Annotation of prex-old/include/sys/vnode.h, Revision 1.1.1.1
1.1 nbrk 1: /*
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_refcount; /* 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:
83: /*
84: * Vnode attribute
85: */
86: struct vattr {
87: int va_type; /* vnode type */
88: mode_t va_mode; /* file access mode */
89: };
90:
91: /*
92: * Modes
93: */
94: #define VREAD 0x0004
95: #define VWRITE 0x0002
96: #define VEXEC 0x0001
97:
98: /*
99: * vnode operations
100: */
101: struct vnops {
102: int (*open) (vnode_t vp, mode_t mode);
103: int (*close) (vnode_t vp, file_t fp);
104: int (*read) (vnode_t vp, file_t fp, void *buf, size_t size, size_t *result);
105: int (*write) (vnode_t vp, file_t fp, void *buf, size_t size, size_t *result);
106: int (*seek) (vnode_t vp, file_t fp, off_t oldoff, off_t newoff);
107: int (*ioctl) (vnode_t vp, file_t fp, int cmd, u_long arg);
108: int (*fsync) (vnode_t vp, file_t fp);
109: int (*readdir) (vnode_t vp, file_t fp, struct dirent *dirent);
110: int (*lookup) (vnode_t dvp, char *name, vnode_t vp);
111: int (*create) (vnode_t dvp, char *name, mode_t mode);
112: int (*remove) (vnode_t dvp, vnode_t vp, char *name);
113: int (*rename) (vnode_t dvp1, vnode_t vp1, char *name1, vnode_t dvp2, vnode_t vp2, char *name2);
114: int (*mkdir) (vnode_t dvp, char *name, mode_t mode);
115: int (*rmdir) (vnode_t dvp, vnode_t vp, char *name);
116: int (*getattr) (vnode_t vp, struct vattr *vap);
117: int (*setattr) (vnode_t vp, struct vattr *vap);
118: int (*inactive) (vnode_t vp);
119: int (*truncate) (vnode_t vp);
120: };
121:
122: typedef int (*vnop_open_t) (vnode_t, mode_t);
123: typedef int (*vnop_close_t) (vnode_t, file_t);
124: typedef int (*vnop_read_t) (vnode_t, file_t, void *, size_t, size_t *);
125: typedef int (*vnop_write_t) (vnode_t, file_t, void *, size_t, size_t *);
126: typedef int (*vnop_seek_t) (vnode_t, file_t, off_t, off_t);
127: typedef int (*vnop_ioctl_t) (vnode_t, file_t, int, u_long);
128: typedef int (*vnop_fsync_t) (vnode_t, file_t);
129: typedef int (*vnop_readdir_t) (vnode_t, file_t, struct dirent *);
130: typedef int (*vnop_lookup_t) (vnode_t, char *, vnode_t);
131: typedef int (*vnop_create_t) (vnode_t, char *, mode_t);
132: typedef int (*vnop_remove_t) (vnode_t, vnode_t, char *);
133: typedef int (*vnop_rename_t) (vnode_t, vnode_t, char *, vnode_t, vnode_t, char *);
134: typedef int (*vnop_mkdir_t) (vnode_t, char *, mode_t);
135: typedef int (*vnop_rmdir_t) (vnode_t, vnode_t, char *);
136: typedef int (*vnop_getattr_t) (vnode_t, struct vattr *);
137: typedef int (*vnop_setattr_t) (vnode_t, struct vattr *);
138: typedef int (*vnop_inactive_t) (vnode_t);
139: typedef int (*vnop_truncate_t) (vnode_t);
140:
141: /*
142: * vnode interface
143: */
144: #define VOP_OPEN(VP, M) ((VP)->v_op->open)(VP, M)
145: #define VOP_CLOSE(VP, FP) ((VP)->v_op->close)(VP, FP)
146: #define VOP_READ(VP, FP, B, S, C) ((VP)->v_op->read)(VP, FP, B, S, C)
147: #define VOP_WRITE(VP, FP, B, S, C) ((VP)->v_op->write)(VP, FP, B, S, C)
148: #define VOP_SEEK(VP, FP, OLD, NEW) ((VP)->v_op->seek)(VP, FP, OLD, NEW)
149: #define VOP_IOCTL(VP, FP, C, A) ((VP)->v_op->ioctl)(VP, FP, C, A)
150: #define VOP_FSYNC(VP, FP) ((VP)->v_op->fsync)(VP, FP)
151: #define VOP_READDIR(VP, FP, DIR) ((VP)->v_op->readdir)(VP, FP, DIR)
152: #define VOP_LOOKUP(DVP, N, VP) ((DVP)->v_op->lookup)(DVP, N, VP)
153: #define VOP_CREATE(DVP, N, M) ((DVP)->v_op->create)(DVP, N, M)
154: #define VOP_REMOVE(DVP, VP, N) ((DVP)->v_op->remove)(DVP, VP, N)
155: #define VOP_RENAME(DVP1, VP1, N1, DVP2, VP2, N2) \
156: ((DVP1)->v_op->rename)(DVP1, VP1, N1, DVP2, VP2, N2)
157: #define VOP_MKDIR(DVP, N, M) ((DVP)->v_op->mkdir)(DVP, N, M)
158: #define VOP_RMDIR(DVP, VP, N) ((DVP)->v_op->rmdir)(DVP, VP, N)
159: #define VOP_GETATTR(VP, VAP) ((VP)->v_op->getattr)(VP, VAP)
160: #define VOP_SETATTR(VP, VAP) ((VP)->v_op->setattr)(VP, VAP)
161: #define VOP_INACTIVE(VP) ((VP)->v_op->inactive)(VP)
162: #define VOP_TRUNCATE(VP) ((VP)->v_op->truncate)(VP)
163:
164: __BEGIN_DECLS
165: int vop_nullop(void);
166: int vop_einval(void);
167: __END_DECLS
168:
169: #endif /* !_SYS_VNODE_H */
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