modules/vfs_default.c

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/*
   Unix SMB/CIFS implementation.
   Wrap disk only vfs functions to sidestep dodgy compilers.
   Copyright (C) Tim Potter 1998
   Copyright (C) Jeremy Allison 2007

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS

/* Check for NULL pointer parameters in vfswrap_* functions */

/* We don't want to have NULL function pointers lying around.  Someone
   is sure to try and execute them.  These stubs are used to prevent
   this possibility. */

static int vfswrap_connect(vfs_handle_struct *handle,  const char *service, const char *user)
{
    return 0;    /* Return >= 0 for success */
}

static void vfswrap_disconnect(vfs_handle_struct *handle)
{
}

/* Disk operations */

static SMB_BIG_UINT vfswrap_disk_free(vfs_handle_struct *handle,  const char *path, BOOL small_query, SMB_BIG_UINT *bsize,
                               SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize)
{
        SMB_BIG_UINT result;

        result = sys_disk_free(handle->conn, path, small_query, bsize, dfree, dsize);
        return result;
}

static int vfswrap_get_quota(struct vfs_handle_struct *handle,  enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
{
#ifdef HAVE_SYS_QUOTAS
        int result;

        START_PROFILE(syscall_get_quota);
        result = sys_get_quota(handle->conn->connectpath, qtype, id, qt);
        END_PROFILE(syscall_get_quota);
        return result;
#else
        errno = ENOSYS;
        return -1;
#endif
}

static int vfswrap_set_quota(struct vfs_handle_struct *handle,  enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
{
#ifdef HAVE_SYS_QUOTAS
        int result;

        START_PROFILE(syscall_set_quota);
        result = sys_set_quota(handle->conn->connectpath, qtype, id, qt);
        END_PROFILE(syscall_set_quota);
        return result;
#else
        errno = ENOSYS;
        return -1;
#endif
}

static int vfswrap_get_shadow_copy_data(struct vfs_handle_struct *handle, struct files_struct *fsp, SHADOW_COPY_DATA *shadow_copy_data, BOOL labels)
{
        errno = ENOSYS;
        return -1;  /* Not implemented. */
}

static int vfswrap_statvfs(struct vfs_handle_struct *handle,  const char *path, vfs_statvfs_struct *statbuf)
{
        return sys_statvfs(path, statbuf);
}

/* Directory operations */

static SMB_STRUCT_DIR *vfswrap_opendir(vfs_handle_struct *handle,  const char *fname, const char *mask, uint32 attr)
{
        SMB_STRUCT_DIR *result;

        START_PROFILE(syscall_opendir);
        result = sys_opendir(fname);
        END_PROFILE(syscall_opendir);
        return result;
}

static SMB_STRUCT_DIRENT *vfswrap_readdir(vfs_handle_struct *handle,  SMB_STRUCT_DIR *dirp)
{
        SMB_STRUCT_DIRENT *result;

        START_PROFILE(syscall_readdir);
        result = sys_readdir(dirp);
        END_PROFILE(syscall_readdir);
        return result;
}

static void vfswrap_seekdir(vfs_handle_struct *handle,  SMB_STRUCT_DIR *dirp, long offset)
{
        START_PROFILE(syscall_seekdir);
        sys_seekdir(dirp, offset);
        END_PROFILE(syscall_seekdir);
}

static long vfswrap_telldir(vfs_handle_struct *handle,  SMB_STRUCT_DIR *dirp)
{
        long result;
        START_PROFILE(syscall_telldir);
        result = sys_telldir(dirp);
        END_PROFILE(syscall_telldir);
        return result;
}

static void vfswrap_rewinddir(vfs_handle_struct *handle,  SMB_STRUCT_DIR *dirp)
{
        START_PROFILE(syscall_rewinddir);
        sys_rewinddir(dirp);
        END_PROFILE(syscall_rewinddir);
}

static int vfswrap_mkdir(vfs_handle_struct *handle,  const char *path, mode_t mode)
{
        int result;
        BOOL has_dacl = False;

        START_PROFILE(syscall_mkdir);

        if (lp_inherit_acls(SNUM(handle->conn)) && (has_dacl = directory_has_default_acl(handle->conn, parent_dirname(path))))
                mode = 0777;

        result = mkdir(path, mode);

        if (result == 0 && !has_dacl) {
                /*
                 * We need to do this as the default behavior of POSIX ACLs
                 * is to set the mask to be the requested group permission
                 * bits, not the group permission bits to be the requested
                 * group permission bits. This is not what we want, as it will
                 * mess up any inherited ACL bits that were set. JRA.
                 */
                int saved_errno = errno; /* We may get ENOSYS */
                if ((SMB_VFS_CHMOD_ACL(handle->conn, path, mode) == -1) && (errno == ENOSYS))
                        errno = saved_errno;
        }

        END_PROFILE(syscall_mkdir);
        return result;
}

static int vfswrap_rmdir(vfs_handle_struct *handle,  const char *path)
{
        int result;

        START_PROFILE(syscall_rmdir);
        result = rmdir(path);
        END_PROFILE(syscall_rmdir);
        return result;
}

static int vfswrap_closedir(vfs_handle_struct *handle,  SMB_STRUCT_DIR *dirp)
{
        int result;

        START_PROFILE(syscall_closedir);
        result = sys_closedir(dirp);
        END_PROFILE(syscall_closedir);
        return result;
}

