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.
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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/zfs_context.h>
26 #include <sys/vnode.h>
28 #include <sys/zfs_acl.h>
29 #include <sys/zfs_sa.h>
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
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.
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},
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(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);
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 VERIFY0(dmu_set_bonus(db, len + ZFS_OLD_ZNODE_PHYS_SIZE, tx));
102 bcopy(link, (caddr_t)db->db_data +
103 ZFS_OLD_ZNODE_PHYS_SIZE, len);
108 zfs_grow_blocksize(zp, len, tx);
109 VERIFY(0 == dmu_buf_hold(zp->z_zfsvfs->z_os,
110 zp->z_id, 0, FTAG, &dbp, DMU_READ_NO_PREFETCH));
112 dmu_buf_will_dirty(dbp, tx);
114 ASSERT3U(len, <=, dbp->db_size);
115 bcopy(link, dbp->db_data, len);
116 dmu_buf_rele(dbp, FTAG);
121 zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap)
123 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
126 ASSERT_VOP_LOCKED(ZTOV(zp), __func__);
127 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
129 if (sa_lookup(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
130 &xoap->xoa_av_scanstamp,
131 sizeof (xoap->xoa_av_scanstamp)) != 0)
134 dmu_object_info_t doi;
135 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
138 if (!(zp->z_pflags & ZFS_BONUS_SCANSTAMP))
141 sa_object_info(zp->z_sa_hdl, &doi);
142 len = sizeof (xoap->xoa_av_scanstamp) +
143 ZFS_OLD_ZNODE_PHYS_SIZE;
145 if (len <= doi.doi_bonus_size) {
146 (void) memcpy(xoap->xoa_av_scanstamp,
147 (caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
148 sizeof (xoap->xoa_av_scanstamp));
151 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
155 zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
157 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
160 ASSERT_VOP_ELOCKED(ZTOV(zp), __func__);
161 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
163 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
164 &xoap->xoa_av_scanstamp,
165 sizeof (xoap->xoa_av_scanstamp), tx));
167 dmu_object_info_t doi;
168 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
171 sa_object_info(zp->z_sa_hdl, &doi);
172 len = sizeof (xoap->xoa_av_scanstamp) +
173 ZFS_OLD_ZNODE_PHYS_SIZE;
174 if (len > doi.doi_bonus_size)
175 VERIFY(dmu_set_bonus(db, len, tx) == 0);
176 (void) memcpy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
177 xoap->xoa_av_scanstamp, sizeof (xoap->xoa_av_scanstamp));
179 zp->z_pflags |= ZFS_BONUS_SCANSTAMP;
180 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
181 &zp->z_pflags, sizeof (uint64_t), tx));
186 * I'm not convinced we should do any of this upgrade.
187 * since the SA code can read both old/new znode formats
188 * with probably little to no performance difference.
190 * All new files will be created with the new format.
194 zfs_sa_upgrade(sa_handle_t *hdl, dmu_tx_t *tx)
196 dmu_buf_t *db = sa_get_db(hdl);
197 znode_t *zp = sa_get_userdata(hdl);
198 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
199 sa_bulk_attr_t bulk[20];
201 sa_bulk_attr_t sa_attrs[20] = { 0 };
202 zfs_acl_locator_cb_t locate = { 0 };
203 uint64_t uid, gid, mode, rdev, xattr, parent;
204 uint64_t crtime[2], mtime[2], ctime[2];
205 zfs_acl_phys_t znode_acl;
206 char scanstamp[AV_SCANSTAMP_SZ];
209 * No upgrade if ACL isn't cached
210 * since we won't know which locks are held
211 * and ready the ACL would require special "locked"
212 * interfaces that would be messy
214 if (zp->z_acl_cached == NULL || ZTOV(zp)->v_type == VLNK)
218 * If the vnode lock is held and we aren't the owner
219 * then just return since we don't want to deadlock
220 * trying to update the status of z_is_sa. This
221 * file can then be upgraded at a later time.
223 * Otherwise, we know we are doing the
224 * sa_update() that caused us to enter this function.
226 if (vn_lock(ZTOV(zp), LK_EXCLUSIVE | LK_NOWAIT) != 0)
229 /* First do a bulk query of the attributes that aren't cached */
230 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
231 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
232 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16);
233 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
234 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
235 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8);
236 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8);
237 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
238 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
239 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
242 if (sa_bulk_lookup_locked(hdl, bulk, count) != 0)
247 * While the order here doesn't matter its best to try and organize
248 * it is such a way to pick up an already existing layout number
251 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
252 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL,
254 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs),
255 NULL, &zp->z_gen, 8);
256 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
257 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
258 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs),
260 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL,
262 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL,
264 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL,
266 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL,
268 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL,
270 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL,
272 if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR)
273 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL,
275 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
276 &zp->z_acl_cached->z_acl_count, 8);
278 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID)
279 zfs_acl_xform(zp, zp->z_acl_cached, CRED());
281 locate.cb_aclp = zp->z_acl_cached;
282 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs),
283 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes);
286 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs),
289 /* if scanstamp then add scanstamp */
291 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) {
292 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
293 scanstamp, AV_SCANSTAMP_SZ);
294 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs),
295 NULL, scanstamp, AV_SCANSTAMP_SZ);
296 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP;
299 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0);
300 VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs,
302 if (znode_acl.z_acl_extern_obj)
303 VERIFY(0 == dmu_object_free(zfsvfs->z_os,
304 znode_acl.z_acl_extern_obj, tx));
306 zp->z_is_sa = B_TRUE;
308 VOP_UNLOCK(ZTOV(zp), 0);
312 zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp)
314 if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa)
318 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
320 if (zfs_external_acl(zp)) {
321 dmu_tx_hold_free(tx, zfs_external_acl(zp), 0,