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path: root/e2fsprogs/e2fsck/pass5.c
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Diffstat (limited to 'e2fsprogs/e2fsck/pass5.c')
-rw-r--r--e2fsprogs/e2fsck/pass5.c547
1 files changed, 547 insertions, 0 deletions
diff --git a/e2fsprogs/e2fsck/pass5.c b/e2fsprogs/e2fsck/pass5.c
new file mode 100644
index 0000000..e708fa4
--- /dev/null
+++ b/e2fsprogs/e2fsck/pass5.c
@@ -0,0 +1,547 @@
+/*
+ * pass5.c --- check block and inode bitmaps against on-disk bitmaps
+ *
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ *
+ */
+
+#include "e2fsck.h"
+#include "problem.h"
+
+static void check_block_bitmaps(e2fsck_t ctx);
+static void check_inode_bitmaps(e2fsck_t ctx);
+static void check_inode_end(e2fsck_t ctx);
+static void check_block_end(e2fsck_t ctx);
+
+void e2fsck_pass5(e2fsck_t ctx)
+{
+#ifdef RESOURCE_TRACK
+ struct resource_track rtrack;
+#endif
+ struct problem_context pctx;
+
+#ifdef MTRACE
+ mtrace_print("Pass 5");
+#endif
+
+#ifdef RESOURCE_TRACK
+ init_resource_track(&rtrack);
+#endif
+
+ clear_problem_context(&pctx);
+
+ if (!(ctx->options & E2F_OPT_PREEN))
+ fix_problem(ctx, PR_5_PASS_HEADER, &pctx);
+
+ if (ctx->progress)
+ if ((ctx->progress)(ctx, 5, 0, ctx->fs->group_desc_count*2))
+ return;
+
+ e2fsck_read_bitmaps(ctx);
+
+ check_block_bitmaps(ctx);
+ if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
+ return;
+ check_inode_bitmaps(ctx);
+ if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
+ return;
+ check_inode_end(ctx);
+ if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
+ return;
+ check_block_end(ctx);
+ if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
+ return;
+
+ ext2fs_free_inode_bitmap(ctx->inode_used_map);
+ ctx->inode_used_map = 0;
+ ext2fs_free_inode_bitmap(ctx->inode_dir_map);
+ ctx->inode_dir_map = 0;
+ ext2fs_free_block_bitmap(ctx->block_found_map);
+ ctx->block_found_map = 0;
+
+#ifdef RESOURCE_TRACK
+ if (ctx->options & E2F_OPT_TIME2) {
+ e2fsck_clear_progbar(ctx);
+ print_resource_track(_("Pass 5"), &rtrack);
+ }
+#endif
+}
+
+#define NO_BLK ((blk_t) -1)
+
+static void print_bitmap_problem(e2fsck_t ctx, int problem,
+ struct problem_context *pctx)
+{
+ switch (problem) {
+ case PR_5_BLOCK_UNUSED:
+ if (pctx->blk == pctx->blk2)
+ pctx->blk2 = 0;
+ else
+ problem = PR_5_BLOCK_RANGE_UNUSED;
+ break;
+ case PR_5_BLOCK_USED:
+ if (pctx->blk == pctx->blk2)
+ pctx->blk2 = 0;
+ else
+ problem = PR_5_BLOCK_RANGE_USED;
+ break;
+ case PR_5_INODE_UNUSED:
+ if (pctx->ino == pctx->ino2)
+ pctx->ino2 = 0;
+ else
+ problem = PR_5_INODE_RANGE_UNUSED;
+ break;
+ case PR_5_INODE_USED:
+ if (pctx->ino == pctx->ino2)
+ pctx->ino2 = 0;
+ else
+ problem = PR_5_INODE_RANGE_USED;
+ break;
+ }
+ fix_problem(ctx, problem, pctx);
+ pctx->blk = pctx->blk2 = NO_BLK;
+ pctx->ino = pctx->ino2 = 0;
+}
+
+static void check_block_bitmaps(e2fsck_t ctx)
