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) 2015, 2018 by Delphix. All rights reserved.
24 */
25
26
27 #include <sys/types.h>
28 #include <sys/param.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/vfs.h>
35 #include <sys/zfs_znode.h>
36 #include <sys/zfs_dir.h>
37 #include <sys/zil.h>
38 #include <sys/zil_impl.h>
39 #include <sys/byteorder.h>
40 #include <sys/policy.h>
41 #include <sys/stat.h>
42 #include <sys/acl.h>
43 #include <sys/dmu.h>
44 #include <sys/dbuf.h>
45 #include <sys/spa.h>
46 #include <sys/zfs_fuid.h>
47 #include <sys/dsl_dataset.h>
48
49 /*
50 * These zfs_log_* functions must be called within a dmu tx, in one
51 * of 2 contexts depending on zilog->z_replay:
52 *
53 * Non replay mode
54 * ---------------
55 * We need to record the transaction so that if it is committed to
56 * the Intent Log then it can be replayed. An intent log transaction
57 * structure (itx_t) is allocated and all the information necessary to
58 * possibly replay the transaction is saved in it. The itx is then assigned
59 * a sequence number and inserted in the in-memory list anchored in the zilog.
60 *
61 * Replay mode
62 * -----------
63 * We need to mark the intent log record as replayed in the log header.
64 * This is done in the same transaction as the replay so that they
65 * commit atomically.
66 */
67
68 int
zfs_log_create_txtype(zil_create_t type,vsecattr_t * vsecp,vattr_t * vap)69 zfs_log_create_txtype(zil_create_t type, vsecattr_t *vsecp, vattr_t *vap)
70 {
71 int isxvattr = (vap->va_mask & ATTR_XVATTR);
72 switch (type) {
73 case Z_FILE:
74 if (vsecp == NULL && !isxvattr)
75 return (TX_CREATE);
76 if (vsecp && isxvattr)
77 return (TX_CREATE_ACL_ATTR);
78 if (vsecp)
79 return (TX_CREATE_ACL);
80 else
81 return (TX_CREATE_ATTR);
82 /*NOTREACHED*/
83 case Z_DIR:
84 if (vsecp == NULL && !isxvattr)
85 return (TX_MKDIR);
86 if (vsecp && isxvattr)
87 return (TX_MKDIR_ACL_ATTR);
88 if (vsecp)
89 return (TX_MKDIR_ACL);
90 else
91 return (TX_MKDIR_ATTR);
92 case Z_XATTRDIR:
93 return (TX_MKXATTR);
94 }
95 ASSERT(0);
96 return (TX_MAX_TYPE);
97 }
98
99 /*
100 * build up the log data necessary for logging xvattr_t
101 * First lr_attr_t is initialized. following the lr_attr_t
102 * is the mapsize and attribute bitmap copied from the xvattr_t.
103 * Following the bitmap and bitmapsize two 64 bit words are reserved
104 * for the create time which may be set. Following the create time
105 * records a single 64 bit integer which has the bits to set on
106 * replay for the xvattr.
