fuse_loc.parent,
+			  state->fuse_loc.name,
+			  state->fuse_loc2.parent,
+			  state->fuse_loc2.name,
+			  buf);
+
+    inode_unref (inode);
+    fuse_reply_err (req, 0);
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": %s -> %s => -1 (%d)", frame->root->unique,
+	    state->fuse_loc.loc.path,
+	    state->fuse_loc2.loc.path, op_errno);
+    fuse_reply_err (req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+  return 0;
+}
+
+
+static void
+fuse_rename (fuse_req_t req,
+	     fuse_ino_t oldpar,
+	     const char *oldname,
+	     fuse_ino_t newpar,
+	     const char *newname)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  fuse_loc_fill (&state->fuse_loc, state, oldpar, oldname);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "for %s %"PRId64": RENAME `%s' -> `%s' (fuse_loc_fill() returned NULL inode)",
+	    state->fuse_loc.loc.path, req_callid (req), state->fuse_loc.loc.path,
+	    state->fuse_loc2.loc.path);
+    
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  fuse_loc_fill (&state->fuse_loc2, state, newpar, newname);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": RENAME `%s' -> `%s'",
+	  req_callid (req), state->fuse_loc.loc.path,
+	  state->fuse_loc2.loc.path);
+
+  FUSE_FOP (state,
+	    fuse_rename_cbk,
+	    rename,
+	    &state->fuse_loc.loc,
+	    &state->fuse_loc2.loc);
+
+  return;
+}
+
+
+static void
+fuse_link (fuse_req_t req,
+	   fuse_ino_t ino,
+	   fuse_ino_t par,
+	   const char *name)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  fuse_loc_fill (&state->fuse_loc, state, par, name);
+  fuse_loc_fill (&state->fuse_loc2, state, ino, NULL);
+  if (!state->fuse_loc2.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "fuse_loc_fill() returned NULL inode for %s %"PRId64": LINK %s %s", 
+	    state->fuse_loc2.loc.path, req_callid (req), 
+	    state->fuse_loc2.loc.path, state->fuse_loc.loc.path);
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  state->fuse_loc.loc.inode = inode_ref (state->fuse_loc2.loc.inode);
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": LINK %s %s", req_callid (req),
+	  state->fuse_loc2.loc.path, state->fuse_loc.loc.path);
+
+  FUSE_FOP (state,
+	    fuse_entry_cbk,
+	    link,
+	    &state->fuse_loc2.loc,
+	    state->fuse_loc.loc.path);
+
+  return;
+}
+
+
+static int32_t
+fuse_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)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  struct fuse_file_info fi = {0, };
+  struct fuse_entry_param e = {0, };
+
+  fd = state->fd;
+
+  fi.flags = state->flags;
+  if (op_ret >= 0) {
+    inode_t *fuse_inode;
+    fi.fh = (unsigned long) fd;
+
+    if ((fi.flags & 3) && glusterfs_fuse_direct_io_mode)
+      fi.direct_io = 1;
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": %s => %p", frame->root->unique,
+	    state->fuse_loc.loc.path, fd);
+
+    fuse_inode = inode_update (state->itable,
+			       state->fuse_loc.parent,
+			       state->fuse_loc.name,
+			       buf);
+    if (fuse_inode->ctx) {
+      inode_unhash_name (state->itable, fuse_inode);
+      inode_unref (fuse_inode);
+
+      fuse_inode = inode_update (state->itable,
+                                 state->fuse_loc.parent,
+                                 state->fuse_loc.name,
+                                 buf);
+    }
+
+
+    {
+      if (fuse_inode->ctx != inode->ctx) {
+	dict_t *swap = inode->ctx;
+	inode->ctx = fuse_inode->ctx;
+	fuse_inode->ctx = swap;
+	fuse_inode->generation = inode->generation;
+	fuse_inode->st_mode = buf->st_mode;
+      }
+
+      inode_lookup (fuse_inode);
+
+      /*      list_del (&fd->inode_list); */
+
+      LOCK (&fuse_inode->lock);
+      list_add (&fd->inode_list, &fuse_inode->fds);
+      inode_unref (fd->inode);
+      fd->inode = inode_ref (fuse_inode);
+      UNLOCK (&fuse_inode->lock);
+
+      //      inode_destroy (inode);
+    }
+
+    inode_unref (fuse_inode);
+
+    e.ino = fuse_inode->ino;
+    e.generation = buf->st_ctime;
+    e.entry_timeout = glusterfs_fuse_entry_timeout;
+    e.attr_timeout = glusterfs_fuse_attr_timeout;
+    e.attr = *buf;
+    e.attr.st_blksize = BIG_FUSE_CHANNEL_SIZE;
+
+    fi.keep_cache = 0;
+
+    //    if (fi.flags & 1)
+    //      fi.direct_io = 1;
