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 flags2; /* flags -> see XFSMNT2_... macros below */
45 int logbufs; /* Number of log buffers, -1 to default */
46 int logbufsize; /* Size of log buffers, -1 to default */
47 char fsname[MAXNAMELEN+1]; /* data device name */
48 char rtname[MAXNAMELEN+1]; /* realtime device filename */
49 char logname[MAXNAMELEN+1]; /* journal device filename */
50 char mtpt[MAXNAMELEN+1]; /* filesystem mount point */
51 int sunit; /* stripe unit (BBs) */
52 int swidth; /* stripe width (BBs), multiple of sunit */
53 uchar_t iosizelog; /* log2 of the preferred I/O size */
54 int ihashsize; /* inode hash table size (buckets) */
55 };
56
57 /*
58 * XFS mount option flags -- args->flags1
59 */
60 #define XFSMNT_ATTR2 0x00000001 /* allow ATTR2 EA format */
61 #define XFSMNT_WSYNC 0x00000002 /* safe mode nfs mount
62 * compatible */
63 #define XFSMNT_INO64 0x00000004 /* move inode numbers up
64 * past 2^32 */
65 #define XFSMNT_UQUOTA 0x00000008 /* user quota accounting */
66 #define XFSMNT_PQUOTA 0x00000010 /* IRIX prj quota accounting */
67 #define XFSMNT_UQUOTAENF 0x00000020 /* user quota limit
68 * enforcement */
69 #define XFSMNT_PQUOTAENF 0x00000040 /* IRIX project quota limit
70 * enforcement */
71 #define XFSMNT_QUIET 0x00000080 /* don't report mount errors */
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 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_IKEEP 0x08000000 /* inode cluster delete */
90 #define XFSMNT_SWALLOC 0x10000000 /* turn on stripe width
91 * allocation */
92 #define XFSMNT_DIRSYNC 0x40000000 /* sync creat,link,unlink,rename
93 * symlink,mkdir,rmdir,mknod */
94 #define XFSMNT_FLAGS2 0x80000000 /* more flags set in flags2 */
95
96 /*
97 * XFS mount option flags -- args->flags2
98 */
99 #define XFSMNT2_COMPAT_IOSIZE 0x00000001 /* don't report large preferred
100 * I/O size in stat(2) */
101 #define XFSMNT2_FILESTREAMS 0x00000002 /* enable the filestreams
102 * allocator */
103
104 #endif /* __XFS_CLNT_H__ */
105
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