107 */
108 static void
zfs_log_xvattr(lr_attr_t * lrattr,xvattr_t * xvap)109 zfs_log_xvattr(lr_attr_t *lrattr, xvattr_t *xvap)
110 {
111 uint32_t *bitmap;
112 uint64_t *attrs;
113 uint64_t *crtime;
114 xoptattr_t *xoap;
115 void *scanstamp;
116 int i;
117
118 xoap = xva_getxoptattr(xvap);
119 ASSERT(xoap);
120
121 lrattr->lr_attr_masksize = xvap->xva_mapsize;
122 bitmap = &lrattr->lr_attr_bitmap;
123 for (i = 0; i != xvap->xva_mapsize; i++, bitmap++) {
124 *bitmap = xvap->xva_reqattrmap[i];
125 }
126
127 /* Now pack the attributes up in a single uint64_t */
128 attrs = (uint64_t *)bitmap;
129 *attrs = 0;
130 crtime = attrs + 1;
131 bzero(crtime, 2 * sizeof (uint64_t));
132 scanstamp = (caddr_t)(crtime + 2);
133 bzero(scanstamp, AV_SCANSTAMP_SZ);
134 if (XVA_ISSET_REQ(xvap, XAT_READONLY))
135 *attrs |= (xoap->xoa_readonly == 0) ? 0 :
136 XAT0_READONLY;
137 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN))
138 *attrs |= (xoap->xoa_hidden == 0) ? 0 :
139 XAT0_HIDDEN;
140 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM))
141 *attrs |= (xoap->xoa_system == 0) ? 0 :
142 XAT0_SYSTEM;
143 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE))
144 *attrs |= (xoap->xoa_archive == 0) ? 0 :
145 XAT0_ARCHIVE;
146 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE))
147 *attrs |= (xoap->xoa_immutable == 0) ? 0 :
148 XAT0_IMMUTABLE;
149 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK))
150 *attrs |= (xoap->xoa_nounlink == 0) ? 0 :
151 XAT0_NOUNLINK;
152 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY))
153 *attrs |= (xoap->xoa_appendonly == 0) ? 0 :
154 XAT0_APPENDONLY;
155 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE))
156 *attrs |= (xoap->xoa_opaque == 0) ? 0 :
157 XAT0_APPENDONLY;
158 if (XVA_ISSET_REQ(xvap, XAT_NODUMP))
159 *attrs |= (xoap->xoa_nodump == 0) ? 0 :
160 XAT0_NODUMP;
161 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED))
162 *attrs |= (xoap->xoa_av_quarantined == 0) ? 0 :
163 XAT0_AV_QUARANTINED;
164 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED))
165 *attrs |= (xoap->xoa_av_modified == 0) ? 0 :
166 XAT0_AV_MODIFIED;
167 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME))
168 ZFS_TIME_ENCODE(&xoap->xoa_createtime, crtime);
169 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) {
170 ASSERT(!XVA_ISSET_REQ(xvap, XAT_PROJID));
171
172 bcopy(xoap->xoa_av_scanstamp, scanstamp, AV_SCANSTAMP_SZ);
173 } else if (XVA_ISSET_REQ(xvap, XAT_PROJID)) {
174 /*
175 * XAT_PROJID and XAT_AV_SCANSTAMP will never be valid
176 * at the same time, so we can share the same space.
177 */
178 bcopy(&xoap->xoa_projid, scanstamp, sizeof (uint64_t));
179 }
180 if (XVA_ISSET_REQ(xvap, XAT_REPARSE))
181 *attrs |= (xoap->xoa_reparse == 0) ? 0 :
182 XAT0_REPARSE;
183 if (XVA_ISSET_REQ(xvap, XAT_OFFLINE))
184 *attrs |= (xoap->xoa_offline == 0) ? 0 :
185 XAT0_OFFLINE;
186 if (XVA_ISSET_REQ(xvap, XAT_SPARSE))
187 *attrs |= (xoap->xoa_sparse == 0) ? 0 :
188 XAT0_SPARSE;
189 if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT))
190 *attrs |= (xoap->xoa_projinherit == 0) ? 0 :
191 XAT0_PROJINHERIT;
192 }
193
194 static void *
zfs_log_fuid_ids(zfs_fuid_info_t * fuidp,void * start)195 zfs_log_fuid_ids(zfs_fuid_info_t *fuidp, void *start)
196 {
197 zfs_fuid_t *zfuid;
198 uint64_t *fuidloc = start;
199
200 /* First copy in the ACE FUIDs */
201 for (zfuid = list_head(&fuidp->z_fuids); zfuid;
202 zfuid = list_next(&fuidp->z_fuids, zfuid)) {
203 *fuidloc++ = zfuid->z_logfuid;
204 }
205 return (fuidloc);
206 }
207
208
209 static void *
zfs_log_fuid_domains(zfs_fuid_info_t * fuidp,void * start)210 zfs_log_fuid_domains(zfs_fuid_info_t *fuidp, void *start)
211 {
212 zfs_fuid_domain_t *zdomain;
213
214 /* now copy in the domain info, if any */
215 if (fuidp->z_domain_str_sz != 0) {
216 for (zdomain = list_head(&fuidp->z_domains); zdomain;
217 zdomain = list_next(&fuidp->z_domains, zdomain)) {
218 bcopy((void *)zdomain->z_domain, start,
219 strlen(zdomain->z_domain) + 1);
220 start = (caddr_t)start +
221 strlen(zdomain->z_domain) + 1;
222 }
223 }
224 return (start);
225 }
226
227 /*
228 * If zp is an xattr node, check whether the xattr owner is unlinked.