/* File operations */

static int vfswrap_open(vfs_handle_struct *handle,  const char *fname,
        files_struct *fsp, int flags, mode_t mode)
{
        int result;

        START_PROFILE(syscall_open);
        result = sys_open(fname, flags, mode);
        END_PROFILE(syscall_open);
        return result;
}

static int vfswrap_close(vfs_handle_struct *handle, files_struct *fsp, int fd)
{
        int result;

        START_PROFILE(syscall_close);

        result = close(fd);
        END_PROFILE(syscall_close);
        return result;
}

static ssize_t vfswrap_read(vfs_handle_struct *handle, files_struct *fsp, int fd, void *data, size_t n)
{
        ssize_t result;

        START_PROFILE_BYTES(syscall_read, n);
        result = sys_read(fd, data, n);
        END_PROFILE(syscall_read);
        return result;
}

static ssize_t vfswrap_pread(vfs_handle_struct *handle, files_struct *fsp, int fd, void *data,
                        size_t n, SMB_OFF_T offset)
{
        ssize_t result;

#if defined(HAVE_PREAD) || defined(HAVE_PREAD64)
        START_PROFILE_BYTES(syscall_pread, n);
        result = sys_pread(fd, data, n, offset);
        END_PROFILE(syscall_pread);

        if (result == -1 && errno == ESPIPE) {
                /* Maintain the fiction that pipes can be seeked (sought?) on. */
                result = SMB_VFS_READ(fsp, fd, data, n);
                fsp->fh->pos = 0;
        }

#else /* HAVE_PREAD */
        SMB_OFF_T   curr;
        int lerrno;

        curr = SMB_VFS_LSEEK(fsp, fd, 0, SEEK_CUR);
        if (curr == -1 && errno == ESPIPE) {
                /* Maintain the fiction that pipes can be seeked (sought?) on. */
                result = SMB_VFS_READ(fsp, fd, data, n);
                fsp->fh->pos = 0;
                return result;
        }

        if (SMB_VFS_LSEEK(fsp, fd, offset, SEEK_SET) == -1) {
                return -1;
        }

        errno = 0;
        result = SMB_VFS_READ(fsp, fd, data, n);
        lerrno = errno;

        SMB_VFS_LSEEK(fsp, fd, curr, SEEK_SET);
        errno = lerrno;

#endif /* HAVE_PREAD */

        return result;
}

static ssize_t vfswrap_write(vfs_handle_struct *handle, files_struct *fsp, int fd, const void *data, size_t n)
{
        ssize_t result;

        START_PROFILE_BYTES(syscall_write, n);
        result = sys_write(fd, data, n);
        END_PROFILE(syscall_write);
        return result;
}

static ssize_t vfswrap_pwrite(vfs_handle_struct *handle, files_struct *fsp, int fd, const void *data,
                        size_t n, SMB_OFF_T offset)
{
        ssize_t result;

#if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
        START_PROFILE_BYTES(syscall_pwrite, n);
        result = sys_pwrite(fd, data, n, offset);
        END_PROFILE(syscall_pwrite);

        if (result == -1 && errno == ESPIPE) {
                /* Maintain the fiction that pipes can be sought on. */
                result = SMB_VFS_WRITE(fsp, fd, data, n);
        }

#else /* HAVE_PWRITE */
        SMB_OFF_T   curr;
        int         lerrno;

        curr = SMB_VFS_LSEEK(fsp, fd, 0, SEEK_CUR);
        if (curr == -1) {
                return -1;
        }

        if (SMB_VFS_LSEEK(fsp, fd, offset, SEEK_SET) == -1) {
                return -1;
        }

        result = SMB_VFS_WRITE(fsp, fd, data, n);
        lerrno = errno;

        SMB_VFS_LSEEK(fsp, fd, curr, SEEK_SET);
        errno = lerrno;

#endif /* HAVE_PWRITE */

        return result;
}

static SMB_OFF_T vfswrap_lseek(vfs_handle_struct *handle, files_struct *fsp, int filedes, SMB_OFF_T offset, int whence)
{
        SMB_OFF_T result = 0;

        START_PROFILE(syscall_lseek);

        /* Cope with 'stat' file opens. */
        if (filedes != -1)
                result = sys_lseek(filedes, offset, whence);

        /*
         * We want to maintain the fiction that we can seek
         * on a fifo for file system purposes. This allows
         * people to set up UNIX fifo's that feed data to Windows
         * applications. JRA.
         */

        if((result == -1) && (errno == ESPIPE)) {
                result = 0;
                errno = 0;
        }

        END_PROFILE(syscall_lseek);
        return result;
}

static ssize_t vfswrap_sendfile(vfs_handle_struct *handle, int tofd, files_struct *fsp, int fromfd, const DATA_BLOB *hdr,
                        SMB_OFF_T offset, size_t n)
{
        ssize_t result;

        START_PROFILE_BYTES(syscall_sendfile, n);
        result = sys_sendfile(tofd, fromfd, hdr, offset, n);
        END_PROFILE(syscall_sendfile);
        return result;
}

