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/vnode.h>
27 #include <sys/sa.h>
28 #include <sys/zfs_acl.h>
29 #include <sys/zfs_sa.h>
30
31 /*
32 * ZPL attribute registration table.
33 * Order of attributes doesn't matter
34 * a unique value will be assigned for each
35 * attribute that is file system specific
36 *
37 * This is just the set of ZPL attributes that this
38 * version of ZFS deals with natively. The file system
39 * could have other attributes stored in files, but they will be
40 * ignored. The SA framework will preserve them, just that
41 * this version of ZFS won't change or delete them.
42 */
43
44 sa_attr_reg_t zfs_attr_table[ZPL_END+1] = {
45 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0},
46 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1},
47 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2},
48 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3},
49 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4},
50 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5},
51 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6},
52 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7},
53 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8},
54 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9},
55 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10},
56 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11},
57 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12},
58 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13},
59 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14},
60 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15},
61 {"ZPL_DACL_COUNT", sizeof (uint64_t), SA_UINT64_ARRAY, 0},
62 {"ZPL_SYMLINK", 0, SA_UINT8_ARRAY, 0},
63 {"ZPL_SCANSTAMP", 32, SA_UINT8_ARRAY, 0},
64 {"ZPL_DACL_ACES", 0, SA_ACL, 0},
65 {NULL, 0, 0, 0}
66 };
67
68 #ifdef _KERNEL
69
70 int
zfs_sa_readlink(znode_t * zp,uio_t * uio)71 zfs_sa_readlink(znode_t *zp, uio_t *uio)
72 {
73 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
74 size_t bufsz;
75 int error;
76
77 bufsz = zp->z_size;
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);
82 } else {
83 dmu_buf_t *dbp;
84 if ((error = dmu_buf_hold(zp->z_zfsvfs->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);
89 }
90 }
91 return (error);
92 }
93
94 void
zfs_sa_symlink(znode_t * zp,char * link,int len,dmu_tx_t * tx)95 zfs_sa_symlink(znode_t *zp, char *link, int len, dmu_tx_t *tx)
96 {
97 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
98
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);
102 if (len) {
103 bcopy(link, (caddr_t)db->db_data +
104 ZFS_OLD_ZNODE_PHYS_SIZE, len);
105 }
106 } else {
107 dmu_buf_t *dbp;
108
109 zfs_grow_blocksize(zp, len, tx);
110 VERIFY(0 == dmu_buf_hold(zp->z_zfsvfs->z_os,
111 zp->z_id, 0, FTAG, &dbp, DMU_READ_NO_PREFETCH));
112
113 dmu_buf_will_dirty(dbp, tx);
114
115 ASSERT3U(len, <=, dbp->db_size);
116 bcopy(link, dbp->db_data, len);
117 dmu_buf_rele(dbp, FTAG);
118 }
119 }
120
121 void
zfs_sa_get_scanstamp(znode_t * zp,xvattr_t * xvap)122 zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap)
123 {
124 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
125 xoptattr_t *xoap;
126
127 ASSERT_VOP_LOCKED(ZTOV(zp), __func__);
128 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
129 if (zp->z_is_sa) {
130 if (sa_lookup(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
131 &xoap->xoa_av_scanstamp,
132 sizeof (xoap->xoa_av_scanstamp)) != 0)
133 return;
134 } else {
135 dmu_object_info_t doi;
136 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
137 int len;
138
139 if (!(zp->z_pflags & ZFS_BONUS_SCANSTAMP))
140 return;
141
142 sa_object_info(zp->z_sa_hdl, &doi);
143 len = sizeof (xoap->xoa_av_scanstamp) +
144 ZFS_OLD_ZNODE_PHYS_SIZE;
145
146 if (len <= doi.doi_bonus_size) {
147 (void) memcpy(xoap->xoa_av_scanstamp,
148 (caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
149 sizeof (xoap->xoa_av_scanstamp));
150 }
151 }
152 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
153 }
154
155 void
zfs_sa_set_scanstamp(znode_t * zp,xvattr_t * xvap,dmu_tx_t * tx)156 zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
157 {
158 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
159 xoptattr_t *xoap;
160
161 ASSERT_VOP_ELOCKED(ZTOV(zp), __func__);
162 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
163 if (zp->z_is_sa)
164 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
165 &xoap->xoa_av_scanstamp,
166 sizeof (xoap->xoa_av_scanstamp), tx));
167 else {
168 dmu_object_info_t doi;
169 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
170 int len;
171
172 sa_object_info(zp->z_sa_hdl, &doi);
173 len = sizeof (xoap->xoa_av_scanstamp) +
174 ZFS_OLD_ZNODE_PHYS_SIZE;
175 if (len > doi.doi_bonus_size)
176 VERIFY(dmu_set_bonus(db, len, tx) == 0);
177 (void) memcpy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
178 xoap->xoa_av_scanstamp, sizeof (xoap->xoa_av_scanstamp));
179
180 zp->z_pflags |= ZFS_BONUS_SCANSTAMP;
181 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
182 &zp->z_pflags, sizeof (uint64_t), tx));
183 }
184 }
185
186 /*
187 * I'm not convinced we should do any of this upgrade.