+
+    if (fuse_reply_create (req, &e, &fi) == -ENOENT) {
+      gf_log ("glusterfs-fuse", GF_LOG_WARNING, "create() got EINTR");
+      /* TODO: forget this node too */
+      state->req = 0;
+      FUSE_FOP_NOREPLY (state, close, fd);
+    }
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": %s => -1 (%d)", req_callid (req),
+	    state->fuse_loc.loc.path, op_errno);
+    fuse_reply_err (req, op_errno);
+    fd_destroy (fd);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+
+static void
+fuse_create (fuse_req_t req,
+	     fuse_ino_t par,
+	     const char *name,
+	     mode_t mode,
+	     struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+  fd_t *fd;
+
+  state = state_from_req (req);
+  state->flags = fi->flags;
+
+  fuse_loc_fill (&state->fuse_loc, state, par, name);
+  state->fuse_loc.loc.inode = dummy_inode (state->itable);
+
+  fd = fd_create (state->fuse_loc.loc.inode);
+  state->fd = fd;
+
+
+  LOCK (&fd->inode->lock);
+  list_del_init (&fd->inode_list);
+  UNLOCK (&fd->inode->lock);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": CREATE %s", req_callid (req),
+	  state->fuse_loc.loc.path);
+
+  FUSE_FOP (state,
+	    fuse_create_cbk,
+	    create,
+	    &state->fuse_loc.loc,
+	    state->flags,
+	    mode, fd);
+
+  return;
+}
+
+
+static void
+fuse_open (fuse_req_t req,
+	   fuse_ino_t ino,
+	   struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+  fd_t *fd;
+
+  state = state_from_req (req);
+  state->flags = fi->flags;
+
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": OPEN %s (fuse_loc_fill() returned NULL inode)", req_callid (req),
+	    state->fuse_loc.loc.path);
+  
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+
+  fd = fd_create (state->fuse_loc.loc.inode);
+  state->fd = fd;
+
+  LOCK (&fd->inode->lock);
+  list_del_init (&fd->inode_list);
+  UNLOCK (&fd->inode->lock);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": OPEN %s", req_callid (req),
+	  state->fuse_loc.loc.path);
+
+  FUSE_FOP (state,
+	    fuse_fd_cbk,
+	    open,
+	    &state->fuse_loc.loc,
+	    fi->flags, fd);
+
+  return;
+}
+
+
+static int32_t
+fuse_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 *stbuf)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  if (op_ret >= 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": READ => %d/%d,%"PRId64"/%"PRId64, frame->root->unique,
+	    op_ret, state->size, state->off, stbuf->st_size);
+
+    fuse_reply_vec (req, vector, count);
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": READ => -1 (%d)", frame->root->unique, op_errno);
+
+    fuse_reply_err (req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+static void
+fuse_readv (fuse_req_t req,
+	    fuse_ino_t ino,
+	    size_t size,
+	    off_t off,
+	    struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  state->size = size;
+  state->off = off;
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": READ (%p, size=%d, offset=%"PRId64")",
+	  req_callid (req), FI_TO_FD (fi), size, off);
+
+  FUSE_FOP (state,
+	    fuse_readv_cbk,
+	    readv,
+	    FI_TO_FD (fi),
+	    size,
+	    off);
+
+}
+
+
+static int32_t
+fuse_writev_cbk (call_frame_t *frame,
+		 void *cookie,
+		 xlator_t *this,
+		 int32_t op_ret,
+		 int32_t op_errno,
+		 struct stat *stbuf)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  if (op_ret >= 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": WRITE => %d/%d,%"PRId64"/%"PRId64, frame->root->unique,
+	    op_ret, state->size, state->off, stbuf->st_size);
+
+    fuse_reply_write (req, op_ret);
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": WRITE => -1 (%d)", frame->root->unique, op_errno);
+
+    fuse_reply_err (req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+
+static void
+fuse_write (fuse_req_t req,
+	    fuse_ino_t ino,
+	    const char *buf,
+	    size_t size,
+	    off_t off,
+	    struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+  struct iovec vector;
+
+  state = state_from_req (req);
+  state->size = size;
+  state->off = off;
+
+  vector.iov_base = (void *)buf;
+  vector.iov_len = size;
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": WRITE (%p, size=%d, offset=%"PRId64")",
+	  req_callid (req), FI_TO_FD (fi), size, off);
