[PATCH 1/2] ext3: init statistics after journal recovery

[PATCH 1/2] ext3: init statistics after journal recovery

[Dmitry Monakhov]

Currently block/inode/dir counters initialized before journal was
recovered. In fact after journal recovery this info will probably
change. And freeblocks it critical for correct delalloc mode
accounting.
BUG:#15768

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
---
 fs/ext3/super.c |   38 ++++++++++++++++++--------------------
 1 files changed, 18 insertions(+), 20 deletions(-)

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index e844acc..613b5ed 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1890,21 +1890,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	spin_lock_init(&sbi->s_next_gen_lock);
 
-	err = percpu_counter_init(&sbi->s_freeblocks_counter,
-			ext3_count_free_blocks(sb));
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_freeinodes_counter,
-				ext3_count_free_inodes(sb));
-	}
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_dirs_counter,
-				ext3_count_dirs(sb));
-	}
-	if (err) {
-		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
-		goto failed_mount3;
-	}
-
 	/* per fileystem reservation list head & lock */
 	spin_lock_init(&sbi->s_rsv_window_lock);
 	sbi->s_rsv_window_root = RB_ROOT;
@@ -1945,16 +1930,30 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	if (!test_opt(sb, NOLOAD) &&
 	    EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
 		if (ext3_load_journal(sb, es, journal_devnum))
-			goto failed_mount3;
+			goto failed_mount2;
 	} else if (journal_inum) {
 		if (ext3_create_journal(sb, es, journal_inum))
-			goto failed_mount3;
+			goto failed_mount2;
 	} else {
 		if (!silent)
 			ext3_msg(sb, KERN_ERR,
 				"error: no journal found. "
 				"mounting ext3 over ext2?");
-		goto failed_mount3;
+		goto failed_mount2;
+	}
+	err = percpu_counter_init(&sbi->s_freeblocks_counter,
+			ext3_count_free_blocks(sb));
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_freeinodes_counter,
+				ext3_count_free_inodes(sb));
+	}
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_dirs_counter,
+				ext3_count_dirs(sb));
+	}
+	if (err) {
+		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
+		goto failed_mount4;
 	}
 
 	/* We have now updated the journal if required, so we can
@@ -2040,11 +2039,10 @@ cantfind_ext3:
 	goto failed_mount;
 
 failed_mount4:
-	journal_destroy(sbi->s_journal);
-failed_mount3:
 	percpu_counter_destroy(&sbi->s_freeblocks_counter);
 	percpu_counter_destroy(&sbi->s_freeinodes_counter);
 	percpu_counter_destroy(&sbi->s_dirs_counter);
+	journal_destroy(sbi->s_journal);
 failed_mount2:
 	for (i = 0; i < db_count; i++)
 		brelse(sbi->s_group_desc[i]);
-- 
1.6.6.1

[PATCH 2/2] ext4: init statistics after journal recovery v2

[Dmitry Monakhov]

Currently block/inode/dir counters initialized before journal was
recovered. In fact after journal recovery this info will probably
change. And freeblocks it critical for correct delalloc mode
accounting.
BUG:#15768

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
---
 fs/ext4/super.c |   44 ++++++++++++++++++++++----------------------
 1 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 29c6875..04a30ef 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2793,24 +2793,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	spin_lock_init(&sbi->s_next_gen_lock);
 
-	err = percpu_counter_init(&sbi->s_freeblocks_counter,
-			ext4_count_free_blocks(sb));
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_freeinodes_counter,
-				ext4_count_free_inodes(sb));
-	}
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_dirs_counter,
-				ext4_count_dirs(sb));
-	}
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
-	}
-	if (err) {
-		ext4_msg(sb, KERN_ERR, "insufficient memory");
-		goto failed_mount3;
-	}
-
 	sbi->s_stripe = ext4_get_stripe_size(sbi);
 	sbi->s_max_writeback_mb_bump = 128;
 
