linprocfs - Introduce /proc/mounts
[dragonfly.git] / sys / kern / vfs_jops.c
blob56a4ecf4ebb6f62b63e5df993cae29c0a65c7400
1 /*
2 * Copyright (c) 2004-2006 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
34 * $DragonFly: src/sys/kern/vfs_jops.c,v 1.36 2007/08/21 17:43:52 dillon Exp $
37 * Each mount point may have zero or more independantly configured journals
38 * attached to it. Each journal is represented by a memory FIFO and worker
39 * thread. Journal events are streamed through the FIFO to the thread,
40 * batched up (typically on one-second intervals), and written out by the
41 * thread.
43 * Journal vnode ops are executed instead of mnt_vn_norm_ops when one or
44 * more journals have been installed on a mount point. It becomes the
45 * responsibility of the journal op to call the underlying normal op as
46 * appropriate.
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/buf.h>
51 #include <sys/conf.h>
52 #include <sys/kernel.h>
53 #include <sys/queue.h>
54 #include <sys/lock.h>
55 #include <sys/malloc.h>
56 #include <sys/mount.h>
57 #include <sys/unistd.h>
58 #include <sys/vnode.h>
59 #include <sys/poll.h>
60 #include <sys/mountctl.h>
61 #include <sys/journal.h>
62 #include <sys/file.h>
63 #include <sys/proc.h>
64 #include <sys/socket.h>
65 #include <sys/socketvar.h>
67 #include <machine/limits.h>
69 #include <vm/vm.h>
70 #include <vm/vm_object.h>
71 #include <vm/vm_page.h>
72 #include <vm/vm_pager.h>
73 #include <vm/vnode_pager.h>
75 #include <sys/file2.h>
76 #include <sys/thread2.h>
78 static int journal_attach(struct mount *mp);
79 static void journal_detach(struct mount *mp);
80 static int journal_install_vfs_journal(struct mount *mp, struct file *fp,
81 const struct mountctl_install_journal *info);
82 static int journal_restart_vfs_journal(struct mount *mp, struct file *fp,
83 const struct mountctl_restart_journal *info);
84 static int journal_remove_vfs_journal(struct mount *mp,
85 const struct mountctl_remove_journal *info);
86 static int journal_restart(struct mount *mp, struct file *fp,
87 struct journal *jo, int flags);
88 static int journal_destroy(struct mount *mp, struct journal *jo, int flags);
89 static int journal_resync_vfs_journal(struct mount *mp, const void *ctl);
90 static int journal_status_vfs_journal(struct mount *mp,
91 const struct mountctl_status_journal *info,
92 struct mountctl_journal_ret_status *rstat,
93 int buflen, int *res);
95 static void jrecord_undo_file(struct jrecord *jrec, struct vnode *vp,
96 int jrflags, off_t off, off_t bytes);
98 static int journal_setattr(struct vop_setattr_args *ap);
99 static int journal_write(struct vop_write_args *ap);
100 static int journal_fsync(struct vop_fsync_args *ap);
101 static int journal_putpages(struct vop_putpages_args *ap);
102 static int journal_setacl(struct vop_setacl_args *ap);
103 static int journal_setextattr(struct vop_setextattr_args *ap);
104 static int journal_ncreate(struct vop_ncreate_args *ap);
105 static int journal_nmknod(struct vop_nmknod_args *ap);
106 static int journal_nlink(struct vop_nlink_args *ap);
107 static int journal_nsymlink(struct vop_nsymlink_args *ap);
108 static int journal_nwhiteout(struct vop_nwhiteout_args *ap);
109 static int journal_nremove(struct vop_nremove_args *ap);
110 static int journal_nmkdir(struct vop_nmkdir_args *ap);
111 static int journal_nrmdir(struct vop_nrmdir_args *ap);
112 static int journal_nrename(struct vop_nrename_args *ap);
114 #define JRUNDO_SIZE 0x00000001
115 #define JRUNDO_UID 0x00000002
116 #define JRUNDO_GID 0x00000004
117 #define JRUNDO_FSID 0x00000008
118 #define JRUNDO_MODES 0x00000010
119 #define JRUNDO_INUM 0x00000020
120 #define JRUNDO_ATIME 0x00000040
121 #define JRUNDO_MTIME 0x00000080
122 #define JRUNDO_CTIME 0x00000100
123 #define JRUNDO_GEN 0x00000200
124 #define JRUNDO_FLAGS 0x00000400
125 #define JRUNDO_UDEV 0x00000800
126 #define JRUNDO_NLINK 0x00001000
127 #define JRUNDO_FILEDATA 0x00010000
128 #define JRUNDO_GETVP 0x00020000
129 #define JRUNDO_CONDLINK 0x00040000 /* write file data if link count 1 */
130 #define JRUNDO_VATTR (JRUNDO_SIZE|JRUNDO_UID|JRUNDO_GID|JRUNDO_FSID|\
131 JRUNDO_MODES|JRUNDO_INUM|JRUNDO_ATIME|JRUNDO_MTIME|\
132 JRUNDO_CTIME|JRUNDO_GEN|JRUNDO_FLAGS|JRUNDO_UDEV|\
133 JRUNDO_NLINK)
134 #define JRUNDO_ALL (JRUNDO_VATTR|JRUNDO_FILEDATA)
136 static struct vop_ops journal_vnode_vops = {
137 .vop_default = vop_journal_operate_ap,
138 .vop_mountctl = journal_mountctl,
139 .vop_setattr = journal_setattr,
140 .vop_write = journal_write,
141 .vop_fsync = journal_fsync,
142 .vop_putpages = journal_putpages,
143 .vop_setacl = journal_setacl,
144 .vop_setextattr = journal_setextattr,
145 .vop_ncreate = journal_ncreate,
146 .vop_nmknod = journal_nmknod,
