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5421 devzvol_readdir() needs to be more careful with strchr
[illumos-gate.git] / usr / src / uts / common / fs / zfs / zfs_replay.c
blob3f98aaed7939cd6b398605f45309d018bb6ae0d6
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 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/thread.h>
33 #include <sys/file.h>
34 #include <sys/fcntl.h>
35 #include <sys/vfs.h>
36 #include <sys/fs/zfs.h>
37 #include <sys/zfs_znode.h>
38 #include <sys/zfs_dir.h>
39 #include <sys/zfs_acl.h>
40 #include <sys/zfs_fuid.h>
41 #include <sys/spa.h>
42 #include <sys/zil.h>
43 #include <sys/byteorder.h>
44 #include <sys/stat.h>
45 #include <sys/mode.h>
46 #include <sys/acl.h>
47 #include <sys/atomic.h>
48 #include <sys/cred.h>
49
50 /*
51 * Functions to replay ZFS intent log (ZIL) records
52 * The functions are called through a function vector (zfs_replay_vector)
53 * which is indexed by the transaction type.
54 */
55
56 static void
57 zfs_init_vattr(vattr_t *vap, uint64_t mask, uint64_t mode,
58 uint64_t uid, uint64_t gid, uint64_t rdev, uint64_t nodeid)
59 {
60 bzero(vap, sizeof (*vap));
61 vap->va_mask = (uint_t)mask;
62 vap->va_type = IFTOVT(mode);
63 vap->va_mode = mode & MODEMASK;
64 vap->va_uid = (uid_t)(IS_EPHEMERAL(uid)) ? -1 : uid;
65 vap->va_gid = (gid_t)(IS_EPHEMERAL(gid)) ? -1 : gid;
66 vap->va_rdev = zfs_cmpldev(rdev);
67 vap->va_nodeid = nodeid;
68 }
69
70 /* ARGSUSED */
71 static int
72 zfs_replay_error(zfsvfs_t *zfsvfs, lr_t *lr, boolean_t byteswap)
73 {
74 return (SET_ERROR(ENOTSUP));
75 }
76
77 static void
78 zfs_replay_xvattr(lr_attr_t *lrattr, xvattr_t *xvap)
79 {
80 xoptattr_t *xoap = NULL;
81 uint64_t *attrs;
82 uint64_t *crtime;
83 uint32_t *bitmap;
84 void *scanstamp;
85 int i;
86
87 xvap->xva_vattr.va_mask |= AT_XVATTR;
88 if ((xoap = xva_getxoptattr(xvap)) == NULL) {
89 xvap->xva_vattr.va_mask &= ~AT_XVATTR; /* shouldn't happen */
90 return;
91 }
92
93 ASSERT(lrattr->lr_attr_masksize == xvap->xva_mapsize);
94
95 bitmap = &lrattr->lr_attr_bitmap;
96 for (i = 0; i != lrattr->lr_attr_masksize; i++, bitmap++)
97 xvap->xva_reqattrmap[i] = *bitmap;
98
99 attrs = (uint64_t *)(lrattr + lrattr->lr_attr_masksize - 1);
100 crtime = attrs + 1;
101 scanstamp = (caddr_t)(crtime + 2);
102
103 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN))
104 xoap->xoa_hidden = ((*attrs & XAT0_HIDDEN) != 0);
105 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM))
106 xoap->xoa_system = ((*attrs & XAT0_SYSTEM) != 0);
107 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE))
108 xoap->xoa_archive = ((*attrs & XAT0_ARCHIVE) != 0);
109 if (XVA_ISSET_REQ(xvap, XAT_READONLY))
110 xoap->xoa_readonly = ((*attrs & XAT0_READONLY) != 0);
111 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE))
112 xoap->xoa_immutable = ((*attrs & XAT0_IMMUTABLE) != 0);
113 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK))
114 xoap->xoa_nounlink = ((*attrs & XAT0_NOUNLINK) != 0);
115 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY))
116 xoap->xoa_appendonly = ((*attrs & XAT0_APPENDONLY) != 0);
117 if (XVA_ISSET_REQ(xvap, XAT_NODUMP))
118 xoap->xoa_nodump = ((*attrs & XAT0_NODUMP) != 0);
119 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE))
120 xoap->xoa_opaque = ((*attrs & XAT0_OPAQUE) != 0);
121 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED))
122 xoap->xoa_av_modified = ((*attrs & XAT0_AV_MODIFIED) != 0);
123 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED))
124 xoap->xoa_av_quarantined =
125 ((*attrs & XAT0_AV_QUARANTINED) != 0);
126 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME))
127 ZFS_TIME_DECODE(&xoap->xoa_createtime, crtime);
