1 /*- 2 * Copyright (c) 2005 Mark Santcroos <marks@freebsd.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 * 24 * $FreeBSD$ 25 * 26 */ 27 28 #include <sys/param.h> 29 #include <sys/mount.h> 30 31 #include <ufs/ufs/dinode.h> 32 #include <ufs/ffs/fs.h> 33 34 #include <errno.h> 35 #include <ftw.h> 36 #include <libufs.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <unistd.h> 41 42 void find_inum(char *path); 43 void usage(void); 44 int compare_function(const char *, const struct stat *, int, struct FTW *); 45 int find_snapshot(struct statfs *sfs); 46 47 int verbose; 48 int cont_search; 49 uint32_t inode; 50 51 int 52 main(int argc, char **argv) 53 { 54 char *path; 55 struct stat st; 56 struct statfs *mntbuf; 57 int all = 0, ch, done = 0, fscount, n; 58 59 while ((ch = getopt(argc, argv, "adv")) != -1) { 60 switch (ch) { 61 case 'a': 62 all++; 63 break; 64 case 'd': 65 /* continue to search when matching inode is found 66 * this feature is not documented */ 67 cont_search++; 68 break; 69 case 'v': 70 verbose++; 71 break; 72 default: 73 usage(); 74 } 75 } 76 77 argc -= optind; 78 argv += optind; 79 80 if ((all == 0 && argc != 1) || (all == 1 && argc > 0)) 81 usage(); 82 83 if (!all) { 84 char resolved[PATH_MAX]; 85 86 path = *argv; 87 /* 88 * mount(8) use realpath(3) before mounting file system, 89 * so let's do the same with the given path. 90 */ 91 if (realpath(path, resolved) == NULL || /* can create full path */ 92 stat(resolved, &st) == -1 || /* is it stat'able */ 93 !S_ISDIR(st.st_mode)) { /* is it a directory */ 94 usage(); 95 } 96 path = resolved; 97 } 98 99 fscount = getmntinfo(&mntbuf, MNT_WAIT); 100 for (n = 0; n < fscount; n++) { 101 if (!strncmp(mntbuf[n].f_fstypename, "ufs", 3)) { 102 if (all || strcmp(path, mntbuf[n].f_mntonname) == 0) { 103 find_snapshot(&mntbuf[n]); 104 done++; 105 } 106 } 107 } 108 109 if (done == 0) 110 usage(); 111 112 return (0); 113 } 114 115 int 116 find_snapshot(struct statfs *sfs) 117 { 118 struct uufsd disk; 119 int j, snapcount = 0; 120 121 if (ufs_disk_fillout(&disk, sfs->f_mntfromname) == -1) 122 perror("ufs_disk_fillout"); 123 124 if (verbose) 125 printf("%s mounted on %s\n", disk.d_name, disk.d_fs.fs_fsmnt); 126 127 for (j = 0; j < FSMAXSNAP; j++) { 128 if (disk.d_fs.fs_snapinum[j]) { 129 inode = disk.d_fs.fs_snapinum[j]; 130 find_inum(sfs->f_mntonname); 131 snapcount++; 132 } 133 } 134 135 if (!snapcount && verbose) 136 printf("\tno snapshots found\n"); 137 138 return 0; 139 } 140 141 int 142 compare_function(const char *path, const struct stat *st, int flags, 143 struct FTW * ftwv) 144 { 145 146 if (flags == FTW_F && st->st_ino == inode) { 147 if (verbose) 148 printf("\tsnapshot "); 149 printf("%s", path); 150 if (verbose) 151 printf(" (inode %d)", st->st_ino); 152 printf("\n"); 153 if (!cont_search) 154 return (EEXIST); 155 } 156 157 return (0); 158 } 159 160 void 161 find_inum(char *path) 162 { 163 int ret; 164 165 ret = nftw(path, compare_function, 1, FTW_PHYS|FTW_MOUNT); 166 if (ret != EEXIST && ret != 0) { 167 perror("ftw"); 168 exit(ret); 169 } 170 } 171 172 void 173 usage(void) 174 { 175 176 printf("usage: snapinfo [-v] -a\n"); 177 printf(" snapinfo [-v] mountpoint\n"); 178 exit(1); 179 } 180