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 46 sa_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_DXATTR", 0, SA_UINT8_ARRAY, 0}, 68 {"ZPL_PROJID", sizeof (uint64_t), SA_UINT64_ARRAY, 0}, 69 {NULL, 0, 0, 0} 70 }; 71 72 #ifdef _KERNEL 73 int 74 zfs_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_resid(uio)), UIO_READ, uio); 85 } else { 86 dmu_buf_t *dbp; 87 if ((error = dmu_buf_hold(ZTOZSB(zp)->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_resid(uio)), UIO_READ, uio); 91 dmu_buf_rele(dbp, FTAG); 92 } 93 } 94 return (error); 95 } 96 97 void 98 zfs_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 VERIFY0(dmu_buf_hold(ZTOZSB(zp)->z_os, zp->z_id, 0, FTAG, &dbp, 113 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 } 122 123 void 124 zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap) 125 { 126 zfsvfs_t *zfsvfs = ZTOZSB(zp); 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 } 156 157 void 158 zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx) 159 { 160 zfsvfs_t *zfsvfs = ZTOZSB(zp); 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 int 189 zfs_sa_get_xattr(znode_t *zp) 190 { 191 zfsvfs_t *zfsvfs = ZTOZSB(zp); 192 char *obj; 193 int size; 194 int error; 195 196 ASSERT(RW_LOCK_HELD(&zp->z_xattr_lock)); 197 ASSERT(!zp->z_xattr_cached); 198 ASSERT(zp->z_is_sa); 199 200 error = sa_size(zp->z_sa_hdl, SA_ZPL_DXATTR(zfsvfs), &size); 201 if (error) { 202 if (error == ENOENT) 203 return nvlist_alloc(&zp->z_xattr_cached, 204 NV_UNIQUE_NAME, KM_SLEEP); 205 else 206 return (error); 207 } 208 209 obj = vmem_alloc(size, KM_SLEEP); 210 211 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DXATTR(zfsvfs), obj, size); 212 if (error == 0) 213 error = nvlist_unpack(obj, size, &zp->z_xattr_cached, KM_SLEEP); 214 215 vmem_free(obj, size); 216 217 return (error); 218 } 219 220 int 221 zfs_sa_set_xattr(znode_t *zp) 222 { 223 zfsvfs_t *zfsvfs = ZTOZSB(zp); 224 dmu_tx_t *tx; 225 char *obj; 226 size_t size; 227 int error; 228 229 ASSERT(RW_WRITE_HELD(&zp->z_xattr_lock)); 230 ASSERT(zp->z_xattr_cached); 231 ASSERT(zp->z_is_sa); 232 233 error = nvlist_size(zp->z_xattr_cached, &size, NV_ENCODE_XDR); 234 if ((error == 0) && (size > SA_ATTR_MAX_LEN)) 235 error = SET_ERROR(EFBIG); 236 if (error) 237 goto out; 238 239 obj = vmem_alloc(size, KM_SLEEP); 240 241 error = nvlist_pack(zp->z_xattr_cached, &obj, &size, 242 NV_ENCODE_XDR, KM_SLEEP); 243 if (error) 244 goto out_free; 245 246 tx = dmu_tx_create(zfsvfs->z_os); 247 dmu_tx_hold_sa_create(tx, size); 248 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 249 250 error = dmu_tx_assign(tx, TXG_WAIT); 251 if (error) { 252 dmu_tx_abort(tx); 253 } else { 254 int count = 0; 255 sa_bulk_attr_t bulk[2]; 256 uint64_t ctime[2]; 257 258 zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime); 259 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DXATTR(zfsvfs), 260 NULL, obj, size); 261 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), 262 NULL, &ctime, 16); 263 VERIFY0(sa_bulk_update(zp->z_sa_hdl, bulk, count, tx)); 264 265 dmu_tx_commit(tx); 266 } 267 out_free: 268 vmem_free(obj, size); 269 out: 270 return (error); 271 } 272 273 /* 274 * I'm not convinced we should do any of this upgrade. 275 * since the SA code can read both old/new znode formats 276 * with probably little to no performance difference. 277 * 278 * All new files will be created with the new format. 279 */ 280 281 void 282 zfs_sa_upgrade(sa_handle_t *hdl, dmu_tx_t *tx) 283 { 284 dmu_buf_t *db = sa_get_db(hdl); 285 znode_t *zp = sa_get_userdata(hdl); 286 zfsvfs_t *zfsvfs = ZTOZSB(zp); 287 int count = 0; 288 sa_bulk_attr_t *bulk, *sa_attrs; 289 zfs_acl_locator_cb_t locate = { 0 }; 290 uint64_t uid, gid, mode, rdev, xattr, parent, tmp_gen; 291 uint64_t crtime[2], mtime[2], ctime[2], atime[2]; 292 uint64_t links; 293 zfs_acl_phys_t znode_acl; 294 char scanstamp[AV_SCANSTAMP_SZ]; 295 boolean_t drop_lock = B_FALSE; 296 297 /* 298 * No upgrade if ACL isn't cached 299 * since we won't know which locks are held 300 * and ready the ACL would require special "locked" 301 * interfaces that would be messy 302 */ 303 if (zp->z_acl_cached == NULL || Z_ISLNK(ZTOTYPE(zp))) 304 return; 305 306 /* 307 * If the z_lock is held and we aren't the owner 308 * the just return since we don't want to deadlock 309 * trying to update the status of z_is_sa. This 310 * file can then be upgraded at a later time. 311 * 312 * Otherwise, we know we are doing the 313 * sa_update() that caused us to enter this function. 