fs/xfs/xfs_clnt.h

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_CLNT_H__
  19 #define __XFS_CLNT_H__
  20
  21 /*
  22  * XFS arguments structure, constructed from the arguments we
  23  * are passed via the mount system call.
  24  *
  25  * NOTE: The mount system call is handled differently between
  26  * Linux and IRIX.  In IRIX we worked work with a binary data
  27  * structure coming in across the syscall interface from user
  28  * space (the mount userspace knows about each filesystem type
  29  * and the set of valid options for it, and converts the users
  30  * argument string into a binary structure _before_ making the
  31  * system call), and the ABI issues that this implies.
  32  *
  33  * In Linux, we are passed a comma separated set of options;
  34  * ie. a NULL terminated string of characters.  Userspace mount
  35  * code does not have any knowledge of mount options expected by
  36  * each filesystem type and so each filesystem parses its mount
  37  * options in kernel space.
  38  *
  39  * For the Linux port, we kept this structure pretty much intact
  40  * and use it internally (because the existing code groks it).
  41  */
  42 struct xfs_mount_args {
  43         int     flags;          /* flags -> see XFSMNT_... macros below */
  44         int     logbufs;        /* Number of log buffers, -1 to default */
  45         int     logbufsize;     /* Size of log buffers, -1 to default */
  46         char    fsname[MAXNAMELEN+1];   /* data device name */
  47         char    rtname[MAXNAMELEN+1];   /* realtime device filename */
  48         char    logname[MAXNAMELEN+1];  /* journal device filename */
  49         char    mtpt[MAXNAMELEN+1];     /* filesystem mount point */
  50         int     sunit;          /* stripe unit (BBs) */
  51         int     swidth;         /* stripe width (BBs), multiple of sunit */
  52         uchar_t iosizelog;      /* log2 of the preferred I/O size */
  53         int     ihashsize;      /* inode hash table size (buckets) */
  54 };
  55
  56 /*
  57  * XFS mount option flags
  58  */
  59 #define XFSMNT_COMPAT_ATTR      0x00000001      /* do not use ATTR2 format */
  60 #define XFSMNT_WSYNC            0x00000002      /* safe mode nfs mount
  61                                                  * compatible */
  62 #define XFSMNT_INO64            0x00000004      /* move inode numbers up
  63                                                  * past 2^32 */
  64 #define XFSMNT_UQUOTA           0x00000008      /* user quota accounting */
  65 #define XFSMNT_PQUOTA           0x00000010      /* IRIX prj quota accounting */
  66 #define XFSMNT_UQUOTAENF        0x00000020      /* user quota limit
  67                                                  * enforcement */
  68 #define XFSMNT_PQUOTAENF        0x00000040      /* IRIX project quota limit
  69                                                  * enforcement */
  70 #define XFSMNT_NOATIME          0x00000100      /* don't modify access
  71                                                  * times on reads */
  72 #define XFSMNT_NOALIGN          0x00000200      /* don't allocate at
  73                                                  * stripe boundaries*/
  74 #define XFSMNT_RETERR           0x00000400      /* return error to user */
  75 #define XFSMNT_NORECOVERY       0x00000800      /* no recovery, implies
  76                                                  * read-only mount */
  77 #define XFSMNT_SHARED           0x00001000      /* shared XFS mount */
  78 #define XFSMNT_IOSIZE           0x00002000      /* optimize for I/O size */
  79 #define XFSMNT_OSYNCISOSYNC     0x00004000      /* o_sync is REALLY o_sync */
  80                                                 /* (osyncisdsync is now default) */
  81 #define XFSMNT_32BITINODES      0x00200000      /* restrict inodes to 32
  82                                                  * bits of address space */
  83 #define XFSMNT_GQUOTA           0x00400000      /* group quota accounting */
  84 #define XFSMNT_GQUOTAENF        0x00800000      /* group quota limit
  85                                                  * enforcement */
  86 #define XFSMNT_NOUUID           0x01000000      /* Ignore fs uuid */
  87 #define XFSMNT_DMAPI            0x02000000      /* enable dmapi/xdsm */
  88 #define XFSMNT_BARRIER          0x04000000      /* use write barriers */
  89 #define XFSMNT_IDELETE          0x08000000      /* inode cluster delete */
  90 #define XFSMNT_SWALLOC          0x10000000      /* turn on stripe width
  91                                                  * allocation */
  92 #define XFSMNT_IHASHSIZE        0x20000000      /* inode hash table size */
  93 #define XFSMNT_DIRSYNC          0x40000000      /* sync creat,link,unlink,rename
  94                                                  * symlink,mkdir,rmdir,mknod */
  95 #define XFSMNT_COMPAT_IOSIZE    0x80000000      /* don't report large preferred
  96                                                  * I/O size in stat() */
  97
  98 #endif  /* __XFS_CLNT_H__ */