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root/include/sys/vnode.h/* [<][>][^][v][top][bottom][index][help] */INCLUDED FROM1 /* 2 * Copyright (c) 2005-2007, Kohsuke Ohtani 3 * 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 author nor the names of any co-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 AUTHOR 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 AUTHOR 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 30 #ifndef _SYS_VNODE_H_ 31 #define _SYS_VNODE_H_ 32 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 #include <sys/file.h> 36 #include <sys/list.h> 37 #include <sys/dirent.h> 38 #include <sys/syslimits.h> 39 40 struct vfsops; 41 struct vnops; 42 struct vnode; 43 struct file; 44 45 /* 46 * Vnode types. 47 */ 48 enum { 49 VNON, /* no type */ 50 VREG, /* regular file */ 51 VDIR, /* directory */ 52 VBLK, /* block device */ 53 VCHR, /* character device */ 54 VLNK, /* symbolic link */ 55 VSOCK, /* socks */ 56 VFIFO /* FIFO */ 57 }; 58 59 /* 60 * Reading or writing any of these items requires holding the 61 * appropriate lock. 62 */ 63 struct vnode { 64 struct list v_link; /* link for hash list */ 65 struct mount *v_mount; /* mounted vfs pointer */ 66 struct vnops *v_op; /* vnode operations */ 67 int v_refcnt; /* reference count */ 68 int v_type; /* vnode type */ 69 int v_flags; /* vnode flag */ 70 mode_t v_mode; /* file mode */ 71 size_t v_size; /* file size */ 72 mutex_t v_lock; /* lock for this vnode */ 73 int v_nrlocks; /* lock count (for debug) */ 74 int v_blkno; /* block number */ 75 char *v_path; /* pointer to path in fs */ 76 void *v_data; /* private data for fs */ 77 }; 78 typedef struct vnode *vnode_t; 79 80 /* flags for vnode */ 81 #define VROOT 0x0001 /* root of its file system */ 82 #define VISTTY 0x0002 /* device is tty */ 83 #define VPROTDEV 0x0004 /* protected device */ 84 85 /* 86 * Vnode attribute 87 */ 88 struct vattr { 89 int va_type; /* vnode type */ 90 mode_t va_mode; /* file access mode */ 91 }; 92 93 /* 94 * Modes. 95 */ 96 #define VREAD 00004 /* read, write, execute permissions */ 97 #define VWRITE 00002 98 #define VEXEC 00001 99 100 /* 101 * vnode operations 102 */ 103 struct vnops { 104 int (*vop_open) (vnode_t, int); 105 int (*vop_close) (vnode_t, file_t); 106 int (*vop_read) (vnode_t, file_t, void *, size_t, size_t *); 107 int (*vop_write) (vnode_t, file_t, void *, size_t, size_t *); 108 int (*vop_seek) (vnode_t, file_t, off_t, off_t); 109 int (*vop_ioctl) (vnode_t, file_t, u_long, void *); 110 int (*vop_fsync) (vnode_t, file_t); 111 int (*vop_readdir) (vnode_t, file_t, struct dirent *); 112 int (*vop_lookup) (vnode_t, char *, vnode_t); 113 int (*vop_create) (vnode_t, char *, mode_t); 114 int (*vop_remove) (vnode_t, vnode_t, char *); 115 int (*vop_rename) (vnode_t, vnode_t, char *, vnode_t, vnode_t, char *); 116 int (*vop_mkdir) (vnode_t, char *, mode_t); 117 int (*vop_rmdir) (vnode_t, vnode_t, char *); 118 int (*vop_getattr) (vnode_t, struct vattr *); 119 int (*vop_setattr) (vnode_t, struct vattr *); 120 int (*vop_inactive) (vnode_t); 121 int (*vop_truncate) (vnode_t, off_t); 122 }; 123 124 typedef int (*vnop_open_t) (vnode_t, int); 125 typedef int (*vnop_close_t) (vnode_t, file_t); 126 typedef int (*vnop_read_t) (vnode_t, file_t, void *, size_t, size_t *); 127 typedef int (*vnop_write_t) (vnode_t, file_t, void *, size_t, size_t *); 128 typedef int (*vnop_seek_t) (vnode_t, file_t, off_t, off_t); 129 typedef int (*vnop_ioctl_t) (vnode_t, file_t, u_long, void *); 130 typedef int (*vnop_fsync_t) (vnode_t, file_t); 131 typedef int (*vnop_readdir_t) (vnode_t, file_t, struct dirent *); 132 typedef int (*vnop_lookup_t) (vnode_t, char *, vnode_t); 133 typedef int (*vnop_create_t) (vnode_t, char *, mode_t); 134 typedef int (*vnop_remove_t) (vnode_t, vnode_t, char *); 135 typedef int (*vnop_rename_t) (vnode_t, vnode_t, char *, vnode_t, vnode_t, char *); 136 typedef int (*vnop_mkdir_t) (vnode_t, char *, mode_t); 137 typedef int (*vnop_rmdir_t) (vnode_t, vnode_t, char *); 138 typedef int (*vnop_getattr_t) (vnode_t, struct vattr *); 139 typedef int (*vnop_setattr_t) (vnode_t, struct vattr *); 140 typedef int (*vnop_inactive_t) (vnode_t); 141 typedef int (*vnop_truncate_t) (vnode_t, off_t); 142 143 /* 144 * vnode interface 145 */ 146 #define VOP_OPEN(VP, F) ((VP)->v_op->vop_open)(VP, F) 147 #define VOP_CLOSE(VP, FP) ((VP)->v_op->vop_close)(VP, FP) 148 #define VOP_READ(VP, FP, B, S, C) ((VP)->v_op->vop_read)(VP, FP, B, S, C) 149 #define VOP_WRITE(VP, FP, B, S, C) ((VP)->v_op->vop_write)(VP, FP, B, S, C) 150 #define VOP_SEEK(VP, FP, OLD, NEW) ((VP)->v_op->vop_seek)(VP, FP, OLD, NEW) 151 #define VOP_IOCTL(VP, FP, C, A) ((VP)->v_op->vop_ioctl)(VP, FP, C, A) 152 #define VOP_FSYNC(VP, FP) ((VP)->v_op->vop_fsync)(VP, FP) 153 #define VOP_READDIR(VP, FP, DIR) ((VP)->v_op->vop_readdir)(VP, FP, DIR) 154 #define VOP_LOOKUP(DVP, N, VP) ((DVP)->v_op->vop_lookup)(DVP, N, VP) 155 #define VOP_CREATE(DVP, N, M) ((DVP)->v_op->vop_create)(DVP, N, M) 156 #define VOP_REMOVE(DVP, VP, N) ((DVP)->v_op->vop_remove)(DVP, VP, N) 157 #define VOP_RENAME(DVP1, VP1, N1, DVP2, VP2, N2) \ 158 ((DVP1)->v_op->vop_rename)(DVP1, VP1, N1, DVP2, VP2, N2) 159 #define VOP_MKDIR(DVP, N, M) ((DVP)->v_op->vop_mkdir)(DVP, N, M) 160 #define VOP_RMDIR(DVP, VP, N) ((DVP)->v_op->vop_rmdir)(DVP, VP, N) 161 #define VOP_GETATTR(VP, VAP) ((VP)->v_op->vop_getattr)(VP, VAP) 162 #define VOP_SETATTR(VP, VAP) ((VP)->v_op->vop_setattr)(VP, VAP) 163 #define VOP_INACTIVE(VP) ((VP)->v_op->vop_inactive)(VP) 164 #define VOP_TRUNCATE(VP, N) ((VP)->v_op->vop_truncate)(VP, N) 165 166 __BEGIN_DECLS 167 int vop_nullop(void); 168 int vop_einval(void); 169 vnode_t vn_lookup(struct mount *, char *); 170 void vn_lock(vnode_t); 171 void vn_unlock(vnode_t); 172 int vn_stat(vnode_t, struct stat *); 173 int vn_access(vnode_t, int); 174 vnode_t vget(struct mount *, char *); 175 void vput(vnode_t); 176 void vgone(vnode_t); 177 void vref(vnode_t); 178 void vrele(vnode_t); 179 int vcount(vnode_t); 180 void vflush(struct mount *); 181 __END_DECLS 182 183 #endif /* !_SYS_VNODE_H_ */ /* [<][>][^][v][top][bottom][index][help] */ | |||
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Copyright© 2005-2009 Kohsuke Ohtani |
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