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 = (time_t) strtoull(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_casefold_map) {
  79                 ext2fs_free_block_bitmap(ctx->inode_casefold_map);
  80                 ctx->inode_casefold_map = 0;
  81         }
  82         if (ctx->inode_link_info) {
  83                 ext2fs_free_icount(ctx->inode_link_info);
  84                 ctx->inode_link_info = 0;
  85         }
  86         if (ctx->journal_io) {
  87                 if (ctx->fs && ctx->fs->io != ctx->journal_io)
  88                         io_channel_close(ctx->journal_io);
  89                 ctx->journal_io = 0;
  90         }
  91         if (ctx->fs && ctx->fs->dblist) {
  92                 ext2fs_free_dblist(ctx->fs->dblist);
  93                 ctx->fs->dblist = 0;
  94         }
  95         e2fsck_free_dir_info(ctx);
  96         e2fsck_free_dx_dir_info(ctx);
  97         if (ctx->refcount) {
  98                 ea_refcount_free(ctx->refcount);
  99                 ctx->refcount = 0;
 100         }
 101         if (ctx->refcount_extra) {
 102                 ea_refcount_free(ctx->refcount_extra);
 103                 ctx->refcount_extra = 0;
 104         }
 105         if (ctx->ea_block_quota_blocks) {
 106                 ea_refcount_free(ctx->ea_block_quota_blocks);
 107                 ctx->ea_block_quota_blocks = 0;
 108         }
 109         if (ctx->ea_block_quota_inodes) {
 110                 ea_refcount_free(ctx->ea_block_quota_inodes);
 111                 ctx->ea_block_quota_inodes = 0;
 112         }
 113         if (ctx->ea_inode_refs) {
 114                 ea_refcount_free(ctx->ea_inode_refs);
 115                 ctx->ea_inode_refs = 0;
 116         }
 117         if (ctx->block_dup_map) {
 118                 ext2fs_free_block_bitmap(ctx->block_dup_map);
 119                 ctx->block_dup_map = 0;
 120         }
 121         if (ctx->block_ea_map) {
 122                 ext2fs_free_block_bitmap(ctx->block_ea_map);
 123                 ctx->block_ea_map = 0;
 124         }
 125         if (ctx->block_metadata_map) {
 126                 ext2fs_free_block_bitmap(ctx->block_metadata_map);
 127                 ctx->block_metadata_map = 0;
 128         }
 129         if (ctx->inode_bb_map) {
 130                 ext2fs_free_inode_bitmap(ctx->inode_bb_map);
 131                 ctx->inode_bb_map = 0;
 132         }
 133         if (ctx->inode_bad_map) {
 134                 ext2fs_free_inode_bitmap(ctx->inode_bad_map);
 135                 ctx->inode_bad_map = 0;
 136         }
 137         if (ctx->inode_imagic_map) {
 138                 ext2fs_free_inode_bitmap(ctx->inode_imagic_map);
 139                 ctx->inode_imagic_map = 0;
 140         }
 141         if (ctx->dirs_to_hash) {
 142                 ext2fs_u32_list_free(ctx->dirs_to_hash);
 143                 ctx->dirs_to_hash = 0;
 144         }
 145         destroy_encrypted_file_info(ctx);
 146
 147         /*
 148          * Clear the array of invalid meta-data flags
 149          */
 150         if (ctx->invalid_inode_bitmap_flag) {
 151                 ext2fs_free_mem(&ctx->invalid_inode_bitmap_flag);
 152                 ctx->invalid_inode_bitmap_flag = 0;
 153         }
 154         if (ctx->invalid_block_bitmap_flag) {
 155                 ext2fs_free_mem(&ctx->invalid_block_bitmap_flag);
 156                 ctx->invalid_block_bitmap_flag = 0;
 157         }
 158         if (ctx->invalid_inode_table_flag) {
 159                 ext2fs_free_mem(&ctx->invalid_inode_table_flag);
 160                 ctx->invalid_inode_table_flag = 0;
 161         }
 162         if (ctx->casefolded_dirs) {
