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don't bother resolving onbld python module deps
[unleashed.git] / kernel / fs / zfs / zfs_replay.c
blob2c4882c68f3755178bd7ece8251d93fb6bf2b2ff
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/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(void *arg1, void *arg2, 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(void *arg1, void *arg2, boolean_t byteswap)
266 {
267 zfsvfs_t *zfsvfs = arg1;
268 lr_acl_create_t *lracl = arg2;
269 char *name = NULL; /* location determined later */
270 lr_create_t *lr = (lr_create_t *)lracl;
271 znode_t *dzp;
272 vnode_t *vp = NULL;
273 xvattr_t xva;
274 int vflg = 0;
275 vsecattr_t vsec = { 0 };
276 lr_attr_t *lrattr;
277 void *aclstart;
278 void *fuidstart;
279 size_t xvatlen = 0;
280 uint64_t txtype;
281 int error;
282
283 txtype = (lr->lr_common.lrc_txtype & ~TX_CI);
284 if (byteswap) {
285 byteswap_uint64_array(lracl, sizeof (*lracl));
286 if (txtype == TX_CREATE_ACL_ATTR ||
287 txtype == TX_MKDIR_ACL_ATTR) {
288 lrattr = (lr_attr_t *)(caddr_t)(lracl + 1);
289 zfs_replay_swap_attrs(lrattr);
290 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
291 }
292
293 aclstart = (caddr_t)(lracl + 1) + xvatlen;
294 zfs_ace_byteswap(aclstart, lracl->lr_acl_bytes, B_FALSE);
295 /* swap fuids */
296 if (lracl->lr_fuidcnt) {
297 byteswap_uint64_array((caddr_t)aclstart +
298 ZIL_ACE_LENGTH(lracl->lr_acl_bytes),
299 lracl->lr_fuidcnt * sizeof (uint64_t));
300 }
301 }
302
303 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
304 return (error);
305
306 xva_init(&xva);
307 zfs_init_vattr(&xva.xva_vattr, AT_TYPE | AT_MODE | AT_UID | AT_GID,
308 lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, lr->lr_foid);
309
310 /*
311 * All forms of zfs create (create, mkdir, mkxattrdir, symlink)
312 * eventually end up in zfs_mknode(), which assigns the object's
313 * creation time and generation number. The generic fop_create()
314 * doesn't have either concept, so we smuggle the values inside
315 * the vattr's otherwise unused va_ctime and va_nblocks fields.
316 */
317 ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime);
318 xva.xva_vattr.va_nblocks = lr->lr_gen;
319
320 error = dmu_object_info(zfsvfs->z_os, lr->lr_foid, NULL);
321 if (error != ENOENT)
322 goto bail;
323
324 if (lr->lr_common.lrc_txtype & TX_CI)
325 vflg |= FIGNORECASE;
326 switch (txtype) {
327 case TX_CREATE_ACL:
328 aclstart = (caddr_t)(lracl + 1);
329 fuidstart = (caddr_t)aclstart +
330 ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
331 zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart,
332 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
333 lr->lr_uid, lr->lr_gid);
334 /*FALLTHROUGH*/
335 case TX_CREATE_ACL_ATTR:
336 if (name == NULL) {
337 lrattr = (lr_attr_t *)(caddr_t)(lracl + 1);
338 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
339 xva.xva_vattr.va_mask |= AT_XVATTR;
340 zfs_replay_xvattr(lrattr, &xva);
341 }
342 vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS;
343 vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen;
344 vsec.vsa_aclcnt = lracl->lr_aclcnt;
345 vsec.vsa_aclentsz = lracl->lr_acl_bytes;
346 vsec.vsa_aclflags = lracl->lr_acl_flags;
347 if (zfsvfs->z_fuid_replay == NULL) {
348 fuidstart = (caddr_t)(lracl + 1) + xvatlen +
349 ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
350 zfsvfs->z_fuid_replay =
351 zfs_replay_fuids(fuidstart,
