-
Notifications
You must be signed in to change notification settings - Fork 117
/
cmd_cleanup.c
1312 lines (1215 loc) · 31.3 KB
/
cmd_cleanup.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Copyright (c) 2008 The DragonFly Project. All rights reserved.
*
* This code is derived from software contributed to The DragonFly Project
* by Matthew Dillon <dillon@backplane.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of The DragonFly Project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific, prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Clean up specific HAMMER filesystems or all HAMMER filesystems.
*
* If no filesystems are specified any HAMMER- or null-mounted hammer PFS's
* are cleaned.
*
* Each HAMMER filesystem may contain a configuration file. If no
* configuration file is present one will be created with the following
* defaults:
*
* snapshots 1d 60d (0d 0d for /tmp, /var/tmp, /usr/obj)
* prune 1d 5m
* rebalance 1d 5m
* #dedup 1d 5m (not enabled by default)
* reblock 1d 5m
* recopy 30d 10m
*
* All hammer commands create and maintain cycle files in the snapshots
* directory.
*
* For HAMMER version 2- the configuration file is a named 'config' in
* the snapshots directory, which defaults to <pfs>/snapshots.
* For HAMMER version 3+ the configuration file is saved in filesystem
* meta-data. The snapshots directory defaults to /var/hammer/<pfs>
* (/var/hammer/root for root mount).
*/
#include "hammer.h"
#include <libutil.h>
struct didpfs {
struct didpfs *next;
hammer_uuid_t uuid;
};
static void do_cleanup(const char *path);
static void config_init(const char *path, struct hammer_ioc_config *config);
static void migrate_config(FILE *fp, struct hammer_ioc_config *config);
static void migrate_snapshots(int fd, const char *snapshots_path);
static void migrate_one_snapshot(int fd, const char *fpath,
struct hammer_ioc_snapshot *snapshot);
static int strtosecs(char *ptr);
static const char *dividing_slash(const char *path);
static int check_period(const char *snapshots_path, const char *cmd, int arg1,
time_t *savep);
static void save_period(const char *snapshots_path, const char *cmd,
time_t savet);
static int check_softlinks(int fd, int new_config, const char *snapshots_path);
static void cleanup_softlinks(int fd, int new_config,
const char *snapshots_path, int arg2, char *arg3);
static void delete_snapshots(int fd, struct hammer_ioc_snapshot *dsnapshot);
static int check_expired(const char *fpath, int arg2);
static int create_snapshot(const char *path, const char *snapshots_path);
static int cleanup_rebalance(const char *path, const char *snapshots_path,
int arg1, int arg2);
static int cleanup_prune(const char *path, const char *snapshots_path,
int arg1, int arg2, int snapshots_disabled);
static int cleanup_reblock(const char *path, const char *snapshots_path,
int arg1, int arg2);
static int cleanup_recopy(const char *path, const char *snapshots_path,
int arg1, int arg2);
static int cleanup_dedup(const char *path, const char *snapshots_path,
int arg1, int arg2);
static void runcmd(int *resp, const char *ctl, ...) __printflike(2, 3);
#define WS " \t\r\n"
static struct didpfs *FirstPFS;
void
hammer_cmd_cleanup(char **av, int ac)
{
char *fstype, *fs, *path;
struct statfs *stfsbuf;
int mntsize, i;
tzset();
if (ac == 0) {
mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
if (mntsize > 0) {
for (i=0; i < mntsize; i++) {
/*
* We will cleanup in the case fstype is hammer.
* If we have null-mounted PFS, we check the
* mount source. If it looks like a PFS, we
* proceed to cleanup also.
