1/*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. 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 * 4. Neither the name of the University nor the names of its 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 REGENTS 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 REGENTS 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 * @(#)vnode.h 8.7 (Berkeley) 2/4/94
| 1/*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. 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 * 4. Neither the name of the University nor the names of its 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 REGENTS 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 REGENTS 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 * @(#)vnode.h 8.7 (Berkeley) 2/4/94
|
30 * $FreeBSD: head/sys/sys/vnode.h 183754 2008-10-10 21:23:50Z attilio $
| 30 * $FreeBSD: head/sys/sys/vnode.h 184413 2008-10-28 13:44:11Z trasz $
|
31 */
32
33#ifndef _SYS_VNODE_H_
34#define _SYS_VNODE_H_
35
36#include <sys/bufobj.h>
37#include <sys/queue.h>
38#include <sys/lock.h>
39#include <sys/lockmgr.h>
40#include <sys/mutex.h>
41#include <sys/selinfo.h>
42#include <sys/uio.h>
43#include <sys/acl.h>
44#include <sys/ktr.h>
45
46/*
47 * The vnode is the focus of all file activity in UNIX. There is a
48 * unique vnode allocated for each active file, each current directory,
49 * each mounted-on file, text file, and the root.
50 */
51
52/*
53 * Vnode types. VNON means no type.
54 */
55enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD,
56 VMARKER };
57
58/*
59 * Each underlying filesystem allocates its own private area and hangs
60 * it from v_data. If non-null, this area is freed in getnewvnode().
61 */
62
63struct namecache;
64
65struct vpollinfo {
66 struct mtx vpi_lock; /* lock to protect below */
67 struct selinfo vpi_selinfo; /* identity of poller(s) */
68 short vpi_events; /* what they are looking for */
69 short vpi_revents; /* what has happened */
70};
71
72/*
73 * Reading or writing any of these items requires holding the appropriate lock.
74 *
75 * Lock reference:
76 * c - namecache mutex
77 * f - freelist mutex
78 * G - Giant
79 * i - interlock
80 * m - mntvnodes mutex
81 * p - pollinfo lock
82 * s - spechash mutex
83 * S - syncer mutex
84 * u - Only a reference to the vnode is needed to read.
85 * v - vnode lock
86 *
87 * Vnodes may be found on many lists. The general way to deal with operating
88 * on a vnode that is on a list is:
89 * 1) Lock the list and find the vnode.
90 * 2) Lock interlock so that the vnode does not go away.
91 * 3) Unlock the list to avoid lock order reversals.
92 * 4) vget with LK_INTERLOCK and check for ENOENT, or
93 * 5) Check for DOOMED if the vnode lock is not required.
94 * 6) Perform your operation, then vput().
95 */
96
97#if defined(_KERNEL) || defined(_KVM_VNODE)
98
99struct vnode {
100 /*
101 * Fields which define the identity of the vnode. These fields are
102 * owned by the filesystem (XXX: and vgone() ?)
103 */
104 enum vtype v_type; /* u vnode type */
105 const char *v_tag; /* u type of underlying data */
106 struct vop_vector *v_op; /* u vnode operations vector */
107 void *v_data; /* u private data for fs */
108
109 /*
110 * Filesystem instance stuff
111 */
112 struct mount *v_mount; /* u ptr to vfs we are in */
113 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */
114
115 /*
116 * Type specific fields, only one applies to any given vnode.
117 * See #defines below for renaming to v_* namespace.
118 */
119 union {
120 struct mount *vu_mount; /* v ptr to mountpoint (VDIR) */
121 struct socket *vu_socket; /* v unix domain net (VSOCK) */
122 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */
123 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */
124 int vu_yield; /* yield count (VMARKER) */
125 } v_un;
126
127 /*
128 * vfs_hash: (mount + inode) -> vnode hash.
129 */
130 LIST_ENTRY(vnode) v_hashlist;
131 u_int v_hash;
132
133 /*
134 * VFS_namecache stuff
135 */
136 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */
137 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */
138 struct vnode *v_dd; /* c .. vnode */
139
140 /*
141 * clustering stuff
142 */
143 daddr_t v_cstart; /* v start block of cluster */
144 daddr_t v_lasta; /* v last allocation */
145 daddr_t v_lastw; /* v last write */
146 int v_clen; /* v length of cur. cluster */
147
148 /*
149 * Locking
150 */
151 struct lock v_lock; /* u (if fs don't have one) */
152 struct mtx v_interlock; /* lock for "i" things */
153 struct lock *v_vnlock; /* u pointer to vnode lock */
154 int v_holdcnt; /* i prevents recycling. */
155 int v_usecount; /* i ref count of users */
156 u_long v_iflag; /* i vnode flags (see below) */
157 u_long v_vflag; /* v vnode flags */
158 int v_writecount; /* v ref count of writers */
159
160 /*
161 * The machinery of being a vnode
162 */
163 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
164 struct bufobj v_bufobj; /* * Buffer cache object */
165
166 /*
167 * Hooks for various subsystems and features.
168 */
169 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */
170 struct label *v_label; /* MAC label for vnode */
171 struct lockf *v_lockf; /* Byte-level lock list */
172};
173
174#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */
175
176#define v_mountedhere v_un.vu_mount
177#define v_socket v_un.vu_socket
178#define v_rdev v_un.vu_cdev
179#define v_fifoinfo v_un.vu_fifoinfo
180#define v_yield v_un.vu_yield
181
182/* XXX: These are temporary to avoid a source sweep at this time */
183#define v_object v_bufobj.bo_object
184
185/*
186 * Userland version of struct vnode, for sysctl.
187 */
188struct xvnode {
189 size_t xv_size; /* sizeof(struct xvnode) */
190 void *xv_vnode; /* address of real vnode */
191 u_long xv_flag; /* vnode vflags */
192 int xv_usecount; /* reference count of users */
193 int xv_writecount; /* reference count of writers */
194 int xv_holdcnt; /* page & buffer references */
195 u_long xv_id; /* capability identifier */
196 void *xv_mount; /* address of parent mount */
197 long xv_numoutput; /* num of writes in progress */
198 enum vtype xv_type; /* vnode type */
199 union {
200 void *xvu_socket; /* socket, if VSOCK */
201 void *xvu_fifo; /* fifo, if VFIFO */
202 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */
203 struct {
204 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */
205 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */
206 } xv_uns;
207 } xv_un;
208};
209#define xv_socket xv_un.xvu_socket
210#define xv_fifo xv_un.xvu_fifo
211#define xv_rdev xv_un.xvu_rdev
212#define xv_dev xv_un.xv_uns.xvu_dev
213#define xv_ino xv_un.xv_uns.xvu_ino
214
215/* We don't need to lock the knlist */
216#define VN_KNLIST_EMPTY(vp) ((vp)->v_pollinfo == NULL || \
217 KNLIST_EMPTY(&(vp)->v_pollinfo->vpi_selinfo.si_note))
218
219#define VN_KNOTE(vp, b, a) \
220 do { \
221 if (!VN_KNLIST_EMPTY(vp)) \
222 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \
223 } while (0)
224#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1)
225#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0)
226
227/*
228 * Vnode flags.