147 .vop_nlink = journal_nlink,
148 .vop_nsymlink = journal_nsymlink,
149 .vop_nwhiteout = journal_nwhiteout,
150 .vop_nremove = journal_nremove,
151 .vop_nmkdir = journal_nmkdir,
152 .vop_nrmdir = journal_nrmdir,
153 .vop_nrename = journal_nrename
157 journal_mountctl(struct vop_mountctl_args *ap)
159 struct mount *mp;
160 int error = 0;
162 mp = ap->a_head.a_ops->head.vv_mount;
163 KKASSERT(mp);
165 if (mp->mnt_vn_journal_ops == NULL) {
166 switch(ap->a_op) {
167 case MOUNTCTL_INSTALL_VFS_JOURNAL:
168 error = journal_attach(mp);
169 if (error == 0 && ap->a_ctllen != sizeof(struct mountctl_install_journal))
170 error = EINVAL;
171 if (error == 0 && ap->a_fp == NULL)
172 error = EBADF;
173 if (error == 0)
174 error = journal_install_vfs_journal(mp, ap->a_fp, ap->a_ctl);
175 if (TAILQ_EMPTY(&mp->mnt_jlist))
176 journal_detach(mp);
177 break;
178 case MOUNTCTL_RESTART_VFS_JOURNAL:
179 case MOUNTCTL_REMOVE_VFS_JOURNAL:
180 case MOUNTCTL_RESYNC_VFS_JOURNAL:
181 case MOUNTCTL_STATUS_VFS_JOURNAL:
182 error = ENOENT;
183 break;
184 default:
185 error = EOPNOTSUPP;
186 break;
188 } else {
189 switch(ap->a_op) {
190 case MOUNTCTL_INSTALL_VFS_JOURNAL:
191 if (ap->a_ctllen != sizeof(struct mountctl_install_journal))
192 error = EINVAL;
193 if (error == 0 && ap->a_fp == NULL)
194 error = EBADF;
195 if (error == 0)
196 error = journal_install_vfs_journal(mp, ap->a_fp, ap->a_ctl);
197 break;
198 case MOUNTCTL_RESTART_VFS_JOURNAL:
199 if (ap->a_ctllen != sizeof(struct mountctl_restart_journal))
200 error = EINVAL;
201 if (error == 0 && ap->a_fp == NULL)
202 error = EBADF;
203 if (error == 0)
204 error = journal_restart_vfs_journal(mp, ap->a_fp, ap->a_ctl);
205 break;
206 case MOUNTCTL_REMOVE_VFS_JOURNAL:
207 if (ap->a_ctllen != sizeof(struct mountctl_remove_journal))
208 error = EINVAL;
209 if (error == 0)
210 error = journal_remove_vfs_journal(mp, ap->a_ctl);
211 if (TAILQ_EMPTY(&mp->mnt_jlist))
212 journal_detach(mp);
213 break;
214 case MOUNTCTL_RESYNC_VFS_JOURNAL:
215 if (ap->a_ctllen != 0)
216 error = EINVAL;
217 error = journal_resync_vfs_journal(mp, ap->a_ctl);
218 break;
219 case MOUNTCTL_STATUS_VFS_JOURNAL:
220 if (ap->a_ctllen != sizeof(struct mountctl_status_journal))
221 error = EINVAL;
222 if (error == 0) {
223 error = journal_status_vfs_journal(mp, ap->a_ctl,
224 ap->a_buf, ap->a_buflen, ap->a_res);
226 break;
227 default:
228 error = EOPNOTSUPP;
229 break;
232 return (error);
236 * High level mount point setup. When a
238 static int
239 journal_attach(struct mount *mp)
241 KKASSERT(mp->mnt_jbitmap == NULL);
242 vfs_add_vnodeops(mp, &journal_vnode_vops, &mp->mnt_vn_journal_ops);
243 mp->mnt_jbitmap = kmalloc(JREC_STREAMID_JMAX/8, M_JOURNAL, M_WAITOK|M_ZERO);
244 mp->mnt_streamid = JREC_STREAMID_JMIN;
245 return(0);
248 static void
249 journal_detach(struct mount *mp)
251 KKASSERT(mp->mnt_jbitmap != NULL);
252 if (mp->mnt_vn_journal_ops)
253 vfs_rm_vnodeops(mp, &journal_vnode_vops, &mp->mnt_vn_journal_ops);
254 kfree(mp->mnt_jbitmap, M_JOURNAL);
255 mp->mnt_jbitmap = NULL;
259 * Install a journal on a mount point. Each journal has an associated worker
260 * thread which is responsible for buffering and spooling the data to the
261 * target. A mount point may have multiple journals attached to it. An
262 * initial start record is generated when the journal is associated.
264 static int
265 journal_install_vfs_journal(struct mount *mp, struct file *fp,
266 const struct mountctl_install_journal *info)
268 struct journal *jo;
269 struct jrecord jrec;
270 int error = 0;
271 int size;
273 jo = kmalloc(sizeof(struct journal), M_JOURNAL, M_WAITOK|M_ZERO);
274 bcopy(info->id, jo->id, sizeof(jo->id));
275 jo->flags = info->flags & ~(MC_JOURNAL_WACTIVE | MC_JOURNAL_RACTIVE |
276 MC_JOURNAL_STOP_REQ);
279 * Memory FIFO size, round to nearest power of 2
281 if (info->membufsize) {
282 if (info->membufsize < 65536)
283 size = 65536;
284 else if (info->membufsize > 128 * 1024 * 1024)
285 size = 128 * 1024 * 1024;
286 else
287 size = (int)info->membufsize;
288 } else {
289 size = 1024 * 1024;
291 jo->fifo.size = 1;
292 while (jo->fifo.size < size)
293 jo->fifo.size <<= 1;
296 * Other parameters. If not specified the starting transaction id
297 * will be the current date.
299 if (info->transid) {
300 jo->transid = info->transid;
301 } else {
302 struct timespec ts;
303 getnanotime(&ts);
304 jo->transid = ((int64_t)ts.tv_sec << 30) | ts.tv_nsec;
307 jo->fp = fp;
310 * Allocate the memory FIFO
312 jo->fifo.mask = jo->fifo.size - 1;
313 jo->fifo.membase = kmalloc(jo->fifo.size, M_JFIFO, M_WAITOK|M_ZERO|M_NULLOK);
314 if (jo->fifo.membase == NULL)
315 error = ENOMEM;
318 * Create the worker threads and generate the association record.
