3 .\" Copyright (c) 1996 Doug Rabson
5 .\" All rights reserved.
7 .\" This program is free software.
9 .\" Redistribution and use in source and binary forms, with or without
10 .\" modification, are permitted provided that the following conditions
12 .\" 1. Redistributions of source code must retain the above copyright
13 .\" notice, this list of conditions and the following disclaimer.
14 .\" 2. Redistributions in binary form must reproduce the above copyright
15 .\" notice, this list of conditions and the following disclaimer in the
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18 .\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
19 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 .\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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25 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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29 .\" $Id: VOP_LINK.9,v 1.5 1999/02/13 07:44:14 dillon Exp $
36 .Nd create a new name for a file
38 .Fd #include <sys/param.h>
39 .Fd #include <sys/vnode.h>
41 .Fn VOP_LINK "struct vnode *dvp" "struct vnode *vp" "struct componentname *cnp"
43 This links a new name in the specified directory to an existing file.
48 the vnode of the directory
50 the vnode of the file to be linked
52 pathname information about the file
55 The pathname info must be released on exit. The directory and
56 file vnodes should NOT be released on exit.
60 is locked on entry. The caller will unlock and release the directory
61 on return. The VOP routine should not try to unlock or release
65 is not locked on entry. If the VOP routine locks it, it must remember
66 to unlock it prior to returning.
68 Zero is returned if the file was linked successfully, otherwise an
73 vop_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
77 if (vp->v_mount != dvp->v_mount) {
78 VOP_ABORTOP(dvp, cnp);
82 if (vp != dvp && (error = VOP_LOCK(vp))) {
83 VOP_ABORTOP(dvp, cnp);
88 * now that we've locked vp, we have to use out1 instead of out2
91 if (vp would have too many links) {
92 VOP_ABORTOP(dvp, cnp);
97 if (vp is immutable) {
98 VOP_ABORTOP(dvp, cnp);
104 * Increment link count of vp and write back the on-disc version of it.
110 * Add the new name to the directory.
115 free(cnp->cn_pnbuf, M_NAMEI);
127 the file is immutable
132 This man page was written by