/*
  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
  This file is part of GlusterFS.

  This file is licensed to you under your choice of the GNU Lesser
  General Public License, version 3 or any later version (LGPLv3 or
  later), or the GNU General Public License, version 2 (GPLv2), in all
  cases as published by the Free Software Foundation.
*/

#include <openssl/md5.h>
#include <inttypes.h>

#include "glusterfs/call-stub.h"
#include "glusterfs/mem-types.h"
#include "glusterfs/libglusterfs-messages.h"

static call_stub_t *
stub_new(call_frame_t *frame, const uint32_t wind, const glusterfs_fop_t fop)
{
    call_stub_t *new = NULL;

    new = GF_CALLOC(1, sizeof(call_stub_t), gf_common_mt_char);
    GF_VALIDATE_OR_GOTO("call-stub", new, out);

    INIT_LIST_HEAD(&new->list);
    new->frame = frame;
    new->fop = fop;
    new->wind = wind;

    INIT_LIST_HEAD(&new->args_cbk.entries);
out:
    return new;
}

call_stub_t *
fop_lookup_stub(call_frame_t *frame, fop_lookup_t fn, loc_t *loc, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_LOOKUP);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.lookup = fn;
    args_lookup_store(&stub->args, loc, xdata);
out:
    return stub;
}

call_stub_t *
fop_lookup_cbk_stub(call_frame_t *frame, fop_lookup_cbk_t fn, int32_t op_ret,
                    int32_t op_errno, inode_t *inode, struct iatt *buf,
                    dict_t *xdata, struct iatt *postparent)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_LOOKUP);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.lookup = fn;
    args_lookup_cbk_store(&stub->args_cbk, op_ret, op_errno, inode, buf, xdata,
                          postparent);
out:
    return stub;
}

call_stub_t *
fop_stat_stub(call_frame_t *frame, fop_stat_t fn, loc_t *loc, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_STAT);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.stat = fn;
    args_stat_store(&stub->args, loc, xdata);
out:
    return stub;
}

call_stub_t *
fop_stat_cbk_stub(call_frame_t *frame, fop_stat_cbk_t fn, int32_t op_ret,
                  int32_t op_errno, struct iatt *buf, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_STAT);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.stat = fn;
    args_stat_cbk_store(&stub->args_cbk, op_ret, op_errno, buf, xdata);
out:
    return stub;
}

call_stub_t *
fop_fstat_stub(call_frame_t *frame, fop_fstat_t fn, fd_t *fd, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_FSTAT);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fstat = fn;
    args_fstat_store(&stub->args, fd, xdata);
out:
    return stub;
}

call_stub_t *
fop_fstat_cbk_stub(call_frame_t *frame, fop_fstat_cbk_t fn, int32_t op_ret,
                   int32_t op_errno, struct iatt *buf, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FSTAT);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fstat = fn;
    args_fstat_cbk_store(&stub->args_cbk, op_ret, op_errno, buf, xdata);
out:
    return stub;
}

call_stub_t *
fop_truncate_stub(call_frame_t *frame, fop_truncate_t fn, loc_t *loc, off_t off,
                  dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_TRUNCATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.truncate = fn;
    args_truncate_store(&stub->args, loc, off, xdata);
out:
    return stub;
}

call_stub_t *
fop_truncate_cbk_stub(call_frame_t *frame, fop_truncate_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
                      struct iatt *postbuf, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_TRUNCATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.truncate = fn;
    args_truncate_cbk_store(&stub->args_cbk, op_ret, op_errno, prebuf, postbuf,
                            xdata);
out:
    return stub;
}

call_stub_t *
fop_ftruncate_stub(call_frame_t *frame, fop_ftruncate_t fn, fd_t *fd, off_t off,
                   dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_FTRUNCATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.ftruncate = fn;
    args_ftruncate_store(&stub->args, fd, off, xdata);

out:
    return stub;
}

call_stub_t *
fop_ftruncate_cbk_stub(call_frame_t *frame, fop_ftruncate_cbk_t fn,
                       int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
                       struct iatt *postbuf, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FTRUNCATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.ftruncate = fn;
    args_ftruncate_cbk_store(&stub->args_cbk, op_ret, op_errno, prebuf, postbuf,
                             xdata);

out:
    return stub;
}

call_stub_t *
fop_access_stub(call_frame_t *frame, fop_access_t fn, loc_t *loc, int32_t mask,
                dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_ACCESS);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.access = fn;
    args_access_store(&stub->args, loc, mask, xdata);
out:
    return stub;
}

call_stub_t *
fop_access_cbk_stub(call_frame_t *frame, fop_access_cbk_t fn, int32_t op_ret,
                    int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_ACCESS);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.access = fn;
    args_access_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_readlink_stub(call_frame_t *frame, fop_readlink_t fn, loc_t *loc,
                  size_t size, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_READLINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.readlink = fn;
    args_readlink_store(&stub->args, loc, size, xdata);
out:
    return stub;
}

call_stub_t *
fop_readlink_cbk_stub(call_frame_t *frame, fop_readlink_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, const char *path,
                      struct iatt *stbuf, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_READLINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.readlink = fn;
    args_readlink_cbk_store(&stub->args_cbk, op_ret, op_errno, path, stbuf,
                            xdata);
out:
    return stub;
}

call_stub_t *
fop_mknod_stub(call_frame_t *frame, fop_mknod_t fn, loc_t *loc, mode_t mode,
               dev_t rdev, mode_t umask, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_MKNOD);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.mknod = fn;
    args_mknod_store(&stub->args, loc, mode, rdev, umask, xdata);
out:
    return stub;
}

call_stub_t *
fop_mknod_cbk_stub(call_frame_t *frame, fop_mknod_cbk_t fn, int32_t op_ret,
                   int32_t op_errno, inode_t *inode, struct iatt *buf,
                   struct iatt *preparent, struct iatt *postparent,
                   dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_MKNOD);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.mknod = fn;
    args_mknod_cbk_store(&stub->args_cbk, op_ret, op_errno, inode, buf,
                         preparent, postparent, xdata);
out:
    return stub;
}

call_stub_t *
fop_mkdir_stub(call_frame_t *frame, fop_mkdir_t fn, loc_t *loc, mode_t mode,
               mode_t umask, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_MKDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.mkdir = fn;
    args_mkdir_store(&stub->args, loc, mode, umask, xdata);
out:
    return stub;
}

call_stub_t *
fop_mkdir_cbk_stub(call_frame_t *frame, fop_mkdir_cbk_t fn, int32_t op_ret,
                   int32_t op_errno, inode_t *inode, struct iatt *buf,
                   struct iatt *preparent, struct iatt *postparent,
                   dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_MKDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.mkdir = fn;
    args_mkdir_cbk_store(&stub->args_cbk, op_ret, op_errno, inode, buf,
                         preparent, postparent, xdata);
out:
    return stub;
}

call_stub_t *
fop_unlink_stub(call_frame_t *frame, fop_unlink_t fn, loc_t *loc, int xflag,
                dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_UNLINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.unlink = fn;
    args_unlink_store(&stub->args, loc, xflag, xdata);

out:
    return stub;
}

call_stub_t *
fop_unlink_cbk_stub(call_frame_t *frame, fop_unlink_cbk_t fn, int32_t op_ret,
                    int32_t op_errno, struct iatt *preparent,
                    struct iatt *postparent, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_UNLINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.unlink = fn;
    args_unlink_cbk_store(&stub->args_cbk, op_ret, op_errno, preparent,
                          postparent, xdata);
out:
    return stub;
}

call_stub_t *
fop_rmdir_stub(call_frame_t *frame, fop_rmdir_t fn, loc_t *loc, int flags,
               dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_RMDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.rmdir = fn;
    args_rmdir_store(&stub->args, loc, flags, xdata);

