4 * The contents of this file are subject to the terms of the
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6 * You may not use this file except in compliance with the License.
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9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
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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
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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(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 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(zp->z_zfsvfs->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 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
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(zfsvfs),
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 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
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(zfsvfs),
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(zfsvfs),
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 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
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 || ZTOV(zp)->v_type == VLNK)
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(zfsvfs), NULL, &mtime, 16);
241 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
242 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16);
243 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
244 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
245 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8);
246 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8);
247 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
248 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
249 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), 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(zfsvfs), NULL, &mode, 8);
264 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL,
266 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs),
267 NULL, &zp->z_gen, 8);
268 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
269 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
270 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs),
272 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL,
274 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL,
276 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL,
278 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL,
280 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL,
282 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL,
284 if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR)
285 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL,
287 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), 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(zfsvfs),
295 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes);
298 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs),
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(zfsvfs),
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(zfsvfs->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 (!zp->z_zfsvfs->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,