root / lab4 / .minix-src / include / ufs / mfs / mfsnode.h @ 13
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1 | 13 | up20180614 | /* $NetBSD: mfsnode.h,v 1.21 2008/03/26 14:19:43 ad Exp $ */
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2 | |||
3 | /*
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4 | * Copyright (c) 1989, 1993
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5 | * The Regents of the University of California. All rights reserved.
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6 | *
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7 | * Redistribution and use in source and binary forms, with or without
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8 | * modification, are permitted provided that the following conditions
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9 | * are met:
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10 | * 1. Redistributions of source code must retain the above copyright
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11 | * notice, this list of conditions and the following disclaimer.
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12 | * 2. Redistributions in binary form must reproduce the above copyright
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13 | * notice, this list of conditions and the following disclaimer in the
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14 | * documentation and/or other materials provided with the distribution.
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15 | * 3. Neither the name of the University nor the names of its contributors
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16 | * may be used to endorse or promote products derived from this software
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17 | * without specific prior written permission.
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18 | *
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19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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29 | * SUCH DAMAGE.
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30 | *
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31 | * @(#)mfsnode.h 8.3 (Berkeley) 5/19/95
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32 | */
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33 | |||
34 | #ifndef _UFS_MFS_MFSNODE_H_
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35 | #define _UFS_MFS_MFSNODE_H_
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36 | |||
37 | /*
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38 | * This structure defines the control data for the memory based file system.
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39 | */
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40 | |||
41 | struct mfsnode {
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42 | struct vnode *mfs_vnode; /* vnode associated with this mfsnode */ |
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43 | void *mfs_baseoff; /* base of file system in memory */ |
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44 | long mfs_size; /* size of memory file system */ |
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45 | struct proc *mfs_proc; /* supporting process */ |
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46 | int mfs_shutdown; /* shutdown this mfsnode */ |
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47 | #if defined(_KERNEL)
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48 | kcondvar_t mfs_cv; /* notifier */
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49 | int mfs_refcnt; /* number of references */ |
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50 | struct bufq_state *mfs_buflist;/* list of I/O requests */ |
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51 | #endif /* defined(_KERNEL) */ |
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52 | }; |
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53 | |||
54 | #if defined(_KERNEL)
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55 | /*
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56 | * Convert between mfsnode pointers and vnode pointers
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57 | */
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58 | #define VTOMFS(vp) ((struct mfsnode *)(vp)->v_data) |
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59 | #define MFSTOV(mfsp) ((mfsp)->mfs_vnode)
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60 | |||
61 | /* Prototypes for MFS operations on vnodes. */
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62 | #define mfs_lookup genfs_badop
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63 | #define mfs_create genfs_badop
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64 | #define mfs_mknod genfs_badop
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65 | #define mfs_access genfs_badop
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66 | #define mfs_getattr genfs_badop
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67 | #define mfs_setattr genfs_badop
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68 | #define mfs_read genfs_badop
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69 | #define mfs_write genfs_badop
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70 | #define mfs_poll genfs_badop
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71 | #define mfs_mmap genfs_badop
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72 | #define mfs_seek genfs_badop
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73 | #define mfs_remove genfs_badop
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74 | #define mfs_link genfs_badop
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75 | #define mfs_rename genfs_badop
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76 | #define mfs_mkdir genfs_badop
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77 | #define mfs_rmdir genfs_badop
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78 | #define mfs_symlink genfs_badop
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79 | #define mfs_readdir genfs_badop
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80 | #define mfs_readlink genfs_badop
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81 | #define mfs_abortop genfs_badop
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82 | #define mfs_islocked genfs_noislocked
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83 | #define mfs_pathconf genfs_badop
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84 | #define mfs_advlock genfs_badop
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85 | #define mfs_bwrite vn_bwrite
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86 | #define mfs_revoke genfs_revoke
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87 | #define mfs_putpages genfs_null_putpages
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88 | |||
89 | #endif /* defined(_KERNEL) */ |
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90 | |||
91 | #endif /* !_UFS_MFS_MFSNODE_H_ */ |