+
+  FUSE_FOP (state,
+	    fuse_writev_cbk,
+	    writev,
+	    FI_TO_FD (fi),
+	    &vector,
+	    1,
+	    off);
+  return;
+}
+
+
+static void
+fuse_flush (fuse_req_t req,
+	    fuse_ino_t ino,
+	    struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": FLUSH %p", req_callid (req), FI_TO_FD (fi));
+
+  FUSE_FOP (state,
+	    fuse_err_cbk,
+	    flush,
+	    FI_TO_FD (fi));
+
+  return;
+}
+
+
+static void 
+fuse_release (fuse_req_t req,
+	      fuse_ino_t ino,
+	      struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  state->fd = FI_TO_FD (fi);
+
+  LOCK (&state->fd->inode->lock);
+  list_del_init (&state->fd->inode_list);
+  UNLOCK (&state->fd->inode->lock);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": CLOSE %p", req_callid (req), FI_TO_FD (fi));
+
+  FUSE_FOP (state, fuse_err_cbk, close, state->fd);
+  return;
+}
+
+
+static void 
+fuse_fsync (fuse_req_t req,
+	    fuse_ino_t ino,
+	    int datasync,
+	    struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": FSYNC %p", req_callid (req), FI_TO_FD (fi));
+
+  FUSE_FOP (state,
+	    fuse_err_cbk,
+	    fsync,
+	    FI_TO_FD (fi),
+	    datasync);
+
+  return;
+}
+
+static void
+fuse_opendir (fuse_req_t req,
+	      fuse_ino_t ino,
+	      struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+  fd_t *fd;
+
+  state = state_from_req (req);
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": OPEN %s (fuse_loc_fill() returned NULL inode)", req_callid (req),
+	    state->fuse_loc.loc.path);
+  
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+
+  fd = fd_create (state->fuse_loc.loc.inode);
+  state->fd = fd;
+
+  LOCK (&fd->inode->lock);
+  list_del_init (&fd->inode_list);
+  UNLOCK (&fd->inode->lock);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": OPEN %s", req_callid (req),
+	  state->fuse_loc.loc.path);
+
+  FUSE_FOP (state,
+	    fuse_fd_cbk,
+	    opendir,
+	    &state->fuse_loc.loc, fd);
+}
+
+#if 0
+
+void
+fuse_dir_reply (fuse_req_t req,
+		size_t size,
+		off_t off,
+		fd_t *fd)
+{
+  char *buf;
+  size_t size_limited;
+  data_t *buf_data;
+
+  buf_data = dict_get (fd->ctx, "__fuse__getdents__internal__@@!!");
+  buf = buf_data->data;
+  size_limited = size;
+
+  if (size_limited > (buf_data->len - off))
+    size_limited = (buf_data->len - off);
+
+  if (off > buf_data->len) {
+    size_limited = 0;
+    off = 0;
+  }
+
+  fuse_reply_buf (req, buf + off, size_limited);
+}
+
+
+static int32_t
+fuse_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)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  if (op_ret < 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": READDIR => -1 (%d)",
+	    frame->root->unique, op_errno);
+
+    fuse_reply_err (state->req, op_errno);
+  } else {
+    dir_entry_t *trav;
+    size_t size = 0;
+    char *buf;
+    data_t *buf_data;
+
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": READDIR => %d entries",
+	    frame->root->unique, count);
+
+    for (trav = entries->next; trav; trav = trav->next) {
+      size += fuse_add_direntry (req, NULL, 0, trav->name, NULL, 0);
+    }
+
+    buf = CALLOC (1, size);
+    ERR_ABORT (buf);
+    buf_data = data_from_dynptr (buf, size);
+    size = 0;
+
+    for (trav = entries->next; trav; trav = trav->next) {
+      size_t entry_size;
+      entry_size = fuse_add_direntry (req, NULL, 0, trav->name, NULL, 0);
+      fuse_add_direntry (req, buf + size, entry_size, trav->name,
+			 &trav->buf, entry_size + size);
+      size += entry_size;
+    }
+
+    dict_set (state->fd->ctx,
+	      "__fuse__getdents__internal__@@!!",
+	      buf_data);
+
+    fuse_dir_reply (state->req, state->size, state->off, state->fd);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+static void
+fuse_getdents (fuse_req_t req,
+	       fuse_ino_t ino,
+	       struct fuse_file_info *fi,
+	       size_t size,
+	       off_t off,
+	       int32_t flag)
+{
+  fuse_state_t *state;
+  fd_t *fd = FI_TO_FD (fi);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": GETDENTS %p", req_callid (req), FI_TO_FD (fi));
+
+  if (!off)
+    dict_del (fd->ctx, "__fuse__getdents__internal__@@!!");
+
+  if (dict_get (fd->ctx, "__fuse__getdents__internal__@@!!")) {