229 * We don't want to log anything if the owner is unlinked.
230 */
231 static int
zfs_xattr_owner_unlinked(znode_t * zp)232 zfs_xattr_owner_unlinked(znode_t *zp)
233 {
234 int unlinked = 0;
235 znode_t *dzp;
236 #ifdef __FreeBSD__
237 znode_t *tzp = zp;
238
239 /*
240 * zrele drops the vnode lock which violates the VOP locking contract
241 * on FreeBSD. See comment at the top of zfs_replay.c for more detail.
242 */
243 /*
244 * if zp is XATTR node, keep walking up via z_xattr_parent until we
245 * get the owner
246 */
247 while (tzp->z_pflags & ZFS_XATTR) {
248 ASSERT3U(zp->z_xattr_parent, !=, 0);
249 if (zfs_zget(ZTOZSB(tzp), tzp->z_xattr_parent, &dzp) != 0) {
250 unlinked = 1;
251 break;
252 }
253
254 if (tzp != zp)
255 zrele(tzp);
256 tzp = dzp;
257 unlinked = tzp->z_unlinked;
258 }
259 if (tzp != zp)
260 zrele(tzp);
261 #else
262 zhold(zp);
263 /*
264 * if zp is XATTR node, keep walking up via z_xattr_parent until we
265 * get the owner
266 */
267 while (zp->z_pflags & ZFS_XATTR) {
268 ASSERT3U(zp->z_xattr_parent, !=, 0);
269 if (zfs_zget(ZTOZSB(zp), zp->z_xattr_parent, &dzp) != 0) {
270 unlinked = 1;
271 break;
272 }
273
274 zrele(zp);
275 zp = dzp;
276 unlinked = zp->z_unlinked;
277 }
278 zrele(zp);
279 #endif
280 return (unlinked);
281 }
282
283 /*
284 * Handles TX_CREATE, TX_CREATE_ATTR, TX_MKDIR, TX_MKDIR_ATTR and
285 * TK_MKXATTR transactions.
286 *
287 * TX_CREATE and TX_MKDIR are standard creates, but they may have FUID
288 * domain information appended prior to the name. In this case the
289 * uid/gid in the log record will be a log centric FUID.
290 *
291 * TX_CREATE_ACL_ATTR and TX_MKDIR_ACL_ATTR handle special creates that
292 * may contain attributes, ACL and optional fuid information.
293 *
294 * TX_CREATE_ACL and TX_MKDIR_ACL handle special creates that specify
295 * and ACL and normal users/groups in the ACEs.
296 *
297 * There may be an optional xvattr attribute information similar
298 * to zfs_log_setattr.
299 *
300 * Also, after the file name "domain" strings may be appended.
301 */
302 void
zfs_log_create(zilog_t * zilog,dmu_tx_t * tx,uint64_t txtype,znode_t * dzp,znode_t * zp,const char * name,vsecattr_t * vsecp,zfs_fuid_info_t * fuidp,vattr_t * vap)303 zfs_log_create(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
304 znode_t *dzp, znode_t *zp, const char *name, vsecattr_t *vsecp,
305 zfs_fuid_info_t *fuidp, vattr_t *vap)
306 {
307 itx_t *itx;
308 lr_create_t *lr;
309 lr_acl_create_t *lracl;
310 size_t aclsize = 0;
311 size_t xvatsize = 0;
312 size_t txsize;
313 xvattr_t *xvap = (xvattr_t *)vap;
314 void *end;
315 size_t lrsize;
316 size_t namesize = strlen(name) + 1;
317 size_t fuidsz = 0;
318
319 if (zil_replaying(zilog, tx) || zfs_xattr_owner_unlinked(dzp))
320 return;
321
322 /*
323 * If we have FUIDs present then add in space for
324 * domains and ACE fuid's if any.