314 */ 315 if (MUTEX_NOT_HELD(&zp->z_lock)) { 316 if (mutex_tryenter(&zp->z_lock) == 0) 317 return; 318 else 319 drop_lock = B_TRUE; 320 } 321 322 /* First do a bulk query of the attributes that aren't cached */ 323 bulk = kmem_alloc(sizeof (sa_bulk_attr_t) * ZPL_END, KM_SLEEP); 324 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL, &atime, 16); 325 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 326 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 327 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); 328 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 329 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8); 330 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8); 331 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8); 332 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 333 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 334 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL, &tmp_gen, 8); 335 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL, 336 &znode_acl, 88); 337 338 if (sa_bulk_lookup_locked(hdl, bulk, count) != 0) 339 goto done; 340 341 if (dmu_objset_projectquota_enabled(hdl->sa_os) && 342 !(zp->z_pflags & ZFS_PROJID)) { 343 zp->z_pflags |= ZFS_PROJID; 344 zp->z_projid = ZFS_DEFAULT_PROJID; 345 } 346 347 /* 348 * While the order here doesn't matter its best to try and organize 349 * it is such a way to pick up an already existing layout number 350 */ 351 count = 0; 352 sa_attrs = kmem_zalloc(sizeof (sa_bulk_attr_t) * ZPL_END, KM_SLEEP); 353 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 354 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL, 355 &zp->z_size, 8); 356 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs), 357 NULL, &tmp_gen, 8); 358 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 359 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 360 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs), 361 NULL, &parent, 8); 362 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL, 363 &zp->z_pflags, 8); 364 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL, 365 &atime, 16); 366 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL, 367 &mtime, 16); 368 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL, 369 &ctime, 16); 370 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL, 371 &crtime, 16); 372 links = ZTONLNK(zp); 373 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL, 374 &links, 8); 375 if (dmu_objset_projectquota_enabled(hdl->sa_os)) 376 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PROJID(zfsvfs), NULL, 377 &zp->z_projid, 8); 378 if (Z_ISBLK(ZTOTYPE(zp)) || Z_ISCHR(ZTOTYPE(zp))) 379 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL, 380 &rdev, 8); 381 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL, 382 &zp->z_acl_cached->z_acl_count, 8); 383 384 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID) 385 zfs_acl_xform(zp, zp->z_acl_cached, CRED()); 386 387 locate.cb_aclp = zp->z_acl_cached; 388 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs), 389 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes); 390 391 if (xattr) 392 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs), 393 NULL, &xattr, 8); 394 395 /* if scanstamp then add scanstamp */ 396 397 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) { 398 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE, 399 scanstamp, AV_SCANSTAMP_SZ); 400 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs), 401 NULL, scanstamp, AV_SCANSTAMP_SZ); 402 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP; 403 } 404 405 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0); 406 VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs, 407 count, tx) == 0); 408 if (znode_acl.z_acl_extern_obj) 409 VERIFY(0 == dmu_object_free(zfsvfs->z_os, 410 znode_acl.z_acl_extern_obj, tx)); 411 412 zp->z_is_sa = B_TRUE; 413 kmem_free(sa_attrs, sizeof (sa_bulk_attr_t) * ZPL_END); 414 done: 415 kmem_free(bulk, sizeof (sa_bulk_attr_t) * ZPL_END); 416 if (drop_lock) 417 mutex_exit(&zp->z_lock); 418 } 419 420 void 421 zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp) 422 { 423 if (!ZTOZSB(zp)->z_use_sa || zp->z_is_sa) 424 return; 425 426 427 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 428 429 if (zfs_external_acl(zp)) { 430 dmu_tx_hold_free(tx, zfs_external_acl(zp), 0, 431 DMU_OBJECT_END); 432 } 433 } 434 435 EXPORT_SYMBOL(zfs_attr_table); 436 EXPORT_SYMBOL(zfs_sa_readlink); 437 EXPORT_SYMBOL(zfs_sa_symlink); 438 EXPORT_SYMBOL(zfs_sa_get_scanstamp); 439 EXPORT_SYMBOL(zfs_sa_set_scanstamp); 440 EXPORT_SYMBOL(zfs_sa_get_xattr); 441 EXPORT_SYMBOL(zfs_sa_set_xattr); 442 EXPORT_SYMBOL(zfs_sa_upgrade); 443 EXPORT_SYMBOL(zfs_sa_upgrade_txholds); 444 445 #endif 446