zfs_replay.c revision 290765
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) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2013, 2015 by Delphix. All rights reserved. 24 */ 25 26#include <sys/types.h> 27#include <sys/param.h> 28#include <sys/systm.h> 29#include <sys/sysmacros.h> 30#include <sys/cmn_err.h> 31#include <sys/kmem.h> 32#include <sys/file.h> 33#include <sys/fcntl.h> 34#include <sys/vfs.h> 35#include <sys/fs/zfs.h> 36#include <sys/zfs_znode.h> 37#include <sys/zfs_dir.h> 38#include <sys/zfs_acl.h> 39#include <sys/zfs_fuid.h> 40#include <sys/spa.h> 41#include <sys/zil.h> 42#include <sys/byteorder.h> 43#include <sys/stat.h> 44#include <sys/acl.h> 45#include <sys/atomic.h> 46#include <sys/cred.h> 47#include <sys/namei.h> 48 49/* 50 * Functions to replay ZFS intent log (ZIL) records 51 * The functions are called through a function vector (zfs_replay_vector) 52 * which is indexed by the transaction type. 53 */ 54 55static void 56zfs_init_vattr(vattr_t *vap, uint64_t mask, uint64_t mode, 57 uint64_t uid, uint64_t gid, uint64_t rdev, uint64_t nodeid) 58{ 59 VATTR_NULL(vap); 60 vap->va_mask = (uint_t)mask; 61 if (mask & AT_TYPE) 62 vap->va_type = IFTOVT(mode); 63 if (mask & AT_MODE) 64 vap->va_mode = mode & MODEMASK; 65 if (mask & AT_UID) 66 vap->va_uid = (uid_t)(IS_EPHEMERAL(uid)) ? -1 : uid; 67 if (mask & AT_GID) 68 vap->va_gid = (gid_t)(IS_EPHEMERAL(gid)) ? -1 : gid; 69 vap->va_rdev = zfs_cmpldev(rdev); 70 vap->va_nodeid = nodeid; 71} 72 73/* ARGSUSED */ 74static int 75zfs_replay_error(zfsvfs_t *zfsvfs, lr_t *lr, boolean_t byteswap) 76{ 77 return (SET_ERROR(ENOTSUP)); 78} 79 80static void 81zfs_replay_xvattr(lr_attr_t *lrattr, xvattr_t *xvap) 82{ 83 xoptattr_t *xoap = NULL; 84 uint64_t *attrs; 85 uint64_t *crtime; 86 uint32_t *bitmap; 87 void *scanstamp; 88 int i; 89 90 xvap->xva_vattr.va_mask |= AT_XVATTR; 91 if ((xoap = xva_getxoptattr(xvap)) == NULL) { 92 xvap->xva_vattr.va_mask &= ~AT_XVATTR; /* shouldn't happen */ 93 return; 94 } 95 96 ASSERT(lrattr->lr_attr_masksize == xvap->xva_mapsize); 97 98 bitmap = &lrattr->lr_attr_bitmap; 99 for (i = 0; i != lrattr->lr_attr_masksize; i++, bitmap++) 100 xvap->xva_reqattrmap[i] = *bitmap; 101 102 attrs = (uint64_t *)(lrattr + lrattr->lr_attr_masksize - 1); 103 crtime = attrs + 1; 104 scanstamp = (caddr_t)(crtime + 2); 105 106 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) 107 xoap->xoa_hidden = ((*attrs & XAT0_HIDDEN) != 0); 108 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) 109 xoap->xoa_system = ((*attrs & XAT0_SYSTEM) != 0); 110 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) 111 xoap->xoa_archive = ((*attrs & XAT0_ARCHIVE) != 0); 112 if (XVA_ISSET_REQ(xvap, XAT_READONLY)) 113 xoap->xoa_readonly = ((*attrs & XAT0_READONLY) != 0); 114 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) 115 xoap->xoa_immutable = ((*attrs & XAT0_IMMUTABLE) != 0); 116 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) 117 xoap->xoa_nounlink = ((*attrs & XAT0_NOUNLINK) != 0); 118 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) 119 xoap->xoa_appendonly = ((*attrs & XAT0_APPENDONLY) != 0); 120 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) 121 xoap->xoa_nodump = ((*attrs & XAT0_NODUMP) != 0); 122 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) 123 xoap->xoa_opaque = ((*attrs & XAT0_OPAQUE) != 0); 124 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) 125 xoap->xoa_av_modified = ((*attrs & XAT0_AV_MODIFIED) != 0); 126 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) 127 xoap->xoa_av_quarantined = 128 ((*attrs & XAT0_AV_QUARANTINED) != 0); 129 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) 130 ZFS_TIME_DECODE(&xoap->xoa_createtime, crtime); 