/* -*-  mode:c; tab-width:8; c-basic-offset:8; indent-tabs-mode:nil;  -*- */
/*
   Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.

   This program 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 Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/*
 * High level api to nfs filesystems
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef AROS
#include "aros_compat.h"
#endif

#ifdef PS2_EE
#include "ps2_compat.h"
#endif

#ifdef PS3_PPU
#include "ps3_compat.h"
#endif

#ifdef WIN32
#include <win32/win32_compat.h>
#endif

#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif

#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif

#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif

#ifdef HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif

#if defined(__ANDROID__) && !defined(HAVE_SYS_STATVFS_H)
#define statvfs statfs
#endif

#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif

#ifdef HAVE_POLL_H
#include <poll.h>
#endif

#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif

#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>

#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif

#if defined(__sun)
#include <sys/sockio.h>
#endif

#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif

#include "libnfs-zdr.h"
#include "libnfs.h"
#include "libnfs-raw.h"
#include "libnfs-raw-mount.h"
#include "libnfs-raw-nfs.h"
#include "libnfs-raw-nfs4.h"
#include "libnfs-private.h"

struct sync_cb_data {
	int is_finished;
	int status;
	uint64_t offset;
	void *return_data;
	int return_int;
	const char *call;
#ifdef HAVE_MULTITHREADING
        int has_sem;
        libnfs_sem_t wait_sem;
#endif /* HAVE_MULTITHREADING */
};

static inline int
nfs_init_cb_data(struct nfs_context **nfs, struct sync_cb_data *cb_data)
{
	cb_data->is_finished = 0;
#ifdef HAVE_MULTITHREADING
        if (nfs && (*nfs)->rpc->multithreading_enabled && (*nfs)->master_ctx == NULL) {
                struct nfs_thread_context *ntc;

                for(ntc = (*nfs)->nfsi->thread_ctx; ntc; ntc = ntc->next) {
                        if (nfs_mt_get_tid() == ntc->tid) {
                                break;
                        }
                }
                if (ntc) {
                        *nfs = &ntc->nfs;
                } else {
                        ntc = calloc(1, sizeof(struct nfs_thread_context));
                        if (ntc == NULL) {
                                return -1;
                        }
                        nfs_mt_mutex_lock(&(*nfs)->rpc->rpc_mutex);
                        ntc->next = (*nfs)->nfsi->thread_ctx;
                        ntc->tid = nfs_mt_get_tid();
                        (*nfs)->nfsi->thread_ctx = ntc;
                        nfs_mt_mutex_unlock(&(*nfs)->rpc->rpc_mutex);
                        memcpy(&ntc->nfs, *nfs, sizeof(struct nfs_context));
                        ntc->nfs.error_string = NULL;
                        ntc->nfs.master_ctx = *nfs;

                        *nfs = &ntc->nfs;
                }
        }

        /*
         * Create a semaphore and initialize it to zero. So that we
         * can wait for it and immetiately block until the service thread
         * has received the reply.
         */
        if (nfs_mt_sem_init(&cb_data->wait_sem, 0)) {
                if (nfs && *nfs) {
                        nfs_set_error(*nfs, "Failed to initialize semaphore");
                }
                return -1;
        }
        cb_data->has_sem = 1;
#endif /* HAVE_MULTITHREADING */
        return 0;
}

static inline void
nfs_destroy_cb_sem(struct sync_cb_data *cb_data)
{
#ifdef HAVE_MULTITHREADING
        if (cb_data->has_sem) {
                nfs_mt_sem_destroy(&cb_data->wait_sem);
        }
        cb_data->has_sem = 0;
#endif
}        

static inline void
cb_data_is_finished(struct sync_cb_data *cb_data, int status)
{
        cb_data->is_finished = 1;
	cb_data->status = status;
#ifdef HAVE_MULTITHREADING
        if (cb_data->has_sem) {
                nfs_mt_sem_post(&cb_data->wait_sem);
        }
#endif
}

static void
wait_for_reply(struct rpc_context *rpc, struct sync_cb_data *cb_data)
{
	struct pollfd pfd;
	int revents;
	int ret;
	uint64_t timeout;

	assert(rpc->magic == RPC_CONTEXT_MAGIC);

	if (rpc->timeout > 0) {
		timeout = rpc_current_time() + rpc->timeout;
#ifndef HAVE_CLOCK_GETTIME
		/* If we do not have GETTIME we fallback to time() which
		 * has 1s granularity for its timestamps.
		 * We thus need to bump the timeout by 1000ms
		 * so that we break if timeout is within 1.0 - 2.0 seconds.
		 * Otherwise setting a 1s timeout would trigger within
		 * 0.001 - 1.0s.
		 */
		timeout += 1000;
#endif
	}
	else {
		timeout = 0;
	}