/*********************************************************
 For rename across filesystems Patch from Warren Birnbaum
 <warrenb@hpcvscdp.cv.hp.com>
**********************************************************/

static int copy_reg(const char *source, const char *dest)
{
        SMB_STRUCT_STAT source_stats;
        int saved_errno;
        int ifd = -1;
        int ofd = -1;

        if (sys_lstat (source, &source_stats) == -1)
                return -1;

        if (!S_ISREG (source_stats.st_mode))
                return -1;

        if((ifd = sys_open (source, O_RDONLY, 0)) < 0)
                return -1;

        if (unlink (dest) && errno != ENOENT)
                return -1;

#ifdef O_NOFOLLOW
        if((ofd = sys_open (dest, O_WRONLY | O_CREAT | O_TRUNC | O_NOFOLLOW, 0600)) < 0 )
#else
        if((ofd = sys_open (dest, O_WRONLY | O_CREAT | O_TRUNC , 0600)) < 0 )
#endif
                goto err;

        if (transfer_file(ifd, ofd, (size_t)-1) == -1)
                goto err;

        /*
         * Try to preserve ownership.  For non-root it might fail, but that's ok.
         * But root probably wants to know, e.g. if NFS disallows it.
         */

#ifdef HAVE_FCHOWN
        if ((fchown(ofd, source_stats.st_uid, source_stats.st_gid) == -1) && (errno != EPERM))
#else
        if ((chown(dest, source_stats.st_uid, source_stats.st_gid) == -1) && (errno != EPERM))
#endif
                goto err;

        /*
         * fchown turns off set[ug]id bits for non-root,
         * so do the chmod last.
         */

#if defined(HAVE_FCHMOD)
        if (fchmod (ofd, source_stats.st_mode & 07777))
#else
        if (chmod (dest, source_stats.st_mode & 07777))
#endif
                goto err;

        if (close (ifd) == -1)
                goto err;

        if (close (ofd) == -1)
                return -1;

        /* Try to copy the old file's modtime and access time.  */
        {
                struct utimbuf tv;

                tv.actime = source_stats.st_atime;
                tv.modtime = source_stats.st_mtime;
                utime(dest, &tv);
        }

        if (unlink (source) == -1)
                return -1;

        return 0;

  err:

        saved_errno = errno;
        if (ifd != -1)
                close(ifd);
        if (ofd != -1)
                close(ofd);
        errno = saved_errno;
        return -1;
}

static int vfswrap_rename(vfs_handle_struct *handle,  const char *oldname, const char *newname)
{
        int result;

        START_PROFILE(syscall_rename);
        result = rename(oldname, newname);
        if ((result == -1) && (errno == EXDEV)) {
                /* Rename across filesystems needed. */
                result = copy_reg(oldname, newname);
        }

        END_PROFILE(syscall_rename);
        return result;
}

static int vfswrap_fsync(vfs_handle_struct *handle, files_struct *fsp, int fd)
{
#ifdef HAVE_FSYNC
        int result;

        START_PROFILE(syscall_fsync);
        result = fsync(fd);
        END_PROFILE(syscall_fsync);
        return result;
#else
        return 0;
#endif
}

static int vfswrap_stat(vfs_handle_struct *handle,  const char *fname, SMB_STRUCT_STAT *sbuf)
{
        int result;

        START_PROFILE(syscall_stat);
        result = sys_stat(fname, sbuf);
        END_PROFILE(syscall_stat);
        return result;
}

static int vfswrap_fstat(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_STRUCT_STAT *sbuf)
{
        int result;

        START_PROFILE(syscall_fstat);
        result = sys_fstat(fd, sbuf);
        END_PROFILE(syscall_fstat);
        return result;
}

int vfswrap_lstat(vfs_handle_struct *handle,  const char *path, SMB_STRUCT_STAT *sbuf)
{
        int result;

        START_PROFILE(syscall_lstat);
        result = sys_lstat(path, sbuf);
        END_PROFILE(syscall_lstat);
        return result;
}

static int vfswrap_unlink(vfs_handle_struct *handle,  const char *path)
{
        int result;

        START_PROFILE(syscall_unlink);
        result = unlink(path);
        END_PROFILE(syscall_unlink);
        return result;
}

static int vfswrap_chmod(vfs_handle_struct *handle,  const char *path, mode_t mode)
{
        int result;

        START_PROFILE(syscall_chmod);

        /*
         * We need to do this due to the fact that the default POSIX ACL
         * chmod modifies the ACL *mask* for the group owner, not the
         * group owner bits directly. JRA.
         */


        {
                int saved_errno = errno; /* We might get ENOSYS */
                if ((result = SMB_VFS_CHMOD_ACL(handle->conn, path, mode)) == 0) {
                        END_PROFILE(syscall_chmod);
                        return result;
                }
                /* Error - return the old errno. */
                errno = saved_errno;
        }

        result = chmod(path, mode);
        END_PROFILE(syscall_chmod);
        return result;
}

static int vfswrap_fchmod(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
{
        int result;

        START_PROFILE(syscall_fchmod);

        /*
         * We need to do this due to the fact that the default POSIX ACL
         * chmod modifies the ACL *mask* for the group owner, not the
         * group owner bits directly. JRA.
         */

        {
                int saved_errno = errno; /* We might get ENOSYS */
                if ((result = SMB_VFS_FCHMOD_ACL(fsp, fd, mode)) == 0) {
                        END_PROFILE(syscall_fchmod);
                        return result;
                }
                /* Error - return the old errno. */
                errno = saved_errno;
        }

#if defined(HAVE_FCHMOD)
        result = fchmod(fd, mode);
#else
        result = -1;
        errno = ENOSYS;
#endif