out:
    return stub;
}

call_stub_t *
fop_rmdir_cbk_stub(call_frame_t *frame, fop_rmdir_cbk_t fn, int32_t op_ret,
                   int32_t op_errno, struct iatt *preparent,
                   struct iatt *postparent, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_RMDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.rmdir = fn;
    args_rmdir_cbk_store(&stub->args_cbk, op_ret, op_errno, preparent,
                         postparent, xdata);
out:
    return stub;
}

call_stub_t *
fop_symlink_stub(call_frame_t *frame, fop_symlink_t fn, const char *linkname,
                 loc_t *loc, mode_t umask, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);
    GF_VALIDATE_OR_GOTO("call-stub", linkname, out);

    stub = stub_new(frame, 1, GF_FOP_SYMLINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.symlink = fn;
    args_symlink_store(&stub->args, linkname, loc, umask, xdata);
out:
    return stub;
}

call_stub_t *
fop_symlink_cbk_stub(call_frame_t *frame, fop_symlink_cbk_t fn, int32_t op_ret,
                     int32_t op_errno, inode_t *inode, struct iatt *buf,
                     struct iatt *preparent, struct iatt *postparent,
                     dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_SYMLINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.symlink = fn;
    args_symlink_cbk_store(&stub->args_cbk, op_ret, op_errno, inode, buf,
                           preparent, postparent, xdata);
out:
    return stub;
}

call_stub_t *
fop_rename_stub(call_frame_t *frame, fop_rename_t fn, loc_t *oldloc,
                loc_t *newloc, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", oldloc, out);
    GF_VALIDATE_OR_GOTO("call-stub", newloc, out);

    stub = stub_new(frame, 1, GF_FOP_RENAME);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.rename = fn;
    args_rename_store(&stub->args, oldloc, newloc, xdata);
out:
    return stub;
}

call_stub_t *
fop_rename_cbk_stub(call_frame_t *frame, fop_rename_cbk_t fn, int32_t op_ret,
                    int32_t op_errno, struct iatt *buf,
                    struct iatt *preoldparent, struct iatt *postoldparent,
                    struct iatt *prenewparent, struct iatt *postnewparent,
                    dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_RENAME);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.rename = fn;
    args_rename_cbk_store(&stub->args_cbk, op_ret, op_errno, buf, preoldparent,
                          postoldparent, prenewparent, postnewparent, xdata);
out:
    return stub;
}

call_stub_t *
fop_link_stub(call_frame_t *frame, fop_link_t fn, loc_t *oldloc, loc_t *newloc,
              dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", oldloc, out);
    GF_VALIDATE_OR_GOTO("call-stub", newloc, out);

    stub = stub_new(frame, 1, GF_FOP_LINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.link = fn;
    args_link_store(&stub->args, oldloc, newloc, xdata);
out:
    return stub;
}

call_stub_t *
fop_link_cbk_stub(call_frame_t *frame, fop_link_cbk_t fn, int32_t op_ret,
                  int32_t op_errno, inode_t *inode, struct iatt *buf,
                  struct iatt *preparent, struct iatt *postparent,
                  dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_LINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.link = fn;
    args_link_cbk_store(&stub->args_cbk, op_ret, op_errno, inode, buf,
                        preparent, postparent, xdata);
out:
    return stub;
}

call_stub_t *
fop_create_stub(call_frame_t *frame, fop_create_t fn, loc_t *loc, int32_t flags,
                mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_CREATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.create = fn;
    args_create_store(&stub->args, loc, flags, mode, umask, fd, xdata);
out:
    return stub;
}

call_stub_t *
fop_create_cbk_stub(call_frame_t *frame, fop_create_cbk_t fn, int32_t op_ret,
                    int32_t op_errno, fd_t *fd, inode_t *inode,
                    struct iatt *buf, struct iatt *preparent,
                    struct iatt *postparent, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_CREATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.create = fn;
    args_create_cbk_store(&stub->args_cbk, op_ret, op_errno, fd, inode, buf,
                          preparent, postparent, xdata);
out:
    return stub;
}

call_stub_t *
fop_open_stub(call_frame_t *frame, fop_open_t fn, loc_t *loc, int32_t flags,
              fd_t *fd, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_OPEN);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.open = fn;
    args_open_store(&stub->args, loc, flags, fd, xdata);
out:
    return stub;
}

call_stub_t *
fop_open_cbk_stub(call_frame_t *frame, fop_open_cbk_t fn, int32_t op_ret,
                  int32_t op_errno, fd_t *fd, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_OPEN);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.open = fn;
    args_open_cbk_store(&stub->args_cbk, op_ret, op_errno, fd, xdata);
out:
    return stub;
}

call_stub_t *
fop_readv_stub(call_frame_t *frame, fop_readv_t fn, fd_t *fd, size_t size,
               off_t off, uint32_t flags, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_READ);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.readv = fn;
    args_readv_store(&stub->args, fd, size, off, flags, xdata);
out:
    return stub;
}

call_stub_t *
fop_readv_cbk_stub(call_frame_t *frame, fop_readv_cbk_t fn, int32_t op_ret,
                   int32_t op_errno, struct iovec *vector, int32_t count,
                   struct iatt *stbuf, struct iobref *iobref, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_READ);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.readv = fn;
    args_readv_cbk_store(&stub->args_cbk, op_ret, op_errno, vector, count,
                         stbuf, iobref, xdata);
out:
    return stub;
}

call_stub_t *
fop_writev_stub(call_frame_t *frame, fop_writev_t fn, fd_t *fd,
                struct iovec *vector, int32_t count, off_t off, uint32_t flags,
                struct iobref *iobref, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", vector, out);

    stub = stub_new(frame, 1, GF_FOP_WRITE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.writev = fn;
    args_writev_store(&stub->args, fd, vector, count, off, flags, iobref,
                      xdata);
out:
    return stub;
}

call_stub_t *
fop_writev_cbk_stub(call_frame_t *frame, fop_writev_cbk_t fn, int32_t op_ret,
                    int32_t op_errno, struct iatt *prebuf, struct iatt *postbuf,
                    dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_WRITE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.writev = fn;
    args_writev_cbk_store(&stub->args_cbk, op_ret, op_errno, prebuf, postbuf,
                          xdata);
out:
    return stub;
}

call_stub_t *
fop_flush_stub(call_frame_t *frame, fop_flush_t fn, fd_t *fd, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_FLUSH);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.flush = fn;
    args_flush_store(&stub->args, fd, xdata);
out:
    return stub;
}

call_stub_t *
fop_flush_cbk_stub(call_frame_t *frame, fop_flush_cbk_t fn, int32_t op_ret,
                   int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FLUSH);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.flush = fn;
    args_flush_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_fsync_stub(call_frame_t *frame, fop_fsync_t fn, fd_t *fd, int32_t datasync,
               dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_FSYNC);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fsync = fn;
    args_fsync_store(&stub->args, fd, datasync, xdata);
out:
    return stub;
}

call_stub_t *
fop_fsync_cbk_stub(call_frame_t *frame, fop_fsync_cbk_t fn, int32_t op_ret,
                   int32_t op_errno, struct iatt *prebuf, struct iatt *postbuf,
                   dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FSYNC);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fsync = fn;
    args_fsync_cbk_store(&stub->args_cbk, op_ret, op_errno, prebuf, postbuf,
                         xdata);
out:
    return stub;
}

call_stub_t *
fop_opendir_stub(call_frame_t *frame, fop_opendir_t fn, loc_t *loc, fd_t *fd,
                 dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_OPENDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.opendir = fn;
    args_opendir_store(&stub->args, loc, fd, xdata);
out:
    return stub;
}

