2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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
41 #define SERIALBUF_SIZE (512 * 1024)
43 typedef struct histogram
{
48 const char *ScoreBoardFile
;
49 const char *RestrictTarget
;
51 static int read_mrecords(int fd
, char *buf
, u_int size
,
52 hammer_ioc_mrecord_head_t pickup
);
53 static int generate_histogram(int fd
, const char *filesystem
,
54 histogram_t
*histogram_ary
,
55 struct hammer_ioc_mirror_rw
*mirror_base
,
57 static hammer_ioc_mrecord_any_t
read_mrecord(int fdin
, int *errorp
,
58 hammer_ioc_mrecord_head_t pickup
);
59 static void write_mrecord(int fdout
, uint32_t type
,
60 hammer_ioc_mrecord_any_t mrec
, int bytes
);
61 static void generate_mrec_header(int fd
, int pfs_id
,
62 union hammer_ioc_mrecord_any
*mrec_tmp
);
63 static int validate_mrec_header(int fd
, int fdin
, int is_target
, int pfs_id
,
64 struct hammer_ioc_mrecord_head
*pickup
,
65 hammer_tid_t
*tid_begp
, hammer_tid_t
*tid_endp
);
66 static void update_pfs_snapshot(int fd
, hammer_tid_t snapshot_tid
, int pfs_id
);
67 static ssize_t
writebw(int fd
, const void *buf
, size_t nbytes
,
68 uint64_t *bwcount
, struct timeval
*tv1
);
69 static int getyntty(void);
70 static void score_printf(size_t i
, size_t w
, const char *ctl
, ...);
71 static void hammer_check_restrict(const char *filesystem
);
72 static void mirror_usage(int code
);
75 * Generate a mirroring data stream from the specific source over the
76 * entire key range, but restricted to the specified transaction range.
78 * The HAMMER VFS does most of the work, we add a few new mrecord
79 * types to negotiate the TID ranges and verify that the entire
80 * stream made it to the destination.
82 * streaming will be 0 for mirror-read, 1 for mirror-stream. The code will
83 * set up a fake value of -1 when running the histogram for mirror-read.
86 hammer_cmd_mirror_read(char **av
, int ac
, int streaming
)
88 struct hammer_ioc_mirror_rw mirror
;
89 struct hammer_ioc_pseudofs_rw pfs
;
90 union hammer_ioc_mrecord_any mrec_tmp
;
91 struct hammer_ioc_mrecord_head pickup
;
92 hammer_ioc_mrecord_any_t mrec
;
93 hammer_tid_t sync_tid
;
94 histogram_t histogram_ary
;
95 const char *filesystem
;
96 char *buf
= malloc(SERIALBUF_SIZE
);
108 time_t base_t
= time(NULL
);
113 if (ac
== 0 || ac
> 2)
116 hammer_check_restrict(filesystem
);
118 pickup
.signature
= 0;
123 histogram_ary
= NULL
;
127 bzero(&mirror
, sizeof(mirror
));
128 hammer_key_beg_init(&mirror
.key_beg
);
129 hammer_key_end_init(&mirror
.key_end
);
131 fd
= getpfs(&pfs
, filesystem
);
134 score_printf(LINE1
, "Running");
136 if (streaming
>= 0 && VerboseOpt
&& VerboseOpt
< 2) {
137 fprintf(stderr
, "%cRunning \b\b", (sameline
? '\r' : '\n'));
143 gettimeofday(&bwtv
, NULL
);
147 * Send initial header for the purpose of determining the
150 generate_mrec_header(fd
, pfs
.pfs_id
, &mrec_tmp
);
151 write_mrecord(1, HAMMER_MREC_TYPE_PFSD
,
152 &mrec_tmp
, sizeof(mrec_tmp
.pfs
));
155 * In 2-way mode the target will send us a PFS info packet
156 * first. Use the target's current snapshot TID as our default
161 n
= validate_mrec_header(fd
, 0, 0, pfs
.pfs_id
, &pickup
,
162 NULL
, &mirror
.tid_beg
);
163 if (n
< 0) { /* got TERM record */
170 } else if (streaming
&& histogram
) {
171 mirror
.tid_beg
= histogram_ary
[histindex
].tid
+ 1;
177 * Write out the PFS header, tid_beg will be updated if our PFS
178 * has a larger begin sync. tid_end is set to the latest source
179 * TID whos flush cycle has completed.
181 generate_mrec_header(fd
, pfs
.pfs_id
, &mrec_tmp
);
182 if (mirror
.tid_beg
< mrec_tmp
.pfs
.pfsd
.sync_beg_tid
)
183 mirror
.tid_beg
= mrec_tmp
.pfs
.pfsd
.sync_beg_tid
;
184 mirror
.tid_end
= mrec_tmp
.pfs
.pfsd
.sync_end_tid
;
186 mirror
.size
= SERIALBUF_SIZE
;
187 mirror
.pfs_id
= pfs
.pfs_id
;
188 mirror
.shared_uuid
= pfs
.ondisk
->shared_uuid
;
191 * XXX If the histogram is exhausted and the TID delta is large
192 * the stream might have been offline for a while and is
193 * now picking it up again. Do another histogram.
196 if (streaming
&& histogram
&& histindex
== histend
) {
197 if (mirror
.tid_end
- mirror
.tid_beg
> BULK_MINIMUM
)
203 * Initial bulk startup control, try to do some incremental
204 * mirroring in order to allow the stream to be killed and
205 * restarted without having to start over.
207 if (histogram
== 0 && BulkOpt
== 0) {
208 if (VerboseOpt
&& repeat
== 0) {
209 fprintf(stderr
, "\n");
212 histmax
= generate_histogram(fd
, filesystem
,
213 &histogram_ary
, &mirror
,
219 * Just stream the histogram, then stop
225 if (streaming
&& histogram
) {
227 mirror
.tid_end
= histogram_ary
[histindex
].tid
;
228 estbytes
= histogram_ary
[histindex
-1].bytes
;
229 mrec_tmp
.pfs
.pfsd
.sync_end_tid
= mirror
.tid_end
;
234 write_mrecord(1, HAMMER_MREC_TYPE_PFSD
,
235 &mrec_tmp
, sizeof(mrec_tmp
.pfs
));
238 * A cycle file overrides the beginning TID only if we are
239 * not operating in two-way or histogram mode.