320 if (error) {
321 kfree(jo, M_JOURNAL);
322 } else {
323 fhold(fp);
324 journal_create_threads(jo);
325 jrecord_init(jo, &jrec, JREC_STREAMID_DISCONT);
326 jrecord_write(&jrec, JTYPE_ASSOCIATE, 0);
327 jrecord_done(&jrec, 0);
328 TAILQ_INSERT_TAIL(&mp->mnt_jlist, jo, jentry);
330 return(error);
334 * Restart a journal with a new descriptor. The existing reader and writer
335 * threads are terminated and a new descriptor is associated with the
336 * journal. The FIFO rindex is reset to xindex and the threads are then
337 * restarted.
339 static int
340 journal_restart_vfs_journal(struct mount *mp, struct file *fp,
341 const struct mountctl_restart_journal *info)
343 struct journal *jo;
344 int error;
346 TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) {
347 if (bcmp(jo->id, info->id, sizeof(jo->id)) == 0)
348 break;
350 if (jo)
351 error = journal_restart(mp, fp, jo, info->flags);
352 else
353 error = EINVAL;
354 return (error);
357 static int
358 journal_restart(struct mount *mp, struct file *fp,
359 struct journal *jo, int flags)
362 * XXX lock the jo
365 #if 0
367 * Record the fact that we are doing a restart in the journal.
368 * XXX it isn't safe to do this if the journal is being restarted
369 * because it was locked up and the writer thread has already exited.
371 jrecord_init(jo, &jrec, JREC_STREAMID_RESTART);
372 jrecord_write(&jrec, JTYPE_DISASSOCIATE, 0);
373 jrecord_done(&jrec, 0);
374 #endif
377 * Stop the reader and writer threads and clean up the current
378 * descriptor.
380 kprintf("RESTART WITH FP %p KILLING %p\n", fp, jo->fp);
381 journal_destroy_threads(jo, flags);
383 if (jo->fp)
384 fdrop(jo->fp);
387 * Associate the new descriptor, reset the FIFO index, and recreate
388 * the threads.
390 fhold(fp);
391 jo->fp = fp;
392 jo->fifo.rindex = jo->fifo.xindex;
393 journal_create_threads(jo);
395 return(0);
399 * Disassociate a journal from a mount point and terminate its worker thread.
400 * A final termination record is written out before the file pointer is
401 * dropped.
403 static int
404 journal_remove_vfs_journal(struct mount *mp,
405 const struct mountctl_remove_journal *info)
407 struct journal *jo;
408 int error;
410 TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) {
411 if (bcmp(jo->id, info->id, sizeof(jo->id)) == 0)
412 break;
414 if (jo)
415 error = journal_destroy(mp, jo, info->flags);
416 else
417 error = EINVAL;
418 return (error);
422 * Remove all journals associated with a mount point. Usually called
423 * by the umount code.
425 void
426 journal_remove_all_journals(struct mount *mp, int flags)
428 struct journal *jo;
430 while ((jo = TAILQ_FIRST(&mp->mnt_jlist)) != NULL) {
431 journal_destroy(mp, jo, flags);
435 static int
436 journal_destroy(struct mount *mp, struct journal *jo, int flags)
438 struct jrecord jrec;
440 TAILQ_REMOVE(&mp->mnt_jlist, jo, jentry);
442 jrecord_init(jo, &jrec, JREC_STREAMID_DISCONT);
443 jrecord_write(&jrec, JTYPE_DISASSOCIATE, 0);
444 jrecord_done(&jrec, 0);
446 journal_destroy_threads(jo, flags);
448 if (jo->fp)
449 fdrop(jo->fp);
450 if (jo->fifo.membase)
451 kfree(jo->fifo.membase, M_JFIFO);
452 kfree(jo, M_JOURNAL);
454 return(0);
457 static int
458 journal_resync_vfs_journal(struct mount *mp, const void *ctl)
460 return(EINVAL);
463 static int
464 journal_status_vfs_journal(struct mount *mp,
465 const struct mountctl_status_journal *info,
466 struct mountctl_journal_ret_status *rstat,
467 int buflen, int *res)
469 struct journal *jo;
470 int error = 0;
471 int index;
473 index = 0;
474 *res = 0;
475 TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) {
476 if (info->index == MC_JOURNAL_INDEX_ID) {
477 if (bcmp(jo->id, info->id, sizeof(jo->id)) != 0)
478 continue;
479 } else if (info->index >= 0) {
480 if (info->index < index)
481 continue;
482 } else if (info->index != MC_JOURNAL_INDEX_ALL) {
483 continue;
485 if (buflen < sizeof(*rstat)) {
486 if (*res)
487 rstat[-1].flags |= MC_JOURNAL_STATUS_MORETOCOME;
488 else
489 error = EINVAL;
490 break;
492 bzero(rstat, sizeof(*rstat));
493 rstat->recsize = sizeof(*rstat);
494 bcopy(jo->id, rstat->id, sizeof(jo->id));
495 rstat->index = index;
496 rstat->membufsize = jo->fifo.size;
497 rstat->membufused = jo->fifo.windex - jo->fifo.xindex;
498 rstat->membufunacked = jo->fifo.rindex - jo->fifo.xindex;
499 rstat->bytessent = jo->total_acked;
500 rstat->fifostalls = jo->fifostalls;
501 ++rstat;
502 ++index;
503 *res += sizeof(*rstat);
504 buflen -= sizeof(*rstat);
506 return(error);
509 /************************************************************************
510 * PARALLEL TRANSACTION SUPPORT ROUTINES *
511 ************************************************************************
513 * JRECLIST_*() - routines which create and iterate over jrecord structures,
514 * because a mount point may have multiple attached journals.