128 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
129 bcopy(scanstamp, xoap->xoa_av_scanstamp, AV_SCANSTAMP_SZ);
130 if (XVA_ISSET_REQ(xvap, XAT_REPARSE))
131 xoap->xoa_reparse = ((*attrs & XAT0_REPARSE) != 0);
132 if (XVA_ISSET_REQ(xvap, XAT_OFFLINE))
133 xoap->xoa_offline = ((*attrs & XAT0_OFFLINE) != 0);
134 if (XVA_ISSET_REQ(xvap, XAT_SPARSE))
135 xoap->xoa_sparse = ((*attrs & XAT0_SPARSE) != 0);
136 }
137
138 static int
139 zfs_replay_domain_cnt(uint64_t uid, uint64_t gid)
140 {
141 uint64_t uid_idx;
142 uint64_t gid_idx;
143 int domcnt = 0;
144
145 uid_idx = FUID_INDEX(uid);
146 gid_idx = FUID_INDEX(gid);
147 if (uid_idx)
148 domcnt++;
149 if (gid_idx > 0 && gid_idx != uid_idx)
150 domcnt++;
151
152 return (domcnt);
153 }
154
155 static void *
156 zfs_replay_fuid_domain_common(zfs_fuid_info_t *fuid_infop, void *start,
157 int domcnt)
158 {
159 int i;
160
161 for (i = 0; i != domcnt; i++) {
162 fuid_infop->z_domain_table[i] = start;
163 start = (caddr_t)start + strlen(start) + 1;
164 }
165
166 return (start);
167 }
168
169 /*
170 * Set the uid/gid in the fuid_info structure.
171 */
172 static void
173 zfs_replay_fuid_ugid(zfs_fuid_info_t *fuid_infop, uint64_t uid, uint64_t gid)
174 {
175 /*
176 * If owner or group are log specific FUIDs then slurp up
177 * domain information and build zfs_fuid_info_t
178 */
179 if (IS_EPHEMERAL(uid))
180 fuid_infop->z_fuid_owner = uid;
181
182 if (IS_EPHEMERAL(gid))
183 fuid_infop->z_fuid_group = gid;
184 }
185
186 /*
187 * Load fuid domains into fuid_info_t
188 */
189 static zfs_fuid_info_t *
190 zfs_replay_fuid_domain(void *buf, void **end, uint64_t uid, uint64_t gid)
191 {
192 int domcnt;
193
194 zfs_fuid_info_t *fuid_infop;
195
196 fuid_infop = zfs_fuid_info_alloc();
197
198 domcnt = zfs_replay_domain_cnt(uid, gid);
199
200 if (domcnt == 0)
201 return (fuid_infop);
202
203 fuid_infop->z_domain_table =
204 kmem_zalloc(domcnt * sizeof (char **), KM_SLEEP);
205
206 zfs_replay_fuid_ugid(fuid_infop, uid, gid);
207
208 fuid_infop->z_domain_cnt = domcnt;
209 *end = zfs_replay_fuid_domain_common(fuid_infop, buf, domcnt);
210 return (fuid_infop);
211 }
212
213 /*
214 * load zfs_fuid_t's and fuid_domains into fuid_info_t
215 */
216 static zfs_fuid_info_t *
217 zfs_replay_fuids(void *start, void **end, int idcnt, int domcnt, uint64_t uid,
218 uint64_t gid)
219 {
220 uint64_t *log_fuid = (uint64_t *)start;
221 zfs_fuid_info_t *fuid_infop;
222 int i;
223
224 fuid_infop = zfs_fuid_info_alloc();
225 fuid_infop->z_domain_cnt = domcnt;
226
227 fuid_infop->z_domain_table =
228 kmem_zalloc(domcnt * sizeof (char **), KM_SLEEP);
229
230 for (i = 0; i != idcnt; i++) {
231 zfs_fuid_t *zfuid;
232
233 zfuid = kmem_alloc(sizeof (zfs_fuid_t), KM_SLEEP);
234 zfuid->z_logfuid = *log_fuid;
235 zfuid->z_id = -1;
236 zfuid->z_domidx = 0;
237 list_insert_tail(&fuid_infop->z_fuids, zfuid);
238 log_fuid++;
239 }
240
241 zfs_replay_fuid_ugid(fuid_infop, uid, gid);
242
243 *end = zfs_replay_fuid_domain_common(fuid_infop, log_fuid, domcnt);
244 return (fuid_infop);
245 }
246
247 static void
248 zfs_replay_swap_attrs(lr_attr_t *lrattr)
249 {
250 /* swap the lr_attr structure */
251 byteswap_uint32_array(lrattr, sizeof (*lrattr));
252 /* swap the bitmap */
253 byteswap_uint32_array(lrattr + 1, (lrattr->lr_attr_masksize - 1) *
254 sizeof (uint32_t));
255 /* swap the attributes, create time + 64 bit word for attributes */
256 byteswap_uint64_array((caddr_t)(lrattr + 1) + (sizeof (uint32_t) *
257 (lrattr->lr_attr_masksize - 1)), 3 * sizeof (uint64_t));
258 }
259
260 /*
261 * Replay file create with optional ACL, xvattr information as well
262 * as option FUID information.