241 if (TwoWayPipeOpt
== 0 && histogram
== 0) {
242 hammer_get_cycle(&mirror
.key_beg
, &mirror
.tid_beg
);
246 * An additional argument overrides the beginning TID regardless
247 * of what mode we are in. This is not recommending if operating
251 mirror
.tid_beg
= strtoull(av
[1], NULL
, 0);
253 if (streaming
== 0 || VerboseOpt
>= 2) {
255 "Mirror-read: Mirror %016jx to %016jx",
256 (uintmax_t)mirror
.tid_beg
, (uintmax_t)mirror
.tid_end
);
258 fprintf(stderr
, " (bulk= %ju)", (uintmax_t)estbytes
);
259 fprintf(stderr
, "\n");
262 if (mirror
.key_beg
.obj_id
!= (int64_t)HAMMER_MIN_OBJID
) {
263 fprintf(stderr
, "Mirror-read: Resuming at object %016jx\n",
264 (uintmax_t)mirror
.key_beg
.obj_id
);
268 * Nothing to do if begin equals end.
270 if (mirror
.tid_beg
>= mirror
.tid_end
) {
271 if (streaming
== 0 || VerboseOpt
>= 2)
272 fprintf(stderr
, "Mirror-read: No work to do\n");
281 * Write out bulk records
284 mirror
.size
= SERIALBUF_SIZE
;
288 mirror
.pfs_id
= pfs
.pfs_id
;
289 mirror
.shared_uuid
= pfs
.ondisk
->shared_uuid
;
290 if (ioctl(fd
, HAMMERIOC_MIRROR_READ
, &mirror
) < 0) {
291 score_printf(LINE3
, "Mirror-read %s failed: %s",
292 filesystem
, strerror(errno
));
293 fprintf(stderr
, "Mirror-read %s failed: %s\n",
294 filesystem
, strerror(errno
));
297 if (mirror
.head
.flags
& HAMMER_IOC_HEAD_ERROR
) {
298 score_printf(LINE3
, "Mirror-read %s fatal error %d",
299 filesystem
, mirror
.head
.error
);
301 "Mirror-read %s fatal error %d\n",
302 filesystem
, mirror
.head
.error
);
307 n
= writebw(1, mirror
.ubuf
, mirror
.count
,
310 n
= write(1, mirror
.ubuf
, mirror
.count
);
312 if (n
!= mirror
.count
) {
314 "Mirror-read %s failed: "
318 "Mirror-read %s failed: "
324 total_bytes
+= mirror
.count
;
325 if (streaming
&& VerboseOpt
) {
327 "\rscan obj=%016jx tids=%016jx:%016jx %11jd",
328 (uintmax_t)mirror
.key_cur
.obj_id
,
329 (uintmax_t)mirror
.tid_beg
,
330 (uintmax_t)mirror
.tid_end
,
331 (intmax_t)total_bytes
);
334 } else if (streaming
) {
336 "obj=%016jx tids=%016jx:%016jx %11jd",
337 (uintmax_t)mirror
.key_cur
.obj_id
,
338 (uintmax_t)mirror
.tid_beg
,
339 (uintmax_t)mirror
.tid_end
,
340 (intmax_t)total_bytes
);
342 mirror
.key_beg
= mirror
.key_cur
;
345 * Deal with time limit option
348 (unsigned)(time(NULL
) - base_t
) > (unsigned)TimeoutOpt
) {
350 "Mirror-read %s interrupted by timer at"
353 (uintmax_t)mirror
.key_cur
.obj_id
);
355 "Mirror-read %s interrupted by timer at"
358 (uintmax_t)mirror
.key_cur
.obj_id
);
362 } while (mirror
.count
!= 0);
365 if (streaming
&& VerboseOpt
&& sameline
== 0) {
366 fprintf(stderr
, "\n");
372 * Write out the termination sync record - only if not interrupted
374 if (interrupted
== 0) {
376 write_mrecord(1, HAMMER_MREC_TYPE_SYNC
,
377 &mrec_tmp
, sizeof(mrec_tmp
.sync
));
379 write_mrecord(1, HAMMER_MREC_TYPE_IDLE
,
380 &mrec_tmp
, sizeof(mrec_tmp
.sync
));
385 * If the -2 option was given (automatic when doing mirror-copy),
386 * a two-way pipe is assumed and we expect a response mrec from
390 mrec
= read_mrecord(0, &error
, &pickup
);
392 mrec
->head
.type
!= HAMMER_MREC_TYPE_UPDATE
||
393 mrec
->head
.rec_size
!= sizeof(mrec
->update
)) {
394 fprintf(stderr
, "mirror_read: Did not get final "
395 "acknowledgement packet from target\n");
400 hammer_set_cycle(&mirror
.key_cur
,
402 fprintf(stderr
, "Cyclefile %s updated for "
403 "continuation\n", CyclePath
);
406 sync_tid
= mrec
->update
.tid
;
408 hammer_key_beg_init(&mirror
.key_beg
);
409 hammer_set_cycle(&mirror
.key_beg
, sync_tid
);
411 "Cyclefile %s updated to 0x%016jx\n",
412 CyclePath
, (uintmax_t)sync_tid
);
416 } else if (CyclePath
) {
417 /* NOTE! mirror.tid_beg cannot be updated */
418 fprintf(stderr
, "Warning: cycle file (-c option) cannot be "
419 "fully updated unless you use mirror-copy\n");
420 hammer_set_cycle(&mirror
.key_beg
, mirror
.tid_beg
);
422 if (streaming
&& interrupted
== 0) {
423 time_t t1
= time(NULL
);
427 * Try to break down large bulk transfers into smaller ones
428 * so it can sync the transaction id on the slave. This
429 * way if we get interrupted a restart doesn't have to
430 * start from scratch.
432 if (streaming
&& histogram
) {
433 if (histindex
!= histmax
) {
434 if (VerboseOpt
&& VerboseOpt
< 2 &&
436 fprintf(stderr
, " (bulk incremental)");
443 if (VerboseOpt
&& streaming
>= 0) {
444 fprintf(stderr
, " W");
446 } else if (streaming
>= 0) {
447 score_printf(LINE1
, "Waiting");
449 pfs
.ondisk
->sync_end_tid
= mirror
.tid_end
;
452 * Fake streaming mode when using a histogram to
453 * break up a mirror-read, do not wait on source.