        END_PROFILE(syscall_fchmod);
        return result;
}

static int vfswrap_chown(vfs_handle_struct *handle,  const char *path, uid_t uid, gid_t gid)
{
        int result;

        START_PROFILE(syscall_chown);
        result = sys_chown(path, uid, gid);
        END_PROFILE(syscall_chown);
        return result;
}

static int vfswrap_fchown(vfs_handle_struct *handle, files_struct *fsp, int fd, uid_t uid, gid_t gid)
{
#ifdef HAVE_FCHOWN
        int result;

        START_PROFILE(syscall_fchown);
        result = fchown(fd, uid, gid);
        END_PROFILE(syscall_fchown);
        return result;
#else
        errno = ENOSYS;
        return -1;
#endif
}

static int vfswrap_chdir(vfs_handle_struct *handle,  const char *path)
{
        int result;

        START_PROFILE(syscall_chdir);
        result = chdir(path);
        END_PROFILE(syscall_chdir);
        return result;
}

static char *vfswrap_getwd(vfs_handle_struct *handle,  char *path)
{
        char *result;

        START_PROFILE(syscall_getwd);
        result = sys_getwd(path);
        END_PROFILE(syscall_getwd);
        return result;
}

/*********************************************************************
 nsec timestamp resolution call. Convert down to whatever the underlying
 system will support.
**********************************************************************/

static int vfswrap_ntimes(vfs_handle_struct *handle, const char *path, const struct timespec ts[2])
{
        int result;

        START_PROFILE(syscall_ntimes);
#if defined(HAVE_UTIMES)
        {
                struct timeval tv[2];
                tv[0] = convert_timespec_to_timeval(ts[0]);
                tv[1] = convert_timespec_to_timeval(ts[1]);
                result = utimes(path, tv);
        }
#elif defined(HAVE_UTIME)
        {
                struct utimbuf times;
                times.actime = convert_timespec_to_time_t(ts[0]);
                times.modtime = convert_timespec_to_time_t(ts[1]);
                result = utime(path, times);
        }
#else
        errno = ENOSYS;
        result = -1;
#endif
        END_PROFILE(syscall_ntimes);
        return result;
}

/*********************************************************************
 A version of ftruncate that will write the space on disk if strict
 allocate is set.
**********************************************************************/

static int strict_allocate_ftruncate(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_OFF_T len)
{
        SMB_STRUCT_STAT st;
        SMB_OFF_T currpos = SMB_VFS_LSEEK(fsp, fd, 0, SEEK_CUR);
        unsigned char zero_space[4096];
        SMB_OFF_T space_to_write;

        if (currpos == -1)
                return -1;

        if (SMB_VFS_FSTAT(fsp, fd, &st) == -1)
                return -1;

        space_to_write = len - st.st_size;

#ifdef S_ISFIFO
        if (S_ISFIFO(st.st_mode))
                return 0;
#endif

        if (st.st_size == len)
                return 0;

        /* Shrink - just ftruncate. */
        if (st.st_size > len)
                return sys_ftruncate(fd, len);

        /* Write out the real space on disk. */
        if (SMB_VFS_LSEEK(fsp, fd, st.st_size, SEEK_SET) != st.st_size)
                return -1;

        space_to_write = len - st.st_size;

        memset(zero_space, '\0', sizeof(zero_space));
        while ( space_to_write > 0) {
                SMB_OFF_T retlen;
                SMB_OFF_T current_len_to_write = MIN(sizeof(zero_space),space_to_write);

                retlen = SMB_VFS_WRITE(fsp,fsp->fh->fd,(char *)zero_space,current_len_to_write);
                if (retlen <= 0)
                        return -1;

                space_to_write -= retlen;
        }

        /* Seek to where we were */
        if (SMB_VFS_LSEEK(fsp, fd, currpos, SEEK_SET) != currpos)
                return -1;

        return 0;
}

static int vfswrap_ftruncate(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_OFF_T len)
{
        int result = -1;
        SMB_STRUCT_STAT st;
        char c = 0;
        SMB_OFF_T currpos;

        START_PROFILE(syscall_ftruncate);

        if (lp_strict_allocate(SNUM(fsp->conn))) {
                result = strict_allocate_ftruncate(handle, fsp, fd, len);
                END_PROFILE(syscall_ftruncate);
                return result;
        }

        /* we used to just check HAVE_FTRUNCATE_EXTEND and only use
           sys_ftruncate if the system supports it. Then I discovered that
           you can have some filesystems that support ftruncate
           expansion and some that don't! On Linux fat can't do
           ftruncate extend but ext2 can. */

        result = sys_ftruncate(fd, len);
        if (result == 0)
                goto done;

        /* According to W. R. Stevens advanced UNIX prog. Pure 4.3 BSD cannot
           extend a file with ftruncate. Provide alternate implementation
           for this */
        currpos = SMB_VFS_LSEEK(fsp, fd, 0, SEEK_CUR);
        if (currpos == -1) {
                goto done;
        }

        /* Do an fstat to see if the file is longer than the requested
           size in which case the ftruncate above should have
           succeeded or shorter, in which case seek to len - 1 and
           write 1 byte of zero */
        if (SMB_VFS_FSTAT(fsp, fd, &st) == -1) {
                goto done;
        }