263 */
264 static int
265 zfs_replay_create_acl(zfsvfs_t *zfsvfs,
266 lr_acl_create_t *lracl, boolean_t byteswap)
267 {
268 char *name = NULL; /* location determined later */
269 lr_create_t *lr = (lr_create_t *)lracl;
270 znode_t *dzp;
271 vnode_t *vp = NULL;
272 xvattr_t xva;
273 int vflg = 0;
274 vsecattr_t vsec = { 0 };
275 lr_attr_t *lrattr;
276 void *aclstart;
277 void *fuidstart;
278 size_t xvatlen = 0;
279 uint64_t txtype;
280 int error;
281
282 txtype = (lr->lr_common.lrc_txtype & ~TX_CI);
283 if (byteswap) {
284 byteswap_uint64_array(lracl, sizeof (*lracl));
285 if (txtype == TX_CREATE_ACL_ATTR ||
286 txtype == TX_MKDIR_ACL_ATTR) {
287 lrattr = (lr_attr_t *)(caddr_t)(lracl + 1);
288 zfs_replay_swap_attrs(lrattr);
289 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
290 }
291
292 aclstart = (caddr_t)(lracl + 1) + xvatlen;
293 zfs_ace_byteswap(aclstart, lracl->lr_acl_bytes, B_FALSE);
294 /* swap fuids */
295 if (lracl->lr_fuidcnt) {
296 byteswap_uint64_array((caddr_t)aclstart +
297 ZIL_ACE_LENGTH(lracl->lr_acl_bytes),
298 lracl->lr_fuidcnt * sizeof (uint64_t));
299 }
300 }
301
302 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
303 return (error);
304
305 xva_init(&xva);
306 zfs_init_vattr(&xva.xva_vattr, AT_TYPE | AT_MODE | AT_UID | AT_GID,
307 lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, lr->lr_foid);
308
309 /*
310 * All forms of zfs create (create, mkdir, mkxattrdir, symlink)
311 * eventually end up in zfs_mknode(), which assigns the object's
312 * creation time and generation number. The generic VOP_CREATE()
313 * doesn't have either concept, so we smuggle the values inside
314 * the vattr's otherwise unused va_ctime and va_nblocks fields.