456 } else if (ioctl(fd
, HAMMERIOC_WAI_PSEUDOFS
, &pfs
) < 0) {
458 "Mirror-read %s: cannot stream: %s\n",
459 filesystem
, strerror(errno
));
461 "Mirror-read %s: cannot stream: %s\n",
462 filesystem
, strerror(errno
));
464 t2
= time(NULL
) - t1
;
465 if (t2
>= 0 && t2
< DelayOpt
) {
467 fprintf(stderr
, "\bD");
470 sleep(DelayOpt
- t2
);
473 fprintf(stderr
, "\b ");
480 write_mrecord(1, HAMMER_MREC_TYPE_TERM
,
481 &mrec_tmp
, sizeof(mrec_tmp
.sync
));
485 fprintf(stderr
, "Mirror-read %s succeeded\n", filesystem
);
489 * What we are trying to do here is figure out how much data is
490 * going to be sent for the TID range and to break the TID range
491 * down into reasonably-sized slices (from the point of view of
492 * data sent) so a lost connection can restart at a reasonable
493 * place and not all the way back at the beginning.
495 * An entry's TID serves as the end_tid for the prior entry
496 * So we have to offset the calculation by 1 so that TID falls into
497 * the previous entry when populating entries.
499 * Because the transaction id space is bursty we need a relatively
500 * large number of buckets (like a million) to do a reasonable job
501 * for things like an initial bulk mirrors on a very large filesystem.
503 #define HIST_COUNT (1024 * 1024)
506 generate_histogram(int fd
, const char *filesystem
,
507 histogram_t
*histogram_ary
,
508 struct hammer_ioc_mirror_rw
*mirror_base
,
511 struct hammer_ioc_mirror_rw mirror
;
512 union hammer_ioc_mrecord_any
*mrec
;
513 hammer_tid_t tid_beg
;
514 hammer_tid_t tid_end
;
526 mirror
= *mirror_base
;
527 tid_beg
= mirror
.tid_beg
;
528 tid_end
= mirror
.tid_end
;
529 mirror
.head
.flags
|= HAMMER_IOC_MIRROR_NODATA
;
531 if (*histogram_ary
== NULL
) {
532 *histogram_ary
= malloc(sizeof(struct histogram
) *
535 if (tid_beg
>= tid_end
)
539 tid_bytes
= malloc(sizeof(*tid_bytes
) * (HIST_COUNT
+ 2));
540 bzero(tid_bytes
, sizeof(*tid_bytes
) * (HIST_COUNT
+ 2));
543 fprintf(stderr
, "Prescan to break up bulk transfer");
545 fprintf(stderr
, " (%juMB chunks)",
546 (uintmax_t)(SplitupOpt
/ (1024 * 1024)));
547 fprintf(stderr
, "\n");
551 * Note: (tid_beg,tid_end), range is inclusive of both beg & end.
553 * Note: Estimates can be off when the mirror is way behind due
561 if (ioctl(fd
, HAMMERIOC_MIRROR_READ
, &mirror
) < 0) {
562 fprintf(stderr
, "Mirror-read %s failed: %s\n",
563 filesystem
, strerror(errno
));
566 if (mirror
.head
.flags
& HAMMER_IOC_HEAD_ERROR
) {
568 "Mirror-read %s fatal error %d\n",
569 filesystem
, mirror
.head
.error
);
574 off
+= HAMMER_HEAD_DOALIGN(mrec
->head
.rec_size
)) {
575 mrec
= (void *)((char *)mirror
.ubuf
+ off
);
578 * We only care about general RECs and PASS
579 * records. We ignore SKIPs.
581 switch (mrec
->head
.type
& HAMMER_MRECF_TYPE_LOMASK
) {
582 case HAMMER_MREC_TYPE_REC
:
583 case HAMMER_MREC_TYPE_PASS
:
590 * Calculate for two indices, create_tid and
591 * delete_tid. Record data only applies to
594 * When tid is exactly on the boundary it really
595 * belongs to the previous entry because scans
596 * are inclusive of the ending entry.
598 tid
= mrec
->rec
.leaf
.base
.delete_tid
;
599 if (tid
&& tid
>= tid_beg
&& tid
<= tid_end
) {
600 len
= HAMMER_HEAD_DOALIGN(mrec
->head
.rec_size
);
601 if (mrec
->head
.type
==
602 HAMMER_MREC_TYPE_REC
) {
603 len
-= HAMMER_HEAD_DOALIGN(
604 mrec
->rec
.leaf
.data_len
);
607 i
= (tid
- tid_beg
) * HIST_COUNT
/
609 tidx
= tid_beg
+ i
* (tid_end
- tid_beg
) /
611 if (tid
== tidx
&& i
)
613 assert(i
>= 0 && i
< HIST_COUNT
);
619 tid
= mrec
->rec
.leaf
.base
.create_tid
;
620 if (tid
&& tid
>= tid_beg
&& tid
<= tid_end
) {
621 len
= HAMMER_HEAD_DOALIGN(mrec
->head
.rec_size
);
622 if (mrec
->head
.type
==
623 HAMMER_MREC_TYPE_REC_NODATA
) {
624 len
+= HAMMER_HEAD_DOALIGN(
625 mrec
->rec
.leaf
.data_len
);
627 i
= (tid
- tid_beg
) * HIST_COUNT
/
629 tidx
= tid_beg
+ i
* (tid_end
- tid_beg
) /
631 if (tid
== tidx
&& i
)
633 assert(i
>= 0 && i
< HIST_COUNT
);
639 if (*repeatp
== 0 && accum
> SplitupOpt
) {
640 if (VerboseOpt
> 1) {
641 fprintf(stderr
, ".");
645 score_printf(LINE2
, "Prescan chunk %d", chunkno
);
648 if (mirror
.count
== 0)
650 mirror
.key_beg
= mirror
.key_cur
;
654 * Reduce to SplitupOpt (default 4GB) chunks. This code may
655 * use up to two additional elements. Do the array in-place.
