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428870ff BB |
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/types.h> | |
26 | #include <sys/param.h> | |
27 | #include <sys/vnode.h> | |
28 | #include <sys/sa.h> | |
29 | #include <sys/zfs_acl.h> | |
30 | #include <sys/zfs_sa.h> | |
31 | ||
32 | /* | |
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 | |
37 | * | |
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. | |
43 | */ | |
44 | ||
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}, | |
66 | {NULL, 0, 0, 0} | |
67 | }; | |
68 | ||
69 | #ifdef _KERNEL | |
428870ff BB |
70 | int |
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; | |
3558fd73 | 84 | if ((error = dmu_buf_hold(ZTOZSB(zp)->z_os, zp->z_id, |
428870ff BB |
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 | |
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); | |
3558fd73 | 110 | VERIFY(0 == dmu_buf_hold(ZTOZSB(zp)->z_os, |
428870ff BB |
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 | |
122 | zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap) | |
123 | { | |
3558fd73 | 124 | zfs_sb_t *zsb = ZTOZSB(zp); |
428870ff BB |
125 | xoptattr_t *xoap; |
126 | ||
572e2857 | 127 | ASSERT(MUTEX_HELD(&zp->z_lock)); |
428870ff BB |
128 | VERIFY((xoap = xva_getxoptattr(xvap)) != NULL); |
129 | if (zp->z_is_sa) { | |
3558fd73 | 130 | if (sa_lookup(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zsb), |
428870ff BB |
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 | |
156 | zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx) | |
157 | { | |
3558fd73 | 158 | zfs_sb_t *zsb = ZTOZSB(zp); |
428870ff BB |
159 | xoptattr_t *xoap; |
160 | ||
572e2857 | 161 | ASSERT(MUTEX_HELD(&zp->z_lock)); |
428870ff BB |
162 | VERIFY((xoap = xva_getxoptattr(xvap)) != NULL); |
163 | if (zp->z_is_sa) | |
3558fd73 | 164 | VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zsb), |
428870ff BB |
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; | |
3558fd73 | 181 | VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zsb), |
428870ff BB |
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 know performance difference. | |
190 | * | |
191 | * All new files will be created with the new format. | |
192 | */ | |
193 | ||
194 | void | |
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); | |
3558fd73 | 199 | zfs_sb_t *zsb = ZTOZSB(zp); |
428870ff | 200 | int count = 0; |
1ee1b767 | 201 | sa_bulk_attr_t *bulk, *sa_attrs; |
428870ff BB |
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]; | |
572e2857 | 207 | boolean_t drop_lock = B_FALSE; |
428870ff BB |
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 | */ | |
3558fd73 | 215 | if (zp->z_acl_cached == NULL || S_ISLNK(ZTOI(zp)->i_mode)) |
428870ff BB |
216 | return; |
217 | ||
572e2857 BB |
218 | /* |
219 | * If the z_lock is held and we aren't the owner | |
220 | * the 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 (mutex_owner(&zp->z_lock) != curthread) { | |
228 | if (mutex_tryenter(&zp->z_lock) == 0) | |
229 | return; | |
230 | else | |
231 | drop_lock = B_TRUE; | |
232 | } | |
233 | ||
428870ff | 234 | /* First do a bulk query of the attributes that aren't cached */ |
1ee1b767 | 235 | bulk = kmem_alloc(sizeof(sa_bulk_attr_t) * 20, KM_SLEEP); |
3558fd73 BB |
236 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zsb), NULL, &mtime, 16); |
237 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zsb), NULL, &ctime, 16); | |
238 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zsb), NULL, &crtime, 16); | |
239 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zsb), NULL, &mode, 8); | |
240 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zsb), NULL, &parent, 8); | |
241 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zsb), NULL, &xattr, 8); | |
242 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zsb), NULL, &rdev, 8); | |
