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 31 /* 32 * ZPL attribute registration table. 33 * Order of attributes doesn't matter 34 * a unique value will be assigned for each 35 * attribute that is file system specific 36 * 37 * This is just the set of ZPL attributes that this 38 * version of ZFS deals with natively. The file system 39 * could have other attributes stored in files, but they will be 40 * ignored. The SA framework will preserve them, just that 41 * this version of ZFS won't change or delete them. 42 */ 43 44 sa_attr_reg_t zfs_attr_table[ZPL_END+1] = { 45 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0}, 46 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1}, 47 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2}, 48 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3}, 49 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4}, 50 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5}, 51 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6}, 52 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7}, 53 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8}, 54 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9}, 55 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10}, 56 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11}, 57 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12}, 58 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13}, 59 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14}, 60 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15}, 61 {"ZPL_DACL_COUNT", sizeof (uint64_t), SA_UINT64_ARRAY, 0}, 62 {"ZPL_SYMLINK", 0, SA_UINT8_ARRAY, 0}, 63 {"ZPL_SCANSTAMP", 32, SA_UINT8_ARRAY, 0}, 64 {"ZPL_DACL_ACES", 0, SA_ACL, 0}, 65 {NULL, 0, 0, 0} 66 }; 67 68 #ifdef _KERNEL 69 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; 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); 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); 110 VERIFY(0 == dmu_buf_hold(zp->z_zfsvfs->z_os, 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 { 124 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 125 xoptattr_t *xoap; 126 127 ASSERT(MUTEX_HELD(&zp->z_lock)); 128 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL); 129 if (zp->z_is_sa) { 130 if (sa_lookup(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs), 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 { 158 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 159 xoptattr_t *xoap; 160 161 ASSERT(MUTEX_HELD(&zp->z_lock)); 162 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL); 163 if (zp->z_is_sa) 164 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs), 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; 181 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs), 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 no 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); 199 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 200 sa_bulk_attr_t bulk[20]; 201 int count = 0; 202 sa_bulk_attr_t sa_attrs[20] = { 0 }; 203 zfs_acl_locator_cb_t locate = { 0 }; 204 uint64_t uid, gid, mode, rdev, xattr, parent; 205 uint64_t crtime[2], mtime[2], ctime[2]; 206 zfs_acl_phys_t znode_acl; 207 char scanstamp[AV_SCANSTAMP_SZ]; 208 boolean_t drop_lock = B_FALSE; 209 210 /* 211 * No upgrade if ACL isn't cached 212 * since we won't know which locks are held 213 * and ready the ACL would require special "locked" 214 * interfaces that would be messy 215 */ 216 if (zp->z_acl_cached == NULL || ZTOV(zp)->v_type == VLNK) 217 return; 218 219 /* 220 * If the z_lock is held and we aren't the owner 221 * the just return since we don't want to deadlock 222 * trying to update the status of z_is_sa. This 223 * file can then be upgraded at a later time. 224 * 225 * Otherwise, we know we are doing the 226 * sa_update() that caused us to enter this function. 227 */ 228 if (mutex_owner(&zp->z_lock) != curthread) { 229 if (mutex_tryenter(&zp->z_lock) == 0) 230 return; 231 else 232 drop_lock = B_TRUE; 233 } 234 235 /* First do a bulk query of the attributes that aren't cached */ 236 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 237 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 238 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); 239 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 240 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8); 241 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8); 242 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8); 243 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 244 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 245 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL, 246 &znode_acl, 88); 247 248 if (sa_bulk_lookup_locked(hdl, bulk, count) != 0) 249 goto done; 250 251 252 /* 253 * While the order here doesn't matter its best to try and organize 254 * it is such a way to pick up an already existing layout number 255 */ 256 count = 0; 257 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 258 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL, 259 &zp->z_size, 8); 260 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs), 261 NULL, &zp->z_gen, 8); 262 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 263 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 264 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs), 265 NULL, &parent, 8); 266 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL, 267 &zp->z_pflags, 8); 268 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL, 269 zp->z_atime, 16); 270 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL, 271 &mtime, 16); 272 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL, 273 &ctime, 16); 274 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL, 275 &crtime, 16); 276 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL, 277 &zp->z_links, 8); 278 if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR) 279 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL, 280 &rdev, 8); 281 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL, 282 &zp->z_acl_cached->z_acl_count, 8); 283 284 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID) 285 zfs_acl_xform(zp, zp->z_acl_cached, CRED()); 286 287 locate.cb_aclp = zp->z_acl_cached; 288 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs), 289 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes); 290 291 if (xattr) 292 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs), 293 NULL, &xattr, 8); 294 295 /* if scanstamp then add scanstamp */ 296 297 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) { 298 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE, 299 scanstamp, AV_SCANSTAMP_SZ); 300 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs), 301 NULL, scanstamp, AV_SCANSTAMP_SZ); 302 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP; 303 } 304 305 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0); 306 VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs, 307 count, tx) == 0); 308 if (znode_acl.z_acl_extern_obj) 309 VERIFY(0 == dmu_object_free(zfsvfs->z_os, 310 znode_acl.z_acl_extern_obj, tx)); 311 312 zp->z_is_sa = B_TRUE; 313 done: 314 if (drop_lock) 315 mutex_exit(&zp->z_lock); 316 } 317 318 void 319 zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp) 320 { 321 if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa) 322 return; 323 324 325 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 326 327 if (zfs_external_acl(zp)) { 328 dmu_tx_hold_free(tx, zfs_external_acl(zp), 0, 329 DMU_OBJECT_END); 330 } 331 } 332 333 #endif 334