Re: [PATCH] btrfs: use inode->i_sb to calculate fs_info

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

在 2026/2/10 05:41, Goldwyn Rodrigues 写道:
> If overlay is used on top of btrfs, dentry->d_sb translates to overlay's
> super block and fsid assignment will lead to a crash.
> 
> Use inode->i_sb to calculate btrfs_sb.
> 
> Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>

Reviewed-by: Qu Wenruo <wqu@suse.com>

Thanks,
Qu

> ---
>   include/trace/events/btrfs.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
> index 125bdc166bfe..94a197557382 100644
> --- a/include/trace/events/btrfs.h
> +++ b/include/trace/events/btrfs.h
> @@ -772,7 +772,7 @@ TRACE_EVENT(btrfs_sync_file,
>   		const struct dentry *dentry = file->f_path.dentry;
>   		const struct inode *inode = d_inode(dentry);
>   
> -		TP_fast_assign_fsid(btrfs_sb(file->f_path.dentry->d_sb));
> +		TP_fast_assign_fsid(btrfs_sb(inode->i_sb));
>   		__entry->ino		= btrfs_ino(BTRFS_I(inode));
>   		__entry->parent		= btrfs_ino(BTRFS_I(d_inode(dentry->d_parent)));
>   		__entry->datasync	= datasync;