Logo Search packages:      
Sourcecode: lde version File versions  Download package

icheck.c

/*
 * icheck.c --- given a list of blocks, generate a list of inodes
 * 
 * Copyright (C) 1994 Theodore Ts'o.  This file may be redistributed
 * under the terms of the GNU Public License.
 */

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <time.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "debugfs.h"

struct block_info {
      blk_t blk;
      ino_t ino;
};

struct block_walk_struct {
      struct block_info *barray;
      int               blocks_left;
      int               num_blocks;
      ino_t             inode;
};

int icheck_proc(ext2_filsys fs,
            blk_t *block_nr,
            int blockcnt,
            void *private)
{
      struct block_walk_struct *bw = (struct block_walk_struct *) private;
      int   i;

      for (i=0; i < bw->num_blocks; i++) {
            if (bw->barray[i].blk == *block_nr) {
                  bw->barray[i].ino = bw->inode;
                  bw->blocks_left--;
            }
      }
      if (!bw->blocks_left)
            return BLOCK_ABORT;
      
      return 0;
}

void do_icheck(int argc, char **argv)
{
      struct block_walk_struct bw;
      struct block_info *binfo;
      int               i;
      ext2_inode_scan         scan = 0;
      ino_t             ino;
      struct ext2_inode inode;
      errcode_t         retval;
      char              *tmp;
      char              *block_buf;
      
      if (argc < 2) {
            com_err(argv[0], 0, "Usage: icheck <block number> ...");
            return;
      }
      if (check_fs_open(argv[0]))
            return;

      bw.barray = malloc(sizeof(struct block_info) * argc);
      if (!bw.barray) {
            com_err("icheck", ENOMEM,
                  "while allocating inode info array");
            return;
      }
      memset(bw.barray, 0, sizeof(struct block_info) * argc);

      block_buf = malloc(fs->blocksize * 3);
      if (!block_buf) {
            com_err("icheck", ENOMEM, "while allocating block buffer");
            goto error_out;
      }

      for (i=1; i < argc; i++) {
            bw.barray[i-1].blk = strtol(argv[i], &tmp, 0);
            if (*tmp) {
                  com_err(argv[0], 0, "Bad block - %s", argv[i]);
                  return;
            }
      }

      bw.num_blocks = bw.blocks_left = argc-1;

      retval = ext2fs_open_inode_scan(fs, 0, &scan);
      if (retval) {
            com_err("icheck", retval, "while opening inode scan");
            goto error_out;
      }

      retval = ext2fs_get_next_inode(scan, &ino, &inode);
      if (retval) {
            com_err("icheck", retval, "while starting inode scan");
            goto error_out;
      }
      
      while (ino) {
            if (!inode.i_links_count)
                  goto next;
            /*
             * To handle filesystems touched by 0.3c extfs; can be
             * removed later.
             */
            if (inode.i_dtime)
                  goto next;

            bw.inode = ino;
            
            retval = ext2fs_block_iterate(fs, ino, 0, block_buf,
                                    icheck_proc, &bw);
            if (retval) {
                  com_err("icheck", retval,
                        "while calling ext2_block_iterate");
                  goto next;
            }

            if (bw.blocks_left == 0)
                  break;

      next:
            retval = ext2fs_get_next_inode(scan, &ino, &inode);
            if (retval) {
                  com_err("icheck", retval,
                        "while doing inode scan");
                  goto error_out;
            }
      }

      printf("Block\tInode number\n");
      for (i=0, binfo = bw.barray; i < bw.num_blocks; i++, binfo++) {
            if (binfo->ino == 0) {
                  printf("%ld\t<block not found>\n", binfo->blk);
                  continue;
            }
            printf("%ld\t%ld\n", binfo->blk, binfo->ino);
      }

error_out:
      free(bw.barray);
      free(block_buf);
      if (scan)
            ext2fs_close_inode_scan(scan);
      return;
}




Generated by  Doxygen 1.6.0   Back to index