+    fuse_dir_reply (req, size, off, fd);
+    return;
+  }
+
+  state = state_from_req (req);
+
+  state->size = size;
+  state->off = off;
+  state->fd = fd;
+
+  FUSE_FOP (state,
+	    fuse_getdents_cbk,
+	    getdents,
+	    fd,
+	    size,
+	    off,
+	    0);
+}
+
+#endif
+
+static int32_t
+fuse_readdir_cbk (call_frame_t *frame,
+		  void *cookie,
+		  xlator_t *this,
+		  int32_t op_ret,
+		  int32_t op_errno,
+		  gf_dirent_t *buf)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  if (op_ret >= 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": READDIR => %d/%d,%"PRId64, frame->root->unique,
+	    op_ret, state->size, state->off);
+
+    fuse_reply_buf (req, (void *)buf, op_ret);
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": READDIR => -1 (%d)", frame->root->unique, op_errno);
+
+    fuse_reply_err (req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+
+}
+
+static void
+fuse_readdir (fuse_req_t req,
+	      fuse_ino_t ino,
+	      size_t size,
+	      off_t off,
+	      struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  state->size = size;
+  state->off = off;
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": READDIR (%p, size=%d, offset=%"PRId64")",
+	  req_callid (req), FI_TO_FD (fi), size, off);
+
+  FUSE_FOP (state,
+	    fuse_readdir_cbk,
+	    readdir,
+	    FI_TO_FD (fi),
+	    size,
+	    off);
+}
+
+
+static void
+fuse_releasedir (fuse_req_t req,
+		 fuse_ino_t ino,
+		 struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  state->fd = FI_TO_FD (fi);
+
+  LOCK (&state->fd->inode->lock);
+  list_del_init (&state->fd->inode_list);
+  UNLOCK (&state->fd->inode->lock);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": CLOSEDIR %p", req_callid (req), FI_TO_FD (fi));
+
+  FUSE_FOP (state, fuse_err_cbk, closedir, state->fd);
+}
+
+
+static void 
+fuse_fsyncdir (fuse_req_t req,
+	       fuse_ino_t ino,
+	       int datasync,
+	       struct fuse_file_info *fi)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+
+  FUSE_FOP (state,
+	    fuse_err_cbk,
+	    fsyncdir,
+	    FI_TO_FD (fi),
+	    datasync);
+
+  return;
+}
+
+
+static int32_t
+fuse_statfs_cbk (call_frame_t *frame,
+		 void *cookie,
+		 xlator_t *this,
+		 int32_t op_ret,
+		 int32_t op_errno,
+		 struct statvfs *buf)
+{
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  /*
+    Filesystems (like ZFS on solaris) reports
+    different ->f_frsize and ->f_bsize. Old coreutils
+    df tools use statfs() and do not see ->f_frsize.
+    the ->f_blocks, ->f_bavail and ->f_bfree are
+    w.r.t ->f_frsize and not ->f_bsize which makes the
+    df tools report wrong values.
+
+    Scale the block counts to match ->f_bsize.
+  */
+  /* TODO: with old coreutils, f_bsize is taken from stat()'s st_blksize
+   * so the df with old coreutils this wont work :(
+   */
+
+  if (op_ret == 0) {
+
+    buf->f_blocks *= buf->f_frsize;
+    buf->f_blocks /= BIG_FUSE_CHANNEL_SIZE;
+
+    buf->f_bavail *= buf->f_frsize;
+    buf->f_bavail /= BIG_FUSE_CHANNEL_SIZE;
+
+    buf->f_bfree *= buf->f_frsize;
+    buf->f_bfree /= BIG_FUSE_CHANNEL_SIZE;
+
+    buf->f_frsize = buf->f_bsize = BIG_FUSE_CHANNEL_SIZE;
+
+    fuse_reply_statfs (req, buf);
+
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": ERR => -1 (%d)", frame->root->unique, op_errno);
+    fuse_reply_err (req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+
+static void
+fuse_statfs (fuse_req_t req,
+	     fuse_ino_t ino)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  fuse_loc_fill (&state->fuse_loc, state, 1, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": STATFS (fuse_loc_fill() returned NULL inode)", req_callid (req));
+    
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": STATFS", req_callid (req));
+
+  FUSE_FOP (state,
+	    fuse_statfs_cbk,
+	    statfs,
+	    &state->fuse_loc.loc);
+}
+
+static void
+fuse_setxattr (fuse_req_t req,
+	       fuse_ino_t ino,
+	       const char *name,
+	       const char *value,
+	       size_t size,
+	       int flags)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  state->size = size;
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": SETXATTR %s/%"PRId64" (%s) (fuse_loc_fill() returned NULL inode)", 