@@ -2910,6 +2892,24 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	set_task_ioprio(sbi->s_journal->j_task, journal_ioprio);
 
 no_journal:
+	err = percpu_counter_init(&sbi->s_freeblocks_counter,
+			ext4_count_free_blocks(sb));
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_freeinodes_counter,
+				ext4_count_free_inodes(sb));
+	}
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_dirs_counter,
+				ext4_count_dirs(sb));
+	}
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
+	}
+	if (err) {
+		ext4_msg(sb, KERN_ERR, "insufficient memory");
+		goto failed_mount_wq;
+	}
+
 	if (test_opt(sb, NOBH)) {
 		if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) {
 			ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - "
@@ -3059,6 +3059,10 @@ failed_mount_wq:
 		jbd2_journal_destroy(sbi->s_journal);
 		sbi->s_journal = NULL;
 	}
+	percpu_counter_destroy(&sbi->s_freeblocks_counter);
+	percpu_counter_destroy(&sbi->s_freeinodes_counter);
+	percpu_counter_destroy(&sbi->s_dirs_counter);
+	percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
 failed_mount3:
 	if (sbi->s_flex_groups) {
 		if (is_vmalloc_addr(sbi->s_flex_groups))
@@ -3066,10 +3070,6 @@ failed_mount3:
 		else
 			kfree(sbi->s_flex_groups);
 	}
-	percpu_counter_destroy(&sbi->s_freeblocks_counter);
-	percpu_counter_destroy(&sbi->s_freeinodes_counter);
-	percpu_counter_destroy(&sbi->s_dirs_counter);
-	percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
 failed_mount2:
 	for (i = 0; i < db_count; i++)
 		brelse(sbi->s_group_desc[i]);
-- 
1.6.6.1

Re: [PATCH 1/2] ext3: init statistics after journal recovery

[Jan Kara]

On Mon 12-04-10 23:12:55, Dmitry Monakhov wrote:
> Currently block/inode/dir counters initialized before journal was
> recovered. In fact after journal recovery this info will probably
> change. And freeblocks it critical for correct delalloc mode
> accounting.
> BUG:#15768
  Thanks for the patch. Could you please also rename failed_mount4
to failed_mount3 so that the label numbering is continguous? Otherwise
the patch is fine.

								Honza
> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
> ---
>  fs/ext3/super.c |   38 ++++++++++++++++++--------------------
>  1 files changed, 18 insertions(+), 20 deletions(-)
> 
> diff --git a/fs/ext3/super.c b/fs/ext3/super.c
> index e844acc..613b5ed 100644
> --- a/fs/ext3/super.c
> +++ b/fs/ext3/super.c
> @@ -1890,21 +1890,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>  	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
>  	spin_lock_init(&sbi->s_next_gen_lock);
>  
> -	err = percpu_counter_init(&sbi->s_freeblocks_counter,
> -			ext3_count_free_blocks(sb));
> -	if (!err) {
> -		err = percpu_counter_init(&sbi->s_freeinodes_counter,
> -				ext3_count_free_inodes(sb));
> -	}
> -	if (!err) {
> -		err = percpu_counter_init(&sbi->s_dirs_counter,
> -				ext3_count_dirs(sb));
> -	}
> -	if (err) {
> -		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
> -		goto failed_mount3;
> -	}
> -
>  	/* per fileystem reservation list head & lock */
>  	spin_lock_init(&sbi->s_rsv_window_lock);
>  	sbi->s_rsv_window_root = RB_ROOT;
> @@ -1945,16 +1930,30 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>  	if (!test_opt(sb, NOLOAD) &&
>  	    EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
>  		if (ext3_load_journal(sb, es, journal_devnum))
> -			goto failed_mount3;
> +			goto failed_mount2;
>  	} else if (journal_inum) {
>  		if (ext3_create_journal(sb, es, journal_inum))
> -			goto failed_mount3;
> +			goto failed_mount2;
>  	} else {
>  		if (!silent)
>  			ext3_msg(sb, KERN_ERR,
>  				"error: no journal found. "
>  				"mounting ext3 over ext2?");
> -		goto failed_mount3;
> +		goto failed_mount2;
> +	}
> +	err = percpu_counter_init(&sbi->s_freeblocks_counter,
> +			ext3_count_free_blocks(sb));
> +	if (!err) {
> +		err = percpu_counter_init(&sbi->s_freeinodes_counter,
> +				ext3_count_free_inodes(sb));
> +	}
> +	if (!err) {
> +		err = percpu_counter_init(&sbi->s_dirs_counter,
> +				ext3_count_dirs(sb));
> +	}
> +	if (err) {
> +		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
> +		goto failed_mount4;
>  	}
>  
>  	/* We have now updated the journal if required, so we can
> @@ -2040,11 +2039,10 @@ cantfind_ext3:
>  	goto failed_mount;
>  
>  failed_mount4:
> -	journal_destroy(sbi->s_journal);
> -failed_mount3:
>  	percpu_counter_destroy(&sbi->s_freeblocks_counter);
>  	percpu_counter_destroy(&sbi->s_freeinodes_counter);
>  	percpu_counter_destroy(&sbi->s_dirs_counter);
> +	journal_destroy(sbi->s_journal);
>  failed_mount2:
>  	for (i = 0; i < db_count; i++)
>  		brelse(sbi->s_group_desc[i]);
> -- 
> 1.6.6.1
> 
-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR

