e2fsck/pass4.c

   1 /*
   2  * pass4.c -- pass #4 of e2fsck: Check reference counts
   3  *
   4  * Copyright (C) 1993 Theodore Ts'o.  This file may be redistributed
   5  * under the terms of the GNU Public License.
   6  *
   7  */
   8
   9 #include "e2fsck.h"
  10
  11 void pass4(ext2_filsys fs)
  12 {
  13         ino_t   i;
  14         struct ext2_inode       inode;
  15         struct resource_track   rtrack;
  16
  17         init_resource_track(&rtrack);
  18
  19 #ifdef MTRACE
  20         mtrace_print("Pass 4");
  21 #endif
  22
  23         if (!preen)
  24                 printf("Pass 4: Checking reference counts\n");
  25         for (i=1; i <= fs->super->s_inodes_count; i++) {
  26                 if (i == EXT2_BAD_INO ||
  27                     (i > EXT2_ROOT_INO && i < EXT2_FIRST_INO))
  28                         continue;
  29                 if (!(ext2fs_test_inode_bitmap(inode_used_map, i)))
  30                         continue;
  31                 if (inode_count[i] == 0) {
  32                         /*
  33                          * Inode isn't attached to the filesystem;
  34                          * prompt to reconnect.
  35                          */
  36                         printf("Unattached inode %lu\n", i);
  37                         preenhalt();
  38                         if (ask("Connect to /lost+found", 1)) {
  39                                 if (reconnect_file(fs, i))
  40                                         ext2fs_unmark_valid(fs);
  41                         } else
  42                                 ext2fs_unmark_valid(fs);
  43                 }
  44                 if (inode_count[i] != inode_link_info[i]) {
  45                         e2fsck_read_inode(fs, i, &inode, "pass4");
  46                         if (inode_link_info[i] != inode.i_links_count) {
  47                                 printf("WARNING: PROGRAMMING BUG IN E2FSCK!\n");
  48                                 printf("inode_link_info[%d] is %lu, "
  49                                        "inode.i_links_count is %d.  "
  50                                        "They should be the same!\n",
  51                                        i, inode_link_info[i],
  52                                        inode.i_links_count);
  53                         }
  54                         printf("Inode %lu has ref count %d, expecting %d.\n",
  55                                i, inode.i_links_count, inode_count[i]);
  56                         if (ask("Set i_nlinks to count", 1)) {
  57                                 inode.i_links_count = inode_count[i];
  58                                 e2fsck_write_inode(fs, i, &inode, "pass4");
  59                         } else
  60                                 ext2fs_unmark_valid(fs);
  61                 }
  62         }
  63         free(inode_link_info);  inode_link_info = 0;
  64         free(inode_count);      inode_count = 0;
  65         if (tflag > 1) {
  66                 printf("Pass 4: ");
  67                 print_resource_track(&rtrack);
  68         }
  69 }
  70