*/
fstype = stfsbuf[i].f_fstypename;
fs = stfsbuf[i].f_mntfromname;
if ((strcmp(fstype, "hammer") == 0) ||
((strcmp(fstype, "null") == 0) &&
(strstr(fs, "/@@0x") != NULL ||
strstr(fs, "/@@-1") != NULL))) {
path = stfsbuf[i].f_mntonname;
do_cleanup(path);
}
}
}
} else {
while (ac) {
do_cleanup(*av);
--ac;
++av;
}
}
}
static
void
do_cleanup(const char *path)
{
struct hammer_ioc_pseudofs_rw pfs;
struct hammer_ioc_config config;
struct hammer_ioc_version version;
union hammer_ioc_mrecord_any mrec_tmp;
char *snapshots_path = NULL;
char *config_path;
struct stat st;
char *cmd;
char *ptr;
int arg1;
int arg2;
char *arg3;
time_t savet;
char buf[256];
char *cbase;
char *cptr;
FILE *fp = NULL;
struct didpfs *didpfs;
int snapshots_disabled = 0;
int prune_warning = 0;
int new_config = 0;
int snapshots_from_pfs = 0;
int fd;
int r;
int found_rebal = 0;
bzero(&mrec_tmp, sizeof(mrec_tmp));
clrpfs(&pfs, &mrec_tmp.pfs.pfsd, -1);
printf("cleanup %-20s -", path);
fd = open(path, O_RDONLY);
if (fd < 0) {
printf(" unable to access directory: %s\n", strerror(errno));
return;
}
if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
printf(" not a HAMMER filesystem: %s\n", strerror(errno));
close(fd);
return;
}
if (pfs.version != HAMMER_IOC_PSEUDOFS_VERSION) {
printf(" unrecognized HAMMER version\n");
close(fd);
return;
}
bzero(&version, sizeof(version));
if (ioctl(fd, HAMMERIOC_GET_VERSION, &version) < 0) {
printf(" HAMMER filesystem but couldn't retrieve version!\n");
close(fd);
return;
}
HammerVersion = version.cur_version;
bzero(&config, sizeof(config));
if (version.cur_version >= 3) {
if (ioctl(fd, HAMMERIOC_GET_CONFIG, &config) == 0 &&
config.head.error == 0) {
new_config = 1;
}
}
/*
* Make sure we have not already handled this PFS. Several nullfs
* mounts might alias the same PFS.
*/
for (didpfs = FirstPFS; didpfs; didpfs = didpfs->next) {
if (hammer_uuid_compare(&didpfs->uuid,
&mrec_tmp.pfs.pfsd.unique_uuid) == 0) {
printf(" PFS#%d already handled\n", pfs.pfs_id);
close(fd);
return;
}
}
didpfs = malloc(sizeof(*didpfs));
didpfs->next = FirstPFS;
FirstPFS = didpfs;
didpfs->uuid = mrec_tmp.pfs.pfsd.unique_uuid;
/*
* Calculate the old snapshots directory for HAMMER VERSION < 3
*
* If the directory is explicitly specified in the PFS config
* we flag it and will not migrate it later.
*/
if (mrec_tmp.pfs.pfsd.snapshots[0] == '/') {
asprintf(&snapshots_path, "%s", mrec_tmp.pfs.pfsd.snapshots);
snapshots_from_pfs = 1;
} else if (mrec_tmp.pfs.pfsd.snapshots[0]) {
printf(" WARNING: pfs-slave's snapshots dir is not absolute\n");
close(fd);
return;
} else if (hammer_is_pfs_slave(&mrec_tmp.pfs.pfsd)) {
if (version.cur_version < 3) {
printf(" WARNING: must configure snapshot dir for PFS slave\n");
printf("\tWe suggest <fs>/var/slaves/<name> where "
"<fs> is the base HAMMER fs\n");
printf("\tcontaining the slave\n");
close(fd);
return;
}
} else {
asprintf(&snapshots_path,
"%s%ssnapshots", path, dividing_slash(path));
}
/*
* Check for old-style config file
*/
if (snapshots_path) {
asprintf(&config_path, "%s/config", snapshots_path);
fp = fopen(config_path, "r");
}
/*
* Handle upgrades to hammer version 3, move the config
* file into meta-data.
*
* For the old config read the file into the config structure,
* we will parse it out of the config structure regardless.
