On Mon, Oct 31, 2005 at 11:46:58PM -0500, Theodore Ts'o wrote:
> On Mon, Oct 31, 2005 at 02:25:03PM -0700, Andreas Dilger wrote:
> > On Oct 31, 2005 01:13 +0100, Adrian Bunk wrote:
> > > Can anyone tell me the history of CONFIG_EXT{2,3}_CHECK?
> > >
> > > There is code for a "check" option for mount if these options are
> > > enabled, but there's no way to enable them.
> >
> > These are expensive debugging options, which walk the inode/block bitmaps
> > for getting the group inode/block usage instead of using the group
> > summary data. Not used very often but I suspect occasionally useful for
> > developers mucking with ext[23] internals. Since it is developer-only
> > code it needs to be enabled with #define CONFIG_EXT[23]_CHECK in a
> > header or compile option.
>
> It's basically a stripped down version of e2fsck pass #5, though. Is
> there any reason why this needs to be in the kernel? If it would be
> useful I could easily make a userspace implementation of these checks.
This code was introduced with kernel 2.4, but as far as I can see there
was never an option for enabling it.
Unless someone can give a strong reason for keeping it, I'd suggest the
patch below.
> - Ted
cu
Adrian
<-- snip -->
The CONFIG_EXT{2,3}_CHECK options where were never available, and all
they did was to implement a subset of e2fsck in the kernel.
Signed-off-by: Adrian Bunk <bunk@xxxxxxxxx>
---
Documentation/filesystems/ext2.txt | 2
fs/ext2/balloc.c | 73 -----------------------------
fs/ext2/ialloc.c | 40 ---------------
fs/ext2/super.c | 16 ------
fs/ext3/balloc.c | 73 -----------------------------
fs/ext3/ialloc.c | 41 ----------------
fs/ext3/super.c | 17 ------
7 files changed, 2 insertions(+), 260 deletions(-)
--- linux-2.6.14-mm1-full/Documentation/filesystems/ext2.txt.old 2005-11-07 21:22:25.000000000 +0100
+++ linux-2.6.14-mm1-full/Documentation/filesystems/ext2.txt 2005-11-07 21:22:36.000000000 +0100
@@ -17,8 +17,6 @@
bsddf (*) Makes `df' act like BSD.
minixdf Makes `df' act like Minix.
-check Check block and inode bitmaps at mount time
- (requires CONFIG_EXT2_CHECK).
check=none, nocheck (*) Don't do extra checking of bitmaps on mount
(check=normal and check=strict options removed)
--- linux-2.6.14-mm1-full/fs/ext2/balloc.c.old 2005-11-07 21:22:43.000000000 +0100
+++ linux-2.6.14-mm1-full/fs/ext2/balloc.c 2005-11-07 21:22:56.000000000 +0100
@@ -624,76 +624,3 @@
return EXT2_SB(sb)->s_gdb_count;
}
-#ifdef CONFIG_EXT2_CHECK
-/* Called at mount-time, super-block is locked */
-void ext2_check_blocks_bitmap (struct super_block * sb)
-{
- struct buffer_head *bitmap_bh = NULL;
- struct ext2_super_block * es;
- unsigned long desc_count, bitmap_count, x, j;
- unsigned long desc_blocks;
- struct ext2_group_desc * desc;
- int i;
-
- es = EXT2_SB(sb)->s_es;
- desc_count = 0;
- bitmap_count = 0;
- desc = NULL;
- for (i = 0; i < EXT2_SB(sb)->s_groups_count; i++) {
- desc = ext2_get_group_desc (sb, i, NULL);
- if (!desc)
- continue;
- desc_count += le16_to_cpu(desc->bg_free_blocks_count);
- brelse(bitmap_bh);
- bitmap_bh = read_block_bitmap(sb, i);
- if (!bitmap_bh)
- continue;
-
- if (ext2_bg_has_super(sb, i) &&
