From: Kirill Smelkov <kirr@nexedi.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Miklos Szeredi <mszeredi@redhat.com>,
Han-Wen Nienhuys <hanwen@google.com>,
Jakob Unterwurzacher <jakobunt@gmail.com>,
Kirill Tkhai <ktkhai@virtuozzo.com>,
Andrew Morton <akpm@linux-foundation.org>,
<linux-fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
fuse-devel <fuse-devel@lists.sourceforge.net>,
stable <stable@vger.kernel.org>
Subject: Re: [RESEND4, PATCH 1/2] fuse: retrieve: cap requested size to negotiated max_write
Date: Wed, 24 Apr 2019 12:31:13 +0000 [thread overview]
Message-ID: <20190424123107.GA32024@deco.navytux.spb.ru> (raw)
In-Reply-To: <CAJfpegsiWuykUsfg=sO8sKo5h86U65q10=e=wYKXTQEHW8DFkw@mail.gmail.com>
On Wed, Apr 24, 2019 at 02:17:27PM +0200, Miklos Szeredi wrote:
> On Wed, Apr 24, 2019 at 1:56 PM Kirill Smelkov <kirr@nexedi.com> wrote:
>
> > I assume you are meaning this:
> >
> > --- a/fs/fuse/dev.c
> > +++ b/fs/fuse/dev.c
> > @@ -1745,15 +1745,15 @@ static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode,
> > unsigned int offset;
> > size_t total_len = 0;
> > unsigned int num_pages;
> >
> > offset = outarg->offset & ~PAGE_MASK;
> > file_size = i_size_read(inode);
> >
> > - num = outarg->size;
> > + num = min(outarg->size, fc->max_write);
> > if (outarg->offset > file_size)
> > num = 0;
> > else if (outarg->offset + num > file_size)
> > num = file_size - outarg->offset; <-- THIS
> >
> > num_pages = (num + offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
> > num_pages = min(num_pages, fc->max_pages);
> >
> > and then in this case (offset + num > file_size) num overwrite
> >
> > num = file_size - offset
> >
> > can make num only smaller, right? And then the patch is not wrong because there
> > is no other num overwriting in this function except when num is being further
> > decremented in loop that prepares pages to retrieve.
>
> You're right, of course.
Thanks. Does it mean that the patch is ok? Do I need to rework
something?
> > > Also the patch is whitespace damaged.
> >
> > I've tried to do the following in my mutt on "RESEND4, PATCH 1/2"
> > message:
> >
> > |(cd ~/src/linux/linux && git am -)
> >
> > and the patch applied successfully. So could you please clarify what
> > "whitespace damaged" means?
>
> Hmm, apparently this (and only this) message is "quoted-printable"
> encoded. git-am seems to handle it fine, but my script doesn't.
> Anyway, I'll do it manually.
I see. Probably it is not "quoted-printable" as
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
suggests and it is maybe due to UTF-8 characters (I used "·" several
times in patch description). Anyway if it helps you can pull the patch
from here
https://lab.nexedi.com/kirr/linux.git y/fuse-retrieve-cap-max_write
and then cherry-pick it (git cherry-pick fd482f96537a) to where needed.
Thanks again for feedback,
Kirill
next prev parent reply other threads:[~2019-04-24 13:01 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 10:15 [RESEND4, PATCH 0/2] fuse: don't stuck clients on retrieve_notify with size > max_write Kirill Smelkov
2019-03-27 10:15 ` [RESEND4, PATCH 2/2] fuse: require /dev/fuse reads to have enough buffer capacity as negotiated Kirill Smelkov
2019-04-24 10:48 ` Miklos Szeredi
2019-04-24 11:58 ` Kirill Smelkov
2019-03-27 10:15 ` [RESEND4, PATCH 1/2] fuse: retrieve: cap requested size to negotiated max_write Kirill Smelkov
2019-04-24 10:44 ` Miklos Szeredi
2019-04-24 11:56 ` Kirill Smelkov
2019-04-24 12:17 ` Miklos Szeredi
2019-04-24 12:31 ` Kirill Smelkov [this message]
2019-04-24 13:19 ` Miklos Szeredi
2019-04-24 14:22 ` Kirill Smelkov
2019-04-24 15:02 ` Miklos Szeredi
2019-04-24 18:10 ` Kirill Smelkov
2019-04-24 18:59 ` Kirill Smelkov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190424123107.GA32024@deco.navytux.spb.ru \
--to=kirr@nexedi.com \
--cc=akpm@linux-foundation.org \
--cc=fuse-devel@lists.sourceforge.net \
--cc=hanwen@google.com \
--cc=jakobunt@gmail.com \
--cc=ktkhai@virtuozzo.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=miklos@szeredi.hu \
--cc=mszeredi@redhat.com \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).