+	    req_callid (req),
+	    state->fuse_loc.loc.path, (int64_t)ino, name);
+
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  state->dict = get_new_dict ();
+
+  dict_set (state->dict, (char *)name,
+	    bin_to_data ((void *)value, size));
+  dict_ref (state->dict);
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": SETXATTR %s/%"PRId64" (%s)", req_callid (req),
+	  state->fuse_loc.loc.path, (int64_t)ino, name);
+
+  FUSE_FOP (state,
+	    fuse_err_cbk,
+	    setxattr,
+	    &state->fuse_loc.loc,
+	    state->dict,
+	    flags);
+
+  return;
+}
+
+
+static int32_t
+fuse_xattr_cbk (call_frame_t *frame,
+		void *cookie,
+		xlator_t *this,
+		int32_t op_ret,
+		int32_t op_errno,
+		dict_t *dict)
+{
+  int32_t ret = op_ret;
+  char *value = "";
+  fuse_state_t *state = frame->root->state;
+  fuse_req_t req = state->req;
+
+  if (ret >= 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": %s => %d", frame->root->unique,
+	    state->fuse_loc.loc.path, op_ret);
+
+    /* if successful */
+    if (state->name) {
+      /* if callback for getxattr */
+      data_t *value_data = dict_get (dict, state->name);
+      if (value_data) {
+	ret = value_data->len; /* Don't return the value for '\0' */
+	value = value_data->data;
+	
+	if (state->size) {
+	  /* if callback for getxattr and asks for value */
+	  fuse_reply_buf (req, value, ret);
+	} else {
+	  /* if callback for getxattr and asks for value length only */
+	  fuse_reply_xattr (req, ret);
+	}
+      } else {
+	fuse_reply_err (req, ENODATA);
+      }
+    } else {
+      /* if callback for listxattr */
+      int32_t len = 0;
+      data_pair_t *trav = dict->members_list;
+      while (trav) {
+	len += strlen (trav->key) + 1;
+	trav = trav->next;
+      }
+      value = alloca (len + 1);
+      ERR_ABORT (value);
+      len = 0;
+      trav = dict->members_list;
+      while (trav) {
+	strcpy (value + len, trav->key);
+	value[len + strlen(trav->key)] = '\0';
+	len += strlen (trav->key) + 1;
+	trav = trav->next;
+      }
+      if (state->size) {
+	/* if callback for listxattr and asks for list of keys */
+	fuse_reply_buf (req, value, len);
+      } else {
+	/* if callback for listxattr and asks for length of keys only */
+	fuse_reply_xattr (req, len);
+      }
+    }
+  } else {
+    /* if failure - no need to check if listxattr or getxattr */
+    if (op_errno != ENODATA) {
+      gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	      "%"PRId64": %s => -1 (%d)", frame->root->unique,
+	      state->fuse_loc.loc.path, op_errno);
+    } else {
+      gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	      "%"PRId64": %s => -1 (%d)", frame->root->unique,
+	      state->fuse_loc.loc.path, op_errno);
+    }
+
+    fuse_reply_err (req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+
+static void
+fuse_getxattr (fuse_req_t req,
+	       fuse_ino_t ino,
+	       const char *name,
+	       size_t size)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  state->size = size;
+  state->name = strdup (name);
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": GETXATTR %s/%"PRId64" (%s) (fuse_loc_fill() returned NULL inode)", 
+	    req_callid (req), state->fuse_loc.loc.path, (int64_t)ino, name);
+
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": GETXATTR %s/%"PRId64" (%s)", req_callid (req),
+	  state->fuse_loc.loc.path, (int64_t)ino, name);
+
+  FUSE_FOP (state,
+	    fuse_xattr_cbk,
+	    getxattr,
+	    &state->fuse_loc.loc);
+
+  return;
+}
+
+
+static void
+fuse_listxattr (fuse_req_t req,
+		fuse_ino_t ino,
+		size_t size)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  state->size = size;
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": LISTXATTR %s/%"PRId64" (fuse_loc_fill() returned NULL inode)", 
+	    req_callid (req), state->fuse_loc.loc.path, (int64_t)ino);
+
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": LISTXATTR %s/%"PRId64, req_callid (req),
+	  state->fuse_loc.loc.path, (int64_t)ino);
+
+  FUSE_FOP (state,
+	    fuse_xattr_cbk,
+	    getxattr,
+	    &state->fuse_loc.loc);
+
+  return;
+}
+
+
+static void
+fuse_removexattr (fuse_req_t req,
+		  fuse_ino_t ino,
+		  const char *name)
+