352 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
353 lr->lr_uid, lr->lr_gid);
354 }
355
356 error = fop_create(ZTOV(dzp), name, &xva.xva_vattr,
357 0, 0, &vp, kcred, vflg, NULL, &vsec);
358 break;
359 case TX_MKDIR_ACL:
360 aclstart = (caddr_t)(lracl + 1);
361 fuidstart = (caddr_t)aclstart +
362 ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
363 zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart,
364 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
365 lr->lr_uid, lr->lr_gid);
366 /*FALLTHROUGH*/
367 case TX_MKDIR_ACL_ATTR:
368 if (name == NULL) {
369 lrattr = (lr_attr_t *)(caddr_t)(lracl + 1);
370 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
371 zfs_replay_xvattr(lrattr, &xva);
372 }
373 vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS;
374 vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen;
375 vsec.vsa_aclcnt = lracl->lr_aclcnt;
376 vsec.vsa_aclentsz = lracl->lr_acl_bytes;
377 vsec.vsa_aclflags = lracl->lr_acl_flags;
378 if (zfsvfs->z_fuid_replay == NULL) {
379 fuidstart = (caddr_t)(lracl + 1) + xvatlen +
380 ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
381 zfsvfs->z_fuid_replay =
382 zfs_replay_fuids(fuidstart,
383 (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
384 lr->lr_uid, lr->lr_gid);
385 }
386 error = fop_mkdir(ZTOV(dzp), name, &xva.xva_vattr,
387 &vp, kcred, NULL, vflg, &vsec);
388 break;
389 default:
390 error = SET_ERROR(ENOTSUP);
391 }
392
393 bail:
394 if (error == 0 && vp != NULL)
395 VN_RELE(vp);
396
397 VN_RELE(ZTOV(dzp));
398
399 if (zfsvfs->z_fuid_replay)
400 zfs_fuid_info_free(zfsvfs->z_fuid_replay);
401 zfsvfs->z_fuid_replay = NULL;
402
403 return (error);
404 }
405
406 static int
407 zfs_replay_create(void *arg1, void *arg2, boolean_t byteswap)
408 {
409 zfsvfs_t *zfsvfs = arg1;
410 lr_create_t *lr = arg2;
411 char *name = NULL; /* location determined later */
412 char *link; /* symlink content follows name */
413 znode_t *dzp;
414 vnode_t *vp = NULL;
415 xvattr_t xva;
416 int vflg = 0;
417 size_t lrsize = sizeof (lr_create_t);
418 lr_attr_t *lrattr;
419 void *start;
420 size_t xvatlen;
421 uint64_t txtype;
422 int error;
423
424 txtype = (lr->lr_common.lrc_txtype & ~TX_CI);
425 if (byteswap) {
426 byteswap_uint64_array(lr, sizeof (*lr));
427 if (txtype == TX_CREATE_ATTR || txtype == TX_MKDIR_ATTR)
428 zfs_replay_swap_attrs((lr_attr_t *)(lr + 1));
429 }
430
431
432 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
433 return (error);
434
435 xva_init(&xva);
436 zfs_init_vattr(&xva.xva_vattr, AT_TYPE | AT_MODE | AT_UID | AT_GID,
437 lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, lr->lr_foid);
438
439 /*
440 * All forms of zfs create (create, mkdir, mkxattrdir, symlink)
441 * eventually end up in zfs_mknode(), which assigns the object's
442 * creation time and generation number. The generic fop_create()
443 * doesn't have either concept, so we smuggle the values inside
444 * the vattr's otherwise unused va_ctime and va_nblocks fields.
445 */
446 ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime);
447 xva.xva_vattr.va_nblocks = lr->lr_gen;
448
449 error = dmu_object_info(zfsvfs->z_os, lr->lr_foid, NULL);
450 if (error != ENOENT)
451 goto out;
452
453 if (lr->lr_common.lrc_txtype & TX_CI)
454 vflg |= FIGNORECASE;
455
456 /*
457 * Symlinks don't have fuid info, and CIFS never creates
458 * symlinks.
459 *
460 * The _ATTR versions will grab the fuid info in their subcases.