243 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zsb), NULL, &uid, 8); | |
244 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zsb), NULL, &gid, 8); | |
245 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zsb), NULL, | |
428870ff BB |
246 | &znode_acl, 88); |
247 | ||
1ee1b767 BB |
248 | if (sa_bulk_lookup_locked(hdl, bulk, count) != 0) { |
249 | kmem_free(bulk, sizeof(sa_bulk_attr_t) * 20); | |
572e2857 | 250 | goto done; |
1ee1b767 | 251 | } |
428870ff BB |
252 | |
253 | /* | |
254 | * While the order here doesn't matter its best to try and organize | |
255 | * it is such a way to pick up an already existing layout number | |
256 | */ | |
257 | count = 0; | |
1ee1b767 | 258 | sa_attrs = kmem_zalloc(sizeof(sa_bulk_attr_t) * 20, KM_SLEEP); |
3558fd73 BB |
259 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zsb), NULL, &mode, 8); |
260 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zsb), NULL, | |
428870ff | 261 | &zp->z_size, 8); |
3558fd73 | 262 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zsb), |
428870ff | 263 | NULL, &zp->z_gen, 8); |
3558fd73 BB |
264 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zsb), NULL, &uid, 8); |
265 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zsb), NULL, &gid, 8); | |
266 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zsb), | |
428870ff | 267 | NULL, &parent, 8); |
3558fd73 | 268 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zsb), NULL, |
428870ff | 269 | &zp->z_pflags, 8); |
3558fd73 | 270 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zsb), NULL, |
428870ff | 271 | zp->z_atime, 16); |
3558fd73 | 272 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zsb), NULL, |
428870ff | 273 | &mtime, 16); |
3558fd73 | 274 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zsb), NULL, |
428870ff | 275 | &ctime, 16); |
3558fd73 | 276 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zsb), NULL, |
428870ff | 277 | &crtime, 16); |
3558fd73 | 278 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zsb), NULL, |
428870ff | 279 | &zp->z_links, 8); |
3558fd73 BB |
280 | if (S_ISBLK(ZTOI(zp)->i_mode) || S_ISCHR(ZTOI(zp)->i_mode)) |
281 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zsb), NULL, | |
428870ff | 282 | &rdev, 8); |
3558fd73 | 283 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zsb), NULL, |
428870ff BB |
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; | |
3558fd73 | 290 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zsb), |
428870ff | 291 | zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes); |
572e2857 | 292 | |
428870ff | 293 | if (xattr) |
3558fd73 | 294 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zsb), |
572e2857 | 295 | NULL, &xattr, 8); |
428870ff BB |
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); | |
3558fd73 | 302 | SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zsb), |
428870ff BB |
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) | |
3558fd73 | 311 | VERIFY(0 == dmu_object_free(zsb->z_os, |
428870ff BB |
312 | znode_acl.z_acl_extern_obj, tx)); |
313 | ||
314 | zp->z_is_sa = B_TRUE; | |
1ee1b767 BB |
315 | kmem_free(sa_attrs, sizeof(sa_bulk_attr_t) * 20); |
316 | kmem_free(bulk, sizeof(sa_bulk_attr_t) * 20); | |
572e2857 BB |
317 | done: |
318 | if (drop_lock) | |
319 | mutex_exit(&zp->z_lock); | |
428870ff BB |
320 | } |
321 | ||
322 | void | |
323 | zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp) | |
324 | { | |
3558fd73 | 325 | if (!ZTOZSB(zp)->z_use_sa || zp->z_is_sa) |
428870ff BB |
326 | return; |
327 | ||
428870ff BB |
328 | |
329 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); | |
330 | ||
572e2857 BB |
331 | if (zfs_external_acl(zp)) { |
332 | dmu_tx_hold_free(tx, zfs_external_acl(zp), 0, | |
428870ff BB |
333 | DMU_OBJECT_END); |
334 | } | |
335 | } | |
336 | ||
337 | #endif |