blob: 56619c3aeb1c101c85c0218c65aa6c43ef5f6bc2 [file] [log] [blame]
/*
* 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, super;
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;
int lazy_bg = 0;
int skip_group = 0;
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 */
goto errout;
}
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 */
goto errout;
}
if (EXT2_HAS_COMPAT_FEATURE(fs->super, EXT2_FEATURE_COMPAT_LAZY_BG))
lazy_bg++;
redo_counts:
had_problem = 0;
save_problem = 0;
pctx.blk = pctx.blk2 = NO_BLK;
if (lazy_bg && (fs->group_desc[group].bg_flags &
EXT2_BG_BLOCK_UNINIT))
skip_group++;
super = fs->super->s_first_data_block;
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);
if (skip_group) {
if ((i >= super) &&
(i <= super + fs->desc_blocks) &&
ext2fs_bg_has_super(fs, group))
bitmap = 1;
else if (i == fs->group_desc[group].bg_block_bitmap)
bitmap = 1;
else if (i == fs->group_desc[group].bg_inode_bitmap)
bitmap = 1;
else if (i >= fs->group_desc[group].bg_inode_table &&
(i < fs->group_desc[group].bg_inode_table
+ fs->inode_blocks_per_group))
bitmap = 1;
else
bitmap = 0;
actual = (actual != 0);
} else
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 && !skip_group) {
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;
skip_group = 0;
super += fs->super->s_blocks_per_group;
if (ctx->progress)
if ((ctx->progress)(ctx, 5, group,
fs->group_desc_count*2))
goto errout;
if (lazy_bg &&
(i != fs->super->s_blocks_count-1) &&
(fs->group_desc[group].bg_flags &
EXT2_BG_BLOCK_UNINIT))
skip_group++;
}
}
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;
goto errout;
}
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);
}
errout:
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;
int lazy_bg = 0;
int skip_group = 0;
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 */
goto errout;
}
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 */
goto errout;
}
if (EXT2_HAS_COMPAT_FEATURE(fs->super,
EXT2_FEATURE_COMPAT_LAZY_BG))
lazy_bg++;
redo_counts:
had_problem = 0;
save_problem = 0;
pctx.ino = pctx.ino2 = 0;
if (lazy_bg && (fs->group_desc[group].bg_flags &
EXT2_BG_INODE_UNINIT))
skip_group++;
/* Protect loop from wrap-around if inodes_count is maxed */
for (i = 1; i <= fs->super->s_inodes_count && i > 0; i++) {
actual = ext2fs_fast_test_inode_bitmap(ctx->inode_used_map, i);
if (skip_group)
bitmap = 0;
else
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) {
if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, i))
dirs_count++;
} else if (!skip_group) {
group_free++;
free_inodes++;
}
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;
skip_group = 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))
goto errout;
if (lazy_bg &&
(i != fs->super->s_inodes_count) &&
(fs->group_desc[group].bg_flags &
EXT2_BG_INODE_UNINIT))
skip_group++;
}
}
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;
goto errout;
}
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);
}
errout:
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;
/* protect loop from wrap-around if end is maxed */
for (i = save_inodes_count + 1; i <= end && i > save_inodes_count; 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;
/* Protect loop from wrap-around if end is maxed */
for (i = save_blocks_count + 1; i <= end && i > save_blocks_count; 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;
}
}