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331b6cc0ea
Improve support for writing to XFS partitions. Work done by: Russell Cattelan <cattelan at xfs dot org>
104 lines
4.4 KiB
C
104 lines
4.4 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_CLNT_H__
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#define __XFS_CLNT_H__
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/*
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* XFS arguments structure, constructed from the arguments we
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* are passed via the mount system call.
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*
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* NOTE: The mount system call is handled differently between
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* Linux and IRIX. In IRIX we worked work with a binary data
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* structure coming in across the syscall interface from user
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* space (the mount userspace knows about each filesystem type
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* and the set of valid options for it, and converts the users
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* argument string into a binary structure _before_ making the
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* system call), and the ABI issues that this implies.
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*
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* In Linux, we are passed a comma separated set of options;
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* ie. a NULL terminated string of characters. Userspace mount
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* code does not have any knowledge of mount options expected by
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* each filesystem type and so each filesystem parses its mount
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* options in kernel space.
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*
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* For the Linux port, we kept this structure pretty much intact
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* and use it internally (because the existing code groks it).
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*/
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struct xfs_mount_args {
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int flags; /* flags -> see XFSMNT_... macros below */
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int flags2; /* flags -> see XFSMNT2_... macros below */
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int logbufs; /* Number of log buffers, -1 to default */
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int logbufsize; /* Size of log buffers, -1 to default */
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char fsname[MAXNAMELEN+1]; /* data device name */
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char rtname[MAXNAMELEN+1]; /* realtime device filename */
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char logname[MAXNAMELEN+1]; /* journal device filename */
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char mtpt[MAXNAMELEN+1]; /* filesystem mount point */
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int sunit; /* stripe unit (BBs) */
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int swidth; /* stripe width (BBs), multiple of sunit */
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uchar_t iosizelog; /* log2 of the preferred I/O size */
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int ihashsize; /* inode hash table size (buckets) */
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};
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/*
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* XFS mount option flags -- args->flags1
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*/
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#define XFSMNT_ATTR2 0x00000001 /* allow ATTR2 EA format */
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#define XFSMNT_WSYNC 0x00000002 /* safe mode nfs mount
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* compatible */
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#define XFSMNT_INO64 0x00000004 /* move inode numbers up
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* past 2^32 */
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#define XFSMNT_UQUOTA 0x00000008 /* user quota accounting */
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#define XFSMNT_PQUOTA 0x00000010 /* IRIX prj quota accounting */
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#define XFSMNT_UQUOTAENF 0x00000020 /* user quota limit
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* enforcement */
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#define XFSMNT_PQUOTAENF 0x00000040 /* IRIX project quota limit
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* enforcement */
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#define XFSMNT_QUIET 0x00000080 /* don't report mount errors */
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#define XFSMNT_NOALIGN 0x00000200 /* don't allocate at
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* stripe boundaries*/
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#define XFSMNT_RETERR 0x00000400 /* return error to user */
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#define XFSMNT_NORECOVERY 0x00000800 /* no recovery, implies
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* read-only mount */
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#define XFSMNT_SHARED 0x00001000 /* shared XFS mount */
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#define XFSMNT_IOSIZE 0x00002000 /* optimize for I/O size */
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#define XFSMNT_OSYNCISOSYNC 0x00004000 /* o_sync is REALLY o_sync */
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/* (osyncisdsync is default) */
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#define XFSMNT_32BITINODES 0x00200000 /* restrict inodes to 32
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* bits of address space */
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#define XFSMNT_GQUOTA 0x00400000 /* group quota accounting */
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#define XFSMNT_GQUOTAENF 0x00800000 /* group quota limit
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* enforcement */
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#define XFSMNT_NOUUID 0x01000000 /* Ignore fs uuid */
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#define XFSMNT_DMAPI 0x02000000 /* enable dmapi/xdsm */
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#define XFSMNT_BARRIER 0x04000000 /* use write barriers */
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#define XFSMNT_IDELETE 0x08000000 /* inode cluster delete */
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#define XFSMNT_SWALLOC 0x10000000 /* turn on stripe width
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* allocation */
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#define XFSMNT_IHASHSIZE 0x20000000 /* inode hash table size */
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#define XFSMNT_DIRSYNC 0x40000000 /* sync creat,link,unlink,rename
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* symlink,mkdir,rmdir,mknod */
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#define XFSMNT_FLAGS2 0x80000000 /* more flags set in flags2 */
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/*
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* XFS mount option flags -- args->flags2
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*/
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#define XFSMNT2_COMPAT_IOSIZE 0x00000001 /* don't report large preferred
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* I/O size in stat(2) */
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#endif /* __XFS_CLNT_H__ */
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