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, int sci_idx EXT2FS_ATTR((unused)),
  57                void *infop EXT2FS_ATTR((unused)))
  58 {
  59         struct block_walk_struct bw;
  60         struct block_info       *binfo;
  61         int                     i;
  62         ext2_inode_scan         scan = 0;
  63         ext2_ino_t              ino;
  64         struct ext2_inode       inode;
  65         errcode_t               retval;
  66         char                    *block_buf;
  67
  68         if (argc < 2) {
  69                 com_err(argv[0], 0, "Usage: icheck <block number> ...");
  70                 return;
  71         }
  72         if (check_fs_open(argv[0]))
  73                 return;
  74
  75         bw.barray = malloc(sizeof(struct block_info) * argc);
  76         if (!bw.barray) {
  77                 com_err("icheck", ENOMEM,
  78                         "while allocating inode info array");
  79                 return;
  80         }
  81         memset(bw.barray, 0, sizeof(struct block_info) * argc);
  82
  83         block_buf = malloc(current_fs->blocksize * 3);
  84         if (!block_buf) {
  85                 com_err("icheck", ENOMEM, "while allocating block buffer");
  86                 goto error_out;
  87         }
  88
  89         for (i=1; i < argc; i++) {
  90                 if (strtoblk(argv[0], argv[i], NULL, &bw.barray[i-1].blk))
  91                         goto error_out;
  92         }
  93
  94         bw.num_blocks = bw.blocks_left = argc-1;
  95
  96         retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
  97         if (retval) {
  98                 com_err("icheck", retval, "while opening inode scan");
  99                 goto error_out;
 100         }
 101
 102         do {
 103                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
 104         } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 105         if (retval) {
 106                 com_err("icheck", retval, "while starting inode scan");
 107                 goto error_out;
 108         }
 109
 110         while (ino) {
 111                 blk64_t blk;
 112
 113                 if (!inode.i_links_count)
 114                         goto next;
 115
 116                 bw.inode = ino;
 117
 118                 blk = ext2fs_file_acl_block(current_fs, &inode);
 119                 if (blk) {
 120                         icheck_proc(current_fs, &blk, 0,
 121                                     0, 0, &bw);
 122                         if (bw.blocks_left == 0)
 123                                 break;
 124                         ext2fs_file_acl_block_set(current_fs, &inode, blk);
 125                 }
 126
 127                 if (!ext2fs_inode_has_valid_blocks2(current_fs, &inode))
 128                         goto next;
 129                 /*
 130                  * To handle filesystems touched by 0.3c extfs; can be
 131                  * removed later.
 132                  */
 133                 if (inode.i_dtime)
 134                         goto next;
 135
 136                 retval = ext2fs_block_iterate3(current_fs, ino,
 137                                                BLOCK_FLAG_READ_ONLY, block_buf,
 138                                                icheck_proc, &bw);
 139                 if (retval) {
 140                         com_err("icheck", retval,
 141                                 "while calling ext2fs_block_iterate");
 142                         goto next;
 143                 }
 144
 145                 if (bw.blocks_left == 0)
 146                         break;
 147
 148         next:
 149                 do {
 150                         retval = ext2fs_get_next_inode(scan, &ino, &inode);
 151                 } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 152                 if (retval) {
 153                         com_err("icheck", retval,
 154                                 "while doing inode scan");
 155                         goto error_out;
 156                 }
 157         }
 158
 159         printf("Block\tInode number\n");
 160         for (i=0, binfo = bw.barray; i < bw.num_blocks; i++, binfo++) {
 161                 if (binfo->ino == 0) {
 162                         printf("%llu\t<block not found>\n", binfo->blk);
 163                         continue;
 164                 }
 165                 printf("%llu\t%u\n", binfo->blk, binfo->ino);
 166         }
 167
 168 error_out:
 169         free(bw.barray);
 170         free(block_buf);
 171         if (scan)
 172                 ext2fs_close_inode_scan(scan);
 173         return;
 174 }