call_stub_t *
fop_opendir_cbk_stub(call_frame_t *frame, fop_opendir_cbk_t fn, int32_t op_ret,
                     int32_t op_errno, fd_t *fd, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_OPENDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.opendir = fn;
    args_opendir_cbk_store(&stub->args_cbk, op_ret, op_errno, fd, xdata);
out:
    return stub;
}

call_stub_t *
fop_fsyncdir_stub(call_frame_t *frame, fop_fsyncdir_t fn, fd_t *fd,
                  int32_t datasync, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_FSYNCDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fsyncdir = fn;
    args_fsyncdir_store(&stub->args, fd, datasync, xdata);
out:
    return stub;
}

call_stub_t *
fop_fsyncdir_cbk_stub(call_frame_t *frame, fop_fsyncdir_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FSYNCDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fsyncdir = fn;
    args_fsyncdir_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_statfs_stub(call_frame_t *frame, fop_statfs_t fn, loc_t *loc, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_STATFS);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.statfs = fn;
    args_statfs_store(&stub->args, loc, xdata);
out:
    return stub;
}

call_stub_t *
fop_statfs_cbk_stub(call_frame_t *frame, fop_statfs_cbk_t fn, int32_t op_ret,
                    int32_t op_errno, struct statvfs *buf, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_STATFS);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.statfs = fn;
    args_statfs_cbk_store(&stub->args_cbk, op_ret, op_errno, buf, xdata);
out:
    return stub;
}

call_stub_t *
fop_setxattr_stub(call_frame_t *frame, fop_setxattr_t fn, loc_t *loc,
                  dict_t *dict, int32_t flags, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_SETXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.setxattr = fn;
    args_setxattr_store(&stub->args, loc, dict, flags, xdata);
out:
    return stub;
}

call_stub_t *
fop_setxattr_cbk_stub(call_frame_t *frame, fop_setxattr_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_SETXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.setxattr = fn;
    args_setxattr_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_getxattr_stub(call_frame_t *frame, fop_getxattr_t fn, loc_t *loc,
                  const char *name, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);

    stub = stub_new(frame, 1, GF_FOP_GETXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.getxattr = fn;
    args_getxattr_store(&stub->args, loc, name, xdata);
out:
    return stub;
}

call_stub_t *
fop_getxattr_cbk_stub(call_frame_t *frame, fop_getxattr_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, dict_t *dict,
                      dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_GETXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.getxattr = fn;
    args_getxattr_cbk_store(&stub->args_cbk, op_ret, op_errno, dict, xdata);
out:
    return stub;
}

call_stub_t *
fop_fsetxattr_stub(call_frame_t *frame, fop_fsetxattr_t fn, fd_t *fd,
                   dict_t *dict, int32_t flags, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fd, out);

    stub = stub_new(frame, 1, GF_FOP_FSETXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fsetxattr = fn;
    args_fsetxattr_store(&stub->args, fd, dict, flags, xdata);
out:
    return stub;
}

call_stub_t *
fop_fsetxattr_cbk_stub(call_frame_t *frame, fop_fsetxattr_cbk_t fn,
                       int32_t op_ret, int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FSETXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fsetxattr = fn;
    args_fsetxattr_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_fgetxattr_stub(call_frame_t *frame, fop_fgetxattr_t fn, fd_t *fd,
                   const char *name, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fd, out);

    stub = stub_new(frame, 1, GF_FOP_FGETXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fgetxattr = fn;
    args_fgetxattr_store(&stub->args, fd, name, xdata);
out:
    return stub;
}

call_stub_t *
fop_fgetxattr_cbk_stub(call_frame_t *frame, fop_fgetxattr_cbk_t fn,
                       int32_t op_ret, int32_t op_errno, dict_t *dict,
                       dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_GETXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fgetxattr = fn;
    args_fgetxattr_cbk_store(&stub->args_cbk, op_ret, op_errno, dict, xdata);
out:
    return stub;
}

call_stub_t *
fop_removexattr_stub(call_frame_t *frame, fop_removexattr_t fn, loc_t *loc,
                     const char *name, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", loc, out);
    GF_VALIDATE_OR_GOTO("call-stub", name, out);

    stub = stub_new(frame, 1, GF_FOP_REMOVEXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.removexattr = fn;
    args_removexattr_store(&stub->args, loc, name, xdata);
out:
    return stub;
}

call_stub_t *
fop_removexattr_cbk_stub(call_frame_t *frame, fop_removexattr_cbk_t fn,
                         int32_t op_ret, int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_REMOVEXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.removexattr = fn;
    args_removexattr_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_fremovexattr_stub(call_frame_t *frame, fop_fremovexattr_t fn, fd_t *fd,
                      const char *name, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fd, out);
    GF_VALIDATE_OR_GOTO("call-stub", name, out);

    stub = stub_new(frame, 1, GF_FOP_FREMOVEXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fremovexattr = fn;
    args_fremovexattr_store(&stub->args, fd, name, xdata);
out:
    return stub;
}

call_stub_t *
fop_fremovexattr_cbk_stub(call_frame_t *frame, fop_fremovexattr_cbk_t fn,
                          int32_t op_ret, int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FREMOVEXATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fremovexattr = fn;
    args_fremovexattr_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_lk_stub(call_frame_t *frame, fop_lk_t fn, fd_t *fd, int32_t cmd,
            struct gf_flock *lock, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", lock, out);

    stub = stub_new(frame, 1, GF_FOP_LK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.lk = fn;
    args_lk_store(&stub->args, fd, cmd, lock, xdata);
out:
    return stub;
}

call_stub_t *
fop_lk_cbk_stub(call_frame_t *frame, fop_lk_cbk_t fn, int32_t op_ret,
                int32_t op_errno, struct gf_flock *lock, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_LK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.lk = fn;
    args_lk_cbk_store(&stub->args_cbk, op_ret, op_errno, lock, xdata);
out:
    return stub;
}

call_stub_t *
fop_inodelk_stub(call_frame_t *frame, fop_inodelk_t fn, const char *volume,
                 loc_t *loc, int32_t cmd, struct gf_flock *lock, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", lock, out);

    stub = stub_new(frame, 1, GF_FOP_INODELK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.inodelk = fn;
    args_inodelk_store(&stub->args, volume, loc, cmd, lock, xdata);
out:
    return stub;
}

call_stub_t *
fop_inodelk_cbk_stub(call_frame_t *frame, fop_inodelk_cbk_t fn, int32_t op_ret,
                     int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_INODELK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.inodelk = fn;
    args_inodelk_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_finodelk_stub(call_frame_t *frame, fop_finodelk_t fn, const char *volume,
                  fd_t *fd, int32_t cmd, struct gf_flock *lock, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", lock, out);

    stub = stub_new(frame, 1, GF_FOP_FINODELK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.finodelk = fn;
    args_finodelk_store(&stub->args, volume, fd, cmd, lock, xdata);

out:
    return stub;
}

call_stub_t *
fop_finodelk_cbk_stub(call_frame_t *frame, fop_inodelk_cbk_t fn, int32_t op_ret,
                      int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FINODELK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.finodelk = fn;
    args_finodelk_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_entrylk_stub(call_frame_t *frame, fop_entrylk_t fn, const char *volume,
                 loc_t *loc, const char *name, entrylk_cmd cmd,
                 entrylk_type type, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_ENTRYLK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.entrylk = fn;
    args_entrylk_store(&stub->args, volume, loc, name, cmd, type, xdata);

out:
    return stub;
}

call_stub_t *
fop_entrylk_cbk_stub(call_frame_t *frame, fop_entrylk_cbk_t fn, int32_t op_ret,
                     int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_ENTRYLK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.entrylk = fn;
    args_entrylk_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_fentrylk_stub(call_frame_t *frame, fop_fentrylk_t fn, const char *volume,
                  fd_t *fd, const char *name, entrylk_cmd cmd,
                  entrylk_type type, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_FENTRYLK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fentrylk = fn;
    args_fentrylk_store(&stub->args, volume, fd, name, cmd, type, xdata);
out:
    return stub;
}