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  fuse_loc_fill (&state->fuse_loc, state, ino, NULL);
+  if (!state->fuse_loc.loc.inode) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": REMOVEXATTR %s/%"PRId64" (%s) (fuse_loc_fill() returned NULL inode)",
+	    req_callid (req), state->fuse_loc.loc.path, (int64_t)ino, name);
+
+    fuse_reply_err (req, EINVAL);
+    return;
+  }
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": REMOVEXATTR %s/%"PRId64" (%s)", req_callid (req),
+	  state->fuse_loc.loc.path, (int64_t)ino, name);
+
+  FUSE_FOP (state,
+	    fuse_err_cbk,
+	    removexattr,
+	    &state->fuse_loc.loc,
+	    name);
+
+  return;
+}
+
+static int32_t
+fuse_getlk_cbk (call_frame_t *frame,
+		void *cookie,
+		xlator_t *this,
+		int32_t op_ret,
+		int32_t op_errno,
+		struct flock *lock)
+{
+  fuse_state_t *state = frame->root->state;
+
+  if (op_ret == 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": ERR => 0", frame->root->unique);
+    fuse_reply_lock (state->req, lock);
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": ERR => -1 (%d)", frame->root->unique, op_errno);
+    fuse_reply_err (state->req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+static void
+fuse_getlk (fuse_req_t req,
+	    fuse_ino_t ino,
+	    struct fuse_file_info *fi,
+	    struct flock *lock)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  state->req = req;
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": GETLK %p", req_callid (req), FI_TO_FD (fi));
+
+  FUSE_FOP (state,
+	    fuse_getlk_cbk,
+	    lk,
+	    FI_TO_FD (fi),
+	    F_GETLK,
+	    lock);
+
+  return;
+}
+
+static int32_t
+fuse_setlk_cbk (call_frame_t *frame,
+		void *cookie,
+		xlator_t *this,
+		int32_t op_ret,
+		int32_t op_errno,
+		struct flock *lock)
+{
+  fuse_state_t *state = frame->root->state;
+
+  if (op_ret == 0) {
+    gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	    "%"PRId64": ERR => 0", frame->root->unique);
+    fuse_reply_err (state->req, 0);
+  } else {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR,
+	    "%"PRId64": ERR => -1 (%d)", frame->root->unique, op_errno);
+    fuse_reply_err (state->req, op_errno);
+  }
+
+  free_state (state);
+  STACK_DESTROY (frame->root);
+
+  return 0;
+}
+
+static void
+fuse_setlk (fuse_req_t req,
+	    fuse_ino_t ino,
+	    struct fuse_file_info *fi,
+	    struct flock *lock,
+	    int sleep)
+{
+  fuse_state_t *state;
+
+  state = state_from_req (req);
+  state->req = req;
+
+  gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
+	  "%"PRId64": SETLK %p (sleep=%d)", req_callid (req), FI_TO_FD (fi),
+	  sleep);
+
+  FUSE_FOP (state,
+	    fuse_setlk_cbk,
+	    lk,
+	    FI_TO_FD(fi),
+	    (sleep ? F_SETLKW : F_SETLK),
+	    lock);
+
+  return;
+}
+
+
+int32_t
+fuse_forget_notify (call_frame_t *frame, xlator_t *this,
+		    inode_t *inode)
+{
+  return 0;
+}
+
+struct xlator_fops fuse_xl_fops = {
+  .forget = fuse_forget_notify
+};
+
+static void
+fuse_init (void *data, struct fuse_conn_info *conn)
+{
+  transport_t *trans = data;
+  struct fuse_private *priv = trans->private;
+  xlator_t *xl = trans->xl;
+  int32_t ret;
+
+  xl->name = "fuse";
+  xl->fops = &fuse_xl_fops;
+  xl->itable = inode_table_new (0, xl);
+  xl->notify = default_notify;
+  ret = xlator_tree_init (xl);
+  if (ret == 0) {
+
+  } else {
+    fuse_unmount (priv->mountpoint, priv->ch);
+    exit (1);
+  }
+}
+
+
+static void
+fuse_destroy (void *data)
+{
+
+}
+
+struct fuse_lowlevel_ops fuse_ops = {
+  .init         = fuse_init,
+  .destroy      = fuse_destroy,
+  .lookup       = fuse_lookup,
+  .forget       = fuse_forget,
+  .getattr      = fuse_getattr,
+  .setattr      = fuse_setattr,
+  .opendir      = fuse_opendir,
+  .readdir      = fuse_readdir,
+  .releasedir   = fuse_releasedir,
+  .access       = fuse_access,
+  .readlink     = fuse_readlink,
+  .mknod        = fuse_mknod,
+  .mkdir        = fuse_mkdir,
+  .unlink       = fuse_unlink,
+  .rmdir        = fuse_rmdir,
+  .symlink      = fuse_symlink,
+  .rename       = fuse_rename,
+  .link         = fuse_link,
+  .create       = fuse_create,
+  .open         = fuse_open,
+  .read         = fuse_readv,
+  .write        = fuse_write,
+  .flush        = fuse_flush,
+  .release      = fuse_release,
