Re: + ocfs2-rewrite-error-handling-of-ocfs2_fill_super.patch added to -mm tree

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On 4/29/22 6:00 AM, Andrew Morton wrote:
> The patch titled
>      Subject: ocfs2: rewrite error handling of ocfs2_fill_super
> has been added to the -mm tree.  Its filename is
>      ocfs2-rewrite-error-handling-of-ocfs2_fill_super.patch
> 
> This patch should soon appear at
>     https://ozlabs.org/~akpm/mmots/broken-out/ocfs2-rewrite-error-handling-of-ocfs2_fill_super.patch
> and later at
>     https://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-rewrite-error-handling-of-ocfs2_fill_super.patch
> 
> Before you just go and hit "reply", please:
>    a) Consider who else should be cc'ed
>    b) Prefer to cc a suitable mailing list as well
>    c) Ideally: find the original patch on the mailing list and do a
>       reply-to-all to that, adding suitable additional cc's
> 
> *** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
> 
> The -mm tree is included into linux-next and is updated
> there every 3-4 working days
> 
> ------------------------------------------------------
> From: Heming Zhao via Ocfs2-devel <ocfs2-devel@xxxxxxxxxxxxxx>
> Subject: ocfs2: rewrite error handling of ocfs2_fill_super
> 
> Current ocfs2_fill_super() uses one goto label "read_super_error" to
> handle all error cases.  And with previous serial patches, the error
> handling should fork more branches to handle different error cases.  This
> patch rewrite the error handling of ocfs2_fill_super.
> 
> Link: https://lkml.kernel.org/r/20220424130952.2436-6-heming.zhao@xxxxxxxx
> Signed-off-by: Heming Zhao <heming.zhao@xxxxxxxx>
> Cc: Changwei Ge <gechangwei@xxxxxxx>
> Cc: Gang He <ghe@xxxxxxxx>
> Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
> Cc: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>

Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>

> Cc: Jun Piao <piaojun@xxxxxxxxxx>
> Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
> Cc: Mark Fasheh <mark@xxxxxxxxxx>
> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> ---
> 
>  fs/ocfs2/super.c |   67 +++++++++++++++++++++------------------------
>  1 file changed, 32 insertions(+), 35 deletions(-)
> 
> --- a/fs/ocfs2/super.c~ocfs2-rewrite-error-handling-of-ocfs2_fill_super
> +++ a/fs/ocfs2/super.c
> @@ -989,28 +989,27 @@ static int ocfs2_fill_super(struct super
>  
>  	if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
>  		status = -EINVAL;
> -		goto read_super_error;
> +		goto out;
>  	}
>  
>  	/* probe for superblock */
>  	status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
>  	if (status < 0) {
>  		mlog(ML_ERROR, "superblock probe failed!\n");
> -		goto read_super_error;
> +		goto out;
>  	}
>  
>  	status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
> -	osb = OCFS2_SB(sb);
> -	if (status < 0) {
> -		mlog_errno(status);
> -		goto read_super_error;
> -	}
>  	brelse(bh);
>  	bh = NULL;
> +	if (status < 0)
> +		goto out;
> +
> +	osb = OCFS2_SB(sb);
>  
>  	if (!ocfs2_check_set_options(sb, &parsed_options)) {
>  		status = -EINVAL;
> -		goto read_super_error;
> +		goto out_super;
>  	}
>  	osb->s_mount_opt = parsed_options.mount_opt;
>  	osb->s_atime_quantum = parsed_options.atime_quantum;
> @@ -1027,7 +1026,7 @@ static int ocfs2_fill_super(struct super
>  
>  	status = ocfs2_verify_userspace_stack(osb, &parsed_options);
>  	if (status)
> -		goto read_super_error;
> +		goto out_super;
>  
>  	sb->s_magic = OCFS2_SUPER_MAGIC;
>  
> @@ -1041,7 +1040,7 @@ static int ocfs2_fill_super(struct super
>  			status = -EACCES;
>  			mlog(ML_ERROR, "Readonly device detected but readonly "
>  			     "mount was not specified.\n");
> -			goto read_super_error;
> +			goto out_super;
>  		}
>  
>  		/* You should not be able to start a local heartbeat
> @@ -1050,7 +1049,7 @@ static int ocfs2_fill_super(struct super
>  			status = -EROFS;
>  			mlog(ML_ERROR, "Local heartbeat specified on readonly "
>  			     "device.\n");
> -			goto read_super_error;
> +			goto out_super;
>  		}
>  
>  		status = ocfs2_check_journals_nolocks(osb);
> @@ -1059,9 +1058,7 @@ static int ocfs2_fill_super(struct super
>  				mlog(ML_ERROR, "Recovery required on readonly "
>  				     "file system, but write access is "
>  				     "unavailable.\n");
> -			else
> -				mlog_errno(status);
> -			goto read_super_error;
> +			goto out_super;
>  		}
>  
>  		ocfs2_set_ro_flag(osb, 1);
> @@ -1077,10 +1074,8 @@ static int ocfs2_fill_super(struct super
>  	}
>  
>  	status = ocfs2_verify_heartbeat(osb);
> -	if (status < 0) {
> -		mlog_errno(status);
> -		goto read_super_error;
> -	}
> +	if (status < 0)
> +		goto out_super;
>  
>  	osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
>  						 ocfs2_debugfs_root);
> @@ -1094,15 +1089,14 @@ static int ocfs2_fill_super(struct super
>  
>  	status = ocfs2_mount_volume(sb);
>  	if (status < 0)
> -		goto read_super_error;
> +		goto out_debugfs;
>  
>  	if (osb->root_inode)
>  		inode = igrab(osb->root_inode);
>  
>  	if (!inode) {
>  		status = -EIO;
> -		mlog_errno(status);
> -		goto read_super_error;
> +		goto out_dismount;
>  	}
>  
>  	osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
> @@ -1110,7 +1104,7 @@ static int ocfs2_fill_super(struct super
>  	if (!osb->osb_dev_kset) {
>  		status = -ENOMEM;
>  		mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
> -		goto read_super_error;
> +		goto out_dismount;
>  	}
>  
>  	/* Create filecheck sysfs related directories/files at
> @@ -1119,14 +1113,13 @@ static int ocfs2_fill_super(struct super
>  		status = -ENOMEM;
>  		mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
>  			"/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
> -		goto read_super_error;
> +		goto out_dismount;
>  	}
>  
>  	root = d_make_root(inode);
>  	if (!root) {
>  		status = -ENOMEM;
> -		mlog_errno(status);
> -		goto read_super_error;
> +		goto out_dismount;
>  	}
>  
>  	sb->s_root = root;
> @@ -1178,17 +1171,21 @@ static int ocfs2_fill_super(struct super
>  
>  	return status;
>  
> -read_super_error:
> -	brelse(bh);
> -
> -	if (status)
> -		mlog_errno(status);
> +out_dismount:
> +	atomic_set(&osb->vol_state, VOLUME_DISABLED);
> +	wake_up(&osb->osb_mount_event);
> +	ocfs2_dismount_volume(sb, 1);
> +	goto out;
>  
> -	if (osb) {
> -		atomic_set(&osb->vol_state, VOLUME_DISABLED);
> -		wake_up(&osb->osb_mount_event);
> -		ocfs2_dismount_volume(sb, 1);
> -	}
> +out_debugfs:
> +	debugfs_remove_recursive(osb->osb_debug_root);
> +out_super:
> +	ocfs2_release_system_inodes(osb);
> +	kfree(osb->recovery_map);
> +	ocfs2_delete_osb(osb);
> +	kfree(osb);
> +out:
> +	mlog_errno(status);
>  
>  	return status;
>  }
> _
> 
> Patches currently in -mm which might be from ocfs2-devel@xxxxxxxxxxxxxx are
> 
> ocfs2-fix-mounting-crash-if-journal-is-not-alloced.patch
> ocfs2-change-return-type-of-ocfs2_resmap_init.patch
> ocfs2-ocfs2_initialize_super-does-cleanup-job-before-return-error.patch
> ocfs2-ocfs2_mount_volume-does-cleanup-job-before-return-error.patch
> ocfs2-rewrite-error-handling-of-ocfs2_fill_super.patch



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