*/
if (version.cur_version >= 3) {
if (fp) {
printf("(migrating) ");
fflush(stdout);
migrate_config(fp, &config);
migrate_snapshots(fd, snapshots_path);
fclose(fp);
if (ioctl(fd, HAMMERIOC_SET_CONFIG, &config) < 0) {
printf(" cannot init meta-data config!\n");
close(fd);
return;
}
remove(config_path);
} else if (new_config == 0) {
config_init(path, &config);
if (ioctl(fd, HAMMERIOC_SET_CONFIG, &config) < 0) {
printf(" cannot init meta-data config!\n");
close(fd);
return;
}
}
new_config = 1;
} else {
/*
* Create missing snapshots directory for HAMMER VERSION < 3
*/
if (stat(snapshots_path, &st) < 0) {
if (mkdir(snapshots_path, 0755) != 0) {
free(snapshots_path);
printf(" unable to create snapshot dir \"%s\": %s\n",
snapshots_path, strerror(errno));
close(fd);
return;
}
}
/*
* Create missing config file for HAMMER VERSION < 3
*/
if (fp == NULL) {
config_init(path, &config);
fp = fopen(config_path, "w");
if (fp) {
fwrite(config.config.text, 1,
strlen(config.config.text), fp);
fclose(fp);
}
} else {
migrate_config(fp, &config);
fclose(fp);
}
}
/*
* If snapshots_from_pfs is not set we calculate the new snapshots
* directory default (in /var) for HAMMER VERSION >= 3 and migrate
* the old snapshots directory over.
*
* People who have set an explicit snapshots directory will have
* to migrate the data manually into /var/hammer, or not bother at
* all. People running slaves may wish to migrate it and then
* clear the snapshots specification in the PFS config for the
* slave.
*/
if (new_config && snapshots_from_pfs == 0) {
char *npath;
if (path[0] != '/') {
printf(" path must start with '/'\n");
return;
}
if (strcmp(path, "/") == 0)
asprintf(&npath, "%s/root", SNAPSHOTS_BASE);
else
asprintf(&npath, "%s/%s", SNAPSHOTS_BASE, path + 1);
if (snapshots_path) {
if (stat(npath, &st) < 0 && errno == ENOENT) {
if (stat(snapshots_path, &st) < 0 && errno == ENOENT) {
printf(" HAMMER UPGRADE: Creating snapshots\n"
"\tCreating snapshots in %s\n",
npath);
runcmd(&r, "mkdir -p %s", npath);
} else {
printf(" HAMMER UPGRADE: Moving snapshots\n"
"\tMoving snapshots from %s to %s\n",
snapshots_path, npath);
runcmd(&r, "mkdir -p %s", npath);
runcmd(&r, "cpdup %s %s", snapshots_path, npath);
if (r != 0) {
printf("Unable to move snapshots directory!\n");
printf("Please fix this critical error.\n");
printf("Aborting cleanup of %s\n", path);
close(fd);
return;
}
runcmd(&r, "rm -rf %s", snapshots_path);
}
}
free(snapshots_path);
} else if (stat(npath, &st) < 0 && errno == ENOENT) {
runcmd(&r, "mkdir -p %s", npath);
}
snapshots_path = npath;
}
/*
* Lock the PFS. fd is the base directory of the mounted PFS.