461 */
462 if ((int)lr->lr_common.lrc_txtype != TX_SYMLINK &&
463 (int)lr->lr_common.lrc_txtype != TX_MKDIR_ATTR &&
464 (int)lr->lr_common.lrc_txtype != TX_CREATE_ATTR) {
465 start = (lr + 1);
466 zfsvfs->z_fuid_replay =
467 zfs_replay_fuid_domain(start, &start,
468 lr->lr_uid, lr->lr_gid);
469 }
470
471 switch (txtype) {
472 case TX_CREATE_ATTR:
473 lrattr = (lr_attr_t *)(caddr_t)(lr + 1);
474 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
475 zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva);
476 start = (caddr_t)(lr + 1) + xvatlen;
477 zfsvfs->z_fuid_replay =
478 zfs_replay_fuid_domain(start, &start,
479 lr->lr_uid, lr->lr_gid);
480 name = (char *)start;
481
482 /*FALLTHROUGH*/
483 case TX_CREATE:
484 if (name == NULL)
485 name = (char *)start;
486
487 error = fop_create(ZTOV(dzp), name, &xva.xva_vattr,
488 0, 0, &vp, kcred, vflg, NULL, NULL);
489 break;
490 case TX_MKDIR_ATTR:
491 lrattr = (lr_attr_t *)(caddr_t)(lr + 1);
492 xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
493 zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva);
494 start = (caddr_t)(lr + 1) + xvatlen;
495 zfsvfs->z_fuid_replay =
496 zfs_replay_fuid_domain(start, &start,
497 lr->lr_uid, lr->lr_gid);
498 name = (char *)start;
499
500 /*FALLTHROUGH*/
501 case TX_MKDIR:
502 if (name == NULL)
503 name = (char *)(lr + 1);
504
505 error = fop_mkdir(ZTOV(dzp), name, &xva.xva_vattr,
506 &vp, kcred, NULL, vflg, NULL);
507 break;
508 case TX_MKXATTR:
509 error = zfs_make_xattrdir(dzp, &xva.xva_vattr, &vp, kcred);
510 break;
511 case TX_SYMLINK:
512 name = (char *)(lr + 1);
513 link = name + strlen(name) + 1;
514 error = fop_symlink(ZTOV(dzp), name, &xva.xva_vattr,
515 link, kcred, NULL, vflg);
516 break;
517 default:
518 error = SET_ERROR(ENOTSUP);
519 }
520
521 out:
522 if (error == 0 && vp != NULL)
523 VN_RELE(vp);
524
525 VN_RELE(ZTOV(dzp));
526
527 if (zfsvfs->z_fuid_replay)
528 zfs_fuid_info_free(zfsvfs->z_fuid_replay);
529 zfsvfs->z_fuid_replay = NULL;
530 return (error);
531 }
532
533 static int
534 zfs_replay_remove(void *arg1, void *arg2, boolean_t byteswap)
535 {
536 zfsvfs_t *zfsvfs = arg1;
537 lr_remove_t *lr = arg2;
538 char *name = (char *)(lr + 1); /* name follows lr_remove_t */
539 znode_t *dzp;
540 int error;
541 int vflg = 0;
542
543 if (byteswap)
544 byteswap_uint64_array(lr, sizeof (*lr));
545
546 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
547 return (error);
548
549 if (lr->lr_common.lrc_txtype & TX_CI)
550 vflg |= FIGNORECASE;
551
552 switch ((int)lr->lr_common.lrc_txtype) {
553 case TX_REMOVE:
554 error = fop_remove(ZTOV(dzp), name, kcred, NULL, vflg);
555 break;
556 case TX_RMDIR:
557 error = fop_rmdir(ZTOV(dzp), name, NULL, kcred, NULL, vflg);
558 break;
559 default:
560 error = SET_ERROR(ENOTSUP);
561 }
562
563 VN_RELE(ZTOV(dzp));
564
565 return (error);
566 }
567
568 static int
569 zfs_replay_link(void *arg1, void *arg2, boolean_t byteswap)
570 {
571 zfsvfs_t *zfsvfs = arg1;
572 lr_link_t *lr = arg2;
573 char *name = (char *)(lr + 1); /* name follows lr_link_t */
574 znode_t *dzp, *zp;
575 int error;
576 int vflg = 0;
577
578 if (byteswap)
579 byteswap_uint64_array(lr, sizeof (*lr));
580
581 if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
582 return (error);
583
584 if ((error = zfs_zget(zfsvfs, lr->lr_link_obj, &zp)) != 0) {
