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.
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.
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]
22 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
25 #include <sys/types.h>
26 #include <sys/param.h>
27 #include <sys/vnode.h>
29 #include <sys/zfs_acl.h>
30 #include <sys/zfs_sa.h>
33 * ZPL attribute registration table.
34 * Order of attributes doesn't matter
35 * a unique value will be assigned for each
36 * attribute that is file system specific
38 * This is just the set of ZPL attributes that this
39 * version of ZFS deals with natively. The file system
40 * could have other attributes stored in files, but they will be
41 * ignored. The SA framework will preserve them, just that
42 * this version of ZFS won't change or delete them.
45 sa_attr_reg_t zfs_attr_table
[ZPL_END
+1] = {
46 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY
, 0},
47 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY
, 1},
48 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY
, 2},
49 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY
, 3},
50 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY
, 4},
51 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY
, 5},
52 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY
, 6},
53 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY
, 7},
54 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY
, 8},
55 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY
, 9},
56 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY
, 10},
57 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY
, 11},
58 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY
, 12},
59 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY
, 13},
60 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY
, 14},
61 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY
, 15},
62 {"ZPL_DACL_COUNT", sizeof (uint64_t), SA_UINT64_ARRAY
, 0},
63 {"ZPL_SYMLINK", 0, SA_UINT8_ARRAY
, 0},
64 {"ZPL_SCANSTAMP", 32, SA_UINT8_ARRAY
, 0},
65 {"ZPL_DACL_ACES", 0, SA_ACL
, 0},
71 zfs_sa_readlink(znode_t
*zp
, uio_t
*uio
)
73 dmu_buf_t
*db
= sa_get_db(zp
->z_sa_hdl
);
78 if (bufsz
+ ZFS_OLD_ZNODE_PHYS_SIZE
<= db
->db_size
) {
79 error
= uiomove((caddr_t
)db
->db_data
+
80 ZFS_OLD_ZNODE_PHYS_SIZE
,
81 MIN((size_t)bufsz
, uio
->uio_resid
), UIO_READ
, uio
);
84 if ((error
= dmu_buf_hold(ZTOZSB(zp
)->z_os
, zp
->z_id
,
85 0, FTAG
, &dbp
, DMU_READ_NO_PREFETCH
)) == 0) {
86 error
= uiomove(dbp
->db_data
,
87 MIN((size_t)bufsz
, uio
->uio_resid
), UIO_READ
, uio
);
88 dmu_buf_rele(dbp
, FTAG
);
95 zfs_sa_symlink(znode_t
*zp
, char *link
, int len
, dmu_tx_t
*tx
)
97 dmu_buf_t
*db
= sa_get_db(zp
->z_sa_hdl
);
99 if (ZFS_OLD_ZNODE_PHYS_SIZE
+ len
<= dmu_bonus_max()) {
100 VERIFY(dmu_set_bonus(db
,
101 len
+ ZFS_OLD_ZNODE_PHYS_SIZE
, tx
) == 0);
103 bcopy(link
, (caddr_t
)db
->db_data
+
104 ZFS_OLD_ZNODE_PHYS_SIZE
, len
);
109 zfs_grow_blocksize(zp
, len
, tx
);
110 VERIFY(0 == dmu_buf_hold(ZTOZSB(zp
)->z_os
,
111 zp
->z_id
, 0, FTAG
, &dbp
, DMU_READ_NO_PREFETCH
));
113 dmu_buf_will_dirty(dbp
, tx
);
115 ASSERT3U(len