*/
if (flock(fd, LOCK_EX|LOCK_NB) == -1) {
if (errno == EWOULDBLOCK)
printf(" PFS#%d locked by other process\n", pfs.pfs_id);
else
printf(" can not lock %s: %s\n", config_path, strerror(errno));
close(fd);
return;
}
printf(" handle PFS#%d using %s\n", pfs.pfs_id, snapshots_path);
struct pidfh *pfh = NULL;
static char pidfile[PIDFILE_BUFSIZE];
snprintf (pidfile, PIDFILE_BUFSIZE, "%s/hammer.cleanup.%d",
pidfile_loc, getpid());
pfh = pidfile_open(pidfile, 0644, NULL);
if (pfh == NULL)
warn ("Unable to open or create %s", pidfile);
pidfile_write(pfh);
/*
* Process the config file
*/
cbase = config.config.text;
while ((cptr = strchr(cbase, '\n')) != NULL) {
bcopy(cbase, buf, cptr - cbase);
buf[cptr - cbase] = 0;
cbase = cptr + 1;
cmd = strtok(buf, WS);
if (cmd == NULL || cmd[0] == '#')
continue;
arg1 = 0;
arg2 = 0;
arg3 = NULL;
if ((ptr = strtok(NULL, WS)) != NULL) {
arg1 = strtosecs(ptr);
if ((ptr = strtok(NULL, WS)) != NULL) {
arg2 = strtosecs(ptr);
arg3 = strtok(NULL, WS);
}
}
printf("%20s - ", cmd);
fflush(stdout);
r = 1;
if (strcmp(cmd, "snapshots") == 0) {
if (arg1 == 0) {
if (arg2 &&
check_softlinks(fd, new_config,
snapshots_path)) {
printf("only removing old snapshots\n");
prune_warning = 1;
cleanup_softlinks(fd, new_config,
snapshots_path,
arg2, arg3);
} else {
printf("disabled\n");
snapshots_disabled = 1;
}
} else
if (check_period(snapshots_path, cmd, arg1, &savet)) {
printf("run\n");
cleanup_softlinks(fd, new_config,
snapshots_path,
arg2, arg3);
r = create_snapshot(path, snapshots_path);
} else {
printf("skip\n");
}
} else if (arg1 == 0) {
/*
* The commands following this check can't handle
* a period of 0, so call the feature disabled and
* ignore the directive.
*/
printf("disabled\n");
} else if (strcmp(cmd, "prune") == 0) {
if (check_period(snapshots_path, cmd, arg1, &savet)) {
if (prune_warning) {
printf("run - WARNING snapshot "
"softlinks present "
"but snapshots disabled\n");
} else {
printf("run\n");
}
r = cleanup_prune(path, snapshots_path,
arg1, arg2, snapshots_disabled);
} else {
printf("skip\n");
}
} else if (strcmp(cmd, "rebalance") == 0) {
found_rebal = 1;
if (check_period(snapshots_path, cmd, arg1, &savet)) {
printf("run");
fflush(stdout);
if (VerboseOpt)
printf("\n");
r = cleanup_rebalance(path, snapshots_path,
arg1, arg2);
} else {
printf("skip\n");
}
} else if (strcmp(cmd, "reblock") == 0) {
if (check_period(snapshots_path, cmd, arg1, &savet)) {
printf("run");
fflush(stdout);
if (VerboseOpt)
printf("\n");
r = cleanup_reblock(path, snapshots_path,
arg1, arg2);
} else {
printf("skip\n");
}
} else if (strcmp(cmd, "recopy") == 0) {
if (check_period(snapshots_path, cmd, arg1, &savet)) {
printf("run");
fflush(stdout);
if (VerboseOpt)
printf("\n");
r = cleanup_recopy(path, snapshots_path,
arg1, arg2);
} else {
printf("skip\n");
}
} else if (strcmp(cmd, "dedup") == 0) {
if (check_period(snapshots_path, cmd, arg1, &savet)) {
printf("run");
fflush(stdout);
if (VerboseOpt)
printf("\n");
r = cleanup_dedup(path, snapshots_path,
arg1, arg2);
} else {
printf("skip\n");
}
} else {
printf("unknown directive\n");
r = 1;
}
if (r == 0)
save_period(snapshots_path, cmd, savet);
}
/*
* Add new rebalance feature if the config doesn't have it.
* (old style config only).
*/
if (new_config == 0 && found_rebal == 0) {
if ((fp = fopen(config_path, "r+")) != NULL) {
fseek(fp, 0L, 2);
fprintf(fp, "rebalance 1d 5m\n");
fclose(fp);
}
}
/*
* Cleanup, and delay a little
*
* NOTE: pidfile_remove() closes, removes, and frees the pfh.