325 */
326 if (fuidp) {
327 fuidsz += fuidp->z_domain_str_sz;
328 fuidsz += fuidp->z_fuid_cnt * sizeof (uint64_t);
329 }
330
331 if (vap->va_mask & ATTR_XVATTR)
332 xvatsize = ZIL_XVAT_SIZE(xvap->xva_mapsize);
333
334 if ((int)txtype == TX_CREATE_ATTR || (int)txtype == TX_MKDIR_ATTR ||
335 (int)txtype == TX_CREATE || (int)txtype == TX_MKDIR ||
336 (int)txtype == TX_MKXATTR) {
337 txsize = sizeof (*lr) + namesize + fuidsz + xvatsize;
338 lrsize = sizeof (*lr);
339 } else {
340 txsize =
341 sizeof (lr_acl_create_t) + namesize + fuidsz +
342 ZIL_ACE_LENGTH(aclsize) + xvatsize;
343 lrsize = sizeof (lr_acl_create_t);
344 }
345
346 itx = zil_itx_create(txtype, txsize);
347
348 lr = (lr_create_t *)&itx->itx_lr;
349 lr->lr_doid = dzp->z_id;
350 lr->lr_foid = zp->z_id;
351 /* Store dnode slot count in 8 bits above object id. */
352 LR_FOID_SET_SLOTS(lr->lr_foid, zp->z_dnodesize >> DNODE_SHIFT);
353 lr->lr_mode = zp->z_mode;
354 if (!IS_EPHEMERAL(KUID_TO_SUID(ZTOUID(zp)))) {
355 lr->lr_uid = (uint64_t)KUID_TO_SUID(ZTOUID(zp));
356 } else {
357 lr->lr_uid = fuidp->z_fuid_owner;
358 }
359 if (!IS_EPHEMERAL(KGID_TO_SGID(ZTOGID(zp)))) {
360 lr->lr_gid = (uint64_t)KGID_TO_SGID(ZTOGID(zp));
361 } else {
362 lr->lr_gid = fuidp->z_fuid_group;
363 }
364 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(ZTOZSB(zp)), &lr->lr_gen,
365 sizeof (uint64_t));
366 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(ZTOZSB(zp)),
367 lr->lr_crtime, sizeof (uint64_t) * 2);
368
369 if (sa_lookup(zp->z_sa_hdl, SA_ZPL_RDEV(ZTOZSB(zp)), &lr->lr_rdev,
370 sizeof (lr->lr_rdev)) != 0)
371 lr->lr_rdev = 0;
372
373 /*
374 * Fill in xvattr info if any
375 */
376 if (vap->va_mask & ATTR_XVATTR) {
377 zfs_log_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), xvap);
378 end = (caddr_t)lr + lrsize + xvatsize;
379 } else {
380 end = (caddr_t)lr + lrsize;
381 }
382
383 /* Now fill in any ACL info */
384
385 if (vsecp) {
386 lracl = (lr_acl_create_t *)&itx->itx_lr;
387 lracl->lr_aclcnt = vsecp->vsa_aclcnt;
388 lracl->lr_acl_bytes = aclsize;
389 lracl->lr_domcnt = fuidp ? fuidp->z_domain_cnt : 0;
390 lracl->lr_fuidcnt = fuidp ? fuidp->z_fuid_cnt : 0;
391 if (vsecp->vsa_aclflags & VSA_ACE_ACLFLAGS)
392 lracl->lr_acl_flags = (uint64_t)vsecp->vsa_aclflags;
393 else
394 lracl->lr_acl_flags = 0;
395
396 bcopy(vsecp->vsa_aclentp, end, aclsize);
397 end = (caddr_t)end + ZIL_ACE_LENGTH(aclsize);
398 }
399
400 /* drop in FUID info */
401 if (fuidp) {
402 end = zfs_log_fuid_ids(fuidp, end);
403 end = zfs_log_fuid_domains(fuidp, end);
404 }
405 /*
406 * Now place file name in log record
407 */
408 bcopy(name, end, namesize);
409
410 zil_itx_assign(zilog, itx, tx);
411 }
412
413 /*
414 * Handles both TX_REMOVE and TX_RMDIR transactions.