229 * VI flags are protected by interlock and live in v_iflag
230 * VV flags are protected by the vnode lock and live in v_vflag
231 *
232 * VI_DOOMED is doubly protected by the interlock and vnode lock. Both
233 * are required for writing but the status may be checked with either.
234 */
235#define VI_MOUNT 0x0020 /* Mount in progress */
236#define VI_AGE 0x0040 /* Insert vnode at head of free list */
237#define VI_DOOMED 0x0080 /* This vnode is being recycled */
238#define VI_FREE 0x0100 /* This vnode is on the freelist */
239#define VI_OBJDIRTY 0x0400 /* object might be dirty */
240#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */
241#define VI_OWEINACT 0x1000 /* Need to call inactive */
242
243#define VV_ROOT 0x0001 /* root of its filesystem */
244#define VV_ISTTY 0x0002 /* vnode represents a tty */
245#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */
246#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */
247#define VV_TEXT 0x0020 /* vnode is a pure text prototype */
248#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */
249#define VV_SYSTEM 0x0080 /* vnode being used by kernel */
250#define VV_PROCDEP 0x0100 /* vnode is process dependent */
251#define VV_NOKNOTE 0x0200 /* don't activate knotes on this vnode */
252#define VV_DELETED 0x0400 /* should be removed */
253#define VV_MD 0x0800 /* vnode backs the md device */
254#define VV_FORCEINSMQ 0x1000 /* force the insmntque to succeed */
255
256/*
257 * Vnode attributes. A field value of VNOVAL represents a field whose value
258 * is unavailable (getattr) or which is not to be changed (setattr).
259 */
260struct vattr {
261 enum vtype va_type; /* vnode type (for create) */
262 u_short va_mode; /* files access mode and type */
263 short va_nlink; /* number of references to file */
264 uid_t va_uid; /* owner user id */
265 gid_t va_gid; /* owner group id */
266 dev_t va_fsid; /* filesystem id */
267 long va_fileid; /* file id */
268 u_quad_t va_size; /* file size in bytes */
269 long va_blocksize; /* blocksize preferred for i/o */
270 struct timespec va_atime; /* time of last access */
271 struct timespec va_mtime; /* time of last modification */
272 struct timespec va_ctime; /* time file changed */
273 struct timespec va_birthtime; /* time file created */
274 u_long va_gen; /* generation number of file */
275 u_long va_flags; /* flags defined for file */
276 dev_t va_rdev; /* device the special file represents */
277 u_quad_t va_bytes; /* bytes of disk space held by file */
278 u_quad_t va_filerev; /* file modification number */
279 u_int va_vaflags; /* operations flags, see below */
280 long va_spare; /* remain quad aligned */
281};
282
283/*
284 * Flags for va_vaflags.
285 */
286#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
287#define VA_EXCLUSIVE 0x02 /* exclusive create request */
288#define VA_MARK_ATIME 0x04 /* setting atime for execve/mmap */
289
290/*
291 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
292 * help with write clustering)
293 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h
294 */
295#define IO_UNIT 0x0001 /* do I/O as atomic unit */
296#define IO_APPEND 0x0002 /* append write to end */
297#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */
298#define IO_NODELOCKED 0x0008 /* underlying node already locked */
299#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */
300#define IO_VMIO 0x0020 /* data already in VMIO space */
301#define IO_INVAL 0x0040 /* invalidate after I/O */
302#define IO_SYNC 0x0080 /* do I/O synchronously */
303#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
304#define IO_EXT 0x0400 /* operate on external attributes */
305#define IO_NORMAL 0x0800 /* operate on regular data */
306#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
307
308#define IO_SEQMAX 0x7F /* seq heuristic max value */
309#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
310
311/*
| 31 */
32
33#ifndef _SYS_VNODE_H_
34#define _SYS_VNODE_H_
35
36#include <sys/bufobj.h>
37#include <sys/queue.h>
38#include <sys/lock.h>
39#include <sys/lockmgr.h>
40#include <sys/mutex.h>
41#include <sys/selinfo.h>
42#include <sys/uio.h>
43#include <sys/acl.h>
44#include <sys/ktr.h>
45
46/*
47 * The vnode is the focus of all file activity in UNIX. There is a
48 * unique vnode allocated for each active file, each current directory,
49 * each mounted-on file, text file, and the root.
50 */
51
52/*
53 * Vnode types. VNON means no type.
54 */
55enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD,
56 VMARKER };
57
58/*
59 * Each underlying filesystem allocates its own private area and hangs
60 * it from v_data. If non-null, this area is freed in getnewvnode().
61 */
62
63struct namecache;
64
65struct vpollinfo {
66 struct mtx vpi_lock; /* lock to protect below */
67 struct selinfo vpi_selinfo; /* identity of poller(s) */
68 short vpi_events; /* what they are looking for */
69 short vpi_revents; /* what has happened */
70};
71
72/*
73 * Reading or writing any of these items requires holding the appropriate lock.
74 *
75 * Lock reference:
76 * c - namecache mutex
77 * f - freelist mutex
78 * G - Giant
79 * i - interlock
80 * m - mntvnodes mutex
81 * p - pollinfo lock
82 * s - spechash mutex
83 * S - syncer mutex
84 * u - Only a reference to the vnode is needed to read.
85 * v - vnode lock
86 *
87 * Vnodes may be found on many lists. The general way to deal with operating
88 * on a vnode that is on a list is:
89 * 1) Lock the list and find the vnode.
90 * 2) Lock interlock so that the vnode does not go away.
91 * 3) Unlock the list to avoid lock order reversals.
92 * 4) vget with LK_INTERLOCK and check for ENOENT, or
93 * 5) Check for DOOMED if the vnode lock is not required.
94 * 6) Perform your operation, then vput().
95 */
96
97#if defined(_KERNEL) || defined(_KVM_VNODE)
98
99struct vnode {
100 /*
101 * Fields which define the identity of the vnode. These fields are
102 * owned by the filesystem (XXX: and vgone() ?)