188 * since the SA code can read both old/new znode formats
189 * with probably little to no performance difference.
190 *
191 * All new files will be created with the new format.
192 */
193
194 void
zfs_sa_upgrade(sa_handle_t * hdl,dmu_tx_t * tx)195 zfs_sa_upgrade(sa_handle_t *hdl, dmu_tx_t *tx)
196 {
197 dmu_buf_t *db = sa_get_db(hdl);
198 znode_t *zp = sa_get_userdata(hdl);
199 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
200 sa_bulk_attr_t bulk[20];
201 int count = 0;
202 sa_bulk_attr_t sa_attrs[20] = { 0 };
203 zfs_acl_locator_cb_t locate = { 0 };
204 uint64_t uid, gid, mode, rdev, xattr, parent;
205 uint64_t crtime[2], mtime[2], ctime[2];
206 zfs_acl_phys_t znode_acl;
207 char scanstamp[AV_SCANSTAMP_SZ];
208
209 /*
210 * No upgrade if ACL isn't cached
211 * since we won't know which locks are held
212 * and ready the ACL would require special "locked"
213 * interfaces that would be messy
214 */
215 if (zp->z_acl_cached == NULL || ZTOV(zp)->v_type == VLNK)
216 return;
217
218 /*
219 * If the vnode lock is held and we aren't the owner
220 * then just return since we don't want to deadlock
221 * trying to update the status of z_is_sa. This
222 * file can then be upgraded at a later time.
223 *
224 * Otherwise, we know we are doing the
225 * sa_update() that caused us to enter this function.
226 */
227 if (vn_lock(ZTOV(zp), LK_EXCLUSIVE | LK_NOWAIT) != 0)
228 return;
229
230 /* First do a bulk query of the attributes that aren't cached */
231 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
232 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
233 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16);
234 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
235 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
236 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8);
237 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8);
238 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
239 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
240 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
241 &znode_acl, 88);
242
243 if (sa_bulk_lookup_locked(hdl, bulk, count) != 0)
244 goto done;
245
246
247 /*
248 * While the order here doesn't matter its best to try and organize
249 * it is such a way to pick up an already existing layout number
250 */
251 count = 0;
252 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
253 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL,
254 &zp->z_size, 8);
255 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs),
256 NULL, &zp->z_gen, 8);
257 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
258 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
259 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs),
260 NULL, &parent, 8);
261 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL,
262 &zp->z_pflags, 8);
263 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL,
264 zp->z_atime, 16);
265 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL,
266 &mtime, 16);
267 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL,
268 &ctime, 16);
269 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL,
270 &crtime, 16);
271 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL,
272 &zp->z_links, 8);
273 if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR)
274 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL,
275 &rdev, 8);
276 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
277 &zp->z_acl_cached->z_acl_count, 8);
278
279 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID)
280 zfs_acl_xform(zp, zp->z_acl_cached, CRED());
281
282 locate.cb_aclp = zp->z_acl_cached;
283 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs),
284 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes);
285
286 if (xattr)
287 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs),
288 NULL, &xattr, 8);
289
290 /* if scanstamp then add scanstamp */
291
292 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) {
293 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
294 scanstamp, AV_SCANSTAMP_SZ);
295 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs),
296 NULL, scanstamp, AV_SCANSTAMP_SZ);
297 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP;
298 }
299
300 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0);
301 VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs,
302 count, tx) == 0);
303 if (znode_acl.z_acl_extern_obj)
304 VERIFY(0 == dmu_object_free(zfsvfs->z_os,
305 znode_acl.z_acl_extern_obj, tx));
306
307 zp->z_is_sa = B_TRUE;
308 done:
309 VOP_UNLOCK(ZTOV(zp), 0);
310 }
311
312 void
zfs_sa_upgrade_txholds(dmu_tx_t * tx,znode_t * zp)313 zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp)
314 {
315 if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa)
316 return;
317
318
319 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
320
321 if (zfs_external_acl(zp)) {
322 dmu_tx_hold_free(tx, zfs_external_acl(zp), 0,
323 DMU_OBJECT_END);
324 }
325 }
326
327 #endif
328