call_stub_t *
fop_fentrylk_cbk_stub(call_frame_t *frame, fop_fentrylk_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FENTRYLK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fentrylk = fn;
    args_fentrylk_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_readdirp_cbk_stub(call_frame_t *frame, fop_readdirp_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, gf_dirent_t *entries,
                      dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_READDIRP);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.readdirp = fn;
    args_readdirp_cbk_store(&stub->args_cbk, op_ret, op_errno, entries, xdata);
out:
    return stub;
}

call_stub_t *
fop_readdir_cbk_stub(call_frame_t *frame, fop_readdir_cbk_t fn, int32_t op_ret,
                     int32_t op_errno, gf_dirent_t *entries, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_READDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.readdir = fn;
    args_readdir_cbk_store(&stub->args_cbk, op_ret, op_errno, entries, xdata);
out:
    return stub;
}

call_stub_t *
fop_readdir_stub(call_frame_t *frame, fop_readdir_t fn, fd_t *fd, size_t size,
                 off_t off, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_READDIR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.readdir = fn;
    args_readdir_store(&stub->args, fd, size, off, xdata);
out:
    return stub;
}

call_stub_t *
fop_readdirp_stub(call_frame_t *frame, fop_readdirp_t fn, fd_t *fd, size_t size,
                  off_t off, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 1, GF_FOP_READDIRP);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.readdirp = fn;
    args_readdirp_store(&stub->args, fd, size, off, xdata);
out:
    return stub;
}

call_stub_t *
fop_rchecksum_stub(call_frame_t *frame, fop_rchecksum_t fn, fd_t *fd,
                   off_t offset, int32_t len, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fd, out);

    stub = stub_new(frame, 1, GF_FOP_RCHECKSUM);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.rchecksum = fn;
    args_rchecksum_store(&stub->args, fd, offset, len, xdata);
out:
    return stub;
}

call_stub_t *
fop_rchecksum_cbk_stub(call_frame_t *frame, fop_rchecksum_cbk_t fn,
                       int32_t op_ret, int32_t op_errno, uint32_t weak_checksum,
                       uint8_t *strong_checksum, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_RCHECKSUM);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.rchecksum = fn;
    args_rchecksum_cbk_store(&stub->args_cbk, op_ret, op_errno, weak_checksum,
                             strong_checksum, xdata);
out:
    return stub;
}

call_stub_t *
fop_xattrop_cbk_stub(call_frame_t *frame, fop_xattrop_cbk_t fn, int32_t op_ret,
                     int32_t op_errno, dict_t *xattr, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_XATTROP);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.xattrop = fn;
    args_xattrop_cbk_store(&stub->args_cbk, op_ret, op_errno, xattr, xdata);
out:
    return stub;
}

call_stub_t *
fop_fxattrop_cbk_stub(call_frame_t *frame, fop_fxattrop_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, dict_t *xattr,
                      dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FXATTROP);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fxattrop = fn;
    args_xattrop_cbk_store(&stub->args_cbk, op_ret, op_errno, xattr, xdata);
out:
    return stub;
}

call_stub_t *
fop_xattrop_stub(call_frame_t *frame, fop_xattrop_t fn, loc_t *loc,
                 gf_xattrop_flags_t optype, dict_t *xattr, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", xattr, out);

    stub = stub_new(frame, 1, GF_FOP_XATTROP);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.xattrop = fn;
    args_xattrop_store(&stub->args, loc, optype, xattr, xdata);
out:
    return stub;
}

call_stub_t *
fop_fxattrop_stub(call_frame_t *frame, fop_fxattrop_t fn, fd_t *fd,
                  gf_xattrop_flags_t optype, dict_t *xattr, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", xattr, out);

    stub = stub_new(frame, 1, GF_FOP_FXATTROP);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fxattrop = fn;
    args_fxattrop_store(&stub->args, fd, optype, xattr, xdata);
out:
    return stub;
}

call_stub_t *
fop_setattr_cbk_stub(call_frame_t *frame, fop_setattr_cbk_t fn, int32_t op_ret,
                     int32_t op_errno, struct iatt *statpre,
                     struct iatt *statpost, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_SETATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.setattr = fn;
    args_setattr_cbk_store(&stub->args_cbk, op_ret, op_errno, statpre, statpost,
                           xdata);
out:
    return stub;
}

call_stub_t *
fop_fsetattr_cbk_stub(call_frame_t *frame, fop_setattr_cbk_t fn, int32_t op_ret,
                      int32_t op_errno, struct iatt *statpre,
                      struct iatt *statpost, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FSETATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fsetattr = fn;
    args_fsetattr_cbk_store(&stub->args_cbk, op_ret, op_errno, statpre,
                            statpost, xdata);
out:
    return stub;
}

call_stub_t *
fop_setattr_stub(call_frame_t *frame, fop_setattr_t fn, loc_t *loc,
                 struct iatt *stbuf, int32_t valid, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_SETATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.setattr = fn;
    args_setattr_store(&stub->args, loc, stbuf, valid, xdata);
out:
    return stub;
}

call_stub_t *
fop_fsetattr_stub(call_frame_t *frame, fop_fsetattr_t fn, fd_t *fd,
                  struct iatt *stbuf, int32_t valid, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_FSETATTR);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fsetattr = fn;
    args_fsetattr_store(&stub->args, fd, stbuf, valid, xdata);
out:
    return stub;
}

call_stub_t *
fop_fallocate_cbk_stub(call_frame_t *frame, fop_fallocate_cbk_t fn,
                       int32_t op_ret, int32_t op_errno, struct iatt *statpre,
                       struct iatt *statpost, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_FALLOCATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.fallocate = fn;

    args_fallocate_cbk_store(&stub->args_cbk, op_ret, op_errno, statpre,
                             statpost, xdata);
out:
    return stub;
}

call_stub_t *
fop_fallocate_stub(call_frame_t *frame, fop_fallocate_t fn, fd_t *fd,
                   int32_t mode, off_t offset, size_t len, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_FALLOCATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.fallocate = fn;
    args_fallocate_store(&stub->args, fd, mode, offset, len, xdata);
out:
    return stub;
}

call_stub_t *
fop_discard_cbk_stub(call_frame_t *frame, fop_discard_cbk_t fn, int32_t op_ret,
                     int32_t op_errno, struct iatt *statpre,
                     struct iatt *statpost, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_DISCARD);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.discard = fn;

    args_discard_cbk_store(&stub->args_cbk, op_ret, op_errno, statpre, statpost,
                           xdata);
out:
    return stub;
}

call_stub_t *
fop_discard_stub(call_frame_t *frame, fop_discard_t fn, fd_t *fd, off_t offset,
                 size_t len, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_DISCARD);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.discard = fn;
    args_discard_store(&stub->args, fd, offset, len, xdata);
out:
    return stub;
}

call_stub_t *
fop_zerofill_cbk_stub(call_frame_t *frame, fop_zerofill_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, struct iatt *statpre,
                      struct iatt *statpost, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_ZEROFILL);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.zerofill = fn;

    args_zerofill_cbk_store(&stub->args_cbk, op_ret, op_errno, statpre,
                            statpost, xdata);
out:
    return stub;
}

call_stub_t *
fop_zerofill_stub(call_frame_t *frame, fop_zerofill_t fn, fd_t *fd,
                  off_t offset, off_t len, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_ZEROFILL);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.zerofill = fn;
    args_zerofill_store(&stub->args, fd, offset, len, xdata);
out:
    return stub;
}

call_stub_t *
fop_ipc_cbk_stub(call_frame_t *frame, fop_ipc_cbk_t fn, int32_t op_ret,
                 int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_IPC);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.ipc = fn;

