e2fsck/e2fsck.c

   1 /*
   2  * e2fsck.c - a consistency checker for the new extended file system.
   3  *
   4  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  */
  11
  12 #include "config.h"
  13 #include <errno.h>
  14
  15 #include "e2fsck.h"
  16 #include "problem.h"
  17
  18 /*
  19  * This function allocates an e2fsck context
  20  */
  21 errcode_t e2fsck_allocate_context(e2fsck_t *ret)
  22 {
  23         e2fsck_t        context;
  24         errcode_t       retval;
  25         char            *time_env;
  26
  27         retval = ext2fs_get_mem(sizeof(struct e2fsck_struct), &context);
  28         if (retval)
  29                 return retval;
  30
  31         memset(context, 0, sizeof(struct e2fsck_struct));
  32
  33         context->process_inode_size = 256;
  34         context->ext_attr_ver = 2;
  35         context->blocks_per_page = 1;
  36         context->htree_slack_percentage = 255;
  37
  38         time_env = getenv("E2FSCK_TIME");
  39         if (time_env)
  40                 context->now = strtoul(time_env, NULL, 0);
  41         else {
  42                 context->now = time(0);
  43                 if (context->now < 1262322000) /* January 1 2010 */
  44                         context->flags |= E2F_FLAG_TIME_INSANE;
  45         }
  46
  47         *ret = context;
  48         return 0;
  49 }
  50
  51 /*
  52  * This function resets an e2fsck context; it is called when e2fsck
  53  * needs to be restarted.
  54  */
  55 errcode_t e2fsck_reset_context(e2fsck_t ctx)
  56 {
  57         int     i;
  58
  59         ctx->flags &= E2F_RESET_FLAGS;
  60         ctx->lost_and_found = 0;
  61         ctx->bad_lost_and_found = 0;
  62         if (ctx->inode_used_map) {
  63                 ext2fs_free_inode_bitmap(ctx->inode_used_map);
  64                 ctx->inode_used_map = 0;
  65         }
  66         if (ctx->inode_dir_map) {
  67                 ext2fs_free_inode_bitmap(ctx->inode_dir_map);
  68                 ctx->inode_dir_map = 0;
  69         }
  70         if (ctx->inode_reg_map) {
  71                 ext2fs_free_inode_bitmap(ctx->inode_reg_map);
  72                 ctx->inode_reg_map = 0;
  73         }
  74         if (ctx->block_found_map) {
  75                 ext2fs_free_block_bitmap(ctx->block_found_map);
  76                 ctx->block_found_map = 0;
  77         }
  78         if (ctx->inode_link_info) {
  79                 ext2fs_free_icount(ctx->inode_link_info);
  80                 ctx->inode_link_info = 0;
  81         }
  82         if (ctx->journal_io) {
  83                 if (ctx->fs && ctx->fs->io != ctx->journal_io)
  84                         io_channel_close(ctx->journal_io);
  85                 ctx->journal_io = 0;
  86         }
  87         if (ctx->fs && ctx->fs->dblist) {
  88                 ext2fs_free_dblist(ctx->fs->dblist);
  89                 ctx->fs->dblist = 0;
  90         }
  91         e2fsck_free_dir_info(ctx);
  92 #ifdef ENABLE_HTREE
  93         e2fsck_free_dx_dir_info(ctx);
  94 #endif
  95         if (ctx->refcount) {
  96                 ea_refcount_free(ctx->refcount);
  97                 ctx->refcount = 0;
  98         }
  99         if (ctx->refcount_extra) {
 100                 ea_refcount_free(ctx->refcount_extra);
 101                 ctx->refcount_extra = 0;
 102         }
 103         if (ctx->block_dup_map) {
 104                 ext2fs_free_block_bitmap(ctx->block_dup_map);
 105                 ctx->block_dup_map = 0;
 106         }
 107         if (ctx->block_ea_map) {
 108                 ext2fs_free_block_bitmap(ctx->block_ea_map);
 109                 ctx->block_ea_map = 0;
 110         }
 111         if (ctx->block_metadata_map) {
 112                 ext2fs_free_block_bitmap(ctx->block_metadata_map);
 113                 ctx->block_metadata_map = 0;
 114         }
 115         if (ctx->inode_bb_map) {
 116                 ext2fs_free_inode_bitmap(ctx->inode_bb_map);
 117                 ctx->inode_bb_map = 0;
 118         }
 119         if (ctx->inode_bad_map) {
 120                 ext2fs_free_inode_bitmap(ctx->inode_bad_map);