415 */
416 void
zfs_log_remove(zilog_t * zilog,dmu_tx_t * tx,uint64_t txtype,znode_t * dzp,const char * name,uint64_t foid,boolean_t unlinked)417 zfs_log_remove(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
418 znode_t *dzp, const char *name, uint64_t foid, boolean_t unlinked)
419 {
420 itx_t *itx;
421 lr_remove_t *lr;
422 size_t namesize = strlen(name) + 1;
423
424 if (zil_replaying(zilog, tx) || zfs_xattr_owner_unlinked(dzp))
425 return;
426
427 itx = zil_itx_create(txtype, sizeof (*lr) + namesize);
428 lr = (lr_remove_t *)&itx->itx_lr;
429 lr->lr_doid = dzp->z_id;
430 bcopy(name, (char *)(lr + 1), namesize);
431
432 itx->itx_oid = foid;
433
434 /*
435 * Object ids can be re-instantiated in the next txg so
436 * remove any async transactions to avoid future leaks.
437 * This can happen if a fsync occurs on the re-instantiated
438 * object for a WR_INDIRECT or WR_NEED_COPY write, which gets
439 * the new file data and flushes a write record for the old object.
440 */
441 if (unlinked) {
442 ASSERT((txtype & ~TX_CI) == TX_REMOVE);
443 zil_remove_async(zilog, foid);
444 }
445 zil_itx_assign(zilog, itx, tx);
446 }
447
448 /*
449 * Handles TX_LINK transactions.
450 */
451 void
zfs_log_link(zilog_t * zilog,dmu_tx_t * tx,uint64_t txtype,znode_t * dzp,znode_t * zp,const char * name)452 zfs_log_link(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
453 znode_t *dzp, znode_t *zp, const char *name)
454 {
455 itx_t *itx;
456 lr_link_t *lr;
457 size_t namesize = strlen(name) + 1;
458
459 if (zil_replaying(zilog, tx))
460 return;
461
462 itx = zil_itx_create(txtype, sizeof (*lr) + namesize);
463 lr = (lr_link_t *)&itx->itx_lr;
464 lr->lr_doid = dzp->z_id;
465 lr->lr_link_obj = zp->z_id;
466 bcopy(name, (char *)(lr + 1), namesize);
467
468 zil_itx_assign(zilog, itx, tx);
469 }
470
471 /*
472 * Handles TX_SYMLINK transactions.
473 */
474 void
zfs_log_symlink(zilog_t * zilog,dmu_tx_t * tx,uint64_t txtype,znode_t * dzp,znode_t * zp,const char * name,const char * link)475 zfs_log_symlink(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
476 znode_t *dzp, znode_t *zp, const char *name, const char *link)
477 {
478 itx_t *itx;
479 lr_create_t *lr;
480 size_t namesize = strlen(name) + 1;
481 size_t linksize = strlen(link) + 1;
482
483 if (zil_replaying(zilog, tx))
484 return;
485
486 itx = zil_itx_create(txtype, sizeof (*lr) + namesize + linksize);
487 lr = (lr_create_t *)&itx->itx_lr;
488 lr->lr_doid = dzp->z_id;
489 lr->lr_foid = zp->z_id;
490 lr->lr_uid = KUID_TO_SUID(ZTOUID(zp));
491 lr->lr_gid = KGID_TO_SGID(ZTOGID(zp));
492 lr->lr_mode = zp->z_mode;
493 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(ZTOZSB(zp)), &lr->lr_gen,
494 sizeof (uint64_t));
495 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(ZTOZSB(zp)),
496 lr->lr_crtime, sizeof (uint64_t) * 2);
497 bcopy(name, (char *)(lr + 1), namesize);
498 bcopy(link, (char *)(lr + 1) + namesize, linksize);
499
500 zil_itx_assign(zilog, itx, tx);
501 }
502
503 /*
504 * Handles TX_RENAME transactions.