+  .fsync        = fuse_fsync,
+  .fsyncdir     = fuse_fsyncdir,
+  .statfs       = fuse_statfs,
+  .setxattr     = fuse_setxattr,
+  .getxattr     = fuse_getxattr,
+  .listxattr    = fuse_listxattr,
+  .removexattr  = fuse_removexattr,
+  .getlk        = fuse_getlk,
+  .setlk        = fuse_setlk
+};
+
+
+static int32_t
+fuse_transport_disconnect (transport_t *this)
+{
+  struct fuse_private *priv = this->private;
+
+  gf_log ("glusterfs-fuse",
+	  GF_LOG_DEBUG,
+	  "cleaning up fuse transport in disconnect handler");
+
+  fuse_session_remove_chan (priv->ch);
+  fuse_session_destroy (priv->se);
+  fuse_unmount (priv->mountpoint, priv->ch);
+
+  FREE (priv);
+  priv = NULL;
+  this->private = NULL;
+
+  /* TODO: need graceful exit. every xlator should be ->fini()'ed
+     and come out of main poll loop cleanly
+  */
+  exit (0);
+
+  return -1;
+}
+
+
+static int32_t
+fuse_transport_init (transport_t *this,
+		     dict_t *options,
+		     event_notify_fn_t notify)
+{
+  char *mountpoint = strdup (data_to_str (dict_get (options, 
+						    "mountpoint")));
+  char *source;
+  asprintf (&source, "fsname=glusterfs");
+  char *argv[] = { "glusterfs",
+
+#ifndef GF_DARWIN_HOST_OS
+                   "-o", "nonempty",
+#endif
+                   "-o", "allow_other",
+                   "-o", "default_permissions",
+		   "-o", source,
+		   "-o", "max_readahead=1048576",
+		   "-o", "max_read=1048576",
+		   "-o", "max_write=1048576",
+                   NULL };
+#ifdef GF_DARWIN_HOST_OS
+  int argc = 13;
+#else
+  int argc = 15;
+#endif
+
+  struct fuse_args args = FUSE_ARGS_INIT(argc,
+					 argv);
+  struct fuse_private *priv = NULL;
+  int32_t res;
+
+  priv = CALLOC (1, sizeof (*priv));
+  ERR_ABORT (priv);
+
+
+  this->notify = notify;
+  this->private = (void *)priv;
+
+  priv->ch = fuse_mount (mountpoint, &args);
+  if (!priv->ch) {
+    gf_log ("glusterfs-fuse",
+	    GF_LOG_ERROR, "fuse_mount failed (%s)\n", strerror (errno));
+    fuse_opt_free_args(&args);
+    goto err_free;
+  }
+
+  priv->se = fuse_lowlevel_new (&args, &fuse_ops, sizeof (fuse_ops), this);
+  fuse_opt_free_args(&args);
+
+  res = fuse_set_signal_handlers (priv->se);
+  if (res == -1) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR, "fuse_set_signal_handlers failed");
+    goto err;
+  }
+
+  fuse_session_add_chan (priv->se, priv->ch);
+
+  priv->fd = fuse_chan_fd (priv->ch);
+  this->buf = data_ref (data_from_dynptr (NULL, 0));
+  this->buf->is_locked = 1;
+
+  priv->mountpoint = mountpoint;
+
+  transport_ref (this);
+  //poll_register (this->xl_private, priv->fd, this);
+
+  return 0;
+
+ err: 
+    fuse_unmount (mountpoint, priv->ch);
+ err_free:
+    FREE (mountpoint);
+    mountpoint = NULL;
+  return -1;
+}
+
+void
+guts_log_req (void *, int32_t);
+
+static void *
+fuse_thread_proc (void *data)
+{
+  transport_t *trans = data;
+  struct fuse_private *priv = trans->private;
+  int32_t res = 0;
+  data_t *buf = trans->buf;
+  int32_t ref = 0;
+  size_t chan_size = fuse_chan_bufsize (priv->ch);
+  char *recvbuf = CALLOC (1, chan_size);
+  ERR_ABORT (recvbuf);
+
+  while (!fuse_session_exited (priv->se)) {
+    int32_t fuse_chan_receive (struct fuse_chan * ch,
+			       char *buf,
+			       int32_t size);
+
+
+    res = fuse_chan_receive (priv->ch,
+			     recvbuf,
+			     chan_size);
+
+    if (res == -1) {
+      transport_disconnect (trans);
+    }
+
+    buf = trans->buf;
+
+    if (res && res != -1) {
+      if (buf->len < (res)) {
+	if (buf->data) {
+	  FREE (buf->data);
+	  buf->data = NULL;
+	}
+	buf->data = CALLOC (1, res);
+	ERR_ABORT (buf->data);
+	buf->len = res;
+      }
+      memcpy (buf->data, recvbuf, res); // evil evil
+      guts_log_req (buf->data, res);
+      fuse_session_process (priv->se,
+			    buf->data,
+			    res,
+			    priv->ch);
+    }
+
+    LOCK (&buf->lock);
+    ref = buf->refcount;
+    UNLOCK (&buf->lock);
+    if (1) {
+      data_unref (buf);
+
+      trans->buf = data_ref (data_from_dynptr (NULL, 0));
+      trans->buf->is_locked = 1;
+    }
+  }
+
+  exit (0);
+
+  return NULL;
+}
+
+
+static int32_t
+fuse_transport_notify (xlator_t *xl,
+		       int32_t event,
+		       void *data,
+		       ...)
