linux-kernel - Re: linux-next: manual merge of the vfs-brauner tree with the cifs tree

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Message-ID: <20240906114809.08a545d9@canb.auug.org.au>
Date: Fri, 6 Sep 2024 11:48:09 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Christian Brauner <brauner@...nel.org>, Steve French
 <smfrench@...il.com>
Cc: CIFS <linux-cifs@...r.kernel.org>, David Howells <dhowells@...hat.com>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Next
 Mailing List <linux-next@...r.kernel.org>, Steve French
 <stfrench@...rosoft.com>
Subject: Re: linux-next: manual merge of the vfs-brauner tree with the cifs
 tree

Hi all,

On Fri, 6 Sep 2024 09:38:21 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> On Fri, 6 Sep 2024 08:46:37 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> >
> > Today's linux-next merge of the vfs-brauner tree got a conflict in:
> > 
> >   fs/smb/client/cifssmb.c
> > 
> > between commit:
> > 
> >   a68c74865f51 ("cifs: Fix SMB1 readv/writev callback in the same way as SMB2/3")
> > 
> > from the cifs tree and commit:
> > 
> >   0fda1f8c6bf8 ("netfs: Speed up buffered reading")
> > 
> > from the vfs-brauner tree.
> > 
> > I fixed it up (I used the former as it is (supposedly) a much newer patch)
> > 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.  
> 
> The fixup ended up being as below.
> 
> -- 
> Cheers,
> Stephen Rothwell
> 
> diff --cc fs/smb/client/cifssmb.c
> index cfae2e918209,04f2a5441a89..790b3f5ea64b
> --- a/fs/smb/client/cifssmb.c
> +++ b/fs/smb/client/cifssmb.c
> @@@ -1261,16 -1261,6 +1261,15 @@@ openRetry
>   	return rc;
>   }
>   
>  +static void cifs_readv_worker(struct work_struct *work)
>  +{
>  +	struct cifs_io_subrequest *rdata =
>  +		container_of(work, struct cifs_io_subrequest, subreq.work);
>  +
> - 	netfs_subreq_terminated(&rdata->subreq,
> - 				(rdata->result == 0 || rdata->result == -EAGAIN) ?
> - 				rdata->got_bytes : rdata->result, true);
> ++	rdata->subreq.transferred += rdata->got_bytes;
> ++	netfs_read_subreq_terminated(&rdata->subreq, rdata->result, true);
>  +}
>  +
>   static void
>   cifs_readv_callback(struct mid_q_entry *mid)
>   {

Also this (which I will roll into the above merge resolution tomorrow):

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Fri, 6 Sep 2024 11:39:25 +1000
Subject: [PATCH] fix up for "netfs: Speed up buffered reading"

interacting with "cifs: Fix SMB1 readv/writev callback in the same way
as SMB2/3"

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 fs/smb/client/cifssmb.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c
index 790b3f5ea64b..76fb2287c17b 100644
--- a/fs/smb/client/cifssmb.c
+++ b/fs/smb/client/cifssmb.c
@@ -1326,9 +1326,9 @@ cifs_readv_callback(struct mid_q_entry *mid)
 		__set_bit(NETFS_SREQ_HIT_EOF, &rdata->subreq.flags);
 		rdata->result = 0;
 	} else {
-		if (rdata->got_bytes < rdata->actual_len &&
-		    rdata->subreq.start + rdata->subreq.transferred + rdata->got_bytes ==
-		    ictx->remote_i_size) {
+		size_t trans = rdata->subreq.transferred + rdata->got_bytes;
+		if (trans < rdata->subreq.len &&
+		    rdata->subreq.start + trans == ictx->remote_i_size) {
 			__set_bit(NETFS_SREQ_HIT_EOF, &rdata->subreq.flags);
 			rdata->result = 0;
 		}
-- 
2.45.2

-- 
Cheers,
Stephen Rothwell

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