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 44sa_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 70int 71zfs_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 94void 95zfs_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 121void 122zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap) 123{ 124 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 125 xoptattr_t *xoap; 126 127 ASSERT_VOP_LOCKED(ZTOV(zp), __func__); 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 155void 156zfs_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_VOP_ELOCKED(ZTOV(zp), __func__); 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 194void 195zfs_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]; 208 209 /* 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 vnode lock is held and we aren't the owner 220 * then 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 (vn_lock(ZTOV(zp), LK_EXCLUSIVE | LK_NOWAIT) != 0) 228 return; 229 230 /* First do a bulk query of the attributes that aren't cached */ 231 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 232 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 233 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); 234 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 235 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8); 236 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8); 237 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8); 238 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 239 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 240 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL, 241 &znode_acl, 88); 242 243 if (sa_bulk_lookup_locked(hdl, bulk, count) != 0) 244 goto done; 245 246 247 /* 248 * While the order here doesn't matter its best to try and organize 249 * it is such a way to pick up an already existing layout number 250 */ 251 count = 0; 252 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); 253 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL, 254 &zp->z_size, 8); 255 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs), 256 NULL, &zp->z_gen, 8); 257 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8); 258 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8); 259 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs), 260 NULL, &parent, 8); 261 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL, 262 &zp->z_pflags, 8); 263 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL, 264 zp->z_atime, 16); 265 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL, 266 &mtime, 16); 267 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL, 268 &ctime, 16); 269 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL, 270 &crtime, 16); 271 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL, 272 &zp->z_links, 8); 273 if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR) 274 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL, 275 &rdev, 8); 276 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL, 277 &zp->z_acl_cached->z_acl_count, 8); 278 279 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID) 280 zfs_acl_xform(zp, zp->z_acl_cached, CRED()); 281 282 locate.cb_aclp = zp->z_acl_cached; 283 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs), 284 zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes); 285 286 if (xattr) 287 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs), 288 NULL, &xattr, 8); 289 290 /* if scanstamp then add scanstamp */ 291 292 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) { 293 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE, 294 scanstamp, AV_SCANSTAMP_SZ); 295 SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs), 296 NULL, scanstamp, AV_SCANSTAMP_SZ); 297 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP; 298 } 299 300 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0); 301 VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs, 302 count, tx) == 0); 303 if (znode_acl.z_acl_extern_obj) 304 VERIFY(0 == dmu_object_free(zfsvfs->z_os, 305 znode_acl.z_acl_extern_obj, tx)); 306 307 zp->z_is_sa = B_TRUE; 308done: 309 VOP_UNLOCK(ZTOV(zp), 0); 310} 311 312void 313zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp) 314{ 315 if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa) 316 return; 317 318 319 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 320 321 if (zfs_external_acl(zp)) { 322 dmu_tx_hold_free(tx, zfs_external_acl(zp), 0, 323 DMU_OBJECT_END); 324 } 325} 326 327#endif 328