518 * Initialize the passed jrecord_list and create a jrecord for each
519 * journal we need to write to. Unnecessary mallocs are avoided by
520 * using the passed jrecord structure as the first jrecord in the list.
521 * A starting transaction is pushed for each jrecord.
523 * Returns non-zero if any of the journals require undo records.
525 static
527 jreclist_init(struct mount *mp, struct jrecord_list *jreclist,
528 struct jrecord *jreccache, int16_t rectype)
530 struct journal *jo;
531 struct jrecord *jrec;
532 int wantrev;
533 int count;
534 int16_t streamid;
536 TAILQ_INIT(&jreclist->list);
539 * Select the stream ID to use for the transaction. We must select
540 * a stream ID that is not currently in use by some other parallel
541 * transaction.
543 * Don't bother calculating the next streamid when reassigning
544 * mnt_streamid, since parallel transactions are fairly rare. This
545 * also allows someone observing the raw records to clearly see
546 * when parallel transactions occur.
548 streamid = mp->mnt_streamid;
549 count = 0;
550 while (mp->mnt_jbitmap[streamid >> 3] & (1 << (streamid & 7))) {
551 if (++streamid == JREC_STREAMID_JMAX)
552 streamid = JREC_STREAMID_JMIN;
553 if (++count == JREC_STREAMID_JMAX - JREC_STREAMID_JMIN) {
554 kprintf("jreclist_init: all streamid's in use! sleeping\n");
555 tsleep(jreclist, 0, "jsidfl", hz * 10);
556 count = 0;
559 mp->mnt_jbitmap[streamid >> 3] |= 1 << (streamid & 7);
560 mp->mnt_streamid = streamid;
561 jreclist->streamid = streamid;
564 * Now initialize a stream on each journal.
566 count = 0;
567 wantrev = 0;
568 TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) {
569 if (count == 0)
570 jrec = jreccache;
571 else
572 jrec = kmalloc(sizeof(*jrec), M_JOURNAL, M_WAITOK);
573 jrecord_init(jo, jrec, streamid);
574 jrec->user_save = jrecord_push(jrec, rectype);
575 TAILQ_INSERT_TAIL(&jreclist->list, jrec, user_entry);
576 if (jo->flags & MC_JOURNAL_WANT_REVERSABLE)
577 wantrev = 1;
578 ++count;
580 return(wantrev);
584 * Terminate the journaled transactions started by jreclist_init(). If
585 * an error occured, the transaction records will be aborted.
587 static
588 void
589 jreclist_done(struct mount *mp, struct jrecord_list *jreclist, int error)
591 struct jrecord *jrec;
592 int count;
595 * Cleanup the jrecord state on each journal.
597 TAILQ_FOREACH(jrec, &jreclist->list, user_entry) {
598 jrecord_pop(jrec, jrec->user_save);
599 jrecord_done(jrec, error);
603 * Free allocated jrec's (the first is always supplied)
605 count = 0;
606 while ((jrec = TAILQ_FIRST(&jreclist->list)) != NULL) {
607 TAILQ_REMOVE(&jreclist->list, jrec, user_entry);
608 if (count)
609 kfree(jrec, M_JOURNAL);
610 ++count;
614 * Clear the streamid so it can be reused.
616 mp->mnt_jbitmap[jreclist->streamid >> 3] &= ~(1 << (jreclist->streamid & 7));
620 * This procedure writes out UNDO records for available reversable
621 * journals.
623 * XXX could use improvement. There is no need to re-read the file
624 * for each journal.
626 static
627 void
628 jreclist_undo_file(struct jrecord_list *jreclist, struct vnode *vp,
629 int jrflags, off_t off, off_t bytes)
631 struct jrecord *jrec;
632 int error;
634 error = 0;
635 if (jrflags & JRUNDO_GETVP)
636 error = vget(vp, LK_SHARED);
637 if (error == 0) {
638 TAILQ_FOREACH(jrec, &jreclist->list, user_entry) {
639 if (jrec->jo->flags & MC_JOURNAL_WANT_REVERSABLE) {
640 jrecord_undo_file(jrec, vp, jrflags, off, bytes);
644 if (error == 0 && jrflags & JRUNDO_GETVP)
645 vput(vp);
648 /************************************************************************
649 * LOW LEVEL UNDO SUPPORT ROUTINE *
650 ************************************************************************
652 * This function is used to support UNDO records. It will generate an
653 * appropriate record with the requested portion of the file data. Note
654 * that file data is only recorded if JRUNDO_FILEDATA is passed. If bytes
655 * is -1, it will be set to the size of the file.
657 static void
658 jrecord_undo_file(struct jrecord *jrec, struct vnode *vp, int jrflags,
659 off_t off, off_t bytes)
661 struct vattr attr;
662 void *save1; /* warning, save pointers do not always remain valid */
663 void *save2;
664 int error;
667 * Setup. Start the UNDO record, obtain a shared lock on the vnode,
668 * and retrieve attribute info.
670 save1 = jrecord_push(jrec, JTYPE_UNDO);
671 error = VOP_GETATTR(vp, &attr);
672 if (error)
673 goto done;
676 * Generate UNDO records as requested.
