Annotation of prex-old/include/sys/mount.h, Revision 1.1.1.1.2.1
1.1 nbrk 1: /*-
2: * Copyright (c) 1989, 1991, 1993
3: * The Regents of the University of California. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the University nor the names of its contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: *
29: * @(#)mount.h 8.21 (Berkeley) 5/20/95
30: */
31:
32: #ifndef _SYS_MOUNT_H
33: #define _SYS_MOUNT_H
34:
35: #include <sys/cdefs.h>
36: #include <sys/list.h>
37: #include <sys/vnode.h>
38: #include <sys/syslimits.h>
39:
40: typedef struct { int32_t val[2]; } fsid_t; /* file system id type */
41:
42:
43: /*
44: * file system statistics
45: */
46: struct statfs {
47: short f_type; /* filesystem type number */
48: short f_flags; /* copy of mount flags */
49: long f_bsize; /* fundamental file system block size */
50: long f_blocks; /* total data blocks in file system */
51: long f_bfree; /* free blocks in fs */
52: long f_bavail; /* free blocks avail to non-superuser */
53: long f_files; /* total file nodes in file system */
54: long f_ffree; /* free file nodes in fs */
55: fsid_t f_fsid; /* file system id */
56: long f_namelen; /* maximum filename length */
57: };
58:
59: /*
60: * Mount data
61: */
62: struct mount {
63: struct list m_link; /* link to next mount point */
64: struct vfsops *m_op; /* pointer to vfs operation */
65: int m_flags; /* mount flag */
66: int m_count; /* reference count */
67: char m_path[PATH_MAX]; /* mounted path */
68: dev_t m_dev; /* mounted device */
69: struct vnode *m_root; /* root vnode */
70: struct vnode *m_covered; /* vnode covered on parent fs */
71: void *m_data; /* private data for fs */
72: };
73: typedef struct mount *mount_t;
74:
75:
76: /*
77: * Mount flags.
78: *
79: * Unmount uses MNT_FORCE flag.
80: */
81: #define MNT_RDONLY 0x00000001 /* read only filesystem */
82: #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
83: #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
84: #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
85: #define MNT_NODEV 0x00000010 /* don't interpret special files */
86: #define MNT_UNION 0x00000020 /* union with underlying filesystem */
87: #define MNT_ASYNC 0x00000040 /* file system written asynchronously */
88:
89: /*
90: * exported mount flags.
91: */
92: #define MNT_EXRDONLY 0x00000080 /* exported read only */
93: #define MNT_EXPORTED 0x00000100 /* file system is exported */
94: #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
95: #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
96: #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
97:
98: /*
99: * Flags set by internal operations.
100: */
101: #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
102: #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
103: #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
104:
105: /*
106: * Mask of flags that are visible to statfs()
107: */
108: #define MNT_VISFLAGMASK 0x0000ffff
109:
110: /*
111: * External filesystem control flags.
112: */
113: #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
114: #define MNT_DELEXPORT 0x00020000 /* delete export host lists */
115: #define MNT_RELOAD 0x00040000 /* reload filesystem data */
116: #define MNT_FORCE 0x00080000 /* force unmount or readonly change */
117: /*
118: * Internal filesystem control flags.
119: *
120: * MNT_UNMOUNT locks the mount entry so that name lookup cannot proceed
121: * past the mount point. This keeps the subtree stable during mounts
122: * and unmounts.
123: */
124: #define MNT_UNMOUNT 0x01000000 /* unmount in progress */
125: #define MNT_MWAIT 0x02000000 /* waiting for unmount to finish */
126: #define MNT_WANTRDWR 0x04000000 /* upgrade to read/write requested */
127:
128: /*
129: * Sysctl CTL_VFS definitions.
130: *
131: * Second level identifier specifies which filesystem. Second level
132: * identifier VFS_GENERIC returns information about all filesystems.
133: */
134: #define VFS_GENERIC 0 /* generic filesystem information */
135: /*
136: * Third level identifiers for VFS_GENERIC are given below; third
137: * level identifiers for specific filesystems are given in their
138: * mount specific header files.
139: */
140: #define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
141: #define VFS_CONF 2 /* struct: vfsconf for filesystem given
142: as next argument */
143:
144: /*
145: * Flags for various system call interfaces.
146: *
147: * waitfor flags to vfs_sync() and getfsstat()
148: */
149: #define MNT_WAIT 1
150: #define MNT_NOWAIT 2
151:
152:
153: /*
154: * Filesystem type switch table.
155: */
156: struct vfssw {
157: char *vs_name; /* name of file system */
158: int (*vs_init)(void); /* initialize routine */
159: struct vfsops *vs_op; /* pointer to vfs operation */
160: };
161:
162: /*
163: * Operations supported on virtual file system.
164: */
165: struct vfsops {
1.1.1.1.2.1! nbrk 166: int (*vfs_mount) (mount_t mp, char *dev, int flags, void *data);
! 167: int (*vfs_unmount) (mount_t mp);
! 168: int (*vfs_sync) (mount_t mp);
! 169: int (*vfs_vget) (mount_t mp, vnode_t vp);
! 170: int (*vfs_statfs) (mount_t mp, struct statfs *sfp);
! 171: struct vnops *vfs_vnops;
1.1 nbrk 172: };
173:
174: typedef int (*vfsop_mount_t)(mount_t, char *, int, void *);
175: typedef int (*vfsop_umount_t)(mount_t);
176: typedef int (*vfsop_sync_t)(mount_t);
177: typedef int (*vfsop_vget_t)(mount_t, vnode_t);
178: typedef int (*vfsop_statfs_t)(mount_t, struct statfs *);
179:
180: /*
181: * VFS interface
182: */
1.1.1.1.2.1! nbrk 183: #define VFS_MOUNT(MP, DEV, FL, DAT) ((MP)->m_op->vfs_mount)(MP, DEV, FL, DAT)
! 184: #define VFS_UNMOUNT(MP) ((MP)->m_op->vfs_unmount)(MP)
! 185: #define VFS_SYNC(MP) ((MP)->m_op->vfs_sync)(MP)
! 186: #define VFS_VGET(MP, VP) ((MP)->m_op->vfs_vget)(MP, VP)
! 187: #define VFS_STATFS(MP, SFP) ((MP)->m_op->vfs_statfs)(MP, SFP)
1.1 nbrk 188:
189: #define VFS_NULL ((void *)vfs_null)
190:
191: __BEGIN_DECLS
192: int mount(const char *, const char *, const char *, int, void *);
193: int umount(const char *);
194: int vfs_nullop(void);
195: int vfs_einval(void);
196: __END_DECLS
197:
198: #endif /* !_SYS_MOUNT_H */
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