    args_ipc_cbk_store(&stub->args_cbk, op_ret, op_errno, xdata);
out:
    return stub;
}

call_stub_t *
fop_ipc_stub(call_frame_t *frame, fop_ipc_t fn, int32_t op, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_IPC);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.ipc = fn;
    args_ipc_store(&stub->args, op, xdata);
out:
    return stub;
}

call_stub_t *
fop_lease_cbk_stub(call_frame_t *frame, fop_lease_cbk_t fn, int32_t op_ret,
                   int32_t op_errno, struct gf_lease *lease, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_LEASE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.lease = fn;
    args_lease_cbk_store(&stub->args_cbk, op_ret, op_errno, lease, xdata);
out:
    return stub;
}

call_stub_t *
fop_lease_stub(call_frame_t *frame, fop_lease_t fn, loc_t *loc,
               struct gf_lease *lease, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);
    GF_VALIDATE_OR_GOTO("call-stub", lease, out);

    stub = stub_new(frame, 1, GF_FOP_LEASE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.lease = fn;
    args_lease_store(&stub->args, loc, lease, xdata);
out:
    return stub;
}

call_stub_t *
fop_seek_cbk_stub(call_frame_t *frame, fop_seek_cbk_t fn, int32_t op_ret,
                  int32_t op_errno, off_t offset, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_SEEK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.seek = fn;

    args_seek_cbk_store(&stub->args_cbk, op_ret, op_errno, offset, xdata);
out:
    return stub;
}

call_stub_t *
fop_seek_stub(call_frame_t *frame, fop_seek_t fn, fd_t *fd, off_t offset,
              gf_seek_what_t what, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_SEEK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.seek = fn;
    args_seek_store(&stub->args, fd, offset, what, xdata);
out:
    return stub;
}

call_stub_t *
fop_getactivelk_cbk_stub(call_frame_t *frame, fop_getactivelk_cbk_t fn,
                         int32_t op_ret, int32_t op_errno,
                         lock_migration_info_t *lmi, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_GETACTIVELK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.getactivelk = fn;

    args_getactivelk_cbk_store(&stub->args_cbk, op_ret, op_errno, lmi, xdata);
out:
    return stub;
}

call_stub_t *
fop_getactivelk_stub(call_frame_t *frame, fop_getactivelk_t fn, loc_t *loc,
                     dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_GETACTIVELK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.getactivelk = fn;

    loc_copy(&stub->args.loc, loc);

    if (xdata)
        stub->args.xdata = dict_ref(xdata);
out:
    return stub;
}

call_stub_t *
fop_setactivelk_cbk_stub(call_frame_t *frame, fop_setactivelk_cbk_t fn,
                         int32_t op_ret, int32_t op_errno, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_SETACTIVELK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.setactivelk = fn;
    stub->args_cbk.op_ret = op_ret;
    stub->args_cbk.op_errno = op_errno;

    if (xdata)
        stub->args.xdata = dict_ref(xdata);

out:
    return stub;
}

call_stub_t *
fop_setactivelk_stub(call_frame_t *frame, fop_setactivelk_t fn, loc_t *loc,
                     lock_migration_info_t *locklist, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_SETACTIVELK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.setactivelk = fn;

    args_setactivelk_store(&stub->args, loc, locklist, xdata);

out:
    return stub;
}

call_stub_t *
fop_copy_file_range_stub(call_frame_t *frame, fop_copy_file_range_t fn,
                         fd_t *fd_in, off64_t off_in, fd_t *fd_out,
                         off64_t off_out, size_t len, uint32_t flags,
                         dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_COPY_FILE_RANGE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.copy_file_range = fn;

    args_copy_file_range_store(&stub->args, fd_in, off_in, fd_out, off_out, len,
                               flags, xdata);

out:
    return stub;
}

call_stub_t *
fop_copy_file_range_cbk_stub(call_frame_t *frame, fop_copy_file_range_cbk_t fn,
                             int32_t op_ret, int32_t op_errno,
                             struct iatt *stbuf, struct iatt *prebuf_dst,
                             struct iatt *postbuf_dst, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 0, GF_FOP_COPY_FILE_RANGE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.copy_file_range = fn;
    args_copy_file_range_cbk_store(&stub->args_cbk, op_ret, op_errno, stbuf,
                                   prebuf_dst, postbuf_dst, xdata);

out:
    return stub;
}

call_stub_t *
fop_put_stub(call_frame_t *frame, fop_put_t fn, loc_t *loc, mode_t mode,
             mode_t umask, uint32_t flags, struct iovec *vector, int32_t count,
             off_t offset, struct iobref *iobref, dict_t *xattr, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", vector, out);

    stub = stub_new(frame, 1, GF_FOP_PUT);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.put = fn;
    args_put_store(&stub->args, loc, mode, umask, flags, vector, count, offset,
                   iobref, xattr, xdata);
out:
    return stub;
}

call_stub_t *
fop_put_cbk_stub(call_frame_t *frame, fop_put_cbk_t fn, int32_t op_ret,
                 int32_t op_errno, inode_t *inode, struct iatt *buf,
                 struct iatt *preparent, struct iatt *postparent, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_PUT);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.put = fn;
    args_put_cbk_store(&stub->args_cbk, op_ret, op_errno, inode, buf, preparent,
                       postparent, xdata);
out:
    return stub;
}

call_stub_t *
fop_icreate_stub(call_frame_t *frame, fop_icreate_t fn, loc_t *loc, mode_t mode,
                 dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_ICREATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.icreate = fn;

    stub->args.mode = mode;
    if (loc)
        loc_copy(&stub->args.loc, loc);
    if (xdata)
        stub->args.xdata = dict_ref(xdata);

out:
    return stub;
}

static void
args_icreate_store_cbk(default_args_cbk_t *args, int32_t op_ret,
                       int32_t op_errno, inode_t *inode, struct iatt *buf,
                       dict_t *xdata)
{
    args->op_ret = op_ret;
    args->op_errno = op_errno;
    if (inode)
        args->inode = inode_ref(inode);
    if (buf)
        args->stat = *buf;
    if (xdata)
        args->xdata = dict_ref(xdata);
}

call_stub_t *
fop_icreate_cbk_stub(call_frame_t *frame, fop_icreate_cbk_t fn, int32_t op_ret,
                     int32_t op_errno, inode_t *inode, struct iatt *buf,
                     dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_ICREATE);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.icreate = fn;
    args_icreate_store_cbk(&stub->args_cbk, op_ret, op_errno, inode, buf,
                           xdata);

out:
    return stub;
}

call_stub_t *
fop_namelink_stub(call_frame_t *frame, fop_namelink_t fn, loc_t *loc,
                  dict_t *xdata)
{
    call_stub_t *stub = NULL;