678 if (jrflags & JRUNDO_VATTR) {
679 save2 = jrecord_push(jrec, JTYPE_VATTR);
680 jrecord_leaf(jrec, JLEAF_VTYPE, &attr.va_type, sizeof(attr.va_type));
681 if ((jrflags & JRUNDO_NLINK) && attr.va_nlink != VNOVAL)
682 jrecord_leaf(jrec, JLEAF_NLINK, &attr.va_nlink, sizeof(attr.va_nlink));
683 if ((jrflags & JRUNDO_SIZE) && attr.va_size != VNOVAL)
684 jrecord_leaf(jrec, JLEAF_SIZE, &attr.va_size, sizeof(attr.va_size));
685 if ((jrflags & JRUNDO_UID) && attr.va_uid != VNOVAL)
686 jrecord_leaf(jrec, JLEAF_UID, &attr.va_uid, sizeof(attr.va_uid));
687 if ((jrflags & JRUNDO_GID) && attr.va_gid != VNOVAL)
688 jrecord_leaf(jrec, JLEAF_GID, &attr.va_gid, sizeof(attr.va_gid));
689 if ((jrflags & JRUNDO_FSID) && attr.va_fsid != VNOVAL)
690 jrecord_leaf(jrec, JLEAF_FSID, &attr.va_fsid, sizeof(attr.va_fsid));
691 if ((jrflags & JRUNDO_MODES) && attr.va_mode != (mode_t)VNOVAL)
692 jrecord_leaf(jrec, JLEAF_MODES, &attr.va_mode, sizeof(attr.va_mode));
693 if ((jrflags & JRUNDO_INUM) && attr.va_fileid != VNOVAL)
694 jrecord_leaf(jrec, JLEAF_INUM, &attr.va_fileid, sizeof(attr.va_fileid));
695 if ((jrflags & JRUNDO_ATIME) && attr.va_atime.tv_sec != VNOVAL)
696 jrecord_leaf(jrec, JLEAF_ATIME, &attr.va_atime, sizeof(attr.va_atime));
697 if ((jrflags & JRUNDO_MTIME) && attr.va_mtime.tv_sec != VNOVAL)
698 jrecord_leaf(jrec, JLEAF_MTIME, &attr.va_mtime, sizeof(attr.va_mtime));
699 if ((jrflags & JRUNDO_CTIME) && attr.va_ctime.tv_sec != VNOVAL)
700 jrecord_leaf(jrec, JLEAF_CTIME, &attr.va_ctime, sizeof(attr.va_ctime));
701 if ((jrflags & JRUNDO_GEN) && attr.va_gen != VNOVAL)
702 jrecord_leaf(jrec, JLEAF_GEN, &attr.va_gen, sizeof(attr.va_gen));
703 if ((jrflags & JRUNDO_FLAGS) && attr.va_flags != VNOVAL)
704 jrecord_leaf(jrec, JLEAF_FLAGS, &attr.va_flags, sizeof(attr.va_flags));
705 if ((jrflags & JRUNDO_UDEV) && attr.va_rmajor != VNOVAL) {
706 udev_t rdev = makeudev(attr.va_rmajor, attr.va_rminor);
707 jrecord_leaf(jrec, JLEAF_UDEV, &rdev, sizeof(rdev));
708 jrecord_leaf(jrec, JLEAF_UMAJOR, &attr.va_rmajor, sizeof(attr.va_rmajor));
709 jrecord_leaf(jrec, JLEAF_UMINOR, &attr.va_rminor, sizeof(attr.va_rminor));
711 jrecord_pop(jrec, save2);
715 * Output the file data being overwritten by reading the file and
716 * writing it out to the journal prior to the write operation. We
717 * do not need to write out data past the current file EOF.
719 * XXX support JRUNDO_CONDLINK - do not write out file data for files
720 * with a link count > 1. The undo code needs to locate the inode and
721 * regenerate the hardlink.
723 if ((jrflags & JRUNDO_FILEDATA) && attr.va_type == VREG) {
724 if (attr.va_size != VNOVAL) {
725 if (bytes == -1)
726 bytes = attr.va_size - off;
727 if (off + bytes > attr.va_size)
728 bytes = attr.va_size - off;
729 if (bytes > 0)
730 jrecord_file_data(jrec, vp, off, bytes);
731 } else {
732 error = EINVAL;
735 if ((jrflags & JRUNDO_FILEDATA) && attr.va_type == VLNK) {
736 struct iovec aiov;
737 struct uio auio;
738 char *buf;
740 buf = kmalloc(PATH_MAX, M_JOURNAL, M_WAITOK);
741 aiov.iov_base = buf;
742 aiov.iov_len = PATH_MAX;
743 auio.uio_iov = &aiov;
744 auio.uio_iovcnt = 1;
745 auio.uio_offset = 0;
746 auio.uio_rw = UIO_READ;
747 auio.uio_segflg = UIO_SYSSPACE;
748 auio.uio_td = curthread;
749 auio.uio_resid = PATH_MAX;
750 error = VOP_READLINK(vp, &auio, proc0.p_ucred);
751 if (error == 0) {
752 jrecord_leaf(jrec, JLEAF_SYMLINKDATA, buf,
753 PATH_MAX - auio.uio_resid);
755 kfree(buf, M_JOURNAL);
757 done:
758 if (error)
759 jrecord_leaf(jrec, JLEAF_ERROR, &error, sizeof(error));
760 jrecord_pop(jrec, save1);
763 /************************************************************************
764 * JOURNAL VNOPS *
765 ************************************************************************
767 * These are function shims replacing the normal filesystem ops. We become
768 * responsible for calling the underlying filesystem ops. We have the choice
769 * of executing the underlying op first and then generating the journal entry,
770 * or starting the journal entry, executing the underlying op, and then
771 * either completing or aborting it.
773 * The journal is supposed to be a high-level entity, which generally means
774 * identifying files by name rather then by inode. Supplying both allows
775 * the journal to be used both for inode-number-compatible 'mirrors' and
776 * for simple filesystem replication.
778 * Writes are particularly difficult to deal with because a single write may
779 * represent a hundred megabyte buffer or more, and both writes and truncations
780 * require the 'old' data to be written out as well as the new data if the
781 * log is reversable. Other issues:
783 * - How to deal with operations on unlinked files (no path available),
784 * but which may still be filesystem visible due to hard links.
786 * - How to deal with modifications made via a memory map.
788 * - Future cache coherency support will require cache coherency API calls
789 * both prior to and after the call to the underlying VFS.
791 * ALSO NOTE: We do not have to shim compatibility VOPs like MKDIR which have
792 * new VFS equivalents (NMKDIR).