657 * Inefficient degenerate cases can occur if we do not accumulate
658 * at least the requested split amount, so error on the side of
662 (*histogram_ary
)[res
].tid
= tid_beg
;
663 (*histogram_ary
)[res
].bytes
= tid_bytes
[0];
664 for (i
= 1; i
< HIST_COUNT
; ++i
) {
665 if ((*histogram_ary
)[res
].bytes
>= SplitupOpt
) {
667 (*histogram_ary
)[res
].tid
= tid_beg
+
668 i
* (tid_end
- tid_beg
) /
670 (*histogram_ary
)[res
].bytes
= 0;
673 (*histogram_ary
)[res
].bytes
+= tid_bytes
[i
];
676 (*histogram_ary
)[res
].tid
= tid_end
;
677 (*histogram_ary
)[res
].bytes
= -1;
681 fprintf(stderr
, "\n"); /* newline after ... */
682 score_printf(LINE3
, "Prescan %d chunks, total %ju MBytes",
683 res
, (uintmax_t)total
/ (1024 * 1024));
684 fprintf(stderr
, "Prescan %d chunks, total %ju MBytes (",
685 res
, (uintmax_t)total
/ (1024 * 1024));
686 for (i
= 0; i
< res
&& i
< 3; ++i
) {
688 fprintf(stderr
, ", ");
689 fprintf(stderr
, "%ju",
690 (uintmax_t)(*histogram_ary
)[i
].bytes
);
693 fprintf(stderr
, ", ...");
694 fprintf(stderr
, ")\n");
696 assert(res
<= HIST_COUNT
);
704 create_pfs(const char *filesystem
, uuid_t
*s_uuid
)
706 if (ForceYesOpt
== 1) {
707 fprintf(stderr
, "PFS slave %s does not exist. "
708 "Auto create new slave PFS!\n", filesystem
);
711 fprintf(stderr
, "PFS slave %s does not exist.\n"
712 "Do you want to create a new slave PFS? [y/n] ",
715 if (getyntty() != 1) {
716 fprintf(stderr
, "Aborting operation\n");
722 char *shared_uuid
= NULL
;
723 uuid_to_string(s_uuid
, &shared_uuid
, &status
);
726 asprintf(&cmd
, "/sbin/hammer pfs-slave '%s' shared-uuid=%s 1>&2",
727 filesystem
, shared_uuid
);
731 fprintf(stderr
, "Failed to alloc memory\n");
734 if (system(cmd
) != 0) {
735 fprintf(stderr
, "Failed to create PFS\n");
741 * Pipe the mirroring data stream on stdin to the HAMMER VFS, adding
742 * some additional packet types to negotiate TID ranges and to verify
743 * completion. The HAMMER VFS does most of the work.
745 * It is important to note that the mirror.key_{beg,end} range must
746 * match the ranged used by the original. For now both sides use
747 * range the entire key space.
749 * It is even more important that the records in the stream conform
750 * to the TID range also supplied in the stream. The HAMMER VFS will
751 * use the REC, PASS, and SKIP record types to track the portions of
752 * the B-Tree being scanned in order to be able to proactively delete
753 * records on the target within those active areas that are not mentioned
756 * The mirror.key_cur field is used by the VFS to do this tracking. It
757 * must be initialized to key_beg but then is persistently updated by
758 * the HAMMER VFS on each successive ioctl() call. If you blow up this
759 * field you will blow up the mirror target, possibly to the point of
760 * deleting everything. As a safety measure the HAMMER VFS simply marks
761 * the records that the source has destroyed as deleted on the target,
762 * and normal pruning operations will deal with their final disposition
763 * at some later time.
766 hammer_cmd_mirror_write(char **av
, int ac
)
768 struct hammer_ioc_mirror_rw mirror
;
769 const char *filesystem
;
770 char *buf
= malloc(SERIALBUF_SIZE
);
771 struct hammer_ioc_pseudofs_rw pfs
;
772 struct hammer_ioc_mrecord_head pickup
;
773 struct hammer_ioc_synctid synctid
;
774 union hammer_ioc_mrecord_any mrec_tmp
;
775 hammer_ioc_mrecord_any_t mrec
;
784 hammer_check_restrict(filesystem
);
786 pickup
.signature
= 0;
790 bzero(&mirror
, sizeof(mirror
));
791 hammer_key_beg_init(&mirror
.key_beg
);
792 hammer_key_end_init(&mirror
.key_end
);
793 mirror
.key_end
= mirror
.key_beg
;
796 * Read initial packet
798 mrec
= read_mrecord(0, &error
, &pickup
);
801 fprintf(stderr
, "validate_mrec_header: short read\n");
807 if (mrec
->head
.type
== HAMMER_MREC_TYPE_TERM
) {
811 if (mrec
->head
.type
!= HAMMER_MREC_TYPE_PFSD
) {
812 fprintf(stderr
, "validate_mrec_header: did not get expected "
813 "PFSD record type\n");
816 if (mrec
->head
.rec_size
!= sizeof(mrec
->pfs
)) {
817 fprintf(stderr
, "validate_mrec_header: unexpected payload "
823 * Create slave PFS if it doesn't yet exist
825 if (lstat(filesystem
, &st
) != 0) {
826 create_pfs(filesystem
, &mrec
->pfs
.pfsd
.shared_uuid
);
831 fd
= getpfs(&pfs
, filesystem
);
834 * In two-way mode the target writes out a PFS packet first.
835 * The source uses our tid_end as its tid_beg by default,
836 * picking up where it left off.
840 generate_mrec_header(fd
, pfs
.pfs_id
, &mrec_tmp
);
841 if (mirror
.tid_beg
< mrec_tmp
.pfs
.pfsd
.sync_beg_tid
)
842 mirror
.tid_beg
= mrec_tmp
.pfs
.pfsd
.sync_beg_tid
;
843 mirror
.tid_end
= mrec_tmp
.pfs
.pfsd
.sync_end_tid
;
844 write_mrecord(1, HAMMER_MREC_TYPE_PFSD
,
845 &mrec_tmp
, sizeof(mrec_tmp
.pfs
));
849 * Read and process the PFS header. The source informs us of
850 * the TID range the stream represents.