131 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) 132 bcopy(scanstamp, xoap->xoa_av_scanstamp, AV_SCANSTAMP_SZ); 133 if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) 134 xoap->xoa_reparse = ((*attrs & XAT0_REPARSE) != 0); 135 if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) 136 xoap->xoa_offline = ((*attrs & XAT0_OFFLINE) != 0); 137 if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) 138 xoap->xoa_sparse = ((*attrs & XAT0_SPARSE) != 0); 139} 140 141static int 142zfs_replay_domain_cnt(uint64_t uid, uint64_t gid) 143{ 144 uint64_t uid_idx; 145 uint64_t gid_idx; 146 int domcnt = 0; 147 148 uid_idx = FUID_INDEX(uid); 149 gid_idx = FUID_INDEX(gid); 150 if (uid_idx) 151 domcnt++; 152 if (gid_idx > 0 && gid_idx != uid_idx) 153 domcnt++; 154 155 return (domcnt); 156} 157 158static void * 159zfs_replay_fuid_domain_common(zfs_fuid_info_t *fuid_infop, void *start, 160 int domcnt) 161{ 162 int i; 163 164 for (i = 0; i != domcnt; i++) { 165 fuid_infop->z_domain_table[i] = start; 166 start = (caddr_t)start + strlen(start) + 1; 167 } 168 169 return (start); 170} 171 172/* 173 * Set the uid/gid in the fuid_info structure. 174 */ 175static void 176zfs_replay_fuid_ugid(zfs_fuid_info_t *fuid_infop, uint64_t uid, uint64_t gid) 177{ 178 /* 179 * If owner or group are log specific FUIDs then slurp up 180 * domain information and build zfs_fuid_info_t 181 */ 182 if (IS_EPHEMERAL(uid)) 183 fuid_infop->z_fuid_owner = uid; 184 185 if (IS_EPHEMERAL(gid)) 186 fuid_infop->z_fuid_group = gid; 187} 188 189/* 190 * Load fuid domains into fuid_info_t 191 */ 192static zfs_fuid_info_t * 193zfs_replay_fuid_domain(void *buf, void **end, uint64_t uid, uint64_t gid) 194{ 195 int domcnt; 196 197 zfs_fuid_info_t *fuid_infop; 198 199 fuid_infop = zfs_fuid_info_alloc(); 200 201 domcnt = zfs_replay_domain_cnt(uid, gid); 202 203 if (domcnt == 0) 204 return (fuid_infop); 205 206 fuid_infop->z_domain_table = 207 kmem_zalloc(domcnt * sizeof (char **), KM_SLEEP); 208 209 zfs_replay_fuid_ugid(fuid_infop, uid, gid); 210 211 fuid_infop->z_domain_cnt = domcnt; 212 *end = zfs_replay_fuid_domain_common(fuid_infop, buf, domcnt); 213 return (fuid_infop); 214} 215 216/* 217 * load zfs_fuid_t's and fuid_domains into fuid_info_t 218 */ 219static zfs_fuid_info_t * 220zfs_replay_fuids(void *start, void **end, int idcnt, int domcnt, uint64_t uid, 221 uint64_t gid) 222{ 223 uint64_t *log_fuid = (uint64_t *)start; 224 zfs_fuid_info_t *fuid_infop; 225 int i; 226 227 fuid_infop = zfs_fuid_info_alloc(); 228 fuid_infop->z_domain_cnt = domcnt; 229 230 fuid_infop->z_domain_table = 231 kmem_zalloc(domcnt * sizeof (char **), KM_SLEEP); 232 233 for (i = 0; i != idcnt; i++) { 234 zfs_fuid_t *zfuid; 235 236 zfuid = kmem_alloc(sizeof (zfs_fuid_t), KM_SLEEP); 237 zfuid->z_logfuid = *log_fuid; 238 zfuid->z_id = -1; 239 zfuid->z_domidx = 0; 240 list_insert_tail(&fuid_infop->z_fuids, zfuid); 241 log_fuid++; 242 } 243 244 zfs_replay_fuid_ugid(fuid_infop, uid, gid); 245 246 *end = zfs_replay_fuid_domain_common(fuid_infop, log_fuid, domcnt); 247 return (fuid_infop); 248} 249 250static void 251zfs_replay_swap_attrs(lr_attr_t *lrattr) 252{ 253 /* swap the lr_attr structure */ 254 byteswap_uint32_array(lrattr, sizeof (*lrattr)); 255 /* swap the bitmap */ 256 byteswap_uint32_array(lrattr + 1, (lrattr->lr_attr_masksize - 1) * 257 sizeof (uint32_t)); 258 /* swap the attributes, create time + 64 bit word for attributes */ 259 byteswap_uint64_array((caddr_t)(lrattr + 1) + (sizeof (uint32_t) * 260 (lrattr->lr_attr_masksize - 1)), 3 * sizeof (uint64_t)); 261} 262 263/* 264 * Replay file create with optional ACL, xvattr information as well 265 * as option FUID information. 