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 EXT2FS_ATTR((unused)),
  34                        blk_t    *block_nr,
  35                        e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
  36                        blk_t ref_block EXT2FS_ATTR((unused)),
  37                        int ref_offset EXT2FS_ATTR((unused)),
  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].ino && 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                    *block_buf;
  65
  66         if (argc < 2) {
  67                 com_err(argv[0], 0, "Usage: icheck <block number> ...");
  68                 return;
  69         }
  70         if (check_fs_open(argv[0]))
  71                 return;
  72
  73         bw.barray = malloc(sizeof(struct block_info) * argc);
  74         if (!bw.barray) {
  75                 com_err("icheck", ENOMEM,
  76                         "while allocating inode info array");
  77                 return;
  78         }
  79         memset(bw.barray, 0, sizeof(struct block_info) * argc);
  80
  81         block_buf = malloc(current_fs->blocksize * 3);
  82         if (!block_buf) {
  83                 com_err("icheck", ENOMEM, "while allocating block buffer");
  84                 goto error_out;
  85         }
  86
  87         for (i=1; i < argc; i++) {
  88                 if (strtoblk(argv[0], argv[i], &bw.barray[i-1].blk))
  89                         goto error_out;
  90         }
  91
  92         bw.num_blocks = bw.blocks_left = argc-1;
  93
  94         retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
  95         if (retval) {
  96                 com_err("icheck", retval, "while opening inode scan");
  97                 goto error_out;
  98         }
  99
 100         do {
 101                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
 102         } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 103         if (retval) {
 104                 com_err("icheck", retval, "while starting inode scan");
 105                 goto error_out;
 106         }
 107
 108         while (ino) {
 109                 if (!inode.i_links_count)
 110                         goto next;
 111
 112                 bw.inode = ino;
 113
 114                 if (inode.i_file_acl) {
 115                         icheck_proc(current_fs, &inode.i_file_acl, 0,
 116                                     0, 0, &bw);
 117                         if (bw.blocks_left == 0)
 118                                 break;
 119                 }
 120
 121                 if (!ext2fs_inode_has_valid_blocks(&inode))
 122                         goto next;
 123                 /*
 124                  * To handle filesystems touched by 0.3c extfs; can be
 125                  * removed later.
 126                  */
 127                 if (inode.i_dtime)
 128                         goto next;
 129
 130                 retval = ext2fs_block_iterate2(current_fs, ino,
 131                                                BLOCK_FLAG_READ_ONLY, block_buf,
 132                                                icheck_proc, &bw);
 133                 if (retval) {
 134                         com_err("icheck", retval,
 135                                 "while calling ext2fs_block_iterate");
 136                         goto next;
 137                 }
 138
 139                 if (bw.blocks_left == 0)
 140                         break;
 141
 142         next:
 143                 do {
 144                         retval = ext2fs_get_next_inode(scan, &ino, &inode);
 145                 } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 146                 if (retval) {
 147                         com_err("icheck", retval,
 148                                 "while doing inode scan");
 149                         goto error_out;
 150                 }
 151         }
 152
 153         printf("Block\tInode number\n");
 154         for (i=0, binfo = bw.barray; i < bw.num_blocks; i++, binfo++) {
 155                 if (binfo->ino == 0) {
 156                         printf("%u\t<block not found>\n", binfo->blk);
 157                         continue;
 158                 }
 159                 printf("%u\t%u\n", binfo->blk, binfo->ino);
 160         }
 161
 162 error_out:
 163         free(bw.barray);
 164         free(block_buf);
 165         if (scan)
 166                 ext2fs_close_inode_scan(scan);
 167         return;
 168 }