, <=, dbp
->db_size
);
116 bcopy(link
, dbp
->db_data
, len
);
117 dmu_buf_rele(dbp
, FTAG
);
121 #ifdef HAVE_SCANSTAMP
123 zfs_sa_get_scanstamp(znode_t
*zp
, xvattr_t
*xvap
)
125 zfs_sb_t
*zsb
= ZTOZSB(zp
);
128 ASSERT(MUTEX_HELD(&zp
->z_lock
));
129 VERIFY((xoap
= xva_getxoptattr(xvap
)) != NULL
);
131 if (sa_lookup(zp
->z_sa_hdl
, SA_ZPL_SCANSTAMP(zsb
),
132 &xoap
->xoa_av_scanstamp
,
133 sizeof (xoap
->xoa_av_scanstamp
)) != 0)
136 dmu_object_info_t doi
;
137 dmu_buf_t
*db
= sa_get_db(zp
->z_sa_hdl
);
140 if (!(zp
->z_pflags
& ZFS_BONUS_SCANSTAMP
))
143 sa_object_info(zp
->z_sa_hdl
, &doi
);
144 len
= sizeof (xoap
->xoa_av_scanstamp
) +
145 ZFS_OLD_ZNODE_PHYS_SIZE
;
147 if (len
<= doi
.doi_bonus_size
) {
148 (void) memcpy(xoap
->xoa_av_scanstamp
,
149 (caddr_t
)db
->db_data
+ ZFS_OLD_ZNODE_PHYS_SIZE
,
150 sizeof (xoap
->xoa_av_scanstamp
));
153 XVA_SET_RTN(xvap
, XAT_AV_SCANSTAMP
);
157 zfs_sa_set_scanstamp(znode_t
*zp
, xvattr_t
*xvap
, dmu_tx_t
*tx
)
159 zfs_sb_t
*zsb
= ZTOZSB(zp
);
162 ASSERT(MUTEX_HELD(&zp
->z_lock
));
163 VERIFY((xoap
= xva_getxoptattr(xvap
)) != NULL
);
165 VERIFY(0 == sa_update(zp
->z_sa_hdl
, SA_ZPL_SCANSTAMP(zsb
),
166 &xoap
->xoa_av_scanstamp
,
167 sizeof (xoap
->xoa_av_scanstamp
), tx
));
169 dmu_object_info_t doi
;
170 dmu_buf_t
*db
= sa_get_db(zp
->z_sa_hdl
);
173 sa_object_info(zp
->z_sa_hdl
, &doi
);
174 len
= sizeof (xoap
->xoa_av_scanstamp
) +
175 ZFS_OLD_ZNODE_PHYS_SIZE
;
176 if (len
> doi
.doi_bonus_size
)
177 VERIFY(dmu_set_bonus(db
, len
, tx
) == 0);
178 (void) memcpy((caddr_t
)db
->db_data
+ ZFS_OLD_ZNODE_PHYS_SIZE
,
179 xoap
->xoa_av_scanstamp
, sizeof (xoap
->xoa_av_scanstamp
));
181 zp
->z_pflags
|= ZFS_BONUS_SCANSTAMP
;
182 VERIFY(0 == sa_update(zp
->z_sa_hdl
, SA_ZPL_FLAGS(zsb
),
183 &zp
->z_pflags
, sizeof (uint64_t), tx
));
186 #endif /* HAVE_SCANSTAMP */
189 * I'm not convinced we should do any of this upgrade.
190 * since the SA code can read both old/new znode formats
191 * with probably little to know performance difference.
193 * All new files will be created with the new format.
197 zfs_sa_upgrade(sa_handle_t
*hdl
, dmu_tx_t
*tx
)
199 dmu_buf_t
*db
= sa_get_db(hdl
);
200 znode_t
*zp
= sa_get_userdata(hdl
);
201 zfs_sb_t
*zsb
= ZTOZSB(zp
);
203 sa_bulk_attr_t
*bulk
, *sa_attrs
;
204 zfs_acl_locator_cb_t locate
= { 0 };
205 uint64_t uid
, gid
, mode
, rdev
, xattr
, parent
;
206 uint64_t crtime
[2], mtime
[2], ctime
[2];
207 zfs_acl_phys_t znode_acl
;
208 #ifdef HAVE_SCANSTAMP
209 char scanstamp
[AV_SCANSTAMP_SZ
];
210 #endif /* HAVE_SCANSTAMP */
211 boolean_t drop_lock
= B_FALSE
;
214 * No upgrade if ACL isn't cached
215 * since we won't know which locks are held
216 * and ready the ACL would require special "locked"
217 * interfaces that would be messy
219 if (zp
->z_acl_cached
== NULL
|| S_ISLNK(ZTOI(zp
)->i_mode
))
223 * If the z_lock is held and we aren't the owner
224 * the just return since we don't want to deadlock
225 * trying to update the status of z_is_sa. This
226 * file can then be upgraded at a later time.
228 * Otherwise, we know we are doing the
229 * sa_update() that caused us to enter this function.