#ifdef S_ISFIFO
        if (S_ISFIFO(st.st_mode)) {
                result = 0;
                goto done;
        }
#endif

        if (st.st_size == len) {
                result = 0;
                goto done;
        }

        if (st.st_size > len) {
                /* the sys_ftruncate should have worked */
                goto done;
        }

        if (SMB_VFS_LSEEK(fsp, fd, len-1, SEEK_SET) != len -1)
                goto done;

        if (SMB_VFS_WRITE(fsp, fd, &c, 1)!=1)
                goto done;

        /* Seek to where we were */
        if (SMB_VFS_LSEEK(fsp, fd, currpos, SEEK_SET) != currpos)
                goto done;
        result = 0;

  done:

        END_PROFILE(syscall_ftruncate);
        return result;
}

static BOOL vfswrap_lock(vfs_handle_struct *handle, files_struct *fsp, int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
{
        BOOL result;

        START_PROFILE(syscall_fcntl_lock);
        result =  fcntl_lock(fd, op, offset, count, type);
        END_PROFILE(syscall_fcntl_lock);
        return result;
}

static int vfswrap_kernel_flock(vfs_handle_struct *handle, files_struct *fsp, int fd,
                                uint32 share_mode)
{
        START_PROFILE(syscall_kernel_flock);
        kernel_flock(fd, share_mode);
        END_PROFILE(syscall_kernel_flock);
        return 0;
}

static BOOL vfswrap_getlock(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
{
        BOOL result;

        START_PROFILE(syscall_fcntl_getlock);
        result =  fcntl_getlock(fd, poffset, pcount, ptype, ppid);
        END_PROFILE(syscall_fcntl_getlock);
        return result;
}

static int vfswrap_linux_setlease(vfs_handle_struct *handle, files_struct *fsp, int fd,
                                int leasetype)
{
        int result = -1;

        START_PROFILE(syscall_linux_setlease);

#ifdef LINUX
        /* first set the signal handler */
        if(linux_set_lease_sighandler(fd) == -1)
                return -1;

        result = linux_setlease(fd, leasetype);
#else
        errno = ENOSYS;
#endif
        END_PROFILE(syscall_linux_setlease);
        return result;
}

static int vfswrap_symlink(vfs_handle_struct *handle,  const char *oldpath, const char *newpath)
{
        int result;

        START_PROFILE(syscall_symlink);
        result = sys_symlink(oldpath, newpath);
        END_PROFILE(syscall_symlink);
        return result;
}

static int vfswrap_readlink(vfs_handle_struct *handle,  const char *path, char *buf, size_t bufsiz)
{
        int result;

        START_PROFILE(syscall_readlink);
        result = sys_readlink(path, buf, bufsiz);
        END_PROFILE(syscall_readlink);
        return result;
}

static int vfswrap_link(vfs_handle_struct *handle,  const char *oldpath, const char *newpath)
{
        int result;

        START_PROFILE(syscall_link);
        result = sys_link(oldpath, newpath);
        END_PROFILE(syscall_link);
        return result;
}

static int vfswrap_mknod(vfs_handle_struct *handle,  const char *pathname, mode_t mode, SMB_DEV_T dev)
{
        int result;

        START_PROFILE(syscall_mknod);
        result = sys_mknod(pathname, mode, dev);
        END_PROFILE(syscall_mknod);
        return result;
}

static char *vfswrap_realpath(vfs_handle_struct *handle,  const char *path, char *resolved_path)
{
        char *result;

        START_PROFILE(syscall_realpath);
        result = sys_realpath(path, resolved_path);
        END_PROFILE(syscall_realpath);
        return result;
}

static NTSTATUS vfswrap_notify_watch(vfs_handle_struct *vfs_handle,
                                     struct sys_notify_context *ctx,
                                     struct notify_entry *e,
                                     void (*callback)(struct sys_notify_context *ctx, 
                                                      void *private_data,
                                                      struct notify_event *ev),
                                     void *private_data, void *handle)
{
        /*
         * So far inotify is the only supported default notify mechanism. If
         * another platform like the the BSD's or a proprietary Unix comes
         * along and wants another default, we can play the same trick we
         * played with Posix ACLs.
         *
         * Until that is the case, hard-code inotify here.
         */
#ifdef HAVE_INOTIFY
        if (lp_kernel_change_notify(ctx->conn->params)) {
                return inotify_watch(ctx, e, callback, private_data, handle);
        }
#endif
        /*
         * Do nothing, leave everything to notify_internal.c
         */
        return NT_STATUS_OK;
}

static int vfswrap_chflags(vfs_handle_struct *handle, const char *path, int flags)
{
#ifdef HAVE_CHFLAGS
        return chflags(path, flags);
#else
        errno = ENOSYS;
        return -1;
#endif
}

static size_t vfswrap_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, uint32 security_info, SEC_DESC **ppdesc)
{
        size_t result;

        START_PROFILE(fget_nt_acl);
        result = get_nt_acl(fsp, security_info, ppdesc);
        END_PROFILE(fget_nt_acl);
        return result;
}

static size_t vfswrap_get_nt_acl(vfs_handle_struct *handle, files_struct *fsp, const char *name, uint32 security_info, SEC_DESC **ppdesc)
{
        size_t result;

        START_PROFILE(get_nt_acl);
        result = get_nt_acl(fsp, security_info, ppdesc);
        END_PROFILE(get_nt_acl);
        return result;
}

static BOOL vfswrap_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, uint32 security_info_sent, SEC_DESC *psd)
{
        BOOL result;

