Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 1 | /* |
| 2 | * undelete.c --- routines to try to help a user recover a deleted file. |
| 3 | * |
| 4 | * Copyright (C) 1994 Theodore Ts'o. This file may be redistributed |
| 5 | * under the terms of the GNU Public License. |
| 6 | */ |
| 7 | |
| 8 | #include <stdio.h> |
| 9 | #include <unistd.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <ctype.h> |
| 12 | #include <string.h> |
| 13 | #include <time.h> |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 14 | #ifdef HAVE_ERRNO_H |
| 15 | #include <errno.h> |
| 16 | #endif |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 17 | #include <sys/types.h> |
| 18 | #include <sys/stat.h> |
| 19 | |
| 20 | #include "debugfs.h" |
| 21 | |
| 22 | struct deleted_info { |
| 23 | ino_t ino; |
| 24 | unsigned short mode; |
| 25 | unsigned short uid; |
Theodore Ts'o | 36a43d6 | 1998-03-24 16:17:51 +0000 | [diff] [blame] | 26 | __u64 size; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 27 | time_t dtime; |
| 28 | int num_blocks; |
| 29 | int free_blocks; |
| 30 | }; |
| 31 | |
| 32 | struct lsdel_struct { |
| 33 | ino_t inode; |
| 34 | int num_blocks; |
| 35 | int free_blocks; |
| 36 | int bad_blocks; |
| 37 | }; |
| 38 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 39 | static int deleted_info_compare(const void *a, const void *b) |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 40 | { |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 41 | const struct deleted_info *arg1, *arg2; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 42 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 43 | arg1 = (const struct deleted_info *) a; |
| 44 | arg2 = (const struct deleted_info *) b; |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 45 | |
| 46 | return arg1->dtime - arg2->dtime; |
| 47 | } |
| 48 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 49 | static int lsdel_proc(ext2_filsys fs, |
| 50 | blk_t *block_nr, |
| 51 | int blockcnt, |
| 52 | void *private) |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 53 | { |
| 54 | struct lsdel_struct *lsd = (struct lsdel_struct *) private; |
| 55 | |
| 56 | lsd->num_blocks++; |
| 57 | |
| 58 | if (*block_nr < fs->super->s_first_data_block || |
| 59 | *block_nr >= fs->super->s_blocks_count) { |
| 60 | lsd->bad_blocks++; |
| 61 | return BLOCK_ABORT; |
| 62 | } |
| 63 | |
| 64 | if (!ext2fs_test_block_bitmap(fs->block_map,*block_nr)) |
| 65 | lsd->free_blocks++; |
| 66 | |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | void do_lsdel(int argc, char **argv) |
| 71 | { |
| 72 | struct lsdel_struct lsd; |
| 73 | struct deleted_info *delarray; |
| 74 | int num_delarray, max_delarray; |
| 75 | ext2_inode_scan scan = 0; |
| 76 | ino_t ino; |
| 77 | struct ext2_inode inode; |
| 78 | errcode_t retval; |
| 79 | char *block_buf; |
| 80 | int i; |
| 81 | |
| 82 | if (argc > 1) { |
| 83 | com_err(argv[0], 0, "Usage: ls_deleted_inodes\n"); |
| 84 | return; |
| 85 | } |
| 86 | if (check_fs_open(argv[0])) |
| 87 | return; |
| 88 | |
| 89 | max_delarray = 100; |
| 90 | num_delarray = 0; |
| 91 | delarray = malloc(max_delarray * sizeof(struct deleted_info)); |
| 92 | if (!delarray) { |
| 93 | com_err("ls_deleted_inodes", ENOMEM, |
| 94 | "while allocating deleted information storage"); |
| 95 | exit(1); |
| 96 | } |
| 97 | |
Theodore Ts'o | fc6d9d5 | 1997-04-29 14:51:31 +0000 | [diff] [blame] | 98 | block_buf = malloc(current_fs->blocksize * 3); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 99 | if (!block_buf) { |
