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 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <sys/zfs_context.h>
27 #include <sys/vfs.h>
28 #include <sys/fs/zfs.h>
29 #include <sys/zfs_znode.h>
30 #include <sys/zfs_sa.h>
31 #include <sys/zfs_acl.h>
32
33 void
zfs_oldace_byteswap(ace_t * ace,int ace_cnt)34 zfs_oldace_byteswap(ace_t *ace, int ace_cnt)
35 {
36 int i;
37
38 for (i = 0; i != ace_cnt; i++, ace++) {
39 ace->a_who = BSWAP_32(ace->a_who);
40 ace->a_access_mask = BSWAP_32(ace->a_access_mask);
41 ace->a_flags = BSWAP_16(ace->a_flags);
42 ace->a_type = BSWAP_16(ace->a_type);
43 }
44 }
45
46 /*
47 * swap ace_t and ace_oject_t
48 */
49 void
zfs_ace_byteswap(void * buf,size_t size,boolean_t zfs_layout)50 zfs_ace_byteswap(void *buf, size_t size, boolean_t zfs_layout)
51 {
52 caddr_t end;
53 caddr_t ptr;
54 zfs_ace_t *zacep = NULL;
55 ace_t *acep;
56 uint16_t entry_type;
57 size_t entry_size;
58 int ace_type;
59
60 end = (caddr_t)buf + size;
61 ptr = buf;
62
63 while (ptr < end) {
64 if (zfs_layout) {
65 /*
66 * Avoid overrun. Embedded aces can have one
67 * of several sizes. We don't know exactly
68 * how many our present, only the size of the
69 * buffer containing them. That size may be
70 * larger than needed to hold the aces
71 * present. As long as we do not do any
72 * swapping beyond the end of our block we are
73 * okay. It it safe to swap any non-ace data
74 * within the block since it is just zeros.
75 */
76 if (ptr + sizeof (zfs_ace_hdr_t) > end) {
77 break;
78 }
79 zacep = (zfs_ace_t *)ptr;
80 zacep->z_hdr.z_access_mask =
81 BSWAP_32(zacep->z_hdr.z_access_mask);
82 zacep->z_hdr.z_flags = BSWAP_16(zacep->z_hdr.z_flags);
83 ace_type = zacep->z_hdr.z_type =
84 BSWAP_16(zacep->z_hdr.z_type);
85 entry_type = zacep->z_hdr.z_flags & ACE_TYPE_FLAGS;
86 } else {
87 /* Overrun avoidance */
88 if (ptr + sizeof (ace_t) > end) {
89 break;
90 }
91 acep = (ace_t *)ptr;
92 acep->a_access_mask = BSWAP_32(acep->a_access_mask);
93 acep->a_flags = BSWAP_16(acep->a_flags);
94 ace_type = acep->a_type = BSWAP_16(acep->a_type);
95 acep->a_who = BSWAP_32(acep->a_who);
96 entry_type = acep->a_flags & ACE_TYPE_FLAGS;
97 }
98 switch (entry_type) {
99 case ACE_OWNER:
100 case ACE_EVERYONE:
101 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
102 entry_size = zfs_layout ?
103 sizeof (zfs_ace_hdr_t) : sizeof (ace_t);
104 break;
105 case ACE_IDENTIFIER_GROUP:
106 default:
107 /* Overrun avoidance */
108 if (zfs_layout) {
109 if (ptr + sizeof (zfs_ace_t) <= end) {
110 zacep->z_fuid = BSWAP_64(zacep->z_fuid);
111 } else {
112 entry_size = sizeof (zfs_ace_t);
113 break;
114 }
115 }
116 switch (ace_type) {
117 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
118 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
119 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
120 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
121 entry_size = zfs_layout ?
122 sizeof (zfs_object_ace_t) :
123 sizeof (ace_object_t);
124 break;
125 default:
126 entry_size = zfs_layout ? sizeof (zfs_ace_t) :
127 sizeof (ace_t);
128 break;
129 }
130 }
131 ptr = ptr + entry_size;
132 }
133 }
134
135 /* ARGSUSED */
136 void
zfs_oldacl_byteswap(void * buf,size_t size)137 zfs_oldacl_byteswap(void *buf, size_t size)
138 {
139 int cnt;
140
141 /*
142 * Arggh, since we don't know how many ACEs are in
143 * the array, we have to swap the entire block
144 */
145
146 cnt = size / sizeof (ace_t);
147
148 zfs_oldace_byteswap((ace_t *)buf, cnt);
149 }
150
151 /* ARGSUSED */
152 void
zfs_acl_byteswap(void * buf,size_t size)153 zfs_acl_byteswap(void *buf, size_t size)
154 {
155 zfs_ace_byteswap(buf, size, B_TRUE);
156 }
157
158 void
zfs_znode_byteswap(void * buf,size_t size)159 zfs_znode_byteswap(void *buf, size_t size)
160 {
161 znode_phys_t *zp = buf;
162
163 ASSERT(size >= sizeof (znode_phys_t));
164
165 zp->zp_crtime[0] = BSWAP_64(zp->zp_crtime[0]);
166 zp->zp_crtime[1] = BSWAP_64(zp->zp_crtime[1]);
167 zp->zp_atime[0] = BSWAP_64(zp->zp_atime[0]);
168 zp->zp_atime[1] = BSWAP_64(zp->zp_atime[1]);
169 zp->zp_mtime[0] = BSWAP_64(zp->zp_mtime[0]);
170 zp->zp_mtime[1] = BSWAP_64(zp->zp_mtime[1]);
171 zp->zp_ctime[0] = BSWAP_64(zp->zp_ctime[0]);
172 zp->zp_ctime[1] = BSWAP_64(zp->zp_ctime[1]);
173 zp->zp_gen = BSWAP_64(zp->zp_gen);
174 zp->zp_mode = BSWAP_64(zp->zp_mode);
175 zp->zp_size = BSWAP_64(zp->zp_size);
176 zp->zp_parent = BSWAP_64(zp->zp_parent);
177 zp->zp_links = BSWAP_64(zp->zp_links);
178 zp->zp_xattr = BSWAP_64(zp->zp_xattr);
179 zp->zp_rdev = BSWAP_64(zp->zp_rdev);
180 zp->zp_flags = BSWAP_64(zp->zp_flags);
181 zp->zp_uid = BSWAP_64(zp->zp_uid);
182 zp->zp_gid = BSWAP_64(zp->zp_gid);
183 zp->zp_zap = BSWAP_64(zp->zp_zap);
184 zp->zp_pad[0] = BSWAP_64(zp->zp_pad[0]);
185 zp->zp_pad[1] = BSWAP_64(zp->zp_pad[1]);
186 zp->zp_pad[2] = BSWAP_64(zp->zp_pad[2]);
187
188 zp->zp_acl.z_acl_extern_obj = BSWAP_64(zp->zp_acl.z_acl_extern_obj);
189 zp->zp_acl.z_acl_size = BSWAP_32(zp->zp_acl.z_acl_size);
190 zp->zp_acl.z_acl_version = BSWAP_16(zp->zp_acl.z_acl_version);
191 zp->zp_acl.z_acl_count = BSWAP_16(zp->zp_acl.z_acl_count);
192 if (zp->zp_acl.z_acl_version == ZFS_ACL_VERSION) {
193 zfs_acl_byteswap((void *)&zp->zp_acl.z_ace_data[0],
194 ZFS_ACE_SPACE);
195 } else {
196 zfs_oldace_byteswap((ace_t *)&zp->zp_acl.z_ace_data[0],
197 ACE_SLOT_CNT);
198 }
199 }
200