+{
+ ext2_filsys fs = ctx->fs;
+ blk_t i;
+ int *free_array;
+ int group = 0;
+ unsigned int blocks = 0;
+ unsigned int free_blocks = 0;
+ int group_free = 0;
+ int actual, bitmap;
+ struct problem_context pctx;
+ int problem, save_problem, fixit, had_problem;
+ errcode_t retval;
+
+ clear_problem_context(&pctx);
+ free_array = (int *) e2fsck_allocate_memory(ctx,
+ fs->group_desc_count * sizeof(int), "free block count array");
+
+ if ((fs->super->s_first_data_block <
+ ext2fs_get_block_bitmap_start(ctx->block_found_map)) ||
+ (fs->super->s_blocks_count-1 >
+ ext2fs_get_block_bitmap_end(ctx->block_found_map))) {
+ pctx.num = 1;
+ pctx.blk = fs->super->s_first_data_block;
+ pctx.blk2 = fs->super->s_blocks_count -1;
+ pctx.ino = ext2fs_get_block_bitmap_start(ctx->block_found_map);
+ pctx.ino2 = ext2fs_get_block_bitmap_end(ctx->block_found_map);
+ fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
+
+ ctx->flags |= E2F_FLAG_ABORT; /* fatal */
+ return;
+ }
+
+ if ((fs->super->s_first_data_block <
+ ext2fs_get_block_bitmap_start(fs->block_map)) ||
+ (fs->super->s_blocks_count-1 >
+ ext2fs_get_block_bitmap_end(fs->block_map))) {
+ pctx.num = 2;
+ pctx.blk = fs->super->s_first_data_block;
+ pctx.blk2 = fs->super->s_blocks_count -1;
+ pctx.ino = ext2fs_get_block_bitmap_start(fs->block_map);
+ pctx.ino2 = ext2fs_get_block_bitmap_end(fs->block_map);
+ fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
+
+ ctx->flags |= E2F_FLAG_ABORT; /* fatal */
+ return;
+ }
+
+redo_counts:
+ had_problem = 0;
+ save_problem = 0;
+ pctx.blk = pctx.blk2 = NO_BLK;
+ for (i = fs->super->s_first_data_block;
+ i < fs->super->s_blocks_count;
+ i++) {
+ actual = ext2fs_fast_test_block_bitmap(ctx->block_found_map, i);
+ bitmap = ext2fs_fast_test_block_bitmap(fs->block_map, i);
+
+ if (actual == bitmap)
+ goto do_counts;
+
+ if (!actual && bitmap) {
+ /*
+ * Block not used, but marked in use in the bitmap.
+ */
+ problem = PR_5_BLOCK_UNUSED;
+ } else {
+ /*
+ * Block used, but not marked in use in the bitmap.
+ */
+ problem = PR_5_BLOCK_USED;
+ }
+ if (pctx.blk == NO_BLK) {
+ pctx.blk = pctx.blk2 = i;
+ save_problem = problem;
+ } else {
+ if ((problem == save_problem) &&
+ (pctx.blk2 == i-1))
+ pctx.blk2++;
+ else {
+ print_bitmap_problem(ctx, save_problem, &pctx);
+ pctx.blk = pctx.blk2 = i;
+ save_problem = problem;
+ }
+ }
+ ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
+ had_problem++;
+
+ do_counts:
+ if (!bitmap) {
+ group_free++;
+ free_blocks++;
+ }
+ blocks ++;
+ if ((blocks == fs->super->s_blocks_per_group) ||
+ (i == fs->super->s_blocks_count-1)) {
+ free_array[group] = group_free;
+ group ++;
+ blocks = 0;
+ group_free = 0;
+ if (ctx->progress)
+ if ((ctx->progress)(ctx, 5, group,
+ fs->group_desc_count*2))
+ return;
+ }
+ }
+ if (pctx.blk != NO_BLK)
+ print_bitmap_problem(ctx, save_problem, &pctx);
+ if (had_problem)
+ fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP);
+ else
+ fixit = -1;
+ ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
+
+ if (fixit == 1) {
+ ext2fs_free_block_bitmap(fs->block_map);
+ retval = ext2fs_copy_bitmap(ctx->block_found_map,
+ &fs->block_map);
+ if (retval) {
+ clear_problem_context(&pctx);
+ fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT;
+ return;
+ }
+ ext2fs_set_bitmap_padding(fs->block_map);
+ ext2fs_mark_bb_dirty(fs);
+
+ /* Redo the counts */
+ blocks = 0; free_blocks = 0; group_free = 0; group = 0;
+ memset(free_array, 0, fs->group_desc_count * sizeof(int));
+ goto redo_counts;
+ } else if (fixit == 0)
+ ext2fs_unmark_valid(fs);
+
+ for (i = 0; i < fs->group_desc_count; i++) {
+ if (free_array[i] != fs->group_desc[i].bg_free_blocks_count) {
+ pctx.group = i;
+ pctx.blk = fs->group_desc[i].bg_free_blocks_count;
+ pctx.blk2 = free_array[i];
+
+ if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP,
+ &pctx)) {
+ fs->group_desc[i].bg_free_blocks_count =
+ free_array[i];
+ ext2fs_mark_super_dirty(fs);
+ } else
+ ext2fs_unmark_valid(fs);
+ }
+ }
+ if (free_blocks != fs->super->s_free_blocks_count) {
+ pctx.group = 0;
+ pctx.blk = fs->super->s_free_blocks_count;
+ pctx.blk2 = free_blocks;
+
+ if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) {
+ fs->super->s_free_blocks_count = free_blocks;
+ ext2fs_mark_super_dirty(fs);
+ } else
+ ext2fs_unmark_valid(fs);
+ }
+ ext2fs_free_mem(&free_array);
+}
+
+static void check_inode_bitmaps(e2fsck_t ctx)
+{
+ ext2_filsys fs = ctx->fs;
+ ext2_ino_t i;
+ unsigned int free_inodes = 0;
+ int group_free = 0;
+ int dirs_count = 0;
+ int group = 0;
+ unsigned int inodes = 0;
+ int *free_array;
+ int *dir_array;
+ int actual, bitmap;
+ errcode_t retval;
+ struct problem_context pctx;
+ int problem, save_problem, fixit, had_problem;
+
+ clear_problem_context(&pctx);
+ free_array = (int *) e2fsck_allocate_memory(ctx,
+ fs->group_desc_count * sizeof(int), "free inode count array");
+
+ dir_array = (int *) e2fsck_allocate_memory(ctx,
+ fs->group_desc_count * sizeof(int), "directory count array");
+
+ if ((1 < ext2fs_get_inode_bitmap_start(ctx->inode_used_map)) ||
+ (fs->super->s_inodes_count >
+ ext2fs_get_inode_bitmap_end(ctx->inode_used_map))) {
+ pctx.num = 3;
+ pctx.blk = 1;
+ pctx.blk2 = fs->super->s_inodes_count;
+ pctx.ino = ext2fs_get_inode_bitmap_start(ctx->inode_used_map);
+ pctx.ino2 = ext2fs_get_inode_bitmap_end(ctx->inode_used_map);
+ fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
+
+ ctx->flags |= E2F_FLAG_ABORT; /* fatal */
+ return;
+ }
+ if ((1 < ext2fs_get_inode_bitmap_start(fs->inode_map)) ||
+ (fs->super->s_inodes_count >
+ ext2fs_get_inode_bitmap_end(fs->inode_map))) {
+ pctx.num = 4;
+ pctx.blk = 1;
+ pctx.blk2 = fs->super->s_inodes_count;
+ pctx.ino = ext2fs_get_inode_bitmap_start(fs->inode_map);
+ pctx.ino2 = ext2fs_get_inode_bitmap_end(fs->inode_map);
+ fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
+
+ ctx->flags |= E2F_FLAG_ABORT; /* fatal */
+ return;
+ }
+
+redo_counts:
+ had_problem = 0;
+ save_problem = 0;
+ pctx.ino = pctx.ino2 = 0;
+ for (i = 1; i <= fs->super->s_inodes_count; i++) {
+ actual = ext2fs_fast_test_inode_bitmap(ctx->inode_used_map, i);
+ bitmap = ext2fs_fast_test_inode_bitmap(fs->inode_map, i);
+
+ if (actual == bitmap)
+ goto do_counts;
+
+ if (!actual && bitmap) {
+ /*
+ * Inode wasn't used, but marked in bitmap
+ */
+ problem = PR_5_INODE_UNUSED;
+ } else /* if (actual && !bitmap) */ {
+ /*
+ * Inode used, but not in bitmap
+ */
+ problem = PR_5_INODE_USED;
+ }
+ if (pctx.ino == 0) {
+ pctx.ino = pctx.ino2 = i;
+ save_problem = problem;
+ } else {
+ if ((problem == save_problem) &&
+ (pctx.ino2 == i-1))
+ pctx.ino2++;
+ else {
+ print_bitmap_problem(ctx, save_problem, &pctx);
+ pctx.ino = pctx.ino2 = i;
+ save_problem = problem;
+ }
+ }
+ ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
+ had_problem++;
+
+do_counts:
+ if (!bitmap) {
+ group_free++;
+ free_inodes++;
+ } else {
+ if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, i))
+ dirs_count++;
+ }
+ inodes++;
+ if ((inodes == fs->super->s_inodes_per_group) ||
+ (i == fs->super->s_inodes_count)) {
+ free_array[group] = group_free;
+ dir_array[group] = dirs_count;
+ group ++;
+ inodes = 0;
+ group_free = 0;
+ dirs_count = 0;
+ if (ctx->progress)
+ if ((ctx->progress)(ctx, 5,
+ group + fs->group_desc_count,
+ fs->group_desc_count*2))
+ return;
+ }
+ }
+ if (pctx.ino)
+ print_bitmap_problem(ctx, save_problem, &pctx);
+
+ if (had_problem)
+ fixit = end_problem_latch(ctx, PR_LATCH_IBITMAP);
+ else
+ fixit = -1;
+ ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
+
+ if (fixit == 1) {
+ ext2fs_free_inode_bitmap(fs->inode_map);
+ retval = ext2fs_copy_bitmap(ctx->inode_used_map,
+ &fs->inode_map);
+ if (retval) {
+ clear_problem_context(&pctx);
+ fix_problem(ctx, PR_5_COPY_IBITMAP_ERROR, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT;
+ return;
+ }
+ ext2fs_set_bitmap_padding(fs->inode_map);
+ ext2fs_mark_ib_dirty(fs);
+
+ /* redo counts */
+ inodes = 0; free_inodes = 0; group_free = 0;
+ dirs_count = 0; group = 0;
+ memset(free_array, 0, fs->group_desc_count * sizeof(int));
+ memset(dir_array, 0, fs->group_desc_count * sizeof(int));
+ goto redo_counts;
+ } else if (fixit == 0)
+ ext2fs_unmark_valid(fs);
+
+ for (i = 0; i < fs->group_desc_count; i++) {
+ if (free_array[i] != fs->group_desc[i].bg_free_inodes_count) {
+ pctx.group = i;
+ pctx.ino = fs->group_desc[i].bg_free_inodes_count;
+ pctx.ino2 = free_array[i];
+ if (fix_problem(ctx, PR_5_FREE_INODE_COUNT_GROUP,
+ &pctx)) {
+ fs->group_desc[i].bg_free_inodes_count =
+ free_array[i];
+ ext2fs_mark_super_dirty(fs);
+ } else
+ ext2fs_unmark_valid(fs);
+ }
+ if (dir_array[i] != fs->group_desc[i].bg_used_dirs_count) {