- !ext2_test_bit(0, bitmap_bh->b_data))
- ext2_error(sb, __FUNCTION__,
- "Superblock in group %d is marked free", i);
-
- desc_blocks = ext2_bg_num_gdb(sb, i);
- for (j = 0; j < desc_blocks; j++)
- if (!ext2_test_bit(j + 1, bitmap_bh->b_data))
- ext2_error(sb, __FUNCTION__,
- "Descriptor block #%ld in group "
- "%d is marked free", j, i);
-
- if (!block_in_use(le32_to_cpu(desc->bg_block_bitmap),
- sb, bitmap_bh->b_data))
- ext2_error(sb, "ext2_check_blocks_bitmap",
- "Block bitmap for group %d is marked free",
- i);
-
- if (!block_in_use(le32_to_cpu(desc->bg_inode_bitmap),
- sb, bitmap_bh->b_data))
- ext2_error(sb, "ext2_check_blocks_bitmap",
- "Inode bitmap for group %d is marked free",
- i);
-
- for (j = 0; j < EXT2_SB(sb)->s_itb_per_group; j++)
- if (!block_in_use(le32_to_cpu(desc->bg_inode_table) + j,
- sb, bitmap_bh->b_data))
- ext2_error (sb, "ext2_check_blocks_bitmap",
- "Block #%ld of the inode table in "
- "group %d is marked free", j, i);
-
- x = ext2_count_free(bitmap_bh, sb->s_blocksize);
- if (le16_to_cpu(desc->bg_free_blocks_count) != x)
- ext2_error (sb, "ext2_check_blocks_bitmap",
- "Wrong free blocks count for group %d, "
- "stored = %d, counted = %lu", i,
- le16_to_cpu(desc->bg_free_blocks_count), x);
- bitmap_count += x;
- }
- if (le32_to_cpu(es->s_free_blocks_count) != bitmap_count)
- ext2_error (sb, "ext2_check_blocks_bitmap",
- "Wrong free blocks count in super block, "
- "stored = %lu, counted = %lu",
- (unsigned long)le32_to_cpu(es->s_free_blocks_count),
- bitmap_count);
- brelse(bitmap_bh);
-}
-#endif
--- linux-2.6.14-mm1-full/fs/ext2/ialloc.c.old 2005-11-07 21:23:04.000000000 +0100
+++ linux-2.6.14-mm1-full/fs/ext2/ialloc.c 2005-11-07 21:23:13.000000000 +0100
@@ -700,43 +700,3 @@
return count;
}
-#ifdef CONFIG_EXT2_CHECK
-/* Called at mount-time, super-block is locked */
-void ext2_check_inodes_bitmap (struct super_block * sb)
-{
- struct ext2_super_block * es = EXT2_SB(sb)->s_es;
- unsigned long desc_count = 0, bitmap_count = 0;
- struct buffer_head *bitmap_bh = NULL;
- int i;
-
- for (i = 0; i < EXT2_SB(sb)->s_groups_count; i++) {
- struct ext2_group_desc *desc;
- unsigned x;
-
- desc = ext2_get_group_desc(sb, i, NULL);
- if (!desc)
- continue;
- desc_count += le16_to_cpu(desc->bg_free_inodes_count);
- brelse(bitmap_bh);
- bitmap_bh = read_inode_bitmap(sb, i);
- if (!bitmap_bh)
- continue;
-
- x = ext2_count_free(bitmap_bh, EXT2_INODES_PER_GROUP(sb) / 8);
- if (le16_to_cpu(desc->bg_free_inodes_count) != x)
- ext2_error (sb, "ext2_check_inodes_bitmap",
- "Wrong free inodes count in group %d, "
- "stored = %d, counted = %lu", i,
- le16_to_cpu(desc->bg_free_inodes_count), x);
- bitmap_count += x;
- }
- brelse(bitmap_bh);
- if (percpu_counter_read(&EXT2_SB(sb)->s_freeinodes_counter) !=
- bitmap_count)
- ext2_error(sb, "ext2_check_inodes_bitmap",
- "Wrong free inodes count in super block, "
- "stored = %lu, counted = %lu",
- (unsigned long)le32_to_cpu(es->s_free_inodes_count),
- bitmap_count);
-}
-#endif
--- linux-2.6.14-mm1-full/fs/ext2/super.c.old 2005-11-07 21:23:21.000000000 +0100
+++ linux-2.6.14-mm1-full/fs/ext2/super.c 2005-11-07 21:23:56.000000000 +0100
