scoutos / prex-0.9.0 / include / sys / mount.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 1989, 1991, 1993
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3 | * The Regents of the University of California. All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the University nor the names of its contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | *
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29 | * @(#)mount.h 8.21 (Berkeley) 5/20/95
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30 | */
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31 | |||
32 | #ifndef _SYS_MOUNT_H_
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33 | #define _SYS_MOUNT_H_
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34 | |||
35 | #include <sys/cdefs.h> |
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36 | #include <sys/list.h> |
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37 | #include <sys/vnode.h> |
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38 | #include <sys/syslimits.h> |
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39 | |||
40 | typedef struct { int32_t val[2]; } fsid_t; /* file system id type */ |
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41 | |||
42 | |||
43 | /*
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44 | * file system statistics
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45 | */
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46 | struct statfs {
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47 | short f_type; /* filesystem type number */ |
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48 | short f_flags; /* copy of mount flags */ |
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49 | long f_bsize; /* fundamental file system block size */ |
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50 | long f_blocks; /* total data blocks in file system */ |
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51 | long f_bfree; /* free blocks in fs */ |
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52 | long f_bavail; /* free blocks avail to non-superuser */ |
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53 | long f_files; /* total file nodes in file system */ |
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54 | long f_ffree; /* free file nodes in fs */ |
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55 | fsid_t f_fsid; /* file system id */
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56 | long f_namelen; /* maximum filename length */ |
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57 | }; |
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58 | |||
59 | /*
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60 | * Mount data
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61 | */
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62 | struct mount {
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63 | struct list m_link; /* link to next mount point */ |
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64 | struct vfsops *m_op; /* pointer to vfs operation */ |
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65 | int m_flags; /* mount flag */ |
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66 | int m_count; /* reference count */ |
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67 | char m_path[PATH_MAX]; /* mounted path */ |
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68 | dev_t m_dev; /* mounted device */
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69 | struct vnode *m_root; /* root vnode */ |
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70 | struct vnode *m_covered; /* vnode covered on parent fs */ |
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71 | void *m_data; /* private data for fs */ |
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72 | }; |
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73 | typedef struct mount *mount_t; |
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74 | |||
75 | |||
76 | /*
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77 | * Mount flags.
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78 | *
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79 | * Unmount uses MNT_FORCE flag.
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80 | */
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81 | #define MNT_RDONLY 0x00000001 /* read only filesystem */ |
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82 | #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ |
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83 | #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ |
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84 | #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ |
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85 | #define MNT_NODEV 0x00000010 /* don't interpret special files */ |
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86 | #define MNT_UNION 0x00000020 /* union with underlying filesystem */ |
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87 | #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ |
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88 | |||
89 | /*
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90 | * exported mount flags.
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91 | */
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92 | #define MNT_EXRDONLY 0x00000080 /* exported read only */ |
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93 | #define MNT_EXPORTED 0x00000100 /* file system is exported */ |
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94 | #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ |
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95 | #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ |
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96 | #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ |
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97 | |||
98 | /*
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99 | * Flags set by internal operations.
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100 | */
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101 | #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ |
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102 | #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ |
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103 | #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ |
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104 | |||
105 | /*
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106 | * Mask of flags that are visible to statfs()
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107 | */
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108 | #define MNT_VISFLAGMASK 0x0000ffff |
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109 | |||
110 | /*
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111 | * Filesystem type switch table.
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112 | */
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113 | struct vfssw {
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114 | char *vs_name; /* name of file system */ |
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115 | int (*vs_init)(void); /* initialize routine */ |
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116 | struct vfsops *vs_op; /* pointer to vfs operation */ |
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117 | }; |
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118 | |||
119 | /*
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120 | * Operations supported on virtual file system.
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121 | */
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122 | struct vfsops {
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123 | int (*vfs_mount) (mount_t, char *, int, void *); |
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124 | int (*vfs_unmount) (mount_t);
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125 | int (*vfs_sync) (mount_t);
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126 | int (*vfs_vget) (mount_t, vnode_t);
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127 | int (*vfs_statfs) (mount_t, struct statfs *); |
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128 | struct vnops *vfs_vnops;
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129 | }; |
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130 | |||
131 | typedef int (*vfsop_mount_t)(mount_t, char *, int, void *); |
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132 | typedef int (*vfsop_umount_t)(mount_t); |
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133 | typedef int (*vfsop_sync_t)(mount_t); |
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134 | typedef int (*vfsop_vget_t)(mount_t, vnode_t); |
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135 | typedef int (*vfsop_statfs_t)(mount_t, struct statfs *); |
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136 | |||
137 | /*
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138 | * VFS interface
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139 | */
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140 | #define VFS_MOUNT(MP, DEV, FL, DAT) ((MP)->m_op->vfs_mount)(MP, DEV, FL, DAT)
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141 | #define VFS_UNMOUNT(MP) ((MP)->m_op->vfs_unmount)(MP)
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142 | #define VFS_SYNC(MP) ((MP)->m_op->vfs_sync)(MP)
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143 | #define VFS_VGET(MP, VP) ((MP)->m_op->vfs_vget)(MP, VP)
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144 | #define VFS_STATFS(MP, SFP) ((MP)->m_op->vfs_statfs)(MP, SFP)
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145 | |||
146 | #define VFS_NULL ((void *)vfs_null) |
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147 | |||
148 | __BEGIN_DECLS |
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149 | int mount(const char *, const char *, const char *, int, void *); |
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150 | int umount(const char *); |
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151 | int vfs_nullop(void); |
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152 | int vfs_einval(void); |
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153 | __END_DECLS |
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154 | |||
155 | #endif /* !_SYS_MOUNT_H_ */ |