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 70 71 int 72 zfs_sa_readlink(znode_t *zp, uio_t *uio) 73 { 74 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl); 75 size_t bufsz; 76 int error; 77 78 bufsz = zp->z_size; 79 if (bufsz + ZFS_OLD_ZNODE_PHYS_SIZE <= db->db_size) { 80 error = uiomove((caddr_t)db->db_data + 81 ZFS_OLD_ZNODE_PHYS_SIZE, 82 MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 83 } else { 84 dmu_buf_t *dbp; 85 if ((error = dmu_buf_hold(zp->z_zfsvfs->z_os, zp->z_id, 86 0, FTAG, &dbp, DMU_READ_NO_PREFETCH)) == 0) { 87 error = uiomove(dbp->db_data, 88 MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 89 dmu_buf_rele(dbp, FTAG); 90 } 91 } 92 return (error); 93 } 94 95 void 96 zfs_sa_symlink(znode_t *zp, char *link, int len, dmu_tx_t *tx) 97 { 98 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl); 99 100 if (ZFS_OLD_ZNODE_PHYS_SIZE + len <= dmu_bonus_max()) { 101 VERIFY(dmu_set_bonus(db, 102 len + ZFS_OLD_ZNODE_PHYS_SIZE, tx) == 0); 103 if (len) { 104 bcopy(link, (caddr_t)db->db_data + 105 ZFS_OLD_ZNODE_PHYS_SIZE, len); 106 } 107 } else { 108 dmu_buf_t *dbp; 109 110 zfs_grow_blocksize(zp, len, tx); 111 VERIFY(0 == dmu_buf_hold(zp->z_zfsvfs->z_os, 112 zp->z_id, 0, FTAG, &dbp, DMU_READ_NO_PREFETCH)); 113 114 dmu_buf_will_dirty(dbp, tx); 115 116 ASSERT3U(len, <=, dbp->db_size); 117 bcopy(link, dbp->db_data, len); 118 dmu_buf_rele(dbp, FTAG); 119 } 120 } 121 122 void 123 zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap) 124 { 125 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 126 xoptattr_t *xoap; 127 128 ASSERT(MUTEX_HELD(&zp->z_lock)); 129 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL); 130 if (zp->z_is_sa) { 131 if (sa_lookup(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs), 132 &xoap->xoa_av_scanstamp, 133 sizeof (xoap->xoa_av_scanstamp)) != 0) 134 return; 135 } else { 136 dmu_object_info_t doi; 137 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl); 138 int len; 139 140 if (!(zp->z_pflags & ZFS_BONUS_SCANSTAMP)) 141 return; 142 143 sa_object_info(zp->z_sa_hdl, &doi); 144 len = sizeof (xoap->xoa_av_scanstamp) + 145 ZFS_OLD_ZNODE_PHYS_SIZE; 146 147 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)); 151 } 152 } 153 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); 154 } 155 156 void 157 zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx) 158 { 159 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 160 xoptattr_t *xoap; 161 162 ASSERT(MUTEX_HELD(&zp->z_lock)); 163 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL); 164 if (zp->z_is_sa) 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)); 168 else { 169 dmu_object_info_t doi; 170 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl); 171 int len; 172 173 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)); 180 181 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)); 184 } 185 } 186 187 /* 188 * I'm not convinced we should do any of this upgrade. 189 * since the SA code can read both old/new znode formats 190 * with probably little to no performance difference. 191 * 192 * All new files will be created with the new format. 193 */ 194 195 void 196 zfs_sa_upgrade(sa_handle_t *hdl, dmu_tx_t *tx) 197 { 198 dmu_buf_t *db = sa_get_db(hdl); 199 znode_t *zp = sa_get_userdata(hdl); 200 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 201 sa_bulk_attr_t bulk[20]; 202 int count = 0; 203 sa_bulk_attr_t sa_attrs[20] = { 0 }; 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 char scanstamp[AV_SCANSTAMP_SZ]; 209 boolean_t drop_lock = B_FALSE; 210 211 /* 212 * No upgrade if ACL isn't cached 213 * since we won't know which locks are held 214 * and ready the ACL would require special "locked" 215 * interfaces that would be messy 216 */ 217 if (zp->z_acl_cached == NULL || ZTOV(zp)->v_type == VLNK) 218 return; 219 220 /* 221 * If the z_lock is held and we aren't the owner 222 * the just return since we don't want to deadlock 223 * trying to update the status of z_is_sa. This 224 * file can then be upgraded at a later time. 225 * 226 * Otherwise, we know we are doing the 227 * sa_update() that caused us to enter this function. 228 */ 229 if (mutex_owner(&zp->z_lock) != curthread) { 230 if (mutex_tryenter(&zp->z_lock) == 0) 231 return; 232 else 233 drop_lock = B_TRUE; 234 } 235 236 /* First do a bulk query of the attributes that aren't cached */ 237 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 238 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 239 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); 240 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 241 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8); 242 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8); 243 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8); 244 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 245 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 246 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL, 247 &znode_acl, 88); 248 249 if (sa_bulk_lookup_locked(hdl, bulk, count) != 0) 250 goto done; 251 252 253 /* 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; 258 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 259 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL, 260 &zp->z_size, 8); 261 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs), 262 NULL, &zp->z_gen, 8); 263 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 264 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 265 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs), 266 NULL, &parent, 8); 267 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL, 268 &zp->z_pflags, 8); 269 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL, 270 zp->z_atime, 16); 271 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL, 272 &mtime, 16); 273 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL, 274 &ctime, 16); 275 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL, 276 &crtime, 16); 277 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL, 278 &zp->z_links, 8); 279 if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR) 280 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL, 281 &rdev, 8); 282 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL, 283 &zp->z_acl_cached->z_acl_count, 8); 284 285 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID) 286 zfs_acl_xform(zp, zp->z_acl_cached, CRED()); 287 288 locate.cb_aclp = zp->z_acl_cached; 289 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs), 290 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes); 291 292 if (xattr) 293 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs), 294 NULL, &xattr, 8); 295 296 /* if scanstamp then add scanstamp */ 297 298 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) { 299 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE, 300 scanstamp, AV_SCANSTAMP_SZ); 301 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs), 302 NULL, scanstamp, AV_SCANSTAMP_SZ); 303 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP; 304 } 305 306 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0); 307 VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs, 308 count, tx) == 0); 309 if (znode_acl.z_acl_extern_obj) 310 VERIFY(0 == dmu_object_free(zfsvfs->z_os, 311 znode_acl.z_acl_extern_obj, tx)); 312 313 zp->z_is_sa = B_TRUE; 314 done: 315 if (drop_lock) 316 mutex_exit(&zp->z_lock); 317 } 318 319 void 320 zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp) 321 { 322 if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa) 323 return; 324 325 326 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 327 328 if (zfs_external_acl(zp)) { 329 dmu_tx_hold_free(tx, zfs_external_acl(zp), 0, 330 DMU_OBJECT_END); 331 } 332 } 333 334 #endif 335