On 13.10.20 01:47, Stephen Rothwell wrote:
> Hi all,
>
> Today's linux-next merge of the fuse tree got a conflict in:
>
> fs/fuse/file.c
>
> between commit:
>
> 933a3752babc ("fuse: fix the ->direct_IO() treatment of iov_iter")
>
> from Linus' tree and commit:
>
> fcee216beb9c ("fuse: split fuse_mount off of fuse_conn")
>
> from the fuse tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
Thanks! Semantically, the change looks good to me, I just noticed
something about the indentation:
> diff --cc fs/fuse/file.c
> index 43c165e796da,53d4dd1ab992..000000000000
> --- a/fs/fuse/file.c
> +++ b/fs/fuse/file.c
> @@@ -3120,17 -3156,10 +3146,18 @@@ fuse_direct_IO(struct kiocb *iocb, stru
> * By default, we want to optimize all I/Os with async request
> * submission to the client filesystem if supported.
> */
> - io->async = ff->fc->async_dio;
> - io->async = async_dio;
> ++ io->async = ff->fm->fc->async_dio;
> io->iocb = iocb;
> io->blocking = is_sync_kiocb(iocb);
>
> + /* optimization for short read */
> + if (io->async && !io->write && offset + count > i_size) {
> - iov_iter_truncate(iter, fuse_round_up(ff->fc, i_size - offset));
> ++ iov_iter_truncate(iter, fuse_round_up(ff->fm->fc,
> ++ i_size - offset));
Personally, I’d align this second line to the opening parenthesis of
fuse_round_up() (as it is done in fcee216beb9c, in a hunk not shown
here, probably because it’s been dropped in the merge.).
Max
> + shortened = count - iov_iter_count(iter);
> + count -= shortened;
> + }
> +
> /*
> * We cannot asynchronously extend the size of a file.
> * In such case the aio will behave exactly like sync io.
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