315 */
316 ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime);
317 xva.xva_vattr.va_nblocks = lr->lr_gen;
318
319 error = dmu_object_info(zfsvfs->z_os, lr->lr_foid, NULL);
320 if (error != ENOENT)
321 goto bail;
322
323 if (lr->lr_common.lrc_txtype & TX_CI)
324 vflg |= FIGNORECASE;
325 switch (txtype) {
326 case TX_CREATE_ACL:
327 aclstart = (caddr_t)(lracl + 1);
328 fuidstart = (caddr_t)aclstart +
329 ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
330 zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart,
331 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
332 lr->lr_uid, lr->lr_gid);
333 /*FALLTHROUGH*/
334 case TX_CREATE_ACL_ATTR:
335 if (name == NULL) {
336 lrattr = (lr_attr_t *)(caddr_t)(lracl + 1);
337 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
338 xva.xva_vattr.va_mask |= AT_XVATTR;
339 zfs_replay_xvattr(lrattr, &xva);
340 }
341 vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS;
342 vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen;
343 vsec.vsa_aclcnt = lracl->lr_aclcnt;
344 vsec.vsa_aclentsz = lracl->lr_acl_bytes;
345 vsec.vsa_aclflags = lracl->lr_acl_flags;
346 if (zfsvfs->z_fuid_replay == NULL) {
347 fuidstart = (caddr_t)(lracl + 1) + xvatlen +
348 ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
349 zfsvfs->z_fuid_replay =
350 zfs_replay_fuids(fuidstart,
351 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
352 lr->lr_uid, lr->lr_gid);
353 }
354
355 error = VOP_CREATE(ZTOV(dzp), name, &xva.xva_vattr,
356 0, 0, &vp, kcred, vflg, NULL, &vsec);
357 break;
358 case TX_MKDIR_ACL:
359 aclstart = (caddr_t)(lracl + 1);
360 fuidstart = (caddr_t)aclstart +
361 ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
362 zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart,
363 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
364 lr->lr_uid, lr->lr_gid);
365 /*FALLTHROUGH*/
366 case TX_MKDIR_ACL_ATTR:
367 if (name == NULL) {
368 lrattr = (lr_attr_t *)(caddr_t)(lracl + 1);
369 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
370 zfs_replay_xvattr(lrattr, &xva);
371 }
372 vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS;
373 vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen;
374 vsec.vsa_aclcnt = lracl->lr_aclcnt;
375 vsec.vsa_aclentsz = lracl->lr_acl_bytes;
376 vsec.vsa_aclflags = lracl->lr_acl_flags;
377 if (zfsvfs->z_fuid_replay == NULL) {
378 fuidstart = (caddr_t)(lracl + 1) + xvatlen +
379 ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
380 zfsvfs->z_fuid_replay =
381 zfs_replay_fuids(fuidstart,
382 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
383 lr->lr_uid, lr->lr_gid);
384 }
385 error = VOP_MKDIR(ZTOV(dzp), name, &xva.xva_vattr,
386 &vp, kcred, NULL, vflg, &vsec);
387 break;
388 default:
389 error = SET_ERROR(ENOTSUP);
390 }
391
392 bail:
393 if (error == 0 && vp != NULL)
394 VN_RELE(vp);
395
396 VN_RELE(ZTOV(dzp));
397
398 if (zfsvfs->z_fuid_replay)
399 zfs_fuid_info_free(zfsvfs->z_fuid_replay);
400 zfsvfs->z_fuid_replay = NULL;
401
402 return (error);
403 }
404
405 static int
406 zfs_replay_create(zfsvfs_t *zfsvfs, lr_create_t *lr, boolean_t byteswap)
407 {
408 char *name = NULL; /* location determined later */
409 char *link; /* symlink content follows name */
410 znode_t *dzp;
411 vnode_t *vp = NULL;
412 xvattr_t xva;
413 int vflg = 0;
414 size_t lrsize = sizeof (lr_create_t);
415 lr_attr_t *lrattr;
416 void *start;
417 size_t xvatlen;
418 uint64_t txtype;
419 int error;
420
421 txtype = (lr->lr_common.lrc_txtype & ~TX_CI);
422 if (byteswap) {
423 byteswap_uint64_array(lr, sizeof (*lr));
424 if (txtype == TX_CREATE_ATTR || txtype == TX_MKDIR_ATTR)
425 zfs_replay_swap_attrs((lr_attr_t *)(lr + 1));
426 }
427
428
429 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
430 return (error);
431
432 xva_init(&xva);
433 zfs_init_vattr(&xva.xva_vattr, AT_TYPE | AT_MODE | AT_UID | AT_GID,
434 lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, lr->lr_foid);
435
436 /*
437 * All forms of zfs create (create, mkdir, mkxattrdir, symlink)
438 * eventually end up in zfs_mknode(), which assigns the object's
439 * creation time and generation number. The generic VOP_CREATE()
440 * doesn't have either concept, so we smuggle the values inside
441 * the vattr's otherwise unused va_ctime and va_nblocks fields.
442 */
443 ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime);
444 xva.xva_vattr.va_nblocks = lr->lr_gen;
445
446 error = dmu_object_info(zfsvfs->z_os, lr->lr_foid, NULL);
447 if (error != ENOENT)
448 goto out;
449
450 if (lr->lr_common.lrc_txtype & TX_CI)
451 vflg |= FIGNORECASE;
452
453 /*
454 * Symlinks don't have fuid info, and CIFS never creates
455 * symlinks.
456 *
457 * The _ATTR versions will grab the fuid info in their subcases.