505 */
506 void
zfs_log_rename(zilog_t * zilog,dmu_tx_t * tx,uint64_t txtype,znode_t * sdzp,const char * sname,znode_t * tdzp,const char * dname,znode_t * szp)507 zfs_log_rename(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype, znode_t *sdzp,
508 const char *sname, znode_t *tdzp, const char *dname, znode_t *szp)
509 {
510 itx_t *itx;
511 lr_rename_t *lr;
512 size_t snamesize = strlen(sname) + 1;
513 size_t dnamesize = strlen(dname) + 1;
514
515 if (zil_replaying(zilog, tx))
516 return;
517
518 itx = zil_itx_create(txtype, sizeof (*lr) + snamesize + dnamesize);
519 lr = (lr_rename_t *)&itx->itx_lr;
520 lr->lr_sdoid = sdzp->z_id;
521 lr->lr_tdoid = tdzp->z_id;
522 bcopy(sname, (char *)(lr + 1), snamesize);
523 bcopy(dname, (char *)(lr + 1) + snamesize, dnamesize);
524 itx->itx_oid = szp->z_id;
525
526 zil_itx_assign(zilog, itx, tx);
527 }
528
529 /*
530 * zfs_log_write() handles TX_WRITE transactions. The specified callback is
531 * called as soon as the write is on stable storage (be it via a DMU sync or a
532 * ZIL commit).
533 */
534 long zfs_immediate_write_sz = 32768;
535
536 void
zfs_log_write(zilog_t * zilog,dmu_tx_t * tx,int txtype,znode_t * zp,offset_t off,ssize_t resid,int ioflag,zil_callback_t callback,void * callback_data)537 zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype,
538 znode_t *zp, offset_t off, ssize_t resid, int ioflag,
539 zil_callback_t callback, void *callback_data)
540 {
541 dmu_buf_impl_t *db = (dmu_buf_impl_t *)sa_get_db(zp->z_sa_hdl);
542 uint32_t blocksize = zp->z_blksz;
543 itx_wr_state_t write_state;
544 uintptr_t fsync_cnt;
545 uint64_t gen = 0;
546
547 if (zil_replaying(zilog, tx) || zp->z_unlinked ||
548 zfs_xattr_owner_unlinked(zp)) {
549 if (callback != NULL)
550 callback(callback_data);
551 return;
552 }
553
554 if (zilog->zl_logbias == ZFS_LOGBIAS_THROUGHPUT)
555 write_state = WR_INDIRECT;
556 else if (!spa_has_slogs(zilog->zl_spa) &&
557 resid >= zfs_immediate_write_sz)
558 write_state = WR_INDIRECT;
559 else if (ioflag & (O_SYNC | O_DSYNC))
560 write_state = WR_COPIED;
561 else
562 write_state = WR_NEED_COPY;
563
564 if ((fsync_cnt = (uintptr_t)tsd_get(zfs_fsyncer_key)) != 0) {
565 (void) tsd_set(zfs_fsyncer_key, (void *)(fsync_cnt - 1));
566 }
567
568 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(ZTOZSB(zp)), &gen,
569 sizeof (gen));
570
571 while (resid) {
572 itx_t *itx;
573 lr_write_t *lr;
574 itx_wr_state_t wr_state = write_state;
575 ssize_t len = resid;
576
577 /*
578 * A WR_COPIED record must fit entirely in one log block.
579 * Large writes can use WR_NEED_COPY, which the ZIL will
580 * split into multiple records across several log blocks
581 * if necessary.
582 */
583 if (wr_state == WR_COPIED &&
584 resid > zil_max_copied_data(zilog))
585 wr_state = WR_NEED_COPY;
586 else if (wr_state == WR_INDIRECT)
587 len = MIN(blocksize - P2PHASE(off, blocksize), resid);
588
589 itx = zil_itx_create(txtype, sizeof (*lr) +
590 (wr_state == WR_COPIED ? len : 0));
591 lr = (lr_write_t *)&itx->itx_lr;
592
593 /*
594 * For WR_COPIED records, copy the data into the lr_write_t.