	while (!cb_data->is_finished) {

		pfd.fd      = rpc_get_fd(rpc);
		pfd.events  = rpc_which_events(rpc);
		pfd.revents = 0;

		ret = poll(&pfd, 1, rpc->poll_timeout);
		if (ret < 0) {
			rpc_set_error(rpc, "Poll failed");
			revents = -1;
		} else {
			revents = pfd.revents;
		}

		if (rpc_service(rpc, revents) < 0) {
			if (revents != -1)
				rpc_set_error(rpc, "rpc_service failed");
			cb_data->status = -EIO;
			break;
		}

		if (rpc_get_fd(rpc) == -1) {
			rpc_set_error(rpc, "Socket closed");
			break;
		}

		if (timeout > 0 && rpc_current_time() > timeout) {
			rpc_set_error(rpc, "Timeout reached");
			break;
		}
	}
}

static void
wait_for_nfs_reply(struct nfs_context *nfs, struct sync_cb_data *cb_data)
{
	struct pollfd pfd;
	int revents;
	int ret;

#ifdef HAVE_MULTITHREADING
        if(nfs->rpc->multithreading_enabled) {
                nfs_mt_sem_wait(&cb_data->wait_sem);
                return;
        }
#endif
	while (!cb_data->is_finished) {

		pfd.fd = nfs_get_fd(nfs);
		pfd.events = nfs_which_events(nfs);
		pfd.revents = 0;

		ret = poll(&pfd, 1, nfs->rpc->poll_timeout);
		if (ret < 0) {
			nfs_set_error(nfs, "Poll failed");
			revents = -1;
		} else {
			revents = pfd.revents;
		}

		if (nfs_service(nfs, revents) < 0) {
			if (revents != -1)
				nfs_set_error(nfs, "nfs_service failed");
			cb_data->status = -EIO;
                        rpc_error_all_pdus(nfs->rpc, "RPC ERROR: Failed to reconnect async");
			break;
		}
	}
}



/*
 * connect to the server and mount the export
 */
static void
mount_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "%s: %s",
                              __FUNCTION__, nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

static int
_nfs_mount(struct nfs_context *nfs, const char *server, const char *export)
{
	struct sync_cb_data cb_data;
	struct rpc_context *rpc = nfs_get_rpc_context(nfs);

	assert(rpc->magic == RPC_CONTEXT_MAGIC);

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_mount_async(nfs, server, export, mount_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_mount_async failed. %s",
			      nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	/* Dont want any more callbacks even if the socket is closed */
	rpc->connect_cb = NULL;

	/* Ensure that no RPCs are pending. In error case (e.g. timeout in
	 * wait_for_nfs_reply()) we can disconnect; in success case all RPCs
	 * are completed by definition.
	 */
	if (cb_data.status) {
		rpc_disconnect(rpc, "failed mount");
	}

	return cb_data.status;
}

int
nfs_mount(struct nfs_context *nfs, const char *server, const char *export)
{
        int ret;
        ret = _nfs_mount(nfs, server, export);

        /*
         * Mount using default v3 failed, try v4 instead
         */
        if (ret && nfs->nfsi->default_version) {
                free(nfs->nfsi->rootfh.val);
                nfs->nfsi->rootfh.len = 0;
                nfs->nfsi->version = NFS_V4;
                rpc_disconnect(nfs->rpc, "disconnect to try different dialect");
                ret = _nfs_mount(nfs, server, export);
        }

        return ret;
}

/*
 * unregister the mount
 */
static void
umount_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "%s: %s",
                              __FUNCTION__, nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_umount(struct nfs_context *nfs)
{
	struct sync_cb_data cb_data;
	struct rpc_context *rpc = nfs_get_rpc_context(nfs);

	assert(rpc->magic == RPC_CONTEXT_MAGIC);

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_umount_async(nfs, umount_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_umount_async failed. %s",
			      nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	/* Dont want any more callbacks even if the socket is closed */
	rpc->connect_cb = NULL;

	/* Ensure that no RPCs are pending. In error case (e.g. timeout in
	 * wait_for_nfs_reply()) we can disconnect; in success case all RPCs
	 * are completed by definition.
	 */
	if (cb_data.status) {
		rpc_disconnect(rpc, "failed mount");
	}

	return cb_data.status;
}


/*
 * stat()
 */
static void
stat_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "stat call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}
#ifdef WIN32
	memcpy(cb_data->return_data, data, sizeof(struct __stat64));
#else
        memcpy(cb_data->return_data, data, sizeof(struct stat));
#endif

 finished:
        cb_data_is_finished(cb_data, status);
}

int
#ifdef WIN32
nfs_stat(struct nfs_context *nfs, const char *path, struct __stat64 *st)
#else
nfs_stat(struct nfs_context *nfs, const char *path, struct stat *st)
#endif
{
	struct sync_cb_data cb_data;

	cb_data.return_data = st;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_stat_async(nfs, path, stat_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_stat_async failed");
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

static void
stat64_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "stat call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}
	memcpy(cb_data->return_data, data, sizeof(struct nfs_stat_64));

