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 VERIFY0(dmu_set_bonus(db, len + ZFS_OLD_ZNODE_PHYS_SIZE, tx)); 101 if (len) { 102 bcopy(link, (caddr_t)db->db_data + 103 ZFS_OLD_ZNODE_PHYS_SIZE, len); 104 } 105 } else { 106 dmu_buf_t *dbp; 107 108 zfs_grow_blocksize(zp, len, tx); 109 VERIFY(0 == dmu_buf_hold(zp->z_zfsvfs->z_os, 110 zp->z_id, 0, FTAG, &dbp, DMU_READ_NO_PREFETCH)); 111 112 dmu_buf_will_dirty(dbp, tx); 113 114 ASSERT3U(len, <=, dbp->db_size); 115 bcopy(link, dbp->db_data, len); 116 dmu_buf_rele(dbp, FTAG); 117 } 118 } 119 120 void 121 zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap) 122 { 123 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 124 xoptattr_t *xoap; 125 126 ASSERT(MUTEX_HELD(&zp->z_lock)); 127 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL); 128 if (zp->z_is_sa) { 129 if (sa_lookup(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs), 130 &xoap->xoa_av_scanstamp, 131 sizeof (xoap->xoa_av_scanstamp)) != 0) 132 return; 133 } else { 134 dmu_object_info_t doi; 135 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl); 136 int len; 137 138 if (!(zp->z_pflags & ZFS_BONUS_SCANSTAMP)) 139 return; 140 141 sa_object_info(zp->z_sa_hdl, &doi); 142 len = sizeof (xoap->xoa_av_scanstamp) + 143 ZFS_OLD_ZNODE_PHYS_SIZE; 144 145 if (len <= doi.doi_bonus_size) { 146 (void) memcpy(xoap->xoa_av_scanstamp, 147 (caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE, 148 sizeof (xoap->xoa_av_scanstamp)); 149 } 150 } 151 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); 152 } 153 154 void 155 zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx) 156 { 157 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 158 xoptattr_t *xoap; 159 160 ASSERT(MUTEX_HELD(&zp->z_lock)); 161 VERIFY((xoap = xva_getxoptattr(xvap)) != NULL); 162 if (zp->z_is_sa) 163 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs), 164 &xoap->xoa_av_scanstamp, 165 sizeof (xoap->xoa_av_scanstamp), tx)); 166 else { 167 dmu_object_info_t doi; 168 dmu_buf_t *db = sa_get_db(zp->z_sa_hdl); 169 int len; 170 171 sa_object_info(zp->z_sa_hdl, &doi); 172 len = sizeof (xoap->xoa_av_scanstamp) + 173 ZFS_OLD_ZNODE_PHYS_SIZE; 174 if (len > doi.doi_bonus_size) 175 VERIFY(dmu_set_bonus(db, len, tx) == 0); 176 (void) memcpy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE, 177 xoap->xoa_av_scanstamp, sizeof (xoap->xoa_av_scanstamp)); 178 179 zp->z_pflags |= ZFS_BONUS_SCANSTAMP; 180 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs), 181 &zp->z_pflags, sizeof (uint64_t), tx)); 182 } 183 } 184 185 /* 186 * I'm not convinced we should do any of this upgrade. 187 * since the SA code can read both old/new znode formats 188 * with probably little to no performance difference. 189 * 190 * All new files will be created with the new format. 191 */ 192 193 void 194 zfs_sa_upgrade(sa_handle_t *hdl, dmu_tx_t *tx) 195 { 196 dmu_buf_t *db = sa_get_db(hdl); 197 znode_t *zp = sa_get_userdata(hdl); 198 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 199 sa_bulk_attr_t bulk[20]; 200 int count = 0; 201 sa_bulk_attr_t sa_attrs[20] = { 0 }; 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]; 207 boolean_t drop_lock = B_FALSE; 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 */ 215 if (zp->z_acl_cached == NULL || ZTOV(zp)->v_type == VLNK) 216 return; 217 218 /* 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 } 233 234 /* First do a bulk query of the attributes that aren't cached */ 235 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 236 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 237 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); 238 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 239 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8); 240 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8); 241 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8); 242 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 243 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 244 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL, 245 &znode_acl, 88); 246 247 if (sa_bulk_lookup_locked(hdl, bulk, count) != 0) 248 goto done; 249 250 251 /* 252 * While the order here doesn't matter its best to try and organize 253 * it is such a way to pick up an already existing layout number 254 */ 255 count = 0; 256 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 257 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL, 258 &zp->z_size, 8); 259 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs), 260 NULL, &zp->z_gen, 8); 261 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 262 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 263 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs), 264 NULL, &parent, 8); 265 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL, 266 &zp->z_pflags, 8); 267 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL, 268 zp->z_atime, 16); 269 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL, 270 &mtime, 16); 271 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL, 272 &ctime, 16); 273 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL, 274 &crtime, 16); 275 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL, 276 &zp->z_links, 8); 277 if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR) 278 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL, 279 &rdev, 8); 280 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL, 281 &zp->z_acl_cached->z_acl_count, 8); 282 283 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID) 284 zfs_acl_xform(zp, zp->z_acl_cached, CRED()); 285 286 locate.cb_aclp = zp->z_acl_cached; 287 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs), 288 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes); 289 290 if (xattr) 291 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs), 292 NULL, &xattr, 8); 293 294 /* if scanstamp then add scanstamp */ 295 296 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) { 297 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE, 298 scanstamp, AV_SCANSTAMP_SZ); 299 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs), 300 NULL, scanstamp, AV_SCANSTAMP_SZ); 301 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP; 302 } 303 304 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0); 305 VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs, 306 count, tx) == 0); 307 if (znode_acl.z_acl_extern_obj) 308 VERIFY(0 == dmu_object_free(zfsvfs->z_os, 309 znode_acl.z_acl_extern_obj, tx)); 310 311 zp->z_is_sa = B_TRUE; 312 done: 313 if (drop_lock) 314 mutex_exit(&zp->z_lock); 315 } 316 317 void 318 zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp) 319 { 320 if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa) 321 return; 322 323 324 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 325 326 if (zfs_external_acl(zp)) { 327 dmu_tx_hold_free(tx, zfs_external_acl(zp), 0, 328 DMU_OBJECT_END); 329 } 330 } 331 332 #endif 333