* pidfile_close() closes and frees.
*/
close(fd);
usleep(1000);
pidfile_remove(pfh);
}
/*
* Initialize new config data (new or old style)
*/
static
void
config_init(const char *path, struct hammer_ioc_config *config)
{
const char *snapshots;
if (strcmp(path, "/tmp") == 0 ||
strcmp(path, "/var/tmp") == 0 ||
strcmp(path, "/usr/obj") == 0) {
snapshots = "snapshots 0d 0d\n";
} else {
snapshots = "snapshots 1d 60d\n";
}
bzero(config->config.text, sizeof(config->config.text));
snprintf(config->config.text, sizeof(config->config.text) - 1, "%s%s",
snapshots,
"prune 1d 5m\n"
"rebalance 1d 5m\n"
"#dedup 1d 5m\n"
"reblock 1d 5m\n"
"recopy 30d 10m\n");
}
/*
* Migrate configuration data from the old snapshots/config
* file to the new meta-data format.
*/
static
void
migrate_config(FILE *fp, struct hammer_ioc_config *config)
{
int n;
n = fread(config->config.text, 1, sizeof(config->config.text) - 1, fp);
if (n >= 0)
bzero(config->config.text + n, sizeof(config->config.text) - n);
}
/*
* Migrate snapshot softlinks in the snapshots directory to the
* new meta-data format. The softlinks are left intact, but
* this way the pruning code won't lose track of them if you
* happen to blow away the snapshots directory.
*/
static
void
migrate_snapshots(int fd, const char *snapshots_path)
{
struct hammer_ioc_snapshot snapshot;
struct dirent *den;
struct stat st;
DIR *dir;
char *fpath;
bzero(&snapshot, sizeof(snapshot));
if ((dir = opendir(snapshots_path)) != NULL) {
while ((den = readdir(dir)) != NULL) {
if (den->d_name[0] == '.')
continue;
asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
migrate_one_snapshot(fd, fpath, &snapshot);
free(fpath);
}
closedir(dir);
}
migrate_one_snapshot(fd, NULL, &snapshot);
}
/*
* Migrate a single snapshot. If fpath is NULL the ioctl is flushed,
* otherwise it is flushed when it fills up.
*/
static
void
migrate_one_snapshot(int fd, const char *fpath,
struct hammer_ioc_snapshot *snapshot)
{
if (fpath) {
hammer_snapshot_data_t snap;
struct tm tm;
time_t t;
int year;
int month;
int day = 0;
int hour = 0;
int minute = 0;
int r;
char linkbuf[1024];
const char *ptr;
hammer_tid_t tid;
t = (time_t)-1;
tid = (hammer_tid_t)(int64_t)-1;
/* fpath may contain directory components */
if ((ptr = strrchr(fpath, '/')) != NULL)
++ptr;
else
ptr = fpath;
while (*ptr && *ptr != '-' && *ptr != '.')