852 n
= validate_mrec_header(fd
, 0, 1, pfs
.pfs_id
, &pickup
,
853 &mirror
.tid_beg
, &mirror
.tid_end
);
854 if (n
< 0) { /* got TERM record */
861 mirror
.size
= SERIALBUF_SIZE
;
864 * Read and process bulk records (REC, PASS, and SKIP types).
866 * On your life, do NOT mess with mirror.key_cur or your mirror
867 * target may become history.
871 mirror
.pfs_id
= pfs
.pfs_id
;
872 mirror
.shared_uuid
= pfs
.ondisk
->shared_uuid
;
873 mirror
.size
= read_mrecords(0, buf
, SERIALBUF_SIZE
, &pickup
);
874 if (mirror
.size
<= 0)
876 if (ioctl(fd
, HAMMERIOC_MIRROR_WRITE
, &mirror
) < 0) {
877 fprintf(stderr
, "Mirror-write %s failed: %s\n",
878 filesystem
, strerror(errno
));
881 if (mirror
.head
.flags
& HAMMER_IOC_HEAD_ERROR
) {
883 "Mirror-write %s fatal error %d\n",
884 filesystem
, mirror
.head
.error
);
888 if (mirror
.head
.flags
& HAMMER_IOC_HEAD_INTR
) {
890 "Mirror-write %s interrupted by timer at"
893 mirror
.key_cur
.obj_id
);
900 * Read and process the termination sync record.
902 mrec
= read_mrecord(0, &error
, &pickup
);
904 if (mrec
&& mrec
->head
.type
== HAMMER_MREC_TYPE_TERM
) {
905 fprintf(stderr
, "Mirror-write: received termination request\n");
913 (mrec
->head
.type
!= HAMMER_MREC_TYPE_SYNC
&&
914 mrec
->head
.type
!= HAMMER_MREC_TYPE_IDLE
) ||
915 mrec
->head
.rec_size
!= sizeof(mrec
->sync
)) {
916 fprintf(stderr
, "Mirror-write %s: Did not get termination "
917 "sync record, or rec_size is wrong rt=%d\n",
919 (mrec
? (int)mrec
->head
.type
: -1));
924 * Update the PFS info on the target so the user has visibility
925 * into the new snapshot, and sync the target filesystem.
927 if (mrec
->head
.type
== HAMMER_MREC_TYPE_SYNC
) {
928 update_pfs_snapshot(fd
, mirror
.tid_end
, pfs
.pfs_id
);
930 bzero(&synctid
, sizeof(synctid
));
931 synctid
.op
= HAMMER_SYNCTID_SYNC2
;
932 ioctl(fd
, HAMMERIOC_SYNCTID
, &synctid
);
934 if (VerboseOpt
>= 2) {
935 fprintf(stderr
, "Mirror-write %s: succeeded\n",
944 * Report back to the originator.
947 mrec_tmp
.update
.tid
= mirror
.tid_end
;
948 write_mrecord(1, HAMMER_MREC_TYPE_UPDATE
,
949 &mrec_tmp
, sizeof(mrec_tmp
.update
));
951 printf("Source can update synctid to 0x%016jx\n",
952 (uintmax_t)mirror
.tid_end
);
959 hammer_cmd_mirror_dump(char **av
, int ac
)
961 char *buf
= malloc(SERIALBUF_SIZE
);
962 struct hammer_ioc_mrecord_head pickup
;
963 hammer_ioc_mrecord_any_t mrec
;
970 if (ac
== 1 && strcmp(*av
, "header") == 0)
976 * Read and process the PFS header
978 pickup
.signature
= 0;
981 mrec
= read_mrecord(0, &error
, &pickup
);
984 * Dump the PFS header. mirror-dump takes its input from the output
985 * of a mirror-read so getpfs() can't be used to get a fd to be passed
988 if (header_only
&& mrec
!= NULL
) {
989 dump_pfsd(&mrec
->pfs
.pfsd
, -1);
998 * Read and process bulk records
1001 size
= read_mrecords(0, buf
, SERIALBUF_SIZE
, &pickup
);
1005 while (offset
< size
) {
1006 mrec
= (void *)((char *)buf
+ offset
);
1007 bytes
= HAMMER_HEAD_DOALIGN(mrec
->head
.rec_size
);
1008 if (offset
+ bytes
> size
) {
1009 fprintf(stderr
, "Misaligned record\n");
1013 switch(mrec
->head
.type
& HAMMER_MRECF_TYPE_MASK
) {
1014 case HAMMER_MREC_TYPE_REC_BADCRC
:
1015 case HAMMER_MREC_TYPE_REC
:
1016 printf("Record lo=%08x obj=%016jx key=%016jx "
1018 mrec
->rec
.leaf
.base
.localization
,
1019 (uintmax_t)mrec
->rec
.leaf
.base
.obj_id
,
1020 (uintmax_t)mrec
->rec
.leaf
.base
.key
,
1021 mrec
->rec
.leaf
.base
.rec_type
,
1022 mrec
->rec
.leaf
.base
.obj_type
);
1023 if (mrec
->head
.type
==
1024 HAMMER_MREC_TYPE_REC_BADCRC
) {
1025 printf(" (BAD CRC)");
1028 printf(" tids %016jx:%016jx data=%d\n",
1029 (uintmax_t)mrec
->rec
.leaf
.base
.create_tid
,
1030 (uintmax_t)mrec
->rec
.leaf
.base
.delete_tid
,
1031 mrec
->rec
.leaf
.data_len
);
1033 case HAMMER_MREC_TYPE_PASS
:
1034 printf("Pass lo=%08x obj=%016jx key=%016jx "
1035 "rt=%02x ot=%02x\n",
1036 mrec
->rec
.leaf
.base
.localization
,
1037 (uintmax_t)mrec
->rec
.leaf
.base
.obj_id
,
1038 (uintmax_t)mrec
->rec
.leaf
.base
.key
,
1039 mrec
->rec
.leaf
.base
.rec_type
,
1040 mrec
->rec
.leaf
.base
.obj_type
);
1041 printf(" tids %016jx:%016jx data=%d\n",
1042 (uintmax_t)mrec
->rec
.leaf
.base
.create_tid
,
1043 (uintmax_t)mrec
->rec
.leaf
.base
.delete_tid
,
1044 mrec
->rec
.leaf
.data_len
);
1046 case HAMMER_MREC_TYPE_SKIP
:
1047 printf("Skip lo=%08x obj=%016jx key=%016jx rt=%02x to\n"
1048 " lo=%08x obj=%016jx key=%016jx rt=%02x\n",
1049 mrec
->skip
.skip_beg
.localization
,
1050 (uintmax_t)mrec
->skip
.skip_beg
.obj_id
,
1051 (uintmax_t)mrec
->skip
.skip_beg
.key
,
1052 mrec
->skip
.skip_beg
.rec_type
,
1053 mrec
->skip
.skip_end
.localization
,
1054 (uintmax_t)mrec
->skip
.skip_end
.obj_id
,
1055 (uintmax_t)mrec
->skip
.skip_end
.key
,
1056 mrec
->skip
.skip_end
.rec_type
);
1065 * Read and process the termination sync record.