+{
+  transport_t *trans = data;
+  struct fuse_private *priv = trans->private;
+  int32_t res = 0;
+  data_t *buf;
+  int32_t ref = 0;
+
+  if (event == GF_EVENT_POLLERR) {
+    gf_log ("glusterfs-fuse", GF_LOG_ERROR, "got GF_EVENT_POLLERR");
+    transport_disconnect (trans);
+    return -1;
+  }
+
+  if (event != GF_EVENT_POLLIN) {
+    gf_log ("glusterfs-fuse", GF_LOG_WARNING, "Ignoring notify event %d",
+	    event);
+    return 0;
+  }
+
+  if (!fuse_session_exited(priv->se)) {
+    static size_t chan_size = 0;
+
+    int32_t fuse_chan_receive (struct fuse_chan * ch,
+			       char *buf,
+			       int32_t size);
+    if (!chan_size)
+      chan_size = fuse_chan_bufsize (priv->ch) ;
+
+    buf = trans->buf;
+
+    if (!buf->data) {
+      buf->data = MALLOC (chan_size);
+      ERR_ABORT (buf->data);
+      buf->len = chan_size;
+    }
+
+    res = fuse_chan_receive (priv->ch,
+			     buf->data,
+			     chan_size);
+    /*    if (res == -1) {
+      transport_destroy (trans);
+    */
+    if (res && res != -1) {
+      /* trace the request and log it to tio file */
+      guts_log_req (buf->data, res);
+      fuse_session_process (priv->se,
+			    buf->data,
+			    res,
+			    priv->ch);
+    }
+
+    LOCK (&buf->lock);
+    ref = buf->refcount;
+    UNLOCK (&buf->lock);
+    /* TODO do the check with a lock */
+    if (ref > 1) {
+      data_unref (buf);
+
+      //      trans->buf = data_ref (data_from_dynptr (malloc (fuse_chan_bufsize (priv->ch)),
+      trans->buf = data_ref (data_from_dynptr (NULL, 0));
+      trans->buf->data = MALLOC (chan_size);
+      ERR_ABORT (trans->buf->data);
+      trans->buf->len = chan_size;
+      trans->buf->is_locked = 1;
+    }
+  } else {
+    transport_disconnect (trans);
+  }
+
+  /*
+  if (fuse_session_exited (priv->se)) {
+    transport_destroy (trans);
+    res = -1;
+    }*/
+
+  return res >= 0 ? 0 : res;
+}
+
+static void
+fuse_transport_fini (transport_t *this)
+{
+
+}
+
+static struct transport_ops fuse_transport_ops = {
+  .disconnect = fuse_transport_disconnect,
+};
+
+static transport_t fuse_transport = {
+  .ops = &fuse_transport_ops,
+  .private = NULL,
+  .xl = NULL,
+  .init = fuse_transport_init,
+  .fini = fuse_transport_fini,
+  .notify = fuse_transport_notify
+};
+
+
+transport_t *
+glusterfs_mount (glusterfs_ctx_t *ctx,
+		 const char *mount_point)
+{
+  dict_t *options = get_new_dict ();
+  transport_t *new_fuse = CALLOC (1, sizeof (*new_fuse));
+  ERR_ABORT (new_fuse);
+
+  memcpy (new_fuse, &fuse_transport, sizeof (*new_fuse));
+  new_fuse->ops = &fuse_transport_ops;
+  new_fuse->xl_private = ctx;
+
+  dict_set (options,
+	    "mountpoint", 
+	    str_to_data ((char *)mount_point));
+
+  return (new_fuse->init (new_fuse,
+			  options,
+			  fuse_transport_notify) == 0 ? new_fuse : NULL);
+}
+
+int32_t
+fuse_thread (pthread_t *thread, void *data)
+{
+  return pthread_create (thread, NULL, fuse_thread_proc, data);
+}
+
+