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_stat64(struct nfs_context *nfs, const char *path, struct nfs_stat_64 *st)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = st;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_stat64_async(nfs, path, stat64_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_stat64_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

int
nfs_lstat64(struct nfs_context *nfs, const char *path, struct nfs_stat_64 *st)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = st;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_lstat64_async(nfs, path, stat64_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_lstat64_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * open()
 */
static void
open_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;
	struct nfsfh *fh, **nfsfh;

	if (status < 0) {
		nfs_set_error(nfs, "open call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

	fh    = data;
	nfsfh = cb_data->return_data;
	*nfsfh = fh;

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_open(struct nfs_context *nfs, const char *path, int flags,
         struct nfsfh **nfsfh)
{
	struct sync_cb_data cb_data;
        int retry = 0;
        struct nfs_context *onfs = nfs;
        
 try_again:
        nfs = onfs;
	cb_data.return_data = nfsfh;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

 	if (nfs_open_async(nfs, path, flags, open_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_open_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

        if (cb_data.status == -EIO && retry < 10) {
                retry++;
                goto try_again;
        }
	return cb_data.status;
}

int
nfs_open2(struct nfs_context *nfs, const char *path, int flags,
          int mode, struct nfsfh **nfsfh)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = nfsfh;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_open2_async(nfs, path, flags, mode, open_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_open2_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * chdir()
 */
static void
chdir_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "chdir call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_chdir(struct nfs_context *nfs, const char *path)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_chdir_async(nfs, path, chdir_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_chdir_async failed with %s",
			nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * pread()
 */
static void
pread_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "%s call failed with \"%s\"", cb_data->call,
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_pread(struct nfs_context *nfs, struct nfsfh *nfsfh,
          void *buf, size_t count, uint64_t offset)
{
	struct sync_cb_data cb_data;

	cb_data.call = "pread";
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_pread_async(nfs, nfsfh, buf, count, offset,
                            pread_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_pread_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * read()
 */
int
nfs_read(struct nfs_context *nfs, struct nfsfh *nfsfh,
         void *buf, size_t count)
{
	struct sync_cb_data cb_data;

	cb_data.call = "read";
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_read_async(nfs, nfsfh, buf, count, pread_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_read_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * close()
 */
static void
close_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "close call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_close(struct nfs_context *nfs, struct nfsfh *nfsfh)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_close_async(nfs, nfsfh, close_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_close_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * fstat()
 */
int
#ifdef WIN32
nfs_fstat(struct nfs_context *nfs, struct nfsfh *nfsfh, struct __stat64 *st)
#else
nfs_fstat(struct nfs_context *nfs, struct nfsfh *nfsfh, struct stat *st)
#endif
{
	struct sync_cb_data cb_data;

	cb_data.return_data = st;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_fstat_async(nfs, nfsfh, stat_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_fstat_async failed");
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * fstat64()
 */
int
nfs_fstat64(struct nfs_context *nfs, struct nfsfh *nfsfh,
            struct nfs_stat_64 *st)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = st;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_fstat64_async(nfs, nfsfh, stat64_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_fstat64_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * pwrite()
 */
static void
pwrite_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "%s call failed with \"%s\"",
                              cb_data->call, nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_pwrite(struct nfs_context *nfs, struct nfsfh *nfsfh,
           const void *buf, size_t count, uint64_t offset)
{
	struct sync_cb_data cb_data;

	cb_data.call = "pwrite";
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_pwrite_async(nfs, nfsfh, buf, count, offset, pwrite_cb,
                             &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_pwrite_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * write()
 */
int
nfs_write(struct nfs_context *nfs, struct nfsfh *nfsfh,
          const void *buf, uint64_t count)
{
	struct sync_cb_data cb_data;

	cb_data.call = "write";
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_write_async(nfs, nfsfh, buf, count, pwrite_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_write_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * fsync()
 */
static void
fsync_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "fsync call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_fsync(struct nfs_context *nfs, struct nfsfh *nfsfh)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_fsync_async(nfs, nfsfh, fsync_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_fsync_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * ftruncate()
 */
static void
ftruncate_cb(int status, struct nfs_context *nfs, void *data,
             void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "ftruncate call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_ftruncate(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t length)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_ftruncate_async(nfs, nfsfh, length, ftruncate_cb,
                                &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_ftruncate_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}



/*
 * truncate()
 */
static void
truncate_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "truncate call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int nfs_truncate(struct nfs_context *nfs, const char *path, uint64_t length)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_truncate_async(nfs, path, length, truncate_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_ftruncate_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * mkdir()
 */
static void
mkdir_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "mkdir call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_mkdir(struct nfs_context *nfs, const char *path)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_mkdir_async(nfs, path, mkdir_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_mkdir_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

int
nfs_mkdir2(struct nfs_context *nfs, const char *path, int mode)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_mkdir2_async(nfs, path, mode, mkdir_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_mkdir2_async failed");
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}




