root / prex-0.9.0 / include / sys / vnode.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 2005-2007, Kohsuke Ohtani
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3 | * 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 author nor the names of any co-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 AUTHOR 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 AUTHOR 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 | |||
30 | #ifndef _SYS_VNODE_H_
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31 | #define _SYS_VNODE_H_
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32 | |||
33 | #include <sys/types.h> |
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34 | #include <sys/stat.h> |
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35 | #include <sys/file.h> |
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36 | #include <sys/list.h> |
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37 | #include <sys/dirent.h> |
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38 | #include <sys/syslimits.h> |
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39 | |||
40 | struct vfsops;
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41 | struct vnops;
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42 | struct vnode;
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43 | struct file;
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44 | |||
45 | /*
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46 | * Vnode types.
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47 | */
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48 | enum {
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49 | VNON, /* no type */
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50 | VREG, /* regular file */
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51 | VDIR, /* directory */
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52 | VBLK, /* block device */
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53 | VCHR, /* character device */
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54 | VLNK, /* symbolic link */
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55 | VSOCK, /* socks */
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56 | VFIFO /* FIFO */
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57 | }; |
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58 | |||
59 | /*
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60 | * Reading or writing any of these items requires holding the
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61 | * appropriate lock.
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62 | */
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63 | struct vnode {
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64 | struct list v_link; /* link for hash list */ |
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65 | struct mount *v_mount; /* mounted vfs pointer */ |
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66 | struct vnops *v_op; /* vnode operations */ |
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67 | int v_refcnt; /* reference count */ |
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68 | int v_type; /* vnode type */ |
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69 | int v_flags; /* vnode flag */ |
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70 | mode_t v_mode; /* file mode */
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71 | size_t v_size; /* file size */
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72 | mutex_t v_lock; /* lock for this vnode */
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73 | int v_nrlocks; /* lock count (for debug) */ |
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74 | int v_blkno; /* block number */ |
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75 | char *v_path; /* pointer to path in fs */ |
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76 | void *v_data; /* private data for fs */ |
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77 | }; |
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78 | typedef struct vnode *vnode_t; |
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79 | |||
80 | /* flags for vnode */
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81 | #define VROOT 0x0001 /* root of its file system */ |
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82 | #define VISTTY 0x0002 /* device is tty */ |
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83 | #define VPROTDEV 0x0004 /* protected device */ |
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84 | |||
85 | /*
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86 | * Vnode attribute
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87 | */
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88 | struct vattr {
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89 | int va_type; /* vnode type */ |
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90 | mode_t va_mode; /* file access mode */
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91 | }; |
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92 | |||
93 | /*
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94 | * Modes.
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95 | */
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96 | #define VREAD 00004 /* read, write, execute permissions */ |
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97 | #define VWRITE 00002 |
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98 | #define VEXEC 00001 |
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99 | |||
100 | /*
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101 | * vnode operations
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102 | */
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103 | struct vnops {
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104 | int (*vop_open) (vnode_t, int); |
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105 | int (*vop_close) (vnode_t, file_t);
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106 | int (*vop_read) (vnode_t, file_t, void *, size_t, size_t *); |
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107 | int (*vop_write) (vnode_t, file_t, void *, size_t, size_t *); |
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108 | int (*vop_seek) (vnode_t, file_t, off_t, off_t);
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109 | int (*vop_ioctl) (vnode_t, file_t, u_long, void *); |
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110 | int (*vop_fsync) (vnode_t, file_t);
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111 | int (*vop_readdir) (vnode_t, file_t, struct dirent *); |
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112 | int (*vop_lookup) (vnode_t, char *, vnode_t); |
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113 | int (*vop_create) (vnode_t, char *, mode_t); |
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114 | int (*vop_remove) (vnode_t, vnode_t, char *); |