Re: [PATCH 1/2] ext3: init statistics after journal recovery

[Dmitry Monakhov]

Jan Kara <jack@suse.cz> writes:

> On Mon 12-04-10 23:12:55, Dmitry Monakhov wrote:
>> Currently block/inode/dir counters initialized before journal was
>> recovered. In fact after journal recovery this info will probably
>> change. And freeblocks it critical for correct delalloc mode
>> accounting.
>> BUG:#15768
>   Thanks for the patch. Could you please also rename failed_mount4
> to failed_mount3 so that the label numbering is continguous? Otherwise
> the patch is fine.
Ok, in a minute.
> 								Honza
>> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
>> ---
>>  fs/ext3/super.c |   38 ++++++++++++++++++--------------------
>>  1 files changed, 18 insertions(+), 20 deletions(-)
>> 
>> diff --git a/fs/ext3/super.c b/fs/ext3/super.c
>> index e844acc..613b5ed 100644
>> --- a/fs/ext3/super.c
>> +++ b/fs/ext3/super.c
>> @@ -1890,21 +1890,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>>  	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
>>  	spin_lock_init(&sbi->s_next_gen_lock);
>>  
>> -	err = percpu_counter_init(&sbi->s_freeblocks_counter,
>> -			ext3_count_free_blocks(sb));
>> -	if (!err) {
>> -		err = percpu_counter_init(&sbi->s_freeinodes_counter,
>> -				ext3_count_free_inodes(sb));
>> -	}
>> -	if (!err) {
>> -		err = percpu_counter_init(&sbi->s_dirs_counter,
>> -				ext3_count_dirs(sb));
>> -	}
>> -	if (err) {
>> -		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
>> -		goto failed_mount3;
>> -	}
>> -
>>  	/* per fileystem reservation list head & lock */
>>  	spin_lock_init(&sbi->s_rsv_window_lock);
>>  	sbi->s_rsv_window_root = RB_ROOT;
>> @@ -1945,16 +1930,30 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>>  	if (!test_opt(sb, NOLOAD) &&
>>  	    EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
>>  		if (ext3_load_journal(sb, es, journal_devnum))
>> -			goto failed_mount3;
>> +			goto failed_mount2;
>>  	} else if (journal_inum) {
>>  		if (ext3_create_journal(sb, es, journal_inum))
>> -			goto failed_mount3;
>> +			goto failed_mount2;
>>  	} else {
>>  		if (!silent)
>>  			ext3_msg(sb, KERN_ERR,
>>  				"error: no journal found. "
>>  				"mounting ext3 over ext2?");
>> -		goto failed_mount3;
>> +		goto failed_mount2;
>> +	}
>> +	err = percpu_counter_init(&sbi->s_freeblocks_counter,
>> +			ext3_count_free_blocks(sb));
>> +	if (!err) {
>> +		err = percpu_counter_init(&sbi->s_freeinodes_counter,
>> +				ext3_count_free_inodes(sb));
>> +	}
>> +	if (!err) {
>> +		err = percpu_counter_init(&sbi->s_dirs_counter,
>> +				ext3_count_dirs(sb));
>> +	}
>> +	if (err) {
>> +		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
>> +		goto failed_mount4;
>>  	}
>>  
>>  	/* We have now updated the journal if required, so we can
>> @@ -2040,11 +2039,10 @@ cantfind_ext3:
>>  	goto failed_mount;
>>  
>>  failed_mount4:
>> -	journal_destroy(sbi->s_journal);
>> -failed_mount3:
>>  	percpu_counter_destroy(&sbi->s_freeblocks_counter);
>>  	percpu_counter_destroy(&sbi->s_freeinodes_counter);
>>  	percpu_counter_destroy(&sbi->s_dirs_counter);
>> +	journal_destroy(sbi->s_journal);
>>  failed_mount2:
>>  	for (i = 0; i < db_count; i++)
>>  		brelse(sbi->s_group_desc[i]);
>> -- 
>> 1.6.6.1
>> 