    GF_VALIDATE_OR_GOTO("call-stub", fn, out);

    stub = stub_new(frame, 1, GF_FOP_NAMELINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn.namelink = fn;

    if (loc)
        loc_copy(&stub->args.loc, loc);
    if (xdata)
        stub->args.xdata = dict_ref(xdata);

out:
    return stub;
}

static void
args_namelink_store_cbk(default_args_cbk_t *args, int32_t op_ret,
                        int32_t op_errno, struct iatt *prebuf,
                        struct iatt *postbuf, dict_t *xdata)
{
    args->op_ret = op_ret;
    args->op_errno = op_errno;

    if (prebuf)
        args->prestat = *prebuf;
    if (postbuf)
        args->poststat = *postbuf;
    if (xdata)
        args->xdata = dict_ref(xdata);
}

call_stub_t *
fop_namelink_cbk_stub(call_frame_t *frame, fop_namelink_cbk_t fn,
                      int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
                      struct iatt *postbuf, dict_t *xdata)
{
    call_stub_t *stub = NULL;

    stub = stub_new(frame, 0, GF_FOP_NAMELINK);
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    stub->fn_cbk.namelink = fn;
    args_namelink_store_cbk(&stub->args_cbk, op_ret, op_errno, prebuf, postbuf,
                            xdata);

out:
    return stub;
}

void
call_resume_wind(call_stub_t *stub)
{
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    switch (stub->fop) {
        case GF_FOP_OPEN:
            stub->fn.open(stub->frame, stub->frame->this, &stub->args.loc,
                          stub->args.flags, stub->args.fd, stub->args.xdata);
            break;
        case GF_FOP_CREATE:
            stub->fn.create(stub->frame, stub->frame->this, &stub->args.loc,
                            stub->args.flags, stub->args.mode, stub->args.umask,
                            stub->args.fd, stub->args.xdata);
            break;
        case GF_FOP_STAT:
            stub->fn.stat(stub->frame, stub->frame->this, &stub->args.loc,
                          stub->args.xdata);
            break;
        case GF_FOP_READLINK:
            stub->fn.readlink(stub->frame, stub->frame->this, &stub->args.loc,
                              stub->args.size, stub->args.xdata);
            break;
        case GF_FOP_MKNOD:
            stub->fn.mknod(stub->frame, stub->frame->this, &stub->args.loc,
                           stub->args.mode, stub->args.rdev, stub->args.umask,
                           stub->args.xdata);
            break;
        case GF_FOP_MKDIR:
            stub->fn.mkdir(stub->frame, stub->frame->this, &stub->args.loc,
                           stub->args.mode, stub->args.umask, stub->args.xdata);
            break;
        case GF_FOP_UNLINK:
            stub->fn.unlink(stub->frame, stub->frame->this, &stub->args.loc,
                            stub->args.xflag, stub->args.xdata);
            break;
        case GF_FOP_RMDIR:
            stub->fn.rmdir(stub->frame, stub->frame->this, &stub->args.loc,
                           stub->args.flags, stub->args.xdata);
            break;
        case GF_FOP_SYMLINK:
            stub->fn.symlink(stub->frame, stub->frame->this,
                             stub->args.linkname, &stub->args.loc,
                             stub->args.umask, stub->args.xdata);
            break;
        case GF_FOP_RENAME:
            stub->fn.rename(stub->frame, stub->frame->this, &stub->args.loc,
                            &stub->args.loc2, stub->args.xdata);
            break;
        case GF_FOP_LINK:
            stub->fn.link(stub->frame, stub->frame->this, &stub->args.loc,
                          &stub->args.loc2, stub->args.xdata);
            break;
        case GF_FOP_TRUNCATE:
            stub->fn.truncate(stub->frame, stub->frame->this, &stub->args.loc,
                              stub->args.offset, stub->args.xdata);
            break;
        case GF_FOP_READ:
            stub->fn.readv(stub->frame, stub->frame->this, stub->args.fd,
                           stub->args.size, stub->args.offset, stub->args.flags,
                           stub->args.xdata);
            break;
        case GF_FOP_WRITE:
            stub->fn.writev(stub->frame, stub->frame->this, stub->args.fd,
                            stub->args.vector, stub->args.count,
                            stub->args.offset, stub->args.flags,
                            stub->args.iobref, stub->args.xdata);
            break;
        case GF_FOP_STATFS:
            stub->fn.statfs(stub->frame, stub->frame->this, &stub->args.loc,
                            stub->args.xdata);
            break;
        case GF_FOP_FLUSH:
            stub->fn.flush(stub->frame, stub->frame->this, stub->args.fd,
                           stub->args.xdata);
            break;
        case GF_FOP_FSYNC:
            stub->fn.fsync(stub->frame, stub->frame->this, stub->args.fd,
                           stub->args.datasync, stub->args.xdata);
            break;
        case GF_FOP_SETXATTR:
            stub->fn.setxattr(stub->frame, stub->frame->this, &stub->args.loc,
                              stub->args.xattr, stub->args.flags,
                              stub->args.xdata);
            break;
        case GF_FOP_GETXATTR:
            stub->fn.getxattr(stub->frame, stub->frame->this, &stub->args.loc,
                              stub->args.name, stub->args.xdata);
            break;
        case GF_FOP_FSETXATTR:
            stub->fn.fsetxattr(stub->frame, stub->frame->this, stub->args.fd,
                               stub->args.xattr, stub->args.flags,
                               stub->args.xdata);
            break;
        case GF_FOP_FGETXATTR:
            stub->fn.fgetxattr(stub->frame, stub->frame->this, stub->args.fd,
                               stub->args.name, stub->args.xdata);
            break;
        case GF_FOP_REMOVEXATTR:
            stub->fn.removexattr(stub->frame, stub->frame->this,
                                 &stub->args.loc, stub->args.name,
                                 stub->args.xdata);
            break;
        case GF_FOP_FREMOVEXATTR:
            stub->fn.fremovexattr(stub->frame, stub->frame->this, stub->args.fd,
                                  stub->args.name, stub->args.xdata);
            break;
        case GF_FOP_OPENDIR:
            stub->fn.opendir(stub->frame, stub->frame->this, &stub->args.loc,
                             stub->args.fd, stub->args.xdata);
            break;
        case GF_FOP_FSYNCDIR:
            stub->fn.fsyncdir(stub->frame, stub->frame->this, stub->args.fd,
                              stub->args.datasync, stub->args.xdata);
            break;
        case GF_FOP_ACCESS:
            stub->fn.access(stub->frame, stub->frame->this, &stub->args.loc,
                            stub->args.mask, stub->args.xdata);
            break;

        case GF_FOP_FTRUNCATE:
            stub->fn.ftruncate(stub->frame, stub->frame->this, stub->args.fd,
                               stub->args.offset, stub->args.xdata);
            break;
        case GF_FOP_FSTAT:
            stub->fn.fstat(stub->frame, stub->frame->this, stub->args.fd,
                           stub->args.xdata);
            break;
        case GF_FOP_LK:
            stub->fn.lk(stub->frame, stub->frame->this, stub->args.fd,
                        stub->args.cmd, &stub->args.lock, stub->args.xdata);
            break;
        case GF_FOP_INODELK:
            stub->fn.inodelk(stub->frame, stub->frame->this, stub->args.volume,
                             &stub->args.loc, stub->args.cmd, &stub->args.lock,
                             stub->args.xdata);
            break;
        case GF_FOP_FINODELK:
            stub->fn.finodelk(stub->frame, stub->frame->this, stub->args.volume,
                              stub->args.fd, stub->args.cmd, &stub->args.lock,
                              stub->args.xdata);
            break;
        case GF_FOP_ENTRYLK:
            stub->fn.entrylk(stub->frame, stub->frame->this, stub->args.volume,
                             &stub->args.loc, stub->args.name,
                             stub->args.entrylkcmd, stub->args.entrylktype,
                             stub->args.xdata);
            break;
        case GF_FOP_FENTRYLK:
            stub->fn.fentrylk(stub->frame, stub->frame->this, stub->args.volume,
                              stub->args.fd, stub->args.name,
                              stub->args.entrylkcmd, stub->args.entrylktype,
                              stub->args.xdata);
            break;
        case GF_FOP_LOOKUP:
            stub->fn.lookup(stub->frame, stub->frame->this, &stub->args.loc,
                            stub->args.xdata);
            break;
        case GF_FOP_RCHECKSUM:
            stub->fn.rchecksum(stub->frame, stub->frame->this, stub->args.fd,
                               stub->args.offset, stub->args.size,
                               stub->args.xdata);
            break;
        case GF_FOP_READDIR:
            stub->fn.readdir(stub->frame, stub->frame->this, stub->args.fd,
                             stub->args.size, stub->args.offset,
                             stub->args.xdata);
            break;
        case GF_FOP_READDIRP:
            stub->fn.readdirp(stub->frame, stub->frame->this, stub->args.fd,
                              stub->args.size, stub->args.offset,
                              stub->args.xdata);
            break;
        case GF_FOP_XATTROP:
            stub->fn.xattrop(stub->frame, stub->frame->this, &stub->args.loc,
                             stub->args.optype, stub->args.xattr,
                             stub->args.xdata);
            break;
        case GF_FOP_FXATTROP:
            stub->fn.fxattrop(stub->frame, stub->frame->this, stub->args.fd,
                              stub->args.optype, stub->args.xattr,
                              stub->args.xdata);
            break;
        case GF_FOP_SETATTR:
            stub->fn.setattr(stub->frame, stub->frame->this, &stub->args.loc,
                             &stub->args.stat, stub->args.valid,
                             stub->args.xdata);
            break;
        case GF_FOP_FSETATTR:
            stub->fn.fsetattr(stub->frame, stub->frame->this, stub->args.fd,
                              &stub->args.stat, stub->args.valid,
                              stub->args.xdata);
            break;
        case GF_FOP_FALLOCATE:
            stub->fn.fallocate(stub->frame, stub->frame->this, stub->args.fd,
                               stub->args.flags, stub->args.offset,
                               stub->args.size, stub->args.xdata);
            break;
        case GF_FOP_DISCARD:
            stub->fn.discard(stub->frame, stub->frame->this, stub->args.fd,
                             stub->args.offset, stub->args.size,
                             stub->args.xdata);
            break;
        case GF_FOP_ZEROFILL:
            stub->fn.zerofill(stub->frame, stub->frame->this, stub->args.fd,
                              stub->args.offset, stub->args.size,
                              stub->args.xdata);
            break;
        case GF_FOP_IPC:
            stub->fn.ipc(stub->frame, stub->frame->this, stub->args.cmd,
                         stub->args.xdata);
            break;
        case GF_FOP_SEEK:
            stub->fn.seek(stub->frame, stub->frame->this, stub->args.fd,
                          stub->args.offset, stub->args.what, stub->args.xdata);
            break;
        case GF_FOP_LEASE:
            stub->fn.lease(stub->frame, stub->frame->this, &stub->args.loc,
                           &stub->args.lease, stub->args.xdata);
            break;