266 */ 267static int 268zfs_replay_create_acl(zfsvfs_t *zfsvfs, 269 lr_acl_create_t *lracl, boolean_t byteswap) 270{ 271 char *name = NULL; /* location determined later */ 272 lr_create_t *lr = (lr_create_t *)lracl; 273 znode_t *dzp; 274 vnode_t *vp = NULL; 275 xvattr_t xva; 276 int vflg = 0; 277 vsecattr_t vsec = { 0 }; 278 lr_attr_t *lrattr; 279 void *aclstart; 280 void *fuidstart; 281 size_t xvatlen = 0; 282 uint64_t txtype; 283 int error; 284 285 txtype = (lr->lr_common.lrc_txtype & ~TX_CI); 286 if (byteswap) { 287 byteswap_uint64_array(lracl, sizeof (*lracl)); 288 if (txtype == TX_CREATE_ACL_ATTR || 289 txtype == TX_MKDIR_ACL_ATTR) { 290 lrattr = (lr_attr_t *)(caddr_t)(lracl + 1); 291 zfs_replay_swap_attrs(lrattr); 292 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); 293 } 294 295 aclstart = (caddr_t)(lracl + 1) + xvatlen; 296 zfs_ace_byteswap(aclstart, lracl->lr_acl_bytes, B_FALSE); 297 /* swap fuids */ 298 if (lracl->lr_fuidcnt) { 299 byteswap_uint64_array((caddr_t)aclstart + 300 ZIL_ACE_LENGTH(lracl->lr_acl_bytes), 301 lracl->lr_fuidcnt * sizeof (uint64_t)); 302 } 303 } 304 305 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0) 306 return (error); 307 308 xva_init(&xva); 309 zfs_init_vattr(&xva.xva_vattr, AT_TYPE | AT_MODE | AT_UID | AT_GID, 310 lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, lr->lr_foid); 311 312 /* 313 * All forms of zfs create (create, mkdir, mkxattrdir, symlink) 314 * eventually end up in zfs_mknode(), which assigns the object's 315 * creation time and generation number. The generic VOP_CREATE() 316 * doesn't have either concept, so we smuggle the values inside 317 * the vattr's otherwise unused va_ctime and va_nblocks fields. 318 */ 319 ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime); 320 xva.xva_vattr.va_nblocks = lr->lr_gen; 321 322 error = dmu_object_info(zfsvfs->z_os, lr->lr_foid, NULL); 323 if (error != ENOENT) 324 goto bail; 325 326 if (lr->lr_common.lrc_txtype & TX_CI) 327 vflg |= FIGNORECASE; 328 switch (txtype) { 329 case TX_CREATE_ACL: 330 aclstart = (caddr_t)(lracl + 1); 331 fuidstart = (caddr_t)aclstart + 332 ZIL_ACE_LENGTH(lracl->lr_acl_bytes); 333 zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart, 334 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt, 335 lr->lr_uid, lr->lr_gid); 336 /*FALLTHROUGH*/ 337 case TX_CREATE_ACL_ATTR: 338 if (name == NULL) { 339 lrattr = (lr_attr_t *)(caddr_t)(lracl + 1); 340 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); 341 xva.xva_vattr.va_mask |= AT_XVATTR; 342 zfs_replay_xvattr(lrattr, &xva); 343 } 344 vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS; 345 vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen; 346 vsec.vsa_aclcnt = lracl->lr_aclcnt; 347 vsec.vsa_aclentsz = lracl->lr_acl_bytes; 348 vsec.vsa_aclflags = lracl->lr_acl_flags; 349 if (zfsvfs->z_fuid_replay == NULL) { 350 fuidstart = (caddr_t)(lracl + 1) + xvatlen + 351 ZIL_ACE_LENGTH(lracl->lr_acl_bytes); 352 zfsvfs->z_fuid_replay = 353 zfs_replay_fuids(fuidstart, 354 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt, 355 lr->lr_uid, lr->lr_gid); 356 } 357 358#ifdef TODO 359 error = VOP_CREATE(ZTOV(dzp), name, &xva.xva_vattr, 360 0, 0, &vp, kcred, vflg, NULL, &vsec); 361#else 362 panic("%s:%u: unsupported condition", __func__, __LINE__); 363#endif 364 break; 365 case TX_MKDIR_ACL: 366 aclstart = (caddr_t)(lracl + 1); 367 fuidstart = (caddr_t)aclstart + 368 ZIL_ACE_LENGTH(lracl->lr_acl_bytes); 369 zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart, 370 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt, 371 lr->lr_uid, lr->lr_gid); 372 /*FALLTHROUGH*/ 373 case TX_MKDIR_ACL_ATTR: 374 if (name == NULL) { 375 lrattr = (lr_attr_t *)(caddr_t)(lracl + 1); 376 