@@ -281,7 +281,7 @@
enum {
Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic,
- Opt_err_ro, Opt_nouid32, Opt_check, Opt_nocheck, Opt_debug,
+ Opt_err_ro, Opt_nouid32, Opt_nocheck, Opt_debug,
Opt_oldalloc, Opt_orlov, Opt_nobh, Opt_user_xattr, Opt_nouser_xattr,
Opt_acl, Opt_noacl, Opt_xip, Opt_ignore, Opt_err, Opt_quota,
Opt_usrquota, Opt_grpquota
@@ -303,7 +303,6 @@
{Opt_nouid32, "nouid32"},
{Opt_nocheck, "check=none"},
{Opt_nocheck, "nocheck"},
- {Opt_check, "check"},
{Opt_debug, "debug"},
{Opt_oldalloc, "oldalloc"},
{Opt_orlov, "orlov"},
@@ -376,13 +375,6 @@
case Opt_nouid32:
set_opt (sbi->s_mount_opt, NO_UID32);
break;
- case Opt_check:
-#ifdef CONFIG_EXT2_CHECK
- set_opt (sbi->s_mount_opt, CHECK);
-#else
- printk("EXT2 Check option not supported\n");
-#endif
- break;
case Opt_nocheck:
clear_opt (sbi->s_mount_opt, CHECK);
break;
@@ -503,12 +495,6 @@
EXT2_BLOCKS_PER_GROUP(sb),
EXT2_INODES_PER_GROUP(sb),
sbi->s_mount_opt);
-#ifdef CONFIG_EXT2_CHECK
- if (test_opt (sb, CHECK)) {
- ext2_check_blocks_bitmap (sb);
- ext2_check_inodes_bitmap (sb);
- }
-#endif
return res;
}
--- linux-2.6.14-mm1-full/fs/ext3/balloc.c.old 2005-11-07 21:24:04.000000000 +0100
+++ linux-2.6.14-mm1-full/fs/ext3/balloc.c 2005-11-07 21:26:53.000000000 +0100
@@ -1517,76 +1517,3 @@
return EXT3_SB(sb)->s_gdb_count;
}
-#ifdef CONFIG_EXT3_CHECK
-/* Called at mount-time, super-block is locked */
-void ext3_check_blocks_bitmap (struct super_block * sb)
-{
- struct ext3_super_block *es;
- unsigned long desc_count, bitmap_count, x, j;
- unsigned long desc_blocks;
- struct buffer_head *bitmap_bh = NULL;
- struct ext3_group_desc *gdp;
- int i;
-
- es = EXT3_SB(sb)->s_es;
- desc_count = 0;
- bitmap_count = 0;
- gdp = NULL;
- for (i = 0; i < EXT3_SB(sb)->s_groups_count; i++) {
- gdp = ext3_get_group_desc (sb, i, NULL);
- if (!gdp)
- continue;
- desc_count += le16_to_cpu(gdp->bg_free_blocks_count);
- brelse(bitmap_bh);
- bitmap_bh = read_block_bitmap(sb, i);
- if (bitmap_bh == NULL)
- continue;
-
- if (ext3_bg_has_super(sb, i) &&
- !ext3_test_bit(0, bitmap_bh->b_data))
- ext3_error(sb, __FUNCTION__,
- "Superblock in group %d is marked free", i);
-
- desc_blocks = ext3_bg_num_gdb(sb, i);
- for (j = 0; j < desc_blocks; j++)
- if (!ext3_test_bit(j + 1, bitmap_bh->b_data))
- ext3_error(sb, __FUNCTION__,
- "Descriptor block #%ld in group "
- "%d is marked free", j, i);
-
- if (!block_in_use (le32_to_cpu(gdp->bg_block_bitmap),
- sb, bitmap_bh->b_data))
- ext3_error (sb, "ext3_check_blocks_bitmap",
- "Block bitmap for group %d is marked free",
- i);
-
- if (!block_in_use (le32_to_cpu(gdp->bg_inode_bitmap),
- sb, bitmap_bh->b_data))
- ext3_error (sb, "ext3_check_blocks_bitmap",
- "Inode bitmap for group %d is marked free",
- i);
-
- for (j = 0; j < EXT3_SB(sb)->s_itb_per_group; j++)
- if (!block_in_use (le32_to_cpu(gdp->bg_inode_table) + j,
- sb, bitmap_bh->b_data))
- ext3_error (sb, "ext3_check_blocks_bitmap",
- "Block #%d of the inode table in "
- "group %d is marked free", j, i);
-
- x = ext3_count_free(bitmap_bh, sb->s_blocksize);
- if (le16_to_cpu(gdp->bg_free_blocks_count) != x)
