fs/xfs/xfs_clnt.h

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32 #ifndef __XFS_CLNT_H__
  33 #define __XFS_CLNT_H__
  34
  35 /*
  36  * XFS arguments structure, constructed from the arguments we
  37  * are passed via the mount system call.
  38  *
  39  * NOTE: The mount system call is handled differently between
  40  * Linux and IRIX.  In IRIX we worked work with a binary data
  41  * structure coming in across the syscall interface from user
  42  * space (the mount userspace knows about each filesystem type
  43  * and the set of valid options for it, and converts the users
  44  * argument string into a binary structure _before_ making the
  45  * system call), and the ABI issues that this implies.
  46  *
  47  * In Linux, we are passed a comma separated set of options;
  48  * ie. a NULL terminated string of characters.  Userspace mount
  49  * code does not have any knowledge of mount options expected by
  50  * each filesystem type and so each filesystem parses its mount
  51  * options in kernel space.
  52  *
  53  * For the Linux port, we kept this structure pretty much intact
  54  * and use it internally (because the existing code groks it).
  55  */
  56 struct xfs_mount_args {
  57         int     flags;          /* flags -> see XFSMNT_... macros below */
  58         int     logbufs;        /* Number of log buffers, -1 to default */
  59         int     logbufsize;     /* Size of log buffers, -1 to default */
  60         char    fsname[MAXNAMELEN+1];   /* data device name */
  61         char    rtname[MAXNAMELEN+1];   /* realtime device filename */
  62         char    logname[MAXNAMELEN+1];  /* journal device filename */
  63         char    mtpt[MAXNAMELEN+1];     /* filesystem mount point */
  64         int     sunit;          /* stripe unit (BBs) */
  65         int     swidth;         /* stripe width (BBs), multiple of sunit */
  66         uchar_t iosizelog;      /* log2 of the preferred I/O size */
  67         int     ihashsize;      /* inode hash table size (buckets) */
  68 };
  69
  70 /*
  71  * XFS mount option flags
  72  */
  73 #define XFSMNT_CHKLOG           0x00000001      /* check log */
  74 #define XFSMNT_WSYNC            0x00000002      /* safe mode nfs mount
  75                                                  * compatible */
  76 #define XFSMNT_INO64            0x00000004      /* move inode numbers up
  77                                                  * past 2^32 */
  78 #define XFSMNT_UQUOTA           0x00000008      /* user quota accounting */
  79 #define XFSMNT_PQUOTA           0x00000010      /* IRIX prj quota accounting */
  80 #define XFSMNT_UQUOTAENF        0x00000020      /* user quota limit
  81                                                  * enforcement */
  82 #define XFSMNT_PQUOTAENF        0x00000040      /* IRIX project quota limit
  83                                                  * enforcement */
  84 #define XFSMNT_NOATIME          0x00000100      /* don't modify access
  85                                                  * times on reads */
  86 #define XFSMNT_NOALIGN          0x00000200      /* don't allocate at
  87                                                  * stripe boundaries*/
  88 #define XFSMNT_RETERR           0x00000400      /* return error to user */
  89 #define XFSMNT_NORECOVERY       0x00000800      /* no recovery, implies
  90                                                  * read-only mount */
  91 #define XFSMNT_SHARED           0x00001000      /* shared XFS mount */
  92 #define XFSMNT_IOSIZE           0x00002000      /* optimize for I/O size */
  93 #define XFSMNT_OSYNCISOSYNC     0x00004000      /* o_sync is REALLY o_sync */
  94                                                 /* (osyncisdsync is now default) */
  95 #define XFSMNT_32BITINODES      0x00200000      /* restrict inodes to 32
  96                                                  * bits of address space */
  97 #define XFSMNT_GQUOTA           0x00400000      /* group quota accounting */
  98 #define XFSMNT_GQUOTAENF        0x00800000      /* group quota limit
  99                                                  * enforcement */
 100 #define XFSMNT_NOUUID           0x01000000      /* Ignore fs uuid */
 101 #define XFSMNT_DMAPI            0x02000000      /* enable dmapi/xdsm */
 102 #define XFSMNT_NOLOGFLUSH       0x04000000      /* Don't flush for log blocks */
 103 #define XFSMNT_IDELETE          0x08000000      /* inode cluster delete */
 104 #define XFSMNT_SWALLOC          0x10000000      /* turn on stripe width
 105                                                  * allocation */
 106 #define XFSMNT_IHASHSIZE        0x20000000      /* inode hash table size */
 107 #define XFSMNT_DIRSYNC          0x40000000      /* sync creat,link,unlink,rename
 108                                                  * symlink,mkdir,rmdir,mknod */
 109
 110 #endif  /* __XFS_CLNT_H__ */