796 * Journal vop_setattr { a_vp, a_vap, a_cred }
798 static
800 journal_setattr(struct vop_setattr_args *ap)
802 struct jrecord_list jreclist;
803 struct jrecord jreccache;
804 struct jrecord *jrec;
805 struct mount *mp;
806 void *save;
807 int error;
809 mp = ap->a_head.a_ops->head.vv_mount;
810 if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_SETATTR)) {
811 jreclist_undo_file(&jreclist, ap->a_vp, JRUNDO_VATTR, 0, 0);
813 error = vop_journal_operate_ap(&ap->a_head);
814 if (error == 0) {
815 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
816 jrecord_write_cred(jrec, curthread, ap->a_cred);
817 jrecord_write_vnode_ref(jrec, ap->a_vp);
818 save = jrecord_push(jrec, JTYPE_REDO);
819 jrecord_write_vattr(jrec, ap->a_vap);
820 jrecord_pop(jrec, save);
823 jreclist_done(mp, &jreclist, error);
824 return (error);
828 * Journal vop_write { a_vp, a_uio, a_ioflag, a_cred }
830 static
832 journal_write(struct vop_write_args *ap)
834 struct jrecord_list jreclist;
835 struct jrecord jreccache;
836 struct jrecord *jrec;
837 struct mount *mp;
838 struct uio uio_copy;
839 struct iovec uio_one_iovec;
840 void *save;
841 int error;
844 * Special synchronizing writes for VM backing store do not supply any
845 * real data
847 if (ap->a_uio->uio_segflg == UIO_NOCOPY) {
848 error = vop_journal_operate_ap(&ap->a_head);
849 return (error);
853 * This is really nasty. UIO's don't retain sufficient information to
854 * be reusable once they've gone through the VOP chain. The iovecs get
855 * cleared, so we have to copy the UIO.
857 * XXX fix the UIO code to not destroy iov's during a scan so we can
858 * reuse the uio over and over again.
860 * XXX UNDO code needs to journal the old data prior to the write.
862 uio_copy = *ap->a_uio;
863 if (uio_copy.uio_iovcnt == 1) {
864 uio_one_iovec = ap->a_uio->uio_iov[0];
865 uio_copy.uio_iov = &uio_one_iovec;
866 } else {
867 uio_copy.uio_iov = kmalloc(uio_copy.uio_iovcnt * sizeof(struct iovec),
868 M_JOURNAL, M_WAITOK);
869 bcopy(ap->a_uio->uio_iov, uio_copy.uio_iov,
870 uio_copy.uio_iovcnt * sizeof(struct iovec));
874 * Write out undo data. Note that uio_offset is incorrect if
875 * IO_APPEND is set, but fortunately we have no undo file data to
876 * write out in that case.
878 mp = ap->a_head.a_ops->head.vv_mount;
879 if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_WRITE)) {
880 if (ap->a_ioflag & IO_APPEND) {
881 jreclist_undo_file(&jreclist, ap->a_vp, JRUNDO_SIZE|JRUNDO_MTIME, 0, 0);
882 } else {
883 jreclist_undo_file(&jreclist, ap->a_vp,
884 JRUNDO_FILEDATA|JRUNDO_SIZE|JRUNDO_MTIME,
885 uio_copy.uio_offset, uio_copy.uio_resid);
888 error = vop_journal_operate_ap(&ap->a_head);
891 * XXX bad hack to figure out the offset for O_APPEND writes (note:
892 * uio field state after the VFS operation).
894 uio_copy.uio_offset = ap->a_uio->uio_offset -
895 (uio_copy.uio_resid - ap->a_uio->uio_resid);
898 * Output the write data to the journal.
900 if (error == 0) {
901 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
902 jrecord_write_cred(jrec, NULL, ap->a_cred);
903 jrecord_write_vnode_ref(jrec, ap->a_vp);
904 save = jrecord_push(jrec, JTYPE_REDO);
905 jrecord_write_uio(jrec, JLEAF_FILEDATA, &uio_copy);
906 jrecord_pop(jrec, save);
909 jreclist_done(mp, &jreclist, error);
911 if (uio_copy.uio_iov != &uio_one_iovec)
912 kfree(uio_copy.uio_iov, M_JOURNAL);
913 return (error);
917 * Journal vop_fsync { a_vp, a_waitfor }
919 static
921 journal_fsync(struct vop_fsync_args *ap)
923 #if 0
924 struct mount *mp;
925 struct journal *jo;
926 #endif
927 int error;
929 error = vop_journal_operate_ap(&ap->a_head);
930 #if 0
931 mp = ap->a_head.a_ops->head.vv_mount;
932 if (error == 0) {
933 TAILQ_FOREACH(jo, &mp->mnt_jlist, jentry) {
934 /* XXX synchronize pending journal records */
937 #endif
938 return (error);
942 * Journal vop_putpages { a_vp, a_m, a_count, a_sync, a_rtvals, a_offset }
944 * note: a_count is in bytes.