++ptr;
if (*ptr)
++ptr;
r = sscanf(ptr, "%4d%2d%2d-%2d%2d",
&year, &month, &day, &hour, &minute);
if (r >= 3) {
bzero(&tm, sizeof(tm));
tm.tm_isdst = -1;
tm.tm_min = minute;
tm.tm_hour = hour;
tm.tm_mday = day;
tm.tm_mon = month - 1;
tm.tm_year = year - 1900;
t = mktime(&tm);
}
bzero(linkbuf, sizeof(linkbuf));
if (readlink(fpath, linkbuf, sizeof(linkbuf) - 1) > 0 &&
(ptr = strrchr(linkbuf, '@')) != NULL &&
ptr > linkbuf && ptr[-1] == '@') {
tid = strtoull(ptr + 1, NULL, 16);
}
if (t != (time_t)-1 && tid != (hammer_tid_t)(int64_t)-1) {
snap = &snapshot->snaps[snapshot->count];
bzero(snap, sizeof(*snap));
snap->tid = tid;
snap->ts = (uint64_t)t * 1000000ULL;
snprintf(snap->label, sizeof(snap->label),
"migrated");
++snapshot->count;
} else {
printf(" non-canonical snapshot softlink: %s->%s\n",
fpath, linkbuf);
}
}
if ((fpath == NULL && snapshot->count) ||
snapshot->count == HAMMER_SNAPS_PER_IOCTL) {
printf(" (%d snapshots)", snapshot->count);
again:
if (ioctl(fd, HAMMERIOC_ADD_SNAPSHOT, snapshot) < 0) {
printf(" Ioctl to migrate snapshots failed: %s\n",
strerror(errno));
} else if (snapshot->head.error == EALREADY) {
++snapshot->index;
goto again;
} else if (snapshot->head.error) {
printf(" Ioctl to migrate snapshots failed: %s\n",
strerror(snapshot->head.error));
}
printf("index %d\n", snapshot->index);
snapshot->index = 0;
snapshot->count = 0;
snapshot->head.error = 0;
}
}
static
int
strtosecs(char *ptr)
{
int val;
val = strtol(ptr, &ptr, 0);
switch(*ptr) {
case 'd':
val *= 24;
/* fall through */
case 'h':
val *= 60;
/* fall through */
case 'm':
val *= 60;
/* fall through */
case 's':
break;
default:
errx(1, "illegal suffix converting %s", ptr);
/* not reached */
break;
}
return(val);
}
static
const char *
dividing_slash(const char *path)
{
int len = strlen(path);
if (len && path[len-1] == '/')
return("");
else
return("/");
}
/*
* Check whether the desired period has elapsed since the last successful
* run. The run may take a while and cross a boundary so we remember the
* current time_t so we can save it later on.
*
* Periods in minutes, hours, or days are assumed to have been crossed
* if the local time crosses a minute, hour, or day boundary regardless
* of how close the last operation actually was.
*
* If ForceOpt is set always return true.
*/
static
int
check_period(const char *snapshots_path, const char *cmd, int arg1,
time_t *savep)
{
char *check_path;
struct tm tp1;
struct tm tp2;
FILE *fp;
time_t baset, lastt;
char buf[256];
time(savep);
localtime_r(savep, &tp1);
/*
* Force run if -F
*/
if (ForceOpt)
return(1);
/*
* Retrieve the start time of the last successful operation.
*/
asprintf(&check_path, "%s/.%s.period", snapshots_path, cmd);
fp = fopen(check_path, "r");
free(check_path);
if (fp == NULL)
return(1);
if (fgets(buf, sizeof(buf), fp) == NULL) {
fclose(fp);
return(1);
}
fclose(fp);
lastt = strtol(buf, NULL, 0);
localtime_r(&lastt, &tp2);
/*
* Normalize the times. e.g. if asked to do something on a 1-day
* interval the operation will be performed as soon as the day
* turns over relative to the previous operation, even if the previous
* operation ran a few seconds ago just before midnight.
*/
if (arg1 % 60 == 0) {
tp1.tm_sec = 0;
tp2.tm_sec = 0;
}
if (arg1 % (60 * 60) == 0) {
tp1.tm_min = 0;
tp2.tm_min = 0;
}
if (arg1 % (24 * 60 * 60) == 0) {
tp1.tm_hour = 0;
tp2.tm_hour = 0;
}
baset = mktime(&tp1);
lastt = mktime(&tp2);
#if 0
printf("%lld vs %lld\n", (long long)(baset - lastt), (long long)arg1);
#endif
if ((int)(baset - lastt) >= arg1)
return(1);
return(0);
}
/*
* Store the start time of the last successful operation.