231 if (mutex_owner(&zp
->z_lock
) != curthread
) {
232 if (mutex_tryenter(&zp
->z_lock
) == 0)
238 /* First do a bulk query of the attributes that aren't cached */
239 bulk
= kmem_alloc(sizeof(sa_bulk_attr_t
) * 20, KM_SLEEP
);
240 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zsb
), NULL
, &mtime
, 16);
241 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zsb
), NULL
, &ctime
, 16);
242 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CRTIME(zsb
), NULL
, &crtime
, 16);
243 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MODE(zsb
), NULL
, &mode
, 8);
244 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_PARENT(zsb
), NULL
, &parent
, 8);
245 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_XATTR(zsb
), NULL
, &xattr
, 8);
246 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_RDEV(zsb
), NULL
, &rdev
, 8);
247 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_UID(zsb
), NULL
, &uid
, 8);
248 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GID(zsb
), NULL
, &gid
, 8);
249 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_ZNODE_ACL(zsb
), NULL
,
252 if (sa_bulk_lookup_locked(hdl
, bulk
, count
) != 0) {
253 kmem_free(bulk
, sizeof(sa_bulk_attr_t
) * 20);
258 * While the order here doesn't matter its best to try and organize
259 * it is such a way to pick up an already existing layout number
262 sa_attrs
= kmem_zalloc(sizeof(sa_bulk_attr_t
) * 20, KM_SLEEP
);
263 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_MODE(zsb
), NULL
, &mode
, 8);
264 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_SIZE(zsb
), NULL
,
266 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_GEN(zsb
),
267 NULL
, &zp
->z_gen
, 8);
268 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_UID(zsb
), NULL
, &uid
, 8);
269 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_GID(zsb
), NULL
, &gid
, 8);
270 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_PARENT(zsb
),
272 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_FLAGS(zsb
), NULL
,
274 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_ATIME(zsb
), NULL
,
276 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_MTIME(zsb
), NULL
,
278 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_CTIME(zsb
), NULL
,
280 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_CRTIME(zsb
), NULL
,
282 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_LINKS(zsb
), NULL
,
284 if (S_ISBLK(ZTOI(zp
)->i_mode
) || S_ISCHR(ZTOI(zp
)->i_mode
))
285 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_RDEV(zsb
), NULL
,
287 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_DACL_COUNT(zsb
), NULL
,
288 &zp
->z_acl_cached
->z_acl_count
, 8);
290 if (zp
->z_acl_cached
->z_version
< ZFS_ACL_VERSION_FUID
)
291 zfs_acl_xform(zp
, zp
->z_acl_cached
, CRED());
293 locate
.cb_aclp
= zp
->z_acl_cached
;
294 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_DACL_ACES(zsb
),
295 zfs_acl_data_locator
, &locate
, zp
->z_acl_cached
->z_acl_bytes
);
298 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_XATTR(zsb
),
301 #ifdef HAVE_SCANSTAMP
302 /* if scanstamp then add scanstamp */
304 if (zp
->z_pflags
& ZFS_BONUS_SCANSTAMP
) {
305 bcopy((caddr_t
)db
->db_data
+ ZFS_OLD_ZNODE_PHYS_SIZE
,
306 scanstamp
, AV_SCANSTAMP_SZ
);
307 SA_ADD_BULK_ATTR(sa_attrs
, count
, SA_ZPL_SCANSTAMP(zsb
),
308 NULL
, scanstamp
, AV_SCANSTAMP_SZ
);
309 zp
->z_pflags
&= ~ZFS_BONUS_SCANSTAMP
;
311 #endif /* HAVE_SCANSTAMP */
313 VERIFY(dmu_set_bonustype(db
, DMU_OT_SA
, tx
) == 0);
314 VERIFY(sa_replace_all_by_template_locked(hdl
, sa_attrs
,
316 if (znode_acl
.z_acl_extern_obj
)
317 VERIFY(0 == dmu_object_free(zsb
->z_os
,
318 znode_acl
.z_acl_extern_obj
, tx
));
320 zp
->z_is_sa
= B_TRUE
;
321 kmem_free(sa_attrs
, sizeof(sa_bulk_attr_t
) * 20);
322 kmem_free(bulk
, sizeof(sa_bulk_attr_t
) * 20);
325 mutex_exit(&zp
->z_lock
);
329 zfs_sa_upgrade_txholds(dmu_tx_t
*tx
, znode_t
*zp
)
331 if (!ZTOZSB(zp
)->z_use_sa
|| zp
->z_is_sa
)
335 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_TRUE
);
337 if (zfs_external_acl(zp
)) {
338 dmu_tx_hold_free(tx
, zfs_external_acl(zp
), 0,