/*
 * rmdir()
 */
static void
rmdir_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "rmdir call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int nfs_rmdir(struct nfs_context *nfs, const char *path)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_rmdir_async(nfs, path, rmdir_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_rmdir_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);
        
	return cb_data.status;
}



/*
 * creat()
 */
static void
creat_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;
	struct nfsfh *fh, **nfsfh;

	if (status < 0) {
		nfs_set_error(nfs, "creat call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

	fh    = data;
	nfsfh = cb_data->return_data;
	*nfsfh = fh;

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_creat(struct nfs_context *nfs, const char *path, int mode,
          struct nfsfh **nfsfh)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = nfsfh;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_creat_async(nfs, path, mode, creat_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_create_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * mknod()
 */
static void
mknod_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "mknod call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_mknod(struct nfs_context *nfs, const char *path, int mode, int dev)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_mknod_async(nfs, path, mode, dev, mknod_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_creat_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * unlink()
 */
static void
unlink_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "unlink call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_unlink(struct nfs_context *nfs, const char *path)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_unlink_async(nfs, path, unlink_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_unlink_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}



/*
 * opendir()
 */
static void
opendir_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;
	struct nfsdir *dir, **nfsdir;

	if (status < 0) {
		nfs_set_error(nfs, "opendir call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

	dir     = data;
	nfsdir  = cb_data->return_data;
	*nfsdir = dir;

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_opendir(struct nfs_context *nfs, const char *path, struct nfsdir **nfsdir)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = nfsdir;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_opendir_async(nfs, path, opendir_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_opendir_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * lseek()
 */
static void
lseek_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "lseek call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

	if (cb_data->return_data != NULL) {
		memcpy(cb_data->return_data, data, sizeof(uint64_t));
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_lseek(struct nfs_context *nfs, struct nfsfh *nfsfh, int64_t offset, int whence, uint64_t *current_offset)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = current_offset;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_lseek_async(nfs, nfsfh, offset, whence, lseek_cb,
                            &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_lseek_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * lockf()
 */
static void
lockf_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "lockf call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_lockf(struct nfs_context *nfs, struct nfsfh *nfsfh,
          enum nfs4_lock_op cmd, uint64_t count)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_lockf_async(nfs, nfsfh, cmd, count,
                            lockf_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_lockf_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * fcntl()
 */
static void
fcntl_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "fcntl call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_fcntl(struct nfs_context *nfs, struct nfsfh *nfsfh,
          enum nfs4_fcntl_op cmd, void *arg)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_fcntl_async(nfs, nfsfh, cmd, arg,
                            fcntl_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_fcntl_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * statvfs()
 */
static void
statvfs_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "statvfs call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

	memcpy(cb_data->return_data, data, sizeof(struct statvfs));

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_statvfs(struct nfs_context *nfs, const char *path, struct statvfs *svfs)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = svfs;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_statvfs_async(nfs, path, statvfs_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_statvfs_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * statvfs64()
 */
static void
statvfs64_cb(int status, struct nfs_context *nfs, void *data,
             void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "statvfs64 call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

	memcpy(cb_data->return_data, data, sizeof(struct nfs_statvfs_64));

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_statvfs64(struct nfs_context *nfs, const char *path,
              struct nfs_statvfs_64 *svfs)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = svfs;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_statvfs64_async(nfs, path, statvfs64_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_statvfs64_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * readlink()
 */
static void
readlink_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "readlink call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

	if (strlen(data) > (size_t)cb_data->return_int) {
		nfs_set_error(nfs, "Too small buffer for readlink");
		cb_data->status = -ENAMETOOLONG;
                goto finished;
	}

	memcpy(cb_data->return_data, data, strlen(data)+1);

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_readlink(struct nfs_context *nfs, const char *path, char *buf, int bufsize)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = buf;
	cb_data.return_int  = bufsize;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_readlink_async(nfs, path, readlink_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_readlink_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

static void
readlink2_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;
	char **bufptr;
	char *buf;

	if (status < 0) {
		nfs_set_error(nfs, "readlink call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

	buf = strdup(data);
	if (buf == NULL) {
		cb_data->status = errno ? -errno : -ENOMEM;
                goto finished;
	}

	bufptr = cb_data->return_data;
	if (bufptr)
		*bufptr = buf;

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_readlink2(struct nfs_context *nfs, const char *path, char **bufptr)
{
	struct sync_cb_data cb_data;

	*bufptr = NULL;
	cb_data.return_data = bufptr;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_readlink_async(nfs, path, readlink2_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_readlink_async failed");
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}