458 */
459 if ((int)lr->lr_common.lrc_txtype != TX_SYMLINK &&
460 (int)lr->lr_common.lrc_txtype != TX_MKDIR_ATTR &&
461 (int)lr->lr_common.lrc_txtype != TX_CREATE_ATTR) {
462 start = (lr + 1);
463 zfsvfs->z_fuid_replay =
464 zfs_replay_fuid_domain(start, &start,
465 lr->lr_uid, lr->lr_gid);
466 }
467
468 switch (txtype) {
469 case TX_CREATE_ATTR:
470 lrattr = (lr_attr_t *)(caddr_t)(lr + 1);
471 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
472 zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva);
473 start = (caddr_t)(lr + 1) + xvatlen;
474 zfsvfs->z_fuid_replay =
475 zfs_replay_fuid_domain(start, &start,
476 lr->lr_uid, lr->lr_gid);
477 name = (char *)start;
478
479 /*FALLTHROUGH*/
480 case TX_CREATE:
481 if (name == NULL)
482 name = (char *)start;
483
484 error = VOP_CREATE(ZTOV(dzp), name, &xva.xva_vattr,
485 0, 0, &vp, kcred, vflg, NULL, NULL);
486 break;
487 case TX_MKDIR_ATTR:
488 lrattr = (lr_attr_t *)(caddr_t)(lr + 1);
489 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
490 zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva);
491 start = (caddr_t)(lr + 1) + xvatlen;
492 zfsvfs->z_fuid_replay =
493 zfs_replay_fuid_domain(start, &start,
494 lr->lr_uid, lr->lr_gid);
495 name = (char *)start;
496
497 /*FALLTHROUGH*/
498 case TX_MKDIR:
499 if (name == NULL)
500 name = (char *)(lr + 1);
501
502 error = VOP_MKDIR(ZTOV(dzp), name, &xva.xva_vattr,
503 &vp, kcred, NULL, vflg, NULL);
504 break;
505 case TX_MKXATTR:
506 error = zfs_make_xattrdir(dzp, &xva.xva_vattr, &vp, kcred);
507 break;
508 case TX_SYMLINK:
509 name = (char *)(lr + 1);
510 link = name + strlen(name) + 1;
511 error = VOP_SYMLINK(ZTOV(dzp), name, &xva.xva_vattr,
512 link, kcred, NULL, vflg);
513 break;
514 default:
515 error = SET_ERROR(ENOTSUP);
516 }
517
518 out:
519 if (error == 0 && vp != NULL)
520 VN_RELE(vp);
521
522 VN_RELE(ZTOV(dzp));
523
524 if (zfsvfs->z_fuid_replay)
525 zfs_fuid_info_free(zfsvfs->z_fuid_replay);
526 zfsvfs->z_fuid_replay = NULL;
527 return (error);
528 }
529
530 static int
531 zfs_replay_remove(zfsvfs_t *zfsvfs, lr_remove_t *lr, boolean_t byteswap)
532 {
533 char *name = (char *)(lr + 1); /* name follows lr_remove_t */
534 znode_t *dzp;
535 int error;
536 int vflg = 0;
537
538 if (byteswap)
539 byteswap_uint64_array(lr, sizeof (*lr));
540
541 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
542 return (error);
543
544 if (lr->lr_common.lrc_txtype & TX_CI)
545 vflg |= FIGNORECASE;
546
547 switch ((int)lr->lr_common.lrc_txtype) {
548 case TX_REMOVE:
549 error = VOP_REMOVE(ZTOV(dzp), name, kcred, NULL, vflg);
550 break;
551 case TX_RMDIR:
552 error = VOP_RMDIR(ZTOV(dzp), name, NULL, kcred, NULL, vflg);
553 break;
554 default:
555 error = SET_ERROR(ENOTSUP);
556 }
557
558 VN_RELE(ZTOV(dzp));
559
560 return (error);
561 }
562
563 static int
564 zfs_replay_link(zfsvfs_t *zfsvfs, lr_link_t *lr, boolean_t byteswap)
565 {
566 char *name = (char *)(lr + 1); /* name follows lr_link_t */
567 znode_t *dzp, *zp;
568 int error;
569 int vflg = 0;
570
571 if (byteswap)
572 byteswap_uint64_array(lr, sizeof (*lr));
573
574 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
575 return (error);
576
577 if ((error = zfs_zget(zfsvfs, lr->lr_link_obj, &zp)) != 0) {