595 */
596 if (wr_state == WR_COPIED) {
597 int err;
598 DB_DNODE_ENTER(db);
599 err = dmu_read_by_dnode(DB_DNODE(db), off, len, lr + 1,
600 DMU_READ_NO_PREFETCH);
601 if (err != 0) {
602 zil_itx_destroy(itx);
603 itx = zil_itx_create(txtype, sizeof (*lr));
604 lr = (lr_write_t *)&itx->itx_lr;
605 wr_state = WR_NEED_COPY;
606 }
607 DB_DNODE_EXIT(db);
608 }
609
610 itx->itx_wr_state = wr_state;
611 lr->lr_foid = zp->z_id;
612 lr->lr_offset = off;
613 lr->lr_length = len;
614 lr->lr_blkoff = 0;
615 BP_ZERO(&lr->lr_blkptr);
616
617 itx->itx_private = ZTOZSB(zp);
618 itx->itx_gen = gen;
619
620 if (!(ioflag & (O_SYNC | O_DSYNC)) && (zp->z_sync_cnt == 0) &&
621 (fsync_cnt == 0))
622 itx->itx_sync = B_FALSE;
623
624 itx->itx_callback = callback;
625 itx->itx_callback_data = callback_data;
626 zil_itx_assign(zilog, itx, tx);
627
628 off += len;
629 resid -= len;
630 }
631 }
632
633 /*
634 * Handles TX_TRUNCATE transactions.
635 */
636 void
zfs_log_truncate(zilog_t * zilog,dmu_tx_t * tx,int txtype,znode_t * zp,uint64_t off,uint64_t len)637 zfs_log_truncate(zilog_t *zilog, dmu_tx_t *tx, int txtype,
638 znode_t *zp, uint64_t off, uint64_t len)
639 {
640 itx_t *itx;
641 lr_truncate_t *lr;
642
643 if (zil_replaying(zilog, tx) || zp->z_unlinked ||
644 zfs_xattr_owner_unlinked(zp))
645 return;
646
647 itx = zil_itx_create(txtype, sizeof (*lr));
648 lr = (lr_truncate_t *)&itx->itx_lr;
649 lr->lr_foid = zp->z_id;
650 lr->lr_offset = off;
651 lr->lr_length = len;
652
653 itx->itx_sync = (zp->z_sync_cnt != 0);
654 zil_itx_assign(zilog, itx, tx);
655 }
656
657 /*
658 * Handles TX_SETATTR transactions.
659 */
660 void
zfs_log_setattr(zilog_t * zilog,dmu_tx_t * tx,int txtype,znode_t * zp,vattr_t * vap,uint_t mask_applied,zfs_fuid_info_t * fuidp)661 zfs_log_setattr(zilog_t *zilog, dmu_tx_t *tx, int txtype,
662 znode_t *zp, vattr_t *vap, uint_t mask_applied, zfs_fuid_info_t *fuidp)
663 {
664 itx_t *itx;
665 lr_setattr_t *lr;
666 xvattr_t *xvap = (xvattr_t *)vap;
667 size_t recsize = sizeof (lr_setattr_t);
668 void *start;
669
670 if (zil_replaying(zilog, tx) || zp->z_unlinked)
671 return;
672
673 /*
674 * If XVATTR set, then log record size needs to allow
675 * for lr_attr_t + xvattr mask, mapsize and create time
676 * plus actual attribute values
677 */
678 if (vap->va_mask & ATTR_XVATTR)
679 recsize = sizeof (*lr) + ZIL_XVAT_SIZE(xvap->xva_mapsize);
680
681 if (fuidp)
682 recsize += fuidp->z_domain_str_sz;
683
684 itx = zil_itx_create(txtype, recsize);
685 lr = (lr_setattr_t *)&itx->itx_lr;
686 lr->lr_foid = zp->z_id;
687 lr->lr_mask = (uint64_t)mask_applied;
688 lr->lr_mode = (uint64_t)vap->va_mode;
689 if ((mask_applied & ATTR_UID) && IS_EPHEMERAL(vap->va_uid))
690 lr->lr_uid = fuidp->z_fuid_owner;
691 else
692 lr->lr_uid = (uint64_t)vap->va_uid;
693
694 if ((mask_applied & ATTR_GID) && IS_EPHEMERAL(vap->va_gid))
695 lr->lr_gid = fuidp->z_fuid_group;
696 else
697 lr->lr_gid = (uint64_t)vap->va_gid;
698
699 lr->lr_size = (uint64_t)vap->va_size;
700 ZFS_TIME_ENCODE(&vap->va_atime, lr->lr_atime);
701 ZFS_TIME_ENCODE(&vap->va_mtime, lr->lr_mtime);
702 start = (lr_setattr_t *)(lr + 1);
703 if (vap->va_mask & ATTR_XVATTR) {
704 zfs_log_xvattr((lr_attr_t *)start, xvap);
705 start = (caddr_t)start + ZIL_XVAT_SIZE(xvap->xva_mapsize);
706 }
707
708 /*
709 * Now stick on domain information if any on end
710 */
711
712 if (fuidp)
713 (void) zfs_log_fuid_domains(fuidp, start);
714
715 itx->itx_sync = (zp->z_sync_cnt != 0);
716 zil_itx_assign(zilog, itx, tx);
717 }
718
719 /*
720 * Handles TX_ACL transactions.