585 VN_RELE(ZTOV(dzp));
586 return (error);
587 }
588
589 if (lr->lr_common.lrc_txtype & TX_CI)
590 vflg |= FIGNORECASE;
591
592 error = fop_link(ZTOV(dzp), ZTOV(zp), name, kcred, NULL, vflg);
593
594 VN_RELE(ZTOV(zp));
595 VN_RELE(ZTOV(dzp));
596
597 return (error);
598 }
599
600 static int
601 zfs_replay_rename(void *arg1, void *arg2, boolean_t byteswap)
602 {
603 zfsvfs_t *zfsvfs = arg1;
604 lr_rename_t *lr = arg2;
605 char *sname = (char *)(lr + 1); /* sname and tname follow lr_rename_t */
606 char *tname = sname + strlen(sname) + 1;
607 znode_t *sdzp, *tdzp;
608 int error;
609 int vflg = 0;
610
611 if (byteswap)
612 byteswap_uint64_array(lr, sizeof (*lr));
613
614 if ((error = zfs_zget(zfsvfs, lr->lr_sdoid, &sdzp)) != 0)
615 return (error);
616
617 if ((error = zfs_zget(zfsvfs, lr->lr_tdoid, &tdzp)) != 0) {
618 VN_RELE(ZTOV(sdzp));
619 return (error);
620 }
621
622 if (lr->lr_common.lrc_txtype & TX_CI)
623 vflg |= FIGNORECASE;
624
625 error = fop_rename(ZTOV(sdzp), sname, ZTOV(tdzp), tname, kcred,
626 NULL, vflg);
627
628 VN_RELE(ZTOV(tdzp));
629 VN_RELE(ZTOV(sdzp));
630
631 return (error);
632 }
633
634 static int
635 zfs_replay_write(void *arg1, void *arg2, boolean_t byteswap)
636 {
637 zfsvfs_t *zfsvfs = arg1;
638 lr_write_t *lr = arg2;
639 char *data = (char *)(lr + 1); /* data follows lr_write_t */
640 znode_t *zp;
641 int error;
642 ssize_t resid;
643 uint64_t eod, offset, length;
644
645 if (byteswap)
646 byteswap_uint64_array(lr, sizeof (*lr));
647
648 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) {
649 /*
650 * As we can log writes out of order, it's possible the
651 * file has been removed. In this case just drop the write
652 * and return success.
653 */
654 if (error == ENOENT)
655 error = 0;
656 return (error);
657 }
658
659 offset = lr->lr_offset;
660 length = lr->lr_length;
661 eod = offset + length; /* end of data for this write */
662
663 /*
664 * This may be a write from a dmu_sync() for a whole block,
665 * and may extend beyond the current end of the file.
666 * We can't just replay what was written for this TX_WRITE as
667 * a future TX_WRITE2 may extend the eof and the data for that
668 * write needs to be there. So we write the whole block and
669 * reduce the eof. This needs to be done within the single dmu
670 * transaction created within vn_rdwr -> zfs_write. So a possible
671 * new end of file is passed through in zfsvfs->z_replay_eof
672 */
673
674 zfsvfs->z_replay_eof = 0; /* 0 means don't change end of file */
675
676 /* If it's a dmu_sync() block, write the whole block */
677 if (lr->lr_common.lrc_reclen == sizeof (lr_write_t)) {
678 uint64_t blocksize = BP_GET_LSIZE(&lr->lr_blkptr);
679 if (length < blocksize) {
680 offset -= offset % blocksize;
681 length = blocksize;
682 }
683 if (zp->z_size < eod)
684 zfsvfs->z_replay_eof = eod;
685 }
686
687 error = vn_rdwr(UIO_WRITE, ZTOV(zp), data, length, offset,
688 UIO_SYSSPACE, 0, RLIM64_INFINITY, kcred, &resid);
689
690 VN_RELE(ZTOV(zp));
691 zfsvfs->z_replay_eof = 0; /* safety */
692
693 return (error);
694 }
695
696 /*
697 * TX_WRITE2 are only generated when dmu_sync() returns EALREADY
698 * meaning the pool block is already being synced. So now that we always write
699 * out full blocks, all we have to do is expand the eof if
700 * the file is grown.
