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Date:      Fri, 19 Mar 2021 15:53:16 -0500
From:      Kyle Evans <kevans@freebsd.org>
To:        Alan Somers <asomers@freebsd.org>
Cc:        src-committers <src-committers@freebsd.org>,  "<dev-commits-src-all@freebsd.org>" <dev-commits-src-all@freebsd.org>, dev-commits-src-main@freebsd.org
Subject:   Re: git: 929acdb19acb - main - fusefs: fix two bugs regarding fcntl file locks
Message-ID:  <CACNAnaHncxFxU3GwycZX=gienCi3gMQNXAQE=JJHF_H8v9-8yg@mail.gmail.com>
In-Reply-To: <202103182309.12IN9nXd002407@gitrepo.freebsd.org>
References:  <202103182309.12IN9nXd002407@gitrepo.freebsd.org>

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On Thu, Mar 18, 2021 at 6:09 PM Alan Somers <asomers@freebsd.org> wrote:
>
> The branch main has been updated by asomers:
>
> URL: https://cgit.FreeBSD.org/src/commit/?id=929acdb19acb67cc0e6ee5439df98e28a84d4772
>
> commit 929acdb19acb67cc0e6ee5439df98e28a84d4772
> Author:     Alan Somers <asomers@FreeBSD.org>
> AuthorDate: 2021-03-18 20:27:27 +0000
> Commit:     Alan Somers <asomers@FreeBSD.org>
> CommitDate: 2021-03-18 23:09:10 +0000
>
>     fusefs: fix two bugs regarding fcntl file locks
>
>     1) F_SETLKW (blocking) operations would be sent to the FUSE server as
>        F_SETLK (non-blocking).
>
>     2) Release operations, F_SETLK with lk_type = F_UNLCK, would simply
>        return EINVAL.
>
>     PR:             253500
>     Reported by:    John Millikin <jmillikin@gmail.com>
>     MFC after:      2 weeks
> ---
>  sys/fs/fuse/fuse_vnops.c       | 10 +++++++---
>  tests/sys/fs/fusefs/flush.cc   | 12 ++++++++++-
>  tests/sys/fs/fusefs/locks.cc   | 45 +++++++++++++++++++++++++++++++++++++++++-
>  tests/sys/fs/fusefs/release.cc | 12 ++++++++++-
>  4 files changed, 73 insertions(+), 6 deletions(-)
>
> diff --git a/sys/fs/fuse/fuse_vnops.c b/sys/fs/fuse/fuse_vnops.c
> index 5bbde1e278c9..cdbc42f5adf4 100644
> --- a/sys/fs/fuse/fuse_vnops.c
> +++ b/sys/fs/fuse/fuse_vnops.c
> @@ -437,10 +437,14 @@ fuse_vnop_advlock(struct vop_advlock_args *ap)
>                 op = FUSE_GETLK;
>                 break;
>         case F_SETLK:
> -               op = FUSE_SETLK;
> +               if (flags & F_WAIT)
> +                       op = FUSE_SETLKW;
> +               else
> +                       op = FUSE_SETLK;
>                 break;
> -       case F_SETLKW:
> -               op = FUSE_SETLKW;
> +       case F_UNLCK:
> +               op = FUSE_SETLK;
> +               flags |= F_UNLCK;
>                 break;
>         default:
>                 return EINVAL;

Hi,

The committed version of this appears to have brought back the
redundant assignment to `flags`

Thanks,

Kyle Evans



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