578 VN_RELE(ZTOV(dzp));
579 return (error);
580 }
581
582 if (lr->lr_common.lrc_txtype & TX_CI)
583 vflg |= FIGNORECASE;
584
585 error = VOP_LINK(ZTOV(dzp), ZTOV(zp), name, kcred, NULL, vflg);
586
587 VN_RELE(ZTOV(zp));
588 VN_RELE(ZTOV(dzp));
589
590 return (error);
591 }
592
593 static int
594 zfs_replay_rename(zfsvfs_t *zfsvfs, lr_rename_t *lr, boolean_t byteswap)
595 {
596 char *sname = (char *)(lr + 1); /* sname and tname follow lr_rename_t */
597 char *tname = sname + strlen(sname) + 1;
598 znode_t *sdzp, *tdzp;
599 int error;
600 int vflg = 0;
601
602 if (byteswap)
603 byteswap_uint64_array(lr, sizeof (*lr));
604
605 if ((error = zfs_zget(zfsvfs, lr->lr_sdoid, &sdzp)) != 0)
606 return (error);
607
608 if ((error = zfs_zget(zfsvfs, lr->lr_tdoid, &tdzp)) != 0) {
609 VN_RELE(ZTOV(sdzp));
610 return (error);
611 }
612
613 if (lr->lr_common.lrc_txtype & TX_CI)
614 vflg |= FIGNORECASE;
615
616 error = VOP_RENAME(ZTOV(sdzp), sname, ZTOV(tdzp), tname, kcred,
617 NULL, vflg);
618
619 VN_RELE(ZTOV(tdzp));
620 VN_RELE(ZTOV(sdzp));
621
622 return (error);
623 }
624
625 static int
626 zfs_replay_write(zfsvfs_t *zfsvfs, lr_write_t *lr, boolean_t byteswap)
627 {
628 char *data = (char *)(lr + 1); /* data follows lr_write_t */
629 znode_t *zp;
630 int error;
631 ssize_t resid;
632 uint64_t eod, offset, length;
633
634 if (byteswap)
635 byteswap_uint64_array(lr, sizeof (*lr));
636
637 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) {
638 /*
639 * As we can log writes out of order, it's possible the
640 * file has been removed. In this case just drop the write
641 * and return success.
642 */
643 if (error == ENOENT)
644 error = 0;
645 return (error);
646 }
647
648 offset = lr->lr_offset;
649 length = lr->lr_length;
650 eod = offset + length; /* end of data for this write */
651
652 /*
653 * This may be a write from a dmu_sync() for a whole block,
654 * and may extend beyond the current end of the file.
655 * We can't just replay what was written for this TX_WRITE as
656 * a future TX_WRITE2 may extend the eof and the data for that
657 * write needs to be there. So we write the whole block and
658 * reduce the eof. This needs to be done within the single dmu
659 * transaction created within vn_rdwr -> zfs_write. So a possible
660 * new end of file is passed through in zfsvfs->z_replay_eof
661 */
662
663 zfsvfs->z_replay_eof = 0; /* 0 means don't change end of file */
664
665 /* If it's a dmu_sync() block, write the whole block */
666 if (lr->lr_common.lrc_reclen == sizeof (lr_write_t)) {
667 uint64_t blocksize = BP_GET_LSIZE(&lr->lr_blkptr);
668 if (length < blocksize) {
669 offset -= offset % blocksize;
670 length = blocksize;
671 }
672 if (zp->z_size < eod)
673 zfsvfs->z_replay_eof = eod;
674 }
675
676 error = vn_rdwr(UIO_WRITE, ZTOV(zp), data, length, offset,
677 UIO_SYSSPACE, 0, RLIM64_INFINITY, kcred, &resid);
678
679 VN_RELE(ZTOV(zp));
680 zfsvfs->z_replay_eof = 0; /* safety */
681
682 return (error);
683 }
684
685 /*
686 * TX_WRITE2 are only generated when dmu_sync() returns EALREADY
687 * meaning the pool block is already being synced. So now that we always write
688 * out full blocks, all we have to do is expand the eof if
689 * the file is grown.