/*
 * chmod()
 */
static void
chmod_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "chmod call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_chmod(struct nfs_context *nfs, const char *path, int mode)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_chmod_async(nfs, path, mode, chmod_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_chmod_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

int
nfs_lchmod(struct nfs_context *nfs, const char *path, int mode)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_lchmod_async(nfs, path, mode, chmod_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_lchmod_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}




/*
 * fchmod()
 */
static void
fchmod_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "fchmod call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_fchmod(struct nfs_context *nfs, struct nfsfh *nfsfh, int mode)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_fchmod_async(nfs, nfsfh, mode, fchmod_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_fchmod_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}




/*
 * chown()
 */
static void
chown_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "chown call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_chown(struct nfs_context *nfs, const char *path, int uid, int gid)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_chown_async(nfs, path, uid, gid, chown_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_chown_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * lchown()
 */
int
nfs_lchown(struct nfs_context *nfs, const char *path, int uid, int gid)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_lchown_async(nfs, path, uid, gid, chown_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_lchown_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

/*
 * fchown()
 */
static void
fchown_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "fchown call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_fchown(struct nfs_context *nfs, struct nfsfh *nfsfh, int uid, int gid)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_fchown_async(nfs, nfsfh, uid, gid, fchown_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_fchown_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}



/*
 * utimes()
 */
static void
utimes_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "utimes call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_utimes(struct nfs_context *nfs, const char *path, struct timeval *times)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_utimes_async(nfs, path, times, utimes_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_utimes_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

int
nfs_lutimes(struct nfs_context *nfs, const char *path, struct timeval *times)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_lutimes_async(nfs, path, times, utimes_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_lutimes_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}



/*
 * utime()
 */
static void
utime_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "utime call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_utime(struct nfs_context *nfs, const char *path, struct utimbuf *times)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_utime_async(nfs, path, times, utime_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_utimes_async failed");
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * access()
 */
static void
access_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "access call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_access(struct nfs_context *nfs, const char *path, int mode)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_access_async(nfs, path, mode, access_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_access_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}



/*
 * access2()
 */
static void
access2_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "access2 call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_access2(struct nfs_context *nfs, const char *path)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_access2_async(nfs, path, access2_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_access2_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}



/*
 * symlink()
 */
static void
symlink_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "symlink call failed with \"%s\"",
			      nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_symlink(struct nfs_context *nfs, const char *target, const char *linkname)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_symlink_async(nfs, target, linkname, symlink_cb,
			      &cb_data) != 0) {
                nfs_set_error(nfs, "nfs_symlink_async failed: %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * rename()
 */
static void
rename_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "rename call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_rename(struct nfs_context *nfs, const char *oldpath, const char *newpath)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_rename_async(nfs, oldpath, newpath, rename_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_rename_async failed: %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}



/*
 * link()
 */
static void
link_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;

	if (status < 0) {
		nfs_set_error(nfs, "link call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs_link(struct nfs_context *nfs, const char *oldpath, const char *newpath)
{
	struct sync_cb_data cb_data;

        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs_link_async(nfs, oldpath, newpath, link_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_link_async failed: %s",
			      nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * nfs3_getacl()
 */
void nfs3_acl_free(fattr3_acl *nfs3acl)
{
	if (nfs3acl == NULL) {
		return;
	}
	if (nfs3acl->ace) {
		free(nfs3acl->ace);
	}
	if (nfs3acl->default_ace) {
		free(nfs3acl->default_ace);
	}
}

static void
nfs3_getacl_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;
        fattr3_acl *src = data;
        fattr3_acl *dst = cb_data->return_data;

	if (status < 0) {
		nfs_set_error(nfs, "getacl call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}
        memcpy(dst, src, sizeof(fattr3_acl));
        src->ace = NULL; /* steal the pointer to ACEs */
        src->default_ace = NULL; /* steal the pointer to Default ACEs */

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs3_getacl(struct nfs_context *nfs, struct nfsfh *nfsfh,
            fattr3_acl *acl)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = acl;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs3_getacl_async(nfs, nfsfh, nfs3_getacl_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_getacl_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}


/*
 * nfs4_getacl()
 */
void nfs4_acl_free(fattr4_acl *acl)
{
        int i;

        for (i = 0; i < acl->fattr4_acl_len; i++) {
                free(acl->fattr4_acl_val[i].who.utf8string_val);
        }
        free(acl->fattr4_acl_val);
}

static void
nfs4_getacl_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
{
	struct sync_cb_data *cb_data = private_data;
        fattr4_acl *src = data;
        fattr4_acl *dst = cb_data->return_data;
        int i;