103 */
104 enum vtype v_type; /* u vnode type */
105 const char *v_tag; /* u type of underlying data */
106 struct vop_vector *v_op; /* u vnode operations vector */
107 void *v_data; /* u private data for fs */
108
109 /*
110 * Filesystem instance stuff
111 */
112 struct mount *v_mount; /* u ptr to vfs we are in */
113 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */
114
115 /*
116 * Type specific fields, only one applies to any given vnode.
117 * See #defines below for renaming to v_* namespace.
118 */
119 union {
120 struct mount *vu_mount; /* v ptr to mountpoint (VDIR) */
121 struct socket *vu_socket; /* v unix domain net (VSOCK) */
122 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */
123 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */
124 int vu_yield; /* yield count (VMARKER) */
125 } v_un;
126
127 /*
128 * vfs_hash: (mount + inode) -> vnode hash.
129 */
130 LIST_ENTRY(vnode) v_hashlist;
131 u_int v_hash;
132
133 /*
134 * VFS_namecache stuff
135 */
136 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */
137 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */
138 struct vnode *v_dd; /* c .. vnode */
139
140 /*
141 * clustering stuff
142 */
143 daddr_t v_cstart; /* v start block of cluster */
144 daddr_t v_lasta; /* v last allocation */
145 daddr_t v_lastw; /* v last write */
146 int v_clen; /* v length of cur. cluster */
147
148 /*
149 * Locking
150 */
151 struct lock v_lock; /* u (if fs don't have one) */
152 struct mtx v_interlock; /* lock for "i" things */
153 struct lock *v_vnlock; /* u pointer to vnode lock */
154 int v_holdcnt; /* i prevents recycling. */
155 int v_usecount; /* i ref count of users */
156 u_long v_iflag; /* i vnode flags (see below) */
157 u_long v_vflag; /* v vnode flags */
158 int v_writecount; /* v ref count of writers */
159
160 /*
161 * The machinery of being a vnode
162 */
163 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
164 struct bufobj v_bufobj; /* * Buffer cache object */
165
166 /*
167 * Hooks for various subsystems and features.
168 */
169 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */
170 struct label *v_label; /* MAC label for vnode */
171 struct lockf *v_lockf; /* Byte-level lock list */
172};
173
174#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */
175
176#define v_mountedhere v_un.vu_mount
177#define v_socket v_un.vu_socket
178#define v_rdev v_un.vu_cdev
179#define v_fifoinfo v_un.vu_fifoinfo
180#define v_yield v_un.vu_yield
181
182/* XXX: These are temporary to avoid a source sweep at this time */
183#define v_object v_bufobj.bo_object
184
185/*
186 * Userland version of struct vnode, for sysctl.
187 */
188struct xvnode {
189 size_t xv_size; /* sizeof(struct xvnode) */
190 void *xv_vnode; /* address of real vnode */
191 u_long xv_flag; /* vnode vflags */
192 int xv_usecount; /* reference count of users */
193 int xv_writecount; /* reference count of writers */
194 int xv_holdcnt; /* page & buffer references */
195 u_long xv_id; /* capability identifier */
196 void *xv_mount; /* address of parent mount */
197 long xv_numoutput; /* num of writes in progress */
198 enum vtype xv_type; /* vnode type */
199 union {
200 void *xvu_socket; /* socket, if VSOCK */
201 void *xvu_fifo; /* fifo, if VFIFO */
202 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */
203 struct {
204 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */
205 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */
206 } xv_uns;
207 } xv_un;
208};
209#define xv_socket xv_un.xvu_socket
210#define xv_fifo xv_un.xvu_fifo
211#define xv_rdev xv_un.xvu_rdev
212#define xv_dev xv_un.xv_uns.xvu_dev
213#define xv_ino xv_un.xv_uns.xvu_ino
214
215/* We don't need to lock the knlist */
216#define VN_KNLIST_EMPTY(vp) ((vp)->v_pollinfo == NULL || \
217 KNLIST_EMPTY(&(vp)->v_pollinfo->vpi_selinfo.si_note))
218
219#define VN_KNOTE(vp, b, a) \
220 do { \
221 if (!VN_KNLIST_EMPTY(vp)) \
222 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \
223 } while (0)
224#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1)
225#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0)
226
227/*
228 * Vnode flags.
229 * VI flags are protected by interlock and live in v_iflag
230 * VV flags are protected by the vnode lock and live in v_vflag
231 *
232 * VI_DOOMED is doubly protected by the interlock and vnode lock. Both
233 * are required for writing but the status may be checked with either.
234 */
235#define VI_MOUNT 0x0020 /* Mount in progress */
236#define VI_AGE 0x0040 /* Insert vnode at head of free list */
237#define VI_DOOMED 0x0080 /* This vnode is being recycled */
238#define VI_FREE 0x0100 /* This vnode is on the freelist */
239#define VI_OBJDIRTY 0x0400 /* object might be dirty */
240#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */
241#define VI_OWEINACT 0x1000 /* Need to call inactive */
242
243#define VV_ROOT 0x0001 /* root of its filesystem */
244#define VV_ISTTY 0x0002 /* vnode represents a tty */
245#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */
246#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */
247#define VV_TEXT 0x0020 /* vnode is a pure text prototype */
248#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */
249#define VV_SYSTEM 0x0080 /* vnode being used by kernel */
250#define VV_PROCDEP 0x0100 /* vnode is process dependent */
251#define VV_NOKNOTE 0x0200 /* don't activate knotes on this vnode */
252#define VV_DELETED 0x0400 /* should be removed */
253#define VV_MD 0x0800 /* vnode backs the md device */
254#define VV_FORCEINSMQ 0x1000 /* force the insmntque to succeed */
255
256/*
257 * Vnode attributes. A field value of VNOVAL represents a field whose value
258 * is unavailable (getattr) or which is not to be changed (setattr).
259 */
260struct vattr {
261 enum vtype va_type; /* vnode type (for create) */
262 u_short va_mode; /* files access mode and type */
263 short va_nlink; /* number of references to file */
264 uid_t va_uid; /* owner user id */
265 gid_t va_gid; /* owner group id */
266 dev_t va_fsid; /* filesystem id */
267 long va_fileid; /* file id */
268 u_quad_t va_size; /* file size in bytes */
269 long va_blocksize; /* blocksize preferred for i/o */
270 struct timespec va_atime; /* time of last access */
271 struct timespec va_mtime; /* time of last modification */
272 struct timespec va_ctime; /* time file changed */
273 struct timespec va_birthtime; /* time file created */
274 u_long va_gen; /* generation number of file */
275 u_long va_flags; /* flags defined for file */
276 dev_t va_rdev; /* device the special file represents */
277 u_quad_t va_bytes; /* bytes of disk space held by file */
278 u_quad_t va_filerev; /* file modification number */
279 u_int va_vaflags; /* operations flags, see below */
280 long va_spare; /* remain quad aligned */
281};
282
283/*
284 * Flags for va_vaflags.