        START_PROFILE(fset_nt_acl);
        result = set_nt_acl(fsp, security_info_sent, psd);
        END_PROFILE(fset_nt_acl);
        return result;
}

static BOOL vfswrap_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp, const char *name, uint32 security_info_sent, SEC_DESC *psd)
{
        BOOL result;

        START_PROFILE(set_nt_acl);
        result = set_nt_acl(fsp, security_info_sent, psd);
        END_PROFILE(set_nt_acl);
        return result;
}

static int vfswrap_chmod_acl(vfs_handle_struct *handle,  const char *name, mode_t mode)
{
#ifdef HAVE_NO_ACL
        errno = ENOSYS;
        return -1;
#else
        int result;

        START_PROFILE(chmod_acl);
        result = chmod_acl(handle->conn, name, mode);
        END_PROFILE(chmod_acl);
        return result;
#endif
}

static int vfswrap_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
{
#ifdef HAVE_NO_ACL
        errno = ENOSYS;
        return -1;
#else
        int result;

        START_PROFILE(fchmod_acl);
        result = fchmod_acl(fsp, fd, mode);
        END_PROFILE(fchmod_acl);
        return result;
#endif
}

static int vfswrap_sys_acl_get_entry(vfs_handle_struct *handle,  SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
        return sys_acl_get_entry(theacl, entry_id, entry_p);
}

static int vfswrap_sys_acl_get_tag_type(vfs_handle_struct *handle,  SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
{
        return sys_acl_get_tag_type(entry_d, tag_type_p);
}

static int vfswrap_sys_acl_get_permset(vfs_handle_struct *handle,  SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
        return sys_acl_get_permset(entry_d, permset_p);
}

static void * vfswrap_sys_acl_get_qualifier(vfs_handle_struct *handle,  SMB_ACL_ENTRY_T entry_d)
{
        return sys_acl_get_qualifier(entry_d);
}

static SMB_ACL_T vfswrap_sys_acl_get_file(vfs_handle_struct *handle,  const char *path_p, SMB_ACL_TYPE_T type)
{
        return sys_acl_get_file(handle, path_p, type);
}

static SMB_ACL_T vfswrap_sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp, int fd)
{
        return sys_acl_get_fd(handle, fsp, fd);
}

static int vfswrap_sys_acl_clear_perms(vfs_handle_struct *handle,  SMB_ACL_PERMSET_T permset)
{
        return sys_acl_clear_perms(permset);
}

static int vfswrap_sys_acl_add_perm(vfs_handle_struct *handle,  SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
        return sys_acl_add_perm(permset, perm);
}

static char * vfswrap_sys_acl_to_text(vfs_handle_struct *handle,  SMB_ACL_T theacl, ssize_t *plen)
{
        return sys_acl_to_text(theacl, plen);
}

static SMB_ACL_T vfswrap_sys_acl_init(vfs_handle_struct *handle,  int count)
{
        return sys_acl_init(count);
}

static int vfswrap_sys_acl_create_entry(vfs_handle_struct *handle,  SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry)
{
        return sys_acl_create_entry(pacl, pentry);
}

static int vfswrap_sys_acl_set_tag_type(vfs_handle_struct *handle,  SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype)
{
        return sys_acl_set_tag_type(entry, tagtype);
}

static int vfswrap_sys_acl_set_qualifier(vfs_handle_struct *handle,  SMB_ACL_ENTRY_T entry, void *qual)
{
        return sys_acl_set_qualifier(entry, qual);
}

static int vfswrap_sys_acl_set_permset(vfs_handle_struct *handle,  SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset)
{
        return sys_acl_set_permset(entry, permset);
}

static int vfswrap_sys_acl_valid(vfs_handle_struct *handle,  SMB_ACL_T theacl )
{
        return sys_acl_valid(theacl );
}

static int vfswrap_sys_acl_set_file(vfs_handle_struct *handle,  const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
{
        return sys_acl_set_file(handle, name, acltype, theacl);
}

static int vfswrap_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_ACL_T theacl)
{
        return sys_acl_set_fd(handle, fsp, fd, theacl);
}

static int vfswrap_sys_acl_delete_def_file(vfs_handle_struct *handle,  const char *path)
{
        return sys_acl_delete_def_file(handle, path);
}

static int vfswrap_sys_acl_get_perm(vfs_handle_struct *handle,  SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
        return sys_acl_get_perm(permset, perm);
}

static int vfswrap_sys_acl_free_text(vfs_handle_struct *handle,  char *text)
{
        return sys_acl_free_text(text);
}

static int vfswrap_sys_acl_free_acl(vfs_handle_struct *handle,  SMB_ACL_T posix_acl)
{
        return sys_acl_free_acl(posix_acl);
}

static int vfswrap_sys_acl_free_qualifier(vfs_handle_struct *handle,  void *qualifier, SMB_ACL_TAG_T tagtype)
{
        return sys_acl_free_qualifier(qualifier, tagtype);
}