	if (status < 0) {
		nfs_set_error(nfs, "getacl call failed with \"%s\"",
                              nfs_get_error(nfs));
                goto finished;
	}
        dst->fattr4_acl_len = src->fattr4_acl_len;
        dst->fattr4_acl_val = calloc(dst->fattr4_acl_len, sizeof(nfsace4));
        if (dst->fattr4_acl_val == NULL) {
                cb_data->status = -ENOMEM;
		nfs_set_error(nfs, "Failed to allocate fattr4_acl_val");
                goto finished;
        }                
        for (i = 0; i < dst->fattr4_acl_len; i++) {
                dst->fattr4_acl_val[i].type = src->fattr4_acl_val[i].type;
                dst->fattr4_acl_val[i].flag = src->fattr4_acl_val[i].flag;
                dst->fattr4_acl_val[i].access_mask = src->fattr4_acl_val[i].access_mask;
                dst->fattr4_acl_val[i].who.utf8string_len = src->fattr4_acl_val[i].who.utf8string_len;
                dst->fattr4_acl_val[i].who.utf8string_val = calloc(dst->fattr4_acl_val[i].who.utf8string_len + 1, 1);
                if (dst->fattr4_acl_val[i].who.utf8string_val == NULL) {
                        cb_data->status = -ENOMEM;
                        nfs4_acl_free(dst);
                        nfs_set_error(nfs, "Failed to allocate acl name");
                        goto finished;
                }
                memcpy(dst->fattr4_acl_val[i].who.utf8string_val,
                       src->fattr4_acl_val[i].who.utf8string_val,
                       dst->fattr4_acl_val[i].who.utf8string_len);
        }

 finished:
        cb_data_is_finished(cb_data, status);
}

int
nfs4_getacl(struct nfs_context *nfs, struct nfsfh *nfsfh,
            fattr4_acl *acl)
{
	struct sync_cb_data cb_data;

	cb_data.return_data = acl;
        if (nfs_init_cb_data(&nfs, &cb_data)) {
                return -1;
        }

	if (nfs4_getacl_async(nfs, nfsfh, nfs4_getacl_cb, &cb_data) != 0) {
		nfs_set_error(nfs, "nfs_getacl_async failed. %s",
                              nfs_get_error(nfs));
                nfs_destroy_cb_sem(&cb_data);
		return -1;
	}

	wait_for_nfs_reply(nfs, &cb_data);
        nfs_destroy_cb_sem(&cb_data);

	return cb_data.status;
}

void
mount_getexports_cb(struct rpc_context *mount_context, int status, void *data,
                    void *private_data)
{
	struct sync_cb_data *cb_data = private_data;
	exports export;

	assert(mount_context->magic == RPC_CONTEXT_MAGIC);

	cb_data->return_data = NULL;

	if (status != 0) {
		rpc_set_error(mount_context, "mount/export call failed with "
                              "\"%s\"", rpc_get_error(mount_context));
                goto finished;
	}

	export = *(exports *)data;
	while (export != NULL) {
		exports new_export;

		new_export = calloc(1, sizeof(*new_export));
		new_export->ex_dir  = strdup(export->ex_dir);
		new_export->ex_next = cb_data->return_data;

		cb_data->return_data = new_export;

		export = export->ex_next;
	}

 finished:
        cb_data_is_finished(cb_data, status);
}

struct exportnode *
mount_getexports_timeout(const char *server, int timeout)
{
	struct sync_cb_data cb_data;
	struct rpc_context *rpc;


	cb_data.return_data = NULL;
        if (nfs_init_cb_data(NULL, &cb_data)) {
                return NULL;
        }

	rpc = rpc_init_context();
	rpc_set_timeout(rpc, timeout);
	if (mount_getexports_async(rpc, server, mount_getexports_cb,
                                   &cb_data) != 0) {
		rpc_destroy_context(rpc);
                nfs_destroy_cb_sem(&cb_data);
		return NULL;
	}

	wait_for_reply(rpc, &cb_data);
        nfs_destroy_cb_sem(&cb_data);
	rpc_destroy_context(rpc);

	return cb_data.return_data;
}

struct exportnode *
mount_getexports(const char *server)
{
	return mount_getexports_timeout(server, -1);
}

void
mount_free_export_list(struct exportnode *exp)
{
	struct exportnode *tmp;

	while ((tmp = exp)) {
		exp = exp->ex_next;
		free(tmp->ex_dir);
		free(tmp);
	}
}

#if !defined(NO_SRV_AUTOSCAN)

void
free_nfs_srvr_list(struct nfs_server_list *srv)
{
	while (srv != NULL) {
		struct nfs_server_list *next = srv->next;

		free(srv->addr);
		free(srv);
		srv = next;
	}
}

struct nfs_list_data {
       int status;
       struct nfs_server_list *srvrs;
};

void
callit_cb(struct rpc_context *rpc, int status, void *data _U_,
          void *private_data)
{
	struct nfs_list_data *srv_data = private_data;
	struct sockaddr *sin;
	char hostdd[16];
	struct nfs_server_list *srvr;

	assert(rpc->magic == RPC_CONTEXT_MAGIC);

	if (status == RPC_STATUS_CANCEL) {
		return;
	}
	if (status != 0) {
		srv_data->status = -1;
		return;
	}

	sin = rpc_get_recv_sockaddr(rpc);
	if (sin == NULL) {
		rpc_set_error(rpc, "failed to get sockaddr in CALLIT callback");
		srv_data->status = -1;
		return;
	}

	if (getnameinfo(sin, sizeof(struct sockaddr_in), &hostdd[0],
                        sizeof(hostdd), NULL, 0, NI_NUMERICHOST) < 0) {
		rpc_set_error(rpc, "getnameinfo failed in CALLIT callback");
		srv_data->status = -1;
		return;
	}

