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/zfs_context.h>
26 #include <sys/types.h>
27 #include <sys/param.h>
28 #include <sys/vnode.h>
29 #include <sys/sa.h>
30 #include <sys/zfs_acl.h>
31 #include <sys/zfs_sa.h>
32
33 /*
34 * ZPL attribute registration table.
35 * Order of attributes doesn't matter
36 * a unique value will be assigned for each
37 * attribute that is file system specific
38 *
39 * This is just the set of ZPL attributes that this
40 * version of ZFS deals with natively. The file system
41 * could have other attributes stored in files, but they will be
42 * ignored. The SA framework will preserve them, just that
43 * this version of ZFS won't change or delete them.
44 */
45
46 sa_attr_reg_t zfs_attr_table[ZPL_END+1] = {
47 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0},
48 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1},
49 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2},
50 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3},
51 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4},
52 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5},
53 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6},
54 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7},
55 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8},
56 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9},
57 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10},
58 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11},
59 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12},
60 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13},
61 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14},
62 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15},
63 {"ZPL_DACL_COUNT", sizeof (uint64_t), SA_UINT64_ARRAY, 0},
64 {"ZPL_SYMLINK", 0, SA_UINT8_ARRAY, 0},
65 {"ZPL_SCANSTAMP", 32, SA_UINT8_ARRAY, 0},
66 {"ZPL_DACL_ACES", 0, SA_ACL, 0},
67 {NULL, 0, 0, 0}
68 };
69
70 #ifdef _KERNEL
71
72 int
73 zfs_sa_readlink(znode_t *zp, uio_t *uio)
74 {
75 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
76 size_t bufsz;
77 int error;
78
79 bufsz = zp->z_size;
80 if (bufsz + ZFS_OLD_ZNODE_PHYS_SIZE <= db->db_size) {
81 error = uiomove((caddr_t)db->db_data +
82 ZFS_OLD_ZNODE_PHYS_SIZE,
83 MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
84 } else {
85 dmu_buf_t *dbp;
86 if ((error = dmu_buf_hold(zp->z_zfsvfs->z_os, zp->z_id,
87 0, FTAG, &dbp, DMU_READ_NO_PREFETCH)) == 0) {
88 error = uiomove(dbp->db_data,
89 MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
90 dmu_buf_rele(dbp, FTAG);
91 }
92 }
93 return (error);
94 }
95
96 void
97 zfs_sa_symlink(znode_t *zp, char *link, int len, dmu_tx_t *tx)
98 {
99 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
100
101 if (ZFS_OLD_ZNODE_PHYS_SIZE + len <= dmu_bonus_max()) {
102 VERIFY(dmu_set_bonus(db,
103 len + ZFS_OLD_ZNODE_PHYS_SIZE, tx) == 0);
104 if (len) {
105 bcopy(link, (caddr_t)db->db_data +
106 ZFS_OLD_ZNODE_PHYS_SIZE, len);
107 }
108 } else {
109 dmu_buf_t *dbp;
110
111 zfs_grow_blocksize(zp, len, tx);
112 VERIFY(0 == dmu_buf_hold(zp->z_zfsvfs->z_os,
113 zp->z_id, 0, FTAG, &dbp, DMU_READ_NO_PREFETCH));
114
115 dmu_buf_will_dirty(dbp, tx);
116
117 ASSERT3U(len, <=, dbp->db_size);
118 bcopy(link, dbp->db_data, len);
119 dmu_buf_rele(dbp, FTAG);
120 }
121 }
122
123 void
124 zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap)
125 {
126 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
127 xoptattr_t *xoap;
128
129 ASSERT(MUTEX_HELD(&zp->z_lock));
130 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
131 if (zp->z_is_sa) {
132 if (sa_lookup(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
133 &xoap->xoa_av_scanstamp,
134 sizeof (xoap->xoa_av_scanstamp)) != 0)
135 return;
136 } else {
137 dmu_object_info_t doi;
138 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
139 int len;
140
141 if (!(zp->z_pflags & ZFS_BONUS_SCANSTAMP))
142 return;
143
144 sa_object_info(zp->z_sa_hdl, &doi);
145 len = sizeof (xoap->xoa_av_scanstamp) +
146 ZFS_OLD_ZNODE_PHYS_SIZE;
147
148 if (len <= doi.doi_bonus_size) {
149 (void) memcpy(xoap->xoa_av_scanstamp,
150 (caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
151 sizeof (xoap->xoa_av_scanstamp));
152 }
153 }
154 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
155 }
156
157 void
158 zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
159 {
160 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
161 xoptattr_t *xoap;
162
163 ASSERT(MUTEX_HELD(&zp->z_lock));
164 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
165 if (zp->z_is_sa)
166 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
167 &xoap->xoa_av_scanstamp,
168 sizeof (xoap->xoa_av_scanstamp), tx));
169 else {
170 dmu_object_info_t doi;
171 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
172 int len;
173
174 sa_object_info(zp->z_sa_hdl, &doi);
175 len = sizeof (xoap->xoa_av_scanstamp) +
176 ZFS_OLD_ZNODE_PHYS_SIZE;
177 if (len > doi.doi_bonus_size)
178 VERIFY(dmu_set_bonus(db, len, tx) == 0);
179 (void) memcpy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
180 xoap->xoa_av_scanstamp, sizeof (xoap->xoa_av_scanstamp));
181
182 zp->z_pflags |= ZFS_BONUS_SCANSTAMP;
183 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
184 &zp->z_pflags, sizeof (uint64_t), tx));
185 }
186 }
187
188 /*
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.