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); 377 zfs_replay_xvattr(lrattr, &xva); 378 } 379 vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS; 380 vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen; 381 vsec.vsa_aclcnt = lracl->lr_aclcnt; 382 vsec.vsa_aclentsz = lracl->lr_acl_bytes; 383 vsec.vsa_aclflags = lracl->lr_acl_flags; 384 if (zfsvfs->z_fuid_replay == NULL) { 385 fuidstart = (caddr_t)(lracl + 1) + xvatlen + 386 ZIL_ACE_LENGTH(lracl->lr_acl_bytes); 387 zfsvfs->z_fuid_replay = 388 zfs_replay_fuids(fuidstart, 389 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt, 390 lr->lr_uid, lr->lr_gid); 391 } 392#ifdef TODO 393 error = VOP_MKDIR(ZTOV(dzp), name, &xva.xva_vattr, 394 &vp, kcred, NULL, vflg, &vsec); 395#else 396 panic("%s:%u: unsupported condition", __func__, __LINE__); 397#endif 398 break; 399 default: 400 error = SET_ERROR(ENOTSUP); 401 } 402 403bail: 404 if (error == 0 && vp != NULL) 405 VN_RELE(vp); 406 407 VN_RELE(ZTOV(dzp)); 408 409 if (zfsvfs->z_fuid_replay) 410 zfs_fuid_info_free(zfsvfs->z_fuid_replay); 411 zfsvfs->z_fuid_replay = NULL; 412 413 return (error); 414} 415 416static int 417zfs_replay_create(zfsvfs_t *zfsvfs, lr_create_t *lr, boolean_t byteswap) 418{ 419 char *name = NULL; /* location determined later */ 420 char *link; /* symlink content follows name */ 421 znode_t *dzp; 422 vnode_t *vp = NULL; 423 xvattr_t xva; 424 int vflg = 0; 425 size_t lrsize = sizeof (lr_create_t); 426 lr_attr_t *lrattr; 427 void *start; 428 size_t xvatlen; 429 uint64_t txtype; 430 struct componentname cn; 431 int error; 432 433 txtype = (lr->lr_common.lrc_txtype & ~TX_CI); 434 if (byteswap) { 435 byteswap_uint64_array(lr, sizeof (*lr)); 436 if (txtype == TX_CREATE_ATTR || txtype == TX_MKDIR_ATTR) 437 zfs_replay_swap_attrs((lr_attr_t *)(lr + 1)); 438 } 439 440 441 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0) 442 return (error); 443 444 xva_init(&xva); 445 zfs_init_vattr(&xva.xva_vattr, AT_TYPE | AT_MODE | AT_UID | AT_GID, 446 lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, lr->lr_foid); 447 448 /* 449 * All forms of zfs create (create, mkdir, mkxattrdir, symlink) 450 * eventually end up in zfs_mknode(), which assigns the object's 451 * creation time and generation number. The generic VOP_CREATE() 452 * doesn't have either concept, so we smuggle the values inside 453 * the vattr's otherwise unused va_ctime and va_nblocks fields. 454 */ 455 ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime); 456 xva.xva_vattr.va_nblocks = lr->lr_gen; 457 458 error = dmu_object_info(zfsvfs->z_os, lr->lr_foid, NULL); 459 if (error != ENOENT) 460 goto out; 461 462 if (lr->lr_common.lrc_txtype & TX_CI) 463 vflg |= FIGNORECASE; 464 465 /* 466 * Symlinks don't have fuid info, and CIFS never creates 467 * symlinks. 468 * 469 * The _ATTR versions will grab the fuid info in their subcases. 470 */ 471 if ((int)lr->lr_common.lrc_txtype != TX_SYMLINK && 472 (int)lr->lr_common.lrc_txtype != TX_MKDIR_ATTR && 473 (int)lr->lr_common.lrc_txtype != TX_CREATE_ATTR) { 474 start = (lr + 1); 475 zfsvfs->z_fuid_replay = 476 zfs_replay_fuid_domain(start, &start, 477 lr->lr_uid, lr->lr_gid); 478 } 479 480 cn.cn_cred = kcred; 481 cn.cn_thread = curthread; 482 cn.cn_flags = SAVENAME; 483 484 vn_lock(ZTOV(dzp), LK_EXCLUSIVE | LK_RETRY); 485 switch (txtype) { 486 case TX_CREATE_ATTR: 487 lrattr = (lr_attr_t *)(caddr_t)(lr + 1); 488 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); 489 zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva); 490 start = (caddr_t)(lr + 1) + xvatlen; 491 zfsvfs->z_fuid_replay = 492 zfs_replay_fuid_domain(start, &start, 493 lr->lr_uid, lr->lr_gid); 494 name = (char *)start; 495 496 /*FALLTHROUGH*/ 497 case TX_CREATE: 498 if (name == NULL) 499 name = (char *)start; 500 501 cn.cn_nameptr = name; 502 error = VOP_CREATE(ZTOV(dzp), &vp, &cn, &xva.xva_vattr /*,vflg*/); 503 break; 504 case TX_MKDIR_ATTR: 505 lrattr = (lr_attr_t *)(caddr_t)(lr + 1); 506 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); 507 zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva); 508 start = (caddr_t)(lr + 1) + xvatlen; 509 zfsvfs->z_fuid_replay = 510 zfs_replay_fuid_domain(start, &start, 511 lr->lr_uid, lr->lr_gid); 512 name = (char *)start; 513 514 /*FALLTHROUGH*/ 515 case TX_MKDIR: 516 if (name == NULL) 517 name = (char *)(lr + 1); 518 519 cn.cn_nameptr = name; 520 error = VOP_MKDIR(ZTOV(dzp), &vp, &cn, &xva.xva_vattr /*,vflg*/); 521 break; 522 case TX_MKXATTR: 523 error = zfs_make_xattrdir(dzp, &xva.xva_vattr, &vp, kcred); 524 break; 525 case TX_SYMLINK: 526 name = (char *)(lr + 1); 527 link = name + strlen(name) + 1; 528 cn.cn_nameptr = name; 529 error = VOP_SYMLINK(ZTOV(dzp), &vp, &cn, &xva.xva_vattr, link /*,vflg*/); 530 break; 531 default: 532 error = SET_ERROR(ENOTSUP); 533 } 534 VOP_UNLOCK(ZTOV(dzp), 0); 535 536out: 537 if (error == 0 && vp != NULL) 538 VN_URELE(vp); 539 540 VN_RELE(ZTOV(dzp)); 541 542 if (zfsvfs->z_fuid_replay) 543 zfs_fuid_info_free(zfsvfs->z_fuid_replay); 544 zfsvfs->z_fuid_replay = NULL; 545 return (error); 546} 547 548static int 549zfs_replay_remove(zfsvfs_t *zfsvfs, lr_remove_t *lr, boolean_t byteswap) 550{ 551 char *name = (char *)(lr + 1); /* name follows lr_remove_t */ 552 znode_t *dzp; 553 struct componentname cn; 554 vnode_t *vp; 555 int error; 556 int vflg = 0; 557 558 if (byteswap) 559 byteswap_uint64_array(lr, sizeof (*lr)); 560 561 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0) 562 return (error); 563 564 if (lr->lr_common.lrc_txtype & TX_CI) 565 vflg |= FIGNORECASE; 566 cn.cn_nameptr = name; 567 cn.cn_namelen = strlen(name); 568 cn.cn_nameiop = DELETE; 569 cn.cn_flags = ISLASTCN | SAVENAME; 570 cn.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 571 cn.cn_cred = kcred; 572 cn.cn_thread = curthread; 573 vn_lock(ZTOV(dzp), LK_EXCLUSIVE | LK_RETRY); 574 error = VOP_LOOKUP(ZTOV(dzp), &vp, &cn); 575 if (error != 0) { 576 VOP_UNLOCK(ZTOV(dzp), 0); 577 goto fail; 578 } 579 580 switch ((int)lr->lr_common.lrc_txtype) { 581 case TX_REMOVE: 582 error = VOP_REMOVE(ZTOV(dzp), vp, &cn /*,vflg*/); 583 break; 584 case TX_RMDIR: 585 error = VOP_RMDIR(ZTOV(dzp), vp, &cn /*,vflg*/); 586 break; 587 default: 588 error = SET_ERROR(ENOTSUP); 589 } 590 vput(vp); 591 VOP_UNLOCK(ZTOV(dzp), 0); 592 593fail: 594 VN_RELE(ZTOV(dzp)); 595 596 return (error); 597} 598 599static int 600zfs_replay_link(zfsvfs_t *zfsvfs, lr_link_t *lr, boolean_t byteswap) 601{ 602 char *name = (char *)(lr + 1); /* name follows lr_link_t */ 603 znode_t *dzp, *zp; 604 struct componentname cn; 605 int error; 606 int vflg = 0; 607 608 if (byteswap) 609 byteswap_uint64_array(lr, sizeof (*lr)); 610 611 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0) 612 return (error); 613 614 if ((error = zfs_zget(zfsvfs, lr->lr_link_obj, &zp)) != 0) { 615 VN_RELE(ZTOV(dzp)); 616 return (error); 617 } 618 619 if (lr->lr_common.lrc_txtype & TX_CI) 620 vflg |= FIGNORECASE; 621 622 cn.cn_nameptr = name; 623 cn.cn_cred = kcred; 624 cn.cn_thread = curthread; 625 cn.cn_flags = SAVENAME; 626 627 vn_lock(ZTOV(dzp), LK_EXCLUSIVE | LK_RETRY); 628 vn_lock(ZTOV(zp), LK_EXCLUSIVE | LK_RETRY); 629 error = VOP_LINK(ZTOV(dzp), ZTOV(zp), &cn /*,vflg*/); 630 VOP_UNLOCK(ZTOV(zp), 0); 631 VOP_UNLOCK(ZTOV(dzp), 0); 632 633 VN_RELE(ZTOV(zp)); 634 VN_RELE(ZTOV(dzp)); 635 636 return (error); 637} 638 639static int 640zfs_replay_rename(zfsvfs_t *zfsvfs, lr_rename_t *lr, boolean_t byteswap) 641{ 642 char *sname = (char *)(lr + 1); /* sname and tname follow lr_rename_t */ 643 char *tname = sname + strlen(sname) + 1; 644 znode_t *sdzp, *tdzp; 645 struct componentname scn, tcn; 646 vnode_t *svp, *tvp; 647 kthread_t *td = curthread; 648 int error; 649 int vflg = 0; 650 651 if (byteswap) 652 byteswap_uint64_array(lr, sizeof (*lr)); 653 654 if ((error = zfs_zget(zfsvfs, lr->lr_sdoid, &sdzp)) != 0) 655 return (error); 656 657 if ((error = zfs_zget(zfsvfs, lr->lr_tdoid, &tdzp)) != 0) { 658 VN_RELE(ZTOV(sdzp)); 659 return (error); 660 } 661 662 if (lr->lr_common.lrc_txtype & TX_CI) 663 vflg |= FIGNORECASE; 664 svp = tvp = NULL; 665 666 scn.cn_nameptr = sname; 667 scn.cn_namelen = strlen(sname); 668 scn.cn_nameiop = DELETE; 669 scn.cn_flags = ISLASTCN | SAVENAME; 670 scn.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 671 scn.cn_cred = kcred; 672 scn.cn_thread = td; 673 vn_lock(ZTOV(sdzp), LK_EXCLUSIVE | LK_RETRY); 674 error = VOP_LOOKUP(ZTOV(sdzp), &svp, &scn); 675 VOP_UNLOCK(ZTOV(sdzp), 0); 676 if (error != 0) 677 goto fail; 678 VOP_UNLOCK(svp, 0); 679 680 tcn.cn_nameptr = tname; 681 tcn.cn_namelen = strlen(tname); 682 tcn.cn_nameiop = RENAME; 683 tcn.cn_flags = ISLASTCN | SAVENAME; 684 tcn.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 685 tcn.cn_cred = kcred; 686 tcn.cn_thread = td; 687 vn_lock(ZTOV(tdzp), LK_EXCLUSIVE | LK_RETRY); 688 error = VOP_LOOKUP(ZTOV(tdzp), &tvp, &tcn); 689 if (error == EJUSTRETURN) 690 tvp = NULL; 691 else if (error != 0) { 692 VOP_UNLOCK(ZTOV(tdzp), 0); 693 goto fail; 694 } 695 696 error = VOP_RENAME(ZTOV(sdzp), svp, &scn, ZTOV(tdzp), tvp, &tcn /*,vflg*/); 697 return (error); 698fail: 699 if (svp != NULL) 700 vrele(svp); 701 if (tvp != NULL) 702 vrele(tvp); 703 VN_RELE(ZTOV(tdzp)); 704 VN_RELE(ZTOV(sdzp)); 705 706 return (error); 707} 708 709static int 710zfs_replay_write(zfsvfs_t *zfsvfs, lr_write_t *lr, boolean_t byteswap) 711{ 712 char *data = (char *)(lr + 1); /* data follows lr_write_t */ 713 znode_t *zp; 714 int error; 715 ssize_t resid; 716 uint64_t eod, offset, length; 717 718 if (byteswap) 719 byteswap_uint64_array(lr, sizeof (*lr)); 720 721 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) { 722 /* 723 * As we can log writes out of order, it's possible the 724 * file has been removed. In this case just drop the write 725 * and return success. 726 */ 727 if (error == ENOENT) 728 error = 0; 729 return (error); 730 } 731 732 offset = lr->lr_offset; 733 length = lr->lr_length; 734 eod = offset + length; /* end of data for this write */ 735 736 /* 737 * This may be a write from a dmu_sync() for a whole block, 738 * and may extend beyond the current end of the file. 739 * We can't just replay what was written for this TX_WRITE as 740 * a future TX_WRITE2 may extend the eof and the data for that 741 * write needs to be there. So we write the whole block and 742 * reduce the eof. This needs to be done within the single dmu 743 * transaction created within vn_rdwr -> zfs_write. So a possible 744 * new end of file is passed through in zfsvfs->z_replay_eof 745 */ 746 747 zfsvfs->z_replay_eof = 0; /* 0 means don't change end of file */ 748 749 /* If it's a dmu_sync() block, write the whole block */ 750 if (lr->lr_common.lrc_reclen == sizeof (lr_write_t)) { 751 uint64_t blocksize = BP_GET_LSIZE(&lr->lr_blkptr); 752 if (length < blocksize) { 753 offset -= offset % blocksize; 754 length = blocksize; 755 } 756 if (zp->z_size < eod) 757 zfsvfs->z_replay_eof = eod; 758 } 759 760 error = vn_rdwr(UIO_WRITE, ZTOV(zp), data, length, offset, 761 UIO_SYSSPACE, 0, RLIM64_INFINITY, kcred, &resid); 762 763 VN_RELE(ZTOV(zp)); 764 zfsvfs->z_replay_eof = 0; /* safety */ 765 766 return (error); 767} 768 769/* 770 * TX_WRITE2 are only generated when dmu_sync() returns EALREADY 771 * meaning the pool block is already being synced. So now that we always write 772 * out full blocks, all we have to do is expand the eof if 773 * the file is grown. 