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115 | int (*vop_rename) (vnode_t, vnode_t, char *, vnode_t, vnode_t, char *); |
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116 | int (*vop_mkdir) (vnode_t, char *, mode_t); |
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117 | int (*vop_rmdir) (vnode_t, vnode_t, char *); |
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118 | int (*vop_getattr) (vnode_t, struct vattr *); |
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119 | int (*vop_setattr) (vnode_t, struct vattr *); |
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120 | int (*vop_inactive) (vnode_t);
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121 | int (*vop_truncate) (vnode_t, off_t);
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122 | }; |
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123 | |||
124 | typedef int (*vnop_open_t) (vnode_t, int); |
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125 | typedef int (*vnop_close_t) (vnode_t, file_t); |
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126 | typedef int (*vnop_read_t) (vnode_t, file_t, void *, size_t, size_t *); |
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127 | typedef int (*vnop_write_t) (vnode_t, file_t, void *, size_t, size_t *); |
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128 | typedef int (*vnop_seek_t) (vnode_t, file_t, off_t, off_t); |
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129 | typedef int (*vnop_ioctl_t) (vnode_t, file_t, u_long, void *); |
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130 | typedef int (*vnop_fsync_t) (vnode_t, file_t); |
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131 | typedef int (*vnop_readdir_t) (vnode_t, file_t, struct dirent *); |
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132 | typedef int (*vnop_lookup_t) (vnode_t, char *, vnode_t); |
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133 | typedef int (*vnop_create_t) (vnode_t, char *, mode_t); |
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134 | typedef int (*vnop_remove_t) (vnode_t, vnode_t, char *); |
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135 | typedef int (*vnop_rename_t) (vnode_t, vnode_t, char *, vnode_t, vnode_t, char *); |
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136 | typedef int (*vnop_mkdir_t) (vnode_t, char *, mode_t); |
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137 | typedef int (*vnop_rmdir_t) (vnode_t, vnode_t, char *); |
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138 | typedef int (*vnop_getattr_t) (vnode_t, struct vattr *); |
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139 | typedef int (*vnop_setattr_t) (vnode_t, struct vattr *); |
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140 | typedef int (*vnop_inactive_t) (vnode_t); |
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141 | typedef int (*vnop_truncate_t) (vnode_t, off_t); |
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142 | |||
143 | /*
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144 | * vnode interface
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145 | */
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146 | #define VOP_OPEN(VP, F) ((VP)->v_op->vop_open)(VP, F)
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147 | #define VOP_CLOSE(VP, FP) ((VP)->v_op->vop_close)(VP, FP)
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148 | #define VOP_READ(VP, FP, B, S, C) ((VP)->v_op->vop_read)(VP, FP, B, S, C)
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149 | #define VOP_WRITE(VP, FP, B, S, C) ((VP)->v_op->vop_write)(VP, FP, B, S, C)
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150 | #define VOP_SEEK(VP, FP, OLD, NEW) ((VP)->v_op->vop_seek)(VP, FP, OLD, NEW)
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151 | #define VOP_IOCTL(VP, FP, C, A) ((VP)->v_op->vop_ioctl)(VP, FP, C, A)
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152 | #define VOP_FSYNC(VP, FP) ((VP)->v_op->vop_fsync)(VP, FP)
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153 | #define VOP_READDIR(VP, FP, DIR) ((VP)->v_op->vop_readdir)(VP, FP, DIR)
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154 | #define VOP_LOOKUP(DVP, N, VP) ((DVP)->v_op->vop_lookup)(DVP, N, VP)
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155 | #define VOP_CREATE(DVP, N, M) ((DVP)->v_op->vop_create)(DVP, N, M)
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156 | #define VOP_REMOVE(DVP, VP, N) ((DVP)->v_op->vop_remove)(DVP, VP, N)
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157 | #define VOP_RENAME(DVP1, VP1, N1, DVP2, VP2, N2) \
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158 | ((DVP1)->v_op->vop_rename)(DVP1, VP1, N1, DVP2, VP2, N2) |
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159 | #define VOP_MKDIR(DVP, N, M) ((DVP)->v_op->vop_mkdir)(DVP, N, M)
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160 | #define VOP_RMDIR(DVP, VP, N) ((DVP)->v_op->vop_rmdir)(DVP, VP, N)
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161 | #define VOP_GETATTR(VP, VAP) ((VP)->v_op->vop_getattr)(VP, VAP)
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162 | #define VOP_SETATTR(VP, VAP) ((VP)->v_op->vop_setattr)(VP, VAP)
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163 | #define VOP_INACTIVE(VP) ((VP)->v_op->vop_inactive)(VP)
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164 | #define VOP_TRUNCATE(VP, N) ((VP)->v_op->vop_truncate)(VP, N)
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165 | |||
166 | __BEGIN_DECLS |
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167 | int vop_nullop(void); |
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168 | int vop_einval(void); |
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169 | vnode_t vn_lookup(struct mount *, char *); |
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170 | void vn_lock(vnode_t);
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171 | void vn_unlock(vnode_t);
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172 | int vn_stat(vnode_t, struct stat *); |
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173 | int vn_access(vnode_t, int); |
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174 | vnode_t vget(struct mount *, char *); |
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175 | void vput(vnode_t);
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176 | void vgone(vnode_t);
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177 | void vref(vnode_t);
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178 | void vrele(vnode_t);
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179 | int vcount(vnode_t);
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180 | void vflush(struct mount *); |
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181 | __END_DECLS |
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182 | |||
183 | #endif /* !_SYS_VNODE_H_ */ |