192 *
193 * All new files will be created with the new format.
194 */
195
196 void
197 zfs_sa_upgrade(sa_handle_t *hdl, dmu_tx_t *tx)
198 {
199 dmu_buf_t *db = sa_get_db(hdl);
200 znode_t *zp = sa_get_userdata(hdl);
201 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
202 sa_bulk_attr_t bulk[20];
203 int count = 0;
204 sa_bulk_attr_t sa_attrs[20] = { 0 };
205 zfs_acl_locator_cb_t locate = { 0 };
206 uint64_t uid, gid, mode, rdev, xattr, parent;
207 uint64_t crtime[2], mtime[2], ctime[2];
208 zfs_acl_phys_t znode_acl;
209 char scanstamp[AV_SCANSTAMP_SZ];
210 boolean_t drop_lock = B_FALSE;
211
212 /*
213 * No upgrade if ACL isn't cached
214 * since we won't know which locks are held
215 * and ready the ACL would require special "locked"
216 * interfaces that would be messy
217 */
218 if (zp->z_acl_cached == NULL || ZTOV(zp)->v_type == VLNK)
219 return;
220
221 /*
222 * If the z_lock is held and we aren't the owner
223 * the just return since we don't want to deadlock
224 * trying to update the status of z_is_sa. This
225 * file can then be upgraded at a later time.
226 *
227 * Otherwise, we know we are doing the
228 * sa_update() that caused us to enter this function.
229 */
230 if (mutex_owner(&zp->z_lock) != curthread) {
231 if (mutex_tryenter(&zp->z_lock) == 0)
232 return;
233 else
234 drop_lock = B_TRUE;
235 }
236
237 /* First do a bulk query of the attributes that aren't cached */
238 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
239 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
240 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16);
241 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
242 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
243 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8);
244 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8);
245 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
246 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
247 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
248 &znode_acl, 88);
249
250 if (sa_bulk_lookup_locked(hdl, bulk, count) != 0)
251 goto done;
252
253
254 /*
255 * While the order here doesn't matter its best to try and organize
256 * it is such a way to pick up an already existing layout number
257 */
258 count = 0;
259 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
260 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL,
261 &zp->z_size, 8);
262 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs),
263 NULL, &zp->z_gen, 8);
264 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
265 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
266 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs),
267 NULL, &parent, 8);
268 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL,
269 &zp->z_pflags, 8);
270 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL,
271 zp->z_atime, 16);
272 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL,
273 &mtime, 16);
274 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL,
275 &ctime, 16);
276 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL,
277 &crtime, 16);
278 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL,
279 &zp->z_links, 8);
280 if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR)
281 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL,
282 &rdev, 8);
283 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
284 &zp->z_acl_cached->z_acl_count, 8);
285
286 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID)
287 zfs_acl_xform(zp, zp->z_acl_cached, CRED());
288
289 locate.cb_aclp = zp->z_acl_cached;
290 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs),
291 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes);
292
293 if (xattr)
294 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs),
295 NULL, &xattr, 8);
296
297 /* if scanstamp then add scanstamp */
298
299 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) {
300 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
301 scanstamp, AV_SCANSTAMP_SZ);
302 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs),
303 NULL, scanstamp, AV_SCANSTAMP_SZ);
304 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP;
305 }
306
307 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0);
308 VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs,
309 count, tx) == 0);
310 if (znode_acl.z_acl_extern_obj)
311 VERIFY(0 == dmu_object_free(zfsvfs->z_os,
312 znode_acl.z_acl_extern_obj, tx));
313
314 zp->z_is_sa = B_TRUE;
315 done:
316 if (drop_lock)
317 mutex_exit(&zp->z_lock);
318 }
319
320 void
321 zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp)
322 {
323 if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa)
324 return;
325
326
327 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
328
329 if (zfs_external_acl(zp)) {
330 dmu_tx_hold_free(tx, zfs_external_acl(zp), 0,
331 DMU_OBJECT_END);
332 }
333 }
334
335 #endif