+ pctx.group = i;
+ pctx.ino = fs->group_desc[i].bg_used_dirs_count;
+ pctx.ino2 = dir_array[i];
+
+ if (fix_problem(ctx, PR_5_FREE_DIR_COUNT_GROUP,
+ &pctx)) {
+ fs->group_desc[i].bg_used_dirs_count =
+ dir_array[i];
+ ext2fs_mark_super_dirty(fs);
+ } else
+ ext2fs_unmark_valid(fs);
+ }
+ }
+ if (free_inodes != fs->super->s_free_inodes_count) {
+ pctx.group = -1;
+ pctx.ino = fs->super->s_free_inodes_count;
+ pctx.ino2 = free_inodes;
+
+ if (fix_problem(ctx, PR_5_FREE_INODE_COUNT, &pctx)) {
+ fs->super->s_free_inodes_count = free_inodes;
+ ext2fs_mark_super_dirty(fs);
+ } else
+ ext2fs_unmark_valid(fs);
+ }
+ ext2fs_free_mem(&free_array);
+ ext2fs_free_mem(&dir_array);
+}
+
+static void check_inode_end(e2fsck_t ctx)
+{
+ ext2_filsys fs = ctx->fs;
+ ext2_ino_t end, save_inodes_count, i;
+ struct problem_context pctx;
+
+ clear_problem_context(&pctx);
+
+ end = EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count;
+ pctx.errcode = ext2fs_fudge_inode_bitmap_end(fs->inode_map, end,
+ &save_inodes_count);
+ if (pctx.errcode) {
+ pctx.num = 1;
+ fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT; /* fatal */
+ return;
+ }
+ if (save_inodes_count == end)
+ return;
+
+ for (i = save_inodes_count + 1; i <= end; i++) {
+ if (!ext2fs_test_inode_bitmap(fs->inode_map, i)) {
+ if (fix_problem(ctx, PR_5_INODE_BMAP_PADDING, &pctx)) {
+ for (i = save_inodes_count + 1; i <= end; i++)
+ ext2fs_mark_inode_bitmap(fs->inode_map,
+ i);
+ ext2fs_mark_ib_dirty(fs);
+ } else
+ ext2fs_unmark_valid(fs);
+ break;
+ }
+ }
+
+ pctx.errcode = ext2fs_fudge_inode_bitmap_end(fs->inode_map,
+ save_inodes_count, 0);
+ if (pctx.errcode) {
+ pctx.num = 2;
+ fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT; /* fatal */
+ return;
+ }
+}
+
+static void check_block_end(e2fsck_t ctx)
+{
+ ext2_filsys fs = ctx->fs;
+ blk_t end, save_blocks_count, i;
+ struct problem_context pctx;
+
+ clear_problem_context(&pctx);
+
+ end = fs->block_map->start +
+ (EXT2_BLOCKS_PER_GROUP(fs->super) * fs->group_desc_count) - 1;
+ pctx.errcode = ext2fs_fudge_block_bitmap_end(fs->block_map, end,
+ &save_blocks_count);
+ if (pctx.errcode) {
+ pctx.num = 3;
+ fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT; /* fatal */
+ return;
+ }
+ if (save_blocks_count == end)
+ return;
+
+ for (i = save_blocks_count + 1; i <= end; i++) {
+ if (!ext2fs_test_block_bitmap(fs->block_map, i)) {
+ if (fix_problem(ctx, PR_5_BLOCK_BMAP_PADDING, &pctx)) {
+ for (i = save_blocks_count + 1; i <= end; i++)
+ ext2fs_mark_block_bitmap(fs->block_map,
+ i);
+ ext2fs_mark_bb_dirty(fs);
+ } else
+ ext2fs_unmark_valid(fs);
+ break;
+ }
+ }
+
+ pctx.errcode = ext2fs_fudge_block_bitmap_end(fs->block_map,
+ save_blocks_count, 0);
+ if (pctx.errcode) {
+ pctx.num = 4;
+ fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx);
+ ctx->flags |= E2F_FLAG_ABORT; /* fatal */
+ return;
+ }
+}
+
+
+