285 */
286#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
287#define VA_EXCLUSIVE 0x02 /* exclusive create request */
288#define VA_MARK_ATIME 0x04 /* setting atime for execve/mmap */
289
290/*
291 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
292 * help with write clustering)
293 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h
294 */
295#define IO_UNIT 0x0001 /* do I/O as atomic unit */
296#define IO_APPEND 0x0002 /* append write to end */
297#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */
298#define IO_NODELOCKED 0x0008 /* underlying node already locked */
299#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */
300#define IO_VMIO 0x0020 /* data already in VMIO space */
301#define IO_INVAL 0x0040 /* invalidate after I/O */
302#define IO_SYNC 0x0080 /* do I/O synchronously */
303#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
304#define IO_EXT 0x0400 /* operate on external attributes */
305#define IO_NORMAL 0x0800 /* operate on regular data */
306#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
307
308#define IO_SEQMAX 0x7F /* seq heuristic max value */
309#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
310
311/*
|
312 * Modes. Some values same as Ixxx entries from inode.h for now.
| 312 * Flags for accmode_t.
|
313 */
314#define VEXEC 000100 /* execute/search permission */
315#define VWRITE 000200 /* write permission */
316#define VREAD 000400 /* read permission */
317#define VADMIN 010000 /* permission to administer */
318#define VSTAT 020000 /* permission to retrieve attrs */
319#define VAPPEND 040000 /* permission to write/append */
320#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND)
321
322/*
323 * Token indicating no attribute value yet assigned.
324 */
325#define VNOVAL (-1)
326
327/*
328 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
329 */
330#define VLKTIMEOUT (hz / 20 + 1)
331
332#ifdef _KERNEL
333
334#ifdef MALLOC_DECLARE
335MALLOC_DECLARE(M_VNODE);
336#endif
337
338/*
339 * Convert between vnode types and inode formats (since POSIX.1
340 * defines mode word of stat structure in terms of inode formats).
341 */
342extern enum vtype iftovt_tab[];
343extern int vttoif_tab[];
344#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
345#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
346#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
347
348/*
349 * Flags to various vnode functions.
350 */
351#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
352#define FORCECLOSE 0x0002 /* vflush: force file closure */
353#define WRITECLOSE 0x0004 /* vflush: only close writable files */
354#define DOCLOSE 0x0008 /* vclean: close active files */
355#define V_SAVE 0x0001 /* vinvalbuf: sync file first */
356#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */
357#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */
358#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
359#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */
360#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */
361#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */
362
363#define VREF(vp) vref(vp)
364
365#ifdef DIAGNOSTIC
366#define VATTR_NULL(vap) vattr_null(vap)
367#else
368#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
369#endif /* DIAGNOSTIC */
370
371#define NULLVP ((struct vnode *)NULL)
372
373/*
374 * Global vnode data.
375 */
376extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
377extern int async_io_version; /* 0 or POSIX version of AIO i'face */
378extern int desiredvnodes; /* number of vnodes desired */
379extern struct uma_zone *namei_zone;
380extern int prtactive; /* nonzero to call vprint() */
381extern struct vattr va_null; /* predefined null vattr structure */
382
383/*
384 * Macro/function to check for client cache inconsistency w.r.t. leasing.
385 */
386#define LEASE_READ 0x1 /* Check lease for readers */
387#define LEASE_WRITE 0x2 /* Check lease for modifiers */
388
389extern void (*lease_updatetime)(int deltat);
390
391#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock)
392#define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags))
393#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock)
394#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock)
395#define VI_MTX(vp) (&(vp)->v_interlock)
396
397#define VN_LOCK_AREC(vp) \
398 ((vp)->v_vnlock->lock_object.lo_flags |= LK_CANRECURSE)
399#define VN_LOCK_ASHARE(vp) \
400 ((vp)->v_vnlock->lock_object.lo_flags &= ~LK_NOSHARE)
401
402#endif /* _KERNEL */
403
404/*
405 * Mods for extensibility.
406 */
407
408/*
409 * Flags for vdesc_flags:
410 */
411#define VDESC_MAX_VPS 16
412/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
413#define VDESC_VP0_WILLRELE 0x0001
414#define VDESC_VP1_WILLRELE 0x0002
415#define VDESC_VP2_WILLRELE 0x0004
416#define VDESC_VP3_WILLRELE 0x0008
417#define VDESC_NOMAP_VPP 0x0100
418#define VDESC_VPP_WILLRELE 0x0200
419
420/*
421 * A generic structure.
422 * This can be used by bypass routines to identify generic arguments.
423 */
424struct vop_generic_args {
425 struct vnodeop_desc *a_desc;
426 /* other random data follows, presumably */
427};
428
429typedef int vop_bypass_t(struct vop_generic_args *);
430
431/*
432 * VDESC_NO_OFFSET is used to identify the end of the offset list
433 * and in places where no such field exists.
434 */
435#define VDESC_NO_OFFSET -1
436
437/*
438 * This structure describes the vnode operation taking place.
439 */
440struct vnodeop_desc {
441 char *vdesc_name; /* a readable name for debugging */
442 int vdesc_flags; /* VDESC_* flags */
443 vop_bypass_t *vdesc_call; /* Function to call */
444
445 /*
446 * These ops are used by bypass routines to map and locate arguments.
447 * Creds and procs are not needed in bypass routines, but sometimes
448 * they are useful to (for example) transport layers.
449 * Nameidata is useful because it has a cred in it.
450 */
451 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
452 int vdesc_vpp_offset; /* return vpp location */
453 int vdesc_cred_offset; /* cred location, if any */
454 int vdesc_thread_offset; /* thread location, if any */
455 int vdesc_componentname_offset; /* if any */
456};
457
458#ifdef _KERNEL
459/*
460 * A list of all the operation descs.
461 */
462extern struct vnodeop_desc *vnodeop_descs[];
463
464#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field)
465#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \
466 ((s_type)(((char*)(struct_p)) + (s_offset)))
467
468
469#ifdef DEBUG_VFS_LOCKS
470/*
471 * Support code to aid in debugging VFS locking problems. Not totally
472 * reliable since if the thread sleeps between changing the lock
473 * state and checking it with the assert, some other thread could
474 * change the state. They are good enough for debugging a single
475 * filesystem using a single-threaded test.