774 */ 775static int 776zfs_replay_write2(zfsvfs_t *zfsvfs, lr_write_t *lr, boolean_t byteswap) 777{ 778 znode_t *zp; 779 int error; 780 uint64_t end; 781 782 if (byteswap) 783 byteswap_uint64_array(lr, sizeof (*lr)); 784 785 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) 786 return (error); 787 788top: 789 end = lr->lr_offset + lr->lr_length; 790 if (end > zp->z_size) { 791 dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 792 793 zp->z_size = end; 794 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 795 error = dmu_tx_assign(tx, TXG_WAIT); 796 if (error) { 797 VN_RELE(ZTOV(zp)); 798 if (error == ERESTART) { 799 dmu_tx_wait(tx); 800 dmu_tx_abort(tx); 801 goto top; 802 } 803 dmu_tx_abort(tx); 804 return (error); 805 } 806 (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs), 807 (void *)&zp->z_size, sizeof (uint64_t), tx); 808 809 /* Ensure the replayed seq is updated */ 810 (void) zil_replaying(zfsvfs->z_log, tx); 811 812 dmu_tx_commit(tx); 813 } 814 815 VN_RELE(ZTOV(zp)); 816 817 return (error); 818} 819 820static int 821zfs_replay_truncate(zfsvfs_t *zfsvfs, lr_truncate_t *lr, boolean_t byteswap) 822{ 823#ifdef sun 824 znode_t *zp; 825 flock64_t fl; 826 int error; 827 828 if (byteswap) 829 byteswap_uint64_array(lr, sizeof (*lr)); 830 831 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) 832 return (error); 833 834 bzero(&fl, sizeof (fl)); 835 fl.l_type = F_WRLCK; 836 fl.l_whence = 0; 837 fl.l_start = lr->lr_offset; 838 fl.l_len = lr->lr_length; 839 840 error = VOP_SPACE(ZTOV(zp), F_FREESP, &fl, FWRITE | FOFFMAX, 841 lr->lr_offset, kcred, NULL); 842 843 VN_RELE(ZTOV(zp)); 844 845 return (error); 846#else /* !sun */ 847 ZFS_LOG(0, "Unexpected code path, report to pjd@FreeBSD.org"); 848 return (EOPNOTSUPP); 849#endif /* !sun */ 850} 851 852static int 853zfs_replay_setattr(zfsvfs_t *zfsvfs, lr_setattr_t *lr, boolean_t byteswap) 854{ 855 znode_t *zp; 856 xvattr_t xva; 857 vattr_t *vap = &xva.xva_vattr; 858 vnode_t *vp; 859 int error; 860 void *start; 861 862 xva_init(&xva); 863 if (byteswap) { 864 byteswap_uint64_array(lr, sizeof (*lr)); 865 866 if ((lr->lr_mask & AT_XVATTR) && 867 zfsvfs->z_version >= ZPL_VERSION_INITIAL) 868 zfs_replay_swap_attrs((lr_attr_t *)(lr + 1)); 869 } 870 871 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) 872 return (error); 873 874 zfs_init_vattr(vap, lr->lr_mask, lr->lr_mode, 875 lr->lr_uid, lr->lr_gid, 0, lr->lr_foid); 876 877 vap->va_size = lr->lr_size; 878 ZFS_TIME_DECODE(&vap->va_atime, lr->lr_atime); 879 ZFS_TIME_DECODE(&vap->va_mtime, lr->lr_mtime); 880 881 /* 882 * Fill in xvattr_t portions if necessary. 883 */ 884 885 start = (lr_setattr_t *)(lr + 1); 886 if (vap->va_mask & AT_XVATTR) { 887 zfs_replay_xvattr((lr_attr_t *)start, &xva); 888 start = (caddr_t)start + 889 ZIL_XVAT_SIZE(((lr_attr_t *)start)->lr_attr_masksize); 890 } else 891 xva.xva_vattr.va_mask &= ~AT_XVATTR; 892 893 zfsvfs->z_fuid_replay = zfs_replay_fuid_domain(start, &start, 894 lr->lr_uid, lr->lr_gid); 895 896 vp = ZTOV(zp); 897 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 898 error = VOP_SETATTR(vp, vap, kcred); 899 VOP_UNLOCK(vp, 0); 900 901 zfs_fuid_info_free(zfsvfs->z_fuid_replay); 902 zfsvfs->z_fuid_replay = NULL; 903 VN_RELE(vp); 904 905 return (error); 906} 907 908extern int zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 909 caller_context_t *ct); 910 911static int 912zfs_replay_acl_v0(zfsvfs_t *zfsvfs, lr_acl_v0_t *lr, boolean_t byteswap) 913{ 914 ace_t *ace = (ace_t *)(lr + 1); /* ace