Re: [PATCH 2/2] ext4: init statistics after journal recovery v2

[Jan Kara]

On Mon 12-04-10 23:12:56, Dmitry Monakhov wrote:
> Currently block/inode/dir counters initialized before journal was
> recovered. In fact after journal recovery this info will probably
> change. And freeblocks it critical for correct delalloc mode
> accounting.
> BUG:#15768
  This patch looks fine. Acked-by: Jan Kara <jack@suse.cz>

								Honza
> 
> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
> ---
>  fs/ext4/super.c |   44 ++++++++++++++++++++++----------------------
>  1 files changed, 22 insertions(+), 22 deletions(-)
> 
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 29c6875..04a30ef 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -2793,24 +2793,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>  	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
>  	spin_lock_init(&sbi->s_next_gen_lock);
>  
> -	err = percpu_counter_init(&sbi->s_freeblocks_counter,
> -			ext4_count_free_blocks(sb));
> -	if (!err) {
> -		err = percpu_counter_init(&sbi->s_freeinodes_counter,
> -				ext4_count_free_inodes(sb));
> -	}
> -	if (!err) {
> -		err = percpu_counter_init(&sbi->s_dirs_counter,
> -				ext4_count_dirs(sb));
> -	}
> -	if (!err) {
> -		err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
> -	}
> -	if (err) {
> -		ext4_msg(sb, KERN_ERR, "insufficient memory");
> -		goto failed_mount3;
> -	}
> -
>  	sbi->s_stripe = ext4_get_stripe_size(sbi);
>  	sbi->s_max_writeback_mb_bump = 128;
>  
> @@ -2910,6 +2892,24 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>  	set_task_ioprio(sbi->s_journal->j_task, journal_ioprio);
>  
>  no_journal:
> +	err = percpu_counter_init(&sbi->s_freeblocks_counter,
> +			ext4_count_free_blocks(sb));
> +	if (!err) {
> +		err = percpu_counter_init(&sbi->s_freeinodes_counter,
> +				ext4_count_free_inodes(sb));
> +	}
> +	if (!err) {
> +		err = percpu_counter_init(&sbi->s_dirs_counter,
> +				ext4_count_dirs(sb));
> +	}
> +	if (!err) {
> +		err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
> +	}
> +	if (err) {
> +		ext4_msg(sb, KERN_ERR, "insufficient memory");
> +		goto failed_mount_wq;
> +	}
> +
>  	if (test_opt(sb, NOBH)) {
>  		if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) {
>  			ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - "
> @@ -3059,6 +3059,10 @@ failed_mount_wq:
>  		jbd2_journal_destroy(sbi->s_journal);
>  		sbi->s_journal = NULL;
>  	}
> +	percpu_counter_destroy(&sbi->s_freeblocks_counter);
> +	percpu_counter_destroy(&sbi->s_freeinodes_counter);
> +	percpu_counter_destroy(&sbi->s_dirs_counter);
> +	percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
>  failed_mount3:
>  	if (sbi->s_flex_groups) {
>  		if (is_vmalloc_addr(sbi->s_flex_groups))
> @@ -3066,10 +3070,6 @@ failed_mount3:
>  		else
>  			kfree(sbi->s_flex_groups);
>  	}
> -	percpu_counter_destroy(&sbi->s_freeblocks_counter);
> -	percpu_counter_destroy(&sbi->s_freeinodes_counter);
> -	percpu_counter_destroy(&sbi->s_dirs_counter);
> -	percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
>  failed_mount2:
>  	for (i = 0; i < db_count; i++)
>  		brelse(sbi->s_group_desc[i]);
> -- 
> 1.6.6.1
> 
-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR

[PATCH 1/2] ext3: init statistics after journal recovery v2

[Dmitry Monakhov]

Currently block/inode/dir counters initialized before journal was
recovered. In fact after journal recovery this info will probably
change which result in incorrect statfs()
BUG:#15768

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
---
 fs/ext3/super.c |   44 +++++++++++++++++++++-----------------------
 1 files changed, 21 insertions(+), 23 deletions(-)

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index e844acc..436e0dc 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1890,21 +1890,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	spin_lock_init(&sbi->s_next_gen_lock);
 
-	err = percpu_counter_init(&sbi->s_freeblocks_counter,
-			ext3_count_free_blocks(sb));
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_freeinodes_counter,
-				ext3_count_free_inodes(sb));
-	}
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_dirs_counter,
-				ext3_count_dirs(sb));
-	}
-	if (err) {
-		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
-		goto failed_mount3;
-	}
-
 	/* per fileystem reservation list head & lock */
 	spin_lock_init(&sbi->s_rsv_window_lock);
 	sbi->s_rsv_window_root = RB_ROOT;
@@ -1945,15 +1930,29 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	if (!test_opt(sb, NOLOAD) &&
 	    EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
 		if (ext3_load_journal(sb, es, journal_devnum))
-			goto failed_mount3;
+			goto failed_mount2;
 	} else if (journal_inum) {
 		if (ext3_create_journal(sb, es, journal_inum))
-			goto failed_mount3;
+			goto failed_mount2;
 	} else {
 		if (!silent)
 			ext3_msg(sb, KERN_ERR,
 				"error: no journal found. "
 				"mounting ext3 over ext2?");
+		goto failed_mount2;
+	}
+	err = percpu_counter_init(&sbi->s_freeblocks_counter,
+			ext3_count_free_blocks(sb));
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_freeinodes_counter,
+				ext3_count_free_inodes(sb));
+	}
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_dirs_counter,
+				ext3_count_dirs(sb));
+	}
+	if (err) {
+		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
 		goto failed_mount3;
 	}
 
@@ -1978,7 +1977,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 			ext3_msg(sb, KERN_ERR,
 				"error: journal does not support "
 				"requested data journaling mode");
-			goto failed_mount4;
+			goto failed_mount3;
 		}
 	default:
 		break;
@@ -2001,19 +2000,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	if (IS_ERR(root)) {
 		ext3_msg(sb, KERN_ERR, "error: get root inode failed");
 		ret = PTR_ERR(root);
-		goto failed_mount4;
+		goto failed_mount3;
 	}
 	if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
 		iput(root);
 		ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");
-		goto failed_mount4;
+		goto failed_mount3;
 	}
 	sb->s_root = d_alloc_root(root);
 	if (!sb->s_root) {
 		ext3_msg(sb, KERN_ERR, "error: get root dentry failed");
 		iput(root);
 		ret = -ENOMEM;
-		goto failed_mount4;
+		goto failed_mount3;
 	}
 
 	ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
@@ -2039,12 +2038,11 @@ cantfind_ext3:
 		       sb->s_id);
 	goto failed_mount;
 
-failed_mount4:
-	journal_destroy(sbi->s_journal);
 failed_mount3:
 	percpu_counter_destroy(&sbi->s_freeblocks_counter);
 	percpu_counter_destroy(&sbi->s_freeinodes_counter);
 	percpu_counter_destroy(&sbi->s_dirs_counter);
+	journal_destroy(sbi->s_journal);
 failed_mount2:
 	for (i = 0; i < db_count; i++)
 		brelse(sbi->s_group_desc[i]);
-- 
1.6.6.1