1067 mrec
= read_mrecord(0, &error
, &pickup
);
1069 (mrec
->head
.type
!= HAMMER_MREC_TYPE_SYNC
&&
1070 mrec
->head
.type
!= HAMMER_MREC_TYPE_IDLE
)) {
1071 fprintf(stderr
, "Mirror-dump: Did not get termination "
1077 * Continue with more batches until EOF.
1079 mrec
= read_mrecord(0, &error
, &pickup
);
1088 hammer_cmd_mirror_copy(char **av
, int ac
, int streaming
)
1093 const char *xav
[32];
1095 char *sh
, *user
, *host
, *rfs
;
1102 signal(SIGPIPE
, SIG_IGN
);
1105 if (pipe(fds
) < 0) {
1113 if ((pid1
= fork()) == 0) {
1114 signal(SIGPIPE
, SIG_DFL
);
1119 if ((rfs
= strchr(av
[0], ':')) != NULL
) {
1122 if((sh
= getenv("HAMMER_RSH")) == NULL
)
1130 if ((host
= strchr(av
[0], '@')) != NULL
) {
1131 user
= strndup( av
[0], (host
++ - av
[0]));
1132 host
= strndup( host
, (rfs
++ - host
));
1138 host
= strndup( av
[0], (rfs
++ - av
[0]));
1146 xav
[xac
++] = SshPort
;
1149 xav
[xac
++] = "hammer";
1151 switch(VerboseOpt
) {
1161 xav
[xac
++] = "-vvv";
1169 snprintf(tbuf
, sizeof(tbuf
), "%d", TimeoutOpt
);
1173 if (SplitupOptStr
) {
1175 xav
[xac
++] = SplitupOptStr
;
1178 xav
[xac
++] = "mirror-read-stream";
1180 xav
[xac
++] = "mirror-read";
1183 execvp(*xav
, (void *)xav
);
1185 hammer_cmd_mirror_read(av
, 1, streaming
);
1195 if ((pid2
= fork()) == 0) {
1196 signal(SIGPIPE
, SIG_DFL
);
1201 if ((rfs
= strchr(av
[1], ':')) != NULL
) {
1204 if((sh
= getenv("HAMMER_RSH")) == NULL
)
1212 if ((host
= strchr(av
[1], '@')) != NULL
) {
1213 user
= strndup( av
[1], (host
++ - av
[1]));
1214 host
= strndup( host
, (rfs
++ - host
));
1220 host
= strndup( av
[1], (rfs
++ - av
[1]));
1227 xav
[xac
++] = SshPort
;
1230 xav
[xac
++] = "hammer";
1232 switch(VerboseOpt
) {
1242 xav
[xac
++] = "-vvv";
1249 xav
[xac
++] = "mirror-write";
1252 execvp(*xav
, (void *)xav
);
1254 hammer_cmd_mirror_write(av
+ 1, 1);
1263 while (waitpid(pid1
, NULL
, 0) <= 0)
1265 while (waitpid(pid2
, NULL
, 0) <= 0)
1269 * If the link is lost restart
1273 fprintf(stderr
, "\nLost Link\n");
1276 sleep(15 + DelayOpt
);
1283 * Read and return multiple mrecords
1286 read_mrecords(int fd
, char *buf
, u_int size
, hammer_ioc_mrecord_head_t pickup
)
1288 hammer_ioc_mrecord_any_t mrec
;
1296 while (size
- count
>= HAMMER_MREC_HEADSIZE
) {
1298 * Cached the record header in case we run out of buffer
1302 if (pickup
->signature
== 0) {
1303 for (n
= 0; n
< HAMMER_MREC_HEADSIZE
; n
+= i
) {
1304 i
= read(fd
, (char *)pickup
+ n
,
1305 HAMMER_MREC_HEADSIZE
- n
);
1311 if (n
!= HAMMER_MREC_HEADSIZE
) {
1312 fprintf(stderr
, "read_mrecords: short read on pipe\n");
1315 if (pickup
->signature
!= HAMMER_IOC_MIRROR_SIGNATURE
) {
1316 fprintf(stderr
, "read_mrecords: malformed record on pipe, "
1321 if (pickup
->rec_size
< HAMMER_MREC_HEADSIZE
||
1322 pickup
->rec_size
> sizeof(*mrec
) + HAMMER_XBUFSIZE
) {
1323 fprintf(stderr
, "read_mrecords: malformed record on pipe, "
1324 "illegal rec_size\n");
1329 * Stop if we have insufficient space for the record and data.
1331 bytes
= HAMMER_HEAD_DOALIGN(pickup
->rec_size
);
1332 if (size
- count
< bytes
)
1336 * Stop if the record type is not a REC, SKIP, or PASS,
1337 * which are the only types the ioctl supports. Other types
1338 * are used only by the userland protocol.
1342 type
= pickup
->type
& HAMMER_MRECF_TYPE_LOMASK
;
1343 if (type
!= HAMMER_MREC_TYPE_PFSD
&&
1344 type
!= HAMMER_MREC_TYPE_REC
&&
1345 type
!= HAMMER_MREC_TYPE_SKIP
&&
1346 type
!= HAMMER_MREC_TYPE_PASS
) {
1351 * Read the remainder and clear the pickup signature.
