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 <stdio.h>
   9 #include <unistd.h>
  10 #include <stdlib.h>
  11 #include <ctype.h>
  12 #include <string.h>
  13 #include <time.h>
  14 #ifdef HAVE_ERRNO_H
  15 #include <errno.h>
  16 #endif
  17 #include <sys/types.h>
  18
  19 #include "debugfs.h"
  20
  21 struct block_info {
  22         blk_t           blk;
  23         ext2_ino_t      ino;
  24 };
  25
  26 struct block_walk_struct {
  27         struct block_info       *barray;
  28         e2_blkcnt_t             blocks_left;
  29         e2_blkcnt_t             num_blocks;
  30         ext2_ino_t              inode;
  31 };
  32
  33 static int icheck_proc(ext2_filsys fs,
  34                        blk_t    *block_nr,
  35                        e2_blkcnt_t blockcnt,
  36                        blk_t ref_block,
  37                        int ref_offset,
  38                        void *private)
  39 {
  40         struct block_walk_struct *bw = (struct block_walk_struct *) private;
  41         e2_blkcnt_t     i;
  42
  43         for (i=0; i < bw->num_blocks; i++) {
  44                 if (bw->barray[i].blk == *block_nr) {
  45                         bw->barray[i].ino = bw->inode;
  46                         bw->blocks_left--;
  47                 }
  48         }
  49         if (!bw->blocks_left)
  50                 return BLOCK_ABORT;
  51
  52         return 0;
  53 }
  54
  55 void do_icheck(int argc, char **argv)
  56 {
  57         struct block_walk_struct bw;
  58         struct block_info       *binfo;
  59         int                     i;
  60         ext2_inode_scan         scan = 0;
  61         ext2_ino_t              ino;
  62         struct ext2_inode       inode;
  63         errcode_t               retval;
  64         char                    *tmp;
  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                 bw.barray[i-1].blk = strtoul(argv[i], &tmp, 0);
  90                 if (*tmp) {
  91                         com_err(argv[0], 0, "Bad block - %s", argv[i]);
  92                         return;
  93                 }
  94         }
  95
  96         bw.num_blocks = bw.blocks_left = argc-1;
  97
  98         retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
  99         if (retval) {
 100                 com_err("icheck", retval, "while opening inode scan");
 101                 goto error_out;
 102         }
 103
 104         do {
 105                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
 106         } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 107         if (retval) {
 108                 com_err("icheck", retval, "while starting inode scan");
 109                 goto error_out;
 110         }
 111
 112         while (ino) {
 113                 if (!inode.i_links_count)
 114                         goto next;
 115                 if (!ext2fs_inode_has_valid_blocks(&inode))
 116                         goto next;
 117                 /*
 118                  * To handle filesystems touched by 0.3c extfs; can be
 119                  * removed later.
 120                  */
 121                 if (inode.i_dtime)
 122                         goto next;
 123
 124                 bw.inode = ino;
 125
 126                 retval = ext2fs_block_iterate2(current_fs, ino, 0, block_buf,
 127                                                icheck_proc, &bw);
 128                 if (retval) {
 129                         com_err("icheck", retval,
 130                                 "while calling ext2fs_block_iterate");
 131                         goto next;
 132                 }
 133
 134                 if (bw.blocks_left == 0)
 135                         break;
 136
 137         next:
 138                 do {
 139                         retval = ext2fs_get_next_inode(scan, &ino, &inode);
 140                 } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 141                 if (retval) {
 142                         com_err("icheck", retval,
 143                                 "while doing inode scan");
 144                         goto error_out;
 145                 }
 146         }
 147
 148         printf("Block\tInode number\n");
 149         for (i=0, binfo = bw.barray; i < bw.num_blocks; i++, binfo++) {
 150                 if (binfo->ino == 0) {
 151                         printf("%u\t<block not found>\n", binfo->blk);
 152                         continue;
 153                 }
 154                 printf("%u\t%u\n", binfo->blk, binfo->ino);
 155         }
 156
 157 error_out:
 158         free(bw.barray);
 159         free(block_buf);
 160         if (scan)
 161                 ext2fs_close_inode_scan(scan);
 162         return;
 163 }