Re: [PATCH 1/2] ext3: init statistics after journal recovery v2

[Jan Kara]

On Mon 12-04-10 23:46:00, Dmitry Monakhov wrote:
> 
> Currently block/inode/dir counters initialized before journal was
> recovered. In fact after journal recovery this info will probably
> change which result in incorrect statfs()
> BUG:#15768
  Merged. Thanks.

								Honza

> 
> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
> ---
>  fs/ext3/super.c |   44 +++++++++++++++++++++-----------------------
>  1 files changed, 21 insertions(+), 23 deletions(-)
> 
> diff --git a/fs/ext3/super.c b/fs/ext3/super.c
> index e844acc..436e0dc 100644
> --- a/fs/ext3/super.c
> +++ b/fs/ext3/super.c
> @@ -1890,21 +1890,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>  	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
>  	spin_lock_init(&sbi->s_next_gen_lock);
>  
> -	err = percpu_counter_init(&sbi->s_freeblocks_counter,
> -			ext3_count_free_blocks(sb));
> -	if (!err) {
> -		err = percpu_counter_init(&sbi->s_freeinodes_counter,
> -				ext3_count_free_inodes(sb));
> -	}
> -	if (!err) {
> -		err = percpu_counter_init(&sbi->s_dirs_counter,
> -				ext3_count_dirs(sb));
> -	}
> -	if (err) {
> -		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
> -		goto failed_mount3;
> -	}
> -
>  	/* per fileystem reservation list head & lock */
>  	spin_lock_init(&sbi->s_rsv_window_lock);
>  	sbi->s_rsv_window_root = RB_ROOT;
> @@ -1945,15 +1930,29 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>  	if (!test_opt(sb, NOLOAD) &&
>  	    EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
>  		if (ext3_load_journal(sb, es, journal_devnum))
> -			goto failed_mount3;
> +			goto failed_mount2;
>  	} else if (journal_inum) {
>  		if (ext3_create_journal(sb, es, journal_inum))
> -			goto failed_mount3;
> +			goto failed_mount2;
>  	} else {
>  		if (!silent)
>  			ext3_msg(sb, KERN_ERR,
>  				"error: no journal found. "
>  				"mounting ext3 over ext2?");
> +		goto failed_mount2;
> +	}
> +	err = percpu_counter_init(&sbi->s_freeblocks_counter,
> +			ext3_count_free_blocks(sb));
> +	if (!err) {
> +		err = percpu_counter_init(&sbi->s_freeinodes_counter,
> +				ext3_count_free_inodes(sb));
> +	}
> +	if (!err) {
> +		err = percpu_counter_init(&sbi->s_dirs_counter,
> +				ext3_count_dirs(sb));
> +	}
> +	if (err) {
> +		ext3_msg(sb, KERN_ERR, "error: insufficient memory");
>  		goto failed_mount3;
>  	}
>  
> @@ -1978,7 +1977,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>  			ext3_msg(sb, KERN_ERR,
>  				"error: journal does not support "
>  				"requested data journaling mode");
> -			goto failed_mount4;
> +			goto failed_mount3;
>  		}
>  	default:
>  		break;
> @@ -2001,19 +2000,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>  	if (IS_ERR(root)) {
>  		ext3_msg(sb, KERN_ERR, "error: get root inode failed");
>  		ret = PTR_ERR(root);
> -		goto failed_mount4;
> +		goto failed_mount3;
>  	}
>  	if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
>  		iput(root);
>  		ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");
> -		goto failed_mount4;
> +		goto failed_mount3;
>  	}
>  	sb->s_root = d_alloc_root(root);
>  	if (!sb->s_root) {
>  		ext3_msg(sb, KERN_ERR, "error: get root dentry failed");
>  		iput(root);
>  		ret = -ENOMEM;
> -		goto failed_mount4;
> +		goto failed_mount3;
>  	}
>  
>  	ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
> @@ -2039,12 +2038,11 @@ cantfind_ext3:
>  		       sb->s_id);
>  	goto failed_mount;
>  
> -failed_mount4:
> -	journal_destroy(sbi->s_journal);
>  failed_mount3:
>  	percpu_counter_destroy(&sbi->s_freeblocks_counter);
>  	percpu_counter_destroy(&sbi->s_freeinodes_counter);
>  	percpu_counter_destroy(&sbi->s_dirs_counter);
> +	journal_destroy(sbi->s_journal);
>  failed_mount2:
>  	for (i = 0; i < db_count; i++)
>  		brelse(sbi->s_group_desc[i]);
> -- 
> 1.6.6.1
> 
-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR

Re: [PATCH 2/2] ext4: init statistics after journal recovery v2

[tytso]

This is what I've checked into the ext4 patch queue.  Fixes some
whitespace issues, and removed some unneeded curly braces.

	   	       	       	    - Ted

ext4: init statistics after journal recovery

From: Dmitry Monakhov <dmonakhov@openvz.org>

Currently block/inode/dir counters initialized before journal was
recovered. In fact after journal recovery this info will probably
change. And freeblocks it critical for correct delalloc mode
accounting.

https://bugzilla.kernel.org/show_bug.cgi?id=15768

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
 fs/ext4/super.c |   40 ++++++++++++++++++----------------------
 1 files changed, 18 insertions(+), 22 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 00d09f5..d83cdcb 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2794,24 +2794,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	spin_lock_init(&sbi->s_next_gen_lock);
 
-	err = percpu_counter_init(&sbi->s_freeblocks_counter,
-			ext4_count_free_blocks(sb));
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_freeinodes_counter,
-				ext4_count_free_inodes(sb));
-	}
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_dirs_counter,
-				ext4_count_dirs(sb));
-	}
-	if (!err) {
-		err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
-	}
-	if (err) {
-		ext4_msg(sb, KERN_ERR, "insufficient memory");
-		goto failed_mount3;
-	}
-
 	sbi->s_stripe = ext4_get_stripe_size(sbi);
 	sbi->s_max_writeback_mb_bump = 128;
 
@@ -2911,6 +2893,20 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	set_task_ioprio(sbi->s_journal->j_task, journal_ioprio);
 
 no_journal:
+	err = percpu_counter_init(&sbi->s_freeblocks_counter,
+				  ext4_count_free_blocks(sb));
+	if (!err)
+		err = percpu_counter_init(&sbi->s_freeinodes_counter,
+					  ext4_count_free_inodes(sb));
+	if (!err)
+		err = percpu_counter_init(&sbi->s_dirs_counter,
+					  ext4_count_dirs(sb));
+	if (!err)
+		err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
+	if (err) {
+		ext4_msg(sb, KERN_ERR, "insufficient memory");
+		goto failed_mount_wq;
+	}
 	if (test_opt(sb, NOBH)) {
 		if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) {
 			ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - "
@@ -3060,6 +3056,10 @@ failed_mount_wq:
 		jbd2_journal_destroy(sbi->s_journal);
 		sbi->s_journal = NULL;
 	}
+	percpu_counter_destroy(&sbi->s_freeblocks_counter);
+	percpu_counter_destroy(&sbi->s_freeinodes_counter);
+	percpu_counter_destroy(&sbi->s_dirs_counter);
+	percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
 failed_mount3:
 	if (sbi->s_flex_groups) {
 		if (is_vmalloc_addr(sbi->s_flex_groups))
@@ -3067,10 +3067,6 @@ failed_mount3:
 		else
 			kfree(sbi->s_flex_groups);
 	}
-	percpu_counter_destroy(&sbi->s_freeblocks_counter);
-	percpu_counter_destroy(&sbi->s_freeinodes_counter);
-	percpu_counter_destroy(&sbi->s_dirs_counter);
-	percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
 failed_mount2:
 	for (i = 0; i < db_count; i++)
 		brelse(sbi->s_group_desc[i]);