1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #pragma ident "%Z%%M% %I% %E% SMI"
27
28 #include <sys/t_lock.h>
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/signal.h>
32 #include <sys/cred.h>
33 #include <sys/proc.h>
34 #include <sys/disp.h>
35 #include <sys/user.h>
36 #include <sys/vfs.h>
37 #include <sys/vnode.h>
38 #include <sys/stat.h>
39 #include <sys/mode.h>
40 #include <sys/buf.h>
41 #include <sys/uio.h>
42 #include <sys/dnlc.h>
43 #include <sys/pathname.h>
44 #include <sys/fs/ufs_inode.h>
45 #include <sys/fs/ufs_fs.h>
46 #include <sys/mount.h>
47 #include <sys/fs/ufs_fsdir.h>
48 #include <sys/fs/ufs_trans.h>
49 #include <sys/fs/ufs_panic.h>
50 #include <sys/fs/ufs_quota.h>
51 #include <sys/errno.h>
52 #include <sys/debug.h>
53 #include <vm/seg.h>
54 #include <sys/sysmacros.h>
55 #include <sys/cmn_err.h>
56 #include <sys/cpuvar.h>
57 #include <sys/unistd.h>
58
59 int
ufs_xattr_getattrdir(vnode_t * dvp,struct inode ** sip,int flags,struct cred * cr)60 ufs_xattr_getattrdir(
61 vnode_t *dvp,
62 struct inode **sip,
63 int flags,
64 struct cred *cr)
65 {
66 struct vfs *vfsp;
67 struct inode *ip, *sdp;
68 int error;
69
70 ip = VTOI(dvp);
71 if (flags & LOOKUP_XATTR) {
72 if (ip && ((ip->i_oeftflag) != 0)) {
73 vfsp = dvp->v_vfsp;
74
75 error = ufs_iget(vfsp, ip->i_oeftflag, sip, cr);
76 if (error)
77 return (error);
78
79 sdp = *sip;
80
81 /*
82 * Make sure it really is an ATTRDIR
83 */
84 if ((sdp->i_mode & IFMT) != IFATTRDIR) {
85 cmn_err(CE_NOTE, "ufs_getattrdir: inode %d"
86 " points to attribute directory %d "
87 "which is not an attribute directory;"
88 "run fsck on file system",
89 (int)ip->i_number, (int)sdp->i_number);
90 VN_RELE(ITOV(sdp));
91 return (ENOENT);
92 }
93 ITOV(sdp)->v_type = VDIR;
94 ITOV(sdp)->v_flag |= V_XATTRDIR;
95 error = 0;
96 goto out;
97 } else if (flags & CREATE_XATTR_DIR) {
98 error = ufs_xattrmkdir(ip, sip, 1, cr);
99 } else {
100 error = ENOENT;
101 goto out;
102 }
103
104 } else if (flags & CREATE_XATTR_DIR) {
105 error = ufs_xattrmkdir(ip, sip, 1, cr);
106 } else {
107 error = ENOENT;
108 }
109 out:
110 return (error);
111 }
112
113
114 /*
115 * Unhook an attribute directory from a parent file/dir
116 * Only do so, if we are the only user of the vnode.
117 */
118 void
ufs_unhook_shadow(struct inode * ip,struct inode * sip)119 ufs_unhook_shadow(struct inode *ip, struct inode *sip)
120 {
121 struct vnode *datavp = ITOV(ip);
122 struct vnode *dirvp = ITOV(sip);
123 int hno;
124 kmutex_t *ihm;
125
126 ASSERT(RW_WRITE_HELD(&sip->i_contents));
127 ASSERT(RW_WRITE_HELD(&ip->i_contents));
128
129 if (vn_is_readonly(ITOV(ip)))
130 return;
131
132 if (ip->i_ufsvfs == NULL || sip->i_ufsvfs == NULL)
133 return;
134
135 hno = INOHASH(ip->i_number);
136 ihm = &ih_lock[hno];
137 mutex_enter(ihm);
138
139 mutex_enter(&datavp->v_lock);
140 mutex_enter(&dirvp->v_lock);
141
142 if (dirvp->v_count != 1 && datavp->v_count != 1) {
143 mutex_exit(&dirvp->v_lock);
144 mutex_exit(&datavp->v_lock);
145 mutex_exit(ihm);
146 return;
147 }
148
149 /*
150 * Delete shadow from ip
151 */
152
153 sip->i_nlink -= 2;
154 ufs_setreclaim(sip);
155 TRANS_INODE(sip->i_ufsvfs, sip);
156 sip->i_flag |= ICHG;
157 sip->i_seq++;
158 ITIMES_NOLOCK(sip);
159
160 /*
161 * Update src file
162 */
163 ip->i_oeftflag = 0;
164 TRANS_INODE(ip->i_ufsvfs, ip);
165 ip->i_flag |= ICHG;
166 ip->i_seq++;
167 ufs_iupdat(ip, 1);
168 mutex_exit(&dirvp->v_lock);
169 mutex_exit(&datavp->v_lock);
170 mutex_exit(ihm);
171 }
172