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 #include <sys/t_lock.h>
27 #include <sys/param.h>
28 #include <sys/systm.h>
29 #include <sys/signal.h>
30 #include <sys/cred.h>
31 #include <sys/proc.h>
32 #include <sys/disp.h>
33 #include <sys/user.h>
34 #include <sys/vfs.h>
35 #include <sys/vnode.h>
36 #include <sys/stat.h>
37 #include <sys/mode.h>
38 #include <sys/buf.h>
39 #include <sys/uio.h>
40 #include <sys/dnlc.h>
41 #include <sys/pathname.h>
42 #include <sys/fs/ufs_inode.h>
43 #include <sys/fs/ufs_fs.h>
44 #include <sys/mount.h>
45 #include <sys/fs/ufs_fsdir.h>
46 #include <sys/fs/ufs_trans.h>
47 #include <sys/fs/ufs_panic.h>
48 #include <sys/fs/ufs_quota.h>
49 #include <sys/errno.h>
50 #include <sys/debug.h>
51 #include <vm/seg.h>
52 #include <sys/sysmacros.h>
53 #include <sys/cmn_err.h>
54 #include <sys/cpuvar.h>
55 #include <sys/unistd.h>
56
57 int
ufs_xattr_getattrdir(vnode_t * dvp,struct inode ** sip,int flags,struct cred * cr)58 ufs_xattr_getattrdir(
59 vnode_t *dvp,
60 struct inode **sip,
61 int flags,
62 struct cred *cr)
63 {
64 struct vfs *vfsp;
65 struct inode *ip, *sdp;
66 int error;
67
68 ip = VTOI(dvp);
69 if (flags & LOOKUP_XATTR) {
70 if (ip && ((ip->i_oeftflag) != 0)) {
71 vfsp = dvp->v_vfsp;
72
73 error = ufs_iget(vfsp, ip->i_oeftflag, sip, cr);
74 if (error)
75 return (error);
76
77 sdp = *sip;
78
79 /*
80 * Make sure it really is an ATTRDIR
81 */
82 if ((sdp->i_mode & IFMT) != IFATTRDIR) {
83 cmn_err(CE_NOTE, "ufs_getattrdir: inode %d"
84 " points to attribute directory %d "
85 "which is not an attribute directory;"
86 "run fsck on file system",
87 (int)ip->i_number, (int)sdp->i_number);
88 VN_RELE(ITOV(sdp));
89 return (ENOENT);
90 }
91 ITOV(sdp)->v_type = VDIR;
92 ITOV(sdp)->v_flag |= V_XATTRDIR;
93 error = 0;
94 goto out;
95 } else if (flags & CREATE_XATTR_DIR) {
96 error = ufs_xattrmkdir(ip, sip, 1, cr);
97 } else {
98 error = ENOENT;
99 goto out;
100 }
101
102 } else if (flags & CREATE_XATTR_DIR) {
103 error = ufs_xattrmkdir(ip, sip, 1, cr);
104 } else {
105 error = ENOENT;
106 }
107 out:
108 return (error);
109 }
110
111
112 /*
113 * Unhook an attribute directory from a parent file/dir
114 * Only do so, if we are the only user of the vnode.
115 */
116 void
ufs_unhook_shadow(struct inode * ip,struct inode * sip)117 ufs_unhook_shadow(struct inode *ip, struct inode *sip)
118 {
119 struct vnode *datavp = ITOV(ip);
120 struct vnode *dirvp = ITOV(sip);
121 int hno;
122 kmutex_t *ihm;
123
124 ASSERT(RW_WRITE_HELD(&sip->i_contents));
125 ASSERT(RW_WRITE_HELD(&ip->i_contents));
126
127 if (vn_is_readonly(ITOV(ip)))
128 return;
129
130 if (ip->i_ufsvfs == NULL || sip->i_ufsvfs == NULL)
131 return;
132
133 hno = INOHASH(ip->i_number);
134 ihm = &ih_lock[hno];
135 mutex_enter(ihm);
136
137 mutex_enter(&datavp->v_lock);
138 mutex_enter(&dirvp->v_lock);
139
140 if (dirvp->v_count != 1 && datavp->v_count != 1) {
141 mutex_exit(&dirvp->v_lock);
142 mutex_exit(&datavp->v_lock);
143 mutex_exit(ihm);
144 return;
145 }
146
147 /*
148 * Delete shadow from ip
149 */
150
151 sip->i_nlink -= 2;
152 ufs_setreclaim(sip);
153 TRANS_INODE(sip->i_ufsvfs, sip);
154 sip->i_flag |= ICHG;
155 sip->i_seq++;
156 ITIMES_NOLOCK(sip);
157
158 /*
159 * Update src file
160 */
161 ip->i_oeftflag = 0;
162 TRANS_INODE(ip->i_ufsvfs, ip);
163 ip->i_flag |= ICHG;
164 ip->i_seq++;
165 ufs_iupdat(ip, 1);
166 mutex_exit(&dirvp->v_lock);
167 mutex_exit(&datavp->v_lock);
168 mutex_exit(ihm);
169 }
170