1 /*
2 * Copyright (c) 2011-2013 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@dragonflybsd.org>
6 * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org>
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "hammer2.h"
37
38 /*
39 * The snapshot is named <PFSNAME>_<YYYYMMDD.HHMMSS.TRANSID> unless
40 * overridden by a label.
41 *
42 * When local non-cache media is involved the media is
43 * first synchronized and the snapshot is then based on
44 * the media.
45 *
46 * If the media is remote the snapshot is created on the remote
47 * end (if you have sufficient administrative rights) and a local
48 * ADMIN or CACHE PFS is created with a connection to the snapshot
49 * on the remote.
50 *
51 * If the client has snapshot rights to multiple remotes then TBD.
52 */
53
54 int
cmd_pfs_snapshot(const char * sel_path,const char * path,const char * label,uint32_t pfs_flags)55 cmd_pfs_snapshot(const char *sel_path, const char *path, const char *label,
56 uint32_t pfs_flags)
57 {
58 hammer2_ioc_pfs_t pfs;
59 int ecode = 0;
60 int fd;
61 char filename[NAME_MAX + 256];
62 time_t t;
63 struct tm *tp;
64
65 if (path == NULL) {
66 fd = hammer2_ioctl_handle(sel_path);
67 } else {
68 fd = open(path, O_RDONLY);
69 if (fd < 0)
70 fprintf(stderr, "Unable to open %s\n", path);
71 }
72 if (fd < 0)
73 return 1;
74
75 if (label == NULL) {
76 time(&t);
77 tp = localtime(&t);
78 bzero(&pfs, sizeof(pfs));
79 pfs.name_key = (hammer2_key_t)-1;
80 if (ioctl(fd, HAMMER2IOC_PFS_GET, &pfs) < 0) {
81 perror("ioctl");
82 return 1;
83 }
84 snprintf(filename, sizeof(filename),
85 "%s.%04d%02d%02d.%02d%02d%02d",
86 pfs.name,
87 tp->tm_year + 1900,
88 tp->tm_mon + 1,
89 tp->tm_mday,
90 tp->tm_hour,
91 tp->tm_min,
92 tp->tm_sec);
93 label = filename;
94 }
95
96 bzero(&pfs, sizeof(pfs));
97 strlcpy(pfs.name, label, sizeof(pfs.name));
98 pfs.pfs_flags = pfs_flags;
99
100 if (ioctl(fd, HAMMER2IOC_PFS_SNAPSHOT, &pfs) < 0) {
101 perror("ioctl");
102 ecode = 1;
103 } else {
104 printf("created snapshot %s\n", label);
105 }
106 return ecode;
107 }
108