701 */
702 static int
703 zfs_replay_write2(void *arg1, void *arg2, boolean_t byteswap)
704 {
705 zfsvfs_t *zfsvfs = arg1;
706 lr_write_t *lr = arg2;
707 znode_t *zp;
708 int error;
709 uint64_t end;
710
711 if (byteswap)
712 byteswap_uint64_array(lr, sizeof (*lr));
713
714 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
715 return (error);
716
717 top:
718 end = lr->lr_offset + lr->lr_length;
719 if (end > zp->z_size) {
720 dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
721
722 zp->z_size = end;
723 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
724 error = dmu_tx_assign(tx, TXG_WAIT);
725 if (error) {
726 VN_RELE(ZTOV(zp));
727 if (error == ERESTART) {
728 dmu_tx_wait(tx);
729 dmu_tx_abort(tx);
730 goto top;
731 }
732 dmu_tx_abort(tx);
733 return (error);
734 }
735 (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
736 (void *)&zp->z_size, sizeof (uint64_t), tx);
737
738 /* Ensure the replayed seq is updated */
739 (void) zil_replaying(zfsvfs->z_log, tx);
740
741 dmu_tx_commit(tx);
742 }
743
744 VN_RELE(ZTOV(zp));
745
746 return (error);
747 }
748
749 static int
750 zfs_replay_truncate(void *arg1, void *arg2, boolean_t byteswap)
751 {
752 zfsvfs_t *zfsvfs = arg1;
753 lr_truncate_t *lr = arg2;
754 znode_t *zp;
755 flock64_t fl;
756 int error;
757
758 if (byteswap)
759 byteswap_uint64_array(lr, sizeof (*lr));
760
761 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
762 return (error);
763
764 bzero(&fl, sizeof (fl));
765 fl.l_type = F_WRLCK;
766 fl.l_whence = 0;
767 fl.l_start = lr->lr_offset;
768 fl.l_len = lr->lr_length;
769
770 error = fop_space(ZTOV(zp), F_FREESP, &fl, FWRITE | FOFFMAX,
771 lr->lr_offset, kcred, NULL);
772
773 VN_RELE(ZTOV(zp));
774
775 return (error);
776 }
777
778 static int
779 zfs_replay_setattr(void *arg1, void *arg2, boolean_t byteswap)
780 {
781 zfsvfs_t *zfsvfs = arg1;
782 lr_setattr_t *lr = arg2;
783 znode_t *zp;
784 xvattr_t xva;
785 vattr_t *vap = &xva.xva_vattr;
786 int error;
787 void *start;
788
789 xva_init(&xva);
790 if (byteswap) {
791 byteswap_uint64_array(lr, sizeof (*lr));
792
793 if ((lr->lr_mask & AT_XVATTR) &&
794 zfsvfs->z_version >= ZPL_VERSION_INITIAL)
795 zfs_replay_swap_attrs((lr_attr_t *)(lr + 1));
796 }
797
798 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
799 return (error);
800
801 zfs_init_vattr(vap, lr->lr_mask, lr->lr_mode,
802 lr->lr_uid, lr->lr_gid, 0, lr->lr_foid);
803
804 vap->va_size = lr->lr_size;
805 ZFS_TIME_DECODE(&vap->va_atime, lr->lr_atime);
806 ZFS_TIME_DECODE(&vap->va_mtime, lr->lr_mtime);
807
808 /*
809 * Fill in xvattr_t portions if necessary.
810 */
811
812 start = (lr_setattr_t *)(lr + 1);
813 if (vap->va_mask & AT_XVATTR) {
814 zfs_replay_xvattr((lr_attr_t *)start, &xva);
815 start = (caddr_t)start +
816 ZIL_XVAT_SIZE(((lr_attr_t *)start)->lr_attr_masksize);
817 } else
818 xva.xva_vattr.va_mask &= ~AT_XVATTR;
819
820 zfsvfs->z_fuid_replay = zfs_replay_fuid_domain(start, &start,
821 lr->lr_uid, lr->lr_gid);
822
823 error = fop_setattr(ZTOV(zp), vap, 0, kcred, NULL);
824
825 zfs_fuid_info_free(zfsvfs->z_fuid_replay);
826 zfsvfs->z_fuid_replay = NULL;
827 VN_RELE(ZTOV(zp));
828
829 return (error);
830 }
831
832 static int
833 zfs_replay_acl_v0(void *arg1, void *arg2, boolean_t byteswap)
834 {
835 zfsvfs_t *zfsvfs = arg1;
836 lr_acl_v0_t *lr = arg2;
837 ace_t *ace = (ace_t *)(lr + 1); /* ace array follows lr_acl_t */
838 vsecattr_t vsa;
839 znode_t *zp;
840 int error;
841
842 if (byteswap) {
843 byteswap_uint64_array(lr, sizeof (*lr));
844 zfs_oldace_byteswap(ace, lr->lr_aclcnt);
845 }
846
847 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
848 return (error);
849
850 bzero(&vsa, sizeof (vsa));
851 vsa.vsa_mask = VSA_ACE | VSA_ACECNT;
852 vsa.vsa_aclcnt = lr->lr_aclcnt;
853 vsa.vsa_aclentsz = sizeof (ace_t) * vsa.vsa_aclcnt;
854 vsa.vsa_aclflags = 0;
855 vsa.vsa_aclentp = ace;
856
857 error = fop_setsecattr(ZTOV(zp), &vsa, 0, kcred, NULL);
858
859 VN_RELE(ZTOV(zp));
860
861 return (error);
862 }
863
864 /*
865 * Replaying ACLs is complicated by FUID support.