476 */
477void assert_vi_locked(struct vnode *vp, const char *str);
478void assert_vi_unlocked(struct vnode *vp, const char *str);
479void assert_vop_elocked(struct vnode *vp, const char *str);
480#if 0
481void assert_vop_elocked_other(struct vnode *vp, const char *str);
482#endif
483void assert_vop_locked(struct vnode *vp, const char *str);
484#if 0
485voi0 assert_vop_slocked(struct vnode *vp, const char *str);
486#endif
487void assert_vop_unlocked(struct vnode *vp, const char *str);
488
489#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str))
490#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str))
491#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str))
492#if 0
493#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
494#endif
495#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str))
496#if 0
497#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str))
498#endif
499#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str))
500
501#else /* !DEBUG_VFS_LOCKS */
502
503#define ASSERT_VI_LOCKED(vp, str)
504#define ASSERT_VI_UNLOCKED(vp, str)
505#define ASSERT_VOP_ELOCKED(vp, str)
506#if 0
507#define ASSERT_VOP_ELOCKED_OTHER(vp, str)
508#endif
509#define ASSERT_VOP_LOCKED(vp, str)
510#if 0
511#define ASSERT_VOP_SLOCKED(vp, str)
512#endif
513#define ASSERT_VOP_UNLOCKED(vp, str)
514#endif /* DEBUG_VFS_LOCKS */
515
516
517/*
518 * This call works for vnodes in the kernel.
519 */
520#define VCALL(c) ((c)->a_desc->vdesc_call(c))
521
522/*
523 * VMIO support inline
524 */
525
526extern int vmiodirenable;
527
528static __inline int
529vn_canvmio(struct vnode *vp)
530{
531 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
532 return(TRUE);
533 return(FALSE);
534}
535
536/*
537 * Finally, include the default set of vnode operations.
538 */
539#include "vnode_if.h"
540
541/*
542 * Public vnode manipulation functions.
543 */
544struct componentname;
545struct file;
546struct mount;
547struct nameidata;
548struct ostat;
549struct thread;
550struct proc;
551struct stat;
552struct nstat;
553struct ucred;
554struct uio;
555struct vattr;
556struct vnode;
557
558extern int (*lease_check_hook)(struct vop_lease_args *);
559
560/* cache_* may belong in namei.h. */
561void cache_enter(struct vnode *dvp, struct vnode *vp,
562 struct componentname *cnp);
563int cache_lookup(struct vnode *dvp, struct vnode **vpp,
564 struct componentname *cnp);
565void cache_purge(struct vnode *vp);
566void cache_purgevfs(struct mount *mp);
567int change_dir(struct vnode *vp, struct thread *td);
568int change_root(struct vnode *vp, struct thread *td);
569void cvtstat(struct stat *st, struct ostat *ost);
570void cvtnstat(struct stat *sb, struct nstat *nsb);
571int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops,
572 struct vnode **vpp);
573int insmntque1(struct vnode *vp, struct mount *mp,
574 void (*dtr)(struct vnode *, void *), void *dtr_arg);
575int insmntque(struct vnode *vp, struct mount *mp);
576u_quad_t init_va_filerev(void);
577int lease_check(struct vop_lease_args *ap);
578int speedup_syncer(void);
579#define textvp_fullpath(p, rb, rfb) \
580 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
581int vn_fullpath(struct thread *td, struct vnode *vn,
582 char **retbuf, char **freebuf);
583int vn_fullpath_global(struct thread *td, struct vnode *vn,
584 char **retbuf, char **freebuf);
585int vn_commname(struct vnode *vn, char *buf, u_int buflen);
586int vaccess(enum vtype type, mode_t file_mode, uid_t file_uid,
| 313 */
314#define VEXEC 000100 /* execute/search permission */
315#define VWRITE 000200 /* write permission */
316#define VREAD 000400 /* read permission */
317#define VADMIN 010000 /* permission to administer */
318#define VSTAT 020000 /* permission to retrieve attrs */
319#define VAPPEND 040000 /* permission to write/append */
320#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND)
321
322/*
323 * Token indicating no attribute value yet assigned.
324 */
325#define VNOVAL (-1)
326
327/*
328 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
329 */
330#define VLKTIMEOUT (hz / 20 + 1)
331
332#ifdef _KERNEL
333
334#ifdef MALLOC_DECLARE
335MALLOC_DECLARE(M_VNODE);
336#endif
337
338/*
339 * Convert between vnode types and inode formats (since POSIX.1
340 * defines mode word of stat structure in terms of inode formats).
341 */
342extern enum vtype iftovt_tab[];
343extern int vttoif_tab[];
344#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
345#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
346#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
347
348/*
349 * Flags to various vnode functions.
350 */
351#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
352#define FORCECLOSE 0x0002 /* vflush: force file closure */
353#define WRITECLOSE 0x0004 /* vflush: only close writable files */
354#define DOCLOSE 0x0008 /* vclean: close active files */
355#define V_SAVE 0x0001 /* vinvalbuf: sync file first */
356#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */
357#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */
358#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
359#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */
360#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */
361#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */
362
363#define VREF(vp) vref(vp)
364
365#ifdef DIAGNOSTIC
366#define VATTR_NULL(vap) vattr_null(vap)
367#else
368#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
369#endif /* DIAGNOSTIC */
370
371#define NULLVP ((struct vnode *)NULL)
372
373/*
374 * Global vnode data.
375 */
376extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
377extern int async_io_version; /* 0 or POSIX version of AIO i'face */
378extern int desiredvnodes; /* number of vnodes desired */
379extern struct uma_zone *namei_zone;
380extern int prtactive; /* nonzero to call vprint() */
381extern struct vattr va_null; /* predefined null vattr structure */
382
383/*
384 * Macro/function to check for client cache inconsistency w.r.t. leasing.
385 */
386#define LEASE_READ 0x1 /* Check lease for readers */
387#define LEASE_WRITE 0x2 /* Check lease for modifiers */
388
389extern void (*lease_updatetime)(int deltat);
390
391#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock)
392#define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags))
393#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock)
394#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock)
395#define VI_MTX(vp) (&(vp)->v_interlock)
396
397#define VN_LOCK_AREC(vp) \
398 ((vp)->v_vnlock->lock_object.lo_flags |= LK_CANRECURSE)
399#define VN_LOCK_ASHARE(vp) \
400 ((vp)->v_vnlock->lock_object.lo_flags &= ~LK_NOSHARE)
401
402#endif /* _KERNEL */
403
404/*
405 * Mods for extensibility.
