debugfs/icheck.c

   1 /*
   2  * icheck.c --- given a list of blocks, generate a list of inodes
   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 "config.h"
   9 #include <stdio.h>
  10 #include <unistd.h>
  11 #include <stdlib.h>
  12 #include <ctype.h>
  13 #include <string.h>
  14 #include <time.h>
  15 #ifdef HAVE_ERRNO_H
  16 #include <errno.h>
  17 #endif
  18 #include <sys/types.h>
  19
  20 #include "debugfs.h"
  21
  22 struct block_info {
  23         blk64_t         blk;
  24         ext2_ino_t      ino;
  25 };
  26
  27 struct block_walk_struct {
  28         struct block_info       *barray;
  29         e2_blkcnt_t             blocks_left;
  30         e2_blkcnt_t             num_blocks;
  31         ext2_ino_t              inode;
  32 };
  33
  34 static int icheck_proc(ext2_filsys fs EXT2FS_ATTR((unused)),
  35                        blk64_t  *block_nr,
  36                        e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
  37                        blk64_t ref_block EXT2FS_ATTR((unused)),
  38                        int ref_offset EXT2FS_ATTR((unused)),
  39                        void *private)
  40 {
  41         struct block_walk_struct *bw = (struct block_walk_struct *) private;
  42         e2_blkcnt_t     i;
  43
  44         for (i=0; i < bw->num_blocks; i++) {
  45                 if (!bw->barray[i].ino && bw->barray[i].blk == *block_nr) {
  46                         bw->barray[i].ino = bw->inode;
  47                         bw->blocks_left--;
  48                 }
  49         }
  50         if (!bw->blocks_left)
  51                 return BLOCK_ABORT;
  52
  53         return 0;
  54 }
  55
  56 void do_icheck(int argc, char **argv)
  57 {
  58         struct block_walk_struct bw;
  59         struct block_info       *binfo;
  60         int                     i;
  61         ext2_inode_scan         scan = 0;
  62         ext2_ino_t              ino;
  63         struct ext2_inode       inode;
  64         errcode_t               retval;
  65         char                    *block_buf;
  66
  67         if (argc < 2) {
  68                 com_err(argv[0], 0, "Usage: icheck <block number> ...");
  69                 return;
  70         }
  71         if (check_fs_open(argv[0]))
  72                 return;
  73
  74         bw.barray = malloc(sizeof(struct block_info) * argc);
  75         if (!bw.barray) {
  76                 com_err("icheck", ENOMEM,
  77                         "while allocating inode info array");
  78                 return;
  79         }
  80         memset(bw.barray, 0, sizeof(struct block_info) * argc);
  81
  82         block_buf = malloc(current_fs->blocksize * 3);
  83         if (!block_buf) {
  84                 com_err("icheck", ENOMEM, "while allocating block buffer");
  85                 goto error_out;
  86         }
  87
  88         for (i=1; i < argc; i++) {
  89                 if (strtoblk(argv[0], argv[i], NULL, &bw.barray[i-1].blk))
  90                         goto error_out;
  91         }
  92
  93         bw.num_blocks = bw.blocks_left = argc-1;
  94
  95         retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
  96         if (retval) {
  97                 com_err("icheck", retval, "while opening inode scan");
  98                 goto error_out;
  99         }
 100
 101         do {
 102                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
 103         } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 104         if (retval) {
 105                 com_err("icheck", retval, "while starting inode scan");
 106                 goto error_out;
 107         }
 108
 109         while (ino) {
 110                 blk64_t blk;
 111
 112                 if (!inode.i_links_count)
 113                         goto next;
 114
 115                 bw.inode = ino;
 116
 117                 blk = ext2fs_file_acl_block(current_fs, &inode);
 118                 if (blk) {
 119                         icheck_proc(current_fs, &blk, 0,
 120                                     0, 0, &bw);
 121                         if (bw.blocks_left == 0)
 122                                 break;
 123                         ext2fs_file_acl_block_set(current_fs, &inode, blk);
 124                 }
 125
 126                 if (!ext2fs_inode_has_valid_blocks2(current_fs, &inode))
 127                         goto next;
 128                 /*
 129                  * To handle filesystems touched by 0.3c extfs; can be
 130                  * removed later.
 131                  */
 132                 if (inode.i_dtime)
 133                         goto next;
 134
 135                 retval = ext2fs_block_iterate3(current_fs, ino,
 136                                                BLOCK_FLAG_READ_ONLY, block_buf,
 137                                                icheck_proc, &bw);
 138                 if (retval) {
 139                         com_err("icheck", retval,
 140                                 "while calling ext2fs_block_iterate");
 141                         goto next;
 142                 }
 143
 144                 if (bw.blocks_left == 0)
 145                         break;
 146
 147         next:
 148                 do {
 149                         retval = ext2fs_get_next_inode(scan, &ino, &inode);
 150                 } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 151                 if (retval) {
 152                         com_err("icheck", retval,
 153                                 "while doing inode scan");
 154                         goto error_out;
 155                 }
 156         }
 157
 158         printf("Block\tInode number\n");
 159         for (i=0, binfo = bw.barray; i < bw.num_blocks; i++, binfo++) {
 160                 if (binfo->ino == 0) {
 161                         printf("%llu\t<block not found>\n", binfo->blk);
 162                         continue;
 163                 }
 164                 printf("%llu\t%u\n", binfo->blk, binfo->ino);
 165         }
 166
 167 error_out:
 168         free(bw.barray);
 169         free(block_buf);
 170         if (scan)
 171                 ext2fs_close_inode_scan(scan);
 172         return;
 173 }