FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/lib/libspl/include/os/linux/sys/param.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License, Version 1.0 only
      * (the "License").  You may not use this file except in compliance
      * with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     * or https://opensource.org/licenses/CDDL-1.0.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    /*
     * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
     * Use is subject to license terms.
     */
    
    #ifndef _LIBSPL_SYS_PARAM_H
    #define _LIBSPL_SYS_PARAM_H
    
    #include_next <sys/param.h>
    #include <unistd.h>
    
    /*
     * File system parameters and macros.
     *
     * The file system is made out of blocks of at most MAXBSIZE units,
     * with smaller units (fragments) only in the last direct block.
     * MAXBSIZE primarily determines the size of buffers in the buffer
     * pool. It may be made larger without any effect on existing
     * file systems; however making it smaller may make some file
     * systems unmountable.
     *
     * Note that the blocked devices are assumed to have DEV_BSIZE
     * "sectors" and that fragments must be some multiple of this size.
     */
    #define MAXBSIZE        8192
    #define DEV_BSIZE       512
    #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
    
    #define MAXNAMELEN      256
    #define MAXOFFSET_T     LLONG_MAX
    
    #define UID_NOBODY      60001           /* user ID no body */
    #define GID_NOBODY      UID_NOBODY
    #define UID_NOACCESS    60002           /* user ID no access */
    
    #define MAXUID          UINT32_MAX      /* max user id */
    #define MAXPROJID       MAXUID          /* max project id */
    
    #ifdef  PAGESIZE
    #undef  PAGESIZE
    #endif /* PAGESIZE */
    
    extern size_t spl_pagesize(void);
    #define PAGESIZE        (spl_pagesize())
    
    #endif

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