/****************************************************************
 Extended attribute operations.
*****************************************************************/

static ssize_t vfswrap_getxattr(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size)
{
        return sys_getxattr(path, name, value, size);
}

static ssize_t vfswrap_lgetxattr(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size)
{
        return sys_lgetxattr(path, name, value, size);
}

static ssize_t vfswrap_fgetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, void *value, size_t size)
{
        return sys_fgetxattr(fd, name, value, size);
}

static ssize_t vfswrap_listxattr(struct vfs_handle_struct *handle, const char *path, char *list, size_t size)
{
        return sys_listxattr(path, list, size);
}

ssize_t vfswrap_llistxattr(struct vfs_handle_struct *handle, const char *path, char *list, size_t size)
{
        return sys_llistxattr(path, list, size);
}

ssize_t vfswrap_flistxattr(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, char *list, size_t size)
{
        return sys_flistxattr(fd, list, size);
}

static int vfswrap_removexattr(struct vfs_handle_struct *handle, const char *path, const char *name)
{
        return sys_removexattr(path, name);
}

static int vfswrap_lremovexattr(struct vfs_handle_struct *handle, const char *path, const char *name)
{
        return sys_lremovexattr(path, name);
}

static int vfswrap_fremovexattr(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name)
{
        return sys_fremovexattr(fd, name);
}

static int vfswrap_setxattr(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
{
        return sys_setxattr(path, name, value, size, flags);
}

static int vfswrap_lsetxattr(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
{
        return sys_lsetxattr(path, name, value, size, flags);
}

static int vfswrap_fsetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, const void *value, size_t size, int flags)
{
        return sys_fsetxattr(fd, name, value, size, flags);
}

static int vfswrap_aio_read(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb)
{
        return sys_aio_read(aiocb);
}

static int vfswrap_aio_write(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb)
{
        return sys_aio_write(aiocb);
}

static ssize_t vfswrap_aio_return(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb)
{
        return sys_aio_return(aiocb);
}

static int vfswrap_aio_cancel(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_AIOCB *aiocb)
{
        return sys_aio_cancel(fd, aiocb);
}

static int vfswrap_aio_error(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb)
{
        return sys_aio_error(aiocb);
}

static int vfswrap_aio_fsync(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, SMB_STRUCT_AIOCB *aiocb)
{
        return sys_aio_fsync(op, aiocb);
}

static int vfswrap_aio_suspend(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_AIOCB * const aiocb[], int n, const struct timespec *timeout)
{
        return sys_aio_suspend(aiocb, n, timeout);
}

static vfs_op_tuple vfs_default_ops[] = {

        /* Disk operations */

        {SMB_VFS_OP(vfswrap_connect),   SMB_VFS_OP_CONNECT,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_disconnect),        SMB_VFS_OP_DISCONNECT,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_disk_free), SMB_VFS_OP_DISK_FREE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_get_quota), SMB_VFS_OP_GET_QUOTA,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_set_quota), SMB_VFS_OP_SET_QUOTA,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_get_shadow_copy_data), SMB_VFS_OP_GET_SHADOW_COPY_DATA,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_statvfs),   SMB_VFS_OP_STATVFS,
         SMB_VFS_LAYER_OPAQUE},

        /* Directory operations */

        {SMB_VFS_OP(vfswrap_opendir),   SMB_VFS_OP_OPENDIR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_readdir),   SMB_VFS_OP_READDIR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_seekdir),   SMB_VFS_OP_SEEKDIR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_telldir),   SMB_VFS_OP_TELLDIR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_rewinddir), SMB_VFS_OP_REWINDDIR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_mkdir),     SMB_VFS_OP_MKDIR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_rmdir),     SMB_VFS_OP_RMDIR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_closedir),  SMB_VFS_OP_CLOSEDIR,
         SMB_VFS_LAYER_OPAQUE},

        /* File operations */

        {SMB_VFS_OP(vfswrap_open),      SMB_VFS_OP_OPEN,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_close),     SMB_VFS_OP_CLOSE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_read),      SMB_VFS_OP_READ,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_pread),     SMB_VFS_OP_PREAD,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_write),     SMB_VFS_OP_WRITE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_pwrite),    SMB_VFS_OP_PWRITE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_lseek),     SMB_VFS_OP_LSEEK,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sendfile),  SMB_VFS_OP_SENDFILE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_rename),    SMB_VFS_OP_RENAME,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_fsync),     SMB_VFS_OP_FSYNC,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_stat),      SMB_VFS_OP_STAT,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_fstat),     SMB_VFS_OP_FSTAT,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_lstat),     SMB_VFS_OP_LSTAT,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_unlink),    SMB_VFS_OP_UNLINK,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_chmod),     SMB_VFS_OP_CHMOD,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_fchmod),    SMB_VFS_OP_FCHMOD,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_chown),     SMB_VFS_OP_CHOWN,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_fchown),    SMB_VFS_OP_FCHOWN,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_chdir),     SMB_VFS_OP_CHDIR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_getwd),     SMB_VFS_OP_GETWD,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_ntimes),    SMB_VFS_OP_NTIMES,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_ftruncate), SMB_VFS_OP_FTRUNCATE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_lock),      SMB_VFS_OP_LOCK,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_kernel_flock),      SMB_VFS_OP_KERNEL_FLOCK,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_linux_setlease),    SMB_VFS_OP_LINUX_SETLEASE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_getlock),   SMB_VFS_OP_GETLOCK,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_symlink),   SMB_VFS_OP_SYMLINK,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_readlink),  SMB_VFS_OP_READLINK,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_link),      SMB_VFS_OP_LINK,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_mknod),     SMB_VFS_OP_MKNOD,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_realpath),  SMB_VFS_OP_REALPATH,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_notify_watch),      SMB_VFS_OP_NOTIFY_WATCH,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_chflags),   SMB_VFS_OP_CHFLAGS,
         SMB_VFS_LAYER_OPAQUE},