1353 for (n
= HAMMER_MREC_HEADSIZE
; n
< bytes
; n
+= i
) {
1354 i
= read(fd
, buf
+ count
+ n
, bytes
- n
);
1359 fprintf(stderr
, "read_mrecords: short read on pipe\n");
1363 bcopy(pickup
, buf
+ count
, HAMMER_MREC_HEADSIZE
);
1364 pickup
->signature
= 0;
1366 mrec
= (void *)(buf
+ count
);
1369 * Validate the completed record
1371 if (!hammer_crc_test_mrec_head(&mrec
->head
, mrec
->head
.rec_size
)) {
1372 fprintf(stderr
, "read_mrecords: malformed record "
1373 "on pipe, bad crc\n");
1378 * If its a B-Tree record validate the data crc.
1380 * NOTE: If the VFS passes us an explicitly errorde mrec
1381 * we just pass it through.
1383 type
= mrec
->head
.type
& HAMMER_MRECF_TYPE_MASK
;
1385 if (type
== HAMMER_MREC_TYPE_REC
) {
1386 if (mrec
->head
.rec_size
<
1387 sizeof(mrec
->rec
) + mrec
->rec
.leaf
.data_len
) {
1389 "read_mrecords: malformed record on "
1390 "pipe, illegal element data_len\n");
1393 if (mrec
->rec
.leaf
.data_len
&&
1394 mrec
->rec
.leaf
.data_offset
&&
1395 hammer_crc_test_leaf(&mrec
->rec
+ 1, &mrec
->rec
.leaf
) == 0) {
1397 "read_mrecords: data_crc did not "
1398 "match data! obj=%016jx key=%016jx\n",
1399 (uintmax_t)mrec
->rec
.leaf
.base
.obj_id
,
1400 (uintmax_t)mrec
->rec
.leaf
.base
.key
);
1402 "continuing, but there are problems\n");
1411 * Read and return a single mrecord.
1414 hammer_ioc_mrecord_any_t
1415 read_mrecord(int fdin
, int *errorp
, hammer_ioc_mrecord_head_t pickup
)
1417 hammer_ioc_mrecord_any_t mrec
;
1418 struct hammer_ioc_mrecord_head mrechd
;
1423 if (pickup
&& pickup
->type
!= 0) {
1425 pickup
->signature
= 0;
1427 n
= HAMMER_MREC_HEADSIZE
;
1430 * Read in the PFSD header from the sender.
1432 for (n
= 0; n
< HAMMER_MREC_HEADSIZE
; n
+= i
) {
1433 i
= read(fdin
, (char *)&mrechd
+ n
, HAMMER_MREC_HEADSIZE
- n
);
1438 *errorp
= 0; /* EOF */
1441 if (n
!= HAMMER_MREC_HEADSIZE
) {
1442 fprintf(stderr
, "short read of mrecord header\n");
1447 if (mrechd
.signature
!= HAMMER_IOC_MIRROR_SIGNATURE
) {
1448 fprintf(stderr
, "read_mrecord: bad signature\n");
1452 bytes
= HAMMER_HEAD_DOALIGN(mrechd
.rec_size
);
1453 assert(bytes
>= sizeof(mrechd
));
1454 mrec
= malloc(bytes
);
1455 mrec
->head
= mrechd
;
1458 i
= read(fdin
, (char *)mrec
+ n
, bytes
- n
);
1464 fprintf(stderr
, "read_mrecord: short read on payload\n");
1468 if (!hammer_crc_test_mrec_head(&mrec
->head
, mrec
->head
.rec_size
)) {
1469 fprintf(stderr
, "read_mrecord: bad CRC\n");
1479 write_mrecord(int fdout
, uint32_t type
, hammer_ioc_mrecord_any_t mrec
,
1482 char zbuf
[HAMMER_HEAD_ALIGN
];
1485 pad
= HAMMER_HEAD_DOALIGN(bytes
) - bytes
;
1487 assert(bytes
>= (int)sizeof(mrec
->head
));
1488 bzero(&mrec
->head
, sizeof(mrec
->head
));
1489 mrec
->head
.signature
= HAMMER_IOC_MIRROR_SIGNATURE
;
1490 mrec
->head
.type
= type
;
1491 mrec
->head
.rec_size
= bytes
;
1492 hammer_crc_set_mrec_head(&mrec
->head
, bytes
);
1493 if (write(fdout
, mrec
, bytes
) != bytes
) {
1494 fprintf(stderr
, "write_mrecord: error %d (%s)\n",
1495 errno
, strerror(errno
));
1500 if (write(fdout
, zbuf
, pad
) != pad
) {
1501 fprintf(stderr
, "write_mrecord: error %d (%s)\n",
1502 errno
, strerror(errno
));
1509 * Generate a mirroring header with the pfs information of the
1510 * originating filesytem.
1513 generate_mrec_header(int fd
, int pfs_id
,
1514 union hammer_ioc_mrecord_any
*mrec_tmp
)
1516 struct hammer_ioc_pseudofs_rw pfs
;
1518 bzero(mrec_tmp
, sizeof(*mrec_tmp
));
1519 clrpfs(&pfs
, &mrec_tmp
->pfs
.pfsd
, pfs_id
);
1521 if (ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, &pfs
) != 0) {
1522 fprintf(stderr
, "Mirror-read: not a HAMMER fs/pseudofs!\n");
1525 if (pfs
.version
!= HAMMER_IOC_PSEUDOFS_VERSION
) {
1526 fprintf(stderr
, "Mirror-read: HAMMER PFS version mismatch!\n");
1529 mrec_tmp
->pfs
.version
= pfs
.version
;
1533 * Validate the pfs information from the originating filesystem
1534 * against the target filesystem. shared_uuid must match.
1536 * return -1 if we got a TERM record
1539 validate_mrec_header(int fd
, int fdin
, int is_target
, int pfs_id
,
1540 struct hammer_ioc_mrecord_head
*pickup
,
1541 hammer_tid_t
*tid_begp
, hammer_tid_t
*tid_endp
)
1543 struct hammer_ioc_pseudofs_rw pfs
;
1544 struct hammer_pseudofs_data pfsd
;
1545 hammer_ioc_mrecord_any_t mrec
;
1549 * Get the PFSD info from the target filesystem.