 121                 ctx->inode_bad_map = 0;
 122         }
 123         if (ctx->inode_imagic_map) {
 124                 ext2fs_free_inode_bitmap(ctx->inode_imagic_map);
 125                 ctx->inode_imagic_map = 0;
 126         }
 127         if (ctx->dirs_to_hash) {
 128                 ext2fs_u32_list_free(ctx->dirs_to_hash);
 129                 ctx->dirs_to_hash = 0;
 130         }
 131
 132         /*
 133          * Clear the array of invalid meta-data flags
 134          */
 135         if (ctx->invalid_inode_bitmap_flag) {
 136                 ext2fs_free_mem(&ctx->invalid_inode_bitmap_flag);
 137                 ctx->invalid_inode_bitmap_flag = 0;
 138         }
 139         if (ctx->invalid_block_bitmap_flag) {
 140                 ext2fs_free_mem(&ctx->invalid_block_bitmap_flag);
 141                 ctx->invalid_block_bitmap_flag = 0;
 142         }
 143         if (ctx->invalid_inode_table_flag) {
 144                 ext2fs_free_mem(&ctx->invalid_inode_table_flag);
 145                 ctx->invalid_inode_table_flag = 0;
 146         }
 147
 148         /* Clear statistic counters */
 149         ctx->fs_directory_count = 0;
 150         ctx->fs_regular_count = 0;
 151         ctx->fs_blockdev_count = 0;
 152         ctx->fs_chardev_count = 0;
 153         ctx->fs_links_count = 0;
 154         ctx->fs_symlinks_count = 0;
 155         ctx->fs_fast_symlinks_count = 0;
 156         ctx->fs_fifo_count = 0;
 157         ctx->fs_total_count = 0;
 158         ctx->fs_badblocks_count = 0;
 159         ctx->fs_sockets_count = 0;
 160         ctx->fs_ind_count = 0;
 161         ctx->fs_dind_count = 0;
 162         ctx->fs_tind_count = 0;
 163         ctx->fs_fragmented = 0;
 164         ctx->fs_fragmented_dir = 0;
 165         ctx->large_files = 0;
 166
 167         for (i=0; i < MAX_EXTENT_DEPTH_COUNT; i++)
 168                 ctx->extent_depth_count[i] = 0;
 169
 170         /* Reset the superblock to the user's requested value */
 171         ctx->superblock = ctx->use_superblock;
 172
 173         return 0;
 174 }
 175
 176 void e2fsck_free_context(e2fsck_t ctx)
 177 {
 178         if (!ctx)
 179                 return;
 180
 181         e2fsck_reset_context(ctx);
 182         if (ctx->blkid)
 183                 blkid_put_cache(ctx->blkid);
 184
 185         if (ctx->profile)
 186                 profile_release(ctx->profile);
 187
 188         if (ctx->filesystem_name)
 189                 ext2fs_free_mem(&ctx->filesystem_name);
 190
 191         if (ctx->device_name)
 192                 ext2fs_free_mem(&ctx->device_name);
 193
 194         if (ctx->log_fn)
 195                 free(ctx->log_fn);
 196
 197         ext2fs_free_mem(&ctx);
 198 }
 199
 200 /*
 201  * This function runs through the e2fsck passes and calls them all,
 202  * returning restart, abort, or cancel as necessary...
 203  */
 204 typedef void (*pass_t)(e2fsck_t ctx);
 205
 206 static pass_t e2fsck_passes[] = {
 207         e2fsck_pass1, e2fsck_pass2, e2fsck_pass3, e2fsck_pass4,
 208         e2fsck_pass5, 0 };
 209
 210 #define E2F_FLAG_RUN_RETURN     (E2F_FLAG_SIGNAL_MASK|E2F_FLAG_RESTART)
 211
 212 int e2fsck_run(e2fsck_t ctx)
 213 {
 214         int     i;
 215         pass_t  e2fsck_pass;
 216
 217 #ifdef HAVE_SETJMP_H
 218         if (setjmp(ctx->abort_loc)) {
 219                 ctx->flags &= ~E2F_FLAG_SETJMP_OK;
 220                 return (ctx->flags & E2F_FLAG_RUN_RETURN);
 221         }
 222         ctx->flags |= E2F_FLAG_SETJMP_OK;
 223 #endif
 224
 225         for (i=0; (e2fsck_pass = e2fsck_passes[i]); i++) {
 226                 if (ctx->flags & E2F_FLAG_RUN_RETURN)
 227                         break;
 228                 if (e2fsck_mmp_update(ctx->fs))
 229                         fatal_error(ctx, 0);
 230                 e2fsck_pass(ctx);
 231                 if (ctx->progress)
 232                         (void) (ctx->progress)(ctx, 0, 0, 0);
 233         }
 234         ctx->flags &= ~E2F_FLAG_SETJMP_OK;
 235
 236         if (ctx->flags & E2F_FLAG_RUN_RETURN)
 237                 return (ctx->flags & E2F_FLAG_RUN_RETURN);
 238         return 0;
 239 }