	/* check for dupes */
	for (srvr = srv_data->srvrs; srvr; srvr = srvr->next) {
		if (!strcmp(hostdd, srvr->addr)) {
			return;
		}
	}

	srvr = malloc(sizeof(struct nfs_server_list));
	if (srvr == NULL) {
		rpc_set_error(rpc, "Malloc failed when allocating server "
                              "structure");
		srv_data->status = -1;
		return;
	}

	srvr->addr = strdup(hostdd);
	if (srvr->addr == NULL) {
		rpc_set_error(rpc, "Strdup failed when allocating server "
                              "structure");
		free(srvr);
		srv_data->status = -1;
		return;
	}

	srvr->next = srv_data->srvrs;
	srv_data->srvrs = srvr;
}

#ifdef WIN32

static int
send_nfsd_probes(struct rpc_context *rpc, INTERFACE_INFO *InterfaceList,
                 int numIfs, struct nfs_list_data *data)
{
  int i=0;

  assert(rpc->magic == RPC_CONTEXT_MAGIC);

  for(i = 0; i < numIfs; i++)
  {
    SOCKADDR *pAddress;
    char bcdd[16];
    unsigned long nFlags = 0;

    pAddress = (SOCKADDR *) & (InterfaceList[i].iiBroadcastAddress);

    if(pAddress->sa_family != AF_INET)
      continue;

    nFlags = InterfaceList[i].iiFlags;

    if (!(nFlags & IFF_UP))
    {
      continue;
    }

    if (nFlags & IFF_LOOPBACK)
    {
      continue;
    }

    if (!(nFlags & IFF_BROADCAST))
    {
      continue;
    }

    if (getnameinfo(pAddress, sizeof(struct sockaddr_in), &bcdd[0], sizeof(bcdd), NULL, 0, NI_NUMERICHOST) < 0)
    {
      continue;
    }

    if (rpc_set_udp_destination(rpc, bcdd, 111, 1) < 0)
    {
      return -1;
    }

    if (rpc_pmap2_callit_task(rpc, MOUNT_PROGRAM, 2, 0, NULL, 0, callit_cb, data) == NULL)
    {
      return -1;
    }
  }
  return 0;
}

struct nfs_server_list *
nfs_find_local_servers(void)
{
  struct rpc_context *rpc;
  struct nfs_list_data data = {0, NULL};
  struct timeval tv_start, tv_current;
  int loop;
  struct pollfd pfd;
  INTERFACE_INFO InterfaceList[20];
  unsigned long nBytesReturned;
  int nNumInterfaces = 0;

  rpc = rpc_init_udp_context();
  if (rpc == NULL)
  {
    return NULL;
  }

  if (rpc_bind_udp(rpc, "0.0.0.0", 0) < 0)
  {
    rpc_destroy_context(rpc);
    return NULL;
  }

  if (WSAIoctl(rpc_get_fd(rpc), SIO_GET_INTERFACE_LIST, 0, 0, &InterfaceList, sizeof(InterfaceList), &nBytesReturned, 0, 0) == SOCKET_ERROR)
  {
    return NULL;
  }

  nNumInterfaces = nBytesReturned / sizeof(INTERFACE_INFO);

  for (loop=0; loop<3; loop++)
  {
    if (send_nfsd_probes(rpc, InterfaceList, nNumInterfaces, &data) != 0)
    {
      rpc_destroy_context(rpc);
      return NULL;
    }

    win32_gettimeofday(&tv_start, NULL);
    for(;;)
    {
      int mpt;

      pfd.fd = rpc_get_fd(rpc);
      pfd.events = rpc_which_events(rpc);

      win32_gettimeofday(&tv_current, NULL);
      mpt = 1000
      -    (tv_current.tv_sec *1000 + tv_current.tv_usec / 1000)
      +    (tv_start.tv_sec *1000 + tv_start.tv_usec / 1000);

      if (poll(&pfd, 1, mpt) < 0)
      {
        free_nfs_srvr_list(data.srvrs);
        rpc_destroy_context(rpc);
        return NULL;
      }
      if (pfd.revents == 0)
      {
        break;
      }

      if (rpc_service(rpc, pfd.revents) < 0)
      {
        break;
      }
    }
  }

  rpc_destroy_context(rpc);