- ext3_error (sb, "ext3_check_blocks_bitmap",
- "Wrong free blocks count for group %d, "
- "stored = %d, counted = %lu", i,
- le16_to_cpu(gdp->bg_free_blocks_count), x);
- bitmap_count += x;
- }
- brelse(bitmap_bh);
- if (le32_to_cpu(es->s_free_blocks_count) != bitmap_count)
- ext3_error (sb, "ext3_check_blocks_bitmap",
- "Wrong free blocks count in super block, "
- "stored = %lu, counted = %lu",
- (unsigned long)le32_to_cpu(es->s_free_blocks_count),
- bitmap_count);
-}
-#endif
--- linux-2.6.14-mm1-full/fs/ext3/ialloc.c.old 2005-11-07 21:27:02.000000000 +0100
+++ linux-2.6.14-mm1-full/fs/ext3/ialloc.c 2005-11-07 21:27:09.000000000 +0100
@@ -756,44 +756,3 @@
return count;
}
-#ifdef CONFIG_EXT3_CHECK
-/* Called at mount-time, super-block is locked */
-void ext3_check_inodes_bitmap (struct super_block * sb)
-{
- struct ext3_super_block * es;
- unsigned long desc_count, bitmap_count, x;
- struct buffer_head *bitmap_bh = NULL;
- struct ext3_group_desc * gdp;
- int i;
-
- es = EXT3_SB(sb)->s_es;
- desc_count = 0;
- bitmap_count = 0;
- gdp = NULL;
- for (i = 0; i < EXT3_SB(sb)->s_groups_count; i++) {
- gdp = ext3_get_group_desc (sb, i, NULL);
- if (!gdp)
- continue;
- desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
- brelse(bitmap_bh);
- bitmap_bh = read_inode_bitmap(sb, i);
- if (!bitmap_bh)
- continue;
-
- x = ext3_count_free(bitmap_bh, EXT3_INODES_PER_GROUP(sb) / 8);
- if (le16_to_cpu(gdp->bg_free_inodes_count) != x)
- ext3_error (sb, "ext3_check_inodes_bitmap",
- "Wrong free inodes count in group %d, "
- "stored = %d, counted = %lu", i,
- le16_to_cpu(gdp->bg_free_inodes_count), x);
- bitmap_count += x;
- }
- brelse(bitmap_bh);
- if (le32_to_cpu(es->s_free_inodes_count) != bitmap_count)
- ext3_error (sb, "ext3_check_inodes_bitmap",
- "Wrong free inodes count in super block, "
- "stored = %lu, counted = %lu",
- (unsigned long)le32_to_cpu(es->s_free_inodes_count),
- bitmap_count);
-}
-#endif
--- linux-2.6.14-mm1-full/fs/ext3/super.c.old 2005-11-07 21:27:17.000000000 +0100
+++ linux-2.6.14-mm1-full/fs/ext3/super.c 2005-11-07 21:27:48.000000000 +0100
@@ -625,7 +625,7 @@
enum {
Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
- Opt_nouid32, Opt_check, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
+ Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh,
Opt_commit, Opt_journal_update, Opt_journal_inum,
@@ -652,7 +652,6 @@
{Opt_nouid32, "nouid32"},
{Opt_nocheck, "nocheck"},
{Opt_nocheck, "check=none"},
- {Opt_check, "check"},
{Opt_debug, "debug"},
{Opt_oldalloc, "oldalloc"},
{Opt_orlov, "orlov"},
@@ -773,14 +772,6 @@
case Opt_nouid32:
set_opt (sbi->s_mount_opt, NO_UID32);
break;
- case Opt_check:
-#ifdef CONFIG_EXT3_CHECK
- set_opt (sbi->s_mount_opt, CHECK);
-#else
- printk(KERN_ERR
- "EXT3 Check option not supported\n");
-#endif
- break;
case Opt_nocheck:
clear_opt (sbi->s_mount_opt, CHECK);
break;
@@ -1115,12 +1106,6 @@
} else {
printk("internal journal\n");
}
-#ifdef CONFIG_EXT3_CHECK
- if (test_opt (sb, CHECK)) {
- ext3_check_blocks_bitmap (sb);
- ext3_check_inodes_bitmap (sb);
- }
-#endif
return res;
}
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