406 */
407
408/*
409 * Flags for vdesc_flags:
410 */
411#define VDESC_MAX_VPS 16
412/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
413#define VDESC_VP0_WILLRELE 0x0001
414#define VDESC_VP1_WILLRELE 0x0002
415#define VDESC_VP2_WILLRELE 0x0004
416#define VDESC_VP3_WILLRELE 0x0008
417#define VDESC_NOMAP_VPP 0x0100
418#define VDESC_VPP_WILLRELE 0x0200
419
420/*
421 * A generic structure.
422 * This can be used by bypass routines to identify generic arguments.
423 */
424struct vop_generic_args {
425 struct vnodeop_desc *a_desc;
426 /* other random data follows, presumably */
427};
428
429typedef int vop_bypass_t(struct vop_generic_args *);
430
431/*
432 * VDESC_NO_OFFSET is used to identify the end of the offset list
433 * and in places where no such field exists.
434 */
435#define VDESC_NO_OFFSET -1
436
437/*
438 * This structure describes the vnode operation taking place.
439 */
440struct vnodeop_desc {
441 char *vdesc_name; /* a readable name for debugging */
442 int vdesc_flags; /* VDESC_* flags */
443 vop_bypass_t *vdesc_call; /* Function to call */
444
445 /*
446 * These ops are used by bypass routines to map and locate arguments.
447 * Creds and procs are not needed in bypass routines, but sometimes
448 * they are useful to (for example) transport layers.
449 * Nameidata is useful because it has a cred in it.
450 */
451 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
452 int vdesc_vpp_offset; /* return vpp location */
453 int vdesc_cred_offset; /* cred location, if any */
454 int vdesc_thread_offset; /* thread location, if any */
455 int vdesc_componentname_offset; /* if any */
456};
457
458#ifdef _KERNEL
459/*
460 * A list of all the operation descs.
461 */
462extern struct vnodeop_desc *vnodeop_descs[];
463
464#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field)
465#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \
466 ((s_type)(((char*)(struct_p)) + (s_offset)))
467
468
469#ifdef DEBUG_VFS_LOCKS
470/*
471 * Support code to aid in debugging VFS locking problems. Not totally
472 * reliable since if the thread sleeps between changing the lock
473 * state and checking it with the assert, some other thread could
474 * change the state. They are good enough for debugging a single
475 * filesystem using a single-threaded test.
476 */
477void assert_vi_locked(struct vnode *vp, const char *str);
478void assert_vi_unlocked(struct vnode *vp, const char *str);
479void assert_vop_elocked(struct vnode *vp, const char *str);
480#if 0
481void assert_vop_elocked_other(struct vnode *vp, const char *str);
482#endif
483void assert_vop_locked(struct vnode *vp, const char *str);
484#if 0
485voi0 assert_vop_slocked(struct vnode *vp, const char *str);
486#endif
487void assert_vop_unlocked(struct vnode *vp, const char *str);
488
489#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str))
490#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str))
491#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str))
492#if 0
493#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
494#endif
495#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str))
496#if 0
497#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str))
498#endif
499#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str))
500
501#else /* !DEBUG_VFS_LOCKS */
502
503#define ASSERT_VI_LOCKED(vp, str)
504#define ASSERT_VI_UNLOCKED(vp, str)
505#define ASSERT_VOP_ELOCKED(vp, str)
506#if 0
507#define ASSERT_VOP_ELOCKED_OTHER(vp, str)
508#endif
509#define ASSERT_VOP_LOCKED(vp, str)
510#if 0
511#define ASSERT_VOP_SLOCKED(vp, str)
512#endif
513#define ASSERT_VOP_UNLOCKED(vp, str)
514#endif /* DEBUG_VFS_LOCKS */
515
516
517/*
518 * This call works for vnodes in the kernel.
519 */
520#define VCALL(c) ((c)->a_desc->vdesc_call(c))
521
522/*
523 * VMIO support inline
524 */
525
526extern int vmiodirenable;
527
528static __inline int
529vn_canvmio(struct vnode *vp)
530{
531 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
532 return(TRUE);
533 return(FALSE);
534}
535
536/*
537 * Finally, include the default set of vnode operations.
538 */
539#include "vnode_if.h"
540
541/*
542 * Public vnode manipulation functions.
543 */
544struct componentname;
545struct file;
546struct mount;
547struct nameidata;
548struct ostat;
549struct thread;
550struct proc;
551struct stat;
552struct nstat;
553struct ucred;
554struct uio;
555struct vattr;
556struct vnode;
557
558extern int (*lease_check_hook)(struct vop_lease_args *);
559
560/* cache_* may belong in namei.h. */
561void cache_enter(struct vnode *dvp, struct vnode *vp,
562 struct componentname *cnp);
563int cache_lookup(struct vnode *dvp, struct vnode **vpp,
564 struct componentname *cnp);
565void cache_purge(struct vnode *vp);
566void cache_purgevfs(struct mount *mp);
567int change_dir(struct vnode *vp, struct thread *td);
568int change_root(struct vnode *vp, struct thread *td);
569void cvtstat(struct stat *st, struct ostat *ost);
570void cvtnstat(struct stat *sb, struct nstat *nsb);
571int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops,
572 struct vnode **vpp);
573int insmntque1(struct vnode *vp, struct mount *mp,
574 void (*dtr)(struct vnode *, void *), void *dtr_arg);
575int insmntque(struct vnode *vp, struct mount *mp);
576u_quad_t init_va_filerev(void);
577int lease_check(struct vop_lease_args *ap);
578int speedup_syncer(void);
579#define textvp_fullpath(p, rb, rfb) \
580 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
581int vn_fullpath(struct thread *td, struct vnode *vn,
582 char **retbuf, char **freebuf);
583int vn_fullpath_global(struct thread *td, struct vnode *vn,
584 char **retbuf, char **freebuf);
585int vn_commname(struct vnode *vn, char *buf, u_int buflen);
586int vaccess(enum vtype type, mode_t file_mode, uid_t file_uid,
|
587 gid_t file_gid, mode_t acc_mode, struct ucred *cred,
| 587 gid_t file_gid, accmode_t accmode, struct ucred *cred,
|
588 int *privused);
589int vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
| 588 int *privused);
589int vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
|
590 gid_t file_gid, struct acl *acl, mode_t acc_mode,
| 590 gid_t file_gid, struct acl *acl, accmode_t accmode,
|
591 struct ucred *cred, int *privused);
592void vattr_null(struct vattr *vap);
593int vcount(struct vnode *vp);
594void vdrop(struct vnode *);
595void vdropl(struct vnode *);
596int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td);
597int vget(struct vnode *vp, int lockflag, struct thread *td);