        case GF_FOP_GETACTIVELK:
            stub->fn.getactivelk(stub->frame, stub->frame->this,
                                 &stub->args.loc, stub->args.xdata);
            break;

        case GF_FOP_SETACTIVELK:
            stub->fn.setactivelk(stub->frame, stub->frame->this,
                                 &stub->args.loc, &stub->args.locklist,
                                 stub->args.xdata);
            break;

        case GF_FOP_PUT:
            stub->fn.put(stub->frame, stub->frame->this, &stub->args.loc,
                         stub->args.mode, stub->args.umask, stub->args.flags,
                         stub->args.vector, stub->args.count, stub->args.offset,
                         stub->args.iobref, stub->args.xattr, stub->args.xdata);
            break;

        case GF_FOP_COPY_FILE_RANGE:
            stub->fn.copy_file_range(
                stub->frame, stub->frame->this, stub->args.fd,
                stub->args.off_in, stub->args.fd_dst, stub->args.off_out,
                stub->args.size, stub->args.flags, stub->args.xdata);
            break;

        default:
            gf_msg_callingfn("call-stub", GF_LOG_ERROR, EINVAL,
                             LG_MSG_INVALID_ENTRY,
                             "Invalid value of FOP"
                             " (%d)",
                             stub->fop);
            break;
    }
out:
    return;
}

#define STUB_UNWIND(stb, fop, args...)                                         \
    do {                                                                       \
        if (stb->fn_cbk.fop)                                                   \
            stb->fn_cbk.fop(stb->frame, stb->frame->cookie, stb->frame->this,  \
                            stb->args_cbk.op_ret, stb->args_cbk.op_errno,      \
                            args);                                             \
        else                                                                   \
            STACK_UNWIND_STRICT(fop, stb->frame, stb->args_cbk.op_ret,         \
                                stb->args_cbk.op_errno, args);                 \
    } while (0)

