linux-kernel - Re: ext4 iomap SEEK broken [was: [GIT PULL] ext4 updates for 4.15]

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Date:   Mon, 12 Feb 2018 14:38:17 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     Theodore Ts'o <tytso@....edu>, linux-kernel@...r.kernel.org,
        linux-ext4@...r.kernel.org, Christoph Hellwig <hch@...radead.org>
Subject: Re: ext4 iomap SEEK broken [was: [GIT PULL] ext4 updates for 4.15]

On 02/12/2018, 02:34 PM, Jiri Slaby wrote:
> @@ -3523,7 +3523,7 @@ static int ext4_iomap_begin(struct inode *inode,
> loff_t offset, loff_t length,
>                 iomap->flags |= IOMAP_F_DIRTY;
>         iomap->bdev = inode->i_sb->s_bdev;
>         iomap->dax_dev = sbi->s_daxdev;
> -       iomap->offset = first_block << blkbits;
> +       iomap->offset = (u64)first_block << blkbits;
>         iomap->length = (u64)map.m_len << blkbits;
> 
>         if (ret == 0) {
> 
> sounds about right?

Or even simpler:
-       iomap->offset = first_block << blkbits;
+       iomap->offset = offset;

>> regards,-- 
js
suse labs