946 static
948 journal_putpages(struct vop_putpages_args *ap)
950 struct jrecord_list jreclist;
951 struct jrecord jreccache;
952 struct jrecord *jrec;
953 struct mount *mp;
954 void *save;
955 int error;
957 mp = ap->a_head.a_ops->head.vv_mount;
958 if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_PUTPAGES) &&
959 ap->a_count > 0
961 jreclist_undo_file(&jreclist, ap->a_vp,
962 JRUNDO_FILEDATA|JRUNDO_SIZE|JRUNDO_MTIME,
963 ap->a_offset, btoc(ap->a_count));
965 error = vop_journal_operate_ap(&ap->a_head);
966 if (error == 0 && ap->a_count > 0) {
967 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
968 jrecord_write_vnode_ref(jrec, ap->a_vp);
969 save = jrecord_push(jrec, JTYPE_REDO);
970 jrecord_write_pagelist(jrec, JLEAF_FILEDATA, ap->a_m, ap->a_rtvals,
971 btoc(ap->a_count), ap->a_offset);
972 jrecord_pop(jrec, save);
975 jreclist_done(mp, &jreclist, error);
976 return (error);
980 * Journal vop_setacl { a_vp, a_type, a_aclp, a_cred }
982 static
984 journal_setacl(struct vop_setacl_args *ap)
986 struct jrecord_list jreclist;
987 struct jrecord jreccache;
988 struct jrecord *jrec;
989 struct mount *mp;
990 int error;
992 mp = ap->a_head.a_ops->head.vv_mount;
993 jreclist_init(mp, &jreclist, &jreccache, JTYPE_SETACL);
994 error = vop_journal_operate_ap(&ap->a_head);
995 if (error == 0) {
996 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
997 #if 0
998 if ((jo->flags & MC_JOURNAL_WANT_REVERSABLE))
999 jrecord_undo_file(jrec, ap->a_vp, JRUNDO_XXX, 0, 0);
1000 #endif
1001 jrecord_write_cred(jrec, curthread, ap->a_cred);
1002 jrecord_write_vnode_ref(jrec, ap->a_vp);
1003 #if 0
1004 save = jrecord_push(jrec, JTYPE_REDO);
1005 /* XXX type, aclp */
1006 jrecord_pop(jrec, save);
1007 #endif
1010 jreclist_done(mp, &jreclist, error);
1011 return (error);
1015 * Journal vop_setextattr { a_vp, a_name, a_uio, a_cred }
1017 static
1019 journal_setextattr(struct vop_setextattr_args *ap)
1021 struct jrecord_list jreclist;
1022 struct jrecord jreccache;
1023 struct jrecord *jrec;
1024 struct mount *mp;
1025 void *save;
1026 int error;
1028 mp = ap->a_head.a_ops->head.vv_mount;
1029 jreclist_init(mp, &jreclist, &jreccache, JTYPE_SETEXTATTR);
1030 error = vop_journal_operate_ap(&ap->a_head);
1031 if (error == 0) {
1032 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1033 #if 0
1034 if ((jo->flags & MC_JOURNAL_WANT_REVERSABLE))
1035 jrecord_undo_file(jrec, ap->a_vp, JRUNDO_XXX, 0, 0);
1036 #endif
1037 jrecord_write_cred(jrec, curthread, ap->a_cred);
1038 jrecord_write_vnode_ref(jrec, ap->a_vp);
1039 jrecord_leaf(jrec, JLEAF_ATTRNAME, ap->a_name, strlen(ap->a_name));
1040 save = jrecord_push(jrec, JTYPE_REDO);
1041 jrecord_write_uio(jrec, JLEAF_FILEDATA, ap->a_uio);
1042 jrecord_pop(jrec, save);
1045 jreclist_done(mp, &jreclist, error);
1046 return (error);
1050 * Journal vop_ncreate { a_nch, a_vpp, a_cred, a_vap }
1052 static
1054 journal_ncreate(struct vop_ncreate_args *ap)
1056 struct jrecord_list jreclist;
1057 struct jrecord jreccache;
1058 struct jrecord *jrec;
1059 struct mount *mp;
1060 void *save;
1061 int error;
1063 mp = ap->a_head.a_ops->head.vv_mount;
1064 jreclist_init(mp, &jreclist, &jreccache, JTYPE_CREATE);
1065 error = vop_journal_operate_ap(&ap->a_head);
1066 if (error == 0) {
1067 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1068 jrecord_write_cred(jrec, NULL, ap->a_cred);
1069 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_nch->ncp);
1070 if (*ap->a_vpp)
1071 jrecord_write_vnode_ref(jrec, *ap->a_vpp);
1072 save = jrecord_push(jrec, JTYPE_REDO);
1073 jrecord_write_vattr(jrec, ap->a_vap);
1074 jrecord_pop(jrec, save);
1077 jreclist_done(mp, &jreclist, error);
1078 return (error);
1082 * Journal vop_nmknod { a_nch, a_vpp, a_cred, a_vap }
1084 static
1086 journal_nmknod(struct vop_nmknod_args *ap)
1088 struct jrecord_list jreclist;
1089 struct jrecord jreccache;
1090 struct jrecord *jrec;
1091 struct mount *mp;
1092 void *save;
1093 int error;
1095 mp = ap->a_head.a_ops->head.vv_mount;
1096 jreclist_init(mp, &jreclist, &jreccache, JTYPE_MKNOD);
1097 error = vop_journal_operate_ap(&ap->a_head);
1098 if (error == 0) {
1099 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1100 jrecord_write_cred(jrec, NULL, ap->a_cred);
1101 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_nch->ncp);
1102 save = jrecord_push(jrec, JTYPE_REDO);
1103 jrecord_write_vattr(jrec, ap->a_vap);
1104 jrecord_pop(jrec, save);
1105 if (*ap->a_vpp)
1106 jrecord_write_vnode_ref(jrec, *ap->a_vpp);
1109 jreclist_done(mp, &jreclist, error);
1110 return (error);
1114 * Journal vop_nlink { a_nch, a_vp, a_cred }
1116 static
1118 journal_nlink(struct vop_nlink_args *ap)
1120 struct jrecord_list jreclist;
1121 struct jrecord jreccache;
1122 struct jrecord *jrec;
1123 struct mount *mp;
1124 void *save;
1125 int error;
1127 mp = ap->a_head.a_ops->head.vv_mount;
1128 jreclist_init(mp, &jreclist, &jreccache, JTYPE_LINK);
1129 error = vop_journal_operate_ap(&ap->a_head);
1130 if (error == 0) {
1131 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1132 jrecord_write_cred(jrec, NULL, ap->a_cred);
1133 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_nch->ncp);
1134 /* XXX PATH to VP and inode number */
1135 /* XXX this call may not record the correct path when