1551 clrpfs(&pfs
, &pfsd
, pfs_id
);
1552 if (ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, &pfs
) != 0) {
1553 fprintf(stderr
, "mirror-write: not a HAMMER fs/pseudofs!\n");
1556 if (pfs
.version
!= HAMMER_IOC_PSEUDOFS_VERSION
) {
1557 fprintf(stderr
, "mirror-write: HAMMER PFS version mismatch!\n");
1561 mrec
= read_mrecord(fdin
, &error
, pickup
);
1564 fprintf(stderr
, "validate_mrec_header: short read\n");
1567 if (mrec
->head
.type
== HAMMER_MREC_TYPE_TERM
) {
1572 if (mrec
->head
.type
!= HAMMER_MREC_TYPE_PFSD
) {
1573 fprintf(stderr
, "validate_mrec_header: did not get expected "
1574 "PFSD record type\n");
1577 if (mrec
->head
.rec_size
!= sizeof(mrec
->pfs
)) {
1578 fprintf(stderr
, "validate_mrec_header: unexpected payload "
1582 if (mrec
->pfs
.version
!= pfs
.version
) {
1583 fprintf(stderr
, "validate_mrec_header: Version mismatch\n");
1588 * Whew. Ok, is the read PFS info compatible with the target?
1590 if (bcmp(&mrec
->pfs
.pfsd
.shared_uuid
, &pfsd
.shared_uuid
,
1591 sizeof(pfsd
.shared_uuid
)) != 0) {
1593 "mirror-write: source and target have "
1594 "different shared-uuid's!\n");
1597 if (is_target
&& hammer_is_pfs_master(&pfsd
)) {
1598 fprintf(stderr
, "mirror-write: target must be in slave mode\n");
1602 *tid_begp
= mrec
->pfs
.pfsd
.sync_beg_tid
;
1604 *tid_endp
= mrec
->pfs
.pfsd
.sync_end_tid
;
1610 update_pfs_snapshot(int fd
, hammer_tid_t snapshot_tid
, int pfs_id
)
1612 struct hammer_ioc_pseudofs_rw pfs
;
1613 struct hammer_pseudofs_data pfsd
;
1615 clrpfs(&pfs
, &pfsd
, pfs_id
);
1616 if (ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, &pfs
) != 0) {
1617 perror("update_pfs_snapshot (read)");
1620 if (pfsd
.sync_end_tid
!= snapshot_tid
) {
1621 pfsd
.sync_end_tid
= snapshot_tid
;
1622 if (ioctl(fd
, HAMMERIOC_SET_PSEUDOFS
, &pfs
) != 0) {
1623 perror("update_pfs_snapshot (rewrite)");
1626 if (VerboseOpt
>= 2) {
1628 "Mirror-write: Completed, updated snapshot "
1630 (uintmax_t)snapshot_tid
);
1637 * Bandwidth-limited write in chunks
1641 writebw(int fd
, const void *buf
, size_t nbytes
,
1642 uint64_t *bwcount
, struct timeval
*tv1
)
1653 if (*bwcount
+ nbytes
> BandwidthOpt
)
1654 n
= BandwidthOpt
- *bwcount
;
1658 r
= write(fd
, buf
, n
);
1662 buf
= (const char *)buf
+ r
;
1667 if (*bwcount
>= BandwidthOpt
) {
1668 gettimeofday(&tv2
, NULL
);
1669 usec
= (int)(tv2
.tv_sec
- tv1
->tv_sec
) * 1000000 +
1670 (int)(tv2
.tv_usec
- tv1
->tv_usec
);
1671 if (usec
>= 0 && usec
< 1000000)
1672 usleep(1000000 - usec
);
1673 gettimeofday(tv1
, NULL
);
1674 *bwcount
-= BandwidthOpt
;
1681 * Get a yes or no answer from the terminal. The program may be run as
1682 * part of a two-way pipe so we cannot use stdin for this operation.
1691 fp
= fopen("/dev/tty", "r");
1693 fprintf(stderr
, "No terminal for response\n");
1697 while (fgets(buf
, sizeof(buf
), fp
) != NULL
) {
1698 if (buf
[0] == 'y' || buf
[0] == 'Y') {
1702 if (buf
[0] == 'n' || buf
[0] == 'N') {
1706 fprintf(stderr
, "Response not understood\n");
1714 score_printf(size_t i
, size_t w
, const char *ctl
, ...)
1718 static size_t SSize
;
1719 static int SFd
= -1;
1720 static char ScoreBuf
[1024];
1722 if (ScoreBoardFile
== NULL
)
1724 assert(i
+ w
< sizeof(ScoreBuf
));
1726 SFd
= open(ScoreBoardFile
, O_RDWR
|O_CREAT
|O_TRUNC
, 0644);
1731 for (n
= 0; n
< i
; ++n
) {
1732 if (ScoreBuf
[n
] == 0)
1736 vsnprintf(ScoreBuf
+ i
, w
- 1, ctl
, va
);
1738 n
= strlen(ScoreBuf
+ i
);
1740 ScoreBuf
[i
+ n
] = ' ';
1743 ScoreBuf
[i
+ n
] = '\n';
1746 pwrite(SFd
, ScoreBuf
, SSize
, 0);
1750 hammer_check_restrict(const char *filesystem
)
1755 if (RestrictTarget
== NULL
)
1757 rlen
= strlen(RestrictTarget
);
1758 if (strncmp(filesystem
, RestrictTarget
, rlen
) != 0) {
1759 fprintf(stderr
, "hammer-remote: restricted target\n");
1763 while (filesystem
[rlen
]) {
1765 filesystem
[rlen
] == '.' &&
1766 filesystem
[rlen
+1] == '.') {
1767 fprintf(stderr
, "hammer-remote: '..' not allowed\n");
1770 if (filesystem
[rlen
] == '/')
1779 mirror_usage(int code
)
1782 "hammer mirror-read <filesystem> [begin-tid]\n"
1783 "hammer mirror-read-stream <filesystem> [begin-tid]\n"
1784 "hammer mirror-write <filesystem>\n"
1785 "hammer mirror-dump [header]\n"
1786 "hammer mirror-copy [[user@]host:]<filesystem>"
1787 " [[user@]host:]<filesystem>\n"
1788 "hammer mirror-stream [[user@]host:]<filesystem>"
1789 " [[user@]host:]<filesystem>\n"