598void vgone(struct vnode *vp);
599void vhold(struct vnode *);
600void vholdl(struct vnode *);
601int vinvalbuf(struct vnode *vp, int save, int slpflag, int slptimeo);
602int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
603 off_t length, int blksize);
604void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3);
605#define vprint(label, vp) vn_printf((vp), "%s\n", (label))
606int vrecycle(struct vnode *vp, struct thread *td);
607int vn_close(struct vnode *vp,
608 int flags, struct ucred *file_cred, struct thread *td);
609void vn_finished_write(struct mount *mp);
610void vn_finished_secondary_write(struct mount *mp);
611int vn_isdisk(struct vnode *vp, int *errp);
612int _vn_lock(struct vnode *vp, int flags, char *file, int line);
613#define vn_lock(vp, flags) _vn_lock(vp, flags, __FILE__, __LINE__)
614int vn_open(struct nameidata *ndp, int *flagp, int cmode, struct file *fp);
615int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
616 struct ucred *cred, struct file *fp);
617int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
618int vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base,
619 int len, off_t offset, enum uio_seg segflg, int ioflg,
620 struct ucred *active_cred, struct ucred *file_cred, int *aresid,
621 struct thread *td);
622int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, void *base,
623 size_t len, off_t offset, enum uio_seg segflg, int ioflg,
624 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid,
625 struct thread *td);
626int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
627 struct ucred *file_cred, struct thread *td);
628int vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
629int vn_start_secondary_write(struct vnode *vp, struct mount **mpp,
630 int flags);
631int vn_writechk(struct vnode *vp);
632int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
633 const char *attrname, int *buflen, char *buf, struct thread *td);
634int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
635 const char *attrname, int buflen, char *buf, struct thread *td);
636int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
637 const char *attrname, struct thread *td);
638int vfs_cache_lookup(struct vop_lookup_args *ap);
639void vfs_timestamp(struct timespec *);
640void vfs_write_resume(struct mount *mp);
641int vfs_write_suspend(struct mount *mp);
642int vop_stdbmap(struct vop_bmap_args *);
643int vop_stdfsync(struct vop_fsync_args *);
644int vop_stdgetwritemount(struct vop_getwritemount_args *);
645int vop_stdgetpages(struct vop_getpages_args *);
646int vop_stdinactive(struct vop_inactive_args *);
647int vop_stdislocked(struct vop_islocked_args *);
648int vop_stdkqfilter(struct vop_kqfilter_args *);
649int vop_stdlock(struct vop_lock1_args *);
650int vop_stdputpages(struct vop_putpages_args *);
651int vop_stdunlock(struct vop_unlock_args *);
652int vop_nopoll(struct vop_poll_args *);
653int vop_stdadvlock(struct vop_advlock_args *ap);
654int vop_stdadvlockasync(struct vop_advlockasync_args *ap);
655int vop_stdpathconf(struct vop_pathconf_args *);
656int vop_stdpoll(struct vop_poll_args *);
657int vop_stdvptofh(struct vop_vptofh_args *ap);
658int vop_eopnotsupp(struct vop_generic_args *ap);
659int vop_ebadf(struct vop_generic_args *ap);
660int vop_einval(struct vop_generic_args *ap);
661int vop_enotty(struct vop_generic_args *ap);
662int vop_null(struct vop_generic_args *ap);
663int vop_panic(struct vop_generic_args *ap);
664
665/* These are called from within the actual VOPS. */
666void vop_create_post(void *a, int rc);
667void vop_link_post(void *a, int rc);
668void vop_lock_pre(void *a);
669void vop_lock_post(void *a, int rc);
670void vop_lookup_post(void *a, int rc);
671void vop_lookup_pre(void *a);
672void vop_mkdir_post(void *a, int rc);
673void vop_mknod_post(void *a, int rc);
674void vop_remove_post(void *a, int rc);
675void vop_rename_post(void *a, int rc);
676void vop_rename_pre(void *a);
677void vop_rmdir_post(void *a, int rc);
678void vop_setattr_post(void *a, int rc);
679void vop_strategy_pre(void *a);
680void vop_symlink_post(void *a, int rc);
681void vop_unlock_post(void *a, int rc);
682void vop_unlock_pre(void *a);
683
684#define VOP_WRITE_PRE(ap) \
685 struct vattr va; \
686 int error, osize, ooffset, noffset; \
687 \
688 osize = ooffset = noffset = 0; \
689 if (!VN_KNLIST_EMPTY((ap)->a_vp)) { \
690 error = VOP_GETATTR((ap)->a_vp, &va, (ap)->a_cred); \
691 if (error) \
692 return (error); \
693 ooffset = (ap)->a_uio->uio_offset; \
694 osize = va.va_size; \
695 }
696
697#define VOP_WRITE_POST(ap, ret) \
698 noffset = (ap)->a_uio->uio_offset; \
699 if (noffset > ooffset && !VN_KNLIST_EMPTY((ap)->a_vp)) { \
700 VFS_KNOTE_LOCKED((ap)->a_vp, NOTE_WRITE \
701 | (noffset > osize ? NOTE_EXTEND : 0)); \
702 }
703
704#define VOP_LOCK(vp, flags) VOP_LOCK1(vp, flags, __FILE__, __LINE__)
705
706
707void vput(struct vnode *vp);
708void vrele(struct vnode *vp);
709void vref(struct vnode *vp);
710int vrefcnt(struct vnode *vp);
711void v_addpollinfo(struct vnode *vp);
712
713int vnode_create_vobject(struct vnode *vp, off_t size, struct thread *td);
714void vnode_destroy_vobject(struct vnode *vp);
715
716extern struct vop_vector fifo_specops;
717extern struct vop_vector dead_vnodeops;
718extern struct vop_vector default_vnodeops;
719
720#define VOP_PANIC ((void*)(uintptr_t)vop_panic)
721#define VOP_NULL ((void*)(uintptr_t)vop_null)
722#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf)
723#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty)
724#define VOP_EINVAL ((void*)(uintptr_t)vop_einval)
725#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp)
726
727/* vfs_hash.c */
728typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg);
729
730int vfs_hash_get(const struct mount *mp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg);
731int vfs_hash_insert(struct vnode *vp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg);
732void vfs_hash_rehash(struct vnode *vp, u_int hash);
733void vfs_hash_remove(struct vnode *vp);
734
735int vfs_kqfilter(struct vop_kqfilter_args *);
736void vfs_mark_atime(struct vnode *vp, struct ucred *cred);
737struct dirent;
738int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off);
739
740#endif /* _KERNEL */
741
742#endif /* !_SYS_VNODE_H_ */
| 591 struct ucred *cred, int *privused);
592void vattr_null(struct vattr *vap);
593int vcount(struct vnode *vp);
594void vdrop(struct vnode *);
595void vdropl(struct vnode *);