690 */
691 static int
692 zfs_replay_write2(zfsvfs_t *zfsvfs, lr_write_t *lr, boolean_t byteswap)
693 {
694 znode_t *zp;
695 int error;
696 uint64_t end;
697
698 if (byteswap)
699 byteswap_uint64_array(lr, sizeof (*lr));
700
701 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
702 return (error);
703
704 top:
705 end = lr->lr_offset + lr->lr_length;
706 if (end > zp->z_size) {
707 dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
708
709 zp->z_size = end;
710 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
711 error = dmu_tx_assign(tx, TXG_WAIT);
712 if (error) {
713 VN_RELE(ZTOV(zp));
714 if (error == ERESTART) {
715 dmu_tx_wait(tx);
716 dmu_tx_abort(tx);
717 goto top;
718 }
719 dmu_tx_abort(tx);
720 return (error);
721 }
722 (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
723 (void *)&zp->z_size, sizeof (uint64_t), tx);
724
725 /* Ensure the replayed seq is updated */
726 (void) zil_replaying(zfsvfs->z_log, tx);
727
728 dmu_tx_commit(tx);
729 }
730
731 VN_RELE(ZTOV(zp));
732
733 return (error);
734 }
735
736 static int
737 zfs_replay_truncate(zfsvfs_t *zfsvfs, lr_truncate_t *lr, boolean_t byteswap)
738 {
739 znode_t *zp;
740 flock64_t fl;
741 int error;
742
743 if (byteswap)
744 byteswap_uint64_array(lr, sizeof (*lr));
745
746 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
747 return (error);
748
749 bzero(&fl, sizeof (fl));
750 fl.l_type = F_WRLCK;
751 fl.l_whence = 0;
752 fl.l_start = lr->lr_offset;
753 fl.l_len = lr->lr_length;
754
755 error = VOP_SPACE(ZTOV(zp), F_FREESP, &fl, FWRITE | FOFFMAX,
756 lr->lr_offset, kcred, NULL);
757
758 VN_RELE(ZTOV(zp));
759
760 return (error);
761 }
762
763 static int
764 zfs_replay_setattr(zfsvfs_t *zfsvfs, lr_setattr_t *lr, boolean_t byteswap)
765 {
766 znode_t *zp;
767 xvattr_t xva;
768 vattr_t *vap = &xva.xva_vattr;
769 int error;
770 void *start;
771
772 xva_init(&xva);
773 if (byteswap) {
774 byteswap_uint64_array(lr, sizeof (*lr));
775
776 if ((lr->lr_mask & AT_XVATTR) &&
777 zfsvfs->z_version >= ZPL_VERSION_INITIAL)
778 zfs_replay_swap_attrs((lr_attr_t *)(lr + 1));
779 }
780
781 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
782 return (error);
783
784 zfs_init_vattr(vap, lr->lr_mask, lr->lr_mode,
785 lr->lr_uid, lr->lr_gid, 0, lr->lr_foid);
786
787 vap->va_size = lr->lr_size;
788 ZFS_TIME_DECODE(&vap->va_atime, lr->lr_atime);
789 ZFS_TIME_DECODE(&vap->va_mtime, lr->lr_mtime);
790
791 /*
792 * Fill in xvattr_t portions if necessary.
793 */
794
795 start = (lr_setattr_t *)(lr + 1);
796 if (vap->va_mask & AT_XVATTR) {
797 zfs_replay_xvattr((lr_attr_t *)start, &xva);
798 start = (caddr_t)start +
799 ZIL_XVAT_SIZE(((lr_attr_t *)start)->lr_attr_masksize);
800 } else
801 xva.xva_vattr.va_mask &= ~AT_XVATTR;
802
803 zfsvfs->z_fuid_replay = zfs_replay_fuid_domain(start, &start,
804 lr->lr_uid, lr->lr_gid);
805
806 error = VOP_SETATTR(ZTOV(zp), vap, 0, kcred, NULL);
807
808 zfs_fuid_info_free(zfsvfs->z_fuid_replay);
809 zfsvfs->z_fuid_replay = NULL;
810 VN_RELE(ZTOV(zp));
811
812 return (error);
813 }
814
815 static int
816 zfs_replay_acl_v0(zfsvfs_t *zfsvfs, lr_acl_v0_t *lr, boolean_t byteswap)
817 {
818 ace_t *ace = (ace_t *)(lr + 1); /* ace array follows lr_acl_t */
819 vsecattr_t vsa;
820 znode_t *zp;
821 int error;
822
823 if (byteswap) {
824 byteswap_uint64_array(lr, sizeof (*lr));
825 zfs_oldace_byteswap(ace, lr->lr_aclcnt);
826 }
827
828 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
829 return (error);
830
831 bzero(&vsa, sizeof (vsa));
832 vsa.vsa_mask = VSA_ACE | VSA_ACECNT;
833 vsa.vsa_aclcnt = lr->lr_aclcnt;
834 vsa.vsa_aclentsz = sizeof (ace_t) * vsa.vsa_aclcnt;
835 vsa.vsa_aclflags = 0;
836 vsa.vsa_aclentp = ace;
837
838 error = VOP_SETSECATTR(ZTOV(zp), &vsa, 0, kcred, NULL);
839
840 VN_RELE(ZTOV(zp));
841
842 return (error);
843 }
844
845 /*
846 * Replaying ACLs is complicated by FUID support.
