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| Current File : //usr/src/sys/gnu/fs/xfs/xfs_clnt.h |
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* 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.
*
* This program is distributed in the hope that it would 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 the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_CLNT_H__
#define __XFS_CLNT_H__
/*
* XFS arguments structure, constructed from the arguments we
* are passed via the mount system call.
*
* NOTE: The mount system call is handled differently between
* Linux and IRIX. In IRIX we worked work with a binary data
* structure coming in across the syscall interface from user
* space (the mount userspace knows about each filesystem type
* and the set of valid options for it, and converts the users
* argument string into a binary structure _before_ making the
* system call), and the ABI issues that this implies.
*
* In Linux, we are passed a comma separated set of options;
* ie. a NULL terminated string of characters. Userspace mount
* code does not have any knowledge of mount options expected by
* each filesystem type and so each filesystem parses its mount
* options in kernel space.
*
* For the Linux port, we kept this structure pretty much intact
* and use it internally (because the existing code groks it).
*/
struct xfs_mount_args {
int flags; /* flags -> see XFSMNT_... macros below */
int flags2; /* flags -> see XFSMNT2_... macros below */
int logbufs; /* Number of log buffers, -1 to default */
int logbufsize; /* Size of log buffers, -1 to default */
char fsname[MAXNAMELEN+1]; /* data device name */
char rtname[MAXNAMELEN+1]; /* realtime device filename */
char logname[MAXNAMELEN+1]; /* journal device filename */
char mtpt[MAXNAMELEN+1]; /* filesystem mount point */
int sunit; /* stripe unit (BBs) */
int swidth; /* stripe width (BBs), multiple of sunit */
uchar_t iosizelog; /* log2 of the preferred I/O size */
int ihashsize; /* inode hash table size (buckets) */
};
/*
* XFS mount option flags -- args->flags1
*/
#define XFSMNT_ATTR2 0x00000001 /* allow ATTR2 EA format */
#define XFSMNT_WSYNC 0x00000002 /* safe mode nfs mount
* compatible */
#define XFSMNT_INO64 0x00000004 /* move inode numbers up
* past 2^32 */
#define XFSMNT_UQUOTA 0x00000008 /* user quota accounting */
#define XFSMNT_PQUOTA 0x00000010 /* IRIX prj quota accounting */
#define XFSMNT_UQUOTAENF 0x00000020 /* user quota limit
* enforcement */
#define XFSMNT_PQUOTAENF 0x00000040 /* IRIX project quota limit
* enforcement */
#define XFSMNT_QUIET 0x00000080 /* don't report mount errors */
#define XFSMNT_NOALIGN 0x00000200 /* don't allocate at
* stripe boundaries*/
#define XFSMNT_RETERR 0x00000400 /* return error to user */
#define XFSMNT_NORECOVERY 0x00000800 /* no recovery, implies
* read-only mount */
#define XFSMNT_SHARED 0x00001000 /* shared XFS mount */
#define XFSMNT_IOSIZE 0x00002000 /* optimize for I/O size */
#define XFSMNT_OSYNCISOSYNC 0x00004000 /* o_sync is REALLY o_sync */
/* (osyncisdsync is default) */
#define XFSMNT_32BITINODES 0x00200000 /* restrict inodes to 32
* bits of address space */
#define XFSMNT_GQUOTA 0x00400000 /* group quota accounting */
#define XFSMNT_GQUOTAENF 0x00800000 /* group quota limit
* enforcement */
#define XFSMNT_NOUUID 0x01000000 /* Ignore fs uuid */
#define XFSMNT_DMAPI 0x02000000 /* enable dmapi/xdsm */
#define XFSMNT_BARRIER 0x04000000 /* use write barriers */
#define XFSMNT_IDELETE 0x08000000 /* inode cluster delete */
#define XFSMNT_SWALLOC 0x10000000 /* turn on stripe width
* allocation */
#define XFSMNT_IHASHSIZE 0x20000000 /* inode hash table size */
#define XFSMNT_DIRSYNC 0x40000000 /* sync creat,link,unlink,rename
* symlink,mkdir,rmdir,mknod */
#define XFSMNT_FLAGS2 0x80000000 /* more flags set in flags2 */
/*
* XFS mount option flags -- args->flags2
*/
#define XFSMNT2_COMPAT_IOSIZE 0x00000001 /* don't report large preferred
* I/O size in stat(2) */
#endif /* __XFS_CLNT_H__ */