*/
static
void
save_period(const char *snapshots_path, const char *cmd,
time_t savet)
{
char *ocheck_path;
char *ncheck_path;
FILE *fp;
asprintf(&ocheck_path, "%s/.%s.period", snapshots_path, cmd);
asprintf(&ncheck_path, "%s/.%s.period.new", snapshots_path, cmd);
fp = fopen(ncheck_path, "w");
if (fp) {
fprintf(fp, "0x%08llx\n", (long long)savet);
if (fclose(fp) == 0)
rename(ncheck_path, ocheck_path);
remove(ncheck_path);
} else {
fprintf(stderr, "hammer: Unable to create period-file %s: %s\n",
ncheck_path, strerror(errno));
}
}
/*
* Simply count the number of softlinks in the snapshots dir
*/
static
int
check_softlinks(int fd, int new_config, const char *snapshots_path)
{
struct dirent *den;
struct stat st;
DIR *dir;
char *fpath;
int res = 0;
/*
* Old-style softlink-based snapshots
*/
if ((dir = opendir(snapshots_path)) != NULL) {
while ((den = readdir(dir)) != NULL) {
if (den->d_name[0] == '.')
continue;
asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
++res;
free(fpath);
}
closedir(dir);
}
/*
* New-style snapshots are stored as filesystem meta-data,
* count those too.
*/
if (new_config) {
struct hammer_ioc_snapshot snapshot;
bzero(&snapshot, sizeof(snapshot));
do {
if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
err(2, "hammer cleanup: check_softlink "
"snapshot error");
/* not reached */
}
res += snapshot.count;
} while (snapshot.head.error == 0 && snapshot.count);
}
return (res);
}
/*
* Clean up expired softlinks in the snapshots dir
*/
static
void
cleanup_softlinks(int fd, int new_config,
const char *snapshots_path, int arg2, char *arg3)
{
struct dirent *den;
struct stat st;
DIR *dir;
char *fpath;
int anylink = 0;
if (arg3 != NULL && strstr(arg3, "any") != NULL)
anylink = 1;
if ((dir = opendir(snapshots_path)) != NULL) {
while ((den = readdir(dir)) != NULL) {
if (den->d_name[0] == '.')
continue;
asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode) &&
(anylink || strncmp(den->d_name, "snap-", 5) == 0)) {
if (check_expired(den->d_name, arg2)) {
if (VerboseOpt) {
printf(" expire %s\n",
fpath);
}
remove(fpath);
}
}
free(fpath);
}
closedir(dir);
}
/*
* New-style snapshots are stored as filesystem meta-data,
* count those too.
*/
if (new_config) {
struct hammer_ioc_snapshot snapshot;
struct hammer_ioc_snapshot dsnapshot;
hammer_snapshot_data_t snap;
struct tm *tp;
time_t t;
time_t dt;
char snapts[32];
uint32_t i;
bzero(&snapshot, sizeof(snapshot));
bzero(&dsnapshot, sizeof(dsnapshot));
do {
if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
err(2, "hammer cleanup: check_softlink "
"snapshot error");
/* not reached */
}
for (i = 0; i < snapshot.count; ++i) {
snap = &snapshot.snaps[i];
t = snap->ts / 1000000ULL;
dt = time(NULL) - t;
if ((int)dt > arg2 || snap->tid == 0) {
dsnapshot.snaps[dsnapshot.count++] =
*snap;
}
if ((int)dt > arg2 && VerboseOpt) {
tp = localtime(&t);
strftime(snapts, sizeof(snapts),
"%Y-%m-%d %H:%M:%S %Z", tp);
printf(" expire 0x%016jx %s %s\n",
(uintmax_t)snap->tid,
snapts,
snap->label);
}
if (dsnapshot.count == HAMMER_SNAPS_PER_IOCTL)
delete_snapshots(fd, &dsnapshot);
}
} while (snapshot.head.error == 0 && snapshot.count);
if (dsnapshot.count)
delete_snapshots(fd, &dsnapshot);
}
}
static
void
delete_snapshots(int fd, struct hammer_ioc_snapshot *dsnapshot)
{
for (;;) {
if (ioctl(fd, HAMMERIOC_DEL_SNAPSHOT, dsnapshot) < 0) {
printf(" Ioctl to delete snapshots failed: %s\n",
strerror(errno));
break;
}
if (dsnapshot->head.error) {
printf(" Ioctl to delete snapshots failed at "
"snap=%016jx: %s\n",