847 * The log record may contain some optional data
848 * to be used for replaying FUID's. These pieces
849 * are the actual FUIDs that were created initially.
850 * The FUID table index may no longer be valid and
851 * during zfs_create() a new index may be assigned.
852 * Because of this the log will contain the original
853 * doman+rid in order to create a new FUID.
854 *
855 * The individual ACEs may contain an ephemeral uid/gid which is no
856 * longer valid and will need to be replaced with an actual FUID.
857 *
858 */
859 static int
860 zfs_replay_acl(zfsvfs_t *zfsvfs, lr_acl_t *lr, boolean_t byteswap)
861 {
862 ace_t *ace = (ace_t *)(lr + 1);
863 vsecattr_t vsa;
864 znode_t *zp;
865 int error;
866
867 if (byteswap) {
868 byteswap_uint64_array(lr, sizeof (*lr));
869 zfs_ace_byteswap(ace, lr->lr_acl_bytes, B_FALSE);
870 if (lr->lr_fuidcnt) {
871 byteswap_uint64_array((caddr_t)ace +
872 ZIL_ACE_LENGTH(lr->lr_acl_bytes),
873 lr->lr_fuidcnt * sizeof (uint64_t));
874 }
875 }
876
877 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
878 return (error);
879
880 bzero(&vsa, sizeof (vsa));
881 vsa.vsa_mask = VSA_ACE | VSA_ACECNT | VSA_ACE_ACLFLAGS;
882 vsa.vsa_aclcnt = lr->lr_aclcnt;
883 vsa.vsa_aclentp = ace;
884 vsa.vsa_aclentsz = lr->lr_acl_bytes;
885 vsa.vsa_aclflags = lr->lr_acl_flags;
886
887 if (lr->lr_fuidcnt) {
888 void *fuidstart = (caddr_t)ace +
889 ZIL_ACE_LENGTH(lr->lr_acl_bytes);
890
891 zfsvfs->z_fuid_replay =
892 zfs_replay_fuids(fuidstart, &fuidstart,
893 lr->lr_fuidcnt, lr->lr_domcnt, 0, 0);
894 }
895
896 error = VOP_SETSECATTR(ZTOV(zp), &vsa, 0, kcred, NULL);
897
898 if (zfsvfs->z_fuid_replay)
899 zfs_fuid_info_free(zfsvfs->z_fuid_replay);
900
901 zfsvfs->z_fuid_replay = NULL;
902 VN_RELE(ZTOV(zp));
903
904 return (error);
905 }
906
907 /*
908 * Callback vectors for replaying records
909 */
910 zil_replay_func_t *zfs_replay_vector[TX_MAX_TYPE] = {
911 zfs_replay_error, /* 0 no such transaction type */
912 zfs_replay_create, /* TX_CREATE */
913 zfs_replay_create, /* TX_MKDIR */
914 zfs_replay_create, /* TX_MKXATTR */
915 zfs_replay_create, /* TX_SYMLINK */
916 zfs_replay_remove, /* TX_REMOVE */
917 zfs_replay_remove, /* TX_RMDIR */
918 zfs_replay_link, /* TX_LINK */
919 zfs_replay_rename, /* TX_RENAME */
920 zfs_replay_write, /* TX_WRITE */
921 zfs_replay_truncate, /* TX_TRUNCATE */
922 zfs_replay_setattr, /* TX_SETATTR */
923 zfs_replay_acl_v0, /* TX_ACL_V0 */
924 zfs_replay_acl, /* TX_ACL */
925 zfs_replay_create_acl, /* TX_CREATE_ACL */
926 zfs_replay_create, /* TX_CREATE_ATTR */
927 zfs_replay_create_acl, /* TX_CREATE_ACL_ATTR */
928 zfs_replay_create_acl, /* TX_MKDIR_ACL */
929 zfs_replay_create, /* TX_MKDIR_ATTR */
930 zfs_replay_create_acl, /* TX_MKDIR_ACL_ATTR */
931 zfs_replay_write2, /* TX_WRITE2 */
932 };
Community developed and maintained version of the OS/Net consolidation