596int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td);
597int vget(struct vnode *vp, int lockflag, struct thread *td);
598void vgone(struct vnode *vp);
599void vhold(struct vnode *);
600void vholdl(struct vnode *);
601int vinvalbuf(struct vnode *vp, int save, int slpflag, int slptimeo);
602int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
603 off_t length, int blksize);
604void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3);
605#define vprint(label, vp) vn_printf((vp), "%s\n", (label))
606int vrecycle(struct vnode *vp, struct thread *td);
607int vn_close(struct vnode *vp,
608 int flags, struct ucred *file_cred, struct thread *td);
609void vn_finished_write(struct mount *mp);
610void vn_finished_secondary_write(struct mount *mp);
611int vn_isdisk(struct vnode *vp, int *errp);
612int _vn_lock(struct vnode *vp, int flags, char *file, int line);
613#define vn_lock(vp, flags) _vn_lock(vp, flags, __FILE__, __LINE__)
614int vn_open(struct nameidata *ndp, int *flagp, int cmode, struct file *fp);
615int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
616 struct ucred *cred, struct file *fp);
617int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
618int vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base,
619 int len, off_t offset, enum uio_seg segflg, int ioflg,
620 struct ucred *active_cred, struct ucred *file_cred, int *aresid,
621 struct thread *td);
622int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, void *base,
623 size_t len, off_t offset, enum uio_seg segflg, int ioflg,
624 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid,
625 struct thread *td);
626int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
627 struct ucred *file_cred, struct thread *td);
628int vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
629int vn_start_secondary_write(struct vnode *vp, struct mount **mpp,
630 int flags);
631int vn_writechk(struct vnode *vp);
632int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
633 const char *attrname, int *buflen, char *buf, struct thread *td);
634int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
635 const char *attrname, int buflen, char *buf, struct thread *td);
636int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
637 const char *attrname, struct thread *td);
638int vfs_cache_lookup(struct vop_lookup_args *ap);
639void vfs_timestamp(struct timespec *);
640void vfs_write_resume(struct mount *mp);
641int vfs_write_suspend(struct mount *mp);
642int vop_stdbmap(struct vop_bmap_args *);
643int vop_stdfsync(struct vop_fsync_args *);
644int vop_stdgetwritemount(struct vop_getwritemount_args *);
645int vop_stdgetpages(struct vop_getpages_args *);
646int vop_stdinactive(struct vop_inactive_args *);
647int vop_stdislocked(struct vop_islocked_args *);
648int vop_stdkqfilter(struct vop_kqfilter_args *);
649int vop_stdlock(struct vop_lock1_args *);
650int vop_stdputpages(struct vop_putpages_args *);
651int vop_stdunlock(struct vop_unlock_args *);
652int vop_nopoll(struct vop_poll_args *);
653int vop_stdadvlock(struct vop_advlock_args *ap);
654int vop_stdadvlockasync(struct vop_advlockasync_args *ap);
655int vop_stdpathconf(struct vop_pathconf_args *);
656int vop_stdpoll(struct vop_poll_args *);
657int vop_stdvptofh(struct vop_vptofh_args *ap);
658int vop_eopnotsupp(struct vop_generic_args *ap);
659int vop_ebadf(struct vop_generic_args *ap);
660int vop_einval(struct vop_generic_args *ap);
661int vop_enotty(struct vop_generic_args *ap);
662int vop_null(struct vop_generic_args *ap);
663int vop_panic(struct vop_generic_args *ap);
664
665/* These are called from within the actual VOPS. */
666void vop_create_post(void *a, int rc);
667void vop_link_post(void *a, int rc);
668void vop_lock_pre(void *a);
669void vop_lock_post(void *a, int rc);
670void vop_lookup_post(void *a, int rc);
671void vop_lookup_pre(void *a);
672void vop_mkdir_post(void *a, int rc);
673void vop_mknod_post(void *a, int rc);
674void vop_remove_post(void *a, int rc);
675void vop_rename_post(void *a, int rc);
676void vop_rename_pre(void *a);
677void vop_rmdir_post(void *a, int rc);
678void vop_setattr_post(void *a, int rc);
679void vop_strategy_pre(void *a);
680void vop_symlink_post(void *a, int rc);
681void vop_unlock_post(void *a, int rc);
682void vop_unlock_pre(void *a);
683
684#define VOP_WRITE_PRE(ap) \
685 struct vattr va; \
686 int error, osize, ooffset, noffset; \
687 \
688 osize = ooffset = noffset = 0; \
689 if (!VN_KNLIST_EMPTY((ap)->a_vp)) { \
690 error = VOP_GETATTR((ap)->a_vp, &va, (ap)->a_cred); \
691 if (error) \
692 return (error); \
693 ooffset = (ap)->a_uio->uio_offset; \
694 osize = va.va_size; \
695 }
696
697#define VOP_WRITE_POST(ap, ret) \
698 noffset = (ap)->a_uio->uio_offset; \
699 if (noffset > ooffset && !VN_KNLIST_EMPTY((ap)->a_vp)) { \
700 VFS_KNOTE_LOCKED((ap)->a_vp, NOTE_WRITE \
701 | (noffset > osize ? NOTE_EXTEND : 0)); \
702 }
703
704#define VOP_LOCK(vp, flags) VOP_LOCK1(vp, flags, __FILE__, __LINE__)
705
706
707void vput(struct vnode *vp);
708void vrele(struct vnode *vp);
709void vref(struct vnode *vp);
710int vrefcnt(struct vnode *vp);
711void v_addpollinfo(struct vnode *vp);
712
713int vnode_create_vobject(struct vnode *vp, off_t size, struct thread *td);
714void vnode_destroy_vobject(struct vnode *vp);
715
716extern struct vop_vector fifo_specops;
717extern struct vop_vector dead_vnodeops;
718extern struct vop_vector default_vnodeops;
719
720#define VOP_PANIC ((void*)(uintptr_t)vop_panic)
721#define VOP_NULL ((void*)(uintptr_t)vop_null)
722#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf)
723#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty)
724#define VOP_EINVAL ((void*)(uintptr_t)vop_einval)
725#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp)
726
727/* vfs_hash.c */
728typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg);
729
730int vfs_hash_get(const struct mount *mp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg);
731int vfs_hash_insert(struct vnode *vp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg);
732void vfs_hash_rehash(struct vnode *vp, u_int hash);
733void vfs_hash_remove(struct vnode *vp);
734
735int vfs_kqfilter(struct vop_kqfilter_args *);
736void vfs_mark_atime(struct vnode *vp, struct ucred *cred);
737struct dirent;
738int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off);
739
740#endif /* _KERNEL */
741
742#endif /* !_SYS_VNODE_H_ */
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