866 * The log record may contain some optional data
867 * to be used for replaying FUID's. These pieces
868 * are the actual FUIDs that were created initially.
869 * The FUID table index may no longer be valid and
870 * during zfs_create() a new index may be assigned.
871 * Because of this the log will contain the original
872 * doman+rid in order to create a new FUID.
873 *
874 * The individual ACEs may contain an ephemeral uid/gid which is no
875 * longer valid and will need to be replaced with an actual FUID.
876 *
877 */
878 static int
879 zfs_replay_acl(void *arg1, void *arg2, boolean_t byteswap)
880 {
881 zfsvfs_t *zfsvfs = arg1;
882 lr_acl_t *lr = arg2;
883 ace_t *ace = (ace_t *)(lr + 1);
884 vsecattr_t vsa;
885 znode_t *zp;
886 int error;
887
888 if (byteswap) {
889 byteswap_uint64_array(lr, sizeof (*lr));
890 zfs_ace_byteswap(ace, lr->lr_acl_bytes, B_FALSE);
891 if (lr->lr_fuidcnt) {
892 byteswap_uint64_array((caddr_t)ace +
893 ZIL_ACE_LENGTH(lr->lr_acl_bytes),
894 lr->lr_fuidcnt * sizeof (uint64_t));
895 }
896 }
897
898 if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
899 return (error);
900
901 bzero(&vsa, sizeof (vsa));
902 vsa.vsa_mask = VSA_ACE | VSA_ACECNT | VSA_ACE_ACLFLAGS;
903 vsa.vsa_aclcnt = lr->lr_aclcnt;
904 vsa.vsa_aclentp = ace;
905 vsa.vsa_aclentsz = lr->lr_acl_bytes;
906 vsa.vsa_aclflags = lr->lr_acl_flags;
907
908 if (lr->lr_fuidcnt) {
909 void *fuidstart = (caddr_t)ace +
910 ZIL_ACE_LENGTH(lr->lr_acl_bytes);
911
912 zfsvfs->z_fuid_replay =
913 zfs_replay_fuids(fuidstart, &fuidstart,
914 lr->lr_fuidcnt, lr->lr_domcnt, 0, 0);
915 }
916
917 error = fop_setsecattr(ZTOV(zp), &vsa, 0, kcred, NULL);
918
919 if (zfsvfs->z_fuid_replay)
920 zfs_fuid_info_free(zfsvfs->z_fuid_replay);
921
922 zfsvfs->z_fuid_replay = NULL;
923 VN_RELE(ZTOV(zp));
924
925 return (error);
926 }
927
928 /*
929 * Callback vectors for replaying records
930 */
931 zil_replay_func_t *zfs_replay_vector[TX_MAX_TYPE] = {
932 zfs_replay_error, /* 0 no such transaction type */
933 zfs_replay_create, /* TX_CREATE */
934 zfs_replay_create, /* TX_MKDIR */
935 zfs_replay_create, /* TX_MKXATTR */
936 zfs_replay_create, /* TX_SYMLINK */
937 zfs_replay_remove, /* TX_REMOVE */
938 zfs_replay_remove, /* TX_RMDIR */
939 zfs_replay_link, /* TX_LINK */
940 zfs_replay_rename, /* TX_RENAME */
941 zfs_replay_write, /* TX_WRITE */
942 zfs_replay_truncate, /* TX_TRUNCATE */
943 zfs_replay_setattr, /* TX_SETATTR */
944 zfs_replay_acl_v0, /* TX_ACL_V0 */
945 zfs_replay_acl, /* TX_ACL */
946 zfs_replay_create_acl, /* TX_CREATE_ACL */
947 zfs_replay_create, /* TX_CREATE_ATTR */
948 zfs_replay_create_acl, /* TX_CREATE_ACL_ATTR */
949 zfs_replay_create_acl, /* TX_MKDIR_ACL */
950 zfs_replay_create, /* TX_MKDIR_ATTR */
951 zfs_replay_create_acl, /* TX_MKDIR_ACL_ATTR */
952 zfs_replay_write2, /* TX_WRITE2 */
953 };
Unleashed OS