array follows lr_acl_t */ 915 vsecattr_t vsa; 916 vnode_t *vp; 917 znode_t *zp; 918 int error; 919 920 if (byteswap) { 921 byteswap_uint64_array(lr, sizeof (*lr)); 922 zfs_oldace_byteswap(ace, lr->lr_aclcnt); 923 } 924 925 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) 926 return (error); 927 928 bzero(&vsa, sizeof (vsa)); 929 vsa.vsa_mask = VSA_ACE | VSA_ACECNT; 930 vsa.vsa_aclcnt = lr->lr_aclcnt; 931 vsa.vsa_aclentsz = sizeof (ace_t) * vsa.vsa_aclcnt; 932 vsa.vsa_aclflags = 0; 933 vsa.vsa_aclentp = ace; 934 935 vp = ZTOV(zp); 936 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 937 error = zfs_setsecattr(vp, &vsa, 0, kcred, NULL); 938 VOP_UNLOCK(vp, 0); 939 940 VN_RELE(vp); 941 942 return (error); 943} 944 945/* 946 * Replaying ACLs is complicated by FUID support. 947 * The log record may contain some optional data 948 * to be used for replaying FUID's. These pieces 949 * are the actual FUIDs that were created initially. 950 * The FUID table index may no longer be valid and 951 * during zfs_create() a new index may be assigned. 952 * Because of this the log will contain the original 953 * doman+rid in order to create a new FUID. 954 * 955 * The individual ACEs may contain an ephemeral uid/gid which is no 956 * longer valid and will need to be replaced with an actual FUID. 957 * 958 */ 959static int 960zfs_replay_acl(zfsvfs_t *zfsvfs, lr_acl_t *lr, boolean_t byteswap) 961{ 962 ace_t *ace = (ace_t *)(lr + 1); 963 vsecattr_t vsa; 964 znode_t *zp; 965 vnode_t *vp; 966 int error; 967 968 if (byteswap) { 969 byteswap_uint64_array(lr, sizeof (*lr)); 970 zfs_ace_byteswap(ace, lr->lr_acl_bytes, B_FALSE); 971 if (lr->lr_fuidcnt) { 972 byteswap_uint64_array((caddr_t)ace + 973 ZIL_ACE_LENGTH(lr->lr_acl_bytes), 974 lr->lr_fuidcnt * sizeof (uint64_t)); 975 } 976 } 977 978 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) 979 return (error); 980 981 bzero(&vsa, sizeof (vsa)); 982 vsa.vsa_mask = VSA_ACE | VSA_ACECNT | VSA_ACE_ACLFLAGS; 983 vsa.vsa_aclcnt = lr->lr_aclcnt; 984 vsa.vsa_aclentp = ace; 985 vsa.vsa_aclentsz = lr->lr_acl_bytes; 986 vsa.vsa_aclflags = lr->lr_acl_flags; 987 988 if (lr->lr_fuidcnt) { 989 void *fuidstart = (caddr_t)ace + 990 ZIL_ACE_LENGTH(lr->lr_acl_bytes); 991 992 zfsvfs->z_fuid_replay = 993 zfs_replay_fuids(fuidstart, &fuidstart, 994 lr->lr_fuidcnt, lr->lr_domcnt, 0, 0); 995 } 996 997 vp = ZTOV(zp); 998 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 999 error = zfs_setsecattr(vp, &vsa, 0, kcred, NULL); 1000 VOP_UNLOCK(vp, 0); 1001 1002 if (zfsvfs->z_fuid_replay) 1003 zfs_fuid_info_free(zfsvfs->z_fuid_replay); 1004 1005 zfsvfs->z_fuid_replay = NULL; 1006 VN_RELE(vp); 1007 1008 return (error); 1009} 1010 1011/* 1012 * Callback vectors for replaying records 1013 */ 1014zil_replay_func_t *zfs_replay_vector[TX_MAX_TYPE] = { 1015 zfs_replay_error, /* 0 no such transaction type */ 1016 zfs_replay_create, /* TX_CREATE */ 1017 zfs_replay_create, /* TX_MKDIR */ 1018 zfs_replay_create, /* TX_MKXATTR */ 1019 zfs_replay_create, /* TX_SYMLINK */ 1020 zfs_replay_remove, /* TX_REMOVE */ 1021 zfs_replay_remove, /* TX_RMDIR */ 1022 zfs_replay_link, /* TX_LINK */ 1023 zfs_replay_rename, /* TX_RENAME */ 1024 zfs_replay_write, /* TX_WRITE */ 1025 zfs_replay_truncate, /* TX_TRUNCATE */ 1026 zfs_replay_setattr, /* TX_SETATTR */ 1027 zfs_replay_acl_v0, /* TX_ACL_V0 */ 1028 zfs_replay_acl, /* TX_ACL */ 1029 zfs_replay_create_acl, /* TX_CREATE_ACL */ 1030 zfs_replay_create, /* TX_CREATE_ATTR */ 1031 zfs_replay_create_acl, /* TX_CREATE_ACL_ATTR */ 1032 zfs_replay_create_acl, /* TX_MKDIR_ACL */ 1033 zfs_replay_create, /* TX_MKDIR_ATTR */ 1034 zfs_replay_create_acl, /* TX_MKDIR_ACL_ATTR */ 1035 zfs_replay_write2, /* TX_WRITE2 */ 1036}; 1037