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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 #include <sys/types.h>
26 #include <sys/param.h>
27 #include <sys/vnode.h>
28 #include <sys/sa.h>
29 #include <sys/zfs_acl.h>
30 #include <sys/zfs_sa.h>
31
32 /*
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
37 *
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.
43 */
44
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},
66 {NULL, 0, 0, 0}
67 };
68
69 #ifdef _KERNEL
70
71 int
72 zfs_sa_readlink(znode_t *zp, uio_t *uio)
73 {
74 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
75 size_t bufsz;
76 int error;
77
78 bufsz = zp->z_size;
79 if (bufsz + ZFS_OLD_ZNODE_PHYS_SIZE <= db->db_size) {
80 error = uiomove((caddr_t)db->db_data +
81 ZFS_OLD_ZNODE_PHYS_SIZE,
82 MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
83 } else {
84 dmu_buf_t *dbp;
85 if ((error = dmu_buf_hold(zp->z_zfsvfs->z_os, zp->z_id,
86 0, FTAG, &dbp, DMU_READ_NO_PREFETCH)) == 0) {
87 error = uiomove(dbp->db_data,
88 MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
89 dmu_buf_rele(dbp, FTAG);
90 }
91 }
92 return (error);
93 }
94
95 void
96 zfs_sa_symlink(znode_t *zp, char *link, int len, dmu_tx_t *tx)
97 {
98 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
99
100 if (ZFS_OLD_ZNODE_PHYS_SIZE + len <= dmu_bonus_max()) {
101 VERIFY(dmu_set_bonus(db,
102 len + ZFS_OLD_ZNODE_PHYS_SIZE, tx) == 0);
103 if (len) {
104 bcopy(link, (caddr_t)db->db_data +
105 ZFS_OLD_ZNODE_PHYS_SIZE, len);
106 }
107 } else {
108 dmu_buf_t *dbp;
109
110 zfs_grow_blocksize(zp, len, tx);
111 VERIFY(0 == dmu_buf_hold(zp->z_zfsvfs->z_os,
112 zp->z_id, 0, FTAG, &dbp, DMU_READ_NO_PREFETCH));
113
114 dmu_buf_will_dirty(dbp, tx);
115
116 ASSERT3U(len, <=, dbp->db_size);
117 bcopy(link, dbp->db_data, len);
118 dmu_buf_rele(dbp, FTAG);
119 }
120 }
121
122 void
123 zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap)
124 {
125 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
126 xoptattr_t *xoap;
127
128 ASSERT(MUTEX_HELD(&zp->z_lock));
129 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
130 if (zp->z_is_sa) {
131 if (sa_lookup(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
132 &xoap->xoa_av_scanstamp,
133 sizeof (xoap->xoa_av_scanstamp)) != 0)
134 return;
135 } else {
136 dmu_object_info_t doi;
137 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
138 int len;
139
140 if (!(zp->z_pflags & ZFS_BONUS_SCANSTAMP))
141 return;
142
143 sa_object_info(zp->z_sa_hdl, &doi);
144 len = sizeof (xoap->xoa_av_scanstamp) +
145 ZFS_OLD_ZNODE_PHYS_SIZE;
146
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));
151 }
152 }
153 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
154 }
155
156 void
157 zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
158 {
159 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
160 xoptattr_t *xoap;
161
162 ASSERT(MUTEX_HELD(&zp->z_lock));
163 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
164 if (zp->z_is_sa)
165 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
166 &xoap->xoa_av_scanstamp,
167 sizeof (xoap->xoa_av_scanstamp), tx));
168 else {
169 dmu_object_info_t doi;
170 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
171 int len;
172
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));
180
181 zp->z_pflags |= ZFS_BONUS_SCANSTAMP;
182 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
183 &zp->z_pflags, sizeof (uint64_t), tx));
184 }
185 }
186
187 /*
188 * I'm not convinced we should do any of this upgrade.
189 * since the SA code can read both old/new znode formats
190 * with probably little to know performance difference.
191 *
192 * All new files will be created with the new format.
193 */
194
195 void
196 zfs_sa_upgrade(sa_handle_t *hdl, dmu_tx_t *tx)
197 {
198 dmu_buf_t *db = sa_get_db(hdl);
199 znode_t *zp = sa_get_userdata(hdl);
200 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
201 sa_bulk_attr_t bulk[20];
202 int count = 0;
203 sa_bulk_attr_t sa_attrs[20] = { 0 };
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 char scanstamp[AV_SCANSTAMP_SZ];
209 boolean_t drop_lock = B_FALSE;
210
211 /*
212 * No upgrade if ACL isn't cached
213 * since we won't know which locks are held
214 * and ready the ACL would require special "locked"
215 * interfaces that would be messy
216 */
217 if (zp->z_acl_cached == NULL || ZTOV(zp)->v_type == VLNK)
218 return;
219
220 /*
221 * If the z_lock is held and we aren't the owner
222 * the just return since we don't want to deadlock
223 * trying to update the status of z_is_sa. This
224 * file can then be upgraded at a later time.
225 *
226 * Otherwise, we know we are doing the
227 * sa_update() that caused us to enter this function.
228 */
229 if (mutex_owner(&zp->z_lock) != curthread) {
230 if (mutex_tryenter(&zp->z_lock) == 0)
231 return;
232 else
233 drop_lock = B_TRUE;
234 }
235
236 /* First do a bulk query of the attributes that aren't cached */
237 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
238 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
239 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16);
240 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
241 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
242 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8);
243 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8);
244 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
245 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
246 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
247 &znode_acl, 88);
248
249 if (sa_bulk_lookup_locked(hdl, bulk, count) != 0)
250 goto done;
251
252
253 /*
254 * While the order here doesn't matter its best to try and organize
255 * it is such a way to pick up an already existing layout number
256 */
257 count = 0;
258 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
259 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL,
260 &zp->z_size, 8);
261 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs),
262 NULL, &zp->z_gen, 8);
263 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
264 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
265 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs),
266 NULL, &parent, 8);
267 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL,
268 &zp->z_pflags, 8);
269 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL,
270 zp->z_atime, 16);
271 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL,
272 &mtime, 16);
273 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL,
274 &ctime, 16);
275 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL,
276 &crtime, 16);
277 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL,
278 &zp->z_links, 8);
279 if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR)
280 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL,
281 &rdev, 8);
282 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
283 &zp->z_acl_cached->z_acl_count, 8);
284
285 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID)
286 zfs_acl_xform(zp, zp->z_acl_cached, CRED());
287
288 locate.cb_aclp = zp->z_acl_cached;
289 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs),
290 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes);
291
292 if (xattr)
293 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs),
294 NULL, &xattr, 8);
295
296 /* if scanstamp then add scanstamp */
297
298 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) {
299 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
300 scanstamp, AV_SCANSTAMP_SZ);
301 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs),
302 NULL, scanstamp, AV_SCANSTAMP_SZ);
303 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP;
304 }
305
306 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0);
307 VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs,
308 count, tx) == 0);
309 if (znode_acl.z_acl_extern_obj)
310 VERIFY(0 == dmu_object_free(zfsvfs->z_os,
311 znode_acl.z_acl_extern_obj, tx));
312
313 zp->z_is_sa = B_TRUE;
314 done:
315 if (drop_lock)
316 mutex_exit(&zp->z_lock);
317 }
318
319 void
320 zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp)
321 {
322 if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa)
323 return;
324
325
326 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
327
328 if (zfs_external_acl(zp)) {
329 dmu_tx_hold_free(tx, zfs_external_acl(zp), 0,
330 DMU_OBJECT_END);
331 }
332 }
333
334 #endif