  if (data.status != 0)
  {
    free_nfs_srvr_list(data.srvrs);
    return NULL;
  }
  return data.srvrs;
}
#else

static int
send_nfsd_probes(struct rpc_context *rpc, struct ifconf *ifc,
                 struct nfs_list_data *data)
{
	char *ptr;

	assert(rpc->magic == RPC_CONTEXT_MAGIC);

	for (ptr =(char *)(ifc->ifc_buf);
             ptr < (char *)(ifc->ifc_buf) + ifc->ifc_len;
             ) {
		struct ifreq ifr;
		char bcdd[16];

		memcpy(&ifr, ptr, sizeof(struct ifreq));
#ifdef HAVE_SOCKADDR_LEN
		if (ifr.ifr_addr.sa_len > sizeof(struct sockaddr)) {
			ptr += sizeof(ifr.ifr_name) + ifr.ifr_addr.sa_len;
		} else {
			ptr += sizeof(ifr.ifr_name) + sizeof(struct sockaddr);
		}
#else
		ptr += sizeof(struct ifreq);
#endif

		if (ifr.ifr_addr.sa_family != AF_INET) {
			continue;
		}
#ifndef PS3_PPU
		if (ioctl(rpc_get_fd(rpc), SIOCGIFFLAGS, &ifr) < 0) {
			return -1;
		}
#endif
		if (!(ifr.ifr_flags & IFF_UP)) {
			continue;
		}
		if (ifr.ifr_flags & IFF_LOOPBACK) {
			continue;
		}
		if (!(ifr.ifr_flags & IFF_BROADCAST)) {
			continue;
		}
#ifndef PS3_PPU
		if (ioctl(rpc_get_fd(rpc), SIOCGIFBRDADDR, &ifr) < 0) {
			continue;
		}
#endif
		if (getnameinfo(&ifr.ifr_broadaddr, sizeof(struct sockaddr_in),
                                &bcdd[0], sizeof(bcdd), NULL, 0,
                                NI_NUMERICHOST) < 0) {
			continue;
		}
		if (rpc_set_udp_destination(rpc, bcdd, 111, 1) < 0) {
			return -1;
		}

		if (rpc_pmap2_callit_task(rpc, MOUNT_PROGRAM, 2, 0, NULL, 0,
                                           callit_cb, data) == NULL) {
			return -1;
		}
	}

	return 0;
}

struct nfs_server_list *
nfs_find_local_servers(void)
{
	struct rpc_context *rpc;
	struct nfs_list_data data = {0, NULL};
	struct timeval tv_start, tv_current;
	struct ifconf ifc;
	int size, loop;
	struct pollfd pfd;

	rpc = rpc_init_udp_context();
	if (rpc == NULL) {
		return NULL;
	}

	if (rpc_bind_udp(rpc, "0.0.0.0", 0) < 0) {
		rpc_destroy_context(rpc);
		return NULL;
	}


	/* get list of all interfaces */
	size = sizeof(struct ifreq);
	ifc.ifc_buf = NULL;
	ifc.ifc_len = size;

	while(ifc.ifc_len > (size - sizeof(struct ifreq))) {
		size *= 2;

		free(ifc.ifc_buf);
		ifc.ifc_len = size;
		ifc.ifc_buf = calloc(1, size);
#ifndef PS3_PPU
		if (ioctl(rpc_get_fd(rpc), SIOCGIFCONF, (caddr_t)&ifc) < 0) {
			rpc_destroy_context(rpc);
			free(ifc.ifc_buf);
			return NULL;
		}
#endif
	}

	for (loop=0; loop<3; loop++) {
		if (send_nfsd_probes(rpc, &ifc, &data) != 0) {
			rpc_destroy_context(rpc);
			free(ifc.ifc_buf);
			return NULL;
		}

		gettimeofday(&tv_start, NULL);
		for(;;) {
			int mpt;

			pfd.fd = rpc_get_fd(rpc);
			pfd.events = rpc_which_events(rpc);

			gettimeofday(&tv_current, NULL);
			mpt = 1000
			-    (tv_current.tv_sec *1000 + tv_current.tv_usec / 1000)
			+    (tv_start.tv_sec *1000 + tv_start.tv_usec / 1000);

			if (poll(&pfd, 1, mpt) < 0) {
				free_nfs_srvr_list(data.srvrs);
				rpc_destroy_context(rpc);
				return NULL;
			}
			if (pfd.revents == 0) {
				break;
			}

			if (rpc_service(rpc, pfd.revents) < 0) {
				break;
			}
		}
	}

	free(ifc.ifc_buf);
	rpc_destroy_context(rpc);

	if (data.status != 0) {
		free_nfs_srvr_list(data.srvrs);
		return NULL;
	}
	return data.srvrs;
}
#endif /* WIN32 */

#endif /* !defined(NO_SRV_AUTOSCAN) */
