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#include <sys/dmu_objset.h>
31#include <sys/sa_impl.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
46sa_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	{"ZPL_PROJID", sizeof (uint64_t), SA_UINT64_ARRAY, 0},
68	{NULL, 0, 0, 0}
69};
70
71#ifdef _KERNEL
72
73int
74zfs_sa_readlink(znode_t *zp, uio_t *uio)
75{
76	dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
77	size_t bufsz;
78	int error;
79
80	bufsz = zp->z_size;
81	if (bufsz + ZFS_OLD_ZNODE_PHYS_SIZE <= db->db_size) {
82		error = uiomove((caddr_t)db->db_data +
83		    ZFS_OLD_ZNODE_PHYS_SIZE,
84		    MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
85	} else {
86		dmu_buf_t *dbp;
87		if ((error = dmu_buf_hold(zp->z_zfsvfs->z_os, zp->z_id,
88		    0, FTAG, &dbp, DMU_READ_NO_PREFETCH)) == 0) {
89			error = uiomove(dbp->db_data,
90			    MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
91			dmu_buf_rele(dbp, FTAG);
92		}
93	}
94	return (error);
95}
96
97void
98zfs_sa_symlink(znode_t *zp, char *link, int len, dmu_tx_t *tx)
99{
100	dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
101
102	if (ZFS_OLD_ZNODE_PHYS_SIZE + len <= dmu_bonus_max()) {
103		VERIFY0(dmu_set_bonus(db, len + ZFS_OLD_ZNODE_PHYS_SIZE, tx));
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
123void
124zfs_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
157void
158zfs_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 no performance difference.
192 *
193 * All new files will be created with the new format.
194 */
195
196void
197zfs_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[22];
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	if (dmu_objset_projectquota_enabled(hdl->sa_os) &&
254	    !(zp->z_pflags & ZFS_PROJID)) {
255		zp->z_pflags |= ZFS_PROJID;
256		zp->z_projid = ZFS_DEFAULT_PROJID;
257	}
258
259	/*
260	 * While the order here doesn't matter its best to try and organize
261	 * it is such a way to pick up an already existing layout number
262	 */
263	count = 0;
264	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
265	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL,
266	    &zp->z_size, 8);
267	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs),
268	    NULL, &zp->z_gen, 8);
269	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
270	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
271	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs),
272	    NULL, &parent, 8);
273	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL,
274	    &zp->z_pflags, 8);
275	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL,
276	    zp->z_atime, 16);
277	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL,
278	    &mtime, 16);
279	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL,
280	    &ctime, 16);
281	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL,
282	    &crtime, 16);
283	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL,
284	    &zp->z_links, 8);
285	if (dmu_objset_projectquota_enabled(hdl->sa_os))
286		SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PROJID(zfsvfs), NULL,
287		    &zp->z_projid, 8);
288	if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR)
289		SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL,
290		    &rdev, 8);
291	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
292	    &zp->z_acl_cached->z_acl_count, 8);
293
294	if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID)
295		zfs_acl_xform(zp, zp->z_acl_cached, CRED());
296
297	locate.cb_aclp = zp->z_acl_cached;
298	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs),
299	    zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes);
300
301	if (xattr)
302		SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs),
303		    NULL, &xattr, 8);
304
305	/* if scanstamp then add scanstamp */
306
307	if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) {
308		bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
309		    scanstamp, AV_SCANSTAMP_SZ);
310		SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs),
311		    NULL, scanstamp, AV_SCANSTAMP_SZ);
312		zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP;
313	}
314
315	VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0);
316	VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs,
317	    count, tx) == 0);
318	if (znode_acl.z_acl_extern_obj)
319		VERIFY(0 == dmu_object_free(zfsvfs->z_os,
320		    znode_acl.z_acl_extern_obj, tx));
321
322	zp->z_is_sa = B_TRUE;
323done:
324	if (drop_lock)
325		mutex_exit(&zp->z_lock);
326}
327
328void
329zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp)
330{
331	if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa)
332		return;
333
334
335	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
336
337	if (zfs_external_acl(zp)) {
338		dmu_tx_hold_free(tx, zfs_external_acl(zp), 0,
339		    DMU_OBJECT_END);
340	}
341}
342
343#endif
344