721 */
722 void
zfs_log_acl(zilog_t * zilog,dmu_tx_t * tx,znode_t * zp,vsecattr_t * vsecp,zfs_fuid_info_t * fuidp)723 zfs_log_acl(zilog_t *zilog, dmu_tx_t *tx, znode_t *zp,
724 vsecattr_t *vsecp, zfs_fuid_info_t *fuidp)
725 {
726 itx_t *itx;
727 lr_acl_v0_t *lrv0;
728 lr_acl_t *lr;
729 int txtype;
730 int lrsize;
731 size_t txsize;
732 size_t aclbytes = vsecp->vsa_aclentsz;
733
734 if (zil_replaying(zilog, tx) || zp->z_unlinked)
735 return;
736
737 txtype = (ZTOZSB(zp)->z_version < ZPL_VERSION_FUID) ?
738 TX_ACL_V0 : TX_ACL;
739
740 if (txtype == TX_ACL)
741 lrsize = sizeof (*lr);
742 else
743 lrsize = sizeof (*lrv0);
744
745 txsize = lrsize +
746 ((txtype == TX_ACL) ? ZIL_ACE_LENGTH(aclbytes) : aclbytes) +
747 (fuidp ? fuidp->z_domain_str_sz : 0) +
748 sizeof (uint64_t) * (fuidp ? fuidp->z_fuid_cnt : 0);
749
750 itx = zil_itx_create(txtype, txsize);
751
752 lr = (lr_acl_t *)&itx->itx_lr;
753 lr->lr_foid = zp->z_id;
754 if (txtype == TX_ACL) {
755 lr->lr_acl_bytes = aclbytes;
756 lr->lr_domcnt = fuidp ? fuidp->z_domain_cnt : 0;
757 lr->lr_fuidcnt = fuidp ? fuidp->z_fuid_cnt : 0;
758 if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS)
759 lr->lr_acl_flags = (uint64_t)vsecp->vsa_aclflags;
760 else
761 lr->lr_acl_flags = 0;
762 }
763 lr->lr_aclcnt = (uint64_t)vsecp->vsa_aclcnt;
764
765 if (txtype == TX_ACL_V0) {
766 lrv0 = (lr_acl_v0_t *)lr;
767 bcopy(vsecp->vsa_aclentp, (ace_t *)(lrv0 + 1), aclbytes);
768 } else {
769 void *start = (ace_t *)(lr + 1);
770
771 bcopy(vsecp->vsa_aclentp, start, aclbytes);
772
773 start = (caddr_t)start + ZIL_ACE_LENGTH(aclbytes);
774
775 if (fuidp) {
776 start = zfs_log_fuid_ids(fuidp, start);
777 (void) zfs_log_fuid_domains(fuidp, start);
778 }
779 }
780
781 itx->itx_sync = (zp->z_sync_cnt != 0);
782 zil_itx_assign(zilog, itx, tx);
783 }
784
785 /* BEGIN CSTYLED */
786 ZFS_MODULE_PARAM(zfs, zfs_, immediate_write_sz, LONG, ZMOD_RW,
787 "Largest data block to write to zil");
788 /* END CSTYLED */
789