static void
call_resume_unwind(call_stub_t *stub)
{
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    switch (stub->fop) {
        case GF_FOP_OPEN:
            STUB_UNWIND(stub, open, stub->args_cbk.fd, stub->args_cbk.xdata);
            break;
        case GF_FOP_CREATE:
            STUB_UNWIND(stub, create, stub->args_cbk.fd, stub->args_cbk.inode,
                        &stub->args_cbk.stat, &stub->args_cbk.preparent,
                        &stub->args_cbk.postparent, stub->args_cbk.xdata);
            break;
        case GF_FOP_STAT:
            STUB_UNWIND(stub, stat, &stub->args_cbk.stat, stub->args_cbk.xdata);
            break;
        case GF_FOP_READLINK:
            STUB_UNWIND(stub, readlink, stub->args_cbk.buf,
                        &stub->args_cbk.stat, stub->args.xdata);
            break;
        case GF_FOP_MKNOD:
            STUB_UNWIND(stub, mknod, stub->args_cbk.inode, &stub->args_cbk.stat,
                        &stub->args_cbk.preparent, &stub->args_cbk.postparent,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_MKDIR:
            STUB_UNWIND(stub, mkdir, stub->args_cbk.inode, &stub->args_cbk.stat,
                        &stub->args_cbk.preparent, &stub->args_cbk.postparent,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_UNLINK:
            STUB_UNWIND(stub, unlink, &stub->args_cbk.preparent,
                        &stub->args_cbk.postparent, stub->args_cbk.xdata);
            break;
        case GF_FOP_RMDIR:
            STUB_UNWIND(stub, rmdir, &stub->args_cbk.preparent,
                        &stub->args_cbk.postparent, stub->args_cbk.xdata);
            break;
        case GF_FOP_SYMLINK:
            STUB_UNWIND(stub, symlink, stub->args_cbk.inode,
                        &stub->args_cbk.stat, &stub->args_cbk.preparent,
                        &stub->args_cbk.postparent, stub->args_cbk.xdata);
            break;
        case GF_FOP_RENAME:
            STUB_UNWIND(stub, rename, &stub->args_cbk.stat,
                        &stub->args_cbk.preparent, &stub->args_cbk.postparent,
                        &stub->args_cbk.preparent2, &stub->args_cbk.postparent2,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_LINK:
            STUB_UNWIND(stub, link, stub->args_cbk.inode, &stub->args_cbk.stat,
                        &stub->args_cbk.preparent, &stub->args_cbk.postparent,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_TRUNCATE:
            STUB_UNWIND(stub, truncate, &stub->args_cbk.prestat,
                        &stub->args_cbk.poststat, stub->args_cbk.xdata);
            break;
        case GF_FOP_READ:
            STUB_UNWIND(stub, readv, stub->args_cbk.vector,
                        stub->args_cbk.count, &stub->args_cbk.stat,
                        stub->args_cbk.iobref, stub->args_cbk.xdata);
            break;
        case GF_FOP_WRITE:
            STUB_UNWIND(stub, writev, &stub->args_cbk.prestat,
                        &stub->args_cbk.poststat, stub->args_cbk.xdata);
            break;
        case GF_FOP_STATFS:
            STUB_UNWIND(stub, statfs, &stub->args_cbk.statvfs,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_FLUSH:
            STUB_UNWIND(stub, flush, stub->args_cbk.xdata);
            break;
        case GF_FOP_FSYNC:
            STUB_UNWIND(stub, fsync, &stub->args_cbk.prestat,
                        &stub->args_cbk.poststat, stub->args_cbk.xdata);
            break;
        case GF_FOP_SETXATTR:
            STUB_UNWIND(stub, setxattr, stub->args_cbk.xdata);
            break;
        case GF_FOP_GETXATTR:
            STUB_UNWIND(stub, getxattr, stub->args_cbk.xattr,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_FSETXATTR:
            STUB_UNWIND(stub, fsetxattr, stub->args_cbk.xdata);
            break;
        case GF_FOP_FGETXATTR:
            STUB_UNWIND(stub, fgetxattr, stub->args_cbk.xattr,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_REMOVEXATTR:
            STUB_UNWIND(stub, removexattr, stub->args_cbk.xdata);
            break;
        case GF_FOP_FREMOVEXATTR:
            STUB_UNWIND(stub, fremovexattr, stub->args_cbk.xdata);
            break;
        case GF_FOP_OPENDIR:
            STUB_UNWIND(stub, opendir, stub->args_cbk.fd, stub->args_cbk.xdata);
            break;
        case GF_FOP_FSYNCDIR:
            STUB_UNWIND(stub, fsyncdir, stub->args_cbk.xdata);
            break;
        case GF_FOP_ACCESS:
            STUB_UNWIND(stub, access, stub->args_cbk.xdata);
            break;
        case GF_FOP_FTRUNCATE:
            STUB_UNWIND(stub, ftruncate, &stub->args_cbk.prestat,
                        &stub->args_cbk.poststat, stub->args_cbk.xdata);
            break;
        case GF_FOP_FSTAT:
            STUB_UNWIND(stub, fstat, &stub->args_cbk.stat,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_LK:
            STUB_UNWIND(stub, lk, &stub->args_cbk.lock, stub->args_cbk.xdata);
            break;
        case GF_FOP_INODELK:
            STUB_UNWIND(stub, inodelk, stub->args_cbk.xdata);
            break;
        case GF_FOP_FINODELK:
            STUB_UNWIND(stub, finodelk, stub->args_cbk.xdata);
            break;
        case GF_FOP_ENTRYLK:
            STUB_UNWIND(stub, entrylk, stub->args_cbk.xdata);
            break;
        case GF_FOP_FENTRYLK:
            STUB_UNWIND(stub, fentrylk, stub->args_cbk.xdata);
            break;
        case GF_FOP_LOOKUP:
            STUB_UNWIND(stub, lookup, stub->args_cbk.inode,
                        &stub->args_cbk.stat, stub->args_cbk.xdata,
                        &stub->args_cbk.postparent);
            break;
        case GF_FOP_RCHECKSUM:
            STUB_UNWIND(stub, rchecksum, stub->args_cbk.weak_checksum,
                        stub->args_cbk.strong_checksum, stub->args_cbk.xdata);
            break;
        case GF_FOP_READDIR:
            STUB_UNWIND(stub, readdir, &stub->args_cbk.entries,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_READDIRP:
            STUB_UNWIND(stub, readdir, &stub->args_cbk.entries,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_XATTROP:
            STUB_UNWIND(stub, xattrop, stub->args_cbk.xattr,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_FXATTROP:
            STUB_UNWIND(stub, fxattrop, stub->args_cbk.xattr,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_SETATTR:
            STUB_UNWIND(stub, setattr, &stub->args_cbk.prestat,
                        &stub->args_cbk.poststat, stub->args_cbk.xdata);
            break;
        case GF_FOP_FSETATTR:
            STUB_UNWIND(stub, fsetattr, &stub->args_cbk.prestat,
                        &stub->args_cbk.poststat, stub->args_cbk.xdata);
            break;
        case GF_FOP_FALLOCATE:
            STUB_UNWIND(stub, fallocate, &stub->args_cbk.prestat,
                        &stub->args_cbk.poststat, stub->args_cbk.xdata);
            break;
        case GF_FOP_DISCARD:
            STUB_UNWIND(stub, discard, &stub->args_cbk.prestat,
                        &stub->args_cbk.poststat, stub->args_cbk.xdata);
            break;
        case GF_FOP_ZEROFILL:
            STUB_UNWIND(stub, zerofill, &stub->args_cbk.prestat,
                        &stub->args_cbk.poststat, stub->args_cbk.xdata);
            break;
        case GF_FOP_IPC:
            STUB_UNWIND(stub, ipc, stub->args_cbk.xdata);
            break;
        case GF_FOP_SEEK:
            STUB_UNWIND(stub, seek, stub->args_cbk.offset,
                        stub->args_cbk.xdata);
            break;
        case GF_FOP_LEASE:
            STUB_UNWIND(stub, lease, &stub->args_cbk.lease,
                        stub->args_cbk.xdata);
            break;

        case GF_FOP_GETACTIVELK:
            STUB_UNWIND(stub, getactivelk, &stub->args_cbk.locklist,
                        stub->args_cbk.xdata);
            break;

        case GF_FOP_SETACTIVELK:
            STUB_UNWIND(stub, setactivelk, stub->args_cbk.xdata);
            break;

        case GF_FOP_PUT:
            STUB_UNWIND(stub, put, stub->args_cbk.inode, &stub->args_cbk.stat,
                        &stub->args_cbk.preparent, &stub->args_cbk.postparent,
                        stub->args_cbk.xdata);
            break;

        case GF_FOP_COPY_FILE_RANGE:
            STUB_UNWIND(stub, copy_file_range, &stub->args_cbk.stat,
                        &stub->args_cbk.prestat, &stub->args_cbk.poststat,
                        stub->args_cbk.xdata);
            break;

        default:
            gf_msg_callingfn("call-stub", GF_LOG_ERROR, EINVAL,
                             LG_MSG_INVALID_ENTRY,
                             "Invalid value of FOP"
                             " (%d)",
                             stub->fop);
            break;
    }
out:
    return;
}

static void
call_stub_wipe_args(call_stub_t *stub)
{
    args_wipe(&stub->args);
}

static void
call_stub_wipe_args_cbk(call_stub_t *stub)
{
    args_cbk_wipe(&stub->args_cbk);
}

void
call_stub_destroy(call_stub_t *stub)
{
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    if (stub->wind)
        call_stub_wipe_args(stub);
    else
        call_stub_wipe_args_cbk(stub);

    GF_FREE(stub);
out:
    return;
}

void
call_resume(call_stub_t *stub)
{
    xlator_t *old_THIS = NULL;

    errno = EINVAL;
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    list_del_init(&stub->list);

    old_THIS = THIS;
    THIS = stub->frame->this;
    {
        if (stub->wind)
            call_resume_wind(stub);
        else
            call_resume_unwind(stub);
    }
    THIS = old_THIS;

    call_stub_destroy(stub);
out:
    return;
}

void
call_unwind_error(call_stub_t *stub, int op_ret, int op_errno)
{
    xlator_t *old_THIS = NULL;

    list_del_init(&stub->list);

    old_THIS = THIS;
    THIS = stub->frame->this;
    {
        stub->args_cbk.op_ret = op_ret;
        stub->args_cbk.op_errno = op_errno;
        call_resume_unwind(stub);
    }
    THIS = old_THIS;

    call_stub_destroy(stub);

    return;
}

void
call_unwind_error_keep_stub(call_stub_t *stub, int op_ret, int op_errno)
{
    xlator_t *old_THIS = NULL;

    list_del_init(&stub->list);

    old_THIS = THIS;
    THIS = stub->frame->this;
    {
        stub->args_cbk.op_ret = op_ret;
        stub->args_cbk.op_errno = op_errno;
        call_resume_unwind(stub);
    }

    THIS = old_THIS;

    return;
}

void
call_resume_keep_stub(call_stub_t *stub)
{
    xlator_t *old_THIS = NULL;

    errno = EINVAL;
    GF_VALIDATE_OR_GOTO("call-stub", stub, out);

    list_del_init(&stub->list);

    old_THIS = THIS;
    THIS = stub->frame->this;
    {
        if (stub->wind)
            call_resume_wind(stub);
        else
            call_resume_unwind(stub);
    }

    THIS = old_THIS;

out:
    return;
}