1136 * multiple paths are available */
1137 save = jrecord_push(jrec, JTYPE_REDO);
1138 jrecord_write_vnode_link(jrec, ap->a_vp, ap->a_nch->ncp);
1139 jrecord_pop(jrec, save);
1142 jreclist_done(mp, &jreclist, error);
1143 return (error);
1147 * Journal vop_symlink { a_nch, a_vpp, a_cred, a_vap, a_target }
1149 static
1151 journal_nsymlink(struct vop_nsymlink_args *ap)
1153 struct jrecord_list jreclist;
1154 struct jrecord jreccache;
1155 struct jrecord *jrec;
1156 struct mount *mp;
1157 void *save;
1158 int error;
1160 mp = ap->a_head.a_ops->head.vv_mount;
1161 jreclist_init(mp, &jreclist, &jreccache, JTYPE_SYMLINK);
1162 error = vop_journal_operate_ap(&ap->a_head);
1163 if (error == 0) {
1164 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1165 jrecord_write_cred(jrec, NULL, ap->a_cred);
1166 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_nch->ncp);
1167 save = jrecord_push(jrec, JTYPE_REDO);
1168 jrecord_leaf(jrec, JLEAF_SYMLINKDATA,
1169 ap->a_target, strlen(ap->a_target));
1170 jrecord_pop(jrec, save);
1171 if (*ap->a_vpp)
1172 jrecord_write_vnode_ref(jrec, *ap->a_vpp);
1175 jreclist_done(mp, &jreclist, error);
1176 return (error);
1180 * Journal vop_nwhiteout { a_nch, a_cred, a_flags }
1182 static
1184 journal_nwhiteout(struct vop_nwhiteout_args *ap)
1186 struct jrecord_list jreclist;
1187 struct jrecord jreccache;
1188 struct jrecord *jrec;
1189 struct mount *mp;
1190 int error;
1192 mp = ap->a_head.a_ops->head.vv_mount;
1193 jreclist_init(mp, &jreclist, &jreccache, JTYPE_WHITEOUT);
1194 error = vop_journal_operate_ap(&ap->a_head);
1195 if (error == 0) {
1196 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1197 jrecord_write_cred(jrec, NULL, ap->a_cred);
1198 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_nch->ncp);
1201 jreclist_done(mp, &jreclist, error);
1202 return (error);
1206 * Journal vop_nremove { a_nch, a_cred }
1208 static
1210 journal_nremove(struct vop_nremove_args *ap)
1212 struct jrecord_list jreclist;
1213 struct jrecord jreccache;
1214 struct jrecord *jrec;
1215 struct mount *mp;
1216 int error;
1218 mp = ap->a_head.a_ops->head.vv_mount;
1219 if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_REMOVE) &&
1220 ap->a_nch->ncp->nc_vp
1222 jreclist_undo_file(&jreclist, ap->a_nch->ncp->nc_vp,
1223 JRUNDO_ALL|JRUNDO_GETVP|JRUNDO_CONDLINK, 0, -1);
1225 error = vop_journal_operate_ap(&ap->a_head);
1226 if (error == 0) {
1227 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1228 jrecord_write_cred(jrec, NULL, ap->a_cred);
1229 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_nch->ncp);
1232 jreclist_done(mp, &jreclist, error);
1233 return (error);
1237 * Journal vop_nmkdir { a_nch, a_vpp, a_cred, a_vap }
1239 static
1241 journal_nmkdir(struct vop_nmkdir_args *ap)
1243 struct jrecord_list jreclist;
1244 struct jrecord jreccache;
1245 struct jrecord *jrec;
1246 struct mount *mp;
1247 int error;
1249 mp = ap->a_head.a_ops->head.vv_mount;
1250 jreclist_init(mp, &jreclist, &jreccache, JTYPE_MKDIR);
1251 error = vop_journal_operate_ap(&ap->a_head);
1252 if (error == 0) {
1253 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1254 #if 0
1255 if (jo->flags & MC_JOURNAL_WANT_AUDIT) {
1256 jrecord_write_audit(jrec);
1258 #endif
1259 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_nch->ncp);
1260 jrecord_write_cred(jrec, NULL, ap->a_cred);
1261 jrecord_write_vattr(jrec, ap->a_vap);
1262 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_nch->ncp);
1263 if (*ap->a_vpp)
1264 jrecord_write_vnode_ref(jrec, *ap->a_vpp);
1267 jreclist_done(mp, &jreclist, error);
1268 return (error);
1272 * Journal vop_nrmdir { a_nch, a_cred }
1274 static
1276 journal_nrmdir(struct vop_nrmdir_args *ap)
1278 struct jrecord_list jreclist;
1279 struct jrecord jreccache;
1280 struct jrecord *jrec;
1281 struct mount *mp;
1282 int error;
1284 mp = ap->a_head.a_ops->head.vv_mount;
1285 if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_RMDIR)) {
1286 jreclist_undo_file(&jreclist, ap->a_nch->ncp->nc_vp,
1287 JRUNDO_VATTR|JRUNDO_GETVP, 0, 0);
1289 error = vop_journal_operate_ap(&ap->a_head);
1290 if (error == 0) {
1291 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1292 jrecord_write_cred(jrec, NULL, ap->a_cred);
1293 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_nch->ncp);
1296 jreclist_done(mp, &jreclist, error);
1297 return (error);
1301 * Journal vop_nrename { a_fnch, a_tnch, a_cred }
1303 static
1305 journal_nrename(struct vop_nrename_args *ap)
1307 struct jrecord_list jreclist;
1308 struct jrecord jreccache;
1309 struct jrecord *jrec;
1310 struct mount *mp;
1311 int error;
1313 mp = ap->a_head.a_ops->head.vv_mount;
1314 if (jreclist_init(mp, &jreclist, &jreccache, JTYPE_RENAME) &&
1315 ap->a_tnch->ncp->nc_vp
1317 jreclist_undo_file(&jreclist, ap->a_tnch->ncp->nc_vp,
1318 JRUNDO_ALL|JRUNDO_GETVP|JRUNDO_CONDLINK, 0, -1);
1320 error = vop_journal_operate_ap(&ap->a_head);
1321 if (error == 0) {
1322 TAILQ_FOREACH(jrec, &jreclist.list, user_entry) {
1323 jrecord_write_cred(jrec, NULL, ap->a_cred);
1324 jrecord_write_path(jrec, JLEAF_PATH1, ap->a_fnch->ncp);
1325 jrecord_write_path(jrec, JLEAF_PATH2, ap->a_tnch->ncp);
1328 jreclist_done(mp, &jreclist, error);
1329 return (error);