 163                 ext2fs_u32_list_free(ctx->casefolded_dirs);
 164                 ctx->casefolded_dirs = 0;
 165         }
 166         if (ctx->inode_count) {
 167                 ext2fs_free_icount(ctx->inode_count);
 168                 ctx->inode_count = 0;
 169         }
 170
 171         /* Clear statistic counters */
 172         ctx->fs_directory_count = 0;
 173         ctx->fs_regular_count = 0;
 174         ctx->fs_blockdev_count = 0;
 175         ctx->fs_chardev_count = 0;
 176         ctx->fs_links_count = 0;
 177         ctx->fs_symlinks_count = 0;
 178         ctx->fs_fast_symlinks_count = 0;
 179         ctx->fs_fifo_count = 0;
 180         ctx->fs_total_count = 0;
 181         ctx->fs_badblocks_count = 0;
 182         ctx->fs_sockets_count = 0;
 183         ctx->fs_ind_count = 0;
 184         ctx->fs_dind_count = 0;
 185         ctx->fs_tind_count = 0;
 186         ctx->fs_fragmented = 0;
 187         ctx->fs_fragmented_dir = 0;
 188         ctx->large_files = 0;
 189         ctx->large_dirs = 0;
 190
 191         for (i=0; i < MAX_EXTENT_DEPTH_COUNT; i++)
 192                 ctx->extent_depth_count[i] = 0;
 193
 194         /* Reset the superblock to the user's requested value */
 195         ctx->superblock = ctx->use_superblock;
 196
 197         return 0;
 198 }
 199
 200 void e2fsck_free_context(e2fsck_t ctx)
 201 {
 202         if (!ctx)
 203                 return;
 204
 205         e2fsck_reset_context(ctx);
 206         if (ctx->blkid)
 207                 blkid_put_cache(ctx->blkid);
 208
 209         if (ctx->profile)
 210                 profile_release(ctx->profile);
 211
 212         if (ctx->filesystem_name)
 213                 ext2fs_free_mem(&ctx->filesystem_name);
 214
 215         if (ctx->device_name)
 216                 ext2fs_free_mem(&ctx->device_name);
 217
 218         if (ctx->log_fn)
 219                 free(ctx->log_fn);
 220
 221         if (ctx->logf)
 222                 fclose(ctx->logf);
 223
 224         if (ctx->problem_log_fn)
 225                 free(ctx->problem_log_fn);
 226
 227         if (ctx->problem_logf) {
 228                 fputs("</problem_log>\n", ctx->problem_logf);
 229                 fclose(ctx->problem_logf);
 230         }
 231         ext2fs_free_mem(&ctx);
 232 }
 233
 234 /*
 235  * This function runs through the e2fsck passes and calls them all,
 236  * returning restart, abort, or cancel as necessary...
 237  */
 238 typedef void (*pass_t)(e2fsck_t ctx);
 239
 240 static pass_t e2fsck_passes[] = {
 241         e2fsck_pass1, e2fsck_pass1e, e2fsck_pass2, e2fsck_pass3,
 242         e2fsck_pass4, e2fsck_pass5, 0 };
 243
 244 int e2fsck_run(e2fsck_t ctx)
 245 {
 246         int     i;
 247         pass_t  e2fsck_pass;
 248
 249 #ifdef HAVE_SETJMP_H
 250         if (setjmp(ctx->abort_loc)) {
 251                 ctx->flags &= ~E2F_FLAG_SETJMP_OK;
 252                 return (ctx->flags & E2F_FLAG_RUN_RETURN);
 253         }
 254         ctx->flags |= E2F_FLAG_SETJMP_OK;
 255 #endif
 256
 257         for (i=0; (e2fsck_pass = e2fsck_passes[i]); i++) {
 258                 if (ctx->flags & E2F_FLAG_RUN_RETURN)
 259                         break;
 260                 if (e2fsck_mmp_update(ctx->fs))
 261                         fatal_error(ctx, 0);
 262                 e2fsck_pass(ctx);
 263                 if (ctx->progress)
 264                         (void) (ctx->progress)(ctx, 0, 0, 0);
 265         }
 266         ctx->flags &= ~E2F_FLAG_SETJMP_OK;
 267
 268         if (ctx->flags & E2F_FLAG_RUN_RETURN)
 269                 return (ctx->flags & E2F_FLAG_RUN_RETURN);
 270         return 0;
 271 }