        /* NT ACL operations. */

        {SMB_VFS_OP(vfswrap_fget_nt_acl),       SMB_VFS_OP_FGET_NT_ACL,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_get_nt_acl),        SMB_VFS_OP_GET_NT_ACL,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_fset_nt_acl),       SMB_VFS_OP_FSET_NT_ACL,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_set_nt_acl),        SMB_VFS_OP_SET_NT_ACL,
         SMB_VFS_LAYER_OPAQUE},

        /* POSIX ACL operations. */

        {SMB_VFS_OP(vfswrap_chmod_acl), SMB_VFS_OP_CHMOD_ACL,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_fchmod_acl),        SMB_VFS_OP_FCHMOD_ACL,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_get_entry), SMB_VFS_OP_SYS_ACL_GET_ENTRY,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_get_tag_type),      SMB_VFS_OP_SYS_ACL_GET_TAG_TYPE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_get_permset),       SMB_VFS_OP_SYS_ACL_GET_PERMSET,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_get_qualifier),     SMB_VFS_OP_SYS_ACL_GET_QUALIFIER,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_get_file),  SMB_VFS_OP_SYS_ACL_GET_FILE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_get_fd),    SMB_VFS_OP_SYS_ACL_GET_FD,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_clear_perms),       SMB_VFS_OP_SYS_ACL_CLEAR_PERMS,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_add_perm),  SMB_VFS_OP_SYS_ACL_ADD_PERM,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_to_text),   SMB_VFS_OP_SYS_ACL_TO_TEXT,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_init),      SMB_VFS_OP_SYS_ACL_INIT,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_create_entry),      SMB_VFS_OP_SYS_ACL_CREATE_ENTRY,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_set_tag_type),      SMB_VFS_OP_SYS_ACL_SET_TAG_TYPE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_set_qualifier),     SMB_VFS_OP_SYS_ACL_SET_QUALIFIER,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_set_permset),       SMB_VFS_OP_SYS_ACL_SET_PERMSET,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_valid),     SMB_VFS_OP_SYS_ACL_VALID,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_set_file),  SMB_VFS_OP_SYS_ACL_SET_FILE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_set_fd),    SMB_VFS_OP_SYS_ACL_SET_FD,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_delete_def_file),   SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_get_perm),  SMB_VFS_OP_SYS_ACL_GET_PERM,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_free_text), SMB_VFS_OP_SYS_ACL_FREE_TEXT,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_free_acl),  SMB_VFS_OP_SYS_ACL_FREE_ACL,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_sys_acl_free_qualifier),    SMB_VFS_OP_SYS_ACL_FREE_QUALIFIER,
         SMB_VFS_LAYER_OPAQUE},

        /* EA operations. */

        {SMB_VFS_OP(vfswrap_getxattr),  SMB_VFS_OP_GETXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_lgetxattr), SMB_VFS_OP_LGETXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_fgetxattr), SMB_VFS_OP_FGETXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_listxattr), SMB_VFS_OP_LISTXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_llistxattr),        SMB_VFS_OP_LLISTXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_flistxattr),        SMB_VFS_OP_FLISTXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_removexattr),       SMB_VFS_OP_REMOVEXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_lremovexattr),      SMB_VFS_OP_LREMOVEXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_fremovexattr),      SMB_VFS_OP_FREMOVEXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_setxattr),  SMB_VFS_OP_SETXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_lsetxattr), SMB_VFS_OP_LSETXATTR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_fsetxattr), SMB_VFS_OP_FSETXATTR,
         SMB_VFS_LAYER_OPAQUE},

        {SMB_VFS_OP(vfswrap_aio_read),  SMB_VFS_OP_AIO_READ,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_aio_write), SMB_VFS_OP_AIO_WRITE,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_aio_return),        SMB_VFS_OP_AIO_RETURN,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_aio_cancel), SMB_VFS_OP_AIO_CANCEL,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_aio_error), SMB_VFS_OP_AIO_ERROR,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_aio_fsync), SMB_VFS_OP_AIO_FSYNC,
         SMB_VFS_LAYER_OPAQUE},
        {SMB_VFS_OP(vfswrap_aio_suspend),SMB_VFS_OP_AIO_SUSPEND,
         SMB_VFS_LAYER_OPAQUE},

        /* Finish VFS operations definition */

        {SMB_VFS_OP(NULL),              SMB_VFS_OP_NOOP,
         SMB_VFS_LAYER_NOOP}
};

NTSTATUS vfs_default_init(void);
NTSTATUS vfs_default_init(void)
{
        unsigned int needed = SMB_VFS_OP_LAST + 1; /* convert from index to count */

        if (ARRAY_SIZE(vfs_default_ops) != needed) {
                DEBUG(0, ("%s: %u ops registered, but %u ops are required\n",
                        DEFAULT_VFS_MODULE_NAME, (unsigned int)ARRAY_SIZE(vfs_default_ops), needed));
                smb_panic("operation(s) missing from default VFS module");
        }

        return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
                                DEFAULT_VFS_MODULE_NAME, vfs_default_ops);
}

---