| 100 | com_err("ls_deleted_inodes", ENOMEM, "while allocating block buffer"); |
| 101 | goto error_out; |
| 102 | } |
| 103 | |
Theodore Ts'o | fc6d9d5 | 1997-04-29 14:51:31 +0000 | [diff] [blame] | 104 | retval = ext2fs_open_inode_scan(current_fs, 0, &scan); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 105 | if (retval) { |
| 106 | com_err("ls_deleted_inodes", retval, |
| 107 | "while opening inode scan"); |
| 108 | goto error_out; |
| 109 | } |
| 110 | |
| 111 | retval = ext2fs_get_next_inode(scan, &ino, &inode); |
| 112 | if (retval) { |
| 113 | com_err("ls_deleted_inodes", retval, |
| 114 | "while starting inode scan"); |
| 115 | goto error_out; |
| 116 | } |
| 117 | |
| 118 | while (ino) { |
| 119 | if (inode.i_dtime == 0) |
| 120 | goto next; |
| 121 | |
| 122 | lsd.inode = ino; |
| 123 | lsd.num_blocks = 0; |
| 124 | lsd.free_blocks = 0; |
| 125 | lsd.bad_blocks = 0; |
| 126 | |
Theodore Ts'o | fc6d9d5 | 1997-04-29 14:51:31 +0000 | [diff] [blame] | 127 | retval = ext2fs_block_iterate(current_fs, ino, 0, block_buf, |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 128 | lsdel_proc, &lsd); |
| 129 | if (retval) { |
| 130 | com_err("ls_deleted_inodes", retval, |
| 131 | "while calling ext2_block_iterate"); |
| 132 | goto next; |
| 133 | } |
| 134 | if (lsd.free_blocks && !lsd.bad_blocks) { |
| 135 | if (num_delarray >= max_delarray) { |
| 136 | max_delarray += 50; |
| 137 | delarray = realloc(delarray, |
| 138 | max_delarray * sizeof(struct deleted_info)); |
| 139 | if (!delarray) { |
| 140 | com_err("ls_deleted_inodes", |
| 141 | ENOMEM, |
| 142 | "while reallocating array"); |
| 143 | exit(1); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | delarray[num_delarray].ino = ino; |
| 148 | delarray[num_delarray].mode = inode.i_mode; |
| 149 | delarray[num_delarray].uid = inode.i_uid; |
| 150 | delarray[num_delarray].size = inode.i_size; |
Theodore Ts'o | 36a43d6 | 1998-03-24 16:17:51 +0000 | [diff] [blame] | 151 | if (!LINUX_S_ISDIR(inode.i_mode)) |
| 152 | delarray[num_delarray].size |= |
| 153 | ((__u64) inode.i_size_high << 32); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 154 | delarray[num_delarray].dtime = inode.i_dtime; |
| 155 | delarray[num_delarray].num_blocks = lsd.num_blocks; |
| 156 | delarray[num_delarray].free_blocks = lsd.free_blocks; |
| 157 | num_delarray++; |
| 158 | } |
| 159 | |
| 160 | next: |
| 161 | retval = ext2fs_get_next_inode(scan, &ino, &inode); |
| 162 | if (retval) { |
| 163 | com_err("ls_deleted_inodes", retval, |
| 164 | "while doing inode scan"); |
| 165 | goto error_out; |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | printf("%d deleted inodes found.\n", num_delarray); |
| 170 | printf(" Inode Owner Mode Size Blocks Time deleted\n"); |
| 171 | |
| 172 | qsort(delarray, num_delarray, sizeof(struct deleted_info), |
| 173 | deleted_info_compare); |
| 174 | |
| 175 | for (i = 0; i < num_delarray; i++) { |
Theodore Ts'o | 36a43d6 | 1998-03-24 16:17:51 +0000 | [diff] [blame] | 176 | printf("%6lu %6d %6o %6llu %4d/%4d %s", delarray[i].ino, |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 177 | delarray[i].uid, delarray[i].mode, delarray[i].size, |
| 178 | delarray[i].free_blocks, delarray[i].num_blocks, |
Theodore Ts'o | 21c84b7 | 1997-04-29 16:15:03 +0000 | [diff] [blame] | 179 | time_to_string(delarray[i].dtime)); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | error_out: |
| 183 | free(block_buf); |
| 184 | free(delarray); |
| 185 | if (scan) |
| 186 | ext2fs_close_inode_scan(scan); |
| 187 | return; |
| 188 | } |
| 189 | |
| 190 | |
| 191 | |